michael@0: // script.aculo.us effects.js v1.7.1_beta2, Tue May 15 15:15:45 EDT 2007
michael@0: 
michael@0: // Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
michael@0: // Contributors:
michael@0: //  Justin Palmer (http://encytemedia.com/)
michael@0: //  Mark Pilgrim (http://diveintomark.org/)
michael@0: //  Martin Bialasinki
michael@0: // 
michael@0: // script.aculo.us is freely distributable under the terms of an MIT-style license.
michael@0: // For details, see the script.aculo.us web site: http://script.aculo.us/ 
michael@0: 
michael@0: // converts rgb() and #xxx to #xxxxxx format,  
michael@0: // returns self (or first argument) if not convertable  
michael@0: String.prototype.parseColor = function() {  
michael@0:   var color = '#';
michael@0:   if(this.slice(0,4) == 'rgb(') {  
michael@0:     var cols = this.slice(4,this.length-1).split(',');  
michael@0:     var i=0; do { color += parseInt(cols[i]).toColorPart() } while (++i<3);  
michael@0:   } else {  
michael@0:     if(this.slice(0,1) == '#') {  
michael@0:       if(this.length==4) for(var i=1;i<4;i++) color += (this.charAt(i) + this.charAt(i)).toLowerCase();  
michael@0:       if(this.length==7) color = this.toLowerCase();  
michael@0:     }  
michael@0:   }  
michael@0:   return(color.length==7 ? color : (arguments[0] || this));  
michael@0: }
michael@0: 
michael@0: /*--------------------------------------------------------------------------*/
michael@0: 
michael@0: Element.collectTextNodes = function(element) {  
michael@0:   return $A($(element).childNodes).collect( function(node) {
michael@0:     return (node.nodeType==3 ? node.nodeValue : 
michael@0:       (node.hasChildNodes() ? Element.collectTextNodes(node) : ''));
michael@0:   }).flatten().join('');
michael@0: }
michael@0: 
michael@0: Element.collectTextNodesIgnoreClass = function(element, className) {  
michael@0:   return $A($(element).childNodes).collect( function(node) {
michael@0:     return (node.nodeType==3 ? node.nodeValue : 
michael@0:       ((node.hasChildNodes() && !Element.hasClassName(node,className)) ? 
michael@0:         Element.collectTextNodesIgnoreClass(node, className) : ''));
michael@0:   }).flatten().join('');
michael@0: }
michael@0: 
michael@0: Element.setContentZoom = function(element, percent) {
michael@0:   element = $(element);  
michael@0:   element.setStyle({fontSize: (percent/100) + 'em'});   
michael@0:   if(Prototype.Browser.WebKit) window.scrollBy(0,0);
michael@0:   return element;
michael@0: }
michael@0: 
michael@0: Element.getInlineOpacity = function(element){
michael@0:   return $(element).style.opacity || '';
michael@0: }
michael@0: 
michael@0: Element.forceRerendering = function(element) {
michael@0:   try {
michael@0:     element = $(element);
michael@0:     var n = document.createTextNode(' ');
michael@0:     element.appendChild(n);
michael@0:     element.removeChild(n);
michael@0:   } catch(e) { }
michael@0: };
michael@0: 
michael@0: /*--------------------------------------------------------------------------*/
michael@0: 
michael@0: Array.prototype.call = function() {
michael@0:   var args = arguments;
michael@0:   this.each(function(f){ f.apply(this, args) });
michael@0: }
michael@0: 
michael@0: /*--------------------------------------------------------------------------*/
michael@0: 
michael@0: var Effect = {
michael@0:   _elementDoesNotExistError: {
michael@0:     name: 'ElementDoesNotExistError',
michael@0:     message: 'The specified DOM element does not exist, but is required for this effect to operate'
michael@0:   },
michael@0:   tagifyText: function(element) {
michael@0:     if(typeof Builder == 'undefined')
michael@0:       throw("Effect.tagifyText requires including script.aculo.us' builder.js library");
michael@0:       
michael@0:     var tagifyStyle = 'position:relative';
michael@0:     if(Prototype.Browser.IE) tagifyStyle += ';zoom:1';
michael@0:     
michael@0:     element = $(element);
michael@0:     $A(element.childNodes).each( function(child) {
michael@0:       if(child.nodeType==3) {
michael@0:         child.nodeValue.toArray().each( function(character) {
michael@0:           element.insertBefore(
michael@0:             Builder.node('span',{style: tagifyStyle},
michael@0:               character == ' ' ? String.fromCharCode(160) : character), 
michael@0:               child);
michael@0:         });
michael@0:         Element.remove(child);
michael@0:       }
michael@0:     });
michael@0:   },
michael@0:   multiple: function(element, effect) {
michael@0:     var elements;
michael@0:     if(((typeof element == 'object') || 
michael@0:         (typeof element == 'function')) && 
michael@0:        (element.length))
michael@0:       elements = element;
michael@0:     else
michael@0:       elements = $(element).childNodes;
michael@0:       
michael@0:     var options = Object.extend({
michael@0:       speed: 0.1,
michael@0:       delay: 0.0
michael@0:     }, arguments[2] || {});
michael@0:     var masterDelay = options.delay;
michael@0: 
michael@0:     $A(elements).each( function(element, index) {
michael@0:       new effect(element, Object.extend(options, { delay: index * options.speed + masterDelay }));
michael@0:     });
michael@0:   },
michael@0:   PAIRS: {
michael@0:     'slide':  ['SlideDown','SlideUp'],
michael@0:     'blind':  ['BlindDown','BlindUp'],
michael@0:     'appear': ['Appear','Fade']
michael@0:   },
michael@0:   toggle: function(element, effect) {
michael@0:     element = $(element);
michael@0:     effect = (effect || 'appear').toLowerCase();
michael@0:     var options = Object.extend({
michael@0:       queue: { position:'end', scope:(element.id || 'global'), limit: 1 }
michael@0:     }, arguments[2] || {});
michael@0:     Effect[element.visible() ? 
