Refactor LauncherDelegate

ash/launcher/app_list_launcher_item_delegate.cc

+// Copyright 2013 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/launcher/app_list_launcher_item_delegate.h"
+
+#include "ash/launcher/launcher_item_delegate_manager.h"
+#include "ash/launcher/launcher_model.h"
+#include "ash/shell.h"
+#include "ash/shell_delegate.h"
+#include "grit/ash_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace ash {
+namespace internal {
+
+AppListLauncherItemDelegate::AppListLauncherItemDelegate() {
+// TODO(simon.hong81): This works for the moment, but the AppList LauncherItem

[sky, 2013/08/27 00:03:47]

nit: indent comments here and 25/26.

[simonhong_, 2013/08/27 01:05:29]

Done.

+// creation should move here.
+  ash::Shell::GetInstance()->launcher_item_delegate_manager()->
+      RegisterLauncherItemDelegate(ash::TYPE_APP_LIST, this);
+}
+
+AppListLauncherItemDelegate::~AppListLauncherItemDelegate() {
+// Don't unregister this from LauncherItemDelegateManager.
+// LauncherItemDelegateManager is already destroyed.
+}
+
+void AppListLauncherItemDelegate::ItemSelected(const LauncherItem& item,
+                                               const ui::Event& event) {
+  // Pass NULL here to show the app list in the currently active RootWindow.
+  Shell::GetInstance()->ToggleAppList(NULL);
+}
+
+base::string16 AppListLauncherItemDelegate::GetTitle(const LauncherItem& item) {
+  LauncherModel* model = Shell::GetInstance()->launcher_model();
+  DCHECK(model);
+  return model->status() == LauncherModel::STATUS_LOADING ?
+      l10n_util::GetStringUTF16(IDS_AURA_APP_LIST_SYNCING_TITLE) :
+      l10n_util::GetStringUTF16(IDS_AURA_APP_LIST_TITLE);
+}
+
+ui::MenuModel* AppListLauncherItemDelegate::CreateContextMenu(
+    const LauncherItem& item,
+    aura::RootWindow* root_window) {
+  return NULL;
+}
+
+LauncherMenuModel* AppListLauncherItemDelegate::CreateApplicationMenu(
+    const LauncherItem& item,
+    int event_flags) {
+  // AppList does not show an application menu.
+  return NULL;
+}
+
+bool AppListLauncherItemDelegate::IsDraggable(const LauncherItem& item) {
+  return false;
+}
+
+bool AppListLauncherItemDelegate::ShouldShowTooltip(const LauncherItem& item) {
+  return true;
+}
+
+}  // namespace internal
+}  // namespace ash