ICSharpCode.TextEditor.TextArea.OnPaint C# (CSharp) Method

		protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
		{
			int currentXPos = 0;
			int currentYPos = 0;
			bool adjustScrollBars = false;
			Graphics  g             = e.Graphics;
			Rectangle clipRectangle = e.ClipRectangle;
			
			bool isFullRepaint = clipRectangle.X == 0 && clipRectangle.Y == 0
				&& clipRectangle.Width == this.Width && clipRectangle.Height == this.Height;
			
			g.TextRenderingHint = this.TextEditorProperties.TextRenderingHint;
			
			if (updateMargin != null) {
				updateMargin.Paint(g, updateMargin.DrawingPosition);
//				clipRectangle.Intersect(updateMargin.DrawingPosition);
			}
			
			if (clipRectangle.Width <= 0 || clipRectangle.Height <= 0) {
				return;
			}
			
			foreach (AbstractMargin margin in leftMargins) {
				if (margin.IsVisible) {
					Rectangle marginRectangle = new Rectangle(currentXPos , currentYPos, margin.Size.Width, Height - currentYPos);
					if (marginRectangle != margin.DrawingPosition) {
						// margin changed size
						if (!isFullRepaint && !clipRectangle.Contains(marginRectangle)) {
							Invalidate(); // do a full repaint
						}
						adjustScrollBars = true;
						margin.DrawingPosition = marginRectangle;
					}
					currentXPos += margin.DrawingPosition.Width;
					if (clipRectangle.IntersectsWith(marginRectangle)) {
						marginRectangle.Intersect(clipRectangle);
						if (!marginRectangle.IsEmpty) {
							margin.Paint(g, marginRectangle);
						}
					}
				}
			}
			
			Rectangle textViewArea = new Rectangle(currentXPos, currentYPos, Width - currentXPos, Height - currentYPos);
			if (textViewArea != textView.DrawingPosition) {
				adjustScrollBars = true;
				textView.DrawingPosition = textViewArea;
				// update caret position (but outside of WM_PAINT!)
				BeginInvoke((MethodInvoker)caret.UpdateCaretPosition);
			}
			if (clipRectangle.IntersectsWith(textViewArea)) {
				textViewArea.Intersect(clipRectangle);
				if (!textViewArea.IsEmpty) {
					textView.Paint(g, textViewArea);
				}
			}
			
			if (adjustScrollBars) {
				this.motherTextAreaControl.AdjustScrollBars();
			}
			
			// we cannot update the caret position here, it's not allowed to call the caret API inside WM_PAINT
			//Caret.UpdateCaretPosition();
			
			base.OnPaint(e);
		}
		void DocumentFoldingsChanged(object sender, EventArgs e)