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 namespace base {
  13 template <typename Type>
  14 struct DefaultSingletonTraits;
  15 }  // namespace base
  16
  17 namespace ui {
  18 namespace ime {
  19
  20 class UI_CHROMEOS_EXPORT InputMethodMenuManager {
  21 public:
  22   class Observer {
  23    public:
  24     virtual ~Observer() {}
  25
  26     // Called when the list of menu items is changed.
  27     virtual void InputMethodMenuItemChanged(
  28         InputMethodMenuManager* manager) = 0;
  29   };
  30
  31   ~InputMethodMenuManager();
  32
  33   void AddObserver(Observer* observer);
  34   void RemoveObserver(Observer* observer);
  35
  36   // Obtains the singleton instance.
  37   static InputMethodMenuManager* GetInstance();
  38
  39   // Sets the list of input method menu items. The list could be empty().
  40   void SetCurrentInputMethodMenuItemList(
  41       const InputMethodMenuItemList& menu_list);
  42
  43   // Gets the list of input method menu items. The list could be empty().
  44   InputMethodMenuItemList GetCurrentInputMethodMenuItemList() const;
  45
  46   // True if the key exists in the menu_list_.
  47   bool HasInputMethodMenuItemForKey(const std::string& key) const;
  48
  49  private:
  50   InputMethodMenuManager();
  51
  52   // For Singleton to be able to construct an instance.
  53   friend struct base::DefaultSingletonTraits<InputMethodMenuManager>;
  54
  55   // Menu item list of the input method.  This is set by extension IMEs.
  56   InputMethodMenuItemList menu_list_;
  57
  58   // Observers who will be notified when menu changes.
  59   base::ObserverList<Observer> observers_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(InputMethodMenuManager);
  62 };
  63
  64 }  // namespace ime
  65 }  // namespace ui
  66
  67 #endif // UI_CHROMEOS_IME_INPUT_METHOD_MENU_MANAGER_H_