Introduce RtlLayoutPreferenceController

- Create new RtlLayoutPreferenceController
 - Create controller inside the DashboardFragment
 - Port logic from DevelopmentSettings into the controller

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: Ieefd8dc97b0e1f781d97aca781bba0243c3875b9

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

@@ -281,7 +281,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new PointerLocationPreferenceController(context));
         controllers.add(new ShowSurfaceUpdatesPreferenceController(context));
         // show layout bounds
-        // force rtl layout direction
+        controllers.add(new RtlLayoutPreferenceController(context));
         // window animation scale
         // transition animation scale
         // animator duration scale

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

@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2017 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.development;
+
+import android.content.Context;
+import android.os.SystemProperties;
+import android.provider.Settings;
+import android.support.annotation.VisibleForTesting;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.internal.app.LocalePicker;
+
+public class RtlLayoutPreferenceController extends DeveloperOptionsPreferenceController implements
+        Preference.OnPreferenceChangeListener {
+
+    private static final String FORCE_RTL_LAYOUT_KEY = "force_rtl_layout_all_locales";
+
+    @VisibleForTesting
+    static final int SETTING_VALUE_ON = 1;
+    @VisibleForTesting
+    static final int SETTING_VALUE_OFF = 0;
+
+    private SwitchPreference mPreference;
+
+    public RtlLayoutPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return FORCE_RTL_LAYOUT_KEY;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+
+        mPreference = (SwitchPreference) screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final boolean isEnabled = (Boolean) newValue;
+        writeToForceRtlLayoutSetting(isEnabled);
+        updateLocales();
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        int rtlLayoutMode = Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.DEVELOPMENT_FORCE_RTL, SETTING_VALUE_OFF);
+        mPreference.setChecked(rtlLayoutMode != SETTING_VALUE_OFF);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchEnabled() {
+        mPreference.setEnabled(true);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        writeToForceRtlLayoutSetting(false);
+        updateLocales();
+        mPreference.setChecked(false);
+        mPreference.setEnabled(false);
+    }
+
+    @VisibleForTesting
+    void updateLocales() {
+        LocalePicker.updateLocales(mContext.getResources().getConfiguration().getLocales());
+    }
+
+    private void writeToForceRtlLayoutSetting(boolean isEnabled) {
+        Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.DEVELOPMENT_FORCE_RTL,
+                isEnabled ? SETTING_VALUE_ON : SETTING_VALUE_OFF);
+        SystemProperties.set(Settings.Global.DEVELOPMENT_FORCE_RTL,
+                isEnabled ? Integer.toString(SETTING_VALUE_ON)
+                        : Integer.toString(SETTING_VALUE_OFF));
+    }
+}

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

@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2017 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.development;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.provider.Settings;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class RtlLayoutPreferenceControllerTest {
+
+    @Mock
+    private PreferenceScreen mScreen;
+    @Mock
+    private SwitchPreference mPreference;
+
+    private Context mContext;
+
+    private RtlLayoutPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mController = new RtlLayoutPreferenceController(mContext);
+        when(mScreen.findPreference(mController.getPreferenceKey())).thenReturn(mPreference);
+        mController.displayPreference(mScreen);
+    }
+
+    @Test
+    public void updateState_forceRtlEnabled_shouldCheckedPreference() {
+        Settings.Global.putInt(mContext.getContentResolver(), Settings.Global.DEVELOPMENT_FORCE_RTL,
+                RtlLayoutPreferenceController.SETTING_VALUE_ON);
+
+        mController.updateState(mPreference);
+
+        verify(mPreference).setChecked(true);
+    }
+
+    @Test
+    public void updateState_forceRtlDisabled_shouldUncheckedPreference() {
+        Settings.Global.putInt(mContext.getContentResolver(), Settings.Global.DEVELOPMENT_FORCE_RTL,
+                RtlLayoutPreferenceController.SETTING_VALUE_OFF);
+
+        mController.updateState(mPreference);
+
+        verify(mPreference).setChecked(false);
+    }
+
+    @Test
+    public void onPreferenceChange_preferenceChecked_shouldEnableForceRtl() {
+        mController = spy(mController);
+        doNothing().when(mController).updateLocales();
+        mController.onPreferenceChange(mPreference, true /* new value */);
+
+        final int rtlLayoutMode = Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.DEVELOPMENT_FORCE_RTL, -1 /* default */);
+
+        assertThat(rtlLayoutMode).isEqualTo(RtlLayoutPreferenceController.SETTING_VALUE_ON);
+    }
+
+    @Test
+    public void onPreferenceChange__preferenceUnchecked_shouldDisableForceRtl() {
+        mController = spy(mController);
+        doNothing().when(mController).updateLocales();
+        mController.onPreferenceChange(mPreference, false /* new value */);
+
+        final int rtlLayoutMode = Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.DEVELOPMENT_FORCE_RTL, -1 /* default */);
+
+        assertThat(rtlLayoutMode).isEqualTo(RtlLayoutPreferenceController.SETTING_VALUE_OFF);
+    }
+
+    @Test
+    public void onDeveloperOptionsSwitchEnabled_preferenceShouldBeEnabled() {
+        mController.onDeveloperOptionsSwitchEnabled();
+
+        verify(mPreference).setEnabled(true);
+    }
+
+    @Test
+    public void onDeveloperOptionsSwitchDisabled_preferenceShouldBeEnabled() {
+        mController = spy(mController);
+        doNothing().when(mController).updateLocales();
+        mController.onDeveloperOptionsSwitchDisabled();
+
+        final int rtlLayoutMode = Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.DEVELOPMENT_FORCE_RTL, -1 /* default */);
+
+        assertThat(rtlLayoutMode).isEqualTo(RtlLayoutPreferenceController.SETTING_VALUE_OFF);
+        verify(mPreference).setEnabled(false);
+        verify(mPreference).setChecked(false);
+    }
+}