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/*!
* Chart.js v2.8.0
* https://www.chartjs.org
* (c) 2019 Chart.js Contributors
* Released under the MIT License
*/
(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('<ul class="' + chart.id + '-legend">');
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('<li><span style="background-color:' + datasets[0].backgroundColor[i] + '"></span>');
if (labels[i]) {
text.push(labels[i]);
}
text.push('</li>');
}
}
text.push('</ul>');
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('<ul class="' + chart.id + '-legend">');
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('<li><span style="background-color:' + datasets[0].backgroundColor[i] + '"></span>');
if (labels[i]) {
text.push(labels[i]);
}
text.push('</li>');
}
}
text.push('</ul>');
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 {{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 the width. Labels are the
// dominant factor here, so get that length first and account for padding
if (tickOpts.mirror) {
largestTextWidth = 0;
} else {
// use lineSpace for consistency with horizontal axis
// tickPadding is not implemented for horizontal
largestTextWidth += tickPadding + lineSpace;
}
minSize.width = Math.min(me.maxWidth, minSize.width + largestTextWidth);
me.paddingTop = tickFont.size / 2;
me.paddingBottom = tickFont.size / 2;
}
}
me.handleMargins();
me.width = minSize.width;
me.height = minSize.height;
},
/**
* Handle margins and padding interactions
* @private
*/
handleMargins: function() {
var me = this;
if (me.margins) {
me.paddingLeft = Math.max(me.paddingLeft - me.margins.left, 0);
me.paddingTop = Math.max(me.paddingTop - me.margins.top, 0);
me.paddingRight = Math.max(me.paddingRight - me.margins.right, 0);
me.paddingBottom = Math.max(me.paddingBottom - me.margins.bottom, 0);
}
},
afterFit: function() {
helpers$1.callback(this.options.afterFit, [this]);
},
// Shared Methods
isHorizontal: function() {
return this.options.position === 'top' || this.options.position === 'bottom';
},
isFullWidth: function() {
return (this.options.fullWidth);
},
// Get the correct value. NaN bad inputs, If the value type is object get the x or y based on whether we are horizontal or not
getRightValue: function(rawValue) {
// Null and undefined values first
if (helpers$1.isNullOrUndef(rawValue)) {
return NaN;
}
// isNaN(object) returns true, so make sure NaN is checking for a number; Discard Infinite values
if ((typeof rawValue === 'number' || rawValue instanceof Number) && !isFinite(rawValue)) {
return NaN;
}
// If it is in fact an object, dive in one more level
if (rawValue) {
if (this.isHorizontal()) {
if (rawValue.x !== undefined) {
return this.getRightValue(rawValue.x);
}
} else if (rawValue.y !== undefined) {
return this.getRightValue(rawValue.y);
}
}
// Value is good, return it
return rawValue;
},
/**
* Used to get the value to display in the tooltip for the data at the given index
* @param index
* @param datasetIndex
*/
getLabelForIndex: helpers$1.noop,
/**
* Returns the location of the given data point. Value can either be an index or a numerical value
* The coordinate (0, 0) is at the upper-left corner of the canvas
* @param value
* @param index
* @param datasetIndex
*/
getPixelForValue: helpers$1.noop,
/**
* Used to get the data value from a given pixel. This is the inverse of getPixelForValue
* The coordinate (0, 0) is at the upper-left corner of the canvas
* @param pixel
*/
getValueForPixel: helpers$1.noop,
/**
* Returns the location of the tick at the given index
* The coordinate (0, 0) is at the upper-left corner of the canvas
*/
getPixelForTick: function(index) {
var me = this;
var offset = me.options.offset;
if (me.isHorizontal()) {
var innerWidth = me.width - (me.paddingLeft + me.paddingRight);
var tickWidth = innerWidth / Math.max((me._ticks.length - (offset ? 0 : 1)), 1);
var pixel = (tickWidth * index) + me.paddingLeft;
if (offset) {
pixel += tickWidth / 2;
}
var finalVal = me.left + pixel;
finalVal += me.isFullWidth() ? me.margins.left : 0;
return finalVal;
}
var innerHeight = me.height - (me.paddingTop + me.paddingBottom);
return me.top + (index * (innerHeight / (me._ticks.length - 1)));
},
/**
* Utility for getting the pixel location of a percentage of scale
* The coordinate (0, 0) is at the upper-left corner of the canvas
*/
getPixelForDecimal: function(decimal) {
var me = this;
if (me.isHorizontal()) {
var innerWidth = me.width - (me.paddingLeft + me.paddingRight);
var valueOffset = (innerWidth * decimal) + me.paddingLeft;
var finalVal = me.left + valueOffset;
finalVal += me.isFullWidth() ? me.margins.left : 0;
return finalVal;
}
return me.top + (decimal * me.height);
},
/**
* Returns the pixel for the minimum chart value
* The coordinate (0, 0) is at the upper-left corner of the canvas
*/
getBasePixel: function() {
return this.getPixelForValue(this.getBaseValue());
},
getBaseValue: function() {
var me = this;
var min = me.min;
var max = me.max;
return me.beginAtZero ? 0 :
min < 0 && max < 0 ? max :
min > 0 && max > 0 ? min :
0;
},
/**
* Returns a subset of ticks to be plotted to avoid overlapping labels.
* @private
*/
_autoSkip: function(ticks) {
var me = this;
var isHorizontal = me.isHorizontal();
var optionTicks = me.options.ticks.minor;
var tickCount = ticks.length;
var skipRatio = false;
var maxTicks = optionTicks.maxTicksLimit;
// Total space needed to display all ticks. First and last ticks are
// drawn as their center at end of axis, so tickCount-1
var ticksLength = me._tickSize() * (tickCount - 1);
// Axis length
var axisLength = isHorizontal
? me.width - (me.paddingLeft + me.paddingRight)
: me.height - (me.paddingTop + me.PaddingBottom);
var result = [];
var i, tick;
if (ticksLength > axisLength) {
skipRatio = 1 + Math.floor(ticksLength / axisLength);
}
// if they defined a max number of optionTicks,
// increase skipRatio until that number is met
if (tickCount > maxTicks) {
skipRatio = Math.max(skipRatio, 1 + Math.floor(tickCount / maxTicks));
}
for (i = 0; i < tickCount; i++) {
tick = ticks[i];
if (skipRatio > 1 && i % skipRatio > 0) {
// leave tick in place but make sure it's not displayed (#4635)
delete tick.label;
}
result.push(tick);
}
return result;
},
/**
* @private
*/
_tickSize: function() {
var me = this;
var isHorizontal = me.isHorizontal();
var optionTicks = me.options.ticks.minor;
// Calculate space needed by label in axis direction.
var rot = helpers$1.toRadians(me.labelRotation);
var cos = Math.abs(Math.cos(rot));
var sin = Math.abs(Math.sin(rot));
var padding = optionTicks.autoSkipPadding || 0;
var w = (me.longestLabelWidth + padding) || 0;
var tickFont = helpers$1.options._parseFont(optionTicks);
var h = (me._maxLabelLines * tickFont.lineHeight + padding) || 0;
// Calculate space needed for 1 tick in axis direction.
return isHorizontal
? h * cos > w * sin ? w / cos : h / sin
: h * sin < w * cos ? h / cos : w / sin;
},
/**
* @private
*/
_isVisible: function() {
var me = this;
var chart = me.chart;
var display = me.options.display;
var i, ilen, meta;
if (display !== 'auto') {
return !!display;
}
// When 'auto', the scale is visible if at least one associated dataset is visible.
for (i = 0, ilen = chart.data.datasets.length; i < ilen; ++i) {
if (chart.isDatasetVisible(i)) {
meta = chart.getDatasetMeta(i);
if (meta.xAxisID === me.id || meta.yAxisID === me.id) {
return true;
}
}
}
return false;
},
/**
* Actually draw the scale on the canvas
* @param {object} chartArea - the area of the chart to draw full grid lines on
*/
draw: function(chartArea) {
var me = this;
var options = me.options;
if (!me._isVisible()) {
return;
}
var chart = me.chart;
var context = me.ctx;
var globalDefaults = core_defaults.global;
var defaultFontColor = globalDefaults.defaultFontColor;
var optionTicks = options.ticks.minor;
var optionMajorTicks = options.ticks.major || optionTicks;
var gridLines = options.gridLines;
var scaleLabel = options.scaleLabel;
var position = options.position;
var isRotated = me.labelRotation !== 0;
var isMirrored = optionTicks.mirror;
var isHorizontal = me.isHorizontal();
var parseFont = helpers$1.options._parseFont;
var ticks = optionTicks.display && optionTicks.autoSkip ? me._autoSkip(me.getTicks()) : me.getTicks();
var tickFontColor = valueOrDefault$9(optionTicks.fontColor, defaultFontColor);
var tickFont = parseFont(optionTicks);
var lineHeight = tickFont.lineHeight;
var majorTickFontColor = valueOrDefault$9(optionMajorTicks.fontColor, defaultFontColor);
var majorTickFont = parseFont(optionMajorTicks);
var tickPadding = optionTicks.padding;
var labelOffset = optionTicks.labelOffset;
var tl = gridLines.drawTicks ? gridLines.tickMarkLength : 0;
var scaleLabelFontColor = valueOrDefault$9(scaleLabel.fontColor, defaultFontColor);
var scaleLabelFont = parseFont(scaleLabel);
var scaleLabelPadding = helpers$1.options.toPadding(scaleLabel.padding);
var labelRotationRadians = helpers$1.toRadians(me.labelRotation);
var itemsToDraw = [];
var axisWidth = gridLines.drawBorder ? valueAtIndexOrDefault(gridLines.lineWidth, 0, 0) : 0;
var alignPixel = helpers$1._alignPixel;
var borderValue, tickStart, tickEnd;
if (position === 'top') {
borderValue = alignPixel(chart, me.bottom, axisWidth);
tickStart = me.bottom - tl;
tickEnd = borderValue - axisWidth / 2;
} else if (position === 'bottom') {
borderValue = alignPixel(chart, me.top, axisWidth);
tickStart = borderValue + axisWidth / 2;
tickEnd = me.top + tl;
} else if (position === 'left') {
borderValue = alignPixel(chart, me.right, axisWidth);
tickStart = me.right - tl;
tickEnd = borderValue - axisWidth / 2;
} else {
borderValue = alignPixel(chart, me.left, axisWidth);
tickStart = borderValue + axisWidth / 2;
tickEnd = me.left + tl;
}
var epsilon = 0.0000001; // 0.0000001 is margin in pixels for Accumulated error.
helpers$1.each(ticks, function(tick, index) {
// autoskipper skipped this tick (#4635)
if (helpers$1.isNullOrUndef(tick.label)) {
return;
}
var label = tick.label;
var lineWidth, lineColor, borderDash, borderDashOffset;
if (index === me.zeroLineIndex && options.offset === gridLines.offsetGridLines) {
// Draw the first index specially
lineWidth = gridLines.zeroLineWidth;
lineColor = gridLines.zeroLineColor;
borderDash = gridLines.zeroLineBorderDash || [];
borderDashOffset = gridLines.zeroLineBorderDashOffset || 0.0;
} else {
lineWidth = valueAtIndexOrDefault(gridLines.lineWidth, index);
lineColor = valueAtIndexOrDefault(gridLines.color, index);
borderDash = gridLines.borderDash || [];
borderDashOffset = gridLines.borderDashOffset || 0.0;
}
// Common properties
var tx1, ty1, tx2, ty2, x1, y1, x2, y2, labelX, labelY, textOffset, textAlign;
var labelCount = helpers$1.isArray(label) ? label.length : 1;
var lineValue = getPixelForGridLine(me, index, gridLines.offsetGridLines);
if (isHorizontal) {
var labelYOffset = tl + tickPadding;
if (lineValue < me.left - epsilon) {
lineColor = 'rgba(0,0,0,0)';
}
tx1 = tx2 = x1 = x2 = alignPixel(chart, lineValue, lineWidth);
ty1 = tickStart;
ty2 = tickEnd;
labelX = me.getPixelForTick(index) + labelOffset; // x values for optionTicks (need to consider offsetLabel option)
if (position === 'top') {
y1 = alignPixel(chart, chartArea.top, axisWidth) + axisWidth / 2;
y2 = chartArea.bottom;
textOffset = ((!isRotated ? 0.5 : 1) - labelCount) * lineHeight;
textAlign = !isRotated ? 'center' : 'left';
labelY = me.bottom - labelYOffset;
} else {
y1 = chartArea.top;
y2 = alignPixel(chart, chartArea.bottom, axisWidth) - axisWidth / 2;
textOffset = (!isRotated ? 0.5 : 0) * lineHeight;
textAlign = !isRotated ? 'center' : 'right';
labelY = me.top + labelYOffset;
}
} else {
var labelXOffset = (isMirrored ? 0 : tl) + tickPadding;
if (lineValue < me.top - epsilon) {
lineColor = 'rgba(0,0,0,0)';
}
tx1 = tickStart;
tx2 = tickEnd;
ty1 = ty2 = y1 = y2 = alignPixel(chart, lineValue, lineWidth);
labelY = me.getPixelForTick(index) + labelOffset;
textOffset = (1 - labelCount) * lineHeight / 2;
if (position === 'left') {
x1 = alignPixel(chart, chartArea.left, axisWidth) + axisWidth / 2;
x2 = chartArea.right;
textAlign = isMirrored ? 'left' : 'right';
labelX = me.right - labelXOffset;
} else {
x1 = chartArea.left;
x2 = alignPixel(chart, chartArea.right, axisWidth) - axisWidth / 2;
textAlign = isMirrored ? 'right' : 'left';
labelX = me.left + labelXOffset;
}
}
itemsToDraw.push({
tx1: tx1,
ty1: ty1,
tx2: tx2,
ty2: ty2,
x1: x1,
y1: y1,
x2: x2,
y2: y2,
labelX: labelX,
labelY: labelY,
glWidth: lineWidth,
glColor: lineColor,
glBorderDash: borderDash,
glBorderDashOffset: borderDashOffset,
rotation: -1 * labelRotationRadians,
label: label,
major: tick.major,
textOffset: textOffset,
textAlign: textAlign
});
});
// Draw all of the tick labels, tick marks, and grid lines at the correct places
helpers$1.each(itemsToDraw, function(itemToDraw) {
var glWidth = itemToDraw.glWidth;
var glColor = itemToDraw.glColor;
if (gridLines.display && glWidth && glColor) {
context.save();
context.lineWidth = glWidth;
context.strokeStyle = glColor;
if (context.setLineDash) {
context.setLineDash(itemToDraw.glBorderDash);
context.lineDashOffset = itemToDraw.glBorderDashOffset;
}
context.beginPath();
if (gridLines.drawTicks) {
context.moveTo(itemToDraw.tx1, itemToDraw.ty1);
context.lineTo(itemToDraw.tx2, itemToDraw.ty2);
}
if (gridLines.drawOnChartArea) {
context.moveTo(itemToDraw.x1, itemToDraw.y1);
context.lineTo(itemToDraw.x2, itemToDraw.y2);
}
context.stroke();
context.restore();
}
if (optionTicks.display) {
// Make sure we draw text in the correct color and font
context.save();
context.translate(itemToDraw.labelX, itemToDraw.labelY);
context.rotate(itemToDraw.rotation);
context.font = itemToDraw.major ? majorTickFont.string : tickFont.string;
context.fillStyle = itemToDraw.major ? majorTickFontColor : tickFontColor;
context.textBaseline = 'middle';
context.textAlign = itemToDraw.textAlign;
var label = itemToDraw.label;
var y = itemToDraw.textOffset;
if (helpers$1.isArray(label)) {
for (var i = 0; i < label.length; ++i) {
// We just make sure the multiline element is a string here..
