10762 lines
335 KiB
JavaScript
10762 lines
335 KiB
JavaScript
/*!
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* Chart.js v3.9.1
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* https://www.chartjs.org
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* (c) 2022 Chart.js Contributors
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* Released under the MIT License
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*/
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import { r as requestAnimFrame, a as resolve, e as effects, c as color, d as defaults, i as isObject, b as isArray, v as valueOrDefault, u as unlistenArrayEvents, l as listenArrayEvents, f as resolveObjectKey, g as isNumberFinite, h as createContext, j as defined, s as sign, k as isNullOrUndef, _ as _arrayUnique, t as toRadians, m as toPercentage, n as toDimension, T as TAU, o as formatNumber, p as _angleBetween, H as HALF_PI, P as PI, q as _getStartAndCountOfVisiblePoints, w as _scaleRangesChanged, x as isNumber, y as _parseObjectDataRadialScale, z as log10, A as _factorize, B as finiteOrDefault, C as callback, D as _addGrace, E as _limitValue, F as toDegrees, G as _measureText, I as _int16Range, J as _alignPixel, K as toPadding, L as clipArea, M as renderText, N as unclipArea, O as toFont, Q as each, R as _toLeftRightCenter, S as _alignStartEnd, U as overrides, V as merge, W as _capitalize, X as getRelativePosition, Y as _rlookupByKey, Z as _lookupByKey, $ as _isPointInArea, a0 as getAngleFromPoint, a1 as getMaximumSize, a2 as _getParentNode, a3 as readUsedSize, a4 as throttled, a5 as supportsEventListenerOptions, a6 as _isDomSupported, a7 as descriptors, a8 as isFunction, a9 as _attachContext, aa as _createResolver, ab as _descriptors, ac as mergeIf, ad as uid, ae as debounce, af as retinaScale, ag as clearCanvas, ah as setsEqual, ai as _elementsEqual, aj as _isClickEvent, ak as _isBetween, al as _readValueToProps, am as _updateBezierControlPoints, an as _computeSegments, ao as _boundSegments, ap as _steppedInterpolation, aq as _bezierInterpolation, ar as _pointInLine, as as _steppedLineTo, at as _bezierCurveTo, au as drawPoint, av as addRoundedRectPath, aw as toTRBL, ax as toTRBLCorners, ay as _boundSegment, az as _normalizeAngle, aA as getRtlAdapter, aB as overrideTextDirection, aC as _textX, aD as restoreTextDirection, aE as drawPointLegend, aF as noop, aG as distanceBetweenPoints, aH as _setMinAndMaxByKey, aI as niceNum, aJ as almostWhole, aK as almostEquals, aL as _decimalPlaces, aM as _longestText, aN as _filterBetween, aO as _lookup } from './chunks/helpers.segment.mjs';
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export { d as defaults } from './chunks/helpers.segment.mjs';
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class Animator {
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constructor() {
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this._request = null;
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this._charts = new Map();
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this._running = false;
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this._lastDate = undefined;
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}
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_notify(chart, anims, date, type) {
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const callbacks = anims.listeners[type];
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const numSteps = anims.duration;
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callbacks.forEach(fn => fn({
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chart,
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initial: anims.initial,
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numSteps,
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currentStep: Math.min(date - anims.start, numSteps)
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}));
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}
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_refresh() {
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if (this._request) {
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return;
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}
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this._running = true;
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this._request = requestAnimFrame.call(window, () => {
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this._update();
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this._request = null;
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if (this._running) {
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this._refresh();
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}
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});
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}
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_update(date = Date.now()) {
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let remaining = 0;
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this._charts.forEach((anims, chart) => {
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if (!anims.running || !anims.items.length) {
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return;
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}
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const items = anims.items;
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let i = items.length - 1;
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let draw = false;
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let item;
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for (; i >= 0; --i) {
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item = items[i];
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if (item._active) {
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if (item._total > anims.duration) {
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anims.duration = item._total;
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}
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item.tick(date);
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draw = true;
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} else {
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items[i] = items[items.length - 1];
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items.pop();
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}
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}
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if (draw) {
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chart.draw();
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this._notify(chart, anims, date, 'progress');
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}
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if (!items.length) {
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anims.running = false;
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this._notify(chart, anims, date, 'complete');
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anims.initial = false;
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}
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remaining += items.length;
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});
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this._lastDate = date;
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if (remaining === 0) {
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this._running = false;
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}
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}
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_getAnims(chart) {
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const charts = this._charts;
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let anims = charts.get(chart);
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if (!anims) {
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anims = {
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running: false,
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initial: true,
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items: [],
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listeners: {
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complete: [],
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progress: []
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}
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};
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charts.set(chart, anims);
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}
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return anims;
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}
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listen(chart, event, cb) {
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this._getAnims(chart).listeners[event].push(cb);
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}
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add(chart, items) {
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if (!items || !items.length) {
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return;
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}
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this._getAnims(chart).items.push(...items);
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}
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has(chart) {
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return this._getAnims(chart).items.length > 0;
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}
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start(chart) {
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const anims = this._charts.get(chart);
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if (!anims) {
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return;
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}
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anims.running = true;
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anims.start = Date.now();
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anims.duration = anims.items.reduce((acc, cur) => Math.max(acc, cur._duration), 0);
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this._refresh();
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}
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running(chart) {
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if (!this._running) {
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return false;
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}
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const anims = this._charts.get(chart);
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if (!anims || !anims.running || !anims.items.length) {
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return false;
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}
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return true;
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}
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stop(chart) {
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const anims = this._charts.get(chart);
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if (!anims || !anims.items.length) {
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return;
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}
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const items = anims.items;
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let i = items.length - 1;
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for (; i >= 0; --i) {
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items[i].cancel();
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}
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anims.items = [];
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this._notify(chart, anims, Date.now(), 'complete');
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}
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remove(chart) {
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return this._charts.delete(chart);
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}
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}
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var animator = new Animator();
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const transparent = 'transparent';
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const interpolators = {
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boolean(from, to, factor) {
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return factor > 0.5 ? to : from;
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},
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color(from, to, factor) {
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const c0 = color(from || transparent);
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const c1 = c0.valid && color(to || transparent);
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return c1 && c1.valid
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? c1.mix(c0, factor).hexString()
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: to;
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},
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number(from, to, factor) {
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return from + (to - from) * factor;
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}
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};
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class Animation {
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constructor(cfg, target, prop, to) {
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const currentValue = target[prop];
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to = resolve([cfg.to, to, currentValue, cfg.from]);
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const from = resolve([cfg.from, currentValue, to]);
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this._active = true;
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this._fn = cfg.fn || interpolators[cfg.type || typeof from];
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this._easing = effects[cfg.easing] || effects.linear;
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this._start = Math.floor(Date.now() + (cfg.delay || 0));
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this._duration = this._total = Math.floor(cfg.duration);
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this._loop = !!cfg.loop;
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this._target = target;
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this._prop = prop;
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this._from = from;
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this._to = to;
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this._promises = undefined;
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}
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active() {
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return this._active;
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}
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update(cfg, to, date) {
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if (this._active) {
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this._notify(false);
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const currentValue = this._target[this._prop];
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const elapsed = date - this._start;
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const remain = this._duration - elapsed;
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this._start = date;
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this._duration = Math.floor(Math.max(remain, cfg.duration));
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this._total += elapsed;
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this._loop = !!cfg.loop;
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this._to = resolve([cfg.to, to, currentValue, cfg.from]);
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this._from = resolve([cfg.from, currentValue, to]);
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}
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}
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cancel() {
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if (this._active) {
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this.tick(Date.now());
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this._active = false;
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this._notify(false);
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}
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}
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tick(date) {
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const elapsed = date - this._start;
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const duration = this._duration;
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const prop = this._prop;
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const from = this._from;
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const loop = this._loop;
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const to = this._to;
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let factor;
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this._active = from !== to && (loop || (elapsed < duration));
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if (!this._active) {
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this._target[prop] = to;
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this._notify(true);
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return;
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}
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if (elapsed < 0) {
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this._target[prop] = from;
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return;
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}
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factor = (elapsed / duration) % 2;
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factor = loop && factor > 1 ? 2 - factor : factor;
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factor = this._easing(Math.min(1, Math.max(0, factor)));
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this._target[prop] = this._fn(from, to, factor);
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}
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wait() {
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const promises = this._promises || (this._promises = []);
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return new Promise((res, rej) => {
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promises.push({res, rej});
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});
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}
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_notify(resolved) {
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const method = resolved ? 'res' : 'rej';
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const promises = this._promises || [];
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for (let i = 0; i < promises.length; i++) {
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promises[i][method]();
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}
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}
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}
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const numbers = ['x', 'y', 'borderWidth', 'radius', 'tension'];
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const colors = ['color', 'borderColor', 'backgroundColor'];
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defaults.set('animation', {
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delay: undefined,
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duration: 1000,
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easing: 'easeOutQuart',
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fn: undefined,
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from: undefined,
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loop: undefined,
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to: undefined,
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type: undefined,
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});
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const animationOptions = Object.keys(defaults.animation);
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defaults.describe('animation', {
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_fallback: false,
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_indexable: false,
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_scriptable: (name) => name !== 'onProgress' && name !== 'onComplete' && name !== 'fn',
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});
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defaults.set('animations', {
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colors: {
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type: 'color',
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properties: colors
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},
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numbers: {
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type: 'number',
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properties: numbers
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},
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});
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defaults.describe('animations', {
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_fallback: 'animation',
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});
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defaults.set('transitions', {
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active: {
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animation: {
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duration: 400
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}
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},
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resize: {
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animation: {
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duration: 0
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}
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},
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show: {
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animations: {
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colors: {
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from: 'transparent'
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},
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visible: {
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type: 'boolean',
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duration: 0
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},
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}
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},
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hide: {
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animations: {
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colors: {
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to: 'transparent'
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},
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visible: {
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type: 'boolean',
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easing: 'linear',
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fn: v => v | 0
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},
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}
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}
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});
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class Animations {
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constructor(chart, config) {
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this._chart = chart;
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this._properties = new Map();
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this.configure(config);
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}
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configure(config) {
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if (!isObject(config)) {
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return;
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}
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const animatedProps = this._properties;
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Object.getOwnPropertyNames(config).forEach(key => {
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const cfg = config[key];
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if (!isObject(cfg)) {
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return;
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}
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const resolved = {};
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for (const option of animationOptions) {
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resolved[option] = cfg[option];
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}
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(isArray(cfg.properties) && cfg.properties || [key]).forEach((prop) => {
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if (prop === key || !animatedProps.has(prop)) {
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animatedProps.set(prop, resolved);
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}
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});
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});
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}
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_animateOptions(target, values) {
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const newOptions = values.options;
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const options = resolveTargetOptions(target, newOptions);
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if (!options) {
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return [];
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}
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const animations = this._createAnimations(options, newOptions);
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if (newOptions.$shared) {
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awaitAll(target.options.$animations, newOptions).then(() => {
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target.options = newOptions;
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}, () => {
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});
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}
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return animations;
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}
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_createAnimations(target, values) {
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const animatedProps = this._properties;
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const animations = [];
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const running = target.$animations || (target.$animations = {});
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const props = Object.keys(values);
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const date = Date.now();
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let i;
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for (i = props.length - 1; i >= 0; --i) {
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const prop = props[i];
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if (prop.charAt(0) === '$') {
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continue;
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}
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if (prop === 'options') {
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animations.push(...this._animateOptions(target, values));
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continue;
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}
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const value = values[prop];
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let animation = running[prop];
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const cfg = animatedProps.get(prop);
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if (animation) {
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if (cfg && animation.active()) {
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animation.update(cfg, value, date);
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continue;
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} else {
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animation.cancel();
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}
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}
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if (!cfg || !cfg.duration) {
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target[prop] = value;
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continue;
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}
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running[prop] = animation = new Animation(cfg, target, prop, value);
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animations.push(animation);
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}
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return animations;
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}
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update(target, values) {
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if (this._properties.size === 0) {
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Object.assign(target, values);
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return;
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}
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const animations = this._createAnimations(target, values);
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if (animations.length) {
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animator.add(this._chart, animations);
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return true;
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}
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}
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}
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function awaitAll(animations, properties) {
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const running = [];
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const keys = Object.keys(properties);
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for (let i = 0; i < keys.length; i++) {
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const anim = animations[keys[i]];
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if (anim && anim.active()) {
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running.push(anim.wait());
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}
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}
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return Promise.all(running);
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}
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function resolveTargetOptions(target, newOptions) {
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if (!newOptions) {
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return;
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}
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let options = target.options;
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if (!options) {
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target.options = newOptions;
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return;
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}
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if (options.$shared) {
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target.options = options = Object.assign({}, options, {$shared: false, $animations: {}});
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}
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return options;
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}
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function scaleClip(scale, allowedOverflow) {
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const opts = scale && scale.options || {};
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const reverse = opts.reverse;
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const min = opts.min === undefined ? allowedOverflow : 0;
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const max = opts.max === undefined ? allowedOverflow : 0;
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return {
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start: reverse ? max : min,
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end: reverse ? min : max
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};
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}
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function defaultClip(xScale, yScale, allowedOverflow) {
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if (allowedOverflow === false) {
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return false;
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}
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const x = scaleClip(xScale, allowedOverflow);
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const y = scaleClip(yScale, allowedOverflow);
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return {
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top: y.end,
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right: x.end,
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bottom: y.start,
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left: x.start
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};
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}
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function toClip(value) {
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let t, r, b, l;
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if (isObject(value)) {
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t = value.top;
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r = value.right;
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b = value.bottom;
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l = value.left;
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} else {
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t = r = b = l = value;
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}
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return {
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top: t,
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right: r,
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bottom: b,
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left: l,
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disabled: value === false
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};
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}
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function getSortedDatasetIndices(chart, filterVisible) {
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const keys = [];
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const metasets = chart._getSortedDatasetMetas(filterVisible);
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let i, ilen;
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for (i = 0, ilen = metasets.length; i < ilen; ++i) {
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keys.push(metasets[i].index);
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}
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return keys;
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}
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function applyStack(stack, value, dsIndex, options = {}) {
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const keys = stack.keys;
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const singleMode = options.mode === 'single';
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let i, ilen, datasetIndex, otherValue;
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if (value === null) {
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return;
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}
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for (i = 0, ilen = keys.length; i < ilen; ++i) {
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datasetIndex = +keys[i];
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if (datasetIndex === dsIndex) {
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if (options.all) {
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continue;
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}
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break;
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}
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otherValue = stack.values[datasetIndex];
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if (isNumberFinite(otherValue) && (singleMode || (value === 0 || sign(value) === sign(otherValue)))) {
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value += otherValue;
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}
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}
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return value;
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}
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function convertObjectDataToArray(data) {
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const keys = Object.keys(data);
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const adata = new Array(keys.length);
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let i, ilen, key;
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for (i = 0, ilen = keys.length; i < ilen; ++i) {
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key = keys[i];
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adata[i] = {
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x: key,
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y: data[key]
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};
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}
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return adata;
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}
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function isStacked(scale, meta) {
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const stacked = scale && scale.options.stacked;
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return stacked || (stacked === undefined && meta.stack !== undefined);
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}
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function getStackKey(indexScale, valueScale, meta) {
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return `${indexScale.id}.${valueScale.id}.${meta.stack || meta.type}`;
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}
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function getUserBounds(scale) {
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const {min, max, minDefined, maxDefined} = scale.getUserBounds();
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return {
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min: minDefined ? min : Number.NEGATIVE_INFINITY,
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max: maxDefined ? max : Number.POSITIVE_INFINITY
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|
};
|
|
}
|
|
function getOrCreateStack(stacks, stackKey, indexValue) {
|
|
const subStack = stacks[stackKey] || (stacks[stackKey] = {});
|
|
return subStack[indexValue] || (subStack[indexValue] = {});
|
|
}
|
|
function getLastIndexInStack(stack, vScale, positive, type) {
|
|
for (const meta of vScale.getMatchingVisibleMetas(type).reverse()) {
|
|
const value = stack[meta.index];
|
|
if ((positive && value > 0) || (!positive && value < 0)) {
|
|
return meta.index;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
function updateStacks(controller, parsed) {
|
|
const {chart, _cachedMeta: meta} = controller;
|
|
const stacks = chart._stacks || (chart._stacks = {});
|
|
const {iScale, vScale, index: datasetIndex} = meta;
|
|
const iAxis = iScale.axis;
|
|
const vAxis = vScale.axis;
|
|
const key = getStackKey(iScale, vScale, meta);
|
|
const ilen = parsed.length;
|
|
let stack;
|
|
for (let i = 0; i < ilen; ++i) {
|
|
const item = parsed[i];
|
|
const {[iAxis]: index, [vAxis]: value} = item;
|
|
const itemStacks = item._stacks || (item._stacks = {});
|
|
stack = itemStacks[vAxis] = getOrCreateStack(stacks, key, index);
|
|
stack[datasetIndex] = value;
|
|
stack._top = getLastIndexInStack(stack, vScale, true, meta.type);
|
|
stack._bottom = getLastIndexInStack(stack, vScale, false, meta.type);
|
|
}
|
|
}
|
|
function getFirstScaleId(chart, axis) {
|
|
const scales = chart.scales;
|
|
return Object.keys(scales).filter(key => scales[key].axis === axis).shift();
|
|
}
|
|
function createDatasetContext(parent, index) {
|
|
return createContext(parent,
|
|
{
|
|
active: false,
|
|
dataset: undefined,
|
|
datasetIndex: index,
|
|
index,
|
|
mode: 'default',
|
|
type: 'dataset'
|
|
}
|
|
);
|
|
}
|
|
function createDataContext(parent, index, element) {
|
|
return createContext(parent, {
|
|
active: false,
|
|
dataIndex: index,
|
|
parsed: undefined,
|
|
raw: undefined,
|
|
element,
|
|
index,
|
|
mode: 'default',
|
|
type: 'data'
|
|
});
|
|
}
|
|
function clearStacks(meta, items) {
|
|
const datasetIndex = meta.controller.index;
|
|
const axis = meta.vScale && meta.vScale.axis;
|
|
if (!axis) {
|
|
return;
|
|
}
|
|
items = items || meta._parsed;
|
|
for (const parsed of items) {
|
|
const stacks = parsed._stacks;
|
|
if (!stacks || stacks[axis] === undefined || stacks[axis][datasetIndex] === undefined) {
|
|
return;
|
|
}
|
|
delete stacks[axis][datasetIndex];
|
|
}
|
|
}
|
|
const isDirectUpdateMode = (mode) => mode === 'reset' || mode === 'none';
|
|
const cloneIfNotShared = (cached, shared) => shared ? cached : Object.assign({}, cached);
|
|
const createStack = (canStack, meta, chart) => canStack && !meta.hidden && meta._stacked
|
|
&& {keys: getSortedDatasetIndices(chart, true), values: null};
|
|
class DatasetController {
|
|
constructor(chart, datasetIndex) {
|
|
this.chart = chart;
|
|
this._ctx = chart.ctx;
|
|
this.index = datasetIndex;
|
|
this._cachedDataOpts = {};
|
|
this._cachedMeta = this.getMeta();
|
|
this._type = this._cachedMeta.type;
|
|
this.options = undefined;
|
|
this._parsing = false;
|
|
this._data = undefined;
|
|
this._objectData = undefined;
|
|
this._sharedOptions = undefined;
|
|
this._drawStart = undefined;
|
|
this._drawCount = undefined;
|
|
this.enableOptionSharing = false;
|
|
this.supportsDecimation = false;
|
|
this.$context = undefined;
|
|
this._syncList = [];
|
|
this.initialize();
|
|
}
|
|
initialize() {
|
|
const meta = this._cachedMeta;
|
|
this.configure();
|
|
this.linkScales();
|
|
meta._stacked = isStacked(meta.vScale, meta);
|
|
this.addElements();
|
|
}
|
|
updateIndex(datasetIndex) {
|
|
if (this.index !== datasetIndex) {
|
|
clearStacks(this._cachedMeta);
|
|
}
|
|
this.index = datasetIndex;
|
|
}
|
|
linkScales() {
|
|
const chart = this.chart;
|
|
const meta = this._cachedMeta;
|
|
const dataset = this.getDataset();
|
|
const chooseId = (axis, x, y, r) => axis === 'x' ? x : axis === 'r' ? r : y;
|
|
const xid = meta.xAxisID = valueOrDefault(dataset.xAxisID, getFirstScaleId(chart, 'x'));
|
|
const yid = meta.yAxisID = valueOrDefault(dataset.yAxisID, getFirstScaleId(chart, 'y'));
|
|
const rid = meta.rAxisID = valueOrDefault(dataset.rAxisID, getFirstScaleId(chart, 'r'));
|
|
const indexAxis = meta.indexAxis;
|
|
const iid = meta.iAxisID = chooseId(indexAxis, xid, yid, rid);
|
|
const vid = meta.vAxisID = chooseId(indexAxis, yid, xid, rid);
|
|
meta.xScale = this.getScaleForId(xid);
|
|
meta.yScale = this.getScaleForId(yid);
|
|
meta.rScale = this.getScaleForId(rid);
|
|
meta.iScale = this.getScaleForId(iid);
|
|
meta.vScale = this.getScaleForId(vid);
|
|
}
|
|
getDataset() {
|
|
return this.chart.data.datasets[this.index];
|
|
}
|
|
getMeta() {
|
|
return this.chart.getDatasetMeta(this.index);
|
|
}
|
|
getScaleForId(scaleID) {
|
|
return this.chart.scales[scaleID];
|
|
}
|
|
_getOtherScale(scale) {
|
|
const meta = this._cachedMeta;
|
|
return scale === meta.iScale
|
|
? meta.vScale
|
|
: meta.iScale;
|
|
}
|
|
reset() {
|
|
this._update('reset');
|
|
}
|
|
_destroy() {
|
|
const meta = this._cachedMeta;
|
|
if (this._data) {
|
|
unlistenArrayEvents(this._data, this);
|
|
}
|
|
if (meta._stacked) {
|
|
clearStacks(meta);
|
|
}
|
|
}
|
|
_dataCheck() {
|
|
const dataset = this.getDataset();
|
|
const data = dataset.data || (dataset.data = []);
|
|
const _data = this._data;
|
|
if (isObject(data)) {
|
|
this._data = convertObjectDataToArray(data);
|
|
} else if (_data !== data) {
|
|
if (_data) {
|
|
unlistenArrayEvents(_data, this);
|
|
const meta = this._cachedMeta;
|
|
clearStacks(meta);
|
|
meta._parsed = [];
|
|
}
|
|
if (data && Object.isExtensible(data)) {
|
|
listenArrayEvents(data, this);
|
|
}
|
|
this._syncList = [];
|
|
this._data = data;
|
|
}
|
|
}
|
|
addElements() {
|
|
const meta = this._cachedMeta;
|
|
this._dataCheck();
|
|
if (this.datasetElementType) {
|
|
meta.dataset = new this.datasetElementType();
|
|
}
|
|
}
|
|
buildOrUpdateElements(resetNewElements) {
|
|
const meta = this._cachedMeta;
|
|
const dataset = this.getDataset();
|
|
let stackChanged = false;
|
|
this._dataCheck();
|
|
const oldStacked = meta._stacked;
|
|
meta._stacked = isStacked(meta.vScale, meta);
|
|
if (meta.stack !== dataset.stack) {
|
|
stackChanged = true;
|
|
clearStacks(meta);
|
|
meta.stack = dataset.stack;
|
|
}
|
|
this._resyncElements(resetNewElements);
|
|
if (stackChanged || oldStacked !== meta._stacked) {
|
|
updateStacks(this, meta._parsed);
|
|
}
|
|
}
|
|
configure() {
|
|
const config = this.chart.config;
|
|
const scopeKeys = config.datasetScopeKeys(this._type);
|
|
const scopes = config.getOptionScopes(this.getDataset(), scopeKeys, true);
|
|
this.options = config.createResolver(scopes, this.getContext());
|
|
this._parsing = this.options.parsing;
|
|
this._cachedDataOpts = {};
|
|
}
|
|
parse(start, count) {
|
|
const {_cachedMeta: meta, _data: data} = this;
|
|
const {iScale, _stacked} = meta;
|
|
const iAxis = iScale.axis;
|
|
let sorted = start === 0 && count === data.length ? true : meta._sorted;
|
|
let prev = start > 0 && meta._parsed[start - 1];
|
|
let i, cur, parsed;
|
|
if (this._parsing === false) {
|
|
meta._parsed = data;
|
|
meta._sorted = true;
|
|
parsed = data;
|
|
} else {
|
|
if (isArray(data[start])) {
|
|
parsed = this.parseArrayData(meta, data, start, count);
|
|
} else if (isObject(data[start])) {
|
|
parsed = this.parseObjectData(meta, data, start, count);
|
|
} else {
|
|
parsed = this.parsePrimitiveData(meta, data, start, count);
|
|
}
|
|
const isNotInOrderComparedToPrev = () => cur[iAxis] === null || (prev && cur[iAxis] < prev[iAxis]);
|
|
for (i = 0; i < count; ++i) {
|
|
meta._parsed[i + start] = cur = parsed[i];
|
|
if (sorted) {
|
|
if (isNotInOrderComparedToPrev()) {
|
|
sorted = false;
|
|
}
|
|
prev = cur;
|
|
}
|
|
}
|
|
meta._sorted = sorted;
|
|
}
|
|
if (_stacked) {
|
|
updateStacks(this, parsed);
|
|
}
|
|
}
|
|
parsePrimitiveData(meta, data, start, count) {
|
|
const {iScale, vScale} = meta;
|
|
const iAxis = iScale.axis;
|
|
const vAxis = vScale.axis;
|
|
const labels = iScale.getLabels();
|
|
const singleScale = iScale === vScale;
|
|
const parsed = new Array(count);
|
|
let i, ilen, index;
|
|
for (i = 0, ilen = count; i < ilen; ++i) {
|
|
index = i + start;
|
|
parsed[i] = {
|
|
[iAxis]: singleScale || iScale.parse(labels[index], index),
|
|
[vAxis]: vScale.parse(data[index], index)
|
|
};
|
|
}
|
|
return parsed;
|
|
}
|
|
parseArrayData(meta, data, start, count) {
|
|
const {xScale, yScale} = meta;
|
|
const parsed = new Array(count);
|
|
let i, ilen, index, item;
|
|
for (i = 0, ilen = count; i < ilen; ++i) {
|
|
index = i + start;
|
|
item = data[index];
|
|
parsed[i] = {
|
|
x: xScale.parse(item[0], index),
|
|
y: yScale.parse(item[1], index)
|
|
};
|
|
}
|
|
return parsed;
|
|
}
|
|
parseObjectData(meta, data, start, count) {
|
|
const {xScale, yScale} = meta;
|
|
const {xAxisKey = 'x', yAxisKey = 'y'} = this._parsing;
|
|
const parsed = new Array(count);
|
|
let i, ilen, index, item;
|
|
for (i = 0, ilen = count; i < ilen; ++i) {
|
|
index = i + start;
|
|
item = data[index];
|
|
parsed[i] = {
|
|
x: xScale.parse(resolveObjectKey(item, xAxisKey), index),
|
|
y: yScale.parse(resolveObjectKey(item, yAxisKey), index)
|
|
};
|
|
}
|
|
return parsed;
|
|
}
|
|
getParsed(index) {
|
|
return this._cachedMeta._parsed[index];
|
|
}
|
|
getDataElement(index) {
|
|
return this._cachedMeta.data[index];
|
|
}
|
|
applyStack(scale, parsed, mode) {
|
|
const chart = this.chart;
|
|
const meta = this._cachedMeta;
|
|
const value = parsed[scale.axis];
|
|
const stack = {
|
|
keys: getSortedDatasetIndices(chart, true),
|
|
values: parsed._stacks[scale.axis]
|
|
};
|
|
return applyStack(stack, value, meta.index, {mode});
|
|
}
|
|
updateRangeFromParsed(range, scale, parsed, stack) {
|
|
const parsedValue = parsed[scale.axis];
|
|
let value = parsedValue === null ? NaN : parsedValue;
|
|
const values = stack && parsed._stacks[scale.axis];
|
|
if (stack && values) {
|
|
stack.values = values;
|
|
value = applyStack(stack, parsedValue, this._cachedMeta.index);
|
|
}
|
|
range.min = Math.min(range.min, value);
|
|
range.max = Math.max(range.max, value);
|
|
}
|
|
getMinMax(scale, canStack) {
|
|
const meta = this._cachedMeta;
|
|
const _parsed = meta._parsed;
|
|
const sorted = meta._sorted && scale === meta.iScale;
|
|
const ilen = _parsed.length;
|
|
const otherScale = this._getOtherScale(scale);
|
|
const stack = createStack(canStack, meta, this.chart);
|
|
const range = {min: Number.POSITIVE_INFINITY, max: Number.NEGATIVE_INFINITY};
|
|
const {min: otherMin, max: otherMax} = getUserBounds(otherScale);
|
|
let i, parsed;
|
|
function _skip() {
|
|
parsed = _parsed[i];
|
|
const otherValue = parsed[otherScale.axis];
|
|
return !isNumberFinite(parsed[scale.axis]) || otherMin > otherValue || otherMax < otherValue;
|
|
}
|
|
for (i = 0; i < ilen; ++i) {
|
|
if (_skip()) {
|
|
continue;
|
|
}
|
|
this.updateRangeFromParsed(range, scale, parsed, stack);
|
|
if (sorted) {
|
|
break;
|
|
}
|
|
}
|
|
if (sorted) {
|
|
for (i = ilen - 1; i >= 0; --i) {
|
|
if (_skip()) {
|
|
continue;
|
|
}
|
|
this.updateRangeFromParsed(range, scale, parsed, stack);
|
|
break;
|
|
}
|
|
}
|
|
return range;
|
|
}
|
|
getAllParsedValues(scale) {
|
|
const parsed = this._cachedMeta._parsed;
|
|
const values = [];
|
|
let i, ilen, value;
|
|
for (i = 0, ilen = parsed.length; i < ilen; ++i) {
|
|
value = parsed[i][scale.axis];
|
|
if (isNumberFinite(value)) {
|
|
values.push(value);
|
|
}
|
|
}
|
|
return values;
|
|
}
|
|
getMaxOverflow() {
|
|
return false;
|
|
}
|
|
getLabelAndValue(index) {
|
|
const meta = this._cachedMeta;
|
|
const iScale = meta.iScale;
|
|
const vScale = meta.vScale;
|
|
const parsed = this.getParsed(index);
|
|
return {
|
|
label: iScale ? '' + iScale.getLabelForValue(parsed[iScale.axis]) : '',
|
|
value: vScale ? '' + vScale.getLabelForValue(parsed[vScale.axis]) : ''
|
|
};
|
|
}
|
|
_update(mode) {
|
|
const meta = this._cachedMeta;
|
|
this.update(mode || 'default');
|
|
meta._clip = toClip(valueOrDefault(this.options.clip, defaultClip(meta.xScale, meta.yScale, this.getMaxOverflow())));
|
|
}
|
|
update(mode) {}
|
|
draw() {
|
|
const ctx = this._ctx;
|
|
const chart = this.chart;
|
|
const meta = this._cachedMeta;
|
|
const elements = meta.data || [];
|
|
const area = chart.chartArea;
|
|
const active = [];
|
|
const start = this._drawStart || 0;
|
|
const count = this._drawCount || (elements.length - start);
|
|
const drawActiveElementsOnTop = this.options.drawActiveElementsOnTop;
|
|
let i;
|
|
if (meta.dataset) {
|
|
meta.dataset.draw(ctx, area, start, count);
|
|
}
|
|
for (i = start; i < start + count; ++i) {
|
|
const element = elements[i];
|
|
if (element.hidden) {
|
|
continue;
|
|
}
|
|
if (element.active && drawActiveElementsOnTop) {
|
|
active.push(element);
|
|
} else {
|
|
element.draw(ctx, area);
|
|
}
|
|
}
|
|
for (i = 0; i < active.length; ++i) {
|
|
active[i].draw(ctx, area);
|
|
}
|
|
}
|
|
getStyle(index, active) {
|
|
const mode = active ? 'active' : 'default';
|
|
return index === undefined && this._cachedMeta.dataset
|
|
? this.resolveDatasetElementOptions(mode)
|
|
: this.resolveDataElementOptions(index || 0, mode);
|
|
}
|
|
getContext(index, active, mode) {
|
|
const dataset = this.getDataset();
|
|
let context;
|
|
if (index >= 0 && index < this._cachedMeta.data.length) {
|
|
const element = this._cachedMeta.data[index];
|
|
context = element.$context ||
|
|
(element.$context = createDataContext(this.getContext(), index, element));
|
|
context.parsed = this.getParsed(index);
|
|
context.raw = dataset.data[index];
|
|
context.index = context.dataIndex = index;
|
|
} else {
|
|
context = this.$context ||
|
|
(this.$context = createDatasetContext(this.chart.getContext(), this.index));
|
|
context.dataset = dataset;
|
|
context.index = context.datasetIndex = this.index;
|
|
}
|
|
context.active = !!active;
|
|
context.mode = mode;
