public override TextRun GetTextRun(int textSourceCharacterIndex)
{
var linePart = linePartsCollection.GetLinePartFromColumn(textSourceCharacterIndex, ref linePartIndex);
if (linePart == null)
{
return(endOfLine);
}
var part = linePart.Value;
if (part.AdornmentElement != null)
{
return(new AdornmentTextRun(part));
}
else
{
int offs = textSourceCharacterIndex - part.Column;
int length = part.ColumnLength - offs;
Debug.Assert(length >= 0);
if (length > maxLengthLeft)
{
length = maxLengthLeft;
}
if (length == 0)
{
return(endOfLine);
}
maxLengthLeft -= length;
return(new TextCharacters(text, part.Span.Start + offs, length, part.TextRunProperties));
}
}
public override TextRun GetTextRun(int textSourceCharacterIndex)
{
var linePart = linePartsCollection.GetLinePartFromColumn(textSourceCharacterIndex, ref linePartIndex);
if (linePart is null)
{
return(endOfLine);
}
var part = linePart.Value;
if (!(part.AdornmentElement is null))
{
return(new AdornmentTextRun(part));
}
int GetLastColumn(int position)
{
int column = FilterColumn(linePartsCollection.ConvertLinePositionToColumn(position));
var part = linePartsCollection.GetLinePartFromColumn(column);
if (!(part is null))
{
var lineParts = linePartsCollection.LineParts;
int lineIndex = position - linePartsCollection.Span.Start;
for (int i = part.Value.Index + 1; i < lineParts.Count; i++, column++)
{
var part2 = lineParts[i];
if (!part2.BelongsTo(lineIndex))
{
break;
}
}
}
return(FilterColumn(column));
}