1 /*
2  * Copyright 2021 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.paging
18 
19 class LoadStateCapture : (LoadType, LoadState) -> Unit {
20     private var lastEventsListIndex = -1
21 
22     val events = mutableListOf<LoadStateEvent>()
23 
invokenull24     override fun invoke(type: LoadType, state: LoadState) {
25         events.add(LoadStateEvent(type, state))
26     }
27 
newEventsnull28     fun newEvents(): List<LoadStateEvent> {
29         return events.drop(lastEventsListIndex + 1).also { lastEventsListIndex = events.lastIndex }
30     }
31 }
32 
33 data class LoadStateEvent(
34     val loadType: LoadType,
35     val loadState: LoadState,
36 )
37