/*
	Lightbox JS: Fullsize Image Overlays 
	by Lokesh Dhakar - http://www.huddletogether.com

	For more information on this script, visit:
	http://huddletogether.com/projects/lightbox/

	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
	(basically, do anything you want, just leave my name and link)
	
	Table of Contents
	-----------------
	Configuration
	
	Functions
	- getPageScroll()
	- getPageSize()
	- pause()
	- getKey()
	- listenKey()
	- showLightbox()
	- hideLightbox()
	- initLightbox()
	- addLoadEvent()
	
	Function Calls
	- addLoadEvent(initLightbox)

*/



//
// Configuration
//

// If you would like to use a custom loading image or close button reference them in the next two lines.
var loadingImage = 'images/loading.gif';		
var closeButton = 'images/close.gif';		





//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}



//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}


	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}


//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Code from http://www.faqts.com/knowledge_base/view.phtml/aid/1602
//
function pause(numberMillis) {
	var now = new Date();
	var exitTime = now.getTime() + numberMillis;
	while (true) {
		now = new Date();
		if (now.getTime() > exitTime)
			return;
	}
}

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the lightbox.
//

function getKey(e){
	if (e == null) { // ie
		keycode = event.keyCode;
	} else { // mozilla
		keycode = e.which;
	}
	key = String.fromCharCode(keycode).toLowerCase();
	
	if(key == 'x'){ hideLightbox(); }
}


//
// listenKey()
//
function listenKey () {	document.onkeypress = getKey; }
	

//
// showLightbox()
// Preloads images. Pleaces new image in lightbox then centers and displays.
//
function showLightbox(objLink)
{
	// prep objects
	var objOverlay = document.getElementById('overlay');
	var objLightbox = document.getElementById('lightbox');
	var objCaption = document.getElementById('lightboxCaption');
	var objImage = document.getElementById('lightboxImage');
	var objLoadingImage = document.getElementById('loadingImage');
	var objLightboxDetails = document.getElementById('lightboxDetails');

	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	// center loadingImage if it exists
	if (objLoadingImage) {
		objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px');
		objLoadingImage.style.left = (((arrayPageSize[0] - 20 - objLoadingImage.width) / 2) + 'px');
		objLoadingImage.style.display = 'block';
	}

	// set height of Overlay to take up whole page and show
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';

	// preload image
	imgPreload = new Image();

	imgPreload.onload=function(){
		objImage.src = objLink.href;

		// center lightbox and make sure that the top and left values are not negative
		// and the image placed outside the viewport
		var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - imgPreload.height) / 2);
		var lightboxLeft = ((arrayPageSize[0] - 20 - imgPreload.width) / 2);
		
		objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
		objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";


		objLightboxDetails.style.width = imgPreload.width + 'px';
		
		if(objLink.getAttribute('title')){
			objCaption.style.display = 'block';
			//objCaption.style.width = imgPreload.width + 'px';
			objCaption.innerHTML = objLink.getAttribute('title');
		} else {
			objCaption.style.display = 'none';
		}
		
		// A small pause between the image loading and displaying is required with IE,
		// this prevents the previous image displaying for a short burst causing flicker.
		if (navigator.appVersion.indexOf("MSIE")!=-1){
			pause(250);
		} 

		if (objLoadingImage) {	objLoadingImage.style.display = 'none'; }

		// Hide select boxes as they will 'peek' through the image in IE
		selects = document.getElementsByTagName("select");
        for (i = 0; i != selects.length; i++) {
                selects[i].style.visibility = "hidden";
        }

	
		objLightbox.style.display = 'block';

		// After image is loaded, update the overlay height as the new image might have
		// increased the overall page height.
		arrayPageSize = getPageSize();
		objOverlay.style.height = (arrayPageSize[1] + 'px');
		
		// Check for 'x' keypress
		listenKey();

		return false;
	}

	imgPreload.src = objLink.href;
	
}





//
// hideLightbox()
//
function hideLightbox()
{
	// get objects
	objOverlay = document.getElementById('overlay');
	objLightbox = document.getElementById('lightbox');

	// hide lightbox and overlay
	objOverlay.style.display = 'none';
	objLightbox.style.display = 'none';

	// make select boxes visible
	selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}

	// disable keypress listener
	document.onkeypress = '';
}




//
// initLightbox()
// Function runs on window load, going through link tags looking for rel="lightbox".
// These links receive onclick events that enable the lightbox display for their targets.
// The function also inserts html markup at the top of the page which will be used as a
// container for the overlay pattern and the inline image.
//
function initLightbox()
{
	
	if (!document.getElementsByTagName){ return; }
	var anchors = document.getElementsByTagName("a");

	// loop through all anchor tags
	for (var i=0; i<anchors.length; i++){
		var anchor = anchors[i];

		if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "lightbox")){
			anchor.onclick = function () {showLightbox(this); return false;}
		}
	}

