Update magnifier focus for focus changes in Arc windows.

This requires intents to ensure the ArcAccessibilityHelperService
is enabled in Android, and the editability of the control to be passed
through to the MagnificationManager.

To work with no other accessibility features are enabled, this also
requires the Android side change: http://ag/12532278

This change will still be safe to merge without that change, as the
intents will just be ignored.

BUG=b:167133958
TEST=Manual (tab around apps and observe magnifier,
enable and disable magnifier and other accessibility features)
R=hirokisato@chromium.org, sarakato@chromium.org
AX-Relnotes: Magnifier now follows focus in Android apps.

Change-Id: I2fd1a7145be3475a9c288715c4d442f6bc035c57
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2389802
Commit-Queue: Matthew Duggan <mduggan@chromium.org>
Reviewed-by: David Tseng <dtseng@chromium.org>
Reviewed-by: David Jacobo <djacobo@chromium.org>
Reviewed-by: Sara Kato <sarakato@chromium.org>
Reviewed-by: Hiroki Sato <hirokisato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806904}

chrome/browser/chromeos/accessibility/accessibility_manager.cc

@@ -507,9 +507,14 @@ void AccessibilityManager::OnLocaleChanged() {
   EnableSpokenFeedback(true);
 }
 
-void AccessibilityManager::OnViewFocusedInArc(
-    const gfx::Rect& bounds_in_screen) {
+void AccessibilityManager::OnViewFocusedInArc(const gfx::Rect& bounds_in_screen,
+                                              bool is_editable) {
   ash::AccessibilityController::Get()->SetFocusHighlightRect(bounds_in_screen);
+
+  MagnificationManager* magnification_manager = MagnificationManager::Get();
+  if (magnification_manager)
+    magnification_manager->HandleFocusedRectChangedIfEnabled(bounds_in_screen,
+                                                             is_editable);
 }
 
 bool AccessibilityManager::PlayEarcon(int sound_key, PlaySoundOption option) {

chrome/browser/chromeos/accessibility/accessibility_manager.h

@@ -253,8 +253,8 @@ class AccessibilityManager
   // Play tick sound indicating spoken feedback will be toggled after countdown.
   bool PlaySpokenFeedbackToggleCountdown(int tick_count);
 
-  // Notify that a view is focused in arc.
-  void OnViewFocusedInArc(const gfx::Rect& bounds_in_screen);
+  // Update when a view is focused in ARC++.
+  void OnViewFocusedInArc(const gfx::Rect& bounds_in_screen, bool is_editable);
 
   // Plays an earcon. Earcons are brief and distinctive sounds that indicate
   // the their mapped event has occurred. The |sound_key| enums can be found in

chrome/browser/chromeos/accessibility/magnification_manager.cc

@@ -99,6 +99,15 @@ void MagnificationManager::OnProfileWillBeDestroyed(Profile* profile) {
   SetProfile(nullptr);
 }
 
+void MagnificationManager::HandleFocusedRectChangedIfEnabled(
+    const gfx::Rect& bounds_in_screen,
+    bool is_editable) {
+  if (!fullscreen_magnifier_enabled_ && !IsDockedMagnifierEnabled())
+    return;
+
+  HandleFocusChanged(bounds_in_screen, is_editable);
+}
+
 void MagnificationManager::OnViewEvent(views::View* view,
                                        ax::mojom::Event event_type) {
   if (!fullscreen_magnifier_enabled_ && !IsDockedMagnifierEnabled())

chrome/browser/chromeos/accessibility/magnification_manager.h

@@ -64,6 +64,10 @@ class MagnificationManager
   // Loads the Fullscreen magnifier scale from the pref.
   double GetSavedScreenMagnifierScale() const;
 
+  // Updates for a new focus rect (eg, from ARC++) if a magnifier is enabled.
+  void HandleFocusedRectChangedIfEnabled(const gfx::Rect& bounds_in_screen,
+                                         bool is_editable);
+
   // ProfileObserver:
   void OnProfileWillBeDestroyed(Profile* profile) override;
 

chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.cc

@@ -13,6 +13,7 @@
 #include "base/command_line.h"
 #include "base/memory/singleton.h"
 #include "base/metrics/histogram_functions.h"
+#include "chrome/browser/chromeos/accessibility/magnification_manager.h"
 #include "chrome/browser/chromeos/arc/accessibility/arc_accessibility_util.h"
 #include "chrome/browser/chromeos/arc/accessibility/geometry_util.h"
 #include "chrome/browser/profiles/profile.h"
@@ -96,7 +97,10 @@ void DispatchFocusChange(arc::mojom::AccessibilityNodeInfoData* node_data,
       node_data->bounds_in_screen,
       views::Widget::GetWidgetForNativeView(active_window)));
 
