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

chrome/browser/ui/app_list/arc_app_prefs.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/arc_app_prefs.h"
+
+#include "base/files/file_util.h"
+#include "base/prefs/scoped_user_pref_update.h"
+#include "base/task_runner_util.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/app_list/arc_app_prefs_factory.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "components/crx_file/id_util.h"
+#include "components/pref_registry/pref_registry_syncable.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace {
+
+const char kArcApps[] = "arcapps";
+const char kName[] = "name";
+const char kPackage[] = "package";
+const char kActivity[] = "activity";
+const char kIcons[] = "icons";
+
+// Provider of write access to a dictionary storing arc app prefs.
+class ScopedArcAppPrefUpdate : public DictionaryPrefUpdate {
+ public:
+  ScopedArcAppPrefUpdate(PrefService* service, const std::string& id)
+     : DictionaryPrefUpdate(service, kArcApps),
+     id_(id) {}
+
+  ~ScopedArcAppPrefUpdate() override {}
+
+  // DictionaryPrefUpdate overrides:
+  base::DictionaryValue* Get() override {
+    base::DictionaryValue* dict = DictionaryPrefUpdate::Get();
+    base::DictionaryValue* app = NULL;
+    if (!dict->GetDictionary(id_, &app)) {
+      app = new base::DictionaryValue();
+      dict->SetWithoutPathExpansion(id_, app);
+    }
+    return app;
+  }
+
+ private:
+  const std::string id_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedArcAppPrefUpdate);
+};
+
+base::FilePath GetIconPath(const base::FilePath& base_path,
+                           ui::ScaleFactor scale_factor) {
+  switch (scale_factor) {
+  case ui::SCALE_FACTOR_100P:
+    return base_path.AppendASCII("icon_100p.png");
+  case ui::SCALE_FACTOR_125P:
+    return base_path.AppendASCII("icon_125p.png");
+  case ui::SCALE_FACTOR_133P:
+    return base_path.AppendASCII("icon_133p.png");
+  case ui::SCALE_FACTOR_140P:
+    return base_path.AppendASCII("icon_140p.png");
+  case ui::SCALE_FACTOR_150P:
+    return base_path.AppendASCII("icon_150p.png");
+  case ui::SCALE_FACTOR_180P:
+    return base_path.AppendASCII("icon_180p.png");
+  case ui::SCALE_FACTOR_200P:
+    return base_path.AppendASCII("icon_200p.png");
+  case ui::SCALE_FACTOR_250P:
+    return base_path.AppendASCII("icon_250p.png");
+  case ui::SCALE_FACTOR_300P:
+    return base_path.AppendASCII("icon_300p.png");
+  default:
+    CHECK(false);
+    return base::FilePath();
+  }
+}
+
+}  // namespace
+
+// static
+ArcAppPrefs* ArcAppPrefs::Create(content::BrowserContext* browser_context,
+                                 const base::FilePath& base_path,
+                                 PrefService* prefs) {
+  return new ArcAppPrefs(browser_context, base_path, prefs);
+}
+
+// static
+void ArcAppPrefs::RegisterProfilePrefs(
+    user_prefs::PrefRegistrySyncable* registry) {
+  registry->RegisterDictionaryPref(
+      kArcApps,
+      user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
+}
+
+// static
+ArcAppPrefs* ArcAppPrefs::Get(content::BrowserContext* context) {
+  return ArcAppPrefsFactory::GetInstance()->GetForBrowserContext(context);
+}
+
+// static
+std::string ArcAppPrefs::GetAppId(const std::string& package,
+                                  const std::string& activity) {
+  std::string input = package + "#" + activity;
+  return crx_file::id_util::GenerateId(input);
+}
+
+ArcAppPrefs::ArcAppPrefs(content::BrowserContext* browser_context,
+                         const base::FilePath& base_path,
+                         PrefService* prefs)
+    : browser_context_(browser_context),
+      prefs_(prefs) {
+  base_path_ = base_path.AppendASCII(kArcApps);
+
+  chromeos::DBusThreadManager::Get()->GetArcBridgeClient()->
+      AddAppObserver(this);
+  chromeos::DBusThreadManager::Get()->GetArcBridgeClient()->Refresh();
+}
+
+ArcAppPrefs::~ArcAppPrefs() {
+  chromeos::DBusThreadManager::Get()->GetArcBridgeClient()->
+      RemoveAppObserver(this);
+}
+
+void ArcAppPrefs::AddObserver(Observer* observer) {
+  observer_list_.AddObserver(observer);
+}
+
+void ArcAppPrefs::RemoveObserver(Observer* observer) {
+  observer_list_.RemoveObserver(observer);
+}
+
+std::vector<std::string> ArcAppPrefs::GetAppIds() const {
+  std::vector<std::string> ids;
+
+  const base::DictionaryValue* apps = prefs_->GetDictionary(kArcApps);
+  for (base::DictionaryValue::Iterator app_id(*apps);
+       !app_id.IsAtEnd(); app_id.Advance()) {
+    if (!crx_file::id_util::IdIsValid(app_id.key()))
+      continue;
+    ids.push_back(app_id.key());
+  }
+
+  return ids;
+}
+
+scoped_ptr<ArcAppPrefs::AppInfo> ArcAppPrefs::GetApp(
+    const std::string& app_id) const {
+  const base::DictionaryValue* app = NULL;
+  const base::DictionaryValue* apps = prefs_->GetDictionary(kArcApps);
+  if (!apps ||
+      !apps->GetDictionaryWithoutPathExpansion(app_id, &app))
+    return scoped_ptr<AppInfo>();
+
+  scoped_ptr<AppInfo> app_info(new AppInfo);
+  app->GetString(kName, &app_info->name);
+  app->GetString(kPackage, &app_info->package);
