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// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
this.EXPORTED_SYMBOLS = [ "ReaderParent" ];
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "PlacesUtils", "resource://gre/modules/PlacesUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "ReaderMode", "resource://gre/modules/ReaderMode.jsm");
const gStringBundle = Services.strings.createBundle("chrome://global/locale/aboutReader.properties");
var ReaderParent = {
MESSAGES: [
"Reader:ArticleGet",
"Reader:FaviconRequest",
"Reader:UpdateReaderButton",
],
init() {
let mm = Cc["@mozilla.org/globalmessagemanager;1"].getService(Ci.nsIMessageListenerManager);
for (let msg of this.MESSAGES) {
mm.addMessageListener(msg, this);
}
},
receiveMessage(message) {
switch (message.name) {
case "Reader:ArticleGet":
this._getArticle(message.data.url, message.target).then((article) => {
// Make sure the target browser is still alive before trying to send data back.
if (message.target.messageManager) {
message.target.messageManager.sendAsyncMessage("Reader:ArticleData", { article: article });
}
}, e => {
if (e && e.newURL) {
// Make sure the target browser is still alive before trying to send data back.
if (message.target.messageManager) {
message.target.messageManager.sendAsyncMessage("Reader:ArticleData", { newURL: e.newURL });
}
}
});
break;
case "Reader:FaviconRequest": {
if (message.target.messageManager) {
let faviconUrl = PlacesUtils.promiseFaviconLinkUrl(message.data.url);
faviconUrl.then(function onResolution(favicon) {
message.target.messageManager.sendAsyncMessage("Reader:FaviconReturn", {
url: message.data.url,
faviconUrl: favicon.path.replace(/^favicon:/, "")
});
},
function onRejection(reason) {
Cu.reportError("Error requesting favicon URL for about:reader content: " + reason);
}).catch(Cu.reportError);
}
break;
}
case "Reader:UpdateReaderButton": {
let browser = message.target;
if (message.data && message.data.isArticle !== undefined) {
browser.isArticle = message.data.isArticle;
}
this.updateReaderButton(browser);
break;
}
}
},
updateReaderButton(browser) {
let win = browser.ownerGlobal;
if (browser != win.gBrowser.selectedBrowser) {
return;
}
let button = win.document.getElementById("reader-mode-button");
let command = win.document.getElementById("View:ReaderView");
let key = win.document.getElementById("key_toggleReaderMode");
// aria-reader is not a real ARIA attribute. However, this will cause
// Gecko accessibility to expose the "reader" object attribute. We do this
// so that the reader state is easy for accessibility clients to access
// programmatically.
if (browser.currentURI.spec.startsWith("about:reader")) {
button.setAttribute("readeractive", true);
button.hidden = false;
let closeText = gStringBundle.GetStringFromName("readerView.close");
button.setAttribute("tooltiptext", closeText);
command.setAttribute("label", closeText);
command.setAttribute("hidden", false);
command.setAttribute("accesskey", gStringBundle.GetStringFromName("readerView.close.accesskey"));
key.setAttribute("disabled", false);
browser.setAttribute("aria-reader", "active");
} else {
button.removeAttribute("readeractive");
button.hidden = !browser.isArticle;
let enterText = gStringBundle.GetStringFromName("readerView.enter");
button.setAttribute("tooltiptext", enterText);
command.setAttribute("label", enterText);
command.setAttribute("hidden", !browser.isArticle);
command.setAttribute("accesskey", gStringBundle.GetStringFromName("readerView.enter.accesskey"));
key.setAttribute("disabled", !browser.isArticle);
if (browser.isArticle) {
browser.setAttribute("aria-reader", "available");
} else {
browser.removeAttribute("aria-reader");
}
}
},
forceShowReaderIcon(browser) {
browser.isArticle = true;
this.updateReaderButton(browser);
},
buttonClick(event) {
if (event.button != 0) {
return;
}
this.toggleReaderMode(event);
},
toggleReaderMode(event) {
let win = event.target.ownerGlobal;
let browser = win.gBrowser.selectedBrowser;
browser.messageManager.sendAsyncMessage("Reader:ToggleReaderMode");
},
/**
* Gets an article for a given URL. This method will download and parse a document.
*
* @param url The article URL.
* @param browser The browser where the article is currently loaded.
* @return {Promise}
* @resolves JS object representing the article, or null if no article is found.
*/
async _getArticle(url, browser) {
return await ReaderMode.downloadAndParseDocument(url).catch(e => {
if (e && e.newURL) {
// Pass up the error so we can navigate the browser in question to the new URL:
throw e;
}
Cu.reportError("Error downloading and parsing document: " + e);
return null;
});
}
};
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