// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
// Contributors:
//  Justin Palmer (http://encytemedia.com/)
//  Mark Pilgrim (http://diveintomark.org/)
//  Martin Bialasinki
// 
// See scriptaculous.js for full license.  

// 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(element, {fontSize: (percent / 100) + 'em'});
    if (navigator.appVersion.indexOf('AppleWebKit') > 0) window.scrollBy(0, 0);
}

Element.getOpacity = function(element) {
    var opacity;
    if (opacity = Element.getStyle(element, 'opacity'))
        return parseFloat(opacity);
    if (opacity = (Element.getStyle(element, 'filter') || '').match(/alpha\(opacity=(.*)\)/))
        if (opacity[1]) return parseFloat(opacity[1]) / 100;
    return 1.0;
}

Element.setOpacity = function(element, value) {
    element = $(element);
    if (value == 1) {
        Element.setStyle(element, { opacity:
                (/Gecko/.test(navigator.userAgent) && !/Konqueror|Safari|KHTML/.test(navigator.userAgent)) ?
                0.999999 : null });
        if (/MSIE/.test(navigator.userAgent))
            Element.setStyle(element, {filter: Element.getStyle(element, 'filter').replace(/alpha\([^\)]*\)/gi, '')});
    } else {
        if (value < 0.00001) value = 0;
        Element.setStyle(element, {opacity: value});
        if (/MSIE/.test(navigator.userAgent))
            Element.setStyle(element,
            { filter: Element.getStyle(element, 'filter').replace(/alpha\([^\)]*\)/gi, '') +
                      'alpha(opacity=' + value * 100 + ')' });
    }
}

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

Element.childrenWithClassName = function(element, className, findFirst) {
    return [$A($(element).getElementsByTagName('*'))[findFirst ? 'detect' : 'select'](function(c) {
        return c.className ? Element.hasClassName(c, className) : false;
    })].flatten();
}

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

['setOpacity','getOpacity','getInlineOpacity','forceRerendering','setContentZoom',
        'collectTextNodes','collectTextNodesIgnoreClass','childrenWithClassName'].each(
        function(f) {
            Element.Methods[f] = Element[f];
        }
        );

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

Array.prototype.call = function() {
    var args = arguments;
    this.each(function(f) {
        f.apply(this, args)
    });
}

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

var Effect = {
    tagifyText: function(element) {
        var tagifyStyle = 'position:relative';
        if (/MSIE/.test(navigator.userAgent)) tagifyStyle += ';zoom:1';
        element = $(element);
        $A(element.childNodes).each(function(child) {
            if (child.nodeType == 3) {
                child.nodeValue.toArray().each(function(character) {
                    element.insertBefore(
                            Builder.node('span', {style: tagifyStyle},
                                    character == ' ' ? String.fromCharCode(160) : character),
                            child);
                });
                Element.remove(child);
            }
        });
    },
    multiple: function(element, effect) {
        var elements;
        if (((typeof element == 'object') ||
             (typeof element == 'function')) &&
            (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);
    }
};

var Effect2 = Effect;
// deprecated

/* ------------- transitions ------------- */

Effect.Transitions = {}

Effect.Transitions.linear = function(pos) {
    return pos;
}
Effect.Transitions.sinoidal = function(pos) {
    return (-Math.cos(pos * Math.PI) / 2) + 0.5;
}
Effect.Transitions.reverse = function(pos) {
    return 1 - pos;
}
Effect.Transitions.flicker = function(pos) {
    return ((-Math.cos(pos * Math.PI) / 4) + 0.75) + Math.random() / 4;
}
Effect.Transitions.wobble = function(pos) {
    return (-Math.cos(pos * Math.PI * (9 * pos)) / 2) + 0.5;
}
Effect.Transitions.pulse = function(pos) {
    return (Math.floor(pos * 10) % 2 == 0 ?
            (pos * 10 - Math.floor(pos * 10)) : 1 - (pos * 10 - Math.floor(pos * 10)));
}
Effect.Transitions.none = function(pos) {
    return 0;
}
Effect.Transitions.full = function(pos) {
    return 1;
}

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

Effect.ScopedQueue = Class.create();
Object.extend(Object.extend(Effect.ScopedQueue.prototype, 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 = (typeof effect.options.queue == 'string') ?
                       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 '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), 40);
    },
    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();
        this.effects.invoke('loop', timePos);
    }
});

Effect.Queues = {
    instances: $H(),
    get: function(queueName) {
        if (typeof queueName != 'string') return queueName;

        if (!this.instances[queueName])
            this.instances[queueName] = new Effect.ScopedQueue();

        return this.instances[queueName];
    }
}
Effect.Queue = Effect.Queues.get('global');

