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gecko/browser/metro/base/content/browser.js

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// -*- Mode: js2; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
/* 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/. */
let Cc = Components.classes;
let Ci = Components.interfaces;
let Cu = Components.utils;
let Cr = Components.results;
Cu.import("resource://gre/modules/PageThumbs.jsm");
// Page for which the start UI is shown
const kStartURI = "about:newtab";
// allow panning after this timeout on pages with registered touch listeners
const kTouchTimeout = 300;
const kSetInactiveStateTimeout = 100;
const kTabThumbnailDelayCapture = 500;
const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
// See grid.xml, we use this to cache style info across loads of the startui.
var _richgridTileSizes = {};
// Override sizeToContent in the main window. It breaks things (bug 565887)
window.sizeToContent = function() {
Cu.reportError("window.sizeToContent is not allowed in this window");
}
function getTabModalPromptBox(aWindow) {
let browser = Browser.getBrowserForWindow(aWindow);
return Browser.getTabModalPromptBox(browser);
}
/*
* Returns the browser for the currently displayed tab.
*/
function getBrowser() {
return Browser.selectedBrowser;
}
var Browser = {
_debugEvents: false,
_tabs: [],
_selectedTab: null,
_tabId: 0,
windowUtils: window.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils),
get defaultBrowserWidth() {
return window.innerWidth;
},
startup: function startup() {
var self = this;
try {
messageManager.loadFrameScript("chrome://browser/content/Util.js", true);
messageManager.loadFrameScript("chrome://browser/content/contenthandlers/Content.js", true);
messageManager.loadFrameScript("chrome://browser/content/contenthandlers/FormHelper.js", true);
messageManager.loadFrameScript("chrome://browser/content/library/SelectionPrototype.js", true);
messageManager.loadFrameScript("chrome://browser/content/contenthandlers/SelectionHandler.js", true);
messageManager.loadFrameScript("chrome://browser/content/contenthandlers/ContextMenuHandler.js", true);
messageManager.loadFrameScript("chrome://browser/content/contenthandlers/ConsoleAPIObserver.js", true);
} catch (e) {
// XXX whatever is calling startup needs to dump errors!
dump("###########" + e + "\n");
}
if (!Services.metro) {
// Services.metro is only available on Windows Metro. We want to be able
// to test metro on other platforms, too, so we provide a minimal shim.
Services.metro = {
activationURI: "",
pinTileAsync: function () {},
unpinTileAsync: function () {}
};
}
/* handles dispatching clicks on browser into clicks in content or zooms */
Elements.browsers.customDragger = new Browser.MainDragger();
/* handles web progress management for open browsers */
Elements.browsers.webProgress = WebProgress.init();
// Call InputSourceHelper first so global listeners get called before
// we start processing input in TouchModule.
InputSourceHelper.init();
ClickEventHandler.init();
TouchModule.init();
GestureModule.init();
BrowserTouchHandler.init();
PopupBlockerObserver.init();
APZCObserver.init();
// Init the touch scrollbox
this.contentScrollbox = Elements.browsers;
this.contentScrollboxScroller = {
scrollBy: function(aDx, aDy) {
let view = getBrowser().getRootView();
view.scrollBy(aDx, aDy);
},
scrollTo: function(aX, aY) {
let view = getBrowser().getRootView();
view.scrollTo(aX, aY);
},
getPosition: function(aScrollX, aScrollY) {
let view = getBrowser().getRootView();
let scroll = view.getPosition();
aScrollX.value = scroll.x;
aScrollY.value = scroll.y;
}
};
ContentAreaObserver.init();
function fullscreenHandler() {
if (Browser.selectedBrowser.contentWindow.document.mozFullScreenElement)
Elements.stack.setAttribute("fullscreen", "true");
else
Elements.stack.removeAttribute("fullscreen");
}
window.addEventListener("mozfullscreenchange", fullscreenHandler, true);
BrowserUI.init();
window.controllers.appendController(this);
window.controllers.appendController(BrowserUI);
Services.obs.addObserver(SessionHistoryObserver, "browser:purge-session-history", false);
window.QueryInterface(Ci.nsIDOMChromeWindow).browserDOMWindow = new nsBrowserAccess();
Elements.browsers.addEventListener("DOMUpdatePageReport", PopupBlockerObserver.onUpdatePageReport, false);
// Make sure we're online before attempting to load
Util.forceOnline();
// If this is an intial window launch the commandline handler passes us the default
// page as an argument.
let commandURL = null;
try {
let argsObj = window.arguments[0].wrappedJSObject;
if (argsObj && argsObj.pageloadURL) {
// Talos tp-cmdline parameter
commandURL = argsObj.pageloadURL;
} else if (window.arguments && window.arguments[0]) {
// BrowserCLH paramerter
commandURL = window.arguments[0];
}
} catch (ex) {
Util.dumpLn(ex);
}
messageManager.addMessageListener("DOMLinkAdded", this);
messageManager.addMessageListener("Browser:FormSubmit", this);
messageManager.addMessageListener("Browser:CanUnload:Return", this);
messageManager.addMessageListener("scroll", this);
messageManager.addMessageListener("Browser:CertException", this);
messageManager.addMessageListener("Browser:BlockedSite", this);
messageManager.addMessageListener("Browser:TapOnSelection", this);
Task.spawn(function() {
// Activation URIs come from protocol activations, secondary tiles, and file activations
let activationURI = yield this.getShortcutOrURI(Services.metro.activationURI);
let self = this;
function loadStartupURI() {
if (activationURI) {
let webNav = Ci.nsIWebNavigation;
let flags = webNav.LOAD_FLAGS_ALLOW_THIRD_PARTY_FIXUP |
webNav.LOAD_FLAGS_FIXUP_SCHEME_TYPOS;
self.addTab(activationURI, true, null, { flags: flags });
} else {
let uri = commandURL || Browser.getHomePage();
self.addTab(uri, true);
}
}
// Should we restore the previous session (crash or some other event)
let ss = Cc["@mozilla.org/browser/sessionstore;1"]
.getService(Ci.nsISessionStore);
let shouldRestore = ss.shouldRestore();
if (shouldRestore) {
let bringFront = false;
// First open any commandline URLs, except the homepage
if (activationURI && activationURI != kStartURI) {
this.addTab(activationURI, true, null, { flags: Ci.nsIWebNavigation.LOAD_FLAGS_ALLOW_THIRD_PARTY_FIXUP });
} else if (commandURL && commandURL != kStartURI) {
this.addTab(commandURL, true);
} else {
bringFront = true;
// Initial window resizes call functions that assume a tab is in the tab list
// and restored tabs are added too late. We add a dummy to to satisfy the resize
// code and then remove the dummy after the session has been restored.
