wcfsetup/install/files/js/WoltLabSuite/Core/ColorUtil.js

   1 define([], function() {
   2         "use strict";
   3
   4         var ColorUtil = {
   5                 /**
   6                  * Converts HEX into RGB.
   7                  *
   8                  * @param       string          hex     hex value as #ccc or #abc123
   9                  * @return      object          r-g-b values
  10                  */
  11                 hexToRgb: function(hex) {
  12                         hex = hex.replace(/^#/, '');
  13                         if (/^([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$/.test(hex)) {
  14                                 // only convert abc and abcdef
  15                                 hex = hex.split('');
  16
  17                                 // parse shorthand #xyz
  18                                 if (hex.length === 3) {
  19                                         return {
  20                                                 r: parseInt(hex[0] + '' + hex[0], 16),
  21                                                 g: parseInt(hex[1] + '' + hex[1], 16),
  22                                                 b: parseInt(hex[2] + '' + hex[2], 16)
  23                                         };
  24                                 }
  25                                 else {
  26                                         return {
  27                                                 r: parseInt(hex[0] + '' + hex[1], 16),
  28                                                 g: parseInt(hex[2] + '' + hex[3], 16),
  29                                                 b: parseInt(hex[4] + '' + hex[5], 16)
  30                                         };
  31                                 }
  32                         }
  33
  34                         return Number.NaN;
  35                 },
  36
  37                 /**
  38                  * Converts RGB into HEX.
  39                  *
  40                  * @see http://www.linuxtopia.org/online_books/javascript_guides/javascript_faq/rgbtohex.htm
  41                  *
  42                  * @param       {(int|string)}  r       red or rgb(1, 2, 3) or rgba(1, 2, 3, .4)
  43                  * @param       {int}           g       green
  44                  * @param       {int}           b       blue
  45                  * @return      {string}        hex value #abc123
  46                  */
  47                 rgbToHex: function(r, g, b) {
  48                         var charList = "0123456789ABCDEF";
  49
  50                         if (g === undefined) {
  51                                 if (r.match(/^rgba?\((\d+), ?(\d+), ?(d\+)(?:, ?[0-9.]+)?\)$/)) {
  52                                         r = RegExp.$1;
  53                                         g = RegExp.$2;
  54                                         b = RegExp.$3;
  55                                 }
  56                         }
  57
  58                         return (charList.charAt((r - r % 16) / 16) + '' + charList.charAt(r % 16)) + '' + (charList.charAt((g - g % 16) / 16) + '' + charList.charAt(g % 16)) + '' + (charList.charAt((b - b % 16) / 16) + '' + charList.charAt(b % 16));
  59                 }
  60         };
  61
  62         return ColorUtil;
  63 });