move browser to webbrowser/

1 files changed, 0 insertions, 1603 deletions

diff --git a/base/content/nsContextMenu.js b/base/content/nsContextMenu.js
deleted file mode 100644
index 916dd26..0000000
--- a/base/content/nsContextMenu.js
+++ /dev/null
@@ -1,1603 +0,0 @@
-# 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/.
-
-Components.utils.import("resource://gre/modules/PrivateBrowsingUtils.jsm");
-
-var gContextMenuContentData = null;
-
-function nsContextMenu(aXulMenu, aIsShift) {
-  this.shouldDisplay = true;
-  this.initMenu(aXulMenu, aIsShift);
-}
-
-// Prototype for nsContextMenu "class."
-nsContextMenu.prototype = {
-  initMenu: function CM_initMenu(aXulMenu, aIsShift) {
-    // Get contextual info.
-    this.setTarget(document.popupNode, document.popupRangeParent,
-                   document.popupRangeOffset);
-    if (!this.shouldDisplay)
-      return;
-
-    this.hasPageMenu = false;
-    if (!aIsShift) {
-      this.hasPageMenu = PageMenu.maybeBuildAndAttachMenu(this.target,
-                                                          aXulMenu);
-    }
-
-    this.isFrameImage = document.getElementById("isFrameImage");
-    this.ellipsis = "\u2026";
-    try {
-      this.ellipsis = gPrefService.getComplexValue("intl.ellipsis",
-                                                   Ci.nsIPrefLocalizedString).data;
-    } catch (e) { }
-
-    this.isContentSelected = this.isContentSelection();
-    this.onPlainTextLink = false;
-
-    // Initialize (disable/remove) menu items.
-    this.initItems();
-  },
-
-  hiding: function CM_hiding() {
-    gContextMenuContentData = null;
-    InlineSpellCheckerUI.clearSuggestionsFromMenu();
-    InlineSpellCheckerUI.clearDictionaryListFromMenu();
-    InlineSpellCheckerUI.uninit();
-  },
-
-  initItems: function CM_initItems() {
-    this.initPageMenuSeparator();
-    this.initOpenItems();
-    this.initNavigationItems();
-    this.initViewItems();
-    this.initMiscItems();
-    this.initSpellingItems();
-    this.initSaveItems();
-    this.initClipboardItems();
-    this.initMediaPlayerItems();
-    this.initLeaveDOMFullScreenItems();
-    this.initClickToPlayItems();
-  },
-
-  initPageMenuSeparator: function CM_initPageMenuSeparator() {
-    this.showItem("page-menu-separator", this.hasPageMenu);
-  },
-
-  initOpenItems: function CM_initOpenItems() {
-    var isMailtoInternal = false;
-    if (this.onMailtoLink) {
-      var mailtoHandler = Cc["@mozilla.org/uriloader/external-protocol-service;1"].
-                          getService(Ci.nsIExternalProtocolService).
-                          getProtocolHandlerInfo("mailto");
-      isMailtoInternal = (!mailtoHandler.alwaysAskBeforeHandling &&
-                          mailtoHandler.preferredAction == Ci.nsIHandlerInfo.useHelperApp &&
-                          (mailtoHandler.preferredApplicationHandler instanceof Ci.nsIWebHandlerApp));
-    }
-
-    // Time to do some bad things and see if we've highlighted a URL that
-    // isn't actually linked.
-    if (this.isTextSelected && !this.onLink) {
-      // Ok, we have some text, let's figure out if it looks like a URL.
-      let selection =  document.commandDispatcher.focusedWindow
-                               .getSelection();
-      let linkText = selection.toString().trim();
-      let uri;
-      if (/^(?:https?|ftp):/i.test(linkText)) {
-        try {
-          uri = makeURI(linkText);
-        } catch (ex) {}
-      }
-      // Check if this could be a valid url, just missing the protocol.
-      else if (/^[-a-z\d\.]+\.[-a-z\d]{2,}[-_=~:#%&\?\w\/\.]*$/i.test(linkText)) {
-        let uriFixup = Cc["@mozilla.org/docshell/urifixup;1"]
-                         .getService(Ci.nsIURIFixup);
-        try {
-          uri = uriFixup.createFixupURI(linkText, uriFixup.FIXUP_FLAG_NONE);
-        } catch (ex) {}
-      }
-
-      if (uri && uri.host) {
-        this.linkURI = uri;
-        this.linkURL = this.linkURI.spec;
-        this.onPlainTextLink = true;
-      }
-    }
-
-    var shouldShow = this.onSaveableLink || isMailtoInternal || this.onPlainTextLink;
-    var isWindowPrivate = PrivateBrowsingUtils.isWindowPrivate(window);
-    this.showItem("context-openlink", shouldShow && !isWindowPrivate);
-    this.showItem("context-openlinkprivate", shouldShow);
-    this.showItem("context-openlinkintab", shouldShow);
-    this.showItem("context-openlinkincurrent", shouldShow);
-    this.showItem("context-sep-open", shouldShow);
-  },
-
-  initNavigationItems: function CM_initNavigationItems() {
-    var shouldShow = !(this.isContentSelected || this.onLink || this.onImage ||
-                       this.onCanvas || this.onVideo || this.onAudio ||
-                       this.onTextInput);
-    this.showItem("context-back", shouldShow);
-    this.showItem("context-forward", shouldShow);
-
-    let stopped = XULBrowserWindow.stopCommand.getAttribute("disabled") == "true";
-
-    let stopReloadItem = "";
-    if (shouldShow) {
-      stopReloadItem = stopped ? "reload" : "stop";
-    }
-
-    this.showItem("context-reload", stopReloadItem == "reload");
-    this.showItem("context-stop", stopReloadItem == "stop");
-    this.showItem("context-sep-stop", !!stopReloadItem);
-
-    // XXX: Stop is determined in browser.js; the canStop broadcaster is broken
-    //this.setItemAttrFromNode( "context-stop", "disabled", "canStop" );
-  },
-
-  initLeaveDOMFullScreenItems: function CM_initLeaveFullScreenItem() {
-    // only show the option if the user is in DOM fullscreen
-    var shouldShow = (this.target.ownerDocument.mozFullScreenElement != null);
-    this.showItem("context-leave-dom-fullscreen", shouldShow);
-
-    // Explicitly show if in DOM fullscreen, but do not hide it has already been shown
-    if (shouldShow)
-        this.showItem("context-media-sep-commands", true);
-  },
-
-  initSaveItems: function CM_initSaveItems() {
-    var shouldShow = !(this.onTextInput || this.onLink ||
-                       this.isContentSelected || this.onImage ||
-                       this.onCanvas || this.onVideo || this.onAudio);
-    this.showItem("context-savepage", shouldShow);
-    this.showItem("context-sendpage", shouldShow);
-
-    // Save+Send link depends on whether we're in a link, or selected text matches valid URL pattern.
-    this.showItem("context-savelink", this.onSaveableLink || this.onPlainTextLink);
-    this.showItem("context-sendlink", this.onSaveableLink || this.onPlainTextLink);
-
-    // Save image depends on having loaded its content, video and audio don't.
-    this.showItem("context-saveimage", this.onLoadedImage || this.onCanvas);
-    this.showItem("context-savevideo", this.onVideo);
-    this.showItem("context-saveaudio", this.onAudio);
-    this.showItem("context-video-saveimage", this.onVideo);
-    this.setItemAttr("context-savevideo", "disabled", !this.mediaURL);
-    this.setItemAttr("context-saveaudio", "disabled", !this.mediaURL);
-    // Send media URL (but not for canvas, since it's a big data: URL)
-    this.showItem("context-sendimage", this.onImage);
-    this.showItem("context-sendvideo", this.onVideo);
-    this.showItem("context-sendaudio", this.onAudio);
-    this.setItemAttr("context-sendvideo", "disabled", !this.mediaURL);
-    this.setItemAttr("context-sendaudio", "disabled", !this.mediaURL);
-  },
-
-  initViewItems: function CM_initViewItems() {
-    // View source is always OK, unless in directory listing.
