[1349] | 1 | /*
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| 2 | Lightbox JS: Fullsize Image Overlays
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| 3 | by Lokesh Dhakar - http://www.huddletogether.com
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| 4 |
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| 5 | For more information on this script, visit:
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| 6 | http://huddletogether.com/projects/lightbox/
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| 7 |
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| 8 | Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
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| 9 | (basically, do anything you want, just leave my name and link)
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| 10 |
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| 11 | Table of Contents
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| 12 | -----------------
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| 13 | Configuration
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| 14 |
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| 15 | Functions
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| 16 | - getPageScroll()
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| 17 | - getPageSize()
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| 18 | - pause()
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| 19 | - getKey()
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| 20 | - listenKey()
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| 21 | - showLightbox()
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| 22 | - hideLightbox()
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| 23 | - initLightbox()
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| 24 | - addLoadEvent()
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| 25 |
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| 26 | Function Calls
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| 27 | - addLoadEvent(initLightbox)
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| 28 |
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| 29 | */
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| 30 |
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| 31 |
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| 32 |
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| 33 | //
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| 34 | // Configuration
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| 35 | //
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| 36 |
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| 37 | // If you would like to use a custom loading image or close button reference them in the next two lines.
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| 38 | var loadingImage = 'workflow/templateFile.php?file=images/lb_loading.gif';
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| 39 | var closeButton = 'workflow/templateFile.php?file=images/lb_close.gif';
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| 40 |
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| 41 |
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| 42 |
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| 43 |
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| 44 |
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| 45 | //
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| 46 | // getPageScroll()
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| 47 | // Returns array with x,y page scroll values.
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| 48 | // Core code from - quirksmode.org
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| 49 | //
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| 50 | function getPageScroll(){
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| 51 |
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| 52 | var yScroll;
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| 53 |
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| 54 | if (self.pageYOffset) {
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| 55 | yScroll = self.pageYOffset;
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| 56 | } else if (document.documentElement && document.documentElement.scrollTop){ // Explorer 6 Strict
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| 57 | yScroll = document.documentElement.scrollTop;
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| 58 | } else if (document.body) {// all other Explorers
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| 59 | yScroll = document.body.scrollTop;
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| 60 | }
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| 61 |
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| 62 | arrayPageScroll = new Array('',yScroll)
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| 63 | return arrayPageScroll;
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| 64 | }
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| 65 |
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| 66 |
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| 67 |
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| 68 | //
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| 69 | // getPageSize()
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| 70 | // Returns array with page width, height and window width, height
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| 71 | // Core code from - quirksmode.org
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| 72 | // Edit for Firefox by pHaez
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| 73 | //
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| 74 | function getPageSize(){
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| 75 |
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| 76 | var xScroll, yScroll;
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| 77 |
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| 78 | if (window.innerHeight && window.scrollMaxY) {
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| 79 | xScroll = document.body.scrollWidth;
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| 80 | yScroll = window.innerHeight + window.scrollMaxY;
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| 81 | } else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
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| 82 | xScroll = document.body.scrollWidth;
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| 83 | yScroll = document.body.scrollHeight;
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| 84 | } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
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| 85 | xScroll = document.body.offsetWidth;
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| 86 | yScroll = document.body.offsetHeight;
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| 87 | }
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| 88 |
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| 89 | var windowWidth, windowHeight;
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| 90 | if (self.innerHeight) { // all except Explorer
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| 91 | windowWidth = self.innerWidth;
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| 92 | windowHeight = self.innerHeight;
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| 93 | } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
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| 94 | windowWidth = document.documentElement.clientWidth;
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| 95 | windowHeight = document.documentElement.clientHeight;
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| 96 | } else if (document.body) { // other Explorers
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| 97 | windowWidth = document.body.clientWidth;
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| 98 | windowHeight = document.body.clientHeight;
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| 99 | }
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| 100 |
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| 101 | // for small pages with total height less then height of the viewport
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| 102 | if(yScroll < windowHeight){
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| 103 | pageHeight = windowHeight;
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| 104 | } else {
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| 105 | pageHeight = yScroll;
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| 106 | }
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| 107 |
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| 108 | // for small pages with total width less then width of the viewport
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| 109 | if(xScroll < windowWidth){
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| 110 | pageWidth = windowWidth;
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| 111 | } else {
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| 112 | pageWidth = xScroll;
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| 113 | }
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| 114 |
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| 115 |
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| 116 | arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
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| 117 | return arrayPageSize;
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| 118 | }
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| 119 |
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| 120 |
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| 121 | //
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| 122 | // pause(numberMillis)
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| 123 | // Pauses code execution for specified time. Uses busy code, not good.