michael@0:       Effect.PAIRS[effect][1] : Effect.PAIRS[effect][0]](element, options);
michael@0:   }
michael@0: };
michael@0: 
michael@0: var Effect2 = Effect; // deprecated
michael@0: 
michael@0: /* ------------- transitions ------------- */
michael@0: 
michael@0: Effect.Transitions = {
michael@0:   linear: Prototype.K,
michael@0:   sinoidal: function(pos) {
michael@0:     return (-Math.cos(pos*Math.PI)/2) + 0.5;
michael@0:   },
michael@0:   reverse: function(pos) {
michael@0:     return 1-pos;
michael@0:   },
michael@0:   flicker: function(pos) {
michael@0:     var pos = ((-Math.cos(pos*Math.PI)/4) + 0.75) + Math.random()/4;
michael@0:     return (pos > 1 ? 1 : pos);
michael@0:   },
michael@0:   wobble: function(pos) {
michael@0:     return (-Math.cos(pos*Math.PI*(9*pos))/2) + 0.5;
michael@0:   },
michael@0:   pulse: function(pos, pulses) { 
michael@0:     pulses = pulses || 5; 
michael@0:     return (
michael@0:       Math.round((pos % (1/pulses)) * pulses) == 0 ? 
michael@0:             ((pos * pulses * 2) - Math.floor(pos * pulses * 2)) : 
michael@0:         1 - ((pos * pulses * 2) - Math.floor(pos * pulses * 2))
michael@0:       );
michael@0:   },
michael@0:   none: function(pos) {
michael@0:     return 0;
michael@0:   },
michael@0:   full: function(pos) {
michael@0:     return 1;
michael@0:   }
michael@0: };
michael@0: 
michael@0: /* ------------- core effects ------------- */
michael@0: 
michael@0: Effect.ScopedQueue = Class.create();
michael@0: Object.extend(Object.extend(Effect.ScopedQueue.prototype, Enumerable), {
michael@0:   initialize: function() {
michael@0:     this.effects  = [];
michael@0:     this.interval = null;    
michael@0:   },
michael@0:   _each: function(iterator) {
michael@0:     this.effects._each(iterator);
michael@0:   },
michael@0:   add: function(effect) {
michael@0:     var timestamp = new Date().getTime();
michael@0:     
michael@0:     var position = (typeof effect.options.queue == 'string') ? 
michael@0:       effect.options.queue : effect.options.queue.position;
michael@0:     
michael@0:     switch(position) {
michael@0:       case 'front':
michael@0:         // move unstarted effects after this effect  
michael@0:         this.effects.findAll(function(e){ return e.state=='idle' }).each( function(e) {
michael@0:             e.startOn  += effect.finishOn;
michael@0:             e.finishOn += effect.finishOn;
michael@0:           });
michael@0:         break;
michael@0:       case 'with-last':
michael@0:         timestamp = this.effects.pluck('startOn').max() || timestamp;
michael@0:         break;
michael@0:       case 'end':
michael@0:         // start effect after last queued effect has finished
michael@0:         timestamp = this.effects.pluck('finishOn').max() || timestamp;
michael@0:         break;
michael@0:     }
michael@0:     
michael@0:     effect.startOn  += timestamp;
michael@0:     effect.finishOn += timestamp;
michael@0: 
michael@0:     if(!effect.options.queue.limit || (this.effects.length < effect.options.queue.limit))
michael@0:       this.effects.push(effect);
michael@0:     
michael@0:     if(!this.interval)
michael@0:       this.interval = setInterval(this.loop.bind(this), 15);
michael@0:   },
michael@0:   remove: function(effect) {
michael@0:     this.effects = this.effects.reject(function(e) { return e==effect });
michael@0:     if(this.effects.length == 0) {
michael@0:       clearInterval(this.interval);
michael@0:       this.interval = null;
michael@0:     }
michael@0:   },
michael@0:   loop: function() {
michael@0:     var timePos = new Date().getTime();
michael@0:     for(var i=0, len=this.effects.length;i<len;i++) 
michael@0:       this.effects[i] && this.effects[i].loop(timePos);
michael@0:   }
michael@0: });
michael@0: 
michael@0: Effect.Queues = {
michael@0:   instances: $H(),
michael@0:   get: function(queueName) {
michael@0:     if(typeof queueName != 'string') return queueName;
michael@0:     
michael@0:     if(!this.instances[queueName])
michael@0:       this.instances[queueName] = new Effect.ScopedQueue();
michael@0:       
michael@0:     return this.instances[queueName];
michael@0:   }
michael@0: }
michael@0: Effect.Queue = Effect.Queues.get('global');
michael@0: 
michael@0: Effect.DefaultOptions = {
michael@0:   transition: Effect.Transitions.sinoidal,
michael@0:   duration:   1.0,   // seconds
michael@0:   fps:        100,   // 100= assume 66fps max.
michael@0:   sync:       false, // true for combining
michael@0:   from:       0.0,
michael@0:   to:         1.0,
michael@0:   delay:      0.0,
michael@0:   queue:      'parallel'
michael@0: }
michael@0: 
michael@0: Effect.Base = function() {};
michael@0: Effect.Base.prototype = {
michael@0:   position: null,
michael@0:   start: function(options) {
michael@0:     function codeForEvent(options,eventName){
michael@0:       return (
michael@0:         (options[eventName+'Internal'] ? 'this.options.'+eventName+'Internal(this);' : '') +
michael@0:         (options[eventName] ? 'this.options.'+eventName+'(this);' : '')
michael@0:       );
michael@0:     }
michael@0:     if(options.transition === false) options.transition = Effect.Transitions.linear;
michael@0:     this.options      = Object.extend(Object.extend({},Effect.DefaultOptions), options || {});
michael@0:     this.currentFrame = 0;
michael@0:     this.state        = 'idle';
michael@0:     this.startOn      = this.options.delay*1000;
michael@0:     this.finishOn     = this.startOn+(this.options.duration*1000);
michael@0:     this.fromToDelta  = this.options.to-this.options.from;
michael@0:     this.totalTime    = this.finishOn-this.startOn;
michael@0:     this.totalFrames  = this.options.fps*this.options.duration;
michael@0:     
michael@0:     eval('this.render = function(pos){ '+
michael@0:       'if(this.state=="idle"){this.state="running";'+
michael@0:       codeForEvent(options,'beforeSetup')+
michael@0:       (this.setup ? 'this.setup();':'')+ 
michael@0:       codeForEvent(options,'afterSetup')+
michael@0:       '};if(this.state=="running"){'+
michael@0:       'pos=this.options.transition(pos)*'+this.fromToDelta+'+'+this.options.from+';'+
michael@0:       'this.position=pos;'+
michael@0:       codeForEvent(options,'beforeUpdate')+
michael@0:       (this.update ? 'this.update(pos);':'')+
michael@0:       codeForEvent(options,'afterUpdate')+
michael@0:       '}}');
michael@0:     
michael@0:     this.event('beforeStart');
michael@0:     if(!this.options.sync)
michael@0:       Effect.Queues.get(typeof this.options.queue == 'string' ? 
