arc-app-launcher: Minimal support for ARC app launcher.

chrome/browser/ui/app_list/arc_app_model_builder.cc

+// Copyright (c) 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/arc_app_model_builder.h"
+
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/app_list/app_list_syncable_service.h"
+#include "chrome/browser/ui/app_list/arc_app_item.h"
+#include "ui/app_list/app_list_model.h"
+
+ArcAppModelBuilder::ArcAppModelBuilder(AppListControllerDelegate* controller)
+    : profile_(NULL),

[xiyuan, 2015/11/11 22:15:50]

nit: Use in-class member initialization and use nullptr in place of NULL.

[khmel1, 2015/11/12 08:05:30]

Done.

+      prefs_(NULL),
+      controller_(controller),
+      model_(NULL),
+      service_(NULL) {
+}
+
+ArcAppModelBuilder::~ArcAppModelBuilder() {
+  prefs_->RemoveObserver(this);

[xiyuan, 2015/11/11 22:15:50]

Think we need to make AppListSyncableService depends on ArcAppPrefs to ensure
|prefs_| is still valid at this point. 

Update AppListSyncableServiceFactory ctor with that dependency, somewhere
around:
https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/ui/...

[khmel1, 2015/11/12 08:05:30]

Done.

+}
+
+void ArcAppModelBuilder::InitializeWithService(
+    app_list::AppListSyncableService* service,
+    app_list::AppListModel* model) {
+  DCHECK(!service_ && !profile_);
+  model_ = model;
+  service_ = service;
+  profile_ = service->profile();
+
+  BuildModel();
+}
+
+void ArcAppModelBuilder::InitializeWithProfile(Profile* profile,
+                                               app_list::AppListModel* model) {
+  DCHECK(!service_ && !profile_);
+  model_ = model;
+  profile_ = profile;
+
+  BuildModel();
+}
+
+void ArcAppModelBuilder::BuildModel() {
+  prefs_ = ArcAppPrefs::Get(profile_);
+
+  PopulateApps();
+  prefs_->AddObserver(this);
+}
+
+void ArcAppModelBuilder::PopulateApps() {
+  std::vector<std::string> app_ids = prefs_->GetAppIds();

[xiyuan, 2015/11/11 22:15:50]

nit: #include <vector>

[khmel1, 2015/11/12 08:05:30]

Done.

+  for (size_t i = 0; i < app_ids.size(); ++i) {
+    const std::string app_id = app_ids[i];
+    scoped_ptr<ArcAppPrefs::AppInfo> app_info = prefs_->GetApp(app_id);
+    if (!app_info) {
+      continue;
+    }
+    InsertApp(CreateApp(app_id, *app_info));
+  }
+}
+
+ArcAppItem* ArcAppModelBuilder::GetArcAppItem(const std::string& item_id) {
+  app_list::AppListItem* item = model_->FindItem(item_id);
+  LOG_IF(ERROR, item &&
+         item->GetItemType() != ArcAppItem::kItemType)
+      << "App Item matching id: " << item_id
+      << " has incorrect type: '" << item->GetItemType() << "'";
+  return static_cast<ArcAppItem*>(item);
+}
+
+scoped_ptr<ArcAppItem> ArcAppModelBuilder::CreateApp(
+    const std::string& app_id,
+    const ArcAppPrefs::AppInfo& app_info) {
+  const app_list::AppListSyncableService::SyncItem* sync_item =
+      service_ ? service_->GetSyncItem(app_id) : NULL;
+  scoped_ptr<ArcAppItem> app_item(new ArcAppItem(profile_,
+                                                 sync_item,
+                                                 app_id,
+                                                 app_info.name,
+                                                 app_info.ready));
+  return app_item;
+}
+
+void ArcAppModelBuilder::InsertApp(scoped_ptr<ArcAppItem> app) {
+  DCHECK(!GetArcAppItem(app->id()));
+  if (service_) {
+    service_->AddItem(app.Pass());
+    return;
+  }
+  model_->AddItem(app.Pass());
+}
+
+void ArcAppModelBuilder::OnAppRegistered(const std::string& app_id,
+                                         const ArcAppPrefs::AppInfo& app_info) {
+  InsertApp(CreateApp(app_id, app_info));
+}
+
+void ArcAppModelBuilder::OnAppReady(const std::string& app_id, bool ready) {
+  ArcAppItem* app_item = GetArcAppItem(app_id);
+  if (!app_item) {
+    LOG(WARNING) << "Could not update the state of arc app(" << app_id
+        << ") because it was not found.";
+    return;
+  }
+
+  app_item->SetReady(ready);
+}
+
+void ArcAppModelBuilder::OnAppIconUpdated(const std::string& app_id,
+                                          ui::ScaleFactor scale_factor) {
+  ArcAppItem* app_item = GetArcAppItem(app_id);
+  if (!app_item) {
+    LOG(WARNING) << "Could not update the icon of arc app(" << app_id
+        << ") because it was not found.";
+    return;
+  }
+
+  // Initiate async icon reloading.
+  app_item->icon()->LoadForScaleFactor(scale_factor);
+}