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/*
* $Id: PdfReaderInstance.java,v 1.27 2003/05/02 09:01:27 blowagie Exp $
* $Name: $
*
* Copyright 2001, 2002 Paulo Soares
*
*
* 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.
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) 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.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.io.*;
/**
* Instance of PdfReader in each output document.
*
* @author Paulo Soares (psoares@consiste.pt)
*/
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 (pageNumber < 1 || pageNumber > reader.getNumberOfPages())
throw new IllegalArgumentException("Invalid page number");
Integer i = new Integer(pageNumber);
PdfImportedPage pageT = (PdfImportedPage)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(new Integer(number));
}
return myXref[number];
}
RandomAccessFileOrArray getReaderFile() {
return file;
}
PdfObject getResources(int pageNumber) {
PdfObject obj = PdfReader.getPdfObjectRelease(reader.getPageNRelease(pageNumber).get(PdfName.RESOURCES));
return obj;
}
PdfStream getFormXObject(int pageNumber) 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 = (PdfImportedPage)importedPages.get(new Integer(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);
stream.putAll(dic);
}
return stream;
}
void writeAllVisited() throws IOException {
while (nextRound.size() > 0) {
ArrayList vec = nextRound;
nextRound = new ArrayList();
for (int k = 0; k < vec.size(); ++k) {
Integer i = (Integer)vec.get(k);
if (!visited.containsKey(i)) {
visited.put(i, null);
int n = i.intValue();
writer.addToBody(reader.getPdfObjectRelease(n), myXref[n]);
}
}
}
}
void writeAllPages() throws IOException {
try {
file.reOpen();
for (Iterator it = importedPages.values().iterator(); it.hasNext();) {
PdfImportedPage ip = (PdfImportedPage)it.next();
writer.addToBody(ip.getFormXObject(), ip.getIndirectReference());
}
writeAllVisited();
}
finally {
try {
reader.close();
file.close();
}
catch (Exception e) {
//Empty on purpose
}
}
}
}
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