1 /* 2 * Copyright (C) 2023 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.systemui.scene.ui.view 18 19 import dagger.Subcomponent 20 21 /** 22 * A component providing access to [WindowRootView]. 23 * 24 * Injecting [WindowRootView] directly into controllers can lead to crash loops. This is because 25 * [WindowRootView] contains [NotificationStackScrollLayout] and that view accesses [Dependency.get] 26 * in its constructor. If [Dependency.get] is not set up when your controller is constructed (which 27 * is possible because there are no guarantees from Dagger about the order of construction), then 28 * trying to inflate [NotificationStackScrollLayout] will crash. This component provides a way to 29 * fetch [WindowRootView] after the full Dagger graph is set up, which ensures that the inflation 30 * won't fail. 31 * 32 * This component is intended to be *temporary* and *only used from [CentralSurfacesImpl]*. Once 33 * [Dependency.get] is removed from [NotificationStackScrollLayout], we should re-attempt injecting 34 * [WindowRootView] directly into its controller [NotificationShadeWindowController]. 35 */ 36 @Subcomponent 37 interface WindowRootViewComponent { 38 39 @Subcomponent.Factory 40 interface Factory { createnull41 fun create(): WindowRootViewComponent 42 } 43 44 /** Fetches the root view of the main SysUI window. */ 45 fun getWindowRootView(): WindowRootView 46 } 47