758 lines
22 KiB
JavaScript
758 lines
22 KiB
JavaScript
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//
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// Configuration
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//
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var fileLoadingImage = "loading.gif";
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var fileBottomNavCloseImage = "closelabel.gif";
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var overlayOpacity = 0.1; // controls transparency of shadow overlay
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var animate = true; // toggles resizing animations
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var resizeSpeed = 7; // controls the speed of the image resizing animations (1=slowest and 10=fastest)
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var borderSize = 6; //if you adjust the padding in the CSS, you will need to update this variable
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// -----------------------------------------------------------------------------------
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//
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// Global Variables
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//
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var imageArray = new Array;
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var activeImage;
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if(animate == true){
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overlayDuration = 0.2; // shadow fade in/out duration
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if(resizeSpeed > 10){ resizeSpeed = 10;}
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if(resizeSpeed < 1){ resizeSpeed = 1;}
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resizeDuration = (11 - resizeSpeed) * 0.15;
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} else {
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overlayDuration = 0;
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resizeDuration = 0;
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}
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// -----------------------------------------------------------------------------------
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//
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// Additional methods for Element added by SU, Couloir
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// - further additions by Lokesh Dhakar (huddletogether.com)
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//
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Object.extend(Element, {
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getWidth: function(element) {
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element = $(element);
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return element.offsetWidth;
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},
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setWidth: function(element,w) {
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element = $(element);
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element.style.width = w +"px";
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},
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setHeight: function(element,h) {
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element = $(element);
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element.style.height = h +"px";
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},
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setTop: function(element,t) {
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element = $(element);
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element.style.top = t +"px";
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},
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setLeft: function(element,l) {
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element = $(element);
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element.style.left = l +"px";
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},
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setSrc: function(element,src) {
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element = $(element);
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element.src = src;
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},
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setHref: function(element,href) {
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element = $(element);
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element.href = href;
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},
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setInnerHTML: function(element,content) {
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element = $(element);
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element.innerHTML = content;
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}
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});
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// -----------------------------------------------------------------------------------
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//
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// Extending built-in Array object
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// - array.removeDuplicates()
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// - array.empty()
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//
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Array.prototype.removeDuplicates = function () {
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for(i = 0; i < this.length; i++){
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for(j = this.length-1; j>i; j--){
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if(this[i][0] == this[j][0]){
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this.splice(j,1);
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}
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}
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}
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}
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// -----------------------------------------------------------------------------------
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Array.prototype.empty = function () {
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for(i = 0; i <= this.length; i++){
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this.shift();
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}
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}
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// -----------------------------------------------------------------------------------
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//
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// Lightbox Class Declaration
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// - initialize()
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// - start()
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// - changeImage()
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// - resizeImageContainer()
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// - showImage()
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// - updateDetails()
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// - updateNav()
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// - enableKeyboardNav()
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// - disableKeyboardNav()
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// - keyboardNavAction()
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// - preloadNeighborImages()
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// - end()
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//
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// Structuring of code inspired by Scott Upton (http://www.uptonic.com/)
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//
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var Lightbox = Class.create();
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Lightbox.prototype = {
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// initialize()
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// Constructor runs on completion of the DOM loading. Calls updateImageList and then
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// the function inserts html at the bottom of the page which is used to display the shadow
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// overlay and the image container.
