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gecko-dev/browser/base/content/browser-feeds.js

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JavaScript
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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/. */
XPCOMUtils.defineLazyModuleGetter(this, "DeferredTask",
"resource://gre/modules/DeferredTask.jsm");
const TYPE_MAYBE_FEED = "application/vnd.mozilla.maybe.feed";
const TYPE_MAYBE_AUDIO_FEED = "application/vnd.mozilla.maybe.audio.feed";
const TYPE_MAYBE_VIDEO_FEED = "application/vnd.mozilla.maybe.video.feed";
const PREF_SHOW_FIRST_RUN_UI = "browser.feeds.showFirstRunUI";
const PREF_SELECTED_APP = "browser.feeds.handlers.application";
const PREF_SELECTED_WEB = "browser.feeds.handlers.webservice";
const PREF_SELECTED_ACTION = "browser.feeds.handler";
const PREF_SELECTED_READER = "browser.feeds.handler.default";
const PREF_VIDEO_SELECTED_APP = "browser.videoFeeds.handlers.application";
const PREF_VIDEO_SELECTED_WEB = "browser.videoFeeds.handlers.webservice";
const PREF_VIDEO_SELECTED_ACTION = "browser.videoFeeds.handler";
const PREF_VIDEO_SELECTED_READER = "browser.videoFeeds.handler.default";
const PREF_AUDIO_SELECTED_APP = "browser.audioFeeds.handlers.application";
const PREF_AUDIO_SELECTED_WEB = "browser.audioFeeds.handlers.webservice";
const PREF_AUDIO_SELECTED_ACTION = "browser.audioFeeds.handler";
const PREF_AUDIO_SELECTED_READER = "browser.audioFeeds.handler.default";
const PREF_UPDATE_DELAY = 2000;
const SETTABLE_PREFS = new Set([
PREF_VIDEO_SELECTED_ACTION,
PREF_AUDIO_SELECTED_ACTION,
PREF_SELECTED_ACTION,
PREF_VIDEO_SELECTED_READER,
PREF_AUDIO_SELECTED_READER,
PREF_SELECTED_READER,
PREF_VIDEO_SELECTED_WEB,
PREF_AUDIO_SELECTED_WEB,
PREF_SELECTED_WEB
]);
const EXECUTABLE_PREFS = new Set([
PREF_SELECTED_APP,
PREF_VIDEO_SELECTED_APP,
PREF_AUDIO_SELECTED_APP
]);
const VALID_ACTIONS = new Set(["ask", "reader", "bookmarks"]);
const VALID_READERS = new Set(["web", "client", "default", "bookmarks"]);
XPCOMUtils.defineLazyPreferenceGetter(this, "SHOULD_LOG",
"feeds.log", false);
function LOG(str) {
if (SHOULD_LOG)
dump("*** Feeds: " + str + "\n");
}
function getPrefActionForType(t) {
switch (t) {
case Ci.nsIFeed.TYPE_VIDEO:
return PREF_VIDEO_SELECTED_ACTION;
case Ci.nsIFeed.TYPE_AUDIO:
return PREF_AUDIO_SELECTED_ACTION;
default:
return PREF_SELECTED_ACTION;
}
}
function getPrefReaderForType(t) {
switch (t) {
case Ci.nsIFeed.TYPE_VIDEO:
return PREF_VIDEO_SELECTED_READER;
case Ci.nsIFeed.TYPE_AUDIO:
return PREF_AUDIO_SELECTED_READER;
default:
return PREF_SELECTED_READER;
}
}
function getPrefWebForType(t) {
switch (t) {
case Ci.nsIFeed.TYPE_VIDEO:
return PREF_VIDEO_SELECTED_WEB;
case Ci.nsIFeed.TYPE_AUDIO:
return PREF_AUDIO_SELECTED_WEB;
default:
return PREF_SELECTED_WEB;
}
}
function getPrefAppForType(t) {
switch (t) {
case Ci.nsIFeed.TYPE_VIDEO:
return PREF_VIDEO_SELECTED_APP;
case Ci.nsIFeed.TYPE_AUDIO:
return PREF_AUDIO_SELECTED_APP;
default:
return PREF_SELECTED_APP;
}
}
/**
* Maps a feed type to a maybe-feed mimetype.
*/
function getMimeTypeForFeedType(aFeedType) {
switch (aFeedType) {
case Ci.nsIFeed.TYPE_VIDEO:
return TYPE_MAYBE_VIDEO_FEED;
case Ci.nsIFeed.TYPE_AUDIO:
return TYPE_MAYBE_AUDIO_FEED;
default:
return TYPE_MAYBE_FEED;
}
}
/**
* The Feed Handler object manages discovery of RSS/ATOM feeds in web pages
* and shows UI when they are discovered.
