DocumentLineSource.java

package net.sf.colorer.eclipse.editors;

import net.sf.colorer.LineSource;

import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;

/**
 * Text information Line source for colorer's parser
 * Based on IDocument interface
 */
public class DocumentLineSource implements LineSource {

    private IDocument fDocument;

    public DocumentLineSource(IDocument document)
    {
        if (document == null) throw new IllegalArgumentException("DocumentLineSource: document == null");
        fDocument = document;
    }
    
    public String getLine(int lno) {
        if (fDocument.getNumberOfLines() <= lno)
            return null;
        try{
            IRegion linfo = fDocument.getLineInformation(lno);
            String line = fDocument.get(linfo.getOffset(),linfo.getLength());
            return line;
        }catch(BadLocationException e){
            return null;
        }
    }

}

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Colorer Library
 *
 * The Initial Developer of the Original Code is
 * Igor Russkih <irusskih at gmail dot com>.
 * Portions created by the Initial Developer are Copyright (C) 1999-2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
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 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */