/lib/effects.js

   1// script.aculo.us effects.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008
   2
   3// Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
   4// Contributors:
   5//  Justin Palmer (http://encytemedia.com/)
   6//  Mark Pilgrim (http://diveintomark.org/)
   7//  Martin Bialasinki
   8// 
   9// script.aculo.us is freely distributable under the terms of an MIT-style license.
  10// For details, see the script.aculo.us web site: http://script.aculo.us/ 
  11
  12// converts rgb() and #xxx to #xxxxxx format,  
  13// returns self (or first argument) if not convertable  
  14String.prototype.parseColor = function() {  
  15  var color = '#';
  16  if (this.slice(0,4) == 'rgb(') {  
  17    var cols = this.slice(4,this.length-1).split(',');  
  18    var i=0; do { color += parseInt(cols[i]).toColorPart() } while (++i<3);  
  19  } else {  
  20    if (this.slice(0,1) == '#') {  
  21      if (this.length==4) for(var i=1;i<4;i++) color += (this.charAt(i) + this.charAt(i)).toLowerCase();  
  22      if (this.length==7) color = this.toLowerCase();  
  23    }  
  24  }  
  25  return (color.length==7 ? color : (arguments[0] || this));  
  26};
  27
  28/*--------------------------------------------------------------------------*/
  29
  30Element.collectTextNodes = function(element) {  
  31  return $A($(element).childNodes).collect( function(node) {
  32    return (node.nodeType==3 ? node.nodeValue : 
  33      (node.hasChildNodes() ? Element.collectTextNodes(node) : ''));
  34  }).flatten().join('');
  35};
  36
  37Element.collectTextNodesIgnoreClass = function(element, className) {  
  38  return $A($(element).childNodes).collect( function(node) {
  39    return (node.nodeType==3 ? node.nodeValue : 
  40      ((node.hasChildNodes() && !Element.hasClassName(node,className)) ? 
  41        Element.collectTextNodesIgnoreClass(node, className) : ''));
  42  }).flatten().join('');
  43};
  44
  45Element.setContentZoom = function(element, percent) {
  46  element = $(element);  
  47  element.setStyle({fontSize: (percent/100) + 'em'});   
  48  if (Prototype.Browser.WebKit) window.scrollBy(0,0);
  49  return element;
  50};
  51
  52Element.getInlineOpacity = function(element){
  53  return $(element).style.opacity || '';
  54};
  55
  56Element.forceRerendering = function(element) {
  57  try {
  58    element = $(element);
  59    var n = document.createTextNode(' ');
  60    element.appendChild(n);
  61    element.removeChild(n);
  62  } catch(e) { }
  63};
  64
  65/*--------------------------------------------------------------------------*/
  66
  67var Effect = {
  68  _elementDoesNotExistError: {
  69    name: 'ElementDoesNotExistError',
  70    message: 'The specified DOM element does not exist, but is required for this effect to operate'
  71  },
  72  Transitions: {
  73    linear: Prototype.K,
  74    sinoidal: function(pos) {
  75      return (-Math.cos(pos*Math.PI)/2) + 0.5;
  76    },
  77    reverse: function(pos) {
  78      return 1-pos;
  79    },
  80    flicker: function(pos) {
  81      var pos = ((-Math.cos(pos*Math.PI)/4) + 0.75) + Math.random()/4;
  82      return pos > 1 ? 1 : pos;
  83    },
  84    wobble: function(pos) {
  85      return (-Math.cos(pos*Math.PI*(9*pos))/2) + 0.5;
  86    },
  87    pulse: function(pos, pulses) { 
  88      pulses = pulses || 5; 
  89      return (
  90        ((pos % (1/pulses)) * pulses).round() == 0 ? 
  91              ((pos * pulses * 2) - (pos * pulses * 2).floor()) : 
  92          1 - ((pos * pulses * 2) - (pos * pulses * 2).floor())
  93        );
  94    },
  95    spring: function(pos) { 
  96      return 1 - (Math.cos(pos * 4.5 * Math.PI) * Math.exp(-pos * 6)); 
  97    },
  98    none: function(pos) {
  99      return 0;
 100    },
 101    full: function(pos) {
 102      return 1;
 103    }
 104  },
 105  DefaultOptions: {
 106    duration:   1.0,   // seconds
 107    fps:        100,   // 100= assume 66fps max.
 108    sync:       false, // true for combining
 109    from:       0.0,
 110    to:         1.0,
 111    delay:      0.0,
 112    queue:      'parallel'
 113  },
 114  tagifyText: function(element) {
 115    var tagifyStyle = 'position:relative';
 116    if (Prototype.Browser.IE) tagifyStyle += ';zoom:1';
 117    
 118    element = $(element);
 119    $A(element.childNodes).each( function(child) {
 120      if (child.nodeType==3) {
 121        child.nodeValue.toArray().each( function(character) {
 122          element.insertBefore(
 123            new Element('span', {style: tagifyStyle}).update(
 124              character == ' ' ? String.fromCharCode(160) : character), 
 125              child);
 126        });
 127        Element.remove(child);
 128      }
 129    });
 130  },
 131  multiple: function(element, effect) {
 132    var elements;
 133    if (((typeof element == 'object') || 
 134        Object.isFunction(element)) && 
 135       (element.length))
 136      elements = element;
 137    else
 138      elements = $(element).childNodes;
 139      
 140    var options = Object.extend({
 141      speed: 0.1,
 142      delay: 0.0
 143    }, arguments[2] || { });
 144    var masterDelay = options.delay;
 145
 146    $A(elements).each( function(element, index) {
 147      new effect(element, Object.extend(options, { delay: index * options.speed + masterDelay }));
 148    });
 149  },
 150  PAIRS: {
 151    'slide':  ['SlideDown','SlideUp'],
 152    'blind':  ['BlindDown','BlindUp'],
 153    'appear': ['Appear','Fade']
 154  },
 155  toggle: function(element, effect) {
 156    element = $(element);
 157    effect = (effect || 'appear').toLowerCase();
 158    var options = Object.extend({
 159      queue: { position:'end', scope:(element.id || 'global'), limit: 1 }
 160    }, arguments[2] || { });