+  app->GetString(kActivity, &app_info->activity);
+  app_info->ready = ready_apps_.count(app_id) > 0;
+
+  base::FilePath app_path = base_path_.AppendASCII(app_id);
+
+  int icon_flags = 0;
+  if (app->GetInteger(kIcons, &icon_flags)) {
+    for (int i = ui::SCALE_FACTOR_100P; i < ui::NUM_SCALE_FACTORS; ++i) {
+      if (icon_flags & (1 << i)) {
+        IconInfo icon_info;
+        icon_info.scale_factor = static_cast<ui::ScaleFactor>(i);
+        icon_info.path = GetIconPath(app_path, icon_info.scale_factor);
+        app_info->icons.push_back(icon_info);
+      }
+    }
+  }
+
+  return app_info.Pass();
+}
+
+bool ArcAppPrefs::IsRegistered(const std::string& app_id) {
+  const base::DictionaryValue* app = NULL;
+  const base::DictionaryValue* apps = prefs_->GetDictionary(kArcApps);
+  if (!apps || !apps->GetDictionary(app_id, &app)) {
+    return false;
+  }
+  return true;
+}
+
+void ArcAppPrefs::OnAppReady(const chromeos::ArcBridgeClient::AppInfo& app) {
+  std::string app_id = GetAppId(app.package, app.activity);
+  bool was_registered = IsRegistered(app_id);
+
+  ScopedArcAppPrefUpdate update(prefs_, app_id);
+  base::DictionaryValue* app_dict = update.Get();
+  app_dict->SetString(kName, app.name);
+  app_dict->SetString(kPackage, app.package);
+  app_dict->SetString(kActivity, app.activity);
+
+  // From now, app is ready.
+  if (!ready_apps_.count(app_id)) {
+    ready_apps_.insert(app_id);
+  }
+
+  if (was_registered) {
+    FOR_EACH_OBSERVER(Observer,
+                      observer_list_,
+                      OnAppReady(app_id, true));
+  } else {
+    AppInfo app_info;
+    app_info.name = app.name;
+    app_info.package = app.package;
+    app_info.activity = app.activity;
+    app_info.ready = true;
+    FOR_EACH_OBSERVER(Observer,
+                      observer_list_,
+                      OnAppRegistered(app_id, app_info));
+  }
+
+  if (!app.icon.empty()) {
+    // Currently only default 100p icon is supported.
+    InstallIcon(app_id, ui::SCALE_FACTOR_100P, app.icon);
+  }
+}
+
+void ArcAppPrefs::OnAppsRefreshed(
+    const std::vector<chromeos::ArcBridgeClient::AppInfo>& apps) {
+  std::set<std::string> old_ready_apps_;
+  old_ready_apps_.swap(ready_apps_);
+
+  for (size_t i = 0; i < apps.size(); ++i) {
+    OnAppReady(apps[i]);
+  }
+
+  // Detect unavailable apps after current refresh.
+  std::set<std::string>::const_iterator it;
+  for (it = old_ready_apps_.begin(); it != old_ready_apps_.end(); ++it) {
+    const std::string app_id = *it;
+    if (!ready_apps_.count(app_id)) {
+      FOR_EACH_OBSERVER(Observer,
+                        observer_list_,
+                        OnAppReady(app_id, false));
+    }
+  }
+}
+
+void ArcAppPrefs::InstallIcon(const std::string& app_id,
+                              ui::ScaleFactor scale_factor,
+                              const std::vector<uint8>& contentPng) {
+  base::Closure task = base::Bind(&ArcAppPrefs::InstallIconFromFileThread,
+                                  base::Unretained(this),
+                                  app_id,
+                                  scale_factor,
+                                  contentPng);
+  content::BrowserThread::PostTask(content::BrowserThread::FILE,
+                                   FROM_HERE,
+                                   task);
+}
+
+void ArcAppPrefs::InstallIconFromFileThread(
+    const std::string& app_id,
+    ui::ScaleFactor scale_factor,
+    const std::vector<uint8>& contentPng) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
+
+  DCHECK(!contentPng.empty());
+
+  IconInfo icon_info;
+
+  base::FilePath app_path = base_path_.AppendASCII(app_id);
+  base::CreateDirectory(app_path);
+  icon_info.scale_factor = scale_factor;
+  icon_info.path = GetIconPath(app_path, scale_factor);
+
+  int wrote = base::WriteFile(icon_info.path,
+                              reinterpret_cast<const char*>(&contentPng[0]),
+                              contentPng.size());
+  DCHECK(wrote == static_cast<int>(contentPng.size()));
+
+  base::Closure task = base::Bind(&ArcAppPrefs::OnIconInstalled,
+                                  base::Unretained(this),
+                                  app_id,
+                                  icon_info);
+  content::BrowserThread::PostTask(content::BrowserThread::UI,
+                                   FROM_HERE,
+                                   task);
+}
+
+void ArcAppPrefs::OnIconInstalled(const std::string& app_id,
+                                  const IconInfo& icon_info) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+  FOR_EACH_OBSERVER(Observer,
+                    observer_list_,
+                    OnAppIconUpdated(app_id, icon_info));
+
+  // Set flag that icon is available for specific scale factor.
+  ScopedArcAppPrefUpdate update(prefs_, app_id);
+  base::DictionaryValue* app_dict = update.Get();
+  int icon_flags = 0;
+  app_dict->GetInteger(kIcons, &icon_flags);
+  icon_flags |= (1 << icon_info.scale_factor);
+  app_dict->SetInteger(kIcons, icon_flags);
+}