let dummy = this.addTab("about:blank", true);
let dummyCleanup = {
observe: function(aSubject, aTopic, aData) {
Services.obs.removeObserver(dummyCleanup, "sessionstore-windows-restored");
if (aData == "fail")
loadStartupURI();
dummy.chromeTab.ignoreUndo = true;
Browser.closeTab(dummy, { forceClose: true });
}
};
Services.obs.addObserver(dummyCleanup, "sessionstore-windows-restored", false);
}
ss.restoreLastSession(bringFront);
} else {
loadStartupURI();
}
// Notify about our input type
InputSourceHelper.fireUpdate();
// Broadcast a UIReady message so add-ons know we are finished with startup
let event = document.createEvent("Events");
event.initEvent("UIReady", true, false);
window.dispatchEvent(event);
}.bind(this));
},
shutdown: function shutdown() {
APZCObserver.shutdown();
BrowserUI.uninit();
ClickEventHandler.uninit();
ContentAreaObserver.shutdown();
Appbar.shutdown();
messageManager.removeMessageListener("Browser:FormSubmit", this);
messageManager.removeMessageListener("scroll", this);
messageManager.removeMessageListener("Browser:CertException", this);
messageManager.removeMessageListener("Browser:BlockedSite", this);
messageManager.removeMessageListener("Browser:TapOnSelection", this);
Services.obs.removeObserver(SessionHistoryObserver, "browser:purge-session-history");
window.controllers.removeController(this);
window.controllers.removeController(BrowserUI);
},
getHomePage: function getHomePage(aOptions) {
aOptions = aOptions || { useDefault: false };
let url = kStartURI;
try {
let prefs = aOptions.useDefault ? Services.prefs.getDefaultBranch(null) : Services.prefs;
url = prefs.getComplexValue("browser.startup.homepage", Ci.nsIPrefLocalizedString).data;
}
catch(e) { }
return url;
},
get browsers() {
return this._tabs.map(function(tab) { return tab.browser; });
},
/**
* Load a URI in the current tab, or a new tab if necessary.
* @param aURI String
* @param aParams Object with optional properties that will be passed to loadURIWithFlags:
* flags, referrerURI, charset, postData.
*/
loadURI: function loadURI(aURI, aParams) {
let browser = this.selectedBrowser;
// We need to keep about: pages opening in new "local" tabs. We also want to spawn
// new "remote" tabs if opening web pages from a "local" about: page.
dump("loadURI=" + aURI + "\ncurrentURI=" + browser.currentURI.spec + "\n");
let params = aParams || {};
try {
let flags = params.flags || Ci.nsIWebNavigation.LOAD_FLAGS_NONE;
let postData = ("postData" in params && params.postData) ? params.postData.value : null;
let referrerURI = "referrerURI" in params ? params.referrerURI : null;
let charset = "charset" in params ? params.charset : null;
dump("loading tab: " + aURI + "\n");
browser.loadURIWithFlags(aURI, flags, referrerURI, charset, postData);
} catch(e) {
dump("Error: " + e + "\n");
}
},
/**
* Determine if the given URL is a shortcut/keyword and, if so, expand it
* @param aURL String
* @param aPostDataRef Out param contains any required post data for a search
* @return {Promise}
* @result the expanded shortcut, or the original URL if not a shortcut
*/
getShortcutOrURI: function getShortcutOrURI(aURL, aPostDataRef) {
return Task.spawn(function() {
if (!aURL)
throw new Task.Result(aURL);
let shortcutURL = null;
let keyword = aURL;
let param = "";
let offset = aURL.indexOf(" ");
if (offset > 0) {
keyword = aURL.substr(0, offset);
param = aURL.substr(offset + 1);
}
if (!aPostDataRef)
aPostDataRef = {};
let engine = Services.search.getEngineByAlias(keyword);
if (engine) {
let submission = engine.getSubmission(param);
aPostDataRef.value = submission.postData;
throw new Task.Result(submission.uri.spec);
}
try {
[shortcutURL, aPostDataRef.value] = PlacesUtils.getURLAndPostDataForKeyword(keyword);
} catch (e) {}
if (!shortcutURL)
throw new Task.Result(aURL);
let postData = "";
if (aPostDataRef.value)
postData = unescape(aPostDataRef.value);
if (/%s/i.test(shortcutURL) || /%s/i.test(postData)) {
let charset = "";
const re = /^(.*)\&mozcharset=([a-zA-Z][_\-a-zA-Z0-9]+)\s*$/;
let matches = shortcutURL.match(re);
if (matches)
[, shortcutURL, charset] = matches;
else {
// Try to get the saved character-set.
try {
// makeURI throws if URI is invalid.
// Will return an empty string if character-set is not found.
charset = yield PlacesUtils.getCharsetForURI(Util.makeURI(shortcutURL));
} catch (e) { dump("--- error " + e + "\n"); }
}
let encodedParam = "";
if (charset)
encodedParam = escape(convertFromUnicode(charset, param));
else // Default charset is UTF-8
encodedParam = encodeURIComponent(param);
shortcutURL = shortcutURL.replace(/%s/g, encodedParam).replace(/%S/g, param);
if (/%s/i.test(postData)) // POST keyword
aPostDataRef.value = getPostDataStream(postData, param, encodedParam, "application/x-www-form-urlencoded");
} else if (param) {
// This keyword doesn't take a parameter, but one was provided. Just return
// the original URL.
