// -----------------------------------------------------------------------------------
//
//     Lightbox v2.01
//     by Lokesh Dhakar - http://www.huddletogether.com
//     3/31/06
//
//     For more information on this script, visit:
//     http://huddletogether.com/projects/lightbox2/
//
//     Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//
//     Credit also due to those who have helped, inspired, and made their code available to the public.
//     Including: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.org), Thomas Fuchs(mir.aculo.us), and others.
//
//
// -----------------------------------------------------------------------------------
/*

       Table of Contents
       -----------------
       Configuration
       Global Variables

       Extending Built-in Objects
       - Object.extend(Element)
       - Array.prototype.removeDuplicates()
       - Array.prototype.empty()

       Lightbox Class Declaration
       - initialize()
       - start()
       - changeImage()
       - resizeImageContainer()
       - showImage()
       - updateDetails()
       - updateNav()
       - enableKeyboardNav()
       - disableKeyboardNav()
       - keyboardAction()
       - preloadNeighborImages()
       - end()

       Miscellaneous Functions
       - getPageScroll()
       - getPageSize()
       - getKey()
       - listenKey()
       - showSelectBoxes()
       - hideSelectBoxes()
       - pause()
       - initLightbox()

       Function Calls
       - addLoadEvent(initLightbox)

*/
// -----------------------------------------------------------------------------------

//
//     Configuration
//
var fileLoadingImage = "../tr/wp-content/plugins/lightbox/images/loading.gif";
var fileBottomNavCloseImage = "../tr/wp-content/plugins/lightbox/images/closelabel.gif";

var resizeSpeed = 7;   // controls the speed of the image resizing (1=slowest and 10=fastest)

var borderSize = 10;   //if you adjust the padding in the CSS, you will need to update this variable

// -----------------------------------------------------------------------------------

//
//     Global Variables
//
var imageArray = new Array;
var activeImage;

if(resizeSpeed > 10){ resizeSpeed = 10;}
if(resizeSpeed < 1){ resizeSpeed = 1;}
resizeDuration = (11 - resizeSpeed) * 0.15;

// -----------------------------------------------------------------------------------

//
//     Additional methods for Element added by SU, Couloir
//     - further additions by Lokesh Dhakar (huddletogether.com)
//
Object.extend(Element, {
       getWidth: function(element) {
               element = $(element);
               return element.offsetWidth;
       },
       setWidth: function(element,w) {
               element = $(element);
       element.style.width = w +"px";
       },
       setHeight: function(element,h) {
               element = $(element);
       element.style.height = h +"px";
       },
       setTop: function(element,t) {
               element = $(element);
       element.style.top = t +"px";
       },
       setSrc: function(element,src) {
       element = $(element);
       element.src = src;
       },
       setHref: function(element,href) {
       element = $(element);
       element.href = href;
       },
       setInnerHTML: function(element,content) {
               element = $(element);
               element.innerHTML = content;
       }
});

// -----------------------------------------------------------------------------------

//
//     Extending built-in Array object
//     - array.removeDuplicates()
//     - array.empty()
//
Array.prototype.removeDuplicates = function () {
       for(i = 1; i < this.length; i++){
               if(this[i][0] == this[i-1][0]){
                       this.splice(i,1);
               }
       }
}

// -----------------------------------------------------------------------------------

Array.prototype.empty = function () {
       for(i = 0; i <= this.length; i++){
               this.shift();
       }
}

// -----------------------------------------------------------------------------------

//
//     Lightbox Class Declaration
//     - initialize()
//     - start()
//     - changeImage()
//     - resizeImageContainer()
//     - showImage()
//     - updateDetails()
//     - updateNav()
//     - enableKeyboardNav()
//     - disableKeyboardNav()
//     - keyboardNavAction()
//     - preloadNeighborImages()
//     - end()
//
//     Structuring of code inspired by Scott Upton (http://www.uptonic.com/)
//
var Lightbox = Class.create();

Lightbox.prototype = {

       // initialize()
       // Constructor runs on completion of the DOM loading. Loops through anchor tags looking for
       // 'lightbox' references and applies onclick events to appropriate links. The 2nd section of
       // the function inserts html at the bottom of the page which is used to display the shadow
       // overlay and the image container.
       //
       initialize: function() {
               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];

                       var relAttribute = String(anchor.getAttribute('rel'));

