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-# -*- Mode: javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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/.
-
-/**
- * The Feed Handler object manages discovery of RSS/ATOM feeds in web pages
- * and shows UI when they are discovered.
- */
-var FeedHandler = {
-
- /* Pale Moon: Address Bar: Feeds
- * The click handler for the Feed icon in the location bar. Opens the
- * subscription page if user is not given a choice of feeds.
- * (Otherwise the list of available feeds will be presented to the
- * user in a popup menu.)
- */
- onFeedButtonPMClick: function(event) {
- event.stopPropagation();
-
- if (event.target.hasAttribute("feed") &&
- event.eventPhase == Event.AT_TARGET &&
- (event.button == 0 || event.button == 1)) {
- this.subscribeToFeed(null, event);
- }
- },
-
- /**
- * The click handler for the Feed icon in the toolbar. Opens the
- * subscription page if user is not given a choice of feeds.
- * (Otherwise the list of available feeds will be presented to the
- * user in a popup menu.)
- */
- onFeedButtonClick: function(event) {
- event.stopPropagation();
-
- let feeds = gBrowser.selectedBrowser.feeds || [];
- // If there are multiple feeds, the menu will open, so no need to do
- // anything. If there are no feeds, nothing to do either.
- if (feeds.length != 1)
- return;
-
- if (event.eventPhase == Event.AT_TARGET &&
- (event.button == 0 || event.button == 1)) {
- this.subscribeToFeed(feeds[0].href, event);
- }
- },
-
- /** Called when the user clicks on the Subscribe to This Page... menu item.
- * 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 menuPopup
- * The feed list menupopup to be populated.
- * @returns true if the menu 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).
- */
- buildFeedList: function(menuPopup) {
- var feeds = gBrowser.selectedBrowser.feeds;
- if (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.
- menuPopup.parentNode.removeAttribute("open");
- return false;
- }
-
- while (menuPopup.firstChild)
- menuPopup.removeChild(menuPopup.firstChild);
-
- if (feeds.length == 1) {
- var feedButtonPM = document.getElementById("ub-feed-button");
- if (feedButtonPM)
- feedButtonPM.setAttribute("feed", feeds[0].href);
- return false;
- }
-
- if (feeds.length <= 1)
- return false;
-
- // Build the menu showing the available feed choices for viewing.
- for (let feedInfo of feeds) {
- var menuItem = document.createElement("menuitem");
- var baseTitle = feedInfo.title || feedInfo.href;
- var labelStr = gNavigatorBundle.getFormattedString("feedShowFeedNew", [baseTitle]);
- menuItem.setAttribute("class", "feed-menuitem");
- menuItem.setAttribute("label", labelStr);
- menuItem.setAttribute("feed", feedInfo.href);
- menuItem.setAttribute("tooltiptext", feedInfo.href);
- menuItem.setAttribute("crop", "center");
- menuPopup.appendChild(menuItem);
- }
- 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
- * 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: function(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);
- var 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: function(href, event) {
- var 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: function() {
- if (this._updateFeedTimeout)
- clearTimeout(this._updateFeedTimeout);
-
- var feeds = gBrowser.selectedBrowser.feeds;
- var haveFeeds = feeds && feeds.length > 0;
-
- var feedButtonPM = document.getElementById("ub-feed-button");
-
- var feedButton = document.getElementById("feed-button");
-
- if (feedButton)
- feedButton.disabled = !haveFeeds;
-
- if (feedButtonPM) {
- if (!haveFeeds) {
- feedButtonPM.collapsed = true;
- feedButtonPM.removeAttribute("feed");
- } else {
- feedButtonPM.collapsed = !gPrefService.getBoolPref("browser.urlbar.rss");
- }
- }
-
- if (!haveFeeds) {
- this._feedMenuitem.setAttribute("disabled", "true");
- this._feedMenuitem.removeAttribute("hidden");
- this._feedMenupopup.setAttribute("hidden", "true");
- return;
- }
-
- if (feeds.length > 1) {
- if (feedButtonPM)
- feedButtonPM.removeAttribute("feed");
- this._feedMenuitem.setAttribute("hidden", "true");
- this._feedMenupopup.removeAttribute("hidden");
- } else {
- if (feedButtonPM)
- feedButtonPM.setAttribute("feed", feeds[0].href);
- this._feedMenuitem.setAttribute("feed", feeds[0].href);
- this._feedMenuitem.removeAttribute("disabled");
- this._feedMenuitem.removeAttribute("hidden");
- this._feedMenupopup.setAttribute("hidden", "true");
- }
- },
-
- addFeed: function(link, targetDoc) {
- // find which tab this is for, and set the attribute on the browser
- var browserForLink = gBrowser.getBrowserForDocument(targetDoc);
- if (!browserForLink) {
- // ignore feeds loaded in subframes (see bug 305472)
- return;
- }
-
- 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) {
- var feedButtonPM = document.getElementById("ub-feed-button");
- if (feedButtonPM)
- feedButtonPM.collapsed = !gPrefService.getBoolPref("browser.urlbar.rss");
- // 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);
- }
- }
-};
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