зеркало из https://github.com/mozilla/gecko-dev.git
127 строки
3.5 KiB
JavaScript
127 строки
3.5 KiB
JavaScript
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// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
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this.EXPORTED_SYMBOLS = [ "ReaderParent" ];
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/Task.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "ReaderMode", "resource://gre/modules/ReaderMode.jsm");
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let ReaderParent = {
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MESSAGES: [
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"Reader:AddToList",
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"Reader:ArticleGet",
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"Reader:FaviconRequest",
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"Reader:ListStatusRequest",
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"Reader:RemoveFromList",
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"Reader:Share",
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"Reader:ShowToast",
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"Reader:ToolbarVisibility",
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"Reader:SystemUIVisibility",
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"Reader:UpdateIsArticle",
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],
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init: function() {
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let mm = Cc["@mozilla.org/globalmessagemanager;1"].getService(Ci.nsIMessageListenerManager);
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for (let msg of this.MESSAGES) {
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mm.addMessageListener(msg, this);
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}
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},
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receiveMessage: function(message) {
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switch (message.name) {
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case "Reader:AddToList":
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// XXX: To implement.
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break;
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case "Reader:ArticleGet":
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this._getArticle(message.data.url, message.target).then((article) => {
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message.target.messageManager.sendAsyncMessage("Reader:ArticleData", { article: article });
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});
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break;
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case "Reader:FaviconRequest": {
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// XXX: To implement.
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break;
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}
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case "Reader:ListStatusRequest":
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// XXX: To implement.
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break;
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case "Reader:RemoveFromList":
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// XXX: To implement.
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break;
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case "Reader:Share":
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// XXX: To implement.
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break;
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case "Reader:ShowToast":
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// XXX: To implement.
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break;
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case "Reader:SystemUIVisibility":
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// XXX: To implement.
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break;
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case "Reader:ToolbarVisibility":
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// XXX: To implement.
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break;
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case "Reader:UpdateIsArticle": {
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// XXX: To implement.
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break;
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}
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}
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},
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/**
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* Gets an article for a given URL. This method will download and parse a document
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* if it does not find the article in the tab data or the cache.
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*
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* @param url The article URL.
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* @param browser The browser where the article is currently loaded.
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* @return {Promise}
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* @resolves JS object representing the article, or null if no article is found.
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*/
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_getArticle: Task.async(function* (url, browser) {
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// First, look for a saved article.
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let article = yield this._getSavedArticle(browser);
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if (article && article.url == url) {
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return article;
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}
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// Next, try to find a parsed article in the cache.
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let uri = Services.io.newURI(url, null, null);
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article = yield ReaderMode.getArticleFromCache(uri);
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if (article) {
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return article;
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}
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// Article hasn't been found in the cache, we need to
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// download the page and parse the article out of it.
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return yield ReaderMode.downloadAndParseDocument(url);
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}),
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_getSavedArticle: function(browser) {
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return new Promise((resolve, reject) => {
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let mm = browser.messageManager;
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let listener = (message) => {
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mm.removeMessageListener("Reader:SavedArticleData", listener);
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resolve(message.data.article);
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};
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mm.addMessageListener("Reader:SavedArticleData", listener);
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mm.sendAsyncMessage("Reader:SavedArticleGet");
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});
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}
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};
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