diff options
Diffstat (limited to 'src/main/java/com/lowagie/text/pdf/PdfReader.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/pdf/PdfReader.java | 3172 |
1 files changed, 0 insertions, 3172 deletions
diff --git a/src/main/java/com/lowagie/text/pdf/PdfReader.java b/src/main/java/com/lowagie/text/pdf/PdfReader.java deleted file mode 100644 index da46174..0000000 --- a/src/main/java/com/lowagie/text/pdf/PdfReader.java +++ /dev/null @@ -1,3172 +0,0 @@ -/*
- * $Id: PdfReader.java,v 1.76 2006/05/31 16:23:26 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.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.DataInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.net.URL;
-import java.util.List;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Set;
-import java.util.Iterator;
-import java.util.zip.InflaterInputStream;
-import java.util.Arrays;
-import java.util.Collections;
-
-import com.lowagie.text.Rectangle;
-import com.lowagie.text.PageSize;
-import com.lowagie.text.StringCompare;
-import com.lowagie.text.ExceptionConverter;
-
-/** Reads a PDF document.
- * @author Paulo Soares (psoares@consiste.pt)
- * @author Kazuya Ujihara
- */
-public class PdfReader {
-
- static final PdfName pageInhCandidates[] = {
- PdfName.MEDIABOX, PdfName.ROTATE, PdfName.RESOURCES, PdfName.CROPBOX
- };
-
- static final PdfName vpnames[] = {PdfName.HIDETOOLBAR, PdfName.HIDEMENUBAR,
- PdfName.HIDEWINDOWUI, PdfName.FITWINDOW, PdfName.CENTERWINDOW, PdfName.DISPLAYDOCTITLE};
- static final int vpints[] = {PdfWriter.HideToolbar, PdfWriter.HideMenubar,
- PdfWriter.HideWindowUI, PdfWriter.FitWindow, PdfWriter.CenterWindow, PdfWriter.DisplayDocTitle};
-
- static final byte endstream[] = PdfEncodings.convertToBytes("endstream", null);
- static final byte endobj[] = PdfEncodings.convertToBytes("endobj", null);
- protected PRTokeniser tokens;
- // Each xref pair is a position
- // type 0 -> -1, 0
- // type 1 -> offset, 0
- // type 2 -> index, obj num
- protected int xref[];
- protected HashMap objStmMark;
- protected IntHashtable objStmToOffset;
- protected boolean newXrefType;
- private ArrayList xrefObj;
- PdfDictionary rootPages;
- protected PdfDictionary trailer;
- //protected ArrayList pages;
- protected PdfDictionary catalog;
- protected PageRefs pageRefs;
- protected PRAcroForm acroForm = null;
- protected boolean acroFormParsed = false;
- protected ArrayList pageInh;
- protected boolean encrypted = false;
- protected boolean rebuilt = false;
- protected int freeXref;
- protected boolean tampered = false;
- protected int lastXref;
- protected int eofPos;
- protected char pdfVersion;
- protected PdfEncryption decrypt;
- protected byte password[] = null; //added by ujihara for decryption
- protected ArrayList strings = new ArrayList();
- protected boolean sharedStreams = true;
- protected boolean consolidateNamedDestinations = false;
- protected int rValue;
- protected int pValue;
- private int objNum;
- private int objGen;
- private boolean visited[];
- private IntHashtable newHits;
- private int fileLength;
- private boolean hybridXref;
- private int lastXrefPartial = -1;
- private boolean partial;
- private PRIndirectReference cryptoRef;
-
- /**
- * Holds value of property appendable.
- */
- private boolean appendable;
-
- protected PdfReader() {
- }
-
- /** Reads and parses a PDF document.
- * @param filename the file name of the document
- * @throws IOException on error
- */
- public PdfReader(String filename) throws IOException {
- this(filename, null);
- }
-
- /** Reads and parses a PDF document.
- * @param filename the file name of the document
- * @param ownerPassword the password to read the document
- * @throws IOException on error
- */
- public PdfReader(String filename, byte ownerPassword[]) throws IOException {
- password = ownerPassword;
- tokens = new PRTokeniser(filename);
- readPdf();
- }
-
- /** Reads and parses a PDF document.
- * @param pdfIn the byte array with the document
- * @throws IOException on error
- */
- public PdfReader(byte pdfIn[]) throws IOException {
- this(pdfIn, null);
- }
-
- /** Reads and parses a PDF document.
- * @param pdfIn the byte array with the document
- * @param ownerPassword the password to read the document
- * @throws IOException on error
- */
- public PdfReader(byte pdfIn[], byte ownerPassword[]) throws IOException {
- password = ownerPassword;
- tokens = new PRTokeniser(pdfIn);
- readPdf();
- }
-
- /** Reads and parses a PDF document.
- * @param url the URL of the document
- * @throws IOException on error
- */
- public PdfReader(URL url) throws IOException {
- this(url, null);
- }
-
- /** Reads and parses a PDF document.
- * @param url the URL of the document
- * @param ownerPassword the password to read the document
- * @throws IOException on error
- */
- public PdfReader(URL url, byte ownerPassword[]) throws IOException {
- password = ownerPassword;
- tokens = new PRTokeniser(new RandomAccessFileOrArray(url));
- readPdf();
- }
-
- /**
- * Reads and parses a PDF document.
- * @param is the <CODE>InputStream</CODE> containing the document. The stream is read to the
- * end but is not closed
- * @param ownerPassword the password to read the document
- * @throws IOException on error
- */
- public PdfReader(InputStream is, byte ownerPassword[]) throws IOException {
- password = ownerPassword;
- tokens = new PRTokeniser(new RandomAccessFileOrArray(is));
- readPdf();
- }
-
- /**
- * Reads and parses a PDF document.
- * @param is the <CODE>InputStream</CODE> containing the document. The stream is read to the
- * end but is not closed
- * @throws IOException on error
- */
- public PdfReader(InputStream is) throws IOException {
- this(is, null);
- }
-
- /**
- * Reads and parses a pdf document. Contrary to the other constructors only the xref is read
- * into memory. The reader is said to be working in "partial" mode as only parts of the pdf
- * are read as needed. The pdf is left open but may be closed at any time with
- * <CODE>PdfReader.close()</CODE>, reopen is automatic.
- * @param raf the document location
- * @param ownerPassword the password or <CODE>null</CODE> for no password
- * @throws IOException on error
- */
- public PdfReader(RandomAccessFileOrArray raf, byte ownerPassword[]) throws IOException {
- password = ownerPassword;
- partial = true;
- tokens = new PRTokeniser(raf);
- readPdfPartial();
- }
-
- /** Creates an independent duplicate.
- * @param reader the <CODE>PdfReader</CODE> to duplicate
- */
- public PdfReader(PdfReader reader) {
- this.appendable = reader.appendable;
- this.consolidateNamedDestinations = reader.consolidateNamedDestinations;
- this.encrypted = reader.encrypted;
- this.rebuilt = reader.rebuilt;
- this.sharedStreams = reader.sharedStreams;
- this.tampered = reader.tampered;
- this.password = reader.password;
- this.pdfVersion = reader.pdfVersion;
- this.eofPos = reader.eofPos;
- this.freeXref = reader.freeXref;
- this.lastXref = reader.lastXref;
- this.tokens = new PRTokeniser(reader.tokens.getSafeFile());
- if (reader.decrypt != null)
- this.decrypt = new PdfEncryption(reader.decrypt);
- this.pValue = reader.pValue;
- this.rValue = reader.rValue;
- this.xrefObj = new ArrayList(reader.xrefObj);
- for (int k = 0; k < reader.xrefObj.size(); ++k) {
- this.xrefObj.set(k, duplicatePdfObject((PdfObject)reader.xrefObj.get(k), this));
- }
- this.pageRefs = new PageRefs(reader.pageRefs, this);
- this.trailer = (PdfDictionary)duplicatePdfObject(reader.trailer, this);
- this.catalog = (PdfDictionary)getPdfObject(trailer.get(PdfName.ROOT));
- this.rootPages = (PdfDictionary)getPdfObject(catalog.get(PdfName.PAGES));
- this.fileLength = reader.fileLength;
- this.partial = reader.partial;
- this.hybridXref = reader.hybridXref;
- this.objStmToOffset = reader.objStmToOffset;
- this.xref = reader.xref;
- this.cryptoRef = (PRIndirectReference)duplicatePdfObject(reader.cryptoRef, this);
- }
-
- /** Gets a new file instance of the original PDF
- * document.
- * @return a new file instance of the original PDF document
- */
- public RandomAccessFileOrArray getSafeFile() {
- return tokens.getSafeFile();
- }
-
- protected PdfReaderInstance getPdfReaderInstance(PdfWriter writer) {
- return new PdfReaderInstance(this, writer);
- }
-
- /** Gets the number of pages in the document.
- * @return the number of pages in the document
- */
- public int getNumberOfPages() {
- return pageRefs.size();
- }
-
- /** Returns the document's catalog. This dictionary is not a copy,
- * any changes will be reflected in the catalog.
- * @return the document's catalog
- */
- public PdfDictionary getCatalog() {
- return catalog;
- }
-
- /** Returns the document's acroform, if it has one.
- * @return the document's acroform
- */
- public PRAcroForm getAcroForm() {
- if (!acroFormParsed) {
- acroFormParsed = true;
- PdfObject form = catalog.get(PdfName.ACROFORM);
- if (form != null) {
- try {
- acroForm = new PRAcroForm(this);
- acroForm.readAcroForm((PdfDictionary)getPdfObject(form));
- }
- catch (Exception e) {
- acroForm = null;
- }
- }
- }
- return acroForm;
- }
- /**
- * Gets the page rotation. This value can be 0, 90, 180 or 270.