aPostDataRef.value = null;
throw new Task.Result(aURL);
}
throw new Task.Result(shortcutURL);
});
},
/**
* Return the currently active <browser> object
*/
get selectedBrowser() {
return (this._selectedTab && this._selectedTab.browser);
},
get tabs() {
return this._tabs;
},
getTabModalPromptBox: function(aBrowser) {
let browser = (aBrowser || getBrowser());
let stack = browser.parentNode;
let self = this;
let promptBox = {
appendPrompt : function(args, onCloseCallback) {
let newPrompt = document.createElementNS(XUL_NS, "tabmodalprompt");
newPrompt.setAttribute("promptType", args.promptType);
stack.appendChild(newPrompt);
browser.setAttribute("tabmodalPromptShowing", true);
newPrompt.clientTop; // style flush to assure binding is attached
let tab = self.getTabForBrowser(browser);
tab = tab.chromeTab;
newPrompt.metroInit(args, tab, onCloseCallback);
return newPrompt;
},
removePrompt : function(aPrompt) {
stack.removeChild(aPrompt);
let prompts = this.listPrompts();
if (prompts.length) {
let prompt = prompts[prompts.length - 1];
prompt.Dialog.setDefaultFocus();
} else {
browser.removeAttribute("tabmodalPromptShowing");
browser.focus();
}
},
listPrompts : function(aPrompt) {
let els = stack.getElementsByTagNameNS(XUL_NS, "tabmodalprompt");
// NodeList --> real JS array
let prompts = Array.slice(els);
return prompts;
},
};
return promptBox;
},
getBrowserForWindowId: function getBrowserForWindowId(aWindowId) {
for (let i = 0; i < this.browsers.length; i++) {
if (this.browsers[i].contentWindowId == aWindowId)
return this.browsers[i];
}
return null;
},
getBrowserForWindow: function(aWindow) {
let windowID = aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils).currentInnerWindowID;
return this.getBrowserForWindowId(windowID);
},
getTabForBrowser: function getTabForBrowser(aBrowser) {
let tabs = this._tabs;
for (let i = 0; i < tabs.length; i++) {
if (tabs[i].browser == aBrowser)
return tabs[i];
}
return null;
},
getTabAtIndex: function getTabAtIndex(index) {
if (index >= this._tabs.length || index < 0)
return null;
return this._tabs[index];
},
getTabFromChrome: function getTabFromChrome(chromeTab) {
for (var t = 0; t < this._tabs.length; t++) {
if (this._tabs[t].chromeTab == chromeTab)
return this._tabs[t];
}
return null;
},
createTabId: function createTabId() {
return this._tabId++;
},
/**
* Create a new tab and add it to the tab list.
*
* If you are opening a new foreground tab in response to a user action, use
* BrowserUI.addAndShowTab which will also show the tab strip.
*
* @param aURI String specifying the URL to load.
* @param aBringFront Boolean (optional) Open the new tab in the foreground?
* @param aOwner Tab object (optional) The "parent" of the new tab.
* This is the tab responsible for opening the new tab. When the new tab
* is closed, we will return to a parent or "sibling" tab if possible.
* @param aParams Object (optional) with optional properties:
* index: Number specifying where in the tab list to insert the new tab.
* private: If true, the new tab should be have Private Browsing active.
* flags, postData, charset, referrerURI: See loadURIWithFlags.
*/
addTab: function browser_addTab(aURI, aBringFront, aOwner, aParams) {
let params = aParams || {};
if (aOwner && !('index' in params)) {
// Position the new tab to the right of its owner...
params.index = this._tabs.indexOf(aOwner) + 1;
// ...and to the right of any siblings.
while (this._tabs[params.index] && this._tabs[params.index].owner == aOwner) {
params.index++;
}
}
let newTab = new Tab(aURI, params, aOwner);
if (params.index >= 0) {
this._tabs.splice(params.index, 0, newTab);
} else {
this._tabs.push(newTab);
}
if (aBringFront)
this.selectedTab = newTab;
this._announceNewTab(newTab);
return newTab;
},
closeTab: function closeTab(aTab, aOptions) {
let tab = aTab instanceof XULElement ? this.getTabFromChrome(aTab) : aTab;
if (!tab) {
return;
}
if (aOptions && "forceClose" in aOptions && aOptions.forceClose) {
this._doCloseTab(tab);
return;
}
tab.browser.messageManager.sendAsyncMessage("Browser:CanUnload", {});
},
savePage: function() {
ContentAreaUtils.saveDocument(this.selectedBrowser.contentWindow.document);
},
/*
* helper for addTab related methods. Fires events related to
* new tab creation.
*/
_announceNewTab: function (aTab) {
let event = document.createEvent("UIEvents");
event.initUIEvent("TabOpen", true, false, window, 0);
aTab.chromeTab.dispatchEvent(event);
aTab.browser.messageManager.sendAsyncMessage("Browser:TabOpen");
},
_doCloseTab: function _doCloseTab(aTab) {
if (this._tabs.length === 1) {
Browser.addTab(this.getHomePage());
}
let nextTab = this.getNextTab(aTab);
// Tabs owned by the closed tab are now orphaned.
this._tabs.forEach(function(item, index, array) {
if (item.owner == aTab)
item.owner = null;
});
// tray tab
let event = document.createEvent("Events");
event.initEvent("TabClose", true, false);
aTab.chromeTab.dispatchEvent(event);
// tab window
event = document.createEvent("Events");
event.initEvent("TabClose", true, false);
aTab.browser.contentWindow.dispatchEvent(event);
aTab.browser.messageManager.sendAsyncMessage("Browser:TabClose");
let container = aTab.chromeTab.parentNode;
aTab.destroy();
this._tabs.splice(this._tabs.indexOf(aTab), 1);
this.selectedTab = nextTab;
event = document.createEvent("Events");
event.initEvent("TabRemove", true, false);
container.dispatchEvent(event);
},
getNextTab: function getNextTab(aTab) {
let tabIndex = this._tabs.indexOf(aTab);
if (tabIndex == -1)
return null;
if (this._selectedTab == aTab || this._selectedTab.chromeTab.hasAttribute("closing")) {
let nextTabIndex = tabIndex + 1;
let nextTab = null;
while (nextTabIndex < this._tabs.length && (!nextTab || nextTab.chromeTab.hasAttribute("closing"))) {
nextTab = this.getTabAtIndex(nextTabIndex);
nextTabIndex++;
}
nextTabIndex = tabIndex - 1;
while (nextTabIndex >= 0 && (!nextTab || nextTab.chromeTab.hasAttribute("closing"))) {
nextTab = this.getTabAtIndex(nextTabIndex);
nextTabIndex--;
}
if (!nextTab || nextTab.chromeTab.hasAttribute("closing"))
return null;
// If the next tab is not a sibling, switch back to the parent.