 161    Effect[element.visible() ? 
 162      Effect.PAIRS[effect][1] : Effect.PAIRS[effect][0]](element, options);
 163  }
 164};
 165
 166Effect.DefaultOptions.transition = Effect.Transitions.sinoidal;
 167
 168/* ------------- core effects ------------- */
 169
 170Effect.ScopedQueue = Class.create(Enumerable, {
 171  initialize: function() {
 172    this.effects  = [];
 173    this.interval = null;    
 174  },
 175  _each: function(iterator) {
 176    this.effects._each(iterator);
 177  },
 178  add: function(effect) {
 179    var timestamp = new Date().getTime();
 180    
 181    var position = Object.isString(effect.options.queue) ? 
 182      effect.options.queue : effect.options.queue.position;
 183    
 184    switch(position) {
 185      case 'front':
 186        // move unstarted effects after this effect  
 187        this.effects.findAll(function(e){ return e.state=='idle' }).each( function(e) {
 188            e.startOn  += effect.finishOn;
 189            e.finishOn += effect.finishOn;
 190          });
 191        break;
 192      case 'with-last':
 193        timestamp = this.effects.pluck('startOn').max() || timestamp;
 194        break;
 195      case 'end':
 196        // start effect after last queued effect has finished
 197        timestamp = this.effects.pluck('finishOn').max() || timestamp;
 198        break;
 199    }
 200    
 201    effect.startOn  += timestamp;
 202    effect.finishOn += timestamp;
 203
 204    if (!effect.options.queue.limit || (this.effects.length < effect.options.queue.limit))
 205      this.effects.push(effect);
 206    
 207    if (!this.interval)
 208      this.interval = setInterval(this.loop.bind(this), 15);
 209  },
 210  remove: function(effect) {
 211    this.effects = this.effects.reject(function(e) { return e==effect });
 212    if (this.effects.length == 0) {
 213      clearInterval(this.interval);
 214      this.interval = null;
 215    }
 216  },
 217  loop: function() {
 218    var timePos = new Date().getTime();
 219    for(var i=0, len=this.effects.length;i<len;i++) 
 220      this.effects[i] && this.effects[i].loop(timePos);
 221  }
 222});
 223
 224Effect.Queues = {
 225  instances: $H(),
 226  get: function(queueName) {
 227    if (!Object.isString(queueName)) return queueName;
 228    
 229    return this.instances.get(queueName) ||
 230      this.instances.set(queueName, new Effect.ScopedQueue());
 231  }
 232};
 233Effect.Queue = Effect.Queues.get('global');
 234
 235Effect.Base = Class.create({
 236  position: null,
 237  start: function(options) {
 238    function codeForEvent(options,eventName){
 239      return (
 240        (options[eventName+'Internal'] ? 'this.options.'+eventName+'Internal(this);' : '') +
 241        (options[eventName] ? 'this.options.'+eventName+'(this);' : '')
 242      );
 243    }
 244    if (options && options.transition === false) options.transition = Effect.Transitions.linear;
 245    this.options      = Object.extend(Object.extend({ },Effect.DefaultOptions), options || { });
 246    this.currentFrame = 0;
 247    this.state        = 'idle';
 248    this.startOn      = this.options.delay*1000;
 249    this.finishOn     = this.startOn+(this.options.duration*1000);
 250    this.fromToDelta  = this.options.to-this.options.from;
 251    this.totalTime    = this.finishOn-this.startOn;
 252    this.totalFrames  = this.options.fps*this.options.duration;
 253    
 254    eval('this.render = function(pos){ '+
 255      'if (this.state=="idle"){this.state="running";'+
 256      codeForEvent(this.options,'beforeSetup')+
 257      (this.setup ? 'this.setup();':'')+ 
 258      codeForEvent(this.options,'afterSetup')+
 259      '};if (this.state=="running"){'+
 260      'pos=this.options.transition(pos)*'+this.fromToDelta+'+'+this.options.from+';'+
 261      'this.position=pos;'+
 262      codeForEvent(this.options,'beforeUpdate')+
 263      (this.update ? 'this.update(pos);':'')+
 264      codeForEvent(this.options,'afterUpdate')+
 265      '}}');
 266    
 267    this.event('beforeStart');
 268    if (!this.options.sync)
 269      Effect.Queues.get(Object.isString(this.options.queue) ? 
 270        'global' : this.options.queue.scope).add(this);
 271  },
 272  loop: function(timePos) {
 273    if (timePos >= this.startOn) {
 274      if (timePos >= this.finishOn) {
 275        this.render(1.0);
 276        this.cancel();
 277        this.event('beforeFinish');
 278        if (this.finish) this.finish(); 
 279        this.event('afterFinish');
 280        return;  
 281      }
 282      var pos   = (timePos - this.startOn) / this.totalTime,
 283          frame = (pos * this.totalFrames).round();
 284      if (frame > this.currentFrame) {
 285        this.render(pos);
 286        this.currentFrame = frame;
 287      }
 288    }
 289  },
 290  cancel: function() {
 291    if (!this.options.sync)
