Introduce CameraLaserSensorPreferenceControllerV2

- Create new CameraLaserSensorPreferenceControllerV2
 - Copy logic from CameraLaserSensorPreferenceController with slight
 modifications for dashboard fragment compatibility
 - Deprecate CameraLaserSensorPreferenceController

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: I8854d3e891afab607025a427a376e33e9b61dcc3

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

@@ -28,6 +28,10 @@ import com.android.settings.R;
 import com.android.settings.core.PreferenceControllerMixin;
 import com.android.settingslib.core.AbstractPreferenceController;
 
+/**
+ * deprecated in favor of {@link CameraLaserSensorPreferenceControllerV2}
+ */
+@Deprecated
 public class CameraLaserSensorPreferenceController extends AbstractPreferenceController
         implements PreferenceControllerMixin {
 

src/com/android/settings/development/CameraLaserSensorPreferenceControllerV2.java

@@ -0,0 +1,108 @@
+/*
+ * 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.v14.preference.SwitchPreference;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+import android.text.TextUtils;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.settings.R;
+
+public class CameraLaserSensorPreferenceControllerV2 extends
+        DeveloperOptionsPreferenceController implements
+        Preference.OnPreferenceChangeListener {
+
+    private static final String KEY_CAMERA_LASER_SENSOR_SWITCH = "camera_laser_sensor_switch";
+    @VisibleForTesting
+    static final String BUILD_TYPE = "ro.build.type";
+    @VisibleForTesting
+    static final String PROPERTY_CAMERA_LASER_SENSOR = "persist.camera.stats.disablehaf";
+    @VisibleForTesting
+    static final int ENABLED = 0;
+    @VisibleForTesting
+    static final int DISABLED = 2;
+    @VisibleForTesting
+    static final String USERDEBUG_BUILD = "userdebug";
+    @VisibleForTesting
+    static final String ENG_BUILD = "eng";
+    @VisibleForTesting
+    static final String USER_BUILD = "user";
+
+    private SwitchPreference mPreference;
+
+    public CameraLaserSensorPreferenceControllerV2(Context context) {
+        super(context);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        final String buildType = SystemProperties.get(BUILD_TYPE);
+        return mContext.getResources().getBoolean(R.bool.config_show_camera_laser_sensor) &&
+                (TextUtils.equals(USERDEBUG_BUILD, buildType) || TextUtils.equals(ENG_BUILD,
+                        buildType));
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_CAMERA_LASER_SENSOR_SWITCH;
+    }
+
+    @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;
+        String value = Integer.toString(isEnabled ? ENABLED : DISABLED);
+        SystemProperties.set(PROPERTY_CAMERA_LASER_SENSOR, value);
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        final boolean enabled = isLaserSensorEnabled();
+        mPreference.setChecked(enabled);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchEnabled() {
+        mPreference.setEnabled(true);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        SystemProperties.set(PROPERTY_CAMERA_LASER_SENSOR, Integer.toString(DISABLED));
+        mPreference.setChecked(false);
+        mPreference.setEnabled(false);
+    }
+
+    private boolean isLaserSensorEnabled() {
+        final String prop = SystemProperties.get(PROPERTY_CAMERA_LASER_SENSOR,
+                Integer.toString(ENABLED));
+        return TextUtils.equals(Integer.toString(ENABLED), prop);
+    }
+
+}

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

@@ -199,7 +199,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         // logger buffer sizes
         // store logger data persistently on device
         // telephony monitor
-        // camera laser sensor
+        controllers.add(new CameraLaserSensorPreferenceControllerV2(context));
         // camera HAL HDR+
         // feature flags
         // wireless display certification