components/view_manager/event_dispatcher.h

   1 // Copyright 2015 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 COMPONENTS_VIEW_MANAGER_EVENT_DISPATCHER_H_
   6 #define COMPONENTS_VIEW_MANAGER_EVENT_DISPATCHER_H_
   7
   8 #include <set>
   9
  10 #include "base/basictypes.h"
  11 #include "components/native_viewport/public/interfaces/native_viewport.mojom.h"
  12 #include "components/window_manager/public/interfaces/window_manager_internal.mojom.h"
  13
  14 namespace view_manager {
  15
  16 class ConnectionManager;
  17
  18 // Handles dispatching events to the right location as well as updating focus.
  19 class EventDispatcher : public mojo::NativeViewportEventDispatcher {
  20  public:
  21   explicit EventDispatcher(ConnectionManager* connection_manager);
  22   ~EventDispatcher() override;
  23
  24   void AddAccelerator(mojo::KeyboardCode keyboard_code, mojo::EventFlags flags);
  25   void RemoveAccelerator(mojo::KeyboardCode keyboard_code,
  26                          mojo::EventFlags flags);
  27
  28   // NativeViewportEventDispatcher:
  29   void OnEvent(mojo::EventPtr event, const OnEventCallback& callback) override;
  30
  31  private:
  32   struct Accelerator {
  33     Accelerator(mojo::KeyboardCode keyboard_code, mojo::EventFlags flags)
  34         : keyboard_code(keyboard_code), flags(flags) {}
  35
  36     // So we can use this in a set.
  37     bool operator<(const Accelerator& other) const {
  38       if (keyboard_code == other.keyboard_code)
  39         return flags < other.flags;
  40       return keyboard_code < other.keyboard_code;
  41     }
  42
  43     mojo::KeyboardCode keyboard_code;
  44     mojo::EventFlags flags;
  45   };
  46
  47   ConnectionManager* connection_manager_;
  48
  49   std::set<Accelerator> accelerators_;
  50
  51   DISALLOW_COPY_AND_ASSIGN(EventDispatcher);
  52 };
  53
  54 }  // namespace view_manager
  55
  56 #endif  // COMPONENTS_VIEW_MANAGER_EVENT_DISPATCHER_H_