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newsroom/node_modules/chart.js/dist/chunks/helpers.dataset.cjs

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/*!
* Chart.js v4.5.1
* https://www.chartjs.org
* (c) 2025 Chart.js Contributors
* Released under the MIT License
*/
'use strict';
var color$1 = require('@kurkle/color');
/**
* @namespace Chart.helpers
*/ /**
* An empty function that can be used, for example, for optional callback.
*/ function noop() {
/* noop */ }
/**
* Returns a unique id, sequentially generated from a global variable.
*/ const uid = (()=>{
let id = 0;
return ()=>id++;
})();
/**
* Returns true if `value` is neither null nor undefined, else returns false.
* @param value - The value to test.
* @since 2.7.0
*/ function isNullOrUndef(value) {
return value === null || value === undefined;
}
/**
* Returns true if `value` is an array (including typed arrays), else returns false.
* @param value - The value to test.
* @function
*/ function isArray(value) {
if (Array.isArray && Array.isArray(value)) {
return true;
}
const type = Object.prototype.toString.call(value);
if (type.slice(0, 7) === '[object' && type.slice(-6) === 'Array]') {
return true;
}
return false;
}
/**
* Returns true if `value` is an object (excluding null), else returns false.
* @param value - The value to test.
* @since 2.7.0
*/ function isObject(value) {
return value !== null && Object.prototype.toString.call(value) === '[object Object]';
}
/**
* Returns true if `value` is a finite number, else returns false
* @param value - The value to test.
*/ function isNumberFinite(value) {
return (typeof value === 'number' || value instanceof Number) && isFinite(+value);
}
/**
* Returns `value` if finite, else returns `defaultValue`.
* @param value - The value to return if defined.
* @param defaultValue - The value to return if `value` is not finite.
*/ function finiteOrDefault(value, defaultValue) {
return isNumberFinite(value) ? value : defaultValue;
}
/**
* Returns `value` if defined, else returns `defaultValue`.
* @param value - The value to return if defined.
* @param defaultValue - The value to return if `value` is undefined.
*/ function valueOrDefault(value, defaultValue) {
return typeof value === 'undefined' ? defaultValue : value;
}
const toPercentage = (value, dimension)=>typeof value === 'string' && value.endsWith('%') ? parseFloat(value) / 100 : +value / dimension;
const toDimension = (value, dimension)=>typeof value === 'string' && value.endsWith('%') ? parseFloat(value) / 100 * dimension : +value;
/**
* Calls `fn` with the given `args` in the scope defined by `thisArg` and returns the
* value returned by `fn`. If `fn` is not a function, this method returns undefined.
* @param fn - The function to call.
* @param args - The arguments with which `fn` should be called.
* @param [thisArg] - The value of `this` provided for the call to `fn`.
*/ function callback(fn, args, thisArg) {
if (fn && typeof fn.call === 'function') {
return fn.apply(thisArg, args);
}
}
function each(loopable, fn, thisArg, reverse) {
let i, len, keys;
if (isArray(loopable)) {
len = loopable.length;
if (reverse) {
for(i = len - 1; i >= 0; i--){
fn.call(thisArg, loopable[i], i);
}
} else {
for(i = 0; i < len; i++){
fn.call(thisArg, loopable[i], i);
}
}
} else if (isObject(loopable)) {
keys = Object.keys(loopable);
len = keys.length;
for(i = 0; i < len; i++){
fn.call(thisArg, loopable[keys[i]], keys[i]);
}
}
}
/**
* Returns true if the `a0` and `a1` arrays have the same content, else returns false.
* @param a0 - The array to compare
* @param a1 - The array to compare
* @private
*/ function _elementsEqual(a0, a1) {
let i, ilen, v0, v1;
if (!a0 || !a1 || a0.length !== a1.length) {
return false;
}
for(i = 0, ilen = a0.length; i < ilen; ++i){
v0 = a0[i];
v1 = a1[i];
if (v0.datasetIndex !== v1.datasetIndex || v0.index !== v1.index) {
return false;
}
}
return true;
}
/**
* Returns a deep copy of `source` without keeping references on objects and arrays.
* @param source - The value to clone.
*/ function clone(source) {
if (isArray(source)) {
return source.map(clone);
}
if (isObject(source)) {
const target = Object.create(null);
const keys = Object.keys(source);
const klen = keys.length;
let k = 0;
for(; k < klen; ++k){
target[keys[k]] = clone(source[keys[k]]);
}
return target;
}
return source;
}
function isValidKey(key) {
return [
'__proto__',
'prototype',
'constructor'
].indexOf(key) === -1;
}
/**
* The default merger when Chart.helpers.merge is called without merger option.
* Note(SB): also used by mergeConfig and mergeScaleConfig as fallback.
* @private
*/ function _merger(key, target, source, options) {
if (!isValidKey(key)) {
return;
}
const tval = target[key];
const sval = source[key];
if (isObject(tval) && isObject(sval)) {
// eslint-disable-next-line @typescript-eslint/no-use-before-define
merge(tval, sval, options);
} else {
target[key] = clone(sval);
}
}
function merge(target, source, options) {
const sources = isArray(source) ? source : [
source
];
const ilen = sources.length;
if (!isObject(target)) {
return target;
}
options = options || {};
const merger = options.merger || _merger;
let current;
for(let i = 0; i < ilen; ++i){
current = sources[i];
if (!isObject(current)) {
continue;
}
const keys = Object.keys(current);
for(let k = 0, klen = keys.length; k < klen; ++k){
merger(keys[k], target, current, options);
}
}
return target;
}
function mergeIf(target, source) {
// eslint-disable-next-line @typescript-eslint/no-use-before-define
return merge(target, source, {
merger: _mergerIf
});
}
/**
* Merges source[key] in target[key] only if target[key] is undefined.
* @private
*/ function _mergerIf(key, target, source) {
if (!isValidKey(key)) {
return;
}
const tval = target[key];
const sval = source[key];
if (isObject(tval) && isObject(sval)) {
mergeIf(tval, sval);
} else if (!Object.prototype.hasOwnProperty.call(target, key)) {
target[key] = clone(sval);
}
}
/**
* @private
*/ function _deprecated(scope, value, previous, current) {
if (value !== undefined) {
console.warn(scope + ': "' + previous + '" is deprecated. Please use "' + current + '" instead');
}
}
// resolveObjectKey resolver cache
const keyResolvers = {
// Chart.helpers.core resolveObjectKey should resolve empty key to root object
'': (v)=>v,
// default resolvers
x: (o)=>o.x,
y: (o)=>o.y
};
/**
* @private
*/ function _splitKey(key) {
const parts = key.split('.');
const keys = [];
let tmp = '';
for (const part of parts){
tmp += part;
if (tmp.endsWith('\\')) {
tmp = tmp.slice(0, -1) + '.';
} else {
keys.push(tmp);
tmp = '';
}
}
return keys;
}
function _getKeyResolver(key) {
const keys = _splitKey(key);
return (obj)=>{
for (const k of keys){
if (k === '') {
break;
}
obj = obj && obj[k];
}
return obj;
};
}
function resolveObjectKey(obj, key) {
const resolver = keyResolvers[key] || (keyResolvers[key] = _getKeyResolver(key));
return resolver(obj);
}
/**
* @private
*/ function _capitalize(str) {
return str.charAt(0).toUpperCase() + str.slice(1);
}
const defined = (value)=>typeof value !== 'undefined';
const isFunction = (value)=>typeof value === 'function';
// Adapted from https://stackoverflow.com/questions/31128855/comparing-ecma6-sets-for-equality#31129384
const setsEqual = (a, b)=>{
if (a.size !== b.size) {
return false;
}
for (const item of a){
if (!b.has(item)) {
return false;
}
}
return true;
};
/**
* @param e - The event
* @private
*/ function _isClickEvent(e) {
return e.type === 'mouseup' || e.type === 'click' || e.type === 'contextmenu';
}
/**
* @alias Chart.helpers.math
* @namespace
*/ const PI = Math.PI;
const TAU = 2 * PI;
const PITAU = TAU + PI;
const INFINITY = Number.POSITIVE_INFINITY;
const RAD_PER_DEG = PI / 180;
const HALF_PI = PI / 2;
const QUARTER_PI = PI / 4;
const TWO_THIRDS_PI = PI * 2 / 3;
const log10 = Math.log10;
const sign = Math.sign;
function almostEquals(x, y, epsilon) {
return Math.abs(x - y) < epsilon;
}
/**
* Implementation of the nice number algorithm used in determining where axis labels will go
*/ function niceNum(range) {
const roundedRange = Math.round(range);
range = almostEquals(range, roundedRange, range / 1000) ? roundedRange : range;
const niceRange = Math.pow(10, Math.floor(log10(range)));
const fraction = range / niceRange;
const niceFraction = fraction <= 1 ? 1 : fraction <= 2 ? 2 : fraction <= 5 ? 5 : 10;
return niceFraction * niceRange;
}
/**
* Returns an array of factors sorted from 1 to sqrt(value)
* @private
*/ function _factorize(value) {
const result = [];
const sqrt = Math.sqrt(value);
let i;
for(i = 1; i < sqrt; i++){
if (value % i === 0) {
result.push(i);
result.push(value / i);
}
}
if (sqrt === (sqrt | 0)) {
result.push(sqrt);
}
result.sort((a, b)=>a - b).pop();
return result;
}
/**
* Verifies that attempting to coerce n to string or number won't throw a TypeError.
*/ function isNonPrimitive(n) {
return typeof n === 'symbol' || typeof n === 'object' && n !== null && !(Symbol.toPrimitive in n || 'toString' in n || 'valueOf' in n);
}
function isNumber(n) {
return !isNonPrimitive(n) && !isNaN(parseFloat(n)) && isFinite(n);
}
function almostWhole(x, epsilon) {
const rounded = Math.round(x);
return rounded - epsilon <= x && rounded + epsilon >= x;
}
/**
* @private
*/ function _setMinAndMaxByKey(array, target, property) {
let i, ilen, value;
for(i = 0, ilen = array.length; i < ilen; i++){
value = array[i][property];
if (!isNaN(value)) {
target.min = Math.min(target.min, value);
target.max = Math.max(target.max, value);
}
}
}
function toRadians(degrees) {
return degrees * (PI / 180);
}
function toDegrees(radians) {
return radians * (180 / PI);
}
/**
* Returns the number of decimal places
* i.e. the number of digits after the decimal point, of the value of this Number.
* @param x - A number.
* @returns The number of decimal places.
* @private
*/ function _decimalPlaces(x) {
if (!isNumberFinite(x)) {
return;
}
let e = 1;
let p = 0;
while(Math.round(x * e) / e !== x){
e *= 10;
p++;
}
return p;
}
// Gets the angle from vertical upright to the point about a centre.
function getAngleFromPoint(centrePoint, anglePoint) {
const distanceFromXCenter = anglePoint.x - centrePoint.x;
const distanceFromYCenter = anglePoint.y - centrePoint.y;
const radialDistanceFromCenter = Math.sqrt(distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter);
let angle = Math.atan2(distanceFromYCenter, distanceFromXCenter);
if (angle < -0.5 * PI) {
angle += TAU; // make sure the returned angle is in the range of (-PI/2, 3PI/2]
}
return {
angle,
distance: radialDistanceFromCenter
};
}
function distanceBetweenPoints(pt1, pt2) {
return Math.sqrt(Math.pow(pt2.x - pt1.x, 2) + Math.pow(pt2.y - pt1.y, 2));
}
/**
* Shortest distance between angles, in either direction.