-    this.showItem("context-viewpartialsource-selection",
-                  this.isContentSelected);
-    this.showItem("context-viewpartialsource-mathml",
-                  this.onMathML && !this.isContentSelected);
-
-    var shouldShow = !(this.isContentSelected ||
-                       this.onImage || this.onCanvas ||
-                       this.onVideo || this.onAudio ||
-                       this.onLink || this.onTextInput);
-    this.showItem("context-viewsource", shouldShow);
-    this.showItem("context-viewinfo", shouldShow);
-#ifdef MOZ_DEVTOOLS
-    var showInspect = gPrefService.getBoolPref("devtools.inspector.enabled");
-    this.showItem("inspect-separator", showInspect);
-    this.showItem("context-inspect", showInspect);
-#endif
-
-    this.showItem("context-sep-viewsource", shouldShow);
-
-    // Set as Desktop background depends on whether an image was clicked on,
-    // and only works if we have a shell service.
-    var haveSetDesktopBackground = false;
-#ifdef HAVE_SHELL_SERVICE
-    // Only enable Set as Desktop Background if we can get the shell service.
-    var shell = getShellService();
-    if (shell)
-      haveSetDesktopBackground = shell.canSetDesktopBackground;
-#endif
-    this.showItem("context-setDesktopBackground",
-                  haveSetDesktopBackground && this.onLoadedImage);
-
-    if (haveSetDesktopBackground && this.onLoadedImage) {
-      document.getElementById("context-setDesktopBackground")
-              .disabled = this.disableSetDesktopBackground();
-    }
-
-    // Reload image depends on an image that's not fully loaded
-    this.showItem("context-reloadimage", (this.onImage && !this.onCompletedImage));
-
-    // View image depends on having an image that's not standalone
-    // (or is in a frame), or a canvas.
-    this.showItem("context-viewimage", (this.onImage &&
-                  (!this.inSyntheticDoc || this.inFrame)) || this.onCanvas);
-
-    // View video depends on not having a standalone video.
-    this.showItem("context-viewvideo", this.onVideo && (!this.inSyntheticDoc || this.inFrame));
-    this.setItemAttr("context-viewvideo",  "disabled", !this.mediaURL);
-
-    // View background image depends on whether there is one, but don't make
-    // background images of a stand-alone media document available.
-    this.showItem("context-viewbgimage", shouldShow &&
-                                         !this._hasMultipleBGImages &&
-                                         !this.inSyntheticDoc);
-    this.showItem("context-sep-viewbgimage", shouldShow &&
-                                             !this._hasMultipleBGImages &&
-                                             !this.inSyntheticDoc);
-    document.getElementById("context-viewbgimage")
-            .disabled = !this.hasBGImage;
-
-    this.showItem("context-viewimageinfo", this.onImage);
-  },
-
-  initMiscItems: function CM_initMiscItems() {
-    // Use "Bookmark This Link" if on a link.
-    this.showItem("context-bookmarkpage",
-                  !(this.isContentSelected || this.onTextInput || this.onLink ||
-                    this.onImage || this.onVideo || this.onAudio));
-    this.showItem("context-bookmarklink", (this.onLink && !this.onMailtoLink) ||
-                                          this.onPlainTextLink);
-    this.showItem("context-keywordfield",
-                  this.onTextInput && this.onKeywordField);
-    this.showItem("frame", this.inFrame);
-
-    let showSearchSelect = (this.isTextSelected || this.onLink) && !this.onImage;
-    this.showItem("context-searchselect", showSearchSelect);
-    if (showSearchSelect) {
-      this.formatSearchContextItem();
-    }
-
-    // srcdoc cannot be opened separately due to concerns about web
-    // content with about:srcdoc in location bar masquerading as trusted
-    // chrome/addon content.
-    // No need to also test for this.inFrame as this is checked in the parent
-    // submenu.
-    this.showItem("context-showonlythisframe", !this.inSrcdocFrame);
-    this.showItem("context-openframeintab", !this.inSrcdocFrame);
-    this.showItem("context-openframe", !this.inSrcdocFrame);
-    this.showItem("context-bookmarkframe", !this.inSrcdocFrame);
-    this.showItem("open-frame-sep", !this.inSrcdocFrame);
-
-    this.showItem("frame-sep", this.inFrame && this.isTextSelected);
-
-    // Hide menu entries for images, show otherwise
-    if (this.inFrame) {
-      if (BrowserUtils.mimeTypeIsTextBased(this.target.ownerDocument.contentType))
-        this.isFrameImage.removeAttribute('hidden');
-      else
-        this.isFrameImage.setAttribute('hidden', 'true');
-    }
-
-    // BiDi UI
-    this.showItem("context-sep-bidi", top.gBidiUI);
-    this.showItem("context-bidi-text-direction-toggle",
-                  this.onTextInput && top.gBidiUI);
-    this.showItem("context-bidi-page-direction-toggle",
-                  !this.onTextInput && top.gBidiUI);
-  },
-
-  initSpellingItems: function() {
-    var canSpell = InlineSpellCheckerUI.canSpellCheck && this.canSpellCheck;
-    var onMisspelling = InlineSpellCheckerUI.overMisspelling;
-    var showUndo = canSpell && InlineSpellCheckerUI.canUndo();
-    this.showItem("spell-check-enabled", canSpell);
-    this.showItem("spell-separator", canSpell || this.onEditableArea);
-    document.getElementById("spell-check-enabled")
-            .setAttribute("checked", canSpell && InlineSpellCheckerUI.enabled);
-
-    this.showItem("spell-add-to-dictionary", onMisspelling);
-    this.showItem("spell-undo-add-to-dictionary", showUndo);
-
-    // suggestion list
-    this.showItem("spell-suggestions-separator", onMisspelling || showUndo);
-    if (onMisspelling) {
-      var suggestionsSeparator =
-        document.getElementById("spell-add-to-dictionary");
-      var numsug =
-        InlineSpellCheckerUI.addSuggestionsToMenu(suggestionsSeparator.parentNode,
-                                                  suggestionsSeparator, 5);
-      this.showItem("spell-no-suggestions", numsug == 0);
-    }
-    else
-      this.showItem("spell-no-suggestions", false);
-
-    // dictionary list
-    this.showItem("spell-dictionaries", canSpell && InlineSpellCheckerUI.enabled);
-    if (canSpell) {
-      var dictMenu = document.getElementById("spell-dictionaries-menu");
-      var dictSep = document.getElementById("spell-language-separator");
-      InlineSpellCheckerUI.addDictionaryListToMenu(dictMenu, dictSep);
-      this.showItem("spell-add-dictionaries-main", false);
-    }
-    else if (this.onEditableArea) {
-      // when there is no spellchecker but we might be able to spellcheck
-      // add the add to dictionaries item. This will ensure that people
-      // with no dictionaries will be able to download them
-      this.showItem("spell-add-dictionaries-main", true);
-    }
-    else
-      this.showItem("spell-add-dictionaries-main", false);
-  },
-
-  initClipboardItems: function() {
-    // Copy depends on whether there is selected text.
-    // Enabling this context menu item is now done through the global
-    // command updating system
-    // this.setItemAttr( "context-copy", "disabled", !this.isTextSelected() );
-    goUpdateGlobalEditMenuItems();
-
-    this.showItem("context-undo", this.onTextInput);
-    this.showItem("context-sep-undo", this.onTextInput);
-    this.showItem("context-cut", this.onTextInput);
-    this.showItem("context-copy",
-                  this.isContentSelected || this.onTextInput);
-    this.showItem("context-paste", this.onTextInput);
-    this.showItem("context-delete", this.onTextInput);
-    this.showItem("context-sep-paste", this.onTextInput);
-    this.showItem("context-selectall", !(this.onLink || this.onImage ||
-                                         this.onVideo || this.onAudio ||
-                                         this.inSyntheticDoc) ||
-                                       this.isDesignMode);
-    this.showItem("context-sep-selectall", this.isContentSelected );
-
-    // XXX dr
-    // ------
-    // nsDocumentViewer.cpp has code to determine whether we're
-    // on a link or an image. we really ought to be using that...
-
-    // Copy email link depends on whether we're on an email link.
-    this.showItem("context-copyemail", this.onMailtoLink);
-
-    // Copy link location depends on whether we're on a non-mailto link.
