// script.aculo.us effects.js v1.8.0, Tue Nov 06 15:01:40 +0300 2007

// Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
// Contributors:
//  Justin Palmer (http://encytemedia.com/)
//  Mark Pilgrim (http://diveintomark.org/)
//  Martin Bialasinki
// 
// script.aculo.us is freely distributable under the terms of an MIT-style license.
// For details, see the script.aculo.us web site: http://script.aculo.us/ 

// converts rgb() and #xxx to #xxxxxx format,  
// returns self (or first argument) if not convertable  
String.prototype.parseColor = function()
{
    var color = '#';
    if (this.slice(0, 4) == 'rgb(')
    {
        var cols = this.slice(4, this.length - 1).split(',');
        var i = 0;
        do {
            color += parseInt(cols[i]).toColorPart()
        } while (++i < 3);
    }
    else
    {
        if (this.slice(0, 1) == '#')
        {
            if (this.length == 4) for (var i = 1; i < 4; i++) color += (this.charAt(i) + this.charAt(i)).toLowerCase();
            if (this.length == 7) color = this.toLowerCase();
        }
    }
    return (color.length == 7 ? color : (arguments[0] || this));
};

/*--------------------------------------------------------------------------*/

Element.collectTextNodes = function(element)
{
    return $A($(element).childNodes).collect(function(node)
    {
        return (node.nodeType == 3 ? node.nodeValue :
                (node.hasChildNodes() ? Element.collectTextNodes(node) : ''));
    }).flatten().join('');
};

Element.collectTextNodesIgnoreClass = function(element, className)
{
    return $A($(element).childNodes).collect(function(node)
    {
        return (node.nodeType == 3 ? node.nodeValue :
                ((node.hasChildNodes() && !Element.hasClassName(node, className)) ?
                 Element.collectTextNodesIgnoreClass(node, className) : ''));
    }).flatten().join('');
};

Element.setContentZoom = function(element, percent)
{
    element = $(element);
    element.setStyle({fontSize: (percent / 100) + 'em'});
    if (Prototype.Browser.WebKit) window.scrollBy(0, 0);
    return element;
};

Element.getInlineOpacity = function(element)
{
    return $(element).style.opacity || '';
};

Element.forceRerendering = function(element)
{
    try
    {
        element = $(element);
        var n = document.createTextNode(' ');
        element.appendChild(n);
        element.removeChild(n);
    }
    catch(e)
    {
    }
};

/*--------------------------------------------------------------------------*/

var Effect = {
    _elementDoesNotExistError: {
        name: 'ElementDoesNotExistError',
        message: 'The specified DOM element does not exist, but is required for this effect to operate'
    },
    Transitions: {
        linear: Prototype.K,
        sinoidal: function(pos)
        {
            return (-Math.cos(pos * Math.PI) / 2) + 0.5;
        },
        reverse: function(pos)
        {
            return 1 - pos;
        },
        flicker: function(pos)
        {
            var pos = ((-Math.cos(pos * Math.PI) / 4) + 0.75) + Math.random() / 4;
            return pos > 1 ? 1 : pos;
        },
        wobble: function(pos)
        {
            return (-Math.cos(pos * Math.PI * (9 * pos)) / 2) + 0.5;
        },
        pulse: function(pos, pulses)
        {
            pulses = pulses || 5;
            return (
                    ((pos % (1 / pulses)) * pulses).round() == 0 ?
                    ((pos * pulses * 2) - (pos * pulses * 2).floor()) :
                    1 - ((pos * pulses * 2) - (pos * pulses * 2).floor())
                    );
        },
        spring: function(pos)
        {
            return 1 - (Math.cos(pos * 4.5 * Math.PI) * Math.exp(-pos * 6));
        },
        none: function(pos)
        {
            return 0;
        },
        full: function(pos)
        {
            return 1;
        }
    },
    DefaultOptions: {
        duration:   1.0,   // seconds
        fps:        100,   // 100= assume 66fps max.
        sync:       false, // true for combining
        from:       0.0,
        to:         1.0,
        delay:      0.0,
        queue:      'parallel'
    },
    tagifyText: function(element)
    {
        var tagifyStyle = 'position:relative';
        if (Prototype.Browser.IE) tagifyStyle += ';zoom:1';

        element = $(element);
        $A(element.childNodes).each(function(child)
        {
            if (child.nodeType == 3)
            {
                child.nodeValue.toArray().each(function(character)
                {
                    element.insertBefore(
                            new Element('span', {style: tagifyStyle}).update(
                                    character == ' ' ? String.fromCharCode(160) : character),
                            child);
                });
                Element.remove(child);
            }
        });
    },
    multiple: function(element, effect)
    {
        var elements;
        if (((typeof element == 'object') ||
             Object.isFunction(element)) &&
            (element.length))
            elements = element;
        else
            elements = $(element).childNodes;

        var options = Object.extend({
            speed: 0.1,
            delay: 0.0
        }, arguments[2] || { });
        var masterDelay = options.delay;

