com.facebook.rendercore.visibility

Class IncrementalModule

java.lang.Object

com.facebook.rendercore.visibility.IncrementalModule

public class IncrementalModule
extends Object

Module for incrementally checking whether items are entering/exiting a range and perform operations when those events occur. Example use cases: incrementally mounting components when scrolling, incrementally processing visibility handlers.

Field Summary

Fields

Modifier and Type	Field and Description
static Comparator<IncrementalModuleItem>	sBottomsComparator
static Comparator<IncrementalModuleItem>	sTopsComparators

Constructor Summary

Constructors

Constructor and Description
IncrementalModule(View view)

Method Summary

Modifier and Type	Method and Description
void	clearIncrementalItems() Triggers exit range callbacks for all items which were inside the range, used for example when the LithoView is not visible anymore.
boolean	performIncrementalProcessing(boolean isDirty, List<IncrementalModuleItem> sortedTops, List<IncrementalModuleItem> sortedBottoms, Rect localVisibleRect, Rect previousLocalVisibleRect)

Methods inherited from class java.lang.Object

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

Field Detail

sTopsComparators

public static final Comparator<IncrementalModuleItem> sTopsComparators

sBottomsComparator

public static final Comparator<IncrementalModuleItem> sBottomsComparator

Constructor Detail

IncrementalModule

public IncrementalModule(View view)

Method Detail

clearIncrementalItems

public void clearIncrementalItems()

Triggers exit range callbacks for all items which were inside the range, used for example when the LithoView is not visible anymore.

performIncrementalProcessing

public boolean performIncrementalProcessing(boolean isDirty,
                                            List<IncrementalModuleItem> sortedTops,
                                            List<IncrementalModuleItem> sortedBottoms,
                                            Rect localVisibleRect,
                                            Rect previousLocalVisibleRect)