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/*!
 * jQuery Color Animations v2.0pre
 * http://jquery.org/
 *
 * Copyright 2011 John Resig
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 */

(function( jQuery, undefined ){
        var stepHooks = "backgroundColor borderBottomColor borderLeftColor borderRightColor borderTopColor color outlineColor".split(" "),

                // plusequals test for += 100 -= 100
                rplusequals = /^([\-+])=\s*(\d+\.?\d*)/,
                // a set of RE's that can match strings and generate color tuples.
                stringParsers = [{
                                re: /rgba?\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*(?:,\s*(\d+(?:\.\d+)?)\s*)?\)/,
                                parse: function( execResult ) {
                                        return [
                                                execResult[ 1 ],
                                                execResult[ 2 ],
                                                execResult[ 3 ],
                                                execResult[ 4 ]
                                        ];
                                }
                        }, {
                                re: /rgba?\(\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*(?:,\s*(\d+(?:\.\d+)?)\s*)?\)/,
                                parse: function( execResult ) {
                                        return [
                                                2.55 * execResult[1],
                                                2.55 * execResult[2],
                                                2.55 * execResult[3],
                                                execResult[ 4 ]
                                        ];
                                }
                        }, {
                                re: /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/,
                                parse: function( execResult ) {
                                        return [
                                                parseInt( execResult[ 1 ], 16 ),
                                                parseInt( execResult[ 2 ], 16 ),
                                                parseInt( execResult[ 3 ], 16 )
                                        ];
                                }
                        }, {
                                re: /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/,
                                parse: function( execResult ) {
                                        return [
                                                parseInt( execResult[ 1 ] + execResult[ 1 ], 16 ),
                                                parseInt( execResult[ 2 ] + execResult[ 2 ], 16 ),
                                                parseInt( execResult[ 3 ] + execResult[ 3 ], 16 )
                                        ];
                                }
                        }, {
                                re: /hsla?\(\s*(\d+(?:\.\d+)?)\s*,\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*(?:,\s*(\d+(?:\.\d+)?)\s*)?\)/,
                                space: "hsla",
                                parse: function( execResult ) {
                                        return [
                                                execResult[1],
                                                execResult[2] / 100,
                                                execResult[3] / 100,
                                                execResult[4]
                                        ];
                                }
                        }],

                // jQuery.Color( )
                color = jQuery.Color = function( color, green, blue, alpha ) {
                        return new jQuery.Color.fn.parse( color, green, blue, alpha );
                },
                spaces = {
                        rgba: {
                                cache: "_rgba",
                                props: {
                                        red: {
                                                idx: 0,
                                                type: "byte",
                                                empty: true
                                        },
                                        green: {
                                                idx: 1,
                                                type: "byte",
                                                empty: true
                                        },
                                        blue: {
                                                idx: 2,
                                                type: "byte",
                                                empty: true
                                        },
                                        alpha: {
                                                idx: 3,
                                                type: "percent",
                                                def: 1
                                        }
                                }
                        },
                        hsla: {
                                cache: "_hsla",
                                props: {
                                        hue: {
                                                idx: 0,
                                                type: "degrees",
                                                empty: true
                                        },
                                        saturation: {
                                                idx: 1,
                                                type: "percent",
                                                empty: true
                                        },
                                        lightness: {
                                                idx: 2,
                                                type: "percent",
                                                empty: true
                                        }
                                }
                        }
                },
                propTypes = {
                        "byte": {
                                floor: true,
                                min: 0,
                                max: 255
                        },
                        "percent": {
                                min: 0,
                                max: 1
                        },
                        "degrees": {
                                mod: 360,
                                floor: true
                        }
                },
                rgbaspace = spaces.rgba.props,
                support = color.support = {},

