ui/wm/core/nested_accelerator_controller.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_WM_CORE_NESTED_ACCELERATOR_CONTROLLER_H_
   6 #define UI_WM_CORE_NESTED_ACCELERATOR_CONTROLLER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/message_loop/message_loop.h"
  10 #include "ui/wm/public/dispatcher_client.h"
  11 #include "ui/wm/wm_export.h"
  12
  13 namespace wm {
  14
  15 class NestedAcceleratorDelegate;
  16 class NestedAcceleratorDispatcher;
  17
  18 // Creates a dispatcher which wraps another dispatcher.
  19 // The outer dispatcher runs first and performs ash specific handling.
  20 // If it does not consume the event it forwards the event to the nested
  21 // dispatcher.
  22 class WM_EXPORT NestedAcceleratorController
  23     : public aura::client::DispatcherClient {
  24  public:
  25   explicit NestedAcceleratorController(NestedAcceleratorDelegate* delegate);
  26   ~NestedAcceleratorController() override;
  27
  28   // aura::client::DispatcherClient:
  29   void PrepareNestedLoopClosures(base::MessagePumpDispatcher* dispatcher,
  30                                  base::Closure* run_closure,
  31                                  base::Closure* quit_closure) override;
  32
  33  private:
  34   void RunNestedMessageLoop(scoped_ptr<base::RunLoop> run_loop,
  35                             scoped_ptr<NestedAcceleratorDispatcher> dispatcher);
  36   void QuitNestedMessageLoop(const base::Closure& quit_runloop);
  37
  38   scoped_ptr<NestedAcceleratorDispatcher> accelerator_dispatcher_;
  39   scoped_ptr<NestedAcceleratorDelegate> dispatcher_delegate_;
  40
  41   DISALLOW_COPY_AND_ASSIGN(NestedAcceleratorController);
  42 };
  43
  44 }  // namespace wm
  45
  46 #endif  // UI_WM_CORE_NESTED_ACCELERATOR_CONTROLLER_H_