        $A(elements).each(function(element, index)
        {
            new effect(element, Object.extend(options, { delay: index * options.speed + masterDelay }));
        });
    },
    PAIRS: {
        'slide':  ['SlideDown','SlideUp'],
        'blind':  ['BlindDown','BlindUp'],
        'appear': ['Appear','Fade']
    },
    toggle: function(element, effect)
    {
        element = $(element);
        effect = (effect || 'appear').toLowerCase();
        var options = Object.extend({
            queue: { position:'end', scope:(element.id || 'global'), limit: 1 }
        }, arguments[2] || { });
        Effect[element.visible() ?
               Effect.PAIRS[effect][1] : Effect.PAIRS[effect][0]](element, options);
    }
};

Effect.DefaultOptions.transition = Effect.Transitions.sinoidal;

/* ------------- core effects ------------- */

Effect.ScopedQueue = Class.create(Enumerable, {
    initialize: function()
    {
        this.effects = [];
        this.interval = null;
    },
    _each: function(iterator)
    {
        this.effects._each(iterator);
    },
    add: function(effect)
    {
        var timestamp = new Date().getTime();

        var position = Object.isString(effect.options.queue) ?
                       effect.options.queue : effect.options.queue.position;

        switch (position)
                {
            case 'front':
            // move unstarted effects after this effect
                this.effects.findAll(function(e)
                {
                    return e.state == 'idle'
                }).each(function(e)
                {
                    e.startOn += effect.finishOn;
                    e.finishOn += effect.finishOn;
                });
                break;
            case 'with-last':
                timestamp = this.effects.pluck('startOn').max() || timestamp;
                break;
            case 'end':
            // start effect after last queued effect has finished
                timestamp = this.effects.pluck('finishOn').max() || timestamp;
                break;
        }

        effect.startOn += timestamp;
        effect.finishOn += timestamp;

        if (!effect.options.queue.limit || (this.effects.length < effect.options.queue.limit))
            this.effects.push(effect);

        if (!this.interval)
            this.interval = setInterval(this.loop.bind(this), 15);
    },
    remove: function(effect)
    {
        this.effects = this.effects.reject(function(e)
        {
            return e == effect
        });
        if (this.effects.length == 0)
        {
            clearInterval(this.interval);
            this.interval = null;
        }
    },
    loop: function()
    {
        var timePos = new Date().getTime();
        for (var i = 0, len = this.effects.length; i < len; i++)
            this.effects[i] && this.effects[i].loop(timePos);
    }
});

Effect.Queues = {
    instances: $H(),
    get: function(queueName)
    {
        if (!Object.isString(queueName)) return queueName;

        return this.instances.get(queueName) ||
               this.instances.set(queueName, new Effect.ScopedQueue());
    }
};
Effect.Queue = Effect.Queues.get('global');

Effect.Base = Class.create({
    position: null,
    start: function(options)
    {
        function codeForEvent(options, eventName)
        {
            return (
                    (options[eventName + 'Internal'] ? 'this.options.' + eventName + 'Internal(this);' : '') +
                    (options[eventName] ? 'this.options.' + eventName + '(this);' : '')
                    );
        }
        if (options && options.transition === false) options.transition = Effect.Transitions.linear;
        this.options = Object.extend(Object.extend({ }, Effect.DefaultOptions), options || { });
        this.currentFrame = 0;
        this.state = 'idle';
        this.startOn = this.options.delay * 1000;
        this.finishOn = this.startOn + (this.options.duration * 1000);
        this.fromToDelta = this.options.to - this.options.from;
        this.totalTime = this.finishOn - this.startOn;
        this.totalFrames = this.options.fps * this.options.duration;

        eval('this.render = function(pos){ ' +
             'if (this.state=="idle"){this.state="running";' +
             codeForEvent(this.options, 'beforeSetup') +
             (this.setup ? 'this.setup();' : '') +
             codeForEvent(this.options, 'afterSetup') +
             '};if (this.state=="running"){' +
             'pos=this.options.transition(pos)*' + this.fromToDelta + '+' + this.options.from + ';' +
             'this.position=pos;' +
             codeForEvent(this.options, 'beforeUpdate') +
             (this.update ? 'this.update(pos);' : '') +
             codeForEvent(this.options, 'afterUpdate') +
             '}}');

        this.event('beforeStart');
        if (!this.options.sync)
            Effect.Queues.get(Object.isString(this.options.queue) ?
                              'global' : this.options.queue.scope).add(this);
    },
    loop: function(timePos)
    {
        if (timePos >= this.startOn)
        {
            if (timePos >= this.finishOn)
            {
                this.render(1.0);
                this.cancel();
                this.event('beforeFinish');
                if (this.finish) this.finish();
                this.event('afterFinish');
                return;
            }
            var pos = (timePos - this.startOn) / this.totalTime,
                    frame = (pos * this.totalFrames).round();
            if (frame > this.currentFrame)
            {
                this.render(pos);
                this.currentFrame = frame;
            }
        }
    },
    cancel: function()
    {
        if (!this.options.sync)
            Effect.Queues.get(Object.isString(this.options.queue) ?
                              'global' : this.options.queue.scope).remove(this);
        this.state = 'finished';
    },
    event: function(eventName)
    {
        if (this.options[eventName + 'Internal']) this.options[eventName + 'Internal'](this);
        if (this.options[eventName]) this.options[eventName](this);
    },
    inspect: function()
    {
        var data = $H();
        for (property in this)
            if (!Object.isFunction(this[property])) data.set(property, this[property]);
        return '#<Effect:' + data.inspect() + ',options:' + $H(this.options).inspect() + '>';
    }
});

