Enable profile switching for standalone App Launcher via the Settings App.

chrome/browser/ui/views/app_list/app_list_controller_win.cc

Index: chrome/browser/ui/views/app_list/app_list_controller_win.cc
diff --git a/chrome/browser/ui/views/app_list/app_list_controller_win.cc b/chrome/browser/ui/views/app_list/app_list_controller_win.cc
index 3fc63bcecb1a14b3a480ef87374e723d119d54b7..28a3a0db5eb1ac5b5b0222877d760e364e673f76 100644
--- a/chrome/browser/ui/views/app_list/app_list_controller_win.cc
+++ b/chrome/browser/ui/views/app_list/app_list_controller_win.cc
@@ -7,6 +7,7 @@
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
+#include "base/memory/weak_ptr.h"
 #include "base/path_service.h"
 #include "base/time.h"
 #include "base/timer.h"
@@ -18,6 +19,7 @@
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/platform_util.h"
+#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/shell_integration.h"
@@ -27,7 +29,9 @@
 #include "chrome/browser/ui/extensions/application_launch.h"
 #include "chrome/browser/ui/views/browser_dialogs.h"
 #include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
+#include "chrome/common/pref_names.h"
 #include "chrome/installer/util/util_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "grit/chromium_strings.h"
@@ -145,24 +149,62 @@ class AppListControllerDelegateWin : public AppListControllerDelegate {
 
 // The AppListController class manages global resources needed for the app
 // list to operate, and controls when the app list is opened and closed.
-class AppListController {
+class AppListController : public ProfileInfoCacheObserver {
  public:
-  AppListController()
-      : current_view_(NULL),
-        can_close_app_list_(true),
-        app_list_is_showing_(false) {}
-  ~AppListController() {}
+  AppListController();
 
   void set_can_close(bool can_close) { can_close_app_list_ = can_close; }
   bool can_close() { return can_close_app_list_; }
-  void CreateAppList();
-  void ShowAppList();
+  Profile* profile() const { return profile_; }
+  bool app_list_is_showing() const { return app_list_is_showing_; }
+
+  // Creates the app list view and populates it from |profile|, but doesn't
+  // show it.  Does nothing if the view already exists.
+  void InitView(Profile* profile);
+
+  // Activates the app list at the current mouse cursor location, creating the
+  // app list if necessary.
+  void ShowAppList(Profile* profile);
+
+  // Update the profile path stored in local prefs, load it (if not already
+  // loaded), and show the app list.
+  void SetProfilePath(const FilePath& profile_file_path);
+
   void DismissAppList();
   void AppListClosing();
   void AppListActivationChanged(bool active);
   app_list::AppListView* GetView() { return current_view_; }
 
+  // TODO(koz): Split the responsibility for tracking profiles into a
+  // platform-independent class.
+  // Overidden from ProfileInfoCacheObserver.
+  void OnProfileAdded(const FilePath& profilePath) OVERRIDE {}
+  // We need to watch for profile removal to keep kAppListProfile updated.
+  void OnProfileWillBeRemoved(const FilePath& profile_path) OVERRIDE;
+  void OnProfileWasRemoved(const FilePath& profile_path,
+                           const string16& profile_name) OVERRIDE {}
+  void OnProfileNameChanged(const FilePath& profile_path,
+                            const string16& profile_name) OVERRIDE {}
+  void OnProfileAvatarChanged(const FilePath& profile_path) OVERRIDE {}
+
  private:
+  // Loads a profile asynchronously and calls OnProfileLoaded() when done.
+  void LoadProfileAsync(const FilePath& profile_file_path);
+
+  // Callback for asynchronous profile load.
+  void OnProfileLoaded(int profile_load_sequence_id,
+                       Profile* profile,
+                       Profile::CreateStatus status);
+
+  // We need to keep the browser alive while we are loading a profile as that
+  // shows intent to show the app list. These two functions track our pending
+  // profile loads and start or end browser keep alive accordingly.
+  void IncrementPendingProfileLoads();
+  void DecrementPendingProfileLoads();
+
+  // Create or recreate, and initialize |current_view_| from |profile|.
+  void PopulateViewFromProfile(Profile* profile);
+
   // Utility methods for showing the app list.
   void SnapArrowLocationToTaskbarEdge(
       const gfx::Display& display,
@@ -191,6 +233,9 @@ class AppListController {
 
   app_list::PaginationModel pagination_model_;
 
