/*
 * [BWTokenPanel.java]
 *
 * Summary: Renders a string of tokens, usually representing Java source code.
 *
 * Copyright: (c) 2004-2017 Roedy Green, Canadian Mind Products, http://mindprod.com
 *
 * Licence: This software may be copied and used freely for any purpose but military.
 *          http://mindprod.com/contact/nonmil.html
 *
 * Requires: JDK 1.8+
 *
 * Created with: JetBrains IntelliJ IDEA IDE http://www.jetbrains.com/idea/
 *
 * Version History:
 *  4.0 2009-04-12 shorter style names, improved highlighting.
 */
package com.mindprod.jdisplay;

import com.mindprod.jtokens.NL;
import com.mindprod.jtokens.Token;

import javax.swing.JTextArea;

/**
 * Renders a string of tokens, usually representing Java source code.
 *
 * @author Roedy Green, Canadian Mind Products
 * @version 4.0 2009-04-12 shorter style names, improved highlighting.
 * @since 2004
 */
public final class BWTokenPanel extends JTextArea
    {
    /**
     * version number of this class
     */
    static final long serialVersionUID = 1L;

    /**
     * accepts an array of tokens to display in plain black and white on an AWT TextArea, that support copy/paste, but
     * nothing fancy in fonts, colours etc.
     *
     * @param tokens array of Tokens to display.
     */
    public void setTokens( Token[] tokens )
        {
        // render all the tokens, some may be offscreen, but no matter.
        StringBuilder sb = new StringBuilder( tokens.length * 15 );
        for ( Token t : tokens )
            {
            if ( t instanceof NL )
                {
                // remove excess blank lines.
                int nls = Math.min( ( ( NL ) t ).getCount(), 2 );
                for ( int j = 0; j < nls; j++ )
                    {
                    sb.append( '\n' );
                    }
                }
            else
                {
                // colour and font are immaterial
                sb.append( t.getText() );
                }
            }
        this.setText( sb.toString() );
        // will trigger a repaint.
        }
    }