-    this.showItem("context-copylink", this.onLink && !this.onMailtoLink);
-    this.showItem("context-sep-copylink", this.onLink &&
-                  (this.onImage || this.onVideo || this.onAudio));
-
-#ifdef CONTEXT_COPY_IMAGE_CONTENTS
-    // Copy image contents depends on whether we're on an image.
-    this.showItem("context-copyimage-contents", this.onImage);
-#endif
-    // Copy image location depends on whether we're on an image.
-    this.showItem("context-copyimage", this.onImage);
-    this.showItem("context-copyvideourl", this.onVideo);
-    this.showItem("context-copyaudiourl", this.onAudio);
-    this.setItemAttr("context-copyvideourl",  "disabled", !this.mediaURL);
-    this.setItemAttr("context-copyaudiourl",  "disabled", !this.mediaURL);
-    this.showItem("context-sep-copyimage", this.onImage ||
-                  this.onVideo || this.onAudio);
-  },
-
-  initMediaPlayerItems: function() {
-    var onMedia = (this.onVideo || this.onAudio);
-    // Several mutually exclusive items... play/pause, mute/unmute, show/hide
-    this.showItem("context-media-play",  onMedia && (this.target.paused || this.target.ended));
-    this.showItem("context-media-pause", onMedia && !this.target.paused && !this.target.ended);
-    this.showItem("context-media-mute",   onMedia && !this.target.muted);
-    this.showItem("context-media-unmute", onMedia && this.target.muted);
-    this.showItem("context-media-playbackrate", onMedia);
-    this.showItem("context-media-loop", onMedia);
-    this.showItem("context-media-showcontrols", onMedia && !this.target.controls);
-    this.showItem("context-media-hidecontrols", onMedia && this.target.controls);
-    this.showItem("context-video-fullscreen", this.onVideo && this.target.ownerDocument.mozFullScreenElement == null);
-    var statsShowing = this.onVideo && XPCNativeWrapper.unwrap(this.target).mozMediaStatisticsShowing;
-    this.showItem("context-video-showstats", this.onVideo && this.target.controls && !statsShowing);
-    this.showItem("context-video-hidestats", this.onVideo && this.target.controls && statsShowing);
-
-    // Disable them when there isn't a valid media source loaded.
-    if (onMedia) {
-      this.setItemAttr("context-media-playbackrate-050x", "checked", this.target.playbackRate == 0.5);
-      this.setItemAttr("context-media-playbackrate-100x", "checked", this.target.playbackRate == 1.0);
-      this.setItemAttr("context-media-playbackrate-150x", "checked", this.target.playbackRate == 1.5);
-      this.setItemAttr("context-media-playbackrate-200x", "checked", this.target.playbackRate == 2.0);
-      this.setItemAttr("context-media-loop", "checked", this.target.loop);
-      var hasError = this.target.error != null ||
-                     this.target.networkState == this.target.NETWORK_NO_SOURCE;
-      this.setItemAttr("context-media-play",  "disabled", hasError);
-      this.setItemAttr("context-media-pause", "disabled", hasError);
-      this.setItemAttr("context-media-mute",   "disabled", hasError);
-      this.setItemAttr("context-media-unmute", "disabled", hasError);
-      this.setItemAttr("context-media-playbackrate", "disabled", hasError);
-      this.setItemAttr("context-media-playbackrate-050x", "disabled", hasError);
-      this.setItemAttr("context-media-playbackrate-100x", "disabled", hasError);
-      this.setItemAttr("context-media-playbackrate-150x", "disabled", hasError);
-      this.setItemAttr("context-media-playbackrate-200x", "disabled", hasError);
-      this.setItemAttr("context-media-showcontrols", "disabled", hasError);
-      this.setItemAttr("context-media-hidecontrols", "disabled", hasError);
-      if (this.onVideo) {
-        let canSaveSnapshot = this.target.readyState >= this.target.HAVE_CURRENT_DATA;
-        this.setItemAttr("context-video-saveimage",  "disabled", !canSaveSnapshot);
-        this.setItemAttr("context-video-fullscreen", "disabled", hasError);
-        this.setItemAttr("context-video-showstats", "disabled", hasError);
-        this.setItemAttr("context-video-hidestats", "disabled", hasError);
-      }
-    }
-    this.showItem("context-media-sep-commands",  onMedia);
-  },
-
-  initClickToPlayItems: function() {
-    this.showItem("context-ctp-play", this.onCTPPlugin);
-    this.showItem("context-ctp-hide", this.onCTPPlugin);
-    this.showItem("context-sep-ctp", this.onCTPPlugin);
-  },
-
-  inspectNode: function CM_inspectNode() {
-    let {devtools} = Cu.import("resource://devtools/shared/Loader.jsm", {});
-    let gBrowser = this.browser.ownerDocument.defaultView.gBrowser;
-    let target = devtools.TargetFactory.forTab(gBrowser.selectedTab);
-
-    return gDevTools.showToolbox(target, "inspector").then(function(toolbox) {
-      let inspector = toolbox.getCurrentPanel();
-
-      this.browser.messageManager.sendAsyncMessage("debug:inspect", {}, {node: this.target});
-      inspector.walker.findInspectingNode().then(nodeFront => {
-        inspector.selection.setNodeFront(nodeFront, "browser-context-menu");
-      });
-    }.bind(this));
-  },
-
-  // Set various context menu attributes based on the state of the world.
-  setTarget: function (aNode, aRangeParent, aRangeOffset) {
-    const xulNS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
-    if (aNode.namespaceURI == xulNS ||
-        aNode.nodeType == Node.DOCUMENT_NODE ||
-        this.isDisabledForEvents(aNode)) {
-      this.shouldDisplay = false;
-      return;
-    }
-
-    // Initialize contextual info.
-    this.onImage           = false;
-    this.onLoadedImage     = false;
-    this.onCompletedImage  = false;
-    this.onCanvas          = false;
-    this.onVideo           = false;
-    this.onAudio           = false;
-    this.onTextInput       = false;
-    this.onKeywordField    = false;
-    this.mediaURL          = "";
-    this.onLink            = false;
-    this.onMailtoLink      = false;
-    this.onSaveableLink    = false;
-    this.link              = null;
-    this.linkURL           = "";
-    this.linkURI           = null;
-    this.linkProtocol      = "";
-    this.linkDownload      = "";
-    this.onMathML          = false;
-    this.inFrame           = false;
-    this.inSrcdocFrame     = false;
-    this.inSyntheticDoc    = false;
-    this.hasBGImage        = false;
-    this.bgImageURL        = "";
-    this.onEditableArea    = false;
-    this.isDesignMode      = false;
-    this.onCTPPlugin       = false;
-    this.canSpellCheck     = false;
-    this.textSelected      = getBrowserSelection();
-    this.isTextSelected    = this.textSelected.length != 0;
-
-    // Remember the node that was clicked.
-    this.target = aNode;
-
-    this.browser = this.target.ownerDocument.defaultView
-                                .QueryInterface(Ci.nsIInterfaceRequestor)
-                                .getInterface(Ci.nsIWebNavigation)
-                                .QueryInterface(Ci.nsIDocShell)
-                                .chromeEventHandler;
-
-    // Check if we are in a synthetic document (stand alone image, video, etc.).
-    this.inSyntheticDoc =  this.target.ownerDocument.mozSyntheticDocument;
-    // First, do checks for nodes that never have children.
-    if (this.target.nodeType == Node.ELEMENT_NODE) {
-      // See if the user clicked on an image.
-      if (this.target instanceof Ci.nsIImageLoadingContent &&
-          this.target.currentURI) {
-        this.onImage = true;
-
-        var request =
-          this.target.getRequest(Ci.nsIImageLoadingContent.CURRENT_REQUEST);
-        if (request && (request.imageStatus & request.STATUS_SIZE_AVAILABLE))
-          this.onLoadedImage = true;
-        if (request && (request.imageStatus & request.STATUS_LOAD_COMPLETE))
-          this.onCompletedImage = true;
-
-        this.mediaURL = this.target.currentURI.spec;
-      }
-      else if (this.target instanceof HTMLCanvasElement) {
-        this.onCanvas = true;
-      }
-      else if (this.target instanceof HTMLVideoElement) {
-        this.mediaURL = this.target.currentSrc || this.target.src;
-        // Firefox always creates a HTMLVideoElement when loading an ogg file
-        // directly. If the media is actually audio, be smarter and provide a
-        // context menu with audio operations.