if (aTab.owner && nextTab.owner != aTab.owner)
nextTab = aTab.owner;
if (!nextTab)
return null;
return nextTab;
}
return this._selectedTab;
},
get selectedTab() {
return this._selectedTab;
},
set selectedTab(tab) {
if (tab instanceof XULElement)
tab = this.getTabFromChrome(tab);
if (!tab)
return;
if (this._selectedTab == tab) {
// Deck does not update its selectedIndex when children
// are removed. See bug 602708
Elements.browsers.selectedPanel = tab.notification;
return;
}
let isFirstTab = this._selectedTab == null;
let lastTab = this._selectedTab;
let browser = tab.browser;
this._selectedTab = tab;
if (lastTab)
lastTab.active = false;
if (tab)
tab.active = true;
BrowserUI.update();
if (isFirstTab) {
BrowserUI._titleChanged(browser);
} else {
// Update all of our UI to reflect the new tab's location
BrowserUI.updateURI();
let event = document.createEvent("Events");
event.initEvent("TabSelect", true, false);
event.lastTab = lastTab;
tab.chromeTab.dispatchEvent(event);
}
tab.lastSelected = Date.now();
},
supportsCommand: function(cmd) {
return false;
},
isCommandEnabled: function(cmd) {
return false;
},
doCommand: function(cmd) {
},
getNotificationBox: function getNotificationBox(aBrowser) {
let browser = aBrowser || this.selectedBrowser;
return browser.parentNode.parentNode;
},
/**
* Handle cert exception message from content.
*/
_handleCertException: function _handleCertException(aMessage) {
let json = aMessage.json;
if (json.action == "leave") {
// Get the start page from the *default* pref branch, not the user's
let url = Browser.getHomePage({ useDefault: true });
this.loadURI(url);
} else {
// Handle setting an cert exception and reloading the page
try {
// Add a new SSL exception for this URL
let uri = Services.io.newURI(json.url, null, null);
let sslExceptions = new SSLExceptions();
if (json.action == "permanent")
sslExceptions.addPermanentException(uri, window);
else
sslExceptions.addTemporaryException(uri, window);
} catch (e) {
dump("EXCEPTION handle content command: " + e + "\n" );
}
// Automatically reload after the exception was added
aMessage.target.reload();
}
},
/**
* Handle blocked site message from content.
*/
_handleBlockedSite: function _handleBlockedSite(aMessage) {
let formatter = Cc["@mozilla.org/toolkit/URLFormatterService;1"].getService(Ci.nsIURLFormatter);
let json = aMessage.json;
switch (json.action) {
case "leave": {
// Get the start page from the *default* pref branch, not the user's
let url = Browser.getHomePage({ useDefault: true });
this.loadURI(url);
break;
}
case "report-malware": {
// Get the stop badware "why is this blocked" report url, append the current url, and go there.
try {
let reportURL = formatter.formatURLPref("browser.safebrowsing.malware.reportURL");
reportURL += json.url;
this.loadURI(reportURL);
} catch (e) {
Cu.reportError("Couldn't get malware report URL: " + e);
}
break;
}
case "report-phishing": {
// It's a phishing site, just link to the generic information page
let url = Services.urlFormatter.formatURLPref("app.support.baseURL");
this.loadURI(url + "phishing-malware");
break;
}
}
},
pinSite: function browser_pinSite() {
// Get a path to our app tile
var file = Components.classes["@mozilla.org/file/directory_service;1"].
getService(Components.interfaces.nsIProperties).
get("CurProcD", Components.interfaces.nsIFile);
// Get rid of the current working directory's metro subidr
file = file.parent;
file.append("tileresources");
file.append("VisualElements_logo.png");
var ios = Components.classes["@mozilla.org/network/io-service;1"].
getService(Components.interfaces.nsIIOService);
var uriSpec = ios.newFileURI(file).spec;
Services.metro.pinTileAsync(this._currentPageTileID,
Browser.selectedBrowser.contentTitle, // short name
Browser.selectedBrowser.contentTitle, // display name
"-url " + Browser.selectedBrowser.currentURI.spec,
uriSpec, uriSpec);
},
get _currentPageTileID() {
// We use a unique ID per URL, so just use an MD5 hash of the URL as the ID.
let hasher = Cc["@mozilla.org/security/hash;1"].
createInstance(Ci.nsICryptoHash);
hasher.init(Ci.nsICryptoHash.MD5);
let stringStream = Cc["@mozilla.org/io/string-input-stream;1"].
createInstance(Ci.nsIStringInputStream);
stringStream.data = Browser.selectedBrowser.currentURI.spec;
hasher.updateFromStream(stringStream, -1);
let hashASCII = hasher.finish(true);
// Replace '/' with a valid filesystem character
return ("FFTileID_" + hashASCII).replace('/', '_', 'g');
},
unpinSite: function browser_unpinSite() {
if (!Services.metro.immersive)
return;
Services.metro.unpinTileAsync(this._currentPageTileID);
},
isSitePinned: function browser_isSitePinned() {
if (!Services.metro.immersive)
return false;
return Services.metro.isTilePinned(this._currentPageTileID);
},
starSite: function browser_starSite(callback) {
let uri = this.selectedBrowser.currentURI;
let title = this.selectedBrowser.contentTitle;
Bookmarks.addForURI(uri, title, callback);
},
unstarSite: function browser_unstarSite(callback) {
let uri = this.selectedBrowser.currentURI;
Bookmarks.removeForURI(uri, callback);
},
isSiteStarredAsync: function browser_isSiteStarredAsync(callback) {
let uri = this.selectedBrowser.currentURI;
Bookmarks.isURIBookmarked(uri, callback);
},
/**
* Convenience function for getting the scrollbox position off of a
* scrollBoxObject interface. Returns the actual values instead of the
* wrapping objects.
*
* @param scroller a scrollBoxObject on which to call scroller.getPosition()
*/
getScrollboxPosition: function getScrollboxPosition(scroller) {
let x = {};
let y = {};
scroller.getPosition(x, y);
return new Point(x.value, y.value);
},
forceChromeReflow: function forceChromeReflow() {
let dummy = getComputedStyle(document.documentElement, "").width;
},
receiveMessage: function receiveMessage(aMessage) {
let json = aMessage.json;
let browser = aMessage.target;
switch (aMessage.name) {
case "DOMLinkAdded": {
// checks for an icon to use for a web app
// apple-touch-icon size is 57px and default size is 16px
let rel = json.rel.toLowerCase().split(" ");
if (rel.indexOf("icon") != -1) {
// We use the sizes attribute if available
// see http://www.whatwg.org/specs/web-apps/current-work/multipage/links.html#rel-icon
let size = 16;
if (json.sizes) {
let sizes = json.sizes.toLowerCase().split(" ");
sizes.forEach(function(item) {
if (item != "any") {
let [w, h] = item.split("x");
size = Math.max(Math.min(w, h), size);
}
});
}
if (size > browser.appIcon.size) {
browser.appIcon.href = json.href;
browser.appIcon.size = size;
}
}
else if ((rel.indexOf("apple-touch-icon") != -1) && (browser.appIcon.size < 57)) {
// XXX should we support apple-touch-icon-precomposed ?
