| /* |
| * Copyright 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package androidx.compose.foundation.lazy |
| |
| import androidx.compose.ui.layout.Placeable |
| |
| /** |
| * The result of the measure pass for lazy list layout. |
| */ |
| internal class LazyListMeasureResult( |
| // properties defining the scroll position: |
| /** The new first visible item.*/ |
| val firstVisibleItem: LazyMeasuredItem?, |
| /** The new value for [LazyListState.firstVisibleItemScrollOffset].*/ |
| val firstVisibleItemScrollOffset: Int, |
| /** True if there is some space available to continue scrolling in the forward direction.*/ |
| val canScrollForward: Boolean, |
| /** The amount of scroll consumed during the measure pass.*/ |
| val consumedScroll: Float, |
| /** List of items which were composed, but are not a part of [visibleItemsInfo].*/ |
| val composedButNotVisibleItems: List<LazyMeasuredItem>?, |
| // properties to be used by the Layout's measure result |
| /** The calculated layout width */ |
| val layoutWidth: Int, |
| /** The calculated layout height */ |
| val layoutHeight: Int, |
| /** The placement block */ |
| val placementBlock: Placeable.PlacementScope.() -> Unit, |
| // properties representing the info needed for LazyListLayoutInfo |
| /** see [LazyListLayoutInfo.visibleItemsInfo] */ |
| override val visibleItemsInfo: List<LazyListItemInfo>, |
| /** see [LazyListLayoutInfo.viewportStartOffset] */ |
| override val viewportStartOffset: Int, |
| /** see [LazyListLayoutInfo.viewportEndOffset] */ |
| override val viewportEndOffset: Int, |
| /** see [LazyListLayoutInfo.totalItemsCount] */ |
| override val totalItemsCount: Int, |
| ) : LazyListLayoutInfo |