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/*
* Copyright (C) 2012 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.server.power;
import android.os.PowerManager;
/**
* Describes the requested power state of the display.
*
* This object is intended to describe the general characteristics of the
* power state, such as whether the screen should be on or off and the current
* brightness controls leaving the {@link DisplayPowerController} to manage the
* details of how the transitions between states should occur. The goal is for
* the {@link PowerManagerService} to focus on the global power state and not
* have to micro-manage screen off animations, auto-brightness and other effects.
*/
final class DisplayPowerRequest {
public static final int SCREEN_STATE_OFF = 0;
public static final int SCREEN_STATE_DIM = 1;
public static final int SCREEN_STATE_BRIGHT = 2;
// The requested minimum screen power state: off, dim or bright.
public int screenState;
// If true, the proximity sensor overrides the screen state when an object is
// nearby, turning it off temporarily until the object is moved away.
public boolean useProximitySensor;
// The desired screen brightness in the range 0 (minimum / off) to 255 (brightest).
// The display power controller may choose to clamp the brightness.
// When auto-brightness is enabled, this field should specify a nominal default
// value to use while waiting for the light sensor to report enough data.
public int screenBrightness;
// The screen auto-brightness adjustment factor in the range -1 (dimmer) to 1 (brighter).
public float screenAutoBrightnessAdjustment;
// If true, enables automatic brightness control.
public boolean useAutoBrightness;
// If true, prevents the screen from completely turning on if it is currently off.
// The display does not enter a "ready" state if this flag is true and screen on is
// blocked. The window manager policy blocks screen on while it prepares the keyguard to
// prevent the user from seeing intermediate updates.
//
// Technically, we may not block the screen itself from turning on (because that introduces
// extra unnecessary latency) but we do prevent content on screen from becoming
// visible to the user.
public boolean blockScreenOn;
public DisplayPowerRequest() {
screenState = SCREEN_STATE_BRIGHT;
useProximitySensor = false;
screenBrightness = PowerManager.BRIGHTNESS_ON;
screenAutoBrightnessAdjustment = 0.0f;
useAutoBrightness = false;
blockScreenOn = false;
}
public DisplayPowerRequest(DisplayPowerRequest other) {
copyFrom(other);
}
public void copyFrom(DisplayPowerRequest other) {
screenState = other.screenState;
useProximitySensor = other.useProximitySensor;
screenBrightness = other.screenBrightness;
screenAutoBrightnessAdjustment = other.screenAutoBrightnessAdjustment;
useAutoBrightness = other.useAutoBrightness;
blockScreenOn = other.blockScreenOn;
}
@Override
public boolean equals(Object o) {
return o instanceof DisplayPowerRequest
&& equals((DisplayPowerRequest)o);
}
public boolean equals(DisplayPowerRequest other) {
return other != null
&& screenState == other.screenState
&& useProximitySensor == other.useProximitySensor
&& screenBrightness == other.screenBrightness
&& screenAutoBrightnessAdjustment == other.screenAutoBrightnessAdjustment
&& useAutoBrightness == other.useAutoBrightness
&& blockScreenOn == other.blockScreenOn;
}
@Override
public int hashCode() {
return 0; // don't care
}
@Override
public String toString() {
return "screenState=" + screenState
+ ", useProximitySensor=" + useProximitySensor
+ ", screenBrightness=" + screenBrightness
+ ", screenAutoBrightnessAdjustment=" + screenAutoBrightnessAdjustment
+ ", useAutoBrightness=" + useAutoBrightness
+ ", blockScreenOn=" + blockScreenOn;
}
}
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