|
|
return context;
|
|
}
|
|
resolveDatasetElementOptions(mode) {
|
|
return this._resolveElementOptions(this.datasetElementType.id, mode);
|
|
}
|
|
resolveDataElementOptions(index, mode) {
|
|
return this._resolveElementOptions(this.dataElementType.id, mode, index);
|
|
}
|
|
_resolveElementOptions(elementType, mode = 'default', index) {
|
|
const active = mode === 'active';
|
|
const cache = this._cachedDataOpts;
|
|
const cacheKey = elementType + '-' + mode;
|
|
const cached = cache[cacheKey];
|
|
const sharing = this.enableOptionSharing && defined(index);
|
|
if (cached) {
|
|
return cloneIfNotShared(cached, sharing);
|
|
}
|
|
const config = this.chart.config;
|
|
const scopeKeys = config.datasetElementScopeKeys(this._type, elementType);
|
|
const prefixes = active ? [`${elementType}Hover`, 'hover', elementType, ''] : [elementType, ''];
|
|
const scopes = config.getOptionScopes(this.getDataset(), scopeKeys);
|
|
const names = Object.keys(defaults.elements[elementType]);
|
|
const context = () => this.getContext(index, active);
|
|
const values = config.resolveNamedOptions(scopes, names, context, prefixes);
|
|
if (values.$shared) {
|
|
values.$shared = sharing;
|
|
cache[cacheKey] = Object.freeze(cloneIfNotShared(values, sharing));
|
|
}
|
|
return values;
|
|
}
|
|
_resolveAnimations(index, transition, active) {
|
|
const chart = this.chart;
|
|
const cache = this._cachedDataOpts;
|
|
const cacheKey = `animation-${transition}`;
|
|
const cached = cache[cacheKey];
|
|
if (cached) {
|
|
return cached;
|
|
}
|
|
let options;
|
|
if (chart.options.animation !== false) {
|
|
const config = this.chart.config;
|
|
const scopeKeys = config.datasetAnimationScopeKeys(this._type, transition);
|
|
const scopes = config.getOptionScopes(this.getDataset(), scopeKeys);
|
|
options = config.createResolver(scopes, this.getContext(index, active, transition));
|
|
}
|
|
const animations = new Animations(chart, options && options.animations);
|
|
if (options && options._cacheable) {
|
|
cache[cacheKey] = Object.freeze(animations);
|
|
}
|
|
return animations;
|
|
}
|
|
getSharedOptions(options) {
|
|
if (!options.$shared) {
|
|
return;
|
|
}
|
|
return this._sharedOptions || (this._sharedOptions = Object.assign({}, options));
|
|
}
|
|
includeOptions(mode, sharedOptions) {
|
|
return !sharedOptions || isDirectUpdateMode(mode) || this.chart._animationsDisabled;
|
|
}
|
|
_getSharedOptions(start, mode) {
|
|
const firstOpts = this.resolveDataElementOptions(start, mode);
|
|
const previouslySharedOptions = this._sharedOptions;
|
|
const sharedOptions = this.getSharedOptions(firstOpts);
|
|
const includeOptions = this.includeOptions(mode, sharedOptions) || (sharedOptions !== previouslySharedOptions);
|
|
this.updateSharedOptions(sharedOptions, mode, firstOpts);
|
|
return {sharedOptions, includeOptions};
|
|
}
|
|
updateElement(element, index, properties, mode) {
|
|
if (isDirectUpdateMode(mode)) {
|
|
Object.assign(element, properties);
|
|
} else {
|
|
this._resolveAnimations(index, mode).update(element, properties);
|
|
}
|
|
}
|
|
updateSharedOptions(sharedOptions, mode, newOptions) {
|
|
if (sharedOptions && !isDirectUpdateMode(mode)) {
|
|
this._resolveAnimations(undefined, mode).update(sharedOptions, newOptions);
|
|
}
|
|
}
|
|
_setStyle(element, index, mode, active) {
|
|
element.active = active;
|
|
const options = this.getStyle(index, active);
|
|
this._resolveAnimations(index, mode, active).update(element, {
|
|
options: (!active && this.getSharedOptions(options)) || options
|
|
});
|
|
}
|
|
removeHoverStyle(element, datasetIndex, index) {
|
|
this._setStyle(element, index, 'active', false);
|
|
}
|
|
setHoverStyle(element, datasetIndex, index) {
|
|
this._setStyle(element, index, 'active', true);
|
|
}
|
|
_removeDatasetHoverStyle() {
|
|
const element = this._cachedMeta.dataset;
|
|
if (element) {
|
|
this._setStyle(element, undefined, 'active', false);
|
|
}
|
|
}
|
|
_setDatasetHoverStyle() {
|
|
const element = this._cachedMeta.dataset;
|
|
if (element) {
|
|
this._setStyle(element, undefined, 'active', true);
|
|
}
|
|
}
|
|
_resyncElements(resetNewElements) {
|
|
const data = this._data;
|
|
const elements = this._cachedMeta.data;
|
|
for (const [method, arg1, arg2] of this._syncList) {
|
|
this[method](arg1, arg2);
|
|
}
|
|
this._syncList = [];
|
|
const numMeta = elements.length;
|
|
const numData = data.length;
|
|
const count = Math.min(numData, numMeta);
|
|
if (count) {
|
|
this.parse(0, count);
|
|
}
|
|
if (numData > numMeta) {
|
|
this._insertElements(numMeta, numData - numMeta, resetNewElements);
|
|
} else if (numData < numMeta) {
|
|
this._removeElements(numData, numMeta - numData);
|
|
}
|
|
}
|
|
_insertElements(start, count, resetNewElements = true) {
|
|
const meta = this._cachedMeta;
|
|
const data = meta.data;
|
|
const end = start + count;
|
|
let i;
|
|
const move = (arr) => {
|
|
arr.length += count;
|
|
for (i = arr.length - 1; i >= end; i--) {
|
|
arr[i] = arr[i - count];
|
|
}
|
|
};
|
|
move(data);
|
|
for (i = start; i < end; ++i) {
|
|
data[i] = new this.dataElementType();
|
|
}
|
|
if (this._parsing) {
|
|
move(meta._parsed);
|
|
}
|
|
this.parse(start, count);
|
|
if (resetNewElements) {
|
|
this.updateElements(data, start, count, 'reset');
|
|
}
|
|
}
|
|
updateElements(element, start, count, mode) {}
|
|
_removeElements(start, count) {
|
|
const meta = this._cachedMeta;
|
|
if (this._parsing) {
|
|
const removed = meta._parsed.splice(start, count);
|
|
if (meta._stacked) {
|
|
clearStacks(meta, removed);
|
|
}
|
|
}
|
|
meta.data.splice(start, count);
|
|
}
|
|
_sync(args) {
|
|
if (this._parsing) {
|
|
this._syncList.push(args);
|
|
} else {
|
|
const [method, arg1, arg2] = args;
|
|
this[method](arg1, arg2);
|
|
}
|
|
this.chart._dataChanges.push([this.index, ...args]);
|
|
}
|
|
_onDataPush() {
|
|
const count = arguments.length;
|
|
this._sync(['_insertElements', this.getDataset().data.length - count, count]);
|
|
}
|
|
_onDataPop() {
|
|
this._sync(['_removeElements', this._cachedMeta.data.length - 1, 1]);
|
|
}
|
|
_onDataShift() {
|
|
this._sync(['_removeElements', 0, 1]);
|
|
}
|
|
_onDataSplice(start, count) {
|
|
if (count) {
|
|
this._sync(['_removeElements', start, count]);
|
|
}
|
|
const newCount = arguments.length - 2;
|
|
if (newCount) {
|
|
this._sync(['_insertElements', start, newCount]);
|
|
}
|
|
}
|
|
_onDataUnshift() {
|
|
this._sync(['_insertElements', 0, arguments.length]);
|
|
}
|
|
}
|
|
DatasetController.defaults = {};
|
|
DatasetController.prototype.datasetElementType = null;
|
|
DatasetController.prototype.dataElementType = null;
|
|
|
|
function getAllScaleValues(scale, type) {
|
|
if (!scale._cache.$bar) {
|
|
const visibleMetas = scale.getMatchingVisibleMetas(type);
|
|
let values = [];
|
|
for (let i = 0, ilen = visibleMetas.length; i < ilen; i++) {
|
|
values = values.concat(visibleMetas[i].controller.getAllParsedValues(scale));
|
|
}
|
|
scale._cache.$bar = _arrayUnique(values.sort((a, b) => a - b));
|
|
}
|
|
return scale._cache.$bar;
|
|
}
|
|
function computeMinSampleSize(meta) {
|
|
const scale = meta.iScale;
|
|
const values = getAllScaleValues(scale, meta.type);
|
|
let min = scale._length;
|
|
let i, ilen, curr, prev;
|
|
const updateMinAndPrev = () => {
|
|
if (curr === 32767 || curr === -32768) {
|
|
return;
|
|
}
|
|
if (defined(prev)) {
|
|
min = Math.min(min, Math.abs(curr - prev) || min);
|
|
}
|
|
prev = curr;
|
|
};
|
|
for (i = 0, ilen = values.length; i < ilen; ++i) {
|
|
curr = scale.getPixelForValue(values[i]);
|
|
updateMinAndPrev();
|
|
}
|
|
prev = undefined;
|
|
for (i = 0, ilen = scale.ticks.length; i < ilen; ++i) {
|
|
curr = scale.getPixelForTick(i);
|
|
updateMinAndPrev();
|
|
}
|
|
return min;
|
|
}
|
|
function computeFitCategoryTraits(index, ruler, options, stackCount) {
|
|
const thickness = options.barThickness;
|
|
let size, ratio;
|
|
if (isNullOrUndef(thickness)) {
|
|
size = ruler.min * options.categoryPercentage;
|
|
ratio = options.barPercentage;
|
|
} else {
|
|
size = thickness * stackCount;
|
|
ratio = 1;
|
|
}
|
|
return {
|
|
chunk: size / stackCount,
|
|
ratio,
|
|
start: ruler.pixels[index] - (size / 2)
|
|
};
|
|
}
|
|
function computeFlexCategoryTraits(index, ruler, options, stackCount) {
|
|
const pixels = ruler.pixels;
|
|
const curr = pixels[index];
|
|
let prev = index > 0 ? pixels[index - 1] : null;
|
|
let next = index < pixels.length - 1 ? pixels[index + 1] : null;
|
|
const percent = options.categoryPercentage;
|
|
if (prev === null) {
|
|
prev = curr - (next === null ? ruler.end - ruler.start : next - curr);
|
|
}
|
|
if (next === null) {
|
|
next = curr + curr - prev;
|
|
}
|
|
const start = curr - (curr - Math.min(prev, next)) / 2 * percent;
|
|
const size = Math.abs(next - prev) / 2 * percent;
|
|
return {
|
|
chunk: size / stackCount,
|
|
ratio: options.barPercentage,
|
|
start
|
|
};
|
|
}
|
|
function parseFloatBar(entry, item, vScale, i) {
|
|
const startValue = vScale.parse(entry[0], i);
|
|
const endValue = vScale.parse(entry[1], i);
|
|
const min = Math.min(startValue, endValue);
|
|
const max = Math.max(startValue, endValue);
|
|
let barStart = min;
|
|
let barEnd = max;
|
|
if (Math.abs(min) > Math.abs(max)) {
|
|
barStart = max;
|
|
barEnd = min;
|
|
}
|
|
item[vScale.axis] = barEnd;
|
|
item._custom = {
|
|
barStart,
|
|
barEnd,
|
|
start: startValue,
|
|
end: endValue,
|
|
min,
|
|
max
|
|
};
|
|
}
|
|
function parseValue(entry, item, vScale, i) {
|
|
if (isArray(entry)) {
|
|
parseFloatBar(entry, item, vScale, i);
|
|
} else {
|
|
item[vScale.axis] = vScale.parse(entry, i);
|
|
}
|
|
return item;
|
|
}
|
|
function parseArrayOrPrimitive(meta, data, start, count) {
|
|
const iScale = meta.iScale;
|
|
const vScale = meta.vScale;
|
|
const labels = iScale.getLabels();
|
|
const singleScale = iScale === vScale;
|
|
const parsed = [];
|
|
let i, ilen, item, entry;
|
|
for (i = start, ilen = start + count; i < ilen; ++i) {
|
|
entry = data[i];
|
|
item = {};
|
|
item[iScale.axis] = singleScale || iScale.parse(labels[i], i);
|
|
parsed.push(parseValue(entry, item, vScale, i));
|
|
}
|
|
return parsed;
|
|
}
|
|
function isFloatBar(custom) {
|
|
return custom && custom.barStart !== undefined && custom.barEnd !== undefined;
|
|
}
|
|
function barSign(size, vScale, actualBase) {
|
|
if (size !== 0) {
|
|
return sign(size);
|
|
}
|
|
return (vScale.isHorizontal() ? 1 : -1) * (vScale.min >= actualBase ? 1 : -1);
|
|
}
|
|
function borderProps(properties) {
|
|
let reverse, start, end, top, bottom;
|
|
if (properties.horizontal) {
|
|
reverse = properties.base > properties.x;
|
|
start = 'left';
|
|
end = 'right';
|
|
} else {
|
|
reverse = properties.base < properties.y;
|
|
start = 'bottom';
|
|
end = 'top';
|
|
}
|
|
if (reverse) {
|
|
top = 'end';
|
|
bottom = 'start';
|
|
} else {
|
|
top = 'start';
|
|
bottom = 'end';
|
|
}
|
|
return {start, end, reverse, top, bottom};
|
|
}
|
|
function setBorderSkipped(properties, options, stack, index) {
|
|
let edge = options.borderSkipped;
|
|
const res = {};
|
|
if (!edge) {
|
|
properties.borderSkipped = res;
|
|
return;
|
|
}
|
|
if (edge === true) {
|
|
properties.borderSkipped = {top: true, right: true, bottom: true, left: true};
|
|
return;
|
|
}
|
|
const {start, end, reverse, top, bottom} = borderProps(properties);
|
|
if (edge === 'middle' && stack) {
|
|
properties.enableBorderRadius = true;
|
|
if ((stack._top || 0) === index) {
|
|
edge = top;
|
|
} else if ((stack._bottom || 0) === index) {
|
|
edge = bottom;
|
|
} else {
|
|
res[parseEdge(bottom, start, end, reverse)] = true;
|
|
edge = top;
|
|
}
|
|
}
|
|
res[parseEdge(edge, start, end, reverse)] = true;
|
|
properties.borderSkipped = res;
|
|
}
|
|
function parseEdge(edge, a, b, reverse) {
|
|
if (reverse) {
|
|
edge = swap(edge, a, b);
|
|
edge = startEnd(edge, b, a);
|
|
} else {
|
|
edge = startEnd(edge, a, b);
|
|
}
|
|
return edge;
|
|
}
|
|
function swap(orig, v1, v2) {
|
|
return orig === v1 ? v2 : orig === v2 ? v1 : orig;
|
|
}
|
|
function startEnd(v, start, end) {
|
|
return v === 'start' ? start : v === 'end' ? end : v;
|
|
}
|
|
function setInflateAmount(properties, {inflateAmount}, ratio) {
|
|
properties.inflateAmount = inflateAmount === 'auto'
|
|
? ratio === 1 ? 0.33 : 0
|
|
: inflateAmount;
|
|
}
|
|
class BarController extends DatasetController {
|
|
parsePrimitiveData(meta, data, start, count) {
|
|
return parseArrayOrPrimitive(meta, data, start, count);
|
|
}
|
|
parseArrayData(meta, data, start, count) {
|
|
return parseArrayOrPrimitive(meta, data, start, count);
|
|
}
|
|
parseObjectData(meta, data, start, count) {
|
|
const {iScale, vScale} = meta;
|
|
const {xAxisKey = 'x', yAxisKey = 'y'} = this._parsing;
|
|
const iAxisKey = iScale.axis === 'x' ? xAxisKey : yAxisKey;
|
|
const vAxisKey = vScale.axis === 'x' ? xAxisKey : yAxisKey;
|
|
const parsed = [];
|
|
let i, ilen, item, obj;
|
|
for (i = start, ilen = start + count; i < ilen; ++i) {
|
|
obj = data[i];
|
|
item = {};
|
|
item[iScale.axis] = iScale.parse(resolveObjectKey(obj, iAxisKey), i);
|
|
parsed.push(parseValue(resolveObjectKey(obj, vAxisKey), item, vScale, i));
|
|
}
|
|
return parsed;
|
|
}
|
|
updateRangeFromParsed(range, scale, parsed, stack) {
|
|
super.updateRangeFromParsed(range, scale, parsed, stack);
|
|
const custom = parsed._custom;
|
|
if (custom && scale === this._cachedMeta.vScale) {
|
|
range.min = Math.min(range.min, custom.min);
|
|
range.max = Math.max(range.max, custom.max);
|
|
}
|
|
}
|
|
getMaxOverflow() {
|
|
return 0;
|
|
}
|
|
getLabelAndValue(index) {
|
|
const meta = this._cachedMeta;
|
|
const {iScale, vScale} = meta;
|
|
const parsed = this.getParsed(index);
|
|
const custom = parsed._custom;
|
|
const value = isFloatBar(custom)
|
|
? '[' + custom.start + ', ' + custom.end + ']'
|
|
: '' + vScale.getLabelForValue(parsed[vScale.axis]);
|
|
return {
|
|
label: '' + iScale.getLabelForValue(parsed[iScale.axis]),
|
|
value
|
|
};
|
|
}
|
|
initialize() {
|
|
this.enableOptionSharing = true;
|
|
super.initialize();
|
|
const meta = this._cachedMeta;
|
|
meta.stack = this.getDataset().stack;
|
|
}
|
|
update(mode) {
|
|
const meta = this._cachedMeta;
|
|
this.updateElements(meta.data, 0, meta.data.length, mode);
|
|
}
|
|
updateElements(bars, start, count, mode) {
|
|
const reset = mode === 'reset';
|
|
const {index, _cachedMeta: {vScale}} = this;
|
|
const base = vScale.getBasePixel();
|
|
const horizontal = vScale.isHorizontal();
|
|
const ruler = this._getRuler();
|
|
const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);
|
|
for (let i = start; i < start + count; i++) {
|
|
const parsed = this.getParsed(i);
|
|
const vpixels = reset || isNullOrUndef(parsed[vScale.axis]) ? {base, head: base} : this._calculateBarValuePixels(i);
|
|
const ipixels = this._calculateBarIndexPixels(i, ruler);
|
|
const stack = (parsed._stacks || {})[vScale.axis];
|
|
const properties = {
|
|
horizontal,
|
|
base: vpixels.base,
|
|
enableBorderRadius: !stack || isFloatBar(parsed._custom) || (index === stack._top || index === stack._bottom),
|
|
x: horizontal ? vpixels.head : ipixels.center,
|
|
y: horizontal ? ipixels.center : vpixels.head,
|
|
height: horizontal ? ipixels.size : Math.abs(vpixels.size),
|
|
width: horizontal ? Math.abs(vpixels.size) : ipixels.size
|
|
};
|
|
if (includeOptions) {
|
|
properties.options = sharedOptions || this.resolveDataElementOptions(i, bars[i].active ? 'active' : mode);
|
|
}
|
|
const options = properties.options || bars[i].options;
|
|
setBorderSkipped(properties, options, stack, index);
|
|
setInflateAmount(properties, options, ruler.ratio);
|
|
this.updateElement(bars[i], i, properties, mode);
|
|
}
|
|
}
|
|
_getStacks(last, dataIndex) {
|
|
const {iScale} = this._cachedMeta;
|
|
const metasets = iScale.getMatchingVisibleMetas(this._type)
|
|
.filter(meta => meta.controller.options.grouped);
|
|
const stacked = iScale.options.stacked;
|
|
const stacks = [];
|
|
const skipNull = (meta) => {
|
|
const parsed = meta.controller.getParsed(dataIndex);
|
|
const val = parsed && parsed[meta.vScale.axis];
|
|
if (isNullOrUndef(val) || isNaN(val)) {
|
|
return true;
|
|
}
|
|
};
|
|
for (const meta of metasets) {
|
|
if (dataIndex !== undefined && skipNull(meta)) {
|
|
continue;
|
|
}
|
|
if (stacked === false || stacks.indexOf(meta.stack) === -1 ||
|
|
(stacked === undefined && meta.stack === undefined)) {
|
|
stacks.push(meta.stack);
|
|
}
|
|
if (meta.index === last) {
|
|
break;
|
|
}
|
|
}
|
|
if (!stacks.length) {
|
|
stacks.push(undefined);
|
|
}
|
|
return stacks;
|
|
}
|
|
_getStackCount(index) {
|
|
return this._getStacks(undefined, index).length;
|
|
}
|
|
_getStackIndex(datasetIndex, name, dataIndex) {
|
|
const stacks = this._getStacks(datasetIndex, dataIndex);
|
|
const index = (name !== undefined)
|
|
? stacks.indexOf(name)
|
|
: -1;
|
|
return (index === -1)
|
|
? stacks.length - 1
|
|
: index;
|
|
}
|
|
_getRuler() {
|
|
const opts = this.options;
|
|
const meta = this._cachedMeta;
|
|
const iScale = meta.iScale;
|
|
const pixels = [];
|
|
let i, ilen;
|
|
for (i = 0, ilen = meta.data.length; i < ilen; ++i) {
|
|
pixels.push(iScale.getPixelForValue(this.getParsed(i)[iScale.axis], i));
|
|
}
|
|
const barThickness = opts.barThickness;
|
|
const min = barThickness || computeMinSampleSize(meta);
|
|
return {
|
|
min,
|
|
pixels,
|
|
start: iScale._startPixel,
|
|
end: iScale._endPixel,
|
|
stackCount: this._getStackCount(),
|
|
scale: iScale,
|
|
grouped: opts.grouped,
|
|
ratio: barThickness ? 1 : opts.categoryPercentage * opts.barPercentage
|
|
};
|
|
}
|
|
_calculateBarValuePixels(index) {
|
|
const {_cachedMeta: {vScale, _stacked}, options: {base: baseValue, minBarLength}} = this;
|
|
const actualBase = baseValue || 0;
|
|
const parsed = this.getParsed(index);
|
|
const custom = parsed._custom;
|
|
const floating = isFloatBar(custom);
|
|
let value = parsed[vScale.axis];
|
|
let start = 0;
|
|
let length = _stacked ? this.applyStack(vScale, parsed, _stacked) : value;
|
|
let head, size;
|
|
if (length !== value) {
|
|
start = length - value;
|
|
length = value;
|
|
}
|
|
if (floating) {
|
|
value = custom.barStart;
|
|
length = custom.barEnd - custom.barStart;
|
|
if (value !== 0 && sign(value) !== sign(custom.barEnd)) {
|
|
start = 0;
|
|
}
|
|
start += value;
|
|
}
|
|
const startValue = !isNullOrUndef(baseValue) && !floating ? baseValue : start;
|
|
let base = vScale.getPixelForValue(startValue);
|
|
if (this.chart.getDataVisibility(index)) {
|
|
head = vScale.getPixelForValue(start + length);
|
|
} else {
|
|
head = base;
|
|
}
|
|
size = head - base;
|
|
if (Math.abs(size) < minBarLength) {
|
|
size = barSign(size, vScale, actualBase) * minBarLength;
|
|
if (value === actualBase) {
|
|
base -= size / 2;
|
|
}
|
|
const startPixel = vScale.getPixelForDecimal(0);
|
|
const endPixel = vScale.getPixelForDecimal(1);
|
|
const min = Math.min(startPixel, endPixel);
|
|
const max = Math.max(startPixel, endPixel);
|
|
base = Math.max(Math.min(base, max), min);
|
|
head = base + size;
|
|
}
|
|
if (base === vScale.getPixelForValue(actualBase)) {
|
|
const halfGrid = sign(size) * vScale.getLineWidthForValue(actualBase) / 2;
|
|
base += halfGrid;
|
|
size -= halfGrid;
|
|
}
|
|
return {
|
|
size,
|
|
base,
|
|
head,
|
|
center: head + size / 2
|
|
};
|
|
}
|
|
_calculateBarIndexPixels(index, ruler) {
|
|
const scale = ruler.scale;
|
|
const options = this.options;
|
|
const skipNull = options.skipNull;
|
|
const maxBarThickness = valueOrDefault(options.maxBarThickness, Infinity);
|
|
let center, size;
|
|
if (ruler.grouped) {
|
|
const stackCount = skipNull ? this._getStackCount(index) : ruler.stackCount;
|
|
const range = options.barThickness === 'flex'
|
|
? computeFlexCategoryTraits(index, ruler, options, stackCount)
|
|
: computeFitCategoryTraits(index, ruler, options, stackCount);
|
|
const stackIndex = this._getStackIndex(this.index, this._cachedMeta.stack, skipNull ? index : undefined);
|
|
center = range.start + (range.chunk * stackIndex) + (range.chunk / 2);
|
|
size = Math.min(maxBarThickness, range.chunk * range.ratio);
|
|
} else {
|
|
center = scale.getPixelForValue(this.getParsed(index)[scale.axis], index);
|
|
size = Math.min(maxBarThickness, ruler.min * ruler.ratio);
|
|
}
|
|
return {
|
|
base: center - size / 2,
|
|
head: center + size / 2,
|
|
center,
|
|
size
|
|
};
|
|
}
|
|
draw() {
|
|
const meta = this._cachedMeta;
|
|
const vScale = meta.vScale;
|
|
const rects = meta.data;
|
|
const ilen = rects.length;
|
|
let i = 0;
|
|
for (; i < ilen; ++i) {
|
|
if (this.getParsed(i)[vScale.axis] !== null) {
|
|
rects[i].draw(this._ctx);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
BarController.id = 'bar';
|
|
BarController.defaults = {
|
|
datasetElementType: false,
|
|
dataElementType: 'bar',
|
|
categoryPercentage: 0.8,
|
|
barPercentage: 0.9,
|
|
grouped: true,
|
|
animations: {
|
|
numbers: {
|
|
type: 'number',
|
|
properties: ['x', 'y', 'base', 'width', 'height']
|
|
}
|
|
}
|
|
};
|
|
BarController.overrides = {
|
|
scales: {
|
|
_index_: {
|
|
type: 'category',
|
|
offset: true,
|
|
grid: {
|
|
offset: true
|
|
}
|
|
},
|
|
_value_: {
|
|
type: 'linear',
|
|
beginAtZero: true,
|
|
}
|
|
}
|
|
};
|
|
|
|
class BubbleController extends DatasetController {
|
|
initialize() {
|
|
this.enableOptionSharing = true;
|
|
super.initialize();
|
|
}
|
|
parsePrimitiveData(meta, data, start, count) {
|
|
const parsed = super.parsePrimitiveData(meta, data, start, count);
|
|
for (let i = 0; i < parsed.length; i++) {
|
|
parsed[i]._custom = this.resolveDataElementOptions(i + start).radius;
|
|
}
|
|
return parsed;
|
|
}
|
|
parseArrayData(meta, data, start, count) {
|
|
const parsed = super.parseArrayData(meta, data, start, count);
|
|
for (let i = 0; i < parsed.length; i++) {
|
|
const item = data[start + i];
|
|
parsed[i]._custom = valueOrDefault(item[2], this.resolveDataElementOptions(i + start).radius);
|
|
}
|
|
return parsed;
|
|
}
|
|
parseObjectData(meta, data, start, count) {
|
|
const parsed = super.parseObjectData(meta, data, start, count);
|
|
for (let i = 0; i < parsed.length; i++) {
|
|
const item = data[start + i];
|
|
parsed[i]._custom = valueOrDefault(item && item.r && +item.r, this.resolveDataElementOptions(i + start).radius);
|
|
}
|
|
return parsed;
|
|
}
|
|
getMaxOverflow() {
|
|
const data = this._cachedMeta.data;
|
|
let max = 0;
|
|
for (let i = data.length - 1; i >= 0; --i) {
|
|
max = Math.max(max, data[i].size(this.resolveDataElementOptions(i)) / 2);
|
|
}
|
|
return max > 0 && max;
|
|
}
|
|
getLabelAndValue(index) {
|
|
const meta = this._cachedMeta;
|
|
const {xScale, yScale} = meta;
|
|
const parsed = this.getParsed(index);
|
|
const x = xScale.getLabelForValue(parsed.x);
|
|
const y = yScale.getLabelForValue(parsed.y);
|
|
const r = parsed._custom;
|
|
return {
|
|
label: meta.label,
|
|
value: '(' + x + ', ' + y + (r ? ', ' + r : '') + ')'
|
|
};
|
|
}
|
|
update(mode) {
|
|
const points = this._cachedMeta.data;
|
|
this.updateElements(points, 0, points.length, mode);
|
|
}
|
|
updateElements(points, start, count, mode) {
|
|
const reset = mode === 'reset';
|
|
const {iScale, vScale} = this._cachedMeta;
|
|
const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);
|
|
const iAxis = iScale.axis;
|
|
const vAxis = vScale.axis;
|
|
for (let i = start; i < start + count; i++) {
|
|
const point = points[i];
|
|
const parsed = !reset && this.getParsed(i);
|
|
const properties = {};
|
|
const iPixel = properties[iAxis] = reset ? iScale.getPixelForDecimal(0.5) : iScale.getPixelForValue(parsed[iAxis]);
|
|
const vPixel = properties[vAxis] = reset ? vScale.getBasePixel() : vScale.getPixelForValue(parsed[vAxis]);
|
|
properties.skip = isNaN(iPixel) || isNaN(vPixel);
|
|
if (includeOptions) {
|
|
properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);
|
|
if (reset) {
|
|
properties.options.radius = 0;
|
|
}
|
|
}
|
|
this.updateElement(point, i, properties, mode);
|
|
}
|
|
}
|
|
resolveDataElementOptions(index, mode) {
|
|
const parsed = this.getParsed(index);
|
|
let values = super.resolveDataElementOptions(index, mode);
|
|
if (values.$shared) {
|
|
values = Object.assign({}, values, {$shared: false});
|
|
}
|
|
const radius = values.radius;
|
|
if (mode !== 'active') {
|
|
values.radius = 0;
|
|
}
|
|
values.radius += valueOrDefault(parsed && parsed._custom, radius);
|
|
return values;
|
|
}
|
|
}
|
|
BubbleController.id = 'bubble';
|
|
BubbleController.defaults = {
|
|
datasetElementType: false,
|
|
dataElementType: 'point',
|
|
animations: {
|
|
numbers: {
|
|
type: 'number',
|
|
properties: ['x', 'y', 'borderWidth', 'radius']
|
|
}
|
|
}
|
|
};
|
|
BubbleController.overrides = {
|
|
scales: {
|
|
x: {
|
|
type: 'linear'
|
|
},
|
|
y: {
|
|
type: 'linear'
|
|
}
|
|
},
|
|
plugins: {
|
|
tooltip: {
|
|
callbacks: {
|
|
title() {
|
|
return '';
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
function getRatioAndOffset(rotation, circumference, cutout) {
|
|
let ratioX = 1;
|
|
let ratioY = 1;
|
|
let offsetX = 0;
|
|
let offsetY = 0;
|
|
if (circumference < TAU) {
|
|
const startAngle = rotation;
|
|
const endAngle = startAngle + circumference;
|
|
const startX = Math.cos(startAngle);
|
|
const startY = Math.sin(startAngle);
|
|
const endX = Math.cos(endAngle);
|
|
const endY = Math.sin(endAngle);
|
|
const calcMax = (angle, a, b) => _angleBetween(angle, startAngle, endAngle, true) ? 1 : Math.max(a, a * cutout, b, b * cutout);
|
|
const calcMin = (angle, a, b) => _angleBetween(angle, startAngle, endAngle, true) ? -1 : Math.min(a, a * cutout, b, b * cutout);
|
|
const maxX = calcMax(0, startX, endX);
|
|
const maxY = calcMax(HALF_PI, startY, endY);
|
|
const minX = calcMin(PI, startX, endX);
|
|
const minY = calcMin(PI + HALF_PI, startY, endY);
|
|
ratioX = (maxX - minX) / 2;
|
|
ratioY = (maxY - minY) / 2;
|
|
offsetX = -(maxX + minX) / 2;
|
|
offsetY = -(maxY + minY) / 2;
|
|
}
|
|
return {ratioX, ratioY, offsetX, offsetY};
|
|
}
|
|
class DoughnutController extends DatasetController {
|
|
constructor(chart, datasetIndex) {
|
|
super(chart, datasetIndex);
|
|
this.enableOptionSharing = true;
|
|
this.innerRadius = undefined;
|
|
this.outerRadius = undefined;
|
|
this.offsetX = undefined;
|
|
this.offsetY = undefined;
|
|
}
|
|
linkScales() {}
|
|
parse(start, count) {
|
|
const data = this.getDataset().data;
|
|
const meta = this._cachedMeta;
|
|
if (this._parsing === false) {
|
|
meta._parsed = data;
|
|
} else {
|
|
let getter = (i) => +data[i];
|
|
if (isObject(data[start])) {
|
|
const {key = 'value'} = this._parsing;
|
|
getter = (i) => +resolveObjectKey(data[i], key);
|
|
}
|
|
let i, ilen;
|
|
for (i = start, ilen = start + count; i < ilen; ++i) {
|
|
meta._parsed[i] = getter(i);
|
|
}
|
|
}
|
|
}
|
|
_getRotation() {
|
|
return toRadians(this.options.rotation - 90);
|
|
}
|
|
_getCircumference() {
|
|
return toRadians(this.options.circumference);
|
|
}
|
|
_getRotationExtents() {
|
|
let min = TAU;
|
|
let max = -TAU;
|
|
for (let i = 0; i < this.chart.data.datasets.length; ++i) {
|
|
if (this.chart.isDatasetVisible(i)) {
|
|
const controller = this.chart.getDatasetMeta(i).controller;
|
|
const rotation = controller._getRotation();
|
|
const circumference = controller._getCircumference();
|
|
min = Math.min(min, rotation);
|
|
max = Math.max(max, rotation + circumference);
|
|
}
|
|
}
|
|
return {
|
|
rotation: min,
|
|
circumference: max - min,
|
|
};
|
|
}
|
|
update(mode) {
|
|
const chart = this.chart;
|
|
const {chartArea} = chart;
|
|
const meta = this._cachedMeta;
|
|
const arcs = meta.data;
|
|
const spacing = this.getMaxBorderWidth() + this.getMaxOffset(arcs) + this.options.spacing;
|
|
const maxSize = Math.max((Math.min(chartArea.width, chartArea.height) - spacing) / 2, 0);
|
|
const cutout = Math.min(toPercentage(this.options.cutout, maxSize), 1);
|
|
const chartWeight = this._getRingWeight(this.index);
|
|
const {circumference, rotation} = this._getRotationExtents();
|
|
const {ratioX, ratioY, offsetX, offsetY} = getRatioAndOffset(rotation, circumference, cutout);
|
|
const maxWidth = (chartArea.width - spacing) / ratioX;
|
|
const maxHeight = (chartArea.height - spacing) / ratioY;
|
|
const maxRadius = Math.max(Math.min(maxWidth, maxHeight) / 2, 0);
|
|
const outerRadius = toDimension(this.options.radius, maxRadius);
|
|
const innerRadius = Math.max(outerRadius * cutout, 0);
|
|
const radiusLength = (outerRadius - innerRadius) / this._getVisibleDatasetWeightTotal();
|
|
this.offsetX = offsetX * outerRadius;
|
|
this.offsetY = offsetY * outerRadius;
|
|
meta.total = this.calculateTotal();
|
|
this.outerRadius = outerRadius - radiusLength * this._getRingWeightOffset(this.index);
|
|
this.innerRadius = Math.max(this.outerRadius - radiusLength * chartWeight, 0);
|
|
this.updateElements(arcs, 0, arcs.length, mode);
|
|
}
|
|
_circumference(i, reset) {
|
|
const opts = this.options;
|
|
const meta = this._cachedMeta;
|
|
const circumference = this._getCircumference();
|
|
if ((reset && opts.animation.animateRotate) || !this.chart.getDataVisibility(i) || meta._parsed[i] === null || meta.data[i].hidden) {
|
|
return 0;
|
|
}
|
|
return this.calculateCircumference(meta._parsed[i] * circumference / TAU);
|
|
}
|
|
updateElements(arcs, start, count, mode) {
|
|
const reset = mode === 'reset';
|
|
const chart = this.chart;
|
|
const chartArea = chart.chartArea;
|
|
const opts = chart.options;
|
|
const animationOpts = opts.animation;
|
|
const centerX = (chartArea.left + chartArea.right) / 2;
|
|
const centerY = (chartArea.top + chartArea.bottom) / 2;
|
|
const animateScale = reset && animationOpts.animateScale;
|
|
const innerRadius = animateScale ? 0 : this.innerRadius;
|
|
const outerRadius = animateScale ? 0 : this.outerRadius;
|
|
const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);
|
|
let startAngle = this._getRotation();
|
|
let i;
|
|
for (i = 0; i < start; ++i) {
|
|
startAngle += this._circumference(i, reset);
|
|
}
|
|
for (i = start; i < start + count; ++i) {
|
|
const circumference = this._circumference(i, reset);
|
|
const arc = arcs[i];
|
|
const properties = {
|
|
x: centerX + this.offsetX,
|
|
y: centerY + this.offsetY,
|
|
startAngle,
|
|
endAngle: startAngle + circumference,
|
|
circumference,
|
|
outerRadius,
|
|
innerRadius
|
|
};
|
|
if (includeOptions) {
|
|
properties.options = sharedOptions || this.resolveDataElementOptions(i, arc.active ? 'active' : mode);
|
|
}
|
|
startAngle += circumference;
|
|
this.updateElement(arc, i, properties, mode);
|
|
}
|
|
}
|
|
calculateTotal() {
|
|
const meta = this._cachedMeta;
|
|
const metaData = meta.data;
|
|
let total = 0;
|
|
let i;
|
|
for (i = 0; i < metaData.length; i++) {
|
|
const value = meta._parsed[i];
|
|
if (value !== null && !isNaN(value) && this.chart.getDataVisibility(i) && !metaData[i].hidden) {
|
|
total += Math.abs(value);
|
|
}
|
|
}
|
|
return total;
|
|
}
|
|
calculateCircumference(value) {
|
|
const total = this._cachedMeta.total;
|
|
if (total > 0 && !isNaN(value)) {
|
|
return TAU * (Math.abs(value) / total);
|
|
}
|
|
return 0;
|
|
}
|
|
getLabelAndValue(index) {
|
|
const meta = this._cachedMeta;
|
|
const chart = this.chart;
|
|
const labels = chart.data.labels || [];
|
|
const value = formatNumber(meta._parsed[index], chart.options.locale);
|
|
return {
|
|
label: labels[index] || '',
|
|
value,
|
|
};
|
|
}
|
|
getMaxBorderWidth(arcs) {
|
|
let max = 0;
|
|
const chart = this.chart;
|
|
let i, ilen, meta, controller, options;
|
|
if (!arcs) {
|
|
for (i = 0, ilen = chart.data.datasets.length; i < ilen; ++i) {
|
|
if (chart.isDatasetVisible(i)) {
|
|
meta = chart.getDatasetMeta(i);
|
|
arcs = meta.data;
|
|
controller = meta.controller;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!arcs) {
|
|
return 0;
|
|
}
|
|
for (i = 0, ilen = arcs.length; i < ilen; ++i) {
|
|
options = controller.resolveDataElementOptions(i);
|
|
if (options.borderAlign !== 'inner') {
|
|
max = Math.max(max, options.borderWidth || 0, options.hoverBorderWidth || 0);
|
|
}
|
|
}
|
|
return max;
|
|
}
|
|
getMaxOffset(arcs) {
|
|
let max = 0;
|
|
for (let i = 0, ilen = arcs.length; i < ilen; ++i) {
|
|
const options = this.resolveDataElementOptions(i);
|
|
max = Math.max(max, options.offset || 0, options.hoverOffset || 0);
|
|
}
|
|
return max;
|
|
}
|
|
_getRingWeightOffset(datasetIndex) {
|
|
let ringWeightOffset = 0;
|
|
for (let i = 0; i < datasetIndex; ++i) {
|
|
if (this.chart.isDatasetVisible(i)) {
|
|
ringWeightOffset += this._getRingWeight(i);
|
|
}
|
|
}
|
|
return ringWeightOffset;
|
|
}
|
|
_getRingWeight(datasetIndex) {
|
|
return Math.max(valueOrDefault(this.chart.data.datasets[datasetIndex].weight, 1), 0);
|
|
}
|
|
_getVisibleDatasetWeightTotal() {
|
|
return this._getRingWeightOffset(this.chart.data.datasets.length) || 1;
|
|
}
|
|
}
|
|
DoughnutController.id = 'doughnut';
|
|
DoughnutController.defaults = {
|
|
datasetElementType: false,
|
|
dataElementType: 'arc',
|
|
animation: {
|
|
animateRotate: true,
|
|
animateScale: false
|
|
},
|
|
animations: {
|
|
numbers: {
|
|
type: 'number',
|
|
properties: ['circumference', 'endAngle', 'innerRadius', 'outerRadius', 'startAngle', 'x', 'y', 'offset', 'borderWidth', 'spacing']
|
|
},
|
|
},
|
|
cutout: '50%',
|
|
rotation: 0,
|
|
circumference: 360,
|
|
radius: '100%',
|
|
spacing: 0,
|
|
indexAxis: 'r',
|
|
};
|
|
DoughnutController.descriptors = {
|
|
_scriptable: (name) => name !== 'spacing',
|
|
_indexable: (name) => name !== 'spacing',
|
|
};
|
|
DoughnutController.overrides = {
|
|
aspectRatio: 1,
|
|
plugins: {
|
|
legend: {
|
|
labels: {
|
|
generateLabels(chart) {
|
|
const data = chart.data;
|
|
if (data.labels.length && data.datasets.length) {
|
|
const {labels: {pointStyle}} = chart.legend.options;
|
|
return data.labels.map((label, i) => {
|
|
const meta = chart.getDatasetMeta(0);
|
|
const style = meta.controller.getStyle(i);
|
|
return {
|
|
text: label,
|
|
fillStyle: style.backgroundColor,
|
|
strokeStyle: style.borderColor,
|
|
lineWidth: style.borderWidth,
|
|
pointStyle: pointStyle,
|
|
hidden: !chart.getDataVisibility(i),
|
|
index: i
|
|
};
|
|
});
|
|
}
|
|
return [];
|
|
}
|
|
},
|
|
onClick(e, legendItem, legend) {
|
|
legend.chart.toggleDataVisibility(legendItem.index);
|
|
legend.chart.update();
|
|
}
|
|
},
|
|
tooltip: {
|
|
callbacks: {
|
|
title() {
|
|
return '';
|
|
},
|
|
label(tooltipItem) {
|
|
let dataLabel = tooltipItem.label;
|
|
const value = ': ' + tooltipItem.formattedValue;
|
|
if (isArray(dataLabel)) {
|
|
dataLabel = dataLabel.slice();
|
|
dataLabel[0] += value;
|
|
} else {
|
|
dataLabel += value;
|
|
}
|
|
return dataLabel;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
class LineController extends DatasetController {
|
|
initialize() {
|
|
this.enableOptionSharing = true;
|
|
this.supportsDecimation = true;
|
|
super.initialize();
|
|
}
|
|
update(mode) {
|
|
const meta = this._cachedMeta;
|
|
const {dataset: line, data: points = [], _dataset} = meta;
|
|
const animationsDisabled = this.chart._animationsDisabled;
|
|
let {start, count} = _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled);
|
|
this._drawStart = start;
|
|
this._drawCount = count;
|
|
if (_scaleRangesChanged(meta)) {
|
|
start = 0;
|
|
count = points.length;
|
|
}
|
|
line._chart = this.chart;
|
|
line._datasetIndex = this.index;
|
|
line._decimated = !!_dataset._decimated;
|
|
line.points = points;
|
|
const options = this.resolveDatasetElementOptions(mode);
|
|
if (!this.options.showLine) {
|
|
options.borderWidth = 0;
|
|
}
|
|
options.segment = this.options.segment;
|
|
this.updateElement(line, undefined, {
|
|
animated: !animationsDisabled,
|
|
options
|
|
}, mode);
|
|
this.updateElements(points, start, count, mode);
|
|
}
|
|
updateElements(points, start, count, mode) {
|
|
const reset = mode === 'reset';
|
|
const {iScale, vScale, _stacked, _dataset} = this._cachedMeta;
|
|
const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);
|
|
const iAxis = iScale.axis;
|
|
const vAxis = vScale.axis;
|
|
const {spanGaps, segment} = this.options;
|
|
const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;
|
|
const directUpdate = this.chart._animationsDisabled || reset || mode === 'none';
|
|
let prevParsed = start > 0 && this.getParsed(start - 1);
|
|
for (let i = start; i < start + count; ++i) {
|
|
const point = points[i];
|
|
const parsed = this.getParsed(i);
|
|
const properties = directUpdate ? point : {};
|
|
const nullData = isNullOrUndef(parsed[vAxis]);
|
|
const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);
|
|
const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? this.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);
|
|
properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;
|
|
properties.stop = i > 0 && (Math.abs(parsed[iAxis] - prevParsed[iAxis])) > maxGapLength;
|
|
if (segment) {
|
|
properties.parsed = parsed;
|
|
properties.raw = _dataset.data[i];
|
|
}
|
|
if (includeOptions) {
|
|
properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);
|
|
}
|
|
if (!directUpdate) {
|
|
this.updateElement(point, i, properties, mode);
|
|
}
|
|
prevParsed = parsed;
|
|
}
|
|
}
|
|
getMaxOverflow() {
|
|
const meta = this._cachedMeta;
|
|
const dataset = meta.dataset;
|
|
const border = dataset.options && dataset.options.borderWidth || 0;
|
|
const data = meta.data || [];
|
|
if (!data.length) {
|
|
return border;
|
|
}
|
|
const firstPoint = data[0].size(this.resolveDataElementOptions(0));
|
|
const lastPoint = data[data.length - 1].size(this.resolveDataElementOptions(data.length - 1));
|
|
return Math.max(border, firstPoint, lastPoint) / 2;
|
|
}
|
|
draw() {
|
|
const meta = this._cachedMeta;
|
|
meta.dataset.updateControlPoints(this.chart.chartArea, meta.iScale.axis);
|
|
super.draw();
|
|
}
|
|
}
|
|
LineController.id = 'line';
|
|
LineController.defaults = {
|
|
datasetElementType: 'line',
|
|
dataElementType: 'point',
|
|
showLine: true,
|
|
spanGaps: false,
|
|
};
|
|
LineController.overrides = {
|
|
scales: {
|
|
_index_: {
|
|
type: 'category',
|
|
},
|
|
_value_: {
|
|
type: 'linear',
|
|
},
|
|
}
|
|
};
|
|
|
|
class PolarAreaController extends DatasetController {
|
|
constructor(chart, datasetIndex) {
|
|
super(chart, datasetIndex);
|
|
this.innerRadius = undefined;
|
|
this.outerRadius = undefined;
|
|
}
|
|
getLabelAndValue(index) {
|
|
const meta = this._cachedMeta;
|
|
const chart = this.chart;
|
|
const labels = chart.data.labels || [];
|
|
const value = formatNumber(meta._parsed[index].r, chart.options.locale);
|
|
return {
|
|
label: labels[index] || '',
|
|
value,
|
|
};
|
|
}
|
|
parseObjectData(meta, data, start, count) {
|
|
return _parseObjectDataRadialScale.bind(this)(meta, data, start, count);
|
|
}
|
|
update(mode) {
|
|
const arcs = this._cachedMeta.data;
|
|
this._updateRadius();
|
|
this.updateElements(arcs, 0, arcs.length, mode);
|
|
}
|
|
getMinMax() {
|
|
const meta = this._cachedMeta;
|
|
const range = {min: Number.POSITIVE_INFINITY, max: Number.NEGATIVE_INFINITY};
|
|
meta.data.forEach((element, index) => {
|
|
const parsed = this.getParsed(index).r;
|
|
if (!isNaN(parsed) && this.chart.getDataVisibility(index)) {
|
|
if (parsed < range.min) {
|
|
range.min = parsed;
|
|
}
|
|
if (parsed > range.max) {
|
|
range.max = parsed;
|
|
}
|
|
}
|
|
});
|
|
return range;
|
|
}
|
|
_updateRadius() {
|
|
const chart = this.chart;
|
|
const chartArea = chart.chartArea;
|
|
const opts = chart.options;
|
|
const minSize = Math.min(chartArea.right - chartArea.left, chartArea.bottom - chartArea.top);
|
|
const outerRadius = Math.max(minSize / 2, 0);
|
|
const innerRadius = Math.max(opts.cutoutPercentage ? (outerRadius / 100) * (opts.cutoutPercentage) : 1, 0);
|
|
const radiusLength = (outerRadius - innerRadius) / chart.getVisibleDatasetCount();
|
|
this.outerRadius = outerRadius - (radiusLength * this.index);
|
|
this.innerRadius = this.outerRadius - radiusLength;
|
|
}
|
|
updateElements(arcs, start, count, mode) {
|
|
const reset = mode === 'reset';
|
|
const chart = this.chart;
|
|
const opts = chart.options;
|
|
const animationOpts = opts.animation;
|
|
const scale = this._cachedMeta.rScale;
|
|
const centerX = scale.xCenter;
|
|
const centerY = scale.yCenter;
|
|
const datasetStartAngle = scale.getIndexAngle(0) - 0.5 * PI;
|
|
let angle = datasetStartAngle;
|
|
let i;
|
|
const defaultAngle = 360 / this.countVisibleElements();
|
|
for (i = 0; i < start; ++i) {
|
|
angle += this._computeAngle(i, mode, defaultAngle);
|
|
}
|
|
for (i = start; i < start + count; i++) {
|
|
const arc = arcs[i];
|
|
let startAngle = angle;
|
|
let endAngle = angle + this._computeAngle(i, mode, defaultAngle);
|
|
let outerRadius = chart.getDataVisibility(i) ? scale.getDistanceFromCenterForValue(this.getParsed(i).r) : 0;
|
|
angle = endAngle;
|
|
if (reset) {
|
|
if (animationOpts.animateScale) {
|
|
outerRadius = 0;
|
|
}
|
|
if (animationOpts.animateRotate) {
|
|
startAngle = endAngle = datasetStartAngle;
|
|
}
|
|
}
|
|
const properties = {
|
|
x: centerX,
|
|
y: centerY,
|
|
innerRadius: 0,
|
|
outerRadius,
|
|
startAngle,
|
|
endAngle,
|
|
options: this.resolveDataElementOptions(i, arc.active ? 'active' : mode)
|
|
};
|
|
this.updateElement(arc, i, properties, mode);
|
|
}
|
|
}
|
|
countVisibleElements() {
|
|
const meta = this._cachedMeta;
|
|
let count = 0;
|
|
meta.data.forEach((element, index) => {
|
|
if (!isNaN(this.getParsed(index).r) && this.chart.getDataVisibility(index)) {
|
|
count++;
|
|
}
|
|
});
|
|
return count;
|
|
}
|
|
_computeAngle(index, mode, defaultAngle) {
|
|
return this.chart.getDataVisibility(index)
|
|
? toRadians(this.resolveDataElementOptions(index, mode).angle || defaultAngle)
|
|
: 0;
|
|
}
|
|
}
|
|
PolarAreaController.id = 'polarArea';
|
|
PolarAreaController.defaults = {
|
|
dataElementType: 'arc',
|
|
animation: {
|
|
animateRotate: true,
|
|
animateScale: true
|
|
},
|
|
animations: {
|
|
numbers: {
|
|
type: 'number',
|
|
properties: ['x', 'y', 'startAngle', 'endAngle', 'innerRadius', 'outerRadius']
|
|
},
|
|
},
|
|
indexAxis: 'r',
|
|
startAngle: 0,
|
|
};
|
|
PolarAreaController.overrides = {
|
|
aspectRatio: 1,
|
|
plugins: {
|
|
legend: {
|
|
labels: {
|
|
generateLabels(chart) {
|
|
const data = chart.data;
|
|
if (data.labels.length && data.datasets.length) {
|
|
const {labels: {pointStyle}} = chart.legend.options;
|
|
return data.labels.map((label, i) => {
|
|
const meta = chart.getDatasetMeta(0);
|
|
const style = meta.controller.getStyle(i);
|
|
return {
|
|
text: label,
|
|
fillStyle: style.backgroundColor,
|
|
strokeStyle: style.borderColor,
|
|
lineWidth: style.borderWidth,
|
|
pointStyle: pointStyle,
|
|
hidden: !chart.getDataVisibility(i),
|
|
index: i
|
|
};
|
|
});
|
|
}
|
|
return [];
|
|
}
|
|
},
|
|
onClick(e, legendItem, legend) {
|
|
legend.chart.toggleDataVisibility(legendItem.index);
|
|
legend.chart.update();
|
|
}
|
|
},
|
|
tooltip: {
|
|
callbacks: {
|
|
title() {
|
|
return '';
|
|
},
|
|
label(context) {
|
|
return context.chart.data.labels[context.dataIndex] + ': ' + context.formattedValue;
|
|
}
|
|
}
|
|
}
|
|
},
|
|
scales: {
|
|
r: {
|
|
type: 'radialLinear',
|
|
angleLines: {
|
|
display: false
|
|
},
|
|
beginAtZero: true,
|
|
grid: {
|
|
circular: true
|
|
},
|
|
pointLabels: {
|
|
display: false
|
|
},
|
|
startAngle: 0
|
|
}
|
|
}
|
|
};
|
|
|
|
class PieController extends DoughnutController {
|
|
}
|
|
PieController.id = 'pie';
|
|
PieController.defaults = {
|
|
cutout: 0,
|
|
rotation: 0,
|
|
circumference: 360,
|
|
radius: '100%'
|
|
};
|
|
|
|
class RadarController extends DatasetController {
|
|
getLabelAndValue(index) {
|
|
const vScale = this._cachedMeta.vScale;
|
|
const parsed = this.getParsed(index);
|
|
return {
|
|
label: vScale.getLabels()[index],
|
|
value: '' + vScale.getLabelForValue(parsed[vScale.axis])
|
|
};
|
|
}
|
|
parseObjectData(meta, data, start, count) {
|
|
return _parseObjectDataRadialScale.bind(this)(meta, data, start, count);
|
|
}
|
|
update(mode) {
|
|
const meta = this._cachedMeta;
|
|
const line = meta.dataset;
|
|
const points = meta.data || [];
|
|
const labels = meta.iScale.getLabels();
|
|
line.points = points;
|
|
if (mode !== 'resize') {
|
|
const options = this.resolveDatasetElementOptions(mode);
|
|
if (!this.options.showLine) {
|
|
options.borderWidth = 0;
|
|
}
|
|
const properties = {
|
|
_loop: true,
|
|
_fullLoop: labels.length === points.length,
|
|
options
|
|
};
|
|
this.updateElement(line, undefined, properties, mode);
|
|
}
|
|
this.updateElements(points, 0, points.length, mode);
|
|
}
|
|
updateElements(points, start, count, mode) {
|
|
const scale = this._cachedMeta.rScale;
|
|
const reset = mode === 'reset';
|
|
for (let i = start; i < start + count; i++) {
|
|
const point = points[i];
|
|
const options = this.resolveDataElementOptions(i, point.active ? 'active' : mode);
|
|
const pointPosition = scale.getPointPositionForValue(i, this.getParsed(i).r);
|
|
const x = reset ? scale.xCenter : pointPosition.x;
|
|
const y = reset ? scale.yCenter : pointPosition.y;
|
|
const properties = {
|
|
x,
|
|
y,
|
|
angle: pointPosition.angle,
|
|
skip: isNaN(x) || isNaN(y),
|
|
options
|
|
};
|
|
this.updateElement(point, i, properties, mode);
|
|
}
|
|
}
|
|
}
|
|
RadarController.id = 'radar';
|
|
RadarController.defaults = {
|
|
datasetElementType: 'line',
|
|
dataElementType: 'point',
|
|
indexAxis: 'r',
|
|
showLine: true,
|
|
elements: {
|
|
line: {
|
|
fill: 'start'
|
|
}
|
|
},
|
|
};
|
|
RadarController.overrides = {
|
|
aspectRatio: 1,
|
|
scales: {
|
|
r: {
|
|
type: 'radialLinear',
|
|
}
|
|
}
|
|
};
|
|
|
|
class Element {
|
|
constructor() {
|
|
this.x = undefined;
|
|
this.y = undefined;
|
|
this.active = false;
|
|
this.options = undefined;
|
|
this.$animations = undefined;
|
|
}
|
|
tooltipPosition(useFinalPosition) {
|
|
const {x, y} = this.getProps(['x', 'y'], useFinalPosition);
|
|
return {x, y};
|
|
}
|
|
hasValue() {
|
|
return isNumber(this.x) && isNumber(this.y);
|
|
}
|
|
getProps(props, final) {
|
|
const anims = this.$animations;
|
|
if (!final || !anims) {
|
|
return this;
|
|
}
|
|
const ret = {};
|
|
props.forEach(prop => {
|
|
ret[prop] = anims[prop] && anims[prop].active() ? anims[prop]._to : this[prop];
|
|
});
|
|
return ret;
|
|
}
|
|
}
|
|
Element.defaults = {};
|
|
Element.defaultRoutes = undefined;
|
|
|
|
const formatters = {
|
|
values(value) {
|
|
return isArray(value) ? value : '' + value;
|
|
},
|
|
numeric(tickValue, index, ticks) {
|
|
if (tickValue === 0) {
|
|
return '0';
|
|
}
|
|
const locale = this.chart.options.locale;
|
|
let notation;
|
|
let delta = tickValue;
|
|
if (ticks.length > 1) {
|
|
const maxTick = Math.max(Math.abs(ticks[0].value), Math.abs(ticks[ticks.length - 1].value));
|
|
if (maxTick < 1e-4 || maxTick > 1e+15) {
|
|
notation = 'scientific';
|
|
}
|
|
delta = calculateDelta(tickValue, ticks);
|
|
}
|
|
const logDelta = log10(Math.abs(delta));
|
|
const numDecimal = Math.max(Math.min(-1 * Math.floor(logDelta), 20), 0);
|
|
const options = {notation, minimumFractionDigits: numDecimal, maximumFractionDigits: numDecimal};
|
|
Object.assign(options, this.options.ticks.format);
|
|
return formatNumber(tickValue, locale, options);
|
|
},
|
|
logarithmic(tickValue, index, ticks) {
|
|
if (tickValue === 0) {
|
|
return '0';
|
|
}
|
|
const remain = tickValue / (Math.pow(10, Math.floor(log10(tickValue))));
|
|
if (remain === 1 || remain === 2 || remain === 5) {
|
|
return formatters.numeric.call(this, tickValue, index, ticks);
|
|
}
|
|
return '';
|
|
}
|
|
};
|
|
function calculateDelta(tickValue, ticks) {
|
|
let delta = ticks.length > 3 ? ticks[2].value - ticks[1].value : ticks[1].value - ticks[0].value;
|
|
if (Math.abs(delta) >= 1 && tickValue !== Math.floor(tickValue)) {
|
|
delta = tickValue - Math.floor(tickValue);
|
|
}
|
|
return delta;
|
|
}
|
|
var Ticks = {formatters};
|
|
|
|
defaults.set('scale', {
|
|
display: true,
|
|
offset: false,
|
|
reverse: false,
|
|
beginAtZero: false,
|
|
bounds: 'ticks',
|
|
grace: 0,
|
|
grid: {
|
|
display: true,
|
|
lineWidth: 1,
|
|
drawBorder: true,
|
|
drawOnChartArea: true,
|
|
drawTicks: true,
|
|
tickLength: 8,
|
|
tickWidth: (_ctx, options) => options.lineWidth,
|
|
tickColor: (_ctx, options) => options.color,
|
|
offset: false,
|
|
borderDash: [],
|
|
borderDashOffset: 0.0,
|
|
borderWidth: 1
|
|
},
|
|
title: {
|
|
display: false,
|
|
text: '',
|
|
padding: {
|
|
top: 4,
|
|
bottom: 4
|
|
}
|
|
},
|
|
ticks: {
|
|
minRotation: 0,
|
|
maxRotation: 50,
|
|
mirror: false,
|
|
textStrokeWidth: 0,
|
|
textStrokeColor: '',
|
|
padding: 3,
|
|
display: true,
|
|
autoSkip: true,
|
|
autoSkipPadding: 3,
|
|
labelOffset: 0,
|
|
callback: Ticks.formatters.values,
|
|
minor: {},
|
|
major: {},
|
|
align: 'center',
|
|
crossAlign: 'near',
|
|
showLabelBackdrop: false,
|
|
backdropColor: 'rgba(255, 255, 255, 0.75)',
|
|
backdropPadding: 2,
|
|
}
|
|
});
|
|
defaults.route('scale.ticks', 'color', '', 'color');
|
|
defaults.route('scale.grid', 'color', '', 'borderColor');
|
|
defaults.route('scale.grid', 'borderColor', '', 'borderColor');
|
|
defaults.route('scale.title', 'color', '', 'color');
|
|
defaults.describe('scale', {
|
|
_fallback: false,
|
|
_scriptable: (name) => !name.startsWith('before') && !name.startsWith('after') && name !== 'callback' && name !== 'parser',
|
|
_indexable: (name) => name !== 'borderDash' && name !== 'tickBorderDash',
|
|
});
|
|
defaults.describe('scales', {
|
|
_fallback: 'scale',
|
|
});
|
|
defaults.describe('scale.ticks', {
|
|
_scriptable: (name) => name !== 'backdropPadding' && name !== 'callback',
|
|
_indexable: (name) => name !== 'backdropPadding',
|
|
});
|
|
|
|
function autoSkip(scale, ticks) {
|
|
const tickOpts = scale.options.ticks;
|
|
const ticksLimit = tickOpts.maxTicksLimit || determineMaxTicks(scale);
|
|
const majorIndices = tickOpts.major.enabled ? getMajorIndices(ticks) : [];
|
|
const numMajorIndices = majorIndices.length;
|
|
const first = majorIndices[0];
|
|
const last = majorIndices[numMajorIndices - 1];
|
|
const newTicks = [];
|
|
if (numMajorIndices > ticksLimit) {
|
|
skipMajors(ticks, newTicks, majorIndices, numMajorIndices / ticksLimit);
|
|
return newTicks;
|
|
}
|
|
const spacing = calculateSpacing(majorIndices, ticks, ticksLimit);
|
|
if (numMajorIndices > 0) {
|
|
let i, ilen;
|
|
const avgMajorSpacing = numMajorIndices > 1 ? Math.round((last - first) / (numMajorIndices - 1)) : null;
|
|
skip(ticks, newTicks, spacing, isNullOrUndef(avgMajorSpacing) ? 0 : first - avgMajorSpacing, first);
|
|
for (i = 0, ilen = numMajorIndices - 1; i < ilen; i++) {
|
|
skip(ticks, newTicks, spacing, majorIndices[i], majorIndices[i + 1]);
|
|
}
|
|
skip(ticks, newTicks, spacing, last, isNullOrUndef(avgMajorSpacing) ? ticks.length : last + avgMajorSpacing);
|
|
return newTicks;
|
|
}
|
|
skip(ticks, newTicks, spacing);
|
|
return newTicks;
|
|
}
|
|
function determineMaxTicks(scale) {
|
|
const offset = scale.options.offset;
|
|
const tickLength = scale._tickSize();
|
|
const maxScale = scale._length / tickLength + (offset ? 0 : 1);
|
|
const maxChart = scale._maxLength / tickLength;
|
|
return Math.floor(Math.min(maxScale, maxChart));
|
|
}
|
|
function calculateSpacing(majorIndices, ticks, ticksLimit) {
|
|
const evenMajorSpacing = getEvenSpacing(majorIndices);
|
|
const spacing = ticks.length / ticksLimit;
|
|
if (!evenMajorSpacing) {
|
|
return Math.max(spacing, 1);
|
|
}
|
|
const factors = _factorize(evenMajorSpacing);
|
|
for (let i = 0, ilen = factors.length - 1; i < ilen; i++) {
|
|
const factor = factors[i];
|
|
if (factor > spacing) {
|
|
return factor;
|
|
}
|
|
}
|
|
return Math.max(spacing, 1);
|
|
}
|
|
function getMajorIndices(ticks) {
|
|
const result = [];
|
|
let i, ilen;
|
|
for (i = 0, ilen = ticks.length; i < ilen; i++) {
|
|
if (ticks[i].major) {
|
|
result.push(i);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
function skipMajors(ticks, newTicks, majorIndices, spacing) {
|
|
let count = 0;
|
|
let next = majorIndices[0];
|
|
let i;
|
|
spacing = Math.ceil(spacing);
|
|
for (i = 0; i < ticks.length; i++) {
|
|
if (i === next) {
|
|
newTicks.push(ticks[i]);
|
|
count++;
|
|
next = majorIndices[count * spacing];
|
|
}
|
|
}
|
|
}
|
|
function skip(ticks, newTicks, spacing, majorStart, majorEnd) {
|
|
const start = valueOrDefault(majorStart, 0);
|
|
const end = Math.min(valueOrDefault(majorEnd, ticks.length), ticks.length);
|
|
let count = 0;
|
|
let length, i, next;
|
|
spacing = Math.ceil(spacing);
|
|
if (majorEnd) {
|
|
length = majorEnd - majorStart;
|
|
spacing = length / Math.floor(length / spacing);
|
|
}
|
|
next = start;
|
|
while (next < 0) {
|
|
count++;
|
|
next = Math.round(start + count * spacing);
|
|
}
|
|
for (i = Math.max(start, 0); i < end; i++) {
|
|
if (i === next) {
|
|
newTicks.push(ticks[i]);
|
|
count++;
|
|
next = Math.round(start + count * spacing);
|
|
}
|
|
}
|
|
}
|
|
function getEvenSpacing(arr) {
|
|
const len = arr.length;
|
|
let i, diff;
|
|
if (len < 2) {
|
|
return false;
|
|
}
|
|
for (diff = arr[0], i = 1; i < len; ++i) {
|
|
if (arr[i] - arr[i - 1] !== diff) {
|
|
return false;
|
|
}
|
|
}
|
|
return diff;
|
|
}
|
|
|
|
const reverseAlign = (align) => align === 'left' ? 'right' : align === 'right' ? 'left' : align;
|
|
const offsetFromEdge = (scale, edge, offset) => edge === 'top' || edge === 'left' ? scale[edge] + offset : scale[edge] - offset;
|
|
function sample(arr, numItems) {
|
|
const result = [];
|
|
const increment = arr.length / numItems;
|
|
const len = arr.length;
|
|
let i = 0;
|
|
for (; i < len; i += increment) {
|
|
result.push(arr[Math.floor(i)]);
|
|
}
|
|
return result;
|
|
}
|
|
function getPixelForGridLine(scale, index, offsetGridLines) {
|
|
const length = scale.ticks.length;
|
|
const validIndex = Math.min(index, length - 1);
|
|
const start = scale._startPixel;
|
|
const end = scale._endPixel;
|
|
const epsilon = 1e-6;
|
|
let lineValue = scale.getPixelForTick(validIndex);
|
|
let offset;
|
|
if (offsetGridLines) {
|
|
if (length === 1) {
|
|
offset = Math.max(lineValue - start, end - lineValue);
|
|
} else if (index === 0) {
|
|
offset = (scale.getPixelForTick(1) - lineValue) / 2;
|
|
} else {
|
|
offset = (lineValue - scale.getPixelForTick(validIndex - 1)) / 2;
|
|
}
|
|
lineValue += validIndex < index ? offset : -offset;
|
|
if (lineValue < start - epsilon || lineValue > end + epsilon) {
|
|
return;
|
|
}
|
|
}
|
|
return lineValue;
|
|
}
|
|
function garbageCollect(caches, length) {
|
|
each(caches, (cache) => {
|
|
const gc = cache.gc;
|
|
const gcLen = gc.length / 2;
|
|
let i;
|
|