* @private
*/ function _angleDiff(a, b) {
return (a - b + PITAU) % TAU - PI;
}
/**
* Normalize angle to be between 0 and 2*PI
* @private
*/ function _normalizeAngle(a) {
return (a % TAU + TAU) % TAU;
}
/**
* @private
*/ function _angleBetween(angle, start, end, sameAngleIsFullCircle) {
const a = _normalizeAngle(angle);
const s = _normalizeAngle(start);
const e = _normalizeAngle(end);
const angleToStart = _normalizeAngle(s - a);
const angleToEnd = _normalizeAngle(e - a);
const startToAngle = _normalizeAngle(a - s);
const endToAngle = _normalizeAngle(a - e);
return a === s || a === e || sameAngleIsFullCircle && s === e || angleToStart > angleToEnd && startToAngle < endToAngle;
}
/**
* Limit `value` between `min` and `max`
* @param value
* @param min
* @param max
* @private
*/ function _limitValue(value, min, max) {
return Math.max(min, Math.min(max, value));
}
/**
* @param {number} value
* @private
*/ function _int16Range(value) {
return _limitValue(value, -32768, 32767);
}
/**
* @param value
* @param start
* @param end
* @param [epsilon]
* @private
*/ function _isBetween(value, start, end, epsilon = 1e-6) {
return value >= Math.min(start, end) - epsilon && value <= Math.max(start, end) + epsilon;
}
function _lookup(table, value, cmp) {
cmp = cmp || ((index)=>table[index] < value);
let hi = table.length - 1;
let lo = 0;
let mid;
while(hi - lo > 1){
mid = lo + hi >> 1;
if (cmp(mid)) {
lo = mid;
} else {
hi = mid;
}
}
return {
lo,
hi
};
}
/**
* Binary search
* @param table - the table search. must be sorted!
* @param key - property name for the value in each entry
* @param value - value to find
* @param last - lookup last index
* @private
*/ const _lookupByKey = (table, key, value, last)=>_lookup(table, value, last ? (index)=>{
const ti = table[index][key];
return ti < value || ti === value && table[index + 1][key] === value;
} : (index)=>table[index][key] < value);
/**
* Reverse binary search
* @param table - the table search. must be sorted!
* @param key - property name for the value in each entry
* @param value - value to find
* @private
*/ const _rlookupByKey = (table, key, value)=>_lookup(table, value, (index)=>table[index][key] >= value);
/**
* Return subset of `values` between `min` and `max` inclusive.
* Values are assumed to be in sorted order.
* @param values - sorted array of values
* @param min - min value
* @param max - max value
*/ function _filterBetween(values, min, max) {
let start = 0;
let end = values.length;
while(start < end && values[start] < min){
start++;
}
while(end > start && values[end - 1] > max){
end--;
}
return start > 0 || end < values.length ? values.slice(start, end) : values;
}
const arrayEvents = [
'push',
'pop',
'shift',
'splice',
'unshift'
];
function listenArrayEvents(array, listener) {
if (array._chartjs) {
array._chartjs.listeners.push(listener);
return;
}
Object.defineProperty(array, '_chartjs', {
configurable: true,
enumerable: false,
value: {
listeners: [
listener
]
}
});
arrayEvents.forEach((key)=>{
const method = '_onData' + _capitalize(key);
const base = array[key];
Object.defineProperty(array, key, {
configurable: true,
enumerable: false,
value (...args) {
const res = base.apply(this, args);
array._chartjs.listeners.forEach((object)=>{
if (typeof object[method] === 'function') {
object[method](...args);
}
});
return res;
}
});
});
}
function unlistenArrayEvents(array, listener) {
const stub = array._chartjs;
if (!stub) {
return;
}
const listeners = stub.listeners;
const index = listeners.indexOf(listener);
if (index !== -1) {
listeners.splice(index, 1);
}
if (listeners.length > 0) {
return;
}
arrayEvents.forEach((key)=>{
delete array[key];
});
delete array._chartjs;
}
/**
* @param items
*/ function _arrayUnique(items) {
const set = new Set(items);
if (set.size === items.length) {
return items;
}
return Array.from(set);
}
function fontString(pixelSize, fontStyle, fontFamily) {
return fontStyle + ' ' + pixelSize + 'px ' + fontFamily;
}
/**
* Request animation polyfill
*/ const requestAnimFrame = function() {
if (typeof window === 'undefined') {
return function(callback) {
return callback();
};
}
return window.requestAnimationFrame;
}();
/**
* Throttles calling `fn` once per animation frame
* Latest arguments are used on the actual call
*/ function throttled(fn, thisArg) {
let argsToUse = [];
let ticking = false;
return function(...args) {
// Save the args for use later
argsToUse = args;
if (!ticking) {
ticking = true;
requestAnimFrame.call(window, ()=>{
ticking = false;
fn.apply(thisArg, argsToUse);
});
}
};
}
/**
* Debounces calling `fn` for `delay` ms
*/ function debounce(fn, delay) {
let timeout;
return function(...args) {
if (delay) {
clearTimeout(timeout);
timeout = setTimeout(fn, delay, args);
} else {
fn.apply(this, args);
}
return delay;
};
}
/**
* Converts 'start' to 'left', 'end' to 'right' and others to 'center'
* @private
*/ const _toLeftRightCenter = (align)=>align === 'start' ? 'left' : align === 'end' ? 'right' : 'center';
/**
* Returns `start`, `end` or `(start + end) / 2` depending on `align`. Defaults to `center`
* @private
*/ const _alignStartEnd = (align, start, end)=>align === 'start' ? start : align === 'end' ? end : (start + end) / 2;
/**
* Returns `left`, `right` or `(left + right) / 2` depending on `align`. Defaults to `left`
* @private
*/ const _textX = (align, left, right, rtl)=>{
const check = rtl ? 'left' : 'right';
return align === check ? right : align === 'center' ? (left + right) / 2 : left;
};
/**
* Return start and count of visible points.
* @private
*/ function _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled) {
const pointCount = points.length;
let start = 0;
let count = pointCount;
if (meta._sorted) {
const { iScale , vScale , _parsed } = meta;
const spanGaps = meta.dataset ? meta.dataset.options ? meta.dataset.options.spanGaps : null : null;
const axis = iScale.axis;
const { min , max , minDefined , maxDefined } = iScale.getUserBounds();
if (minDefined) {
start = Math.min(// @ts-expect-error Need to type _parsed
_lookupByKey(_parsed, axis, min).lo, // @ts-expect-error Need to fix types on _lookupByKey
animationsDisabled ? pointCount : _lookupByKey(points, axis, iScale.getPixelForValue(min)).lo);
if (spanGaps) {
const distanceToDefinedLo = _parsed.slice(0, start + 1).reverse().findIndex((point)=>!isNullOrUndef(point[vScale.axis]));
start -= Math.max(0, distanceToDefinedLo);
}
start = _limitValue(start, 0, pointCount - 1);
}
if (maxDefined) {
let end = Math.max(// @ts-expect-error Need to type _parsed
_lookupByKey(_parsed, iScale.axis, max, true).hi + 1, // @ts-expect-error Need to fix types on _lookupByKey
animationsDisabled ? 0 : _lookupByKey(points, axis, iScale.getPixelForValue(max), true).hi + 1);
if (spanGaps) {
const distanceToDefinedHi = _parsed.slice(end - 1).findIndex((point)=>!isNullOrUndef(point[vScale.axis]));
end += Math.max(0, distanceToDefinedHi);
}
count = _limitValue(end, start, pointCount) - start;
} else {
count = pointCount - start;
}
}
return {
start,
count
};
}
/**
* Checks if the scale ranges have changed.
* @param {object} meta - dataset meta.
* @returns {boolean}
* @private
*/ function _scaleRangesChanged(meta) {
const { xScale , yScale , _scaleRanges } = meta;
const newRanges = {
xmin: xScale.min,
xmax: xScale.max,
ymin: yScale.min,
ymax: yScale.max
};
if (!_scaleRanges) {
meta._scaleRanges = newRanges;
return true;
}
const changed = _scaleRanges.xmin !== xScale.min || _scaleRanges.xmax !== xScale.max || _scaleRanges.ymin !== yScale.min || _scaleRanges.ymax !== yScale.max;
Object.assign(_scaleRanges, newRanges);
return changed;
}
const atEdge = (t)=>t === 0 || t === 1;
const elasticIn = (t, s, p)=>-(Math.pow(2, 10 * (t -= 1)) * Math.sin((t - s) * TAU / p));
const elasticOut = (t, s, p)=>Math.pow(2, -10 * t) * Math.sin((t - s) * TAU / p) + 1;
/**
* Easing functions adapted from Robert Penner's easing equations.