-        if (this.target.readyState >= this.target.HAVE_METADATA &&
-            (this.target.videoWidth == 0 || this.target.videoHeight == 0)) {
-          this.onAudio = true;
-        } else {
-          this.onVideo = true;
-        }
-      }
-      else if (this.target instanceof HTMLAudioElement) {
-        this.onAudio = true;
-        this.mediaURL = this.target.currentSrc || this.target.src;
-      }
-      else if (this.target instanceof HTMLInputElement ) {
-        this.onTextInput = this.isTargetATextBox(this.target);
-        // Allow spellchecking UI on all text and search inputs.
-        if (this.onTextInput && ! this.target.readOnly &&
-            (this.target.type == "text" || this.target.type == "search")) {
-          this.onEditableArea = true;
-          InlineSpellCheckerUI.init(this.target.QueryInterface(Ci.nsIDOMNSEditableElement).editor);
-          InlineSpellCheckerUI.initFromEvent(aRangeParent, aRangeOffset);
-        }
-        this.onKeywordField = this.isTargetAKeywordField(this.target);
-      }
-      else if (this.target instanceof HTMLTextAreaElement) {
-        this.onTextInput = true;
-        if (!this.target.readOnly) {
-          this.onEditableArea = true;
-          InlineSpellCheckerUI.init(this.target.QueryInterface(Ci.nsIDOMNSEditableElement).editor);
-          InlineSpellCheckerUI.initFromEvent(aRangeParent, aRangeOffset);
-        }
-      }
-      else if (this.target instanceof HTMLHtmlElement) {
-        var bodyElt = this.target.ownerDocument.body;
-        if (bodyElt) {
-          let computedURL;
-          try {
-            computedURL = this.getComputedURL(bodyElt, "background-image");
-            this._hasMultipleBGImages = false;
-          } catch (e) {
-            this._hasMultipleBGImages = true;
-          }
-          if (computedURL) {
-            this.hasBGImage = true;
-            this.bgImageURL = makeURLAbsolute(bodyElt.baseURI,
-                                              computedURL);
-          }
-        }
-      }
-      else if ((this.target instanceof HTMLEmbedElement ||
-                this.target instanceof HTMLObjectElement ||
-                this.target instanceof HTMLAppletElement) &&
-               this.target.displayedType == HTMLObjectElement.TYPE_NULL &&
-               this.target.pluginFallbackType == HTMLObjectElement.PLUGIN_CLICK_TO_PLAY) {
-        this.onCTPPlugin = true;
-      }
-
-      this.canSpellCheck = this._isSpellCheckEnabled(this.target);
-    }
-    else if (this.target.nodeType == Node.TEXT_NODE) {
-      // For text nodes, look at the parent node to determine the spellcheck attribute.
-      this.canSpellCheck = this.target.parentNode &&
-                           this._isSpellCheckEnabled(this.target);
-    }
-
-    // Second, bubble out, looking for items of interest that can have childen.
-    // Always pick the innermost link, background image, etc.
-    const XMLNS = "http://www.w3.org/XML/1998/namespace";
-    var elem = this.target;
-    while (elem) {
-      if (elem.nodeType == Node.ELEMENT_NODE) {
-        // Link?
-        if (!this.onLink &&
-            // Be consistent with what hrefAndLinkNodeForClickEvent
-            // does in browser.js
-             ((elem instanceof HTMLAnchorElement && elem.href) ||
-              (elem instanceof HTMLAreaElement && elem.href) ||
-              elem instanceof HTMLLinkElement ||
-              elem.getAttributeNS("http://www.w3.org/1999/xlink", "type") == "simple")) {
-
-          // Target is a link or a descendant of a link.
-          this.onLink = true;
-
-          // Remember corresponding element.
-          this.link = elem;
-          this.linkURL = this.getLinkURL();
-          this.linkURI = this.getLinkURI();
-          this.linkProtocol = this.getLinkProtocol();
-          this.onMailtoLink = (this.linkProtocol == "mailto");
-          this.onSaveableLink = this.isLinkSaveable( this.link );
-          try {
-            if (elem.download) {
-              // Ignore download attribute on cross-origin links?
-              // This shoudn't be an issue because the download link presents
-              // the originating URL domain and protocol to help user understand
-              // from where file is downloaded and make right decision.
-              // If we decide we want this restriction:
-              // this.principal.checkMayLoad(this.linkURI, false, true);
-              this.linkDownload = elem.download;
-            }
-          }
-          catch (ex) {}          
-        }
-
-        // Background image?  Don't bother if we've already found a
-        // background image further down the hierarchy.  Otherwise,
-        // we look for the computed background-image style.
-        if (!this.hasBGImage &&
-            !this._hasMultipleBGImages) {
-          let bgImgUrl;
-          try {
-            bgImgUrl = this.getComputedURL(elem, "background-image");
-            this._hasMultipleBGImages = false;
-          } catch (e) {
-            this._hasMultipleBGImages = true;
-          }
-          if (bgImgUrl) {
-            this.hasBGImage = true;
-            this.bgImageURL = makeURLAbsolute(elem.baseURI,
-                                              bgImgUrl);
-          }
-        }
-      }
-
-      elem = elem.parentNode;
-    }
-
-    // See if the user clicked on MathML
-    const NS_MathML = "http://www.w3.org/1998/Math/MathML";
-    if ((this.target.nodeType == Node.TEXT_NODE &&
-         this.target.parentNode.namespaceURI == NS_MathML)
-         || (this.target.namespaceURI == NS_MathML))
-      this.onMathML = true;
-
-    // See if the user clicked in a frame.
-    var docDefaultView = this.target.ownerDocument.defaultView;
-    if (docDefaultView != docDefaultView.top) {
-      this.inFrame = true;
-
-      if (this.target.ownerDocument.isSrcdocDocument) {
-          this.inSrcdocFrame = true;
-      }
-    }
-
-    // if the document is editable, show context menu like in text inputs
-    if (!this.onEditableArea) {
-      var win = this.target.ownerDocument.defaultView;
-      if (win) {
-        var isEditable = false;
-        try {
-          var editingSession = win.QueryInterface(Ci.nsIInterfaceRequestor)
-                                  .getInterface(Ci.nsIWebNavigation)
-                                  .QueryInterface(Ci.nsIInterfaceRequestor)
-                                  .getInterface(Ci.nsIEditingSession);
-          if (editingSession.windowIsEditable(win) &&
-              this.getComputedStyle(this.target, "-moz-user-modify") == "read-write") {
-            isEditable = true;
-          }
-        }
-        catch(ex) {
-          // If someone built with composer disabled, we can't get an editing session.
-        }
-
-        if (isEditable) {
-          this.onTextInput       = true;
-          this.onKeywordField    = false;
-          this.onImage           = false;
-          this.onLoadedImage     = false;
-          this.onCompletedImage  = false;
-          this.onMathML          = false;
-          this.inFrame           = false;
-          this.inSrcdocFrame     = false;
-          this.hasBGImage        = false;
-          this.isDesignMode      = true;
-          this.onEditableArea = true;
-          InlineSpellCheckerUI.init(editingSession.getEditorForWindow(win));
-          var canSpell = InlineSpellCheckerUI.canSpellCheck && this.canSpellCheck;
-          InlineSpellCheckerUI.initFromEvent(aRangeParent, aRangeOffset);
-          this.showItem("spell-check-enabled", canSpell);
-          this.showItem("spell-separator", canSpell);
-        }
-      }
-    }
-  },
-
-  // Returns the computed style attribute for the given element.
-  getComputedStyle: function(aElem, aProp) {
-    return aElem.ownerDocument
-                .defaultView
-                .getComputedStyle(aElem, "").getPropertyValue(aProp);
-  },
-
-  // Returns a "url"-type computed style attribute value, with the url() stripped.
-  getComputedURL: function(aElem, aProp) {
-    var url = aElem.ownerDocument
-                   .defaultView.getComputedStyle(aElem, "")
-                   .getPropertyCSSValue(aProp);
-    if (url instanceof CSSValueList) {
-      if (url.length != 1)
-        throw "found multiple URLs";
-      url = url[0];
-    }
-    return url.primitiveType == CSSPrimitiveValue.CSS_URI ?