if (gcLen > length) {
|
|
for (i = 0; i < gcLen; ++i) {
|
|
delete cache.data[gc[i]];
|
|
}
|
|
gc.splice(0, gcLen);
|
|
}
|
|
});
|
|
}
|
|
function getTickMarkLength(options) {
|
|
return options.drawTicks ? options.tickLength : 0;
|
|
}
|
|
function getTitleHeight(options, fallback) {
|
|
if (!options.display) {
|
|
return 0;
|
|
}
|
|
const font = toFont(options.font, fallback);
|
|
const padding = toPadding(options.padding);
|
|
const lines = isArray(options.text) ? options.text.length : 1;
|
|
return (lines * font.lineHeight) + padding.height;
|
|
}
|
|
function createScaleContext(parent, scale) {
|
|
return createContext(parent, {
|
|
scale,
|
|
type: 'scale'
|
|
});
|
|
}
|
|
function createTickContext(parent, index, tick) {
|
|
return createContext(parent, {
|
|
tick,
|
|
index,
|
|
type: 'tick'
|
|
});
|
|
}
|
|
function titleAlign(align, position, reverse) {
|
|
let ret = _toLeftRightCenter(align);
|
|
if ((reverse && position !== 'right') || (!reverse && position === 'right')) {
|
|
ret = reverseAlign(ret);
|
|
}
|
|
return ret;
|
|
}
|
|
function titleArgs(scale, offset, position, align) {
|
|
const {top, left, bottom, right, chart} = scale;
|
|
const {chartArea, scales} = chart;
|
|
let rotation = 0;
|
|
let maxWidth, titleX, titleY;
|
|
const height = bottom - top;
|
|
const width = right - left;
|
|
if (scale.isHorizontal()) {
|
|
titleX = _alignStartEnd(align, left, right);
|
|
if (isObject(position)) {
|
|
const positionAxisID = Object.keys(position)[0];
|
|
const value = position[positionAxisID];
|
|
titleY = scales[positionAxisID].getPixelForValue(value) + height - offset;
|
|
} else if (position === 'center') {
|
|
titleY = (chartArea.bottom + chartArea.top) / 2 + height - offset;
|
|
} else {
|
|
titleY = offsetFromEdge(scale, position, offset);
|
|
}
|
|
maxWidth = right - left;
|
|
} else {
|
|
if (isObject(position)) {
|
|
const positionAxisID = Object.keys(position)[0];
|
|
const value = position[positionAxisID];
|
|
titleX = scales[positionAxisID].getPixelForValue(value) - width + offset;
|
|
} else if (position === 'center') {
|
|
titleX = (chartArea.left + chartArea.right) / 2 - width + offset;
|
|
} else {
|
|
titleX = offsetFromEdge(scale, position, offset);
|
|
}
|
|
titleY = _alignStartEnd(align, bottom, top);
|
|
rotation = position === 'left' ? -HALF_PI : HALF_PI;
|
|
}
|
|
return {titleX, titleY, maxWidth, rotation};
|
|
}
|
|
class Scale extends Element {
|
|
constructor(cfg) {
|
|
super();
|
|
this.id = cfg.id;
|
|
this.type = cfg.type;
|
|
this.options = undefined;
|
|
this.ctx = cfg.ctx;
|
|
this.chart = cfg.chart;
|
|
this.top = undefined;
|
|
this.bottom = undefined;
|
|
this.left = undefined;
|
|
this.right = undefined;
|
|
this.width = undefined;
|
|
this.height = undefined;
|
|
this._margins = {
|
|
left: 0,
|
|
right: 0,
|
|
top: 0,
|
|
bottom: 0
|
|
};
|
|
this.maxWidth = undefined;
|
|
this.maxHeight = undefined;
|
|
this.paddingTop = undefined;
|
|
this.paddingBottom = undefined;
|
|
this.paddingLeft = undefined;
|
|
this.paddingRight = undefined;
|
|
this.axis = undefined;
|
|
this.labelRotation = undefined;
|
|
this.min = undefined;
|
|
this.max = undefined;
|
|
this._range = undefined;
|
|
this.ticks = [];
|
|
this._gridLineItems = null;
|
|
this._labelItems = null;
|
|
this._labelSizes = null;
|
|
this._length = 0;
|
|
this._maxLength = 0;
|
|
this._longestTextCache = {};
|
|
this._startPixel = undefined;
|
|
this._endPixel = undefined;
|
|
this._reversePixels = false;
|
|
this._userMax = undefined;
|
|
this._userMin = undefined;
|
|
this._suggestedMax = undefined;
|
|
this._suggestedMin = undefined;
|
|
this._ticksLength = 0;
|
|
this._borderValue = 0;
|
|
this._cache = {};
|
|
this._dataLimitsCached = false;
|
|
this.$context = undefined;
|
|
}
|
|
init(options) {
|
|
this.options = options.setContext(this.getContext());
|
|
this.axis = options.axis;
|
|
this._userMin = this.parse(options.min);
|
|
this._userMax = this.parse(options.max);
|
|
this._suggestedMin = this.parse(options.suggestedMin);
|
|
this._suggestedMax = this.parse(options.suggestedMax);
|
|
}
|
|
parse(raw, index) {
|
|
return raw;
|
|
}
|
|
getUserBounds() {
|
|
let {_userMin, _userMax, _suggestedMin, _suggestedMax} = this;
|
|
_userMin = finiteOrDefault(_userMin, Number.POSITIVE_INFINITY);
|
|
_userMax = finiteOrDefault(_userMax, Number.NEGATIVE_INFINITY);
|
|
_suggestedMin = finiteOrDefault(_suggestedMin, Number.POSITIVE_INFINITY);
|
|
_suggestedMax = finiteOrDefault(_suggestedMax, Number.NEGATIVE_INFINITY);
|
|
return {
|
|
min: finiteOrDefault(_userMin, _suggestedMin),
|
|
max: finiteOrDefault(_userMax, _suggestedMax),
|
|
minDefined: isNumberFinite(_userMin),
|
|
maxDefined: isNumberFinite(_userMax)
|
|
};
|
|
}
|
|
getMinMax(canStack) {
|
|
let {min, max, minDefined, maxDefined} = this.getUserBounds();
|
|
let range;
|
|
if (minDefined && maxDefined) {
|
|
return {min, max};
|
|
}
|
|
const metas = this.getMatchingVisibleMetas();
|
|
for (let i = 0, ilen = metas.length; i < ilen; ++i) {
|
|
range = metas[i].controller.getMinMax(this, canStack);
|
|
if (!minDefined) {
|
|
min = Math.min(min, range.min);
|
|
}
|
|
if (!maxDefined) {
|
|
max = Math.max(max, range.max);
|
|
}
|
|
}
|
|
min = maxDefined && min > max ? max : min;
|
|
max = minDefined && min > max ? min : max;
|
|
return {
|
|
min: finiteOrDefault(min, finiteOrDefault(max, min)),
|
|
max: finiteOrDefault(max, finiteOrDefault(min, max))
|
|
};
|
|
}
|
|
getPadding() {
|
|
return {
|
|
left: this.paddingLeft || 0,
|
|
top: this.paddingTop || 0,
|
|
right: this.paddingRight || 0,
|
|
bottom: this.paddingBottom || 0
|
|
};
|
|
}
|
|
getTicks() {
|
|
return this.ticks;
|
|
}
|
|
getLabels() {
|
|
const data = this.chart.data;
|
|
return this.options.labels || (this.isHorizontal() ? data.xLabels : data.yLabels) || data.labels || [];
|
|
}
|
|
beforeLayout() {
|
|
this._cache = {};
|
|
this._dataLimitsCached = false;
|
|
}
|
|
beforeUpdate() {
|
|
callback(this.options.beforeUpdate, [this]);
|
|
}
|
|
update(maxWidth, maxHeight, margins) {
|
|
const {beginAtZero, grace, ticks: tickOpts} = this.options;
|
|
const sampleSize = tickOpts.sampleSize;
|
|
this.beforeUpdate();
|
|
this.maxWidth = maxWidth;
|
|
this.maxHeight = maxHeight;
|
|
this._margins = margins = Object.assign({
|
|
left: 0,
|
|
right: 0,
|
|
top: 0,
|
|
bottom: 0
|
|
}, margins);
|
|
this.ticks = null;
|
|
this._labelSizes = null;
|
|
this._gridLineItems = null;
|
|
this._labelItems = null;
|
|
this.beforeSetDimensions();
|
|
this.setDimensions();
|
|
this.afterSetDimensions();
|
|
this._maxLength = this.isHorizontal()
|
|
? this.width + margins.left + margins.right
|
|
: this.height + margins.top + margins.bottom;
|
|
if (!this._dataLimitsCached) {
|
|
this.beforeDataLimits();
|
|
this.determineDataLimits();
|
|
this.afterDataLimits();
|
|
this._range = _addGrace(this, grace, beginAtZero);
|
|
this._dataLimitsCached = true;
|
|
}
|
|
this.beforeBuildTicks();
|
|
this.ticks = this.buildTicks() || [];
|
|
this.afterBuildTicks();
|
|
const samplingEnabled = sampleSize < this.ticks.length;
|
|
this._convertTicksToLabels(samplingEnabled ? sample(this.ticks, sampleSize) : this.ticks);
|
|
this.configure();
|
|
this.beforeCalculateLabelRotation();
|
|
this.calculateLabelRotation();
|
|
this.afterCalculateLabelRotation();
|
|
if (tickOpts.display && (tickOpts.autoSkip || tickOpts.source === 'auto')) {
|
|
this.ticks = autoSkip(this, this.ticks);
|
|
this._labelSizes = null;
|
|
this.afterAutoSkip();
|
|
}
|
|
if (samplingEnabled) {
|
|
this._convertTicksToLabels(this.ticks);
|
|
}
|
|
this.beforeFit();
|
|
this.fit();
|
|
this.afterFit();
|
|
this.afterUpdate();
|
|
}
|
|
configure() {
|
|
let reversePixels = this.options.reverse;
|
|
let startPixel, endPixel;
|
|
if (this.isHorizontal()) {
|
|
startPixel = this.left;
|
|
endPixel = this.right;
|
|
} else {
|
|
startPixel = this.top;
|
|
endPixel = this.bottom;
|
|
reversePixels = !reversePixels;
|
|
}
|
|
this._startPixel = startPixel;
|
|
this._endPixel = endPixel;
|
|
this._reversePixels = reversePixels;
|
|
this._length = endPixel - startPixel;
|
|
this._alignToPixels = this.options.alignToPixels;
|
|
}
|
|
afterUpdate() {
|
|
callback(this.options.afterUpdate, [this]);
|
|
}
|
|
beforeSetDimensions() {
|
|
callback(this.options.beforeSetDimensions, [this]);
|
|
}
|
|
setDimensions() {
|
|
if (this.isHorizontal()) {
|
|
this.width = this.maxWidth;
|
|
this.left = 0;
|
|
this.right = this.width;
|
|
} else {
|
|
this.height = this.maxHeight;
|
|
this.top = 0;
|
|
this.bottom = this.height;
|
|
}
|
|
this.paddingLeft = 0;
|
|
this.paddingTop = 0;
|
|
this.paddingRight = 0;
|
|
this.paddingBottom = 0;
|
|
}
|
|
afterSetDimensions() {
|
|
callback(this.options.afterSetDimensions, [this]);
|
|
}
|
|
_callHooks(name) {
|
|
this.chart.notifyPlugins(name, this.getContext());
|
|
callback(this.options[name], [this]);
|
|
}
|
|
beforeDataLimits() {
|
|
this._callHooks('beforeDataLimits');
|
|
}
|
|
determineDataLimits() {}
|
|
afterDataLimits() {
|
|
this._callHooks('afterDataLimits');
|
|
}
|
|
beforeBuildTicks() {
|
|
this._callHooks('beforeBuildTicks');
|
|
}
|
|
buildTicks() {
|
|
return [];
|
|
}
|
|
afterBuildTicks() {
|
|
this._callHooks('afterBuildTicks');
|
|
}
|
|
beforeTickToLabelConversion() {
|
|
callback(this.options.beforeTickToLabelConversion, [this]);
|
|
}
|
|
generateTickLabels(ticks) {
|
|
const tickOpts = this.options.ticks;
|
|
let i, ilen, tick;
|
|
for (i = 0, ilen = ticks.length; i < ilen; i++) {
|
|
tick = ticks[i];
|
|
tick.label = callback(tickOpts.callback, [tick.value, i, ticks], this);
|
|
}
|
|
}
|
|
afterTickToLabelConversion() {
|
|
callback(this.options.afterTickToLabelConversion, [this]);
|
|
}
|
|
beforeCalculateLabelRotation() {
|
|
callback(this.options.beforeCalculateLabelRotation, [this]);
|
|
}
|
|
calculateLabelRotation() {
|
|
const options = this.options;
|
|
const tickOpts = options.ticks;
|
|
const numTicks = this.ticks.length;
|
|
const minRotation = tickOpts.minRotation || 0;
|
|
const maxRotation = tickOpts.maxRotation;
|
|
let labelRotation = minRotation;
|
|
let tickWidth, maxHeight, maxLabelDiagonal;
|
|
if (!this._isVisible() || !tickOpts.display || minRotation >= maxRotation || numTicks <= 1 || !this.isHorizontal()) {
|
|
this.labelRotation = minRotation;
|
|
return;
|
|
}
|
|
const labelSizes = this._getLabelSizes();
|
|
const maxLabelWidth = labelSizes.widest.width;
|
|
const maxLabelHeight = labelSizes.highest.height;
|
|
const maxWidth = _limitValue(this.chart.width - maxLabelWidth, 0, this.maxWidth);
|
|
tickWidth = options.offset ? this.maxWidth / numTicks : maxWidth / (numTicks - 1);
|
|
if (maxLabelWidth + 6 > tickWidth) {
|
|
tickWidth = maxWidth / (numTicks - (options.offset ? 0.5 : 1));
|
|
maxHeight = this.maxHeight - getTickMarkLength(options.grid)
|
|
- tickOpts.padding - getTitleHeight(options.title, this.chart.options.font);
|
|
maxLabelDiagonal = Math.sqrt(maxLabelWidth * maxLabelWidth + maxLabelHeight * maxLabelHeight);
|
|
labelRotation = toDegrees(Math.min(
|
|
Math.asin(_limitValue((labelSizes.highest.height + 6) / tickWidth, -1, 1)),
|
|
Math.asin(_limitValue(maxHeight / maxLabelDiagonal, -1, 1)) - Math.asin(_limitValue(maxLabelHeight / maxLabelDiagonal, -1, 1))
|
|
));
|
|
labelRotation = Math.max(minRotation, Math.min(maxRotation, labelRotation));
|
|
}
|
|
this.labelRotation = labelRotation;
|
|
}
|
|
afterCalculateLabelRotation() {
|
|
callback(this.options.afterCalculateLabelRotation, [this]);
|
|
}
|
|
afterAutoSkip() {}
|
|
beforeFit() {
|
|
callback(this.options.beforeFit, [this]);
|
|
}
|
|
fit() {
|
|
const minSize = {
|
|
width: 0,
|
|
height: 0
|
|
};
|
|
const {chart, options: {ticks: tickOpts, title: titleOpts, grid: gridOpts}} = this;
|
|
const display = this._isVisible();
|
|
const isHorizontal = this.isHorizontal();
|
|
if (display) {
|
|
const titleHeight = getTitleHeight(titleOpts, chart.options.font);
|
|
if (isHorizontal) {
|
|
minSize.width = this.maxWidth;
|
|
minSize.height = getTickMarkLength(gridOpts) + titleHeight;
|
|
} else {
|
|
minSize.height = this.maxHeight;
|
|
minSize.width = getTickMarkLength(gridOpts) + titleHeight;
|
|
}
|
|
if (tickOpts.display && this.ticks.length) {
|
|
const {first, last, widest, highest} = this._getLabelSizes();
|
|
const tickPadding = tickOpts.padding * 2;
|
|
const angleRadians = toRadians(this.labelRotation);
|
|
const cos = Math.cos(angleRadians);
|
|
const sin = Math.sin(angleRadians);
|
|
if (isHorizontal) {
|
|
const labelHeight = tickOpts.mirror ? 0 : sin * widest.width + cos * highest.height;
|
|
minSize.height = Math.min(this.maxHeight, minSize.height + labelHeight + tickPadding);
|
|
} else {
|
|
const labelWidth = tickOpts.mirror ? 0 : cos * widest.width + sin * highest.height;
|
|
minSize.width = Math.min(this.maxWidth, minSize.width + labelWidth + tickPadding);
|
|
}
|
|
this._calculatePadding(first, last, sin, cos);
|
|
}
|
|
}
|
|
this._handleMargins();
|
|
if (isHorizontal) {
|
|
this.width = this._length = chart.width - this._margins.left - this._margins.right;
|
|
this.height = minSize.height;
|
|
} else {
|
|
this.width = minSize.width;
|
|
this.height = this._length = chart.height - this._margins.top - this._margins.bottom;
|
|
}
|
|
}
|
|
_calculatePadding(first, last, sin, cos) {
|
|
const {ticks: {align, padding}, position} = this.options;
|
|
const isRotated = this.labelRotation !== 0;
|
|
const labelsBelowTicks = position !== 'top' && this.axis === 'x';
|
|
if (this.isHorizontal()) {
|
|
const offsetLeft = this.getPixelForTick(0) - this.left;
|
|
const offsetRight = this.right - this.getPixelForTick(this.ticks.length - 1);
|
|
let paddingLeft = 0;
|
|
let paddingRight = 0;
|
|
if (isRotated) {
|
|
if (labelsBelowTicks) {
|
|
paddingLeft = cos * first.width;
|
|
paddingRight = sin * last.height;
|
|
} else {
|
|
paddingLeft = sin * first.height;
|
|
paddingRight = cos * last.width;
|
|
}
|
|
} else if (align === 'start') {
|
|
paddingRight = last.width;
|
|
} else if (align === 'end') {
|
|
paddingLeft = first.width;
|
|
} else if (align !== 'inner') {
|
|
paddingLeft = first.width / 2;
|
|
paddingRight = last.width / 2;
|
|
}
|
|
this.paddingLeft = Math.max((paddingLeft - offsetLeft + padding) * this.width / (this.width - offsetLeft), 0);
|
|
this.paddingRight = Math.max((paddingRight - offsetRight + padding) * this.width / (this.width - offsetRight), 0);
|
|
} else {
|
|
let paddingTop = last.height / 2;
|
|
let paddingBottom = first.height / 2;
|
|
if (align === 'start') {
|
|
paddingTop = 0;
|
|
paddingBottom = first.height;
|
|
} else if (align === 'end') {
|
|
paddingTop = last.height;
|
|
paddingBottom = 0;
|
|
}
|
|
this.paddingTop = paddingTop + padding;
|
|
this.paddingBottom = paddingBottom + padding;
|
|
}
|
|
}
|
|
_handleMargins() {
|
|
if (this._margins) {
|
|
this._margins.left = Math.max(this.paddingLeft, this._margins.left);
|
|
this._margins.top = Math.max(this.paddingTop, this._margins.top);
|
|
this._margins.right = Math.max(this.paddingRight, this._margins.right);
|
|
this._margins.bottom = Math.max(this.paddingBottom, this._margins.bottom);
|
|
}
|
|
}
|
|
afterFit() {
|
|
callback(this.options.afterFit, [this]);
|
|
}
|
|
isHorizontal() {
|
|
const {axis, position} = this.options;
|
|
return position === 'top' || position === 'bottom' || axis === 'x';
|
|
}
|
|
isFullSize() {
|
|
return this.options.fullSize;
|
|
}
|
|
_convertTicksToLabels(ticks) {
|
|
this.beforeTickToLabelConversion();
|
|
this.generateTickLabels(ticks);
|
|
let i, ilen;
|
|
for (i = 0, ilen = ticks.length; i < ilen; i++) {
|
|
if (isNullOrUndef(ticks[i].label)) {
|
|
ticks.splice(i, 1);
|
|
ilen--;
|
|
i--;
|
|
}
|
|
}
|
|
this.afterTickToLabelConversion();
|
|
}
|
|
_getLabelSizes() {
|
|
let labelSizes = this._labelSizes;
|
|
if (!labelSizes) {
|
|
const sampleSize = this.options.ticks.sampleSize;
|
|
let ticks = this.ticks;
|
|
if (sampleSize < ticks.length) {
|
|
ticks = sample(ticks, sampleSize);
|
|
}
|
|
this._labelSizes = labelSizes = this._computeLabelSizes(ticks, ticks.length);
|
|
}
|
|
return labelSizes;
|
|
}
|
|
_computeLabelSizes(ticks, length) {
|
|
const {ctx, _longestTextCache: caches} = this;
|
|
const widths = [];
|
|
const heights = [];
|
|
let widestLabelSize = 0;
|
|
let highestLabelSize = 0;
|
|
let i, j, jlen, label, tickFont, fontString, cache, lineHeight, width, height, nestedLabel;
|
|
for (i = 0; i < length; ++i) {
|
|
label = ticks[i].label;
|
|
tickFont = this._resolveTickFontOptions(i);
|
|
ctx.font = fontString = tickFont.string;
|
|
cache = caches[fontString] = caches[fontString] || {data: {}, gc: []};
|
|
lineHeight = tickFont.lineHeight;
|
|
width = height = 0;
|
|
if (!isNullOrUndef(label) && !isArray(label)) {
|
|
width = _measureText(ctx, cache.data, cache.gc, width, label);
|
|
height = lineHeight;
|
|
} else if (isArray(label)) {
|
|
for (j = 0, jlen = label.length; j < jlen; ++j) {
|
|
nestedLabel = label[j];
|
|
if (!isNullOrUndef(nestedLabel) && !isArray(nestedLabel)) {
|
|
width = _measureText(ctx, cache.data, cache.gc, width, nestedLabel);
|
|
height += lineHeight;
|
|
}
|
|
}
|
|
}
|
|
widths.push(width);
|
|
heights.push(height);
|
|
widestLabelSize = Math.max(width, widestLabelSize);
|
|
highestLabelSize = Math.max(height, highestLabelSize);
|
|
}
|
|
garbageCollect(caches, length);
|
|
const widest = widths.indexOf(widestLabelSize);
|
|
const highest = heights.indexOf(highestLabelSize);
|
|
const valueAt = (idx) => ({width: widths[idx] || 0, height: heights[idx] || 0});
|
|
return {
|
|
first: valueAt(0),
|
|
last: valueAt(length - 1),
|
|
widest: valueAt(widest),
|
|
highest: valueAt(highest),
|
|
widths,
|
|
heights,
|
|
};
|
|
}
|
|
getLabelForValue(value) {
|
|
return value;
|
|
}
|
|
getPixelForValue(value, index) {
|
|
return NaN;
|
|
}
|
|
getValueForPixel(pixel) {}
|
|
getPixelForTick(index) {
|
|
const ticks = this.ticks;
|
|
if (index < 0 || index > ticks.length - 1) {
|
|
return null;
|
|
}
|
|
return this.getPixelForValue(ticks[index].value);
|
|
}
|
|
getPixelForDecimal(decimal) {
|
|
if (this._reversePixels) {
|
|
decimal = 1 - decimal;
|
|
}
|
|
const pixel = this._startPixel + decimal * this._length;
|
|
return _int16Range(this._alignToPixels ? _alignPixel(this.chart, pixel, 0) : pixel);
|
|
}
|
|
getDecimalForPixel(pixel) {
|
|
const decimal = (pixel - this._startPixel) / this._length;
|
|
return this._reversePixels ? 1 - decimal : decimal;
|
|
}
|
|
getBasePixel() {
|
|
return this.getPixelForValue(this.getBaseValue());
|
|
}
|
|
getBaseValue() {
|
|
const {min, max} = this;
|
|
return min < 0 && max < 0 ? max :
|
|
min > 0 && max > 0 ? min :
|
|
0;
|
|
}
|
|
getContext(index) {
|
|
const ticks = this.ticks || [];
|
|
if (index >= 0 && index < ticks.length) {
|
|
const tick = ticks[index];
|
|
return tick.$context ||
|
|
(tick.$context = createTickContext(this.getContext(), index, tick));
|
|
}
|
|
return this.$context ||
|
|
(this.$context = createScaleContext(this.chart.getContext(), this));
|
|
}
|
|
_tickSize() {
|
|
const optionTicks = this.options.ticks;
|
|
const rot = toRadians(this.labelRotation);
|
|
const cos = Math.abs(Math.cos(rot));
|
|
const sin = Math.abs(Math.sin(rot));
|
|
const labelSizes = this._getLabelSizes();
|
|
const padding = optionTicks.autoSkipPadding || 0;
|
|
const w = labelSizes ? labelSizes.widest.width + padding : 0;
|
|
const h = labelSizes ? labelSizes.highest.height + padding : 0;
|
|
return this.isHorizontal()
|
|
? h * cos > w * sin ? w / cos : h / sin
|
|
: h * sin < w * cos ? h / cos : w / sin;
|
|
}
|
|
_isVisible() {
|
|
const display = this.options.display;
|
|
if (display !== 'auto') {
|
|
return !!display;
|
|
}
|
|
return this.getMatchingVisibleMetas().length > 0;
|
|
}
|
|
_computeGridLineItems(chartArea) {
|
|
const axis = this.axis;
|
|
const chart = this.chart;
|
|
const options = this.options;
|
|
const {grid, position} = options;
|
|
const offset = grid.offset;
|
|
const isHorizontal = this.isHorizontal();
|
|
const ticks = this.ticks;
|
|
const ticksLength = ticks.length + (offset ? 1 : 0);
|
|
const tl = getTickMarkLength(grid);
|
|
const items = [];
|
|
const borderOpts = grid.setContext(this.getContext());
|
|
const axisWidth = borderOpts.drawBorder ? borderOpts.borderWidth : 0;
|
|
const axisHalfWidth = axisWidth / 2;
|
|
const alignBorderValue = function(pixel) {
|
|
return _alignPixel(chart, pixel, axisWidth);
|
|
};
|
|
let borderValue, i, lineValue, alignedLineValue;
|
|
let tx1, ty1, tx2, ty2, x1, y1, x2, y2;
|
|
if (position === 'top') {
|
|
borderValue = alignBorderValue(this.bottom);
|
|
ty1 = this.bottom - tl;
|
|
ty2 = borderValue - axisHalfWidth;
|
|
y1 = alignBorderValue(chartArea.top) + axisHalfWidth;
|
|
y2 = chartArea.bottom;
|
|
} else if (position === 'bottom') {
|
|
borderValue = alignBorderValue(this.top);
|
|
y1 = chartArea.top;
|
|
y2 = alignBorderValue(chartArea.bottom) - axisHalfWidth;
|
|
ty1 = borderValue + axisHalfWidth;
|
|
ty2 = this.top + tl;
|
|
} else if (position === 'left') {
|
|
borderValue = alignBorderValue(this.right);
|
|
tx1 = this.right - tl;
|
|
tx2 = borderValue - axisHalfWidth;
|
|
x1 = alignBorderValue(chartArea.left) + axisHalfWidth;
|
|
x2 = chartArea.right;
|
|
} else if (position === 'right') {
|
|
borderValue = alignBorderValue(this.left);
|
|
x1 = chartArea.left;
|
|
x2 = alignBorderValue(chartArea.right) - axisHalfWidth;
|
|
tx1 = borderValue + axisHalfWidth;
|
|
tx2 = this.left + tl;
|
|
} else if (axis === 'x') {
|
|
if (position === 'center') {
|
|
borderValue = alignBorderValue((chartArea.top + chartArea.bottom) / 2 + 0.5);
|
|
} else if (isObject(position)) {
|
|
const positionAxisID = Object.keys(position)[0];
|
|
const value = position[positionAxisID];
|
|
borderValue = alignBorderValue(this.chart.scales[positionAxisID].getPixelForValue(value));
|
|
}
|
|
y1 = chartArea.top;
|
|
y2 = chartArea.bottom;
|
|
ty1 = borderValue + axisHalfWidth;
|
|
ty2 = ty1 + tl;
|
|
} else if (axis === 'y') {
|
|
if (position === 'center') {
|
|
borderValue = alignBorderValue((chartArea.left + chartArea.right) / 2);
|
|
} else if (isObject(position)) {
|
|
const positionAxisID = Object.keys(position)[0];
|
|
const value = position[positionAxisID];
|
|
borderValue = alignBorderValue(this.chart.scales[positionAxisID].getPixelForValue(value));
|
|
}
|
|
tx1 = borderValue - axisHalfWidth;
|
|
tx2 = tx1 - tl;
|
|
x1 = chartArea.left;
|
|
x2 = chartArea.right;
|
|
}
|
|
const limit = valueOrDefault(options.ticks.maxTicksLimit, ticksLength);
|
|
const step = Math.max(1, Math.ceil(ticksLength / limit));
|
|
for (i = 0; i < ticksLength; i += step) {
|
|
const optsAtIndex = grid.setContext(this.getContext(i));
|
|
const lineWidth = optsAtIndex.lineWidth;
|
|
const lineColor = optsAtIndex.color;
|
|
const borderDash = optsAtIndex.borderDash || [];
|
|
const borderDashOffset = optsAtIndex.borderDashOffset;
|
|
const tickWidth = optsAtIndex.tickWidth;
|
|
const tickColor = optsAtIndex.tickColor;
|
|
const tickBorderDash = optsAtIndex.tickBorderDash || [];
|
|
const tickBorderDashOffset = optsAtIndex.tickBorderDashOffset;
|
|
lineValue = getPixelForGridLine(this, i, offset);
|
|
if (lineValue === undefined) {
|
|
continue;
|
|
}
|
|
alignedLineValue = _alignPixel(chart, lineValue, lineWidth);
|
|
if (isHorizontal) {
|
|
tx1 = tx2 = x1 = x2 = alignedLineValue;
|
|
} else {
|
|
ty1 = ty2 = y1 = y2 = alignedLineValue;
|
|
}
|
|
items.push({
|
|
tx1,
|
|
ty1,
|
|
tx2,
|
|
ty2,
|
|
x1,
|
|
y1,
|
|
x2,
|
|
y2,
|
|
width: lineWidth,
|
|
color: lineColor,
|
|
borderDash,
|
|
borderDashOffset,
|
|
tickWidth,
|
|
tickColor,
|
|
tickBorderDash,
|
|
tickBorderDashOffset,
|
|
});
|
|
}
|
|
this._ticksLength = ticksLength;
|
|
this._borderValue = borderValue;
|
|
return items;
|
|
}
|
|
_computeLabelItems(chartArea) {
|
|
const axis = this.axis;
|
|
const options = this.options;
|
|
const {position, ticks: optionTicks} = options;
|
|
const isHorizontal = this.isHorizontal();
|
|
const ticks = this.ticks;
|
|
const {align, crossAlign, padding, mirror} = optionTicks;
|
|
const tl = getTickMarkLength(options.grid);
|
|
const tickAndPadding = tl + padding;
|
|
const hTickAndPadding = mirror ? -padding : tickAndPadding;
|
|
const rotation = -toRadians(this.labelRotation);
|
|
const items = [];
|
|
let i, ilen, tick, label, x, y, textAlign, pixel, font, lineHeight, lineCount, textOffset;
|
|
let textBaseline = 'middle';
|
|
if (position === 'top') {
|
|
y = this.bottom - hTickAndPadding;
|
|
textAlign = this._getXAxisLabelAlignment();
|
|
} else if (position === 'bottom') {
|
|
y = this.top + hTickAndPadding;
|
|
textAlign = this._getXAxisLabelAlignment();
|
|
} else if (position === 'left') {
|
|
const ret = this._getYAxisLabelAlignment(tl);
|
|
textAlign = ret.textAlign;
|
|
x = ret.x;
|
|
} else if (position === 'right') {
|
|
const ret = this._getYAxisLabelAlignment(tl);
|
|
textAlign = ret.textAlign;
|
|
x = ret.x;
|
|
} else if (axis === 'x') {
|
|
if (position === 'center') {
|
|
y = ((chartArea.top + chartArea.bottom) / 2) + tickAndPadding;
|
|
} else if (isObject(position)) {
|
|
const positionAxisID = Object.keys(position)[0];
|
|
const value = position[positionAxisID];
|
|
y = this.chart.scales[positionAxisID].getPixelForValue(value) + tickAndPadding;
|
|
}
|
|
textAlign = this._getXAxisLabelAlignment();
|
|
} else if (axis === 'y') {
|
|
if (position === 'center') {
|
|
x = ((chartArea.left + chartArea.right) / 2) - tickAndPadding;
|
|
} else if (isObject(position)) {
|
|
const positionAxisID = Object.keys(position)[0];
|
|
const value = position[positionAxisID];
|
|
x = this.chart.scales[positionAxisID].getPixelForValue(value);
|
|
}
|
|
textAlign = this._getYAxisLabelAlignment(tl).textAlign;
|
|
}
|
|
if (axis === 'y') {
|
|
if (align === 'start') {
|
|
textBaseline = 'top';
|
|
} else if (align === 'end') {
|
|
textBaseline = 'bottom';
|
|
}
|
|
}
|
|
const labelSizes = this._getLabelSizes();
|
|
for (i = 0, ilen = ticks.length; i < ilen; ++i) {
|
|
tick = ticks[i];
|
|
label = tick.label;
|
|
const optsAtIndex = optionTicks.setContext(this.getContext(i));
|
|
pixel = this.getPixelForTick(i) + optionTicks.labelOffset;
|
|
font = this._resolveTickFontOptions(i);
|
|
lineHeight = font.lineHeight;
|
|
lineCount = isArray(label) ? label.length : 1;
|
|
const halfCount = lineCount / 2;
|
|
const color = optsAtIndex.color;
|
|
const strokeColor = optsAtIndex.textStrokeColor;
|
|
const strokeWidth = optsAtIndex.textStrokeWidth;
|
|
let tickTextAlign = textAlign;
|
|
if (isHorizontal) {
|
|
x = pixel;
|
|
if (textAlign === 'inner') {
|
|
if (i === ilen - 1) {
|
|
tickTextAlign = !this.options.reverse ? 'right' : 'left';
|
|
} else if (i === 0) {
|
|
tickTextAlign = !this.options.reverse ? 'left' : 'right';
|
|
} else {
|
|
tickTextAlign = 'center';
|
|
}
|
|
}
|
|
if (position === 'top') {
|
|
if (crossAlign === 'near' || rotation !== 0) {
|
|
textOffset = -lineCount * lineHeight + lineHeight / 2;
|
|
} else if (crossAlign === 'center') {
|
|
textOffset = -labelSizes.highest.height / 2 - halfCount * lineHeight + lineHeight;
|
|
} else {
|
|
textOffset = -labelSizes.highest.height + lineHeight / 2;
|
|
}
|
|
} else {
|
|
if (crossAlign === 'near' || rotation !== 0) {
|
|
textOffset = lineHeight / 2;
|
|
} else if (crossAlign === 'center') {
|
|
textOffset = labelSizes.highest.height / 2 - halfCount * lineHeight;
|
|
} else {
|
|
textOffset = labelSizes.highest.height - lineCount * lineHeight;
|
|
}
|
|
}
|
|
if (mirror) {
|
|
textOffset *= -1;
|
|
}
|
|
} else {
|
|
y = pixel;
|
|
textOffset = (1 - lineCount) * lineHeight / 2;
|
|
}
|
|
let backdrop;
|
|
if (optsAtIndex.showLabelBackdrop) {
|
|
const labelPadding = toPadding(optsAtIndex.backdropPadding);
|
|
const height = labelSizes.heights[i];
|
|
const width = labelSizes.widths[i];
|
|
let top = y + textOffset - labelPadding.top;
|
|
let left = x - labelPadding.left;
|
|
switch (textBaseline) {
|
|
case 'middle':
|
|
top -= height / 2;
|
|
break;
|
|
case 'bottom':
|
|
top -= height;
|
|
break;
|
|
}
|
|
switch (textAlign) {
|
|
case 'center':
|
|
left -= width / 2;
|
|
break;
|
|
case 'right':
|
|
left -= width;
|
|
break;
|
|
}
|
|
backdrop = {
|
|
left,
|
|
top,
|
|
width: width + labelPadding.width,
|
|
height: height + labelPadding.height,
|
|
color: optsAtIndex.backdropColor,
|
|
};
|
|
}
|
|
items.push({
|
|
rotation,
|
|
label,
|
|
font,
|
|
color,
|
|
strokeColor,
|
|
strokeWidth,
|
|
textOffset,
|
|
textAlign: tickTextAlign,
|
|
textBaseline,
|
|
translation: [x, y],
|
|
backdrop,
|
|
});
|
|
}
|
|
return items;
|
|
}
|
|
_getXAxisLabelAlignment() {
|
|
const {position, ticks} = this.options;
|
|
const rotation = -toRadians(this.labelRotation);
|
|
if (rotation) {
|
|
return position === 'top' ? 'left' : 'right';
|
|
}
|
|
let align = 'center';
|
|
if (ticks.align === 'start') {
|
|
align = 'left';
|
|
} else if (ticks.align === 'end') {
|
|
align = 'right';
|
|
} else if (ticks.align === 'inner') {
|
|
align = 'inner';
|
|
}
|
|
return align;
|
|
}
|
|
_getYAxisLabelAlignment(tl) {
|
|
const {position, ticks: {crossAlign, mirror, padding}} = this.options;
|
|
const labelSizes = this._getLabelSizes();
|
|
const tickAndPadding = tl + padding;
|
|
const widest = labelSizes.widest.width;
|
|
let textAlign;
|
|
let x;
|
|
if (position === 'left') {
|
|
if (mirror) {
|
|
x = this.right + padding;
|
|
if (crossAlign === 'near') {
|
|
textAlign = 'left';
|
|
} else if (crossAlign === 'center') {
|
|
textAlign = 'center';
|
|
x += (widest / 2);
|
|
} else {
|
|
textAlign = 'right';
|
|
x += widest;
|
|
}
|
|
} else {
|
|
x = this.right - tickAndPadding;
|
|
if (crossAlign === 'near') {
|
|
textAlign = 'right';
|
|
} else if (crossAlign === 'center') {
|
|
textAlign = 'center';
|
|
x -= (widest / 2);
|
|
} else {
|
|
textAlign = 'left';
|
|
x = this.left;
|
|
}
|
|
}
|
|
} else if (position === 'right') {
|
|
if (mirror) {
|
|
x = this.left + padding;
|
|
if (crossAlign === 'near') {
|
|
textAlign = 'right';
|
|
} else if (crossAlign === 'center') {
|
|
textAlign = 'center';
|
|
x -= (widest / 2);
|
|
} else {
|
|
textAlign = 'left';
|
|
x -= widest;
|
|
}
|
|
} else {
|
|
x = this.left + tickAndPadding;
|
|
if (crossAlign === 'near') {
|
|
textAlign = 'left';
|
|
} else if (crossAlign === 'center') {
|
|
textAlign = 'center';
|
|
x += widest / 2;
|
|
} else {
|
|
textAlign = 'right';
|
|
x = this.right;
|
|
}
|
|
}
|
|
} else {
|
|
textAlign = 'right';
|
|
}
|
|
return {textAlign, x};
|
|
}
|
|
_computeLabelArea() {
|
|
if (this.options.ticks.mirror) {
|
|
return;
|
|
}
|
|
const chart = this.chart;
|
|
const position = this.options.position;
|
|
if (position === 'left' || position === 'right') {
|
|
return {top: 0, left: this.left, bottom: chart.height, right: this.right};
|
|
} if (position === 'top' || position === 'bottom') {
|
|
return {top: this.top, left: 0, bottom: this.bottom, right: chart.width};
|
|
}
|
|
}
|
|
drawBackground() {
|
|
const {ctx, options: {backgroundColor}, left, top, width, height} = this;
|
|
if (backgroundColor) {
|
|
ctx.save();
|
|
ctx.fillStyle = backgroundColor;
|
|
ctx.fillRect(left, top, width, height);
|
|
ctx.restore();
|
|
}
|
|
}
|
|
getLineWidthForValue(value) {
|
|
const grid = this.options.grid;
|
|
if (!this._isVisible() || !grid.display) {
|
|
return 0;
|
|
}
|
|
const ticks = this.ticks;
|
|
const index = ticks.findIndex(t => t.value === value);
|
|
if (index >= 0) {
|
|
const opts = grid.setContext(this.getContext(index));
|
|
return opts.lineWidth;
|
|
}
|
|
return 0;
|
|
}
|
|
drawGrid(chartArea) {
|
|
const grid = this.options.grid;
|
|
const ctx = this.ctx;
|
|
const items = this._gridLineItems || (this._gridLineItems = this._computeGridLineItems(chartArea));
|
|
let i, ilen;
|
|
const drawLine = (p1, p2, style) => {
|
|
if (!style.width || !style.color) {
|
|
return;
|
|
}
|
|
ctx.save();
|
|
ctx.lineWidth = style.width;
|
|
ctx.strokeStyle = style.color;
|
|
ctx.setLineDash(style.borderDash || []);
|
|
ctx.lineDashOffset = style.borderDashOffset;
|
|
ctx.beginPath();
|
|
ctx.moveTo(p1.x, p1.y);
|
|
ctx.lineTo(p2.x, p2.y);
|
|
ctx.stroke();
|
|
ctx.restore();
|
|
};
|
|
if (grid.display) {
|
|
for (i = 0, ilen = items.length; i < ilen; ++i) {
|
|
const item = items[i];
|
|
if (grid.drawOnChartArea) {
|
|
drawLine(
|
|
{x: item.x1, y: item.y1},
|
|
{x: item.x2, y: item.y2},
|
|
item
|
|
);
|
|
}
|
|
if (grid.drawTicks) {
|
|
drawLine(
|
|
{x: item.tx1, y: item.ty1},
|
|
{x: item.tx2, y: item.ty2},
|
|
{
|
|
color: item.tickColor,
|
|
width: item.tickWidth,
|
|
borderDash: item.tickBorderDash,
|
|
borderDashOffset: item.tickBorderDashOffset
|
|
}
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
drawBorder() {
|
|
const {chart, ctx, options: {grid}} = this;
|
|
const borderOpts = grid.setContext(this.getContext());
|
|
const axisWidth = grid.drawBorder ? borderOpts.borderWidth : 0;
|
|
if (!axisWidth) {
|
|
return;
|
|
}
|
|
const lastLineWidth = grid.setContext(this.getContext(0)).lineWidth;
|
|
const borderValue = this._borderValue;
|
|
let x1, x2, y1, y2;
|
|
if (this.isHorizontal()) {
|
|
x1 = _alignPixel(chart, this.left, axisWidth) - axisWidth / 2;
|
|
x2 = _alignPixel(chart, this.right, lastLineWidth) + lastLineWidth / 2;
|
|
y1 = y2 = borderValue;
|
|
} else {
|
|
y1 = _alignPixel(chart, this.top, axisWidth) - axisWidth / 2;
|
|
y2 = _alignPixel(chart, this.bottom, lastLineWidth) + lastLineWidth / 2;
|
|
x1 = x2 = borderValue;
|
|
}
|
|
ctx.save();
|
|
ctx.lineWidth = borderOpts.borderWidth;
|
|
ctx.strokeStyle = borderOpts.borderColor;
|
|
ctx.beginPath();
|
|
ctx.moveTo(x1, y1);
|
|
ctx.lineTo(x2, y2);
|
|
ctx.stroke();
|
|
ctx.restore();
|
|
}
|
|
drawLabels(chartArea) {
|
|
const optionTicks = this.options.ticks;
|
|
if (!optionTicks.display) {
|
|
return;
|
|
}
|
|
const ctx = this.ctx;
|
|
const area = this._computeLabelArea();
|
|
if (area) {
|
|
clipArea(ctx, area);
|
|
}
|
|
const items = this._labelItems || (this._labelItems = this._computeLabelItems(chartArea));
|
|
let i, ilen;
|
|
for (i = 0, ilen = items.length; i < ilen; ++i) {
|
|
const item = items[i];
|
|
const tickFont = item.font;
|
|
const label = item.label;
|
|
if (item.backdrop) {
|
|
ctx.fillStyle = item.backdrop.color;
|
|
ctx.fillRect(item.backdrop.left, item.backdrop.top, item.backdrop.width, item.backdrop.height);
|
|
}
|
|
let y = item.textOffset;
|
|
renderText(ctx, label, 0, y, tickFont, item);
|
|
}
|
|
if (area) {
|
|
unclipArea(ctx);
|
|
}
|
|
}
|
|
drawTitle() {
|
|
const {ctx, options: {position, title, reverse}} = this;
|
|
if (!title.display) {
|
|
return;
|
|
}
|
|
const font = toFont(title.font);
|
|
const padding = toPadding(title.padding);
|
|
const align = title.align;
|
|
let offset = font.lineHeight / 2;
|
|
if (position === 'bottom' || position === 'center' || isObject(position)) {
|
|
offset += padding.bottom;
|
|
if (isArray(title.text)) {
|
|
offset += font.lineHeight * (title.text.length - 1);
|
|
}
|
|
} else {
|
|
offset += padding.top;
|
|
}
|
|
const {titleX, titleY, maxWidth, rotation} = titleArgs(this, offset, position, align);
|
|
renderText(ctx, title.text, 0, 0, font, {
|
|
color: title.color,
|
|
maxWidth,
|
|
rotation,
|
|
textAlign: titleAlign(align, position, reverse),
|
|
textBaseline: 'middle',
|
|
translation: [titleX, titleY],
|
|
});
|
|
}
|
|
draw(chartArea) {
|
|
if (!this._isVisible()) {
|
|
return;
|
|
}
|
|
this.drawBackground();
|
|
this.drawGrid(chartArea);
|
|
this.drawBorder();
|
|
this.drawTitle();
|
|
this.drawLabels(chartArea);
|
|
}
|
|
_layers() {
|
|
const opts = this.options;
|
|
const tz = opts.ticks && opts.ticks.z || 0;
|
|
const gz = valueOrDefault(opts.grid && opts.grid.z, -1);
|
|
if (!this._isVisible() || this.draw !== Scale.prototype.draw) {
|
|
return [{
|
|
z: tz,
|
|
draw: (chartArea) => {
|
|
this.draw(chartArea);
|
|
}
|
|
}];
|
|
}
|
|
return [{
|
|
z: gz,
|
|
draw: (chartArea) => {
|
|
this.drawBackground();
|
|
this.drawGrid(chartArea);
|
|
this.drawTitle();
|
|
}
|
|
}, {
|
|
z: gz + 1,
|
|
draw: () => {
|
|
this.drawBorder();
|
|
}
|
|
}, {
|
|
z: tz,
|
|
draw: (chartArea) => {
|
|
this.drawLabels(chartArea);
|
|
}
|
|
}];
|
|
}
|
|
getMatchingVisibleMetas(type) {
|
|
const metas = this.chart.getSortedVisibleDatasetMetas();
|
|
const axisID = this.axis + 'AxisID';
|
|
const result = [];
|
|
let i, ilen;
|
|
for (i = 0, ilen = metas.length; i < ilen; ++i) {
|
|
const meta = metas[i];
|
|
if (meta[axisID] === this.id && (!type || meta.type === type)) {
|
|
result.push(meta);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
_resolveTickFontOptions(index) {
|
|
const opts = this.options.ticks.setContext(this.getContext(index));
|
|
return toFont(opts.font);
|
|
}
|
|
_maxDigits() {
|
|
const fontSize = this._resolveTickFontOptions(0).lineHeight;
|
|
return (this.isHorizontal() ? this.width : this.height) / fontSize;
|
|
}
|
|
}
|
|
|
|
class TypedRegistry {
|
|
constructor(type, scope, override) {
|
|
this.type = type;
|
|
this.scope = scope;
|
|
this.override = override;
|
|
this.items = Object.create(null);
|
|
}
|
|
isForType(type) {
|
|
return Object.prototype.isPrototypeOf.call(this.type.prototype, type.prototype);
|
|
}
|
|
register(item) {
|
|
const proto = Object.getPrototypeOf(item);
|
|
let parentScope;
|
|
if (isIChartComponent(proto)) {
|
|
parentScope = this.register(proto);
|
|
}
|
|
const items = this.items;
|
|
const id = item.id;
|
|
const scope = this.scope + '.' + id;
|
|
if (!id) {
|
|
throw new Error('class does not have id: ' + item);
|
|
}
|
|
if (id in items) {
|
|
return scope;
|
|
}
|
|
items[id] = item;
|
|
registerDefaults(item, scope, parentScope);
|
|
if (this.override) {
|
|
defaults.override(item.id, item.overrides);
|
|
}
|
|
return scope;
|
|
}
|
|
get(id) {
|
|
return this.items[id];
|
|
}
|
|
unregister(item) {
|
|
const items = this.items;
|
|
const id = item.id;
|
|
const scope = this.scope;
|
|
if (id in items) {
|
|
delete items[id];
|
|
}
|
|
if (scope && id in defaults[scope]) {
|
|
delete defaults[scope][id];
|
|
if (this.override) {
|
|
delete overrides[id];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
function registerDefaults(item, scope, parentScope) {
|
|
const itemDefaults = merge(Object.create(null), [
|
|
parentScope ? defaults.get(parentScope) : {},
|
|
defaults.get(scope),
|
|
item.defaults
|
|
]);
|
|
defaults.set(scope, itemDefaults);
|
|
if (item.defaultRoutes) {
|
|
routeDefaults(scope, item.defaultRoutes);
|
|
}
|
|
if (item.descriptors) {
|
|
defaults.describe(scope, item.descriptors);
|
|
}
|
|
}
|
|
function routeDefaults(scope, routes) {
|
|
Object.keys(routes).forEach(property => {
|
|
const propertyParts = property.split('.');
|
|
const sourceName = propertyParts.pop();
|
|
const sourceScope = [scope].concat(propertyParts).join('.');
|
|
const parts = routes[property].split('.');
|
|
const targetName = parts.pop();
|
|
const targetScope = parts.join('.');
|
|
defaults.route(sourceScope, sourceName, targetScope, targetName);
|
|
});
|
|
}
|
|
function isIChartComponent(proto) {
|
|
return 'id' in proto && 'defaults' in proto;
|
|
}
|
|
|
|
class Registry {
|
|
constructor() {
|
|
this.controllers = new TypedRegistry(DatasetController, 'datasets', true);
|
|
this.elements = new TypedRegistry(Element, 'elements');
|
|
this.plugins = new TypedRegistry(Object, 'plugins');
|
|
this.scales = new TypedRegistry(Scale, 'scales');
|
|
this._typedRegistries = [this.controllers, this.scales, this.elements];
|
|
}
|
|
add(...args) {
|
|
this._each('register', args);
|
|
}
|
|
remove(...args) {
|
|
this._each('unregister', args);
|
|
}
|
|
addControllers(...args) {
|
|
this._each('register', args, this.controllers);
|
|
}
|
|
addElements(...args) {
|
|
this._each('register', args, this.elements);
|
|
}
|
|
addPlugins(...args) {
|
|
this._each('register', args, this.plugins);
|
|
}
|
|
addScales(...args) {
|
|
this._each('register', args, this.scales);
|
|
}
|
|
getController(id) {
|
|
return this._get(id, this.controllers, 'controller');
|
|
}
|
|
getElement(id) {
|
|
return this._get(id, this.elements, 'element');
|
|
}
|
|
getPlugin(id) {
|
|
return this._get(id, this.plugins, 'plugin');
|
|
}
|
|
getScale(id) {
|
|
return this._get(id, this.scales, 'scale');
|
|
}
|
|
removeControllers(...args) {
|
|
this._each('unregister', args, this.controllers);
|
|
}
|
|
removeElements(...args) {
|
|
this._each('unregister', args, this.elements);
|
|
}
|
|
removePlugins(...args) {
|
|
this._each('unregister', args, this.plugins);
|
|
}
|
|
removeScales(...args) {
|
|
this._each('unregister', args, this.scales);
|
|
}
|
|
_each(method, args, typedRegistry) {
|
|
[...args].forEach(arg => {
|
|
const reg = typedRegistry || this._getRegistryForType(arg);
|
|
if (typedRegistry || reg.isForType(arg) || (reg === this.plugins && arg.id)) {
|
|
this._exec(method, reg, arg);
|
|
} else {
|
|
each(arg, item => {
|
|
const itemReg = typedRegistry || this._getRegistryForType(item);
|
|
this._exec(method, itemReg, item);
|
|
});
|
|
}
|
|
});
|
|
}
|
|
_exec(method, registry, component) {
|
|
const camelMethod = _capitalize(method);
|
|
callback(component['before' + camelMethod], [], component);
|
|
registry[method](component);
|
|
callback(component['after' + camelMethod], [], component);
|
|
}
|
|
_getRegistryForType(type) {
|
|
for (let i = 0; i < this._typedRegistries.length; i++) {
|
|
const reg = this._typedRegistries[i];
|
|
if (reg.isForType(type)) {
|
|
return reg;
|
|
}
|
|
}
|
|
return this.plugins;
|
|
}
|
|
_get(id, typedRegistry, type) {
|
|
const item = typedRegistry.get(id);
|
|
if (item === undefined) {
|
|
throw new Error('"' + id + '" is not a registered ' + type + '.');
|
|
}
|
|
return item;
|
|
}
|
|
}
|
|
var registry = new Registry();
|
|
|
|
class ScatterController extends DatasetController {
|
|
update(mode) {
|
|
const meta = this._cachedMeta;
|
|
const {data: points = []} = meta;
|
|
const animationsDisabled = this.chart._animationsDisabled;
|
|
let {start, count} = _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled);
|
|
this._drawStart = start;
|
|
this._drawCount = count;
|
|
if (_scaleRangesChanged(meta)) {
|
|
start = 0;
|
|
count = points.length;
|
|
}
|
|
if (this.options.showLine) {
|
|
const {dataset: line, _dataset} = meta;
|
|
line._chart = this.chart;
|
|
line._datasetIndex = this.index;
|
|
line._decimated = !!_dataset._decimated;
|
|
line.points = points;
|
|
const options = this.resolveDatasetElementOptions(mode);
|
|
options.segment = this.options.segment;
|
|
this.updateElement(line, undefined, {
|
|
animated: !animationsDisabled,
|
|
options
|
|
}, mode);
|
|
}
|
|
this.updateElements(points, start, count, mode);
|
|
}
|
|
addElements() {
|
|
const {showLine} = this.options;
|
|
if (!this.datasetElementType && showLine) {
|
|
this.datasetElementType = registry.getElement('line');
|
|
}
|
|
super.addElements();
|
|
}
|
|
updateElements(points, start, count, mode) {
|
|
const reset = mode === 'reset';
|
|
const {iScale, vScale, _stacked, _dataset} = this._cachedMeta;
|
|
const firstOpts = this.resolveDataElementOptions(start, mode);
|
|
const sharedOptions = this.getSharedOptions(firstOpts);
|
|
const includeOptions = this.includeOptions(mode, sharedOptions);
|
|
const iAxis = iScale.axis;
|
|
const vAxis = vScale.axis;
|
|
const {spanGaps, segment} = this.options;
|
|
const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;
|
|
const directUpdate = this.chart._animationsDisabled || reset || mode === 'none';
|
|
let prevParsed = start > 0 && this.getParsed(start - 1);
|
|
for (let i = start; i < start + count; ++i) {
|
|
const point = points[i];
|
|
const parsed = this.getParsed(i);
|
|
const properties = directUpdate ? point : {};
|
|
const nullData = isNullOrUndef(parsed[vAxis]);
|
|
const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);
|
|
const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? this.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);
|
|
properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;
|
|
properties.stop = i > 0 && (Math.abs(parsed[iAxis] - prevParsed[iAxis])) > maxGapLength;
|
|
if (segment) {
|
|
properties.parsed = parsed;
|
|
properties.raw = _dataset.data[i];
|
|
}
|
|
if (includeOptions) {
|
|
properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);
|
|
}
|
|
if (!directUpdate) {
|
|
this.updateElement(point, i, properties, mode);
|
|
}
|
|
prevParsed = parsed;
|
|
}
|
|
this.updateSharedOptions(sharedOptions, mode, firstOpts);
|
|
}
|
|
getMaxOverflow() {
|
|
const meta = this._cachedMeta;
|
|
const data = meta.data || [];
|
|
if (!this.options.showLine) {
|
|
let max = 0;
|
|
for (let i = data.length - 1; i >= 0; --i) {
|
|
max = Math.max(max, data[i].size(this.resolveDataElementOptions(i)) / 2);
|
|
}
|
|
return max > 0 && max;
|
|
}
|
|
const dataset = meta.dataset;
|
|
const border = dataset.options && dataset.options.borderWidth || 0;
|
|
if (!data.length) {
|
|
return border;
|
|
}
|
|
const firstPoint = data[0].size(this.resolveDataElementOptions(0));
|
|
const lastPoint = data[data.length - 1].size(this.resolveDataElementOptions(data.length - 1));
|
|
return Math.max(border, firstPoint, lastPoint) / 2;
|
|
}
|
|
}
|
|
ScatterController.id = 'scatter';
|
|
ScatterController.defaults = {
|
|
datasetElementType: false,
|
|
dataElementType: 'point',
|
|
showLine: false,
|
|
fill: false
|
|
};
|
|
ScatterController.overrides = {
|
|
interaction: {
|
|
mode: 'point'
|
|
},
|
|
plugins: {
|
|
tooltip: {
|
|
callbacks: {
|
|
title() {
|
|
return '';
|
|
},
|
|
label(item) {
|
|
return '(' + item.label + ', ' + item.formattedValue + ')';
|
|
}
|
|
}
|
|
}
|
|
},
|
|
scales: {
|
|
x: {
|
|
type: 'linear'
|
|
},
|
|
y: {
|
|
type: 'linear'
|
|
}
|
|
}
|
|
};
|
|
|
|
var controllers = /*#__PURE__*/Object.freeze({
|
|
__proto__: null,
|
|
BarController: BarController,
|
|
BubbleController: BubbleController,
|
|
DoughnutController: DoughnutController,
|
|
LineController: LineController,
|
|
PolarAreaController: PolarAreaController,
|
|
PieController: PieController,
|
|
RadarController: RadarController,
|
|
ScatterController: ScatterController
|
|
});
|
|
|
|
function abstract() {
|
|
throw new Error('This method is not implemented: Check that a complete date adapter is provided.');
|
|
}
|
|
class DateAdapter {
|
|
constructor(options) {
|
|
this.options = options || {};
|
|
}
|
|
init(chartOptions) {}
|
|
formats() {
|
|
return abstract();
|
|
}
|
|
parse(value, format) {
|
|
return abstract();
|
|
}
|
|
format(timestamp, format) {
|
|
return abstract();
|
|
}
|
|
add(timestamp, amount, unit) {
|
|
return abstract();
|
|
}
|
|
diff(a, b, unit) {
|
|
return abstract();
|
|
}
|
|
startOf(timestamp, unit, weekday) {
|
|
return abstract();
|
|
}
|
|
endOf(timestamp, unit) {
|
|
return abstract();
|
|
}
|
|
}
|
|
DateAdapter.override = function(members) {
|
|
Object.assign(DateAdapter.prototype, members);
|
|
};
|
|
var adapters = {
|
|
_date: DateAdapter
|
|
};
|
|
|
|
function binarySearch(metaset, axis, value, intersect) {
|
|
const {controller, data, _sorted} = metaset;
|
|
const iScale = controller._cachedMeta.iScale;
|
|
if (iScale && axis === iScale.axis && axis !== 'r' && _sorted && data.length) {
|
|
const lookupMethod = iScale._reversePixels ? _rlookupByKey : _lookupByKey;
|
|
if (!intersect) {
|
|
return lookupMethod(data, axis, value);
|
|
} else if (controller._sharedOptions) {
|
|
const el = data[0];
|
|
const range = typeof el.getRange === 'function' && el.getRange(axis);
|
|
if (range) {
|
|
const start = lookupMethod(data, axis, value - range);
|
|
const end = lookupMethod(data, axis, value + range);
|
|
return {lo: start.lo, hi: end.hi};
|
|
}
|
|
}
|
|
}
|
|
return {lo: 0, hi: data.length - 1};
|
|
}
|
|
function evaluateInteractionItems(chart, axis, position, handler, intersect) {
|
|
const metasets = chart.getSortedVisibleDatasetMetas();
|
|
const value = position[axis];
|
|
for (let i = 0, ilen = metasets.length; i < ilen; ++i) {
|
|
const {index, data} = metasets[i];
|
|
const {lo, hi} = binarySearch(metasets[i], axis, value, intersect);
|
|
for (let j = lo; j <= hi; ++j) {
|
|
const element = data[j];
|
|
if (!element.skip) {
|
|
handler(element, index, j);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
function getDistanceMetricForAxis(axis) {
|
|
const useX = axis.indexOf('x') !== -1;
|
|
const useY = axis.indexOf('y') !== -1;
|
|
return function(pt1, pt2) {
|
|
const deltaX = useX ? Math.abs(pt1.x - pt2.x) : 0;
|
|
const deltaY = useY ? Math.abs(pt1.y - pt2.y) : 0;
|
|
return Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2));
|
|
};
|
|
}
|
|
function getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) {
|
|
const items = [];
|
|
if (!includeInvisible && !chart.isPointInArea(position)) {
|
|
return items;
|
|
}
|
|
const evaluationFunc = function(element, datasetIndex, index) {
|
|
if (!includeInvisible && !_isPointInArea(element, chart.chartArea, 0)) {
|
|
return;
|
|
}
|
|
if (element.inRange(position.x, position.y, useFinalPosition)) {
|
|
items.push({element, datasetIndex, index});
|
|
}
|
|
};
|
|
evaluateInteractionItems(chart, axis, position, evaluationFunc, true);
|
|
return items;
|
|
}
|
|
function getNearestRadialItems(chart, position, axis, useFinalPosition) {
|
|
let items = [];
|
|
function evaluationFunc(element, datasetIndex, index) {
|
|
const {startAngle, endAngle} = element.getProps(['startAngle', 'endAngle'], useFinalPosition);
|
|
const {angle} = getAngleFromPoint(element, {x: position.x, y: position.y});
|
|
if (_angleBetween(angle, startAngle, endAngle)) {
|
|
items.push({element, datasetIndex, index});
|
|
}
|
|
}
|
|
evaluateInteractionItems(chart, axis, position, evaluationFunc);
|
|
return items;
|
|
}
|
|
function getNearestCartesianItems(chart, position, axis, intersect, useFinalPosition, includeInvisible) {
|
|
let items = [];
|
|
const distanceMetric = getDistanceMetricForAxis(axis);
|
|
let minDistance = Number.POSITIVE_INFINITY;
|
|
function evaluationFunc(element, datasetIndex, index) {
|
|
const inRange = element.inRange(position.x, position.y, useFinalPosition);
|
|
if (intersect && !inRange) {
|
|
return;
|
|
}
|
|
const center = element.getCenterPoint(useFinalPosition);
|
|
const pointInArea = !!includeInvisible || chart.isPointInArea(center);
|
|
if (!pointInArea && !inRange) {
|
|
return;
|
|
}
|
|
const distance = distanceMetric(position, center);
|
|
if (distance < minDistance) {
|
|
items = [{element, datasetIndex, index}];
|
|
minDistance = distance;
|
|
} else if (distance === minDistance) {
|
|
items.push({element, datasetIndex, index});
|
|
}
|
|
}
|
|
evaluateInteractionItems(chart, axis, position, evaluationFunc);
|
|
return items;
|
|
}
|
|
function getNearestItems(chart, position, axis, intersect, useFinalPosition, includeInvisible) {
|
|
if (!includeInvisible && !chart.isPointInArea(position)) {
|
|
return [];
|
|
}
|
|
return axis === 'r' && !intersect
|
|
? getNearestRadialItems(chart, position, axis, useFinalPosition)
|
|
: getNearestCartesianItems(chart, position, axis, intersect, useFinalPosition, includeInvisible);
|
|
}
|
|
function getAxisItems(chart, position, axis, intersect, useFinalPosition) {
|
|
const items = [];
|
|
const rangeMethod = axis === 'x' ? 'inXRange' : 'inYRange';
|
|
let intersectsItem = false;
|
|
evaluateInteractionItems(chart, axis, position, (element, datasetIndex, index) => {
|
|
if (element[rangeMethod](position[axis], useFinalPosition)) {
|
|
items.push({element, datasetIndex, index});
|
|
intersectsItem = intersectsItem || element.inRange(position.x, position.y, useFinalPosition);
|
|
}
|
|
});
|
|
if (intersect && !intersectsItem) {
|
|
return [];
|
|
}
|
|
return items;
|
|
}
|
|
var Interaction = {
|
|
evaluateInteractionItems,
|
|
modes: {
|
|
index(chart, e, options, useFinalPosition) {
|
|
const position = getRelativePosition(e, chart);
|
|
const axis = options.axis || 'x';
|
|
const includeInvisible = options.includeInvisible || false;
|
|
const items = options.intersect
|
|
? getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible)
|
|
: getNearestItems(chart, position, axis, false, useFinalPosition, includeInvisible);
|
|
const elements = [];
|
|
if (!items.length) {
|
|
return [];
|
|
}
|
|
chart.getSortedVisibleDatasetMetas().forEach((meta) => {
|
|
const index = items[0].index;
|
|
const element = meta.data[index];
|
|
if (element && !element.skip) {
|
|
elements.push({element, datasetIndex: meta.index, index});
|
|
}
|
|
});
|
|
return elements;
|
|
},
|
|
dataset(chart, e, options, useFinalPosition) {
|
|
const position = getRelativePosition(e, chart);
|
|
const axis = options.axis || 'xy';
|
|
const includeInvisible = options.includeInvisible || false;
|
|
let items = options.intersect
|
|
? getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) :
|
|
getNearestItems(chart, position, axis, false, useFinalPosition, includeInvisible);
|
|
if (items.length > 0) {
|
|
const datasetIndex = items[0].datasetIndex;
|
|
const data = chart.getDatasetMeta(datasetIndex).data;
|
|
items = [];
|
|
for (let i = 0; i < data.length; ++i) {
|
|
items.push({element: data[i], datasetIndex, index: i});
|
|
}
|
|
}
|
|
return items;
|
|
},
|
|
point(chart, e, options, useFinalPosition) {
|
|
const position = getRelativePosition(e, chart);
|
|
const axis = options.axis || 'xy';
|
|
const includeInvisible = options.includeInvisible || false;
|
|
return getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible);
|
|
},
|
|
nearest(chart, e, options, useFinalPosition) {
|
|
const position = getRelativePosition(e, chart);
|
|
const axis = options.axis || 'xy';
|
|
const includeInvisible = options.includeInvisible || false;
|
|
return getNearestItems(chart, position, axis, options.intersect, useFinalPosition, includeInvisible);
|
|
},
|
|
x(chart, e, options, useFinalPosition) {
|
|
const position = getRelativePosition(e, chart);
|
|
return getAxisItems(chart, position, 'x', options.intersect, useFinalPosition);
|
|
},
|
|
y(chart, e, options, useFinalPosition) {
|
|
const position = getRelativePosition(e, chart);
|
|
return getAxisItems(chart, position, 'y', options.intersect, useFinalPosition);
|
|
}
|
|
}
|
|
};
|
|
|
|
const STATIC_POSITIONS = ['left', 'top', 'right', 'bottom'];
|
|
function filterByPosition(array, position) {
|
|
return array.filter(v => v.pos === position);
|
|
}
|
|
function filterDynamicPositionByAxis(array, axis) {
|
|
return array.filter(v => STATIC_POSITIONS.indexOf(v.pos) === -1 && v.box.axis === axis);
|
|
}
|
|
function sortByWeight(array, reverse) {
|
|
return array.sort((a, b) => {
|
|
const v0 = reverse ? b : a;
|
|
const v1 = reverse ? a : b;
|
|
return v0.weight === v1.weight ?
