Add a semi-opaque backdrop mode

Change black background to semi-opaque (60% #202124) for 'Add Account'
dialog. This is a short term fix until crbug/1016828 is resolved.

Bug: 997479, 1016828
Change-Id: I4741e2847f25b30a5ca3ee295569ea0c1c81cf4f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1847274
Commit-Queue: Anastasiia Nikolaienko <anastasiian@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Mitsuru Oshima (slow) <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709109}

ash/home_screen/drag_window_from_shelf_controller.h

@@ -116,7 +116,7 @@ class DragWindowFromShelfController : public aura::WindowObserver {
   gfx::Point initial_location_in_screen_;
   gfx::Point previous_location_in_screen_;
   bool drag_started_ = false;
-  BackdropWindowMode original_backdrop_mode_ = BackdropWindowMode::kAuto;
+  BackdropWindowMode original_backdrop_mode_ = BackdropWindowMode::kAutoOpaque;
 
   // Hide all eligible windows during window dragging. Depends on different
   // scenarios, we may or may not reshow there windows when drag ends.

ash/public/cpp/window_properties.cc

@@ -23,7 +23,7 @@ DEFINE_OWNED_UI_CLASS_PROPERTY_KEY(std::string, kAppIDKey, nullptr)
 DEFINE_OWNED_UI_CLASS_PROPERTY_KEY(std::string, kArcPackageNameKey, nullptr)
 DEFINE_UI_CLASS_PROPERTY_KEY(BackdropWindowMode,
                              kBackdropWindowMode,
-                             BackdropWindowMode::kAuto)
+                             BackdropWindowMode::kAutoOpaque)
 DEFINE_UI_CLASS_PROPERTY_KEY(bool, kBlockedForAssistantSnapshotKey, false)
 DEFINE_UI_CLASS_PROPERTY_KEY(bool, kCanAttachToAnotherWindowKey, true)
 DEFINE_UI_CLASS_PROPERTY_KEY(bool, kCanConsumeSystemKeysKey, false)

ash/public/cpp/window_properties.h

@@ -28,9 +28,11 @@ enum class WindowPinType;
 enum class WindowStateType;
 
 enum class BackdropWindowMode {
-  kEnabled,   // The window needs a backdrop shown behind it.
-  kDisabled,  // The window should never have a backdrop.
-  kAuto,  // The window manager decides if the window should have a backdrop.
+  kEnabled,     // The window needs a backdrop shown behind it.
+  kDisabled,    // The window should never have a backdrop.
+  kAutoOpaque,  // The window manager decides if the window should have a fully
+                // opaque backdrop.
+  kAutoSemiOpaque,  // The window needs a semi-opaque backdrop shown behind it.
 };
 
 // Shell-specific window property keys for use by ash and its clients.

ash/wm/splitview/split_view_controller_unittest.cc

@@ -2740,7 +2740,7 @@ TEST_P(SplitViewTabDraggingTest, NoBackDropDuringDragging) {
   std::unique_ptr<aura::Window> window(
       CreateWindowWithType(bounds, AppType::BROWSER));
   EXPECT_EQ(window->GetProperty(kBackdropWindowMode),
-            BackdropWindowMode::kAuto);
+            BackdropWindowMode::kAutoOpaque);
 
   std::unique_ptr<WindowResizer> resizer =
       StartDrag(window.get(), window.get());
@@ -2754,7 +2754,7 @@ TEST_P(SplitViewTabDraggingTest, NoBackDropDuringDragging) {
 
   resizer->CompleteDrag();
   EXPECT_EQ(window->GetProperty(kBackdropWindowMode),
-            BackdropWindowMode::kAuto);
+            BackdropWindowMode::kAutoOpaque);
 }
 
 // Test that in tablet mode, the window that is in tab-dragging process should

ash/wm/tablet_mode/tablet_mode_browser_window_drag_delegate.cc

@@ -221,7 +221,7 @@ class TabletModeBrowserWindowDragDelegate::WindowsHider
 
   // The original backdrop mode of the source window. Should be disabled during
   // dragging.
-  BackdropWindowMode source_window_backdrop_ = BackdropWindowMode::kAuto;
+  BackdropWindowMode source_window_backdrop_ = BackdropWindowMode::kAutoOpaque;
 
   DISALLOW_COPY_AND_ASSIGN(WindowsHider);
 };

ash/wm/tablet_mode/tablet_mode_window_drag_delegate.h

@@ -132,7 +132,7 @@ class TabletModeWindowDragDelegate {
   aura::Window* dragged_window_ = nullptr;  // not owned.
 