context.fillText('' + label[i], 0, y);
y += lineHeight;
}
} else {
context.fillText(label, 0, y);
}
context.restore();
}
});
if (scaleLabel.display) {
// Draw the scale label
var scaleLabelX;
var scaleLabelY;
var rotation = 0;
var halfLineHeight = scaleLabelFont.lineHeight / 2;
if (isHorizontal) {
scaleLabelX = me.left + ((me.right - me.left) / 2); // midpoint of the width
scaleLabelY = position === 'bottom'
? me.bottom - halfLineHeight - scaleLabelPadding.bottom
: me.top + halfLineHeight + scaleLabelPadding.top;
} else {
var isLeft = position === 'left';
scaleLabelX = isLeft
? me.left + halfLineHeight + scaleLabelPadding.top
: me.right - halfLineHeight - scaleLabelPadding.top;
scaleLabelY = me.top + ((me.bottom - me.top) / 2);
rotation = isLeft ? -0.5 * Math.PI : 0.5 * Math.PI;
}
context.save();
context.translate(scaleLabelX, scaleLabelY);
context.rotate(rotation);
context.textAlign = 'center';
context.textBaseline = 'middle';
context.fillStyle = scaleLabelFontColor; // render in correct colour
context.font = scaleLabelFont.string;
context.fillText(scaleLabel.labelString, 0, 0);
context.restore();
}
if (axisWidth) {
// Draw the line at the edge of the axis
var firstLineWidth = axisWidth;
var lastLineWidth = valueAtIndexOrDefault(gridLines.lineWidth, ticks.length - 1, 0);
var x1, x2, y1, y2;
if (isHorizontal) {
x1 = alignPixel(chart, me.left, firstLineWidth) - firstLineWidth / 2;
x2 = alignPixel(chart, me.right, lastLineWidth) + lastLineWidth / 2;
y1 = y2 = borderValue;
} else {
y1 = alignPixel(chart, me.top, firstLineWidth) - firstLineWidth / 2;
y2 = alignPixel(chart, me.bottom, lastLineWidth) + lastLineWidth / 2;
x1 = x2 = borderValue;
}
context.lineWidth = axisWidth;
context.strokeStyle = valueAtIndexOrDefault(gridLines.color, 0);
context.beginPath();
context.moveTo(x1, y1);
context.lineTo(x2, y2);
context.stroke();
}
}
});
var defaultConfig = {
position: 'bottom'
};
var scale_category = core_scale.extend({
/**
* Internal function to get the correct labels. If data.xLabels or data.yLabels are defined, use those
* else fall back to data.labels
* @private
*/
getLabels: function() {
var data = this.chart.data;
return this.options.labels || (this.isHorizontal() ? data.xLabels : data.yLabels) || data.labels;
},
determineDataLimits: function() {
var me = this;
var labels = me.getLabels();
me.minIndex = 0;
me.maxIndex = labels.length - 1;
var findIndex;
if (me.options.ticks.min !== undefined) {
// user specified min value
findIndex = labels.indexOf(me.options.ticks.min);
me.minIndex = findIndex !== -1 ? findIndex : me.minIndex;
}
if (me.options.ticks.max !== undefined) {
// user specified max value
findIndex = labels.indexOf(me.options.ticks.max);
me.maxIndex = findIndex !== -1 ? findIndex : me.maxIndex;
}
me.min = labels[me.minIndex];
me.max = labels[me.maxIndex];
},
buildTicks: function() {
var me = this;
var labels = me.getLabels();
// If we are viewing some subset of labels, slice the original array
me.ticks = (me.minIndex === 0 && me.maxIndex === labels.length - 1) ? labels : labels.slice(me.minIndex, me.maxIndex + 1);
},
getLabelForIndex: function(index, datasetIndex) {
var me = this;
var chart = me.chart;
if (chart.getDatasetMeta(datasetIndex).controller._getValueScaleId() === me.id) {
return me.getRightValue(chart.data.datasets[datasetIndex].data[index]);
}
return me.ticks[index - me.minIndex];
},
// Used to get data value locations. Value can either be an index or a numerical value
getPixelForValue: function(value, index) {
var me = this;
var offset = me.options.offset;
// 1 is added because we need the length but we have the indexes
var offsetAmt = Math.max((me.maxIndex + 1 - me.minIndex - (offset ? 0 : 1)), 1);
// If value is a data object, then index is the index in the data array,
// not the index of the scale. We need to change that.
var valueCategory;
if (value !== undefined && value !== null) {
valueCategory = me.isHorizontal() ? value.x : value.y;
}
if (valueCategory !== undefined || (value !== undefined && isNaN(index))) {
var labels = me.getLabels();
value = valueCategory || value;
var idx = labels.indexOf(value);
index = idx !== -1 ? idx : index;
}
if (me.isHorizontal()) {
var valueWidth = me.width / offsetAmt;
var widthOffset = (valueWidth * (index - me.minIndex));
if (offset) {
widthOffset += (valueWidth / 2);
}
return me.left + widthOffset;
}
var valueHeight = me.height / offsetAmt;
var heightOffset = (valueHeight * (index - me.minIndex));
if (offset) {
heightOffset += (valueHeight / 2);
}
return me.top + heightOffset;
},
getPixelForTick: function(index) {
return this.getPixelForValue(this.ticks[index], index + this.minIndex, null);
},
getValueForPixel: function(pixel) {
var me = this;
var offset = me.options.offset;
var value;
var offsetAmt = Math.max((me._ticks.length - (offset ? 0 : 1)), 1);
var horz = me.isHorizontal();
var valueDimension = (horz ? me.width : me.height) / offsetAmt;
pixel -= horz ? me.left : me.top;
if (offset) {
pixel -= (valueDimension / 2);
}
if (pixel <= 0) {
value = 0;
} else {
value = Math.round(pixel / valueDimension);
}
return value + me.minIndex;
},
getBasePixel: function() {
return this.bottom;
}
});
// INTERNAL: static default options, registered in src/index.js
var _defaults = defaultConfig;
scale_category._defaults = _defaults;
var noop = helpers$1.noop;
var isNullOrUndef = helpers$1.isNullOrUndef;
/**
* Generate a set of linear ticks
* @param generationOptions the options used to generate the ticks
* @param dataRange the range of the data
* @returns {number[]} array of tick values
*/
function generateTicks(generationOptions, dataRange) {
var ticks = [];
// To get a "nice" value for the tick spacing, we will use the appropriately named
// "nice number" algorithm. See https://stackoverflow.com/questions/8506881/nice-label-algorithm-for-charts-with-minimum-ticks
// for details.
var MIN_SPACING = 1e-14;
var stepSize = generationOptions.stepSize;
var unit = stepSize || 1;
var maxNumSpaces = generationOptions.maxTicks - 1;
var min = generationOptions.min;
var max = generationOptions.max;
var precision = generationOptions.precision;
var rmin = dataRange.min;
var rmax = dataRange.max;
var spacing = helpers$1.niceNum((rmax - rmin) / maxNumSpaces / unit) * unit;
var factor, niceMin, niceMax, numSpaces;
// Beyond MIN_SPACING floating point numbers being to lose precision
// such that we can't do the math necessary to generate ticks
if (spacing < MIN_SPACING && isNullOrUndef(min) && isNullOrUndef(max)) {
return [rmin, rmax];
}
numSpaces = Math.ceil(rmax / spacing) - Math.floor(rmin / spacing);
if (numSpaces > maxNumSpaces) {
// If the calculated num of spaces exceeds maxNumSpaces, recalculate it
spacing = helpers$1.niceNum(numSpaces * spacing / maxNumSpaces / unit) * unit;
}
if (stepSize || isNullOrUndef(precision)) {
// If a precision is not specified, calculate factor based on spacing
factor = Math.pow(10, helpers$1._decimalPlaces(spacing));
} else {
// If the user specified a precision, round to that number of decimal places
factor = Math.pow(10, precision);
spacing = Math.ceil(spacing * factor) / factor;
}
niceMin = Math.floor(rmin / spacing) * spacing;
niceMax = Math.ceil(rmax / spacing) * spacing;
// If min, max and stepSize is set and they make an evenly spaced scale use it.
if (stepSize) {
// If very close to our whole number, use it.
if (!isNullOrUndef(min) && helpers$1.almostWhole(min / spacing, spacing / 1000)) {
niceMin = min;
}
if (!isNullOrUndef(max) && helpers$1.almostWhole(max / spacing, spacing / 1000)) {
niceMax = max;
}
}
numSpaces = (niceMax - niceMin) / spacing;
// If very close to our rounded value, use it.
if (helpers$1.almostEquals(numSpaces, Math.round(numSpaces), spacing / 1000)) {
numSpaces = Math.round(numSpaces);
} else {
numSpaces = Math.ceil(numSpaces);
}
niceMin = Math.round(niceMin * factor) / factor;
niceMax = Math.round(niceMax * factor) / factor;
ticks.push(isNullOrUndef(min) ? niceMin : min);
for (var j = 1; j < numSpaces; ++j) {
ticks.push(Math.round((niceMin + j * spacing) * factor) / factor);
}
ticks.push(isNullOrUndef(max) ? niceMax : max);
return ticks;
}
var scale_linearbase = core_scale.extend({
getRightValue: function(value) {
if (typeof value === 'string') {
return +value;
}
return core_scale.prototype.getRightValue.call(this, value);
},
handleTickRangeOptions: function() {
var me = this;
var opts = me.options;
var tickOpts = opts.ticks;
// If we are forcing it to begin at 0, but 0 will already be rendered on the chart,
// do nothing since that would make the chart weird. If the user really wants a weird chart
// axis, they can manually override it
if (tickOpts.beginAtZero) {
var minSign = helpers$1.sign(me.min);
var maxSign = helpers$1.sign(me.max);
if (minSign < 0 && maxSign < 0) {
// move the top up to 0
me.max = 0;
} else if (minSign > 0 && maxSign > 0) {
// move the bottom down to 0
me.min = 0;
}
}
var setMin = tickOpts.min !== undefined || tickOpts.suggestedMin !== undefined;
var setMax = tickOpts.max !== undefined || tickOpts.suggestedMax !== undefined;
if (tickOpts.min !== undefined) {
me.min = tickOpts.min;
} else if (tickOpts.suggestedMin !== undefined) {
if (me.min === null) {
me.min = tickOpts.suggestedMin;
} else {
me.min = Math.min(me.min, tickOpts.suggestedMin);
}
}
if (tickOpts.max !== undefined) {
me.max = tickOpts.max;
} else if (tickOpts.suggestedMax !== undefined) {
if (me.max === null) {
me.max = tickOpts.suggestedMax;
} else {
me.max = Math.max(me.max, tickOpts.suggestedMax);
}
}
if (setMin !== setMax) {
// We set the min or the max but not both.