 292      Effect.Queues.get(Object.isString(this.options.queue) ? 
 293        'global' : this.options.queue.scope).remove(this);
 294    this.state = 'finished';
 295  },
 296  event: function(eventName) {
 297    if (this.options[eventName + 'Internal']) this.options[eventName + 'Internal'](this);
 298    if (this.options[eventName]) this.options[eventName](this);
 299  },
 300  inspect: function() {
 301    var data = $H();
 302    for(property in this)
 303      if (!Object.isFunction(this[property])) data.set(property, this[property]);
 304    return '#<Effect:' + data.inspect() + ',options:' + $H(this.options).inspect() + '>';
 305  }
 306});
 307
 308Effect.Parallel = Class.create(Effect.Base, {
 309  initialize: function(effects) {
 310    this.effects = effects || [];
 311    this.start(arguments[1]);
 312  },
 313  update: function(position) {
 314    this.effects.invoke('render', position);
 315  },
 316  finish: function(position) {
 317    this.effects.each( function(effect) {
 318      effect.render(1.0);
 319      effect.cancel();
 320      effect.event('beforeFinish');
 321      if (effect.finish) effect.finish(position);
 322      effect.event('afterFinish');
 323    });
 324  }
 325});
 326
 327Effect.Tween = Class.create(Effect.Base, {
 328  initialize: function(object, from, to) {
 329    object = Object.isString(object) ? $(object) : object;
 330    var args = $A(arguments), method = args.last(), 
 331      options = args.length == 5 ? args[3] : null;
 332    this.method = Object.isFunction(method) ? method.bind(object) :
 333      Object.isFunction(object[method]) ? object[method].bind(object) : 
 334      function(value) { object[method] = value };
 335    this.start(Object.extend({ from: from, to: to }, options || { }));
 336  },
 337  update: function(position) {
 338    this.method(position);
 339  }
 340});
 341
 342Effect.Event = Class.create(Effect.Base, {
 343  initialize: function() {
 344    this.start(Object.extend({ duration: 0 }, arguments[0] || { }));
 345  },
 346  update: Prototype.emptyFunction
 347});
 348
 349Effect.Opacity = Class.create(Effect.Base, {
 350  initialize: function(element) {
 351    this.element = $(element);
 352    if (!this.element) throw(Effect._elementDoesNotExistError);
 353    // make this work on IE on elements without 'layout'
 354    if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
 355      this.element.setStyle({zoom: 1});
 356    var options = Object.extend({
 357      from: this.element.getOpacity() || 0.0,
 358      to:   1.0
 359    }, arguments[1] || { });
 360    this.start(options);
 361  },
 362  update: function(position) {
 363    this.element.setOpacity(position);
 364  }
 365});
 366
 367Effect.Move = Class.create(Effect.Base, {
 368  initialize: function(element) {
 369    this.element = $(element);
 370    if (!this.element) throw(Effect._elementDoesNotExistError);
 371    var options = Object.extend({
 372      x:    0,
 373      y:    0,
 374      mode: 'relative'
 375    }, arguments[1] || { });
 376    this.start(options);
 377  },
 378  setup: function() {
 379    this.element.makePositioned();
 380    this.originalLeft = parseFloat(this.element.getStyle('left') || '0');
 381    this.originalTop  = parseFloat(this.element.getStyle('top')  || '0');
 382    if (this.options.mode == 'absolute') {
 383      this.options.x = this.options.x - this.originalLeft;
 384      this.options.y = this.options.y - this.originalTop;
 385    }
 386  },
 387  update: function(position) {
 388    this.element.setStyle({
 389      left: (this.options.x  * position + this.originalLeft).round() + 'px',
 390      top:  (this.options.y  * position + this.originalTop).round()  + 'px'
 391    });
 392  }
 393});
 394
 395// for backwards compatibility
 396Effect.MoveBy = function(element, toTop, toLeft) {
 397  return new Effect.Move(element, 
 398    Object.extend({ x: toLeft, y: toTop }, arguments[3] || { }));
 399};
 400
 401Effect.Scale = Class.create(Effect.Base, {
 402  initialize: function(element, percent) {
 403    this.element = $(element);
 404    if (!this.element) throw(Effect._elementDoesNotExistError);
 405    var options = Object.extend({
 406      scaleX: true,
 407      scaleY: true,
 408      scaleContent: true,
 409      scaleFromCenter: false,
 410      scaleMode: 'box',        // 'box' or 'contents' or { } with provided values
 411      scaleFrom: 100.0,
 412      scaleTo:   percent
 413    }, arguments[2] || { });
 414    this.start(options);
 415  },
 416  setup: function() {
 417    this.restoreAfterFinish = this.options.restoreAfterFinish || false;
 418    this.elementPositioning = this.element.getStyle('position');
 419    
 420    this.originalStyle = { };
 421    ['top','left','width','height','fontSize'].each( function(k) {
 422      this.originalStyle[k] = this.element.style[k];
 423    }.bind(this));
 424      
 425    this.originalTop  = this.element.offsetTop;
 426    this.originalLeft = this.element.offsetLeft;
 427    
 428    var fontSize = this.element.getStyle('font-size') || '100%';
 429    ['em','px','%','pt'].each( function(fontSizeType) {
