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/*
* 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.display;
import static android.content.Intent.ACTION_SHOW_BRIGHTNESS_DIALOG;
import static com.android.settingslib.display.BrightnessUtils.GAMMA_SPACE_MAX;
import static com.android.settingslib.display.BrightnessUtils.GAMMA_SPACE_MIN;
import static com.android.settingslib.display.BrightnessUtils.convertLinearToGammaFloat;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.database.ContentObserver;
import android.hardware.display.BrightnessInfo;
import android.hardware.display.DisplayManager;
import android.hardware.display.DisplayManager.DisplayListener;
import android.net.Uri;
import android.os.Handler;
import android.os.Looper;
import android.os.PowerManager;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.provider.Settings.System;
import android.service.vr.IVrManager;
import android.text.TextUtils;
import android.util.Log;
import androidx.annotation.VisibleForTesting;
import androidx.preference.Preference;
import androidx.preference.PreferenceScreen;
import com.android.settings.core.PreferenceControllerMixin;
import com.android.settings.core.SettingsBaseActivity;
import com.android.settingslib.core.AbstractPreferenceController;
import com.android.settingslib.core.lifecycle.Lifecycle;
import com.android.settingslib.core.lifecycle.LifecycleObserver;
import com.android.settingslib.core.lifecycle.events.OnStart;
import com.android.settingslib.core.lifecycle.events.OnStop;
import com.android.settingslib.transition.SettingsTransitionHelper;
import java.text.NumberFormat;
public class BrightnessLevelPreferenceController extends AbstractPreferenceController implements
PreferenceControllerMixin, LifecycleObserver, OnStart, OnStop {
private static final String TAG = "BrightnessPrefCtrl";
private static final String KEY_BRIGHTNESS = "brightness";
private static final Uri BRIGHTNESS_FOR_VR_URI;
private static final Uri BRIGHTNESS_ADJ_URI;
private final float mMinVrBrightness;
private final float mMaxVrBrightness;
private final ContentResolver mContentResolver;
private final Handler mHandler = new Handler(Looper.getMainLooper());
private final DisplayManager mDisplayManager;
private Preference mPreference;
static {
BRIGHTNESS_FOR_VR_URI = System.getUriFor(System.SCREEN_BRIGHTNESS_FOR_VR);
BRIGHTNESS_ADJ_URI = System.getUriFor(System.SCREEN_AUTO_BRIGHTNESS_ADJ);
}
private ContentObserver mBrightnessObserver =
new ContentObserver(mHandler) {
@Override
public void onChange(boolean selfChange) {
updatedSummary(mPreference);
}
};
private final DisplayListener mDisplayListener = new DisplayListener() {
@Override
public void onDisplayAdded(int displayId) {
}
@Override
public void onDisplayRemoved(int displayId) {
}
@Override
public void onDisplayChanged(int displayId) {
updatedSummary(mPreference);
}
};
public BrightnessLevelPreferenceController(Context context, Lifecycle lifecycle) {
super(context);
mDisplayManager = context.getSystemService(DisplayManager.class);
if (lifecycle != null) {
lifecycle.addObserver(this);
}
final PowerManager powerManager = context.getSystemService(PowerManager.class);
mMinVrBrightness = powerManager.getBrightnessConstraint(
PowerManager.BRIGHTNESS_CONSTRAINT_TYPE_MINIMUM_VR);
mMaxVrBrightness = powerManager.getBrightnessConstraint(
PowerManager.BRIGHTNESS_CONSTRAINT_TYPE_MAXIMUM_VR);
mContentResolver = mContext.getContentResolver();
}
@Override
public boolean isAvailable() {
return true;
}
@Override
public String getPreferenceKey() {
return KEY_BRIGHTNESS;
}
@Override
public void displayPreference(PreferenceScreen screen) {
super.displayPreference(screen);
mPreference = screen.findPreference(KEY_BRIGHTNESS);
}
@Override
public void updateState(Preference preference) {
updatedSummary(preference);
}
@Override
public void onStart() {
mContentResolver.registerContentObserver(BRIGHTNESS_FOR_VR_URI, false, mBrightnessObserver);
mContentResolver.registerContentObserver(BRIGHTNESS_ADJ_URI, false, mBrightnessObserver);
mDisplayManager.registerDisplayListener(mDisplayListener, mHandler,
DisplayManager.EVENT_FLAG_DISPLAY_BRIGHTNESS);
}
@Override
public void onStop() {
mContentResolver.unregisterContentObserver(mBrightnessObserver);
mDisplayManager.unregisterDisplayListener(mDisplayListener);
}
@Override
public boolean handlePreferenceTreeClick(Preference preference) {
if (!TextUtils.equals(preference.getKey(), getPreferenceKey())) {
return false;
}
final Intent intent = new Intent(ACTION_SHOW_BRIGHTNESS_DIALOG);
intent.putExtra(SettingsBaseActivity.EXTRA_PAGE_TRANSITION_TYPE,
SettingsTransitionHelper.TransitionType.TRANSITION_NONE);
mContext.startActivity(intent);
return true;
}
private void updatedSummary(Preference preference) {
if (preference != null) {
preference.setSummary(NumberFormat.getPercentInstance().format(getCurrentBrightness()));
}
}
private double getCurrentBrightness() {
int value = 0;
if (isInVrMode()) {
value = convertLinearToGammaFloat(System.getFloat(mContentResolver,
System.SCREEN_BRIGHTNESS_FOR_VR_FLOAT, mMaxVrBrightness),
mMinVrBrightness, mMaxVrBrightness);
} else {
final BrightnessInfo info = mContext.getDisplay().getBrightnessInfo();
if (info != null) {
value = convertLinearToGammaFloat(info.brightness, info.brightnessMinimum,
info.brightnessMaximum);
}
}
return getPercentage(value, GAMMA_SPACE_MIN, GAMMA_SPACE_MAX);
}
private double getPercentage(double value, int min, int max) {
if (value > max) {
return 1.0;
}
if (value < min) {
return 0.0;
}
return (value - min) / (max - min);
}
@VisibleForTesting
IVrManager safeGetVrManager() {
return IVrManager.Stub.asInterface(ServiceManager.getService(
Context.VR_SERVICE));
}
@VisibleForTesting
boolean isInVrMode() {
IVrManager vrManager = safeGetVrManager();
if (vrManager != null) {
try {
return vrManager.getVrModeState();
} catch (RemoteException e) {
Log.e(TAG, "Failed to check vr mode!", e);
}
}
return false;
}
}
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