                       // use the string.match() method to catch 'lightbox' references in the rel attribute
                       if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
                               anchor.onclick = function () {myLightbox.start(this); return false;}
                       }
               }

               // The rest of this code inserts html at the bottom of the page that looks similar to this:
               //
               //      <div id="overlay"></div>
               //      <div id="lightbox">
               //              <div id="outerImageContainer">
               //                      <div id="imageContainer">
               //                              <img id="lightboxImage">
               //                              <div style="" id="hoverNav">
               //                                      <a href="#" id="prevLink"></a>
               //                                      <a href="#" id="nextLink"></a>
               //                              </div>
               //                              <div id="loading">
               //                                      <a href="#" id="loadingLink">
               //                                              <img src="images/loading.gif">
               //                                      </a>
               //                              </div>
               //                      </div>
               //              </div>
               //              <div id="imageDataContainer">
               //                      <div id="imageData">
               //                              <div id="imageDetails">
               //                                      <span id="caption"></span>
               //                                      <span id="numberDisplay"></span>
               //                              </div>
               //                              <div id="bottomNav">
               //                                      <a href="#" id="bottomNavClose">
               //                                              <img src="images/close.gif">
               //                                      </a>
               //                              </div>
               //                      </div>
               //              </div>
               //      </div>


               var objBody = document.getElementsByTagName("body").item(0);

               var objOverlay = document.createElement("div");
               objOverlay.setAttribute('id','overlay');
               objOverlay.style.display = 'none';
               objOverlay.onclick = function() { myLightbox.end(); return false; }
               objBody.appendChild(objOverlay);

               var objLightbox = document.createElement("div");
               objLightbox.setAttribute('id','lightbox');
               objLightbox.style.display = 'none';
               objBody.appendChild(objLightbox);

               var objOuterImageContainer = document.createElement("div");
               objOuterImageContainer.setAttribute('id','outerImageContainer');
               objLightbox.appendChild(objOuterImageContainer);

               var objImageContainer = document.createElement("div");
               objImageContainer.setAttribute('id','imageContainer');
               objOuterImageContainer.appendChild(objImageContainer);

               var objLightboxImage = document.createElement("img");
               objLightboxImage.setAttribute('id','lightboxImage');
               objImageContainer.appendChild(objLightboxImage);

               var objHoverNav = document.createElement("div");
               objHoverNav.setAttribute('id','hoverNav');
               objImageContainer.appendChild(objHoverNav);

               var objPrevLink = document.createElement("a");
               objPrevLink.setAttribute('id','prevLink');
               objPrevLink.setAttribute('href','#');
               objHoverNav.appendChild(objPrevLink);

               var objNextLink = document.createElement("a");
               objNextLink.setAttribute('id','nextLink');
               objNextLink.setAttribute('href','#');
               objHoverNav.appendChild(objNextLink);

               var objLoading = document.createElement("div");
               objLoading.setAttribute('id','loading');
               objImageContainer.appendChild(objLoading);

               var objLoadingLink = document.createElement("a");
               objLoadingLink.setAttribute('id','loadingLink');
               objLoadingLink.setAttribute('href','#');
               objLoadingLink.onclick = function() { myLightbox.end(); return false; }
               objLoading.appendChild(objLoadingLink);

               var objLoadingImage = document.createElement("img");
               objLoadingImage.setAttribute('src', fileLoadingImage);
               objLoadingLink.appendChild(objLoadingImage);

               var objImageDataContainer = document.createElement("div");
               objImageDataContainer.setAttribute('id','imageDataContainer');
               objImageDataContainer.className = 'clearfix';
               objLightbox.appendChild(objImageDataContainer);

               var objImageData = document.createElement("div");
               objImageData.setAttribute('id','imageData');
               objImageDataContainer.appendChild(objImageData);

               var objImageDetails = document.createElement("div");
               objImageDetails.setAttribute('id','imageDetails');
               objImageData.appendChild(objImageDetails);

               var objCaption = document.createElement("span");
               objCaption.setAttribute('id','caption');
               objImageDetails.appendChild(objCaption);

               var objNumberDisplay = document.createElement("span");
               objNumberDisplay.setAttribute('id','numberDisplay');
               objImageDetails.appendChild(objNumberDisplay);