Effect.Parallel = Class.create(Effect.Base, {
    initialize: function(effects)
    {
        this.effects = effects || [];
        this.start(arguments[1]);
    },
    update: function(position)
    {
        this.effects.invoke('render', position);
    },
    finish: function(position)
    {
        this.effects.each(function(effect)
        {
            effect.render(1.0);
            effect.cancel();
            effect.event('beforeFinish');
            if (effect.finish) effect.finish(position);
            effect.event('afterFinish');
        });
    }
});

Effect.Tween = Class.create(Effect.Base, {
    initialize: function(object, from, to)
    {
        object = Object.isString(object) ? $(object) : object;
        var args = $A(arguments), method = args.last(),
                options = args.length == 5 ? args[3] : null;
        this.method = Object.isFunction(method) ? method.bind(object) :
                      Object.isFunction(object[method]) ? object[method].bind(object) :
                      function(value)
                      {
                          object[method] = value
                      };
        this.start(Object.extend({ from: from, to: to }, options || { }));
    },
    update: function(position)
    {
        this.method(position);
    }
});

Effect.Event = Class.create(Effect.Base, {
    initialize: function()
    {
        this.start(Object.extend({ duration: 0 }, arguments[0] || { }));
    },
    update: Prototype.emptyFunction
});

Effect.Opacity = Class.create(Effect.Base, {
    initialize: function(element)
    {
        this.element = $(element);
        if (!this.element) throw(Effect._elementDoesNotExistError);
    // make this work on IE on elements without 'layout'
        if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
            this.element.setStyle({zoom: 1});
        var options = Object.extend({
            from: this.element.getOpacity() || 0.0,
            to:   1.0
        }, arguments[1] || { });
        this.start(options);
    },
    update: function(position)
    {
        this.element.setOpacity(position);
    }
});

Effect.Move = Class.create(Effect.Base, {
    initialize: function(element)
    {
        this.element = $(element);
        if (!this.element) throw(Effect._elementDoesNotExistError);
        var options = Object.extend({
            x:    0,
            y:    0,
            mode: 'relative'
        }, arguments[1] || { });
        this.start(options);
    },
    setup: function()
    {
        this.element.makePositioned();
        this.originalLeft = parseFloat(this.element.getStyle('left') || '0');
        this.originalTop = parseFloat(this.element.getStyle('top') || '0');
        if (this.options.mode == 'absolute')
        {
            this.options.x = this.options.x - this.originalLeft;
            this.options.y = this.options.y - this.originalTop;
        }
    },
    update: function(position)
    {
        this.element.setStyle({
            left: (this.options.x * position + this.originalLeft).round() + 'px',
            top:  (this.options.y * position + this.originalTop).round() + 'px'
        });
    }
});

// for backwards compatibility
Effect.MoveBy = function(element, toTop, toLeft)
{
    return new Effect.Move(element,
            Object.extend({ x: toLeft, y: toTop }, arguments[3] || { }));
};

Effect.Scale = Class.create(Effect.Base, {
    initialize: function(element, percent)
    {
        this.element = $(element);
        if (!this.element) throw(Effect._elementDoesNotExistError);
        var options = Object.extend({
            scaleX: true,
            scaleY: true,
            scaleContent: true,
            scaleFromCenter: false,
            scaleMode: 'box',        // 'box' or 'contents' or { } with provided values
            scaleFrom: 100.0,
            scaleTo:   percent
        }, arguments[2] || { });
        this.start(options);
    },
    setup: function()
    {
        this.restoreAfterFinish = this.options.restoreAfterFinish || false;
        this.elementPositioning = this.element.getStyle('position');

        this.originalStyle = { };
        ['top','left','width','height','fontSize'].each(function(k)
        {
            this.originalStyle[k] = this.element.style[k];
        }.bind(this));

        this.originalTop = this.element.offsetTop;
        this.originalLeft = this.element.offsetLeft;

        var fontSize = this.element.getStyle('font-size') || '100%';
        ['em','px','%','pt'].each(function(fontSizeType)
        {
            if (fontSize.indexOf(fontSizeType) > 0)
            {
                this.fontSize = parseFloat(fontSize);
                this.fontSizeType = fontSizeType;
            }
        }.bind(this));

        this.factor = (this.options.scaleTo - this.options.scaleFrom) / 100;