* @namespace Chart.helpers.easing.effects
* @see http://www.robertpenner.com/easing/
*/ const effects = {
linear: (t)=>t,
easeInQuad: (t)=>t * t,
easeOutQuad: (t)=>-t * (t - 2),
easeInOutQuad: (t)=>(t /= 0.5) < 1 ? 0.5 * t * t : -0.5 * (--t * (t - 2) - 1),
easeInCubic: (t)=>t * t * t,
easeOutCubic: (t)=>(t -= 1) * t * t + 1,
easeInOutCubic: (t)=>(t /= 0.5) < 1 ? 0.5 * t * t * t : 0.5 * ((t -= 2) * t * t + 2),
easeInQuart: (t)=>t * t * t * t,
easeOutQuart: (t)=>-((t -= 1) * t * t * t - 1),
easeInOutQuart: (t)=>(t /= 0.5) < 1 ? 0.5 * t * t * t * t : -0.5 * ((t -= 2) * t * t * t - 2),
easeInQuint: (t)=>t * t * t * t * t,
easeOutQuint: (t)=>(t -= 1) * t * t * t * t + 1,
easeInOutQuint: (t)=>(t /= 0.5) < 1 ? 0.5 * t * t * t * t * t : 0.5 * ((t -= 2) * t * t * t * t + 2),
easeInSine: (t)=>-Math.cos(t * HALF_PI) + 1,
easeOutSine: (t)=>Math.sin(t * HALF_PI),
easeInOutSine: (t)=>-0.5 * (Math.cos(PI * t) - 1),
easeInExpo: (t)=>t === 0 ? 0 : Math.pow(2, 10 * (t - 1)),
easeOutExpo: (t)=>t === 1 ? 1 : -Math.pow(2, -10 * t) + 1,
easeInOutExpo: (t)=>atEdge(t) ? t : t < 0.5 ? 0.5 * Math.pow(2, 10 * (t * 2 - 1)) : 0.5 * (-Math.pow(2, -10 * (t * 2 - 1)) + 2),
easeInCirc: (t)=>t >= 1 ? t : -(Math.sqrt(1 - t * t) - 1),
easeOutCirc: (t)=>Math.sqrt(1 - (t -= 1) * t),
easeInOutCirc: (t)=>(t /= 0.5) < 1 ? -0.5 * (Math.sqrt(1 - t * t) - 1) : 0.5 * (Math.sqrt(1 - (t -= 2) * t) + 1),
easeInElastic: (t)=>atEdge(t) ? t : elasticIn(t, 0.075, 0.3),
easeOutElastic: (t)=>atEdge(t) ? t : elasticOut(t, 0.075, 0.3),
easeInOutElastic (t) {
const s = 0.1125;
const p = 0.45;
return atEdge(t) ? t : t < 0.5 ? 0.5 * elasticIn(t * 2, s, p) : 0.5 + 0.5 * elasticOut(t * 2 - 1, s, p);
},
easeInBack (t) {
const s = 1.70158;
return t * t * ((s + 1) * t - s);
},
easeOutBack (t) {
const s = 1.70158;
return (t -= 1) * t * ((s + 1) * t + s) + 1;
},
easeInOutBack (t) {
let s = 1.70158;
if ((t /= 0.5) < 1) {
return 0.5 * (t * t * (((s *= 1.525) + 1) * t - s));
}
return 0.5 * ((t -= 2) * t * (((s *= 1.525) + 1) * t + s) + 2);
},
easeInBounce: (t)=>1 - effects.easeOutBounce(1 - t),
easeOutBounce (t) {
const m = 7.5625;
const d = 2.75;
if (t < 1 / d) {
return m * t * t;
}
if (t < 2 / d) {
return m * (t -= 1.5 / d) * t + 0.75;
}
if (t < 2.5 / d) {
return m * (t -= 2.25 / d) * t + 0.9375;
}
return m * (t -= 2.625 / d) * t + 0.984375;
},
easeInOutBounce: (t)=>t < 0.5 ? effects.easeInBounce(t * 2) * 0.5 : effects.easeOutBounce(t * 2 - 1) * 0.5 + 0.5
};
function isPatternOrGradient(value) {
if (value && typeof value === 'object') {
const type = value.toString();
return type === '[object CanvasPattern]' || type === '[object CanvasGradient]';
}
return false;
}
function color(value) {
return isPatternOrGradient(value) ? value : new color$1.Color(value);
}
function getHoverColor(value) {
return isPatternOrGradient(value) ? value : new color$1.Color(value).saturate(0.5).darken(0.1).hexString();
}
const numbers = [
'x',
'y',
'borderWidth',
'radius',
'tension'
];
const colors = [
'color',
'borderColor',
'backgroundColor'
];
function applyAnimationsDefaults(defaults) {
defaults.set('animation', {
delay: undefined,
duration: 1000,
easing: 'easeOutQuart',
fn: undefined,
from: undefined,
loop: undefined,
to: undefined,
type: undefined
});
defaults.describe('animation', {
_fallback: false,
_indexable: false,
_scriptable: (name)=>name !== 'onProgress' && name !== 'onComplete' && name !== 'fn'
});
defaults.set('animations', {
colors: {
type: 'color',
properties: colors
},
numbers: {
type: 'number',
properties: numbers
}
});
defaults.describe('animations', {
_fallback: 'animation'
});
defaults.set('transitions', {
active: {
animation: {
duration: 400
}
},
resize: {
animation: {
duration: 0
}
},
show: {
animations: {
colors: {
from: 'transparent'
},
visible: {
type: 'boolean',
duration: 0
}
}
},
hide: {
animations: {
colors: {
to: 'transparent'
},
visible: {
type: 'boolean',
easing: 'linear',
fn: (v)=>v | 0
}
}
}
});
}
function applyLayoutsDefaults(defaults) {
defaults.set('layout', {
autoPadding: true,
padding: {
top: 0,
right: 0,
bottom: 0,
left: 0
}
});
}
const intlCache = new Map();
function getNumberFormat(locale, options) {
options = options || {};
const cacheKey = locale + JSON.stringify(options);
let formatter = intlCache.get(cacheKey);
if (!formatter) {
formatter = new Intl.NumberFormat(locale, options);
intlCache.set(cacheKey, formatter);
}
return formatter;
}
function formatNumber(num, locale, options) {
return getNumberFormat(locale, options).format(num);
}
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 = isNaN(logDelta) ? 1 : 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 = ticks[index].significand || tickValue / Math.pow(10, Math.floor(log10(tickValue)));
if ([
1,
2,
3,
5,
10,
15
].includes(remain) || index > 0.8 * ticks.length) {
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
};
function applyScaleDefaults(defaults) {
defaults.set('scale', {
display: true,
offset: false,
reverse: false,
beginAtZero: false,
bounds: 'ticks',
clip: true,
grace: 0,
grid: {
display: true,
lineWidth: 1,
drawOnChartArea: true,
drawTicks: true,
tickLength: 8,
tickWidth: (_ctx, options)=>options.lineWidth,
tickColor: (_ctx, options)=>options.color,
offset: false
},
border: {
display: true,
dash: [],
dashOffset: 0.0,
width: 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.border', 'color', '', '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' && name !== 'dash'
});
defaults.describe('scales', {
_fallback: 'scale'
});
defaults.describe('scale.ticks', {
_scriptable: (name)=>name !== 'backdropPadding' && name !== 'callback',
_indexable: (name)=>name !== 'backdropPadding'
});
}
const overrides = Object.create(null);
const descriptors = Object.create(null);
function getScope$1(node, key) {
if (!key) {
return node;
}
const keys = key.split('.');
for(let i = 0, n = keys.length; i < n; ++i){
const k = keys[i];
node = node[k] || (node[k] = Object.create(null));
}
return node;
}
function set(root, scope, values) {
if (typeof scope === 'string') {
return merge(getScope$1(root, scope), values);
}
return merge(getScope$1(root, ''), scope);
}
class Defaults {
constructor(_descriptors, _appliers){
this.animation = undefined;
this.backgroundColor = 'rgba(0,0,0,0.1)';
this.borderColor = 'rgba(0,0,0,0.1)';
this.color = '#666';
this.datasets = {};
this.devicePixelRatio = (context)=>context.chart.platform.getDevicePixelRatio();
this.elements = {};
this.events = [
'mousemove',
'mouseout',
'click',
'touchstart',
'touchmove'
];
this.font = {
family: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
size: 12,
style: 'normal',
lineHeight: 1.2,
weight: null
};
this.hover = {};
this.hoverBackgroundColor = (ctx, options)=>getHoverColor(options.backgroundColor);
this.hoverBorderColor = (ctx, options)=>getHoverColor(options.borderColor);
this.hoverColor = (ctx, options)=>getHoverColor(options.color);
this.indexAxis = 'x';
this.interaction = {
mode: 'nearest',
intersect: true,
includeInvisible: false
};
this.maintainAspectRatio = true;
this.onHover = null;
this.onClick = null;
this.parsing = true;
this.plugins = {};
this.responsive = true;
this.scale = undefined;
this.scales = {};
this.showLine = true;
this.drawActiveElementsOnTop = true;
this.describe(_descriptors);
this.apply(_appliers);
}
set(scope, values) {
return set(this, scope, values);
}
get(scope) {
return getScope$1(this, scope);
}
describe(scope, values) {
return set(descriptors, scope, values);
}
override(scope, values) {
return set(overrides, scope, values);
}
route(scope, name, targetScope, targetName) {
const scopeObject = getScope$1(this, scope);
const targetScopeObject = getScope$1(this, targetScope);
const privateName = '_' + name;
Object.defineProperties(scopeObject, {
[privateName]: {
value: scopeObject[name],
writable: true
},
[name]: {
enumerable: true,
get () {
const local = this[privateName];
const target = targetScopeObject[targetName];
if (isObject(local)) {
return Object.assign({}, target, local);
}
return valueOrDefault(local, target);
},
set (value) {
this[privateName] = value;
}
}
});
}
apply(appliers) {
appliers.forEach((apply)=>apply(this));
}
}
var defaults = /* #__PURE__ */ new Defaults({
_scriptable: (name)=>!name.startsWith('on'),
_indexable: (name)=>name !== 'events',
hover: {
_fallback: 'interaction'
},
interaction: {
_scriptable: false,
_indexable: false
}
}, [
applyAnimationsDefaults,
applyLayoutsDefaults,
applyScaleDefaults
]);
/**
* Converts the given font object into a CSS font string.
* @param font - A font object.
* @return The CSS font string. See https://developer.mozilla.org/en-US/docs/Web/CSS/font
* @private
*/ function toFontString(font) {
if (!font || isNullOrUndef(font.size) || isNullOrUndef(font.family)) {
return null;
}
return (font.style ? font.style + ' ' : '') + (font.weight ? font.weight + ' ' : '') + font.size + 'px ' + font.family;
}
/**
* @private
*/ function _measureText(ctx, data, gc, longest, string) {
let textWidth = data[string];
if (!textWidth) {
textWidth = data[string] = ctx.measureText(string).width;
gc.push(string);
}
if (textWidth > longest) {
longest = textWidth;
}
return longest;
}
/**
* @private
*/ // eslint-disable-next-line complexity
function _longestText(ctx, font, arrayOfThings, cache) {
cache = cache || {};
let data = cache.data = cache.data || {};
let gc = cache.garbageCollect = cache.garbageCollect || [];
if (cache.font !== font) {
data = cache.data = {};
gc = cache.garbageCollect = [];
cache.font = font;
}
ctx.save();
ctx.font = font;
let longest = 0;
const ilen = arrayOfThings.length;
let i, j, jlen, thing, nestedThing;
for(i = 0; i < ilen; i++){
thing = arrayOfThings[i];
// Undefined strings and arrays should not be measured
if (thing !== undefined && thing !== null && !isArray(thing)) {
longest = _measureText(ctx, data, gc, longest, thing);
} else if (isArray(thing)) {
// if it is an array lets measure each element
// to do maybe simplify this function a bit so we can do this more recursively?
for(j = 0, jlen = thing.length; j < jlen; j++){
nestedThing = thing[j];
// Undefined strings and arrays should not be measured
if (nestedThing !== undefined && nestedThing !== null && !isArray(nestedThing)) {
longest = _measureText(ctx, data, gc, longest, nestedThing);
}
}
}
}
ctx.restore();
const gcLen = gc.length / 2;
if (gcLen > arrayOfThings.length) {
for(i = 0; i < gcLen; i++){
delete data[gc[i]];
}
gc.splice(0, gcLen);
}
return longest;
}
/**
* Returns the aligned pixel value to avoid anti-aliasing blur
* @param chart - The chart instance.
* @param pixel - A pixel value.
* @param width - The width of the element.
* @returns The aligned pixel value.
* @private
*/ function _alignPixel(chart, pixel, width) {
const devicePixelRatio = chart.currentDevicePixelRatio;
const halfWidth = width !== 0 ? Math.max(width / 2, 0.5) : 0;
return Math.round((pixel - halfWidth) * devicePixelRatio) / devicePixelRatio + halfWidth;
}
/**
* Clears the entire canvas.