// So ensure that our range is good
// Inverted or 0 length range can happen when
// ticks.min is set, and no datasets are visible
if (me.min >= me.max) {
if (setMin) {
me.max = me.min + 1;
} else {
me.min = me.max - 1;
}
}
}
if (me.min === me.max) {
me.max++;
if (!tickOpts.beginAtZero) {
me.min--;
}
}
},
getTickLimit: function() {
var me = this;
var tickOpts = me.options.ticks;
var stepSize = tickOpts.stepSize;
var maxTicksLimit = tickOpts.maxTicksLimit;
var maxTicks;
if (stepSize) {
maxTicks = Math.ceil(me.max / stepSize) - Math.floor(me.min / stepSize) + 1;
} else {
maxTicks = me._computeTickLimit();
maxTicksLimit = maxTicksLimit || 11;
}
if (maxTicksLimit) {
maxTicks = Math.min(maxTicksLimit, maxTicks);
}
return maxTicks;
},
_computeTickLimit: function() {
return Number.POSITIVE_INFINITY;
},
handleDirectionalChanges: noop,
buildTicks: function() {
var me = this;
var opts = me.options;
var tickOpts = opts.ticks;
// Figure out what the max number of ticks we can support it is based on the size of
// the axis area. For now, we say that the minimum tick spacing in pixels must be 40
// We also limit the maximum number of ticks to 11 which gives a nice 10 squares on
// the graph. Make sure we always have at least 2 ticks
var maxTicks = me.getTickLimit();
maxTicks = Math.max(2, maxTicks);
var numericGeneratorOptions = {
maxTicks: maxTicks,
min: tickOpts.min,
max: tickOpts.max,
precision: tickOpts.precision,
stepSize: helpers$1.valueOrDefault(tickOpts.fixedStepSize, tickOpts.stepSize)
};
var ticks = me.ticks = generateTicks(numericGeneratorOptions, me);
me.handleDirectionalChanges();
// At this point, we need to update our max and min given the tick values since we have expanded the
// range of the scale
me.max = helpers$1.max(ticks);
me.min = helpers$1.min(ticks);
if (tickOpts.reverse) {
ticks.reverse();
me.start = me.max;
me.end = me.min;
} else {
me.start = me.min;
me.end = me.max;
}
},
convertTicksToLabels: function() {
var me = this;
me.ticksAsNumbers = me.ticks.slice();
me.zeroLineIndex = me.ticks.indexOf(0);
core_scale.prototype.convertTicksToLabels.call(me);
}
});
var defaultConfig$1 = {
position: 'left',
ticks: {
callback: core_ticks.formatters.linear
}
};
var scale_linear = scale_linearbase.extend({
determineDataLimits: function() {
var me = this;
var opts = me.options;
var chart = me.chart;
var data = chart.data;
var datasets = data.datasets;
var isHorizontal = me.isHorizontal();
var DEFAULT_MIN = 0;
var DEFAULT_MAX = 1;
function IDMatches(meta) {
return isHorizontal ? meta.xAxisID === me.id : meta.yAxisID === me.id;
}
// First Calculate the range
me.min = null;
me.max = null;
var hasStacks = opts.stacked;
if (hasStacks === undefined) {
helpers$1.each(datasets, function(dataset, datasetIndex) {
if (hasStacks) {
return;
}
var meta = chart.getDatasetMeta(datasetIndex);
if (chart.isDatasetVisible(datasetIndex) && IDMatches(meta) &&
meta.stack !== undefined) {
hasStacks = true;
}
});
}
if (opts.stacked || hasStacks) {
var valuesPerStack = {};
helpers$1.each(datasets, function(dataset, datasetIndex) {
var meta = chart.getDatasetMeta(datasetIndex);
var key = [
meta.type,
// we have a separate stack for stack=undefined datasets when the opts.stacked is undefined
((opts.stacked === undefined && meta.stack === undefined) ? datasetIndex : ''),
meta.stack
].join('.');
if (valuesPerStack[key] === undefined) {
valuesPerStack[key] = {
positiveValues: [],
negativeValues: []
};
}
// Store these per type
var positiveValues = valuesPerStack[key].positiveValues;
var negativeValues = valuesPerStack[key].negativeValues;
if (chart.isDatasetVisible(datasetIndex) && IDMatches(meta)) {
helpers$1.each(dataset.data, function(rawValue, index) {
var value = +me.getRightValue(rawValue);
if (isNaN(value) || meta.data[index].hidden) {
return;
}
positiveValues[index] = positiveValues[index] || 0;
negativeValues[index] = negativeValues[index] || 0;
if (opts.relativePoints) {
positiveValues[index] = 100;
} else if (value < 0) {
negativeValues[index] += value;
} else {
positiveValues[index] += value;
}
});
}
});
helpers$1.each(valuesPerStack, function(valuesForType) {
var values = valuesForType.positiveValues.concat(valuesForType.negativeValues);
var minVal = helpers$1.min(values);
var maxVal = helpers$1.max(values);
me.min = me.min === null ? minVal : Math.min(me.min, minVal);
me.max = me.max === null ? maxVal : Math.max(me.max, maxVal);
});
} else {
helpers$1.each(datasets, function(dataset, datasetIndex) {
var meta = chart.getDatasetMeta(datasetIndex);
if (chart.isDatasetVisible(datasetIndex) && IDMatches(meta)) {
helpers$1.each(dataset.data, function(rawValue, index) {
var value = +me.getRightValue(rawValue);
if (isNaN(value) || meta.data[index].hidden) {
return;
}
if (me.min === null) {
me.min = value;
} else if (value < me.min) {
me.min = value;
}
if (me.max === null) {
me.max = value;
} else if (value > me.max) {
me.max = value;
}
});
}
});
}
me.min = isFinite(me.min) && !isNaN(me.min) ? me.min : DEFAULT_MIN;
me.max = isFinite(me.max) && !isNaN(me.max) ? me.max : DEFAULT_MAX;
// Common base implementation to handle ticks.min, ticks.max, ticks.beginAtZero
this.handleTickRangeOptions();
},
// Returns the maximum number of ticks based on the scale dimension
_computeTickLimit: function() {
var me = this;
var tickFont;
if (me.isHorizontal()) {
return Math.ceil(me.width / 40);
}
tickFont = helpers$1.options._parseFont(me.options.ticks);
return Math.ceil(me.height / tickFont.lineHeight);
},
// Called after the ticks are built. We need
handleDirectionalChanges: function() {
if (!this.isHorizontal()) {
// We are in a vertical orientation. The top value is the highest. So reverse the array
this.ticks.reverse();
}
},
getLabelForIndex: function(index, datasetIndex) {
return +this.getRightValue(this.chart.data.datasets[datasetIndex].data[index]);
},
// Utils
getPixelForValue: function(value) {
// This must be called after fit has been run so that
// this.left, this.top, this.right, and this.bottom have been defined
var me = this;
var start = me.start;
var rightValue = +me.getRightValue(value);
var pixel;
var range = me.end - start;
if (me.isHorizontal()) {
pixel = me.left + (me.width / range * (rightValue - start));
} else {
pixel = me.bottom - (me.height / range * (rightValue - start));
}
return pixel;
},
getValueForPixel: function(pixel) {
var me = this;
var isHorizontal = me.isHorizontal();
var innerDimension = isHorizontal ? me.width : me.height;
var offset = (isHorizontal ? pixel - me.left : me.bottom - pixel) / innerDimension;
return me.start + ((me.end - me.start) * offset);
},
getPixelForTick: function(index) {
return this.getPixelForValue(this.ticksAsNumbers[index]);
}
});
// INTERNAL: static default options, registered in src/index.js
var _defaults$1 = defaultConfig$1;
scale_linear._defaults = _defaults$1;
var valueOrDefault$a = helpers$1.valueOrDefault;
/**
* Generate a set of logarithmic ticks
* @param generationOptions the options used to generate the ticks
* @param dataRange the range of the data
* @returns {number[]} array of tick values
*/
function generateTicks$1(generationOptions, dataRange) {
var ticks = [];
var tickVal = valueOrDefault$a(generationOptions.min, Math.pow(10, Math.floor(helpers$1.log10(dataRange.min))));
var endExp = Math.floor(helpers$1.log10(dataRange.max));
var endSignificand = Math.ceil(dataRange.max / Math.pow(10, endExp));
var exp, significand;
if (tickVal === 0) {
exp = Math.floor(helpers$1.log10(dataRange.minNotZero));
significand = Math.floor(dataRange.minNotZero / Math.pow(10, exp));
ticks.push(tickVal);
tickVal = significand * Math.pow(10, exp);
} else {
exp = Math.floor(helpers$1.log10(tickVal));
significand = Math.floor(tickVal / Math.pow(10, exp));
}
var precision = exp < 0 ? Math.pow(10, Math.abs(exp)) : 1;
do {
ticks.push(tickVal);
++significand;
if (significand === 10) {
significand = 1;
++exp;
precision = exp >= 0 ? 1 : precision;
}
tickVal = Math.round(significand * Math.pow(10, exp) * precision) / precision;
} while (exp < endExp || (exp === endExp && significand < endSignificand));
var lastTick = valueOrDefault$a(generationOptions.max, tickVal);
ticks.push(lastTick);
return ticks;
}
var defaultConfig$2 = {
position: 'left',
// label settings
ticks: {
callback: core_ticks.formatters.logarithmic
}
};
// TODO(v3): change this to positiveOrDefault
function nonNegativeOrDefault(value, defaultValue) {
return helpers$1.isFinite(value) && value >= 0 ? value : defaultValue;
}
var scale_logarithmic = core_scale.extend({
determineDataLimits: function() {
var me = this;
var opts = me.options;
var chart = me.chart;
var data = chart.data;
var datasets = data.datasets;
var isHorizontal = me.isHorizontal();
function IDMatches(meta) {
return isHorizontal ? meta.xAxisID === me.id : meta.yAxisID === me.id;
}
// Calculate Range
me.min = null;
me.max = null;
me.minNotZero = null;
var hasStacks = opts.stacked;
if (hasStacks === undefined) {
helpers$1.each(datasets, function(dataset, datasetIndex) {
if (hasStacks) {
return;
}
var meta = chart.getDatasetMeta(datasetIndex);
if (chart.isDatasetVisible(datasetIndex) && IDMatches(meta) &&
meta.stack !== undefined) {
hasStacks = true;
}
});
}
if (opts.stacked || hasStacks) {
var valuesPerStack = {};
helpers$1.each(datasets, function(dataset, datasetIndex) {
var meta = chart.getDatasetMeta(datasetIndex);
var key = [
meta.type,
// we have a separate stack for stack=undefined datasets when the opts.stacked is undefined
((opts.stacked === undefined && meta.stack === undefined) ? datasetIndex : ''),
meta.stack
].join('.');
if (chart.isDatasetVisible(datasetIndex) && IDMatches(meta)) {
if (valuesPerStack[key] === undefined) {
valuesPerStack[key] = [];
}
helpers$1.each(dataset.data, function(rawValue, index) {
var values = valuesPerStack[key];
var value = +me.getRightValue(rawValue);
// invalid, hidden and negative values are ignored
if (isNaN(value) || meta.data[index].hidden || value < 0) {
return;
}
values[index] = values[index] || 0;
values[index] += value;
});
}
});
helpers$1.each(valuesPerStack, function(valuesForType) {
if (valuesForType.length > 0) {
var minVal = helpers$1.min(valuesForType);
var maxVal = helpers$1.max(valuesForType);
me.min = me.min === null ? minVal : Math.min(me.min, minVal);
me.max = me.max === null ? maxVal : Math.max(me.max, maxVal);
}
});
} else {
helpers$1.each(datasets, function(dataset, datasetIndex) {
var meta = chart.getDatasetMeta(datasetIndex);
if (chart.isDatasetVisible(datasetIndex) && IDMatches(meta)) {
helpers$1.each(dataset.data, function(rawValue, index) {
var value = +me.getRightValue(rawValue);
// invalid, hidden and negative values are ignored
if (isNaN(value) || meta.data[index].hidden || value < 0) {
return;
}
if (me.min === null) {
me.min = value;
} else if (value < me.min) {
me.min = value;
}
if (me.max === null) {
me.max = value;
} else if (value > me.max) {
me.max = value;
}
if (value !== 0 && (me.minNotZero === null || value < me.minNotZero)) {
me.minNotZero = value;
}
});
}
});
}
// Common base implementation to handle ticks.min, ticks.max
this.handleTickRangeOptions();
},
handleTickRangeOptions: function() {
var me = this;
var tickOpts = me.options.ticks;
var DEFAULT_MIN = 1;
var DEFAULT_MAX = 10;
me.min = nonNegativeOrDefault(tickOpts.min, me.min);
me.max = nonNegativeOrDefault(tickOpts.max, me.max);
if (me.min === me.max) {
if (me.min !== 0 && me.min !== null) {
me.min = Math.pow(10, Math.floor(helpers$1.log10(me.min)) - 1);
me.max = Math.pow(10, Math.floor(helpers$1.log10(me.max)) + 1);
} else {
me.min = DEFAULT_MIN;
me.max = DEFAULT_MAX;
}
}
if (me.min === null) {
me.min = Math.pow(10, Math.floor(helpers$1.log10(me.max)) - 1);
}
if (me.max === null) {
me.max = me.min !== 0
? Math.pow(10, Math.floor(helpers$1.log10(me.min)) + 1)
: DEFAULT_MAX;
}
if (me.minNotZero === null) {
if (me.min > 0) {
me.minNotZero = me.min;
} else if (me.max < 1) {
me.minNotZero = Math.pow(10, Math.floor(helpers$1.log10(me.max)));
} else {
me.minNotZero = DEFAULT_MIN;
}
}
},
buildTicks: function() {
var me = this;
var tickOpts = me.options.ticks;
var reverse = !me.isHorizontal();
var generationOptions = {
min: nonNegativeOrDefault(tickOpts.min),
max: nonNegativeOrDefault(tickOpts.max)
};
var ticks = me.ticks = generateTicks$1(generationOptions, me);
// At this point, we need to update our max and min given the tick values since we have expanded the
// range of the scale
me.max = helpers$1.max(ticks);
me.min = helpers$1.min(ticks);
if (tickOpts.reverse) {
reverse = !reverse;
me.start = me.max;
me.end = me.min;
} else {
me.start = me.min;
me.end = me.max;
}
if (reverse) {
ticks.reverse();
}
},
convertTicksToLabels: function() {
this.tickValues = this.ticks.slice();
core_scale.prototype.convertTicksToLabels.call(this);
},
// Get the correct tooltip label
getLabelForIndex: function(index, datasetIndex) {
return +this.getRightValue(this.chart.data.datasets[datasetIndex].data[index]);
},
getPixelForTick: function(index) {
return this.getPixelForValue(this.tickValues[index]);
},
/**
* Returns the value of the first tick.
* @param {number} value - The minimum not zero value.
* @return {number} The first tick value.