*/
var FeedHandler = {
_prefChangeCallback: null,
/** Called when the user clicks on the Subscribe to This Page... menu item,
* or when the user clicks the feed button when the page contains multiple
* feeds.
* Builds a menu of unique feeds associated with the page, and if there
* is only one, shows the feed inline in the browser window.
* @param container
* The feed list container (menupopup or subview) to be populated.
* @param isSubview
* Whether we're creating a subview (true) or menu (false/undefined)
* @return true if the menu/subview should be shown, false if there was only
* one feed and the feed should be shown inline in the browser
* window (do not show the menupopup/subview).
*/
buildFeedList(container, isSubview) {
let feeds = gBrowser.selectedBrowser.feeds;
if (!isSubview && feeds == null) {
// XXX hack -- menu opening depends on setting of an "open"
// attribute, and the menu refuses to open if that attribute is
// set (because it thinks it's already open). onpopupshowing gets
// called after the attribute is unset, and it doesn't get unset
// if we return false. so we unset it here; otherwise, the menu
// refuses to work past this point.
container.parentNode.removeAttribute("open");
return false;
}
for (let i = container.childNodes.length - 1; i >= 0; --i) {
let node = container.childNodes[i];
if (isSubview && node.localName == "label")
continue;
container.removeChild(node);
}
if (!feeds || feeds.length <= 1)
return false;
// Build the menu showing the available feed choices for viewing.
let itemNodeType = isSubview ? "toolbarbutton" : "menuitem";
for (let feedInfo of feeds) {
let item = document.createElement(itemNodeType);
let baseTitle = feedInfo.title || feedInfo.href;
item.setAttribute("label", baseTitle);
item.setAttribute("feed", feedInfo.href);
item.setAttribute("tooltiptext", feedInfo.href);
item.setAttribute("crop", "center");
let className = "feed-" + itemNodeType;
if (isSubview) {
className += " subviewbutton";
}
item.setAttribute("class", className);
container.appendChild(item);
}
return true;
},
/**
* Subscribe to a given feed. Called when
* 1. Page has a single feed and user clicks feed icon in location bar
* 2. Page has a single feed and user selects Subscribe menu item
* 3. Page has multiple feeds and user selects from feed icon popup (or subview)
* 4. Page has multiple feeds and user selects from Subscribe submenu
* @param href
* The feed to subscribe to. May be null, in which case the
* event target's feed attribute is examined.
* @param event
* The event this method is handling. Used to decide where
* to open the preview UI. (Optional, unless href is null)
*/
subscribeToFeed(href, event) {
// Just load the feed in the content area to either subscribe or show the
// preview UI
if (!href)
href = event.target.getAttribute("feed");
urlSecurityCheck(href, gBrowser.contentPrincipal,
Ci.nsIScriptSecurityManager.DISALLOW_INHERIT_PRINCIPAL);
let feedURI = makeURI(href, document.characterSet);
// Use the feed scheme so X-Moz-Is-Feed will be set
// The value doesn't matter
if (/^https?$/.test(feedURI.scheme))
href = "feed:" + href;
this.loadFeed(href, event);
},
loadFeed(href, event) {
let feeds = gBrowser.selectedBrowser.feeds;
try {
openUILink(href, event, { ignoreAlt: true });
} finally {
// We might default to a livebookmarks modal dialog,
// so reset that if the user happens to click it again
gBrowser.selectedBrowser.feeds = feeds;
}
},
get _feedMenuitem() {
delete this._feedMenuitem;
return this._feedMenuitem = document.getElementById("singleFeedMenuitemState");
},
get _feedMenupopup() {
delete this._feedMenupopup;
return this._feedMenupopup = document.getElementById("multipleFeedsMenuState");
},
/**
* Update the browser UI to show whether or not feeds are available when
* a page is loaded or the user switches tabs to a page that has feeds.
