/*

 * Thickbox 2.1 - jQuery plugin for displaying content in a box above the page

 * 

 * Copyright (c) 2006, 2007 Cody Lindley (http://www.codylindley.com)

 *

 * Licensed under the MIT License:

 *   http://www.opensource.org/licenses/mit-license.php

 */



// on page load call TB_init

$(document).ready(TB_init);



// add thickbox to href elements that have a class of .thickbox

function TB_init(){

	$("a.thickbox").click(function(event){

		// stop default behaviour

		event.preventDefault();

		// remove click border

		this.blur();

	

		// get caption: either title or name attribute

		var caption = this.title || this.name || "";

		

		// get rel attribute for image groups

		var group = this.rel || false;

		

		// display the box for the elements href

		TB_show(caption, this.href, group);

	});

}



// called when the user clicks on a thickbox link

function TB_show(caption, url, rel) {



	// create iframe, overlay and box if non-existent

	if ( !$("#TB_HideSelect").length ) {

		$("body").append("<div id='TB_overlay'></div><div id='TB_window'></div>");

		$("#TB_overlay").click(TB_remove);

	}

	// TODO replace or check if event is already assigned

	$(window).scroll(TB_position);

	

	// TODO replace

	TB_overlaySize();

	

	// TODO create loader only once, hide and show on demand

	$("body").append("<div id='TB_load'><img src='images/loadingAnimation.gif' /></div>");

	TB_load_position();

	

	// check if a query string is involved

	var baseURL = url.match(/(.+)?/)[1] || url;



	// regex to check if a href refers to an image

	var imageURL = /\.(jpe?g|png|gif|bmp)/gi;



	// check for images

	if ( baseURL.match(imageURL) ) {

		var dummy = { caption: "", url: "", html: "" };

		

		var prev = dummy,

			next = dummy,

			imageCount = "";

			

		// if an image group is given

		if ( rel ) {

			function getInfo(image, id, label) {

				return {

					caption: image.title,

					url: image.href,

					html: "<span id='TB_" + id + "'>&nbsp;&nbsp;<a href='#'>" + label + "</a></span>"

				}

			}

		

			// find the anchors that point to the group

			var imageGroup = $("a[@rel="+rel+"]").get();

			var foundSelf = false;

			

			// loop through the anchors, looking for ourself, saving information about previous and next image

			for (var i = 0; i < imageGroup.length; i++) {

				var image = imageGroup[i];

				var urlTypeTemp = image.href.match(imageURL);

				

				// look for ourself

				if ( image.href == url ) {

					foundSelf = true;

					imageCount = "Image " + (i + 1) + " of "+ (imageGroup.length);

				} else {

					// when we found ourself, the current is the next image

					if ( foundSelf ) {

						next = getInfo(image, "next", "Next &gt;");

						// stop searching

						break;

					} else {

						// didn't find ourself yet, so this may be the one before ourself

						prev = getInfo(image, "prev", "&lt; Prev");

					}

				}

			}

		}

		

		imgPreloader = new Image();

		imgPreloader.onload = function() {

			imgPreloader.onload = null;



			// Resizing large images

			var pagesize = TB_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

			

			// TODO don't use globals

			TB_WIDTH = imageWidth + 30;

			TB_HEIGHT = imageHeight + 60;

			

			// TODO empty window content instead

			$("#TB_window").append("<a href='' id='TB_ImageOff' title='Close'><img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' alt='"+caption+"'/></a>" + "<div id='TB_caption'>"+caption+"<div id='TB_secondLine'>" + imageCount + prev.html + next.html + "</div></div><div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton' title='Close'>cerrar</a></div>");

			

			$("#TB_closeWindowButton").click(TB_remove);

			

			function buildClickHandler(image) {

				return function() {

					$("#TB_window").remove();

					$("body").append("<div id='TB_window'></div>");

					TB_show(image.caption, image.url, rel);

					return false;

				};

			}

			var goPrev = buildClickHandler(prev);

			var goNext = buildClickHandler(next);

			if ( prev.html ) {

				$("#TB_prev").click(goPrev);

			}

			

			if ( next.html ) {		

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

			}

			

			// TODO use jQuery, maybe with event fix plugin, or just get the necessary parts of it

			document.onkeydown = function(e) {

				if (e == null) { // ie

					keycode = event.keyCode;

				} else { // mozilla

					keycode = e.which;

				}

				switch(keycode) {

				case 27:

					TB_remove();

					break;

				case 190:

					if( next.html ) {

						document.onkeydown = null;

						goNext();

					}

					break;

				case 188:

					if( prev.html ) {

						document.onkeydown = null;

						goPrev();

					}

					break;

				}

			}

			

			// TODO don't remove loader etc., just hide and show later

			TB_position();

			$("#TB_load").remove();

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

			

			// for safari using css instead of show

			// TODO is that necessary? can't test safari

			$("#TB_window").css({display:"block"});

		}

		imgPreloader.src = url;

		

	} else { //code to show html pages

		

		var queryString = url.match(/\?(.+)/)[1];

		var params = TB_parseQuery( queryString );

