widget/windows/WinTextEventDispatcherListener.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef WinTextEventDispatcherListener_h_
   7 #define WinTextEventDispatcherListener_h_
   8
   9 #include "mozilla/Attributes.h"
  10 #include "mozilla/StaticPtr.h"
  11 #include "mozilla/TextEventDispatcherListener.h"
  12
  13 namespace mozilla {
  14 namespace widget {
  15
  16 /**
  17  * On Windows, it's enough TextEventDispatcherListener to be a singleton
  18  * because we have only one input context per process (IMM can create
  19  * multiple IM context but we don't support such behavior).
  20  */
  21
  22 class WinTextEventDispatcherListener final
  23     : public TextEventDispatcherListener {
  24  public:
  25   static WinTextEventDispatcherListener* GetInstance();
  26   static void Shutdown();
  27
  28   NS_DECL_ISUPPORTS
  29
  30   NS_IMETHOD NotifyIME(TextEventDispatcher* aTextEventDispatcher,
  31                        const IMENotification& aNotification) override;
  32   NS_IMETHOD_(IMENotificationRequests) GetIMENotificationRequests() override;
  33   NS_IMETHOD_(void)
  34   OnRemovedFrom(TextEventDispatcher* aTextEventDispatcher) override;
  35   NS_IMETHOD_(void)
  36   WillDispatchKeyboardEvent(TextEventDispatcher* aTextEventDispatcher,
  37                             WidgetKeyboardEvent& aKeyboardEvent,
  38                             uint32_t aIndexOfKeypress, void* aData) override;
  39
  40  private:
  41   WinTextEventDispatcherListener();
  42   virtual ~WinTextEventDispatcherListener();
  43
  44   static StaticRefPtr<WinTextEventDispatcherListener> sInstance;
  45 };
  46
  47 }  // namespace widget
  48 }  // namespace mozilla
  49
  50 #endif  // #ifndef WinTextEventDispatcherListener_h_