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Diffstat (limited to 'source/javascripts/libs/ie/respond.js')
| -rw-r--r-- | source/javascripts/libs/ie/respond.js | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/source/javascripts/libs/ie/respond.js b/source/javascripts/libs/ie/respond.js new file mode 100644 index 00000000..e7a5bba3 --- /dev/null +++ b/source/javascripts/libs/ie/respond.js @@ -0,0 +1,292 @@ +/* + * respond.js - A small and fast polyfill for min/max-width CSS3 Media Queries + * Copyright 2011, Scott Jehl, scottjehl.com + * Dual licensed under the MIT or GPL Version 2 licenses. + * Usage: Check out the readme file or github.com/scottjehl/respond +*/ +(function( win, mqSupported ){ + //exposed namespace + win.respond = {}; + + //define update even in native-mq-supporting browsers, to avoid errors + respond.update = function(){}; + + //expose media query support flag for external use + respond.mediaQueriesSupported = mqSupported; + + //if media queries are supported, exit here + if( mqSupported ){ return; } + + //define vars + var doc = win.document, + docElem = doc.documentElement, + mediastyles = [], + rules = [], + appendedEls = [], + parsedSheets = {}, + resizeThrottle = 30, + head = doc.getElementsByTagName( "head" )[0] || docElem, + links = head.getElementsByTagName( "link" ), + requestQueue = [], + + //loop stylesheets, send text content to translate + ripCSS = function(){ + var sheets = links, + sl = sheets.length, + i = 0, + //vars for loop: + sheet, href, media, isCSS; + + for( ; i < sl; i++ ){ + sheet = sheets[ i ], + href = sheet.href, + media = sheet.media, + isCSS = sheet.rel && sheet.rel.toLowerCase() === "stylesheet"; + + //only links plz and prevent re-parsing + if( !!href && isCSS && !parsedSheets[ href ] ){ + if( !/^([a-zA-Z]+?:(\/\/)?(www\.)?)/.test( href ) + || href.replace( RegExp.$1, "" ).split( "/" )[0] === win.location.host ){ + requestQueue.push( { + href: href, + media: media + } ); + } + else{ + parsedSheets[ href ] = true; + } + } + } + makeRequests(); + + }, + + //recurse through request queue, get css text + 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(); + } ); + } + }, + + //find media blocks in css text, convert to style blocks + translate = function( styles, href, media ){ + var qs = styles.match( /@media ([^\{]+)\{((?!@media)[\s\S])*(?=\}[\s]*\/\*\/mediaquery\*\/)/gmi ), + ql = qs && qs.length || 0, + //try to get CSS path + href = href.substring( 0, href.lastIndexOf( "/" )), + repUrls = function( css ){ + return css.replace( /(url\()['"]?([^\/\)'"][^:\)'"]+)['"]?(\))/g, "$1" + href + "$2$3" ); + }, + useMedia = !ql && media, + //vars used in loop + i = 0, + j, fullq, thisq, eachq, eql; + + //if path exists, tack on trailing slash + if( href.length ){ href += "/"; } + + //if no internal queries exist, but media attr does, use that + //note: this currently lacks support for situations where a media attr is specified on a link AND + //its associated stylesheet has internal CSS media queries. + //In those cases, the media attribute will currently be ignored. + if( useMedia ){ + ql = 1; + } + + + for( ; i < ql; i++ ){ + j = 0; + + //media attr + if( useMedia ){ + fullq = media; + rules.push( repUrls( styles ) ); + } + //parse for styles + else{ + fullq = qs[ i ].match( /@media ([^\{]+)\{([\S\s]+?)$/ ) && 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.match( /(only\s+)?([a-zA-Z]+)(\sand)?/ ) && RegExp.