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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 static com.android.systemui.shared.system.NavigationBarCompat.FLAG_DISABLE_QUICK_SCRUB;
import static com.android.systemui.shared.system.NavigationBarCompat.FLAG_DISABLE_SWIPE_UP;
import static com.android.systemui.shared.system.NavigationBarCompat.FLAG_HIDE_BACK_BUTTON;
import static com.android.systemui.shared.system.NavigationBarCompat.FLAG_SHOW_OVERVIEW_BUTTON;
import static com.android.systemui.shared.system.SettingsCompat.SWIPE_UP_SETTING_NAME;
import android.content.ContentResolver;
import android.content.Context;
import android.database.ContentObserver;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteException;
import android.provider.Settings;
import android.support.annotation.WorkerThread;
import android.util.Log;
import com.android.launcher3.MainThreadExecutor;
import com.android.launcher3.util.UiThreadHelper;
import com.android.systemui.shared.recents.ISystemUiProxy;
import java.util.concurrent.ExecutionException;
/**
* Sets overview interaction flags, such as:
*
* - FLAG_DISABLE_QUICK_SCRUB
* - FLAG_DISABLE_SWIPE_UP
* - FLAG_HIDE_BACK_BUTTON
* - FLAG_SHOW_OVERVIEW_BUTTON
*
* @see com.android.systemui.shared.system.NavigationBarCompat.InteractionType and associated flags.
*/
public class OverviewInteractionState {
private static final String TAG = "OverviewFlags";
// We do not need any synchronization for this variable as its only written on UI thread.
private static OverviewInteractionState INSTANCE;
public static OverviewInteractionState getInstance(final Context context) {
if (INSTANCE == null) {
if (Looper.myLooper() == Looper.getMainLooper()) {
INSTANCE = new OverviewInteractionState(context.getApplicationContext());
} else {
try {
return new MainThreadExecutor().submit(
() -> OverviewInteractionState.getInstance(context)).get();
} catch (InterruptedException|ExecutionException e) {
throw new RuntimeException(e);
}
}
}
return INSTANCE;
}
private static final int MSG_SET_PROXY = 200;
private static final int MSG_SET_BACK_BUTTON_VISIBLE = 201;
private static final int MSG_SET_SWIPE_UP_ENABLED = 202;
private final SwipeUpGestureEnabledSettingObserver mSwipeUpSettingObserver;
private final Handler mUiHandler;
private final Handler mBgHandler;
// These are updated on the background thread
private ISystemUiProxy mISystemUiProxy;
private boolean mBackButtonVisible = true;
private boolean mSwipeUpEnabled = true;
private Runnable mOnSwipeUpSettingChangedListener;
private OverviewInteractionState(Context context) {
mUiHandler = new Handler(this::handleUiMessage);
mBgHandler = new Handler(UiThreadHelper.getBackgroundLooper(), this::handleBgMessage);
mSwipeUpSettingObserver = new SwipeUpGestureEnabledSettingObserver(mUiHandler,
context.getContentResolver());
mSwipeUpSettingObserver.register();
}
public boolean isSwipeUpGestureEnabled() {
return mSwipeUpEnabled;
}
public void setBackButtonVisible(boolean visible) {
mUiHandler.removeMessages(MSG_SET_BACK_BUTTON_VISIBLE);
mUiHandler.obtainMessage(MSG_SET_BACK_BUTTON_VISIBLE, visible ? 1 : 0, 0)
.sendToTarget();
}
public void setSystemUiProxy(ISystemUiProxy proxy) {
mBgHandler.obtainMessage(MSG_SET_PROXY, proxy).sendToTarget();
}
private boolean handleUiMessage(Message msg) {
mBgHandler.obtainMessage(msg.what, msg.arg1, msg.arg2).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_VISIBLE:
mBackButtonVisible = msg.arg1 != 0;
break;
case MSG_SET_SWIPE_UP_ENABLED:
mSwipeUpEnabled = msg.arg1 != 0;
if (mOnSwipeUpSettingChangedListener != null) {
mOnSwipeUpSettingChangedListener.run();
}
break;
}
applyFlags();
return true;
}
public void setOnSwipeUpSettingChangedListener(Runnable listener) {
mOnSwipeUpSettingChangedListener = listener;
}
@WorkerThread
private void applyFlags() {
if (mISystemUiProxy == null) {
return;
}
int flags;
if (mSwipeUpEnabled) {
flags = mBackButtonVisible ? 0 : FLAG_HIDE_BACK_BUTTON;
} else {
flags = FLAG_DISABLE_SWIPE_UP | FLAG_DISABLE_QUICK_SCRUB | FLAG_SHOW_OVERVIEW_BUTTON;
}
try {
mISystemUiProxy.setInteractionState(flags);
} catch (RemoteException e) {
Log.w(TAG, "Unable to update overview interaction flags", e);
}
}
private class SwipeUpGestureEnabledSettingObserver extends ContentObserver {
private Handler mHandler;
private ContentResolver mResolver;
SwipeUpGestureEnabledSettingObserver(Handler handler, ContentResolver resolver) {
super(handler);
mHandler = handler;
mResolver = resolver;
}
public void register() {
mResolver.registerContentObserver(Settings.Secure.getUriFor(SWIPE_UP_SETTING_NAME),
false, this);
mSwipeUpEnabled = getValue();
}
@Override
public void onChange(boolean selfChange) {
super.onChange(selfChange);
mHandler.removeMessages(MSG_SET_SWIPE_UP_ENABLED);
mHandler.obtainMessage(MSG_SET_SWIPE_UP_ENABLED, getValue() ? 1 : 0, 0).sendToTarget();
}
private boolean getValue() {
return Settings.Secure.getInt(mResolver, SWIPE_UP_SETTING_NAME, 0) == 1;
}
}
}
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