        this.dims = null;
        if (this.options.scaleMode == 'box')
            this.dims = [this.element.offsetHeight, this.element.offsetWidth];
        if (/^content/.test(this.options.scaleMode))
            this.dims = [this.element.scrollHeight, this.element.scrollWidth];
        if (!this.dims)
            this.dims = [this.options.scaleMode.originalHeight,
                    this.options.scaleMode.originalWidth];
    },
    update: function(position)
    {
        var currentScale = (this.options.scaleFrom / 100.0) + (this.factor * position);
        if (this.options.scaleContent && this.fontSize)
            this.element.setStyle({fontSize: this.fontSize * currentScale + this.fontSizeType });
        this.setDimensions(this.dims[0] * currentScale, this.dims[1] * currentScale);
    },
    finish: function(position)
    {
        if (this.restoreAfterFinish) this.element.setStyle(this.originalStyle);
    },
    setDimensions: function(height, width)
    {
        var d = { };
        if (this.options.scaleX) d.width = width.round() + 'px';
        if (this.options.scaleY) d.height = height.round() + 'px';
        if (this.options.scaleFromCenter)
        {
            var topd = (height - this.dims[0]) / 2;
            var leftd = (width - this.dims[1]) / 2;
            if (this.elementPositioning == 'absolute')
            {
                if (this.options.scaleY) d.top = this.originalTop - topd + 'px';
                if (this.options.scaleX) d.left = this.originalLeft - leftd + 'px';
            }
            else
            {
                if (this.options.scaleY) d.top = -topd + 'px';
                if (this.options.scaleX) d.left = -leftd + 'px';
            }
        }
        this.element.setStyle(d);
    }
});

Effect.Highlight = Class.create(Effect.Base, {
    initialize: function(element)
    {
        this.element = $(element);
        if (!this.element) throw(Effect._elementDoesNotExistError);
        var options = Object.extend({ startcolor: '#ffff99' }, arguments[1] || { });
        this.start(options);
    },
    setup: function()
    {
        // Prevent executing on elements not in the layout flow
        if (this.element.getStyle('display') == 'none')
        {
            this.cancel();
            return;
        }
    // Disable background image during the effect
        this.oldStyle = { };
        if (!this.options.keepBackgroundImage)
        {
            this.oldStyle.backgroundImage = this.element.getStyle('background-image');
            this.element.setStyle({backgroundImage: 'none'});
        }
        if (!this.options.endcolor)
            this.options.endcolor = this.element.getStyle('background-color').parseColor('#ffffff');
        if (!this.options.restorecolor)
            this.options.restorecolor = this.element.getStyle('background-color');
    // init color calculations
        this._base = $R(0, 2).map(function(i)
        {
            return parseInt(this.options.startcolor.slice(i * 2 + 1, i * 2 + 3), 16)
        }.bind(this));
        this._delta = $R(0, 2).map(function(i)
        {
            return parseInt(this.options.endcolor.slice(i * 2 + 1, i * 2 + 3), 16) - this._base[i]
        }.bind(this));
    },
    update: function(position)
    {
        this.element.setStyle({backgroundColor: $R(0, 2).inject('#', function(m, v, i)
        {
            return m + ((this._base[i] + (this._delta[i] * position)).round().toColorPart());
        }.bind(this)) });
    },
    finish: function()
    {
        this.element.setStyle(Object.extend(this.oldStyle, {
            backgroundColor: this.options.restorecolor
        }));
    }
});

Effect.ScrollTo = function(element)
{
    var options = arguments[1] || { },
            scrollOffsets = document.viewport.getScrollOffsets(),
            elementOffsets = $(element).cumulativeOffset(),
            max = (window.height || document.body.scrollHeight) - document.viewport.getHeight();

    if (options.offset) elementOffsets[1] += options.offset;

    return new Effect.Tween(null,
            scrollOffsets.top,
            elementOffsets[1] > max ? max : elementOffsets[1],
            options,
            function(p)
            {
                scrollTo(scrollOffsets.left, p.round())
            }
            );
};

/* ------------- combination effects ------------- */

Effect.Fade = function(element)
{
    element = $(element);
    var oldOpacity = element.getInlineOpacity();
    var options = Object.extend({
        from: element.getOpacity() || 1.0,
        to:   0.0,
        afterFinishInternal: function(effect)
        {
            if (effect.options.to != 0) return;
            effect.element.hide().setStyle({opacity: oldOpacity});
        }
    }, arguments[1] || { });
    return new Effect.Opacity(element, options);
};

Effect.Appear = function(element)
{
    element = $(element);
    var options = Object.extend({
        from: (element.getStyle('display') == 'none' ? 0.0 : element.getOpacity() || 0.0),
        to:   1.0,
    // force Safari to render floated elements properly
        afterFinishInternal: function(effect)
        {
            effect.element.forceRerendering();
        },
        beforeSetup: function(effect)
        {
            effect.element.setOpacity(effect.options.from).show();
        }}, arguments[1] || { });
    return new Effect.Opacity(element, options);
};