	// the rest of this code inserts html at the top of the page that looks like this:
	//
	// <div id="overlay">
	//		<a href="#" onclick="hideLightbox(); return false;"><img id="loadingImage" /></a>
	//	</div>
	// <div id="lightbox">
	//		<a href="#" onclick="hideLightbox(); return false;" title="Click anywhere to close image">
	//			<img id="closeButton" />		
	//			<img id="lightboxImage" />
	//		</a>
	//		<div id="lightboxDetails">
	//			<div id="lightboxCaption"></div>
	//			<div id="keyboardMsg"></div>
	//		</div>
	// </div>
	
	var objBody = document.getElementsByTagName("body").item(0);
	
	// create overlay div and hardcode some functional styles (aesthetic styles are in CSS file)
	var objOverlay = document.createElement("div");
	objOverlay.setAttribute('id','overlay');
	objOverlay.onclick = function () {hideLightbox(); return false;}
	objOverlay.style.display = 'none';
	objOverlay.style.position = 'absolute';
	objOverlay.style.top = '0';
	objOverlay.style.left = '0';
	objOverlay.style.zIndex = '90';
 	objOverlay.style.width = '100%';
	objBody.insertBefore(objOverlay, objBody.firstChild);
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	// preload and create loader image
	var imgPreloader = new Image();
	
	// if loader image found, create link to hide lightbox and create loadingimage
	imgPreloader.onload=function(){

		var objLoadingImageLink = document.createElement("a");
		objLoadingImageLink.setAttribute('href','#');
		objLoadingImageLink.onclick = function () {hideLightbox(); return false;}
		objOverlay.appendChild(objLoadingImageLink);
		
		var objLoadingImage = document.createElement("img");
		objLoadingImage.src = loadingImage;
		objLoadingImage.setAttribute('id','loadingImage');
		objLoadingImage.style.position = 'absolute';
		objLoadingImage.style.zIndex = '150';
		objLoadingImageLink.appendChild(objLoadingImage);

		imgPreloader.onload=function(){};	//	clear onLoad, as IE will flip out w/animated gifs

		return false;
	}

	imgPreloader.src = loadingImage;

	// create lightbox div, same note about styles as above
	var objLightbox = document.createElement("div");
	objLightbox.setAttribute('id','lightbox');
	objLightbox.style.display = 'none';
	objLightbox.style.position = 'absolute';
	objLightbox.style.zIndex = '100';	
	objBody.insertBefore(objLightbox, objOverlay.nextSibling);
	
	// create link
	var objLink = document.createElement("a");
	objLink.setAttribute('href','#');
	objLink.setAttribute('title','Click to close');
	objLink.onclick = function () {hideLightbox(); return false;}
	objLightbox.appendChild(objLink);

	// preload and create close button image
	var imgPreloadCloseButton = new Image();

	// if close button image found, 
	imgPreloadCloseButton.onload=function(){

		var objCloseButton = document.createElement("img");
		objCloseButton.src = closeButton;
		objCloseButton.setAttribute('id','closeButton');
		objCloseButton.style.position = 'absolute';
		objCloseButton.style.zIndex = '200';
		objLink.appendChild(objCloseButton);

		return false;
	}

	imgPreloadCloseButton.src = closeButton;

	// create image
	var objImage = document.createElement("img");
	objImage.setAttribute('id','lightboxImage');
	objLink.appendChild(objImage);
	
	// create details div, a container for the caption and keyboard message
	var objLightboxDetails = document.createElement("div");
	objLightboxDetails.setAttribute('id','lightboxDetails');
	objLightbox.appendChild(objLightboxDetails);

	// create caption
	var objCaption = document.createElement("div");
	objCaption.setAttribute('id','lightboxCaption');
	objCaption.style.display = 'none';
	objLightboxDetails.appendChild(objCaption);

	// create keyboard message
	var objKeyboardMsg = document.createElement("div");
	objKeyboardMsg.setAttribute('id','keyboardMsg');
	objKeyboardMsg.innerHTML = 'нажмите <a href="#" onclick="hideLightbox(); return false;" style=\"font-size: 14px; font-color: black;\"><kbd>x</kbd></a> чтобы закрыть';
	objLightboxDetails.appendChild(objKeyboardMsg);


}




//
// addLoadEvent()
// Adds event to window.onload without overwriting currently assigned onload functions.
// Function found at Simon Willison's weblog - http://simon.incutio.com/
//
function addLoadEvent(func)
{	
	var oldonload = window.onload;
	if (typeof window.onload != 'function'){
    	window.onload = func;
	} else {
		window.onload = function(){
		oldonload();
		func();
		}
	}

