Team:TJUSLS China/Description/chartjs
(function (global, factory) { typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(function() { try { return require('moment'); } catch(e) { } }()) : typeof define === 'function' && define.amd ? define(['require'], function(require) { return factory(function() { try { return require('moment'); } catch(e) { } }()); }) : (global.Chart = factory(global.moment)); }(this, (function (moment) { 'use strict';
moment = moment && moment.hasOwnProperty('default') ? moment['default'] : moment;
/* MIT license */
var conversions = {
rgb2hsl: rgb2hsl, rgb2hsv: rgb2hsv, rgb2hwb: rgb2hwb, rgb2cmyk: rgb2cmyk, rgb2keyword: rgb2keyword, rgb2xyz: rgb2xyz, rgb2lab: rgb2lab, rgb2lch: rgb2lch,
hsl2rgb: hsl2rgb, hsl2hsv: hsl2hsv, hsl2hwb: hsl2hwb, hsl2cmyk: hsl2cmyk, hsl2keyword: hsl2keyword,
hsv2rgb: hsv2rgb, hsv2hsl: hsv2hsl, hsv2hwb: hsv2hwb, hsv2cmyk: hsv2cmyk, hsv2keyword: hsv2keyword,
hwb2rgb: hwb2rgb, hwb2hsl: hwb2hsl, hwb2hsv: hwb2hsv, hwb2cmyk: hwb2cmyk, hwb2keyword: hwb2keyword,
cmyk2rgb: cmyk2rgb, cmyk2hsl: cmyk2hsl, cmyk2hsv: cmyk2hsv, cmyk2hwb: cmyk2hwb, cmyk2keyword: cmyk2keyword,
keyword2rgb: keyword2rgb, keyword2hsl: keyword2hsl, keyword2hsv: keyword2hsv, keyword2hwb: keyword2hwb, keyword2cmyk: keyword2cmyk, keyword2lab: keyword2lab, keyword2xyz: keyword2xyz,
xyz2rgb: xyz2rgb, xyz2lab: xyz2lab, xyz2lch: xyz2lch,
lab2xyz: lab2xyz, lab2rgb: lab2rgb, lab2lch: lab2lch,
lch2lab: lch2lab, lch2xyz: lch2xyz, lch2rgb: lch2rgb
};
function rgb2hsl(rgb) {
var r = rgb[0]/255,
g = rgb[1]/255,
b = rgb[2]/255,
min = Math.min(r, g, b),
max = Math.max(r, g, b),
delta = max - min,
h, s, l;
if (max == min) h = 0; else if (r == max) h = (g - b) / delta; else if (g == max) h = 2 + (b - r) / delta; else if (b == max) h = 4 + (r - g)/ delta;
h = Math.min(h * 60, 360);
if (h < 0) h += 360;
l = (min + max) / 2;
if (max == min) s = 0; else if (l <= 0.5) s = delta / (max + min); else s = delta / (2 - max - min);
return [h, s * 100, l * 100];
}
function rgb2hsv(rgb) {
var r = rgb[0],
g = rgb[1],
b = rgb[2],
min = Math.min(r, g, b),
max = Math.max(r, g, b),
delta = max - min,
h, s, v;
if (max == 0) s = 0; else s = (delta/max * 1000)/10;
if (max == min) h = 0; else if (r == max) h = (g - b) / delta; else if (g == max) h = 2 + (b - r) / delta; else if (b == max) h = 4 + (r - g) / delta;
h = Math.min(h * 60, 360);
if (h < 0) h += 360;
v = ((max / 255) * 1000) / 10;
return [h, s, v];
}
function rgb2hwb(rgb) {
var r = rgb[0],
g = rgb[1],
b = rgb[2],
h = rgb2hsl(rgb)[0],
w = 1/255 * Math.min(r, Math.min(g, b)),
b = 1 - 1/255 * Math.max(r, Math.max(g, b));
return [h, w * 100, b * 100];
}
function rgb2cmyk(rgb) {
var r = rgb[0] / 255,
g = rgb[1] / 255,
b = rgb[2] / 255,
c, m, y, k;
k = Math.min(1 - r, 1 - g, 1 - b); c = (1 - r - k) / (1 - k) || 0; m = (1 - g - k) / (1 - k) || 0; y = (1 - b - k) / (1 - k) || 0; return [c * 100, m * 100, y * 100, k * 100];
}
function rgb2keyword(rgb) {
return reverseKeywords[JSON.stringify(rgb)];
}
function rgb2xyz(rgb) {
var r = rgb[0] / 255,
g = rgb[1] / 255,
b = rgb[2] / 255;
// assume sRGB r = r > 0.04045 ? Math.pow(((r + 0.055) / 1.055), 2.4) : (r / 12.92); g = g > 0.04045 ? Math.pow(((g + 0.055) / 1.055), 2.4) : (g / 12.92); b = b > 0.04045 ? Math.pow(((b + 0.055) / 1.055), 2.4) : (b / 12.92);
var x = (r * 0.4124) + (g * 0.3576) + (b * 0.1805); var y = (r * 0.2126) + (g * 0.7152) + (b * 0.0722); var z = (r * 0.0193) + (g * 0.1192) + (b * 0.9505);
return [x * 100, y *100, z * 100];
}
function rgb2lab(rgb) {
var xyz = rgb2xyz(rgb),
x = xyz[0],
y = xyz[1],
z = xyz[2],
l, a, b;
x /= 95.047; y /= 100; z /= 108.883;
x = x > 0.008856 ? Math.pow(x, 1/3) : (7.787 * x) + (16 / 116); y = y > 0.008856 ? Math.pow(y, 1/3) : (7.787 * y) + (16 / 116); z = z > 0.008856 ? Math.pow(z, 1/3) : (7.787 * z) + (16 / 116);
l = (116 * y) - 16; a = 500 * (x - y); b = 200 * (y - z);
return [l, a, b];
}
function rgb2lch(args) {
return lab2lch(rgb2lab(args));
}
function hsl2rgb(hsl) {
var h = hsl[0] / 360,
s = hsl[1] / 100,
l = hsl[2] / 100,
t1, t2, t3, rgb, val;
if (s == 0) {
val = l * 255;
return [val, val, val];
}
if (l < 0.5) t2 = l * (1 + s); else t2 = l + s - l * s; t1 = 2 * l - t2;
rgb = [0, 0, 0];
for (var i = 0; i < 3; i++) {
t3 = h + 1 / 3 * - (i - 1);
t3 < 0 && t3++;
t3 > 1 && t3--;
if (6 * t3 < 1)
val = t1 + (t2 - t1) * 6 * t3;
else if (2 * t3 < 1)
val = t2;
else if (3 * t3 < 2)
val = t1 + (t2 - t1) * (2 / 3 - t3) * 6;
else
val = t1;
rgb[i] = val * 255; }
return rgb;
}
function hsl2hsv(hsl) {
var h = hsl[0],
s = hsl[1] / 100,
l = hsl[2] / 100,
sv, v;
if(l === 0) {
// no need to do calc on black
// also avoids divide by 0 error
return [0, 0, 0];
}
l *= 2; s *= (l <= 1) ? l : 2 - l; v = (l + s) / 2; sv = (2 * s) / (l + s); return [h, sv * 100, v * 100];
}
function hsl2hwb(args) {
return rgb2hwb(hsl2rgb(args));
}
function hsl2cmyk(args) {
return rgb2cmyk(hsl2rgb(args));
}
function hsl2keyword(args) {
return rgb2keyword(hsl2rgb(args));
}
function hsv2rgb(hsv) {
var h = hsv[0] / 60,
s = hsv[1] / 100,
v = hsv[2] / 100,
hi = Math.floor(h) % 6;
var f = h - Math.floor(h),
p = 255 * v * (1 - s),
q = 255 * v * (1 - (s * f)),
t = 255 * v * (1 - (s * (1 - f))),
v = 255 * v;
switch(hi) {
case 0:
return [v, t, p];
case 1:
return [q, v, p];
case 2:
return [p, v, t];
case 3:
return [p, q, v];
case 4:
return [t, p, v];
case 5:
return [v, p, q];
}
}
function hsv2hsl(hsv) {
var h = hsv[0],
s = hsv[1] / 100,
v = hsv[2] / 100,
sl, l;
l = (2 - s) * v; sl = s * v; sl /= (l <= 1) ? l : 2 - l; sl = sl || 0; l /= 2; return [h, sl * 100, l * 100];
}
function hsv2hwb(args) {
return rgb2hwb(hsv2rgb(args))
}
function hsv2cmyk(args) {
return rgb2cmyk(hsv2rgb(args));
}
function hsv2keyword(args) {
return rgb2keyword(hsv2rgb(args));
}
// http://dev.w3.org/csswg/css-color/#hwb-to-rgb function hwb2rgb(hwb) {
var h = hwb[0] / 360,
wh = hwb[1] / 100,
bl = hwb[2] / 100,
ratio = wh + bl,
i, v, f, n;
// wh + bl cant be > 1
if (ratio > 1) {
wh /= ratio;
bl /= ratio;
}
i = Math.floor(6 * h);
v = 1 - bl;
f = 6 * h - i;
if ((i & 0x01) != 0) {
f = 1 - f;
}
n = wh + f * (v - wh); // linear interpolation
switch (i) {
default:
case 6:
case 0: r = v; g = n; b = wh; break;
case 1: r = n; g = v; b = wh; break;
case 2: r = wh; g = v; b = n; break;
case 3: r = wh; g = n; b = v; break;
case 4: r = n; g = wh; b = v; break;
case 5: r = v; g = wh; b = n; break;
}
return [r * 255, g * 255, b * 255];
}
function hwb2hsl(args) {
return rgb2hsl(hwb2rgb(args));
}
function hwb2hsv(args) {
return rgb2hsv(hwb2rgb(args));
}
function hwb2cmyk(args) {
return rgb2cmyk(hwb2rgb(args));
}
function hwb2keyword(args) {
return rgb2keyword(hwb2rgb(args));
}
function cmyk2rgb(cmyk) {
var c = cmyk[0] / 100,
m = cmyk[1] / 100,
y = cmyk[2] / 100,
k = cmyk[3] / 100,
r, g, b;
r = 1 - Math.min(1, c * (1 - k) + k); g = 1 - Math.min(1, m * (1 - k) + k); b = 1 - Math.min(1, y * (1 - k) + k); return [r * 255, g * 255, b * 255];
}
function cmyk2hsl(args) {
return rgb2hsl(cmyk2rgb(args));
}
function cmyk2hsv(args) {
return rgb2hsv(cmyk2rgb(args));
}
function cmyk2hwb(args) {
return rgb2hwb(cmyk2rgb(args));
}
function cmyk2keyword(args) {
return rgb2keyword(cmyk2rgb(args));
}
function xyz2rgb(xyz) {
var x = xyz[0] / 100,
y = xyz[1] / 100,
z = xyz[2] / 100,
r, g, b;
r = (x * 3.2406) + (y * -1.5372) + (z * -0.4986); g = (x * -0.9689) + (y * 1.8758) + (z * 0.0415); b = (x * 0.0557) + (y * -0.2040) + (z * 1.0570);
// assume sRGB r = r > 0.0031308 ? ((1.055 * Math.pow(r, 1.0 / 2.4)) - 0.055) : r = (r * 12.92);
g = g > 0.0031308 ? ((1.055 * Math.pow(g, 1.0 / 2.4)) - 0.055) : g = (g * 12.92);
b = b > 0.0031308 ? ((1.055 * Math.pow(b, 1.0 / 2.4)) - 0.055) : b = (b * 12.92);
r = Math.min(Math.max(0, r), 1); g = Math.min(Math.max(0, g), 1); b = Math.min(Math.max(0, b), 1);
return [r * 255, g * 255, b * 255];
}
function xyz2lab(xyz) {
var x = xyz[0],
y = xyz[1],
z = xyz[2],
l, a, b;
x /= 95.047; y /= 100; z /= 108.883;
x = x > 0.008856 ? Math.pow(x, 1/3) : (7.787 * x) + (16 / 116); y = y > 0.008856 ? Math.pow(y, 1/3) : (7.787 * y) + (16 / 116); z = z > 0.008856 ? Math.pow(z, 1/3) : (7.787 * z) + (16 / 116);
l = (116 * y) - 16; a = 500 * (x - y); b = 200 * (y - z);
return [l, a, b];
}
function xyz2lch(args) {
return lab2lch(xyz2lab(args));
}
function lab2xyz(lab) {
var l = lab[0],
a = lab[1],
b = lab[2],
x, y, z, y2;
if (l <= 8) {
y = (l * 100) / 903.3;
y2 = (7.787 * (y / 100)) + (16 / 116);
} else {
y = 100 * Math.pow((l + 16) / 116, 3);
y2 = Math.pow(y / 100, 1/3);
}
x = x / 95.047 <= 0.008856 ? x = (95.047 * ((a / 500) + y2 - (16 / 116))) / 7.787 : 95.047 * Math.pow((a / 500) + y2, 3);
z = z / 108.883 <= 0.008859 ? z = (108.883 * (y2 - (b / 200) - (16 / 116))) / 7.787 : 108.883 * Math.pow(y2 - (b / 200), 3);
return [x, y, z];
}
function lab2lch(lab) {
var l = lab[0],
a = lab[1],
b = lab[2],
hr, h, c;
hr = Math.atan2(b, a);
h = hr * 360 / 2 / Math.PI;
if (h < 0) {
h += 360;
}
c = Math.sqrt(a * a + b * b);
return [l, c, h];
}
function lab2rgb(args) {
return xyz2rgb(lab2xyz(args));
}
function lch2lab(lch) {
var l = lch[0],
c = lch[1],
h = lch[2],
a, b, hr;
hr = h / 360 * 2 * Math.PI; a = c * Math.cos(hr); b = c * Math.sin(hr); return [l, a, b];
}
function lch2xyz(args) {
return lab2xyz(lch2lab(args));
}
function lch2rgb(args) {
return lab2rgb(lch2lab(args));
}
function keyword2rgb(keyword) {
return cssKeywords[keyword];
}
function keyword2hsl(args) {
return rgb2hsl(keyword2rgb(args));
}
function keyword2hsv(args) {
return rgb2hsv(keyword2rgb(args));
}
function keyword2hwb(args) {
return rgb2hwb(keyword2rgb(args));
}
function keyword2cmyk(args) {
return rgb2cmyk(keyword2rgb(args));
}
function keyword2lab(args) {
return rgb2lab(keyword2rgb(args));
}
function keyword2xyz(args) {
return rgb2xyz(keyword2rgb(args));
}
var cssKeywords = {
aliceblue: [240,248,255], antiquewhite: [250,235,215], aqua: [0,255,255], aquamarine: [127,255,212], azure: [240,255,255], beige: [245,245,220], bisque: [255,228,196], black: [0,0,0], blanchedalmond: [255,235,205], blue: [0,0,255], blueviolet: [138,43,226], brown: [165,42,42], burlywood: [222,184,135], cadetblue: [95,158,160], chartreuse: [127,255,0], chocolate: [210,105,30], coral: [255,127,80], cornflowerblue: [100,149,237], cornsilk: [255,248,220], crimson: [220,20,60], cyan: [0,255,255], darkblue: [0,0,139], darkcyan: [0,139,139], darkgoldenrod: [184,134,11], darkgray: [169,169,169], darkgreen: [0,100,0], darkgrey: [169,169,169], darkkhaki: [189,183,107], darkmagenta: [139,0,139], darkolivegreen: [85,107,47], darkorange: [255,140,0], darkorchid: [153,50,204], darkred: [139,0,0], darksalmon: [233,150,122], darkseagreen: [143,188,143], darkslateblue: [72,61,139], darkslategray: [47,79,79], darkslategrey: [47,79,79], darkturquoise: [0,206,209], darkviolet: [148,0,211], deeppink: [255,20,147], deepskyblue: [0,191,255], dimgray: [105,105,105], dimgrey: [105,105,105], dodgerblue: [30,144,255], firebrick: [178,34,34], floralwhite: [255,250,240], forestgreen: [34,139,34], fuchsia: [255,0,255], gainsboro: [220,220,220], ghostwhite: [248,248,255], gold: [255,215,0], goldenrod: [218,165,32], gray: [128,128,128], green: [0,128,0], greenyellow: [173,255,47], grey: [128,128,128], honeydew: [240,255,240], hotpink: [255,105,180], indianred: [205,92,92], indigo: [75,0,130], ivory: [255,255,240], khaki: [240,230,140], lavender: [230,230,250], lavenderblush: [255,240,245], lawngreen: [124,252,0], lemonchiffon: [255,250,205], lightblue: [173,216,230], lightcoral: [240,128,128], lightcyan: [224,255,255], lightgoldenrodyellow: [250,250,210], lightgray: [211,211,211], lightgreen: [144,238,144], lightgrey: [211,211,211], lightpink: [255,182,193], lightsalmon: [255,160,122], lightseagreen: [32,178,170], lightskyblue: [135,206,250], lightslategray: [119,136,153], lightslategrey: [119,136,153], lightsteelblue: [176,196,222], lightyellow: [255,255,224], lime: [0,255,0], limegreen: [50,205,50], linen: [250,240,230], magenta: [255,0,255], maroon: [128,0,0], mediumaquamarine: [102,205,170], mediumblue: [0,0,205], mediumorchid: [186,85,211], mediumpurple: [147,112,219], mediumseagreen: [60,179,113], mediumslateblue: [123,104,238], mediumspringgreen: [0,250,154], mediumturquoise: [72,209,204], mediumvioletred: [199,21,133], midnightblue: [25,25,112], mintcream: [245,255,250], mistyrose: [255,228,225], moccasin: [255,228,181], navajowhite: [255,222,173], navy: [0,0,128], oldlace: [253,245,230], olive: [128,128,0], olivedrab: [107,142,35], orange: [255,165,0], orangered: [255,69,0], orchid: [218,112,214], palegoldenrod: [238,232,170], palegreen: [152,251,152], paleturquoise: [175,238,238], palevioletred: [219,112,147], papayawhip: [255,239,213], peachpuff: [255,218,185], peru: [205,133,63], pink: [255,192,203], plum: [221,160,221], powderblue: [176,224,230], purple: [128,0,128], rebeccapurple: [102, 51, 153], red: [255,0,0], rosybrown: [188,143,143], royalblue: [65,105,225], saddlebrown: [139,69,19], salmon: [250,128,114], sandybrown: [244,164,96], seagreen: [46,139,87], seashell: [255,245,238], sienna: [160,82,45], silver: [192,192,192], skyblue: [135,206,235], slateblue: [106,90,205], slategray: [112,128,144], slategrey: [112,128,144], snow: [255,250,250], springgreen: [0,255,127], steelblue: [70,130,180], tan: [210,180,140], teal: [0,128,128], thistle: [216,191,216], tomato: [255,99,71], turquoise: [64,224,208], violet: [238,130,238], wheat: [245,222,179], white: [255,255,255], whitesmoke: [245,245,245], yellow: [255,255,0], yellowgreen: [154,205,50]
};
var reverseKeywords = {}; for (var key in cssKeywords) {
reverseKeywords[JSON.stringify(cssKeywords[key])] = key;
}
var convert = function() {
return new Converter();
};
for (var func in conversions) {
// export Raw versions
convert[func + "Raw"] = (function(func) {
// accept array or plain args
return function(arg) {
if (typeof arg == "number")
arg = Array.prototype.slice.call(arguments);
return conversions[func](arg);
}
})(func);
var pair = /(\w+)2(\w+)/.exec(func),
from = pair[1],
to = pair[2];
// export rgb2hsl and ["rgb"]["hsl"]
convert[from] = convert[from] || {};
convert[from][to] = convert[func] = (function(func) {
return function(arg) {
if (typeof arg == "number")
arg = Array.prototype.slice.call(arguments);
var val = conversions[func](arg);
if (typeof val == "string" || val === undefined)
return val; // keyword
for (var i = 0; i < val.length; i++)
val[i] = Math.round(val[i]);
return val;
}
})(func);
}
/* Converter does lazy conversion and caching */
var Converter = function() {
this.convs = {};
};
/* Either get the values for a space or
set the values for a space, depending on args */
Converter.prototype.routeSpace = function(space, args) {
var values = args[0];
if (values === undefined) {
// color.rgb()
return this.getValues(space);
}
// color.rgb(10, 10, 10)
if (typeof values == "number") {
values = Array.prototype.slice.call(args);
}
return this.setValues(space, values);
};
/* Set the values for a space, invalidating cache */ Converter.prototype.setValues = function(space, values) {
this.space = space;
this.convs = {};
this.convs[space] = values;
return this;
};
/* Get the values for a space. If there's already
a conversion for the space, fetch it, otherwise compute it */
Converter.prototype.getValues = function(space) {
var vals = this.convs[space];
if (!vals) {
var fspace = this.space,
from = this.convs[fspace];
vals = convert[fspace][space](from);
this.convs[space] = vals; } return vals;
};
["rgb", "hsl", "hsv", "cmyk", "keyword"].forEach(function(space) {
Converter.prototype[space] = function(vals) {
return this.routeSpace(space, arguments);
};
});
var colorConvert = convert;
var colorName = { "aliceblue": [240, 248, 255], "antiquewhite": [250, 235, 215], "aqua": [0, 255, 255], "aquamarine": [127, 255, 212], "azure": [240, 255, 255], "beige": [245, 245, 220], "bisque": [255, 228, 196], "black": [0, 0, 0], "blanchedalmond": [255, 235, 205], "blue": [0, 0, 255], "blueviolet": [138, 43, 226], "brown": [165, 42, 42], "burlywood": [222, 184, 135], "cadetblue": [95, 158, 160], "chartreuse": [127, 255, 0], "chocolate": [210, 105, 30], "coral": [255, 127, 80], "cornflowerblue": [100, 149, 237], "cornsilk": [255, 248, 220], "crimson": [220, 20, 60], "cyan": [0, 255, 255], "darkblue": [0, 0, 139], "darkcyan": [0, 139, 139], "darkgoldenrod": [184, 134, 11], "darkgray": [169, 169, 169], "darkgreen": [0, 100, 0], "darkgrey": [169, 169, 169], "darkkhaki": [189, 183, 107], "darkmagenta": [139, 0, 139], "darkolivegreen": [85, 107, 47], "darkorange": [255, 140, 0], "darkorchid": [153, 50, 204], "darkred": [139, 0, 0], "darksalmon": [233, 150, 122], "darkseagreen": [143, 188, 143], "darkslateblue": [72, 61, 139], "darkslategray": [47, 79, 79], "darkslategrey": [47, 79, 79], "darkturquoise": [0, 206, 209], "darkviolet": [148, 0, 211], "deeppink": [255, 20, 147], "deepskyblue": [0, 191, 255], "dimgray": [105, 105, 105], "dimgrey": [105, 105, 105], "dodgerblue": [30, 144, 255], "firebrick": [178, 34, 34], "floralwhite": [255, 250, 240], "forestgreen": [34, 139, 34], "fuchsia": [255, 0, 255], "gainsboro": [220, 220, 220], "ghostwhite": [248, 248, 255], "gold": [255, 215, 0], "goldenrod": [218, 165, 32], "gray": [128, 128, 128], "green": [0, 128, 0], "greenyellow": [173, 255, 47], "grey": [128, 128, 128], "honeydew": [240, 255, 240], "hotpink": [255, 105, 180], "indianred": [205, 92, 92], "indigo": [75, 0, 130], "ivory": [255, 255, 240], "khaki": [240, 230, 140], "lavender": [230, 230, 250], "lavenderblush": [255, 240, 245], "lawngreen": [124, 252, 0], "lemonchiffon": [255, 250, 205], "lightblue": [173, 216, 230], "lightcoral": [240, 128, 128], "lightcyan": [224, 255, 255], "lightgoldenrodyellow": [250, 250, 210], "lightgray": [211, 211, 211], "lightgreen": [144, 238, 144], "lightgrey": [211, 211, 211], "lightpink": [255, 182, 193], "lightsalmon": [255, 160, 122], "lightseagreen": [32, 178, 170], "lightskyblue": [135, 206, 250], "lightslategray": [119, 136, 153], "lightslategrey": [119, 136, 153], "lightsteelblue": [176, 196, 222], "lightyellow": [255, 255, 224], "lime": [0, 255, 0], "limegreen": [50, 205, 50], "linen": [250, 240, 230], "magenta": [255, 0, 255], "maroon": [128, 0, 0], "mediumaquamarine": [102, 205, 170], "mediumblue": [0, 0, 205], "mediumorchid": [186, 85, 211], "mediumpurple": [147, 112, 219], "mediumseagreen": [60, 179, 113], "mediumslateblue": [123, 104, 238], "mediumspringgreen": [0, 250, 154], "mediumturquoise": [72, 209, 204], "mediumvioletred": [199, 21, 133], "midnightblue": [25, 25, 112], "mintcream": [245, 255, 250], "mistyrose": [255, 228, 225], "moccasin": [255, 228, 181], "navajowhite": [255, 222, 173], "navy": [0, 0, 128], "oldlace": [253, 245, 230], "olive": [128, 128, 0], "olivedrab": [107, 142, 35], "orange": [255, 165, 0], "orangered": [255, 69, 0], "orchid": [218, 112, 214], "palegoldenrod": [238, 232, 170], "palegreen": [152, 251, 152], "paleturquoise": [175, 238, 238], "palevioletred": [219, 112, 147], "papayawhip": [255, 239, 213], "peachpuff": [255, 218, 185], "peru": [205, 133, 63], "pink": [255, 192, 203], "plum": [221, 160, 221], "powderblue": [176, 224, 230], "purple": [128, 0, 128], "rebeccapurple": [102, 51, 153], "red": [255, 0, 0], "rosybrown": [188, 143, 143], "royalblue": [65, 105, 225], "saddlebrown": [139, 69, 19], "salmon": [250, 128, 114], "sandybrown": [244, 164, 96], "seagreen": [46, 139, 87], "seashell": [255, 245, 238], "sienna": [160, 82, 45], "silver": [192, 192, 192], "skyblue": [135, 206, 235], "slateblue": [106, 90, 205], "slategray": [112, 128, 144], "slategrey": [112, 128, 144], "snow": [255, 250, 250], "springgreen": [0, 255, 127], "steelblue": [70, 130, 180], "tan": [210, 180, 140], "teal": [0, 128, 128], "thistle": [216, 191, 216], "tomato": [255, 99, 71], "turquoise": [64, 224, 208], "violet": [238, 130, 238], "wheat": [245, 222, 179], "white": [255, 255, 255], "whitesmoke": [245, 245, 245], "yellow": [255, 255, 0], "yellowgreen": [154, 205, 50] };
/* MIT license */
var colorString = {
getRgba: getRgba, getHsla: getHsla, getRgb: getRgb, getHsl: getHsl, getHwb: getHwb, getAlpha: getAlpha,
hexString: hexString, rgbString: rgbString, rgbaString: rgbaString, percentString: percentString, percentaString: percentaString, hslString: hslString, hslaString: hslaString, hwbString: hwbString, keyword: keyword
};
function getRgba(string) {
if (!string) {
return;
}
var abbr = /^#([a-fA-F0-9]{3,4})$/i,
hex = /^#([a-fA-F0-9]{6}([a-fA-F0-9]{2})?)$/i,
rgba = /^rgba?\(\s*([+-]?\d+)\s*,\s*([+-]?\d+)\s*,\s*([+-]?\d+)\s*(?:,\s*([+-]?[\d\.]+)\s*)?\)$/i,
per = /^rgba?\(\s*([+-]?[\d\.]+)\%\s*,\s*([+-]?[\d\.]+)\%\s*,\s*([+-]?[\d\.]+)\%\s*(?:,\s*([+-]?[\d\.]+)\s*)?\)$/i,
keyword = /(\w+)/;
var rgb = [0, 0, 0],
a = 1,
match = string.match(abbr),
hexAlpha = "";
if (match) {
match = match[1];
hexAlpha = match[3];
for (var i = 0; i < rgb.length; i++) {
rgb[i] = parseInt(match[i] + match[i], 16);
}
if (hexAlpha) {
a = Math.round((parseInt(hexAlpha + hexAlpha, 16) / 255) * 100) / 100;
}
}
else if (match = string.match(hex)) {
hexAlpha = match[2];
match = match[1];
for (var i = 0; i < rgb.length; i++) {
rgb[i] = parseInt(match.slice(i * 2, i * 2 + 2), 16);
}
if (hexAlpha) {
a = Math.round((parseInt(hexAlpha, 16) / 255) * 100) / 100;
}
}
else if (match = string.match(rgba)) {
for (var i = 0; i < rgb.length; i++) {
rgb[i] = parseInt(match[i + 1]);
}
a = parseFloat(match[4]);
}
else if (match = string.match(per)) {
for (var i = 0; i < rgb.length; i++) {
rgb[i] = Math.round(parseFloat(match[i + 1]) * 2.55);
}
a = parseFloat(match[4]);
}
else if (match = string.match(keyword)) {
if (match[1] == "transparent") {
return [0, 0, 0, 0];
}
rgb = colorName[match[1]];
if (!rgb) {
return;
}
}
for (var i = 0; i < rgb.length; i++) {
rgb[i] = scale(rgb[i], 0, 255);
}
if (!a && a != 0) {
a = 1;
}
else {
a = scale(a, 0, 1);
}
rgb[3] = a;
return rgb;
}
function getHsla(string) {
if (!string) {
return;
}
var hsl = /^hsla?\(\s*([+-]?\d+)(?:deg)?\s*,\s*([+-]?[\d\.]+)%\s*,\s*([+-]?[\d\.]+)%\s*(?:,\s*([+-]?[\d\.]+)\s*)?\)/;
var match = string.match(hsl);
if (match) {
var alpha = parseFloat(match[4]);
var h = scale(parseInt(match[1]), 0, 360),
s = scale(parseFloat(match[2]), 0, 100),
l = scale(parseFloat(match[3]), 0, 100),
a = scale(isNaN(alpha) ? 1 : alpha, 0, 1);
return [h, s, l, a];
}
}
function getHwb(string) {
if (!string) {
return;
}
var hwb = /^hwb\(\s*([+-]?\d+)(?:deg)?\s*,\s*([+-]?[\d\.]+)%\s*,\s*([+-]?[\d\.]+)%\s*(?:,\s*([+-]?[\d\.]+)\s*)?\)/;
var match = string.match(hwb);
if (match) {
var alpha = parseFloat(match[4]);
var h = scale(parseInt(match[1]), 0, 360),
w = scale(parseFloat(match[2]), 0, 100),
b = scale(parseFloat(match[3]), 0, 100),
a = scale(isNaN(alpha) ? 1 : alpha, 0, 1);
return [h, w, b, a];
}
}
function getRgb(string) {
var rgba = getRgba(string); return rgba && rgba.slice(0, 3);
}
function getHsl(string) {
var hsla = getHsla(string); return hsla && hsla.slice(0, 3);
}
function getAlpha(string) {
var vals = getRgba(string);
if (vals) {
return vals[3];
}
else if (vals = getHsla(string)) {
return vals[3];
}
else if (vals = getHwb(string)) {
return vals[3];
}
}
// generators function hexString(rgba, a) {
var a = (a !== undefined && rgba.length === 3) ? a : rgba[3];
return "#" + hexDouble(rgba[0])
+ hexDouble(rgba[1])
+ hexDouble(rgba[2])
+ (
(a >= 0 && a < 1)
? hexDouble(Math.round(a * 255))
: ""
);
}
function rgbString(rgba, alpha) {
if (alpha < 1 || (rgba[3] && rgba[3] < 1)) {
return rgbaString(rgba, alpha);
}
return "rgb(" + rgba[0] + ", " + rgba[1] + ", " + rgba[2] + ")";
}
function rgbaString(rgba, alpha) {
if (alpha === undefined) {
alpha = (rgba[3] !== undefined ? rgba[3] : 1);
}
return "rgba(" + rgba[0] + ", " + rgba[1] + ", " + rgba[2]
+ ", " + alpha + ")";
}
function percentString(rgba, alpha) {
if (alpha < 1 || (rgba[3] && rgba[3] < 1)) {
return percentaString(rgba, alpha);
}
var r = Math.round(rgba[0]/255 * 100),
g = Math.round(rgba[1]/255 * 100),
b = Math.round(rgba[2]/255 * 100);
return "rgb(" + r + "%, " + g + "%, " + b + "%)";
}
function percentaString(rgba, alpha) {
var r = Math.round(rgba[0]/255 * 100),
g = Math.round(rgba[1]/255 * 100),
b = Math.round(rgba[2]/255 * 100);
return "rgba(" + r + "%, " + g + "%, " + b + "%, " + (alpha || rgba[3] || 1) + ")";
}
function hslString(hsla, alpha) {
if (alpha < 1 || (hsla[3] && hsla[3] < 1)) {
return hslaString(hsla, alpha);
}
return "hsl(" + hsla[0] + ", " + hsla[1] + "%, " + hsla[2] + "%)";
}
function hslaString(hsla, alpha) {
if (alpha === undefined) {
alpha = (hsla[3] !== undefined ? hsla[3] : 1);
}
return "hsla(" + hsla[0] + ", " + hsla[1] + "%, " + hsla[2] + "%, "
+ alpha + ")";
}
// hwb is a bit different than rgb(a) & hsl(a) since there is no alpha specific syntax // (hwb have alpha optional & 1 is default value) function hwbString(hwb, alpha) {
if (alpha === undefined) {
alpha = (hwb[3] !== undefined ? hwb[3] : 1);
}
return "hwb(" + hwb[0] + ", " + hwb[1] + "%, " + hwb[2] + "%"
+ (alpha !== undefined && alpha !== 1 ? ", " + alpha : "") + ")";
}
function keyword(rgb) {
return reverseNames[rgb.slice(0, 3)];
}
// helpers function scale(num, min, max) {
return Math.min(Math.max(min, num), max);
}
function hexDouble(num) {
var str = num.toString(16).toUpperCase(); return (str.length < 2) ? "0" + str : str;
}
//create a list of reverse color names
var reverseNames = {};
for (var name in colorName) {
reverseNames[colorName[name]] = name;
}
/* MIT license */
var Color = function (obj) { if (obj instanceof Color) { return obj; } if (!(this instanceof Color)) { return new Color(obj); }
this.valid = false; this.values = { rgb: [0, 0, 0], hsl: [0, 0, 0], hsv: [0, 0, 0], hwb: [0, 0, 0], cmyk: [0, 0, 0, 0], alpha: 1 };
// parse Color() argument var vals; if (typeof obj === 'string') { vals = colorString.getRgba(obj); if (vals) { this.setValues('rgb', vals); } else if (vals = colorString.getHsla(obj)) { this.setValues('hsl', vals); } else if (vals = colorString.getHwb(obj)) { this.setValues('hwb', vals); } } else if (typeof obj === 'object') { vals = obj; if (vals.r !== undefined || vals.red !== undefined) { this.setValues('rgb', vals); } else if (vals.l !== undefined || vals.lightness !== undefined) { this.setValues('hsl', vals); } else if (vals.v !== undefined || vals.value !== undefined) { this.setValues('hsv', vals); } else if (vals.w !== undefined || vals.whiteness !== undefined) { this.setValues('hwb', vals); } else if (vals.c !== undefined || vals.cyan !== undefined) { this.setValues('cmyk', vals); } } };
Color.prototype = { isValid: function () { return this.valid; }, rgb: function () { return this.setSpace('rgb', arguments); }, hsl: function () { return this.setSpace('hsl', arguments); }, hsv: function () { return this.setSpace('hsv', arguments); }, hwb: function () { return this.setSpace('hwb', arguments); }, cmyk: function () { return this.setSpace('cmyk', arguments); },
rgbArray: function () { return this.values.rgb; }, hslArray: function () { return this.values.hsl; }, hsvArray: function () { return this.values.hsv; }, hwbArray: function () { var values = this.values; if (values.alpha !== 1) { return values.hwb.concat([values.alpha]); } return values.hwb; }, cmykArray: function () { return this.values.cmyk; }, rgbaArray: function () { var values = this.values; return values.rgb.concat([values.alpha]); }, hslaArray: function () { var values = this.values; return values.hsl.concat([values.alpha]); }, alpha: function (val) { if (val === undefined) { return this.values.alpha; } this.setValues('alpha', val); return this; },
