javaexceptiontokenmaker.java

具有不同语法高亮的编辑器实例

/*
 * 03/22/2005
 *
 * JavaExceptionTokenMaker.java - Parses input and translates it into tokens
 * representing a Java exception stack trace.
 * Copyright (C) 2005 Robert Futrell
 * [e-mail]
 * www.website.com
 *
 * 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.fife.rtext;

import java.util.regex.*;
import javax.swing.text.Segment;

import org.fife.ui.rsyntaxtextarea.Token;
import org.fife.ui.rsyntaxtextarea.TokenMap;
import org.fife.ui.rsyntaxtextarea.custom.*;


/**
 * Token maker for Java exceptions.  This scheme is used by RText's custom
 * Exception dialog to make it a little more pretty.<p>
 *
 * Note that we only use this syntax highlighting when we're certain that the
 * JVM in which we're running is a Sun JVM, as we're only positive of the
 * stack trace format in this case (it's not specified in any JVM spec).
 *
 * @author Robert Futrell
 * @version 0.1
 */
public class JavaExceptionTokenMaker extends AbstractRegExTokenMaker {

	private RuleSet ruleSet;


/*****************************************************************************/


	public JavaExceptionTokenMaker() {
		ruleSet = createRuleSet();
	}


/*****************************************************************************/


	private final RuleSet createRuleSet() {

		Rule[] rules = new Rule[7];

		// Exception/error rule.
		String p = "[\\w\\.\\\\$]+\\..*(Exception|Error|Throwable)";
		rules[0] = new Rule(p, Token.COMMENT_EOL, true);

		// Method descriptor rule.
		p = "([\\w\\\\$]+[\\.])+[\\w\\\\$]+";
		rules[1] = new Rule(p, Token.RESERVED_WORD, true);

		// Operator rule.
		p = "[:]";
		rules[2] = new Rule(p, Token.OPERATOR, true);

		// Identifier rule (should catch words not exception-specific).
		p = "[\\w\\\\$;,]+";
		rules[3] = new Rule(p, Token.IDENTIFIER, true);

		// Line number/Unknown Source/Native method rule.
		p = "\\([^\\)\\n]*\\)";
		rules[4] = new Rule(p, Token.LITERAL_STRING_DOUBLE_QUOTE, true);

		// Whitespace rule.
		p = "\\s+";
		rules[5] = new Rule(p, Token.WHITESPACE, true);

		// Catchall rule in case we missed something or some implementation
		// does a different format for stack traces.
		p = ".";
		rules[6] = new Rule(p, Token.ERROR_IDENTIFIER, true);

		TokenMap wordsToHighlight = getWordsToHighlight();

		return new RuleSet(rules, wordsToHighlight);

	}


/*****************************************************************************/


	protected RuleSet getRuleSet(int state) {
		return ruleSet;
	}


/*****************************************************************************/


	/**
	 * Returns the words to highlight (which is empty).
	 *
	 * @return A <code>TokenMap</code> containing the words to highlight.
	 */
	public TokenMap getWordsToHighlight() {
		return new TokenMap();//null;
	}


/*****************************************************************************/

}