- * @param index the page number. The first page is 1
- * @return the page rotation
- */
- public int getPageRotation(int index) {
- return getPageRotation(pageRefs.getPageNRelease(index));
- }
-
- int getPageRotation(PdfDictionary page) {
- PdfNumber rotate = (PdfNumber)getPdfObject(page.get(PdfName.ROTATE));
- if (rotate == null)
- return 0;
- else {
- int n = rotate.intValue();
- n %= 360;
- return n < 0 ? n + 360 : n;
- }
- }
- /** Gets the page size, taking rotation into account. This
- * is a <CODE>Rectangle</CODE> with the value of the /MediaBox and the /Rotate key.
- * @param index the page number. The first page is 1
- * @return a <CODE>Rectangle</CODE>
- */
- public Rectangle getPageSizeWithRotation(int index) {
- return getPageSizeWithRotation(pageRefs.getPageNRelease(index));
- }
-
- /**
- * Gets the rotated page from a page dictionary.
- * @param page the page dictionary
- * @return the rotated page
- */
- public Rectangle getPageSizeWithRotation(PdfDictionary page) {
- Rectangle rect = getPageSize(page);
- int rotation = getPageRotation(page);
- while (rotation > 0) {
- rect = rect.rotate();
- rotation -= 90;
- }
- return rect;
- }
-
- /** Gets the page size without taking rotation into account. This
- * is the value of the /MediaBox key.
- * @param index the page number. The first page is 1
- * @return the page size
- */
- public Rectangle getPageSize(int index) {
- return getPageSize(pageRefs.getPageNRelease(index));
- }
-
- /**
- * Gets the page from a page dictionary
- * @param page the page dictionary
- * @return the page
- */
- public Rectangle getPageSize(PdfDictionary page) {
- PdfArray mediaBox = (PdfArray)getPdfObject(page.get(PdfName.MEDIABOX));
- return getNormalizedRectangle(mediaBox);
- }
-
- /** Gets the crop box without taking rotation into account. This
- * is the value of the /CropBox key. The crop box is the part
- * of the document to be displayed or printed. It usually is the same
- * as the media box but may be smaller. If the page doesn't have a crop
- * box the page size will be returned.
- * @param index the page number. The first page is 1
- * @return the crop box
- */
- public Rectangle getCropBox(int index) {
- PdfDictionary page = pageRefs.getPageNRelease(index);
- PdfArray cropBox = (PdfArray)getPdfObjectRelease(page.get(PdfName.CROPBOX));
- if (cropBox == null)
- return getPageSize(page);
- return getNormalizedRectangle(cropBox);
- }
-
- /** Gets the box size. Allowed names are: "crop", "trim", "art", "bleed" and "media".
- * @param index the page number. The first page is 1
- * @param boxName the box name
- * @return the box rectangle or null
- */
- public Rectangle getBoxSize(int index, String boxName) {
- PdfDictionary page = pageRefs.getPageNRelease(index);
- PdfArray box = null;
- if (boxName.equals("trim"))
- box = (PdfArray)getPdfObjectRelease(page.get(PdfName.TRIMBOX));
- else if (boxName.equals("art"))
- box = (PdfArray)getPdfObjectRelease(page.get(PdfName.ARTBOX));
- else if (boxName.equals("bleed"))
- box = (PdfArray)getPdfObjectRelease(page.get(PdfName.BLEEDBOX));
- else if (boxName.equals("crop"))
- box = (PdfArray)getPdfObjectRelease(page.get(PdfName.CROPBOX));
- else if (boxName.equals("media"))
- box = (PdfArray)getPdfObjectRelease(page.get(PdfName.MEDIABOX));
- if (box == null)
- return null;
- return getNormalizedRectangle(box);
- }
-
- /** Returns the content of the document information dictionary as a <CODE>HashMap</CODE>
- * of <CODE>String</CODE>.
- * @return content of the document information dictionary
- */
- public HashMap getInfo() {
- HashMap map = new HashMap();
- PdfDictionary info = (PdfDictionary)getPdfObject(trailer.get(PdfName.INFO));
- if (info == null)
- return map;
- for (Iterator it = info.getKeys().iterator(); it.hasNext();) {
- PdfName key = (PdfName)it.next();
- PdfObject obj = getPdfObject(info.get(key));
- if (obj == null)
- continue;
- String value = obj.toString();
- switch (obj.type()) {
- case PdfObject.STRING: {
- value = ((PdfString)obj).toUnicodeString();
- break;
- }
- case PdfObject.NAME: {
- value = PdfName.decodeName(value);
- break;
- }
- }
- map.put(PdfName.decodeName(key.toString()), value);
- }
- return map;
- }
-
- /** Normalizes a <CODE>Rectangle</CODE> so that llx and lly are smaller than urx and ury.
- * @param box the original rectangle
- * @return a normalized <CODE>Rectangle</CODE>
- */
- public static Rectangle getNormalizedRectangle(PdfArray box) {
- ArrayList rect = box.getArrayList();
- float llx = ((PdfNumber)rect.get(0)).floatValue();
- float lly = ((PdfNumber)rect.get(1)).floatValue();
- float urx = ((PdfNumber)rect.get(2)).floatValue();
- float ury = ((PdfNumber)rect.get(3)).floatValue();
- return new Rectangle(Math.min(llx, urx), Math.min(lly, ury),
- Math.max(llx, urx), Math.max(lly, ury));
- }
-
- protected void readPdf() throws IOException {
- try {
- fileLength = tokens.getFile().length();
- pdfVersion = tokens.checkPdfHeader();
- try {
- readXref();
- }
- catch (Exception e) {
- try {
- rebuilt = true;
- rebuildXref();
- lastXref = -1;
- }
- catch (Exception ne) {
- throw new IOException("Rebuild failed: " + ne.getMessage() + "; Original message: " + e.getMessage());
- }
- }
- try {
- readDocObj();
- }
- catch (IOException ne) {
- if (rebuilt)
- throw ne;
- rebuilt = true;
- encrypted = false;
- rebuildXref();
- lastXref = -1;
- readDocObj();
- }
-
- strings.clear();
- readPages();
- eliminateSharedStreams();
- removeUnusedObjects();
- }
- finally {
- try {
- tokens.close();
- }
- catch (Exception e) {
- // empty on purpose
- }
- }
- }
-
- protected void readPdfPartial() throws IOException {
- try {
- fileLength = tokens.getFile().length();
- pdfVersion = tokens.checkPdfHeader();
- try {
- readXref();
- }
- catch (Exception e) {
- try {
- rebuilt = true;
- rebuildXref();
- lastXref = -1;
- }
- catch (Exception ne) {
- throw new IOException("Rebuild failed: " + ne.getMessage() + "; Original message: " + e.getMessage());
- }
- }
- readDocObjPartial();
- readPages();
- }
- catch (IOException e) {
- try{tokens.close();}catch(Exception ee){}
- throw e;
- }
- }
-
- private boolean equalsArray(byte ar1[], byte ar2[], int size) {
- for (int k = 0; k < size; ++k) {
- if (ar1[k] != ar2[k])
- return false;
- }
- return true;
- }
-
- /**
- * @throws IOException
- */
- private void readDecryptedDocObj() throws IOException {
- if (encrypted)
- return;
- PdfObject encDic = trailer.get(PdfName.ENCRYPT);
- if (encDic == null || encDic.toString().equals("null"))
- return;
- encrypted = true;
- PdfDictionary enc = (PdfDictionary)getPdfObject(encDic);
-
- String s;
- PdfObject o;
-
- PdfArray documentIDs = (PdfArray)getPdfObject(trailer.get(PdfName.ID));
- byte documentID[] = null;
- if (documentIDs != null) {
- o = (PdfObject)documentIDs.getArrayList().get(0);
- s = o.toString();
- documentID = com.lowagie.text.DocWriter.getISOBytes(s);
- }
-
- s = enc.get(PdfName.U).toString();
- byte uValue[] = com.lowagie.text.DocWriter.getISOBytes(s);
- s = enc.get(PdfName.O).toString();
- byte oValue[] = com.lowagie.text.DocWriter.getISOBytes(s);
-
- o = enc.get(PdfName.R);
- if (!o.isNumber()) throw new IOException("Illegal R value.");
- rValue = ((PdfNumber)o).intValue();
- if (rValue != 2 && rValue != 3) throw new IOException("Unknown encryption type (" + rValue + ")");
-
- o = enc.get(PdfName.P);
- if (!o.isNumber()) throw new IOException("Illegal P value.");
- pValue = ((PdfNumber)o).intValue();
-
- // get the Keylength if Revision is 3
- int lengthValue;
- if ( rValue == 3 ){
- o = enc.get(PdfName.LENGTH);
- if (!o.isNumber())
- throw new IOException("Illegal Length value.");
- lengthValue = ( (PdfNumber) o).intValue();
- if (lengthValue > 128 || lengthValue < 40 || lengthValue % 8 != 0)
- throw new IOException("Illegal Length value.");
- } else {
- // Keylength is 40 bit in revision 2
- lengthValue=40;
- }
-
-
-
- decrypt = new PdfEncryption();
-
- //check by user password
- decrypt.setupByUserPassword(documentID, password, oValue, pValue, lengthValue, rValue);
- if (!equalsArray(uValue, decrypt.userKey, rValue == 3 ? 16 : 32)) {
- //check by owner password
- decrypt.setupByOwnerPassword(documentID, password, uValue, oValue, pValue, lengthValue, rValue);
- if (!equalsArray(uValue, decrypt.userKey, rValue == 3 ? 16 : 32)) {
- throw new IOException("Bad user password");
- }
- }
- for (int k = 0; k < strings.size(); ++k) {
- PdfString str = (PdfString)strings.get(k);
- str.decrypt(this);
- }
- if (encDic.isIndirect()) {
- cryptoRef = (PRIndirectReference)encDic;
- xrefObj.set(cryptoRef.getNumber(), null);
- }
- }
-
- /**
- * @param obj
- * @return a PdfObject
- */
- public static PdfObject getPdfObjectRelease(PdfObject obj) {
- PdfObject obj2 = getPdfObject(obj);
- releaseLastXrefPartial(obj);
- return obj2;
- }
-
-
- /**
- * Reads a <CODE>PdfObject</CODE> resolving an indirect reference
- * if needed.