 430      if (fontSize.indexOf(fontSizeType)>0) {
 431        this.fontSize     = parseFloat(fontSize);
 432        this.fontSizeType = fontSizeType;
 433      }
 434    }.bind(this));
 435    
 436    this.factor = (this.options.scaleTo - this.options.scaleFrom)/100;
 437    
 438    this.dims = null;
 439    if (this.options.scaleMode=='box')
 440      this.dims = [this.element.offsetHeight, this.element.offsetWidth];
 441    if (/^content/.test(this.options.scaleMode))
 442      this.dims = [this.element.scrollHeight, this.element.scrollWidth];
 443    if (!this.dims)
 444      this.dims = [this.options.scaleMode.originalHeight,
 445                   this.options.scaleMode.originalWidth];
 446  },
 447  update: function(position) {
 448    var currentScale = (this.options.scaleFrom/100.0) + (this.factor * position);
 449    if (this.options.scaleContent && this.fontSize)
 450      this.element.setStyle({fontSize: this.fontSize * currentScale + this.fontSizeType });
 451    this.setDimensions(this.dims[0] * currentScale, this.dims[1] * currentScale);
 452  },
 453  finish: function(position) {
 454    if (this.restoreAfterFinish) this.element.setStyle(this.originalStyle);
 455  },
 456  setDimensions: function(height, width) {
 457    var d = { };
 458    if (this.options.scaleX) d.width = width.round() + 'px';
 459    if (this.options.scaleY) d.height = height.round() + 'px';
 460    if (this.options.scaleFromCenter) {
 461      var topd  = (height - this.dims[0])/2;
 462      var leftd = (width  - this.dims[1])/2;
 463      if (this.elementPositioning == 'absolute') {
 464        if (this.options.scaleY) d.top = this.originalTop-topd + 'px';
 465        if (this.options.scaleX) d.left = this.originalLeft-leftd + 'px';
 466      } else {
 467        if (this.options.scaleY) d.top = -topd + 'px';
 468        if (this.options.scaleX) d.left = -leftd + 'px';
 469      }
 470    }
 471    this.element.setStyle(d);
 472  }
 473});
 474
 475Effect.Highlight = Class.create(Effect.Base, {
 476  initialize: function(element) {
 477    this.element = $(element);
 478    if (!this.element) throw(Effect._elementDoesNotExistError);
 479    var options = Object.extend({ startcolor: '#ffff99' }, arguments[1] || { });
 480    this.start(options);
 481  },
 482  setup: function() {
 483    // Prevent executing on elements not in the layout flow
 484    if (this.element.getStyle('display')=='none') { this.cancel(); return; }
 485    // Disable background image during the effect
 486    this.oldStyle = { };
 487    if (!this.options.keepBackgroundImage) {
 488      this.oldStyle.backgroundImage = this.element.getStyle('background-image');
 489      this.element.setStyle({backgroundImage: 'none'});
 490    }
 491    if (!this.options.endcolor)
 492      this.options.endcolor = this.element.getStyle('background-color').parseColor('#ffffff');
 493    if (!this.options.restorecolor)
 494      this.options.restorecolor = this.element.getStyle('background-color');
 495    // init color calculations
 496    this._base  = $R(0,2).map(function(i){ return parseInt(this.options.startcolor.slice(i*2+1,i*2+3),16) }.bind(this));
 497    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));
 498  },
 499  update: function(position) {
 500    this.element.setStyle({backgroundColor: $R(0,2).inject('#',function(m,v,i){
 501      return m+((this._base[i]+(this._delta[i]*position)).round().toColorPart()); }.bind(this)) });
 502  },
 503  finish: function() {
 504    this.element.setStyle(Object.extend(this.oldStyle, {
 505      backgroundColor: this.options.restorecolor
 506    }));
 507  }
 508});
 509
 510Effect.ScrollTo = function(element) {
 511  var options = arguments[1] || { },
 512    scrollOffsets = document.viewport.getScrollOffsets(),
 513    elementOffsets = $(element).cumulativeOffset(),
 514    max = (window.height || document.body.scrollHeight) - document.viewport.getHeight();  
 515
 516  if (options.offset) elementOffsets[1] += options.offset;
 517
 518  return new Effect.Tween(null,
 519    scrollOffsets.top,
 520    elementOffsets[1] > max ? max : elementOffsets[1],
 521    options,
 522    function(p){ scrollTo(scrollOffsets.left, p.round()) }
 523  );
 524};
 525
 526/* ------------- combination effects ------------- */
 527
 528Effect.Fade = function(element) {
 529  element = $(element);
 530  var oldOpacity = element.getInlineOpacity();
 531  var options = Object.extend({
 532    from: element.getOpacity() || 1.0,
 533    to:   0.0,
 534    afterFinishInternal: function(effect) { 
 535      if (effect.options.to!=0) return;
 536      effect.element.hide().setStyle({opacity: oldOpacity}); 
 537    }
 538  }, arguments[1] || { });
 539  return new Effect.Opacity(element,options);
 540};
 541
 542Effect.Appear = function(element) {
 543  element = $(element);
 544  var options = Object.extend({
 545  from: (element.getStyle('display') == 'none' ? 0.0 : element.getOpacity() || 0.0),
 546  to:   1.0,
 547  // force Safari to render floated elements properly
 548  afterFinishInternal: function(effect) {
 549    effect.element.forceRerendering();
 550  },
