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// 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_VIEWS_IME_INPUT_METHOD_BRIDGE_H_
#define UI_VIEWS_IME_INPUT_METHOD_BRIDGE_H_
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "ui/base/ime/text_input_client.h"
#include "ui/gfx/rect.h"
#include "ui/views/ime/input_method_base.h"
namespace ui {
class InputMethod;
} // namespace ui
namespace views {
class View;
// A "bridge" InputMethod implementation for views top-level widgets, which just
// sends/receives IME related events to/from a system-wide ui::InputMethod
// object.
class InputMethodBridge : public InputMethodBase,
public ui::TextInputClient {
public:
// |shared_input_method| indicates if |host| is shared among other top level
// widgets.
InputMethodBridge(internal::InputMethodDelegate* delegate,
ui::InputMethod* host,
bool shared_input_method);
virtual ~InputMethodBridge();
// Overridden from InputMethod:
virtual void OnFocus() OVERRIDE;
virtual void OnBlur() OVERRIDE;
virtual bool OnUntranslatedIMEMessage(const base::NativeEvent& event,
NativeEventResult* result) OVERRIDE;
virtual void DispatchKeyEvent(const ui::KeyEvent& key) OVERRIDE;
virtual void OnTextInputTypeChanged(View* view) OVERRIDE;
virtual void OnCaretBoundsChanged(View* view) OVERRIDE;
virtual void CancelComposition(View* view) OVERRIDE;
virtual void OnInputLocaleChanged() OVERRIDE;
virtual std::string GetInputLocale() OVERRIDE;
virtual base::i18n::TextDirection GetInputTextDirection() OVERRIDE;
virtual bool IsActive() OVERRIDE;
virtual bool IsCandidatePopupOpen() const OVERRIDE;
// Overridden from TextInputClient:
virtual void SetCompositionText(
const ui::CompositionText& composition) OVERRIDE;
virtual void ConfirmCompositionText() OVERRIDE;
virtual void ClearCompositionText() OVERRIDE;
virtual void InsertText(const string16& text) OVERRIDE;
virtual void InsertChar(char16 ch, int flags) OVERRIDE;
virtual gfx::NativeWindow GetAttachedWindow() const OVERRIDE;
virtual ui::TextInputType GetTextInputType() const OVERRIDE;
virtual ui::TextInputMode GetTextInputMode() const OVERRIDE;
virtual bool CanComposeInline() const OVERRIDE;
virtual gfx::Rect GetCaretBounds() const OVERRIDE;
virtual bool GetCompositionCharacterBounds(uint32 index,
gfx::Rect* rect) const OVERRIDE;
virtual bool HasCompositionText() const OVERRIDE;
virtual bool GetTextRange(gfx::Range* range) const OVERRIDE;
virtual bool GetCompositionTextRange(gfx::Range* range) const OVERRIDE;
virtual bool GetSelectionRange(gfx::Range* range) const OVERRIDE;
virtual bool SetSelectionRange(const gfx::Range& range) OVERRIDE;
virtual bool DeleteRange(const gfx::Range& range) OVERRIDE;
virtual bool GetTextFromRange(const gfx::Range& range,
string16* text) const OVERRIDE;
virtual void OnInputMethodChanged() OVERRIDE;
virtual bool ChangeTextDirectionAndLayoutAlignment(
base::i18n::TextDirection direction) OVERRIDE;
virtual void ExtendSelectionAndDelete(size_t before, size_t after) OVERRIDE;
virtual void EnsureCaretInRect(const gfx::Rect& rect) OVERRIDE;
virtual void OnCandidateWindowShown() OVERRIDE;
virtual void OnCandidateWindowUpdated() OVERRIDE;
virtual void OnCandidateWindowHidden() OVERRIDE;
// Overridden from FocusChangeListener.
virtual void OnWillChangeFocus(View* focused_before, View* focused) OVERRIDE;
virtual void OnDidChangeFocus(View* focused_before, View* focused) OVERRIDE;
ui::InputMethod* GetHostInputMethod() const;
private:
class HostObserver;
void UpdateViewFocusState();
ui::InputMethod* host_;
// An observer observing the host input method for cases that the host input
// method is destroyed before this bridge input method.
scoped_ptr<HostObserver> host_observer_;
const bool shared_input_method_;
DISALLOW_COPY_AND_ASSIGN(InputMethodBridge);
};
} // namespace views
#endif // UI_VIEWS_IME_INPUT_METHOD_BRIDGE_H_
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