/* link-preview v1.4 by frequency-decoder.com Released under a creative commons Attribution-ShareAlike 2.5 license (http://creativecommons.org/licenses/by-sa/2.5/) Please credit frequency-decoder in any derivative work - thanks. You are free: * to copy, distribute, display, and perform the work * to make derivative works * to make commercial use of the work Under the following conditions: by Attribution. -------------- You must attribute the work in the manner specified by the author or licensor. sa -- Share Alike. If you alter, transform, or build upon this work, you may distribute the resulting work only under a license identical to this one. * For any reuse or distribution, you must make clear to others the license terms of this work. * Any of these conditions can be waived if you get permission from the copyright holder. References: Wesnapr: http://www.websnapr.com Dustan Diaz: http://www.dustindiaz.com/sweet-titles-finalized Arc90: http://lab.arc90.com/2006/07/link_thumbnail.php */ var webSnapr = { x:0, y:0, obj:{}, img:null, lnk:null, timer:null, opacityTimer:null, errorTimer:null, hidden:true, linkPool: {}, baseURI: "./linkview", imageCache: [], init: function() { var lnks = document.getElementsByTagName('a'); var i = lnks.length || 0; var cnt = 0; while(i--) { if(lnks[i].className && lnks[i].className.search(/websnapr/) != -1) { webSnapr.addEvent(lnks[i], ["focus", "mouseover"], webSnapr.initThumb); webSnapr.addEvent(lnks[i], ["blur", "mouseout"], webSnapr.hideThumb); webSnapr.linkPool[lnks[i].href] = cnt++; } } if(cnt) { webSnapr.preloadImages(); webSnapr.obj = document.createElement('div'); webSnapr.ind = document.createElement('div'); webSnapr.ind.className= "imageLoaded"; webSnapr.img = document.createElement('img'); webSnapr.img.alt = "preview"; webSnapr.img.id = "fdImage"; webSnapr.addEvent(webSnapr.img, ["load"], webSnapr.imageLoaded); webSnapr.addEvent(webSnapr.img, ["error"], webSnapr.imageError); webSnapr.obj.id = "fdImageThumb"; webSnapr.obj.style.visibility = "hidden"; webSnapr.obj.style.top = "0"; webSnapr.obj.style.left = "0"; webSnapr.addEvent(webSnapr.img, ["mouseout"], webSnapr.hideThumb); webSnapr.obj.appendChild(webSnapr.ind); webSnapr.obj.appendChild(webSnapr.img); webSnapr.addEvent(webSnapr.obj, ["mouseout"], webSnapr.hideThumb); document.getElementsByTagName('body')[0].appendChild(webSnapr.obj); } }, preloadImages: function() { var imgList = ["lt.png", "lb.png", "rt.png", "rb.png", "error.gif", "loading.gif"]; var imgObj = document.createElement('img'); for(var i = 0, img; img = imgList[i]; i++) { webSnapr.imageCache[i] = imgObj.cloneNode(false); webSnapr.imageCache[i].src = webSnapr.baseURI + img; } }, imageLoaded: function() { if(webSnapr.errorTimer) clearTimeout(webSnapr.errorTimer); if(!webSnapr.hidden) webSnapr.img.style.visibility = "visible"; webSnapr.ind.className= "imageLoaded"; webSnapr.ind.style.visibility = "hidden"; }, imageError: function(e) { if(webSnapr.errorTimer) clearTimeout(webSnapr.errorTimer); webSnapr.ind.className= "imageError"; webSnapr.errorTimer = window.setTimeout("webSnapr.hideThumb()",2000); }, initThumb: function(e) { e = e || event; webSnapr.lnk = this; var positionClass = "left"; var heightIndent; var indentX = 0; var indentY = 0; var trueBody = (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body; if(String(e.type).toLowerCase().search(/mouseover/) != -1) { if (document.captureEvents) { webSnapr.x = e.pageX; webSnapr.y = e.pageY; } else if ( window.event.clientX ) { webSnapr.x = window.event.clientX+trueBody.scrollLeft; webSnapr.y = window.event.clientY+trueBody.scrollTop; } indentX = 10; heightIndent = parseInt(webSnapr.y-(webSnapr.obj.offsetHeight))+'px'; } else { var obj = this; var curleft = curtop = 0; if (obj.offsetParent) { curleft = obj.offsetLeft; curtop = obj.offsetTop; while (obj = obj.offsetParent) { curleft += obj.offsetLeft; curtop += obj.offsetTop; } } curtop += this.offsetHeight; webSnapr.x = curleft; webSnapr.y = curtop; heightIndent = parseInt(webSnapr.y-(webSnapr.obj.offsetHeight)-this.offsetHeight)+'px'; } if ( parseInt(trueBody.clientWidth+trueBody.scrollLeft) < parseInt(webSnapr.obj.offsetWidth+webSnapr.x) + indentX) { webSnapr.obj.style.left = parseInt(webSnapr.x-(webSnapr.obj.offsetWidth+indentX))+'px'; positionClass = "right"; } else { webSnapr.obj.style.left = (webSnapr.x+indentX)+'px'; } if ( parseInt(trueBody.clientHeight+trueBody.scrollTop) < parseInt(webSnapr.obj.offsetHeight+webSnapr.y) + indentY ) { webSnapr.obj.style.top = heightIndent; positionClass += "Top"; } else { webSnapr.obj.style.top = (webSnapr.y + indentY)+'px'; positionClass += "Bottom"; } webSnapr.obj.className = positionClass; webSnapr.timer = window.setTimeout("webSnapr.showThumb()",500); }, showThumb: function(e) { webSnapr.hidden = false; webSnapr.obj.style.visibility = webSnapr.ind.style.visibility = 'visible'; webSnapr.obj.style.opacity = webSnapr.ind.style.opacity = '0'; webSnapr.img.style.visibility = "hidden"; var addy = String(webSnapr.lnk.href); webSnapr.errorTimer = window.setTimeout("webSnapr.imageError()",15000); webSnapr.img.src = 'http://images.websnapr.com/?url='+ encodeURIComponent(addy)+'&rndm='+parseInt(webSnapr.linkPool[webSnapr.lnk.href]); /*@cc_on@*/ /*@if(@_win32) return; /*@end@*/ webSnapr.fade(10); }, hideThumb: function(e) { // Don't mouseout if over the bubble e = e || window.event; // Check if mouse(over|out) are still within the same parent element if(e.type == "mouseout") { var elem = e.relatedTarget || e.toElement; if(elem.id && elem.id.search("fdImage") != -1) return false; } webSnapr.hidden = true; if(webSnapr.timer) clearTimeout(webSnapr.timer); if(webSnapr.errorTimer) clearTimeout(webSnapr.errorTimer); if(webSnapr.opacityTimer) clearTimeout(webSnapr.opacityTimer); webSnapr.obj.style.visibility = 'hidden'; webSnapr.ind.style.visibility = 'hidden'; webSnapr.img.style.visibility = 'hidden'; webSnapr.ind.className= "imageLoaded"; }, fade: function(opac) { var passed = parseInt(opac); var newOpac = parseInt(passed+10); if ( newOpac < 90 ) { webSnapr.obj.style.opacity = webSnapr.ind.style.opacity = '.'+newOpac; webSnapr.opacityTimer = window.setTimeout("webSnapr.fade('"+newOpac+"')",20); } else { webSnapr.obj.style.opacity = webSnapr.ind.style.opacity = '1'; } }, addEvent: function( obj, types, fn ) { var type; for(var i = 0; i < types.length; i++) { type = types[i]; if ( obj.attachEvent ) { obj['e'+type+fn] = fn; obj[type+fn] = function(){obj['e'+type+fn]( window.event );} obj.attachEvent( 'on'+type, obj[type+fn] ); } else obj.addEventListener( type, fn, false ); } } } webSnapr.addEvent(window, ['load'], webSnapr.init);