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

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// Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)

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// Contributors:

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//  Justin Palmer (http://encytemedia.com/)

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//  Mark Pilgrim (http://diveintomark.org/)

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//  Martin Bialasinki

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// 

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// script.aculo.us is freely distributable under the terms of an MIT-style license.

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// For details, see the script.aculo.us web site: http://script.aculo.us/ 

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// converts rgb() and #xxx to #xxxxxx format,  

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// returns self (or first argument) if not convertable  

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String.prototype.parseColor = function() {  

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  var color = '#';

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  if (this.slice(0,4) == 'rgb(') {  

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    var cols = this.slice(4,this.length-1).split(',');  

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    var i=0; do { color += parseInt(cols[i]).toColorPart() } while (++i<3);  

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  } else {  

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    if (this.slice(0,1) == '#') {  

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      if (this.length==4) for(var i=1;i<4;i++) color += (this.charAt(i) + this.charAt(i)).toLowerCase();  

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      if (this.length==7) color = this.toLowerCase();  

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    }  

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  }  

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  return (color.length==7 ? color : (arguments[0] || this));  

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};

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

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Element.collectTextNodes = function(element) {  

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  return $A($(element).childNodes).collect( function(node) {

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    return (node.nodeType==3 ? node.nodeValue : 

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      (node.hasChildNodes() ? Element.collectTextNodes(node) : ''));

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  }).flatten().join('');

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};

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Element.collectTextNodesIgnoreClass = function(element, className) {  

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  return $A($(element).childNodes).collect( function(node) {

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    return (node.nodeType==3 ? node.nodeValue : 

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      ((node.hasChildNodes() && !Element.hasClassName(node,className)) ? 

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        Element.collectTextNodesIgnoreClass(node, className) : ''));

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  }).flatten().join('');

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};

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Element.setContentZoom = function(element, percent) {

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  element = $(element);  

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  element.setStyle({fontSize: (percent/100) + 'em'});   

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  if (Prototype.Browser.WebKit) window.scrollBy(0,0);

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  return element;

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};

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Element.getInlineOpacity = function(element){

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  return $(element).style.opacity || '';

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};

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Element.forceRerendering = function(element) {

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  try {

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    element = $(element);

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    var n = document.createTextNode(' ');

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    element.appendChild(n);

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    element.removeChild(n);

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  } catch(e) { }

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};

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

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var Effect = {

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  _elementDoesNotExistError: {

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    name: 'ElementDoesNotExistError',

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    message: 'The specified DOM element does not exist, but is required for this effect to operate'

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  },

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  Transitions: {

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    linear: Prototype.K,

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    sinoidal: function(pos) {

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      return (-Math.cos(pos*Math.PI)/2) + 0.5;

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    },

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    reverse: function(pos) {

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      return 1-pos;

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    },

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    flicker: function(pos) {

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      var pos = ((-Math.cos(pos*Math.PI)/4) + 0.75) + Math.random()/4;

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      return pos > 1 ? 1 : pos;

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    },

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    wobble: function(pos) {

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      return (-Math.cos(pos*Math.PI*(9*pos))/2) + 0.5;

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    },

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    pulse: function(pos, pulses) { 

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      pulses = pulses || 5; 

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      return (

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        ((pos % (1/pulses)) * pulses).round() == 0 ? 

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              ((pos * pulses * 2) - (pos * pulses * 2).floor()) : 

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          1 - ((pos * pulses * 2) - (pos * pulses * 2).floor())

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        );

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    },

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    spring: function(pos) { 

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      return 1 - (Math.cos(pos * 4.5 * Math.PI) * Math.exp(-pos * 6)); 

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    },

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    none: function(pos) {

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      return 0;

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    },

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    full: function(pos) {

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      return 1;

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    }

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  },

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  DefaultOptions: {

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    duration:   1.0,   // seconds

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    fps:        100,   // 100= assume 66fps max.

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    sync:       false, // true for combining

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    from:       0.0,

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    to:         1.0,

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    delay:      0.0,

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    queue:      'parallel'

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  },

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  tagifyText: function(element) {

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    var tagifyStyle = 'position:relative';

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    if (Prototype.Browser.IE) tagifyStyle += ';zoom:1';

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    element = $(element);

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    $A(element.childNodes).each( function(child) {

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      if (child.nodeType==3) {

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        child.nodeValue.toArray().each( function(character) {

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          element.insertBefore(

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            new Element('span', {style: tagifyStyle}).update(

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              character == ' ' ? String.fromCharCode(160) : character), 

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              child);

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        });

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        Element.remove(child);

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      }

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    });

