/*
 * JTip
 * By Cody Lindley (http://www.codylindley.com)
 * Under an Attribution, Share Alike License
 * JTip is built on top of the very light weight jquery library.
 修改提示框, 添加了 name 属性, 可以利用 A 标签的 type=[html|url] 进行加载不同的内容, 
    如果type="html", 则提示框中的信息为紧挨着此A标记的一个 class="jTip" 的 div 的 html();
    如果 type="url",则提示框中的信息为指定 url 中的内容
 实现提示:
 一, 添加 CSS/jTip.css
 二, 添加 javascript/jTip.js
 三, 页面设置:
    1. 设置 A 标记的 class 为 jTip
    2. 设置 A 标记的 name (显示为加粗标题)
    3. 设置 A 标记的 href 
例: <a class="jTip" id="t" name="要显示的加组标题" type="url|html">?</a><div class="jTip">提示框中的内容,可以为 html 标记(html标记内容显示的时候会自动转义)</div>  
 */
//on page load (as soon as its ready) call JT_init
$(function() {
JT_init();
    //解决异步 Ajax 时重新加载出现页面布局错乱的问题
//    if (Sys && Sys.WebForms && Sys.WebForms.PageRequestManager && Sys.WebForms.PageRequestManager.getInstance)
//        Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequestHandlerForJTip);
});

function endRequestHandlerForJTip(sender, e) {
    JT_init();
}

function JT_init() {
    $("a.jTip").siblings("div.jTip").hide();
    //如果 dom 对象没有 ID,则产生一个随机的ID
    $("a.jTip").each(function() {
        if (!$(this).attr("id")) {
            $(this).attr("id", getRandId());
        }
    });
    $("a.jTip")
    .hover(function(){JT_show(this)},function(){$('#JT').remove()})
    .click(function(){return false});
}
//返回一个 dom ID, 用于给对象查寻引用
function getRandId() {
    var randID = parseInt(Math.random() * 10000);
    if ($("#" + randID).get(0)) {
        return getRandId();
    }
    return randID;
}

function JT_show(a) {
    var url = $(a).attr("href");
    var linkId = $(a).attr("id");
    var title = $(a).attr("name");
    if ($(a).attr("type") == false) {
        throw new Exception("请设置锚标记的 type 属性(值为: html 或 url)");
        return;
    }

	if(title == false)title="&nbsp;";
	var de = document.documentElement;
	var w = self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
	var hasArea = w - getAbsoluteLeft(linkId);
	var clickElementy = getAbsoluteTop(linkId) - 3; //set y position
	//取得参数列表
	var iSubStringIndex = url.indexOf("?");
	//如果没有查找到 ? 号,则索引从 0 开始, 否则, 索引从 ? 号的下一个字符开始
	iSubStringIndex = iSubStringIndex == -1 ? 0 : parseInt(iSubStringIndex) + 1;
    var queryString = url.substr(iSubStringIndex);// url.replace(/^[^\?]+\??/, '');
    var params = parseQuery(queryString);
	if(params['width'] === undefined){params['width'] = 250};
	if(params['link'] !== undefined){
	$('#' + linkId).bind('click',function(){window.location = params['link']});
	$('#' + linkId).css('cursor','pointer');
	}
	
	if(hasArea>((params['width']*1)+75)){
		$("body").append("<div id='JT' style='width:"+params['width']*1+"px'><div id='JT_arrow_left'></div><div id='JT_close_left'>"+title+"</div><div id='JT_copy'><div class='JT_loader'><div></div></div>");//right side
		var arrowOffset = getElementWidth(linkId) + 11;
		var clickElementx = getAbsoluteLeft(linkId) + arrowOffset; //set x position
	}else{
		$("body").append("<div id='JT' style='width:"+params['width']*1+"px'><div id='JT_arrow_right' style='left:"+((params['width']*1)+1)+"px'></div><div id='JT_close_right'>"+title+"</div><div id='JT_copy'><div class='JT_loader'><div></div></div>");//left side
		var clickElementx = getAbsoluteLeft(linkId) - ((params['width']*1) + 15); //set x position
	}
	
	$('#JT').css({left: clickElementx+"px", top: clickElementy+"px"});
	$('#JT').show();
	if ($(a).attr("type") == "url") {
	    $('#JT_copy').load(url);
	} else if ($(a).attr("type") == "html") {
	    var content = $(a).siblings("div.jTip").html();
	    $('#JT_copy').html(content);
	}

}

function getElementWidth(objectId) {
	x = document.getElementById(objectId);
	return x.offsetWidth;
}

function getAbsoluteLeft(objectId) {
	// Get an object left position from the upper left viewport corner
	o = document.getElementById(objectId)
	oLeft = o.offsetLeft            // Get left position from the parent object
	while(o.offsetParent!=null) {   // Parse the parent hierarchy up to the document element
		oParent = o.offsetParent    // Get parent object reference
		oLeft += oParent.offsetLeft // Add parent left position
		o = oParent
	}
	return oLeft
}

function getAbsoluteTop(objectId) {
	// Get an object top position from the upper left viewport corner
	o = document.getElementById(objectId)
	oTop = o.offsetTop            // Get top position from the parent object
	while(o.offsetParent!=null) { // Parse the parent hierarchy up to the document element
		oParent = o.offsetParent  // Get parent object reference
		oTop += oParent.offsetTop // Add parent top position
		o = oParent
	}
	return oTop
}

function parseQuery ( query ) {
   var Params = new Object ();
   if ( ! query ) return Params; // return empty object
   var Pairs = query.split(/[;&]/);
   for ( var i = 0; i < Pairs.length; i++ ) {
      var KeyVal = Pairs[i].split('=');
      if ( ! KeyVal || KeyVal.length != 2 ) continue;
      var key = unescape( KeyVal[0] );
      var val = unescape( KeyVal[1] );
      val = val.replace(/\+/g, ' ');
      Params[key] = val;
   }
   return Params;
}

function blockEvents(evt) {
    if (evt.target) {
        evt.preventDefault();
    }else{
        evt.returnValue = false;
    }
}