)\r\n }else{\r\n return this.loadingScreen();\r\n }\r\n }\r\n\r\n displayOpenNewPageLink(game){\r\n let link = <>;\r\n if(this.props?.boardGameHyperlinkMap){\r\n if(this.props?.boardGameHyperlinkMap[game]){\r\n let boardGameId = this.props?.boardGameHyperlinkMap[game];\r\n link = (
)\r\n } \r\n }\r\n return link;\r\n }\r\n\r\n render(){\r\n\r\n \r\n return (\r\n <>\r\n {this.getScheduleScreen()}\r\n \r\n );\r\n }\r\n}\r\n\r\nexport default Schedule;\r\n","const colorList = [\r\n 'rgb(230, 25, 75)', \r\n 'rgb(60, 180, 75)', \r\n 'rgb(201, 225, 25)', \r\n 'rgb(0, 130, 200)', \r\n 'rgb(245, 130, 48)', \r\n 'rgb(145, 30, 180)', \r\n 'rgb(70, 240, 240)', \r\n 'rgb(240, 50, 230)', \r\n 'rgb(210, 245, 60)', \r\n 'rgb(201, 190, 212)', \r\n 'rgb(0, 128, 128)', \r\n 'rgb(220, 190, 255)', \r\n 'rgb(170, 110, 40)', \r\n 'rgb(201, 250, 200)', \r\n 'rgb(128, 0, 0)', \r\n 'rgb(170, 255, 195)', \r\n 'rgb(128, 128, 0)', \r\n 'rgb(201, 215, 180)', \r\n 'rgb(0, 0, 128)', \r\n 'rgb(128, 128, 128)'\r\n]\r\n\r\nexport default colorList;","import colorList from \"./colorList\"; \r\n\r\nexport function formatChartJSObject(params){\r\n const {xAxisLabels, datasets, max} = params;\r\n return {\r\n type: 'line',\r\n data: {\r\n labels: xAxisLabels,\r\n datasets: datasets\r\n },\r\n options: {\r\n maintainAspectRatio: false,\r\n elements:{\r\n point: {\r\n pointStyle: false\r\n },\r\n line:{\r\n tension: 0.1\r\n }\r\n },\r\n interaction:{\r\n mode: 'nearest',\r\n intersect: false,\r\n }, \r\n plugins: {\r\n legend: {\r\n position: 'bottom',\r\n labels: {\r\n usePointStyle: true,\r\n pointStyle: 'line',\r\n font: {\r\n size: 10,\r\n weight: \"bold\",\r\n family: \"'LouisGeorge','Helvetica Neue', 'Helvetica', 'Arial', sans-serif\"\r\n },\r\n boxWidth: 100,\r\n sort: (a, b) => {\r\n return a.text < b.text ? -1 : 1;\r\n }\r\n \r\n },\r\n\r\n align: 'center',\r\n onHover: function(event, legendItem) {},\r\n onClick: function(event, legendItem) {\r\n highlightLine(event, this.chart, legendItem.datasetIndex)\r\n }\r\n }\r\n },\r\n scales: {\r\n y: {\r\n // reverse: options?.reverse ? options.reverse : false,\r\n // stacked: true,\r\n ticks: {\r\n display: true,\r\n autoSkip: false,\r\n // maxTicksLimit: 5,\r\n includeBounds: false,\r\n // callback: function(value, index, ticks) {\r\n // value = parseInt(value);\r\n \r\n // if(value === 1 || (value % 5 === 0 && value !== 0)){\r\n // return value;\r\n // }else{\r\n // return ''\r\n // }\r\n // }\r\n font: {\r\n size: 10,\r\n weight: \"bold\",\r\n family: \"'LouisGeorge','Helvetica Neue', 'Helvetica', 'Arial', sans-serif\"\r\n },\r\n backdropColor:'rgba(255, 100, 255, 0.75)'\r\n },\r\n max: max ? max : datasets.length + 1,\r\n min:0,\r\n text: \"Power Rankings\"\r\n\r\n },\r\n x: {\r\n ticks: {\r\n font: {\r\n size: 10,\r\n weight: \"bold\",\r\n family: \"'LouisGeorge','Helvetica Neue', 'Helvetica', 'Arial', sans-serif\"\r\n }\r\n },\r\n\r\n }\r\n },\r\n aspectRatio: 0.75\r\n }\r\n }\r\n}\r\n\r\n \r\n\r\n// function randomColor() {\r\n// var o = Math.round, r = Math.random, s = 255;\r\n// let solidColor = 'rgb(' + o(r()*s) + ',' + o(r()*s) + ',' + o(r()*s) + ')';\r\n// let fill = 'rgba' + solidColor.substring(3, solidColor.length - 1) + ',' + 0.2 + ')';\r\n// return {\r\n// line: solidColor,\r\n// fill: fill\r\n// }\r\n// }\r\n\r\nexport function getColor(index){\r\n let solidColor = colorList[index];\r\n let mostFill = 'rgba' + solidColor.substring(3, solidColor.length - 1) + ',' + 0.9 + ')';\r\n let fill = 'rgba' + solidColor.substring(3, solidColor.length - 1) + ',' + 0.2 + ')';\r\n return {\r\n line: mostFill,\r\n fill: fill\r\n }\r\n}\r\n\r\n\r\nexport function highlightLine(event, myChart, line){\r\n const points = myChart.getElementsAtEventForMode(event, 'nearest', { intersect: true }, true);\r\n let clickedLines = [line];\r\n if(points && points.length > 0){\r\n clickedLines = points.map((point) => {return point.datasetIndex });\r\n }\r\n\r\n \r\n\r\n // selectedLine = line\r\n if(areClickedLinesHighlighted(clickedLines, myChart)){\r\n myChart.config.data.datasets.forEach((dataset, index) => {\r\n dataset.borderColor = getColor(index).line\r\n dataset.borderWidth = 3\r\n })\r\n }else{\r\n myChart.config.data.datasets.forEach((dataset, index) => {\r\n dataset.borderColor = getColor(index).fill\r\n dataset.borderWidth = 3\r\n })\r\n\r\n clickedLines.forEach(clickedLine => {\r\n myChart.config.data.datasets[clickedLine].borderWidth = 10;\r\n myChart.config.data.datasets[clickedLine].borderColor = getColor(clickedLine).line;\r\n })\r\n }\r\n myChart.update();\r\n}\r\n\r\nfunction areClickedLinesHighlighted(clickedLines, myChart){\r\n let areAllClickedLinesHighlighted = true;\r\n clickedLines.forEach(line => {\r\n if(myChart.config.data.datasets[line].borderWidth !== 10){\r\n areAllClickedLinesHighlighted = false;\r\n }\r\n });\r\n return areAllClickedLinesHighlighted;\r\n\r\n}","import { getColor, highlightLine } from \"./highlightChartSettings\";\r\n\r\n\r\nexport function getPowerRankingChartData(powerRankings){\r\n\r\n if(powerRankings.length <= 1){\r\n return null;\r\n }\r\n\r\n let xAxisLabels = [];\r\n let rankingData = {};\r\n powerRankings.forEach((week, index) => {\r\n xAxisLabels.push(week.label);\r\n \r\n week.rankings.forEach((person, ranking) => {\r\n const readableRanking = ranking+1;\r\n const key = person.trim();\r\n if(Object.keys(rankingData).includes(key)){\r\n rankingData[key].push(readableRanking);\r\n }else{\r\n rankingData[key] = [readableRanking];\r\n }\r\n })\r\n })\r\n let defaultHighlight = parseInt(Math.random() * (Object.keys(rankingData).length - 1))\r\n const datasets = Object.keys(rankingData).map((name, index) => {\r\n const color = getColor(index);\r\n return {\r\n label: name,\r\n data: rankingData[name],\r\n // borderWidth: 1,\r\n backgroundColor: color.fill,\r\n borderColor: index === defaultHighlight ? color.line : color.fill,\r\n color: color.line,\r\n // fill: \"start\",\r\n borderWidth: index === defaultHighlight ? 10 : 2,\r\n onClick: function(event, legendItem) {\r\n highlightLine(event, this.chart, legendItem.datasetIndex)\r\n }\r\n\r\n }\r\n });\r\n\r\n return {xAxisLabels, datasets};\r\n // return formatChartJSObject(xAxisLabels, datasets)\r\n}\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nexport function getStandingsChartData(standings){\r\n let xAxisLabels;\r\n let rankingData = {};\r\n standings.regularSeason.forEach((player, index) => {\r\n\r\n if(!xAxisLabels){\r\n xAxisLabels = player.weeklyScores.map((score, index) => {\r\n return 'Week ' + (index + 1);\r\n })\r\n xAxisLabels.unshift('Start');\r\n }\r\n\r\n if(player.weeklyScores.length >= xAxisLabels.length){\r\n xAxisLabels = player.weeklyScores.map((score, index) => {\r\n return 'Week ' + (index + 1);\r\n })\r\n xAxisLabels.unshift('Start');\r\n }\r\n \r\n let runningTotal = 0;\r\n player.weeklyScores.forEach((score) => {\r\n\r\n const key = player.player.trim();\r\n if(Object.keys(rankingData).includes(key)){\r\n rankingData[key].push(runningTotal += score);\r\n }else{\r\n rankingData[key] = [0, runningTotal += score];\r\n }\r\n })\r\n\r\n\r\n })\r\n\r\n if(!Object.keys(rankingData) || Object.keys(rankingData).length === 0){\r\n return null;\r\n }\r\n\r\n let max = 0;\r\n let defaultHighlight = parseInt(Math.random() * (Object.keys(rankingData).length - 1))\r\n const datasets = Object.keys(rankingData).map((name, index) => {\r\n if(rankingData[name][rankingData[name].length-1] + 1 > max){\r\n max = rankingData[name][rankingData[name].length-1] + 1;\r\n }\r\n const color = getColor(index);\r\n return {\r\n label: name,\r\n data: rankingData[name],\r\n // borderWidth: 1,\r\n backgroundColor: color.fill,\r\n borderColor: index === defaultHighlight ? color.line : color.fill,\r\n color: color.line,\r\n // fill: \"start\",\r\n borderWidth: index === defaultHighlight ? 10 : 2,\r\n onClick: function(event, legendItem) {\r\n highlightLine(event, this.chart, legendItem.datasetIndex)\r\n }\r\n\r\n }\r\n });\r\n\r\n return {datasets, xAxisLabels, max}\r\n}\r\n","export default function _typeof(o) {\n \"@babel/helpers - typeof\";\n\n return _typeof = \"function\" == typeof Symbol && \"symbol\" == typeof Symbol.iterator ? function (o) {\n return typeof o;\n } : function (o) {\n return o && \"function\" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? \"symbol\" : typeof o;\n }, _typeof(o);\n}","import _typeof from \"./typeof.js\";\nimport toPrimitive from \"./toPrimitive.js\";\nexport default function _toPropertyKey(arg) {\n var key = toPrimitive(arg, \"string\");\n return _typeof(key) === \"symbol\" ? key : String(key);\n}","import _typeof from \"./typeof.js\";\nexport default function _toPrimitive(input, hint) {\n if (_typeof(input) !== \"object\" || input === null) return input;\n var prim = input[Symbol.toPrimitive];\n if (prim !== undefined) {\n var res = prim.call(input, hint || \"default\");\n if (_typeof(res) !== \"object\") return res;\n throw new TypeError(\"@@toPrimitive must return a primitive value.\");\n }\n return (hint === \"string\" ? String : Number)(input);\n}","import toPropertyKey from \"./toPropertyKey.js\";\nexport default function _defineProperty(obj, key, value) {\n key = toPropertyKey(key);\n if (key in obj) {\n Object.defineProperty(obj, key, {\n value: value,\n enumerable: true,\n configurable: true,\n writable: true\n });\n } else {\n obj[key] = value;\n }\n return obj;\n}","/*!\n * @kurkle/color v0.3.2\n * https://github.com/kurkle/color#readme\n * (c) 2023 Jukka Kurkela\n * Released under the MIT License\n */\nfunction round(v) {\n return v + 0.5 | 0;\n}\nconst lim = (v, l, h) => Math.max(Math.min(v, h), l);\nfunction p2b(v) {\n return lim(round(v * 2.55), 0, 255);\n}\nfunction b2p(v) {\n return lim(round(v / 2.55), 0, 100);\n}\nfunction n2b(v) {\n return lim(round(v * 255), 0, 255);\n}\nfunction b2n(v) {\n return lim(round(v / 2.55) / 100, 0, 1);\n}\nfunction n2p(v) {\n return lim(round(v * 100), 0, 100);\n}\n\nconst map$1 = {0: 0, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9, A: 10, B: 11, C: 12, D: 13, E: 14, F: 15, a: 10, b: 11, c: 12, d: 13, e: 14, f: 15};\nconst hex = [...'0123456789ABCDEF'];\nconst h1 = b => hex[b & 0xF];\nconst h2 = b => hex[(b & 0xF0) >> 4] + hex[b & 0xF];\nconst eq = b => ((b & 0xF0) >> 4) === (b & 0xF);\nconst isShort = v => eq(v.r) && eq(v.g) && eq(v.b) && eq(v.a);\nfunction hexParse(str) {\n var len = str.length;\n var ret;\n if (str[0] === '#') {\n if (len === 4 || len === 5) {\n ret = {\n r: 255 & map$1[str[1]] * 17,\n g: 255 & map$1[str[2]] * 17,\n b: 255 & map$1[str[3]] * 17,\n a: len === 5 ? map$1[str[4]] * 17 : 255\n };\n } else if (len === 7 || len === 9) {\n ret = {\n r: map$1[str[1]] << 4 | map$1[str[2]],\n g: map$1[str[3]] << 4 | map$1[str[4]],\n b: map$1[str[5]] << 4 | map$1[str[6]],\n a: len === 9 ? (map$1[str[7]] << 4 | map$1[str[8]]) : 255\n };\n }\n }\n return ret;\n}\nconst alpha = (a, f) => a < 255 ? f(a) : '';\nfunction hexString(v) {\n var f = isShort(v) ? h1 : h2;\n return v\n ? '#' + f(v.r) + f(v.g) + f(v.b) + alpha(v.a, f)\n : undefined;\n}\n\nconst HUE_RE = /^(hsla?|hwb|hsv)\\(\\s*([-+.e\\d]+)(?:deg)?[\\s,]+([-+.e\\d]+)%[\\s,]+([-+.e\\d]+)%(?:[\\s,]+([-+.e\\d]+)(%)?)?\\s*\\)$/;\nfunction hsl2rgbn(h, s, l) {\n const a = s * Math.min(l, 1 - l);\n const f = (n, k = (n + h / 30) % 12) => l - a * Math.max(Math.min(k - 3, 9 - k, 1), -1);\n return [f(0), f(8), f(4)];\n}\nfunction hsv2rgbn(h, s, v) {\n const f = (n, k = (n + h / 60) % 6) => v - v * s * Math.max(Math.min(k, 4 - k, 1), 0);\n return [f(5), f(3), f(1)];\n}\nfunction hwb2rgbn(h, w, b) {\n const rgb = hsl2rgbn(h, 1, 0.5);\n let i;\n if (w + b > 1) {\n i = 1 / (w + b);\n w *= i;\n b *= i;\n }\n for (i = 0; i < 3; i++) {\n rgb[i] *= 1 - w - b;\n rgb[i] += w;\n }\n return rgb;\n}\nfunction hueValue(r, g, b, d, max) {\n if (r === max) {\n return ((g - b) / d) + (g < b ? 6 : 0);\n }\n if (g === max) {\n return (b - r) / d + 2;\n }\n return (r - g) / d + 4;\n}\nfunction rgb2hsl(v) {\n const range = 255;\n const r = v.r / range;\n const g = v.g / range;\n const b = v.b / range;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n const l = (max + min) / 2;\n let h, s, d;\n if (max !== min) {\n d = max - min;\n s = l > 0.5 ? d / (2 - max - min) : d / (max + min);\n h = hueValue(r, g, b, d, max);\n h = h * 60 + 0.5;\n }\n return [h | 0, s || 0, l];\n}\nfunction calln(f, a, b, c) {\n return (\n Array.isArray(a)\n ? f(a[0], a[1], a[2])\n : f(a, b, c)\n ).map(n2b);\n}\nfunction hsl2rgb(h, s, l) {\n return calln(hsl2rgbn, h, s, l);\n}\nfunction hwb2rgb(h, w, b) {\n return calln(hwb2rgbn, h, w, b);\n}\nfunction hsv2rgb(h, s, v) {\n return calln(hsv2rgbn, h, s, v);\n}\nfunction hue(h) {\n return (h % 360 + 360) % 360;\n}\nfunction hueParse(str) {\n const m = HUE_RE.exec(str);\n let a = 255;\n let v;\n if (!m) {\n return;\n }\n if (m[5] !== v) {\n a = m[6] ? p2b(+m[5]) : n2b(+m[5]);\n }\n const h = hue(+m[2]);\n const p1 = +m[3] / 100;\n const p2 = +m[4] / 100;\n if (m[1] === 'hwb') {\n v = hwb2rgb(h, p1, p2);\n } else if (m[1] === 'hsv') {\n v = hsv2rgb(h, p1, p2);\n } else {\n v = hsl2rgb(h, p1, p2);\n }\n return {\n r: v[0],\n g: v[1],\n b: v[2],\n a: a\n };\n}\nfunction rotate(v, deg) {\n var h = rgb2hsl(v);\n h[0] = hue(h[0] + deg);\n h = hsl2rgb(h);\n v.r = h[0];\n v.g = h[1];\n v.b = h[2];\n}\nfunction hslString(v) {\n if (!v) {\n return;\n }\n const a = rgb2hsl(v);\n const h = a[0];\n const s = n2p(a[1]);\n const l = n2p(a[2]);\n return v.a < 255\n ? `hsla(${h}, ${s}%, ${l}%, ${b2n(v.a)})`\n : `hsl(${h}, ${s}%, ${l}%)`;\n}\n\nconst map = {\n x: 'dark',\n Z: 'light',\n Y: 're',\n X: 'blu',\n W: 'gr',\n V: 'medium',\n U: 'slate',\n A: 'ee',\n T: 'ol',\n S: 'or',\n B: 'ra',\n C: 'lateg',\n D: 'ights',\n R: 'in',\n Q: 'turquois',\n E: 'hi',\n P: 'ro',\n O: 'al',\n N: 'le',\n M: 'de',\n L: 'yello',\n F: 'en',\n K: 'ch',\n G: 'arks',\n H: 'ea',\n I: 'ightg',\n J: 'wh'\n};\nconst names$1 = {\n OiceXe: 'f0f8ff',\n antiquewEte: 'faebd7',\n aqua: 'ffff',\n aquamarRe: '7fffd4',\n azuY: 'f0ffff',\n beige: 'f5f5dc',\n bisque: 'ffe4c4',\n black: '0',\n blanKedOmond: 'ffebcd',\n Xe: 'ff',\n XeviTet: '8a2be2',\n bPwn: 'a52a2a',\n burlywood: 'deb887',\n caMtXe: '5f9ea0',\n KartYuse: '7fff00',\n KocTate: 'd2691e',\n cSO: 'ff7f50',\n cSnflowerXe: '6495ed',\n cSnsilk: 'fff8dc',\n crimson: 'dc143c',\n cyan: 'ffff',\n xXe: '8b',\n xcyan: '8b8b',\n xgTMnPd: 'b8860b',\n xWay: 'a9a9a9',\n xgYF: '6400',\n xgYy: 'a9a9a9',\n xkhaki: 'bdb76b',\n xmagFta: '8b008b',\n xTivegYF: '556b2f',\n xSange: 'ff8c00',\n xScEd: '9932cc',\n xYd: '8b0000',\n xsOmon: 'e9967a',\n xsHgYF: '8fbc8f',\n xUXe: '483d8b',\n xUWay: '2f4f4f',\n xUgYy: '2f4f4f',\n xQe: 'ced1',\n xviTet: '9400d3',\n dAppRk: 'ff1493',\n dApskyXe: 'bfff',\n dimWay: '696969',\n dimgYy: '696969',\n dodgerXe: '1e90ff',\n fiYbrick: 'b22222',\n flSOwEte: 'fffaf0',\n foYstWAn: '228b22',\n fuKsia: 'ff00ff',\n gaRsbSo: 'dcdcdc',\n ghostwEte: 'f8f8ff',\n gTd: 'ffd700',\n gTMnPd: 'daa520',\n Way: '808080',\n gYF: '8000',\n gYFLw: 'adff2f',\n gYy: '808080',\n honeyMw: 'f0fff0',\n hotpRk: 'ff69b4',\n RdianYd: 'cd5c5c',\n Rdigo: '4b0082',\n ivSy: 'fffff0',\n khaki: 'f0e68c',\n lavFMr: 'e6e6fa',\n lavFMrXsh: 'fff0f5',\n lawngYF: '7cfc00',\n NmoncEffon: 'fffacd',\n ZXe: 'add8e6',\n ZcSO: 'f08080',\n Zcyan: 'e0ffff',\n ZgTMnPdLw: 'fafad2',\n ZWay: 'd3d3d3',\n ZgYF: '90ee90',\n ZgYy: 'd3d3d3',\n ZpRk: 'ffb6c1',\n ZsOmon: 'ffa07a',\n ZsHgYF: '20b2aa',\n ZskyXe: '87cefa',\n ZUWay: '778899',\n ZUgYy: '778899',\n ZstAlXe: 'b0c4de',\n ZLw: 'ffffe0',\n lime: 'ff00',\n limegYF: '32cd32',\n lRF: 'faf0e6',\n magFta: 'ff00ff',\n maPon: '800000',\n VaquamarRe: '66cdaa',\n VXe: 'cd',\n VScEd: 'ba55d3',\n VpurpN: '9370db',\n VsHgYF: '3cb371',\n VUXe: '7b68ee',\n VsprRggYF: 'fa9a',\n VQe: '48d1cc',\n VviTetYd: 'c71585',\n midnightXe: '191970',\n mRtcYam: 'f5fffa',\n mistyPse: 'ffe4e1',\n moccasR: 'ffe4b5',\n navajowEte: 'ffdead',\n navy: '80',\n Tdlace: 'fdf5e6',\n Tive: '808000',\n TivedBb: '6b8e23',\n Sange: 'ffa500',\n SangeYd: 'ff4500',\n ScEd: 'da70d6',\n pOegTMnPd: 'eee8aa',\n pOegYF: '98fb98',\n pOeQe: 'afeeee',\n pOeviTetYd: 'db7093',\n papayawEp: 'ffefd5',\n pHKpuff: 'ffdab9',\n peru: 'cd853f',\n pRk: 'ffc0cb',\n plum: 'dda0dd',\n powMrXe: 'b0e0e6',\n purpN: '800080',\n YbeccapurpN: '663399',\n Yd: 'ff0000',\n Psybrown: 'bc8f8f',\n PyOXe: '4169e1',\n saddNbPwn: '8b4513',\n sOmon: 'fa8072',\n sandybPwn: 'f4a460',\n sHgYF: '2e8b57',\n sHshell: 'fff5ee',\n siFna: 'a0522d',\n silver: 'c0c0c0',\n skyXe: '87ceeb',\n UXe: '6a5acd',\n UWay: '708090',\n UgYy: '708090',\n snow: 'fffafa',\n sprRggYF: 'ff7f',\n stAlXe: '4682b4',\n tan: 'd2b48c',\n teO: '8080',\n tEstN: 'd8bfd8',\n tomato: 'ff6347',\n Qe: '40e0d0',\n viTet: 'ee82ee',\n JHt: 'f5deb3',\n wEte: 'ffffff',\n wEtesmoke: 'f5f5f5',\n Lw: 'ffff00',\n LwgYF: '9acd32'\n};\nfunction unpack() {\n const unpacked = {};\n const keys = Object.keys(names$1);\n const tkeys = Object.keys(map);\n let i, j, k, ok, nk;\n for (i = 0; i < keys.length; i++) {\n ok = nk = keys[i];\n for (j = 0; j < tkeys.length; j++) {\n k = tkeys[j];\n nk = nk.replace(k, map[k]);\n }\n k = parseInt(names$1[ok], 16);\n unpacked[nk] = [k >> 16 & 0xFF, k >> 8 & 0xFF, k & 0xFF];\n }\n return unpacked;\n}\n\nlet names;\nfunction nameParse(str) {\n if (!names) {\n names = unpack();\n names.transparent = [0, 0, 0, 0];\n }\n const a = names[str.toLowerCase()];\n return a && {\n r: a[0],\n g: a[1],\n b: a[2],\n a: a.length === 4 ? a[3] : 255\n };\n}\n\nconst RGB_RE = /^rgba?\\(\\s*([-+.\\d]+)(%)?[\\s,]+([-+.e\\d]+)(%)?[\\s,]+([-+.e\\d]+)(%)?(?:[\\s,/]+([-+.e\\d]+)(%)?)?\\s*\\)$/;\nfunction rgbParse(str) {\n const m = RGB_RE.exec(str);\n let a = 255;\n let r, g, b;\n if (!m) {\n return;\n }\n if (m[7] !== r) {\n const v = +m[7];\n a = m[8] ? p2b(v) : lim(v * 255, 0, 255);\n }\n r = +m[1];\n g = +m[3];\n b = +m[5];\n r = 255 & (m[2] ? p2b(r) : lim(r, 0, 255));\n g = 255 & (m[4] ? p2b(g) : lim(g, 0, 255));\n b = 255 & (m[6] ? p2b(b) : lim(b, 0, 255));\n return {\n r: r,\n g: g,\n b: b,\n a: a\n };\n}\nfunction rgbString(v) {\n return v && (\n v.a < 255\n ? `rgba(${v.r}, ${v.g}, ${v.b}, ${b2n(v.a)})`\n : `rgb(${v.r}, ${v.g}, ${v.b})`\n );\n}\n\nconst to = v => v <= 0.0031308 ? v * 12.92 : Math.pow(v, 1.0 / 2.4) * 1.055 - 0.055;\nconst from = v => v <= 0.04045 ? v / 12.92 : Math.pow((v + 0.055) / 1.055, 2.4);\nfunction interpolate(rgb1, rgb2, t) {\n const r = from(b2n(rgb1.r));\n const g = from(b2n(rgb1.g));\n const b = from(b2n(rgb1.b));\n return {\n r: n2b(to(r + t * (from(b2n(rgb2.r)) - r))),\n g: n2b(to(g + t * (from(b2n(rgb2.g)) - g))),\n b: n2b(to(b + t * (from(b2n(rgb2.b)) - b))),\n a: rgb1.a + t * (rgb2.a - rgb1.a)\n };\n}\n\nfunction modHSL(v, i, ratio) {\n if (v) {\n let tmp = rgb2hsl(v);\n tmp[i] = Math.max(0, Math.min(tmp[i] + tmp[i] * ratio, i === 0 ? 360 : 1));\n tmp = hsl2rgb(tmp);\n v.r = tmp[0];\n v.g = tmp[1];\n v.b = tmp[2];\n }\n}\nfunction clone(v, proto) {\n return v ? Object.assign(proto || {}, v) : v;\n}\nfunction fromObject(input) {\n var v = {r: 0, g: 0, b: 0, a: 255};\n if (Array.isArray(input)) {\n if (input.length >= 3) {\n v = {r: input[0], g: input[1], b: input[2], a: 255};\n if (input.length > 3) {\n v.a = n2b(input[3]);\n }\n }\n } else {\n v = clone(input, {r: 0, g: 0, b: 0, a: 1});\n v.a = n2b(v.a);\n }\n return v;\n}\nfunction functionParse(str) {\n if (str.charAt(0) === 'r') {\n return rgbParse(str);\n }\n return hueParse(str);\n}\nclass Color {\n constructor(input) {\n if (input instanceof Color) {\n return input;\n }\n const type = typeof input;\n let v;\n if (type === 'object') {\n v = fromObject(input);\n } else if (type === 'string') {\n v = hexParse(input) || nameParse(input) || functionParse(input);\n }\n this._rgb = v;\n this._valid = !!v;\n }\n get valid() {\n return this._valid;\n }\n get rgb() {\n var v = clone(this._rgb);\n if (v) {\n v.a = b2n(v.a);\n }\n return v;\n }\n set rgb(obj) {\n this._rgb = fromObject(obj);\n }\n rgbString() {\n return this._valid ? rgbString(this._rgb) : undefined;\n }\n hexString() {\n return this._valid ? hexString(this._rgb) : undefined;\n }\n hslString() {\n return this._valid ? hslString(this._rgb) : undefined;\n }\n mix(color, weight) {\n if (color) {\n const c1 = this.rgb;\n const c2 = color.rgb;\n let w2;\n const p = weight === w2 ? 0.5 : weight;\n const w = 2 * p - 1;\n const a = c1.a - c2.a;\n const w1 = ((w * a === -1 ? w : (w + a) / (1 + w * a)) + 1) / 2.0;\n w2 = 1 - w1;\n c1.r = 0xFF & w1 * c1.r + w2 * c2.r + 0.5;\n c1.g = 0xFF & w1 * c1.g + w2 * c2.g + 0.5;\n c1.b = 0xFF & w1 * c1.b + w2 * c2.b + 0.5;\n c1.a = p * c1.a + (1 - p) * c2.a;\n this.rgb = c1;\n }\n return this;\n }\n interpolate(color, t) {\n if (color) {\n this._rgb = interpolate(this._rgb, color._rgb, t);\n }\n return this;\n }\n clone() {\n return new Color(this.rgb);\n }\n alpha(a) {\n this._rgb.a = n2b(a);\n return this;\n }\n clearer(ratio) {\n const rgb = this._rgb;\n rgb.a *= 1 - ratio;\n return this;\n }\n greyscale() {\n const rgb = this._rgb;\n const val = round(rgb.r * 0.3 + rgb.g * 0.59 + rgb.b * 0.11);\n rgb.r = rgb.g = rgb.b = val;\n return this;\n }\n opaquer(ratio) {\n const rgb = this._rgb;\n rgb.a *= 1 + ratio;\n return this;\n }\n negate() {\n const v = this._rgb;\n v.r = 255 - v.r;\n v.g = 255 - v.g;\n v.b = 255 - v.b;\n return this;\n }\n lighten(ratio) {\n modHSL(this._rgb, 2, ratio);\n return this;\n }\n darken(ratio) {\n modHSL(this._rgb, 2, -ratio);\n return this;\n }\n saturate(ratio) {\n modHSL(this._rgb, 1, ratio);\n return this;\n }\n desaturate(ratio) {\n modHSL(this._rgb, 1, -ratio);\n return this;\n }\n rotate(deg) {\n rotate(this._rgb, deg);\n return this;\n }\n}\n\nfunction index_esm(input) {\n return new Color(input);\n}\n\nexport { Color, b2n, b2p, index_esm as default, hexParse, hexString, hsl2rgb, hslString, hsv2rgb, hueParse, hwb2rgb, lim, n2b, n2p, nameParse, p2b, rgb2hsl, rgbParse, rgbString, rotate, round };\n","/**\n * @namespace Chart.helpers\n */\n\nimport type {AnyObject} from '../types/basic.js';\nimport type {ActiveDataPoint, ChartEvent} from '../types/index.js';\n\n/**\n * An empty function that can be used, for example, for optional callback.\n */\nexport function noop() {\n /* noop */\n}\n\n/**\n * Returns a unique id, sequentially generated from a global variable.\n */\nexport const uid = (() => {\n let id = 0;\n return () => id++;\n})();\n\n/**\n * Returns true if `value` is neither null nor undefined, else returns false.\n * @param value - The value to test.\n * @since 2.7.0\n */\nexport function isNullOrUndef(value: unknown): value is null | undefined {\n return value === null || typeof value === 'undefined';\n}\n\n/**\n * Returns true if `value` is an array (including typed arrays), else returns false.\n * @param value - The value to test.\n * @function\n */\nexport function isArray(value: unknown): value is T[] {\n if (Array.isArray && Array.isArray(value)) {\n return true;\n }\n const type = Object.prototype.toString.call(value);\n if (type.slice(0, 7) === '[object' && type.slice(-6) === 'Array]') {\n return true;\n }\n return false;\n}\n\n/**\n * Returns true if `value` is an object (excluding null), else returns false.\n * @param value - The value to test.\n * @since 2.7.0\n */\nexport function isObject(value: unknown): value is AnyObject {\n return value !== null && Object.prototype.toString.call(value) === '[object Object]';\n}\n\n/**\n * Returns true if `value` is a finite number, else returns false\n * @param value - The value to test.\n */\nfunction isNumberFinite(value: unknown): value is number {\n return (typeof value === 'number' || value instanceof Number) && isFinite(+value);\n}\nexport {\n isNumberFinite as isFinite,\n};\n\n/**\n * Returns `value` if finite, else returns `defaultValue`.\n * @param value - The value to return if defined.\n * @param defaultValue - The value to return if `value` is not finite.\n */\nexport function finiteOrDefault(value: unknown, defaultValue: number) {\n return isNumberFinite(value) ? value : defaultValue;\n}\n\n/**\n * Returns `value` if defined, else returns `defaultValue`.\n * @param value - The value to return if defined.\n * @param defaultValue - The value to return if `value` is undefined.\n */\nexport function valueOrDefault(value: T | undefined, defaultValue: T) {\n return typeof value === 'undefined' ? defaultValue : value;\n}\n\nexport const toPercentage = (value: number | string, dimension: number) =>\n typeof value === 'string' && value.endsWith('%') ?\n parseFloat(value) / 100\n : +value / dimension;\n\nexport const toDimension = (value: number | string, dimension: number) =>\n typeof value === 'string' && value.endsWith('%') ?\n parseFloat(value) / 100 * dimension\n : +value;\n\n/**\n * Calls `fn` with the given `args` in the scope defined by `thisArg` and returns the\n * value returned by `fn`. If `fn` is not a function, this method returns undefined.\n * @param fn - The function to call.\n * @param args - The arguments with which `fn` should be called.\n * @param [thisArg] - The value of `this` provided for the call to `fn`.\n */\nexport function callback R, TA, R>(\n fn: T | undefined,\n args: unknown[],\n thisArg?: TA\n): R | undefined {\n if (fn && typeof fn.call === 'function') {\n return fn.apply(thisArg, args);\n }\n}\n\n/**\n * Note(SB) for performance sake, this method should only be used when loopable type\n * is unknown or in none intensive code (not called often and small loopable). Else\n * it's preferable to use a regular for() loop and save extra function calls.\n * @param loopable - The object or array to be iterated.\n * @param fn - The function to call for each item.\n * @param [thisArg] - The value of `this` provided for the call to `fn`.\n * @param [reverse] - If true, iterates backward on the loopable.\n */\nexport function each(\n loopable: Record,\n fn: (this: TA, v: T, i: string) => void,\n thisArg?: TA,\n reverse?: boolean\n): void;\nexport function each(\n loopable: T[],\n fn: (this: TA, v: T, i: number) => void,\n thisArg?: TA,\n reverse?: boolean\n): void;\nexport function each(\n loopable: T[] | Record,\n fn: (this: TA, v: T, i: any) => void,\n thisArg?: TA,\n reverse?: boolean\n) {\n let i: number, len: number, keys: string[];\n if (isArray(loopable)) {\n len = loopable.length;\n if (reverse) {\n for (i = len - 1; i >= 0; i--) {\n fn.call(thisArg, loopable[i], i);\n }\n } else {\n for (i = 0; i < len; i++) {\n fn.call(thisArg, loopable[i], i);\n }\n }\n } else if (isObject(loopable)) {\n keys = Object.keys(loopable);\n len = keys.length;\n for (i = 0; i < len; i++) {\n fn.call(thisArg, loopable[keys[i]], keys[i]);\n }\n }\n}\n\n/**\n * Returns true if the `a0` and `a1` arrays have the same content, else returns false.\n * @param a0 - The array to compare\n * @param a1 - The array to compare\n * @private\n */\nexport function _elementsEqual(a0: ActiveDataPoint[], a1: ActiveDataPoint[]) {\n let i: number, ilen: number, v0: ActiveDataPoint, v1: ActiveDataPoint;\n\n if (!a0 || !a1 || a0.length !== a1.length) {\n return false;\n }\n\n for (i = 0, ilen = a0.length; i < ilen; ++i) {\n v0 = a0[i];\n v1 = a1[i];\n\n if (v0.datasetIndex !== v1.datasetIndex || v0.index !== v1.index) {\n return false;\n }\n }\n\n return true;\n}\n\n/**\n * Returns a deep copy of `source` without keeping references on objects and arrays.\n * @param source - The value to clone.\n */\nexport function clone(source: T): T {\n if (isArray(source)) {\n return source.map(clone) as unknown as T;\n }\n\n if (isObject(source)) {\n const target = Object.create(null);\n const keys = Object.keys(source);\n const klen = keys.length;\n let k = 0;\n\n for (; k < klen; ++k) {\n target[keys[k]] = clone(source[keys[k]]);\n }\n\n return target;\n }\n\n return source;\n}\n\nfunction isValidKey(key: string) {\n return ['__proto__', 'prototype', 'constructor'].indexOf(key) === -1;\n}\n\n/**\n * The default merger when Chart.helpers.merge is called without merger option.\n * Note(SB): also used by mergeConfig and mergeScaleConfig as fallback.\n * @private\n */\nexport function _merger(key: string, target: AnyObject, source: AnyObject, options: AnyObject) {\n if (!isValidKey(key)) {\n return;\n }\n\n const tval = target[key];\n const sval = source[key];\n\n if (isObject(tval) && isObject(sval)) {\n // eslint-disable-next-line @typescript-eslint/no-use-before-define\n merge(tval, sval, options);\n } else {\n target[key] = clone(sval);\n }\n}\n\nexport interface MergeOptions {\n merger?: (key: string, target: AnyObject, source: AnyObject, options?: AnyObject) => void;\n}\n\n/**\n * Recursively deep copies `source` properties into `target` with the given `options`.\n * IMPORTANT: `target` is not cloned and will be updated with `source` properties.\n * @param target - The target object in which all sources are merged into.\n * @param source - Object(s) to merge into `target`.\n * @param [options] - Merging options:\n * @param [options.merger] - The merge method (key, target, source, options)\n * @returns The `target` object.\n */\nexport function merge(target: T, source: [], options?: MergeOptions): T;\nexport function merge(target: T, source: S1, options?: MergeOptions): T & S1;\nexport function merge(target: T, source: [S1], options?: MergeOptions): T & S1;\nexport function merge(target: T, source: [S1, S2], options?: MergeOptions): T & S1 & S2;\nexport function merge(target: T, source: [S1, S2, S3], options?: MergeOptions): T & S1 & S2 & S3;\nexport function merge(\n target: T,\n source: [S1, S2, S3, S4],\n options?: MergeOptions\n): T & S1 & S2 & S3 & S4;\nexport function merge(target: T, source: AnyObject[], options?: MergeOptions): AnyObject;\nexport function merge(target: T, source: AnyObject[], options?: MergeOptions): AnyObject {\n const sources = isArray(source) ? source : [source];\n const ilen = sources.length;\n\n if (!isObject(target)) {\n return target as AnyObject;\n }\n\n options = options || {};\n const merger = options.merger || _merger;\n let current: AnyObject;\n\n for (let i = 0; i < ilen; ++i) {\n current = sources[i];\n if (!isObject(current)) {\n continue;\n }\n\n const keys = Object.keys(current);\n for (let k = 0, klen = keys.length; k < klen; ++k) {\n merger(keys[k], target, current, options as AnyObject);\n }\n }\n\n return target;\n}\n\n/**\n * Recursively deep copies `source` properties into `target` *only* if not defined in target.\n * IMPORTANT: `target` is not cloned and will be updated with `source` properties.\n * @param target - The target object in which all sources are merged into.\n * @param source - Object(s) to merge into `target`.\n * @returns The `target` object.\n */\nexport function mergeIf(target: T, source: []): T;\nexport function mergeIf(target: T, source: S1): T & S1;\nexport function mergeIf(target: T, source: [S1]): T & S1;\nexport function mergeIf(target: T, source: [S1, S2]): T & S1 & S2;\nexport function mergeIf(target: T, source: [S1, S2, S3]): T & S1 & S2 & S3;\nexport function mergeIf(target: T, source: [S1, S2, S3, S4]): T & S1 & S2 & S3 & S4;\nexport function mergeIf(target: T, source: AnyObject[]): AnyObject;\nexport function mergeIf(target: T, source: AnyObject[]): AnyObject {\n // eslint-disable-next-line @typescript-eslint/no-use-before-define\n return merge(target, source, {merger: _mergerIf});\n}\n\n/**\n * Merges source[key] in target[key] only if target[key] is undefined.\n * @private\n */\nexport function _mergerIf(key: string, target: AnyObject, source: AnyObject) {\n if (!isValidKey(key)) {\n return;\n }\n\n const tval = target[key];\n const sval = source[key];\n\n if (isObject(tval) && isObject(sval)) {\n mergeIf(tval, sval);\n } else if (!Object.prototype.hasOwnProperty.call(target, key)) {\n target[key] = clone(sval);\n }\n}\n\n/**\n * @private\n */\nexport function _deprecated(scope: string, value: unknown, previous: string, current: string) {\n if (value !== undefined) {\n console.warn(scope + ': \"' + previous +\n '\" is deprecated. Please use \"' + current + '\" instead');\n }\n}\n\n// resolveObjectKey resolver cache\nconst keyResolvers = {\n // Chart.helpers.core resolveObjectKey should resolve empty key to root object\n '': v => v,\n // default resolvers\n x: o => o.x,\n y: o => o.y\n};\n\n/**\n * @private\n */\nexport function _splitKey(key: string) {\n const parts = key.split('.');\n const keys: string[] = [];\n let tmp = '';\n for (const part of parts) {\n tmp += part;\n if (tmp.endsWith('\\\\')) {\n tmp = tmp.slice(0, -1) + '.';\n } else {\n keys.push(tmp);\n tmp = '';\n }\n }\n return keys;\n}\n\nfunction _getKeyResolver(key: string) {\n const keys = _splitKey(key);\n return obj => {\n for (const k of keys) {\n if (k === '') {\n // For backward compatibility:\n // Chart.helpers.core resolveObjectKey should break at empty key\n break;\n }\n obj = obj && obj[k];\n }\n return obj;\n };\n}\n\nexport function resolveObjectKey(obj: AnyObject, key: string): any {\n const resolver = keyResolvers[key] || (keyResolvers[key] = _getKeyResolver(key));\n return resolver(obj);\n}\n\n/**\n * @private\n */\nexport function _capitalize(str: string) {\n return str.charAt(0).toUpperCase() + str.slice(1);\n}\n\n\nexport const defined = (value: unknown) => typeof value !== 'undefined';\n\nexport const isFunction = (value: unknown): value is (...args: any[]) => any => typeof value === 'function';\n\n// Adapted from https://stackoverflow.com/questions/31128855/comparing-ecma6-sets-for-equality#31129384\nexport const setsEqual = (a: Set, b: Set) => {\n if (a.size !== b.size) {\n return false;\n }\n\n for (const item of a) {\n if (!b.has(item)) {\n return false;\n }\n }\n\n return true;\n};\n\n/**\n * @param e - The event\n * @private\n */\nexport function _isClickEvent(e: ChartEvent) {\n return e.type === 'mouseup' || e.type === 'click' || e.type === 'contextmenu';\n}\n","import type {Point} from '../types/geometric.js';\nimport {isFinite as isFiniteNumber} from './helpers.core.js';\n\n/**\n * @alias Chart.helpers.math\n * @namespace\n */\n\nexport const PI = Math.PI;\nexport const TAU = 2 * PI;\nexport const PITAU = TAU + PI;\nexport const INFINITY = Number.POSITIVE_INFINITY;\nexport const RAD_PER_DEG = PI / 180;\nexport const HALF_PI = PI / 2;\nexport const QUARTER_PI = PI / 4;\nexport const TWO_THIRDS_PI = PI * 2 / 3;\n\nexport const log10 = Math.log10;\nexport const sign = Math.sign;\n\nexport function almostEquals(x: number, y: number, epsilon: number) {\n return Math.abs(x - y) < epsilon;\n}\n\n/**\n * Implementation of the nice number algorithm used in determining where axis labels will go\n */\nexport function niceNum(range: number) {\n const roundedRange = Math.round(range);\n range = almostEquals(range, roundedRange, range / 1000) ? roundedRange : range;\n const niceRange = Math.pow(10, Math.floor(log10(range)));\n const fraction = range / niceRange;\n const niceFraction = fraction <= 1 ? 1 : fraction <= 2 ? 2 : fraction <= 5 ? 5 : 10;\n return niceFraction * niceRange;\n}\n\n/**\n * Returns an array of factors sorted from 1 to sqrt(value)\n * @private\n */\nexport function _factorize(value: number) {\n const result: number[] = [];\n const sqrt = Math.sqrt(value);\n let i: number;\n\n for (i = 1; i < sqrt; i++) {\n if (value % i === 0) {\n result.push(i);\n result.push(value / i);\n }\n }\n if (sqrt === (sqrt | 0)) { // if value is a square number\n result.push(sqrt);\n }\n\n result.sort((a, b) => a - b).pop();\n return result;\n}\n\nexport function isNumber(n: unknown): n is number {\n return !isNaN(parseFloat(n as string)) && isFinite(n as number);\n}\n\nexport function almostWhole(x: number, epsilon: number) {\n const rounded = Math.round(x);\n return ((rounded - epsilon) <= x) && ((rounded + epsilon) >= x);\n}\n\n/**\n * @private\n */\nexport function _setMinAndMaxByKey(\n array: Record[],\n target: { min: number, max: number },\n property: string\n) {\n let i: number, ilen: number, value: number;\n\n for (i = 0, ilen = array.length; i < ilen; i++) {\n value = array[i][property];\n if (!isNaN(value)) {\n target.min = Math.min(target.min, value);\n target.max = Math.max(target.max, value);\n }\n }\n}\n\nexport function toRadians(degrees: number) {\n return degrees * (PI / 180);\n}\n\nexport function toDegrees(radians: number) {\n return radians * (180 / PI);\n}\n\n/**\n * Returns the number of decimal places\n * i.e. the number of digits after the decimal point, of the value of this Number.\n * @param x - A number.\n * @returns The number of decimal places.\n * @private\n */\nexport function _decimalPlaces(x: number) {\n if (!isFiniteNumber(x)) {\n return;\n }\n let e = 1;\n let p = 0;\n while (Math.round(x * e) / e !== x) {\n e *= 10;\n p++;\n }\n return p;\n}\n\n// Gets the angle from vertical upright to the point about a centre.\nexport function getAngleFromPoint(\n centrePoint: Point,\n anglePoint: Point\n) {\n const distanceFromXCenter = anglePoint.x - centrePoint.x;\n const distanceFromYCenter = anglePoint.y - centrePoint.y;\n const radialDistanceFromCenter = Math.sqrt(distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter);\n\n let angle = Math.atan2(distanceFromYCenter, distanceFromXCenter);\n\n if (angle < (-0.5 * PI)) {\n angle += TAU; // make sure the returned angle is in the range of (-PI/2, 3PI/2]\n }\n\n return {\n angle,\n distance: radialDistanceFromCenter\n };\n}\n\nexport function distanceBetweenPoints(pt1: Point, pt2: Point) {\n return Math.sqrt(Math.pow(pt2.x - pt1.x, 2) + Math.pow(pt2.y - pt1.y, 2));\n}\n\n/**\n * Shortest distance between angles, in either direction.\n * @private\n */\nexport function _angleDiff(a: number, b: number) {\n return (a - b + PITAU) % TAU - PI;\n}\n\n/**\n * Normalize angle to be between 0 and 2*PI\n * @private\n */\nexport function _normalizeAngle(a: number) {\n return (a % TAU + TAU) % TAU;\n}\n\n/**\n * @private\n */\nexport function _angleBetween(angle: number, start: number, end: number, sameAngleIsFullCircle?: boolean) {\n const a = _normalizeAngle(angle);\n const s = _normalizeAngle(start);\n const e = _normalizeAngle(end);\n const angleToStart = _normalizeAngle(s - a);\n const angleToEnd = _normalizeAngle(e - a);\n const startToAngle = _normalizeAngle(a - s);\n const endToAngle = _normalizeAngle(a - e);\n return a === s || a === e || (sameAngleIsFullCircle && s === e)\n || (angleToStart > angleToEnd && startToAngle < endToAngle);\n}\n\n/**\n * Limit `value` between `min` and `max`\n * @param value\n * @param min\n * @param max\n * @private\n */\nexport function _limitValue(value: number, min: number, max: number) {\n return Math.max(min, Math.min(max, value));\n}\n\n/**\n * @param {number} value\n * @private\n */\nexport function _int16Range(value: number) {\n return _limitValue(value, -32768, 32767);\n}\n\n/**\n * @param value\n * @param start\n * @param end\n * @param [epsilon]\n * @private\n */\nexport function _isBetween(value: number, start: number, end: number, epsilon = 1e-6) {\n return value >= Math.min(start, end) - epsilon && value <= Math.max(start, end) + epsilon;\n}\n","import {_capitalize} from './helpers.core.js';\n\n/**\n * Binary search\n * @param table - the table search. must be sorted!\n * @param value - value to find\n * @param cmp\n * @private\n */\nexport function _lookup(\n table: number[],\n value: number,\n cmp?: (value: number) => boolean\n): {lo: number, hi: number};\nexport function _lookup(\n table: T[],\n value: number,\n cmp: (value: number) => boolean\n): {lo: number, hi: number};\nexport function _lookup(\n table: unknown[],\n value: number,\n cmp?: (value: number) => boolean\n) {\n cmp = cmp || ((index) => table[index] < value);\n let hi = table.length - 1;\n let lo = 0;\n let mid: number;\n\n while (hi - lo > 1) {\n mid = (lo + hi) >> 1;\n if (cmp(mid)) {\n lo = mid;\n } else {\n hi = mid;\n }\n }\n\n return {lo, hi};\n}\n\n/**\n * Binary search\n * @param table - the table search. must be sorted!\n * @param key - property name for the value in each entry\n * @param value - value to find\n * @param last - lookup last index\n * @private\n */\nexport const _lookupByKey = (\n table: Record[],\n key: string,\n value: number,\n last?: boolean\n) =>\n _lookup(table, value, last\n ? index => {\n const ti = table[index][key];\n return ti < value || ti === value && table[index + 1][key] === value;\n }\n : index => table[index][key] < value);\n\n/**\n * Reverse binary search\n * @param table - the table search. must be sorted!\n * @param key - property name for the value in each entry\n * @param value - value to find\n * @private\n */\nexport const _rlookupByKey = (\n table: Record[],\n key: string,\n value: number\n) =>\n _lookup(table, value, index => table[index][key] >= value);\n\n/**\n * Return subset of `values` between `min` and `max` inclusive.\n * Values are assumed to be in sorted order.\n * @param values - sorted array of values\n * @param min - min value\n * @param max - max value\n */\nexport function _filterBetween(values: number[], min: number, max: number) {\n let start = 0;\n let end = values.length;\n\n while (start < end && values[start] < min) {\n start++;\n }\n while (end > start && values[end - 1] > max) {\n end--;\n }\n\n return start > 0 || end < values.length\n ? values.slice(start, end)\n : values;\n}\n\nconst arrayEvents = ['push', 'pop', 'shift', 'splice', 'unshift'] as const;\n\nexport interface ArrayListener {\n _onDataPush?(...item: T[]): void;\n _onDataPop?(): void;\n _onDataShift?(): void;\n _onDataSplice?(index: number, deleteCount: number, ...items: T[]): void;\n _onDataUnshift?(...item: T[]): void;\n}\n\n/**\n * Hooks the array methods that add or remove values ('push', pop', 'shift', 'splice',\n * 'unshift') and notify the listener AFTER the array has been altered. Listeners are\n * called on the '_onData*' callbacks (e.g. _onDataPush, etc.) with same arguments.\n */\nexport function listenArrayEvents(array: T[], listener: ArrayListener): void;\nexport function listenArrayEvents(array, listener) {\n if (array._chartjs) {\n array._chartjs.listeners.push(listener);\n return;\n }\n\n Object.defineProperty(array, '_chartjs', {\n configurable: true,\n enumerable: false,\n value: {\n listeners: [listener]\n }\n });\n\n arrayEvents.forEach((key) => {\n const method = '_onData' + _capitalize(key);\n const base = array[key];\n\n Object.defineProperty(array, key, {\n configurable: true,\n enumerable: false,\n value(...args) {\n const res = base.apply(this, args);\n\n array._chartjs.listeners.forEach((object) => {\n if (typeof object[method] === 'function') {\n object[method](...args);\n }\n });\n\n return res;\n }\n });\n });\n}\n\n\n/**\n * Removes the given array event listener and cleanup extra attached properties (such as\n * the _chartjs stub and overridden methods) if array doesn't have any more listeners.\n */\nexport function unlistenArrayEvents(array: T[], listener: ArrayListener): void;\nexport function unlistenArrayEvents(array, listener) {\n const stub = array._chartjs;\n if (!stub) {\n return;\n }\n\n const listeners = stub.listeners;\n const index = listeners.indexOf(listener);\n if (index !== -1) {\n listeners.splice(index, 1);\n }\n\n if (listeners.length > 0) {\n return;\n }\n\n arrayEvents.forEach((key) => {\n delete array[key];\n });\n\n delete array._chartjs;\n}\n\n/**\n * @param items\n */\nexport function _arrayUnique(items: T[]) {\n const set = new Set(items);\n\n if (set.size === items.length) {\n return items;\n }\n\n return Array.from(set);\n}\n","import type {ChartMeta, PointElement} from '../types/index.js';\n\nimport {_limitValue} from './helpers.math.js';\nimport {_lookupByKey} from './helpers.collection.js';\n\nexport function fontString(pixelSize: number, fontStyle: string, fontFamily: string) {\n return fontStyle + ' ' + pixelSize + 'px ' + fontFamily;\n}\n\n/**\n* Request animation polyfill\n*/\nexport const requestAnimFrame = (function() {\n if (typeof window === 'undefined') {\n return function(callback) {\n return callback();\n };\n }\n return window.requestAnimationFrame;\n}());\n\n/**\n * Throttles calling `fn` once per animation frame\n * Latest arguments are used on the actual call\n */\nexport function throttled>(\n fn: (...args: TArgs) => void,\n thisArg: any,\n) {\n let argsToUse = [] as TArgs;\n let ticking = false;\n\n return function(...args: TArgs) {\n // Save the args for use later\n argsToUse = args;\n if (!ticking) {\n ticking = true;\n requestAnimFrame.call(window, () => {\n ticking = false;\n fn.apply(thisArg, argsToUse);\n });\n }\n };\n}\n\n/**\n * Debounces calling `fn` for `delay` ms\n */\nexport function debounce>(fn: (...args: TArgs) => void, delay: number) {\n let timeout;\n return function(...args: TArgs) {\n if (delay) {\n clearTimeout(timeout);\n timeout = setTimeout(fn, delay, args);\n } else {\n fn.apply(this, args);\n }\n return delay;\n };\n}\n\n/**\n * Converts 'start' to 'left', 'end' to 'right' and others to 'center'\n * @private\n */\nexport const _toLeftRightCenter = (align: 'start' | 'end' | 'center') => align === 'start' ? 'left' : align === 'end' ? 'right' : 'center';\n\n/**\n * Returns `start`, `end` or `(start + end) / 2` depending on `align`. Defaults to `center`\n * @private\n */\nexport const _alignStartEnd = (align: 'start' | 'end' | 'center', start: number, end: number) => align === 'start' ? start : align === 'end' ? end : (start + end) / 2;\n\n/**\n * Returns `left`, `right` or `(left + right) / 2` depending on `align`. Defaults to `left`\n * @private\n */\nexport const _textX = (align: 'left' | 'right' | 'center', left: number, right: number, rtl: boolean) => {\n const check = rtl ? 'left' : 'right';\n return align === check ? right : align === 'center' ? (left + right) / 2 : left;\n};\n\n/**\n * Return start and count of visible points.\n * @private\n */\nexport function _getStartAndCountOfVisiblePoints(meta: ChartMeta<'line' | 'scatter'>, points: PointElement[], animationsDisabled: boolean) {\n const pointCount = points.length;\n\n let start = 0;\n let count = pointCount;\n\n if (meta._sorted) {\n const {iScale, _parsed} = meta;\n const axis = iScale.axis;\n const {min, max, minDefined, maxDefined} = iScale.getUserBounds();\n\n if (minDefined) {\n start = _limitValue(Math.min(\n // @ts-expect-error Need to type _parsed\n _lookupByKey(_parsed, axis, min).lo,\n // @ts-expect-error Need to fix types on _lookupByKey\n animationsDisabled ? pointCount : _lookupByKey(points, axis, iScale.getPixelForValue(min)).lo),\n 0, pointCount - 1);\n }\n if (maxDefined) {\n count = _limitValue(Math.max(\n // @ts-expect-error Need to type _parsed\n _lookupByKey(_parsed, iScale.axis, max, true).hi + 1,\n // @ts-expect-error Need to fix types on _lookupByKey\n animationsDisabled ? 0 : _lookupByKey(points, axis, iScale.getPixelForValue(max), true).hi + 1),\n start, pointCount) - start;\n } else {\n count = pointCount - start;\n }\n }\n\n return {start, count};\n}\n\n/**\n * Checks if the scale ranges have changed.\n * @param {object} meta - dataset meta.\n * @returns {boolean}\n * @private\n */\nexport function _scaleRangesChanged(meta) {\n const {xScale, yScale, _scaleRanges} = meta;\n const newRanges = {\n xmin: xScale.min,\n xmax: xScale.max,\n ymin: yScale.min,\n ymax: yScale.max\n };\n if (!_scaleRanges) {\n meta._scaleRanges = newRanges;\n return true;\n }\n const changed = _scaleRanges.xmin !== xScale.min\n\t\t|| _scaleRanges.xmax !== xScale.max\n\t\t|| _scaleRanges.ymin !== yScale.min\n\t\t|| _scaleRanges.ymax !== yScale.max;\n\n Object.assign(_scaleRanges, newRanges);\n return changed;\n}\n","import {PI, TAU, HALF_PI} from './helpers.math.js';\n\nconst atEdge = (t: number) => t === 0 || t === 1;\nconst elasticIn = (t: number, s: number, p: number) => -(Math.pow(2, 10 * (t -= 1)) * Math.sin((t - s) * TAU / p));\nconst elasticOut = (t: number, s: number, p: number) => Math.pow(2, -10 * t) * Math.sin((t - s) * TAU / p) + 1;\n\n/**\n * Easing functions adapted from Robert Penner's easing equations.\n * @namespace Chart.helpers.easing.effects\n * @see http://www.robertpenner.com/easing/\n */\nconst effects = {\n linear: (t: number) => t,\n\n easeInQuad: (t: number) => t * t,\n\n easeOutQuad: (t: number) => -t * (t - 2),\n\n easeInOutQuad: (t: number) => ((t /= 0.5) < 1)\n ? 0.5 * t * t\n : -0.5 * ((--t) * (t - 2) - 1),\n\n easeInCubic: (t: number) => t * t * t,\n\n easeOutCubic: (t: number) => (t -= 1) * t * t + 1,\n\n easeInOutCubic: (t: number) => ((t /= 0.5) < 1)\n ? 0.5 * t * t * t\n : 0.5 * ((t -= 2) * t * t + 2),\n\n easeInQuart: (t: number) => t * t * t * t,\n\n easeOutQuart: (t: number) => -((t -= 1) * t * t * t - 1),\n\n easeInOutQuart: (t: number) => ((t /= 0.5) < 1)\n ? 0.5 * t * t * t * t\n : -0.5 * ((t -= 2) * t * t * t - 2),\n\n easeInQuint: (t: number) => t * t * t * t * t,\n\n easeOutQuint: (t: number) => (t -= 1) * t * t * t * t + 1,\n\n easeInOutQuint: (t: number) => ((t /= 0.5) < 1)\n ? 0.5 * t * t * t * t * t\n : 0.5 * ((t -= 2) * t * t * t * t + 2),\n\n easeInSine: (t: number) => -Math.cos(t * HALF_PI) + 1,\n\n easeOutSine: (t: number) => Math.sin(t * HALF_PI),\n\n easeInOutSine: (t: number) => -0.5 * (Math.cos(PI * t) - 1),\n\n easeInExpo: (t: number) => (t === 0) ? 0 : Math.pow(2, 10 * (t - 1)),\n\n easeOutExpo: (t: number) => (t === 1) ? 1 : -Math.pow(2, -10 * t) + 1,\n\n easeInOutExpo: (t: number) => atEdge(t) ? t : t < 0.5\n ? 0.5 * Math.pow(2, 10 * (t * 2 - 1))\n : 0.5 * (-Math.pow(2, -10 * (t * 2 - 1)) + 2),\n\n easeInCirc: (t: number) => (t >= 1) ? t : -(Math.sqrt(1 - t * t) - 1),\n\n easeOutCirc: (t: number) => Math.sqrt(1 - (t -= 1) * t),\n\n easeInOutCirc: (t: number) => ((t /= 0.5) < 1)\n ? -0.5 * (Math.sqrt(1 - t * t) - 1)\n : 0.5 * (Math.sqrt(1 - (t -= 2) * t) + 1),\n\n easeInElastic: (t: number) => atEdge(t) ? t : elasticIn(t, 0.075, 0.3),\n\n easeOutElastic: (t: number) => atEdge(t) ? t : elasticOut(t, 0.075, 0.3),\n\n easeInOutElastic(t: number) {\n const s = 0.1125;\n const p = 0.45;\n return atEdge(t) ? t :\n t < 0.5\n ? 0.5 * elasticIn(t * 2, s, p)\n : 0.5 + 0.5 * elasticOut(t * 2 - 1, s, p);\n },\n\n easeInBack(t: number) {\n const s = 1.70158;\n return t * t * ((s + 1) * t - s);\n },\n\n easeOutBack(t: number) {\n const s = 1.70158;\n return (t -= 1) * t * ((s + 1) * t + s) + 1;\n },\n\n easeInOutBack(t: number) {\n let s = 1.70158;\n if ((t /= 0.5) < 1) {\n return 0.5 * (t * t * (((s *= (1.525)) + 1) * t - s));\n }\n return 0.5 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2);\n },\n\n easeInBounce: (t: number) => 1 - effects.easeOutBounce(1 - t),\n\n easeOutBounce(t: number) {\n const m = 7.5625;\n const d = 2.75;\n if (t < (1 / d)) {\n return m * t * t;\n }\n if (t < (2 / d)) {\n return m * (t -= (1.5 / d)) * t + 0.75;\n }\n if (t < (2.5 / d)) {\n return m * (t -= (2.25 / d)) * t + 0.9375;\n }\n return m * (t -= (2.625 / d)) * t + 0.984375;\n },\n\n easeInOutBounce: (t: number) => (t < 0.5)\n ? effects.easeInBounce(t * 2) * 0.5\n : effects.easeOutBounce(t * 2 - 1) * 0.5 + 0.5,\n} as const;\n\nexport type EasingFunction = keyof typeof effects\n\nexport default effects;\n","import {Color} from '@kurkle/color';\n\nexport function isPatternOrGradient(value: unknown): value is CanvasPattern | CanvasGradient {\n if (value && typeof value === 'object') {\n const type = value.toString();\n return type === '[object CanvasPattern]' || type === '[object CanvasGradient]';\n }\n\n return false;\n}\n\nexport function color(value: CanvasGradient): CanvasGradient;\nexport function color(value: CanvasPattern): CanvasPattern;\nexport function color(\n value:\n | string\n | { r: number; g: number; b: number; a: number }\n | [number, number, number]\n | [number, number, number, number]\n): Color;\nexport function color(value) {\n return isPatternOrGradient(value) ? value : new Color(value);\n}\n\nexport function getHoverColor(value: CanvasGradient): CanvasGradient;\nexport function getHoverColor(value: CanvasPattern): CanvasPattern;\nexport function getHoverColor(value: string): string;\nexport function getHoverColor(value) {\n return isPatternOrGradient(value)\n ? value\n : new Color(value).saturate(0.5).darken(0.1).hexString();\n}\n","const numbers = ['x', 'y', 'borderWidth', 'radius', 'tension'];\nconst colors = ['color', 'borderColor', 'backgroundColor'];\n\nexport function applyAnimationsDefaults(defaults) {\n defaults.set('animation', {\n delay: undefined,\n duration: 1000,\n easing: 'easeOutQuart',\n fn: undefined,\n from: undefined,\n loop: undefined,\n to: undefined,\n type: undefined,\n });\n\n defaults.describe('animation', {\n _fallback: false,\n _indexable: false,\n _scriptable: (name) => name !== 'onProgress' && name !== 'onComplete' && name !== 'fn',\n });\n\n defaults.set('animations', {\n colors: {\n type: 'color',\n properties: colors\n },\n numbers: {\n type: 'number',\n properties: numbers\n },\n });\n\n defaults.describe('animations', {\n _fallback: 'animation',\n });\n\n defaults.set('transitions', {\n active: {\n animation: {\n duration: 400\n }\n },\n resize: {\n animation: {\n duration: 0\n }\n },\n show: {\n animations: {\n colors: {\n from: 'transparent'\n },\n visible: {\n type: 'boolean',\n duration: 0 // show immediately\n },\n }\n },\n hide: {\n animations: {\n colors: {\n to: 'transparent'\n },\n visible: {\n type: 'boolean',\n easing: 'linear',\n fn: v => v | 0 // for keeping the dataset visible all the way through the animation\n },\n }\n }\n });\n}\n","\nconst intlCache = new Map();\n\nfunction getNumberFormat(locale: string, options?: Intl.NumberFormatOptions) {\n options = options || {};\n const cacheKey = locale + JSON.stringify(options);\n let formatter = intlCache.get(cacheKey);\n if (!formatter) {\n formatter = new Intl.NumberFormat(locale, options);\n intlCache.set(cacheKey, formatter);\n }\n return formatter;\n}\n\nexport function formatNumber(num: number, locale: string, options?: Intl.NumberFormatOptions) {\n return getNumberFormat(locale, options).format(num);\n}\n","import {isArray} from '../helpers/helpers.core.js';\nimport {formatNumber} from '../helpers/helpers.intl.js';\nimport {log10} from '../helpers/helpers.math.js';\n\n/**\n * Namespace to hold formatters for different types of ticks\n * @namespace Chart.Ticks.formatters\n */\nconst formatters = {\n /**\n * Formatter for value labels\n * @method Chart.Ticks.formatters.values\n * @param value the value to display\n * @return {string|string[]} the label to display\n */\n values(value) {\n return isArray(value) ? /** @type {string[]} */ (value) : '' + value;\n },\n\n /**\n * Formatter for numeric ticks\n * @method Chart.Ticks.formatters.numeric\n * @param tickValue {number} the value to be formatted\n * @param index {number} the position of the tickValue parameter in the ticks array\n * @param ticks {object[]} the list of ticks being converted\n * @return {string} string representation of the tickValue parameter\n */\n numeric(tickValue, index, ticks) {\n if (tickValue === 0) {\n return '0'; // never show decimal places for 0\n }\n\n const locale = this.chart.options.locale;\n let notation;\n let delta = tickValue; // This is used when there are less than 2 ticks as the tick interval.\n\n if (ticks.length > 1) {\n // all ticks are small or there huge numbers; use scientific notation\n const maxTick = Math.max(Math.abs(ticks[0].value), Math.abs(ticks[ticks.length - 1].value));\n if (maxTick < 1e-4 || maxTick > 1e+15) {\n notation = 'scientific';\n }\n\n delta = calculateDelta(tickValue, ticks);\n }\n\n const logDelta = log10(Math.abs(delta));\n\n // When datasets have values approaching Number.MAX_VALUE, the tick calculations might result in\n // infinity and eventually NaN. Passing NaN for minimumFractionDigits or maximumFractionDigits\n // will make the number formatter throw. So instead we check for isNaN and use a fallback value.\n //\n // toFixed has a max of 20 decimal places\n const numDecimal = isNaN(logDelta) ? 1 : Math.max(Math.min(-1 * Math.floor(logDelta), 20), 0);\n\n const options = {notation, minimumFractionDigits: numDecimal, maximumFractionDigits: numDecimal};\n Object.assign(options, this.options.ticks.format);\n\n return formatNumber(tickValue, locale, options);\n },\n\n\n /**\n * Formatter for logarithmic ticks\n * @method Chart.Ticks.formatters.logarithmic\n * @param tickValue {number} the value to be formatted\n * @param index {number} the position of the tickValue parameter in the ticks array\n * @param ticks {object[]} the list of ticks being converted\n * @return {string} string representation of the tickValue parameter\n */\n logarithmic(tickValue, index, ticks) {\n if (tickValue === 0) {\n return '0';\n }\n const remain = ticks[index].significand || (tickValue / (Math.pow(10, Math.floor(log10(tickValue)))));\n if ([1, 2, 3, 5, 10, 15].includes(remain) || index > 0.8 * ticks.length) {\n return formatters.numeric.call(this, tickValue, index, ticks);\n }\n return '';\n }\n\n};\n\n\nfunction calculateDelta(tickValue, ticks) {\n // Figure out how many digits to show\n // The space between the first two ticks might be smaller than normal spacing\n let delta = ticks.length > 3 ? ticks[2].value - ticks[1].value : ticks[1].value - ticks[0].value;\n\n // If we have a number like 2.5 as the delta, figure out how many decimal places we need\n if (Math.abs(delta) >= 1 && tickValue !== Math.floor(tickValue)) {\n // not an integer\n delta = tickValue - Math.floor(tickValue);\n }\n return delta;\n}\n\n/**\n * Namespace to hold static tick generation functions\n * @namespace Chart.Ticks\n */\nexport default {formatters};\n","import {getHoverColor} from '../helpers/helpers.color.js';\nimport {isObject, merge, valueOrDefault} from '../helpers/helpers.core.js';\nimport {applyAnimationsDefaults} from './core.animations.defaults.js';\nimport {applyLayoutsDefaults} from './core.layouts.defaults.js';\nimport {applyScaleDefaults} from './core.scale.defaults.js';\n\nexport const overrides = Object.create(null);\nexport const descriptors = Object.create(null);\n\n/**\n * @param {object} node\n * @param {string} key\n * @return {object}\n */\nfunction getScope(node, key) {\n if (!key) {\n return node;\n }\n const keys = key.split('.');\n for (let i = 0, n = keys.length; i < n; ++i) {\n const k = keys[i];\n node = node[k] || (node[k] = Object.create(null));\n }\n return node;\n}\n\nfunction set(root, scope, values) {\n if (typeof scope === 'string') {\n return merge(getScope(root, scope), values);\n }\n return merge(getScope(root, ''), scope);\n}\n\n/**\n * Please use the module's default export which provides a singleton instance\n * Note: class is exported for typedoc\n */\nexport class Defaults {\n constructor(_descriptors, _appliers) {\n this.animation = undefined;\n this.backgroundColor = 'rgba(0,0,0,0.1)';\n this.borderColor = 'rgba(0,0,0,0.1)';\n this.color = '#666';\n this.datasets = {};\n this.devicePixelRatio = (context) => context.chart.platform.getDevicePixelRatio();\n this.elements = {};\n this.events = [\n 'mousemove',\n 'mouseout',\n 'click',\n 'touchstart',\n 'touchmove'\n ];\n this.font = {\n family: \"'Helvetica Neue', 'Helvetica', 'Arial', sans-serif\",\n size: 12,\n style: 'normal',\n lineHeight: 1.2,\n weight: null\n };\n this.hover = {};\n this.hoverBackgroundColor = (ctx, options) => getHoverColor(options.backgroundColor);\n this.hoverBorderColor = (ctx, options) => getHoverColor(options.borderColor);\n this.hoverColor = (ctx, options) => getHoverColor(options.color);\n this.indexAxis = 'x';\n this.interaction = {\n mode: 'nearest',\n intersect: true,\n includeInvisible: false\n };\n this.maintainAspectRatio = true;\n this.onHover = null;\n this.onClick = null;\n this.parsing = true;\n this.plugins = {};\n this.responsive = true;\n this.scale = undefined;\n this.scales = {};\n this.showLine = true;\n this.drawActiveElementsOnTop = true;\n\n this.describe(_descriptors);\n this.apply(_appliers);\n }\n\n /**\n\t * @param {string|object} scope\n\t * @param {object} [values]\n\t */\n set(scope, values) {\n return set(this, scope, values);\n }\n\n /**\n\t * @param {string} scope\n\t */\n get(scope) {\n return getScope(this, scope);\n }\n\n /**\n\t * @param {string|object} scope\n\t * @param {object} [values]\n\t */\n describe(scope, values) {\n return set(descriptors, scope, values);\n }\n\n override(scope, values) {\n return set(overrides, scope, values);\n }\n\n /**\n\t * Routes the named defaults to fallback to another scope/name.\n\t * This routing is useful when those target values, like defaults.color, are changed runtime.\n\t * If the values would be copied, the runtime change would not take effect. By routing, the\n\t * fallback is evaluated at each access, so its always up to date.\n\t *\n\t * Example:\n\t *\n\t * \tdefaults.route('elements.arc', 'backgroundColor', '', 'color')\n\t * - reads the backgroundColor from defaults.color when undefined locally\n\t *\n\t * @param {string} scope Scope this route applies to.\n\t * @param {string} name Property name that should be routed to different namespace when not defined here.\n\t * @param {string} targetScope The namespace where those properties should be routed to.\n\t * Empty string ('') is the root of defaults.\n\t * @param {string} targetName The target name in the target scope the property should be routed to.\n\t */\n route(scope, name, targetScope, targetName) {\n const scopeObject = getScope(this, scope);\n const targetScopeObject = getScope(this, targetScope);\n const privateName = '_' + name;\n\n Object.defineProperties(scopeObject, {\n // A private property is defined to hold the actual value, when this property is set in its scope (set in the setter)\n [privateName]: {\n value: scopeObject[name],\n writable: true\n },\n // The actual property is defined as getter/setter so we can do the routing when value is not locally set.\n [name]: {\n enumerable: true,\n get() {\n const local = this[privateName];\n const target = targetScopeObject[targetName];\n if (isObject(local)) {\n return Object.assign({}, target, local);\n }\n return valueOrDefault(local, target);\n },\n set(value) {\n this[privateName] = value;\n }\n }\n });\n }\n\n apply(appliers) {\n appliers.forEach((apply) => apply(this));\n }\n}\n\n// singleton instance\nexport default /* #__PURE__ */ new Defaults({\n _scriptable: (name) => !name.startsWith('on'),\n _indexable: (name) => name !== 'events',\n hover: {\n _fallback: 'interaction'\n },\n interaction: {\n _scriptable: false,\n _indexable: false,\n }\n}, [applyAnimationsDefaults, applyLayoutsDefaults, applyScaleDefaults]);\n","export function applyLayoutsDefaults(defaults) {\n defaults.set('layout', {\n autoPadding: true,\n padding: {\n top: 0,\n right: 0,\n bottom: 0,\n left: 0\n }\n });\n}\n","import Ticks from './core.ticks.js';\n\nexport function applyScaleDefaults(defaults) {\n defaults.set('scale', {\n display: true,\n offset: false,\n reverse: false,\n beginAtZero: false,\n\n /**\n * Scale boundary strategy (bypassed by min/max time options)\n * - `data`: make sure data are fully visible, ticks outside are removed\n * - `ticks`: make sure ticks are fully visible, data outside are truncated\n * @see https://github.com/chartjs/Chart.js/pull/4556\n * @since 3.0.0\n */\n bounds: 'ticks',\n\n clip: true,\n\n /**\n * Addition grace added to max and reduced from min data value.\n * @since 3.0.0\n */\n grace: 0,\n\n // grid line settings\n grid: {\n display: true,\n lineWidth: 1,\n drawOnChartArea: true,\n drawTicks: true,\n tickLength: 8,\n tickWidth: (_ctx, options) => options.lineWidth,\n tickColor: (_ctx, options) => options.color,\n offset: false,\n },\n\n border: {\n display: true,\n dash: [],\n dashOffset: 0.0,\n width: 1\n },\n\n // scale title\n title: {\n // display property\n display: false,\n\n // actual label\n text: '',\n\n // top/bottom padding\n padding: {\n top: 4,\n bottom: 4\n }\n },\n\n // label settings\n ticks: {\n minRotation: 0,\n maxRotation: 50,\n mirror: false,\n textStrokeWidth: 0,\n textStrokeColor: '',\n padding: 3,\n display: true,\n autoSkip: true,\n autoSkipPadding: 3,\n labelOffset: 0,\n // We pass through arrays to be rendered as multiline labels, we convert Others to strings here.\n callback: Ticks.formatters.values,\n minor: {},\n major: {},\n align: 'center',\n crossAlign: 'near',\n\n showLabelBackdrop: false,\n backdropColor: 'rgba(255, 255, 255, 0.75)',\n backdropPadding: 2,\n }\n });\n\n defaults.route('scale.ticks', 'color', '', 'color');\n defaults.route('scale.grid', 'color', '', 'borderColor');\n defaults.route('scale.border', 'color', '', 'borderColor');\n defaults.route('scale.title', 'color', '', 'color');\n\n defaults.describe('scale', {\n _fallback: false,\n _scriptable: (name) => !name.startsWith('before') && !name.startsWith('after') && name !== 'callback' && name !== 'parser',\n _indexable: (name) => name !== 'borderDash' && name !== 'tickBorderDash' && name !== 'dash',\n });\n\n defaults.describe('scales', {\n _fallback: 'scale',\n });\n\n defaults.describe('scale.ticks', {\n _scriptable: (name) => name !== 'backdropPadding' && name !== 'callback',\n _indexable: (name) => name !== 'backdropPadding',\n });\n}\n","import type {\n Chart,\n Point,\n FontSpec,\n CanvasFontSpec,\n PointStyle,\n RenderTextOpts,\n BackdropOptions\n} from '../types/index.js';\nimport type {\n TRBL,\n SplinePoint,\n RoundedRect,\n TRBLCorners\n} from '../types/geometric.js';\nimport {isArray, isNullOrUndef} from './helpers.core.js';\nimport {PI, TAU, HALF_PI, QUARTER_PI, TWO_THIRDS_PI, RAD_PER_DEG} from './helpers.math.js';\n\n/**\n * Converts the given font object into a CSS font string.\n * @param font - A font object.\n * @return The CSS font string. See https://developer.mozilla.org/en-US/docs/Web/CSS/font\n * @private\n */\nexport function toFontString(font: FontSpec) {\n if (!font || isNullOrUndef(font.size) || isNullOrUndef(font.family)) {\n return null;\n }\n\n return (font.style ? font.style + ' ' : '')\n\t\t+ (font.weight ? font.weight + ' ' : '')\n\t\t+ font.size + 'px '\n\t\t+ font.family;\n}\n\n/**\n * @private\n */\nexport function _measureText(\n ctx: CanvasRenderingContext2D,\n data: Record,\n gc: string[],\n longest: number,\n string: string\n) {\n let textWidth = data[string];\n if (!textWidth) {\n textWidth = data[string] = ctx.measureText(string).width;\n gc.push(string);\n }\n if (textWidth > longest) {\n longest = textWidth;\n }\n return longest;\n}\n\ntype Thing = string | undefined | null\ntype Things = (Thing | Thing[])[]\n\n/**\n * @private\n */\n// eslint-disable-next-line complexity\nexport function _longestText(\n ctx: CanvasRenderingContext2D,\n font: string,\n arrayOfThings: Things,\n cache?: {data?: Record, garbageCollect?: string[], font?: string}\n) {\n cache = cache || {};\n let data = cache.data = cache.data || {};\n let gc = cache.garbageCollect = cache.garbageCollect || [];\n\n if (cache.font !== font) {\n data = cache.data = {};\n gc = cache.garbageCollect = [];\n cache.font = font;\n }\n\n ctx.save();\n\n ctx.font = font;\n let longest = 0;\n const ilen = arrayOfThings.length;\n let i: number, j: number, jlen: number, thing: Thing | Thing[], nestedThing: Thing | Thing[];\n for (i = 0; i < ilen; i++) {\n thing = arrayOfThings[i];\n\n // Undefined strings and arrays should not be measured\n if (thing !== undefined && thing !== null && !isArray(thing)) {\n longest = _measureText(ctx, data, gc, longest, thing);\n } else if (isArray(thing)) {\n // if it is an array lets measure each element\n // to do maybe simplify this function a bit so we can do this more recursively?\n for (j = 0, jlen = thing.length; j < jlen; j++) {\n nestedThing = thing[j];\n // Undefined strings and arrays should not be measured\n if (nestedThing !== undefined && nestedThing !== null && !isArray(nestedThing)) {\n longest = _measureText(ctx, data, gc, longest, nestedThing);\n }\n }\n }\n }\n\n ctx.restore();\n\n const gcLen = gc.length / 2;\n if (gcLen > arrayOfThings.length) {\n for (i = 0; i < gcLen; i++) {\n delete data[gc[i]];\n }\n gc.splice(0, gcLen);\n }\n return longest;\n}\n\n/**\n * Returns the aligned pixel value to avoid anti-aliasing blur\n * @param chart - The chart instance.\n * @param pixel - A pixel value.\n * @param width - The width of the element.\n * @returns The aligned pixel value.\n * @private\n */\nexport function _alignPixel(chart: Chart, pixel: number, width: number) {\n const devicePixelRatio = chart.currentDevicePixelRatio;\n const halfWidth = width !== 0 ? Math.max(width / 2, 0.5) : 0;\n return Math.round((pixel - halfWidth) * devicePixelRatio) / devicePixelRatio + halfWidth;\n}\n\n/**\n * Clears the entire canvas.\n */\nexport function clearCanvas(canvas: HTMLCanvasElement, ctx?: CanvasRenderingContext2D) {\n ctx = ctx || canvas.getContext('2d');\n\n ctx.save();\n // canvas.width and canvas.height do not consider the canvas transform,\n // while clearRect does\n ctx.resetTransform();\n ctx.clearRect(0, 0, canvas.width, canvas.height);\n ctx.restore();\n}\n\nexport interface DrawPointOptions {\n pointStyle: PointStyle;\n rotation?: number;\n radius: number;\n borderWidth: number;\n}\n\nexport function drawPoint(\n ctx: CanvasRenderingContext2D,\n options: DrawPointOptions,\n x: number,\n y: number\n) {\n // eslint-disable-next-line @typescript-eslint/no-use-before-define\n drawPointLegend(ctx, options, x, y, null);\n}\n\n// eslint-disable-next-line complexity\nexport function drawPointLegend(\n ctx: CanvasRenderingContext2D,\n options: DrawPointOptions,\n x: number,\n y: number,\n w: number\n) {\n let type: string, xOffset: number, yOffset: number, size: number, cornerRadius: number, width: number, xOffsetW: number, yOffsetW: number;\n const style = options.pointStyle;\n const rotation = options.rotation;\n const radius = options.radius;\n let rad = (rotation || 0) * RAD_PER_DEG;\n\n if (style && typeof style === 'object') {\n type = style.toString();\n if (type === '[object HTMLImageElement]' || type === '[object HTMLCanvasElement]') {\n ctx.save();\n ctx.translate(x, y);\n ctx.rotate(rad);\n ctx.drawImage(style, -style.width / 2, -style.height / 2, style.width, style.height);\n ctx.restore();\n return;\n }\n }\n\n if (isNaN(radius) || radius <= 0) {\n return;\n }\n\n ctx.beginPath();\n\n switch (style) {\n // Default includes circle\n default:\n if (w) {\n ctx.ellipse(x, y, w / 2, radius, 0, 0, TAU);\n } else {\n ctx.arc(x, y, radius, 0, TAU);\n }\n ctx.closePath();\n break;\n case 'triangle':\n width = w ? w / 2 : radius;\n ctx.moveTo(x + Math.sin(rad) * width, y - Math.cos(rad) * radius);\n rad += TWO_THIRDS_PI;\n ctx.lineTo(x + Math.sin(rad) * width, y - Math.cos(rad) * radius);\n rad += TWO_THIRDS_PI;\n ctx.lineTo(x + Math.sin(rad) * width, y - Math.cos(rad) * radius);\n ctx.closePath();\n break;\n case 'rectRounded':\n // NOTE: the rounded rect implementation changed to use `arc` instead of\n // `quadraticCurveTo` since it generates better results when rect is\n // almost a circle. 