red: function (val) { return this.setChannel('rgb', 0, val); }, green: function (val) { return this.setChannel('rgb', 1, val); }, blue: function (val) { return this.setChannel('rgb', 2, val); }, hue: function (val) { if (val) { val %= 360; val = val < 0 ? 360 + val : val; } return this.setChannel('hsl', 0, val); }, saturation: function (val) { return this.setChannel('hsl', 1, val); }, lightness: function (val) { return this.setChannel('hsl', 2, val); }, saturationv: function (val) { return this.setChannel('hsv', 1, val); }, whiteness: function (val) { return this.setChannel('hwb', 1, val); }, blackness: function (val) { return this.setChannel('hwb', 2, val); }, value: function (val) { return this.setChannel('hsv', 2, val); }, cyan: function (val) { return this.setChannel('cmyk', 0, val); }, magenta: function (val) { return this.setChannel('cmyk', 1, val); }, yellow: function (val) { return this.setChannel('cmyk', 2, val); }, black: function (val) { return this.setChannel('cmyk', 3, val); },
hexString: function () { return colorString.hexString(this.values.rgb); }, rgbString: function () { return colorString.rgbString(this.values.rgb, this.values.alpha); }, rgbaString: function () { return colorString.rgbaString(this.values.rgb, this.values.alpha); }, percentString: function () { return colorString.percentString(this.values.rgb, this.values.alpha); }, hslString: function () { return colorString.hslString(this.values.hsl, this.values.alpha); }, hslaString: function () { return colorString.hslaString(this.values.hsl, this.values.alpha); }, hwbString: function () { return colorString.hwbString(this.values.hwb, this.values.alpha); }, keyword: function () { return colorString.keyword(this.values.rgb, this.values.alpha); },
rgbNumber: function () { var rgb = this.values.rgb; return (rgb[0] << 16) | (rgb[1] << 8) | rgb[2]; },
luminosity: function () { // http://www.w3.org/TR/WCAG20/#relativeluminancedef var rgb = this.values.rgb; var lum = []; for (var i = 0; i < rgb.length; i++) { var chan = rgb[i] / 255; lum[i] = (chan <= 0.03928) ? chan / 12.92 : Math.pow(((chan + 0.055) / 1.055), 2.4); } return 0.2126 * lum[0] + 0.7152 * lum[1] + 0.0722 * lum[2]; },
contrast: function (color2) { // http://www.w3.org/TR/WCAG20/#contrast-ratiodef var lum1 = this.luminosity(); var lum2 = color2.luminosity(); if (lum1 > lum2) { return (lum1 + 0.05) / (lum2 + 0.05); } return (lum2 + 0.05) / (lum1 + 0.05); },
level: function (color2) { var contrastRatio = this.contrast(color2); if (contrastRatio >= 7.1) { return 'AAA'; }
return (contrastRatio >= 4.5) ? 'AA' : ; },
dark: function () { // YIQ equation from http://24ways.org/2010/calculating-color-contrast var rgb = this.values.rgb; var yiq = (rgb[0] * 299 + rgb[1] * 587 + rgb[2] * 114) / 1000; return yiq < 128; },
light: function () { return !this.dark(); },
negate: function () { var rgb = []; for (var i = 0; i < 3; i++) { rgb[i] = 255 - this.values.rgb[i]; } this.setValues('rgb', rgb); return this; },
lighten: function (ratio) { var hsl = this.values.hsl; hsl[2] += hsl[2] * ratio; this.setValues('hsl', hsl); return this; },
darken: function (ratio) { var hsl = this.values.hsl; hsl[2] -= hsl[2] * ratio; this.setValues('hsl', hsl); return this; },
saturate: function (ratio) { var hsl = this.values.hsl; hsl[1] += hsl[1] * ratio; this.setValues('hsl', hsl); return this; },
desaturate: function (ratio) { var hsl = this.values.hsl; hsl[1] -= hsl[1] * ratio; this.setValues('hsl', hsl); return this; },
whiten: function (ratio) { var hwb = this.values.hwb; hwb[1] += hwb[1] * ratio; this.setValues('hwb', hwb); return this; },
blacken: function (ratio) { var hwb = this.values.hwb; hwb[2] += hwb[2] * ratio; this.setValues('hwb', hwb); return this; },
greyscale: function () { var rgb = this.values.rgb; // http://en.wikipedia.org/wiki/Grayscale#Converting_color_to_grayscale var val = rgb[0] * 0.3 + rgb[1] * 0.59 + rgb[2] * 0.11; this.setValues('rgb', [val, val, val]); return this; },
clearer: function (ratio) { var alpha = this.values.alpha; this.setValues('alpha', alpha - (alpha * ratio)); return this; },
opaquer: function (ratio) { var alpha = this.values.alpha; this.setValues('alpha', alpha + (alpha * ratio)); return this; },
rotate: function (degrees) { var hsl = this.values.hsl; var hue = (hsl[0] + degrees) % 360; hsl[0] = hue < 0 ? 360 + hue : hue; this.setValues('hsl', hsl); return this; },
/** * Ported from sass implementation in C * https://github.com/sass/libsass/blob/0e6b4a2850092356aa3ece07c6b249f0221caced/functions.cpp#L209 */ mix: function (mixinColor, weight) { var color1 = this; var color2 = mixinColor; var p = weight === undefined ? 0.5 : weight;
var w = 2 * p - 1; var a = color1.alpha() - color2.alpha();
var w1 = (((w * a === -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0; var w2 = 1 - w1;
return this .rgb( w1 * color1.red() + w2 * color2.red(), w1 * color1.green() + w2 * color2.green(), w1 * color1.blue() + w2 * color2.blue() ) .alpha(color1.alpha() * p + color2.alpha() * (1 - p)); },
toJSON: function () { return this.rgb(); },
clone: function () { // NOTE(SB): using node-clone creates a dependency to Buffer when using browserify, // making the final build way to big to embed in Chart.js. So let's do it manually, // assuming that values to clone are 1 dimension arrays containing only numbers, // except 'alpha' which is a number. var result = new Color(); var source = this.values; var target = result.values; var value, type;
for (var prop in source) { if (source.hasOwnProperty(prop)) { value = source[prop]; type = ({}).toString.call(value); if (type === '[object Array]') { target[prop] = value.slice(0); } else if (type === '[object Number]') { target[prop] = value; } else { console.error('unexpected color value:', value); } } }
return result; } };
Color.prototype.spaces = { rgb: ['red', 'green', 'blue'], hsl: ['hue', 'saturation', 'lightness'], hsv: ['hue', 'saturation', 'value'], hwb: ['hue', 'whiteness', 'blackness'], cmyk: ['cyan', 'magenta', 'yellow', 'black'] };
Color.prototype.maxes = { rgb: [255, 255, 255], hsl: [360, 100, 100], hsv: [360, 100, 100], hwb: [360, 100, 100], cmyk: [100, 100, 100, 100] };
Color.prototype.getValues = function (space) { var values = this.values; var vals = {};
for (var i = 0; i < space.length; i++) { vals[space.charAt(i)] = values[space][i]; }
if (values.alpha !== 1) { vals.a = values.alpha; }
// {r: 255, g: 255, b: 255, a: 0.4} return vals; };
Color.prototype.setValues = function (space, vals) { var values = this.values; var spaces = this.spaces; var maxes = this.maxes; var alpha = 1; var i;
this.valid = true;
if (space === 'alpha') { alpha = vals; } else if (vals.length) { // [10, 10, 10] values[space] = vals.slice(0, space.length); alpha = vals[space.length]; } else if (vals[space.charAt(0)] !== undefined) { // {r: 10, g: 10, b: 10} for (i = 0; i < space.length; i++) { values[space][i] = vals[space.charAt(i)]; }
alpha = vals.a; } else if (vals[spaces[space][0]] !== undefined) { // {red: 10, green: 10, blue: 10} var chans = spaces[space];
for (i = 0; i < space.length; i++) { values[space][i] = vals[chans[i]]; }
alpha = vals.alpha; }
values.alpha = Math.max(0, Math.min(1, (alpha === undefined ? values.alpha : alpha)));
if (space === 'alpha') { return false; }
var capped;
// cap values of the space prior converting all values for (i = 0; i < space.length; i++) { capped = Math.max(0, Math.min(maxes[space][i], values[space][i])); values[space][i] = Math.round(capped); }
// convert to all the other color spaces for (var sname in spaces) { if (sname !== space) { values[sname] = colorConvert[space][sname](values[space]); } }
return true; };
Color.prototype.setSpace = function (space, args) { var vals = args[0];
if (vals === undefined) { // color.rgb() return this.getValues(space); }
// color.rgb(10, 10, 10) if (typeof vals === 'number') { vals = Array.prototype.slice.call(args); }
this.setValues(space, vals); return this; };
Color.prototype.setChannel = function (space, index, val) { var svalues = this.values[space]; if (val === undefined) { // color.red() return svalues[index]; } else if (val === svalues[index]) { // color.red(color.red()) return this; }
// color.red(100) svalues[index] = val; this.setValues(space, svalues);
return this; };
if (typeof window !== 'undefined') { window.Color = Color; }
var chartjsColor = Color;
/**
* @namespace Chart.helpers */
var helpers = { /** * An empty function that can be used, for example, for optional callback. */ noop: function() {},
/** * Returns a unique id, sequentially generated from a global variable. * @returns {number} * @function */ uid: (function() { var id = 0; return function() { return id++; }; }()),
/** * Returns true if `value` is neither null nor undefined, else returns false. * @param {*} value - The value to test. * @returns {boolean} * @since 2.7.0 */ isNullOrUndef: function(value) { return value === null || typeof value === 'undefined'; },
/** * Returns true if `value` is an array (including typed arrays), else returns false. * @param {*} value - The value to test. * @returns {boolean} * @function */ isArray: function(value) { if (Array.isArray && Array.isArray(value)) { return true; } var type = Object.prototype.toString.call(value); if (type.substr(0, 7) === '[object' && type.substr(-6) === 'Array]') { return true; } return false; },
/** * Returns true if `value` is an object (excluding null), else returns false. * @param {*} value - The value to test. * @returns {boolean} * @since 2.7.0 */ isObject: function(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. * @returns {boolean} */ isFinite: function(value) { return (typeof value === 'number' || value instanceof Number) && isFinite(value); },
/** * 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. * @returns {*} */ valueOrDefault: function(value, defaultValue) { return typeof value === 'undefined' ? defaultValue : value; },
/** * Returns value at the given `index` in array if defined, else returns `defaultValue`. * @param {Array} value - The array to lookup for value at `index`. * @param {number} index - The index in `value` to lookup for value. * @param {*} defaultValue - The value to return if `value[index]` is undefined. * @returns {*} */ valueAtIndexOrDefault: function(value, index, defaultValue) { return helpers.valueOrDefault(helpers.isArray(value) ? value[index] : value, defaultValue); },
/** * 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 {function} fn - The function to call. * @param {Array|undefined|null} args - The arguments with which `fn` should be called. * @param {object} [thisArg] - The value of `this` provided for the call to `fn`. * @returns {*} */ callback: function(fn, args, thisArg) { if (fn && typeof fn.call === 'function') { return fn.apply(thisArg, args); } },
/** * Note(SB) for performance sake, this method should only be used when loopable type * is unknown or in none intensive code (not called often and small loopable). Else * it's preferable to use a regular for() loop and save extra function calls. * @param {object|Array} loopable - The object or array to be iterated. * @param {function} fn - The function to call for each item. * @param {object} [thisArg] - The value of `this` provided for the call to `fn`. * @param {boolean} [reverse] - If true, iterates backward on the loopable. */ each: function(loopable, fn, thisArg, reverse) { var i, len, keys; if (helpers.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 (helpers.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. * @see https://stackoverflow.com/a/14853974 * @param {Array} a0 - The array to compare * @param {Array} a1 - The array to compare * @returns {boolean} */ arrayEquals: function(a0, a1) { var 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 instanceof Array && v1 instanceof Array) { if (!helpers.arrayEquals(v0, v1)) { return false; } } else if (v0 !== v1) { // NOTE: two different object instances will never be equal: {x:20} != {x:20} return false; } }
return true; },
/** * Returns a deep copy of `source` without keeping references on objects and arrays. * @param {*} source - The value to clone. * @returns {*} */ clone: function(source) { if (helpers.isArray(source)) { return source.map(helpers.clone); }
if (helpers.isObject(source)) { var target = {}; var keys = Object.keys(source); var klen = keys.length; var k = 0;
for (; k < klen; ++k) { target[keys[k]] = helpers.clone(source[keys[k]]); }
return target; }
return source; },
/** * The default merger when Chart.helpers.merge is called without merger option. * Note(SB): also used by mergeConfig and mergeScaleConfig as fallback. * @private */ _merger: function(key, target, source, options) { var tval = target[key]; var sval = source[key];
if (helpers.isObject(tval) && helpers.isObject(sval)) { helpers.merge(tval, sval, options); } else { target[key] = helpers.clone(sval); } },
/** * Merges source[key] in target[key] only if target[key] is undefined. * @private */ _mergerIf: function(key, target, source) { var tval = target[key]; var sval = source[key];
if (helpers.isObject(tval) && helpers.isObject(sval)) { helpers.mergeIf(tval, sval); } else if (!target.hasOwnProperty(key)) { target[key] = helpers.clone(sval); } },
/** * Recursively deep copies `source` properties into `target` with the given `options`. * IMPORTANT: `target` is not cloned and will be updated with `source` properties. * @param {object} target - The target object in which all sources are merged into. * @param {object|object[]} source - Object(s) to merge into `target`. * @param {object} [options] - Merging options: * @param {function} [options.merger] - The merge method (key, target, source, options) * @returns {object} The `target` object. */ merge: function(target, source, options) { var sources = helpers.isArray(source) ? source : [source]; var ilen = sources.length; var merge, i, keys, klen, k;
if (!helpers.isObject(target)) { return target; }
options = options || {}; merge = options.merger || helpers._merger;
for (i = 0; i < ilen; ++i) { source = sources[i]; if (!helpers.isObject(source)) { continue; }
keys = Object.keys(source); for (k = 0, klen = keys.length; k < klen; ++k) { merge(keys[k], target, source, options); } }
return target; },
/** * Recursively deep copies `source` properties into `target` *only* if not defined in target. * IMPORTANT: `target` is not cloned and will be updated with `source` properties. * @param {object} target - The target object in which all sources are merged into. * @param {object|object[]} source - Object(s) to merge into `target`. * @returns {object} The `target` object. */ mergeIf: function(target, source) { return helpers.merge(target, source, {merger: helpers._mergerIf}); },
/** * Applies the contents of two or more objects together into the first object. * @param {object} target - The target object in which all objects are merged into. * @param {object} arg1 - Object containing additional properties to merge in target. * @param {object} argN - Additional objects containing properties to merge in target. * @returns {object} The `target` object. */ extend: function(target) { var setFn = function(value, key) { target[key] = value; }; for (var i = 1, ilen = arguments.length; i < ilen; ++i) { helpers.each(arguments[i], setFn); } return target; },
/** * Basic javascript inheritance based on the model created in Backbone.js */ inherits: function(extensions) { var me = this; var ChartElement = (extensions && extensions.hasOwnProperty('constructor')) ? extensions.constructor : function() { return me.apply(this, arguments); };
var Surrogate = function() { this.constructor = ChartElement; };
Surrogate.prototype = me.prototype; ChartElement.prototype = new Surrogate(); ChartElement.extend = helpers.inherits;
if (extensions) { helpers.extend(ChartElement.prototype, extensions); }
ChartElement.__super__ = me.prototype; return ChartElement; } };
var helpers_core = helpers;
// DEPRECATIONS
/**
* Provided for backward compatibility, use Chart.helpers.callback instead. * @function Chart.helpers.callCallback * @deprecated since version 2.6.0 * @todo remove at version 3 * @private */
helpers.callCallback = helpers.callback;
/**
* Provided for backward compatibility, use Array.prototype.indexOf instead. * Array.prototype.indexOf compatibility: Chrome, Opera, Safari, FF1.5+, IE9+ * @function Chart.helpers.indexOf * @deprecated since version 2.7.0 * @todo remove at version 3 * @private */
helpers.indexOf = function(array, item, fromIndex) { return Array.prototype.indexOf.call(array, item, fromIndex); };
/**
* Provided for backward compatibility, use Chart.helpers.valueOrDefault instead. * @function Chart.helpers.getValueOrDefault * @deprecated since version 2.7.0 * @todo remove at version 3 * @private */
helpers.getValueOrDefault = helpers.valueOrDefault;
/**
* Provided for backward compatibility, use Chart.helpers.valueAtIndexOrDefault instead. * @function Chart.helpers.getValueAtIndexOrDefault * @deprecated since version 2.7.0 * @todo remove at version 3 * @private */
helpers.getValueAtIndexOrDefault = helpers.valueAtIndexOrDefault;
/**
* Easing functions adapted from Robert Penner's easing equations. * @namespace Chart.helpers.easingEffects * @see http://www.robertpenner.com/easing/ */
var effects = { linear: function(t) { return t; },
easeInQuad: function(t) { return t * t; },
easeOutQuad: function(t) { return -t * (t - 2); },
easeInOutQuad: function(t) { if ((t /= 0.5) < 1) { return 0.5 * t * t; } return -0.5 * ((--t) * (t - 2) - 1); },
easeInCubic: function(t) { return t * t * t; },
easeOutCubic: function(t) { return (t = t - 1) * t * t + 1; },
easeInOutCubic: function(t) { if ((t /= 0.5) < 1) { return 0.5 * t * t * t; } return 0.5 * ((t -= 2) * t * t + 2); },
easeInQuart: function(t) { return t * t * t * t; },
easeOutQuart: function(t) { return -((t = t - 1) * t * t * t - 1); },
easeInOutQuart: function(t) { if ((t /= 0.5) < 1) { return 0.5 * t * t * t * t; } return -0.5 * ((t -= 2) * t * t * t - 2); },
easeInQuint: function(t) { return t * t * t * t * t; },
easeOutQuint: function(t) { return (t = t - 1) * t * t * t * t + 1; },
easeInOutQuint: function(t) { if ((t /= 0.5) < 1) { return 0.5 * t * t * t * t * t; } return 0.5 * ((t -= 2) * t * t * t * t + 2); },
easeInSine: function(t) { return -Math.cos(t * (Math.PI / 2)) + 1; },
easeOutSine: function(t) { return Math.sin(t * (Math.PI / 2)); },
easeInOutSine: function(t) { return -0.5 * (Math.cos(Math.PI * t) - 1); },
easeInExpo: function(t) { return (t === 0) ? 0 : Math.pow(2, 10 * (t - 1)); },
easeOutExpo: function(t) { return (t === 1) ? 1 : -Math.pow(2, -10 * t) + 1; },
easeInOutExpo: function(t) { if (t === 0) { return 0; } if (t === 1) { return 1; } if ((t /= 0.5) < 1) { return 0.5 * Math.pow(2, 10 * (t - 1)); } return 0.5 * (-Math.pow(2, -10 * --t) + 2); },
easeInCirc: function(t) { if (t >= 1) { return t; } return -(Math.sqrt(1 - t * t) - 1); },
easeOutCirc: function(t) { return Math.sqrt(1 - (t = t - 1) * t); },
easeInOutCirc: function(t) { if ((t /= 0.5) < 1) { return -0.5 * (Math.sqrt(1 - t * t) - 1); } return 0.5 * (Math.sqrt(1 - (t -= 2) * t) + 1); },
easeInElastic: function(t) { var s = 1.70158; var p = 0; var a = 1; if (t === 0) { return 0; } if (t === 1) { return 1; } if (!p) { p = 0.3; } if (a < 1) { a = 1; s = p / 4; } else { s = p / (2 * Math.PI) * Math.asin(1 / a); } return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t - s) * (2 * Math.PI) / p)); },
easeOutElastic: function(t) { var s = 1.70158; var p = 0; var a = 1; if (t === 0) { return 0; } if (t === 1) { return 1; } if (!p) { p = 0.3; } if (a < 1) { a = 1; s = p / 4; } else { s = p / (2 * Math.PI) * Math.asin(1 / a); } return a * Math.pow(2, -10 * t) * Math.sin((t - s) * (2 * Math.PI) / p) + 1; },
easeInOutElastic: function(t) { var s = 1.70158; var p = 0; var a = 1; if (t === 0) { return 0; } if ((t /= 0.5) === 2) { return 1; } if (!p) { p = 0.45; } if (a < 1) { a = 1; s = p / 4; } else { s = p / (2 * Math.PI) * Math.asin(1 / a); } if (t < 1) { return -0.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t - s) * (2 * Math.PI) / p)); } return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t - s) * (2 * Math.PI) / p) * 0.5 + 1; }, easeInBack: function(t) { var s = 1.70158; return t * t * ((s + 1) * t - s); },
easeOutBack: function(t) { var s = 1.70158; return (t = t - 1) * t * ((s + 1) * t + s) + 1; },
easeInOutBack: function(t) { var 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: function(t) { return 1 - effects.easeOutBounce(1 - t); },
easeOutBounce: function(t) { if (t < (1 / 2.75)) { return 7.5625 * t * t; } if (t < (2 / 2.75)) { return 7.5625 * (t -= (1.5 / 2.75)) * t + 0.75; } if (t < (2.5 / 2.75)) { return 7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375; } return 7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375; },
easeInOutBounce: function(t) { if (t < 0.5) { return effects.easeInBounce(t * 2) * 0.5; } return effects.easeOutBounce(t * 2 - 1) * 0.5 + 0.5; } };
var helpers_easing = { effects: effects };
// DEPRECATIONS
/**
* Provided for backward compatibility, use Chart.helpers.easing.effects instead. * @function Chart.helpers.easingEffects * @deprecated since version 2.7.0 * @todo remove at version 3 * @private */
helpers_core.easingEffects = effects;
var PI = Math.PI; var RAD_PER_DEG = PI / 180; var DOUBLE_PI = PI * 2; var HALF_PI = PI / 2; var QUARTER_PI = PI / 4; var TWO_THIRDS_PI = PI * 2 / 3;
/**
* @namespace Chart.helpers.canvas */
var exports$1 = { /** * Clears the entire canvas associated to the given `chart`. * @param {Chart} chart - The chart for which to clear the canvas. */ clear: function(chart) { chart.ctx.clearRect(0, 0, chart.width, chart.height); },
/** * Creates a "path" for a rectangle with rounded corners at position (x, y) with a * given size (width, height) and the same `radius` for all corners. * @param {CanvasRenderingContext2D} ctx - The canvas 2D Context. * @param {number} x - The x axis of the coordinate for the rectangle starting point. * @param {number} y - The y axis of the coordinate for the rectangle starting point. * @param {number} width - The rectangle's width. * @param {number} height - The rectangle's height. * @param {number} radius - The rounded amount (in pixels) for the four corners. * @todo handle `radius` as top-left, top-right, bottom-right, bottom-left array/object? */ roundedRect: function(ctx, x, y, width, height, radius) { if (radius) { var r = Math.min(radius, height / 2, width / 2); var left = x + r; var top = y + r; var right = x + width - r; var bottom = y + height - r;
ctx.moveTo(x, top); if (left < right && top < bottom) { ctx.arc(left, top, r, -PI, -HALF_PI); ctx.arc(right, top, r, -HALF_PI, 0); ctx.arc(right, bottom, r, 0, HALF_PI); ctx.arc(left, bottom, r, HALF_PI, PI); } else if (left < right) { ctx.moveTo(left, y); ctx.arc(right, top, r, -HALF_PI, HALF_PI); ctx.arc(left, top, r, HALF_PI, PI + HALF_PI); } else if (top < bottom) { ctx.arc(left, top, r, -PI, 0); ctx.arc(left, bottom, r, 0, PI); } else { ctx.arc(left, top, r, -PI, PI); } ctx.closePath(); ctx.moveTo(x, y); } else { ctx.rect(x, y, width, height); } },
drawPoint: function(ctx, style, radius, x, y, rotation) { var type, xOffset, yOffset, size, cornerRadius; var rad = (rotation || 0) * RAD_PER_DEG;
if (style && typeof style === 'object') { type = style.toString(); if (type === '[object HTMLImageElement]' || type === '[object HTMLCanvasElement]') { ctx.drawImage(style, x - style.width / 2, y - style.height / 2, style.width, style.height); return; } }
if (isNaN(radius) || radius <= 0) { return; }
ctx.beginPath();
switch (style) { // Default includes circle default: ctx.arc(x, y, radius, 0, DOUBLE_PI); ctx.closePath(); break; case 'triangle': ctx.moveTo(x + Math.sin(rad) * radius, y - Math.cos(rad) * radius); rad += TWO_THIRDS_PI; ctx.lineTo(x + Math.sin(rad) * radius, y - Math.cos(rad) * radius); rad += TWO_THIRDS_PI; ctx.lineTo(x + Math.sin(rad) * radius, 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; yOffset = Math.sin(rad + QUARTER_PI) * size; ctx.arc(x - xOffset, y - yOffset, cornerRadius, rad - PI, rad - HALF_PI); ctx.arc(x + yOffset, y - xOffset, cornerRadius, rad - HALF_PI, rad); ctx.arc(x + xOffset, y + yOffset, cornerRadius, rad, rad + HALF_PI); ctx.arc(x - yOffset, y + xOffset, cornerRadius, rad + HALF_PI, rad + PI); ctx.closePath(); break; case 'rect': if (!rotation) { size = Math.SQRT1_2 * radius; ctx.rect(x - size, y - size, 2 * size, 2 * size); break; } rad += QUARTER_PI; /* falls through */ case 'rectRot': xOffset = Math.cos(rad) * radius; yOffset = Math.sin(rad) * radius; ctx.moveTo(x - xOffset, y - yOffset); ctx.lineTo(x + yOffset, y - xOffset); ctx.lineTo(x + xOffset, y + yOffset); ctx.lineTo(x - yOffset, y + xOffset); ctx.closePath(); break; case 'crossRot': rad += QUARTER_PI; /* falls through */ case 'cross': xOffset = Math.cos(rad) * radius; yOffset = Math.sin(rad) * radius; ctx.moveTo(x - xOffset, y - yOffset); ctx.lineTo(x + xOffset, y + yOffset); ctx.moveTo(x + yOffset, y - xOffset); ctx.lineTo(x - yOffset, y + xOffset); break; case 'star': xOffset = Math.cos(rad) * radius; yOffset = Math.sin(rad) * radius; ctx.moveTo(x - xOffset, y - yOffset); ctx.lineTo(x + xOffset, y + yOffset); ctx.moveTo(x + yOffset, y - xOffset); ctx.lineTo(x - yOffset, y + xOffset); rad += QUARTER_PI; xOffset = Math.cos(rad) * radius; yOffset = Math.sin(rad) * radius; ctx.moveTo(x - xOffset, y - yOffset); ctx.lineTo(x + xOffset, y + yOffset); ctx.moveTo(x + yOffset, y - xOffset); ctx.lineTo(x - yOffset, y + xOffset); break; case 'line': xOffset = 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) * radius, y + Math.sin(rad) * radius); break; }
ctx.fill(); ctx.stroke(); },
/** * Returns true if the point is inside the rectangle * @param {object} point - The point to test * @param {object} area - The rectangle * @returns {boolean} * @private */ _isPointInArea: function(point, area) { var epsilon = 1e-6; // 1e-6 is margin in pixels for accumulated error.
return point.x > area.left - epsilon && point.x < area.right + epsilon && point.y > area.top - epsilon && point.y < area.bottom + epsilon; },
clipArea: function(ctx, area) { ctx.save(); ctx.beginPath(); ctx.rect(area.left, area.top, area.right - area.left, area.bottom - area.top); ctx.clip(); },
unclipArea: function(ctx) { ctx.restore(); },
lineTo: function(ctx, previous, target, flip) { var stepped = target.steppedLine; if (stepped) { if (stepped === 'middle') { var midpoint = (previous.x + target.x) / 2.0; ctx.lineTo(midpoint, flip ? target.y : previous.y); ctx.lineTo(midpoint, flip ? previous.y : target.y); } else if ((stepped === 'after' && !flip) || (stepped !== 'after' && flip)) { ctx.lineTo(previous.x, target.y); } else { ctx.lineTo(target.x, previous.y); } ctx.lineTo(target.x, target.y); return; }
if (!target.tension) { ctx.lineTo(target.x, target.y); return; }
ctx.bezierCurveTo( flip ? previous.controlPointPreviousX : previous.controlPointNextX, flip ? previous.controlPointPreviousY : previous.controlPointNextY, flip ? target.controlPointNextX : target.controlPointPreviousX, flip ? target.controlPointNextY : target.controlPointPreviousY, target.x, target.y); } };
var helpers_canvas = exports$1;
// DEPRECATIONS
/**
* Provided for backward compatibility, use Chart.helpers.canvas.clear instead. * @namespace Chart.helpers.clear * @deprecated since version 2.7.0 * @todo remove at version 3 * @private */
helpers_core.clear = exports$1.clear;
/**
* Provided for backward compatibility, use Chart.helpers.canvas.roundedRect instead. * @namespace Chart.helpers.drawRoundedRectangle * @deprecated since version 2.7.0 * @todo remove at version 3 * @private */
helpers_core.drawRoundedRectangle = function(ctx) { ctx.beginPath(); exports$1.roundedRect.apply(exports$1, arguments); };
var defaults = { /** * @private */ _set: function(scope, values) { return helpers_core.merge(this[scope] || (this[scope] = {}), values); } };
defaults._set('global', { defaultColor: 'rgba(0,0,0,0.1)', defaultFontColor: '#666', defaultFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif", defaultFontSize: 12, defaultFontStyle: 'normal', defaultLineHeight: 1.2, showLines: true });
var core_defaults = defaults;
var valueOrDefault = helpers_core.valueOrDefault;
/**
* Converts the given font object into a CSS font string.
* @param {object} font - A font object.
