com.facebook.litho

Class LayoutState

java.lang.Object

com.facebook.litho.LayoutState

All Implemented Interfaces:

IncrementalMountExtension.IncrementalMountExtensionInput, TransitionsExtension.TransitionsExtensionInput, com.facebook.litho.VisibilityOutputsExtension.VisibilityOutputsExtensionInput, MountDelegate.MountDelegateInput

public class LayoutState
extends Object
implements IncrementalMountExtension.IncrementalMountExtensionInput, com.facebook.litho.VisibilityOutputsExtension.VisibilityOutputsExtensionInput, TransitionsExtension.TransitionsExtensionInput

The main role of LayoutState is to hold the output of layout calculation. This includes mountable outputs and visibility outputs. A centerpiece of the class is collectResults(RenderTreeNode, ComponentContext, DebugHierarchy.Node, InternalNode, LayoutState, DiffNode) which prepares the before-mentioned outputs based on the provided InternalNode for later use in MountState.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	LayoutState.CalculateLayoutSource

Method Summary

Modifier and Type	Method and Description
protected void	clearCachedLayout(Component component)
DiffNode	getDiffTree()
int	getLayoutOutputPositionForId(long layoutOutputId)
InternalNode	getLayoutRoot()
RenderTreeNode	getMountableOutputAt(int index)
ArrayList<RenderTreeNode>	getMountableOutputBottoms()
int	getMountableOutputCount()
ArrayList<RenderTreeNode>	getMountableOutputTops()
VisibilityModuleInput	getVisibilityModuleInput()
List<com.facebook.litho.VisibilityOutput>	getVisibilityOutputs()
boolean	hasMounted()
boolean	isIncrementalVisibilityEnabled()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

isIncrementalVisibilityEnabled

public boolean isIncrementalVisibilityEnabled()

Specified by:

isIncrementalVisibilityEnabled in interface com.facebook.litho.VisibilityOutputsExtension.VisibilityOutputsExtensionInput

clearCachedLayout

protected void clearCachedLayout(Component component)

getMountableOutputCount

public int getMountableOutputCount()

Specified by:

getMountableOutputCount in interface IncrementalMountExtension.IncrementalMountExtensionInput

getMountableOutputAt

public RenderTreeNode getMountableOutputAt(int index)

Specified by:

getMountableOutputAt in interface MountDelegate.MountDelegateInput

getMountableOutputTops

public ArrayList<RenderTreeNode> getMountableOutputTops()

Specified by:

getMountableOutputTops in interface IncrementalMountExtension.IncrementalMountExtensionInput

getMountableOutputBottoms

public ArrayList<RenderTreeNode> getMountableOutputBottoms()

Specified by:

getMountableOutputBottoms in interface IncrementalMountExtension.IncrementalMountExtensionInput

getVisibilityOutputs

public List<com.facebook.litho.VisibilityOutput> getVisibilityOutputs()

Specified by:

getVisibilityOutputs in interface com.facebook.litho.VisibilityOutputsExtension.VisibilityOutputsExtensionInput

getVisibilityModuleInput

public VisibilityModuleInput getVisibilityModuleInput()

Specified by:

getVisibilityModuleInput in interface com.facebook.litho.VisibilityOutputsExtension.VisibilityOutputsExtensionInput

getDiffTree

public DiffNode getDiffTree()

getLayoutRoot

public InternalNode getLayoutRoot()

getLayoutOutputPositionForId

public int getLayoutOutputPositionForId(long layoutOutputId)

Specified by:

getLayoutOutputPositionForId in interface IncrementalMountExtension.IncrementalMountExtensionInput

Specified by:

getLayoutOutputPositionForId in interface MountDelegate.MountDelegateInput

Returns:

the position of the LayoutOutput with id layoutOutputId in the LayoutState list of outputs or -1 if no LayoutOutput with that id exists in the LayoutState

hasMounted

public boolean hasMounted()

Specified by:

hasMounted in interface TransitionsExtension.TransitionsExtensionInput