michael@0:         'global' : this.options.queue.scope).add(this);
michael@0:   },
michael@0:   loop: function(timePos) {
michael@0:     if(timePos >= this.startOn) {
michael@0:       if(timePos >= this.finishOn) {
michael@0:         this.render(1.0);
michael@0:         this.cancel();
michael@0:         this.event('beforeFinish');
michael@0:         if(this.finish) this.finish(); 
michael@0:         this.event('afterFinish');
michael@0:         return;  
michael@0:       }
michael@0:       var pos   = (timePos - this.startOn) / this.totalTime,
michael@0:           frame = Math.round(pos * this.totalFrames);
michael@0:       if(frame > this.currentFrame) {
michael@0:         this.render(pos);
michael@0:         this.currentFrame = frame;
michael@0:       }
michael@0:     }
michael@0:   },
michael@0:   cancel: function() {
michael@0:     if(!this.options.sync)
michael@0:       Effect.Queues.get(typeof this.options.queue == 'string' ? 
michael@0:         'global' : this.options.queue.scope).remove(this);
michael@0:     this.state = 'finished';
michael@0:   },
michael@0:   event: function(eventName) {
michael@0:     if(this.options[eventName + 'Internal']) this.options[eventName + 'Internal'](this);
michael@0:     if(this.options[eventName]) this.options[eventName](this);
michael@0:   },
michael@0:   inspect: function() {
michael@0:     var data = $H();
michael@0:     for(property in this)
michael@0:       if(typeof this[property] != 'function') data[property] = this[property];
michael@0:     return '#<Effect:' + data.inspect() + ',options:' + $H(this.options).inspect() + '>';
michael@0:   }
michael@0: }
michael@0: 
michael@0: Effect.Parallel = Class.create();
michael@0: Object.extend(Object.extend(Effect.Parallel.prototype, Effect.Base.prototype), {
michael@0:   initialize: function(effects) {
michael@0:     this.effects = effects || [];
michael@0:     this.start(arguments[1]);
michael@0:   },
michael@0:   update: function(position) {
michael@0:     this.effects.invoke('render', position);
michael@0:   },
michael@0:   finish: function(position) {
michael@0:     this.effects.each( function(effect) {
michael@0:       effect.render(1.0);
michael@0:       effect.cancel();
michael@0:       effect.event('beforeFinish');
michael@0:       if(effect.finish) effect.finish(position);
michael@0:       effect.event('afterFinish');
michael@0:     });
michael@0:   }
michael@0: });
michael@0: 
michael@0: Effect.Event = Class.create();
michael@0: Object.extend(Object.extend(Effect.Event.prototype, Effect.Base.prototype), {
michael@0:   initialize: function() {
michael@0:     var options = Object.extend({
michael@0:       duration: 0
michael@0:     }, arguments[0] || {});
michael@0:     this.start(options);
michael@0:   },
michael@0:   update: Prototype.emptyFunction
michael@0: });
michael@0: 
michael@0: Effect.Opacity = Class.create();
michael@0: Object.extend(Object.extend(Effect.Opacity.prototype, Effect.Base.prototype), {
michael@0:   initialize: function(element) {
michael@0:     this.element = $(element);
michael@0:     if(!this.element) throw(Effect._elementDoesNotExistError);
michael@0:     // make this work on IE on elements without 'layout'
michael@0:     if(Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
michael@0:       this.element.setStyle({zoom: 1});
michael@0:     var options = Object.extend({
michael@0:       from: this.element.getOpacity() || 0.0,
michael@0:       to:   1.0
michael@0:     }, arguments[1] || {});
michael@0:     this.start(options);
michael@0:   },
michael@0:   update: function(position) {
michael@0:     this.element.setOpacity(position);
michael@0:   }
michael@0: });
michael@0: 
michael@0: Effect.Move = Class.create();
michael@0: Object.extend(Object.extend(Effect.Move.prototype, Effect.Base.prototype), {
michael@0:   initialize: function(element) {
michael@0:     this.element = $(element);
michael@0:     if(!this.element) throw(Effect._elementDoesNotExistError);
michael@0:     var options = Object.extend({
michael@0:       x:    0,
michael@0:       y:    0,
michael@0:       mode: 'relative'
michael@0:     }, arguments[1] || {});
michael@0:     this.start(options);
michael@0:   },
michael@0:   setup: function() {
michael@0:     // Bug in Opera: Opera returns the "real" position of a static element or
michael@0:     // relative element that does not have top/left explicitly set.
michael@0:     // ==> Always set top and left for position relative elements in your stylesheets 
michael@0:     // (to 0 if you do not need them) 
michael@0:     this.element.makePositioned();
michael@0:     this.originalLeft = parseFloat(this.element.getStyle('left') || '0');
michael@0:     this.originalTop  = parseFloat(this.element.getStyle('top')  || '0');
michael@0:     if(this.options.mode == 'absolute') {
michael@0:       // absolute movement, so we need to calc deltaX and deltaY
michael@0:       this.options.x = this.options.x - this.originalLeft;
michael@0:       this.options.y = this.options.y - this.originalTop;
michael@0:     }
michael@0:   },
michael@0:   update: function(position) {
michael@0:     this.element.setStyle({
michael@0:       left: Math.round(this.options.x  * position + this.originalLeft) + 'px',
michael@0:       top:  Math.round(this.options.y  * position + this.originalTop)  + 'px'
michael@0:     });
michael@0:   }
michael@0: });
michael@0: 
michael@0: // for backwards compatibility
michael@0: Effect.MoveBy = function(element, toTop, toLeft) {
michael@0:   return new Effect.Move(element, 
michael@0:     Object.extend({ x: toLeft, y: toTop }, arguments[3] || {}));
michael@0: };
michael@0: 
michael@0: Effect.Scale = Class.create();
michael@0: Object.extend(Object.extend(Effect.Scale.prototype, Effect.Base.prototype), {
michael@0:   initialize: function(element, percent) {
michael@0:     this.element = $(element);
michael@0:     if(!this.element) throw(Effect._elementDoesNotExistError);
michael@0:     var options = Object.extend({
michael@0:       scaleX: true,
michael@0:       scaleY: true,
