ScrimState.java
/*
* 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.systemui.statusbar.phone; import android.graphics.Color;
import android.os.Trace;
import android.util.MathUtils; import com.android.keyguard.KeyguardUpdateMonitor;
import com.android.systemui.statusbar.ScrimView;
import com.android.systemui.statusbar.stack.StackStateAnimator; /**
* Possible states of the ScrimController state machine.
*/
public enum ScrimState { /**
* Initial state.
*/
UNINITIALIZED(-1), /**
* On the lock screen.
*/
KEYGUARD(0) { @Override
public void prepare(ScrimState previousState) {
mBlankScreen = false;
if (previousState == ScrimState.AOD) {
mAnimationDuration = StackStateAnimator.ANIMATION_DURATION_WAKEUP;
if (mDisplayRequiresBlanking) {
// DisplayPowerManager will blank the screen, we'll just
// set our scrim to black in this frame to avoid flickering and
// fade it out afterwards.
mBlankScreen = true;
}
} else {
mAnimationDuration = ScrimController.ANIMATION_DURATION;
}
mCurrentBehindAlpha = mScrimBehindAlphaKeyguard;
mCurrentInFrontAlpha = 0;
} @Override
public float getBehindAlpha(float busynessFactor) {
return MathUtils.map(0 /* start */, 1 /* stop */,
mScrimBehindAlphaKeyguard, ScrimController.GRADIENT_SCRIM_ALPHA_BUSY,
busynessFactor);
}
}, /**
* Showing password challenge on the keyguard.
*/
BOUNCER(1) {
@Override
public void prepare(ScrimState previousState) {
mCurrentBehindAlpha = ScrimController.GRADIENT_SCRIM_ALPHA_BUSY;
mCurrentInFrontAlpha = 0f;
}
}, /**
* Showing password challenge on top of a FLAG_SHOW_WHEN_LOCKED activity.
*/
BOUNCER_SCRIMMED(2) {
@Override
public void prepare(ScrimState previousState) {
mCurrentBehindAlpha = 0;
mCurrentInFrontAlpha = ScrimController.GRADIENT_SCRIM_ALPHA_BUSY;
}
}, /**
* Changing screen brightness from quick settings.
*/
BRIGHTNESS_MIRROR(3) {
@Override
public void prepare(ScrimState previousState) {
mCurrentBehindAlpha = 0;
mCurrentInFrontAlpha = 0;
}
}, /**
* Always on display or screen off.
*/
AOD(4) {
@Override
public void prepare(ScrimState previousState) {
final boolean alwaysOnEnabled = mDozeParameters.getAlwaysOn();
mBlankScreen = mDisplayRequiresBlanking;
mCurrentBehindAlpha = mWallpaperSupportsAmbientMode
&& !mKeyguardUpdateMonitor.hasLockscreenWallpaper() ? 0f : 1f;
mCurrentInFrontAlpha = alwaysOnEnabled ? mAodFrontScrimAlpha : 1f;
mCurrentInFrontTint = Color.BLACK;
mCurrentBehindTint = Color.BLACK;
mAnimationDuration = ScrimController.ANIMATION_DURATION_LONG;
// DisplayPowerManager may blank the screen for us,
// in this case we just need to set our state.
mAnimateChange = mDozeParameters.shouldControlScreenOff();
} @Override
public boolean isLowPowerState() {
return true;
}
}, /**
* When phone wakes up because you received a notification.
*/
PULSING(5) {
@Override
public void prepare(ScrimState previousState) {
mCurrentInFrontAlpha = 0;
mCurrentInFrontTint = Color.BLACK;
mCurrentBehindAlpha = mWallpaperSupportsAmbientMode
&& !mKeyguardUpdateMonitor.hasLockscreenWallpaper() ? 0f : 1f;
mCurrentBehindTint = Color.BLACK;
mBlankScreen = mDisplayRequiresBlanking;
}
}, /**
* Unlocked on top of an app (launcher or any other activity.)