+  // The profile the AppList is currently displaying.
+  Profile* profile_;
+
   // True if the controller can close the app list.
   bool can_close_app_list_;
 
@@ -198,6 +243,14 @@ class AppListController {
   // browser process keep-alives active.
   bool app_list_is_showing_;
 
+  // Incremented to indicate that pending profile loads are no longer valid.
+  int profile_load_sequence_id_;
+
+  // How many profile loads are pending.
+  int pending_profile_loads_;
+
+  base::WeakPtrFactory<AppListController> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(AppListController);
 };
 
@@ -297,15 +350,135 @@ void AppListControllerDelegateWin::LaunchApp(
       profile, extension, NEW_FOREGROUND_TAB));
 }
 
-void AppListController::CreateAppList() {
-#if !defined(USE_AURA)
+AppListController::AppListController()
+    : current_view_(NULL),
+      profile_(NULL),
+      can_close_app_list_(true),
+      app_list_is_showing_(false),
+      profile_load_sequence_id_(0),
+      pending_profile_loads_(0),
+      weak_factory_(this) {
+  ProfileManager* profile_manager = g_browser_process->profile_manager();
+  profile_manager->GetProfileInfoCache().AddObserver(this);
+}
+
+void AppListController::OnProfileWillBeRemoved(const FilePath& profile_path) {
+  // If the profile the app list uses just got deleted, reset it to the last
+  // used profile.
+  PrefService* local_state = g_browser_process->local_state();
+  std::string app_list_last_profile = local_state->GetString(
+      prefs::kAppListProfile);
+  if (profile_path.BaseName().MaybeAsASCII() == app_list_last_profile) {
+    local_state->SetString(prefs::kAppListProfile,
+        local_state->GetString(prefs::kProfileLastUsed));
+  }
+}
+
+void AppListController::SetProfilePath(const FilePath& profile_file_path) {
+  g_browser_process->local_state()->SetString(
+      prefs::kAppListProfile,
+      profile_file_path.BaseName().MaybeAsASCII());
+  ProfileManager* profile_manager = g_browser_process->profile_manager();
+  Profile* profile = profile_manager->GetProfileByPath(profile_file_path);
+
+  if (!profile) {
+    LoadProfileAsync(profile_file_path);
+    return;
+  }
+
+  ShowAppList(profile);
+}
+
+void AppListController::LoadProfileAsync(const FilePath& profile_file_path) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+
+  // Invalidate any pending profile path loads.
+  profile_load_sequence_id_++;
+
+  IncrementPendingProfileLoads();
+
+  ProfileManager* profile_manager = g_browser_process->profile_manager();
+  profile_manager->CreateProfileAsync(
+      profile_file_path,
+      base::Bind(&AppListController::OnProfileLoaded,
+                 weak_factory_.GetWeakPtr(), profile_load_sequence_id_),
+      string16(), string16(), false);
+}
+
+void AppListController::OnProfileLoaded(int profile_load_sequence_id,
+                                        Profile* profile,
+                                        Profile::CreateStatus status) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  switch (status) {
+    case Profile::CREATE_STATUS_CREATED:
+      break;
+    case Profile::CREATE_STATUS_INITIALIZED:
+      // Only show if there has been no other profile shown since this load
+      // started.
+      if (profile_load_sequence_id == profile_load_sequence_id_)
+        ShowAppList(profile);
+      DecrementPendingProfileLoads();
+      break;
+    case Profile::CREATE_STATUS_FAIL:
+      DecrementPendingProfileLoads();
+      break;
+  }
+
+}
+
+void AppListController::IncrementPendingProfileLoads() {
+  pending_profile_loads_++;
+  if (pending_profile_loads_ == 1)
+    chrome::StartKeepAlive();
+}
+
+void AppListController::DecrementPendingProfileLoads() {
+  pending_profile_loads_--;
+  if (pending_profile_loads_ == 0)
+    chrome::EndKeepAlive();
+}
+
+void AppListController::ShowAppList(Profile* profile) {
+  DCHECK(profile);
+
+  // Invalidate any pending profile path loads.
+  profile_load_sequence_id_++;
+
+  // Do nothing if the app list is already displaying |profile|.
+  if (app_list_is_showing_ && (profile == profile_))
+    return;
+
+  DismissAppList();
+  PopulateViewFromProfile(profile);
+
+  if (!app_list_is_showing_) {
+    app_list_is_showing_ = true;
+    chrome::StartKeepAlive();
+  }
+
+  DCHECK(current_view_ && app_list_is_showing_);
+  gfx::Point cursor = gfx::Screen::GetNativeScreen()->GetCursorScreenPoint();
+  UpdateArrowPositionAndAnchorPoint(cursor);
+  current_view_->Show();
+  current_view_->GetWidget()->Activate();
+  current_view_->GetWidget()->SetAlwaysOnTop(true);
+}
+
+void AppListController::InitView(Profile* profile) {
   if (current_view_)
     return;
+  PopulateViewFromProfile(profile);
+}
 