*/ function clearCanvas(canvas, ctx) {
if (!ctx && !canvas) {
return;
}
ctx = ctx || canvas.getContext('2d');
ctx.save();
// canvas.width and canvas.height do not consider the canvas transform,
// while clearRect does
ctx.resetTransform();
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.restore();
}
function drawPoint(ctx, options, x, y) {
// eslint-disable-next-line @typescript-eslint/no-use-before-define
drawPointLegend(ctx, options, x, y, null);
}
// eslint-disable-next-line complexity
function drawPointLegend(ctx, options, x, y, w) {
let type, xOffset, yOffset, size, cornerRadius, width, xOffsetW, yOffsetW;
const style = options.pointStyle;
const rotation = options.rotation;
const radius = options.radius;
let rad = (rotation || 0) * RAD_PER_DEG;
if (style && typeof style === 'object') {
type = style.toString();
if (type === '[object HTMLImageElement]' || type === '[object HTMLCanvasElement]') {
ctx.save();
ctx.translate(x, y);
ctx.rotate(rad);
ctx.drawImage(style, -style.width / 2, -style.height / 2, style.width, style.height);
ctx.restore();
return;
}
}
if (isNaN(radius) || radius <= 0) {
return;
}
ctx.beginPath();
switch(style){
// Default includes circle
default:
if (w) {
ctx.ellipse(x, y, w / 2, radius, 0, 0, TAU);
} else {
ctx.arc(x, y, radius, 0, TAU);
}
ctx.closePath();
break;
case 'triangle':
width = w ? w / 2 : radius;
ctx.moveTo(x + Math.sin(rad) * width, y - Math.cos(rad) * radius);
rad += TWO_THIRDS_PI;
ctx.lineTo(x + Math.sin(rad) * width, y - Math.cos(rad) * radius);
rad += TWO_THIRDS_PI;
ctx.lineTo(x + Math.sin(rad) * width, y - Math.cos(rad) * radius);
ctx.closePath();
break;
case 'rectRounded':
// NOTE: the rounded rect implementation changed to use `arc` instead of
// `quadraticCurveTo` since it generates better results when rect is
// almost a circle. 0.516 (instead of 0.5) produces results with visually
// closer proportion to the previous impl and it is inscribed in the
// circle with `radius`. For more details, see the following PRs:
// https://github.com/chartjs/Chart.js/issues/5597
// https://github.com/chartjs/Chart.js/issues/5858
cornerRadius = radius * 0.516;
size = radius - cornerRadius;
xOffset = Math.cos(rad + QUARTER_PI) * size;
xOffsetW = Math.cos(rad + QUARTER_PI) * (w ? w / 2 - cornerRadius : size);
yOffset = Math.sin(rad + QUARTER_PI) * size;
yOffsetW = Math.sin(rad + QUARTER_PI) * (w ? w / 2 - cornerRadius : size);
ctx.arc(x - xOffsetW, y - yOffset, cornerRadius, rad - PI, rad - HALF_PI);
ctx.arc(x + yOffsetW, y - xOffset, cornerRadius, rad - HALF_PI, rad);
ctx.arc(x + xOffsetW, y + yOffset, cornerRadius, rad, rad + HALF_PI);
ctx.arc(x - yOffsetW, y + xOffset, cornerRadius, rad + HALF_PI, rad + PI);
ctx.closePath();
break;
case 'rect':
if (!rotation) {
size = Math.SQRT1_2 * radius;
width = w ? w / 2 : size;
ctx.rect(x - width, y - size, 2 * width, 2 * size);
break;
}
rad += QUARTER_PI;
/* falls through */ case 'rectRot':
xOffsetW = Math.cos(rad) * (w ? w / 2 : radius);
xOffset = Math.cos(rad) * radius;
yOffset = Math.sin(rad) * radius;
yOffsetW = Math.sin(rad) * (w ? w / 2 : radius);
ctx.moveTo(x - xOffsetW, y - yOffset);
ctx.lineTo(x + yOffsetW, y - xOffset);
ctx.lineTo(x + xOffsetW, y + yOffset);
ctx.lineTo(x - yOffsetW, y + xOffset);
ctx.closePath();
break;
case 'crossRot':
rad += QUARTER_PI;
/* falls through */ case 'cross':
xOffsetW = Math.cos(rad) * (w ? w / 2 : radius);
xOffset = Math.cos(rad) * radius;
yOffset = Math.sin(rad) * radius;
yOffsetW = Math.sin(rad) * (w ? w / 2 : radius);
ctx.moveTo(x - xOffsetW, y - yOffset);
ctx.lineTo(x + xOffsetW, y + yOffset);
ctx.moveTo(x + yOffsetW, y - xOffset);
ctx.lineTo(x - yOffsetW, y + xOffset);
break;
case 'star':
xOffsetW = Math.cos(rad) * (w ? w / 2 : radius);
xOffset = Math.cos(rad) * radius;
yOffset = Math.sin(rad) * radius;
yOffsetW = Math.sin(rad) * (w ? w / 2 : radius);
ctx.moveTo(x - xOffsetW, y - yOffset);
ctx.lineTo(x + xOffsetW, y + yOffset);
ctx.moveTo(x + yOffsetW, y - xOffset);
ctx.lineTo(x - yOffsetW, y + xOffset);
rad += QUARTER_PI;
xOffsetW = Math.cos(rad) * (w ? w / 2 : radius);
xOffset = Math.cos(rad) * radius;
yOffset = Math.sin(rad) * radius;
yOffsetW = Math.sin(rad) * (w ? w / 2 : radius);
ctx.moveTo(x - xOffsetW, y - yOffset);
ctx.lineTo(x + xOffsetW, y + yOffset);
ctx.moveTo(x + yOffsetW, y - xOffset);
ctx.lineTo(x - yOffsetW, y + xOffset);
break;
case 'line':
xOffset = w ? w / 2 : Math.cos(rad) * radius;
yOffset = Math.sin(rad) * radius;
ctx.moveTo(x - xOffset, y - yOffset);
ctx.lineTo(x + xOffset, y + yOffset);
break;
case 'dash':
ctx.moveTo(x, y);
ctx.lineTo(x + Math.cos(rad) * (w ? w / 2 : radius), y + Math.sin(rad) * radius);
break;
case false:
ctx.closePath();
break;
}
ctx.fill();
if (options.borderWidth > 0) {
ctx.stroke();
}
}
/**
* Returns true if the point is inside the rectangle
* @param point - The point to test
* @param area - The rectangle
* @param margin - allowed margin
* @private
*/ function _isPointInArea(point, area, margin) {
margin = margin || 0.5; // margin - default is to match rounded decimals
return !area || point && point.x > area.left - margin && point.x < area.right + margin && point.y > area.top - margin && point.y < area.bottom + margin;
}
function clipArea(ctx, area) {
ctx.save();
ctx.beginPath();
ctx.rect(area.left, area.top, area.right - area.left, area.bottom - area.top);
ctx.clip();
}
function unclipArea(ctx) {
ctx.restore();
}
/**
* @private
*/ function _steppedLineTo(ctx, previous, target, flip, mode) {
if (!previous) {
return ctx.lineTo(target.x, target.y);
}
if (mode === 'middle') {
const midpoint = (previous.x + target.x) / 2.0;
ctx.lineTo(midpoint, previous.y);
ctx.lineTo(midpoint, target.y);
} else if (mode === 'after' !== !!flip) {
ctx.lineTo(previous.x, target.y);
} else {
ctx.lineTo(target.x, previous.y);
}
ctx.lineTo(target.x, target.y);
}
/**
* @private
*/ function _bezierCurveTo(ctx, previous, target, flip) {
if (!previous) {
return ctx.lineTo(target.x, target.y);
}
ctx.bezierCurveTo(flip ? previous.cp1x : previous.cp2x, flip ? previous.cp1y : previous.cp2y, flip ? target.cp2x : target.cp1x, flip ? target.cp2y : target.cp1y, target.x, target.y);
}
function setRenderOpts(ctx, opts) {
if (opts.translation) {
ctx.translate(opts.translation[0], opts.translation[1]);
}
if (!isNullOrUndef(opts.rotation)) {
ctx.rotate(opts.rotation);
}
if (opts.color) {
ctx.fillStyle = opts.color;
}
if (opts.textAlign) {
ctx.textAlign = opts.textAlign;
}
if (opts.textBaseline) {
ctx.textBaseline = opts.textBaseline;
}
}
function decorateText(ctx, x, y, line, opts) {
if (opts.strikethrough || opts.underline) {
/**
* Now that IE11 support has been dropped, we can use more
* of the TextMetrics object. The actual bounding boxes
* are unflagged in Chrome, Firefox, Edge, and Safari so they
* can be safely used.
* See https://developer.mozilla.org/en-US/docs/Web/API/TextMetrics#Browser_compatibility
*/ const metrics = ctx.measureText(line);
const left = x - metrics.actualBoundingBoxLeft;
const right = x + metrics.actualBoundingBoxRight;
const top = y - metrics.actualBoundingBoxAscent;
const bottom = y + metrics.actualBoundingBoxDescent;
const yDecoration = opts.strikethrough ? (top + bottom) / 2 : bottom;
ctx.strokeStyle = ctx.fillStyle;
ctx.beginPath();
ctx.lineWidth = opts.decorationWidth || 2;
ctx.moveTo(left, yDecoration);
ctx.lineTo(right, yDecoration);
ctx.stroke();
}
}
function drawBackdrop(ctx, opts) {
const oldColor = ctx.fillStyle;
ctx.fillStyle = opts.color;
ctx.fillRect(opts.left, opts.top, opts.width, opts.height);
ctx.fillStyle = oldColor;
}
/**
* Render text onto the canvas
*/ function renderText(ctx, text, x, y, font, opts = {}) {
const lines = isArray(text) ? text : [
text
];
const stroke = opts.strokeWidth > 0 && opts.strokeColor !== '';
let i, line;
ctx.save();
ctx.font = font.string;
setRenderOpts(ctx, opts);
for(i = 0; i < lines.length; ++i){
line = lines[i];
if (opts.backdrop) {
drawBackdrop(ctx, opts.backdrop);
}
if (stroke) {
if (opts.strokeColor) {
ctx.strokeStyle = opts.strokeColor;
}
if (!isNullOrUndef(opts.strokeWidth)) {
ctx.lineWidth = opts.strokeWidth;
}
ctx.strokeText(line, x, y, opts.maxWidth);
}
ctx.fillText(line, x, y, opts.maxWidth);
decorateText(ctx, x, y, line, opts);
y += Number(font.lineHeight);
}
ctx.restore();
}
/**
* Add a path of a rectangle with rounded corners to the current sub-path
* @param ctx - Context
* @param rect - Bounding rect
*/ function addRoundedRectPath(ctx, rect) {
const { x , y , w , h , radius } = rect;
// top left arc
ctx.arc(x + radius.topLeft, y + radius.topLeft, radius.topLeft, 1.5 * PI, PI, true);
// line from top left to bottom left
ctx.lineTo(x, y + h - radius.bottomLeft);
// bottom left arc
ctx.arc(x + radius.bottomLeft, y + h - radius.bottomLeft, radius.bottomLeft, PI, HALF_PI, true);
// line from bottom left to bottom right
ctx.lineTo(x + w - radius.bottomRight, y + h);
// bottom right arc
ctx.arc(x + w - radius.bottomRight, y + h - radius.bottomRight, radius.bottomRight, HALF_PI, 0, true);
// line from bottom right to top right
ctx.lineTo(x + w, y + radius.topRight);
// top right arc
ctx.arc(x + w - radius.topRight, y + radius.topRight, radius.topRight, 0, -HALF_PI, true);
// line from top right to top left
ctx.lineTo(x + radius.topLeft, y);
}
const LINE_HEIGHT = /^(normal|(\d+(?:\.\d+)?)(px|em|%)?)$/;
const FONT_STYLE = /^(normal|italic|initial|inherit|unset|(oblique( -?[0-9]?[0-9]deg)?))$/;
/**
* @alias Chart.helpers.options
* @namespace
*/ /**
* Converts the given line height `value` in pixels for a specific font `size`.