|
|
v0.index - v1.index :
|
|
v0.weight - v1.weight;
|
|
});
|
|
}
|
|
function wrapBoxes(boxes) {
|
|
const layoutBoxes = [];
|
|
let i, ilen, box, pos, stack, stackWeight;
|
|
for (i = 0, ilen = (boxes || []).length; i < ilen; ++i) {
|
|
box = boxes[i];
|
|
({position: pos, options: {stack, stackWeight = 1}} = box);
|
|
layoutBoxes.push({
|
|
index: i,
|
|
box,
|
|
pos,
|
|
horizontal: box.isHorizontal(),
|
|
weight: box.weight,
|
|
stack: stack && (pos + stack),
|
|
stackWeight
|
|
});
|
|
}
|
|
return layoutBoxes;
|
|
}
|
|
function buildStacks(layouts) {
|
|
const stacks = {};
|
|
for (const wrap of layouts) {
|
|
const {stack, pos, stackWeight} = wrap;
|
|
if (!stack || !STATIC_POSITIONS.includes(pos)) {
|
|
continue;
|
|
}
|
|
const _stack = stacks[stack] || (stacks[stack] = {count: 0, placed: 0, weight: 0, size: 0});
|
|
_stack.count++;
|
|
_stack.weight += stackWeight;
|
|
}
|
|
return stacks;
|
|
}
|
|
function setLayoutDims(layouts, params) {
|
|
const stacks = buildStacks(layouts);
|
|
const {vBoxMaxWidth, hBoxMaxHeight} = params;
|
|
let i, ilen, layout;
|
|
for (i = 0, ilen = layouts.length; i < ilen; ++i) {
|
|
layout = layouts[i];
|
|
const {fullSize} = layout.box;
|
|
const stack = stacks[layout.stack];
|
|
const factor = stack && layout.stackWeight / stack.weight;
|
|
if (layout.horizontal) {
|
|
layout.width = factor ? factor * vBoxMaxWidth : fullSize && params.availableWidth;
|
|
layout.height = hBoxMaxHeight;
|
|
} else {
|
|
layout.width = vBoxMaxWidth;
|
|
layout.height = factor ? factor * hBoxMaxHeight : fullSize && params.availableHeight;
|
|
}
|
|
}
|
|
return stacks;
|
|
}
|
|
function buildLayoutBoxes(boxes) {
|
|
const layoutBoxes = wrapBoxes(boxes);
|
|
const fullSize = sortByWeight(layoutBoxes.filter(wrap => wrap.box.fullSize), true);
|
|
const left = sortByWeight(filterByPosition(layoutBoxes, 'left'), true);
|
|
const right = sortByWeight(filterByPosition(layoutBoxes, 'right'));
|
|
const top = sortByWeight(filterByPosition(layoutBoxes, 'top'), true);
|
|
const bottom = sortByWeight(filterByPosition(layoutBoxes, 'bottom'));
|
|
const centerHorizontal = filterDynamicPositionByAxis(layoutBoxes, 'x');
|
|
const centerVertical = filterDynamicPositionByAxis(layoutBoxes, 'y');
|
|
return {
|
|
fullSize,
|
|
leftAndTop: left.concat(top),
|
|
rightAndBottom: right.concat(centerVertical).concat(bottom).concat(centerHorizontal),
|
|
chartArea: filterByPosition(layoutBoxes, 'chartArea'),
|
|
vertical: left.concat(right).concat(centerVertical),
|
|
horizontal: top.concat(bottom).concat(centerHorizontal)
|
|
};
|
|
}
|
|
function getCombinedMax(maxPadding, chartArea, a, b) {
|
|
return Math.max(maxPadding[a], chartArea[a]) + Math.max(maxPadding[b], chartArea[b]);
|
|
}
|
|
function updateMaxPadding(maxPadding, boxPadding) {
|
|
maxPadding.top = Math.max(maxPadding.top, boxPadding.top);
|
|
maxPadding.left = Math.max(maxPadding.left, boxPadding.left);
|
|
maxPadding.bottom = Math.max(maxPadding.bottom, boxPadding.bottom);
|
|
maxPadding.right = Math.max(maxPadding.right, boxPadding.right);
|
|
}
|
|
function updateDims(chartArea, params, layout, stacks) {
|
|
const {pos, box} = layout;
|
|
const maxPadding = chartArea.maxPadding;
|
|
if (!isObject(pos)) {
|
|
if (layout.size) {
|
|
chartArea[pos] -= layout.size;
|
|
}
|
|
const stack = stacks[layout.stack] || {size: 0, count: 1};
|
|
stack.size = Math.max(stack.size, layout.horizontal ? box.height : box.width);
|
|
layout.size = stack.size / stack.count;
|
|
chartArea[pos] += layout.size;
|
|
}
|
|
if (box.getPadding) {
|
|
updateMaxPadding(maxPadding, box.getPadding());
|
|
}
|
|
const newWidth = Math.max(0, params.outerWidth - getCombinedMax(maxPadding, chartArea, 'left', 'right'));
|
|
const newHeight = Math.max(0, params.outerHeight - getCombinedMax(maxPadding, chartArea, 'top', 'bottom'));
|
|
const widthChanged = newWidth !== chartArea.w;
|
|
const heightChanged = newHeight !== chartArea.h;
|
|
chartArea.w = newWidth;
|
|
chartArea.h = newHeight;
|
|
return layout.horizontal
|
|
? {same: widthChanged, other: heightChanged}
|
|
: {same: heightChanged, other: widthChanged};
|
|
}
|
|
function handleMaxPadding(chartArea) {
|
|
const maxPadding = chartArea.maxPadding;
|
|
function updatePos(pos) {
|
|
const change = Math.max(maxPadding[pos] - chartArea[pos], 0);
|
|
chartArea[pos] += change;
|
|
return change;
|
|
}
|
|
chartArea.y += updatePos('top');
|
|
chartArea.x += updatePos('left');
|
|
updatePos('right');
|
|
updatePos('bottom');
|
|
}
|
|
function getMargins(horizontal, chartArea) {
|
|
const maxPadding = chartArea.maxPadding;
|
|
function marginForPositions(positions) {
|
|
const margin = {left: 0, top: 0, right: 0, bottom: 0};
|
|
positions.forEach((pos) => {
|
|
margin[pos] = Math.max(chartArea[pos], maxPadding[pos]);
|
|
});
|
|
return margin;
|
|
}
|
|
return horizontal
|
|
? marginForPositions(['left', 'right'])
|
|
: marginForPositions(['top', 'bottom']);
|
|
}
|
|
function fitBoxes(boxes, chartArea, params, stacks) {
|
|
const refitBoxes = [];
|
|
let i, ilen, layout, box, refit, changed;
|
|
for (i = 0, ilen = boxes.length, refit = 0; i < ilen; ++i) {
|
|
layout = boxes[i];
|
|
box = layout.box;
|
|
box.update(
|
|
layout.width || chartArea.w,
|
|
layout.height || chartArea.h,
|
|
getMargins(layout.horizontal, chartArea)
|
|
);
|
|
const {same, other} = updateDims(chartArea, params, layout, stacks);
|
|
refit |= same && refitBoxes.length;
|
|
changed = changed || other;
|
|
if (!box.fullSize) {
|
|
refitBoxes.push(layout);
|
|
}
|
|
}
|
|
return refit && fitBoxes(refitBoxes, chartArea, params, stacks) || changed;
|
|
}
|
|
function setBoxDims(box, left, top, width, height) {
|
|
box.top = top;
|
|
box.left = left;
|
|
box.right = left + width;
|
|
box.bottom = top + height;
|
|
box.width = width;
|
|
box.height = height;
|
|
}
|
|
function placeBoxes(boxes, chartArea, params, stacks) {
|
|
const userPadding = params.padding;
|
|
let {x, y} = chartArea;
|
|
for (const layout of boxes) {
|
|
const box = layout.box;
|
|
const stack = stacks[layout.stack] || {count: 1, placed: 0, weight: 1};
|
|
const weight = (layout.stackWeight / stack.weight) || 1;
|
|
if (layout.horizontal) {
|
|
const width = chartArea.w * weight;
|
|
const height = stack.size || box.height;
|
|
if (defined(stack.start)) {
|
|
y = stack.start;
|
|
}
|
|
if (box.fullSize) {
|
|
setBoxDims(box, userPadding.left, y, params.outerWidth - userPadding.right - userPadding.left, height);
|
|
} else {
|
|
setBoxDims(box, chartArea.left + stack.placed, y, width, height);
|
|
}
|
|
stack.start = y;
|
|
stack.placed += width;
|
|
y = box.bottom;
|
|
} else {
|
|
const height = chartArea.h * weight;
|
|
const width = stack.size || box.width;
|
|
if (defined(stack.start)) {
|
|
x = stack.start;
|
|
}
|
|
if (box.fullSize) {
|
|
setBoxDims(box, x, userPadding.top, width, params.outerHeight - userPadding.bottom - userPadding.top);
|
|
} else {
|
|
setBoxDims(box, x, chartArea.top + stack.placed, width, height);
|
|
}
|
|
stack.start = x;
|
|
stack.placed += height;
|
|
x = box.right;
|
|
}
|
|
}
|
|
chartArea.x = x;
|
|
chartArea.y = y;
|
|
}
|
|
defaults.set('layout', {
|
|
autoPadding: true,
|
|
padding: {
|
|
top: 0,
|
|
right: 0,
|
|
bottom: 0,
|
|
left: 0
|
|
}
|
|
});
|
|
var layouts = {
|
|
addBox(chart, item) {
|
|
if (!chart.boxes) {
|
|
chart.boxes = [];
|
|
}
|
|
item.fullSize = item.fullSize || false;
|
|
item.position = item.position || 'top';
|
|
item.weight = item.weight || 0;
|
|
item._layers = item._layers || function() {
|
|
return [{
|
|
z: 0,
|
|
draw(chartArea) {
|
|
item.draw(chartArea);
|
|
}
|
|
}];
|
|
};
|
|
chart.boxes.push(item);
|
|
},
|
|
removeBox(chart, layoutItem) {
|
|
const index = chart.boxes ? chart.boxes.indexOf(layoutItem) : -1;
|
|
if (index !== -1) {
|
|
chart.boxes.splice(index, 1);
|
|
}
|
|
},
|
|
configure(chart, item, options) {
|
|
item.fullSize = options.fullSize;
|
|
item.position = options.position;
|
|
item.weight = options.weight;
|
|
},
|
|
update(chart, width, height, minPadding) {
|
|
if (!chart) {
|
|
return;
|
|
}
|
|
const padding = toPadding(chart.options.layout.padding);
|
|
const availableWidth = Math.max(width - padding.width, 0);
|
|
const availableHeight = Math.max(height - padding.height, 0);
|
|
const boxes = buildLayoutBoxes(chart.boxes);
|
|
const verticalBoxes = boxes.vertical;
|
|
const horizontalBoxes = boxes.horizontal;
|
|
each(chart.boxes, box => {
|
|
if (typeof box.beforeLayout === 'function') {
|
|
box.beforeLayout();
|
|
}
|
|
});
|
|
const visibleVerticalBoxCount = verticalBoxes.reduce((total, wrap) =>
|
|
wrap.box.options && wrap.box.options.display === false ? total : total + 1, 0) || 1;
|
|
const params = Object.freeze({
|
|
outerWidth: width,
|
|
outerHeight: height,
|
|
padding,
|
|
availableWidth,
|
|
availableHeight,
|
|
vBoxMaxWidth: availableWidth / 2 / visibleVerticalBoxCount,
|
|
hBoxMaxHeight: availableHeight / 2
|
|
});
|
|
const maxPadding = Object.assign({}, padding);
|
|
updateMaxPadding(maxPadding, toPadding(minPadding));
|
|
const chartArea = Object.assign({
|
|
maxPadding,
|
|
w: availableWidth,
|
|
h: availableHeight,
|
|
x: padding.left,
|
|
y: padding.top
|
|
}, padding);
|
|
const stacks = setLayoutDims(verticalBoxes.concat(horizontalBoxes), params);
|
|
fitBoxes(boxes.fullSize, chartArea, params, stacks);
|
|
fitBoxes(verticalBoxes, chartArea, params, stacks);
|
|
if (fitBoxes(horizontalBoxes, chartArea, params, stacks)) {
|
|
fitBoxes(verticalBoxes, chartArea, params, stacks);
|
|
}
|
|
handleMaxPadding(chartArea);
|
|
placeBoxes(boxes.leftAndTop, chartArea, params, stacks);
|
|
chartArea.x += chartArea.w;
|
|
chartArea.y += chartArea.h;
|
|
placeBoxes(boxes.rightAndBottom, chartArea, params, stacks);
|
|
chart.chartArea = {
|
|
left: chartArea.left,
|
|
top: chartArea.top,
|
|
right: chartArea.left + chartArea.w,
|
|
bottom: chartArea.top + chartArea.h,
|
|
height: chartArea.h,
|
|
width: chartArea.w,
|
|
};
|
|
each(boxes.chartArea, (layout) => {
|
|
const box = layout.box;
|
|
Object.assign(box, chart.chartArea);
|
|
box.update(chartArea.w, chartArea.h, {left: 0, top: 0, right: 0, bottom: 0});
|
|
});
|
|
}
|
|
};
|
|
|
|
class BasePlatform {
|
|
acquireContext(canvas, aspectRatio) {}
|
|
releaseContext(context) {
|
|
return false;
|
|
}
|
|
addEventListener(chart, type, listener) {}
|
|
removeEventListener(chart, type, listener) {}
|
|
getDevicePixelRatio() {
|
|
return 1;
|
|
}
|
|
getMaximumSize(element, width, height, aspectRatio) {
|
|
width = Math.max(0, width || element.width);
|
|
height = height || element.height;
|
|
return {
|
|
width,
|
|
height: Math.max(0, aspectRatio ? Math.floor(width / aspectRatio) : height)
|
|
};
|
|
}
|
|
isAttached(canvas) {
|
|
return true;
|
|
}
|
|
updateConfig(config) {
|
|
}
|
|
}
|
|
|
|
class BasicPlatform extends BasePlatform {
|
|
acquireContext(item) {
|
|
return item && item.getContext && item.getContext('2d') || null;
|
|
}
|
|
updateConfig(config) {
|
|
config.options.animation = false;
|
|
}
|
|
}
|
|
|
|
const EXPANDO_KEY = '$chartjs';
|
|
const EVENT_TYPES = {
|
|
touchstart: 'mousedown',
|
|
touchmove: 'mousemove',
|
|
touchend: 'mouseup',
|
|
pointerenter: 'mouseenter',
|
|
pointerdown: 'mousedown',
|
|
pointermove: 'mousemove',
|
|
pointerup: 'mouseup',
|
|
pointerleave: 'mouseout',
|
|
pointerout: 'mouseout'
|
|
};
|
|
const isNullOrEmpty = value => value === null || value === '';
|
|
function initCanvas(canvas, aspectRatio) {
|
|
const style = canvas.style;
|
|
const renderHeight = canvas.getAttribute('height');
|
|
const renderWidth = canvas.getAttribute('width');
|
|
canvas[EXPANDO_KEY] = {
|
|
initial: {
|
|
height: renderHeight,
|
|
width: renderWidth,
|
|
style: {
|
|
display: style.display,
|
|
height: style.height,
|
|
width: style.width
|
|
}
|
|
}
|
|
};
|
|
style.display = style.display || 'block';
|
|
style.boxSizing = style.boxSizing || 'border-box';
|
|
if (isNullOrEmpty(renderWidth)) {
|
|
const displayWidth = readUsedSize(canvas, 'width');
|
|
if (displayWidth !== undefined) {
|
|
canvas.width = displayWidth;
|
|
}
|
|
}
|
|
if (isNullOrEmpty(renderHeight)) {
|
|
if (canvas.style.height === '') {
|
|
canvas.height = canvas.width / (aspectRatio || 2);
|
|
} else {
|
|
const displayHeight = readUsedSize(canvas, 'height');
|
|
if (displayHeight !== undefined) {
|
|
canvas.height = displayHeight;
|
|
}
|
|
}
|
|
}
|
|
return canvas;
|
|
}
|
|
const eventListenerOptions = supportsEventListenerOptions ? {passive: true} : false;
|
|
function addListener(node, type, listener) {
|
|
node.addEventListener(type, listener, eventListenerOptions);
|
|
}
|
|
function removeListener(chart, type, listener) {
|
|
chart.canvas.removeEventListener(type, listener, eventListenerOptions);
|
|
}
|
|
function fromNativeEvent(event, chart) {
|
|
const type = EVENT_TYPES[event.type] || event.type;
|
|
const {x, y} = getRelativePosition(event, chart);
|
|
return {
|
|
type,
|
|
chart,
|
|
native: event,
|
|
x: x !== undefined ? x : null,
|
|
y: y !== undefined ? y : null,
|
|
};
|
|
}
|
|
function nodeListContains(nodeList, canvas) {
|
|
for (const node of nodeList) {
|
|
if (node === canvas || node.contains(canvas)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
function createAttachObserver(chart, type, listener) {
|
|
const canvas = chart.canvas;
|
|
const observer = new MutationObserver(entries => {
|
|
let trigger = false;
|
|
for (const entry of entries) {
|
|
trigger = trigger || nodeListContains(entry.addedNodes, canvas);
|
|
trigger = trigger && !nodeListContains(entry.removedNodes, canvas);
|
|
}
|
|
if (trigger) {
|
|
listener();
|
|
}
|
|
});
|
|
observer.observe(document, {childList: true, subtree: true});
|
|
return observer;
|
|
}
|
|
function createDetachObserver(chart, type, listener) {
|
|
const canvas = chart.canvas;
|
|
const observer = new MutationObserver(entries => {
|
|
let trigger = false;
|
|
for (const entry of entries) {
|
|
trigger = trigger || nodeListContains(entry.removedNodes, canvas);
|
|
trigger = trigger && !nodeListContains(entry.addedNodes, canvas);
|
|
}
|
|
if (trigger) {
|
|
listener();
|
|
}
|
|
});
|
|
observer.observe(document, {childList: true, subtree: true});
|
|
return observer;
|
|
}
|
|
const drpListeningCharts = new Map();
|
|
let oldDevicePixelRatio = 0;
|
|
function onWindowResize() {
|
|
const dpr = window.devicePixelRatio;
|
|
if (dpr === oldDevicePixelRatio) {
|
|
return;
|
|
}
|
|
oldDevicePixelRatio = dpr;
|
|
drpListeningCharts.forEach((resize, chart) => {
|
|
if (chart.currentDevicePixelRatio !== dpr) {
|
|
resize();
|
|
}
|
|
});
|
|
}
|
|
function listenDevicePixelRatioChanges(chart, resize) {
|
|
if (!drpListeningCharts.size) {
|
|
window.addEventListener('resize', onWindowResize);
|
|
}
|
|
drpListeningCharts.set(chart, resize);
|
|
}
|
|
function unlistenDevicePixelRatioChanges(chart) {
|
|
drpListeningCharts.delete(chart);
|
|
if (!drpListeningCharts.size) {
|
|
window.removeEventListener('resize', onWindowResize);
|
|
}
|
|
}
|
|
function createResizeObserver(chart, type, listener) {
|
|
const canvas = chart.canvas;
|
|
const container = canvas && _getParentNode(canvas);
|
|
if (!container) {
|
|
return;
|
|
}
|
|
const resize = throttled((width, height) => {
|
|
const w = container.clientWidth;
|
|
listener(width, height);
|
|
if (w < container.clientWidth) {
|
|
listener();
|
|
}
|
|
}, window);
|
|
const observer = new ResizeObserver(entries => {
|
|
const entry = entries[0];
|
|
const width = entry.contentRect.width;
|
|
const height = entry.contentRect.height;
|
|
if (width === 0 && height === 0) {
|
|
return;
|
|
}
|
|
resize(width, height);
|
|
});
|
|
observer.observe(container);
|
|
listenDevicePixelRatioChanges(chart, resize);
|
|
return observer;
|
|
}
|
|
function releaseObserver(chart, type, observer) {
|
|
if (observer) {
|
|
observer.disconnect();
|
|
}
|
|
if (type === 'resize') {
|
|
unlistenDevicePixelRatioChanges(chart);
|
|
}
|
|
}
|
|
function createProxyAndListen(chart, type, listener) {
|
|
const canvas = chart.canvas;
|
|
const proxy = throttled((event) => {
|
|
if (chart.ctx !== null) {
|
|
listener(fromNativeEvent(event, chart));
|
|
}
|
|
}, chart, (args) => {
|
|
const event = args[0];
|
|
return [event, event.offsetX, event.offsetY];
|
|
});
|
|
addListener(canvas, type, proxy);
|
|
return proxy;
|
|
}
|
|
class DomPlatform extends BasePlatform {
|
|
acquireContext(canvas, aspectRatio) {
|
|
const context = canvas && canvas.getContext && canvas.getContext('2d');
|
|
if (context && context.canvas === canvas) {
|
|
initCanvas(canvas, aspectRatio);
|
|
return context;
|
|
}
|
|
return null;
|
|
}
|
|
releaseContext(context) {
|
|
const canvas = context.canvas;
|
|
if (!canvas[EXPANDO_KEY]) {
|
|
return false;
|
|
}
|
|
const initial = canvas[EXPANDO_KEY].initial;
|
|
['height', 'width'].forEach((prop) => {
|
|
const value = initial[prop];
|
|
if (isNullOrUndef(value)) {
|
|
canvas.removeAttribute(prop);
|
|
} else {
|
|
canvas.setAttribute(prop, value);
|
|
}
|
|
});
|
|
const style = initial.style || {};
|
|
Object.keys(style).forEach((key) => {
|
|
canvas.style[key] = style[key];
|
|
});
|
|
canvas.width = canvas.width;
|
|
delete canvas[EXPANDO_KEY];
|
|
return true;
|
|
}
|
|
addEventListener(chart, type, listener) {
|
|
this.removeEventListener(chart, type);
|
|
const proxies = chart.$proxies || (chart.$proxies = {});
|
|
const handlers = {
|
|
attach: createAttachObserver,
|
|
detach: createDetachObserver,
|
|
resize: createResizeObserver
|
|
};
|
|
const handler = handlers[type] || createProxyAndListen;
|
|
proxies[type] = handler(chart, type, listener);
|
|
}
|
|
removeEventListener(chart, type) {
|
|
const proxies = chart.$proxies || (chart.$proxies = {});
|
|
const proxy = proxies[type];
|
|
if (!proxy) {
|
|
return;
|
|
}
|
|
const handlers = {
|
|
attach: releaseObserver,
|
|
detach: releaseObserver,
|
|
resize: releaseObserver
|
|
};
|
|
const handler = handlers[type] || removeListener;
|
|
handler(chart, type, proxy);
|
|
proxies[type] = undefined;
|
|
}
|
|
getDevicePixelRatio() {
|
|
return window.devicePixelRatio;
|
|
}
|
|
getMaximumSize(canvas, width, height, aspectRatio) {
|
|
return getMaximumSize(canvas, width, height, aspectRatio);
|
|
}
|
|
isAttached(canvas) {
|
|
const container = _getParentNode(canvas);
|
|
return !!(container && container.isConnected);
|
|
}
|
|
}
|
|
|
|
function _detectPlatform(canvas) {
|
|
if (!_isDomSupported() || (typeof OffscreenCanvas !== 'undefined' && canvas instanceof OffscreenCanvas)) {
|
|
return BasicPlatform;
|
|
}
|
|
return DomPlatform;
|
|
}
|
|
|
|
class PluginService {
|
|
constructor() {
|
|
this._init = [];
|
|
}
|
|
notify(chart, hook, args, filter) {
|
|
if (hook === 'beforeInit') {
|
|
this._init = this._createDescriptors(chart, true);
|
|
this._notify(this._init, chart, 'install');
|
|
}
|
|
const descriptors = filter ? this._descriptors(chart).filter(filter) : this._descriptors(chart);
|
|
const result = this._notify(descriptors, chart, hook, args);
|
|
if (hook === 'afterDestroy') {
|
|
this._notify(descriptors, chart, 'stop');
|
|
this._notify(this._init, chart, 'uninstall');
|
|
}
|
|
return result;
|
|
}
|
|
_notify(descriptors, chart, hook, args) {
|
|
args = args || {};
|
|
for (const descriptor of descriptors) {
|
|
const plugin = descriptor.plugin;
|
|
const method = plugin[hook];
|
|
const params = [chart, args, descriptor.options];
|
|
if (callback(method, params, plugin) === false && args.cancelable) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
invalidate() {
|
|
if (!isNullOrUndef(this._cache)) {
|
|
this._oldCache = this._cache;
|
|
this._cache = undefined;
|
|
}
|
|
}
|
|
_descriptors(chart) {
|
|
if (this._cache) {
|
|
return this._cache;
|
|
}
|
|
const descriptors = this._cache = this._createDescriptors(chart);
|
|
this._notifyStateChanges(chart);
|
|
return descriptors;
|
|
}
|
|
_createDescriptors(chart, all) {
|
|
const config = chart && chart.config;
|
|
const options = valueOrDefault(config.options && config.options.plugins, {});
|
|
const plugins = allPlugins(config);
|
|
return options === false && !all ? [] : createDescriptors(chart, plugins, options, all);
|
|
}
|
|
_notifyStateChanges(chart) {
|
|
const previousDescriptors = this._oldCache || [];
|
|
const descriptors = this._cache;
|
|
const diff = (a, b) => a.filter(x => !b.some(y => x.plugin.id === y.plugin.id));
|
|
this._notify(diff(previousDescriptors, descriptors), chart, 'stop');
|
|
this._notify(diff(descriptors, previousDescriptors), chart, 'start');
|
|
}
|
|
}
|
|
function allPlugins(config) {
|
|
const localIds = {};
|
|
const plugins = [];
|
|
const keys = Object.keys(registry.plugins.items);
|
|
for (let i = 0; i < keys.length; i++) {
|
|
plugins.push(registry.getPlugin(keys[i]));
|
|
}
|
|
const local = config.plugins || [];
|
|
for (let i = 0; i < local.length; i++) {
|
|
const plugin = local[i];
|
|
if (plugins.indexOf(plugin) === -1) {
|
|
plugins.push(plugin);
|
|
localIds[plugin.id] = true;
|
|
}
|
|
}
|
|
return {plugins, localIds};
|
|
}
|
|
function getOpts(options, all) {
|
|
if (!all && options === false) {
|
|
return null;
|
|
}
|
|
if (options === true) {
|
|
return {};
|
|
}
|
|
return options;
|
|
}
|
|
function createDescriptors(chart, {plugins, localIds}, options, all) {
|
|
const result = [];
|
|
const context = chart.getContext();
|
|
for (const plugin of plugins) {
|
|
const id = plugin.id;
|
|
const opts = getOpts(options[id], all);
|
|
if (opts === null) {
|
|
continue;
|
|
}
|
|
result.push({
|
|
plugin,
|
|
options: pluginOpts(chart.config, {plugin, local: localIds[id]}, opts, context)
|
|
});
|
|
}
|
|
return result;
|
|
}
|
|
function pluginOpts(config, {plugin, local}, opts, context) {
|
|
const keys = config.pluginScopeKeys(plugin);
|
|
const scopes = config.getOptionScopes(opts, keys);
|
|
if (local && plugin.defaults) {
|
|
scopes.push(plugin.defaults);
|
|
}
|
|
return config.createResolver(scopes, context, [''], {
|
|
scriptable: false,
|
|
indexable: false,
|
|
allKeys: true
|
|
});
|
|
}
|
|
|
|
function getIndexAxis(type, options) {
|
|
const datasetDefaults = defaults.datasets[type] || {};
|
|
const datasetOptions = (options.datasets || {})[type] || {};
|
|
return datasetOptions.indexAxis || options.indexAxis || datasetDefaults.indexAxis || 'x';
|
|
}
|
|
function getAxisFromDefaultScaleID(id, indexAxis) {
|
|
let axis = id;
|
|
if (id === '_index_') {
|
|
axis = indexAxis;
|
|
} else if (id === '_value_') {
|
|
axis = indexAxis === 'x' ? 'y' : 'x';
|
|
}
|
|
return axis;
|
|
}
|
|
function getDefaultScaleIDFromAxis(axis, indexAxis) {
|
|
return axis === indexAxis ? '_index_' : '_value_';
|
|
}
|
|
function axisFromPosition(position) {
|
|
if (position === 'top' || position === 'bottom') {
|
|
return 'x';
|
|
}
|
|
if (position === 'left' || position === 'right') {
|
|
return 'y';
|
|
}
|
|
}
|
|
function determineAxis(id, scaleOptions) {
|
|
if (id === 'x' || id === 'y') {
|
|
return id;
|
|
}
|
|
return scaleOptions.axis || axisFromPosition(scaleOptions.position) || id.charAt(0).toLowerCase();
|
|
}
|
|
function mergeScaleConfig(config, options) {
|
|
const chartDefaults = overrides[config.type] || {scales: {}};
|
|
const configScales = options.scales || {};
|
|
const chartIndexAxis = getIndexAxis(config.type, options);
|
|
const firstIDs = Object.create(null);
|
|
const scales = Object.create(null);
|
|
Object.keys(configScales).forEach(id => {
|
|
const scaleConf = configScales[id];
|
|
if (!isObject(scaleConf)) {
|
|
return console.error(`Invalid scale configuration for scale: ${id}`);
|
|
}
|
|
if (scaleConf._proxy) {
|
|
return console.warn(`Ignoring resolver passed as options for scale: ${id}`);
|
|
}
|
|
const axis = determineAxis(id, scaleConf);
|
|
const defaultId = getDefaultScaleIDFromAxis(axis, chartIndexAxis);
|
|
const defaultScaleOptions = chartDefaults.scales || {};
|
|
firstIDs[axis] = firstIDs[axis] || id;
|
|
scales[id] = mergeIf(Object.create(null), [{axis}, scaleConf, defaultScaleOptions[axis], defaultScaleOptions[defaultId]]);
|
|
});
|
|
config.data.datasets.forEach(dataset => {
|
|
const type = dataset.type || config.type;
|
|
const indexAxis = dataset.indexAxis || getIndexAxis(type, options);
|
|
const datasetDefaults = overrides[type] || {};
|
|
const defaultScaleOptions = datasetDefaults.scales || {};
|
|
Object.keys(defaultScaleOptions).forEach(defaultID => {
|
|
const axis = getAxisFromDefaultScaleID(defaultID, indexAxis);
|
|
const id = dataset[axis + 'AxisID'] || firstIDs[axis] || axis;
|
|
scales[id] = scales[id] || Object.create(null);
|
|
mergeIf(scales[id], [{axis}, configScales[id], defaultScaleOptions[defaultID]]);
|
|
});
|
|
});
|
|
Object.keys(scales).forEach(key => {
|
|
const scale = scales[key];
|
|
mergeIf(scale, [defaults.scales[scale.type], defaults.scale]);
|
|
});
|
|
return scales;
|
|
}
|
|
function initOptions(config) {
|
|
const options = config.options || (config.options = {});
|
|
options.plugins = valueOrDefault(options.plugins, {});
|
|
options.scales = mergeScaleConfig(config, options);
|
|
}
|
|
function initData(data) {
|
|
data = data || {};
|
|
data.datasets = data.datasets || [];
|
|
data.labels = data.labels || [];
|
|
return data;
|
|
}
|
|
function initConfig(config) {
|
|
config = config || {};
|
|
config.data = initData(config.data);
|
|
initOptions(config);
|
|
return config;
|
|
}
|
|
const keyCache = new Map();
|
|
const keysCached = new Set();
|
|
function cachedKeys(cacheKey, generate) {
|
|
let keys = keyCache.get(cacheKey);
|
|
if (!keys) {
|
|
keys = generate();
|
|
keyCache.set(cacheKey, keys);
|
|
keysCached.add(keys);
|
|
}
|
|
return keys;
|
|
}
|
|
const addIfFound = (set, obj, key) => {
|
|
const opts = resolveObjectKey(obj, key);
|
|
if (opts !== undefined) {
|
|
set.add(opts);
|
|
}
|
|
};
|
|
class Config {
|
|
constructor(config) {
|
|
this._config = initConfig(config);
|
|
this._scopeCache = new Map();
|
|
this._resolverCache = new Map();
|
|
}
|
|
get platform() {
|
|
return this._config.platform;
|
|
}
|
|
get type() {
|
|
return this._config.type;
|
|
}
|
|
set type(type) {
|
|
this._config.type = type;
|
|
}
|
|
get data() {
|
|
return this._config.data;
|
|
}
|
|
set data(data) {
|
|
this._config.data = initData(data);
|
|
}
|
|
get options() {
|
|
return this._config.options;
|
|
}
|
|
set options(options) {
|
|
this._config.options = options;
|
|
}
|
|
get plugins() {
|
|
return this._config.plugins;
|
|
}
|
|
update() {
|
|
const config = this._config;
|
|
this.clearCache();
|
|
initOptions(config);
|
|
}
|
|
clearCache() {
|
|
this._scopeCache.clear();
|
|
this._resolverCache.clear();
|
|
}
|
|
datasetScopeKeys(datasetType) {
|
|
return cachedKeys(datasetType,
|
|
() => [[
|
|
`datasets.${datasetType}`,
|
|
''
|
|
]]);
|
|
}
|
|
datasetAnimationScopeKeys(datasetType, transition) {
|
|
return cachedKeys(`${datasetType}.transition.${transition}`,
|
|
() => [
|
|
[
|
|
`datasets.${datasetType}.transitions.${transition}`,
|
|
`transitions.${transition}`,
|
|
],
|
|
[
|
|
`datasets.${datasetType}`,
|
|
''
|
|
]
|
|
]);
|
|
}
|
|
datasetElementScopeKeys(datasetType, elementType) {
|
|
return cachedKeys(`${datasetType}-${elementType}`,
|
|
() => [[
|
|
`datasets.${datasetType}.elements.${elementType}`,
|
|
`datasets.${datasetType}`,
|
|
`elements.${elementType}`,
|
|
''
|
|
]]);
|
|
}
|
|
pluginScopeKeys(plugin) {
|
|
const id = plugin.id;
|
|
const type = this.type;
|
|
return cachedKeys(`${type}-plugin-${id}`,
|
|
() => [[
|
|
`plugins.${id}`,
|
|
...plugin.additionalOptionScopes || [],
|
|
]]);
|
|
}
|
|
_cachedScopes(mainScope, resetCache) {
|
|
const _scopeCache = this._scopeCache;
|
|
let cache = _scopeCache.get(mainScope);
|
|
if (!cache || resetCache) {
|
|
cache = new Map();
|
|
_scopeCache.set(mainScope, cache);
|
|
}
|
|
return cache;
|
|
}
|
|
getOptionScopes(mainScope, keyLists, resetCache) {
|
|
const {options, type} = this;
|
|
const cache = this._cachedScopes(mainScope, resetCache);
|
|
const cached = cache.get(keyLists);
|
|
if (cached) {
|
|
return cached;
|
|
}
|
|
const scopes = new Set();
|
|
keyLists.forEach(keys => {
|
|
if (mainScope) {
|
|
scopes.add(mainScope);
|
|
keys.forEach(key => addIfFound(scopes, mainScope, key));
|
|
}
|
|
keys.forEach(key => addIfFound(scopes, options, key));
|
|
keys.forEach(key => addIfFound(scopes, overrides[type] || {}, key));
|
|
keys.forEach(key => addIfFound(scopes, defaults, key));
|
|
keys.forEach(key => addIfFound(scopes, descriptors, key));
|
|
});
|
|
const array = Array.from(scopes);
|
|
if (array.length === 0) {
|
|
array.push(Object.create(null));
|
|
}
|
|
if (keysCached.has(keyLists)) {
|
|
cache.set(keyLists, array);
|
|
}
|
|
return array;
|
|
}
|
|
chartOptionScopes() {
|
|
const {options, type} = this;
|
|
return [
|
|
options,
|
|
overrides[type] || {},
|
|
defaults.datasets[type] || {},
|
|
{type},
|
|
defaults,
|
|
descriptors
|
|
];
|
|
}
|
|
resolveNamedOptions(scopes, names, context, prefixes = ['']) {
|
|
const result = {$shared: true};
|
|
const {resolver, subPrefixes} = getResolver(this._resolverCache, scopes, prefixes);
|
|
let options = resolver;
|
|
if (needContext(resolver, names)) {
|
|
result.$shared = false;
|
|
context = isFunction(context) ? context() : context;
|
|
const subResolver = this.createResolver(scopes, context, subPrefixes);
|
|
options = _attachContext(resolver, context, subResolver);
|
|
}
|
|
for (const prop of names) {
|
|
result[prop] = options[prop];
|
|
}
|
|
return result;
|
|
}
|
|
createResolver(scopes, context, prefixes = [''], descriptorDefaults) {
|
|
const {resolver} = getResolver(this._resolverCache, scopes, prefixes);
|
|
return isObject(context)
|
|
? _attachContext(resolver, context, undefined, descriptorDefaults)
|
|
: resolver;
|
|
}
|
|
}
|
|
function getResolver(resolverCache, scopes, prefixes) {
|
|
let cache = resolverCache.get(scopes);
|
|
if (!cache) {
|
|
cache = new Map();
|
|
resolverCache.set(scopes, cache);
|
|
}
|
|
const cacheKey = prefixes.join();
|
|
let cached = cache.get(cacheKey);
|
|
if (!cached) {
|
|
const resolver = _createResolver(scopes, prefixes);
|
|
cached = {
|
|
resolver,
|
|
subPrefixes: prefixes.filter(p => !p.toLowerCase().includes('hover'))
|
|
};
|
|
cache.set(cacheKey, cached);
|
|
}
|
|
return cached;
|
|
}
|
|
const hasFunction = value => isObject(value)
|
|
&& Object.getOwnPropertyNames(value).reduce((acc, key) => acc || isFunction(value[key]), false);
|
|
function needContext(proxy, names) {
|
|
const {isScriptable, isIndexable} = _descriptors(proxy);
|
|
for (const prop of names) {
|
|
const scriptable = isScriptable(prop);
|
|
const indexable = isIndexable(prop);
|
|
const value = (indexable || scriptable) && proxy[prop];
|
|
if ((scriptable && (isFunction(value) || hasFunction(value)))
|
|
|| (indexable && isArray(value))) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
var version = "3.9.1";
|
|
|
|
const KNOWN_POSITIONS = ['top', 'bottom', 'left', 'right', 'chartArea'];
|
|
function positionIsHorizontal(position, axis) {
|
|
return position === 'top' || position === 'bottom' || (KNOWN_POSITIONS.indexOf(position) === -1 && axis === 'x');
|
|
}
|
|
function compare2Level(l1, l2) {
|
|
return function(a, b) {
|
|
return a[l1] === b[l1]
|
|
? a[l2] - b[l2]
|
|
: a[l1] - b[l1];
|
|
};
|
|
}
|
|
function onAnimationsComplete(context) {
|
|
const chart = context.chart;
|
|
const animationOptions = chart.options.animation;
|
|
chart.notifyPlugins('afterRender');
|
|
callback(animationOptions && animationOptions.onComplete, [context], chart);
|
|
}
|
|
function onAnimationProgress(context) {
|
|
const chart = context.chart;
|
|
const animationOptions = chart.options.animation;
|
|
callback(animationOptions && animationOptions.onProgress, [context], chart);
|
|
}
|
|
function getCanvas(item) {
|
|
if (_isDomSupported() && typeof item === 'string') {
|
|
item = document.getElementById(item);
|
|
} else if (item && item.length) {
|
|
item = item[0];
|
|
}
|
|
if (item && item.canvas) {
|
|
item = item.canvas;
|
|
}
|
|
return item;
|
|
}
|
|
const instances = {};
|
|
const getChart = (key) => {
|
|
const canvas = getCanvas(key);
|
|
return Object.values(instances).filter((c) => c.canvas === canvas).pop();
|
|
};
|
|
function moveNumericKeys(obj, start, move) {
|
|
const keys = Object.keys(obj);
|
|
for (const key of keys) {
|
|
const intKey = +key;
|
|
if (intKey >= start) {
|
|
const value = obj[key];
|
|
delete obj[key];
|
|
if (move > 0 || intKey > start) {
|
|
obj[intKey + move] = value;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
function determineLastEvent(e, lastEvent, inChartArea, isClick) {
|
|
if (!inChartArea || e.type === 'mouseout') {
|
|
return null;
|
|
}
|
|
if (isClick) {
|
|
return lastEvent;
|
|
}
|
|
return e;
|
|
}
|
|
class Chart {
|
|
constructor(item, userConfig) {
|
|
const config = this.config = new Config(userConfig);
|
|
const initialCanvas = getCanvas(item);
|
|
const existingChart = getChart(initialCanvas);
|
|
if (existingChart) {
|
|
throw new Error(
|
|
'Canvas is already in use. Chart with ID \'' + existingChart.id + '\'' +
|
|
' must be destroyed before the canvas with ID \'' + existingChart.canvas.id + '\' can be reused.'