		

		TB_WIDTH = (params['width']*1) + 30;

		TB_HEIGHT = (params['height']*1) + 40;



		var ajaxContentW = TB_WIDTH - 30,

			ajaxContentH = TB_HEIGHT - 45;

		

		if(url.indexOf('TB_iframe') != -1){				

			urlNoQuery = url.split('TB_');		

			$("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton' title='Close'>cerrar</a></div></div>");

		} else {

			$("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'>cerrar</a></div></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px;'></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").css({display:"block"}); 

			}else if(url.indexOf('TB_iframe') != -1){

				TB_position();

				if(frames['TB_iframeContent'] == undefined){//be nice to safari

					$("#TB_load").remove();

					$("#TB_window").css({display:"block"});

					$(document).keyup( function(e){ var key = e.keyCode; if(key == 27){TB_remove()} });

				}

			}else{

				$("#TB_ajaxContent").load(url, function(){

					TB_position();

					$("#TB_load").remove();

					$("#TB_window").css({display:"block"}); 

				});

			}

		

	}

	

	$(window).resize(TB_position);

	

	document.onkeyup = function(e){ 	

		if (e == null) { // ie

			keycode = event.keyCode;

		} else { // mozilla

			keycode = e.which;

		}

		if(keycode == 27){ // close

			TB_remove();

		}	

	}

		

}



//helper functions below



function TB_showIframe(){

	$("#TB_load").remove();

	$("#TB_window").css({display:"block"});

}



function TB_remove() {

 	$("#TB_imageOff").unbind("click");

	$("#TB_overlay").unbind("click");

	$("#TB_closeWindowButton").unbind("click");

	$("#TB_window").fadeOut("fast",function(){$('#TB_window,#TB_overlay,#TB_HideSelect').remove();});

	$("#TB_load").remove();

	return false;

}



function TB_position() {

	var pagesize = TB_getPageSize();	

	var arrayPageScroll = TB_getPageScrollTop();

	var style = {width: TB_WIDTH, left: (arrayPageScroll[0] + (pagesize[0] - TB_WIDTH)/2), top: (arrayPageScroll[1] + (pagesize[1]-TB_HEIGHT)/2)};

	$("#TB_window").css(style);

}



function TB_overlaySize(){

	if (window.innerHeight && window.scrollMaxY || window.innerWidth && window.scrollMaxX) {	

		yScroll = window.innerHeight + window.scrollMaxY;

		xScroll = window.innerWidth + window.scrollMaxX;

		var deff = document.documentElement;

		var wff = (deff&&deff.clientWidth) || document.body.clientWidth || window.innerWidth || self.innerWidth;

		var hff = (deff&&deff.clientHeight) || document.body.clientHeight || window.innerHeight || self.innerHeight;

		xScroll -= (window.innerWidth - wff);

		yScroll -= (window.innerHeight - hff);

	} else if (document.body.scrollHeight > document.body.offsetHeight || document.body.scrollWidth > document.body.offsetWidth){ // all but Explorer Mac

		yScroll = document.body.scrollHeight;

		xScroll = document.body.scrollWidth;

	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari

		yScroll = document.body.offsetHeight;

		xScroll = document.body.offsetWidth;

  	}

	$("#TB_overlay").css({"height": yScroll, "width": xScroll});

	$("#TB_HideSelect").css({"height": yScroll,"width": xScroll});

}



function TB_load_position() {

	var pagesize = TB_getPageSize();

	var arrayPageScroll = TB_getPageScrollTop();

	$("#TB_load")

		.css({left: (arrayPageScroll[0] + (pagesize[0] - 100)/2), top: (arrayPageScroll[1] + ((pagesize[1]-100)/2)) })

		.css({display:"block"});

}



function TB_parseQuery ( query ) {

	// return empty object

	if( !query )

		return {};

	var params = {};

	

	// parse query

	var pairs = query.split(/[;&]/);

	for ( var i = 0; i < pairs.length; i++ ) {

		var pair = pairs[i].split('=');

		if ( !pair || pair.length != 2 )

			continue;

		// unescape both key and value, replace "+" with spaces in value

		params[unescape(pair[0])] = unescape(pair[1]).replace(/\+/g, ' ');

   }

   return params;

}



function TB_getPageScrollTop(){

	var yScrolltop;

	var xScrollleft;

	if (self.pageYOffset || self.pageXOffset) {

		yScrolltop = self.pageYOffset;

		xScrollleft = self.pageXOffset;

	} else if (document.documentElement && document.documentElement.scrollTop || document.documentElement.scrollLeft ){	 // Explorer 6 Strict

		yScrolltop = document.documentElement.scrollTop;

		xScrollleft = document.documentElement.scrollLeft;

	} else if (document.body) {// all other Explorers

		yScrolltop = document.body.scrollTop;

		xScrollleft = document.body.scrollLeft;

	}

	arrayPageScroll = new Array(xScrollleft,yScrolltop) 

	return arrayPageScroll;

}



function TB_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;

}