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| 124 | // Code from http://www.faqts.com/knowledge_base/view.phtml/aid/1602
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| 125 | //
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| 126 | function pause(numberMillis) {
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| 127 | var now = new Date();
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| 128 | var exitTime = now.getTime() + numberMillis;
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| 129 | while (true) {
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| 130 | now = new Date();
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| 131 | if (now.getTime() > exitTime)
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| 132 | return;
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| 133 | }
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| 134 | }
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| 135 |
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| 136 | //
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| 137 | // getKey(key)
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| 138 | // Gets keycode. If 'x' is pressed then it hides the lightbox.
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| 139 | //
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| 140 |
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| 141 | function getKey(e){
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| 142 | if (e == null) { // ie
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| 143 | keycode = event.keyCode;
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| 144 | } else { // mozilla
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| 145 | keycode = e.which;
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| 146 | }
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| 147 | key = String.fromCharCode(keycode).toLowerCase();
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| 148 |
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| 149 | if(key == 'x'){ hideLightbox(); }
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| 150 | }
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| 151 |
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| 152 |
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| 153 | //
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| 154 | // listenKey()
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| 155 | //
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| 156 | function listenKey () { document.onkeypress = getKey; }
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| 157 |
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| 158 |
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| 159 | //
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| 160 | // showLightbox()
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| 161 | // Preloads images. Pleaces new image in lightbox then centers and displays.
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| 162 | //
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| 163 | function showLightbox(objLink)
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| 164 | {
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| 165 | // prep objects
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| 166 | var objOverlay = document.getElementById('overlay');
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| 167 | var objLightbox = document.getElementById('lightbox');
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| 168 | var objCaption = document.getElementById('lightboxCaption');
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| 169 | var objImage = document.getElementById('lightboxImage');
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| 170 | var objLoadingImage = document.getElementById('loadingImage');
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| 171 | var objLightboxDetails = document.getElementById('lightboxDetails');
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| 172 |
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| 173 |
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| 174 | var arrayPageSize = getPageSize();
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| 175 | var arrayPageScroll = getPageScroll();
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| 176 |
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| 177 | // center loadingImage if it exists
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| 178 | if (objLoadingImage) {
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| 179 | objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px');
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| 180 | objLoadingImage.style.left = (((arrayPageSize[0] - 20 - objLoadingImage.width) / 2) + 'px');
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| 181 | objLoadingImage.style.display = 'block';
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| 182 | }
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| 183 |
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| 184 | // set height of Overlay to take up whole page and show
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| 185 | objOverlay.style.height = (arrayPageSize[1] + 'px');
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| 186 | objOverlay.style.display = 'block';
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| 187 |
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| 188 | // preload image
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| 189 | imgPreload = new Image();
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| 190 |
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| 191 | imgPreload.onload=function(){
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| 192 | objImage.src = objLink.href;
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| 193 |
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| 194 | // center lightbox and make sure that the top and left values are not negative
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| 195 | // and the image placed outside the viewport
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| 196 | var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - imgPreload.height) / 2);
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| 197 | var lightboxLeft = ((arrayPageSize[0] - 20 - ((imgPreload.width < 65) ? 65 : imgPreload.width)) / 2);
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| 198 |
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| 199 | objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
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| 200 | objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";
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| 201 |
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| 202 |
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| 203 | objLightboxDetails.style.width = ((imgPreload.width < 65) ? '65' : imgPreload.width) + 'px';
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| 204 |
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| 205 | if(objLink.getAttribute('title')){
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| 206 | objCaption.style.display = 'block';
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| 207 | //objCaption.style.width = imgPreload.width + 'px';
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| 208 | objCaption.innerHTML = objLink.getAttribute('title');
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| 209 | } else {
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| 210 | objCaption.style.display = 'none';
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| 211 | }
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| 212 |
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| 213 | // A small pause between the image loading and displaying is required with IE,
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| 214 | // this prevents the previous image displaying for a short burst causing flicker.
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| 215 | if (navigator.appVersion.indexOf("MSIE")!=-1){
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| 216 | pause(250);
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| 217 | }
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| 218 |
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| 219 | if (objLoadingImage) { objLoadingImage.style.display = 'none'; }
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| 220 |
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| 221 | // Hide select boxes as they will 'peek' through the image in IE
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| 222 | selects = document.getElementsByTagName("select");
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| 223 | for (i = 0; i != selects.length; i++) {
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| 224 | selects[i].style.visibility = "hidden";
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| 225 | }
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| 226 |
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| 227 |
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| 228 | objLightbox.style.display = 'block';
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| 229 |
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| 230 | // After image is loaded, update the overlay height as the new image might have
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| 231 | // increased the overall page height.
