/*******************************************************************************
* Copyright (c) 2007, 2009 Wind River Systems, Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Anton Leherbauer (Wind River Systems) - initial API and implementation
* Andrew Ferguson (Symbian)
*******************************************************************************/
package org.eclipse.cdt.internal.ui.text;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.text.rules.IRule;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.PatternRule;
import org.eclipse.jface.text.rules.WordRule;
import org.eclipse.cdt.core.model.ICLanguageKeywords;
import org.eclipse.cdt.ui.text.AbstractCScanner;
import org.eclipse.cdt.ui.text.ICColorConstants;
import org.eclipse.cdt.ui.text.ITokenStoreFactory;
import org.eclipse.cdt.internal.ui.text.util.CWordDetector;
/**
* A scanner for preprocessor directives.
*
* @since 4.0
*/
public class CPreprocessorScanner extends AbstractCScanner {
/** Properties for tokens. */
private static String[] fgTokenProperties= {
ICColorConstants.C_KEYWORD,
ICColorConstants.PP_DIRECTIVE,
ICColorConstants.PP_DEFAULT,
ICColorConstants.C_TYPE,
ICColorConstants.C_STRING,
ICColorConstants.PP_HEADER
};
private ICLanguageKeywords fKeywords;
/**
* Creates a C/C++ preprocessor scanner.
* @param keywords the keywords defined by the language dialect
*/
public CPreprocessorScanner(ITokenStoreFactory factory, ICLanguageKeywords keywords) {
super(factory.createTokenStore(fgTokenProperties));
fKeywords= keywords;
setRules(createRules());
}
/*
* @see org.eclipse.cdt.internal.ui.text.AbstractCScanner#createRules()
*/
protected List<IRule> createRules() {
IToken defaultToken= getToken(ICColorConstants.PP_DEFAULT);
List<IRule> rules= new ArrayList<IRule>();
IToken token;
// Add generic white space rule.
rules.add(new CWhitespaceRule(defaultToken));
token= getToken(ICColorConstants.PP_DIRECTIVE);
PreprocessorRule preprocessorRule = new PreprocessorRule(new CWordDetector(), defaultToken);
String[] ppKeywords= fKeywords.getPreprocessorKeywords();
for (int i = 0; i < ppKeywords.length; i++) {
preprocessorRule.addWord(ppKeywords[i], token);
}
// add ## operator
preprocessorRule.addWord("##", token); //$NON-NLS-1$
rules.add(preprocessorRule);
// Add word rule for keywords, types, and constants.
WordRule wordRule= new WordRule(new CWordDetector(), defaultToken);
token= getToken(ICColorConstants.C_KEYWORD);
String[] keywords= fKeywords.getKeywords();
for (int i = 0; i < keywords.length; i++) {
wordRule.addWord(keywords[i], token);
}
token= getToken(ICColorConstants.C_TYPE);
String[] types= fKeywords.getBuiltinTypes();
for (int i = 0; i < types.length; i++) {
wordRule.addWord(types[i], token);
}
rules.add(wordRule);
token = getToken(ICColorConstants.PP_HEADER);
CHeaderRule headerRule = new CHeaderRule(token);
rules.add(headerRule);
token = getToken(ICColorConstants.C_STRING);
IRule stringRule = new PatternRule("\"", "\"", token, '\\', true, true, true); //$NON-NLS-1$ //$NON-NLS-2$
rules.add(stringRule);
token = getToken(ICColorConstants.C_STRING);
IRule charRule = new PatternRule("'", "'", token, '\\', true, true, true); //$NON-NLS-1$ //$NON-NLS-2$
rules.add(charRule);
setDefaultReturnToken(defaultToken);
return rules;
}
}