*/
UNLOCKED(6) {
@Override
public void prepare(ScrimState previousState) {
mCurrentBehindAlpha = 0;
mCurrentInFrontAlpha = 0;
mAnimationDuration = StatusBar.FADE_KEYGUARD_DURATION; if (previousState == ScrimState.AOD || previousState == ScrimState.PULSING) {
// Fade from black to transparent when coming directly from AOD
updateScrimColor(mScrimInFront, 1, Color.BLACK);
updateScrimColor(mScrimBehind, 1, Color.BLACK);
// Scrims should still be black at the end of the transition.
mCurrentInFrontTint = Color.BLACK;
mCurrentBehindTint = Color.BLACK;
mBlankScreen = true;
} else {
mCurrentInFrontTint = Color.TRANSPARENT;
mCurrentBehindTint = Color.TRANSPARENT;
mBlankScreen = false;
}
}
}; boolean mBlankScreen = false;
long mAnimationDuration = ScrimController.ANIMATION_DURATION;
int mCurrentInFrontTint = Color.TRANSPARENT;
int mCurrentBehindTint = Color.TRANSPARENT;
boolean mAnimateChange = true;
float mCurrentInFrontAlpha;
float mCurrentBehindAlpha;
float mAodFrontScrimAlpha;
float mScrimBehindAlphaKeyguard;
ScrimView mScrimInFront;
ScrimView mScrimBehind;
DozeParameters mDozeParameters;
boolean mDisplayRequiresBlanking;
boolean mWallpaperSupportsAmbientMode;
KeyguardUpdateMonitor mKeyguardUpdateMonitor;
int mIndex; ScrimState(int index) {
mIndex = index;
} public void init(ScrimView scrimInFront, ScrimView scrimBehind, DozeParameters dozeParameters) {
mScrimInFront = scrimInFront;
mScrimBehind = scrimBehind;
mDozeParameters = dozeParameters;
mDisplayRequiresBlanking = dozeParameters.getDisplayNeedsBlanking();
mKeyguardUpdateMonitor = KeyguardUpdateMonitor.getInstance(scrimInFront.getContext());
} public void prepare(ScrimState previousState) {
} public int getIndex() {
return mIndex;
} public float getFrontAlpha() {
return mCurrentInFrontAlpha;
} public float getBehindAlpha(float busyness) {
return mCurrentBehindAlpha;
} public int getFrontTint() {
return mCurrentInFrontTint;
} public int getBehindTint() {
return mCurrentBehindTint;
} public long getAnimationDuration() {
return mAnimationDuration;
} public boolean getBlanksScreen() {
return mBlankScreen;
} public void updateScrimColor(ScrimView scrim, float alpha, int tint) {
Trace.traceCounter(Trace.TRACE_TAG_APP,
scrim == mScrimInFront ? "front_scrim_alpha" : "back_scrim_alpha",
(int) (alpha * 255)); Trace.traceCounter(Trace.TRACE_TAG_APP,
scrim == mScrimInFront ? "front_scrim_tint" : "back_scrim_tint",
Color.alpha(tint)); scrim.setTint(tint);
scrim.setViewAlpha(alpha);
} public boolean getAnimateChange() {
return mAnimateChange;
} public void setAodFrontScrimAlpha(float aodFrontScrimAlpha) {
mAodFrontScrimAlpha = aodFrontScrimAlpha;
} public void setScrimBehindAlphaKeyguard(float scrimBehindAlphaKeyguard) {
mScrimBehindAlphaKeyguard = scrimBehindAlphaKeyguard;
} public void setWallpaperSupportsAmbientMode(boolean wallpaperSupportsAmbientMode) {
mWallpaperSupportsAmbientMode = wallpaperSupportsAmbientMode;
} public boolean isLowPowerState() {
return false;
}
}
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