markus / MarkusLogview / MARKUS_LOGVIEW / Scripts / respond.js @ 84578b97
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| 1 | 84578b97 | djkim | /* NUGET: BEGIN LICENSE TEXT
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| 2 | *
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| 3 | * Microsoft grants you the right to use these script files for the sole
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| 4 | * purpose of either: (i) interacting through your browser with the Microsoft
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| 5 | * website or online service, subject to the applicable licensing or use
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| 6 | * terms; or (ii) using the files as included with a Microsoft product subject
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| 7 | * to that product's license terms. Microsoft reserves all other rights to the
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| 8 | * files not expressly granted by Microsoft, whether by implication, estoppel
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| 9 | * or otherwise. Insofar as a script file is dual licensed under GPL,
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| 10 | * Microsoft neither took the code under GPL nor distributes it thereunder but
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| 11 | * under the terms set out in this paragraph. All notices and licenses
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| 12 | * below are for informational purposes only.
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| 13 | *
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| 14 | * NUGET: END LICENSE TEXT */
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| 15 | /*! matchMedia() polyfill - Test a CSS media type/query in JS. Authors & copyright (c) 2012: Scott Jehl, Paul Irish, Nicholas Zakas. Dual MIT/BSD license */
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| 16 | /*! NOTE: If you're already including a window.matchMedia polyfill via Modernizr or otherwise, you don't need this part */
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| 17 | window.matchMedia = window.matchMedia || (function(doc, undefined){ |
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| 18 | |||
| 19 | var bool,
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| 20 | docElem = doc.documentElement, |
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| 21 | refNode = docElem.firstElementChild || docElem.firstChild, |
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| 22 | // fakeBody required for <FF4 when executed in <head>
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| 23 | fakeBody = doc.createElement('body'),
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| 24 | div = doc.createElement('div');
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| 25 | |||
| 26 | div.id = 'mq-test-1';
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| 27 | div.style.cssText = "position:absolute;top:-100em";
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| 28 | fakeBody.style.background = "none";
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| 29 | fakeBody.appendChild(div); |
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| 30 | |||
| 31 | return function(q){ |
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| 32 | |||
| 33 | div.innerHTML = '­<style media="'+q+'"> #mq-test-1 { width: 42px; }</style>'; |
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| 34 | |||
| 35 | docElem.insertBefore(fakeBody, refNode); |
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| 36 | bool = div.offsetWidth == 42;
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| 37 | docElem.removeChild(fakeBody); |
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| 38 | |||
| 39 | return { matches: bool, media: q }; |
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| 40 | }; |
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| 41 | |||
| 42 | })(document); |
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| 43 | |||
| 44 | |||
| 45 | |||
| 46 | |||
| 47 | /*! Respond.js v1.2.0: min/max-width media query polyfill. (c) Scott Jehl. MIT/GPLv2 Lic. j.mp/respondjs */
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| 48 | (function( win ){
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| 49 | //exposed namespace
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| 50 | win.respond = {};
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| 51 | |||
| 52 | //define update even in native-mq-supporting browsers, to avoid errors
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| 53 | respond.update = function(){}; |
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| 54 | |||
| 55 | //expose media query support flag for external use
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| 56 | respond.mediaQueriesSupported = win.matchMedia && win.matchMedia( "only all" ).matches;
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| 57 | |||
| 58 | //if media queries are supported, exit here
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| 59 | if( respond.mediaQueriesSupported ){ return; } |
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| 60 | |||
| 61 | //define vars
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| 62 | var doc = win.document,
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| 63 | docElem = doc.documentElement, |
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| 64 | mediastyles = [], |
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| 65 | rules = [], |
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| 66 | appendedEls = [], |
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| 67 | parsedSheets = {},
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| 68 | resizeThrottle = 30,
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| 69 | head = doc.getElementsByTagName( "head" )[0] || docElem, |
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| 70 | base = doc.getElementsByTagName( "base" )[0], |