Effect.DefaultOptions = {
    transition: Effect.Transitions.sinoidal,
    duration:   1.0,   // seconds
    fps:        25.0,  // max. 25fps due to Effect.Queue implementation
    sync:       false, // true for combining
    from:       0.0,
    to:         1.0,
    delay:      0.0,
    queue:      'parallel'
}

Effect.Base = function() {
};
Effect.Base.prototype = {
    position: null,
    start: function(options) {
        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.event('beforeStart');
        if (!this.options.sync)
            Effect.Queues.get(typeof this.options.queue == 'string' ?
                              '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.finishOn - this.startOn);
            var frame = Math.round(pos * this.options.fps * this.options.duration);
            if (frame > this.currentFrame) {
                this.render(pos);
                this.currentFrame = frame;
            }
        }
    },
    render: function(pos) {
        if (this.state == 'idle') {
            this.state = 'running';
            this.event('beforeSetup');
            if (this.setup) this.setup();
            this.event('afterSetup');
        }
        if (this.state == 'running') {
            if (this.options.transition) pos = this.options.transition(pos);
            pos *= (this.options.to - this.options.from);
            pos += this.options.from;
            this.position = pos;
            this.event('beforeUpdate');
            if (this.update) this.update(pos);
            this.event('afterUpdate');
        }
    },
    cancel: function() {
        if (!this.options.sync)
            Effect.Queues.get(typeof this.options.queue == 'string' ?
                              '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() {
        return '#<Effect:' + $H(this).inspect() + ',options:' + $H(this.options).inspect() + '>';
    }
}

Effect.Parallel = Class.create();
Object.extend(Object.extend(Effect.Parallel.prototype, Effect.Base.prototype), {
    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.Opacity = Class.create();
Object.extend(Object.extend(Effect.Opacity.prototype, Effect.Base.prototype), {
    initialize: function(element) {
        this.element = $(element);
        // make this work on IE on elements without 'layout'
        if (/MSIE/.test(navigator.userAgent) && (!this.element.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();
Object.extend(Object.extend(Effect.Move.prototype, Effect.Base.prototype), {
    initialize: function(element) {
        this.element = $(element);
        var options = Object.extend({
            x:    0,
            y:    0,
            mode: 'relative'
        }, arguments[1] || {});
        this.start(options);
    },
    setup: function() {
        // Bug in Opera: Opera returns the "real" position of a static element or
        // relative element that does not have top/left explicitly set.
        // ==> Always set top and left for position relative elements in your stylesheets
        // (to 0 if you do not need them)
        this.element.makePositioned();
        this.originalLeft = parseFloat(this.element.getStyle('left') || '0');
        this.originalTop = parseFloat(this.element.getStyle('top') || '0');
        if (this.options.mode == 'absolute') {
            // absolute movement, so we need to calc deltaX and deltaY
            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 + 'px',
            top:  this.options.y * position + this.originalTop + '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();
Object.extend(Object.extend(Effect.Scale.prototype, Effect.Base.prototype), {
    initialize: function(element, percent) {
        this.element = $(element)
        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','%'].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 + 'px';
        if (this.options.scaleY) d.height = height + '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();
Object.extend(Object.extend(Effect.Highlight.prototype, Effect.Base.prototype), {
    initialize: function(element) {
        this.element = $(element);
        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 = {
            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 + (Math.round(this._base[i] + (this._delta[i] * position)).toColorPart());
        }.bind(this)) });
    },
    finish: function() {
        this.element.setStyle(Object.extend(this.oldStyle, {
            backgroundColor: this.options.restorecolor
        }));
    }
});

Effect.ScrollTo = Class.create();
Object.extend(Object.extend(Effect.ScrollTo.prototype, Effect.Base.prototype), {
    initialize: function(element) {
        this.element = $(element);
        this.start(arguments[1] || {});
    },
    setup: function() {
        Position.prepare();
        var offsets = Position.cumulativeOffset(this.element);
        if (this.options.offset) offsets[1] += this.options.offset;
        var max = window.innerHeight ?
                  window.height - window.innerHeight :
                  document.body.scrollHeight -
                  (document.documentElement.clientHeight ?
                   document.documentElement.clientHeight : document.body.clientHeight);
        this.scrollStart = Position.deltaY;
        this.delta = (offsets[1] > max ? max : offsets[1]) - this.scrollStart;
    },
    update: function(position) {
        Position.prepare();
        window.scrollTo(Position.deltaX,
                this.scrollStart + (position * this.delta));
    }
});