*/
updateFeeds() {
if (this._updateFeedTimeout)
clearTimeout(this._updateFeedTimeout);
let feeds = gBrowser.selectedBrowser.feeds;
let haveFeeds = feeds && feeds.length > 0;
let feedButton = document.getElementById("feed-button");
if (feedButton) {
if (haveFeeds) {
feedButton.removeAttribute("disabled");
} else {
feedButton.setAttribute("disabled", "true");
}
}
if (!haveFeeds) {
this._feedMenuitem.setAttribute("disabled", "true");
this._feedMenuitem.removeAttribute("hidden");
this._feedMenupopup.setAttribute("hidden", "true");
return;
}
if (feeds.length > 1) {
this._feedMenuitem.setAttribute("hidden", "true");
this._feedMenupopup.removeAttribute("hidden");
} else {
this._feedMenuitem.setAttribute("feed", feeds[0].href);
this._feedMenuitem.removeAttribute("disabled");
this._feedMenuitem.removeAttribute("hidden");
this._feedMenupopup.setAttribute("hidden", "true");
}
},
addFeed(link, browserForLink) {
if (!browserForLink.feeds)
browserForLink.feeds = [];
browserForLink.feeds.push({ href: link.href, title: link.title });
// If this addition was for the current browser, update the UI. For
// background browsers, we'll update on tab switch.
if (browserForLink == gBrowser.selectedBrowser) {
// Batch updates to avoid updating the UI for multiple onLinkAdded events
// fired within 100ms of each other.
if (this._updateFeedTimeout)
clearTimeout(this._updateFeedTimeout);
this._updateFeedTimeout = setTimeout(this.updateFeeds.bind(this), 100);
}
},
/**
* Get the human-readable display name of a file. This could be the
* application name.
* @param file
* A nsIFile to look up the name of
* @return The display name of the application represented by the file.
*/
_getFileDisplayName(file) {
switch (AppConstants.platform) {
case "win":
if (file instanceof Ci.nsILocalFileWin) {
try {
return file.getVersionInfoField("FileDescription");
} catch (e) {}
}
break;
case "macosx":
if (file instanceof Ci.nsILocalFileMac) {
try {
return file.bundleDisplayName;
} catch (e) {}
}
break;
}
return file.leafName;
},
_chooseClientApp(aTitle, aTypeName, aBrowser) {
const prefName = getPrefAppForType(aTypeName);
let fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
fp.init(window, aTitle, Ci.nsIFilePicker.modeOpen);
fp.appendFilters(Ci.nsIFilePicker.filterApps);
fp.open((aResult) => {
if (aResult == Ci.nsIFilePicker.returnOK) {
let selectedApp = fp.file;
if (selectedApp) {
// XXXben - we need to compare this with the running instance
// executable just don't know how to do that via script
// XXXmano TBD: can probably add this to nsIShellService
let appName = "";
switch (AppConstants.platform) {
case "win":
appName = AppConstants.MOZ_APP_NAME + ".exe";
break;
case "macosx":
appName = AppConstants.MOZ_MACBUNDLE_NAME;
break;
default:
appName = AppConstants.MOZ_APP_NAME + "-bin";
break;
}
if (fp.file.leafName != appName) {
Services.prefs.setComplexValue(prefName, Ci.nsILocalFile, selectedApp);
aBrowser.messageManager.sendAsyncMessage("FeedWriter:SetApplicationLauncherMenuItem",
{ name: this._getFileDisplayName(selectedApp),
type: "SelectedAppMenuItem" });
}
}
}
});
},
executeClientApp(aSpec, aTitle, aSubtitle, aFeedHandler) {
// aFeedHandler is either "default", indicating the system default reader, or a pref-name containing
// an nsILocalFile pointing to the feed handler's executable.
let clientApp = null;
if (aFeedHandler == "default") {
clientApp = Cc["@mozilla.org/browser/shell-service;1"]
.getService(Ci.nsIShellService)
.defaultFeedReader;
} else {
clientApp = Services.prefs.getComplexValue(aFeedHandler, Ci.nsILocalFile);
}
// For the benefit of applications that might know how to deal with more
// URLs than just feeds, send feed: URLs in the following format:
//
// http urls: replace scheme with feed, e.g.
// http://foo.com/index.rdf -> feed://foo.com/index.rdf
// other urls: prepend feed: scheme, e.g.
// https://foo.com/index.rdf -> feed:https://foo.com/index.rdf
let feedURI = NetUtil.newURI(aSpec);
if (feedURI.schemeIs("http")) {
feedURI.scheme = "feed";
aSpec = feedURI.spec;
} else {
aSpec = "feed:" + aSpec;
}
// Retrieving the shell service might fail on some systems, most
// notably systems where GNOME is not installed.