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| 71 | links = head.getElementsByTagName( "link" ),
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| 72 | requestQueue = [], |
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| 73 | |||
| 74 | //loop stylesheets, send text content to translate
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| 75 | ripCSS = function(){ |
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| 76 | var sheets = links,
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| 77 | sl = sheets.length, |
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| 78 | i = 0,
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| 79 | //vars for loop:
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| 80 | sheet, href, media, isCSS; |
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| 81 | |||
| 82 | for( ; i < sl; i++ ){
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| 83 | sheet = sheets[ i ], |
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| 84 | href = sheet.href, |
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| 85 | media = sheet.media, |
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| 86 | isCSS = sheet.rel && sheet.rel.toLowerCase() === "stylesheet";
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| 87 | |||
| 88 | //only links plz and prevent re-parsing
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| 89 | if( !!href && isCSS && !parsedSheets[ href ] ){
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| 90 | // selectivizr exposes css through the rawCssText expando
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| 91 | if (sheet.styleSheet && sheet.styleSheet.rawCssText) {
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| 92 | translate( sheet.styleSheet.rawCssText, href, media ); |
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| 93 | parsedSheets[ href ] = true;
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| 94 | } else {
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| 95 | if( (!/^([a-zA-Z:]*\/\/)/.test( href ) && !base) |
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| 96 | || href.replace( RegExp.$1, "" ).split( "/" )[0] === win.location.host ){ |
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| 97 | requestQueue.push( {
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| 98 | href: href,
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| 99 | media: media
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| 100 | } ); |
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| 101 | } |
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| 102 | } |
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| 103 | } |
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| 104 | } |
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| 105 | makeRequests(); |
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| 106 | }, |
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| 107 | |||
| 108 | //recurse through request queue, get css text
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| 109 | makeRequests = function(){ |
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| 110 | if( requestQueue.length ){
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| 111 | var thisRequest = requestQueue.shift();
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| 112 | |||
| 113 | ajax( thisRequest.href, function( styles ){
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| 114 | translate( styles, thisRequest.href, thisRequest.media ); |
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| 115 | parsedSheets[ thisRequest.href ] = true;
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| 116 | makeRequests(); |
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| 117 | } ); |
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| 118 | } |
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| 119 | }, |
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| 120 | |||
| 121 | //find media blocks in css text, convert to style blocks
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| 122 | translate = function( styles, href, media ){ |
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| 123 | var qs = styles.match( /@media[^\{]+\{([^\{\}]*\{[^\}\{]*\})+/gi ), |
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| 124 | ql = qs && qs.length || 0,
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| 125 | //try to get CSS path
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| 126 | href = href.substring( 0, href.lastIndexOf( "/" )), |
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| 127 | repUrls = function( css ){ |
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| 128 | return css.replace( /(url\()['"]?([^\/\)'"][^:\)'"]+)['"]?(\))/g, "$1" + href + "$2$3" ); |
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| 129 | }, |
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| 130 | useMedia = !ql && media, |
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| 131 | //vars used in loop
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| 132 | i = 0,
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| 133 | j, fullq, thisq, eachq, eql; |
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| 134 | |||
| 135 | //if path exists, tack on trailing slash
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| 136 | if( href.length ){ href += "/"; } |
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| 137 | |||
| 138 | //if no internal queries exist, but media attr does, use that
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| 139 | //note: this currently lacks support for situations where a media attr is specified on a link AND
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| 140 | //its associated stylesheet has internal CSS media queries.
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| 141 | //In those cases, the media attribute will currently be ignored.
