diff options
Diffstat (limited to 'src/main/java/com/lowagie/text/pdf/PdfReaderInstance.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/pdf/PdfReaderInstance.java | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/main/java/com/lowagie/text/pdf/PdfReaderInstance.java b/src/main/java/com/lowagie/text/pdf/PdfReaderInstance.java new file mode 100644 index 0000000..294e52d --- /dev/null +++ b/src/main/java/com/lowagie/text/pdf/PdfReaderInstance.java @@ -0,0 +1,182 @@ +/*
+ * $Id: PdfReaderInstance.java,v 1.52 2005/11/01 12:27:05 psoares33 Exp $
+ * $Name: $
+ *
+ * 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:
+ * 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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