 551  beforeSetup: function(effect) {
 552    effect.element.setOpacity(effect.options.from).show(); 
 553  }}, arguments[1] || { });
 554  return new Effect.Opacity(element,options);
 555};
 556
 557Effect.Puff = function(element) {
 558  element = $(element);
 559  var oldStyle = { 
 560    opacity: element.getInlineOpacity(), 
 561    position: element.getStyle('position'),
 562    top:  element.style.top,
 563    left: element.style.left,
 564    width: element.style.width,
 565    height: element.style.height
 566  };
 567  return new Effect.Parallel(
 568   [ new Effect.Scale(element, 200, 
 569      { sync: true, scaleFromCenter: true, scaleContent: true, restoreAfterFinish: true }), 
 570     new Effect.Opacity(element, { sync: true, to: 0.0 } ) ], 
 571     Object.extend({ duration: 1.0, 
 572      beforeSetupInternal: function(effect) {
 573        Position.absolutize(effect.effects[0].element)
 574      },
 575      afterFinishInternal: function(effect) {
 576         effect.effects[0].element.hide().setStyle(oldStyle); }
 577     }, arguments[1] || { })
 578   );
 579};
 580
 581Effect.BlindUp = function(element) {
 582  element = $(element);
 583  element.makeClipping();
 584  return new Effect.Scale(element, 0,
 585    Object.extend({ scaleContent: false, 
 586      scaleX: false, 
 587      restoreAfterFinish: true,
 588      afterFinishInternal: function(effect) {
 589        effect.element.hide().undoClipping();
 590      } 
 591    }, arguments[1] || { })
 592  );
 593};
 594
 595Effect.BlindDown = function(element) {
 596  element = $(element);
 597  var elementDimensions = element.getDimensions();
 598  return new Effect.Scale(element, 100, Object.extend({ 
 599    scaleContent: false, 
 600    scaleX: false,
 601    scaleFrom: 0,
 602    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
 603    restoreAfterFinish: true,
 604    afterSetup: function(effect) {
 605      effect.element.makeClipping().setStyle({height: '0px'}).show(); 
 606    },  
 607    afterFinishInternal: function(effect) {
 608      effect.element.undoClipping();
 609    }
 610  }, arguments[1] || { }));
 611};
 612
 613Effect.SwitchOff = function(element) {
 614  element = $(element);
 615  var oldOpacity = element.getInlineOpacity();
 616  return new Effect.Appear(element, Object.extend({
 617    duration: 0.4,
 618    from: 0,
 619    transition: Effect.Transitions.flicker,
 620    afterFinishInternal: function(effect) {
 621      new Effect.Scale(effect.element, 1, { 
 622        duration: 0.3, scaleFromCenter: true,
 623        scaleX: false, scaleContent: false, restoreAfterFinish: true,
 624        beforeSetup: function(effect) { 
 625          effect.element.makePositioned().makeClipping();
 626        },
 627        afterFinishInternal: function(effect) {
 628          effect.element.hide().undoClipping().undoPositioned().setStyle({opacity: oldOpacity});
 629        }
 630      })
 631    }
 632  }, arguments[1] || { }));
 633};
 634
 635Effect.DropOut = function(element) {
 636  element = $(element);
 637  var oldStyle = {
 638    top: element.getStyle('top'),
 639    left: element.getStyle('left'),
 640    opacity: element.getInlineOpacity() };
 641  return new Effect.Parallel(
 642    [ new Effect.Move(element, {x: 0, y: 100, sync: true }), 
 643      new Effect.Opacity(element, { sync: true, to: 0.0 }) ],
 644    Object.extend(
 645      { duration: 0.5,
 646        beforeSetup: function(effect) {
 647          effect.effects[0].element.makePositioned(); 
 648        },
 649        afterFinishInternal: function(effect) {
 650          effect.effects[0].element.hide().undoPositioned().setStyle(oldStyle);
 651        } 
 652      }, arguments[1] || { }));
 653};
 654
 655Effect.Shake = function(element) {
 656  element = $(element);
 657  var options = Object.extend({
 658    distance: 20,
 659    duration: 0.5
 660  }, arguments[1] || {});
 661  var distance = parseFloat(options.distance);
 662  var split = parseFloat(options.duration) / 10.0;
 663  var oldStyle = {
 664    top: element.getStyle('top'),
 665    left: element.getStyle('left') };
 666    return new Effect.Move(element,
 667      { x:  distance, y: 0, duration: split, afterFinishInternal: function(effect) {
 668    new Effect.Move(effect.element,
 669      { x: -distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
 670    new Effect.Move(effect.element,
 671      { x:  distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
 672    new Effect.Move(effect.element,
 673      { x: -distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
 674    new Effect.Move(effect.element,
 675      { x:  distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
 676    new Effect.Move(effect.element,
 677      { x: -distance, y: 0, duration: split, afterFinishInternal: function(effect) {
 678        effect.element.undoPositioned().setStyle(oldStyle);
 679  }}) }}) }}) }}) }}) }});
 680};
 681
 682Effect.SlideDown = function(element) {
 683  element = $(element).cleanWhitespace();
 684  // SlideDown need to have the content of the element wrapped in a container element with fixed height!
