| 提交 | 用户 | 时间 | ||
| 820397 | 1 | /** |
| H | 2 | * 判断是否 十六进制颜色值. |
| 3 | * 输入形式可为 #fff000 #f00 | |
| 4 | * | |
| 5 | * @param String color 十六进制颜色值 | |
| 6 | * @return Boolean | |
| 7 | */ | |
| 8 | export const isHexColor = (color: string) => { | |
| 9 | const reg = /^#([0-9a-fA-F]{3}|[0-9a-fA-f]{6})$/ | |
| 10 | return reg.test(color) | |
| 11 | } | |
| 12 | ||
| 13 | /** | |
| 14 | * RGB 颜色值转换为 十六进制颜色值. | |
| 15 | * r, g, 和 b 需要在 [0, 255] 范围内 | |
| 16 | * | |
| 17 | * @return String 类似#ff00ff | |
| 18 | * @param r | |
| 19 | * @param g | |
| 20 | * @param b | |
| 21 | */ | |
| 22 | export const rgbToHex = (r: number, g: number, b: number) => { | |
| 23 | // tslint:disable-next-line:no-bitwise | |
| 24 | const hex = ((r << 16) | (g << 8) | b).toString(16) | |
| 25 | return '#' + new Array(Math.abs(hex.length - 7)).join('0') + hex | |
| 26 | } | |
| 27 | ||
| 28 | /** | |
| 29 | * Transform a HEX color to its RGB representation | |
| 30 | * @param {string} hex The color to transform | |
| 31 | * @returns The RGB representation of the passed color | |
| 32 | */ | |
| 33 | export const hexToRGB = (hex: string, opacity?: number) => { | |
| 34 | let sHex = hex.toLowerCase() | |
| 35 | if (isHexColor(hex)) { | |
| 36 | if (sHex.length === 4) { | |
| 37 | let sColorNew = '#' | |
| 38 | for (let i = 1; i < 4; i += 1) { | |
| 39 | sColorNew += sHex.slice(i, i + 1).concat(sHex.slice(i, i + 1)) | |
| 40 | } | |
| 41 | sHex = sColorNew | |
| 42 | } | |
| 43 | const sColorChange: number[] = [] | |
| 44 | for (let i = 1; i < 7; i += 2) { | |
| 45 | sColorChange.push(parseInt('0x' + sHex.slice(i, i + 2))) | |
| 46 | } | |
| 47 | return opacity | |
| 48 | ? 'RGBA(' + sColorChange.join(',') + ',' + opacity + ')' | |
| 49 | : 'RGB(' + sColorChange.join(',') + ')' | |
| 50 | } | |
| 51 | return sHex | |
| 52 | } | |
| 53 | ||
| 54 | export const colorIsDark = (color: string) => { | |
| 55 | if (!isHexColor(color)) return | |
| 56 | const [r, g, b] = hexToRGB(color) | |
| 57 | .replace(/(?:\(|\)|rgb|RGB)*/g, '') | |
| 58 | .split(',') | |
| 59 | .map((item) => Number(item)) | |
| 60 | return r * 0.299 + g * 0.578 + b * 0.114 < 192 | |
| 61 | } | |
| 62 | ||
| 63 | /** | |
| 64 | * Darkens a HEX color given the passed percentage | |
| 65 | * @param {string} color The color to process | |
| 66 | * @param {number} amount The amount to change the color by | |
| 67 | * @returns {string} The HEX representation of the processed color | |
| 68 | */ | |
| 69 | export const darken = (color: string, amount: number) => { | |
| 70 | color = color.indexOf('#') >= 0 ? color.substring(1, color.length) : color | |
| 71 | amount = Math.trunc((255 * amount) / 100) | |
| 72 | return `#${subtractLight(color.substring(0, 2), amount)}${subtractLight( | |
| 73 | color.substring(2, 4), | |
| 74 | amount | |
| 75 | )}${subtractLight(color.substring(4, 6), amount)}` | |
| 76 | } | |
| 77 | ||
| 78 | /** | |
| 79 | * Lightens a 6 char HEX color according to the passed percentage | |
| 80 | * @param {string} color The color to change | |
| 81 | * @param {number} amount The amount to change the color by | |
| 82 | * @returns {string} The processed color represented as HEX | |
| 83 | */ | |
| 84 | export const lighten = (color: string, amount: number) => { | |
| 85 | color = color.indexOf('#') >= 0 ? color.substring(1, color.length) : color | |
| 86 | amount = Math.trunc((255 * amount) / 100) | |
