litho-core/com.facebook.litho/SizeSpec

SizeSpec

A SizeSpec encapsulates the layout requirements passed from parent to child. Each SizeSpec represents a requirement for either the width or the height. A SizeSpec is comprised of a size and a mode. There are two possible modes:

UNSPECIFIED : The parent has not imposed any constraint on the child. It can be whatever size it wants.

EXACTLY : The parent has determined an exact size for the child. The child is going to be given those bounds regardless of how big it wants to be. SizeSpecs are implemented as ints to reduce object allocation. This class is provided to pack and unpack the tuple into the int.

Types

MeasureSpecMode

annotation class MeasureSpecMode

Properties

AT_MOST

const val AT_MOST: Int

Size specification mode: The child can be as large as it wants up to the specified size.

EXACTLY

const val EXACTLY: Int

Size specification mode: The parent has determined an exact size for the child. The child is going to be given those bounds regardless of how big it wants to be.

NONE

const val NONE: Int

Size specification is not specified.

UNSPECIFIED

const val UNSPECIFIED: Int

Size specification mode: The parent has not imposed any constraint on the child. It can be whatever size it wants.