* @return {string} The CSS font string. See https://developer.mozilla.org/en-US/docs/Web/CSS/font
* @private
*/
function toFontString(font) { if (!font || helpers_core.isNullOrUndef(font.size) || helpers_core.isNullOrUndef(font.family)) { return null; }
return (font.style ? font.style + ' ' : ) + (font.weight ? font.weight + ' ' : ) + font.size + 'px ' + font.family; }
/**
* @alias Chart.helpers.options * @namespace */
var helpers_options = { /** * Converts the given line height `value` in pixels for a specific font `size`. * @param {number|string} value - The lineHeight to parse (eg. 1.6, '14px', '75%', '1.6em'). * @param {number} size - The font size (in pixels) used to resolve relative `value`. * @returns {number} The effective line height in pixels (size * 1.2 if value is invalid). * @see https://developer.mozilla.org/en-US/docs/Web/CSS/line-height * @since 2.7.0 */ toLineHeight: function(value, size) { var matches = ( + value).match(/^(normal|(\d+(?:\.\d+)?)(px|em|%)?)$/); if (!matches || matches[1] === 'normal') { return size * 1.2; }
value = +matches[2];
switch (matches[3]) { case 'px': return value; case '%': value /= 100; break; default: break; }
return size * value; },
/** * Converts the given value into a padding object with pre-computed width/height. * @param {number|object} value - If a number, set the value to all TRBL component, * else, if and object, use defined properties and sets undefined ones to 0. * @returns {object} The padding values (top, right, bottom, left, width, height) * @since 2.7.0 */ toPadding: function(value) { var t, r, b, l;
if (helpers_core.isObject(value)) { t = +value.top || 0; r = +value.right || 0; b = +value.bottom || 0; l = +value.left || 0; } else { t = r = b = l = +value || 0; }
return { top: t, right: r, bottom: b, left: l, height: t + b, width: l + r }; },
/** * Parses font options and returns the font object. * @param {object} options - A object that contains font options to be parsed. * @return {object} The font object. * @todo Support font.* options and renamed to toFont(). * @private */ _parseFont: function(options) { var globalDefaults = core_defaults.global; var size = valueOrDefault(options.fontSize, globalDefaults.defaultFontSize); var font = { family: valueOrDefault(options.fontFamily, globalDefaults.defaultFontFamily), lineHeight: helpers_core.options.toLineHeight(valueOrDefault(options.lineHeight, globalDefaults.defaultLineHeight), size), size: size, style: valueOrDefault(options.fontStyle, globalDefaults.defaultFontStyle), weight: null, string: };
font.string = toFontString(font); return font; },
/** * Evaluates the given `inputs` sequentially and returns the first defined value. * @param {Array} inputs - An array of values, falling back to the last value. * @param {object} [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 {number} [index] - If defined and the current value is an array, the value * at `index` become the new input. * @since 2.7.0 */ resolve: function(inputs, context, index) { var 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); } if (index !== undefined && helpers_core.isArray(value)) { value = value[index]; } if (value !== undefined) { return value; } } } };
var helpers$1 = helpers_core; var easing = helpers_easing; var canvas = helpers_canvas; var options = helpers_options; helpers$1.easing = easing; helpers$1.canvas = canvas; helpers$1.options = options;
function interpolate(start, view, model, ease) { var keys = Object.keys(model); var i, ilen, key, actual, origin, target, type, c0, c1;
for (i = 0, ilen = keys.length; i < ilen; ++i) { key = keys[i];
target = model[key];
// if a value is added to the model after pivot() has been called, the view // doesn't contain it, so let's initialize the view to the target value. if (!view.hasOwnProperty(key)) { view[key] = target; }
actual = view[key];
if (actual === target || key[0] === '_') { continue; }
if (!start.hasOwnProperty(key)) { start[key] = actual; }
origin = start[key];
type = typeof target;
if (type === typeof origin) { if (type === 'string') { c0 = chartjsColor(origin); if (c0.valid) { c1 = chartjsColor(target); if (c1.valid) { view[key] = c1.mix(c0, ease).rgbString(); continue; } } } else if (helpers$1.isFinite(origin) && helpers$1.isFinite(target)) { view[key] = origin + (target - origin) * ease; continue; } }
view[key] = target; } }
var Element = function(configuration) { helpers$1.extend(this, configuration); this.initialize.apply(this, arguments); };
helpers$1.extend(Element.prototype, {
initialize: function() { this.hidden = false; },
pivot: function() { var me = this; if (!me._view) { me._view = helpers$1.clone(me._model); } me._start = {}; return me; },
transition: function(ease) { var me = this; var model = me._model; var start = me._start; var view = me._view;
// No animation -> No Transition if (!model || ease === 1) { me._view = model; me._start = null; return me; }
if (!view) { view = me._view = {}; }
if (!start) { start = me._start = {}; }
interpolate(start, view, model, ease);
return me; },
tooltipPosition: function() { return { x: this._model.x, y: this._model.y }; },
hasValue: function() { return helpers$1.isNumber(this._model.x) && helpers$1.isNumber(this._model.y); } });
Element.extend = helpers$1.inherits;
var core_element = Element;
var exports$2 = core_element.extend({ chart: null, // the animation associated chart instance currentStep: 0, // the current animation step numSteps: 60, // default number of steps easing: , // the easing to use for this animation render: null, // render function used by the animation service
onAnimationProgress: null, // user specified callback to fire on each step of the animation onAnimationComplete: null, // user specified callback to fire when the animation finishes });
var core_animation = exports$2;
// DEPRECATIONS
/**
* Provided for backward compatibility, use Chart.Animation instead * @prop Chart.Animation#animationObject * @deprecated since version 2.6.0 * @todo remove at version 3 */
Object.defineProperty(exports$2.prototype, 'animationObject', { get: function() { return this; } });
/**
* Provided for backward compatibility, use Chart.Animation#chart instead * @prop Chart.Animation#chartInstance * @deprecated since version 2.6.0 * @todo remove at version 3 */
Object.defineProperty(exports$2.prototype, 'chartInstance', { get: function() { return this.chart; }, set: function(value) { this.chart = value; } });
core_defaults._set('global', { animation: { duration: 1000, easing: 'easeOutQuart', onProgress: helpers$1.noop, onComplete: helpers$1.noop } });
var core_animations = { animations: [], request: null,
/** * @param {Chart} chart - The chart to animate. * @param {Chart.Animation} animation - The animation that we will animate. * @param {number} duration - The animation duration in ms. * @param {boolean} lazy - if true, the chart is not marked as animating to enable more responsive interactions */ addAnimation: function(chart, animation, duration, lazy) { var animations = this.animations; var i, ilen;
animation.chart = chart; animation.startTime = Date.now(); animation.duration = duration;
if (!lazy) { chart.animating = true; }
for (i = 0, ilen = animations.length; i < ilen; ++i) { if (animations[i].chart === chart) { animations[i] = animation; return; } }
animations.push(animation);
// If there are no animations queued, manually kickstart a digest, for lack of a better word if (animations.length === 1) { this.requestAnimationFrame(); } },
cancelAnimation: function(chart) { var index = helpers$1.findIndex(this.animations, function(animation) { return animation.chart === chart; });
if (index !== -1) { this.animations.splice(index, 1); chart.animating = false; } },
requestAnimationFrame: function() { var me = this; if (me.request === null) { // Skip animation frame requests until the active one is executed. // This can happen when processing mouse events, e.g. 'mousemove' // and 'mouseout' events will trigger multiple renders. me.request = helpers$1.requestAnimFrame.call(window, function() { me.request = null; me.startDigest(); }); } },
/** * @private */ startDigest: function() { var me = this;
me.advance();
// Do we have more stuff to animate? if (me.animations.length > 0) { me.requestAnimationFrame(); } },
/** * @private */ advance: function() { var animations = this.animations; var animation, chart, numSteps, nextStep; var i = 0;
// 1 animation per chart, so we are looping charts here while (i < animations.length) { animation = animations[i]; chart = animation.chart; numSteps = animation.numSteps;
// Make sure that currentStep starts at 1 // https://github.com/chartjs/Chart.js/issues/6104 nextStep = Math.floor((Date.now() - animation.startTime) / animation.duration * numSteps) + 1; animation.currentStep = Math.min(nextStep, numSteps);
helpers$1.callback(animation.render, [chart, animation], chart); helpers$1.callback(animation.onAnimationProgress, [animation], chart);
if (animation.currentStep >= numSteps) { helpers$1.callback(animation.onAnimationComplete, [animation], chart); chart.animating = false; animations.splice(i, 1); } else { ++i; } } } };
var resolve = helpers$1.options.resolve;
var arrayEvents = ['push', 'pop', 'shift', 'splice', 'unshift'];
/**
* Hooks the array methods that add or remove values ('push', pop', 'shift', 'splice',
* 'unshift') and notify the listener AFTER the array has been altered. Listeners are
* called on the 'onData*' callbacks (e.g. onDataPush, etc.) with same arguments.
*/
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(function(key) { var method = 'onData' + key.charAt(0).toUpperCase() + key.slice(1); var base = array[key];
Object.defineProperty(array, key, { configurable: true, enumerable: false, value: function() { var args = Array.prototype.slice.call(arguments); var res = base.apply(this, args);
helpers$1.each(array._chartjs.listeners, function(object) { if (typeof object[method] === 'function') { object[method].apply(object, args); } });
return res; } }); }); }
/**
* Removes the given array event listener and cleanup extra attached properties (such as * the _chartjs stub and overridden methods) if array doesn't have any more listeners. */
function unlistenArrayEvents(array, listener) { var stub = array._chartjs; if (!stub) { return; }
var listeners = stub.listeners; var index = listeners.indexOf(listener); if (index !== -1) { listeners.splice(index, 1); }
if (listeners.length > 0) { return; }
arrayEvents.forEach(function(key) { delete array[key]; });
delete array._chartjs; }
// Base class for all dataset controllers (line, bar, etc) var DatasetController = function(chart, datasetIndex) { this.initialize(chart, datasetIndex); };
helpers$1.extend(DatasetController.prototype, {
/** * Element type used to generate a meta dataset (e.g. Chart.element.Line). * @type {Chart.core.element} */ datasetElementType: null,
/** * Element type used to generate a meta data (e.g. Chart.element.Point). * @type {Chart.core.element} */ dataElementType: null,
initialize: function(chart, datasetIndex) { var me = this; me.chart = chart; me.index = datasetIndex; me.linkScales(); me.addElements(); },
updateIndex: function(datasetIndex) { this.index = datasetIndex; },
linkScales: function() { var me = this; var meta = me.getMeta(); var dataset = me.getDataset();
if (meta.xAxisID === null || !(meta.xAxisID in me.chart.scales)) { meta.xAxisID = dataset.xAxisID || me.chart.options.scales.xAxes[0].id; } if (meta.yAxisID === null || !(meta.yAxisID in me.chart.scales)) { meta.yAxisID = dataset.yAxisID || me.chart.options.scales.yAxes[0].id; } },
getDataset: function() { return this.chart.data.datasets[this.index]; },
getMeta: function() { return this.chart.getDatasetMeta(this.index); },
getScaleForId: function(scaleID) { return this.chart.scales[scaleID]; },
/** * @private */ _getValueScaleId: function() { return this.getMeta().yAxisID; },
/** * @private */ _getIndexScaleId: function() { return this.getMeta().xAxisID; },
/** * @private */ _getValueScale: function() { return this.getScaleForId(this._getValueScaleId()); },
/** * @private */ _getIndexScale: function() { return this.getScaleForId(this._getIndexScaleId()); },
reset: function() { this.update(true); },
/** * @private */ destroy: function() { if (this._data) { unlistenArrayEvents(this._data, this); } },
createMetaDataset: function() { var me = this; var type = me.datasetElementType; return type && new type({ _chart: me.chart, _datasetIndex: me.index }); },
createMetaData: function(index) { var me = this; var type = me.dataElementType; return type && new type({ _chart: me.chart, _datasetIndex: me.index, _index: index }); },
addElements: function() { var me = this; var meta = me.getMeta(); var data = me.getDataset().data || []; var metaData = meta.data; var i, ilen;
for (i = 0, ilen = data.length; i < ilen; ++i) { metaData[i] = metaData[i] || me.createMetaData(i); }
meta.dataset = meta.dataset || me.createMetaDataset(); },
addElementAndReset: function(index) { var element = this.createMetaData(index); this.getMeta().data.splice(index, 0, element); this.updateElement(element, index, true); },
buildOrUpdateElements: function() { var me = this; var dataset = me.getDataset(); var data = dataset.data || (dataset.data = []);
// In order to correctly handle data addition/deletion animation (an thus simulate // real-time charts), we need to monitor these data modifications and synchronize // the internal meta data accordingly. if (me._data !== data) { if (me._data) { // This case happens when the user replaced the data array instance. unlistenArrayEvents(me._data, me); }
if (data && Object.isExtensible(data)) { listenArrayEvents(data, me); } me._data = data; }
// Re-sync meta data in case the user replaced the data array or if we missed // any updates and so make sure that we handle number of datapoints changing. me.resyncElements(); },
update: helpers$1.noop,
transition: function(easingValue) { var meta = this.getMeta(); var elements = meta.data || []; var ilen = elements.length; var i = 0;
for (; i < ilen; ++i) { elements[i].transition(easingValue); }
if (meta.dataset) { meta.dataset.transition(easingValue); } },
draw: function() { var meta = this.getMeta(); var elements = meta.data || []; var ilen = elements.length; var i = 0;
if (meta.dataset) { meta.dataset.draw(); }
for (; i < ilen; ++i) { elements[i].draw(); } },
removeHoverStyle: function(element) { helpers$1.merge(element._model, element.$previousStyle || {}); delete element.$previousStyle; },
setHoverStyle: function(element) { var dataset = this.chart.data.datasets[element._datasetIndex]; var index = element._index; var custom = element.custom || {}; var model = element._model; var getHoverColor = helpers$1.getHoverColor;
element.$previousStyle = { backgroundColor: model.backgroundColor, borderColor: model.borderColor, borderWidth: model.borderWidth };
model.backgroundColor = resolve([custom.hoverBackgroundColor, dataset.hoverBackgroundColor, getHoverColor(model.backgroundColor)], undefined, index); model.borderColor = resolve([custom.hoverBorderColor, dataset.hoverBorderColor, getHoverColor(model.borderColor)], undefined, index); model.borderWidth = resolve([custom.hoverBorderWidth, dataset.hoverBorderWidth, model.borderWidth], undefined, index); },
/** * @private */ resyncElements: function() { var me = this; var meta = me.getMeta(); var data = me.getDataset().data; var numMeta = meta.data.length; var numData = data.length;
if (numData < numMeta) { meta.data.splice(numData, numMeta - numData); } else if (numData > numMeta) { me.insertElements(numMeta, numData - numMeta); } },
/** * @private */ insertElements: function(start, count) { for (var i = 0; i < count; ++i) { this.addElementAndReset(start + i); } },
/** * @private */ onDataPush: function() { var count = arguments.length; this.insertElements(this.getDataset().data.length - count, count); },
/** * @private */ onDataPop: function() { this.getMeta().data.pop(); },
/** * @private */ onDataShift: function() { this.getMeta().data.shift(); },
/** * @private */ onDataSplice: function(start, count) { this.getMeta().data.splice(start, count); this.insertElements(start, arguments.length - 2); },
/** * @private */ onDataUnshift: function() { this.insertElements(0, arguments.length); } });
DatasetController.extend = helpers$1.inherits;
var core_datasetController = DatasetController;
core_defaults._set('global', { elements: { arc: { backgroundColor: core_defaults.global.defaultColor, borderColor: '#fff', borderWidth: 2, borderAlign: 'center' } } });
var element_arc = core_element.extend({ inLabelRange: function(mouseX) { var vm = this._view;
if (vm) { return (Math.pow(mouseX - vm.x, 2) < Math.pow(vm.radius + vm.hoverRadius, 2)); } return false; },
inRange: function(chartX, chartY) { var vm = this._view;
if (vm) { var pointRelativePosition = helpers$1.getAngleFromPoint(vm, {x: chartX, y: chartY}); var angle = pointRelativePosition.angle; var distance = pointRelativePosition.distance;
// Sanitise angle range var startAngle = vm.startAngle; var endAngle = vm.endAngle; while (endAngle < startAngle) { endAngle += 2.0 * Math.PI; } while (angle > endAngle) { angle -= 2.0 * Math.PI; } while (angle < startAngle) { angle += 2.0 * Math.PI; }
// Check if within the range of the open/close angle var betweenAngles = (angle >= startAngle && angle <= endAngle); var withinRadius = (distance >= vm.innerRadius && distance <= vm.outerRadius);
return (betweenAngles && withinRadius); } return false; },
getCenterPoint: function() { var vm = this._view; var halfAngle = (vm.startAngle + vm.endAngle) / 2; var halfRadius = (vm.innerRadius + vm.outerRadius) / 2; return { x: vm.x + Math.cos(halfAngle) * halfRadius, y: vm.y + Math.sin(halfAngle) * halfRadius }; },
getArea: function() { var vm = this._view; return Math.PI * ((vm.endAngle - vm.startAngle) / (2 * Math.PI)) * (Math.pow(vm.outerRadius, 2) - Math.pow(vm.innerRadius, 2)); },
tooltipPosition: function() { var vm = this._view; var centreAngle = vm.startAngle + ((vm.endAngle - vm.startAngle) / 2); var rangeFromCentre = (vm.outerRadius - vm.innerRadius) / 2 + vm.innerRadius;
return { x: vm.x + (Math.cos(centreAngle) * rangeFromCentre), y: vm.y + (Math.sin(centreAngle) * rangeFromCentre) }; },
draw: function() { var ctx = this._chart.ctx; var vm = this._view; var sA = vm.startAngle; var eA = vm.endAngle; var pixelMargin = (vm.borderAlign === 'inner') ? 0.33 : 0; var angleMargin;
ctx.save();
ctx.beginPath(); ctx.arc(vm.x, vm.y, Math.max(vm.outerRadius - pixelMargin, 0), sA, eA); ctx.arc(vm.x, vm.y, vm.innerRadius, eA, sA, true); ctx.closePath();
ctx.fillStyle = vm.backgroundColor; ctx.fill();
if (vm.borderWidth) { if (vm.borderAlign === 'inner') { // Draw an inner border by cliping the arc and drawing a double-width border // Enlarge the clipping arc by 0.33 pixels to eliminate glitches between borders ctx.beginPath(); angleMargin = pixelMargin / vm.outerRadius; ctx.arc(vm.x, vm.y, vm.outerRadius, sA - angleMargin, eA + angleMargin); if (vm.innerRadius > pixelMargin) { angleMargin = pixelMargin / vm.innerRadius; ctx.arc(vm.x, vm.y, vm.innerRadius - pixelMargin, eA + angleMargin, sA - angleMargin, true); } else { ctx.arc(vm.x, vm.y, pixelMargin, eA + Math.PI / 2, sA - Math.PI / 2); } ctx.closePath(); ctx.clip();
ctx.beginPath(); ctx.arc(vm.x, vm.y, vm.outerRadius, sA, eA); ctx.arc(vm.x, vm.y, vm.innerRadius, eA, sA, true); ctx.closePath();
ctx.lineWidth = vm.borderWidth * 2; ctx.lineJoin = 'round'; } else { ctx.lineWidth = vm.borderWidth; ctx.lineJoin = 'bevel'; }
ctx.strokeStyle = vm.borderColor; ctx.stroke(); }
ctx.restore(); } });
var valueOrDefault$1 = helpers$1.valueOrDefault;
var defaultColor = core_defaults.global.defaultColor;
core_defaults._set('global', { elements: { line: { tension: 0.4, backgroundColor: defaultColor, borderWidth: 3, borderColor: defaultColor, borderCapStyle: 'butt', borderDash: [], borderDashOffset: 0.0, borderJoinStyle: 'miter', capBezierPoints: true, fill: true, // do we fill in the area between the line and its base axis } } });
var element_line = core_element.extend({ draw: function() { var me = this; var vm = me._view; var ctx = me._chart.ctx; var spanGaps = vm.spanGaps; var points = me._children.slice(); // clone array var globalDefaults = core_defaults.global; var globalOptionLineElements = globalDefaults.elements.line; var lastDrawnIndex = -1; var index, current, previous, currentVM;
// If we are looping, adding the first point again if (me._loop && points.length) { points.push(points[0]); }
ctx.save();
// Stroke Line Options ctx.lineCap = vm.borderCapStyle || globalOptionLineElements.borderCapStyle;
// IE 9 and 10 do not support line dash if (ctx.setLineDash) { ctx.setLineDash(vm.borderDash || globalOptionLineElements.borderDash); }
ctx.lineDashOffset = valueOrDefault$1(vm.borderDashOffset, globalOptionLineElements.borderDashOffset); ctx.lineJoin = vm.borderJoinStyle || globalOptionLineElements.borderJoinStyle; ctx.lineWidth = valueOrDefault$1(vm.borderWidth, globalOptionLineElements.borderWidth); ctx.strokeStyle = vm.borderColor || globalDefaults.defaultColor;
// Stroke Line ctx.beginPath(); lastDrawnIndex = -1;
for (index = 0; index < points.length; ++index) { current = points[index]; previous = helpers$1.previousItem(points, index); currentVM = current._view;
// First point moves to it's starting position no matter what if (index === 0) { if (!currentVM.skip) { ctx.moveTo(currentVM.x, currentVM.y); lastDrawnIndex = index; } } else { previous = lastDrawnIndex === -1 ? previous : points[lastDrawnIndex];
if (!currentVM.skip) { if ((lastDrawnIndex !== (index - 1) && !spanGaps) || lastDrawnIndex === -1) { // There was a gap and this is the first point after the gap ctx.moveTo(currentVM.x, currentVM.y); } else { // Line to next point helpers$1.canvas.lineTo(ctx, previous._view, current._view); } lastDrawnIndex = index; } } }
ctx.stroke(); ctx.restore(); } });
var valueOrDefault$2 = helpers$1.valueOrDefault;
var defaultColor$1 = core_defaults.global.defaultColor;
core_defaults._set('global', { elements: { point: { radius: 3, pointStyle: 'circle', backgroundColor: defaultColor$1, borderColor: defaultColor$1, borderWidth: 1, // Hover hitRadius: 1, hoverRadius: 4, hoverBorderWidth: 1 } } });
function xRange(mouseX) { var vm = this._view; return vm ? (Math.abs(mouseX - vm.x) < vm.radius + vm.hitRadius) : false; }
function yRange(mouseY) { var vm = this._view; return vm ? (Math.abs(mouseY - vm.y) < vm.radius + vm.hitRadius) : false; }
var element_point = core_element.extend({ inRange: function(mouseX, mouseY) { var vm = this._view; return vm ? ((Math.pow(mouseX - vm.x, 2) + Math.pow(mouseY - vm.y, 2)) < Math.pow(vm.hitRadius + vm.radius, 2)) : false; },
inLabelRange: xRange, inXRange: xRange, inYRange: yRange,
getCenterPoint: function() { var vm = this._view; return { x: vm.x, y: vm.y }; },
getArea: function() { return Math.PI * Math.pow(this._view.radius, 2); },
tooltipPosition: function() { var vm = this._view; return { x: vm.x, y: vm.y, padding: vm.radius + vm.borderWidth }; },
draw: function(chartArea) { var vm = this._view; var ctx = this._chart.ctx; var pointStyle = vm.pointStyle; var rotation = vm.rotation; var radius = vm.radius; var x = vm.x; var y = vm.y; var globalDefaults = core_defaults.global; var defaultColor = globalDefaults.defaultColor; // eslint-disable-line no-shadow
if (vm.skip) { return; }
// Clipping for Points. if (chartArea === undefined || helpers$1.canvas._isPointInArea(vm, chartArea)) { ctx.strokeStyle = vm.borderColor || defaultColor; ctx.lineWidth = valueOrDefault$2(vm.borderWidth, globalDefaults.elements.point.borderWidth); ctx.fillStyle = vm.backgroundColor || defaultColor; helpers$1.canvas.drawPoint(ctx, pointStyle, radius, x, y, rotation); } } });
var defaultColor$2 = core_defaults.global.defaultColor;
core_defaults._set('global', { elements: { rectangle: { backgroundColor: defaultColor$2, borderColor: defaultColor$2, borderSkipped: 'bottom', borderWidth: 0 } } });
function isVertical(vm) { return vm && vm.width !== undefined; }
/**
* Helper function to get the bounds of the bar regardless of the orientation
* @param bar {Chart.Element.Rectangle} the bar
* @return {Bounds} bounds of the bar
* @private
*/
function getBarBounds(vm) { var x1, x2, y1, y2, half;
if (isVertical(vm)) { half = vm.width / 2; x1 = vm.x - half; x2 = vm.x + half; y1 = Math.min(vm.y, vm.base); y2 = Math.max(vm.y, vm.base); } else { half = vm.height / 2; x1 = Math.min(vm.x, vm.base); x2 = Math.max(vm.x, vm.base); y1 = vm.y - half; y2 = vm.y + half; }
return { left: x1, top: y1, right: x2, bottom: y2 }; }
function swap(orig, v1, v2) { return orig === v1 ? v2 : orig === v2 ? v1 : orig; }
function parseBorderSkipped(vm) { var edge = vm.borderSkipped; var res = {};
if (!edge) { return res; }
if (vm.horizontal) { if (vm.base > vm.x) { edge = swap(edge, 'left', 'right'); } } else if (vm.base < vm.y) { edge = swap(edge, 'bottom', 'top'); }
res[edge] = true; return res; }
function parseBorderWidth(vm, maxW, maxH) { var value = vm.borderWidth; var skip = parseBorderSkipped(vm); var t, r, b, l;
if (helpers$1.isObject(value)) { t = +value.top || 0; r = +value.right || 0; b = +value.bottom || 0; l = +value.left || 0; } else { t = r = b = l = +value || 0; }
return { t: skip.top || (t < 0) ? 0 : t > maxH ? maxH : t, r: skip.right || (r < 0) ? 0 : r > maxW ? maxW : r, b: skip.bottom || (b < 0) ? 0 : b > maxH ? maxH : b, l: skip.left || (l < 0) ? 0 : l > maxW ? maxW : l }; }
function boundingRects(vm) { var bounds = getBarBounds(vm); var width = bounds.right - bounds.left; var height = bounds.bottom - bounds.top; var border = parseBorderWidth(vm, width / 2, height / 2);
return { outer: { x: bounds.left, y: bounds.top, w: width, h: height }, inner: { x: bounds.left + border.l, y: bounds.top + border.t, w: width - border.l - border.r, h: height - border.t - border.b } }; }
function inRange(vm, x, y) { var skipX = x === null; var skipY = y === null; var bounds = !vm || (skipX && skipY) ? false : getBarBounds(vm);
return bounds && (skipX || x >= bounds.left && x <= bounds.right) && (skipY || y >= bounds.top && y <= bounds.bottom); }
var element_rectangle = core_element.extend({ draw: function() { var ctx = this._chart.ctx; var vm = this._view; var rects = boundingRects(vm); var outer = rects.outer; var inner = rects.inner;
ctx.fillStyle = vm.backgroundColor; ctx.fillRect(outer.x, outer.y, outer.w, outer.h);
if (outer.w === inner.w && outer.h === inner.h) { return; }
ctx.save(); ctx.beginPath(); ctx.rect(outer.x, outer.y, outer.w, outer.h); ctx.clip(); ctx.fillStyle = vm.borderColor; ctx.rect(inner.x, inner.y, inner.w, inner.h); ctx.fill('evenodd'); ctx.restore(); },
height: function() { var vm = this._view; return vm.base - vm.y; },
inRange: function(mouseX, mouseY) { return inRange(this._view, mouseX, mouseY); },
inLabelRange: function(mouseX, mouseY) { var vm = this._view; return isVertical(vm) ? inRange(vm, mouseX, null) : inRange(vm, null, mouseY); },
inXRange: function(mouseX) { return inRange(this._view, mouseX, null); },
inYRange: function(mouseY) { return inRange(this._view, null, mouseY); },
getCenterPoint: function() { var vm = this._view; var x, y; if (isVertical(vm)) { x = vm.x; y = (vm.y + vm.base) / 2; } else { x = (vm.x + vm.base) / 2; y = vm.y; }
return {x: x, y: y}; },
getArea: function() { var vm = this._view;
return isVertical(vm) ? vm.width * Math.abs(vm.y - vm.base) : vm.height * Math.abs(vm.x - vm.base); },
tooltipPosition: function() { var vm = this._view; return { x: vm.x, y: vm.y }; } });
var elements = {}; var Arc = element_arc; var Line = element_line; var Point = element_point; var Rectangle = element_rectangle; elements.Arc = Arc; elements.Line = Line; elements.Point = Point; elements.Rectangle = Rectangle;
var resolve$1 = helpers$1.options.resolve;
core_defaults._set('bar', { hover: { mode: 'label' },
scales: { xAxes: [{ type: 'category', categoryPercentage: 0.8, barPercentage: 0.9, offset: true, gridLines: { offsetGridLines: true } }],
yAxes: [{ type: 'linear' }] } });
/**
* Computes the "optimal" sample size to maintain bars equally sized while preventing overlap. * @private */
function computeMinSampleSize(scale, pixels) { var min = scale.isHorizontal() ? scale.width : scale.height; var ticks = scale.getTicks(); var prev, curr, i, ilen;
for (i = 1, ilen = pixels.length; i < ilen; ++i) { min = Math.min(min, Math.abs(pixels[i] - pixels[i - 1])); }
for (i = 0, ilen = ticks.length; i < ilen; ++i) { curr = scale.getPixelForTick(i); min = i > 0 ? Math.min(min, curr - prev) : min; prev = curr; }
return min; }
/**
* Computes an "ideal" category based on the absolute bar thickness or, if undefined or null, * uses the smallest interval (see computeMinSampleSize) that prevents bar overlapping. This * mode currently always generates bars equally sized (until we introduce scriptable options?). * @private */
function computeFitCategoryTraits(index, ruler, options) { var thickness = options.barThickness; var count = ruler.stackCount; var curr = ruler.pixels[index]; var size, ratio;
if (helpers$1.isNullOrUndef(thickness)) { size = ruler.min * options.categoryPercentage; ratio = options.barPercentage; } else { // When bar thickness is enforced, category and bar percentages are ignored. // Note(SB): we could add support for relative bar thickness (e.g. barThickness: '50%') // and deprecate barPercentage since this value is ignored when thickness is absolute. size = thickness * count; ratio = 1; }
return { chunk: size / count, ratio: ratio, start: curr - (size / 2) }; }
/**
* Computes an "optimal" category that globally arranges bars side by side (no gap when * percentage options are 1), based on the previous and following categories. This mode * generates bars with different widths when data are not evenly spaced. * @private */
function computeFlexCategoryTraits(index, ruler, options) { var pixels = ruler.pixels; var curr = pixels[index]; var prev = index > 0 ? pixels[index - 1] : null; var next = index < pixels.length - 1 ? pixels[index + 1] : null; var percent = options.categoryPercentage; var start, size;
if (prev === null) { // first data: its size is double based on the next point or, // if it's also the last data, we use the scale size. prev = curr - (next === null ? ruler.end - ruler.start : next - curr); }
if (next === null) { // last data: its size is also double based on the previous point. next = curr + curr - prev; }
start = curr - (curr - Math.min(prev, next)) / 2 * percent; size = Math.abs(next - prev) / 2 * percent;
return { chunk: size / ruler.stackCount, ratio: options.barPercentage, start: start }; }
var controller_bar = core_datasetController.extend({
dataElementType: elements.Rectangle,
initialize: function() { var me = this; var meta;
core_datasetController.prototype.initialize.apply(me, arguments);
meta = me.getMeta(); meta.stack = me.getDataset().stack; meta.bar = true; },
update: function(reset) { var me = this; var rects = me.getMeta().data; var i, ilen;
me._ruler = me.getRuler();
for (i = 0, ilen = rects.length; i < ilen; ++i) { me.updateElement(rects[i], i, reset); } },
updateElement: function(rectangle, index, reset) { var me = this; var meta = me.getMeta(); var dataset = me.getDataset(); var options = me._resolveElementOptions(rectangle, index);
rectangle._xScale = me.getScaleForId(meta.xAxisID); rectangle._yScale = me.getScaleForId(meta.yAxisID); rectangle._datasetIndex = me.index; rectangle._index = index; rectangle._model = { backgroundColor: options.backgroundColor, borderColor: options.borderColor, borderSkipped: options.borderSkipped, borderWidth: options.borderWidth, datasetLabel: dataset.label, label: me.chart.data.labels[index] };
me._updateElementGeometry(rectangle, index, reset);
rectangle.pivot(); },
/** * @private */ _updateElementGeometry: function(rectangle, index, reset) { var me = this; var model = rectangle._model; var vscale = me._getValueScale(); var base = vscale.getBasePixel(); var horizontal = vscale.isHorizontal(); var ruler = me._ruler || me.getRuler(); var vpixels = me.calculateBarValuePixels(me.index, index); var ipixels = me.calculateBarIndexPixels(me.index, index, ruler);
model.horizontal = horizontal; model.base = reset ? base : vpixels.base; model.x = horizontal ? reset ? base : vpixels.head : ipixels.center; model.y = horizontal ? ipixels.center : reset ? base : vpixels.head; model.height = horizontal ? ipixels.size : undefined; model.width = horizontal ? undefined : ipixels.size; },
/** * Returns the stacks based on groups and bar visibility. * @param {number} [last] - The dataset index * @returns {string[]} The list of stack IDs * @private */ _getStacks: function(last) { var me = this; var chart = me.chart; var scale = me._getIndexScale(); var stacked = scale.options.stacked; var ilen = last === undefined ? chart.data.datasets.length : last + 1; var stacks = []; var i, meta;
for (i = 0; i < ilen; ++i) { meta = chart.getDatasetMeta(i); if (meta.bar && chart.isDatasetVisible(i) && (stacked === false || (stacked === true && stacks.indexOf(meta.stack) === -1) || (stacked === undefined && (meta.stack === undefined || stacks.indexOf(meta.stack) === -1)))) { stacks.push(meta.stack); } }
return stacks; },
/** * Returns the effective number of stacks based on groups and bar visibility. * @private */ getStackCount: function() { return this._getStacks().length; },
/** * Returns the stack index for the given dataset based on groups and bar visibility. * @param {number} [datasetIndex] - The dataset index * @param {string} [name] - The stack name to find * @returns {number} The stack index * @private */ getStackIndex: function(datasetIndex, name) { var stacks = this._getStacks(datasetIndex); var index = (name !== undefined) ? stacks.indexOf(name) : -1; // indexOf returns -1 if element is not present
return (index === -1) ? stacks.length - 1 : index; },
/** * @private */ getRuler: function() { var me = this; var scale = me._getIndexScale(); var stackCount = me.getStackCount(); var datasetIndex = me.index; var isHorizontal = scale.isHorizontal(); var start = isHorizontal ? scale.left : scale.top; var end = start + (isHorizontal ? scale.width : scale.height); var pixels = []; var i, ilen, min;
for (i = 0, ilen = me.getMeta().data.length; i < ilen; ++i) { pixels.push(scale.getPixelForValue(null, i, datasetIndex)); }
min = helpers$1.isNullOrUndef(scale.options.barThickness) ? computeMinSampleSize(scale, pixels) : -1;
return { min: min, pixels: pixels, start: start, end: end, stackCount: stackCount, scale: scale }; },
/** * Note: pixel values are not clamped to the scale area. * @private */ calculateBarValuePixels: function(datasetIndex, index) { var me = this; var chart = me.chart; var meta = me.getMeta(); var scale = me._getValueScale(); var isHorizontal = scale.isHorizontal(); var datasets = chart.data.datasets; var value = +scale.getRightValue(datasets[datasetIndex].data[index]); var minBarLength = scale.options.minBarLength; var stacked = scale.options.stacked; var stack = meta.stack; var start = 0; var i, imeta, ivalue, base, head, size;
if (stacked || (stacked === undefined && stack !== undefined)) { for (i = 0; i < datasetIndex; ++i) { imeta = chart.getDatasetMeta(i);
if (imeta.bar && imeta.stack === stack && imeta.controller._getValueScaleId() === scale.id && chart.isDatasetVisible(i)) {
ivalue = +scale.getRightValue(datasets[i].data[index]); if ((value < 0 && ivalue < 0) || (value >= 0 && ivalue > 0)) { start += ivalue; } } } }
base = scale.getPixelForValue(start); head = scale.getPixelForValue(start + value); size = head - base;
if (minBarLength !== undefined && Math.abs(size) < minBarLength) { size = minBarLength; if (value >= 0 && !isHorizontal || value < 0 && isHorizontal) { head = base - minBarLength; } else { head = base + minBarLength; } }
return { size: size, base: base, head: head, center: head + size / 2 }; },
/** * @private */ calculateBarIndexPixels: function(datasetIndex, index, ruler) { var me = this; var options = ruler.scale.options; var range = options.barThickness === 'flex' ? computeFlexCategoryTraits(index, ruler, options) : computeFitCategoryTraits(index, ruler, options);
var stackIndex = me.getStackIndex(datasetIndex, me.getMeta().stack); var center = range.start + (range.chunk * stackIndex) + (range.chunk / 2); var size = Math.min( helpers$1.valueOrDefault(options.maxBarThickness, Infinity), range.chunk * range.ratio);
return { base: center - size / 2, head: center + size / 2, center: center, size: size }; },
draw: function() { var me = this; var chart = me.chart; var scale = me._getValueScale(); var rects = me.getMeta().data; var dataset = me.getDataset(); var ilen = rects.length; var i = 0;
helpers$1.canvas.clipArea(chart.ctx, chart.chartArea);
for (; i < ilen; ++i) { if (!isNaN(scale.getRightValue(dataset.data[i]))) { rects[i].draw(); } }
helpers$1.canvas.unclipArea(chart.ctx); },
/** * @private */ _resolveElementOptions: function(rectangle, index) { var me = this; var chart = me.chart; var datasets = chart.data.datasets; var dataset = datasets[me.index]; var custom = rectangle.custom || {}; var options = chart.options.elements.rectangle; var values = {}; var i, ilen, key;
// Scriptable options var context = { chart: chart, dataIndex: index, dataset: dataset, datasetIndex: me.index };
var keys = [ 'backgroundColor', 'borderColor', 'borderSkipped', 'borderWidth' ];