try {
let ss = Cc["@mozilla.org/browser/shell-service;1"]
.getService(Ci.nsIShellService);
ss.openApplicationWithURI(clientApp, aSpec);
} catch (e) {
// If we couldn't use the shell service, fallback to using a
// nsIProcess instance
let p = Cc["@mozilla.org/process/util;1"]
.createInstance(Ci.nsIProcess);
p.init(clientApp);
p.run(false, [aSpec], 1);
}
},
// nsISupports
QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
Ci.nsISupportsWeakReference]),
init() {
window.messageManager.addMessageListener("FeedWriter:ChooseClientApp", this);
window.messageManager.addMessageListener("FeedWriter:GetSubscriptionUI", this);
window.messageManager.addMessageListener("FeedWriter:SetFeedPrefsAndSubscribe", this);
window.messageManager.addMessageListener("FeedWriter:ShownFirstRun", this);
Services.ppmm.addMessageListener("FeedConverter:ExecuteClientApp", this);
const prefs = Services.prefs;
prefs.addObserver(PREF_SELECTED_ACTION, this, true);
prefs.addObserver(PREF_SELECTED_READER, this, true);
prefs.addObserver(PREF_SELECTED_WEB, this, true);
prefs.addObserver(PREF_VIDEO_SELECTED_ACTION, this, true);
prefs.addObserver(PREF_VIDEO_SELECTED_READER, this, true);
prefs.addObserver(PREF_VIDEO_SELECTED_WEB, this, true);
prefs.addObserver(PREF_AUDIO_SELECTED_ACTION, this, true);
prefs.addObserver(PREF_AUDIO_SELECTED_READER, this, true);
prefs.addObserver(PREF_AUDIO_SELECTED_WEB, this, true);
},
uninit() {
Services.ppmm.removeMessageListener("FeedConverter:ExecuteClientApp", this);
this._prefChangeCallback = null;
},
// nsIObserver
observe(subject, topic, data) {
if (topic == "nsPref:changed") {
LOG(`Pref changed ${data}`)
if (this._prefChangeCallback) {
this._prefChangeCallback.disarm();
}
// Multiple prefs are set at the same time, debounce to reduce noise
// This can happen in one feed and we want to message all feed pages
this._prefChangeCallback = new DeferredTask(() => {
this._prefChanged(data);
}, PREF_UPDATE_DELAY);
this._prefChangeCallback.arm();
}
},
_prefChanged(prefName) {
// Don't observe for PREF_*SELECTED_APP as user likely just picked one
// That is also handled by SetApplicationLauncherMenuItem call
// Rather than the others which happen on subscription
switch (prefName) {
case PREF_SELECTED_READER:
case PREF_SELECTED_WEB:
case PREF_VIDEO_SELECTED_READER:
case PREF_VIDEO_SELECTED_WEB:
case PREF_AUDIO_SELECTED_READER:
case PREF_AUDIO_SELECTED_WEB:
case PREF_SELECTED_ACTION:
case PREF_VIDEO_SELECTED_ACTION:
case PREF_AUDIO_SELECTED_ACTION:
const response = {
default: this._getReaderForType(Ci.nsIFeed.TYPE_FEED),
[Ci.nsIFeed.TYPE_AUDIO]: this._getReaderForType(Ci.nsIFeed.TYPE_AUDIO),
[Ci.nsIFeed.TYPE_VIDEO]: this._getReaderForType(Ci.nsIFeed.TYPE_VIDEO)
};
Services.mm.broadcastAsyncMessage("FeedWriter:PreferenceUpdated",
response);
break;
}
},
_initSubscriptionUIResponse(feedType) {
const wccr = Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].
