IME (input method editor) support for Aura, part 3 of 3: Use ui::InputMethod in ash.

ui/aura_shell/input_method_event_filter.h

Index: ui/aura_shell/input_method_event_filter.h
diff --git a/ui/aura_shell/input_method_event_filter.h b/ui/aura_shell/input_method_event_filter.h
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+++ b/ui/aura_shell/input_method_event_filter.h
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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_AURA_INPUT_METHOD_EVENT_FILTER_
+#define UI_AURA_INPUT_METHOD_EVENT_FILTER_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/aura/event_filter.h"
+#include "ui/aura/window_observer.h"
+#include "ui/aura_shell/aura_shell_export.h"
+#include "ui/base/ime/input_method_delegate.h"
+
+namespace ui {
+class InputMethod;
+}
+
+namespace aura_shell {
+namespace internal {
+
+// An event filter that forwards a KeyEvent to a system IME, and dispatches a
+// TranslatedKeyEvent to the root window as needed.
+class AURA_SHELL_EXPORT InputMethodEventFilter
+    : public aura::EventFilter,
+      public ui::internal::InputMethodDelegate,
+      public aura::WindowObserver {
+ public:
+  InputMethodEventFilter();
+  virtual ~InputMethodEventFilter();
+
+ private:
+  // Overridden from aura::EventFilter:
+  virtual bool PreHandleKeyEvent(aura::Window* target,
+                                 aura::KeyEvent* event) OVERRIDE;
+  virtual bool PreHandleMouseEvent(aura::Window* target,
+                                   aura::MouseEvent* event) OVERRIDE;
+  virtual ui::TouchStatus PreHandleTouchEvent(
+      aura::Window* target,
+      aura::TouchEvent* event) OVERRIDE;
+
+  // Overridden from ui::internal::InputMethodDelegate.
+  virtual void DispatchKeyEventPostIME(const base::NativeEvent& event) OVERRIDE;
+  virtual void DispatchFabricatedKeyEventPostIME(ui::EventType type,
+                                                 ui::KeyboardCode key_code,
+                                                 int flags) OVERRIDE;
+
+  // Overridden from aura::WindowObserver.
+  virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
+
+  scoped_ptr<ui::InputMethod> input_method_;
+  bool root_window_destroyed_;
+
+  DISALLOW_COPY_AND_ASSIGN(InputMethodEventFilter);
+};
+
+}  // namespace internal
+}  // namespace aura_shell
+
+#endif  // UI_AURA_SHELL_INPUT_METHOD_EVENT_FILTER_