- * @param obj the <CODE>PdfObject</CODE> to read
- * @return the resolved <CODE>PdfObject</CODE>
- */
- public static PdfObject getPdfObject(PdfObject obj) {
- if (obj == null)
- return null;
- if (!obj.isIndirect())
- return obj;
- try {
- PRIndirectReference ref = (PRIndirectReference)obj;
- int idx = ref.getNumber();
- boolean appendable = ref.getReader().appendable;
- obj = ref.getReader().getPdfObject(idx);
- if (obj == null) {
- if (appendable) {
- obj = new PdfNull();
- obj.setIndRef(ref);
- return obj;
- }
- else
- return PdfNull.PDFNULL;
- }
- else {
- if (appendable) {
- switch (obj.type()) {
- case PdfObject.NULL:
- obj = new PdfNull();
- break;
- case PdfObject.BOOLEAN:
- obj = new PdfBoolean(((PdfBoolean)obj).booleanValue());
- break;
- case PdfObject.NAME:
- obj = new PdfName(obj.getBytes());
- break;
- }
- obj.setIndRef(ref);
- }
- return obj;
- }
- }
- catch (Exception e) {
- throw new ExceptionConverter(e);
- }
- }
-
- /**
- * Reads a <CODE>PdfObject</CODE> resolving an indirect reference
- * if needed. If the reader was opened in partial mode the object will be released
- * to save memory.
- * @param obj the <CODE>PdfObject</CODE> to read
- * @param parent
- * @return a PdfObject
- */
- public static PdfObject getPdfObjectRelease(PdfObject obj, PdfObject parent) {
- PdfObject obj2 = getPdfObject(obj, parent);
- releaseLastXrefPartial(obj);
- return obj2;
- }
-
- /**
- * @param obj
- * @param parent
- * @return a PdfObject
- */
- public static PdfObject getPdfObject(PdfObject obj, PdfObject parent) {
- if (obj == null)
- return null;
- if (!obj.isIndirect()) {
- PRIndirectReference ref = null;
- if (parent != null && (ref = parent.getIndRef()) != null && ref.getReader().isAppendable()) {
- switch (obj.type()) {
- case PdfObject.NULL:
- obj = new PdfNull();
- break;
- case PdfObject.BOOLEAN:
- obj = new PdfBoolean(((PdfBoolean)obj).booleanValue());
- break;
- case PdfObject.NAME:
- obj = new PdfName(obj.getBytes());
- break;
- }
- obj.setIndRef(ref);
- }
- return obj;
- }
- return getPdfObject(obj);
- }
-
- /**
- * @param idx
- * @return a PdfObject
- */
- public PdfObject getPdfObjectRelease(int idx) {
- PdfObject obj = getPdfObject(idx);
- releaseLastXrefPartial();
- return obj;
- }
-
- /**
- * @param idx
- * @return aPdfObject
- */
- public PdfObject getPdfObject(int idx) {
- try {
- lastXrefPartial = -1;
- if (idx < 0 || idx >= xrefObj.size())
- return null;
- PdfObject obj = (PdfObject)xrefObj.get(idx);
- if (!partial || obj != null)
- return obj;
- if (idx * 2 >= xref.length)
- return null;
- obj = readSingleObject(idx);
- lastXrefPartial = -1;
- if (obj != null)
- lastXrefPartial = idx;
- return obj;
- }
- catch (Exception e) {
- throw new ExceptionConverter(e);
- }
- }
-
- /**
- *
- */
- public void resetLastXrefPartial() {
- lastXrefPartial = -1;
- }
-
- /**
- *
- */
- public void releaseLastXrefPartial() {
- if (partial && lastXrefPartial != -1) {
- xrefObj.set(lastXrefPartial, null);
- lastXrefPartial = -1;
- }
- }
-
- /**
- * @param obj
- */
- public static void releaseLastXrefPartial(PdfObject obj) {
- if (obj == null)
- return;
- if (!obj.isIndirect())
- return;
- PRIndirectReference ref = (PRIndirectReference)obj;
- PdfReader reader = ref.getReader();
- if (reader.partial && reader.lastXrefPartial != -1 && reader.lastXrefPartial == ref.getNumber()) {
- reader.xrefObj.set(reader.lastXrefPartial, null);
- }
- reader.lastXrefPartial = -1;
- }
-
- private void setXrefPartialObject(int idx, PdfObject obj) {
- if (!partial || idx < 0)
- return;
- xrefObj.set(idx, obj);
- }
-
- /**
- * @param obj
- * @return an indirect reference
- */
- public PRIndirectReference addPdfObject(PdfObject obj) {
- xrefObj.add(obj);
- return new PRIndirectReference(this, xrefObj.size() - 1);
- }
-
- protected void readPages() throws IOException {
- pageInh = new ArrayList();
- catalog = (PdfDictionary)getPdfObject(trailer.get(PdfName.ROOT));
- rootPages = (PdfDictionary)getPdfObject(catalog.get(PdfName.PAGES));
- pageRefs = new PageRefs(this);
- }
-
- protected void readDocObjPartial() throws IOException {
- xrefObj = new ArrayList(xref.length / 2);
- xrefObj.addAll(Collections.nCopies(xref.length / 2, null));
- readDecryptedDocObj();
- if (objStmToOffset != null) {
- int keys[] = objStmToOffset.getKeys();
- for (int k = 0; k < keys.length; ++k) {
- int n = keys[k];
- objStmToOffset.put(n, xref[n * 2]);
- xref[n * 2] = -1;
- }
- }
- }
-
- protected PdfObject readSingleObject(int k) throws IOException {
- strings.clear();
- int k2 = k * 2;
- int pos = xref[k2];
- if (pos < 0)
- return null;
- if (xref[k2 + 1] > 0)
- pos = objStmToOffset.get(xref[k2 + 1]);
- tokens.seek(pos);
- tokens.nextValidToken();
- if (tokens.getTokenType() != PRTokeniser.TK_NUMBER)
- tokens.throwError("Invalid object number.");
- objNum = tokens.intValue();
- tokens.nextValidToken();
- if (tokens.getTokenType() != PRTokeniser.TK_NUMBER)
- tokens.throwError("Invalid generation number.");
- objGen = tokens.intValue();
- tokens.nextValidToken();
- if (!tokens.getStringValue().equals("obj"))
- tokens.throwError("Token 'obj' expected.");
- PdfObject obj;
- try {
- obj = readPRObject();
- for (int j = 0; j < strings.size(); ++j) {
- PdfString str = (PdfString)strings.get(j);
- str.decrypt(this);
- }
- if (obj.isStream()) {
- checkPRStreamLength((PRStream)obj);
- }
- }
- catch (Exception e) {
- obj = null;
- }
- if (xref[k2 + 1] > 0) {
- obj = readOneObjStm((PRStream)obj, xref[k2]);
- }
- xrefObj.set(k, obj);
- return obj;
- }
-
- protected PdfObject readOneObjStm(PRStream stream, int idx) throws IOException {
- int first = ((PdfNumber)getPdfObject(stream.get(PdfName.FIRST))).intValue();
- byte b[] = getStreamBytes(stream, tokens.getFile());
- PRTokeniser saveTokens = tokens;
- tokens = new PRTokeniser(b);
- try {
- int address = 0;
- boolean ok = true;
- ++idx;
- for (int k = 0; k < idx; ++k) {
- ok = tokens.nextToken();
- if (!ok)
- break;
- if (tokens.getTokenType() != PRTokeniser.TK_NUMBER) {
- ok = false;
- break;
- }
- ok = tokens.nextToken();
- if (!ok)
- break;
- if (tokens.getTokenType() != PRTokeniser.TK_NUMBER) {
- ok = false;
- break;
- }
- address = tokens.intValue() + first;
- }
- if (!ok)
- throw new IOException("Error reading ObjStm");
- tokens.seek(address);
- return readPRObject();
- }
- finally {
- tokens = saveTokens;
- }
- }
-
- /**
- * @return the percentage of the cross reference table that has been read
- */
- public double dumpPerc() {
- int total = 0;
- for (int k = 0; k < xrefObj.size(); ++k) {
- if (xrefObj.get(k) != null)
- ++total;
- }
- return (total * 100.0 / xrefObj.size());
- }
-
- protected void readDocObj() throws IOException {
- ArrayList streams = new ArrayList();
- xrefObj = new ArrayList(xref.length / 2);
- xrefObj.addAll(Collections.nCopies(xref.length / 2, null));
- for (int k = 2; k < xref.length; k += 2) {
- int pos = xref[k];
- if (pos <= 0 || xref[k + 1] > 0)
- continue;
- tokens.seek(pos);
- tokens.nextValidToken();
- if (tokens.getTokenType() != PRTokeniser.TK_NUMBER)
