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-
-
-
- window.matchMedia = window.matchMedia || (function(doc, undefined){
-
- var bool,
- docElem = doc.documentElement,
- refNode = docElem.firstElementChild || docElem.firstChild,
-
- fakeBody = doc.createElement('body'),
- div = doc.createElement('div');
-
- div.id = 'mq-test-1';
- div.style.cssText = "position:absolute;top:-100em";
- fakeBody.style.background = "none";
- fakeBody.appendChild(div);
-
- return function(q){
-
- div.innerHTML = '­<style media="'+q+'"> #mq-test-1 { width: 42px; }</style>';
-
- docElem.insertBefore(fakeBody, refNode);
- bool = div.offsetWidth == 42;
- docElem.removeChild(fakeBody);
-
- return { matches: bool, media: q };
- };
-
- })(document);
-
-
-
-
-
- (function( win ){
-
- win.respond = {};
-
-
- respond.update = function(){};
-
-
- respond.mediaQueriesSupported = win.matchMedia && win.matchMedia( "only all" ).matches;
-
-
- if( respond.mediaQueriesSupported ){ return; }
-
-
- var doc = win.document,
- docElem = doc.documentElement,
- mediastyles = [],
- rules = [],
- appendedEls = [],
- parsedSheets = {},
- resizeThrottle = 30,
- head = doc.getElementsByTagName( "head" )[0] || docElem,
- base = doc.getElementsByTagName( "base" )[0],
- links = head.getElementsByTagName( "link" ),
- requestQueue = [],
-
-
- ripCSS = function(){
- var sheets = links,
- sl = sheets.length,
- i = 0,
-
- sheet, href, media, isCSS;
-
- for( ; i < sl; i++ ){
- sheet = sheets[ i ],
- href = sheet.href,
- media = sheet.media,
- isCSS = sheet.rel && sheet.rel.toLowerCase() === "stylesheet";
-
-
- if( !!href && isCSS && !parsedSheets[ href ] ){
-
- if (sheet.styleSheet && sheet.styleSheet.rawCssText) {
- translate( sheet.styleSheet.rawCssText, href, media );
- parsedSheets[ href ] = true;
- } else {
- if( (!/^([a-zA-Z:]*\/\/)/.test( href ) && !base)
- || href.replace( RegExp.$1, "" ).split( "/" )[0] === win.location.host ){
- requestQueue.push( {
- href: href,
- media: media
- } );
- }
- }
- }
- }
- makeRequests();
- },
-
-
- makeRequests = function(){
- if( requestQueue.length ){
- var thisRequest = requestQueue.shift();
-
- ajax( thisRequest.href, function( styles ){
- translate( styles, thisRequest.href, thisRequest.media );
- parsedSheets[ thisRequest.href ] = true;
- makeRequests();
- } );
- }
- },
-
-
- translate = function( styles, href, media ){
- var qs = styles.match( /@media[^\{]+\{([^\{\}]*\{[^\}\{]*\})+/gi ),
- ql = qs && qs.length || 0,
-
- href = href.substring( 0, href.lastIndexOf( "/" )),
- repUrls = function( css ){
- return css.replace( /(url\()['"]?([^\/\)'"][^:\)'"]+)['"]?(\))/g, "$1" + href + "$2$3" );
- },
- useMedia = !ql && media,
-
- i = 0,
- j, fullq, thisq, eachq, eql;
-
-
- if( href.length ){ href += "/"; }
-
-
-
-
-
- if( useMedia ){
- ql = 1;
- }
-
-
- for( ; i < ql; i++ ){
- j = 0;
-
-
- if( useMedia ){
- fullq = media;
- rules.push( repUrls( styles ) );
- }
-
- else{
- fullq = qs[ i ].match( /@media *([^\{]+)\{([\S\s]+?)$/ ) && RegExp.$1;
- rules.push( RegExp.$2 && repUrls( RegExp.$2 ) );
- }
-
- eachq = fullq.split( "," );
- eql = eachq.length;
-
- for( ; j < eql; j++ ){
- thisq = eachq[ j ];
- mediastyles.push( {
- media : thisq.split( "(" )[ 0 ].match( /(only\s+)?([a-zA-Z]+)\s?/ ) && RegExp.$2 || "all",
- rules : rules.length - 1,
- hasquery: thisq.indexOf("(") > -1,
- minw : thisq.match( /\(min\-width:[\s]*([\s]*[0-9\.]+)(px|em)[\s]*\)/ ) && parseFloat( RegExp.$1 ) + ( RegExp.$2 || "" ),