Effect.Puff = function(element)
{
    element = $(element);
    var oldStyle = {
        opacity: element.getInlineOpacity(),
        position: element.getStyle('position'),
        top:  element.style.top,
        left: element.style.left,
        width: element.style.width,
        height: element.style.height
    };
    return new Effect.Parallel(
            [ new Effect.Scale(element, 200,
            { sync: true, scaleFromCenter: true, scaleContent: true, restoreAfterFinish: true }),
                    new Effect.Opacity(element, { sync: true, to: 0.0 }) ],
            Object.extend({ duration: 1.0,
                beforeSetupInternal: function(effect)
                {
                    Position.absolutize(effect.effects[0].element)
                },
                afterFinishInternal: function(effect)
                {
                    effect.effects[0].element.hide().setStyle(oldStyle);
                }
            }, arguments[1] || { })
            );
};

Effect.BlindUp = function(element)
{
    element = $(element);
    element.makeClipping();
    return new Effect.Scale(element, 0,
            Object.extend({ scaleContent: false,
                scaleX: false,
                restoreAfterFinish: true,
                afterFinishInternal: function(effect)
                {
                    effect.element.hide().undoClipping();
                }
            }, arguments[1] || { })
            );
};

Effect.BlindDown = function(element)
{
    element = $(element);
    var elementDimensions = element.getDimensions();
    return new Effect.Scale(element, 100, Object.extend({
        scaleContent: false,
        scaleX: false,
        scaleFrom: 0,
        scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
        restoreAfterFinish: true,
        afterSetup: function(effect)
        {
            effect.element.makeClipping().setStyle({height: '0px'}).show();
        },
        afterFinishInternal: function(effect)
        {
            effect.element.undoClipping();
        }
    }, arguments[1] || { }));
};

Effect.SwitchOff = function(element)
{
    element = $(element);
    var oldOpacity = element.getInlineOpacity();
    return new Effect.Appear(element, Object.extend({
        duration: 0.4,
        from: 0,
        transition: Effect.Transitions.flicker,
        afterFinishInternal: function(effect)
        {
            new Effect.Scale(effect.element, 1, {
                duration: 0.3, scaleFromCenter: true,
                scaleX: false, scaleContent: false, restoreAfterFinish: true,
                beforeSetup: function(effect)
                {
                    effect.element.makePositioned().makeClipping();
                },
                afterFinishInternal: function(effect)
                {
                    effect.element.hide().undoClipping().undoPositioned().setStyle({opacity: oldOpacity});
                }
            })
        }
    }, arguments[1] || { }));
};

Effect.DropOut = function(element)
{
    element = $(element);
    var oldStyle = {
        top: element.getStyle('top'),
        left: element.getStyle('left'),
        opacity: element.getInlineOpacity() };
    return new Effect.Parallel(
            [ new Effect.Move(element, {x: 0, y: 100, sync: true }),
                    new Effect.Opacity(element, { sync: true, to: 0.0 }) ],
            Object.extend(
            { duration: 0.5,
                beforeSetup: function(effect)
                {
                    effect.effects[0].element.makePositioned();
                },
                afterFinishInternal: function(effect)
                {
                    effect.effects[0].element.hide().undoPositioned().setStyle(oldStyle);
                }
            }, arguments[1] || { }));
};

Effect.Shake = function(element)
{
    element = $(element);
    var options = Object.extend({
        distance: 20,
        duration: 0.5
    }, arguments[1] || {});
    var distance = parseFloat(options.distance);
    var split = parseFloat(options.duration) / 10.0;
    var oldStyle = {
        top: element.getStyle('top'),
        left: element.getStyle('left') };
    return new Effect.Move(element,
    { x:  distance, y: 0, duration: split, afterFinishInternal: function(effect)
    {
        new Effect.Move(effect.element,
        { x: -distance * 2, y: 0, duration: split * 2,  afterFinishInternal: function(effect)
        {
            new Effect.Move(effect.element,
            { x:  distance * 2, y: 0, duration: split * 2,  afterFinishInternal: function(effect)
            {
                new Effect.Move(effect.element,
                { x: -distance * 2, y: 0, duration: split * 2,  afterFinishInternal: function(effect)
                {
                    new Effect.Move(effect.element,
                    { x:  distance * 2, y: 0, duration: split * 2,  afterFinishInternal: function(effect)
                    {
                        new Effect.Move(effect.element,
                        { x: -distance, y: 0, duration: split, afterFinishInternal: function(effect)
                        {
                            effect.element.undoPositioned().setStyle(oldStyle);
                        }})
                    }})
                }})
            }})
        }})
    }});
};

Effect.SlideDown = function(element)
{
    element = $(element).cleanWhitespace();
  // SlideDown need to have the content of the element wrapped in a container element with fixed height!
    var oldInnerBottom = element.down().getStyle('bottom');
    var elementDimensions = element.getDimensions();
    return new Effect.Scale(element, 100, Object.extend({
        scaleContent: false,
        scaleX: false,
        scaleFrom: window.opera ? 0 : 1,
        scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
        restoreAfterFinish: true,
        afterSetup: function(effect)
        {
            effect.element.makePositioned();
            effect.element.down().makePositioned();
            if (window.opera) effect.element.setStyle({top: ''});
            effect.element.makeClipping().setStyle({height: '0px'}).show();
        },
        afterUpdateInternal: function(effect)
        {
            effect.element.down().setStyle({bottom:
                    (effect.dims[0] - effect.element.clientHeight) + 'px' });
        },
        afterFinishInternal: function(effect)
        {
            effect.element.undoClipping().undoPositioned();
            effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom});
        }
    }, arguments[1] || { })
            );
};