|
|
);
|
|
}
|
|
const options = config.createResolver(config.chartOptionScopes(), this.getContext());
|
|
this.platform = new (config.platform || _detectPlatform(initialCanvas))();
|
|
this.platform.updateConfig(config);
|
|
const context = this.platform.acquireContext(initialCanvas, options.aspectRatio);
|
|
const canvas = context && context.canvas;
|
|
const height = canvas && canvas.height;
|
|
const width = canvas && canvas.width;
|
|
this.id = uid();
|
|
this.ctx = context;
|
|
this.canvas = canvas;
|
|
this.width = width;
|
|
this.height = height;
|
|
this._options = options;
|
|
this._aspectRatio = this.aspectRatio;
|
|
this._layers = [];
|
|
this._metasets = [];
|
|
this._stacks = undefined;
|
|
this.boxes = [];
|
|
this.currentDevicePixelRatio = undefined;
|
|
this.chartArea = undefined;
|
|
this._active = [];
|
|
this._lastEvent = undefined;
|
|
this._listeners = {};
|
|
this._responsiveListeners = undefined;
|
|
this._sortedMetasets = [];
|
|
this.scales = {};
|
|
this._plugins = new PluginService();
|
|
this.$proxies = {};
|
|
this._hiddenIndices = {};
|
|
this.attached = false;
|
|
this._animationsDisabled = undefined;
|
|
this.$context = undefined;
|
|
this._doResize = debounce(mode => this.update(mode), options.resizeDelay || 0);
|
|
this._dataChanges = [];
|
|
instances[this.id] = this;
|
|
if (!context || !canvas) {
|
|
console.error("Failed to create chart: can't acquire context from the given item");
|
|
return;
|
|
}
|
|
animator.listen(this, 'complete', onAnimationsComplete);
|
|
animator.listen(this, 'progress', onAnimationProgress);
|
|
this._initialize();
|
|
if (this.attached) {
|
|
this.update();
|
|
}
|
|
}
|
|
get aspectRatio() {
|
|
const {options: {aspectRatio, maintainAspectRatio}, width, height, _aspectRatio} = this;
|
|
if (!isNullOrUndef(aspectRatio)) {
|
|
return aspectRatio;
|
|
}
|
|
if (maintainAspectRatio && _aspectRatio) {
|
|
return _aspectRatio;
|
|
}
|
|
return height ? width / height : null;
|
|
}
|
|
get data() {
|
|
return this.config.data;
|
|
}
|
|
set data(data) {
|
|
this.config.data = data;
|
|
}
|
|
get options() {
|
|
return this._options;
|
|
}
|
|
set options(options) {
|
|
this.config.options = options;
|
|
}
|
|
_initialize() {
|
|
this.notifyPlugins('beforeInit');
|
|
if (this.options.responsive) {
|
|
this.resize();
|
|
} else {
|
|
retinaScale(this, this.options.devicePixelRatio);
|
|
}
|
|
this.bindEvents();
|
|
this.notifyPlugins('afterInit');
|
|
return this;
|
|
}
|
|
clear() {
|
|
clearCanvas(this.canvas, this.ctx);
|
|
return this;
|
|
}
|
|
stop() {
|
|
animator.stop(this);
|
|
return this;
|
|
}
|
|
resize(width, height) {
|
|
if (!animator.running(this)) {
|
|
this._resize(width, height);
|
|
} else {
|
|
this._resizeBeforeDraw = {width, height};
|
|
}
|
|
}
|
|
_resize(width, height) {
|
|
const options = this.options;
|
|
const canvas = this.canvas;
|
|
const aspectRatio = options.maintainAspectRatio && this.aspectRatio;
|
|
const newSize = this.platform.getMaximumSize(canvas, width, height, aspectRatio);
|
|
const newRatio = options.devicePixelRatio || this.platform.getDevicePixelRatio();
|
|
const mode = this.width ? 'resize' : 'attach';
|
|
this.width = newSize.width;
|
|
this.height = newSize.height;
|
|
this._aspectRatio = this.aspectRatio;
|
|
if (!retinaScale(this, newRatio, true)) {
|
|
return;
|
|
}
|
|
this.notifyPlugins('resize', {size: newSize});
|
|
callback(options.onResize, [this, newSize], this);
|
|
if (this.attached) {
|
|
if (this._doResize(mode)) {
|
|
this.render();
|
|
}
|
|
}
|
|
}
|
|
ensureScalesHaveIDs() {
|
|
const options = this.options;
|
|
const scalesOptions = options.scales || {};
|
|
each(scalesOptions, (axisOptions, axisID) => {
|
|
axisOptions.id = axisID;
|
|
});
|
|
}
|
|
buildOrUpdateScales() {
|
|
const options = this.options;
|
|
const scaleOpts = options.scales;
|
|
const scales = this.scales;
|
|
const updated = Object.keys(scales).reduce((obj, id) => {
|
|
obj[id] = false;
|
|
return obj;
|
|
}, {});
|
|
let items = [];
|
|
if (scaleOpts) {
|
|
items = items.concat(
|
|
Object.keys(scaleOpts).map((id) => {
|
|
const scaleOptions = scaleOpts[id];
|
|
const axis = determineAxis(id, scaleOptions);
|
|
const isRadial = axis === 'r';
|
|
const isHorizontal = axis === 'x';
|
|
return {
|
|
options: scaleOptions,
|
|
dposition: isRadial ? 'chartArea' : isHorizontal ? 'bottom' : 'left',
|
|
dtype: isRadial ? 'radialLinear' : isHorizontal ? 'category' : 'linear'
|
|
};
|
|
})
|
|
);
|
|
}
|
|
each(items, (item) => {
|
|
const scaleOptions = item.options;
|
|
const id = scaleOptions.id;
|
|
const axis = determineAxis(id, scaleOptions);
|
|
const scaleType = valueOrDefault(scaleOptions.type, item.dtype);
|
|
if (scaleOptions.position === undefined || positionIsHorizontal(scaleOptions.position, axis) !== positionIsHorizontal(item.dposition)) {
|
|
scaleOptions.position = item.dposition;
|
|
}
|
|
updated[id] = true;
|
|
let scale = null;
|
|
if (id in scales && scales[id].type === scaleType) {
|
|
scale = scales[id];
|
|
} else {
|
|
const scaleClass = registry.getScale(scaleType);
|
|
scale = new scaleClass({
|
|
id,
|
|
type: scaleType,
|
|
ctx: this.ctx,
|
|
chart: this
|
|
});
|
|
scales[scale.id] = scale;
|
|
}
|
|
scale.init(scaleOptions, options);
|
|
});
|
|
each(updated, (hasUpdated, id) => {
|
|
if (!hasUpdated) {
|
|
delete scales[id];
|
|
}
|
|
});
|
|
each(scales, (scale) => {
|
|
layouts.configure(this, scale, scale.options);
|
|
layouts.addBox(this, scale);
|
|
});
|
|
}
|
|
_updateMetasets() {
|
|
const metasets = this._metasets;
|
|
const numData = this.data.datasets.length;
|
|
const numMeta = metasets.length;
|
|
metasets.sort((a, b) => a.index - b.index);
|
|
if (numMeta > numData) {
|
|
for (let i = numData; i < numMeta; ++i) {
|
|
this._destroyDatasetMeta(i);
|
|
}
|
|
metasets.splice(numData, numMeta - numData);
|
|
}
|
|
this._sortedMetasets = metasets.slice(0).sort(compare2Level('order', 'index'));
|
|
}
|
|
_removeUnreferencedMetasets() {
|
|
const {_metasets: metasets, data: {datasets}} = this;
|
|
if (metasets.length > datasets.length) {
|
|
delete this._stacks;
|
|
}
|
|
metasets.forEach((meta, index) => {
|
|
if (datasets.filter(x => x === meta._dataset).length === 0) {
|
|
this._destroyDatasetMeta(index);
|
|
}
|
|
});
|
|
}
|
|
buildOrUpdateControllers() {
|
|
const newControllers = [];
|
|
const datasets = this.data.datasets;
|
|
let i, ilen;
|
|
this._removeUnreferencedMetasets();
|
|
for (i = 0, ilen = datasets.length; i < ilen; i++) {
|
|
const dataset = datasets[i];
|
|
let meta = this.getDatasetMeta(i);
|
|
const type = dataset.type || this.config.type;
|
|
if (meta.type && meta.type !== type) {
|
|
this._destroyDatasetMeta(i);
|
|
meta = this.getDatasetMeta(i);
|
|
}
|
|
meta.type = type;
|
|
meta.indexAxis = dataset.indexAxis || getIndexAxis(type, this.options);
|
|
meta.order = dataset.order || 0;
|
|
meta.index = i;
|
|
meta.label = '' + dataset.label;
|
|
meta.visible = this.isDatasetVisible(i);
|
|
if (meta.controller) {
|
|
meta.controller.updateIndex(i);
|
|
meta.controller.linkScales();
|
|
} else {
|
|
const ControllerClass = registry.getController(type);
|
|
const {datasetElementType, dataElementType} = defaults.datasets[type];
|
|
Object.assign(ControllerClass.prototype, {
|
|
dataElementType: registry.getElement(dataElementType),
|
|
datasetElementType: datasetElementType && registry.getElement(datasetElementType)
|
|
});
|
|
meta.controller = new ControllerClass(this, i);
|
|
newControllers.push(meta.controller);
|
|
}
|
|
}
|
|
this._updateMetasets();
|
|
return newControllers;
|
|
}
|
|
_resetElements() {
|
|
each(this.data.datasets, (dataset, datasetIndex) => {
|
|
this.getDatasetMeta(datasetIndex).controller.reset();
|
|
}, this);
|
|
}
|
|
reset() {
|
|
this._resetElements();
|
|
this.notifyPlugins('reset');
|
|
}
|
|
update(mode) {
|
|
const config = this.config;
|
|
config.update();
|
|
const options = this._options = config.createResolver(config.chartOptionScopes(), this.getContext());
|
|
const animsDisabled = this._animationsDisabled = !options.animation;
|
|
this._updateScales();
|
|
this._checkEventBindings();
|
|
this._updateHiddenIndices();
|
|
this._plugins.invalidate();
|
|
if (this.notifyPlugins('beforeUpdate', {mode, cancelable: true}) === false) {
|
|
return;
|
|
}
|
|
const newControllers = this.buildOrUpdateControllers();
|
|
this.notifyPlugins('beforeElementsUpdate');
|
|
let minPadding = 0;
|
|
for (let i = 0, ilen = this.data.datasets.length; i < ilen; i++) {
|
|
const {controller} = this.getDatasetMeta(i);
|
|
const reset = !animsDisabled && newControllers.indexOf(controller) === -1;
|
|
controller.buildOrUpdateElements(reset);
|
|
minPadding = Math.max(+controller.getMaxOverflow(), minPadding);
|
|
}
|
|
minPadding = this._minPadding = options.layout.autoPadding ? minPadding : 0;
|
|
this._updateLayout(minPadding);
|
|
if (!animsDisabled) {
|
|
each(newControllers, (controller) => {
|
|
controller.reset();
|
|
});
|
|
}
|
|
this._updateDatasets(mode);
|
|
this.notifyPlugins('afterUpdate', {mode});
|
|
this._layers.sort(compare2Level('z', '_idx'));
|
|
const {_active, _lastEvent} = this;
|
|
if (_lastEvent) {
|
|
this._eventHandler(_lastEvent, true);
|
|
} else if (_active.length) {
|
|
this._updateHoverStyles(_active, _active, true);
|
|
}
|
|
this.render();
|
|
}
|
|
_updateScales() {
|
|
each(this.scales, (scale) => {
|
|
layouts.removeBox(this, scale);
|
|
});
|
|
this.ensureScalesHaveIDs();
|
|
this.buildOrUpdateScales();
|
|
}
|
|
_checkEventBindings() {
|
|
const options = this.options;
|
|
const existingEvents = new Set(Object.keys(this._listeners));
|
|
const newEvents = new Set(options.events);
|
|
if (!setsEqual(existingEvents, newEvents) || !!this._responsiveListeners !== options.responsive) {
|
|
this.unbindEvents();
|
|
this.bindEvents();
|
|
}
|
|
}
|
|
_updateHiddenIndices() {
|
|
const {_hiddenIndices} = this;
|
|
const changes = this._getUniformDataChanges() || [];
|
|
for (const {method, start, count} of changes) {
|
|
const move = method === '_removeElements' ? -count : count;
|
|
moveNumericKeys(_hiddenIndices, start, move);
|
|
}
|
|
}
|
|
_getUniformDataChanges() {
|
|
const _dataChanges = this._dataChanges;
|
|
if (!_dataChanges || !_dataChanges.length) {
|
|
return;
|
|
}
|
|
this._dataChanges = [];
|
|
const datasetCount = this.data.datasets.length;
|
|
const makeSet = (idx) => new Set(
|
|
_dataChanges
|
|
.filter(c => c[0] === idx)
|
|
.map((c, i) => i + ',' + c.splice(1).join(','))
|
|
);
|
|
const changeSet = makeSet(0);
|
|
for (let i = 1; i < datasetCount; i++) {
|
|
if (!setsEqual(changeSet, makeSet(i))) {
|
|
return;
|
|
}
|
|
}
|
|
return Array.from(changeSet)
|
|
.map(c => c.split(','))
|
|
.map(a => ({method: a[1], start: +a[2], count: +a[3]}));
|
|
}
|
|
_updateLayout(minPadding) {
|
|
if (this.notifyPlugins('beforeLayout', {cancelable: true}) === false) {
|
|
return;
|
|
}
|
|
layouts.update(this, this.width, this.height, minPadding);
|
|
const area = this.chartArea;
|
|
const noArea = area.width <= 0 || area.height <= 0;
|
|
this._layers = [];
|
|
each(this.boxes, (box) => {
|
|
if (noArea && box.position === 'chartArea') {
|
|
return;
|
|
}
|
|
if (box.configure) {
|
|
box.configure();
|
|
}
|
|
this._layers.push(...box._layers());
|
|
}, this);
|
|
this._layers.forEach((item, index) => {
|
|
item._idx = index;
|
|
});
|
|
this.notifyPlugins('afterLayout');
|
|
}
|
|
_updateDatasets(mode) {
|
|
if (this.notifyPlugins('beforeDatasetsUpdate', {mode, cancelable: true}) === false) {
|
|
return;
|
|
}
|
|
for (let i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {
|
|
this.getDatasetMeta(i).controller.configure();
|
|
}
|
|
for (let i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {
|
|
this._updateDataset(i, isFunction(mode) ? mode({datasetIndex: i}) : mode);
|
|
}
|
|
this.notifyPlugins('afterDatasetsUpdate', {mode});
|
|
}
|
|
_updateDataset(index, mode) {
|
|
const meta = this.getDatasetMeta(index);
|
|
const args = {meta, index, mode, cancelable: true};
|
|
if (this.notifyPlugins('beforeDatasetUpdate', args) === false) {
|
|
return;
|
|
}
|
|
meta.controller._update(mode);
|
|
args.cancelable = false;
|
|
this.notifyPlugins('afterDatasetUpdate', args);
|
|
}
|
|
render() {
|
|
if (this.notifyPlugins('beforeRender', {cancelable: true}) === false) {
|
|
return;
|
|
}
|
|
if (animator.has(this)) {
|
|
if (this.attached && !animator.running(this)) {
|
|
animator.start(this);
|
|
}
|
|
} else {
|
|
this.draw();
|
|
onAnimationsComplete({chart: this});
|
|
}
|
|
}
|
|
draw() {
|
|
let i;
|
|
if (this._resizeBeforeDraw) {
|
|
const {width, height} = this._resizeBeforeDraw;
|
|
this._resize(width, height);
|
|
this._resizeBeforeDraw = null;
|
|
}
|
|
this.clear();
|
|
if (this.width <= 0 || this.height <= 0) {
|
|
return;
|
|
}
|
|
if (this.notifyPlugins('beforeDraw', {cancelable: true}) === false) {
|
|
return;
|
|
}
|
|
const layers = this._layers;
|
|
for (i = 0; i < layers.length && layers[i].z <= 0; ++i) {
|
|
layers[i].draw(this.chartArea);
|
|
}
|
|
this._drawDatasets();
|
|
for (; i < layers.length; ++i) {
|
|
layers[i].draw(this.chartArea);
|
|
}
|
|
this.notifyPlugins('afterDraw');
|
|
}
|
|
_getSortedDatasetMetas(filterVisible) {
|
|
const metasets = this._sortedMetasets;
|
|
const result = [];
|
|
let i, ilen;
|
|
for (i = 0, ilen = metasets.length; i < ilen; ++i) {
|
|
const meta = metasets[i];
|
|
if (!filterVisible || meta.visible) {
|
|
result.push(meta);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
getSortedVisibleDatasetMetas() {
|
|
return this._getSortedDatasetMetas(true);
|
|
}
|
|
_drawDatasets() {
|
|
if (this.notifyPlugins('beforeDatasetsDraw', {cancelable: true}) === false) {
|
|
return;
|
|
}
|
|
const metasets = this.getSortedVisibleDatasetMetas();
|
|
for (let i = metasets.length - 1; i >= 0; --i) {
|
|
this._drawDataset(metasets[i]);
|
|
}
|
|
this.notifyPlugins('afterDatasetsDraw');
|
|
}
|
|
_drawDataset(meta) {
|
|
const ctx = this.ctx;
|
|
const clip = meta._clip;
|
|
const useClip = !clip.disabled;
|
|
const area = this.chartArea;
|
|
const args = {
|
|
meta,
|
|
index: meta.index,
|
|
cancelable: true
|
|
};
|
|
if (this.notifyPlugins('beforeDatasetDraw', args) === false) {
|
|
return;
|
|
}
|
|
if (useClip) {
|
|
clipArea(ctx, {
|
|
left: clip.left === false ? 0 : area.left - clip.left,
|
|
right: clip.right === false ? this.width : area.right + clip.right,
|
|
top: clip.top === false ? 0 : area.top - clip.top,
|
|
bottom: clip.bottom === false ? this.height : area.bottom + clip.bottom
|
|
});
|
|
}
|
|
meta.controller.draw();
|
|
if (useClip) {
|
|
unclipArea(ctx);
|
|
}
|
|
args.cancelable = false;
|
|
this.notifyPlugins('afterDatasetDraw', args);
|
|
}
|
|
isPointInArea(point) {
|
|
return _isPointInArea(point, this.chartArea, this._minPadding);
|
|
}
|
|
getElementsAtEventForMode(e, mode, options, useFinalPosition) {
|
|
const method = Interaction.modes[mode];
|
|
if (typeof method === 'function') {
|
|
return method(this, e, options, useFinalPosition);
|
|
}
|
|
return [];
|
|
}
|
|
getDatasetMeta(datasetIndex) {
|
|
const dataset = this.data.datasets[datasetIndex];
|
|
const metasets = this._metasets;
|
|
let meta = metasets.filter(x => x && x._dataset === dataset).pop();
|
|
if (!meta) {
|
|
meta = {
|
|
type: null,
|
|
data: [],
|
|
dataset: null,
|
|
controller: null,
|
|
hidden: null,
|
|
xAxisID: null,
|
|
yAxisID: null,
|
|
order: dataset && dataset.order || 0,
|
|
index: datasetIndex,
|
|
_dataset: dataset,
|
|
_parsed: [],
|
|
_sorted: false
|
|
};
|
|
metasets.push(meta);
|
|
}
|
|
return meta;
|
|
}
|
|
getContext() {
|
|
return this.$context || (this.$context = createContext(null, {chart: this, type: 'chart'}));
|
|
}
|
|
getVisibleDatasetCount() {
|
|
return this.getSortedVisibleDatasetMetas().length;
|
|
}
|
|
isDatasetVisible(datasetIndex) {
|
|
const dataset = this.data.datasets[datasetIndex];
|
|
if (!dataset) {
|
|
return false;
|
|
}
|
|
const meta = this.getDatasetMeta(datasetIndex);
|
|
return typeof meta.hidden === 'boolean' ? !meta.hidden : !dataset.hidden;
|
|
}
|
|
setDatasetVisibility(datasetIndex, visible) {
|
|
const meta = this.getDatasetMeta(datasetIndex);
|
|
meta.hidden = !visible;
|
|
}
|
|
toggleDataVisibility(index) {
|
|
this._hiddenIndices[index] = !this._hiddenIndices[index];
|
|
}
|
|
getDataVisibility(index) {
|
|
return !this._hiddenIndices[index];
|
|
}
|
|
_updateVisibility(datasetIndex, dataIndex, visible) {
|
|
const mode = visible ? 'show' : 'hide';
|
|
const meta = this.getDatasetMeta(datasetIndex);
|
|
const anims = meta.controller._resolveAnimations(undefined, mode);
|
|
if (defined(dataIndex)) {
|
|
meta.data[dataIndex].hidden = !visible;
|
|
this.update();
|
|
} else {
|
|
this.setDatasetVisibility(datasetIndex, visible);
|
|
anims.update(meta, {visible});
|
|
this.update((ctx) => ctx.datasetIndex === datasetIndex ? mode : undefined);
|
|
}
|
|
}
|
|
hide(datasetIndex, dataIndex) {
|
|
this._updateVisibility(datasetIndex, dataIndex, false);
|
|
}
|
|
show(datasetIndex, dataIndex) {
|
|
this._updateVisibility(datasetIndex, dataIndex, true);
|
|
}
|
|
_destroyDatasetMeta(datasetIndex) {
|
|
const meta = this._metasets[datasetIndex];
|
|
if (meta && meta.controller) {
|
|
meta.controller._destroy();
|
|
}
|
|
delete this._metasets[datasetIndex];
|
|
}
|
|
_stop() {
|
|
let i, ilen;
|
|
this.stop();
|
|
animator.remove(this);
|
|
for (i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {
|
|
this._destroyDatasetMeta(i);
|
|
}
|
|
}
|
|
destroy() {
|
|
this.notifyPlugins('beforeDestroy');
|
|
const {canvas, ctx} = this;
|
|
this._stop();
|
|
this.config.clearCache();
|
|
if (canvas) {
|
|
this.unbindEvents();
|
|
clearCanvas(canvas, ctx);
|
|
this.platform.releaseContext(ctx);
|
|
this.canvas = null;
|
|
this.ctx = null;
|
|
}
|
|
this.notifyPlugins('destroy');
|
|
delete instances[this.id];
|
|
this.notifyPlugins('afterDestroy');
|
|
}
|
|
toBase64Image(...args) {
|
|
return this.canvas.toDataURL(...args);
|
|
}
|
|
bindEvents() {
|
|
this.bindUserEvents();
|
|
if (this.options.responsive) {
|
|
this.bindResponsiveEvents();
|
|
} else {
|
|
this.attached = true;
|
|
}
|
|
}
|
|
bindUserEvents() {
|
|
const listeners = this._listeners;
|
|
const platform = this.platform;
|
|
const _add = (type, listener) => {
|
|
platform.addEventListener(this, type, listener);
|
|
listeners[type] = listener;
|
|
};
|
|
const listener = (e, x, y) => {
|
|
e.offsetX = x;
|
|
e.offsetY = y;
|
|
this._eventHandler(e);
|
|
};
|
|
each(this.options.events, (type) => _add(type, listener));
|
|
}
|
|
bindResponsiveEvents() {
|
|
if (!this._responsiveListeners) {
|
|
this._responsiveListeners = {};
|
|
}
|
|
const listeners = this._responsiveListeners;
|
|
const platform = this.platform;
|
|
const _add = (type, listener) => {
|
|
platform.addEventListener(this, type, listener);
|
|
listeners[type] = listener;
|
|
};
|
|
const _remove = (type, listener) => {
|
|
if (listeners[type]) {
|
|
platform.removeEventListener(this, type, listener);
|
|
delete listeners[type];
|
|
}
|
|
};
|
|
const listener = (width, height) => {
|
|
if (this.canvas) {
|
|
this.resize(width, height);
|
|
}
|
|
};
|
|
let detached;
|
|
const attached = () => {
|
|
_remove('attach', attached);
|
|
this.attached = true;
|
|
this.resize();
|
|
_add('resize', listener);
|
|
_add('detach', detached);
|
|
};
|
|
detached = () => {
|
|
this.attached = false;
|
|
_remove('resize', listener);
|
|
this._stop();
|
|
this._resize(0, 0);
|
|
_add('attach', attached);
|
|
};
|
|
if (platform.isAttached(this.canvas)) {
|
|
attached();
|
|
} else {
|
|
detached();
|
|
}
|
|
}
|
|
unbindEvents() {
|
|
each(this._listeners, (listener, type) => {
|
|
this.platform.removeEventListener(this, type, listener);
|
|
});
|
|
this._listeners = {};
|
|
each(this._responsiveListeners, (listener, type) => {
|
|
this.platform.removeEventListener(this, type, listener);
|
|
});
|
|
this._responsiveListeners = undefined;
|
|
}
|
|
updateHoverStyle(items, mode, enabled) {
|
|
const prefix = enabled ? 'set' : 'remove';
|
|
let meta, item, i, ilen;
|
|
if (mode === 'dataset') {
|
|
meta = this.getDatasetMeta(items[0].datasetIndex);
|
|
meta.controller['_' + prefix + 'DatasetHoverStyle']();
|
|
}
|
|
for (i = 0, ilen = items.length; i < ilen; ++i) {
|
|
item = items[i];
|
|
const controller = item && this.getDatasetMeta(item.datasetIndex).controller;
|
|
if (controller) {
|
|
controller[prefix + 'HoverStyle'](item.element, item.datasetIndex, item.index);
|
|
}
|
|
}
|
|
}
|
|
getActiveElements() {
|
|
return this._active || [];
|
|
}
|
|
setActiveElements(activeElements) {
|
|
const lastActive = this._active || [];
|
|
const active = activeElements.map(({datasetIndex, index}) => {
|
|
const meta = this.getDatasetMeta(datasetIndex);
|
|
if (!meta) {
|
|
throw new Error('No dataset found at index ' + datasetIndex);
|
|
}
|
|
return {
|
|
datasetIndex,
|
|
element: meta.data[index],
|
|
index,
|
|
};
|
|
});
|
|
const changed = !_elementsEqual(active, lastActive);
|
|
if (changed) {
|
|
this._active = active;
|
|
this._lastEvent = null;
|
|
this._updateHoverStyles(active, lastActive);
|
|
}
|
|
}
|
|
notifyPlugins(hook, args, filter) {
|
|
return this._plugins.notify(this, hook, args, filter);
|
|
}
|
|
_updateHoverStyles(active, lastActive, replay) {
|
|
const hoverOptions = this.options.hover;
|
|
const diff = (a, b) => a.filter(x => !b.some(y => x.datasetIndex === y.datasetIndex && x.index === y.index));
|
|
const deactivated = diff(lastActive, active);
|
|
const activated = replay ? active : diff(active, lastActive);
|
|
if (deactivated.length) {
|
|
this.updateHoverStyle(deactivated, hoverOptions.mode, false);
|
|
}
|
|
if (activated.length && hoverOptions.mode) {
|
|
this.updateHoverStyle(activated, hoverOptions.mode, true);
|
|
}
|
|
}
|
|
_eventHandler(e, replay) {
|
|
const args = {
|
|
event: e,
|
|
replay,
|
|
cancelable: true,
|
|
inChartArea: this.isPointInArea(e)
|
|
};
|
|
const eventFilter = (plugin) => (plugin.options.events || this.options.events).includes(e.native.type);
|
|
if (this.notifyPlugins('beforeEvent', args, eventFilter) === false) {
|
|
return;
|
|
}
|
|
const changed = this._handleEvent(e, replay, args.inChartArea);
|
|
args.cancelable = false;
|
|
this.notifyPlugins('afterEvent', args, eventFilter);
|
|
if (changed || args.changed) {
|
|
this.render();
|
|
}
|
|
return this;
|
|
}
|
|
_handleEvent(e, replay, inChartArea) {
|
|
const {_active: lastActive = [], options} = this;
|
|
const useFinalPosition = replay;
|
|
const active = this._getActiveElements(e, lastActive, inChartArea, useFinalPosition);
|
|
const isClick = _isClickEvent(e);
|
|
const lastEvent = determineLastEvent(e, this._lastEvent, inChartArea, isClick);
|
|
if (inChartArea) {
|
|
this._lastEvent = null;
|
|
callback(options.onHover, [e, active, this], this);
|
|
if (isClick) {
|
|
callback(options.onClick, [e, active, this], this);
|
|
}
|
|
}
|
|
const changed = !_elementsEqual(active, lastActive);
|
|
if (changed || replay) {
|
|
this._active = active;
|
|
this._updateHoverStyles(active, lastActive, replay);
|
|
}
|
|
this._lastEvent = lastEvent;
|
|
return changed;
|
|
}
|
|
_getActiveElements(e, lastActive, inChartArea, useFinalPosition) {
|
|
if (e.type === 'mouseout') {
|
|
return [];
|
|
}
|
|
if (!inChartArea) {
|
|
return lastActive;
|
|
}
|
|
const hoverOptions = this.options.hover;
|
|
return this.getElementsAtEventForMode(e, hoverOptions.mode, hoverOptions, useFinalPosition);
|
|
}
|
|
}
|
|
const invalidatePlugins = () => each(Chart.instances, (chart) => chart._plugins.invalidate());
|
|
const enumerable = true;
|
|
Object.defineProperties(Chart, {
|
|
defaults: {
|
|
enumerable,
|
|
value: defaults
|
|
},
|
|
instances: {
|
|
enumerable,
|
|
value: instances
|
|
},
|
|
overrides: {
|
|
enumerable,
|
|
value: overrides
|
|
},
|
|
registry: {
|
|
enumerable,
|
|
value: registry
|
|
},
|
|
version: {
|
|
enumerable,
|
|
value: version
|
|
},
|
|
getChart: {
|
|
enumerable,
|
|
value: getChart
|
|
},
|
|
register: {
|
|
enumerable,
|
|
value: (...items) => {
|
|
registry.add(...items);
|
|
invalidatePlugins();
|
|
}
|
|
},
|
|
unregister: {
|
|
enumerable,
|
|
value: (...items) => {
|
|
registry.remove(...items);
|
|
invalidatePlugins();
|
|
}
|
|
}
|
|
});
|
|
|
|
function clipArc(ctx, element, endAngle) {
|
|
const {startAngle, pixelMargin, x, y, outerRadius, innerRadius} = element;
|
|
let angleMargin = pixelMargin / outerRadius;
|
|
ctx.beginPath();
|
|
ctx.arc(x, y, outerRadius, startAngle - angleMargin, endAngle + angleMargin);
|
|
if (innerRadius > pixelMargin) {
|
|
angleMargin = pixelMargin / innerRadius;
|
|
ctx.arc(x, y, innerRadius, endAngle + angleMargin, startAngle - angleMargin, true);
|
|
} else {
|
|
ctx.arc(x, y, pixelMargin, endAngle + HALF_PI, startAngle - HALF_PI);
|
|
}
|
|
ctx.closePath();
|
|
ctx.clip();
|
|
}
|
|
function toRadiusCorners(value) {
|
|
return _readValueToProps(value, ['outerStart', 'outerEnd', 'innerStart', 'innerEnd']);
|
|
}
|
|
function parseBorderRadius$1(arc, innerRadius, outerRadius, angleDelta) {
|
|
const o = toRadiusCorners(arc.options.borderRadius);
|
|
const halfThickness = (outerRadius - innerRadius) / 2;
|
|
const innerLimit = Math.min(halfThickness, angleDelta * innerRadius / 2);
|
|
const computeOuterLimit = (val) => {
|
|
const outerArcLimit = (outerRadius - Math.min(halfThickness, val)) * angleDelta / 2;
|
|
return _limitValue(val, 0, Math.min(halfThickness, outerArcLimit));
|
|
};
|
|
return {
|
|
outerStart: computeOuterLimit(o.outerStart),
|
|
outerEnd: computeOuterLimit(o.outerEnd),
|
|
innerStart: _limitValue(o.innerStart, 0, innerLimit),
|
|
innerEnd: _limitValue(o.innerEnd, 0, innerLimit),
|
|
};
|
|
}
|
|
function rThetaToXY(r, theta, x, y) {
|
|
return {
|
|
x: x + r * Math.cos(theta),
|
|
y: y + r * Math.sin(theta),
|
|
};
|
|
}
|
|
function pathArc(ctx, element, offset, spacing, end, circular) {
|
|
const {x, y, startAngle: start, pixelMargin, innerRadius: innerR} = element;
|
|
const outerRadius = Math.max(element.outerRadius + spacing + offset - pixelMargin, 0);
|
|
const innerRadius = innerR > 0 ? innerR + spacing + offset + pixelMargin : 0;
|
|
let spacingOffset = 0;
|
|
const alpha = end - start;
|
|
if (spacing) {
|
|
const noSpacingInnerRadius = innerR > 0 ? innerR - spacing : 0;
|
|
const noSpacingOuterRadius = outerRadius > 0 ? outerRadius - spacing : 0;
|
|
const avNogSpacingRadius = (noSpacingInnerRadius + noSpacingOuterRadius) / 2;
|
|
const adjustedAngle = avNogSpacingRadius !== 0 ? (alpha * avNogSpacingRadius) / (avNogSpacingRadius + spacing) : alpha;
|
|
spacingOffset = (alpha - adjustedAngle) / 2;
|
|
}
|
|
const beta = Math.max(0.001, alpha * outerRadius - offset / PI) / outerRadius;
|
|
const angleOffset = (alpha - beta) / 2;
|
|
const startAngle = start + angleOffset + spacingOffset;
|
|
const endAngle = end - angleOffset - spacingOffset;
|
|
const {outerStart, outerEnd, innerStart, innerEnd} = parseBorderRadius$1(element, innerRadius, outerRadius, endAngle - startAngle);
|
|
const outerStartAdjustedRadius = outerRadius - outerStart;
|
|
const outerEndAdjustedRadius = outerRadius - outerEnd;
|
|
const outerStartAdjustedAngle = startAngle + outerStart / outerStartAdjustedRadius;
|
|
const outerEndAdjustedAngle = endAngle - outerEnd / outerEndAdjustedRadius;
|
|
const innerStartAdjustedRadius = innerRadius + innerStart;
|
|
const innerEndAdjustedRadius = innerRadius + innerEnd;
|
|
const innerStartAdjustedAngle = startAngle + innerStart / innerStartAdjustedRadius;
|
|
const innerEndAdjustedAngle = endAngle - innerEnd / innerEndAdjustedRadius;
|
|
ctx.beginPath();
|
|
if (circular) {
|
|
ctx.arc(x, y, outerRadius, outerStartAdjustedAngle, outerEndAdjustedAngle);
|
|
if (outerEnd > 0) {
|
|
const pCenter = rThetaToXY(outerEndAdjustedRadius, outerEndAdjustedAngle, x, y);
|
|
ctx.arc(pCenter.x, pCenter.y, outerEnd, outerEndAdjustedAngle, endAngle + HALF_PI);
|
|
}
|
|
const p4 = rThetaToXY(innerEndAdjustedRadius, endAngle, x, y);
|
|
ctx.lineTo(p4.x, p4.y);
|
|
if (innerEnd > 0) {
|
|
const pCenter = rThetaToXY(innerEndAdjustedRadius, innerEndAdjustedAngle, x, y);
|
|
ctx.arc(pCenter.x, pCenter.y, innerEnd, endAngle + HALF_PI, innerEndAdjustedAngle + Math.PI);
|
|
}
|
|
ctx.arc(x, y, innerRadius, endAngle - (innerEnd / innerRadius), startAngle + (innerStart / innerRadius), true);
|
|
if (innerStart > 0) {
|
|
const pCenter = rThetaToXY(innerStartAdjustedRadius, innerStartAdjustedAngle, x, y);
|
|
ctx.arc(pCenter.x, pCenter.y, innerStart, innerStartAdjustedAngle + Math.PI, startAngle - HALF_PI);
|
|
}
|
|
const p8 = rThetaToXY(outerStartAdjustedRadius, startAngle, x, y);
|
|
ctx.lineTo(p8.x, p8.y);
|
|
if (outerStart > 0) {
|
|
const pCenter = rThetaToXY(outerStartAdjustedRadius, outerStartAdjustedAngle, x, y);
|
|
ctx.arc(pCenter.x, pCenter.y, outerStart, startAngle - HALF_PI, outerStartAdjustedAngle);
|
|
}
|
|
} else {
|
|
ctx.moveTo(x, y);
|
|
const outerStartX = Math.cos(outerStartAdjustedAngle) * outerRadius + x;
|
|
const outerStartY = Math.sin(outerStartAdjustedAngle) * outerRadius + y;
|
|
ctx.lineTo(outerStartX, outerStartY);
|
|
const outerEndX = Math.cos(outerEndAdjustedAngle) * outerRadius + x;
|
|
const outerEndY = Math.sin(outerEndAdjustedAngle) * outerRadius + y;
|
|
ctx.lineTo(outerEndX, outerEndY);
|
|
}
|
|
ctx.closePath();
|
|
}
|
|
function drawArc(ctx, element, offset, spacing, circular) {
|
|
const {fullCircles, startAngle, circumference} = element;
|
|
let endAngle = element.endAngle;
|
|
if (fullCircles) {
|
|
pathArc(ctx, element, offset, spacing, startAngle + TAU, circular);
|
|
for (let i = 0; i < fullCircles; ++i) {
|
|
ctx.fill();
|
|
}
|
|
if (!isNaN(circumference)) {
|
|
endAngle = startAngle + circumference % TAU;
|
|
if (circumference % TAU === 0) {
|
|
endAngle += TAU;
|
|
}
|
|
}
|
|
}
|
|
pathArc(ctx, element, offset, spacing, endAngle, circular);
|
|
ctx.fill();
|
|
return endAngle;
|
|
}
|
|
function drawFullCircleBorders(ctx, element, inner) {
|
|
const {x, y, startAngle, pixelMargin, fullCircles} = element;
|
|
const outerRadius = Math.max(element.outerRadius - pixelMargin, 0);
|
|
const innerRadius = element.innerRadius + pixelMargin;
|
|
let i;
|
|
if (inner) {
|
|
clipArc(ctx, element, startAngle + TAU);
|
|
}
|
|
ctx.beginPath();
|
|
ctx.arc(x, y, innerRadius, startAngle + TAU, startAngle, true);
|
|
for (i = 0; i < fullCircles; ++i) {
|
|
ctx.stroke();
|
|
}
|
|
ctx.beginPath();
|
|
ctx.arc(x, y, outerRadius, startAngle, startAngle + TAU);
|
|
for (i = 0; i < fullCircles; ++i) {
|
|
ctx.stroke();
|
|
}
|
|
}
|
|
function drawBorder(ctx, element, offset, spacing, endAngle, circular) {
|
|
const {options} = element;
|
|
const {borderWidth, borderJoinStyle} = options;
|
|
const inner = options.borderAlign === 'inner';
|
|
if (!borderWidth) {
|
|
return;
|
|
}
|
|
if (inner) {
|
|
ctx.lineWidth = borderWidth * 2;
|
|
ctx.lineJoin = borderJoinStyle || 'round';
|
|
} else {
|
|
ctx.lineWidth = borderWidth;
|
|
ctx.lineJoin = borderJoinStyle || 'bevel';
|
|
}
|
|
if (element.fullCircles) {
|
|
drawFullCircleBorders(ctx, element, inner);
|
|
}
|
|
if (inner) {
|
|
clipArc(ctx, element, endAngle);
|
|
}
|
|
pathArc(ctx, element, offset, spacing, endAngle, circular);
|
|
ctx.stroke();
|
|
}
|
|
class ArcElement extends Element {
|
|
constructor(cfg) {
|
|
super();
|
|
this.options = undefined;
|
|
this.circumference = undefined;
|
|
this.startAngle = undefined;
|
|
this.endAngle = undefined;
|
|
this.innerRadius = undefined;
|
|
this.outerRadius = undefined;
|
|
this.pixelMargin = 0;
|
|
this.fullCircles = 0;
|
|
if (cfg) {
|
|
Object.assign(this, cfg);
|
|
}
|
|
}
|
|
inRange(chartX, chartY, useFinalPosition) {
|
|
const point = this.getProps(['x', 'y'], useFinalPosition);
|
|
const {angle, distance} = getAngleFromPoint(point, {x: chartX, y: chartY});
|
|
const {startAngle, endAngle, innerRadius, outerRadius, circumference} = this.getProps([
|
|
'startAngle',
|
|
'endAngle',
|
|
'innerRadius',
|
|
'outerRadius',
|
|
'circumference'
|
|
], useFinalPosition);
|
|
const rAdjust = this.options.spacing / 2;
|
|
const _circumference = valueOrDefault(circumference, endAngle - startAngle);
|
|
const betweenAngles = _circumference >= TAU || _angleBetween(angle, startAngle, endAngle);
|
|
const withinRadius = _isBetween(distance, innerRadius + rAdjust, outerRadius + rAdjust);
|
|
return (betweenAngles && withinRadius);
|
|
}
|
|
getCenterPoint(useFinalPosition) {
|
|
const {x, y, startAngle, endAngle, innerRadius, outerRadius} = this.getProps([
|
|
'x',
|
|
'y',
|
|
'startAngle',
|
|
'endAngle',
|
|
'innerRadius',
|
|
'outerRadius',
|
|
'circumference',
|
|
], useFinalPosition);
|
|
const {offset, spacing} = this.options;
|
|
const halfAngle = (startAngle + endAngle) / 2;
|
|
const halfRadius = (innerRadius + outerRadius + spacing + offset) / 2;
|
|
return {
|
|
x: x + Math.cos(halfAngle) * halfRadius,
|
|
y: y + Math.sin(halfAngle) * halfRadius
|
|
};
|
|
}
|
|
tooltipPosition(useFinalPosition) {
|
|
return this.getCenterPoint(useFinalPosition);
|
|
}
|
|
draw(ctx) {
|
|
const {options, circumference} = this;
|
|
const offset = (options.offset || 0) / 2;
|
|
const spacing = (options.spacing || 0) / 2;
|
|
const circular = options.circular;
|
|
this.pixelMargin = (options.borderAlign === 'inner') ? 0.33 : 0;
|
|
this.fullCircles = circumference > TAU ? Math.floor(circumference / TAU) : 0;
|
|
if (circumference === 0 || this.innerRadius < 0 || this.outerRadius < 0) {
|
|
return;
|
|
}
|
|
ctx.save();
|
|
let radiusOffset = 0;
|
|
if (offset) {
|
|
radiusOffset = offset / 2;
|
|
const halfAngle = (this.startAngle + this.endAngle) / 2;
|
|
ctx.translate(Math.cos(halfAngle) * radiusOffset, Math.sin(halfAngle) * radiusOffset);
|
|
if (this.circumference >= PI) {
|
|
radiusOffset = offset;
|
|
}
|
|
}
|
|
ctx.fillStyle = options.backgroundColor;
|
|
ctx.strokeStyle = options.borderColor;
|
|
const endAngle = drawArc(ctx, this, radiusOffset, spacing, circular);
|
|
drawBorder(ctx, this, radiusOffset, spacing, endAngle, circular);
|
|
ctx.restore();
|
|
}
|
|
}
|
|
ArcElement.id = 'arc';
|
|
ArcElement.defaults = {
|
|
borderAlign: 'center',
|
|
borderColor: '#fff',
|
|
borderJoinStyle: undefined,
|
|
borderRadius: 0,
|
|
borderWidth: 2,
|
|
offset: 0,
|
|
spacing: 0,
|
|
angle: undefined,
|
|
circular: true,
|
|
};
|
|
ArcElement.defaultRoutes = {
|
|
backgroundColor: 'backgroundColor'
|
|
};
|
|
|
|
function setStyle(ctx, options, style = options) {
|
|
ctx.lineCap = valueOrDefault(style.borderCapStyle, options.borderCapStyle);
|
|
ctx.setLineDash(valueOrDefault(style.borderDash, options.borderDash));
|
|
ctx.lineDashOffset = valueOrDefault(style.borderDashOffset, options.borderDashOffset);
|
|
ctx.lineJoin = valueOrDefault(style.borderJoinStyle, options.borderJoinStyle);
|
|
ctx.lineWidth = valueOrDefault(style.borderWidth, options.borderWidth);
|
|
ctx.strokeStyle = valueOrDefault(style.borderColor, options.borderColor);
|
|
}
|
|
function lineTo(ctx, previous, target) {
|
|
ctx.lineTo(target.x, target.y);
|
|
}
|
|
function getLineMethod(options) {
|
|
if (options.stepped) {
|
|
return _steppedLineTo;
|
|
}
|
|
if (options.tension || options.cubicInterpolationMode === 'monotone') {
|
|
return _bezierCurveTo;
|
|
}
|
|
return lineTo;
|
|
}
|
|
function pathVars(points, segment, params = {}) {
|
|
const count = points.length;
|
|
const {start: paramsStart = 0, end: paramsEnd = count - 1} = params;
|
|
const {start: segmentStart, end: segmentEnd} = segment;
|
|
const start = Math.max(paramsStart, segmentStart);
|
|
const end = Math.min(paramsEnd, segmentEnd);
|
|
const outside = paramsStart < segmentStart && paramsEnd < segmentStart || paramsStart > segmentEnd && paramsEnd > segmentEnd;
|
|
return {
|
|
count,
|
|
start,
|
|
loop: segment.loop,
|
|
ilen: end < start && !outside ? count + end - start : end - start
|
|
};
|
|
}
|
|
function pathSegment(ctx, line, segment, params) {
|
|
const {points, options} = line;
|
|
const {count, start, loop, ilen} = pathVars(points, segment, params);
|
|
const lineMethod = getLineMethod(options);
|
|
let {move = true, reverse} = params || {};
|
|
let i, point, prev;
|
|
for (i = 0; i <= ilen; ++i) {
|
|
point = points[(start + (reverse ? ilen - i : i)) % count];
|
|
if (point.skip) {
|
|
continue;
|
|
} else if (move) {
|
|
ctx.moveTo(point.x, point.y);
|
|
move = false;
|
|
} else {
|
|
lineMethod(ctx, prev, point, reverse, options.stepped);
|
|
}
|
|
prev = point;
|
|
}
|
|
if (loop) {
|
|
point = points[(start + (reverse ? ilen : 0)) % count];
|
|
lineMethod(ctx, prev, point, reverse, options.stepped);
|
|
}
|
|
return !!loop;
|
|
}
|
|
function fastPathSegment(ctx, line, segment, params) {
|
|
const points = line.points;
|
|
const {count, start, ilen} = pathVars(points, segment, params);
|
|
const {move = true, reverse} = params || {};
|
|
let avgX = 0;
|
|
let countX = 0;
|
|
let i, point, prevX, minY, maxY, lastY;
|
|
const pointIndex = (index) => (start + (reverse ? ilen - index : index)) % count;
|
|
const drawX = () => {
|
|
if (minY !== maxY) {
|
|
ctx.lineTo(avgX, maxY);
|
|
ctx.lineTo(avgX, minY);
|
|
ctx.lineTo(avgX, lastY);
|
|
}
|
|
};
|
|
if (move) {
|
|
point = points[pointIndex(0)];
|
|
ctx.moveTo(point.x, point.y);
|
|
}
|
|
for (i = 0; i <= ilen; ++i) {
|
|
point = points[pointIndex(i)];
|
|
if (point.skip) {
|
|
continue;
|
|
}
|
|
const x = point.x;
|
|
const y = point.y;
|
|
const truncX = x | 0;
|
|
if (truncX === prevX) {
|
|
if (y < minY) {
|
|
minY = y;
|
|
} else if (y > maxY) {
|
|
maxY = y;
|
|
}
|
|
avgX = (countX * avgX + x) / ++countX;
|
|
} else {
|
|
drawX();
|
|
ctx.lineTo(x, y);
|
|
prevX = truncX;
|
|
countX = 0;
|
|
minY = maxY = y;
|
|
}
|
|
lastY = y;
|
|
}
|
|
drawX();
|
|
}
|
|
function _getSegmentMethod(line) {
|
|
const opts = line.options;
|
|
const borderDash = opts.borderDash && opts.borderDash.length;
|
|
const useFastPath = !line._decimated && !line._loop && !opts.tension && opts.cubicInterpolationMode !== 'monotone' && !opts.stepped && !borderDash;
|
|
return useFastPath ? fastPathSegment : pathSegment;
|
|
}
|
|
function _getInterpolationMethod(options) {
|
|
if (options.stepped) {
|
|
return _steppedInterpolation;
|
|
}
|
|
if (options.tension || options.cubicInterpolationMode === 'monotone') {
|
|
return _bezierInterpolation;
|
|
}
|
|
return _pointInLine;
|
|
}
|
|
function strokePathWithCache(ctx, line, start, count) {
|
|
let path = line._path;
|
|
if (!path) {
|
|
path = line._path = new Path2D();
|
|
if (line.path(path, start, count)) {
|
|
path.closePath();
|
|
}
|
|
}
|
|
setStyle(ctx, line.options);
|
|
ctx.stroke(path);
|
|
}
|
|
function strokePathDirect(ctx, line, start, count) {
|
|
const {segments, options} = line;
|
|
const segmentMethod = _getSegmentMethod(line);
|
|
for (const segment of segments) {
|
|
setStyle(ctx, options, segment.style);
|
|
ctx.beginPath();
|
|
if (segmentMethod(ctx, line, segment, {start, end: start + count - 1})) {
|
|
ctx.closePath();
|
|
}
|
|
ctx.stroke();
|
|
}
|
|
}
|
|
const usePath2D = typeof Path2D === 'function';
|
|
function draw(ctx, line, start, count) {
|
|
if (usePath2D && !line.options.segment) {
|
|
strokePathWithCache(ctx, line, start, count);
|
|
} else {
|
|
strokePathDirect(ctx, line, start, count);
|
|
}
|
|
}
|
|
class LineElement extends Element {
|
|
constructor(cfg) {
|
|
super();
|
|
this.animated = true;
|
|
this.options = undefined;
|
|
this._chart = undefined;
|
|
this._loop = undefined;
|
|
this._fullLoop = undefined;
|
|
this._path = undefined;
|
|
this._points = undefined;
|
|
this._segments = undefined;
|
|
this._decimated = false;
|
|
this._pointsUpdated = false;
|
|
this._datasetIndex = undefined;
|
|
if (cfg) {
|
|
Object.assign(this, cfg);
|
|
}
|
|
}
|
|
updateControlPoints(chartArea, indexAxis) {
|
|
const options = this.options;
|
|
if ((options.tension || options.cubicInterpolationMode === 'monotone') && !options.stepped && !this._pointsUpdated) {
|
|
const loop = options.spanGaps ? this._loop : this._fullLoop;
|
|
_updateBezierControlPoints(this._points, options, chartArea, loop, indexAxis);
|
|
this._pointsUpdated = true;
|
|
}
|
|
}
|
|
set points(points) {
|
|
this._points = points;
|
|
delete this._segments;
|
|
delete this._path;
|
|
this._pointsUpdated = false;
|
|
}
|
|
get points() {
|
|
return this._points;
|
|
}
|
|
get segments() {
|
|
return this._segments || (this._segments = _computeSegments(this, this.options.segment));
|
|
}
|
|
first() {
|
|
const segments = this.segments;
|
|
const points = this.points;
|
|
return segments.length && points[segments[0].start];
|
|
}
|
|
last() {
|
|
const segments = this.segments;
|
|
const points = this.points;
|
|
const count = segments.length;
|
|
return count && points[segments[count - 1].end];
|
|
}
|
|
interpolate(point, property) {
|
|
const options = this.options;
|
|
const value = point[property];
|
|
const points = this.points;
|
|
const segments = _boundSegments(this, {property, start: value, end: value});
|
|
if (!segments.length) {
|
|
return;
|
|
}
|
|
const result = [];
|
|
const _interpolate = _getInterpolationMethod(options);
|
|
let i, ilen;
|
|
for (i = 0, ilen = segments.length; i < ilen; ++i) {
|
|
const {start, end} = segments[i];
|
|
const p1 = points[start];
|
|
const p2 = points[end];
|
|
if (p1 === p2) {
|
|
result.push(p1);
|
|
continue;
|
|
}
|
|
const t = Math.abs((value - p1[property]) / (p2[property] - p1[property]));
|
|
const interpolated = _interpolate(p1, p2, t, options.stepped);
|
|
interpolated[property] = point[property];
|
|
result.push(interpolated);
|
|
}
|
|
return result.length === 1 ? result[0] : result;
|
|
}
|
|
pathSegment(ctx, segment, params) {
|
|
const segmentMethod = _getSegmentMethod(this);
|
|
return segmentMethod(ctx, this, segment, params);
|
|
}
|
|
path(ctx, start, count) {
|
|
const segments = this.segments;
|
|
const segmentMethod = _getSegmentMethod(this);
|
|
let loop = this._loop;
|
|
start = start || 0;
|
|
count = count || (this.points.length - start);
|
|
for (const segment of segments) {
|
|
loop &= segmentMethod(ctx, this, segment, {start, end: start + count - 1});
|
|
}
|
|
return !!loop;
|
|
}
|
|
draw(ctx, chartArea, start, count) {
|
|
const options = this.options || {};
|
|
const points = this.points || [];
|
|
if (points.length && options.borderWidth) {
|
|
ctx.save();
|
|
draw(ctx, this, start, count);
|
|
ctx.restore();
|
|
}
|
|
if (this.animated) {
|
|
this._pointsUpdated = false;
|
|
this._path = undefined;
|
|
}
|
|
}
|
|
}
|
|
LineElement.id = 'line';
|
|
LineElement.defaults = {
|
|
borderCapStyle: 'butt',
|
|
borderDash: [],
|
|