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| 232 | arrayPageSize = getPageSize();
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| 233 | objOverlay.style.height = (arrayPageSize[1] + 'px');
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| 234 |
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| 235 | // Check for 'x' keypress
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| 236 | listenKey();
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| 237 |
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| 238 | return false;
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| 239 | }
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| 240 |
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| 241 | imgPreload.src = objLink.href;
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| 242 |
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| 243 | }
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| 244 |
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| 245 |
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| 246 |
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| 247 |
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| 248 |
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| 249 | //
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| 250 | // hideLightbox()
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| 251 | //
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| 252 | function hideLightbox()
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| 253 | {
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| 254 | // get objects
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| 255 | objOverlay = document.getElementById('overlay');
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| 256 | objLightbox = document.getElementById('lightbox');
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| 257 |
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| 258 | // hide lightbox and overlay
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| 259 | objOverlay.style.display = 'none';
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| 260 | objLightbox.style.display = 'none';
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| 261 |
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| 262 | // make select boxes visible
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| 263 | selects = document.getElementsByTagName("select");
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| 264 | for (i = 0; i != selects.length; i++) {
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| 265 | selects[i].style.visibility = "visible";
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| 266 | }
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| 267 |
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| 268 | // disable keypress listener
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| 269 | document.onkeypress = '';
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| 270 | }
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| 271 |
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| 272 |
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| 273 |
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| 274 |
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| 275 | //
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| 276 | // initLightbox()
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| 277 | // Function runs on window load, going through link tags looking for rel="lightbox".
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| 278 | // These links receive onclick events that enable the lightbox display for their targets.
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| 279 | // The function also inserts html markup at the top of the page which will be used as a
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| 280 | // container for the overlay pattern and the inline image.
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| 281 | //
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| 282 | function initLightbox()
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| 283 | {
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| 284 |
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| 285 | if (!document.getElementsByTagName){ return; }
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| 286 | var anchors = document.getElementsByTagName("a");
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| 287 |
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| 288 | // loop through all anchor tags
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| 289 | for (var i=0; i<anchors.length; i++){
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| 290 | var anchor = anchors[i];
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| 291 |
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| 292 | if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "lightbox")){
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| 293 | anchor.onclick = function () {showLightbox(this); return false;}
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| 294 | }
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| 295 | }
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| 296 |
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| 297 | // the rest of this code inserts html at the top of the page that looks like this:
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| 298 | //
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| 299 | // <div id="overlay">
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| 300 | // <a href="#" onclick="hideLightbox(); return false;"><img id="loadingImage" /></a>
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| 301 | // </div>
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| 302 | // <div id="lightbox">
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| 303 | // <a href="#" onclick="hideLightbox(); return false;" title="Click anywhere to close image">
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| 304 | // <img id="closeButton" />
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| 305 | // <img id="lightboxImage" />
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| 306 | // </a>
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| 307 | // <div id="lightboxDetails">
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| 308 | // <div id="lightboxCaption"></div>
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| 309 | // <div id="keyboardMsg"></div>
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| 310 | // </div>
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| 311 | // </div>
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| 312 |
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| 313 | var objBody = document.getElementsByTagName("body").item(0);
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| 314 |
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| 315 | // create overlay div and hardcode some functional styles (aesthetic styles are in CSS file)
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| 316 | var objOverlay = document.createElement("div");
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| 317 | objOverlay.setAttribute('id','overlay');
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| 318 | objOverlay.onclick = function () {hideLightbox(); return false;}
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| 319 | objOverlay.style.display = 'none';
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| 320 | objOverlay.style.position = 'absolute';
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| 321 | objOverlay.style.top = '0';
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| 322 | objOverlay.style.left = '0';
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| 323 | objOverlay.style.zIndex = '90';
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| 324 | objOverlay.style.width = '100%';
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| 325 | objBody.insertBefore(objOverlay, objBody.firstChild);
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| 326 |
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| 327 | var arrayPageSize = getPageSize();
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| 328 | var arrayPageScroll = getPageScroll();
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| 329 |
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| 330 | // preload and create loader image
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| 331 | var imgPreloader = new Image();
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| 332 |
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| 333 | // if loader image found, create link to hide lightbox and create loadingimage
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| 334 | imgPreloader.onload=function(){
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| 335 |
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| 336 | var objLoadingImageLink = document.createElement("a");