}



addLoadEvent(initLightbox);	// run initLightbox onLoad

/**
 * jQuery Tree Control
 *
 * @author Maxim Vasiliev
 */
(function($){

	var CLASS_JQUERY_TREE = 'jquery-tree';
	var CLASS_JQUERY_TREE_CONTROLS = 'jquery-tree-controls';
	var CLASS_JQUERY_TREE_COLLAPSE_ALL = 'jquery-tree-collapseall';
	var CLASS_JQUERY_TREE_EXPAND_ALL = 'jquery-tree-expandall';
	var CLASS_JQUERY_TREE_COLLAPSED = 'jquery-tree-collapsed';
	var CLASS_JQUERY_TREE_HANDLE = 'jquery-tree-handle';
	var CLASS_JQUERY_TREE_TITLE = 'jquery-tree-title';
	var CLASS_JQUERY_TREE_NODE = 'jquery-tree-node';
	var CLASS_JQUERY_TREE_LEAF = 'jquery-tree-leaf';
	var CLASS_JQUERY_TREE_CHECKED = 'jquery-tree-checked';
	var CLASS_JQUERY_TREE_UNCHECKED = 'jquery-tree-unchecked';
	var CLASS_JQUERY_TREE_CHECKED_PARTIAL = 'jquery-tree-checked-partial';

	var COLLAPSE_ALL_CODE = '<span class="' + CLASS_JQUERY_TREE_COLLAPSE_ALL + '">Свернуть все</span>';
	var EXPAND_ALL_CODE = '<span class="' + CLASS_JQUERY_TREE_EXPAND_ALL + '">Развернуть все</span>';
	var TREE_CONTROLS_CODE = '<div class="' + CLASS_JQUERY_TREE_CONTROLS + '">' +
	COLLAPSE_ALL_CODE +
	EXPAND_ALL_CODE +
	'</div>';

	var TREE_NODE_HANDLE_CODE = '<span class="' + CLASS_JQUERY_TREE_HANDLE + '">+</span>';
	var TREE_NODE_HANDLE_COLLAPSED = "+";
	var TREE_NODE_HANDLE_EXPANDED = "&minus;";

	$.fn.extend({

		/**
		 * Делает дерево из структуры вида:
		 * <ul>
		 *   <li><label><input type="checkbox" />Item1</label></li>
		 *   <li>
		 *     <label><input type="checkbox" />ItemWithSubitems</label>
		 *     <ul>
		 *       <li><label><input type="checkbox" />Subitem1</label></li>
		 *     </ul>
		 *   </li>
		 * </ul>
		 */
		Tree: function(){
			// Добавим контролы для всего дерева (все свернуть, развернуть и т.д.), и добавим класс
			$(this)
				.addClass(CLASS_JQUERY_TREE)
				.before(TREE_CONTROLS_CODE)
				.prev('.' + CLASS_JQUERY_TREE_CONTROLS)
				.find('.' + CLASS_JQUERY_TREE_COLLAPSE_ALL).click(function(){
					$(this).parent().next('.' + CLASS_JQUERY_TREE)
						.find('li:has(ul)')
						.addClass(CLASS_JQUERY_TREE_COLLAPSED)
						.find('.' + CLASS_JQUERY_TREE_HANDLE)
						.html(TREE_NODE_HANDLE_COLLAPSED);
				})

				.parent('.' + CLASS_JQUERY_TREE_CONTROLS).find('.' + CLASS_JQUERY_TREE_EXPAND_ALL)
					.click(function(){
						$(this).parent().next('.' + CLASS_JQUERY_TREE)
							.find('li:has(ul)')
								.removeClass(CLASS_JQUERY_TREE_COLLAPSED)
							.find('.' + CLASS_JQUERY_TREE_HANDLE)
								.html(TREE_NODE_HANDLE_EXPANDED);
					});

			$('li', this).find(':first').addClass(CLASS_JQUERY_TREE_TITLE)
				.closest('li').addClass(CLASS_JQUERY_TREE_LEAF);

			// Для всех элементов, являющихся узлами (имеющих дочерние элементы)...
			$('li:has(ul:has(li))', this).find(':first')
				// ... добавим элемент, открывающий/закрывающий узел
				.before(TREE_NODE_HANDLE_CODE)
				// ... добавим к контейнеру класс "узел дерева" и "свернем".
				.closest('li')
					.addClass(CLASS_JQUERY_TREE_NODE)
					.addClass(CLASS_JQUERY_TREE_COLLAPSED)
					.removeClass(CLASS_JQUERY_TREE_LEAF);

