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Add Color class from tagcloud hexo helper
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'use strict'; | ||
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// https://github.com/imathis/hsl-picker/blob/master/assets/javascripts/modules/color.coffee | ||
const rHex3 = /^#[0-9a-f]{3}$/; | ||
const rHex6 = /^#[0-9a-f]{6}$/; | ||
const rRGB = /^rgba?\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,?\s*(0?\.?\d+)?\s*\)$/; | ||
const rHSL = /^hsla?\(\s*(\d{1,3})\s*,\s*(\d{1,3})%\s*,\s*(\d{1,3})%\s*,?\s*(0?\.?\d+)?\s*\)$/; | ||
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// https://www.w3.org/TR/css3-color/#svg-color | ||
const colorNames = { | ||
aliceblue: {r: 240, g: 248, b: 255, a: 1}, | ||
antiquewhite: {r: 250, g: 235, b: 215, a: 1}, | ||
aqua: {r: 0, g: 255, b: 255, a: 1}, | ||
aquamarine: {r: 127, g: 255, b: 212, a: 1}, | ||
azure: {r: 240, g: 255, b: 255, a: 1}, | ||
beige: {r: 245, g: 245, b: 220, a: 1}, | ||
bisque: {r: 255, g: 228, b: 196, a: 1}, | ||
black: {r: 0, g: 0, b: 0, a: 1}, | ||
blanchedalmond: {r: 255, g: 235, b: 205, a: 1}, | ||
blue: {r: 0, g: 0, b: 255, a: 1}, | ||
blueviolet: {r: 138, g: 43, b: 226, a: 1}, | ||
brown: {r: 165, g: 42, b: 42, a: 1}, | ||
burlywood: {r: 222, g: 184, b: 135, a: 1}, | ||
cadetblue: {r: 95, g: 158, b: 160, a: 1}, | ||
chartreuse: {r: 127, g: 255, b: 0, a: 1}, | ||
chocolate: {r: 210, g: 105, b: 30, a: 1}, | ||
coral: {r: 255, g: 127, b: 80, a: 1}, | ||
cornflowerblue: {r: 100, g: 149, b: 237, a: 1}, | ||
cornsilk: {r: 255, g: 248, b: 220, a: 1}, | ||
crimson: {r: 220, g: 20, b: 60, a: 1}, | ||
cyan: {r: 0, g: 255, b: 255, a: 1}, | ||
darkblue: {r: 0, g: 0, b: 139, a: 1}, | ||
darkcyan: {r: 0, g: 139, b: 139, a: 1}, | ||
darkgoldenrod: {r: 184, g: 134, b: 11, a: 1}, | ||
darkgray: {r: 169, g: 169, b: 169, a: 1}, | ||
darkgreen: {r: 0, g: 100, b: 0, a: 1}, | ||
darkgrey: {r: 169, g: 169, b: 169, a: 1}, | ||
darkkhaki: {r: 189, g: 183, b: 107, a: 1}, | ||
darkmagenta: {r: 139, g: 0, b: 139, a: 1}, | ||
darkolivegreen: {r: 85, g: 107, b: 47, a: 1}, | ||
darkorange: {r: 255, g: 140, b: 0, a: 1}, | ||
darkorchid: {r: 153, g: 50, b: 204, a: 1}, | ||
darkred: {r: 139, g: 0, b: 0, a: 1}, | ||
darksalmon: {r: 233, g: 150, b: 122, a: 1}, | ||
darkseagreen: {r: 143, g: 188, b: 143, a: 1}, | ||
darkslateblue: {r: 72, g: 61, b: 139, a: 1}, | ||
darkslategray: {r: 47, g: 79, b: 79, a: 1}, | ||
darkslategrey: {r: 47, g: 79, b: 79, a: 1}, | ||
darkturquoise: {r: 0, g: 206, b: 209, a: 1}, | ||
darkviolet: {r: 148, g: 0, b: 211, a: 1}, | ||
deeppink: {r: 255, g: 20, b: 147, a: 1}, | ||
deepskyblue: {r: 0, g: 191, b: 255, a: 1}, | ||
dimgray: {r: 105, g: 105, b: 105, a: 1}, | ||
dimgrey: {r: 105, g: 105, b: 105, a: 1}, | ||
dodgerblue: {r: 30, g: 144, b: 255, a: 1}, | ||
firebrick: {r: 178, g: 34, b: 34, a: 1}, | ||
floralwhite: {r: 255, g: 250, b: 240, a: 1}, | ||
forestgreen: {r: 34, g: 139, b: 34, a: 1}, | ||
fuchsia: {r: 255, g: 0, b: 255, a: 1}, | ||
gainsboro: {r: 220, g: 220, b: 220, a: 1}, | ||
ghostwhite: {r: 248, g: 248, b: 255, a: 1}, | ||
gold: {r: 255, g: 215, b: 0, a: 1}, | ||
