1 /* 2 * Copyright (C) 2025 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.app.displaylib 18 19 import kotlinx.coroutines.flow.MutableStateFlow 20 import kotlinx.coroutines.flow.StateFlow 21 22 /** 23 * Reports the display ids that should have a per-display instance, if any. 24 * 25 * This can be overridden to support different policies (e.g. display being connected, display 26 * having decorations, etc..). A [PerDisplayRepository] instance is expected to be cleaned up when a 27 * displayId is removed from this set. 28 */ 29 interface DisplayInstanceLifecycleManager { 30 /** Set of display ids that are allowed to have an instance. */ 31 val displayIds: StateFlow<Set<Int>> 32 } 33 34 /** Meant to be used in tests. */ 35 class FakeDisplayInstanceLifecycleManager : DisplayInstanceLifecycleManager { 36 override val displayIds = MutableStateFlow<Set<Int>>(emptySet()) 37 } 38