* @private
*/
_getFirstTickValue: function(value) {
var exp = Math.floor(helpers$1.log10(value));
var significand = Math.floor(value / Math.pow(10, exp));
return significand * Math.pow(10, exp);
},
getPixelForValue: function(value) {
var me = this;
var tickOpts = me.options.ticks;
var reverse = tickOpts.reverse;
var log10 = helpers$1.log10;
var firstTickValue = me._getFirstTickValue(me.minNotZero);
var offset = 0;
var innerDimension, pixel, start, end, sign;
value = +me.getRightValue(value);
if (reverse) {
start = me.end;
end = me.start;
sign = -1;
} else {
start = me.start;
end = me.end;
sign = 1;
}
if (me.isHorizontal()) {
innerDimension = me.width;
pixel = reverse ? me.right : me.left;
} else {
innerDimension = me.height;
sign *= -1; // invert, since the upper-left corner of the canvas is at pixel (0, 0)
pixel = reverse ? me.top : me.bottom;
}
if (value !== start) {
if (start === 0) { // include zero tick
offset = valueOrDefault$a(tickOpts.fontSize, core_defaults.global.defaultFontSize);
innerDimension -= offset;
start = firstTickValue;
}
if (value !== 0) {
offset += innerDimension / (log10(end) - log10(start)) * (log10(value) - log10(start));
}
pixel += sign * offset;
}
return pixel;
},
getValueForPixel: function(pixel) {
var me = this;
var tickOpts = me.options.ticks;
var reverse = tickOpts.reverse;
var log10 = helpers$1.log10;
var firstTickValue = me._getFirstTickValue(me.minNotZero);
var innerDimension, start, end, value;
if (reverse) {
start = me.end;
end = me.start;
} else {
start = me.start;
end = me.end;
}
if (me.isHorizontal()) {
innerDimension = me.width;
value = reverse ? me.right - pixel : pixel - me.left;
} else {
innerDimension = me.height;
value = reverse ? pixel - me.top : me.bottom - pixel;
}
if (value !== start) {
if (start === 0) { // include zero tick
var offset = valueOrDefault$a(tickOpts.fontSize, core_defaults.global.defaultFontSize);
value -= offset;
innerDimension -= offset;
start = firstTickValue;
}
value *= log10(end) - log10(start);
value /= innerDimension;
value = Math.pow(10, log10(start) + value);
}
return value;
}
});
// INTERNAL: static default options, registered in src/index.js
var _defaults$2 = defaultConfig$2;
scale_logarithmic._defaults = _defaults$2;
var valueOrDefault$b = helpers$1.valueOrDefault;
var valueAtIndexOrDefault$1 = helpers$1.valueAtIndexOrDefault;
var resolve$7 = helpers$1.options.resolve;
var defaultConfig$3 = {
display: true,
// Boolean - Whether to animate scaling the chart from the centre
animate: true,
position: 'chartArea',
angleLines: {
display: true,
color: 'rgba(0, 0, 0, 0.1)',
lineWidth: 1,
borderDash: [],
borderDashOffset: 0.0
},
gridLines: {
circular: false
},
// label settings
ticks: {
// Boolean - Show a backdrop to the scale label
showLabelBackdrop: true,
// String - The colour of the label backdrop
backdropColor: 'rgba(255,255,255,0.75)',
// Number - The backdrop padding above & below the label in pixels
backdropPaddingY: 2,
// Number - The backdrop padding to the side of the label in pixels
backdropPaddingX: 2,
callback: core_ticks.formatters.linear
},
pointLabels: {
// Boolean - if true, show point labels
display: true,
// Number - Point label font size in pixels
fontSize: 10,
// Function - Used to convert point labels
callback: function(label) {
return label;
}
}
};
function getValueCount(scale) {
var opts = scale.options;
return opts.angleLines.display || opts.pointLabels.display ? scale.chart.data.labels.length : 0;
}
function getTickBackdropHeight(opts) {
var tickOpts = opts.ticks;
if (tickOpts.display && opts.display) {
return valueOrDefault$b(tickOpts.fontSize, core_defaults.global.defaultFontSize) + tickOpts.backdropPaddingY * 2;
}
return 0;
}
function measureLabelSize(ctx, lineHeight, label) {
if (helpers$1.isArray(label)) {
return {
w: helpers$1.longestText(ctx, ctx.font, label),
h: label.length * lineHeight
};
}
return {
w: ctx.measureText(label).width,
h: lineHeight
};
}
function determineLimits(angle, pos, size, min, max) {
if (angle === min || angle === max) {
return {
start: pos - (size / 2),
end: pos + (size / 2)
};
} else if (angle < min || angle > max) {
return {
start: pos - size,
end: pos
};
}
return {
start: pos,
end: pos + size
};
}
/**
* Helper function to fit a radial linear scale with point labels
*/
function fitWithPointLabels(scale) {
// Right, this is really confusing and there is a lot of maths going on here
// The gist of the problem is here: https://gist.github.com/nnnick/696cc9c55f4b0beb8fe9
//
// Reaction: https://dl.dropboxusercontent.com/u/34601363/toomuchscience.gif
//
// Solution:
//
// We assume the radius of the polygon is half the size of the canvas at first
// at each index we check if the text overlaps.
//
// Where it does, we store that angle and that index.
//
// After finding the largest index and angle we calculate how much we need to remove
// from the shape radius to move the point inwards by that x.
//
// We average the left and right distances to get the maximum shape radius that can fit in the box
// along with labels.
//
// Once we have that, we can find the centre point for the chart, by taking the x text protrusion
// on each side, removing that from the size, halving it and adding the left x protrusion width.
//
// This will mean we have a shape fitted to the canvas, as large as it can be with the labels
// and position it in the most space efficient manner
//
// https://dl.dropboxusercontent.com/u/34601363/yeahscience.gif
var plFont = helpers$1.options._parseFont(scale.options.pointLabels);
// Get maximum radius of the polygon. Either half the height (minus the text width) or half the width.
// Use this to calculate the offset + change. - Make sure L/R protrusion is at least 0 to stop issues with centre points
var furthestLimits = {
l: 0,
r: scale.width,
t: 0,
b: scale.height - scale.paddingTop
};
var furthestAngles = {};
var i, textSize, pointPosition;
scale.ctx.font = plFont.string;
scale._pointLabelSizes = [];
var valueCount = getValueCount(scale);
for (i = 0; i < valueCount; i++) {
pointPosition = scale.getPointPosition(i, scale.drawingArea + 5);
textSize = measureLabelSize(scale.ctx, plFont.lineHeight, scale.pointLabels[i] || '');
scale._pointLabelSizes[i] = textSize;
// Add quarter circle to make degree 0 mean top of circle
var angleRadians = scale.getIndexAngle(i);
var angle = helpers$1.toDegrees(angleRadians) % 360;
var hLimits = determineLimits(angle, pointPosition.x, textSize.w, 0, 180);
var vLimits = determineLimits(angle, pointPosition.y, textSize.h, 90, 270);
if (hLimits.start < furthestLimits.l) {
furthestLimits.l = hLimits.start;
furthestAngles.l = angleRadians;
}
if (hLimits.end > furthestLimits.r) {
furthestLimits.r = hLimits.end;
furthestAngles.r = angleRadians;
}
if (vLimits.start < furthestLimits.t) {
furthestLimits.t = vLimits.start;
furthestAngles.t = angleRadians;
}
if (vLimits.end > furthestLimits.b) {
furthestLimits.b = vLimits.end;
furthestAngles.b = angleRadians;
}
}
scale.setReductions(scale.drawingArea, furthestLimits, furthestAngles);
}
function getTextAlignForAngle(angle) {
if (angle === 0 || angle === 180) {
return 'center';
} else if (angle < 180) {
return 'left';
}
return 'right';
}
function fillText(ctx, text, position, lineHeight) {
var y = position.y + lineHeight / 2;
var i, ilen;
if (helpers$1.isArray(text)) {
for (i = 0, ilen = text.length; i < ilen; ++i) {
ctx.fillText(text[i], position.x, y);
y += lineHeight;
}
} else {
ctx.fillText(text, position.x, y);
}
}
function adjustPointPositionForLabelHeight(angle, textSize, position) {
if (angle === 90 || angle === 270) {
position.y -= (textSize.h / 2);
} else if (angle > 270 || angle < 90) {
position.y -= textSize.h;
}
}
function drawPointLabels(scale) {
var ctx = scale.ctx;
var opts = scale.options;
var angleLineOpts = opts.angleLines;
var gridLineOpts = opts.gridLines;
var pointLabelOpts = opts.pointLabels;
var lineWidth = valueOrDefault$b(angleLineOpts.lineWidth, gridLineOpts.lineWidth);
var lineColor = valueOrDefault$b(angleLineOpts.color, gridLineOpts.color);
var tickBackdropHeight = getTickBackdropHeight(opts);
ctx.save();
ctx.lineWidth = lineWidth;
ctx.strokeStyle = lineColor;
if (ctx.setLineDash) {
ctx.setLineDash(resolve$7([angleLineOpts.borderDash, gridLineOpts.borderDash, []]));
ctx.lineDashOffset = resolve$7([angleLineOpts.borderDashOffset, gridLineOpts.borderDashOffset, 0.0]);
}
var outerDistance = scale.getDistanceFromCenterForValue(opts.ticks.reverse ? scale.min : scale.max);
// Point Label Font
var plFont = helpers$1.options._parseFont(pointLabelOpts);
ctx.font = plFont.string;
ctx.textBaseline = 'middle';
for (var i = getValueCount(scale) - 1; i >= 0; i--) {
if (angleLineOpts.display && lineWidth && lineColor) {
var outerPosition = scale.getPointPosition(i, outerDistance);
ctx.beginPath();
ctx.moveTo(scale.xCenter, scale.yCenter);
ctx.lineTo(outerPosition.x, outerPosition.y);
ctx.stroke();
}
if (pointLabelOpts.display) {
// Extra pixels out for some label spacing
var extra = (i === 0 ? tickBackdropHeight / 2 : 0);
var pointLabelPosition = scale.getPointPosition(i, outerDistance + extra + 5);
// Keep this in loop since we may support array properties here
var pointLabelFontColor = valueAtIndexOrDefault$1(pointLabelOpts.fontColor, i, core_defaults.global.defaultFontColor);
ctx.fillStyle = pointLabelFontColor;
var angleRadians = scale.getIndexAngle(i);
var angle = helpers$1.toDegrees(angleRadians);
ctx.textAlign = getTextAlignForAngle(angle);
adjustPointPositionForLabelHeight(angle, scale._pointLabelSizes[i], pointLabelPosition);
fillText(ctx, scale.pointLabels[i] || '', pointLabelPosition, plFont.lineHeight);
}
}
ctx.restore();
}
function drawRadiusLine(scale, gridLineOpts, radius, index) {
var ctx = scale.ctx;
var circular = gridLineOpts.circular;
var valueCount = getValueCount(scale);
var lineColor = valueAtIndexOrDefault$1(gridLineOpts.color, index - 1);
var lineWidth = valueAtIndexOrDefault$1(gridLineOpts.lineWidth, index - 1);
var pointPosition;
if ((!circular && !valueCount) || !lineColor || !lineWidth) {
return;
}
ctx.save();
ctx.strokeStyle = lineColor;
ctx.lineWidth = lineWidth;
if (ctx.setLineDash) {
ctx.setLineDash(gridLineOpts.borderDash || []);
ctx.lineDashOffset = gridLineOpts.borderDashOffset || 0.0;
}
ctx.beginPath();
if (circular) {
// Draw circular arcs between the points
ctx.arc(scale.xCenter, scale.yCenter, radius, 0, Math.PI * 2);
} else {
// Draw straight lines connecting each index
pointPosition = scale.getPointPosition(0, radius);
ctx.moveTo(pointPosition.x, pointPosition.y);
for (var i = 1; i < valueCount; i++) {
pointPosition = scale.getPointPosition(i, radius);
ctx.lineTo(pointPosition.x, pointPosition.y);
}
}
ctx.closePath();
ctx.stroke();
ctx.restore();
}
function numberOrZero(param) {
return helpers$1.isNumber(param) ? param : 0;
}
var scale_radialLinear = scale_linearbase.extend({
setDimensions: function() {
var me = this;
// Set the unconstrained dimension before label rotation
me.width = me.maxWidth;
me.height = me.maxHeight;
me.paddingTop = getTickBackdropHeight(me.options) / 2;
me.xCenter = Math.floor(me.width / 2);
me.yCenter = Math.floor((me.height - me.paddingTop) / 2);
me.drawingArea = Math.min(me.height - me.paddingTop, me.width) / 2;
},
determineDataLimits: function() {
var me = this;
var chart = me.chart;
var min = Number.POSITIVE_INFINITY;
var max = Number.NEGATIVE_INFINITY;
helpers$1.each(chart.data.datasets, function(dataset, datasetIndex) {
if (chart.isDatasetVisible(datasetIndex)) {
var meta = chart.getDatasetMeta(datasetIndex);
helpers$1.each(dataset.data, function(rawValue, index) {
var value = +me.getRightValue(rawValue);
if (isNaN(value) || meta.data[index].hidden) {
return;
}
min = Math.min(value, min);
max = Math.max(value, max);
});
}
});
me.min = (min === Number.POSITIVE_INFINITY ? 0 : min);
me.max = (max === Number.NEGATIVE_INFINITY ? 0 : max);
// Common base implementation to handle ticks.min, ticks.max, ticks.beginAtZero
me.handleTickRangeOptions();
},
// Returns the maximum number of ticks based on the scale dimension
_computeTickLimit: function() {
return Math.ceil(this.drawingArea / getTickBackdropHeight(this.options));
},
convertTicksToLabels: function() {
var me = this;
scale_linearbase.prototype.convertTicksToLabels.call(me);
// Point labels
me.pointLabels = me.chart.data.labels.map(me.options.pointLabels.callback, me);
},
getLabelForIndex: function(index, datasetIndex) {
return +this.getRightValue(this.chart.data.datasets[datasetIndex].data[index]);
},
fit: function() {
var me = this;
var opts = me.options;
if (opts.display && opts.pointLabels.display) {
fitWithPointLabels(me);
} else {
me.setCenterPoint(0, 0, 0, 0);
}
},
/**
* Set radius reductions and determine new radius and center point
* @private
*/
setReductions: function(largestPossibleRadius, furthestLimits, furthestAngles) {
var me = this;
var radiusReductionLeft = furthestLimits.l / Math.sin(furthestAngles.l);
var radiusReductionRight = Math.max(furthestLimits.r - me.width, 0) / Math.sin(furthestAngles.r);
var radiusReductionTop = -furthestLimits.t / Math.cos(furthestAngles.t);
var radiusReductionBottom = -Math.max(furthestLimits.b - (me.height - me.paddingTop), 0) / Math.cos(furthestAngles.b);
radiusReductionLeft = numberOrZero(radiusReductionLeft);
radiusReductionRight = numberOrZero(radiusReductionRight);
radiusReductionTop = numberOrZero(radiusReductionTop);
radiusReductionBottom = numberOrZero(radiusReductionBottom);
me.drawingArea = Math.min(
Math.floor(largestPossibleRadius - (radiusReductionLeft + radiusReductionRight) / 2),
Math.floor(largestPossibleRadius - (radiusReductionTop + radiusReductionBottom) / 2));
me.setCenterPoint(radiusReductionLeft, radiusReductionRight, radiusReductionTop, radiusReductionBottom);
},
setCenterPoint: function(leftMovement, rightMovement, topMovement, bottomMovement) {
var me = this;
var maxRight = me.width - rightMovement - me.drawingArea;
var maxLeft = leftMovement + me.drawingArea;
var maxTop = topMovement + me.drawingArea;
var maxBottom = (me.height - me.paddingTop) - bottomMovement - me.drawingArea;
me.xCenter = Math.floor(((maxLeft + maxRight) / 2) + me.left);
me.yCenter = Math.floor(((maxTop + maxBottom) / 2) + me.top + me.paddingTop);
},
getIndexAngle: function(index) {
var angleMultiplier = (Math.PI * 2) / getValueCount(this);
var startAngle = this.chart.options && this.chart.options.startAngle ?