// see http://developer.apple.com/safari/library/documentation/appleapplications/reference/safariwebcontent/configuringwebapplications/configuringwebapplications.html
browser.appIcon.href = json.href;
browser.appIcon.size = 57;
}
break;
}
case "Browser:FormSubmit":
browser.lastLocation = null;
break;
case "Browser:CanUnload:Return": {
if (json.permit) {
let tab = this.getTabForBrowser(browser);
BrowserUI.animateClosingTab(tab);
}
break;
}
case "Browser:CertException":
this._handleCertException(aMessage);
break;
case "Browser:BlockedSite":
this._handleBlockedSite(aMessage);
break;
case "Browser:TapOnSelection":
if (!InputSourceHelper.isPrecise) {
if (SelectionHelperUI.isActive) {
SelectionHelperUI.shutdown();
}
if (SelectionHelperUI.canHandle(aMessage)) {
SelectionHelperUI.openEditSession(aMessage);
}
}
break;
}
},
};
Browser.MainDragger = function MainDragger() {
this._horizontalScrollbar = document.getElementById("horizontal-scroller");
this._verticalScrollbar = document.getElementById("vertical-scroller");
this._scrollScales = { x: 0, y: 0 };
Elements.browsers.addEventListener("PanBegin", this, false);
Elements.browsers.addEventListener("PanFinished", this, false);
};
Browser.MainDragger.prototype = {
isDraggable: function isDraggable(target, scroller) {
return { x: true, y: true };
},
dragStart: function dragStart(clientX, clientY, target, scroller) {
let browser = getBrowser();
let bcr = browser.getBoundingClientRect();
this._contentView = browser.getViewAt(clientX - bcr.left, clientY - bcr.top);
},
dragStop: function dragStop(dx, dy, scroller) {
if (this._contentView && this._contentView._updateCacheViewport)
this._contentView._updateCacheViewport();
this._contentView = null;
},
dragMove: function dragMove(dx, dy, scroller, aIsKinetic) {
let doffset = new Point(dx, dy);
this._panContent(doffset);
if (aIsKinetic && doffset.x != 0)
return false;
this._updateScrollbars();
return !doffset.equals(dx, dy);
},
handleEvent: function handleEvent(aEvent) {
let browser = getBrowser();
switch (aEvent.type) {
case "PanBegin": {
let width = ContentAreaObserver.width, height = ContentAreaObserver.height;
let contentWidth = browser.contentDocumentWidth * browser.scale;
let contentHeight = browser.contentDocumentHeight * browser.scale;
// Allow a small margin on both sides to prevent adding scrollbars
// on small viewport approximation
const ALLOWED_MARGIN = 5;
const SCROLL_CORNER_SIZE = 8;
this._scrollScales = {
x: (width + ALLOWED_MARGIN) < contentWidth ? (width - SCROLL_CORNER_SIZE) / contentWidth : 0,
y: (height + ALLOWED_MARGIN) < contentHeight ? (height - SCROLL_CORNER_SIZE) / contentHeight : 0
}
this._showScrollbars();
break;
}
case "PanFinished":
this._hideScrollbars();
// Update the scroll position of the content
browser._updateCSSViewport();
break;
}
},
_panContent: function md_panContent(aOffset) {
if (this._contentView && !this._contentView.isRoot()) {
this._panContentView(this._contentView, aOffset);
// XXX we may need to have "escape borders" for iframe panning
// XXX does not deal with scrollables within scrollables
}
// Do content panning
this._panContentView(getBrowser().getRootView(), aOffset);
},
/** Pan scroller by the given amount. Updates doffset with leftovers. */
_panContentView: function _panContentView(contentView, doffset) {
let pos0 = contentView.getPosition();
contentView.scrollBy(doffset.x, doffset.y);
let pos1 = contentView.getPosition();
doffset.subtract(pos1.x - pos0.x, pos1.y - pos0.y);
},
_updateScrollbars: function _updateScrollbars() {
let scaleX = this._scrollScales.x, scaleY = this._scrollScales.y;
let contentScroll = Browser.getScrollboxPosition(Browser.contentScrollboxScroller);
if (scaleX)
this._horizontalScrollbar.style.MozTransform =
"translateX(" + Math.round(contentScroll.x * scaleX) + "px)";
if (scaleY) {
let y = Math.round(contentScroll.y * scaleY);
let x = 0;
this._verticalScrollbar.style.MozTransform =
"translate(" + x + "px," + y + "px)";
}
},
_showScrollbars: function _showScrollbars() {
this._updateScrollbars();
let scaleX = this._scrollScales.x, scaleY = this._scrollScales.y;
if (scaleX) {
this._horizontalScrollbar.width = ContentAreaObserver.width * scaleX;
this._horizontalScrollbar.setAttribute("panning", "true");
}
if (scaleY) {
this._verticalScrollbar.height = ContentAreaObserver.height * scaleY;
this._verticalScrollbar.setAttribute("panning", "true");
}
},
_hideScrollbars: function _hideScrollbars() {
this._scrollScales.x = 0;
this._scrollScales.y = 0;
this._horizontalScrollbar.removeAttribute("panning");
this._verticalScrollbar.removeAttribute("panning");
this._horizontalScrollbar.removeAttribute("width");
this._verticalScrollbar.removeAttribute("height");
this._horizontalScrollbar.style.MozTransform = "";
this._verticalScrollbar.style.MozTransform = "";
}
};
function nsBrowserAccess() { }
nsBrowserAccess.prototype = {
QueryInterface: function(aIID) {
if (aIID.equals(Ci.nsIBrowserDOMWindow) || aIID.equals(Ci.nsISupports))
return this;
throw Cr.NS_NOINTERFACE;
},
_getOpenAction: function _getOpenAction(aURI, aOpener, aWhere, aContext) {
let where = aWhere;
/*
* aWhere:
* OPEN_DEFAULTWINDOW: default action
* OPEN_CURRENTWINDOW: current window/tab
* OPEN_NEWWINDOW: not allowed, converted to newtab below
* OPEN_NEWTAB: open a new tab
* OPEN_SWITCHTAB: open in an existing tab if it matches, otherwise open
* a new tab. afaict we always open these in the current tab.
