events.js

来自「Hippo CMS是一个以信息为中心的开源内容管理系统。Hippo CMS目标是」· JavaScript 代码 · 共 108 行

/*
* Copyright 2001-2007 Hippo (www.hippo.nl)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function EventManager() {

  if ( !Cfx.Class.IsDefined( EventManager ) ) {
    Cfx.Class.New( EventManager, baseComponent );
    if ( Cfx.Class.IsInitializing( EventManager ) )	{
      EventManager.Method( init );
      EventManager.Method( addEventListener );
      EventManager.Method( removeEventListener );
      EventManager.Method( fireEvent );
      EventManager.Method( executeDelayedEvents );
      return;
    }
  }

  this.InitInstance();

  this.listeners = new Array();
  this.delayedEvents = new QueueAsArray(10);
  
  return this;

  function init(){
    if (this.log.debugging()) {
      this.log.debug("initializing EventManager");
    }
  }

  function addEventListener(obj) {
    this.listeners.push(obj); 
  }
  
  function removeEventListener(obj) {
    this.listeners.pop(obj); 
  }
  
  function fireEvent(evt, params) {
    if (this.log.debugging()) {
      this.log.debug("Firing event: " + evt);
    }
	
	if(this.sm.lookup("framework.authenticationmanager").isConnected()){
      for (var i=0; i<this.listeners.length; i++) {
	    var func = this.listeners[i][evt];
	    if (func != undefined) {
	  	  if (this.log.debugging()) {
	        this.log.debug("notifying object '" + this.listeners[i].getId() + "' of event " + evt);
	      }
	      func.call(this.listeners[i], params);
	    }
	  }	  
	}else{
	  if (this.log.debugging()) {
        this.log.debug("Delaying event: " + evt);
      }
	
	  var _this = this;
      this.delayedEvents.enqueue(new DelayedEvent(evt, params));
	  this.sm.lookup("framework.authenticationmanager").reconnect();		
	}
  }

  function executeDelayedEvents() {
    if(!this.delayedEvents.isEmpty()) {
      try{
        var evt = this.delayedEvents.dequeue();
        this.log.debug(evt.event + " - " + evt.args);
        this.fireEvent(evt.event, evt.args);
	      
        //TODO: implement recursion
		//this.executeDelayedEvents();
      }catch(e){
        this.log.error("executeDelayedEvents()", e)
      }  
    }
  }
}


function DelayedEvent() {
  if ( !Cfx.Class.IsDefined( DelayedEvent ) ) {
    Cfx.Class.New( DelayedEvent );
    if ( Cfx.Class.IsInitializing( DelayedEvent ) )	{
      return;
    }
  }
  this.InitInstance();

  if(arguments.length) {
    this.event = arguments[0];
    this.args= arguments[1];
  }
  return this;
}