/*
* jQuery Color Animations
* Copyright 2007 John Resig
* Released under the MIT and GPL licenses.
*
* RGBA support by Mehdi Kabab <http://pioupioum.fr>
*/

(function (jQuery) {
    jQuery.extend(jQuery.support, {
        "rgba": supportsRGBA()
    });

    // We override the animation for all of these color styles
    jQuery.each(['backgroundColor', 'borderBottomColor', 'borderLeftColor', 'borderRightColor', 'borderTopColor', 'color', 'outlineColor'], function (i, attr) {
        jQuery.fx.step[attr] = function (fx) {
            var tuples = [];
            if (!fx.colorInit) {
                fx.start = getColor(fx.elem, attr);
                fx.end = getRGB(fx.end);
                fx.alphavalue = {
                    start: 4 === fx.start.length,
                    end: 4 === fx.end.length
                };
                if (!fx.alphavalue.start) {
                    fx.start.push(1);
                }
                if (!fx.alphavalue.end) {
                    fx.end.push(1);
                }
                if (jQuery.support.rgba &&
                     (!fx.alphavalue.start && fx.alphavalue.end) || // RGB => RGBA
                     (fx.alphavalue.start && fx.alphavalue.end) || // RGBA => RGBA
                     (fx.alphavalue.start && !fx.alphavalue.end)    // RGBA => RGB
                ) {
                    fx.colorModel = 'rgba';
                } else {
                    fx.colorModel = 'rgb';
                }
                fx.colorInit = true;
            }

            tuples.push(Math.max(Math.min(parseInt((fx.pos * (fx.end[0] - fx.start[0])) + fx.start[0]), 255), 0)); // R
            tuples.push(Math.max(Math.min(parseInt((fx.pos * (fx.end[1] - fx.start[1])) + fx.start[1]), 255), 0)); // G
            tuples.push(Math.max(Math.min(parseInt((fx.pos * (fx.end[2] - fx.start[2])) + fx.start[2]), 255), 0)); // B

            if (fx.colorModel == 'rgba') {
                // Alpha
                tuples.push(Math.max(Math.min(parseFloat((fx.pos * (fx.end[3] - fx.start[3])) + fx.start[3]), 1), 0).toFixed(2));
            }

            fx.elem.style[attr] = fx.colorModel + "(" + tuples.join(",") + ")";
        };
    });

    // Color Conversion functions from highlightFade
    // By Blair Mitchelmore
    // http://jquery.offput.ca/highlightFade/

    // Parse strings looking for color tuples [255,255,255[,1]]
    function getRGB(color) {
        var result, ret,
            ralpha = '(?:,\\s*((?:1|0)(?:\\.0+)?|(?:0?\\.[0-9]+))\\s*)?\\)',
            rrgbdecimal = new RegExp('rgb(a)?\\(\\s*([0-9]{1,3})\\s*,\\s*([0-9]{1,3})\\s*,\\s*([0-9]{1,3})\\s*' + ralpha),
            rrgbpercent = new RegExp('rgb(a)?\\(\\s*([0-9]+(?:\\.[0-9]+)?)\\%\\s*,\\s*([0-9]+(?:\\.[0-9]+)?)\\%\\s*,\\s*([0-9]+(?:\\.[0-9]+)?)\\%\\s*' + ralpha);

        // Check if we're already dealing with an array of colors
        if (color && color.constructor == Array && color.length >= 3 && color.length <= 4) {
            return color;
        }

        // Look for #a0b1c2
        if (result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(color)) {
            return [parseInt(result[1], 16), parseInt(result[2], 16), parseInt(result[3], 16)];
        }

        // Look for #fff
        if (result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(color)) {
            return [parseInt(result[1] + result[1], 16), parseInt(result[2] + result[2], 16), parseInt(result[3] + result[3], 16)];
        }

        // Look for rgb[a](num,num,num[,num])
        if (result = rrgbdecimal.exec(color)) {
            ret = [parseInt(result[2]), parseInt(result[3]), parseInt(result[4])];
            // is rgba?
            if (result[1] && result[5]) {
                ret.push(parseFloat(result[5]));
            }

            return ret;
        }

        // Look for rgb[a](num%,num%,num%[,num])
        if (result = rrgbpercent.exec(color)) {
            ret = [parseFloat(result[2]) * 2.55, parseFloat(result[3]) * 2.55, parseFloat(result[4]) * 2.55];
            // is rgba?
            if (result[1] && result[5]) {
                ret.push(parseFloat(result[5]));
            }

            return ret;
        }

        // Otherwise, we're most likely dealing with a named color
        return colors[jQuery.trim(color).toLowerCase()];
    }

    function getColor(elem, attr) {
        var color;

        do {
            color = jQuery.curCSS(elem, attr);

            // Keep going until we find an element that has color, or we hit the body
            if (color != '' && color != 'transparent' || jQuery.nodeName(elem, "body"))
                break;

            attr = "backgroundColor";
        } while (elem = elem.parentNode);

        return getRGB(color);
    };

    function supportsRGBA() {
        var $script = jQuery('script:first'),
            color = $script.css('color'),
            result = false;
        if (/^rgba/.test(color)) {
            result = true;
        } else {
            try {
                result = (color != $script.css('color', 'rgba(0, 0, 0, 0.5)').css('color'));
                $script.css('color', color);
            } catch (e) { };
        }

        return result;
    };

    // Some named colors to work with
    // From Interface by Stefan Petre
    // http://interface.eyecon.ro/

    var colors = {
        aqua: [0, 255, 255],
        azure: [240, 255, 255],
        beige: [245, 245, 220],
        black: [0, 0, 0],
        blue: [0, 0, 255],
        brown: [165, 42, 42],
        cyan: [0, 255, 255],
        darkblue: [0, 0, 139],
        darkcyan: [0, 139, 139],
        darkgrey: [169, 169, 169],
        darkgreen: [0, 100, 0],
        darkkhaki: [189, 183, 107],
        darkmagenta: [139, 0, 139],
        darkolivegreen: [85, 107, 47],
        darkorange: [255, 140, 0],
        darkorchid: [153, 50, 204],
        darkred: [139, 0, 0],
        darksalmon: [233, 150, 122],
        darkviolet: [148, 0, 211],
        fuchsia: [255, 0, 255],
        gold: [255, 215, 0],
        green: [0, 128, 0],
        indigo: [75, 0, 130],
        khaki: [240, 230, 140],
        lightblue: [173, 216, 230],
        lightcyan: [224, 255, 255],
        lightgreen: [144, 238, 144],
        lightgrey: [211, 211, 211],
        lightpink: [255, 182, 193],
        lightyellow: [255, 255, 224],
        lime: [0, 255, 0],
        magenta: [255, 0, 255],
        maroon: [128, 0, 0],
        navy: [0, 0, 128],
        olive: [128, 128, 0],
        orange: [255, 165, 0],
        pink: [255, 192, 203],
        purple: [128, 0, 128],
        violet: [128, 0, 128],
        red: [255, 0, 0],
        silver: [192, 192, 192],
        white: [255, 255, 255],
        yellow: [255, 255, 0],
        transparent: (jQuery.support.rgba) ? [0, 0, 0, 0] : [255, 255, 255]
    };

})(jQuery);