/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.systemui.util;
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import static androidx.lifecycle.Lifecycle.State.DESTROYED;
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import static androidx.lifecycle.Lifecycle.State.RESUMED;
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import android.view.View;
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import android.view.View.OnAttachStateChangeListener;
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import androidx.annotation.NonNull;
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import androidx.lifecycle.Lifecycle;
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import androidx.lifecycle.LifecycleOwner;
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import androidx.lifecycle.LifecycleRegistry;
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/**
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* Tools for generating lifecycle from sysui objects.
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*/
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public class SysuiLifecycle {
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private SysuiLifecycle() {
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}
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/**
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* Get a lifecycle that will be put into the resumed state when the view is attached
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* and goes to the destroyed state when the view is detached.
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*/
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public static LifecycleOwner viewAttachLifecycle(View v) {
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return new ViewLifecycle(v);
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}
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private static class ViewLifecycle implements LifecycleOwner, OnAttachStateChangeListener {
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private final LifecycleRegistry mLifecycle = new LifecycleRegistry(this);
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ViewLifecycle(View v) {
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v.addOnAttachStateChangeListener(this);
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}
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@NonNull
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@Override
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public Lifecycle getLifecycle() {
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return mLifecycle;
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}
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@Override
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public void onViewAttachedToWindow(View v) {
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mLifecycle.markState(RESUMED);
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}
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@Override
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public void onViewDetachedFromWindow(View v) {
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mLifecycle.markState(DESTROYED);
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}
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}
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}
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