InlineSpan class abstract

An immutable span of inline content which forms part of a paragraph.

This example shows a tree of InlineSpans that make a query asking for a name with a TextField embedded inline.
    text: 'My name is ',
    style: const TextStyle(color:,
    children: <InlineSpan>[
        alignment: PlaceholderAlignment.baseline,
        baseline: TextBaseline.alphabetic,
        child: ConstrainedBox(
          constraints: const BoxConstraints(maxWidth: 100),
          child: const TextField(),
      const TextSpan(
        text: '.',

See also:



InlineSpan({TextStyle? style})
Creates an InlineSpan with the given values.


hashCode int
The hash code for this object.
no setteroverride
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
style TextStyle?
The TextStyle to apply to this span.


build(ParagraphBuilder builder, {TextScaler textScaler = TextScaler.noScaling, List<PlaceholderDimensions>? dimensions}) → void
Apply the properties of this object to the given ParagraphBuilder, from which a Paragraph can be obtained.
codeUnitAt(int index) int?
Returns the UTF-16 code unit at the given index in the flattened string.
codeUnitAtVisitor(int index, Accumulator offset) int?
Performs the check at each InlineSpan for if the index falls within the range of the span and returns the corresponding code unit. Returns null otherwise.
compareTo(InlineSpan other) RenderComparison
Describe the difference between this span and another, in terms of how much damage it will make to the rendering. The comparison is deep.
computeSemanticsInformation(List<InlineSpanSemanticsInformation> collector) → void
Walks the InlineSpan tree and accumulates a list of InlineSpanSemanticsInformation objects.
computeToPlainText(StringBuffer buffer, {bool includeSemanticsLabels = true, bool includePlaceholders = true}) → void
Walks the InlineSpan tree and writes the plain text representation to buffer.
debugAssertIsValid() bool
In debug mode, throws an exception if the object is not in a valid configuration. Otherwise, returns true.
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
getSemanticsInformation() List<InlineSpanSemanticsInformation>
Flattens the InlineSpan tree to a list of InlineSpanSemanticsInformation objects.
getSpanForPosition(TextPosition position) InlineSpan?
Returns the InlineSpan that contains the given position in the text.
getSpanForPositionVisitor(TextPosition position, Accumulator offset) InlineSpan?
Performs the check at each InlineSpan for if the position falls within the range of the span and returns the span if it does.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
toPlainText({bool includeSemanticsLabels = true, bool includePlaceholders = true}) String
Flattens the InlineSpan tree into a single string.
toString({DiagnosticLevel minLevel =}) String
A string representation of this object.
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants.
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object.
toStringShort() String
A brief description of this object, usually just the runtimeType and the hashCode.
visitChildren(InlineSpanVisitor visitor) bool
Walks this InlineSpan and any descendants in pre-order and calls visitor for each span that has content.
visitDirectChildren(InlineSpanVisitor visitor) bool
Calls visitor for each immediate child of this InlineSpan.


operator ==(Object other) bool
The equality operator.