0.516 (instead of 0.5) produces results with visually\n // closer proportion to the previous impl and it is inscribed in the\n // circle with `radius`. For more details, see the following PRs:\n // https://github.com/chartjs/Chart.js/issues/5597\n // https://github.com/chartjs/Chart.js/issues/5858\n cornerRadius = radius * 0.516;\n size = radius - cornerRadius;\n xOffset = Math.cos(rad + QUARTER_PI) * size;\n xOffsetW = Math.cos(rad + QUARTER_PI) * (w ? w / 2 - cornerRadius : size);\n yOffset = Math.sin(rad + QUARTER_PI) * size;\n yOffsetW = Math.sin(rad + QUARTER_PI) * (w ? w / 2 - cornerRadius : size);\n ctx.arc(x - xOffsetW, y - yOffset, cornerRadius, rad - PI, rad - HALF_PI);\n ctx.arc(x + yOffsetW, y - xOffset, cornerRadius, rad - HALF_PI, rad);\n ctx.arc(x + xOffsetW, y + yOffset, cornerRadius, rad, rad + HALF_PI);\n ctx.arc(x - yOffsetW, y + xOffset, cornerRadius, rad + HALF_PI, rad + PI);\n ctx.closePath();\n break;\n case 'rect':\n if (!rotation) {\n size = Math.SQRT1_2 * radius;\n width = w ? w / 2 : size;\n ctx.rect(x - width, y - size, 2 * width, 2 * size);\n break;\n }\n rad += QUARTER_PI;\n /* falls through */\n case 'rectRot':\n xOffsetW = Math.cos(rad) * (w ? w / 2 : radius);\n xOffset = Math.cos(rad) * radius;\n yOffset = Math.sin(rad) * radius;\n yOffsetW = Math.sin(rad) * (w ? w / 2 : radius);\n ctx.moveTo(x - xOffsetW, y - yOffset);\n ctx.lineTo(x + yOffsetW, y - xOffset);\n ctx.lineTo(x + xOffsetW, y + yOffset);\n ctx.lineTo(x - yOffsetW, y + xOffset);\n ctx.closePath();\n break;\n case 'crossRot':\n rad += QUARTER_PI;\n /* falls through */\n case 'cross':\n xOffsetW = Math.cos(rad) * (w ? w / 2 : radius);\n xOffset = Math.cos(rad) * radius;\n yOffset = Math.sin(rad) * radius;\n yOffsetW = Math.sin(rad) * (w ? w / 2 : radius);\n ctx.moveTo(x - xOffsetW, y - yOffset);\n ctx.lineTo(x + xOffsetW, y + yOffset);\n ctx.moveTo(x + yOffsetW, y - xOffset);\n ctx.lineTo(x - yOffsetW, y + xOffset);\n break;\n case 'star':\n xOffsetW = Math.cos(rad) * (w ? w / 2 : radius);\n xOffset = Math.cos(rad) * radius;\n yOffset = Math.sin(rad) * radius;\n yOffsetW = Math.sin(rad) * (w ? w / 2 : radius);\n ctx.moveTo(x - xOffsetW, y - yOffset);\n ctx.lineTo(x + xOffsetW, y + yOffset);\n ctx.moveTo(x + yOffsetW, y - xOffset);\n ctx.lineTo(x - yOffsetW, y + xOffset);\n rad += QUARTER_PI;\n xOffsetW = Math.cos(rad) * (w ? w / 2 : radius);\n xOffset = Math.cos(rad) * radius;\n yOffset = Math.sin(rad) * radius;\n yOffsetW = Math.sin(rad) * (w ? w / 2 : radius);\n ctx.moveTo(x - xOffsetW, y - yOffset);\n ctx.lineTo(x + xOffsetW, y + yOffset);\n ctx.moveTo(x + yOffsetW, y - xOffset);\n ctx.lineTo(x - yOffsetW, y + xOffset);\n break;\n case 'line':\n xOffset = w ? w / 2 : Math.cos(rad) * radius;\n yOffset = Math.sin(rad) * radius;\n ctx.moveTo(x - xOffset, y - yOffset);\n ctx.lineTo(x + xOffset, y + yOffset);\n break;\n case 'dash':\n ctx.moveTo(x, y);\n ctx.lineTo(x + Math.cos(rad) * (w ? w / 2 : radius), y + Math.sin(rad) * radius);\n break;\n case false:\n ctx.closePath();\n break;\n }\n\n ctx.fill();\n if (options.borderWidth > 0) {\n ctx.stroke();\n }\n}\n\n/**\n * Returns true if the point is inside the rectangle\n * @param point - The point to test\n * @param area - The rectangle\n * @param margin - allowed margin\n * @private\n */\nexport function _isPointInArea(\n point: Point,\n area: TRBL,\n margin?: number\n) {\n margin = margin || 0.5; // margin - default is to match rounded decimals\n\n return !area || (point && point.x > area.left - margin && point.x < area.right + margin &&\n\t\tpoint.y > area.top - margin && point.y < area.bottom + margin);\n}\n\nexport function clipArea(ctx: CanvasRenderingContext2D, area: TRBL) {\n ctx.save();\n ctx.beginPath();\n ctx.rect(area.left, area.top, area.right - area.left, area.bottom - area.top);\n ctx.clip();\n}\n\nexport function unclipArea(ctx: CanvasRenderingContext2D) {\n ctx.restore();\n}\n\n/**\n * @private\n */\nexport function _steppedLineTo(\n ctx: CanvasRenderingContext2D,\n previous: Point,\n target: Point,\n flip?: boolean,\n mode?: string\n) {\n if (!previous) {\n return ctx.lineTo(target.x, target.y);\n }\n if (mode === 'middle') {\n const midpoint = (previous.x + target.x) / 2.0;\n ctx.lineTo(midpoint, previous.y);\n ctx.lineTo(midpoint, target.y);\n } else if (mode === 'after' !== !!flip) {\n ctx.lineTo(previous.x, target.y);\n } else {\n ctx.lineTo(target.x, previous.y);\n }\n ctx.lineTo(target.x, target.y);\n}\n\n/**\n * @private\n */\nexport function _bezierCurveTo(\n ctx: CanvasRenderingContext2D,\n previous: SplinePoint,\n target: SplinePoint,\n flip?: boolean\n) {\n if (!previous) {\n return ctx.lineTo(target.x, target.y);\n }\n ctx.bezierCurveTo(\n flip ? previous.cp1x : previous.cp2x,\n flip ? previous.cp1y : previous.cp2y,\n flip ? target.cp2x : target.cp1x,\n flip ? target.cp2y : target.cp1y,\n target.x,\n target.y);\n}\n\nfunction setRenderOpts(ctx: CanvasRenderingContext2D, opts: RenderTextOpts) {\n if (opts.translation) {\n ctx.translate(opts.translation[0], opts.translation[1]);\n }\n\n if (!isNullOrUndef(opts.rotation)) {\n ctx.rotate(opts.rotation);\n }\n\n if (opts.color) {\n ctx.fillStyle = opts.color;\n }\n\n if (opts.textAlign) {\n ctx.textAlign = opts.textAlign;\n }\n\n if (opts.textBaseline) {\n ctx.textBaseline = opts.textBaseline;\n }\n}\n\nfunction decorateText(\n ctx: CanvasRenderingContext2D,\n x: number,\n y: number,\n line: string,\n opts: RenderTextOpts\n) {\n if (opts.strikethrough || opts.underline) {\n /**\n * Now that IE11 support has been dropped, we can use more\n * of the TextMetrics object. The actual bounding boxes\n * are unflagged in Chrome, Firefox, Edge, and Safari so they\n * can be safely used.\n * See https://developer.mozilla.org/en-US/docs/Web/API/TextMetrics#Browser_compatibility\n */\n const metrics = ctx.measureText(line);\n const left = x - metrics.actualBoundingBoxLeft;\n const right = x + metrics.actualBoundingBoxRight;\n const top = y - metrics.actualBoundingBoxAscent;\n const bottom = y + metrics.actualBoundingBoxDescent;\n const yDecoration = opts.strikethrough ? (top + bottom) / 2 : bottom;\n\n ctx.strokeStyle = ctx.fillStyle;\n ctx.beginPath();\n ctx.lineWidth = opts.decorationWidth || 2;\n ctx.moveTo(left, yDecoration);\n ctx.lineTo(right, yDecoration);\n ctx.stroke();\n }\n}\n\nfunction drawBackdrop(ctx: CanvasRenderingContext2D, opts: BackdropOptions) {\n const oldColor = ctx.fillStyle;\n\n ctx.fillStyle = opts.color as string;\n ctx.fillRect(opts.left, opts.top, opts.width, opts.height);\n ctx.fillStyle = oldColor;\n}\n\n/**\n * Render text onto the canvas\n */\nexport function renderText(\n ctx: CanvasRenderingContext2D,\n text: string | string[],\n x: number,\n y: number,\n font: CanvasFontSpec,\n opts: RenderTextOpts = {}\n) {\n const lines = isArray(text) ? text : [text];\n const stroke = opts.strokeWidth > 0 && opts.strokeColor !== '';\n let i: number, line: string;\n\n ctx.save();\n ctx.font = font.string;\n setRenderOpts(ctx, opts);\n\n for (i = 0; i < lines.length; ++i) {\n line = lines[i];\n\n if (opts.backdrop) {\n drawBackdrop(ctx, opts.backdrop);\n }\n\n if (stroke) {\n if (opts.strokeColor) {\n ctx.strokeStyle = opts.strokeColor;\n }\n\n if (!isNullOrUndef(opts.strokeWidth)) {\n ctx.lineWidth = opts.strokeWidth;\n }\n\n ctx.strokeText(line, x, y, opts.maxWidth);\n }\n\n ctx.fillText(line, x, y, opts.maxWidth);\n decorateText(ctx, x, y, line, opts);\n\n y += Number(font.lineHeight);\n }\n\n ctx.restore();\n}\n\n/**\n * Add a path of a rectangle with rounded corners to the current sub-path\n * @param ctx - Context\n * @param rect - Bounding rect\n */\nexport function addRoundedRectPath(\n ctx: CanvasRenderingContext2D,\n rect: RoundedRect & { radius: TRBLCorners }\n) {\n const {x, y, w, h, radius} = rect;\n\n // top left arc\n ctx.arc(x + radius.topLeft, y + radius.topLeft, radius.topLeft, 1.5 * PI, PI, true);\n\n // line from top left to bottom left\n ctx.lineTo(x, y + h - radius.bottomLeft);\n\n // bottom left arc\n ctx.arc(x + radius.bottomLeft, y + h - radius.bottomLeft, radius.bottomLeft, PI, HALF_PI, true);\n\n // line from bottom left to bottom right\n ctx.lineTo(x + w - radius.bottomRight, y + h);\n\n // bottom right arc\n ctx.arc(x + w - radius.bottomRight, y + h - radius.bottomRight, radius.bottomRight, HALF_PI, 0, true);\n\n // line from bottom right to top right\n ctx.lineTo(x + w, y + radius.topRight);\n\n // top right arc\n ctx.arc(x + w - radius.topRight, y + radius.topRight, radius.topRight, 0, -HALF_PI, true);\n\n // line from top right to top left\n ctx.lineTo(x + radius.topLeft, y);\n}\n","import defaults from '../core/core.defaults.js';\nimport {isArray, isObject, toDimension, valueOrDefault} from './helpers.core.js';\nimport {toFontString} from './helpers.canvas.js';\nimport type {ChartArea, FontSpec, Point} from '../types/index.js';\nimport type {TRBL, TRBLCorners} from '../types/geometric.js';\n\nconst LINE_HEIGHT = /^(normal|(\\d+(?:\\.\\d+)?)(px|em|%)?)$/;\nconst FONT_STYLE = /^(normal|italic|initial|inherit|unset|(oblique( -?[0-9]?[0-9]deg)?))$/;\n\n/**\n * @alias Chart.helpers.options\n * @namespace\n */\n/**\n * Converts the given line height `value` in pixels for a specific font `size`.\n * @param value - The lineHeight to parse (eg. 1.6, '14px', '75%', '1.6em').\n * @param size - The font size (in pixels) used to resolve relative `value`.\n * @returns The effective line height in pixels (size * 1.2 if value is invalid).\n * @see https://developer.mozilla.org/en-US/docs/Web/CSS/line-height\n * @since 2.7.0\n */\nexport function toLineHeight(value: number | string, size: number): number {\n const matches = ('' + value).match(LINE_HEIGHT);\n if (!matches || matches[1] === 'normal') {\n return size * 1.2;\n }\n\n value = +matches[2];\n\n switch (matches[3]) {\n case 'px':\n return value;\n case '%':\n value /= 100;\n break;\n default:\n break;\n }\n\n return size * value;\n}\n\nconst numberOrZero = (v: unknown) => +v || 0;\n\n/**\n * @param value\n * @param props\n */\nexport function _readValueToProps(value: number | Record, props: K[]): Record;\nexport function _readValueToProps(value: number | Record, props: Record): Record;\nexport function _readValueToProps(value: number | Record, props: string[] | Record) {\n const ret = {};\n const objProps = isObject(props);\n const keys = objProps ? Object.keys(props) : props;\n const read = isObject(value)\n ? objProps\n ? prop => valueOrDefault(value[prop], value[props[prop]])\n : prop => value[prop]\n : () => value;\n\n for (const prop of keys) {\n ret[prop] = numberOrZero(read(prop));\n }\n return ret;\n}\n\n/**\n * Converts the given value into a TRBL object.\n * @param value - If a number, set the value to all TRBL component,\n * else, if an object, use defined properties and sets undefined ones to 0.\n * x / y are shorthands for same value for left/right and top/bottom.\n * @returns The padding values (top, right, bottom, left)\n * @since 3.0.0\n */\nexport function toTRBL(value: number | TRBL | Point) {\n return _readValueToProps(value, {top: 'y', right: 'x', bottom: 'y', left: 'x'});\n}\n\n/**\n * Converts the given value into a TRBL corners object (similar with css border-radius).\n * @param value - If a number, set the value to all TRBL corner components,\n * else, if an object, use defined properties and sets undefined ones to 0.\n * @returns The TRBL corner values (topLeft, topRight, bottomLeft, bottomRight)\n * @since 3.0.0\n */\nexport function toTRBLCorners(value: number | TRBLCorners) {\n return _readValueToProps(value, ['topLeft', 'topRight', 'bottomLeft', 'bottomRight']);\n}\n\n/**\n * Converts the given value into a padding object with pre-computed width/height.\n * @param value - If a number, set the value to all TRBL component,\n * else, if an object, use defined properties and sets undefined ones to 0.\n * x / y are shorthands for same value for left/right and top/bottom.\n * @returns The padding values (top, right, bottom, left, width, height)\n * @since 2.7.0\n */\nexport function toPadding(value?: number | TRBL): ChartArea {\n const obj = toTRBL(value) as ChartArea;\n\n obj.width = obj.left + obj.right;\n obj.height = obj.top + obj.bottom;\n\n return obj;\n}\n\n/**\n * Parses font options and returns the font object.\n * @param options - A object that contains font options to be parsed.\n * @param fallback - A object that contains fallback font options.\n * @return The font object.\n * @private\n */\n\nexport function toFont(options: Partial, fallback?: Partial) {\n options = options || {};\n fallback = fallback || defaults.font as FontSpec;\n\n let size = valueOrDefault(options.size, fallback.size);\n\n if (typeof size === 'string') {\n size = parseInt(size, 10);\n }\n let style = valueOrDefault(options.style, fallback.style);\n if (style && !('' + style).match(FONT_STYLE)) {\n console.warn('Invalid font style specified: \"' + style + '\"');\n style = undefined;\n }\n\n const font = {\n family: valueOrDefault(options.family, fallback.family),\n lineHeight: toLineHeight(valueOrDefault(options.lineHeight, fallback.lineHeight), size),\n size,\n style,\n weight: valueOrDefault(options.weight, fallback.weight),\n string: ''\n };\n\n font.string = toFontString(font);\n return font;\n}\n\n/**\n * Evaluates the given `inputs` sequentially and returns the first defined value.\n * @param inputs - An array of values, falling back to the last value.\n * @param context - If defined and the current value is a function, the value\n * is called with `context` as first argument and the result becomes the new input.\n * @param index - If defined and the current value is an array, the value\n * at `index` become the new input.\n * @param info - object to return information about resolution in\n * @param info.cacheable - Will be set to `false` if option is not cacheable.\n * @since 2.7.0\n */\nexport function resolve(inputs: Array, context?: object, index?: number, info?: { cacheable: boolean }) {\n let cacheable = true;\n let i: number, ilen: number, value: unknown;\n\n for (i = 0, ilen = inputs.length; i < ilen; ++i) {\n value = inputs[i];\n if (value === undefined) {\n continue;\n }\n if (context !== undefined && typeof value === 'function') {\n value = value(context);\n cacheable = false;\n }\n if (index !== undefined && isArray(value)) {\n value = value[index % value.length];\n cacheable = false;\n }\n if (value !== undefined) {\n if (info && !cacheable) {\n info.cacheable = false;\n }\n return value;\n }\n }\n}\n\n/**\n * @param minmax\n * @param grace\n * @param beginAtZero\n * @private\n */\nexport function _addGrace(minmax: { min: number; max: number; }, grace: number | string, beginAtZero: boolean) {\n const {min, max} = minmax;\n const change = toDimension(grace, (max - min) / 2);\n const keepZero = (value: number, add: number) => beginAtZero && value === 0 ? 0 : value + add;\n return {\n min: keepZero(min, -Math.abs(change)),\n max: keepZero(max, change)\n };\n}\n\n/**\n * Create a context inheriting parentContext\n * @param parentContext\n * @param context\n * @returns\n */\nexport function createContext(parentContext: null, context: T): T;\nexport function createContext(parentContext: P, context: T): P & T;\nexport function createContext(parentContext: object, context: object) {\n return Object.assign(Object.create(parentContext), context);\n}\n","/* eslint-disable @typescript-eslint/no-use-before-define */\nimport type {AnyObject} from '../types/basic.js';\nimport type {ChartMeta} from '../types/index.js';\nimport type {\n ResolverObjectKey,\n ResolverCache,\n ResolverProxy,\n DescriptorDefaults,\n Descriptor,\n ContextCache,\n ContextProxy\n} from './helpers.config.types.js';\nimport {isArray, isFunction, isObject, resolveObjectKey, _capitalize} from './helpers.core.js';\n\nexport * from './helpers.config.types.js';\n\n/**\n * Creates a Proxy for resolving raw values for options.\n * @param scopes - The option scopes to look for values, in resolution order\n * @param prefixes - The prefixes for values, in resolution order.\n * @param rootScopes - The root option scopes\n * @param fallback - Parent scopes fallback\n * @param getTarget - callback for getting the target for changed values\n * @returns Proxy\n * @private\n */\nexport function _createResolver<\n T extends AnyObject[] = AnyObject[],\n R extends AnyObject[] = T\n>(\n scopes: T,\n prefixes = [''],\n rootScopes?: R,\n fallback?: ResolverObjectKey,\n getTarget = () => scopes[0]\n) {\n const finalRootScopes = rootScopes || scopes;\n if (typeof fallback === 'undefined') {\n fallback = _resolve('_fallback', scopes);\n }\n const cache: ResolverCache = {\n [Symbol.toStringTag]: 'Object',\n _cacheable: true,\n _scopes: scopes,\n _rootScopes: finalRootScopes,\n _fallback: fallback,\n _getTarget: getTarget,\n override: (scope: AnyObject) => _createResolver([scope, ...scopes], prefixes, finalRootScopes, fallback),\n };\n return new Proxy(cache, {\n /**\n * A trap for the delete operator.\n */\n deleteProperty(target, prop: string) {\n delete target[prop]; // remove from cache\n delete target._keys; // remove cached keys\n delete scopes[0][prop]; // remove from top level scope\n return true;\n },\n\n /**\n * A trap for getting property values.\n */\n get(target, prop: string) {\n return _cached(target, prop,\n () => _resolveWithPrefixes(prop, prefixes, scopes, target));\n },\n\n /**\n * A trap for Object.getOwnPropertyDescriptor.\n * Also used by Object.hasOwnProperty.\n */\n getOwnPropertyDescriptor(target, prop) {\n return Reflect.getOwnPropertyDescriptor(target._scopes[0], prop);\n },\n\n /**\n * A trap for Object.getPrototypeOf.\n */\n getPrototypeOf() {\n return Reflect.getPrototypeOf(scopes[0]);\n },\n\n /**\n * A trap for the in operator.\n */\n has(target, prop: string) {\n return getKeysFromAllScopes(target).includes(prop);\n },\n\n /**\n * A trap for Object.getOwnPropertyNames and Object.getOwnPropertySymbols.\n */\n ownKeys(target) {\n return getKeysFromAllScopes(target);\n },\n\n /**\n * A trap for setting property values.\n */\n set(target, prop: string, value) {\n const storage = target._storage || (target._storage = getTarget());\n target[prop] = storage[prop] = value; // set to top level scope + cache\n delete target._keys; // remove cached keys\n return true;\n }\n }) as ResolverProxy;\n}\n\n/**\n * Returns an Proxy for resolving option values with context.\n * @param proxy - The Proxy returned by `_createResolver`\n * @param context - Context object for scriptable/indexable options\n * @param subProxy - The proxy provided for scriptable options\n * @param descriptorDefaults - Defaults for descriptors\n * @private\n */\nexport function _attachContext<\n T extends AnyObject[] = AnyObject[],\n R extends AnyObject[] = T\n>(\n proxy: ResolverProxy,\n context: AnyObject,\n subProxy?: ResolverProxy,\n descriptorDefaults?: DescriptorDefaults\n) {\n const cache: ContextCache = {\n _cacheable: false,\n _proxy: proxy,\n _context: context,\n _subProxy: subProxy,\n _stack: new Set(),\n _descriptors: _descriptors(proxy, descriptorDefaults),\n setContext: (ctx: AnyObject) => _attachContext(proxy, ctx, subProxy, descriptorDefaults),\n override: (scope: AnyObject) => _attachContext(proxy.override(scope), context, subProxy, descriptorDefaults)\n };\n return new Proxy(cache, {\n /**\n * A trap for the delete operator.\n */\n deleteProperty(target, prop) {\n delete target[prop]; // remove from cache\n delete proxy[prop]; // remove from proxy\n return true;\n },\n\n /**\n * A trap for getting property values.\n */\n get(target, prop: string, receiver) {\n return _cached(target, prop,\n () => _resolveWithContext(target, prop, receiver));\n },\n\n /**\n * A trap for Object.getOwnPropertyDescriptor.\n * Also used by Object.hasOwnProperty.\n */\n getOwnPropertyDescriptor(target, prop) {\n return target._descriptors.allKeys\n ? Reflect.has(proxy, prop) ? {enumerable: true, configurable: true} : undefined\n : Reflect.getOwnPropertyDescriptor(proxy, prop);\n },\n\n /**\n * A trap for Object.getPrototypeOf.\n */\n getPrototypeOf() {\n return Reflect.getPrototypeOf(proxy);\n },\n\n /**\n * A trap for the in operator.\n */\n has(target, prop) {\n return Reflect.has(proxy, prop);\n },\n\n /**\n * A trap for Object.getOwnPropertyNames and Object.getOwnPropertySymbols.\n */\n ownKeys() {\n return Reflect.ownKeys(proxy);\n },\n\n /**\n * A trap for setting property values.\n */\n set(target, prop, value) {\n proxy[prop] = value; // set to proxy\n delete target[prop]; // remove from cache\n return true;\n }\n }) as ContextProxy;\n}\n\n/**\n * @private\n */\nexport function _descriptors(\n proxy: ResolverCache,\n defaults: DescriptorDefaults = {scriptable: true, indexable: true}\n): Descriptor {\n const {_scriptable = defaults.scriptable, _indexable = defaults.indexable, _allKeys = defaults.allKeys} = proxy;\n return {\n allKeys: _allKeys,\n scriptable: _scriptable,\n indexable: _indexable,\n isScriptable: isFunction(_scriptable) ? _scriptable : () => _scriptable,\n isIndexable: isFunction(_indexable) ? _indexable : () => _indexable\n };\n}\n\nconst readKey = (prefix: string, name: string) => prefix ? prefix + _capitalize(name) : name;\nconst needsSubResolver = (prop: string, value: unknown) => isObject(value) && prop !== 'adapters' &&\n (Object.getPrototypeOf(value) === null || value.constructor === Object);\n\nfunction _cached(\n target: AnyObject,\n prop: string,\n resolve: () => unknown\n) {\n if (Object.prototype.hasOwnProperty.call(target, prop)) {\n return target[prop];\n }\n\n const value = resolve();\n // cache the resolved value\n target[prop] = value;\n return value;\n}\n\nfunction _resolveWithContext(\n target: ContextCache,\n prop: string,\n receiver: AnyObject\n) {\n const {_proxy, _context, _subProxy, _descriptors: descriptors} = target;\n let value = _proxy[prop]; // resolve from proxy\n\n // resolve with context\n if (isFunction(value) && descriptors.isScriptable(prop)) {\n value = _resolveScriptable(prop, value, target, receiver);\n }\n if (isArray(value) && value.length) {\n value = _resolveArray(prop, value, target, descriptors.isIndexable);\n }\n if (needsSubResolver(prop, value)) {\n // if the resolved value is an object, create a sub resolver for it\n value = _attachContext(value, _context, _subProxy && _subProxy[prop], descriptors);\n }\n return value;\n}\n\nfunction _resolveScriptable(\n prop: string,\n getValue: (ctx: AnyObject, sub: AnyObject) => unknown,\n target: ContextCache,\n receiver: AnyObject\n) {\n const {_proxy, _context, _subProxy, _stack} = target;\n if (_stack.has(prop)) {\n throw new Error('Recursion detected: ' + Array.from(_stack).join('->') + '->' + prop);\n }\n _stack.add(prop);\n let value = getValue(_context, _subProxy || receiver);\n _stack.delete(prop);\n if (needsSubResolver(prop, value)) {\n // When scriptable option returns an object, create a resolver on that.\n value = createSubResolver(_proxy._scopes, _proxy, prop, value);\n }\n return value;\n}\n\nfunction _resolveArray(\n prop: string,\n value: unknown[],\n target: ContextCache,\n isIndexable: (key: string) => boolean\n) {\n const {_proxy, _context, _subProxy, _descriptors: descriptors} = target;\n\n if (typeof _context.index !== 'undefined' && isIndexable(prop)) {\n return value[_context.index % value.length];\n } else if (isObject(value[0])) {\n // Array of objects, return array or resolvers\n const arr = value;\n const scopes = _proxy._scopes.filter(s => s !== arr);\n value = [];\n for (const item of arr) {\n const resolver = createSubResolver(scopes, _proxy, prop, item);\n value.push(_attachContext(resolver, _context, _subProxy && _subProxy[prop], descriptors));\n }\n }\n return value;\n}\n\nfunction resolveFallback(\n fallback: ResolverObjectKey | ((prop: ResolverObjectKey, value: unknown) => ResolverObjectKey),\n prop: ResolverObjectKey,\n value: unknown\n) {\n return isFunction(fallback) ? fallback(prop, value) : fallback;\n}\n\nconst getScope = (key: ResolverObjectKey, parent: AnyObject) => key === true ? parent\n : typeof key === 'string' ? resolveObjectKey(parent, key) : undefined;\n\nfunction addScopes(\n set: Set,\n parentScopes: AnyObject[],\n key: ResolverObjectKey,\n parentFallback: ResolverObjectKey,\n value: unknown\n) {\n for (const parent of parentScopes) {\n const scope = getScope(key, parent);\n if (scope) {\n set.add(scope);\n const fallback = resolveFallback(scope._fallback, key, value);\n if (typeof fallback !== 'undefined' && fallback !== key && fallback !== parentFallback) {\n // When we reach the descriptor that defines a new _fallback, return that.\n // The fallback will resume to that new scope.\n return fallback;\n }\n } else if (scope === false && typeof parentFallback !== 'undefined' && key !== parentFallback) {\n // Fallback to `false` results to `false`, when falling back to different key.\n // For example `interaction` from `hover` or `plugins.tooltip` and `animation` from `animations`\n return null;\n }\n }\n return false;\n}\n\nfunction createSubResolver(\n parentScopes: AnyObject[],\n resolver: ResolverCache,\n prop: ResolverObjectKey,\n value: unknown\n) {\n const rootScopes = resolver._rootScopes;\n const fallback = resolveFallback(resolver._fallback, prop, value);\n const allScopes = [...parentScopes, ...rootScopes];\n const set = new Set();\n set.add(value);\n let key = addScopesFromKey(set, allScopes, prop, fallback || prop, value);\n if (key === null) {\n return false;\n }\n if (typeof fallback !== 'undefined' && fallback !== prop) {\n key = addScopesFromKey(set, allScopes, fallback, key, value);\n if (key === null) {\n return false;\n }\n }\n return _createResolver(Array.from(set), [''], rootScopes, fallback,\n () => subGetTarget(resolver, prop as string, value));\n}\n\nfunction addScopesFromKey(\n set: Set,\n allScopes: AnyObject[],\n key: ResolverObjectKey,\n fallback: ResolverObjectKey,\n item: unknown\n) {\n while (key) {\n key = addScopes(set, allScopes, key, fallback, item);\n }\n return key;\n}\n\nfunction subGetTarget(\n resolver: ResolverCache,\n prop: string,\n value: unknown\n) {\n const parent = resolver._getTarget();\n if (!(prop in parent)) {\n parent[prop] = {};\n }\n const target = parent[prop];\n if (isArray(target) && isObject(value)) {\n // For array of objects, the object is used to store updated values\n return value;\n }\n return target || {};\n}\n\nfunction _resolveWithPrefixes(\n prop: string,\n prefixes: string[],\n scopes: AnyObject[],\n proxy: ResolverProxy\n) {\n let value: unknown;\n for (const prefix of prefixes) {\n value = _resolve(readKey(prefix, prop), scopes);\n if (typeof value !== 'undefined') {\n return needsSubResolver(prop, value)\n ? createSubResolver(scopes, proxy, prop, value)\n : value;\n }\n }\n}\n\nfunction _resolve(key: string, scopes: AnyObject[]) {\n for (const scope of scopes) {\n if (!scope) {\n continue;\n }\n const value = scope[key];\n if (typeof value !== 'undefined') {\n return value;\n }\n }\n}\n\nfunction getKeysFromAllScopes(target: ResolverCache) {\n let keys = target._keys;\n if (!keys) {\n keys = target._keys = resolveKeysFromAllScopes(target._scopes);\n }\n return keys;\n}\n\nfunction resolveKeysFromAllScopes(scopes: AnyObject[]) {\n const set = new Set();\n for (const scope of scopes) {\n for (const key of Object.keys(scope).filter(k => !k.startsWith('_'))) {\n set.add(key);\n }\n }\n return Array.from(set);\n}\n\nexport function _parseObjectDataRadialScale(\n meta: ChartMeta<'line' | 'scatter'>,\n data: AnyObject[],\n start: number,\n count: number\n) {\n const {iScale} = meta;\n const {key = 'r'} = this._parsing;\n const parsed = new Array<{r: unknown}>(count);\n let i: number, ilen: number, index: number, item: AnyObject;\n\n for (i = 0, ilen = count; i < ilen; ++i) {\n index = i + start;\n item = data[index];\n parsed[i] = {\n r: iScale.parse(resolveObjectKey(item, key), index)\n };\n }\n return parsed;\n}\n","import {almostEquals, distanceBetweenPoints, sign} from './helpers.math.js';\nimport {_isPointInArea} from './helpers.canvas.js';\nimport type {ChartArea} from '../types/index.js';\nimport type {SplinePoint} from '../types/geometric.js';\n\nconst EPSILON = Number.EPSILON || 1e-14;\n\ntype OptionalSplinePoint = SplinePoint | false\nconst getPoint = (points: SplinePoint[], i: number): OptionalSplinePoint => i < points.length && !points[i].skip && points[i];\nconst getValueAxis = (indexAxis: 'x' | 'y') => indexAxis === 'x' ? 'y' : 'x';\n\nexport function splineCurve(\n firstPoint: SplinePoint,\n middlePoint: SplinePoint,\n afterPoint: SplinePoint,\n t: number\n): {\n previous: SplinePoint\n next: SplinePoint\n } {\n // Props to Rob Spencer at scaled innovation for his post on splining between points\n // http://scaledinnovation.com/analytics/splines/aboutSplines.html\n\n // This function must also respect \"skipped\" points\n\n const previous = firstPoint.skip ? middlePoint : firstPoint;\n const current = middlePoint;\n const next = afterPoint.skip ? middlePoint : afterPoint;\n const d01 = distanceBetweenPoints(current, previous);\n const d12 = distanceBetweenPoints(next, current);\n\n let s01 = d01 / (d01 + d12);\n let s12 = d12 / (d01 + d12);\n\n // If all points are the same, s01 & s02 will be inf\n s01 = isNaN(s01) ? 0 : s01;\n s12 = isNaN(s12) ? 0 : s12;\n\n const fa = t * s01; // scaling factor for triangle Ta\n const fb = t * s12;\n\n return {\n previous: {\n x: current.x - fa * (next.x - previous.x),\n y: current.y - fa * (next.y - previous.y)\n },\n next: {\n x: current.x + fb * (next.x - previous.x),\n y: current.y + fb * (next.y - previous.y)\n }\n };\n}\n\n/**\n * Adjust tangents to ensure monotonic properties\n */\nfunction monotoneAdjust(points: SplinePoint[], deltaK: number[], mK: number[]) {\n const pointsLen = points.length;\n\n let alphaK: number, betaK: number, tauK: number, squaredMagnitude: number, pointCurrent: OptionalSplinePoint;\n let pointAfter = getPoint(points, 0);\n for (let i = 0; i < pointsLen - 1; ++i) {\n pointCurrent = pointAfter;\n pointAfter = getPoint(points, i + 1);\n if (!pointCurrent || !pointAfter) {\n continue;\n }\n\n if (almostEquals(deltaK[i], 0, EPSILON)) {\n mK[i] = mK[i + 1] = 0;\n continue;\n }\n\n alphaK = mK[i] / deltaK[i];\n betaK = mK[i + 1] / deltaK[i];\n squaredMagnitude = Math.pow(alphaK, 2) + Math.pow(betaK, 2);\n if (squaredMagnitude <= 9) {\n continue;\n }\n\n tauK = 3 / Math.sqrt(squaredMagnitude);\n mK[i] = alphaK * tauK * deltaK[i];\n mK[i + 1] = betaK * tauK * deltaK[i];\n }\n}\n\nfunction monotoneCompute(points: SplinePoint[], mK: number[], indexAxis: 'x' | 'y' = 'x') {\n const valueAxis = getValueAxis(indexAxis);\n const pointsLen = points.length;\n let delta: number, pointBefore: OptionalSplinePoint, pointCurrent: OptionalSplinePoint;\n let pointAfter = getPoint(points, 0);\n\n for (let i = 0; i < pointsLen; ++i) {\n pointBefore = pointCurrent;\n pointCurrent = pointAfter;\n pointAfter = getPoint(points, i + 1);\n if (!pointCurrent) {\n continue;\n }\n\n const iPixel = pointCurrent[indexAxis];\n const vPixel = pointCurrent[valueAxis];\n if (pointBefore) {\n delta = (iPixel - pointBefore[indexAxis]) / 3;\n pointCurrent[`cp1${indexAxis}`] = iPixel - delta;\n pointCurrent[`cp1${valueAxis}`] = vPixel - delta * mK[i];\n }\n if (pointAfter) {\n delta = (pointAfter[indexAxis] - iPixel) / 3;\n pointCurrent[`cp2${indexAxis}`] = iPixel + delta;\n pointCurrent[`cp2${valueAxis}`] = vPixel + delta * mK[i];\n }\n }\n}\n\n/**\n * This function calculates Bézier control points in a similar way than |splineCurve|,\n * but preserves monotonicity of the provided data and ensures no local extremums are added\n * between the dataset discrete points due to the interpolation.\n * See : https://en.wikipedia.org/wiki/Monotone_cubic_interpolation\n */\nexport function splineCurveMonotone(points: SplinePoint[], indexAxis: 'x' | 'y' = 'x') {\n const valueAxis = getValueAxis(indexAxis);\n const pointsLen = points.length;\n const deltaK: number[] = Array(pointsLen).fill(0);\n const mK: number[] = Array(pointsLen);\n\n // Calculate slopes (deltaK) and initialize tangents (mK)\n let i, pointBefore: OptionalSplinePoint, pointCurrent: OptionalSplinePoint;\n let pointAfter = getPoint(points, 0);\n\n for (i = 0; i < pointsLen; ++i) {\n pointBefore = pointCurrent;\n pointCurrent = pointAfter;\n pointAfter = getPoint(points, i + 1);\n if (!pointCurrent) {\n continue;\n }\n\n if (pointAfter) {\n const slopeDelta = pointAfter[indexAxis] - pointCurrent[indexAxis];\n\n // In the case of two points that appear at the same x pixel, slopeDeltaX is 0\n deltaK[i] = slopeDelta !== 0 ? (pointAfter[valueAxis] - pointCurrent[valueAxis]) / slopeDelta : 0;\n }\n mK[i] = !pointBefore ? deltaK[i]\n : !pointAfter ? deltaK[i - 1]\n : (sign(deltaK[i - 1]) !== sign(deltaK[i])) ? 0\n : (deltaK[i - 1] + deltaK[i]) / 2;\n }\n\n monotoneAdjust(points, deltaK, mK);\n\n monotoneCompute(points, mK, indexAxis);\n}\n\nfunction capControlPoint(pt: number, min: number, max: number) {\n return Math.max(Math.min(pt, max), min);\n}\n\nfunction capBezierPoints(points: SplinePoint[], area: ChartArea) {\n let i, ilen, point, inArea, inAreaPrev;\n let inAreaNext = _isPointInArea(points[0], area);\n for (i = 0, ilen = points.length; i < ilen; ++i) {\n inAreaPrev = inArea;\n inArea = inAreaNext;\n inAreaNext = i < ilen - 1 && _isPointInArea(points[i + 1], area);\n if (!inArea) {\n continue;\n }\n point = points[i];\n if (inAreaPrev) {\n point.cp1x = capControlPoint(point.cp1x, area.left, area.right);\n point.cp1y = capControlPoint(point.cp1y, area.top, area.bottom);\n }\n if (inAreaNext) {\n point.cp2x = capControlPoint(point.cp2x, area.left, area.right);\n point.cp2y = capControlPoint(point.cp2y, area.top, area.bottom);\n }\n }\n}\n\n/**\n * @private\n */\nexport function _updateBezierControlPoints(\n points: SplinePoint[],\n options,\n area: ChartArea,\n loop: boolean,\n indexAxis: 'x' | 'y'\n) {\n let i: number, ilen: number, point: SplinePoint, controlPoints: ReturnType;\n\n // Only consider points that are drawn in case the spanGaps option is used\n if (options.spanGaps) {\n points = points.filter((pt) => !pt.skip);\n }\n\n if (options.cubicInterpolationMode === 'monotone') {\n splineCurveMonotone(points, indexAxis);\n } else {\n let prev = loop ? points[points.length - 1] : points[0];\n for (i = 0, ilen = points.length; i < ilen; ++i) {\n point = points[i];\n controlPoints = splineCurve(\n prev,\n point,\n points[Math.min(i + 1, ilen - (loop ? 0 : 1)) % ilen],\n options.tension\n );\n point.cp1x = controlPoints.previous.x;\n point.cp1y = controlPoints.previous.y;\n point.cp2x = controlPoints.next.x;\n point.cp2y = controlPoints.next.y;\n prev = point;\n }\n }\n\n if (options.capBezierPoints) {\n capBezierPoints(points, area);\n }\n}\n","import type {ChartArea, Scale} from '../types/index.js';\nimport type Chart from '../core/core.controller.js';\nimport type {ChartEvent} from '../types.js';\nimport {INFINITY} from './helpers.math.js';\n\n/**\n * Note: typedefs are auto-exported, so use a made-up `dom` namespace where\n * necessary to avoid duplicates with `export * from './helpers`; see\n * https://github.com/microsoft/TypeScript/issues/46011\n * @typedef { import('../core/core.controller.js').default } dom.Chart\n * @typedef { import('../../types').ChartEvent } ChartEvent\n */\n\n/**\n * @private\n */\nexport function _isDomSupported(): boolean {\n return typeof window !== 'undefined' && typeof document !== 'undefined';\n}\n\n/**\n * @private\n */\nexport function _getParentNode(domNode: HTMLCanvasElement): HTMLCanvasElement {\n let parent = domNode.parentNode;\n if (parent && parent.toString() === '[object ShadowRoot]') {\n parent = (parent as ShadowRoot).host;\n }\n return parent as HTMLCanvasElement;\n}\n\n/**\n * convert max-width/max-height values that may be percentages into a number\n * @private\n */\n\nfunction parseMaxStyle(styleValue: string | number, node: HTMLElement, parentProperty: string) {\n let valueInPixels: number;\n if (typeof styleValue === 'string') {\n valueInPixels = parseInt(styleValue, 10);\n\n if (styleValue.indexOf('%') !== -1) {\n // percentage * size in dimension\n valueInPixels = (valueInPixels / 100) * node.parentNode[parentProperty];\n }\n } else {\n valueInPixels = styleValue;\n }\n\n return valueInPixels;\n}\n\nconst getComputedStyle = (element: HTMLElement): CSSStyleDeclaration =>\n element.ownerDocument.defaultView.getComputedStyle(element, null);\n\nexport function getStyle(el: HTMLElement, property: string): string {\n return getComputedStyle(el).getPropertyValue(property);\n}\n\nconst positions = ['top', 'right', 'bottom', 'left'];\nfunction getPositionedStyle(styles: CSSStyleDeclaration, style: string, suffix?: string): ChartArea {\n const result = {} as ChartArea;\n suffix = suffix ? '-' + suffix : '';\n for (let i = 0; i < 4; i++) {\n const pos = positions[i];\n result[pos] = parseFloat(styles[style + '-' + pos + suffix]) || 0;\n }\n result.width = result.left + result.right;\n result.height = result.top + result.bottom;\n return result;\n}\n\nconst useOffsetPos = (x: number, y: number, target: HTMLElement | EventTarget) =>\n (x > 0 || y > 0) && (!target || !(target as HTMLElement).shadowRoot);\n\n/**\n * @param e\n * @param canvas\n * @returns Canvas position\n */\nfunction getCanvasPosition(\n e: Event | TouchEvent | MouseEvent,\n canvas: HTMLCanvasElement\n): {\n x: number;\n y: number;\n box: boolean;\n } {\n const touches = (e as TouchEvent).touches;\n const source = (touches && touches.length ? touches[0] : e) as MouseEvent;\n const {offsetX, offsetY} = source as MouseEvent;\n let box = false;\n let x, y;\n if (useOffsetPos(offsetX, offsetY, e.target)) {\n x = offsetX;\n y = offsetY;\n } else {\n const rect = canvas.getBoundingClientRect();\n x = source.clientX - rect.left;\n y = source.clientY - rect.top;\n box = true;\n }\n return {x, y, box};\n}\n\n/**\n * Gets an event's x, y coordinates, relative to the chart area\n * @param event\n * @param chart\n * @returns x and y coordinates of the event\n */\n\nexport function getRelativePosition(\n event: Event | ChartEvent | TouchEvent | MouseEvent,\n chart: Chart\n): { x: number; y: number } {\n if ('native' in event) {\n return event;\n }\n\n const {canvas, currentDevicePixelRatio} = chart;\n const style = getComputedStyle(canvas);\n const borderBox = style.boxSizing === 'border-box';\n const paddings = getPositionedStyle(style, 'padding');\n const borders = getPositionedStyle(style, 'border', 'width');\n const {x, y, box} = getCanvasPosition(event, canvas);\n const xOffset = paddings.left + (box && borders.left);\n const yOffset = paddings.top + (box && borders.top);\n\n let {width, height} = chart;\n if (borderBox) {\n width -= paddings.width + borders.width;\n height -= paddings.height + borders.height;\n }\n return {\n x: Math.round((x - xOffset) / width * canvas.width / currentDevicePixelRatio),\n y: Math.round((y - yOffset) / height * canvas.height / currentDevicePixelRatio)\n };\n}\n\nfunction getContainerSize(canvas: HTMLCanvasElement, width: number, height: number): Partial {\n let maxWidth: number, maxHeight: number;\n\n if (width === undefined || height === undefined) {\n const container = _getParentNode(canvas);\n if (!container) {\n width = canvas.clientWidth;\n height = canvas.clientHeight;\n } else {\n const rect = container.getBoundingClientRect(); // this is the border box of the container\n const containerStyle = getComputedStyle(container);\n const containerBorder = getPositionedStyle(containerStyle, 'border', 'width');\n const containerPadding = getPositionedStyle(containerStyle, 'padding');\n width = rect.width - containerPadding.width - containerBorder.width;\n height = rect.height - containerPadding.height - containerBorder.height;\n maxWidth = parseMaxStyle(containerStyle.maxWidth, container, 'clientWidth');\n maxHeight = parseMaxStyle(containerStyle.maxHeight, container, 'clientHeight');\n }\n }\n return {\n width,\n height,\n maxWidth: maxWidth || INFINITY,\n maxHeight: maxHeight || INFINITY\n };\n}\n\nconst round1 = (v: number) => Math.round(v * 10) / 10;\n\n// eslint-disable-next-line complexity\nexport function getMaximumSize(\n canvas: HTMLCanvasElement,\n bbWidth?: number,\n bbHeight?: number,\n aspectRatio?: number\n): { width: number; height: number } {\n const style = getComputedStyle(canvas);\n const margins = getPositionedStyle(style, 'margin');\n const maxWidth = parseMaxStyle(style.maxWidth, canvas, 'clientWidth') || INFINITY;\n const maxHeight = parseMaxStyle(style.maxHeight, canvas, 'clientHeight') || INFINITY;\n const containerSize = getContainerSize(canvas, bbWidth, bbHeight);\n let {width, height} = containerSize;\n\n if (style.boxSizing === 'content-box') {\n const borders = getPositionedStyle(style, 'border', 'width');\n const paddings = getPositionedStyle(style, 'padding');\n width -= paddings.width + borders.width;\n height -= paddings.height + borders.height;\n }\n width = Math.max(0, width - margins.width);\n height = Math.max(0, aspectRatio ? width / aspectRatio : height - margins.height);\n width = round1(Math.min(width, maxWidth, containerSize.maxWidth));\n height = round1(Math.min(height, maxHeight, containerSize.maxHeight));\n if (width && !height) {\n // https://github.com/chartjs/Chart.js/issues/4659\n // If the canvas has width, but no height, default to aspectRatio of 2 (canvas default)\n height = round1(width / 2);\n }\n\n const maintainHeight = bbWidth !== undefined || bbHeight !== undefined;\n\n if (maintainHeight && aspectRatio && containerSize.height && height > containerSize.height) {\n height = containerSize.height;\n width = round1(Math.floor(height * aspectRatio));\n }\n\n return {width, height};\n}\n\n/**\n * @param chart\n * @param forceRatio\n * @param forceStyle\n * @returns True if the canvas context size or transformation has changed.\n */\nexport function retinaScale(\n chart: Chart,\n forceRatio: number,\n forceStyle?: boolean\n): boolean | void {\n const pixelRatio = forceRatio || 1;\n const deviceHeight = Math.floor(chart.height * pixelRatio);\n const deviceWidth = Math.floor(chart.width * pixelRatio);\n\n chart.height = Math.floor(chart.height);\n chart.width = Math.floor(chart.width);\n\n const canvas = chart.canvas;\n\n // If no style has been set on the canvas, the render size is used as display size,\n // making the chart visually bigger, so let's enforce it to the \"correct\" values.\n // See https://github.com/chartjs/Chart.js/issues/3575\n if (canvas.style && (forceStyle || (!canvas.style.height && !canvas.style.width))) {\n canvas.style.height = `${chart.height}px`;\n canvas.style.width = `${chart.width}px`;\n }\n\n if (chart.currentDevicePixelRatio !== pixelRatio\n || canvas.height !== deviceHeight\n || canvas.width !== deviceWidth) {\n chart.currentDevicePixelRatio = pixelRatio;\n canvas.height = deviceHeight;\n canvas.width = deviceWidth;\n chart.ctx.setTransform(pixelRatio, 0, 0, pixelRatio, 0, 0);\n return true;\n }\n return false;\n}\n\n/**\n * Detects support for options object argument in addEventListener.\n * https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Safely_detecting_option_support\n * @private\n */\nexport const supportsEventListenerOptions = (function() {\n let passiveSupported = false;\n try {\n const options = {\n get passive() { // This function will be called when the browser attempts to access the passive property.\n passiveSupported = true;\n return false;\n }\n } as EventListenerOptions;\n\n if (_isDomSupported()) {\n window.addEventListener('test', null, options);\n window.removeEventListener('test', null, options);\n }\n } catch (e) {\n // continue regardless of error\n }\n return passiveSupported;\n}());\n\n/**\n * The \"used\" size is the final value of a dimension property after all calculations have\n * been performed. This method uses the computed style of `element` but returns undefined\n * if the computed style is not expressed in pixels. That can happen in some cases where\n * `element` has a size relative to its parent and this last one is not yet displayed,\n * for example because of `display: none` on a parent node.\n * @see https://developer.mozilla.org/en-US/docs/Web/CSS/used_value\n * @returns Size in pixels or undefined if unknown.\n */\n\nexport function readUsedSize(\n element: HTMLElement,\n property: 'width' | 'height'\n): number | undefined {\n const value = getStyle(element, property);\n const matches = value && value.match(/^(\\d+)(\\.\\d+)?px$/);\n return matches ? +matches[1] : undefined;\n}\n","import type {Point, SplinePoint} from '../types/geometric.js';\n\n/**\n * @private\n */\nexport function _pointInLine(p1: Point, p2: Point, t: number, mode?) { // eslint-disable-line @typescript-eslint/no-unused-vars\n return {\n x: p1.x + t * (p2.x - p1.x),\n y: p1.y + t * (p2.y - p1.y)\n };\n}\n\n/**\n * @private\n */\nexport function _steppedInterpolation(\n p1: Point,\n p2: Point,\n t: number, mode: 'middle' | 'after' | unknown\n) {\n return {\n x: p1.x + t * (p2.x - p1.x),\n y: mode === 'middle' ? t < 0.5 ? p1.y : p2.y\n : mode === 'after' ? t < 1 ? p1.y : p2.y\n : t > 0 ? p2.y : p1.y\n };\n}\n\n/**\n * @private\n */\nexport function _bezierInterpolation(p1: SplinePoint, p2: SplinePoint, t: number, mode?) { // eslint-disable-line @typescript-eslint/no-unused-vars\n const cp1 = {x: p1.cp2x, y: p1.cp2y};\n const cp2 = {x: p2.cp1x, y: p2.cp1y};\n const a = _pointInLine(p1, cp1, t);\n const b = _pointInLine(cp1, cp2, t);\n const c = _pointInLine(cp2, p2, t);\n const d = _pointInLine(a, b, t);\n const e = _pointInLine(b, c, t);\n return _pointInLine(d, e, t);\n}\n","export interface RTLAdapter {\n x(x: number): number;\n setWidth(w: number): void;\n textAlign(align: 'center' | 'left' | 'right'): 'center' | 'left' | 'right';\n xPlus(x: number, value: number): number;\n leftForLtr(x: number, itemWidth: number): number;\n}\n\nconst getRightToLeftAdapter = function(rectX: number, width: number): RTLAdapter {\n return {\n x(x) {\n return rectX + rectX + width - x;\n },\n setWidth(w) {\n width = w;\n },\n textAlign(align) {\n if (align === 'center') {\n return align;\n }\n return align === 'right' ? 'left' : 'right';\n },\n xPlus(x, value) {\n return x - value;\n },\n leftForLtr(x, itemWidth) {\n return x - itemWidth;\n },\n };\n};\n\nconst getLeftToRightAdapter = function(): RTLAdapter {\n return {\n x(x) {\n return x;\n },\n setWidth(w) { // eslint-disable-line no-unused-vars\n },\n textAlign(align) {\n return align;\n },\n xPlus(x, value) {\n return x + value;\n },\n leftForLtr(x, _itemWidth) { // eslint-disable-line @typescript-eslint/no-unused-vars\n return x;\n },\n };\n};\n\nexport function getRtlAdapter(rtl: boolean, rectX: number, width: number) {\n return rtl ? getRightToLeftAdapter(rectX, width) : getLeftToRightAdapter();\n}\n\nexport function overrideTextDirection(ctx: CanvasRenderingContext2D, direction: 'ltr' | 'rtl') {\n let style: CSSStyleDeclaration, original: [string, string];\n if (direction === 'ltr' || direction === 'rtl') {\n style = ctx.canvas.style;\n original = [\n style.getPropertyValue('direction'),\n style.getPropertyPriority('direction'),\n ];\n\n style.setProperty('direction', direction, 'important');\n (ctx as { prevTextDirection?: [string, string] }).prevTextDirection = original;\n }\n}\n\nexport function restoreTextDirection(ctx: CanvasRenderingContext2D, original?: [string, string]) {\n if (original !== undefined) {\n delete (ctx as { prevTextDirection?: [string, string] }).prevTextDirection;\n ctx.canvas.style.setProperty('direction', original[0], original[1]);\n }\n}\n","import {_angleBetween, _angleDiff, _isBetween, _normalizeAngle} from './helpers.math.js';\nimport {createContext} from './helpers.options.js';\nimport {isPatternOrGradient} from './helpers.color.js';\n\n/**\n * @typedef { import('../elements/element.line.js').default } LineElement\n * @typedef { import('../elements/element.point.js').default } PointElement\n * @typedef {{start: number, end: number, loop: boolean, style?: any}} Segment\n */\n\nfunction propertyFn(property) {\n if (property === 'angle') {\n return {\n between: _angleBetween,\n compare: _angleDiff,\n normalize: _normalizeAngle,\n };\n }\n return {\n between: _isBetween,\n compare: (a, b) => a - b,\n normalize: x => x\n };\n}\n\nfunction normalizeSegment({start, end, count, loop, style}) {\n return {\n start: start % count,\n end: end % count,\n loop: loop && (end - start + 1) % count === 0,\n style\n };\n}\n\nfunction getSegment(segment, points, bounds) {\n const {property, start: startBound, end: endBound} = bounds;\n const {between, normalize} = propertyFn(property);\n const count = points.length;\n // eslint-disable-next-line prefer-const\n let {start, end, loop} = segment;\n let i, ilen;\n\n if (loop) {\n start += count;\n end += count;\n for (i = 0, ilen = count; i < ilen; ++i) {\n if (!between(normalize(points[start % count][property]), startBound, endBound)) {\n break;\n }\n start--;\n end--;\n }\n start %= count;\n end %= count;\n }\n\n if (end < start) {\n end += count;\n }\n return {start, end, loop, style: segment.style};\n}\n\n/**\n * Returns the sub-segment(s) of a line segment that fall in the given bounds\n * @param {object} segment\n * @param {number} segment.start - start index of the segment, referring the points array\n * @param {number} segment.end - end index of the segment, referring the points array\n * @param {boolean} segment.loop - indicates that the segment is a loop\n * @param {object} [segment.style] - segment style\n * @param {PointElement[]} points - the points that this segment refers to\n * @param {object} [bounds]\n * @param {string} bounds.property - the property of a `PointElement` we are bounding. `x`, `y` or `angle`.\n * @param {number} bounds.start - start value of the property\n * @param {number} bounds.end - end value of the property\n * @private\n **/\nexport function _boundSegment(segment, points, bounds) {\n if (!bounds) {\n return [segment];\n }\n\n const {property, start: startBound, end: endBound} = bounds;\n const count = points.length;\n const {compare, between, normalize} = propertyFn(property);\n const {start, end, loop, style} = getSegment(segment, points, bounds);\n\n const result = [];\n let inside = false;\n let subStart = null;\n let value, point, prevValue;\n\n const startIsBefore = () => between(startBound, prevValue, value) && compare(startBound, prevValue) !== 0;\n const endIsBefore = () => compare(endBound, value) === 0 || between(endBound, prevValue, value);\n const shouldStart = () => inside || startIsBefore();\n const shouldStop = () => !inside || endIsBefore();\n\n for (let i = start, prev = start; i <= end; ++i) {\n point = points[i % count];\n\n if (point.skip) {\n continue;\n }\n\n value = normalize(point[property]);\n\n if (value === prevValue) {\n continue;\n }\n\n inside = between(value, startBound, endBound);\n\n if (subStart === null && shouldStart()) {\n subStart = compare(value, startBound) === 0 ? i : prev;\n }\n\n if (subStart !== null && shouldStop()) {\n result.push(normalizeSegment({start: subStart, end: i, loop, count, style}));\n subStart = null;\n }\n prev = i;\n prevValue = value;\n }\n\n if (subStart !== null) {\n result.push(normalizeSegment({start: subStart, end, loop, count, style}));\n }\n\n return result;\n}\n\n\n/**\n * Returns the segments of the line that are inside given bounds\n * @param {LineElement} line\n * @param {object} [bounds]\n * @param {string} bounds.property - the property we are bounding with. `x`, `y` or `angle`.\n * @param {number} bounds.start - start value of the `property`\n * @param {number} bounds.end - end value of the `property`\n * @private\n */\nexport function _boundSegments(line, bounds) {\n const result = [];\n const segments = line.segments;\n\n for (let i = 0; i < segments.length; i++) {\n const sub = _boundSegment(segments[i], line.points, bounds);\n if (sub.length) {\n result.push(...sub);\n }\n }\n return result;\n}\n\n/**\n * Find start and end index of a line.\n */\nfunction findStartAndEnd(points, count, loop, spanGaps) {\n let start = 0;\n let end = count - 1;\n\n if (loop && !spanGaps) {\n // loop and not spanning gaps, first find a gap to start from\n while (start < count && !points[start].skip) {\n start++;\n }\n }\n\n // find first non skipped point (after the first gap possibly)\n while (start < count && points[start].skip) {\n start++;\n }\n\n // if we looped to count, start needs to be 0\n start %= count;\n\n if (loop) {\n // loop will go past count, if start > 0\n end += start;\n }\n\n while (end > start && points[end % count].skip) {\n end--;\n }\n\n // end could be more than count, normalize\n end %= count;\n\n return {start, end};\n}\n\n/**\n * Compute solid segments from Points, when spanGaps === false\n * @param {PointElement[]} points - the points\n * @param {number} start - start index\n * @param {number} max - max index (can go past count on a loop)\n * @param {boolean} loop - boolean indicating that this would be a loop if no gaps are found\n */\nfunction solidSegments(points, start, max, loop) {\n const count = points.length;\n const result = [];\n let last = start;\n let prev = points[start];\n let end;\n\n for (end = start + 1; end <= max; ++end) {\n const cur = points[end % count];\n if (cur.skip || cur.stop) {\n if (!prev.skip) {\n loop = false;\n result.push({start: start % count, end: (end - 1) % count, loop});\n // @ts-ignore\n start = last = cur.stop ? end : null;\n }\n } else {\n last = end;\n if (prev.skip) {\n start = end;\n }\n }\n prev = cur;\n }\n\n if (last !== null) {\n result.push({start: start % count, end: last % count, loop});\n }\n\n return result;\n}\n\n/**\n * Compute the continuous segments that define the whole line\n * There can be skipped points within a segment, if spanGaps is true.\n * @param {LineElement} line\n * @param {object} [segmentOptions]\n * @return {Segment[]}\n * @private\n */\nexport function _computeSegments(line, segmentOptions) {\n const points = line.points;\n const spanGaps = line.options.spanGaps;\n const count = points.length;\n\n if (!count) {\n return [];\n }\n\n const loop = !!line._loop;\n const {start, end} = findStartAndEnd(points, count, loop, spanGaps);\n\n if (spanGaps === true) {\n return splitByStyles(line, [{start, end, loop}], points, segmentOptions);\n }\n\n const max = end < start ? end + count : end;\n const completeLoop = !!line._fullLoop && start === 0 && end === count - 1;\n return splitByStyles(line, solidSegments(points, start, max, completeLoop), points, segmentOptions);\n}\n\n/**\n * @param {Segment[]} segments\n * @param {PointElement[]} points\n * @param {object} [segmentOptions]\n * @return {Segment[]}\n */\nfunction splitByStyles(line, segments, points, segmentOptions) {\n if (!segmentOptions || !segmentOptions.setContext || !points) {\n return segments;\n }\n return doSplitByStyles(line, segments, points, segmentOptions);\n}\n\n/**\n * @param {LineElement} line\n * @param {Segment[]} segments\n * @param {PointElement[]} points\n * @param {object} [segmentOptions]\n * @return {Segment[]}\n */\nfunction doSplitByStyles(line, segments, points, segmentOptions) {\n const chartContext = line._chart.getContext();\n const baseStyle = readStyle(line.options);\n const {_datasetIndex: datasetIndex, options: {spanGaps}} = line;\n const count = points.length;\n const result = [];\n let prevStyle = baseStyle;\n let start = segments[0].start;\n let i = start;\n\n function addStyle(s, e, l, st) {\n const dir = spanGaps ? -1 : 1;\n if (s === e) {\n return;\n }\n // Style can not start/end on a skipped point, adjust indices accordingly\n s += count;\n while (points[s % count].skip) {\n s -= dir;\n }\n while (points[e % count].skip) {\n e += dir;\n }\n if (s % count !== e % count) {\n result.push({start: s % count, end: e % count, loop: l, style: st});\n prevStyle = st;\n start = e % count;\n }\n }\n\n for (const segment of segments) {\n start = spanGaps ? start : segment.start;\n let prev = points[start % count];\n let style;\n for (i = start + 1; i <= segment.end; i++) {\n const pt = points[i % count];\n style = readStyle(segmentOptions.setContext(createContext(chartContext, {\n type: 'segment',\n p0: prev,\n p1: pt,\n p0DataIndex: (i - 1) % count,\n p1DataIndex: i % count,\n datasetIndex\n })));\n if (styleChanged(style, prevStyle)) {\n addStyle(start, i - 1, segment.loop, prevStyle);\n }\n prev = pt;\n prevStyle = style;\n }\n if (start < i - 1) {\n addStyle(start, i - 1, segment.loop, prevStyle);\n }\n }\n\n return result;\n}\n\nfunction readStyle(options) {\n return {\n backgroundColor: options.backgroundColor,\n borderCapStyle: options.borderCapStyle,\n borderDash: options.borderDash,\n borderDashOffset: options.borderDashOffset,\n borderJoinStyle: options.borderJoinStyle,\n borderWidth: options.borderWidth,\n borderColor: options.borderColor\n };\n}\n\nfunction styleChanged(style, prevStyle) {\n if (!prevStyle) {\n return false;\n }\n const cache = [];\n const replacer = function(key, value) {\n if (!isPatternOrGradient(value)) {\n return value;\n }\n if (!cache.includes(value)) {\n cache.push(value);\n }\n return cache.indexOf(value);\n };\n return JSON.stringify(style, replacer) !== JSON.stringify(prevStyle, replacer);\n}\n","import {requestAnimFrame} from '../helpers/helpers.extras.js';\n\n/**\n * @typedef { import('./core.animation.js').default } Animation\n * @typedef { import('./core.controller.js').default } Chart\n */\n\n/**\n * Please use the module's default export which provides a singleton instance\n * Note: class is export for typedoc\n */\nexport class Animator {\n constructor() {\n this._request = null;\n this._charts = new Map();\n this._running = false;\n this._lastDate = undefined;\n }\n\n /**\n\t * @private\n\t */\n _notify(chart, anims, date, type) {\n const callbacks = anims.listeners[type];\n const numSteps = anims.duration;\n\n callbacks.forEach(fn => fn({\n chart,\n initial: anims.initial,\n numSteps,\n currentStep: Math.min(date - anims.start, numSteps)\n }));\n }\n\n /**\n\t * @private\n\t */\n _refresh() {\n if (this._request) {\n return;\n }\n this._running = true;\n\n this._request = requestAnimFrame.call(window, () => {\n this._update();\n this._request = null;\n\n if (this._running) {\n this._refresh();\n }\n });\n }\n\n /**\n\t * @private\n\t */\n _update(date = Date.now()) {\n let remaining = 0;\n\n this._charts.forEach((anims, chart) => {\n if (!anims.running || !anims.items.length) {\n return;\n }\n const items = anims.items;\n let i = items.length - 1;\n let draw = false;\n let item;\n\n for (; i >= 0; --i) {\n item = items[i];\n\n if (item._active) {\n if (item._total > anims.duration) {\n // if the animation has been updated and its duration prolonged,\n // update to total duration of current animations run (for progress event)\n anims.duration = item._total;\n }\n item.tick(date);\n draw = true;\n } else {\n // Remove the item by replacing it with last item and removing the last\n // A lot faster than splice.\n items[i] = items[items.length - 1];\n items.pop();\n }\n }\n\n if (draw) {\n chart.draw();\n this._notify(chart, anims, date, 'progress');\n }\n\n if (!items.length) {\n anims.running = false;\n this._notify(chart, anims, date, 'complete');\n anims.initial = false;\n }\n\n remaining += items.length;\n });\n\n this._lastDate = date;\n\n if (remaining === 0) {\n this._running = false;\n }\n }\n\n /**\n\t * @private\n\t */\n _getAnims(chart) {\n const charts = this._charts;\n let anims = charts.get(chart);\n if (!anims) {\n anims = {\n running: false,\n initial: true,\n items: [],\n listeners: {\n complete: [],\n progress: []\n }\n };\n charts.set(chart, anims);\n }\n return anims;\n }\n\n /**\n\t * @param {Chart} chart\n\t * @param {string} event - event name\n\t * @param {Function} cb - callback\n\t */\n listen(chart, event, cb) {\n this._getAnims(chart).listeners[event].push(cb);\n }\n\n /**\n\t * Add animations\n\t * @param {Chart} chart\n\t * @param {Animation[]} items - animations\n\t */\n add(chart, items) {\n if (!items || !items.length) {\n return;\n }\n this._getAnims(chart).items.push(...items);\n }\n\n /**\n\t * Counts number of active animations for the chart\n\t * @param {Chart} chart\n\t */\n has(chart) {\n return this._getAnims(chart).items.length > 0;\n }\n\n /**\n\t * Start animating (all charts)\n\t * @param {Chart} chart\n\t */\n start(chart) {\n const anims = this._charts.get(chart);\n if (!anims) {\n return;\n }\n anims.running = true;\n anims.start = Date.now();\n anims.duration = anims.items.reduce((acc, cur) => Math.max(acc, cur._duration), 0);\n this._refresh();\n }\n\n running(chart) {\n if (!this._running) {\n return false;\n }\n const anims = this._charts.get(chart);\n if (!anims || !anims.running || !anims.items.length) {\n return false;\n }\n return true;\n }\n\n /**\n\t * Stop all animations for the chart\n\t * @param {Chart} chart\n\t */\n stop(chart) {\n const anims = this._charts.get(chart);\n if (!anims || !anims.items.length) {\n return;\n }\n const items = anims.items;\n let i = items.length - 1;\n\n for (; i >= 0; --i) {\n items[i].cancel();\n }\n anims.items = [];\n this._notify(chart, anims, Date.now(), 'complete');\n }\n\n /**\n\t * Remove chart from Animator\n\t * @param {Chart} chart\n\t */\n remove(chart) {\n return this._charts.delete(chart);\n }\n}\n\n// singleton instance\nexport default /* #__PURE__ */ new Animator();\n","import effects from '../helpers/helpers.easing.js';\nimport {resolve} from '../helpers/helpers.options.js';\nimport {color as helpersColor} from '../helpers/helpers.color.js';\n\nconst transparent = 'transparent';\nconst interpolators = {\n boolean(from, to, factor) {\n return factor > 0.5 ? to : from;\n },\n /**\n * @param {string} from\n * @param {string} to\n * @param {number} factor\n */\n color(from, to, factor) {\n const c0 = helpersColor(from || transparent);\n const c1 = c0.valid && helpersColor(to || transparent);\n return c1 && c1.valid\n ? c1.mix(c0, factor).hexString()\n : to;\n },\n number(from, to, factor) {\n return from + (to - from) * factor;\n }\n};\n\nexport default class Animation {\n constructor(cfg, target, prop, to) {\n const currentValue = target[prop];\n\n to = resolve([cfg.to, to, currentValue, cfg.from]);\n const from = resolve([cfg.from, currentValue, to]);\n\n this._active = true;\n this._fn = cfg.fn || interpolators[cfg.type || typeof from];\n this._easing = effects[cfg.easing] || effects.linear;\n this._start = Math.floor(Date.now() + (cfg.delay || 0));\n this._duration = this._total = Math.floor(cfg.duration);\n this._loop = !!cfg.loop;\n this._target = target;\n this._prop = prop;\n this._from = from;\n this._to = to;\n this._promises = undefined;\n }\n\n active() {\n return this._active;\n }\n\n update(cfg, to, date) {\n if (this._active) {\n this._notify(false);\n\n const currentValue = this._target[this._prop];\n const elapsed = date - this._start;\n const remain = this._duration - elapsed;\n this._start = date;\n this._duration = Math.floor(Math.max(remain, cfg.duration));\n this._total += elapsed;\n this._loop = !!cfg.loop;\n this._to = resolve([cfg.to, to, currentValue, cfg.from]);\n this._from = resolve([cfg.from, currentValue, to]);\n }\n }\n\n cancel() {\n if (this._active) {\n // update current evaluated value, for smoother animations\n this.tick(Date.now());\n this._active = false;\n this._notify(false);\n }\n }\n\n tick(date) {\n const elapsed = date - this._start;\n const duration = this._duration;\n const prop = this._prop;\n const from = this._from;\n const loop = this._loop;\n const to = this._to;\n let factor;\n\n this._active = from !== to && (loop || (elapsed < duration));\n\n if (!this._active) {\n this._target[prop] = to;\n this._notify(true);\n return;\n }\n\n if (elapsed < 0) {\n this._target[prop] = from;\n return;\n }\n\n factor = (elapsed / duration) % 2;\n factor = loop && factor > 1 ? 2 - factor : factor;\n factor = this._easing(Math.min(1, Math.max(0, factor)));\n\n this._target[prop] = this._fn(from, to, factor);\n }\n\n wait() {\n const promises = this._promises || (this._promises = []);\n return new Promise((res, rej) => {\n promises.push({res, rej});\n });\n }\n\n _notify(resolved) {\n const method = resolved ? 'res' : 'rej';\n const promises = this._promises || [];\n for (let i = 0; i < promises.length; i++) {\n promises[i][method]();\n }\n }\n}\n","import animator from './core.animator.js';\nimport Animation from './core.animation.js';\nimport defaults from './core.defaults.js';\nimport {isArray, isObject} from '../helpers/helpers.core.js';\n\nexport default class Animations {\n constructor(chart, config) {\n this._chart = chart;\n this._properties = new Map();\n this.configure(config);\n }\n\n configure(config) {\n if (!isObject(config)) {\n return;\n }\n\n const animationOptions = Object.keys(defaults.animation);\n const animatedProps = this._properties;\n\n Object.getOwnPropertyNames(config).forEach(key => {\n const cfg = config[key];\n if (!isObject(cfg)) {\n return;\n }\n const resolved = {};\n for (const option of animationOptions) {\n resolved[option] = cfg[option];\n }\n\n (isArray(cfg.properties) && cfg.properties || [key]).forEach((prop) => {\n if (prop === key || !animatedProps.has(prop)) {\n animatedProps.set(prop, resolved);\n }\n });\n });\n }\n\n /**\n\t * Utility to handle animation of `options`.\n\t * @private\n\t */\n _animateOptions(target, values) {\n const newOptions = values.options;\n const options = resolveTargetOptions(target, newOptions);\n if (!options) {\n return [];\n }\n\n const animations = this._createAnimations(options, newOptions);\n if (newOptions.$shared) {\n // Going to shared options:\n // After all animations are done, assign the shared options object to the element\n // So any new updates to the shared options are observed\n awaitAll(target.options.$animations, newOptions).then(() => {\n target.options = newOptions;\n }, () => {\n // rejected, noop\n });\n }\n\n return animations;\n }\n\n /**\n\t * @private\n\t */\n _createAnimations(target, values) {\n const animatedProps = this._properties;\n const animations = [];\n const running = target.$animations || (target.$animations = {});\n const props = Object.keys(values);\n const date = Date.now();\n let i;\n\n for (i = props.length - 1; i >= 0; --i) {\n const prop = props[i];\n if (prop.charAt(0) === '$') {\n continue;\n }\n\n if (prop === 'options') {\n animations.push(...this._animateOptions(target, values));\n continue;\n }\n const value = values[prop];\n let animation = running[prop];\n const cfg = animatedProps.get(prop);\n\n if (animation) {\n if (cfg && animation.active()) {\n // There is an existing active animation, let's update that\n animation.update(cfg, value, date);\n continue;\n } else {\n animation.cancel();\n }\n }\n if (!cfg || !cfg.duration) {\n // not animated, set directly to new value\n target[prop] = value;\n continue;\n }\n\n running[prop] = animation = new Animation(cfg, target, prop, value);\n animations.push(animation);\n }\n return animations;\n }\n\n\n /**\n\t * Update `target` properties to new values, using configured animations\n\t * @param {object} target - object to update\n\t * @param {object} values - new target properties\n\t * @returns {boolean|undefined} - `true` if animations were started\n\t **/\n update(target, values) {\n if (this._properties.size === 0) {\n // Nothing is animated, just apply the new values.\n Object.assign(target, values);\n return;\n }\n\n const animations = this._createAnimations(target, values);\n\n if (animations.length) {\n animator.add(this._chart, animations);\n return true;\n }\n }\n}\n\nfunction awaitAll(animations, properties) {\n const running = [];\n const keys = Object.keys(properties);\n for (let i = 0; i < keys.length; i++) {\n const anim = animations[keys[i]];\n if (anim && anim.active()) {\n running.push(anim.wait());\n }\n }\n // @ts-ignore\n return Promise.all(running);\n}\n\nfunction resolveTargetOptions(target, newOptions) {\n if (!newOptions) {\n return;\n }\n let options = target.options;\n if (!options) {\n target.options = newOptions;\n return;\n }\n if (options.$shared) {\n // Going from shared options to distinct one:\n // Create new options object containing the old shared values and start updating that.\n target.options = options = Object.assign({}, options, {$shared: false, $animations: {}});\n }\n return options;\n}\n","import Animations from './core.animations.js';\nimport defaults from './core.defaults.js';\nimport {isArray, isFinite, isObject, valueOrDefault, resolveObjectKey, defined} from '../helpers/helpers.core.js';\nimport {listenArrayEvents, unlistenArrayEvents} from '../helpers/helpers.collection.js';\nimport {createContext, sign} from '../helpers/index.js';\n\n/**\n * @typedef { import('./core.controller.js').default } Chart\n * @typedef { import('./core.scale.js').default } Scale\n */\n\nfunction scaleClip(scale, allowedOverflow) {\n const opts = scale && scale.options || {};\n const reverse = opts.reverse;\n const min = opts.min === undefined ? allowedOverflow : 0;\n const max = opts.max === undefined ? allowedOverflow : 0;\n return {\n start: reverse ? max : min,\n end: reverse ? min : max\n };\n}\n\nfunction defaultClip(xScale, yScale, allowedOverflow) {\n if (allowedOverflow === false) {\n return false;\n }\n const x = scaleClip(xScale, allowedOverflow);\n const y = scaleClip(yScale, allowedOverflow);\n\n return {\n top: y.end,\n right: x.end,\n bottom: y.start,\n left: x.start\n };\n}\n\nfunction toClip(value) {\n let t, r, b, l;\n\n if (isObject(value)) {\n t = value.top;\n r = value.right;\n b = value.bottom;\n l = value.left;\n } else {\n t = r = b = l = value;\n }\n\n return {\n top: t,\n right: r,\n bottom: b,\n left: l,\n disabled: value === false\n };\n}\n\nfunction getSortedDatasetIndices(chart, filterVisible) {\n const keys = [];\n const metasets = chart._getSortedDatasetMetas(filterVisible);\n let i, ilen;\n\n for (i = 0, ilen = metasets.length; i < ilen; ++i) {\n keys.push(metasets[i].index);\n }\n return keys;\n}\n\nfunction applyStack(stack, value, dsIndex, options = {}) {\n const keys = stack.keys;\n const singleMode = options.mode === 'single';\n let i, ilen, datasetIndex, otherValue;\n\n if (value === null) {\n return;\n }\n\n for (i = 0, ilen = keys.length; i < ilen; ++i) {\n datasetIndex = +keys[i];\n if (datasetIndex === dsIndex) {\n if (options.all) {\n continue;\n }\n break;\n }\n otherValue = stack.values[datasetIndex];\n if (isFinite(otherValue) && (singleMode || (value === 0 || sign(value) === sign(otherValue)))) {\n value += otherValue;\n }\n }\n return value;\n}\n\nfunction convertObjectDataToArray(data) {\n const keys = Object.keys(data);\n const adata = new Array(keys.length);\n let i, ilen, key;\n for (i = 0, ilen = keys.length; i < ilen; ++i) {\n key = keys[i];\n adata[i] = {\n x: key,\n y: data[key]\n };\n }\n return adata;\n}\n\nfunction isStacked(scale, meta) {\n const stacked = scale && scale.options.stacked;\n return stacked || (stacked === undefined && meta.stack !== undefined);\n}\n\nfunction getStackKey(indexScale, valueScale, meta) {\n return `${indexScale.id}.${valueScale.id}.