Repurpose the blurs dev option for window blurs

Bug: 185580298
Test: make RunSettingsRoboTests ROBOTEST_FILTER=EnabledBlursPreferenceControllerTest
Change-Id: I12e356c4a2997bf67580652e7d3fff9bb89483ac

res/values/strings.xml

@@ -12896,9 +12896,7 @@
     <string name="hwui_force_dark_summary">Overrides the force-dark feature to be always-on</string>
 
     <!-- If blurs are supported on SurfaceFlinger. [CHAR LIMIT=60] -->
-    <string name="enable_blurs_on_windows_title">Enable blurs</string>
+    <string name="enable_blurs_on_windows_title">Window-level blurs</string>
-    <!-- If blurs are supported on SurfaceFlinger, summary. [CHAR LIMIT=NONE] -->
-    <string name="enable_blurs_on_windows_summary">Enables window blurs at compositor level. Requires device reboot.</string>
 
     <!-- Title for the top level Privacy Settings [CHAR LIMIT=30]-->
     <string name="privacy_dashboard_title">Privacy</string>

res/xml/development_settings.xml

@@ -492,8 +492,7 @@
 
         <SwitchPreference
             android:key="enable_blurs_on_windows"
-            android:title="@string/enable_blurs_on_windows_title"
+            android:title="@string/enable_blurs_on_windows_title"/>
-            android:summary="@string/enable_blurs_on_windows_summary" />
 
         <SwitchPreference
             android:key="force_msaa"

src/com/android/settings/development/EnableBlursPreferenceController.java

@@ -16,8 +16,10 @@
 
 package com.android.settings.development;
 
+import static android.view.CrossWindowBlurListeners.CROSS_WINDOW_BLUR_SUPPORTED;
+
 import android.content.Context;
-import android.os.SystemProperties;
+import android.provider.Settings;
 
 import androidx.annotation.VisibleForTesting;
 import androidx.preference.Preference;
@@ -25,22 +27,18 @@ import androidx.preference.SwitchPreference;
 
 import com.android.settings.core.PreferenceControllerMixin;
 import com.android.settingslib.development.DeveloperOptionsPreferenceController;
-import com.android.settingslib.development.SystemPropPoker;
 
 /**
- * Controller that toggles window blurs on SurfaceFlinger on devices that support it.
+ * Controller that toggles window blurs on devices that support it.
  */
 public final class EnableBlursPreferenceController extends DeveloperOptionsPreferenceController
         implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin {
 
-    @VisibleForTesting
-    static final String DISABLE_BLURS_SYSPROP = "persist.sys.sf.disable_blurs";
     private static final String ENABLE_BLURS_ON_WINDOWS = "enable_blurs_on_windows";
     private final boolean mBlurSupported;
 
     public EnableBlursPreferenceController(Context context) {
-        this(context, SystemProperties
+        this(context, CROSS_WINDOW_BLUR_SUPPORTED);
-                .getBoolean("ro.surface_flinger.supports_background_blur", false));
     }
 
     @VisibleForTesting
@@ -56,9 +54,9 @@ public final class EnableBlursPreferenceController extends DeveloperOptionsPrefe
 
     @Override
     public boolean onPreferenceChange(Preference preference, Object newValue) {
-        final boolean isDisabled = !(Boolean) newValue;
+        boolean enabled = (Boolean) newValue;
-        SystemProperties.set(DISABLE_BLURS_SYSPROP, isDisabled ? "1" : "0");
+        Settings.Global.putInt(mContext.getContentResolver(),
-        SystemPropPoker.getInstance().poke();
+                Settings.Global.DISABLE_WINDOW_BLURS, enabled ? 0 : 1);
         return true;
     }
 
@@ -69,15 +67,16 @@ public final class EnableBlursPreferenceController extends DeveloperOptionsPrefe
 
     @Override
     public void updateState(Preference preference) {
-        boolean isEnabled = !SystemProperties.getBoolean(
+        boolean isEnabled = Settings.Global.getInt(mContext.getContentResolver(),
-                DISABLE_BLURS_SYSPROP, false /* default */);
+                    Settings.Global.DISABLE_WINDOW_BLURS, 0) == 0;
         ((SwitchPreference) mPreference).setChecked(isEnabled);
     }
 
     @Override
     protected void onDeveloperOptionsSwitchDisabled() {
         super.onDeveloperOptionsSwitchDisabled();
-        SystemProperties.set(DISABLE_BLURS_SYSPROP, null);
+        Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.DISABLE_WINDOW_BLURS, 0);
         updateState(null);
     }
 }

tests/robotests/src/com/android/settings/development/EnableBlursPreferenceControllerTest.java

@@ -23,7 +23,7 @@ import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 import android.content.Context;
-import android.os.SystemProperties;
+import android.provider.Settings;
 
 import androidx.preference.PreferenceScreen;
 import androidx.preference.SwitchPreference;
@@ -65,26 +65,25 @@ public final class EnableBlursPreferenceControllerTest {
     public void onPreferenceChanged_settingEnabled_enableBlurs() {
         mController.onPreferenceChange(mPreference, true /* new value */);
 
-        final boolean mode = SystemProperties
+        final boolean blursDisabled = Settings.Global.getInt(mContext.getContentResolver(),
-                .getBoolean(EnableBlursPreferenceController.DISABLE_BLURS_SYSPROP,
+                Settings.Global.DISABLE_WINDOW_BLURS, 0) == 1;
-                        false /* default */);
+        assertThat(blursDisabled).isFalse();
-        assertThat(mode).isFalse();
     }
 
     @Test
     public void onPreferenceChanged_settingDisabled_disableBlurs() {
         mController.onPreferenceChange(mPreference, false /* new value */);
 
-        final boolean mode = SystemProperties
+        final boolean blursDisabled = Settings.Global.getInt(mContext.getContentResolver(),
-                .getBoolean(EnableBlursPreferenceController.DISABLE_BLURS_SYSPROP,
+                Settings.Global.DISABLE_WINDOW_BLURS, 0) == 1;
-                        false /* default */);
 
-        assertThat(mode).isTrue();
+        assertThat(blursDisabled).isTrue();
     }
 
     @Test
     public void updateState_settingEnabled_preferenceShouldNotBeChecked() {
-        SystemProperties.set(EnableBlursPreferenceController.DISABLE_BLURS_SYSPROP, "1");
+        Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.DISABLE_WINDOW_BLURS, 1);
         mController.updateState(mPreference);
 
         verify(mPreference).setChecked(false);
@@ -92,7 +91,8 @@ public final class EnableBlursPreferenceControllerTest {
 
     @Test
     public void updateState_settingDisabled_preferenceShouldBeChecked() {
-        SystemProperties.set(EnableBlursPreferenceController.DISABLE_BLURS_SYSPROP, "0");
+        Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.DISABLE_WINDOW_BLURS, 0);
         mController.updateState(mPreference);
 
         verify(mPreference).setChecked(true);