/*****************************
**   Misc functions
******************************/
function $(id){
	return document.getElementById(id);	
}         
function addStyleProperties(cssStr){
	var head = document.getElementsByTagName('head')[0];
	var styleSheets = head.getElementsByTagName('style');
	var styleSheet = null;
	if (styleSheets.length){
		styleSheet = styleSheets[styleSheets.length-1];
	} else {
		styleSheet = document.createElement("style");
		styleSheet.setAttribute("type", "text/css");
		head.appendChild(styleSheet);	
	}
	
	if(styleSheet.styleSheet){ // IE
		styleSheet.styleSheet.cssText += cssStr;
	} else { // w3c
		styleSheet.appendChild(document.createTextNode(cssStr));
	}
}	
/*****************************
**   Event listeners
******************************/        

function checkEvent(oEvt){
	oEvt=(oEvt) ? oEvt : ( (window.event) ? window.event : null );
	if(oEvt && oEvt.srcElement && !window.opera)
		oEvt.target=oEvt.srcElement;
	return oEvt;
}          

function addEvent(objElement, strEventType, ptrEventFunc) {
	if (objElement.addEventListener)
		objElement.addEventListener(strEventType, ptrEventFunc, false);
	else if (objElement.attachEvent)
		objElement.attachEvent('on' + strEventType, ptrEventFunc);
}     

/*****************************    
**   Common class methods
******************************/   
                   
function matchClass( objNode, strCurrClass ) {
	return ( objNode && objNode.className.length && objNode.className.match( new RegExp('(^|\\s+)(' + strCurrClass + ')($|\\s+)') ) );
}
              
function getElementsByClassName(objParentNode, strNodeName, strClassName){
	var nodes = objParentNode.getElementsByTagName(strNodeName);
	if(!strClassName){
		return nodes;	
	}
	var nodesWithClassName = [];
	for(var i=0; i<nodes.length; i++){
		if(matchClass( nodes[i], strClassName )){
			//nodesWithClassName.push(nodes[i]);
			nodesWithClassName[nodesWithClassName.length] = nodes[i];
		}	
	}
	return nodesWithClassName;
}
          
/*****************************
**   Some other methods
******************************/

function getPageY( oElement ) {
	var iPosY = oElement.offsetTop;
	while ( oElement.offsetParent != null ) {
		oElement = oElement.offsetParent;
		iPosY += oElement.offsetTop;
		if (oElement.tagName == 'BODY') break;
	}
	return iPosY;
}

function getPageX( oElement ) {
	var iPosX = oElement.offsetLeft;
	while ( oElement.offsetParent != null ) {
		oElement = oElement.offsetParent;
		iPosX += oElement.offsetLeft;
		if (oElement.tagName == 'BODY') break;
	}
	return iPosX;
}               

function getMousePosition(e) {
	if (e.pageX || e.pageY){
		var posX = e.pageX;
		var posY = e.pageY;
	}else if (e.clientX || e.clientY) 	{
		var posX = e.clientX + document.body.scrollLeft + document.documentElement.scrollLeft;
		var posY = e.clientY + document.body.scrollTop + document.documentElement.scrollTop;
	}
	return {x:posX, y:posY}	
}


    
/*---------------*/
/*
	Paginator 3000
	- idea by ecto (fhn.ru)
	- coded by karaboz (futurico.ru)
*/

Paginator = function(id, pagesTotal, pagesSpan, currentPage, baseUrl, ext_Url){
	this.htmlBox = $(id);
    this.ext_Url = ext_Url;   
	if(!this.htmlBox || !pagesTotal || !pagesSpan) return;

	this.pagesTable;
	this.pagesTr; 
	this.sliderTr;
	this.pagesCells;
	this.slider;            
	
	this.pagesTotal = pagesTotal;
	if(pagesSpan < pagesTotal){
		this.pagesSpan = pagesSpan;
	} else {
		this.pagesSpan = pagesTotal;
		addClass(this.htmlBox, 'fullsize');
	}
	
	this.currentPage = currentPage; 
	this.firstCellValue;     

	if(baseUrl){
		this.baseUrl = baseUrl;
	} else {
		this.baseUrl = "/pages/";
	}

	this.initPages();
	this.initSlider();
	this.drawPages();
	this.initEvents();

	this.scrollToCurrentPage();
	this.setCurrentPagePoint();
} 

Paginator.prototype.initPages = function(){                                                            
	                                                                                                   
	/*var html = "<table><tr><td width='14'><a href='#' class='paginator_prec' style='width:14px;'>&laquo;</a></td><td><table><tr>" 
	for (var i=1; i<=this.pagesSpan; i++){
		html += "<td></td>"
	}
	html += "</tr>" +
	"<tr><td colspan='" + this.pagesSpan + "'>" +
	"<div class='scrollbar'>" + 
		"<div class='line'></div>" + 
		"<div class='current_page_point'></div>" + 
		"<div class='slider'>" + 
			"<div class='slider_point'></div>" + 
		"</div>" + 
	"</div>" +
	"</td></tr></table></td><td width='14'><a href='#' class='paginator_suiv' style='width:14px;'>&raquo;</a></td></tr></table>"*/
    
    var precedent_page = this.currentPage-1;
    var suivant_page = this.currentPage+1;
    if(precedent_page > 0)
        var url_precedent = this.baseUrl+(this.currentPage-1)+ this.ext_Url;
    else
        var url_precedent = '#';
    if(suivant_page <= this.pagesTotal)
        var url_suivant = this.baseUrl+(this.currentPage+1)+ this.ext_Url;
    else
        var url_suivant = '#';
	
