ash/ime/input_method_menu_manager.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 #include "ash/ash_export.h"
   6
   7 #include "ash/ime/input_method_menu_item.h"
   8 #include "base/observer_list.h"
   9
  10 #ifndef ASH_IME_INPUT_METHOD_MENU_MANAGER_H_
  11 #define ASH_IME_INPUT_METHOD_MENU_MANAGER_H_
  12
  13 template<typename Type> struct DefaultSingletonTraits;
  14
  15 namespace ash {
  16 namespace ime {
  17
  18 class ASH_EXPORT InputMethodMenuManager {
  19 public:
  20   class Observer {
  21    public:
  22     virtual ~Observer() {}
  23
  24     // Called when the list of menu items is changed.
  25     virtual void InputMethodMenuItemChanged(
  26         InputMethodMenuManager* manager) = 0;
  27   };
  28
  29   ~InputMethodMenuManager();
  30
  31   void AddObserver(Observer* observer);
  32   void RemoveObserver(Observer* observer);
  33
  34   // Obtains the singleton instance.
  35   static InputMethodMenuManager* GetInstance();
  36
  37   // Sets the list of input method menu items. The list could be empty().
  38   void SetCurrentInputMethodMenuItemList(
  39       const InputMethodMenuItemList& menu_list);
  40
  41   // Gets the list of input method menu items. The list could be empty().
  42   InputMethodMenuItemList GetCurrentInputMethodMenuItemList() const;
  43
  44   // True if the key exists in the menu_list_.
  45   bool HasInputMethodMenuItemForKey(const std::string& key) const;
  46
  47  private:
  48   InputMethodMenuManager();
  49
  50   // For Singleton to be able to construct an instance.
  51   friend struct DefaultSingletonTraits<InputMethodMenuManager>;
  52
  53   // Menu item list of the input method.  This is set by extension IMEs.
  54   InputMethodMenuItemList menu_list_;
  55
  56   // Observers who will be notified when menu changes.
  57   ObserverList<Observer> observers_;
  58
  59   DISALLOW_COPY_AND_ASSIGN(InputMethodMenuManager);
  60 };
  61
  62 }  // namespace ime
  63 }  // namespace ash
  64
  65 #endif // ASH_IME_INPUT_METHOD_MENU_MANAGER_H_