-           url.getStringValue() : null;
-  },
-
-  // Returns true if clicked-on link targets a resource that can be saved.
-  isLinkSaveable: function(aLink) {
-    // We don't do the Right Thing for news/snews yet, so turn them off
-    // until we do.
-    return this.linkProtocol && !(
-             this.linkProtocol == "mailto"     ||
-             this.linkProtocol == "javascript" ||
-             this.linkProtocol == "news"       ||
-             this.linkProtocol == "snews"      );
-  },
-
-  _isSpellCheckEnabled: function(aNode) {
-    // We can always force-enable spellchecking on textboxes
-    if (this.isTargetATextBox(aNode)) {
-      return true;
-    }
-    // We can never spell check something which is not content editable
-    var editable = aNode.isContentEditable;
-    if (!editable && aNode.ownerDocument) {
-      editable = aNode.ownerDocument.designMode == "on";
-    }
-    if (!editable) {
-      return false;
-    }
-    // Otherwise make sure that nothing in the parent chain disables spellchecking
-    return aNode.spellcheck;
-  },
-
-  // Open linked-to URL in a new window.
-  openLink : function () {
-    var doc = this.target.ownerDocument;
-    urlSecurityCheck(this.linkURL, doc.nodePrincipal);
-    openLinkIn(this.linkURL, "window",
-               { charset: doc.characterSet,
-                 referrerURI: doc.documentURIObject,
-                 referrerPolicy: doc.referrerPolicy,
-                 originPrincipal: doc.nodePrincipal,
-                 triggeringPrincipal: doc.nodePrincipal });
-  },
-
-  // Open linked-to URL in a new private window.
-  openLinkInPrivateWindow : function () {
-    var doc = this.target.ownerDocument;
-    urlSecurityCheck(this.linkURL, doc.nodePrincipal);
-    openLinkIn(this.linkURL, "window",
-               { charset: doc.characterSet,
-                 referrerURI: doc.documentURIObject,
-                 referrerPolicy: doc.referrerPolicy,
-                 originPrincipal: doc.nodePrincipal,
-                 triggeringPrincipal: doc.nodePrincipal,
-                 private: true });
-  },
-
-  // Open linked-to URL in a new tab.
-  openLinkInTab: function() {
-    var doc = this.target.ownerDocument;
-    urlSecurityCheck(this.linkURL, doc.nodePrincipal);
-    openLinkIn(this.linkURL, "tab",
-               { charset: doc.characterSet,
-                 referrerURI: doc.documentURIObject,
-                 referrerPolicy: doc.referrerPolicy,
-                 originPrincipal: doc.nodePrincipal,
-                 triggeringPrincipal: doc.nodePrincipal });
-  },
-
-  // open URL in current tab
-  openLinkInCurrent: function() {
-    var doc = this.target.ownerDocument;
-    urlSecurityCheck(this.linkURL, doc.nodePrincipal);
-    openLinkIn(this.linkURL, "current",
-               { charset: doc.characterSet,
-                 referrerURI: doc.documentURIObject,
-                 originPrincipal: doc.nodePrincipal,
-                 triggeringPrincipal: doc.nodePrincipal });
-  },
-
-  // Open frame in a new tab.
-  openFrameInTab: function() {
-    var doc = this.target.ownerDocument;
-    var frameURL = doc.location.href;
-    var referrer = doc.referrer;
-    openLinkIn(frameURL, "tab",
-               { charset: doc.characterSet,
-                 referrerURI: referrer ? makeURI(referrer) : null });
-  },
-
-  // Reload clicked-in frame.
-  reloadFrame: function() {
-    this.target.ownerDocument.location.reload();
-  },
-
-  // Open clicked-in frame in its own window.
-  openFrame: function() {
-    var doc = this.target.ownerDocument;
-    var frameURL = doc.location.href;
-    var referrer = doc.referrer;
-    openLinkIn(frameURL, "window",
-               { charset: doc.characterSet,
-                 referrerURI: referrer ? makeURI(referrer) : null });
-  },
-
-  // Open clicked-in frame in the same window.
-  showOnlyThisFrame: function() {
-    var doc = this.target.ownerDocument;
-    var frameURL = doc.location.href;
-
-    urlSecurityCheck(frameURL, this.browser.contentPrincipal,
-                     Ci.nsIScriptSecurityManager.DISALLOW_SCRIPT);
-    var referrer = doc.referrer;
-    openUILinkIn(frameURL, "current", { disallowInheritPrincipal: true,
-                                        referrerURI: referrer ? makeURI(referrer) : null });
-  },
-
-  reload: function(event) {
-    BrowserReloadOrDuplicate(event);
-  },
-
-  // View Partial Source
-  viewPartialSource: function(aContext) {
-    let target = aContext == "mathml" ? this.target : null;
-    top.gViewSourceUtils.viewPartialSourceInBrowser(gBrowser.selectedBrowser, target);
-  },
-
-  // Open new "view source" window with the frame's URL.
-  viewFrameSource: function() {
-    BrowserViewSourceOfDocument(this.target.ownerDocument);
-  },
-
-  viewInfo: function() {
-    BrowserPageInfo(this.target.ownerDocument.defaultView.top.document);
-  },
-
-  viewImageInfo: function() {
-    BrowserPageInfo(this.target.ownerDocument.defaultView.top.document,
-                    "mediaTab", this.target);
-  },
-
-  viewFrameInfo: function() {
-    BrowserPageInfo(this.target.ownerDocument);
-  },
-
-  reloadImage: function(e) {
-    urlSecurityCheck(this.mediaURL,
-                     this.browser.contentPrincipal,
-                     Ci.nsIScriptSecurityManager.DISALLOW_SCRIPT);
-
-    if (this.target instanceof Ci.nsIImageLoadingContent)
-      this.target.forceReload();
-  },
-
-  // Change current window to the URL of the image, video, or audio.
-  viewMedia: function(e) {
-    var viewURL;
-    var doc = this.target.ownerDocument;
-    if (this.onCanvas) {
-      var target = this.target;
-      var win = doc.defaultView;
-      if (!win) {
-        Components.utils.reportError(
-            "View Image (on the <canvas> element):\n" +
-            "This feature cannot be used, because it hasn't found " + 
-            "an appropriate window.");
-      } else {
-        new Promise.resolve({then: function (resolve) {
-          target.toBlob((blob) => {
-            resolve(win.URL.createObjectURL(blob));
-          })
-        }}).then(function (blobURL) {
-          openUILink(blobURL, e, { disallowInheritPrincipal: true,
-                                   referrerURI: doc.documentURIObject });
-        }, Components.utils.reportError);
-      }
-    } else {
-      viewURL = this.mediaURL;
-      urlSecurityCheck(viewURL,
-                       this.browser.contentPrincipal,
-                       Ci.nsIScriptSecurityManager.DISALLOW_SCRIPT);
-      let doc = this.target.ownerDocument;
-      openUILink(viewURL, e, { disallowInheritPrincipal: true,
-                               referrerURI: doc.documentURIObject,
-                               forceAllowDataURI: true });
-    }
-  },
-
-  saveVideoFrameAsImage: function () {
-    let referrerURI = document.documentURIObject;
-    let isPrivate = PrivateBrowsingUtils.isBrowserPrivate(this.browser);
-
-    urlSecurityCheck(this.mediaURL, this.browser.contentPrincipal,
-                     Ci.nsIScriptSecurityManager.DISALLOW_SCRIPT);
-    let name = "";
-    try {
-      let uri = makeURI(this.mediaURL);
-      let url = uri.QueryInterface(Ci.nsIURL);
-      if (url.fileBaseName)
-        name = decodeURI(url.fileBaseName) + ".jpg";
-    } catch (e) { }
-    if (!name)
-      name = "snapshot.jpg";
-    var video = this.target;
-    var canvas = document.createElementNS("http://www.w3.org/1999/xhtml", "canvas");
-    canvas.width = video.videoWidth;
-    canvas.height = video.videoHeight;
-    var ctxDraw = canvas.getContext("2d");
-    ctxDraw.drawImage(video, 0, 0);
-    saveImageURL(canvas.toDataURL("image/jpeg", ""), name, "SaveImageTitle",
-                 true, false, referrerURI, null, null, null,
-                 isPrivate);
-  },
-
-  fullScreenVideo: function () {
-    let video = this.target;
-    if (document.mozFullScreenEnabled)
-      video.mozRequestFullScreen();
-  },
-
-  leaveDOMFullScreen: function() {
-    document.mozCancelFullScreen();
-  },
-
-  // Change current window to the URL of the background image.
