/*
	蜗牛谷模态同步处理JS 
	
	需要使用woniugu_core.js文件
	
	Table of Contents
	-----------------
	Configuration
	
	Functions
	- getPageScroll()
	- getPageSize()
	- pause()
	- getKey()
	- listenKey()
	- showLightbox() 
	- hideLightbox()
	- initLightbox()
	- addLoadEvent()
	
	Function Calls
	- addLoadEvent(initLightbox)

*/

function TmwLightBox(){
	this.LoadingImage = 'loading.gif';	
	this.OverlayImage = 'overlay.png';
	this.BasePath = '';
	this.zIndex =999;
	
	
	this._objLightbox = null;
	this._objOverlay = null;
	this._objOverlayFrame = null;
}

TmwLightBox.prototype.Author = 'dypher@gmail.com';

// getPageScroll()
// Returns array with x,y page scroll values.
TmwLightBox.prototype.getPageScroll = function getPageScroll(){
	var yScroll;
	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}
	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}

// getPageSize()
// Returns array with page width, height and window width, height
TmwLightBox.prototype.getPageSize = function(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}


	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

TmwLightBox.prototype.Create = function(){
	if (!document.getElementsByTagName){ return; }

	// the rest of this code inserts html at the top of the page that looks like this:
	// <iframe id="overlayframe">
	// </iframe>
	// <div id="overlay">
	//	</div>
	// <div id="lightbox">
	//		<div id="keyboardMsg"></div>
	// </div>
	
	var objBody = document.getElementsByTagName("body").item(0);
	
	// create overlay div and hardcode some functional styles (aesthetic styles are in CSS file)
	this._objOverlay = document.createElement("div");
	this._objOverlay.setAttribute('id','overlay');
	this._objOverlay.style.display = 'none';
	this._objOverlay.style.zIndex = this.zIndex + 1;
	
	this._objOverlay.style.position = 'absolute';
	this._objOverlay.style.top = '0px';
	this._objOverlay.style.left = '0px';
	this._objOverlay.style.width = '100%';
	this._objOverlay.style.height = '100%';
	objBody.insertBefore(this._objOverlay, objBody.firstChild);
	
	// create overlay iframe and hardcode some functional styles (aesthetic styles are in CSS file)
	this._objOverlayFrame = document.createElement("iframe");
	//this._objOverlayFrame.setAttribute('id','overlayframe');
	this._objOverlayFrame.style.display = 'none';
	this._objOverlayFrame.style.zIndex = this.zIndex ;

	if (navigator.appVersion.indexOf("MSIE")!=-1)
	{
		this._objOverlayFrame.style.filter = 'Alpha(Opacity=75,Finishopacity=75)';
	}
	else
	{
		this._objOverlayFrame.style.backgroundColor = 'transparent';
	}
	this._objOverlayFrame.style.position = 'absolute';
	this._objOverlayFrame.style.top = '0px';
	this._objOverlayFrame.style.left = '0px';
	this._objOverlayFrame.style.width = '100%';
	this._objOverlayFrame.style.height = '100%';
	objBody.insertBefore(this._objOverlayFrame, objBody.firstChild);

	var arrayPageSize = this.getPageSize();
	var arrayPageScroll = this.getPageScroll();

	// create lightbox div, same note about styles as above
	this._objLightbox = document.createElement("div");
	this._objLightbox.setAttribute('id','lightbox');
	this._objLightbox.style.display = 'none';
	this._objLightbox.style.position = 'absolute';
	this._objLightbox.style.zIndex = this.zIndex + 2;	
	objBody.insertBefore(this._objLightbox, this._objOverlay.nextSibling);
	
}

TmwLightBox.prototype.ShowLoadingBox = function(imgSrc){
	var imgFile = imgSrc;
	if(imgSrc==undefined)	
		imgFile = this.LoadingImage;
	var LoadingImageHtml = '<image src="'+imgFile+'" border="0"/>';
	var objLoadingImage = new Image();
	objLoadingImage.src = imgFile;
	this.ShowLightboxContent(LoadingImageHtml, objLoadingImage.width, objLoadingImage.height );
	
}

// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
TmwLightBox.prototype.pause = function(numberMillis) {
	var now = new Date();
	var exitTime = now.getTime() + numberMillis;
	while (true) {
		now = new Date();
		if (now.getTime() > exitTime)
			return;
	}
}