for (i = 0, ilen = keys.length; i < ilen; ++i) { key = keys[i]; values[key] = resolve$1([ custom[key], dataset[key], options[key] ], context, index); }
return values; } });
var valueOrDefault$3 = helpers$1.valueOrDefault; var resolve$2 = helpers$1.options.resolve;
core_defaults._set('bubble', { hover: { mode: 'single' },
scales: { xAxes: [{ type: 'linear', // bubble should probably use a linear scale by default position: 'bottom', id: 'x-axis-0' // need an ID so datasets can reference the scale }], yAxes: [{ type: 'linear', position: 'left', id: 'y-axis-0' }] },
tooltips: { callbacks: { title: function() { // Title doesn't make sense for scatter since we format the data as a point return ; }, label: function(item, data) { var datasetLabel = data.datasets[item.datasetIndex].label || ; var dataPoint = data.datasets[item.datasetIndex].data[item.index]; return datasetLabel + ': (' + item.xLabel + ', ' + item.yLabel + ', ' + dataPoint.r + ')'; } } } });
var controller_bubble = core_datasetController.extend({ /** * @protected */ dataElementType: elements.Point,
/** * @protected */ update: function(reset) { var me = this; var meta = me.getMeta(); var points = meta.data;
// Update Points helpers$1.each(points, function(point, index) { me.updateElement(point, index, reset); }); },
/** * @protected */ updateElement: function(point, index, reset) { var me = this; var meta = me.getMeta(); var custom = point.custom || {}; var xScale = me.getScaleForId(meta.xAxisID); var yScale = me.getScaleForId(meta.yAxisID); var options = me._resolveElementOptions(point, index); var data = me.getDataset().data[index]; var dsIndex = me.index;
var x = reset ? xScale.getPixelForDecimal(0.5) : xScale.getPixelForValue(typeof data === 'object' ? data : NaN, index, dsIndex); var y = reset ? yScale.getBasePixel() : yScale.getPixelForValue(data, index, dsIndex);
point._xScale = xScale; point._yScale = yScale; point._options = options; point._datasetIndex = dsIndex; point._index = index; point._model = { backgroundColor: options.backgroundColor, borderColor: options.borderColor, borderWidth: options.borderWidth, hitRadius: options.hitRadius, pointStyle: options.pointStyle, rotation: options.rotation, radius: reset ? 0 : options.radius, skip: custom.skip || isNaN(x) || isNaN(y), x: x, y: y, };
point.pivot(); },
/** * @protected */ setHoverStyle: function(point) { var model = point._model; var options = point._options; var getHoverColor = helpers$1.getHoverColor;
point.$previousStyle = { backgroundColor: model.backgroundColor, borderColor: model.borderColor, borderWidth: model.borderWidth, radius: model.radius };
model.backgroundColor = valueOrDefault$3(options.hoverBackgroundColor, getHoverColor(options.backgroundColor)); model.borderColor = valueOrDefault$3(options.hoverBorderColor, getHoverColor(options.borderColor)); model.borderWidth = valueOrDefault$3(options.hoverBorderWidth, options.borderWidth); model.radius = options.radius + options.hoverRadius; },
/** * @private */ _resolveElementOptions: function(point, index) { var me = this; var chart = me.chart; var datasets = chart.data.datasets; var dataset = datasets[me.index]; var custom = point.custom || {}; var options = chart.options.elements.point; var data = dataset.data[index]; var values = {}; var i, ilen, key;
// Scriptable options var context = { chart: chart, dataIndex: index, dataset: dataset, datasetIndex: me.index };
var keys = [ 'backgroundColor', 'borderColor', 'borderWidth', 'hoverBackgroundColor', 'hoverBorderColor', 'hoverBorderWidth', 'hoverRadius', 'hitRadius', 'pointStyle', 'rotation' ];
for (i = 0, ilen = keys.length; i < ilen; ++i) { key = keys[i]; values[key] = resolve$2([ custom[key], dataset[key], options[key] ], context, index); }
// Custom radius resolution values.radius = resolve$2([ custom.radius, data ? data.r : undefined, dataset.radius, options.radius ], context, index);
return values; } });
var resolve$3 = helpers$1.options.resolve; var valueOrDefault$4 = helpers$1.valueOrDefault;
core_defaults._set('doughnut', { animation: { // Boolean - Whether we animate the rotation of the Doughnut animateRotate: true, // Boolean - Whether we animate scaling the Doughnut from the centre animateScale: false }, hover: { mode: 'single' }, legendCallback: function(chart) { var text = [];
text.push('- ');
var data = chart.data;
var datasets = data.datasets;
var labels = data.labels;
if (datasets.length) {
for (var i = 0; i < datasets[0].data.length; ++i) {
text.push('
- '); if (labels[i]) { text.push(labels[i]); } text.push(' ');
} }
text.push('return text.join(); }, legend: { labels: { generateLabels: function(chart) { var data = chart.data; if (data.labels.length && data.datasets.length) { return data.labels.map(function(label, i) { var meta = chart.getDatasetMeta(0); var ds = data.datasets[0]; var arc = meta.data[i]; var custom = arc && arc.custom || {}; var arcOpts = chart.options.elements.arc; var fill = resolve$3([custom.backgroundColor, ds.backgroundColor, arcOpts.backgroundColor], undefined, i); var stroke = resolve$3([custom.borderColor, ds.borderColor, arcOpts.borderColor], undefined, i); var bw = resolve$3([custom.borderWidth, ds.borderWidth, arcOpts.borderWidth], undefined, i);
return { text: label, fillStyle: fill, strokeStyle: stroke, lineWidth: bw, hidden: isNaN(ds.data[i]) || meta.data[i].hidden,
// Extra data used for toggling the correct item index: i }; }); } return []; } },
onClick: function(e, legendItem) { var index = legendItem.index; var chart = this.chart; var i, ilen, meta;
for (i = 0, ilen = (chart.data.datasets || []).length; i < ilen; ++i) { meta = chart.getDatasetMeta(i); // toggle visibility of index if exists if (meta.data[index]) { meta.data[index].hidden = !meta.data[index].hidden; } }
chart.update(); } },
// The percentage of the chart that we cut out of the middle. cutoutPercentage: 50,
// The rotation of the chart, where the first data arc begins. rotation: Math.PI * -0.5,
// The total circumference of the chart. circumference: Math.PI * 2.0,
// Need to override these to give a nice default tooltips: { callbacks: { title: function() { return ; }, label: function(tooltipItem, data) { var dataLabel = data.labels[tooltipItem.index]; var value = ': ' + data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index];
if (helpers$1.isArray(dataLabel)) { // show value on first line of multiline label // need to clone because we are changing the value dataLabel = dataLabel.slice(); dataLabel[0] += value; } else { dataLabel += value; }
return dataLabel; } } } });
var controller_doughnut = core_datasetController.extend({
dataElementType: elements.Arc,
linkScales: helpers$1.noop,
// Get index of the dataset in relation to the visible datasets. This allows determining the inner and outer radius correctly getRingIndex: function(datasetIndex) { var ringIndex = 0;
for (var j = 0; j < datasetIndex; ++j) { if (this.chart.isDatasetVisible(j)) { ++ringIndex; } }
return ringIndex; },
update: function(reset) { var me = this; var chart = me.chart; var chartArea = chart.chartArea; var opts = chart.options; var availableWidth = chartArea.right - chartArea.left; var availableHeight = chartArea.bottom - chartArea.top; var minSize = Math.min(availableWidth, availableHeight); var offset = {x: 0, y: 0}; var meta = me.getMeta(); var arcs = meta.data; var cutoutPercentage = opts.cutoutPercentage; var circumference = opts.circumference; var chartWeight = me._getRingWeight(me.index); var i, ilen;
// If the chart's circumference isn't a full circle, calculate minSize as a ratio of the width/height of the arc if (circumference < Math.PI * 2.0) { var startAngle = opts.rotation % (Math.PI * 2.0); startAngle += Math.PI * 2.0 * (startAngle >= Math.PI ? -1 : startAngle < -Math.PI ? 1 : 0); var endAngle = startAngle + circumference; var start = {x: Math.cos(startAngle), y: Math.sin(startAngle)}; var end = {x: Math.cos(endAngle), y: Math.sin(endAngle)}; var contains0 = (startAngle <= 0 && endAngle >= 0) || (startAngle <= Math.PI * 2.0 && Math.PI * 2.0 <= endAngle); var contains90 = (startAngle <= Math.PI * 0.5 && Math.PI * 0.5 <= endAngle) || (startAngle <= Math.PI * 2.5 && Math.PI * 2.5 <= endAngle); var contains180 = (startAngle <= -Math.PI && -Math.PI <= endAngle) || (startAngle <= Math.PI && Math.PI <= endAngle); var contains270 = (startAngle <= -Math.PI * 0.5 && -Math.PI * 0.5 <= endAngle) || (startAngle <= Math.PI * 1.5 && Math.PI * 1.5 <= endAngle); var cutout = cutoutPercentage / 100.0; var min = {x: contains180 ? -1 : Math.min(start.x * (start.x < 0 ? 1 : cutout), end.x * (end.x < 0 ? 1 : cutout)), y: contains270 ? -1 : Math.min(start.y * (start.y < 0 ? 1 : cutout), end.y * (end.y < 0 ? 1 : cutout))}; var max = {x: contains0 ? 1 : Math.max(start.x * (start.x > 0 ? 1 : cutout), end.x * (end.x > 0 ? 1 : cutout)), y: contains90 ? 1 : Math.max(start.y * (start.y > 0 ? 1 : cutout), end.y * (end.y > 0 ? 1 : cutout))}; var size = {width: (max.x - min.x) * 0.5, height: (max.y - min.y) * 0.5}; minSize = Math.min(availableWidth / size.width, availableHeight / size.height); offset = {x: (max.x + min.x) * -0.5, y: (max.y + min.y) * -0.5}; }
for (i = 0, ilen = arcs.length; i < ilen; ++i) { arcs[i]._options = me._resolveElementOptions(arcs[i], i); }
chart.borderWidth = me.getMaxBorderWidth(); chart.outerRadius = Math.max((minSize - chart.borderWidth) / 2, 0); chart.innerRadius = Math.max(cutoutPercentage ? (chart.outerRadius / 100) * (cutoutPercentage) : 0, 0); chart.radiusLength = (chart.outerRadius - chart.innerRadius) / (me._getVisibleDatasetWeightTotal() || 1); chart.offsetX = offset.x * chart.outerRadius; chart.offsetY = offset.y * chart.outerRadius;
meta.total = me.calculateTotal();
me.outerRadius = chart.outerRadius - chart.radiusLength * me._getRingWeightOffset(me.index); me.innerRadius = Math.max(me.outerRadius - chart.radiusLength * chartWeight, 0);
for (i = 0, ilen = arcs.length; i < ilen; ++i) { me.updateElement(arcs[i], i, reset); } },
updateElement: function(arc, index, reset) { var me = this; var chart = me.chart; var chartArea = chart.chartArea; var opts = chart.options; var animationOpts = opts.animation; var centerX = (chartArea.left + chartArea.right) / 2; var centerY = (chartArea.top + chartArea.bottom) / 2; var startAngle = opts.rotation; // non reset case handled later var endAngle = opts.rotation; // non reset case handled later var dataset = me.getDataset(); var circumference = reset && animationOpts.animateRotate ? 0 : arc.hidden ? 0 : me.calculateCircumference(dataset.data[index]) * (opts.circumference / (2.0 * Math.PI)); var innerRadius = reset && animationOpts.animateScale ? 0 : me.innerRadius; var outerRadius = reset && animationOpts.animateScale ? 0 : me.outerRadius; var options = arc._options || {};
helpers$1.extend(arc, { // Utility _datasetIndex: me.index, _index: index,
// Desired view properties _model: { backgroundColor: options.backgroundColor, borderColor: options.borderColor, borderWidth: options.borderWidth, borderAlign: options.borderAlign, x: centerX + chart.offsetX, y: centerY + chart.offsetY, startAngle: startAngle, endAngle: endAngle, circumference: circumference, outerRadius: outerRadius, innerRadius: innerRadius, label: helpers$1.valueAtIndexOrDefault(dataset.label, index, chart.data.labels[index]) } });
var model = arc._model;
// Set correct angles if not resetting if (!reset || !animationOpts.animateRotate) { if (index === 0) { model.startAngle = opts.rotation; } else { model.startAngle = me.getMeta().data[index - 1]._model.endAngle; }
model.endAngle = model.startAngle + model.circumference; }
arc.pivot(); },
calculateTotal: function() { var dataset = this.getDataset(); var meta = this.getMeta(); var total = 0; var value;
helpers$1.each(meta.data, function(element, index) { value = dataset.data[index]; if (!isNaN(value) && !element.hidden) { total += Math.abs(value); } });
/* if (total === 0) { total = NaN; }*/
return total; },
calculateCircumference: function(value) { var total = this.getMeta().total; if (total > 0 && !isNaN(value)) { return (Math.PI * 2.0) * (Math.abs(value) / total); } return 0; },
// gets the max border or hover width to properly scale pie charts getMaxBorderWidth: function(arcs) { var me = this; var max = 0; var chart = me.chart; var i, ilen, meta, arc, controller, options, borderWidth, hoverWidth;
if (!arcs) { // Find the outmost visible dataset for (i = 0, ilen = chart.data.datasets.length; i < ilen; ++i) { if (chart.isDatasetVisible(i)) { meta = chart.getDatasetMeta(i); arcs = meta.data; if (i !== me.index) { controller = meta.controller; } break; } } }
if (!arcs) { return 0; }
for (i = 0, ilen = arcs.length; i < ilen; ++i) { arc = arcs[i]; options = controller ? controller._resolveElementOptions(arc, i) : arc._options; if (options.borderAlign !== 'inner') { borderWidth = options.borderWidth; hoverWidth = options.hoverBorderWidth;
max = borderWidth > max ? borderWidth : max; max = hoverWidth > max ? hoverWidth : max; } } return max; },
/** * @protected */ setHoverStyle: function(arc) { var model = arc._model; var options = arc._options; var getHoverColor = helpers$1.getHoverColor;
arc.$previousStyle = { backgroundColor: model.backgroundColor, borderColor: model.borderColor, borderWidth: model.borderWidth, };
model.backgroundColor = valueOrDefault$4(options.hoverBackgroundColor, getHoverColor(options.backgroundColor)); model.borderColor = valueOrDefault$4(options.hoverBorderColor, getHoverColor(options.borderColor)); model.borderWidth = valueOrDefault$4(options.hoverBorderWidth, options.borderWidth); },
/** * @private */ _resolveElementOptions: function(arc, index) { var me = this; var chart = me.chart; var dataset = me.getDataset(); var custom = arc.custom || {}; var options = chart.options.elements.arc; var values = {}; var i, ilen, key;
// Scriptable options var context = { chart: chart, dataIndex: index, dataset: dataset, datasetIndex: me.index };
var keys = [ 'backgroundColor', 'borderColor', 'borderWidth', 'borderAlign', 'hoverBackgroundColor', 'hoverBorderColor', 'hoverBorderWidth', ];
for (i = 0, ilen = keys.length; i < ilen; ++i) { key = keys[i]; values[key] = resolve$3([ custom[key], dataset[key], options[key] ], context, index); }
return values; },
/** * Get radius length offset of the dataset in relation to the visible datasets weights. This allows determining the inner and outer radius correctly * @private */ _getRingWeightOffset: function(datasetIndex) { var ringWeightOffset = 0;
for (var i = 0; i < datasetIndex; ++i) { if (this.chart.isDatasetVisible(i)) { ringWeightOffset += this._getRingWeight(i); } }
return ringWeightOffset; },
/** * @private */ _getRingWeight: function(dataSetIndex) { return Math.max(valueOrDefault$4(this.chart.data.datasets[dataSetIndex].weight, 1), 0); },
/** * Returns the sum of all visibile data set weights. This value can be 0. * @private */ _getVisibleDatasetWeightTotal: function() { return this._getRingWeightOffset(this.chart.data.datasets.length); } });
core_defaults._set('horizontalBar', { hover: { mode: 'index', axis: 'y' },
scales: { xAxes: [{ type: 'linear', position: 'bottom' }],
yAxes: [{ type: 'category', position: 'left', categoryPercentage: 0.8, barPercentage: 0.9, offset: true, gridLines: { offsetGridLines: true } }] },
elements: { rectangle: { borderSkipped: 'left' } },
tooltips: { mode: 'index', axis: 'y' } });
var controller_horizontalBar = controller_bar.extend({ /** * @private */ _getValueScaleId: function() { return this.getMeta().xAxisID; },
/** * @private */ _getIndexScaleId: function() { return this.getMeta().yAxisID; } });
var valueOrDefault$5 = helpers$1.valueOrDefault; var resolve$4 = helpers$1.options.resolve; var isPointInArea = helpers$1.canvas._isPointInArea;
core_defaults._set('line', { showLines: true, spanGaps: false,
hover: { mode: 'label' },
scales: { xAxes: [{ type: 'category', id: 'x-axis-0' }], yAxes: [{ type: 'linear', id: 'y-axis-0' }] } });
function lineEnabled(dataset, options) { return valueOrDefault$5(dataset.showLine, options.showLines); }
var controller_line = core_datasetController.extend({
datasetElementType: elements.Line,
dataElementType: elements.Point,
update: function(reset) { var me = this; var meta = me.getMeta(); var line = meta.dataset; var points = meta.data || []; var scale = me.getScaleForId(meta.yAxisID); var dataset = me.getDataset(); var showLine = lineEnabled(dataset, me.chart.options); var i, ilen;
// Update Line if (showLine) { // Compatibility: If the properties are defined with only the old name, use those values if ((dataset.tension !== undefined) && (dataset.lineTension === undefined)) { dataset.lineTension = dataset.tension; }
// Utility line._scale = scale; line._datasetIndex = me.index; // Data line._children = points; // Model line._model = me._resolveLineOptions(line);
line.pivot(); }
// Update Points for (i = 0, ilen = points.length; i < ilen; ++i) { me.updateElement(points[i], i, reset); }
if (showLine && line._model.tension !== 0) { me.updateBezierControlPoints(); }
// Now pivot the point for animation for (i = 0, ilen = points.length; i < ilen; ++i) { points[i].pivot(); } },
updateElement: function(point, index, reset) { var me = this; var meta = me.getMeta(); var custom = point.custom || {}; var dataset = me.getDataset(); var datasetIndex = me.index; var value = dataset.data[index]; var yScale = me.getScaleForId(meta.yAxisID); var xScale = me.getScaleForId(meta.xAxisID); var lineModel = meta.dataset._model; var x, y;
var options = me._resolvePointOptions(point, index);
x = xScale.getPixelForValue(typeof value === 'object' ? value : NaN, index, datasetIndex); y = reset ? yScale.getBasePixel() : me.calculatePointY(value, index, datasetIndex);
// Utility point._xScale = xScale; point._yScale = yScale; point._options = options; point._datasetIndex = datasetIndex; point._index = index;
// Desired view properties point._model = { x: x, y: y, skip: custom.skip || isNaN(x) || isNaN(y), // Appearance radius: options.radius, pointStyle: options.pointStyle, rotation: options.rotation, backgroundColor: options.backgroundColor, borderColor: options.borderColor, borderWidth: options.borderWidth, tension: valueOrDefault$5(custom.tension, lineModel ? lineModel.tension : 0), steppedLine: lineModel ? lineModel.steppedLine : false, // Tooltip hitRadius: options.hitRadius }; },
/** * @private */ _resolvePointOptions: function(element, index) { var me = this; var chart = me.chart; var dataset = chart.data.datasets[me.index]; var custom = element.custom || {}; var options = chart.options.elements.point; var values = {}; var i, ilen, key;
// Scriptable options var context = { chart: chart, dataIndex: index, dataset: dataset, datasetIndex: me.index };
var ELEMENT_OPTIONS = { backgroundColor: 'pointBackgroundColor', borderColor: 'pointBorderColor', borderWidth: 'pointBorderWidth', hitRadius: 'pointHitRadius', hoverBackgroundColor: 'pointHoverBackgroundColor', hoverBorderColor: 'pointHoverBorderColor', hoverBorderWidth: 'pointHoverBorderWidth', hoverRadius: 'pointHoverRadius', pointStyle: 'pointStyle', radius: 'pointRadius', rotation: 'pointRotation' }; var keys = Object.keys(ELEMENT_OPTIONS);
for (i = 0, ilen = keys.length; i < ilen; ++i) { key = keys[i]; values[key] = resolve$4([ custom[key], dataset[ELEMENT_OPTIONS[key]], dataset[key], options[key] ], context, index); }
return values; },
/** * @private */ _resolveLineOptions: function(element) { var me = this; var chart = me.chart; var dataset = chart.data.datasets[me.index]; var custom = element.custom || {}; var options = chart.options; var elementOptions = options.elements.line; var values = {}; var i, ilen, key;
var keys = [ 'backgroundColor', 'borderWidth', 'borderColor', 'borderCapStyle', 'borderDash', 'borderDashOffset', 'borderJoinStyle', 'fill', 'cubicInterpolationMode' ];
for (i = 0, ilen = keys.length; i < ilen; ++i) { key = keys[i]; values[key] = resolve$4([ custom[key], dataset[key], elementOptions[key] ]); }
// The default behavior of lines is to break at null values, according // to https://github.com/chartjs/Chart.js/issues/2435#issuecomment-216718158 // This option gives lines the ability to span gaps values.spanGaps = valueOrDefault$5(dataset.spanGaps, options.spanGaps); values.tension = valueOrDefault$5(dataset.lineTension, elementOptions.tension); values.steppedLine = resolve$4([custom.steppedLine, dataset.steppedLine, elementOptions.stepped]);
return values; },
calculatePointY: function(value, index, datasetIndex) { var me = this; var chart = me.chart; var meta = me.getMeta(); var yScale = me.getScaleForId(meta.yAxisID); var sumPos = 0; var sumNeg = 0; var i, ds, dsMeta;
if (yScale.options.stacked) { for (i = 0; i < datasetIndex; i++) { ds = chart.data.datasets[i]; dsMeta = chart.getDatasetMeta(i); if (dsMeta.type === 'line' && dsMeta.yAxisID === yScale.id && chart.isDatasetVisible(i)) { var stackedRightValue = Number(yScale.getRightValue(ds.data[index])); if (stackedRightValue < 0) { sumNeg += stackedRightValue || 0; } else { sumPos += stackedRightValue || 0; } } }
var rightValue = Number(yScale.getRightValue(value)); if (rightValue < 0) { return yScale.getPixelForValue(sumNeg + rightValue); } return yScale.getPixelForValue(sumPos + rightValue); }
return yScale.getPixelForValue(value); },
updateBezierControlPoints: function() { var me = this; var chart = me.chart; var meta = me.getMeta(); var lineModel = meta.dataset._model; var area = chart.chartArea; var points = meta.data || []; var i, ilen, model, controlPoints;
// Only consider points that are drawn in case the spanGaps option is used if (lineModel.spanGaps) { points = points.filter(function(pt) { return !pt._model.skip; }); }
function capControlPoint(pt, min, max) { return Math.max(Math.min(pt, max), min); }
if (lineModel.cubicInterpolationMode === 'monotone') { helpers$1.splineCurveMonotone(points); } else { for (i = 0, ilen = points.length; i < ilen; ++i) { model = points[i]._model; controlPoints = helpers$1.splineCurve( helpers$1.previousItem(points, i)._model, model, helpers$1.nextItem(points, i)._model, lineModel.tension ); model.controlPointPreviousX = controlPoints.previous.x; model.controlPointPreviousY = controlPoints.previous.y; model.controlPointNextX = controlPoints.next.x; model.controlPointNextY = controlPoints.next.y; } }
if (chart.options.elements.line.capBezierPoints) { for (i = 0, ilen = points.length; i < ilen; ++i) { model = points[i]._model; if (isPointInArea(model, area)) { if (i > 0 && isPointInArea(points[i - 1]._model, area)) { model.controlPointPreviousX = capControlPoint(model.controlPointPreviousX, area.left, area.right); model.controlPointPreviousY = capControlPoint(model.controlPointPreviousY, area.top, area.bottom); } if (i < points.length - 1 && isPointInArea(points[i + 1]._model, area)) { model.controlPointNextX = capControlPoint(model.controlPointNextX, area.left, area.right); model.controlPointNextY = capControlPoint(model.controlPointNextY, area.top, area.bottom); } } } } },
draw: function() { var me = this; var chart = me.chart; var meta = me.getMeta(); var points = meta.data || []; var area = chart.chartArea; var ilen = points.length; var halfBorderWidth; var i = 0;
if (lineEnabled(me.getDataset(), chart.options)) { halfBorderWidth = (meta.dataset._model.borderWidth || 0) / 2;
helpers$1.canvas.clipArea(chart.ctx, { left: area.left, right: area.right, top: area.top - halfBorderWidth, bottom: area.bottom + halfBorderWidth });
meta.dataset.draw();
helpers$1.canvas.unclipArea(chart.ctx); }
// Draw the points for (; i < ilen; ++i) { points[i].draw(area); } },
/** * @protected */ setHoverStyle: function(point) { var model = point._model; var options = point._options; var getHoverColor = helpers$1.getHoverColor;
point.$previousStyle = { backgroundColor: model.backgroundColor, borderColor: model.borderColor, borderWidth: model.borderWidth, radius: model.radius };
model.backgroundColor = valueOrDefault$5(options.hoverBackgroundColor, getHoverColor(options.backgroundColor)); model.borderColor = valueOrDefault$5(options.hoverBorderColor, getHoverColor(options.borderColor)); model.borderWidth = valueOrDefault$5(options.hoverBorderWidth, options.borderWidth); model.radius = valueOrDefault$5(options.hoverRadius, options.radius); }, });
var resolve$5 = helpers$1.options.resolve;
core_defaults._set('polarArea', { scale: { type: 'radialLinear', angleLines: { display: false }, gridLines: { circular: true }, pointLabels: { display: false }, ticks: { beginAtZero: true } },
// Boolean - Whether to animate the rotation of the chart animation: { animateRotate: true, animateScale: true },
startAngle: -0.5 * Math.PI, legendCallback: function(chart) { var text = [];
text.push('- ');
var data = chart.data;
var datasets = data.datasets;
var labels = data.labels;
if (datasets.length) {
for (var i = 0; i < datasets[0].data.length; ++i) {
text.push('
- '); if (labels[i]) { text.push(labels[i]); } text.push(' ');
} }
text.push('return text.join(); }, legend: { labels: { generateLabels: function(chart) { var data = chart.data; if (data.labels.length && data.datasets.length) { return data.labels.map(function(label, i) { var meta = chart.getDatasetMeta(0); var ds = data.datasets[0]; var arc = meta.data[i]; var custom = arc.custom || {}; var arcOpts = chart.options.elements.arc; var fill = resolve$5([custom.backgroundColor, ds.backgroundColor, arcOpts.backgroundColor], undefined, i); var stroke = resolve$5([custom.borderColor, ds.borderColor, arcOpts.borderColor], undefined, i); var bw = resolve$5([custom.borderWidth, ds.borderWidth, arcOpts.borderWidth], undefined, i);
return { text: label, fillStyle: fill, strokeStyle: stroke, lineWidth: bw, hidden: isNaN(ds.data[i]) || meta.data[i].hidden,
// Extra data used for toggling the correct item index: i }; }); } return []; } },
onClick: function(e, legendItem) { var index = legendItem.index; var chart = this.chart; var i, ilen, meta;
for (i = 0, ilen = (chart.data.datasets || []).length; i < ilen; ++i) { meta = chart.getDatasetMeta(i); meta.data[index].hidden = !meta.data[index].hidden; }
chart.update(); } },
// Need to override these to give a nice default tooltips: { callbacks: { title: function() { return ; }, label: function(item, data) { return data.labels[item.index] + ': ' + item.yLabel; } } } });
var controller_polarArea = core_datasetController.extend({
dataElementType: elements.Arc,
linkScales: helpers$1.noop,
update: function(reset) { var me = this; var dataset = me.getDataset(); var meta = me.getMeta(); var start = me.chart.options.startAngle || 0; var starts = me._starts = []; var angles = me._angles = []; var arcs = meta.data; var i, ilen, angle;
me._updateRadius();
meta.count = me.countVisibleElements();
for (i = 0, ilen = dataset.data.length; i < ilen; i++) { starts[i] = start; angle = me._computeAngle(i); angles[i] = angle; start += angle; }
for (i = 0, ilen = arcs.length; i < ilen; ++i) { arcs[i]._options = me._resolveElementOptions(arcs[i], i); me.updateElement(arcs[i], i, reset); } },
/** * @private */ _updateRadius: function() { var me = this; var chart = me.chart; var chartArea = chart.chartArea; var opts = chart.options; var minSize = Math.min(chartArea.right - chartArea.left, chartArea.bottom - chartArea.top);
chart.outerRadius = Math.max(minSize / 2, 0); chart.innerRadius = Math.max(opts.cutoutPercentage ? (chart.outerRadius / 100) * (opts.cutoutPercentage) : 1, 0); chart.radiusLength = (chart.outerRadius - chart.innerRadius) / chart.getVisibleDatasetCount();
me.outerRadius = chart.outerRadius - (chart.radiusLength * me.index); me.innerRadius = me.outerRadius - chart.radiusLength; },
updateElement: function(arc, index, reset) { var me = this; var chart = me.chart; var dataset = me.getDataset(); var opts = chart.options; var animationOpts = opts.animation; var scale = chart.scale; var labels = chart.data.labels;
var centerX = scale.xCenter; var centerY = scale.yCenter;
// var negHalfPI = -0.5 * Math.PI; var datasetStartAngle = opts.startAngle; var distance = arc.hidden ? 0 : scale.getDistanceFromCenterForValue(dataset.data[index]); var startAngle = me._starts[index]; var endAngle = startAngle + (arc.hidden ? 0 : me._angles[index]);
var resetRadius = animationOpts.animateScale ? 0 : scale.getDistanceFromCenterForValue(dataset.data[index]); var options = arc._options || {};
helpers$1.extend(arc, { // Utility _datasetIndex: me.index, _index: index, _scale: scale,
// Desired view properties _model: { backgroundColor: options.backgroundColor, borderColor: options.borderColor, borderWidth: options.borderWidth, borderAlign: options.borderAlign, x: centerX, y: centerY, innerRadius: 0, outerRadius: reset ? resetRadius : distance, startAngle: reset && animationOpts.animateRotate ? datasetStartAngle : startAngle, endAngle: reset && animationOpts.animateRotate ? datasetStartAngle : endAngle, label: helpers$1.valueAtIndexOrDefault(labels, index, labels[index]) } });
arc.pivot(); },
countVisibleElements: function() { var dataset = this.getDataset(); var meta = this.getMeta(); var count = 0;
helpers$1.each(meta.data, function(element, index) { if (!isNaN(dataset.data[index]) && !element.hidden) { count++; } });
return count; },
/** * @protected */ setHoverStyle: function(arc) { var model = arc._model; var options = arc._options; var getHoverColor = helpers$1.getHoverColor; var valueOrDefault = helpers$1.valueOrDefault;
arc.$previousStyle = { backgroundColor: model.backgroundColor, borderColor: model.borderColor, borderWidth: model.borderWidth, };
model.backgroundColor = valueOrDefault(options.hoverBackgroundColor, getHoverColor(options.backgroundColor)); model.borderColor = valueOrDefault(options.hoverBorderColor, getHoverColor(options.borderColor)); model.borderWidth = valueOrDefault(options.hoverBorderWidth, options.borderWidth); },
/** * @private */ _resolveElementOptions: function(arc, index) { var me = this; var chart = me.chart; var dataset = me.getDataset(); var custom = arc.custom || {}; var options = chart.options.elements.arc; var values = {}; var i, ilen, key;
// Scriptable options var context = { chart: chart, dataIndex: index, dataset: dataset, datasetIndex: me.index };
var keys = [ 'backgroundColor', 'borderColor', 'borderWidth', 'borderAlign', 'hoverBackgroundColor', 'hoverBorderColor', 'hoverBorderWidth', ];
for (i = 0, ilen = keys.length; i < ilen; ++i) { key = keys[i]; values[key] = resolve$5([ custom[key], dataset[key], options[key] ], context, index); }
return values; },
/** * @private */ _computeAngle: function(index) { var me = this; var count = this.getMeta().count; var dataset = me.getDataset(); var meta = me.getMeta();
if (isNaN(dataset.data[index]) || meta.data[index].hidden) { return 0; }
// Scriptable options var context = { chart: me.chart, dataIndex: index, dataset: dataset, datasetIndex: me.index };
return resolve$5([ me.chart.options.elements.arc.angle, (2 * Math.PI) / count ], context, index); } });
core_defaults._set('pie', helpers$1.clone(core_defaults.doughnut)); core_defaults._set('pie', { cutoutPercentage: 0 });
// Pie charts are Doughnut chart with different defaults var controller_pie = controller_doughnut;
var valueOrDefault$6 = helpers$1.valueOrDefault; var resolve$6 = helpers$1.options.resolve;
core_defaults._set('radar', { scale: { type: 'radialLinear' }, elements: { line: { tension: 0 // no bezier in radar } } });
var controller_radar = core_datasetController.extend({
datasetElementType: elements.Line,
dataElementType: elements.Point,
linkScales: helpers$1.noop,
update: function(reset) { var me = this; var meta = me.getMeta(); var line = meta.dataset; var points = meta.data || []; var scale = me.chart.scale; var dataset = me.getDataset(); var i, ilen;
// Compatibility: If the properties are defined with only the old name, use those values if ((dataset.tension !== undefined) && (dataset.lineTension === undefined)) { dataset.lineTension = dataset.tension; }
// Utility line._scale = scale; line._datasetIndex = me.index; // Data line._children = points; line._loop = true; // Model line._model = me._resolveLineOptions(line);
line.pivot();
// Update Points for (i = 0, ilen = points.length; i < ilen; ++i) { me.updateElement(points[i], i, reset); }
// Update bezier control points me.updateBezierControlPoints();
// Now pivot the point for animation for (i = 0, ilen = points.length; i < ilen; ++i) { points[i].pivot(); } },
updateElement: function(point, index, reset) { var me = this; var custom = point.custom || {}; var dataset = me.getDataset(); var scale = me.chart.scale; var pointPosition = scale.getPointPositionForValue(index, dataset.data[index]); var options = me._resolvePointOptions(point, index); var lineModel = me.getMeta().dataset._model; var x = reset ? scale.xCenter : pointPosition.x; var y = reset ? scale.yCenter : pointPosition.y;
// Utility point._scale = scale; point._options = options; point._datasetIndex = me.index; point._index = index;
// Desired view properties point._model = { x: x, // value not used in dataset scale, but we want a consistent API between scales y: y, skip: custom.skip || isNaN(x) || isNaN(y), // Appearance radius: options.radius, pointStyle: options.pointStyle, rotation: options.rotation, backgroundColor: options.backgroundColor, borderColor: options.borderColor, borderWidth: options.borderWidth, tension: valueOrDefault$6(custom.tension, lineModel ? lineModel.tension : 0),
// Tooltip hitRadius: options.hitRadius }; },
/** * @private */ _resolvePointOptions: function(element, index) { var me = this; var chart = me.chart; var dataset = chart.data.datasets[me.index]; var custom = element.custom || {}; var options = chart.options.elements.point; var values = {}; var i, ilen, key;
// Scriptable options var context = { chart: chart, dataIndex: index, dataset: dataset, datasetIndex: me.index };
var ELEMENT_OPTIONS = { backgroundColor: 'pointBackgroundColor', borderColor: 'pointBorderColor', borderWidth: 'pointBorderWidth', hitRadius: 'pointHitRadius', hoverBackgroundColor: 'pointHoverBackgroundColor', hoverBorderColor: 'pointHoverBorderColor', hoverBorderWidth: 'pointHoverBorderWidth', hoverRadius: 'pointHoverRadius', pointStyle: 'pointStyle', radius: 'pointRadius', rotation: 'pointRotation' }; var keys = Object.keys(ELEMENT_OPTIONS);
for (i = 0, ilen = keys.length; i < ilen; ++i) { key = keys[i]; values[key] = resolve$6([ custom[key], dataset[ELEMENT_OPTIONS[key]], dataset[key], options[key] ], context, index); }
return values; },
/** * @private */ _resolveLineOptions: function(element) { var me = this; var chart = me.chart; var dataset = chart.data.datasets[me.index]; var custom = element.custom || {}; var options = chart.options.elements.line; var values = {}; var i, ilen, key;
var keys = [ 'backgroundColor', 'borderWidth', 'borderColor', 'borderCapStyle', 'borderDash', 'borderDashOffset', 'borderJoinStyle', 'fill' ];
for (i = 0, ilen = keys.length; i < ilen; ++i) { key = keys[i]; values[key] = resolve$6([ custom[key], dataset[key], options[key] ]); }
values.tension = valueOrDefault$6(dataset.lineTension, options.tension);
return values; },
updateBezierControlPoints: function() { var me = this; var meta = me.getMeta(); var area = me.chart.chartArea; var points = meta.data || []; var i, ilen, model, controlPoints;
function capControlPoint(pt, min, max) { return Math.max(Math.min(pt, max), min); }
for (i = 0, ilen = points.length; i < ilen; ++i) { model = points[i]._model; controlPoints = helpers$1.splineCurve( helpers$1.previousItem(points, i, true)._model, model, helpers$1.nextItem(points, i, true)._model, model.tension );
// Prevent the bezier going outside of the bounds of the graph model.controlPointPreviousX = capControlPoint(controlPoints.previous.x, area.left, area.right); model.controlPointPreviousY = capControlPoint(controlPoints.previous.y, area.top, area.bottom); model.controlPointNextX = capControlPoint(controlPoints.next.x, area.left, area.right); model.controlPointNextY = capControlPoint(controlPoints.next.y, area.top, area.bottom); } },
setHoverStyle: function(point) { var model = point._model; var options = point._options; var getHoverColor = helpers$1.getHoverColor;
point.$previousStyle = { backgroundColor: model.backgroundColor, borderColor: model.borderColor, borderWidth: model.borderWidth, radius: model.radius };
model.backgroundColor = valueOrDefault$6(options.hoverBackgroundColor, getHoverColor(options.backgroundColor)); model.borderColor = valueOrDefault$6(options.hoverBorderColor, getHoverColor(options.borderColor)); model.borderWidth = valueOrDefault$6(options.hoverBorderWidth, options.borderWidth); model.radius = valueOrDefault$6(options.hoverRadius, options.radius); } });
core_defaults._set('scatter', { hover: { mode: 'single' },
scales: { xAxes: [{ id: 'x-axis-1', // need an ID so datasets can reference the scale type: 'linear', // scatter should not use a category axis position: 'bottom' }], yAxes: [{ id: 'y-axis-1', type: 'linear', position: 'left' }] },
showLines: false,
tooltips: { callbacks: { title: function() { return ; // doesn't make sense for scatter since data are formatted as a point }, label: function(item) { return '(' + item.xLabel + ', ' + item.yLabel + ')'; } } } });
// Scatter charts use line controllers var controller_scatter = controller_line;
// NOTE export a map in which the key represents the controller type, not // the class, and so must be CamelCase in order to be correctly retrieved // by the controller in core.controller.js (`controllers[meta.type]`).