 685  var oldInnerBottom = element.down().getStyle('bottom');
 686  var elementDimensions = element.getDimensions();
 687  return new Effect.Scale(element, 100, Object.extend({ 
 688    scaleContent: false, 
 689    scaleX: false, 
 690    scaleFrom: window.opera ? 0 : 1,
 691    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
 692    restoreAfterFinish: true,
 693    afterSetup: function(effect) {
 694      effect.element.makePositioned();
 695      effect.element.down().makePositioned();
 696      if (window.opera) effect.element.setStyle({top: ''});
 697      effect.element.makeClipping().setStyle({height: '0px'}).show(); 
 698    },
 699    afterUpdateInternal: function(effect) {
 700      effect.element.down().setStyle({bottom:
 701        (effect.dims[0] - effect.element.clientHeight) + 'px' }); 
 702    },
 703    afterFinishInternal: function(effect) {
 704      effect.element.undoClipping().undoPositioned();
 705      effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom}); }
 706    }, arguments[1] || { })
 707  );
 708};
 709
 710Effect.SlideUp = function(element) {
 711  element = $(element).cleanWhitespace();
 712  var oldInnerBottom = element.down().getStyle('bottom');
 713  var elementDimensions = element.getDimensions();
 714  return new Effect.Scale(element, window.opera ? 0 : 1,
 715   Object.extend({ scaleContent: false, 
 716    scaleX: false, 
 717    scaleMode: 'box',
 718    scaleFrom: 100,
 719    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
 720    restoreAfterFinish: true,
 721    afterSetup: function(effect) {
 722      effect.element.makePositioned();
 723      effect.element.down().makePositioned();
 724      if (window.opera) effect.element.setStyle({top: ''});
 725      effect.element.makeClipping().show();
 726    },  
 727    afterUpdateInternal: function(effect) {
 728      effect.element.down().setStyle({bottom:
 729        (effect.dims[0] - effect.element.clientHeight) + 'px' });
 730    },
 731    afterFinishInternal: function(effect) {
 732      effect.element.hide().undoClipping().undoPositioned();
 733      effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom});
 734    }
 735   }, arguments[1] || { })
 736  );
 737};
 738
 739// Bug in opera makes the TD containing this element expand for a instance after finish 
 740Effect.Squish = function(element) {
 741  return new Effect.Scale(element, window.opera ? 1 : 0, { 
 742    restoreAfterFinish: true,
 743    beforeSetup: function(effect) {
 744      effect.element.makeClipping(); 
 745    },  
 746    afterFinishInternal: function(effect) {
 747      effect.element.hide().undoClipping(); 
 748    }
 749  });
 750};
 751
 752Effect.Grow = function(element) {
 753  element = $(element);
 754  var options = Object.extend({
 755    direction: 'center',
 756    moveTransition: Effect.Transitions.sinoidal,
 757    scaleTransition: Effect.Transitions.sinoidal,
 758    opacityTransition: Effect.Transitions.full
 759  }, arguments[1] || { });
 760  var oldStyle = {
 761    top: element.style.top,
 762    left: element.style.left,
 763    height: element.style.height,
 764    width: element.style.width,
 765    opacity: element.getInlineOpacity() };
 766
 767  var dims = element.getDimensions();    
 768  var initialMoveX, initialMoveY;
 769  var moveX, moveY;
 770  
 771  switch (options.direction) {
 772    case 'top-left':
 773      initialMoveX = initialMoveY = moveX = moveY = 0; 
 774      break;
 775    case 'top-right':
 776      initialMoveX = dims.width;
 777      initialMoveY = moveY = 0;
 778      moveX = -dims.width;
 779      break;
 780    case 'bottom-left':
 781      initialMoveX = moveX = 0;
 782      initialMoveY = dims.height;
 783      moveY = -dims.height;
 784      break;
 785    case 'bottom-right':
 786      initialMoveX = dims.width;
 787      initialMoveY = dims.height;
 788      moveX = -dims.width;
 789      moveY = -dims.height;
 790      break;
 791    case 'center':
 792      initialMoveX = dims.width / 2;
 793      initialMoveY = dims.height / 2;
 794      moveX = -dims.width / 2;
 795      moveY = -dims.height / 2;
 796      break;
 797  }
 798  
 799  return new Effect.Move(element, {
 800    x: initialMoveX,
 801    y: initialMoveY,
 802    duration: 0.01, 
 803    beforeSetup: function(effect) {
 804      effect.element.hide().makeClipping().makePositioned();
 805    },
 806    afterFinishInternal: function(effect) {
 807      new Effect.Parallel(
 808        [ new Effect.Opacity(effect.element, { sync: true, to: 1.0, from: 0.0, transition: options.opacityTransition }),
 809          new Effect.Move(effect.element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition }),
 810          new Effect.Scale(effect.element, 100, {
 811            scaleMode: { originalHeight: dims.height, originalWidth: dims.width }, 
 812            sync: true, scaleFrom: window.opera ? 1 : 0, transition: options.scaleTransition, restoreAfterFinish: true})
 813        ], Object.extend({
 814             beforeSetup: function(effect) {
 815               effect.effects[0].element.setStyle({height: '0px'}).show(); 
 816             },
 817             afterFinishInternal: function(effect) {
 818               effect.effects[0].element.undoClipping().undoPositioned().setStyle(oldStyle); 
 819             }
 820           }, options)
 821      )
 822    }
 823  });
 824};
 825
 826Effect.Shrink = function(element) {
 827  element = $(element);
 828  var options = Object.extend({
 829    direction: 'center',
 830    moveTransition: Effect.Transitions.sinoidal,
 831    scaleTransition: Effect.Transitions.sinoidal,
 832    opacityTransition: Effect.Transitions.none
