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/*******************************************************************************
* Copyright (c) 2013, 2013 Andrew Gvozdev 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:
* Andrew Gvozdev - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.make.internal.ui.text.makefile;
import org.eclipse.jface.text.rules.ICharacterScanner;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.IWordDetector;
import org.eclipse.jface.text.rules.Token;
import org.eclipse.jface.text.rules.WordRule;
public class FunctionReferenceRule extends WordRule {
/** Buffer used for pattern detection. */
private StringBuffer fBuffer= new StringBuffer();
@SuppressWarnings("nls")
private final static String[] functions = {
"subst", "patsubst", "strip", "findstring",
"filter", "filter-out", "sort",
"word", "words", "wordlist", "firstword", "lastword",
"dir", "notdir",
"suffix", "basename", "addsuffix", "addprefix",
"join", "wildcard", "realpath", "abspath",
"if", "or", "and", "foreach",
"call", "value", "eval", "origin", "flavor",
"shell", "error", "warning", "info",
};
static class TagDetector implements IWordDetector {
private boolean isClosedBracket = false;
private int bracketNesting = 0;
@Override
public boolean isWordStart(char c) {
isClosedBracket = c == ')';
return isClosedBracket || c == '$';
}
@Override
public boolean isWordPart(char c) {
return !isClosedBracket && (c == '$' || c == '(' || Character.isJavaIdentifierPart(c) || c == '-');
}
}
public FunctionReferenceRule(IToken token) {
super(new TagDetector());
for (String f : functions) {
addWord("$(" + f, token); //$NON-NLS-1$
addWord("$$(" + f, token); //$NON-NLS-1$
}
addWord(")", token); //$NON-NLS-1$
}
@Override
public IToken evaluate(ICharacterScanner scanner) {
int c= scanner.read();
if (c == ')') {
if (((TagDetector)fDetector).bracketNesting > 0) {
((TagDetector)fDetector).bracketNesting--;
return (IToken)fWords.get(")"); //$NON-NLS-1$
}
return fDefaultToken;
}
if (c != ICharacterScanner.EOF && fDetector.isWordStart((char) c)) {
if (fColumn == UNDEFINED || (fColumn == scanner.getColumn() - 1)) {
fBuffer.setLength(0);
do {
fBuffer.append((char) c);
c= scanner.read();
} while (c != ICharacterScanner.EOF && fDetector.isWordPart((char) c));
scanner.unread();
String buffer= fBuffer.toString();
IToken token= (IToken)fWords.get(buffer);
if (token != null) {
if (buffer.equals("$(call") || buffer.equals("$$(call")) {
if ((char)scanner.read() == ' ') {
do {
c= scanner.read();
} while (c == '(' || c == ')' || fDetector.isWordPart((char) c));
}
scanner.unread();
}
((TagDetector)fDetector).bracketNesting++;
return token;
}
if (fDefaultToken.isUndefined())
unreadBuffer(scanner);
return fDefaultToken;
}
}
scanner.unread();
return Token.UNDEFINED;
}
@Override
protected void unreadBuffer(ICharacterScanner scanner) {
for (int i= fBuffer.length() - 1; i >= 0; i--)
scanner.unread();
}
}
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