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//
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initialize: function() {
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this.updateImageList();
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// Code inserts html at the bottom of the page that looks similar to this:
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//
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// <div id="overlay"></div>
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// <div id="lightbox">
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// <div id="outerImageContainer">
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// <div id="imageContainer">
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// <img id="lightboxImage">
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// <div style="" id="hoverNav">
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// <a href="#" id="prevLink"></a>
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// <a href="#" id="nextLink"></a>
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// </div>
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// <div id="loading">
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// <a href="#" id="loadingLink">
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// <img src="images/loading.gif">
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// </a>
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// </div>
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// </div>
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// </div>
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// <div id="imageDataContainer">
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// <div id="imageData">
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// <div id="imageDetails">
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// <span id="caption"></span>
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// <span id="numberDisplay"></span>
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// </div>
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// <div id="bottomNav">
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// <a href="#" id="bottomNavClose">
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// <img src="images/close.gif">
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// </a>
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// </div>
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// </div>
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// </div>
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// </div>
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var objBody = document.getElementsByTagName("body").item(0);
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var objOverlay = document.createElement("div");
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objOverlay.setAttribute('id','overlay');
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objOverlay.style.display = 'none';
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objOverlay.onclick = function() { myLightbox.end(); }
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objBody.appendChild(objOverlay);
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var objLightbox = document.createElement("div");
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objLightbox.setAttribute('id','lightbox');
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objLightbox.style.display = 'none';
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objLightbox.onclick = function(e) { // close Lightbox is user clicks shadow overlay
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if (!e) var e = window.event;
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var clickObj = Event.element(e).id;
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if ( clickObj == 'lightbox') {
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myLightbox.end();
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}
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};
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objBody.appendChild(objLightbox);
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var objOuterImageContainer = document.createElement("div");
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objOuterImageContainer.setAttribute('id','outerImageContainer');
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objLightbox.appendChild(objOuterImageContainer);
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// When Lightbox starts it will resize itself from 250 by 250 to the current image dimension.
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// If animations are turned off, it will be hidden as to prevent a flicker of a
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// white 250 by 250 box.
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if(animate){
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Element.setWidth('outerImageContainer', 250);
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Element.setHeight('outerImageContainer', 250);
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} else {
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Element.setWidth('outerImageContainer', 1);
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Element.setHeight('outerImageContainer', 1);
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}
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var objImageContainer = document.createElement("div");
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objImageContainer.setAttribute('id','imageContainer');
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objOuterImageContainer.appendChild(objImageContainer);
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var objLightboxImage = document.createElement("img");
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objLightboxImage.setAttribute('id','lightboxImage');
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objImageContainer.appendChild(objLightboxImage);
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var objHoverNav = document.createElement("div");
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objHoverNav.setAttribute('id','hoverNav');
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objImageContainer.appendChild(objHoverNav);
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var objPrevLink = document.createElement("a");
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objPrevLink.setAttribute('id','prevLink');
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objPrevLink.setAttribute('href','#');
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objHoverNav.appendChild(objPrevLink);
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var objNextLink = document.createElement("a");
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objNextLink.setAttribute('id','nextLink');
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objNextLink.setAttribute('href','#');
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objHoverNav.appendChild(objNextLink);
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var objLoading = document.createElement("div");
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objLoading.setAttribute('id','loading');
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objImageContainer.appendChild(objLoading);
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var objLoadingLink = document.createElement("a");
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objLoadingLink.setAttribute('id','loadingLink');
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objLoadingLink.setAttribute('href','#');
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objLoadingLink.onclick = function() { myLightbox.end(); return false; }
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objLoading.appendChild(objLoadingLink);
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var objLoadingImage = document.createElement("img");
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objLoadingImage.setAttribute('src', fileLoadingImage);
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objLoadingLink.appendChild(objLoadingImage);
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var objImageDataContainer = document.createElement("div");
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objImageDataContainer.setAttribute('id','imageDataContainer');
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objLightbox.appendChild(objImageDataContainer);
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var objImageData = document.createElement("div");
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objImageData.setAttribute('id','imageData');
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objImageDataContainer.appendChild(objImageData);
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var objImageDetails = document.createElement("div");
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objImageDetails.setAttribute('id','imageDetails');
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objImageData.appendChild(objImageDetails);
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var objCaption = document.createElement("span");
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objCaption.setAttribute('id','caption');
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objImageDetails.appendChild(objCaption);
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var objNumberDisplay = document.createElement("span");
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objNumberDisplay.setAttribute('id','numberDisplay');
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objImageDetails.appendChild(objNumberDisplay);
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var objBottomNav = document.createElement("div");
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objBottomNav.setAttribute('id','bottomNav');
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objImageData.appendChild(objBottomNav);
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var objBottomNavCloseLink = document.createElement("a");
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objBottomNavCloseLink.setAttribute('id','bottomNavClose');
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objBottomNavCloseLink.setAttribute('href','#');
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objBottomNavCloseLink.onclick = function() { myLightbox.end(); return false; }
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objBottomNav.appendChild(objBottomNavCloseLink);
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var objBottomNavCloseImage = document.createElement("img");
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objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage);
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objBottomNavCloseLink.appendChild(objBottomNavCloseImage);
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},
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//
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// updateImageList()
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// Loops through anchor tags looking for 'lightbox' references and applies onclick
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// events to appropriate links. You can rerun after dynamically adding images w/ajax.