| 87 | return `#${addLight(color.substring(0, 2), amount)}${addLight( | |
| 88 | color.substring(2, 4), | |
| 89 | amount | |
| 90 | )}${addLight(color.substring(4, 6), amount)}` | |
| 91 | } | |
| 92 | ||
| 93 | /* Suma el porcentaje indicado a un color (RR, GG o BB) hexadecimal para aclararlo */ | |
| 94 | /** | |
| 95 | * Sums the passed percentage to the R, G or B of a HEX color | |
| 96 | * @param {string} color The color to change | |
| 97 | * @param {number} amount The amount to change the color by | |
| 98 | * @returns {string} The processed part of the color | |
| 99 | */ | |
| 100 | const addLight = (color: string, amount: number) => { | |
| 101 | const cc = parseInt(color, 16) + amount | |
| 102 | const c = cc > 255 ? 255 : cc | |
| 103 | return c.toString(16).length > 1 ? c.toString(16) : `0${c.toString(16)}` | |
| 104 | } | |
| 105 | ||
| 106 | /** | |
| 107 | * Calculates luminance of an rgb color | |
| 108 | * @param {number} r red | |
| 109 | * @param {number} g green | |
| 110 | * @param {number} b blue | |
| 111 | */ | |
| 112 | const luminanace = (r: number, g: number, b: number) => { | |
| 113 | const a = [r, g, b].map((v) => { | |
| 114 | v /= 255 | |
| 115 | return v <= 0.03928 ? v / 12.92 : Math.pow((v + 0.055) / 1.055, 2.4) | |
| 116 | }) | |
| 117 | return a[0] * 0.2126 + a[1] * 0.7152 + a[2] * 0.0722 | |
| 118 | } | |
| 119 | ||
| 120 | /** | |
| 121 | * Calculates contrast between two rgb colors | |
| 122 | * @param {string} rgb1 rgb color 1 | |
| 123 | * @param {string} rgb2 rgb color 2 | |
| 124 | */ | |
| 125 | const contrast = (rgb1: string[], rgb2: number[]) => { | |
| 126 | return ( | |
| 127 | (luminanace(~~rgb1[0], ~~rgb1[1], ~~rgb1[2]) + 0.05) / | |
| 128 | (luminanace(rgb2[0], rgb2[1], rgb2[2]) + 0.05) | |
| 129 | ) | |
| 130 | } | |
| 131 | ||
| 132 | /** | |
| 133 | * Determines what the best text color is (black or white) based con the contrast with the background | |
| 134 | * @param hexColor - Last selected color by the user | |
| 135 | */ | |
| 136 | export const calculateBestTextColor = (hexColor: string) => { | |
| 137 | const rgbColor = hexToRGB(hexColor.substring(1)) | |
| 138 | const contrastWithBlack = contrast(rgbColor.split(','), [0, 0, 0]) | |
| 139 | ||
| 140 | return contrastWithBlack >= 12 ? '#000000' : '#FFFFFF' | |
| 141 | } | |
| 142 | ||
| 143 | /** | |
| 144 | * Subtracts the indicated percentage to the R, G or B of a HEX color | |
| 145 | * @param {string} color The color to change | |
| 146 | * @param {number} amount The amount to change the color by | |
| 147 | * @returns {string} The processed part of the color | |
| 148 | */ | |
| 149 | const subtractLight = (color: string, amount: number) => { | |
| 150 | const cc = parseInt(color, 16) - amount | |
| 151 | const c = cc < 0 ? 0 : cc | |
| 152 | return c.toString(16).length > 1 ? c.toString(16) : `0${c.toString(16)}` | |
| 153 | } | |
| 154 | ||
| 155 | // 预设颜色 | |
| 156 | export const PREDEFINE_COLORS = [ | |
| 157 | '#ff4500', | |
| 158 | '#ff8c00', | |
| 159 | '#ffd700', | |
| 160 | '#90ee90', | |
| 161 | '#00ced1', | |
| 162 | '#1e90ff', | |
| 163 | '#c71585', | |
| 164 | '#409EFF', | |
| 165 | '#909399', | |
| 166 | '#C0C4CC', | |
| 167 | '#b7390b', | |
| 168 | '#ff7800', | |
| 169 | '#fad400', | |
| 170 | '#5b8c5f', | |
| 171 | '#00babd', | |
| 172 | '#1f73c3', | |
| 173 | '#711f57' | |
| 174 | ] | |