${meta.stack || meta.type}`;\n}\n\nfunction getUserBounds(scale) {\n const {min, max, minDefined, maxDefined} = scale.getUserBounds();\n return {\n min: minDefined ? min : Number.NEGATIVE_INFINITY,\n max: maxDefined ? max : Number.POSITIVE_INFINITY\n };\n}\n\nfunction getOrCreateStack(stacks, stackKey, indexValue) {\n const subStack = stacks[stackKey] || (stacks[stackKey] = {});\n return subStack[indexValue] || (subStack[indexValue] = {});\n}\n\nfunction getLastIndexInStack(stack, vScale, positive, type) {\n for (const meta of vScale.getMatchingVisibleMetas(type).reverse()) {\n const value = stack[meta.index];\n if ((positive && value > 0) || (!positive && value < 0)) {\n return meta.index;\n }\n }\n\n return null;\n}\n\nfunction updateStacks(controller, parsed) {\n const {chart, _cachedMeta: meta} = controller;\n const stacks = chart._stacks || (chart._stacks = {}); // map structure is {stackKey: {datasetIndex: value}}\n const {iScale, vScale, index: datasetIndex} = meta;\n const iAxis = iScale.axis;\n const vAxis = vScale.axis;\n const key = getStackKey(iScale, vScale, meta);\n const ilen = parsed.length;\n let stack;\n\n for (let i = 0; i < ilen; ++i) {\n const item = parsed[i];\n const {[iAxis]: index, [vAxis]: value} = item;\n const itemStacks = item._stacks || (item._stacks = {});\n stack = itemStacks[vAxis] = getOrCreateStack(stacks, key, index);\n stack[datasetIndex] = value;\n\n stack._top = getLastIndexInStack(stack, vScale, true, meta.type);\n stack._bottom = getLastIndexInStack(stack, vScale, false, meta.type);\n\n const visualValues = stack._visualValues || (stack._visualValues = {});\n visualValues[datasetIndex] = value;\n }\n}\n\nfunction getFirstScaleId(chart, axis) {\n const scales = chart.scales;\n return Object.keys(scales).filter(key => scales[key].axis === axis).shift();\n}\n\nfunction createDatasetContext(parent, index) {\n return createContext(parent,\n {\n active: false,\n dataset: undefined,\n datasetIndex: index,\n index,\n mode: 'default',\n type: 'dataset'\n }\n );\n}\n\nfunction createDataContext(parent, index, element) {\n return createContext(parent, {\n active: false,\n dataIndex: index,\n parsed: undefined,\n raw: undefined,\n element,\n index,\n mode: 'default',\n type: 'data'\n });\n}\n\nfunction clearStacks(meta, items) {\n // Not using meta.index here, because it might be already updated if the dataset changed location\n const datasetIndex = meta.controller.index;\n const axis = meta.vScale && meta.vScale.axis;\n if (!axis) {\n return;\n }\n\n items = items || meta._parsed;\n for (const parsed of items) {\n const stacks = parsed._stacks;\n if (!stacks || stacks[axis] === undefined || stacks[axis][datasetIndex] === undefined) {\n return;\n }\n delete stacks[axis][datasetIndex];\n if (stacks[axis]._visualValues !== undefined && stacks[axis]._visualValues[datasetIndex] !== undefined) {\n delete stacks[axis]._visualValues[datasetIndex];\n }\n }\n}\n\nconst isDirectUpdateMode = (mode) => mode === 'reset' || mode === 'none';\nconst cloneIfNotShared = (cached, shared) => shared ? cached : Object.assign({}, cached);\nconst createStack = (canStack, meta, chart) => canStack && !meta.hidden && meta._stacked\n && {keys: getSortedDatasetIndices(chart, true), values: null};\n\nexport default class DatasetController {\n\n /**\n * @type {any}\n */\n static defaults = {};\n\n /**\n * Element type used to generate a meta dataset (e.g. Chart.element.LineElement).\n */\n static datasetElementType = null;\n\n /**\n * Element type used to generate a meta data (e.g. Chart.element.PointElement).\n */\n static dataElementType = null;\n\n /**\n\t * @param {Chart} chart\n\t * @param {number} datasetIndex\n\t */\n constructor(chart, datasetIndex) {\n this.chart = chart;\n this._ctx = chart.ctx;\n this.index = datasetIndex;\n this._cachedDataOpts = {};\n this._cachedMeta = this.getMeta();\n this._type = this._cachedMeta.type;\n this.options = undefined;\n /** @type {boolean | object} */\n this._parsing = false;\n this._data = undefined;\n this._objectData = undefined;\n this._sharedOptions = undefined;\n this._drawStart = undefined;\n this._drawCount = undefined;\n this.enableOptionSharing = false;\n this.supportsDecimation = false;\n this.$context = undefined;\n this._syncList = [];\n this.datasetElementType = new.target.datasetElementType;\n this.dataElementType = new.target.dataElementType;\n\n this.initialize();\n }\n\n initialize() {\n const meta = this._cachedMeta;\n this.configure();\n this.linkScales();\n meta._stacked = isStacked(meta.vScale, meta);\n this.addElements();\n\n if (this.options.fill && !this.chart.isPluginEnabled('filler')) {\n console.warn(\"Tried to use the 'fill' option without the 'Filler' plugin enabled. Please import and register the 'Filler' plugin and make sure it is not disabled in the options\");\n }\n }\n\n updateIndex(datasetIndex) {\n if (this.index !== datasetIndex) {\n clearStacks(this._cachedMeta);\n }\n this.index = datasetIndex;\n }\n\n linkScales() {\n const chart = this.chart;\n const meta = this._cachedMeta;\n const dataset = this.getDataset();\n\n const chooseId = (axis, x, y, r) => axis === 'x' ? x : axis === 'r' ? r : y;\n\n const xid = meta.xAxisID = valueOrDefault(dataset.xAxisID, getFirstScaleId(chart, 'x'));\n const yid = meta.yAxisID = valueOrDefault(dataset.yAxisID, getFirstScaleId(chart, 'y'));\n const rid = meta.rAxisID = valueOrDefault(dataset.rAxisID, getFirstScaleId(chart, 'r'));\n const indexAxis = meta.indexAxis;\n const iid = meta.iAxisID = chooseId(indexAxis, xid, yid, rid);\n const vid = meta.vAxisID = chooseId(indexAxis, yid, xid, rid);\n meta.xScale = this.getScaleForId(xid);\n meta.yScale = this.getScaleForId(yid);\n meta.rScale = this.getScaleForId(rid);\n meta.iScale = this.getScaleForId(iid);\n meta.vScale = this.getScaleForId(vid);\n }\n\n getDataset() {\n return this.chart.data.datasets[this.index];\n }\n\n getMeta() {\n return this.chart.getDatasetMeta(this.index);\n }\n\n /**\n\t * @param {string} scaleID\n\t * @return {Scale}\n\t */\n getScaleForId(scaleID) {\n return this.chart.scales[scaleID];\n }\n\n /**\n\t * @private\n\t */\n _getOtherScale(scale) {\n const meta = this._cachedMeta;\n return scale === meta.iScale\n ? meta.vScale\n : meta.iScale;\n }\n\n reset() {\n this._update('reset');\n }\n\n /**\n\t * @private\n\t */\n _destroy() {\n const meta = this._cachedMeta;\n if (this._data) {\n unlistenArrayEvents(this._data, this);\n }\n if (meta._stacked) {\n clearStacks(meta);\n }\n }\n\n /**\n\t * @private\n\t */\n _dataCheck() {\n const dataset = this.getDataset();\n const data = dataset.data || (dataset.data = []);\n const _data = this._data;\n\n // In order to correctly handle data addition/deletion animation (and thus simulate\n // real-time charts), we need to monitor these data modifications and synchronize\n // the internal metadata accordingly.\n\n if (isObject(data)) {\n this._data = convertObjectDataToArray(data);\n } else if (_data !== data) {\n if (_data) {\n // This case happens when the user replaced the data array instance.\n unlistenArrayEvents(_data, this);\n // Discard old parsed data and stacks\n const meta = this._cachedMeta;\n clearStacks(meta);\n meta._parsed = [];\n }\n if (data && Object.isExtensible(data)) {\n listenArrayEvents(data, this);\n }\n this._syncList = [];\n this._data = data;\n }\n }\n\n addElements() {\n const meta = this._cachedMeta;\n\n this._dataCheck();\n\n if (this.datasetElementType) {\n meta.dataset = new this.datasetElementType();\n }\n }\n\n buildOrUpdateElements(resetNewElements) {\n const meta = this._cachedMeta;\n const dataset = this.getDataset();\n let stackChanged = false;\n\n this._dataCheck();\n\n // make sure cached _stacked status is current\n const oldStacked = meta._stacked;\n meta._stacked = isStacked(meta.vScale, meta);\n\n // detect change in stack option\n if (meta.stack !== dataset.stack) {\n stackChanged = true;\n // remove values from old stack\n clearStacks(meta);\n meta.stack = dataset.stack;\n }\n\n // Re-sync meta data in case the user replaced the data array or if we missed\n // any updates and so make sure that we handle number of datapoints changing.\n this._resyncElements(resetNewElements);\n\n // if stack changed, update stack values for the whole dataset\n if (stackChanged || oldStacked !== meta._stacked) {\n updateStacks(this, meta._parsed);\n }\n }\n\n /**\n\t * Merges user-supplied and default dataset-level options\n\t * @private\n\t */\n configure() {\n const config = this.chart.config;\n const scopeKeys = config.datasetScopeKeys(this._type);\n const scopes = config.getOptionScopes(this.getDataset(), scopeKeys, true);\n this.options = config.createResolver(scopes, this.getContext());\n this._parsing = this.options.parsing;\n this._cachedDataOpts = {};\n }\n\n /**\n\t * @param {number} start\n\t * @param {number} count\n\t */\n parse(start, count) {\n const {_cachedMeta: meta, _data: data} = this;\n const {iScale, _stacked} = meta;\n const iAxis = iScale.axis;\n\n let sorted = start === 0 && count === data.length ? true : meta._sorted;\n let prev = start > 0 && meta._parsed[start - 1];\n let i, cur, parsed;\n\n if (this._parsing === false) {\n meta._parsed = data;\n meta._sorted = true;\n parsed = data;\n } else {\n if (isArray(data[start])) {\n parsed = this.parseArrayData(meta, data, start, count);\n } else if (isObject(data[start])) {\n parsed = this.parseObjectData(meta, data, start, count);\n } else {\n parsed = this.parsePrimitiveData(meta, data, start, count);\n }\n\n const isNotInOrderComparedToPrev = () => cur[iAxis] === null || (prev && cur[iAxis] < prev[iAxis]);\n for (i = 0; i < count; ++i) {\n meta._parsed[i + start] = cur = parsed[i];\n if (sorted) {\n if (isNotInOrderComparedToPrev()) {\n sorted = false;\n }\n prev = cur;\n }\n }\n meta._sorted = sorted;\n }\n\n if (_stacked) {\n updateStacks(this, parsed);\n }\n }\n\n /**\n\t * Parse array of primitive values\n\t * @param {object} meta - dataset meta\n\t * @param {array} data - data array. Example [1,3,4]\n\t * @param {number} start - start index\n\t * @param {number} count - number of items to parse\n\t * @returns {object} parsed item - item containing index and a parsed value\n\t * for each scale id.\n\t * Example: {xScale0: 0, yScale0: 1}\n\t * @protected\n\t */\n parsePrimitiveData(meta, data, start, count) {\n const {iScale, vScale} = meta;\n const iAxis = iScale.axis;\n const vAxis = vScale.axis;\n const labels = iScale.getLabels();\n const singleScale = iScale === vScale;\n const parsed = new Array(count);\n let i, ilen, index;\n\n for (i = 0, ilen = count; i < ilen; ++i) {\n index = i + start;\n parsed[i] = {\n [iAxis]: singleScale || iScale.parse(labels[index], index),\n [vAxis]: vScale.parse(data[index], index)\n };\n }\n return parsed;\n }\n\n /**\n\t * Parse array of arrays\n\t * @param {object} meta - dataset meta\n\t * @param {array} data - data array. Example [[1,2],[3,4]]\n\t * @param {number} start - start index\n\t * @param {number} count - number of items to parse\n\t * @returns {object} parsed item - item containing index and a parsed value\n\t * for each scale id.\n\t * Example: {x: 0, y: 1}\n\t * @protected\n\t */\n parseArrayData(meta, data, start, count) {\n const {xScale, yScale} = meta;\n const parsed = new Array(count);\n let i, ilen, index, item;\n\n for (i = 0, ilen = count; i < ilen; ++i) {\n index = i + start;\n item = data[index];\n parsed[i] = {\n x: xScale.parse(item[0], index),\n y: yScale.parse(item[1], index)\n };\n }\n return parsed;\n }\n\n /**\n\t * Parse array of objects\n\t * @param {object} meta - dataset meta\n\t * @param {array} data - data array. Example [{x:1, y:5}, {x:2, y:10}]\n\t * @param {number} start - start index\n\t * @param {number} count - number of items to parse\n\t * @returns {object} parsed item - item containing index and a parsed value\n\t * for each scale id. _custom is optional\n\t * Example: {xScale0: 0, yScale0: 1, _custom: {r: 10, foo: 'bar'}}\n\t * @protected\n\t */\n parseObjectData(meta, data, start, count) {\n const {xScale, yScale} = meta;\n const {xAxisKey = 'x', yAxisKey = 'y'} = this._parsing;\n const parsed = new Array(count);\n let i, ilen, index, item;\n\n for (i = 0, ilen = count; i < ilen; ++i) {\n index = i + start;\n item = data[index];\n parsed[i] = {\n x: xScale.parse(resolveObjectKey(item, xAxisKey), index),\n y: yScale.parse(resolveObjectKey(item, yAxisKey), index)\n };\n }\n return parsed;\n }\n\n /**\n\t * @protected\n\t */\n getParsed(index) {\n return this._cachedMeta._parsed[index];\n }\n\n /**\n\t * @protected\n\t */\n getDataElement(index) {\n return this._cachedMeta.data[index];\n }\n\n /**\n\t * @protected\n\t */\n applyStack(scale, parsed, mode) {\n const chart = this.chart;\n const meta = this._cachedMeta;\n const value = parsed[scale.axis];\n const stack = {\n keys: getSortedDatasetIndices(chart, true),\n values: parsed._stacks[scale.axis]._visualValues\n };\n return applyStack(stack, value, meta.index, {mode});\n }\n\n /**\n\t * @protected\n\t */\n updateRangeFromParsed(range, scale, parsed, stack) {\n const parsedValue = parsed[scale.axis];\n let value = parsedValue === null ? NaN : parsedValue;\n const values = stack && parsed._stacks[scale.axis];\n if (stack && values) {\n stack.values = values;\n value = applyStack(stack, parsedValue, this._cachedMeta.index);\n }\n range.min = Math.min(range.min, value);\n range.max = Math.max(range.max, value);\n }\n\n /**\n\t * @protected\n\t */\n getMinMax(scale, canStack) {\n const meta = this._cachedMeta;\n const _parsed = meta._parsed;\n const sorted = meta._sorted && scale === meta.iScale;\n const ilen = _parsed.length;\n const otherScale = this._getOtherScale(scale);\n const stack = createStack(canStack, meta, this.chart);\n const range = {min: Number.POSITIVE_INFINITY, max: Number.NEGATIVE_INFINITY};\n const {min: otherMin, max: otherMax} = getUserBounds(otherScale);\n let i, parsed;\n\n function _skip() {\n parsed = _parsed[i];\n const otherValue = parsed[otherScale.axis];\n return !isFinite(parsed[scale.axis]) || otherMin > otherValue || otherMax < otherValue;\n }\n\n for (i = 0; i < ilen; ++i) {\n if (_skip()) {\n continue;\n }\n this.updateRangeFromParsed(range, scale, parsed, stack);\n if (sorted) {\n // if the data is sorted, we don't need to check further from this end of array\n break;\n }\n }\n if (sorted) {\n // in the sorted case, find first non-skipped value from other end of array\n for (i = ilen - 1; i >= 0; --i) {\n if (_skip()) {\n continue;\n }\n this.updateRangeFromParsed(range, scale, parsed, stack);\n break;\n }\n }\n return range;\n }\n\n getAllParsedValues(scale) {\n const parsed = this._cachedMeta._parsed;\n const values = [];\n let i, ilen, value;\n\n for (i = 0, ilen = parsed.length; i < ilen; ++i) {\n value = parsed[i][scale.axis];\n if (isFinite(value)) {\n values.push(value);\n }\n }\n return values;\n }\n\n /**\n\t * @return {number|boolean}\n\t * @protected\n\t */\n getMaxOverflow() {\n return false;\n }\n\n /**\n\t * @protected\n\t */\n getLabelAndValue(index) {\n const meta = this._cachedMeta;\n const iScale = meta.iScale;\n const vScale = meta.vScale;\n const parsed = this.getParsed(index);\n return {\n label: iScale ? '' + iScale.getLabelForValue(parsed[iScale.axis]) : '',\n value: vScale ? '' + vScale.getLabelForValue(parsed[vScale.axis]) : ''\n };\n }\n\n /**\n\t * @private\n\t */\n _update(mode) {\n const meta = this._cachedMeta;\n this.update(mode || 'default');\n meta._clip = toClip(valueOrDefault(this.options.clip, defaultClip(meta.xScale, meta.yScale, this.getMaxOverflow())));\n }\n\n /**\n\t * @param {string} mode\n\t */\n update(mode) {} // eslint-disable-line no-unused-vars\n\n draw() {\n const ctx = this._ctx;\n const chart = this.chart;\n const meta = this._cachedMeta;\n const elements = meta.data || [];\n const area = chart.chartArea;\n const active = [];\n const start = this._drawStart || 0;\n const count = this._drawCount || (elements.length - start);\n const drawActiveElementsOnTop = this.options.drawActiveElementsOnTop;\n let i;\n\n if (meta.dataset) {\n meta.dataset.draw(ctx, area, start, count);\n }\n\n for (i = start; i < start + count; ++i) {\n const element = elements[i];\n if (element.hidden) {\n continue;\n }\n if (element.active && drawActiveElementsOnTop) {\n active.push(element);\n } else {\n element.draw(ctx, area);\n }\n }\n\n for (i = 0; i < active.length; ++i) {\n active[i].draw(ctx, area);\n }\n }\n\n /**\n\t * Returns a set of predefined style properties that should be used to represent the dataset\n\t * or the data if the index is specified\n\t * @param {number} index - data index\n\t * @param {boolean} [active] - true if hover\n\t * @return {object} style object\n\t */\n getStyle(index, active) {\n const mode = active ? 'active' : 'default';\n return index === undefined && this._cachedMeta.dataset\n ? this.resolveDatasetElementOptions(mode)\n : this.resolveDataElementOptions(index || 0, mode);\n }\n\n /**\n\t * @protected\n\t */\n getContext(index, active, mode) {\n const dataset = this.getDataset();\n let context;\n if (index >= 0 && index < this._cachedMeta.data.length) {\n const element = this._cachedMeta.data[index];\n context = element.$context ||\n (element.$context = createDataContext(this.getContext(), index, element));\n context.parsed = this.getParsed(index);\n context.raw = dataset.data[index];\n context.index = context.dataIndex = index;\n } else {\n context = this.$context ||\n (this.$context = createDatasetContext(this.chart.getContext(), this.index));\n context.dataset = dataset;\n context.index = context.datasetIndex = this.index;\n }\n\n context.active = !!active;\n context.mode = mode;\n return context;\n }\n\n /**\n\t * @param {string} [mode]\n\t * @protected\n\t */\n resolveDatasetElementOptions(mode) {\n return this._resolveElementOptions(this.datasetElementType.id, mode);\n }\n\n /**\n\t * @param {number} index\n\t * @param {string} [mode]\n\t * @protected\n\t */\n resolveDataElementOptions(index, mode) {\n return this._resolveElementOptions(this.dataElementType.id, mode, index);\n }\n\n /**\n\t * @private\n\t */\n _resolveElementOptions(elementType, mode = 'default', index) {\n const active = mode === 'active';\n const cache = this._cachedDataOpts;\n const cacheKey = elementType + '-' + mode;\n const cached = cache[cacheKey];\n const sharing = this.enableOptionSharing && defined(index);\n if (cached) {\n return cloneIfNotShared(cached, sharing);\n }\n const config = this.chart.config;\n const scopeKeys = config.datasetElementScopeKeys(this._type, elementType);\n const prefixes = active ? [`${elementType}Hover`, 'hover', elementType, ''] : [elementType, ''];\n const scopes = config.getOptionScopes(this.getDataset(), scopeKeys);\n const names = Object.keys(defaults.elements[elementType]);\n // context is provided as a function, and is called only if needed,\n // so we don't create a context for each element if not needed.\n const context = () => this.getContext(index, active, mode);\n const values = config.resolveNamedOptions(scopes, names, context, prefixes);\n\n if (values.$shared) {\n // `$shared` indicates this set of options can be shared between multiple elements.\n // Sharing is used to reduce number of properties to change during animation.\n values.$shared = sharing;\n\n // We cache options by `mode`, which can be 'active' for example. This enables us\n // to have the 'active' element options and 'default' options to switch between\n // when interacting.\n cache[cacheKey] = Object.freeze(cloneIfNotShared(values, sharing));\n }\n\n return values;\n }\n\n\n /**\n\t * @private\n\t */\n _resolveAnimations(index, transition, active) {\n const chart = this.chart;\n const cache = this._cachedDataOpts;\n const cacheKey = `animation-${transition}`;\n const cached = cache[cacheKey];\n if (cached) {\n return cached;\n }\n let options;\n if (chart.options.animation !== false) {\n const config = this.chart.config;\n const scopeKeys = config.datasetAnimationScopeKeys(this._type, transition);\n const scopes = config.getOptionScopes(this.getDataset(), scopeKeys);\n options = config.createResolver(scopes, this.getContext(index, active, transition));\n }\n const animations = new Animations(chart, options && options.animations);\n if (options && options._cacheable) {\n cache[cacheKey] = Object.freeze(animations);\n }\n return animations;\n }\n\n /**\n\t * Utility for getting the options object shared between elements\n\t * @protected\n\t */\n getSharedOptions(options) {\n if (!options.$shared) {\n return;\n }\n return this._sharedOptions || (this._sharedOptions = Object.assign({}, options));\n }\n\n /**\n\t * Utility for determining if `options` should be included in the updated properties\n\t * @protected\n\t */\n includeOptions(mode, sharedOptions) {\n return !sharedOptions || isDirectUpdateMode(mode) || this.chart._animationsDisabled;\n }\n\n /**\n * @todo v4, rename to getSharedOptions and remove excess functions\n */\n _getSharedOptions(start, mode) {\n const firstOpts = this.resolveDataElementOptions(start, mode);\n const previouslySharedOptions = this._sharedOptions;\n const sharedOptions = this.getSharedOptions(firstOpts);\n const includeOptions = this.includeOptions(mode, sharedOptions) || (sharedOptions !== previouslySharedOptions);\n this.updateSharedOptions(sharedOptions, mode, firstOpts);\n return {sharedOptions, includeOptions};\n }\n\n /**\n\t * Utility for updating an element with new properties, using animations when appropriate.\n\t * @protected\n\t */\n updateElement(element, index, properties, mode) {\n if (isDirectUpdateMode(mode)) {\n Object.assign(element, properties);\n } else {\n this._resolveAnimations(index, mode).update(element, properties);\n }\n }\n\n /**\n\t * Utility to animate the shared options, that are potentially affecting multiple elements.\n\t * @protected\n\t */\n updateSharedOptions(sharedOptions, mode, newOptions) {\n if (sharedOptions && !isDirectUpdateMode(mode)) {\n this._resolveAnimations(undefined, mode).update(sharedOptions, newOptions);\n }\n }\n\n /**\n\t * @private\n\t */\n _setStyle(element, index, mode, active) {\n element.active = active;\n const options = this.getStyle(index, active);\n this._resolveAnimations(index, mode, active).update(element, {\n // When going from active to inactive, we need to update to the shared options.\n // This way the once hovered element will end up with the same original shared options instance, after animation.\n options: (!active && this.getSharedOptions(options)) || options\n });\n }\n\n removeHoverStyle(element, datasetIndex, index) {\n this._setStyle(element, index, 'active', false);\n }\n\n setHoverStyle(element, datasetIndex, index) {\n this._setStyle(element, index, 'active', true);\n }\n\n /**\n\t * @private\n\t */\n _removeDatasetHoverStyle() {\n const element = this._cachedMeta.dataset;\n\n if (element) {\n this._setStyle(element, undefined, 'active', false);\n }\n }\n\n /**\n\t * @private\n\t */\n _setDatasetHoverStyle() {\n const element = this._cachedMeta.dataset;\n\n if (element) {\n this._setStyle(element, undefined, 'active', true);\n }\n }\n\n /**\n\t * @private\n\t */\n _resyncElements(resetNewElements) {\n const data = this._data;\n const elements = this._cachedMeta.data;\n\n // Apply changes detected through array listeners\n for (const [method, arg1, arg2] of this._syncList) {\n this[method](arg1, arg2);\n }\n this._syncList = [];\n\n const numMeta = elements.length;\n const numData = data.length;\n const count = Math.min(numData, numMeta);\n\n if (count) {\n // TODO: It is not optimal to always parse the old data\n // This is done because we are not detecting direct assignments:\n // chart.data.datasets[0].data[5] = 10;\n // chart.data.datasets[0].data[5].y = 10;\n this.parse(0, count);\n }\n\n if (numData > numMeta) {\n this._insertElements(numMeta, numData - numMeta, resetNewElements);\n } else if (numData < numMeta) {\n this._removeElements(numData, numMeta - numData);\n }\n }\n\n /**\n\t * @private\n\t */\n _insertElements(start, count, resetNewElements = true) {\n const meta = this._cachedMeta;\n const data = meta.data;\n const end = start + count;\n let i;\n\n const move = (arr) => {\n arr.length += count;\n for (i = arr.length - 1; i >= end; i--) {\n arr[i] = arr[i - count];\n }\n };\n move(data);\n\n for (i = start; i < end; ++i) {\n data[i] = new this.dataElementType();\n }\n\n if (this._parsing) {\n move(meta._parsed);\n }\n this.parse(start, count);\n\n if (resetNewElements) {\n this.updateElements(data, start, count, 'reset');\n }\n }\n\n updateElements(element, start, count, mode) {} // eslint-disable-line no-unused-vars\n\n /**\n\t * @private\n\t */\n _removeElements(start, count) {\n const meta = this._cachedMeta;\n if (this._parsing) {\n const removed = meta._parsed.splice(start, count);\n if (meta._stacked) {\n clearStacks(meta, removed);\n }\n }\n meta.data.splice(start, count);\n }\n\n /**\n\t * @private\n */\n _sync(args) {\n if (this._parsing) {\n this._syncList.push(args);\n } else {\n const [method, arg1, arg2] = args;\n this[method](arg1, arg2);\n }\n this.chart._dataChanges.push([this.index, ...args]);\n }\n\n _onDataPush() {\n const count = arguments.length;\n this._sync(['_insertElements', this.getDataset().data.length - count, count]);\n }\n\n _onDataPop() {\n this._sync(['_removeElements', this._cachedMeta.data.length - 1, 1]);\n }\n\n _onDataShift() {\n this._sync(['_removeElements', 0, 1]);\n }\n\n _onDataSplice(start, count) {\n if (count) {\n this._sync(['_removeElements', start, count]);\n }\n const newCount = arguments.length - 2;\n if (newCount) {\n this._sync(['_insertElements', start, newCount]);\n }\n }\n\n _onDataUnshift() {\n this._sync(['_insertElements', 0, arguments.length]);\n }\n}\n","import DatasetController from '../core/core.datasetController.js';\nimport {\n _arrayUnique, isArray, isNullOrUndef,\n valueOrDefault, resolveObjectKey, sign, defined\n} from '../helpers/index.js';\n\nfunction getAllScaleValues(scale, type) {\n if (!scale._cache.$bar) {\n const visibleMetas = scale.getMatchingVisibleMetas(type);\n let values = [];\n\n for (let i = 0, ilen = visibleMetas.length; i < ilen; i++) {\n values = values.concat(visibleMetas[i].controller.getAllParsedValues(scale));\n }\n scale._cache.$bar = _arrayUnique(values.sort((a, b) => a - b));\n }\n return scale._cache.$bar;\n}\n\n/**\n * Computes the \"optimal\" sample size to maintain bars equally sized while preventing overlap.\n * @private\n */\nfunction computeMinSampleSize(meta) {\n const scale = meta.iScale;\n const values = getAllScaleValues(scale, meta.type);\n let min = scale._length;\n let i, ilen, curr, prev;\n const updateMinAndPrev = () => {\n if (curr === 32767 || curr === -32768) {\n // Ignore truncated pixels\n return;\n }\n if (defined(prev)) {\n // curr - prev === 0 is ignored\n min = Math.min(min, Math.abs(curr - prev) || min);\n }\n prev = curr;\n };\n\n for (i = 0, ilen = values.length; i < ilen; ++i) {\n curr = scale.getPixelForValue(values[i]);\n updateMinAndPrev();\n }\n\n prev = undefined;\n for (i = 0, ilen = scale.ticks.length; i < ilen; ++i) {\n curr = scale.getPixelForTick(i);\n updateMinAndPrev();\n }\n\n return min;\n}\n\n/**\n * Computes an \"ideal\" category based on the absolute bar thickness or, if undefined or null,\n * uses the smallest interval (see computeMinSampleSize) that prevents bar overlapping. This\n * mode currently always generates bars equally sized (until we introduce scriptable options?).\n * @private\n */\nfunction computeFitCategoryTraits(index, ruler, options, stackCount) {\n const thickness = options.barThickness;\n let size, ratio;\n\n if (isNullOrUndef(thickness)) {\n size = ruler.min * options.categoryPercentage;\n ratio = options.barPercentage;\n } else {\n // When bar thickness is enforced, category and bar percentages are ignored.\n // Note(SB): we could add support for relative bar thickness (e.g. barThickness: '50%')\n // and deprecate barPercentage since this value is ignored when thickness is absolute.\n size = thickness * stackCount;\n ratio = 1;\n }\n\n return {\n chunk: size / stackCount,\n ratio,\n start: ruler.pixels[index] - (size / 2)\n };\n}\n\n/**\n * Computes an \"optimal\" category that globally arranges bars side by side (no gap when\n * percentage options are 1), based on the previous and following categories. This mode\n * generates bars with different widths when data are not evenly spaced.\n * @private\n */\nfunction computeFlexCategoryTraits(index, ruler, options, stackCount) {\n const pixels = ruler.pixels;\n const curr = pixels[index];\n let prev = index > 0 ? pixels[index - 1] : null;\n let next = index < pixels.length - 1 ? pixels[index + 1] : null;\n const percent = options.categoryPercentage;\n\n if (prev === null) {\n // first data: its size is double based on the next point or,\n // if it's also the last data, we use the scale size.\n prev = curr - (next === null ? ruler.end - ruler.start : next - curr);\n }\n\n if (next === null) {\n // last data: its size is also double based on the previous point.\n next = curr + curr - prev;\n }\n\n const start = curr - (curr - Math.min(prev, next)) / 2 * percent;\n const size = Math.abs(next - prev) / 2 * percent;\n\n return {\n chunk: size / stackCount,\n ratio: options.barPercentage,\n start\n };\n}\n\nfunction parseFloatBar(entry, item, vScale, i) {\n const startValue = vScale.parse(entry[0], i);\n const endValue = vScale.parse(entry[1], i);\n const min = Math.min(startValue, endValue);\n const max = Math.max(startValue, endValue);\n let barStart = min;\n let barEnd = max;\n\n if (Math.abs(min) > Math.abs(max)) {\n barStart = max;\n barEnd = min;\n }\n\n // Store `barEnd` (furthest away from origin) as parsed value,\n // to make stacking straight forward\n item[vScale.axis] = barEnd;\n\n item._custom = {\n barStart,\n barEnd,\n start: startValue,\n end: endValue,\n min,\n max\n };\n}\n\nfunction parseValue(entry, item, vScale, i) {\n if (isArray(entry)) {\n parseFloatBar(entry, item, vScale, i);\n } else {\n item[vScale.axis] = vScale.parse(entry, i);\n }\n return item;\n}\n\nfunction parseArrayOrPrimitive(meta, data, start, count) {\n const iScale = meta.iScale;\n const vScale = meta.vScale;\n const labels = iScale.getLabels();\n const singleScale = iScale === vScale;\n const parsed = [];\n let i, ilen, item, entry;\n\n for (i = start, ilen = start + count; i < ilen; ++i) {\n entry = data[i];\n item = {};\n item[iScale.axis] = singleScale || iScale.parse(labels[i], i);\n parsed.push(parseValue(entry, item, vScale, i));\n }\n return parsed;\n}\n\nfunction isFloatBar(custom) {\n return custom && custom.barStart !== undefined && custom.barEnd !== undefined;\n}\n\nfunction barSign(size, vScale, actualBase) {\n if (size !== 0) {\n return sign(size);\n }\n return (vScale.isHorizontal() ? 1 : -1) * (vScale.min >= actualBase ? 1 : -1);\n}\n\nfunction borderProps(properties) {\n let reverse, start, end, top, bottom;\n if (properties.horizontal) {\n reverse = properties.base > properties.x;\n start = 'left';\n end = 'right';\n } else {\n reverse = properties.base < properties.y;\n start = 'bottom';\n end = 'top';\n }\n if (reverse) {\n top = 'end';\n bottom = 'start';\n } else {\n top = 'start';\n bottom = 'end';\n }\n return {start, end, reverse, top, bottom};\n}\n\nfunction setBorderSkipped(properties, options, stack, index) {\n let edge = options.borderSkipped;\n const res = {};\n\n if (!edge) {\n properties.borderSkipped = res;\n return;\n }\n\n if (edge === true) {\n properties.borderSkipped = {top: true, right: true, bottom: true, left: true};\n return;\n }\n\n const {start, end, reverse, top, bottom} = borderProps(properties);\n\n if (edge === 'middle' && stack) {\n properties.enableBorderRadius = true;\n if ((stack._top || 0) === index) {\n edge = top;\n } else if ((stack._bottom || 0) === index) {\n edge = bottom;\n } else {\n res[parseEdge(bottom, start, end, reverse)] = true;\n edge = top;\n }\n }\n\n res[parseEdge(edge, start, end, reverse)] = true;\n properties.borderSkipped = res;\n}\n\nfunction parseEdge(edge, a, b, reverse) {\n if (reverse) {\n edge = swap(edge, a, b);\n edge = startEnd(edge, b, a);\n } else {\n edge = startEnd(edge, a, b);\n }\n return edge;\n}\n\nfunction swap(orig, v1, v2) {\n return orig === v1 ? v2 : orig === v2 ? v1 : orig;\n}\n\nfunction startEnd(v, start, end) {\n return v === 'start' ? start : v === 'end' ? end : v;\n}\n\nfunction setInflateAmount(properties, {inflateAmount}, ratio) {\n properties.inflateAmount = inflateAmount === 'auto'\n ? ratio === 1 ? 0.33 : 0\n : inflateAmount;\n}\n\nexport default class BarController extends DatasetController {\n\n static id = 'bar';\n\n /**\n * @type {any}\n */\n static defaults = {\n datasetElementType: false,\n dataElementType: 'bar',\n\n categoryPercentage: 0.8,\n barPercentage: 0.9,\n grouped: true,\n\n animations: {\n numbers: {\n type: 'number',\n properties: ['x', 'y', 'base', 'width', 'height']\n }\n }\n };\n\n /**\n * @type {any}\n */\n static overrides = {\n scales: {\n _index_: {\n type: 'category',\n offset: true,\n grid: {\n offset: true\n }\n },\n _value_: {\n type: 'linear',\n beginAtZero: true,\n }\n }\n };\n\n\n /**\n\t * Overriding primitive data parsing since we support mixed primitive/array\n\t * data for float bars\n\t * @protected\n\t */\n parsePrimitiveData(meta, data, start, count) {\n return parseArrayOrPrimitive(meta, data, start, count);\n }\n\n /**\n\t * Overriding array data parsing since we support mixed primitive/array\n\t * data for float bars\n\t * @protected\n\t */\n parseArrayData(meta, data, start, count) {\n return parseArrayOrPrimitive(meta, data, start, count);\n }\n\n /**\n\t * Overriding object data parsing since we support mixed primitive/array\n\t * value-scale data for float bars\n\t * @protected\n\t */\n parseObjectData(meta, data, start, count) {\n const {iScale, vScale} = meta;\n const {xAxisKey = 'x', yAxisKey = 'y'} = this._parsing;\n const iAxisKey = iScale.axis === 'x' ? xAxisKey : yAxisKey;\n const vAxisKey = vScale.axis === 'x' ? xAxisKey : yAxisKey;\n const parsed = [];\n let i, ilen, item, obj;\n for (i = start, ilen = start + count; i < ilen; ++i) {\n obj = data[i];\n item = {};\n item[iScale.axis] = iScale.parse(resolveObjectKey(obj, iAxisKey), i);\n parsed.push(parseValue(resolveObjectKey(obj, vAxisKey), item, vScale, i));\n }\n return parsed;\n }\n\n /**\n\t * @protected\n\t */\n updateRangeFromParsed(range, scale, parsed, stack) {\n super.updateRangeFromParsed(range, scale, parsed, stack);\n const custom = parsed._custom;\n if (custom && scale === this._cachedMeta.vScale) {\n // float bar: only one end of the bar is considered by `super`\n range.min = Math.min(range.min, custom.min);\n range.max = Math.max(range.max, custom.max);\n }\n }\n\n /**\n\t * @return {number|boolean}\n\t * @protected\n\t */\n getMaxOverflow() {\n return 0;\n }\n\n /**\n\t * @protected\n\t */\n getLabelAndValue(index) {\n const meta = this._cachedMeta;\n const {iScale, vScale} = meta;\n const parsed = this.getParsed(index);\n const custom = parsed._custom;\n const value = isFloatBar(custom)\n ? '[' + custom.start + ', ' + custom.end + ']'\n : '' + vScale.getLabelForValue(parsed[vScale.axis]);\n\n return {\n label: '' + iScale.getLabelForValue(parsed[iScale.axis]),\n value\n };\n }\n\n initialize() {\n this.enableOptionSharing = true;\n\n super.initialize();\n\n const meta = this._cachedMeta;\n meta.stack = this.getDataset().stack;\n }\n\n update(mode) {\n const meta = this._cachedMeta;\n this.updateElements(meta.data, 0, meta.data.length, mode);\n }\n\n updateElements(bars, start, count, mode) {\n const reset = mode === 'reset';\n const {index, _cachedMeta: {vScale}} = this;\n const base = vScale.getBasePixel();\n const horizontal = vScale.isHorizontal();\n const ruler = this._getRuler();\n const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);\n\n for (let i = start; i < start + count; i++) {\n const parsed = this.getParsed(i);\n const vpixels = reset || isNullOrUndef(parsed[vScale.axis]) ? {base, head: base} : this._calculateBarValuePixels(i);\n const ipixels = this._calculateBarIndexPixels(i, ruler);\n const stack = (parsed._stacks || {})[vScale.axis];\n\n const properties = {\n horizontal,\n base: vpixels.base,\n enableBorderRadius: !stack || isFloatBar(parsed._custom) || (index === stack._top || index === stack._bottom),\n x: horizontal ? vpixels.head : ipixels.center,\n y: horizontal ? ipixels.center : vpixels.head,\n height: horizontal ? ipixels.size : Math.abs(vpixels.size),\n width: horizontal ? Math.abs(vpixels.size) : ipixels.size\n };\n\n if (includeOptions) {\n properties.options = sharedOptions || this.resolveDataElementOptions(i, bars[i].active ? 'active' : mode);\n }\n const options = properties.options || bars[i].options;\n setBorderSkipped(properties, options, stack, index);\n setInflateAmount(properties, options, ruler.ratio);\n this.updateElement(bars[i], i, properties, mode);\n }\n }\n\n /**\n\t * Returns the stacks based on groups and bar visibility.\n\t * @param {number} [last] - The dataset index\n\t * @param {number} [dataIndex] - The data index of the ruler\n\t * @returns {string[]} The list of stack IDs\n\t * @private\n\t */\n _getStacks(last, dataIndex) {\n const {iScale} = this._cachedMeta;\n const metasets = iScale.getMatchingVisibleMetas(this._type)\n .filter(meta => meta.controller.options.grouped);\n const stacked = iScale.options.stacked;\n const stacks = [];\n\n const skipNull = (meta) => {\n const parsed = meta.controller.getParsed(dataIndex);\n const val = parsed && parsed[meta.vScale.axis];\n\n if (isNullOrUndef(val) || isNaN(val)) {\n return true;\n }\n };\n\n for (const meta of metasets) {\n if (dataIndex !== undefined && skipNull(meta)) {\n continue;\n }\n\n // stacked | meta.stack\n // | found | not found | undefined\n // false | x | x | x\n // true | | x |\n // undefined | | x | x\n if (stacked === false || stacks.indexOf(meta.stack) === -1 ||\n\t\t\t\t(stacked === undefined && meta.stack === undefined)) {\n stacks.push(meta.stack);\n }\n if (meta.index === last) {\n break;\n }\n }\n\n // No stacks? that means there is no visible data. Let's still initialize an `undefined`\n // stack where possible invisible bars will be located.\n // https://github.com/chartjs/Chart.js/issues/6368\n if (!stacks.length) {\n stacks.push(undefined);\n }\n\n return stacks;\n }\n\n /**\n\t * Returns the effective number of stacks based on groups and bar visibility.\n\t * @private\n\t */\n _getStackCount(index) {\n return this._getStacks(undefined, index).length;\n }\n\n /**\n\t * Returns the stack index for the given dataset based on groups and bar visibility.\n\t * @param {number} [datasetIndex] - The dataset index\n\t * @param {string} [name] - The stack name to find\n * @param {number} [dataIndex]\n\t * @returns {number} The stack index\n\t * @private\n\t */\n _getStackIndex(datasetIndex, name, dataIndex) {\n const stacks = this._getStacks(datasetIndex, dataIndex);\n const index = (name !== undefined)\n ? stacks.indexOf(name)\n : -1; // indexOf returns -1 if element is not present\n\n return (index === -1)\n ? stacks.length - 1\n : index;\n }\n\n /**\n\t * @private\n\t */\n _getRuler() {\n const opts = this.options;\n const meta = this._cachedMeta;\n const iScale = meta.iScale;\n const pixels = [];\n let i, ilen;\n\n for (i = 0, ilen = meta.data.length; i < ilen; ++i) {\n pixels.push(iScale.getPixelForValue(this.getParsed(i)[iScale.axis], i));\n }\n\n const barThickness = opts.barThickness;\n const min = barThickness || computeMinSampleSize(meta);\n\n return {\n min,\n pixels,\n start: iScale._startPixel,\n end: iScale._endPixel,\n stackCount: this._getStackCount(),\n scale: iScale,\n grouped: opts.grouped,\n // bar thickness ratio used for non-grouped bars\n ratio: barThickness ? 1 : opts.categoryPercentage * opts.barPercentage\n };\n }\n\n /**\n\t * Note: pixel values are not clamped to the scale area.\n\t * @private\n\t */\n _calculateBarValuePixels(index) {\n const {_cachedMeta: {vScale, _stacked, index: datasetIndex}, options: {base: baseValue, minBarLength}} = this;\n const actualBase = baseValue || 0;\n const parsed = this.getParsed(index);\n const custom = parsed._custom;\n const floating = isFloatBar(custom);\n let value = parsed[vScale.axis];\n let start = 0;\n let length = _stacked ? this.applyStack(vScale, parsed, _stacked) : value;\n let head, size;\n\n if (length !== value) {\n start = length - value;\n length = value;\n }\n\n if (floating) {\n value = custom.barStart;\n length = custom.barEnd - custom.barStart;\n // bars crossing origin are not stacked\n if (value !== 0 && sign(value) !== sign(custom.barEnd)) {\n start = 0;\n }\n start += value;\n }\n\n const startValue = !isNullOrUndef(baseValue) && !floating ? baseValue : start;\n let base = vScale.getPixelForValue(startValue);\n\n if (this.chart.getDataVisibility(index)) {\n head = vScale.getPixelForValue(start + length);\n } else {\n // When not visible, no height\n head = base;\n }\n\n size = head - base;\n\n if (Math.abs(size) < minBarLength) {\n size = barSign(size, vScale, actualBase) * minBarLength;\n if (value === actualBase) {\n base -= size / 2;\n }\n const startPixel = vScale.getPixelForDecimal(0);\n const endPixel = vScale.getPixelForDecimal(1);\n const min = Math.min(startPixel, endPixel);\n const max = Math.max(startPixel, endPixel);\n base = Math.max(Math.min(base, max), min);\n head = base + size;\n\n if (_stacked && !floating) {\n // visual data coordinates after applying minBarLength\n parsed._stacks[vScale.axis]._visualValues[datasetIndex] = vScale.getValueForPixel(head) - vScale.getValueForPixel(base);\n }\n }\n\n if (base === vScale.getPixelForValue(actualBase)) {\n const halfGrid = sign(size) * vScale.getLineWidthForValue(actualBase) / 2;\n base += halfGrid;\n size -= halfGrid;\n }\n\n return {\n size,\n base,\n head,\n center: head + size / 2\n };\n }\n\n /**\n\t * @private\n\t */\n _calculateBarIndexPixels(index, ruler) {\n const scale = ruler.scale;\n const options = this.options;\n const skipNull = options.skipNull;\n const maxBarThickness = valueOrDefault(options.maxBarThickness, Infinity);\n let center, size;\n if (ruler.grouped) {\n const stackCount = skipNull ? this._getStackCount(index) : ruler.stackCount;\n const range = options.barThickness === 'flex'\n ? computeFlexCategoryTraits(index, ruler, options, stackCount)\n : computeFitCategoryTraits(index, ruler, options, stackCount);\n\n const stackIndex = this._getStackIndex(this.index, this._cachedMeta.stack, skipNull ? index : undefined);\n center = range.start + (range.chunk * stackIndex) + (range.chunk / 2);\n size = Math.min(maxBarThickness, range.chunk * range.ratio);\n } else {\n // For non-grouped bar charts, exact pixel values are used\n center = scale.getPixelForValue(this.getParsed(index)[scale.axis], index);\n size = Math.min(maxBarThickness, ruler.min * ruler.ratio);\n }\n\n return {\n base: center - size / 2,\n head: center + size / 2,\n center,\n size\n };\n }\n\n draw() {\n const meta = this._cachedMeta;\n const vScale = meta.vScale;\n const rects = meta.data;\n const ilen = rects.length;\n let i = 0;\n\n for (; i < ilen; ++i) {\n if (this.getParsed(i)[vScale.axis] !== null) {\n rects[i].draw(this._ctx);\n }\n }\n }\n\n}\n","import DatasetController from '../core/core.datasetController.js';\nimport {valueOrDefault} from '../helpers/helpers.core.js';\n\nexport default class BubbleController extends DatasetController {\n\n static id = 'bubble';\n\n /**\n * @type {any}\n */\n static defaults = {\n datasetElementType: false,\n dataElementType: 'point',\n\n animations: {\n numbers: {\n type: 'number',\n properties: ['x', 'y', 'borderWidth', 'radius']\n }\n }\n };\n\n /**\n * @type {any}\n */\n static overrides = {\n scales: {\n x: {\n type: 'linear'\n },\n y: {\n type: 'linear'\n }\n }\n };\n\n initialize() {\n this.enableOptionSharing = true;\n super.initialize();\n }\n\n /**\n\t * Parse array of primitive values\n\t * @protected\n\t */\n parsePrimitiveData(meta, data, start, count) {\n const parsed = super.parsePrimitiveData(meta, data, start, count);\n for (let i = 0; i < parsed.length; i++) {\n parsed[i]._custom = this.resolveDataElementOptions(i + start).radius;\n }\n return parsed;\n }\n\n /**\n\t * Parse array of arrays\n\t * @protected\n\t */\n parseArrayData(meta, data, start, count) {\n const parsed = super.parseArrayData(meta, data, start, count);\n for (let i = 0; i < parsed.length; i++) {\n const item = data[start + i];\n parsed[i]._custom = valueOrDefault(item[2], this.resolveDataElementOptions(i + start).radius);\n }\n return parsed;\n }\n\n /**\n\t * Parse array of objects\n\t * @protected\n\t */\n parseObjectData(meta, data, start, count) {\n const parsed = super.parseObjectData(meta, data, start, count);\n for (let i = 0; i < parsed.length; i++) {\n const item = data[start + i];\n parsed[i]._custom = valueOrDefault(item && item.r && +item.r, this.resolveDataElementOptions(i + start).radius);\n }\n return parsed;\n }\n\n /**\n\t * @protected\n\t */\n getMaxOverflow() {\n const data = this._cachedMeta.data;\n\n let max = 0;\n for (let i = data.length - 1; i >= 0; --i) {\n max = Math.max(max, data[i].size(this.resolveDataElementOptions(i)) / 2);\n }\n return max > 0 && max;\n }\n\n /**\n\t * @protected\n\t */\n getLabelAndValue(index) {\n const meta = this._cachedMeta;\n const labels = this.chart.data.labels || [];\n const {xScale, yScale} = meta;\n const parsed = this.getParsed(index);\n const x = xScale.getLabelForValue(parsed.x);\n const y = yScale.getLabelForValue(parsed.y);\n const r = parsed._custom;\n\n return {\n label: labels[index] || '',\n value: '(' + x + ', ' + y + (r ? ', ' + r : '') + ')'\n };\n }\n\n update(mode) {\n const points = this._cachedMeta.data;\n\n // Update Points\n this.updateElements(points, 0, points.length, mode);\n }\n\n updateElements(points, start, count, mode) {\n const reset = mode === 'reset';\n const {iScale, vScale} = this._cachedMeta;\n const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);\n const iAxis = iScale.axis;\n const vAxis = vScale.axis;\n\n for (let i = start; i < start + count; i++) {\n const point = points[i];\n const parsed = !reset && this.getParsed(i);\n const properties = {};\n const iPixel = properties[iAxis] = reset ? iScale.getPixelForDecimal(0.5) : iScale.getPixelForValue(parsed[iAxis]);\n const vPixel = properties[vAxis] = reset ? vScale.getBasePixel() : vScale.getPixelForValue(parsed[vAxis]);\n\n properties.skip = isNaN(iPixel) || isNaN(vPixel);\n\n if (includeOptions) {\n properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);\n\n if (reset) {\n properties.options.radius = 0;\n }\n }\n\n this.updateElement(point, i, properties, mode);\n }\n }\n\n /**\n\t * @param {number} index\n\t * @param {string} [mode]\n\t * @protected\n\t */\n resolveDataElementOptions(index, mode) {\n const parsed = this.getParsed(index);\n let values = super.resolveDataElementOptions(index, mode);\n\n // In case values were cached (and thus frozen), we need to clone the values\n if (values.$shared) {\n values = Object.assign({}, values, {$shared: false});\n }\n\n // Custom radius resolution\n const radius = values.radius;\n if (mode !== 'active') {\n values.radius = 0;\n }\n values.radius += valueOrDefault(parsed && parsed._custom, radius);\n\n return values;\n }\n}\n","import DatasetController from '../core/core.datasetController.js';\nimport {isObject, resolveObjectKey, toPercentage, toDimension, valueOrDefault} from '../helpers/helpers.core.js';\nimport {formatNumber} from '../helpers/helpers.intl.js';\nimport {toRadians, PI, TAU, HALF_PI, _angleBetween} from '../helpers/helpers.math.js';\n\n/**\n * @typedef { import('../core/core.controller.js').default } Chart\n */\n\nfunction getRatioAndOffset(rotation, circumference, cutout) {\n let ratioX = 1;\n let ratioY = 1;\n let offsetX = 0;\n let offsetY = 0;\n // If the chart's circumference isn't a full circle, calculate size as a ratio of the width/height of the arc\n if (circumference < TAU) {\n const startAngle = rotation;\n const endAngle = startAngle + circumference;\n const startX = Math.cos(startAngle);\n const startY = Math.sin(startAngle);\n const endX = Math.cos(endAngle);\n const endY = Math.sin(endAngle);\n const calcMax = (angle, a, b) => _angleBetween(angle, startAngle, endAngle, true) ? 1 : Math.max(a, a * cutout, b, b * cutout);\n const calcMin = (angle, a, b) => _angleBetween(angle, startAngle, endAngle, true) ? -1 : Math.min(a, a * cutout, b, b * cutout);\n const maxX = calcMax(0, startX, endX);\n const maxY = calcMax(HALF_PI, startY, endY);\n const minX = calcMin(PI, startX, endX);\n const minY = calcMin(PI + HALF_PI, startY, endY);\n ratioX = (maxX - minX) / 2;\n ratioY = (maxY - minY) / 2;\n offsetX = -(maxX + minX) / 2;\n offsetY = -(maxY + minY) / 2;\n }\n return {ratioX, ratioY, offsetX, offsetY};\n}\n\nexport default class DoughnutController extends DatasetController {\n\n static id = 'doughnut';\n\n /**\n * @type {any}\n */\n static defaults = {\n datasetElementType: false,\n dataElementType: 'arc',\n animation: {\n // Boolean - Whether we animate the rotation of the Doughnut\n animateRotate: true,\n // Boolean - Whether we animate scaling the Doughnut from the centre\n animateScale: false\n },\n animations: {\n numbers: {\n type: 'number',\n properties: ['circumference', 'endAngle', 'innerRadius', 'outerRadius', 'startAngle', 'x', 'y', 'offset', 'borderWidth', 'spacing']\n },\n },\n // The percentage of the chart that we cut out of the middle.\n cutout: '50%',\n\n // The rotation of the chart, where the first data arc begins.\n rotation: 0,\n\n // The total circumference of the chart.\n circumference: 360,\n\n // The outer radius of the chart\n radius: '100%',\n\n // Spacing between arcs\n spacing: 0,\n\n indexAxis: 'r',\n };\n\n static descriptors = {\n _scriptable: (name) => name !== 'spacing',\n _indexable: (name) => name !== 'spacing' && !name.startsWith('borderDash') && !name.startsWith('hoverBorderDash'),\n };\n\n /**\n * @type {any}\n */\n static overrides = {\n aspectRatio: 1,\n\n // Need to override these to give a nice default\n plugins: {\n legend: {\n labels: {\n generateLabels(chart) {\n const data = chart.data;\n if (data.labels.length && data.datasets.length) {\n const {labels: {pointStyle, color}} = chart.legend.options;\n\n return data.labels.map((label, i) => {\n const meta = chart.getDatasetMeta(0);\n const style = meta.controller.getStyle(i);\n\n return {\n text: label,\n fillStyle: style.backgroundColor,\n strokeStyle: style.borderColor,\n fontColor: color,\n lineWidth: style.borderWidth,\n pointStyle: pointStyle,\n hidden: !chart.getDataVisibility(i),\n\n // Extra data used for toggling the correct item\n index: i\n };\n });\n }\n return [];\n }\n },\n\n onClick(e, legendItem, legend) {\n legend.chart.toggleDataVisibility(legendItem.index);\n legend.chart.update();\n }\n }\n }\n };\n\n constructor(chart, datasetIndex) {\n super(chart, datasetIndex);\n\n this.enableOptionSharing = true;\n this.innerRadius = undefined;\n this.outerRadius = undefined;\n this.offsetX = undefined;\n this.offsetY = undefined;\n }\n\n linkScales() {}\n\n /**\n\t * Override data parsing, since we are not using scales\n\t */\n parse(start, count) {\n const data = this.getDataset().data;\n const meta = this._cachedMeta;\n\n if (this._parsing === false) {\n meta._parsed = data;\n } else {\n let getter = (i) => +data[i];\n\n if (isObject(data[start])) {\n const {key = 'value'} = this._parsing;\n getter = (i) => +resolveObjectKey(data[i], key);\n }\n\n let i, ilen;\n for (i = start, ilen = start + count; i < ilen; ++i) {\n meta._parsed[i] = getter(i);\n }\n }\n }\n\n /**\n\t * @private\n\t */\n _getRotation() {\n return toRadians(this.options.rotation - 90);\n }\n\n /**\n\t * @private\n\t */\n _getCircumference() {\n return toRadians(this.options.circumference);\n }\n\n /**\n\t * Get the maximal rotation & circumference extents\n\t * across all visible datasets.\n\t */\n _getRotationExtents() {\n let min = TAU;\n let max = -TAU;\n\n for (let i = 0; i < this.chart.data.datasets.length; ++i) {\n if (this.chart.isDatasetVisible(i) && this.chart.getDatasetMeta(i).type === this._type) {\n const controller = this.chart.getDatasetMeta(i).controller;\n const rotation = controller._getRotation();\n const circumference = controller._getCircumference();\n\n min = Math.min(min, rotation);\n max = Math.max(max, rotation + circumference);\n }\n }\n\n return {\n rotation: min,\n circumference: max - min,\n };\n }\n\n /**\n\t * @param {string} mode\n\t */\n update(mode) {\n const chart = this.chart;\n const {chartArea} = chart;\n const meta = this._cachedMeta;\n const arcs = meta.data;\n const spacing = this.getMaxBorderWidth() + this.getMaxOffset(arcs) + this.options.spacing;\n const maxSize = Math.max((Math.min(chartArea.width, chartArea.height) - spacing) / 2, 0);\n const cutout = Math.min(toPercentage(this.options.cutout, maxSize), 1);\n const chartWeight = this._getRingWeight(this.index);\n\n // Compute the maximal rotation & circumference limits.\n // If we only consider our dataset, this can cause problems when two datasets\n // are both less than a circle with different rotations (starting angles)\n const {circumference, rotation} = this._getRotationExtents();\n const {ratioX, ratioY, offsetX, offsetY} = getRatioAndOffset(rotation, circumference, cutout);\n const maxWidth = (chartArea.width - spacing) / ratioX;\n const maxHeight = (chartArea.height - spacing) / ratioY;\n const maxRadius = Math.max(Math.min(maxWidth, maxHeight) / 2, 0);\n const outerRadius = toDimension(this.options.radius, maxRadius);\n const innerRadius = Math.max(outerRadius * cutout, 0);\n const radiusLength = (outerRadius - innerRadius) / this._getVisibleDatasetWeightTotal();\n this.offsetX = offsetX * outerRadius;\n this.offsetY = offsetY * outerRadius;\n\n meta.total = this.calculateTotal();\n\n this.outerRadius = outerRadius - radiusLength * this._getRingWeightOffset(this.index);\n this.innerRadius = Math.max(this.outerRadius - radiusLength * chartWeight, 0);\n\n this.updateElements(arcs, 0, arcs.length, mode);\n }\n\n /**\n * @private\n */\n _circumference(i, reset) {\n const opts = this.options;\n const meta = this._cachedMeta;\n const circumference = this._getCircumference();\n if ((reset && opts.animation.animateRotate) || !this.chart.getDataVisibility(i) || meta._parsed[i] === null || meta.data[i].hidden) {\n return 0;\n }\n return this.calculateCircumference(meta._parsed[i] * circumference / TAU);\n }\n\n updateElements(arcs, start, count, mode) {\n const reset = mode === 'reset';\n const chart = this.chart;\n const chartArea = chart.chartArea;\n const opts = chart.options;\n const animationOpts = opts.animation;\n const centerX = (chartArea.left + chartArea.right) / 2;\n const centerY = (chartArea.top + chartArea.bottom) / 2;\n const animateScale = reset && animationOpts.animateScale;\n const innerRadius = animateScale ? 0 : this.innerRadius;\n const outerRadius = animateScale ? 0 : this.outerRadius;\n const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);\n let startAngle = this._getRotation();\n let i;\n\n for (i = 0; i < start; ++i) {\n startAngle += this._circumference(i, reset);\n }\n\n for (i = start; i < start + count; ++i) {\n const circumference = this._circumference(i, reset);\n const arc = arcs[i];\n const properties = {\n x: centerX + this.offsetX,\n y: centerY + this.offsetY,\n startAngle,\n endAngle: startAngle + circumference,\n circumference,\n outerRadius,\n innerRadius\n };\n if (includeOptions) {\n properties.options = sharedOptions || this.resolveDataElementOptions(i, arc.active ? 'active' : mode);\n }\n startAngle += circumference;\n\n this.updateElement(arc, i, properties, mode);\n }\n }\n\n calculateTotal() {\n const meta = this._cachedMeta;\n const metaData = meta.data;\n let total = 0;\n let i;\n\n for (i = 0; i < metaData.length; i++) {\n const value = meta._parsed[i];\n if (value !== null && !isNaN(value) && this.chart.getDataVisibility(i) && !metaData[i].hidden) {\n total += Math.abs(value);\n }\n }\n\n return total;\n }\n\n calculateCircumference(value) {\n const total = this._cachedMeta.total;\n if (total > 0 && !isNaN(value)) {\n return TAU * (Math.abs(value) / total);\n }\n return 0;\n }\n\n getLabelAndValue(index) {\n const meta = this._cachedMeta;\n const chart = this.chart;\n const labels = chart.data.labels || [];\n const value = formatNumber(meta._parsed[index], chart.options.locale);\n\n return {\n label: labels[index] || '',\n value,\n };\n }\n\n getMaxBorderWidth(arcs) {\n let max = 0;\n const chart = this.chart;\n let i, ilen, meta, controller, options;\n\n if (!arcs) {\n // Find the outmost visible dataset\n for (i = 0, ilen = chart.data.datasets.length; i < ilen; ++i) {\n if (chart.isDatasetVisible(i)) {\n meta = chart.getDatasetMeta(i);\n arcs = meta.data;\n controller = meta.controller;\n break;\n }\n }\n }\n\n if (!arcs) {\n return 0;\n }\n\n for (i = 0, ilen = arcs.length; i < ilen; ++i) {\n options = controller.resolveDataElementOptions(i);\n if (options.borderAlign !== 'inner') {\n max = Math.max(max, options.borderWidth || 0, options.hoverBorderWidth || 0);\n }\n }\n return max;\n }\n\n getMaxOffset(arcs) {\n let max = 0;\n\n for (let i = 0, ilen = arcs.length; i < ilen; ++i) {\n const options = this.resolveDataElementOptions(i);\n max = Math.max(max, options.offset || 0, options.hoverOffset || 0);\n }\n return max;\n }\n\n /**\n\t * Get radius length offset of the dataset in relation to the visible datasets weights. This allows determining the inner and outer radius correctly\n\t * @private\n\t */\n _getRingWeightOffset(datasetIndex) {\n let ringWeightOffset = 0;\n\n for (let i = 0; i < datasetIndex; ++i) {\n if (this.chart.isDatasetVisible(i)) {\n ringWeightOffset += this._getRingWeight(i);\n }\n }\n\n return ringWeightOffset;\n }\n\n /**\n\t * @private\n\t */\n _getRingWeight(datasetIndex) {\n return Math.max(valueOrDefault(this.chart.data.datasets[datasetIndex].weight, 1), 0);\n }\n\n /**\n\t * Returns the sum of all visible data set weights.\n\t * @private\n\t */\n _getVisibleDatasetWeightTotal() {\n return this._getRingWeightOffset(this.chart.data.datasets.length) || 1;\n }\n}\n","import DatasetController from '../core/core.datasetController.js';\nimport {isNullOrUndef} from '../helpers/index.js';\nimport {isNumber} from '../helpers/helpers.math.js';\nimport {_getStartAndCountOfVisiblePoints, _scaleRangesChanged} from '../helpers/helpers.extras.js';\n\nexport default class LineController extends DatasetController {\n\n static id = 'line';\n\n /**\n * @type {any}\n */\n static defaults = {\n datasetElementType: 'line',\n dataElementType: 'point',\n\n showLine: true,\n spanGaps: false,\n };\n\n /**\n * @type {any}\n */\n static overrides = {\n scales: {\n _index_: {\n type: 'category',\n },\n _value_: {\n type: 'linear',\n },\n }\n };\n\n initialize() {\n this.enableOptionSharing = true;\n this.supportsDecimation = true;\n super.initialize();\n }\n\n update(mode) {\n const meta = this._cachedMeta;\n const {dataset: line, data: points = [], _dataset} = meta;\n // @ts-ignore\n const animationsDisabled = this.chart._animationsDisabled;\n let {start, count} = _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled);\n\n this._drawStart = start;\n this._drawCount = count;\n\n if (_scaleRangesChanged(meta)) {\n start = 0;\n count = points.length;\n }\n\n // Update Line\n line._chart = this.chart;\n line._datasetIndex = this.index;\n line._decimated = !!_dataset._decimated;\n line.points = points;\n\n const options = this.resolveDatasetElementOptions(mode);\n if (!this.options.showLine) {\n options.borderWidth = 0;\n }\n options.segment = this.options.segment;\n this.updateElement(line, undefined, {\n animated: !animationsDisabled,\n options\n }, mode);\n\n // Update Points\n this.updateElements(points, start, count, mode);\n }\n\n updateElements(points, start, count, mode) {\n const reset = mode === 'reset';\n const {iScale, vScale, _stacked, _dataset} = this._cachedMeta;\n const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);\n const iAxis = iScale.axis;\n const vAxis = vScale.axis;\n const {spanGaps, segment} = this.options;\n const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;\n const directUpdate = this.chart._animationsDisabled || reset || mode === 'none';\n const end = start + count;\n const pointsCount = points.length;\n let prevParsed = start > 0 && this.getParsed(start - 1);\n\n for (let i = 0; i < pointsCount; ++i) {\n const point = points[i];\n const properties = directUpdate ? point : {};\n\n if (i < start || i >= end) {\n properties.skip = true;\n continue;\n }\n\n const parsed = this.getParsed(i);\n const nullData = isNullOrUndef(parsed[vAxis]);\n const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);\n const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? this.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);\n\n properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;\n properties.stop = i > 0 && (Math.abs(parsed[iAxis] - prevParsed[iAxis])) > maxGapLength;\n if (segment) {\n properties.parsed = parsed;\n properties.raw = _dataset.data[i];\n }\n\n if (includeOptions) {\n properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);\n }\n\n if (!directUpdate) {\n this.updateElement(point, i, properties, mode);\n }\n\n prevParsed = parsed;\n }\n }\n\n /**\n\t * @protected\n\t */\n getMaxOverflow() {\n const meta = this._cachedMeta;\n const dataset = meta.dataset;\n const border = dataset.options && dataset.options.borderWidth || 0;\n const data = meta.data || [];\n if (!data.length) {\n return border;\n }\n const firstPoint = data[0].size(this.resolveDataElementOptions(0));\n const lastPoint = data[data.length - 1].size(this.resolveDataElementOptions(data.length - 1));\n return Math.max(border, firstPoint, lastPoint) / 2;\n }\n\n draw() {\n const meta = this._cachedMeta;\n meta.dataset.updateControlPoints(this.chart.chartArea, meta.iScale.axis);\n super.draw();\n }\n}\n","import DatasetController from '../core/core.datasetController.js';\nimport {toRadians, PI, formatNumber, _parseObjectDataRadialScale} from '../helpers/index.js';\n\nexport default class PolarAreaController extends DatasetController {\n\n static id = 'polarArea';\n\n /**\n * @type {any}\n */\n static defaults = {\n dataElementType: 'arc',\n animation: {\n animateRotate: true,\n animateScale: true\n },\n animations: {\n numbers: {\n type: 'number',\n properties: ['x', 'y', 'startAngle', 'endAngle', 'innerRadius', 'outerRadius']\n },\n },\n indexAxis: 'r',\n startAngle: 0,\n };\n\n /**\n * @type {any}\n */\n static overrides = {\n aspectRatio: 1,\n\n plugins: {\n legend: {\n labels: {\n generateLabels(chart) {\n const data = chart.data;\n if (data.labels.length && data.datasets.length) {\n const {labels: {pointStyle, color}} = chart.legend.options;\n\n return data.labels.map((label, i) => {\n const meta = chart.getDatasetMeta(0);\n const style = meta.controller.getStyle(i);\n\n return {\n text: label,\n fillStyle: style.backgroundColor,\n strokeStyle: style.borderColor,\n fontColor: color,\n lineWidth: style.borderWidth,\n pointStyle: pointStyle,\n hidden: !chart.getDataVisibility(i),\n\n // Extra data used for toggling the correct item\n index: i\n };\n });\n }\n return [];\n }\n },\n\n onClick(e, legendItem, legend) {\n legend.chart.toggleDataVisibility(legendItem.index);\n legend.chart.update();\n }\n }\n },\n\n scales: {\n r: {\n type: 'radialLinear',\n angleLines: {\n display: false\n },\n beginAtZero: true,\n grid: {\n circular: true\n },\n pointLabels: {\n display: false\n },\n startAngle: 0\n }\n }\n };\n\n constructor(chart, datasetIndex) {\n super(chart, datasetIndex);\n\n this.innerRadius = undefined;\n this.outerRadius = undefined;\n }\n\n getLabelAndValue(index) {\n const meta = this._cachedMeta;\n const chart = this.chart;\n const labels = chart.data.labels || [];\n const value = formatNumber(meta._parsed[index].r, chart.options.locale);\n\n return {\n label: labels[index] || '',\n value,\n };\n }\n\n parseObjectData(meta, data, start, count) {\n return _parseObjectDataRadialScale.bind(this)(meta, data, start, count);\n }\n\n update(mode) {\n const arcs = this._cachedMeta.data;\n\n this._updateRadius();\n this.updateElements(arcs, 0, arcs.length, mode);\n }\n\n /**\n * @protected\n */\n getMinMax() {\n const meta = this._cachedMeta;\n const range = {min: Number.POSITIVE_INFINITY, max: Number.NEGATIVE_INFINITY};\n\n meta.data.forEach((element, index) => {\n const parsed = this.getParsed(index).r;\n\n if (!isNaN(parsed) && this.chart.getDataVisibility(index)) {\n if (parsed < range.min) {\n range.min = parsed;\n }\n\n if (parsed > range.max) {\n range.max = parsed;\n }\n }\n });\n\n return range;\n }\n\n /**\n\t * @private\n\t */\n _updateRadius() {\n const chart = this.chart;\n const chartArea = chart.chartArea;\n const opts = chart.options;\n const minSize = Math.min(chartArea.right - chartArea.left, chartArea.bottom - chartArea.top);\n\n const outerRadius = Math.max(minSize / 2, 0);\n const innerRadius = Math.max(opts.cutoutPercentage ? (outerRadius / 100) * (opts.cutoutPercentage) : 1, 0);\n const radiusLength = (outerRadius - innerRadius) / chart.getVisibleDatasetCount();\n\n this.outerRadius = outerRadius - (radiusLength * this.index);\n this.innerRadius = this.outerRadius - radiusLength;\n }\n\n updateElements(arcs, start, count, mode) {\n const reset = mode === 'reset';\n const chart = this.chart;\n const opts = chart.options;\n const animationOpts = opts.animation;\n const scale = this._cachedMeta.rScale;\n const centerX = scale.xCenter;\n const centerY = scale.yCenter;\n const datasetStartAngle = scale.getIndexAngle(0) - 0.5 * PI;\n let angle = datasetStartAngle;\n let i;\n\n const defaultAngle = 360 / this.countVisibleElements();\n\n for (i = 0; i < start; ++i) {\n angle += this._computeAngle(i, mode, defaultAngle);\n }\n for (i = start; i < start + count; i++) {\n const arc = arcs[i];\n let startAngle = angle;\n let endAngle = angle + this._computeAngle(i, mode, defaultAngle);\n let outerRadius = chart.getDataVisibility(i) ? scale.getDistanceFromCenterForValue(this.getParsed(i).r) : 0;\n angle = endAngle;\n\n if (reset) {\n if (animationOpts.animateScale) {\n outerRadius = 0;\n }\n if (animationOpts.animateRotate) {\n startAngle = endAngle = datasetStartAngle;\n }\n }\n\n const properties = {\n x: centerX,\n y: centerY,\n innerRadius: 0,\n outerRadius,\n startAngle,\n endAngle,\n options: this.resolveDataElementOptions(i, arc.active ? 'active' : mode)\n };\n\n this.updateElement(arc, i, properties, mode);\n }\n }\n\n countVisibleElements() {\n const meta = this._cachedMeta;\n let count = 0;\n\n meta.data.forEach((element, index) => {\n if (!isNaN(this.getParsed(index).r) && this.chart.getDataVisibility(index)) {\n count++;\n }\n });\n\n return count;\n }\n\n /**\n\t * @private\n\t */\n _computeAngle(index, mode, defaultAngle) {\n return this.chart.getDataVisibility(index)\n ? toRadians(this.resolveDataElementOptions(index, mode).angle || defaultAngle)\n : 0;\n }\n}\n","import DoughnutController from './controller.doughnut.js';\n\n// Pie charts are Doughnut chart with different defaults\nexport default class PieController extends DoughnutController {\n\n static id = 'pie';\n\n /**\n * @type {any}\n */\n static defaults = {\n // The percentage of the chart that we cut out of the middle.\n cutout: 0,\n\n // The rotation of the chart, where the first data arc begins.\n rotation: 0,\n\n // The total circumference of the chart.\n circumference: 360,\n\n // The outer radius of the chart\n radius: '100%'\n };\n}\n","import DatasetController from '../core/core.datasetController.js';\nimport {_parseObjectDataRadialScale} from '../helpers/index.js';\n\nexport default class RadarController extends DatasetController {\n\n static id = 'radar';\n\n /**\n * @type {any}\n */\n static defaults = {\n datasetElementType: 'line',\n dataElementType: 'point',\n indexAxis: 'r',\n showLine: true,\n elements: {\n line: {\n fill: 'start'\n }\n },\n };\n\n /**\n * @type {any}\n */\n static overrides = {\n aspectRatio: 1,\n\n scales: {\n r: {\n type: 'radialLinear',\n }\n }\n };\n\n /**\n\t * @protected\n\t */\n getLabelAndValue(index) {\n const vScale = this._cachedMeta.vScale;\n const parsed = this.getParsed(index);\n\n return {\n label: vScale.getLabels()[index],\n value: '' + vScale.getLabelForValue(parsed[vScale.axis])\n };\n }\n\n parseObjectData(meta, data, start, count) {\n return _parseObjectDataRadialScale.bind(this)(meta, data, start, count);\n }\n\n update(mode) {\n const meta = this._cachedMeta;\n const line = meta.dataset;\n const points = meta.data || [];\n const labels = meta.iScale.getLabels();\n\n // Update Line\n line.points = points;\n // In resize mode only point locations change, so no need to set the points or options.\n if (mode !== 'resize') {\n const options = this.resolveDatasetElementOptions(mode);\n if (!this.options.showLine) {\n options.borderWidth = 0;\n }\n\n const properties = {\n _loop: true,\n _fullLoop: labels.length === points.length,\n options\n };\n\n this.updateElement(line, undefined, properties, mode);\n }\n\n // Update Points\n this.updateElements(points, 0, points.length, mode);\n }\n\n updateElements(points, start, count, mode) {\n const scale = this._cachedMeta.rScale;\n const reset = mode === 'reset';\n\n for (let i = start; i < start + count; i++) {\n const point = points[i];\n const options = this.resolveDataElementOptions(i, point.active ? 'active' : mode);\n const pointPosition = scale.getPointPositionForValue(i, this.getParsed(i).r);\n\n const x = reset ? scale.xCenter : pointPosition.x;\n const y = reset ? scale.yCenter : pointPosition.y;\n\n const properties = {\n x,\n y,\n angle: pointPosition.angle,\n skip: isNaN(x) || isNaN(y),\n options\n };\n\n this.updateElement(point, i, properties, mode);\n }\n }\n}\n","import DatasetController from '../core/core.datasetController.js';\nimport {isNullOrUndef} from '../helpers/index.js';\nimport {isNumber} from '../helpers/helpers.math.js';\nimport {_getStartAndCountOfVisiblePoints, _scaleRangesChanged} from '../helpers/helpers.extras.js';\n\nexport default class ScatterController extends DatasetController {\n\n static id = 'scatter';\n\n /**\n * @type {any}\n */\n static defaults = {\n datasetElementType: false,\n dataElementType: 'point',\n showLine: false,\n fill: false\n };\n\n /**\n * @type {any}\n */\n static overrides = {\n\n interaction: {\n mode: 'point'\n },\n\n scales: {\n x: {\n type: 'linear'\n },\n y: {\n type: 'linear'\n }\n }\n };\n\n /**\n\t * @protected\n\t */\n getLabelAndValue(index) {\n const meta = this._cachedMeta;\n const labels = this.chart.data.labels || [];\n const {xScale, yScale} = meta;\n const parsed = this.getParsed(index);\n const x = xScale.getLabelForValue(parsed.x);\n const y = yScale.getLabelForValue(parsed.y);\n\n return {\n label: labels[index] || '',\n value: '(' + x + ', ' + y + ')'\n };\n }\n\n update(mode) {\n const meta = this._cachedMeta;\n const {data: points = []} = meta;\n // @ts-ignore\n const animationsDisabled = this.chart._animationsDisabled;\n let {start, count} = _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled);\n\n this._drawStart = start;\n this._drawCount = count;\n\n if (_scaleRangesChanged(meta)) {\n start = 0;\n count = points.length;\n }\n\n if (this.options.showLine) {\n\n // https://github.com/chartjs/Chart.js/issues/11333\n if (!this.datasetElementType) {\n this.addElements();\n }\n const {dataset: line, _dataset} = meta;\n\n // Update Line\n line._chart = this.chart;\n line._datasetIndex = this.index;\n line._decimated = !!