this.chart.options.startAngle :
0;
var startAngleRadians = startAngle * Math.PI * 2 / 360;
// Start from the top instead of right, so remove a quarter of the circle
return index * angleMultiplier + startAngleRadians;
},
getDistanceFromCenterForValue: function(value) {
var me = this;
if (value === null) {
return 0; // null always in center
}
// Take into account half font size + the yPadding of the top value
var scalingFactor = me.drawingArea / (me.max - me.min);
if (me.options.ticks.reverse) {
return (me.max - value) * scalingFactor;
}
return (value - me.min) * scalingFactor;
},
getPointPosition: function(index, distanceFromCenter) {
var me = this;
var thisAngle = me.getIndexAngle(index) - (Math.PI / 2);
return {
x: Math.cos(thisAngle) * distanceFromCenter + me.xCenter,
y: Math.sin(thisAngle) * distanceFromCenter + me.yCenter
};
},
getPointPositionForValue: function(index, value) {
return this.getPointPosition(index, this.getDistanceFromCenterForValue(value));
},
getBasePosition: function() {
var me = this;
var min = me.min;
var max = me.max;
return me.getPointPositionForValue(0,
me.beginAtZero ? 0 :
min < 0 && max < 0 ? max :
min > 0 && max > 0 ? min :
0);
},
draw: function() {
var me = this;
var opts = me.options;
var gridLineOpts = opts.gridLines;
var tickOpts = opts.ticks;
if (opts.display) {
var ctx = me.ctx;
var startAngle = this.getIndexAngle(0);
var tickFont = helpers$1.options._parseFont(tickOpts);
if (opts.angleLines.display || opts.pointLabels.display) {
drawPointLabels(me);
}
helpers$1.each(me.ticks, function(label, index) {
// Don't draw a centre value (if it is minimum)
if (index > 0 || tickOpts.reverse) {
var yCenterOffset = me.getDistanceFromCenterForValue(me.ticksAsNumbers[index]);
// Draw circular lines around the scale
if (gridLineOpts.display && index !== 0) {
drawRadiusLine(me, gridLineOpts, yCenterOffset, index);
}
if (tickOpts.display) {
var tickFontColor = valueOrDefault$b(tickOpts.fontColor, core_defaults.global.defaultFontColor);
ctx.font = tickFont.string;
ctx.save();
ctx.translate(me.xCenter, me.yCenter);
ctx.rotate(startAngle);
if (tickOpts.showLabelBackdrop) {
var labelWidth = ctx.measureText(label).width;
ctx.fillStyle = tickOpts.backdropColor;
ctx.fillRect(
-labelWidth / 2 - tickOpts.backdropPaddingX,
-yCenterOffset - tickFont.size / 2 - tickOpts.backdropPaddingY,
labelWidth + tickOpts.backdropPaddingX * 2,
tickFont.size + tickOpts.backdropPaddingY * 2
);
}
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
ctx.fillStyle = tickFontColor;
ctx.fillText(label, 0, -yCenterOffset);
ctx.restore();
}
}
});
}
}
});
// INTERNAL: static default options, registered in src/index.js
var _defaults$3 = defaultConfig$3;
scale_radialLinear._defaults = _defaults$3;
var valueOrDefault$c = helpers$1.valueOrDefault;
// Integer constants are from the ES6 spec.
var MIN_INTEGER = Number.MIN_SAFE_INTEGER || -9007199254740991;
var MAX_INTEGER = Number.MAX_SAFE_INTEGER || 9007199254740991;
var INTERVALS = {
millisecond: {
common: true,
size: 1,
steps: [1, 2, 5, 10, 20, 50, 100, 250, 500]
},
second: {
common: true,
size: 1000,
steps: [1, 2, 5, 10, 15, 30]
},
minute: {
common: true,
size: 60000,
steps: [1, 2, 5, 10, 15, 30]
},
hour: {
common: true,
size: 3600000,
steps: [1, 2, 3, 6, 12]
},
day: {
common: true,
size: 86400000,
steps: [1, 2, 5]
},
week: {
common: false,
size: 604800000,
steps: [1, 2, 3, 4]
},
month: {
common: true,
size: 2.628e9,
steps: [1, 2, 3]
},
quarter: {
common: false,
size: 7.884e9,
steps: [1, 2, 3, 4]
},
year: {
common: true,
size: 3.154e10
}
};
var UNITS = Object.keys(INTERVALS);
function sorter(a, b) {
return a - b;
}
function arrayUnique(items) {
var hash = {};
var out = [];
var i, ilen, item;
for (i = 0, ilen = items.length; i < ilen; ++i) {
item = items[i];
if (!hash[item]) {
hash[item] = true;
out.push(item);
}
}
return out;
}
/**
* Returns an array of {time, pos} objects used to interpolate a specific `time` or position
* (`pos`) on the scale, by searching entries before and after the requested value. `pos` is
* a decimal between 0 and 1: 0 being the start of the scale (left or top) and 1 the other
* extremity (left + width or top + height). Note that it would be more optimized to directly
* store pre-computed pixels, but the scale dimensions are not guaranteed at the time we need
* to create the lookup table. The table ALWAYS contains at least two items: min and max.
*
* @param {number[]} timestamps - timestamps sorted from lowest to highest.
* @param {string} distribution - If 'linear', timestamps will be spread linearly along the min
* and max range, so basically, the table will contains only two items: {min, 0} and {max, 1}.
* If 'series', timestamps will be positioned at the same distance from each other. In this
* case, only timestamps that break the time linearity are registered, meaning that in the
* best case, all timestamps are linear, the table contains only min and max.
*/
function buildLookupTable(timestamps, min, max, distribution) {
if (distribution === 'linear' || !timestamps.length) {
return [
{time: min, pos: 0},
{time: max, pos: 1}
];
}
var table = [];
var items = [min];
var i, ilen, prev, curr, next;
for (i = 0, ilen = timestamps.length; i < ilen; ++i) {
curr = timestamps[i];
if (curr > min && curr < max) {
items.push(curr);
}
}
items.push(max);
for (i = 0, ilen = items.length; i < ilen; ++i) {
next = items[i + 1];
prev = items[i - 1];
curr = items[i];
// only add points that breaks the scale linearity
if (prev === undefined || next === undefined || Math.round((next + prev) / 2) !== curr) {
table.push({time: curr, pos: i / (ilen - 1)});
}
}
return table;
}
// @see adapted from https://www.anujgakhar.com/2014/03/01/binary-search-in-javascript/
function lookup(table, key, value) {
var lo = 0;
var hi = table.length - 1;
var mid, i0, i1;
while (lo >= 0 && lo <= hi) {
mid = (lo + hi) >> 1;
i0 = table[mid - 1] || null;
i1 = table[mid];
if (!i0) {
// given value is outside table (before first item)
return {lo: null, hi: i1};
} else if (i1[key] < value) {
lo = mid + 1;
} else if (i0[key] > value) {
hi = mid - 1;
} else {
return {lo: i0, hi: i1};
}
}
// given value is outside table (after last item)
return {lo: i1, hi: null};
}
/**
* Linearly interpolates the given source `value` using the table items `skey` values and
* returns the associated `tkey` value. For example, interpolate(table, 'time', 42, 'pos')
* returns the position for a timestamp equal to 42. If value is out of bounds, values at
* index [0, 1] or [n - 1, n] are used for the interpolation.
*/
function interpolate$1(table, skey, sval, tkey) {
var range = lookup(table, skey, sval);
// Note: the lookup table ALWAYS contains at least 2 items (min and max)
var prev = !range.lo ? table[0] : !range.hi ? table[table.length - 2] : range.lo;
var next = !range.lo ? table[1] : !range.hi ? table[table.length - 1] : range.hi;
var span = next[skey] - prev[skey];
var ratio = span ? (sval - prev[skey]) / span : 0;
var offset = (next[tkey] - prev[tkey]) * ratio;
return prev[tkey] + offset;
}
function toTimestamp(scale, input) {
var adapter = scale._adapter;
var options = scale.options.time;
var parser = options.parser;
var format = parser || options.format;
var value = input;
if (typeof parser === 'function') {
value = parser(value);
}
// Only parse if its not a timestamp already
if (!helpers$1.isFinite(value)) {
value = typeof format === 'string'
? adapter.parse(value, format)
: adapter.parse(value);
}
if (value !== null) {
return +value;
}
// Labels are in an incompatible format and no `parser` has been provided.
// The user might still use the deprecated `format` option for parsing.
if (!parser && typeof format === 'function') {
value = format(input);
// `format` could return something else than a timestamp, if so, parse it
if (!helpers$1.isFinite(value)) {
value = adapter.parse(value);
}
}
return value;
}
function parse(scale, input) {
if (helpers$1.isNullOrUndef(input)) {
return null;
}
var options = scale.options.time;
var value = toTimestamp(scale, scale.getRightValue(input));
if (value === null) {
return value;
}
if (options.round) {
value = +scale._adapter.startOf(value, options.round);
}
return value;
}
/**
* Returns the number of unit to skip to be able to display up to `capacity` number of ticks
* in `unit` for the given `min` / `max` range and respecting the interval steps constraints.
*/
function determineStepSize(min, max, unit, capacity) {
var range = max - min;
var interval = INTERVALS[unit];
var milliseconds = interval.size;
var steps = interval.steps;
var i, ilen, factor;
if (!steps) {
return Math.ceil(range / (capacity * milliseconds));
}
for (i = 0, ilen = steps.length; i < ilen; ++i) {
factor = steps[i];
if (Math.ceil(range / (milliseconds * factor)) <= capacity) {
break;
}
}
return factor;
}
/**
* Figures out what unit results in an appropriate number of auto-generated ticks
*/
function determineUnitForAutoTicks(minUnit, min, max, capacity) {
var ilen = UNITS.length;
var i, interval, factor;
for (i = UNITS.indexOf(minUnit); i < ilen - 1; ++i) {
interval = INTERVALS[UNITS[i]];
factor = interval.steps ? interval.steps[interval.steps.length - 1] : MAX_INTEGER;
if (interval.common && Math.ceil((max - min) / (factor * interval.size)) <= capacity) {
return UNITS[i];
}
}
return UNITS[ilen - 1];
}
/**
* Figures out what unit to format a set of ticks with
*/
function determineUnitForFormatting(scale, ticks, minUnit, min, max) {
var ilen = UNITS.length;
var i, unit;
for (i = ilen - 1; i >= UNITS.indexOf(minUnit); i--) {
unit = UNITS[i];
if (INTERVALS[unit].common && scale._adapter.diff(max, min, unit) >= ticks.length) {
return unit;
}
}
return UNITS[minUnit ? UNITS.indexOf(minUnit) : 0];
}
function determineMajorUnit(unit) {
for (var i = UNITS.indexOf(unit) + 1, ilen = UNITS.length; i < ilen; ++i) {
if (INTERVALS[UNITS[i]].common) {
return UNITS[i];
}
}
}
/**
* Generates a maximum of `capacity` timestamps between min and max, rounded to the
* `minor` unit, aligned on the `major` unit and using the given scale time `options`.
* Important: this method can return ticks outside the min and max range, it's the
* responsibility of the calling code to clamp values if needed.
*/
function generate(scale, min, max, capacity) {
var adapter = scale._adapter;
var options = scale.options;
var timeOpts = options.time;
var minor = timeOpts.unit || determineUnitForAutoTicks(timeOpts.minUnit, min, max, capacity);
var major = determineMajorUnit(minor);
var stepSize = valueOrDefault$c(timeOpts.stepSize, timeOpts.unitStepSize);
var weekday = minor === 'week' ? timeOpts.isoWeekday : false;
var majorTicksEnabled = options.ticks.major.enabled;
var interval = INTERVALS[minor];
var first = min;
var last = max;
var ticks = [];
var time;
if (!stepSize) {
stepSize = determineStepSize(min, max, minor, capacity);
}
// For 'week' unit, handle the first day of week option
if (weekday) {
first = +adapter.startOf(first, 'isoWeek', weekday);
last = +adapter.startOf(last, 'isoWeek', weekday);
}
// Align first/last ticks on unit
first = +adapter.startOf(first, weekday ? 'day' : minor);
last = +adapter.startOf(last, weekday ? 'day' : minor);
// Make sure that the last tick include max
if (last < max) {
last = +adapter.add(last, 1, minor);
}
time = first;
if (majorTicksEnabled && major && !weekday && !timeOpts.round) {
// Align the first tick on the previous `minor` unit aligned on the `major` unit:
// we first aligned time on the previous `major` unit then add the number of full
// stepSize there is between first and the previous major time.
time = +adapter.startOf(time, major);
time = +adapter.add(time, ~~((first - time) / (interval.size * stepSize)) * stepSize, minor);
}
for (; time < last; time = +adapter.add(time, stepSize, minor)) {
ticks.push(+time);
}
ticks.push(+time);
return ticks;
}
/**
* Returns the start and end offsets from edges in the form of {start, end}
* where each value is a relative width to the scale and ranges between 0 and 1.
* They add extra margins on the both sides by scaling down the original scale.
* Offsets are added when the `offset` option is true.
*/
function computeOffsets(table, ticks, min, max, options) {
var start = 0;
var end = 0;
var first, last;
if (options.offset && ticks.length) {
if (!options.time.min) {
first = interpolate$1(table, 'time', ticks[0], 'pos');
if (ticks.length === 1) {
start = 1 - first;
} else {
start = (interpolate$1(table, 'time', ticks[1], 'pos') - first) / 2;
}
}
if (!options.time.max) {
last = interpolate$1(table, 'time', ticks[ticks.length - 1], 'pos');
if (ticks.length === 1) {
end = last;
} else {
end = (last - interpolate$1(table, 'time', ticks[ticks.length - 2], 'pos')) / 2;
}
}
}
return {start: start, end: end};
}
function ticksFromTimestamps(scale, values, majorUnit) {
var ticks = [];
var i, ilen, value, major;
for (i = 0, ilen = values.length; i < ilen; ++i) {
value = values[i];
major = majorUnit ? value === +scale._adapter.startOf(value, majorUnit) : false;
ticks.push({
value: value,
major: major
});
}
return ticks;
}
var defaultConfig$4 = {
position: 'bottom',
/**
* Data distribution along the scale:
* - 'linear': data are spread according to their time (distances can vary),
* - 'series': data are spread at the same distance from each other.
