Revert "ambient: Handle key press exit path"

This reverts commit 5e5acdd4.

Reason for revert: Some corner cases need to be handled.

Bug: b/175398984

Original change's description:
> ambient: Handle key press exit path
>
> Currently ambient mode container does not have focus. A key press will
> enter into the login pod.
> To be consistent with other platforms, the key press is consumed in
> ambient mode by making the ambient mode container activatable.
>
> Bug: b/173642446
> Test: new unittest
> Change-Id: I2331079635834972e292076e55bec54dffe6f507
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2577923
> Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
> Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
> Commit-Queue: Tao Wu <wutao@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#835380}

TBR=xiyuan@chromium.org,xiaohuic@chromium.org,wutao@chromium.org,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: b/173642446
Change-Id: I1789704605085aece066ad65d87241594d222619
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2593746
Commit-Queue: Tao Wu <wutao@chromium.org>
Reviewed-by: Tao Wu <wutao@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837320}

ash/ambient/ambient_controller.cc

@@ -118,15 +118,6 @@ bool IsAmbientModeEnabled() {
          pref_service->GetBoolean(ambient::prefs::kAmbientModeEnabled);
 }
 
-bool IsAmbientWidgetVisible() {
-  for (auto* controller : RootWindowController::root_window_controllers()) {
-    auto* widget = controller->ambient_widget();
-    if (widget && widget->IsVisible())
-      return true;
-  }
-  return false;
-}
-
 class AmbientWidgetDelegate : public views::WidgetDelegate {
  public:
   AmbientWidgetDelegate() { SetCanMaximize(true); }
@@ -417,10 +408,6 @@ void AmbientController::OnAuthScanDone(
 }
 
 void AmbientController::OnUserActivity(const ui::Event* event) {
-  // If ambient widget is visible, it will handle key event by OnKeyPressed().
-  if (IsAmbientWidgetVisible() && event->IsKeyEvent())
-    return;
-
   DismissUI();
 }
 
@@ -476,10 +463,6 @@ bool AmbientController::IsShown() const {
   return ambient_ui_model_.ui_visibility() == AmbientUiVisibility::kShown;
 }
 
-void AmbientController::OnViewEvents() {
-  DismissUI();
-}
-
 void AmbientController::AcquireWakeLock() {
   if (!wake_lock_) {
     mojo::Remote<device::mojom::WakeLockProvider> provider;

ash/ambient/ambient_controller.h

@@ -105,9 +105,6 @@ class ASH_EXPORT AmbientController
   // constructed.
   bool IsShown() const;
 
-  // Handles events on the ambient mode container view.
-  void OnViewEvents();
-
   void RequestAccessToken(
       AmbientAccessTokenController::AccessTokenCallback callback,
       bool may_refresh_token_on_lock = false);

ash/ambient/ambient_controller_unittest.cc

@@ -474,6 +474,9 @@ TEST_F(AmbientControllerTest, ShouldDismissContainerViewOnEvents) {
       gfx::Vector2d(), gfx::PointF(), gfx::PointF(), base::TimeTicks(),
       ui::EF_NONE, ui::EF_NONE));
 
+  events.emplace_back(std::make_unique<ui::KeyEvent>(
+      ui::ET_KEY_PRESSED, ui::VKEY_SPACE, ui::EF_NONE));
+
   events.emplace_back(std::make_unique<ui::ScrollEvent>(
       ui::ET_SCROLL, gfx::PointF(), gfx::PointF(), base::TimeTicks(),
       ui::EF_NONE, /*x_offset=*/0.0f,
@@ -506,49 +509,15 @@ TEST_F(AmbientControllerTest, ShouldDismissAndThenComesBack) {
   FastForwardTiny();
   EXPECT_TRUE(WidgetsVisible());
 
