Changes in app.window and app.runtime to support lock screen note taking

chrome/browser/chromeos/lock_screen_apps/state_controller.cc

 // Copyright 2017 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/chromeos/lock_screen_apps/state_controller.h"
 
 #include <utility>
 
 #include "ash/public/interfaces/constants.mojom.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/chromeos/lock_screen_apps/app_manager_impl.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chromeos/chromeos_switches.h"
 #include "components/session_manager/core/session_manager.h"
 #include "content/public/common/service_manager_connection.h"
+#include "extensions/browser/app_window/app_window.h"
+#include "extensions/browser/app_window/native_app_window.h"
+#include "extensions/common/extension.h"
 #include "services/service_manager/public/cpp/connector.h"
 
 using ash::mojom::TrayActionState;
 
 namespace lock_screen_apps {
 
 namespace {
 
 StateController* g_instance = nullptr;
 
 }  // namespace
 
 // static
 bool StateController::IsEnabled() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       chromeos::switches::kEnableLockScreenApps);
 }
 
 // static
 StateController* StateController::Get() {
   DCHECK(g_instance || !IsEnabled());
   return g_instance;
 }
 
-StateController::StateController() : binding_(this), session_observer_(this) {
+StateController::StateController()
+    : binding_(this), app_window_observer_(this), session_observer_(this) {
   DCHECK(!g_instance);
   DCHECK(IsEnabled());
 
   g_instance = this;
 }
 
 StateController::~StateController() {
   DCHECK_EQ(g_instance, this);
   g_instance = nullptr;
 }
@@ skipping 59 matching lines @@
   // Update state to launching even if app fails to launch - this is to notify
   // listeners that a lock screen note request was handled.
   UpdateLockScreenNoteState(TrayActionState::kLaunching);
   if (!app_manager_->LaunchNoteTaking())
     UpdateLockScreenNoteState(TrayActionState::kAvailable);
 }
 
 void StateController::OnSessionStateChanged() {
   if (!session_manager::SessionManager::Get()->IsScreenLocked()) {
     app_manager_->Stop();
-    UpdateLockScreenNoteState(TrayActionState::kNotAvailable);
+    ResetNoteTakingWindowAndMoveToNextState(true /* close_window */);
     return;
   }
 
   // base::Unretained is safe here because |app_manager_| is owned by |this|,
   // and the callback will not be invoked after |app_manager_| goes out of
   // scope.
   app_manager_->Start(
       base::Bind(&StateController::OnNoteTakingAvailabilityChanged,
                  base::Unretained(this)));
   OnNoteTakingAvailabilityChanged();
 }
 
+void StateController::OnAppWindowRemoved(extensions::AppWindow* app_window) {
+  if (note_app_window_ != app_window)
+    return;
+  ResetNoteTakingWindowAndMoveToNextState(false /* close_window */);
+}
+
+extensions::AppWindow* StateController::CreateAppWindowForLockScreenAction(
+    content::BrowserContext* context,
+    const extensions::Extension* extension,
+    extensions::api::app_runtime::ActionType action,
+    std::unique_ptr<extensions::AppDelegate> app_delegate) {
+  if (action != extensions::api::app_runtime::ACTION_TYPE_NEW_NOTE)
+    return nullptr;
+
+  if (GetLockScreenNoteState() != TrayActionState::kLaunching)

[Devlin, 2017/06/16 16:14:57]

why don't we just use lock_screen_note_state_?

[tbarzic, 2017/06/19 05:21:23]

Done.

+    return nullptr;
+
+  if (!chromeos::ProfileHelper::GetSigninProfile()->IsSameProfile(
+          Profile::FromBrowserContext(context))) {
+    return nullptr;
+  }
+
+  if (!extension || app_manager_->GetNoteTakingAppId() != extension->id())
+    return nullptr;
+
+  note_app_window_ =
+      new extensions::AppWindow(context, app_delegate.release(), extension);

[Devlin, 2017/06/16 16:14:57]

What's the lifetime management of this?

[tbarzic, 2017/06/19 05:21:23]

the same as the windows returned by ChromeAppWindowClient::CreateAppWindow - it
becomes owned by the associated widget (at least that is my understanding).

either way, it has a private dtor, so I can't really do better than add a
comment :)

+  app_window_observer_.Add(extensions::AppWindowRegistry::Get(
+      chromeos::ProfileHelper::GetSigninProfile()));
+  UpdateLockScreenNoteState(TrayActionState::kActive);
+  return note_app_window_;
+}
+
 void StateController::MoveToBackground() {
-  TrayActionState state = GetLockScreenNoteState();
-  if (state != TrayActionState::kActive && state != TrayActionState::kLaunching)
+  if (GetLockScreenNoteState() != TrayActionState::kActive)
     return;
   UpdateLockScreenNoteState(TrayActionState::kBackground);
 }
 
 void StateController::MoveToForeground() {
   if (GetLockScreenNoteState() != TrayActionState::kBackground)
     return;
   UpdateLockScreenNoteState(TrayActionState::kActive);
 }
 
-void StateController::SetLockScreenNoteStateForTesting(
-    ash::mojom::TrayActionState state) {
-  lock_screen_note_state_ = state;
-}
-
 void StateController::OnNoteTakingAvailabilityChanged() {
-  if (!app_manager_->IsNoteTakingAppAvailable()) {
-    UpdateLockScreenNoteState(TrayActionState::kNotAvailable);
+  if (!app_manager_->IsNoteTakingAppAvailable() ||
+      (note_app_window_ && note_app_window_->GetExtension()->id() !=
+                               app_manager_->GetNoteTakingAppId())) {
+    ResetNoteTakingWindowAndMoveToNextState(true /* close_window */);
     return;
   }
 
   if (GetLockScreenNoteState() == TrayActionState::kNotAvailable)
     UpdateLockScreenNoteState(TrayActionState::kAvailable);
 }
 
+void StateController::ResetNoteTakingWindowAndMoveToNextState(
+    bool close_window) {
+  app_window_observer_.RemoveAll();
+
+  if (note_app_window_) {
+    if (close_window && note_app_window_->GetBaseWindow())
+      note_app_window_->GetBaseWindow()->Close();
+    note_app_window_ = nullptr;
+  }
+
+  UpdateLockScreenNoteState(app_manager_->IsNoteTakingAppAvailable()
+                                ? TrayActionState::kAvailable
+                                : TrayActionState::kNotAvailable);
+}
+
 bool StateController::UpdateLockScreenNoteState(TrayActionState state) {
   const TrayActionState old_state = GetLockScreenNoteState();
   if (old_state == state)
     return false;
 
   lock_screen_note_state_ = state;
   NotifyLockScreenNoteStateChanged();
   return true;
 }
 
 void StateController::NotifyLockScreenNoteStateChanged() {
   for (auto& observer : observers_)
     observer.OnLockScreenNoteStateChanged(lock_screen_note_state_);
 
   tray_action_ptr_->UpdateLockScreenNoteState(lock_screen_note_state_);
 }
 
 }  // namespace lock_screen_apps