Wale Ogunwale | 26c0dfe | 2016-12-14 14:42:30 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2016 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.os.IBinder; |
| 20 | |
| 21 | import java.util.HashMap; |
| 22 | |
| 23 | /** |
| 24 | * Class that allows the owner/creator of a {@link WindowContainer} to communicate directly with the |
| 25 | * container and make changes. |
| 26 | * Note that public calls (mostly in sub-classes) into this class are assumed to be originating from |
| 27 | * outside the window manager so the window manager lock is held and appropriate permissions are |
| 28 | * checked before calls are allowed to proceed. |
| 29 | * |
| 30 | * Test class: {@link WindowContainerControllerTests} |
| 31 | */ |
| 32 | class WindowContainerController<E extends WindowContainer, I extends WindowContainerListener> { |
| 33 | |
| 34 | final WindowManagerService mService; |
| 35 | final RootWindowContainer mRoot; |
| 36 | final HashMap<IBinder, WindowState> mWindowMap; |
| 37 | |
| 38 | // The window container this controller owns. |
| 39 | E mContainer; |
| 40 | // Interface for communicating changes back to the owner. |
| 41 | final I mListener; |
| 42 | |
| 43 | WindowContainerController(I listener, WindowManagerService service) { |
| 44 | mListener = listener; |
| 45 | mService = service; |
| 46 | mRoot = mService != null ? mService.mRoot : null; |
| 47 | mWindowMap = mService != null ? mService.mWindowMap : null; |
| 48 | } |
| 49 | |
| 50 | void setContainer(E container) { |
| 51 | if (mContainer != null && container != null) { |
| 52 | throw new IllegalArgumentException("Can't set container=" + container |
| 53 | + " for controller=" + this + " Already set to=" + mContainer); |
| 54 | } |
| 55 | mContainer = container; |
| 56 | } |
| 57 | |
| 58 | void removeContainer() { |
| 59 | // TODO: See if most uses cases should support removeIfPossible here. |
| 60 | //mContainer.removeIfPossible(); |
| 61 | if (mContainer != null) { |
| 62 | mContainer.setController(null); |
| 63 | mContainer = null; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | boolean checkCallingPermission(String permission, String func) { |
| 68 | return mService.checkCallingPermission(permission, func); |
| 69 | } |
| 70 | } |