- tokens.throwError("Invalid object number.");
- objNum = tokens.intValue();
- tokens.nextValidToken();
- if (tokens.getTokenType() != PRTokeniser.TK_NUMBER)
- tokens.throwError("Invalid generation number.");
- objGen = tokens.intValue();
- tokens.nextValidToken();
- if (!tokens.getStringValue().equals("obj"))
- tokens.throwError("Token 'obj' expected.");
- PdfObject obj;
- try {
- obj = readPRObject();
- if (obj.isStream()) {
- streams.add(obj);
- }
- }
- catch (Exception e) {
- obj = null;
- }
- xrefObj.set(k / 2, obj);
- }
- for (int k = 0; k < streams.size(); ++k) {
- checkPRStreamLength((PRStream)streams.get(k));
- }
- readDecryptedDocObj();
- if (objStmMark != null) {
- for (Iterator i = objStmMark.entrySet().iterator(); i.hasNext();) {
- Map.Entry entry = (Map.Entry)i.next();
- int n = ((Integer)entry.getKey()).intValue();
- IntHashtable h = (IntHashtable)entry.getValue();
- readObjStm((PRStream)xrefObj.get(n), h);
- xrefObj.set(n, null);
- }
- objStmMark = null;
- }
- xref = null;
- }
-
- private void checkPRStreamLength(PRStream stream) throws IOException {
- int fileLength = tokens.length();
- int start = stream.getOffset();
- boolean calc = false;
- int streamLength = 0;
- PdfObject obj = getPdfObjectRelease(stream.get(PdfName.LENGTH));
- if (obj != null && obj.type() == PdfObject.NUMBER) {
- streamLength = ((PdfNumber)obj).intValue();
- if (streamLength + start > fileLength - 20)
- calc = true;
- else {
- tokens.seek(start + streamLength);
- String line = tokens.readString(20);
- if (!line.startsWith("\nendstream") &&
- !line.startsWith("\r\nendstream") &&
- !line.startsWith("\rendstream") &&
- !line.startsWith("endstream"))
- calc = true;
- }
- }
- else
- calc = true;
- if (calc) {
- byte tline[] = new byte[16];
- tokens.seek(start);
- while (true) {
- int pos = tokens.getFilePointer();
- if (!tokens.readLineSegment(tline))
- break;
- if (equalsn(tline, endstream)) {
- streamLength = pos - start;
- break;
- }
- if (equalsn(tline, endobj)) {
- tokens.seek(pos - 16);
- String s = tokens.readString(16);
- int index = s.indexOf("endstream");
- if (index >= 0)
- pos = pos - 16 + index;
- streamLength = pos - start;
- break;
- }
- }
- }
- stream.setLength(streamLength);
- }
-
- protected void readObjStm(PRStream stream, IntHashtable map) throws IOException {
- int first = ((PdfNumber)getPdfObject(stream.get(PdfName.FIRST))).intValue();
- int n = ((PdfNumber)getPdfObject(stream.get(PdfName.N))).intValue();
- byte b[] = getStreamBytes(stream, tokens.getFile());
- PRTokeniser saveTokens = tokens;
- tokens = new PRTokeniser(b);
- try {
- int address[] = new int[n];
- int objNumber[] = new int[n];
- boolean ok = true;
- for (int k = 0; k < n; ++k) {
- ok = tokens.nextToken();
- if (!ok)
- break;
- if (tokens.getTokenType() != PRTokeniser.TK_NUMBER) {
- ok = false;
- break;
- }
- objNumber[k] = tokens.intValue();
- ok = tokens.nextToken();
- if (!ok)
- break;
- if (tokens.getTokenType() != PRTokeniser.TK_NUMBER) {
- ok = false;
- break;
- }
- address[k] = tokens.intValue() + first;
- }
- if (!ok)
- throw new IOException("Error reading ObjStm");
- for (int k = 0; k < n; ++k) {
- if (map.containsKey(k)) {
- tokens.seek(address[k]);
- PdfObject obj = readPRObject();
- xrefObj.set(objNumber[k], obj);
- }
- }
- }
- finally {
- tokens = saveTokens;
- }
- }
-
- /**
- * Eliminates the reference to the object freeing the memory used by it and clearing
- * the xref entry.
- * @param obj the object. If it's an indirect reference it will be eliminated
- * @return the object or the already erased dereferenced object
- */
- public static PdfObject killIndirect(PdfObject obj) {
- if (obj == null || obj.isNull())
- return null;
- PdfObject ret = getPdfObjectRelease(obj);
- if (obj.isIndirect()) {
- PRIndirectReference ref = (PRIndirectReference)obj;
- PdfReader reader = ref.getReader();
- int n = ref.getNumber();
- reader.xrefObj.set(n, null);
- if (reader.partial)
- reader.xref[n * 2] = -1;
- }
- return ret;
- }
-
- private void ensureXrefSize(int size) {
- if (size == 0)
- return;
- if (xref == null)
- xref = new int[size];
- else {
- if (xref.length < size) {
- int xref2[] = new int[size];
- System.arraycopy(xref, 0, xref2, 0, xref.length);
- xref = xref2;
- }
- }
- }
-
- protected void readXref() throws IOException {
- hybridXref = false;
- newXrefType = false;
- tokens.seek(tokens.getStartxref());
- tokens.nextToken();
- if (!tokens.getStringValue().equals("startxref"))
- throw new IOException("startxref not found.");
- tokens.nextToken();
- if (tokens.getTokenType() != PRTokeniser.TK_NUMBER)
- throw new IOException("startxref is not followed by a number.");
- int startxref = tokens.intValue();
- lastXref = startxref;
- eofPos = tokens.getFilePointer();
- try {
- if (readXRefStream(startxref)) {
- newXrefType = true;
- return;
- }
- }
- catch (Exception e) {}
- xref = null;
- tokens.seek(startxref);
- trailer = readXrefSection();
- PdfDictionary trailer2 = trailer;
- while (true) {
- PdfNumber prev = (PdfNumber)trailer2.get(PdfName.PREV);
- if (prev == null)
- break;
- tokens.seek(prev.intValue());
- trailer2 = readXrefSection();
- }
- }
-
- protected PdfDictionary readXrefSection() throws IOException {
- tokens.nextValidToken();
- if (!tokens.getStringValue().equals("xref"))
- tokens.throwError("xref subsection not found");
- int start = 0;
- int end = 0;
- int pos = 0;
- int gen = 0;
- while (true) {
- tokens.nextValidToken();
- if (tokens.getStringValue().equals("trailer"))
- break;
- if (tokens.getTokenType() != PRTokeniser.TK_NUMBER)
- tokens.throwError("Object number of the first object in this xref subsection not found");
- start = tokens.intValue();
- tokens.nextValidToken();
- if (tokens.getTokenType() != PRTokeniser.TK_NUMBER)
- tokens.throwError("Number of entries in this xref subsection not found");
- end = tokens.intValue() + start;
- if (start == 1) { // fix incorrect start number
- int back = tokens.getFilePointer();
- tokens.nextValidToken();
- pos = tokens.intValue();
- tokens.nextValidToken();
- gen = tokens.intValue();
- if (pos == 0 && gen == 65535) {
- --start;
- --end;
- }
- tokens.seek(back);
- }
- ensureXrefSize(end * 2);
- for (int k = start; k < end; ++k) {
- tokens.nextValidToken();
- pos = tokens.intValue();
- tokens.nextValidToken();
- gen = tokens.intValue();
- tokens.nextValidToken();
- int p = k * 2;
- if (tokens.getStringValue().equals("n")) {
- if (xref[p] == 0 && xref[p + 1] == 0) {
-// if (pos == 0)
-// tokens.throwError("File position 0 cross-reference entry in this xref subsection");
- xref[p] = pos;
- }
- }
- else if (tokens.getStringValue().equals("f")) {
- if (xref[p] == 0 && xref[p + 1] == 0)
- xref[p] = -1;
- }
- else
- tokens.throwError("Invalid cross-reference entry in this xref subsection");
- }
- }
- PdfDictionary trailer = (PdfDictionary)readPRObject();
- PdfNumber xrefSize = (PdfNumber)trailer.get(PdfName.SIZE);
- ensureXrefSize(xrefSize.intValue() * 2);
- PdfObject xrs = trailer.get(PdfName.XREFSTM);
- if (xrs != null && xrs.isNumber()) {