                // colors = jQuery.Color.names
                colors,

                // local aliases of functions called often
                each = jQuery.each;

        spaces.hsla.props.alpha = rgbaspace.alpha;

        function clamp( value, prop, alwaysAllowEmpty ) {
                var type = propTypes[ prop.type ] || {},
                        allowEmpty = prop.empty || alwaysAllowEmpty;

                if ( allowEmpty && value == null ) {
                        return null;
                }
                if ( prop.def && value == null ) {
                        return prop.def;
                }
                if ( type.floor ) {
                        value = ~~value;
                } else {
                        value = parseFloat( value );
                }
                if ( value == null || isNaN( value ) ) {
                        return prop.def;
                }
                if ( type.mod ) {
                        value = value % type.mod;
                        // -10 -> 350
                        return value < 0 ? type.mod + value : value;
                }

                // for now all property types without mod have min and max
                return type.min > value ? type.min : type.max < value ? type.max : value;
        }

        function stringParse( string ) {
                var inst = color(),
                        rgba = inst._rgba = [];

                string = string.toLowerCase();

                each( stringParsers, function( i, parser ) {
                        var match = parser.re.exec( string ),
                                values = match && parser.parse( match ),
                                parsed,
                                spaceName = parser.space || "rgba",
                                cache = spaces[ spaceName ].cache;


                        if ( values ) {
                                parsed = inst[ spaceName ]( values );

                                // if this was an rgba parse the assignment might happen twice
                                // oh well....
                                inst[ cache ] = parsed[ cache ];
                                rgba = inst._rgba = parsed._rgba;

                                // exit each( stringParsers ) here because we matched
                                return false;
                        }
                });

                // Found a stringParser that handled it
                if ( rgba.length !== 0 ) {

                        // if this came from a parsed string, force "transparent" when alpha is 0
                        // chrome, (and maybe others) return "transparent" as rgba(0,0,0,0)
                        if ( Math.max.apply( Math, rgba ) === 0 ) {
                                jQuery.extend( rgba, colors.transparent );
                        }
                        return inst;
                }

                // named colors / default - filter back through parse function
                if ( string = colors[ string ] ) {
                        return string;
                }
        }

        color.fn = color.prototype = {
                constructor: color,
                parse: function( red, green, blue, alpha ) {
                        if ( red === undefined ) {
                                this._rgba = [ null, null, null, null ];
                                return this;
                        }
                        if ( red instanceof jQuery || red.nodeType ) {
                                red = red instanceof jQuery ? red.css( green ) : jQuery( red ).css( green );
                                green = undefined;
                        }

                        var inst = this,
                                type = jQuery.type( red ),
                                rgba = this._rgba = [],
                                source;

                        // more than 1 argument specified - assume ( red, green, blue, alpha )
                        if ( green !== undefined ) {
                                red = [ red, green, blue, alpha ];
                                type = "array";
                        }

                        if ( type === "string" ) {
                                return this.parse( stringParse( red ) || colors._default );
                        }

                        if ( type === "array" ) {
                                each( rgbaspace, function( key, prop ) {
                                        rgba[ prop.idx ] = clamp( red[ prop.idx ], prop );
                                });
                                return this;
                        }

                        if ( type === "object" ) {
                                if ( red instanceof color ) {
                                        each( spaces, function( spaceName, space ) {
                                                if ( red[ space.cache ] ) {
                                                        inst[ space.cache ] = red[ space.cache ].slice();
                                                }
                                        });
                                } else {
                                        each( spaces, function( spaceName, space ) {
                                                each( space.props, function( key, prop ) {
                                                        var cache = space.cache;

                                                        // if the cache doesn't exist, and we know how to convert
                                                        if ( !inst[ cache ] && space.to ) {

                                                                // if the value was null, we don't need to copy it
                                                                // if the key was alpha, we don't need to copy it either
                                                                if ( red[ key ] == null || key === "alpha") {
                                                                        return;
                                                                }
                                                                inst[ cache ] = space.to( inst._rgba );
                                                        }

                                                        // this is the only case where we allow nulls for ALL properties.
                                                        // call clamp with alwaysAllowEmpty
                                                        inst[ cache ][ prop.idx ] = clamp( red[ key ], prop, true );
                                                });
                                        });
                                }
                                return this;
                        }
                },
                is: function( compare ) {
                        var is = color( compare ),
                                same = true,
                                myself = this;

