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// 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;
}
namespace views {
// A helper that provides functionality shared by InputMethod implementations.
class VIEWS_EXPORT InputMethodBase : public InputMethod,
public FocusChangeListener {
public:
InputMethodBase();
~InputMethodBase() override;
// Overridden from InputMethod.
void SetDelegate(internal::InputMethodDelegate* delegate) override;
void Init(Widget* widget) override;
void OnTextInputTypeChanged(View* view) override;
ui::TextInputClient* GetTextInputClient() const override;
ui::TextInputType GetTextInputType() const override;
// Overridden from FocusChangeListener.
void OnWillChangeFocus(View* focused_before, View* focused) override;
void OnDidChangeFocus(View* focused_before, View* focused) override;
protected:
internal::InputMethodDelegate* delegate() const { return delegate_; }
Widget* widget() const { return widget_; }
View* GetFocusedView() const;
// Returns true only if the View is focused and its Widget is active.
bool IsViewFocused(View* view) const;
// Returns true if there is no focused text input client or its type is none.
bool IsTextInputTypeNone() const;
// Calls the focused text input client's OnInputMethodChanged() method.
// This has no effect if the text input type is 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;
// Removes any state installed on |widget_| and NULLs it out. Use if the
// widget is in a state such that it should no longer be used (such as when
// this is in its destructor).
void DetachFromWidget();
private:
internal::InputMethodDelegate* delegate_;
Widget* widget_;
DISALLOW_COPY_AND_ASSIGN(InputMethodBase);
};
} // namespace views
#endif // UI_VIEWS_IME_INPUT_METHOD_BASE_H_
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