Add A11y Slices

Add AccessibilityPreferenceController, which wraps all a11y settings
since they are share common infrastructure for enabling, current value,
and availability.

We add an overlay for OEMs to declare their bundled a11y services.
This is the only list of services that will be possible to enabled via
Settings slices.

Accessibility Slices are built by getting a list of valid services,
and indexing the service names as a key in the Slices DB. When they are
built at runtime, they use the generic A11yPrefController to get the status
and enable/disable the service.

Bug: 67997836
Bug: 67997672
Test: robotests
Change-Id: I66f905bf1c55eecb937945c4675c12bcbc96d698

src/com/android/settings/slices/SliceDataConverter.java

@@ -23,7 +23,12 @@ import static com.android.settings.core.PreferenceXmlParserUtils.METADATA_PLATFO
 import static com.android.settings.core.PreferenceXmlParserUtils.METADATA_SUMMARY;
 import static com.android.settings.core.PreferenceXmlParserUtils.METADATA_TITLE;
 
+import android.accessibilityservice.AccessibilityServiceInfo;
+import android.content.ComponentName;
 import android.content.Context;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.pm.ServiceInfo;
 import android.content.res.Resources;
 import android.content.res.XmlResourceParser;
 import android.os.Bundle;
@@ -32,9 +37,14 @@ import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.Xml;
+import android.view.accessibility.AccessibilityManager;
 
+import com.android.settings.accessibility.AccessibilitySlicePreferenceController;
 import com.android.settings.core.PreferenceXmlParserUtils;
 import com.android.settings.core.PreferenceXmlParserUtils.MetadataFlag;
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.settings.R;
+import com.android.settings.accessibility.AccessibilitySettings;
 import com.android.settings.dashboard.DashboardFragment;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.search.DatabaseIndexingUtils;
@@ -46,10 +56,16 @@ import org.xmlpull.v1.XmlPullParserException;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 /**
- * Converts {@link DashboardFragment} to {@link SliceData}.
+ * Converts all Slice sources into {@link SliceData}.
+ * This includes:
+ * - All {@link DashboardFragment DashboardFragments} indexed by settings search
+ * - Accessibility services
  */
 class SliceDataConverter {
 
@@ -101,6 +117,8 @@ class SliceDataConverter {
             mSliceData.addAll(providerSliceData);
         }
 
+        final List<SliceData> a11ySliceData = getAccessibilitySliceData();
+        mSliceData.addAll(a11ySliceData);
         return mSliceData;
     }
 
@@ -208,4 +226,58 @@ class SliceDataConverter {
         }
         return xmlSliceData;
     }
+
+    private List<SliceData> getAccessibilitySliceData() {
+        final List<SliceData> sliceData = new ArrayList<>();
+
+        final String accessibilityControllerClassName =
+                AccessibilitySlicePreferenceController.class.getName();
+        final String fragmentClassName = AccessibilitySettings.class.getName();
+        final CharSequence screenTitle = mContext.getText(R.string.accessibility_settings);
+
+        final SliceData.Builder sliceDataBuilder = new SliceData.Builder()
+                .setFragmentName(fragmentClassName)
+                .setScreenTitle(screenTitle)
+                .setPreferenceControllerClassName(accessibilityControllerClassName);
+
+        final Set<String> a11yServiceNames = new HashSet<>();
+        Collections.addAll(a11yServiceNames, mContext.getResources()
+                .getStringArray(R.array.config_settings_slices_accessibility_components));
+        final List<AccessibilityServiceInfo> installedServices = getAccessibilityServiceInfoList();
+        final PackageManager packageManager = mContext.getPackageManager();
+
+        for (AccessibilityServiceInfo a11yServiceInfo : installedServices) {
+            final ResolveInfo resolveInfo = a11yServiceInfo.getResolveInfo();
+            final ServiceInfo serviceInfo = resolveInfo.serviceInfo;
+            final String packageName = serviceInfo.packageName;
+            final ComponentName componentName = new ComponentName(packageName, serviceInfo.name);
+            final String flattenedName = componentName.flattenToString();
+
+            if (!a11yServiceNames.contains(flattenedName)) {
+                continue;
+            }
+
+            final String title = resolveInfo.loadLabel(packageManager).toString();
+            int iconResource = resolveInfo.getIconResource();
+            if (iconResource == 0) {
+                iconResource = R.mipmap.ic_accessibility_generic;
+            }
+
+            sliceDataBuilder.setKey(flattenedName)
+                    .setTitle(title)
+                    .setIcon(iconResource)
+                    .setSliceType(SliceData.SliceType.SWITCH);
+
+            sliceData.add(sliceDataBuilder.build());
+        }
+
+        return sliceData;
+    }
+
+    @VisibleForTesting
+    List<AccessibilityServiceInfo> getAccessibilityServiceInfoList() {
+        final AccessibilityManager accessibilityManager = AccessibilityManager.getInstance(
+                mContext);
+        return accessibilityManager.getInstalledAccessibilityServiceList();
+    }
 }