                        each( spaces, function( _, space ) {
                                var isCache = is[ space.cache ],
                                        localCache;
                                if (isCache) {
                                        localCache = myself[ space.cache ] || space.to && space.to( myself._rgba ) || [];
                                        each( space.props, function( _, prop ) {
                                                if ( isCache[ prop.idx ] != null ) {
                                                        same = ( isCache[ prop.idx ] === localCache[ prop.idx ] );
                                                        return same;
                                                }
                                        });
                                }
                                return same;
                        });
                        return same;
                },
                _space: function() {
                        var used = [],
                                inst = this;
                        each( spaces, function( spaceName, space ) {
                                if ( inst[ space.cache ] ) {
                                        used.push( spaceName );
                                }
                        });
                        return used.pop();
                },
                transition: function( other, distance ) {
                        var end = color( other ),
                                spaceName = end._space(),
                                space = spaces[ spaceName ],
                                start = this[ space.cache ] || space.to( this._rgba ),
                                result = start.slice();

                        end = end[ space.cache ];
                        each( space.props, function( key, prop ) {
                                var index = prop.idx,
                                        startValue = start[ index ],
                                        endValue = end[ index ],
                                        type = propTypes[ prop.type ] || {};

                                // if null, don't override start value
                                if ( endValue === null ) {
                                        return;
                                }
                                // if null - use end
                                if ( startValue === null ) {
                                        result[ index ] = endValue;
                                } else {
                                        if ( type.mod ) {
                                                if ( endValue - startValue > type.mod / 2 ) {
                                                        startValue += type.mod;
                                                } else if ( startValue - endValue > type.mod / 2 ) {
                                                        startValue -= type.mod;
                                                }
                                        }
                                        result[ prop.idx ] = clamp( ( endValue - startValue ) * distance + startValue, prop );
                                }
                        });
                        return this[ spaceName ]( result );
                },
                blend: function( opaque ) {
                        // if we are already opaque - return ourself
                        if ( this._rgba[ 3 ] === 1 ) {
                                return this;
                        }

                        var rgb = this._rgba.slice(),
                                a = rgb.pop(),
                                blend = color( opaque )._rgba;

                        return color( jQuery.map( rgb, function( v, i ) {
                                return ( 1 - a ) * blend[ i ] + a * v;
                        }));
                },
                toRgbaString: function() {
                        var prefix = "rgba(",
                                rgba = jQuery.map( this._rgba, function( v, i ) {
                                        return v == null ? ( i > 2 ? 1 : 0 ) : v;
                                });

                        if ( rgba[ 3 ] === 1 ) {
                                rgba.pop();
                                prefix = "rgb(";
                        }

                        return prefix + rgba.join(",") + ")";
                },
                toHslaString: function() {
                        var prefix = "hsla(",
                                hsla = jQuery.map( this.hsla(), function( v, i ) {
                                        if ( v == null ) {
                                                v = i > 2 ? 1 : 0;
                                        }

                                        // catch 1 and 2
                                        if ( i && i < 3 ) {
                                                v = Math.round( v * 100 ) + "%";
                                        }
                                        return v;
                                });

                        if ( hsla[ 3 ] === 1 ) {
                                hsla.pop();
                                prefix = "hsl(";
                        }
                        return prefix + hsla.join(",") + ")";
                },
                toHexString: function( includeAlpha ) {
                        var rgba = this._rgba.slice(),
                                alpha = rgba.pop();

                        if ( includeAlpha ) {
                                rgba.push( ~~( alpha * 255 ) );
                        }

                        return "#" + jQuery.map( rgba, function( v, i ) {

                                // default to 0 when nulls exist
                                v = ( v || 0 ).toString( 16 );
                                return v.length === 1 ? "0" + v : v;
                        }).join("");
                },
                toString: function() {
                        return this._rgba[ 3 ] === 0 ? "transparent" : this.toRgbaString();
                }
        };
        color.fn.parse.prototype = color.fn;