			// ... повесим обработчик клика
			$('.' + CLASS_JQUERY_TREE_HANDLE, this).bind('click', function(){
				var leafContainer = $(this).parent('li');
				var leafHandle = leafContainer.find('>.' + CLASS_JQUERY_TREE_HANDLE);

				leafContainer.toggleClass(CLASS_JQUERY_TREE_COLLAPSED);

				if (leafContainer.hasClass(CLASS_JQUERY_TREE_COLLAPSED))
					leafHandle.html(TREE_NODE_HANDLE_COLLAPSED);
				else
					leafHandle.html(TREE_NODE_HANDLE_EXPANDED);
			});

			// Добавляем обработку клика по чекбоксам
			$('input:checkbox', this).click(function(){
				setLabelClass(this);
				checkCheckbox(this);
			})
			// Выставляем чекбоксам изначальные классы
			.each(function(){
				setLabelClass(this);
				if (this.checked)
					checkParentCheckboxes(this);
			})
			// Для IE вешаем обработчики на лейбл
			.closest('label').click(function(){
				labelClick(this);
				checkCheckbox($('input:checkbox', this));
			});
		}

	});

	/**
	 * Рекурсивно проверяет, все ли чекбоксы в поддереве родительского узла выбраны.
	 * Если ни один чекбокс не выбран - снимает чек с родительского чекбокса
	 * Если хотя бы один, но не все - выставляет класс CLASS_JQUERY_TREE_CHECKED_PARTIAL родительскому чекбоксу
	 * Если все - ставит чек на родительский чекбокс
	 *
	 * @param {Object} checkboxElement текущий чекбокс
	 */
	function checkParentCheckboxes(checkboxElement){
		if (typeof checkboxElement == 'undefined' || !checkboxElement)
			return;

		// проверим, все ли чекбоксы выделены/частично выделены на вышележащем уровне
		var closestNode = $(checkboxElement).closest('ul');
		var allCheckboxes = closestNode.find('input:checkbox');
		var checkedCheckboxes = closestNode.find('input:checkbox:checked');

		var allChecked = allCheckboxes.length == checkedCheckboxes.length;

		var parentCheckbox = closestNode.closest('li').find('>.' + CLASS_JQUERY_TREE_TITLE + ' input:checkbox');

		if (parentCheckbox.length > 0) {
			parentCheckbox.get(0).checked = allChecked;

			if (!allChecked && checkedCheckboxes.length > 0)
				parentCheckbox.closest('label')
					.addClass(CLASS_JQUERY_TREE_CHECKED_PARTIAL)
					.removeClass(CLASS_JQUERY_TREE_CHECKED)
					.removeClass(CLASS_JQUERY_TREE_UNCHECKED);
			else
				if (allChecked)
					parentCheckbox.closest('label')
						.removeClass(CLASS_JQUERY_TREE_CHECKED_PARTIAL)
						.removeClass(CLASS_JQUERY_TREE_UNCHECKED)
						.addClass(CLASS_JQUERY_TREE_CHECKED);
				else
					parentCheckbox.closest('label')
						.removeClass(CLASS_JQUERY_TREE_CHECKED_PARTIAL)
						.removeClass(CLASS_JQUERY_TREE_CHECKED)
						.addClass(CLASS_JQUERY_TREE_UNCHECKED);

			checkParentCheckboxes(parentCheckbox.get(0));
		}
	}

	/**
	 * Если у текущего чекбокса есть дочерние узлы - меняет их состояние
	 * на состояние текущего чекбокса
	 *
	 * @param {Object} checkboxElement текущий чекбокс
	 */
	function checkCheckbox(checkboxElement){
		// чекнем/анчекнем нижележащие чекбоксы
		$(checkboxElement).closest('li').find('input:checkbox').each(function(){
			this.checked = $(checkboxElement).attr('checked');
			setLabelClass(this);
		});
		checkParentCheckboxes(checkboxElement);
	};

	/**
	 * Выставляет класс лейблу в зависимости от состояния чекбокса
	 *
	 * @param {Object} checkboxElement чекбокс
	 */
	function setLabelClass(checkboxElement){
		isChecked = $(checkboxElement).attr('checked');

		if (isChecked) {
			$(checkboxElement).closest('label')
				.addClass(CLASS_JQUERY_TREE_CHECKED)
				.removeClass(CLASS_JQUERY_TREE_UNCHECKED)
				.removeClass(CLASS_JQUERY_TREE_CHECKED_PARTIAL);
		}
		else {
			$(checkboxElement).closest('label')
				.addClass(CLASS_JQUERY_TREE_UNCHECKED)
				.removeClass(CLASS_JQUERY_TREE_CHECKED)
				.removeClass(CLASS_JQUERY_TREE_CHECKED_PARTIAL);
		}
	};

	/**
	 * Обрабатывает клик по лейблу (для IE6)
	 */
	function labelClick(labelElement){
		var checkbox = $('input:checkbox', labelElement);
		var checked = checkbox.attr('checked');
		checkbox.attr('checked', !checked);
		setLabelClass(checkbox);
	}

})(jQuery);