IME (input method editor) support for Aura, part 2 of 3: Add views::InputMethodBridge

ui/views/ime/input_method_bridge.h

+// 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_BRIDGE_H_
+#define UI_VIEWS_IME_INPUT_METHOD_BRIDGE_H_
+#pragma once
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "ui/base/ime/text_input_client.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:
+  InputMethodBridge(internal::InputMethodDelegate* delegate,
+                    ui::InputMethod* host);
+  virtual ~InputMethodBridge();
+
+  // Overridden from InputMethod:
+  virtual void Init(Widget* widget) OVERRIDE;
+  virtual void OnFocus() OVERRIDE;
+  virtual void OnBlur() OVERRIDE;
+  virtual void DispatchKeyEvent(const KeyEvent& key) OVERRIDE;
+  virtual void OnTextInputTypeChanged(View* view) OVERRIDE;
+  virtual void OnCaretBoundsChanged(View* view) OVERRIDE;
+  virtual void CancelComposition(View* view) OVERRIDE;
+  virtual std::string GetInputLocale() OVERRIDE;
+  virtual base::i18n::TextDirection GetInputTextDirection() OVERRIDE;
+  virtual bool IsActive() 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 ui::TextInputType GetTextInputType() const OVERRIDE;
+  virtual gfx::Rect GetCaretBounds() OVERRIDE;
+  virtual bool HasCompositionText() OVERRIDE;
+  virtual bool GetTextRange(ui::Range* range) OVERRIDE;
+  virtual bool GetCompositionTextRange(ui::Range* range) OVERRIDE;
+  virtual bool GetSelectionRange(ui::Range* range) OVERRIDE;
+  virtual bool SetSelectionRange(const ui::Range& range) OVERRIDE;
+  virtual bool DeleteRange(const ui::Range& range) OVERRIDE;
+  virtual bool GetTextFromRange(
+      const ui::Range& range, string16* text) OVERRIDE;
+  virtual void OnInputMethodChanged() OVERRIDE;
+  virtual bool ChangeTextDirectionAndLayoutAlignment(
+      base::i18n::TextDirection direction) OVERRIDE;
+
+  // Overridden from FocusChangeListener.
+  virtual void OnWillChangeFocus(View* focused_before, View* focused) OVERRIDE;
+  virtual void OnDidChangeFocus(View* focused_before, View* focused) OVERRIDE;
+
+ private:
+  void UpdateViewFocusState();
+
+  ui::InputMethod* const host_;
+  bool context_focused_;
+
+  DISALLOW_COPY_AND_ASSIGN(InputMethodBridge);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_IME_INPUT_METHOD_BRIDGE_H_