getService(Ci.nsIWebContentConverterService);
const handlersRaw = wccr.getContentHandlers(getMimeTypeForFeedType(feedType));
const handlers = [];
for (let handler of handlersRaw) {
LOG(`Handler found: ${handler}`);
handlers.push({
name: handler.name,
uri: handler.uri
});
}
let showFirstRunUI = true;
// eslint-disable-next-line mozilla/use-default-preference-values
try {
showFirstRunUI = Services.prefs.getBoolPref(PREF_SHOW_FIRST_RUN_UI);
} catch (ex) { }
const response = { handlers, showFirstRunUI };
let selectedClientApp;
const feedTypePref = getPrefAppForType(feedType);
try {
selectedClientApp = Services.prefs.getComplexValue(feedTypePref, Ci.nsILocalFile);
} catch (ex) {
// Just do nothing, then we won't bother populating
}
let defaultClientApp = null;
try {
// This can sometimes not exist
defaultClientApp = Cc["@mozilla.org/browser/shell-service;1"]
.getService(Ci.nsIShellService)
.defaultFeedReader;
} catch (ex) {
// Just do nothing, then we don't bother populating
}
if (selectedClientApp && selectedClientApp.exists()) {
if (defaultClientApp && selectedClientApp.path != defaultClientApp.path) {
// Only set the default menu item if it differs from the selected one
response.defaultMenuItem = this._getFileDisplayName(defaultClientApp);
}
response.selectedMenuItem = this._getFileDisplayName(selectedClientApp);
}
response.reader = this._getReaderForType(feedType);
return response;
},
_setPref(aPrefName, aPrefValue, aIsComplex = false) {
LOG(`FeedWriter._setPref ${aPrefName}`);
// Ensure we have a pref that is settable
if (aPrefName && SETTABLE_PREFS.has(aPrefName)) {
if (aIsComplex) {
Services.prefs.setStringPref(aPrefName, aPrefValue);
} else {
Services.prefs.setCharPref(aPrefName, aPrefValue);
}
} else {
LOG(`FeedWriter._setPref ${aPrefName} not allowed`);
}
},
_getReaderForType(feedType) {
let prefs = Services.prefs;
let handler = "bookmarks";
let url;
// eslint-disable-next-line mozilla/use-default-preference-values
try {
handler = prefs.getCharPref(getPrefReaderForType(feedType));
} catch (ex) { }
if (handler === "web") {
try {
url = prefs.getStringPref(getPrefWebForType(feedType));
} catch (ex) {
LOG("FeedWriter._setSelectedHandler: invalid or no handler in prefs");
url = null;
}
}
const alwaysUse = this._getAlwaysUseState(feedType);
const action = prefs.getCharPref(getPrefActionForType(feedType));
return { handler, url, alwaysUse, action };
},
_getAlwaysUseState(feedType) {
try {
return Services.prefs.getCharPref(getPrefActionForType(feedType)) != "ask";
} catch (ex) { }
return false;
},
receiveMessage(msg) {
let handler;
switch (msg.name) {
case "FeedWriter:GetSubscriptionUI":
const response = this._initSubscriptionUIResponse(msg.data.feedType);
msg.target.messageManager
.sendAsyncMessage("FeedWriter:GetSubscriptionUIResponse",
response);
break;
case "FeedWriter:ChooseClientApp":
this._chooseClientApp(msg.data.title, msg.data.feedType, msg.target);
break;
case "FeedWriter:ShownFirstRun":
Services.prefs.setBoolPref(PREF_SHOW_FIRST_RUN_UI, false);
break;
case "FeedWriter:SetFeedPrefsAndSubscribe":
const settings = msg.data;
if (!settings.action || !VALID_ACTIONS.has(settings.action)) {
LOG(`Invalid action ${settings.action}`);
return;
}
if (!settings.reader || !VALID_READERS.has(settings.reader)) {
LOG(`Invalid reader ${settings.reader}`);
return;
}
const actionPref = getPrefActionForType(settings.feedType);
this._setPref(actionPref, settings.action);
const readerPref = getPrefReaderForType(settings.feedType);
this._setPref(readerPref, settings.reader);
handler = null;
switch (settings.reader) {
case "web":
// This is a web set URI by content using window.registerContentHandler()
// Lets make sure we know about it before setting it
const webPref = getPrefWebForType(settings.feedType);
let wccr = Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].
getService(Ci.nsIWebContentConverterService);
// If the user provided an invalid web URL this function won't give us a reference
handler = wccr.getWebContentHandlerByURI(getMimeTypeForFeedType(settings.feedType), settings.uri);
if (handler) {
this._setPref(webPref, settings.uri, true);
if (settings.useAsDefault) {
wccr.setAutoHandler(getMimeTypeForFeedType(settings.feedType), handler);
}
msg.target.messageManager
.sendAsyncMessage("FeedWriter:SetFeedPrefsAndSubscribeResponse",
{ redirect: handler.getHandlerURI(settings.feedLocation) });
} else {
LOG(`No handler found for web ${settings.feedType} ${settings.uri}`);
}
break;
default:
const feedService = Cc["@mozilla.org/browser/feeds/result-service;1"].
getService(Ci.nsIFeedResultService);
feedService.addToClientReader(settings.feedLocation,
settings.feedTitle,
settings.feedSubtitle,
settings.feedType,
settings.reader);
}
break;
case "FeedConverter:ExecuteClientApp":
// Always check feedHandler is from a set array of executable prefs
if (EXECUTABLE_PREFS.has(msg.data.feedHandler)) {
this.executeClientApp(msg.data.spec, msg.data.title,
msg.data.subtitle, msg.data.feedHandler);
} else {
LOG(`FeedConverter:ExecuteClientApp - Will not exec ${msg.data.feedHandler}`);
}
break;
}
},
};
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