* @param value - The lineHeight to parse (eg. 1.6, '14px', '75%', '1.6em').
* @param size - The font size (in pixels) used to resolve relative `value`.
* @returns The effective line height in pixels (size * 1.2 if value is invalid).
* @see https://developer.mozilla.org/en-US/docs/Web/CSS/line-height
* @since 2.7.0
*/ function toLineHeight(value, size) {
const matches = ('' + value).match(LINE_HEIGHT);
if (!matches || matches[1] === 'normal') {
return size * 1.2;
}
value = +matches[2];
switch(matches[3]){
case 'px':
return value;
case '%':
value /= 100;
break;
}
return size * value;
}
const numberOrZero = (v)=>+v || 0;
function _readValueToProps(value, props) {
const ret = {};
const objProps = isObject(props);
const keys = objProps ? Object.keys(props) : props;
const read = isObject(value) ? objProps ? (prop)=>valueOrDefault(value[prop], value[props[prop]]) : (prop)=>value[prop] : ()=>value;
for (const prop of keys){
ret[prop] = numberOrZero(read(prop));
}
return ret;
}
/**
* Converts the given value into a TRBL object.
* @param value - If a number, set the value to all TRBL component,
* else, if an object, use defined properties and sets undefined ones to 0.
* x / y are shorthands for same value for left/right and top/bottom.
* @returns The padding values (top, right, bottom, left)
* @since 3.0.0
*/ function toTRBL(value) {
return _readValueToProps(value, {
top: 'y',
right: 'x',
bottom: 'y',
left: 'x'
});
}
/**
* Converts the given value into a TRBL corners object (similar with css border-radius).
* @param value - If a number, set the value to all TRBL corner components,
* else, if an object, use defined properties and sets undefined ones to 0.
* @returns The TRBL corner values (topLeft, topRight, bottomLeft, bottomRight)
* @since 3.0.0
*/ function toTRBLCorners(value) {
return _readValueToProps(value, [
'topLeft',
'topRight',
'bottomLeft',
'bottomRight'
]);
}
/**
* Converts the given value into a padding object with pre-computed width/height.
* @param value - If a number, set the value to all TRBL component,
* else, if an object, use defined properties and sets undefined ones to 0.
* x / y are shorthands for same value for left/right and top/bottom.
* @returns The padding values (top, right, bottom, left, width, height)
* @since 2.7.0
*/ function toPadding(value) {
const obj = toTRBL(value);
obj.width = obj.left + obj.right;
obj.height = obj.top + obj.bottom;
return obj;
}
/**
* Parses font options and returns the font object.
* @param options - A object that contains font options to be parsed.
* @param fallback - A object that contains fallback font options.
* @return The font object.
* @private
*/ function toFont(options, fallback) {
options = options || {};
fallback = fallback || defaults.font;
let size = valueOrDefault(options.size, fallback.size);
if (typeof size === 'string') {
size = parseInt(size, 10);
}
let style = valueOrDefault(options.style, fallback.style);
if (style && !('' + style).match(FONT_STYLE)) {
console.warn('Invalid font style specified: "' + style + '"');
style = undefined;
}
const font = {
family: valueOrDefault(options.family, fallback.family),
lineHeight: toLineHeight(valueOrDefault(options.lineHeight, fallback.lineHeight), size),
size,
style,
weight: valueOrDefault(options.weight, fallback.weight),
string: ''
};
font.string = toFontString(font);
return font;
}
/**
* Evaluates the given `inputs` sequentially and returns the first defined value.
* @param inputs - An array of values, falling back to the last value.
* @param context - If defined and the current value is a function, the value
* is called with `context` as first argument and the result becomes the new input.
* @param index - If defined and the current value is an array, the value
* at `index` become the new input.
* @param info - object to return information about resolution in
* @param info.cacheable - Will be set to `false` if option is not cacheable.
* @since 2.7.0
*/ function resolve(inputs, context, index, info) {
let cacheable = true;
let i, ilen, value;
for(i = 0, ilen = inputs.length; i < ilen; ++i){
value = inputs[i];
if (value === undefined) {
continue;
}
if (context !== undefined && typeof value === 'function') {
value = value(context);
cacheable = false;
}
if (index !== undefined && isArray(value)) {
value = value[index % value.length];
cacheable = false;
}
if (value !== undefined) {
if (info && !cacheable) {
info.cacheable = false;
}
return value;
}
}
}
/**
* @param minmax
* @param grace
* @param beginAtZero
* @private
*/ function _addGrace(minmax, grace, beginAtZero) {
const { min , max } = minmax;
const change = toDimension(grace, (max - min) / 2);
const keepZero = (value, add)=>beginAtZero && value === 0 ? 0 : value + add;
return {
min: keepZero(min, -Math.abs(change)),
max: keepZero(max, change)
};
}
function createContext(parentContext, context) {
return Object.assign(Object.create(parentContext), context);
}
/**
* Creates a Proxy for resolving raw values for options.
* @param scopes - The option scopes to look for values, in resolution order
* @param prefixes - The prefixes for values, in resolution order.
* @param rootScopes - The root option scopes
* @param fallback - Parent scopes fallback
* @param getTarget - callback for getting the target for changed values
* @returns Proxy
* @private
*/ function _createResolver(scopes, prefixes = [
''
], rootScopes, fallback, getTarget = ()=>scopes[0]) {
const finalRootScopes = rootScopes || scopes;
if (typeof fallback === 'undefined') {
fallback = _resolve('_fallback', scopes);
}
const cache = {
[Symbol.toStringTag]: 'Object',
_cacheable: true,
_scopes: scopes,
_rootScopes: finalRootScopes,
_fallback: fallback,
_getTarget: getTarget,
override: (scope)=>_createResolver([
scope,
...scopes
], prefixes, finalRootScopes, fallback)
};
return new Proxy(cache, {
/**
* A trap for the delete operator.
*/ deleteProperty (target, prop) {
delete target[prop]; // remove from cache
delete target._keys; // remove cached keys
delete scopes[0][prop]; // remove from top level scope
return true;
},
/**
* A trap for getting property values.
*/ get (target, prop) {
return _cached(target, prop, ()=>_resolveWithPrefixes(prop, prefixes, scopes, target));
},
/**
* A trap for Object.getOwnPropertyDescriptor.
* Also used by Object.hasOwnProperty.
*/ getOwnPropertyDescriptor (target, prop) {
return Reflect.getOwnPropertyDescriptor(target._scopes[0], prop);
},
/**
* A trap for Object.getPrototypeOf.
*/ getPrototypeOf () {
return Reflect.getPrototypeOf(scopes[0]);
},
/**
* A trap for the in operator.
*/ has (target, prop) {
return getKeysFromAllScopes(target).includes(prop);
},
/**
* A trap for Object.getOwnPropertyNames and Object.getOwnPropertySymbols.
*/ ownKeys (target) {
return getKeysFromAllScopes(target);
},
/**
* A trap for setting property values.
*/ set (target, prop, value) {
const storage = target._storage || (target._storage = getTarget());
target[prop] = storage[prop] = value; // set to top level scope + cache
delete target._keys; // remove cached keys
return true;
}
});
}
/**
* Returns an Proxy for resolving option values with context.
* @param proxy - The Proxy returned by `_createResolver`
* @param context - Context object for scriptable/indexable options
* @param subProxy - The proxy provided for scriptable options
* @param descriptorDefaults - Defaults for descriptors
* @private
*/ function _attachContext(proxy, context, subProxy, descriptorDefaults) {
const cache = {
_cacheable: false,
_proxy: proxy,
_context: context,
_subProxy: subProxy,
_stack: new Set(),
_descriptors: _descriptors(proxy, descriptorDefaults),
setContext: (ctx)=>_attachContext(proxy, ctx, subProxy, descriptorDefaults),
override: (scope)=>_attachContext(proxy.override(scope), context, subProxy, descriptorDefaults)
};
return new Proxy(cache, {
/**
* A trap for the delete operator.
*/ deleteProperty (target, prop) {
delete target[prop]; // remove from cache
delete proxy[prop]; // remove from proxy
return true;
},
/**
* A trap for getting property values.
*/ get (target, prop, receiver) {
return _cached(target, prop, ()=>_resolveWithContext(target, prop, receiver));
},
/**
* A trap for Object.getOwnPropertyDescriptor.
* Also used by Object.hasOwnProperty.
*/ getOwnPropertyDescriptor (target, prop) {
return target._descriptors.allKeys ? Reflect.has(proxy, prop) ? {
enumerable: true,
configurable: true
} : undefined : Reflect.getOwnPropertyDescriptor(proxy, prop);
},
/**
* A trap for Object.getPrototypeOf.
*/ getPrototypeOf () {
return Reflect.getPrototypeOf(proxy);
},
/**
* A trap for the in operator.
*/ has (target, prop) {
return Reflect.has(proxy, prop);
},
/**
* A trap for Object.getOwnPropertyNames and Object.getOwnPropertySymbols.
*/ ownKeys () {
return Reflect.ownKeys(proxy);
},
/**
* A trap for setting property values.
*/ set (target, prop, value) {
proxy[prop] = value; // set to proxy
delete target[prop]; // remove from cache
return true;
}
});
}
/**
* @private
*/ function _descriptors(proxy, defaults = {
scriptable: true,
indexable: true
}) {
const { _scriptable =defaults.scriptable , _indexable =defaults.indexable , _allKeys =defaults.allKeys } = proxy;
return {
allKeys: _allKeys,
scriptable: _scriptable,
indexable: _indexable,
isScriptable: isFunction(_scriptable) ? _scriptable : ()=>_scriptable,
isIndexable: isFunction(_indexable) ? _indexable : ()=>_indexable
};
}
const readKey = (prefix, name)=>prefix ? prefix + _capitalize(name) : name;
const needsSubResolver = (prop, value)=>isObject(value) && prop !== 'adapters' && (Object.getPrototypeOf(value) === null || value.constructor === Object);
function _cached(target, prop, resolve) {
if (Object.prototype.hasOwnProperty.call(target, prop) || prop === 'constructor') {
return target[prop];
}
const value = resolve();
// cache the resolved value
target[prop] = value;
return value;
}
function _resolveWithContext(target, prop, receiver) {
const { _proxy , _context , _subProxy , _descriptors: descriptors } = target;
let value = _proxy[prop]; // resolve from proxy
// resolve with context
if (isFunction(value) && descriptors.isScriptable(prop)) {
value = _resolveScriptable(prop, value, target, receiver);
}
if (isArray(value) && value.length) {
value = _resolveArray(prop, value, target, descriptors.isIndexable);
}
if (needsSubResolver(prop, value)) {
// if the resolved value is an object, create a sub resolver for it
value = _attachContext(value, _context, _subProxy && _subProxy[prop], descriptors);
}
return value;
}
function _resolveScriptable(prop, getValue, target, receiver) {
const { _proxy , _context , _subProxy , _stack } = target;
if (_stack.has(prop)) {
throw new Error('Recursion detected: ' + Array.from(_stack).join('->') + '->' + prop);
}
_stack.add(prop);
let value = getValue(_context, _subProxy || receiver);
_stack.delete(prop);
if (needsSubResolver(prop, value)) {
// When scriptable option returns an object, create a resolver on that.
value = createSubResolver(_proxy._scopes, _proxy, prop, value);
}
return value;
}
function _resolveArray(prop, value, target, isIndexable) {
const { _proxy , _context , _subProxy , _descriptors: descriptors } = target;
if (typeof _context.index !== 'undefined' && isIndexable(prop)) {
return value[_context.index % value.length];
} else if (isObject(value[0])) {
// Array of objects, return array or resolvers
const arr = value;
const scopes = _proxy._scopes.filter((s)=>s !== arr);
value = [];
for (const item of arr){
const resolver = createSubResolver(scopes, _proxy, prop, item);
value.push(_attachContext(resolver, _context, _subProxy && _subProxy[prop], descriptors));
}
}
return value;
}
function resolveFallback(fallback, prop, value) {
return isFunction(fallback) ? fallback(prop, value) : fallback;
}
const getScope = (key, parent)=>key === true ? parent : typeof key === 'string' ? resolveObjectKey(parent, key) : undefined;
function addScopes(set, parentScopes, key, parentFallback, value) {
for (const parent of parentScopes){
const scope = getScope(key, parent);
if (scope) {
set.add(scope);
const fallback = resolveFallback(scope._fallback, key, value);
if (typeof fallback !== 'undefined' && fallback !== key && fallback !== parentFallback) {
// When we reach the descriptor that defines a new _fallback, return that.
