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* rgb字符串解析
* - 换算公式改编自 http://en.wikipedia.org/wiki/HSL_color_space.
* - h, s, 和 l 设定在 [0, 1] 之间
* - 返回的 r, g, 和 b 在 [0, 255]之间
* @method util/parseRGB
* @param {String} color 16进制色值
* @returns {Array} RGB色值数值
* @example
* var $parseRGB = require('@spore-ui/kit/packages/util/parseRGB');
* $parseRGB('#ffffff'); // => [255,255,255]
* $parseRGB('#fff'); // => [255,255,255]
*/
const REG_HEX = /(^#?[0-9A-F]{6}$)|(^#?[0-9A-F]{3}$)/i;
function parseRGB(color) {
var str = color;
if (typeof str !== 'string') {
throw new Error('Color should be string');
}
if (!REG_HEX.test(str)) {
throw new Error('Wrong RGB color format');
}
str = str.replace('#', '');
var arr;
if (str.length === 3) {
arr = str.split('').map(function (c) {
return c + c;
});
} else {
arr = str.match(/[a-fA-F0-9]{2}/g);
}
arr.length = 3;
return arr.map(function (c) {
return parseInt(c, 16);
});
}
module.exports = parseRGB;
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