-  viewBGImage: function(e) {
-    urlSecurityCheck(this.bgImageURL,
-                     this.browser.contentPrincipal,
-                     Ci.nsIScriptSecurityManager.DISALLOW_SCRIPT);
-    var doc = this.target.ownerDocument;
-    openUILink(this.bgImageURL, e, { disallowInheritPrincipal: true,
-                                     referrerURI: doc.documentURIObject });
-  },
-
-  disableSetDesktopBackground: function() {
-    // Disable the Set as Desktop Background menu item if we're still trying
-    // to load the image or the load failed.
-    if (!(this.target instanceof Ci.nsIImageLoadingContent))
-      return true;
-
-    if (("complete" in this.target) && !this.target.complete)
-      return true;
-
-    if (this.target.currentURI.schemeIs("javascript"))
-      return true;
-
-    var request = this.target
-                      .QueryInterface(Ci.nsIImageLoadingContent)
-                      .getRequest(Ci.nsIImageLoadingContent.CURRENT_REQUEST);
-    if (!request)
-      return true;
-
-    return false;
-  },
-
-  setDesktopBackground: function() {
-    // Paranoia: check disableSetDesktopBackground again, in case the
-    // image changed since the context menu was initiated.
-    if (this.disableSetDesktopBackground())
-      return;
-
-    urlSecurityCheck(this.target.currentURI.spec,
-                     this.target.ownerDocument.nodePrincipal);
-
-    // Confirm since it's annoying if you hit this accidentally.
-    const kDesktopBackgroundURL = 
-                  "chrome://browser/content/setDesktopBackground.xul";
-#ifdef XP_MACOSX
-    // On Mac, the Set Desktop Background window is not modal.
-    // Don't open more than one Set Desktop Background window.
-    var wm = Components.classes["@mozilla.org/appshell/window-mediator;1"]
-                       .getService(Components.interfaces.nsIWindowMediator);
-    var dbWin = wm.getMostRecentWindow("Shell:SetDesktopBackground");
-    if (dbWin) {
-      dbWin.gSetBackground.init(this.target);
-      dbWin.focus();
-    }
-    else {
-      openDialog(kDesktopBackgroundURL, "",
-                 "centerscreen,chrome,dialog=no,dependent,resizable=no",
-                 this.target);
-    }
-#else
-    // On non-Mac platforms, the Set Wallpaper dialog is modal.
-    openDialog(kDesktopBackgroundURL, "",
-               "centerscreen,chrome,dialog,modal,dependent",
-               this.target);
-#endif
-  },
-
-  // Save URL of clicked-on frame.
-  saveFrame: function () {
-    saveDocument(this.target.ownerDocument);
-  },
-
-  // Helper function to wait for appropriate MIME-type headers and
-  // then prompt the user with a file picker
-  saveHelper: function(linkURL, linkText, dialogTitle, bypassCache, doc,
-                       linkDownload) {
-    // canonical def in nsURILoader.h
-    const NS_ERROR_SAVE_LINK_AS_TIMEOUT = 0x805d0020;
-
-    // an object to proxy the data through to
-    // nsIExternalHelperAppService.doContent, which will wait for the
-    // appropriate MIME-type headers and then prompt the user with a
-    // file picker
-    function saveAsListener() {}
-    saveAsListener.prototype = {
-      extListener: null, 
-
-      onStartRequest: function saveLinkAs_onStartRequest(aRequest, aContext) {
-
-        // if the timer fired, the error status will have been caused by that,
-        // and we'll be restarting in onStopRequest, so no reason to notify
-        // the user
-        if (aRequest.status == NS_ERROR_SAVE_LINK_AS_TIMEOUT)
-          return;
-
-        timer.cancel();
-
-        // some other error occured; notify the user...
-        if (!Components.isSuccessCode(aRequest.status)) {
-          try {
-            const sbs = Cc["@mozilla.org/intl/stringbundle;1"].
-                        getService(Ci.nsIStringBundleService);
-            const bundle = sbs.createBundle(
-                    "chrome://mozapps/locale/downloads/downloads.properties");
-
-            const title = bundle.GetStringFromName("downloadErrorAlertTitle");
-            const msg = bundle.GetStringFromName("downloadErrorGeneric");
-
-            const promptSvc = Cc["@mozilla.org/embedcomp/prompt-service;1"].
-                              getService(Ci.nsIPromptService);
-            promptSvc.alert(doc.defaultView, title, msg);
-          } catch (ex) {}
-          return;
-        }
-
-        var extHelperAppSvc = 
-          Cc["@mozilla.org/uriloader/external-helper-app-service;1"].
-          getService(Ci.nsIExternalHelperAppService);
-        var channel = aRequest.QueryInterface(Ci.nsIChannel);
-        this.extListener = 
-          extHelperAppSvc.doContent(channel.contentType, aRequest, 
-                                    doc.defaultView, true);
-        this.extListener.onStartRequest(aRequest, aContext);
-      }, 
-
-      onStopRequest: function saveLinkAs_onStopRequest(aRequest, aContext, 
-                                                       aStatusCode) {
-        if (aStatusCode == NS_ERROR_SAVE_LINK_AS_TIMEOUT) {
-          // do it the old fashioned way, which will pick the best filename
-          // it can without waiting.
-          saveURL(linkURL, linkText, dialogTitle, bypassCache, false, doc.documentURIObject, doc);
-        }
-        if (this.extListener)
-          this.extListener.onStopRequest(aRequest, aContext, aStatusCode);
-      },
-
-      onDataAvailable: function saveLinkAs_onDataAvailable(aRequest, aContext,
-                                                           aInputStream,
-                                                           aOffset, aCount) {
-        this.extListener.onDataAvailable(aRequest, aContext, aInputStream,
-                                         aOffset, aCount);
-      }
-    }
-
-    function callbacks() {}
-    callbacks.prototype = {
-      getInterface: function sLA_callbacks_getInterface(aIID) {
-        if (aIID.equals(Ci.nsIAuthPrompt) || aIID.equals(Ci.nsIAuthPrompt2)) {
-          // If the channel demands authentication prompt, we must cancel it
-          // because the save-as-timer would expire and cancel the channel
-          // before we get credentials from user.  Both authentication dialog
-          // and save as dialog would appear on the screen as we fall back to
-          // the old fashioned way after the timeout.
-          timer.cancel();
-          channel.cancel(NS_ERROR_SAVE_LINK_AS_TIMEOUT);
-        }
-        throw Cr.NS_ERROR_NO_INTERFACE;
-      } 
-    }
-
-    // if it we don't have the headers after a short time, the user 
-    // won't have received any feedback from their click.  that's bad.  so
-    // we give up waiting for the filename. 
-    function timerCallback() {}
-    timerCallback.prototype = {
-      notify: function sLA_timer_notify(aTimer) {
-        channel.cancel(NS_ERROR_SAVE_LINK_AS_TIMEOUT);
-        return;
-      }
-    }
-
-    // setting up a new channel for 'right click - save link as ...'