// The fallback will resume to that new scope.
return fallback;
}
} else if (scope === false && typeof parentFallback !== 'undefined' && key !== parentFallback) {
// Fallback to `false` results to `false`, when falling back to different key.
// For example `interaction` from `hover` or `plugins.tooltip` and `animation` from `animations`
return null;
}
}
return false;
}
function createSubResolver(parentScopes, resolver, prop, value) {
const rootScopes = resolver._rootScopes;
const fallback = resolveFallback(resolver._fallback, prop, value);
const allScopes = [
...parentScopes,
...rootScopes
];
const set = new Set();
set.add(value);
let key = addScopesFromKey(set, allScopes, prop, fallback || prop, value);
if (key === null) {
return false;
}
if (typeof fallback !== 'undefined' && fallback !== prop) {
key = addScopesFromKey(set, allScopes, fallback, key, value);
if (key === null) {
return false;
}
}
return _createResolver(Array.from(set), [
''
], rootScopes, fallback, ()=>subGetTarget(resolver, prop, value));
}
function addScopesFromKey(set, allScopes, key, fallback, item) {
while(key){
key = addScopes(set, allScopes, key, fallback, item);
}
return key;
}
function subGetTarget(resolver, prop, value) {
const parent = resolver._getTarget();
if (!(prop in parent)) {
parent[prop] = {};
}
const target = parent[prop];
if (isArray(target) && isObject(value)) {
// For array of objects, the object is used to store updated values
return value;
}
return target || {};
}
function _resolveWithPrefixes(prop, prefixes, scopes, proxy) {
let value;
for (const prefix of prefixes){
value = _resolve(readKey(prefix, prop), scopes);
if (typeof value !== 'undefined') {
return needsSubResolver(prop, value) ? createSubResolver(scopes, proxy, prop, value) : value;
}
}
}
function _resolve(key, scopes) {
for (const scope of scopes){
if (!scope) {
continue;
}
const value = scope[key];
if (typeof value !== 'undefined') {
return value;
}
}
}
function getKeysFromAllScopes(target) {
let keys = target._keys;
if (!keys) {
keys = target._keys = resolveKeysFromAllScopes(target._scopes);
}
return keys;
}
function resolveKeysFromAllScopes(scopes) {
const set = new Set();
for (const scope of scopes){
for (const key of Object.keys(scope).filter((k)=>!k.startsWith('_'))){
set.add(key);
}
}
return Array.from(set);
}
function _parseObjectDataRadialScale(meta, data, start, count) {
const { iScale } = meta;
const { key ='r' } = 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] = {
r: iScale.parse(resolveObjectKey(item, key), index)
};
}
return parsed;
}
const EPSILON = Number.EPSILON || 1e-14;
const getPoint = (points, i)=>i < points.length && !points[i].skip && points[i];
const getValueAxis = (indexAxis)=>indexAxis === 'x' ? 'y' : 'x';
function splineCurve(firstPoint, middlePoint, afterPoint, t) {
// Props to Rob Spencer at scaled innovation for his post on splining between points
// http://scaledinnovation.com/analytics/splines/aboutSplines.html
// This function must also respect "skipped" points
const previous = firstPoint.skip ? middlePoint : firstPoint;
const current = middlePoint;
const next = afterPoint.skip ? middlePoint : afterPoint;
const d01 = distanceBetweenPoints(current, previous);
const d12 = distanceBetweenPoints(next, current);
let s01 = d01 / (d01 + d12);
let s12 = d12 / (d01 + d12);
// If all points are the same, s01 & s02 will be inf
s01 = isNaN(s01) ? 0 : s01;
s12 = isNaN(s12) ? 0 : s12;
const fa = t * s01; // scaling factor for triangle Ta
const fb = t * s12;
return {
previous: {
x: current.x - fa * (next.x - previous.x),
y: current.y - fa * (next.y - previous.y)
},
next: {
x: current.x + fb * (next.x - previous.x),
y: current.y + fb * (next.y - previous.y)
}
};
}
/**
* Adjust tangents to ensure monotonic properties
*/ function monotoneAdjust(points, deltaK, mK) {
const pointsLen = points.length;
let alphaK, betaK, tauK, squaredMagnitude, pointCurrent;
let pointAfter = getPoint(points, 0);
for(let i = 0; i < pointsLen - 1; ++i){
pointCurrent = pointAfter;
pointAfter = getPoint(points, i + 1);
if (!pointCurrent || !pointAfter) {
continue;
}
if (almostEquals(deltaK[i], 0, EPSILON)) {
mK[i] = mK[i + 1] = 0;
continue;
}
alphaK = mK[i] / deltaK[i];
betaK = mK[i + 1] / deltaK[i];
squaredMagnitude = Math.pow(alphaK, 2) + Math.pow(betaK, 2);
if (squaredMagnitude <= 9) {
continue;
}
tauK = 3 / Math.sqrt(squaredMagnitude);
mK[i] = alphaK * tauK * deltaK[i];
mK[i + 1] = betaK * tauK * deltaK[i];
}
}
function monotoneCompute(points, mK, indexAxis = 'x') {
const valueAxis = getValueAxis(indexAxis);
const pointsLen = points.length;
let delta, pointBefore, pointCurrent;
let pointAfter = getPoint(points, 0);
for(let i = 0; i < pointsLen; ++i){
pointBefore = pointCurrent;
pointCurrent = pointAfter;
pointAfter = getPoint(points, i + 1);
if (!pointCurrent) {
continue;
}
const iPixel = pointCurrent[indexAxis];
const vPixel = pointCurrent[valueAxis];
if (pointBefore) {
delta = (iPixel - pointBefore[indexAxis]) / 3;
pointCurrent[`cp1${indexAxis}`] = iPixel - delta;
pointCurrent[`cp1${valueAxis}`] = vPixel - delta * mK[i];
}
if (pointAfter) {
delta = (pointAfter[indexAxis] - iPixel) / 3;
pointCurrent[`cp2${indexAxis}`] = iPixel + delta;
pointCurrent[`cp2${valueAxis}`] = vPixel + delta * mK[i];
}
}
}
/**
* This function calculates Bézier control points in a similar way than |splineCurve|,
* but preserves monotonicity of the provided data and ensures no local extremums are added
* between the dataset discrete points due to the interpolation.
* See : https://en.wikipedia.org/wiki/Monotone_cubic_interpolation
*/ function splineCurveMonotone(points, indexAxis = 'x') {
const valueAxis = getValueAxis(indexAxis);
const pointsLen = points.length;
const deltaK = Array(pointsLen).fill(0);
const mK = Array(pointsLen);
// Calculate slopes (deltaK) and initialize tangents (mK)
let i, pointBefore, pointCurrent;
let pointAfter = getPoint(points, 0);
for(i = 0; i < pointsLen; ++i){
pointBefore = pointCurrent;
pointCurrent = pointAfter;
pointAfter = getPoint(points, i + 1);
if (!pointCurrent) {
continue;
}
if (pointAfter) {
const slopeDelta = pointAfter[indexAxis] - pointCurrent[indexAxis];
// In the case of two points that appear at the same x pixel, slopeDeltaX is 0
deltaK[i] = slopeDelta !== 0 ? (pointAfter[valueAxis] - pointCurrent[valueAxis]) / slopeDelta : 0;
}
mK[i] = !pointBefore ? deltaK[i] : !pointAfter ? deltaK[i - 1] : sign(deltaK[i - 1]) !== sign(deltaK[i]) ? 0 : (deltaK[i - 1] + deltaK[i]) / 2;
}
monotoneAdjust(points, deltaK, mK);
monotoneCompute(points, mK, indexAxis);
}
function capControlPoint(pt, min, max) {
return Math.max(Math.min(pt, max), min);
}
function capBezierPoints(points, area) {
let i, ilen, point, inArea, inAreaPrev;
let inAreaNext = _isPointInArea(points[0], area);
for(i = 0, ilen = points.length; i < ilen; ++i){
inAreaPrev = inArea;
inArea = inAreaNext;
inAreaNext = i < ilen - 1 && _isPointInArea(points[i + 1], area);
if (!inArea) {
continue;
}
point = points[i];
if (inAreaPrev) {
point.cp1x = capControlPoint(point.cp1x, area.left, area.right);
point.cp1y = capControlPoint(point.cp1y, area.top, area.bottom);
}
if (inAreaNext) {
point.cp2x = capControlPoint(point.cp2x, area.left, area.right);
point.cp2y = capControlPoint(point.cp2y, area.top, area.bottom);
}
}
}
/**
* @private
*/ function _updateBezierControlPoints(points, options, area, loop, indexAxis) {
let i, ilen, point, controlPoints;
// Only consider points that are drawn in case the spanGaps option is used
if (options.spanGaps) {
points = points.filter((pt)=>!pt.skip);
}
if (options.cubicInterpolationMode === 'monotone') {
splineCurveMonotone(points, indexAxis);
} else {
let prev = loop ? points[points.length - 1] : points[0];
for(i = 0, ilen = points.length; i < ilen; ++i){
point = points[i];
controlPoints = splineCurve(prev, point, points[Math.min(i + 1, ilen - (loop ? 0 : 1)) % ilen], options.tension);
point.cp1x = controlPoints.previous.x;
point.cp1y = controlPoints.previous.y;
point.cp2x = controlPoints.next.x;
point.cp2y = controlPoints.next.y;
prev = point;
}
}
if (options.capBezierPoints) {
capBezierPoints(points, area);
}
}
/**
* @private
*/ function _isDomSupported() {
return typeof window !== 'undefined' && typeof document !== 'undefined';
}
/**
* @private
*/ function _getParentNode(domNode) {
let parent = domNode.parentNode;
if (parent && parent.toString() === '[object ShadowRoot]') {
parent = parent.host;
}
return parent;
}
/**
* convert max-width/max-height values that may be percentages into a number
* @private
*/ function parseMaxStyle(styleValue, node, parentProperty) {
let valueInPixels;
if (typeof styleValue === 'string') {
valueInPixels = parseInt(styleValue, 10);
if (styleValue.indexOf('%') !== -1) {
// percentage * size in dimension
valueInPixels = valueInPixels / 100 * node.parentNode[parentProperty];
}
} else {
valueInPixels = styleValue;
}
return valueInPixels;
}
const getComputedStyle = (element)=>element.ownerDocument.defaultView.getComputedStyle(element, null);
function getStyle(el, property) {
return getComputedStyle(el).getPropertyValue(property);
}
const positions = [
'top',
'right',
'bottom',
'left'
];
function getPositionedStyle(styles, style, suffix) {
const result = {};
suffix = suffix ? '-' + suffix : '';
for(let i = 0; i < 4; i++){
const pos = positions[i];
result[pos] = parseFloat(styles[style + '-' + pos + suffix]) || 0;
}
result.width = result.left + result.right;
result.height = result.top + result.bottom;
return result;
}
const useOffsetPos = (x, y, target)=>(x > 0 || y > 0) && (!target || !target.shadowRoot);
/**
* @param e
* @param canvas
* @returns Canvas position
*/ function getCanvasPosition(e, canvas) {
const touches = e.touches;
const source = touches && touches.length ? touches[0] : e;
const { offsetX , offsetY } = source;
let box = false;
let x, y;
if (useOffsetPos(offsetX, offsetY, e.target)) {
x = offsetX;
y = offsetY;
