ui/base/ime/text_input_focus_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 #ifndef UI_BASE_IME_TEXT_INPUT_FOCUS_MANAGER_H_
   6 #define UI_BASE_IME_TEXT_INPUT_FOCUS_MANAGER_H_
   7
   8 #include "base/macros.h"
   9 #include "base/threading/thread_checker.h"
  10 #include "ui/base/ime/ui_base_ime_export.h"
  11
  12 template <typename T> struct DefaultSingletonTraits;
  13
  14 namespace ui {
  15
  16 class TextInputClient;
  17
  18 // Manages the focused TextInputClient across windows and their contents.
  19 class UI_BASE_IME_EXPORT TextInputFocusManager {
  20  public:
  21   static TextInputFocusManager* GetInstance();
  22
  23   // Returns the currently focused text input client or NULL.
  24   TextInputClient* GetFocusedTextInputClient();
  25
  26   // Changes the text input focus to |text_input_client|.
  27   void FocusTextInputClient(TextInputClient* text_input_client);
  28
  29   // Removes the text input focus from |text_input_client|.  If
  30   // |text_input_client| was not focused, does nothing.
  31   void BlurTextInputClient(TextInputClient* text_input_client);
  32
  33  private:
  34   friend struct DefaultSingletonTraits<TextInputFocusManager>;
  35
  36   TextInputFocusManager();
  37   ~TextInputFocusManager();
  38
  39   TextInputClient* focused_text_input_client_;
  40   base::ThreadChecker thread_checker_;
  41
  42   DISALLOW_COPY_AND_ASSIGN(TextInputFocusManager);
  43 };
  44
  45 }  // namespace ui
  46
  47 #endif  // UI_BASE_IME_TEXT_INPUT_FOCUS_MANAGER_H_