_dataset._decimated;\n line.points = points;\n\n const options = this.resolveDatasetElementOptions(mode);\n options.segment = this.options.segment;\n this.updateElement(line, undefined, {\n animated: !animationsDisabled,\n options\n }, mode);\n } else if (this.datasetElementType) {\n // https://github.com/chartjs/Chart.js/issues/11333\n delete meta.dataset;\n this.datasetElementType = false;\n }\n\n // Update Points\n this.updateElements(points, start, count, mode);\n }\n\n addElements() {\n const {showLine} = this.options;\n\n if (!this.datasetElementType && showLine) {\n this.datasetElementType = this.chart.registry.getElement('line');\n }\n\n super.addElements();\n }\n\n updateElements(points, start, count, mode) {\n const reset = mode === 'reset';\n const {iScale, vScale, _stacked, _dataset} = this._cachedMeta;\n const firstOpts = this.resolveDataElementOptions(start, mode);\n const sharedOptions = this.getSharedOptions(firstOpts);\n const includeOptions = this.includeOptions(mode, sharedOptions);\n const iAxis = iScale.axis;\n const vAxis = vScale.axis;\n const {spanGaps, segment} = this.options;\n const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;\n const directUpdate = this.chart._animationsDisabled || reset || mode === 'none';\n let prevParsed = start > 0 && this.getParsed(start - 1);\n\n for (let i = start; i < start + count; ++i) {\n const point = points[i];\n const parsed = this.getParsed(i);\n const properties = directUpdate ? point : {};\n const nullData = isNullOrUndef(parsed[vAxis]);\n const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);\n const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? this.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);\n\n properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;\n properties.stop = i > 0 && (Math.abs(parsed[iAxis] - prevParsed[iAxis])) > maxGapLength;\n if (segment) {\n properties.parsed = parsed;\n properties.raw = _dataset.data[i];\n }\n\n if (includeOptions) {\n properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);\n }\n\n if (!directUpdate) {\n this.updateElement(point, i, properties, mode);\n }\n\n prevParsed = parsed;\n }\n\n this.updateSharedOptions(sharedOptions, mode, firstOpts);\n }\n\n /**\n\t * @protected\n\t */\n getMaxOverflow() {\n const meta = this._cachedMeta;\n const data = meta.data || [];\n\n if (!this.options.showLine) {\n let max = 0;\n for (let i = data.length - 1; i >= 0; --i) {\n max = Math.max(max, data[i].size(this.resolveDataElementOptions(i)) / 2);\n }\n return max > 0 && max;\n }\n\n const dataset = meta.dataset;\n const border = dataset.options && dataset.options.borderWidth || 0;\n\n if (!data.length) {\n return border;\n }\n\n const firstPoint = data[0].size(this.resolveDataElementOptions(0));\n const lastPoint = data[data.length - 1].size(this.resolveDataElementOptions(data.length - 1));\n return Math.max(border, firstPoint, lastPoint) / 2;\n }\n}\n","/**\n * @namespace Chart._adapters\n * @since 2.8.0\n * @private\n */\n\nimport type {AnyObject} from '../types/basic.js';\nimport type {ChartOptions} from '../types/index.js';\n\nexport type TimeUnit = 'millisecond' | 'second' | 'minute' | 'hour' | 'day' | 'week' | 'month' | 'quarter' | 'year';\n\nexport interface DateAdapter {\n readonly options: T;\n /**\n * Will called with chart options after adapter creation.\n */\n init(this: DateAdapter, chartOptions: ChartOptions): void;\n /**\n * Returns a map of time formats for the supported formatting units defined\n * in Unit as well as 'datetime' representing a detailed date/time string.\n */\n formats(this: DateAdapter): Record;\n /**\n * Parses the given `value` and return the associated timestamp.\n * @param value - the value to parse (usually comes from the data)\n * @param [format] - the expected data format\n */\n parse(this: DateAdapter, value: unknown, format?: TimeUnit): number | null;\n /**\n * Returns the formatted date in the specified `format` for a given `timestamp`.\n * @param timestamp - the timestamp to format\n * @param format - the date/time token\n */\n format(this: DateAdapter, timestamp: number, format: TimeUnit): string;\n /**\n * Adds the specified `amount` of `unit` to the given `timestamp`.\n * @param timestamp - the input timestamp\n * @param amount - the amount to add\n * @param unit - the unit as string\n */\n add(this: DateAdapter, timestamp: number, amount: number, unit: TimeUnit): number;\n /**\n * Returns the number of `unit` between the given timestamps.\n * @param a - the input timestamp (reference)\n * @param b - the timestamp to subtract\n * @param unit - the unit as string\n */\n diff(this: DateAdapter, a: number, b: number, unit: TimeUnit): number;\n /**\n * Returns start of `unit` for the given `timestamp`.\n * @param timestamp - the input timestamp\n * @param unit - the unit as string\n * @param [weekday] - the ISO day of the week with 1 being Monday\n * and 7 being Sunday (only needed if param *unit* is `isoWeek`).\n */\n startOf(this: DateAdapter, timestamp: number, unit: TimeUnit | 'isoWeek', weekday?: number): number;\n /**\n * Returns end of `unit` for the given `timestamp`.\n * @param timestamp - the input timestamp\n * @param unit - the unit as string\n */\n endOf(this: DateAdapter, timestamp: number, unit: TimeUnit | 'isoWeek'): number;\n}\n\nfunction abstract(): T {\n throw new Error('This method is not implemented: Check that a complete date adapter is provided.');\n}\n\n/**\n * Date adapter (current used by the time scale)\n * @namespace Chart._adapters._date\n * @memberof Chart._adapters\n * @private\n */\nclass DateAdapterBase implements DateAdapter {\n\n /**\n * Override default date adapter methods.\n * Accepts type parameter to define options type.\n * @example\n * Chart._adapters._date.override<{myAdapterOption: string}>({\n * init() {\n * console.log(this.options.myAdapterOption);\n * }\n * })\n */\n static override(\n members: Partial, 'options'>>\n ) {\n Object.assign(DateAdapterBase.prototype, members);\n }\n\n readonly options: AnyObject;\n\n constructor(options: AnyObject) {\n this.options = options || {};\n }\n\n // eslint-disable-next-line @typescript-eslint/no-empty-function\n init() {}\n\n formats(): Record {\n return abstract();\n }\n\n parse(): number | null {\n return abstract();\n }\n\n format(): string {\n return abstract();\n }\n\n add(): number {\n return abstract();\n }\n\n diff(): number {\n return abstract();\n }\n\n startOf(): number {\n return abstract();\n }\n\n endOf(): number {\n return abstract();\n }\n}\n\nexport default {\n _date: DateAdapterBase\n};\n","import {_lookupByKey, _rlookupByKey} from '../helpers/helpers.collection.js';\nimport {getRelativePosition} from '../helpers/helpers.dom.js';\nimport {_angleBetween, getAngleFromPoint} from '../helpers/helpers.math.js';\nimport {_isPointInArea} from '../helpers/index.js';\n\n/**\n * @typedef { import('./core.controller.js').default } Chart\n * @typedef { import('../types/index.js').ChartEvent } ChartEvent\n * @typedef {{axis?: string, intersect?: boolean, includeInvisible?: boolean}} InteractionOptions\n * @typedef {{datasetIndex: number, index: number, element: import('./core.element.js').default}} InteractionItem\n * @typedef { import('../types/index.js').Point } Point\n */\n\n/**\n * Helper function to do binary search when possible\n * @param {object} metaset - the dataset meta\n * @param {string} axis - the axis mode. x|y|xy|r\n * @param {number} value - the value to find\n * @param {boolean} [intersect] - should the element intersect\n * @returns {{lo:number, hi:number}} indices to search data array between\n */\nfunction binarySearch(metaset, axis, value, intersect) {\n const {controller, data, _sorted} = metaset;\n const iScale = controller._cachedMeta.iScale;\n if (iScale && axis === iScale.axis && axis !== 'r' && _sorted && data.length) {\n const lookupMethod = iScale._reversePixels ? _rlookupByKey : _lookupByKey;\n if (!intersect) {\n return lookupMethod(data, axis, value);\n } else if (controller._sharedOptions) {\n // _sharedOptions indicates that each element has equal options -> equal proportions\n // So we can do a ranged binary search based on the range of first element and\n // be confident to get the full range of indices that can intersect with the value.\n const el = data[0];\n const range = typeof el.getRange === 'function' && el.getRange(axis);\n if (range) {\n const start = lookupMethod(data, axis, value - range);\n const end = lookupMethod(data, axis, value + range);\n return {lo: start.lo, hi: end.hi};\n }\n }\n }\n // Default to all elements, when binary search can not be used.\n return {lo: 0, hi: data.length - 1};\n}\n\n/**\n * Helper function to select candidate elements for interaction\n * @param {Chart} chart - the chart\n * @param {string} axis - the axis mode. x|y|xy|r\n * @param {Point} position - the point to be nearest to, in relative coordinates\n * @param {function} handler - the callback to execute for each visible item\n * @param {boolean} [intersect] - consider intersecting items\n */\nfunction evaluateInteractionItems(chart, axis, position, handler, intersect) {\n const metasets = chart.getSortedVisibleDatasetMetas();\n const value = position[axis];\n for (let i = 0, ilen = metasets.length; i < ilen; ++i) {\n const {index, data} = metasets[i];\n const {lo, hi} = binarySearch(metasets[i], axis, value, intersect);\n for (let j = lo; j <= hi; ++j) {\n const element = data[j];\n if (!element.skip) {\n handler(element, index, j);\n }\n }\n }\n}\n\n/**\n * Get a distance metric function for two points based on the\n * axis mode setting\n * @param {string} axis - the axis mode. x|y|xy|r\n */\nfunction getDistanceMetricForAxis(axis) {\n const useX = axis.indexOf('x') !== -1;\n const useY = axis.indexOf('y') !== -1;\n\n return function(pt1, pt2) {\n const deltaX = useX ? Math.abs(pt1.x - pt2.x) : 0;\n const deltaY = useY ? Math.abs(pt1.y - pt2.y) : 0;\n return Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2));\n };\n}\n\n/**\n * Helper function to get the items that intersect the event position\n * @param {Chart} chart - the chart\n * @param {Point} position - the point to be nearest to, in relative coordinates\n * @param {string} axis - the axis mode. x|y|xy|r\n * @param {boolean} [useFinalPosition] - use the element's animation target instead of current position\n * @param {boolean} [includeInvisible] - include invisible points that are outside of the chart area\n * @return {InteractionItem[]} the nearest items\n */\nfunction getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) {\n const items = [];\n\n if (!includeInvisible && !chart.isPointInArea(position)) {\n return items;\n }\n\n const evaluationFunc = function(element, datasetIndex, index) {\n if (!includeInvisible && !_isPointInArea(element, chart.chartArea, 0)) {\n return;\n }\n if (element.inRange(position.x, position.y, useFinalPosition)) {\n items.push({element, datasetIndex, index});\n }\n };\n\n evaluateInteractionItems(chart, axis, position, evaluationFunc, true);\n return items;\n}\n\n/**\n * Helper function to get the items nearest to the event position for a radial chart\n * @param {Chart} chart - the chart to look at elements from\n * @param {Point} position - the point to be nearest to, in relative coordinates\n * @param {string} axis - the axes along which to measure distance\n * @param {boolean} [useFinalPosition] - use the element's animation target instead of current position\n * @return {InteractionItem[]} the nearest items\n */\nfunction getNearestRadialItems(chart, position, axis, useFinalPosition) {\n let items = [];\n\n function evaluationFunc(element, datasetIndex, index) {\n const {startAngle, endAngle} = element.getProps(['startAngle', 'endAngle'], useFinalPosition);\n const {angle} = getAngleFromPoint(element, {x: position.x, y: position.y});\n\n if (_angleBetween(angle, startAngle, endAngle)) {\n items.push({element, datasetIndex, index});\n }\n }\n\n evaluateInteractionItems(chart, axis, position, evaluationFunc);\n return items;\n}\n\n/**\n * Helper function to get the items nearest to the event position for a cartesian chart\n * @param {Chart} chart - the chart to look at elements from\n * @param {Point} position - the point to be nearest to, in relative coordinates\n * @param {string} axis - the axes along which to measure distance\n * @param {boolean} [intersect] - if true, only consider items that intersect the position\n * @param {boolean} [useFinalPosition] - use the element's animation target instead of current position\n * @param {boolean} [includeInvisible] - include invisible points that are outside of the chart area\n * @return {InteractionItem[]} the nearest items\n */\nfunction getNearestCartesianItems(chart, position, axis, intersect, useFinalPosition, includeInvisible) {\n let items = [];\n const distanceMetric = getDistanceMetricForAxis(axis);\n let minDistance = Number.POSITIVE_INFINITY;\n\n function evaluationFunc(element, datasetIndex, index) {\n const inRange = element.inRange(position.x, position.y, useFinalPosition);\n if (intersect && !inRange) {\n return;\n }\n\n const center = element.getCenterPoint(useFinalPosition);\n const pointInArea = !!includeInvisible || chart.isPointInArea(center);\n if (!pointInArea && !inRange) {\n return;\n }\n\n const distance = distanceMetric(position, center);\n if (distance < minDistance) {\n items = [{element, datasetIndex, index}];\n minDistance = distance;\n } else if (distance === minDistance) {\n // Can have multiple items at the same distance in which case we sort by size\n items.push({element, datasetIndex, index});\n }\n }\n\n evaluateInteractionItems(chart, axis, position, evaluationFunc);\n return items;\n}\n\n/**\n * Helper function to get the items nearest to the event position considering all visible items in the chart\n * @param {Chart} chart - the chart to look at elements from\n * @param {Point} position - the point to be nearest to, in relative coordinates\n * @param {string} axis - the axes along which to measure distance\n * @param {boolean} [intersect] - if true, only consider items that intersect the position\n * @param {boolean} [useFinalPosition] - use the element's animation target instead of current position\n * @param {boolean} [includeInvisible] - include invisible points that are outside of the chart area\n * @return {InteractionItem[]} the nearest items\n */\nfunction getNearestItems(chart, position, axis, intersect, useFinalPosition, includeInvisible) {\n if (!includeInvisible && !chart.isPointInArea(position)) {\n return [];\n }\n\n return axis === 'r' && !intersect\n ? getNearestRadialItems(chart, position, axis, useFinalPosition)\n : getNearestCartesianItems(chart, position, axis, intersect, useFinalPosition, includeInvisible);\n}\n\n/**\n * Helper function to get the items matching along the given X or Y axis\n * @param {Chart} chart - the chart to look at elements from\n * @param {Point} position - the point to be nearest to, in relative coordinates\n * @param {string} axis - the axis to match\n * @param {boolean} [intersect] - if true, only consider items that intersect the position\n * @param {boolean} [useFinalPosition] - use the element's animation target instead of current position\n * @return {InteractionItem[]} the nearest items\n */\nfunction getAxisItems(chart, position, axis, intersect, useFinalPosition) {\n const items = [];\n const rangeMethod = axis === 'x' ? 'inXRange' : 'inYRange';\n let intersectsItem = false;\n\n evaluateInteractionItems(chart, axis, position, (element, datasetIndex, index) => {\n if (element[rangeMethod](position[axis], useFinalPosition)) {\n items.push({element, datasetIndex, index});\n intersectsItem = intersectsItem || element.inRange(position.x, position.y, useFinalPosition);\n }\n });\n\n // If we want to trigger on an intersect and we don't have any items\n // that intersect the position, return nothing\n if (intersect && !intersectsItem) {\n return [];\n }\n return items;\n}\n\n/**\n * Contains interaction related functions\n * @namespace Chart.Interaction\n */\nexport default {\n // Part of the public API to facilitate developers creating their own modes\n evaluateInteractionItems,\n\n // Helper function for different modes\n modes: {\n /**\n\t\t * Returns items at the same index. If the options.intersect parameter is true, we only return items if we intersect something\n\t\t * If the options.intersect mode is false, we find the nearest item and return the items at the same index as that item\n\t\t * @function Chart.Interaction.modes.index\n\t\t * @since v2.4.0\n\t\t * @param {Chart} chart - the chart we are returning items from\n\t\t * @param {Event} e - the event we are find things at\n\t\t * @param {InteractionOptions} options - options to use\n\t\t * @param {boolean} [useFinalPosition] - use final element position (animation target)\n\t\t * @return {InteractionItem[]} - items that are found\n\t\t */\n index(chart, e, options, useFinalPosition) {\n const position = getRelativePosition(e, chart);\n // Default axis for index mode is 'x' to match old behaviour\n const axis = options.axis || 'x';\n const includeInvisible = options.includeInvisible || false;\n const items = options.intersect\n ? getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible)\n : getNearestItems(chart, position, axis, false, useFinalPosition, includeInvisible);\n const elements = [];\n\n if (!items.length) {\n return [];\n }\n\n chart.getSortedVisibleDatasetMetas().forEach((meta) => {\n const index = items[0].index;\n const element = meta.data[index];\n\n // don't count items that are skipped (null data)\n if (element && !element.skip) {\n elements.push({element, datasetIndex: meta.index, index});\n }\n });\n\n return elements;\n },\n\n /**\n\t\t * Returns items in the same dataset. If the options.intersect parameter is true, we only return items if we intersect something\n\t\t * If the options.intersect is false, we find the nearest item and return the items in that dataset\n\t\t * @function Chart.Interaction.modes.dataset\n\t\t * @param {Chart} chart - the chart we are returning items from\n\t\t * @param {Event} e - the event we are find things at\n\t\t * @param {InteractionOptions} options - options to use\n\t\t * @param {boolean} [useFinalPosition] - use final element position (animation target)\n\t\t * @return {InteractionItem[]} - items that are found\n\t\t */\n dataset(chart, e, options, useFinalPosition) {\n const position = getRelativePosition(e, chart);\n const axis = options.axis || 'xy';\n const includeInvisible = options.includeInvisible || false;\n let items = options.intersect\n ? getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) :\n getNearestItems(chart, position, axis, false, useFinalPosition, includeInvisible);\n\n if (items.length > 0) {\n const datasetIndex = items[0].datasetIndex;\n const data = chart.getDatasetMeta(datasetIndex).data;\n items = [];\n for (let i = 0; i < data.length; ++i) {\n items.push({element: data[i], datasetIndex, index: i});\n }\n }\n\n return items;\n },\n\n /**\n\t\t * Point mode returns all elements that hit test based on the event position\n\t\t * of the event\n\t\t * @function Chart.Interaction.modes.intersect\n\t\t * @param {Chart} chart - the chart we are returning items from\n\t\t * @param {Event} e - the event we are find things at\n\t\t * @param {InteractionOptions} options - options to use\n\t\t * @param {boolean} [useFinalPosition] - use final element position (animation target)\n\t\t * @return {InteractionItem[]} - items that are found\n\t\t */\n point(chart, e, options, useFinalPosition) {\n const position = getRelativePosition(e, chart);\n const axis = options.axis || 'xy';\n const includeInvisible = options.includeInvisible || false;\n return getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible);\n },\n\n /**\n\t\t * nearest mode returns the element closest to the point\n\t\t * @function Chart.Interaction.modes.intersect\n\t\t * @param {Chart} chart - the chart we are returning items from\n\t\t * @param {Event} e - the event we are find things at\n\t\t * @param {InteractionOptions} options - options to use\n\t\t * @param {boolean} [useFinalPosition] - use final element position (animation target)\n\t\t * @return {InteractionItem[]} - items that are found\n\t\t */\n nearest(chart, e, options, useFinalPosition) {\n const position = getRelativePosition(e, chart);\n const axis = options.axis || 'xy';\n const includeInvisible = options.includeInvisible || false;\n return getNearestItems(chart, position, axis, options.intersect, useFinalPosition, includeInvisible);\n },\n\n /**\n\t\t * x mode returns the elements that hit-test at the current x coordinate\n\t\t * @function Chart.Interaction.modes.x\n\t\t * @param {Chart} chart - the chart we are returning items from\n\t\t * @param {Event} e - the event we are find things at\n\t\t * @param {InteractionOptions} options - options to use\n\t\t * @param {boolean} [useFinalPosition] - use final element position (animation target)\n\t\t * @return {InteractionItem[]} - items that are found\n\t\t */\n x(chart, e, options, useFinalPosition) {\n const position = getRelativePosition(e, chart);\n return getAxisItems(chart, position, 'x', options.intersect, useFinalPosition);\n },\n\n /**\n\t\t * y mode returns the elements that hit-test at the current y coordinate\n\t\t * @function Chart.Interaction.modes.y\n\t\t * @param {Chart} chart - the chart we are returning items from\n\t\t * @param {Event} e - the event we are find things at\n\t\t * @param {InteractionOptions} options - options to use\n\t\t * @param {boolean} [useFinalPosition] - use final element position (animation target)\n\t\t * @return {InteractionItem[]} - items that are found\n\t\t */\n y(chart, e, options, useFinalPosition) {\n const position = getRelativePosition(e, chart);\n return getAxisItems(chart, position, 'y', options.intersect, useFinalPosition);\n }\n }\n};\n","import {defined, each, isObject} from '../helpers/helpers.core.js';\nimport {toPadding} from '../helpers/helpers.options.js';\n\n/**\n * @typedef { import('./core.controller.js').default } Chart\n */\n\nconst STATIC_POSITIONS = ['left', 'top', 'right', 'bottom'];\n\nfunction filterByPosition(array, position) {\n return array.filter(v => v.pos === position);\n}\n\nfunction filterDynamicPositionByAxis(array, axis) {\n return array.filter(v => STATIC_POSITIONS.indexOf(v.pos) === -1 && v.box.axis === axis);\n}\n\nfunction sortByWeight(array, reverse) {\n return array.sort((a, b) => {\n const v0 = reverse ? b : a;\n const v1 = reverse ? a : b;\n return v0.weight === v1.weight ?\n v0.index - v1.index :\n v0.weight - v1.weight;\n });\n}\n\nfunction wrapBoxes(boxes) {\n const layoutBoxes = [];\n let i, ilen, box, pos, stack, stackWeight;\n\n for (i = 0, ilen = (boxes || []).length; i < ilen; ++i) {\n box = boxes[i];\n ({position: pos, options: {stack, stackWeight = 1}} = box);\n layoutBoxes.push({\n index: i,\n box,\n pos,\n horizontal: box.isHorizontal(),\n weight: box.weight,\n stack: stack && (pos + stack),\n stackWeight\n });\n }\n return layoutBoxes;\n}\n\nfunction buildStacks(layouts) {\n const stacks = {};\n for (const wrap of layouts) {\n const {stack, pos, stackWeight} = wrap;\n if (!stack || !STATIC_POSITIONS.includes(pos)) {\n continue;\n }\n const _stack = stacks[stack] || (stacks[stack] = {count: 0, placed: 0, weight: 0, size: 0});\n _stack.count++;\n _stack.weight += stackWeight;\n }\n return stacks;\n}\n\n/**\n * store dimensions used instead of available chartArea in fitBoxes\n **/\nfunction setLayoutDims(layouts, params) {\n const stacks = buildStacks(layouts);\n const {vBoxMaxWidth, hBoxMaxHeight} = params;\n let i, ilen, layout;\n for (i = 0, ilen = layouts.length; i < ilen; ++i) {\n layout = layouts[i];\n const {fullSize} = layout.box;\n const stack = stacks[layout.stack];\n const factor = stack && layout.stackWeight / stack.weight;\n if (layout.horizontal) {\n layout.width = factor ? factor * vBoxMaxWidth : fullSize && params.availableWidth;\n layout.height = hBoxMaxHeight;\n } else {\n layout.width = vBoxMaxWidth;\n layout.height = factor ? factor * hBoxMaxHeight : fullSize && params.availableHeight;\n }\n }\n return stacks;\n}\n\nfunction buildLayoutBoxes(boxes) {\n const layoutBoxes = wrapBoxes(boxes);\n const fullSize = sortByWeight(layoutBoxes.filter(wrap => wrap.box.fullSize), true);\n const left = sortByWeight(filterByPosition(layoutBoxes, 'left'), true);\n const right = sortByWeight(filterByPosition(layoutBoxes, 'right'));\n const top = sortByWeight(filterByPosition(layoutBoxes, 'top'), true);\n const bottom = sortByWeight(filterByPosition(layoutBoxes, 'bottom'));\n const centerHorizontal = filterDynamicPositionByAxis(layoutBoxes, 'x');\n const centerVertical = filterDynamicPositionByAxis(layoutBoxes, 'y');\n\n return {\n fullSize,\n leftAndTop: left.concat(top),\n rightAndBottom: right.concat(centerVertical).concat(bottom).concat(centerHorizontal),\n chartArea: filterByPosition(layoutBoxes, 'chartArea'),\n vertical: left.concat(right).concat(centerVertical),\n horizontal: top.concat(bottom).concat(centerHorizontal)\n };\n}\n\nfunction getCombinedMax(maxPadding, chartArea, a, b) {\n return Math.max(maxPadding[a], chartArea[a]) + Math.max(maxPadding[b], chartArea[b]);\n}\n\nfunction updateMaxPadding(maxPadding, boxPadding) {\n maxPadding.top = Math.max(maxPadding.top, boxPadding.top);\n maxPadding.left = Math.max(maxPadding.left, boxPadding.left);\n maxPadding.bottom = Math.max(maxPadding.bottom, boxPadding.bottom);\n maxPadding.right = Math.max(maxPadding.right, boxPadding.right);\n}\n\nfunction updateDims(chartArea, params, layout, stacks) {\n const {pos, box} = layout;\n const maxPadding = chartArea.maxPadding;\n\n // dynamically placed boxes size is not considered\n if (!isObject(pos)) {\n if (layout.size) {\n // this layout was already counted for, lets first reduce old size\n chartArea[pos] -= layout.size;\n }\n const stack = stacks[layout.stack] || {size: 0, count: 1};\n stack.size = Math.max(stack.size, layout.horizontal ? box.height : box.width);\n layout.size = stack.size / stack.count;\n chartArea[pos] += layout.size;\n }\n\n if (box.getPadding) {\n updateMaxPadding(maxPadding, box.getPadding());\n }\n\n const newWidth = Math.max(0, params.outerWidth - getCombinedMax(maxPadding, chartArea, 'left', 'right'));\n const newHeight = Math.max(0, params.outerHeight - getCombinedMax(maxPadding, chartArea, 'top', 'bottom'));\n const widthChanged = newWidth !== chartArea.w;\n const heightChanged = newHeight !== chartArea.h;\n chartArea.w = newWidth;\n chartArea.h = newHeight;\n\n // return booleans on the changes per direction\n return layout.horizontal\n ? {same: widthChanged, other: heightChanged}\n : {same: heightChanged, other: widthChanged};\n}\n\nfunction handleMaxPadding(chartArea) {\n const maxPadding = chartArea.maxPadding;\n\n function updatePos(pos) {\n const change = Math.max(maxPadding[pos] - chartArea[pos], 0);\n chartArea[pos] += change;\n return change;\n }\n chartArea.y += updatePos('top');\n chartArea.x += updatePos('left');\n updatePos('right');\n updatePos('bottom');\n}\n\nfunction getMargins(horizontal, chartArea) {\n const maxPadding = chartArea.maxPadding;\n\n function marginForPositions(positions) {\n const margin = {left: 0, top: 0, right: 0, bottom: 0};\n positions.forEach((pos) => {\n margin[pos] = Math.max(chartArea[pos], maxPadding[pos]);\n });\n return margin;\n }\n\n return horizontal\n ? marginForPositions(['left', 'right'])\n : marginForPositions(['top', 'bottom']);\n}\n\nfunction fitBoxes(boxes, chartArea, params, stacks) {\n const refitBoxes = [];\n let i, ilen, layout, box, refit, changed;\n\n for (i = 0, ilen = boxes.length, refit = 0; i < ilen; ++i) {\n layout = boxes[i];\n box = layout.box;\n\n box.update(\n layout.width || chartArea.w,\n layout.height || chartArea.h,\n getMargins(layout.horizontal, chartArea)\n );\n const {same, other} = updateDims(chartArea, params, layout, stacks);\n\n // Dimensions changed and there were non full width boxes before this\n // -> we have to refit those\n refit |= same && refitBoxes.length;\n\n // Chart area changed in the opposite direction\n changed = changed || other;\n\n if (!box.fullSize) { // fullSize boxes don't need to be re-fitted in any case\n refitBoxes.push(layout);\n }\n }\n\n return refit && fitBoxes(refitBoxes, chartArea, params, stacks) || changed;\n}\n\nfunction setBoxDims(box, left, top, width, height) {\n box.top = top;\n box.left = left;\n box.right = left + width;\n box.bottom = top + height;\n box.width = width;\n box.height = height;\n}\n\nfunction placeBoxes(boxes, chartArea, params, stacks) {\n const userPadding = params.padding;\n let {x, y} = chartArea;\n\n for (const layout of boxes) {\n const box = layout.box;\n const stack = stacks[layout.stack] || {count: 1, placed: 0, weight: 1};\n const weight = (layout.stackWeight / stack.weight) || 1;\n if (layout.horizontal) {\n const width = chartArea.w * weight;\n const height = stack.size || box.height;\n if (defined(stack.start)) {\n y = stack.start;\n }\n if (box.fullSize) {\n setBoxDims(box, userPadding.left, y, params.outerWidth - userPadding.right - userPadding.left, height);\n } else {\n setBoxDims(box, chartArea.left + stack.placed, y, width, height);\n }\n stack.start = y;\n stack.placed += width;\n y = box.bottom;\n } else {\n const height = chartArea.h * weight;\n const width = stack.size || box.width;\n if (defined(stack.start)) {\n x = stack.start;\n }\n if (box.fullSize) {\n setBoxDims(box, x, userPadding.top, width, params.outerHeight - userPadding.bottom - userPadding.top);\n } else {\n setBoxDims(box, x, chartArea.top + stack.placed, width, height);\n }\n stack.start = x;\n stack.placed += height;\n x = box.right;\n }\n }\n\n chartArea.x = x;\n chartArea.y = y;\n}\n\n/**\n * @interface LayoutItem\n * @typedef {object} LayoutItem\n * @prop {string} position - The position of the item in the chart layout. Possible values are\n * 'left', 'top', 'right', 'bottom', and 'chartArea'\n * @prop {number} weight - The weight used to sort the item. Higher weights are further away from the chart area\n * @prop {boolean} fullSize - if true, and the item is horizontal, then push vertical boxes down\n * @prop {function} isHorizontal - returns true if the layout item is horizontal (ie. top or bottom)\n * @prop {function} update - Takes two parameters: width and height. Returns size of item\n * @prop {function} draw - Draws the element\n * @prop {function} [getPadding] - Returns an object with padding on the edges\n * @prop {number} width - Width of item. Must be valid after update()\n * @prop {number} height - Height of item. Must be valid after update()\n * @prop {number} left - Left edge of the item. Set by layout system and cannot be used in update\n * @prop {number} top - Top edge of the item. Set by layout system and cannot be used in update\n * @prop {number} right - Right edge of the item. Set by layout system and cannot be used in update\n * @prop {number} bottom - Bottom edge of the item. Set by layout system and cannot be used in update\n */\n\n// The layout service is very self explanatory. It's responsible for the layout within a chart.\n// Scales, Legends and Plugins all rely on the layout service and can easily register to be placed anywhere they need\n// It is this service's responsibility of carrying out that layout.\nexport default {\n\n /**\n\t * Register a box to a chart.\n\t * A box is simply a reference to an object that requires layout. eg. Scales, Legend, Title.\n\t * @param {Chart} chart - the chart to use\n\t * @param {LayoutItem} item - the item to add to be laid out\n\t */\n addBox(chart, item) {\n if (!chart.boxes) {\n chart.boxes = [];\n }\n\n // initialize item with default values\n item.fullSize = item.fullSize || false;\n item.position = item.position || 'top';\n item.weight = item.weight || 0;\n // @ts-ignore\n item._layers = item._layers || function() {\n return [{\n z: 0,\n draw(chartArea) {\n item.draw(chartArea);\n }\n }];\n };\n\n chart.boxes.push(item);\n },\n\n /**\n\t * Remove a layoutItem from a chart\n\t * @param {Chart} chart - the chart to remove the box from\n\t * @param {LayoutItem} layoutItem - the item to remove from the layout\n\t */\n removeBox(chart, layoutItem) {\n const index = chart.boxes ? chart.boxes.indexOf(layoutItem) : -1;\n if (index !== -1) {\n chart.boxes.splice(index, 1);\n }\n },\n\n /**\n\t * Sets (or updates) options on the given `item`.\n\t * @param {Chart} chart - the chart in which the item lives (or will be added to)\n\t * @param {LayoutItem} item - the item to configure with the given options\n\t * @param {object} options - the new item options.\n\t */\n configure(chart, item, options) {\n item.fullSize = options.fullSize;\n item.position = options.position;\n item.weight = options.weight;\n },\n\n /**\n\t * Fits boxes of the given chart into the given size by having each box measure itself\n\t * then running a fitting algorithm\n\t * @param {Chart} chart - the chart\n\t * @param {number} width - the width to fit into\n\t * @param {number} height - the height to fit into\n * @param {number} minPadding - minimum padding required for each side of chart area\n\t */\n update(chart, width, height, minPadding) {\n if (!chart) {\n return;\n }\n\n const padding = toPadding(chart.options.layout.padding);\n const availableWidth = Math.max(width - padding.width, 0);\n const availableHeight = Math.max(height - padding.height, 0);\n const boxes = buildLayoutBoxes(chart.boxes);\n const verticalBoxes = boxes.vertical;\n const horizontalBoxes = boxes.horizontal;\n\n // Before any changes are made, notify boxes that an update is about to being\n // This is used to clear any cached data (e.g. scale limits)\n each(chart.boxes, box => {\n if (typeof box.beforeLayout === 'function') {\n box.beforeLayout();\n }\n });\n\n // Essentially we now have any number of boxes on each of the 4 sides.\n // Our canvas looks like the following.\n // The areas L1 and L2 are the left axes. R1 is the right axis, T1 is the top axis and\n // B1 is the bottom axis\n // There are also 4 quadrant-like locations (left to right instead of clockwise) reserved for chart overlays\n // These locations are single-box locations only, when trying to register a chartArea location that is already taken,\n // an error will be thrown.\n //\n // |----------------------------------------------------|\n // | T1 (Full Width) |\n // |----------------------------------------------------|\n // | | | T2 | |\n // | |----|-------------------------------------|----|\n // | | | C1 | | C2 | |\n // | | |----| |----| |\n // | | | | |\n // | L1 | L2 | ChartArea (C0) | R1 |\n // | | | | |\n // | | |----| |----| |\n // | | | C3 | | C4 | |\n // | |----|-------------------------------------|----|\n // | | | B1 | |\n // |----------------------------------------------------|\n // | B2 (Full Width) |\n // |----------------------------------------------------|\n //\n\n const visibleVerticalBoxCount = verticalBoxes.reduce((total, wrap) =>\n wrap.box.options && wrap.box.options.display === false ? total : total + 1, 0) || 1;\n\n const params = Object.freeze({\n outerWidth: width,\n outerHeight: height,\n padding,\n availableWidth,\n availableHeight,\n vBoxMaxWidth: availableWidth / 2 / visibleVerticalBoxCount,\n hBoxMaxHeight: availableHeight / 2\n });\n const maxPadding = Object.assign({}, padding);\n updateMaxPadding(maxPadding, toPadding(minPadding));\n const chartArea = Object.assign({\n maxPadding,\n w: availableWidth,\n h: availableHeight,\n x: padding.left,\n y: padding.top\n }, padding);\n\n const stacks = setLayoutDims(verticalBoxes.concat(horizontalBoxes), params);\n\n // First fit the fullSize boxes, to reduce probability of re-fitting.\n fitBoxes(boxes.fullSize, chartArea, params, stacks);\n\n // Then fit vertical boxes\n fitBoxes(verticalBoxes, chartArea, params, stacks);\n\n // Then fit horizontal boxes\n if (fitBoxes(horizontalBoxes, chartArea, params, stacks)) {\n // if the area changed, re-fit vertical boxes\n fitBoxes(verticalBoxes, chartArea, params, stacks);\n }\n\n handleMaxPadding(chartArea);\n\n // Finally place the boxes to correct coordinates\n placeBoxes(boxes.leftAndTop, chartArea, params, stacks);\n\n // Move to opposite side of chart\n chartArea.x += chartArea.w;\n chartArea.y += chartArea.h;\n\n placeBoxes(boxes.rightAndBottom, chartArea, params, stacks);\n\n chart.chartArea = {\n left: chartArea.left,\n top: chartArea.top,\n right: chartArea.left + chartArea.w,\n bottom: chartArea.top + chartArea.h,\n height: chartArea.h,\n width: chartArea.w,\n };\n\n // Finally update boxes in chartArea (radial scale for example)\n each(boxes.chartArea, (layout) => {\n const box = layout.box;\n Object.assign(box, chart.chartArea);\n box.update(chartArea.w, chartArea.h, {left: 0, top: 0, right: 0, bottom: 0});\n });\n }\n};\n","\n/**\n * @typedef { import('../core/core.controller.js').default } Chart\n */\n\n/**\n * Abstract class that allows abstracting platform dependencies away from the chart.\n */\nexport default class BasePlatform {\n /**\n\t * Called at chart construction time, returns a context2d instance implementing\n\t * the [W3C Canvas 2D Context API standard]{@link https://www.w3.org/TR/2dcontext/}.\n\t * @param {HTMLCanvasElement} canvas - The canvas from which to acquire context (platform specific)\n\t * @param {number} [aspectRatio] - The chart options\n\t */\n acquireContext(canvas, aspectRatio) {} // eslint-disable-line no-unused-vars\n\n /**\n\t * Called at chart destruction time, releases any resources associated to the context\n\t * previously returned by the acquireContext() method.\n\t * @param {CanvasRenderingContext2D} context - The context2d instance\n\t * @returns {boolean} true if the method succeeded, else false\n\t */\n releaseContext(context) { // eslint-disable-line no-unused-vars\n return false;\n }\n\n /**\n\t * Registers the specified listener on the given chart.\n\t * @param {Chart} chart - Chart from which to listen for event\n\t * @param {string} type - The ({@link ChartEvent}) type to listen for\n\t * @param {function} listener - Receives a notification (an object that implements\n\t * the {@link ChartEvent} interface) when an event of the specified type occurs.\n\t */\n addEventListener(chart, type, listener) {} // eslint-disable-line no-unused-vars\n\n /**\n\t * Removes the specified listener previously registered with addEventListener.\n\t * @param {Chart} chart - Chart from which to remove the listener\n\t * @param {string} type - The ({@link ChartEvent}) type to remove\n\t * @param {function} listener - The listener function to remove from the event target.\n\t */\n removeEventListener(chart, type, listener) {} // eslint-disable-line no-unused-vars\n\n /**\n\t * @returns {number} the current devicePixelRatio of the device this platform is connected to.\n\t */\n getDevicePixelRatio() {\n return 1;\n }\n\n /**\n\t * Returns the maximum size in pixels of given canvas element.\n\t * @param {HTMLCanvasElement} element\n\t * @param {number} [width] - content width of parent element\n\t * @param {number} [height] - content height of parent element\n\t * @param {number} [aspectRatio] - aspect ratio to maintain\n\t */\n getMaximumSize(element, width, height, aspectRatio) {\n width = Math.max(0, width || element.width);\n height = height || element.height;\n return {\n width,\n height: Math.max(0, aspectRatio ? Math.floor(width / aspectRatio) : height)\n };\n }\n\n /**\n\t * @param {HTMLCanvasElement} canvas\n\t * @returns {boolean} true if the canvas is attached to the platform, false if not.\n\t */\n isAttached(canvas) { // eslint-disable-line no-unused-vars\n return true;\n }\n\n /**\n * Updates config with platform specific requirements\n * @param {import('../core/core.config.js').default} config\n */\n updateConfig(config) { // eslint-disable-line no-unused-vars\n // no-op\n }\n}\n","/**\n * Platform fallback implementation (minimal).\n * @see https://github.com/chartjs/Chart.js/pull/4591#issuecomment-319575939\n */\n\nimport BasePlatform from './platform.base.js';\n\n/**\n * Platform class for charts without access to the DOM or to many element properties\n * This platform is used by default for any chart passed an OffscreenCanvas.\n * @extends BasePlatform\n */\nexport default class BasicPlatform extends BasePlatform {\n acquireContext(item) {\n // To prevent canvas fingerprinting, some add-ons undefine the getContext\n // method, for example: https://github.com/kkapsner/CanvasBlocker\n // https://github.com/chartjs/Chart.js/issues/2807\n return item && item.getContext && item.getContext('2d') || null;\n }\n updateConfig(config) {\n config.options.animation = false;\n }\n}\n","/**\n * Chart.Platform implementation for targeting a web browser\n */\n\nimport BasePlatform from './platform.base.js';\nimport {_getParentNode, getRelativePosition, supportsEventListenerOptions, readUsedSize, getMaximumSize} from '../helpers/helpers.dom.js';\nimport {throttled} from '../helpers/helpers.extras.js';\nimport {isNullOrUndef} from '../helpers/helpers.core.js';\n\n/**\n * @typedef { import('../core/core.controller.js').default } Chart\n */\n\nconst EXPANDO_KEY = '$chartjs';\n\n/**\n * DOM event types -> Chart.js event types.\n * Note: only events with different types are mapped.\n * @see https://developer.mozilla.org/en-US/docs/Web/Events\n */\nconst EVENT_TYPES = {\n touchstart: 'mousedown',\n touchmove: 'mousemove',\n touchend: 'mouseup',\n pointerenter: 'mouseenter',\n pointerdown: 'mousedown',\n pointermove: 'mousemove',\n pointerup: 'mouseup',\n pointerleave: 'mouseout',\n pointerout: 'mouseout'\n};\n\nconst isNullOrEmpty = value => value === null || value === '';\n/**\n * Initializes the canvas style and render size without modifying the canvas display size,\n * since responsiveness is handled by the controller.resize() method. The config is used\n * to determine the aspect ratio to apply in case no explicit height has been specified.\n * @param {HTMLCanvasElement} canvas\n * @param {number} [aspectRatio]\n */\nfunction initCanvas(canvas, aspectRatio) {\n const style = canvas.style;\n\n // NOTE(SB) canvas.getAttribute('width') !== canvas.width: in the first case it\n // returns null or '' if no explicit value has been set to the canvas attribute.\n const renderHeight = canvas.getAttribute('height');\n const renderWidth = canvas.getAttribute('width');\n\n // Chart.js modifies some canvas values that we want to restore on destroy\n canvas[EXPANDO_KEY] = {\n initial: {\n height: renderHeight,\n width: renderWidth,\n style: {\n display: style.display,\n height: style.height,\n width: style.width\n }\n }\n };\n\n // Force canvas to display as block to avoid extra space caused by inline\n // elements, which would interfere with the responsive resize process.\n // https://github.com/chartjs/Chart.js/issues/2538\n style.display = style.display || 'block';\n // Include possible borders in the size\n style.boxSizing = style.boxSizing || 'border-box';\n\n if (isNullOrEmpty(renderWidth)) {\n const displayWidth = readUsedSize(canvas, 'width');\n if (displayWidth !== undefined) {\n canvas.width = displayWidth;\n }\n }\n\n if (isNullOrEmpty(renderHeight)) {\n if (canvas.style.height === '') {\n // If no explicit render height and style height, let's apply the aspect ratio,\n // which one can be specified by the user but also by charts as default option\n // (i.e. options.aspectRatio). If not specified, use canvas aspect ratio of 2.\n canvas.height = canvas.width / (aspectRatio || 2);\n } else {\n const displayHeight = readUsedSize(canvas, 'height');\n if (displayHeight !== undefined) {\n canvas.height = displayHeight;\n }\n }\n }\n\n return canvas;\n}\n\n// Default passive to true as expected by Chrome for 'touchstart' and 'touchend' events.\n// https://github.com/chartjs/Chart.js/issues/4287\nconst eventListenerOptions = supportsEventListenerOptions ? {passive: true} : false;\n\nfunction addListener(node, type, listener) {\n node.addEventListener(type, listener, eventListenerOptions);\n}\n\nfunction removeListener(chart, type, listener) {\n chart.canvas.removeEventListener(type, listener, eventListenerOptions);\n}\n\nfunction fromNativeEvent(event, chart) {\n const type = EVENT_TYPES[event.type] || event.type;\n const {x, y} = getRelativePosition(event, chart);\n return {\n type,\n chart,\n native: event,\n x: x !== undefined ? x : null,\n y: y !== undefined ? y : null,\n };\n}\n\nfunction nodeListContains(nodeList, canvas) {\n for (const node of nodeList) {\n if (node === canvas || node.contains(canvas)) {\n return true;\n }\n }\n}\n\nfunction createAttachObserver(chart, type, listener) {\n const canvas = chart.canvas;\n const observer = new MutationObserver(entries => {\n let trigger = false;\n for (const entry of entries) {\n trigger = trigger || nodeListContains(entry.addedNodes, canvas);\n trigger = trigger && !nodeListContains(entry.removedNodes, canvas);\n }\n if (trigger) {\n listener();\n }\n });\n observer.observe(document, {childList: true, subtree: true});\n return observer;\n}\n\nfunction createDetachObserver(chart, type, listener) {\n const canvas = chart.canvas;\n const observer = new MutationObserver(entries => {\n let trigger = false;\n for (const entry of entries) {\n trigger = trigger || nodeListContains(entry.removedNodes, canvas);\n trigger = trigger && !nodeListContains(entry.addedNodes, canvas);\n }\n if (trigger) {\n listener();\n }\n });\n observer.observe(document, {childList: true, subtree: true});\n return observer;\n}\n\nconst drpListeningCharts = new Map();\nlet oldDevicePixelRatio = 0;\n\nfunction onWindowResize() {\n const dpr = window.devicePixelRatio;\n if (dpr === oldDevicePixelRatio) {\n return;\n }\n oldDevicePixelRatio = dpr;\n drpListeningCharts.forEach((resize, chart) => {\n if (chart.currentDevicePixelRatio !== dpr) {\n resize();\n }\n });\n}\n\nfunction listenDevicePixelRatioChanges(chart, resize) {\n if (!drpListeningCharts.size) {\n window.addEventListener('resize', onWindowResize);\n }\n drpListeningCharts.set(chart, resize);\n}\n\nfunction unlistenDevicePixelRatioChanges(chart) {\n drpListeningCharts.delete(chart);\n if (!drpListeningCharts.size) {\n window.removeEventListener('resize', onWindowResize);\n }\n}\n\nfunction createResizeObserver(chart, type, listener) {\n const canvas = chart.canvas;\n const container = canvas && _getParentNode(canvas);\n if (!container) {\n return;\n }\n const resize = throttled((width, height) => {\n const w = container.clientWidth;\n listener(width, height);\n if (w < container.clientWidth) {\n // If the container size shrank during chart resize, let's assume\n // scrollbar appeared. So we resize again with the scrollbar visible -\n // effectively making chart smaller and the scrollbar hidden again.\n // Because we are inside `throttled`, and currently `ticking`, scroll\n // events are ignored during this whole 2 resize process.\n // If we assumed wrong and something else happened, we are resizing\n // twice in a frame (potential performance issue)\n listener();\n }\n }, window);\n\n // @ts-ignore until https://github.com/microsoft/TypeScript/issues/37861 implemented\n const observer = new ResizeObserver(entries => {\n const entry = entries[0];\n const width = entry.contentRect.width;\n const height = entry.contentRect.height;\n // When its container's display is set to 'none' the callback will be called with a\n // size of (0, 0), which will cause the chart to lose its original height, so skip\n // resizing in such case.\n if (width === 0 && height === 0) {\n return;\n }\n resize(width, height);\n });\n observer.observe(container);\n listenDevicePixelRatioChanges(chart, resize);\n\n return observer;\n}\n\nfunction releaseObserver(chart, type, observer) {\n if (observer) {\n observer.disconnect();\n }\n if (type === 'resize') {\n unlistenDevicePixelRatioChanges(chart);\n }\n}\n\nfunction createProxyAndListen(chart, type, listener) {\n const canvas = chart.canvas;\n const proxy = throttled((event) => {\n // This case can occur if the chart is destroyed while waiting\n // for the throttled function to occur. We prevent crashes by checking\n // for a destroyed chart\n if (chart.ctx !== null) {\n listener(fromNativeEvent(event, chart));\n }\n }, chart);\n\n addListener(canvas, type, proxy);\n\n return proxy;\n}\n\n/**\n * Platform class for charts that can access the DOM and global window/document properties\n * @extends BasePlatform\n */\nexport default class DomPlatform extends BasePlatform {\n\n /**\n\t * @param {HTMLCanvasElement} canvas\n\t * @param {number} [aspectRatio]\n\t * @return {CanvasRenderingContext2D|null}\n\t */\n acquireContext(canvas, aspectRatio) {\n // To prevent canvas fingerprinting, some add-ons undefine the getContext\n // method, for example: https://github.com/kkapsner/CanvasBlocker\n // https://github.com/chartjs/Chart.js/issues/2807\n const context = canvas && canvas.getContext && canvas.getContext('2d');\n\n // `instanceof HTMLCanvasElement/CanvasRenderingContext2D` fails when the canvas is\n // inside an iframe or when running in a protected environment. We could guess the\n // types from their toString() value but let's keep things flexible and assume it's\n // a sufficient condition if the canvas has a context2D which has canvas as `canvas`.\n // https://github.com/chartjs/Chart.js/issues/3887\n // https://github.com/chartjs/Chart.js/issues/4102\n // https://github.com/chartjs/Chart.js/issues/4152\n if (context && context.canvas === canvas) {\n // Load platform resources on first chart creation, to make it possible to\n // import the library before setting platform options.\n initCanvas(canvas, aspectRatio);\n return context;\n }\n\n return null;\n }\n\n /**\n\t * @param {CanvasRenderingContext2D} context\n\t */\n releaseContext(context) {\n const canvas = context.canvas;\n if (!canvas[EXPANDO_KEY]) {\n return false;\n }\n\n const initial = canvas[EXPANDO_KEY].initial;\n ['height', 'width'].forEach((prop) => {\n const value = initial[prop];\n if (isNullOrUndef(value)) {\n canvas.removeAttribute(prop);\n } else {\n canvas.setAttribute(prop, value);\n }\n });\n\n const style = initial.style || {};\n Object.keys(style).forEach((key) => {\n canvas.style[key] = style[key];\n });\n\n // The canvas render size might have been changed (and thus the state stack discarded),\n // we can't use save() and restore() to restore the initial state. So make sure that at\n // least the canvas context is reset to the default state by setting the canvas width.\n // https://www.w3.org/TR/2011/WD-html5-20110525/the-canvas-element.html\n // eslint-disable-next-line no-self-assign\n canvas.width = canvas.width;\n\n delete canvas[EXPANDO_KEY];\n return true;\n }\n\n /**\n\t *\n\t * @param {Chart} chart\n\t * @param {string} type\n\t * @param {function} listener\n\t */\n addEventListener(chart, type, listener) {\n // Can have only one listener per type, so make sure previous is removed\n this.removeEventListener(chart, type);\n\n const proxies = chart.$proxies || (chart.$proxies = {});\n const handlers = {\n attach: createAttachObserver,\n detach: createDetachObserver,\n resize: createResizeObserver\n };\n const handler = handlers[type] || createProxyAndListen;\n proxies[type] = handler(chart, type, listener);\n }\n\n\n /**\n\t * @param {Chart} chart\n\t * @param {string} type\n\t */\n removeEventListener(chart, type) {\n const proxies = chart.$proxies || (chart.$proxies = {});\n const proxy = proxies[type];\n\n if (!proxy) {\n return;\n }\n\n const handlers = {\n attach: releaseObserver,\n detach: releaseObserver,\n resize: releaseObserver\n };\n const handler = handlers[type] || removeListener;\n handler(chart, type, proxy);\n proxies[type] = undefined;\n }\n\n getDevicePixelRatio() {\n return window.devicePixelRatio;\n }\n\n /**\n\t * @param {HTMLCanvasElement} canvas\n\t * @param {number} [width] - content width of parent element\n\t * @param {number} [height] - content height of parent element\n\t * @param {number} [aspectRatio] - aspect ratio to maintain\n\t */\n getMaximumSize(canvas, width, height, aspectRatio) {\n return getMaximumSize(canvas, width, height, aspectRatio);\n }\n\n /**\n\t * @param {HTMLCanvasElement} canvas\n\t */\n isAttached(canvas) {\n const container = _getParentNode(canvas);\n return !!(container && container.isConnected);\n }\n}\n","import type {AnyObject} from '../types/basic.js';\nimport type {Point} from '../types/geometric.js';\nimport type {Animation} from '../types/animation.js';\nimport {isNumber} from '../helpers/helpers.math.js';\n\nexport default class Element {\n\n static defaults = {};\n static defaultRoutes = undefined;\n\n x: number;\n y: number;\n active = false;\n options: O;\n $animations: Record;\n\n tooltipPosition(useFinalPosition: boolean): Point {\n const {x, y} = this.getProps(['x', 'y'], useFinalPosition);\n return {x, y} as Point;\n }\n\n hasValue() {\n return isNumber(this.x) && isNumber(this.y);\n }\n\n /**\n * Gets the current or final value of each prop. Can return extra properties (whole object).\n * @param props - properties to get\n * @param [final] - get the final value (animation target)\n */\n getProps
(props: P, final?: boolean): Pick;\n getProps
(props: P[], final?: boolean): Partial>;\n getProps(props: string[], final?: boolean): Partial> {\n const anims = this.$animations;\n if (!final || !anims) {\n // let's not create an object, if not needed\n return this as Record;\n }\n const ret: Record = {};\n props.forEach((prop) => {\n ret[prop] = anims[prop] && anims[prop].active() ? anims[prop]._to : this[prop as string];\n });\n return ret;\n }\n}\n","import {isNullOrUndef, valueOrDefault} from '../helpers/helpers.core.js';\nimport {_factorize} from '../helpers/helpers.math.js';\n\n\n/**\n * @typedef { import('./core.controller.js').default } Chart\n * @typedef {{value:number | string, label?:string, major?:boolean, $context?:any}} Tick\n */\n\n/**\n * Returns a subset of ticks to be plotted to avoid overlapping labels.\n * @param {import('./core.scale.js').default} scale\n * @param {Tick[]} ticks\n * @return {Tick[]}\n * @private\n */\nexport function autoSkip(scale, ticks) {\n const tickOpts = scale.options.ticks;\n const determinedMaxTicks = determineMaxTicks(scale);\n const ticksLimit = Math.min(tickOpts.maxTicksLimit || determinedMaxTicks, determinedMaxTicks);\n const majorIndices = tickOpts.major.enabled ? getMajorIndices(ticks) : [];\n const numMajorIndices = majorIndices.length;\n const first = majorIndices[0];\n const last = majorIndices[numMajorIndices - 1];\n const newTicks = [];\n\n // If there are too many major ticks to display them all\n if (numMajorIndices > ticksLimit) {\n skipMajors(ticks, newTicks, majorIndices, numMajorIndices / ticksLimit);\n return newTicks;\n }\n\n const spacing = calculateSpacing(majorIndices, ticks, ticksLimit);\n\n if (numMajorIndices > 0) {\n let i, ilen;\n const avgMajorSpacing = numMajorIndices > 1 ? Math.round((last - first) / (numMajorIndices - 1)) : null;\n skip(ticks, newTicks, spacing, isNullOrUndef(avgMajorSpacing) ? 0 : first - avgMajorSpacing, first);\n for (i = 0, ilen = numMajorIndices - 1; i < ilen; i++) {\n skip(ticks, newTicks, spacing, majorIndices[i], majorIndices[i + 1]);\n }\n skip(ticks, newTicks, spacing, last, isNullOrUndef(avgMajorSpacing) ? ticks.length : last + avgMajorSpacing);\n return newTicks;\n }\n skip(ticks, newTicks, spacing);\n return newTicks;\n}\n\nfunction determineMaxTicks(scale) {\n const offset = scale.options.offset;\n const tickLength = scale._tickSize();\n const maxScale = scale._length / tickLength + (offset ? 0 : 1);\n const maxChart = scale._maxLength / tickLength;\n return Math.floor(Math.min(maxScale, maxChart));\n}\n\n/**\n * @param {number[]} majorIndices\n * @param {Tick[]} ticks\n * @param {number} ticksLimit\n */\nfunction calculateSpacing(majorIndices, ticks, ticksLimit) {\n const evenMajorSpacing = getEvenSpacing(majorIndices);\n const spacing = ticks.length / ticksLimit;\n\n // If the major ticks are evenly spaced apart, place the minor ticks\n // so that they divide the major ticks into even chunks\n if (!evenMajorSpacing) {\n return Math.max(spacing, 1);\n }\n\n const factors = _factorize(evenMajorSpacing);\n for (let i = 0, ilen = factors.length - 1; i < ilen; i++) {\n const factor = factors[i];\n if (factor > spacing) {\n return factor;\n }\n }\n return Math.max(spacing, 1);\n}\n\n/**\n * @param {Tick[]} ticks\n */\nfunction getMajorIndices(ticks) {\n const result = [];\n let i, ilen;\n for (i = 0, ilen = ticks.length; i < ilen; i++) {\n if (ticks[i].major) {\n result.push(i);\n }\n }\n return result;\n}\n\n/**\n * @param {Tick[]} ticks\n * @param {Tick[]} newTicks\n * @param {number[]} majorIndices\n * @param {number} spacing\n */\nfunction skipMajors(ticks, newTicks, majorIndices, spacing) {\n let count = 0;\n let next = majorIndices[0];\n let i;\n\n spacing = Math.ceil(spacing);\n for (i = 0; i < ticks.length; i++) {\n if (i === next) {\n newTicks.push(ticks[i]);\n count++;\n next = majorIndices[count * spacing];\n }\n }\n}\n\n/**\n * @param {Tick[]} ticks\n * @param {Tick[]} newTicks\n * @param {number} spacing\n * @param {number} [majorStart]\n * @param {number} [majorEnd]\n */\nfunction skip(ticks, newTicks, spacing, majorStart, majorEnd) {\n const start = valueOrDefault(majorStart, 0);\n const end = Math.min(valueOrDefault(majorEnd, ticks.length), ticks.length);\n let count = 0;\n let length, i, next;\n\n spacing = Math.ceil(spacing);\n if (majorEnd) {\n length = majorEnd - majorStart;\n spacing = length / Math.floor(length / spacing);\n }\n\n next = start;\n\n while (next < 0) {\n count++;\n next = Math.round(start + count * spacing);\n }\n\n for (i = Math.max(start, 0); i < end; i++) {\n if (i === next) {\n newTicks.push(ticks[i]);\n count++;\n next = Math.round(start + count * spacing);\n }\n }\n}\n\n\n/**\n * @param {number[]} arr\n */\nfunction getEvenSpacing(arr) {\n const len = arr.length;\n let i, diff;\n\n if (len < 2) {\n return false;\n }\n\n for (diff = arr[0], i = 1; i < len; ++i) {\n if (arr[i] - arr[i - 1] !== diff) {\n return false;\n }\n }\n return diff;\n}\n","import Element from './core.element.js';\nimport {_alignPixel, _measureText, renderText, clipArea, unclipArea} from '../helpers/helpers.canvas.js';\nimport {callback as call, each, finiteOrDefault, isArray, isFinite, isNullOrUndef, isObject, valueOrDefault} from '../helpers/helpers.core.js';\nimport {toDegrees, toRadians, _int16Range, _limitValue, HALF_PI} from '../helpers/helpers.math.js';\nimport {_alignStartEnd, _toLeftRightCenter} from '../helpers/helpers.extras.js';\nimport {createContext, toFont, toPadding, _addGrace} from '../helpers/helpers.options.js';\nimport {autoSkip} from './core.scale.autoskip.js';\n\nconst reverseAlign = (align) => align === 'left' ? 'right' : align === 'right' ? 'left' : align;\nconst offsetFromEdge = (scale, edge, offset) => edge === 'top' || edge === 'left' ? scale[edge] + offset : scale[edge] - offset;\nconst getTicksLimit = (ticksLength, maxTicksLimit) => Math.min(maxTicksLimit || ticksLength, ticksLength);\n\n/**\n * @typedef { import('../types/index.js').Chart } Chart\n * @typedef {{value:number | string, label?:string, major?:boolean, $context?:any}} Tick\n */\n\n/**\n * Returns a new array containing numItems from arr\n * @param {any[]} arr\n * @param {number} numItems\n */\nfunction sample(arr, numItems) {\n const result = [];\n const increment = arr.length / numItems;\n const len = arr.length;\n let i = 0;\n\n for (; i < len; i += increment) {\n result.push(arr[Math.floor(i)]);\n }\n return result;\n}\n\n/**\n * @param {Scale} scale\n * @param {number} index\n * @param {boolean} offsetGridLines\n */\nfunction getPixelForGridLine(scale, index, offsetGridLines) {\n const length = scale.ticks.length;\n const validIndex = Math.min(index, length - 1);\n const start = scale._startPixel;\n const end = scale._endPixel;\n const epsilon = 1e-6; // 1e-6 is margin in pixels for accumulated error.\n let lineValue = scale.getPixelForTick(validIndex);\n let offset;\n\n if (offsetGridLines) {\n if (length === 1) {\n offset = Math.max(lineValue - start, end - lineValue);\n } else if (index === 0) {\n offset = (scale.getPixelForTick(1) - lineValue) / 2;\n } else {\n offset = (lineValue - scale.getPixelForTick(validIndex - 1)) / 2;\n }\n lineValue += validIndex < index ? offset : -offset;\n\n // Return undefined if the pixel is out of the range\n if (lineValue < start - epsilon || lineValue > end + epsilon) {\n return;\n }\n }\n return lineValue;\n}\n\n/**\n * @param {object} caches\n * @param {number} length\n */\nfunction garbageCollect(caches, length) {\n each(caches, (cache) => {\n const gc = cache.gc;\n const gcLen = gc.length / 2;\n let i;\n if (gcLen > length) {\n for (i = 0; i < gcLen; ++i) {\n delete cache.data[gc[i]];\n }\n gc.splice(0, gcLen);\n }\n });\n}\n\n/**\n * @param {object} options\n */\nfunction getTickMarkLength(options) {\n return options.drawTicks ? options.tickLength : 0;\n}\n\n/**\n * @param {object} options\n */\nfunction getTitleHeight(options, fallback) {\n if (!options.display) {\n return 0;\n }\n\n const font = toFont(options.font, fallback);\n const padding = toPadding(options.padding);\n const lines = isArray(options.text) ? options.text.length : 1;\n\n return (lines * font.lineHeight) + padding.height;\n}\n\nfunction createScaleContext(parent, scale) {\n return createContext(parent, {\n scale,\n type: 'scale'\n });\n}\n\nfunction createTickContext(parent, index, tick) {\n return createContext(parent, {\n tick,\n index,\n type: 'tick'\n });\n}\n\nfunction titleAlign(align, position, reverse) {\n /** @type {CanvasTextAlign} */\n let ret = _toLeftRightCenter(align);\n if ((reverse && position !== 'right') || (!reverse && position === 'right')) {\n ret = reverseAlign(ret);\n }\n return ret;\n}\n\nfunction titleArgs(scale, offset, position, align) {\n const {top, left, bottom, right, chart} = scale;\n const {chartArea, scales} = chart;\n let rotation = 0;\n let maxWidth, titleX, titleY;\n const height = bottom - top;\n const width = right - left;\n\n if (scale.isHorizontal()) {\n titleX = _alignStartEnd(align, left, right);\n\n if (isObject(position)) {\n const positionAxisID = Object.keys(position)[0];\n const value = position[positionAxisID];\n titleY = scales[positionAxisID].getPixelForValue(value) + height - offset;\n } else if (position === 'center') {\n titleY = (chartArea.bottom + chartArea.top) / 2 + height - offset;\n } else {\n titleY = offsetFromEdge(scale, position, offset);\n }\n maxWidth = right - left;\n } else {\n if (isObject(position)) {\n const positionAxisID = Object.keys(position)[0];\n const value = position[positionAxisID];\n titleX = scales[positionAxisID].getPixelForValue(value) - width + offset;\n } else if (position === 'center') {\n titleX = (chartArea.left + chartArea.right) / 2 - width + offset;\n } else {\n titleX = offsetFromEdge(scale, position, offset);\n }\n titleY = _alignStartEnd(align, bottom, top);\n rotation = position === 'left' ? -HALF_PI : HALF_PI;\n }\n return {titleX, titleY, maxWidth, rotation};\n}\n\nexport default class Scale extends Element {\n\n // eslint-disable-next-line max-statements\n constructor(cfg) {\n super();\n\n /** @type {string} */\n this.id = cfg.id;\n /** @type {string} */\n this.type = cfg.type;\n /** @type {any} */\n this.options = undefined;\n /** @type {CanvasRenderingContext2D} */\n this.ctx = cfg.ctx;\n /** @type {Chart} */\n this.chart = cfg.chart;\n\n // implements box\n /** @type {number} */\n this.top = undefined;\n /** @type {number} */\n this.bottom = undefined;\n /** @type {number} */\n this.left = undefined;\n /** @type {number} */\n this.right = undefined;\n /** @type {number} */\n this.width = undefined;\n /** @type {number} */\n this.height = undefined;\n this._margins = {\n left: 0,\n right: 0,\n top: 0,\n bottom: 0\n };\n /** @type {number} */\n this.maxWidth = undefined;\n /** @type {number} */\n this.maxHeight = undefined;\n /** @type {number} */\n this.paddingTop = undefined;\n /** @type {number} */\n this.paddingBottom = undefined;\n /** @type {number} */\n this.paddingLeft = undefined;\n /** @type {number} */\n this.paddingRight = undefined;\n\n // scale-specific properties\n /** @type {string=} */\n this.axis = undefined;\n /** @type {number=} */\n this.labelRotation = undefined;\n this.min = undefined;\n this.max = undefined;\n this._range = undefined;\n /** @type {Tick[]} */\n this.ticks = [];\n /** @type {object[]|null} */\n this._gridLineItems = null;\n /** @type {object[]|null} */\n this._labelItems = null;\n /** @type {object|null} */\n this._labelSizes = null;\n this._length = 0;\n this._maxLength = 0;\n this._longestTextCache = {};\n /** @type {number} */\n this._startPixel = undefined;\n /** @type {number} */\n this._endPixel = undefined;\n this._reversePixels = false;\n this._userMax = undefined;\n this._userMin = undefined;\n this._suggestedMax = undefined;\n this._suggestedMin = undefined;\n this._ticksLength = 0;\n this._borderValue = 0;\n this._cache = {};\n this._dataLimitsCached = false;\n this.$context = undefined;\n }\n\n /**\n\t * @param {any} options\n\t * @since 3.0\n\t */\n init(options) {\n this.options = options.setContext(this.getContext());\n\n this.axis = options.axis;\n\n // parse min/max value, so we can properly determine min/max for other scales\n this._userMin = this.parse(options.min);\n this._userMax = this.parse(options.max);\n this._suggestedMin = this.parse(options.suggestedMin);\n this._suggestedMax = this.parse(options.suggestedMax);\n }\n\n /**\n\t * Parse a supported input value to internal representation.\n\t * @param {*} raw\n\t * @param {number} [index]\n\t * @since 3.0\n\t */\n parse(raw, index) { // eslint-disable-line no-unused-vars\n return raw;\n }\n\n /**\n\t * @return {{min: number, max: number, minDefined: boolean, maxDefined: boolean}}\n\t * @protected\n\t * @since 3.0\n\t */\n getUserBounds() {\n let {_userMin, _userMax, _suggestedMin, _suggestedMax} = this;\n _userMin = finiteOrDefault(_userMin, Number.POSITIVE_INFINITY);\n _userMax = finiteOrDefault(_userMax, Number.NEGATIVE_INFINITY);\n _suggestedMin = finiteOrDefault(_suggestedMin, Number.POSITIVE_INFINITY);\n _suggestedMax = finiteOrDefault(_suggestedMax, Number.NEGATIVE_INFINITY);\n return {\n min: finiteOrDefault(_userMin, _suggestedMin),\n max: finiteOrDefault(_userMax, _suggestedMax),\n minDefined: isFinite(_userMin),\n maxDefined: isFinite(_userMax)\n };\n }\n\n /**\n\t * @param {boolean} canStack\n\t * @return {{min: number, max: number}}\n\t * @protected\n\t * @since 3.0\n\t */\n getMinMax(canStack) {\n // eslint-disable-next-line prefer-const\n let {min, max, minDefined, maxDefined} = this.getUserBounds();\n let range;\n\n if (minDefined && maxDefined) {\n return {min, max};\n }\n\n const metas = this.getMatchingVisibleMetas();\n for (let i = 0, ilen = metas.length; i < ilen; ++i) {\n range = metas[i].controller.getMinMax(this, canStack);\n if (!minDefined) {\n min = Math.min(min, range.min);\n }\n if (!maxDefined) {\n max = Math.max(max, range.max);\n }\n }\n\n // Make sure min <= max when only min or max is defined by user and the data is outside that range\n min = maxDefined && min > max ? max : min;\n max = minDefined && min > max ? min : max;\n\n return {\n min: finiteOrDefault(min, finiteOrDefault(max, min)),\n max: finiteOrDefault(max, finiteOrDefault(min, max))\n };\n }\n\n /**\n\t * Get the padding needed for the scale\n\t * @return {{top: number, left: number, bottom: number, right: number}} the necessary padding\n\t * @private\n\t */\n getPadding() {\n return {\n left: this.paddingLeft || 0,\n top: this.paddingTop || 0,\n right: this.paddingRight || 0,\n bottom: this.paddingBottom || 0\n };\n }\n\n /**\n\t * Returns the scale tick objects\n\t * @return {Tick[]}\n\t * @since 2.7\n\t */\n getTicks() {\n return this.ticks;\n }\n\n /**\n\t * @return {string[]}\n\t */\n getLabels() {\n const data = this.chart.data;\n return this.options.labels || (this.isHorizontal() ? data.xLabels : data.yLabels) || data.labels || [];\n }\n\n /**\n * @return {import('../types.js').LabelItem[]}\n */\n getLabelItems(chartArea = this.chart.chartArea) {\n const items = this._labelItems || (this._labelItems = this._computeLabelItems(chartArea));\n return items;\n }\n\n // When a new layout is created, reset the data limits cache\n beforeLayout() {\n this._cache = {};\n this._dataLimitsCached = false;\n }\n\n // These methods are ordered by lifecycle. Utilities then follow.\n // Any function defined here is inherited by all scale types.\n // Any function can be extended by the scale type\n\n beforeUpdate() {\n call(this.options.beforeUpdate, [this]);\n }\n\n /**\n\t * @param {number} maxWidth - the max width in pixels\n\t * @param {number} maxHeight - the max height in pixels\n\t * @param {{top: number, left: number, bottom: number, right: number}} margins - the space between the edge of the other scales and edge of the chart\n\t * This space comes from two sources:\n\t * - padding - space that's required to show the labels at the edges of the scale\n\t * - thickness of scales or legends in another orientation\n\t */\n update(maxWidth, maxHeight, margins) {\n const {beginAtZero, grace, ticks: tickOpts} = this.options;\n const sampleSize = tickOpts.sampleSize;\n\n // Update Lifecycle - Probably don't want to ever extend or overwrite this function ;)\n this.beforeUpdate();\n\n // Absorb the master measurements\n this.maxWidth = maxWidth;\n this.maxHeight = maxHeight;\n this._margins = margins = Object.assign({\n left: 0,\n right: 0,\n top: 0,\n bottom: 0\n }, margins);\n\n this.ticks = null;\n this._labelSizes = null;\n this._gridLineItems = null;\n this._labelItems = null;\n\n // Dimensions\n this.beforeSetDimensions();\n this.setDimensions();\n this.afterSetDimensions();\n\n this._maxLength = this.isHorizontal()\n ? this.width + margins.left + margins.right\n : this.height + margins.top + margins.bottom;\n\n // Data min/max\n if (!this._dataLimitsCached) {\n this.beforeDataLimits();\n this.determineDataLimits();\n this.afterDataLimits();\n this._range = _addGrace(this, grace, beginAtZero);\n this._dataLimitsCached = true;\n }\n\n this.beforeBuildTicks();\n\n this.ticks = this.buildTicks() || [];\n\n // Allow modification of ticks in callback.\n this.afterBuildTicks();\n\n // Compute tick rotation and fit using a sampled subset of labels\n // We generally don't need to compute the size of every single label for determining scale size\n const samplingEnabled = sampleSize < this.ticks.length;\n this._convertTicksToLabels(samplingEnabled ? sample(this.ticks, sampleSize) : this.ticks);\n\n // configure is called twice, once here, once from core.controller.updateLayout.\n // Here we haven't been positioned yet, but dimensions are correct.\n // Variables set in configure are needed for calculateLabelRotation, and\n // it's ok that coordinates are not correct there, only dimensions matter.