-  accessibility_manager->OnViewFocusedInArc(bounds_in_screen);
+  bool is_editable = arc::GetBooleanProperty(
+      node_data, arc::mojom::AccessibilityBooleanProperty::EDITABLE);
+
+  accessibility_manager->OnViewFocusedInArc(bounds_in_screen, is_editable);
 }
 
 void SetChildAxTreeIDForWindow(aura::Window* window,
@@ -613,7 +617,10 @@ arc::mojom::AccessibilityFilterType
 ArcAccessibilityHelperBridge::GetFilterTypeForProfile(Profile* profile) {
   chromeos::AccessibilityManager* accessibility_manager =
       chromeos::AccessibilityManager::Get();
-  if (!accessibility_manager)
+  const chromeos::MagnificationManager* magnification_manager =
+      chromeos::MagnificationManager::Get();
+
+  if (!accessibility_manager || !magnification_manager)
     return arc::mojom::AccessibilityFilterType::OFF;
 
   // TODO(yawano): Support the case where primary user is in background.
@@ -626,8 +633,12 @@ ArcAccessibilityHelperBridge::GetFilterTypeForProfile(Profile* profile) {
     return arc::mojom::AccessibilityFilterType::ALL;
   }
 
-  if (accessibility_manager->IsFocusHighlightEnabled())
+  if (magnification_manager->IsMagnifierEnabled() ||
+      magnification_manager->IsDockedMagnifierEnabled() ||
+      accessibility_manager->IsFocusHighlightEnabled()) {
     return arc::mojom::AccessibilityFilterType::FOCUS;
+  }
+
   return arc::mojom::AccessibilityFilterType::OFF;
 }
 
@@ -694,7 +705,11 @@ void ArcAccessibilityHelperBridge::OnAccessibilityStatusChanged(
       event_details.notification_type !=
           chromeos::ACCESSIBILITY_TOGGLE_SPOKEN_FEEDBACK &&
       event_details.notification_type !=
-          chromeos::ACCESSIBILITY_TOGGLE_SWITCH_ACCESS) {
+          chromeos::ACCESSIBILITY_TOGGLE_SWITCH_ACCESS &&
+      event_details.notification_type !=
+          chromeos::ACCESSIBILITY_TOGGLE_DOCKED_MAGNIFIER &&
+      event_details.notification_type !=
+          chromeos::ACCESSIBILITY_TOGGLE_SCREEN_MAGNIFIER) {
     return;
   }
 
@@ -708,27 +723,33 @@ void ArcAccessibilityHelperBridge::OnAccessibilityStatusChanged(
 }
 
 void ArcAccessibilityHelperBridge::UpdateEnabledFeature() {
-  arc::mojom::AccessibilityFilterType new_filter_type_ =
+  arc::mojom::AccessibilityFilterType new_filter_type =
       GetFilterTypeForProfile(profile_);
   // Clear trees when filter type is changed to non-ALL.
-  if (filter_type_ != new_filter_type_ &&
-      new_filter_type_ != arc::mojom::AccessibilityFilterType::ALL) {
+
+  if (filter_type_ != new_filter_type &&
+      new_filter_type != arc::mojom::AccessibilityFilterType::ALL) {
     trees_.clear();
   }
-  filter_type_ = new_filter_type_;
+  filter_type_ = new_filter_type;
 
   auto* instance = ARC_GET_INSTANCE_FOR_METHOD(
       arc_bridge_service_->accessibility_helper(), SetFilter);
   if (instance)
     instance->SetFilter(filter_type_);
 
-  chromeos::AccessibilityManager* accessibility_manager =
+  const chromeos::AccessibilityManager* accessibility_manager =
       chromeos::AccessibilityManager::Get();
-  if (!accessibility_manager)
+  const chromeos::MagnificationManager* magnification_manager =
+      chromeos::MagnificationManager::Get();
+
+  if (!accessibility_manager || !magnification_manager)
     return;
 
-  is_focus_highlight_enabled_ =
-      accessibility_manager->IsFocusHighlightEnabled();
+  is_focus_event_enabled_ = magnification_manager->IsMagnifierEnabled() ||
+                            magnification_manager->IsDockedMagnifierEnabled() ||
+                            accessibility_manager->IsFocusHighlightEnabled();
+
   use_full_focus_mode_ = accessibility_manager->IsSwitchAccessEnabled() ||
                          accessibility_manager->IsSpokenFeedbackEnabled();
 
@@ -923,7 +944,7 @@ void ArcAccessibilityHelperBridge::HandleFilterTypeAllEvent(
     UpdateWindowProperties(GetActiveWindow());
   }
 
-  if (is_focus_highlight_enabled_ &&
+  if (is_focus_event_enabled_ &&
       event_data->event_type ==
           arc::mojom::AccessibilityEventType::VIEW_FOCUSED) {
     for (size_t i = 0; i < event_data->node_data.size(); ++i) {

chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.h

@@ -177,7 +177,7 @@ class ArcAccessibilityHelperBridge
   AXTreeSourceArc* GetFromTreeId(ui::AXTreeID tree_id) const;
 
   bool activation_observer_added_ = false;
-  bool is_focus_highlight_enabled_ = false;
+  bool is_focus_event_enabled_ = false;
   bool use_full_focus_mode_ = false;
   Profile* const profile_;
   ArcBridgeService* const arc_bridge_service_;

