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 android.view; 18 19 import android.view.IDisplayWindowRotationCallback; 20 21 /** 22 * Singular controller of a "remote" display rotation. When a display rotation is started, WM 23 * freezes the screen. It will then call into this controller and wait for a response via the 24 * callback. 25 * 26 * This needs to provide configuration changes because those changes need to be applied in sync 27 * with the actual display rotation to prevent relayouts with mismatched information. 28 * 29 * The flow is like this: 30 * 1. DisplayContent/Rotation freezes the screen 31 * 2. This controller is notified of a rotation and provided a callback. 32 * 3. This controller is responsible for collecting a set of configuration changes to go along with 33 * the rotation. 34 * 4. The callback is fired which tells DisplayContent/Rotation to apply the provided configuration 35 * changes and continue the rotation. 36 * 37 * @hide 38 */ 39 oneway interface IDisplayWindowRotationController { 40 41 /** 42 * Called when WM needs to know how to update tasks in response to a display rotation. 43 * If this isn't called, a timeout will continue the rotation in WM. 44 * 45 * @param displayId the display that is rotating. 46 * @param fromRotation the rotation the display is rotating from. 47 * @param toRotation the rotation the display is rotating to. 48 * @param callback A callback to be called when this has calculated updated configs. 49 */ onRotateDisplay(int displayId, int fromRotation, int toRotation, in IDisplayWindowRotationCallback callback)50 void onRotateDisplay(int displayId, int fromRotation, int toRotation, 51 in IDisplayWindowRotationCallback callback); 52 } 53