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package org.eclipse.ui.examples.javaeditor.java;
/*
* (c) Copyright IBM Corp. 2000, 2001.
* All Rights Reserved.
*/
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.text.rules.EndOfLineRule;
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.MultiLineRule;
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.WordRule;
/**
* This scanner recognizes the JavaDoc comments and Java multi line comments.
*/
public class JavaPartitionScanner extends RuleBasedScanner {
private final static String SKIP= "__skip"; //$NON-NLS-1$
public final static String JAVA_MULTILINE_COMMENT= "__java_multiline_comment"; //$NON-NLS-1$
public final static String JAVA_DOC= "__java_javadoc"; //$NON-NLS-1$
/**
* Detector for empty comments.
*/
static class EmptyCommentDetector 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 (c == '*' || c == '/');
}
};
/**
* Creates the partitioner and sets up the appropriate rules.
*/
public JavaPartitionScanner() {
super();
IToken javaDoc= new Token(JAVA_DOC);
IToken comment= new Token(JAVA_MULTILINE_COMMENT);
List rules= new ArrayList();
// Add rule for single line comments.
rules.add(new EndOfLineRule("//", Token.UNDEFINED)); //$NON-NLS-1$
// Add rule for strings and character constants.
rules.add(new SingleLineRule("\"", "\"", Token.UNDEFINED, '\\')); //$NON-NLS-2$ //$NON-NLS-1$
rules.add(new SingleLineRule("'", "'", Token.UNDEFINED, '\\')); //$NON-NLS-2$ //$NON-NLS-1$
// Add special case word rule.
WordRule wordRule= new WordRule(new EmptyCommentDetector());
wordRule.addWord("/**/", comment); //$NON-NLS-1$
rules.add(wordRule);
// Add rules for multi-line comments and javadoc.
rules.add(new MultiLineRule("/**", "*/", javaDoc)); //$NON-NLS-1$ //$NON-NLS-2$
rules.add(new MultiLineRule("/*", "*/", comment)); //$NON-NLS-1$ //$NON-NLS-2$
IRule[] result= new IRule[rules.size()];
rules.toArray(result);
setRules(result);
}
}
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