Introduce ForceGpuRenderingPreferenceController

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

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: Ib3afb9278257f0c2b181e15f28650d9620538c17
diff --git a/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java b/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
index a4e5de1..a36712b 100644
--- a/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
+++ b/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
@@ -287,7 +287,7 @@
         // animator duration scale
         // simulate secondary displays
         // smallest width
-        // force gpu rendering
+        controllers.add(new ForceGpuRenderingPreferenceController(context));
         // show gpu view updates
         // show hardware layers updates
         // debug gpu overdraw
diff --git a/src/com/android/settings/development/ForceGpuRenderingPreferenceController.java b/src/com/android/settings/development/ForceGpuRenderingPreferenceController.java
new file mode 100644
index 0000000..9c56f65
--- /dev/null
+++ b/src/com/android/settings/development/ForceGpuRenderingPreferenceController.java
@@ -0,0 +1,81 @@
+/*
+ * 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.support.annotation.VisibleForTesting;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settingslib.development.SystemPropPoker;
+
+public class ForceGpuRenderingPreferenceController extends
+        DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener {
+
+    private static final String FORCE_HARDWARE_UI_KEY = "force_hw_ui";
+
+    @VisibleForTesting
+    static final String HARDWARE_UI_PROPERTY = "persist.sys.ui.hw";
+
+    private SwitchPreference mPreference;
+
+    public ForceGpuRenderingPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return FORCE_HARDWARE_UI_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;
+        SystemProperties.set(HARDWARE_UI_PROPERTY,
+                isEnabled ? Boolean.toString(true) : Boolean.toString(false));
+        SystemPropPoker.getInstance().poke();
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        final boolean isEnabled = SystemProperties.getBoolean(HARDWARE_UI_PROPERTY,
+                false /* default */);
+        mPreference.setChecked(isEnabled);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchEnabled() {
+        mPreference.setEnabled(true);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        SystemProperties.set(HARDWARE_UI_PROPERTY, Boolean.toString(false));
+        mPreference.setEnabled(false);
+        mPreference.setChecked(false);
+    }
+}
diff --git a/tests/robotests/src/com/android/settings/development/ForceGpuRenderingPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/development/ForceGpuRenderingPreferenceControllerTest.java
new file mode 100644
index 0000000..66060a8
--- /dev/null
+++ b/tests/robotests/src/com/android/settings/development/ForceGpuRenderingPreferenceControllerTest.java
@@ -0,0 +1,127 @@
+/*
+ * 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.android.settings.development.ForceGpuRenderingPreferenceController
+        .HARDWARE_UI_PROPERTY;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.testutils.shadow.SettingsShadowSystemProperties;
+
+import org.junit.After;
+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,
+        shadows = {SettingsShadowSystemProperties.class})
+public class ForceGpuRenderingPreferenceControllerTest {
+
+    @Mock
+    private SwitchPreference mPreference;
+    @Mock
+    private PreferenceScreen mPreferenceScreen;
+
+    private Context mContext;
+    private ForceGpuRenderingPreferenceController mController;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mController = new ForceGpuRenderingPreferenceController(mContext);
+        when(mPreferenceScreen.findPreference(mController.getPreferenceKey())).thenReturn(
+                mPreference);
+        mController.displayPreference(mPreferenceScreen);
+    }
+
+    @After
+    public void tearDown() {
+        SettingsShadowSystemProperties.clear();
+    }
+
+    @Test
+    public void onPreferenceChanged_settingEnabled_turnOnForceGpuRendering() {
+        mController.onPreferenceChange(mPreference, true /* new value */);
+
+        final boolean mode = SettingsShadowSystemProperties.getBoolean(HARDWARE_UI_PROPERTY,
+                false /* default */);
+
+        assertThat(mode).isTrue();
+    }
+
+    @Test
+    public void onPreferenceChanged_settingDisabled_turnOffForceGpuRendering() {
+        mController.onPreferenceChange(mPreference, false /* new value */);
+
+        final boolean mode = SettingsShadowSystemProperties.getBoolean(HARDWARE_UI_PROPERTY,
+                false /* default */);
+
+        assertThat(mode).isFalse();
+    }
+
+    @Test
+    public void updateState_settingEnabled_preferenceShouldBeChecked() {
+        SettingsShadowSystemProperties.set(HARDWARE_UI_PROPERTY, Boolean.toString(true));
+        mController.updateState(mPreference);
+
+        verify(mPreference).setChecked(true);
+    }
+
+    @Test
+    public void updateState_settingDisabled_preferenceShouldNotBeChecked() {
+        SettingsShadowSystemProperties.set(HARDWARE_UI_PROPERTY, Boolean.toString(false));
+        mController.updateState(mPreference);
+
+        verify(mPreference).setChecked(false);
+    }
+
+    @Test
+    public void onDeveloperOptionsDisabled_shouldDisablePreference() {
+        mController.onDeveloperOptionsDisabled();
+
+        final boolean mode = SettingsShadowSystemProperties.getBoolean(HARDWARE_UI_PROPERTY,
+                false /* default */);
+
+        assertThat(mode).isFalse();
+        verify(mPreference).setEnabled(false);
+        verify(mPreference).setChecked(false);
+    }
+
+    @Test
+    public void onDeveloperOptionsEnabled_shouldEnablePreference() {
+        mController.onDeveloperOptionsEnabled();
+
+        verify(mPreference).setEnabled(true);
+    }
+}