| /******************************************************************************* |
| * Copyright (c) 2006, 2012 Oracle Corporation 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: |
| * Oracle Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.bpel.ui.editors.xpath.rules; |
| |
| import org.eclipse.bpel.ui.editors.xpath.XPathWhitespaceDetector; |
| 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; |
| |
| /** |
| * Functions in XPath start with QName and are followed by a ( The exception are |
| * the basic nodes XML nodes like |
| * |
| * |
| * @author Michal Chmielewski (michal.chmielewski@oracle.com) |
| * @date Oct 26, 2006 |
| * |
| */ |
| |
| public class FunctionRule extends WordRule { |
| |
| static final XPathWhitespaceDetector fWhiteSpaceDetector = new XPathWhitespaceDetector (); |
| /** |
| * @param detector |
| */ |
| |
| public FunctionRule(IWordDetector detector) { |
| super(detector); |
| |
| } |
| |
| /** |
| * @param words |
| * @param token |
| */ |
| public void addWords(String[] words, IToken token) { |
| for (int i = 0; i < words.length; i++) { |
| addWord(words[i], token); |
| } |
| } |
| |
| |
| /** |
| * |
| * @see org.eclipse.jface.text.rules.IRule#evaluate(org.eclipse.jface.text.rules.ICharacterScanner) |
| */ |
| |
| |
| @Override |
| public IToken evaluate (ICharacterScanner scanner) { |
| |
| IToken token = super.evaluate(scanner); |
| if (token == Token.UNDEFINED) { |
| return token; |
| } |
| |
| // check if the following character is a ( - which is an argument list |
| // for a |
| // function. if so then this is a function call name |
| |
| int cnt = 0; |
| int ch; |
| do { |
| ch = scanner.read(); |
| cnt += 1; |
| } while (fWhiteSpaceDetector.isWhitespace((char) ch)); |
| |
| if (ch == '(') { |
| |
| // bingo ! |
| while (cnt > 0) { |
| scanner.unread(); |
| cnt -= 1; |
| } |
| |
| return token; |
| } |
| |
| // not a function call, so this is not a valid presentation |
| unreadBuffer(scanner); |
| |
| return Token.UNDEFINED; |
| } |
| } |