content: package com.japisoft.xmlpad.editor.renderer;
  
  import java.awt.Color;
  import java.awt.Graphics;
  import java.awt.Rectangle;
  import java.awt.Shape;
  
  import javax.swing.text.BadLocationException;
  import javax.swing.text.JTextComponent;
  import javax.swing.text.Highlighter.HighlightPainter;
  
  /**
  This program is available under two licenses : 
  
  1. For non commercial usage : 
  
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  2. For commercial usage :
  
  You need to get a commercial license for source usage at : 
  
  http://www.editix.com/buy.html
  
  Copyright (c) 2018 Alexandre Brillant - JAPISOFT SARL - http://www.japisoft.com
  
  @author Alexandre Brillant - abrillant@japisoft.com
  @author JAPISOFT SARL - http://www.japisoft.com
  
  */
  public class ExpressionUnderlineHighlighter implements HighlightPainter {
  
  	private Color color;
  	
  	public ExpressionUnderlineHighlighter( 
  			Color color  ) {
  		this.color = color;
  	}
  
  	public void paint(Graphics g, int p0, int p1, Shape bounds, JTextComponent c) {
  		try {
  			Rectangle r0 = c.modelToView( p0 );
  			Rectangle r1 = c.modelToView( p1 );
  			g.setColor( color );
  			g.drawLine( 
  				r0.x, 
  				r0.y + r0.height, 
  				r1.x, 
  				r0.y + r0.height 
  			);
  		} catch( BadLocationException exc ) {			
  		}		
  	}	
  
  }
  