Implement base class for app_list items.

chrome/browser/ui/app_list/chrome_app_list_item.cc

+// Copyright 2015 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 "chrome/browser/ui/app_list/chrome_app_list_item.h"
+
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/app_list/app_list_service.h"
+#include "chrome/browser/ui/host_desktop.h"
+#include "extensions/browser/app_sorting.h"
+#include "extensions/browser/extension_system.h"
+#include "ui/gfx/color_utils.h"
+#include "ui/gfx/image/image_skia_operations.h"
+
+// static
+gfx::ImageSkia ChromeAppListItem::CreateDisabledIcon(
+    const gfx::ImageSkia& icon) {
+  const color_utils::HSL shift = {-1, 0, 0.6};
+  return gfx::ImageSkiaOperations::CreateHSLShiftedImage(icon, shift);
+}
+
+ChromeAppListItem::ChromeAppListItem(Profile* profile,
+                                     const std::string& app_id)
+    : app_list::AppListItem(app_id),
+      profile_(profile)  {
+}
+
+ChromeAppListItem::~ChromeAppListItem() {
+}
+
+extensions::AppSorting* ChromeAppListItem::GetAppSorting() {
+  return extensions::ExtensionSystem::Get(profile())->app_sorting();
+}
+
+void ChromeAppListItem::UpdateFromSync(
+    const app_list::AppListSyncableService::SyncItem* sync_item) {
+  if (sync_item && sync_item->item_ordinal.IsValid()) {
+    // An existing synced position exists, use that.
+    set_position(sync_item->item_ordinal);
+    // Only set the name from the sync item if it is empty.
+    if (name().empty())
+      SetName(sync_item->item_name);
+  } else {
+    GetAppSorting()->EnsureValidOrdinals(id(), syncer::StringOrdinal());

[xiyuan, 2015/12/10 05:21:13]

EnsureValidOrdinals() has side effects of updating ExtensionPrefs, which is not
right when ChromeAppListItem is an ArcAppItem.

[khmel1, 2015/12/10 09:07:31]

Yes, I see that is important. Reverted to original behavior.

+    UpdatePositionFromOrdering();
+  }
+}
+
+void ChromeAppListItem::UpdatePositionFromOrdering() {
+  const syncer::StringOrdinal& page =
+      GetAppSorting()->GetPageOrdinal(id());
+  const syncer::StringOrdinal& launch =
+     GetAppSorting()->GetAppLaunchOrdinal(id());
+  set_position(syncer::StringOrdinal(
+      page.ToInternalValue() + launch.ToInternalValue()));
+}
+
+AppListControllerDelegate* ChromeAppListItem::GetController() {
+  return AppListService::Get(chrome::GetActiveDesktop())->
+      GetControllerDelegate();
+}