*/
if (where == Ci.nsIBrowserDOMWindow.OPEN_DEFAULTWINDOW) {
// query standard browser prefs indicating what to do for default action
switch (aContext) {
// indicates this is an open request from a 3rd party app.
case Ci.nsIBrowserDOMWindow.OPEN_EXTERNAL :
where = Services.prefs.getIntPref("browser.link.open_external");
break;
// internal request
default :
where = Services.prefs.getIntPref("browser.link.open_newwindow");
}
}
if (where == Ci.nsIBrowserDOMWindow.OPEN_NEWWINDOW) {
Util.dumpLn("Invalid request - we can't open links in new windows.");
where = Ci.nsIBrowserDOMWindow.OPEN_NEWTAB;
}
return where;
},
_getBrowser: function _getBrowser(aURI, aOpener, aWhere, aContext) {
let isExternal = (aContext == Ci.nsIBrowserDOMWindow.OPEN_EXTERNAL);
// We don't allow externals apps opening chrome docs
if (isExternal && aURI && aURI.schemeIs("chrome"))
return null;
let location;
let browser;
let loadflags = isExternal ?
Ci.nsIWebNavigation.LOAD_FLAGS_FROM_EXTERNAL :
Ci.nsIWebNavigation.LOAD_FLAGS_NONE;
let openAction = this._getOpenAction(aURI, aOpener, aWhere, aContext);
if (openAction == Ci.nsIBrowserDOMWindow.OPEN_NEWTAB) {
let owner = isExternal ? null : Browser.selectedTab;
let tab = BrowserUI.openLinkInNewTab("about:blank", true, owner);
browser = tab.browser;
} else {
browser = Browser.selectedBrowser;
}
try {
let referrer;
if (aURI && browser) {
if (aOpener) {
location = aOpener.location;
referrer = Services.io.newURI(location, null, null);
}
browser.loadURIWithFlags(aURI.spec, loadflags, referrer, null, null);
}
browser.focus();
} catch(e) { }
return browser;
},
openURI: function browser_openURI(aURI, aOpener, aWhere, aContext) {
let browser = this._getBrowser(aURI, aOpener, aWhere, aContext);
return browser ? browser.contentWindow : null;
},
openURIInFrame: function browser_openURIInFrame(aURI, aOpener, aWhere, aContext) {
let browser = this._getBrowser(aURI, aOpener, aWhere, aContext);
return browser ? browser.QueryInterface(Ci.nsIFrameLoaderOwner) : null;
},
isTabContentWindow: function(aWindow) {
return Browser.browsers.some(function (browser) browser.contentWindow == aWindow);
},
get contentWindow() {
return Browser.selectedBrowser.contentWindow;
}
};
/**
* Handler for blocked popups, triggered by DOMUpdatePageReport events in browser.xml
*/
var PopupBlockerObserver = {
init: function init() {
Elements.browsers.addEventListener("mousedown", this, true);
},
handleEvent: function handleEvent(aEvent) {
switch (aEvent.type) {
case "mousedown":
let box = Browser.getNotificationBox();
let notification = box.getNotificationWithValue("popup-blocked");
if (notification && !notification.contains(aEvent.target))
box.removeNotification(notification);
break;
}
},
onUpdatePageReport: function onUpdatePageReport(aEvent) {
var cBrowser = Browser.selectedBrowser;
if (aEvent.originalTarget != cBrowser)
return;
if (!cBrowser.pageReport)
return;
let result = Services.perms.testExactPermission(Browser.selectedBrowser.currentURI, "popup");
if (result == Ci.nsIPermissionManager.DENY_ACTION)
return;
// Only show the notification again if we've not already shown it. Since
// notifications are per-browser, we don't need to worry about re-adding
// it.
if (!cBrowser.pageReport.reported) {
if (Services.prefs.getBoolPref("privacy.popups.showBrowserMessage")) {
var brandShortName = Strings.brand.GetStringFromName("brandShortName");
var popupCount = cBrowser.pageReport.length;
let strings = Strings.browser;
let message = PluralForm.get(popupCount, strings.GetStringFromName("popupWarning.message"))
.replace("#1", brandShortName)
.replace("#2", popupCount);
var notificationBox = Browser.getNotificationBox();
var notification = notificationBox.getNotificationWithValue("popup-blocked");
if (notification) {
notification.label = message;
}
else {
var buttons = [
{
isDefault: false,
label: strings.GetStringFromName("popupButtonAllowOnce2"),
accessKey: "",
callback: function() { PopupBlockerObserver.showPopupsForSite(); }
},
{
label: strings.GetStringFromName("popupButtonAlwaysAllow3"),
accessKey: "",
callback: function() { PopupBlockerObserver.allowPopupsForSite(true); }
},
{
label: strings.GetStringFromName("popupButtonNeverWarn3"),
accessKey: "",
callback: function() { PopupBlockerObserver.allowPopupsForSite(false); }
}
];
const priority = notificationBox.PRIORITY_WARNING_MEDIUM;
notificationBox.appendNotification(message, "popup-blocked",
"chrome://browser/skin/images/infobar-popup.png",
priority, buttons);
}
}
// Record the fact that we've reported this blocked popup, so we don't
// show it again.
cBrowser.pageReport.reported = true;
}
},
allowPopupsForSite: function allowPopupsForSite(aAllow) {
var currentURI = Browser.selectedBrowser.currentURI;
Services.perms.add(currentURI, "popup", aAllow
? Ci.nsIPermissionManager.ALLOW_ACTION
: Ci.nsIPermissionManager.DENY_ACTION);
Browser.getNotificationBox().removeCurrentNotification();
},
showPopupsForSite: function showPopupsForSite() {
let uri = Browser.selectedBrowser.currentURI;
let pageReport = Browser.selectedBrowser.pageReport;
if (pageReport) {
for (let i = 0; i < pageReport.length; ++i) {
var popupURIspec = pageReport[i].popupWindowURI.spec;
// Sometimes the popup URI that we get back from the pageReport
// isn't useful (for instance, netscape.com's popup URI ends up
// being "http://www.netscape.com", which isn't really the URI of
// the popup they're trying to show). This isn't going to be
// useful to the user, so we won't create a menu item for it.