Effect.SlideUp = function(element)
{
    element = $(element).cleanWhitespace();
    var oldInnerBottom = element.down().getStyle('bottom');
    var elementDimensions = element.getDimensions();
    return new Effect.Scale(element, window.opera ? 0 : 1,
            Object.extend({ scaleContent: false,
                scaleX: false,
                scaleMode: 'box',
                scaleFrom: 100,
                scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
                restoreAfterFinish: true,
                afterSetup: function(effect)
                {
                    effect.element.makePositioned();
                    effect.element.down().makePositioned();
                    if (window.opera) effect.element.setStyle({top: ''});
                    effect.element.makeClipping().show();
                },
                afterUpdateInternal: function(effect)
                {
                    effect.element.down().setStyle({bottom:
                            (effect.dims[0] - effect.element.clientHeight) + 'px' });
                },
                afterFinishInternal: function(effect)
                {
                    effect.element.hide().undoClipping().undoPositioned();
                    effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom});
                }
            }, arguments[1] || { })
            );
};

// Bug in opera makes the TD containing this element expand for a instance after finish 
Effect.Squish = function(element)
{
    return new Effect.Scale(element, window.opera ? 1 : 0, {
        restoreAfterFinish: true,
        beforeSetup: function(effect)
        {
            effect.element.makeClipping();
        },
        afterFinishInternal: function(effect)
        {
            effect.element.hide().undoClipping();
        }
    });
};

Effect.Grow = function(element)
{
    element = $(element);
    var options = Object.extend({
        direction: 'center',
        moveTransition: Effect.Transitions.sinoidal,
        scaleTransition: Effect.Transitions.sinoidal,
        opacityTransition: Effect.Transitions.full
    }, arguments[1] || { });
    var oldStyle = {
        top: element.style.top,
        left: element.style.left,
        height: element.style.height,
        width: element.style.width,
        opacity: element.getInlineOpacity() };

    var dims = element.getDimensions();
    var initialMoveX, initialMoveY;
    var moveX, moveY;

    switch (options.direction)
            {
        case 'top-left':
            initialMoveX = initialMoveY = moveX = moveY = 0;
            break;
        case 'top-right':
            initialMoveX = dims.width;
            initialMoveY = moveY = 0;
            moveX = -dims.width;
            break;
        case 'bottom-left':
            initialMoveX = moveX = 0;
            initialMoveY = dims.height;
            moveY = -dims.height;
            break;
        case 'bottom-right':
            initialMoveX = dims.width;
            initialMoveY = dims.height;
            moveX = -dims.width;
            moveY = -dims.height;
            break;
        case 'center':
            initialMoveX = dims.width / 2;
            initialMoveY = dims.height / 2;
            moveX = -dims.width / 2;
            moveY = -dims.height / 2;
            break;
    }

    return new Effect.Move(element, {
        x: initialMoveX,
        y: initialMoveY,
        duration: 0.01,
        beforeSetup: function(effect)
        {
            effect.element.hide().makeClipping().makePositioned();
        },
        afterFinishInternal: function(effect)
        {
            new Effect.Parallel(
                    [ new Effect.Opacity(effect.element, { sync: true, to: 1.0, from: 0.0, transition: options.opacityTransition }),
                            new Effect.Move(effect.element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition }),
                            new Effect.Scale(effect.element, 100, {
                                scaleMode: { originalHeight: dims.height, originalWidth: dims.width },
                                sync: true, scaleFrom: window.opera ? 1 : 0, transition: options.scaleTransition, restoreAfterFinish: true})
                            ], Object.extend({
                beforeSetup: function(effect)
                {
                    effect.effects[0].element.setStyle({height: '0px'}).show();
                },
                afterFinishInternal: function(effect)
                {
                    effect.effects[0].element.undoClipping().undoPositioned().setStyle(oldStyle);
                }
            }, options)
                    )
        }
    });
};

