/** * @author Ryan Johnson <http://syntacticx.com/> * @copyright 2008 PersonalGrid Corporation <http://personalgrid.com/> * @package LivePipe UI * @license MIT * @url http://livepipe.net/core * @require prototype.js */ if(typeof(Control) == 'undefined')  Control = {};  var $proc = function(proc){  return typeof(proc) == 'function' ? proc : function(){return proc};}; var $value = function(value){  return typeof(value) == 'function' ? value() : value;}; Object.Event = {  extend: function(object){    object._objectEventSetup = function(event_name){      this._observers = this._observers || {};      this._observers[event_name] = this._observers[event_name] || [];    };    object.observe = function(event_name,observer){      if(typeof(event_name) == 'string' && typeof(observer) != 'undefined'){        this._objectEventSetup(event_name);        if(!this._observers[event_name].include(observer))          this._observers[event_name].push(observer);      }else        for(var e in event_name)          this.observe(e,event_name[e]);    };    object.stopObserving = function(event_name,observer){      this._objectEventSetup(event_name);      if(event_name && observer)        this._observers[event_name] = this._observers[event_name].without(observer);      else if(event_name)        this._observers[event_name] = [];      else        this._observers = {};    };    object.observeOnce = function(event_name,outer_observer){      var inner_observer = function(){        outer_observer.apply(this,arguments);        this.stopObserving(event_name,inner_observer);      }.bind(this);      this._objectEventSetup(event_name);      this._observers[event_name].push(inner_observer);    };    object.notify = function(event_name){      this._objectEventSetup(event_name);      var collected_return_values = [];      var args = $A(arguments).slice(1);      try{        for(var i = 0; i < this._observers[event_name].length; ++i)          collected_return_values.push(this._observers[event_name][i].apply(this._observers[event_name][i],args) || null);      }catch(e){        if(e == $break)          return false;        else          throw e;      }      return collected_return_values;    };    if(object.prototype){      object.prototype._objectEventSetup = object._objectEventSetup;      object.prototype.observe = object.observe;      object.prototype.stopObserving = object.stopObserving;      object.prototype.observeOnce = object.observeOnce;      object.prototype.notify = function(event_name){        if(object.notify){          var args = $A(arguments).slice(1);          args.unshift(this);          args.unshift(event_name);          object.notify.apply(object,args);        }        this._objectEventSetup(event_name);        var args = $A(arguments).slice(1);        var collected_return_values = [];        try{          if(this.options && this.options[event_name] && typeof(this.options[event_name]) == 'function')            collected_return_values.push(this.options[event_name].apply(this,args) || null);          for(var i = 0; i < this._observers[event_name].length; ++i)            collected_return_values.push(this._observers[event_name][i].apply(this._observers[event_name][i],args) || null);        }catch(e){          if(e == $break)            return false;          else            throw e;        }        return collected_return_values;      };    }  }}; /* Begin Core Extensions */ //Element.observeOnceElement.addMethods({  observeOnce: function(element,event_name,outer_callback){    var inner_callback = function(){      outer_callback.apply(this,arguments);      Element.stopObserving(element,event_name,inner_callback);    };    Element.observe(element,event_name,inner_callback);  }}); //mouseenter, mouseleave//from http://dev.rubyonrails.org/attachment/ticket/8354/event_mouseenter_106rc1.patchObject.extend(Event, (function() {  var cache = Event.cache;   function getEventID(element) {    if (element._prototypeEventID) return element._prototypeEventID[0];    arguments.callee.id = arguments.callee.id || 1;    return element._prototypeEventID = [++arguments.callee.id];  }   function getDOMEventName(eventName) {    if (eventName && eventName.include(':')) return "dataavailable";    //begin extension    if(!Prototype.Browser.IE){      eventName = {        mouseenter: 'mouseover',        mouseleave: 'mouseout'      }[eventName] || eventName;    }    //end extension    return eventName;  }   function getCacheForID(id) {    return cache[id] = cache[id] || { };  }   function getWrappersForEventName(id, eventName) {    var c = getCacheForID(id);    return c[eventName] = c[eventName] || [];  }   function createWrapper(element, eventName, handler) {    var id = getEventID(element);    var c = getWrappersForEventName(id, eventName);    if (c.pluck("handler").include(handler)) return false;     var wrapper = function(event) {      if (!Event || !Event.extend ||        (event.eventName && event.eventName != eventName))          return false;       Event.extend(event);      handler.call(element, event);    };        //begin extension    if(!