/**
	Ajax Extensible Page - (c) 2007 Denis Sureau
	http://ajax.xul.fr
	Version 1.3.
	Extension for the Anaa framework.
	http://www.anaa.eu
*/


/**
	Usage: 
	Include this JavaScript file and the anaa.js file into the head section of your page.
	You can shorten this code by removing the comments but the copyright notive above.
*/	

var buttonDevelop = "green-develop.gif";
var buttonSummarize = "green-summarize.gif";


// Expand / Collapse a single object

function fileCallback(source, element)
{
	element.innerHTML = source;	// set the new content or cross
}

/**
	This function swaps the hidden text with the displayed one.
*/

function quietVerbose(element)
{
	var container = element.getAttribute("name");

	if(container == null || container.length == 0)
	{
		container = element.getAttribute("title");

		if(container == null || container.length == 0) 
		{
			container = element.getAttribute("src");
			if(container == null || container.length == 0) return;
			element.setAttribute("title", element.innerHTML);	// save content into title
			// loading an external text file and assign content into current element
			AARead(container, fileCallback, element);		// call Ajax to retrieve the file.
			return;
		}	
		
		var y = element.innerHTML;	// get shown text
		element.innerHTML = container;		// show hidden text
		element.setAttribute("title", y);	// save previously displayed text

	}

	var x = document.getElementById(container).innerHTML;	// get hidden text
	var y = element.innerHTML;	// get shown text

	element.innerHTML = x;		// show hidden text
	document.getElementById(container).innerHTML = y;	// save previously displayed text
}


/**
	Summarize a single element
*/	


function doQuiet(element)	// target is large, small is hidden
{
	var small = element.getAttribute('name');	// collapsed is hidden
	if(small == null || small.length == 0) 
	{
		container = element.getAttribute("title");	
		if(container == null || container.length == 0) return;
		var y = element.innerHTML;	// get shown text
		if(container.length > y.length) return; 
		element.innerHTML = container;		// show hidden text
		element.setAttribute("title", y);	// save previously displayed text
		return;
	}	

	var largeText = element.innerHTML;	// get large text displayed
	var smallText = document.getElementById(small).innerHTML;	// get small text hidden

	if(smallText.length > largeText.length) return;	// hidden text must be smaller than displayed

	document.getElementById(small).innerHTML = largeText;	// hide
	element.innerHTML = smallText;	// display

}


/**
	Develop a single element
*/	

function doVerbose(element)
{
	var largeID = element.getAttribute('name');	// the hidden larger text to display

	if(largeID == null || largeID.length == 0)
	{
		var content = element.getAttribute('title');
		if(content != null && content.length != 0)
		{
			// already loaded
			var x = element.innerHTML;	// get current content
			if(x.length > content.length) return; // current must be smaller
			element.innerHTML = content;
			element.setAttribute("title", x);
			return;
		}
		
		// Loading a file, saving current content into an attribute and replacing it by the content of the file
		var url = element.getAttribute('src');
		if(url == null || url.length == 0) return;
		element.setAttribute("title", element.innerHTML);	// save content into title
		// loading an external text file and assign content into current element
		AARead(url, fileCallback, element);		// call Ajax to retrieve the file.
		return;
	}	

	var smaller = element.innerHTML;	// currently displayed
	var larger = document.getElementById(largeID).innerHTML;	// is hidden and must be displayed

	if(smaller.length > larger.length) return;	// already developed, ignore

	element.innerHTML = larger;	// display big text
	document.getElementById(largeID).innerHTML = smaller;		// hide small text
}

/**
	Develop the whole page
*/	

function develop()
{
	var content;
	var list = document.getElementsByTagName("span");

	for(i = 0;  i < list.length;  i++)
	{
		var element = list.item(i);
		var id = element.getAttribute("id");		// not all span tags are processed
		if(id != null && id.length > 0) 
		{
			doVerbose(element);
		}	
	}
}


/**
	Summarize the whole page
*/	

function summarize()
{
	var content;
	var list = document.getElementsByTagName("span");

	for(i = 0;  i < list.length;  i++)
	{
		var element = list.item(i);
		var id = element.getAttribute('id');
		if(id != null && id.length > 0) 
		{
			doQuiet(element);
		}	
	}
}



function switchButton(element)
{
	var d = buttonDevelop.length;
	var s = buttonSummarize.length;

	var image = element.firstChild;
	var name = image.getAttribute("src");

	var iname;
	if(name != null && name.length != 0)
	{
		iname = name.substr(name.length - d, d);
	}	

	if(iname == buttonDevelop)
	{		
		image.setAttribute("src", buttonSummarize);
		develop();
		return;				
	}
	iname = name.substr(name.length - s, s);
	if(iname == buttonSummarize)
	{
		image.setAttribute("src", buttonDevelop);
		summarize();
		return;				
	}
}