michael@0:       scaleContent: true,
michael@0:       scaleFromCenter: false,
michael@0:       scaleMode: 'box',        // 'box' or 'contents' or {} with provided values
michael@0:       scaleFrom: 100.0,
michael@0:       scaleTo:   percent
michael@0:     }, arguments[2] || {});
michael@0:     this.start(options);
michael@0:   },
michael@0:   setup: function() {
michael@0:     this.restoreAfterFinish = this.options.restoreAfterFinish || false;
michael@0:     this.elementPositioning = this.element.getStyle('position');
michael@0:     
michael@0:     this.originalStyle = {};
michael@0:     ['top','left','width','height','fontSize'].each( function(k) {
michael@0:       this.originalStyle[k] = this.element.style[k];
michael@0:     }.bind(this));
michael@0:       
michael@0:     this.originalTop  = this.element.offsetTop;
michael@0:     this.originalLeft = this.element.offsetLeft;
michael@0:     
michael@0:     var fontSize = this.element.getStyle('font-size') || '100%';
michael@0:     ['em','px','%','pt'].each( function(fontSizeType) {
michael@0:       if(fontSize.indexOf(fontSizeType)>0) {
michael@0:         this.fontSize     = parseFloat(fontSize);
michael@0:         this.fontSizeType = fontSizeType;
michael@0:       }
michael@0:     }.bind(this));
michael@0:     
michael@0:     this.factor = (this.options.scaleTo - this.options.scaleFrom)/100;
michael@0:     
michael@0:     this.dims = null;
michael@0:     if(this.options.scaleMode=='box')
michael@0:       this.dims = [this.element.offsetHeight, this.element.offsetWidth];
michael@0:     if(/^content/.test(this.options.scaleMode))
michael@0:       this.dims = [this.element.scrollHeight, this.element.scrollWidth];
michael@0:     if(!this.dims)
michael@0:       this.dims = [this.options.scaleMode.originalHeight,
michael@0:                    this.options.scaleMode.originalWidth];
michael@0:   },
michael@0:   update: function(position) {
michael@0:     var currentScale = (this.options.scaleFrom/100.0) + (this.factor * position);
michael@0:     if(this.options.scaleContent && this.fontSize)
michael@0:       this.element.setStyle({fontSize: this.fontSize * currentScale + this.fontSizeType });
michael@0:     this.setDimensions(this.dims[0] * currentScale, this.dims[1] * currentScale);
michael@0:   },
michael@0:   finish: function(position) {
michael@0:     if(this.restoreAfterFinish) this.element.setStyle(this.originalStyle);
michael@0:   },
michael@0:   setDimensions: function(height, width) {
michael@0:     var d = {};
michael@0:     if(this.options.scaleX) d.width = Math.round(width) + 'px';
michael@0:     if(this.options.scaleY) d.height = Math.round(height) + 'px';
michael@0:     if(this.options.scaleFromCenter) {
michael@0:       var topd  = (height - this.dims[0])/2;
michael@0:       var leftd = (width  - this.dims[1])/2;
michael@0:       if(this.elementPositioning == 'absolute') {
michael@0:         if(this.options.scaleY) d.top = this.originalTop-topd + 'px';
michael@0:         if(this.options.scaleX) d.left = this.originalLeft-leftd + 'px';
michael@0:       } else {
michael@0:         if(this.options.scaleY) d.top = -topd + 'px';
michael@0:         if(this.options.scaleX) d.left = -leftd + 'px';
michael@0:       }
michael@0:     }
michael@0:     this.element.setStyle(d);
michael@0:   }
michael@0: });
michael@0: 
michael@0: Effect.Highlight = Class.create();
michael@0: Object.extend(Object.extend(Effect.Highlight.prototype, Effect.Base.prototype), {
michael@0:   initialize: function(element) {
michael@0:     this.element = $(element);
michael@0:     if(!this.element) throw(Effect._elementDoesNotExistError);
michael@0:     var options = Object.extend({ startcolor: '#ffff99' }, arguments[1] || {});
michael@0:     this.start(options);
michael@0:   },
michael@0:   setup: function() {
michael@0:     // Prevent executing on elements not in the layout flow
michael@0:     if(this.element.getStyle('display')=='none') { this.cancel(); return; }
michael@0:     // Disable background image during the effect
michael@0:     this.oldStyle = {};
michael@0:     if (!this.options.keepBackgroundImage) {
michael@0:       this.oldStyle.backgroundImage = this.element.getStyle('background-image');
michael@0:       this.element.setStyle({backgroundImage: 'none'});
michael@0:     }
michael@0:     if(!this.options.endcolor)
michael@0:       this.options.endcolor = this.element.getStyle('background-color').parseColor('#ffffff');
michael@0:     if(!this.options.restorecolor)
michael@0:       this.options.restorecolor = this.element.getStyle('background-color');
michael@0:     // init color calculations
michael@0:     this._base  = $R(0,2).map(function(i){ return parseInt(this.options.startcolor.slice(i*2+1,i*2+3),16) }.bind(this));
michael@0:     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));
michael@0:   },
michael@0:   update: function(position) {
michael@0:     this.element.setStyle({backgroundColor: $R(0,2).inject('#',function(m,v,i){
michael@0:       return m+(Math.round(this._base[i]+(this._delta[i]*position)).toColorPart()); }.bind(this)) });
michael@0:   },
michael@0:   finish: function() {
michael@0:     this.element.setStyle(Object.extend(this.oldStyle, {
michael@0:       backgroundColor: this.options.restorecolor
michael@0:     }));
michael@0:   }
michael@0: });
michael@0: 
michael@0: Effect.ScrollTo = Class.create();
michael@0: Object.extend(Object.extend(Effect.ScrollTo.prototype, Effect.Base.prototype), {
michael@0:   initialize: function(element) {
michael@0:     this.element = $(element);
michael@0:     this.start(arguments[1] || {});
michael@0:   },
michael@0:   setup: function() {
michael@0:     Position.prepare();
michael@0:     var offsets = Position.cumulativeOffset(this.element);
michael@0:     if(this.options.offset) offsets[1] += this.options.offset;
michael@0:     var max = window.innerHeight ? 
michael@0:       window.height - window.innerHeight :
michael@0:       document.body.scrollHeight - 
michael@0:         (document.documentElement.clientHeight ? 