goldenrod: {r: 218, g: 165, b: 32, a: 1}, | ||
gray: {r: 128, g: 128, b: 128, a: 1}, | ||
green: {r: 0, g: 128, b: 0, a: 1}, | ||
greenyellow: {r: 173, g: 255, b: 47, a: 1}, | ||
grey: {r: 128, g: 128, b: 128, a: 1}, | ||
honeydew: {r: 240, g: 255, b: 240, a: 1}, | ||
hotpink: {r: 255, g: 105, b: 180, a: 1}, | ||
indianred: {r: 205, g: 92, b: 92, a: 1}, | ||
indigo: {r: 75, g: 0, b: 130, a: 1}, | ||
ivory: {r: 255, g: 255, b: 240, a: 1}, | ||
khaki: {r: 240, g: 230, b: 140, a: 1}, | ||
lavender: {r: 230, g: 230, b: 250, a: 1}, | ||
lavenderblush: {r: 255, g: 240, b: 245, a: 1}, | ||
lawngreen: {r: 124, g: 252, b: 0, a: 1}, | ||
lemonchiffon: {r: 255, g: 250, b: 205, a: 1}, | ||
lightblue: {r: 173, g: 216, b: 230, a: 1}, | ||
lightcoral: {r: 240, g: 128, b: 128, a: 1}, | ||
lightcyan: {r: 224, g: 255, b: 255, a: 1}, | ||
lightgoldenrodyellow: {r: 250, g: 250, b: 210, a: 1}, | ||
lightgray: {r: 211, g: 211, b: 211, a: 1}, | ||
lightgreen: {r: 144, g: 238, b: 144, a: 1}, | ||
lightgrey: {r: 211, g: 211, b: 211, a: 1}, | ||
lightpink: {r: 255, g: 182, b: 193, a: 1}, | ||
lightsalmon: {r: 255, g: 160, b: 122, a: 1}, | ||
lightseagreen: {r: 32, g: 178, b: 170, a: 1}, | ||
lightskyblue: {r: 135, g: 206, b: 250, a: 1}, | ||
lightslategray: {r: 119, g: 136, b: 153, a: 1}, | ||
lightslategrey: {r: 119, g: 136, b: 153, a: 1}, | ||
lightsteelblue: {r: 176, g: 196, b: 222, a: 1}, | ||
lightyellow: {r: 255, g: 255, b: 224, a: 1}, | ||
lime: {r: 0, g: 255, b: 0, a: 1}, | ||
limegreen: {r: 50, g: 205, b: 50, a: 1}, | ||
linen: {r: 250, g: 240, b: 230, a: 1}, | ||
magenta: {r: 255, g: 0, b: 255, a: 1}, | ||
maroon: {r: 128, g: 0, b: 0, a: 1}, | ||
mediumaquamarine: {r: 102, g: 205, b: 170, a: 1}, | ||
mediumblue: {r: 0, g: 0, b: 205, a: 1}, | ||
mediumorchid: {r: 186, g: 85, b: 211, a: 1}, | ||
mediumpurple: {r: 147, g: 112, b: 219, a: 1}, | ||
mediumseagreen: {r: 60, g: 179, b: 113, a: 1}, | ||
mediumslateblue: {r: 123, g: 104, b: 238, a: 1}, | ||
mediumspringgreen: {r: 0, g: 250, b: 154, a: 1}, | ||
mediumturquoise: {r: 72, g: 209, b: 204, a: 1}, | ||
mediumvioletred: {r: 199, g: 21, b: 133, a: 1}, | ||
midnightblue: {r: 25, g: 25, b: 112, a: 1}, | ||
mintcream: {r: 245, g: 255, b: 250, a: 1}, | ||
mistyrose: {r: 255, g: 228, b: 225, a: 1}, | ||
moccasin: {r: 255, g: 228, b: 181, a: 1}, | ||
navajowhite: {r: 255, g: 222, b: 173, a: 1}, | ||
navy: {r: 0, g: 0, b: 128, a: 1}, | ||
oldlace: {r: 253, g: 245, b: 230, a: 1}, | ||
olive: {r: 128, g: 128, b: 0, a: 1}, | ||
olivedrab: {r: 107, g: 142, b: 35, a: 1}, | ||
orange: {r: 255, g: 165, b: 0, a: 1}, | ||
orangered: {r: 255, g: 69, b: 0, a: 1}, | ||
orchid: {r: 218, g: 112, b: 214, a: 1}, | ||
palegoldenrod: {r: 238, g: 232, b: 170, a: 1}, | ||
palegreen: {r: 152, g: 251, b: 152, a: 1}, | ||
paleturquoise: {r: 175, g: 238, b: 238, a: 1}, | ||
palevioletred: {r: 219, g: 112, b: 147, a: 1}, | ||
papayawhip: {r: 255, g: 239, b: 213, a: 1}, | ||
peachpuff: {r: 255, g: 218, b: 185, a: 1}, | ||
peru: {r: 205, g: 133, b: 63, a: 1}, | ||
pink: {r: 255, g: 192, b: 203, a: 1}, | ||
plum: {r: 221, g: 160, b: 221, a: 1}, | ||
powderblue: {r: 176, g: 224, b: 230, a: 1}, | ||
purple: {r: 128, g: 0, b: 128, a: 1}, | ||