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//
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updateImageList: function() {
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if (!document.getElementsByTagName){ return; }
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var anchors = document.getElementsByTagName('a');
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var areas = document.getElementsByTagName('area');
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// loop through all anchor tags
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for (var i=0; i<anchors.length; i++){
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var anchor = anchors[i];
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var relAttribute = String(anchor.getAttribute('rel'));
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// use the string.match() method to catch 'lightbox' references in the rel attribute
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if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
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anchor.onclick = function () {myLightbox.start(this); return false;}
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}
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}
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// loop through all area tags
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// todo: combine anchor & area tag loops
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for (var i=0; i< areas.length; i++){
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var area = areas[i];
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var relAttribute = String(area.getAttribute('rel'));
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// use the string.match() method to catch 'lightbox' references in the rel attribute
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if (area.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
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area.onclick = function () {myLightbox.start(this); return false;}
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}
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}
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},
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//
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// start()
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// Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
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//
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start: function(imageLink) {
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hideSelectBoxes();
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hideFlash();
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// stretch overlay to fill page and fade in
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var arrayPageSize = getPageSize();
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Element.setWidth('overlay', arrayPageSize[0]);
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Element.setHeight('overlay', arrayPageSize[1]);
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new Effect.Appear('overlay', { duration: overlayDuration, from: 0.0, to: overlayOpacity });
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imageArray = [];
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imageNum = 0;
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if (!document.getElementsByTagName){ return; }
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var anchors = document.getElementsByTagName( imageLink.tagName);
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// if image is NOT part of a set..
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if((imageLink.getAttribute('rel') == 'lightbox')){
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// add single image to imageArray
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imageArray.push(new Array(imageLink.getAttribute('href'), imageLink.getAttribute('title')));
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} else {
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// if image is part of a set..
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// loop through anchors, find other images in set, and add them to imageArray
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for (var i=0; i<anchors.length; i++){
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var anchor = anchors[i];
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if (anchor.getAttribute('href') && (anchor.getAttribute('rel') == imageLink.getAttribute('rel'))){
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imageArray.push(new Array(anchor.getAttribute('href'), anchor.getAttribute('title')));
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}
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}
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imageArray.removeDuplicates();
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while(imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++;}
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}
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// calculate top and left offset for the lightbox
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var arrayPageScroll = getPageScroll();
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var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 20);
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var lightboxLeft = arrayPageScroll[0];
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Element.setTop('lightbox', lightboxTop);
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Element.setLeft('lightbox', lightboxLeft);
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Element.show('lightbox');
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this.changeImage(imageNum);
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},
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//
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// changeImage()
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// Hide most elements and preload image in preparation for resizing image container.
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//
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changeImage: function(imageNum) {
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activeImage = imageNum; // update global var
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// hide elements during transition
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if(animate){ Element.show('loading');}
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Element.hide('lightboxImage');
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Element.hide('hoverNav');
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Element.hide('prevLink');
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Element.hide('nextLink');
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Element.hide('imageDataContainer');
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Element.hide('numberDisplay');
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imgPreloader = new Image();
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// once image is preloaded, resize image container
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imgPreloader.onload=function(){
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Element.setSrc('lightboxImage', imageArray[activeImage][0]);
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myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);
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imgPreloader.onload=function(){}; // clear onLoad, IE behaves irratically with animated gifs otherwise
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}
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imgPreloader.src = imageArray[activeImage][0];
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},
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//
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// resizeImageContainer()
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//
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resizeImageContainer: function( imgWidth, imgHeight) {
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// get curren width and height
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this.widthCurrent = Element.getWidth('outerImageContainer');
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this.heightCurrent = Element.getHeight('outerImageContainer');
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// get new width and height
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var widthNew = (imgWidth + (borderSize * 2));
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var heightNew = (imgHeight + (borderSize * 2));
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// scalars based on change from old to new
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this.xScale = ( widthNew / this.widthCurrent) * 100;
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this.yScale = ( heightNew / this.heightCurrent) * 100;
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// calculate size difference between new and old image, and resize if necessary
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wDiff = this.widthCurrent - widthNew;
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hDiff = this.heightCurrent - heightNew;
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if(!( hDiff == 0)){ new Effect.Scale('outerImageContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'}); }
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if(!( wDiff == 0)){ new Effect.Scale('outerImageContainer', this.xScale, {scaleY: false, delay: resizeDuration, duration: resizeDuration}); }
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// if new and old image are same size and no scaling transition is necessary,
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// do a quick pause to prevent image flicker.
