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/*
* $Id: PdfReaderInstance.java 4065 2009-09-16 23:09:11Z psoares33 $
*
* Copyright 2001, 2002 Paulo Soares
*
* 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 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library 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 Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* https://github.com/LibrePDF/OpenPDF
*/
package com.lowagie.text.pdf;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import com.lowagie.text.error_messages.MessageLocalization;
/**
* Instance of PdfReader in each output document.
*
* @author Paulo Soares ([email protected])
*/
class PdfReaderInstance {
static final PdfLiteral IDENTITYMATRIX = new PdfLiteral("[1 0 0 1 0 0]");
static final PdfNumber ONE = new PdfNumber(1);
int[] myXref;
PdfReader reader;
RandomAccessFileOrArray file;
HashMap importedPages = new HashMap<>();
PdfWriter writer;
HashMap visited = new HashMap<>();
ArrayList nextRound = new ArrayList<>();
PdfReaderInstance(PdfReader reader, PdfWriter writer) {
this.reader = reader;
this.writer = writer;
file = reader.getSafeFile();
myXref = new int[reader.getXrefSize()];
}
PdfReader getReader() {
return reader;
}
PdfImportedPage getImportedPage(int pageNumber) {
if (!reader.isOpenedWithFullPermissions())
throw new IllegalArgumentException(MessageLocalization.getComposedMessage("pdfreader.not.opened.with.owner.password"));
if (pageNumber < 1 || pageNumber > reader.getNumberOfPages())
throw new IllegalArgumentException(MessageLocalization.getComposedMessage("invalid.page.number.1", pageNumber));
Integer i = pageNumber;
PdfImportedPage pageT = importedPages.get(i);
if (pageT == null) {
pageT = new PdfImportedPage(this, writer, pageNumber);
importedPages.put(i, pageT);
}
return pageT;
}
int getNewObjectNumber(int number, int generation) {
if (myXref[number] == 0) {
myXref[number] = writer.getIndirectReferenceNumber();
nextRound.add(number);
}
return myXref[number];
}
RandomAccessFileOrArray getReaderFile() {
return file;
}
PdfObject getResources(int pageNumber) {
PdfObject obj = PdfReader.getPdfObjectRelease(reader.getPageNRelease(pageNumber).get(PdfName.RESOURCES));
return obj;
}
/**
* Gets the content stream of a page as a PdfStream object.
* @param pageNumber the page of which you want the stream
* @param compressionLevel the compression level you want to apply to the stream
* @return a PdfStream object
* @since 2.1.3 (the method already existed without param compressionLevel)
*/
PdfStream getFormXObject(int pageNumber, int compressionLevel) throws IOException {
PdfDictionary page = reader.getPageNRelease(pageNumber);
PdfObject contents = PdfReader.getPdfObjectRelease(page.get(PdfName.CONTENTS));
PdfDictionary dic = new PdfDictionary();
byte[] bout = null;
if (contents != null) {
if (contents.isStream())
dic.putAll((PRStream)contents);
else
bout = reader.getPageContent(pageNumber, file);
}
else
bout = new byte[0];
dic.put(PdfName.RESOURCES, PdfReader.getPdfObjectRelease(page.get(PdfName.RESOURCES)));
dic.put(PdfName.TYPE, PdfName.XOBJECT);
dic.put(PdfName.SUBTYPE, PdfName.FORM);
PdfImportedPage impPage = importedPages.get(pageNumber);
dic.put(PdfName.BBOX, new PdfRectangle(impPage.getBoundingBox()));
PdfArray matrix = impPage.getMatrix();
if (matrix == null)
dic.put(PdfName.MATRIX, IDENTITYMATRIX);
else
dic.put(PdfName.MATRIX, matrix);
dic.put(PdfName.FORMTYPE, ONE);
PRStream stream;
if (bout == null) {
stream = new PRStream((PRStream)contents, dic);
}
else {
stream = new PRStream(reader, bout, compressionLevel);
stream.putAll(dic);
}
return stream;
}
void writeAllVisited() throws IOException {
while (!nextRound.isEmpty()) {
List vec = nextRound;
nextRound = new ArrayList<>();
for (Integer i : vec) {
if (!visited.containsKey(i)) {
visited.put(i, null);
int n = i;
writer.addToBody(reader.getPdfObjectRelease(n), myXref[n]);
}
}
}
}
void writeAllPages() throws IOException {
try {
file.reOpen();
for (Object o : importedPages.values()) {
PdfImportedPage ip = (PdfImportedPage) o;
writer.addToBody(ip.getFormXObject(writer.getCompressionLevel()), ip.getIndirectReference());
}
writeAllVisited();
}
finally {
try {
reader.close();
file.close();
}
catch (Exception e) {
//Empty on purpose
}
}
}
}
