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.settingslib.spa.framework.compose 18 19 import androidx.compose.foundation.lazy.LazyListState 20 import androidx.compose.foundation.lazy.rememberLazyListState 21 import androidx.compose.runtime.Composable 22 import androidx.compose.runtime.LaunchedEffect 23 import androidx.compose.runtime.snapshotFlow 24 import androidx.compose.ui.platform.LocalSoftwareKeyboardController 25 import kotlinx.coroutines.flow.distinctUntilChanged 26 import kotlinx.coroutines.flow.filter 27 28 /** 29 * An action when run, hides the keyboard if it's open. 30 */ 31 @Composable hideKeyboardActionnull32fun hideKeyboardAction(): () -> Unit { 33 val keyboardController = LocalSoftwareKeyboardController.current 34 return { keyboardController?.hide() } 35 } 36 37 /** 38 * Creates a [LazyListState] that is remembered across compositions. 39 * 40 * And when user scrolling the lazy list, hides the keyboard if it's open. 41 */ 42 @Composable rememberLazyListStateAndHideKeyboardWhenStartScrollnull43fun rememberLazyListStateAndHideKeyboardWhenStartScroll(): LazyListState { 44 val listState = rememberLazyListState() 45 val keyboardController = LocalSoftwareKeyboardController.current 46 LaunchedEffect(listState) { 47 snapshotFlow { listState.isScrollInProgress } 48 .distinctUntilChanged() 49 .filter { it } 50 .collect { keyboardController?.hide() } 51 } 52 return listState 53 } 54