-  ui::MouseEvent mouse_event(ui::ET_MOUSE_PRESSED, gfx::Point(), gfx::Point(),
-                             base::TimeTicks(), ui::EF_NONE, ui::EF_NONE);
-  ambient_controller()->OnUserActivity(&mouse_event);
-  FastForwardTiny();
-  EXPECT_TRUE(GetContainerViews().empty());
-
-  FastForwardToLockScreenTimeout();
-  FastForwardTiny();
-  EXPECT_TRUE(WidgetsVisible());
-}
-
-TEST_F(AmbientControllerTest, ShouldDismissContainerViewOnKeyEvent) {
-  // Without user interaction, should show ambient mode.
-  ambient_controller()->ShowUi();
-  EXPECT_FALSE(WidgetsVisible());
-  FastForwardTiny();
-  EXPECT_TRUE(WidgetsVisible());
-  CloseAmbientScreen();
-
-  // Before ambient widget is created, if there is a user interaction, will exit
-  // ambient mode.
   ui::KeyEvent key_event(ui::ET_KEY_PRESSED, ui::KeyboardCode::VKEY_1,
                          ui::EF_NONE);
-
-  ambient_controller()->ShowUi();
-  EXPECT_FALSE(WidgetsVisible());
   ambient_controller()->OnUserActivity(&key_event);
   FastForwardTiny();
-  EXPECT_FALSE(WidgetsVisible());
+  EXPECT_TRUE(GetContainerViews().empty());
 
-  // After ambient widget is created, OnUserActivity() should ignore key event.
-  ambient_controller()->ShowUi();
-  FastForwardTiny();
-  EXPECT_TRUE(WidgetsVisible());
-  ambient_controller()->OnUserActivity(&key_event);
+  FastForwardToLockScreenTimeout();
   FastForwardTiny();
   EXPECT_TRUE(WidgetsVisible());
-
-  // General key press will exit ambient mode.
-  // Simulate key press to close the widget.
-  ui::test::EventGenerator* event_generator = GetEventGenerator();
-  event_generator->PressKey(ui::VKEY_A, /*flags=*/0);
-  EXPECT_FALSE(WidgetsVisible());
 }
 
 TEST_F(AmbientControllerTest,
@@ -737,7 +706,8 @@ TEST_F(AmbientControllerTest, ShowsOnMultipleDisplays) {
   EXPECT_EQ(GetContainerViews().size(), 2u);
   // Check that each root controller has an ambient widget.
   for (auto* ctrl : RootWindowController::root_window_controllers())
-    EXPECT_TRUE(ctrl->ambient_widget() && ctrl->ambient_widget()->IsVisible());
+    EXPECT_TRUE(ctrl->ambient_widget_for_testing() &&
+                ctrl->ambient_widget_for_testing()->IsVisible());
 }
 
 TEST_F(AmbientControllerTest, RespondsToDisplayAdded) {
@@ -756,7 +726,8 @@ TEST_F(AmbientControllerTest, RespondsToDisplayAdded) {
   EXPECT_EQ(screen->GetNumDisplays(), 2);
   EXPECT_EQ(GetContainerViews().size(), 2u);
   for (auto* ctrl : RootWindowController::root_window_controllers())
-    EXPECT_TRUE(ctrl->ambient_widget() && ctrl->ambient_widget()->IsVisible());
+    EXPECT_TRUE(ctrl->ambient_widget_for_testing() &&
+                ctrl->ambient_widget_for_testing()->IsVisible());
 }
 
 TEST_F(AmbientControllerTest, HandlesDisplayRemoved) {

ash/ambient/ambient_view_delegate_impl.cc

@@ -31,10 +31,6 @@ AmbientBackendModel* AmbientViewDelegateImpl::GetAmbientBackendModel() {
   return ambient_controller_->GetAmbientBackendModel();
 }
 
-void AmbientViewDelegateImpl::OnViewEvents() {
-  ambient_controller_->OnViewEvents();
-}
-
 void AmbientViewDelegateImpl::OnPhotoTransitionAnimationCompleted() {
   for (auto& observer : view_delegate_observers_)
     observer.OnPhotoTransitionAnimationCompleted();

ash/ambient/ambient_view_delegate_impl.h

@@ -23,7 +23,6 @@ class AmbientViewDelegateImpl : public AmbientViewDelegate {
 
   // AmbientViewDelegate:
   AmbientBackendModel* GetAmbientBackendModel() override;
-  void OnViewEvents() override;
   void OnPhotoTransitionAnimationCompleted() override;
 
