org.eclipse.ui.examples.javaeditor/Eclipse Java Editor Example/org/eclipse/ui/examples/javaeditor/javadoc/JavaDocScanner.java

package org.eclipse.ui.examples.javaeditor.javadoc;

/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */

import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.text.TextAttribute;
import org.eclipse.jface.text.rules.IRule;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.IWordDetector;
import org.eclipse.jface.text.rules.RuleBasedScanner;
import org.eclipse.jface.text.rules.SingleLineRule;
import org.eclipse.jface.text.rules.Token;
import org.eclipse.jface.text.rules.WhitespaceRule;
import org.eclipse.jface.text.rules.WordRule;
import org.eclipse.ui.examples.javaeditor.util.JavaColorProvider;
import org.eclipse.ui.examples.javaeditor.util.JavaWhitespaceDetector;

/**
 * A rule based JavaDoc scanner.
 */
public class JavaDocScanner extends RuleBasedScanner {

	/**
	 * A key word detector.
	 */
	static class JavaDocWordDetector implements IWordDetector {

	/* (non-Javadoc)
	 * Method declared on IWordDetector
	 */
		public boolean isWordStart(char c) {
			return (c == '@');
		}

		/* (non-Javadoc)
	 	* Method declared on IWordDetector
	 	*/
		public boolean isWordPart(char c) {
			return Character.isLetter(c);
		}
	};

	private static String[] fgKeywords= { "@author", "@deprecated", "@exception", "@param", "@return", "@see", "@serial", "@serialData", "@serialField", "@since", "@throws", "@version" }; //$NON-NLS-12$ //$NON-NLS-11$ //$NON-NLS-10$ //$NON-NLS-7$ //$NON-NLS-9$ //$NON-NLS-8$ //$NON-NLS-6$ //$NON-NLS-5$ //$NON-NLS-4$ //$NON-NLS-3$ //$NON-NLS-2$ //$NON-NLS-1$

	/**
	 * Create a new java doc scanner.
	 */
	 public JavaDocScanner(JavaColorProvider provider) {
		super();

		IToken keyword= new Token(new TextAttribute(provider.getColor(JavaColorProvider.JAVADOC_KEYWORD)));
		IToken tag= new Token(new TextAttribute(provider.getColor(JavaColorProvider.JAVADOC_TAG)));
		IToken link= new Token(new TextAttribute(provider.getColor(JavaColorProvider.JAVADOC_LINK)));

		List list= new ArrayList();

		// Add rule for tags.
		list.add(new SingleLineRule("<", ">", tag)); //$NON-NLS-2$ //$NON-NLS-1$

		// Add rule for links.
		list.add(new SingleLineRule("{", "}", link)); //$NON-NLS-2$ //$NON-NLS-1$

		// Add generic whitespace rule.
		list.add(new WhitespaceRule(new JavaWhitespaceDetector()));

		// Add word rule for keywords.
		WordRule wordRule= new WordRule(new JavaDocWordDetector());
		for (int i= 0; i < fgKeywords.length; i++)
			wordRule.addWord(fgKeywords[i], keyword);
		list.add(wordRule);

		IRule[] result= new IRule[list.size()];
		list.toArray(result);
		setRules(result);
	}
}