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