Class PositionMap

Namespace

TextEdit.Core

Assembly

TextEdit.Core.dll

Maps exact UTF-16 positions through a validated sequence of replacements.

public sealed class PositionMap

Inheritance

object

PositionMap

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Constructors

PositionMap(int, IEnumerable<PositionChange>)

Creates a map from sequential replacement coordinates.

public PositionMap(int oldLength, IEnumerable<PositionChange> changes)

Parameters

oldLength int

changes IEnumerable<PositionChange>

Properties

Changes

Gets sequential replacement geometry.

public ImmutableArray<PositionChange> Changes { get; }

Property Value

ImmutableArray<PositionChange>

NewLength

Gets source length after the last replacement.

public int NewLength { get; }

Property Value

int

OldLength

Gets source length before the first replacement.

public int OldLength { get; }

Property Value

int

Methods

Invert()

Creates the inverse geometry in reverse operation order. Deleted interior positions cannot be reconstructed from coordinates alone.

public PositionMap Invert()

Returns

PositionMap

Map(int, PositionAffinity, bool)

Maps an endpoint. Positions in replaced source collapse according to affinity, or return null when invalidation is requested.

public int? Map(int position, PositionAffinity affinity = PositionAffinity.AfterInsertion, bool invalidateOnDeletion = false)

Parameters

position int

affinity PositionAffinity

invalidateOnDeletion bool

Returns

int?

Map(TextSelectionSet)

Maps directional selections while retaining identities and primary ownership.

public TextSelectionSet Map(TextSelectionSet selections)

Parameters

selections TextSelectionSet

Returns

TextSelectionSet

Map(TextSpan, PositionAffinity, PositionAffinity, bool)

Maps a range with independent endpoint affinities. Optional invalidation detects deletion of any covered source.

public TextSpan? Map(TextSpan range, PositionAffinity startAffinity = PositionAffinity.AfterInsertion, PositionAffinity endAffinity = PositionAffinity.BeforeInsertion, bool invalidateOnDeletion = false)

Parameters

range TextSpan

startAffinity PositionAffinity

endAffinity PositionAffinity

invalidateOnDeletion bool

Returns

TextSpan?

Then(PositionMap)

Appends a subsequent map whose input length matches this map's output.

public PositionMap Then(PositionMap next)

Parameters

next PositionMap

Returns

PositionMap