Alsing.Windows.Forms.SyntaxBox.Painter.NativePainter.RenderCollapsedSelection C# (CSharp) Method

        private void RenderCollapsedSelection(int RowIndex)
        {
            Row xtr = Control.Document[RowIndex];
            if ((RowIndex > Control.Selection.LogicalBounds.FirstRow) && (RowIndex < Control.Selection.LogicalBounds.LastRow))
            {
                int width = MeasureRow(xtr, xtr.Expansion_EndChar).Width;
                RenderBox(Control.View.TextMargin, 0, Math.Max(width - Control.View.ClientAreaStart, 0), Control.View.RowHeight);
            }
            else if ((RowIndex == Control.Selection.LogicalBounds.FirstRow) && (RowIndex == Control.Selection.LogicalBounds.LastRow))
            {
                int start = MeasureRow(xtr, Math.Min(xtr.Text.Length, Control.Selection.LogicalBounds.FirstColumn)).Width;
                int min = Math.Min(xtr.Text.Length, Control.Selection.LogicalBounds.LastColumn);
                min = Math.Min(min, xtr.Expansion_EndChar);
                int width = MeasureRow(xtr, min).Width - start;
                RenderBox(Control.View.TextMargin + start - Control.View.ClientAreaStart, 0, width, Control.View.RowHeight);
            }
            else if (RowIndex == Control.Selection.LogicalBounds.LastRow)
            {
                int width = MeasureRow(xtr, Math.Min(xtr.Text.Length, Control.Selection.LogicalBounds.LastColumn)).Width;
                RenderBox(Control.View.TextMargin, 0, Math.Max(width - Control.View.ClientAreaStart, 0), Control.View.RowHeight);
            }
            else if (RowIndex == Control.Selection.LogicalBounds.FirstRow)
            {
                int start = MeasureRow(xtr, Math.Min(xtr.Text.Length, Control.Selection.LogicalBounds.FirstColumn)).Width;
                int width = MeasureRow(xtr, Math.Min(xtr.Text.Length, xtr.Expansion_EndChar)).Width - start;
                RenderBox(Control.View.TextMargin + start - Control.View.ClientAreaStart, 0, width, Control.View.RowHeight);
            }

            if (Control.Selection.LogicalBounds.LastRow > RowIndex && Control.Selection.LogicalBounds.FirstRow <= RowIndex)
            {
                int start = xtr.Expansion_PixelEnd;
                int end = xtr.Expansion_EndRow.Expansion_PixelStart - start + Control.View.TextMargin;
                //start+=100;
                //end=200;
                RenderBox(start - Control.View.ClientAreaStart, 0, end, Control.View.RowHeight);
            }

            RowIndex = xtr.Expansion_EndRow.Index;
            xtr = xtr.Expansion_EndRow;

            if (Control.Selection.LogicalBounds.FirstRow <= RowIndex && Control.Selection.LogicalBounds.LastRow >= RowIndex)
            {
                int endchar = Control.Selection.LogicalBounds.LastRow != RowIndex ? xtr.Text.Length : Math.Min(Control.Selection.LogicalBounds.LastColumn, xtr.Text.Length);

                int end = MeasureRow(xtr, endchar).Width;
                end += xtr.Expansion_PixelStart;
                end -= MeasureRow(xtr, xtr.Expansion_StartChar).Width;

                int start;

                if (Control.Selection.LogicalBounds.FirstRow == RowIndex)
                {
                    int startchar = Math.Max(Control.Selection.LogicalBounds.FirstColumn, xtr.Expansion_StartChar);
                    start = MeasureRow(xtr, startchar).Width;
                    start += xtr.Expansion_PixelStart;
                    start -= MeasureRow(xtr, xtr.Expansion_StartChar).Width;
                }
                else
                {
                    start = MeasureRow(xtr, xtr.Expansion_StartChar).Width;
                    start += xtr.Expansion_PixelStart;
                    start -= MeasureRow(xtr, xtr.Expansion_StartChar).Width;
                }

                end -= start;

                if (Control.Selection.LogicalBounds.LastRow != RowIndex)
                    end += 6;


                RenderBox(Control.View.TextMargin + start - Control.View.ClientAreaStart, 0, end, Control.View.RowHeight);
            }
        }