-    var channel = NetUtil.newChannel({
-                    uri: makeURI(linkURL),
-                    loadingPrincipal: this.target.ownerDocument.nodePrincipal,
-                    contentPolicyType: Ci.nsIContentPolicy.TYPE_SAVEAS_DOWNLOAD,
-                    securityFlags: Ci.nsILoadInfo.SEC_ALLOW_CROSS_ORIGIN_DATA_INHERITS,
-                  });
-
-    if (linkDownload)
-      channel.contentDispositionFilename = linkDownload;
-    if (channel instanceof Ci.nsIPrivateBrowsingChannel) {
-      let docIsPrivate = PrivateBrowsingUtils.isWindowPrivate(doc.defaultView);
-      channel.setPrivate(docIsPrivate);
-    }
-    channel.notificationCallbacks = new callbacks();
-
-    let flags = Ci.nsIChannel.LOAD_CALL_CONTENT_SNIFFERS;
-
-    if (bypassCache)
-      flags |= Ci.nsIRequest.LOAD_BYPASS_CACHE;
-
-    if (channel instanceof Ci.nsICachingChannel)
-      flags |= Ci.nsICachingChannel.LOAD_BYPASS_LOCAL_CACHE_IF_BUSY;
-
-    channel.loadFlags |= flags;
-
-    if (channel instanceof Ci.nsIHttpChannel) {
-      channel.referrer = doc.documentURIObject;
-      if (channel instanceof Ci.nsIHttpChannelInternal)
-        channel.forceAllowThirdPartyCookie = true;
-    }
-
-    // fallback to the old way if we don't see the headers quickly 
-    var timeToWait = 
-      gPrefService.getIntPref("browser.download.saveLinkAsFilenameTimeout");
-    var timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
-    timer.initWithCallback(new timerCallback(), timeToWait,
-                           timer.TYPE_ONE_SHOT);
-
-    // kick off the channel with our proxy object as the listener
-    channel.asyncOpen2(new saveAsListener());
-  },
-
-  // Save URL of clicked-on link.
-  saveLink: function() {
-    var doc =  this.target.ownerDocument;
-    var linkText;
-    // If selected text is found to match valid URL pattern.
-    if (this.onPlainTextLink)
-      linkText = document.commandDispatcher.focusedWindow.getSelection().toString().trim();
-    else
-      linkText = this.linkText();
-    urlSecurityCheck(this.linkURL, doc.nodePrincipal);
-
-    this.saveHelper(this.linkURL, linkText, null, true, doc,
-                    this.linkDownload);
-  },
-
-  sendLink: function() {
-    // we don't know the title of the link so pass in an empty string
-    MailIntegration.sendMessage( this.linkURL, "" );
-  },
-
-  // Backwards-compatibility wrapper
-  saveImage : function() {
-    if (this.onCanvas || this.onImage)
-        this.saveMedia();
-  },
-
-  // Save URL of the clicked upon image, video, or audio.
-  saveMedia: function() {
-    var doc = this.target.ownerDocument;
-    let referrerURI = doc.documentURIObject;
-    let isPrivate = PrivateBrowsingUtils.isBrowserPrivate(this.browser);
-    if (this.onCanvas) {
-      // Bypass cache, since it's a blob: URL.
-      var target = this.target;
-      var win = doc.defaultView;
-      if (!win) {
-        Components.utils.reportError(
-            "Save Image As (on the <canvas> element):\n" +
-            "This feature cannot be used, because it hasn't found " + 
-            "an appropriate window.");
-      } else {
-        new Promise.resolve({then: function (resolve) {
-          target.toBlob((blob) => {
-          resolve(win.URL.createObjectURL(blob));
-        })
-        }}).then(function (blobURL) {
-          saveImageURL(blobURL, "canvas.png", "SaveImageTitle",
-                       true, false, referrerURI, null, null, null,
-                       isPrivate);
-        }, Components.utils.reportError);
-      }
-    } else if (this.onImage) {
-      urlSecurityCheck(this.mediaURL, doc.nodePrincipal);
-      saveImageURL(this.mediaURL, null, "SaveImageTitle",
-                   false, false, referrerURI, doc, null, null,
-                   isPrivate);
-    } else if (this.onVideo || this.onAudio) {
-      urlSecurityCheck(this.mediaURL, doc.nodePrincipal);
-      var dialogTitle = this.onVideo ? "SaveVideoTitle" : "SaveAudioTitle";
-      this.saveHelper(this.mediaURL, null, dialogTitle, false, doc, "");
-    }
-  },
-
-  // Backwards-compatibility wrapper
-  sendImage : function() {
-    if (this.onCanvas || this.onImage)
-        this.sendMedia();
-  },
-
-  sendMedia: function() {
-    MailIntegration.sendMessage(this.mediaURL, "");
-  },
-
-  playPlugin: function() {
-    gPluginHandler._showClickToPlayNotification(this.browser, this.target);
-  },
-
-  hidePlugin: function() {
-    gPluginHandler.hideClickToPlayOverlay(this.target);
-  },
-
-  // Generate email address and put it on clipboard.
-  copyEmail: function() {
-    // Copy the comma-separated list of email addresses only.
-    // There are other ways of embedding email addresses in a mailto:
-    // link, but such complex parsing is beyond us.
-    var url = this.linkURL;
-    var qmark = url.indexOf("?");
-    var addresses;
-
-    // 7 == length of "mailto:"
-    addresses = qmark > 7 ? url.substring(7, qmark) : url.substr(7);
-
-    // Let's try to unescape it using a character set
-    // in case the address is not ASCII.
-    try {
-      var characterSet = this.target.ownerDocument.characterSet;
-      const textToSubURI = Cc["@mozilla.org/intl/texttosuburi;1"].
-                           getService(Ci.nsITextToSubURI);
-      addresses = textToSubURI.unEscapeURIForUI(characterSet, addresses);
-    }
-    catch(ex) {
-      // Do nothing.
-    }
-
-    var clipboard = Cc["@mozilla.org/widget/clipboardhelper;1"].
-                    getService(Ci.nsIClipboardHelper);
-    clipboard.copyString(addresses, document);
-  },
-
-  ///////////////
-  // Utilities //
-  ///////////////
-
-  // Show/hide one item (specified via name or the item element itself).
-  showItem: function(aItemOrId, aShow) {
-    var item = aItemOrId.constructor == String ?
-      document.getElementById(aItemOrId) : aItemOrId;
-    if (item)
-      item.hidden = !aShow;
-  },
-
-  // Set given attribute of specified context-menu item.  If the
-  // value is null, then it removes the attribute (which works
-  // nicely for the disabled attribute).
-  setItemAttr: function(aID, aAttr, aVal ) {
-    var elem = document.getElementById(aID);
-    if (elem) {
-      if (aVal == null) {
-        // null indicates attr should be removed.
-        elem.removeAttribute(aAttr);
-      }
-      else {
-        // Set attr=val.
-        elem.setAttribute(aAttr, aVal);
-      }
-    }
-  },
-
-  // Set context menu attribute according to like attribute of another node
-  // (such as a broadcaster).
-  setItemAttrFromNode: function(aItem_id, aAttr, aOther_id) {
-    var elem = document.getElementById(aOther_id);
-    if (elem && elem.getAttribute(aAttr) == "true")
-      this.setItemAttr(aItem_id, aAttr, "true");
-    else
-      this.setItemAttr(aItem_id, aAttr, null);
-  },
-
-  // Temporary workaround for DOM api not yet implemented by XUL nodes.
-  cloneNode: function(aItem) {
-    // Create another element like the one we're cloning.
-    var node = document.createElement(aItem.tagName);
-
-    // Copy attributes from argument item to the new one.
-    var attrs = aItem.attributes;
-    for (var i = 0; i < attrs.length; i++) {
-      var attr = attrs.item(i);
-      node.setAttribute(attr.nodeName, attr.nodeValue);
-    }
-
-    // Voila!
-    return node;
-  },
-
-  // Generate fully qualified URL for clicked-on link.
-  getLinkURL: function() {
-    var href = this.link.href;  
-    if (href)
-      return href;
-
-    href = this.link.getAttributeNS("http://www.w3.org/1999/xlink",
-                                    "href");
-
-    if (!href || !href.match(/\S/)) {
-      // Without this we try to save as the current doc,
-      // for example, HTML case also throws if empty
-      throw "Empty href";
-    }
-
-    return makeURLAbsolute(this.link.baseURI, href);
-  },
-
-  getLinkURI: function() {
-    try {
-      return makeURI(this.linkURL);
-    }
-    catch (ex) {
-     // e.g. empty URL string
-    }
-
-    return null;
-  },
-
-  getLinkProtocol: function() {
-    if (this.linkURI)
-      return this.linkURI.scheme; // can be |undefined|
-
-    return null;
-  },
-
-  // Get text of link.