               var objBottomNav = document.createElement("div");
               objBottomNav.setAttribute('id','bottomNav');
               objImageData.appendChild(objBottomNav);

               var objBottomNavCloseLink = document.createElement("a");
               objBottomNavCloseLink.setAttribute('id','bottomNavClose');
               objBottomNavCloseLink.setAttribute('href','#');
               objBottomNavCloseLink.onclick = function() { myLightbox.end(); return false; }
               objBottomNav.appendChild(objBottomNavCloseLink);

               var objBottomNavCloseImage = document.createElement("img");
               objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage);
               objBottomNavCloseLink.appendChild(objBottomNavCloseImage);
       },

       //
       //      start()
       //      Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
       //
       start: function(imageLink) {

               hideSelectBoxes();

               // stretch overlay to fill page and fade in
               var arrayPageSize = getPageSize();
               Element.setHeight('overlay', arrayPageSize[1]);
               new Effect.Appear('overlay', { duration: 0.2, from: 0.0, to: 0.8 });

               imageArray = [];
               imageNum = 0;

               if (!document.getElementsByTagName){ return; }
               var anchors = document.getElementsByTagName('a');

               // if image is NOT part of a set..
               if((imageLink.getAttribute('rel') == 'lightbox')){
                       // add single image to imageArray
                       imageArray.push(new Array(imageLink.getAttribute('href'), imageLink.getAttribute('title')));
               } else {
               // if image is part of a set..

                       // loop through anchors, find other images in set, and add them to imageArray
                       for (var i=0; i<anchors.length; i++){
                               var anchor = anchors[i];
                               if (anchor.getAttribute('href') && (anchor.getAttribute('rel') == imageLink.getAttribute('rel'))){
                                       imageArray.push(new Array(anchor.getAttribute('href'), anchor.getAttribute('title')));
                               }
                       }
                       imageArray.removeDuplicates();
                       while(imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++;}
               }

               // calculate top offset for the lightbox and display
               var arrayPageSize = getPageSize();
               var arrayPageScroll = getPageScroll();
               var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 15);

               Element.setTop('lightbox', lightboxTop);
               Element.show('lightbox');

               this.changeImage(imageNum);
       },

       //
       //      changeImage()
       //      Hide most elements and preload image in preparation for resizing image container.
       //
       changeImage: function(imageNum) {

               activeImage = imageNum; // update global var

               // hide elements during transition
               Element.show('loading');
               Element.hide('lightboxImage');
               Element.hide('hoverNav');
               Element.hide('prevLink');
               Element.hide('nextLink');
               Element.hide('imageDataContainer');
               Element.hide('numberDisplay');

               imgPreloader = new Image();

               // once image is preloaded, resize image container
               imgPreloader.onload=function(){
                       Element.setSrc('lightboxImage', imageArray[activeImage][0]);
                       myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);
               }
               imgPreloader.src = imageArray[activeImage][0];
       },

       //
       //      resizeImageContainer()
       //
       resizeImageContainer: function( imgWidth, imgHeight) {

               // get current height and width
               this.wCur = Element.getWidth('outerImageContainer');
               this.hCur = Element.getHeight('outerImageContainer');

               // scalars based on change from old to new
               this.xScale = ((imgWidth  + (borderSize * 2)) / this.wCur) * 100;
               this.yScale = ((imgHeight  + (borderSize * 2)) / this.hCur) * 100;

               // calculate size difference between new and old image, and resize if necessary
               wDiff = (this.wCur - borderSize * 2) - imgWidth;
               hDiff = (this.hCur - borderSize * 2) - imgHeight;

               if(!( hDiff == 0)){ new Effect.Scale('outerImageContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'}); }
               if(!( wDiff == 0)){ new Effect.Scale('outerImageContainer', this.xScale, {scaleY: false, delay: resizeDuration, duration: resizeDuration}); }

               // if new and old image are same size and no scaling transition is necessary,
               // do a quick pause to prevent image flicker.
               if((hDiff == 0) && (wDiff == 0)){
                       if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);}
               }

