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.ICharacterScanner; | |
import org.eclipse.jface.text.rules.IPredicateRule; | |
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.RuleBasedPartitionScanner; | |
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 RuleBasedPartitionScanner { | |
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 == '/'); | |
} | |
}; | |
/** | |
* | |
*/ | |
static class WordPredicateRule extends WordRule implements IPredicateRule { | |
private IToken fSuccessToken; | |
public WordPredicateRule(IToken successToken) { | |
super(new EmptyCommentDetector()); | |
fSuccessToken= successToken; | |
addWord("/**/", fSuccessToken); | |
} | |
/* | |
* @see org.eclipse.jface.text.rules.IPredicateRule#evaluate(ICharacterScanner, boolean) | |
*/ | |
public IToken evaluate(ICharacterScanner scanner, boolean resume) { | |
return super.evaluate(scanner); | |
} | |
/* | |
* @see org.eclipse.jface.text.rules.IPredicateRule#getSuccessToken() | |
*/ | |
public IToken getSuccessToken() { | |
return fSuccessToken; | |
} | |
}; | |
/** | |
* 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. | |
rules.add(new WordPredicateRule(comment)); | |
// Add rules for multi-line comments and javadoc. | |
rules.add(new MultiLineRule("/**", "*/", javaDoc)); //$NON-NLS-1$ //$NON-NLS-2$ | |
rules.add(new MultiLineRule("/*", "*/", comment)); //$NON-NLS-1$ //$NON-NLS-2$ | |
IPredicateRule[] result= new IPredicateRule[rules.size()]; | |
rules.toArray(result); | |
setPredicateRules(result); | |
} | |
} |