        // hsla conversions adapted from:
        // http://www.google.com/codesearch/p#OAMlx_jo-ck/src/third_party/WebKit/Source/WebCore/inspector/front-end/Color.js&d=7&l=193

        function hue2rgb( p, q, h ) {
                h = ( h + 1 ) % 1;
                if ( h * 6 < 1 ) {
                        return p + (q - p) * 6 * h;
                }
                if ( h * 2 < 1) {
                        return q;
                }
                if ( h * 3 < 2 ) {
                        return p + (q - p) * ((2/3) - h) * 6;
                }
                return p;
        }

        spaces.hsla.to = function ( rgba ) {
                if ( rgba[ 0 ] == null || rgba[ 1 ] == null || rgba[ 2 ] == null ) {
                        return [ null, null, null, rgba[ 3 ] ];
                }
                var r = rgba[ 0 ] / 255,
                        g = rgba[ 1 ] / 255,
                        b = rgba[ 2 ] / 255,
                        a = rgba[ 3 ],
                        max = Math.max( r, g, b ),
                        min = Math.min( r, g, b ),
                        diff = max - min,
                        add = max + min,
                        l = add * 0.5,
                        h, s;

                if ( min === max ) {
                        h = 0;
                } else if ( r === max ) {
                        h = ( 60 * ( g - b ) / diff ) + 360;
                } else if ( g === max ) {
                        h = ( 60 * ( b - r ) / diff ) + 120;
                } else {
                        h = ( 60 * ( r - g ) / diff ) + 240;
                }

                if ( l === 0 || l === 1 ) {
                        s = l;
                } else if ( l <= 0.5 ) {
                        s = diff / add;
                } else {
                        s = diff / ( 2 - add );
                }
                return [ Math.round(h) % 360, s, l, a == null ? 1 : a ];
        };

        spaces.hsla.from = function ( hsla ) {
                if ( hsla[ 0 ] == null || hsla[ 1 ] == null || hsla[ 2 ] == null ) {
                        return [ null, null, null, hsla[ 3 ] ];
                }
                var h = hsla[ 0 ] / 360,
                        s = hsla[ 1 ],
                        l = hsla[ 2 ],
                        a = hsla[ 3 ],
                        q = l <= 0.5 ? l * ( 1 + s ) : l + s - l * s,
                        p = 2 * l - q,
                        r, g, b;

                return [
                        Math.round( hue2rgb( p, q, h + ( 1 / 3 ) ) * 255 ),
                        Math.round( hue2rgb( p, q, h ) * 255 ),
                        Math.round( hue2rgb( p, q, h - ( 1 / 3 ) ) * 255 ),
                        a
                ];
        };


        each( spaces, function( spaceName, space ) {
                var props = space.props,
                        cache = space.cache,
                        to = space.to,
                        from = space.from;

                // makes rgba() and hsla()
                color.fn[ spaceName ] = function( value ) {

                        // generate a cache for this space if it doesn't exist
                        if ( to && !this[ cache ] ) {
                                this[ cache ] = to( this._rgba );
                        }
                        if ( value === undefined ) {
                                return this[ cache ].slice();
                        }

                        var type = jQuery.type( value ),
                                arr = ( type === "array" || type === "object" ) ? value : arguments,
                                local = this[ cache ].slice(),
                                ret;

                        each( props, function( key, prop ) {
                                var val = arr[ type === "object" ? key : prop.idx ];
                                if ( val == null ) {
                                        val = local[ prop.idx ];
                                }
                                local[ prop.idx ] = clamp( val, prop );
                        });

                        if ( from ) {
                                ret = color( from( local ) );
                                ret[ cache ] = local;
                                return ret;
                        } else {
                                return color( local );
                        }
                };

                // makes red() green() blue() alpha() hue() saturation() lightness()
                each( props, function( key, prop ) {
                        // alpha is included in more than one space
                        if ( color.fn[ key ] ) {
                                return;
                        }
                        color.fn[ key ] = function( value ) {
                                var vtype = jQuery.type( value ),
                                        fn = ( key === 'alpha' ? ( this._hsla ? 'hsla' : 'rgba' ) : spaceName ),
                                        local = this[ fn ](),
                                        cur = local[ prop.idx ],
                                        match;