	var html = "<a href='"+url_precedent+"' class='paginator_prec'>&nbsp;&laquo;&nbsp;</a><div style='float:left;'><table><tr>" 
	for (var i=1; i<=this.pagesSpan; i++){
		html += "<td></td>"
	}
	html += "</tr>" +
	"<tr><td colspan='" + this.pagesSpan + "'>" +
	"<div class='scrollbar'>" + 
		"<div class='line'></div>" + 
		"<div class='current_page_point'></div>" + 
		"<div class='slider'>" + 
			"<div class='slider_point'></div>" + 
		"</div>" + 
	"</div>" +
	"</td></tr></table></div><a href='"+url_suivant+"' class='paginator_suiv'>&nbsp;&raquo;&nbsp;</a><div id='total_pages'>Vous consultez la page <u> "+this.currentPage+" / "+this.pagesTotal+" </u>, faites glisser le curseur ci dessus pour visionner l'ensemble des pages</div>"
	                              
	this.htmlBox.innerHTML = html;    
    
	this.pagesTable = this.htmlBox.getElementsByTagName('table')[0];        
	this.pagesTr = this.pagesTable.getElementsByTagName('tr')[0]; 
	this.sliderTr = this.pagesTable.getElementsByTagName('tr')[1];
	this.pagesCells = this.pagesTr.getElementsByTagName('td');
	this.scrollbar = getElementsByClassName(this.pagesTable, 'div', 'scrollbar')[0];
	this.slider = getElementsByClassName(this.pagesTable, 'div', 'slider')[0];
	this.currentPagePoint = getElementsByClassName(this.pagesTable, 'div', 'current_page_point')[0];      
}

Paginator.prototype.initSlider = function(){
	this.slider.xPos = 0;
	this.slider.style.width = this.pagesSpan/this.pagesTotal * 100 + "%";	
}

Paginator.prototype.initEvents = function(){  
	var _this = this;         

	this.slider.onmousedown = function(e){   
		if (!e) var e = window.event;
		e.cancelBubble = true;
		if (e.stopPropagation) e.stopPropagation();

		this.dx = getMousePosition(e).x - this.xPos;
		document.onmousemove = function(e){
			if (!e) var e = window.event;
			_this.slider.xPos = getMousePosition(e).x - _this.slider.dx;
			_this.setSlider();
			_this.drawPages();
		}
		document.onmouseup = function(){
			document.onmousemove = null;
			_this.enableSelection();
		}
		_this.disableSelection();
	}

	this.scrollbar.onmousedown = function(e){ 
		if(matchClass(_this.paginatorBox, 'fullsize')) return;

		if (!e) var e = window.event;
		_this.slider.xPos = getMousePosition(e).x - getPageX(_this.scrollbar) - _this.slider.offsetWidth/2;
		_this.setSlider();
		_this.drawPages();
	}

	addEvent(window, 'resize', resizePaginator);
}

Paginator.prototype.setSlider = function(){
	this.slider.style.left = this.slider.xPos + "px";

}

Paginator.prototype.drawPages = function(){  
                        
	var percentFromLeft = this.slider.xPos/(this.pagesTable.offsetWidth);      
	this.firstCellValue = Math.round(percentFromLeft * this.pagesTotal);
	var html = "";   
	if(this.firstCellValue < 1){
		this.firstCellValue = 1;
		this.slider.xPos = 0;
		this.setSlider();
	} else if(this.firstCellValue >= this.pagesTotal - this.pagesSpan) {
		this.firstCellValue = this.pagesTotal - this.pagesSpan + 1;
		this.slider.xPos = this.pagesTable.offsetWidth - this.slider.offsetWidth;
		this.setSlider();
	}            
	for(var i=0; i<this.pagesCells.length; i++){
		var currentCellValue = this.firstCellValue + i;
		var prefixLength = String(this.pagesTotal).length - String(currentCellValue).length;
		var prefix = this.makePrefix(prefixLength);    
		if(currentCellValue == this.currentPage){
			//html = "<li id=\"current\">" + String(currentCellValue) +  "</li>";
			html = "<li><a href='#' id=\"current\">" + String(currentCellValue) +  String(prefix) + "</a></li>";
		} else {
			//html = "<li>" + "<a href='" + this.baseUrl + currentCellValue + "'>" + String(currentCellValue) + "</a>" + "</li>";
			html = "<li>" + "<a class='bt_chgtpage' href='" + this.baseUrl + currentCellValue + this.ext_Url +"'>" + String(currentCellValue) + "</a>" + String(prefix) + "</li>";
		}
		this.pagesCells[i].innerHTML = html; 
	}
}

Paginator.prototype.scrollToCurrentPage = function(){
	this.slider.xPos = (this.currentPage - Math.round(this.pagesSpan/2))/this.pagesTotal * this.pagesTable.offsetWidth;
	this.setSlider();
	this.drawPages();
}

Paginator.prototype.setCurrentPagePoint = function(){
	if(this.currentPage == 1){
		this.currentPagePoint.style.left = 0;
	} else {
		this.currentPagePoint.style.left = this.currentPage/this.pagesTotal * this.pagesTable.offsetWidth + "px";	
	}
}

Paginator.prototype.makePrefix = function(prefixLength){
	var prefix = "";
	for (var i=0; i<prefixLength; i++){
		prefix += "";
		//prefix += "_";
	}
	return prefix;
}

Paginator.prototype.disableSelection = function(){
	document.onselectstart = function(){
		return false;
	}
	this.slider.focus();	
}

Paginator.prototype.enableSelection = function(){
	document.onselectstart = function(){
		return true;
	}
	this.slider.blur();		
}

resizePaginator = function (){
	if(typeof pag == 'undefined') return;

	pag.setCurrentPagePoint();
	pag.scrollToCurrentPage();
}