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/*******************************************************************************
* Copyright (c) 2000, 2004 QNX Software Systems and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* QNX Software Systems - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.make.internal.ui.text.makefile;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.rules.IRule;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.IWhitespaceDetector;
import org.eclipse.jface.text.rules.IWordDetector;
import org.eclipse.jface.text.rules.PatternRule;
import org.eclipse.jface.text.rules.RuleBasedScanner;
import org.eclipse.jface.text.rules.Token;
import org.eclipse.jface.text.rules.WhitespaceRule;
import org.eclipse.jface.text.rules.WordRule;
public class MakefileMacroScanner extends RuleBasedScanner {
private String buffer;
private final static String[] DELIMITERS = { "\r", "\n", "\r\n" }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
public final static String tokenText = "text"; //$NON-NLS-1$
public final static String tokenMacro = "macro"; //$NON-NLS-1$
public final static String tokenOther = "other"; //$NON-NLS-1$
/**
* Constructor for MakefileMacroScanner
*/
public MakefileMacroScanner(String buffer) {
super();
this.buffer = buffer;
fOffset = 0;
IToken tText = new Token(tokenText);
IToken tMacro = new Token(tokenMacro);
IToken tOther = new Token(tokenOther);
List rules = new ArrayList();
rules.add(new PatternRule("\"", "\"", tText, '\\', true)); //$NON-NLS-1$ //$NON-NLS-2$
rules.add(new PatternRule("\'", "\'", tText, '\\', true)); //$NON-NLS-1$ //$NON-NLS-2$
rules.add(new MakefileSimpleMacroRule(tMacro));
// Add generic whitespace rule.
rules.add(new WhitespaceRule(new IWhitespaceDetector() {
public boolean isWhitespace(char character) {
return Character.isWhitespace(character);
}
}));
WordRule wRule = new WordRule(new IWordDetector() {
public boolean isWordPart(char c) {
return isWordStart(c);
}
public boolean isWordStart(char c) {
return !(((short) c == EOF) || Character.isSpaceChar(c));
}
}, tOther);
rules.add(wRule);
IRule[] result = new IRule[rules.size()];
rules.toArray(result);
setRules(result);
setRange(null, 0, buffer.length());
}
/**
* @see RuleBasedScanner#getColumn()
*/
public int getColumn() {
return fOffset;
}
/**
* @see RuleBasedScanner#read()
*/
public int read() {
int c;
if (fOffset == buffer.length())
c = EOF;
else
c = buffer.charAt(fOffset);
++fOffset;
return c;
}
/**
* @see RuleBasedScanner#setRange(IDocument, int, int)
*/
public void setRange(IDocument document, int offset, int length) {
fDocument = document;
fOffset = offset;
fRangeEnd = offset + length;
fDelimiters = new char[DELIMITERS.length][];
for (int i = 0; i < DELIMITERS.length; i++)
fDelimiters[i] = DELIMITERS[i].toCharArray();
}
}
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