1 /*
2  * Copyright 2023 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 androidx.window.layout.adapter.extensions
18 
19 import android.content.Context
20 import androidx.core.util.Consumer
21 import androidx.window.layout.SupportedPosture
22 import androidx.window.layout.WindowLayoutInfo
23 import androidx.window.layout.adapter.WindowBackend
24 import java.util.concurrent.Executor
25 
26 internal open class ExtensionWindowBackendApi0 : WindowBackend {
27 
registerLayoutChangeCallbacknull28     override fun registerLayoutChangeCallback(
29         context: Context,
30         executor: Executor,
31         callback: Consumer<WindowLayoutInfo>
32     ) {
33         executor.execute { callback.accept(WindowLayoutInfo(emptyList())) }
34     }
35 
unregisterLayoutChangeCallbacknull36     override fun unregisterLayoutChangeCallback(callback: Consumer<WindowLayoutInfo>) {
37         // empty implementation since there are no consumers
38     }
39 
40     override val supportedPostures: List<SupportedPosture>
41         get() = throw UnsupportedOperationException("Extensions version must be at least 6")
42 
getCurrentWindowLayoutInfonull43     override fun getCurrentWindowLayoutInfo(context: Context): WindowLayoutInfo =
44         throw UnsupportedOperationException("Extensions version must be at least 9")
45 }
46