red: {r: 255, g: 0, b: 0, a: 1}, | ||
rosybrown: {r: 188, g: 143, b: 143, a: 1}, | ||
royalblue: {r: 65, g: 105, b: 225, a: 1}, | ||
saddlebrown: {r: 139, g: 69, b: 19, a: 1}, | ||
salmon: {r: 250, g: 128, b: 114, a: 1}, | ||
sandybrown: {r: 244, g: 164, b: 96, a: 1}, | ||
seagreen: {r: 46, g: 139, b: 87, a: 1}, | ||
seashell: {r: 255, g: 245, b: 238, a: 1}, | ||
sienna: {r: 160, g: 82, b: 45, a: 1}, | ||
silver: {r: 192, g: 192, b: 192, a: 1}, | ||
skyblue: {r: 135, g: 206, b: 235, a: 1}, | ||
slateblue: {r: 106, g: 90, b: 205, a: 1}, | ||
slategray: {r: 112, g: 128, b: 144, a: 1}, | ||
slategrey: {r: 112, g: 128, b: 144, a: 1}, | ||
snow: {r: 255, g: 250, b: 250, a: 1}, | ||
springgreen: {r: 0, g: 255, b: 127, a: 1}, | ||
steelblue: {r: 70, g: 130, b: 180, a: 1}, | ||
tan: {r: 210, g: 180, b: 140, a: 1}, | ||
teal: {r: 0, g: 128, b: 128, a: 1}, | ||
thistle: {r: 216, g: 191, b: 216, a: 1}, | ||
tomato: {r: 255, g: 99, b: 71, a: 1}, | ||
turquoise: {r: 64, g: 224, b: 208, a: 1}, | ||
violet: {r: 238, g: 130, b: 238, a: 1}, | ||
wheat: {r: 245, g: 222, b: 179, a: 1}, | ||
white: {r: 255, g: 255, b: 255, a: 1}, | ||
whitesmoke: {r: 245, g: 245, b: 245, a: 1}, | ||
yellow: {r: 255, g: 255, b: 0, a: 1}, | ||
yellowgreen: {r: 154, g: 205, b: 50, a: 1} | ||
}; | ||
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const convertHue = (p, q, h) => { | ||
if (h < 0) h++; | ||
if (h > 1) h--; | ||
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let color; | ||
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if (h * 6 < 1) { | ||
color = p + ((q - p) * h * 6); | ||
} else if (h * 2 < 1) { | ||
color = q; | ||
} else if (h * 3 < 2) { | ||
color = p + ((q - p) * ((2 / 3) - h) * 6); | ||
} else { | ||
color = p; | ||
} | ||
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return Math.round(color * 255); | ||
}; | ||
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const convertRGB = value => { | ||
const str = value.toString(16); | ||
if (value < 16) return `0${str}`; | ||
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return str; | ||
}; | ||
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const mixValue = (a, b, ratio) => a + ((b - a) * ratio); | ||
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class Color { | ||
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/** | ||
* @param {string|{ r: number; g: number; b: number; a: number;}} color | ||
*/ | ||
constructor(color) { | ||
if (typeof color === 'string') { | ||
this._parse(color); | ||
} else if (color != null && typeof color === 'object') { | ||
this.r = color.r | 0; | ||
this.g = color.g | 0; | ||
this.b = color.b | 0; | ||
this.a = +color.a; | ||
} else { | ||
throw new TypeError('color is required!'); | ||
} | ||
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if (this.r < 0 || this.r > 255 | ||
|| this.g < 0 || this.g > 255 | ||
|| this.b < 0 || this.b > 255 | ||
|| this.a < 0 || this.a > 1) { | ||
throw new RangeError(`{r: ${this.r}, g: ${this.g}, b: ${this.b}, a: ${this.a}} is invalid.`); | ||
} | ||
} | ||
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/** | ||
* @param {string} color | ||
*/ | ||