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if((hDiff == 0) && (wDiff == 0)){
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if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);}
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}
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Element.setHeight('prevLink', imgHeight);
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Element.setHeight('nextLink', imgHeight);
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Element.setWidth( 'imageDataContainer', widthNew);
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this.showImage();
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},
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//
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// showImage()
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// Display image and begin preloading neighbors.
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//
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showImage: function(){
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Element.hide('loading');
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new Effect.Appear('lightboxImage', { duration: resizeDuration, queue: 'end', afterFinish: function(){ myLightbox.updateDetails(); } });
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this.preloadNeighborImages();
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},
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//
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// updateDetails()
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// Display caption, image number, and bottom nav.
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//
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updateDetails: function() {
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// if caption is not null
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if(imageArray[activeImage][1]){
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Element.show('caption');
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Element.setInnerHTML( 'caption', imageArray[activeImage][1]);
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}
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// if image is part of set display 'Image x of x'
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if(imageArray.length > 1){
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Element.show('numberDisplay');
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Element.setInnerHTML( 'numberDisplay', "Bild " + eval(activeImage + 1) + " von " + imageArray.length);
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}
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new Effect.Parallel(
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[ new Effect.SlideDown( 'imageDataContainer', { sync: true, duration: resizeDuration, from: 0.0, to: 1.0 }),
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new Effect.Appear('imageDataContainer', { sync: true, duration: resizeDuration }) ],
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{ duration: resizeDuration, afterFinish: function() {
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// update overlay size and update nav
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var arrayPageSize = getPageSize();
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Element.setHeight('overlay', arrayPageSize[1]);
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myLightbox.updateNav();
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}
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}
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);
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},
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//
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// updateNav()
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// Display appropriate previous and next hover navigation.
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//
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updateNav: function() {
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Element.show('hoverNav');
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// if not first image in set, display prev image button
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if(activeImage != 0){
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Element.show('prevLink');
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document.getElementById('prevLink').onclick = function() {
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myLightbox.changeImage(activeImage - 1); return false;
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}
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}
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// if not last image in set, display next image button
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if(activeImage != (imageArray.length - 1)){
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Element.show('nextLink');
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document.getElementById('nextLink').onclick = function() {
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myLightbox.changeImage(activeImage + 1); return false;
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}
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}
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this.enableKeyboardNav();
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},
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//
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// enableKeyboardNav()
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//
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enableKeyboardNav: function() {
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document.onkeydown = this.keyboardAction;
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},
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//
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// disableKeyboardNav()
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//
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disableKeyboardNav: function() {
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document.onkeydown = '';
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},
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//
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// keyboardAction()
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//
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keyboardAction: function(e) {
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if (e == null) { // ie
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keycode = event.keyCode;
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escapeKey = 27;
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} else { // mozilla
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keycode = e.keyCode;
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escapeKey = e.DOM_VK_ESCAPE;
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}
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key = String.fromCharCode(keycode).toLowerCase();
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if((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)){ // close lightbox
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myLightbox.end();
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} else if((key == 'p') || (keycode == 37)){ // display previous image
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if(activeImage != 0){
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myLightbox.disableKeyboardNav();
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myLightbox.changeImage(activeImage - 1);
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}
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} else if((key == 'n') || (keycode == 39)){ // display next image
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if(activeImage != (imageArray.length - 1)){
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myLightbox.disableKeyboardNav();
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myLightbox.changeImage(activeImage + 1);
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}
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}
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},
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//
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// preloadNeighborImages()
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// 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: overlayDuration});
|
|
showSelectBoxes();
|
|
showFlash();
|
|
}
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------------
|
|
|
|
//
|
|
// getPageScroll()
|
|
// Returns array with x,y page scroll values.
