AJAX页面状态保持思路详解

/
  URL Watcher(require jQuery)
  监测url的变化
  useage:
  UrlWatcher.init(50);
  UrlWatcher.AddListener(function(url,isFirstLoad){
     FrontEngine.generateFront();
  });
 
 /
var UrlWatcher = {
  "init": function (waittime) {
    this.UrlArray = [window.location.href];//set current url as default
    this.ListenerArray = [];
    this.ResetWaitTime(waittime);
  },
  "AddListener": function (listener) {//add a process function
    this.ListenerArray.push(listener || function () {});
  },
  "DeleteListener": function () {
    this.ListenerArray = [];
  },
  "ResetWaitTime": function (time) {//start timer
    if (this.IntervalHandle) {window.clearInterval(this.IntervalHandle); }
    this.WaitTime = time || 1000;
    this.IntervalHandle = window.setInterval(this.ListenerCall.setThis(this), this.WaitTime);
  },
  "ListenerCall": function () {
    var self = this, url = window.location.href;
    if (self.UrlArray[self.UrlArray.length - 1] === url) {return; }
    window.clearInterval(this.IntervalHandle);
    $.each(this.ListenerArray, function (c, listener) {
      listener(url, self.UrlArray.length === 0);
    });
    this.UrlArray.push(url);
    this.ResetWaitTime(this.WaitTime);
  }
};

if( ('onhashchange' in window) && ((typeof document.documentMode==='undefined') || document.documentMode==8))
{   // 浏览器支持onhashchange事件   
indow.onhashchange = hashChangeFire; // TODO，对应新的hash执行的操作函数
} 
else 
{   // 不支持则用定时器检测的办法   
setInterval(function() {     
var ischanged = isHashChanged(); // TODO，检测hash值或其中某一段是否更改的函数    
if(ischanged)
{       
hashChangeFire(); // TODO，对应新的hash执行的操作函数    
}  
},
150);
}