/*
* JBoss by Red Hat
* Copyright 2006-2009, Red Hat Middleware, LLC, and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ide.eclipse.freemarker.editor.rules;
import java.util.Stack;
import org.eclipse.jface.text.rules.ICharacterScanner;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.MultiLineRule;
/**
* @author <a href="mailto:joe@binamics.com">Joe Hudson</a>
*/
public class XmlRule extends MultiLineRule {
public XmlRule(IToken token) {
super("<", ">", token); //$NON-NLS-1$ //$NON-NLS-2$
}
protected boolean sequenceDetected(
ICharacterScanner scanner,
char[] sequence,
boolean eofAllowed) {
int c = scanner.read();
if (sequence[0] == '<') {
if (c == '?') {
// processing instruction - abort
scanner.unread();
return false;
}
if (c == '!') {
scanner.unread();
// comment - abort
return false;
}
if (c == '#') {
scanner.unread();
// directive - abort
return false;
}
} else if (sequence[0] == '>') {
scanner.unread();
}
return super.sequenceDetected(scanner, sequence, eofAllowed);
}
private int LT = '<';
private int LB = '[';
private int GT = '>';
protected boolean endSequenceDetected(ICharacterScanner scanner) {
int c;
char[][] delimiters= scanner.getLegalLineDelimiters();
boolean previousWasEscapeCharacter = false;
Stack stack = new Stack();
while ((c= scanner.read()) != ICharacterScanner.EOF) {
if (c == fEscapeCharacter) {
// Skip the escaped character.
scanner.read();
} else if (fEndSequence.length > 0 && c == fEndSequence[0]) {
// Check if the specified end sequence has been found.
if (sequenceDetected(scanner, fEndSequence, true))
return true;
} else if (fBreaksOnEOL) {
// Check for end of line since it can be used to terminate the pattern.
for (int i= 0; i < delimiters.length; i++) {
if (c == delimiters[i][0] && sequenceDetected(scanner, delimiters[i], true)) {
if (!fEscapeContinuesLine || !previousWasEscapeCharacter)
return true;
}
}
}
else if (c == '\"') {
if (stack.size() > 0 && stack.peek().equals("\"")) //$NON-NLS-1$
stack.pop();
}
else if (c == LT || c == LB) {
break;
}
else if (c == '$') {
int cNext = scanner.read();
if (cNext == ICharacterScanner.EOF) break;
else if (cNext == '{') {
stack.push(new String(new char[]{(char) c}));
scanner.unread();
}
if (stack.size() == 0) break;
}
else if (c == '}') {
if (stack.size() > 0 && stack.peek().equals("{")) //$NON-NLS-1$
stack.pop();
}
previousWasEscapeCharacter = (c == fEscapeCharacter);
}
if (fBreaksOnEOF) return true;
scanner.unread();
return false;
}
}