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cryptpad/www/common/LessLoader.js

64 lines
2.1 KiB
JavaScript

/*@flow*/
/*:: const define = () => {}; */
define([
'/api/config',
'/bower_components/less/dist/less.js'
], function (Config, Less) { /*::});module.exports = (function() {
const Config = (undefined:any);
const Less = (undefined:any);
*/
var module = { exports: {} };
var key = Config.requireConf.urlArgs;
var localStorage = window.localStorage || {};
var fixURL = function (url) {
var mark = (url.indexOf('?') !== -1) ? '&' : '?';
return url + mark + key;
};
var doXHR = Less.FileManager.prototype.doXHR;
Less.FileManager.prototype.doXHR = function (url, type, callback, errback) {
url = fixURL(url);
//console.log("xhr: " + url);
return doXHR(url, type, callback, errback);
};
var inject = function (cssText, url) {
var curStyle = document.createElement('style');
curStyle.setAttribute('data-original-src', url);
curStyle.type = 'text/css';
curStyle.appendChild(document.createTextNode(cssText));
if (!document.head) { throw new Error(); }
document.head.appendChild(curStyle);
};
var checkCache = function () {
if (localStorage['LESS_CACHE'] === key) { return; }
Object.keys(localStorage).forEach(function (k) {
if (k.indexOf('LESS_CACHE|') !== 0) { return; }
delete localStorage[k];
});
localStorage['LESS_CACHE'] = key;
};
var load = module.exports.load = function (url /*:string*/, cb /*:()=>void*/) {
checkCache();
if (localStorage['LESS_CACHE|' + key + '|' + url]) {
inject(localStorage['LESS_CACHE|' + key + '|' + url], url);
cb();
return;
}
Less.render('@import (multiple) "' + url + '";', {}, function(err, css) {
if (err) {
console.log(err);
return;
}
localStorage['LESS_CACHE|' + key + '|' + url] = css.css;
inject(css.css, url);
cb();
}, window.less);
};
return module.exports;
})/*::()*/;