/*! 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 = '­'; docElem.insertBefore(fakeBody, refNode); bool = div.offsetWidth === 42; docElem.removeChild(fakeBody); return { matches: bool, media: q }; }; }(w.document); })(this); /*! matchMedia() polyfill addListener/removeListener extension. Author & copyright (c) 2012: Scott Jehl. Dual MIT/BSD license */ (function(w) { "use strict"; if (w.matchMedia && w.matchMedia("all").addListener) { return false; } var localMatchMedia = w.matchMedia, hasMediaQueries = localMatchMedia("only all").matches, isListening = false, timeoutID = 0, queries = [], handleChange = function(evt) { w.clearTimeout(timeoutID); timeoutID = w.setTimeout(function() { for (var i = 0, il = queries.length; i < il; i++) { var mql = queries[i].mql, listeners = queries[i].listeners || [], matches = localMatchMedia(mql.media).matches; if (matches !== mql.matches) { mql.matches = matches; for (var j = 0, jl = listeners.length; j < jl; j++) { listeners[j].call(w, mql); } } } }, 30); }; w.matchMedia = function(media) { var mql = localMatchMedia(media), listeners = [], index = 0; mql.addListener = function(listener) { if (!hasMediaQueries) { return; } if (!isListening) { isListening = true; w.addEventListener("resize", handleChange, true); } if (index === 0) { index = queries.push({ mql: mql, listeners: listeners }); } listeners.push(listener); }; mql.removeListener = function(listener) { for (var i = 0, il = listeners.length; i < il; i++) { if (listeners[i] === listener) { listeners.splice(i, 1); } } }; return mql; }; })(this); /*! Respond.js v1.4.0: min/max-width media query polyfill. (c) Scott Jehl. MIT Lic. j.mp/respondjs */ (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); }; respond.ajax = ajax; respond.queue = requestQueue; respond.regex = { media: /@media[^\{]+\{([^\{\}]*\{[^\}\{]*\})+/gi, keyframes: /@(?:\-(?:o|moz|webkit)\-)?keyframes[^\{]+\{(?:[^\{\}]*\{[^\}\{]*\})+[^\}]*\}/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: /\([\s]*max\-width\s*:[\s]*([\s]*[0-9\.]+)(px|em)[\s]*\)/ }; 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.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]; 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);