michael@0:           document.documentElement.clientHeight : document.body.clientHeight);
michael@0:     this.scrollStart = Position.deltaY;
michael@0:     this.delta = (offsets[1] > max ? max : offsets[1]) - this.scrollStart;
michael@0:   },
michael@0:   update: function(position) {
michael@0:     Position.prepare();
michael@0:     window.scrollTo(Position.deltaX, 
michael@0:       this.scrollStart + (position*this.delta));
michael@0:   }
michael@0: });
michael@0: 
michael@0: /* ------------- combination effects ------------- */
michael@0: 
michael@0: Effect.Fade = function(element) {
michael@0:   element = $(element);
michael@0:   var oldOpacity = element.getInlineOpacity();
michael@0:   var options = Object.extend({
michael@0:   from: element.getOpacity() || 1.0,
michael@0:   to:   0.0,
michael@0:   afterFinishInternal: function(effect) { 
michael@0:     if(effect.options.to!=0) return;
michael@0:     effect.element.hide().setStyle({opacity: oldOpacity}); 
michael@0:   }}, arguments[1] || {});
michael@0:   return new Effect.Opacity(element,options);
michael@0: }
michael@0: 
michael@0: Effect.Appear = function(element) {
michael@0:   element = $(element);
michael@0:   var options = Object.extend({
michael@0:   from: (element.getStyle('display') == 'none' ? 0.0 : element.getOpacity() || 0.0),
michael@0:   to:   1.0,
michael@0:   // force Safari to render floated elements properly
michael@0:   afterFinishInternal: function(effect) {
michael@0:     effect.element.forceRerendering();
michael@0:   },
michael@0:   beforeSetup: function(effect) {
michael@0:     effect.element.setOpacity(effect.options.from).show(); 
michael@0:   }}, arguments[1] || {});
michael@0:   return new Effect.Opacity(element,options);
michael@0: }
michael@0: 
michael@0: Effect.Puff = function(element) {
michael@0:   element = $(element);
michael@0:   var oldStyle = { 
michael@0:     opacity: element.getInlineOpacity(), 
michael@0:     position: element.getStyle('position'),
michael@0:     top:  element.style.top,
michael@0:     left: element.style.left,
michael@0:     width: element.style.width,
michael@0:     height: element.style.height
michael@0:   };
michael@0:   return new Effect.Parallel(
michael@0:    [ new Effect.Scale(element, 200, 
michael@0:       { sync: true, scaleFromCenter: true, scaleContent: true, restoreAfterFinish: true }), 
michael@0:      new Effect.Opacity(element, { sync: true, to: 0.0 } ) ], 
michael@0:      Object.extend({ duration: 1.0, 
michael@0:       beforeSetupInternal: function(effect) {
michael@0:         Position.absolutize(effect.effects[0].element)
michael@0:       },
michael@0:       afterFinishInternal: function(effect) {
michael@0:          effect.effects[0].element.hide().setStyle(oldStyle); }
michael@0:      }, arguments[1] || {})
michael@0:    );
michael@0: }
michael@0: 
michael@0: Effect.BlindUp = function(element) {
michael@0:   element = $(element);
michael@0:   element.makeClipping();
michael@0:   return new Effect.Scale(element, 0,
michael@0:     Object.extend({ scaleContent: false, 
michael@0:       scaleX: false, 
michael@0:       restoreAfterFinish: true,
michael@0:       afterFinishInternal: function(effect) {
michael@0:         effect.element.hide().undoClipping();
michael@0:       } 
michael@0:     }, arguments[1] || {})
michael@0:   );
michael@0: }
michael@0: 
michael@0: Effect.BlindDown = function(element) {
michael@0:   element = $(element);
michael@0:   var elementDimensions = element.getDimensions();
michael@0:   return new Effect.Scale(element, 100, Object.extend({ 
michael@0:     scaleContent: false, 
michael@0:     scaleX: false,
michael@0:     scaleFrom: 0,
michael@0:     scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
michael@0:     restoreAfterFinish: true,
michael@0:     afterSetup: function(effect) {
michael@0:       effect.element.makeClipping().setStyle({height: '0px'}).show(); 
michael@0:     },  
michael@0:     afterFinishInternal: function(effect) {
michael@0:       effect.element.undoClipping();
michael@0:     }
michael@0:   }, arguments[1] || {}));
michael@0: }
michael@0: 
michael@0: Effect.SwitchOff = function(element) {
michael@0:   element = $(element);
michael@0:   var oldOpacity = element.getInlineOpacity();
michael@0:   return new Effect.Appear(element, Object.extend({
michael@0:     duration: 0.4,
michael@0:     from: 0,
michael@0:     transition: Effect.Transitions.flicker,
michael@0:     afterFinishInternal: function(effect) {
michael@0:       new Effect.Scale(effect.element, 1, { 
michael@0:         duration: 0.3, scaleFromCenter: true,
michael@0:         scaleX: false, scaleContent: false, restoreAfterFinish: true,
michael@0:         beforeSetup: function(effect) { 
michael@0:           effect.element.makePositioned().makeClipping();
michael@0:         },
michael@0:         afterFinishInternal: function(effect) {
michael@0:           effect.element.hide().undoClipping().undoPositioned().setStyle({opacity: oldOpacity});
michael@0:         }
michael@0:       })
michael@0:     }
michael@0:   }, arguments[1] || {}));
michael@0: }
michael@0: 
michael@0: Effect.DropOut = function(element) {
michael@0:   element = $(element);
michael@0:   var oldStyle = {
michael@0:     top: element.getStyle('top'),
michael@0:     left: element.getStyle('left'),
michael@0:     opacity: element.getInlineOpacity() };
michael@0:   return new Effect.Parallel(
michael@0:     [ new Effect.Move(element, {x: 0, y: 100, sync: true }), 
michael@0:       new Effect.Opacity(element, { sync: true, to: 0.0 }) ],
michael@0:     Object.extend(
michael@0:       { duration: 0.5,
michael@0:         beforeSetup: function(effect) {
michael@0:           effect.effects[0].element.makePositioned(); 
michael@0:         },
michael@0:         afterFinishInternal: function(effect) {
michael@0:           effect.effects[0].element.hide().undoPositioned().setStyle(oldStyle);
michael@0:         } 
michael@0:       }, arguments[1] || {}));
michael@0: }
michael@0: 
michael@0: Effect.Shake = function(element) {
michael@0:   element = $(element);
michael@0:   var oldStyle = {
michael@0:     top: element.getStyle('top'),
michael@0:     left: element.getStyle('left') };
michael@0:     return new Effect.Move(element, 
michael@0:       { x:  20, y: 0, duration: 0.05, afterFinishInternal: function(effect) {
michael@0:     new Effect.Move(effect.element,
michael@0:       { x: -40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
michael@0:     new Effect.Move(effect.element,
michael@0:       { x:  40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
michael@0:     new Effect.Move(effect.element,
michael@0:       { x: -40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
michael@0:     new Effect.Move(effect.element,
michael@0:       { x:  40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
michael@0:     new Effect.Move(effect.element,
michael@0:       { x: -20, y: 0, duration: 0.05, afterFinishInternal: function(effect) {
michael@0:         effect.element.undoPositioned().setStyle(oldStyle);
michael@0:   }}) }}) }}) }}) }}) }});
michael@0: }
michael@0: 
michael@0: Effect.SlideDown = function(element) {
michael@0:   element = $(element).cleanWhitespace();
michael@0:   // SlideDown need to have the content of the element wrapped in a container element with fixed height!
