Merge "Adjust scroll position when smartspace content appears." into main

import androidx.compose.material3.OutlinedButton

import androidx.compose.material3.Text

import androidx.compose.runtime.Composable

import androidx.compose.runtime.LaunchedEffect

import androidx.compose.runtime.State

import androidx.compose.runtime.collectAsState

import androidx.compose.runtime.derivedStateOf

import androidx.compose.runtime.remember

import androidx.compose.runtime.rememberCoroutineScope

import androidx.compose.runtime.setValue

import androidx.compose.runtime.snapshotFlow

import androidx.compose.ui.Alignment

import androidx.compose.ui.ExperimentalComposeUiApi

import androidx.compose.ui.Modifier

    val contentPadding = gridContentPadding(viewModel.isEditMode, toolbarSize)

    val contentOffset = beforeContentPadding(contentPadding).toOffset()

    ScrollOnNewSmartspaceEffect(viewModel, gridState)

    Box(

        modifier =

            modifier

    }

}

@Composable

private fun ScrollOnNewSmartspaceEffect(

    viewModel: BaseCommunalViewModel,

    gridState: LazyGridState

) {

    val communalContent by viewModel.communalContent.collectAsState(initial = emptyList())

    var smartspaceCount by remember { mutableStateOf(0) }

    LaunchedEffect(communalContent) {

        snapshotFlow { gridState.firstVisibleItemIndex }

            .collect { index ->

                val existingSmartspaceCount = smartspaceCount

                smartspaceCount = communalContent.count { it.isSmartspace() }

                val firstIndex = communalContent.indexOfFirst { it.isSmartspace() }

                // Scroll to the beginning of the smartspace area whenever the number of

                // smartspace elements grows

                if (

                    existingSmartspaceCount < smartspaceCount &&

                        !viewModel.isEditMode &&

                        index > firstIndex

                ) {

                    gridState.animateScrollToItem(firstIndex)

                }

            }

    }

}

@OptIn(ExperimentalFoundationApi::class)

@Composable

private fun BoxScope.CommunalHubLazyGrid(

    }

    fun isWidgetContent() = this is WidgetContent

    fun isSmartspace() = this is Smartspace

}