/* ------------- 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();
            effect.element.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);
            effect.element.show();
        }}, arguments[1] || {});
    return new Effect.Opacity(element, options);
}

Effect.Puff = function(element) {
    element = $(element);
    var oldStyle = { opacity: element.getInlineOpacity(), position: element.getStyle('position') };
    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) {
                    effect.effects[0].element.setStyle({position: 'absolute'});
                },
                afterFinishInternal: function(effect) {
                    effect.effects[0].element.hide();
                    effect.effects[0].element.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();
                    effect.element.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();
                    effect.element.setStyle({height: '0px'});
                    effect.element.show();
                },
                afterFinishInternal: function(effect) {
                    effect.element.undoClipping();
                }
            }, arguments[1] || {})
            );
}

Effect.SwitchOff = function(element) {
    element = $(element);
    var oldOpacity = element.getInlineOpacity();
    return new Effect.Appear(element, {
        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();
                    effect.element.makeClipping();
                },
                afterFinishInternal: function(effect) {
                    effect.element.hide();
                    effect.element.undoClipping();
                    effect.element.undoPositioned();
                    effect.element.setStyle({opacity: oldOpacity});
                }
            })
        }
    });
}

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();
                    effect.effects[0].element.undoPositioned();
                    effect.effects[0].element.setStyle(oldStyle);
                }
            }, arguments[1] || {}));
}

Effect.Shake = function(element) {
    element = $(element);
    var oldStyle = {
        top: element.getStyle('top'),
        left: element.getStyle('left') };
    return new Effect.Move(element,
    { x:  20, y: 0, duration: 0.05, afterFinishInternal: function(effect) {
        new Effect.Move(effect.element,
        { x: -40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
            new Effect.Move(effect.element,
            { x:  40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
                new Effect.Move(effect.element,
                { x: -40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
                    new Effect.Move(effect.element,
                    { x:  40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
                        new Effect.Move(effect.element,
                        { x: -20, y: 0, duration: 0.05, afterFinishInternal: function(effect) {
                            effect.element.undoPositioned();
                            effect.element.setStyle(oldStyle);
                        }})
                    }})
                }})
            }})
        }})
    }});
}

Effect.SlideDown = function(element) {
    element = $(element);
    element.cleanWhitespace();
    // SlideDown need to have the content of the element wrapped in a container element with fixed height!
    var oldInnerBottom = $(element.firstChild).getStyle('bottom');
    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.makePositioned();
            effect.element.firstChild.makePositioned();
            if (window.opera) effect.element.setStyle({top: ''});
            effect.element.makeClipping();
            effect.element.setStyle({height: '0px'});
            effect.element.show();
        },
        afterUpdateInternal: function(effect) {
            effect.element.firstChild.setStyle({bottom:
                    (effect.dims[0] - effect.element.clientHeight) + 'px' });
        },
        afterFinishInternal: function(effect) {
            effect.element.undoClipping();
            // IE will crash if child is undoPositioned first
            if (/MSIE/.test(navigator.userAgent)) {
                effect.element.undoPositioned();
                effect.element.firstChild.undoPositioned();
            } else {
                effect.element.firstChild.undoPositioned();
                effect.element.undoPositioned();
            }
            effect.element.firstChild.setStyle({bottom: oldInnerBottom});
        }
    }, arguments[1] || {})
            );
}

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

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();
            effect.element.makeClipping();
            effect.element.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'});
                    effect.effects[0].element.show();
                },
                afterFinishInternal: function(effect) {
                    effect.effects[0].element.undoClipping();
                    effect.effects[0].element.undoPositioned();
                    effect.effects[0].element.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();
            effect.effects[0].element.makeClipping();
        },
        afterFinishInternal: function(effect) {
            effect.effects[0].element.hide();
            effect.effects[0].element.undoClipping();
            effect.effects[0].element.undoPositioned();
            effect.effects[0].element.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))
    };
    reverser.bind(transition);
    return new Effect.Opacity(element,
            Object.extend(Object.extend({  duration: 3.0, 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(element);
    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();
                    effect.element.undoClipping();
                    effect.element.setStyle(oldStyle);
                } });
        }}, arguments[1] || {}));
}

Element.Methods.visualEffect = function(element, effect, options) {
    s = effect.gsub(/_/, '-').camelize();
    effect_class = s.charAt(0).toUpperCase() + s.substring(1);
    new Effect[effect_class](element, options);
    return $(element);
};