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

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

// Contributors:

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

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

//  Martin Bialasinki

//

// See scriptaculous.js for full license.

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

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

String.prototype.parseColor = function() {

  var color = '#';

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

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

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

  } else {

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

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

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

    }

  }

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

}

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

Element.collectTextNodes = function(element) {

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

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

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

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

}

Element.collectTextNodesIgnoreClass = function(element, className) {

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

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

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

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

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

}

Element.setContentZoom = function(element, percent) {

  element = $(element);

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

  if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);

}

Element.getOpacity = function(element){

  var opacity;

  if (opacity = Element.getStyle(element, 'opacity'))

    return parseFloat(opacity);

  if (opacity = (Element.getStyle(element, 'filter') || '').match(/alpha\(opacity=(.*)\)/))

    if(opacity[1]) return parseFloat(opacity[1]) / 100;

  return 1.0;

}

Element.setOpacity = function(element, value){

  element= $(element);

  if (value == 1){

    Element.setStyle(element, { opacity:

      (/Gecko/.test(navigator.userAgent) && !/Konqueror|Safari|KHTML/.test(navigator.userAgent)) ?

      0.999999 : 1.0 });

    if(/MSIE/.test(navigator.userAgent) && !window.opera)

      Element.setStyle(element, {filter: Element.getStyle(element,'filter').replace(/alpha\([^\)]*\)/gi,'')});

  } else {

    if(value < 0.00001) value = 0;

    Element.setStyle(element, {opacity: value});

    if(/MSIE/.test(navigator.userAgent) && !window.opera)

     Element.setStyle(element,

       { filter: Element.getStyle(element,'filter').replace(/alpha\([^\)]*\)/gi,'') +

                 'alpha(opacity='+value*100+')' });

  }

}

Element.getInlineOpacity = function(element){

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

}

Element.childrenWithClassName = function(element, className, findFirst) {

  var classNameRegExp = new RegExp("(^|\\s)" + className + "(\\s|$)");

  var results = $A($(element).getElementsByTagName('*'))[findFirst ? 'detect' : 'select']( function(c) {

    return (c.className && c.className.match(classNameRegExp));

  });

  if(!results) results = [];

  return results;

}

Element.forceRerendering = function(element) {

  try {

    element = $(element);

    var n = document.createTextNode(' ');

    element.appendChild(n);

    element.removeChild(n);

  } catch(e) { }

};

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

Array.prototype.call = function() {

  var args = arguments;

  this.each(function(f){ f.apply(this, args) });

}

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

var Effect = {

  _elementDoesNotExistError: {

    name: 'ElementDoesNotExistError',

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

  },

  tagifyText: function(element) {

    if(typeof Builder == 'undefined')

      throw("Effect.tagifyText requires including script.aculo.us' builder.js library");

    var tagifyStyle = 'position:relative';

    if(/MSIE/.test(navigator.userAgent) && !window.opera) tagifyStyle += ';zoom:1';

    element = $(element);

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

      if(child.nodeType==3) {

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

          element.insertBefore(

            Builder.node('span',{style: tagifyStyle},

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

              child);

        });

        Element.remove(child);

      }

    });

  },

  multiple: function(element, effect) {

    var elements;

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

        (typeof element == 'function')) &&

       (element.length))

      elements = element;

    else

      elements = $(element).childNodes;

    var options = Object.extend({

      speed: 0.1,

      delay: 0.0

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

    var masterDelay = options.delay;

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

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

    });

  },

  PAIRS: {

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

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

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

  },

  toggle: function(element, effect) {

    element = $(element);

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

    var options = Object.extend({

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

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

    Effect[element.visible() ?

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

  }

};

var Effect2 = Effect; // deprecated

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

Effect.Transitions = {}

Effect.Transitions.linear = Prototype.K;

Effect.Transitions.sinoidal = function(pos) {

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

}

Effect.Transitions.reverse  = function(pos) {

  return 1-pos;

}

Effect.Transitions.flicker = function(pos) {

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

}

Effect.Transitions.wobble = function(pos) {

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

}

Effect.Transitions.pulse = function(pos) {

  return (Math.floor(pos*10) % 2 == 0 ?

    (pos*10-Math.floor(pos*10)) : 1-(pos*10-Math.floor(pos*10)));

}

Effect.Transitions.none = function(pos) {

  return 0;

}

Effect.Transitions.full = function(pos) {

  return 1;

}

Effect.Transitions.exponential = function(pos) {

  return 1-Math.pow(1-pos,2);

}

Effect.Transitions.slowstop = function(pos) {

  return 1-Math.pow(0.5,20*pos);

}

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

Effect.ScopedQueue = Class.create();

Object.extend(Object.extend(Effect.ScopedQueue.prototype, Enumerable), {

  initialize: function() {

    this.effects  = [];

    this.interval = null;

  },

  _each: function(iterator) {

    this.effects._each(iterator);

  },

  add: function(effect) {

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

    var position = (typeof effect.options.queue == 'string') ?

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

    switch(position) {

      case 'front':

        // move unstarted effects after this effect

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

            e.startOn  += effect.finishOn;

            e.finishOn += effect.finishOn;

          });

        break;

      case 'end':

        // start effect after last queued effect has finished

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

        break;

    }

    effect.startOn  += timestamp;

    effect.finishOn += timestamp;

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

      this.effects.push(effect);

    if(!this.interval)

      this.interval = setInterval(this.loop.bind(this), 40);

  },

  remove: function(effect) {

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

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

      clearInterval(this.interval);

      this.interval = null;

    }

  },

  loop: function() {

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

    this.effects.invoke('loop', timePos);

  }

});

Effect.Queues = {

  instances: $H(),

  get: function(queueName) {

    if(typeof queueName != 'string') return queueName;

    if(!this.instances[queueName])

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

    return this.instances[queueName];

  }

}

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

Effect.DefaultOptions = {

  transition: Effect.Transitions.sinoidal,

  duration:   1.0,   // seconds

  fps:        25.0,  // max. 25fps due to Effect.Queue implementation

  sync:       false, // true for combining

  from:       0.0,

  to:         1.0,

  delay:      0.0,

  queue:      'parallel'

}

Effect.Base = function() {};

Effect.Base.prototype = {

  position: null,

  start: function(options) {

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

    this.currentFrame = 0;

    this.state        = 'idle';

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

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

    this.event('beforeStart');

    if(!this.options.sync)

      Effect.Queues.get(typeof this.options.queue == 'string' ?

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

  },

  loop: function(timePos) {

    if(timePos >= this.startOn) {

      if(timePos >= this.finishOn) {

        this.render(1.0);

        this.cancel();

        this.event('beforeFinish');

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

        this.event('afterFinish');

        return;

      }

      var pos   = (timePos - this.startOn) / (this.finishOn - this.startOn);

      var frame = Math.round(pos * this.options.fps * this.options.duration);

      if(frame > this.currentFrame) {

        this.render(pos);

        this.currentFrame = frame;

      }

    }

  },

  render: function(pos) {

    if(this.state == 'idle') {

      this.state = 'running';

      this.event('beforeSetup');

      if(this.setup) this.setup();

      this.event('afterSetup');

    }

    if(this.state == 'running') {

      if(this.options.transition) pos = this.options.transition(pos);

      pos *= (this.options.to-this.options.from);

      pos += this.options.from;

      this.position = pos;

      this.event('beforeUpdate');

      if(this.update) this.update(pos);

      this.event('afterUpdate');

    }

  },