michael@0:   var oldInnerBottom = element.down().getStyle('bottom');
michael@0:   var elementDimensions = element.getDimensions();
michael@0:   return new Effect.Scale(element, 100, Object.extend({ 
michael@0:     scaleContent: false, 
michael@0:     scaleX: false, 
michael@0:     scaleFrom: window.opera ? 0 : 1,
michael@0:     scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
michael@0:     restoreAfterFinish: true,
michael@0:     afterSetup: function(effect) {
michael@0:       effect.element.makePositioned();
michael@0:       effect.element.down().makePositioned();
michael@0:       if(window.opera) effect.element.setStyle({top: ''});
michael@0:       effect.element.makeClipping().setStyle({height: '0px'}).show(); 
michael@0:     },
michael@0:     afterUpdateInternal: function(effect) {
michael@0:       effect.element.down().setStyle({bottom:
michael@0:         (effect.dims[0] - effect.element.clientHeight) + 'px' }); 
michael@0:     },
michael@0:     afterFinishInternal: function(effect) {
michael@0:       effect.element.undoClipping().undoPositioned();
michael@0:       effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom}); }
michael@0:     }, arguments[1] || {})
michael@0:   );
michael@0: }
michael@0: 
michael@0: Effect.SlideUp = function(element) {
michael@0:   element = $(element).cleanWhitespace();
michael@0:   var oldInnerBottom = element.down().getStyle('bottom');
michael@0:   return new Effect.Scale(element, window.opera ? 0 : 1,
michael@0:    Object.extend({ scaleContent: false, 
michael@0:     scaleX: false, 
michael@0:     scaleMode: 'box',
michael@0:     scaleFrom: 100,
michael@0:     restoreAfterFinish: true,
michael@0:     beforeStartInternal: function(effect) {
michael@0:       effect.element.makePositioned();
michael@0:       effect.element.down().makePositioned();
michael@0:       if(window.opera) effect.element.setStyle({top: ''});
michael@0:       effect.element.makeClipping().show();
michael@0:     },  
michael@0:     afterUpdateInternal: function(effect) {
michael@0:       effect.element.down().setStyle({bottom:
michael@0:         (effect.dims[0] - effect.element.clientHeight) + 'px' });
michael@0:     },
michael@0:     afterFinishInternal: function(effect) {
michael@0:       effect.element.hide().undoClipping().undoPositioned().setStyle({bottom: oldInnerBottom});
michael@0:       effect.element.down().undoPositioned();
michael@0:     }
michael@0:    }, arguments[1] || {})
michael@0:   );
michael@0: }
michael@0: 
michael@0: // Bug in opera makes the TD containing this element expand for a instance after finish 
michael@0: Effect.Squish = function(element) {
michael@0:   return new Effect.Scale(element, window.opera ? 1 : 0, { 
michael@0:     restoreAfterFinish: true,
michael@0:     beforeSetup: function(effect) {
michael@0:       effect.element.makeClipping(); 
michael@0:     },  
michael@0:     afterFinishInternal: function(effect) {
michael@0:       effect.element.hide().undoClipping(); 
michael@0:     }
michael@0:   });
michael@0: }
michael@0: 
michael@0: Effect.Grow = function(element) {
michael@0:   element = $(element);
michael@0:   var options = Object.extend({
michael@0:     direction: 'center',
michael@0:     moveTransition: Effect.Transitions.sinoidal,
michael@0:     scaleTransition: Effect.Transitions.sinoidal,
michael@0:     opacityTransition: Effect.Transitions.full
michael@0:   }, arguments[1] || {});
michael@0:   var oldStyle = {
michael@0:     top: element.style.top,
michael@0:     left: element.style.left,
michael@0:     height: element.style.height,
michael@0:     width: element.style.width,
michael@0:     opacity: element.getInlineOpacity() };
michael@0: 
michael@0:   var dims = element.getDimensions();    
michael@0:   var initialMoveX, initialMoveY;
michael@0:   var moveX, moveY;
michael@0:   
michael@0:   switch (options.direction) {
michael@0:     case 'top-left':
michael@0:       initialMoveX = initialMoveY = moveX = moveY = 0; 
michael@0:       break;
michael@0:     case 'top-right':
michael@0:       initialMoveX = dims.width;
michael@0:       initialMoveY = moveY = 0;
michael@0:       moveX = -dims.width;
michael@0:       break;
michael@0:     case 'bottom-left':
michael@0:       initialMoveX = moveX = 0;
michael@0:       initialMoveY = dims.height;
michael@0:       moveY = -dims.height;
michael@0:       break;
michael@0:     case 'bottom-right':
michael@0:       initialMoveX = dims.width;
michael@0:       initialMoveY = dims.height;
michael@0:       moveX = -dims.width;
michael@0:       moveY = -dims.height;
michael@0:       break;
michael@0:     case 'center':
michael@0:       initialMoveX = dims.width / 2;
michael@0:       initialMoveY = dims.height / 2;
michael@0:       moveX = -dims.width / 2;
michael@0:       moveY = -dims.height / 2;
michael@0:       break;
michael@0:   }
michael@0:   
michael@0:   return new Effect.Move(element, {
michael@0:     x: initialMoveX,
michael@0:     y: initialMoveY,
michael@0:     duration: 0.01, 
michael@0:     beforeSetup: function(effect) {
michael@0:       effect.element.hide().makeClipping().makePositioned();
michael@0:     },
michael@0:     afterFinishInternal: function(effect) {
michael@0:       new Effect.Parallel(
michael@0:         [ new Effect.Opacity(effect.element, { sync: true, to: 1.0, from: 0.0, transition: options.opacityTransition }),
michael@0:           new Effect.Move(effect.element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition }),
michael@0:           new Effect.Scale(effect.element, 100, {
michael@0:             scaleMode: { originalHeight: dims.height, originalWidth: dims.width }, 
michael@0:             sync: true, scaleFrom: window.opera ? 1 : 0, transition: options.scaleTransition, restoreAfterFinish: true})
michael@0:         ], Object.extend({
michael@0:              beforeSetup: function(effect) {
michael@0:                effect.effects[0].element.setStyle({height: '0px'}).show(); 
michael@0:              },
michael@0:              afterFinishInternal: function(effect) {
michael@0:                effect.effects[0].element.undoClipping().undoPositioned().setStyle(oldStyle); 