 833  }, arguments[1] || { });
 834  var oldStyle = {
 835    top: element.style.top,
 836    left: element.style.left,
 837    height: element.style.height,
 838    width: element.style.width,
 839    opacity: element.getInlineOpacity() };
 840
 841  var dims = element.getDimensions();
 842  var moveX, moveY;
 843  
 844  switch (options.direction) {
 845    case 'top-left':
 846      moveX = moveY = 0;
 847      break;
 848    case 'top-right':
 849      moveX = dims.width;
 850      moveY = 0;
 851      break;
 852    case 'bottom-left':
 853      moveX = 0;
 854      moveY = dims.height;
 855      break;
 856    case 'bottom-right':
 857      moveX = dims.width;
 858      moveY = dims.height;
 859      break;
 860    case 'center':  
 861      moveX = dims.width / 2;
 862      moveY = dims.height / 2;
 863      break;
 864  }
 865  
 866  return new Effect.Parallel(
 867    [ new Effect.Opacity(element, { sync: true, to: 0.0, from: 1.0, transition: options.opacityTransition }),
 868      new Effect.Scale(element, window.opera ? 1 : 0, { sync: true, transition: options.scaleTransition, restoreAfterFinish: true}),
 869      new Effect.Move(element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition })
 870    ], Object.extend({            
 871         beforeStartInternal: function(effect) {
 872           effect.effects[0].element.makePositioned().makeClipping(); 
 873         },
 874         afterFinishInternal: function(effect) {
 875           effect.effects[0].element.hide().undoClipping().undoPositioned().setStyle(oldStyle); }
 876       }, options)
 877  );
 878};
 879
 880Effect.Pulsate = function(element) {
 881  element = $(element);
 882  var options    = arguments[1] || { };
 883  var oldOpacity = element.getInlineOpacity();
 884  var transition = options.transition || Effect.Transitions.sinoidal;
 885  var reverser   = function(pos){ return transition(1-Effect.Transitions.pulse(pos, options.pulses)) };
 886  reverser.bind(transition);
 887  return new Effect.Opacity(element, 
 888    Object.extend(Object.extend({  duration: 2.0, from: 0,
 889      afterFinishInternal: function(effect) { effect.element.setStyle({opacity: oldOpacity}); }
 890    }, options), {transition: reverser}));
 891};
 892
 893Effect.Fold = function(element) {
 894  element = $(element);
 895  var oldStyle = {
 896    top: element.style.top,
 897    left: element.style.left,
 898    width: element.style.width,
 899    height: element.style.height };
 900  element.makeClipping();
 901  return new Effect.Scale(element, 5, Object.extend({   
 902    scaleContent: false,
 903    scaleX: false,
 904    afterFinishInternal: function(effect) {
 905    new Effect.Scale(element, 1, { 
 906      scaleContent: false, 
 907      scaleY: false,
 908      afterFinishInternal: function(effect) {
 909        effect.element.hide().undoClipping().setStyle(oldStyle);
 910      } });
 911  }}, arguments[1] || { }));
 912};
 913
 914Effect.Morph = Class.create(Effect.Base, {
 915  initialize: function(element) {
 916    this.element = $(element);
 917    if (!this.element) throw(Effect._elementDoesNotExistError);
 918    var options = Object.extend({
 919      style: { }
 920    }, arguments[1] || { });
 921    
 922    if (!Object.isString(options.style)) this.style = $H(options.style);
 923    else {
 924      if (options.style.include(':'))
 925        this.style = options.style.parseStyle();
 926      else {
 927        this.element.addClassName(options.style);
 928        this.style = $H(this.element.getStyles());
 929        this.element.removeClassName(options.style);
 930        var css = this.element.getStyles();
 931        this.style = this.style.reject(function(style) {
 932          return style.value == css[style.key];
 933        });
 934        options.afterFinishInternal = function(effect) {
 935          effect.element.addClassName(effect.options.style);
 936          effect.transforms.each(function(transform) {
 937            effect.element.style[transform.style] = '';
 938          });
 939        }
 940      }
 941    }
 942    this.start(options);
 943  },
 944  
 945  setup: function(){
 946    function parseColor(color){
 947      if (!color || ['rgba(0, 0, 0, 0)','transparent'].include(color)) color = '#ffffff';
 948      color = color.parseColor();
 949      return $R(0,2).map(function(i){
 950        return parseInt( color.slice(i*2+1,i*2+3), 16 ) 
 951      });
 952    }
 953    this.transforms = this.style.map(function(pair){
 954      var property = pair[0], value = pair[1], unit = null;
 955
 956      if (value.parseColor('#zzzzzz') != '#zzzzzz') {
 957        value = value.parseColor();
 958        unit  = 'color';
 959      } else if (property == 'opacity') {
 960        value = parseFloat(value);
 961        if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
 962          this.element.setStyle({zoom: 1});
 963      } else if (Element.CSS_LENGTH.test(value)) {
 964          var components = value.match(/^([\+\-]?[0-9\.]+)(.*)$/);
 965          value = parseFloat(components[1]);
 966          unit = (components.length == 3) ? components[2] : null;
 967      }
 968
 969      var originalValue = this.element.getStyle(property);
 970      return { 
 971        style: property.camelize(), 
 972        originalValue: unit=='color' ? parseColor(originalValue) : parseFloat(originalValue || 0), 
 973        targetValue: unit=='color' ? parseColor(value) : value,
 974        unit: unit
 975      };
 976    }.bind(this)).reject(function(transform){
 977      return (
 978        (transform.originalValue == transform.targetValue) ||
 979        (
