/*
 * Thickbox 1.2 - One box to rule them all.
 * By Cody Lindley (http://www.codylindley.com)
 * Under an Attribution, Share Alike License
 * Thickbox is built on top of the very light weight jquery library.
 *
 * Modified for SPIP <www.spip.net> by Fil <fil@rezo.net>:
 * - added recognition of images based on a.type
 * - added an image gallery
 * - added keyboard navigation ('n'ext, 'p'revious, 'q'uit)
 * - customize path to the css and wheel image
 * - default size for thickbox links that have no width x height indicated
 * - don't load css when not needed
 * - TODO: don't load js when not needed!!
 */


function TB_Image() {
	//var t = this.title || this.name || '<small>'+this.href+'</small>';
	var t = this.title || this.name ;
	var dd;

	// affiche les dd qui sont associes a des dt contenant des a class=thickbox
//	$("#documents_portfolio/dl/dt/a.thickbox/../../dd").each();

//	$("../../dt/../dd", this).show(); // OK mais pas parfait
//	$("parent::dt/parent::dl/dd", this).show();

//	$(this).parent().next().show();

	// chercher une description (si je suis dans un dt => dd suivants)
//	if (dd = $(this.parentNode.parentNode).find('dd').get(0)) {
//		t += '<div class="description">'+ dd.innerHTML +'</div>';
//	}

	TB_on();
	TB_show(t,this.href,'image');
	return false;
}

function TB_text() {
	var t = this.title || this.name || '<small>'+this.href+'</small>';
	TB_on();
	TB_show(t,this.href, 'text');
	return false;
}

function TB_init(root){
	// add the thickbox to all links of class=thickbox
	$("a.thickbox",root).each(
		function(i) {
			if (
				(this.type && this.type.match(/^image[\/](jpeg|gif|png)$/i))
				|| (this.href && this.href.match(/\.(jpeg|jpg|png|gif)$/i))
			) {
				this.onclick = TB_Image;

				// we store image links in an array (for a gallery)
				imageArray.push ([
					this.href,
					this.title || this.name
				]);

			}
			else {
				this.onclick = TB_text;
			}
		}
	);
}

// keyboard controls:
// q,x => quit
// n, space => next
// p => previous
function TB_keys (e) {
	if (e == null) { // ie
		keycode = event.keyCode;
	} else { // mozilla
		keycode = e.which;
	}
	key = String.fromCharCode(keycode).toLowerCase();
	if (key == 'x' || key =='q'){
		e.stopPropagation();
		TB_remove();
	} else if (key == ' ' || key == 'n') {
		e.stopPropagation();
		TB_next();
	} else if (key == 'p') {
		e.stopPropagation();
		TB_prev();
	}
}

function TB_on() {
	// NON, ne marche pas avec ie
	// charger la css
	/*$("head").append(
		"<style type='text/css' media='all'>@import '"
		+ TB_chemin_css
		+ "';</style>"
	);*/


	$("body").append("<div id='TB_overlay'></div><div id='TB_window' style=\"overflow: hidden;\"></div>");
	$("#TB_overlay").click(TB_remove);
	$(window).scroll(TB_position);
	TB_overlaySize();

	$("body").append("<div id='TB_load'><img src='"+TB_chemin_animation+"' /></div>");
	TB_load_position();

	old_onkeypress = document.onkeypress;
	document.onkeypress = TB_keys;
}

function TB_show(caption, url, type) {//function called when the user clicks on a thickbox link
	try {

		if (type=='image') {//code to show images

			imgPreloader = new Image();
			imgPreloader.onload = function(){
				
			imgPreloader.onload = null;
		
			// Resizing large images added by Christian Montoya
			var pagesize = getPageSize();
			var x = pagesize[0] - 150;
			var y = pagesize[1] - 150;
			var imageWidth = imgPreloader.width;
			var imageHeight = imgPreloader.height;
			if (imageWidth > x) {
				imageHeight = imageHeight * (x / imageWidth); 
				imageWidth = x; 
				if (imageHeight > y) { 
					imageWidth = imageWidth * (y / imageHeight); 
					imageHeight = y; 
				}
			} else if (imageHeight > y) { 
				imageWidth = imageWidth * (y / imageHeight); 
				imageHeight = y; 
				if (imageWidth > x) { 
					imageHeight = imageHeight * (x / imageWidth); 
					imageWidth = x;
				}
			}
			// End Resizing
			
			TB_WIDTH = imageWidth + 20;
			TB_HEIGHT = imageHeight + 20;
			
			//caption = lignes_longues(caption,35);

			$("#TB_window").append("<a href='' id='TB_ImageOff'><img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' alt='"+caption+"'/></a>"
								 + "<div id='TB_legend' style='background-color:#fff'><div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton'><img src='"+TB_chemin_close+"' /></a></div><div id='TB_caption'>"+caption+"</div><div>"); 
			
