1 /* 2 * Copyright (C) 2019 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.server.wm; 18 19 import android.content.res.Configuration; 20 import android.os.RemoteCallbackList; 21 import android.os.RemoteException; 22 import android.view.IDisplayWindowListener; 23 24 /** 25 * Manages dispatch of relevant hierarchy changes to interested listeners. Listeners are assumed 26 * to be remote. 27 */ 28 class DisplayWindowListenerController { 29 RemoteCallbackList<IDisplayWindowListener> mDisplayListeners = new RemoteCallbackList<>(); 30 31 // private final ArrayList<DisplayContainerListener> mDisplayListeners = new ArrayList<>(); 32 private final WindowManagerService mService; 33 DisplayWindowListenerController(WindowManagerService service)34 DisplayWindowListenerController(WindowManagerService service) { 35 mService = service; 36 } 37 registerListener(IDisplayWindowListener listener)38 void registerListener(IDisplayWindowListener listener) { 39 synchronized (mService.mGlobalLock) { 40 mDisplayListeners.register(listener); 41 try { 42 for (int i = 0; i < mService.mAtmService.mRootWindowContainer.getChildCount(); 43 ++i) { 44 DisplayContent d = mService.mAtmService.mRootWindowContainer.getChildAt(i); 45 listener.onDisplayAdded(d.mDisplayId); 46 } 47 } catch (RemoteException e) { } 48 } 49 } 50 unregisterListener(IDisplayWindowListener listener)51 void unregisterListener(IDisplayWindowListener listener) { 52 mDisplayListeners.unregister(listener); 53 } 54 dispatchDisplayAdded(DisplayContent display)55 void dispatchDisplayAdded(DisplayContent display) { 56 int count = mDisplayListeners.beginBroadcast(); 57 for (int i = 0; i < count; ++i) { 58 try { 59 mDisplayListeners.getBroadcastItem(i).onDisplayAdded(display.mDisplayId); 60 } catch (RemoteException e) { 61 } 62 } 63 mDisplayListeners.finishBroadcast(); 64 } 65 dispatchDisplayChanged(DisplayContent display, Configuration newConfig)66 void dispatchDisplayChanged(DisplayContent display, Configuration newConfig) { 67 // Only report changed if this has actually been added to the hierarchy already. 68 boolean isInHierarchy = false; 69 for (int i = 0; i < display.getParent().getChildCount(); ++i) { 70 if (display.getParent().getChildAt(i) == display) { 71 isInHierarchy = true; 72 } 73 } 74 if (!isInHierarchy) { 75 return; 76 } 77 int count = mDisplayListeners.beginBroadcast(); 78 for (int i = 0; i < count; ++i) { 79 try { 80 mDisplayListeners.getBroadcastItem(i).onDisplayConfigurationChanged( 81 display.getDisplayId(), newConfig); 82 } catch (RemoteException e) { 83 } 84 } 85 mDisplayListeners.finishBroadcast(); 86 } 87 dispatchDisplayRemoved(DisplayContent display)88 void dispatchDisplayRemoved(DisplayContent display) { 89 int count = mDisplayListeners.beginBroadcast(); 90 for (int i = 0; i < count; ++i) { 91 try { 92 mDisplayListeners.getBroadcastItem(i).onDisplayRemoved(display.mDisplayId); 93 } catch (RemoteException e) { 94 } 95 } 96 mDisplayListeners.finishBroadcast(); 97 } 98 dispatchFixedRotationStarted(DisplayContent display, int newRotation)99 void dispatchFixedRotationStarted(DisplayContent display, int newRotation) { 100 int count = mDisplayListeners.beginBroadcast(); 101 for (int i = 0; i < count; ++i) { 102 try { 103 mDisplayListeners.getBroadcastItem(i).onFixedRotationStarted( 104 display.mDisplayId, newRotation); 105 } catch (RemoteException e) { 106 } 107 } 108 mDisplayListeners.finishBroadcast(); 109 } 110 dispatchFixedRotationFinished(DisplayContent display)111 void dispatchFixedRotationFinished(DisplayContent display) { 112 int count = mDisplayListeners.beginBroadcast(); 113 for (int i = 0; i < count; ++i) { 114 try { 115 mDisplayListeners.getBroadcastItem(i).onFixedRotationFinished(display.mDisplayId); 116 } catch (RemoteException e) { 117 } 118 } 119 mDisplayListeners.finishBroadcast(); 120 } 121 } 122