if (popupURIspec == "" || !Util.isURLMemorable(popupURIspec) || popupURIspec == uri.spec)
continue;
let popupFeatures = pageReport[i].popupWindowFeatures;
let popupName = pageReport[i].popupWindowName;
Browser.addTab(popupURIspec, false, Browser.selectedTab);
}
}
}
};
var SessionHistoryObserver = {
observe: function sho_observe(aSubject, aTopic, aData) {
if (aTopic != "browser:purge-session-history")
return;
let newTab = Browser.addTab("about:start", true);
let tab = Browser._tabs[0];
while(tab != newTab) {
Browser.closeTab(tab, { forceClose: true } );
tab = Browser._tabs[0];
}
PlacesUtils.history.removeAllPages();
// Clear undo history of the URL bar
BrowserUI._edit.editor.transactionManager.clear();
}
};
function getNotificationBox(aBrowser) {
return Browser.getNotificationBox(aBrowser);
}
function showDownloadManager(aWindowContext, aID, aReason) {
// TODO: Bug 883962: Toggle the downloads infobar as our current "download manager".
}
function Tab(aURI, aParams, aOwner) {
this._id = null;
this._browser = null;
this._notification = null;
this._loading = false;
this._progressActive = false;
this._progressCount = 0;
this._chromeTab = null;
this._eventDeferred = null;
this._updateThumbnailTimeout = null;
this._private = false;
if ("private" in aParams) {
this._private = aParams.private;
} else if (aOwner) {
this._private = aOwner._private;
}
this.owner = aOwner || null;
// Set to 0 since new tabs that have not been viewed yet are good tabs to
// toss if app needs more memory.
this.lastSelected = 0;
// aParams is an object that contains some properties for the initial tab
// loading like flags, a referrerURI, a charset or even a postData.
this.create(aURI, aParams || {}, aOwner);
// default tabs to inactive (i.e. no display port)
this.active = false;
}
Tab.prototype = {
get browser() {
return this._browser;
},
get notification() {
return this._notification;
},
get chromeTab() {
return this._chromeTab;
},
get isPrivate() {
return this._private;
},
get pageShowPromise() {
return this._eventDeferred ? this._eventDeferred.promise : null;
},
startLoading: function startLoading() {
if (this._loading) {
let stack = new Error().stack;
throw "Already Loading!\n" + stack;
}
this._loading = true;
},
endLoading: function endLoading() {
this._loading = false;
this.updateFavicon();
},
isLoading: function isLoading() {
return this._loading;
},
create: function create(aURI, aParams, aOwner) {
this._eventDeferred = Promise.defer();
this._chromeTab = Elements.tabList.addTab(aParams.index);
if (this.isPrivate) {
this._chromeTab.setAttribute("private", "true");
}
this._id = Browser.createTabId();
let browser = this._createBrowser(aURI, null);
let self = this;
function onPageShowEvent(aEvent) {
browser.removeEventListener("pageshow", onPageShowEvent);
if (self._eventDeferred) {
self._eventDeferred.resolve(self);
}
self._eventDeferred = null;
}
browser.addEventListener("pageshow", onPageShowEvent, true);
browser.addEventListener("DOMWindowCreated", this, false);
browser.addEventListener("StartUIChange", this, false);
Elements.browsers.addEventListener("SizeChanged", this, false);
browser.messageManager.addMessageListener("Content:StateChange", this);
if (aOwner)
this._copyHistoryFrom(aOwner);
this._loadUsingParams(browser, aURI, aParams);
},
updateViewport: function (aEvent) {
// <meta name=viewport> is not yet supported; just use the browser size.
let browser = this.browser;
// On the start page we add padding to keep the browser above the navbar.
let paddingBottom = parseInt(getComputedStyle(browser).paddingBottom, 10);
let height = browser.clientHeight - paddingBottom;
browser.setWindowSize(browser.clientWidth, height);
},
handleEvent: function (aEvent) {
switch (aEvent.type) {
case "DOMWindowCreated":
case "StartUIChange":
this.updateViewport();
break;
case "SizeChanged":
this.updateViewport();
this._delayUpdateThumbnail();
break;
}
},
receiveMessage: function(aMessage) {
switch (aMessage.name) {
case "Content:StateChange":
// update the thumbnail now...
this.updateThumbnail();
// ...and in a little while to capture page after load.
if (aMessage.json.stateFlags & Ci.nsIWebProgressListener.STATE_STOP) {
this._delayUpdateThumbnail();
}
break;
}
},
_delayUpdateThumbnail: function() {
clearTimeout(this._updateThumbnailTimeout);
this._updateThumbnailTimeout = setTimeout(() => {
this.updateThumbnail();
}, kTabThumbnailDelayCapture);
},
destroy: function destroy() {
this._browser.messageManager.removeMessageListener("Content:StateChange", this);
this._browser.removeEventListener("DOMWindowCreated", this, false);
this._browser.removeEventListener("StartUIChange", this, false);
Elements.browsers.removeEventListener("SizeChanged", this, false);
clearTimeout(this._updateThumbnailTimeout);
Elements.tabList.removeTab(this._chromeTab);
this._chromeTab = null;
this._destroyBrowser();
},
resurrect: function resurrect() {
let dead = this._browser;
let active = this.active;
// Hold onto the session store data
let session = { data: dead.__SS_data, extra: dead.__SS_extdata };
// We need this data to correctly create and position the new browser
// If this browser is already a zombie, fallback to the session data
let currentURL = dead.__SS_restore ? session.data.entries[0].url : dead.currentURI.spec;
let sibling = dead.nextSibling;
// Destory and re-create the browser
this._destroyBrowser();
let browser = this._createBrowser(currentURL, sibling);
if (active)
this.active = true;
// Reattach session store data and flag this browser so it is restored on select
browser.__SS_data = session.data;
browser.__SS_extdata = session.extra;
browser.__SS_restore = true;
},
_copyHistoryFrom: function _copyHistoryFrom(tab) {
let otherHistory = tab._browser._webNavigation.sessionHistory;
let history = this._browser._webNavigation.sessionHistory;
// Ensure that history is initialized
history.QueryInterface(Ci.nsISHistoryInternal);
for (let i = 0, length = otherHistory.index; i <= length; i++)
history.addEntry(otherHistory.getEntryAtIndex(i, false), true);
},
_loadUsingParams: function _loadUsingParams(aBrowser, aURI, aParams) {
let flags = aParams.flags || Ci.nsIWebNavigation.LOAD_FLAGS_NONE;
let postData = ("postData" in aParams && aParams.postData) ? aParams.postData.value : null;
let referrerURI = "referrerURI" in aParams ? aParams.referrerURI : null;
let charset = "charset" in aParams ? aParams.charset : null;
aBrowser.loadURIWithFlags(aURI, flags, referrerURI, charset, postData);
},
_createBrowser: function _createBrowser(aURI, aInsertBefore) {
if (this._browser)
throw "Browser already exists";
// Create a notification box around the browser. Note this includes
// the input overlay we use to shade content from input events when
// we're intercepting touch input.