michael@0:              }
michael@0:            }, options)
michael@0:       )
michael@0:     }
michael@0:   });
michael@0: }
michael@0: 
michael@0: Effect.Shrink = function(element) {
michael@0:   element = $(element);
michael@0:   var options = Object.extend({
michael@0:     direction: 'center',
michael@0:     moveTransition: Effect.Transitions.sinoidal,
michael@0:     scaleTransition: Effect.Transitions.sinoidal,
michael@0:     opacityTransition: Effect.Transitions.none
michael@0:   }, arguments[1] || {});
michael@0:   var oldStyle = {
michael@0:     top: element.style.top,
michael@0:     left: element.style.left,
michael@0:     height: element.style.height,
michael@0:     width: element.style.width,
michael@0:     opacity: element.getInlineOpacity() };
michael@0: 
michael@0:   var dims = element.getDimensions();
michael@0:   var moveX, moveY;
michael@0:   
michael@0:   switch (options.direction) {
michael@0:     case 'top-left':
michael@0:       moveX = moveY = 0;
michael@0:       break;
michael@0:     case 'top-right':
michael@0:       moveX = dims.width;
michael@0:       moveY = 0;
michael@0:       break;
michael@0:     case 'bottom-left':
michael@0:       moveX = 0;
michael@0:       moveY = dims.height;
michael@0:       break;
michael@0:     case 'bottom-right':
michael@0:       moveX = dims.width;
michael@0:       moveY = dims.height;
michael@0:       break;
michael@0:     case 'center':  
michael@0:       moveX = dims.width / 2;
michael@0:       moveY = dims.height / 2;
michael@0:       break;
michael@0:   }
michael@0:   
michael@0:   return new Effect.Parallel(
michael@0:     [ new Effect.Opacity(element, { sync: true, to: 0.0, from: 1.0, transition: options.opacityTransition }),
michael@0:       new Effect.Scale(element, window.opera ? 1 : 0, { sync: true, transition: options.scaleTransition, restoreAfterFinish: true}),
michael@0:       new Effect.Move(element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition })
michael@0:     ], Object.extend({            
michael@0:          beforeStartInternal: function(effect) {
michael@0:            effect.effects[0].element.makePositioned().makeClipping(); 
michael@0:          },
michael@0:          afterFinishInternal: function(effect) {
michael@0:            effect.effects[0].element.hide().undoClipping().undoPositioned().setStyle(oldStyle); }
michael@0:        }, options)
michael@0:   );
michael@0: }
michael@0: 
michael@0: Effect.Pulsate = function(element) {
michael@0:   element = $(element);
michael@0:   var options    = arguments[1] || {};
michael@0:   var oldOpacity = element.getInlineOpacity();
michael@0:   var transition = options.transition || Effect.Transitions.sinoidal;
michael@0:   var reverser   = function(pos){ return transition(1-Effect.Transitions.pulse(pos, options.pulses)) };
michael@0:   reverser.bind(transition);
michael@0:   return new Effect.Opacity(element, 
michael@0:     Object.extend(Object.extend({  duration: 2.0, from: 0,
michael@0:       afterFinishInternal: function(effect) { effect.element.setStyle({opacity: oldOpacity}); }
michael@0:     }, options), {transition: reverser}));
michael@0: }
michael@0: 
michael@0: Effect.Fold = function(element) {
michael@0:   element = $(element);
michael@0:   var oldStyle = {
michael@0:     top: element.style.top,
michael@0:     left: element.style.left,
michael@0:     width: element.style.width,
michael@0:     height: element.style.height };
michael@0:   element.makeClipping();
michael@0:   return new Effect.Scale(element, 5, Object.extend({   
michael@0:     scaleContent: false,
michael@0:     scaleX: false,
michael@0:     afterFinishInternal: function(effect) {
michael@0:     new Effect.Scale(element, 1, { 
michael@0:       scaleContent: false, 
michael@0:       scaleY: false,
michael@0:       afterFinishInternal: function(effect) {
michael@0:         effect.element.hide().undoClipping().setStyle(oldStyle);
michael@0:       } });
michael@0:   }}, arguments[1] || {}));
michael@0: };
michael@0: 
michael@0: Effect.Morph = Class.create();
michael@0: Object.extend(Object.extend(Effect.Morph.prototype, Effect.Base.prototype), {
michael@0:   initialize: function(element) {
michael@0:     this.element = $(element);
michael@0:     if(!this.element) throw(Effect._elementDoesNotExistError);
michael@0:     var options = Object.extend({
michael@0:       style: {}
michael@0:     }, arguments[1] || {});
michael@0:     if (typeof options.style == 'string') {
michael@0:       if(options.style.indexOf(':') == -1) {
michael@0:         var cssText = '', selector = '.' + options.style;
michael@0:         $A(document.styleSheets).reverse().each(function(styleSheet) {
michael@0:           if (styleSheet.cssRules) cssRules = styleSheet.cssRules;
michael@0:           else if (styleSheet.rules) cssRules = styleSheet.rules;
michael@0:           $A(cssRules).reverse().each(function(rule) {
michael@0:             if (selector == rule.selectorText) {
michael@0:               cssText = rule.style.cssText;
michael@0:               throw $break;
michael@0:             }
michael@0:           });
michael@0:           if (cssText) throw $break;
michael@0:         });
michael@0:         this.style = cssText.parseStyle();
michael@0:         options.afterFinishInternal = function(effect){
michael@0:           effect.element.addClassName(effect.options.style);
michael@0:           effect.transforms.each(function(transform) {
michael@0:             if(transform.style != 'opacity')
michael@0:               effect.element.style[transform.style] = '';
michael@0:           });
michael@0:         }
michael@0:       } else this.style = options.style.parseStyle();
michael@0:     } else this.style = $H(options.style)
michael@0:     this.start(options);
michael@0:   },
michael@0:   setup: function(){
michael@0:     function parseColor(color){
michael@0:       if(!color || ['rgba(0, 0, 0, 0)','transparent'].include(color)) color = '#ffffff';
michael@0:       color = color.parseColor();
michael@0:       return $R(0,2).map(function(i){
michael@0:         return parseInt( color.slice(i*2+1,i*2+3), 16 ) 
