TextBoundary class Null safety

An interface for retrieving the logical text boundary (left-closed-right-open) at a given location in a document.

The input TextPosition points to a position between 2 code units (which can be visually represented by the caret if the selection were to collapse to that position). The TextPosition.affinity is used to determine which code unit it points. For example, TextPosition(i, upstream) points to code unit i - 1 and TextPosition(i, downstream) points to code unit i.

Implementers

Constructors

TextBoundary()
A constant constructor to enable subclass override.
const

Properties

hashCode int
The hash code for this object.
read-onlyinherited
runtimeType Type
A representation of the runtime type of the object.
read-onlyinherited

Methods

getLeadingTextBoundaryAt(TextPosition position) TextPosition
Returns the leading text boundary at the given location.
getTextBoundaryAt(TextPosition position) TextRange
Gets the text boundary range that encloses the input position.
getTrailingTextBoundaryAt(TextPosition position) TextPosition
Returns the trailing text boundary at the given location, exclusive.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
toString() String
A string representation of this object.
inherited

Operators

operator +(TextBoundary other) TextBoundary
Gets the boundary by calling the left-hand side and pipe the result to right-hand side.
operator ==(Object other) bool
The equality operator.
inherited