			TB_position();
			$("#TB_legend").hide();
			$("#TB_closeWindowButton").click(TB_remove);		
			$("#TB_load").remove();
			$("#TB_window").fadeIn("slow");
			setTimeout('$("#TB_legend").slideDown(800);',500);

			$("#TB_ImageOff").click(TB_next);

			}
	  
			imgPreloader.src = url;
		}

		else {//code to show html pages
			
			var queryString = url.replace(/^[^\?]+\??/,'');
			var params = parseQuery( queryString );
			
			TB_WIDTH = ((params['width'] || 640)*1) + 30;
			TB_HEIGHT = ((params['height'] || 480)*1) + 40;
			//ajaxContentW = TB_WIDTH - 30;
			ajaxContentW = TB_WIDTH;
			ajaxContentH = TB_HEIGHT - 45;
			//$("#TB_window").css("overflow","auto");
			$("#TB_window").append("<div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'>fermer</a></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;min-height:"+ajaxContentH+"px;'><br class=\"nettoyeur\" /></div>");
			$("#TB_closeWindowButton").click(TB_remove);
			
				if(url.indexOf('TB_inline') != -1){
					$("#TB_ajaxContent").html($('*' + params['inlineId']).html());
					TB_position();
					$("#TB_load").remove();
					$("#TB_window").slideDown();
				}else{
					$("#TB_ajaxContent").load(url, function(){
						TB_position();
						$("#TB_load").remove();
						$("#TB_window").slideDown();
					});
				}
			
		}
		
		$(window).resize(TB_position);
		
	} catch(e) {
		alert( e );
	}
}

//helper functions below

function TB_remove() {
	document.onkeypress = old_onkeypress;
	$("#TB_window").fadeOut("fast",function(){$('#TB_window,#TB_overlay').remove();});
	$("#TB_load").remove();
	return false;
}

function TB_next() {
	var current = $("#TB_Image").get(0).src;
	for (var i=0; i<imageArray.length; i++) {
		if (imageArray[i][0] == current) {
			var next = i+1;
		}
	}

	if (next<imageArray.length) {
		
		$("#TB_window").hide();
		$("body").append("<div id='TB_load' style='display:none;'><img src='"+TB_chemin_animation+"' /></div>");
		TB_load_position();

		$("#TB_window").html('');
		
		//TB_show(imageArray[next][1] || imageArray[next][0],imageArray[next][0], 'image');
		TB_show(imageArray[next][1],imageArray[next][0], 'image');
	}
	else {
		TB_remove();
	}

	return false;
}

function TB_prev() {
	var current = $("#TB_Image").get(0).src;
	var prev = -1;
	for (var i=0; i<imageArray.length; i++) {
		if (imageArray[i][0] == current) {
			prev = i-1;
		}
	}

	if (prev>=0) {
		$("#TB_window").html('');
		TB_show(imageArray[prev][1] || imageArray[prev][0],
			imageArray[prev][0], 'image');
	}
	else {
		TB_remove();
	}

	return false;
}


function TB_position() {
	var pagesize = getPageSize();	
	var arrayPageScroll = getPageScrollTop();
	
	$("#TB_window").css({width:TB_WIDTH+"px",height:TB_HEIGHT+"px",
	left: ((pagesize[0] - TB_WIDTH)/2)+"px", top: (arrayPageScroll[1] + ((pagesize[1]-TB_HEIGHT)/2))+"px" });
	TB_overlaySize();

}

function TB_overlaySize(){
	if (window.innerHeight && window.scrollMaxY) {	
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		yScroll = document.body.offsetHeight;
  	}
	$("#TB_overlay").css("height",yScroll +"px");
}

function TB_load_position() {
	var pagesize = getPageSize();
	var arrayPageScroll = getPageScrollTop();

	$("#TB_load")
	.css({left: ((pagesize[0] - 100)/2)+"px", top: (arrayPageScroll[1] + ((pagesize[1]-100)/2))+"px" })
	.css({display:"block"});
}

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 lignes_longues(t, n){
var _debut_ = t.substring(0, n);
var _fin_ = t.substring(n, 500);
t = "".concat(_debut_,'<br />',_fin_);
return t;
}


function getPageScrollTop(){
	var yScrolltop;
	if (self.pageYOffset) {
		yScrolltop = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScrolltop = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScrolltop = document.body.scrollTop;
	}
	arrayPageScroll = new Array('',yScrolltop) 
	return arrayPageScroll;
}

function getPageSize(){
	var de = document.documentElement;
	var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
	var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight;
	
	arrayPageSize = new Array(w,h) 
	return arrayPageSize;
}

//
// init
//
var imageArray = [];
if(typeof TB_chemin_css == 'undefined') { TB_chemin_css = 'thickbox.css'; }
if(typeof TB_chemin_animation == 'undefined') { TB_chemin_animation = 'circle_animation.gif'; }
$(TB_init);