borderDashOffset: 0,
|
|
borderJoinStyle: 'miter',
|
|
borderWidth: 3,
|
|
capBezierPoints: true,
|
|
cubicInterpolationMode: 'default',
|
|
fill: false,
|
|
spanGaps: false,
|
|
stepped: false,
|
|
tension: 0,
|
|
};
|
|
LineElement.defaultRoutes = {
|
|
backgroundColor: 'backgroundColor',
|
|
borderColor: 'borderColor'
|
|
};
|
|
LineElement.descriptors = {
|
|
_scriptable: true,
|
|
_indexable: (name) => name !== 'borderDash' && name !== 'fill',
|
|
};
|
|
|
|
function inRange$1(el, pos, axis, useFinalPosition) {
|
|
const options = el.options;
|
|
const {[axis]: value} = el.getProps([axis], useFinalPosition);
|
|
return (Math.abs(pos - value) < options.radius + options.hitRadius);
|
|
}
|
|
class PointElement extends Element {
|
|
constructor(cfg) {
|
|
super();
|
|
this.options = undefined;
|
|
this.parsed = undefined;
|
|
this.skip = undefined;
|
|
this.stop = undefined;
|
|
if (cfg) {
|
|
Object.assign(this, cfg);
|
|
}
|
|
}
|
|
inRange(mouseX, mouseY, useFinalPosition) {
|
|
const options = this.options;
|
|
const {x, y} = this.getProps(['x', 'y'], useFinalPosition);
|
|
return ((Math.pow(mouseX - x, 2) + Math.pow(mouseY - y, 2)) < Math.pow(options.hitRadius + options.radius, 2));
|
|
}
|
|
inXRange(mouseX, useFinalPosition) {
|
|
return inRange$1(this, mouseX, 'x', useFinalPosition);
|
|
}
|
|
inYRange(mouseY, useFinalPosition) {
|
|
return inRange$1(this, mouseY, 'y', useFinalPosition);
|
|
}
|
|
getCenterPoint(useFinalPosition) {
|
|
const {x, y} = this.getProps(['x', 'y'], useFinalPosition);
|
|
return {x, y};
|
|
}
|
|
size(options) {
|
|
options = options || this.options || {};
|
|
let radius = options.radius || 0;
|
|
radius = Math.max(radius, radius && options.hoverRadius || 0);
|
|
const borderWidth = radius && options.borderWidth || 0;
|
|
return (radius + borderWidth) * 2;
|
|
}
|
|
draw(ctx, area) {
|
|
const options = this.options;
|
|
if (this.skip || options.radius < 0.1 || !_isPointInArea(this, area, this.size(options) / 2)) {
|
|
return;
|
|
}
|
|
ctx.strokeStyle = options.borderColor;
|
|
ctx.lineWidth = options.borderWidth;
|
|
ctx.fillStyle = options.backgroundColor;
|
|
drawPoint(ctx, options, this.x, this.y);
|
|
}
|
|
getRange() {
|
|
const options = this.options || {};
|
|
return options.radius + options.hitRadius;
|
|
}
|
|
}
|
|
PointElement.id = 'point';
|
|
PointElement.defaults = {
|
|
borderWidth: 1,
|
|
hitRadius: 1,
|
|
hoverBorderWidth: 1,
|
|
hoverRadius: 4,
|
|
pointStyle: 'circle',
|
|
radius: 3,
|
|
rotation: 0
|
|
};
|
|
PointElement.defaultRoutes = {
|
|
backgroundColor: 'backgroundColor',
|
|
borderColor: 'borderColor'
|
|
};
|
|
|
|
function getBarBounds(bar, useFinalPosition) {
|
|
const {x, y, base, width, height} = bar.getProps(['x', 'y', 'base', 'width', 'height'], useFinalPosition);
|
|
let left, right, top, bottom, half;
|
|
if (bar.horizontal) {
|
|
half = height / 2;
|
|
left = Math.min(x, base);
|
|
right = Math.max(x, base);
|
|
top = y - half;
|
|
bottom = y + half;
|
|
} else {
|
|
half = width / 2;
|
|
left = x - half;
|
|
right = x + half;
|
|
top = Math.min(y, base);
|
|
bottom = Math.max(y, base);
|
|
}
|
|
return {left, top, right, bottom};
|
|
}
|
|
function skipOrLimit(skip, value, min, max) {
|
|
return skip ? 0 : _limitValue(value, min, max);
|
|
}
|
|
function parseBorderWidth(bar, maxW, maxH) {
|
|
const value = bar.options.borderWidth;
|
|
const skip = bar.borderSkipped;
|
|
const o = toTRBL(value);
|
|
return {
|
|
t: skipOrLimit(skip.top, o.top, 0, maxH),
|
|
r: skipOrLimit(skip.right, o.right, 0, maxW),
|
|
b: skipOrLimit(skip.bottom, o.bottom, 0, maxH),
|
|
l: skipOrLimit(skip.left, o.left, 0, maxW)
|
|
};
|
|
}
|
|
function parseBorderRadius(bar, maxW, maxH) {
|
|
const {enableBorderRadius} = bar.getProps(['enableBorderRadius']);
|
|
const value = bar.options.borderRadius;
|
|
const o = toTRBLCorners(value);
|
|
const maxR = Math.min(maxW, maxH);
|
|
const skip = bar.borderSkipped;
|
|
const enableBorder = enableBorderRadius || isObject(value);
|
|
return {
|
|
topLeft: skipOrLimit(!enableBorder || skip.top || skip.left, o.topLeft, 0, maxR),
|
|
topRight: skipOrLimit(!enableBorder || skip.top || skip.right, o.topRight, 0, maxR),
|
|
bottomLeft: skipOrLimit(!enableBorder || skip.bottom || skip.left, o.bottomLeft, 0, maxR),
|
|
bottomRight: skipOrLimit(!enableBorder || skip.bottom || skip.right, o.bottomRight, 0, maxR)
|
|
};
|
|
}
|
|
function boundingRects(bar) {
|
|
const bounds = getBarBounds(bar);
|
|
const width = bounds.right - bounds.left;
|
|
const height = bounds.bottom - bounds.top;
|
|
const border = parseBorderWidth(bar, width / 2, height / 2);
|
|
const radius = parseBorderRadius(bar, width / 2, height / 2);
|
|
return {
|
|
outer: {
|
|
x: bounds.left,
|
|
y: bounds.top,
|
|
w: width,
|
|
h: height,
|
|
radius
|
|
},
|
|
inner: {
|
|
x: bounds.left + border.l,
|
|
y: bounds.top + border.t,
|
|
w: width - border.l - border.r,
|
|
h: height - border.t - border.b,
|
|
radius: {
|
|
topLeft: Math.max(0, radius.topLeft - Math.max(border.t, border.l)),
|
|
topRight: Math.max(0, radius.topRight - Math.max(border.t, border.r)),
|
|
bottomLeft: Math.max(0, radius.bottomLeft - Math.max(border.b, border.l)),
|
|
bottomRight: Math.max(0, radius.bottomRight - Math.max(border.b, border.r)),
|
|
}
|
|
}
|
|
};
|
|
}
|
|
function inRange(bar, x, y, useFinalPosition) {
|
|
const skipX = x === null;
|
|
const skipY = y === null;
|
|
const skipBoth = skipX && skipY;
|
|
const bounds = bar && !skipBoth && getBarBounds(bar, useFinalPosition);
|
|
return bounds
|
|
&& (skipX || _isBetween(x, bounds.left, bounds.right))
|
|
&& (skipY || _isBetween(y, bounds.top, bounds.bottom));
|
|
}
|
|
function hasRadius(radius) {
|
|
return radius.topLeft || radius.topRight || radius.bottomLeft || radius.bottomRight;
|
|
}
|
|
function addNormalRectPath(ctx, rect) {
|
|
ctx.rect(rect.x, rect.y, rect.w, rect.h);
|
|
}
|
|
function inflateRect(rect, amount, refRect = {}) {
|
|
const x = rect.x !== refRect.x ? -amount : 0;
|
|
const y = rect.y !== refRect.y ? -amount : 0;
|
|
const w = (rect.x + rect.w !== refRect.x + refRect.w ? amount : 0) - x;
|
|
const h = (rect.y + rect.h !== refRect.y + refRect.h ? amount : 0) - y;
|
|
return {
|
|
x: rect.x + x,
|
|
y: rect.y + y,
|
|
w: rect.w + w,
|
|
h: rect.h + h,
|
|
radius: rect.radius
|
|
};
|
|
}
|
|
class BarElement extends Element {
|
|
constructor(cfg) {
|
|
super();
|
|
this.options = undefined;
|
|
this.horizontal = undefined;
|
|
this.base = undefined;
|
|
this.width = undefined;
|
|
this.height = undefined;
|
|
this.inflateAmount = undefined;
|
|
if (cfg) {
|
|
Object.assign(this, cfg);
|
|
}
|
|
}
|
|
draw(ctx) {
|
|
const {inflateAmount, options: {borderColor, backgroundColor}} = this;
|
|
const {inner, outer} = boundingRects(this);
|
|
const addRectPath = hasRadius(outer.radius) ? addRoundedRectPath : addNormalRectPath;
|
|
ctx.save();
|
|
if (outer.w !== inner.w || outer.h !== inner.h) {
|
|
ctx.beginPath();
|
|
addRectPath(ctx, inflateRect(outer, inflateAmount, inner));
|
|
ctx.clip();
|
|
addRectPath(ctx, inflateRect(inner, -inflateAmount, outer));
|
|
ctx.fillStyle = borderColor;
|
|
ctx.fill('evenodd');
|
|
}
|
|
ctx.beginPath();
|
|
addRectPath(ctx, inflateRect(inner, inflateAmount));
|
|
ctx.fillStyle = backgroundColor;
|
|
ctx.fill();
|
|
ctx.restore();
|
|
}
|
|
inRange(mouseX, mouseY, useFinalPosition) {
|
|
return inRange(this, mouseX, mouseY, useFinalPosition);
|
|
}
|
|
inXRange(mouseX, useFinalPosition) {
|
|
return inRange(this, mouseX, null, useFinalPosition);
|
|
}
|
|
inYRange(mouseY, useFinalPosition) {
|
|
return inRange(this, null, mouseY, useFinalPosition);
|
|
}
|
|
getCenterPoint(useFinalPosition) {
|
|
const {x, y, base, horizontal} = this.getProps(['x', 'y', 'base', 'horizontal'], useFinalPosition);
|
|
return {
|
|
x: horizontal ? (x + base) / 2 : x,
|
|
y: horizontal ? y : (y + base) / 2
|
|
};
|
|
}
|
|
getRange(axis) {
|
|
return axis === 'x' ? this.width / 2 : this.height / 2;
|
|
}
|
|
}
|
|
BarElement.id = 'bar';
|
|
BarElement.defaults = {
|
|
borderSkipped: 'start',
|
|
borderWidth: 0,
|
|
borderRadius: 0,
|
|
inflateAmount: 'auto',
|
|
pointStyle: undefined
|
|
};
|
|
BarElement.defaultRoutes = {
|
|
backgroundColor: 'backgroundColor',
|
|
borderColor: 'borderColor'
|
|
};
|
|
|
|
var elements = /*#__PURE__*/Object.freeze({
|
|
__proto__: null,
|
|
ArcElement: ArcElement,
|
|
LineElement: LineElement,
|
|
PointElement: PointElement,
|
|
BarElement: BarElement
|
|
});
|
|
|
|
function lttbDecimation(data, start, count, availableWidth, options) {
|
|
const samples = options.samples || availableWidth;
|
|
if (samples >= count) {
|
|
return data.slice(start, start + count);
|
|
}
|
|
const decimated = [];
|
|
const bucketWidth = (count - 2) / (samples - 2);
|
|
let sampledIndex = 0;
|
|
const endIndex = start + count - 1;
|
|
let a = start;
|
|
let i, maxAreaPoint, maxArea, area, nextA;
|
|
decimated[sampledIndex++] = data[a];
|
|
for (i = 0; i < samples - 2; i++) {
|
|
let avgX = 0;
|
|
let avgY = 0;
|
|
let j;
|
|
const avgRangeStart = Math.floor((i + 1) * bucketWidth) + 1 + start;
|
|
const avgRangeEnd = Math.min(Math.floor((i + 2) * bucketWidth) + 1, count) + start;
|
|
const avgRangeLength = avgRangeEnd - avgRangeStart;
|
|
for (j = avgRangeStart; j < avgRangeEnd; j++) {
|
|
avgX += data[j].x;
|
|
avgY += data[j].y;
|
|
}
|
|
avgX /= avgRangeLength;
|
|
avgY /= avgRangeLength;
|
|
const rangeOffs = Math.floor(i * bucketWidth) + 1 + start;
|
|
const rangeTo = Math.min(Math.floor((i + 1) * bucketWidth) + 1, count) + start;
|
|
const {x: pointAx, y: pointAy} = data[a];
|
|
maxArea = area = -1;
|
|
for (j = rangeOffs; j < rangeTo; j++) {
|
|
area = 0.5 * Math.abs(
|
|
(pointAx - avgX) * (data[j].y - pointAy) -
|
|
(pointAx - data[j].x) * (avgY - pointAy)
|
|
);
|
|
if (area > maxArea) {
|
|
maxArea = area;
|
|
maxAreaPoint = data[j];
|
|
nextA = j;
|
|
}
|
|
}
|
|
decimated[sampledIndex++] = maxAreaPoint;
|
|
a = nextA;
|
|
}
|
|
decimated[sampledIndex++] = data[endIndex];
|
|
return decimated;
|
|
}
|
|
function minMaxDecimation(data, start, count, availableWidth) {
|
|
let avgX = 0;
|
|
let countX = 0;
|
|
let i, point, x, y, prevX, minIndex, maxIndex, startIndex, minY, maxY;
|
|
const decimated = [];
|
|
const endIndex = start + count - 1;
|
|
const xMin = data[start].x;
|
|
const xMax = data[endIndex].x;
|
|
const dx = xMax - xMin;
|
|
for (i = start; i < start + count; ++i) {
|
|
point = data[i];
|
|
x = (point.x - xMin) / dx * availableWidth;
|
|
y = point.y;
|
|
const truncX = x | 0;
|
|
if (truncX === prevX) {
|
|
if (y < minY) {
|
|
minY = y;
|
|
minIndex = i;
|
|
} else if (y > maxY) {
|
|
maxY = y;
|
|
maxIndex = i;
|
|
}
|
|
avgX = (countX * avgX + point.x) / ++countX;
|
|
} else {
|
|
const lastIndex = i - 1;
|
|
if (!isNullOrUndef(minIndex) && !isNullOrUndef(maxIndex)) {
|
|
const intermediateIndex1 = Math.min(minIndex, maxIndex);
|
|
const intermediateIndex2 = Math.max(minIndex, maxIndex);
|
|
if (intermediateIndex1 !== startIndex && intermediateIndex1 !== lastIndex) {
|
|
decimated.push({
|
|
...data[intermediateIndex1],
|
|
x: avgX,
|
|
});
|
|
}
|
|
if (intermediateIndex2 !== startIndex && intermediateIndex2 !== lastIndex) {
|
|
decimated.push({
|
|
...data[intermediateIndex2],
|
|
x: avgX
|
|
});
|
|
}
|
|
}
|
|
if (i > 0 && lastIndex !== startIndex) {
|
|
decimated.push(data[lastIndex]);
|
|
}
|
|
decimated.push(point);
|
|
prevX = truncX;
|
|
countX = 0;
|
|
minY = maxY = y;
|
|
minIndex = maxIndex = startIndex = i;
|
|
}
|
|
}
|
|
return decimated;
|
|
}
|
|
function cleanDecimatedDataset(dataset) {
|
|
if (dataset._decimated) {
|
|
const data = dataset._data;
|
|
delete dataset._decimated;
|
|
delete dataset._data;
|
|
Object.defineProperty(dataset, 'data', {value: data});
|
|
}
|
|
}
|
|
function cleanDecimatedData(chart) {
|
|
chart.data.datasets.forEach((dataset) => {
|
|
cleanDecimatedDataset(dataset);
|
|
});
|
|
}
|
|
function getStartAndCountOfVisiblePointsSimplified(meta, points) {
|
|
const pointCount = points.length;
|
|
let start = 0;
|
|
let count;
|
|
const {iScale} = meta;
|
|
const {min, max, minDefined, maxDefined} = iScale.getUserBounds();
|
|
if (minDefined) {
|
|
start = _limitValue(_lookupByKey(points, iScale.axis, min).lo, 0, pointCount - 1);
|
|
}
|
|
if (maxDefined) {
|
|
count = _limitValue(_lookupByKey(points, iScale.axis, max).hi + 1, start, pointCount) - start;
|
|
} else {
|
|
count = pointCount - start;
|
|
}
|
|
return {start, count};
|
|
}
|
|
var plugin_decimation = {
|
|
id: 'decimation',
|
|
defaults: {
|
|
algorithm: 'min-max',
|
|
enabled: false,
|
|
},
|
|
beforeElementsUpdate: (chart, args, options) => {
|
|
if (!options.enabled) {
|
|
cleanDecimatedData(chart);
|
|
return;
|
|
}
|
|
const availableWidth = chart.width;
|
|
chart.data.datasets.forEach((dataset, datasetIndex) => {
|
|
const {_data, indexAxis} = dataset;
|
|
const meta = chart.getDatasetMeta(datasetIndex);
|
|
const data = _data || dataset.data;
|
|
if (resolve([indexAxis, chart.options.indexAxis]) === 'y') {
|
|
return;
|
|
}
|
|
if (!meta.controller.supportsDecimation) {
|
|
return;
|
|
}
|
|
const xAxis = chart.scales[meta.xAxisID];
|
|
if (xAxis.type !== 'linear' && xAxis.type !== 'time') {
|
|
return;
|
|
}
|
|
if (chart.options.parsing) {
|
|
return;
|
|
}
|
|
let {start, count} = getStartAndCountOfVisiblePointsSimplified(meta, data);
|
|
const threshold = options.threshold || 4 * availableWidth;
|
|
if (count <= threshold) {
|
|
cleanDecimatedDataset(dataset);
|
|
return;
|
|
}
|
|
if (isNullOrUndef(_data)) {
|
|
dataset._data = data;
|
|
delete dataset.data;
|
|
Object.defineProperty(dataset, 'data', {
|
|
configurable: true,
|
|
enumerable: true,
|
|
get: function() {
|
|
return this._decimated;
|
|
},
|
|
set: function(d) {
|
|
this._data = d;
|
|
}
|
|
});
|
|
}
|
|
let decimated;
|
|
switch (options.algorithm) {
|
|
case 'lttb':
|
|
decimated = lttbDecimation(data, start, count, availableWidth, options);
|
|
break;
|
|
case 'min-max':
|
|
decimated = minMaxDecimation(data, start, count, availableWidth);
|
|
break;
|
|
default:
|
|
throw new Error(`Unsupported decimation algorithm '${options.algorithm}'`);
|
|
}
|
|
dataset._decimated = decimated;
|
|
});
|
|
},
|
|
destroy(chart) {
|
|
cleanDecimatedData(chart);
|
|
}
|
|
};
|
|
|
|
function _segments(line, target, property) {
|
|
const segments = line.segments;
|
|
const points = line.points;
|
|
const tpoints = target.points;
|
|
const parts = [];
|
|
for (const segment of segments) {
|
|
let {start, end} = segment;
|
|
end = _findSegmentEnd(start, end, points);
|
|
const bounds = _getBounds(property, points[start], points[end], segment.loop);
|
|
if (!target.segments) {
|
|
parts.push({
|
|
source: segment,
|
|
target: bounds,
|
|
start: points[start],
|
|
end: points[end]
|
|
});
|
|
continue;
|
|
}
|
|
const targetSegments = _boundSegments(target, bounds);
|
|
for (const tgt of targetSegments) {
|
|
const subBounds = _getBounds(property, tpoints[tgt.start], tpoints[tgt.end], tgt.loop);
|
|
const fillSources = _boundSegment(segment, points, subBounds);
|
|
for (const fillSource of fillSources) {
|
|
parts.push({
|
|
source: fillSource,
|
|
target: tgt,
|
|
start: {
|
|
[property]: _getEdge(bounds, subBounds, 'start', Math.max)
|
|
},
|
|
end: {
|
|
[property]: _getEdge(bounds, subBounds, 'end', Math.min)
|
|
}
|
|
});
|
|
}
|
|
}
|
|
}
|
|
return parts;
|
|
}
|
|
function _getBounds(property, first, last, loop) {
|
|
if (loop) {
|
|
return;
|
|
}
|
|
let start = first[property];
|
|
let end = last[property];
|
|
if (property === 'angle') {
|
|
start = _normalizeAngle(start);
|
|
end = _normalizeAngle(end);
|
|
}
|
|
return {property, start, end};
|
|
}
|
|
function _pointsFromSegments(boundary, line) {
|
|
const {x = null, y = null} = boundary || {};
|
|
const linePoints = line.points;
|
|
const points = [];
|
|
line.segments.forEach(({start, end}) => {
|
|
end = _findSegmentEnd(start, end, linePoints);
|
|
const first = linePoints[start];
|
|
const last = linePoints[end];
|
|
if (y !== null) {
|
|
points.push({x: first.x, y});
|
|
points.push({x: last.x, y});
|
|
} else if (x !== null) {
|
|
points.push({x, y: first.y});
|
|
points.push({x, y: last.y});
|
|
}
|
|
});
|
|
return points;
|
|
}
|
|
function _findSegmentEnd(start, end, points) {
|
|
for (;end > start; end--) {
|
|
const point = points[end];
|
|
if (!isNaN(point.x) && !isNaN(point.y)) {
|
|
break;
|
|
}
|
|
}
|
|
return end;
|
|
}
|
|
function _getEdge(a, b, prop, fn) {
|
|
if (a && b) {
|
|
return fn(a[prop], b[prop]);
|
|
}
|
|
return a ? a[prop] : b ? b[prop] : 0;
|
|
}
|
|
|
|
function _createBoundaryLine(boundary, line) {
|
|
let points = [];
|
|
let _loop = false;
|
|
if (isArray(boundary)) {
|
|
_loop = true;
|
|
points = boundary;
|
|
} else {
|
|
points = _pointsFromSegments(boundary, line);
|
|
}
|
|
return points.length ? new LineElement({
|
|
points,
|
|
options: {tension: 0},
|
|
_loop,
|
|
_fullLoop: _loop
|
|
}) : null;
|
|
}
|
|
function _shouldApplyFill(source) {
|
|
return source && source.fill !== false;
|
|
}
|
|
|
|
function _resolveTarget(sources, index, propagate) {
|
|
const source = sources[index];
|
|
let fill = source.fill;
|
|
const visited = [index];
|
|
let target;
|
|
if (!propagate) {
|
|
return fill;
|
|
}
|
|
while (fill !== false && visited.indexOf(fill) === -1) {
|
|
if (!isNumberFinite(fill)) {
|
|
return fill;
|
|
}
|
|
target = sources[fill];
|
|
if (!target) {
|
|
return false;
|
|
}
|
|
if (target.visible) {
|
|
return fill;
|
|
}
|
|
visited.push(fill);
|
|
fill = target.fill;
|
|
}
|
|
return false;
|
|
}
|
|
function _decodeFill(line, index, count) {
|
|
const fill = parseFillOption(line);
|
|
if (isObject(fill)) {
|
|
return isNaN(fill.value) ? false : fill;
|
|
}
|
|
let target = parseFloat(fill);
|
|
if (isNumberFinite(target) && Math.floor(target) === target) {
|
|
return decodeTargetIndex(fill[0], index, target, count);
|
|
}
|
|
return ['origin', 'start', 'end', 'stack', 'shape'].indexOf(fill) >= 0 && fill;
|
|
}
|
|
function decodeTargetIndex(firstCh, index, target, count) {
|
|
if (firstCh === '-' || firstCh === '+') {
|
|
target = index + target;
|
|
}
|
|
if (target === index || target < 0 || target >= count) {
|
|
return false;
|
|
}
|
|
return target;
|
|
}
|
|
function _getTargetPixel(fill, scale) {
|
|
let pixel = null;
|
|
if (fill === 'start') {
|
|
pixel = scale.bottom;
|
|
} else if (fill === 'end') {
|
|
pixel = scale.top;
|
|
} else if (isObject(fill)) {
|
|
pixel = scale.getPixelForValue(fill.value);
|
|
} else if (scale.getBasePixel) {
|
|
pixel = scale.getBasePixel();
|
|
}
|
|
return pixel;
|
|
}
|
|
function _getTargetValue(fill, scale, startValue) {
|
|
let value;
|
|
if (fill === 'start') {
|
|
value = startValue;
|
|
} else if (fill === 'end') {
|
|
value = scale.options.reverse ? scale.min : scale.max;
|
|
} else if (isObject(fill)) {
|
|
value = fill.value;
|
|
} else {
|
|
value = scale.getBaseValue();
|
|
}
|
|
return value;
|
|
}
|
|
function parseFillOption(line) {
|
|
const options = line.options;
|
|
const fillOption = options.fill;
|
|
let fill = valueOrDefault(fillOption && fillOption.target, fillOption);
|
|
if (fill === undefined) {
|
|
fill = !!options.backgroundColor;
|
|
}
|
|
if (fill === false || fill === null) {
|
|
return false;
|
|
}
|
|
if (fill === true) {
|
|
return 'origin';
|
|
}
|
|
return fill;
|
|
}
|
|
|
|
function _buildStackLine(source) {
|
|
const {scale, index, line} = source;
|
|
const points = [];
|
|
const segments = line.segments;
|
|
const sourcePoints = line.points;
|
|
const linesBelow = getLinesBelow(scale, index);
|
|
linesBelow.push(_createBoundaryLine({x: null, y: scale.bottom}, line));
|
|
for (let i = 0; i < segments.length; i++) {
|
|
const segment = segments[i];
|
|
for (let j = segment.start; j <= segment.end; j++) {
|
|
addPointsBelow(points, sourcePoints[j], linesBelow);
|
|
}
|
|
}
|
|
return new LineElement({points, options: {}});
|
|
}
|
|
function getLinesBelow(scale, index) {
|
|
const below = [];
|
|
const metas = scale.getMatchingVisibleMetas('line');
|
|
for (let i = 0; i < metas.length; i++) {
|
|
const meta = metas[i];
|
|
if (meta.index === index) {
|
|
break;
|
|
}
|
|
if (!meta.hidden) {
|
|
below.unshift(meta.dataset);
|
|
}
|
|
}
|
|
return below;
|
|
}
|
|
function addPointsBelow(points, sourcePoint, linesBelow) {
|
|
const postponed = [];
|
|
for (let j = 0; j < linesBelow.length; j++) {
|
|
const line = linesBelow[j];
|
|
const {first, last, point} = findPoint(line, sourcePoint, 'x');
|
|
if (!point || (first && last)) {
|
|
continue;
|
|
}
|
|
if (first) {
|
|
postponed.unshift(point);
|
|
} else {
|
|
points.push(point);
|
|
if (!last) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
points.push(...postponed);
|
|
}
|
|
function findPoint(line, sourcePoint, property) {
|
|
const point = line.interpolate(sourcePoint, property);
|
|
if (!point) {
|
|
return {};
|
|
}
|
|
const pointValue = point[property];
|
|
const segments = line.segments;
|
|
const linePoints = line.points;
|
|
let first = false;
|
|
let last = false;
|
|
for (let i = 0; i < segments.length; i++) {
|
|
const segment = segments[i];
|
|
const firstValue = linePoints[segment.start][property];
|
|
const lastValue = linePoints[segment.end][property];
|
|
if (_isBetween(pointValue, firstValue, lastValue)) {
|
|
first = pointValue === firstValue;
|
|
last = pointValue === lastValue;
|
|
break;
|
|
}
|
|
}
|
|
return {first, last, point};
|
|
}
|
|
|
|
class simpleArc {
|
|
constructor(opts) {
|
|
this.x = opts.x;
|
|
this.y = opts.y;
|
|
this.radius = opts.radius;
|
|
}
|
|
pathSegment(ctx, bounds, opts) {
|
|
const {x, y, radius} = this;
|
|
bounds = bounds || {start: 0, end: TAU};
|
|
ctx.arc(x, y, radius, bounds.end, bounds.start, true);
|
|
return !opts.bounds;
|
|
}
|
|
interpolate(point) {
|
|
const {x, y, radius} = this;
|
|
const angle = point.angle;
|
|
return {
|
|
x: x + Math.cos(angle) * radius,
|
|
y: y + Math.sin(angle) * radius,
|
|
angle
|
|
};
|
|
}
|
|
}
|
|
|
|
function _getTarget(source) {
|
|
const {chart, fill, line} = source;
|
|
if (isNumberFinite(fill)) {
|
|
return getLineByIndex(chart, fill);
|
|
}
|
|
if (fill === 'stack') {
|
|
return _buildStackLine(source);
|
|
}
|
|
if (fill === 'shape') {
|
|
return true;
|
|
}
|
|
const boundary = computeBoundary(source);
|
|
if (boundary instanceof simpleArc) {
|
|
return boundary;
|
|
}
|
|
return _createBoundaryLine(boundary, line);
|
|
}
|
|
function getLineByIndex(chart, index) {
|
|
const meta = chart.getDatasetMeta(index);
|
|
const visible = meta && chart.isDatasetVisible(index);
|
|
return visible ? meta.dataset : null;
|
|
}
|
|
function computeBoundary(source) {
|
|
const scale = source.scale || {};
|
|
if (scale.getPointPositionForValue) {
|
|
return computeCircularBoundary(source);
|
|
}
|
|
return computeLinearBoundary(source);
|
|
}
|
|
function computeLinearBoundary(source) {
|
|
const {scale = {}, fill} = source;
|
|
const pixel = _getTargetPixel(fill, scale);
|
|
if (isNumberFinite(pixel)) {
|
|
const horizontal = scale.isHorizontal();
|
|
return {
|
|
x: horizontal ? pixel : null,
|
|
y: horizontal ? null : pixel
|
|
};
|
|
}
|
|
return null;
|
|
}
|
|
function computeCircularBoundary(source) {
|
|
const {scale, fill} = source;
|
|
const options = scale.options;
|
|
const length = scale.getLabels().length;
|
|
const start = options.reverse ? scale.max : scale.min;
|
|
const value = _getTargetValue(fill, scale, start);
|
|
const target = [];
|
|
if (options.grid.circular) {
|
|
const center = scale.getPointPositionForValue(0, start);
|
|
return new simpleArc({
|
|
x: center.x,
|
|
y: center.y,
|
|
radius: scale.getDistanceFromCenterForValue(value)
|
|
});
|
|
}
|
|
for (let i = 0; i < length; ++i) {
|
|
target.push(scale.getPointPositionForValue(i, value));
|
|
}
|
|
return target;
|
|
}
|
|
|
|
function _drawfill(ctx, source, area) {
|
|
const target = _getTarget(source);
|
|
const {line, scale, axis} = source;
|
|
const lineOpts = line.options;
|
|
const fillOption = lineOpts.fill;
|
|
const color = lineOpts.backgroundColor;
|
|
const {above = color, below = color} = fillOption || {};
|
|
if (target && line.points.length) {
|
|
clipArea(ctx, area);
|
|
doFill(ctx, {line, target, above, below, area, scale, axis});
|
|
unclipArea(ctx);
|
|
}
|
|
}
|
|
function doFill(ctx, cfg) {
|
|
const {line, target, above, below, area, scale} = cfg;
|
|
const property = line._loop ? 'angle' : cfg.axis;
|
|
ctx.save();
|
|
if (property === 'x' && below !== above) {
|
|
clipVertical(ctx, target, area.top);
|
|
fill(ctx, {line, target, color: above, scale, property});
|
|
ctx.restore();
|
|
ctx.save();
|
|
clipVertical(ctx, target, area.bottom);
|
|
}
|
|
fill(ctx, {line, target, color: below, scale, property});
|
|
ctx.restore();
|
|
}
|
|
function clipVertical(ctx, target, clipY) {
|
|
const {segments, points} = target;
|
|
let first = true;
|
|
let lineLoop = false;
|
|
ctx.beginPath();
|
|
for (const segment of segments) {
|
|
const {start, end} = segment;
|
|
const firstPoint = points[start];
|
|
const lastPoint = points[_findSegmentEnd(start, end, points)];
|
|
if (first) {
|
|
ctx.moveTo(firstPoint.x, firstPoint.y);
|
|
first = false;
|
|
} else {
|
|
ctx.lineTo(firstPoint.x, clipY);
|
|
ctx.lineTo(firstPoint.x, firstPoint.y);
|
|
}
|
|
lineLoop = !!target.pathSegment(ctx, segment, {move: lineLoop});
|
|
if (lineLoop) {
|
|
ctx.closePath();
|
|
} else {
|
|
ctx.lineTo(lastPoint.x, clipY);
|
|
}
|
|
}
|
|
ctx.lineTo(target.first().x, clipY);
|
|
ctx.closePath();
|
|
ctx.clip();
|
|
}
|
|
function fill(ctx, cfg) {
|
|
const {line, target, property, color, scale} = cfg;
|
|
const segments = _segments(line, target, property);
|
|
for (const {source: src, target: tgt, start, end} of segments) {
|
|
const {style: {backgroundColor = color} = {}} = src;
|
|
const notShape = target !== true;
|
|
ctx.save();
|
|
ctx.fillStyle = backgroundColor;
|
|
clipBounds(ctx, scale, notShape && _getBounds(property, start, end));
|
|
ctx.beginPath();
|
|
const lineLoop = !!line.pathSegment(ctx, src);
|
|
let loop;
|
|
if (notShape) {
|
|
if (lineLoop) {
|
|
ctx.closePath();
|
|
} else {
|
|
interpolatedLineTo(ctx, target, end, property);
|
|
}
|
|
const targetLoop = !!target.pathSegment(ctx, tgt, {move: lineLoop, reverse: true});
|
|
loop = lineLoop && targetLoop;
|
|
if (!loop) {
|
|
interpolatedLineTo(ctx, target, start, property);
|
|
}
|
|
}
|
|
ctx.closePath();
|
|
ctx.fill(loop ? 'evenodd' : 'nonzero');
|
|
ctx.restore();
|
|
}
|
|
}
|
|
function clipBounds(ctx, scale, bounds) {
|
|
const {top, bottom} = scale.chart.chartArea;
|
|
const {property, start, end} = bounds || {};
|
|
if (property === 'x') {
|
|
ctx.beginPath();
|
|
ctx.rect(start, top, end - start, bottom - top);
|
|
ctx.clip();
|
|
}
|
|
}
|
|
function interpolatedLineTo(ctx, target, point, property) {
|
|
const interpolatedPoint = target.interpolate(point, property);
|
|
if (interpolatedPoint) {
|
|
ctx.lineTo(interpolatedPoint.x, interpolatedPoint.y);
|
|
}
|
|
}
|
|
|
|
var index = {
|
|
id: 'filler',
|
|
afterDatasetsUpdate(chart, _args, options) {
|
|
const count = (chart.data.datasets || []).length;
|
|
const sources = [];
|
|
let meta, i, line, source;
|
|
for (i = 0; i < count; ++i) {
|
|
meta = chart.getDatasetMeta(i);
|
|
line = meta.dataset;
|
|
source = null;
|
|
if (line && line.options && line instanceof LineElement) {
|
|
source = {
|
|
visible: chart.isDatasetVisible(i),
|
|
index: i,
|
|
fill: _decodeFill(line, i, count),
|
|
chart,
|
|
axis: meta.controller.options.indexAxis,
|
|
scale: meta.vScale,
|
|
line,
|
|
};
|
|
}
|
|
meta.$filler = source;
|
|
sources.push(source);
|
|
}
|
|
for (i = 0; i < count; ++i) {
|
|
source = sources[i];
|
|
if (!source || source.fill === false) {
|
|
continue;
|
|
}
|
|
source.fill = _resolveTarget(sources, i, options.propagate);
|
|
}
|
|
},
|
|
beforeDraw(chart, _args, options) {
|
|
const draw = options.drawTime === 'beforeDraw';
|
|
const metasets = chart.getSortedVisibleDatasetMetas();
|
|
const area = chart.chartArea;
|
|
for (let i = metasets.length - 1; i >= 0; --i) {
|
|
const source = metasets[i].$filler;
|
|
if (!source) {
|
|
continue;
|
|
}
|
|
source.line.updateControlPoints(area, source.axis);
|
|
if (draw && source.fill) {
|
|
_drawfill(chart.ctx, source, area);
|
|
}
|
|
}
|
|
},
|
|
beforeDatasetsDraw(chart, _args, options) {
|
|
if (options.drawTime !== 'beforeDatasetsDraw') {
|
|
return;
|
|
}
|
|
const metasets = chart.getSortedVisibleDatasetMetas();
|
|
for (let i = metasets.length - 1; i >= 0; --i) {
|
|
const source = metasets[i].$filler;
|
|
if (_shouldApplyFill(source)) {
|
|
_drawfill(chart.ctx, source, chart.chartArea);
|
|
}
|
|
}
|
|
},
|
|
beforeDatasetDraw(chart, args, options) {
|
|
const source = args.meta.$filler;
|
|
if (!_shouldApplyFill(source) || options.drawTime !== 'beforeDatasetDraw') {
|
|
return;
|
|
}
|
|
_drawfill(chart.ctx, source, chart.chartArea);
|
|
},
|
|
defaults: {
|
|
propagate: true,
|
|
drawTime: 'beforeDatasetDraw'
|
|
}
|
|
};
|
|
|
|
const getBoxSize = (labelOpts, fontSize) => {
|
|
let {boxHeight = fontSize, boxWidth = fontSize} = labelOpts;
|
|
if (labelOpts.usePointStyle) {
|
|
boxHeight = Math.min(boxHeight, fontSize);
|
|
boxWidth = labelOpts.pointStyleWidth || Math.min(boxWidth, fontSize);
|
|
}
|
|
return {
|
|
boxWidth,
|
|
boxHeight,
|
|
itemHeight: Math.max(fontSize, boxHeight)
|
|
};
|
|
};
|
|
const itemsEqual = (a, b) => a !== null && b !== null && a.datasetIndex === b.datasetIndex && a.index === b.index;
|
|
class Legend extends Element {
|
|
constructor(config) {
|
|
super();
|
|
this._added = false;
|
|
this.legendHitBoxes = [];
|
|
this._hoveredItem = null;
|
|
this.doughnutMode = false;
|
|
this.chart = config.chart;
|
|
this.options = config.options;
|
|
this.ctx = config.ctx;
|
|
this.legendItems = undefined;
|
|
this.columnSizes = undefined;
|
|
this.lineWidths = undefined;
|
|
this.maxHeight = undefined;
|
|
this.maxWidth = undefined;
|
|
this.top = undefined;
|
|
this.bottom = undefined;
|
|
this.left = undefined;
|
|
this.right = undefined;
|
|
this.height = undefined;
|
|
this.width = undefined;
|
|
this._margins = undefined;
|
|
this.position = undefined;
|
|
this.weight = undefined;
|
|
this.fullSize = undefined;
|
|
}
|
|
update(maxWidth, maxHeight, margins) {
|
|
this.maxWidth = maxWidth;
|
|
this.maxHeight = maxHeight;
|
|
this._margins = margins;
|
|
this.setDimensions();
|
|
this.buildLabels();
|
|
this.fit();
|
|
}
|
|
setDimensions() {
|
|
if (this.isHorizontal()) {
|
|
this.width = this.maxWidth;
|
|
this.left = this._margins.left;
|
|
this.right = this.width;
|
|
} else {
|
|
this.height = this.maxHeight;
|
|
this.top = this._margins.top;
|
|
this.bottom = this.height;
|
|
}
|
|
}
|
|
buildLabels() {
|
|
const labelOpts = this.options.labels || {};
|
|
let legendItems = callback(labelOpts.generateLabels, [this.chart], this) || [];
|
|
if (labelOpts.filter) {
|
|
legendItems = legendItems.filter((item) => labelOpts.filter(item, this.chart.data));
|
|
}
|
|
if (labelOpts.sort) {
|
|
legendItems = legendItems.sort((a, b) => labelOpts.sort(a, b, this.chart.data));
|
|
}
|
|
if (this.options.reverse) {
|
|
legendItems.reverse();
|
|
}
|
|
this.legendItems = legendItems;
|
|
}
|
|
fit() {
|
|
const {options, ctx} = this;
|
|
if (!options.display) {
|
|
this.width = this.height = 0;
|
|
return;
|
|
}
|
|
const labelOpts = options.labels;
|
|
const labelFont = toFont(labelOpts.font);
|
|
const fontSize = labelFont.size;
|
|
const titleHeight = this._computeTitleHeight();
|
|
const {boxWidth, itemHeight} = getBoxSize(labelOpts, fontSize);
|
|
let width, height;
|
|
ctx.font = labelFont.string;
|
|
if (this.isHorizontal()) {
|
|
width = this.maxWidth;
|
|
height = this._fitRows(titleHeight, fontSize, boxWidth, itemHeight) + 10;
|
|
} else {
|
|
height = this.maxHeight;
|
|
width = this._fitCols(titleHeight, fontSize, boxWidth, itemHeight) + 10;
|
|
}
|
|
this.width = Math.min(width, options.maxWidth || this.maxWidth);
|
|
this.height = Math.min(height, options.maxHeight || this.maxHeight);
|
|
}
|
|
_fitRows(titleHeight, fontSize, boxWidth, itemHeight) {
|
|
const {ctx, maxWidth, options: {labels: {padding}}} = this;
|
|
const hitboxes = this.legendHitBoxes = [];
|
|
const lineWidths = this.lineWidths = [0];
|
|
const lineHeight = itemHeight + padding;
|
|
let totalHeight = titleHeight;
|
|
ctx.textAlign = 'left';
|
|
ctx.textBaseline = 'middle';
|
|
let row = -1;
|
|
let top = -lineHeight;
|
|
this.legendItems.forEach((legendItem, i) => {
|
|
const itemWidth = boxWidth + (fontSize / 2) + ctx.measureText(legendItem.text).width;
|
|
if (i === 0 || lineWidths[lineWidths.length - 1] + itemWidth + 2 * padding > maxWidth) {
|
|
totalHeight += lineHeight;
|
|
lineWidths[lineWidths.length - (i > 0 ? 0 : 1)] = 0;
|
|
top += lineHeight;
|
|
row++;
|
|
}
|
|
hitboxes[i] = {left: 0, top, row, width: itemWidth, height: itemHeight};
|
|
lineWidths[lineWidths.length - 1] += itemWidth + padding;
|
|
});
|
|
return totalHeight;
|
|
}
|
|
_fitCols(titleHeight, fontSize, boxWidth, itemHeight) {
|
|
const {ctx, maxHeight, options: {labels: {padding}}} = this;
|
|
const hitboxes = this.legendHitBoxes = [];
|
|
const columnSizes = this.columnSizes = [];
|
|
const heightLimit = maxHeight - titleHeight;
|
|
let totalWidth = padding;
|
|
let currentColWidth = 0;
|
|
let currentColHeight = 0;
|
|
let left = 0;
|
|
let col = 0;
|
|
this.legendItems.forEach((legendItem, i) => {
|
|
const itemWidth = boxWidth + (fontSize / 2) + ctx.measureText(legendItem.text).width;
|
|
if (i > 0 && currentColHeight + itemHeight + 2 * padding > heightLimit) {
|
|
totalWidth += currentColWidth + padding;
|
|
columnSizes.push({width: currentColWidth, height: currentColHeight});
|
|
left += currentColWidth + padding;
|
|
col++;
|
|
currentColWidth = currentColHeight = 0;
|
|
}
|
|
hitboxes[i] = {left, top: currentColHeight, col, width: itemWidth, height: itemHeight};
|
|
currentColWidth = Math.max(currentColWidth, itemWidth);
|
|
currentColHeight += itemHeight + padding;
|
|
});
|
|
totalWidth += currentColWidth;
|
|
columnSizes.push({width: currentColWidth, height: currentColHeight});
|
|
return totalWidth;
|
|
}
|
|
adjustHitBoxes() {
|
|
if (!this.options.display) {
|
|
return;
|
|
}
|
|
const titleHeight = this._computeTitleHeight();
|
|
const {legendHitBoxes: hitboxes, options: {align, labels: {padding}, rtl}} = this;
|
|
const rtlHelper = getRtlAdapter(rtl, this.left, this.width);
|
|
if (this.isHorizontal()) {
|
|
let row = 0;
|
|
let left = _alignStartEnd(align, this.left + padding, this.right - this.lineWidths[row]);
|
|
for (const hitbox of hitboxes) {
|
|
if (row !== hitbox.row) {
|
|
row = hitbox.row;
|
|
left = _alignStartEnd(align, this.left + padding, this.right - this.lineWidths[row]);
|
|
}
|
|
hitbox.top += this.top + titleHeight + padding;
|
|
hitbox.left = rtlHelper.leftForLtr(rtlHelper.x(left), hitbox.width);
|
|
left += hitbox.width + padding;
|
|
}
|
|
} else {
|
|
let col = 0;
|
|
let top = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - this.columnSizes[col].height);
|
|
for (const hitbox of hitboxes) {
|
|
if (hitbox.col !== col) {
|
|
col = hitbox.col;
|
|
top = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - this.columnSizes[col].height);
|
|
}
|
|
hitbox.top = top;
|
|
hitbox.left += this.left + padding;
|
|
hitbox.left = rtlHelper.leftForLtr(rtlHelper.x(hitbox.left), hitbox.width);
|
|
top += hitbox.height + padding;
|
|
}
|
|
}
|
|
}
|
|
isHorizontal() {
|
|
return this.options.position === 'top' || this.options.position === 'bottom';
|
|
}
|
|
draw() {
|
|
if (this.options.display) {
|
|
const ctx = this.ctx;
|
|
clipArea(ctx, this);
|
|
this._draw();
|
|
unclipArea(ctx);
|
|
}
|
|
}
|
|
_draw() {
|
|
const {options: opts, columnSizes, lineWidths, ctx} = this;
|
|
const {align, labels: labelOpts} = opts;
|
|
const defaultColor = defaults.color;
|
|
const rtlHelper = getRtlAdapter(opts.rtl, this.left, this.width);
|
|
const labelFont = toFont(labelOpts.font);
|
|
const {color: fontColor, padding} = labelOpts;
|
|
const fontSize = labelFont.size;
|
|
const halfFontSize = fontSize / 2;
|
|
let cursor;
|
|
this.drawTitle();
|
|
ctx.textAlign = rtlHelper.textAlign('left');
|
|
ctx.textBaseline = 'middle';
|
|
ctx.lineWidth = 0.5;
|
|
ctx.font = labelFont.string;
|
|
const {boxWidth, boxHeight, itemHeight} = getBoxSize(labelOpts, fontSize);
|
|
const drawLegendBox = function(x, y, legendItem) {
|
|
if (isNaN(boxWidth) || boxWidth <= 0 || isNaN(boxHeight) || boxHeight < 0) {
|
|
return;
|
|
}
|
|
ctx.save();
|
|
const lineWidth = valueOrDefault(legendItem.lineWidth, 1);
|
|
ctx.fillStyle = valueOrDefault(legendItem.fillStyle, defaultColor);
|
|
ctx.lineCap = valueOrDefault(legendItem.lineCap, 'butt');
|
|
ctx.lineDashOffset = valueOrDefault(legendItem.lineDashOffset, 0);
|
|
ctx.lineJoin = valueOrDefault(legendItem.lineJoin, 'miter');
|
|
ctx.lineWidth = lineWidth;
|
|
ctx.strokeStyle = valueOrDefault(legendItem.strokeStyle, defaultColor);
|
|
ctx.setLineDash(valueOrDefault(legendItem.lineDash, []));
|
|
if (labelOpts.usePointStyle) {
|
|
const drawOptions = {
|
|
radius: boxHeight * Math.SQRT2 / 2,
|
|
pointStyle: legendItem.pointStyle,
|
|
rotation: legendItem.rotation,
|
|
borderWidth: lineWidth
|
|
};
|
|
const centerX = rtlHelper.xPlus(x, boxWidth / 2);
|
|
const centerY = y + halfFontSize;
|
|
drawPointLegend(ctx, drawOptions, centerX, centerY, labelOpts.pointStyleWidth && boxWidth);
|
|
} else {
|
|
const yBoxTop = y + Math.max((fontSize - boxHeight) / 2, 0);
|
|
const xBoxLeft = rtlHelper.leftForLtr(x, boxWidth);
|
|
const borderRadius = toTRBLCorners(legendItem.borderRadius);
|
|
ctx.beginPath();
|
|
if (Object.values(borderRadius).some(v => v !== 0)) {
|
|
addRoundedRectPath(ctx, {
|
|
x: xBoxLeft,
|
|
y: yBoxTop,
|
|
w: boxWidth,
|
|
h: boxHeight,
|
|
radius: borderRadius,
|
|
});
|
|
} else {
|
|
ctx.rect(xBoxLeft, yBoxTop, boxWidth, boxHeight);
|
|
}
|
|
ctx.fill();
|
|
if (lineWidth !== 0) {
|
|
ctx.stroke();
|
|
}
|
|
}
|
|
ctx.restore();
|
|
};
|
|
const fillText = function(x, y, legendItem) {
|
|
renderText(ctx, legendItem.text, x, y + (itemHeight / 2), labelFont, {
|
|
strikethrough: legendItem.hidden,
|
|
textAlign: rtlHelper.textAlign(legendItem.textAlign)
|
|
});
|
|
};
|
|
const isHorizontal = this.isHorizontal();
|
|
const titleHeight = this._computeTitleHeight();
|
|
if (isHorizontal) {
|
|
cursor = {
|
|
x: _alignStartEnd(align, this.left + padding, this.right - lineWidths[0]),
|
|
y: this.top + padding + titleHeight,
|
|
line: 0
|
|
};
|
|
} else {
|
|
cursor = {
|
|
x: this.left + padding,
|
|
y: _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - columnSizes[0].height),
|
|
line: 0
|
|
};
|
|
}
|
|
overrideTextDirection(this.ctx, opts.textDirection);
|
|
const lineHeight = itemHeight + padding;
|
|
this.legendItems.forEach((legendItem, i) => {
|
|
ctx.strokeStyle = legendItem.fontColor || fontColor;
|
|
ctx.fillStyle = legendItem.fontColor || fontColor;
|
|
const textWidth = ctx.measureText(legendItem.text).width;
|
|
const textAlign = rtlHelper.textAlign(legendItem.textAlign || (legendItem.textAlign = labelOpts.textAlign));
|
|
const width = boxWidth + halfFontSize + textWidth;
|
|
let x = cursor.x;
|
|
let y = cursor.y;
|
|
rtlHelper.setWidth(this.width);
|
|
if (isHorizontal) {
|
|
if (i > 0 && x + width + padding > this.right) {
|
|
y = cursor.y += lineHeight;
|
|
cursor.line++;
|
|
x = cursor.x = _alignStartEnd(align, this.left + padding, this.right - lineWidths[cursor.line]);
|
|
}
|
|
} else if (i > 0 && y + lineHeight > this.bottom) {
|
|
x = cursor.x = x + columnSizes[cursor.line].width + padding;
|
|
cursor.line++;
|
|
y = cursor.y = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - columnSizes[cursor.line].height);
|
|
}
|
|
const realX = rtlHelper.x(x);
|
|
drawLegendBox(realX, y, legendItem);
|
|
x = _textX(textAlign, x + boxWidth + halfFontSize, isHorizontal ? x + width : this.right, opts.rtl);
|
|
fillText(rtlHelper.x(x), y, legendItem);
|
|
if (isHorizontal) {
|
|
cursor.x += width + padding;
|
|
} else {
|
|
cursor.y += lineHeight;
|
|
}
|
|
});
|
|
restoreTextDirection(this.ctx, opts.textDirection);
|
|
}
|
|
drawTitle() {
|
|
const opts = this.options;
|
|
const titleOpts = opts.title;
|
|
const titleFont = toFont(titleOpts.font);
|
|
const titlePadding = toPadding(titleOpts.padding);
|
|
if (!titleOpts.display) {
|
|
return;
|
|
}
|
|
const rtlHelper = getRtlAdapter(opts.rtl, this.left, this.width);
|
|
const ctx = this.ctx;
|
|
const position = titleOpts.position;
|
|
const halfFontSize = titleFont.size / 2;
|
|
const topPaddingPlusHalfFontSize = titlePadding.top + halfFontSize;
|
|
let y;
|
|
let left = this.left;
|
|
let maxWidth = this.width;
|
|
if (this.isHorizontal()) {
|
|
maxWidth = Math.max(...this.lineWidths);
|
|
y = this.top + topPaddingPlusHalfFontSize;
|
|
left = _alignStartEnd(opts.align, left, this.right - maxWidth);
|
|
} else {
|
|
const maxHeight = this.columnSizes.reduce((acc, size) => Math.max(acc, size.height), 0);
|
|
y = topPaddingPlusHalfFontSize + _alignStartEnd(opts.align, this.top, this.bottom - maxHeight - opts.labels.padding - this._computeTitleHeight());
|
|
}
|
|
const x = _alignStartEnd(position, left, left + maxWidth);
|
|
ctx.textAlign = rtlHelper.textAlign(_toLeftRightCenter(position));
|
|
ctx.textBaseline = 'middle';
|
|
ctx.strokeStyle = titleOpts.color;
|
|
ctx.fillStyle = titleOpts.color;
|
|
ctx.font = titleFont.string;
|
|
renderText(ctx, titleOpts.text, x, y, titleFont);
|
|
}
|
|
_computeTitleHeight() {
|
|
const titleOpts = this.options.title;
|
|
const titleFont = toFont(titleOpts.font);
|
|
const titlePadding = toPadding(titleOpts.padding);
|
|
return titleOpts.display ? titleFont.lineHeight + titlePadding.height : 0;
|
|
}
|
|
_getLegendItemAt(x, y) {
|
|
let i, hitBox, lh;
|
|
if (_isBetween(x, this.left, this.right)
|
|
&& _isBetween(y, this.top, this.bottom)) {
|
|
lh = this.legendHitBoxes;
|
|
for (i = 0; i < lh.length; ++i) {
|
|
hitBox = lh[i];
|
|
if (_isBetween(x, hitBox.left, hitBox.left + hitBox.width)
|
|
&& _isBetween(y, hitBox.top, hitBox.top + hitBox.height)) {
|
|
return this.legendItems[i];
|
|
}
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
handleEvent(e) {
|
|
const opts = this.options;
|
|
if (!isListened(e.type, opts)) {
|
|
return;
|
|
}
|
|
const hoveredItem = this._getLegendItemAt(e.x, e.y);
|
|
if (e.type === 'mousemove' || e.type === 'mouseout') {
|
|
const previous = this._hoveredItem;
|
|
const sameItem = itemsEqual(previous, hoveredItem);
|
|
if (previous && !sameItem) {
|
|
