1 /*
2 * Copyright (C) 2022 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 com.android.systemui.util.kotlin
18
19 import android.view.View
20 import androidx.lifecycle.Lifecycle
21 import androidx.lifecycle.repeatOnLifecycle
22 import com.android.systemui.lifecycle.repeatWhenAttached
23 import java.util.function.Consumer
24 import kotlin.coroutines.CoroutineContext
25 import kotlin.coroutines.EmptyCoroutineContext
26 import kotlinx.coroutines.flow.Flow
27 import kotlinx.coroutines.flow.collect
28
29 /**
30 * Collect information for the given [flow], calling [consumer] for each emitted event. Defaults to
31 * [LifeCycle.State.CREATED] to better align with legacy ViewController usage of attaching listeners
32 * during onViewAttached() and removing during onViewRemoved()
33 */
34 @JvmOverloads
collectFlownull35 fun <T> collectFlow(
36 view: View,
37 flow: Flow<T>,
38 consumer: Consumer<T>,
39 coroutineContext: CoroutineContext = EmptyCoroutineContext,
40 state: Lifecycle.State = Lifecycle.State.CREATED,
41 ) {
42 view.repeatWhenAttached(coroutineContext) {
43 repeatOnLifecycle(state) { flow.collect { consumer.accept(it) } }
44 }
45 }
46