- int loc = ((PdfNumber)xrs).intValue();
- try {
- readXRefStream(loc);
- newXrefType = true;
- hybridXref = true;
- }
- catch (IOException e) {
- xref = null;
- throw e;
- }
- }
- return trailer;
- }
-
- protected boolean readXRefStream(int ptr) throws IOException {
- tokens.seek(ptr);
- int thisStream = 0;
- if (!tokens.nextToken())
- return false;
- if (tokens.getTokenType() != PRTokeniser.TK_NUMBER)
- return false;
- thisStream = tokens.intValue();
- if (!tokens.nextToken() || tokens.getTokenType() != PRTokeniser.TK_NUMBER)
- return false;
- if (!tokens.nextToken() || !tokens.getStringValue().equals("obj"))
- return false;
- PdfObject object = readPRObject();
- PRStream stm = null;
- if (object.isStream()) {
- stm = (PRStream)object;
- if (!PdfName.XREF.equals(stm.get(PdfName.TYPE)))
- return false;
- }
- if (trailer == null) {
- trailer = new PdfDictionary();
- trailer.putAll(stm);
- }
- stm.setLength(((PdfNumber)stm.get(PdfName.LENGTH)).intValue());
- int size = ((PdfNumber)stm.get(PdfName.SIZE)).intValue();
- PdfArray index;
- PdfObject obj = stm.get(PdfName.INDEX);
- if (obj == null) {
- index = new PdfArray();
- index.add(new int[]{0, size});
- }
- else
- index = (PdfArray)obj;
- PdfArray w = (PdfArray)stm.get(PdfName.W);
- int prev = -1;
- obj = stm.get(PdfName.PREV);
- if (obj != null)
- prev = ((PdfNumber)obj).intValue();
- // Each xref pair is a position
- // type 0 -> -1, 0
- // type 1 -> offset, 0
- // type 2 -> index, obj num
- ensureXrefSize(size * 2);
- if (objStmMark == null && !partial)
- objStmMark = new HashMap();
- if (objStmToOffset == null && partial)
- objStmToOffset = new IntHashtable();
- byte b[] = getStreamBytes(stm, tokens.getFile());
- int bptr = 0;
- ArrayList wa = w.getArrayList();
- int wc[] = new int[3];
- for (int k = 0; k < 3; ++k)
- wc[k] = ((PdfNumber)wa.get(k)).intValue();
- ArrayList sections = index.getArrayList();
- for (int idx = 0; idx < sections.size(); idx += 2) {
- int start = ((PdfNumber)sections.get(idx)).intValue();
- int length = ((PdfNumber)sections.get(idx + 1)).intValue();
- ensureXrefSize((start + length) * 2);
- while (length-- > 0) {
- int type = 1;
- if (wc[0] > 0) {
- type = 0;
- for (int k = 0; k < wc[0]; ++k)
- type = (type << 8) + (b[bptr++] & 0xff);
- }
- int field2 = 0;
- for (int k = 0; k < wc[1]; ++k)
- field2 = (field2 << 8) + (b[bptr++] & 0xff);
- int field3 = 0;
- for (int k = 0; k < wc[2]; ++k)
- field3 = (field3 << 8) + (b[bptr++] & 0xff);
- int base = start * 2;
- if (xref[base] == 0 && xref[base + 1] == 0) {
- switch (type) {
- case 0:
- xref[base] = -1;
- break;
- case 1:
- xref[base] = field2;
- break;
- case 2:
- xref[base] = field3;
- xref[base + 1] = field2;
- if (partial) {
- objStmToOffset.put(field2, 0);
- }
- else {
- Integer on = new Integer(field2);
- IntHashtable seq = (IntHashtable)objStmMark.get(on);
- if (seq == null) {
- seq = new IntHashtable();
- seq.put(field3, 1);
- objStmMark.put(on, seq);
- }
- else
- seq.put(field3, 1);
- }
- break;
- }
- }
- ++start;
- }
- }
- thisStream *= 2;
- if (thisStream < xref.length)
- xref[thisStream] = -1;
-
- if (prev == -1)
- return true;
- return readXRefStream(prev);
- }
-
- protected void rebuildXref() throws IOException {
- hybridXref = false;
- newXrefType = false;
- tokens.seek(0);
- int xr[][] = new int[1024][];
- int top = 0;
- trailer = null;
- byte line[] = new byte[64];
- for (;;) {
- int pos = tokens.getFilePointer();
- if (!tokens.readLineSegment(line))
- break;
- if (line[0] == 't') {
- if (!PdfEncodings.convertToString(line, null).startsWith("trailer"))
- continue;
- tokens.seek(pos);
- tokens.nextToken();
- pos = tokens.getFilePointer();
- try {
- PdfDictionary dic = (PdfDictionary)readPRObject();
- if (dic.get(PdfName.ROOT) != null)
- trailer = dic;
- else
- tokens.seek(pos);
- }
- catch (Exception e) {
- tokens.seek(pos);
- }
- }
- else if (line[0] >= '0' && line[0] <= '9') {
- int obj[] = PRTokeniser.checkObjectStart(line);
- if (obj == null)
- continue;
- int num = obj[0];
- int gen = obj[1];
- if (num >= xr.length) {
- int newLength = num * 2;
- int xr2[][] = new int[newLength][];
- System.arraycopy(xr, 0, xr2, 0, top);
- xr = xr2;
- }
- if (num >= top)
- top = num + 1;
- if (xr[num] == null || gen >= xr[num][1]) {
- obj[0] = pos;
- xr[num] = obj;
- }
- }
- }
- if (trailer == null)
- throw new IOException("trailer not found.");
- xref = new int[top * 2];
- for (int k = 0; k < top; ++k) {
- int obj[] = xr[k];
- if (obj != null)
- xref[k * 2] = obj[0];
- }
- }
-
- protected PdfDictionary readDictionary() throws IOException {
- PdfDictionary dic = new PdfDictionary();
- while (true) {
- tokens.nextValidToken();
- if (tokens.getTokenType() == PRTokeniser.TK_END_DIC)
- break;
- if (tokens.getTokenType() != PRTokeniser.TK_NAME)
- tokens.throwError("Dictionary key is not a name.");
- PdfName name = new PdfName(tokens.getStringValue(), false);
- PdfObject obj = readPRObject();
- int type = obj.type();
- if (-type == PRTokeniser.TK_END_DIC)
- tokens.throwError("Unexpected '>>'");
- if (-type == PRTokeniser.TK_END_ARRAY)
- tokens.throwError("Unexpected ']'");
- dic.put(name, obj);
- }
- return dic;
- }
-
- protected PdfArray readArray() throws IOException {
- PdfArray array = new PdfArray();
- while (true) {
- PdfObject obj = readPRObject();
- int type = obj.type();
- if (-type == PRTokeniser.TK_END_ARRAY)
- break;
- if (-type == PRTokeniser.TK_END_DIC)
- tokens.throwError("Unexpected '>>'");
- array.add(obj);
- }
- return array;
- }
-
- protected PdfObject readPRObject() throws IOException {
- tokens.nextValidToken();
- int type = tokens.getTokenType();
- switch (type) {
- case PRTokeniser.TK_START_DIC: {
- PdfDictionary dic = readDictionary();
- int pos = tokens.getFilePointer();
- // be careful in the trailer. May not be a "next" token.
- if (tokens.nextToken() && tokens.getStringValue().equals("stream")) {
- int ch = tokens.read();
- if (ch != '\n')
- ch = tokens.read();
- if (ch != '\n')
- tokens.backOnePosition(ch);
- PRStream stream = new PRStream(this, tokens.getFilePointer());
- stream.putAll(dic);
- stream.setObjNum(objNum, objGen);
- return stream;
- }
- else {
- tokens.seek(pos);
- return dic;
- }
- }
- case PRTokeniser.TK_START_ARRAY:
- return readArray();
- case PRTokeniser.TK_NUMBER:
- return new PdfNumber(tokens.getStringValue());
- case PRTokeniser.TK_STRING:
- PdfString str = new PdfString(tokens.getStringValue(), null).setHexWriting(tokens.isHexString());
- str.setObjNum(objNum, objGen);
- if (strings != null)
- strings.add(str);
- return str;
- case PRTokeniser.TK_NAME:
- return new PdfName(tokens.getStringValue(), false);
- case PRTokeniser.TK_REF:
- int num = tokens.getReference();
- PRIndirectReference ref = new PRIndirectReference(this, num, tokens.getGeneration());
- if (visited != null && !visited[num]) {
- visited[num] = true;
- newHits.put(num, 1);
- }
- return ref;
- default:
- return new PdfLiteral(-type, tokens.getStringValue());
- }
- }
-
- /** Decodes a stream that has the FlateDecode filter.
