// +----------------------------------------------------------------------+
// | ThinkPHP                                                             |
// +----------------------------------------------------------------------+
// | Copyright (c) 2006 liu21st.com All rights reserved.                  |
// +----------------------------------------------------------------------+
// | 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.                       |
// +----------------------------------------------------------------------+
// | Author: liu21st <liu21st@gmail.com>                                  |
// | Modify: yhustc <yhustc@gmail.com>                                  |
// +----------------------------------------------------------------------+
// $Id$
// 
// Ajax for ThinkPHP
document.write("<div id='ThinkAjaxResult' class='ThinkAjax' ></div>");
var m = {
    '\b': '\\b',
    '\t': '\\t',
    '\n': '\\n',
    '\f': '\\f',
    '\r': '\\r'
};
var ThinkAjax = {
    method:'POST',			//发送方法
    bComplete:false,			//是否完成
    updateTip:'数据处理中～',	//后台处理中提示信息
    image:['','',''], // 图片配置 依次是处理中、成功和错误的显示图片
    tipTarget:'ThinkAjaxResult',	//提示信息对象
    showTip:true,	 // 是否显示提示信息，默认开启
    status:0, //返回状态码
    info:'',	//返回信息
    data:'',	//返回数据
    intval:0,
    options:{}, // 连贯操作的参数
    debug:false,
    activeRequestCount:0,
    // Ajax连接初始化
    getTransport: function() {
        var xmlHttp = false;
        /*@cc_on @*/
        /*@if (@_jscript_version >= 5)
		try {
		  xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
		  try {
			xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
		  } catch (e2) {
			xmlHttp = false;
		  }
		}
		@end @*/

        if (!xmlHttp && typeof XMLHttpRequest != "undefined") {
            xmlHttp = new XMLHttpRequest();
        }//XMLHttpReques对象创建成功

        return xmlHttp;
    },
    // 连贯操作方法支持
    // ThinkAjax.url(...).params(...).tip(...).target(...).response(...).send()
    tip:function (tips){
        this.options['tip']	=	tips;
        return this;
    },
    target:function (taget){
        this.options['target']	=	target;
        return this;
    },
    response:function (response){
        this.options['response']	=	response;
        return this;
    },
    url:function (url){
        this.options['url']	=	url;
        return this;
    },
    params:function (vars){
        this.options['var']	=	vars;
        return this;
    },
    loading:function (target,tips){
        if (g(target))
        {
            if(this.tipTarget == target)
            {
                var arrayPageScroll = getPageScroll();
                g(target).style.position = 'absolute';
                g(target).style.display = 'block';
                g(target).style.top = (arrayPageScroll[1] +  'px');
                g(target).style.right = '5px';
                g(target).style.opacity = 0.1;
            }
            if ('' != this.image[0])
            {
                g(target).innerHTML = '<IMG SRC="'+this.image[0]+'"  BORDER="0" ALT="loading..." align="absmiddle"> '+tips;
            }else{
                g(target).innerHTML = tips;
            }
            //使用更新效果
            fadeIn(target);
        }
    },

    ajaxResponse:function(request,target,response){
        // 获取ThinkPHP后台返回Ajax信息和数据
        // 此格式为ThinkPHP专用格式
        //alert(request.responseText);
        var str	= request.responseText;
        str = str.replace(/^\s*(.*?)[\s\n]*$/g, '$1');
        str  = str.replace(/([\x00-\x1f\\"])/g, function (a, b) {
            var c = m[b];
            if (c) {
                return c;
            }else{
                return b;
            }
        }) ;
        if (this.debug)
        {
            // 调试模式下面输出eval前的字符串
            alert(str);
        }
        $return =  eval('(' + str + ')');
        this.status = $return.status;
        this.info	 =	 $return.info;
        this.data = $return.data;

        // 处理返回数据
        // 需要在客户端定义ajaxReturn方法
        if (response == undefined)
        {
            try	{
                (ajaxReturn).apply(this,[this.data,this.status,this.info]);
            }
            catch (e){}
			 