callback(opts.onLeave, [e, previous, this], this);
|
|
}
|
|
this._hoveredItem = hoveredItem;
|
|
if (hoveredItem && !sameItem) {
|
|
callback(opts.onHover, [e, hoveredItem, this], this);
|
|
}
|
|
} else if (hoveredItem) {
|
|
callback(opts.onClick, [e, hoveredItem, this], this);
|
|
}
|
|
}
|
|
}
|
|
function isListened(type, opts) {
|
|
if ((type === 'mousemove' || type === 'mouseout') && (opts.onHover || opts.onLeave)) {
|
|
return true;
|
|
}
|
|
if (opts.onClick && (type === 'click' || type === 'mouseup')) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
var plugin_legend = {
|
|
id: 'legend',
|
|
_element: Legend,
|
|
start(chart, _args, options) {
|
|
const legend = chart.legend = new Legend({ctx: chart.ctx, options, chart});
|
|
layouts.configure(chart, legend, options);
|
|
layouts.addBox(chart, legend);
|
|
},
|
|
stop(chart) {
|
|
layouts.removeBox(chart, chart.legend);
|
|
delete chart.legend;
|
|
},
|
|
beforeUpdate(chart, _args, options) {
|
|
const legend = chart.legend;
|
|
layouts.configure(chart, legend, options);
|
|
legend.options = options;
|
|
},
|
|
afterUpdate(chart) {
|
|
const legend = chart.legend;
|
|
legend.buildLabels();
|
|
legend.adjustHitBoxes();
|
|
},
|
|
afterEvent(chart, args) {
|
|
if (!args.replay) {
|
|
chart.legend.handleEvent(args.event);
|
|
}
|
|
},
|
|
defaults: {
|
|
display: true,
|
|
position: 'top',
|
|
align: 'center',
|
|
fullSize: true,
|
|
reverse: false,
|
|
weight: 1000,
|
|
onClick(e, legendItem, legend) {
|
|
const index = legendItem.datasetIndex;
|
|
const ci = legend.chart;
|
|
if (ci.isDatasetVisible(index)) {
|
|
ci.hide(index);
|
|
legendItem.hidden = true;
|
|
} else {
|
|
ci.show(index);
|
|
legendItem.hidden = false;
|
|
}
|
|
},
|
|
onHover: null,
|
|
onLeave: null,
|
|
labels: {
|
|
color: (ctx) => ctx.chart.options.color,
|
|
boxWidth: 40,
|
|
padding: 10,
|
|
generateLabels(chart) {
|
|
const datasets = chart.data.datasets;
|
|
const {labels: {usePointStyle, pointStyle, textAlign, color}} = chart.legend.options;
|
|
return chart._getSortedDatasetMetas().map((meta) => {
|
|
const style = meta.controller.getStyle(usePointStyle ? 0 : undefined);
|
|
const borderWidth = toPadding(style.borderWidth);
|
|
return {
|
|
text: datasets[meta.index].label,
|
|
fillStyle: style.backgroundColor,
|
|
fontColor: color,
|
|
hidden: !meta.visible,
|
|
lineCap: style.borderCapStyle,
|
|
lineDash: style.borderDash,
|
|
lineDashOffset: style.borderDashOffset,
|
|
lineJoin: style.borderJoinStyle,
|
|
lineWidth: (borderWidth.width + borderWidth.height) / 4,
|
|
strokeStyle: style.borderColor,
|
|
pointStyle: pointStyle || style.pointStyle,
|
|
rotation: style.rotation,
|
|
textAlign: textAlign || style.textAlign,
|
|
borderRadius: 0,
|
|
datasetIndex: meta.index
|
|
};
|
|
}, this);
|
|
}
|
|
},
|
|
title: {
|
|
color: (ctx) => ctx.chart.options.color,
|
|
display: false,
|
|
position: 'center',
|
|
text: '',
|
|
}
|
|
},
|
|
descriptors: {
|
|
_scriptable: (name) => !name.startsWith('on'),
|
|
labels: {
|
|
_scriptable: (name) => !['generateLabels', 'filter', 'sort'].includes(name),
|
|
}
|
|
},
|
|
};
|
|
|
|
class Title extends Element {
|
|
constructor(config) {
|
|
super();
|
|
this.chart = config.chart;
|
|
this.options = config.options;
|
|
this.ctx = config.ctx;
|
|
this._padding = undefined;
|
|
this.top = undefined;
|
|
this.bottom = undefined;
|
|
this.left = undefined;
|
|
this.right = undefined;
|
|
this.width = undefined;
|
|
this.height = undefined;
|
|
this.position = undefined;
|
|
this.weight = undefined;
|
|
this.fullSize = undefined;
|
|
}
|
|
update(maxWidth, maxHeight) {
|
|
const opts = this.options;
|
|
this.left = 0;
|
|
this.top = 0;
|
|
if (!opts.display) {
|
|
this.width = this.height = this.right = this.bottom = 0;
|
|
return;
|
|
}
|
|
this.width = this.right = maxWidth;
|
|
this.height = this.bottom = maxHeight;
|
|
const lineCount = isArray(opts.text) ? opts.text.length : 1;
|
|
this._padding = toPadding(opts.padding);
|
|
const textSize = lineCount * toFont(opts.font).lineHeight + this._padding.height;
|
|
if (this.isHorizontal()) {
|
|
this.height = textSize;
|
|
} else {
|
|
this.width = textSize;
|
|
}
|
|
}
|
|
isHorizontal() {
|
|
const pos = this.options.position;
|
|
return pos === 'top' || pos === 'bottom';
|
|
}
|
|
_drawArgs(offset) {
|
|
const {top, left, bottom, right, options} = this;
|
|
const align = options.align;
|
|
let rotation = 0;
|
|
let maxWidth, titleX, titleY;
|
|
if (this.isHorizontal()) {
|
|
titleX = _alignStartEnd(align, left, right);
|
|
titleY = top + offset;
|
|
maxWidth = right - left;
|
|
} else {
|
|
if (options.position === 'left') {
|
|
titleX = left + offset;
|
|
titleY = _alignStartEnd(align, bottom, top);
|
|
rotation = PI * -0.5;
|
|
} else {
|
|
titleX = right - offset;
|
|
titleY = _alignStartEnd(align, top, bottom);
|
|
rotation = PI * 0.5;
|
|
}
|
|
maxWidth = bottom - top;
|
|
}
|
|
return {titleX, titleY, maxWidth, rotation};
|
|
}
|
|
draw() {
|
|
const ctx = this.ctx;
|
|
const opts = this.options;
|
|
if (!opts.display) {
|
|
return;
|
|
}
|
|
const fontOpts = toFont(opts.font);
|
|
const lineHeight = fontOpts.lineHeight;
|
|
const offset = lineHeight / 2 + this._padding.top;
|
|
const {titleX, titleY, maxWidth, rotation} = this._drawArgs(offset);
|
|
renderText(ctx, opts.text, 0, 0, fontOpts, {
|
|
color: opts.color,
|
|
maxWidth,
|
|
rotation,
|
|
textAlign: _toLeftRightCenter(opts.align),
|
|
textBaseline: 'middle',
|
|
translation: [titleX, titleY],
|
|
});
|
|
}
|
|
}
|
|
function createTitle(chart, titleOpts) {
|
|
const title = new Title({
|
|
ctx: chart.ctx,
|
|
options: titleOpts,
|
|
chart
|
|
});
|
|
layouts.configure(chart, title, titleOpts);
|
|
layouts.addBox(chart, title);
|
|
chart.titleBlock = title;
|
|
}
|
|
var plugin_title = {
|
|
id: 'title',
|
|
_element: Title,
|
|
start(chart, _args, options) {
|
|
createTitle(chart, options);
|
|
},
|
|
stop(chart) {
|
|
const titleBlock = chart.titleBlock;
|
|
layouts.removeBox(chart, titleBlock);
|
|
delete chart.titleBlock;
|
|
},
|
|
beforeUpdate(chart, _args, options) {
|
|
const title = chart.titleBlock;
|
|
layouts.configure(chart, title, options);
|
|
title.options = options;
|
|
},
|
|
defaults: {
|
|
align: 'center',
|
|
display: false,
|
|
font: {
|
|
weight: 'bold',
|
|
},
|
|
fullSize: true,
|
|
padding: 10,
|
|
position: 'top',
|
|
text: '',
|
|
weight: 2000
|
|
},
|
|
defaultRoutes: {
|
|
color: 'color'
|
|
},
|
|
descriptors: {
|
|
_scriptable: true,
|
|
_indexable: false,
|
|
},
|
|
};
|
|
|
|
const map = new WeakMap();
|
|
var plugin_subtitle = {
|
|
id: 'subtitle',
|
|
start(chart, _args, options) {
|
|
const title = new Title({
|
|
ctx: chart.ctx,
|
|
options,
|
|
chart
|
|
});
|
|
layouts.configure(chart, title, options);
|
|
layouts.addBox(chart, title);
|
|
map.set(chart, title);
|
|
},
|
|
stop(chart) {
|
|
layouts.removeBox(chart, map.get(chart));
|
|
map.delete(chart);
|
|
},
|
|
beforeUpdate(chart, _args, options) {
|
|
const title = map.get(chart);
|
|
layouts.configure(chart, title, options);
|
|
title.options = options;
|
|
},
|
|
defaults: {
|
|
align: 'center',
|
|
display: false,
|
|
font: {
|
|
weight: 'normal',
|
|
},
|
|
fullSize: true,
|
|
padding: 0,
|
|
position: 'top',
|
|
text: '',
|
|
weight: 1500
|
|
},
|
|
defaultRoutes: {
|
|
color: 'color'
|
|
},
|
|
descriptors: {
|
|
_scriptable: true,
|
|
_indexable: false,
|
|
},
|
|
};
|
|
|
|
const positioners = {
|
|
average(items) {
|
|
if (!items.length) {
|
|
return false;
|
|
}
|
|
let i, len;
|
|
let x = 0;
|
|
let y = 0;
|
|
let count = 0;
|
|
for (i = 0, len = items.length; i < len; ++i) {
|
|
const el = items[i].element;
|
|
if (el && el.hasValue()) {
|
|
const pos = el.tooltipPosition();
|
|
x += pos.x;
|
|
y += pos.y;
|
|
++count;
|
|
}
|
|
}
|
|
return {
|
|
x: x / count,
|
|
y: y / count
|
|
};
|
|
},
|
|
nearest(items, eventPosition) {
|
|
if (!items.length) {
|
|
return false;
|
|
}
|
|
let x = eventPosition.x;
|
|
let y = eventPosition.y;
|
|
let minDistance = Number.POSITIVE_INFINITY;
|
|
let i, len, nearestElement;
|
|
for (i = 0, len = items.length; i < len; ++i) {
|
|
const el = items[i].element;
|
|
if (el && el.hasValue()) {
|
|
const center = el.getCenterPoint();
|
|
const d = distanceBetweenPoints(eventPosition, center);
|
|
if (d < minDistance) {
|
|
minDistance = d;
|
|
nearestElement = el;
|
|
}
|
|
}
|
|
}
|
|
if (nearestElement) {
|
|
const tp = nearestElement.tooltipPosition();
|
|
x = tp.x;
|
|
y = tp.y;
|
|
}
|
|
return {
|
|
x,
|
|
y
|
|
};
|
|
}
|
|
};
|
|
function pushOrConcat(base, toPush) {
|
|
if (toPush) {
|
|
if (isArray(toPush)) {
|
|
Array.prototype.push.apply(base, toPush);
|
|
} else {
|
|
base.push(toPush);
|
|
}
|
|
}
|
|
return base;
|
|
}
|
|
function splitNewlines(str) {
|
|
if ((typeof str === 'string' || str instanceof String) && str.indexOf('\n') > -1) {
|
|
return str.split('\n');
|
|
}
|
|
return str;
|
|
}
|
|
function createTooltipItem(chart, item) {
|
|
const {element, datasetIndex, index} = item;
|
|
const controller = chart.getDatasetMeta(datasetIndex).controller;
|
|
const {label, value} = controller.getLabelAndValue(index);
|
|
return {
|
|
chart,
|
|
label,
|
|
parsed: controller.getParsed(index),
|
|
raw: chart.data.datasets[datasetIndex].data[index],
|
|
formattedValue: value,
|
|
dataset: controller.getDataset(),
|
|
dataIndex: index,
|
|
datasetIndex,
|
|
element
|
|
};
|
|
}
|
|
function getTooltipSize(tooltip, options) {
|
|
const ctx = tooltip.chart.ctx;
|
|
const {body, footer, title} = tooltip;
|
|
const {boxWidth, boxHeight} = options;
|
|
const bodyFont = toFont(options.bodyFont);
|
|
const titleFont = toFont(options.titleFont);
|
|
const footerFont = toFont(options.footerFont);
|
|
const titleLineCount = title.length;
|
|
const footerLineCount = footer.length;
|
|
const bodyLineItemCount = body.length;
|
|
const padding = toPadding(options.padding);
|
|
let height = padding.height;
|
|
let width = 0;
|
|
let combinedBodyLength = body.reduce((count, bodyItem) => count + bodyItem.before.length + bodyItem.lines.length + bodyItem.after.length, 0);
|
|
combinedBodyLength += tooltip.beforeBody.length + tooltip.afterBody.length;
|
|
if (titleLineCount) {
|
|
height += titleLineCount * titleFont.lineHeight
|
|
+ (titleLineCount - 1) * options.titleSpacing
|
|
+ options.titleMarginBottom;
|
|
}
|
|
if (combinedBodyLength) {
|
|
const bodyLineHeight = options.displayColors ? Math.max(boxHeight, bodyFont.lineHeight) : bodyFont.lineHeight;
|
|
height += bodyLineItemCount * bodyLineHeight
|
|
+ (combinedBodyLength - bodyLineItemCount) * bodyFont.lineHeight
|
|
+ (combinedBodyLength - 1) * options.bodySpacing;
|
|
}
|
|
if (footerLineCount) {
|
|
height += options.footerMarginTop
|
|
+ footerLineCount * footerFont.lineHeight
|
|
+ (footerLineCount - 1) * options.footerSpacing;
|
|
}
|
|
let widthPadding = 0;
|
|
const maxLineWidth = function(line) {
|
|
width = Math.max(width, ctx.measureText(line).width + widthPadding);
|
|
};
|
|
ctx.save();
|
|
ctx.font = titleFont.string;
|
|
each(tooltip.title, maxLineWidth);
|
|
ctx.font = bodyFont.string;
|
|
each(tooltip.beforeBody.concat(tooltip.afterBody), maxLineWidth);
|
|
widthPadding = options.displayColors ? (boxWidth + 2 + options.boxPadding) : 0;
|
|
each(body, (bodyItem) => {
|
|
each(bodyItem.before, maxLineWidth);
|
|
each(bodyItem.lines, maxLineWidth);
|
|
each(bodyItem.after, maxLineWidth);
|
|
});
|
|
widthPadding = 0;
|
|
ctx.font = footerFont.string;
|
|
each(tooltip.footer, maxLineWidth);
|
|
ctx.restore();
|
|
width += padding.width;
|
|
return {width, height};
|
|
}
|
|
function determineYAlign(chart, size) {
|
|
const {y, height} = size;
|
|
if (y < height / 2) {
|
|
return 'top';
|
|
} else if (y > (chart.height - height / 2)) {
|
|
return 'bottom';
|
|
}
|
|
return 'center';
|
|
}
|
|
function doesNotFitWithAlign(xAlign, chart, options, size) {
|
|
const {x, width} = size;
|
|
const caret = options.caretSize + options.caretPadding;
|
|
if (xAlign === 'left' && x + width + caret > chart.width) {
|
|
return true;
|
|
}
|
|
if (xAlign === 'right' && x - width - caret < 0) {
|
|
return true;
|
|
}
|
|
}
|
|
function determineXAlign(chart, options, size, yAlign) {
|
|
const {x, width} = size;
|
|
const {width: chartWidth, chartArea: {left, right}} = chart;
|
|
let xAlign = 'center';
|
|
if (yAlign === 'center') {
|
|
xAlign = x <= (left + right) / 2 ? 'left' : 'right';
|
|
} else if (x <= width / 2) {
|
|
xAlign = 'left';
|
|
} else if (x >= chartWidth - width / 2) {
|
|
xAlign = 'right';
|
|
}
|
|
if (doesNotFitWithAlign(xAlign, chart, options, size)) {
|
|
xAlign = 'center';
|
|
}
|
|
return xAlign;
|
|
}
|
|
function determineAlignment(chart, options, size) {
|
|
const yAlign = size.yAlign || options.yAlign || determineYAlign(chart, size);
|
|
return {
|
|
xAlign: size.xAlign || options.xAlign || determineXAlign(chart, options, size, yAlign),
|
|
yAlign
|
|
};
|
|
}
|
|
function alignX(size, xAlign) {
|
|
let {x, width} = size;
|
|
if (xAlign === 'right') {
|
|
x -= width;
|
|
} else if (xAlign === 'center') {
|
|
x -= (width / 2);
|
|
}
|
|
return x;
|
|
}
|
|
function alignY(size, yAlign, paddingAndSize) {
|
|
let {y, height} = size;
|
|
if (yAlign === 'top') {
|
|
y += paddingAndSize;
|
|
} else if (yAlign === 'bottom') {
|
|
y -= height + paddingAndSize;
|
|
} else {
|
|
y -= (height / 2);
|
|
}
|
|
return y;
|
|
}
|
|
function getBackgroundPoint(options, size, alignment, chart) {
|
|
const {caretSize, caretPadding, cornerRadius} = options;
|
|
const {xAlign, yAlign} = alignment;
|
|
const paddingAndSize = caretSize + caretPadding;
|
|
const {topLeft, topRight, bottomLeft, bottomRight} = toTRBLCorners(cornerRadius);
|
|
let x = alignX(size, xAlign);
|
|
const y = alignY(size, yAlign, paddingAndSize);
|
|
if (yAlign === 'center') {
|
|
if (xAlign === 'left') {
|
|
x += paddingAndSize;
|
|
} else if (xAlign === 'right') {
|
|
x -= paddingAndSize;
|
|
}
|
|
} else if (xAlign === 'left') {
|
|
x -= Math.max(topLeft, bottomLeft) + caretSize;
|
|
} else if (xAlign === 'right') {
|
|
x += Math.max(topRight, bottomRight) + caretSize;
|
|
}
|
|
return {
|
|
x: _limitValue(x, 0, chart.width - size.width),
|
|
y: _limitValue(y, 0, chart.height - size.height)
|
|
};
|
|
}
|
|
function getAlignedX(tooltip, align, options) {
|
|
const padding = toPadding(options.padding);
|
|
return align === 'center'
|
|
? tooltip.x + tooltip.width / 2
|
|
: align === 'right'
|
|
? tooltip.x + tooltip.width - padding.right
|
|
: tooltip.x + padding.left;
|
|
}
|
|
function getBeforeAfterBodyLines(callback) {
|
|
return pushOrConcat([], splitNewlines(callback));
|
|
}
|
|
function createTooltipContext(parent, tooltip, tooltipItems) {
|
|
return createContext(parent, {
|
|
tooltip,
|
|
tooltipItems,
|
|
type: 'tooltip'
|
|
});
|
|
}
|
|
function overrideCallbacks(callbacks, context) {
|
|
const override = context && context.dataset && context.dataset.tooltip && context.dataset.tooltip.callbacks;
|
|
return override ? callbacks.override(override) : callbacks;
|
|
}
|
|
class Tooltip extends Element {
|
|
constructor(config) {
|
|
super();
|
|
this.opacity = 0;
|
|
this._active = [];
|
|
this._eventPosition = undefined;
|
|
this._size = undefined;
|
|
this._cachedAnimations = undefined;
|
|
this._tooltipItems = [];
|
|
this.$animations = undefined;
|
|
this.$context = undefined;
|
|
this.chart = config.chart || config._chart;
|
|
this._chart = this.chart;
|
|
this.options = config.options;
|
|
this.dataPoints = undefined;
|
|
this.title = undefined;
|
|
this.beforeBody = undefined;
|
|
this.body = undefined;
|
|
this.afterBody = undefined;
|
|
this.footer = undefined;
|
|
this.xAlign = undefined;
|
|
this.yAlign = undefined;
|
|
this.x = undefined;
|
|
this.y = undefined;
|
|
this.height = undefined;
|
|
this.width = undefined;
|
|
this.caretX = undefined;
|
|
this.caretY = undefined;
|
|
this.labelColors = undefined;
|
|
this.labelPointStyles = undefined;
|
|
this.labelTextColors = undefined;
|
|
}
|
|
initialize(options) {
|
|
this.options = options;
|
|
this._cachedAnimations = undefined;
|
|
this.$context = undefined;
|
|
}
|
|
_resolveAnimations() {
|
|
const cached = this._cachedAnimations;
|
|
if (cached) {
|
|
return cached;
|
|
}
|
|
const chart = this.chart;
|
|
const options = this.options.setContext(this.getContext());
|
|
const opts = options.enabled && chart.options.animation && options.animations;
|
|
const animations = new Animations(this.chart, opts);
|
|
if (opts._cacheable) {
|
|
this._cachedAnimations = Object.freeze(animations);
|
|
}
|
|
return animations;
|
|
}
|
|
getContext() {
|
|
return this.$context ||
|
|
(this.$context = createTooltipContext(this.chart.getContext(), this, this._tooltipItems));
|
|
}
|
|
getTitle(context, options) {
|
|
const {callbacks} = options;
|
|
const beforeTitle = callbacks.beforeTitle.apply(this, [context]);
|
|
const title = callbacks.title.apply(this, [context]);
|
|
const afterTitle = callbacks.afterTitle.apply(this, [context]);
|
|
let lines = [];
|
|
lines = pushOrConcat(lines, splitNewlines(beforeTitle));
|
|
lines = pushOrConcat(lines, splitNewlines(title));
|
|
lines = pushOrConcat(lines, splitNewlines(afterTitle));
|
|
return lines;
|
|
}
|
|
getBeforeBody(tooltipItems, options) {
|
|
return getBeforeAfterBodyLines(options.callbacks.beforeBody.apply(this, [tooltipItems]));
|
|
}
|
|
getBody(tooltipItems, options) {
|
|
const {callbacks} = options;
|
|
const bodyItems = [];
|
|
each(tooltipItems, (context) => {
|
|
const bodyItem = {
|
|
before: [],
|
|
lines: [],
|
|
after: []
|
|
};
|
|
const scoped = overrideCallbacks(callbacks, context);
|
|
pushOrConcat(bodyItem.before, splitNewlines(scoped.beforeLabel.call(this, context)));
|
|
pushOrConcat(bodyItem.lines, scoped.label.call(this, context));
|
|
pushOrConcat(bodyItem.after, splitNewlines(scoped.afterLabel.call(this, context)));
|
|
bodyItems.push(bodyItem);
|
|
});
|
|
return bodyItems;
|
|
}
|
|
getAfterBody(tooltipItems, options) {
|
|
return getBeforeAfterBodyLines(options.callbacks.afterBody.apply(this, [tooltipItems]));
|
|
}
|
|
getFooter(tooltipItems, options) {
|
|
const {callbacks} = options;
|
|
const beforeFooter = callbacks.beforeFooter.apply(this, [tooltipItems]);
|
|
const footer = callbacks.footer.apply(this, [tooltipItems]);
|
|
const afterFooter = callbacks.afterFooter.apply(this, [tooltipItems]);
|
|
let lines = [];
|
|
lines = pushOrConcat(lines, splitNewlines(beforeFooter));
|
|
lines = pushOrConcat(lines, splitNewlines(footer));
|
|
lines = pushOrConcat(lines, splitNewlines(afterFooter));
|
|
return lines;
|
|
}
|
|
_createItems(options) {
|
|
const active = this._active;
|
|
const data = this.chart.data;
|
|
const labelColors = [];
|
|
const labelPointStyles = [];
|
|
const labelTextColors = [];
|
|
let tooltipItems = [];
|
|
let i, len;
|
|
for (i = 0, len = active.length; i < len; ++i) {
|
|
tooltipItems.push(createTooltipItem(this.chart, active[i]));
|
|
}
|
|
if (options.filter) {
|
|
tooltipItems = tooltipItems.filter((element, index, array) => options.filter(element, index, array, data));
|
|
}
|
|
if (options.itemSort) {
|
|
tooltipItems = tooltipItems.sort((a, b) => options.itemSort(a, b, data));
|
|
}
|
|
each(tooltipItems, (context) => {
|
|
const scoped = overrideCallbacks(options.callbacks, context);
|
|
labelColors.push(scoped.labelColor.call(this, context));
|
|
labelPointStyles.push(scoped.labelPointStyle.call(this, context));
|
|
labelTextColors.push(scoped.labelTextColor.call(this, context));
|
|
});
|
|
this.labelColors = labelColors;
|
|
this.labelPointStyles = labelPointStyles;
|
|
this.labelTextColors = labelTextColors;
|
|
this.dataPoints = tooltipItems;
|
|
return tooltipItems;
|
|
}
|
|
update(changed, replay) {
|
|
const options = this.options.setContext(this.getContext());
|
|
const active = this._active;
|
|
let properties;
|
|
let tooltipItems = [];
|
|
if (!active.length) {
|
|
if (this.opacity !== 0) {
|
|
properties = {
|
|
opacity: 0
|
|
};
|
|
}
|
|
} else {
|
|
const position = positioners[options.position].call(this, active, this._eventPosition);
|
|
tooltipItems = this._createItems(options);
|
|
this.title = this.getTitle(tooltipItems, options);
|
|
this.beforeBody = this.getBeforeBody(tooltipItems, options);
|
|
this.body = this.getBody(tooltipItems, options);
|
|
this.afterBody = this.getAfterBody(tooltipItems, options);
|
|
this.footer = this.getFooter(tooltipItems, options);
|
|
const size = this._size = getTooltipSize(this, options);
|
|
const positionAndSize = Object.assign({}, position, size);
|
|
const alignment = determineAlignment(this.chart, options, positionAndSize);
|
|
const backgroundPoint = getBackgroundPoint(options, positionAndSize, alignment, this.chart);
|
|
this.xAlign = alignment.xAlign;
|
|
this.yAlign = alignment.yAlign;
|
|
properties = {
|
|
opacity: 1,
|
|
x: backgroundPoint.x,
|
|
y: backgroundPoint.y,
|
|
width: size.width,
|
|
height: size.height,
|
|
caretX: position.x,
|
|
caretY: position.y
|
|
};
|
|
}
|
|
this._tooltipItems = tooltipItems;
|
|
this.$context = undefined;
|
|
if (properties) {
|
|
this._resolveAnimations().update(this, properties);
|
|
}
|
|
if (changed && options.external) {
|
|
options.external.call(this, {chart: this.chart, tooltip: this, replay});
|
|
}
|
|
}
|
|
drawCaret(tooltipPoint, ctx, size, options) {
|
|
const caretPosition = this.getCaretPosition(tooltipPoint, size, options);
|
|
ctx.lineTo(caretPosition.x1, caretPosition.y1);
|
|
ctx.lineTo(caretPosition.x2, caretPosition.y2);
|
|
ctx.lineTo(caretPosition.x3, caretPosition.y3);
|
|
}
|
|
getCaretPosition(tooltipPoint, size, options) {
|
|
const {xAlign, yAlign} = this;
|
|
const {caretSize, cornerRadius} = options;
|
|
const {topLeft, topRight, bottomLeft, bottomRight} = toTRBLCorners(cornerRadius);
|
|
const {x: ptX, y: ptY} = tooltipPoint;
|
|
const {width, height} = size;
|
|
let x1, x2, x3, y1, y2, y3;
|
|
if (yAlign === 'center') {
|
|
y2 = ptY + (height / 2);
|
|
if (xAlign === 'left') {
|
|
x1 = ptX;
|
|
x2 = x1 - caretSize;
|
|
y1 = y2 + caretSize;
|
|
y3 = y2 - caretSize;
|
|
} else {
|
|
x1 = ptX + width;
|
|
x2 = x1 + caretSize;
|
|
y1 = y2 - caretSize;
|
|
y3 = y2 + caretSize;
|
|
}
|
|
x3 = x1;
|
|
} else {
|
|
if (xAlign === 'left') {
|
|
x2 = ptX + Math.max(topLeft, bottomLeft) + (caretSize);
|
|
} else if (xAlign === 'right') {
|
|
x2 = ptX + width - Math.max(topRight, bottomRight) - caretSize;
|
|
} else {
|
|
x2 = this.caretX;
|
|
}
|
|
if (yAlign === 'top') {
|
|
y1 = ptY;
|
|
y2 = y1 - caretSize;
|
|
x1 = x2 - caretSize;
|
|
x3 = x2 + caretSize;
|
|
} else {
|
|
y1 = ptY + height;
|
|
y2 = y1 + caretSize;
|
|
x1 = x2 + caretSize;
|
|
x3 = x2 - caretSize;
|
|
}
|
|
y3 = y1;
|
|
}
|
|
return {x1, x2, x3, y1, y2, y3};
|
|
}
|
|
drawTitle(pt, ctx, options) {
|
|
const title = this.title;
|
|
const length = title.length;
|
|
let titleFont, titleSpacing, i;
|
|
if (length) {
|
|
const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);
|
|
pt.x = getAlignedX(this, options.titleAlign, options);
|
|
ctx.textAlign = rtlHelper.textAlign(options.titleAlign);
|
|
ctx.textBaseline = 'middle';
|
|
titleFont = toFont(options.titleFont);
|
|
titleSpacing = options.titleSpacing;
|
|
ctx.fillStyle = options.titleColor;
|
|
ctx.font = titleFont.string;
|
|
for (i = 0; i < length; ++i) {
|
|
ctx.fillText(title[i], rtlHelper.x(pt.x), pt.y + titleFont.lineHeight / 2);
|
|
pt.y += titleFont.lineHeight + titleSpacing;
|
|
if (i + 1 === length) {
|
|
pt.y += options.titleMarginBottom - titleSpacing;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
_drawColorBox(ctx, pt, i, rtlHelper, options) {
|
|
const labelColors = this.labelColors[i];
|
|
const labelPointStyle = this.labelPointStyles[i];
|
|
const {boxHeight, boxWidth, boxPadding} = options;
|
|
const bodyFont = toFont(options.bodyFont);
|
|
const colorX = getAlignedX(this, 'left', options);
|
|
const rtlColorX = rtlHelper.x(colorX);
|
|
const yOffSet = boxHeight < bodyFont.lineHeight ? (bodyFont.lineHeight - boxHeight) / 2 : 0;
|
|
const colorY = pt.y + yOffSet;
|
|
if (options.usePointStyle) {
|
|
const drawOptions = {
|
|
radius: Math.min(boxWidth, boxHeight) / 2,
|
|
pointStyle: labelPointStyle.pointStyle,
|
|
rotation: labelPointStyle.rotation,
|
|
borderWidth: 1
|
|
};
|
|
const centerX = rtlHelper.leftForLtr(rtlColorX, boxWidth) + boxWidth / 2;
|
|
const centerY = colorY + boxHeight / 2;
|
|
ctx.strokeStyle = options.multiKeyBackground;
|
|
ctx.fillStyle = options.multiKeyBackground;
|
|
drawPoint(ctx, drawOptions, centerX, centerY);
|
|
ctx.strokeStyle = labelColors.borderColor;
|
|
ctx.fillStyle = labelColors.backgroundColor;
|
|
drawPoint(ctx, drawOptions, centerX, centerY);
|
|
} else {
|
|
ctx.lineWidth = isObject(labelColors.borderWidth) ? Math.max(...Object.values(labelColors.borderWidth)) : (labelColors.borderWidth || 1);
|
|
ctx.strokeStyle = labelColors.borderColor;
|
|
ctx.setLineDash(labelColors.borderDash || []);
|
|
ctx.lineDashOffset = labelColors.borderDashOffset || 0;
|
|
const outerX = rtlHelper.leftForLtr(rtlColorX, boxWidth - boxPadding);
|
|
const innerX = rtlHelper.leftForLtr(rtlHelper.xPlus(rtlColorX, 1), boxWidth - boxPadding - 2);
|
|
const borderRadius = toTRBLCorners(labelColors.borderRadius);
|
|
if (Object.values(borderRadius).some(v => v !== 0)) {
|
|
ctx.beginPath();
|
|
ctx.fillStyle = options.multiKeyBackground;
|
|
addRoundedRectPath(ctx, {
|
|
x: outerX,
|
|
y: colorY,
|
|
w: boxWidth,
|
|
h: boxHeight,
|
|
radius: borderRadius,
|
|
});
|
|
ctx.fill();
|
|
ctx.stroke();
|
|
ctx.fillStyle = labelColors.backgroundColor;
|
|
ctx.beginPath();
|
|
addRoundedRectPath(ctx, {
|
|
x: innerX,
|
|
y: colorY + 1,
|
|
w: boxWidth - 2,
|
|
h: boxHeight - 2,
|
|
radius: borderRadius,
|
|
});
|
|
ctx.fill();
|
|
} else {
|
|
ctx.fillStyle = options.multiKeyBackground;
|
|
ctx.fillRect(outerX, colorY, boxWidth, boxHeight);
|
|
ctx.strokeRect(outerX, colorY, boxWidth, boxHeight);
|
|
ctx.fillStyle = labelColors.backgroundColor;
|
|
ctx.fillRect(innerX, colorY + 1, boxWidth - 2, boxHeight - 2);
|
|
}
|
|
}
|
|
ctx.fillStyle = this.labelTextColors[i];
|
|
}
|
|
drawBody(pt, ctx, options) {
|
|
const {body} = this;
|
|
const {bodySpacing, bodyAlign, displayColors, boxHeight, boxWidth, boxPadding} = options;
|
|
const bodyFont = toFont(options.bodyFont);
|
|
let bodyLineHeight = bodyFont.lineHeight;
|
|
let xLinePadding = 0;
|
|
const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);
|
|
const fillLineOfText = function(line) {
|
|
ctx.fillText(line, rtlHelper.x(pt.x + xLinePadding), pt.y + bodyLineHeight / 2);
|
|
pt.y += bodyLineHeight + bodySpacing;
|
|
};
|
|
const bodyAlignForCalculation = rtlHelper.textAlign(bodyAlign);
|
|
let bodyItem, textColor, lines, i, j, ilen, jlen;
|
|
ctx.textAlign = bodyAlign;
|
|
ctx.textBaseline = 'middle';
|
|
ctx.font = bodyFont.string;
|
|
pt.x = getAlignedX(this, bodyAlignForCalculation, options);
|
|
ctx.fillStyle = options.bodyColor;
|
|
each(this.beforeBody, fillLineOfText);
|
|
xLinePadding = displayColors && bodyAlignForCalculation !== 'right'
|
|
? bodyAlign === 'center' ? (boxWidth / 2 + boxPadding) : (boxWidth + 2 + boxPadding)
|
|
: 0;
|
|
for (i = 0, ilen = body.length; i < ilen; ++i) {
|
|
bodyItem = body[i];
|
|
textColor = this.labelTextColors[i];
|
|
ctx.fillStyle = textColor;
|
|
each(bodyItem.before, fillLineOfText);
|
|
lines = bodyItem.lines;
|
|
if (displayColors && lines.length) {
|
|
this._drawColorBox(ctx, pt, i, rtlHelper, options);
|
|
bodyLineHeight = Math.max(bodyFont.lineHeight, boxHeight);
|
|
}
|
|
for (j = 0, jlen = lines.length; j < jlen; ++j) {
|
|
fillLineOfText(lines[j]);
|
|
bodyLineHeight = bodyFont.lineHeight;
|
|
}
|
|
each(bodyItem.after, fillLineOfText);
|
|
}
|
|
xLinePadding = 0;
|
|
bodyLineHeight = bodyFont.lineHeight;
|
|
each(this.afterBody, fillLineOfText);
|
|
pt.y -= bodySpacing;
|
|
}
|
|
drawFooter(pt, ctx, options) {
|
|
const footer = this.footer;
|
|
const length = footer.length;
|
|
let footerFont, i;
|
|
if (length) {
|
|
const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);
|
|
pt.x = getAlignedX(this, options.footerAlign, options);
|
|
pt.y += options.footerMarginTop;
|
|
ctx.textAlign = rtlHelper.textAlign(options.footerAlign);
|
|
ctx.textBaseline = 'middle';
|
|
footerFont = toFont(options.footerFont);
|
|
ctx.fillStyle = options.footerColor;
|
|
ctx.font = footerFont.string;
|
|
for (i = 0; i < length; ++i) {
|
|
ctx.fillText(footer[i], rtlHelper.x(pt.x), pt.y + footerFont.lineHeight / 2);
|
|
pt.y += footerFont.lineHeight + options.footerSpacing;
|
|
}
|
|
}
|
|
}
|
|
drawBackground(pt, ctx, tooltipSize, options) {
|
|
const {xAlign, yAlign} = this;
|
|
const {x, y} = pt;
|
|
const {width, height} = tooltipSize;
|
|
const {topLeft, topRight, bottomLeft, bottomRight} = toTRBLCorners(options.cornerRadius);
|
|
ctx.fillStyle = options.backgroundColor;
|
|
ctx.strokeStyle = options.borderColor;
|
|
ctx.lineWidth = options.borderWidth;
|
|
ctx.beginPath();
|
|
ctx.moveTo(x + topLeft, y);
|
|
if (yAlign === 'top') {
|
|
this.drawCaret(pt, ctx, tooltipSize, options);
|
|
}
|
|
ctx.lineTo(x + width - topRight, y);
|
|
ctx.quadraticCurveTo(x + width, y, x + width, y + topRight);
|
|
if (yAlign === 'center' && xAlign === 'right') {
|
|
this.drawCaret(pt, ctx, tooltipSize, options);
|
|
}
|
|
ctx.lineTo(x + width, y + height - bottomRight);
|
|
ctx.quadraticCurveTo(x + width, y + height, x + width - bottomRight, y + height);
|
|
if (yAlign === 'bottom') {
|
|
this.drawCaret(pt, ctx, tooltipSize, options);
|
|
}
|
|
ctx.lineTo(x + bottomLeft, y + height);
|
|
ctx.quadraticCurveTo(x, y + height, x, y + height - bottomLeft);
|
|
if (yAlign === 'center' && xAlign === 'left') {
|
|
this.drawCaret(pt, ctx, tooltipSize, options);
|
|
}
|
|
ctx.lineTo(x, y + topLeft);
|
|
ctx.quadraticCurveTo(x, y, x + topLeft, y);
|
|
ctx.closePath();
|
|
ctx.fill();
|
|
if (options.borderWidth > 0) {
|
|
ctx.stroke();
|
|
}
|
|
}
|
|
_updateAnimationTarget(options) {
|
|
const chart = this.chart;
|
|
const anims = this.$animations;
|
|
const animX = anims && anims.x;
|
|
const animY = anims && anims.y;
|
|
if (animX || animY) {
|
|
const position = positioners[options.position].call(this, this._active, this._eventPosition);
|
|
if (!position) {
|
|
return;
|
|
}
|
|
const size = this._size = getTooltipSize(this, options);
|
|
const positionAndSize = Object.assign({}, position, this._size);
|
|
const alignment = determineAlignment(chart, options, positionAndSize);
|
|
const point = getBackgroundPoint(options, positionAndSize, alignment, chart);
|
|
if (animX._to !== point.x || animY._to !== point.y) {
|
|
this.xAlign = alignment.xAlign;
|
|
this.yAlign = alignment.yAlign;
|
|
this.width = size.width;
|
|
this.height = size.height;
|
|
this.caretX = position.x;
|
|
this.caretY = position.y;
|
|
this._resolveAnimations().update(this, point);
|
|
}
|
|
}
|
|
}
|
|
_willRender() {
|
|
return !!this.opacity;
|
|
}
|
|
draw(ctx) {
|
|
const options = this.options.setContext(this.getContext());
|
|
let opacity = this.opacity;
|
|
if (!opacity) {
|
|
return;
|
|
}
|
|
this._updateAnimationTarget(options);
|
|
const tooltipSize = {
|
|
width: this.width,
|
|
height: this.height
|
|
};
|
|
const pt = {
|
|
x: this.x,
|
|
y: this.y
|
|
};
|
|
opacity = Math.abs(opacity) < 1e-3 ? 0 : opacity;
|
|
const padding = toPadding(options.padding);
|
|
const hasTooltipContent = this.title.length || this.beforeBody.length || this.body.length || this.afterBody.length || this.footer.length;
|
|
if (options.enabled && hasTooltipContent) {
|
|
ctx.save();
|
|
ctx.globalAlpha = opacity;
|
|
this.drawBackground(pt, ctx, tooltipSize, options);
|
|
overrideTextDirection(ctx, options.textDirection);
|
|
pt.y += padding.top;
|
|
this.drawTitle(pt, ctx, options);
|
|
this.drawBody(pt, ctx, options);
|
|
this.drawFooter(pt, ctx, options);
|
|
restoreTextDirection(ctx, options.textDirection);
|
|
ctx.restore();
|
|
}
|
|
}
|
|
getActiveElements() {
|
|
return this._active || [];
|
|
}
|
|
setActiveElements(activeElements, eventPosition) {
|
|
const lastActive = this._active;
|
|
const active = activeElements.map(({datasetIndex, index}) => {
|
|
const meta = this.chart.getDatasetMeta(datasetIndex);
|
|
if (!meta) {
|
|
throw new Error('Cannot find a dataset at index ' + datasetIndex);
|
|
}
|
|
return {
|
|
datasetIndex,
|
|
element: meta.data[index],
|
|
index,
|
|
};
|
|
});
|
|
const changed = !_elementsEqual(lastActive, active);
|
|
const positionChanged = this._positionChanged(active, eventPosition);
|
|
if (changed || positionChanged) {
|
|
this._active = active;
|
|
this._eventPosition = eventPosition;
|
|
this._ignoreReplayEvents = true;
|
|
this.update(true);
|
|
}
|
|
}
|
|
handleEvent(e, replay, inChartArea = true) {
|
|
if (replay && this._ignoreReplayEvents) {
|
|
return false;
|
|
}
|
|
this._ignoreReplayEvents = false;
|
|
const options = this.options;
|
|
const lastActive = this._active || [];
|
|
const active = this._getActiveElements(e, lastActive, replay, inChartArea);
|
|
const positionChanged = this._positionChanged(active, e);
|
|
const changed = replay || !_elementsEqual(active, lastActive) || positionChanged;
|
|
if (changed) {
|
|
this._active = active;
|
|
if (options.enabled || options.external) {
|
|
this._eventPosition = {
|
|
x: e.x,
|
|
y: e.y
|
|
};
|
|
this.update(true, replay);
|
|
}
|
|
}
|
|
return changed;
|
|
}
|
|
_getActiveElements(e, lastActive, replay, inChartArea) {
|
|
const options = this.options;
|
|
if (e.type === 'mouseout') {
|
|
return [];
|
|
}
|
|
if (!inChartArea) {
|
|
return lastActive;
|
|
}
|
|
const active = this.chart.getElementsAtEventForMode(e, options.mode, options, replay);
|
|
if (options.reverse) {
|
|
active.reverse();
|
|
}
|
|
return active;
|
|
}
|
|
_positionChanged(active, e) {
|
|
const {caretX, caretY, options} = this;
|
|
const position = positioners[options.position].call(this, active, e);
|
|
return position !== false && (caretX !== position.x || caretY !== position.y);
|
|
}
|
|
}
|
|
Tooltip.positioners = positioners;
|
|
var plugin_tooltip = {
|
|
id: 'tooltip',
|
|
_element: Tooltip,
|
|
positioners,
|
|
afterInit(chart, _args, options) {
|
|
if (options) {
|
|
chart.tooltip = new Tooltip({chart, options});
|
|
}
|
|
},
|
|
beforeUpdate(chart, _args, options) {
|
|
if (chart.tooltip) {
|
|
chart.tooltip.initialize(options);
|
|
}
|
|
},
|
|
reset(chart, _args, options) {
|
|
if (chart.tooltip) {
|
|
chart.tooltip.initialize(options);
|
|
}
|
|
},
|
|
afterDraw(chart) {
|
|
const tooltip = chart.tooltip;
|
|
if (tooltip && tooltip._willRender()) {
|
|
const args = {
|
|
tooltip
|
|
};
|
|
if (chart.notifyPlugins('beforeTooltipDraw', args) === false) {
|
|
return;
|
|
}
|
|
tooltip.draw(chart.ctx);
|
|
chart.notifyPlugins('afterTooltipDraw', args);
|
|
}
|
|
},
|
|
afterEvent(chart, args) {
|
|
if (chart.tooltip) {
|
|
const useFinalPosition = args.replay;
|
|
if (chart.tooltip.handleEvent(args.event, useFinalPosition, args.inChartArea)) {
|
|
args.changed = true;
|
|
}
|
|
}
|
|
},
|
|
defaults: {
|
|
enabled: true,
|
|
external: null,
|
|
position: 'average',
|
|
backgroundColor: 'rgba(0,0,0,0.8)',
|
|
titleColor: '#fff',
|
|
titleFont: {
|
|
weight: 'bold',
|
|
},
|
|
titleSpacing: 2,
|
|
titleMarginBottom: 6,
|
|
titleAlign: 'left',
|
|
bodyColor: '#fff',
|
|
bodySpacing: 2,
|
|
bodyFont: {
|
|
},
|
|
bodyAlign: 'left',
|
|
footerColor: '#fff',
|
|
footerSpacing: 2,
|
|
footerMarginTop: 6,
|
|
footerFont: {
|
|
weight: 'bold',
|
|
},
|
|
footerAlign: 'left',
|
|
padding: 6,
|
|
caretPadding: 2,
|
|
caretSize: 5,
|
|
cornerRadius: 6,
|
|
boxHeight: (ctx, opts) => opts.bodyFont.size,
|
|
boxWidth: (ctx, opts) => opts.bodyFont.size,
|
|
multiKeyBackground: '#fff',
|
|
displayColors: true,
|
|
boxPadding: 0,
|
|
borderColor: 'rgba(0,0,0,0)',
|
|
borderWidth: 0,
|
|
animation: {
|
|
duration: 400,
|
|
easing: 'easeOutQuart',
|
|
},
|
|
animations: {
|
|
numbers: {
|
|
type: 'number',
|
|
properties: ['x', 'y', 'width', 'height', 'caretX', 'caretY'],
|
|
},
|
|
opacity: {
|
|
easing: 'linear',
|
|
duration: 200
|
|
}
|
|
},
|
|
callbacks: {
|
|
beforeTitle: noop,
|
|
title(tooltipItems) {
|
|
if (tooltipItems.length > 0) {
|
|
const item = tooltipItems[0];
|
|
const labels = item.chart.data.labels;
|
|
const labelCount = labels ? labels.length : 0;
|
|
if (this && this.options && this.options.mode === 'dataset') {
|
|
return item.dataset.label || '';
|
|
} else if (item.label) {
|
|
return item.label;
|
|
} else if (labelCount > 0 && item.dataIndex < labelCount) {
|
|
return labels[item.dataIndex];
|
|
}
|
|
}
|
|
return '';
|
|
},
|
|
afterTitle: noop,
|
|
beforeBody: noop,
|
|
beforeLabel: noop,
|
|
label(tooltipItem) {
|
|
if (this && this.options && this.options.mode === 'dataset') {
|
|
return tooltipItem.label + ': ' + tooltipItem.formattedValue || tooltipItem.formattedValue;
|
|
}
|
|
let label = tooltipItem.dataset.label || '';
|
|
if (label) {
|
|
label += ': ';
|
|
}
|
|
const value = tooltipItem.formattedValue;
|
|
if (!isNullOrUndef(value)) {
|
|
label += value;
|
|
}
|
|
return label;
|
|
},
|
|
labelColor(tooltipItem) {
|
|
const meta = tooltipItem.chart.getDatasetMeta(tooltipItem.datasetIndex);
|
|
const options = meta.controller.getStyle(tooltipItem.dataIndex);
|
|
return {
|
|
borderColor: options.borderColor,
|
|
backgroundColor: options.backgroundColor,
|
|
borderWidth: options.borderWidth,
|
|
borderDash: options.borderDash,
|
|
borderDashOffset: options.borderDashOffset,
|
|
borderRadius: 0,
|
|
};
|
|
},
|
|
labelTextColor() {
|
|
return this.options.bodyColor;
|
|
},
|
|
labelPointStyle(tooltipItem) {
|
|
const meta = tooltipItem.chart.getDatasetMeta(tooltipItem.datasetIndex);
|
|
const options = meta.controller.getStyle(tooltipItem.dataIndex);
|
|
return {
|
|
pointStyle: options.pointStyle,
|
|
rotation: options.rotation,
|
|
};
|
|
},
|
|
afterLabel: noop,
|
|
afterBody: noop,
|
|
beforeFooter: noop,
|
|
footer: noop,
|
|
afterFooter: noop
|
|
}
|
|
},
|
|
defaultRoutes: {
|
|
bodyFont: 'font',
|
|
footerFont: 'font',
|
|
titleFont: 'font'
|
|
},
|
|
descriptors: {
|
|
_scriptable: (name) => name !== 'filter' && name !== 'itemSort' && name !== 'external',
|
|
_indexable: false,
|
|
callbacks: {
|
|
_scriptable: false,
|
|
_indexable: false,
|
|
},
|
|
animation: {
|
|
_fallback: false
|
|
},
|
|
animations: {
|
|
_fallback: 'animation'
|
|
}
|
|
},
|
|
additionalOptionScopes: ['interaction']
|
|
};
|
|
|
|
var plugins = /*#__PURE__*/Object.freeze({
|
|
__proto__: null,
|
|
Decimation: plugin_decimation,
|
|
Filler: index,
|
|
Legend: plugin_legend,
|
|
SubTitle: plugin_subtitle,
|
|
Title: plugin_title,
|
|
Tooltip: plugin_tooltip
|
|
});
|
|
|
|
const addIfString = (labels, raw, index, addedLabels) => {
|
|
if (typeof raw === 'string') {
|
|
index = labels.push(raw) - 1;
|
|
addedLabels.unshift({index, label: raw});
|
|
} else if (isNaN(raw)) {
|
|
index = null;
|
|
}
|
|
return index;
|
|
};
|
|
function findOrAddLabel(labels, raw, index, addedLabels) {
|
|
const first = labels.indexOf(raw);
|
|
if (first === -1) {
|
|
return addIfString(labels, raw, index, addedLabels);
|
|
}
|
|
const last = labels.lastIndexOf(raw);
|
|
return first !== last ? index : first;
|
|
}
|
|
const validIndex = (index, max) => index === null ? null : _limitValue(Math.round(index), 0, max);
|
|
class CategoryScale extends Scale {
|
|
constructor(cfg) {
|
|
super(cfg);
|
|
this._startValue = undefined;
|
|
this._valueRange = 0;
|
|
this._addedLabels = [];
|
|
}
|
|
init(scaleOptions) {
|
|
const added = this._addedLabels;
|
|
if (added.length) {
|
|
const labels = this.getLabels();
|
|
for (const {index, label} of added) {
|
|
if (labels[index] === label) {
|
|
labels.splice(index, 1);
|
|
}
|
|
}
|
|
this._addedLabels = [];
|
|
}
|
|
super.init(scaleOptions);
|
|
}
|
|
parse(raw, index) {
|
|
if (isNullOrUndef(raw)) {
|
|
return null;
|
|
}
|
|
const labels = this.getLabels();
|
|
index = isFinite(index) && labels[index] === raw ? index
|
|
: findOrAddLabel(labels, raw, valueOrDefault(index, raw), this._addedLabels);
|
|
return validIndex(index, labels.length - 1);
|
|
}
|
|
determineDataLimits() {
|
|
const {minDefined, maxDefined} = this.getUserBounds();
|
|
let {min, max} = this.getMinMax(true);
|
|
if (this.options.bounds === 'ticks') {
|
|
if (!minDefined) {
|
|
min = 0;
|
|
}
|
|
if (!maxDefined) {
|
|
max = this.getLabels().length - 1;
|
|
}
|
|
}
|
|
this.min = min;
|
|
this.max = max;
|
|
}
|
|
buildTicks() {
|
|
const min = this.min;
|
|
const max = this.max;
|
|
const offset = this.options.offset;
|
|
const ticks = [];
|
|
let labels = this.getLabels();
|
|
labels = (min === 0 && max === labels.length - 1) ? labels : labels.slice(min, max + 1);
|
|
this._valueRange = Math.max(labels.length - (offset ? 0 : 1), 1);
|
|
this._startValue = this.min - (offset ? 0.5 : 0);
|
|
for (let value = min; value <= max; value++) {
|
|
ticks.push({value});
|
|
}
|
|
return ticks;
|
|
}
|
|
getLabelForValue(value) {
|
|
const labels = this.getLabels();
|
|
if (value >= 0 && value < labels.length) {
|
|
return labels[value];
|
|
}
|
|
return value;
|
|
}
|
|
configure() {
|
|
super.configure();
|
|
if (!this.isHorizontal()) {
|
|
this._reversePixels = !this._reversePixels;
|
|
}
|
|
}
|
|
getPixelForValue(value) {
|
|
if (typeof value !== 'number') {
|
|
value = this.parse(value);
|
|
}
|
|
return value === null ? NaN : this.getPixelForDecimal((value - this._startValue) / this._valueRange);
|
|
}
|
|
getPixelForTick(index) {
|
|
const ticks = this.ticks;
|
|
if (index < 0 || index > ticks.length - 1) {
|
|
return null;
|
|
}
|
|
return this.getPixelForValue(ticks[index].value);
|
|
}
|
|
getValueForPixel(pixel) {
|
|
return Math.round(this._startValue + this.getDecimalForPixel(pixel) * this._valueRange);
|
|
}
|
|
getBasePixel() {
|
|
return this.bottom;
|
|
}
|
|
}
|
|
CategoryScale.id = 'category';
|
|
CategoryScale.defaults = {
|
|
ticks: {
|
|
callback: CategoryScale.prototype.getLabelForValue
|
|
}
|
|
};
|
|
|
|
function generateTicks$1(generationOptions, dataRange) {
|
|
const ticks = [];
|
|
const MIN_SPACING = 1e-14;
|
|
const {bounds, step, min, max, precision, count, maxTicks, maxDigits, includeBounds} = generationOptions;
|
|
const unit = step || 1;
|
|
const maxSpaces = maxTicks - 1;
|
|
const {min: rmin, max: rmax} = dataRange;
|
|
const minDefined = !isNullOrUndef(min);
|
|
const maxDefined = !isNullOrUndef(max);
|
|
const countDefined = !isNullOrUndef(count);
|
|
const minSpacing = (rmax - rmin) / (maxDigits + 1);
|
|
let spacing = niceNum((rmax - rmin) / maxSpaces / unit) * unit;
|
|