* @see https://github.com/chartjs/Chart.js/pull/4507
* @since 2.7.0
*/
distribution: 'linear',
/**
* Scale boundary strategy (bypassed by min/max time options)
* - `data`: make sure data are fully visible, ticks outside are removed
* - `ticks`: make sure ticks are fully visible, data outside are truncated
* @see https://github.com/chartjs/Chart.js/pull/4556
* @since 2.7.0
*/
bounds: 'data',
adapters: {},
time: {
parser: false, // false == a pattern string from https://momentjs.com/docs/#/parsing/string-format/ or a custom callback that converts its argument to a moment
format: false, // DEPRECATED false == date objects, moment object, callback or a pattern string from https://momentjs.com/docs/#/parsing/string-format/
unit: false, // false == automatic or override with week, month, year, etc.
round: false, // none, or override with week, month, year, etc.
displayFormat: false, // DEPRECATED
isoWeekday: false, // override week start day - see https://momentjs.com/docs/#/get-set/iso-weekday/
minUnit: 'millisecond',
displayFormats: {}
},
ticks: {
autoSkip: false,
/**
* Ticks generation input values:
* - 'auto': generates "optimal" ticks based on scale size and time options.
* - 'data': generates ticks from data (including labels from data {t|x|y} objects).
* - 'labels': generates ticks from user given `data.labels` values ONLY.
* @see https://github.com/chartjs/Chart.js/pull/4507
* @since 2.7.0
*/
source: 'auto',
major: {
enabled: false
}
}
};
var scale_time = core_scale.extend({
initialize: function() {
this.mergeTicksOptions();
core_scale.prototype.initialize.call(this);
},
update: function() {
var me = this;
var options = me.options;
var time = options.time || (options.time = {});
var adapter = me._adapter = new core_adapters._date(options.adapters.date);
// DEPRECATIONS: output a message only one time per update
if (time.format) {
console.warn('options.time.format is deprecated and replaced by options.time.parser.');
}
// Backward compatibility: before introducing adapter, `displayFormats` was
// supposed to contain *all* unit/string pairs but this can't be resolved
// when loading the scale (adapters are loaded afterward), so let's populate
// missing formats on update
helpers$1.mergeIf(time.displayFormats, adapter.formats());
return core_scale.prototype.update.apply(me, arguments);
},
/**
* Allows data to be referenced via 't' attribute
*/
getRightValue: function(rawValue) {
if (rawValue && rawValue.t !== undefined) {
rawValue = rawValue.t;
}
return core_scale.prototype.getRightValue.call(this, rawValue);
},
determineDataLimits: function() {
var me = this;
var chart = me.chart;
var adapter = me._adapter;
var timeOpts = me.options.time;
var unit = timeOpts.unit || 'day';
var min = MAX_INTEGER;
var max = MIN_INTEGER;
var timestamps = [];
var datasets = [];
var labels = [];
var i, j, ilen, jlen, data, timestamp;
var dataLabels = chart.data.labels || [];
// Convert labels to timestamps
for (i = 0, ilen = dataLabels.length; i < ilen; ++i) {
labels.push(parse(me, dataLabels[i]));
}
// Convert data to timestamps
for (i = 0, ilen = (chart.data.datasets || []).length; i < ilen; ++i) {
if (chart.isDatasetVisible(i)) {
data = chart.data.datasets[i].data;
// Let's consider that all data have the same format.
if (helpers$1.isObject(data[0])) {
datasets[i] = [];
for (j = 0, jlen = data.length; j < jlen; ++j) {
timestamp = parse(me, data[j]);
timestamps.push(timestamp);
datasets[i][j] = timestamp;
}
} else {
for (j = 0, jlen = labels.length; j < jlen; ++j) {
timestamps.push(labels[j]);
}
datasets[i] = labels.slice(0);
}
} else {
datasets[i] = [];
}
}
if (labels.length) {
// Sort labels **after** data have been converted
labels = arrayUnique(labels).sort(sorter);
min = Math.min(min, labels[0]);
max = Math.max(max, labels[labels.length - 1]);
}
if (timestamps.length) {
timestamps = arrayUnique(timestamps).sort(sorter);
min = Math.min(min, timestamps[0]);
max = Math.max(max, timestamps[timestamps.length - 1]);
}
min = parse(me, timeOpts.min) || min;
max = parse(me, timeOpts.max) || max;
// In case there is no valid min/max, set limits based on unit time option
min = min === MAX_INTEGER ? +adapter.startOf(Date.now(), unit) : min;
max = max === MIN_INTEGER ? +adapter.endOf(Date.now(), unit) + 1 : max;
// Make sure that max is strictly higher than min (required by the lookup table)
me.min = Math.min(min, max);
me.max = Math.max(min + 1, max);
// PRIVATE
me._horizontal = me.isHorizontal();
me._table = [];
me._timestamps = {
data: timestamps,
datasets: datasets,
labels: labels
};
},
buildTicks: function() {
var me = this;
var min = me.min;
var max = me.max;
var options = me.options;
var timeOpts = options.time;
var timestamps = [];
var ticks = [];
var i, ilen, timestamp;
switch (options.ticks.source) {
case 'data':
timestamps = me._timestamps.data;
break;
case 'labels':
timestamps = me._timestamps.labels;
break;
case 'auto':
default:
timestamps = generate(me, min, max, me.getLabelCapacity(min), options);
}
if (options.bounds === 'ticks' && timestamps.length) {
min = timestamps[0];
max = timestamps[timestamps.length - 1];
}
// Enforce limits with user min/max options
min = parse(me, timeOpts.min) || min;
max = parse(me, timeOpts.max) || max;
// Remove ticks outside the min/max range
for (i = 0, ilen = timestamps.length; i < ilen; ++i) {
timestamp = timestamps[i];
if (timestamp >= min && timestamp <= max) {
ticks.push(timestamp);
}
}
me.min = min;
me.max = max;
// PRIVATE
me._unit = timeOpts.unit || determineUnitForFormatting(me, ticks, timeOpts.minUnit, me.min, me.max);
me._majorUnit = determineMajorUnit(me._unit);
me._table = buildLookupTable(me._timestamps.data, min, max, options.distribution);
me._offsets = computeOffsets(me._table, ticks, min, max, options);
if (options.ticks.reverse) {
ticks.reverse();
}
return ticksFromTimestamps(me, ticks, me._majorUnit);
},
getLabelForIndex: function(index, datasetIndex) {
var me = this;
var adapter = me._adapter;
var data = me.chart.data;
var timeOpts = me.options.time;
var label = data.labels && index < data.labels.length ? data.labels[index] : '';
var value = data.datasets[datasetIndex].data[index];
if (helpers$1.isObject(value)) {
label = me.getRightValue(value);
}
if (timeOpts.tooltipFormat) {
return adapter.format(toTimestamp(me, label), timeOpts.tooltipFormat);
}
if (typeof label === 'string') {
return label;
}
return adapter.format(toTimestamp(me, label), timeOpts.displayFormats.datetime);
},
/**
* Function to format an individual tick mark
* @private
*/
tickFormatFunction: function(time, index, ticks, format) {
var me = this;
var adapter = me._adapter;
var options = me.options;
var formats = options.time.displayFormats;
var minorFormat = formats[me._unit];
var majorUnit = me._majorUnit;
var majorFormat = formats[majorUnit];
var majorTime = +adapter.startOf(time, majorUnit);
var majorTickOpts = options.ticks.major;
var major = majorTickOpts.enabled && majorUnit && majorFormat && time === majorTime;
var label = adapter.format(time, format ? format : major ? majorFormat : minorFormat);
var tickOpts = major ? majorTickOpts : options.ticks.minor;
var formatter = valueOrDefault$c(tickOpts.callback, tickOpts.userCallback);
return formatter ? formatter(label, index, ticks) : label;
},
convertTicksToLabels: function(ticks) {
var labels = [];
var i, ilen;
for (i = 0, ilen = ticks.length; i < ilen; ++i) {
labels.push(this.tickFormatFunction(ticks[i].value, i, ticks));
}
return labels;
},
/**
* @private
*/
getPixelForOffset: function(time) {
var me = this;
var isReverse = me.options.ticks.reverse;
var size = me._horizontal ? me.width : me.height;
var start = me._horizontal ? isReverse ? me.right : me.left : isReverse ? me.bottom : me.top;
var pos = interpolate$1(me._table, 'time', time, 'pos');
var offset = size * (me._offsets.start + pos) / (me._offsets.start + 1 + me._offsets.end);
return isReverse ? start - offset : start + offset;
},
getPixelForValue: function(value, index, datasetIndex) {
var me = this;
var time = null;
if (index !== undefined && datasetIndex !== undefined) {
time = me._timestamps.datasets[datasetIndex][index];
}
if (time === null) {
time = parse(me, value);
}
if (time !== null) {
return me.getPixelForOffset(time);
}
},
getPixelForTick: function(index) {
var ticks = this.getTicks();
return index >= 0 && index < ticks.length ?
this.getPixelForOffset(ticks[index].value) :
null;
},
getValueForPixel: function(pixel) {
var me = this;
var size = me._horizontal ? me.width : me.height;
var start = me._horizontal ? me.left : me.top;
var pos = (size ? (pixel - start) / size : 0) * (me._offsets.start + 1 + me._offsets.start) - me._offsets.end;
var time = interpolate$1(me._table, 'pos', pos, 'time');
// DEPRECATION, we should return time directly
return me._adapter._create(time);
},
/**
* Crude approximation of what the label width might be
* @private
*/
getLabelWidth: function(label) {
var me = this;
var ticksOpts = me.options.ticks;
var tickLabelWidth = me.ctx.measureText(label).width;
var angle = helpers$1.toRadians(ticksOpts.maxRotation);
var cosRotation = Math.cos(angle);
var sinRotation = Math.sin(angle);
var tickFontSize = valueOrDefault$c(ticksOpts.fontSize, core_defaults.global.defaultFontSize);
return (tickLabelWidth * cosRotation) + (tickFontSize * sinRotation);
},
/**
* @private
*/
getLabelCapacity: function(exampleTime) {
var me = this;
// pick the longest format (milliseconds) for guestimation
var format = me.options.time.displayFormats.millisecond;
var exampleLabel = me.tickFormatFunction(exampleTime, 0, [], format);
var tickLabelWidth = me.getLabelWidth(exampleLabel);
var innerWidth = me.isHorizontal() ? me.width : me.height;
var capacity = Math.floor(innerWidth / tickLabelWidth);
return capacity > 0 ? capacity : 1;
}
});
// INTERNAL: static default options, registered in src/index.js
var _defaults$4 = defaultConfig$4;
scale_time._defaults = _defaults$4;
var scales = {
category: scale_category,
linear: scale_linear,
logarithmic: scale_logarithmic,
radialLinear: scale_radialLinear,
time: scale_time
};
var FORMATS = {
datetime: 'MMM D, YYYY, h:mm:ss a',
millisecond: 'h:mm:ss.SSS a',
second: 'h:mm:ss a',
minute: 'h:mm a',
hour: 'hA',
day: 'MMM D',
week: 'll',
month: 'MMM YYYY',
quarter: '[Q]Q - YYYY',
year: 'YYYY'
};
core_adapters._date.override(typeof moment === 'function' ? {
_id: 'moment', // DEBUG ONLY
formats: function() {
return FORMATS;
},
parse: function(value, format) {
if (typeof value === 'string' && typeof format === 'string') {
value = moment(value, format);
} else if (!(value instanceof moment)) {
value = moment(value);
}
return value.isValid() ? value.valueOf() : null;
},
format: function(time, format) {
return moment(time).format(format);
},
add: function(time, amount, unit) {
return moment(time).add(amount, unit).valueOf();
},
diff: function(max, min, unit) {
return moment.duration(moment(max).diff(moment(min))).as(unit);
},
startOf: function(time, unit, weekday) {
time = moment(time);
if (unit === 'isoWeek') {
return time.isoWeekday(weekday).valueOf();
}
return time.startOf(unit).valueOf();
},
endOf: function(time, unit) {
return moment(time).endOf(unit).valueOf();
},
// DEPRECATIONS
/**
* Provided for backward compatibility with scale.getValueForPixel().
