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/*
* Copyright (C) 2018 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.quickstep;
import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.os.RemoteException;
import android.util.Log;
import com.android.launcher3.Utilities;
import com.android.launcher3.allapps.DiscoveryBounce;
import com.android.launcher3.util.MainThreadInitializedObject;
import com.android.launcher3.util.UiThreadHelper;
import com.android.systemui.shared.recents.ISystemUiProxy;
import androidx.annotation.WorkerThread;
/**
* Sets alpha for the back button
*/
public class OverviewInteractionState {
private static final String TAG = "OverviewFlags";
private static final String HAS_ENABLED_QUICKSTEP_ONCE = "launcher.has_enabled_quickstep_once";
// We do not need any synchronization for this variable as its only written on UI thread.
public static final MainThreadInitializedObject<OverviewInteractionState> INSTANCE =
new MainThreadInitializedObject<>(OverviewInteractionState::new);
private static final int MSG_SET_PROXY = 200;
private static final int MSG_SET_BACK_BUTTON_ALPHA = 201;
private final Context mContext;
private final Handler mUiHandler;
private final Handler mBgHandler;
// These are updated on the background thread
private ISystemUiProxy mISystemUiProxy;
private float mBackButtonAlpha = 1;
private int mSystemUiStateFlags;
private OverviewInteractionState(Context context) {
mContext = context;
// Data posted to the uihandler will be sent to the bghandler. Data is sent to uihandler
// because of its high send frequency and data may be very different than the previous value
// For example, send back alpha on uihandler to avoid flickering when setting its visibility
mUiHandler = new Handler(this::handleUiMessage);
mBgHandler = new Handler(UiThreadHelper.getBackgroundLooper(), this::handleBgMessage);
onNavigationModeChanged(SysUINavigationMode.INSTANCE.get(context)
.addModeChangeListener(this::onNavigationModeChanged));
}
public float getBackButtonAlpha() {
return mBackButtonAlpha;
}
public void setBackButtonAlpha(float alpha, boolean animate) {
if (!modeSupportsGestures()) {
alpha = 1;
}
mUiHandler.removeMessages(MSG_SET_BACK_BUTTON_ALPHA);
mUiHandler.obtainMessage(MSG_SET_BACK_BUTTON_ALPHA, animate ? 1 : 0, 0, alpha)
.sendToTarget();
}
public void setSystemUiProxy(ISystemUiProxy proxy) {
mBgHandler.obtainMessage(MSG_SET_PROXY, proxy).sendToTarget();
}
public void setSystemUiStateFlags(int stateFlags) {
mSystemUiStateFlags = stateFlags;
}
public int getSystemUiStateFlags() {
return mSystemUiStateFlags;
}
private boolean handleUiMessage(Message msg) {
if (msg.what == MSG_SET_BACK_BUTTON_ALPHA) {
mBackButtonAlpha = (float) msg.obj;
}
mBgHandler.obtainMessage(msg.what, msg.arg1, msg.arg2, msg.obj).sendToTarget();
return true;
}
private boolean handleBgMessage(Message msg) {
switch (msg.what) {
case MSG_SET_PROXY:
mISystemUiProxy = (ISystemUiProxy) msg.obj;
break;
case MSG_SET_BACK_BUTTON_ALPHA:
applyBackButtonAlpha((float) msg.obj, msg.arg1 == 1);
return true;
}
return true;
}
@WorkerThread
private void applyBackButtonAlpha(float alpha, boolean animate) {
if (mISystemUiProxy == null) {
return;
}
try {
mISystemUiProxy.setBackButtonAlpha(alpha, animate);
} catch (RemoteException e) {
Log.w(TAG, "Unable to update overview back button alpha", e);
}
}
private void onNavigationModeChanged(SysUINavigationMode.Mode mode) {
resetHomeBounceSeenOnQuickstepEnabledFirstTime();
}
private void resetHomeBounceSeenOnQuickstepEnabledFirstTime() {
if (modeSupportsGestures() && !Utilities.getPrefs(mContext).getBoolean(
HAS_ENABLED_QUICKSTEP_ONCE, true)) {
Utilities.getPrefs(mContext).edit()
.putBoolean(HAS_ENABLED_QUICKSTEP_ONCE, true)
.putBoolean(DiscoveryBounce.HOME_BOUNCE_SEEN, false)
.apply();
}
}
private boolean modeSupportsGestures() {
return SysUINavigationMode.getMode(mContext).hasGestures;
}
}
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