1 /* <lambda>null2 * Copyright (C) 2024 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.quickstep 18 19 import android.content.Context 20 import android.hardware.display.DisplayManager 21 import android.util.Log 22 import android.util.SparseArray 23 import android.view.Display 24 import androidx.core.util.valueIterator 25 import com.android.quickstep.DisplayModel.DisplayResource 26 import com.android.quickstep.SystemDecorationChangeObserver.Companion.INSTANCE 27 import com.android.quickstep.SystemDecorationChangeObserver.DisplayDecorationListener 28 import java.io.PrintWriter 29 30 /** data model for managing resources with lifecycles that match that of the connected display */ 31 abstract class DisplayModel<RESOURCE_TYPE : DisplayResource>(val context: Context) : 32 DisplayDecorationListener { 33 34 companion object { 35 private const val TAG = "DisplayModel" 36 private const val DEBUG = false 37 } 38 39 private val displayManager = context.getSystemService(Context.DISPLAY_SERVICE) as DisplayManager 40 private var systemDecorationChangeObserver: SystemDecorationChangeObserver? = null 41 protected val displayResourceArray = SparseArray<RESOURCE_TYPE>() 42 43 override fun onDisplayAddSystemDecorations(displayId: Int) { 44 if (DEBUG) Log.d(TAG, "onDisplayAdded: displayId=$displayId") 45 storeDisplayResource(displayId) 46 } 47 48 override fun onDisplayRemoved(displayId: Int) { 49 if (DEBUG) Log.d(TAG, "onDisplayRemoved: displayId=$displayId") 50 deleteDisplayResource(displayId) 51 } 52 53 override fun onDisplayRemoveSystemDecorations(displayId: Int) { 54 if (DEBUG) Log.d(TAG, "onDisplayRemoveSystemDecorations: displayId=$displayId") 55 deleteDisplayResource(displayId) 56 } 57 58 protected abstract fun createDisplayResource(display: Display): RESOURCE_TYPE 59 60 protected fun initializeDisplays() { 61 systemDecorationChangeObserver = INSTANCE[context] 62 systemDecorationChangeObserver?.registerDisplayDecorationListener(this) 63 displayManager.displays 64 .filter { getDisplayResource(it.displayId) == null } 65 .forEach { storeDisplayResource(it.displayId) } 66 } 67 68 fun destroy() { 69 systemDecorationChangeObserver?.unregisterDisplayDecorationListener(this) 70 systemDecorationChangeObserver = null 71 displayResourceArray.valueIterator().forEach { displayResource -> 72 displayResource.cleanup() 73 } 74 displayResourceArray.clear() 75 } 76 77 fun getDisplayResource(displayId: Int): RESOURCE_TYPE? { 78 if (DEBUG) Log.d(TAG, Log.getStackTraceString(Throwable("get: displayId=$displayId"))) 79 return displayResourceArray[displayId] 80 } 81 82 fun deleteDisplayResource(displayId: Int) { 83 if (DEBUG) Log.d(TAG, "delete: displayId=$displayId") 84 getDisplayResource(displayId)?.let { 85 it.cleanup() 86 displayResourceArray.remove(displayId) 87 } 88 } 89 90 fun storeDisplayResource(displayId: Int) { 91 if (DEBUG) Log.d(TAG, "store: displayId=$displayId") 92 getDisplayResource(displayId)?.let { 93 return 94 } 95 val display = displayManager.getDisplay(displayId) 96 if (display == null) { 97 if (DEBUG) 98 Log.w( 99 TAG, 100 "storeDisplayResource: could not create display for displayId=$displayId", 101 Exception(), 102 ) 103 return 104 } 105 displayResourceArray[displayId] = createDisplayResource(display) 106 } 107 108 fun dump(prefix: String, writer: PrintWriter) { 109 writer.println("${prefix}${this::class.simpleName}: display resources=[") 110 111 displayResourceArray.valueIterator().forEach { displayResource -> 112 displayResource.dump("${prefix}\t", writer) 113 } 114 writer.println("${prefix}]") 115 } 116 117 abstract class DisplayResource { 118 abstract fun cleanup() 119 120 abstract fun dump(prefix: String, writer: PrintWriter) 121 } 122 } 123