$2, + rules : rules.length - 1, + minw : thisq.match( /\(min\-width:[\s]*([\s]*[0-9]+)px[\s]*\)/ ) && parseFloat( RegExp.$1 ), + maxw : thisq.match( /\(max\-width:[\s]*([\s]*[0-9]+)px[\s]*\)/ ) && parseFloat( RegExp.$1 ) + } ); + } + } + + applyMedia(); + }, + + lastCall, + + resizeDefer, + + //enable/disable styles + applyMedia = function( fromResize ){ + var name = "clientWidth", + docElemProp = docElem[ name ], + currWidth = doc.compatMode === "CSS1Compat" && docElemProp || doc.body[ name ] || docElemProp, + styleBlocks = {}, + dFrag = doc.createDocumentFragment(), + lastLink = links[ links.length-1 ], + now = (new Date()).getTime(); + + //throttle resize calls + 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 ]; + if( !thisstyle.minw && !thisstyle.maxw || + ( !thisstyle.minw || thisstyle.minw && currWidth >= thisstyle.minw ) && + (!thisstyle.maxw || thisstyle.maxw && currWidth <= thisstyle.maxw ) ){ + if( !styleBlocks[ thisstyle.media ] ){ + styleBlocks[ thisstyle.media ] = []; + } + styleBlocks[ thisstyle.media ].push( rules[ thisstyle.rules ] ); + } + } + + //remove any existing respond style element(s) + for( var i in appendedEls ){ + if( appendedEls[ i ] && appendedEls[ i ].parentNode === head ){ + head.removeChild( appendedEls[ i ] ); + } + } + + //inject active styles, grouped by media type + for( var i in styleBlocks ){ + var ss = doc.createElement( "style" ), + css = styleBlocks[ i ].join( "\n" ); + + ss.type = "text/css"; + ss.media = i; + + if ( ss.styleSheet ){ + ss.styleSheet.cssText = css; + } + else { + ss.appendChild( doc.createTextNode( css ) ); + } + dFrag.appendChild( ss ); + appendedEls.push( ss ); + } + + //append to DOM at once + head.insertBefore( dFrag, lastLink.nextSibling ); + }, + //tweaked Ajax functions from Quirksmode + 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(); + }, + //define ajax obj + xmlHttp = (function() { + var xmlhttpmethod = false, + attempts = [ + function(){ return new ActiveXObject("Microsoft.XMLHTTP") }, + function(){ return new XMLHttpRequest() } + ], + al = attempts.length; + + while( al-- ){ + try { + xmlhttpmethod = attempts[ al ](); + } + catch(e) { + continue; + } + break; + } + return function(){ + return xmlhttpmethod; + }; + })(); + + //translate CSS + ripCSS(); + + //expose update for re-running respond later on + respond.update = ripCSS; + + //adjust on resize + function callMedia(){ + applyMedia( true ); + } + if( win.addEventListener ){ + win.addEventListener( "resize", callMedia, false ); + } + else if( win.attachEvent ){ + win.attachEvent( "onresize", callMedia ); + } +})( + this, + (function( win ){ + + //for speed, flag browsers with window.matchMedia support and IE 9 as supported + if( win.matchMedia ){ return true; } + + var bool, + doc = document, + docElem = doc.documentElement, + refNode = docElem.firstElementChild || docElem.firstChild, + // fakeBody required for <FF4 when executed in <head> + fakeUsed = !doc.body, + fakeBody = doc.body || doc.createElement( "body" ), + div = doc.createElement( "div" ), + q = "only all"; + + div.id = "mq-test-1"; + div.style.cssText = "position:absolute;top:-99em"; + fakeBody.appendChild( div ); + + div.innerHTML = '_<style media="'+q+'"> #mq-test-1 { width: 9px; }</style>'; + if( fakeUsed ){ + docElem.insertBefore( fakeBody, refNode ); + } + div.removeChild( div.firstChild ); + bool = div.offsetWidth == 9; + if( fakeUsed ){ + docElem.removeChild( fakeBody ); + } + else{ + fakeBody.removeChild( div ); + } + return bool; + })( this ) +); + |