Add the preference controller to control accessibility button location preference

cherry picked from commit 123464429d

Bug: 173940869
Test: atest AccessibilityButtonLocationPreferenceControllerTest
Change-Id: I49a23b2eb4e07e79afcefc5a148c23b06396ec1c
Merged-In: I49a23b2eb4e07e79afcefc5a148c23b06396ec1c

res/xml/accessibility_button_settings.xml

@@ -25,7 +25,8 @@
         android:key="accessibility_button_location"
         android:title="@string/accessibility_button_location_title"
         android:summary="%s"
-        android:persistent="false"/>
+        android:persistent="false"
+        settings:controller="com.android.settings.accessibility.AccessibilityButtonLocationPreferenceController"/>
 
     <ListPreference
         android:entries="@array/accessibility_button_size_selector_titles"

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

@@ -0,0 +1,89 @@
+/*
+ * 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.Context;
+import android.provider.Settings;
+import android.util.ArrayMap;
+
+import androidx.preference.ListPreference;
+import androidx.preference.Preference;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+
+import com.google.common.primitives.Ints;
+
+/** Preference controller that controls the preferred location in accessibility button page. */
+public class AccessibilityButtonLocationPreferenceController extends BasePreferenceController
+        implements Preference.OnPreferenceChangeListener {
+
+    private final ArrayMap<String, String> mValueTitleMap = new ArrayMap<>();
+    private int mDefaultLocation;
+
+    public AccessibilityButtonLocationPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+        initValueTitleMap();
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AccessibilityUtil.isGestureNavigateEnabled(mContext)
+                ? DISABLED_DEPENDENT_SETTING : AVAILABLE;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final ListPreference listPreference = (ListPreference) preference;
+        final Integer value = Ints.tryParse((String) newValue);
+        if (value != null) {
+            Settings.Secure.putInt(mContext.getContentResolver(),
+                    Settings.Secure.ACCESSIBILITY_BUTTON_MODE, value);
+            updateState(listPreference);
+        }
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        final ListPreference listPreference = (ListPreference) preference;
+
+        listPreference.setValue(getCurrentAccessibilityButtonMode());
+    }
+
+    private String getCurrentAccessibilityButtonMode() {
+        final int mode = Settings.Secure.getInt(mContext.getContentResolver(),
+                Settings.Secure.ACCESSIBILITY_BUTTON_MODE, mDefaultLocation);
+        return String.valueOf(mode);
+    }
+
+    private void initValueTitleMap() {
+        if (mValueTitleMap.size() == 0) {
+            final String[] values = mContext.getResources().getStringArray(
+                    R.array.accessibility_button_location_selector_values);
+            final String[] titles = mContext.getResources().getStringArray(
+                    R.array.accessibility_button_location_selector_titles);
+            final int mapSize = values.length;
+
+            mDefaultLocation = Integer.parseInt(values[0]);
+            for (int i = 0; i < mapSize; i++) {
+                mValueTitleMap.put(values[i], titles[i]);
+            }
+        }
+    }
+}

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

@@ -0,0 +1,106 @@
+/*
+ * 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 android.view.WindowManagerPolicyConstants.NAV_BAR_MODE_2BUTTON;
+import static android.view.WindowManagerPolicyConstants.NAV_BAR_MODE_GESTURAL;
+
+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.when;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.res.Resources;
+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.Spy;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+import org.robolectric.RobolectricTestRunner;
+
+/** Tests for {@link AccessibilityButtonLocationPreferenceController}. */
+@RunWith(RobolectricTestRunner.class)
+public class AccessibilityButtonLocationPreferenceControllerTest {
+
+    @Rule
+    public final MockitoRule mockito = MockitoJUnit.rule();
+
+    @Spy
+    private final Context mContext = ApplicationProvider.getApplicationContext();
+    @Spy
+    private final Resources mResources = mContext.getResources();
+    private final ContentResolver mContentResolver = mContext.getContentResolver();
+    private final ListPreference mListPreference = new ListPreference(mContext);
+    private AccessibilityButtonLocationPreferenceController mController;
+
+
+    @Before
+    public void setUp() {
+        mController = new AccessibilityButtonLocationPreferenceController(mContext,
+                "test_key");
+        when(mContext.getResources()).thenReturn(mResources);
+    }
+
+    @Test
+    public void getAvailabilityStatus_navigationGestureEnabled_returnDisabledDependentSetting() {
+        when(mResources.getInteger(com.android.internal.R.integer.config_navBarInteractionMode))
+                .thenReturn(NAV_BAR_MODE_GESTURAL);
+
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(DISABLED_DEPENDENT_SETTING);
+    }
+
+    @Test
+    public void getAvailabilityStatus_navigationGestureDisabled_returnAvailable() {
+        when(mResources.getInteger(com.android.internal.R.integer.config_navBarInteractionMode))
+                .thenReturn(NAV_BAR_MODE_2BUTTON);
+
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(AVAILABLE);
+    }
+
+    @Test
+    public void updateState_a11yBtnModeNavigationBar_navigationBarValue() {
+        Settings.Secure.putInt(mContentResolver, Settings.Secure.ACCESSIBILITY_BUTTON_MODE,
+                ACCESSIBILITY_BUTTON_MODE_NAVIGATION_BAR);
+
+        mController.updateState(mListPreference);
+
+        final String navigationBarValue = String.valueOf(ACCESSIBILITY_BUTTON_MODE_NAVIGATION_BAR);
+        assertThat(mListPreference.getValue()).isEqualTo(navigationBarValue);
+    }
+
+    @Test
+    public void onPreferenceChange_a11yBtnModeFloatingMenu_floatingMenuValue() {
+        final String floatingMenuValue = String.valueOf(ACCESSIBILITY_BUTTON_MODE_FLOATING_MENU);
+
+        mController.onPreferenceChange(mListPreference, floatingMenuValue);
+
+        assertThat(mListPreference.getValue()).isEqualTo(floatingMenuValue);
+    }
+}