//// Site's main code
// 15/11/04 JM: Created

// Set up the page
function pageLoad(strLang) { return true; }


// Generate a ToC from page headings
function generateTOC()
{
	//Get language or fallback to english
	var lang = document.getElementsByTagName('html')[0].getAttribute('Lang');
	if (lang == 'undefined')
	{
		lang = 'en';
	}
	
	var topText, pageContentText;


	switch(lang)
	{
		case 'cs':
			topText = 'Horní strana';
			pageContentText = 'Obsah strany';				
			break;
		
		case 'de':
			topText = 'Nach oben';
			pageContentText = 'Seiteninhalt';				
			break;
		
		case 'fr':
			topText = 'Sous';
			pageContentText = 'Sur cette page';				
			break;	
		
		case 'it':
			topText = 'All\'inizio:';
			pageContentText = 'Contenuto della pagina';				
			break;	
		
		case 'nl':
			topText = 'Naar boven';
			pageContentText = 'Op deze pagina';			
			break;	
		
		case 'pl':
			topText = 'Do góry';
			pageContentText = 'Zawartość strony';
			break;
		
		case 'zh':
			topText = '页首';
			pageContentText = '页面内容';				
			break;
		
		default:
			topText = 'Top';
			pageContentText = 'On this page';
			break;
	}
	
	
	var menu = document.getElementById('TOC');
	
	if (null == menu)
	{
		return;
	}
	
	var headings =  $('#colContent h2, #colContent h3, #colContent h4');  //getElementsByTagNames('h2,h3,h4', document.getElementById('colContent'));
	var anchorContainer, anchor, linkId;
	
	if (headings.length < 3) { return;}	//only make a TOC if more than one heading
	
	// Don't allow more than 10 headings unless they're all top level ones
	if (headings.length > 10){
		headings = headings =  $('#colContent h2'); //getElementsByTagNames('h2', document.getElementById('colContent'));
	}
	
	menu.className = 'TOC'; //add classname; only do this now we know we have items as it will make the element appear - visible borders etc

	var tocAnchor = document.createElement('a');
	tocAnchor.setAttribute('name', 'pageTop');
	tocAnchor.id = 'pageTop';
	tocAnchor.className = 'TOCTitle';
	
	var anchorText = document.createTextNode(pageContentText);
	tocAnchor.appendChild(anchorText);
	menu.appendChild(tocAnchor);

	//Create the TOC
	tocList = document.createElement("ul");
	
	for (var entryPosition=0; entryPosition<headings.length; entryPosition++) 
	{
		var thisEntry = headings[entryPosition];
		
		// Determine the link
		linkId = thisEntry.id || uniqueId('tocTarget' + entryPosition);

		// Define the anchor container
		anchorContainer = document.createElement("li");
		anchorContainer.className = 'tocEntry' + thisEntry.nodeName.toLowerCase();

		// Define the anchor
		var anchor = document.createElement("a");
		var killTagsRegex = /<\/?[^>]*?>/gim; // Removes tags |  gim - all matches, case insensitive, multiline
		var tocText = thisEntry.innerHTML.replace(killTagsRegex, '');
		anchor.innerHTML = tocText;
		anchor.href = '#' + linkId;

		// Add the item
		anchorContainer.appendChild(anchor);
		if (anchor.innerHTML.replace(/\&nbsp;/, '').replace(/\&#160;/, '').replace(/\s/, '').length > 0) //not an empty link
		{
			tocList.appendChild(anchorContainer);

			// Modify the link target
			thisEntry.id = linkId;	// Change the element to ensure it has an id

			//Make the wrapper around heading so we can add 'top of page' etc with impunity
			var goTopWrapper = document.createElement('a');
			goTopWrapper.href='#pageTop';
			goTopWrapper.className = 'top';

			var goTopContent = document.createTextNode(topText); //Language concerns?
			goTopWrapper.appendChild(goTopContent);

			var hWrapper = document.createElement('div');
			hWrapper.className = 'tocHeader';
			hWrapper.appendChild(goTopWrapper);


			//then copy heading inside wrapper
			var hClone = thisEntry.cloneNode(true);
			hWrapper.appendChild(hClone);	

			//add wrapper next to target...
			thisEntry.parentNode.replaceChild(hWrapper, thisEntry);
		}
	}

	menu.appendChild(tocList);
}
// Generate a unique identity name
// Field: Identity to form the root - required by TOC
function uniqueId(root)
{
	var unique = root;
	
	while (document.getElementById(unique)) 
	{
		unique += "_";
	}
	
	return unique;
}
$(document).ready(generateTOC);






// Text functions
var _strWhitespace=" \t\n\r";

function LTrim(strTest) {
	var lLoop=0;
	while ((lLoop < strTest.length) && (_strWhitespace.indexOf(strTest.charAt(lLoop))) != -1) lLoop++;
	return strTest.substring(lLoop, this.length);
};

function RTrim(strTest) {
	var lLoop=this.length;
	while ((lLoop >= 0) && (_strWhitespace.indexOf(strTest.charAt(lLoop)) != -1)) lLoop--;
	return strTest.substring(0, lLoop + 1);
};

function Trim(strTest) {
	return LTrim(RTrim(strTest));
};