less.js/lib/less/node/color.js

if (typeof(window) === 'undefined') { var tree = require(require('path').join(__dirname, '..', '..', 'less', 'tree')); }
//
// RGB Colors - #ff0014, #eee
//
tree.Color = function Color(rgb, a) {
    if (Array.isArray(rgb)) {
        this.rgb = rgb;
        this.alpha = a;
    } else if (rgb.length == 6) {
        this.rgb = rgb.match(/.{2}/g).map(function (c) {
            return parseInt(c, 16);
        });
    } else {
        this.rgb = rgb.split('').map(function (c) {
            return parseInt(c + c, 16);
        });
    }
};
tree.Color.prototype = {
    eval: function () { return this },
    toCSS: function () {
        if (this.alpha && this.alpha < 1.0) {
            return "rgba(" + this.rgb.concat(this.alpha).join(', ') + ")";
        } else {
            return '#' + this.rgb.map(function (i) {
                i = Math.round(i);
                i = (i > 255 ? 255 : (i < 0 ? 0 : i)).toString(16);
                return i.length === 1 ? '0' + i : i;
            }).join('');
        }
    },
    operate: function (op, other) {
        var result = [];
        if (! (other instanceof tree.Color)) {
            other = other.toColor();
        }

        for (var c = 0; c < 3; c++) {
            result[c] = tree.operate(op, this.rgb[c], other.rgb[c]);
        }
        return new(tree.Color)(result);
    }
};