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

ash/ime/input_method_event_filter.cc

Index: ash/ime/input_method_event_filter.cc
diff --git a/ash/ime/input_method_event_filter.cc b/ash/ime/input_method_event_filter.cc
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index 0000000000000000000000000000000000000000..7f802c0e85c01ba83648def978ee9857e971f383
--- /dev/null
+++ b/ash/ime/input_method_event_filter.cc
@@ -0,0 +1,86 @@
+// 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.
+
+#include "ash/ime/input_method_event_filter.h"
+
+#include "ash/ime/event.h"
+#include "ash/shell.h"
+#include "ui/aura/client/aura_constants.h"
+#include "ui/aura/event.h"
+#include "ui/aura/root_window.h"
+#include "ui/base/ime/input_method.h"
+#include "ui/base/ime/input_method_factory.h"
+
+namespace ash {
+namespace internal {
+
+////////////////////////////////////////////////////////////////////////////////
+// InputMethodEventFilter, public:
+
+InputMethodEventFilter::InputMethodEventFilter()
+    : EventFilter(aura::RootWindow::GetInstance()),
+      ALLOW_THIS_IN_INITIALIZER_LIST(
+          input_method_(ui::CreateInputMethod(this))) {
+  // TODO(yusukes): Check if the root window is currently focused and pass the
+  // result to Init().
+  input_method_->Init(true);
+  aura::RootWindow::GetInstance()->SetProperty(
+      aura::client::kRootWindowInputMethod,
+      input_method_.get());
+}
+
+InputMethodEventFilter::~InputMethodEventFilter() {
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// InputMethodEventFilter, EventFilter implementation:
+
+bool InputMethodEventFilter::PreHandleKeyEvent(aura::Window* target,
+                                               aura::KeyEvent* event) {
+  const ui::EventType type = event->type();
+  if (type == ui::ET_TRANSLATED_KEY_PRESS ||
+      type == ui::ET_TRANSLATED_KEY_RELEASE) {
+    // The |event| is already handled by this object, change the type of the
+    // event to ui::ET_KEY_* and pass it to the next filter.
+    static_cast<TranslatedKeyEvent*>(event)->ConvertToKeyEvent();
+    return false;
+  } else {
+    input_method_->DispatchKeyEvent(event->native_event());
+    return true;
+  }
+}
+
+bool InputMethodEventFilter::PreHandleMouseEvent(aura::Window* target,
+                                                 aura::MouseEvent* event) {
+  return false;
+}
+
+ui::TouchStatus InputMethodEventFilter::PreHandleTouchEvent(
+    aura::Window* target,
+    aura::TouchEvent* event) {
+  return ui::TOUCH_STATUS_UNKNOWN;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// InputMethodEventFilter, ui::InputMethodDelegate implementation:
+
+void InputMethodEventFilter::DispatchKeyEventPostIME(
+    const base::NativeEvent& event) {
+#if defined(OS_WIN)
+  DCHECK(event.message != WM_CHAR);
+#endif
+  TranslatedKeyEvent aura_event(event, false /* is_char */);
+  aura::RootWindow::GetInstance()->DispatchKeyEvent(&aura_event);
+}
+
+void InputMethodEventFilter::DispatchFabricatedKeyEventPostIME(
+    ui::EventType type,
+    ui::KeyboardCode key_code,
+    int flags) {
+  TranslatedKeyEvent aura_event(type == ui::ET_KEY_PRESSED, key_code, flags);
+  aura::RootWindow::GetInstance()->DispatchKeyEvent(&aura_event);
+}
+
+}  // namespace internal
+}  // namespace ash