| // Copyright (c) 2011 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_VIEWS_IME_INPUT_METHOD_BASE_H_ |
| #define UI_VIEWS_IME_INPUT_METHOD_BASE_H_ |
| |
| #include "base/basictypes.h" |
| #include "base/compiler_specific.h" |
| #include "ui/views/focus/focus_manager.h" |
| #include "ui/views/ime/input_method.h" |
| #include "ui/views/ime/input_method_delegate.h" |
| |
| namespace gfx { |
| class Rect; |
| } |
| |
| namespace ui { |
| class KeyEvent; |
| class TextInputClient; |
| } |
| |
| namespace views { |
| |
| class View; |
| |
| // A helper class providing functionalities shared among InputMethod |
| // implementations. |
| class VIEWS_EXPORT InputMethodBase : NON_EXPORTED_BASE(public InputMethod), |
| public FocusChangeListener { |
| public: |
| InputMethodBase(); |
| virtual ~InputMethodBase(); |
| |
| // Overridden from InputMethod. |
| virtual void set_delegate(internal::InputMethodDelegate* delegate) OVERRIDE; |
| |
| // If a derived class overrides this method, it should call parent's |
| // implementation first. |
| virtual void Init(Widget* widget) OVERRIDE; |
| |
| // If a derived class overrides this method, it should call parent's |
| // implementation first, to make sure |widget_focused_| flag can be updated |
| // correctly. |
| virtual void OnFocus() OVERRIDE; |
| |
| // If a derived class overrides this method, it should call parent's |
| // implementation first, to make sure |widget_focused_| flag can be updated |
| // correctly. |
| virtual void OnBlur() OVERRIDE; |
| |
| // If a derived class overrides this method, it should call parent's |
| // implementation. |
| virtual void OnTextInputTypeChanged(View* view) OVERRIDE; |
| |
| virtual ui::TextInputClient* GetTextInputClient() const OVERRIDE; |
| virtual ui::TextInputType GetTextInputType() const OVERRIDE; |
| virtual bool IsMock() const OVERRIDE; |
| |
| // Overridden from FocusChangeListener. |
| virtual void OnWillChangeFocus(View* focused_before, View* focused) OVERRIDE; |
| virtual void OnDidChangeFocus(View* focused_before, View* focused) OVERRIDE; |
| |
| protected: |
| // Getters and setters of properties. |
| internal::InputMethodDelegate* delegate() const { return delegate_; } |
| Widget* widget() const { return widget_; } |
| bool widget_focused() const { return widget_focused_; } |
| View* GetFocusedView() const; |
| |
| // Checks if the given View is focused. Returns true only if the View and |
| // the Widget are both focused. |
| bool IsViewFocused(View* view) const; |
| |
| // Checks if the focused text input client's text input type is |
| // ui::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 ui::TEXT_INPUT_TYPE_NONE. |
| void OnInputMethodChanged() const; |
| |
| // Convenience method to call delegate_->DispatchKeyEventPostIME(). |
| void DispatchKeyEventPostIME(const ui::KeyEvent& key) const; |
| |
| // Gets the current text input client's caret bounds in Widget's coordinates. |
| // Returns false if the current text input client doesn't support text input. |
| bool GetCaretBoundsInWidget(gfx::Rect* rect) const; |
| |
| private: |
| internal::InputMethodDelegate* delegate_; |
| Widget* widget_; |
| |
| // Indicates if the top-level widget is focused or not. |
| bool widget_focused_; |
| |
| DISALLOW_COPY_AND_ASSIGN(InputMethodBase); |
| }; |
| |
| } // namespace views |
| |
| #endif // UI_VIEWS_IME_INPUT_METHOD_BASE_H_ |