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  },

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  multiple: function(element, effect) {

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    var elements;

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    if (((typeof element == 'object') || 

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        Object.isFunction(element)) && 

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       (element.length))

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      elements = element;

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    else

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      elements = $(element).childNodes;

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    var options = Object.extend({

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      speed: 0.1,

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      delay: 0.0

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    }, arguments[2] || { });

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    var masterDelay = options.delay;

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    $A(elements).each( function(element, index) {

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      new effect(element, Object.extend(options, { delay: index * options.speed + masterDelay }));

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    });

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  },

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  PAIRS: {

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    'slide':  ['SlideDown','SlideUp'],

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    'blind':  ['BlindDown','BlindUp'],

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    'appear': ['Appear','Fade']

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  },

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  toggle: function(element, effect) {

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    element = $(element);

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    effect = (effect || 'appear').toLowerCase();

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    var options = Object.extend({

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      queue: { position:'end', scope:(element.id || 'global'), limit: 1 }

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    }, arguments[2] || { });

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    Effect[element.visible() ? 

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      Effect.PAIRS[effect][1] : Effect.PAIRS[effect][0]](element, options);

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  }

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};

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

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

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Effect.ScopedQueue = Class.create(Enumerable, {

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  initialize: function() {

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    this.effects  = [];

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    this.interval = null;    

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  },

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  _each: function(iterator) {

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    this.effects._each(iterator);

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  },

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  add: function(effect) {

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    var timestamp = new Date().getTime();

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

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      effect.options.queue : effect.options.queue.position;

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    switch(position) {

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      case 'front':

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        // move unstarted effects after this effect  

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        this.effects.findAll(function(e){ return e.state=='idle' }).each( function(e) {

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            e.startOn  += effect.finishOn;

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            e.finishOn += effect.finishOn;

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          });

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        break;

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      case 'with-last':

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        timestamp = this.effects.pluck('startOn').max() || timestamp;

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        break;

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      case 'end':

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        // start effect after last queued effect has finished

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        timestamp = this.effects.pluck('finishOn').max() || timestamp;

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        break;

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    }

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    effect.startOn  += timestamp;

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    effect.finishOn += timestamp;

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

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      this.effects.push(effect);

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    if (!this.interval)

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      this.interval = setInterval(this.loop.bind(this), 15);

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  },

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  remove: function(effect) {

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    this.effects = this.effects.reject(function(e) { return e==effect });

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    if (this.effects.length == 0) {

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      clearInterval(this.interval);

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      this.interval = null;

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    }

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  },

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  loop: function() {

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    var timePos = new Date().getTime();

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    for(var i=0, len=this.effects.length;i<len;i++) 

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      this.effects[i] && this.effects[i].loop(timePos);

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  }

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});

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Effect.Queues = {

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  instances: $H(),

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  get: function(queueName) {

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    if (!Object.isString(queueName)) return queueName;

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    return this.instances.get(queueName) ||

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      this.instances.set(queueName, new Effect.ScopedQueue());

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  }

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};

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Effect.Queue = Effect.Queues.get('global');

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Effect.Base = Class.create({

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  position: null,

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  start: function(options) {

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    function codeForEvent(options,eventName){

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      return (

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        (options[eventName+'Internal'] ? 'this.options.'+eventName+'Internal(this);' : '') +

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        (options[eventName] ? 'this.options.'+eventName+'(this);' : '')

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      );

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    }

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    if (options && options.transition === false) options.transition = Effect.Transitions.linear;

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    this.options      = Object.extend(Object.extend({ },Effect.DefaultOptions), options || { });

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    this.currentFrame = 0;

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    this.state        = 'idle';

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    this.startOn      = this.options.delay*1000;

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    this.finishOn     = this.startOn+(this.options.duration*1000);

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    this.fromToDelta  = this.options.to-this.options.from;

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    this.totalTime    = this.finishOn-this.startOn;

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    this.totalFrames  = this.options.fps*this.options.duration;

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    eval('this.render = function(pos){ '+

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      'if (this.state=="idle"){this.state="running";'+

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      codeForEvent(this.options,'beforeSetup')+

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      (this.setup ? 'this.setup();':'')+ 

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      codeForEvent(this.options,'afterSetup')+

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      '};if (this.state=="running"){'+

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      'pos=this.options.transition(pos)*'+this.fromToDelta+'+'+this.options.from+';'+

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      'this.position=pos;'+

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      codeForEvent(this.options,'beforeUpdate')+

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      (this.update ? 'this.update(pos);':'')+

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      codeForEvent(this.options,'afterUpdate')+

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      '}}');

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    this.event('beforeStart');

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    if (!this.options.sync)

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      Effect.Queues.get(Object.isString(this.options.queue) ? 