let notification = this._notification = document.createElement("notificationbox");
let browser = this._browser = document.createElement("browser");
browser.id = "browser-" + this._id;
this._chromeTab.linkedBrowser = browser;
browser.setAttribute("type", "content");
let useRemote = Services.appinfo.browserTabsRemote;
let useLocal = Util.isLocalScheme(aURI);
browser.setAttribute("remote", (!useLocal && useRemote) ? "true" : "false");
// Append the browser to the document, which should start the page load
let stack = document.createElementNS(XUL_NS, "stack");
stack.className = "browserStack";
stack.appendChild(browser);
stack.setAttribute("flex", "1");
notification.appendChild(stack);
Elements.browsers.insertBefore(notification, aInsertBefore);
notification.dir = "reverse";
// let the content area manager know about this browser.
ContentAreaObserver.onBrowserCreated(browser);
if (this.isPrivate) {
let ctx = browser.docShell.QueryInterface(Ci.nsILoadContext);
ctx.usePrivateBrowsing = true;
}
// stop about:blank from loading
browser.stop();
let fl = browser.QueryInterface(Ci.nsIFrameLoaderOwner).frameLoader;
fl.renderMode = Ci.nsIFrameLoader.RENDER_MODE_ASYNC_SCROLL;
return browser;
},
_destroyBrowser: function _destroyBrowser() {
if (this._browser) {
let notification = this._notification;
let browser = this._browser;
browser.active = false;
this._notification = null;
this._browser = null;
this._loading = false;
Elements.browsers.removeChild(notification);
}
},
updateThumbnail: function updateThumbnail() {
if (!this.isPrivate) {
PageThumbs.captureToCanvas(this.browser.contentWindow, this._chromeTab.thumbnailCanvas);
}
},
updateFavicon: function updateFavicon() {
this._chromeTab.updateFavicon(this._browser.mIconURL);
},
set active(aActive) {
if (!this._browser)
return;
let notification = this._notification;
let browser = this._browser;
if (aActive) {
notification.classList.add("active-tab-notificationbox");
browser.setAttribute("type", "content-primary");
Elements.browsers.selectedPanel = notification;
browser.active = true;
Elements.tabList.selectedTab = this._chromeTab;
browser.focus();
} else {
notification.classList.remove("active-tab-notificationbox");
browser.messageManager.sendAsyncMessage("Browser:Blur", { });
browser.setAttribute("type", "content");
browser.active = false;
}
},
get active() {
if (!this._browser)
return false;
return this._browser.getAttribute("type") == "content-primary";
},
toString: function() {
return "[Tab " + (this._browser ? this._browser.currentURI.spec : "(no browser)") + "]";
}
};
// Helper used to hide IPC / non-IPC differences for rendering to a canvas
function rendererFactory(aBrowser, aCanvas) {
let wrapper = {};
if (aBrowser.contentWindow) {
let ctx = aCanvas.getContext("2d");
let draw = function(browser, aLeft, aTop, aWidth, aHeight, aColor, aFlags) {
ctx.drawWindow(browser.contentWindow, aLeft, aTop, aWidth, aHeight, aColor, aFlags);
let e = document.createEvent("HTMLEvents");
e.initEvent("MozAsyncCanvasRender", true, true);
aCanvas.dispatchEvent(e);
};
wrapper.checkBrowser = function(browser) {
return browser.contentWindow;
};
wrapper.drawContent = function(callback) {
callback(ctx, draw);
};
}
else {
let ctx = aCanvas.MozGetIPCContext("2d");
let draw = function(browser, aLeft, aTop, aWidth, aHeight, aColor, aFlags) {
ctx.asyncDrawXULElement(browser, aLeft, aTop, aWidth, aHeight, aColor, aFlags);
};
wrapper.checkBrowser = function(browser) {
return !browser.contentWindow;
};
wrapper.drawContent = function(callback) {
callback(ctx, draw);
};
}
return wrapper;
};
// Based on ClickEventHandler from /browser/base/content/content.js
let ClickEventHandler = {
init: function () {
gEventListenerService.addSystemEventListener(Elements.browsers, "click", this, true);
},
uninit: function () {
gEventListenerService.removeSystemEventListener(Elements.browsers, "click", this, true);
},
handleEvent: function (aEvent) {
if (!aEvent.isTrusted || aEvent.defaultPrevented) {
return;
}
let [href, node] = this._hrefAndLinkNodeForClickEvent(aEvent);
if (href && (aEvent.button == 1 || aEvent.ctrlKey)) {
// Open link in a new tab for middle-click or ctrl-click
BrowserUI.openLinkInNewTab(href, aEvent.shiftKey, Browser.selectedTab);
}
},
/**
* Extracts linkNode and href for the current click target.
*
* @param event
* The click event.
* @return [href, linkNode].
*
* @note linkNode will be null if the click wasn't on an anchor
* element (or XLink).
*/
_hrefAndLinkNodeForClickEvent: function(event) {
function isHTMLLink(aNode) {
return ((aNode instanceof content.HTMLAnchorElement && aNode.href) ||
(aNode instanceof content.HTMLAreaElement && aNode.href) ||
aNode instanceof content.HTMLLinkElement);
}
let node = event.target;
while (node && !isHTMLLink(node)) {
node = node.parentNode;
}
if (node)
return [node.href, node];
// If there is no linkNode, try simple XLink.
let href, baseURI;
node = event.target;
while (node && !href) {
if (node.nodeType == content.Node.ELEMENT_NODE) {
href = node.getAttributeNS("http://www.w3.org/1999/xlink", "href");
if (href)
baseURI = node.ownerDocument.baseURIObject;
}
node = node.parentNode;
}
// In case of XLink, we don't return the node we got href from since
// callers expect <a>-like elements.
// Note: makeURI() will throw if aUri is not a valid URI.
return [href ? Services.io.newURI(href, null, baseURI).spec : null, null];
}
};
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