} else {
const rect = canvas.getBoundingClientRect();
x = source.clientX - rect.left;
y = source.clientY - rect.top;
box = true;
}
return {
x,
y,
box
};
}
/**
* Gets an event's x, y coordinates, relative to the chart area
* @param event
* @param chart
* @returns x and y coordinates of the event
*/ function getRelativePosition(event, chart) {
if ('native' in event) {
return event;
}
const { canvas , currentDevicePixelRatio } = chart;
const style = getComputedStyle(canvas);
const borderBox = style.boxSizing === 'border-box';
const paddings = getPositionedStyle(style, 'padding');
const borders = getPositionedStyle(style, 'border', 'width');
const { x , y , box } = getCanvasPosition(event, canvas);
const xOffset = paddings.left + (box && borders.left);
const yOffset = paddings.top + (box && borders.top);
let { width , height } = chart;
if (borderBox) {
width -= paddings.width + borders.width;
height -= paddings.height + borders.height;
}
return {
x: Math.round((x - xOffset) / width * canvas.width / currentDevicePixelRatio),
y: Math.round((y - yOffset) / height * canvas.height / currentDevicePixelRatio)
};
}
function getContainerSize(canvas, width, height) {
let maxWidth, maxHeight;
if (width === undefined || height === undefined) {
const container = canvas && _getParentNode(canvas);
if (!container) {
width = canvas.clientWidth;
height = canvas.clientHeight;
} else {
const rect = container.getBoundingClientRect(); // this is the border box of the container
const containerStyle = getComputedStyle(container);
const containerBorder = getPositionedStyle(containerStyle, 'border', 'width');
const containerPadding = getPositionedStyle(containerStyle, 'padding');
width = rect.width - containerPadding.width - containerBorder.width;
height = rect.height - containerPadding.height - containerBorder.height;
maxWidth = parseMaxStyle(containerStyle.maxWidth, container, 'clientWidth');
maxHeight = parseMaxStyle(containerStyle.maxHeight, container, 'clientHeight');
}
}
return {
width,
height,
maxWidth: maxWidth || INFINITY,
maxHeight: maxHeight || INFINITY
};
}
const round1 = (v)=>Math.round(v * 10) / 10;
// eslint-disable-next-line complexity
function getMaximumSize(canvas, bbWidth, bbHeight, aspectRatio) {
const style = getComputedStyle(canvas);
const margins = getPositionedStyle(style, 'margin');
const maxWidth = parseMaxStyle(style.maxWidth, canvas, 'clientWidth') || INFINITY;
const maxHeight = parseMaxStyle(style.maxHeight, canvas, 'clientHeight') || INFINITY;
const containerSize = getContainerSize(canvas, bbWidth, bbHeight);
let { width , height } = containerSize;
if (style.boxSizing === 'content-box') {
const borders = getPositionedStyle(style, 'border', 'width');
const paddings = getPositionedStyle(style, 'padding');
width -= paddings.width + borders.width;
height -= paddings.height + borders.height;
}
width = Math.max(0, width - margins.width);
height = Math.max(0, aspectRatio ? width / aspectRatio : height - margins.height);
width = round1(Math.min(width, maxWidth, containerSize.maxWidth));
height = round1(Math.min(height, maxHeight, containerSize.maxHeight));
if (width && !height) {
// https://github.com/chartjs/Chart.js/issues/4659
// If the canvas has width, but no height, default to aspectRatio of 2 (canvas default)
height = round1(width / 2);
}
const maintainHeight = bbWidth !== undefined || bbHeight !== undefined;
if (maintainHeight && aspectRatio && containerSize.height && height > containerSize.height) {
height = containerSize.height;
width = round1(Math.floor(height * aspectRatio));
}
return {
width,
height
};
}
/**
* @param chart
* @param forceRatio
* @param forceStyle
* @returns True if the canvas context size or transformation has changed.
*/ function retinaScale(chart, forceRatio, forceStyle) {
const pixelRatio = forceRatio || 1;
const deviceHeight = round1(chart.height * pixelRatio);
const deviceWidth = round1(chart.width * pixelRatio);
chart.height = round1(chart.height);
chart.width = round1(chart.width);
const canvas = chart.canvas;
// If no style has been set on the canvas, the render size is used as display size,
// making the chart visually bigger, so let's enforce it to the "correct" values.
// See https://github.com/chartjs/Chart.js/issues/3575
if (canvas.style && (forceStyle || !canvas.style.height && !canvas.style.width)) {
canvas.style.height = `${chart.height}px`;
canvas.style.width = `${chart.width}px`;
}
if (chart.currentDevicePixelRatio !== pixelRatio || canvas.height !== deviceHeight || canvas.width !== deviceWidth) {
chart.currentDevicePixelRatio = pixelRatio;
canvas.height = deviceHeight;
canvas.width = deviceWidth;
chart.ctx.setTransform(pixelRatio, 0, 0, pixelRatio, 0, 0);
return true;
}
return false;
}
/**
* Detects support for options object argument in addEventListener.
* https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Safely_detecting_option_support
* @private
*/ const supportsEventListenerOptions = function() {
let passiveSupported = false;
try {
const options = {
get passive () {
passiveSupported = true;
return false;
}
};
if (_isDomSupported()) {
window.addEventListener('test', null, options);
window.removeEventListener('test', null, options);
}
} catch (e) {
// continue regardless of error
}
return passiveSupported;
}();
/**
* The "used" size is the final value of a dimension property after all calculations have
* been performed. This method uses the computed style of `element` but returns undefined
* if the computed style is not expressed in pixels. That can happen in some cases where
* `element` has a size relative to its parent and this last one is not yet displayed,
* for example because of `display: none` on a parent node.
* @see https://developer.mozilla.org/en-US/docs/Web/CSS/used_value
* @returns Size in pixels or undefined if unknown.
*/ function readUsedSize(element, property) {
const value = getStyle(element, property);
const matches = value && value.match(/^(\d+)(\.\d+)?px$/);
return matches ? +matches[1] : undefined;
}
/**
* @private
*/ function _pointInLine(p1, p2, t, mode) {
return {
x: p1.x + t * (p2.x - p1.x),
y: p1.y + t * (p2.y - p1.y)
};
}
/**
* @private
*/ function _steppedInterpolation(p1, p2, t, mode) {
return {
x: p1.x + t * (p2.x - p1.x),
y: mode === 'middle' ? t < 0.5 ? p1.y : p2.y : mode === 'after' ? t < 1 ? p1.y : p2.y : t > 0 ? p2.y : p1.y
};
}
/**
* @private
*/ function _bezierInterpolation(p1, p2, t, mode) {
const cp1 = {
x: p1.cp2x,
y: p1.cp2y
};
const cp2 = {
x: p2.cp1x,
y: p2.cp1y
};
const a = _pointInLine(p1, cp1, t);
const b = _pointInLine(cp1, cp2, t);
const c = _pointInLine(cp2, p2, t);
const d = _pointInLine(a, b, t);
const e = _pointInLine(b, c, t);
return _pointInLine(d, e, t);
}
const getRightToLeftAdapter = function(rectX, width) {
return {
x (x) {
return rectX + rectX + width - x;
},
setWidth (w) {
width = w;
},
textAlign (align) {
if (align === 'center') {
return align;
}
return align === 'right' ? 'left' : 'right';
},
xPlus (x, value) {
return x - value;
},
leftForLtr (x, itemWidth) {
return x - itemWidth;
}
};
};
const getLeftToRightAdapter = function() {
return {
x (x) {
return x;
},
setWidth (w) {},
textAlign (align) {
return align;
},
xPlus (x, value) {
return x + value;
},
leftForLtr (x, _itemWidth) {
return x;
}
};
};
function getRtlAdapter(rtl, rectX, width) {
return rtl ? getRightToLeftAdapter(rectX, width) : getLeftToRightAdapter();
}
function overrideTextDirection(ctx, direction) {
let style, original;
if (direction === 'ltr' || direction === 'rtl') {
style = ctx.canvas.style;
original = [
style.getPropertyValue('direction'),
style.getPropertyPriority('direction')
];
style.setProperty('direction', direction, 'important');
ctx.prevTextDirection = original;
}
}
function restoreTextDirection(ctx, original) {
if (original !== undefined) {
delete ctx.prevTextDirection;
ctx.canvas.style.setProperty('direction', original[0], original[1]);
}
}
function propertyFn(property) {
if (property === 'angle') {
return {
between: _angleBetween,
compare: _angleDiff,
normalize: _normalizeAngle
};
}
return {
between: _isBetween,
compare: (a, b)=>a - b,
normalize: (x)=>x
};
}
function normalizeSegment({ start , end , count , loop , style }) {
return {
start: start % count,
end: end % count,
loop: loop && (end - start + 1) % count === 0,
style
};
}
function getSegment(segment, points, bounds) {
const { property , start: startBound , end: endBound } = bounds;
const { between , normalize } = propertyFn(property);
const count = points.length;
let { start , end , loop } = segment;
let i, ilen;
if (loop) {
start += count;
end += count;
for(i = 0, ilen = count; i < ilen; ++i){
if (!between(normalize(points[start % count][property]), startBound, endBound)) {
break;
}
start--;
end--;
}
start %= count;
end %= count;
}
if (end < start) {
end += count;
}
return {
start,
end,
loop,
style: segment.style
};
}
function _boundSegment(segment, points, bounds) {
if (!bounds) {
return [
segment
];
}
const { property , start: startBound , end: endBound } = bounds;
const count = points.length;
const { compare , between , normalize } = propertyFn(property);
const { start , end , loop , style } = getSegment(segment, points, bounds);
const result = [];
let inside = false;
let subStart = null;
let value, point, prevValue;
const startIsBefore = ()=>between(startBound, prevValue, value) && compare(startBound, prevValue) !== 0;
const endIsBefore = ()=>compare(endBound, value) === 0 || between(endBound, prevValue, value);
const shouldStart = ()=>inside || startIsBefore();
const shouldStop = ()=>!inside || endIsBefore();
for(let i = start, prev = start; i <= end; ++i){
point = points[i % count];
if (point.skip) {
continue;
}
value = normalize(point[property]);
if (value === prevValue) {
continue;
}
inside = between(value, startBound, endBound);
if (subStart === null && shouldStart()) {
subStart = compare(value, startBound) === 0 ? i : prev;
}