_parse(color) { | ||
color = color.toLowerCase(); | ||
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if (colorNames.hasOwnProperty(color)) { | ||
const obj = colorNames[color]; | ||
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this.r = obj.r; | ||
this.g = obj.g; | ||
this.b = obj.b; | ||
this.a = obj.a; | ||
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return; | ||
} | ||
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if (rHex3.test(color)) { | ||
const txt = color.substring(1); | ||
const code = parseInt(txt, 16); | ||
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this.r = ((code & 0xF00) >> 8) * 17; | ||
this.g = ((code & 0xF0) >> 4) * 17; | ||
this.b = (code & 0xF) * 17; | ||
this.a = 1; | ||
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return; | ||
} | ||
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if (rHex6.test(color)) { | ||
const txt = color.substring(1); | ||
const code = parseInt(txt, 16); | ||
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this.r = (code & 0xFF0000) >> 16; | ||
this.g = (code & 0xFF00) >> 8; | ||
this.b = code & 0xFF; | ||
this.a = 1; | ||
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return; | ||
} | ||
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let match = color.match(rRGB); | ||
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if (match) { | ||
this.r = match[1] | 0; | ||
this.g = match[2] | 0; | ||
this.b = match[3] | 0; | ||
this.a = match[4] ? +match[4] : 1; | ||
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return; | ||
} | ||
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match = color.match(rHSL); | ||
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if (match) { | ||
const h = +match[1] / 360; | ||
const s = +match[2] / 100; | ||
const l = +match[3] / 100; | ||
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this.a = match[4] ? +match[4] : 1; | ||
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if (!s) { | ||
this.r = this.g = this.b = l * 255; | ||
} | ||
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const q = l < 0.5 ? l * (1 + s) : l + s - (l * s); | ||
const p = (2 * l) - q; | ||
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const rt = h + (1 / 3); | ||
const gt = h; | ||
const bt = h - (1 / 3); | ||
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this.r = convertHue(p, q, rt); | ||
this.g = convertHue(p, q, gt); | ||
this.b = convertHue(p, q, bt); | ||
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return; | ||
} | ||
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throw new Error(`${color} is not a supported color format.`); | ||
} | ||
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toString() { | ||
if (this.a === 1) { | ||
const r = convertRGB(this.r); | ||
const g = convertRGB(this.g); | ||
const b = convertRGB(this.b); | ||
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if (this.r % 17 || this.g % 17 || this.b % 17) { | ||
return `#${r}${g}${b}`; | ||
} | ||
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return `#${r[0]}${g[0]}${b[0]}`; | ||
} | ||
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return `rgba(${this.r}, ${this.g}, ${this.b}, ${parseFloat(this.a.toFixed(2))})`; | ||