\n this.configure();\n\n // Tick Rotation\n this.beforeCalculateLabelRotation();\n this.calculateLabelRotation(); // Preconditions: number of ticks and sizes of largest labels must be calculated beforehand\n this.afterCalculateLabelRotation();\n\n // Auto-skip\n if (tickOpts.display && (tickOpts.autoSkip || tickOpts.source === 'auto')) {\n this.ticks = autoSkip(this, this.ticks);\n this._labelSizes = null;\n this.afterAutoSkip();\n }\n\n if (samplingEnabled) {\n // Generate labels using all non-skipped ticks\n this._convertTicksToLabels(this.ticks);\n }\n\n this.beforeFit();\n this.fit(); // Preconditions: label rotation and label sizes must be calculated beforehand\n this.afterFit();\n\n // IMPORTANT: after this point, we consider that `this.ticks` will NEVER change!\n\n this.afterUpdate();\n }\n\n /**\n\t * @protected\n\t */\n configure() {\n let reversePixels = this.options.reverse;\n let startPixel, endPixel;\n\n if (this.isHorizontal()) {\n startPixel = this.left;\n endPixel = this.right;\n } else {\n startPixel = this.top;\n endPixel = this.bottom;\n // by default vertical scales are from bottom to top, so pixels are reversed\n reversePixels = !reversePixels;\n }\n this._startPixel = startPixel;\n this._endPixel = endPixel;\n this._reversePixels = reversePixels;\n this._length = endPixel - startPixel;\n this._alignToPixels = this.options.alignToPixels;\n }\n\n afterUpdate() {\n call(this.options.afterUpdate, [this]);\n }\n\n //\n\n beforeSetDimensions() {\n call(this.options.beforeSetDimensions, [this]);\n }\n setDimensions() {\n // Set the unconstrained dimension before label rotation\n if (this.isHorizontal()) {\n // Reset position before calculating rotation\n this.width = this.maxWidth;\n this.left = 0;\n this.right = this.width;\n } else {\n this.height = this.maxHeight;\n\n // Reset position before calculating rotation\n this.top = 0;\n this.bottom = this.height;\n }\n\n // Reset padding\n this.paddingLeft = 0;\n this.paddingTop = 0;\n this.paddingRight = 0;\n this.paddingBottom = 0;\n }\n afterSetDimensions() {\n call(this.options.afterSetDimensions, [this]);\n }\n\n _callHooks(name) {\n this.chart.notifyPlugins(name, this.getContext());\n call(this.options[name], [this]);\n }\n\n // Data limits\n beforeDataLimits() {\n this._callHooks('beforeDataLimits');\n }\n determineDataLimits() {}\n afterDataLimits() {\n this._callHooks('afterDataLimits');\n }\n\n //\n beforeBuildTicks() {\n this._callHooks('beforeBuildTicks');\n }\n /**\n\t * @return {object[]} the ticks\n\t */\n buildTicks() {\n return [];\n }\n afterBuildTicks() {\n this._callHooks('afterBuildTicks');\n }\n\n beforeTickToLabelConversion() {\n call(this.options.beforeTickToLabelConversion, [this]);\n }\n /**\n\t * Convert ticks to label strings\n\t * @param {Tick[]} ticks\n\t */\n generateTickLabels(ticks) {\n const tickOpts = this.options.ticks;\n let i, ilen, tick;\n for (i = 0, ilen = ticks.length; i < ilen; i++) {\n tick = ticks[i];\n tick.label = call(tickOpts.callback, [tick.value, i, ticks], this);\n }\n }\n afterTickToLabelConversion() {\n call(this.options.afterTickToLabelConversion, [this]);\n }\n\n //\n\n beforeCalculateLabelRotation() {\n call(this.options.beforeCalculateLabelRotation, [this]);\n }\n calculateLabelRotation() {\n const options = this.options;\n const tickOpts = options.ticks;\n const numTicks = getTicksLimit(this.ticks.length, options.ticks.maxTicksLimit);\n const minRotation = tickOpts.minRotation || 0;\n const maxRotation = tickOpts.maxRotation;\n let labelRotation = minRotation;\n let tickWidth, maxHeight, maxLabelDiagonal;\n\n if (!this._isVisible() || !tickOpts.display || minRotation >= maxRotation || numTicks <= 1 || !this.isHorizontal()) {\n this.labelRotation = minRotation;\n return;\n }\n\n const labelSizes = this._getLabelSizes();\n const maxLabelWidth = labelSizes.widest.width;\n const maxLabelHeight = labelSizes.highest.height;\n\n // Estimate the width of each grid based on the canvas width, the maximum\n // label width and the number of tick intervals\n const maxWidth = _limitValue(this.chart.width - maxLabelWidth, 0, this.maxWidth);\n tickWidth = options.offset ? this.maxWidth / numTicks : maxWidth / (numTicks - 1);\n\n // Allow 3 pixels x2 padding either side for label readability\n if (maxLabelWidth + 6 > tickWidth) {\n tickWidth = maxWidth / (numTicks - (options.offset ? 0.5 : 1));\n maxHeight = this.maxHeight - getTickMarkLength(options.grid)\n\t\t\t\t- tickOpts.padding - getTitleHeight(options.title, this.chart.options.font);\n maxLabelDiagonal = Math.sqrt(maxLabelWidth * maxLabelWidth + maxLabelHeight * maxLabelHeight);\n labelRotation = toDegrees(Math.min(\n Math.asin(_limitValue((labelSizes.highest.height + 6) / tickWidth, -1, 1)),\n Math.asin(_limitValue(maxHeight / maxLabelDiagonal, -1, 1)) - Math.asin(_limitValue(maxLabelHeight / maxLabelDiagonal, -1, 1))\n ));\n labelRotation = Math.max(minRotation, Math.min(maxRotation, labelRotation));\n }\n\n this.labelRotation = labelRotation;\n }\n afterCalculateLabelRotation() {\n call(this.options.afterCalculateLabelRotation, [this]);\n }\n afterAutoSkip() {}\n\n //\n\n beforeFit() {\n call(this.options.beforeFit, [this]);\n }\n fit() {\n // Reset\n const minSize = {\n width: 0,\n height: 0\n };\n\n const {chart, options: {ticks: tickOpts, title: titleOpts, grid: gridOpts}} = this;\n const display = this._isVisible();\n const isHorizontal = this.isHorizontal();\n\n if (display) {\n const titleHeight = getTitleHeight(titleOpts, chart.options.font);\n if (isHorizontal) {\n minSize.width = this.maxWidth;\n minSize.height = getTickMarkLength(gridOpts) + titleHeight;\n } else {\n minSize.height = this.maxHeight; // fill all the height\n minSize.width = getTickMarkLength(gridOpts) + titleHeight;\n }\n\n // Don't bother fitting the ticks if we are not showing the labels\n if (tickOpts.display && this.ticks.length) {\n const {first, last, widest, highest} = this._getLabelSizes();\n const tickPadding = tickOpts.padding * 2;\n const angleRadians = toRadians(this.labelRotation);\n const cos = Math.cos(angleRadians);\n const sin = Math.sin(angleRadians);\n\n if (isHorizontal) {\n // A horizontal axis is more constrained by the height.\n const labelHeight = tickOpts.mirror ? 0 : sin * widest.width + cos * highest.height;\n minSize.height = Math.min(this.maxHeight, minSize.height + labelHeight + tickPadding);\n } else {\n // A vertical axis is more constrained by the width. Labels are the\n // dominant factor here, so get that length first and account for padding\n const labelWidth = tickOpts.mirror ? 0 : cos * widest.width + sin * highest.height;\n\n minSize.width = Math.min(this.maxWidth, minSize.width + labelWidth + tickPadding);\n }\n this._calculatePadding(first, last, sin, cos);\n }\n }\n\n this._handleMargins();\n\n if (isHorizontal) {\n this.width = this._length = chart.width - this._margins.left - this._margins.right;\n this.height = minSize.height;\n } else {\n this.width = minSize.width;\n this.height = this._length = chart.height - this._margins.top - this._margins.bottom;\n }\n }\n\n _calculatePadding(first, last, sin, cos) {\n const {ticks: {align, padding}, position} = this.options;\n const isRotated = this.labelRotation !== 0;\n const labelsBelowTicks = position !== 'top' && this.axis === 'x';\n\n if (this.isHorizontal()) {\n const offsetLeft = this.getPixelForTick(0) - this.left;\n const offsetRight = this.right - this.getPixelForTick(this.ticks.length - 1);\n let paddingLeft = 0;\n let paddingRight = 0;\n\n // Ensure that our ticks are always inside the canvas. When rotated, ticks are right aligned\n // which means that the right padding is dominated by the font height\n if (isRotated) {\n if (labelsBelowTicks) {\n paddingLeft = cos * first.width;\n paddingRight = sin * last.height;\n } else {\n paddingLeft = sin * first.height;\n paddingRight = cos * last.width;\n }\n } else if (align === 'start') {\n paddingRight = last.width;\n } else if (align === 'end') {\n paddingLeft = first.width;\n } else if (align !== 'inner') {\n paddingLeft = first.width / 2;\n paddingRight = last.width / 2;\n }\n\n // Adjust padding taking into account changes in offsets\n this.paddingLeft = Math.max((paddingLeft - offsetLeft + padding) * this.width / (this.width - offsetLeft), 0);\n this.paddingRight = Math.max((paddingRight - offsetRight + padding) * this.width / (this.width - offsetRight), 0);\n } else {\n let paddingTop = last.height / 2;\n let paddingBottom = first.height / 2;\n\n if (align === 'start') {\n paddingTop = 0;\n paddingBottom = first.height;\n } else if (align === 'end') {\n paddingTop = last.height;\n paddingBottom = 0;\n }\n\n this.paddingTop = paddingTop + padding;\n this.paddingBottom = paddingBottom + padding;\n }\n }\n\n /**\n\t * Handle margins and padding interactions\n\t * @private\n\t */\n _handleMargins() {\n if (this._margins) {\n this._margins.left = Math.max(this.paddingLeft, this._margins.left);\n this._margins.top = Math.max(this.paddingTop, this._margins.top);\n this._margins.right = Math.max(this.paddingRight, this._margins.right);\n this._margins.bottom = Math.max(this.paddingBottom, this._margins.bottom);\n }\n }\n\n afterFit() {\n call(this.options.afterFit, [this]);\n }\n\n // Shared Methods\n /**\n\t * @return {boolean}\n\t */\n isHorizontal() {\n const {axis, position} = this.options;\n return position === 'top' || position === 'bottom' || axis === 'x';\n }\n /**\n\t * @return {boolean}\n\t */\n isFullSize() {\n return this.options.fullSize;\n }\n\n /**\n\t * @param {Tick[]} ticks\n\t * @private\n\t */\n _convertTicksToLabels(ticks) {\n this.beforeTickToLabelConversion();\n\n this.generateTickLabels(ticks);\n\n // Ticks should be skipped when callback returns null or undef, so lets remove those.\n let i, ilen;\n for (i = 0, ilen = ticks.length; i < ilen; i++) {\n if (isNullOrUndef(ticks[i].label)) {\n ticks.splice(i, 1);\n ilen--;\n i--;\n }\n }\n\n this.afterTickToLabelConversion();\n }\n\n /**\n\t * @return {{ first: object, last: object, widest: object, highest: object, widths: Array, heights: array }}\n\t * @private\n\t */\n _getLabelSizes() {\n let labelSizes = this._labelSizes;\n\n if (!labelSizes) {\n const sampleSize = this.options.ticks.sampleSize;\n let ticks = this.ticks;\n if (sampleSize < ticks.length) {\n ticks = sample(ticks, sampleSize);\n }\n\n this._labelSizes = labelSizes = this._computeLabelSizes(ticks, ticks.length, this.options.ticks.maxTicksLimit);\n }\n\n return labelSizes;\n }\n\n /**\n\t * Returns {width, height, offset} objects for the first, last, widest, highest tick\n\t * labels where offset indicates the anchor point offset from the top in pixels.\n\t * @return {{ first: object, last: object, widest: object, highest: object, widths: Array, heights: array }}\n\t * @private\n\t */\n _computeLabelSizes(ticks, length, maxTicksLimit) {\n const {ctx, _longestTextCache: caches} = this;\n const widths = [];\n const heights = [];\n const increment = Math.floor(length / getTicksLimit(length, maxTicksLimit));\n let widestLabelSize = 0;\n let highestLabelSize = 0;\n let i, j, jlen, label, tickFont, fontString, cache, lineHeight, width, height, nestedLabel;\n\n for (i = 0; i < length; i += increment) {\n label = ticks[i].label;\n tickFont = this._resolveTickFontOptions(i);\n ctx.font = fontString = tickFont.string;\n cache = caches[fontString] = caches[fontString] || {data: {}, gc: []};\n lineHeight = tickFont.lineHeight;\n width = height = 0;\n // Undefined labels and arrays should not be measured\n if (!isNullOrUndef(label) && !isArray(label)) {\n width = _measureText(ctx, cache.data, cache.gc, width, label);\n height = lineHeight;\n } else if (isArray(label)) {\n // if it is an array let's measure each element\n for (j = 0, jlen = label.length; j < jlen; ++j) {\n nestedLabel = /** @type {string} */ (label[j]);\n // Undefined labels and arrays should not be measured\n if (!isNullOrUndef(nestedLabel) && !isArray(nestedLabel)) {\n width = _measureText(ctx, cache.data, cache.gc, width, nestedLabel);\n height += lineHeight;\n }\n }\n }\n widths.push(width);\n heights.push(height);\n widestLabelSize = Math.max(width, widestLabelSize);\n highestLabelSize = Math.max(height, highestLabelSize);\n }\n garbageCollect(caches, length);\n\n const widest = widths.indexOf(widestLabelSize);\n const highest = heights.indexOf(highestLabelSize);\n\n const valueAt = (idx) => ({width: widths[idx] || 0, height: heights[idx] || 0});\n\n return {\n first: valueAt(0),\n last: valueAt(length - 1),\n widest: valueAt(widest),\n highest: valueAt(highest),\n widths,\n heights,\n };\n }\n\n /**\n\t * Used to get the label to display in the tooltip for the given value\n\t * @param {*} value\n\t * @return {string}\n\t */\n getLabelForValue(value) {\n return value;\n }\n\n /**\n\t * Returns the location of the given data point. Value can either be an index or a numerical value\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\n\t * @param {*} value\n\t * @param {number} [index]\n\t * @return {number}\n\t */\n getPixelForValue(value, index) { // eslint-disable-line no-unused-vars\n return NaN;\n }\n\n /**\n\t * Used to get the data value from a given pixel. This is the inverse of getPixelForValue\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\n\t * @param {number} pixel\n\t * @return {*}\n\t */\n getValueForPixel(pixel) {} // eslint-disable-line no-unused-vars\n\n /**\n\t * Returns the location of the tick at the given index\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\n\t * @param {number} index\n\t * @return {number}\n\t */\n getPixelForTick(index) {\n const ticks = this.ticks;\n if (index < 0 || index > ticks.length - 1) {\n return null;\n }\n return this.getPixelForValue(ticks[index].value);\n }\n\n /**\n\t * Utility for getting the pixel location of a percentage of scale\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\n\t * @param {number} decimal\n\t * @return {number}\n\t */\n getPixelForDecimal(decimal) {\n if (this._reversePixels) {\n decimal = 1 - decimal;\n }\n\n const pixel = this._startPixel + decimal * this._length;\n return _int16Range(this._alignToPixels ? _alignPixel(this.chart, pixel, 0) : pixel);\n }\n\n /**\n\t * @param {number} pixel\n\t * @return {number}\n\t */\n getDecimalForPixel(pixel) {\n const decimal = (pixel - this._startPixel) / this._length;\n return this._reversePixels ? 1 - decimal : decimal;\n }\n\n /**\n\t * Returns the pixel for the minimum chart value\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\n\t * @return {number}\n\t */\n getBasePixel() {\n return this.getPixelForValue(this.getBaseValue());\n }\n\n /**\n\t * @return {number}\n\t */\n getBaseValue() {\n const {min, max} = this;\n\n return min < 0 && max < 0 ? max :\n min > 0 && max > 0 ? min :\n 0;\n }\n\n /**\n\t * @protected\n\t */\n getContext(index) {\n const ticks = this.ticks || [];\n\n if (index >= 0 && index < ticks.length) {\n const tick = ticks[index];\n return tick.$context ||\n\t\t\t\t(tick.$context = createTickContext(this.getContext(), index, tick));\n }\n return this.$context ||\n\t\t\t(this.$context = createScaleContext(this.chart.getContext(), this));\n }\n\n /**\n\t * @return {number}\n\t * @private\n\t */\n _tickSize() {\n const optionTicks = this.options.ticks;\n\n // Calculate space needed by label in axis direction.\n const rot = toRadians(this.labelRotation);\n const cos = Math.abs(Math.cos(rot));\n const sin = Math.abs(Math.sin(rot));\n\n const labelSizes = this._getLabelSizes();\n const padding = optionTicks.autoSkipPadding || 0;\n const w = labelSizes ? labelSizes.widest.width + padding : 0;\n const h = labelSizes ? labelSizes.highest.height + padding : 0;\n\n // Calculate space needed for 1 tick in axis direction.\n return this.isHorizontal()\n ? h * cos > w * sin ? w / cos : h / sin\n : h * sin < w * cos ? h / cos : w / sin;\n }\n\n /**\n\t * @return {boolean}\n\t * @private\n\t */\n _isVisible() {\n const display = this.options.display;\n\n if (display !== 'auto') {\n return !!display;\n }\n\n return this.getMatchingVisibleMetas().length > 0;\n }\n\n /**\n\t * @private\n\t */\n _computeGridLineItems(chartArea) {\n const axis = this.axis;\n const chart = this.chart;\n const options = this.options;\n const {grid, position, border} = options;\n const offset = grid.offset;\n const isHorizontal = this.isHorizontal();\n const ticks = this.ticks;\n const ticksLength = ticks.length + (offset ? 1 : 0);\n const tl = getTickMarkLength(grid);\n const items = [];\n\n const borderOpts = border.setContext(this.getContext());\n const axisWidth = borderOpts.display ? borderOpts.width : 0;\n const axisHalfWidth = axisWidth / 2;\n const alignBorderValue = function(pixel) {\n return _alignPixel(chart, pixel, axisWidth);\n };\n let borderValue, i, lineValue, alignedLineValue;\n let tx1, ty1, tx2, ty2, x1, y1, x2, y2;\n\n if (position === 'top') {\n borderValue = alignBorderValue(this.bottom);\n ty1 = this.bottom - tl;\n ty2 = borderValue - axisHalfWidth;\n y1 = alignBorderValue(chartArea.top) + axisHalfWidth;\n y2 = chartArea.bottom;\n } else if (position === 'bottom') {\n borderValue = alignBorderValue(this.top);\n y1 = chartArea.top;\n y2 = alignBorderValue(chartArea.bottom) - axisHalfWidth;\n ty1 = borderValue + axisHalfWidth;\n ty2 = this.top + tl;\n } else if (position === 'left') {\n borderValue = alignBorderValue(this.right);\n tx1 = this.right - tl;\n tx2 = borderValue - axisHalfWidth;\n x1 = alignBorderValue(chartArea.left) + axisHalfWidth;\n x2 = chartArea.right;\n } else if (position === 'right') {\n borderValue = alignBorderValue(this.left);\n x1 = chartArea.left;\n x2 = alignBorderValue(chartArea.right) - axisHalfWidth;\n tx1 = borderValue + axisHalfWidth;\n tx2 = this.left + tl;\n } else if (axis === 'x') {\n if (position === 'center') {\n borderValue = alignBorderValue((chartArea.top + chartArea.bottom) / 2 + 0.5);\n } else if (isObject(position)) {\n const positionAxisID = Object.keys(position)[0];\n const value = position[positionAxisID];\n borderValue = alignBorderValue(this.chart.scales[positionAxisID].getPixelForValue(value));\n }\n\n y1 = chartArea.top;\n y2 = chartArea.bottom;\n ty1 = borderValue + axisHalfWidth;\n ty2 = ty1 + tl;\n } else if (axis === 'y') {\n if (position === 'center') {\n borderValue = alignBorderValue((chartArea.left + chartArea.right) / 2);\n } else if (isObject(position)) {\n const positionAxisID = Object.keys(position)[0];\n const value = position[positionAxisID];\n borderValue = alignBorderValue(this.chart.scales[positionAxisID].getPixelForValue(value));\n }\n\n tx1 = borderValue - axisHalfWidth;\n tx2 = tx1 - tl;\n x1 = chartArea.left;\n x2 = chartArea.right;\n }\n\n const limit = valueOrDefault(options.ticks.maxTicksLimit, ticksLength);\n const step = Math.max(1, Math.ceil(ticksLength / limit));\n for (i = 0; i < ticksLength; i += step) {\n const context = this.getContext(i);\n const optsAtIndex = grid.setContext(context);\n const optsAtIndexBorder = border.setContext(context);\n\n const lineWidth = optsAtIndex.lineWidth;\n const lineColor = optsAtIndex.color;\n const borderDash = optsAtIndexBorder.dash || [];\n const borderDashOffset = optsAtIndexBorder.dashOffset;\n\n const tickWidth = optsAtIndex.tickWidth;\n const tickColor = optsAtIndex.tickColor;\n const tickBorderDash = optsAtIndex.tickBorderDash || [];\n const tickBorderDashOffset = optsAtIndex.tickBorderDashOffset;\n\n lineValue = getPixelForGridLine(this, i, offset);\n\n // Skip if the pixel is out of the range\n if (lineValue === undefined) {\n continue;\n }\n\n alignedLineValue = _alignPixel(chart, lineValue, lineWidth);\n\n if (isHorizontal) {\n tx1 = tx2 = x1 = x2 = alignedLineValue;\n } else {\n ty1 = ty2 = y1 = y2 = alignedLineValue;\n }\n\n items.push({\n tx1,\n ty1,\n tx2,\n ty2,\n x1,\n y1,\n x2,\n y2,\n width: lineWidth,\n color: lineColor,\n borderDash,\n borderDashOffset,\n tickWidth,\n tickColor,\n tickBorderDash,\n tickBorderDashOffset,\n });\n }\n\n this._ticksLength = ticksLength;\n this._borderValue = borderValue;\n\n return items;\n }\n\n /**\n\t * @private\n\t */\n _computeLabelItems(chartArea) {\n const axis = this.axis;\n const options = this.options;\n const {position, ticks: optionTicks} = options;\n const isHorizontal = this.isHorizontal();\n const ticks = this.ticks;\n const {align, crossAlign, padding, mirror} = optionTicks;\n const tl = getTickMarkLength(options.grid);\n const tickAndPadding = tl + padding;\n const hTickAndPadding = mirror ? -padding : tickAndPadding;\n const rotation = -toRadians(this.labelRotation);\n const items = [];\n let i, ilen, tick, label, x, y, textAlign, pixel, font, lineHeight, lineCount, textOffset;\n let textBaseline = 'middle';\n\n if (position === 'top') {\n y = this.bottom - hTickAndPadding;\n textAlign = this._getXAxisLabelAlignment();\n } else if (position === 'bottom') {\n y = this.top + hTickAndPadding;\n textAlign = this._getXAxisLabelAlignment();\n } else if (position === 'left') {\n const ret = this._getYAxisLabelAlignment(tl);\n textAlign = ret.textAlign;\n x = ret.x;\n } else if (position === 'right') {\n const ret = this._getYAxisLabelAlignment(tl);\n textAlign = ret.textAlign;\n x = ret.x;\n } else if (axis === 'x') {\n if (position === 'center') {\n y = ((chartArea.top + chartArea.bottom) / 2) + tickAndPadding;\n } else if (isObject(position)) {\n const positionAxisID = Object.keys(position)[0];\n const value = position[positionAxisID];\n y = this.chart.scales[positionAxisID].getPixelForValue(value) + tickAndPadding;\n }\n textAlign = this._getXAxisLabelAlignment();\n } else if (axis === 'y') {\n if (position === 'center') {\n x = ((chartArea.left + chartArea.right) / 2) - tickAndPadding;\n } else if (isObject(position)) {\n const positionAxisID = Object.keys(position)[0];\n const value = position[positionAxisID];\n x = this.chart.scales[positionAxisID].getPixelForValue(value);\n }\n textAlign = this._getYAxisLabelAlignment(tl).textAlign;\n }\n\n if (axis === 'y') {\n if (align === 'start') {\n textBaseline = 'top';\n } else if (align === 'end') {\n textBaseline = 'bottom';\n }\n }\n\n const labelSizes = this._getLabelSizes();\n for (i = 0, ilen = ticks.length; i < ilen; ++i) {\n tick = ticks[i];\n label = tick.label;\n\n const optsAtIndex = optionTicks.setContext(this.getContext(i));\n pixel = this.getPixelForTick(i) + optionTicks.labelOffset;\n font = this._resolveTickFontOptions(i);\n lineHeight = font.lineHeight;\n lineCount = isArray(label) ? label.length : 1;\n const halfCount = lineCount / 2;\n const color = optsAtIndex.color;\n const strokeColor = optsAtIndex.textStrokeColor;\n const strokeWidth = optsAtIndex.textStrokeWidth;\n let tickTextAlign = textAlign;\n\n if (isHorizontal) {\n x = pixel;\n\n if (textAlign === 'inner') {\n if (i === ilen - 1) {\n tickTextAlign = !this.options.reverse ? 'right' : 'left';\n } else if (i === 0) {\n tickTextAlign = !this.options.reverse ? 'left' : 'right';\n } else {\n tickTextAlign = 'center';\n }\n }\n\n if (position === 'top') {\n if (crossAlign === 'near' || rotation !== 0) {\n textOffset = -lineCount * lineHeight + lineHeight / 2;\n } else if (crossAlign === 'center') {\n textOffset = -labelSizes.highest.height / 2 - halfCount * lineHeight + lineHeight;\n } else {\n textOffset = -labelSizes.highest.height + lineHeight / 2;\n }\n } else {\n // eslint-disable-next-line no-lonely-if\n if (crossAlign === 'near' || rotation !== 0) {\n textOffset = lineHeight / 2;\n } else if (crossAlign === 'center') {\n textOffset = labelSizes.highest.height / 2 - halfCount * lineHeight;\n } else {\n textOffset = labelSizes.highest.height - lineCount * lineHeight;\n }\n }\n if (mirror) {\n textOffset *= -1;\n }\n if (rotation !== 0 && !optsAtIndex.showLabelBackdrop) {\n x += (lineHeight / 2) * Math.sin(rotation);\n }\n } else {\n y = pixel;\n textOffset = (1 - lineCount) * lineHeight / 2;\n }\n\n let backdrop;\n\n if (optsAtIndex.showLabelBackdrop) {\n const labelPadding = toPadding(optsAtIndex.backdropPadding);\n const height = labelSizes.heights[i];\n const width = labelSizes.widths[i];\n\n let top = textOffset - labelPadding.top;\n let left = 0 - labelPadding.left;\n\n switch (textBaseline) {\n case 'middle':\n top -= height / 2;\n break;\n case 'bottom':\n top -= height;\n break;\n default:\n break;\n }\n\n switch (textAlign) {\n case 'center':\n left -= width / 2;\n break;\n case 'right':\n left -= width;\n break;\n case 'inner':\n if (i === ilen - 1) {\n left -= width;\n } else if (i > 0) {\n left -= width / 2;\n }\n break;\n default:\n break;\n }\n\n backdrop = {\n left,\n top,\n width: width + labelPadding.width,\n height: height + labelPadding.height,\n\n color: optsAtIndex.backdropColor,\n };\n }\n\n items.push({\n label,\n font,\n textOffset,\n options: {\n rotation,\n color,\n strokeColor,\n strokeWidth,\n textAlign: tickTextAlign,\n textBaseline,\n translation: [x, y],\n backdrop,\n }\n });\n }\n\n return items;\n }\n\n _getXAxisLabelAlignment() {\n const {position, ticks} = this.options;\n const rotation = -toRadians(this.labelRotation);\n\n if (rotation) {\n return position === 'top' ? 'left' : 'right';\n }\n\n let align = 'center';\n\n if (ticks.align === 'start') {\n align = 'left';\n } else if (ticks.align === 'end') {\n align = 'right';\n } else if (ticks.align === 'inner') {\n align = 'inner';\n }\n\n return align;\n }\n\n _getYAxisLabelAlignment(tl) {\n const {position, ticks: {crossAlign, mirror, padding}} = this.options;\n const labelSizes = this._getLabelSizes();\n const tickAndPadding = tl + padding;\n const widest = labelSizes.widest.width;\n\n let textAlign;\n let x;\n\n if (position === 'left') {\n if (mirror) {\n x = this.right + padding;\n\n if (crossAlign === 'near') {\n textAlign = 'left';\n } else if (crossAlign === 'center') {\n textAlign = 'center';\n x += (widest / 2);\n } else {\n textAlign = 'right';\n x += widest;\n }\n } else {\n x = this.right - tickAndPadding;\n\n if (crossAlign === 'near') {\n textAlign = 'right';\n } else if (crossAlign === 'center') {\n textAlign = 'center';\n x -= (widest / 2);\n } else {\n textAlign = 'left';\n x = this.left;\n }\n }\n } else if (position === 'right') {\n if (mirror) {\n x = this.left + padding;\n\n if (crossAlign === 'near') {\n textAlign = 'right';\n } else if (crossAlign === 'center') {\n textAlign = 'center';\n x -= (widest / 2);\n } else {\n textAlign = 'left';\n x -= widest;\n }\n } else {\n x = this.left + tickAndPadding;\n\n if (crossAlign === 'near') {\n textAlign = 'left';\n } else if (crossAlign === 'center') {\n textAlign = 'center';\n x += widest / 2;\n } else {\n textAlign = 'right';\n x = this.right;\n }\n }\n } else {\n textAlign = 'right';\n }\n\n return {textAlign, x};\n }\n\n /**\n\t * @private\n\t */\n _computeLabelArea() {\n if (this.options.ticks.mirror) {\n return;\n }\n\n const chart = this.chart;\n const position = this.options.position;\n\n if (position === 'left' || position === 'right') {\n return {top: 0, left: this.left, bottom: chart.height, right: this.right};\n } if (position === 'top' || position === 'bottom') {\n return {top: this.top, left: 0, bottom: this.bottom, right: chart.width};\n }\n }\n\n /**\n * @protected\n */\n drawBackground() {\n const {ctx, options: {backgroundColor}, left, top, width, height} = this;\n if (backgroundColor) {\n ctx.save();\n ctx.fillStyle = backgroundColor;\n ctx.fillRect(left, top, width, height);\n ctx.restore();\n }\n }\n\n getLineWidthForValue(value) {\n const grid = this.options.grid;\n if (!this._isVisible() || !grid.display) {\n return 0;\n }\n const ticks = this.ticks;\n const index = ticks.findIndex(t => t.value === value);\n if (index >= 0) {\n const opts = grid.setContext(this.getContext(index));\n return opts.lineWidth;\n }\n return 0;\n }\n\n /**\n\t * @protected\n\t */\n drawGrid(chartArea) {\n const grid = this.options.grid;\n const ctx = this.ctx;\n const items = this._gridLineItems || (this._gridLineItems = this._computeGridLineItems(chartArea));\n let i, ilen;\n\n const drawLine = (p1, p2, style) => {\n if (!style.width || !style.color) {\n return;\n }\n ctx.save();\n ctx.lineWidth = style.width;\n ctx.strokeStyle = style.color;\n ctx.setLineDash(style.borderDash || []);\n ctx.lineDashOffset = style.borderDashOffset;\n\n ctx.beginPath();\n ctx.moveTo(p1.x, p1.y);\n ctx.lineTo(p2.x, p2.y);\n ctx.stroke();\n ctx.restore();\n };\n\n if (grid.display) {\n for (i = 0, ilen = items.length; i < ilen; ++i) {\n const item = items[i];\n\n if (grid.drawOnChartArea) {\n drawLine(\n {x: item.x1, y: item.y1},\n {x: item.x2, y: item.y2},\n item\n );\n }\n\n if (grid.drawTicks) {\n drawLine(\n {x: item.tx1, y: item.ty1},\n {x: item.tx2, y: item.ty2},\n {\n color: item.tickColor,\n width: item.tickWidth,\n borderDash: item.tickBorderDash,\n borderDashOffset: item.tickBorderDashOffset\n }\n );\n }\n }\n }\n }\n\n /**\n\t * @protected\n\t */\n drawBorder() {\n const {chart, ctx, options: {border, grid}} = this;\n const borderOpts = border.setContext(this.getContext());\n const axisWidth = border.display ? borderOpts.width : 0;\n if (!axisWidth) {\n return;\n }\n const lastLineWidth = grid.setContext(this.getContext(0)).lineWidth;\n const borderValue = this._borderValue;\n let x1, x2, y1, y2;\n\n if (this.isHorizontal()) {\n x1 = _alignPixel(chart, this.left, axisWidth) - axisWidth / 2;\n x2 = _alignPixel(chart, this.right, lastLineWidth) + lastLineWidth / 2;\n y1 = y2 = borderValue;\n } else {\n y1 = _alignPixel(chart, this.top, axisWidth) - axisWidth / 2;\n y2 = _alignPixel(chart, this.bottom, lastLineWidth) + lastLineWidth / 2;\n x1 = x2 = borderValue;\n }\n ctx.save();\n ctx.lineWidth = borderOpts.width;\n ctx.strokeStyle = borderOpts.color;\n\n ctx.beginPath();\n ctx.moveTo(x1, y1);\n ctx.lineTo(x2, y2);\n ctx.stroke();\n\n ctx.restore();\n }\n\n /**\n\t * @protected\n\t */\n drawLabels(chartArea) {\n const optionTicks = this.options.ticks;\n\n if (!optionTicks.display) {\n return;\n }\n\n const ctx = this.ctx;\n\n const area = this._computeLabelArea();\n if (area) {\n clipArea(ctx, area);\n }\n\n const items = this.getLabelItems(chartArea);\n for (const item of items) {\n const renderTextOptions = item.options;\n const tickFont = item.font;\n const label = item.label;\n const y = item.textOffset;\n renderText(ctx, label, 0, y, tickFont, renderTextOptions);\n }\n\n if (area) {\n unclipArea(ctx);\n }\n }\n\n /**\n\t * @protected\n\t */\n drawTitle() {\n const {ctx, options: {position, title, reverse}} = this;\n\n if (!title.display) {\n return;\n }\n\n const font = toFont(title.font);\n const padding = toPadding(title.padding);\n const align = title.align;\n let offset = font.lineHeight / 2;\n\n if (position === 'bottom' || position === 'center' || isObject(position)) {\n offset += padding.bottom;\n if (isArray(title.text)) {\n offset += font.lineHeight * (title.text.length - 1);\n }\n } else {\n offset += padding.top;\n }\n\n const {titleX, titleY, maxWidth, rotation} = titleArgs(this, offset, position, align);\n\n renderText(ctx, title.text, 0, 0, font, {\n color: title.color,\n maxWidth,\n rotation,\n textAlign: titleAlign(align, position, reverse),\n textBaseline: 'middle',\n translation: [titleX, titleY],\n });\n }\n\n draw(chartArea) {\n if (!this._isVisible()) {\n return;\n }\n\n this.drawBackground();\n this.drawGrid(chartArea);\n this.drawBorder();\n this.drawTitle();\n this.drawLabels(chartArea);\n }\n\n /**\n\t * @return {object[]}\n\t * @private\n\t */\n _layers() {\n const opts = this.options;\n const tz = opts.ticks && opts.ticks.z || 0;\n const gz = valueOrDefault(opts.grid && opts.grid.z, -1);\n const bz = valueOrDefault(opts.border && opts.border.z, 0);\n\n if (!this._isVisible() || this.draw !== Scale.prototype.draw) {\n // backward compatibility: draw has been overridden by custom scale\n return [{\n z: tz,\n draw: (chartArea) => {\n this.draw(chartArea);\n }\n }];\n }\n\n return [{\n z: gz,\n draw: (chartArea) => {\n this.drawBackground();\n this.drawGrid(chartArea);\n this.drawTitle();\n }\n }, {\n z: bz,\n draw: () => {\n this.drawBorder();\n }\n }, {\n z: tz,\n draw: (chartArea) => {\n this.drawLabels(chartArea);\n }\n }];\n }\n\n /**\n\t * Returns visible dataset metas that are attached to this scale\n\t * @param {string} [type] - if specified, also filter by dataset type\n\t * @return {object[]}\n\t */\n getMatchingVisibleMetas(type) {\n const metas = this.chart.getSortedVisibleDatasetMetas();\n const axisID = this.axis + 'AxisID';\n const result = [];\n let i, ilen;\n\n for (i = 0, ilen = metas.length; i < ilen; ++i) {\n const meta = metas[i];\n if (meta[axisID] === this.id && (!type || meta.type === type)) {\n result.push(meta);\n }\n }\n return result;\n }\n\n /**\n\t * @param {number} index\n\t * @return {object}\n\t * @protected\n \t */\n _resolveTickFontOptions(index) {\n const opts = this.options.ticks.setContext(this.getContext(index));\n return toFont(opts.font);\n }\n\n /**\n * @protected\n */\n _maxDigits() {\n const fontSize = this._resolveTickFontOptions(0).lineHeight;\n return (this.isHorizontal() ? this.width : this.height) / fontSize;\n }\n}\n","import {merge} from '../helpers/index.js';\nimport defaults, {overrides} from './core.defaults.js';\n\n/**\n * @typedef {{id: string, defaults: any, overrides?: any, defaultRoutes: any}} IChartComponent\n */\n\nexport default class TypedRegistry {\n constructor(type, scope, override) {\n this.type = type;\n this.scope = scope;\n this.override = override;\n this.items = Object.create(null);\n }\n\n isForType(type) {\n return Object.prototype.isPrototypeOf.call(this.type.prototype, type.prototype);\n }\n\n /**\n\t * @param {IChartComponent} item\n\t * @returns {string} The scope where items defaults were registered to.\n\t */\n register(item) {\n const proto = Object.getPrototypeOf(item);\n let parentScope;\n\n if (isIChartComponent(proto)) {\n // Make sure the parent is registered and note the scope where its defaults are.\n parentScope = this.register(proto);\n }\n\n const items = this.items;\n const id = item.id;\n const scope = this.scope + '.' + id;\n\n if (!id) {\n throw new Error('class does not have id: ' + item);\n }\n\n if (id in items) {\n // already registered\n return scope;\n }\n\n items[id] = item;\n registerDefaults(item, scope, parentScope);\n if (this.override) {\n defaults.override(item.id, item.overrides);\n }\n\n return scope;\n }\n\n /**\n\t * @param {string} id\n\t * @returns {object?}\n\t */\n get(id) {\n return this.items[id];\n }\n\n /**\n\t * @param {IChartComponent} item\n\t */\n unregister(item) {\n const items = this.items;\n const id = item.id;\n const scope = this.scope;\n\n if (id in items) {\n delete items[id];\n }\n\n if (scope && id in defaults[scope]) {\n delete defaults[scope][id];\n if (this.override) {\n delete overrides[id];\n }\n }\n }\n}\n\nfunction registerDefaults(item, scope, parentScope) {\n // Inherit the parent's defaults and keep existing defaults\n const itemDefaults = merge(Object.create(null), [\n parentScope ? defaults.get(parentScope) : {},\n defaults.get(scope),\n item.defaults\n ]);\n\n defaults.set(scope, itemDefaults);\n\n if (item.defaultRoutes) {\n routeDefaults(scope, item.defaultRoutes);\n }\n\n if (item.descriptors) {\n defaults.describe(scope, item.descriptors);\n }\n}\n\nfunction routeDefaults(scope, routes) {\n Object.keys(routes).forEach(property => {\n const propertyParts = property.split('.');\n const sourceName = propertyParts.pop();\n const sourceScope = [scope].concat(propertyParts).join('.');\n const parts = routes[property].split('.');\n const targetName = parts.pop();\n const targetScope = parts.join('.');\n defaults.route(sourceScope, sourceName, targetScope, targetName);\n });\n}\n\nfunction isIChartComponent(proto) {\n return 'id' in proto && 'defaults' in proto;\n}\n","import DatasetController from './core.datasetController.js';\nimport Element from './core.element.js';\nimport Scale from './core.scale.js';\nimport TypedRegistry from './core.typedRegistry.js';\nimport {each, callback as call, _capitalize} from '../helpers/helpers.core.js';\n\n/**\n * Please use the module's default export which provides a singleton instance\n * Note: class is exported for typedoc\n */\nexport class Registry {\n constructor() {\n this.controllers = new TypedRegistry(DatasetController, 'datasets', true);\n this.elements = new TypedRegistry(Element, 'elements');\n this.plugins = new TypedRegistry(Object, 'plugins');\n this.scales = new TypedRegistry(Scale, 'scales');\n // Order is important, Scale has Element in prototype chain,\n // so Scales must be before Elements. Plugins are a fallback, so not listed here.\n this._typedRegistries = [this.controllers, this.scales, this.elements];\n }\n\n /**\n\t * @param {...any} args\n\t */\n add(...args) {\n this._each('register', args);\n }\n\n remove(...args) {\n this._each('unregister', args);\n }\n\n /**\n\t * @param {...typeof DatasetController} args\n\t */\n addControllers(...args) {\n this._each('register', args, this.controllers);\n }\n\n /**\n\t * @param {...typeof Element} args\n\t */\n addElements(...args) {\n this._each('register', args, this.elements);\n }\n\n /**\n\t * @param {...any} args\n\t */\n addPlugins(...args) {\n this._each('register', args, this.plugins);\n }\n\n /**\n\t * @param {...typeof Scale} args\n\t */\n addScales(...args) {\n this._each('register', args, this.scales);\n }\n\n /**\n\t * @param {string} id\n\t * @returns {typeof DatasetController}\n\t */\n getController(id) {\n return this._get(id, this.controllers, 'controller');\n }\n\n /**\n\t * @param {string} id\n\t * @returns {typeof Element}\n\t */\n getElement(id) {\n return this._get(id, this.elements, 'element');\n }\n\n /**\n\t * @param {string} id\n\t * @returns {object}\n\t */\n getPlugin(id) {\n return this._get(id, this.plugins, 'plugin');\n }\n\n /**\n\t * @param {string} id\n\t * @returns {typeof Scale}\n\t */\n getScale(id) {\n return this._get(id, this.scales, 'scale');\n }\n\n /**\n\t * @param {...typeof DatasetController} args\n\t */\n removeControllers(...args) {\n this._each('unregister', args, this.controllers);\n }\n\n /**\n\t * @param {...typeof Element} args\n\t */\n removeElements(...args) {\n this._each('unregister', args, this.elements);\n }\n\n /**\n\t * @param {...any} args\n\t */\n removePlugins(...args) {\n this._each('unregister', args, this.plugins);\n }\n\n /**\n\t * @param {...typeof Scale} args\n\t */\n removeScales(...args) {\n this._each('unregister', args, this.scales);\n }\n\n /**\n\t * @private\n\t */\n _each(method, args, typedRegistry) {\n [...args].forEach(arg => {\n const reg = typedRegistry || this._getRegistryForType(arg);\n if (typedRegistry || reg.isForType(arg) || (reg === this.plugins && arg.id)) {\n this._exec(method, reg, arg);\n } else {\n // Handle loopable args\n // Use case:\n // import * as plugins from './plugins.js';\n // Chart.register(plugins);\n each(arg, item => {\n // If there are mixed types in the loopable, make sure those are\n // registered in correct registry\n // Use case: (treemap exporting controller, elements etc)\n // import * as treemap from 'chartjs-chart-treemap.js';\n // Chart.register(treemap);\n\n const itemReg = typedRegistry || this._getRegistryForType(item);\n this._exec(method, itemReg, item);\n });\n }\n });\n }\n\n /**\n\t * @private\n\t */\n _exec(method, registry, component) {\n const camelMethod = _capitalize(method);\n call(component['before' + camelMethod], [], component); // beforeRegister / beforeUnregister\n registry[method](component);\n call(component['after' + camelMethod], [], component); // afterRegister / afterUnregister\n }\n\n /**\n\t * @private\n\t */\n _getRegistryForType(type) {\n for (let i = 0; i < this._typedRegistries.length; i++) {\n const reg = this._typedRegistries[i];\n if (reg.isForType(type)) {\n return reg;\n }\n }\n // plugins is the fallback registry\n return this.plugins;\n }\n\n /**\n\t * @private\n\t */\n _get(id, typedRegistry, type) {\n const item = typedRegistry.get(id);\n if (item === undefined) {\n throw new Error('\"' + id + '\" is not a registered ' + type + '.');\n }\n return item;\n }\n\n}\n\n// singleton instance\nexport default /* #__PURE__ */ new Registry();\n","import registry from './core.registry.js';\nimport {callback as callCallback, isNullOrUndef, valueOrDefault} from '../helpers/helpers.core.js';\n\n/**\n * @typedef { import('./core.controller.js').default } Chart\n * @typedef { import('../types/index.js').ChartEvent } ChartEvent\n * @typedef { import('../plugins/plugin.tooltip.js').default } Tooltip\n */\n\n/**\n * @callback filterCallback\n * @param {{plugin: object, options: object}} value\n * @param {number} [index]\n * @param {array} [array]\n * @param {object} [thisArg]\n * @return {boolean}\n */\n\n\nexport default class PluginService {\n constructor() {\n this._init = [];\n }\n\n /**\n\t * Calls enabled plugins for `chart` on the specified hook and with the given args.\n\t * This method immediately returns as soon as a plugin explicitly returns false. The\n\t * returned value can be used, for instance, to interrupt the current action.\n\t * @param {Chart} chart - The chart instance for which plugins should be called.\n\t * @param {string} hook - The name of the plugin method to call (e.g. 'beforeUpdate').\n\t * @param {object} [args] - Extra arguments to apply to the hook call.\n * @param {filterCallback} [filter] - Filtering function for limiting which plugins are notified\n\t * @returns {boolean} false if any of the plugins return false, else returns true.\n\t */\n notify(chart, hook, args, filter) {\n if (hook === 'beforeInit') {\n this._init = this._createDescriptors(chart, true);\n this._notify(this._init, chart, 'install');\n }\n\n const descriptors = filter ? this._descriptors(chart).filter(filter) : this._descriptors(chart);\n const result = this._notify(descriptors, chart, hook, args);\n\n if (hook === 'afterDestroy') {\n this._notify(descriptors, chart, 'stop');\n this._notify(this._init, chart, 'uninstall');\n }\n return result;\n }\n\n /**\n\t * @private\n\t */\n _notify(descriptors, chart, hook, args) {\n args = args || {};\n for (const descriptor of descriptors) {\n const plugin = descriptor.plugin;\n const method = plugin[hook];\n const params = [chart, args, descriptor.options];\n if (callCallback(method, params, plugin) === false && args.cancelable) {\n return false;\n }\n }\n\n return true;\n }\n\n invalidate() {\n // When plugins are registered, there is the possibility of a double\n // invalidate situation. In this case, we only want to invalidate once.\n // If we invalidate multiple times, the `_oldCache` is lost and all of the\n // plugins are restarted without being correctly stopped.\n // See https://github.com/chartjs/Chart.js/issues/8147\n if (!isNullOrUndef(this._cache)) {\n this._oldCache = this._cache;\n this._cache = undefined;\n }\n }\n\n /**\n\t * @param {Chart} chart\n\t * @private\n\t */\n _descriptors(chart) {\n if (this._cache) {\n return this._cache;\n }\n\n const descriptors = this._cache = this._createDescriptors(chart);\n\n this._notifyStateChanges(chart);\n\n return descriptors;\n }\n\n _createDescriptors(chart, all) {\n const config = chart && chart.config;\n const options = valueOrDefault(config.options && config.options.plugins, {});\n const plugins = allPlugins(config);\n // options === false => all plugins are disabled\n return options === false && !all ? [] : createDescriptors(chart, plugins, options, all);\n }\n\n /**\n\t * @param {Chart} chart\n\t * @private\n\t */\n _notifyStateChanges(chart) {\n const previousDescriptors = this._oldCache || [];\n const descriptors = this._cache;\n const diff = (a, b) => a.filter(x => !b.some(y => x.plugin.id === y.plugin.id));\n this._notify(diff(previousDescriptors, descriptors), chart, 'stop');\n this._notify(diff(descriptors, previousDescriptors), chart, 'start');\n }\n}\n\n/**\n * @param {import('./core.config.js').default} config\n */\nfunction allPlugins(config) {\n const localIds = {};\n const plugins = [];\n const keys = Object.keys(registry.plugins.items);\n for (let i = 0; i < keys.length; i++) {\n plugins.push(registry.getPlugin(keys[i]));\n }\n\n const local = config.plugins || [];\n for (let i = 0; i < local.length; i++) {\n const plugin = local[i];\n\n if (plugins.indexOf(plugin) === -1) {\n plugins.push(plugin);\n localIds[plugin.id] = true;\n }\n }\n\n return {plugins, localIds};\n}\n\nfunction getOpts(options, all) {\n if (!all && options === false) {\n return null;\n }\n if (options === true) {\n return {};\n }\n return options;\n}\n\nfunction createDescriptors(chart, {plugins, localIds}, options, all) {\n const result = [];\n const context = chart.getContext();\n\n for (const plugin of plugins) {\n const id = plugin.id;\n const opts = getOpts(options[id], all);\n if (opts === null) {\n continue;\n }\n result.push({\n plugin,\n options: pluginOpts(chart.config, {plugin, local: localIds[id]}, opts, context)\n });\n }\n\n return result;\n}\n\nfunction pluginOpts(config, {plugin, local}, opts, context) {\n const keys = config.pluginScopeKeys(plugin);\n const scopes = config.getOptionScopes(opts, keys);\n if (local && plugin.defaults) {\n // make sure plugin defaults are in scopes for local (not registered) plugins\n scopes.push(plugin.defaults);\n }\n return config.createResolver(scopes, context, [''], {\n // These are just defaults that plugins can override\n scriptable: false,\n indexable: false,\n allKeys: true\n });\n}\n","import defaults, {overrides, descriptors} from './core.defaults.js';\nimport {mergeIf, resolveObjectKey, isArray, isFunction, valueOrDefault, isObject} from '../helpers/helpers.core.js';\nimport {_attachContext, _createResolver, _descriptors} from '../helpers/helpers.config.js';\n\nexport function getIndexAxis(type, options) {\n const datasetDefaults = defaults.datasets[type] || {};\n const datasetOptions = (options.datasets || {})[type] || {};\n return datasetOptions.indexAxis || options.indexAxis || datasetDefaults.indexAxis || 'x';\n}\n\nfunction getAxisFromDefaultScaleID(id, indexAxis) {\n let axis = id;\n if (id === '_index_') {\n axis = indexAxis;\n } else if (id === '_value_') {\n axis = indexAxis === 'x' ? 'y' : 'x';\n }\n return axis;\n}\n\nfunction getDefaultScaleIDFromAxis(axis, indexAxis) {\n return axis === indexAxis ? '_index_' : '_value_';\n}\n\nfunction idMatchesAxis(id) {\n if (id === 'x' || id === 'y' || id === 'r') {\n return id;\n }\n}\n\nfunction axisFromPosition(position) {\n if (position === 'top' || position === 'bottom') {\n return 'x';\n }\n if (position === 'left' || position === 'right') {\n return 'y';\n }\n}\n\nexport function determineAxis(id, ...scaleOptions) {\n if (idMatchesAxis(id)) {\n return id;\n }\n for (const opts of scaleOptions) {\n const axis = opts.axis\n || axisFromPosition(opts.position)\n || id.length > 1 && idMatchesAxis(id[0].toLowerCase());\n if (axis) {\n return axis;\n }\n }\n throw new Error(`Cannot determine type of '${id}' axis. Please provide 'axis' or 'position' option.`);\n}\n\nfunction getAxisFromDataset(id, axis, dataset) {\n if (dataset[axis + 'AxisID'] === id) {\n return {axis};\n }\n}\n\nfunction retrieveAxisFromDatasets(id, config) {\n if (config.data && config.data.datasets) {\n const boundDs = config.data.datasets.filter((d) => d.xAxisID === id || d.yAxisID === id);\n if (boundDs.length) {\n return getAxisFromDataset(id, 'x', boundDs[0]) || getAxisFromDataset(id, 'y', boundDs[0]);\n }\n }\n return {};\n}\n\nfunction mergeScaleConfig(config, options) {\n const chartDefaults = overrides[config.type] || {scales: {}};\n const configScales = options.scales || {};\n const chartIndexAxis = getIndexAxis(config.type, options);\n const scales = Object.create(null);\n\n // First figure out first scale id's per axis.\n Object.keys(configScales).forEach(id => {\n const scaleConf = configScales[id];\n if (!isObject(scaleConf)) {\n return console.error(`Invalid scale configuration for scale: ${id}`);\n }\n if (scaleConf._proxy) {\n return console.warn(`Ignoring resolver passed as options for scale: ${id}`);\n }\n const axis = determineAxis(id, scaleConf, retrieveAxisFromDatasets(id, config), defaults.scales[scaleConf.type]);\n const defaultId = getDefaultScaleIDFromAxis(axis, chartIndexAxis);\n const defaultScaleOptions = chartDefaults.scales || {};\n scales[id] = mergeIf(Object.create(null), [{axis}, scaleConf, defaultScaleOptions[axis], defaultScaleOptions[defaultId]]);\n });\n\n // Then merge dataset defaults to scale configs\n config.data.datasets.forEach(dataset => {\n const type = dataset.type || config.type;\n const indexAxis = dataset.indexAxis || getIndexAxis(type, options);\n const datasetDefaults = overrides[type] || {};\n const defaultScaleOptions = datasetDefaults.scales || {};\n Object.keys(defaultScaleOptions).forEach(defaultID => {\n const axis = getAxisFromDefaultScaleID(defaultID, indexAxis);\n const id = dataset[axis + 'AxisID'] || axis;\n scales[id] = scales[id] || Object.create(null);\n mergeIf(scales[id], [{axis}, configScales[id], defaultScaleOptions[defaultID]]);\n });\n });\n\n // apply scale defaults, if not overridden by dataset defaults\n Object.keys(scales).forEach(key => {\n const scale = scales[key];\n mergeIf(scale, [defaults.scales[scale.type], defaults.scale]);\n });\n\n return scales;\n}\n\nfunction initOptions(config) {\n const options = config.options || (config.options = {});\n\n options.plugins = valueOrDefault(options.plugins, {});\n options.scales = mergeScaleConfig(config, options);\n}\n\nfunction initData(data) {\n data = data || {};\n data.datasets = data.datasets || [];\n data.labels = data.labels || [];\n return data;\n}\n\nfunction initConfig(config) {\n config = config || {};\n config.data = initData(config.data);\n\n initOptions(config);\n\n return config;\n}\n\nconst keyCache = new Map();\nconst keysCached = new Set();\n\nfunction cachedKeys(cacheKey, generate) {\n let keys = keyCache.get(cacheKey);\n if (!keys) {\n keys = generate();\n keyCache.set(cacheKey, keys);\n keysCached.add(keys);\n }\n return keys;\n}\n\nconst addIfFound = (set, obj, key) => {\n const opts = resolveObjectKey(obj, key);\n if (opts !== undefined) {\n set.add(opts);\n }\n};\n\nexport default class Config {\n constructor(config) {\n this._config = initConfig(config);\n this._scopeCache = new Map();\n this._resolverCache = new Map();\n }\n\n get platform() {\n return this._config.platform;\n }\n\n get type() {\n return this._config.type;\n }\n\n set type(type) {\n this._config.type = type;\n }\n\n get data() {\n return this._config.data;\n }\n\n set data(data) {\n this._config.data = initData(data);\n }\n\n get options() {\n return this._config.options;\n }\n\n set options(options) {\n this._config.options = options;\n }\n\n get plugins() {\n return this._config.plugins;\n }\n\n update() {\n const config = this._config;\n this.clearCache();\n initOptions(config);\n }\n\n clearCache() {\n this._scopeCache.clear();\n this._resolverCache.clear();\n }\n\n /**\n * Returns the option scope keys for resolving dataset options.\n * These keys do not include the dataset itself, because it is not under options.\n * @param {string} datasetType\n * @return {string[][]}\n */\n datasetScopeKeys(datasetType) {\n return cachedKeys(datasetType,\n () => [[\n `datasets.${datasetType}`,\n ''\n ]]);\n }\n\n /**\n * Returns the option scope keys for resolving dataset animation options.\n * These keys do not include the dataset itself, because it is not under options.\n * @param {string} datasetType\n * @param {string} transition\n * @return {string[][]}\n */\n datasetAnimationScopeKeys(datasetType, transition) {\n return cachedKeys(`${datasetType}.transition.${transition}`,\n () => [\n [\n `datasets.${datasetType}.transitions.${transition}`,\n `transitions.${transition}`,\n ],\n // The following are used for looking up the `animations` and `animation` keys\n [\n `datasets.${datasetType}`,\n ''\n ]\n ]);\n }\n\n /**\n * Returns the options scope keys for resolving element options that belong\n * to an dataset. These keys do not include the dataset itself, because it\n * is not under options.\n * @param {string} datasetType\n * @param {string} elementType\n * @return {string[][]}\n */\n datasetElementScopeKeys(datasetType, elementType) {\n return cachedKeys(`${datasetType}-${elementType}`,\n () => [[\n `datasets.${datasetType}.elements.${elementType}`,\n `datasets.${datasetType}`,\n `elements.${elementType}`,\n ''\n ]]);\n }\n\n /**\n * Returns the options scope keys for resolving plugin options.\n * @param {{id: string, additionalOptionScopes?: string[]}} plugin\n * @return {string[][]}\n */\n pluginScopeKeys(plugin) {\n const id = plugin.id;\n const type = this.type;\n return cachedKeys(`${type}-plugin-${id}`,\n () => [[\n `plugins.${id}`,\n ...plugin.additionalOptionScopes || [],\n ]]);\n }\n\n /**\n * @private\n */\n _cachedScopes(mainScope, resetCache) {\n const _scopeCache = this._scopeCache;\n let cache = _scopeCache.get(mainScope);\n if (!cache || resetCache) {\n cache = new Map();\n _scopeCache.set(mainScope, cache);\n }\n return cache;\n }\n\n /**\n * Resolves the objects from options and defaults for option value resolution.\n * @param {object} mainScope - The main scope object for options\n * @param {string[][]} keyLists - The arrays of keys in resolution order\n * @param {boolean} [resetCache] - reset the cache for this mainScope\n */\n getOptionScopes(mainScope, keyLists, resetCache) {\n const {options, type} = this;\n const cache = this._cachedScopes(mainScope, resetCache);\n const cached = cache.get(keyLists);\n if (cached) {\n return cached;\n }\n\n const scopes = new Set();\n\n keyLists.forEach(keys => {\n if (mainScope) {\n scopes.add(mainScope);\n keys.forEach(key => addIfFound(scopes, mainScope, key));\n }\n keys.forEach(key => addIfFound(scopes, options, key));\n keys.forEach(key => addIfFound(scopes, overrides[type] || {}, key));\n keys.forEach(key => addIfFound(scopes, defaults, key));\n keys.forEach(key => addIfFound(scopes, descriptors, key));\n });\n\n const array = Array.from(scopes);\n if (array.length === 0) {\n array.push(Object.create(null));\n }\n if (keysCached.has(keyLists)) {\n cache.set(keyLists, array);\n }\n return array;\n }\n\n /**\n * Returns the option scopes for resolving chart options\n * @return {object[]}\n */\n chartOptionScopes() {\n const {options, type} = this;\n\n return [\n options,\n overrides[type] || {},\n defaults.datasets[type] || {}, // https://github.com/chartjs/Chart.js/issues/8531\n {type},\n defaults,\n descriptors\n ];\n }\n\n /**\n * @param {object[]} scopes\n * @param {string[]} names\n * @param {function|object} context\n * @param {string[]} [prefixes]\n * @return {object}\n */\n resolveNamedOptions(scopes, names, context, prefixes = ['']) {\n const result = {$shared: true};\n const {resolver, subPrefixes} = getResolver(this._resolverCache, scopes, prefixes);\n let options = resolver;\n if (needContext(resolver, names)) {\n result.$shared = false;\n context = isFunction(context) ? context() : context;\n // subResolver is passed to scriptable options. It should not resolve to hover options.\n const subResolver = this.createResolver(scopes, context, subPrefixes);\n options = _attachContext(resolver, context, subResolver);\n }\n\n for (const prop of names) {\n result[prop] = options[prop];\n }\n return result;\n }\n\n /**\n * @param {object[]} scopes\n * @param {object} [context]\n * @param {string[]} [prefixes]\n * @param {{scriptable: boolean, indexable: boolean, allKeys?: boolean}} [descriptorDefaults]\n */\n createResolver(scopes, context, prefixes = [''], descriptorDefaults) {\n const {resolver} = getResolver(this._resolverCache, scopes, prefixes);\n return isObject(context)\n ? _attachContext(resolver, context, undefined, descriptorDefaults)\n : resolver;\n }\n}\n\nfunction getResolver(resolverCache, scopes, prefixes) {\n let cache = resolverCache.get(scopes);\n if (!cache) {\n cache = new Map();\n resolverCache.set(scopes, cache);\n }\n const cacheKey = prefixes.join();\n let cached = cache.get(cacheKey);\n if (!cached) {\n const resolver = _createResolver(scopes, prefixes);\n cached = {\n resolver,\n subPrefixes: prefixes.filter(p => !p.toLowerCase().includes('hover'))\n };\n cache.set(cacheKey, cached);\n }\n return cached;\n}\n\nconst hasFunction = value => isObject(value)\n && Object.getOwnPropertyNames(value).some((key) => isFunction(value[key]));\n\nfunction needContext(proxy, names) {\n const {isScriptable, isIndexable} = _descriptors(proxy);\n\n for (const prop of names) {\n const scriptable = isScriptable(prop);\n const indexable = isIndexable(prop);\n const value = (indexable || scriptable) && proxy[prop];\n if ((scriptable && (isFunction(value) || hasFunction(value)))\n || (indexable && isArray(value))) {\n return true;\n }\n }\n return false;\n}\n","import animator from './core.animator.js';\nimport defaults, {overrides} from './core.defaults.js';\nimport Interaction from './core.interaction.js';\nimport layouts from './core.layouts.js';\nimport {_detectPlatform} from '../platform/index.js';\nimport PluginService from './core.plugins.js';\nimport registry from './core.registry.js';\nimport Config, {determineAxis, getIndexAxis} from './core.config.js';\nimport {retinaScale, _isDomSupported} from '../helpers/helpers.dom.js';\nimport {each, callback as callCallback, uid, valueOrDefault, _elementsEqual, isNullOrUndef, setsEqual, defined, isFunction, _isClickEvent} from '../helpers/helpers.core.js';\nimport {clearCanvas, clipArea, createContext, unclipArea, _isPointInArea} from '../helpers/index.js';\n// @ts-ignore\nimport {version} from '../../package.json';\nimport {debounce} from '../helpers/helpers.extras.js';\n\n/**\n * @typedef { import('../types/index.js').ChartEvent } ChartEvent\n * @typedef { import('../types/index.js').Point } Point\n */\n\nconst KNOWN_POSITIONS = ['top', 'bottom', 'left', 'right', 'chartArea'];\nfunction positionIsHorizontal(position, axis) {\n return position === 'top' || position === 'bottom' || (KNOWN_POSITIONS.indexOf(position) === -1 && axis === 'x');\n}\n\nfunction compare2Level(l1, l2) {\n return function(a, b) {\n return a[l1] === b[l1]\n ? a[l2] - b[l2]\n : a[l1] - b[l1];\n };\n}\n\nfunction onAnimationsComplete(context) {\n const chart = context.chart;\n const animationOptions = chart.options.animation;\n\n chart.notifyPlugins('afterRender');\n callCallback(animationOptions && animationOptions.onComplete, [context], chart);\n}\n\nfunction onAnimationProgress(context) {\n const chart = context.chart;\n const animationOptions = chart.options.animation;\n callCallback(animationOptions && animationOptions.onProgress, [context], chart);\n}\n\n/**\n * Chart.js can take a string id of a canvas element, a 2d context, or a canvas element itself.\n * Attempt to unwrap the item passed into the chart constructor so that it is a canvas element (if possible).\n */\nfunction getCanvas(item) {\n if (_isDomSupported() && typeof item === 'string') {\n item = document.getElementById(item);\n } else if (item && item.length) {\n // Support for array based queries (such as jQuery)\n item = item[0];\n }\n\n if (item && item.canvas) {\n // Support for any object associated to a canvas (including a context2d)\n item = item.canvas;\n }\n return item;\n}\n\nconst instances = {};\nconst getChart = (key) => {\n const canvas = getCanvas(key);\n return Object.values(instances).filter((c) => c.canvas === canvas).pop();\n};\n\nfunction moveNumericKeys(obj, start, move) {\n const keys = Object.keys(obj);\n for (const key of keys) {\n const intKey = +key;\n if (intKey >= start) {\n const value = obj[key];\n delete obj[key];\n if (move > 0 || intKey > start) {\n obj[intKey + move] = value;\n }\n }\n }\n}\n\n/**\n * @param {ChartEvent} e\n * @param {ChartEvent|null} lastEvent\n * @param {boolean} inChartArea\n * @param {boolean} isClick\n * @returns {ChartEvent|null}\n */\nfunction determineLastEvent(e, lastEvent, inChartArea, isClick) {\n if (!inChartArea || e.type === 'mouseout') {\n return null;\n }\n if (isClick) {\n return lastEvent;\n }\n return e;\n}\n\nfunction getSizeForArea(scale, chartArea, field) {\n return scale.options.clip ? scale[field] : chartArea[field];\n}\n\nfunction getDatasetArea(meta, chartArea) {\n const {xScale, yScale} = meta;\n if (xScale && yScale) {\n return {\n left: getSizeForArea(xScale, chartArea, 'left'),\n right: getSizeForArea(xScale, chartArea, 'right'),\n top: getSizeForArea(yScale, chartArea, 'top'),\n bottom: getSizeForArea(yScale, chartArea, 'bottom')\n };\n }\n return chartArea;\n}\n\nclass Chart {\n\n static defaults = defaults;\n static instances = instances;\n static overrides = overrides;\n static registry = registry;\n static version = version;\n static getChart = getChart;\n\n static register(...items) {\n registry.add(...items);\n invalidatePlugins();\n }\n\n static unregister(...items) {\n registry.remove(...items);\n invalidatePlugins();\n }\n\n // eslint-disable-next-line max-statements\n constructor(item, userConfig) {\n const config = this.config = new Config(userConfig);\n const initialCanvas = getCanvas(item);\n const existingChart = getChart(initialCanvas);\n if (existingChart) {\n throw new Error(\n 'Canvas is already in use. Chart with ID \\'' + existingChart.id + '\\'' +\n\t\t\t\t' must be destroyed before the canvas with ID \\'' + existingChart.canvas.id + '\\' can be reused.'\n );\n }\n\n const options = config.createResolver(config.chartOptionScopes(), this.getContext());\n\n this.platform = new (config.platform || _detectPlatform(initialCanvas))();\n this.platform.updateConfig(config);\n\n const context = this.platform.acquireContext(initialCanvas, options.aspectRatio);\n const canvas = context && context.canvas;\n const height = canvas && canvas.height;\n const width = canvas && canvas.width;\n\n this.id = uid();\n this.ctx = context;\n this.canvas = canvas;\n this.width = width;\n this.height = height;\n this._options = options;\n // Store the previously used aspect ratio to determine if a resize\n // is needed during updates. Do this after _options is set since\n // aspectRatio uses a getter\n this._aspectRatio = this.aspectRatio;\n this._layers = [];\n this._metasets = [];\n this._stacks = undefined;\n this.boxes = [];\n this.currentDevicePixelRatio = undefined;\n this.chartArea = undefined;\n this._active = [];\n this._lastEvent = undefined;\n this._listeners = {};\n /** @type {?{attach?: function, detach?: function, resize?: function}} */\n this._responsiveListeners = undefined;\n this._sortedMetasets = [];\n this.scales = {};\n this._plugins = new PluginService();\n this.$proxies = {};\n this._hiddenIndices = {};\n this.attached = false;\n this._animationsDisabled = undefined;\n this.$context = undefined;\n this._doResize = debounce(mode => this.update(mode), options.resizeDelay || 0);\n this._dataChanges = [];\n\n // Add the chart instance to the global namespace\n instances[this.id] = this;\n\n if (!context || !canvas) {\n // The given item is not a compatible context2d element, let's return before finalizing\n // the chart initialization but after setting basic chart / controller properties that\n // can help to figure out that the chart is not valid (e.g chart.canvas !== null);\n // https://github.com/chartjs/Chart.js/issues/2807\n console.error(\"Failed to create chart: can't acquire context from the given item\");\n return;\n }\n\n animator.listen(this, 'complete', onAnimationsComplete);\n animator.listen(this, 'progress', onAnimationProgress);\n\n this._initialize();\n if (this.attached) {\n this.update();\n }\n }\n\n get aspectRatio() {\n const {options: {aspectRatio, maintainAspectRatio}, width, height, _aspectRatio} = this;\n if (!isNullOrUndef(aspectRatio)) {\n // If aspectRatio is defined in options, use that.\n return aspectRatio;\n }\n\n if (maintainAspectRatio && _aspectRatio) {\n // If maintainAspectRatio is truthly and we had previously determined _aspectRatio, use that\n return _aspectRatio;\n }\n\n // Calculate\n return height ? width / height : null;\n }\n\n get data() {\n return this.config.data;\n }\n\n set data(data) {\n this.config.data = data;\n }\n\n get options() {\n return this._options;\n }\n\n set options(options) {\n this.config.options = options;\n }\n\n get registry() {\n return registry;\n }\n\n /**\n\t * @private\n\t */\n _initialize() {\n // Before init plugin notification\n this.notifyPlugins('beforeInit');\n\n if (this.options.responsive) {\n this.resize();\n } else {\n retinaScale(this, this.options.devicePixelRatio);\n }\n\n this.bindEvents();\n\n // After init plugin notification\n this.notifyPlugins('afterInit');\n\n return this;\n }\n\n clear() {\n clearCanvas(this.canvas, this.ctx);\n return this;\n }\n\n stop() {\n animator.stop(this);\n return this;\n }\n\n /**\n\t * Resize the chart to its container or to explicit dimensions.\n\t * @param {number} [width]\n\t * @param {number} [height]\n\t */\n resize(width, height) {\n if (!animator.running(this)) {\n this._resize(width, height);\n } else {\n this._resizeBeforeDraw = {width, height};\n }\n }\n\n _resize(width, height) {\n const options = this.options;\n const canvas = this.canvas;\n const aspectRatio = options.maintainAspectRatio && this.aspectRatio;\n const newSize = this.platform.getMaximumSize(canvas, width, height, aspectRatio);\n const newRatio = options.devicePixelRatio || this.platform.getDevicePixelRatio();\n const mode = this.width ? 'resize' : 'attach';\n\n this.width = newSize.width;\n this.height = newSize.height;\n this._aspectRatio = this.aspectRatio;\n if (!retinaScale(this, newRatio, true)) {\n return;\n }\n\n this.notifyPlugins('resize', {size: newSize});\n\n callCallback(options.onResize, [this, newSize], this);\n\n if (this.attached) {\n if (this._doResize(mode)) {\n // The resize update is delayed, only draw without updating.\n this.render();\n }\n }\n }\n\n ensureScalesHaveIDs() {\n const options = this.options;\n const scalesOptions = options.scales || {};\n\n each(scalesOptions, (axisOptions, axisID) => {\n axisOptions.id = axisID;\n });\n }\n\n /**\n\t * Builds a map of scale ID to scale object for future lookup.\n\t */\n buildOrUpdateScales() {\n const options = this.options;\n const scaleOpts = options.scales;\n const scales = this.scales;\n const updated = Object.keys(scales).reduce((obj, id) => {\n obj[id] = false;\n return obj;\n }, {});\n let items = [];\n\n if (scaleOpts) {\n items = items.concat(\n Object.keys(scaleOpts).map((id) => {\n const scaleOptions = scaleOpts[id];\n const axis = determineAxis(id, scaleOptions);\n const isRadial = axis === 'r';\n const isHorizontal = axis === 'x';\n return {\n options: scaleOptions,\n dposition: isRadial ? 'chartArea' : isHorizontal ? 'bottom' : 'left',\n dtype: isRadial ? 'radialLinear' : isHorizontal ? 'category' : 'linear'\n };\n })\n );\n }\n\n each(items, (item) => {\n const scaleOptions = item.options;\n const id = scaleOptions.id;\n const axis = determineAxis(id, scaleOptions);\n const scaleType = valueOrDefault(scaleOptions.type, item.dtype);\n\n if (scaleOptions.position === undefined || positionIsHorizontal(scaleOptions.position, axis) !== positionIsHorizontal(item.dposition)) {\n scaleOptions.position = item.dposition;\n }\n\n updated[id] = true;\n let scale = null;\n if (id in scales && scales[id].type === scaleType) {\n scale = scales[id];\n } else {\n const scaleClass = registry.getScale(scaleType);\n scale = new scaleClass({\n id,\n type: scaleType,\n ctx: this.ctx,\n chart: this\n });\n scales[scale.id] = scale;\n }\n\n scale.init(scaleOptions, options);\n });\n // clear up discarded scales\n each(updated, (hasUpdated, id) => {\n if (!hasUpdated) {\n delete scales[id];\n }\n });\n\n each(scales, (scale) => {\n layouts.configure(this, scale, scale.options);\n layouts.addBox(this, scale);\n });\n }\n\n /**\n\t * @private\n\t */\n _updateMetasets() {\n const metasets = this._metasets;\n const numData = this.data.datasets.length;\n const numMeta = metasets.length;\n\n metasets.sort((a, b) => a.index - b.index);\n if (numMeta > numData) {\n for (let i = numData; i < numMeta; ++i) {\n this._destroyDatasetMeta(i);\n }\n metasets.splice(numData, numMeta - numData);\n }\n this._sortedMetasets = metasets.slice(0).sort(compare2Level('order', 'index'));\n }\n\n /**\n\t * @private\n\t */\n _removeUnreferencedMetasets() {\n const {_metasets: metasets, data: {datasets}} = this;\n if (metasets.length > datasets.length) {\n delete this._stacks;\n }\n metasets.forEach((meta, index) => {\n if (datasets.filter(x => x === meta._dataset).length === 0) {\n this._destroyDatasetMeta(index);\n }\n });\n }\n\n buildOrUpdateControllers() {\n const newControllers = [];\n const datasets = this.data.datasets;\n let i, ilen;\n\n this._removeUnreferencedMetasets();\n\n for (i = 0, ilen = datasets.length; i < ilen; i++) {\n const dataset = datasets[i];\n let meta = this.getDatasetMeta(i);\n const type = dataset.type || this.config.type;\n\n if (meta.type && meta.type !== type) {\n this._destroyDatasetMeta(i);\n meta = this.getDatasetMeta(i);\n }\n meta.type = type;\n meta.indexAxis = dataset.indexAxis || getIndexAxis(type, this.options);\n meta.order = dataset.order || 0;\n meta.index = i;\n meta.label = '' + dataset.label;\n meta.visible = this.isDatasetVisible(i);\n\n if (meta.controller) {\n meta.controller.updateIndex(i);\n meta.controller.linkScales();\n } else {\n const ControllerClass = registry.getController(type);\n const {datasetElementType, dataElementType} = defaults.datasets[type];\n Object.assign(ControllerClass, {\n dataElementType: registry.getElement(dataElementType),\n datasetElementType: datasetElementType && registry.getElement(datasetElementType)\n });\n meta.controller = new ControllerClass(this, i);\n newControllers.push(meta.controller);\n }\n }\n\n this._updateMetasets();\n return newControllers;\n }\n\n /**\n\t * Reset the elements of all datasets\n\t * @private\n\t */\n _resetElements() {\n each(this.data.datasets, (dataset, datasetIndex) => {\n this.getDatasetMeta(datasetIndex).controller.reset();\n }, this);\n }\n\n /**\n\t* Resets the chart back to its state before the initial animation\n\t*/\n reset() {\n this._resetElements();\n this.notifyPlugins('reset');\n }\n\n update(mode) {\n const config = this.config;\n\n config.update();\n const options = this._options = config.createResolver(config.chartOptionScopes(), this.getContext());\n const animsDisabled = this._animationsDisabled = !options.animation;\n\n this._updateScales();\n this._checkEventBindings();\n this._updateHiddenIndices();\n\n // plugins options references might have change, let's invalidate the cache\n // https://github.com/chartjs/Chart.js/issues/5111#issuecomment-355934167\n this._plugins.invalidate();\n\n if (this.notifyPlugins('beforeUpdate', {mode, cancelable: true}) === false) {\n return;\n }\n\n // Make sure dataset controllers are updated and new controllers are reset\n const newControllers = this.buildOrUpdateControllers();\n\n this.notifyPlugins('beforeElementsUpdate');\n\n // Make sure all dataset controllers have correct meta data counts\n let minPadding = 0;\n for (let i = 0, ilen = this.data.datasets.length; i < ilen; i++) {\n const {controller} = this.getDatasetMeta(i);\n const reset = !animsDisabled && newControllers.indexOf(controller) === -1;\n // New controllers will be reset after the layout pass, so we only want to modify\n // elements added to new datasets\n controller.buildOrUpdateElements(reset);\n minPadding = Math.max(+controller.getMaxOverflow(), minPadding);\n }\n minPadding = this._minPadding = options.layout.autoPadding ? minPadding : 0;\n this._updateLayout(minPadding);\n\n // Only reset the controllers if we have animations\n if (!animsDisabled) {\n // Can only reset the new controllers after the scales have been updated\n // Reset is done to get the starting point for the initial animation\n each(newControllers, (controller) => {\n controller.reset();\n });\n }\n\n this._updateDatasets(mode);\n\n // Do this before render so that any plugins that need final scale updates can use it\n this.notifyPlugins('afterUpdate', {mode});\n\n this._layers.sort(compare2Level('z', '_idx'));\n\n // Replay last event from before update, or set hover styles on active elements\n const {_active, _lastEvent} = this;\n if (_lastEvent) {\n this._eventHandler(_lastEvent, true);\n } else if (_active.length) {\n this._updateHoverStyles(_active, _active, true);\n }\n\n this.render();\n }\n\n /**\n * @private\n */\n _updateScales() {\n each(this.scales, (scale) => {\n layouts.removeBox(this, scale);\n });\n\n this.ensureScalesHaveIDs();\n this.buildOrUpdateScales();\n }\n\n /**\n * @private\n */\n _checkEventBindings() {\n const options = this.options;\n const existingEvents = new Set(Object.keys(this._listeners));\n const newEvents = new Set(options.events);\n\n if (!setsEqual(existingEvents, newEvents) || !!this._responsiveListeners !