var controllers = { bar: controller_bar, bubble: controller_bubble, doughnut: controller_doughnut, horizontalBar: controller_horizontalBar, line: controller_line, polarArea: controller_polarArea, pie: controller_pie, radar: controller_radar, scatter: controller_scatter };
/**
* Helper function to get relative position for an event
* @param {Event|IEvent} event - The event to get the position for
* @param {Chart} chart - The chart
* @returns {object} the event position
*/
function getRelativePosition(e, chart) { if (e.native) { return { x: e.x, y: e.y }; }
return helpers$1.getRelativePosition(e, chart); }
/**
* Helper function to traverse all of the visible elements in the chart
* @param {Chart} chart - the chart
* @param {function} handler - the callback to execute for each visible item
*/
function parseVisibleItems(chart, handler) { var datasets = chart.data.datasets; var meta, i, j, ilen, jlen;
for (i = 0, ilen = datasets.length; i < ilen; ++i) { if (!chart.isDatasetVisible(i)) { continue; }
meta = chart.getDatasetMeta(i); for (j = 0, jlen = meta.data.length; j < jlen; ++j) { var element = meta.data[j]; if (!element._view.skip) { handler(element); } } } }
/**
* Helper function to get the items that intersect the event position
* @param {ChartElement[]} items - elements to filter
* @param {object} position - the point to be nearest to
* @return {ChartElement[]} the nearest items
*/
function getIntersectItems(chart, position) { var elements = [];
parseVisibleItems(chart, function(element) { if (element.inRange(position.x, position.y)) { elements.push(element); } });
return elements; }
/**
* Helper function to get the items nearest to the event position considering all visible items in teh chart
* @param {Chart} chart - the chart to look at elements from
* @param {object} position - the point to be nearest to
* @param {boolean} intersect - if true, only consider items that intersect the position
* @param {function} distanceMetric - function to provide the distance between points
* @return {ChartElement[]} the nearest items
*/
function getNearestItems(chart, position, intersect, distanceMetric) { var minDistance = Number.POSITIVE_INFINITY; var nearestItems = [];
parseVisibleItems(chart, function(element) { if (intersect && !element.inRange(position.x, position.y)) { return; }
var center = element.getCenterPoint(); var distance = distanceMetric(position, center); if (distance < minDistance) { nearestItems = [element]; minDistance = distance; } else if (distance === minDistance) { // Can have multiple items at the same distance in which case we sort by size nearestItems.push(element); } });
return nearestItems; }
/**
* Get a distance metric function for two points based on the
* axis mode setting
* @param {string} axis - the axis mode. x|y|xy
*/
function getDistanceMetricForAxis(axis) { var useX = axis.indexOf('x') !== -1; var useY = axis.indexOf('y') !== -1;
return function(pt1, pt2) { var deltaX = useX ? Math.abs(pt1.x - pt2.x) : 0; var deltaY = useY ? Math.abs(pt1.y - pt2.y) : 0; return Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2)); }; }
function indexMode(chart, e, options) { var position = getRelativePosition(e, chart); // Default axis for index mode is 'x' to match old behaviour options.axis = options.axis || 'x'; var distanceMetric = getDistanceMetricForAxis(options.axis); var items = options.intersect ? getIntersectItems(chart, position) : getNearestItems(chart, position, false, distanceMetric); var elements = [];
if (!items.length) { return []; }
chart.data.datasets.forEach(function(dataset, datasetIndex) { if (chart.isDatasetVisible(datasetIndex)) { var meta = chart.getDatasetMeta(datasetIndex); var element = meta.data[items[0]._index];
// don't count items that are skipped (null data) if (element && !element._view.skip) { elements.push(element); } } });
return elements; }
/**
* @interface IInteractionOptions */
/**
* If true, only consider items that intersect the point * @name IInterfaceOptions#boolean * @type Boolean */
/**
* Contains interaction related functions * @namespace Chart.Interaction */
var core_interaction = { // Helper function for different modes modes: { single: function(chart, e) { var position = getRelativePosition(e, chart); var elements = [];
parseVisibleItems(chart, function(element) { if (element.inRange(position.x, position.y)) { elements.push(element); return elements; } });
return elements.slice(0, 1); },
/** * @function Chart.Interaction.modes.label * @deprecated since version 2.4.0 * @todo remove at version 3 * @private */ label: indexMode,
/** * Returns items at the same index. If the options.intersect parameter is true, we only return items if we intersect something * If the options.intersect mode is false, we find the nearest item and return the items at the same index as that item * @function Chart.Interaction.modes.index * @since v2.4.0 * @param {Chart} chart - the chart we are returning items from * @param {Event} e - the event we are find things at * @param {IInteractionOptions} options - options to use during interaction * @return {Chart.Element[]} Array of elements that are under the point. If none are found, an empty array is returned */ index: indexMode,
/** * Returns items in the same dataset. If the options.intersect parameter is true, we only return items if we intersect something * If the options.intersect is false, we find the nearest item and return the items in that dataset * @function Chart.Interaction.modes.dataset * @param {Chart} chart - the chart we are returning items from * @param {Event} e - the event we are find things at * @param {IInteractionOptions} options - options to use during interaction * @return {Chart.Element[]} Array of elements that are under the point. If none are found, an empty array is returned */ dataset: function(chart, e, options) { var position = getRelativePosition(e, chart); options.axis = options.axis || 'xy'; var distanceMetric = getDistanceMetricForAxis(options.axis); var items = options.intersect ? getIntersectItems(chart, position) : getNearestItems(chart, position, false, distanceMetric);
if (items.length > 0) { items = chart.getDatasetMeta(items[0]._datasetIndex).data; }
return items; },
/** * @function Chart.Interaction.modes.x-axis * @deprecated since version 2.4.0. Use index mode and intersect == true * @todo remove at version 3 * @private */ 'x-axis': function(chart, e) { return indexMode(chart, e, {intersect: false}); },
/** * Point mode returns all elements that hit test based on the event position * of the event * @function Chart.Interaction.modes.intersect * @param {Chart} chart - the chart we are returning items from * @param {Event} e - the event we are find things at * @return {Chart.Element[]} Array of elements that are under the point. If none are found, an empty array is returned */ point: function(chart, e) { var position = getRelativePosition(e, chart); return getIntersectItems(chart, position); },
/** * nearest mode returns the element closest to the point * @function Chart.Interaction.modes.intersect * @param {Chart} chart - the chart we are returning items from * @param {Event} e - the event we are find things at * @param {IInteractionOptions} options - options to use * @return {Chart.Element[]} Array of elements that are under the point. If none are found, an empty array is returned */ nearest: function(chart, e, options) { var position = getRelativePosition(e, chart); options.axis = options.axis || 'xy'; var distanceMetric = getDistanceMetricForAxis(options.axis); return getNearestItems(chart, position, options.intersect, distanceMetric); },
/** * x mode returns the elements that hit-test at the current x coordinate * @function Chart.Interaction.modes.x * @param {Chart} chart - the chart we are returning items from * @param {Event} e - the event we are find things at * @param {IInteractionOptions} options - options to use * @return {Chart.Element[]} Array of elements that are under the point. If none are found, an empty array is returned */ x: function(chart, e, options) { var position = getRelativePosition(e, chart); var items = []; var intersectsItem = false;
parseVisibleItems(chart, function(element) { if (element.inXRange(position.x)) { items.push(element); }
if (element.inRange(position.x, position.y)) { intersectsItem = true; } });
// If we want to trigger on an intersect and we don't have any items // that intersect the position, return nothing if (options.intersect && !intersectsItem) { items = []; } return items; },
/** * y mode returns the elements that hit-test at the current y coordinate * @function Chart.Interaction.modes.y * @param {Chart} chart - the chart we are returning items from * @param {Event} e - the event we are find things at * @param {IInteractionOptions} options - options to use * @return {Chart.Element[]} Array of elements that are under the point. If none are found, an empty array is returned */ y: function(chart, e, options) { var position = getRelativePosition(e, chart); var items = []; var intersectsItem = false;
parseVisibleItems(chart, function(element) { if (element.inYRange(position.y)) { items.push(element); }
if (element.inRange(position.x, position.y)) { intersectsItem = true; } });
// If we want to trigger on an intersect and we don't have any items // that intersect the position, return nothing if (options.intersect && !intersectsItem) { items = []; } return items; } } };
function filterByPosition(array, position) { return helpers$1.where(array, function(v) { return v.position === position; }); }
function sortByWeight(array, reverse) { array.forEach(function(v, i) { v._tmpIndex_ = i; return v; }); array.sort(function(a, b) { var v0 = reverse ? b : a; var v1 = reverse ? a : b; return v0.weight === v1.weight ? v0._tmpIndex_ - v1._tmpIndex_ : v0.weight - v1.weight; }); array.forEach(function(v) { delete v._tmpIndex_; }); }
function findMaxPadding(boxes) { var top = 0; var left = 0; var bottom = 0; var right = 0; helpers$1.each(boxes, function(box) { if (box.getPadding) { var boxPadding = box.getPadding(); top = Math.max(top, boxPadding.top); left = Math.max(left, boxPadding.left); bottom = Math.max(bottom, boxPadding.bottom); right = Math.max(right, boxPadding.right); } }); return { top: top, left: left, bottom: bottom, right: right }; }
function addSizeByPosition(boxes, size) { helpers$1.each(boxes, function(box) { size[box.position] += box.isHorizontal() ? box.height : box.width; }); }
core_defaults._set('global', { layout: { padding: { top: 0, right: 0, bottom: 0, left: 0 } } });
/**
* @interface ILayoutItem
* @prop {string} position - The position of the item in the chart layout. Possible values are
* 'left', 'top', 'right', 'bottom', and 'chartArea'
* @prop {number} weight - The weight used to sort the item. Higher weights are further away from the chart area
* @prop {boolean} fullWidth - if true, and the item is horizontal, then push vertical boxes down
* @prop {function} isHorizontal - returns true if the layout item is horizontal (ie. top or bottom)
* @prop {function} update - Takes two parameters: width and height. Returns size of item
* @prop {function} getPadding - Returns an object with padding on the edges
* @prop {number} width - Width of item. Must be valid after update()
* @prop {number} height - Height of item. Must be valid after update()
* @prop {number} left - Left edge of the item. Set by layout system and cannot be used in update
* @prop {number} top - Top edge of the item. Set by layout system and cannot be used in update
* @prop {number} right - Right edge of the item. Set by layout system and cannot be used in update
* @prop {number} bottom - Bottom edge of the item. Set by layout system and cannot be used in update
*/
// The layout service is very self explanatory. It's responsible for the layout within a chart. // Scales, Legends and Plugins all rely on the layout service and can easily register to be placed anywhere they need // It is this service's responsibility of carrying out that layout. var core_layouts = { defaults: {},
/** * Register a box to a chart. * A box is simply a reference to an object that requires layout. eg. Scales, Legend, Title. * @param {Chart} chart - the chart to use * @param {ILayoutItem} item - the item to add to be layed out */ addBox: function(chart, item) { if (!chart.boxes) { chart.boxes = []; }
// initialize item with default values item.fullWidth = item.fullWidth || false; item.position = item.position || 'top'; item.weight = item.weight || 0;
chart.boxes.push(item); },
/** * Remove a layoutItem from a chart * @param {Chart} chart - the chart to remove the box from * @param {ILayoutItem} layoutItem - the item to remove from the layout */ removeBox: function(chart, layoutItem) { var index = chart.boxes ? chart.boxes.indexOf(layoutItem) : -1; if (index !== -1) { chart.boxes.splice(index, 1); } },
/** * Sets (or updates) options on the given `item`. * @param {Chart} chart - the chart in which the item lives (or will be added to) * @param {ILayoutItem} item - the item to configure with the given options * @param {object} options - the new item options. */ configure: function(chart, item, options) { var props = ['fullWidth', 'position', 'weight']; var ilen = props.length; var i = 0; var prop;
for (; i < ilen; ++i) { prop = props[i]; if (options.hasOwnProperty(prop)) { item[prop] = options[prop]; } } },
/** * Fits boxes of the given chart into the given size by having each box measure itself * then running a fitting algorithm * @param {Chart} chart - the chart * @param {number} width - the width to fit into * @param {number} height - the height to fit into */ update: function(chart, width, height) { if (!chart) { return; }
var layoutOptions = chart.options.layout || {}; var padding = helpers$1.options.toPadding(layoutOptions.padding); var leftPadding = padding.left; var rightPadding = padding.right; var topPadding = padding.top; var bottomPadding = padding.bottom;
var leftBoxes = filterByPosition(chart.boxes, 'left'); var rightBoxes = filterByPosition(chart.boxes, 'right'); var topBoxes = filterByPosition(chart.boxes, 'top'); var bottomBoxes = filterByPosition(chart.boxes, 'bottom'); var chartAreaBoxes = filterByPosition(chart.boxes, 'chartArea');
// Sort boxes by weight. A higher weight is further away from the chart area sortByWeight(leftBoxes, true); sortByWeight(rightBoxes, false); sortByWeight(topBoxes, true); sortByWeight(bottomBoxes, false);
var verticalBoxes = leftBoxes.concat(rightBoxes); var horizontalBoxes = topBoxes.concat(bottomBoxes); var outerBoxes = verticalBoxes.concat(horizontalBoxes);
// Essentially we now have any number of boxes on each of the 4 sides. // Our canvas looks like the following. // The areas L1 and L2 are the left axes. R1 is the right axis, T1 is the top axis and // B1 is the bottom axis // There are also 4 quadrant-like locations (left to right instead of clockwise) reserved for chart overlays // These locations are single-box locations only, when trying to register a chartArea location that is already taken, // an error will be thrown. // // |----------------------------------------------------| // | T1 (Full Width) | // |----------------------------------------------------| // | | | T2 | | // | |----|-------------------------------------|----| // | | | C1 | | C2 | | // | | |----| |----| | // | | | | | // | L1 | L2 | ChartArea (C0) | R1 | // | | | | | // | | |----| |----| | // | | | C3 | | C4 | | // | |----|-------------------------------------|----| // | | | B1 | | // |----------------------------------------------------| // | B2 (Full Width) | // |----------------------------------------------------| // // What we do to find the best sizing, we do the following // 1. Determine the minimum size of the chart area. // 2. Split the remaining width equally between each vertical axis // 3. Split the remaining height equally between each horizontal axis // 4. Give each layout the maximum size it can be. The layout will return it's minimum size // 5. Adjust the sizes of each axis based on it's minimum reported size. // 6. Refit each axis // 7. Position each axis in the final location // 8. Tell the chart the final location of the chart area // 9. Tell any axes that overlay the chart area the positions of the chart area
// Step 1 var chartWidth = width - leftPadding - rightPadding; var chartHeight = height - topPadding - bottomPadding; var chartAreaWidth = chartWidth / 2; // min 50%
// Step 2 var verticalBoxWidth = (width - chartAreaWidth) / verticalBoxes.length;
// Step 3 // TODO re-limit horizontal axis height (this limit has affected only padding calculation since PR 1837) // var horizontalBoxHeight = (height - chartAreaHeight) / horizontalBoxes.length;
// Step 4 var maxChartAreaWidth = chartWidth; var maxChartAreaHeight = chartHeight; var outerBoxSizes = {top: topPadding, left: leftPadding, bottom: bottomPadding, right: rightPadding}; var minBoxSizes = []; var maxPadding;
function getMinimumBoxSize(box) { var minSize; var isHorizontal = box.isHorizontal();
if (isHorizontal) { minSize = box.update(box.fullWidth ? chartWidth : maxChartAreaWidth, chartHeight / 2); maxChartAreaHeight -= minSize.height; } else { minSize = box.update(verticalBoxWidth, maxChartAreaHeight); maxChartAreaWidth -= minSize.width; }
minBoxSizes.push({ horizontal: isHorizontal, width: minSize.width, box: box, }); }
helpers$1.each(outerBoxes, getMinimumBoxSize);
// If a horizontal box has padding, we move the left boxes over to avoid ugly charts (see issue #2478) maxPadding = findMaxPadding(outerBoxes);
// At this point, maxChartAreaHeight and maxChartAreaWidth are the size the chart area could // be if the axes are drawn at their minimum sizes. // Steps 5 & 6
// Function to fit a box function fitBox(box) { var minBoxSize = helpers$1.findNextWhere(minBoxSizes, function(minBox) { return minBox.box === box; });
if (minBoxSize) { if (minBoxSize.horizontal) { var scaleMargin = { left: Math.max(outerBoxSizes.left, maxPadding.left), right: Math.max(outerBoxSizes.right, maxPadding.right), top: 0, bottom: 0 };
// Don't use min size here because of label rotation. When the labels are rotated, their rotation highly depends // on the margin. Sometimes they need to increase in size slightly box.update(box.fullWidth ? chartWidth : maxChartAreaWidth, chartHeight / 2, scaleMargin); } else { box.update(minBoxSize.width, maxChartAreaHeight); } } }
// Update, and calculate the left and right margins for the horizontal boxes helpers$1.each(verticalBoxes, fitBox); addSizeByPosition(verticalBoxes, outerBoxSizes);
// Set the Left and Right margins for the horizontal boxes helpers$1.each(horizontalBoxes, fitBox); addSizeByPosition(horizontalBoxes, outerBoxSizes);
function finalFitVerticalBox(box) { var minBoxSize = helpers$1.findNextWhere(minBoxSizes, function(minSize) { return minSize.box === box; });
var scaleMargin = { left: 0, right: 0, top: outerBoxSizes.top, bottom: outerBoxSizes.bottom };
if (minBoxSize) { box.update(minBoxSize.width, maxChartAreaHeight, scaleMargin); } }
// Let the left layout know the final margin helpers$1.each(verticalBoxes, finalFitVerticalBox);
// Recalculate because the size of each layout might have changed slightly due to the margins (label rotation for instance) outerBoxSizes = {top: topPadding, left: leftPadding, bottom: bottomPadding, right: rightPadding}; addSizeByPosition(outerBoxes, outerBoxSizes);
// We may be adding some padding to account for rotated x axis labels var leftPaddingAddition = Math.max(maxPadding.left - outerBoxSizes.left, 0); outerBoxSizes.left += leftPaddingAddition; outerBoxSizes.right += Math.max(maxPadding.right - outerBoxSizes.right, 0);
var topPaddingAddition = Math.max(maxPadding.top - outerBoxSizes.top, 0); outerBoxSizes.top += topPaddingAddition; outerBoxSizes.bottom += Math.max(maxPadding.bottom - outerBoxSizes.bottom, 0);
// Figure out if our chart area changed. This would occur if the dataset layout label rotation // changed due to the application of the margins in step 6. Since we can only get bigger, this is safe to do // without calling `fit` again var newMaxChartAreaHeight = height - outerBoxSizes.top - outerBoxSizes.bottom; var newMaxChartAreaWidth = width - outerBoxSizes.left - outerBoxSizes.right;
if (newMaxChartAreaWidth !== maxChartAreaWidth || newMaxChartAreaHeight !== maxChartAreaHeight) { helpers$1.each(verticalBoxes, function(box) { box.height = newMaxChartAreaHeight; });
helpers$1.each(horizontalBoxes, function(box) { if (!box.fullWidth) { box.width = newMaxChartAreaWidth; } });
maxChartAreaHeight = newMaxChartAreaHeight; maxChartAreaWidth = newMaxChartAreaWidth; }
// Step 7 - Position the boxes var left = leftPadding + leftPaddingAddition; var top = topPadding + topPaddingAddition;
function placeBox(box) { if (box.isHorizontal()) { box.left = box.fullWidth ? leftPadding : outerBoxSizes.left; box.right = box.fullWidth ? width - rightPadding : outerBoxSizes.left + maxChartAreaWidth; box.top = top; box.bottom = top + box.height;
// Move to next point top = box.bottom;
} else {
box.left = left; box.right = left + box.width; box.top = outerBoxSizes.top; box.bottom = outerBoxSizes.top + maxChartAreaHeight;
// Move to next point left = box.right; } }
helpers$1.each(leftBoxes.concat(topBoxes), placeBox);
// Account for chart width and height left += maxChartAreaWidth; top += maxChartAreaHeight;
helpers$1.each(rightBoxes, placeBox); helpers$1.each(bottomBoxes, placeBox);
// Step 8 chart.chartArea = { left: outerBoxSizes.left, top: outerBoxSizes.top, right: outerBoxSizes.left + maxChartAreaWidth, bottom: outerBoxSizes.top + maxChartAreaHeight };
// Step 9 helpers$1.each(chartAreaBoxes, function(box) { box.left = chart.chartArea.left; box.top = chart.chartArea.top; box.right = chart.chartArea.right; box.bottom = chart.chartArea.bottom;
box.update(maxChartAreaWidth, maxChartAreaHeight); }); } };
/**
* Platform fallback implementation (minimal). * @see https://github.com/chartjs/Chart.js/pull/4591#issuecomment-319575939 */
var platform_basic = { acquireContext: function(item) { if (item && item.canvas) { // Support for any object associated to a canvas (including a context2d) item = item.canvas; }
return item && item.getContext('2d') || null; } };
var platform_dom = "/*\n * DOM element rendering detection\n * https://davidwalsh.name/detect-node-insertion\n */\n@keyframes chartjs-render-animation {\n\tfrom { opacity: 0.99; }\n\tto { opacity: 1; }\n}\n\n.chartjs-render-monitor {\n\tanimation: chartjs-render-animation 0.001s;\n}\n\n/*\n * DOM element resizing detection\n * https://github.com/marcj/css-element-queries\n */\n.chartjs-size-monitor,\n.chartjs-size-monitor-expand,\n.chartjs-size-monitor-shrink {\n\tposition: absolute;\n\tdirection: ltr;\n\tleft: 0;\n\ttop: 0;\n\tright: 0;\n\tbottom: 0;\n\toverflow: hidden;\n\tpointer-events: none;\n\tvisibility: hidden;\n\tz-index: -1;\n}\n\n.chartjs-size-monitor-expand > div {\n\tposition: absolute;\n\twidth: 1000000px;\n\theight: 1000000px;\n\tleft: 0;\n\ttop: 0;\n}\n\n.chartjs-size-monitor-shrink > div {\n\tposition: absolute;\n\twidth: 200%;\n\theight: 200%;\n\tleft: 0;\n\ttop: 0;\n}\n";
var platform_dom$1 = /*#__PURE__*/Object.freeze({ default: platform_dom });
function getCjsExportFromNamespace (n) { return n && n.default || n; }
var stylesheet = getCjsExportFromNamespace(platform_dom$1);
var EXPANDO_KEY = '$chartjs'; var CSS_PREFIX = 'chartjs-'; var CSS_SIZE_MONITOR = CSS_PREFIX + 'size-monitor'; var CSS_RENDER_MONITOR = CSS_PREFIX + 'render-monitor'; var CSS_RENDER_ANIMATION = CSS_PREFIX + 'render-animation'; var ANIMATION_START_EVENTS = ['animationstart', 'webkitAnimationStart'];
/**
* DOM event types -> Chart.js event types. * Note: only events with different types are mapped. * @see https://developer.mozilla.org/en-US/docs/Web/Events */
var EVENT_TYPES = { touchstart: 'mousedown', touchmove: 'mousemove', touchend: 'mouseup', pointerenter: 'mouseenter', pointerdown: 'mousedown', pointermove: 'mousemove', pointerup: 'mouseup', pointerleave: 'mouseout', pointerout: 'mouseout' };
/**
* 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 {number} Size in pixels or undefined if unknown. */
function readUsedSize(element, property) { var value = helpers$1.getStyle(element, property); var matches = value && value.match(/^(\d+)(\.\d+)?px$/); return matches ? Number(matches[1]) : undefined; }
/**
* Initializes the canvas style and render size without modifying the canvas display size, * since responsiveness is handled by the controller.resize() method. The config is used * to determine the aspect ratio to apply in case no explicit height has been specified. */
function initCanvas(canvas, config) { var style = canvas.style;
// NOTE(SB) canvas.getAttribute('width') !== canvas.width: in the first case it // returns null or if no explicit value has been set to the canvas attribute. var renderHeight = canvas.getAttribute('height'); var renderWidth = canvas.getAttribute('width');
// Chart.js modifies some canvas values that we want to restore on destroy canvas[EXPANDO_KEY] = { initial: { height: renderHeight, width: renderWidth, style: { display: style.display, height: style.height, width: style.width } } };
// Force canvas to display as block to avoid extra space caused by inline // elements, which would interfere with the responsive resize process. // https://github.com/chartjs/Chart.js/issues/2538 style.display = style.display || 'block';
if (renderWidth === null || renderWidth === ) { var displayWidth = readUsedSize(canvas, 'width'); if (displayWidth !== undefined) { canvas.width = displayWidth; } }
if (renderHeight === null || renderHeight === ) { if (canvas.style.height === ) { // If no explicit render height and style height, let's apply the aspect ratio, // which one can be specified by the user but also by charts as default option // (i.e. options.aspectRatio). If not specified, use canvas aspect ratio of 2. canvas.height = canvas.width / (config.options.aspectRatio || 2); } else { var displayHeight = readUsedSize(canvas, 'height'); if (displayWidth !== undefined) { canvas.height = displayHeight; } } }
return canvas; }
/**
* Detects support for options object argument in addEventListener. * https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Safely_detecting_option_support * @private */
var supportsEventListenerOptions = (function() { var supports = false; try { var options = Object.defineProperty({}, 'passive', { // eslint-disable-next-line getter-return get: function() { supports = true; } }); window.addEventListener('e', null, options); } catch (e) { // continue regardless of error } return supports; }());
// Default passive to true as expected by Chrome for 'touchstart' and 'touchend' events. // https://github.com/chartjs/Chart.js/issues/4287 var eventListenerOptions = supportsEventListenerOptions ? {passive: true} : false;
function addListener(node, type, listener) { node.addEventListener(type, listener, eventListenerOptions); }
function removeListener(node, type, listener) { node.removeEventListener(type, listener, eventListenerOptions); }
function createEvent(type, chart, x, y, nativeEvent) { return { type: type, chart: chart, native: nativeEvent || null, x: x !== undefined ? x : null, y: y !== undefined ? y : null, }; }
function fromNativeEvent(event, chart) { var type = EVENT_TYPES[event.type] || event.type; var pos = helpers$1.getRelativePosition(event, chart); return createEvent(type, chart, pos.x, pos.y, event); }
function throttled(fn, thisArg) { var ticking = false; var args = [];
return function() { args = Array.prototype.slice.call(arguments); thisArg = thisArg || this;
if (!ticking) { ticking = true; helpers$1.requestAnimFrame.call(window, function() { ticking = false; fn.apply(thisArg, args); }); } }; }
function createDiv(cls) { var el = document.createElement('div'); el.className = cls || ; return el; }
// Implementation based on https://github.com/marcj/css-element-queries function createResizer(handler) { var maxSize = 1000000;
// NOTE(SB) Don't use innerHTML because it could be considered unsafe. // https://github.com/chartjs/Chart.js/issues/5902 var resizer = createDiv(CSS_SIZE_MONITOR); var expand = createDiv(CSS_SIZE_MONITOR + '-expand'); var shrink = createDiv(CSS_SIZE_MONITOR + '-shrink');
expand.appendChild(createDiv()); shrink.appendChild(createDiv());
resizer.appendChild(expand); resizer.appendChild(shrink); resizer._reset = function() { expand.scrollLeft = maxSize; expand.scrollTop = maxSize; shrink.scrollLeft = maxSize; shrink.scrollTop = maxSize; };
var onScroll = function() { resizer._reset(); handler(); };
addListener(expand, 'scroll', onScroll.bind(expand, 'expand')); addListener(shrink, 'scroll', onScroll.bind(shrink, 'shrink'));
return resizer; }
// https://davidwalsh.name/detect-node-insertion function watchForRender(node, handler) { var expando = node[EXPANDO_KEY] || (node[EXPANDO_KEY] = {}); var proxy = expando.renderProxy = function(e) { if (e.animationName === CSS_RENDER_ANIMATION) { handler(); } };
helpers$1.each(ANIMATION_START_EVENTS, function(type) { addListener(node, type, proxy); });
// #4737: Chrome might skip the CSS animation when the CSS_RENDER_MONITOR class // is removed then added back immediately (same animation frame?). Accessing the // `offsetParent` property will force a reflow and re-evaluate the CSS animation. // https://gist.github.com/paulirish/5d52fb081b3570c81e3a#box-metrics // https://github.com/chartjs/Chart.js/issues/4737 expando.reflow = !!node.offsetParent;
node.classList.add(CSS_RENDER_MONITOR); }
function unwatchForRender(node) { var expando = node[EXPANDO_KEY] || {}; var proxy = expando.renderProxy;
if (proxy) { helpers$1.each(ANIMATION_START_EVENTS, function(type) { removeListener(node, type, proxy); });
delete expando.renderProxy; }
node.classList.remove(CSS_RENDER_MONITOR); }
function addResizeListener(node, listener, chart) { var expando = node[EXPANDO_KEY] || (node[EXPANDO_KEY] = {});
// Let's keep track of this added resizer and thus avoid DOM query when removing it. var resizer = expando.resizer = createResizer(throttled(function() { if (expando.resizer) { var container = chart.options.maintainAspectRatio && node.parentNode; var w = container ? container.clientWidth : 0; listener(createEvent('resize', chart)); if (container && container.clientWidth < w && chart.canvas) { // If the container size shrank during chart resize, let's assume // scrollbar appeared. So we resize again with the scrollbar visible - // effectively making chart smaller and the scrollbar hidden again. // Because we are inside `throttled`, and currently `ticking`, scroll // events are ignored during this whole 2 resize process. // If we assumed wrong and something else happened, we are resizing // twice in a frame (potential performance issue) listener(createEvent('resize', chart)); } } }));
// The resizer needs to be attached to the node parent, so we first need to be // sure that `node` is attached to the DOM before injecting the resizer element. watchForRender(node, function() { if (expando.resizer) { var container = node.parentNode; if (container && container !== resizer.parentNode) { container.insertBefore(resizer, container.firstChild); }
// The container size might have changed, let's reset the resizer state. resizer._reset(); } }); }
function removeResizeListener(node) { var expando = node[EXPANDO_KEY] || {}; var resizer = expando.resizer;
delete expando.resizer; unwatchForRender(node);
if (resizer && resizer.parentNode) { resizer.parentNode.removeChild(resizer); } }
function injectCSS(platform, css) { // https://stackoverflow.com/q/3922139 var style = platform._style || document.createElement('style'); if (!platform._style) { platform._style = style; css = '/* Chart.js */\n' + css; style.setAttribute('type', 'text/css'); document.getElementsByTagName('head')[0].appendChild(style); }
style.appendChild(document.createTextNode(css)); }
