/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the
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* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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package com.android.settings.display;
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import static com.android.settingslib.display.BrightnessUtils.GAMMA_SPACE_MAX;
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import static com.android.settingslib.display.BrightnessUtils.convertLinearToGamma;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.database.ContentObserver;
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import android.net.Uri;
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import android.os.Handler;
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import android.os.Looper;
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import android.os.PowerManager;
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import android.os.RemoteException;
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import android.os.ServiceManager;
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import android.provider.Settings;
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import android.provider.Settings.System;
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import android.service.vr.IVrManager;
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import android.util.Log;
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import androidx.annotation.VisibleForTesting;
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import androidx.preference.Preference;
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import androidx.preference.PreferenceScreen;
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import com.android.settings.core.PreferenceControllerMixin;
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import com.android.settingslib.core.AbstractPreferenceController;
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import com.android.settingslib.core.lifecycle.Lifecycle;
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import com.android.settingslib.core.lifecycle.LifecycleObserver;
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import com.android.settingslib.core.lifecycle.events.OnStart;
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import com.android.settingslib.core.lifecycle.events.OnStop;
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import java.text.NumberFormat;
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public class BrightnessLevelPreferenceController extends AbstractPreferenceController implements
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PreferenceControllerMixin, LifecycleObserver, OnStart, OnStop {
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private static final String TAG = "BrightnessPrefCtrl";
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private static final String KEY_BRIGHTNESS = "brightness";
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private static final Uri BRIGHTNESS_URI;
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private static final Uri BRIGHTNESS_FOR_VR_URI;
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private static final Uri BRIGHTNESS_ADJ_URI;
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private final int mMinBrightness;
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private final int mMaxBrightness;
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private final int mMinVrBrightness;
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private final int mMaxVrBrightness;
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private final ContentResolver mContentResolver;
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private Preference mPreference;
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static {
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BRIGHTNESS_URI = System.getUriFor(System.SCREEN_BRIGHTNESS);
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BRIGHTNESS_FOR_VR_URI = System.getUriFor(System.SCREEN_BRIGHTNESS_FOR_VR);
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BRIGHTNESS_ADJ_URI = System.getUriFor(System.SCREEN_AUTO_BRIGHTNESS_ADJ);
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}
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private ContentObserver mBrightnessObserver =
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new ContentObserver(new Handler(Looper.getMainLooper())) {
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@Override
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public void onChange(boolean selfChange) {
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updatedSummary(mPreference);
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}
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};
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public BrightnessLevelPreferenceController(Context context, Lifecycle lifecycle) {
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super(context);
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if (lifecycle != null) {
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lifecycle.addObserver(this);
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}
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PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
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mMinBrightness = powerManager.getMinimumScreenBrightnessSetting();
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mMaxBrightness = powerManager.getMaximumScreenBrightnessSetting();
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mMinVrBrightness = powerManager.getMinimumScreenBrightnessForVrSetting();
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mMaxVrBrightness = powerManager.getMaximumScreenBrightnessForVrSetting();
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mContentResolver = mContext.getContentResolver();
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}
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@Override
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public boolean isAvailable() {
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return true;
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}
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@Override
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public String getPreferenceKey() {
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return KEY_BRIGHTNESS;
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}
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@Override
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public void displayPreference(PreferenceScreen screen) {
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super.displayPreference(screen);
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mPreference = screen.findPreference(KEY_BRIGHTNESS);
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}
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@Override
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public void updateState(Preference preference) {
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updatedSummary(preference);
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}
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@Override
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public void onStart() {
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mContentResolver.registerContentObserver(BRIGHTNESS_URI, false, mBrightnessObserver);
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mContentResolver.registerContentObserver(BRIGHTNESS_FOR_VR_URI, false, mBrightnessObserver);
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mContentResolver.registerContentObserver(BRIGHTNESS_ADJ_URI, false, mBrightnessObserver);
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}
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@Override
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public void onStop() {
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mContentResolver.unregisterContentObserver(mBrightnessObserver);
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}
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private void updatedSummary(Preference preference) {
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if (preference != null) {
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preference.setSummary(NumberFormat.getPercentInstance().format(getCurrentBrightness()));
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}
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}
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private double getCurrentBrightness() {
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final int value;
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if (isInVrMode()) {
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value = convertLinearToGamma(System.getInt(mContentResolver,
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System.SCREEN_BRIGHTNESS_FOR_VR, mMaxBrightness),
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mMinVrBrightness, mMaxVrBrightness);
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} else {
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value = convertLinearToGamma(Settings.System.getInt(mContentResolver,
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System.SCREEN_BRIGHTNESS, mMinBrightness),
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mMinBrightness, mMaxBrightness);
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}
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return getPercentage(value, 0, GAMMA_SPACE_MAX);
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}
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private double getPercentage(double value, int min, int max) {
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if (value > max) {
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return 1.0;
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}
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if (value < min) {
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return 0.0;
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}
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return (value - min) / (max - min);
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}
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@VisibleForTesting
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IVrManager safeGetVrManager() {
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return IVrManager.Stub.asInterface(ServiceManager.getService(
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Context.VR_SERVICE));
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}
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@VisibleForTesting
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boolean isInVrMode() {
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IVrManager vrManager = safeGetVrManager();
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if (vrManager != null) {
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try {
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return vrManager.getVrModeState();
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} catch (RemoteException e) {
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Log.e(TAG, "Failed to check vr mode!", e);
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}
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}
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return false;
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}
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}
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