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

ui/base/ime/input_method_ibus_aura.cc

+// 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 "ui/base/ime/input_method_ibus_aura.h"
+
+#include "base/logging.h"
+#include "ui/aura/desktop.h"
+#include "ui/aura/event.h"
+#include "ui/base/ime/text_input_client.h"
+#include "ui/base/ime/input_method_delegate.h"
+
+namespace ui {
+
+InputMethodIBusAura::InputMethodIBusAura(
+    internal::InputMethodDelegate* delegate)
+    : InputMethodIBus(delegate),
+      active_window_(NULL) {
+}
+
+InputMethodIBusAura::~InputMethodIBusAura() {
+  aura::Desktop* desktop = aura::Desktop::GetInstance();
+  desktop->RemoveObserver(this);
+}
+
+void InputMethodIBusAura::Init() {
+  aura::Desktop* desktop = aura::Desktop::GetInstance();
+  aura::Window* active_window = desktop->active_window();
+  if (active_window)
+    OnActiveWindowChanged(active_window);
+  desktop->AddObserver(this);
+  InputMethodIBus::Init();
+}
+
+void InputMethodIBusAura::OnActiveWindowChanged(
+    aura::Window* new_active_window) {
+  active_window_ = new_active_window;
+  UpdateContextFocusState();
+  // We don't have to confirm/cancel a composition text here because the window
+  // which is losing focus will do that.
+}
+
+bool InputMethodIBusAura::IsWindowFocused(aura::Window* window) const {
+  if (!active_window_ || !window)
+    return false;
+
+  // Return true if |window| is in the |active_window_|'s tree.
+  aura::Window* current = window;
+  while (current) {
+    if (active_window_ == current)
+      return true;
+    current = current->parent();
+  }
+
+  return false;
+}
+
+}  // namespace ui