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