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        'global' : this.options.queue.scope).add(this);

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  },

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  loop: function(timePos) {

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    if (timePos >= this.startOn) {

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      if (timePos >= this.finishOn) {

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        this.render(1.0);

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        this.cancel();

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        this.event('beforeFinish');

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        if (this.finish) this.finish(); 

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        this.event('afterFinish');

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        return;  

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      }

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      var pos   = (timePos - this.startOn) / this.totalTime,

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          frame = (pos * this.totalFrames).round();

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      if (frame > this.currentFrame) {

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        this.render(pos);

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        this.currentFrame = frame;

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      }

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    }

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  },

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  cancel: function() {

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    if (!this.options.sync)

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      Effect.Queues.get(Object.isString(this.options.queue) ? 

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        'global' : this.options.queue.scope).remove(this);

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    this.state = 'finished';

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  },

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  event: function(eventName) {

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    if (this.options[eventName + 'Internal']) this.options[eventName + 'Internal'](this);

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    if (this.options[eventName]) this.options[eventName](this);

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  },

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  inspect: function() {

   301

    var data = $H();

   302

    for(property in this)

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      if (!Object.isFunction(this[property])) data.set(property, this[property]);

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    return '#<Effect:' + data.inspect() + ',options:' + $H(this.options).inspect() + '>';

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  }

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});

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Effect.Parallel = Class.create(Effect.Base, {

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  initialize: function(effects) {

   310

    this.effects = effects || [];

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    this.start(arguments[1]);

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  },

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  update: function(position) {

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    this.effects.invoke('render', position);

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  },

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  finish: function(position) {

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    this.effects.each( function(effect) {

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      effect.render(1.0);

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      effect.cancel();

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      effect.event('beforeFinish');

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      if (effect.finish) effect.finish(position);

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      effect.event('afterFinish');

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    });

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  }

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});

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Effect.Tween = Class.create(Effect.Base, {

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  initialize: function(object, from, to) {

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    object = Object.isString(object) ? $(object) : object;

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    var args = $A(arguments), method = args.last(), 

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      options = args.length == 5 ? args[3] : null;

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    this.method = Object.isFunction(method) ? method.bind(object) :

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      Object.isFunction(object[method]) ? object[method].bind(object) : 

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      function(value) { object[method] = value };

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    this.start(Object.extend({ from: from, to: to }, options || { }));

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  },

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  update: function(position) {

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    this.method(position);

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  }

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});

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Effect.Event = Class.create(Effect.Base, {

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  initialize: function() {

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    this.start(Object.extend({ duration: 0 }, arguments[0] || { }));

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  },

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  update: Prototype.emptyFunction

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});

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Effect.Opacity = Class.create(Effect.Base, {

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  initialize: function(element) {

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    this.element = $(element);

   352

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

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    // make this work on IE on elements without 'layout'

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    if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))

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      this.element.setStyle({zoom: 1});

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    var options = Object.extend({

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      from: this.element.getOpacity() || 0.0,

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      to:   1.0

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    }, arguments[1] || { });

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    this.start(options);

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  },

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  update: function(position) {

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    this.element.setOpacity(position);

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  }

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});

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Effect.Move = Class.create(Effect.Base, {

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  initialize: function(element) {

   369

    this.element = $(element);

   370

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

   371

    var options = Object.extend({

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      x:    0,

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      y:    0,

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      mode: 'relative'

   375

    }, arguments[1] || { });

   376

    this.start(options);

   377

  },

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  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

  },

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  update: function(position) {

   388

    this.element.setStyle({

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      left: (this.options.x  * position + this.originalLeft).round() + 'px',

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      top:  (this.options.y  * position + this.originalTop).round()  + 'px'

   391

    });

   392

  }

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});

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// for backwards compatibility

   396

Effect.MoveBy = function(element, toTop, toLeft) {

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  return new Effect.Move(element, 

   398

    Object.extend({ x: toLeft, y: toTop }, arguments[3] || { }));

   399

};

   400

   401

Effect.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,

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      scaleContent: true,

   409

      scaleFromCenter: false,

   410

      scaleMode: 'box',        // 'box' or 'contents' or { } with provided values

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      scaleFrom: 100.0,

   412

      scaleTo:   percent

   413

    }, arguments[2] || { });

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    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

   475

Effect.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

   510

Effect.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

   528

Effect.Fade = function(element) {

   529

  element = $(element);

   530

  var oldOpacity = element.getInlineOpacity();