- * @param in the input data
- * @return the decoded data
- */
- public static byte[] FlateDecode(byte in[]) {
- byte b[] = FlateDecode(in, true);
- if (b == null)
- return FlateDecode(in, false);
- return b;
- }
-
- /**
- * @param in
- * @param dicPar
- * @return a byte array
- */
- public static byte[] decodePredictor(byte in[], PdfObject dicPar) {
- if (dicPar == null || !dicPar.isDictionary())
- return in;
- PdfDictionary dic = (PdfDictionary)dicPar;
- PdfObject obj = getPdfObject(dic.get(PdfName.PREDICTOR));
- if (obj == null || !obj.isNumber())
- return in;
- int predictor = ((PdfNumber)obj).intValue();
- if (predictor < 10)
- return in;
- int width = 1;
- obj = getPdfObject(dic.get(PdfName.COLUMNS));
- if (obj != null && obj.isNumber())
- width = ((PdfNumber)obj).intValue();
- int colors = 1;
- obj = getPdfObject(dic.get(PdfName.COLORS));
- if (obj != null && obj.isNumber())
- colors = ((PdfNumber)obj).intValue();
- int bpc = 8;
- obj = getPdfObject(dic.get(PdfName.BITSPERCOMPONENT));
- if (obj != null && obj.isNumber())
- bpc = ((PdfNumber)obj).intValue();
- DataInputStream dataStream = new DataInputStream(new ByteArrayInputStream(in));
- ByteArrayOutputStream fout = new ByteArrayOutputStream(in.length);
- int bytesPerPixel = colors * bpc / 8;
- int bytesPerRow = (colors*width*bpc + 7)/8;
- byte[] curr = new byte[bytesPerRow];
- byte[] prior = new byte[bytesPerRow];
-
- // Decode the (sub)image row-by-row
- while (true) {
- // Read the filter type byte and a row of data
- int filter = 0;
- try {
- filter = dataStream.read();
- if (filter < 0) {
- return fout.toByteArray();
- }
- dataStream.readFully(curr, 0, bytesPerRow);
- } catch (Exception e) {
- return fout.toByteArray();
- }
-
- switch (filter) {
- case 0: //PNG_FILTER_NONE
- break;
- case 1: //PNG_FILTER_SUB
- for (int i = bytesPerPixel; i < bytesPerRow; i++) {
- curr[i] += curr[i - bytesPerPixel];
- }
- break;
- case 2: //PNG_FILTER_UP
- for (int i = 0; i < bytesPerRow; i++) {
- curr[i] += prior[i];
- }
- break;
- case 3: //PNG_FILTER_AVERAGE
- for (int i = 0; i < bytesPerPixel; i++) {
- curr[i] += prior[i] / 2;
- }
- for (int i = bytesPerPixel; i < bytesPerRow; i++) {
- curr[i] += ((curr[i - bytesPerPixel] & 0xff) + (prior[i] & 0xff))/2;
- }
- break;
- case 4: //PNG_FILTER_PAETH
- for (int i = 0; i < bytesPerPixel; i++) {
- curr[i] += prior[i];
- }
-
- for (int i = bytesPerPixel; i < bytesPerRow; i++) {
- int a = curr[i - bytesPerPixel] & 0xff;
- int b = prior[i] & 0xff;
- int c = prior[i - bytesPerPixel] & 0xff;
-
- int p = a + b - c;
- int pa = Math.abs(p - a);
- int pb = Math.abs(p - b);
- int pc = Math.abs(p - c);
-
- int ret;
-
- if ((pa <= pb) && (pa <= pc)) {
- ret = a;
- } else if (pb <= pc) {
- ret = b;
- } else {
- ret = c;
- }
- curr[i] += (byte)(ret);
- }
- break;
- default:
- // Error -- uknown filter type
- throw new RuntimeException("PNG filter unknown.");
- }
- try {
- fout.write(curr);
- }
- catch (IOException ioe) {
- // Never happens
- }
-
- // Swap curr and prior
- byte[] tmp = prior;
- prior = curr;
- curr = tmp;
- }
- }
-
- /** A helper to FlateDecode.
- * @param in the input data
- * @param strict <CODE>true</CODE> to read a correct stream. <CODE>false</CODE>
- * to try to read a corrupted stream
- * @return the decoded data
- */
- public static byte[] FlateDecode(byte in[], boolean strict) {
- ByteArrayInputStream stream = new ByteArrayInputStream(in);
- InflaterInputStream zip = new InflaterInputStream(stream);
- ByteArrayOutputStream out = new ByteArrayOutputStream();
- byte b[] = new byte[strict ? 4092 : 1];
- try {
- int n;
- while ((n = zip.read(b)) >= 0) {
- out.write(b, 0, n);
- }
- zip.close();
- out.close();
- return out.toByteArray();
- }
- catch (Exception e) {
- if (strict)
- return null;
- return out.toByteArray();
- }
- }
-
- /** Decodes a stream that has the ASCIIHexDecode filter.
- * @param in the input data
- * @return the decoded data
- */
- public static byte[] ASCIIHexDecode(byte in[]) {
- ByteArrayOutputStream out = new ByteArrayOutputStream();
- boolean first = true;
- int n1 = 0;
- for (int k = 0; k < in.length; ++k) {
- int ch = in[k] & 0xff;
- if (ch == '>')
- break;
- if (PRTokeniser.isWhitespace(ch))
- continue;
- int n = PRTokeniser.getHex(ch);
- if (n == -1)
- throw new RuntimeException("Illegal character in ASCIIHexDecode.");
- if (first)
- n1 = n;
- else
- out.write((byte)((n1 << 4) + n));
- first = !first;
- }
- if (!first)
- out.write((byte)(n1 << 4));
- return out.toByteArray();
- }
-
- /** Decodes a stream that has the ASCII85Decode filter.
- * @param in the input data
- * @return the decoded data
- */
- public static byte[] ASCII85Decode(byte in[]) {
- ByteArrayOutputStream out = new ByteArrayOutputStream();
- int state = 0;
- int chn[] = new int[5];
- for (int k = 0; k < in.length; ++k) {
- int ch = in[k] & 0xff;
- if (ch == '~')
- break;
- if (PRTokeniser.isWhitespace(ch))
- continue;
- if (ch == 'z' && state == 0) {
- out.write(0);
- out.write(0);
- out.write(0);
- out.write(0);
- continue;
- }
- if (ch < '!' || ch > 'u')
- throw new RuntimeException("Illegal character in ASCII85Decode.");
- chn[state] = ch - '!';
- ++state;
- if (state == 5) {
- state = 0;
- int r = 0;
- for (int j = 0; j < 5; ++j)
- r = r * 85 + chn[j];
- out.write((byte)(r >> 24));
- out.write((byte)(r >> 16));
- out.write((byte)(r >> 8));
- out.write((byte)r);
- }
- }
- int r = 0;
- if (state == 1)
- throw new RuntimeException("Illegal length in ASCII85Decode.");
- if (state == 2) {
- r = chn[0] * 85 * 85 * 85 * 85 + chn[1] * 85 * 85 * 85;
- out.write((byte)(r >> 24));
- }
- else if (state == 3) {
- r = chn[0] * 85 * 85 * 85 * 85 + chn[1] * 85 * 85 * 85 + chn[2] * 85 * 85;
- out.write((byte)(r >> 24));
- out.write((byte)(r >> 16));
- }
- else if (state == 4) {
- r = chn[0] * 85 * 85 * 85 * 85 + chn[1] * 85 * 85 * 85 + chn[2] * 85 * 85 + chn[3] * 85 ;
- out.write((byte)(r >> 24));
- out.write((byte)(r >> 16));
- out.write((byte)(r >> 8));
- }
- return out.toByteArray();
- }
-
- /** Decodes a stream that has the LZWDecode filter.
- * @param in the input data
- * @return the decoded data
- */
- public static byte[] LZWDecode(byte in[]) {
- ByteArrayOutputStream out = new ByteArrayOutputStream();
- LZWDecoder lzw = new LZWDecoder();
- lzw.decode(in, out);
- return out.toByteArray();
- }
-
- /** Checks if the document had errors and was rebuilt.
- * @return true if rebuilt.
- *
- */
- public boolean isRebuilt() {
- return this.rebuilt;
- }
-
- /** Gets the dictionary that represents a page.
- * @param pageNum the page number. 1 is the first
- * @return the page dictionary
- */
- public PdfDictionary getPageN(int pageNum) {
- PdfDictionary dic = pageRefs.getPageN(pageNum);
- if (dic == null)
- return null;
- if (appendable)
- dic.setIndRef(pageRefs.getPageOrigRef(pageNum));
- return dic;
- }
-
- /**
- * @param pageNum
- * @return a Dictionary object
- */
- public PdfDictionary getPageNRelease(int pageNum) {
- PdfDictionary dic = getPageN(pageNum);
- pageRefs.releasePage(pageNum);
- return dic;
- }
-
- /**
- * @param pageNum
- */
- public void releasePage(int pageNum) {
- pageRefs.releasePage(pageNum);
- }
-
- /**
- *
- */
- public void resetReleasePage() {
- pageRefs.resetReleasePage();
- }
-
- /** Gets the page reference to this page.
- * @param pageNum the page number. 1 is the first
- * @return the page reference
- */
- public PRIndirectReference getPageOrigRef(int pageNum) {
- return pageRefs.getPageOrigRef(pageNum);
- }
-
- /** Gets the contents of the page.
- * @param pageNum the page number. 1 is the first
- * @param file the location of the PDF document
- * @throws IOException on error
- * @return the content
- */
- public byte[] getPageContent(int pageNum, RandomAccessFileOrArray file) throws IOException{
- PdfDictionary page = getPageNRelease(pageNum);
- if (page == null)
- return null;
- PdfObject contents = getPdfObjectRelease(page.get(PdfName.CONTENTS));
- if (contents == null)
- return new byte[0];
- ByteArrayOutputStream bout = null;
- if (contents.isStream()) {
- return getStreamBytes((PRStream)contents, file);
- }
- else if (contents.isArray()) {
- PdfArray array = (PdfArray)contents;
- ArrayList list = array.getArrayList();
- bout = new ByteArrayOutputStream();
- for (int k = 0; k < list.size(); ++k) {
- PdfObject item = getPdfObjectRelease((PdfObject)list.get(k));
- if (item == null || !item.isStream())
- continue;
- byte[] b = getStreamBytes((PRStream)item, file);
- bout.write(b);
- if (k != list.size() - 1)
- bout.write('\n');
- }
- return bout.toByteArray();
- }
- else
- return new byte[0];
- }
-
- /** Gets the contents of the page.
- * @param pageNum the page number. 1 is the first
- * @throws IOException on error
- * @return the content
- */
- public byte[] getPageContent(int pageNum) throws IOException{
- RandomAccessFileOrArray rf = getSafeFile();
- try {
- rf.reOpen();
- return getPageContent(pageNum, rf);
- }
- finally {
- try{rf.close();}catch(Exception e){}
- }
- }
-
- protected void killXref(PdfObject obj) {
- if (obj == null)
- return;
- if ((obj instanceof PdfIndirectReference) && !obj.isIndirect())
- return;
- switch (obj.type()) {
- case PdfObject.INDIRECT: {
- int xr = ((PRIndirectReference)obj).getNumber();
- obj = (PdfObject)xrefObj.get(xr);
- xrefObj.set(xr, null);
- freeXref = xr;
- killXref(obj);
- break;
- }
- case PdfObject.ARRAY: {
- ArrayList t = ((PdfArray)obj).getArrayList();
- for (int i = 0; i < t.size(); ++i)
- killXref((PdfObject)t.get(i));
- break;
- }
- case PdfObject.STREAM:
- case PdfObject.DICTIONARY: {
- PdfDictionary dic = (PdfDictionary)obj;
- for (Iterator i = dic.getKeys().iterator(); i.hasNext();){
- killXref(dic.get((PdfName)i.next()));
- }
- break;
- }
- }
- }
-
- /** Sets the contents of the page.
