Add the preference controller to control accessibility button size preference

cherry picked from commit 04955b96ae

Bug: 173940869
Test: atest FloatingMenuSizePreferenceControllerTest
Change-Id: Ic206a940abde90641442df37a634c8cb3a345597
Merged-In: Ic206a940abde90641442df37a634c8cb3a345597

res/xml/accessibility_button_settings.xml

@@ -34,7 +34,8 @@
         android:key="accessibility_button_size"
         android:title="@string/accessibility_button_size_title"
         android:summary="%s"
-        android:persistent="false"/>
+        android:persistent="false"
+        settings:controller="com.android.settings.accessibility.FloatingMenuSizePreferenceController"/>
 
     <SwitchPreference
         android:key="accessibility_button_fade"

src/com/android/settings/accessibility/AccessibilityUtil.java

@@ -16,6 +16,7 @@
 
 package com.android.settings.accessibility;
 
+import static android.provider.Settings.Secure.ACCESSIBILITY_BUTTON_MODE_FLOATING_MENU;
 import static android.view.WindowManagerPolicyConstants.NAV_BAR_MODE_GESTURAL;
 
 import android.accessibilityservice.AccessibilityServiceInfo;
@@ -143,6 +144,13 @@ final class AccessibilityUtil {
                 == NAV_BAR_MODE_GESTURAL;
     }
 
+    /** Determines if a accessibility floating menu is being used. */
+    public static boolean isFloatingMenuEnabled(Context context) {
+        return Settings.Secure.getInt(context.getContentResolver(),
+                Settings.Secure.ACCESSIBILITY_BUTTON_MODE, /* def= */ -1)
+                == ACCESSIBILITY_BUTTON_MODE_FLOATING_MENU;
+    }
+
     /** Determines if a touch explore is being used. */
     public static boolean isTouchExploreEnabled(Context context) {
         final AccessibilityManager am = context.getSystemService(AccessibilityManager.class);

