001/*
002 * $Id: RegionTextRenderFilter.java 4784 2011-03-15 08:33:00Z blowagie $
003 *
004 * This file is part of the iText (R) project.
005 * Copyright (c) 1998-2011 1T3XT BVBA
006 * Authors: Kevin Day, Bruno Lowagie, Paulo Soares, et al.
007 *
008 * This program is free software; you can redistribute it and/or modify
009 * it under the terms of the GNU Affero General Public License version 3
010 * as published by the Free Software Foundation with the addition of the
011 * following permission added to Section 15 as permitted in Section 7(a):
012 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
013 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
014 *
015 * This program is distributed in the hope that it will be useful, but
016 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
017 * or FITNESS FOR A PARTICULAR PURPOSE.
018 * See the GNU Affero General Public License for more details.
019 * You should have received a copy of the GNU Affero General Public License
020 * along with this program; if not, see http://www.gnu.org/licenses or write to
021 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
022 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
023 * http://itextpdf.com/terms-of-use/
024 *
025 * The interactive user interfaces in modified source and object code versions
026 * of this program must display Appropriate Legal Notices, as required under
027 * Section 5 of the GNU Affero General Public License.
028 *
029 * In accordance with Section 7(b) of the GNU Affero General Public License,
030 * a covered work must retain the producer line in every PDF that is created
031 * or manipulated using iText.
032 *
033 * You can be released from the requirements of the license by purchasing
034 * a commercial license. Buying such a license is mandatory as soon as you
035 * develop commercial activities involving the iText software without
036 * disclosing the source code of your own applications.
037 * These activities include: offering paid services to customers as an ASP,
038 * serving PDFs on the fly in a web application, shipping iText with a closed
039 * source product.
040 *
041 * For more information, please contact iText Software Corp. at this
042 * address: sales@itextpdf.com
043 */
044package com.itextpdf.text.pdf.parser;
045
046import java.awt.geom.Rectangle2D;
047
048
049/**
050 * A {@link RenderFilter} that only allows text within a specified rectangular region
051 * @since 5.0.1
052 */
053public class RegionTextRenderFilter extends RenderFilter {
054
055    /** the region to allow text from */
056    private final Rectangle2D filterRect;
057    
058    /**
059     * Constructs a filter
060     * @param filterRect the rectangle to filter text against.  Note that this is a java.awt.Rectangle !
061     */
062    public RegionTextRenderFilter(Rectangle2D filterRect) {
063        this.filterRect = filterRect;
064    }
065
066    /** 
067     * @see com.itextpdf.text.pdf.parser.RenderFilter#allowText(com.itextpdf.text.pdf.parser.TextRenderInfo)
068     */
069    public boolean allowText(TextRenderInfo renderInfo){
070        LineSegment segment = renderInfo.getBaseline();
071        Vector startPoint = segment.getStartPoint();
072        Vector endPoint = segment.getEndPoint();
073        
074        float x1 = startPoint.get(Vector.I1);
075        float y1 = startPoint.get(Vector.I2);
076        float x2 = endPoint.get(Vector.I1);
077        float y2 = endPoint.get(Vector.I2);
078        
079        return filterRect.intersectsLine(x1, y1, x2, y2);
080    }
081
082
083}