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Update LessLoader to be capable of loading CSS as well as less files and properly rewrite the URLs

This commit is contained in:
Caleb James DeLisle 2017-09-13 14:46:41 +02:00
parent 63cb5dfc1e
commit d46cc8226d
1 changed files with 28 additions and 13 deletions
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41
www/common/LessLoader.js
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@ -18,12 +18,15 @@ define([
localStorage = {};
}
var fixURL = function (url) {
var fixURL = function (url, parent) {
// data: blob: etc
if (!/^(\/|http)/.test(url)) { return url; }
if (/^[a-zA-Z0-9]*:/.test(url)) { return url; }
var ua = url.split('#');
var mark = (ua[0].indexOf('?') !== -1) ? '&' : '?';
ua[0] = ua[0] + mark + key;
if (ua[0].indexOf(':') === -1 && ua[0].indexOf('/') && parent) {
ua[0] = parent.replace(/\/[^\/]*$/, '/') + ua[0];
}
var out = ua.join('#');
console.log(url + " --> " + out);
return out;
@ -54,13 +57,13 @@ define([
localStorage['LESS_CACHE'] = key;
};
var fixAllURLs = function (source) {
var fixAllURLs = function (source, parent) {
var urlRegEx = /@import\s*("([^"]*)"|'([^']*)')|url\s*\(\s*(\s*"([^"]*)"|'([^']*)'|[^\)]*\s*)\s*\)/ig;
var result, url;
while (!!(result = urlRegEx.exec(source))) {
url = result[3] || result[2] || result[5] || result[6] || result[4];
var newUrl = fixURL(url);
var newUrl = fixURL(url, parent);
var quoteLen = result[5] || result[6] ? 1 : 0;
source = source.substr(0, urlRegEx.lastIndex - url.length - quoteLen - 1)
+ newUrl + source.substr(urlRegEx.lastIndex - quoteLen - 1);
@ -70,6 +73,24 @@ define([
return source;
};
var loadCSS = function (url, cb) {
var xhr = new window.XMLHttpRequest();
xhr.open("GET", fixURL(url), true);
xhr.responseType = 'text';
xhr.onload = function () {
if (/^4/.test('' + this.status)) { return cb("error loading " + url); }
cb(undefined, xhr.response);
};
xhr.send(null);
};
var loadLess = function (url, cb) {
Less.render('@import (multiple) "' + url + '";', {}, function(err, css) {
if (err) { return void cb(err); }
cb(undefined, css.css);
}, window.less);
};
module.exports.load = function (url /*:string*/, cb /*:()=>void*/) {
checkCache();
if (localStorage['LESS_CACHE|' + key + '|' + url]) {
@ -77,18 +98,12 @@ define([
cb();
return;
}
Less.render('@import (multiple) "' + url + '";', {}, function(err, css) {
if (err) {
console.log(err);
return;
}
var output = fixAllURLs(css.css);
window.lc = window.lc || {};
window.lc['LESS_CACHE|' + key + '|' + url] = output;
((/\.less([\?\#].*)?$/.test(url)) ? loadLess : loadCSS)(url, function (err, css) {
var output = fixAllURLs(css, url);
localStorage['LESS_CACHE|' + key + '|' + url] = output;
inject(output, url);
cb();
}, window.less);
});
};
return module.exports;