src/com/android/settings/accessibility/FloatingMenuSizePreferenceController.java

@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.accessibility;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.database.ContentObserver;
+import android.os.Handler;
+import android.os.Looper;
+import android.provider.Settings;
+import android.util.ArrayMap;
+
+import androidx.annotation.IntDef;
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.ListPreference;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnPause;
+import com.android.settingslib.core.lifecycle.events.OnResume;
+
+import com.google.common.primitives.Ints;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/** Preference controller that controls the preferred size in accessibility button page. */
+public class FloatingMenuSizePreferenceController extends BasePreferenceController
+        implements Preference.OnPreferenceChangeListener, LifecycleObserver, OnResume, OnPause {
+
+    private final ContentResolver mContentResolver;
+    @VisibleForTesting
+    final ContentObserver mContentObserver;
+
+    @VisibleForTesting
+    ListPreference mPreference;
+
+    private final ArrayMap<String, String> mValueTitleMap = new ArrayMap<>();
+    private int mDefaultSize;
+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({
+            Size.SMALL,
+            Size.LARGE,
+            Size.EDGE
+    })
+    @VisibleForTesting
+    @interface Size {
+        int SMALL = 0;
+        int LARGE = 1;
+        int EDGE = 2;
+    }
+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({
+            EdgeMode.FULL_CIRCLE,
+            EdgeMode.HALF_CIRCLE,
+    })
+    @VisibleForTesting
+    @interface EdgeMode {
+        int FULL_CIRCLE = 0;
+        int HALF_CIRCLE = 1;
+    }
+
+    public FloatingMenuSizePreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+        mContentResolver = context.getContentResolver();
+        mContentObserver = new ContentObserver(new Handler(Looper.getMainLooper())) {
+            @Override
+            public void onChange(boolean selfChange) {
+                updateAvailabilityStatus();
+            }
+        };
+
+        initValueTitleMap();
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AccessibilityUtil.isFloatingMenuEnabled(mContext)
+                ? AVAILABLE : DISABLED_DEPENDENT_SETTING;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final ListPreference listPreference = (ListPreference) preference;
+        final Integer value = Ints.tryParse((String) newValue);
+        if (value != null) {
+            writeToFloatingMenuSettings(value);
+            updateState(listPreference);
+        }
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        final ListPreference listPreference = (ListPreference) preference;
+
+        listPreference.setValue(getCurrentAccessibilityButtonSize());
+    }
+
+    @Override
+    public void onResume() {
+        mContentResolver.registerContentObserver(
+                Settings.Secure.getUriFor(
+                        Settings.Secure.ACCESSIBILITY_BUTTON_MODE), /* notifyForDescendants= */
+                false, mContentObserver);
+
+    }
+
+    @Override
+    public void onPause() {
+        mContentResolver.unregisterContentObserver(mContentObserver);
+    }
+
+    private void updateAvailabilityStatus() {
+        mPreference.setEnabled(AccessibilityUtil.isFloatingMenuEnabled(mContext));
+    }
+
+    private void initValueTitleMap() {
+        if (mValueTitleMap.size() == 0) {
+            final String[] values = mContext.getResources().getStringArray(
+                    R.array.accessibility_button_size_selector_values);
+            final String[] titles = mContext.getResources().getStringArray(
+                    R.array.accessibility_button_size_selector_titles);
+            final int mapSize = values.length;
+
+            mDefaultSize = Integer.parseInt(values[0]);
+            for (int i = 0; i < mapSize; i++) {
+                mValueTitleMap.put(values[i], titles[i]);
+            }
+        }
+    }
+
+    private void writeToFloatingMenuSettings(@Size int sizeValue) {
+        if (sizeValue == Size.EDGE) {
+            putAccessibilityFloatingMenuSize(Size.SMALL);
+            putAccessibilityFloatingMenuIconType(EdgeMode.HALF_CIRCLE);
+        } else {
+            putAccessibilityFloatingMenuSize(sizeValue);
+            putAccessibilityFloatingMenuIconType(EdgeMode.FULL_CIRCLE);
+        }
+    }
+
+    private String getCurrentAccessibilityButtonSize() {
+        final @EdgeMode int iconType = getAccessibilityFloatingMenuIconType(EdgeMode.FULL_CIRCLE);
+        final @Size int btnSize = getAccessibilityFloatingMenuSize(mDefaultSize);
+
+        return (iconType == EdgeMode.HALF_CIRCLE)
+                ? String.valueOf(Size.EDGE) : String.valueOf(btnSize);
+    }
+
+    @Size
+    private int getAccessibilityFloatingMenuSize(@Size int defaultValue) {
+        return Settings.Secure.getInt(mContentResolver,
+                Settings.Secure.ACCESSIBILITY_FLOATING_MENU_SIZE, defaultValue);
+    }
+
+    private void putAccessibilityFloatingMenuSize(@Size int value) {
+        Settings.Secure.putInt(mContentResolver,
+                Settings.Secure.ACCESSIBILITY_FLOATING_MENU_SIZE, value);
+    }
+
+    @EdgeMode
+    private int getAccessibilityFloatingMenuIconType(@EdgeMode int defaultValue) {
+        return Settings.Secure.getInt(mContentResolver,
+                Settings.Secure.ACCESSIBILITY_FLOATING_MENU_ICON_TYPE, defaultValue);
+    }
+
+    private void putAccessibilityFloatingMenuIconType(@EdgeMode int value) {
+        Settings.Secure.putInt(mContentResolver,
+                Settings.Secure.ACCESSIBILITY_FLOATING_MENU_ICON_TYPE, value);
+    }
+}

tests/robotests/src/com/android/settings/accessibility/FloatingMenuSizePreferenceControllerTest.java

