1 /*
2  * Copyright 2024 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.compose.ui.semantics
18 
19 /** A listener that can be used to observe semantic changes. */
20 internal interface SemanticsListener {
21 
22     /**
23      * [onSemanticsChanged] is called when the [SemanticsConfiguration] of a LayoutNode changes, or
24      * when a node calls SemanticsModifierNode.invalidateSemantics.
25      *
26      * @param semanticsInfo the current [SemanticsInfo] of the layout node that has changed.
27      * @param previousSemanticsConfiguration the previous [SemanticsConfiguration] associated with
28      *   the layout node.
29      */
onSemanticsChangednull30     fun onSemanticsChanged(
31         semanticsInfo: SemanticsInfo,
32         previousSemanticsConfiguration: SemanticsConfiguration?
33     )
34 }
35