== options.responsive) {\n // The configured events have changed. Rebind.\n this.unbindEvents();\n this.bindEvents();\n }\n }\n\n /**\n * @private\n */\n _updateHiddenIndices() {\n const {_hiddenIndices} = this;\n const changes = this._getUniformDataChanges() || [];\n for (const {method, start, count} of changes) {\n const move = method === '_removeElements' ? -count : count;\n moveNumericKeys(_hiddenIndices, start, move);\n }\n }\n\n /**\n * @private\n */\n _getUniformDataChanges() {\n const _dataChanges = this._dataChanges;\n if (!_dataChanges || !_dataChanges.length) {\n return;\n }\n\n this._dataChanges = [];\n const datasetCount = this.data.datasets.length;\n const makeSet = (idx) => new Set(\n _dataChanges\n .filter(c => c[0] === idx)\n .map((c, i) => i + ',' + c.splice(1).join(','))\n );\n\n const changeSet = makeSet(0);\n for (let i = 1; i < datasetCount; i++) {\n if (!setsEqual(changeSet, makeSet(i))) {\n return;\n }\n }\n return Array.from(changeSet)\n .map(c => c.split(','))\n .map(a => ({method: a[1], start: +a[2], count: +a[3]}));\n }\n\n /**\n\t * Updates the chart layout unless a plugin returns `false` to the `beforeLayout`\n\t * hook, in which case, plugins will not be called on `afterLayout`.\n\t * @private\n\t */\n _updateLayout(minPadding) {\n if (this.notifyPlugins('beforeLayout', {cancelable: true}) === false) {\n return;\n }\n\n layouts.update(this, this.width, this.height, minPadding);\n\n const area = this.chartArea;\n const noArea = area.width <= 0 || area.height <= 0;\n\n this._layers = [];\n each(this.boxes, (box) => {\n if (noArea && box.position === 'chartArea') {\n // Skip drawing and configuring chartArea boxes when chartArea is zero or negative\n return;\n }\n\n // configure is called twice, once in core.scale.update and once here.\n // Here the boxes are fully updated and at their final positions.\n if (box.configure) {\n box.configure();\n }\n this._layers.push(...box._layers());\n }, this);\n\n this._layers.forEach((item, index) => {\n item._idx = index;\n });\n\n this.notifyPlugins('afterLayout');\n }\n\n /**\n\t * Updates all datasets unless a plugin returns `false` to the `beforeDatasetsUpdate`\n\t * hook, in which case, plugins will not be called on `afterDatasetsUpdate`.\n\t * @private\n\t */\n _updateDatasets(mode) {\n if (this.notifyPlugins('beforeDatasetsUpdate', {mode, cancelable: true}) === false) {\n return;\n }\n\n for (let i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {\n this.getDatasetMeta(i).controller.configure();\n }\n\n for (let i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {\n this._updateDataset(i, isFunction(mode) ? mode({datasetIndex: i}) : mode);\n }\n\n this.notifyPlugins('afterDatasetsUpdate', {mode});\n }\n\n /**\n\t * Updates dataset at index unless a plugin returns `false` to the `beforeDatasetUpdate`\n\t * hook, in which case, plugins will not be called on `afterDatasetUpdate`.\n\t * @private\n\t */\n _updateDataset(index, mode) {\n const meta = this.getDatasetMeta(index);\n const args = {meta, index, mode, cancelable: true};\n\n if (this.notifyPlugins('beforeDatasetUpdate', args) === false) {\n return;\n }\n\n meta.controller._update(mode);\n\n args.cancelable = false;\n this.notifyPlugins('afterDatasetUpdate', args);\n }\n\n render() {\n if (this.notifyPlugins('beforeRender', {cancelable: true}) === false) {\n return;\n }\n\n if (animator.has(this)) {\n if (this.attached && !animator.running(this)) {\n animator.start(this);\n }\n } else {\n this.draw();\n onAnimationsComplete({chart: this});\n }\n }\n\n draw() {\n let i;\n if (this._resizeBeforeDraw) {\n const {width, height} = this._resizeBeforeDraw;\n this._resize(width, height);\n this._resizeBeforeDraw = null;\n }\n this.clear();\n\n if (this.width <= 0 || this.height <= 0) {\n return;\n }\n\n if (this.notifyPlugins('beforeDraw', {cancelable: true}) === false) {\n return;\n }\n\n // Because of plugin hooks (before/afterDatasetsDraw), datasets can't\n // currently be part of layers. Instead, we draw\n // layers <= 0 before(default, backward compat), and the rest after\n const layers = this._layers;\n for (i = 0; i < layers.length && layers[i].z <= 0; ++i) {\n layers[i].draw(this.chartArea);\n }\n\n this._drawDatasets();\n\n // Rest of layers\n for (; i < layers.length; ++i) {\n layers[i].draw(this.chartArea);\n }\n\n this.notifyPlugins('afterDraw');\n }\n\n /**\n\t * @private\n\t */\n _getSortedDatasetMetas(filterVisible) {\n const metasets = this._sortedMetasets;\n const result = [];\n let i, ilen;\n\n for (i = 0, ilen = metasets.length; i < ilen; ++i) {\n const meta = metasets[i];\n if (!filterVisible || meta.visible) {\n result.push(meta);\n }\n }\n\n return result;\n }\n\n /**\n\t * Gets the visible dataset metas in drawing order\n\t * @return {object[]}\n\t */\n getSortedVisibleDatasetMetas() {\n return this._getSortedDatasetMetas(true);\n }\n\n /**\n\t * Draws all datasets unless a plugin returns `false` to the `beforeDatasetsDraw`\n\t * hook, in which case, plugins will not be called on `afterDatasetsDraw`.\n\t * @private\n\t */\n _drawDatasets() {\n if (this.notifyPlugins('beforeDatasetsDraw', {cancelable: true}) === false) {\n return;\n }\n\n const metasets = this.getSortedVisibleDatasetMetas();\n for (let i = metasets.length - 1; i >= 0; --i) {\n this._drawDataset(metasets[i]);\n }\n\n this.notifyPlugins('afterDatasetsDraw');\n }\n\n /**\n\t * Draws dataset at index unless a plugin returns `false` to the `beforeDatasetDraw`\n\t * hook, in which case, plugins will not be called on `afterDatasetDraw`.\n\t * @private\n\t */\n _drawDataset(meta) {\n const ctx = this.ctx;\n const clip = meta._clip;\n const useClip = !clip.disabled;\n const area = getDatasetArea(meta, this.chartArea);\n const args = {\n meta,\n index: meta.index,\n cancelable: true\n };\n\n if (this.notifyPlugins('beforeDatasetDraw', args) === false) {\n return;\n }\n\n if (useClip) {\n clipArea(ctx, {\n left: clip.left === false ? 0 : area.left - clip.left,\n right: clip.right === false ? this.width : area.right + clip.right,\n top: clip.top === false ? 0 : area.top - clip.top,\n bottom: clip.bottom === false ? this.height : area.bottom + clip.bottom\n });\n }\n\n meta.controller.draw();\n\n if (useClip) {\n unclipArea(ctx);\n }\n\n args.cancelable = false;\n this.notifyPlugins('afterDatasetDraw', args);\n }\n\n /**\n * Checks whether the given point is in the chart area.\n * @param {Point} point - in relative coordinates (see, e.g., getRelativePosition)\n * @returns {boolean}\n */\n isPointInArea(point) {\n return _isPointInArea(point, this.chartArea, this._minPadding);\n }\n\n getElementsAtEventForMode(e, mode, options, useFinalPosition) {\n const method = Interaction.modes[mode];\n if (typeof method === 'function') {\n return method(this, e, options, useFinalPosition);\n }\n\n return [];\n }\n\n getDatasetMeta(datasetIndex) {\n const dataset = this.data.datasets[datasetIndex];\n const metasets = this._metasets;\n let meta = metasets.filter(x => x && x._dataset === dataset).pop();\n\n if (!meta) {\n meta = {\n type: null,\n data: [],\n dataset: null,\n controller: null,\n hidden: null,\t\t\t// See isDatasetVisible() comment\n xAxisID: null,\n yAxisID: null,\n order: dataset && dataset.order || 0,\n index: datasetIndex,\n _dataset: dataset,\n _parsed: [],\n _sorted: false\n };\n metasets.push(meta);\n }\n\n return meta;\n }\n\n getContext() {\n return this.$context || (this.$context = createContext(null, {chart: this, type: 'chart'}));\n }\n\n getVisibleDatasetCount() {\n return this.getSortedVisibleDatasetMetas().length;\n }\n\n isDatasetVisible(datasetIndex) {\n const dataset = this.data.datasets[datasetIndex];\n if (!dataset) {\n return false;\n }\n\n const meta = this.getDatasetMeta(datasetIndex);\n\n // meta.hidden is a per chart dataset hidden flag override with 3 states: if true or false,\n // the dataset.hidden value is ignored, else if null, the dataset hidden state is returned.\n return typeof meta.hidden === 'boolean' ? !meta.hidden : !dataset.hidden;\n }\n\n setDatasetVisibility(datasetIndex, visible) {\n const meta = this.getDatasetMeta(datasetIndex);\n meta.hidden = !visible;\n }\n\n toggleDataVisibility(index) {\n this._hiddenIndices[index] = !this._hiddenIndices[index];\n }\n\n getDataVisibility(index) {\n return !this._hiddenIndices[index];\n }\n\n /**\n\t * @private\n\t */\n _updateVisibility(datasetIndex, dataIndex, visible) {\n const mode = visible ? 'show' : 'hide';\n const meta = this.getDatasetMeta(datasetIndex);\n const anims = meta.controller._resolveAnimations(undefined, mode);\n\n if (defined(dataIndex)) {\n meta.data[dataIndex].hidden = !visible;\n this.update();\n } else {\n this.setDatasetVisibility(datasetIndex, visible);\n // Animate visible state, so hide animation can be seen. This could be handled better if update / updateDataset returned a Promise.\n anims.update(meta, {visible});\n this.update((ctx) => ctx.datasetIndex === datasetIndex ? mode : undefined);\n }\n }\n\n hide(datasetIndex, dataIndex) {\n this._updateVisibility(datasetIndex, dataIndex, false);\n }\n\n show(datasetIndex, dataIndex) {\n this._updateVisibility(datasetIndex, dataIndex, true);\n }\n\n /**\n\t * @private\n\t */\n _destroyDatasetMeta(datasetIndex) {\n const meta = this._metasets[datasetIndex];\n if (meta && meta.controller) {\n meta.controller._destroy();\n }\n delete this._metasets[datasetIndex];\n }\n\n _stop() {\n let i, ilen;\n this.stop();\n animator.remove(this);\n\n for (i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {\n this._destroyDatasetMeta(i);\n }\n }\n\n destroy() {\n this.notifyPlugins('beforeDestroy');\n const {canvas, ctx} = this;\n\n this._stop();\n this.config.clearCache();\n\n if (canvas) {\n this.unbindEvents();\n clearCanvas(canvas, ctx);\n this.platform.releaseContext(ctx);\n this.canvas = null;\n this.ctx = null;\n }\n\n delete instances[this.id];\n\n this.notifyPlugins('afterDestroy');\n }\n\n toBase64Image(...args) {\n return this.canvas.toDataURL(...args);\n }\n\n /**\n\t * @private\n\t */\n bindEvents() {\n this.bindUserEvents();\n if (this.options.responsive) {\n this.bindResponsiveEvents();\n } else {\n this.attached = true;\n }\n }\n\n /**\n * @private\n */\n bindUserEvents() {\n const listeners = this._listeners;\n const platform = this.platform;\n\n const _add = (type, listener) => {\n platform.addEventListener(this, type, listener);\n listeners[type] = listener;\n };\n\n const listener = (e, x, y) => {\n e.offsetX = x;\n e.offsetY = y;\n this._eventHandler(e);\n };\n\n each(this.options.events, (type) => _add(type, listener));\n }\n\n /**\n * @private\n */\n bindResponsiveEvents() {\n if (!this._responsiveListeners) {\n this._responsiveListeners = {};\n }\n const listeners = this._responsiveListeners;\n const platform = this.platform;\n\n const _add = (type, listener) => {\n platform.addEventListener(this, type, listener);\n listeners[type] = listener;\n };\n const _remove = (type, listener) => {\n if (listeners[type]) {\n platform.removeEventListener(this, type, listener);\n delete listeners[type];\n }\n };\n\n const listener = (width, height) => {\n if (this.canvas) {\n this.resize(width, height);\n }\n };\n\n let detached; // eslint-disable-line prefer-const\n const attached = () => {\n _remove('attach', attached);\n\n this.attached = true;\n this.resize();\n\n _add('resize', listener);\n _add('detach', detached);\n };\n\n detached = () => {\n this.attached = false;\n\n _remove('resize', listener);\n\n // Stop animating and remove metasets, so when re-attached, the animations start from beginning.\n this._stop();\n this._resize(0, 0);\n\n _add('attach', attached);\n };\n\n if (platform.isAttached(this.canvas)) {\n attached();\n } else {\n detached();\n }\n }\n\n /**\n\t * @private\n\t */\n unbindEvents() {\n each(this._listeners, (listener, type) => {\n this.platform.removeEventListener(this, type, listener);\n });\n this._listeners = {};\n\n each(this._responsiveListeners, (listener, type) => {\n this.platform.removeEventListener(this, type, listener);\n });\n this._responsiveListeners = undefined;\n }\n\n updateHoverStyle(items, mode, enabled) {\n const prefix = enabled ? 'set' : 'remove';\n let meta, item, i, ilen;\n\n if (mode === 'dataset') {\n meta = this.getDatasetMeta(items[0].datasetIndex);\n meta.controller['_' + prefix + 'DatasetHoverStyle']();\n }\n\n for (i = 0, ilen = items.length; i < ilen; ++i) {\n item = items[i];\n const controller = item && this.getDatasetMeta(item.datasetIndex).controller;\n if (controller) {\n controller[prefix + 'HoverStyle'](item.element, item.datasetIndex, item.index);\n }\n }\n }\n\n /**\n\t * Get active (hovered) elements\n\t * @returns array\n\t */\n getActiveElements() {\n return this._active || [];\n }\n\n /**\n\t * Set active (hovered) elements\n\t * @param {array} activeElements New active data points\n\t */\n setActiveElements(activeElements) {\n const lastActive = this._active || [];\n const active = activeElements.map(({datasetIndex, index}) => {\n const meta = this.getDatasetMeta(datasetIndex);\n if (!meta) {\n throw new Error('No dataset found at index ' + datasetIndex);\n }\n\n return {\n datasetIndex,\n element: meta.data[index],\n index,\n };\n });\n const changed = !_elementsEqual(active, lastActive);\n\n if (changed) {\n this._active = active;\n // Make sure we don't use the previous mouse event to override the active elements in update.\n this._lastEvent = null;\n this._updateHoverStyles(active, lastActive);\n }\n }\n\n /**\n\t * Calls enabled plugins on the specified hook and with the given args.\n\t * This method immediately returns as soon as a plugin explicitly returns false. The\n\t * returned value can be used, for instance, to interrupt the current action.\n\t * @param {string} hook - The name of the plugin method to call (e.g. 'beforeUpdate').\n\t * @param {Object} [args] - Extra arguments to apply to the hook call.\n * @param {import('./core.plugins.js').filterCallback} [filter] - Filtering function for limiting which plugins are notified\n\t * @returns {boolean} false if any of the plugins return false, else returns true.\n\t */\n notifyPlugins(hook, args, filter) {\n return this._plugins.notify(this, hook, args, filter);\n }\n\n /**\n * Check if a plugin with the specific ID is registered and enabled\n * @param {string} pluginId - The ID of the plugin of which to check if it is enabled\n * @returns {boolean}\n */\n isPluginEnabled(pluginId) {\n return this._plugins._cache.filter(p => p.plugin.id === pluginId).length === 1;\n }\n\n /**\n\t * @private\n\t */\n _updateHoverStyles(active, lastActive, replay) {\n const hoverOptions = this.options.hover;\n const diff = (a, b) => a.filter(x => !b.some(y => x.datasetIndex === y.datasetIndex && x.index === y.index));\n const deactivated = diff(lastActive, active);\n const activated = replay ? active : diff(active, lastActive);\n\n if (deactivated.length) {\n this.updateHoverStyle(deactivated, hoverOptions.mode, false);\n }\n\n if (activated.length && hoverOptions.mode) {\n this.updateHoverStyle(activated, hoverOptions.mode, true);\n }\n }\n\n /**\n\t * @private\n\t */\n _eventHandler(e, replay) {\n const args = {\n event: e,\n replay,\n cancelable: true,\n inChartArea: this.isPointInArea(e)\n };\n const eventFilter = (plugin) => (plugin.options.events || this.options.events).includes(e.native.type);\n\n if (this.notifyPlugins('beforeEvent', args, eventFilter) === false) {\n return;\n }\n\n const changed = this._handleEvent(e, replay, args.inChartArea);\n\n args.cancelable = false;\n this.notifyPlugins('afterEvent', args, eventFilter);\n\n if (changed || args.changed) {\n this.render();\n }\n\n return this;\n }\n\n /**\n\t * Handle an event\n\t * @param {ChartEvent} e the event to handle\n\t * @param {boolean} [replay] - true if the event was replayed by `update`\n * @param {boolean} [inChartArea] - true if the event is inside chartArea\n\t * @return {boolean} true if the chart needs to re-render\n\t * @private\n\t */\n _handleEvent(e, replay, inChartArea) {\n const {_active: lastActive = [], options} = this;\n\n // If the event is replayed from `update`, we should evaluate with the final positions.\n //\n // The `replay`:\n // It's the last event (excluding click) that has occurred before `update`.\n // So mouse has not moved. It's also over the chart, because there is a `replay`.\n //\n // The why:\n // If animations are active, the elements haven't moved yet compared to state before update.\n // But if they will, we are activating the elements that would be active, if this check\n // was done after the animations have completed. => \"final positions\".\n // If there is no animations, the \"final\" and \"current\" positions are equal.\n // This is done so we do not have to evaluate the active elements each animation frame\n // - it would be expensive.\n const useFinalPosition = replay;\n const active = this._getActiveElements(e, lastActive, inChartArea, useFinalPosition);\n const isClick = _isClickEvent(e);\n const lastEvent = determineLastEvent(e, this._lastEvent, inChartArea, isClick);\n\n if (inChartArea) {\n // Set _lastEvent to null while we are processing the event handlers.\n // This prevents recursion if the handler calls chart.update()\n this._lastEvent = null;\n\n // Invoke onHover hook\n callCallback(options.onHover, [e, active, this], this);\n\n if (isClick) {\n callCallback(options.onClick, [e, active, this], this);\n }\n }\n\n const changed = !_elementsEqual(active, lastActive);\n if (changed || replay) {\n this._active = active;\n this._updateHoverStyles(active, lastActive, replay);\n }\n\n this._lastEvent = lastEvent;\n\n return changed;\n }\n\n /**\n * @param {ChartEvent} e - The event\n * @param {import('../types/index.js').ActiveElement[]} lastActive - Previously active elements\n * @param {boolean} inChartArea - Is the envent inside chartArea\n * @param {boolean} useFinalPosition - Should the evaluation be done with current or final (after animation) element positions\n * @returns {import('../types/index.js').ActiveElement[]} - The active elements\n * @pravate\n */\n _getActiveElements(e, lastActive, inChartArea, useFinalPosition) {\n if (e.type === 'mouseout') {\n return [];\n }\n\n if (!inChartArea) {\n // Let user control the active elements outside chartArea. Eg. using Legend.\n return lastActive;\n }\n\n const hoverOptions = this.options.hover;\n return this.getElementsAtEventForMode(e, hoverOptions.mode, hoverOptions, useFinalPosition);\n }\n}\n\n// @ts-ignore\nfunction invalidatePlugins() {\n return each(Chart.instances, (chart) => chart._plugins.invalidate());\n}\n\nexport default Chart;\n","import {_isDomSupported} from '../helpers/index.js';\nimport BasePlatform from './platform.base.js';\nimport BasicPlatform from './platform.basic.js';\nimport DomPlatform from './platform.dom.js';\n\nexport function _detectPlatform(canvas) {\n if (!_isDomSupported() || (typeof OffscreenCanvas !== 'undefined' && canvas instanceof OffscreenCanvas)) {\n return BasicPlatform;\n }\n return DomPlatform;\n}\n\nexport {BasePlatform, BasicPlatform, DomPlatform};\n","import Element from '../core/core.element.js';\nimport {_angleBetween, getAngleFromPoint, TAU, HALF_PI, valueOrDefault} from '../helpers/index.js';\nimport {PI, _isBetween, _limitValue} from '../helpers/helpers.math.js';\nimport {_readValueToProps} from '../helpers/helpers.options.js';\nimport type {ArcOptions, Point} from '../types/index.js';\n\n\nfunction clipArc(ctx: CanvasRenderingContext2D, element: ArcElement, endAngle: number) {\n const {startAngle, pixelMargin, x, y, outerRadius, innerRadius} = element;\n let angleMargin = pixelMargin / outerRadius;\n\n // Draw an inner border by clipping the arc and drawing a double-width border\n // Enlarge the clipping arc by 0.33 pixels to eliminate glitches between borders\n ctx.beginPath();\n ctx.arc(x, y, outerRadius, startAngle - angleMargin, endAngle + angleMargin);\n if (innerRadius > pixelMargin) {\n angleMargin = pixelMargin / innerRadius;\n ctx.arc(x, y, innerRadius, endAngle + angleMargin, startAngle - angleMargin, true);\n } else {\n ctx.arc(x, y, pixelMargin, endAngle + HALF_PI, startAngle - HALF_PI);\n }\n ctx.closePath();\n ctx.clip();\n}\n\nfunction toRadiusCorners(value) {\n return _readValueToProps(value, ['outerStart', 'outerEnd', 'innerStart', 'innerEnd']);\n}\n\n/**\n * Parse border radius from the provided options\n */\nfunction parseBorderRadius(arc: ArcElement, innerRadius: number, outerRadius: number, angleDelta: number) {\n const o = toRadiusCorners(arc.options.borderRadius);\n const halfThickness = (outerRadius - innerRadius) / 2;\n const innerLimit = Math.min(halfThickness, angleDelta * innerRadius / 2);\n\n // Outer limits are complicated. We want to compute the available angular distance at\n // a radius of outerRadius - borderRadius because for small angular distances, this term limits.\n // We compute at r = outerRadius - borderRadius because this circle defines the center of the border corners.\n //\n // If the borderRadius is large, that value can become negative.\n // This causes the outer borders to lose their radius entirely, which is rather unexpected. To solve that, if borderRadius > outerRadius\n // we know that the thickness term will dominate and compute the limits at that point\n const computeOuterLimit = (val) => {\n const outerArcLimit = (outerRadius - Math.min(halfThickness, val)) * angleDelta / 2;\n return _limitValue(val, 0, Math.min(halfThickness, outerArcLimit));\n };\n\n return {\n outerStart: computeOuterLimit(o.outerStart),\n outerEnd: computeOuterLimit(o.outerEnd),\n innerStart: _limitValue(o.innerStart, 0, innerLimit),\n innerEnd: _limitValue(o.innerEnd, 0, innerLimit),\n };\n}\n\n/**\n * Convert (r, 𝜃) to (x, y)\n */\nfunction rThetaToXY(r: number, theta: number, x: number, y: number) {\n return {\n x: x + r * Math.cos(theta),\n y: y + r * Math.sin(theta),\n };\n}\n\n\n/**\n * Path the arc, respecting border radius by separating into left and right halves.\n *\n * Start End\n *\n * 1--->a--->2 Outer\n * / \\\n * 8 3\n * | |\n * | |\n * 7 4\n * \\ /\n * 6<---b<---5 Inner\n */\nfunction pathArc(\n ctx: CanvasRenderingContext2D,\n element: ArcElement,\n offset: number,\n spacing: number,\n end: number,\n circular: boolean,\n) {\n const {x, y, startAngle: start, pixelMargin, innerRadius: innerR} = element;\n\n const outerRadius = Math.max(element.outerRadius + spacing + offset - pixelMargin, 0);\n const innerRadius = innerR > 0 ? innerR + spacing + offset + pixelMargin : 0;\n\n let spacingOffset = 0;\n const alpha = end - start;\n\n if (spacing) {\n // When spacing is present, it is the same for all items\n // So we adjust the start and end angle of the arc such that\n // the distance is the same as it would be without the spacing\n const noSpacingInnerRadius = innerR > 0 ? innerR - spacing : 0;\n const noSpacingOuterRadius = outerRadius > 0 ? outerRadius - spacing : 0;\n const avNogSpacingRadius = (noSpacingInnerRadius + noSpacingOuterRadius) / 2;\n const adjustedAngle = avNogSpacingRadius !== 0 ? (alpha * avNogSpacingRadius) / (avNogSpacingRadius + spacing) : alpha;\n spacingOffset = (alpha - adjustedAngle) / 2;\n }\n\n const beta = Math.max(0.001, alpha * outerRadius - offset / PI) / outerRadius;\n const angleOffset = (alpha - beta) / 2;\n const startAngle = start + angleOffset + spacingOffset;\n const endAngle = end - angleOffset - spacingOffset;\n const {outerStart, outerEnd, innerStart, innerEnd} = parseBorderRadius(element, innerRadius, outerRadius, endAngle - startAngle);\n\n const outerStartAdjustedRadius = outerRadius - outerStart;\n const outerEndAdjustedRadius = outerRadius - outerEnd;\n const outerStartAdjustedAngle = startAngle + outerStart / outerStartAdjustedRadius;\n const outerEndAdjustedAngle = endAngle - outerEnd / outerEndAdjustedRadius;\n\n const innerStartAdjustedRadius = innerRadius + innerStart;\n const innerEndAdjustedRadius = innerRadius + innerEnd;\n const innerStartAdjustedAngle = startAngle + innerStart / innerStartAdjustedRadius;\n const innerEndAdjustedAngle = endAngle - innerEnd / innerEndAdjustedRadius;\n\n ctx.beginPath();\n\n if (circular) {\n // The first arc segments from point 1 to point a to point 2\n const outerMidAdjustedAngle = (outerStartAdjustedAngle + outerEndAdjustedAngle) / 2;\n ctx.arc(x, y, outerRadius, outerStartAdjustedAngle, outerMidAdjustedAngle);\n ctx.arc(x, y, outerRadius, outerMidAdjustedAngle, outerEndAdjustedAngle);\n\n // The corner segment from point 2 to point 3\n if (outerEnd > 0) {\n const pCenter = rThetaToXY(outerEndAdjustedRadius, outerEndAdjustedAngle, x, y);\n ctx.arc(pCenter.x, pCenter.y, outerEnd, outerEndAdjustedAngle, endAngle + HALF_PI);\n }\n\n // The line from point 3 to point 4\n const p4 = rThetaToXY(innerEndAdjustedRadius, endAngle, x, y);\n ctx.lineTo(p4.x, p4.y);\n\n // The corner segment from point 4 to point 5\n if (innerEnd > 0) {\n const pCenter = rThetaToXY(innerEndAdjustedRadius, innerEndAdjustedAngle, x, y);\n ctx.arc(pCenter.x, pCenter.y, innerEnd, endAngle + HALF_PI, innerEndAdjustedAngle + Math.PI);\n }\n\n // The inner arc from point 5 to point b to point 6\n const innerMidAdjustedAngle = ((endAngle - (innerEnd / innerRadius)) + (startAngle + (innerStart / innerRadius))) / 2;\n ctx.arc(x, y, innerRadius, endAngle - (innerEnd / innerRadius), innerMidAdjustedAngle, true);\n ctx.arc(x, y, innerRadius, innerMidAdjustedAngle, startAngle + (innerStart / innerRadius), true);\n\n // The corner segment from point 6 to point 7\n if (innerStart > 0) {\n const pCenter = rThetaToXY(innerStartAdjustedRadius, innerStartAdjustedAngle, x, y);\n ctx.arc(pCenter.x, pCenter.y, innerStart, innerStartAdjustedAngle + Math.PI, startAngle - HALF_PI);\n }\n\n // The line from point 7 to point 8\n const p8 = rThetaToXY(outerStartAdjustedRadius, startAngle, x, y);\n ctx.lineTo(p8.x, p8.y);\n\n // The corner segment from point 8 to point 1\n if (outerStart > 0) {\n const pCenter = rThetaToXY(outerStartAdjustedRadius, outerStartAdjustedAngle, x, y);\n ctx.arc(pCenter.x, pCenter.y, outerStart, startAngle - HALF_PI, outerStartAdjustedAngle);\n }\n } else {\n ctx.moveTo(x, y);\n\n const outerStartX = Math.cos(outerStartAdjustedAngle) * outerRadius + x;\n const outerStartY = Math.sin(outerStartAdjustedAngle) * outerRadius + y;\n ctx.lineTo(outerStartX, outerStartY);\n\n const outerEndX = Math.cos(outerEndAdjustedAngle) * outerRadius + x;\n const outerEndY = Math.sin(outerEndAdjustedAngle) * outerRadius + y;\n ctx.lineTo(outerEndX, outerEndY);\n }\n\n ctx.closePath();\n}\n\nfunction drawArc(\n ctx: CanvasRenderingContext2D,\n element: ArcElement,\n offset: number,\n spacing: number,\n circular: boolean,\n) {\n const {fullCircles, startAngle, circumference} = element;\n let endAngle = element.endAngle;\n if (fullCircles) {\n pathArc(ctx, element, offset, spacing, endAngle, circular);\n for (let i = 0; i < fullCircles; ++i) {\n ctx.fill();\n }\n if (!isNaN(circumference)) {\n endAngle = startAngle + (circumference % TAU || TAU);\n }\n }\n pathArc(ctx, element, offset, spacing, endAngle, circular);\n ctx.fill();\n return endAngle;\n}\n\nfunction drawBorder(\n ctx: CanvasRenderingContext2D,\n element: ArcElement,\n offset: number,\n spacing: number,\n circular: boolean,\n) {\n const {fullCircles, startAngle, circumference, options} = element;\n const {borderWidth, borderJoinStyle, borderDash, borderDashOffset} = options;\n const inner = options.borderAlign === 'inner';\n\n if (!borderWidth) {\n return;\n }\n\n ctx.setLineDash(borderDash || []);\n ctx.lineDashOffset = borderDashOffset;\n\n if (inner) {\n ctx.lineWidth = borderWidth * 2;\n ctx.lineJoin = borderJoinStyle || 'round';\n } else {\n ctx.lineWidth = borderWidth;\n ctx.lineJoin = borderJoinStyle || 'bevel';\n }\n\n let endAngle = element.endAngle;\n if (fullCircles) {\n pathArc(ctx, element, offset, spacing, endAngle, circular);\n for (let i = 0; i < fullCircles; ++i) {\n ctx.stroke();\n }\n if (!isNaN(circumference)) {\n endAngle = startAngle + (circumference % TAU || TAU);\n }\n }\n\n if (inner) {\n clipArc(ctx, element, endAngle);\n }\n\n if (!fullCircles) {\n pathArc(ctx, element, offset, spacing, endAngle, circular);\n ctx.stroke();\n }\n}\n\nexport interface ArcProps extends Point {\n startAngle: number;\n endAngle: number;\n innerRadius: number;\n outerRadius: number;\n circumference: number;\n}\n\nexport default class ArcElement extends Element {\n\n static id = 'arc';\n\n static defaults = {\n borderAlign: 'center',\n borderColor: '#fff',\n borderDash: [],\n borderDashOffset: 0,\n borderJoinStyle: undefined,\n borderRadius: 0,\n borderWidth: 2,\n offset: 0,\n spacing: 0,\n angle: undefined,\n circular: true,\n };\n\n static defaultRoutes = {\n backgroundColor: 'backgroundColor'\n };\n\n static descriptors = {\n _scriptable: true,\n _indexable: (name) => name !== 'borderDash'\n };\n\n circumference: number;\n endAngle: number;\n fullCircles: number;\n innerRadius: number;\n outerRadius: number;\n pixelMargin: number;\n startAngle: number;\n\n constructor(cfg) {\n super();\n\n this.options = undefined;\n this.circumference = undefined;\n this.startAngle = undefined;\n this.endAngle = undefined;\n this.innerRadius = undefined;\n this.outerRadius = undefined;\n this.pixelMargin = 0;\n this.fullCircles = 0;\n\n if (cfg) {\n Object.assign(this, cfg);\n }\n }\n\n inRange(chartX: number, chartY: number, useFinalPosition: boolean) {\n const point = this.getProps(['x', 'y'], useFinalPosition);\n const {angle, distance} = getAngleFromPoint(point, {x: chartX, y: chartY});\n const {startAngle, endAngle, innerRadius, outerRadius, circumference} = this.getProps([\n 'startAngle',\n 'endAngle',\n 'innerRadius',\n 'outerRadius',\n 'circumference'\n ], useFinalPosition);\n const rAdjust = (this.options.spacing + this.options.borderWidth) / 2;\n const _circumference = valueOrDefault(circumference, endAngle - startAngle);\n const betweenAngles = _circumference >= TAU || _angleBetween(angle, startAngle, endAngle);\n const withinRadius = _isBetween(distance, innerRadius + rAdjust, outerRadius + rAdjust);\n\n return (betweenAngles && withinRadius);\n }\n\n getCenterPoint(useFinalPosition: boolean) {\n const {x, y, startAngle, endAngle, innerRadius, outerRadius} = this.getProps([\n 'x',\n 'y',\n 'startAngle',\n 'endAngle',\n 'innerRadius',\n 'outerRadius'\n ], useFinalPosition);\n const {offset, spacing} = this.options;\n const halfAngle = (startAngle + endAngle) / 2;\n const halfRadius = (innerRadius + outerRadius + spacing + offset) / 2;\n return {\n x: x + Math.cos(halfAngle) * halfRadius,\n y: y + Math.sin(halfAngle) * halfRadius\n };\n }\n\n tooltipPosition(useFinalPosition: boolean) {\n return this.getCenterPoint(useFinalPosition);\n }\n\n draw(ctx: CanvasRenderingContext2D) {\n const {options, circumference} = this;\n const offset = (options.offset || 0) / 4;\n const spacing = (options.spacing || 0) / 2;\n const circular = options.circular;\n this.pixelMargin = (options.borderAlign === 'inner') ? 0.33 : 0;\n this.fullCircles = circumference > TAU ? Math.floor(circumference / TAU) : 0;\n\n if (circumference === 0 || this.innerRadius < 0 || this.outerRadius < 0) {\n return;\n }\n\n ctx.save();\n\n const halfAngle = (this.startAngle + this.endAngle) / 2;\n ctx.translate(Math.cos(halfAngle) * offset, Math.sin(halfAngle) * offset);\n const fix = 1 - Math.sin(Math.min(PI, circumference || 0));\n const radiusOffset = offset * fix;\n\n ctx.fillStyle = options.backgroundColor;\n ctx.strokeStyle = options.borderColor;\n\n drawArc(ctx, this, radiusOffset, spacing, circular);\n drawBorder(ctx, this, radiusOffset, spacing, circular);\n\n ctx.restore();\n }\n}\n","import Element from '../core/core.element.js';\nimport {_bezierInterpolation, _pointInLine, _steppedInterpolation} from '../helpers/helpers.interpolation.js';\nimport {_computeSegments, _boundSegments} from '../helpers/helpers.segment.js';\nimport {_steppedLineTo, _bezierCurveTo} from '../helpers/helpers.canvas.js';\nimport {_updateBezierControlPoints} from '../helpers/helpers.curve.js';\nimport {valueOrDefault} from '../helpers/index.js';\n\n/**\n * @typedef { import('./element.point.js').default } PointElement\n */\n\nfunction setStyle(ctx, options, style = options) {\n ctx.lineCap = valueOrDefault(style.borderCapStyle, options.borderCapStyle);\n ctx.setLineDash(valueOrDefault(style.borderDash, options.borderDash));\n ctx.lineDashOffset = valueOrDefault(style.borderDashOffset, options.borderDashOffset);\n ctx.lineJoin = valueOrDefault(style.borderJoinStyle, options.borderJoinStyle);\n ctx.lineWidth = valueOrDefault(style.borderWidth, options.borderWidth);\n ctx.strokeStyle = valueOrDefault(style.borderColor, options.borderColor);\n}\n\nfunction lineTo(ctx, previous, target) {\n ctx.lineTo(target.x, target.y);\n}\n\n/**\n * @returns {any}\n */\nfunction getLineMethod(options) {\n if (options.stepped) {\n return _steppedLineTo;\n }\n\n if (options.tension || options.cubicInterpolationMode === 'monotone') {\n return _bezierCurveTo;\n }\n\n return lineTo;\n}\n\nfunction pathVars(points, segment, params = {}) {\n const count = points.length;\n const {start: paramsStart = 0, end: paramsEnd = count - 1} = params;\n const {start: segmentStart, end: segmentEnd} = segment;\n const start = Math.max(paramsStart, segmentStart);\n const end = Math.min(paramsEnd, segmentEnd);\n const outside = paramsStart < segmentStart && paramsEnd < segmentStart || paramsStart > segmentEnd && paramsEnd > segmentEnd;\n\n return {\n count,\n start,\n loop: segment.loop,\n ilen: end < start && !outside ? count + end - start : end - start\n };\n}\n\n/**\n * Create path from points, grouping by truncated x-coordinate\n * Points need to be in order by x-coordinate for this to work efficiently\n * @param {CanvasRenderingContext2D|Path2D} ctx - Context\n * @param {LineElement} line\n * @param {object} segment\n * @param {number} segment.start - start index of the segment, referring the points array\n * @param {number} segment.end - end index of the segment, referring the points array\n * @param {boolean} segment.loop - indicates that the segment is a loop\n * @param {object} params\n * @param {boolean} params.move - move to starting point (vs line to it)\n * @param {boolean} params.reverse - path the segment from end to start\n * @param {number} params.start - limit segment to points starting from `start` index\n * @param {number} params.end - limit segment to points ending at `start` + `count` index\n */\nfunction pathSegment(ctx, line, segment, params) {\n const {points, options} = line;\n const {count, start, loop, ilen} = pathVars(points, segment, params);\n const lineMethod = getLineMethod(options);\n // eslint-disable-next-line prefer-const\n let {move = true, reverse} = params || {};\n let i, point, prev;\n\n for (i = 0; i <= ilen; ++i) {\n point = points[(start + (reverse ? ilen - i : i)) % count];\n\n if (point.skip) {\n // If there is a skipped point inside a segment, spanGaps must be true\n continue;\n } else if (move) {\n ctx.moveTo(point.x, point.y);\n move = false;\n } else {\n lineMethod(ctx, prev, point, reverse, options.stepped);\n }\n\n prev = point;\n }\n\n if (loop) {\n point = points[(start + (reverse ? ilen : 0)) % count];\n lineMethod(ctx, prev, point, reverse, options.stepped);\n }\n\n return !!loop;\n}\n\n/**\n * Create path from points, grouping by truncated x-coordinate\n * Points need to be in order by x-coordinate for this to work efficiently\n * @param {CanvasRenderingContext2D|Path2D} ctx - Context\n * @param {LineElement} line\n * @param {object} segment\n * @param {number} segment.start - start index of the segment, referring the points array\n * @param {number} segment.end - end index of the segment, referring the points array\n * @param {boolean} segment.loop - indicates that the segment is a loop\n * @param {object} params\n * @param {boolean} params.move - move to starting point (vs line to it)\n * @param {boolean} params.reverse - path the segment from end to start\n * @param {number} params.start - limit segment to points starting from `start` index\n * @param {number} params.end - limit segment to points ending at `start` + `count` index\n */\nfunction fastPathSegment(ctx, line, segment, params) {\n const points = line.points;\n const {count, start, ilen} = pathVars(points, segment, params);\n const {move = true, reverse} = params || {};\n let avgX = 0;\n let countX = 0;\n let i, point, prevX, minY, maxY, lastY;\n\n const pointIndex = (index) => (start + (reverse ? ilen - index : index)) % count;\n const drawX = () => {\n if (minY !== maxY) {\n // Draw line to maxY and minY, using the average x-coordinate\n ctx.lineTo(avgX, maxY);\n ctx.lineTo(avgX, minY);\n // Line to y-value of last point in group. So the line continues\n // from correct position. Not using move, to have solid path.\n ctx.lineTo(avgX, lastY);\n }\n };\n\n if (move) {\n point = points[pointIndex(0)];\n ctx.moveTo(point.x, point.y);\n }\n\n for (i = 0; i <= ilen; ++i) {\n point = points[pointIndex(i)];\n\n if (point.skip) {\n // If there is a skipped point inside a segment, spanGaps must be true\n continue;\n }\n\n const x = point.x;\n const y = point.y;\n const truncX = x | 0; // truncated x-coordinate\n\n if (truncX === prevX) {\n // Determine `minY` / `maxY` and `avgX` while we stay within same x-position\n if (y < minY) {\n minY = y;\n } else if (y > maxY) {\n maxY = y;\n }\n // For first point in group, countX is `0`, so average will be `x` / 1.\n avgX = (countX * avgX + x) / ++countX;\n } else {\n drawX();\n // Draw line to next x-position, using the first (or only)\n // y-value in that group\n ctx.lineTo(x, y);\n\n prevX = truncX;\n countX = 0;\n minY = maxY = y;\n }\n // Keep track of the last y-value in group\n lastY = y;\n }\n drawX();\n}\n\n/**\n * @param {LineElement} line - the line\n * @returns {function}\n * @private\n */\nfunction _getSegmentMethod(line) {\n const opts = line.options;\n const borderDash = opts.borderDash && opts.borderDash.length;\n const useFastPath = !line._decimated && !line._loop && !opts.tension && opts.cubicInterpolationMode !== 'monotone' && !opts.stepped && !borderDash;\n return useFastPath ? fastPathSegment : pathSegment;\n}\n\n/**\n * @private\n */\nfunction _getInterpolationMethod(options) {\n if (options.stepped) {\n return _steppedInterpolation;\n }\n\n if (options.tension || options.cubicInterpolationMode === 'monotone') {\n return _bezierInterpolation;\n }\n\n return _pointInLine;\n}\n\nfunction strokePathWithCache(ctx, line, start, count) {\n let path = line._path;\n if (!path) {\n path = line._path = new Path2D();\n if (line.path(path, start, count)) {\n path.closePath();\n }\n }\n setStyle(ctx, line.options);\n ctx.stroke(path);\n}\n\nfunction strokePathDirect(ctx, line, start, count) {\n const {segments, options} = line;\n const segmentMethod = _getSegmentMethod(line);\n\n for (const segment of segments) {\n setStyle(ctx, options, segment.style);\n ctx.beginPath();\n if (segmentMethod(ctx, line, segment, {start, end: start + count - 1})) {\n ctx.closePath();\n }\n ctx.stroke();\n }\n}\n\nconst usePath2D = typeof Path2D === 'function';\n\nfunction draw(ctx, line, start, count) {\n if (usePath2D && !line.options.segment) {\n strokePathWithCache(ctx, line, start, count);\n } else {\n strokePathDirect(ctx, line, start, count);\n }\n}\n\nexport default class LineElement extends Element {\n\n static id = 'line';\n\n /**\n * @type {any}\n */\n static defaults = {\n borderCapStyle: 'butt',\n borderDash: [],\n borderDashOffset: 0,\n borderJoinStyle: 'miter',\n borderWidth: 3,\n capBezierPoints: true,\n cubicInterpolationMode: 'default',\n fill: false,\n spanGaps: false,\n stepped: false,\n tension: 0,\n };\n\n /**\n * @type {any}\n */\n static defaultRoutes = {\n backgroundColor: 'backgroundColor',\n borderColor: 'borderColor'\n };\n\n\n static descriptors = {\n _scriptable: true,\n _indexable: (name) => name !== 'borderDash' && name !== 'fill',\n };\n\n\n constructor(cfg) {\n super();\n\n this.animated = true;\n this.options = undefined;\n this._chart = undefined;\n this._loop = undefined;\n this._fullLoop = undefined;\n this._path = undefined;\n this._points = undefined;\n this._segments = undefined;\n this._decimated = false;\n this._pointsUpdated = false;\n this._datasetIndex = undefined;\n\n if (cfg) {\n Object.assign(this, cfg);\n }\n }\n\n updateControlPoints(chartArea, indexAxis) {\n const options = this.options;\n if ((options.tension || options.cubicInterpolationMode === 'monotone') && !options.stepped && !this._pointsUpdated) {\n const loop = options.spanGaps ? this._loop : this._fullLoop;\n _updateBezierControlPoints(this._points, options, chartArea, loop, indexAxis);\n this._pointsUpdated = true;\n }\n }\n\n set points(points) {\n this._points = points;\n delete this._segments;\n delete this._path;\n this._pointsUpdated = false;\n }\n\n get points() {\n return this._points;\n }\n\n get segments() {\n return this._segments || (this._segments = _computeSegments(this, this.options.segment));\n }\n\n /**\n\t * First non-skipped point on this line\n\t * @returns {PointElement|undefined}\n\t */\n first() {\n const segments = this.segments;\n const points = this.points;\n return segments.length && points[segments[0].start];\n }\n\n /**\n\t * Last non-skipped point on this line\n\t * @returns {PointElement|undefined}\n\t */\n last() {\n const segments = this.segments;\n const points = this.points;\n const count = segments.length;\n return count && points[segments[count - 1].end];\n }\n\n /**\n\t * Interpolate a point in this line at the same value on `property` as\n\t * the reference `point` provided\n\t * @param {PointElement} point - the reference point\n\t * @param {string} property - the property to match on\n\t * @returns {PointElement|undefined}\n\t */\n interpolate(point, property) {\n const options = this.options;\n const value = point[property];\n const points = this.points;\n const segments = _boundSegments(this, {property, start: value, end: value});\n\n if (!segments.length) {\n return;\n }\n\n const result = [];\n const _interpolate = _getInterpolationMethod(options);\n let i, ilen;\n for (i = 0, ilen = segments.length; i < ilen; ++i) {\n const {start, end} = segments[i];\n const p1 = points[start];\n const p2 = points[end];\n if (p1 === p2) {\n result.push(p1);\n continue;\n }\n const t = Math.abs((value - p1[property]) / (p2[property] - p1[property]));\n const interpolated = _interpolate(p1, p2, t, options.stepped);\n interpolated[property] = point[property];\n result.push(interpolated);\n }\n return result.length === 1 ? result[0] : result;\n }\n\n /**\n\t * Append a segment of this line to current path.\n\t * @param {CanvasRenderingContext2D} ctx\n\t * @param {object} segment\n\t * @param {number} segment.start - start index of the segment, referring the points array\n \t * @param {number} segment.end - end index of the segment, referring the points array\n \t * @param {boolean} segment.loop - indicates that the segment is a loop\n\t * @param {object} params\n\t * @param {boolean} params.move - move to starting point (vs line to it)\n\t * @param {boolean} params.reverse - path the segment from end to start\n\t * @param {number} params.start - limit segment to points starting from `start` index\n\t * @param {number} params.end - limit segment to points ending at `start` + `count` index\n\t * @returns {undefined|boolean} - true if the segment is a full loop (path should be closed)\n\t */\n pathSegment(ctx, segment, params) {\n const segmentMethod = _getSegmentMethod(this);\n return segmentMethod(ctx, this, segment, params);\n }\n\n /**\n\t * Append all segments of this line to current path.\n\t * @param {CanvasRenderingContext2D|Path2D} ctx\n\t * @param {number} [start]\n\t * @param {number} [count]\n\t * @returns {undefined|boolean} - true if line is a full loop (path should be closed)\n\t */\n path(ctx, start, count) {\n const segments = this.segments;\n const segmentMethod = _getSegmentMethod(this);\n let loop = this._loop;\n\n start = start || 0;\n count = count || (this.points.length - start);\n\n for (const segment of segments) {\n loop &= segmentMethod(ctx, this, segment, {start, end: start + count - 1});\n }\n return !!loop;\n }\n\n /**\n\t * Draw\n\t * @param {CanvasRenderingContext2D} ctx\n\t * @param {object} chartArea\n\t * @param {number} [start]\n\t * @param {number} [count]\n\t */\n draw(ctx, chartArea, start, count) {\n const options = this.options || {};\n const points = this.points || [];\n\n if (points.length && options.borderWidth) {\n ctx.save();\n\n draw(ctx, this, start, count);\n\n ctx.restore();\n }\n\n if (this.animated) {\n // When line is animated, the control points and path are not cached.\n this._pointsUpdated = false;\n this._path = undefined;\n }\n }\n}\n","import Element from '../core/core.element.js';\nimport {drawPoint, _isPointInArea} from '../helpers/helpers.canvas.js';\nimport type {\n CartesianParsedData,\n ChartArea,\n Point,\n PointHoverOptions,\n PointOptions,\n} from '../types/index.js';\n\nfunction inRange(el: PointElement, pos: number, axis: 'x' | 'y', useFinalPosition?: boolean) {\n const options = el.options;\n const {[axis]: value} = el.getProps([axis], useFinalPosition);\n\n return (Math.abs(pos - value) < options.radius + options.hitRadius);\n}\n\nexport type PointProps = Point\n\nexport default class PointElement extends Element {\n\n static id = 'point';\n\n parsed: CartesianParsedData;\n skip?: boolean;\n stop?: boolean;\n\n /**\n * @type {any}\n */\n static defaults = {\n borderWidth: 1,\n hitRadius: 1,\n hoverBorderWidth: 1,\n hoverRadius: 4,\n pointStyle: 'circle',\n radius: 3,\n rotation: 0\n };\n\n /**\n * @type {any}\n */\n static defaultRoutes = {\n backgroundColor: 'backgroundColor',\n borderColor: 'borderColor'\n };\n\n constructor(cfg) {\n super();\n\n this.options = undefined;\n this.parsed = undefined;\n this.skip = undefined;\n this.stop = undefined;\n\n if (cfg) {\n Object.assign(this, cfg);\n }\n }\n\n inRange(mouseX: number, mouseY: number, useFinalPosition?: boolean) {\n const options = this.options;\n const {x, y} = this.getProps(['x', 'y'], useFinalPosition);\n return ((Math.pow(mouseX - x, 2) + Math.pow(mouseY - y, 2)) < Math.pow(options.hitRadius + options.radius, 2));\n }\n\n inXRange(mouseX: number, useFinalPosition?: boolean) {\n return inRange(this, mouseX, 'x', useFinalPosition);\n }\n\n inYRange(mouseY: number, useFinalPosition?: boolean) {\n return inRange(this, mouseY, 'y', useFinalPosition);\n }\n\n getCenterPoint(useFinalPosition?: boolean) {\n const {x, y} = this.getProps(['x', 'y'], useFinalPosition);\n return {x, y};\n }\n\n size(options?: Partial) {\n options = options || this.options || {};\n let radius = options.radius || 0;\n radius = Math.max(radius, radius && options.hoverRadius || 0);\n const borderWidth = radius && options.borderWidth || 0;\n return (radius + borderWidth) * 2;\n }\n\n draw(ctx: CanvasRenderingContext2D, area: ChartArea) {\n const options = this.options;\n\n if (this.skip || options.radius < 0.1 || !_isPointInArea(this, area, this.size(options) / 2)) {\n return;\n }\n\n ctx.strokeStyle = options.borderColor;\n ctx.lineWidth = options.borderWidth;\n ctx.fillStyle = options.backgroundColor;\n drawPoint(ctx, options, this.x, this.y);\n }\n\n getRange() {\n const options = this.options || {};\n // @ts-expect-error Fallbacks should never be hit in practice\n return options.radius + options.hitRadius;\n }\n}\n","import Element from '../core/core.element.js';\nimport {isObject, _isBetween, _limitValue} from '../helpers/index.js';\nimport {addRoundedRectPath} from '../helpers/helpers.canvas.js';\nimport {toTRBL, toTRBLCorners} from '../helpers/helpers.options.js';\n\n/** @typedef {{ x: number, y: number, base: number, horizontal: boolean, width: number, height: number }} BarProps */\n\n/**\n * Helper function to get the bounds of the bar regardless of the orientation\n * @param {BarElement} bar the bar\n * @param {boolean} [useFinalPosition]\n * @return {object} bounds of the bar\n * @private\n */\nfunction getBarBounds(bar, useFinalPosition) {\n const {x, y, base, width, height} = /** @type {BarProps} */ (bar.getProps(['x', 'y', 'base', 'width', 'height'], useFinalPosition));\n\n let left, right, top, bottom, half;\n\n if (bar.horizontal) {\n half = height / 2;\n left = Math.min(x, base);\n right = Math.max(x, base);\n top = y - half;\n bottom = y + half;\n } else {\n half = width / 2;\n left = x - half;\n right = x + half;\n top = Math.min(y, base);\n bottom = Math.max(y, base);\n }\n\n return {left, top, right, bottom};\n}\n\nfunction skipOrLimit(skip, value, min, max) {\n return skip ? 0 : _limitValue(value, min, max);\n}\n\nfunction parseBorderWidth(bar, maxW, maxH) {\n const value = bar.options.borderWidth;\n const skip = bar.borderSkipped;\n const o = toTRBL(value);\n\n return {\n t: skipOrLimit(skip.top, o.top, 0, maxH),\n r: skipOrLimit(skip.right, o.right, 0, maxW),\n b: skipOrLimit(skip.bottom, o.bottom, 0, maxH),\n l: skipOrLimit(skip.left, o.left, 0, maxW)\n };\n}\n\nfunction parseBorderRadius(bar, maxW, maxH) {\n const {enableBorderRadius} = bar.getProps(['enableBorderRadius']);\n const value = bar.options.borderRadius;\n const o = toTRBLCorners(value);\n const maxR = Math.min(maxW, maxH);\n const skip = bar.borderSkipped;\n\n // If the value is an object, assume the user knows what they are doing\n // and apply as directed.\n const enableBorder = enableBorderRadius || isObject(value);\n\n return {\n topLeft: skipOrLimit(!enableBorder || skip.top || skip.left, o.topLeft, 0, maxR),\n topRight: skipOrLimit(!enableBorder || skip.top || skip.right, o.topRight, 0, maxR),\n bottomLeft: skipOrLimit(!enableBorder || skip.bottom || skip.left, o.bottomLeft, 0, maxR),\n bottomRight: skipOrLimit(!enableBorder || skip.bottom || skip.right, o.bottomRight, 0, maxR)\n };\n}\n\nfunction boundingRects(bar) {\n const bounds = getBarBounds(bar);\n const width = bounds.right - bounds.left;\n const height = bounds.bottom - bounds.top;\n const border = parseBorderWidth(bar, width / 2, height / 2);\n const radius = parseBorderRadius(bar, width / 2, height / 2);\n\n return {\n outer: {\n x: bounds.left,\n y: bounds.top,\n w: width,\n h: height,\n radius\n },\n inner: {\n x: bounds.left + border.l,\n y: bounds.top + border.t,\n w: width - border.l - border.r,\n h: height - border.t - border.b,\n radius: {\n topLeft: Math.max(0, radius.topLeft - Math.max(border.t, border.l)),\n topRight: Math.max(0, radius.topRight - Math.max(border.t, border.r)),\n bottomLeft: Math.max(0, radius.bottomLeft - Math.max(border.b, border.l)),\n bottomRight: Math.max(0, radius.bottomRight - Math.max(border.b, border.r)),\n }\n }\n };\n}\n\nfunction inRange(bar, x, y, useFinalPosition) {\n const skipX = x === null;\n const skipY = y === null;\n const skipBoth = skipX && skipY;\n const bounds = bar && !skipBoth && getBarBounds(bar, useFinalPosition);\n\n return bounds\n\t\t&& (skipX || _isBetween(x, bounds.left, bounds.right))\n\t\t&& (skipY || _isBetween(y, bounds.top, bounds.bottom));\n}\n\nfunction hasRadius(radius) {\n return radius.topLeft || radius.topRight || radius.bottomLeft || radius.bottomRight;\n}\n\n/**\n * Add a path of a rectangle to the current sub-path\n * @param {CanvasRenderingContext2D} ctx Context\n * @param {*} rect Bounding rect\n */\nfunction addNormalRectPath(ctx, rect) {\n ctx.rect(rect.x, rect.y, rect.w, rect.h);\n}\n\nfunction inflateRect(rect, amount, refRect = {}) {\n const x = rect.x !== refRect.x ? -amount : 0;\n const y = rect.y !== refRect.y ? -amount : 0;\n const w = (rect.x + rect.w !== refRect.x + refRect.w ? amount : 0) - x;\n const h = (rect.y + rect.h !== refRect.y + refRect.h ? amount : 0) - y;\n return {\n x: rect.x + x,\n y: rect.y + y,\n w: rect.w + w,\n h: rect.h + h,\n radius: rect.radius\n };\n}\n\nexport default class BarElement extends Element {\n\n static id = 'bar';\n\n /**\n * @type {any}\n */\n static defaults = {\n borderSkipped: 'start',\n borderWidth: 0,\n borderRadius: 0,\n inflateAmount: 'auto',\n pointStyle: undefined\n };\n\n /**\n * @type {any}\n */\n static defaultRoutes = {\n backgroundColor: 'backgroundColor',\n borderColor: 'borderColor'\n };\n\n constructor(cfg) {\n super();\n\n this.options = undefined;\n this.horizontal = undefined;\n this.base = undefined;\n this.width = undefined;\n this.height = undefined;\n this.inflateAmount = undefined;\n\n if (cfg) {\n Object.assign(this, cfg);\n }\n }\n\n draw(ctx) {\n const {inflateAmount, options: {borderColor, backgroundColor}} = this;\n const {inner, outer} = boundingRects(this);\n const addRectPath = hasRadius(outer.radius) ? addRoundedRectPath : addNormalRectPath;\n\n ctx.save();\n\n if (outer.w !== inner.w || outer.h !== inner.h) {\n ctx.beginPath();\n addRectPath(ctx, inflateRect(outer, inflateAmount, inner));\n ctx.clip();\n addRectPath(ctx, inflateRect(inner, -inflateAmount, outer));\n ctx.fillStyle = borderColor;\n ctx.fill('evenodd');\n }\n\n ctx.beginPath();\n addRectPath(ctx, inflateRect(inner, inflateAmount));\n ctx.fillStyle = backgroundColor;\n ctx.fill();\n\n ctx.restore();\n }\n\n inRange(mouseX, mouseY, useFinalPosition) {\n return inRange(this, mouseX, mouseY, useFinalPosition);\n }\n\n inXRange(mouseX, useFinalPosition) {\n return inRange(this, mouseX, null, useFinalPosition);\n }\n\n inYRange(mouseY, useFinalPosition) {\n return inRange(this, null, mouseY, useFinalPosition);\n }\n\n getCenterPoint(useFinalPosition) {\n const {x, y, base, horizontal} = /** @type {BarProps} */ (this.getProps(['x', 'y', 'base', 'horizontal'], useFinalPosition));\n return {\n x: horizontal ? (x + base) / 2 : x,\n y: horizontal ? y : (y + base) / 2\n };\n }\n\n getRange(axis) {\n return axis === 'x' ? this.width / 2 : this.height / 2;\n }\n}\n","import {DoughnutController, PolarAreaController} from '../index.js';\nimport type {Chart, ChartDataset} from '../types.js';\n\nexport interface ColorsPluginOptions {\n enabled?: boolean;\n forceOverride?: boolean;\n}\n\ninterface ColorsDescriptor {\n backgroundColor?: unknown;\n borderColor?: unknown;\n}\n\nconst BORDER_COLORS = [\n 'rgb(54, 162, 235)', // blue\n 'rgb(255, 99, 132)', // red\n 'rgb(255, 159, 64)', // orange\n 'rgb(255, 205, 86)', // yellow\n 'rgb(75, 192, 192)', // green\n 'rgb(153, 102, 255)', // purple\n 'rgb(201, 203, 207)' // grey\n];\n\n// Border colors with 50% transparency\nconst BACKGROUND_COLORS = /* #__PURE__ */ BORDER_COLORS.map(color => color.replace('rgb(', 'rgba(').replace(')', ', 0.5)'));\n\nfunction getBorderColor(i: number) {\n return BORDER_COLORS[i % BORDER_COLORS.length];\n}\n\nfunction getBackgroundColor(i: number) {\n return BACKGROUND_COLORS[i % BACKGROUND_COLORS.length];\n}\n\nfunction colorizeDefaultDataset(dataset: ChartDataset, i: number) {\n dataset.borderColor = getBorderColor(i);\n dataset.backgroundColor = getBackgroundColor(i);\n\n return ++i;\n}\n\nfunction colorizeDoughnutDataset(dataset: ChartDataset, i: number) {\n dataset.backgroundColor = dataset.data.map(() => getBorderColor(i++));\n\n return i;\n}\n\nfunction colorizePolarAreaDataset(dataset: ChartDataset, i: number) {\n dataset.backgroundColor = dataset.data.map(() => getBackgroundColor(i++));\n\n return i;\n}\n\nfunction getColorizer(chart: Chart) {\n let i = 0;\n\n return (dataset: ChartDataset, datasetIndex: number) => {\n const controller = chart.getDatasetMeta(datasetIndex).controller;\n\n if (controller instanceof DoughnutController) {\n i = colorizeDoughnutDataset(dataset, i);\n } else if (controller instanceof PolarAreaController) {\n i = colorizePolarAreaDataset(dataset, i);\n } else if (controller) {\n i = colorizeDefaultDataset(dataset, i);\n }\n };\n}\n\nfunction containsColorsDefinitions(\n descriptors: ColorsDescriptor[] | Record\n) {\n let k: number | string;\n\n for (k in descriptors) {\n if (descriptors[k].borderColor || descriptors[k].backgroundColor) {\n return true;\n }\n }\n\n return false;\n}\n\nfunction containsColorsDefinition(\n descriptor: ColorsDescriptor\n) {\n return descriptor && (descriptor.borderColor || descriptor.backgroundColor);\n}\n\nexport default {\n id: 'colors',\n\n defaults: {\n enabled: true,\n forceOverride: false\n } as ColorsPluginOptions,\n\n beforeLayout(chart: Chart, _args, options: ColorsPluginOptions) {\n if (!options.enabled) {\n return;\n }\n\n const {\n data: {datasets},\n options: chartOptions\n } = chart.config;\n const {elements} = chartOptions;\n\n if (!options.forceOverride && (containsColorsDefinitions(datasets) || containsColorsDefinition(chartOptions) || (elements && containsColorsDefinitions(elements)))) {\n return;\n }\n\n const colorizer = getColorizer(chart);\n\n datasets.forEach(colorizer);\n }\n};\n","import {_limitValue, _lookupByKey, isNullOrUndef, resolve} from '../helpers/index.js';\n\nfunction lttbDecimation(data, start, count, availableWidth, options) {\n /**\n * Implementation of the Largest Triangle Three Buckets algorithm.\n *\n * This implementation is based on the original implementation by Sveinn Steinarsson\n * in https://github.com/sveinn-steinarsson/flot-downsample/blob/master/jquery.flot.downsample.js\n *\n * The original implementation is MIT licensed.\n */\n const samples = options.samples || availableWidth;\n // There are less points than the threshold, returning the whole array\n if (samples >= count) {\n return data.slice(start, start + count);\n }\n\n const decimated = [];\n\n const bucketWidth = (count - 2) / (samples - 2);\n let sampledIndex = 0;\n const endIndex = start + count - 1;\n // Starting from offset\n let a = start;\n let i, maxAreaPoint, maxArea, area, nextA;\n\n decimated[sampledIndex++] = data[a];\n\n for (i = 0; i < samples - 2; i++) {\n let avgX = 0;\n let avgY = 0;\n let j;\n\n // Adding offset\n const avgRangeStart = Math.floor((i + 1) * bucketWidth) + 1 + start;\n const avgRangeEnd = Math.min(Math.floor((i + 2) * bucketWidth) + 1, count) + start;\n const avgRangeLength = avgRangeEnd - avgRangeStart;\n\n for (j = avgRangeStart; j < avgRangeEnd; j++) {\n avgX += data[j].x;\n avgY += data[j].y;\n }\n\n avgX /= avgRangeLength;\n avgY /= avgRangeLength;\n\n // Adding offset\n const rangeOffs = Math.floor(i * bucketWidth) + 1 + start;\n const rangeTo = Math.min(Math.floor((i + 1) * bucketWidth) + 1, count) + start;\n const {x: pointAx, y: pointAy} = data[a];\n\n // Note that this is changed from the original algorithm which initializes these\n // values to 1. The reason for this change is that if the area is small, nextA\n // would never be set and thus a crash would occur in the next loop as `a` would become\n // `undefined`. Since the area is always positive, but could be 0 in the case of a flat trace,\n // initializing with a negative number is the correct solution.\n maxArea = area = -1;\n\n for (j = rangeOffs; j < rangeTo; j++) {\n area = 0.5 * Math.abs(\n (pointAx - avgX) * (data[j].y - pointAy) -\n (pointAx - data[j].x) * (avgY - pointAy)\n );\n\n if (area > maxArea) {\n maxArea = area;\n maxAreaPoint = data[j];\n nextA = j;\n }\n }\n\n decimated[sampledIndex++] = maxAreaPoint;\n a = nextA;\n }\n\n // Include the last point\n decimated[sampledIndex++] = data[endIndex];\n\n return decimated;\n}\n\nfunction minMaxDecimation(data, start, count, availableWidth) {\n let avgX = 0;\n let countX = 0;\n let i, point, x, y, prevX, minIndex, maxIndex, startIndex, minY, maxY;\n const decimated = [];\n const endIndex = start + count - 1;\n\n const xMin = data[start].x;\n const xMax = data[endIndex].x;\n const dx = xMax - xMin;\n\n for (i = start; i < start + count; ++i) {\n point = data[i];\n x = (point.x - xMin) / dx * availableWidth;\n y = point.y;\n const truncX = x | 0;\n\n if (truncX === prevX) {\n // Determine `minY` / `maxY` and `avgX` while we stay within same x-position\n if (y < minY) {\n minY = y;\n minIndex = i;\n } else if (y > maxY) {\n maxY = y;\n maxIndex = i;\n }\n // For first point in group, countX is `0`, so average will be `x` / 1.\n // Use point.x here because we're computing the average data `x` value\n avgX = (countX * avgX + point.x) / ++countX;\n } else {\n // Push up to 4 points, 3 for the last interval and the first point for this interval\n const lastIndex = i - 1;\n\n if (!isNullOrUndef(minIndex) && !isNullOrUndef(maxIndex)) {\n // The interval is defined by 4 points: start, min, max, end.\n // The starting point is already considered at this point, so we need to determine which\n // of the other points to add. We need to sort these points to ensure the decimated data\n // is still sorted and then ensure there are no duplicates.\n const intermediateIndex1 = Math.min(minIndex, maxIndex);\n const intermediateIndex2 = Math.max(minIndex, maxIndex);\n\n if (intermediateIndex1 !== startIndex && intermediateIndex1 !== lastIndex) {\n decimated.push({\n ...data[intermediateIndex1],\n x: avgX,\n });\n }\n if (intermediateIndex2 !== startIndex && intermediateIndex2 !== lastIndex) {\n decimated.push({\n ...data[intermediateIndex2],\n x: avgX\n });\n }\n }\n\n // lastIndex === startIndex will occur when a range has only 1 point which could\n // happen with very uneven data\n if (i > 0 && lastIndex !== startIndex) {\n // Last point in the previous interval\n decimated.push(data[lastIndex]);\n }\n\n // Start of the new interval\n decimated.push(point);\n prevX = truncX;\n countX = 0;\n minY = maxY = y;\n minIndex = maxIndex = startIndex = i;\n }\n }\n\n return decimated;\n}\n\nfunction cleanDecimatedDataset(dataset) {\n if (dataset._decimated) {\n const data = dataset._data;\n delete dataset._decimated;\n delete dataset._data;\n Object.defineProperty(dataset, 'data', {\n configurable: true,\n enumerable: true,\n writable: true,\n value: data,\n });\n }\n}\n\nfunction cleanDecimatedData(chart) {\n chart.data.datasets.forEach((dataset) => {\n cleanDecimatedDataset(dataset);\n });\n}\n\nfunction getStartAndCountOfVisiblePointsSimplified(meta, points) {\n const pointCount = points.length;\n\n let start = 0;\n let count;\n\n const {iScale} = meta;\n const {min, max, minDefined, maxDefined} = iScale.getUserBounds();\n\n if (minDefined) {\n start = _limitValue(_lookupByKey(points, iScale.axis, min).lo, 0, pointCount - 1);\n }\n if (maxDefined) {\n count = _limitValue(_lookupByKey(points, iScale.axis, max).hi + 1, start, pointCount) - start;\n } else {\n count = pointCount - start;\n }\n\n return {start, count};\n}\n\nexport default {\n id: 'decimation',\n\n defaults: {\n algorithm: 'min-max',\n enabled: false,\n },\n\n beforeElementsUpdate: (chart, args, options) => {\n if (!options.enabled) {\n // The decimation plugin may have been previously enabled. Need to remove old `dataset._data` handlers\n cleanDecimatedData(chart);\n return;\n }\n\n // Assume the entire chart is available to show a few more points than needed\n const availableWidth = chart.width;\n\n chart.data.datasets.forEach((dataset, datasetIndex) => {\n const {_data, indexAxis} = dataset;\n const meta = chart.getDatasetMeta(datasetIndex);\n const data = _data || dataset.data;\n\n if (resolve([indexAxis, chart.options.indexAxis]) === 'y') {\n // Decimation is only supported for lines that have an X indexAxis\n return;\n }\n\n if (!meta.controller.supportsDecimation) {\n // Only line datasets are supported\n return;\n }\n\n const xAxis = chart.scales[meta.xAxisID];\n if (xAxis.type !== 'linear' && xAxis.type !== 'time') {\n // Only linear interpolation is supported\n return;\n }\n\n if (chart.options.parsing) {\n // Plugin only supports data that does not need parsing\n return;\n }\n\n let {start, count} = getStartAndCountOfVisiblePointsSimplified(meta, data);\n const threshold = options.threshold || 4 * availableWidth;\n if (count <= threshold) {\n // No decimation is required until we are above this threshold\n cleanDecimatedDataset(dataset);\n return;\n }\n\n if (isNullOrUndef(_data)) {\n // First time we are seeing this dataset\n // We override the 'data' property with a setter that stores the\n // raw data in _data, but reads the decimated data from _decimated\n dataset._data = data;\n delete dataset.data;\n Object.defineProperty(dataset, 'data', {\n configurable: true,\n enumerable: true,\n get: function() {\n return this._decimated;\n },\n set: function(d) {\n this._data = d;\n }\n });\n }\n\n // Point the chart to the decimated data\n let decimated;\n switch (options.algorithm) {\n case 'lttb':\n decimated = lttbDecimation(data, start, count, availableWidth, options);\n break;\n case 'min-max':\n decimated = minMaxDecimation(data, start, count, availableWidth);\n break;\n default:\n throw new Error(`Unsupported decimation algorithm '${options.algorithm}'`);\n }\n\n dataset._decimated = decimated;\n });\n },\n\n destroy(chart) {\n cleanDecimatedData(chart);\n }\n};\n","import {_boundSegment, _boundSegments, _normalizeAngle} from '../../helpers/index.js';\n\nexport function _segments(line, target, property) {\n const segments = line.segments;\n const points = line.points;\n const tpoints = target.points;\n const parts = [];\n\n for (const segment of segments) {\n let {start, end} = segment;\n end = _findSegmentEnd(start, end, points);\n\n const bounds = _getBounds(property, points[start], points[end], segment.loop);\n\n if (!target.segments) {\n // Special case for boundary not supporting `segments` (simpleArc)\n // Bounds are provided as `target` for partial circle, or undefined for full circle\n parts.push({\n source: segment,\n target: bounds,\n start: points[start],\n end: points[end]\n });\n continue;\n }\n\n // Get all segments from `target` that intersect the bounds of current segment of `line`\n const targetSegments = _boundSegments(target, bounds);\n\n for (const tgt of targetSegments) {\n const subBounds = _getBounds(property, tpoints[tgt.start], tpoints[tgt.end], tgt.loop);\n const fillSources = _boundSegment(segment, points, subBounds);\n\n for (const fillSource of fillSources) {\n parts.push({\n source: fillSource,\n target: tgt,\n start: {\n [property]: _getEdge(bounds, subBounds, 'start', Math.max)\n },\n end: {\n [property]: _getEdge(bounds, subBounds, 'end', Math.min)\n }\n });\n }\n }\n }\n return parts;\n}\n\nexport function _getBounds(property, first, last, loop) {\n if (loop) {\n return;\n }\n let start = first[property];\n let end = last[property];\n\n if (property === 'angle') {\n start = _normalizeAngle(start);\n end = _normalizeAngle(end);\n }\n return {property, start, end};\n}\n\nexport function _pointsFromSegments(boundary, line) {\n const {x = null, y = null} = boundary || {};\n const linePoints = line.points;\n const points = [];\n line.segments.forEach(({start, end}) => {\n end = _findSegmentEnd(start, end, linePoints);\n const first = linePoints[start];\n const last = linePoints[end];\n if (y !== null) {\n points.push({x: first.x, y});\n points.push({x: last.x, y});\n } else if (x !== null) {\n points.push({x, y: first.y});\n points.push({x, y: last.y});\n }\n });\n return points;\n}\n\nexport function _findSegmentEnd(start, end, points) {\n for (;end > start; end--) {\n const point = points[end];\n if (!isNaN(point.x) && !isNaN(point.y)) {\n break;\n }\n }\n return end;\n}\n\nfunction _getEdge(a, b, prop, fn) {\n if (a && b) {\n return fn(a[prop], b[prop]);\n }\n return a ? a[prop] : b ? b[prop] : 0;\n}\n","/**\n * @typedef { import('../../core/core.controller.js').default } Chart\n * @typedef { import('../../core/core.scale.js').default } Scale\n * @typedef { import('../../elements/element.point.js').default } PointElement\n */\n\nimport {LineElement} from '../../elements/index.js';\nimport {isArray} from '../../helpers/index.js';\nimport {_pointsFromSegments} from './filler.segment.js';\n\n/**\n * @param {PointElement[] | { x: number; y: number; }} boundary\n * @param {LineElement} line\n * @return {LineElement?}\n */\nexport function _createBoundaryLine(boundary, line) {\n let points = [];\n let _loop = false;\n\n if (isArray(boundary)) {\n _loop = true;\n // @ts-ignore\n points = boundary;\n } else {\n points = _pointsFromSegments(boundary, line);\n }\n\n return points.length ? new LineElement({\n points,\n options: {tension: 0},\n _loop,\n _fullLoop: _loop\n }) : null;\n}\n\nexport function _shouldApplyFill(source) {\n return source && source.fill !== false;\n}\n","import {isObject, isFinite, valueOrDefault} from '../../helpers/helpers.core.js';\n\n/**\n * @typedef { import('../../core/core.scale.js').default } Scale\n * @typedef { import('../../elements/element.line.js').default } LineElement\n * @typedef { import('../../types/index.js').FillTarget } FillTarget\n * @typedef { import('../../types/index.js').ComplexFillTarget } ComplexFillTarget\n */\n\nexport function _resolveTarget(sources, index, propagate) {\n const source = sources[index];\n let fill = source.fill;\n const visited = [index];\n let target;\n\n if (!propagate) {\n return fill;\n }\n\n while (fill !