- * @param content the new page content
- * @param pageNum the page number. 1 is the first
- * @throws IOException on error
- */
- public void setPageContent(int pageNum, byte content[]) throws IOException{
- PdfDictionary page = getPageN(pageNum);
- if (page == null)
- return;
- PdfObject contents = page.get(PdfName.CONTENTS);
- freeXref = -1;
- killXref(contents);
- if (freeXref == -1) {
- xrefObj.add(null);
- freeXref = xrefObj.size() - 1;
- }
- page.put(PdfName.CONTENTS, new PRIndirectReference(this, freeXref));
- xrefObj.set(freeXref, new PRStream(this, content));
- }
-
- /** Get the content from a stream applying the required filters.
- * @param stream the stream
- * @param file the location where the stream is
- * @throws IOException on error
- * @return the stream content
- */
- public static byte[] getStreamBytes(PRStream stream, RandomAccessFileOrArray file) throws IOException {
- PdfObject filter = getPdfObjectRelease(stream.get(PdfName.FILTER));
- byte[] b = getStreamBytesRaw(stream, file);
- ArrayList filters = new ArrayList();
- if (filter != null) {
- if (filter.isName())
- filters.add(filter);
- else if (filter.isArray())
- filters = ((PdfArray)filter).getArrayList();
- }
- ArrayList dp = new ArrayList();
- PdfObject dpo = getPdfObjectRelease(stream.get(PdfName.DECODEPARMS));
- if (dpo == null || (!dpo.isDictionary() && !dpo.isArray()))
- dpo = getPdfObjectRelease(stream.get(PdfName.DP));
- if (dpo != null) {
- if (dpo.isDictionary())
- dp.add(dpo);
- else if (dpo.isArray())
- dp = ((PdfArray)dpo).getArrayList();
- }
- String name;
- for (int j = 0; j < filters.size(); ++j) {
- name = ((PdfName)PdfReader.getPdfObjectRelease((PdfObject)filters.get(j))).toString();
- if (name.equals("/FlateDecode") || name.equals("/Fl")) {
- b = PdfReader.FlateDecode(b);
- PdfObject dicParam = null;
- if (j < dp.size()) {
- dicParam = (PdfObject)dp.get(j);
- b = decodePredictor(b, dicParam);
- }
- }
- else if (name.equals("/ASCIIHexDecode") || name.equals("/AHx"))
- b = PdfReader.ASCIIHexDecode(b);
- else if (name.equals("/ASCII85Decode") || name.equals("/A85"))
- b = PdfReader.ASCII85Decode(b);
- else if (name.equals("/LZWDecode")) {
- b = PdfReader.LZWDecode(b);
- PdfObject dicParam = null;
- if (j < dp.size()) {
- dicParam = (PdfObject)dp.get(j);
- b = decodePredictor(b, dicParam);
- }
- }
- else
- throw new IOException("The filter " + name + " is not supported.");
- }
- return b;
- }
-
- /** Get the content from a stream applying the required filters.
- * @param stream the stream
- * @throws IOException on error
- * @return the stream content
- */
- public static byte[] getStreamBytes(PRStream stream) throws IOException {
- RandomAccessFileOrArray rf = stream.getReader().getSafeFile();
- try {
- rf.reOpen();
- return PdfReader.getStreamBytes(stream, rf);
- }
- finally {
- try{rf.close();}catch(Exception e){}
- }
- }
-
- /** Get the content from a stream as it is without applying any filter.
- * @param stream the stream
- * @param file the location where the stream is
- * @throws IOException on error
- * @return the stream content
- */
- public static byte[] getStreamBytesRaw(PRStream stream, RandomAccessFileOrArray file) throws IOException {
- PdfReader reader = stream.getReader();
- byte b[];
- if (stream.getOffset() < 0)
- b = stream.getBytes();
- else {
- b = new byte[stream.getLength()];
- file.seek(stream.getOffset());
- file.readFully(b);
- PdfEncryption decrypt = reader.getDecrypt();
- if (decrypt != null) {
- decrypt.setHashKey(stream.getObjNum(), stream.getObjGen());
- decrypt.prepareKey();
- decrypt.encryptRC4(b);
- }
- }
- return b;
- }
-
- /** Get the content from a stream as it is without applying any filter.
- * @param stream the stream
- * @throws IOException on error
- * @return the stream content
- */
- public static byte[] getStreamBytesRaw(PRStream stream) throws IOException {
- RandomAccessFileOrArray rf = stream.getReader().getSafeFile();
- try {
- rf.reOpen();
- return PdfReader.getStreamBytesRaw(stream, rf);
- }
- finally {
- try{rf.close();}catch(Exception e){}
- }
- }
-
- /** Eliminates shared streams if they exist. */
- public void eliminateSharedStreams() {
- if (!sharedStreams)
- return;
- sharedStreams = false;
- if (pageRefs.size() == 1)
- return;
- ArrayList newRefs = new ArrayList();
- ArrayList newStreams = new ArrayList();
- IntHashtable visited = new IntHashtable();
- for (int k = 1; k <= pageRefs.size(); ++k) {
- PdfDictionary page = pageRefs.getPageN(k);
- if (page == null)
- continue;
- PdfObject contents = getPdfObject(page.get(PdfName.CONTENTS));
- if (contents == null)
- continue;
- if (contents.isStream()) {
- PRIndirectReference ref = (PRIndirectReference)page.get(PdfName.CONTENTS);
- if (visited.containsKey(ref.getNumber())) {
- // need to duplicate
- newRefs.add(ref);
- newStreams.add(new PRStream((PRStream)contents, null));
- }
- else
- visited.put(ref.getNumber(), 1);
- }
- else if (contents.isArray()) {
- PdfArray array = (PdfArray)contents;
- ArrayList list = array.getArrayList();
- for (int j = 0; j < list.size(); ++j) {
- PRIndirectReference ref = (PRIndirectReference)list.get(j);
- if (visited.containsKey(ref.getNumber())) {
- // need to duplicate
- newRefs.add(ref);
- newStreams.add(new PRStream((PRStream)getPdfObject(ref), null));
- }
- else
- visited.put(ref.getNumber(), 1);
- }
- }
- }
- if (newStreams.size() == 0)
- return;
- for (int k = 0; k < newStreams.size(); ++k) {
- xrefObj.add(newStreams.get(k));
- PRIndirectReference ref = (PRIndirectReference)newRefs.get(k);
- ref.setNumber(xrefObj.size() - 1, 0);
- }
- }
-
- /** Checks if the document was changed.
- * @return <CODE>true</CODE> if the document was changed,
- * <CODE>false</CODE> otherwise
- */
- public boolean isTampered() {
- return tampered;
- }
-
- /**
- * Sets the tampered state. A tampered PdfReader cannot be reused in PdfStamper.
- * @param tampered the tampered state
- */
- public void setTampered(boolean tampered) {
- this.tampered = tampered;
- }
-
- /** Gets the XML metadata.
- * @throws IOException on error
- * @return the XML metadata
- */
- public byte[] getMetadata() throws IOException {
- PdfObject obj = getPdfObject(catalog.get(PdfName.METADATA));
- if (!(obj instanceof PRStream))
- return null;
- RandomAccessFileOrArray rf = getSafeFile();
- byte b[] = null;
- try {
- rf.reOpen();
- b = getStreamBytes((PRStream)obj, rf);
- }
- finally {
- try {
- rf.close();
- }
- catch (Exception e) {
- // empty on purpose
- }
- }
- return b;
- }
-
- /**
- * Gets the byte address of the last xref table.
- * @return the byte address of the last xref table
- */
- public int getLastXref() {
- return lastXref;
- }
-
- /**
- * Gets the number of xref objects.
- * @return the number of xref objects
- */
- public int getXrefSize() {
- return xrefObj.size();
- }
-
- /**
- * Gets the byte address of the %%EOF marker.
- * @return the byte address of the %%EOF marker
- */
- public int getEofPos() {
- return eofPos;
- }
-
- /**
- * Gets the PDF version. Only the last version char is returned. For example
- * version 1.4 is returned as '4'.
- * @return the PDF version
- */
- public char getPdfVersion() {
- return pdfVersion;
- }
-
- /**
- * Returns <CODE>true</CODE> if the PDF is encrypted.
- * @return <CODE>true</CODE> if the PDF is encrypted
- */
- public boolean isEncrypted() {
- return encrypted;
- }
-
- /**
- * Gets the encryption permissions. It can be used directly in
- * <CODE>PdfWriter.setEncryption()</CODE>.
- * @return the encryption permissions
- */
- public int getPermissions() {
- return pValue;
- }
-
- /**
- * Returns <CODE>true</CODE> if the PDF has a 128 bit key encryption.
