dom/xul/nsXULCommandDispatcher.h
author Dimi Lee <dlee@mozilla.com>
Sat, 08 Aug 2020 06:00:00 +0000
changeset 543991 fa0dbdf15f291e814b4854d515d7ef3e4548b7fb
parent 452878 54f18c480711e3cee577e4174f6def86ec2b2a05
permissions -rw-r--r--
Bug 1658010 - Add null pointer check before notifying content block event r=xeonchen Differential Revision: https://phabricator.services.mozilla.com/D86421

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*

   This is the focus manager for XUL documents.

*/

#ifndef nsXULCommandDispatcher_h__
#define nsXULCommandDispatcher_h__

#include "nsCOMPtr.h"
#include "nsIDOMXULCommandDispatcher.h"
#include "nsWeakReference.h"
#include "nsString.h"
#include "nsCycleCollectionParticipant.h"
#include "mozilla/RefPtr.h"

class nsPIWindowRoot;

namespace mozilla {
namespace dom {
class Document;
class Element;
}  // namespace dom
}  // namespace mozilla

class nsXULCommandDispatcher : public nsIDOMXULCommandDispatcher,
                               public nsSupportsWeakReference {
 public:
  explicit nsXULCommandDispatcher(mozilla::dom::Document* aDocument);

  // nsISupports
  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsXULCommandDispatcher,
                                           nsIDOMXULCommandDispatcher)

  // nsIDOMXULCommandDispatcher interface
  NS_DECL_NSIDOMXULCOMMANDDISPATCHER

  void Disconnect();

 protected:
  virtual ~nsXULCommandDispatcher();

  already_AddRefed<nsPIWindowRoot> GetWindowRoot();

  mozilla::dom::Element* GetRootFocusedContentAndWindow(
      nsPIDOMWindowOuter** aWindow);

  RefPtr<mozilla::dom::Document> mDocument;

  class Updater {
   public:
    Updater(mozilla::dom::Element* aElement, const nsAString& aEvents,
            const nsAString& aTargets)
        : mElement(aElement),
          mEvents(aEvents),
          mTargets(aTargets),
          mNext(nullptr) {}

    RefPtr<mozilla::dom::Element> mElement;
    nsString mEvents;
    nsString mTargets;
    Updater* mNext;
  };

  Updater* mUpdaters;

  bool Matches(const nsString& aList, const nsAString& aElement);

  bool mLocked;
  nsTArray<nsString> mPendingUpdates;
};

#endif  // nsXULCommandDispatcher_h__