} | ||
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/** | ||
* @param {string|{ r: number; g: number; b: number; a: number;}} color | ||
* @param {number} ratio | ||
*/ | ||
mix(color, ratio) { | ||
if (ratio > 1 || ratio < 0) { | ||
throw new RangeError('Valid numbers is only between 0 and 1.'); | ||
} | ||
switch (ratio) { | ||
case 0: | ||
return new Color(this); | ||
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case 1: | ||
return new Color(color); | ||
} | ||
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return new Color({ | ||
r: Math.round(mixValue(this.r, color.r, ratio)), | ||
g: Math.round(mixValue(this.g, color.g, ratio)), | ||
b: Math.round(mixValue(this.b, color.b, ratio)), | ||
a: mixValue(this.a, color.a, ratio) | ||
}); | ||
} | ||
} | ||
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module.exports = Color; |
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'use strict'; | ||
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describe('color', () => { | ||
const Color = require('../../lib/color'); | ||
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it('name', () => { | ||
const red = new Color('red'); | ||
const pink = new Color('pink'); | ||
const mid1 = red.mix(pink, 1 / 3); | ||
const mid2 = red.mix(pink, 2 / 3); | ||
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`${red}`.should.eql('#f00'); | ||
`${pink}`.should.eql('#ffc0cb'); | ||
`${mid1}`.should.eql('#ff4044'); | ||
`${mid2}`.should.eql('#ff8087'); | ||
}); | ||
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it('hex', () => { | ||
const red = new Color('#f00'); | ||
const pink = new Color('#ffc0cb'); | ||
const mid1 = red.mix(pink, 1 / 3); | ||
const mid2 = red.mix(pink, 2 / 3); | ||
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`${red}`.should.eql('#f00'); | ||
`${pink}`.should.eql('#ffc0cb'); | ||
`${mid1}`.should.eql('#ff4044'); | ||
`${mid2}`.should.eql('#ff8087'); | ||
}); | ||
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it('RGBA', () => { | ||
const steelblueA = new Color('rgba(70, 130, 180, 0.3)'); | ||
const steelblue = new Color('rgb(70, 130, 180)'); | ||
const mid1 = steelblueA.mix(steelblue, 1 / 3); | ||
const mid2 = steelblueA.mix(steelblue, 2 / 3); | ||
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`${steelblueA}`.should.eql('rgba(70, 130, 180, 0.3)'); | ||
`${steelblue}`.should.eql('#4682b4'); | ||
`${mid1}`.should.eql('rgba(70, 130, 180, 0.53)'); | ||
`${mid2}`.should.eql('rgba(70, 130, 180, 0.77)'); | ||
}); | ||
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it('HSLA', () => { | ||
const steelblueA = new Color('hsla(207, 44%, 49%, 0.3)'); | ||
const steelblue = new Color('hsl(207, 44%, 49%)'); | ||
const mid1 = steelblueA.mix(steelblue, 1 / 3); | ||
const mid2 = steelblueA.mix(steelblue, 2 / 3); | ||
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`${steelblueA}`.should.eql('rgba(70, 130, 180, 0.3)'); | ||
`${steelblue}`.should.eql('#4682b4'); | ||
`${mid1}`.should.eql('rgba(70, 130, 180, 0.53)'); | ||
`${mid2}`.should.eql('rgba(70, 130, 180, 0.77)'); | ||
}); | ||
}); |