chrome/browser/chromeos/arc/intent_helper/arc_settings_service.cc

@@ -170,6 +170,7 @@ class ArcSettingsServiceImpl
   void SyncAccessibilityLargeMouseCursorEnabled() const;
   void SyncAccessibilityVirtualKeyboardEnabled() const;
   void SyncBackupEnabled() const;
+  void SyncDockedMagnifierEnabled() const;
   void SyncFocusHighlightEnabled() const;
   void SyncLocale() const;
   void SyncLocationServiceEnabled() const;
@@ -178,6 +179,7 @@ class ArcSettingsServiceImpl
   void SyncProxySettingsForSystemProxy() const;
   void SyncReportingConsent(bool initial_sync) const;
   void SyncPictureInPictureEnabled() const;
+  void SyncScreenMagnifierEnabled() const;
   void SyncSelectToSpeakEnabled() const;
   void SyncSpokenFeedbackEnabled() const;
   void SyncSwitchAccessEnabled() const;
@@ -273,6 +275,8 @@ void ArcSettingsServiceImpl::OnPrefChanged(const std::string& pref_name) const {
     SyncFocusHighlightEnabled();
   } else if (pref_name == ash::prefs::kAccessibilityLargeCursorEnabled) {
     SyncAccessibilityLargeMouseCursorEnabled();
+  } else if (pref_name == ash::prefs::kAccessibilityScreenMagnifierEnabled) {
+    SyncScreenMagnifierEnabled();
   } else if (pref_name == ash::prefs::kAccessibilitySelectToSpeakEnabled) {
     SyncSelectToSpeakEnabled();
   } else if (pref_name == ash::prefs::kAccessibilitySpokenFeedbackEnabled) {
@@ -281,6 +285,8 @@ void ArcSettingsServiceImpl::OnPrefChanged(const std::string& pref_name) const {
     SyncSwitchAccessEnabled();
   } else if (pref_name == ash::prefs::kAccessibilityVirtualKeyboardEnabled) {
     SyncAccessibilityVirtualKeyboardEnabled();
+  } else if (pref_name == ash::prefs::kDockedMagnifierEnabled) {
+    SyncDockedMagnifierEnabled();
   } else if (pref_name == ::language::prefs::kApplicationLocale ||
              pref_name == ::language::prefs::kPreferredLanguages) {
     SyncLocale();
@@ -344,10 +350,12 @@ void ArcSettingsServiceImpl::StartObservingSettingsChanges() {
   // Keep these lines ordered lexicographically.
   AddPrefToObserve(ash::prefs::kAccessibilityFocusHighlightEnabled);
   AddPrefToObserve(ash::prefs::kAccessibilityLargeCursorEnabled);
+  AddPrefToObserve(ash::prefs::kAccessibilityScreenMagnifierEnabled);
   AddPrefToObserve(ash::prefs::kAccessibilitySelectToSpeakEnabled);
   AddPrefToObserve(ash::prefs::kAccessibilitySpokenFeedbackEnabled);
   AddPrefToObserve(ash::prefs::kAccessibilitySwitchAccessEnabled);
   AddPrefToObserve(ash::prefs::kAccessibilityVirtualKeyboardEnabled);
+  AddPrefToObserve(ash::prefs::kDockedMagnifierEnabled);
   AddPrefToObserve(::prefs::kResolveTimezoneByGeolocationMethod);
   AddPrefToObserve(::prefs::kSystemProxyUserTrafficHostAndPort);
   AddPrefToObserve(::prefs::kUse24HourClock);
@@ -390,10 +398,12 @@ void ArcSettingsServiceImpl::SyncBootTimeSettings() const {
   // Keep these lines ordered lexicographically.
   SyncAccessibilityLargeMouseCursorEnabled();
   SyncAccessibilityVirtualKeyboardEnabled();
+  SyncDockedMagnifierEnabled();
   SyncFocusHighlightEnabled();
   SyncProxySettings();
   SyncReportingConsent(/*initial_sync=*/false);
   SyncPictureInPictureEnabled();
+  SyncScreenMagnifierEnabled();
   SyncSelectToSpeakEnabled();
   SyncSpokenFeedbackEnabled();
   SyncSwitchAccessEnabled();
@@ -457,6 +467,18 @@ void ArcSettingsServiceImpl::SyncFocusHighlightEnabled() const {
       "org.chromium.arc.intent_helper.SET_FOCUS_HIGHLIGHT_ENABLED");
 }
 
+void ArcSettingsServiceImpl::SyncScreenMagnifierEnabled() const {
+  SendBoolPrefSettingsBroadcast(
+      ash::prefs::kAccessibilityScreenMagnifierEnabled,
+      "org.chromium.arc.intent_helper.SET_SCREEN_MAGNIFIER_ENABLED");
+}
+
+void ArcSettingsServiceImpl::SyncDockedMagnifierEnabled() const {
+  SendBoolPrefSettingsBroadcast(
+      ash::prefs::kDockedMagnifierEnabled,
+      "org.chromium.arc.intent_helper.SET_DOCKED_MAGNIFIER_ENABLED");
+}
+
 void ArcSettingsServiceImpl::SyncLocale() const {
   if (IsArcLocaleSyncDisabled()) {
     VLOG(1) << "Locale sync is disabled.";