+void AppListController::PopulateViewFromProfile(Profile* profile) {
+#if !defined(USE_AURA)
+  if (profile == profile_)
+    return;
+  profile_ = profile;
   // The controller will be owned by the view delegate, and the delegate is
   // owned by the app list view. The app list view manages it's own lifetime.
   current_view_ = new app_list::AppListView(
-      new AppListViewDelegate(new AppListControllerDelegateWin()));
+      new AppListViewDelegate(new AppListControllerDelegateWin(), profile_));
   gfx::Point cursor = gfx::Screen::GetNativeScreen()->GetCursorScreenPoint();
   current_view_->InitAsBubble(GetDesktopWindow(),
                               &pagination_model_,
@@ -326,23 +499,6 @@ void AppListController::CreateAppList() {
 #endif
 }
 
-void AppListController::ShowAppList() {
-#if !defined(USE_AURA)
-  if (!current_view_)
-    CreateAppList();
-
-  if (app_list_is_showing_)
-    return;
-  app_list_is_showing_ = true;
-  chrome::StartKeepAlive();
-  gfx::Point cursor = gfx::Screen::GetNativeScreen()->GetCursorScreenPoint();
-  UpdateArrowPositionAndAnchorPoint(cursor);
-  current_view_->Show();
-  current_view_->GetWidget()->Activate();
-  current_view_->GetWidget()->SetAlwaysOnTop(true);
-#endif
-}
-
 void AppListController::DismissAppList() {
   if (current_view_ && app_list_is_showing_ && can_close_app_list_) {
     current_view_->GetWidget()->Hide();
@@ -614,18 +770,18 @@ void CheckAppListTaskbarShortcutOnFileThread(const FilePath& user_data_dir,
   }
 }
 
-void CreateAppList() {
-  g_app_list_controller.Get().CreateAppList();
+void InitView(Profile* profile) {
+  g_app_list_controller.Get().InitView(profile);
 }
 
 }  // namespace
 
 namespace chrome {
 
-void InitAppList() {
-  // Check that the presence of the app list shortcut matches the flag
-  // kShowAppListShortcut. This will either create or delete a shortcut
-  // file in the user data directory.
+void InitAppList(Profile* profile) {
+  // Check that the app list shortcut matches the flag kShowAppListShortcut.
+  // This will either create or delete a shortcut file in the user data
+  // directory.
   // TODO(benwells): Remove this and the flag once the app list installation
   // is implemented.
   static bool checked_shortcut = false;
@@ -639,18 +795,36 @@ void InitAppList() {
                    GetAppModelId()));
   }
 
+  // Instantiate AppListController so it listens for profile deletions.
+  g_app_list_controller.Get();
+
   // Post a task to create the app list. This is posted to not impact startup
   // time.
   const int kInitWindowDelay = 5;
   MessageLoop::current()->PostDelayedTask(
       FROM_HERE,
-      base::Bind(&CreateAppList),
+      base::Bind(&InitView, profile),
       base::TimeDelta::FromSeconds(kInitWindowDelay));
 }
 
-void ShowAppList() {
-  // Create the App list.
-  g_app_list_controller.Get().ShowAppList();
+void ShowAppList(Profile* profile) {
+  g_app_list_controller.Get().ShowAppList(profile);
+}
+
+void SetAppListProfile(const FilePath& profile_file_path) {
+  g_app_list_controller.Get().SetProfilePath(profile_file_path);
+}
+
+void DismissAppList() {
+  g_app_list_controller.Get().DismissAppList();
+}
+
+Profile* GetCurrentAppListProfile() {
+  return g_app_list_controller.Get().profile();
+}
+
+bool IsAppListVisible() {
+  return g_app_list_controller.Get().app_list_is_showing();
 }
 
 }  // namespace chrome