TmwLightBox.prototype.ShowDialog = function(title,content, width, height)
{
		var _objContent = document.createElement("div");
		var _divTop1 = document.createElement("div");
		_divTop1.style.cssText = "height:1px;margin:0 2px;font-size:1px;line-height:1px;background:#888";		
		_objContent.appendChild(_divTop1);
		
		var _divTop2 = document.createElement("div");
		_divTop2.style.cssText = "height:1px;font-size:1px;line-height:1px;background:#888;margin:0 1px;border-left:1px solid #888;border-right:1px solid #555";		
		_objContent.appendChild(_divTop2);
		
		var _divTitleBar = document.createElement("div");
		_divTitleBar.style.cssText = "margin:0 0;border-left:1px solid #888;border-right:1px solid #555;background:#888;min-height:14px;padding:2px 6px 3px 6px;font-size:100%;color:#fff";
		_divTitleBar.innerText = title;		
		_objContent.appendChild(_divTitleBar);

		var _divContent = document.createElement("div");
		_divContent.style.cssText = "margin:0 0;border-left:1px solid #888;border-right:1px solid #555;background:#eee;padding:5px 6px 3px 6px";
		if (typeof(content)=="object") 
		{
			_divContent.appendChild(content);
		}
		else
		{
			//_divContent.innerHTML = content;		
			setInnerHTML(_divContent, content);
		}
		_objContent.appendChild(_divContent);
		
		var _divBot2 = document.createElement("div");
		_divBot2.style.cssText = "height:1px;font-size:1px;line-height:1px;background:#eee;margin:0 1px;border-left:1px solid #888;border-right:1px solid #555";		
		_objContent.appendChild(_divBot2);
		
		var _divBot1 = document.createElement("div");
		_divBot1.style.cssText = "height:1px;margin:0 2px;font-size:1px;line-height:1px;background:#555;";		
		_objContent.appendChild(_divBot1);
		
		this.ShowLightboxContent(_objContent, width, height );
	
}

TmwLightBox.prototype.ShowDialogNew = function(content, width, height)
{
		var _objContent = document.createElement("div");
		
		if (typeof(content)=="object") 
		{
			_objContent.appendChild(content);
		}
		else
		{
			//_divContent.innerHTML = content;		
			setInnerHTML(_objContent, content);
		}

		this.ShowLightboxContent(_objContent, width, height );
	
}


TmwLightBox.prototype.ShowLightboxContent = function(content, width, height)
{
	var arrayPageSize = this.getPageSize();
	var arrayPageScroll = this.getPageScroll();

	// set height of Overlay to take up whole page and show
	this._objOverlay.style.height = (arrayPageSize[1] + 'px');
	this._objOverlay.style.display = 'block';
	this._objOverlayFrame.style.height = this._objOverlay.style.height;
	this._objOverlayFrame.style.display = 'block';


	if (navigator.appVersion.indexOf("MSIE")!=-1)
	{
		//this._objOverlay.style.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader( src= "'+this.OverlayImage+'" , sizingMethod= "scale" )';
	}
	else
	{
		this._objOverlay.style.backgroundImage = 'url('+this.OverlayImage+')';
		this._objOverlay.style.backgroundRepeat = 'repeat';
		this._objOverlay.style.backgroundAttachment = 'fixed';
	}

	
		// center lightbox and make sure that the top and left values are not negative
		// and the image placed outside the viewport
		var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - height) / 2);
		var lightboxLeft = ((arrayPageSize[0] - 20 - width) / 2);
		
		this._objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
		this._objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";


		this._objLightbox.style.width = width + 'px';
		
		setInnerHTML(this._objLightbox, content); //使用woniugu_core.js中setInnerHTML函数
		//this._objLightbox.innerHTML = content;
		
		// A small pause between the image loading and displaying is required with IE,
		// this prevents the previous image displaying for a short burst causing flicker.

		this._objLightbox.style.display = 'block';

}


// hideLightbox()
TmwLightBox.prototype.hideLightbox = function()
{
	this._objOverlay.style.display = 'none';
	this._objOverlayFrame.style.display = 'none';
	this._objLightbox.style.display = 'none';

}

TmwLightBox.prototype.showLightbox = function()
{
	this._objOverlay.style.display = '';
	this._objOverlayFrame.style.display = '';
	this._objLightbox.style.display = '';

}