               Element.setHeight('prevLink', imgHeight);
               Element.setHeight('nextLink', imgHeight);
               Element.setWidth( 'imageDataContainer', imgWidth + (borderSize * 2));

               this.showImage();
       },

       //
       //      showImage()
       //      Display image and begin preloading neighbors.
       //
       showImage: function(){
               Element.hide('loading');
               new Effect.Appear('lightboxImage', { duration: 0.5, queue: 'end', afterFinish: function(){      myLightbox.updateDetails(); } });
               this.preloadNeighborImages();
       },

       //
       //      updateDetails()
       //      Display caption, image number, and bottom nav.
       //
       updateDetails: function() {

               Element.show('caption');
               Element.setInnerHTML( 'caption', imageArray[activeImage][1]);

               // if image is part of set display 'Image x of x'
               if(imageArray.length > 1){
                       Element.show('numberDisplay');
                       Element.setInnerHTML( 'numberDisplay', "Image " + eval(activeImage + 1) + " of " + imageArray.length);
               }

               new Effect.Parallel(
                       [ new Effect.SlideDown( 'imageDataContainer', { sync: true, duration: resizeDuration + 0.25, from: 0.0, to: 1.0 }),
                         new Effect.Appear('imageDataContainer', { sync: true, duration: 1.0 }) ],
                       { duration: 0.65, afterFinish: function() { myLightbox.updateNav();} }
               );
       },

       //
       //      updateNav()
       //      Display appropriate previous and next hover navigation.
       //
       updateNav: function() {

               Element.show('hoverNav');

               // if not first image in set, display prev image button
               if(activeImage != 0){
                       Element.show('prevLink');
                       document.getElementById('prevLink').onclick = function() {
                               myLightbox.changeImage(activeImage - 1); return false;
                       }
               }

               // if not last image in set, display next image button
               if(activeImage != (imageArray.length - 1)){
                       Element.show('nextLink');
                       document.getElementById('nextLink').onclick = function() {
                               myLightbox.changeImage(activeImage + 1); return false;
                       }
               }

               this.enableKeyboardNav();
       },

       //
       //      enableKeyboardNav()
       //
       enableKeyboardNav: function() {
               document.onkeydown = this.keyboardAction;
       },

       //
       //      disableKeyboardNav()
       //
       disableKeyboardNav: function() {
               document.onkeydown = '';
       },

       //
       //      keyboardAction()
       //
       keyboardAction: function(e) {
               if (e == null) { // ie
                       keycode = event.keyCode;
               } else { // mozilla
                       keycode = e.which;
               }

               key = String.fromCharCode(keycode).toLowerCase();

               if((key == 'x') || (key == 'o') || (key == 'c')){       // close lightbox
                       myLightbox.end();
               } else if(key == 'p'){  // display previous image
                       if(activeImage != 0){
                               myLightbox.disableKeyboardNav();
                               myLightbox.changeImage(activeImage - 1);
                       }
               } else if(key == 'n'){  // display next image
                       if(activeImage != (imageArray.length - 1)){
                               myLightbox.disableKeyboardNav();
                               myLightbox.changeImage(activeImage + 1);
                       }
               }


       },

       //
       //      preloadNeighborImages()
       //      Preload previous and next images.
       //
       preloadNeighborImages: function(){

               if((imageArray.length - 1) > activeImage){
                       preloadNextImage = new Image();
                       preloadNextImage.src = imageArray[activeImage + 1][0];
               }
               if(activeImage > 0){
                       preloadPrevImage = new Image();
                       preloadPrevImage.src = imageArray[activeImage - 1][0];
               }

       },

       //
       //      end()
       //
       end: function() {
               this.disableKeyboardNav();
               Element.hide('lightbox');
               new Effect.Fade('overlay', { duration: 0.2});
               showSelectBoxes();
       }
}

// -----------------------------------------------------------------------------------

//
// 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;
}

// -----------------------------------------------------------------------------------

//
// 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'){
       }
}

// -----------------------------------------------------------------------------------

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

// ---------------------------------------------------

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

// ---------------------------------------------------

function hideSelectBoxes(){
       selects = document.getElementsByTagName("select");
       for (i = 0; i != selects.length; i++) {
               selects[i].style.visibility = "hidden";
       }
}

// ---------------------------------------------------

//
// 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;
       }
}

// ---------------------------------------------------



function initLightbox() { myLightbox = new Lightbox(); }
Event.observe(window, 'load', initLightbox, false);