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- /*! Respond.js v1.4.2: min/max-width media query polyfill
- * Copyright 2014 Scott Jehl
- * Licensed under MIT
- * http://j.mp/respondjs */
-
- /*! matchMedia() polyfill - Test a CSS media type/query in JS. Authors & copyright (c) 2012: Scott Jehl, Paul Irish, Nicholas Zakas. Dual MIT/BSD license */
- /*! NOTE: If you're already including a window.matchMedia polyfill via Modernizr or otherwise, you don't need this part */
- (function(w) {
- "use strict";
- w.matchMedia = w.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
- };
- };
- }(w.document);
- })(this);
-
- (function(w) {
- "use strict";
- var respond = {};
- w.respond = respond;
- respond.update = function() {};
- var requestQueue = [], xmlHttp = function() {
- var xmlhttpmethod = false;
- try {
- xmlhttpmethod = new w.XMLHttpRequest();
- } catch (e) {
- xmlhttpmethod = new w.ActiveXObject("Microsoft.XMLHTTP");
- }
- return function() {
- return xmlhttpmethod;
- };
- }(), 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);
- }, isUnsupportedMediaQuery = function(query) {
- return query.replace(respond.regex.minmaxwh, "").match(respond.regex.other);
- };
- respond.ajax = ajax;
- respond.queue = requestQueue;
- respond.unsupportedmq = isUnsupportedMediaQuery;
- respond.regex = {
- media: /@media[^\{]+\{([^\{\}]*\{[^\}\{]*\})+/gi,
- keyframes: /@(?:\-(?:o|moz|webkit)\-)?keyframes[^\{]+\{(?:[^\{\}]*\{[^\}\{]*\})+[^\}]*\}/gi,
- comments: /\/\*[^*]*\*+([^/][^*]*\*+)*\//gi,
- urls: /(url\()['"]?([^\/\)'"][^:\)'"]+)['"]?(\))/g,
- findStyles: /@media *([^\{]+)\{([\S\s]+?)$/,
- only: /(only\s+)?([a-zA-Z]+)\s?/,
- minw: /\(\s*min\-width\s*:\s*(\s*[0-9\.]+)(px|em)\s*\)/,
- maxw: /\(\s*max\-width\s*:\s*(\s*[0-9\.]+)(px|em)\s*\)/,
- minmaxwh: /\(\s*m(in|ax)\-(height|width)\s*:\s*(\s*[0-9\.]+)(px|em)\s*\)/gi,
- other: /\([^\)]*\)/g
- };
- respond.mediaQueriesSupported = w.matchMedia && w.matchMedia("only all") !== null && w.matchMedia("only all").matches;
- if (respond.mediaQueriesSupported) {
- return;
- }
- var doc = w.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"), lastCall, resizeDefer, eminpx, getEmValue = function() {
- var ret, div = doc.createElement("div"), body = doc.body, originalHTMLFontSize = docElem.style.fontSize, originalBodyFontSize = body && body.style.fontSize, fakeUsed = false;
- div.style.cssText = "position:absolute;font-size:1em;width:1em";
- if (!body) {
- body = fakeUsed = doc.createElement("body");
- body.style.background = "none";
- }
- docElem.style.fontSize = "100%";
- body.style.fontSize = "100%";
- body.appendChild(div);
- if (fakeUsed) {
- docElem.insertBefore(body, docElem.firstChild);
- }
- ret = div.offsetWidth;
- if (fakeUsed) {
- docElem.removeChild(body);
- } else {
- body.removeChild(div);
- }
- docElem.style.fontSize = originalHTMLFontSize;
- if (originalBodyFontSize) {
- body.style.fontSize = originalBodyFontSize;
- }
- ret = eminpx = parseFloat(ret);
- return ret;
- }, 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) {
- w.clearTimeout(resizeDefer);
- resizeDefer = w.setTimeout(applyMedia, resizeThrottle);
- return;
- } else {
- lastCall = now;
- }
- for (var i in mediastyles) {
- if (mediastyles.hasOwnProperty(i)) {
- 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 j in appendedEls) {
- if (appendedEls.hasOwnProperty(j)) {
- if (appendedEls[j] && appendedEls[j].parentNode === head) {
- head.removeChild(appendedEls[j]);
- }
- }
- }
- appendedEls.length = 0;
- for (var k in styleBlocks) {
- if (styleBlocks.hasOwnProperty(k)) {
- var ss = doc.createElement("style"), css = styleBlocks[k].join("\n");
- ss.type = "text/css";
- ss.media = k;
- head.insertBefore(ss, lastLink.nextSibling);
- if (ss.styleSheet) {
- ss.styleSheet.cssText = css;
- } else {
- ss.appendChild(doc.createTextNode(css));
- }
- appendedEls.push(ss);
- }
- }
- }, translate = function(styles, href, media) {
- var qs = styles.replace(respond.regex.comments, "").replace(respond.regex.keyframes, "").match(respond.regex.media), ql = qs && qs.length || 0;
- href = href.substring(0, href.lastIndexOf("/"));
- var repUrls = function(css) {
- return css.replace(respond.regex.urls, "$1" + href + "$2$3");
- }, useMedia = !ql && media;
- if (href.length) {
- href += "/";
- }
- if (useMedia) {
- ql = 1;
- }
- for (var i = 0; i < ql; i++) {
- var fullq, thisq, eachq, eql;
- if (useMedia) {
- fullq = media;
- rules.push(repUrls(styles));
- } else {
- fullq = qs[i].match(respond.regex.findStyles) && RegExp.$1;
- rules.push(RegExp.$2 && repUrls(RegExp.$2));
- }
- eachq = fullq.split(",");
- eql = eachq.length;
- for (var j = 0; j < eql; j++) {
- thisq = eachq[j];
- if (isUnsupportedMediaQuery(thisq)) {
- continue;
- }
- mediastyles.push({
- media: thisq.split("(")[0].match(respond.regex.only) && RegExp.$2 || "all",
- rules: rules.length - 1,
- hasquery: thisq.indexOf("(") > -1,
- minw: thisq.match(respond.regex.minw) && parseFloat(RegExp.$1) + (RegExp.$2 || ""),
- maxw: thisq.match(respond.regex.maxw) && parseFloat(RegExp.$1) + (RegExp.$2 || "")
- });
- }
- }
- applyMedia();
- }, makeRequests = function() {
- if (requestQueue.length) {
- var thisRequest = requestQueue.shift();
- ajax(thisRequest.href, function(styles) {
- translate(styles, thisRequest.href, thisRequest.media);
- parsedSheets[thisRequest.href] = true;
- w.setTimeout(function() {
- makeRequests();
- }, 0);
- });
- }
- }, ripCSS = function() {
- for (var i = 0; i < links.length; i++) {
- var sheet = links[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] === w.location.host) {
- if (href.substring(0, 2) === "//") {
- href = w.location.protocol + href;
- }
- requestQueue.push({
- href: href,
- media: media
- });
- }
- }
- }
- }
- makeRequests();
- };
- ripCSS();
- respond.update = ripCSS;
- respond.getEmValue = getEmValue;
- function callMedia() {
- applyMedia(true);
- }
- if (w.addEventListener) {
- w.addEventListener("resize", callMedia, false);
- } else if (w.attachEvent) {
- w.attachEvent("onresize", callMedia);
- }
- })(this);
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