SyntaxUtilities.java

/*
 * SyntaxUtilities.java - Utility functions
 * :tabSize=4:indentSize=4:noTabs=false:
 * :folding=explicit:collapseFolds=1:
 *
 * Copyright (C) 2003 Slava Pestov
 *
 * 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 2
 * of the License, or 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.gjt.sp.jedit.syntax;

import javax.swing.text.Segment;

/**
 * Contains utility functions used by the syntax highlighting code.
 * @since jEdit 4.2pre1
 * @version $Id$
 * @author Slava Pestov
 */
public class SyntaxUtilities
{
	//{{{ regionMatches() method
	/**
	 * Checks if a subregion of a <code>Segment</code> is equal to a
	 * character array.
	 * @param ignoreCase True if case should be ignored, false otherwise
	 * @param text The segment
	 * @param offset The offset into the segment
	 * @param match The character array to match
	 * @return true if the subregion of the segment was
	 * equals to the character array
	 * @since jEdit 4.2pre1
	 */
	public static boolean regionMatches(boolean ignoreCase, Segment text,
		int offset, char[] match)
	{
		int length = offset + match.length;
		if(length > text.offset + text.count)
			return false;
		char[] textArray = text.array;
		for(int i = offset, j = 0; i < length; i++, j++)
		{
			char c1 = textArray[i];
			char c2 = match[j];
			if(ignoreCase)
			{
				c1 = Character.toUpperCase(c1);
				c2 = Character.toUpperCase(c2);
			}
			if(c1 != c2)
				return false;
		}
		return true;
	} //}}}
}