== false && visited.indexOf(fill) === -1) {\n if (!isFinite(fill)) {\n return fill;\n }\n\n target = sources[fill];\n if (!target) {\n return false;\n }\n\n if (target.visible) {\n return fill;\n }\n\n visited.push(fill);\n fill = target.fill;\n }\n\n return false;\n}\n\n/**\n * @param {LineElement} line\n * @param {number} index\n * @param {number} count\n */\nexport function _decodeFill(line, index, count) {\n /** @type {string | {value: number}} */\n const fill = parseFillOption(line);\n\n if (isObject(fill)) {\n return isNaN(fill.value) ? false : fill;\n }\n\n let target = parseFloat(fill);\n\n if (isFinite(target) && Math.floor(target) === target) {\n return decodeTargetIndex(fill[0], index, target, count);\n }\n\n return ['origin', 'start', 'end', 'stack', 'shape'].indexOf(fill) >= 0 && fill;\n}\n\nfunction decodeTargetIndex(firstCh, index, target, count) {\n if (firstCh === '-' || firstCh === '+') {\n target = index + target;\n }\n\n if (target === index || target < 0 || target >= count) {\n return false;\n }\n\n return target;\n}\n\n/**\n * @param {FillTarget | ComplexFillTarget} fill\n * @param {Scale} scale\n * @returns {number | null}\n */\nexport function _getTargetPixel(fill, scale) {\n let pixel = null;\n if (fill === 'start') {\n pixel = scale.bottom;\n } else if (fill === 'end') {\n pixel = scale.top;\n } else if (isObject(fill)) {\n // @ts-ignore\n pixel = scale.getPixelForValue(fill.value);\n } else if (scale.getBasePixel) {\n pixel = scale.getBasePixel();\n }\n return pixel;\n}\n\n/**\n * @param {FillTarget | ComplexFillTarget} fill\n * @param {Scale} scale\n * @param {number} startValue\n * @returns {number | undefined}\n */\nexport function _getTargetValue(fill, scale, startValue) {\n let value;\n\n if (fill === 'start') {\n value = startValue;\n } else if (fill === 'end') {\n value = scale.options.reverse ? scale.min : scale.max;\n } else if (isObject(fill)) {\n // @ts-ignore\n value = fill.value;\n } else {\n value = scale.getBaseValue();\n }\n return value;\n}\n\n/**\n * @param {LineElement} line\n */\nfunction parseFillOption(line) {\n const options = line.options;\n const fillOption = options.fill;\n let fill = valueOrDefault(fillOption && fillOption.target, fillOption);\n\n if (fill === undefined) {\n fill = !!options.backgroundColor;\n }\n\n if (fill === false || fill === null) {\n return false;\n }\n\n if (fill === true) {\n return 'origin';\n }\n return fill;\n}\n","/**\n * @typedef { import('../../core/core.controller.js').default } Chart\n * @typedef { import('../../core/core.scale.js').default } Scale\n * @typedef { import('../../elements/element.point.js').default } PointElement\n */\n\nimport {LineElement} from '../../elements/index.js';\nimport {_isBetween} from '../../helpers/index.js';\nimport {_createBoundaryLine} from './filler.helper.js';\n\n/**\n * @param {{ chart: Chart; scale: Scale; index: number; line: LineElement; }} source\n * @return {LineElement}\n */\nexport function _buildStackLine(source) {\n const {scale, index, line} = source;\n const points = [];\n const segments = line.segments;\n const sourcePoints = line.points;\n const linesBelow = getLinesBelow(scale, index);\n linesBelow.push(_createBoundaryLine({x: null, y: scale.bottom}, line));\n\n for (let i = 0; i < segments.length; i++) {\n const segment = segments[i];\n for (let j = segment.start; j <= segment.end; j++) {\n addPointsBelow(points, sourcePoints[j], linesBelow);\n }\n }\n return new LineElement({points, options: {}});\n}\n\n/**\n * @param {Scale} scale\n * @param {number} index\n * @return {LineElement[]}\n */\nfunction getLinesBelow(scale, index) {\n const below = [];\n const metas = scale.getMatchingVisibleMetas('line');\n\n for (let i = 0; i < metas.length; i++) {\n const meta = metas[i];\n if (meta.index === index) {\n break;\n }\n if (!meta.hidden) {\n below.unshift(meta.dataset);\n }\n }\n return below;\n}\n\n/**\n * @param {PointElement[]} points\n * @param {PointElement} sourcePoint\n * @param {LineElement[]} linesBelow\n */\nfunction addPointsBelow(points, sourcePoint, linesBelow) {\n const postponed = [];\n for (let j = 0; j < linesBelow.length; j++) {\n const line = linesBelow[j];\n const {first, last, point} = findPoint(line, sourcePoint, 'x');\n\n if (!point || (first && last)) {\n continue;\n }\n if (first) {\n // First point of an segment -> need to add another point before this,\n // from next line below.\n postponed.unshift(point);\n } else {\n points.push(point);\n if (!last) {\n // In the middle of an segment, no need to add more points.\n break;\n }\n }\n }\n points.push(...postponed);\n}\n\n/**\n * @param {LineElement} line\n * @param {PointElement} sourcePoint\n * @param {string} property\n * @returns {{point?: PointElement, first?: boolean, last?: boolean}}\n */\nfunction findPoint(line, sourcePoint, property) {\n const point = line.interpolate(sourcePoint, property);\n if (!point) {\n return {};\n }\n\n const pointValue = point[property];\n const segments = line.segments;\n const linePoints = line.points;\n let first = false;\n let last = false;\n for (let i = 0; i < segments.length; i++) {\n const segment = segments[i];\n const firstValue = linePoints[segment.start][property];\n const lastValue = linePoints[segment.end][property];\n if (_isBetween(pointValue, firstValue, lastValue)) {\n first = pointValue === firstValue;\n last = pointValue === lastValue;\n break;\n }\n }\n return {first, last, point};\n}\n","import {TAU} from '../../helpers/index.js';\n\n// TODO: use elements.ArcElement instead\nexport class simpleArc {\n constructor(opts) {\n this.x = opts.x;\n this.y = opts.y;\n this.radius = opts.radius;\n }\n\n pathSegment(ctx, bounds, opts) {\n const {x, y, radius} = this;\n bounds = bounds || {start: 0, end: TAU};\n ctx.arc(x, y, radius, bounds.end, bounds.start, true);\n return !opts.bounds;\n }\n\n interpolate(point) {\n const {x, y, radius} = this;\n const angle = point.angle;\n return {\n x: x + Math.cos(angle) * radius,\n y: y + Math.sin(angle) * radius,\n angle\n };\n }\n}\n","import {isFinite} from '../../helpers/index.js';\nimport {_createBoundaryLine} from './filler.helper.js';\nimport {_getTargetPixel, _getTargetValue} from './filler.options.js';\nimport {_buildStackLine} from './filler.target.stack.js';\nimport {simpleArc} from './simpleArc.js';\n\n/**\n * @typedef { import('../../core/core.controller.js').default } Chart\n * @typedef { import('../../core/core.scale.js').default } Scale\n * @typedef { import('../../elements/element.point.js').default } PointElement\n */\n\nexport function _getTarget(source) {\n const {chart, fill, line} = source;\n\n if (isFinite(fill)) {\n return getLineByIndex(chart, fill);\n }\n\n if (fill === 'stack') {\n return _buildStackLine(source);\n }\n\n if (fill === 'shape') {\n return true;\n }\n\n const boundary = computeBoundary(source);\n\n if (boundary instanceof simpleArc) {\n return boundary;\n }\n\n return _createBoundaryLine(boundary, line);\n}\n\n/**\n * @param {Chart} chart\n * @param {number} index\n */\nfunction getLineByIndex(chart, index) {\n const meta = chart.getDatasetMeta(index);\n const visible = meta && chart.isDatasetVisible(index);\n return visible ? meta.dataset : null;\n}\n\nfunction computeBoundary(source) {\n const scale = source.scale || {};\n\n if (scale.getPointPositionForValue) {\n return computeCircularBoundary(source);\n }\n return computeLinearBoundary(source);\n}\n\n\nfunction computeLinearBoundary(source) {\n const {scale = {}, fill} = source;\n const pixel = _getTargetPixel(fill, scale);\n\n if (isFinite(pixel)) {\n const horizontal = scale.isHorizontal();\n\n return {\n x: horizontal ? pixel : null,\n y: horizontal ? null : pixel\n };\n }\n\n return null;\n}\n\nfunction computeCircularBoundary(source) {\n const {scale, fill} = source;\n const options = scale.options;\n const length = scale.getLabels().length;\n const start = options.reverse ? scale.max : scale.min;\n const value = _getTargetValue(fill, scale, start);\n const target = [];\n\n if (options.grid.circular) {\n const center = scale.getPointPositionForValue(0, start);\n return new simpleArc({\n x: center.x,\n y: center.y,\n radius: scale.getDistanceFromCenterForValue(value)\n });\n }\n\n for (let i = 0; i < length; ++i) {\n target.push(scale.getPointPositionForValue(i, value));\n }\n return target;\n}\n\n","import {clipArea, unclipArea} from '../../helpers/index.js';\nimport {_findSegmentEnd, _getBounds, _segments} from './filler.segment.js';\nimport {_getTarget} from './filler.target.js';\n\nexport function _drawfill(ctx, source, area) {\n const target = _getTarget(source);\n const {line, scale, axis} = source;\n const lineOpts = line.options;\n const fillOption = lineOpts.fill;\n const color = lineOpts.backgroundColor;\n const {above = color, below = color} = fillOption || {};\n if (target && line.points.length) {\n clipArea(ctx, area);\n doFill(ctx, {line, target, above, below, area, scale, axis});\n unclipArea(ctx);\n }\n}\n\nfunction doFill(ctx, cfg) {\n const {line, target, above, below, area, scale} = cfg;\n const property = line._loop ? 'angle' : cfg.axis;\n\n ctx.save();\n\n if (property === 'x' && below !== above) {\n clipVertical(ctx, target, area.top);\n fill(ctx, {line, target, color: above, scale, property});\n ctx.restore();\n ctx.save();\n clipVertical(ctx, target, area.bottom);\n }\n fill(ctx, {line, target, color: below, scale, property});\n\n ctx.restore();\n}\n\nfunction clipVertical(ctx, target, clipY) {\n const {segments, points} = target;\n let first = true;\n let lineLoop = false;\n\n ctx.beginPath();\n for (const segment of segments) {\n const {start, end} = segment;\n const firstPoint = points[start];\n const lastPoint = points[_findSegmentEnd(start, end, points)];\n if (first) {\n ctx.moveTo(firstPoint.x, firstPoint.y);\n first = false;\n } else {\n ctx.lineTo(firstPoint.x, clipY);\n ctx.lineTo(firstPoint.x, firstPoint.y);\n }\n lineLoop = !!target.pathSegment(ctx, segment, {move: lineLoop});\n if (lineLoop) {\n ctx.closePath();\n } else {\n ctx.lineTo(lastPoint.x, clipY);\n }\n }\n\n ctx.lineTo(target.first().x, clipY);\n ctx.closePath();\n ctx.clip();\n}\n\nfunction fill(ctx, cfg) {\n const {line, target, property, color, scale} = cfg;\n const segments = _segments(line, target, property);\n\n for (const {source: src, target: tgt, start, end} of segments) {\n const {style: {backgroundColor = color} = {}} = src;\n const notShape = target !== true;\n\n ctx.save();\n ctx.fillStyle = backgroundColor;\n\n clipBounds(ctx, scale, notShape && _getBounds(property, start, end));\n\n ctx.beginPath();\n\n const lineLoop = !!line.pathSegment(ctx, src);\n\n let loop;\n if (notShape) {\n if (lineLoop) {\n ctx.closePath();\n } else {\n interpolatedLineTo(ctx, target, end, property);\n }\n\n const targetLoop = !!target.pathSegment(ctx, tgt, {move: lineLoop, reverse: true});\n loop = lineLoop && targetLoop;\n if (!loop) {\n interpolatedLineTo(ctx, target, start, property);\n }\n }\n\n ctx.closePath();\n ctx.fill(loop ? 'evenodd' : 'nonzero');\n\n ctx.restore();\n }\n}\n\nfunction clipBounds(ctx, scale, bounds) {\n const {top, bottom} = scale.chart.chartArea;\n const {property, start, end} = bounds || {};\n if (property === 'x') {\n ctx.beginPath();\n ctx.rect(start, top, end - start, bottom - top);\n ctx.clip();\n }\n}\n\nfunction interpolatedLineTo(ctx, target, point, property) {\n const interpolatedPoint = target.interpolate(point, property);\n if (interpolatedPoint) {\n ctx.lineTo(interpolatedPoint.x, interpolatedPoint.y);\n }\n}\n\n","/**\n * Plugin based on discussion from the following Chart.js issues:\n * @see https://github.com/chartjs/Chart.js/issues/2380#issuecomment-279961569\n * @see https://github.com/chartjs/Chart.js/issues/2440#issuecomment-256461897\n */\n\nimport LineElement from '../../elements/element.line.js';\nimport {_drawfill} from './filler.drawing.js';\nimport {_shouldApplyFill} from './filler.helper.js';\nimport {_decodeFill, _resolveTarget} from './filler.options.js';\n\nexport default {\n id: 'filler',\n\n afterDatasetsUpdate(chart, _args, options) {\n const count = (chart.data.datasets || []).length;\n const sources = [];\n let meta, i, line, source;\n\n for (i = 0; i < count; ++i) {\n meta = chart.getDatasetMeta(i);\n line = meta.dataset;\n source = null;\n\n if (line && line.options && line instanceof LineElement) {\n source = {\n visible: chart.isDatasetVisible(i),\n index: i,\n fill: _decodeFill(line, i, count),\n chart,\n axis: meta.controller.options.indexAxis,\n scale: meta.vScale,\n line,\n };\n }\n\n meta.$filler = source;\n sources.push(source);\n }\n\n for (i = 0; i < count; ++i) {\n source = sources[i];\n if (!source || source.fill === false) {\n continue;\n }\n\n source.fill = _resolveTarget(sources, i, options.propagate);\n }\n },\n\n beforeDraw(chart, _args, options) {\n const draw = options.drawTime === 'beforeDraw';\n const metasets = chart.getSortedVisibleDatasetMetas();\n const area = chart.chartArea;\n for (let i = metasets.length - 1; i >= 0; --i) {\n const source = metasets[i].$filler;\n if (!source) {\n continue;\n }\n\n source.line.updateControlPoints(area, source.axis);\n if (draw && source.fill) {\n _drawfill(chart.ctx, source, area);\n }\n }\n },\n\n beforeDatasetsDraw(chart, _args, options) {\n if (options.drawTime !== 'beforeDatasetsDraw') {\n return;\n }\n\n const metasets = chart.getSortedVisibleDatasetMetas();\n for (let i = metasets.length - 1; i >= 0; --i) {\n const source = metasets[i].$filler;\n\n if (_shouldApplyFill(source)) {\n _drawfill(chart.ctx, source, chart.chartArea);\n }\n }\n },\n\n beforeDatasetDraw(chart, args, options) {\n const source = args.meta.$filler;\n\n if (!_shouldApplyFill(source) || options.drawTime !== 'beforeDatasetDraw') {\n return;\n }\n\n _drawfill(chart.ctx, source, chart.chartArea);\n },\n\n defaults: {\n propagate: true,\n drawTime: 'beforeDatasetDraw'\n }\n};\n","import defaults from '../core/core.defaults.js';\nimport Element from '../core/core.element.js';\nimport layouts from '../core/core.layouts.js';\nimport {addRoundedRectPath, drawPointLegend, renderText} from '../helpers/helpers.canvas.js';\nimport {\n _isBetween,\n callback as call,\n clipArea,\n getRtlAdapter,\n overrideTextDirection,\n restoreTextDirection,\n toFont,\n toPadding,\n unclipArea,\n valueOrDefault,\n} from '../helpers/index.js';\nimport {_alignStartEnd, _textX, _toLeftRightCenter} from '../helpers/helpers.extras.js';\nimport {toTRBLCorners} from '../helpers/helpers.options.js';\n\n/**\n * @typedef { import('../types/index.js').ChartEvent } ChartEvent\n */\n\nconst getBoxSize = (labelOpts, fontSize) => {\n let {boxHeight = fontSize, boxWidth = fontSize} = labelOpts;\n\n if (labelOpts.usePointStyle) {\n boxHeight = Math.min(boxHeight, fontSize);\n boxWidth = labelOpts.pointStyleWidth || Math.min(boxWidth, fontSize);\n }\n\n return {\n boxWidth,\n boxHeight,\n itemHeight: Math.max(fontSize, boxHeight)\n };\n};\n\nconst itemsEqual = (a, b) => a !== null && b !== null && a.datasetIndex === b.datasetIndex && a.index === b.index;\n\nexport class Legend extends Element {\n\n /**\n\t * @param {{ ctx: any; options: any; chart: any; }} config\n\t */\n constructor(config) {\n super();\n\n this._added = false;\n\n // Contains hit boxes for each dataset (in dataset order)\n this.legendHitBoxes = [];\n\n /**\n \t\t * @private\n \t\t */\n this._hoveredItem = null;\n\n // Are we in doughnut mode which has a different data type\n this.doughnutMode = false;\n\n this.chart = config.chart;\n this.options = config.options;\n this.ctx = config.ctx;\n this.legendItems = undefined;\n this.columnSizes = undefined;\n this.lineWidths = undefined;\n this.maxHeight = undefined;\n this.maxWidth = undefined;\n this.top = undefined;\n this.bottom = undefined;\n this.left = undefined;\n this.right = undefined;\n this.height = undefined;\n this.width = undefined;\n this._margins = undefined;\n this.position = undefined;\n this.weight = undefined;\n this.fullSize = undefined;\n }\n\n update(maxWidth, maxHeight, margins) {\n this.maxWidth = maxWidth;\n this.maxHeight = maxHeight;\n this._margins = margins;\n\n this.setDimensions();\n this.buildLabels();\n this.fit();\n }\n\n setDimensions() {\n if (this.isHorizontal()) {\n this.width = this.maxWidth;\n this.left = this._margins.left;\n this.right = this.width;\n } else {\n this.height = this.maxHeight;\n this.top = this._margins.top;\n this.bottom = this.height;\n }\n }\n\n buildLabels() {\n const labelOpts = this.options.labels || {};\n let legendItems = call(labelOpts.generateLabels, [this.chart], this) || [];\n\n if (labelOpts.filter) {\n legendItems = legendItems.filter((item) => labelOpts.filter(item, this.chart.data));\n }\n\n if (labelOpts.sort) {\n legendItems = legendItems.sort((a, b) => labelOpts.sort(a, b, this.chart.data));\n }\n\n if (this.options.reverse) {\n legendItems.reverse();\n }\n\n this.legendItems = legendItems;\n }\n\n fit() {\n const {options, ctx} = this;\n\n // The legend may not be displayed for a variety of reasons including\n // the fact that the defaults got set to `false`.\n // When the legend is not displayed, there are no guarantees that the options\n // are correctly formatted so we need to bail out as early as possible.\n if (!options.display) {\n this.width = this.height = 0;\n return;\n }\n\n const labelOpts = options.labels;\n const labelFont = toFont(labelOpts.font);\n const fontSize = labelFont.size;\n const titleHeight = this._computeTitleHeight();\n const {boxWidth, itemHeight} = getBoxSize(labelOpts, fontSize);\n\n let width, height;\n\n ctx.font = labelFont.string;\n\n if (this.isHorizontal()) {\n width = this.maxWidth; // fill all the width\n height = this._fitRows(titleHeight, fontSize, boxWidth, itemHeight) + 10;\n } else {\n height = this.maxHeight; // fill all the height\n width = this._fitCols(titleHeight, labelFont, boxWidth, itemHeight) + 10;\n }\n\n this.width = Math.min(width, options.maxWidth || this.maxWidth);\n this.height = Math.min(height, options.maxHeight || this.maxHeight);\n }\n\n /**\n\t * @private\n\t */\n _fitRows(titleHeight, fontSize, boxWidth, itemHeight) {\n const {ctx, maxWidth, options: {labels: {padding}}} = this;\n const hitboxes = this.legendHitBoxes = [];\n // Width of each line of legend boxes. Labels wrap onto multiple lines when there are too many to fit on one\n const lineWidths = this.lineWidths = [0];\n const lineHeight = itemHeight + padding;\n let totalHeight = titleHeight;\n\n ctx.textAlign = 'left';\n ctx.textBaseline = 'middle';\n\n let row = -1;\n let top = -lineHeight;\n this.legendItems.forEach((legendItem, i) => {\n const itemWidth = boxWidth + (fontSize / 2) + ctx.measureText(legendItem.text).width;\n\n if (i === 0 || lineWidths[lineWidths.length - 1] + itemWidth + 2 * padding > maxWidth) {\n totalHeight += lineHeight;\n lineWidths[lineWidths.length - (i > 0 ? 0 : 1)] = 0;\n top += lineHeight;\n row++;\n }\n\n hitboxes[i] = {left: 0, top, row, width: itemWidth, height: itemHeight};\n\n lineWidths[lineWidths.length - 1] += itemWidth + padding;\n });\n\n return totalHeight;\n }\n\n _fitCols(titleHeight, labelFont, boxWidth, _itemHeight) {\n const {ctx, maxHeight, options: {labels: {padding}}} = this;\n const hitboxes = this.legendHitBoxes = [];\n const columnSizes = this.columnSizes = [];\n const heightLimit = maxHeight - titleHeight;\n\n let totalWidth = padding;\n let currentColWidth = 0;\n let currentColHeight = 0;\n\n let left = 0;\n let col = 0;\n\n this.legendItems.forEach((legendItem, i) => {\n const {itemWidth, itemHeight} = calculateItemSize(boxWidth, labelFont, ctx, legendItem, _itemHeight);\n\n // If too tall, go to new column\n if (i > 0 && currentColHeight + itemHeight + 2 * padding > heightLimit) {\n totalWidth += currentColWidth + padding;\n columnSizes.push({width: currentColWidth, height: currentColHeight}); // previous column size\n left += currentColWidth + padding;\n col++;\n currentColWidth = currentColHeight = 0;\n }\n\n // Store the hitbox width and height here. Final position will be updated in `draw`\n hitboxes[i] = {left, top: currentColHeight, col, width: itemWidth, height: itemHeight};\n\n // Get max width\n currentColWidth = Math.max(currentColWidth, itemWidth);\n currentColHeight += itemHeight + padding;\n });\n\n totalWidth += currentColWidth;\n columnSizes.push({width: currentColWidth, height: currentColHeight}); // previous column size\n\n return totalWidth;\n }\n\n adjustHitBoxes() {\n if (!this.options.display) {\n return;\n }\n const titleHeight = this._computeTitleHeight();\n const {legendHitBoxes: hitboxes, options: {align, labels: {padding}, rtl}} = this;\n const rtlHelper = getRtlAdapter(rtl, this.left, this.width);\n if (this.isHorizontal()) {\n let row = 0;\n let left = _alignStartEnd(align, this.left + padding, this.right - this.lineWidths[row]);\n for (const hitbox of hitboxes) {\n if (row !== hitbox.row) {\n row = hitbox.row;\n left = _alignStartEnd(align, this.left + padding, this.right - this.lineWidths[row]);\n }\n hitbox.top += this.top + titleHeight + padding;\n hitbox.left = rtlHelper.leftForLtr(rtlHelper.x(left), hitbox.width);\n left += hitbox.width + padding;\n }\n } else {\n let col = 0;\n let top = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - this.columnSizes[col].height);\n for (const hitbox of hitboxes) {\n if (hitbox.col !== col) {\n col = hitbox.col;\n top = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - this.columnSizes[col].height);\n }\n hitbox.top = top;\n hitbox.left += this.left + padding;\n hitbox.left = rtlHelper.leftForLtr(rtlHelper.x(hitbox.left), hitbox.width);\n top += hitbox.height + padding;\n }\n }\n }\n\n isHorizontal() {\n return this.options.position === 'top' || this.options.position === 'bottom';\n }\n\n draw() {\n if (this.options.display) {\n const ctx = this.ctx;\n clipArea(ctx, this);\n\n this._draw();\n\n unclipArea(ctx);\n }\n }\n\n /**\n\t * @private\n\t */\n _draw() {\n const {options: opts, columnSizes, lineWidths, ctx} = this;\n const {align, labels: labelOpts} = opts;\n const defaultColor = defaults.color;\n const rtlHelper = getRtlAdapter(opts.rtl, this.left, this.width);\n const labelFont = toFont(labelOpts.font);\n const {padding} = labelOpts;\n const fontSize = labelFont.size;\n const halfFontSize = fontSize / 2;\n let cursor;\n\n this.drawTitle();\n\n // Canvas setup\n ctx.textAlign = rtlHelper.textAlign('left');\n ctx.textBaseline = 'middle';\n ctx.lineWidth = 0.5;\n ctx.font = labelFont.string;\n\n const {boxWidth, boxHeight, itemHeight} = getBoxSize(labelOpts, fontSize);\n\n // current position\n const drawLegendBox = function(x, y, legendItem) {\n if (isNaN(boxWidth) || boxWidth <= 0 || isNaN(boxHeight) || boxHeight < 0) {\n return;\n }\n\n // Set the ctx for the box\n ctx.save();\n\n const lineWidth = valueOrDefault(legendItem.lineWidth, 1);\n ctx.fillStyle = valueOrDefault(legendItem.fillStyle, defaultColor);\n ctx.lineCap = valueOrDefault(legendItem.lineCap, 'butt');\n ctx.lineDashOffset = valueOrDefault(legendItem.lineDashOffset, 0);\n ctx.lineJoin = valueOrDefault(legendItem.lineJoin, 'miter');\n ctx.lineWidth = lineWidth;\n ctx.strokeStyle = valueOrDefault(legendItem.strokeStyle, defaultColor);\n\n ctx.setLineDash(valueOrDefault(legendItem.lineDash, []));\n\n if (labelOpts.usePointStyle) {\n // Recalculate x and y for drawPoint() because its expecting\n // x and y to be center of figure (instead of top left)\n const drawOptions = {\n radius: boxHeight * Math.SQRT2 / 2,\n pointStyle: legendItem.pointStyle,\n rotation: legendItem.rotation,\n borderWidth: lineWidth\n };\n const centerX = rtlHelper.xPlus(x, boxWidth / 2);\n const centerY = y + halfFontSize;\n\n // Draw pointStyle as legend symbol\n drawPointLegend(ctx, drawOptions, centerX, centerY, labelOpts.pointStyleWidth && boxWidth);\n } else {\n // Draw box as legend symbol\n // Adjust position when boxHeight < fontSize (want it centered)\n const yBoxTop = y + Math.max((fontSize - boxHeight) / 2, 0);\n const xBoxLeft = rtlHelper.leftForLtr(x, boxWidth);\n const borderRadius = toTRBLCorners(legendItem.borderRadius);\n\n ctx.beginPath();\n\n if (Object.values(borderRadius).some(v => v !== 0)) {\n addRoundedRectPath(ctx, {\n x: xBoxLeft,\n y: yBoxTop,\n w: boxWidth,\n h: boxHeight,\n radius: borderRadius,\n });\n } else {\n ctx.rect(xBoxLeft, yBoxTop, boxWidth, boxHeight);\n }\n\n ctx.fill();\n if (lineWidth !== 0) {\n ctx.stroke();\n }\n }\n\n ctx.restore();\n };\n\n const fillText = function(x, y, legendItem) {\n renderText(ctx, legendItem.text, x, y + (itemHeight / 2), labelFont, {\n strikethrough: legendItem.hidden,\n textAlign: rtlHelper.textAlign(legendItem.textAlign)\n });\n };\n\n // Horizontal\n const isHorizontal = this.isHorizontal();\n const titleHeight = this._computeTitleHeight();\n if (isHorizontal) {\n cursor = {\n x: _alignStartEnd(align, this.left + padding, this.right - lineWidths[0]),\n y: this.top + padding + titleHeight,\n line: 0\n };\n } else {\n cursor = {\n x: this.left + padding,\n y: _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - columnSizes[0].height),\n line: 0\n };\n }\n\n overrideTextDirection(this.ctx, opts.textDirection);\n\n const lineHeight = itemHeight + padding;\n this.legendItems.forEach((legendItem, i) => {\n ctx.strokeStyle = legendItem.fontColor; // for strikethrough effect\n ctx.fillStyle = legendItem.fontColor; // render in correct colour\n\n const textWidth = ctx.measureText(legendItem.text).width;\n const textAlign = rtlHelper.textAlign(legendItem.textAlign || (legendItem.textAlign = labelOpts.textAlign));\n const width = boxWidth + halfFontSize + textWidth;\n let x = cursor.x;\n let y = cursor.y;\n\n rtlHelper.setWidth(this.width);\n\n if (isHorizontal) {\n if (i > 0 && x + width + padding > this.right) {\n y = cursor.y += lineHeight;\n cursor.line++;\n x = cursor.x = _alignStartEnd(align, this.left + padding, this.right - lineWidths[cursor.line]);\n }\n } else if (i > 0 && y + lineHeight > this.bottom) {\n x = cursor.x = x + columnSizes[cursor.line].width + padding;\n cursor.line++;\n y = cursor.y = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - columnSizes[cursor.line].height);\n }\n\n const realX = rtlHelper.x(x);\n\n drawLegendBox(realX, y, legendItem);\n\n x = _textX(textAlign, x + boxWidth + halfFontSize, isHorizontal ? x + width : this.right, opts.rtl);\n\n // Fill the actual label\n fillText(rtlHelper.x(x), y, legendItem);\n\n if (isHorizontal) {\n cursor.x += width + padding;\n } else if (typeof legendItem.text !== 'string') {\n const fontLineHeight = labelFont.lineHeight;\n cursor.y += calculateLegendItemHeight(legendItem, fontLineHeight) + padding;\n } else {\n cursor.y += lineHeight;\n }\n });\n\n restoreTextDirection(this.ctx, opts.textDirection);\n }\n\n /**\n\t * @protected\n\t */\n drawTitle() {\n const opts = this.options;\n const titleOpts = opts.title;\n const titleFont = toFont(titleOpts.font);\n const titlePadding = toPadding(titleOpts.padding);\n\n if (!titleOpts.display) {\n return;\n }\n\n const rtlHelper = getRtlAdapter(opts.rtl, this.left, this.width);\n const ctx = this.ctx;\n const position = titleOpts.position;\n const halfFontSize = titleFont.size / 2;\n const topPaddingPlusHalfFontSize = titlePadding.top + halfFontSize;\n let y;\n\n // These defaults are used when the legend is vertical.\n // When horizontal, they are computed below.\n let left = this.left;\n let maxWidth = this.width;\n\n if (this.isHorizontal()) {\n // Move left / right so that the title is above the legend lines\n maxWidth = Math.max(...this.lineWidths);\n y = this.top + topPaddingPlusHalfFontSize;\n left = _alignStartEnd(opts.align, left, this.right - maxWidth);\n } else {\n // Move down so that the title is above the legend stack in every alignment\n const maxHeight = this.columnSizes.reduce((acc, size) => Math.max(acc, size.height), 0);\n y = topPaddingPlusHalfFontSize + _alignStartEnd(opts.align, this.top, this.bottom - maxHeight - opts.labels.padding - this._computeTitleHeight());\n }\n\n // Now that we know the left edge of the inner legend box, compute the correct\n // X coordinate from the title alignment\n const x = _alignStartEnd(position, left, left + maxWidth);\n\n // Canvas setup\n ctx.textAlign = rtlHelper.textAlign(_toLeftRightCenter(position));\n ctx.textBaseline = 'middle';\n ctx.strokeStyle = titleOpts.color;\n ctx.fillStyle = titleOpts.color;\n ctx.font = titleFont.string;\n\n renderText(ctx, titleOpts.text, x, y, titleFont);\n }\n\n /**\n\t * @private\n\t */\n _computeTitleHeight() {\n const titleOpts = this.options.title;\n const titleFont = toFont(titleOpts.font);\n const titlePadding = toPadding(titleOpts.padding);\n return titleOpts.display ? titleFont.lineHeight + titlePadding.height : 0;\n }\n\n /**\n\t * @private\n\t */\n _getLegendItemAt(x, y) {\n let i, hitBox, lh;\n\n if (_isBetween(x, this.left, this.right)\n && _isBetween(y, this.top, this.bottom)) {\n // See if we are touching one of the dataset boxes\n lh = this.legendHitBoxes;\n for (i = 0; i < lh.length; ++i) {\n hitBox = lh[i];\n\n if (_isBetween(x, hitBox.left, hitBox.left + hitBox.width)\n && _isBetween(y, hitBox.top, hitBox.top + hitBox.height)) {\n // Touching an element\n return this.legendItems[i];\n }\n }\n }\n\n return null;\n }\n\n /**\n\t * Handle an event\n\t * @param {ChartEvent} e - The event to handle\n\t */\n handleEvent(e) {\n const opts = this.options;\n if (!isListened(e.type, opts)) {\n return;\n }\n\n // Chart event already has relative position in it\n const hoveredItem = this._getLegendItemAt(e.x, e.y);\n\n if (e.type === 'mousemove' || e.type === 'mouseout') {\n const previous = this._hoveredItem;\n const sameItem = itemsEqual(previous, hoveredItem);\n if (previous && !sameItem) {\n call(opts.onLeave, [e, previous, this], this);\n }\n\n this._hoveredItem = hoveredItem;\n\n if (hoveredItem && !sameItem) {\n call(opts.onHover, [e, hoveredItem, this], this);\n }\n } else if (hoveredItem) {\n call(opts.onClick, [e, hoveredItem, this], this);\n }\n }\n}\n\nfunction calculateItemSize(boxWidth, labelFont, ctx, legendItem, _itemHeight) {\n const itemWidth = calculateItemWidth(legendItem, boxWidth, labelFont, ctx);\n const itemHeight = calculateItemHeight(_itemHeight, legendItem, labelFont.lineHeight);\n return {itemWidth, itemHeight};\n}\n\nfunction calculateItemWidth(legendItem, boxWidth, labelFont, ctx) {\n let legendItemText = legendItem.text;\n if (legendItemText && typeof legendItemText !== 'string') {\n legendItemText = legendItemText.reduce((a, b) => a.length > b.length ? a : b);\n }\n return boxWidth + (labelFont.size / 2) + ctx.measureText(legendItemText).width;\n}\n\nfunction calculateItemHeight(_itemHeight, legendItem, fontLineHeight) {\n let itemHeight = _itemHeight;\n if (typeof legendItem.text !== 'string') {\n itemHeight = calculateLegendItemHeight(legendItem, fontLineHeight);\n }\n return itemHeight;\n}\n\nfunction calculateLegendItemHeight(legendItem, fontLineHeight) {\n const labelHeight = legendItem.text ? legendItem.text.length : 0;\n return fontLineHeight * labelHeight;\n}\n\nfunction isListened(type, opts) {\n if ((type === 'mousemove' || type === 'mouseout') && (opts.onHover || opts.onLeave)) {\n return true;\n }\n if (opts.onClick && (type === 'click' || type === 'mouseup')) {\n return true;\n }\n return false;\n}\n\nexport default {\n id: 'legend',\n\n /**\n\t * For tests\n\t * @private\n\t */\n _element: Legend,\n\n start(chart, _args, options) {\n const legend = chart.legend = new Legend({ctx: chart.ctx, options, chart});\n layouts.configure(chart, legend, options);\n layouts.addBox(chart, legend);\n },\n\n stop(chart) {\n layouts.removeBox(chart, chart.legend);\n delete chart.legend;\n },\n\n // During the beforeUpdate step, the layout configuration needs to run\n // This ensures that if the legend position changes (via an option update)\n // the layout system respects the change. See https://github.com/chartjs/Chart.js/issues/7527\n beforeUpdate(chart, _args, options) {\n const legend = chart.legend;\n layouts.configure(chart, legend, options);\n legend.options = options;\n },\n\n // The labels need to be built after datasets are updated to ensure that colors\n // and other styling are correct. See https://github.com/chartjs/Chart.js/issues/6968\n afterUpdate(chart) {\n const legend = chart.legend;\n legend.buildLabels();\n legend.adjustHitBoxes();\n },\n\n\n afterEvent(chart, args) {\n if (!args.replay) {\n chart.legend.handleEvent(args.event);\n }\n },\n\n defaults: {\n display: true,\n position: 'top',\n align: 'center',\n fullSize: true,\n reverse: false,\n weight: 1000,\n\n // a callback that will handle\n onClick(e, legendItem, legend) {\n const index = legendItem.datasetIndex;\n const ci = legend.chart;\n if (ci.isDatasetVisible(index)) {\n ci.hide(index);\n legendItem.hidden = true;\n } else {\n ci.show(index);\n legendItem.hidden = false;\n }\n },\n\n onHover: null,\n onLeave: null,\n\n labels: {\n color: (ctx) => ctx.chart.options.color,\n boxWidth: 40,\n padding: 10,\n // Generates labels shown in the legend\n // Valid properties to return:\n // text : text to display\n // fillStyle : fill of coloured box\n // strokeStyle: stroke of coloured box\n // hidden : if this legend item refers to a hidden item\n // lineCap : cap style for line\n // lineDash\n // lineDashOffset :\n // lineJoin :\n // lineWidth :\n generateLabels(chart) {\n const datasets = chart.data.datasets;\n const {labels: {usePointStyle, pointStyle, textAlign, color, useBorderRadius, borderRadius}} = chart.legend.options;\n\n return chart._getSortedDatasetMetas().map((meta) => {\n const style = meta.controller.getStyle(usePointStyle ? 0 : undefined);\n const borderWidth = toPadding(style.borderWidth);\n\n return {\n text: datasets[meta.index].label,\n fillStyle: style.backgroundColor,\n fontColor: color,\n hidden: !meta.visible,\n lineCap: style.borderCapStyle,\n lineDash: style.borderDash,\n lineDashOffset: style.borderDashOffset,\n lineJoin: style.borderJoinStyle,\n lineWidth: (borderWidth.width + borderWidth.height) / 4,\n strokeStyle: style.borderColor,\n pointStyle: pointStyle || style.pointStyle,\n rotation: style.rotation,\n textAlign: textAlign || style.textAlign,\n borderRadius: useBorderRadius && (borderRadius || style.borderRadius),\n\n // Below is extra data used for toggling the datasets\n datasetIndex: meta.index\n };\n }, this);\n }\n },\n\n title: {\n color: (ctx) => ctx.chart.options.color,\n display: false,\n position: 'center',\n text: '',\n }\n },\n\n descriptors: {\n _scriptable: (name) => !name.startsWith('on'),\n labels: {\n _scriptable: (name) => !['generateLabels', 'filter', 'sort'].includes(name),\n }\n },\n};\n","import Element from '../core/core.element.js';\nimport layouts from '../core/core.layouts.js';\nimport {PI, isArray, toPadding, toFont} from '../helpers/index.js';\nimport {_toLeftRightCenter, _alignStartEnd} from '../helpers/helpers.extras.js';\nimport {renderText} from '../helpers/helpers.canvas.js';\n\nexport class Title extends Element {\n /**\n\t * @param {{ ctx: any; options: any; chart: any; }} config\n\t */\n constructor(config) {\n super();\n\n this.chart = config.chart;\n this.options = config.options;\n this.ctx = config.ctx;\n this._padding = undefined;\n this.top = undefined;\n this.bottom = undefined;\n this.left = undefined;\n this.right = undefined;\n this.width = undefined;\n this.height = undefined;\n this.position = undefined;\n this.weight = undefined;\n this.fullSize = undefined;\n }\n\n update(maxWidth, maxHeight) {\n const opts = this.options;\n\n this.left = 0;\n this.top = 0;\n\n if (!opts.display) {\n this.width = this.height = this.right = this.bottom = 0;\n return;\n }\n\n this.width = this.right = maxWidth;\n this.height = this.bottom = maxHeight;\n\n const lineCount = isArray(opts.text) ? opts.text.length : 1;\n this._padding = toPadding(opts.padding);\n const textSize = lineCount * toFont(opts.font).lineHeight + this._padding.height;\n\n if (this.isHorizontal()) {\n this.height = textSize;\n } else {\n this.width = textSize;\n }\n }\n\n isHorizontal() {\n const pos = this.options.position;\n return pos === 'top' || pos === 'bottom';\n }\n\n _drawArgs(offset) {\n const {top, left, bottom, right, options} = this;\n const align = options.align;\n let rotation = 0;\n let maxWidth, titleX, titleY;\n\n if (this.isHorizontal()) {\n titleX = _alignStartEnd(align, left, right);\n titleY = top + offset;\n maxWidth = right - left;\n } else {\n if (options.position === 'left') {\n titleX = left + offset;\n titleY = _alignStartEnd(align, bottom, top);\n rotation = PI * -0.5;\n } else {\n titleX = right - offset;\n titleY = _alignStartEnd(align, top, bottom);\n rotation = PI * 0.5;\n }\n maxWidth = bottom - top;\n }\n return {titleX, titleY, maxWidth, rotation};\n }\n\n draw() {\n const ctx = this.ctx;\n const opts = this.options;\n\n if (!opts.display) {\n return;\n }\n\n const fontOpts = toFont(opts.font);\n const lineHeight = fontOpts.lineHeight;\n const offset = lineHeight / 2 + this._padding.top;\n const {titleX, titleY, maxWidth, rotation} = this._drawArgs(offset);\n\n renderText(ctx, opts.text, 0, 0, fontOpts, {\n color: opts.color,\n maxWidth,\n rotation,\n textAlign: _toLeftRightCenter(opts.align),\n textBaseline: 'middle',\n translation: [titleX, titleY],\n });\n }\n}\n\nfunction createTitle(chart, titleOpts) {\n const title = new Title({\n ctx: chart.ctx,\n options: titleOpts,\n chart\n });\n\n layouts.configure(chart, title, titleOpts);\n layouts.addBox(chart, title);\n chart.titleBlock = title;\n}\n\nexport default {\n id: 'title',\n\n /**\n\t * For tests\n\t * @private\n\t */\n _element: Title,\n\n start(chart, _args, options) {\n createTitle(chart, options);\n },\n\n stop(chart) {\n const titleBlock = chart.titleBlock;\n layouts.removeBox(chart, titleBlock);\n delete chart.titleBlock;\n },\n\n beforeUpdate(chart, _args, options) {\n const title = chart.titleBlock;\n layouts.configure(chart, title, options);\n title.options = options;\n },\n\n defaults: {\n align: 'center',\n display: false,\n font: {\n weight: 'bold',\n },\n fullSize: true,\n padding: 10,\n position: 'top',\n text: '',\n weight: 2000 // by default greater than legend (1000) to be above\n },\n\n defaultRoutes: {\n color: 'color'\n },\n\n descriptors: {\n _scriptable: true,\n _indexable: false,\n },\n};\n","import {Title} from './plugin.title.js';\nimport layouts from '../core/core.layouts.js';\n\nconst map = new WeakMap();\n\nexport default {\n id: 'subtitle',\n\n start(chart, _args, options) {\n const title = new Title({\n ctx: chart.ctx,\n options,\n chart\n });\n\n layouts.configure(chart, title, options);\n layouts.addBox(chart, title);\n map.set(chart, title);\n },\n\n stop(chart) {\n layouts.removeBox(chart, map.get(chart));\n map.delete(chart);\n },\n\n beforeUpdate(chart, _args, options) {\n const title = map.get(chart);\n layouts.configure(chart, title, options);\n title.options = options;\n },\n\n defaults: {\n align: 'center',\n display: false,\n font: {\n weight: 'normal',\n },\n fullSize: true,\n padding: 0,\n position: 'top',\n text: '',\n weight: 1500 // by default greater than legend (1000) and smaller than title (2000)\n },\n\n defaultRoutes: {\n color: 'color'\n },\n\n descriptors: {\n _scriptable: true,\n _indexable: false,\n },\n};\n","import Animations from '../core/core.animations.js';\nimport Element from '../core/core.element.js';\nimport {addRoundedRectPath} from '../helpers/helpers.canvas.js';\nimport {each, noop, isNullOrUndef, isArray, _elementsEqual, isObject} from '../helpers/helpers.core.js';\nimport {toFont, toPadding, toTRBLCorners} from '../helpers/helpers.options.js';\nimport {getRtlAdapter, overrideTextDirection, restoreTextDirection} from '../helpers/helpers.rtl.js';\nimport {distanceBetweenPoints, _limitValue} from '../helpers/helpers.math.js';\nimport {createContext, drawPoint} from '../helpers/index.js';\n\n/**\n * @typedef { import('../platform/platform.base.js').Chart } Chart\n * @typedef { import('../types/index.js').ChartEvent } ChartEvent\n * @typedef { import('../types/index.js').ActiveElement } ActiveElement\n * @typedef { import('../core/core.interaction.js').InteractionItem } InteractionItem\n */\n\nconst positioners = {\n /**\n\t * Average mode places the tooltip at the average position of the elements shown\n\t */\n average(items) {\n if (!items.length) {\n return false;\n }\n\n let i, len;\n let x = 0;\n let y = 0;\n let count = 0;\n\n for (i = 0, len = items.length; i < len; ++i) {\n const el = items[i].element;\n if (el && el.hasValue()) {\n const pos = el.tooltipPosition();\n x += pos.x;\n y += pos.y;\n ++count;\n }\n }\n\n return {\n x: x / count,\n y: y / count\n };\n },\n\n /**\n\t * Gets the tooltip position nearest of the item nearest to the event position\n\t */\n nearest(items, eventPosition) {\n if (!items.length) {\n return false;\n }\n\n let x = eventPosition.x;\n let y = eventPosition.y;\n let minDistance = Number.POSITIVE_INFINITY;\n let i, len, nearestElement;\n\n for (i = 0, len = items.length; i < len; ++i) {\n const el = items[i].element;\n if (el && el.hasValue()) {\n const center = el.getCenterPoint();\n const d = distanceBetweenPoints(eventPosition, center);\n\n if (d < minDistance) {\n minDistance = d;\n nearestElement = el;\n }\n }\n }\n\n if (nearestElement) {\n const tp = nearestElement.tooltipPosition();\n x = tp.x;\n y = tp.y;\n }\n\n return {\n x,\n y\n };\n }\n};\n\n// Helper to push or concat based on if the 2nd parameter is an array or not\nfunction pushOrConcat(base, toPush) {\n if (toPush) {\n if (isArray(toPush)) {\n // base = base.concat(toPush);\n Array.prototype.push.apply(base, toPush);\n } else {\n base.push(toPush);\n }\n }\n\n return base;\n}\n\n/**\n * Returns array of strings split by newline\n * @param {*} str - The value to split by newline.\n * @returns {string|string[]} value if newline present - Returned from String split() method\n * @function\n */\nfunction splitNewlines(str) {\n if ((typeof str === 'string' || str instanceof String) && str.indexOf('\\n') > -1) {\n return str.split('\\n');\n }\n return str;\n}\n\n\n/**\n * Private helper to create a tooltip item model\n * @param {Chart} chart\n * @param {ActiveElement} item - {element, index, datasetIndex} to create the tooltip item for\n * @return new tooltip item\n */\nfunction createTooltipItem(chart, item) {\n const {element, datasetIndex, index} = item;\n const controller = chart.getDatasetMeta(datasetIndex).controller;\n const {label, value} = controller.getLabelAndValue(index);\n\n return {\n chart,\n label,\n parsed: controller.getParsed(index),\n raw: chart.data.datasets[datasetIndex].data[index],\n formattedValue: value,\n dataset: controller.getDataset(),\n dataIndex: index,\n datasetIndex,\n element\n };\n}\n\n/**\n * Get the size of the tooltip\n */\nfunction getTooltipSize(tooltip, options) {\n const ctx = tooltip.chart.ctx;\n const {body, footer, title} = tooltip;\n const {boxWidth, boxHeight} = options;\n const bodyFont = toFont(options.bodyFont);\n const titleFont = toFont(options.titleFont);\n const footerFont = toFont(options.footerFont);\n const titleLineCount = title.length;\n const footerLineCount = footer.length;\n const bodyLineItemCount = body.length;\n\n const padding = toPadding(options.padding);\n let height = padding.height;\n let width = 0;\n\n // Count of all lines in the body\n let combinedBodyLength = body.reduce((count, bodyItem) => count + bodyItem.before.length + bodyItem.lines.length + bodyItem.after.length, 0);\n combinedBodyLength += tooltip.beforeBody.length + tooltip.afterBody.length;\n\n if (titleLineCount) {\n height += titleLineCount * titleFont.lineHeight\n\t\t\t+ (titleLineCount - 1) * options.titleSpacing\n\t\t\t+ options.titleMarginBottom;\n }\n if (combinedBodyLength) {\n // Body lines may include some extra height depending on boxHeight\n const bodyLineHeight = options.displayColors ? Math.max(boxHeight, bodyFont.lineHeight) : bodyFont.lineHeight;\n height += bodyLineItemCount * bodyLineHeight\n\t\t\t+ (combinedBodyLength - bodyLineItemCount) * bodyFont.lineHeight\n\t\t\t+ (combinedBodyLength - 1) * options.bodySpacing;\n }\n if (footerLineCount) {\n height += options.footerMarginTop\n\t\t\t+ footerLineCount * footerFont.lineHeight\n\t\t\t+ (footerLineCount - 1) * options.footerSpacing;\n }\n\n // Title width\n let widthPadding = 0;\n const maxLineWidth = function(line) {\n width = Math.max(width, ctx.measureText(line).width + widthPadding);\n };\n\n ctx.save();\n\n ctx.font = titleFont.string;\n each(tooltip.title, maxLineWidth);\n\n // Body width\n ctx.font = bodyFont.string;\n each(tooltip.beforeBody.concat(tooltip.afterBody), maxLineWidth);\n\n // Body lines may include some extra width due to the color box\n widthPadding = options.displayColors ? (boxWidth + 2 + options.boxPadding) : 0;\n each(body, (bodyItem) => {\n each(bodyItem.before, maxLineWidth);\n each(bodyItem.lines, maxLineWidth);\n each(bodyItem.after, maxLineWidth);\n });\n\n // Reset back to 0\n widthPadding = 0;\n\n // Footer width\n ctx.font = footerFont.string;\n each(tooltip.footer, maxLineWidth);\n\n ctx.restore();\n\n // Add padding\n width += padding.width;\n\n return {width, height};\n}\n\nfunction determineYAlign(chart, size) {\n const {y, height} = size;\n\n if (y < height / 2) {\n return 'top';\n } else if (y > (chart.height - height / 2)) {\n return 'bottom';\n }\n return 'center';\n}\n\nfunction doesNotFitWithAlign(xAlign, chart, options, size) {\n const {x, width} = size;\n const caret = options.caretSize + options.caretPadding;\n if (xAlign === 'left' && x + width + caret > chart.width) {\n return true;\n }\n\n if (xAlign === 'right' && x - width - caret < 0) {\n return true;\n }\n}\n\nfunction determineXAlign(chart, options, size, yAlign) {\n const {x, width} = size;\n const {width: chartWidth, chartArea: {left, right}} = chart;\n let xAlign = 'center';\n\n if (yAlign === 'center') {\n xAlign = x <= (left + right) / 2 ? 'left' : 'right';\n } else if (x <= width / 2) {\n xAlign = 'left';\n } else if (x >= chartWidth - width / 2) {\n xAlign = 'right';\n }\n\n if (doesNotFitWithAlign(xAlign, chart, options, size)) {\n xAlign = 'center';\n }\n\n return xAlign;\n}\n\n/**\n * Helper to get the alignment of a tooltip given the size\n */\nfunction determineAlignment(chart, options, size) {\n const yAlign = size.yAlign || options.yAlign || determineYAlign(chart, size);\n\n return {\n xAlign: size.xAlign || options.xAlign || determineXAlign(chart, options, size, yAlign),\n yAlign\n };\n}\n\nfunction alignX(size, xAlign) {\n let {x, width} = size;\n if (xAlign === 'right') {\n x -= width;\n } else if (xAlign === 'center') {\n x -= (width / 2);\n }\n return x;\n}\n\nfunction alignY(size, yAlign, paddingAndSize) {\n // eslint-disable-next-line prefer-const\n let {y, height} = size;\n if (yAlign === 'top') {\n y += paddingAndSize;\n } else if (yAlign === 'bottom') {\n y -= height + paddingAndSize;\n } else {\n y -= (height / 2);\n }\n return y;\n}\n\n/**\n * Helper to get the location a tooltip needs to be placed at given the initial position (via the vm) and the size and alignment\n */\nfunction getBackgroundPoint(options, size, alignment, chart) {\n const {caretSize, caretPadding, cornerRadius} = options;\n const {xAlign, yAlign} = alignment;\n const paddingAndSize = caretSize + caretPadding;\n const {topLeft, topRight, bottomLeft, bottomRight} = toTRBLCorners(cornerRadius);\n\n let x = alignX(size, xAlign);\n const y = alignY(size, yAlign, paddingAndSize);\n\n if (yAlign === 'center') {\n if (xAlign === 'left') {\n x += paddingAndSize;\n } else if (xAlign === 'right') {\n x -= paddingAndSize;\n }\n } else if (xAlign === 'left') {\n x -= Math.max(topLeft, bottomLeft) + caretSize;\n } else if (xAlign === 'right') {\n x += Math.max(topRight, bottomRight) + caretSize;\n }\n\n return {\n x: _limitValue(x, 0, chart.width - size.width),\n y: _limitValue(y, 0, chart.height - size.height)\n };\n}\n\nfunction getAlignedX(tooltip, align, options) {\n const padding = toPadding(options.padding);\n\n return align === 'center'\n ? tooltip.x + tooltip.width / 2\n : align === 'right'\n ? tooltip.x + tooltip.width - padding.right\n : tooltip.x + padding.left;\n}\n\n/**\n * Helper to build before and after body lines\n */\nfunction getBeforeAfterBodyLines(callback) {\n return pushOrConcat([], splitNewlines(callback));\n}\n\nfunction createTooltipContext(parent, tooltip, tooltipItems) {\n return createContext(parent, {\n tooltip,\n tooltipItems,\n type: 'tooltip'\n });\n}\n\nfunction overrideCallbacks(callbacks, context) {\n const override = context && context.dataset && context.dataset.tooltip && context.dataset.tooltip.callbacks;\n return override ? callbacks.override(override) : callbacks;\n}\n\nconst defaultCallbacks = {\n // Args are: (tooltipItems, data)\n beforeTitle: noop,\n title(tooltipItems) {\n if (tooltipItems.length > 0) {\n const item = tooltipItems[0];\n const labels = item.chart.data.labels;\n const labelCount = labels ? labels.length : 0;\n\n if (this && this.options && this.options.mode === 'dataset') {\n return item.dataset.label || '';\n } else if (item.label) {\n return item.label;\n } else if (labelCount > 0 && item.dataIndex < labelCount) {\n return labels[item.dataIndex];\n }\n }\n\n return '';\n },\n afterTitle: noop,\n\n // Args are: (tooltipItems, data)\n beforeBody: noop,\n\n // Args are: (tooltipItem, data)\n beforeLabel: noop,\n label(tooltipItem) {\n if (this && this.options && this.options.mode === 'dataset') {\n return tooltipItem.label + ': ' + tooltipItem.formattedValue || tooltipItem.formattedValue;\n }\n\n let label = tooltipItem.dataset.label || '';\n\n if (label) {\n label += ': ';\n }\n const value = tooltipItem.formattedValue;\n if (!isNullOrUndef(value)) {\n label += value;\n }\n return label;\n },\n labelColor(tooltipItem) {\n const meta = tooltipItem.chart.getDatasetMeta(tooltipItem.datasetIndex);\n const options = meta.controller.getStyle(tooltipItem.dataIndex);\n return {\n borderColor: options.borderColor,\n backgroundColor: options.backgroundColor,\n borderWidth: options.borderWidth,\n borderDash: options.borderDash,\n borderDashOffset: options.borderDashOffset,\n borderRadius: 0,\n };\n },\n labelTextColor() {\n return this.options.bodyColor;\n },\n labelPointStyle(tooltipItem) {\n const meta = tooltipItem.chart.getDatasetMeta(tooltipItem.datasetIndex);\n const options = meta.controller.getStyle(tooltipItem.dataIndex);\n return {\n pointStyle: options.pointStyle,\n rotation: options.rotation,\n };\n },\n afterLabel: noop,\n\n // Args are: (tooltipItems, data)\n afterBody: noop,\n\n // Args are: (tooltipItems, data)\n beforeFooter: noop,\n footer: noop,\n afterFooter: noop\n};\n\n/**\n * Invoke callback from object with context and arguments.\n * If callback returns `undefined`, then will be invoked default callback.\n * @param {Record} callbacks\n * @param {keyof typeof defaultCallbacks} name\n * @param {*} ctx\n * @param {*} arg\n * @returns {any}\n */\nfunction invokeCallbackWithFallback(callbacks, name, ctx, arg) {\n const result = callbacks[name].call(ctx, arg);\n\n if (typeof result === 'undefined') {\n return defaultCallbacks[name].call(ctx, arg);\n }\n\n return result;\n}\n\nexport class Tooltip extends Element {\n\n /**\n * @namespace Chart.Tooltip.positioners\n */\n static positioners = positioners;\n\n constructor(config) {\n super();\n\n this.opacity = 0;\n this._active = [];\n this._eventPosition = undefined;\n this._size = undefined;\n this._cachedAnimations = undefined;\n this._tooltipItems = [];\n this.$animations = undefined;\n this.$context = undefined;\n this.chart = config.chart;\n this.options = config.options;\n this.dataPoints = undefined;\n this.title = undefined;\n this.beforeBody = undefined;\n this.body = undefined;\n this.afterBody = undefined;\n this.footer = undefined;\n this.xAlign = undefined;\n this.yAlign = undefined;\n this.x = undefined;\n this.y = undefined;\n this.height = undefined;\n this.width = undefined;\n this.caretX = undefined;\n this.caretY = undefined;\n // TODO: V4, make this private, rename to `_labelStyles`, and combine with `labelPointStyles`\n // and `labelTextColors` to create a single variable\n this.labelColors = undefined;\n this.labelPointStyles = undefined;\n this.labelTextColors = undefined;\n }\n\n initialize(options) {\n this.options = options;\n this._cachedAnimations = undefined;\n this.$context = undefined;\n }\n\n /**\n\t * @private\n\t */\n _resolveAnimations() {\n const cached = this._cachedAnimations;\n\n if (cached) {\n return cached;\n }\n\n const chart = this.chart;\n const options = this.options.setContext(this.getContext());\n const opts = options.enabled && chart.options.animation && options.animations;\n const animations = new Animations(this.chart, opts);\n if (opts._cacheable) {\n this._cachedAnimations = Object.freeze(animations);\n }\n\n return animations;\n }\n\n /**\n\t * @protected\n\t */\n getContext() {\n return this.$context ||\n\t\t\t(this.$context = createTooltipContext(this.chart.getContext(), this, this._tooltipItems));\n }\n\n getTitle(context, options) {\n const {callbacks} = options;\n\n const beforeTitle = invokeCallbackWithFallback(callbacks, 'beforeTitle', this, context);\n const title = invokeCallbackWithFallback(callbacks, 'title', this, context);\n const afterTitle = invokeCallbackWithFallback(callbacks, 'afterTitle', this, context);\n\n let lines = [];\n lines = pushOrConcat(lines, splitNewlines(beforeTitle));\n lines = pushOrConcat(lines, splitNewlines(title));\n lines = pushOrConcat(lines, splitNewlines(afterTitle));\n\n return lines;\n }\n\n getBeforeBody(tooltipItems, options) {\n return getBeforeAfterBodyLines(\n invokeCallbackWithFallback(options.callbacks, 'beforeBody', this, tooltipItems)\n );\n }\n\n getBody(tooltipItems, options) {\n const {callbacks} = options;\n const bodyItems = [];\n\n each(tooltipItems, (context) => {\n const bodyItem = {\n before: [],\n lines: [],\n after: []\n };\n const scoped = overrideCallbacks(callbacks, context);\n pushOrConcat(bodyItem.before, splitNewlines(invokeCallbackWithFallback(scoped, 'beforeLabel', this, context)));\n pushOrConcat(bodyItem.lines, invokeCallbackWithFallback(scoped, 'label', this, context));\n pushOrConcat(bodyItem.after, splitNewlines(invokeCallbackWithFallback(scoped, 'afterLabel', this, context)));\n\n bodyItems.push(bodyItem);\n });\n\n return bodyItems;\n }\n\n getAfterBody(tooltipItems, options) {\n return getBeforeAfterBodyLines(\n invokeCallbackWithFallback(options.callbacks, 'afterBody', this, tooltipItems)\n );\n }\n\n // Get the footer and beforeFooter and afterFooter lines\n getFooter(tooltipItems, options) {\n const {callbacks} = options;\n\n const beforeFooter = invokeCallbackWithFallback(callbacks, 'beforeFooter', this, tooltipItems);\n const footer = invokeCallbackWithFallback(callbacks, 'footer', this, tooltipItems);\n const afterFooter = invokeCallbackWithFallback(callbacks, 'afterFooter', this, tooltipItems);\n\n let lines = [];\n lines = pushOrConcat(lines, splitNewlines(beforeFooter));\n lines = pushOrConcat(lines, splitNewlines(footer));\n lines = pushOrConcat(lines, splitNewlines(afterFooter));\n\n return lines;\n }\n\n /**\n\t * @private\n\t */\n _createItems(options) {\n const active = this._active;\n const data = this.chart.data;\n const labelColors = [];\n const labelPointStyles = [];\n const labelTextColors = [];\n let tooltipItems = [];\n let i, len;\n\n for (i = 0, len = active.length; i < len; ++i) {\n tooltipItems.push(createTooltipItem(this.chart, active[i]));\n }\n\n // If the user provided a filter function, use it to modify the tooltip items\n if (options.filter) {\n tooltipItems = tooltipItems.filter((element, index, array) => options.filter(element, index, array, data));\n }\n\n // If the user provided a sorting function, use it to modify the tooltip items\n if (options.itemSort) {\n tooltipItems = tooltipItems.sort((a, b) => options.itemSort(a, b, data));\n }\n\n // Determine colors for boxes\n each(tooltipItems, (context) => {\n const scoped = overrideCallbacks(options.callbacks, context);\n labelColors.push(invokeCallbackWithFallback(scoped, 'labelColor', this, context));\n labelPointStyles.push(invokeCallbackWithFallback(scoped, 'labelPointStyle', this, context));\n labelTextColors.push(invokeCallbackWithFallback(scoped, 'labelTextColor', this, context));\n });\n\n this.labelColors = labelColors;\n this.labelPointStyles = labelPointStyles;\n this.labelTextColors = labelTextColors;\n this.dataPoints = tooltipItems;\n return tooltipItems;\n }\n\n update(changed, replay) {\n const options = this.options.setContext(this.getContext());\n const active = this._active;\n let properties;\n let tooltipItems = [];\n\n if (!active.length) {\n if (this.opacity !== 0) {\n properties = {\n opacity: 0\n };\n }\n } else {\n const position = positioners[options.position].call(this, active, this._eventPosition);\n tooltipItems = this._createItems(options);\n\n this.title = this.getTitle(tooltipItems, options);\n this.beforeBody = this.getBeforeBody(tooltipItems, options);\n this.body = this.getBody(tooltipItems, options);\n this.afterBody = this.getAfterBody(tooltipItems, options);\n this.footer = this.getFooter(tooltipItems, options);\n\n const size = this._size = getTooltipSize(this, options);\n const positionAndSize = Object.assign({}, position, size);\n const alignment = determineAlignment(this.chart, options, positionAndSize);\n const backgroundPoint = getBackgroundPoint(options, positionAndSize, alignment, this.chart);\n\n this.xAlign = alignment.xAlign;\n this.yAlign = alignment.yAlign;\n\n properties = {\n opacity: 1,\n x: backgroundPoint.x,\n y: backgroundPoint.y,\n width: size.width,\n height: size.height,\n caretX: position.x,\n caretY: position.y\n };\n }\n\n this._tooltipItems = tooltipItems;\n this.$context = undefined;\n\n if (properties) {\n this._resolveAnimations().update(this, properties);\n }\n\n if (changed && options.external) {\n options.external.call(this, {chart: this.chart, tooltip: this, replay});\n }\n }\n\n drawCaret(tooltipPoint, ctx, size, options) {\n const caretPosition = this.getCaretPosition(tooltipPoint, size, options);\n\n ctx.lineTo(caretPosition.x1, caretPosition.y1);\n ctx.lineTo(caretPosition.x2, caretPosition.y2);\n ctx.lineTo(caretPosition.x3, caretPosition.y3);\n }\n\n getCaretPosition(tooltipPoint, size, options) {\n const {xAlign, yAlign} = this;\n const {caretSize, cornerRadius} = options;\n const {topLeft, topRight, bottomLeft, bottomRight} = toTRBLCorners(cornerRadius);\n const {x: ptX, y: ptY} = tooltipPoint;\n const {width, height} = size;\n let x1, x2, x3, y1, y2, y3;\n\n if (yAlign === 'center') {\n y2 = ptY + (height / 2);\n\n if (xAlign === 'left') {\n x1 = ptX;\n x2 = x1 - caretSize;\n\n // Left draws bottom -> top, this y1 is on the bottom\n y1 = y2 + caretSize;\n y3 = y2 - caretSize;\n } else {\n x1 = ptX + width;\n x2 = x1 + caretSize;\n\n // Right draws top -> bottom, thus y1 is on the top\n y1 = y2 - caretSize;\n y3 = y2 + caretSize;\n }\n\n x3 = x1;\n } else {\n if (xAlign === 'left') {\n x2 = ptX + Math.max(topLeft, bottomLeft) + (caretSize);\n } else if (xAlign === 'right') {\n x2 = ptX + width - Math.max(topRight, bottomRight) - caretSize;\n } else {\n x2 = this.caretX;\n }\n\n if (yAlign === 'top') {\n y1 = ptY;\n y2 = y1 - caretSize;\n\n // Top draws left -> right, thus x1 is on the left\n x1 = x2 - caretSize;\n x3 = x2 + caretSize;\n } else {\n y1 = ptY + height;\n y2 = y1 + caretSize;\n\n // Bottom draws right -> left, thus x1 is on the right\n x1 = x2 + caretSize;\n x3 = x2 - caretSize;\n }\n y3 = y1;\n }\n return {x1, x2, x3, y1, y2, y3};\n }\n\n drawTitle(pt, ctx, options) {\n const title = this.title;\n const length = title.length;\n let titleFont, titleSpacing, i;\n\n if (length) {\n const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);\n\n pt.x = getAlignedX(this, options.titleAlign, options);\n\n ctx.textAlign = rtlHelper.textAlign(options.titleAlign);\n ctx.textBaseline = 'middle';\n\n titleFont = toFont(options.titleFont);\n titleSpacing = options.titleSpacing;\n\n ctx.fillStyle = options.titleColor;\n ctx.font = titleFont.string;\n\n for (i = 0; i < length; ++i) {\n ctx.fillText(title[i], rtlHelper.x(pt.x), pt.y + titleFont.lineHeight / 2);\n pt.y += titleFont.lineHeight + titleSpacing; // Line Height and spacing\n\n if (i + 1 === length) {\n pt.y += options.titleMarginBottom - titleSpacing; // If Last, add margin, remove spacing\n }\n }\n }\n }\n\n /**\n\t * @private\n\t */\n _drawColorBox(ctx, pt, i, rtlHelper, options) {\n const labelColor = this.labelColors[i];\n const labelPointStyle = this.labelPointStyles[i];\n const {boxHeight, boxWidth} = options;\n const bodyFont = toFont(options.bodyFont);\n const colorX = getAlignedX(this, 'left', options);\n const rtlColorX = rtlHelper.x(colorX);\n const yOffSet = boxHeight < bodyFont.lineHeight ? (bodyFont.lineHeight - boxHeight) / 2 : 0;\n const colorY = pt.y + yOffSet;\n\n if (options.usePointStyle) {\n const drawOptions = {\n radius: Math.min(boxWidth, boxHeight) / 2, // fit the circle in the box\n pointStyle: labelPointStyle.pointStyle,\n rotation: labelPointStyle.rotation,\n borderWidth: 1\n };\n // Recalculate x and y for drawPoint() because its expecting\n // x and y to be center of figure (instead of top left)\n const centerX = rtlHelper.leftForLtr(rtlColorX, boxWidth) + boxWidth / 2;\n const centerY = colorY + boxHeight / 2;\n\n // Fill the point with white so that colours merge nicely if the opacity is < 1\n ctx.strokeStyle = options.multiKeyBackground;\n ctx.fillStyle = options.multiKeyBackground;\n drawPoint(ctx, drawOptions, centerX, centerY);\n\n // Draw the point\n ctx.strokeStyle = labelColor.borderColor;\n ctx.fillStyle = labelColor.backgroundColor;\n drawPoint(ctx, drawOptions, centerX, centerY);\n } else {\n // Border\n ctx.lineWidth = isObject(labelColor.borderWidth) ? Math.max(...Object.values(labelColor.borderWidth)) : (labelColor.borderWidth || 1); // TODO, v4 remove fallback\n ctx.strokeStyle = labelColor.borderColor;\n ctx.setLineDash(labelColor.borderDash || []);\n ctx.lineDashOffset = labelColor.borderDashOffset || 0;\n\n // Fill a white rect so that colours merge nicely if the opacity is < 1\n const outerX = rtlHelper.leftForLtr(rtlColorX, boxWidth);\n const innerX = rtlHelper.leftForLtr(rtlHelper.xPlus(rtlColorX, 1), boxWidth - 2);\n const borderRadius = toTRBLCorners(labelColor.borderRadius);\n\n if (Object.values(borderRadius).some(v => v !== 0)) {\n ctx.beginPath();\n ctx.fillStyle = options.multiKeyBackground;\n addRoundedRectPath(ctx, {\n x: outerX,\n y: colorY,\n w: boxWidth,\n h: boxHeight,\n radius: borderRadius,\n });\n ctx.fill();\n ctx.stroke();\n\n // Inner square\n ctx.fillStyle = labelColor.backgroundColor;\n ctx.beginPath();\n addRoundedRectPath(ctx, {\n x: innerX,\n y: colorY + 1,\n w: boxWidth - 2,\n h: boxHeight - 2,\n radius: borderRadius,\n });\n ctx.fill();\n } else {\n // Normal rect\n ctx.fillStyle = options.multiKeyBackground;\n ctx.fillRect(outerX, colorY, boxWidth, boxHeight);\n ctx.strokeRect(outerX, colorY, boxWidth, boxHeight);\n // Inner square\n ctx.fillStyle = labelColor.backgroundColor;\n ctx.fillRect(innerX, colorY + 1, boxWidth - 2, boxHeight - 2);\n }\n }\n\n // restore fillStyle\n ctx.fillStyle = this.labelTextColors[i];\n }\n\n drawBody(pt, ctx, options) {\n const {body} = this;\n const {bodySpacing, bodyAlign, displayColors, boxHeight, boxWidth, boxPadding} = options;\n const bodyFont = toFont(options.bodyFont);\n let bodyLineHeight = bodyFont.lineHeight;\n let xLinePadding = 0;\n\n const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);\n\n const fillLineOfText = function(line) {\n ctx.fillText(line, rtlHelper.x(pt.x + xLinePadding), pt.y + bodyLineHeight / 2);\n pt.y += bodyLineHeight + bodySpacing;\n };\n\n const bodyAlignForCalculation = rtlHelper.textAlign(bodyAlign);\n let bodyItem, textColor, lines, i, j, ilen, jlen;\n\n ctx.textAlign = bodyAlign;\n ctx.textBaseline = 'middle';\n ctx.font = bodyFont.string;\n\n pt.x = getAlignedX(this, bodyAlignForCalculation, options);\n\n // Before body lines\n ctx.fillStyle = options.bodyColor;\n each(this.beforeBody, fillLineOfText);\n\n xLinePadding = displayColors && bodyAlignForCalculation !== 'right'\n ? bodyAlign === 'center' ? (boxWidth / 2 + boxPadding) : (boxWidth + 2 + boxPadding)\n : 0;\n\n // Draw body lines now\n for (i = 0, ilen = body.length; i < ilen; ++i) {\n bodyItem = body[i];\n textColor = this.labelTextColors[i];\n\n ctx.fillStyle = textColor;\n each(bodyItem.before, fillLineOfText);\n\n lines = bodyItem.lines;\n // Draw Legend-like boxes if needed\n if (displayColors && lines.length) {\n this._drawColorBox(ctx, pt, i, rtlHelper, options);\n bodyLineHeight = Math.max(bodyFont.lineHeight, boxHeight);\n }\n\n for (j = 0, jlen = lines.length; j < jlen; ++j) {\n fillLineOfText(lines[j]);\n // Reset for any lines that don't include colorbox\n bodyLineHeight = bodyFont.lineHeight;\n }\n\n each(bodyItem.after, fillLineOfText);\n }\n\n // Reset back to 0 for after body\n xLinePadding = 0;\n bodyLineHeight = bodyFont.lineHeight;\n\n // After body lines\n each(this.afterBody, fillLineOfText);\n pt.y -= bodySpacing; // Remove last body spacing\n }\n\n drawFooter(pt, ctx, options) {\n const footer = this.footer;\n const length = footer.length;\n let footerFont, i;\n\n if (length) {\n const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);\n\n pt.x = getAlignedX(this, options.footerAlign, options);\n pt.y += options.footerMarginTop;\n\n ctx.textAlign = rtlHelper.textAlign(options.footerAlign);\n ctx.textBaseline = 'middle';\n\n footerFont = toFont(options.footerFont);\n\n ctx.fillStyle = options.footerColor;\n ctx.font = footerFont.string;\n\n for (i = 0; i < length; ++i) {\n ctx.fillText(footer[i], rtlHelper.x(pt.x), pt.y + footerFont.lineHeight / 2);\n pt.y += footerFont.lineHeight + options.footerSpacing;\n }\n }\n }\n\n drawBackground(pt, ctx, tooltipSize, options) {\n const {xAlign, yAlign} = this;\n const {x, y} = pt;\n const {width, height} = tooltipSize;\n const {topLeft, topRight, bottomLeft, bottomRight} = toTRBLCorners(options.cornerRadius);\n\n ctx.fillStyle = options.backgroundColor;\n ctx.strokeStyle = options.borderColor;\n ctx.lineWidth = options.borderWidth;\n\n ctx.beginPath();\n ctx.moveTo(x + topLeft, y);\n if (yAlign === 'top') {\n this.drawCaret(pt, ctx, tooltipSize, options);\n }\n ctx.lineTo(x + width - topRight, y);\n ctx.quadraticCurveTo(x + width, y, x + width, y + topRight);\n if (yAlign === 'center' && xAlign === 'right') {\n this.drawCaret(pt, ctx, tooltipSize, options);\n }\n ctx.lineTo(x + width, y + height - bottomRight);\n ctx.quadraticCurveTo(x + width, y + height, x + width - bottomRight, y + height);\n if (yAlign === 'bottom') {\n this.drawCaret(pt, ctx, tooltipSize, options);\n }\n ctx.lineTo(x + bottomLeft, y + height);\n ctx.quadraticCurveTo(x, y + height, x, y + height - bottomLeft);\n if (yAlign === 'center' && xAlign === 'left') {\n this.drawCaret(pt, ctx, tooltipSize, options);\n }\n ctx.lineTo(x, y + topLeft);\n ctx.quadraticCurveTo(x, y, x + topLeft, y);\n ctx.closePath();\n\n ctx.fill();\n\n if (options.borderWidth > 0) {\n ctx.stroke();\n }\n }\n\n /**\n\t * Update x/y animation targets when _active elements are animating too\n\t * @private\n\t */\n _updateAnimationTarget(options) {\n const chart = this.chart;\n const anims = this.$animations;\n const animX = anims && anims.x;\n const animY = anims && anims.y;\n if (animX || animY) {\n const position = positioners[options.position].call(this, this._active, this._eventPosition);\n if (!position) {\n return;\n }\n const size = this._size = getTooltipSize(this, options);\n const positionAndSize = Object.assign({}, position, this._size);\n const alignment = determineAlignment(chart, options, positionAndSize);\n const point = getBackgroundPoint(options, positionAndSize, alignment, chart);\n if (animX._to !== point.x || animY._to !== point.y) {\n this.xAlign = alignment.xAlign;\n this.yAlign = alignment.yAlign;\n this.width = size.width;\n this.height = size.height;\n this.caretX = position.x;\n this.caretY = position.y;\n this._resolveAnimations().update(this, point);\n }\n }\n }\n\n /**\n * Determine if the tooltip will draw anything\n * @returns {boolean} True if the tooltip will render\n */\n _willRender() {\n return !!this.opacity;\n }\n\n draw(ctx) {\n const options = this.options.setContext(this.getContext());\n let opacity = this.opacity;\n\n if (!opacity) {\n return;\n }\n\n this._updateAnimationTarget(options);\n\n const tooltipSize = {\n width: this.width,\n height: this.height\n };\n const pt = {\n x: this.x,\n y: this.y\n };\n\n // IE11/Edge does not like very small opacities, so snap to 0\n opacity = Math.abs(opacity) < 1e-3 ? 0 : opacity;\n\n const padding = toPadding(options.padding);\n\n // Truthy/falsey value for empty tooltip\n const hasTooltipContent = this.title.length || this.beforeBody.length || this.body.length || this.afterBody.length || this.footer.length;\n\n if (options.enabled && hasTooltipContent) {\n ctx.save();\n ctx.globalAlpha = opacity;\n\n // Draw Background\n this.drawBackground(pt, ctx, tooltipSize, options);\n\n overrideTextDirection(ctx, options.textDirection);\n\n pt.y += padding.top;\n\n // Titles\n this.drawTitle(pt, ctx, options);\n\n // Body\n this.drawBody(pt, ctx, options);\n\n // Footer\n this.drawFooter(pt, ctx, options);\n\n restoreTextDirection(ctx, options.textDirection);\n\n ctx.restore();\n }\n }\n\n /**\n\t * Get active elements in the tooltip\n\t * @returns {Array} Array of elements that are active in the tooltip\n\t */\n getActiveElements() {\n return this._active || [];\n }\n\n /**\n\t * Set active elements in the tooltip\n\t * @param {array} activeElements Array of active datasetIndex/index pairs.\n\t * @param {object} eventPosition Synthetic event position used in positioning\n\t */\n setActiveElements(activeElements, eventPosition) {\n const lastActive = this._active;\n const active = activeElements.map(({datasetIndex, index}) => {\n const meta = this.chart.getDatasetMeta(datasetIndex);\n\n if (!meta) {\n throw new Error('Cannot find a dataset at index ' + datasetIndex);\n }\n\n return {\n datasetIndex,\n element: meta.data[index],\n index,\n };\n });\n const changed = !_elementsEqual(lastActive, active);\n const positionChanged = this._positionChanged(active, eventPosition);\n\n if (changed || positionChanged) {\n this._active = active;\n this._eventPosition = eventPosition;\n this._ignoreReplayEvents = true;\n this.update(true);\n }\n }\n\n /**\n\t * Handle an event\n\t * @param {ChartEvent} e - The event to handle\n\t * @param {boolean} [replay] - This is a replayed event (from update)\n\t * @param {boolean} [inChartArea] - The event is inside chartArea\n\t * @returns {boolean} true if the tooltip changed\n\t */\n handleEvent(e, replay, inChartArea = true) {\n if (replay && this._ignoreReplayEvents) {\n return false;\n }\n this._ignoreReplayEvents = false;\n\n const options = this.options;\n const lastActive = this._active || [];\n const active = this._getActiveElements(e, lastActive, replay, inChartArea);\n\n // When there are multiple items shown, but the tooltip position is nearest mode\n // an update may need to be made because our position may have changed even though\n // the items are the same as before.\n const positionChanged = this._positionChanged(active, e);\n\n // Remember Last Actives\n const changed = replay || !