/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2017 iText Group NV
* Authors: Bruno Lowagie, Paulo Soares, Kevin Day, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS
*
* This program 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: sales@itextpdf.com
*/
package com.itextpdf.text.pdf.parser;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ListIterator;
import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import com.itextpdf.testutils.TestResourceUtils;
import com.itextpdf.text.pdf.PRIndirectReference;
import com.itextpdf.text.pdf.PRStream;
import com.itextpdf.text.pdf.PdfArray;
import com.itextpdf.text.pdf.PdfDictionary;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfObject;
import com.itextpdf.text.pdf.PdfReader;
public class PdfContentStreamProcessorTest
{
private DebugRenderListener _renderListener;
@BeforeClass
public static void setUpClass() throws Exception {
}
@Before
public void setUp() throws Exception{
_renderListener = new DebugRenderListener();
}
// Replicates iText bug 2817030
@Test
public void testPositionAfterTstar()
throws Exception
{
processBytes("yaxiststar.pdf", 1);
}
@Test
public void testFallbackForBadColorSpace()
throws Exception
{
processBytes("fallbackForBadColorSpace.pdf", 1);
}
private void processBytes(
final String resourceName,
final int pageNumber)
throws IOException
{
final PdfReader pdfReader = TestResourceUtils.getResourceAsPdfReader(this, resourceName);
final PdfDictionary pageDictionary = pdfReader.getPageN(pageNumber);
final PdfDictionary resourceDictionary = pageDictionary.getAsDict(PdfName.RESOURCES);
final PdfObject contentObject = pageDictionary.get(PdfName.CONTENTS);
final byte[] contentBytes = readContentBytes(contentObject);
PdfContentStreamProcessor processor = new PdfContentStreamProcessor(_renderListener);
processor.processContent(contentBytes, resourceDictionary);
}
@Test
public void testInlineImageWithUnsupportedDecodeFilter() throws IOException {
PdfReader reader= TestResourceUtils.getResourceAsPdfReader(this, "inlineImages01.pdf");
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
Integer page = reader.getNumberOfPages();
LocationTextExtractionStrategy strategy = parser.processContent(page, new LocationTextExtractionStrategy());
}
private byte[] readContentBytes(
final PdfObject contentObject)
throws IOException
{
final byte[] result;
switch (contentObject.type())
{
case PdfObject.INDIRECT:
final PRIndirectReference ref = (PRIndirectReference) contentObject;
final PdfObject directObject = PdfReader.getPdfObject(ref);
result = readContentBytes(directObject);
break;
case PdfObject.STREAM:
final PRStream stream = (PRStream) PdfReader.getPdfObject(contentObject);
result = PdfReader.getStreamBytes(stream);
break;
case PdfObject.ARRAY:
// Stitch together all content before calling processContent(), because
// processContent() resets state.
final ByteArrayOutputStream allBytes = new ByteArrayOutputStream();
final PdfArray contentArray = (PdfArray) contentObject;
final ListIterator<PdfObject> iter = contentArray.listIterator();
while (iter.hasNext())
{
final PdfObject element = iter.next();
allBytes.write(readContentBytes(element));
}
result = allBytes.toByteArray();
break;
default:
final String msg = "Unable to handle Content of type " + contentObject.getClass();
throw new IllegalStateException(msg);
}
return result;
}
private class DebugRenderListener implements RenderListener
{
private float _lastY = Float.MAX_VALUE;
public void renderText(TextRenderInfo renderInfo) {
Vector start = renderInfo.getBaseline().getStartPoint();
final float x = start.get(Vector.I1);
final float y = start.get(Vector.I2);
// System.out.println("Display text: '" + renderInfo.getText() + "' (" + x + "," + y + ")");
if (y > _lastY){
Assert.fail("Text has jumped back up the page");
}
_lastY = y;
}
public void beginTextBlock() {
_lastY = Float.MAX_VALUE;
}
public void endTextBlock() {
}
public void renderImage(ImageRenderInfo renderInfo) {
}
}
}