michael@0:       });
michael@0:     }
michael@0:     this.transforms = this.style.map(function(pair){
michael@0:       var property = pair[0], value = pair[1], unit = null;
michael@0: 
michael@0:       if(value.parseColor('#zzzzzz') != '#zzzzzz') {
michael@0:         value = value.parseColor();
michael@0:         unit  = 'color';
michael@0:       } else if(property == 'opacity') {
michael@0:         value = parseFloat(value);
michael@0:         if(Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
michael@0:           this.element.setStyle({zoom: 1});
michael@0:       } else if(Element.CSS_LENGTH.test(value)) {
michael@0:           var components = value.match(/^([\+\-]?[0-9\.]+)(.*)$/);
michael@0:           value = parseFloat(components[1]);
michael@0:           unit = (components.length == 3) ? components[2] : null;
michael@0:       }
michael@0: 
michael@0:       var originalValue = this.element.getStyle(property);
michael@0:       return { 
michael@0:         style: property.camelize(), 
michael@0:         originalValue: unit=='color' ? parseColor(originalValue) : parseFloat(originalValue || 0), 
michael@0:         targetValue: unit=='color' ? parseColor(value) : value,
michael@0:         unit: unit
michael@0:       };
michael@0:     }.bind(this)).reject(function(transform){
michael@0:       return (
michael@0:         (transform.originalValue == transform.targetValue) ||
michael@0:         (
michael@0:           transform.unit != 'color' &&
michael@0:           (isNaN(transform.originalValue) || isNaN(transform.targetValue))
michael@0:         )
michael@0:       )
michael@0:     });
michael@0:   },
michael@0:   update: function(position) {
michael@0:     var style = {}, transform, i = this.transforms.length;
michael@0:     while(i--)
michael@0:       style[(transform = this.transforms[i]).style] = 
michael@0:         transform.unit=='color' ? '#'+
michael@0:           (Math.round(transform.originalValue[0]+
michael@0:             (transform.targetValue[0]-transform.originalValue[0])*position)).toColorPart() +
michael@0:           (Math.round(transform.originalValue[1]+
michael@0:             (transform.targetValue[1]-transform.originalValue[1])*position)).toColorPart() +
michael@0:           (Math.round(transform.originalValue[2]+
michael@0:             (transform.targetValue[2]-transform.originalValue[2])*position)).toColorPart() :
michael@0:         transform.originalValue + Math.round(
michael@0:           ((transform.targetValue - transform.originalValue) * position) * 1000)/1000 + transform.unit;
michael@0:     this.element.setStyle(style, true);
michael@0:   }
michael@0: });
michael@0: 
michael@0: Effect.Transform = Class.create();
michael@0: Object.extend(Effect.Transform.prototype, {
michael@0:   initialize: function(tracks){
michael@0:     this.tracks  = [];
michael@0:     this.options = arguments[1] || {};
michael@0:     this.addTracks(tracks);
michael@0:   },
michael@0:   addTracks: function(tracks){
michael@0:     tracks.each(function(track){
michael@0:       var data = $H(track).values().first();
michael@0:       this.tracks.push($H({
michael@0:         ids:     $H(track).keys().first(),
michael@0:         effect:  Effect.Morph,
michael@0:         options: { style: data }
michael@0:       }));
michael@0:     }.bind(this));
michael@0:     return this;
michael@0:   },
michael@0:   play: function(){
michael@0:     return new Effect.Parallel(
michael@0:       this.tracks.map(function(track){
michael@0:         var elements = [$(track.ids) || $$(track.ids)].flatten();
michael@0:         return elements.map(function(e){ return new track.effect(e, Object.extend({ sync:true }, track.options)) });
michael@0:       }).flatten(),
michael@0:       this.options
michael@0:     );
michael@0:   }
michael@0: });
michael@0: 
michael@0: Element.CSS_PROPERTIES = $w(
michael@0:   'backgroundColor backgroundPosition borderBottomColor borderBottomStyle ' + 
michael@0:   'borderBottomWidth borderLeftColor borderLeftStyle borderLeftWidth ' +
michael@0:   'borderRightColor borderRightStyle borderRightWidth borderSpacing ' +
michael@0:   'borderTopColor borderTopStyle borderTopWidth bottom clip color ' +
michael@0:   'fontSize fontWeight height left letterSpacing lineHeight ' +
michael@0:   'marginBottom marginLeft marginRight marginTop markerOffset maxHeight '+
michael@0:   'maxWidth minHeight minWidth opacity outlineColor outlineOffset ' +
michael@0:   'outlineWidth paddingBottom paddingLeft paddingRight paddingTop ' +
michael@0:   'right textIndent top width wordSpacing zIndex');
michael@0:   
michael@0: Element.CSS_LENGTH = /^(([\+\-]?[0-9\.]+)(em|ex|px|in|cm|mm|pt|pc|\%))|0$/;
michael@0: 
michael@0: String.prototype.parseStyle = function(){
michael@0:   var element = document.createElement('div');
michael@0:   element.innerHTML = '<div style="' + this + '"></div>';
michael@0:   var style = element.childNodes[0].style, styleRules = $H();
michael@0:   
michael@0:   Element.CSS_PROPERTIES.each(function(property){
michael@0:     if(style[property]) styleRules[property] = style[property]; 
michael@0:   });
michael@0:   if(Prototype.Browser.IE && this.indexOf('opacity') > -1) {
michael@0:     styleRules.opacity = this.match(/opacity:\s*((?:0|1)?(?:\.\d*)?)/)[1];
michael@0:   }
michael@0:   return styleRules;
michael@0: };
michael@0: 
michael@0: Element.morph = function(element, style) {
michael@0:   new Effect.Morph(element, Object.extend({ style: style }, arguments[2] || {}));
michael@0:   return element;
michael@0: };
michael@0: 
michael@0: ['getInlineOpacity','forceRerendering','setContentZoom',
michael@0:  'collectTextNodes','collectTextNodesIgnoreClass','morph'].each( 
michael@0:   function(f) { Element.Methods[f] = Element[f]; }
michael@0: );
michael@0: 
michael@0: Element.Methods.visualEffect = function(element, effect, options) {
michael@0:   s = effect.dasherize().camelize();
michael@0:   effect_class = s.charAt(0).toUpperCase() + s.substring(1);
michael@0:   new Effect[effect_class](element, options);
michael@0:   return $(element);
michael@0: };
michael@0: 
michael@0: Element.addMethods();