_elementsEqual(active, lastActive) || positionChanged;\n\n // Only handle target event on tooltip change\n if (changed) {\n this._active = active;\n\n if (options.enabled || options.external) {\n this._eventPosition = {\n x: e.x,\n y: e.y\n };\n\n this.update(true, replay);\n }\n }\n\n return changed;\n }\n\n /**\n\t * Helper for determining the active elements for event\n\t * @param {ChartEvent} e - The event to handle\n\t * @param {InteractionItem[]} lastActive - Previously active elements\n\t * @param {boolean} [replay] - This is a replayed event (from update)\n\t * @param {boolean} [inChartArea] - The event is inside chartArea\n\t * @returns {InteractionItem[]} - Active elements\n\t * @private\n\t */\n _getActiveElements(e, lastActive, replay, inChartArea) {\n const options = this.options;\n\n if (e.type === 'mouseout') {\n return [];\n }\n\n if (!inChartArea) {\n // Let user control the active elements outside chartArea. Eg. using Legend.\n // But make sure that active elements are still valid.\n return lastActive.filter(i =>\n this.chart.data.datasets[i.datasetIndex] &&\n this.chart.getDatasetMeta(i.datasetIndex).controller.getParsed(i.index) !== undefined\n );\n }\n\n // Find Active Elements for tooltips\n const active = this.chart.getElementsAtEventForMode(e, options.mode, options, replay);\n\n if (options.reverse) {\n active.reverse();\n }\n\n return active;\n }\n\n /**\n\t * Determine if the active elements + event combination changes the\n\t * tooltip position\n\t * @param {array} active - Active elements\n\t * @param {ChartEvent} e - Event that triggered the position change\n\t * @returns {boolean} True if the position has changed\n\t */\n _positionChanged(active, e) {\n const {caretX, caretY, options} = this;\n const position = positioners[options.position].call(this, active, e);\n return position !== false && (caretX !== position.x || caretY !== position.y);\n }\n}\n\nexport default {\n id: 'tooltip',\n _element: Tooltip,\n positioners,\n\n afterInit(chart, _args, options) {\n if (options) {\n chart.tooltip = new Tooltip({chart, options});\n }\n },\n\n beforeUpdate(chart, _args, options) {\n if (chart.tooltip) {\n chart.tooltip.initialize(options);\n }\n },\n\n reset(chart, _args, options) {\n if (chart.tooltip) {\n chart.tooltip.initialize(options);\n }\n },\n\n afterDraw(chart) {\n const tooltip = chart.tooltip;\n\n if (tooltip && tooltip._willRender()) {\n const args = {\n tooltip\n };\n\n if (chart.notifyPlugins('beforeTooltipDraw', {...args, cancelable: true}) === false) {\n return;\n }\n\n tooltip.draw(chart.ctx);\n\n chart.notifyPlugins('afterTooltipDraw', args);\n }\n },\n\n afterEvent(chart, args) {\n if (chart.tooltip) {\n // If the event is replayed from `update`, we should evaluate with the final positions.\n const useFinalPosition = args.replay;\n if (chart.tooltip.handleEvent(args.event, useFinalPosition, args.inChartArea)) {\n // notify chart about the change, so it will render\n args.changed = true;\n }\n }\n },\n\n defaults: {\n enabled: true,\n external: null,\n position: 'average',\n backgroundColor: 'rgba(0,0,0,0.8)',\n titleColor: '#fff',\n titleFont: {\n weight: 'bold',\n },\n titleSpacing: 2,\n titleMarginBottom: 6,\n titleAlign: 'left',\n bodyColor: '#fff',\n bodySpacing: 2,\n bodyFont: {\n },\n bodyAlign: 'left',\n footerColor: '#fff',\n footerSpacing: 2,\n footerMarginTop: 6,\n footerFont: {\n weight: 'bold',\n },\n footerAlign: 'left',\n padding: 6,\n caretPadding: 2,\n caretSize: 5,\n cornerRadius: 6,\n boxHeight: (ctx, opts) => opts.bodyFont.size,\n boxWidth: (ctx, opts) => opts.bodyFont.size,\n multiKeyBackground: '#fff',\n displayColors: true,\n boxPadding: 0,\n borderColor: 'rgba(0,0,0,0)',\n borderWidth: 0,\n animation: {\n duration: 400,\n easing: 'easeOutQuart',\n },\n animations: {\n numbers: {\n type: 'number',\n properties: ['x', 'y', 'width', 'height', 'caretX', 'caretY'],\n },\n opacity: {\n easing: 'linear',\n duration: 200\n }\n },\n callbacks: defaultCallbacks\n },\n\n defaultRoutes: {\n bodyFont: 'font',\n footerFont: 'font',\n titleFont: 'font'\n },\n\n descriptors: {\n _scriptable: (name) => name !== 'filter' && name !== 'itemSort' && name !== 'external',\n _indexable: false,\n callbacks: {\n _scriptable: false,\n _indexable: false,\n },\n animation: {\n _fallback: false\n },\n animations: {\n _fallback: 'animation'\n }\n },\n\n // Resolve additionally from `interaction` options and defaults.\n additionalOptionScopes: ['interaction']\n};\n","import Scale from '../core/core.scale.js';\nimport {isNullOrUndef, valueOrDefault, _limitValue} from '../helpers/index.js';\n\nconst addIfString = (labels, raw, index, addedLabels) => {\n if (typeof raw === 'string') {\n index = labels.push(raw) - 1;\n addedLabels.unshift({index, label: raw});\n } else if (isNaN(raw)) {\n index = null;\n }\n return index;\n};\n\nfunction findOrAddLabel(labels, raw, index, addedLabels) {\n const first = labels.indexOf(raw);\n if (first === -1) {\n return addIfString(labels, raw, index, addedLabels);\n }\n const last = labels.lastIndexOf(raw);\n return first !== last ? index : first;\n}\n\nconst validIndex = (index, max) => index === null ? null : _limitValue(Math.round(index), 0, max);\n\nfunction _getLabelForValue(value) {\n const labels = this.getLabels();\n\n if (value >= 0 && value < labels.length) {\n return labels[value];\n }\n return value;\n}\n\nexport default class CategoryScale extends Scale {\n\n static id = 'category';\n\n /**\n * @type {any}\n */\n static defaults = {\n ticks: {\n callback: _getLabelForValue\n }\n };\n\n constructor(cfg) {\n super(cfg);\n\n /** @type {number} */\n this._startValue = undefined;\n this._valueRange = 0;\n this._addedLabels = [];\n }\n\n init(scaleOptions) {\n const added = this._addedLabels;\n if (added.length) {\n const labels = this.getLabels();\n for (const {index, label} of added) {\n if (labels[index] === label) {\n labels.splice(index, 1);\n }\n }\n this._addedLabels = [];\n }\n super.init(scaleOptions);\n }\n\n parse(raw, index) {\n if (isNullOrUndef(raw)) {\n return null;\n }\n const labels = this.getLabels();\n index = isFinite(index) && labels[index] === raw ? index\n : findOrAddLabel(labels, raw, valueOrDefault(index, raw), this._addedLabels);\n return validIndex(index, labels.length - 1);\n }\n\n determineDataLimits() {\n const {minDefined, maxDefined} = this.getUserBounds();\n let {min, max} = this.getMinMax(true);\n\n if (this.options.bounds === 'ticks') {\n if (!minDefined) {\n min = 0;\n }\n if (!maxDefined) {\n max = this.getLabels().length - 1;\n }\n }\n\n this.min = min;\n this.max = max;\n }\n\n buildTicks() {\n const min = this.min;\n const max = this.max;\n const offset = this.options.offset;\n const ticks = [];\n let labels = this.getLabels();\n\n // If we are viewing some subset of labels, slice the original array\n labels = (min === 0 && max === labels.length - 1) ? labels : labels.slice(min, max + 1);\n\n this._valueRange = Math.max(labels.length - (offset ? 0 : 1), 1);\n this._startValue = this.min - (offset ? 0.5 : 0);\n\n for (let value = min; value <= max; value++) {\n ticks.push({value});\n }\n return ticks;\n }\n\n getLabelForValue(value) {\n return _getLabelForValue.call(this, value);\n }\n\n /**\n\t * @protected\n\t */\n configure() {\n super.configure();\n\n if (!this.isHorizontal()) {\n // For backward compatibility, vertical category scale reverse is inverted.\n this._reversePixels = !this._reversePixels;\n }\n }\n\n // Used to get data value locations. Value can either be an index or a numerical value\n getPixelForValue(value) {\n if (typeof value !== 'number') {\n value = this.parse(value);\n }\n\n return value === null ? NaN : this.getPixelForDecimal((value - this._startValue) / this._valueRange);\n }\n\n // Must override base implementation because it calls getPixelForValue\n // and category scale can have duplicate values\n getPixelForTick(index) {\n const ticks = this.ticks;\n if (index < 0 || index > ticks.length - 1) {\n return null;\n }\n return this.getPixelForValue(ticks[index].value);\n }\n\n getValueForPixel(pixel) {\n return Math.round(this._startValue + this.getDecimalForPixel(pixel) * this._valueRange);\n }\n\n getBasePixel() {\n return this.bottom;\n }\n}\n","import {isNullOrUndef} from '../helpers/helpers.core.js';\nimport {almostEquals, almostWhole, niceNum, _decimalPlaces, _setMinAndMaxByKey, sign, toRadians} from '../helpers/helpers.math.js';\nimport Scale from '../core/core.scale.js';\nimport {formatNumber} from '../helpers/helpers.intl.js';\n\n/**\n * Generate a set of linear ticks for an axis\n * 1. If generationOptions.min, generationOptions.max, and generationOptions.step are defined:\n * if (max - min) / step is an integer, ticks are generated as [min, min + step, ..., max]\n * Note that the generationOptions.maxCount setting is respected in this scenario\n *\n * 2. If generationOptions.min, generationOptions.max, and generationOptions.count is defined\n * spacing = (max - min) / count\n * Ticks are generated as [min, min + spacing, ..., max]\n *\n * 3. If generationOptions.count is defined\n * spacing = (niceMax - niceMin) / count\n *\n * 4. Compute optimal spacing of ticks using niceNum algorithm\n *\n * @param generationOptions the options used to generate the ticks\n * @param dataRange the range of the data\n * @returns {object[]} array of tick objects\n */\nfunction generateTicks(generationOptions, dataRange) {\n const ticks = [];\n // To get a \"nice\" value for the tick spacing, we will use the appropriately named\n // \"nice number\" algorithm. See https://stackoverflow.com/questions/8506881/nice-label-algorithm-for-charts-with-minimum-ticks\n // for details.\n\n const MIN_SPACING = 1e-14;\n const {bounds, step, min, max, precision, count, maxTicks, maxDigits, includeBounds} = generationOptions;\n const unit = step || 1;\n const maxSpaces = maxTicks - 1;\n const {min: rmin, max: rmax} = dataRange;\n const minDefined = !isNullOrUndef(min);\n const maxDefined = !isNullOrUndef(max);\n const countDefined = !isNullOrUndef(count);\n const minSpacing = (rmax - rmin) / (maxDigits + 1);\n let spacing = niceNum((rmax - rmin) / maxSpaces / unit) * unit;\n let factor, niceMin, niceMax, numSpaces;\n\n // Beyond MIN_SPACING floating point numbers being to lose precision\n // such that we can't do the math necessary to generate ticks\n if (spacing < MIN_SPACING && !minDefined && !maxDefined) {\n return [{value: rmin}, {value: rmax}];\n }\n\n numSpaces = Math.ceil(rmax / spacing) - Math.floor(rmin / spacing);\n if (numSpaces > maxSpaces) {\n // If the calculated num of spaces exceeds maxNumSpaces, recalculate it\n spacing = niceNum(numSpaces * spacing / maxSpaces / unit) * unit;\n }\n\n if (!isNullOrUndef(precision)) {\n // If the user specified a precision, round to that number of decimal places\n factor = Math.pow(10, precision);\n spacing = Math.ceil(spacing * factor) / factor;\n }\n\n if (bounds === 'ticks') {\n niceMin = Math.floor(rmin / spacing) * spacing;\n niceMax = Math.ceil(rmax / spacing) * spacing;\n } else {\n niceMin = rmin;\n niceMax = rmax;\n }\n\n if (minDefined && maxDefined && step && almostWhole((max - min) / step, spacing / 1000)) {\n // Case 1: If min, max and stepSize are set and they make an evenly spaced scale use it.\n // spacing = step;\n // numSpaces = (max - min) / spacing;\n // Note that we round here to handle the case where almostWhole translated an FP error\n numSpaces = Math.round(Math.min((max - min) / spacing, maxTicks));\n spacing = (max - min) / numSpaces;\n niceMin = min;\n niceMax = max;\n } else if (countDefined) {\n // Cases 2 & 3, we have a count specified. Handle optional user defined edges to the range.\n // Sometimes these are no-ops, but it makes the code a lot clearer\n // and when a user defined range is specified, we want the correct ticks\n niceMin = minDefined ? min : niceMin;\n niceMax = maxDefined ? max : niceMax;\n numSpaces = count - 1;\n spacing = (niceMax - niceMin) / numSpaces;\n } else {\n // Case 4\n numSpaces = (niceMax - niceMin) / spacing;\n\n // If very close to our rounded value, use it.\n if (almostEquals(numSpaces, Math.round(numSpaces), spacing / 1000)) {\n numSpaces = Math.round(numSpaces);\n } else {\n numSpaces = Math.ceil(numSpaces);\n }\n }\n\n // The spacing will have changed in cases 1, 2, and 3 so the factor cannot be computed\n // until this point\n const decimalPlaces = Math.max(\n _decimalPlaces(spacing),\n _decimalPlaces(niceMin)\n );\n factor = Math.pow(10, isNullOrUndef(precision) ? decimalPlaces : precision);\n niceMin = Math.round(niceMin * factor) / factor;\n niceMax = Math.round(niceMax * factor) / factor;\n\n let j = 0;\n if (minDefined) {\n if (includeBounds && niceMin !== min) {\n ticks.push({value: min});\n\n if (niceMin < min) {\n j++; // Skip niceMin\n }\n // If the next nice tick is close to min, skip it\n if (almostEquals(Math.round((niceMin + j * spacing) * factor) / factor, min, relativeLabelSize(min, minSpacing, generationOptions))) {\n j++;\n }\n } else if (niceMin < min) {\n j++;\n }\n }\n\n for (; j < numSpaces; ++j) {\n const tickValue = Math.round((niceMin + j * spacing) * factor) / factor;\n if (maxDefined && tickValue > max) {\n break;\n }\n ticks.push({value: tickValue});\n }\n\n if (maxDefined && includeBounds && niceMax !== max) {\n // If the previous tick is too close to max, replace it with max, else add max\n if (ticks.length && almostEquals(ticks[ticks.length - 1].value, max, relativeLabelSize(max, minSpacing, generationOptions))) {\n ticks[ticks.length - 1].value = max;\n } else {\n ticks.push({value: max});\n }\n } else if (!maxDefined || niceMax === max) {\n ticks.push({value: niceMax});\n }\n\n return ticks;\n}\n\nfunction relativeLabelSize(value, minSpacing, {horizontal, minRotation}) {\n const rad = toRadians(minRotation);\n const ratio = (horizontal ? Math.sin(rad) : Math.cos(rad)) || 0.001;\n const length = 0.75 * minSpacing * ('' + value).length;\n return Math.min(minSpacing / ratio, length);\n}\n\nexport default class LinearScaleBase extends Scale {\n\n constructor(cfg) {\n super(cfg);\n\n /** @type {number} */\n this.start = undefined;\n /** @type {number} */\n this.end = undefined;\n /** @type {number} */\n this._startValue = undefined;\n /** @type {number} */\n this._endValue = undefined;\n this._valueRange = 0;\n }\n\n parse(raw, index) { // eslint-disable-line no-unused-vars\n if (isNullOrUndef(raw)) {\n return null;\n }\n if ((typeof raw === 'number' || raw instanceof Number) && !isFinite(+raw)) {\n return null;\n }\n\n return +raw;\n }\n\n handleTickRangeOptions() {\n const {beginAtZero} = this.options;\n const {minDefined, maxDefined} = this.getUserBounds();\n let {min, max} = this;\n\n const setMin = v => (min = minDefined ? min : v);\n const setMax = v => (max = maxDefined ? max : v);\n\n if (beginAtZero) {\n const minSign = sign(min);\n const maxSign = sign(max);\n\n if (minSign < 0 && maxSign < 0) {\n setMax(0);\n } else if (minSign > 0 && maxSign > 0) {\n setMin(0);\n }\n }\n\n if (min === max) {\n let offset = max === 0 ? 1 : Math.abs(max * 0.05);\n\n setMax(max + offset);\n\n if (!beginAtZero) {\n setMin(min - offset);\n }\n }\n this.min = min;\n this.max = max;\n }\n\n getTickLimit() {\n const tickOpts = this.options.ticks;\n // eslint-disable-next-line prefer-const\n let {maxTicksLimit, stepSize} = tickOpts;\n let maxTicks;\n\n if (stepSize) {\n maxTicks = Math.ceil(this.max / stepSize) - Math.floor(this.min / stepSize) + 1;\n if (maxTicks > 1000) {\n console.warn(`scales.${this.id}.ticks.stepSize: ${stepSize} would result generating up to ${maxTicks} ticks. Limiting to 1000.`);\n maxTicks = 1000;\n }\n } else {\n maxTicks = this.computeTickLimit();\n maxTicksLimit = maxTicksLimit || 11;\n }\n\n if (maxTicksLimit) {\n maxTicks = Math.min(maxTicksLimit, maxTicks);\n }\n\n return maxTicks;\n }\n\n /**\n\t * @protected\n\t */\n computeTickLimit() {\n return Number.POSITIVE_INFINITY;\n }\n\n buildTicks() {\n const opts = this.options;\n const tickOpts = opts.ticks;\n\n // Figure out what the max number of ticks we can support it is based on the size of\n // the axis area. For now, we say that the minimum tick spacing in pixels must be 40\n // We also limit the maximum number of ticks to 11 which gives a nice 10 squares on\n // the graph. Make sure we always have at least 2 ticks\n let maxTicks = this.getTickLimit();\n maxTicks = Math.max(2, maxTicks);\n\n const numericGeneratorOptions = {\n maxTicks,\n bounds: opts.bounds,\n min: opts.min,\n max: opts.max,\n precision: tickOpts.precision,\n step: tickOpts.stepSize,\n count: tickOpts.count,\n maxDigits: this._maxDigits(),\n horizontal: this.isHorizontal(),\n minRotation: tickOpts.minRotation || 0,\n includeBounds: tickOpts.includeBounds !== false\n };\n const dataRange = this._range || this;\n const ticks = generateTicks(numericGeneratorOptions, dataRange);\n\n // At this point, we need to update our max and min given the tick values,\n // since we probably have expanded the range of the scale\n if (opts.bounds === 'ticks') {\n _setMinAndMaxByKey(ticks, this, 'value');\n }\n\n if (opts.reverse) {\n ticks.reverse();\n\n this.start = this.max;\n this.end = this.min;\n } else {\n this.start = this.min;\n this.end = this.max;\n }\n\n return ticks;\n }\n\n /**\n\t * @protected\n\t */\n configure() {\n const ticks = this.ticks;\n let start = this.min;\n let end = this.max;\n\n super.configure();\n\n if (this.options.offset && ticks.length) {\n const offset = (end - start) / Math.max(ticks.length - 1, 1) / 2;\n start -= offset;\n end += offset;\n }\n this._startValue = start;\n this._endValue = end;\n this._valueRange = end - start;\n }\n\n getLabelForValue(value) {\n return formatNumber(value, this.chart.options.locale, this.options.ticks.format);\n }\n}\n","import {isFinite} from '../helpers/helpers.core.js';\nimport LinearScaleBase from './scale.linearbase.js';\nimport Ticks from '../core/core.ticks.js';\nimport {toRadians} from '../helpers/index.js';\n\nexport default class LinearScale extends LinearScaleBase {\n\n static id = 'linear';\n\n /**\n * @type {any}\n */\n static defaults = {\n ticks: {\n callback: Ticks.formatters.numeric\n }\n };\n\n\n determineDataLimits() {\n const {min, max} = this.getMinMax(true);\n\n this.min = isFinite(min) ? min : 0;\n this.max = isFinite(max) ? max : 1;\n\n // Common base implementation to handle min, max, beginAtZero\n this.handleTickRangeOptions();\n }\n\n /**\n\t * Returns the maximum number of ticks based on the scale dimension\n\t * @protected\n \t */\n computeTickLimit() {\n const horizontal = this.isHorizontal();\n const length = horizontal ? this.width : this.height;\n const minRotation = toRadians(this.options.ticks.minRotation);\n const ratio = (horizontal ? Math.sin(minRotation) : Math.cos(minRotation)) || 0.001;\n const tickFont = this._resolveTickFontOptions(0);\n return Math.ceil(length / Math.min(40, tickFont.lineHeight / ratio));\n }\n\n // Utils\n getPixelForValue(value) {\n return value === null ? NaN : this.getPixelForDecimal((value - this._startValue) / this._valueRange);\n }\n\n getValueForPixel(pixel) {\n return this._startValue + this.getDecimalForPixel(pixel) * this._valueRange;\n }\n}\n","import {finiteOrDefault, isFinite} from '../helpers/helpers.core.js';\nimport {formatNumber} from '../helpers/helpers.intl.js';\nimport {_setMinAndMaxByKey, log10} from '../helpers/helpers.math.js';\nimport Scale from '../core/core.scale.js';\nimport LinearScaleBase from './scale.linearbase.js';\nimport Ticks from '../core/core.ticks.js';\n\nconst log10Floor = v => Math.floor(log10(v));\nconst changeExponent = (v, m) => Math.pow(10, log10Floor(v) + m);\n\nfunction isMajor(tickVal) {\n const remain = tickVal / (Math.pow(10, log10Floor(tickVal)));\n return remain === 1;\n}\n\nfunction steps(min, max, rangeExp) {\n const rangeStep = Math.pow(10, rangeExp);\n const start = Math.floor(min / rangeStep);\n const end = Math.ceil(max / rangeStep);\n return end - start;\n}\n\nfunction startExp(min, max) {\n const range = max - min;\n let rangeExp = log10Floor(range);\n while (steps(min, max, rangeExp) > 10) {\n rangeExp++;\n }\n while (steps(min, max, rangeExp) < 10) {\n rangeExp--;\n }\n return Math.min(rangeExp, log10Floor(min));\n}\n\n\n/**\n * Generate a set of logarithmic ticks\n * @param generationOptions the options used to generate the ticks\n * @param dataRange the range of the data\n * @returns {object[]} array of tick objects\n */\nfunction generateTicks(generationOptions, {min, max}) {\n min = finiteOrDefault(generationOptions.min, min);\n const ticks = [];\n const minExp = log10Floor(min);\n let exp = startExp(min, max);\n let precision = exp < 0 ? Math.pow(10, Math.abs(exp)) : 1;\n const stepSize = Math.pow(10, exp);\n const base = minExp > exp ? Math.pow(10, minExp) : 0;\n const start = Math.round((min - base) * precision) / precision;\n const offset = Math.floor((min - base) / stepSize / 10) * stepSize * 10;\n let significand = Math.floor((start - offset) / Math.pow(10, exp));\n let value = finiteOrDefault(generationOptions.min, Math.round((base + offset + significand * Math.pow(10, exp)) * precision) / precision);\n while (value < max) {\n ticks.push({value, major: isMajor(value), significand});\n if (significand >= 10) {\n significand = significand < 15 ? 15 : 20;\n } else {\n significand++;\n }\n if (significand >= 20) {\n exp++;\n significand = 2;\n precision = exp >= 0 ? 1 : precision;\n }\n value = Math.round((base + offset + significand * Math.pow(10, exp)) * precision) / precision;\n }\n const lastTick = finiteOrDefault(generationOptions.max, value);\n ticks.push({value: lastTick, major: isMajor(lastTick), significand});\n\n return ticks;\n}\n\nexport default class LogarithmicScale extends Scale {\n\n static id = 'logarithmic';\n\n /**\n * @type {any}\n */\n static defaults = {\n ticks: {\n callback: Ticks.formatters.logarithmic,\n major: {\n enabled: true\n }\n }\n };\n\n\n constructor(cfg) {\n super(cfg);\n\n /** @type {number} */\n this.start = undefined;\n /** @type {number} */\n this.end = undefined;\n /** @type {number} */\n this._startValue = undefined;\n this._valueRange = 0;\n }\n\n parse(raw, index) {\n const value = LinearScaleBase.prototype.parse.apply(this, [raw, index]);\n if (value === 0) {\n this._zero = true;\n return undefined;\n }\n return isFinite(value) && value > 0 ? value : null;\n }\n\n determineDataLimits() {\n const {min, max} = this.getMinMax(true);\n\n this.min = isFinite(min) ? Math.max(0, min) : null;\n this.max = isFinite(max) ? Math.max(0, max) : null;\n\n if (this.options.beginAtZero) {\n this._zero = true;\n }\n\n // if data has `0` in it or `beginAtZero` is true, min (non zero) value is at bottom\n // of scale, and it does not equal suggestedMin, lower the min bound by one exp.\n if (this._zero && this.min !== this._suggestedMin && !isFinite(this._userMin)) {\n this.min = min === changeExponent(this.min, 0) ? changeExponent(this.min, -1) : changeExponent(this.min, 0);\n }\n\n this.handleTickRangeOptions();\n }\n\n handleTickRangeOptions() {\n const {minDefined, maxDefined} = this.getUserBounds();\n let min = this.min;\n let max = this.max;\n\n const setMin = v => (min = minDefined ? min : v);\n const setMax = v => (max = maxDefined ? max : v);\n\n if (min === max) {\n if (min <= 0) { // includes null\n setMin(1);\n setMax(10);\n } else {\n setMin(changeExponent(min, -1));\n setMax(changeExponent(max, +1));\n }\n }\n if (min <= 0) {\n setMin(changeExponent(max, -1));\n }\n if (max <= 0) {\n\n setMax(changeExponent(min, +1));\n }\n\n this.min = min;\n this.max = max;\n }\n\n buildTicks() {\n const opts = this.options;\n\n const generationOptions = {\n min: this._userMin,\n max: this._userMax\n };\n const ticks = generateTicks(generationOptions, this);\n\n // At this point, we need to update our max and min given the tick values,\n // since we probably have expanded the range of the scale\n if (opts.bounds === 'ticks') {\n _setMinAndMaxByKey(ticks, this, 'value');\n }\n\n if (opts.reverse) {\n ticks.reverse();\n\n this.start = this.max;\n this.end = this.min;\n } else {\n this.start = this.min;\n this.end = this.max;\n }\n\n return ticks;\n }\n\n /**\n\t * @param {number} value\n\t * @return {string}\n\t */\n getLabelForValue(value) {\n return value === undefined\n ? '0'\n : formatNumber(value, this.chart.options.locale, this.options.ticks.format);\n }\n\n /**\n\t * @protected\n\t */\n configure() {\n const start = this.min;\n\n super.configure();\n\n this._startValue = log10(start);\n this._valueRange = log10(this.max) - log10(start);\n }\n\n getPixelForValue(value) {\n if (value === undefined || value === 0) {\n value = this.min;\n }\n if (value === null || isNaN(value)) {\n return NaN;\n }\n return this.getPixelForDecimal(value === this.min\n ? 0\n : (log10(value) - this._startValue) / this._valueRange);\n }\n\n getValueForPixel(pixel) {\n const decimal = this.getDecimalForPixel(pixel);\n return Math.pow(10, this._startValue + decimal * this._valueRange);\n }\n}\n","import defaults from '../core/core.defaults.js';\nimport {_longestText, addRoundedRectPath, renderText, _isPointInArea} from '../helpers/helpers.canvas.js';\nimport {HALF_PI, TAU, toDegrees, toRadians, _normalizeAngle, PI} from '../helpers/helpers.math.js';\nimport LinearScaleBase from './scale.linearbase.js';\nimport Ticks from '../core/core.ticks.js';\nimport {valueOrDefault, isArray, isFinite, callback as callCallback, isNullOrUndef} from '../helpers/helpers.core.js';\nimport {createContext, toFont, toPadding, toTRBLCorners} from '../helpers/helpers.options.js';\n\nfunction getTickBackdropHeight(opts) {\n const tickOpts = opts.ticks;\n\n if (tickOpts.display && opts.display) {\n const padding = toPadding(tickOpts.backdropPadding);\n return valueOrDefault(tickOpts.font && tickOpts.font.size, defaults.font.size) + padding.height;\n }\n return 0;\n}\n\nfunction measureLabelSize(ctx, font, label) {\n label = isArray(label) ? label : [label];\n return {\n w: _longestText(ctx, font.string, label),\n h: label.length * font.lineHeight\n };\n}\n\nfunction determineLimits(angle, pos, size, min, max) {\n if (angle === min || angle === max) {\n return {\n start: pos - (size / 2),\n end: pos + (size / 2)\n };\n } else if (angle < min || angle > max) {\n return {\n start: pos - size,\n end: pos\n };\n }\n\n return {\n start: pos,\n end: pos + size\n };\n}\n\n/**\n * Helper function to fit a radial linear scale with point labels\n */\nfunction fitWithPointLabels(scale) {\n\n // Right, this is really confusing and there is a lot of maths going on here\n // The gist of the problem is here: https://gist.github.com/nnnick/696cc9c55f4b0beb8fe9\n //\n // Reaction: https://dl.dropboxusercontent.com/u/34601363/toomuchscience.gif\n //\n // Solution:\n //\n // We assume the radius of the polygon is half the size of the canvas at first\n // at each index we check if the text overlaps.\n //\n // Where it does, we store that angle and that index.\n //\n // After finding the largest index and angle we calculate how much we need to remove\n // from the shape radius to move the point inwards by that x.\n //\n // We average the left and right distances to get the maximum shape radius that can fit in the box\n // along with labels.\n //\n // Once we have that, we can find the centre point for the chart, by taking the x text protrusion\n // on each side, removing that from the size, halving it and adding the left x protrusion width.\n //\n // This will mean we have a shape fitted to the canvas, as large as it can be with the labels\n // and position it in the most space efficient manner\n //\n // https://dl.dropboxusercontent.com/u/34601363/yeahscience.gif\n\n // Get maximum radius of the polygon. Either half the height (minus the text width) or half the width.\n // Use this to calculate the offset + change. - Make sure L/R protrusion is at least 0 to stop issues with centre points\n const orig = {\n l: scale.left + scale._padding.left,\n r: scale.right - scale._padding.right,\n t: scale.top + scale._padding.top,\n b: scale.bottom - scale._padding.bottom\n };\n const limits = Object.assign({}, orig);\n const labelSizes = [];\n const padding = [];\n const valueCount = scale._pointLabels.length;\n const pointLabelOpts = scale.options.pointLabels;\n const additionalAngle = pointLabelOpts.centerPointLabels ? PI / valueCount : 0;\n\n for (let i = 0; i < valueCount; i++) {\n const opts = pointLabelOpts.setContext(scale.getPointLabelContext(i));\n padding[i] = opts.padding;\n const pointPosition = scale.getPointPosition(i, scale.drawingArea + padding[i], additionalAngle);\n const plFont = toFont(opts.font);\n const textSize = measureLabelSize(scale.ctx, plFont, scale._pointLabels[i]);\n labelSizes[i] = textSize;\n\n const angleRadians = _normalizeAngle(scale.getIndexAngle(i) + additionalAngle);\n const angle = Math.round(toDegrees(angleRadians));\n const hLimits = determineLimits(angle, pointPosition.x, textSize.w, 0, 180);\n const vLimits = determineLimits(angle, pointPosition.y, textSize.h, 90, 270);\n updateLimits(limits, orig, angleRadians, hLimits, vLimits);\n }\n\n scale.setCenterPoint(\n orig.l - limits.l,\n limits.r - orig.r,\n orig.t - limits.t,\n limits.b - orig.b\n );\n\n // Now that text size is determined, compute the full positions\n scale._pointLabelItems = buildPointLabelItems(scale, labelSizes, padding);\n}\n\nfunction updateLimits(limits, orig, angle, hLimits, vLimits) {\n const sin = Math.abs(Math.sin(angle));\n const cos = Math.abs(Math.cos(angle));\n let x = 0;\n let y = 0;\n if (hLimits.start < orig.l) {\n x = (orig.l - hLimits.start) / sin;\n limits.l = Math.min(limits.l, orig.l - x);\n } else if (hLimits.end > orig.r) {\n x = (hLimits.end - orig.r) / sin;\n limits.r = Math.max(limits.r, orig.r + x);\n }\n if (vLimits.start < orig.t) {\n y = (orig.t - vLimits.start) / cos;\n limits.t = Math.min(limits.t, orig.t - y);\n } else if (vLimits.end > orig.b) {\n y = (vLimits.end - orig.b) / cos;\n limits.b = Math.max(limits.b, orig.b + y);\n }\n}\n\nfunction createPointLabelItem(scale, index, itemOpts) {\n const outerDistance = scale.drawingArea;\n const {extra, additionalAngle, padding, size} = itemOpts;\n const pointLabelPosition = scale.getPointPosition(index, outerDistance + extra + padding, additionalAngle);\n const angle = Math.round(toDegrees(_normalizeAngle(pointLabelPosition.angle + HALF_PI)));\n const y = yForAngle(pointLabelPosition.y, size.h, angle);\n const textAlign = getTextAlignForAngle(angle);\n const left = leftForTextAlign(pointLabelPosition.x, size.w, textAlign);\n return {\n // if to draw or overlapped\n visible: true,\n\n // Text position\n x: pointLabelPosition.x,\n y,\n\n // Text rendering data\n textAlign,\n\n // Bounding box\n left,\n top: y,\n right: left + size.w,\n bottom: y + size.h\n };\n}\n\nfunction isNotOverlapped(item, area) {\n if (!area) {\n return true;\n }\n const {left, top, right, bottom} = item;\n const apexesInArea = _isPointInArea({x: left, y: top}, area) || _isPointInArea({x: left, y: bottom}, area) ||\n _isPointInArea({x: right, y: top}, area) || _isPointInArea({x: right, y: bottom}, area);\n return !apexesInArea;\n}\n\nfunction buildPointLabelItems(scale, labelSizes, padding) {\n const items = [];\n const valueCount = scale._pointLabels.length;\n const opts = scale.options;\n const {centerPointLabels, display} = opts.pointLabels;\n const itemOpts = {\n extra: getTickBackdropHeight(opts) / 2,\n additionalAngle: centerPointLabels ? PI / valueCount : 0\n };\n let area;\n\n for (let i = 0; i < valueCount; i++) {\n itemOpts.padding = padding[i];\n itemOpts.size = labelSizes[i];\n\n const item = createPointLabelItem(scale, i, itemOpts);\n items.push(item);\n if (display === 'auto') {\n item.visible = isNotOverlapped(item, area);\n if (item.visible) {\n area = item;\n }\n }\n }\n return items;\n}\n\nfunction getTextAlignForAngle(angle) {\n if (angle === 0 || angle === 180) {\n return 'center';\n } else if (angle < 180) {\n return 'left';\n }\n\n return 'right';\n}\n\nfunction leftForTextAlign(x, w, align) {\n if (align === 'right') {\n x -= w;\n } else if (align === 'center') {\n x -= (w / 2);\n }\n return x;\n}\n\nfunction yForAngle(y, h, angle) {\n if (angle === 90 || angle === 270) {\n y -= (h / 2);\n } else if (angle > 270 || angle < 90) {\n y -= h;\n }\n return y;\n}\n\nfunction drawPointLabelBox(ctx, opts, item) {\n const {left, top, right, bottom} = item;\n const {backdropColor} = opts;\n\n if (!isNullOrUndef(backdropColor)) {\n const borderRadius = toTRBLCorners(opts.borderRadius);\n const padding = toPadding(opts.backdropPadding);\n ctx.fillStyle = backdropColor;\n\n const backdropLeft = left - padding.left;\n const backdropTop = top - padding.top;\n const backdropWidth = right - left + padding.width;\n const backdropHeight = bottom - top + padding.height;\n\n if (Object.values(borderRadius).some(v => v !== 0)) {\n ctx.beginPath();\n addRoundedRectPath(ctx, {\n x: backdropLeft,\n y: backdropTop,\n w: backdropWidth,\n h: backdropHeight,\n radius: borderRadius,\n });\n ctx.fill();\n } else {\n ctx.fillRect(backdropLeft, backdropTop, backdropWidth, backdropHeight);\n }\n }\n}\n\nfunction drawPointLabels(scale, labelCount) {\n const {ctx, options: {pointLabels}} = scale;\n\n for (let i = labelCount - 1; i >= 0; i--) {\n const item = scale._pointLabelItems[i];\n if (!item.visible) {\n // overlapping\n continue;\n }\n const optsAtIndex = pointLabels.setContext(scale.getPointLabelContext(i));\n drawPointLabelBox(ctx, optsAtIndex, item);\n const plFont = toFont(optsAtIndex.font);\n const {x, y, textAlign} = item;\n\n renderText(\n ctx,\n scale._pointLabels[i],\n x,\n y + (plFont.lineHeight / 2),\n plFont,\n {\n color: optsAtIndex.color,\n textAlign: textAlign,\n textBaseline: 'middle'\n }\n );\n }\n}\n\nfunction pathRadiusLine(scale, radius, circular, labelCount) {\n const {ctx} = scale;\n if (circular) {\n // Draw circular arcs between the points\n ctx.arc(scale.xCenter, scale.yCenter, radius, 0, TAU);\n } else {\n // Draw straight lines connecting each index\n let pointPosition = scale.getPointPosition(0, radius);\n ctx.moveTo(pointPosition.x, pointPosition.y);\n\n for (let i = 1; i < labelCount; i++) {\n pointPosition = scale.getPointPosition(i, radius);\n ctx.lineTo(pointPosition.x, pointPosition.y);\n }\n }\n}\n\nfunction drawRadiusLine(scale, gridLineOpts, radius, labelCount, borderOpts) {\n const ctx = scale.ctx;\n const circular = gridLineOpts.circular;\n\n const {color, lineWidth} = gridLineOpts;\n\n if ((!circular && !labelCount) || !color || !lineWidth || radius < 0) {\n return;\n }\n\n ctx.save();\n ctx.strokeStyle = color;\n ctx.lineWidth = lineWidth;\n ctx.setLineDash(borderOpts.dash);\n ctx.lineDashOffset = borderOpts.dashOffset;\n\n ctx.beginPath();\n pathRadiusLine(scale, radius, circular, labelCount);\n ctx.closePath();\n ctx.stroke();\n ctx.restore();\n}\n\nfunction createPointLabelContext(parent, index, label) {\n return createContext(parent, {\n label,\n index,\n type: 'pointLabel'\n });\n}\n\nexport default class RadialLinearScale extends LinearScaleBase {\n\n static id = 'radialLinear';\n\n /**\n * @type {any}\n */\n static defaults = {\n display: true,\n\n // Boolean - Whether to animate scaling the chart from the centre\n animate: true,\n position: 'chartArea',\n\n angleLines: {\n display: true,\n lineWidth: 1,\n borderDash: [],\n borderDashOffset: 0.0\n },\n\n grid: {\n circular: false\n },\n\n startAngle: 0,\n\n // label settings\n ticks: {\n // Boolean - Show a backdrop to the scale label\n showLabelBackdrop: true,\n\n callback: Ticks.formatters.numeric\n },\n\n pointLabels: {\n backdropColor: undefined,\n\n // Number - The backdrop padding above & below the label in pixels\n backdropPadding: 2,\n\n // Boolean - if true, show point labels\n display: true,\n\n // Number - Point label font size in pixels\n font: {\n size: 10\n },\n\n // Function - Used to convert point labels\n callback(label) {\n return label;\n },\n\n // Number - Additionl padding between scale and pointLabel\n padding: 5,\n\n // Boolean - if true, center point labels to slices in polar chart\n centerPointLabels: false\n }\n };\n\n static defaultRoutes = {\n 'angleLines.color': 'borderColor',\n 'pointLabels.color': 'color',\n 'ticks.color': 'color'\n };\n\n static descriptors = {\n angleLines: {\n _fallback: 'grid'\n }\n };\n\n constructor(cfg) {\n super(cfg);\n\n /** @type {number} */\n this.xCenter = undefined;\n /** @type {number} */\n this.yCenter = undefined;\n /** @type {number} */\n this.drawingArea = undefined;\n /** @type {string[]} */\n this._pointLabels = [];\n this._pointLabelItems = [];\n }\n\n setDimensions() {\n // Set the unconstrained dimension before label rotation\n const padding = this._padding = toPadding(getTickBackdropHeight(this.options) / 2);\n const w = this.width = this.maxWidth - padding.width;\n const h = this.height = this.maxHeight - padding.height;\n this.xCenter = Math.floor(this.left + w / 2 + padding.left);\n this.yCenter = Math.floor(this.top + h / 2 + padding.top);\n this.drawingArea = Math.floor(Math.min(w, h) / 2);\n }\n\n determineDataLimits() {\n const {min, max} = this.getMinMax(false);\n\n this.min = isFinite(min) && !isNaN(min) ? min : 0;\n this.max = isFinite(max) && !isNaN(max) ? max : 0;\n\n // Common base implementation to handle min, max, beginAtZero\n this.handleTickRangeOptions();\n }\n\n /**\n\t * Returns the maximum number of ticks based on the scale dimension\n\t * @protected\n\t */\n computeTickLimit() {\n return Math.ceil(this.drawingArea / getTickBackdropHeight(this.options));\n }\n\n generateTickLabels(ticks) {\n LinearScaleBase.prototype.generateTickLabels.call(this, ticks);\n\n // Point labels\n this._pointLabels = this.getLabels()\n .map((value, index) => {\n const label = callCallback(this.options.pointLabels.callback, [value, index], this);\n return label || label === 0 ? label : '';\n })\n .filter((v, i) => this.chart.getDataVisibility(i));\n }\n\n fit() {\n const opts = this.options;\n\n if (opts.display && opts.pointLabels.display) {\n fitWithPointLabels(this);\n } else {\n this.setCenterPoint(0, 0, 0, 0);\n }\n }\n\n setCenterPoint(leftMovement, rightMovement, topMovement, bottomMovement) {\n this.xCenter += Math.floor((leftMovement - rightMovement) / 2);\n this.yCenter += Math.floor((topMovement - bottomMovement) / 2);\n this.drawingArea -= Math.min(this.drawingArea / 2, Math.max(leftMovement, rightMovement, topMovement, bottomMovement));\n }\n\n getIndexAngle(index) {\n const angleMultiplier = TAU / (this._pointLabels.length || 1);\n const startAngle = this.options.startAngle || 0;\n\n return _normalizeAngle(index * angleMultiplier + toRadians(startAngle));\n }\n\n getDistanceFromCenterForValue(value) {\n if (isNullOrUndef(value)) {\n return NaN;\n }\n\n // Take into account half font size + the yPadding of the top value\n const scalingFactor = this.drawingArea / (this.max - this.min);\n if (this.options.reverse) {\n return (this.max - value) * scalingFactor;\n }\n return (value - this.min) * scalingFactor;\n }\n\n getValueForDistanceFromCenter(distance) {\n if (isNullOrUndef(distance)) {\n return NaN;\n }\n\n const scaledDistance = distance / (this.drawingArea / (this.max - this.min));\n return this.options.reverse ? this.max - scaledDistance : this.min + scaledDistance;\n }\n\n getPointLabelContext(index) {\n const pointLabels = this._pointLabels || [];\n\n if (index >= 0 && index < pointLabels.length) {\n const pointLabel = pointLabels[index];\n return createPointLabelContext(this.getContext(), index, pointLabel);\n }\n }\n\n getPointPosition(index, distanceFromCenter, additionalAngle = 0) {\n const angle = this.getIndexAngle(index) - HALF_PI + additionalAngle;\n return {\n x: Math.cos(angle) * distanceFromCenter + this.xCenter,\n y: Math.sin(angle) * distanceFromCenter + this.yCenter,\n angle\n };\n }\n\n getPointPositionForValue(index, value) {\n return this.getPointPosition(index, this.getDistanceFromCenterForValue(value));\n }\n\n getBasePosition(index) {\n return this.getPointPositionForValue(index || 0, this.getBaseValue());\n }\n\n getPointLabelPosition(index) {\n const {left, top, right, bottom} = this._pointLabelItems[index];\n return {\n left,\n top,\n right,\n bottom,\n };\n }\n\n /**\n\t * @protected\n\t */\n drawBackground() {\n const {backgroundColor, grid: {circular}} = this.options;\n if (backgroundColor) {\n const ctx = this.ctx;\n ctx.save();\n ctx.beginPath();\n pathRadiusLine(this, this.getDistanceFromCenterForValue(this._endValue), circular, this._pointLabels.length);\n ctx.closePath();\n ctx.fillStyle = backgroundColor;\n ctx.fill();\n ctx.restore();\n }\n }\n\n /**\n\t * @protected\n\t */\n drawGrid() {\n const ctx = this.ctx;\n const opts = this.options;\n const {angleLines, grid, border} = opts;\n const labelCount = this._pointLabels.length;\n\n let i, offset, position;\n\n if (opts.pointLabels.display) {\n drawPointLabels(this, labelCount);\n }\n\n if (grid.display) {\n this.ticks.forEach((tick, index) => {\n if (index !== 0) {\n offset = this.getDistanceFromCenterForValue(tick.value);\n const context = this.getContext(index);\n const optsAtIndex = grid.setContext(context);\n const optsAtIndexBorder = border.setContext(context);\n\n drawRadiusLine(this, optsAtIndex, offset, labelCount, optsAtIndexBorder);\n }\n });\n }\n\n if (angleLines.display) {\n ctx.save();\n\n for (i = labelCount - 1; i >= 0; i--) {\n const optsAtIndex = angleLines.setContext(this.getPointLabelContext(i));\n const {color, lineWidth} = optsAtIndex;\n\n if (!lineWidth || !color) {\n continue;\n }\n\n ctx.lineWidth = lineWidth;\n ctx.strokeStyle = color;\n\n ctx.setLineDash(optsAtIndex.borderDash);\n ctx.lineDashOffset = optsAtIndex.borderDashOffset;\n\n offset = this.getDistanceFromCenterForValue(opts.ticks.reverse ? this.min : this.max);\n position = this.getPointPosition(i, offset);\n ctx.beginPath();\n ctx.moveTo(this.xCenter, this.yCenter);\n ctx.lineTo(position.x, position.y);\n ctx.stroke();\n }\n\n ctx.restore();\n }\n }\n\n /**\n\t * @protected\n\t */\n drawBorder() {}\n\n /**\n\t * @protected\n\t */\n drawLabels() {\n const ctx = this.ctx;\n const opts = this.options;\n const tickOpts = opts.ticks;\n\n if (!tickOpts.display) {\n return;\n }\n\n const startAngle = this.getIndexAngle(0);\n let offset, width;\n\n ctx.save();\n ctx.translate(this.xCenter, this.yCenter);\n ctx.rotate(startAngle);\n ctx.textAlign = 'center';\n ctx.textBaseline = 'middle';\n\n this.ticks.forEach((tick, index) => {\n if (index === 0 && !opts.reverse) {\n return;\n }\n\n const optsAtIndex = tickOpts.setContext(this.getContext(index));\n const tickFont = toFont(optsAtIndex.font);\n offset = this.getDistanceFromCenterForValue(this.ticks[index].value);\n\n if (optsAtIndex.showLabelBackdrop) {\n ctx.font = tickFont.string;\n width = ctx.measureText(tick.label).width;\n ctx.fillStyle = optsAtIndex.backdropColor;\n\n const padding = toPadding(optsAtIndex.backdropPadding);\n ctx.fillRect(\n -width / 2 - padding.left,\n -offset - tickFont.size / 2 - padding.top,\n width + padding.width,\n tickFont.size + padding.height\n );\n }\n\n renderText(ctx, tick.label, 0, -offset, tickFont, {\n color: optsAtIndex.color,\n strokeColor: optsAtIndex.textStrokeColor,\n strokeWidth: optsAtIndex.textStrokeWidth,\n });\n });\n\n ctx.restore();\n }\n\n /**\n\t * @protected\n\t */\n drawTitle() {}\n}\n","import adapters from '../core/core.adapters.js';\nimport {callback as call, isFinite, isNullOrUndef, mergeIf, valueOrDefault} from '../helpers/helpers.core.js';\nimport {toRadians, isNumber, _limitValue} from '../helpers/helpers.math.js';\nimport Scale from '../core/core.scale.js';\nimport {_arrayUnique, _filterBetween, _lookup} from '../helpers/helpers.collection.js';\n\n/**\n * @typedef { import('../core/core.adapters.js').TimeUnit } Unit\n * @typedef {{common: boolean, size: number, steps?: number}} Interval\n * @typedef { import('../core/core.adapters.js').DateAdapter } DateAdapter\n */\n\n/**\n * @type {Object}\n */\nconst INTERVALS = {\n millisecond: {common: true, size: 1, steps: 1000},\n second: {common: true, size: 1000, steps: 60},\n minute: {common: true, size: 60000, steps: 60},\n hour: {common: true, size: 3600000, steps: 24},\n day: {common: true, size: 86400000, steps: 30},\n week: {common: false, size: 604800000, steps: 4},\n month: {common: true, size: 2.628e9, steps: 12},\n quarter: {common: false, size: 7.884e9, steps: 4},\n year: {common: true, size: 3.154e10}\n};\n\n/**\n * @type {Unit[]}\n */\nconst UNITS = /** @type Unit[] */ /* #__PURE__ */ (Object.keys(INTERVALS));\n\n/**\n * @param {number} a\n * @param {number} b\n */\nfunction sorter(a, b) {\n return a - b;\n}\n\n/**\n * @param {TimeScale} scale\n * @param {*} input\n * @return {number}\n */\nfunction parse(scale, input) {\n if (isNullOrUndef(input)) {\n return null;\n }\n\n const adapter = scale._adapter;\n const {parser, round, isoWeekday} = scale._parseOpts;\n let value = input;\n\n if (typeof parser === 'function') {\n value = parser(value);\n }\n\n // Only parse if it's not a timestamp already\n if (!isFinite(value)) {\n value = typeof parser === 'string'\n ? adapter.parse(value, /** @type {Unit} */ (parser))\n : adapter.parse(value);\n }\n\n if (value === null) {\n return null;\n }\n\n if (round) {\n value = round === 'week' && (isNumber(isoWeekday) || isoWeekday === true)\n ? adapter.startOf(value, 'isoWeek', isoWeekday)\n : adapter.startOf(value, round);\n }\n\n return +value;\n}\n\n/**\n * Figures out what unit results in an appropriate number of auto-generated ticks\n * @param {Unit} minUnit\n * @param {number} min\n * @param {number} max\n * @param {number} capacity\n * @return {object}\n */\nfunction determineUnitForAutoTicks(minUnit, min, max, capacity) {\n const ilen = UNITS.length;\n\n for (let i = UNITS.indexOf(minUnit); i < ilen - 1; ++i) {\n const interval = INTERVALS[UNITS[i]];\n const factor = interval.steps ? interval.steps : Number.MAX_SAFE_INTEGER;\n\n if (interval.common && Math.ceil((max - min) / (factor * interval.size)) <= capacity) {\n return UNITS[i];\n }\n }\n\n return UNITS[ilen - 1];\n}\n\n/**\n * Figures out what unit to format a set of ticks with\n * @param {TimeScale} scale\n * @param {number} numTicks\n * @param {Unit} minUnit\n * @param {number} min\n * @param {number} max\n * @return {Unit}\n */\nfunction determineUnitForFormatting(scale, numTicks, minUnit, min, max) {\n for (let i = UNITS.length - 1; i >= UNITS.indexOf(minUnit); i--) {\n const unit = UNITS[i];\n if (INTERVALS[unit].common && scale._adapter.diff(max, min, unit) >= numTicks - 1) {\n return unit;\n }\n }\n\n return UNITS[minUnit ? UNITS.indexOf(minUnit) : 0];\n}\n\n/**\n * @param {Unit} unit\n * @return {object}\n */\nfunction determineMajorUnit(unit) {\n for (let i = UNITS.indexOf(unit) + 1, ilen = UNITS.length; i < ilen; ++i) {\n if (INTERVALS[UNITS[i]].common) {\n return UNITS[i];\n }\n }\n}\n\n/**\n * @param {object} ticks\n * @param {number} time\n * @param {number[]} [timestamps] - if defined, snap to these timestamps\n */\nfunction addTick(ticks, time, timestamps) {\n if (!timestamps) {\n ticks[time] = true;\n } else if (timestamps.length) {\n const {lo, hi} = _lookup(timestamps, time);\n const timestamp = timestamps[lo] >= time ? timestamps[lo] : timestamps[hi];\n ticks[timestamp] = true;\n }\n}\n\n/**\n * @param {TimeScale} scale\n * @param {object[]} ticks\n * @param {object} map\n * @param {Unit} majorUnit\n * @return {object[]}\n */\nfunction setMajorTicks(scale, ticks, map, majorUnit) {\n const adapter = scale._adapter;\n const first = +adapter.startOf(ticks[0].value, majorUnit);\n const last = ticks[ticks.length - 1].value;\n let major, index;\n\n for (major = first; major <= last; major = +adapter.add(major, 1, majorUnit)) {\n index = map[major];\n if (index >= 0) {\n ticks[index].major = true;\n }\n }\n return ticks;\n}\n\n/**\n * @param {TimeScale} scale\n * @param {number[]} values\n * @param {Unit|undefined} [majorUnit]\n * @return {object[]}\n */\nfunction ticksFromTimestamps(scale, values, majorUnit) {\n const ticks = [];\n /** @type {Object} */\n const map = {};\n const ilen = values.length;\n let i, value;\n\n for (i = 0; i < ilen; ++i) {\n value = values[i];\n map[value] = i;\n\n ticks.push({\n value,\n major: false\n });\n }\n\n // We set the major ticks separately from the above loop because calling startOf for every tick\n // is expensive when there is a large number of ticks\n return (ilen === 0 || !majorUnit) ? ticks : setMajorTicks(scale, ticks, map, majorUnit);\n}\n\nexport default class TimeScale extends Scale {\n\n static id = 'time';\n\n /**\n * @type {any}\n */\n static defaults = {\n /**\n * Scale boundary strategy (bypassed by min/max time options)\n * - `data`: make sure data are fully visible, ticks outside are removed\n * - `ticks`: make sure ticks are fully visible, data outside are truncated\n * @see https://github.com/chartjs/Chart.js/pull/4556\n * @since 2.7.0\n */\n bounds: 'data',\n\n adapters: {},\n time: {\n parser: false, // false == a pattern string from or a custom callback that converts its argument to a timestamp\n unit: false, // false == automatic or override with week, month, year, etc.\n round: false, // none, or override with week, month, year, etc.\n isoWeekday: false, // override week start day\n minUnit: 'millisecond',\n displayFormats: {}\n },\n ticks: {\n /**\n * Ticks generation input values:\n * - 'auto': generates \"optimal\" ticks based on scale size and time options.\n * - 'data': generates ticks from data (including labels from data {t|x|y} objects).\n * - 'labels': generates ticks from user given `data.labels` values ONLY.\n * @see https://github.com/chartjs/Chart.js/pull/4507\n * @since 2.7.0\n */\n source: 'auto',\n\n callback: false,\n\n major: {\n enabled: false\n }\n }\n };\n\n /**\n\t * @param {object} props\n\t */\n constructor(props) {\n super(props);\n\n /** @type {{data: number[], labels: number[], all: number[]}} */\n this._cache = {\n data: [],\n labels: [],\n all: []\n };\n\n /** @type {Unit} */\n this._unit = 'day';\n /** @type {Unit=} */\n this._majorUnit = undefined;\n this._offsets = {};\n this._normalized = false;\n this._parseOpts = undefined;\n }\n\n init(scaleOpts, opts = {}) {\n const time = scaleOpts.time || (scaleOpts.time = {});\n /** @type {DateAdapter} */\n const adapter = this._adapter = new adapters._date(scaleOpts.adapters.date);\n\n adapter.init(opts);\n\n // Backward compatibility: before introducing adapter, `displayFormats` was\n // supposed to contain *all* unit/string pairs but this can't be resolved\n // when loading the scale (adapters are loaded afterward), so let's populate\n // missing formats on update\n mergeIf(time.displayFormats, adapter.formats());\n\n this._parseOpts = {\n parser: time.parser,\n round: time.round,\n isoWeekday: time.isoWeekday\n };\n\n super.init(scaleOpts);\n\n this._normalized = opts.normalized;\n }\n\n /**\n\t * @param {*} raw\n\t * @param {number?} [index]\n\t * @return {number}\n\t */\n parse(raw, index) { // eslint-disable-line no-unused-vars\n if (raw === undefined) {\n return null;\n }\n return parse(this, raw);\n }\n\n beforeLayout() {\n super.beforeLayout();\n this._cache = {\n data: [],\n labels: [],\n all: []\n };\n }\n\n determineDataLimits() {\n const options = this.options;\n const adapter = this._adapter;\n const unit = options.time.unit || 'day';\n // eslint-disable-next-line prefer-const\n let {min, max, minDefined, maxDefined} = this.getUserBounds();\n\n /**\n\t\t * @param {object} bounds\n\t\t */\n function _applyBounds(bounds) {\n if (!minDefined && !isNaN(bounds.min)) {\n min = Math.min(min, bounds.min);\n }\n if (!maxDefined && !isNaN(bounds.max)) {\n max = Math.max(max, bounds.max);\n }\n }\n\n // If we have user provided `min` and `max` labels / data bounds can be ignored\n if (!minDefined || !maxDefined) {\n // Labels are always considered, when user did not force bounds\n _applyBounds(this._getLabelBounds());\n\n // If `bounds` is `'ticks'` and `ticks.source` is `'labels'`,\n // data bounds are ignored (and don't need to be determined)\n if (options.bounds !== 'ticks' || options.ticks.source !== 'labels') {\n _applyBounds(this.getMinMax(false));\n }\n }\n\n min = isFinite(min) && !isNaN(min) ? min : +adapter.startOf(Date.now(), unit);\n max = isFinite(max) && !isNaN(max) ? max : +adapter.endOf(Date.now(), unit) + 1;\n\n // Make sure that max is strictly higher than min (required by the timeseries lookup table)\n this.min = Math.min(min, max - 1);\n this.max = Math.max(min + 1, max);\n }\n\n /**\n\t * @private\n\t */\n _getLabelBounds() {\n const arr = this.getLabelTimestamps();\n let min = Number.POSITIVE_INFINITY;\n let max = Number.NEGATIVE_INFINITY;\n\n if (arr.length) {\n min = arr[0];\n max = arr[arr.length - 1];\n }\n return {min, max};\n }\n\n /**\n\t * @return {object[]}\n\t */\n buildTicks() {\n const options = this.options;\n const timeOpts = options.time;\n const tickOpts = options.ticks;\n const timestamps = tickOpts.source === 'labels' ? this.getLabelTimestamps() : this._generate();\n\n if (options.bounds === 'ticks' && timestamps.length) {\n this.min = this._userMin || timestamps[0];\n this.max = this._userMax || timestamps[timestamps.length - 1];\n }\n\n const min = this.min;\n const max = this.max;\n\n const ticks = _filterBetween(timestamps, min, max);\n\n // PRIVATE\n // determineUnitForFormatting relies on the number of ticks so we don't use it when\n // autoSkip is enabled because we don't yet know what the final number of ticks will be\n this._unit = timeOpts.unit || (tickOpts.autoSkip\n ? determineUnitForAutoTicks(timeOpts.minUnit, this.min, this.max, this._getLabelCapacity(min))\n : determineUnitForFormatting(this, ticks.length, timeOpts.minUnit, this.min, this.max));\n this._majorUnit = !tickOpts.major.enabled || this._unit === 'year' ? undefined\n : determineMajorUnit(this._unit);\n this.initOffsets(timestamps);\n\n if (options.reverse) {\n ticks.reverse();\n }\n\n return ticksFromTimestamps(this, ticks, this._majorUnit);\n }\n\n afterAutoSkip() {\n // Offsets for bar charts need to be handled with the auto skipped\n // ticks. Once ticks have been skipped, we re-compute the offsets.\n if (this.options.offsetAfterAutoskip) {\n this.initOffsets(this.ticks.map(tick => +tick.value));\n }\n }\n\n /**\n\t * Returns the start and end offsets from edges in the form of {start, end}\n\t * where each value is a relative width to the scale and ranges between 0 and 1.\n\t * They add extra margins on the both sides by scaling down the original scale.\n\t * Offsets are added when the `offset` option is true.\n\t * @param {number[]} timestamps\n\t * @protected\n\t */\n initOffsets(timestamps = []) {\n let start = 0;\n let end = 0;\n let first, last;\n\n if (this.options.offset && timestamps.length) {\n first = this.getDecimalForValue(timestamps[0]);\n if (timestamps.length === 1) {\n start = 1 - first;\n } else {\n start = (this.getDecimalForValue(timestamps[1]) - first) / 2;\n }\n last = this.getDecimalForValue(timestamps[timestamps.length - 1]);\n if (timestamps.length === 1) {\n end = last;\n } else {\n end = (last - this.getDecimalForValue(timestamps[timestamps.length - 2])) / 2;\n }\n }\n const limit = timestamps.length < 3 ? 0.5 : 0.25;\n start = _limitValue(start, 0, limit);\n end = _limitValue(end, 0, limit);\n\n this._offsets = {start, end, factor: 1 / (start + 1 + end)};\n }\n\n /**\n\t * Generates a maximum of `capacity` timestamps between min and max, rounded to the\n\t * `minor` unit using the given scale time `options`.\n\t * Important: this method can return ticks outside the min and max range, it's the\n\t * responsibility of the calling code to clamp values if needed.\n\t * @protected\n\t */\n _generate() {\n const adapter = this._adapter;\n const min = this.min;\n const max = this.max;\n const options = this.options;\n const timeOpts = options.time;\n // @ts-ignore\n const minor = timeOpts.unit || determineUnitForAutoTicks(timeOpts.minUnit, min, max, this._getLabelCapacity(min));\n const stepSize = valueOrDefault(options.ticks.stepSize, 1);\n const weekday = minor === 'week' ? timeOpts.isoWeekday : false;\n const hasWeekday = isNumber(weekday) || weekday === true;\n const ticks = {};\n let first = min;\n let time, count;\n\n // For 'week' unit, handle the first day of week option\n if (hasWeekday) {\n first = +adapter.startOf(first, 'isoWeek', weekday);\n }\n\n // Align first ticks on unit\n first = +adapter.startOf(first, hasWeekday ? 'day' : minor);\n\n // Prevent browser from freezing in case user options request millions of milliseconds\n if (adapter.diff(max, min, minor) > 100000 * stepSize) {\n throw new Error(min + ' and ' + max + ' are too far apart with stepSize of ' + stepSize + ' ' + minor);\n }\n\n const timestamps = options.ticks.source === 'data' && this.getDataTimestamps();\n for (time = first, count = 0; time < max; time = +adapter.add(time, stepSize, minor), count++) {\n addTick(ticks, time, timestamps);\n }\n\n if (time === max || options.bounds === 'ticks' || count === 1) {\n addTick(ticks, time, timestamps);\n }\n\n // @ts-ignore\n return Object.keys(ticks).sort(sorter).map(x => +x);\n }\n\n /**\n\t * @param {number} value\n\t * @return {string}\n\t */\n getLabelForValue(value) {\n const adapter = this._adapter;\n const timeOpts = this.options.time;\n\n if (timeOpts.tooltipFormat) {\n return adapter.format(value, timeOpts.tooltipFormat);\n }\n return adapter.format(value, timeOpts.displayFormats.datetime);\n }\n\n /**\n\t * @param {number} value\n\t * @param {string|undefined} format\n\t * @return {string}\n\t */\n format(value, format) {\n const options = this.options;\n const formats = options.time.displayFormats;\n const unit = this._unit;\n const fmt = format || formats[unit];\n return this._adapter.format(value, fmt);\n }\n\n /**\n\t * Function to format an individual tick mark\n\t * @param {number} time\n\t * @param {number} index\n\t * @param {object[]} ticks\n\t * @param {string|undefined} [format]\n\t * @return {string}\n\t * @private\n\t */\n _tickFormatFunction(time, index, ticks, format) {\n const options = this.options;\n const formatter = options.ticks.callback;\n\n if (formatter) {\n return call(formatter, [time, index, ticks], this);\n }\n\n const formats = options.time.displayFormats;\n const unit = this._unit;\n const majorUnit = this._majorUnit;\n const minorFormat = unit && formats[unit];\n const majorFormat = majorUnit && formats[majorUnit];\n const tick = ticks[index];\n const major = majorUnit && majorFormat && tick && tick.major;\n\n return this._adapter.format(time, format || (major ? majorFormat : minorFormat));\n }\n\n /**\n\t * @param {object[]} ticks\n\t */\n generateTickLabels(ticks) {\n let i, ilen, tick;\n\n for (i = 0, ilen = ticks.length; i < ilen; ++i) {\n tick = ticks[i];\n tick.label = this._tickFormatFunction(tick.value, i, ticks);\n }\n }\n\n /**\n\t * @param {number} value - Milliseconds since epoch (1 January 1970 00:00:00 UTC)\n\t * @return {number}\n\t */\n getDecimalForValue(value) {\n return value === null ? NaN : (value - this.min) / (this.max - this.min);\n }\n\n /**\n\t * @param {number} value - Milliseconds since epoch (1 January 1970 00:00:00 UTC)\n\t * @return {number}\n\t */\n getPixelForValue(value) {\n const offsets = this._offsets;\n const pos = this.getDecimalForValue(value);\n return this.getPixelForDecimal((offsets.start + pos) * offsets.factor);\n }\n\n /**\n\t * @param {number} pixel\n\t * @return {number}\n\t */\n getValueForPixel(pixel) {\n const offsets = this._offsets;\n const pos = this.getDecimalForPixel(pixel) / offsets.factor - offsets.end;\n return this.min + pos * (this.max - this.min);\n }\n\n /**\n\t * @param {string} label\n\t * @return {{w:number, h:number}}\n\t * @private\n\t */\n _getLabelSize(label) {\n const ticksOpts = this.options.ticks;\n const tickLabelWidth = this.ctx.measureText(label).width;\n const angle = toRadians(this.isHorizontal() ? ticksOpts.maxRotation : ticksOpts.minRotation);\n const cosRotation = Math.cos(angle);\n const sinRotation = Math.sin(angle);\n const tickFontSize = this._resolveTickFontOptions(0).size;\n\n return {\n w: (tickLabelWidth * cosRotation) + (tickFontSize * sinRotation),\n h: (tickLabelWidth * sinRotation) + (tickFontSize * cosRotation)\n };\n }\n\n /**\n\t * @param {number} exampleTime\n\t * @return {number}\n\t * @private\n\t */\n _getLabelCapacity(exampleTime) {\n const timeOpts = this.options.time;\n const displayFormats = timeOpts.displayFormats;\n\n // pick the longest format (milliseconds) for guesstimation\n const format = displayFormats[timeOpts.unit] || displayFormats.millisecond;\n const exampleLabel = this._tickFormatFunction(exampleTime, 0, ticksFromTimestamps(this, [exampleTime], this._majorUnit), format);\n const size = this._getLabelSize(exampleLabel);\n // subtract 1 - if offset then there's one less label than tick\n // if not offset then one half label padding is added to each end leaving room for one less label\n const capacity = Math.floor(this.isHorizontal() ? this.width / size.w : this.height / size.h) - 1;\n return capacity > 0 ? capacity : 1;\n }\n\n /**\n\t * @protected\n\t */\n getDataTimestamps() {\n let timestamps = this._cache.data || [];\n let i, ilen;\n\n if (timestamps.length) {\n return timestamps;\n }\n\n const metas = this.getMatchingVisibleMetas();\n\n if (this._normalized && metas.length) {\n return (this._cache.data = metas[0].controller.getAllParsedValues(this));\n }\n\n for (i = 0, ilen = metas.length; i < ilen; ++i) {\n timestamps = timestamps.concat(metas[i].controller.getAllParsedValues(this));\n }\n\n return (this._cache.data = this.normalize(timestamps));\n }\n\n /**\n\t * @protected\n\t */\n getLabelTimestamps() {\n const timestamps = this._cache.labels || [];\n let i, ilen;\n\n if (timestamps.length) {\n return timestamps;\n }\n\n const labels = this.getLabels();\n for (i = 0, ilen = labels.length; i < ilen; ++i) {\n timestamps.push(parse(this, labels[i]));\n }\n\n return (this._cache.labels = this._normalized ? timestamps : this.normalize(timestamps));\n }\n\n /**\n\t * @param {number[]} values\n\t * @protected\n\t */\n normalize(values) {\n // It seems to be somewhat faster to do sorting first\n return _arrayUnique(values.sort(sorter));\n }\n}\n","import TimeScale from './scale.time.js';\nimport {_lookupByKey} from '../helpers/helpers.collection.js';\n\n/**\n * Linearly interpolates the given source `val` using the table. If value is out of bounds, values\n * at edges are used for the interpolation.\n * @param {object} table\n * @param {number} val\n * @param {boolean} [reverse] lookup time based on position instead of vice versa\n * @return {object}\n */\nfunction interpolate(table, val, reverse) {\n let lo = 0;\n let hi = table.length - 1;\n let prevSource, nextSource, prevTarget, nextTarget;\n if (reverse) {\n if (val >= table[lo].pos && val <= table[hi].pos) {\n ({lo, hi} = _lookupByKey(table, 'pos', val));\n }\n ({pos: prevSource, time: prevTarget} = table[lo]);\n ({pos: nextSource, time: nextTarget} = table[hi]);\n } else {\n if (val >= table[lo].time && val <= table[hi].time) {\n ({lo, hi} = _lookupByKey(table, 'time', val));\n }\n ({time: prevSource, pos: prevTarget} = table[lo]);\n ({time: nextSource, pos: nextTarget} = table[hi]);\n }\n\n const span = nextSource - prevSource;\n return span ? prevTarget + (nextTarget - prevTarget) * (val - prevSource) / span : prevTarget;\n}\n\nclass TimeSeriesScale extends TimeScale {\n\n static id = 'timeseries';\n\n /**\n * @type {any}\n */\n static defaults = TimeScale.defaults;\n\n /**\n\t * @param {object} props\n\t */\n constructor(props) {\n super(props);\n\n /** @type {object[]} */\n this._table = [];\n /** @type {number} */\n this._minPos = undefined;\n /** @type {number} */\n this._tableRange = undefined;\n }\n\n /**\n\t * @protected\n\t */\n initOffsets() {\n const timestamps = this._getTimestampsForTable();\n const table = this._table = this.buildLookupTable(timestamps);\n this._minPos = interpolate(table, this.min);\n this._tableRange = interpolate(table, this.max) - this._minPos;\n super.initOffsets(timestamps);\n }\n\n /**\n\t * Returns an array of {time, pos} objects used to interpolate a specific `time` or position\n\t * (`pos`) on the scale, by searching entries before and after the requested value. `pos` is\n\t * a decimal between 0 and 1: 0 being the start of the scale (left or top) and 1 the other\n\t * extremity (left + width or top + height). Note that it would be more optimized to directly\n\t * store pre-computed pixels, but the scale dimensions are not guaranteed at the time we need\n\t * to create the lookup table. The table ALWAYS contains at least two items: min and max.\n\t * @param {number[]} timestamps\n\t * @return {object[]}\n\t * @protected\n\t */\n buildLookupTable(timestamps) {\n const {min, max} = this;\n const items = [];\n const table = [];\n let i, ilen, prev, curr, next;\n\n for (i = 0, ilen = timestamps.length; i < ilen; ++i) {\n curr = timestamps[i];\n if (curr >= min && curr <= max) {\n items.push(curr);\n }\n }\n\n if (items.length < 2) {\n // In case there is less that 2 timestamps between min and max, the scale is defined by min and max\n return [\n {time: min, pos: 0},\n {time: max, pos: 1}\n ];\n }\n\n for (i = 0, ilen = items.length; i < ilen; ++i) {\n next = items[i + 1];\n prev = items[i - 1];\n curr = items[i];\n\n // only add points that breaks the scale linearity\n if (Math.round((next + prev) / 2) !== curr) {\n table.push({time: curr, pos: i / (ilen - 1)});\n }\n }\n return table;\n }\n\n /**\n * Generates all timestamps defined in the data.\n * Important: this method can return ticks outside the min and max range, it's the\n * responsibility of the calling code to clamp values if needed.\n * @protected\n */\n _generate() {\n const min = this.min;\n const max = this.max;\n let timestamps = super.getDataTimestamps();\n if (!timestamps.includes(min) || !timestamps.length) {\n timestamps.splice(0, 0, min);\n }\n if (!timestamps.includes(max) || timestamps.length === 1) {\n timestamps.push(max);\n }\n return timestamps.sort((a, b) => a - b);\n }\n\n /**\n\t * Returns all timestamps\n\t * @return {number[]}\n\t * @private\n\t */\n _getTimestampsForTable() {\n let timestamps = this._cache.all || [];\n\n if (timestamps.length) {\n return timestamps;\n }\n\n const data = this.getDataTimestamps();\n const label = this.getLabelTimestamps();\n if (data.length && label.length) {\n // If combining labels and data (data might not contain all labels),\n // we need to recheck uniqueness and sort\n timestamps = this.normalize(data.concat(label));\n } else {\n timestamps = data.length ? data : label;\n }\n timestamps = this._cache.all = timestamps;\n\n return timestamps;\n }\n\n /**\n\t * @param {number} value - Milliseconds since epoch (1 January 1970 00:00:00 UTC)\n\t * @return {number}\n\t */\n getDecimalForValue(value) {\n return (interpolate(this._table, value) - this._minPos) / this._tableRange;\n }\n\n /**\n\t * @param {number} pixel\n\t * @return {number}\n\t */\n getValueForPixel(pixel) {\n const offsets = this._offsets;\n const decimal = this.getDecimalForPixel(pixel) / offsets.factor - offsets.end;\n return interpolate(this._table, decimal * this._tableRange + this._minPos, true);\n }\n}\n\nexport default TimeSeriesScale;\n","export * from './controllers/index.js';\nexport * from './core/index.js';\nexport * from './elements/index.js';\nexport * from './platform/index.js';\nexport * from './plugins/index.js';\nexport * from './scales/index.js';\n\nimport * as controllers from './controllers/index.js';\nimport * as elements from './elements/index.js';\nimport * as plugins from './plugins/index.js';\nimport * as scales from './scales/index.js';\n\nexport {\n controllers,\n elements,\n plugins,\n scales,\n};\n\nexport const registerables = [\n controllers,\n elements,\n plugins,\n scales,\n];\n","import {Chart, registerables} from '../dist/chart.js';\n\nChart.register(...registerables);\n\nexport * from '../dist/chart.js';\nexport default Chart;\n","import { useEffect, useRef } from \"react\";\r\nimport {Chart} from \"chart.js/auto\";\r\nimport './HighlightLineChart.css';\r\nimport {formatChartJSObject, highlightLine} from \"./utilities/highlightChartSettings\";\r\n\r\nconst HighlightLineChart = props => {\r\n\r\n const chartRef = useRef();\r\n const chartObj = useRef(null);\r\n const chartData = useRef(null);\r\n\r\n\r\n useEffect(() => {\r\n\r\n let chart = chartObj?.current;\r\n if(chartData.current && chartData.current !== props.chartData){\r\n chart.destroy();\r\n chart = null;\r\n }\r\n if(!chart && props.chartData){\r\n \r\n const chartSetup = formatChartJSObject(props.chartData);\r\n if(props.reverse){\r\n chartSetup.options.scales.y.reverse = true;\r\n }\r\n chartObj.current = new Chart(chartRef.current, chartSetup);\r\n chartRef.current.onclick = function(event){\r\n canvasClickHandler(event, chartObj?.current);\r\n console.log('clicked');\r\n }\r\n chartData.current = props.chartData;\r\n\r\n }\r\n\r\n }, [props.chartData, props.reverse])\r\n\r\n\r\n return (\r\n
)\r\n }else{\r\n return this.loadingScreen();\r\n }\r\n }\r\n\r\n render(){\r\n\r\n \r\n return (\r\n <>\r\n {this.getResultsScreen()}\r\n \r\n );\r\n }\r\n}\r\n\r\nexport default Results;\r\n","import React, { useEffect, useState } from \"react\";\r\nimport './PowerRankings.css';\r\nimport loadingIcon from './images/loading-icon.gif';\r\n// import ChartBuilder from \"./ChartBuilder\";\r\nimport { getPowerRankingChartData } from \"./utilities/chartDataFormatHelper\";\r\nimport HighlightLineChart from \"./HighlightLineChart\";\r\n\r\n\r\nconst PowerRankings = props => {\r\n\r\n //When the power rankings tab is selected - then the season changes, and then changes back, a render occurs with updated props before the state has a chance to update\r\n //which can lead to a week=6 while powerRankings only have 1 week of data\r\n\r\n const [week, setWeek] = useState(props.powerRankings ? props.powerRankings.length - 1 : 0);\r\n const [chartData, setChartData] = useState(getPowerRankingChartData(props.powerRankings)); \r\n\r\n //if powerrankings change, update week. This only happens after the initial render though\r\n //https://stackoverflow.com/questions/65979341/usestate-does-not-update-the-value-on-component-re-render\r\n useEffect(() => {\r\n setWeek(props.powerRankings.length - 1);\r\n setChartData(getPowerRankingChartData(props.powerRankings));\r\n }, [props.powerRankings])\r\n\r\n\r\n function displayWeekToggle(){\r\n if(props.powerRankings.length > 1){\r\n let rows = props.powerRankings.map((weekEntry, index) => {\r\n let className = \"week-toggle-button\";\r\n if(parseInt(week) === index){\r\n className += \" active\";\r\n }\r\n return (
{weekEntry.label}
)\r\n })\r\n return (\r\n
\r\n {rows}\r\n
\r\n )\r\n }\r\n }\r\n\r\n function toggleActiveWeek(event){\r\n let clickedWeek = event.target.dataset.name;\r\n setWeek(clickedWeek);\r\n }\r\n\r\n function loadingScreen(){\r\n return (
)\r\n }\r\n\r\n function displayPowerRankings(){\r\n \r\n if(props.powerRankings && week < props.powerRankings.length){\r\n let tableRows = props.powerRankings[week].rankings.map((value, index) => {\r\n return (\r\n