var platform_dom$2 = { /** * When `true`, prevents the automatic injection of the stylesheet required to * correctly detect when the chart is added to the DOM and then resized. This * switch has been added to allow external stylesheet (`dist/Chart(.min)?.js`) * to be manually imported to make this library compatible with any CSP. * See https://github.com/chartjs/Chart.js/issues/5208 */ disableCSSInjection: false,
/** * This property holds whether this platform is enabled for the current environment. * Currently used by platform.js to select the proper implementation. * @private */ _enabled: typeof window !== 'undefined' && typeof document !== 'undefined',
/** * @private */ _ensureLoaded: function() { if (this._loaded) { return; }
this._loaded = true;
// https://github.com/chartjs/Chart.js/issues/5208 if (!this.disableCSSInjection) { injectCSS(this, stylesheet); } },
acquireContext: function(item, config) { if (typeof item === 'string') { item = document.getElementById(item); } else if (item.length) { // Support for array based queries (such as jQuery) item = item[0]; }
if (item && item.canvas) { // Support for any object associated to a canvas (including a context2d) item = item.canvas; }
// To prevent canvas fingerprinting, some add-ons undefine the getContext // method, for example: https://github.com/kkapsner/CanvasBlocker // https://github.com/chartjs/Chart.js/issues/2807 var context = item && item.getContext && item.getContext('2d');
// Load platform resources on first chart creation, to make possible to change // platform options after importing the library (e.g. `disableCSSInjection`). this._ensureLoaded();
// `instanceof HTMLCanvasElement/CanvasRenderingContext2D` fails when the item is // inside an iframe or when running in a protected environment. We could guess the // types from their toString() value but let's keep things flexible and assume it's // a sufficient condition if the item has a context2D which has item as `canvas`. // https://github.com/chartjs/Chart.js/issues/3887 // https://github.com/chartjs/Chart.js/issues/4102 // https://github.com/chartjs/Chart.js/issues/4152 if (context && context.canvas === item) { initCanvas(item, config); return context; }
return null; },
releaseContext: function(context) { var canvas = context.canvas; if (!canvas[EXPANDO_KEY]) { return; }
var initial = canvas[EXPANDO_KEY].initial; ['height', 'width'].forEach(function(prop) { var value = initial[prop]; if (helpers$1.isNullOrUndef(value)) { canvas.removeAttribute(prop); } else { canvas.setAttribute(prop, value); } });
helpers$1.each(initial.style || {}, function(value, key) { canvas.style[key] = value; });
// The canvas render size might have been changed (and thus the state stack discarded), // we can't use save() and restore() to restore the initial state. So make sure that at // least the canvas context is reset to the default state by setting the canvas width. // https://www.w3.org/TR/2011/WD-html5-20110525/the-canvas-element.html // eslint-disable-next-line no-self-assign canvas.width = canvas.width;
delete canvas[EXPANDO_KEY]; },
addEventListener: function(chart, type, listener) { var canvas = chart.canvas; if (type === 'resize') { // Note: the resize event is not supported on all browsers. addResizeListener(canvas, listener, chart); return; }
var expando = listener[EXPANDO_KEY] || (listener[EXPANDO_KEY] = {}); var proxies = expando.proxies || (expando.proxies = {}); var proxy = proxies[chart.id + '_' + type] = function(event) { listener(fromNativeEvent(event, chart)); };
addListener(canvas, type, proxy); },
removeEventListener: function(chart, type, listener) { var canvas = chart.canvas; if (type === 'resize') { // Note: the resize event is not supported on all browsers. removeResizeListener(canvas); return; }
var expando = listener[EXPANDO_KEY] || {}; var proxies = expando.proxies || {}; var proxy = proxies[chart.id + '_' + type]; if (!proxy) { return; }
removeListener(canvas, type, proxy); } };
// DEPRECATIONS
/**
* Provided for backward compatibility, use EventTarget.addEventListener instead. * EventTarget.addEventListener compatibility: Chrome, Opera 7, Safari, FF1.5+, IE9+ * @see https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener * @function Chart.helpers.addEvent * @deprecated since version 2.7.0 * @todo remove at version 3 * @private */
helpers$1.addEvent = addListener;
/**
* Provided for backward compatibility, use EventTarget.removeEventListener instead. * EventTarget.removeEventListener compatibility: Chrome, Opera 7, Safari, FF1.5+, IE9+ * @see https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/removeEventListener * @function Chart.helpers.removeEvent * @deprecated since version 2.7.0 * @todo remove at version 3 * @private */
helpers$1.removeEvent = removeListener;
// @TODO Make possible to select another platform at build time. var implementation = platform_dom$2._enabled ? platform_dom$2 : platform_basic;
/**
* @namespace Chart.platform * @see https://chartjs.gitbooks.io/proposals/content/Platform.html * @since 2.4.0 */
var platform = helpers$1.extend({ /** * @since 2.7.0 */ initialize: function() {},
/** * Called at chart construction time, returns a context2d instance implementing * the [W3C Canvas 2D Context API standard]{@link https://www.w3.org/TR/2dcontext/}. * @param {*} item - The native item from which to acquire context (platform specific) * @param {object} options - The chart options * @returns {CanvasRenderingContext2D} context2d instance */ acquireContext: function() {},
/** * Called at chart destruction time, releases any resources associated to the context * previously returned by the acquireContext() method. * @param {CanvasRenderingContext2D} context - The context2d instance * @returns {boolean} true if the method succeeded, else false */ releaseContext: function() {},
/** * Registers the specified listener on the given chart. * @param {Chart} chart - Chart from which to listen for event * @param {string} type - The ({@link IEvent}) type to listen for * @param {function} listener - Receives a notification (an object that implements * the {@link IEvent} interface) when an event of the specified type occurs. */ addEventListener: function() {},
/** * Removes the specified listener previously registered with addEventListener. * @param {Chart} chart - Chart from which to remove the listener * @param {string} type - The ({@link IEvent}) type to remove * @param {function} listener - The listener function to remove from the event target. */ removeEventListener: function() {}
}, implementation);
core_defaults._set('global', { plugins: {} });
/**
* The plugin service singleton * @namespace Chart.plugins * @since 2.1.0 */
var core_plugins = { /** * Globally registered plugins. * @private */ _plugins: [],
/** * This identifier is used to invalidate the descriptors cache attached to each chart * when a global plugin is registered or unregistered. In this case, the cache ID is * incremented and descriptors are regenerated during following API calls. * @private */ _cacheId: 0,
/** * Registers the given plugin(s) if not already registered. * @param {IPlugin[]|IPlugin} plugins plugin instance(s). */ register: function(plugins) { var p = this._plugins; ([]).concat(plugins).forEach(function(plugin) { if (p.indexOf(plugin) === -1) { p.push(plugin); } });
this._cacheId++; },
/** * Unregisters the given plugin(s) only if registered. * @param {IPlugin[]|IPlugin} plugins plugin instance(s). */ unregister: function(plugins) { var p = this._plugins; ([]).concat(plugins).forEach(function(plugin) { var idx = p.indexOf(plugin); if (idx !== -1) { p.splice(idx, 1); } });
this._cacheId++; },
/** * Remove all registered plugins. * @since 2.1.5 */ clear: function() { this._plugins = []; this._cacheId++; },
/** * Returns the number of registered plugins? * @returns {number} * @since 2.1.5 */ count: function() { return this._plugins.length; },
/** * Returns all registered plugin instances. * @returns {IPlugin[]} array of plugin objects. * @since 2.1.5 */ getAll: function() { return this._plugins; },
/** * Calls enabled plugins for `chart` on the specified hook and with the given args. * This method immediately returns as soon as a plugin explicitly returns false. The * returned value can be used, for instance, to interrupt the current action. * @param {Chart} chart - The chart instance for which plugins should be called. * @param {string} hook - The name of the plugin method to call (e.g. 'beforeUpdate'). * @param {Array} [args] - Extra arguments to apply to the hook call. * @returns {boolean} false if any of the plugins return false, else returns true. */ notify: function(chart, hook, args) { var descriptors = this.descriptors(chart); var ilen = descriptors.length; var i, descriptor, plugin, params, method;
for (i = 0; i < ilen; ++i) { descriptor = descriptors[i]; plugin = descriptor.plugin; method = plugin[hook]; if (typeof method === 'function') { params = [chart].concat(args || []); params.push(descriptor.options); if (method.apply(plugin, params) === false) { return false; } } }
return true; },
/** * Returns descriptors of enabled plugins for the given chart. * @returns {object[]} [{ plugin, options }] * @private */ descriptors: function(chart) { var cache = chart.$plugins || (chart.$plugins = {}); if (cache.id === this._cacheId) { return cache.descriptors; }
var plugins = []; var descriptors = []; var config = (chart && chart.config) || {}; var options = (config.options && config.options.plugins) || {};
this._plugins.concat(config.plugins || []).forEach(function(plugin) { var idx = plugins.indexOf(plugin); if (idx !== -1) { return; }
var id = plugin.id; var opts = options[id]; if (opts === false) { return; }
if (opts === true) { opts = helpers$1.clone(core_defaults.global.plugins[id]); }
plugins.push(plugin); descriptors.push({ plugin: plugin, options: opts || {} }); });
cache.descriptors = descriptors; cache.id = this._cacheId; return descriptors; },
/** * Invalidates cache for the given chart: descriptors hold a reference on plugin option, * but in some cases, this reference can be changed by the user when updating options. * https://github.com/chartjs/Chart.js/issues/5111#issuecomment-355934167 * @private */ _invalidate: function(chart) { delete chart.$plugins; } };
var core_scaleService = { // Scale registration object. Extensions can register new scale types (such as log or DB scales) and then // use the new chart options to grab the correct scale constructors: {}, // Use a registration function so that we can move to an ES6 map when we no longer need to support // old browsers
// Scale config defaults defaults: {}, registerScaleType: function(type, scaleConstructor, scaleDefaults) { this.constructors[type] = scaleConstructor; this.defaults[type] = helpers$1.clone(scaleDefaults); }, getScaleConstructor: function(type) { return this.constructors.hasOwnProperty(type) ? this.constructors[type] : undefined; }, getScaleDefaults: function(type) { // Return the scale defaults merged with the global settings so that we always use the latest ones return this.defaults.hasOwnProperty(type) ? helpers$1.merge({}, [core_defaults.scale, this.defaults[type]]) : {}; }, updateScaleDefaults: function(type, additions) { var me = this; if (me.defaults.hasOwnProperty(type)) { me.defaults[type] = helpers$1.extend(me.defaults[type], additions); } }, addScalesToLayout: function(chart) { // Adds each scale to the chart.boxes array to be sized accordingly helpers$1.each(chart.scales, function(scale) { // Set ILayoutItem parameters for backwards compatibility scale.fullWidth = scale.options.fullWidth; scale.position = scale.options.position; scale.weight = scale.options.weight; core_layouts.addBox(chart, scale); }); } };
var valueOrDefault$7 = helpers$1.valueOrDefault;
core_defaults._set('global', { tooltips: { enabled: true, custom: null, mode: 'nearest', position: 'average', intersect: true, backgroundColor: 'rgba(0,0,0,0.8)', titleFontStyle: 'bold', titleSpacing: 2, titleMarginBottom: 6, titleFontColor: '#fff', titleAlign: 'left', bodySpacing: 2, bodyFontColor: '#fff', bodyAlign: 'left', footerFontStyle: 'bold', footerSpacing: 2, footerMarginTop: 6, footerFontColor: '#fff', footerAlign: 'left', yPadding: 6, xPadding: 6, caretPadding: 2, caretSize: 5, cornerRadius: 6, multiKeyBackground: '#fff', displayColors: true, borderColor: 'rgba(0,0,0,0)', borderWidth: 0, callbacks: { // Args are: (tooltipItems, data) beforeTitle: helpers$1.noop, title: function(tooltipItems, data) { var title = ; var labels = data.labels; var labelCount = labels ? labels.length : 0;
if (tooltipItems.length > 0) { var item = tooltipItems[0]; if (item.label) { title = item.label; } else if (item.xLabel) { title = item.xLabel; } else if (labelCount > 0 && item.index < labelCount) { title = labels[item.index]; } }
return title; }, afterTitle: helpers$1.noop,
// Args are: (tooltipItems, data) beforeBody: helpers$1.noop,
// Args are: (tooltipItem, data) beforeLabel: helpers$1.noop, label: function(tooltipItem, data) { var label = data.datasets[tooltipItem.datasetIndex].label || ;
if (label) { label += ': '; } if (!helpers$1.isNullOrUndef(tooltipItem.value)) { label += tooltipItem.value; } else { label += tooltipItem.yLabel; } return label; }, labelColor: function(tooltipItem, chart) { var meta = chart.getDatasetMeta(tooltipItem.datasetIndex); var activeElement = meta.data[tooltipItem.index]; var view = activeElement._view; return { borderColor: view.borderColor, backgroundColor: view.backgroundColor }; }, labelTextColor: function() { return this._options.bodyFontColor; }, afterLabel: helpers$1.noop,
// Args are: (tooltipItems, data) afterBody: helpers$1.noop,
// Args are: (tooltipItems, data) beforeFooter: helpers$1.noop, footer: helpers$1.noop, afterFooter: helpers$1.noop } } });
var positioners = { /** * Average mode places the tooltip at the average position of the elements shown * @function Chart.Tooltip.positioners.average * @param elements {ChartElement[]} the elements being displayed in the tooltip * @returns {object} tooltip position */ average: function(elements) { if (!elements.length) { return false; }
var i, len; var x = 0; var y = 0; var count = 0;
for (i = 0, len = elements.length; i < len; ++i) { var el = elements[i]; if (el && el.hasValue()) { var pos = el.tooltipPosition(); x += pos.x; y += pos.y; ++count; } }
return { x: x / count, y: y / count }; },
/** * Gets the tooltip position nearest of the item nearest to the event position * @function Chart.Tooltip.positioners.nearest * @param elements {Chart.Element[]} the tooltip elements * @param eventPosition {object} the position of the event in canvas coordinates * @returns {object} the tooltip position */ nearest: function(elements, eventPosition) { var x = eventPosition.x; var y = eventPosition.y; var minDistance = Number.POSITIVE_INFINITY; var i, len, nearestElement;
for (i = 0, len = elements.length; i < len; ++i) { var el = elements[i]; if (el && el.hasValue()) { var center = el.getCenterPoint(); var d = helpers$1.distanceBetweenPoints(eventPosition, center);
if (d < minDistance) { minDistance = d; nearestElement = el; } } }
if (nearestElement) { var tp = nearestElement.tooltipPosition(); x = tp.x; y = tp.y; }
return { x: x, y: y }; } };
// Helper to push or concat based on if the 2nd parameter is an array or not function pushOrConcat(base, toPush) { if (toPush) { if (helpers$1.isArray(toPush)) { // base = base.concat(toPush); Array.prototype.push.apply(base, toPush); } else { base.push(toPush); } }
return base; }
/**
* Returns array of strings split by newline
* @param {string} value - The value to split by newline.
* @returns {string[]} value if newline present - Returned from String split() method
* @function
*/
function splitNewlines(str) { if ((typeof str === 'string' || str instanceof String) && str.indexOf('\n') > -1) { return str.split('\n'); } return str; }
/**
* Private helper to create a tooltip item model * @param element - the chart element (point, arc, bar) to create the tooltip item for * @return new tooltip item */
function createTooltipItem(element) { var xScale = element._xScale; var yScale = element._yScale || element._scale; // handle radar || polarArea charts var index = element._index; var datasetIndex = element._datasetIndex; var controller = element._chart.getDatasetMeta(datasetIndex).controller; var indexScale = controller._getIndexScale(); var valueScale = controller._getValueScale();
return { xLabel: xScale ? xScale.getLabelForIndex(index, datasetIndex) : , yLabel: yScale ? yScale.getLabelForIndex(index, datasetIndex) : , label: indexScale ? + indexScale.getLabelForIndex(index, datasetIndex) : , value: valueScale ? + valueScale.getLabelForIndex(index, datasetIndex) : , index: index, datasetIndex: datasetIndex, x: element._model.x, y: element._model.y }; }
/**
* Helper to get the reset model for the tooltip
* @param tooltipOpts {object} the tooltip options
*/
function getBaseModel(tooltipOpts) { var globalDefaults = core_defaults.global;
return { // Positioning xPadding: tooltipOpts.xPadding, yPadding: tooltipOpts.yPadding, xAlign: tooltipOpts.xAlign, yAlign: tooltipOpts.yAlign,
// Body bodyFontColor: tooltipOpts.bodyFontColor, _bodyFontFamily: valueOrDefault$7(tooltipOpts.bodyFontFamily, globalDefaults.defaultFontFamily), _bodyFontStyle: valueOrDefault$7(tooltipOpts.bodyFontStyle, globalDefaults.defaultFontStyle), _bodyAlign: tooltipOpts.bodyAlign, bodyFontSize: valueOrDefault$7(tooltipOpts.bodyFontSize, globalDefaults.defaultFontSize), bodySpacing: tooltipOpts.bodySpacing,
// Title titleFontColor: tooltipOpts.titleFontColor, _titleFontFamily: valueOrDefault$7(tooltipOpts.titleFontFamily, globalDefaults.defaultFontFamily), _titleFontStyle: valueOrDefault$7(tooltipOpts.titleFontStyle, globalDefaults.defaultFontStyle), titleFontSize: valueOrDefault$7(tooltipOpts.titleFontSize, globalDefaults.defaultFontSize), _titleAlign: tooltipOpts.titleAlign, titleSpacing: tooltipOpts.titleSpacing, titleMarginBottom: tooltipOpts.titleMarginBottom,
// Footer footerFontColor: tooltipOpts.footerFontColor, _footerFontFamily: valueOrDefault$7(tooltipOpts.footerFontFamily, globalDefaults.defaultFontFamily), _footerFontStyle: valueOrDefault$7(tooltipOpts.footerFontStyle, globalDefaults.defaultFontStyle), footerFontSize: valueOrDefault$7(tooltipOpts.footerFontSize, globalDefaults.defaultFontSize), _footerAlign: tooltipOpts.footerAlign, footerSpacing: tooltipOpts.footerSpacing, footerMarginTop: tooltipOpts.footerMarginTop,
// Appearance caretSize: tooltipOpts.caretSize, cornerRadius: tooltipOpts.cornerRadius, backgroundColor: tooltipOpts.backgroundColor, opacity: 0, legendColorBackground: tooltipOpts.multiKeyBackground, displayColors: tooltipOpts.displayColors, borderColor: tooltipOpts.borderColor, borderWidth: tooltipOpts.borderWidth }; }
/**
* Get the size of the tooltip */
function getTooltipSize(tooltip, model) { var ctx = tooltip._chart.ctx;
var height = model.yPadding * 2; // Tooltip Padding var width = 0;
// Count of all lines in the body var body = model.body; var combinedBodyLength = body.reduce(function(count, bodyItem) { return count + bodyItem.before.length + bodyItem.lines.length + bodyItem.after.length; }, 0); combinedBodyLength += model.beforeBody.length + model.afterBody.length;
var titleLineCount = model.title.length; var footerLineCount = model.footer.length; var titleFontSize = model.titleFontSize; var bodyFontSize = model.bodyFontSize; var footerFontSize = model.footerFontSize;
height += titleLineCount * titleFontSize; // Title Lines height += titleLineCount ? (titleLineCount - 1) * model.titleSpacing : 0; // Title Line Spacing height += titleLineCount ? model.titleMarginBottom : 0; // Title's bottom Margin height += combinedBodyLength * bodyFontSize; // Body Lines height += combinedBodyLength ? (combinedBodyLength - 1) * model.bodySpacing : 0; // Body Line Spacing height += footerLineCount ? model.footerMarginTop : 0; // Footer Margin height += footerLineCount * (footerFontSize); // Footer Lines height += footerLineCount ? (footerLineCount - 1) * model.footerSpacing : 0; // Footer Line Spacing
// Title width var widthPadding = 0; var maxLineWidth = function(line) { width = Math.max(width, ctx.measureText(line).width + widthPadding); };
ctx.font = helpers$1.fontString(titleFontSize, model._titleFontStyle, model._titleFontFamily); helpers$1.each(model.title, maxLineWidth);
// Body width ctx.font = helpers$1.fontString(bodyFontSize, model._bodyFontStyle, model._bodyFontFamily); helpers$1.each(model.beforeBody.concat(model.afterBody), maxLineWidth);
// Body lines may include some extra width due to the color box widthPadding = model.displayColors ? (bodyFontSize + 2) : 0; helpers$1.each(body, function(bodyItem) { helpers$1.each(bodyItem.before, maxLineWidth); helpers$1.each(bodyItem.lines, maxLineWidth); helpers$1.each(bodyItem.after, maxLineWidth); });
// Reset back to 0 widthPadding = 0;
// Footer width ctx.font = helpers$1.fontString(footerFontSize, model._footerFontStyle, model._footerFontFamily); helpers$1.each(model.footer, maxLineWidth);
// Add padding width += 2 * model.xPadding;
return { width: width, height: height }; }
/**
* Helper to get the alignment of a tooltip given the size */
function determineAlignment(tooltip, size) { var model = tooltip._model; var chart = tooltip._chart; var chartArea = tooltip._chart.chartArea; var xAlign = 'center'; var yAlign = 'center';
if (model.y < size.height) { yAlign = 'top'; } else if (model.y > (chart.height - size.height)) { yAlign = 'bottom'; }
var lf, rf; // functions to determine left, right alignment var olf, orf; // functions to determine if left/right alignment causes tooltip to go outside chart var yf; // function to get the y alignment if the tooltip goes outside of the left or right edges var midX = (chartArea.left + chartArea.right) / 2; var midY = (chartArea.top + chartArea.bottom) / 2;
if (yAlign === 'center') { lf = function(x) { return x <= midX; }; rf = function(x) { return x > midX; }; } else { lf = function(x) { return x <= (size.width / 2); }; rf = function(x) { return x >= (chart.width - (size.width / 2)); }; }
olf = function(x) { return x + size.width + model.caretSize + model.caretPadding > chart.width; }; orf = function(x) { return x - size.width - model.caretSize - model.caretPadding < 0; }; yf = function(y) { return y <= midY ? 'top' : 'bottom'; };
if (lf(model.x)) { xAlign = 'left';
// Is tooltip too wide and goes over the right side of the chart.? if (olf(model.x)) { xAlign = 'center'; yAlign = yf(model.y); } } else if (rf(model.x)) { xAlign = 'right';
// Is tooltip too wide and goes outside left edge of canvas? if (orf(model.x)) { xAlign = 'center'; yAlign = yf(model.y); } }
var opts = tooltip._options; return { xAlign: opts.xAlign ? opts.xAlign : xAlign, yAlign: opts.yAlign ? opts.yAlign : yAlign }; }
/**
* Helper to get the location a tooltip needs to be placed at given the initial position (via the vm) and the size and alignment */
function getBackgroundPoint(vm, size, alignment, chart) { // Background Position var x = vm.x; var y = vm.y;
var caretSize = vm.caretSize; var caretPadding = vm.caretPadding; var cornerRadius = vm.cornerRadius; var xAlign = alignment.xAlign; var yAlign = alignment.yAlign; var paddingAndSize = caretSize + caretPadding; var radiusAndPadding = cornerRadius + caretPadding;
if (xAlign === 'right') { x -= size.width; } else if (xAlign === 'center') { x -= (size.width / 2); if (x + size.width > chart.width) { x = chart.width - size.width; } if (x < 0) { x = 0; } }
if (yAlign === 'top') { y += paddingAndSize; } else if (yAlign === 'bottom') { y -= size.height + paddingAndSize; } else { y -= (size.height / 2); }
if (yAlign === 'center') { if (xAlign === 'left') { x += paddingAndSize; } else if (xAlign === 'right') { x -= paddingAndSize; } } else if (xAlign === 'left') { x -= radiusAndPadding; } else if (xAlign === 'right') { x += radiusAndPadding; }
return { x: x, y: y }; }
function getAlignedX(vm, align) { return align === 'center' ? vm.x + vm.width / 2 : align === 'right' ? vm.x + vm.width - vm.xPadding : vm.x + vm.xPadding; }
/**
* Helper to build before and after body lines */
function getBeforeAfterBodyLines(callback) { return pushOrConcat([], splitNewlines(callback)); }
var exports$3 = core_element.extend({ initialize: function() { this._model = getBaseModel(this._options); this._lastActive = []; },
// Get the title // Args are: (tooltipItem, data) getTitle: function() { var me = this; var opts = me._options; var callbacks = opts.callbacks;
var beforeTitle = callbacks.beforeTitle.apply(me, arguments); var title = callbacks.title.apply(me, arguments); var afterTitle = callbacks.afterTitle.apply(me, arguments);
var lines = []; lines = pushOrConcat(lines, splitNewlines(beforeTitle)); lines = pushOrConcat(lines, splitNewlines(title)); lines = pushOrConcat(lines, splitNewlines(afterTitle));
return lines; },
// Args are: (tooltipItem, data) getBeforeBody: function() { return getBeforeAfterBodyLines(this._options.callbacks.beforeBody.apply(this, arguments)); },
// Args are: (tooltipItem, data) getBody: function(tooltipItems, data) { var me = this; var callbacks = me._options.callbacks; var bodyItems = [];
helpers$1.each(tooltipItems, function(tooltipItem) { var bodyItem = { before: [], lines: [], after: [] }; pushOrConcat(bodyItem.before, splitNewlines(callbacks.beforeLabel.call(me, tooltipItem, data))); pushOrConcat(bodyItem.lines, callbacks.label.call(me, tooltipItem, data)); pushOrConcat(bodyItem.after, splitNewlines(callbacks.afterLabel.call(me, tooltipItem, data)));
bodyItems.push(bodyItem); });
return bodyItems; },
// Args are: (tooltipItem, data) getAfterBody: function() { return getBeforeAfterBodyLines(this._options.callbacks.afterBody.apply(this, arguments)); },
// Get the footer and beforeFooter and afterFooter lines // Args are: (tooltipItem, data) getFooter: function() { var me = this; var callbacks = me._options.callbacks;
var beforeFooter = callbacks.beforeFooter.apply(me, arguments); var footer = callbacks.footer.apply(me, arguments); var afterFooter = callbacks.afterFooter.apply(me, arguments);
var lines = []; lines = pushOrConcat(lines, splitNewlines(beforeFooter)); lines = pushOrConcat(lines, splitNewlines(footer)); lines = pushOrConcat(lines, splitNewlines(afterFooter));
return lines; },
update: function(changed) { var me = this; var opts = me._options;
// Need to regenerate the model because its faster than using extend and it is necessary due to the optimization in Chart.Element.transition // that does _view = _model if ease === 1. This causes the 2nd tooltip update to set properties in both the view and model at the same time // which breaks any animations. var existingModel = me._model; var model = me._model = getBaseModel(opts); var active = me._active;
var data = me._data;
// In the case where active.length === 0 we need to keep these at existing values for good animations var alignment = { xAlign: existingModel.xAlign, yAlign: existingModel.yAlign }; var backgroundPoint = { x: existingModel.x, y: existingModel.y }; var tooltipSize = { width: existingModel.width, height: existingModel.height }; var tooltipPosition = { x: existingModel.caretX, y: existingModel.caretY };
var i, len;
if (active.length) { model.opacity = 1;
var labelColors = []; var labelTextColors = []; tooltipPosition = positioners[opts.position].call(me, active, me._eventPosition);
var tooltipItems = []; for (i = 0, len = active.length; i < len; ++i) { tooltipItems.push(createTooltipItem(active[i])); }
// If the user provided a filter function, use it to modify the tooltip items if (opts.filter) { tooltipItems = tooltipItems.filter(function(a) { return opts.filter(a, data); }); }
// If the user provided a sorting function, use it to modify the tooltip items if (opts.itemSort) { tooltipItems = tooltipItems.sort(function(a, b) { return opts.itemSort(a, b, data); }); }
// Determine colors for boxes helpers$1.each(tooltipItems, function(tooltipItem) { labelColors.push(opts.callbacks.labelColor.call(me, tooltipItem, me._chart)); labelTextColors.push(opts.callbacks.labelTextColor.call(me, tooltipItem, me._chart)); });
// Build the Text Lines
model.title = me.getTitle(tooltipItems, data);
model.beforeBody = me.getBeforeBody(tooltipItems, data);
model.body = me.getBody(tooltipItems, data);
model.afterBody = me.getAfterBody(tooltipItems, data);
model.footer = me.getFooter(tooltipItems, data);
// Initial positioning and colors model.x = tooltipPosition.x; model.y = tooltipPosition.y; model.caretPadding = opts.caretPadding; model.labelColors = labelColors; model.labelTextColors = labelTextColors;
// data points model.dataPoints = tooltipItems;
// We need to determine alignment of the tooltip tooltipSize = getTooltipSize(this, model); alignment = determineAlignment(this, tooltipSize); // Final Size and Position backgroundPoint = getBackgroundPoint(model, tooltipSize, alignment, me._chart); } else { model.opacity = 0; }
model.xAlign = alignment.xAlign; model.yAlign = alignment.yAlign; model.x = backgroundPoint.x; model.y = backgroundPoint.y; model.width = tooltipSize.width; model.height = tooltipSize.height;
// Point where the caret on the tooltip points to model.caretX = tooltipPosition.x; model.caretY = tooltipPosition.y;
me._model = model;
if (changed && opts.custom) { opts.custom.call(me, model); }
return me; },
drawCaret: function(tooltipPoint, size) { var ctx = this._chart.ctx; var vm = this._view; var caretPosition = this.getCaretPosition(tooltipPoint, size, vm);
ctx.lineTo(caretPosition.x1, caretPosition.y1); ctx.lineTo(caretPosition.x2, caretPosition.y2); ctx.lineTo(caretPosition.x3, caretPosition.y3); }, getCaretPosition: function(tooltipPoint, size, vm) { var x1, x2, x3, y1, y2, y3; var caretSize = vm.caretSize; var cornerRadius = vm.cornerRadius; var xAlign = vm.xAlign; var yAlign = vm.yAlign; var ptX = tooltipPoint.x; var ptY = tooltipPoint.y; var width = size.width; var height = size.height;
if (yAlign === 'center') { y2 = ptY + (height / 2);
if (xAlign === 'left') { x1 = ptX; x2 = x1 - caretSize; x3 = x1;
y1 = y2 + caretSize; y3 = y2 - caretSize; } else { x1 = ptX + width; x2 = x1 + caretSize; x3 = x1;
y1 = y2 - caretSize; y3 = y2 + caretSize; } } else { if (xAlign === 'left') { x2 = ptX + cornerRadius + (caretSize); x1 = x2 - caretSize; x3 = x2 + caretSize; } else if (xAlign === 'right') { x2 = ptX + width - cornerRadius - caretSize; x1 = x2 - caretSize; x3 = x2 + caretSize; } else { x2 = vm.caretX; x1 = x2 - caretSize; x3 = x2 + caretSize; } if (yAlign === 'top') { y1 = ptY; y2 = y1 - caretSize; y3 = y1; } else { y1 = ptY + height; y2 = y1 + caretSize; y3 = y1; // invert drawing order var tmp = x3; x3 = x1; x1 = tmp; } } return {x1: x1, x2: x2, x3: x3, y1: y1, y2: y2, y3: y3}; },
drawTitle: function(pt, vm, ctx) { var title = vm.title;
if (title.length) { pt.x = getAlignedX(vm, vm._titleAlign);
ctx.textAlign = vm._titleAlign; ctx.textBaseline = 'top';
var titleFontSize = vm.titleFontSize; var titleSpacing = vm.titleSpacing;
ctx.fillStyle = vm.titleFontColor; ctx.font = helpers$1.fontString(titleFontSize, vm._titleFontStyle, vm._titleFontFamily);
var i, len; for (i = 0, len = title.length; i < len; ++i) { ctx.fillText(title[i], pt.x, pt.y); pt.y += titleFontSize + titleSpacing; // Line Height and spacing
if (i + 1 === title.length) { pt.y += vm.titleMarginBottom - titleSpacing; // If Last, add margin, remove spacing } } } },
drawBody: function(pt, vm, ctx) { var bodyFontSize = vm.bodyFontSize; var bodySpacing = vm.bodySpacing; var bodyAlign = vm._bodyAlign; var body = vm.body; var drawColorBoxes = vm.displayColors; var labelColors = vm.labelColors; var xLinePadding = 0; var colorX = drawColorBoxes ? getAlignedX(vm, 'left') : 0; var textColor;
ctx.textAlign = bodyAlign; ctx.textBaseline = 'top'; ctx.font = helpers$1.fontString(bodyFontSize, vm._bodyFontStyle, vm._bodyFontFamily);
pt.x = getAlignedX(vm, bodyAlign);