   void AddObserver(AmbientViewDelegateObserver* observer);

ash/ambient/test/ambient_ash_test_base.cc

@@ -391,7 +391,7 @@ AmbientPhotoController* AmbientAshTestBase::photo_controller() {
 std::vector<AmbientContainerView*> AmbientAshTestBase::GetContainerViews() {
   std::vector<AmbientContainerView*> result;
   for (auto* ctrl : RootWindowController::root_window_controllers()) {
-    auto* widget = ctrl->ambient_widget();
+    auto* widget = ctrl->ambient_widget_for_testing();
     if (widget) {
       auto* view = widget->GetContentsView();
       DCHECK(view && view->GetID() == kAmbientContainerView);
@@ -402,7 +402,8 @@ std::vector<AmbientContainerView*> AmbientAshTestBase::GetContainerViews() {
 }
 
 AmbientContainerView* AmbientAshTestBase::GetContainerView() {
-  auto* widget = Shell::GetPrimaryRootWindowController()->ambient_widget();
+  auto* widget =
+      Shell::GetPrimaryRootWindowController()->ambient_widget_for_testing();
 
   if (widget) {
     auto* container_view = widget->GetContentsView();

ash/ambient/ui/ambient_container_view.cc

@@ -60,11 +60,6 @@ void AmbientContainerView::Layout() {
   View::Layout();
 }
 
-bool AmbientContainerView::OnKeyPressed(const ui::KeyEvent& event) {
-  delegate_->OnViewEvents();
-  return true;
-}
-
 void AmbientContainerView::Init() {
   // TODO(b/139954108): Choose a better dark mode theme color.
   SetBackground(views::CreateSolidBackground(SK_ColorBLACK));

ash/ambient/ui/ambient_container_view.h

@@ -28,7 +28,6 @@ class ASH_EXPORT AmbientContainerView : public views::View {
   const char* GetClassName() const override;
   gfx::Size CalculatePreferredSize() const override;
   void Layout() override;
-  bool OnKeyPressed(const ui::KeyEvent& event) override;
 
  private:
   friend class AmbientAshTestBase;

ash/ambient/ui/ambient_view_delegate.h

@@ -27,9 +27,6 @@ class ASH_EXPORT AmbientViewDelegate {
   // Ambient Mode.
   virtual AmbientBackendModel* GetAmbientBackendModel() = 0;
 
-  // Invoked when user interacting with the ambient mode container view.
-  virtual void OnViewEvents() = 0;
-
   // Invoked when the photo transition animation completed.
   virtual void OnPhotoTransitionAnimationCompleted() = 0;
 };

ash/public/cpp/shell_window_ids.cc

@@ -33,7 +33,7 @@ constexpr std::array<int, 11> kPreDesksActivatableContainersIds = {
 
 // List of IDs of the containers whose windows are actiavated *after* windows in
 // the desks containers.
-constexpr std::array<int, 5> kPostDesksActivatableContainersIds = {
+constexpr std::array<int, 4> kPostDesksActivatableContainersIds = {
     kShellWindowId_HomeScreenContainer,
 
     // Launcher and status are intentionally checked after other containers
@@ -42,9 +42,6 @@ constexpr std::array<int, 5> kPostDesksActivatableContainersIds = {
     kShellWindowId_PipContainer,
     kShellWindowId_ShelfContainer,
     kShellWindowId_ShelfBubbleContainer,
-
-    // Ambient mode container is fullscreen and on top of other windows.
-    kShellWindowId_AmbientModeContainer,
 };
 
 }  // namespace

ash/root_window_controller.h

@@ -227,7 +227,7 @@ class ASH_EXPORT RootWindowController {
   void CreateAmbientWidget();
   void CloseAmbientWidget(bool immediately);
 
-  views::Widget* ambient_widget() { return ambient_widget_.get(); }
+  views::Widget* ambient_widget_for_testing() { return ambient_widget_.get(); }
 
   // Returns accessibility panel layout manager for this root window.
   AccessibilityPanelLayoutManager* GetAccessibilityPanelLayoutManagerForTest();