if (subStart !== null && shouldStop()) {
result.push(normalizeSegment({
start: subStart,
end: i,
loop,
count,
style
}));
subStart = null;
}
prev = i;
prevValue = value;
}
if (subStart !== null) {
result.push(normalizeSegment({
start: subStart,
end,
loop,
count,
style
}));
}
return result;
}
function _boundSegments(line, bounds) {
const result = [];
const segments = line.segments;
for(let i = 0; i < segments.length; i++){
const sub = _boundSegment(segments[i], line.points, bounds);
if (sub.length) {
result.push(...sub);
}
}
return result;
}
function findStartAndEnd(points, count, loop, spanGaps) {
let start = 0;
let end = count - 1;
if (loop && !spanGaps) {
while(start < count && !points[start].skip){
start++;
}
}
while(start < count && points[start].skip){
start++;
}
start %= count;
if (loop) {
end += start;
}
while(end > start && points[end % count].skip){
end--;
}
end %= count;
return {
start,
end
};
}
function solidSegments(points, start, max, loop) {
const count = points.length;
const result = [];
let last = start;
let prev = points[start];
let end;
for(end = start + 1; end <= max; ++end){
const cur = points[end % count];
if (cur.skip || cur.stop) {
if (!prev.skip) {
loop = false;
result.push({
start: start % count,
end: (end - 1) % count,
loop
});
start = last = cur.stop ? end : null;
}
} else {
last = end;
if (prev.skip) {
start = end;
}
}
prev = cur;
}
if (last !== null) {
result.push({
start: start % count,
end: last % count,
loop
});
}
return result;
}
function _computeSegments(line, segmentOptions) {
const points = line.points;
const spanGaps = line.options.spanGaps;
const count = points.length;
if (!count) {
return [];
}
const loop = !!line._loop;
const { start , end } = findStartAndEnd(points, count, loop, spanGaps);
if (spanGaps === true) {
return splitByStyles(line, [
{
start,
end,
loop
}
], points, segmentOptions);
}
const max = end < start ? end + count : end;
const completeLoop = !!line._fullLoop && start === 0 && end === count - 1;
return splitByStyles(line, solidSegments(points, start, max, completeLoop), points, segmentOptions);
}
function splitByStyles(line, segments, points, segmentOptions) {
if (!segmentOptions || !segmentOptions.setContext || !points) {
return segments;
}
return doSplitByStyles(line, segments, points, segmentOptions);
}
function doSplitByStyles(line, segments, points, segmentOptions) {
const chartContext = line._chart.getContext();
const baseStyle = readStyle(line.options);
const { _datasetIndex: datasetIndex , options: { spanGaps } } = line;
const count = points.length;
const result = [];
let prevStyle = baseStyle;
let start = segments[0].start;
let i = start;
function addStyle(s, e, l, st) {
const dir = spanGaps ? -1 : 1;
if (s === e) {
return;
}
s += count;
while(points[s % count].skip){
s -= dir;
}
while(points[e % count].skip){
e += dir;
}
if (s % count !== e % count) {
result.push({
start: s % count,
end: e % count,
loop: l,
style: st
});
prevStyle = st;
start = e % count;
}
}
for (const segment of segments){
start = spanGaps ? start : segment.start;
let prev = points[start % count];
let style;
for(i = start + 1; i <= segment.end; i++){
const pt = points[i % count];
style = readStyle(segmentOptions.setContext(createContext(chartContext, {
type: 'segment',
p0: prev,
p1: pt,
p0DataIndex: (i - 1) % count,
p1DataIndex: i % count,
datasetIndex
})));
if (styleChanged(style, prevStyle)) {
addStyle(start, i - 1, segment.loop, prevStyle);
}
prev = pt;
prevStyle = style;
}
if (start < i - 1) {
addStyle(start, i - 1, segment.loop, prevStyle);
}
}
return result;
}
function readStyle(options) {
return {
backgroundColor: options.backgroundColor,
borderCapStyle: options.borderCapStyle,
borderDash: options.borderDash,
borderDashOffset: options.borderDashOffset,
borderJoinStyle: options.borderJoinStyle,
borderWidth: options.borderWidth,
borderColor: options.borderColor
};
}
function styleChanged(style, prevStyle) {
if (!prevStyle) {
return false;
}
const cache = [];
const replacer = function(key, value) {
if (!isPatternOrGradient(value)) {
return value;
}
if (!cache.includes(value)) {
cache.push(value);
}
return cache.indexOf(value);
};
return JSON.stringify(style, replacer) !== JSON.stringify(prevStyle, replacer);
}
function getSizeForArea(scale, chartArea, field) {
return scale.options.clip ? scale[field] : chartArea[field];
}
function getDatasetArea(meta, chartArea) {
const { xScale , yScale } = meta;
if (xScale && yScale) {
return {
left: getSizeForArea(xScale, chartArea, 'left'),
right: getSizeForArea(xScale, chartArea, 'right'),
top: getSizeForArea(yScale, chartArea, 'top'),
bottom: getSizeForArea(yScale, chartArea, 'bottom')
};
}
return chartArea;
}
function getDatasetClipArea(chart, meta) {
const clip = meta._clip;
if (clip.disabled) {
return false;
}
const area = getDatasetArea(meta, chart.chartArea);
return {
left: clip.left === false ? 0 : area.left - (clip.left === true ? 0 : clip.left),
right: clip.right === false ? chart.width : area.right + (clip.right === true ? 0 : clip.right),
top: clip.top === false ? 0 : area.top - (clip.top === true ? 0 : clip.top),
bottom: clip.bottom === false ? chart.height : area.bottom + (clip.bottom === true ? 0 : clip.bottom)
};
}
exports.HALF_PI = HALF_PI;
exports.INFINITY = INFINITY;
exports.PI = PI;
exports.PITAU = PITAU;
exports.QUARTER_PI = QUARTER_PI;
exports.RAD_PER_DEG = RAD_PER_DEG;
exports.TAU = TAU;
exports.TWO_THIRDS_PI = TWO_THIRDS_PI;
exports.Ticks = Ticks;
exports._addGrace = _addGrace;
exports._alignPixel = _alignPixel;
exports._alignStartEnd = _alignStartEnd;
exports._angleBetween = _angleBetween;
exports._angleDiff = _angleDiff;
exports._arrayUnique = _arrayUnique;
exports._attachContext = _attachContext;
exports._bezierCurveTo = _bezierCurveTo;
exports._bezierInterpolation = _bezierInterpolation;
exports._boundSegment = _boundSegment;
exports._boundSegments = _boundSegments;
exports._capitalize = _capitalize;
exports._computeSegments = _computeSegments;
exports._createResolver = _createResolver;
exports._decimalPlaces = _decimalPlaces;
exports._deprecated = _deprecated;
exports._descriptors = _descriptors;
exports._elementsEqual = _elementsEqual;
exports._factorize = _factorize;
exports._filterBetween = _filterBetween;
exports._getParentNode = _getParentNode;
exports._getStartAndCountOfVisiblePoints = _getStartAndCountOfVisiblePoints;
exports._int16Range = _int16Range;
exports._isBetween = _isBetween;
exports._isClickEvent = _isClickEvent;
exports._isDomSupported = _isDomSupported;
exports._isPointInArea = _isPointInArea;
exports._limitValue = _limitValue;
exports._longestText = _longestText;
exports._lookup = _lookup;
exports._lookupByKey = _lookupByKey;
exports._measureText = _measureText;
exports._merger = _merger;
exports._mergerIf = _mergerIf;
exports._normalizeAngle = _normalizeAngle;
exports._parseObjectDataRadialScale = _parseObjectDataRadialScale;
exports._pointInLine = _pointInLine;
exports._readValueToProps = _readValueToProps;
exports._rlookupByKey = _rlookupByKey;
exports._scaleRangesChanged = _scaleRangesChanged;
exports._setMinAndMaxByKey = _setMinAndMaxByKey;
exports._splitKey = _splitKey;
exports._steppedInterpolation = _steppedInterpolation;
exports._steppedLineTo = _steppedLineTo;
exports._textX = _textX;
exports._toLeftRightCenter = _toLeftRightCenter;
exports._updateBezierControlPoints = _updateBezierControlPoints;
exports.addRoundedRectPath = addRoundedRectPath;
exports.almostEquals = almostEquals;
exports.almostWhole = almostWhole;
exports.callback = callback;
exports.clearCanvas = clearCanvas;
exports.clipArea = clipArea;
exports.clone = clone;
exports.color = color;
exports.createContext = createContext;
exports.debounce = debounce;
exports.defaults = defaults;
exports.defined = defined;
exports.descriptors = descriptors;
exports.distanceBetweenPoints = distanceBetweenPoints;
exports.drawPoint = drawPoint;
exports.drawPointLegend = drawPointLegend;
exports.each = each;
exports.effects = effects;
exports.finiteOrDefault = finiteOrDefault;
exports.fontString = fontString;
exports.formatNumber = formatNumber;
exports.getAngleFromPoint = getAngleFromPoint;
exports.getDatasetClipArea = getDatasetClipArea;
exports.getHoverColor = getHoverColor;
exports.getMaximumSize = getMaximumSize;
exports.getRelativePosition = getRelativePosition;
exports.getRtlAdapter = getRtlAdapter;
exports.getStyle = getStyle;
exports.isArray = isArray;
exports.isFunction = isFunction;
exports.isNullOrUndef = isNullOrUndef;
exports.isNumber = isNumber;
exports.isNumberFinite = isNumberFinite;
exports.isObject = isObject;
exports.isPatternOrGradient = isPatternOrGradient;
exports.listenArrayEvents = listenArrayEvents;
exports.log10 = log10;
exports.merge = merge;
exports.mergeIf = mergeIf;
exports.niceNum = niceNum;
exports.noop = noop;
exports.overrideTextDirection = overrideTextDirection;
exports.overrides = overrides;
exports.readUsedSize = readUsedSize;
exports.renderText = renderText;
exports.requestAnimFrame = requestAnimFrame;
exports.resolve = resolve;
exports.resolveObjectKey = resolveObjectKey;
exports.restoreTextDirection = restoreTextDirection;
exports.retinaScale = retinaScale;
exports.setsEqual = setsEqual;
exports.sign = sign;
exports.splineCurve = splineCurve;
exports.splineCurveMonotone = splineCurveMonotone;
exports.supportsEventListenerOptions = supportsEventListenerOptions;
exports.throttled = throttled;
exports.toDegrees = toDegrees;
exports.toDimension = toDimension;
exports.toFont = toFont;
exports.toFontString = toFontString;
exports.toLineHeight = toLineHeight;
exports.toPadding = toPadding;
exports.toPercentage = toPercentage;
exports.toRadians = toRadians;
exports.toTRBL = toTRBL;
exports.toTRBLCorners = toTRBLCorners;
exports.uid = uid;
exports.unclipArea = unclipArea;
exports.unlistenArrayEvents = unlistenArrayEvents;
exports.valueOrDefault = valueOrDefault;
//# sourceMappingURL=helpers.dataset.cjs.map