var folderListener = {

    OnItemIntPropertyChanged: function(item, property, oldValue, newValue) {
      if (item == gMsgFolderSelected) {
        if(property.toString() == "TotalMessages" || property.toString() == "TotalUnreadMessages") {
            
          
          UpdateStatusMessageCounts(gMsgFolderSelected);
         
          UpdateFolderLocationPicker(item);
//***************************************************************************
//Author: phinecos
//Date : 2008/5/8
//Description:自动保存邮件到指定文件夹下
//Contact:phinecos@163.com
//***************************************************************************
          if(property.toString()=="TotalMessages" && newValue>oldValue){//保存邮件到指定文件夹下
                if(messenger!=null && gDBView!=null){
                 try{
                     SaveAllMessages(saveFolderName);
                  }
                  catch(err){
                  }
              }
          }
        }      
      }
    },
//***************************************************************************
//Author: phinecos
//Date : 2008/5/8
//Description:保存所有邮件
//Contact:phinecos@163.com
//***************************************************************************
function SaveAllMessages(folerName)
{//保存所有邮件,folerName是文件夹名称
    if(gDBView==null)
    {//gDBView是空的
        return;
    }
    var treeView = gDBView.QueryInterface(Components.interfaces.nsITreeView);
    var count = treeView.rowCount;    
    if (!count)
        return;
    gDBView.doCommand(nsMsgViewCommandType.expandAll);//展开所有的邮件
    var messageUri;
    var msgKey = null;
    for (var i = 0; i < count; ++i)
    {//保存第i个邮件
        try 
        {
              messageUri = gDBView.getURIForViewIndex(i);//邮件Uri
            msgKey = gDBView.getKeyAt(i);//邮件key
            
            try
            {
                gDBView.loadMessageByMsgKey(msgKey);//加载邮件
            }
            catch(err)
            {
                alert("sory");
            }
            var msgHdr = messenger.messageServiceFromURI(messageUri).messageURIToMsgHdr(messageUri);
            var result  = true;
            result = msgHdr.folder.hasMsgOffline(msgHdr.messageKey);
            if(result==false)
            {//本地数据源中读取邮件
                readOffline(msgHdr,messageUri,folerName);
            }
            else
            {//从服务器上读邮件
                //to be do future
            }            
        }
        catch (ex) 
        {// blow off errors for dummy rows
            continue;
        } 
    }
}

gDBView.loadMessageByMsgKey(msgKey);//加载邮件

        handleAttachment: function(contentType, url, displayName, uri, isExternalAttachment) 
    {
        ….(省略)
        //保存当前邮件的附件信息
      var currentAttachment = new createNewAttachmentInfo(contentType, url, displayName, uri, isExternalAttachment);
….(省略)
//      
//***************************************************************************
//Author: phinecos
//Date : 2008/5/17
//Description:保存附件
//Contact:phinecos@163.com
//***************************************************************************
   var actionIndex = 0;
//   for (index in currentAttachment) {
       // exclude all attachments already deleted
                var attachment = currentAttachment;//当前待处理的附件
                if (attachment.contentType != 'text/x-moz-deleted') {
                    var path = getDefaultSaveFolder();//附件保存目录路径

                    var destFolder=makeFile(); 
                    destFolder.initWithPath(path);                    
                    var folder=destFolder;
                    var proposedfileobject = makeFile();
                    proposedfileobject.initWithFile(folder);

                    proposedfileobject.appendRelativePath(attachment.displayName);//附件的目标文件

                     if (proposedfileobject && proposedfileobject.parent && !proposedfileobject.parent.exists()) 
                     {//若父目录不存在，则先创建父目录
                         proposedfileobject.parent.create(proposedfileobject.DIRECTORY_TYPE, 0600);
                     }
                    aeMessenger.saveAttachmentToFolder(attachment.contentType, attachment.url,proposedfileobject.leafName, attachment.uri, proposedfileobject.parent, index);//保存当前待处理的附件
                }
//            }
    },

var aeMessenger = 
{
    Cc:Components.classes,
    Ci:Components.interfaces,

/**//* ************************************* saving ************************************* */
  saveAttachmentToFolder:function(contentType,url,displayName,messageUri,aDestFolder,attachmentindex)
  {
    var out=aDestFolder.clone();
    out=out.QueryInterface(Components.interfaces.nsILocalFile);
    out.append(displayName);
    if (this.saveAttachment(out, url, messageUri, contentType, attachmentindex)) return out;//保存附件的实际动作
    else return null;
  }, //##

  // simplied version of this function, taking out all fetchservice stuff.
  saveAttachment:function(file, url, messageUri, contentType, attachmentindex)
  {
    try{
    // strip out ?type=application/x-message-display because it confuses libmime
    if (url.indexOf("?type=application/x-message-display")!=-1) {
        url=url.replace("?type=application/x-message-display","").replace('&','?');
    }
    url=url.replace("/;section","?section");
    
    var saveListener = new aeSaveMsgListener(file, messenger,contentType,null,null,false);
      
    var convertedListener=saveListener.QueryInterface(Components.interfaces.nsIStreamListener);//流监听器

      var messageService=messenger.messageServiceFromURI(messageUri);//邮件服务提供者
      var openAttArgs=new Array(contentType,file.leafName,url,messageUri,convertedListener,null,null);//apply方法所需要的参数
       messageService.openAttachment.apply(null,openAttArgs); //真正去保存附件
    }
     catch (e)
     {
        return false;
    }
    return true;
  },
};