WordPartDetector.java

/**
 * This file Copyright (c) 2005-2008 Aptana, Inc. This program is
 * dual-licensed under both the Aptana Public License and the GNU General
 * Public license. You may elect to use one or the other of these licenses.
 * 
 * This program is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT. Redistribution, except as permitted by whichever of
 * the GPL or APL youelect, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or modify this
 * program under the terms of the GNU General Public License,
 * Version 3, as published by the Free Software Foundation.  You should
 * have received a copy of the GNU General Public License, Version 3 along
 * with this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Aptana provides a special exception to allow redistribution of this file
 * with certain other free and open source software ("FOSS") code and certain additional terms
 * pursuant to Section 7 of the GPL. You may view the exception and these
 * terms on the web at http://www.aptana.com/legal/gpl/.
 * 
 * 2. For the Aptana Public License (APL), this program and the
 * accompanying materials are made available under the terms of the APL
 * v1.0 which accompanies this distribution, and is available at
 * http://www.aptana.com/legal/apl/.
 * 
 * You may view the GPL, Aptana's exception and additional terms, and the
 * APL in the file titled license.html at the root of the corresponding
 * plugin containing this source file.
 * 
 * Any modifications to this file must keep this entire header intact.
 */
package com.aptana.ide.editor.erb.contentassist;

import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.ITextViewer;

/**
 * Used to scan and detect for Ruby keywords
 * 
 * @author mbaumbach
 * 
 * @version 0.4
 */
public class WordPartDetector {
	String wordPart = "";

	int docOffset;

	/**
	 * Method WordPartDetector.
	 * 
	 * @param viewer
	 *            is a text viewer
	 * @param documentOffset
	 *            into the SQL document
	 */
	public WordPartDetector(ITextViewer viewer, int documentOffset) {
		docOffset = documentOffset - 1;
		try {
			while (((docOffset) >= viewer.getTopIndexStartOffset())
					&& (Character.isLetterOrDigit(viewer.getDocument().getChar(
							docOffset)) || viewer.getDocument().getChar(docOffset) == '_')) {
				docOffset--;
			}
			// we've been one step too far : increase the offset
			docOffset++;
			wordPart = viewer.getDocument().get(docOffset,
					documentOffset - docOffset);
		} catch (BadLocationException e) {
			// do nothing
		}
	}

	/**
	 * Method getString.
	 * 
	 * @return String
	 */
	public String getString() {
		return wordPart;
	}

	/**
	 * Get the document offset.
	 * 
	 * @return	The document offset.
	 */
	public int getOffset() {
		return docOffset;
	}

} // WordPartDetector