Alsing.Windows.Forms.SyntaxBox.EditViewControl.OnMouseUp C# (CSharp) Method

        protected override void OnMouseUp(MouseEventArgs e)
        {
            MouseX = e.X;
            MouseY = e.Y;

            TextPoint pos = Painter.CharFromPixel(e.X, e.Y);
            Row row = null;
            if (pos.Y >= 0 && pos.Y < Document.Count)
                row = Document[pos.Y];

            #region RowEvent

            var rea = new RowMouseEventArgs {Row = row, Button = e.Button, MouseX = MouseX, MouseY = MouseY};
            if (e.X >= View.TextMargin - 7)
            {
                rea.Area = RowArea.TextArea;
            }
            else if (e.X < View.GutterMarginWidth)
            {
                rea.Area = RowArea.GutterArea;
            }
            else if (e.X < View.LineNumberMarginWidth +
                           View.GutterMarginWidth)
            {
                rea.Area = RowArea.LineNumberArea;
            }
            else if (e.X < View.TextMargin - 7)
            {
                rea.Area = RowArea.FoldingArea;
            }

            OnRowMouseUp(rea);

            #endregion

            if (View.Action == EditAction.None)
            {
                if (e.X > View.TotalMarginWidth)
                {
                    if (IsOverSelection(e.X, e.Y) && e.Button == MouseButtons.Left)
                    {
                        View.Action = EditAction.SelectText;
                        Caret.SetPos(Painter.CharFromPixel(e.X, e.Y));
                        Selection.ClearSelection();
                        Redraw();
                    }
                }
            }

            View.Action = EditAction.None;
            base.OnMouseUp(e);
        }