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| 337 | objLoadingImageLink.setAttribute('href','#');
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| 338 | objLoadingImageLink.onclick = function () {hideLightbox(); return false;}
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| 339 | objOverlay.appendChild(objLoadingImageLink);
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| 340 |
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| 341 | var objLoadingImage = document.createElement("img");
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| 342 | objLoadingImage.src = loadingImage;
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| 343 | objLoadingImage.setAttribute('id','loadingImage');
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| 344 | objLoadingImage.style.position = 'absolute';
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| 345 | objLoadingImage.style.zIndex = '150';
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| 346 | objLoadingImageLink.appendChild(objLoadingImage);
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| 347 |
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| 348 | imgPreloader.onload=function(){}; // clear onLoad, as IE will flip out w/animated gifs
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| 349 |
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| 350 | return false;
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| 351 | }
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| 352 |
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| 353 | imgPreloader.src = loadingImage;
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| 354 |
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| 355 | // create lightbox div, same note about styles as above
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| 356 | var objLightbox = document.createElement("div");
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| 357 | objLightbox.setAttribute('id','lightbox');
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| 358 | objLightbox.style.display = 'none';
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| 359 | objLightbox.style.position = 'absolute';
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| 360 | objLightbox.style.zIndex = '100';
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| 361 | objBody.insertBefore(objLightbox, objOverlay.nextSibling);
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| 362 |
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| 363 | // create link
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| 364 | var objLink = document.createElement("a");
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| 365 | objLink.setAttribute('href','#');
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| 366 | objLink.setAttribute('title','Clique para fechar');
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| 367 | objLink.onclick = function () {hideLightbox(); return false;}
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| 368 | objLightbox.appendChild(objLink);
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| 369 |
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| 370 | // preload and create close button image
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| 371 | var imgPreloadCloseButton = new Image();
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| 372 |
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| 373 | // if close button image found,
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| 374 | imgPreloadCloseButton.onload=function(){
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| 375 |
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| 376 | var objCloseButton = document.createElement("img");
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| 377 | objCloseButton.src = closeButton;
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| 378 | objCloseButton.setAttribute('id','closeButton');
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| 379 | objCloseButton.style.position = 'absolute';
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| 380 | objCloseButton.style.zIndex = '200';
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| 381 | objLink.appendChild(objCloseButton);
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| 382 |
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| 383 | return false;
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| 384 | }
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| 385 |
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| 386 | imgPreloadCloseButton.src = closeButton;
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| 387 |
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| 388 | // create image
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| 389 | var objImage = document.createElement("img");
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| 390 | objImage.setAttribute('id','lightboxImage');
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| 391 | objLink.appendChild(objImage);
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| 392 |
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| 393 | // create details div, a container for the caption and keyboard message
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| 394 | var objLightboxDetails = document.createElement("div");
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| 395 | objLightboxDetails.setAttribute('id','lightboxDetails');
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| 396 | objLightbox.appendChild(objLightboxDetails);
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| 397 |
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| 398 | // create caption
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| 399 | var objCaption = document.createElement("div");
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| 400 | objCaption.setAttribute('id','lightboxCaption');
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| 401 | objCaption.style.display = 'none';
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| 402 | objLightboxDetails.appendChild(objCaption);
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| 403 |
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| 404 | // create keyboard message
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| 405 | var objKeyboardMsg = document.createElement("div");
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| 406 | objKeyboardMsg.setAttribute('id','keyboardMsg');
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| 407 | objKeyboardMsg.innerHTML = 'pressione <a href="#" onclick="hideLightbox(); return false;"><kbd>x</kbd></a> para fechar';
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| 408 | objLightboxDetails.appendChild(objKeyboardMsg);
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| 409 |
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| 410 |
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| 411 | }
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| 412 |
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| 413 |
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| 414 |
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| 415 |
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| 416 | //
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| 417 | // addLoadEvent()
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| 418 | // Adds event to window.onload without overwriting currently assigned onload functions.
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| 419 | // Function found at Simon Willison's weblog - http://simon.incutio.com/
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| 420 | //
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| 421 | function addLoadEvent(func)
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| 422 | {
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| 423 | var oldonload = window.onload;
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| 424 | if (typeof window.onload != 'function'){
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| 425 | window.onload = func;
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| 426 | } else {
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| 427 | window.onload = function(){
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| 428 | oldonload();
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| 429 | func();
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| 430 | }
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| 431 | }
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| 432 |
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| 433 | }
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| 434 |
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| 435 |
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| 436 |
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| 437 | addLoadEvent(initLightbox); // run initLightbox onLoad
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