It is time.

ui/base/ime/input_method_base.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef UI_BASE_IME_INPUT_METHOD_BASE_H_
-#define UI_BASE_IME_INPUT_METHOD_BASE_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/weak_ptr.h"
-#include "base/observer_list.h"
-#include "ui/base/ime/input_method.h"
-#include "ui/base/ui_base_export.h"
-
-namespace gfx {
-class Rect;
-}  // namespace gfx
-
-namespace ui {
-
-class InputMethodObserver;
-class KeyEvent;
-class TextInputClient;
-
-// A helper class providing functionalities shared among ui::InputMethod
-// implementations.
-class UI_BASE_EXPORT InputMethodBase
-   : NON_EXPORTED_BASE(public InputMethod),
-     public base::SupportsWeakPtr<InputMethodBase> {
- public:
-  InputMethodBase();
-  ~InputMethodBase() override;
-
-  // Overriden from InputMethod.
-  void SetDelegate(internal::InputMethodDelegate* delegate) override;
-  void Init(bool focused) override;
-  // If a derived class overrides OnFocus()/OnBlur(), it should call parent's
-  // implementation first, to make sure |system_toplevel_window_focused_| flag
-  // can be updated correctly.
-  void OnFocus() override;
-  void OnBlur() override;
-  void SetFocusedTextInputClient(TextInputClient* client) override;
-  void DetachTextInputClient(TextInputClient* client) override;
-  TextInputClient* GetTextInputClient() const override;
-
-  // If a derived class overrides this method, it should call parent's
-  // implementation.
-  void OnTextInputTypeChanged(const TextInputClient* client) override;
-
-  TextInputType GetTextInputType() const override;
-  TextInputMode GetTextInputMode() const override;
-  bool CanComposeInline() const override;
-  void ShowImeIfNeeded() override;
-
-  void AddObserver(InputMethodObserver* observer) override;
-  void RemoveObserver(InputMethodObserver* observer) override;
-
- protected:
-  virtual void OnWillChangeFocusedClient(TextInputClient* focused_before,
-                                         TextInputClient* focused) {}
-  virtual void OnDidChangeFocusedClient(TextInputClient* focused_before,
-                                        TextInputClient* focused) {}
-
-  // Returns true if |client| is currently focused.
-  bool IsTextInputClientFocused(const TextInputClient* client);
-
-  // Checks if the focused text input client's text input type is
-  // TEXT_INPUT_TYPE_NONE. Also returns true if there is no focused text
-  // input client.
-  bool IsTextInputTypeNone() const;
-
-  // Convenience method to call the focused text input client's
-  // OnInputMethodChanged() method. It'll only take effect if the current text
-  // input type is not TEXT_INPUT_TYPE_NONE.
-  void OnInputMethodChanged() const;
-
-  // Convenience method to call delegate_->DispatchKeyEventPostIME().
-  // Returns true if the event was processed
-  bool DispatchKeyEventPostIME(const ui::KeyEvent& event) const;
-
-  // Convenience method to notify all observers of TextInputClient changes.
-  void NotifyTextInputStateChanged(const TextInputClient* client);
-
-  // Interface for for signalling candidate window events.
-  // See also *Callback functions below. To avoid reentrancy issue that
-  // TextInputClient manipulates IME state during even handling, these methods
-  // defer sending actual signals to renderer.
-  void OnCandidateWindowShown();
-  void OnCandidateWindowUpdated();
-  void OnCandidateWindowHidden();
-
-  bool system_toplevel_window_focused() const {
-    return system_toplevel_window_focused_;
-  }
-
- private:
-  void SetFocusedTextInputClientInternal(TextInputClient* client);
-
-  // Deferred callbacks for signalling TextInputClient about candidate window
-  // appearance changes.
-  void CandidateWindowShownCallback();
-  void CandidateWindowUpdatedCallback();
-  void CandidateWindowHiddenCallback();
-
-  internal::InputMethodDelegate* delegate_;
-  TextInputClient* text_input_client_;
-
-  ObserverList<InputMethodObserver> observer_list_;
-
-  bool system_toplevel_window_focused_;
-
-  DISALLOW_COPY_AND_ASSIGN(InputMethodBase);
-};
-
-}  // namespace ui
-
-#endif  // UI_BASE_IME_INPUT_METHOD_BASE_H_