|
|
// Core code from - quirksmode.com
|
|
//
|
|
function getPageScroll(){
|
|
|
|
var xScroll, yScroll;
|
|
|
|
if (self.pageYOffset) {
|
|
yScroll = self.pageYOffset;
|
|
xScroll = self.pageXOffset;
|
|
} else if (document.documentElement && document.documentElement.scrollTop){ // Explorer 6 Strict
|
|
yScroll = document.documentElement.scrollTop;
|
|
xScroll = document.documentElement.scrollLeft;
|
|
} else if (document.body) {// all other Explorers
|
|
yScroll = document.body.scrollTop;
|
|
xScroll = document.body.scrollLeft;
|
|
}
|
|
|
|
arrayPageScroll = new Array(xScroll,yScroll)
|
|
return arrayPageScroll;
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------------
|
|
|
|
//
|
|
// getPageSize()
|
|
// Returns array with page width, height and window width, height
|
|
// Core code from - quirksmode.com
|
|
// Edit for Firefox by pHaez
|
|
//
|
|
function getPageSize(){
|
|
|
|
var xScroll, yScroll;
|
|
|
|
if (window.innerHeight && window.scrollMaxY) {
|
|
xScroll = window.innerWidth + window.scrollMaxX;
|
|
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;
|
|
|
|
// console.log(self.innerWidth);
|
|
// console.log(document.documentElement.clientWidth);
|
|
|
|
if (self.innerHeight) { // all except Explorer
|
|
if(document.documentElement.clientWidth){
|
|
windowWidth = document.documentElement.clientWidth;
|
|
} else {
|
|
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;
|
|
}
|
|
|
|
// console.log("xScroll " + xScroll)
|
|
// console.log("windowWidth " + windowWidth)
|
|
|
|
// for small pages with total width less then width of the viewport
|
|
if(xScroll < windowWidth){
|
|
pageWidth = xScroll;
|
|
} else {
|
|
pageWidth = windowWidth;
|
|
}
|
|
// console.log("pageWidth " + pageWidth)
|
|
|
|
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(){
|
|
var selects = document.getElementsByTagName("select");
|
|
for (i = 0; i != selects.length; i++) {
|
|
selects[i].style.visibility = "visible";
|
|
}
|
|
}
|
|
|
|
// ---------------------------------------------------
|
|
|
|
function hideSelectBoxes(){
|
|
var selects = document.getElementsByTagName("select");
|
|
for (i = 0; i != selects.length; i++) {
|
|
selects[i].style.visibility = "hidden";
|
|
}
|
|
}
|
|
|
|
// ---------------------------------------------------
|
|
|
|
function showFlash(){
|
|
var flashObjects = document.getElementsByTagName("object");
|
|
for (i = 0; i < flashObjects.length; i++) {
|
|
flashObjects[i].style.visibility = "visible";
|
|
}
|
|
|
|
var flashEmbeds = document.getElementsByTagName("embed");
|
|
for (i = 0; i < flashEmbeds.length; i++) {
|
|
flashEmbeds[i].style.visibility = "visible";
|
|
}
|
|
}
|
|
|
|
// ---------------------------------------------------
|
|
|
|
function hideFlash(){
|
|
var flashObjects = document.getElementsByTagName("object");
|
|
for (i = 0; i < flashObjects.length; i++) {
|
|
flashObjects[i].style.visibility = "hidden";
|
|
}
|
|
|
|
var flashEmbeds = document.getElementsByTagName("embed");
|
|
for (i = 0; i < flashEmbeds.length; i++) {
|
|
flashEmbeds[i].style.visibility = "hidden";
|
|
}
|
|
|
|
}
|
|
|
|
|
|
// ---------------------------------------------------
|
|
|
|
//
|
|
// pause(numberMillis)
|
|
// Pauses code execution for specified time. Uses busy code, not good.
|
|
// Help from Ran Bar-On [ran2103@gmail.com]
|
|
//
|
|
|
|
function pause(ms){
|
|
var date = new Date();
|
|
curDate = null;
|
|
do{var curDate = new Date();}
|
|
while( curDate - date < ms);
|
|
}
|
|
/*
|
|
function pause(numberMillis) {
|
|
var curently = new Date().getTime() + sender;
|
|
while (new Date().getTime();
|
|
}
|
|
*/
|
|
// ---------------------------------------------------
|
|
|
|
|
|
|
|
function initLightbox() { myLightbox = new Lightbox(); }
|
|
Event.observe(window, 'load', initLightbox, false); |