// Before Body var fillLineOfText = function(line) { ctx.fillText(line, pt.x + xLinePadding, pt.y); pt.y += bodyFontSize + bodySpacing; };
// Before body lines ctx.fillStyle = vm.bodyFontColor; helpers$1.each(vm.beforeBody, fillLineOfText);
xLinePadding = drawColorBoxes && bodyAlign !== 'right' ? bodyAlign === 'center' ? (bodyFontSize / 2 + 1) : (bodyFontSize + 2) : 0;
// Draw body lines now helpers$1.each(body, function(bodyItem, i) { textColor = vm.labelTextColors[i]; ctx.fillStyle = textColor; helpers$1.each(bodyItem.before, fillLineOfText);
helpers$1.each(bodyItem.lines, function(line) { // Draw Legend-like boxes if needed if (drawColorBoxes) { // Fill a white rect so that colours merge nicely if the opacity is < 1 ctx.fillStyle = vm.legendColorBackground; ctx.fillRect(colorX, pt.y, bodyFontSize, bodyFontSize);
// Border ctx.lineWidth = 1; ctx.strokeStyle = labelColors[i].borderColor; ctx.strokeRect(colorX, pt.y, bodyFontSize, bodyFontSize);
// Inner square ctx.fillStyle = labelColors[i].backgroundColor; ctx.fillRect(colorX + 1, pt.y + 1, bodyFontSize - 2, bodyFontSize - 2); ctx.fillStyle = textColor; }
fillLineOfText(line); });
helpers$1.each(bodyItem.after, fillLineOfText); });
// Reset back to 0 for after body xLinePadding = 0;
// After body lines helpers$1.each(vm.afterBody, fillLineOfText); pt.y -= bodySpacing; // Remove last body spacing },
drawFooter: function(pt, vm, ctx) { var footer = vm.footer;
if (footer.length) { pt.x = getAlignedX(vm, vm._footerAlign); pt.y += vm.footerMarginTop;
ctx.textAlign = vm._footerAlign; ctx.textBaseline = 'top';
ctx.fillStyle = vm.footerFontColor; ctx.font = helpers$1.fontString(vm.footerFontSize, vm._footerFontStyle, vm._footerFontFamily);
helpers$1.each(footer, function(line) { ctx.fillText(line, pt.x, pt.y); pt.y += vm.footerFontSize + vm.footerSpacing; }); } },
drawBackground: function(pt, vm, ctx, tooltipSize) { ctx.fillStyle = vm.backgroundColor; ctx.strokeStyle = vm.borderColor; ctx.lineWidth = vm.borderWidth; var xAlign = vm.xAlign; var yAlign = vm.yAlign; var x = pt.x; var y = pt.y; var width = tooltipSize.width; var height = tooltipSize.height; var radius = vm.cornerRadius;
ctx.beginPath(); ctx.moveTo(x + radius, y); if (yAlign === 'top') { this.drawCaret(pt, tooltipSize); } ctx.lineTo(x + width - radius, y); ctx.quadraticCurveTo(x + width, y, x + width, y + radius); if (yAlign === 'center' && xAlign === 'right') { this.drawCaret(pt, tooltipSize); } ctx.lineTo(x + width, y + height - radius); ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height); if (yAlign === 'bottom') { this.drawCaret(pt, tooltipSize); } ctx.lineTo(x + radius, y + height); ctx.quadraticCurveTo(x, y + height, x, y + height - radius); if (yAlign === 'center' && xAlign === 'left') { this.drawCaret(pt, tooltipSize); } ctx.lineTo(x, y + radius); ctx.quadraticCurveTo(x, y, x + radius, y); ctx.closePath();
ctx.fill();
if (vm.borderWidth > 0) { ctx.stroke(); } },
draw: function() { var ctx = this._chart.ctx; var vm = this._view;
if (vm.opacity === 0) { return; }
var tooltipSize = { width: vm.width, height: vm.height }; var pt = { x: vm.x, y: vm.y };
// IE11/Edge does not like very small opacities, so snap to 0 var opacity = Math.abs(vm.opacity < 1e-3) ? 0 : vm.opacity;
// Truthy/falsey value for empty tooltip var hasTooltipContent = vm.title.length || vm.beforeBody.length || vm.body.length || vm.afterBody.length || vm.footer.length;
if (this._options.enabled && hasTooltipContent) { ctx.save(); ctx.globalAlpha = opacity;
// Draw Background this.drawBackground(pt, vm, ctx, tooltipSize);
// Draw Title, Body, and Footer pt.y += vm.yPadding;
// Titles this.drawTitle(pt, vm, ctx);
// Body this.drawBody(pt, vm, ctx);
// Footer this.drawFooter(pt, vm, ctx);
ctx.restore(); } },
/** * Handle an event * @private * @param {IEvent} event - The event to handle * @returns {boolean} true if the tooltip changed */ handleEvent: function(e) { var me = this; var options = me._options; var changed = false;
me._lastActive = me._lastActive || [];
// Find Active Elements for tooltips if (e.type === 'mouseout') { me._active = []; } else { me._active = me._chart.getElementsAtEventForMode(e, options.mode, options); }
// Remember Last Actives changed = !helpers$1.arrayEquals(me._active, me._lastActive);
// Only handle target event on tooltip change if (changed) { me._lastActive = me._active;
if (options.enabled || options.custom) { me._eventPosition = { x: e.x, y: e.y };
me.update(true); me.pivot(); } }
return changed; } });
/**
* @namespace Chart.Tooltip.positioners */
var positioners_1 = positioners;
var core_tooltip = exports$3; core_tooltip.positioners = positioners_1;
var valueOrDefault$8 = helpers$1.valueOrDefault;
core_defaults._set('global', { elements: {}, events: [ 'mousemove', 'mouseout', 'click', 'touchstart', 'touchmove' ], hover: { onHover: null, mode: 'nearest', intersect: true, animationDuration: 400 }, onClick: null, maintainAspectRatio: true, responsive: true, responsiveAnimationDuration: 0 });
/**
* Recursively merge the given config objects representing the `scales` option * by incorporating scale defaults in `xAxes` and `yAxes` array items, then * returns a deep copy of the result, thus doesn't alter inputs. */
function mergeScaleConfig(/* config objects ... */) { return helpers$1.merge({}, [].slice.call(arguments), { merger: function(key, target, source, options) { if (key === 'xAxes' || key === 'yAxes') { var slen = source[key].length; var i, type, scale;
if (!target[key]) { target[key] = []; }
for (i = 0; i < slen; ++i) { scale = source[key][i]; type = valueOrDefault$8(scale.type, key === 'xAxes' ? 'category' : 'linear');
if (i >= target[key].length) { target[key].push({}); }
if (!target[key][i].type || (scale.type && scale.type !== target[key][i].type)) { // new/untyped scale or type changed: let's apply the new defaults // then merge source scale to correctly overwrite the defaults. helpers$1.merge(target[key][i], [core_scaleService.getScaleDefaults(type), scale]); } else { // scales type are the same helpers$1.merge(target[key][i], scale); } } } else { helpers$1._merger(key, target, source, options); } } }); }
/**
* Recursively merge the given config objects as the root options by handling * default scale options for the `scales` and `scale` properties, then returns * a deep copy of the result, thus doesn't alter inputs. */
function mergeConfig(/* config objects ... */) { return helpers$1.merge({}, [].slice.call(arguments), { merger: function(key, target, source, options) { var tval = target[key] || {}; var sval = source[key];
if (key === 'scales') { // scale config merging is complex. Add our own function here for that target[key] = mergeScaleConfig(tval, sval); } else if (key === 'scale') { // used in polar area & radar charts since there is only one scale target[key] = helpers$1.merge(tval, [core_scaleService.getScaleDefaults(sval.type), sval]); } else { helpers$1._merger(key, target, source, options); } } }); }
function initConfig(config) { config = config || {};
// Do NOT use mergeConfig for the data object because this method merges arrays // and so would change references to labels and datasets, preventing data updates. var data = config.data = config.data || {}; data.datasets = data.datasets || []; data.labels = data.labels || [];
config.options = mergeConfig( core_defaults.global, core_defaults[config.type], config.options || {});
return config; }
function updateConfig(chart) { var newOptions = chart.options;
helpers$1.each(chart.scales, function(scale) { core_layouts.removeBox(chart, scale); });
newOptions = mergeConfig( core_defaults.global, core_defaults[chart.config.type], newOptions);
chart.options = chart.config.options = newOptions; chart.ensureScalesHaveIDs(); chart.buildOrUpdateScales();
// Tooltip chart.tooltip._options = newOptions.tooltips; chart.tooltip.initialize(); }
function positionIsHorizontal(position) { return position === 'top' || position === 'bottom'; }
var Chart = function(item, config) { this.construct(item, config); return this; };
helpers$1.extend(Chart.prototype, /** @lends Chart */ { /** * @private */ construct: function(item, config) { var me = this;
config = initConfig(config);
var context = platform.acquireContext(item, config); var canvas = context && context.canvas; var height = canvas && canvas.height; var width = canvas && canvas.width;
me.id = helpers$1.uid(); me.ctx = context; me.canvas = canvas; me.config = config; me.width = width; me.height = height; me.aspectRatio = height ? width / height : null; me.options = config.options; me._bufferedRender = false;
/** * Provided for backward compatibility, Chart and Chart.Controller have been merged, * the "instance" still need to be defined since it might be called from plugins. * @prop Chart#chart * @deprecated since version 2.6.0 * @todo remove at version 3 * @private */ me.chart = me; me.controller = me; // chart.chart.controller #inception
// Add the chart instance to the global namespace Chart.instances[me.id] = me;
// Define alias to the config data: `chart.data === chart.config.data` Object.defineProperty(me, 'data', { get: function() { return me.config.data; }, set: function(value) { me.config.data = value; } });
if (!context || !canvas) { // The given item is not a compatible context2d element, let's return before finalizing // the chart initialization but after setting basic chart / controller properties that // can help to figure out that the chart is not valid (e.g chart.canvas !== null); // https://github.com/chartjs/Chart.js/issues/2807 console.error("Failed to create chart: can't acquire context from the given item"); return; }
me.initialize(); me.update(); },
/** * @private */ initialize: function() { var me = this;
// Before init plugin notification core_plugins.notify(me, 'beforeInit');
helpers$1.retinaScale(me, me.options.devicePixelRatio);
me.bindEvents();
if (me.options.responsive) { // Initial resize before chart draws (must be silent to preserve initial animations). me.resize(true); }
// Make sure scales have IDs and are built before we build any controllers. me.ensureScalesHaveIDs(); me.buildOrUpdateScales(); me.initToolTip();
// After init plugin notification core_plugins.notify(me, 'afterInit');
return me; },
clear: function() { helpers$1.canvas.clear(this); return this; },
stop: function() { // Stops any current animation loop occurring core_animations.cancelAnimation(this); return this; },
resize: function(silent) { var me = this; var options = me.options; var canvas = me.canvas; var aspectRatio = (options.maintainAspectRatio && me.aspectRatio) || null;
// the canvas render width and height will be casted to integers so make sure that // the canvas display style uses the same integer values to avoid blurring effect.
// Set to 0 instead of canvas.size because the size defaults to 300x150 if the element is collapsed var newWidth = Math.max(0, Math.floor(helpers$1.getMaximumWidth(canvas))); var newHeight = Math.max(0, Math.floor(aspectRatio ? newWidth / aspectRatio : helpers$1.getMaximumHeight(canvas)));
if (me.width === newWidth && me.height === newHeight) { return; }
canvas.width = me.width = newWidth; canvas.height = me.height = newHeight; canvas.style.width = newWidth + 'px'; canvas.style.height = newHeight + 'px';
helpers$1.retinaScale(me, options.devicePixelRatio);
if (!silent) { // Notify any plugins about the resize var newSize = {width: newWidth, height: newHeight}; core_plugins.notify(me, 'resize', [newSize]);
// Notify of resize if (options.onResize) { options.onResize(me, newSize); }
me.stop(); me.update({ duration: options.responsiveAnimationDuration }); } },
ensureScalesHaveIDs: function() { var options = this.options; var scalesOptions = options.scales || {}; var scaleOptions = options.scale;
helpers$1.each(scalesOptions.xAxes, function(xAxisOptions, index) { xAxisOptions.id = xAxisOptions.id || ('x-axis-' + index); });
helpers$1.each(scalesOptions.yAxes, function(yAxisOptions, index) { yAxisOptions.id = yAxisOptions.id || ('y-axis-' + index); });
if (scaleOptions) { scaleOptions.id = scaleOptions.id || 'scale'; } },
/** * Builds a map of scale ID to scale object for future lookup. */ buildOrUpdateScales: function() { var me = this; var options = me.options; var scales = me.scales || {}; var items = []; var updated = Object.keys(scales).reduce(function(obj, id) { obj[id] = false; return obj; }, {});
if (options.scales) { items = items.concat( (options.scales.xAxes || []).map(function(xAxisOptions) { return {options: xAxisOptions, dtype: 'category', dposition: 'bottom'}; }), (options.scales.yAxes || []).map(function(yAxisOptions) { return {options: yAxisOptions, dtype: 'linear', dposition: 'left'}; }) ); }
if (options.scale) { items.push({ options: options.scale, dtype: 'radialLinear', isDefault: true, dposition: 'chartArea' }); }
helpers$1.each(items, function(item) { var scaleOptions = item.options; var id = scaleOptions.id; var scaleType = valueOrDefault$8(scaleOptions.type, item.dtype);
if (positionIsHorizontal(scaleOptions.position) !== positionIsHorizontal(item.dposition)) { scaleOptions.position = item.dposition; }
updated[id] = true; var scale = null; if (id in scales && scales[id].type === scaleType) { scale = scales[id]; scale.options = scaleOptions; scale.ctx = me.ctx; scale.chart = me; } else { var scaleClass = core_scaleService.getScaleConstructor(scaleType); if (!scaleClass) { return; } scale = new scaleClass({ id: id, type: scaleType, options: scaleOptions, ctx: me.ctx, chart: me }); scales[scale.id] = scale; }
scale.mergeTicksOptions();
// TODO(SB): I think we should be able to remove this custom case (options.scale) // and consider it as a regular scale part of the "scales"" map only! This would // make the logic easier and remove some useless? custom code. if (item.isDefault) { me.scale = scale; } }); // clear up discarded scales helpers$1.each(updated, function(hasUpdated, id) { if (!hasUpdated) { delete scales[id]; } });
me.scales = scales;
core_scaleService.addScalesToLayout(this); },
buildOrUpdateControllers: function() { var me = this; var newControllers = [];
helpers$1.each(me.data.datasets, function(dataset, datasetIndex) { var meta = me.getDatasetMeta(datasetIndex); var type = dataset.type || me.config.type;
if (meta.type && meta.type !== type) { me.destroyDatasetMeta(datasetIndex); meta = me.getDatasetMeta(datasetIndex); } meta.type = type;
if (meta.controller) { meta.controller.updateIndex(datasetIndex); meta.controller.linkScales(); } else { var ControllerClass = controllers[meta.type]; if (ControllerClass === undefined) { throw new Error('"' + meta.type + '" is not a chart type.'); }
meta.controller = new ControllerClass(me, datasetIndex); newControllers.push(meta.controller); } }, me);
return newControllers; },
/** * Reset the elements of all datasets * @private */ resetElements: function() { var me = this; helpers$1.each(me.data.datasets, function(dataset, datasetIndex) { me.getDatasetMeta(datasetIndex).controller.reset(); }, me); },
/** * Resets the chart back to it's state before the initial animation */ reset: function() { this.resetElements(); this.tooltip.initialize(); },
update: function(config) { var me = this;
if (!config || typeof config !== 'object') { // backwards compatibility config = { duration: config, lazy: arguments[1] }; }
updateConfig(me);
// plugins options references might have change, let's invalidate the cache // https://github.com/chartjs/Chart.js/issues/5111#issuecomment-355934167 core_plugins._invalidate(me);
if (core_plugins.notify(me, 'beforeUpdate') === false) { return; }
// In case the entire data object changed me.tooltip._data = me.data;
// Make sure dataset controllers are updated and new controllers are reset var newControllers = me.buildOrUpdateControllers();
// Make sure all dataset controllers have correct meta data counts helpers$1.each(me.data.datasets, function(dataset, datasetIndex) { me.getDatasetMeta(datasetIndex).controller.buildOrUpdateElements(); }, me);
me.updateLayout();
// Can only reset the new controllers after the scales have been updated if (me.options.animation && me.options.animation.duration) { helpers$1.each(newControllers, function(controller) { controller.reset(); }); }
me.updateDatasets();
// Need to reset tooltip in case it is displayed with elements that are removed // after update. me.tooltip.initialize();
// Last active contains items that were previously in the tooltip. // When we reset the tooltip, we need to clear it me.lastActive = [];
// Do this before render so that any plugins that need final scale updates can use it core_plugins.notify(me, 'afterUpdate');
if (me._bufferedRender) { me._bufferedRequest = { duration: config.duration, easing: config.easing, lazy: config.lazy }; } else { me.render(config); } },
/** * Updates the chart layout unless a plugin returns `false` to the `beforeLayout` * hook, in which case, plugins will not be called on `afterLayout`. * @private */ updateLayout: function() { var me = this;
if (core_plugins.notify(me, 'beforeLayout') === false) { return; }
core_layouts.update(this, this.width, this.height);
/** * Provided for backward compatibility, use `afterLayout` instead. * @method IPlugin#afterScaleUpdate * @deprecated since version 2.5.0 * @todo remove at version 3 * @private */ core_plugins.notify(me, 'afterScaleUpdate'); core_plugins.notify(me, 'afterLayout'); },
/** * Updates all datasets unless a plugin returns `false` to the `beforeDatasetsUpdate` * hook, in which case, plugins will not be called on `afterDatasetsUpdate`. * @private */ updateDatasets: function() { var me = this;
if (core_plugins.notify(me, 'beforeDatasetsUpdate') === false) { return; }
for (var i = 0, ilen = me.data.datasets.length; i < ilen; ++i) { me.updateDataset(i); }
core_plugins.notify(me, 'afterDatasetsUpdate'); },
/** * Updates dataset at index unless a plugin returns `false` to the `beforeDatasetUpdate` * hook, in which case, plugins will not be called on `afterDatasetUpdate`. * @private */ updateDataset: function(index) { var me = this; var meta = me.getDatasetMeta(index); var args = { meta: meta, index: index };
if (core_plugins.notify(me, 'beforeDatasetUpdate', [args]) === false) { return; }
meta.controller.update();
core_plugins.notify(me, 'afterDatasetUpdate', [args]); },
render: function(config) { var me = this;
if (!config || typeof config !== 'object') { // backwards compatibility config = { duration: config, lazy: arguments[1] }; }
var animationOptions = me.options.animation; var duration = valueOrDefault$8(config.duration, animationOptions && animationOptions.duration); var lazy = config.lazy;
if (core_plugins.notify(me, 'beforeRender') === false) { return; }
var onComplete = function(animation) { core_plugins.notify(me, 'afterRender'); helpers$1.callback(animationOptions && animationOptions.onComplete, [animation], me); };
if (animationOptions && duration) { var animation = new core_animation({ numSteps: duration / 16.66, // 60 fps easing: config.easing || animationOptions.easing,
render: function(chart, animationObject) { var easingFunction = helpers$1.easing.effects[animationObject.easing]; var currentStep = animationObject.currentStep; var stepDecimal = currentStep / animationObject.numSteps;
chart.draw(easingFunction(stepDecimal), stepDecimal, currentStep); },
onAnimationProgress: animationOptions.onProgress, onAnimationComplete: onComplete });
core_animations.addAnimation(me, animation, duration, lazy); } else { me.draw();
// See https://github.com/chartjs/Chart.js/issues/3781 onComplete(new core_animation({numSteps: 0, chart: me})); }
return me; },
draw: function(easingValue) { var me = this;
me.clear();
if (helpers$1.isNullOrUndef(easingValue)) { easingValue = 1; }
me.transition(easingValue);
if (me.width <= 0 || me.height <= 0) { return; }
if (core_plugins.notify(me, 'beforeDraw', [easingValue]) === false) { return; }
// Draw all the scales helpers$1.each(me.boxes, function(box) { box.draw(me.chartArea); }, me);
me.drawDatasets(easingValue); me._drawTooltip(easingValue);
core_plugins.notify(me, 'afterDraw', [easingValue]); },
/** * @private */ transition: function(easingValue) { var me = this;
for (var i = 0, ilen = (me.data.datasets || []).length; i < ilen; ++i) { if (me.isDatasetVisible(i)) { me.getDatasetMeta(i).controller.transition(easingValue); } }
me.tooltip.transition(easingValue); },
/** * Draws all datasets unless a plugin returns `false` to the `beforeDatasetsDraw` * hook, in which case, plugins will not be called on `afterDatasetsDraw`. * @private */ drawDatasets: function(easingValue) { var me = this;
if (core_plugins.notify(me, 'beforeDatasetsDraw', [easingValue]) === false) { return; }
// Draw datasets reversed to support proper line stacking for (var i = (me.data.datasets || []).length - 1; i >= 0; --i) { if (me.isDatasetVisible(i)) { me.drawDataset(i, easingValue); } }
core_plugins.notify(me, 'afterDatasetsDraw', [easingValue]); },
/** * Draws dataset at index unless a plugin returns `false` to the `beforeDatasetDraw` * hook, in which case, plugins will not be called on `afterDatasetDraw`. * @private */ drawDataset: function(index, easingValue) { var me = this; var meta = me.getDatasetMeta(index); var args = { meta: meta, index: index, easingValue: easingValue };
if (core_plugins.notify(me, 'beforeDatasetDraw', [args]) === false) { return; }
meta.controller.draw(easingValue);
core_plugins.notify(me, 'afterDatasetDraw', [args]); },
/** * Draws tooltip unless a plugin returns `false` to the `beforeTooltipDraw` * hook, in which case, plugins will not be called on `afterTooltipDraw`. * @private */ _drawTooltip: function(easingValue) { var me = this; var tooltip = me.tooltip; var args = { tooltip: tooltip, easingValue: easingValue };
if (core_plugins.notify(me, 'beforeTooltipDraw', [args]) === false) { return; }
tooltip.draw();
core_plugins.notify(me, 'afterTooltipDraw', [args]); },
/** * Get the single element that was clicked on * @return An object containing the dataset index and element index of the matching element. Also contains the rectangle that was draw */ getElementAtEvent: function(e) { return core_interaction.modes.single(this, e); },
getElementsAtEvent: function(e) { return core_interaction.modes.label(this, e, {intersect: true}); },
getElementsAtXAxis: function(e) { return core_interaction.modes['x-axis'](this, e, {intersect: true}); },
getElementsAtEventForMode: function(e, mode, options) { var method = core_interaction.modes[mode]; if (typeof method === 'function') { return method(this, e, options); }
return []; },
getDatasetAtEvent: function(e) { return core_interaction.modes.dataset(this, e, {intersect: true}); },
getDatasetMeta: function(datasetIndex) { var me = this; var dataset = me.data.datasets[datasetIndex]; if (!dataset._meta) { dataset._meta = {}; }
var meta = dataset._meta[me.id]; if (!meta) { meta = dataset._meta[me.id] = { type: null, data: [], dataset: null, controller: null, hidden: null, // See isDatasetVisible() comment xAxisID: null, yAxisID: null }; }
return meta; },
getVisibleDatasetCount: function() { var count = 0; for (var i = 0, ilen = this.data.datasets.length; i < ilen; ++i) { if (this.isDatasetVisible(i)) { count++; } } return count; },
isDatasetVisible: function(datasetIndex) { var meta = this.getDatasetMeta(datasetIndex);
// meta.hidden is a per chart dataset hidden flag override with 3 states: if true or false, // the dataset.hidden value is ignored, else if null, the dataset hidden state is returned. return typeof meta.hidden === 'boolean' ? !meta.hidden : !this.data.datasets[datasetIndex].hidden; },
generateLegend: function() { return this.options.legendCallback(this); },
/** * @private */ destroyDatasetMeta: function(datasetIndex) { var id = this.id; var dataset = this.data.datasets[datasetIndex]; var meta = dataset._meta && dataset._meta[id];
if (meta) { meta.controller.destroy(); delete dataset._meta[id]; } },
destroy: function() { var me = this; var canvas = me.canvas; var i, ilen;
me.stop();
// dataset controllers need to cleanup associated data for (i = 0, ilen = me.data.datasets.length; i < ilen; ++i) { me.destroyDatasetMeta(i); }
if (canvas) { me.unbindEvents(); helpers$1.canvas.clear(me); platform.releaseContext(me.ctx); me.canvas = null; me.ctx = null; }
core_plugins.notify(me, 'destroy');
delete Chart.instances[me.id]; },
toBase64Image: function() { return this.canvas.toDataURL.apply(this.canvas, arguments); },
initToolTip: function() { var me = this; me.tooltip = new core_tooltip({ _chart: me, _chartInstance: me, // deprecated, backward compatibility _data: me.data, _options: me.options.tooltips }, me); },
/** * @private */ bindEvents: function() { var me = this; var listeners = me._listeners = {}; var listener = function() { me.eventHandler.apply(me, arguments); };
helpers$1.each(me.options.events, function(type) { platform.addEventListener(me, type, listener); listeners[type] = listener; });
// Elements used to detect size change should not be injected for non responsive charts. // See https://github.com/chartjs/Chart.js/issues/2210 if (me.options.responsive) { listener = function() { me.resize(); };
platform.addEventListener(me, 'resize', listener); listeners.resize = listener; } },
/** * @private */ unbindEvents: function() { var me = this; var listeners = me._listeners; if (!listeners) { return; }
delete me._listeners; helpers$1.each(listeners, function(listener, type) { platform.removeEventListener(me, type, listener); }); },
updateHoverStyle: function(elements, mode, enabled) { var method = enabled ? 'setHoverStyle' : 'removeHoverStyle'; var element, i, ilen;
for (i = 0, ilen = elements.length; i < ilen; ++i) { element = elements[i]; if (element) { this.getDatasetMeta(element._datasetIndex).controller[method](element); } } },
/** * @private */ eventHandler: function(e) { var me = this; var tooltip = me.tooltip;
if (core_plugins.notify(me, 'beforeEvent', [e]) === false) { return; }
// Buffer any update calls so that renders do not occur me._bufferedRender = true; me._bufferedRequest = null;
var changed = me.handleEvent(e); // for smooth tooltip animations issue #4989 // the tooltip should be the source of change // Animation check workaround: // tooltip._start will be null when tooltip isn't animating if (tooltip) { changed = tooltip._start ? tooltip.handleEvent(e) : changed | tooltip.handleEvent(e); }
core_plugins.notify(me, 'afterEvent', [e]);
var bufferedRequest = me._bufferedRequest; if (bufferedRequest) { // If we have an update that was triggered, we need to do a normal render me.render(bufferedRequest); } else if (changed && !me.animating) { // If entering, leaving, or changing elements, animate the change via pivot me.stop();
// We only need to render at this point. Updating will cause scales to be // recomputed generating flicker & using more memory than necessary. me.render({ duration: me.options.hover.animationDuration, lazy: true }); }
me._bufferedRender = false; me._bufferedRequest = null;
return me; },
/** * Handle an event * @private * @param {IEvent} event the event to handle * @return {boolean} true if the chart needs to re-render */ handleEvent: function(e) { var me = this; var options = me.options || {}; var hoverOptions = options.hover; var changed = false;
me.lastActive = me.lastActive || [];
// Find Active Elements for hover and tooltips if (e.type === 'mouseout') { me.active = []; } else { me.active = me.getElementsAtEventForMode(e, hoverOptions.mode, hoverOptions); }
// Invoke onHover hook // Need to call with native event here to not break backwards compatibility helpers$1.callback(options.onHover || options.hover.onHover, [e.native, me.active], me);
if (e.type === 'mouseup' || e.type === 'click') { if (options.onClick) { // Use e.native here for backwards compatibility options.onClick.call(me, e.native, me.active); } }
// Remove styling for last active (even if it may still be active) if (me.lastActive.length) { me.updateHoverStyle(me.lastActive, hoverOptions.mode, false); }
// Built in hover styling if (me.active.length && hoverOptions.mode) { me.updateHoverStyle(me.active, hoverOptions.mode, true); }
changed = !helpers$1.arrayEquals(me.active, me.lastActive);
// Remember Last Actives me.lastActive = me.active;
return changed; } });
/**
* NOTE(SB) We actually don't use this container anymore but we need to keep it * for backward compatibility. Though, it can still be useful for plugins that * would need to work on multiple charts?! */
Chart.instances = {};
var core_controller = Chart;
// DEPRECATIONS
/**
* Provided for backward compatibility, use Chart instead. * @class Chart.Controller * @deprecated since version 2.6 * @todo remove at version 3 * @private */
Chart.Controller = Chart;
/**
* Provided for backward compatibility, not available anymore. * @namespace Chart * @deprecated since version 2.8 * @todo remove at version 3 * @private */
Chart.types = {};
/**
* Provided for backward compatibility, not available anymore. * @namespace Chart.helpers.configMerge * @deprecated since version 2.8.0 * @todo remove at version 3 * @private */
helpers$1.configMerge = mergeConfig;
/**
* Provided for backward compatibility, not available anymore. * @namespace Chart.helpers.scaleMerge * @deprecated since version 2.8.0 * @todo remove at version 3 * @private */
helpers$1.scaleMerge = mergeScaleConfig;
var core_helpers = function() {
// -- Basic js utility methods
helpers$1.where = function(collection, filterCallback) { if (helpers$1.isArray(collection) && Array.prototype.filter) { return collection.filter(filterCallback); } var filtered = [];
helpers$1.each(collection, function(item) { if (filterCallback(item)) { filtered.push(item); } });
return filtered; }; helpers$1.findIndex = Array.prototype.findIndex ? function(array, callback, scope) { return array.findIndex(callback, scope); } : function(array, callback, scope) { scope = scope === undefined ? array : scope; for (var i = 0, ilen = array.length; i < ilen; ++i) { if (callback.call(scope, array[i], i, array)) { return i; } } return -1; }; helpers$1.findNextWhere = function(arrayToSearch, filterCallback, startIndex) { // Default to start of the array if (helpers$1.isNullOrUndef(startIndex)) { startIndex = -1; } for (var i = startIndex + 1; i < arrayToSearch.length; i++) { var currentItem = arrayToSearch[i]; if (filterCallback(currentItem)) { return currentItem; } } }; helpers$1.findPreviousWhere = function(arrayToSearch, filterCallback, startIndex) { // Default to end of the array if (helpers$1.isNullOrUndef(startIndex)) { startIndex = arrayToSearch.length; } for (var i = startIndex - 1; i >= 0; i--) { var currentItem = arrayToSearch[i]; if (filterCallback(currentItem)) { return currentItem; } } };
// -- Math methods helpers$1.isNumber = function(n) { return !isNaN(parseFloat(n)) && isFinite(n); }; helpers$1.almostEquals = function(x, y, epsilon) { return Math.abs(x - y) < epsilon; }; helpers$1.almostWhole = function(x, epsilon) { var rounded = Math.round(x); return (((rounded - epsilon) < x) && ((rounded + epsilon) > x)); }; helpers$1.max = function(array) { return array.reduce(function(max, value) { if (!isNaN(value)) { return Math.max(max, value); } return max; }, Number.NEGATIVE_INFINITY); }; helpers$1.min = function(array) { return array.reduce(function(min, value) { if (!isNaN(value)) { return Math.min(min, value); } return min; }, Number.POSITIVE_INFINITY); }; helpers$1.sign = Math.sign ? function(x) { return Math.sign(x); } : function(x) { x = +x; // convert to a number if (x === 0 || isNaN(x)) { return x; } return x > 0 ? 1 : -1; }; helpers$1.log10 = Math.log10 ? function(x) { return Math.log10(x); } : function(x) { var exponent = Math.log(x) * Math.LOG10E; // Math.LOG10E = 1 / Math.LN10. // Check for whole powers of 10, // which due to floating point rounding error should be corrected. var powerOf10 = Math.round(exponent); var isPowerOf10 = x === Math.pow(10, powerOf10);