 980          transform.unit != 'color' &&
 981          (isNaN(transform.originalValue) || isNaN(transform.targetValue))
 982        )
 983      )
 984    });
 985  },
 986  update: function(position) {
 987    var style = { }, transform, i = this.transforms.length;
 988    while(i--)
 989      style[(transform = this.transforms[i]).style] = 
 990        transform.unit=='color' ? '#'+
 991          (Math.round(transform.originalValue[0]+
 992            (transform.targetValue[0]-transform.originalValue[0])*position)).toColorPart() +
 993          (Math.round(transform.originalValue[1]+
 994            (transform.targetValue[1]-transform.originalValue[1])*position)).toColorPart() +
 995          (Math.round(transform.originalValue[2]+
 996            (transform.targetValue[2]-transform.originalValue[2])*position)).toColorPart() :
 997        (transform.originalValue +
 998          (transform.targetValue - transform.originalValue) * position).toFixed(3) + 
 999            (transform.unit === null ? '' : transform.unit);
1000    this.element.setStyle(style, true);
1001  }
1002});
1003
1004Effect.Transform = Class.create({
1005  initialize: function(tracks){
1006    this.tracks  = [];
1007    this.options = arguments[1] || { };
1008    this.addTracks(tracks);
1009  },
1010  addTracks: function(tracks){
1011    tracks.each(function(track){
1012      track = $H(track);
1013      var data = track.values().first();
1014      this.tracks.push($H({
1015        ids:     track.keys().first(),
1016        effect:  Effect.Morph,
1017        options: { style: data }
1018      }));
1019    }.bind(this));
1020    return this;
1021  },
1022  play: function(){
1023    return new Effect.Parallel(
1024      this.tracks.map(function(track){
1025        var ids = track.get('ids'), effect = track.get('effect'), options = track.get('options');
1026        var elements = [$(ids) || $$(ids)].flatten();
1027        return elements.map(function(e){ return new effect(e, Object.extend({ sync:true }, options)) });
1028      }).flatten(),
1029      this.options
1030    );
1031  }
1032});
1033
1034Element.CSS_PROPERTIES = $w(
1035  'backgroundColor backgroundPosition borderBottomColor borderBottomStyle ' + 
1036  'borderBottomWidth borderLeftColor borderLeftStyle borderLeftWidth ' +
1037  'borderRightColor borderRightStyle borderRightWidth borderSpacing ' +
1038  'borderTopColor borderTopStyle borderTopWidth bottom clip color ' +
1039  'fontSize fontWeight height left letterSpacing lineHeight ' +
1040  'marginBottom marginLeft marginRight marginTop markerOffset maxHeight '+
1041  'maxWidth minHeight minWidth opacity outlineColor outlineOffset ' +
1042  'outlineWidth paddingBottom paddingLeft paddingRight paddingTop ' +
1043  'right textIndent top width wordSpacing zIndex');
1044  
1045Element.CSS_LENGTH = /^(([\+\-]?[0-9\.]+)(em|ex|px|in|cm|mm|pt|pc|\%))|0$/;
1046
1047String.__parseStyleElement = document.createElement('div');
1048String.prototype.parseStyle = function(){
1049  var style, styleRules = $H();
1050  if (Prototype.Browser.WebKit)
1051    style = new Element('div',{style:this}).style;
1052  else {
1053    String.__parseStyleElement.innerHTML = '<div style="' + this + '"></div>';
1054    style = String.__parseStyleElement.childNodes[0].style;
1055  }
1056  
1057  Element.CSS_PROPERTIES.each(function(property){
1058    if (style[property]) styleRules.set(property, style[property]); 
1059  });
1060  
1061  if (Prototype.Browser.IE && this.include('opacity'))
1062    styleRules.set('opacity', this.match(/opacity:\s*((?:0|1)?(?:\.\d*)?)/)[1]);
1063
1064  return styleRules;
1065};
1066
1067if (document.defaultView && document.defaultView.getComputedStyle) {
1068  Element.getStyles = function(element) {
1069    var css = document.defaultView.getComputedStyle($(element), null);
1070    return Element.CSS_PROPERTIES.inject({ }, function(styles, property) {
1071      styles[property] = css[property];
1072      return styles;
1073    });
1074  };
1075} else {
1076  Element.getStyles = function(element) {
1077    element = $(element);
1078    var css = element.currentStyle, styles;
1079    styles = Element.CSS_PROPERTIES.inject({ }, function(results, property) {
1080      results[property] = css[property];
1081      return results;
1082    });
1083    if (!styles.opacity) styles.opacity = element.getOpacity();
1084    return styles;
1085  };
1086};
1087
1088Effect.Methods = {
1089  morph: function(element, style) {
1090    element = $(element);
1091    new Effect.Morph(element, Object.extend({ style: style }, arguments[2] || { }));
1092    return element;
1093  },
1094  visualEffect: function(element, effect, options) {
1095    element = $(element)
1096    var s = effect.dasherize().camelize(), klass = s.charAt(0).toUpperCase() + s.substring(1);
1097    new Effect[klass](element, options);
1098    return element;
1099  },
1100  highlight: function(element, options) {
1101    element = $(element);
1102    new Effect.Highlight(element, options);
1103    return element;
1104  }
1105};
1106
1107$w('fade appear grow shrink fold blindUp blindDown slideUp slideDown '+
1108  'pulsate shake puff squish switchOff dropOut').each(
1109  function(effect) { 
1110    Effect.Methods[effect] = function(element, options){
1111      element = $(element);
1112      Effect[effect.charAt(0).toUpperCase() + effect.substring(1)](element, options);
1113      return element;
1114    }
1115  }
1116);
1117
1118$w('getInlineOpacity forceRerendering setContentZoom collectTextNodes collectTextNodesIgnoreClass getStyles').each( 
1119  function(f) { Effect.Methods[f] = Element[f]; }
1120);
1121
1122Element.addMethods(Effect.Methods);