114 lines
3.7 KiB
JavaScript
114 lines
3.7 KiB
JavaScript
/* global window, XMLHttpRequest */
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import AbstractFileManager from '../less/environment/abstract-file-manager.js';
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let options;
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let logger;
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let fileCache = {};
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// TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load
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class FileManager extends AbstractFileManager {
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alwaysMakePathsAbsolute() {
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return true;
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}
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join(basePath, laterPath) {
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if (!basePath) {
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return laterPath;
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}
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return this.extractUrlParts(laterPath, basePath).path;
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}
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doXHR(url, type, callback, errback) {
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const xhr = new XMLHttpRequest();
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const async = options.isFileProtocol ? options.fileAsync : true;
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if (typeof xhr.overrideMimeType === 'function') {
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xhr.overrideMimeType('text/css');
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}
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logger.debug(`XHR: Getting '${url}'`);
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xhr.open('GET', url, async);
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xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5');
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xhr.send(null);
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function handleResponse(xhr, callback, errback) {
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if (xhr.status >= 200 && xhr.status < 300) {
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callback(xhr.responseText,
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xhr.getResponseHeader('Last-Modified'));
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} else if (typeof errback === 'function') {
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errback(xhr.status, url);
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}
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}
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if (options.isFileProtocol && !options.fileAsync) {
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if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) {
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callback(xhr.responseText);
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} else {
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errback(xhr.status, url);
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}
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} else if (async) {
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xhr.onreadystatechange = () => {
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if (xhr.readyState == 4) {
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handleResponse(xhr, callback, errback);
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}
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};
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} else {
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handleResponse(xhr, callback, errback);
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}
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}
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supports() {
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return true;
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}
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clearFileCache() {
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fileCache = {};
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}
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loadFile(filename, currentDirectory, options, environment) {
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// TODO: Add prefix support like less-node?
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// What about multiple paths?
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if (currentDirectory && !this.isPathAbsolute(filename)) {
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filename = currentDirectory + filename;
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}
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filename = options.ext ? this.tryAppendExtension(filename, options.ext) : filename;
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options = options || {};
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// sheet may be set to the stylesheet for the initial load or a collection of properties including
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// some context variables for imports
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const hrefParts = this.extractUrlParts(filename, window.location.href);
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const href = hrefParts.url;
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const self = this;
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return new Promise((resolve, reject) => {
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if (options.useFileCache && fileCache[href]) {
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try {
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const lessText = fileCache[href];
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return resolve({ contents: lessText, filename: href, webInfo: { lastModified: new Date() }});
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} catch (e) {
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return reject({ filename: href, message: `Error loading file ${href} error was ${e.message}` });
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}
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}
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self.doXHR(href, options.mime, function doXHRCallback(data, lastModified) {
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// per file cache
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fileCache[href] = data;
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// Use remote copy (re-parse)
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resolve({ contents: data, filename: href, webInfo: { lastModified }});
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}, function doXHRError(status, url) {
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reject({ type: 'File', message: `'${url}' wasn't found (${status})`, href });
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});
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});
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}
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}
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export default (opts, log) => {
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options = opts;
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logger = log;
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return FileManager;
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}
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