SimpleSegment GetTextLineSegment(MouseEventArgs e)
{
Point pos = e.GetPosition(TextView);
pos.X = 0;
pos.Y += TextView.VerticalOffset;
VisualLine vl = TextView.GetVisualLineFromVisualTop(pos.Y);
if (vl == null)
{
return(SimpleSegment.Invalid);
}
TextLine tl = vl.GetTextLineByVisualYPosition(pos.Y);
int visualStartColumn = vl.GetTextLineVisualStartColumn(tl);
int visualEndColumn = visualStartColumn + tl.Length;
int relStart = vl.FirstDocumentLine.Offset;
int startOffset = vl.GetRelativeOffset(visualStartColumn) + relStart;
int endOffset = vl.GetRelativeOffset(visualEndColumn) + relStart;
if (endOffset == vl.LastDocumentLine.Offset + vl.LastDocumentLine.Length)
{
endOffset += vl.LastDocumentLine.DelimiterLength;
}
return(new SimpleSegment(startOffset, endOffset - startOffset));
}
static void SetCaretPosition(TextArea textArea, VisualLine targetVisualLine, TextLine targetLine,
CharacterHit ch, bool allowWrapToNextLine)
{
int newVisualColumn = ch.FirstCharacterIndex + ch.TrailingLength;
int targetLineStartCol = targetVisualLine.GetTextLineVisualStartColumn(targetLine);
if (!allowWrapToNextLine && newVisualColumn >= targetLineStartCol + targetLine.Length)
{
newVisualColumn = targetLineStartCol + targetLine.Length - 1;
}
int newOffset = targetVisualLine.GetRelativeOffset(newVisualColumn) + targetVisualLine.FirstDocumentLine.Offset;
SetCaretPosition(textArea, newVisualColumn, newOffset);
}