public void Draw(TextView textView, DrawingContext drawingContext)
{
if (!markers.Any() || !textView.VisualLinesValid)
{
return;
}
var visualLines = textView.VisualLines;
if (visualLines.Count == 0)
{
return;
}
int viewStart = visualLines.First().FirstDocumentLine.Offset;
int viewEnd = visualLines.Last().LastDocumentLine.EndOffset;
foreach (ErrorTextMarker marker in markers.FindOverlappingSegments(viewStart, viewEnd - viewStart))
{
foreach (Rect rect in BackgroundGeometryBuilder.GetRectsForSegment(textView, marker))
{
Point startPoint = rect.BottomLeft;
Point endPoint = rect.BottomRight;
var pen = new Pen(new SolidColorBrush(marker.MarkerColor), 1);
pen.Freeze();
const double offset = 2.5;
int count = Math.Max((int)((endPoint.X - startPoint.X) / offset) + 1, 4);
var geometry = new StreamGeometry();
using (StreamGeometryContext ctx = geometry.Open())
{
ctx.BeginFigure(startPoint, false, false);
ctx.PolyLineTo(CreatePoints(startPoint, offset, count).ToArray(), true, false);
}
geometry.Freeze();
drawingContext.DrawGeometry(Brushes.Transparent, pen, geometry);
break;
}
}
}
