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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.development;
     18 
     19 import android.content.Context;
     20 import android.os.SystemProperties;
     21 import android.support.v14.preference.SwitchPreference;
     22 import android.support.v7.preference.Preference;
     23 import android.text.TextUtils;
     24 
     25 import com.android.internal.annotations.VisibleForTesting;
     26 import com.android.settings.R;
     27 import com.android.settings.core.PreferenceControllerMixin;
     28 import com.android.settingslib.development.DeveloperOptionsPreferenceController;
     29 
     30 public class CameraLaserSensorPreferenceController extends DeveloperOptionsPreferenceController
     31         implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin {
     32 
     33     private static final String KEY_CAMERA_LASER_SENSOR_SWITCH = "camera_laser_sensor_switch";
     34     @VisibleForTesting
     35     static final String BUILD_TYPE = "ro.build.type";
     36     @VisibleForTesting
     37     static final String PROPERTY_CAMERA_LASER_SENSOR = "persist.camera.stats.disablehaf";
     38     @VisibleForTesting
     39     static final int ENABLED = 0;
     40     @VisibleForTesting
     41     static final int DISABLED = 2;
     42     @VisibleForTesting
     43     static final String USERDEBUG_BUILD = "userdebug";
     44     @VisibleForTesting
     45     static final String ENG_BUILD = "eng";
     46     @VisibleForTesting
     47     static final String USER_BUILD = "user";
     48 
     49     public CameraLaserSensorPreferenceController(Context context) {
     50         super(context);
     51     }
     52 
     53     @Override
     54     public boolean isAvailable() {
     55         return mContext.getResources().getBoolean(R.bool.config_show_camera_laser_sensor);
     56     }
     57 
     58     @Override
     59     public String getPreferenceKey() {
     60         return KEY_CAMERA_LASER_SENSOR_SWITCH;
     61     }
     62 
     63     @Override
     64     public boolean onPreferenceChange(Preference preference, Object newValue) {
     65         final boolean isEnabled = (Boolean) newValue;
     66         String value = Integer.toString(isEnabled ? ENABLED : DISABLED);
     67         SystemProperties.set(PROPERTY_CAMERA_LASER_SENSOR, value);
     68         return true;
     69     }
     70 
     71     @Override
     72     public void updateState(Preference preference) {
     73         final boolean enabled = isLaserSensorEnabled();
     74         ((SwitchPreference) mPreference).setChecked(enabled);
     75     }
     76 
     77     @Override
     78     protected void onDeveloperOptionsSwitchDisabled() {
     79         super.onDeveloperOptionsSwitchDisabled();
     80         SystemProperties.set(PROPERTY_CAMERA_LASER_SENSOR, Integer.toString(DISABLED));
     81         ((SwitchPreference) mPreference).setChecked(false);
     82     }
     83 
     84     private boolean isLaserSensorEnabled() {
     85         final String prop = SystemProperties.get(PROPERTY_CAMERA_LASER_SENSOR,
     86                 Integer.toString(ENABLED));
     87         return TextUtils.equals(Integer.toString(ENABLED), prop);
     88     }
     89 
     90 }
     91