litho-widget/com.facebook.litho.widget/LinearLayoutInfo

LinearLayoutInfo

open class LinearLayoutInfo(linearLayoutManager: LinearLayoutManager) : LayoutInfo

An implementation for LayoutInfo to implement linear lists with a LinearLayoutManager.

Constructors

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@JvmOverloads
constructor(context: ComponentContext?, orientation: Int, reverseLayout: Boolean, stackFromEnd: Boolean = false)
@JvmOverloads
constructor(context: Context?, orientation: Int, reverseLayout: Boolean, stackFromEnd: Boolean = false)
constructor(linearLayoutManager: LinearLayoutManager)

Types

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object Companion
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class ViewportFiller(width: Int, height: Int, orientation: Int) : LayoutInfo.ViewportFiller

Simple implementation of LayoutInfo.ViewportFiller which fills the viewport by laying out items sequentially.

Functions

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open override fun approximateRangeSize(firstMeasuredItemWidth: Int, firstMeasuredItemHeight: Int, recyclerMeasuredWidth: Int, recyclerMeasuredHeight: Int): Int

This is called when the RecyclerBinder needs to calculate a range size. The returned value should be an approximate range size based on the size of the first measured item.

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open override fun computeWrappedHeight(maxHeight: Int, componentTreeHolders: List<ComponentTreeHolder>): Int
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open override fun createViewportFiller(measuredWidth: Int, measuredHeight: Int): LinearLayoutInfo.ViewportFiller?
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open override fun findFirstFullyVisibleItemPosition(): Int
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open override fun findFirstVisibleItemPosition(): Int
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open override fun findLastFullyVisibleItemPosition(): Int
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open override fun findLastVisibleItemPosition(): Int
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open override fun getChildHeightSpec(heightSpec: Int, renderInfo: RenderInfo): Int
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open override fun getChildWidthSpec(widthSpec: Int, renderInfo: RenderInfo): Int
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open override fun getItemCount(): Int
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open override fun getScrollDirection(): Int

This is the main scrolling direction that the LayoutManager passed to this binder will use.

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open override fun scrollToPositionWithOffset(position: Int, offset: Int)

RecyclerBinder delegates scrolling responsibilities to the LayoutInfo, as the varied LayoutManagers wrapped by a LayoutInfo lack a common scrolling interface. Typical implementations should forward the call to the underlying LayoutManager's scrollToPositionWithOffset() or an equivalent.

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open override fun setRenderInfoCollection(renderInfoCollection: LayoutInfo.RenderInfoCollection?)