- maxw : thisq.match( /\(max\-width:[\s]*([\s]*[0-9\.]+)(px|em)[\s]*\)/ ) && parseFloat( RegExp.$1 ) + ( RegExp.$2 || "" )
- } );
- }
- }
-
- applyMedia();
- },
-
- lastCall,
-
- resizeDefer,
-
-
- getEmValue = function() {
- var ret,
- div = doc.createElement('div'),
- body = doc.body,
- fakeUsed = false;
-
- div.style.cssText = "position:absolute;font-size:1em;width:1em";
-
- if( !body ){
- body = fakeUsed = doc.createElement( "body" );
- body.style.background = "none";
- }
-
- body.appendChild( div );
-
- docElem.insertBefore( body, docElem.firstChild );
-
- ret = div.offsetWidth;
-
- if( fakeUsed ){
- docElem.removeChild( body );
- }
- else {
- body.removeChild( div );
- }
-
-
- ret = eminpx = parseFloat(ret);
-
- return ret;
- },
-
-
- eminpx,
-
-
- applyMedia = function( fromResize ){
- var name = "clientWidth",
- docElemProp = docElem[ name ],
- currWidth = doc.compatMode === "CSS1Compat" && docElemProp || doc.body[ name ] || docElemProp,
- styleBlocks = {},
- lastLink = links[ links.length-1 ],
- now = (new Date()).getTime();
-
-
- if( fromResize && lastCall && now - lastCall < resizeThrottle ){
- clearTimeout( resizeDefer );
- resizeDefer = setTimeout( applyMedia, resizeThrottle );
- return;
- }
- else {
- lastCall = now;
- }
-
- for( var i in mediastyles ){
- var thisstyle = mediastyles[ i ],
- min = thisstyle.minw,
- max = thisstyle.maxw,
- minnull = min === null,
- maxnull = max === null,
- em = "em";
-
- if( !!min ){
- min = parseFloat( min ) * ( min.indexOf( em ) > -1 ? ( eminpx || getEmValue() ) : 1 );
- }
- if( !!max ){
- max = parseFloat( max ) * ( max.indexOf( em ) > -1 ? ( eminpx || getEmValue() ) : 1 );
- }
-
-
- if( !thisstyle.hasquery || ( !minnull || !maxnull ) && ( minnull || currWidth >= min ) && ( maxnull || currWidth <= max ) ){
- if( !styleBlocks[ thisstyle.media ] ){
- styleBlocks[ thisstyle.media ] = [];
- }
- styleBlocks[ thisstyle.media ].push( rules[ thisstyle.rules ] );
- }
- }
-
-
- for( var i in appendedEls ){
- if( appendedEls[ i ] && appendedEls[ i ].parentNode === head ){
- head.removeChild( appendedEls[ i ] );
- }
- }
-
-
- for( var i in styleBlocks ){
- var ss = doc.createElement( "style" ),
- css = styleBlocks[ i ].join( "\n" );
-
- ss.type = "text/css";
- ss.media = i;
-
-
-
- head.insertBefore( ss, lastLink.nextSibling );
-
- if ( ss.styleSheet ){
- ss.styleSheet.cssText = css;
- }
- else {
- ss.appendChild( doc.createTextNode( css ) );
- }
-
-
- appendedEls.push( ss );
- }
- },
-
- ajax = function( url, callback ) {
- var req = xmlHttp();
- if (!req){
- return;
- }
- req.open( "GET", url, true );
- req.onreadystatechange = function () {
- if ( req.readyState != 4 || req.status != 200 && req.status != 304 ){
- return;
- }
- callback( req.responseText );
- }
- if ( req.readyState == 4 ){
- return;
- }
- req.send( null );
- },
-
- xmlHttp = (function() {
- var xmlhttpmethod = false;
- try {
- xmlhttpmethod = new XMLHttpRequest();
- }
- catch( e ){
- xmlhttpmethod = new ActiveXObject( "Microsoft.XMLHTTP" );
- }
- return function(){
- return xmlhttpmethod;
- };
- })();
-
-
- ripCSS();
-
-
- respond.update = ripCSS;
-
-
- function callMedia(){
- applyMedia( true );
- }
- if( win.addEventListener ){
- win.addEventListener( "resize", callMedia, false );
- }
- else if( win.attachEvent ){
- win.attachEvent( "onresize", callMedia );
- }
- })(this);
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