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| 142 | if( useMedia ){
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| 143 | ql = 1;
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| 144 | } |
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| 145 | |||
| 146 | |||
| 147 | for( ; i < ql; i++ ){
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| 148 | j = 0;
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| 149 | |||
| 150 | //media attr
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| 151 | if( useMedia ){
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| 152 | fullq = media; |
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| 153 | rules.push( repUrls( styles ) ); |
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| 154 | } |
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| 155 | //parse for styles
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| 156 | else{
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| 157 | fullq = qs[ i ].match( /@media *([^\{]+)\{([\S\s]+?)$/ ) && RegExp.$1; |
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| 158 | rules.push( RegExp.$2 && repUrls( RegExp.$2 ) ); |
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| 159 | } |
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| 160 | |||
| 161 | eachq = fullq.split( "," );
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| 162 | eql = eachq.length; |
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| 163 | |||
| 164 | for( ; j < eql; j++ ){
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| 165 | thisq = eachq[ j ]; |
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| 166 | mediastyles.push( {
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| 167 | media : thisq.split( "(" )[ 0 ].match( /(only\s+)?([a-zA-Z]+)\s?/ ) && RegExp.$2 || "all", |
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| 168 | rules : rules.length - 1, |
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| 169 | hasquery: thisq.indexOf("(") > -1, |
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| 170 | minw : thisq.match( /\(min\-width:[\s]*([\s]*[0-9\.]+)(px|em)[\s]*\)/ ) && parseFloat( RegExp.$1 ) + ( RegExp.$2 || "" ), |
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| 171 | maxw : thisq.match( /\(max\-width:[\s]*([\s]*[0-9\.]+)(px|em)[\s]*\)/ ) && parseFloat( RegExp.$1 ) + ( RegExp.$2 || "" ) |
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| 172 | } ); |
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| 173 | } |
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| 174 | } |
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| 175 | |||
| 176 | applyMedia(); |
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| 177 | }, |
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| 178 | |||
| 179 | lastCall, |
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| 180 | |||
| 181 | resizeDefer, |
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| 182 | |||
| 183 | // returns the value of 1em in pixels
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| 184 | getEmValue = function() { |
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| 185 | var ret,
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| 186 | div = doc.createElement('div'),
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| 187 | body = doc.body, |
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| 188 | fakeUsed = false;
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| 189 | |||
| 190 | div.style.cssText = "position:absolute;font-size:1em;width:1em";
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| 191 | |||
| 192 | if( !body ){
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| 193 | body = fakeUsed = doc.createElement( "body" );
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| 194 | body.style.background = "none";
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| 195 | } |
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| 196 | |||
| 197 | body.appendChild( div ); |
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| 198 | |||
| 199 | docElem.insertBefore( body, docElem.firstChild ); |
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| 200 | |||
| 201 | ret = div.offsetWidth; |
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| 202 | |||
| 203 | if( fakeUsed ){
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| 204 | docElem.removeChild( body ); |
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| 205 | } |
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| 206 | else {
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| 207 | body.removeChild( div ); |
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| 208 | } |
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| 209 | |||
| 210 | //also update eminpx before returning
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| 211 | ret = eminpx = parseFloat(ret); |
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| 212 | |||
| 213 | return ret;
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| 214 | }, |
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| 215 | |||
| 216 | //cached container for 1em value, populated the first time it's needed
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| 217 | eminpx, |
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| 218 | |||
| 219 | //enable/disable styles
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| 220 | applyMedia = function( fromResize ){ |
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| 221 | var name = "clientWidth", |
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| 222 | docElemProp = docElem[ name ], |
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| 223 | currWidth = doc.compatMode === "CSS1Compat" && docElemProp || doc.body[ name ] || docElemProp,
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| 224 | styleBlocks = {},
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| 225 | lastLink = links[ links.length-1 ],
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| 226 | now = (new Date()).getTime();
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| 227 | |||
| 228 | //throttle resize calls
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| 229 | if( fromResize && lastCall && now - lastCall < resizeThrottle ){
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| 230 | clearTimeout( resizeDefer ); |
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| 231 | resizeDefer = setTimeout( applyMedia, resizeThrottle ); |
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| 232 | return;
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| 233 | } |
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| 234 | else {
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| 235 | lastCall = now; |
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| 236 | } |
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| 237 | |||
| 238 | for( var i in mediastyles ){ |
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| 239 | var thisstyle = mediastyles[ i ],
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| 240 | min = thisstyle.minw, |
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| 241 | max = thisstyle.maxw, |
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| 242 | minnull = min === null,
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| 243 | maxnull = max === null,
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| 244 | em = "em";
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| 245 | |||
| 246 | if( !!min ){
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| 247 | min = parseFloat( min ) * ( min.indexOf( em ) > -1 ? ( eminpx || getEmValue() ) : 1 ); |
