/*! Respond.js: min/max-width media query polyfill. Remote proxy (c) Scott Jehl. MIT/GPLv2 Lic. j.mp/respondjs */
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(function(win, doc, undefined){
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var docElem = doc.documentElement,
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proxyURL = doc.getElementById("respond-proxy").href,
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redirectURL = (doc.getElementById("respond-redirect") || location).href,
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baseElem = doc.getElementsByTagName("base")[0],
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urls = [],
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refNode;
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function encode(url){
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return win.encodeURIComponent(url);
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}
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function fakejax( url, callback ){
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var iframe,
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AXO;
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// All hail Google http://j.mp/iKMI19
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// Behold, an iframe proxy without annoying clicky noises.
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if ( "ActiveXObject" in win ) {
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AXO = new ActiveXObject( "htmlfile" );
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AXO.open();
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AXO.write( '<iframe id="x"></iframe>' );
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AXO.close();
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iframe = AXO.getElementById( "x" );
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} else {
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iframe = doc.createElement( "iframe" );
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iframe.style.cssText = "position:absolute;top:-99em";
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docElem.insertBefore(iframe, docElem.firstElementChild || docElem.firstChild );
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}
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iframe.src = checkBaseURL(proxyURL) + "?url=" + encode(redirectURL) + "&css=" + encode(checkBaseURL(url));
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function checkFrameName() {
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var cssText;
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try {
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cssText = iframe.contentWindow.name;
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}
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catch (e) { }
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if (cssText) {
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// We've got what we need. Stop the iframe from loading further content.
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iframe.src = "about:blank";
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iframe.parentNode.removeChild(iframe);
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iframe = null;
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// Per http://j.mp/kn9EPh, not taking any chances. Flushing the ActiveXObject
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if (AXO) {
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AXO = null;
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if (win.CollectGarbage) {
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win.CollectGarbage();
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}
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}
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callback(cssText);
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}
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else{
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win.setTimeout(checkFrameName, 100);
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}
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}
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win.setTimeout(checkFrameName, 500);
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}
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function checkBaseURL(href) {
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if (baseElem && href.indexOf(baseElem.href) === -1) {
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bref = (/\/$/).test(baseElem.href) ? baseElem.href : (baseElem.href + "/");
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href = bref + href;
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}
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return href;
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}
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function checkRedirectURL() {
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// IE6 & IE7 don't build out absolute urls in <link /> attributes.
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// So respond.proxy.gif remains relative instead of http://example.com/respond.proxy.gif.
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// This trickery resolves that issue.
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if (~ !redirectURL.indexOf(location.host)) {
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var fakeLink = doc.createElement("div");
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fakeLink.innerHTML = '<a href="' + redirectURL + '"></a>';
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docElem.insertBefore(fakeLink, docElem.firstElementChild || docElem.firstChild );
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// Grab the parsed URL from that dummy object
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redirectURL = fakeLink.firstChild.href;
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// Clean up
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fakeLink.parentNode.removeChild(fakeLink);
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fakeLink = null;
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}
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}
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function buildUrls(){
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var links = doc.getElementsByTagName( "link" );
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for( var i = 0, linkl = links.length; i < linkl; i++ ){
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var thislink = links[i],
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href = links[i].href,
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extreg = (/^([a-zA-Z:]*\/\/(www\.)?)/).test( href ),
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ext = (baseElem && !extreg) || extreg;
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//make sure it's an external stylesheet
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if( thislink.rel.indexOf( "stylesheet" ) >= 0 && ext ){
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(function( link ){
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fakejax( href, function( css ){
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link.styleSheet.rawCssText = css;
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respond.update();
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} );
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})( thislink );
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}
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}
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}
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if( !respond.mediaQueriesSupported ){
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checkRedirectURL();
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buildUrls();
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}
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})( window, document );
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