return isPowerOf10 ? powerOf10 : exponent; }; helpers$1.toRadians = function(degrees) { return degrees * (Math.PI / 180); }; helpers$1.toDegrees = function(radians) { return radians * (180 / Math.PI); };
/** * Returns the number of decimal places * i.e. the number of digits after the decimal point, of the value of this Number. * @param {number} x - A number. * @returns {number} The number of decimal places. * @private */ helpers$1._decimalPlaces = function(x) { if (!helpers$1.isFinite(x)) { return; } var e = 1; var 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. helpers$1.getAngleFromPoint = function(centrePoint, anglePoint) { var distanceFromXCenter = anglePoint.x - centrePoint.x; var distanceFromYCenter = anglePoint.y - centrePoint.y; var radialDistanceFromCenter = Math.sqrt(distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter);
var angle = Math.atan2(distanceFromYCenter, distanceFromXCenter);
if (angle < (-0.5 * Math.PI)) { angle += 2.0 * Math.PI; // make sure the returned angle is in the range of (-PI/2, 3PI/2] }
return { angle: angle, distance: radialDistanceFromCenter }; }; helpers$1.distanceBetweenPoints = function(pt1, pt2) { return Math.sqrt(Math.pow(pt2.x - pt1.x, 2) + Math.pow(pt2.y - pt1.y, 2)); };
/** * Provided for backward compatibility, not available anymore * @function Chart.helpers.aliasPixel * @deprecated since version 2.8.0 * @todo remove at version 3 */ helpers$1.aliasPixel = function(pixelWidth) { return (pixelWidth % 2 === 0) ? 0 : 0.5; };
/** * Returns the aligned pixel value to avoid anti-aliasing blur * @param {Chart} chart - The chart instance. * @param {number} pixel - A pixel value. * @param {number} width - The width of the element. * @returns {number} The aligned pixel value. * @private */ helpers$1._alignPixel = function(chart, pixel, width) { var devicePixelRatio = chart.currentDevicePixelRatio; var halfWidth = width / 2; return Math.round((pixel - halfWidth) * devicePixelRatio) / devicePixelRatio + halfWidth; };
helpers$1.splineCurve = function(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
var previous = firstPoint.skip ? middlePoint : firstPoint; var current = middlePoint; var next = afterPoint.skip ? middlePoint : afterPoint;
var d01 = Math.sqrt(Math.pow(current.x - previous.x, 2) + Math.pow(current.y - previous.y, 2)); var d12 = Math.sqrt(Math.pow(next.x - current.x, 2) + Math.pow(next.y - current.y, 2));
var s01 = d01 / (d01 + d12); var 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;
var fa = t * s01; // scaling factor for triangle Ta var 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) } }; }; helpers$1.EPSILON = Number.EPSILON || 1e-14; helpers$1.splineCurveMonotone = function(points) { // 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
var pointsWithTangents = (points || []).map(function(point) { return { model: point._model, deltaK: 0, mK: 0 }; });
// Calculate slopes (deltaK) and initialize tangents (mK) var pointsLen = pointsWithTangents.length; var i, pointBefore, pointCurrent, pointAfter; for (i = 0; i < pointsLen; ++i) { pointCurrent = pointsWithTangents[i]; if (pointCurrent.model.skip) { continue; }
pointBefore = i > 0 ? pointsWithTangents[i - 1] : null; pointAfter = i < pointsLen - 1 ? pointsWithTangents[i + 1] : null; if (pointAfter && !pointAfter.model.skip) { var slopeDeltaX = (pointAfter.model.x - pointCurrent.model.x);
// In the case of two points that appear at the same x pixel, slopeDeltaX is 0 pointCurrent.deltaK = slopeDeltaX !== 0 ? (pointAfter.model.y - pointCurrent.model.y) / slopeDeltaX : 0; }
if (!pointBefore || pointBefore.model.skip) { pointCurrent.mK = pointCurrent.deltaK; } else if (!pointAfter || pointAfter.model.skip) { pointCurrent.mK = pointBefore.deltaK; } else if (this.sign(pointBefore.deltaK) !== this.sign(pointCurrent.deltaK)) { pointCurrent.mK = 0; } else { pointCurrent.mK = (pointBefore.deltaK + pointCurrent.deltaK) / 2; } }
// Adjust tangents to ensure monotonic properties var alphaK, betaK, tauK, squaredMagnitude; for (i = 0; i < pointsLen - 1; ++i) { pointCurrent = pointsWithTangents[i]; pointAfter = pointsWithTangents[i + 1]; if (pointCurrent.model.skip || pointAfter.model.skip) { continue; }
if (helpers$1.almostEquals(pointCurrent.deltaK, 0, this.EPSILON)) { pointCurrent.mK = pointAfter.mK = 0; continue; }
alphaK = pointCurrent.mK / pointCurrent.deltaK; betaK = pointAfter.mK / pointCurrent.deltaK; squaredMagnitude = Math.pow(alphaK, 2) + Math.pow(betaK, 2); if (squaredMagnitude <= 9) { continue; }
tauK = 3 / Math.sqrt(squaredMagnitude); pointCurrent.mK = alphaK * tauK * pointCurrent.deltaK; pointAfter.mK = betaK * tauK * pointCurrent.deltaK; }
// Compute control points var deltaX; for (i = 0; i < pointsLen; ++i) { pointCurrent = pointsWithTangents[i]; if (pointCurrent.model.skip) { continue; }
pointBefore = i > 0 ? pointsWithTangents[i - 1] : null; pointAfter = i < pointsLen - 1 ? pointsWithTangents[i + 1] : null; if (pointBefore && !pointBefore.model.skip) { deltaX = (pointCurrent.model.x - pointBefore.model.x) / 3; pointCurrent.model.controlPointPreviousX = pointCurrent.model.x - deltaX; pointCurrent.model.controlPointPreviousY = pointCurrent.model.y - deltaX * pointCurrent.mK; } if (pointAfter && !pointAfter.model.skip) { deltaX = (pointAfter.model.x - pointCurrent.model.x) / 3; pointCurrent.model.controlPointNextX = pointCurrent.model.x + deltaX; pointCurrent.model.controlPointNextY = pointCurrent.model.y + deltaX * pointCurrent.mK; } } }; helpers$1.nextItem = function(collection, index, loop) { if (loop) { return index >= collection.length - 1 ? collection[0] : collection[index + 1]; } return index >= collection.length - 1 ? collection[collection.length - 1] : collection[index + 1]; }; helpers$1.previousItem = function(collection, index, loop) { if (loop) { return index <= 0 ? collection[collection.length - 1] : collection[index - 1]; } return index <= 0 ? collection[0] : collection[index - 1]; }; // Implementation of the nice number algorithm used in determining where axis labels will go helpers$1.niceNum = function(range, round) { var exponent = Math.floor(helpers$1.log10(range)); var fraction = range / Math.pow(10, exponent); var niceFraction;
if (round) { if (fraction < 1.5) { niceFraction = 1; } else if (fraction < 3) { niceFraction = 2; } else if (fraction < 7) { niceFraction = 5; } else { niceFraction = 10; } } else if (fraction <= 1.0) { niceFraction = 1; } else if (fraction <= 2) { niceFraction = 2; } else if (fraction <= 5) { niceFraction = 5; } else { niceFraction = 10; }
return niceFraction * Math.pow(10, exponent); }; // Request animation polyfill - https://www.paulirish.com/2011/requestanimationframe-for-smart-animating/ helpers$1.requestAnimFrame = (function() { if (typeof window === 'undefined') { return function(callback) { callback(); }; } return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(callback) { return window.setTimeout(callback, 1000 / 60); }; }()); // -- DOM methods helpers$1.getRelativePosition = function(evt, chart) { var mouseX, mouseY; var e = evt.originalEvent || evt; var canvas = evt.target || evt.srcElement; var boundingRect = canvas.getBoundingClientRect();
var touches = e.touches; if (touches && touches.length > 0) { mouseX = touches[0].clientX; mouseY = touches[0].clientY;
} else { mouseX = e.clientX; mouseY = e.clientY; }
// Scale mouse coordinates into canvas coordinates // by following the pattern laid out by 'jerryj' in the comments of // https://www.html5canvastutorials.com/advanced/html5-canvas-mouse-coordinates/ var paddingLeft = parseFloat(helpers$1.getStyle(canvas, 'padding-left')); var paddingTop = parseFloat(helpers$1.getStyle(canvas, 'padding-top')); var paddingRight = parseFloat(helpers$1.getStyle(canvas, 'padding-right')); var paddingBottom = parseFloat(helpers$1.getStyle(canvas, 'padding-bottom')); var width = boundingRect.right - boundingRect.left - paddingLeft - paddingRight; var height = boundingRect.bottom - boundingRect.top - paddingTop - paddingBottom;
// We divide by the current device pixel ratio, because the canvas is scaled up by that amount in each direction. However // the backend model is in unscaled coordinates. Since we are going to deal with our model coordinates, we go back here mouseX = Math.round((mouseX - boundingRect.left - paddingLeft) / (width) * canvas.width / chart.currentDevicePixelRatio); mouseY = Math.round((mouseY - boundingRect.top - paddingTop) / (height) * canvas.height / chart.currentDevicePixelRatio);
return { x: mouseX, y: mouseY };
};
// Private helper function to convert max-width/max-height values that may be percentages into a number function parseMaxStyle(styleValue, node, parentProperty) { var 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; }
/** * Returns if the given value contains an effective constraint. * @private */ function isConstrainedValue(value) { return value !== undefined && value !== null && value !== 'none'; }
/** * Returns the max width or height of the given DOM node in a cross-browser compatible fashion * @param {HTMLElement} domNode - the node to check the constraint on * @param {string} maxStyle - the style that defines the maximum for the direction we are using ('max-width' / 'max-height') * @param {string} percentageProperty - property of parent to use when calculating width as a percentage * @see {@link https://www.nathanaeljones.com/blog/2013/reading-max-width-cross-browser} */ function getConstraintDimension(domNode, maxStyle, percentageProperty) { var view = document.defaultView; var parentNode = helpers$1._getParentNode(domNode); var constrainedNode = view.getComputedStyle(domNode)[maxStyle]; var constrainedContainer = view.getComputedStyle(parentNode)[maxStyle]; var hasCNode = isConstrainedValue(constrainedNode); var hasCContainer = isConstrainedValue(constrainedContainer); var infinity = Number.POSITIVE_INFINITY;
if (hasCNode || hasCContainer) { return Math.min( hasCNode ? parseMaxStyle(constrainedNode, domNode, percentageProperty) : infinity, hasCContainer ? parseMaxStyle(constrainedContainer, parentNode, percentageProperty) : infinity); }
return 'none'; } // returns Number or undefined if no constraint helpers$1.getConstraintWidth = function(domNode) { return getConstraintDimension(domNode, 'max-width', 'clientWidth'); }; // returns Number or undefined if no constraint helpers$1.getConstraintHeight = function(domNode) { return getConstraintDimension(domNode, 'max-height', 'clientHeight'); }; /** * @private
*/
helpers$1._calculatePadding = function(container, padding, parentDimension) { padding = helpers$1.getStyle(container, padding);
return padding.indexOf('%') > -1 ? parentDimension * parseInt(padding, 10) / 100 : parseInt(padding, 10); }; /** * @private */ helpers$1._getParentNode = function(domNode) { var parent = domNode.parentNode; if (parent && parent.toString() === '[object ShadowRoot]') { parent = parent.host; } return parent; }; helpers$1.getMaximumWidth = function(domNode) { var container = helpers$1._getParentNode(domNode); if (!container) { return domNode.clientWidth; }
var clientWidth = container.clientWidth; var paddingLeft = helpers$1._calculatePadding(container, 'padding-left', clientWidth); var paddingRight = helpers$1._calculatePadding(container, 'padding-right', clientWidth);
var w = clientWidth - paddingLeft - paddingRight; var cw = helpers$1.getConstraintWidth(domNode); return isNaN(cw) ? w : Math.min(w, cw); }; helpers$1.getMaximumHeight = function(domNode) { var container = helpers$1._getParentNode(domNode); if (!container) { return domNode.clientHeight; }
var clientHeight = container.clientHeight; var paddingTop = helpers$1._calculatePadding(container, 'padding-top', clientHeight); var paddingBottom = helpers$1._calculatePadding(container, 'padding-bottom', clientHeight);
var h = clientHeight - paddingTop - paddingBottom; var ch = helpers$1.getConstraintHeight(domNode); return isNaN(ch) ? h : Math.min(h, ch); }; helpers$1.getStyle = function(el, property) { return el.currentStyle ? el.currentStyle[property] : document.defaultView.getComputedStyle(el, null).getPropertyValue(property); }; helpers$1.retinaScale = function(chart, forceRatio) { var pixelRatio = chart.currentDevicePixelRatio = forceRatio || (typeof window !== 'undefined' && window.devicePixelRatio) || 1; if (pixelRatio === 1) { return; }
var canvas = chart.canvas; var height = chart.height; var width = chart.width;
canvas.height = height * pixelRatio; canvas.width = width * pixelRatio; chart.ctx.scale(pixelRatio, pixelRatio);
// 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.height && !canvas.style.width) { canvas.style.height = height + 'px'; canvas.style.width = width + 'px'; } }; // -- Canvas methods helpers$1.fontString = function(pixelSize, fontStyle, fontFamily) { return fontStyle + ' ' + pixelSize + 'px ' + fontFamily; }; helpers$1.longestText = function(ctx, font, arrayOfThings, cache) { cache = cache || {}; var data = cache.data = cache.data || {}; var gc = cache.garbageCollect = cache.garbageCollect || [];
if (cache.font !== font) { data = cache.data = {}; gc = cache.garbageCollect = []; cache.font = font; }
ctx.font = font; var longest = 0; helpers$1.each(arrayOfThings, function(thing) { // Undefined strings and arrays should not be measured if (thing !== undefined && thing !== null && helpers$1.isArray(thing) !== true) { longest = helpers$1.measureText(ctx, data, gc, longest, thing); } else if (helpers$1.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? helpers$1.each(thing, function(nestedThing) { // Undefined strings and arrays should not be measured if (nestedThing !== undefined && nestedThing !== null && !helpers$1.isArray(nestedThing)) { longest = helpers$1.measureText(ctx, data, gc, longest, nestedThing); } }); } });
var gcLen = gc.length / 2; if (gcLen > arrayOfThings.length) { for (var i = 0; i < gcLen; i++) { delete data[gc[i]]; } gc.splice(0, gcLen); } return longest; }; helpers$1.measureText = function(ctx, data, gc, longest, string) { var textWidth = data[string]; if (!textWidth) { textWidth = data[string] = ctx.measureText(string).width; gc.push(string); } if (textWidth > longest) { longest = textWidth; } return longest; }; helpers$1.numberOfLabelLines = function(arrayOfThings) { var numberOfLines = 1; helpers$1.each(arrayOfThings, function(thing) { if (helpers$1.isArray(thing)) { if (thing.length > numberOfLines) { numberOfLines = thing.length; } } }); return numberOfLines; };
helpers$1.color = !chartjsColor ? function(value) { console.error('Color.js not found!'); return value; } : function(value) { /* global CanvasGradient */ if (value instanceof CanvasGradient) { value = core_defaults.global.defaultColor; }
return chartjsColor(value); };
helpers$1.getHoverColor = function(colorValue) { /* global CanvasPattern */ return (colorValue instanceof CanvasPattern || colorValue instanceof CanvasGradient) ? colorValue : helpers$1.color(colorValue).saturate(0.5).darken(0.1).rgbString(); }; };
function abstract() { throw new Error( 'This method is not implemented: either no adapter can ' + 'be found or an incomplete integration was provided.' ); }
/**
* Date adapter (current used by the time scale) * @namespace Chart._adapters._date * @memberof Chart._adapters * @private */
/**
* Currently supported unit string values.
* @typedef {('millisecond'|'second'|'minute'|'hour'|'day'|'week'|'month'|'quarter'|'year')}
* @memberof Chart._adapters._date
* @name Unit
*/
/**
* @class */
function DateAdapter(options) { this.options = options || {}; }
helpers$1.extend(DateAdapter.prototype, /** @lends DateAdapter */ { /** * Returns a map of time formats for the supported formatting units defined * in Unit as well as 'datetime' representing a detailed date/time string. * @returns Template:String: string */ formats: abstract,
/** * Parses the given `value` and return the associated timestamp. * @param {any} value - the value to parse (usually comes from the data) * @param {string} [format] - the expected data format * @returns {(number|null)} * @function */ parse: abstract,
/** * Returns the formatted date in the specified `format` for a given `timestamp`. * @param {number} timestamp - the timestamp to format * @param {string} format - the date/time token * @return {string} * @function */ format: abstract,
/** * Adds the specified `amount` of `unit` to the given `timestamp`. * @param {number} timestamp - the input timestamp * @param {number} amount - the amount to add * @param {Unit} unit - the unit as string * @return {number} * @function */ add: abstract,
/** * Returns the number of `unit` between the given timestamps. * @param {number} max - the input timestamp (reference) * @param {number} min - the timestamp to substract * @param {Unit} unit - the unit as string * @return {number} * @function */ diff: abstract,
/** * Returns start of `unit` for the given `timestamp`. * @param {number} timestamp - the input timestamp * @param {Unit} unit - the unit as string * @param {number} [weekday] - the ISO day of the week with 1 being Monday * and 7 being Sunday (only needed if param *unit* is `isoWeek`). * @function */ startOf: abstract,
/** * Returns end of `unit` for the given `timestamp`. * @param {number} timestamp - the input timestamp * @param {Unit} unit - the unit as string * @function */ endOf: abstract,
// DEPRECATIONS
/** * Provided for backward compatibility for scale.getValueForPixel(), * this method should be overridden only by the moment adapter. * @deprecated since version 2.8.0 * @todo remove at version 3 * @private */ _create: function(value) { return value; } });
DateAdapter.override = function(members) { helpers$1.extend(DateAdapter.prototype, members); };
var _date = DateAdapter;
var core_adapters = { _date: _date };
/**
* Namespace to hold static tick generation functions * @namespace Chart.Ticks */
var core_ticks = { /** * Namespace to hold formatters for different types of ticks * @namespace Chart.Ticks.formatters */ formatters: { /** * Formatter for value labels * @method Chart.Ticks.formatters.values * @param value the value to display * @return {string|string[]} the label to display */ values: function(value) { return helpers$1.isArray(value) ? value : + value; },
/** * Formatter for linear numeric ticks * @method Chart.Ticks.formatters.linear * @param tickValue {number} the value to be formatted * @param index {number} the position of the tickValue parameter in the ticks array * @param ticks {number[]} the list of ticks being converted * @return {string} string representation of the tickValue parameter */ linear: function(tickValue, index, ticks) { // If we have lots of ticks, don't use the ones var delta = ticks.length > 3 ? ticks[2] - ticks[1] : ticks[1] - ticks[0];
// If we have a number like 2.5 as the delta, figure out how many decimal places we need if (Math.abs(delta) > 1) { if (tickValue !== Math.floor(tickValue)) { // not an integer delta = tickValue - Math.floor(tickValue); } }
var logDelta = helpers$1.log10(Math.abs(delta)); var tickString = ;
if (tickValue !== 0) { var maxTick = Math.max(Math.abs(ticks[0]), Math.abs(ticks[ticks.length - 1])); if (maxTick < 1e-4) { // all ticks are small numbers; use scientific notation var logTick = helpers$1.log10(Math.abs(tickValue)); tickString = tickValue.toExponential(Math.floor(logTick) - Math.floor(logDelta)); } else { var numDecimal = -1 * Math.floor(logDelta); numDecimal = Math.max(Math.min(numDecimal, 20), 0); // toFixed has a max of 20 decimal places tickString = tickValue.toFixed(numDecimal); } } else { tickString = '0'; // never show decimal places for 0 }
return tickString; },
logarithmic: function(tickValue, index, ticks) { var remain = tickValue / (Math.pow(10, Math.floor(helpers$1.log10(tickValue))));
if (tickValue === 0) { return '0'; } else if (remain === 1 || remain === 2 || remain === 5 || index === 0 || index === ticks.length - 1) { return tickValue.toExponential(); } return ; } } };
var valueOrDefault$9 = helpers$1.valueOrDefault; var valueAtIndexOrDefault = helpers$1.valueAtIndexOrDefault;
core_defaults._set('scale', { display: true, position: 'left', offset: false,
// grid line settings gridLines: { display: true, color: 'rgba(0, 0, 0, 0.1)', lineWidth: 1, drawBorder: true, drawOnChartArea: true, drawTicks: true, tickMarkLength: 10, zeroLineWidth: 1, zeroLineColor: 'rgba(0,0,0,0.25)', zeroLineBorderDash: [], zeroLineBorderDashOffset: 0.0, offsetGridLines: false, borderDash: [], borderDashOffset: 0.0 },
// scale label scaleLabel: { // display property display: false,
// actual label labelString: ,
// top/bottom padding padding: { top: 4, bottom: 4 } },
// label settings ticks: { beginAtZero: false, minRotation: 0, maxRotation: 50, mirror: false, padding: 0, reverse: false, display: true, autoSkip: true, autoSkipPadding: 0, labelOffset: 0, // We pass through arrays to be rendered as multiline labels, we convert Others to strings here. callback: core_ticks.formatters.values, minor: {}, major: {} } });
function labelsFromTicks(ticks) { var labels = []; var i, ilen;
for (i = 0, ilen = ticks.length; i < ilen; ++i) { labels.push(ticks[i].label); }
return labels; }
function getPixelForGridLine(scale, index, offsetGridLines) { var lineValue = scale.getPixelForTick(index);
if (offsetGridLines) { if (scale.getTicks().length === 1) { lineValue -= scale.isHorizontal() ? Math.max(lineValue - scale.left, scale.right - lineValue) : Math.max(lineValue - scale.top, scale.bottom - lineValue); } else if (index === 0) { lineValue -= (scale.getPixelForTick(1) - lineValue) / 2; } else { lineValue -= (lineValue - scale.getPixelForTick(index - 1)) / 2; } } return lineValue; }
function computeTextSize(context, tick, font) { return helpers$1.isArray(tick) ? helpers$1.longestText(context, font, tick) : context.measureText(tick).width; }
var core_scale = core_element.extend({ /** * Get the padding needed for the scale * @method getPadding * @private * @returns {Padding} the necessary padding */ getPadding: function() { var me = this; return { left: me.paddingLeft || 0, top: me.paddingTop || 0, right: me.paddingRight || 0, bottom: me.paddingBottom || 0 }; },
/** * Returns the scale tick objects ({label, major}) * @since 2.7 */ getTicks: function() { return this._ticks; },
// These methods are ordered by lifecyle. Utilities then follow. // Any function defined here is inherited by all scale types. // Any function can be extended by the scale type
mergeTicksOptions: function() { var ticks = this.options.ticks; if (ticks.minor === false) { ticks.minor = { display: false }; } if (ticks.major === false) { ticks.major = { display: false }; } for (var key in ticks) { if (key !== 'major' && key !== 'minor') { if (typeof ticks.minor[key] === 'undefined') { ticks.minor[key] = ticks[key]; } if (typeof ticks.major[key] === 'undefined') { ticks.major[key] = ticks[key]; } } } }, beforeUpdate: function() { helpers$1.callback(this.options.beforeUpdate, [this]); },
update: function(maxWidth, maxHeight, margins) { var me = this; var i, ilen, labels, label, ticks, tick;
// Update Lifecycle - Probably don't want to ever extend or overwrite this function ;) me.beforeUpdate();
// Absorb the master measurements me.maxWidth = maxWidth; me.maxHeight = maxHeight; me.margins = helpers$1.extend({ left: 0, right: 0, top: 0, bottom: 0 }, margins);
me._maxLabelLines = 0; me.longestLabelWidth = 0; me.longestTextCache = me.longestTextCache || {};
// Dimensions me.beforeSetDimensions(); me.setDimensions(); me.afterSetDimensions();
// Data min/max me.beforeDataLimits(); me.determineDataLimits(); me.afterDataLimits();
// Ticks - `this.ticks` is now DEPRECATED! // Internal ticks are now stored as objects in the PRIVATE `this._ticks` member // and must not be accessed directly from outside this class. `this.ticks` being // around for long time and not marked as private, we can't change its structure // without unexpected breaking changes. If you need to access the scale ticks, // use scale.getTicks() instead.
me.beforeBuildTicks();
// New implementations should return an array of objects but for BACKWARD COMPAT, // we still support no return (`this.ticks` internally set by calling this method). ticks = me.buildTicks() || [];
// Allow modification of ticks in callback. ticks = me.afterBuildTicks(ticks) || ticks;
me.beforeTickToLabelConversion();
// New implementations should return the formatted tick labels but for BACKWARD // COMPAT, we still support no return (`this.ticks` internally changed by calling // this method and supposed to contain only string values). labels = me.convertTicksToLabels(ticks) || me.ticks;
me.afterTickToLabelConversion();
me.ticks = labels; // BACKWARD COMPATIBILITY
// IMPORTANT: from this point, we consider that `this.ticks` will NEVER change!
// BACKWARD COMPAT: synchronize `_ticks` with labels (so potentially `this.ticks`) for (i = 0, ilen = labels.length; i < ilen; ++i) { label = labels[i]; tick = ticks[i]; if (!tick) { ticks.push(tick = { label: label, major: false }); } else { tick.label = label; } }
me._ticks = ticks;
// Tick Rotation me.beforeCalculateTickRotation(); me.calculateTickRotation(); me.afterCalculateTickRotation(); // Fit me.beforeFit(); me.fit(); me.afterFit(); // me.afterUpdate();
return me.minSize;
}, afterUpdate: function() { helpers$1.callback(this.options.afterUpdate, [this]); },
//
beforeSetDimensions: function() { helpers$1.callback(this.options.beforeSetDimensions, [this]); }, setDimensions: function() { var me = this; // Set the unconstrained dimension before label rotation if (me.isHorizontal()) { // Reset position before calculating rotation me.width = me.maxWidth; me.left = 0; me.right = me.width; } else { me.height = me.maxHeight;
// Reset position before calculating rotation me.top = 0; me.bottom = me.height; }
// Reset padding me.paddingLeft = 0; me.paddingTop = 0; me.paddingRight = 0; me.paddingBottom = 0; }, afterSetDimensions: function() { helpers$1.callback(this.options.afterSetDimensions, [this]); },
// Data limits beforeDataLimits: function() { helpers$1.callback(this.options.beforeDataLimits, [this]); }, determineDataLimits: helpers$1.noop, afterDataLimits: function() { helpers$1.callback(this.options.afterDataLimits, [this]); },
// beforeBuildTicks: function() { helpers$1.callback(this.options.beforeBuildTicks, [this]); }, buildTicks: helpers$1.noop, afterBuildTicks: function(ticks) { var me = this; // ticks is empty for old axis implementations here if (helpers$1.isArray(ticks) && ticks.length) { return helpers$1.callback(me.options.afterBuildTicks, [me, ticks]); } // Support old implementations (that modified `this.ticks` directly in buildTicks) me.ticks = helpers$1.callback(me.options.afterBuildTicks, [me, me.ticks]) || me.ticks; return ticks; },
beforeTickToLabelConversion: function() { helpers$1.callback(this.options.beforeTickToLabelConversion, [this]); }, convertTicksToLabels: function() { var me = this; // Convert ticks to strings var tickOpts = me.options.ticks; me.ticks = me.ticks.map(tickOpts.userCallback || tickOpts.callback, this); }, afterTickToLabelConversion: function() { helpers$1.callback(this.options.afterTickToLabelConversion, [this]); },
//
beforeCalculateTickRotation: function() { helpers$1.callback(this.options.beforeCalculateTickRotation, [this]); }, calculateTickRotation: function() { var me = this; var context = me.ctx; var tickOpts = me.options.ticks; var labels = labelsFromTicks(me._ticks);
// Get the width of each grid by calculating the difference // between x offsets between 0 and 1. var tickFont = helpers$1.options._parseFont(tickOpts); context.font = tickFont.string;
var labelRotation = tickOpts.minRotation || 0;
if (labels.length && me.options.display && me.isHorizontal()) { var originalLabelWidth = helpers$1.longestText(context, tickFont.string, labels, me.longestTextCache); var labelWidth = originalLabelWidth; var cosRotation, sinRotation;
// Allow 3 pixels x2 padding either side for label readability var tickWidth = me.getPixelForTick(1) - me.getPixelForTick(0) - 6;
// Max label rotation can be set or default to 90 - also act as a loop counter while (labelWidth > tickWidth && labelRotation < tickOpts.maxRotation) { var angleRadians = helpers$1.toRadians(labelRotation); cosRotation = Math.cos(angleRadians); sinRotation = Math.sin(angleRadians);
if (sinRotation * originalLabelWidth > me.maxHeight) { // go back one step labelRotation--; break; }
labelRotation++; labelWidth = cosRotation * originalLabelWidth; } }
me.labelRotation = labelRotation; }, afterCalculateTickRotation: function() { helpers$1.callback(this.options.afterCalculateTickRotation, [this]); },
//
beforeFit: function() { helpers$1.callback(this.options.beforeFit, [this]); }, fit: function() { var me = this; // Reset var minSize = me.minSize = { width: 0, height: 0 };
var labels = labelsFromTicks(me._ticks);
var opts = me.options; var tickOpts = opts.ticks; var scaleLabelOpts = opts.scaleLabel; var gridLineOpts = opts.gridLines; var display = me._isVisible(); var position = opts.position; var isHorizontal = me.isHorizontal();
var parseFont = helpers$1.options._parseFont; var tickFont = parseFont(tickOpts); var tickMarkLength = opts.gridLines.tickMarkLength;
// Width if (isHorizontal) { // subtract the margins to line up with the chartArea if we are a full width scale minSize.width = me.isFullWidth() ? me.maxWidth - me.margins.left - me.margins.right : me.maxWidth; } else { minSize.width = display && gridLineOpts.drawTicks ? tickMarkLength : 0; }
// height if (isHorizontal) { minSize.height = display && gridLineOpts.drawTicks ? tickMarkLength : 0; } else { minSize.height = me.maxHeight; // fill all the height }
// Are we showing a title for the scale? if (scaleLabelOpts.display && display) { var scaleLabelFont = parseFont(scaleLabelOpts); var scaleLabelPadding = helpers$1.options.toPadding(scaleLabelOpts.padding); var deltaHeight = scaleLabelFont.lineHeight + scaleLabelPadding.height;
if (isHorizontal) { minSize.height += deltaHeight; } else { minSize.width += deltaHeight; } }
// Don't bother fitting the ticks if we are not showing the labels if (tickOpts.display && display) { var largestTextWidth = helpers$1.longestText(me.ctx, tickFont.string, labels, me.longestTextCache); var tallestLabelHeightInLines = helpers$1.numberOfLabelLines(labels); var lineSpace = tickFont.size * 0.5; var tickPadding = me.options.ticks.padding;
// Store max number of lines and widest label for _autoSkip me._maxLabelLines = tallestLabelHeightInLines; me.longestLabelWidth = largestTextWidth;
if (isHorizontal) { var angleRadians = helpers$1.toRadians(me.labelRotation); var cosRotation = Math.cos(angleRadians); var sinRotation = Math.sin(angleRadians);
// TODO - improve this calculation var labelHeight = (sinRotation * largestTextWidth) + (tickFont.lineHeight * tallestLabelHeightInLines) + lineSpace; // padding
minSize.height = Math.min(me.maxHeight, minSize.height + labelHeight + tickPadding);
me.ctx.font = tickFont.string; var firstLabelWidth = computeTextSize(me.ctx, labels[0], tickFont.string); var lastLabelWidth = computeTextSize(me.ctx, labels[labels.length - 1], tickFont.string); var offsetLeft = me.getPixelForTick(0) - me.left; var offsetRight = me.right - me.getPixelForTick(labels.length - 1); var paddingLeft, paddingRight;
// Ensure that our ticks are always inside the canvas. When rotated, ticks are right aligned // which means that the right padding is dominated by the font height if (me.labelRotation !== 0) { paddingLeft = position === 'bottom' ? (cosRotation * firstLabelWidth) : (cosRotation * lineSpace); paddingRight = position === 'bottom' ? (cosRotation * lineSpace) : (cosRotation * lastLabelWidth); } else { paddingLeft = firstLabelWidth / 2; paddingRight = lastLabelWidth / 2; } me.paddingLeft = Math.max(paddingLeft - offsetLeft, 0) + 3; // add 3 px to move away from canvas edges me.paddingRight = Math.max(paddingRight - offsetRight, 0) + 3; } else { // A vertical axis is more constrained by t