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/**
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.view;
import android.view.IDisplayChangeWindowCallback;
import android.window.DisplayAreaInfo;
/**
* Singular controller of a "remote" display change. When a display rotation or change is started,
* WM freezes the screen. It will then call into this controller and wait for a response via the
* callback.
*
* This needs to provide configuration changes because those changes need to be applied in sync
* with the actual display rotation to prevent relayouts with mismatched information.
*
* The flow is like this:
* 1. DisplayContent/Rotation freezes the screen
* 2. This controller is notified of a rotation and provided a callback.
* 3. This controller is responsible for collecting a set of configuration changes to go along with
* the rotation.
* 4. The callback is fired which tells DisplayContent/Rotation to apply the provided configuration
* changes and continue the rotation.
*
* @hide
*/
oneway interface IDisplayChangeWindowController {
/**
* Called when WM needs to know how to update tasks in response to a display change.
* If this isn't called, a timeout will continue the change in WM.
*
* @param fromRotation the old rotation
* @param newRotation the new rotation
* @param newDisplayAreaInfo the new display area info after the change
* @param callback A callback to be called when this has calculated updated configs.
*/
void onDisplayChange(int displayId, int fromRotation, int toRotation,
in DisplayAreaInfo newDisplayAreaInfo, in IDisplayChangeWindowCallback callback);
}
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