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| 248 | } |
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| 249 | if( !!max ){
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| 250 | max = parseFloat( max ) * ( max.indexOf( em ) > -1 ? ( eminpx || getEmValue() ) : 1 ); |
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| 251 | } |
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| 252 | |||
| 253 | // if there's no media query at all (the () part), or min or max is not null, and if either is present, they're true
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| 254 | if( !thisstyle.hasquery || ( !minnull || !maxnull ) && ( minnull || currWidth >= min ) && ( maxnull || currWidth <= max ) ){
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| 255 | if( !styleBlocks[ thisstyle.media ] ){
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| 256 | styleBlocks[ thisstyle.media ] = []; |
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| 257 | } |
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| 258 | styleBlocks[ thisstyle.media ].push( rules[ thisstyle.rules ] ); |
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| 259 | } |
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| 260 | } |
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| 261 | |||
| 262 | //remove any existing respond style element(s)
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| 263 | for( var i in appendedEls ){ |
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| 264 | if( appendedEls[ i ] && appendedEls[ i ].parentNode === head ){
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| 265 | head.removeChild( appendedEls[ i ] ); |
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| 266 | } |
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| 267 | } |
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| 268 | |||
| 269 | //inject active styles, grouped by media type
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| 270 | for( var i in styleBlocks ){ |
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| 271 | var ss = doc.createElement( "style" ), |
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| 272 | css = styleBlocks[ i ].join( "\n" );
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| 273 | |||
| 274 | ss.type = "text/css";
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| 275 | ss.media = i; |
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| 276 | |||
| 277 | //originally, ss was appended to a documentFragment and sheets were appended in bulk.
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| 278 | //this caused crashes in IE in a number of circumstances, such as when the HTML element had a bg image set, so appending beforehand seems best. Thanks to @dvelyk for the initial research on this one!
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| 279 | head.insertBefore( ss, lastLink.nextSibling ); |
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| 280 | |||
| 281 | if ( ss.styleSheet ){
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| 282 | ss.styleSheet.cssText = css; |
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| 283 | } |
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| 284 | else {
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| 285 | ss.appendChild( doc.createTextNode( css ) ); |
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| 286 | } |
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| 287 | |||
| 288 | //push to appendedEls to track for later removal
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| 289 | appendedEls.push( ss ); |
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| 290 | } |
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| 291 | }, |
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| 292 | //tweaked Ajax functions from Quirksmode
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| 293 | ajax = function( url, callback ) { |
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| 294 | var req = xmlHttp();
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| 295 | if (!req){
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| 296 | return;
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| 297 | } |
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| 298 | req.open( "GET", url, true ); |
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| 299 | req.onreadystatechange = function () { |
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| 300 | if ( req.readyState != 4 || req.status != 200 && req.status != 304 ){ |
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| 301 | return;
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| 302 | } |
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| 303 | callback( req.responseText ); |
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| 304 | } |
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| 305 | if ( req.readyState == 4 ){ |
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| 306 | return;
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| 307 | } |
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| 308 | req.send( null );
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| 309 | }, |
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| 310 | //define ajax obj
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| 311 | xmlHttp = (function() {
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| 312 | var xmlhttpmethod = false; |
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| 313 | try {
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| 314 | xmlhttpmethod = new XMLHttpRequest();
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| 315 | } |
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| 316 | catch( e ){
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| 317 | xmlhttpmethod = new ActiveXObject( "Microsoft.XMLHTTP" ); |
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| 318 | } |
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| 319 | return function(){ |
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| 320 | return xmlhttpmethod;
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| 321 | }; |
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| 322 | })(); |
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| 323 | |||
| 324 | //translate CSS
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| 325 | ripCSS(); |
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| 326 | |||
| 327 | //expose update for re-running respond later on
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| 328 | respond.update = ripCSS; |
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| 329 | |||
| 330 | //adjust on resize
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| 331 | function callMedia(){ |
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| 332 | applyMedia( true );
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| 333 | } |
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| 334 | if( win.addEventListener ){
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| 335 | win.addEventListener( "resize", callMedia, false ); |
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| 336 | } |
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| 337 | else if( win.attachEvent ){ |
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| 338 | win.attachEvent( "onresize", callMedia );
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| 339 | } |
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| 340 | })(this); |
