/*
* Copyright (C) 2015 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.policy;
import android.app.StatusBarManager;
import android.os.IBinder;
import android.os.RemoteException;
import android.os.SystemClock;
import android.util.Slog;
import android.view.View;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.Interpolator;
import android.view.animation.TranslateAnimation;
import com.android.internal.statusbar.IStatusBarService;
import static android.view.WindowManagerInternal.*;
/**
* Implements status bar specific behavior.
*/
public class StatusBarController extends BarController {
private static final long TRANSITION_DURATION = 120L;
private final AppTransitionListener mAppTransitionListener
= new AppTransitionListener() {
@Override
public void onAppTransitionPendingLocked() {
mHandler.post(new Runnable() {
@Override
public void run() {
try {
IStatusBarService statusbar = getStatusBarService();
if (statusbar != null) {
statusbar.appTransitionPending();
}
} catch (RemoteException e) {
Slog.e(mTag, "RemoteException when app transition is pending", e);
// re-acquire status bar service next time it is needed.
mStatusBarService = null;
}
}
});
}
@Override
public void onAppTransitionStartingLocked(IBinder openToken, IBinder closeToken,
final Animation openAnimation, final Animation closeAnimation) {
mHandler.post(new Runnable() {
@Override
public void run() {
try {
IStatusBarService statusbar = getStatusBarService();
if (statusbar != null) {
long startTime = calculateStatusBarTransitionStartTime(openAnimation,
closeAnimation);
statusbar.appTransitionStarting(startTime, TRANSITION_DURATION);
}
} catch (RemoteException e) {
Slog.e(mTag, "RemoteException when app transition is starting", e);
// re-acquire status bar service next time it is needed.
mStatusBarService = null;
}
}
});
}
@Override
public void onAppTransitionCancelledLocked() {
mHandler.post(new Runnable() {
@Override
public void run() {
try {
IStatusBarService statusbar = getStatusBarService();
if (statusbar != null) {
statusbar.appTransitionCancelled();
}
} catch (RemoteException e) {
Slog.e(mTag, "RemoteException when app transition is cancelled", e);
// re-acquire status bar service next time it is needed.
mStatusBarService = null;
}
}
});
}
};
public StatusBarController() {
super("StatusBar",
View.STATUS_BAR_TRANSIENT,
View.STATUS_BAR_UNHIDE,
View.STATUS_BAR_TRANSLUCENT,
StatusBarManager.WINDOW_STATUS_BAR,
WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
}
public AppTransitionListener getAppTransitionListener() {
return mAppTransitionListener;
}
/**
* For a given app transition with {@code openAnimation} and {@code closeAnimation}, this
* calculates the timings for the corresponding status bar transition.
*
* @return the desired start time of the status bar transition, in uptime millis
*/
private long calculateStatusBarTransitionStartTime(Animation openAnimation,
Animation closeAnimation) {
if (openAnimation != null && closeAnimation != null) {
TranslateAnimation openTranslateAnimation = findTranslateAnimation(openAnimation);
TranslateAnimation closeTranslateAnimation = findTranslateAnimation(closeAnimation);
if (openTranslateAnimation != null) {
// Some interpolators are extremely quickly mostly finished, but not completely. For
// our purposes, we need to find the fraction for which ther interpolator is mostly
// there, and use that value for the calculation.
float t = findAlmostThereFraction(openTranslateAnimation.getInterpolator());
return SystemClock.uptimeMillis()
+ openTranslateAnimation.getStartOffset()
+ (long)(openTranslateAnimation.getDuration()*t) - TRANSITION_DURATION;
} else if (closeTranslateAnimation != null) {
return SystemClock.uptimeMillis();
} else {
return SystemClock.uptimeMillis();
}
} else {
return SystemClock.uptimeMillis();
}
}
/**
* Tries to find a {@link TranslateAnimation} inside the {@code animation}.
*
* @return the found animation, {@code null} otherwise
*/
private TranslateAnimation findTranslateAnimation(Animation animation) {
if (animation instanceof TranslateAnimation) {
return (TranslateAnimation) animation;
} else if (animation instanceof AnimationSet) {
AnimationSet set = (AnimationSet) animation;
for (int i = 0; i < set.getAnimations().size(); i++) {
Animation a = set.getAnimations().get(i);
if (a instanceof TranslateAnimation) {
return (TranslateAnimation) a;
}
}
}
return null;
}
/**
* Binary searches for a {@code t} such that there exists a {@code -0.01 < eps < 0.01} for which
* {@code interpolator(t + eps) > 0.99}.
*/
private float findAlmostThereFraction(Interpolator interpolator) {
float val = 0.5f;
float adj = 0.25f;
while (adj >= 0.01f) {
if (interpolator.getInterpolation(val) < 0.99f) {
val += adj;
} else {
val -= adj;
}
adj /= 2;
}
return val;
}
}