                                if ( vtype === "undefined" ) {
                                        return cur;
                                }

                                if ( vtype === "function" ) {
                                        value = value.call( this, cur );
                                        vtype = jQuery.type( value );
                                }
                                if ( value == null && prop.empty ) {
                                        return this;
                                }
                                if ( vtype === "string" ) {
                                        match = rplusequals.exec( value );
                                        if ( match ) {
                                                value = cur + parseFloat( match[ 2 ] ) * ( match[ 1 ] === "+" ? 1 : -1 );
                                        }
                                }
                                local[ prop.idx ] = value;
                                return this[ fn ]( local );
                        };
                });
        });

        // add .fx.step functions
        each( stepHooks, function( i, hook ) {
                jQuery.cssHooks[ hook ] = {
                        set: function( elem, value ) {
                                var parsed, backgroundColor, curElem;

                                if ( jQuery.type( value ) !== 'string' || ( parsed = stringParse( value ) ) )
                                {
                                        value = color( parsed || value );
                                        if ( !support.rgba && value._rgba[ 3 ] !== 1 ) {
                                                curElem = hook === "backgroundColor" ? elem.parentNode : elem;
                                                do {
                                                        backgroundColor = jQuery.curCSS( curElem, "backgroundColor" );
                                                } while (
                                                        ( backgroundColor === "" || backgroundColor === "transparent" ) &&
                                                        ( curElem = curElem.parentNode ) &&
                                                        curElem.style
                                                );

                                                value = value.blend( backgroundColor && backgroundColor !== "transparent" ?
                                                        backgroundColor :
                                                        "_default" );
                                        }

                                        value = value.toRgbaString();
                                }
                                elem.style[ hook ] = value;
                        }
                };
                jQuery.fx.step[ hook ] = function( fx ) {
                        if ( !fx.colorInit ) {
                                fx.start = color( fx.elem, hook );
                                fx.end = color( fx.end );
                                fx.colorInit = true;
                        }
                        jQuery.cssHooks[ hook ].set( fx.elem, fx.start.transition( fx.end, fx.pos ) );
                };
        });

        // detect rgba support
        jQuery(function() {
                var div = document.createElement( "div" ),
                        div_style = div.style;

                div_style.cssText = "background-color:rgba(1,1,1,.5)";
                support.rgba = div_style.backgroundColor.indexOf( "rgba" ) > -1;
        });

        // Some named colors to work with
        // From Interface by Stefan Petre
        // http://interface.eyecon.ro/
        colors = jQuery.Color.names = {
                aqua: "#00ffff",
                azure: "#f0ffff",
                beige: "#f5f5dc",
                black: "#000000",
                blue: "#0000ff",
                brown: "#a52a2a",
                cyan: "#00ffff",
                darkblue: "#00008b",
                darkcyan: "#008b8b",
                darkgrey: "#a9a9a9",
                darkgreen: "#006400",
                darkkhaki: "#bdb76b",
                darkmagenta: "#8b008b",
                darkolivegreen: "#556b2f",
                darkorange: "#ff8c00",
                darkorchid: "#9932cc",
                darkred: "#8b0000",
                darksalmon: "#e9967a",
                darkviolet: "#9400d3",
                fuchsia: "#ff00ff",
                gold: "#ffd700",
                green: "#008000",
                indigo: "#4b0082",
                khaki: "#f0e68c",
                lightblue: "#add8e6",
                lightcyan: "#e0ffff",
                lightgreen: "#90ee90",
                lightgrey: "#d3d3d3",
                lightpink: "#ffb6c1",
                lightyellow: "#ffffe0",
                lime: "#00ff00",
                magenta: "#ff00ff",
                maroon: "#800000",
                navy: "#000080",
                olive: "#808000",
                orange: "#ffa500",
                pink: "#ffc0cb",
                purple: "#800080",
                violet: "#800080",
                red: "#ff0000",
                silver: "#c0c0c0",
                white: "#ffffff",
                yellow: "#ffff00",
                transparent: [ null, null, null, 0 ],
                _default: "#ffffff"
        };
})( jQuery );