Effect.Shrink = function(element)
{
    element = $(element);
    var options = Object.extend({
        direction: 'center',
        moveTransition: Effect.Transitions.sinoidal,
        scaleTransition: Effect.Transitions.sinoidal,
        opacityTransition: Effect.Transitions.none
    }, arguments[1] || { });
    var oldStyle = {
        top: element.style.top,
        left: element.style.left,
        height: element.style.height,
        width: element.style.width,
        opacity: element.getInlineOpacity() };

    var dims = element.getDimensions();
    var moveX, moveY;

    switch (options.direction)
            {
        case 'top-left':
            moveX = moveY = 0;
            break;
        case 'top-right':
            moveX = dims.width;
            moveY = 0;
            break;
        case 'bottom-left':
            moveX = 0;
            moveY = dims.height;
            break;
        case 'bottom-right':
            moveX = dims.width;
            moveY = dims.height;
            break;
        case 'center':
            moveX = dims.width / 2;
            moveY = dims.height / 2;
            break;
    }

    return new Effect.Parallel(
            [ new Effect.Opacity(element, { sync: true, to: 0.0, from: 1.0, transition: options.opacityTransition }),
                    new Effect.Scale(element, window.opera ? 1 : 0, { sync: true, transition: options.scaleTransition, restoreAfterFinish: true}),
                    new Effect.Move(element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition })
                    ], Object.extend({
        beforeStartInternal: function(effect)
        {
            effect.effects[0].element.makePositioned().makeClipping();
        },
        afterFinishInternal: function(effect)
        {
            effect.effects[0].element.hide().undoClipping().undoPositioned().setStyle(oldStyle);
        }
    }, options)
            );
};

Effect.Pulsate = function(element)
{
    element = $(element);
    var options = arguments[1] || { };
    var oldOpacity = element.getInlineOpacity();
    var transition = options.transition || Effect.Transitions.sinoidal;
    var reverser = function(pos)
    {
        return transition(1 - Effect.Transitions.pulse(pos, options.pulses))
    };
    reverser.bind(transition);
    return new Effect.Opacity(element,
            Object.extend(Object.extend({  duration: 2.0, from: 0,
                afterFinishInternal: function(effect)
                {
                    effect.element.setStyle({opacity: oldOpacity});
                }
            }, options), {transition: reverser}));
};

Effect.Fold = function(element)
{
    element = $(element);
    var oldStyle = {
        top: element.style.top,
        left: element.style.left,
        width: element.style.width,
        height: element.style.height };
    element.makeClipping();
    return new Effect.Scale(element, 5, Object.extend({
        scaleContent: false,
        scaleX: false,
        afterFinishInternal: function(effect)
        {
            new Effect.Scale(element, 1, {
                scaleContent: false,
                scaleY: false,
                afterFinishInternal: function(effect)
                {
                    effect.element.hide().undoClipping().setStyle(oldStyle);
                } });
        }}, arguments[1] || { }));
};

Effect.Morph = Class.create(Effect.Base, {
    initialize: function(element)
    {
        this.element = $(element);
        if (!this.element) throw(Effect._elementDoesNotExistError);
        var options = Object.extend({
            style: { }
        }, arguments[1] || { });

        if (!Object.isString(options.style)) this.style = $H(options.style);
        else
        {
            if (options.style.include(':'))
                this.style = options.style.parseStyle();
            else
            {
                this.element.addClassName(options.style);
                this.style = $H(this.element.getStyles());
                this.element.removeClassName(options.style);
                var css = this.element.getStyles();
                this.style = this.style.reject(function(style)
                {
                    return style.value == css[style.key];
                });
                options.afterFinishInternal = function(effect)
                {
                    effect.element.addClassName(effect.options.style);
                    effect.transforms.each(function(transform)
                    {
                        effect.element.style[transform.style] = '';
                    });
                }
            }
        }
        this.start(options);
    },

    setup: function()
    {
        function parseColor(color)
        {
            if (!color || ['rgba(0, 0, 0, 0)','transparent'].include(color)) color = '#ffffff';
            color = color.parseColor();
            return $R(0, 2).map(function(i)
            {
                return parseInt(color.slice(i * 2 + 1, i * 2 + 3), 16)
            });
        }
        this.transforms = this.style.map(function(pair)
        {
            var property = pair[0], value = pair[1], unit = null;

            if (value.parseColor('#zzzzzz') != '#zzzzzz')
            {
                value = value.parseColor();
                unit = 'color';
            }
            else if (property == 'opacity')
            {
                value = parseFloat(value);
                if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
                    this.element.setStyle({zoom: 1});
            }
            else if (Element.CSS_LENGTH.test(value))
            {
                var components = value.match(/^([\+\-]?[0-9\.]+)(.*)$/);
                value = parseFloat(components[1]);
                unit = (components.length == 3) ? components[2] : null;
            }

            var originalValue = this.element.getStyle(property);
            return {
                style: property.camelize(),
                originalValue: unit == 'color' ? parseColor(originalValue) : parseFloat(originalValue || 0),
                targetValue: unit == 'color' ? parseColor(value) : value,
                unit: unit
            };
        }.bind(this)).reject(function(transform)
        {
            return (
                    (transform.originalValue == transform.targetValue) ||
                    (
                            transform.unit != 'color' &&
                            (isNaN(transform.originalValue) || isNaN(transform.targetValue))
                            )
                    )
        });
    },
    update: function(position)
    {
        var style = { }, transform, i = this.transforms.length;
        while (i--)
            style[(transform = this.transforms[i]).style] =
            transform.unit == 'color' ? '#' +
                                        (Math.round(transform.originalValue[0] +
                                                    (transform.targetValue[0] - transform.originalValue[0]) * position)).toColorPart() +
                                        (Math.round(transform.originalValue[1] +
                                                    (transform.targetValue[1] - transform.originalValue[1]) * position)).toColorPart() +
                                        (Math.round(transform.originalValue[2] +
                                                    (transform.targetValue[2] - transform.originalValue[2]) * position)).toColorPart() :
            (transform.originalValue +
             (transform.targetValue - transform.originalValue) * position).toFixed(3) +
            (transform.unit === null ? '' : transform.unit);
        this.element.setStyle(style, true);
    }
});

