224 lines
8.3 KiB
JavaScript
224 lines
8.3 KiB
JavaScript
/*! 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);
|
|
|
|
/*! 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); |