let factor, niceMin, niceMax, numSpaces;
|
|
if (spacing < MIN_SPACING && !minDefined && !maxDefined) {
|
|
return [{value: rmin}, {value: rmax}];
|
|
}
|
|
numSpaces = Math.ceil(rmax / spacing) - Math.floor(rmin / spacing);
|
|
if (numSpaces > maxSpaces) {
|
|
spacing = niceNum(numSpaces * spacing / maxSpaces / unit) * unit;
|
|
}
|
|
if (!isNullOrUndef(precision)) {
|
|
factor = Math.pow(10, precision);
|
|
spacing = Math.ceil(spacing * factor) / factor;
|
|
}
|
|
if (bounds === 'ticks') {
|
|
niceMin = Math.floor(rmin / spacing) * spacing;
|
|
niceMax = Math.ceil(rmax / spacing) * spacing;
|
|
} else {
|
|
niceMin = rmin;
|
|
niceMax = rmax;
|
|
}
|
|
if (minDefined && maxDefined && step && almostWhole((max - min) / step, spacing / 1000)) {
|
|
numSpaces = Math.round(Math.min((max - min) / spacing, maxTicks));
|
|
spacing = (max - min) / numSpaces;
|
|
niceMin = min;
|
|
niceMax = max;
|
|
} else if (countDefined) {
|
|
niceMin = minDefined ? min : niceMin;
|
|
niceMax = maxDefined ? max : niceMax;
|
|
numSpaces = count - 1;
|
|
spacing = (niceMax - niceMin) / numSpaces;
|
|
} else {
|
|
numSpaces = (niceMax - niceMin) / spacing;
|
|
if (almostEquals(numSpaces, Math.round(numSpaces), spacing / 1000)) {
|
|
numSpaces = Math.round(numSpaces);
|
|
} else {
|
|
numSpaces = Math.ceil(numSpaces);
|
|
}
|
|
}
|
|
const decimalPlaces = Math.max(
|
|
_decimalPlaces(spacing),
|
|
_decimalPlaces(niceMin)
|
|
);
|
|
factor = Math.pow(10, isNullOrUndef(precision) ? decimalPlaces : precision);
|
|
niceMin = Math.round(niceMin * factor) / factor;
|
|
niceMax = Math.round(niceMax * factor) / factor;
|
|
let j = 0;
|
|
if (minDefined) {
|
|
if (includeBounds && niceMin !== min) {
|
|
ticks.push({value: min});
|
|
if (niceMin < min) {
|
|
j++;
|
|
}
|
|
if (almostEquals(Math.round((niceMin + j * spacing) * factor) / factor, min, relativeLabelSize(min, minSpacing, generationOptions))) {
|
|
j++;
|
|
}
|
|
} else if (niceMin < min) {
|
|
j++;
|
|
}
|
|
}
|
|
for (; j < numSpaces; ++j) {
|
|
ticks.push({value: Math.round((niceMin + j * spacing) * factor) / factor});
|
|
}
|
|
if (maxDefined && includeBounds && niceMax !== max) {
|
|
if (ticks.length && almostEquals(ticks[ticks.length - 1].value, max, relativeLabelSize(max, minSpacing, generationOptions))) {
|
|
ticks[ticks.length - 1].value = max;
|
|
} else {
|
|
ticks.push({value: max});
|
|
}
|
|
} else if (!maxDefined || niceMax === max) {
|
|
ticks.push({value: niceMax});
|
|
}
|
|
return ticks;
|
|
}
|
|
function relativeLabelSize(value, minSpacing, {horizontal, minRotation}) {
|
|
const rad = toRadians(minRotation);
|
|
const ratio = (horizontal ? Math.sin(rad) : Math.cos(rad)) || 0.001;
|
|
const length = 0.75 * minSpacing * ('' + value).length;
|
|
return Math.min(minSpacing / ratio, length);
|
|
}
|
|
class LinearScaleBase extends Scale {
|
|
constructor(cfg) {
|
|
super(cfg);
|
|
this.start = undefined;
|
|
this.end = undefined;
|
|
this._startValue = undefined;
|
|
this._endValue = undefined;
|
|
this._valueRange = 0;
|
|
}
|
|
parse(raw, index) {
|
|
if (isNullOrUndef(raw)) {
|
|
return null;
|
|
}
|
|
if ((typeof raw === 'number' || raw instanceof Number) && !isFinite(+raw)) {
|
|
return null;
|
|
}
|
|
return +raw;
|
|
}
|
|
handleTickRangeOptions() {
|
|
const {beginAtZero} = this.options;
|
|
const {minDefined, maxDefined} = this.getUserBounds();
|
|
let {min, max} = this;
|
|
const setMin = v => (min = minDefined ? min : v);
|
|
const setMax = v => (max = maxDefined ? max : v);
|
|
if (beginAtZero) {
|
|
const minSign = sign(min);
|
|
const maxSign = sign(max);
|
|
if (minSign < 0 && maxSign < 0) {
|
|
setMax(0);
|
|
} else if (minSign > 0 && maxSign > 0) {
|
|
setMin(0);
|
|
}
|
|
}
|
|
if (min === max) {
|
|
let offset = 1;
|
|
if (max >= Number.MAX_SAFE_INTEGER || min <= Number.MIN_SAFE_INTEGER) {
|
|
offset = Math.abs(max * 0.05);
|
|
}
|
|
setMax(max + offset);
|
|
if (!beginAtZero) {
|
|
setMin(min - offset);
|
|
}
|
|
}
|
|
this.min = min;
|
|
this.max = max;
|
|
}
|
|
getTickLimit() {
|
|
const tickOpts = this.options.ticks;
|
|
let {maxTicksLimit, stepSize} = tickOpts;
|
|
let maxTicks;
|
|
if (stepSize) {
|
|
maxTicks = Math.ceil(this.max / stepSize) - Math.floor(this.min / stepSize) + 1;
|
|
if (maxTicks > 1000) {
|
|
console.warn(`scales.${this.id}.ticks.stepSize: ${stepSize} would result generating up to ${maxTicks} ticks. Limiting to 1000.`);
|
|
maxTicks = 1000;
|
|
}
|
|
} else {
|
|
maxTicks = this.computeTickLimit();
|
|
maxTicksLimit = maxTicksLimit || 11;
|
|
}
|
|
if (maxTicksLimit) {
|
|
maxTicks = Math.min(maxTicksLimit, maxTicks);
|
|
}
|
|
return maxTicks;
|
|
}
|
|
computeTickLimit() {
|
|
return Number.POSITIVE_INFINITY;
|
|
}
|
|
buildTicks() {
|
|
const opts = this.options;
|
|
const tickOpts = opts.ticks;
|
|
let maxTicks = this.getTickLimit();
|
|
maxTicks = Math.max(2, maxTicks);
|
|
const numericGeneratorOptions = {
|
|
maxTicks,
|
|
bounds: opts.bounds,
|
|
min: opts.min,
|
|
max: opts.max,
|
|
precision: tickOpts.precision,
|
|
step: tickOpts.stepSize,
|
|
count: tickOpts.count,
|
|
maxDigits: this._maxDigits(),
|
|
horizontal: this.isHorizontal(),
|
|
minRotation: tickOpts.minRotation || 0,
|
|
includeBounds: tickOpts.includeBounds !== false
|
|
};
|
|
const dataRange = this._range || this;
|
|
const ticks = generateTicks$1(numericGeneratorOptions, dataRange);
|
|
if (opts.bounds === 'ticks') {
|
|
_setMinAndMaxByKey(ticks, this, 'value');
|
|
}
|
|
if (opts.reverse) {
|
|
ticks.reverse();
|
|
this.start = this.max;
|
|
this.end = this.min;
|
|
} else {
|
|
this.start = this.min;
|
|
this.end = this.max;
|
|
}
|
|
return ticks;
|
|
}
|
|
configure() {
|
|
const ticks = this.ticks;
|
|
let start = this.min;
|
|
let end = this.max;
|
|
super.configure();
|
|
if (this.options.offset && ticks.length) {
|
|
const offset = (end - start) / Math.max(ticks.length - 1, 1) / 2;
|
|
start -= offset;
|
|
end += offset;
|
|
}
|
|
this._startValue = start;
|
|
this._endValue = end;
|
|
this._valueRange = end - start;
|
|
}
|
|
getLabelForValue(value) {
|
|
return formatNumber(value, this.chart.options.locale, this.options.ticks.format);
|
|
}
|
|
}
|
|
|
|
class LinearScale extends LinearScaleBase {
|
|
determineDataLimits() {
|
|
const {min, max} = this.getMinMax(true);
|
|
this.min = isNumberFinite(min) ? min : 0;
|
|
this.max = isNumberFinite(max) ? max : 1;
|
|
this.handleTickRangeOptions();
|
|
}
|
|
computeTickLimit() {
|
|
const horizontal = this.isHorizontal();
|
|
const length = horizontal ? this.width : this.height;
|
|
const minRotation = toRadians(this.options.ticks.minRotation);
|
|
const ratio = (horizontal ? Math.sin(minRotation) : Math.cos(minRotation)) || 0.001;
|
|
const tickFont = this._resolveTickFontOptions(0);
|
|
return Math.ceil(length / Math.min(40, tickFont.lineHeight / ratio));
|
|
}
|
|
getPixelForValue(value) {
|
|
return value === null ? NaN : this.getPixelForDecimal((value - this._startValue) / this._valueRange);
|
|
}
|
|
getValueForPixel(pixel) {
|
|
return this._startValue + this.getDecimalForPixel(pixel) * this._valueRange;
|
|
}
|
|
}
|
|
LinearScale.id = 'linear';
|
|
LinearScale.defaults = {
|
|
ticks: {
|
|
callback: Ticks.formatters.numeric
|
|
}
|
|
};
|
|
|
|
function isMajor(tickVal) {
|
|
const remain = tickVal / (Math.pow(10, Math.floor(log10(tickVal))));
|
|
return remain === 1;
|
|
}
|
|
function generateTicks(generationOptions, dataRange) {
|
|
const endExp = Math.floor(log10(dataRange.max));
|
|
const endSignificand = Math.ceil(dataRange.max / Math.pow(10, endExp));
|
|
const ticks = [];
|
|
let tickVal = finiteOrDefault(generationOptions.min, Math.pow(10, Math.floor(log10(dataRange.min))));
|
|
let exp = Math.floor(log10(tickVal));
|
|
let significand = Math.floor(tickVal / Math.pow(10, exp));
|
|
let precision = exp < 0 ? Math.pow(10, Math.abs(exp)) : 1;
|
|
do {
|
|
ticks.push({value: tickVal, major: isMajor(tickVal)});
|
|
++significand;
|
|
if (significand === 10) {
|
|
significand = 1;
|
|
++exp;
|
|
precision = exp >= 0 ? 1 : precision;
|
|
}
|
|
tickVal = Math.round(significand * Math.pow(10, exp) * precision) / precision;
|
|
} while (exp < endExp || (exp === endExp && significand < endSignificand));
|
|
const lastTick = finiteOrDefault(generationOptions.max, tickVal);
|
|
ticks.push({value: lastTick, major: isMajor(tickVal)});
|
|
return ticks;
|
|
}
|
|
class LogarithmicScale extends Scale {
|
|
constructor(cfg) {
|
|
super(cfg);
|
|
this.start = undefined;
|
|
this.end = undefined;
|
|
this._startValue = undefined;
|
|
this._valueRange = 0;
|
|
}
|
|
parse(raw, index) {
|
|
const value = LinearScaleBase.prototype.parse.apply(this, [raw, index]);
|
|
if (value === 0) {
|
|
this._zero = true;
|
|
return undefined;
|
|
}
|
|
return isNumberFinite(value) && value > 0 ? value : null;
|
|
}
|
|
determineDataLimits() {
|
|
const {min, max} = this.getMinMax(true);
|
|
this.min = isNumberFinite(min) ? Math.max(0, min) : null;
|
|
this.max = isNumberFinite(max) ? Math.max(0, max) : null;
|
|
if (this.options.beginAtZero) {
|
|
this._zero = true;
|
|
}
|
|
this.handleTickRangeOptions();
|
|
}
|
|
handleTickRangeOptions() {
|
|
const {minDefined, maxDefined} = this.getUserBounds();
|
|
let min = this.min;
|
|
let max = this.max;
|
|
const setMin = v => (min = minDefined ? min : v);
|
|
const setMax = v => (max = maxDefined ? max : v);
|
|
const exp = (v, m) => Math.pow(10, Math.floor(log10(v)) + m);
|
|
if (min === max) {
|
|
if (min <= 0) {
|
|
setMin(1);
|
|
setMax(10);
|
|
} else {
|
|
setMin(exp(min, -1));
|
|
setMax(exp(max, +1));
|
|
}
|
|
}
|
|
if (min <= 0) {
|
|
setMin(exp(max, -1));
|
|
}
|
|
if (max <= 0) {
|
|
setMax(exp(min, +1));
|
|
}
|
|
if (this._zero && this.min !== this._suggestedMin && min === exp(this.min, 0)) {
|
|
setMin(exp(min, -1));
|
|
}
|
|
this.min = min;
|
|
this.max = max;
|
|
}
|
|
buildTicks() {
|
|
const opts = this.options;
|
|
const generationOptions = {
|
|
min: this._userMin,
|
|
max: this._userMax
|
|
};
|
|
const ticks = generateTicks(generationOptions, this);
|
|
if (opts.bounds === 'ticks') {
|
|
_setMinAndMaxByKey(ticks, this, 'value');
|
|
}
|
|
if (opts.reverse) {
|
|
ticks.reverse();
|
|
this.start = this.max;
|
|
this.end = this.min;
|
|
} else {
|
|
this.start = this.min;
|
|
this.end = this.max;
|
|
}
|
|
return ticks;
|
|
}
|
|
getLabelForValue(value) {
|
|
return value === undefined
|
|
? '0'
|
|
: formatNumber(value, this.chart.options.locale, this.options.ticks.format);
|
|
}
|
|
configure() {
|
|
const start = this.min;
|
|
super.configure();
|
|
this._startValue = log10(start);
|
|
this._valueRange = log10(this.max) - log10(start);
|
|
}
|
|
getPixelForValue(value) {
|
|
if (value === undefined || value === 0) {
|
|
value = this.min;
|
|
}
|
|
if (value === null || isNaN(value)) {
|
|
return NaN;
|
|
}
|
|
return this.getPixelForDecimal(value === this.min
|
|
? 0
|
|
: (log10(value) - this._startValue) / this._valueRange);
|
|
}
|
|
getValueForPixel(pixel) {
|
|
const decimal = this.getDecimalForPixel(pixel);
|
|
return Math.pow(10, this._startValue + decimal * this._valueRange);
|
|
}
|
|
}
|
|
LogarithmicScale.id = 'logarithmic';
|
|
LogarithmicScale.defaults = {
|
|
ticks: {
|
|
callback: Ticks.formatters.logarithmic,
|
|
major: {
|
|
enabled: true
|
|
}
|
|
}
|
|
};
|
|
|
|
function getTickBackdropHeight(opts) {
|
|
const tickOpts = opts.ticks;
|
|
if (tickOpts.display && opts.display) {
|
|
const padding = toPadding(tickOpts.backdropPadding);
|
|
return valueOrDefault(tickOpts.font && tickOpts.font.size, defaults.font.size) + padding.height;
|
|
}
|
|
return 0;
|
|
}
|
|
function measureLabelSize(ctx, font, label) {
|
|
label = isArray(label) ? label : [label];
|
|
return {
|
|
w: _longestText(ctx, font.string, label),
|
|
h: label.length * font.lineHeight
|
|
};
|
|
}
|
|
function determineLimits(angle, pos, size, min, max) {
|
|
if (angle === min || angle === max) {
|
|
return {
|
|
start: pos - (size / 2),
|
|
end: pos + (size / 2)
|
|
};
|
|
} else if (angle < min || angle > max) {
|
|
return {
|
|
start: pos - size,
|
|
end: pos
|
|
};
|
|
}
|
|
return {
|
|
start: pos,
|
|
end: pos + size
|
|
};
|
|
}
|
|
function fitWithPointLabels(scale) {
|
|
const orig = {
|
|
l: scale.left + scale._padding.left,
|
|
r: scale.right - scale._padding.right,
|
|
t: scale.top + scale._padding.top,
|
|
b: scale.bottom - scale._padding.bottom
|
|
};
|
|
const limits = Object.assign({}, orig);
|
|
const labelSizes = [];
|
|
const padding = [];
|
|
const valueCount = scale._pointLabels.length;
|
|
const pointLabelOpts = scale.options.pointLabels;
|
|
const additionalAngle = pointLabelOpts.centerPointLabels ? PI / valueCount : 0;
|
|
for (let i = 0; i < valueCount; i++) {
|
|
const opts = pointLabelOpts.setContext(scale.getPointLabelContext(i));
|
|
padding[i] = opts.padding;
|
|
const pointPosition = scale.getPointPosition(i, scale.drawingArea + padding[i], additionalAngle);
|
|
const plFont = toFont(opts.font);
|
|
const textSize = measureLabelSize(scale.ctx, plFont, scale._pointLabels[i]);
|
|
labelSizes[i] = textSize;
|
|
const angleRadians = _normalizeAngle(scale.getIndexAngle(i) + additionalAngle);
|
|
const angle = Math.round(toDegrees(angleRadians));
|
|
const hLimits = determineLimits(angle, pointPosition.x, textSize.w, 0, 180);
|
|
const vLimits = determineLimits(angle, pointPosition.y, textSize.h, 90, 270);
|
|
updateLimits(limits, orig, angleRadians, hLimits, vLimits);
|
|
}
|
|
scale.setCenterPoint(
|
|
orig.l - limits.l,
|
|
limits.r - orig.r,
|
|
orig.t - limits.t,
|
|
limits.b - orig.b
|
|
);
|
|
scale._pointLabelItems = buildPointLabelItems(scale, labelSizes, padding);
|
|
}
|
|
function updateLimits(limits, orig, angle, hLimits, vLimits) {
|
|
const sin = Math.abs(Math.sin(angle));
|
|
const cos = Math.abs(Math.cos(angle));
|
|
let x = 0;
|
|
let y = 0;
|
|
if (hLimits.start < orig.l) {
|
|
x = (orig.l - hLimits.start) / sin;
|
|
limits.l = Math.min(limits.l, orig.l - x);
|
|
} else if (hLimits.end > orig.r) {
|
|
x = (hLimits.end - orig.r) / sin;
|
|
limits.r = Math.max(limits.r, orig.r + x);
|
|
}
|
|
if (vLimits.start < orig.t) {
|
|
y = (orig.t - vLimits.start) / cos;
|
|
limits.t = Math.min(limits.t, orig.t - y);
|
|
} else if (vLimits.end > orig.b) {
|
|
y = (vLimits.end - orig.b) / cos;
|
|
limits.b = Math.max(limits.b, orig.b + y);
|
|
}
|
|
}
|
|
function buildPointLabelItems(scale, labelSizes, padding) {
|
|
const items = [];
|
|
const valueCount = scale._pointLabels.length;
|
|
const opts = scale.options;
|
|
const extra = getTickBackdropHeight(opts) / 2;
|
|
const outerDistance = scale.drawingArea;
|
|
const additionalAngle = opts.pointLabels.centerPointLabels ? PI / valueCount : 0;
|
|
for (let i = 0; i < valueCount; i++) {
|
|
const pointLabelPosition = scale.getPointPosition(i, outerDistance + extra + padding[i], additionalAngle);
|
|
const angle = Math.round(toDegrees(_normalizeAngle(pointLabelPosition.angle + HALF_PI)));
|
|
const size = labelSizes[i];
|
|
const y = yForAngle(pointLabelPosition.y, size.h, angle);
|
|
const textAlign = getTextAlignForAngle(angle);
|
|
const left = leftForTextAlign(pointLabelPosition.x, size.w, textAlign);
|
|
items.push({
|
|
x: pointLabelPosition.x,
|
|
y,
|
|
textAlign,
|
|
left,
|
|
top: y,
|
|
right: left + size.w,
|
|
bottom: y + size.h
|
|
});
|
|
}
|
|
return items;
|
|
}
|
|
function getTextAlignForAngle(angle) {
|
|
if (angle === 0 || angle === 180) {
|
|
return 'center';
|
|
} else if (angle < 180) {
|
|
return 'left';
|
|
}
|
|
return 'right';
|
|
}
|
|
function leftForTextAlign(x, w, align) {
|
|
if (align === 'right') {
|
|
x -= w;
|
|
} else if (align === 'center') {
|
|
x -= (w / 2);
|
|
}
|
|
return x;
|
|
}
|
|
function yForAngle(y, h, angle) {
|
|
if (angle === 90 || angle === 270) {
|
|
y -= (h / 2);
|
|
} else if (angle > 270 || angle < 90) {
|
|
y -= h;
|
|
}
|
|
return y;
|
|
}
|
|
function drawPointLabels(scale, labelCount) {
|
|
const {ctx, options: {pointLabels}} = scale;
|
|
for (let i = labelCount - 1; i >= 0; i--) {
|
|
const optsAtIndex = pointLabels.setContext(scale.getPointLabelContext(i));
|
|
const plFont = toFont(optsAtIndex.font);
|
|
const {x, y, textAlign, left, top, right, bottom} = scale._pointLabelItems[i];
|
|
const {backdropColor} = optsAtIndex;
|
|
if (!isNullOrUndef(backdropColor)) {
|
|
const borderRadius = toTRBLCorners(optsAtIndex.borderRadius);
|
|
const padding = toPadding(optsAtIndex.backdropPadding);
|
|
ctx.fillStyle = backdropColor;
|
|
const backdropLeft = left - padding.left;
|
|
const backdropTop = top - padding.top;
|
|
const backdropWidth = right - left + padding.width;
|
|
const backdropHeight = bottom - top + padding.height;
|
|
if (Object.values(borderRadius).some(v => v !== 0)) {
|
|
ctx.beginPath();
|
|
addRoundedRectPath(ctx, {
|
|
x: backdropLeft,
|
|
y: backdropTop,
|
|
w: backdropWidth,
|
|
h: backdropHeight,
|
|
radius: borderRadius,
|
|
});
|
|
ctx.fill();
|
|
} else {
|
|
ctx.fillRect(backdropLeft, backdropTop, backdropWidth, backdropHeight);
|
|
}
|
|
}
|
|
renderText(
|
|
ctx,
|
|
scale._pointLabels[i],
|
|
x,
|
|
y + (plFont.lineHeight / 2),
|
|
plFont,
|
|
{
|
|
color: optsAtIndex.color,
|
|
textAlign: textAlign,
|
|
textBaseline: 'middle'
|
|
}
|
|
);
|
|
}
|
|
}
|
|
function pathRadiusLine(scale, radius, circular, labelCount) {
|
|
const {ctx} = scale;
|
|
if (circular) {
|
|
ctx.arc(scale.xCenter, scale.yCenter, radius, 0, TAU);
|
|
} else {
|
|
let pointPosition = scale.getPointPosition(0, radius);
|
|
ctx.moveTo(pointPosition.x, pointPosition.y);
|
|
for (let i = 1; i < labelCount; i++) {
|
|
pointPosition = scale.getPointPosition(i, radius);
|
|
ctx.lineTo(pointPosition.x, pointPosition.y);
|
|
}
|
|
}
|
|
}
|
|
function drawRadiusLine(scale, gridLineOpts, radius, labelCount) {
|
|
const ctx = scale.ctx;
|
|
const circular = gridLineOpts.circular;
|
|
const {color, lineWidth} = gridLineOpts;
|
|
if ((!circular && !labelCount) || !color || !lineWidth || radius < 0) {
|
|
return;
|
|
}
|
|
ctx.save();
|
|
ctx.strokeStyle = color;
|
|
ctx.lineWidth = lineWidth;
|
|
ctx.setLineDash(gridLineOpts.borderDash);
|
|
ctx.lineDashOffset = gridLineOpts.borderDashOffset;
|
|
ctx.beginPath();
|
|
pathRadiusLine(scale, radius, circular, labelCount);
|
|
ctx.closePath();
|
|
ctx.stroke();
|
|
ctx.restore();
|
|
}
|
|
function createPointLabelContext(parent, index, label) {
|
|
return createContext(parent, {
|
|
label,
|
|
index,
|
|
type: 'pointLabel'
|
|
});
|
|
}
|
|
class RadialLinearScale extends LinearScaleBase {
|
|
constructor(cfg) {
|
|
super(cfg);
|
|
this.xCenter = undefined;
|
|
this.yCenter = undefined;
|
|
this.drawingArea = undefined;
|
|
this._pointLabels = [];
|
|
this._pointLabelItems = [];
|
|
}
|
|
setDimensions() {
|
|
const padding = this._padding = toPadding(getTickBackdropHeight(this.options) / 2);
|
|
const w = this.width = this.maxWidth - padding.width;
|
|
const h = this.height = this.maxHeight - padding.height;
|
|
this.xCenter = Math.floor(this.left + w / 2 + padding.left);
|
|
this.yCenter = Math.floor(this.top + h / 2 + padding.top);
|
|
this.drawingArea = Math.floor(Math.min(w, h) / 2);
|
|
}
|
|
determineDataLimits() {
|
|
const {min, max} = this.getMinMax(false);
|
|
this.min = isNumberFinite(min) && !isNaN(min) ? min : 0;
|
|
this.max = isNumberFinite(max) && !isNaN(max) ? max : 0;
|
|
this.handleTickRangeOptions();
|
|
}
|
|
computeTickLimit() {
|
|
return Math.ceil(this.drawingArea / getTickBackdropHeight(this.options));
|
|
}
|
|
generateTickLabels(ticks) {
|
|
LinearScaleBase.prototype.generateTickLabels.call(this, ticks);
|
|
this._pointLabels = this.getLabels()
|
|
.map((value, index) => {
|
|
const label = callback(this.options.pointLabels.callback, [value, index], this);
|
|
return label || label === 0 ? label : '';
|
|
})
|
|
.filter((v, i) => this.chart.getDataVisibility(i));
|
|
}
|
|
fit() {
|
|
const opts = this.options;
|
|
if (opts.display && opts.pointLabels.display) {
|
|
fitWithPointLabels(this);
|
|
} else {
|
|
this.setCenterPoint(0, 0, 0, 0);
|
|
}
|
|
}
|
|
setCenterPoint(leftMovement, rightMovement, topMovement, bottomMovement) {
|
|
this.xCenter += Math.floor((leftMovement - rightMovement) / 2);
|
|
this.yCenter += Math.floor((topMovement - bottomMovement) / 2);
|
|
this.drawingArea -= Math.min(this.drawingArea / 2, Math.max(leftMovement, rightMovement, topMovement, bottomMovement));
|
|
}
|
|
getIndexAngle(index) {
|
|
const angleMultiplier = TAU / (this._pointLabels.length || 1);
|
|
const startAngle = this.options.startAngle || 0;
|
|
return _normalizeAngle(index * angleMultiplier + toRadians(startAngle));
|
|
}
|
|
getDistanceFromCenterForValue(value) {
|
|
if (isNullOrUndef(value)) {
|
|
return NaN;
|
|
}
|
|
const scalingFactor = this.drawingArea / (this.max - this.min);
|
|
if (this.options.reverse) {
|
|
return (this.max - value) * scalingFactor;
|
|
}
|
|
return (value - this.min) * scalingFactor;
|
|
}
|
|
getValueForDistanceFromCenter(distance) {
|
|
if (isNullOrUndef(distance)) {
|
|
return NaN;
|
|
}
|
|
const scaledDistance = distance / (this.drawingArea / (this.max - this.min));
|
|
return this.options.reverse ? this.max - scaledDistance : this.min + scaledDistance;
|
|
}
|
|
getPointLabelContext(index) {
|
|
const pointLabels = this._pointLabels || [];
|
|
if (index >= 0 && index < pointLabels.length) {
|
|
const pointLabel = pointLabels[index];
|
|
return createPointLabelContext(this.getContext(), index, pointLabel);
|
|
}
|
|
}
|
|
getPointPosition(index, distanceFromCenter, additionalAngle = 0) {
|
|
const angle = this.getIndexAngle(index) - HALF_PI + additionalAngle;
|
|
return {
|
|
x: Math.cos(angle) * distanceFromCenter + this.xCenter,
|
|
y: Math.sin(angle) * distanceFromCenter + this.yCenter,
|
|
angle
|
|
};
|
|
}
|
|
getPointPositionForValue(index, value) {
|
|
return this.getPointPosition(index, this.getDistanceFromCenterForValue(value));
|
|
}
|
|
getBasePosition(index) {
|
|
return this.getPointPositionForValue(index || 0, this.getBaseValue());
|
|
}
|
|
getPointLabelPosition(index) {
|
|
const {left, top, right, bottom} = this._pointLabelItems[index];
|
|
return {
|
|
left,
|
|
top,
|
|
right,
|
|
bottom,
|
|
};
|
|
}
|
|
drawBackground() {
|
|
const {backgroundColor, grid: {circular}} = this.options;
|
|
if (backgroundColor) {
|
|
const ctx = this.ctx;
|
|
ctx.save();
|
|
ctx.beginPath();
|
|
pathRadiusLine(this, this.getDistanceFromCenterForValue(this._endValue), circular, this._pointLabels.length);
|
|
ctx.closePath();
|
|
ctx.fillStyle = backgroundColor;
|
|
ctx.fill();
|
|
ctx.restore();
|
|
}
|
|
}
|
|
drawGrid() {
|
|
const ctx = this.ctx;
|
|
const opts = this.options;
|
|
const {angleLines, grid} = opts;
|
|
const labelCount = this._pointLabels.length;
|
|
let i, offset, position;
|
|
if (opts.pointLabels.display) {
|
|
drawPointLabels(this, labelCount);
|
|
}
|
|
if (grid.display) {
|
|
this.ticks.forEach((tick, index) => {
|
|
if (index !== 0) {
|
|
offset = this.getDistanceFromCenterForValue(tick.value);
|
|
const optsAtIndex = grid.setContext(this.getContext(index - 1));
|
|
drawRadiusLine(this, optsAtIndex, offset, labelCount);
|
|
}
|
|
});
|
|
}
|
|
if (angleLines.display) {
|
|
ctx.save();
|
|
for (i = labelCount - 1; i >= 0; i--) {
|
|
const optsAtIndex = angleLines.setContext(this.getPointLabelContext(i));
|
|
const {color, lineWidth} = optsAtIndex;
|
|
if (!lineWidth || !color) {
|
|
continue;
|
|
}
|
|
ctx.lineWidth = lineWidth;
|
|
ctx.strokeStyle = color;
|
|
ctx.setLineDash(optsAtIndex.borderDash);
|
|
ctx.lineDashOffset = optsAtIndex.borderDashOffset;
|
|
offset = this.getDistanceFromCenterForValue(opts.ticks.reverse ? this.min : this.max);
|
|
position = this.getPointPosition(i, offset);
|
|
ctx.beginPath();
|
|
ctx.moveTo(this.xCenter, this.yCenter);
|
|
ctx.lineTo(position.x, position.y);
|
|
ctx.stroke();
|
|
}
|
|
ctx.restore();
|
|
}
|
|
}
|
|
drawBorder() {}
|
|
drawLabels() {
|
|
const ctx = this.ctx;
|
|
const opts = this.options;
|
|
const tickOpts = opts.ticks;
|
|
if (!tickOpts.display) {
|
|
return;
|
|
}
|
|
const startAngle = this.getIndexAngle(0);
|
|
let offset, width;
|
|
ctx.save();
|
|
ctx.translate(this.xCenter, this.yCenter);
|
|
ctx.rotate(startAngle);
|
|
ctx.textAlign = 'center';
|
|
ctx.textBaseline = 'middle';
|
|
this.ticks.forEach((tick, index) => {
|
|
if (index === 0 && !opts.reverse) {
|
|
return;
|
|
}
|
|
const optsAtIndex = tickOpts.setContext(this.getContext(index));
|
|
const tickFont = toFont(optsAtIndex.font);
|
|
offset = this.getDistanceFromCenterForValue(this.ticks[index].value);
|
|
if (optsAtIndex.showLabelBackdrop) {
|
|
ctx.font = tickFont.string;
|
|
width = ctx.measureText(tick.label).width;
|
|
ctx.fillStyle = optsAtIndex.backdropColor;
|
|
const padding = toPadding(optsAtIndex.backdropPadding);
|
|
ctx.fillRect(
|
|
-width / 2 - padding.left,
|
|
-offset - tickFont.size / 2 - padding.top,
|
|
width + padding.width,
|
|
tickFont.size + padding.height
|
|
);
|
|
}
|
|
renderText(ctx, tick.label, 0, -offset, tickFont, {
|
|
color: optsAtIndex.color,
|
|
});
|
|
});
|
|
ctx.restore();
|
|
}
|
|
drawTitle() {}
|
|
}
|
|
RadialLinearScale.id = 'radialLinear';
|
|
RadialLinearScale.defaults = {
|
|
display: true,
|
|
animate: true,
|
|
position: 'chartArea',
|
|
angleLines: {
|
|
display: true,
|
|
lineWidth: 1,
|
|
borderDash: [],
|
|
borderDashOffset: 0.0
|
|
},
|
|
grid: {
|
|
circular: false
|
|
},
|
|
startAngle: 0,
|
|
ticks: {
|
|
showLabelBackdrop: true,
|
|
callback: Ticks.formatters.numeric
|
|
},
|
|
pointLabels: {
|
|
backdropColor: undefined,
|
|
backdropPadding: 2,
|
|
display: true,
|
|
font: {
|
|
size: 10
|
|
},
|
|
callback(label) {
|
|
return label;
|
|
},
|
|
padding: 5,
|
|
centerPointLabels: false
|
|
}
|
|
};
|
|
RadialLinearScale.defaultRoutes = {
|
|
'angleLines.color': 'borderColor',
|
|
'pointLabels.color': 'color',
|
|
'ticks.color': 'color'
|
|
};
|
|
RadialLinearScale.descriptors = {
|
|
angleLines: {
|
|
_fallback: 'grid'
|
|
}
|
|
};
|
|
|
|
const INTERVALS = {
|
|
millisecond: {common: true, size: 1, steps: 1000},
|
|
second: {common: true, size: 1000, steps: 60},
|
|
minute: {common: true, size: 60000, steps: 60},
|
|
hour: {common: true, size: 3600000, steps: 24},
|
|
day: {common: true, size: 86400000, steps: 30},
|
|
week: {common: false, size: 604800000, steps: 4},
|
|
month: {common: true, size: 2.628e9, steps: 12},
|
|
quarter: {common: false, size: 7.884e9, steps: 4},
|
|
year: {common: true, size: 3.154e10}
|
|
};
|
|
const UNITS = (Object.keys(INTERVALS));
|
|
function sorter(a, b) {
|
|
return a - b;
|
|
}
|
|
function parse(scale, input) {
|
|
if (isNullOrUndef(input)) {
|
|
return null;
|
|
}
|
|
const adapter = scale._adapter;
|
|
const {parser, round, isoWeekday} = scale._parseOpts;
|
|
let value = input;
|
|
if (typeof parser === 'function') {
|
|
value = parser(value);
|
|
}
|
|
if (!isNumberFinite(value)) {
|
|
value = typeof parser === 'string'
|
|
? adapter.parse(value, parser)
|
|
: adapter.parse(value);
|
|
}
|
|
if (value === null) {
|
|
return null;
|
|
}
|
|
if (round) {
|
|
value = round === 'week' && (isNumber(isoWeekday) || isoWeekday === true)
|
|
? adapter.startOf(value, 'isoWeek', isoWeekday)
|
|
: adapter.startOf(value, round);
|
|
}
|
|
return +value;
|
|
}
|
|
function determineUnitForAutoTicks(minUnit, min, max, capacity) {
|
|
const ilen = UNITS.length;
|
|
for (let i = UNITS.indexOf(minUnit); i < ilen - 1; ++i) {
|
|
const interval = INTERVALS[UNITS[i]];
|
|
const factor = interval.steps ? interval.steps : Number.MAX_SAFE_INTEGER;
|
|
if (interval.common && Math.ceil((max - min) / (factor * interval.size)) <= capacity) {
|
|
return UNITS[i];
|
|
}
|
|
}
|
|
return UNITS[ilen - 1];
|
|
}
|
|
function determineUnitForFormatting(scale, numTicks, minUnit, min, max) {
|
|
for (let i = UNITS.length - 1; i >= UNITS.indexOf(minUnit); i--) {
|
|
const unit = UNITS[i];
|
|
if (INTERVALS[unit].common && scale._adapter.diff(max, min, unit) >= numTicks - 1) {
|
|
return unit;
|
|
}
|
|
}
|
|
return UNITS[minUnit ? UNITS.indexOf(minUnit) : 0];
|
|
}
|
|
function determineMajorUnit(unit) {
|
|
for (let i = UNITS.indexOf(unit) + 1, ilen = UNITS.length; i < ilen; ++i) {
|
|
if (INTERVALS[UNITS[i]].common) {
|
|
return UNITS[i];
|
|
}
|
|
}
|
|
}
|
|
function addTick(ticks, time, timestamps) {
|
|
if (!timestamps) {
|
|
ticks[time] = true;
|
|
} else if (timestamps.length) {
|
|
const {lo, hi} = _lookup(timestamps, time);
|
|
const timestamp = timestamps[lo] >= time ? timestamps[lo] : timestamps[hi];
|
|
ticks[timestamp] = true;
|
|
}
|
|
}
|
|
function setMajorTicks(scale, ticks, map, majorUnit) {
|
|
const adapter = scale._adapter;
|
|
const first = +adapter.startOf(ticks[0].value, majorUnit);
|
|
const last = ticks[ticks.length - 1].value;
|
|
let major, index;
|
|
for (major = first; major <= last; major = +adapter.add(major, 1, majorUnit)) {
|
|
index = map[major];
|
|
if (index >= 0) {
|
|
ticks[index].major = true;
|
|
}
|
|
}
|
|
return ticks;
|
|
}
|
|
function ticksFromTimestamps(scale, values, majorUnit) {
|
|
const ticks = [];
|
|
const map = {};
|
|
const ilen = values.length;
|
|
let i, value;
|
|
for (i = 0; i < ilen; ++i) {
|
|
value = values[i];
|
|
map[value] = i;
|
|
ticks.push({
|
|
value,
|
|
major: false
|
|
});
|
|
}
|
|
return (ilen === 0 || !majorUnit) ? ticks : setMajorTicks(scale, ticks, map, majorUnit);
|
|
}
|
|
class TimeScale extends Scale {
|
|
constructor(props) {
|
|
super(props);
|
|
this._cache = {
|
|
data: [],
|
|
labels: [],
|
|
all: []
|
|
};
|
|
this._unit = 'day';
|
|
this._majorUnit = undefined;
|
|
this._offsets = {};
|
|
this._normalized = false;
|
|
this._parseOpts = undefined;
|
|
}
|
|
init(scaleOpts, opts) {
|
|
const time = scaleOpts.time || (scaleOpts.time = {});
|
|
const adapter = this._adapter = new adapters._date(scaleOpts.adapters.date);
|
|
adapter.init(opts);
|
|
mergeIf(time.displayFormats, adapter.formats());
|
|
this._parseOpts = {
|
|
parser: time.parser,
|
|
round: time.round,
|
|
isoWeekday: time.isoWeekday
|
|
};
|
|
super.init(scaleOpts);
|
|
this._normalized = opts.normalized;
|
|
}
|
|
parse(raw, index) {
|
|
if (raw === undefined) {
|
|
return null;
|
|
}
|
|
return parse(this, raw);
|
|
}
|
|
beforeLayout() {
|
|
super.beforeLayout();
|
|
this._cache = {
|
|
data: [],
|
|
labels: [],
|
|
all: []
|
|
};
|
|
}
|
|
determineDataLimits() {
|
|
const options = this.options;
|
|
const adapter = this._adapter;
|
|
const unit = options.time.unit || 'day';
|
|
let {min, max, minDefined, maxDefined} = this.getUserBounds();
|
|
function _applyBounds(bounds) {
|
|
if (!minDefined && !isNaN(bounds.min)) {
|
|
min = Math.min(min, bounds.min);
|
|
}
|
|
if (!maxDefined && !isNaN(bounds.max)) {
|
|
max = Math.max(max, bounds.max);
|
|
}
|
|
}
|
|
if (!minDefined || !maxDefined) {
|
|
_applyBounds(this._getLabelBounds());
|
|
if (options.bounds !== 'ticks' || options.ticks.source !== 'labels') {
|
|
_applyBounds(this.getMinMax(false));
|
|
}
|
|
}
|
|
min = isNumberFinite(min) && !isNaN(min) ? min : +adapter.startOf(Date.now(), unit);
|
|
max = isNumberFinite(max) && !isNaN(max) ? max : +adapter.endOf(Date.now(), unit) + 1;
|
|
this.min = Math.min(min, max - 1);
|
|
this.max = Math.max(min + 1, max);
|
|
}
|
|
_getLabelBounds() {
|
|
const arr = this.getLabelTimestamps();
|
|
let min = Number.POSITIVE_INFINITY;
|
|
let max = Number.NEGATIVE_INFINITY;
|
|
if (arr.length) {
|
|
min = arr[0];
|
|
max = arr[arr.length - 1];
|
|
}
|
|
return {min, max};
|
|
}
|
|
buildTicks() {
|
|
const options = this.options;
|
|
const timeOpts = options.time;
|
|
const tickOpts = options.ticks;
|
|
const timestamps = tickOpts.source === 'labels' ? this.getLabelTimestamps() : this._generate();
|
|
if (options.bounds === 'ticks' && timestamps.length) {
|
|
this.min = this._userMin || timestamps[0];
|
|
this.max = this._userMax || timestamps[timestamps.length - 1];
|
|
}
|
|
const min = this.min;
|
|
const max = this.max;
|
|
const ticks = _filterBetween(timestamps, min, max);
|
|
this._unit = timeOpts.unit || (tickOpts.autoSkip
|
|
? determineUnitForAutoTicks(timeOpts.minUnit, this.min, this.max, this._getLabelCapacity(min))
|
|
: determineUnitForFormatting(this, ticks.length, timeOpts.minUnit, this.min, this.max));
|
|
this._majorUnit = !tickOpts.major.enabled || this._unit === 'year' ? undefined
|
|
: determineMajorUnit(this._unit);
|
|
this.initOffsets(timestamps);
|
|
if (options.reverse) {
|
|
ticks.reverse();
|
|
}
|
|
return ticksFromTimestamps(this, ticks, this._majorUnit);
|
|
}
|
|
afterAutoSkip() {
|
|
if (this.options.offsetAfterAutoskip) {
|
|
this.initOffsets(this.ticks.map(tick => +tick.value));
|
|
}
|
|
}
|
|
initOffsets(timestamps) {
|
|
let start = 0;
|
|
let end = 0;
|
|
let first, last;
|
|
if (this.options.offset && timestamps.length) {
|
|
first = this.getDecimalForValue(timestamps[0]);
|
|
if (timestamps.length === 1) {
|
|
start = 1 - first;
|
|
} else {
|
|
start = (this.getDecimalForValue(timestamps[1]) - first) / 2;
|
|
}
|
|
last = this.getDecimalForValue(timestamps[timestamps.length - 1]);
|
|
if (timestamps.length === 1) {
|
|
end = last;
|
|
} else {
|
|
end = (last - this.getDecimalForValue(timestamps[timestamps.length - 2])) / 2;
|
|
}
|
|
}
|
|
const limit = timestamps.length < 3 ? 0.5 : 0.25;
|
|
start = _limitValue(start, 0, limit);
|
|
end = _limitValue(end, 0, limit);
|
|
this._offsets = {start, end, factor: 1 / (start + 1 + end)};
|
|
}
|
|
_generate() {
|
|
const adapter = this._adapter;
|
|
const min = this.min;
|
|
const max = this.max;
|
|
const options = this.options;
|
|
const timeOpts = options.time;
|
|
const minor = timeOpts.unit || determineUnitForAutoTicks(timeOpts.minUnit, min, max, this._getLabelCapacity(min));
|
|
const stepSize = valueOrDefault(timeOpts.stepSize, 1);
|
|
const weekday = minor === 'week' ? timeOpts.isoWeekday : false;
|
|
const hasWeekday = isNumber(weekday) || weekday === true;
|
|
const ticks = {};
|
|
let first = min;
|
|
let time, count;
|
|
if (hasWeekday) {
|
|
first = +adapter.startOf(first, 'isoWeek', weekday);
|
|
}
|
|
first = +adapter.startOf(first, hasWeekday ? 'day' : minor);
|
|
if (adapter.diff(max, min, minor) > 100000 * stepSize) {
|
|
throw new Error(min + ' and ' + max + ' are too far apart with stepSize of ' + stepSize + ' ' + minor);
|
|
}
|
|
const timestamps = options.ticks.source === 'data' && this.getDataTimestamps();
|
|
for (time = first, count = 0; time < max; time = +adapter.add(time, stepSize, minor), count++) {
|
|
addTick(ticks, time, timestamps);
|
|
}
|
|
if (time === max || options.bounds === 'ticks' || count === 1) {
|
|
addTick(ticks, time, timestamps);
|
|
}
|
|
return Object.keys(ticks).sort((a, b) => a - b).map(x => +x);
|
|
}
|
|
getLabelForValue(value) {
|
|
const adapter = this._adapter;
|
|
const timeOpts = this.options.time;
|
|
if (timeOpts.tooltipFormat) {
|
|
return adapter.format(value, timeOpts.tooltipFormat);
|
|
}
|
|
return adapter.format(value, timeOpts.displayFormats.datetime);
|
|
}
|
|
_tickFormatFunction(time, index, ticks, format) {
|
|
const options = this.options;
|
|
const formats = options.time.displayFormats;
|
|
const unit = this._unit;
|
|
const majorUnit = this._majorUnit;
|
|
const minorFormat = unit && formats[unit];
|
|
const majorFormat = majorUnit && formats[majorUnit];
|
|
const tick = ticks[index];
|
|
const major = majorUnit && majorFormat && tick && tick.major;
|
|
const label = this._adapter.format(time, format || (major ? majorFormat : minorFormat));
|
|
const formatter = options.ticks.callback;
|
|
return formatter ? callback(formatter, [label, index, ticks], this) : label;
|
|
}
|
|
generateTickLabels(ticks) {
|
|
let i, ilen, tick;
|
|
for (i = 0, ilen = ticks.length; i < ilen; ++i) {
|
|
tick = ticks[i];
|
|
tick.label = this._tickFormatFunction(tick.value, i, ticks);
|
|
}
|
|
}
|
|
getDecimalForValue(value) {
|
|
return value === null ? NaN : (value - this.min) / (this.max - this.min);
|
|
}
|
|
getPixelForValue(value) {
|
|
const offsets = this._offsets;
|
|
const pos = this.getDecimalForValue(value);
|
|
return this.getPixelForDecimal((offsets.start + pos) * offsets.factor);
|
|
}
|
|
getValueForPixel(pixel) {
|
|
const offsets = this._offsets;
|
|
const pos = this.getDecimalForPixel(pixel) / offsets.factor - offsets.end;
|
|
return this.min + pos * (this.max - this.min);
|
|
}
|
|
_getLabelSize(label) {
|
|
const ticksOpts = this.options.ticks;
|
|
const tickLabelWidth = this.ctx.measureText(label).width;
|
|
const angle = toRadians(this.isHorizontal() ? ticksOpts.maxRotation : ticksOpts.minRotation);
|
|
const cosRotation = Math.cos(angle);
|
|
const sinRotation = Math.sin(angle);
|
|
const tickFontSize = this._resolveTickFontOptions(0).size;
|
|
return {
|
|
w: (tickLabelWidth * cosRotation) + (tickFontSize * sinRotation),
|
|
h: (tickLabelWidth * sinRotation) + (tickFontSize * cosRotation)
|
|
};
|
|
}
|
|
_getLabelCapacity(exampleTime) {
|
|
const timeOpts = this.options.time;
|
|
const displayFormats = timeOpts.displayFormats;
|
|
const format = displayFormats[timeOpts.unit] || displayFormats.millisecond;
|
|
const exampleLabel = this._tickFormatFunction(exampleTime, 0, ticksFromTimestamps(this, [exampleTime], this._majorUnit), format);
|
|
const size = this._getLabelSize(exampleLabel);
|
|
const capacity = Math.floor(this.isHorizontal() ? this.width / size.w : this.height / size.h) - 1;
|
|
return capacity > 0 ? capacity : 1;
|
|
}
|
|
getDataTimestamps() {
|
|
let timestamps = this._cache.data || [];
|
|
let i, ilen;
|
|
if (timestamps.length) {
|
|
return timestamps;
|
|
}
|
|
const metas = this.getMatchingVisibleMetas();
|
|
if (this._normalized && metas.length) {
|
|
return (this._cache.data = metas[0].controller.getAllParsedValues(this));
|
|
}
|
|
for (i = 0, ilen = metas.length; i < ilen; ++i) {
|
|
timestamps = timestamps.concat(metas[i].controller.getAllParsedValues(this));
|
|
}
|
|
return (this._cache.data = this.normalize(timestamps));
|
|
}
|
|
getLabelTimestamps() {
|
|
const timestamps = this._cache.labels || [];
|
|
let i, ilen;
|
|
if (timestamps.length) {
|
|
return timestamps;
|
|
}
|
|
const labels = this.getLabels();
|
|
for (i = 0, ilen = labels.length; i < ilen; ++i) {
|
|
timestamps.push(parse(this, labels[i]));
|
|
}
|
|
return (this._cache.labels = this._normalized ? timestamps : this.normalize(timestamps));
|
|
}
|
|
normalize(values) {
|
|
return _arrayUnique(values.sort(sorter));
|
|
}
|
|
}
|
|
TimeScale.id = 'time';
|
|
TimeScale.defaults = {
|
|
bounds: 'data',
|
|
adapters: {},
|
|
time: {
|
|
parser: false,
|
|
unit: false,
|
|
round: false,
|
|
isoWeekday: false,
|
|
minUnit: 'millisecond',
|
|
displayFormats: {}
|
|
},
|
|
ticks: {
|
|
source: 'auto',
|
|
major: {
|
|
enabled: false
|
|
}
|
|
}
|
|
};
|
|
|
|
function interpolate(table, val, reverse) {
|
|
let lo = 0;
|
|
let hi = table.length - 1;
|
|
let prevSource, nextSource, prevTarget, nextTarget;
|
|
if (reverse) {
|
|
if (val >= table[lo].pos && val <= table[hi].pos) {
|
|
({lo, hi} = _lookupByKey(table, 'pos', val));
|
|
}
|
|
({pos: prevSource, time: prevTarget} = table[lo]);
|
|
({pos: nextSource, time: nextTarget} = table[hi]);
|
|
} else {
|
|
if (val >= table[lo].time && val <= table[hi].time) {
|
|
({lo, hi} = _lookupByKey(table, 'time', val));
|
|
}
|
|
({time: prevSource, pos: prevTarget} = table[lo]);
|
|
({time: nextSource, pos: nextTarget} = table[hi]);
|
|
}
|
|
const span = nextSource - prevSource;
|
|
return span ? prevTarget + (nextTarget - prevTarget) * (val - prevSource) / span : prevTarget;
|
|
}
|
|
class TimeSeriesScale extends TimeScale {
|
|
constructor(props) {
|
|
super(props);
|
|
this._table = [];
|
|
this._minPos = undefined;
|
|
this._tableRange = undefined;
|
|
}
|
|
initOffsets() {
|
|
const timestamps = this._getTimestampsForTable();
|
|
const table = this._table = this.buildLookupTable(timestamps);
|
|
this._minPos = interpolate(table, this.min);
|
|
this._tableRange = interpolate(table, this.max) - this._minPos;
|
|
super.initOffsets(timestamps);
|
|
}
|
|
buildLookupTable(timestamps) {
|
|
const {min, max} = this;
|
|
const items = [];
|
|
const table = [];
|
|
let i, ilen, prev, curr, next;
|
|
for (i = 0, ilen = timestamps.length; i < ilen; ++i) {
|
|
curr = timestamps[i];
|
|
if (curr >= min && curr <= max) {
|
|
items.push(curr);
|
|
}
|
|
}
|
|
if (items.length < 2) {
|
|
return [
|
|
{time: min, pos: 0},
|
|
{time: max, pos: 1}
|
|
];
|
|
}
|
|
for (i = 0, ilen = items.length; i < ilen; ++i) {
|
|
next = items[i + 1];
|
|
prev = items[i - 1];
|
|
curr = items[i];
|
|
if (Math.round((next + prev) / 2) !== curr) {
|
|
table.push({time: curr, pos: i / (ilen - 1)});
|
|
}
|
|
}
|
|
return table;
|
|
}
|
|
_getTimestampsForTable() {
|
|
let timestamps = this._cache.all || [];
|
|
if (timestamps.length) {
|
|
return timestamps;
|
|
}
|
|
const data = this.getDataTimestamps();
|
|
const label = this.getLabelTimestamps();
|
|
if (data.length && label.length) {
|
|
timestamps = this.normalize(data.concat(label));
|
|
} else {
|
|
timestamps = data.length ? data : label;
|
|
}
|
|
timestamps = this._cache.all = timestamps;
|
|
return timestamps;
|
|
}
|
|
getDecimalForValue(value) {
|
|
return (interpolate(this._table, value) - this._minPos) / this._tableRange;
|
|
}
|
|
getValueForPixel(pixel) {
|
|
const offsets = this._offsets;
|
|
const decimal = this.getDecimalForPixel(pixel) / offsets.factor - offsets.end;
|
|
return interpolate(this._table, decimal * this._tableRange + this._minPos, true);
|
|
}
|
|
}
|
|
TimeSeriesScale.id = 'timeseries';
|
|
TimeSeriesScale.defaults = TimeScale.defaults;
|
|
|
|
var scales = /*#__PURE__*/Object.freeze({
|
|
__proto__: null,
|
|
CategoryScale: CategoryScale,
|
|
LinearScale: LinearScale,
|
|
LogarithmicScale: LogarithmicScale,
|
|
RadialLinearScale: RadialLinearScale,
|
|
TimeScale: TimeScale,
|
|
TimeSeriesScale: TimeSeriesScale
|
|
});
|
|
|
|
const registerables = [
|
|
controllers,
|
|
elements,
|
|
plugins,
|
|
scales,
|
|
];
|
|
|
|
export { Animation, Animations, ArcElement, BarController, BarElement, BasePlatform, BasicPlatform, BubbleController, CategoryScale, Chart, DatasetController, plugin_decimation as Decimation, DomPlatform, DoughnutController, Element, index as Filler, Interaction, plugin_legend as Legend, LineController, LineElement, LinearScale, LogarithmicScale, PieController, PointElement, PolarAreaController, RadarController, RadialLinearScale, Scale, ScatterController, plugin_subtitle as SubTitle, Ticks, TimeScale, TimeSeriesScale, plugin_title as Title, plugin_tooltip as Tooltip, adapters as _adapters, _detectPlatform, animator, controllers, elements, layouts, plugins, registerables, registry, scales };
|