Effect.Transform = Class.create({
    initialize: function(tracks)
    {
        this.tracks = [];
        this.options = arguments[1] || { };
        this.addTracks(tracks);
    },
    addTracks: function(tracks)
    {
        tracks.each(function(track)
        {
            track = $H(track);
            var data = track.values().first();
            this.tracks.push($H({
                ids:     track.keys().first(),
                effect:  Effect.Morph,
                options: { style: data }
            }));
        }.bind(this));
        return this;
    },
    play: function()
    {
        return new Effect.Parallel(
                this.tracks.map(function(track)
                {
                    var ids = track.get('ids'), effect = track.get('effect'), options = track.get('options');
                    var elements = [$(ids) || $$(ids)].flatten();
                    return elements.map(function(e)
                    {
                        return new effect(e, Object.extend({ sync:true }, options))
                    });
                }).flatten(),
                this.options
                );
    }
});

Element.CSS_PROPERTIES = $w(
        'backgroundColor backgroundPosition borderBottomColor borderBottomStyle ' +
        'borderBottomWidth borderLeftColor borderLeftStyle borderLeftWidth ' +
        'borderRightColor borderRightStyle borderRightWidth borderSpacing ' +
        'borderTopColor borderTopStyle borderTopWidth bottom clip color ' +
        'fontSize fontWeight height left letterSpacing lineHeight ' +
        'marginBottom marginLeft marginRight marginTop markerOffset maxHeight ' +
        'maxWidth minHeight minWidth opacity outlineColor outlineOffset ' +
        'outlineWidth paddingBottom paddingLeft paddingRight paddingTop ' +
        'right textIndent top width wordSpacing zIndex');

Element.CSS_LENGTH = /^(([\+\-]?[0-9\.]+)(em|ex|px|in|cm|mm|pt|pc|\%))|0$/;

String.__parseStyleElement = document.createElement('div');
String.prototype.parseStyle = function()
{
    var style, styleRules = $H();
    if (Prototype.Browser.WebKit)
        style = new Element('div', {style:this}).style;
    else
    {
        String.__parseStyleElement.innerHTML = '<div style="' + this + '"></div>';
        style = String.__parseStyleElement.childNodes[0].style;
    }

    Element.CSS_PROPERTIES.each(function(property)
    {
        if (style[property]) styleRules.set(property, style[property]);
    });

    if (Prototype.Browser.IE && this.include('opacity'))
        styleRules.set('opacity', this.match(/opacity:\s*((?:0|1)?(?:\.\d*)?)/)[1]);

    return styleRules;
};

if (document.defaultView && document.defaultView.getComputedStyle)
{
    Element.getStyles = function(element)
    {
        var css = document.defaultView.getComputedStyle($(element), null);
        return Element.CSS_PROPERTIES.inject({ }, function(styles, property)
        {
            styles[property] = css[property];
            return styles;
        });
    };
}
else
{
    Element.getStyles = function(element)
    {
        element = $(element);
        var css = element.currentStyle, styles;
        styles = Element.CSS_PROPERTIES.inject({ }, function(hash, property)
        {
            hash.set(property, css[property]);
            return hash;
        });
        if (!styles.opacity) styles.set('opacity', element.getOpacity());
        return styles;
    };
}
;

Effect.Methods = {
    morph: function(element, style)
    {
        element = $(element);
        new Effect.Morph(element, Object.extend({ style: style }, arguments[2] || { }));
        return element;
    },
    visualEffect: function(element, effect, options)
    {
        element = $(element)
        var s = effect.dasherize().camelize(), klass = s.charAt(0).toUpperCase() + s.substring(1);
        new Effect[klass](element, options);
        return element;
    },
    highlight: function(element, options)
    {
        element = $(element);
        new Effect.Highlight(element, options);
        return element;
    }
};

$w('fade appear grow shrink fold blindUp blindDown slideUp slideDown ' +
   'pulsate shake puff squish switchOff dropOut').each(
        function(effect)
        {
            Effect.Methods[effect] = function(element, options)
            {
                element = $(element);
                Effect[effect.charAt(0).toUpperCase() + effect.substring(1)](element, options);
                return element;
            }
        }
        );

$w('getInlineOpacity forceRerendering setContentZoom collectTextNodes collectTextNodesIgnoreClass getStyles').each(
        function(f)
        {
            Effect.Methods[f] = Element[f];
        }
        );

Element.addMethods(Effect.Methods);