protected override int?codeUnitAtVisitor(int index, Accumulator offset)
{
if (text == null)
{
return(null);
}
if (index - offset.value < text.Length)
{
return(text[index - offset.value]);
}
offset.increment(text.Length);
return(null);
}
protected override InlineSpan getSpanForPositionVisitor(TextPosition position, Accumulator offset)
{
if (text == null)
{
return(null);
}
TextAffinity affinity = position.affinity;
int targetOffset = position.offset;
int endOffset = offset.value + text.Length;
if (offset.value == targetOffset && affinity == TextAffinity.downstream ||
offset.value < targetOffset && targetOffset < endOffset ||
endOffset == targetOffset && affinity == TextAffinity.upstream)
{
return(this);
}
offset.increment(text.Length);
return(null);
}