        }else {
            try	{
                (response).apply(this,[this.data,this.status,this.info]);
            }
            catch (e){}
        }
        if (g(target))
        {
            // 显示提示信息
            if (this.showTip && this.info!= undefined && this.info!=''){
                if (this.status==1)
                {
                    if ('' != this.image[1])
                    {
                        g(target).innerHTML	= '<IMG SRC="'+this.image[1]+'"  BORDER="0" ALT="success..." align="absmiddle"> <span style="color:blue">'+this.info+'</span>';
                    }else{
                        g(target).innerHTML	= '<span style="color:blue">'+this.info+'</span>';
                    }
					
                }else{
                    if ('' != this.image[2])
                    {
                        g(target).innerHTML	= '<IMG SRC="'+this.image[2]+'"  BORDER="0" ALT="error..." align="absmiddle"> <span style="color:red">'+this.info+'</span>';
                    }else{
                        g(target).innerHTML	= '<span style="color:red">'+this.info+'</span>';
                    }
                }
            }
            // 提示信息停留5秒,不消失，修正消失后，不能提交的BUG
            if (this.showTip)
                this.intval = window.setTimeout(function(){
                    fadeOut(target)
                },99999);
        }
    },
    // 发送Ajax请求
    send:function(url,pars,response,target,tips)
    {
        var xmlhttp = this.getTransport();
        url = (url == undefined)?this.options['url']:url;
        pars = (pars == undefined)?this.options['var']:pars;
        if (target == undefined)	{
            target = (this.options['target'])?this.options['target']:this.tipTarget;
        }
        if (tips == undefined) {
            tips = (this.options['tip'])?this.options['tip']: this.updateTip;
        }
        if (this.showTip)
        {
            this.loading(target,tips);
        }
        if (this.intval)
        {
            window.clearTimeout(this.intval);
        }
        this.activeRequestCount++;
        this.bComplete = false;
        try {
            if (this.method == "GET")
            {
                xmlhttp.open(this.method, url+"?"+pars, true);
                pars = "";
            }
            else
            {
                xmlhttp.open(this.method, url, true);
                xmlhttp.setRequestHeader("Method", "POST "+url+" HTTP/1.1");
                xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
            }
            var _self = this;
            xmlhttp.onreadystatechange = function (){
                if (xmlhttp.readyState == 4 ){
                    if( xmlhttp.status == 200 && !_self.bComplete)
                    {
                        _self.bComplete = true;
                        _self.activeRequestCount--;
                        _self.ajaxResponse(xmlhttp,target,response);
                    }
                }
            }
            xmlhttp.send(pars);
        }
        catch(z) {
            return false;
        }
    },
    // 发送表单Ajax操作，暂时不支持附件上传
    sendForm:function(formId,url,response,target,tips)
    {
        vars = F(formId);
        this.send(url,vars,response,target,tips);
    },
    // 绑定Ajax到HTML元素和事件
    // event 支持根据浏览器的不同
    // 包括 focus blur mouseover mouseout mousedown mouseup submit click dblclick load change keypress keydown keyup
    bind:function(source,event,url,vars,response,target,tips)
    {
        var _self = this;
        addEvent(source,event,function (){
            _self.send(url,vars,response,target,tips)
        });
    },
    // 页面加载完成后执行Ajax操作
    load:function(url,vars,response,target,tips)
    {
        var _self = this;
        windowAddEvent('load',function (){
            _self.send(url,vars,response,target,tips)
        });
    },
    // 延时执行Ajax操作
    time:function(url,vars,time,response,target,tips)
    {
        var _self = this;
        myTimer =  window.setTimeout(function (){
            _self.send(url,vars,response,target,tips)
        },time);
    },
    // 定制执行Ajax操作
    repeat:function(url,vars,intervals,response,target,tips)
    {
        var _self = this;
        _self.send(url,vars,response,target);
        myTimer = window.setInterval(function (){
            _self.send(url,vars,response,target,tips)
        },intervals);
    }
}