* @deprecated since version 2.8.0
* @todo remove at version 3
* @private
*/
_create: function(time) {
return moment(time);
},
} : {});
core_defaults._set('global', {
plugins: {
filler: {
propagate: true
}
}
});
var mappers = {
dataset: function(source) {
var index = source.fill;
var chart = source.chart;
var meta = chart.getDatasetMeta(index);
var visible = meta && chart.isDatasetVisible(index);
var points = (visible && meta.dataset._children) || [];
var length = points.length || 0;
return !length ? null : function(point, i) {
return (i < length && points[i]._view) || null;
};
},
boundary: function(source) {
var boundary = source.boundary;
var x = boundary ? boundary.x : null;
var y = boundary ? boundary.y : null;
return function(point) {
return {
x: x === null ? point.x : x,
y: y === null ? point.y : y,
};
};
}
};
// @todo if (fill[0] === '#')
function decodeFill(el, index, count) {
var model = el._model || {};
var fill = model.fill;
var target;
if (fill === undefined) {
fill = !!model.backgroundColor;
}
if (fill === false || fill === null) {
return false;
}
if (fill === true) {
return 'origin';
}
target = parseFloat(fill, 10);
if (isFinite(target) && Math.floor(target) === target) {
if (fill[0] === '-' || fill[0] === '+') {
target = index + target;
}
if (target === index || target < 0 || target >= count) {
return false;
}
return target;
}
switch (fill) {
// compatibility
case 'bottom':
return 'start';
case 'top':
return 'end';
case 'zero':
return 'origin';
// supported boundaries
case 'origin':
case 'start':
case 'end':
return fill;
// invalid fill values
default:
return false;
}
}
function computeBoundary(source) {
var model = source.el._model || {};
var scale = source.el._scale || {};
var fill = source.fill;
var target = null;
var horizontal;
if (isFinite(fill)) {
return null;
}
// Backward compatibility: until v3, we still need to support boundary values set on
// the model (scaleTop, scaleBottom and scaleZero) because some external plugins and
// controllers might still use it (e.g. the Smith chart).
if (fill === 'start') {
target = model.scaleBottom === undefined ? scale.bottom : model.scaleBottom;
} else if (fill === 'end') {
target = model.scaleTop === undefined ? scale.top : model.scaleTop;
} else if (model.scaleZero !== undefined) {
target = model.scaleZero;
} else if (scale.getBasePosition) {
target = scale.getBasePosition();
} else if (scale.getBasePixel) {
target = scale.getBasePixel();
}
if (target !== undefined && target !== null) {
if (target.x !== undefined && target.y !== undefined) {
return target;
}
if (helpers$1.isFinite(target)) {
horizontal = scale.isHorizontal();
return {
x: horizontal ? target : null,
y: horizontal ? null : target
};
}
}
return null;
}
function resolveTarget(sources, index, propagate) {
var source = sources[index];
var fill = source.fill;
var visited = [index];
var target;
if (!propagate) {
return fill;
}
while (fill !== false && visited.indexOf(fill) === -1) {
if (!isFinite(fill)) {
return fill;
}
target = sources[fill];
if (!target) {
return false;
}
if (target.visible) {
return fill;
}
visited.push(fill);
fill = target.fill;
}
return false;
}
function createMapper(source) {
var fill = source.fill;
var type = 'dataset';
if (fill === false) {
return null;
}
if (!isFinite(fill)) {
type = 'boundary';
}
return mappers[type](source);
}
function isDrawable(point) {
return point && !point.skip;
}
function drawArea(ctx, curve0, curve1, len0, len1) {
var i;
if (!len0 || !len1) {
return;
}
// building first area curve (normal)
ctx.moveTo(curve0[0].x, curve0[0].y);
for (i = 1; i < len0; ++i) {
helpers$1.canvas.lineTo(ctx, curve0[i - 1], curve0[i]);
}
// joining the two area curves
ctx.lineTo(curve1[len1 - 1].x, curve1[len1 - 1].y);
// building opposite area curve (reverse)
for (i = len1 - 1; i > 0; --i) {
helpers$1.canvas.lineTo(ctx, curve1[i], curve1[i - 1], true);
}
}
function doFill(ctx, points, mapper, view, color, loop) {
var count = points.length;
var span = view.spanGaps;
var curve0 = [];
var curve1 = [];
var len0 = 0;
var len1 = 0;
var i, ilen, index, p0, p1, d0, d1;
ctx.beginPath();
for (i = 0, ilen = (count + !!loop); i < ilen; ++i) {
index = i % count;
p0 = points[index]._view;
p1 = mapper(p0, index, view);
d0 = isDrawable(p0);
d1 = isDrawable(p1);
if (d0 && d1) {
len0 = curve0.push(p0);
len1 = curve1.push(p1);
} else if (len0 && len1) {
if (!span) {
drawArea(ctx, curve0, curve1, len0, len1);
len0 = len1 = 0;
curve0 = [];
curve1 = [];
} else {
if (d0) {
curve0.push(p0);
}
if (d1) {
curve1.push(p1);
}
}
}
}
drawArea(ctx, curve0, curve1, len0, len1);
ctx.closePath();
ctx.fillStyle = color;
ctx.fill();
}
var plugin_filler = {
id: 'filler',
afterDatasetsUpdate: function(chart, options) {
var count = (chart.data.datasets || []).length;
var propagate = options.propagate;
var sources = [];
var meta, i, el, source;
for (i = 0; i < count; ++i) {
meta = chart.getDatasetMeta(i);
el = meta.dataset;
source = null;
if (el && el._model && el instanceof elements.Line) {
source = {
visible: chart.isDatasetVisible(i),
fill: decodeFill(el, i, count),
chart: chart,
el: el
};
}
meta.$filler = source;
sources.push(source);
}
for (i = 0; i < count; ++i) {
source = sources[i];
if (!source) {
continue;
}
source.fill = resolveTarget(sources, i, propagate);
source.boundary = computeBoundary(source);
source.mapper = createMapper(source);
}
},
beforeDatasetDraw: function(chart, args) {
var meta = args.meta.$filler;
if (!meta) {
return;
}
var ctx = chart.ctx;
var el = meta.el;
var view = el._view;
var points = el._children || [];
var mapper = meta.mapper;
var color = view.backgroundColor || core_defaults.global.defaultColor;
if (mapper && color && points.length) {
helpers$1.canvas.clipArea(ctx, chart.chartArea);
doFill(ctx, points, mapper, view, color, el._loop);
helpers$1.canvas.unclipArea(ctx);
}
}
};
var noop$1 = helpers$1.noop;
var valueOrDefault$d = helpers$1.valueOrDefault;
core_defaults._set('global', {
legend: {
display: true,
position: 'top',
fullWidth: true,
reverse: false,
weight: 1000,
// a callback that will handle
onClick: function(e, legendItem) {
var index = legendItem.datasetIndex;
var ci = this.chart;
var meta = ci.getDatasetMeta(index);
// See controller.isDatasetVisible comment
meta.hidden = meta.hidden === null ? !ci.data.datasets[index].hidden : null;
// We hid a dataset ... rerender the chart
ci.update();
},
onHover: null,
onLeave: null,
labels: {
boxWidth: 40,
padding: 10,
// Generates labels shown in the legend
// Valid properties to return:
// text : text to display
// fillStyle : fill of coloured box
// strokeStyle: stroke of coloured box
// hidden : if this legend item refers to a hidden item
// lineCap : cap style for line
// lineDash
// lineDashOffset :
// lineJoin :
// lineWidth :
generateLabels: function(chart) {
var data = chart.data;
return helpers$1.isArray(data.datasets) ? data.datasets.map(function(dataset, i) {
return {
text: dataset.label,
fillStyle: (!helpers$1.isArray(dataset.backgroundColor) ? dataset.backgroundColor : dataset.backgroundColor[0]),
hidden: !chart.isDatasetVisible(i),
lineCap: dataset.borderCapStyle,
lineDash: dataset.borderDash,
lineDashOffset: dataset.borderDashOffset,
lineJoin: dataset.borderJoinStyle,
lineWidth: dataset.borderWidth,
strokeStyle: dataset.borderColor,
pointStyle: dataset.pointStyle,
// Below is extra data used for toggling the datasets
datasetIndex: i
};
}, this) : [];
}
}
},
legendCallback: function(chart) {
var text = [];
text.push('<ul class="' + chart.id + '-legend">');
for (var i = 0; i < chart.data.datasets.length; i++) {
text.push('<li><span style="background-color:' + chart.data.datasets[i].backgroundColor + '"></span>');
if (chart.data.datasets[i].label) {
text.push(chart.data.datasets[i].label);
}
text.push('</li>');
}
text.push('</ul>');
return text.join('');
}
});
/**
* Helper function to get the box width based on the usePointStyle option
* @param {object} labelopts - the label options on the legend
* @param {number} fontSize - the label font size
* @return {number} width of the color box area
*/
function getBoxWidth(labelOpts, fontSize) {
return labelOpts.usePointStyle && labelOpts.boxWidth > fontSize ?
fontSize :
labelOpts.boxWidth;
}
/**
* IMPORTANT: this class is exposed publicly as Chart.Legend, backward compatibility required!
*/
var Legend = core_element.extend({
initialize: function(config) {
helpers$1.extend(this, config);
// Contains hit boxes for each dataset (in dataset order)
this.legendHitBoxes = [];
/**
* @private
*/
this._hoveredItem = null;
// Are we in doughnut mode which has a different data type
this.doughnutMode = false;
},
// These methods are ordered by lifecycle. Utilities then follow.
// Any function defined here is inherited by all legend types.
// Any function can be extended by the legend type
beforeUpdate: noop$1,
update: function(maxWidth, maxHeight, margins) {
var me = this;
// 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 = margins;
// Dimensions
me.beforeSetDimensions();
me.setDimensions();
me.afterSetDimensions();
// Labels
me.beforeBuildLabels();
me.buildLabels();
me.afterBuildLabels();
// Fit
me.beforeFit();
me.fit();
me.afterFit();
//
me.afterUpdate();
return me.minSize;
},
afterUpdate: noop$1,
//
beforeSetDimensions: noop$1,
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;
// Reset minSize
me.minSize = {
width: 0,
height: 0
};
},
afterSetDimensions: noop$1,
//
beforeBuildLabels: noop$1,
buildLabels: function() {
var me = this;
var labelOpts = me.options.labels || {};
var legendItems = helpers$1.callback(labelOpts.generateLabels, [me.chart], me) || [];
if (labelOpts.filter) {
legendItems = legendItems.filter(function(item) {
return labelOpts.filter(item, me.chart.data);
});
}
if (me.options.reverse) {
legendItems.reverse();
}
me.legendItems = legendItems;
},
afterBuildLabels: noop$1,
//
beforeFit: noop$1,
fit: function() {
var me = this;
var opts = me.options;
var labelOpts = opts.labels;
var display = opts.display;
var ctx = me.ctx;
var labelFont = helpers$1.options._parseFont(labelOpts);
var fontSize = labelFont.size;
// Reset hit boxes
var hitboxes = me.legendHitBoxes = [];
var minSize = me.minSize;
var isHorizontal = me.isHorizontal();
if (isHorizontal) {
minSize.width = me.maxWidth; // fill all the width
minSize.height = display ? 10 : 0;
} else {
minSize.width = display ? 10 : 0;
minSize.height = me.maxHeight; // fill all the height
}
// Increase sizes here
if (display) {
ctx.font = labelFont.string;
if (isHorizontal) {
// Labels
// Width of each line of legend boxes. Labels wrap onto multiple lines when there are too many to fit on one
var lineWidths = me.lineWidths = [0];
var totalHeight = 0;
ctx.textAlign = 'left';
ctx.textBaseline = 'top';
helpers$1.each(me.legendItems, function(legendItem, i) {
var boxWidth = getBoxWidth(labelOpts, fontSize);
var width = boxWidth + (fontSize / 2) + ctx.measureText(legendItem.text).width;
if (i === 0 || lineWidths[lineWidths.length - 1] + width + labelOpts.padding > minSize.width) {
totalHeight += fontSize + labelOpts.padding;
lineWidths[lineWidths.length - (i > 0 ? 0 : 1)] = labelOpts.padding;
}
// Store the hitbox width and height here. Final position will be updated in `draw`
hitboxes[i] = {
left: 0,
top: 0,
width: width,
height: fontSize
};
lineWidths[lineWidths.length - 1] += width + labelOpts.padding;
});
minSize.height += totalHeight;
} else {
var vPadding = labelOpts.padding;
var columnWidths = me.columnWidths = [];
var totalWidth = labelOpts.padding;
var currentColWidth = 0;
var currentColHeight = 0;
var itemHeight = fontSize + vPadding;
helpers$1.each(me.legendItems, function(legendItem, i) {
var boxWidth = getBoxWidth(labelOpts, fontSize);
var itemWidth = boxWidth + (fontSize / 2) + ctx.measureText(legendItem.text).width;
// If too tall, go to new column
if (i > 0 && currentColHeight + itemHeight > minSize.height - vPadding) {
totalWidth += currentColWidth + labelOpts.padding;
columnWidths.push(currentColWidth); // previous column width
currentColWidth = 0;
currentColHeight = 0;
}
// Get max width
currentColWidth = Math.max(currentColWidth, itemWidth);
currentColHeight += itemHeight;
// Store the hitbox width and height here. Final position will be updated in `draw`
hitboxes[i] = {
left: 0,
top: 0,
width: itemWidth,
height: fontSize
};
});
totalWidth += currentColWidth;
columnWidths.push(currentColWidth);
minSize.width += totalWidth;
}
}
me.width = minSize.width;
me.height = minSize.height;
},
afterFit: noop$1,
// Shared Methods
isHorizontal: function() {
return this.options.position === 'top' || this.options.position === 'bottom';
},
// Actually draw the legend on the canvas
draw: function() {
var me = this;
var opts = me.options;
var labelOpts = opts.labels;
var globalDefaults = core_defaults.global;
var defaultColor = globalDefaults.defaultColor;
var lineDefault = globalDefaults.elements.line;
var legendWidth = me.width;
var lineWidths = me.lineWidths;
if (opts.display) {
var ctx = me.ctx;
var fontColor = valueOrDefault$d(labelOpts.fontColor, globalDefaults.defaultFontColor);
var labelFont = helpers$1.options._parseFont(labelOpts);
var fontSize = labelFont.size;
var cursor;
// Canvas setup
ctx.textAlign = 'left';
ctx.textBaseline = 'middle';
ctx.lineWidth = 0.5;
ctx.strokeStyle = fontColor; // for strikethrough effect
ctx.fillStyle = fontColor; // render in correct colour
ctx.font = labelFont.string;
var boxWidth = getBoxWidth(labelOpts, fontSize);
var hitboxes = me.legendHitBoxes;
// current position
var drawLegendBox = function(x, y, legendItem) {
if (isNaN(boxWidth) || boxWidth <= 0) {
return;
}
// Set the ctx for the box
ctx.save();
var lineWidth = valueOrDefault$d(legendItem.lineWidth, lineDefault.borderWidth);
ctx.fillStyle = valueOrDefault$d(legendItem.fillStyle, defaultColor);
ctx.lineCap = valueOrDefault$d(legendItem.lineCap, lineDefault.borderCapStyle);