   // The backdrop should be disabled during dragging and resumed after dragging.
-  BackdropWindowMode original_backdrop_mode_ = BackdropWindowMode::kAuto;
+  BackdropWindowMode original_backdrop_mode_ = BackdropWindowMode::kAutoOpaque;
 
   // The dragged window should have the active window shadow elevation during
   // dragging.

ash/wm/workspace/backdrop_controller.cc

@@ -12,7 +12,6 @@
 #include "ash/public/cpp/app_types.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/public/cpp/window_animation_types.h"
-#include "ash/public/cpp/window_properties.h"
 #include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/wallpaper/wallpaper_controller_impl.h"
@@ -32,8 +31,21 @@
 #include "ui/wm/core/window_util.h"
 
 namespace ash {
+
 namespace {
 
+constexpr SkColor kSemiOpaqueBackdropColor =
+    SkColorSetARGB(0x99, 0x20, 0x21, 0x24);
+
+SkColor GetBackdropColorByMode(BackdropWindowMode mode) {
+  if (mode == BackdropWindowMode::kAutoSemiOpaque)
+    return kSemiOpaqueBackdropColor;
+
+  DCHECK(mode == BackdropWindowMode::kAutoOpaque ||
+         mode == BackdropWindowMode::kEnabled);
+  return SK_ColorBLACK;
+}
+
 class BackdropEventHandler : public ui::EventHandler {
  public:
   BackdropEventHandler() = default;
@@ -275,7 +287,7 @@ void BackdropController::UpdateBackdropInternal() {
     return;
   }
 
-  EnsureBackdropWidget();
+  EnsureBackdropWidget(window->GetProperty(kBackdropWindowMode));
   UpdateAccessibilityMode();
 
   if (window == backdrop_window_ && backdrop_->IsVisible()) {
@@ -299,9 +311,13 @@ void BackdropController::UpdateBackdropInternal() {
   container_->StackChildBelow(backdrop_window_, window);
 }
 
-void BackdropController::EnsureBackdropWidget() {
-  if (backdrop_)
+void BackdropController::EnsureBackdropWidget(BackdropWindowMode mode) {
+  if (backdrop_) {
+    SkColor backdrop_color = GetBackdropColorByMode(mode);
+    if (backdrop_window_->layer()->GetTargetColor() != backdrop_color)
+      backdrop_window_->layer()->SetColor(backdrop_color);
     return;
+  }
 
   backdrop_ = std::make_unique<views::Widget>();
   views::Widget::InitParams params(
@@ -321,7 +337,7 @@ void BackdropController::EnsureBackdropWidget() {
   // The backdrop window in always on top container can be reparented without
   // this when the window is set to fullscreen.
   AlwaysOnTopController::SetDisallowReparent(backdrop_window_);
-  backdrop_window_->layer()->SetColor(SK_ColorBLACK);
+  backdrop_window_->layer()->SetColor(GetBackdropColorByMode(mode));
 
   WindowState::Get(backdrop_window_)->set_allow_set_bounds_direct(true);
 }

ash/wm/workspace/backdrop_controller.h

@@ -11,6 +11,7 @@
 #include "ash/ash_export.h"
 #include "ash/public/cpp/tablet_mode_observer.h"
 #include "ash/public/cpp/wallpaper_controller_observer.h"
+#include "ash/public/cpp/window_properties.h"
 #include "ash/wm/overview/overview_observer.h"
 #include "ash/wm/splitview/split_view_controller.h"
 #include "ash/wm/splitview/split_view_observer.h"
@@ -94,7 +95,7 @@ class ASH_EXPORT BackdropController : public AccessibilityObserver,
 
   void UpdateBackdropInternal();
 
-  void EnsureBackdropWidget();
+  void EnsureBackdropWidget(BackdropWindowMode mode);
 
   void UpdateAccessibilityMode();
 

chrome/browser/ui/webui/signin/inline_login_handler_dialog_chromeos.cc

@@ -7,6 +7,7 @@
 #include <algorithm>
 #include <string>
 
+#include "ash/public/cpp/window_properties.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
@@ -66,6 +67,11 @@ void InlineLoginHandlerDialogChromeOS::Show(const std::string& email) {
   // Will be deleted by |SystemWebDialogDelegate::OnDialogClosed|.
   dialog = new InlineLoginHandlerDialogChromeOS(url);
   dialog->ShowSystemDialog();
+
+  // TODO(crbug.com/1016828): Remove/update this after the dialog behavior on
+  // Chrome OS is defined.
+  dialog->dialog_window()->SetProperty(
+      ash::kBackdropWindowMode, ash::BackdropWindowMode::kAutoSemiOpaque);
 }
 
 void InlineLoginHandlerDialogChromeOS::AdjustWidgetInitParams(

components/exo/client_controlled_shell_surface.cc

@@ -1153,7 +1153,7 @@ void ClientControlledShellSurface::UpdateBackdrop() {
 
   ash::BackdropWindowMode target_backdrop_mode =
       enable_backdrop ? ash::BackdropWindowMode::kEnabled
-                      : ash::BackdropWindowMode::kAuto;
+                      : ash::BackdropWindowMode::kAutoOpaque;
 
   if (window->GetProperty(ash::kBackdropWindowMode) != target_backdrop_mode)
     window->SetProperty(ash::kBackdropWindowMode, target_backdrop_mode);