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