ctx.lineDashOffset = valueOrDefault$d(legendItem.lineDashOffset, lineDefault.borderDashOffset);
ctx.lineJoin = valueOrDefault$d(legendItem.lineJoin, lineDefault.borderJoinStyle);
ctx.lineWidth = lineWidth;
ctx.strokeStyle = valueOrDefault$d(legendItem.strokeStyle, defaultColor);
if (ctx.setLineDash) {
// IE 9 and 10 do not support line dash
ctx.setLineDash(valueOrDefault$d(legendItem.lineDash, lineDefault.borderDash));
}
if (opts.labels && opts.labels.usePointStyle) {
// Recalculate x and y for drawPoint() because its expecting
// x and y to be center of figure (instead of top left)
var radius = boxWidth * Math.SQRT2 / 2;
var centerX = x + boxWidth / 2;
var centerY = y + fontSize / 2;
// Draw pointStyle as legend symbol
helpers$1.canvas.drawPoint(ctx, legendItem.pointStyle, radius, centerX, centerY);
} else {
// Draw box as legend symbol
if (lineWidth !== 0) {
ctx.strokeRect(x, y, boxWidth, fontSize);
}
ctx.fillRect(x, y, boxWidth, fontSize);
}
ctx.restore();
};
var fillText = function(x, y, legendItem, textWidth) {
var halfFontSize = fontSize / 2;
var xLeft = boxWidth + halfFontSize + x;
var yMiddle = y + halfFontSize;
ctx.fillText(legendItem.text, xLeft, yMiddle);
if (legendItem.hidden) {
// Strikethrough the text if hidden
ctx.beginPath();
ctx.lineWidth = 2;
ctx.moveTo(xLeft, yMiddle);
ctx.lineTo(xLeft + textWidth, yMiddle);
ctx.stroke();
}
};
// Horizontal
var isHorizontal = me.isHorizontal();
if (isHorizontal) {
cursor = {
x: me.left + ((legendWidth - lineWidths[0]) / 2) + labelOpts.padding,
y: me.top + labelOpts.padding,
line: 0
};
} else {
cursor = {
x: me.left + labelOpts.padding,
y: me.top + labelOpts.padding,
line: 0
};
}
var itemHeight = fontSize + labelOpts.padding;
helpers$1.each(me.legendItems, function(legendItem, i) {
var textWidth = ctx.measureText(legendItem.text).width;
var width = boxWidth + (fontSize / 2) + textWidth;
var x = cursor.x;
var y = cursor.y;
// Use (me.left + me.minSize.width) and (me.top + me.minSize.height)
// instead of me.right and me.bottom because me.width and me.height
// may have been changed since me.minSize was calculated
if (isHorizontal) {
if (i > 0 && x + width + labelOpts.padding > me.left + me.minSize.width) {
y = cursor.y += itemHeight;
cursor.line++;
x = cursor.x = me.left + ((legendWidth - lineWidths[cursor.line]) / 2) + labelOpts.padding;
}
} else if (i > 0 && y + itemHeight > me.top + me.minSize.height) {
x = cursor.x = x + me.columnWidths[cursor.line] + labelOpts.padding;
y = cursor.y = me.top + labelOpts.padding;
cursor.line++;
}
drawLegendBox(x, y, legendItem);
hitboxes[i].left = x;
hitboxes[i].top = y;
// Fill the actual label
fillText(x, y, legendItem, textWidth);
if (isHorizontal) {
cursor.x += width + labelOpts.padding;
} else {
cursor.y += itemHeight;
}
});
}
},
/**
* @private
*/
_getLegendItemAt: function(x, y) {
var me = this;
var i, hitBox, lh;
if (x >= me.left && x <= me.right && y >= me.top && y <= me.bottom) {
// See if we are touching one of the dataset boxes
lh = me.legendHitBoxes;
for (i = 0; i < lh.length; ++i) {
hitBox = lh[i];
if (x >= hitBox.left && x <= hitBox.left + hitBox.width && y >= hitBox.top && y <= hitBox.top + hitBox.height) {
// Touching an element
return me.legendItems[i];
}
}
}
return null;
},
/**
* Handle an event
* @private
* @param {IEvent} event - The event to handle
*/
handleEvent: function(e) {
var me = this;
var opts = me.options;
var type = e.type === 'mouseup' ? 'click' : e.type;
var hoveredItem;
if (type === 'mousemove') {
if (!opts.onHover && !opts.onLeave) {
return;
}
} else if (type === 'click') {
if (!opts.onClick) {
return;
}
} else {
return;
}
// Chart event already has relative position in it
hoveredItem = me._getLegendItemAt(e.x, e.y);
if (type === 'click') {
if (hoveredItem && opts.onClick) {
// use e.native for backwards compatibility
opts.onClick.call(me, e.native, hoveredItem);
}
} else {
if (opts.onLeave && hoveredItem !== me._hoveredItem) {
if (me._hoveredItem) {
opts.onLeave.call(me, e.native, me._hoveredItem);
}
me._hoveredItem = hoveredItem;
}
if (opts.onHover && hoveredItem) {
// use e.native for backwards compatibility
opts.onHover.call(me, e.native, hoveredItem);
}
}
}
});
function createNewLegendAndAttach(chart, legendOpts) {
var legend = new Legend({
ctx: chart.ctx,
options: legendOpts,
chart: chart
});
core_layouts.configure(chart, legend, legendOpts);
core_layouts.addBox(chart, legend);
chart.legend = legend;
}
var plugin_legend = {
id: 'legend',
/**
* Backward compatibility: since 2.1.5, the legend is registered as a plugin, making
* Chart.Legend obsolete. To avoid a breaking change, we export the Legend as part of
* the plugin, which one will be re-exposed in the chart.js file.
* https://github.com/chartjs/Chart.js/pull/2640
* @private
*/
_element: Legend,
beforeInit: function(chart) {
var legendOpts = chart.options.legend;
if (legendOpts) {
createNewLegendAndAttach(chart, legendOpts);
}
},
beforeUpdate: function(chart) {
var legendOpts = chart.options.legend;
var legend = chart.legend;
if (legendOpts) {
helpers$1.mergeIf(legendOpts, core_defaults.global.legend);
if (legend) {
core_layouts.configure(chart, legend, legendOpts);
legend.options = legendOpts;
} else {
createNewLegendAndAttach(chart, legendOpts);
}
} else if (legend) {
core_layouts.removeBox(chart, legend);
delete chart.legend;
}
},
afterEvent: function(chart, e) {
var legend = chart.legend;
if (legend) {
legend.handleEvent(e);
}
}
};
var noop$2 = helpers$1.noop;
core_defaults._set('global', {
title: {
display: false,
fontStyle: 'bold',
fullWidth: true,
padding: 10,
position: 'top',
text: '',
weight: 2000 // by default greater than legend (1000) to be above
}
});
/**
* IMPORTANT: this class is exposed publicly as Chart.Legend, backward compatibility required!
*/
var Title = core_element.extend({
initialize: function(config) {
var me = this;
helpers$1.extend(me, config);
// Contains hit boxes for each dataset (in dataset order)
me.legendHitBoxes = [];
},
// These methods are ordered by lifecycle. Utilities then follow.
beforeUpdate: noop$2,
update: function(maxWidth, maxHeight, margins) {
var me = this;
// 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 = margins;
// Dimensions
me.beforeSetDimensions();
me.setDimensions();
me.afterSetDimensions();
// Labels
me.beforeBuildLabels();
me.buildLabels();
me.afterBuildLabels();
// Fit
me.beforeFit();
me.fit();
me.afterFit();
//
me.afterUpdate();
return me.minSize;
},
afterUpdate: noop$2,
//
beforeSetDimensions: noop$2,
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;
// Reset minSize
me.minSize = {
width: 0,
height: 0
};
},
afterSetDimensions: noop$2,
//
beforeBuildLabels: noop$2,
buildLabels: noop$2,
afterBuildLabels: noop$2,
//
beforeFit: noop$2,
fit: function() {
var me = this;
var opts = me.options;
var display = opts.display;
var minSize = me.minSize;
var lineCount = helpers$1.isArray(opts.text) ? opts.text.length : 1;
var fontOpts = helpers$1.options._parseFont(opts);
var textSize = display ? (lineCount * fontOpts.lineHeight) + (opts.padding * 2) : 0;
if (me.isHorizontal()) {
minSize.width = me.maxWidth; // fill all the width
minSize.height = textSize;
} else {
minSize.width = textSize;
minSize.height = me.maxHeight; // fill all the height
}
me.width = minSize.width;
me.height = minSize.height;
},
afterFit: noop$2,
// Shared Methods
isHorizontal: function() {
var pos = this.options.position;
return pos === 'top' || pos === 'bottom';
},
// Actually draw the title block on the canvas
draw: function() {
var me = this;
var ctx = me.ctx;
var opts = me.options;
if (opts.display) {
var fontOpts = helpers$1.options._parseFont(opts);
var lineHeight = fontOpts.lineHeight;
var offset = lineHeight / 2 + opts.padding;
var rotation = 0;
var top = me.top;
var left = me.left;
var bottom = me.bottom;
var right = me.right;
var maxWidth, titleX, titleY;
ctx.fillStyle = helpers$1.valueOrDefault(opts.fontColor, core_defaults.global.defaultFontColor); // render in correct colour
ctx.font = fontOpts.string;
// Horizontal
if (me.isHorizontal()) {
titleX = left + ((right - left) / 2); // midpoint of the width
titleY = top + offset;
maxWidth = right - left;
} else {
titleX = opts.position === 'left' ? left + offset : right - offset;
titleY = top + ((bottom - top) / 2);
maxWidth = bottom - top;
rotation = Math.PI * (opts.position === 'left' ? -0.5 : 0.5);
}
ctx.save();
ctx.translate(titleX, titleY);
ctx.rotate(rotation);
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
var text = opts.text;
if (helpers$1.isArray(text)) {
var y = 0;
for (var i = 0; i < text.length; ++i) {
ctx.fillText(text[i], 0, y, maxWidth);
y += lineHeight;
}
} else {
ctx.fillText(text, 0, 0, maxWidth);
}
ctx.restore();
}
}
});
function createNewTitleBlockAndAttach(chart, titleOpts) {
var title = new Title({
ctx: chart.ctx,
options: titleOpts,
chart: chart
});
core_layouts.configure(chart, title, titleOpts);
core_layouts.addBox(chart, title);
chart.titleBlock = title;
}
var plugin_title = {
id: 'title',
/**
* Backward compatibility: since 2.1.5, the title is registered as a plugin, making
* Chart.Title obsolete. To avoid a breaking change, we export the Title as part of
* the plugin, which one will be re-exposed in the chart.js file.
* https://github.com/chartjs/Chart.js/pull/2640
* @private
*/
_element: Title,
beforeInit: function(chart) {
var titleOpts = chart.options.title;
if (titleOpts) {
createNewTitleBlockAndAttach(chart, titleOpts);
}
},
beforeUpdate: function(chart) {
var titleOpts = chart.options.title;
var titleBlock = chart.titleBlock;
if (titleOpts) {
helpers$1.mergeIf(titleOpts, core_defaults.global.title);
if (titleBlock) {
core_layouts.configure(chart, titleBlock, titleOpts);
titleBlock.options = titleOpts;
} else {
createNewTitleBlockAndAttach(chart, titleOpts);
}
} else if (titleBlock) {
core_layouts.removeBox(chart, titleBlock);
delete chart.titleBlock;
}
}
};
var plugins = {};
var filler = plugin_filler;
var legend = plugin_legend;
var title = plugin_title;
plugins.filler = filler;
plugins.legend = legend;
plugins.title = title;
/**
* @namespace Chart
*/
core_controller.helpers = helpers$1;
// @todo dispatch these helpers into appropriated helpers/helpers.* file and write unit tests!
core_helpers(core_controller);
core_controller._adapters = core_adapters;
core_controller.Animation = core_animation;
core_controller.animationService = core_animations;
core_controller.controllers = controllers;
core_controller.DatasetController = core_datasetController;
core_controller.defaults = core_defaults;
core_controller.Element = core_element;
core_controller.elements = elements;
core_controller.Interaction = core_interaction;
core_controller.layouts = core_layouts;
core_controller.platform = platform;
core_controller.plugins = core_plugins;
core_controller.Scale = core_scale;
core_controller.scaleService = core_scaleService;
core_controller.Ticks = core_ticks;
core_controller.Tooltip = core_tooltip;
// Register built-in scales
core_controller.helpers.each(scales, function(scale, type) {
core_controller.scaleService.registerScaleType(type, scale, scale._defaults);
});
// Load to register built-in adapters (as side effects)
// Loading built-in plugins
for (var k in plugins) {
if (plugins.hasOwnProperty(k)) {
core_controller.plugins.register(plugins[k]);
}
}
core_controller.platform.initialize();
var src = core_controller;
if (typeof window !== 'undefined') {
window.Chart = core_controller;
}
// DEPRECATIONS
/**
* Provided for backward compatibility, not available anymore
* @namespace Chart.Chart
* @deprecated since version 2.8.0
* @todo remove at version 3
* @private
*/
core_controller.Chart = core_controller;
/**
* Provided for backward compatibility, not available anymore
* @namespace Chart.Legend
* @deprecated since version 2.1.5
* @todo remove at version 3
* @private
*/
core_controller.Legend = plugins.legend._element;
/**
* Provided for backward compatibility, not available anymore
* @namespace Chart.Title
* @deprecated since version 2.1.5
* @todo remove at version 3
* @private
*/
core_controller.Title = plugins.title._element;
/**
* Provided for backward compatibility, use Chart.plugins instead
* @namespace Chart.pluginService
* @deprecated since version 2.1.5
* @todo remove at version 3
* @private
*/
core_controller.pluginService = core_controller.plugins;
/**
* Provided for backward compatibility, inheriting from Chart.PlugingBase has no
* effect, instead simply create/register plugins via plain JavaScript objects.
* @interface Chart.PluginBase
* @deprecated since version 2.5.0
* @todo remove at version 3
* @private
*/
core_controller.PluginBase = core_controller.Element.extend({});
/**
* Provided for backward compatibility, use Chart.helpers.canvas instead.
* @namespace Chart.canvasHelpers
* @deprecated since version 2.6.0
* @todo remove at version 3
* @private
*/
core_controller.canvasHelpers = core_controller.helpers.canvas;
/**
* Provided for backward compatibility, use Chart.layouts instead.
* @namespace Chart.layoutService
* @deprecated since version 2.7.3
* @todo remove at version 3
* @private
*/
core_controller.layoutService = core_controller.layouts;
/**
* Provided for backward compatibility, not available anymore.
* @namespace Chart.LinearScaleBase
* @deprecated since version 2.8
* @todo remove at version 3
* @private
*/
core_controller.LinearScaleBase = scale_linearbase;
/**
* Provided for backward compatibility, instead we should create a new Chart
* by setting the type in the config (`new Chart(id, {type: '{chart-type}'}`).
* @deprecated since version 2.8.0
* @todo remove at version 3
*/
core_controller.helpers.each(
[
'Bar',
'Bubble',
'Doughnut',
'Line',
'PolarArea',
'Radar',
'Scatter'
],
function(klass) {
core_controller[klass] = function(ctx, cfg) {
return new core_controller(ctx, core_controller.helpers.merge(cfg || {}, {
type: klass.charAt(0).toLowerCase() + klass.slice(1)
}));
};
}
);
return src;
})));