-  linkText: function() {
-    var text = gatherTextUnder(this.link);
-    if (!text || !text.match(/\S/)) {
-      text = this.link.getAttribute("title");
-      if (!text || !text.match(/\S/)) {
-        text = this.link.getAttribute("alt");
-        if (!text || !text.match(/\S/))
-          text = this.linkURL;
-      }
-    }
-
-    return text;
-  },
-
-  // Returns true if anything is selected.
-  isContentSelection: function() {
-    return !document.commandDispatcher.focusedWindow.getSelection().isCollapsed;
-  },
-
-  toString: function () {
-    return "contextMenu.target     = " + this.target + "\n" +
-           "contextMenu.onImage    = " + this.onImage + "\n" +
-           "contextMenu.onLink     = " + this.onLink + "\n" +
-           "contextMenu.link       = " + this.link + "\n" +
-           "contextMenu.inFrame    = " + this.inFrame + "\n" +
-           "contextMenu.hasBGImage = " + this.hasBGImage + "\n";
-  },
-
-  isDisabledForEvents: function(aNode) {
-    let ownerDoc = aNode.ownerDocument;
-    return ownerDoc.defaultView &&
-           ownerDoc.defaultView
-              .QueryInterface(Components.interfaces.nsIInterfaceRequestor)
-              .getInterface(Components.interfaces.nsIDOMWindowUtils)
-              .isNodeDisabledForEvents(aNode);
-  },
-
-  isTargetATextBox: function(node) {
-    if (node instanceof HTMLInputElement)
-      return node.mozIsTextField(false);
-
-    return (node instanceof HTMLTextAreaElement);
-  },
-
-  isTargetAKeywordField: function(aNode) {
-    if (!(aNode instanceof HTMLInputElement))
-      return false;
-
-    var form = aNode.form;
-    if (!form || aNode.type == "password")
-      return false;
-
-    var method = form.method.toUpperCase();
-
-    // These are the following types of forms we can create keywords for:
-    //
-    // method   encoding type       can create keyword
-    // GET      *                                 YES
-    //          *                                 YES
-    // POST                                       YES
-    // POST     application/x-www-form-urlencoded YES
-    // POST     text/plain                        NO (a little tricky to do)
-    // POST     multipart/form-data               NO
-    // POST     everything else                   YES
-    return (method == "GET" || method == "") ||
-           (form.enctype != "text/plain") && (form.enctype != "multipart/form-data");
-  },
-
-  // Determines whether or not the separator with the specified ID should be
-  // shown or not by determining if there are any non-hidden items between it
-  // and the previous separator.
-  shouldShowSeparator: function (aSeparatorID) {
-    var separator = document.getElementById(aSeparatorID);
-    if (separator) {
-      var sibling = separator.previousSibling;
-      while (sibling && sibling.localName != "menuseparator") {
-        if (!sibling.hidden)
-          return true;
-        sibling = sibling.previousSibling;
-      }
-    }
-    return false;
-  },
-
-  addDictionaries: function() {
-    var uri = formatURL("browser.dictionaries.download.url", true);
-
-    var locale = "-";
-    try {
-      locale = gPrefService.getComplexValue("intl.accept_languages",
-                                            Ci.nsIPrefLocalizedString).data;
-    }
-    catch (e) { }
-
-    var version = "-";
-    try {
-      version = Cc["@mozilla.org/xre/app-info;1"].
-                getService(Ci.nsIXULAppInfo).version;
-    }
-    catch (e) { }
-
-    uri = uri.replace(/%LOCALE%/, escape(locale)).replace(/%VERSION%/, version);
-
-    var newWindowPref = gPrefService.getIntPref("browser.link.open_newwindow");
-    var where = newWindowPref == 3 ? "tab" : "window";
-
-    openUILinkIn(uri, where);
-  },
-
-  bookmarkThisPage: function CM_bookmarkThisPage() {
-    window.top.PlacesCommandHook.bookmarkPage(this.browser, PlacesUtils.bookmarksMenuFolderId, true);
-  },
-
-  bookmarkLink: function CM_bookmarkLink() {
-    var linkText;
-    // If selected text is found to match valid URL pattern.
-    if (this.onPlainTextLink)
-      linkText = document.commandDispatcher.focusedWindow.getSelection().toString().trim();
-    else
-      linkText = this.linkText();
-    window.top.PlacesCommandHook.bookmarkLink(PlacesUtils.bookmarksMenuFolderId, this.linkURL,
-                                              linkText);
-  },
-
-  addBookmarkForFrame: function CM_addBookmarkForFrame() {
-    var doc = this.target.ownerDocument;
-    var uri = doc.documentURIObject;
-
-    var itemId = PlacesUtils.getMostRecentBookmarkForURI(uri);
-    if (itemId == -1) {
-      var title = doc.title;
-      var description = PlacesUIUtils.getDescriptionFromDocument(doc);
-      PlacesUIUtils.showBookmarkDialog({ action: "add"
-                                       , type: "bookmark"
-                                       , uri: uri
-                                       , title: title
-                                       , description: description
-                                       , hiddenRows: [ "description"
-                                                     , "location"
-                                                     , "loadInSidebar"
-                                                     , "keyword" ]
-                                       }, window.top);
-    }
-    else {
-      PlacesUIUtils.showBookmarkDialog({ action: "edit"
-                                       , type: "bookmark"
-                                       , itemId: itemId
-                                       }, window.top);
-    }
-  },
-
-  savePageAs: function CM_savePageAs() {
-    saveDocument(this.browser.contentDocument);
-  },
-
-  sendPage: function CM_sendPage() {
-    MailIntegration.sendLinkForWindow(this.browser.contentWindow);  
-  },
-
-  printFrame: function CM_printFrame() {
-    PrintUtils.print(this.target.ownerDocument.defaultView);
-  },
-
-  switchPageDirection: function CM_switchPageDirection() {
-    SwitchDocumentDirection(this.browser.contentWindow);
-  },
-
-  mediaCommand : function CM_mediaCommand(command, data) {
-    var media = this.target;
-
-    switch (command) {
-      case "play":
-        media.play();
-        break;
-      case "pause":
-        media.pause();
-        break;
-      case "loop":
-        media.loop = !media.loop;
-        break;
-      case "mute":
-        media.muted = true;
-        break;
-      case "unmute":
-        media.muted = false;
-        break;
-      case "playbackRate":
-        media.playbackRate = data;
-        break;
-      case "hidecontrols":
-        media.removeAttribute("controls");
-        break;
-      case "showcontrols":
-        media.setAttribute("controls", "true");
-        break;
-      case "hidestats":
-      case "showstats":
-        var event = media.ownerDocument.createEvent("CustomEvent");
-        event.initCustomEvent("media-showStatistics", false, true, command == "showstats");
-        media.dispatchEvent(event);
-        break;
-    }
-  },
-
-  copyMediaLocation : function () {
-    var clipboard = Cc["@mozilla.org/widget/clipboardhelper;1"].
-                    getService(Ci.nsIClipboardHelper);
-    clipboard.copyString(this.mediaURL, document);
-  },
-
-  get imageURL() {
-    if (this.onImage)
-      return this.mediaURL;
-    return "";
-  },
-
-  // Formats the 'Search <engine> for "<selection or link text>"' context menu.
-  formatSearchContextItem: function() {
-    var menuItem = document.getElementById("context-searchselect");
-    var selectedText = this.isTextSelected ? this.textSelected : this.linkText();
-
-    // Store searchTerms in context menu item so we know what to search onclick
-    menuItem.searchTerms = selectedText;
-
-    if (selectedText.length > 15)
-      selectedText = selectedText.substr(0,15) + this.ellipsis;
-
-    // Use the current engine if the search bar is visible, the default
-    // engine otherwise.
-    var engineName = "";
-    var ss = Cc["@mozilla.org/browser/search-service;1"].
-             getService(Ci.nsIBrowserSearchService);
-    if (isElementVisible(BrowserSearch.searchBar))
-      engineName = ss.currentEngine.name;
-    else
-      engineName = ss.defaultEngine.name;
-
-    // format "Search <engine> for <selection>" string to show in menu
-    var menuLabel = gNavigatorBundle.getFormattedString("contextMenuSearch",
-                                                        [engineName,
-                                                         selectedText]);
-    menuItem.label = menuLabel;
-    menuItem.accessKey = gNavigatorBundle.getString("contextMenuSearch.accesskey");
-  }
-};