Redesigns the text input focus handling.

ui/views/ime/null_input_method.h

+// Copyright 2014 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_NULL_INPUT_METHOD_H_
+#define UI_VIEWS_IME_NULL_INPUT_METHOD_H_
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "ui/views/ime/input_method.h"
+
+namespace views {
+
+// An implementation of views::InputMethod which does nothing.
+//
+// We're working on removing views::InputMethod{,Base,Bridge} and going to use
+// only ui::InputMethod.  Use this class instead of views::InputMethodBridge
+// with ui::TextInputFocusManager to effectively eliminate the
+// views::InputMethod layer.
+class NullInputMethod : public InputMethod {
+ public:
+  NullInputMethod();
+
+  // Overridden from InputMethod:
+  virtual void SetDelegate(internal::InputMethodDelegate* delegate) OVERRIDE;
+  virtual void Init(Widget* widget) OVERRIDE;
+  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 bool IsActive() OVERRIDE;
+  virtual ui::TextInputClient* GetTextInputClient() const OVERRIDE;
+  virtual ui::TextInputType GetTextInputType() const OVERRIDE;
+  virtual bool IsCandidatePopupOpen() const OVERRIDE;
+  virtual void ShowImeIfNeeded() OVERRIDE;
+  virtual bool IsMock() const OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NullInputMethod);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_IME_NULL_INPUT_METHOD_H_