(Prototype.Browser.IE) && ['mouseenter','mouseleave'].include(eventName)){      wrapper = wrapper.wrap(function(proceed,event) {          var rel = event.relatedTarget;        var cur = event.currentTarget;               if(rel && rel.nodeType == Node.TEXT_NODE)          rel = rel.parentNode;            if(rel && rel != cur && !rel.descendantOf(cur))              return proceed(event);         });       }    //end extension     wrapper.handler = handler;    c.push(wrapper);    return wrapper;  }   function findWrapper(id, eventName, handler) {    var c = getWrappersForEventName(id, eventName);    return c.find(function(wrapper) { return wrapper.handler == handler });  }   function destroyWrapper(id, eventName, handler) {    var c = getCacheForID(id);    if (!c[eventName]) return false;    c[eventName] = c[eventName].without(findWrapper(id, eventName, handler));  }   function destroyCache() {    for (var id in cache)      for (var eventName in cache[id])        cache[id][eventName] = null;  }   if (window.attachEvent) {    window.attachEvent("onunload", destroyCache);  }   return {    observe: function(element, eventName, handler) {      element = $(element);      var name = getDOMEventName(eventName);       var wrapper = createWrapper(element, eventName, handler);      if (!wrapper) return element;       if (element.addEventListener) {        element.addEventListener(name, wrapper, false);      } else {        element.attachEvent("on" + name, wrapper);      }       return element;    },     stopObserving: function(element, eventName, handler) {      element = $(element);      var id = getEventID(element), name = getDOMEventName(eventName);       if (!handler && eventName) {        getWrappersForEventName(id, eventName).each(function(wrapper) {          element.stopObserving(eventName, wrapper.handler);        });        return element;       } else if (!eventName) {        Object.keys(getCacheForID(id)).each(function(eventName) {          element.stopObserving(eventName);        });        return element;      }       var wrapper = findWrapper(id, eventName, handler);      if (!wrapper) return element;       if (element.removeEventListener) {        element.removeEventListener(name, wrapper, false);      } else {        element.detachEvent("on" + name, wrapper);      }       destroyWrapper(id, eventName, handler);       return element;    },     fire: function(element, eventName, memo) {      element = $(element);      if (element == document && document.createEvent && !element.dispatchEvent)        element = document.documentElement;       var event;      if (document.createEvent) {        event = document.createEvent("HTMLEvents");        event.initEvent("dataavailable", true, true);      } else {        event = document.createEventObject();        event.eventType = "ondataavailable";      }       event.eventName = eventName;      event.memo = memo || { };       if (document.createEvent) {        element.dispatchEvent(event);      } else {        element.fireEvent(event.eventType, event);      }       return Event.extend(event);    }  };})()); Object.extend(Event, Event.Methods); Element.addMethods({  fire:      Event.fire,  observe:    Event.observe,  stopObserving:  Event.stopObserving}); Object.extend(document, {  fire:      Element.Methods.fire.methodize(),  observe:    Element.Methods.observe.methodize(),  stopObserving:  Element.Methods.stopObserving.methodize()}); //mouse:wheel(function(){  function wheel(event){    var delta;    // normalize the delta    if(event.wheelDelta) // IE & Opera      delta = event.wheelDelta / 120;    else if (event.detail) // W3C      delta =- event.detail / 3;    if(!delta)      return;    var custom_event = event.element().fire('mouse:wheel',{      delta: delta    });    if(custom_event.stopped){      event.stop();      return false;    }  }  document.observe('mousewheel',wheel);  document.observe('DOMMouseScroll',wheel);})(); /* End Core Extensions */ //from PrototypeUIvar IframeShim = Class.create({  initialize: function() {    this.element = new Element('iframe',{      style: 'position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);display:none',      src: 'javascript:void(0);',      frameborder: 0     });    $(document.body).insert(this.element);  },  hide: function() {    this.element.hide();    return this;  },  show: function() {    this.element.show();    return this;  },  positionUnder: function(element) {    var element = $(element);    var offset = element.cumulativeOffset();    var dimensions = element.getDimensions();    this.element.setStyle({      left: offset[0] + 'px',      top: offset[1] + 'px',      width: dimensions.width + 'px',      height: dimensions.height + 'px',      zIndex: element.getStyle('zIndex') - 1    }).show();    return this;  },  setBounds: function(bounds) {    for(prop in bounds)      bounds[prop] += 'px';    this.element.setStyle(bounds);    return this;  },  destroy: function() {    if(this.element)      this.element.remove();    return this;  }});