/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the
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* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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package com.android.systemui;
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import android.os.RemoteException;
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import android.util.Log;
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import android.view.IDockedStackListener;
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import android.view.WindowManagerGlobal;
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import java.lang.ref.WeakReference;
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import java.util.ArrayList;
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import java.util.function.Consumer;
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/**
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* Utility wrapper to listen for whether or not a docked stack exists, to be
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* used for things like the different overview icon in that mode.
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*/
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public class DockedStackExistsListener {
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private static final String TAG = "DockedStackExistsListener";
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private static ArrayList<WeakReference<Consumer<Boolean>>> sCallbacks = new ArrayList<>();
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private static boolean mLastExists;
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static {
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try {
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WindowManagerGlobal.getWindowManagerService().registerDockedStackListener(
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new IDockedStackListener.Stub() {
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@Override
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public void onDividerVisibilityChanged(boolean b) throws RemoteException {
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}
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@Override
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public void onDockedStackExistsChanged(boolean exists)
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throws RemoteException {
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DockedStackExistsListener.onDockedStackExistsChanged(exists);
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}
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@Override
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public void onDockedStackMinimizedChanged(boolean b, long l, boolean b1)
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throws RemoteException {
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}
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@Override
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public void onAdjustedForImeChanged(boolean b, long l)
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throws RemoteException {
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}
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@Override
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public void onDockSideChanged(int i) throws RemoteException {
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}
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});
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} catch (RemoteException e) {
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Log.e(TAG, "Failed registering docked stack exists listener", e);
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}
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}
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private static void onDockedStackExistsChanged(boolean exists) {
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mLastExists = exists;
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synchronized (sCallbacks) {
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sCallbacks.removeIf(wf -> {
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Consumer<Boolean> l = wf.get();
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if (l != null) l.accept(exists);
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return l == null;
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});
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}
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}
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public static void register(Consumer<Boolean> callback) {
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callback.accept(mLastExists);
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synchronized (sCallbacks) {
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sCallbacks.add(new WeakReference<>(callback));
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}
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}
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}
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