@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.accessibility;
+
+import static android.provider.Settings.Secure.ACCESSIBILITY_BUTTON_MODE_FLOATING_MENU;
+import static android.provider.Settings.Secure.ACCESSIBILITY_BUTTON_MODE_NAVIGATION_BAR;
+
+import static com.android.settings.core.BasePreferenceController.AVAILABLE;
+import static com.android.settings.core.BasePreferenceController.DISABLED_DEPENDENT_SETTING;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.provider.Settings;
+
+import androidx.preference.ListPreference;
+import androidx.test.core.app.ApplicationProvider;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.Spy;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+import org.robolectric.RobolectricTestRunner;
+
+/** Tests for {@link FloatingMenuSizePreferenceController}. */
+@RunWith(RobolectricTestRunner.class)
+public class FloatingMenuSizePreferenceControllerTest {
+
+    @Rule
+    public MockitoRule mocks = MockitoJUnit.rule();
+
+    @Spy
+    private final Context mContext = ApplicationProvider.getApplicationContext();
+    @Mock
+    private ContentResolver mContentResolver;
+    private final ListPreference mListPreference = new ListPreference(mContext);
+    private FloatingMenuSizePreferenceController mController;
+
+    @Before
+    public void setUp() {
+        when(mContext.getContentResolver()).thenReturn(mContentResolver);
+        mController = new FloatingMenuSizePreferenceController(mContext, "test_key");
+    }
+
+    @Test
+    public void getAvailabilityStatus_a11yBtnModeFloatingMenu_returnAvailable() {
+        Settings.Secure.putInt(mContentResolver, Settings.Secure.ACCESSIBILITY_BUTTON_MODE,
+                ACCESSIBILITY_BUTTON_MODE_FLOATING_MENU);
+
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(AVAILABLE);
+    }
+
+    @Test
+    public void getAvailabilityStatus_a11yBtnModeNavigationBar_returnDisabledDependentSetting() {
+        Settings.Secure.putInt(mContentResolver, Settings.Secure.ACCESSIBILITY_BUTTON_MODE,
+                ACCESSIBILITY_BUTTON_MODE_NAVIGATION_BAR);
+
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(DISABLED_DEPENDENT_SETTING);
+    }
+
+    @Test
+    public void updateState_floatingMenuLargeSizeAndFullCircle_largeSizeValue() {
+        Settings.Secure.putInt(mContentResolver, Settings.Secure.ACCESSIBILITY_FLOATING_MENU_SIZE,
+                FloatingMenuSizePreferenceController.Size.LARGE);
+        Settings.Secure.putInt(mContentResolver,
+                Settings.Secure.ACCESSIBILITY_FLOATING_MENU_ICON_TYPE,
+                FloatingMenuSizePreferenceController.EdgeMode.FULL_CIRCLE);
+
+        mController.updateState(mListPreference);
+
+        final String largeSize = String.valueOf(FloatingMenuSizePreferenceController.Size.LARGE);
+        assertThat(mListPreference.getValue()).isEqualTo(largeSize);
+    }
+
+    @Test
+    public void updateState_floatingMenuHalfCircle_edgeSizeValue() {
+        Settings.Secure.putInt(mContentResolver,
+                Settings.Secure.ACCESSIBILITY_FLOATING_MENU_ICON_TYPE,
+                FloatingMenuSizePreferenceController.EdgeMode.HALF_CIRCLE);
+
+        mController.updateState(mListPreference);
+
+        final String edgeSize = String.valueOf(FloatingMenuSizePreferenceController.Size.EDGE);
+        assertThat(mListPreference.getValue()).isEqualTo(edgeSize);
+    }
+
+    @Test
+    public void onPreferenceChange_floatingMenuEdgeSize_edgeSizeValue() {
+        final String edgeSize = String.valueOf(
+                FloatingMenuSizePreferenceController.Size.EDGE);
+
+        mController.onPreferenceChange(mListPreference, edgeSize);
+
+        assertThat(mListPreference.getValue()).isEqualTo(edgeSize);
+    }
+
+    @Test
+    public void onChange_a11yBtnModeChangeToNavigationBar_preferenceDisabled() {
+        mController.mPreference = mListPreference;
+        Settings.Secure.putInt(mContentResolver, Settings.Secure.ACCESSIBILITY_BUTTON_MODE,
+                ACCESSIBILITY_BUTTON_MODE_NAVIGATION_BAR);
+
+        mController.mContentObserver.onChange(false);
+
+        assertThat(mController.mPreference.isEnabled()).isFalse();
+    }
+
+    @Test
+    public void onResume_registerSpecificContentObserver() {
+        mController.onResume();
+
+        verify(mContentResolver).registerContentObserver(
+                Settings.Secure.getUriFor(Settings.Secure.ACCESSIBILITY_BUTTON_MODE), false,
+                mController.mContentObserver);
+    }
+
+    @Test
+    public void onPause_unregisterContentObserver() {
+        mController.onPause();
+
+        verify(mContentResolver).unregisterContentObserver(mController.mContentObserver);
+    }
+}