// script.aculo.us effects.js v1.6.4, Wed Sep 06 11:30:58 CEST 2006

// 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
				: 1.0
		});

		if (/MSIE/.test(navigator.userAgent) && !window.opera)
			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) && !window.opera)
			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)
{
	var classNameRegExp = new RegExp("(^|\\s)" + className + "(\\s|$)");
	var results = $A($(element).getElementsByTagName('*'))[findFirst ? 'detect' : 'select'](function(c)
	{
		return (c.className && c.className.match(classNameRegExp));
	});

	if (!results)
		results = [];
	return results;
}

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

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

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

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

var Effect =
{
	_elementDoesNotExistError:
	{
		name: 'ElementDoesNotExistError',
		message: 'The specified DOM element does not exist, but is required for this effect to operate'
	},
	tagifyText: function(element)
	{
		if (typeof Builder == 'undefined')
			throw("Effect.tagifyText requires including script.aculo.us' builder.js library");

		var tagifyStyle = 'position:relative';

		if (/MSIE/.test(navigator.userAgent) && !window.opera)
			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 = Prototype.K;

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);

		if (!this.element)
			throw(Effect._elementDoesNotExistError);

		// make this work on IE on elements without 'layout'
		if (/MSIE/.test(navigator.userAgent) && !window.opera && (!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();
Object.extend(Object.extend(Effect.Move.prototype, Effect.Base.prototype),
{
	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()
	{
		// 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: Math.round(this.options.x * position + this.originalLeft) + 'px',
			top: Math.round(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);

		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 = Math.round(width) + 'px';

		if (this.options.scaleY)
			d.height = Math.round(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);

		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 =
		{
			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'),
		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();
			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, 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();
					effect.element.makeClipping();
				},
				afterFinishInternal: function(effect)
				{
					effect.element.hide();
					effect.element.undoClipping();
					effect.element.undoPositioned();
					effect.element.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();
			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: window.opera ? 0 : 1,
		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) && !window.opera)
			{
				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, window.opera ? 0 : 1, 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] || {
	}));
};

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

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);
};

Element.addMethods();