- * @return <CODE>true</CODE> if the PDF has a 128 bit key encryption
- */
- public boolean is128Key() {
- return rValue == 3;
- }
-
- /**
- * Gets the trailer dictionary
- * @return the trailer dictionary
- */
- public PdfDictionary getTrailer() {
- return trailer;
- }
-
- PdfEncryption getDecrypt() {
- return decrypt;
- }
-
- static boolean equalsn(byte a1[], byte a2[]) {
- int length = a2.length;
- for (int k = 0; k < length; ++k) {
- if (a1[k] != a2[k])
- return false;
- }
- return true;
- }
-
- static boolean existsName(PdfDictionary dic, PdfName key, PdfName value) {
- PdfObject type = getPdfObjectRelease(dic.get(key));
- if (type == null || !type.isName())
- return false;
- PdfName name = (PdfName)type;
- return name.equals(value);
- }
-
- static String getFontName(PdfDictionary dic) {
- PdfObject type = getPdfObjectRelease(dic.get(PdfName.BASEFONT));
- if (type == null || !type.isName())
- return null;
- return PdfName.decodeName(type.toString());
- }
-
- static String getSubsetPrefix(PdfDictionary dic) {
- String s = getFontName(dic);
- if (s == null)
- return null;
- if (s.length() < 8 || s.charAt(6) != '+')
- return null;
- for (int k = 0; k < 6; ++k) {
- char c = s.charAt(k);
- if (c < 'A' || c > 'Z')
- return null;
- }
- return s;
- }
-
- /** Finds all the font subsets and changes the prefixes to some
- * random values.
- * @return the number of font subsets altered
- */
- public int shuffleSubsetNames() {
- int total = 0;
- for (int k = 1; k < xrefObj.size(); ++k) {
- PdfObject obj = getPdfObjectRelease(k);
- if (obj == null || !obj.isDictionary())
- continue;
- PdfDictionary dic = (PdfDictionary)obj;
- if (!existsName(dic, PdfName.TYPE, PdfName.FONT))
- continue;
- if (existsName(dic, PdfName.SUBTYPE, PdfName.TYPE1)
- || existsName(dic, PdfName.SUBTYPE, PdfName.MMTYPE1)
- || existsName(dic, PdfName.SUBTYPE, PdfName.TRUETYPE)) {
- String s = getSubsetPrefix(dic);
- if (s == null)
- continue;
- String ns = BaseFont.createSubsetPrefix() + s.substring(7);
- PdfName newName = new PdfName(ns);
- dic.put(PdfName.BASEFONT, newName);
- setXrefPartialObject(k, dic);
- ++total;
- PdfDictionary fd = (PdfDictionary)getPdfObject(dic.get(PdfName.FONTDESCRIPTOR));
- if (fd == null)
- continue;
- fd.put(PdfName.FONTNAME, newName);
- }
- else if (existsName(dic, PdfName.SUBTYPE, PdfName.TYPE0)) {
- String s = getSubsetPrefix(dic);
- PdfArray arr = (PdfArray)getPdfObject(dic.get(PdfName.DESCENDANTFONTS));
- if (arr == null)
- continue;
- ArrayList list = arr.getArrayList();
- if (list.size() == 0)
- continue;
- PdfDictionary desc = (PdfDictionary)getPdfObject((PdfObject)list.get(0));
- String sde = getSubsetPrefix(desc);
- if (sde == null)
- continue;
- String ns = BaseFont.createSubsetPrefix();
- if (s != null)
- dic.put(PdfName.BASEFONT, new PdfName(ns + s.substring(7)));
- setXrefPartialObject(k, dic);
- PdfName newName = new PdfName(ns + sde.substring(7));
- desc.put(PdfName.BASEFONT, newName);
- ++total;
- PdfDictionary fd = (PdfDictionary)getPdfObject(desc.get(PdfName.FONTDESCRIPTOR));
- if (fd == null)
- continue;
- fd.put(PdfName.FONTNAME, newName);
- }
- }
- return total;
- }
-
- /** Finds all the fonts not subset but embedded and marks them as subset.
- * @return the number of fonts altered
- */
- public int createFakeFontSubsets() {
- int total = 0;
- for (int k = 1; k < xrefObj.size(); ++k) {
- PdfObject obj = getPdfObjectRelease(k);
- if (obj == null || !obj.isDictionary())
- continue;
- PdfDictionary dic = (PdfDictionary)obj;
- if (!existsName(dic, PdfName.TYPE, PdfName.FONT))
- continue;
- if (existsName(dic, PdfName.SUBTYPE, PdfName.TYPE1)
- || existsName(dic, PdfName.SUBTYPE, PdfName.MMTYPE1)
- || existsName(dic, PdfName.SUBTYPE, PdfName.TRUETYPE)) {
- String s = getSubsetPrefix(dic);
- if (s != null)
- continue;
- s = getFontName(dic);
- if (s == null)
- continue;
- String ns = BaseFont.createSubsetPrefix() + s;
- PdfDictionary fd = (PdfDictionary)getPdfObjectRelease(dic.get(PdfName.FONTDESCRIPTOR));
- if (fd == null)
- continue;
- if (fd.get(PdfName.FONTFILE) == null && fd.get(PdfName.FONTFILE2) == null
- && fd.get(PdfName.FONTFILE3) == null)
- continue;
- fd = (PdfDictionary)getPdfObject(dic.get(PdfName.FONTDESCRIPTOR));
- PdfName newName = new PdfName(ns);
- dic.put(PdfName.BASEFONT, newName);
- fd.put(PdfName.FONTNAME, newName);
- setXrefPartialObject(k, dic);
- ++total;
- }
- }
- return total;
- }
-
- private static PdfArray getNameArray(PdfObject obj) {
- if (obj == null)
- return null;
- obj = getPdfObjectRelease(obj);
- if (obj.isArray())
- return (PdfArray)obj;
- else if (obj.isDictionary()) {
- PdfObject arr2 = getPdfObjectRelease(((PdfDictionary)obj).get(PdfName.D));
- if (arr2 != null && arr2.isArray())
- return (PdfArray)arr2;
- }
- return null;
- }
-
- /**
- * Gets all the named destinations as an <CODE>HashMap</CODE>. The key is the name
- * and the value is the destinations array.
- * @return gets all the named destinations
- */
- public HashMap getNamedDestination() {
- HashMap names = getNamedDestinationFromNames();
- names.putAll(getNamedDestinationFromStrings());
- return names;
- }
-
- /**
- * Gets the named destinations from the /Dests key in the catalog as an <CODE>HashMap</CODE>. The key is the name
- * and the value is the destinations array.
- * @return gets the named destinations
- */
- public HashMap getNamedDestinationFromNames() {
- HashMap names = new HashMap();
- if (catalog.get(PdfName.DESTS) != null) {
- PdfDictionary dic = (PdfDictionary)getPdfObjectRelease(catalog.get(PdfName.DESTS));
- Set keys = dic.getKeys();
- for (Iterator it = keys.iterator(); it.hasNext();) {
- PdfName key = (PdfName)it.next();
- String name = PdfName.decodeName(key.toString());
- PdfArray arr = getNameArray(dic.get(key));
- if (arr != null)
- names.put(name, arr);
- }
- }
- return names;
- }
-
- /**
- * Gets the named destinations from the /Names key in the catalog as an <CODE>HashMap</CODE>. The key is the name
- * and the value is the destinations array.
- * @return gets the named destinations
- */
- public HashMap getNamedDestinationFromStrings() {
- if (catalog.get(PdfName.NAMES) != null) {
- PdfDictionary dic = (PdfDictionary)getPdfObjectRelease(catalog.get(PdfName.NAMES));
- dic = (PdfDictionary)getPdfObjectRelease(dic.get(PdfName.DESTS));
- if (dic != null) {
- HashMap names = PdfNameTree.readTree(dic);
- for (Iterator it = names.entrySet().iterator(); it.hasNext();) {
- Map.Entry entry = (Map.Entry)it.next();
- PdfArray arr = getNameArray((PdfObject)entry.getValue());
- if (arr != null)
- entry.setValue(arr);
- else
- it.remove();
- }
- return names;
- }
- }
- return new HashMap();
- }
-
- private boolean replaceNamedDestination(PdfObject obj, HashMap names) {
- obj = getPdfObject(obj);
- int objIdx = lastXrefPartial;
- releaseLastXrefPartial();
- if (obj != null && obj.isDictionary()) {
- PdfObject ob2 = getPdfObjectRelease(((PdfDictionary)obj).get(PdfName.DEST));
- String name = null;
- if (ob2 != null) {
- if (ob2.isName())
- name = PdfName.decodeName(ob2.toString());
- else if (ob2.isString())
- name = ob2.toString();
- PdfArray dest = (PdfArray)names.get(name);
- if (dest != null) {
- ((PdfDictionary)obj).put(PdfName.DEST, dest);
- setXrefPartialObject(objIdx, obj);
- return true;
- }
- }
- else if ((ob2 = getPdfObject(((PdfDictionary)obj).get(PdfName.A))) != null) {
- int obj2Idx = lastXrefPartial;
- releaseLastXrefPartial();
- PdfDictionary dic = (PdfDictionary)ob2;
- PdfName type = (PdfName)getPdfObjectRelease(dic.get(PdfName.S));
- if (PdfName.GOTO.equals(type)) {
- PdfObject ob3 = getPdfObjectRelease(dic.get(PdfName.D));
- if (ob3.isName())
- name = PdfName.decodeName(ob3.toString());
- else if (ob3.isString())
- name = ob3.toString();
- PdfArray dest = (PdfArray)names.get(name);
- if (dest != null) {
- dic.put(PdfName.D, dest);
- setXrefPartialObject(obj2Idx, ob2);
- setXrefPartialObject(objIdx, obj);
- return true;
- }
- }
- }
- }
- return false;
- }
-
- /**
- * Removes all the fields from the document.
- */
- public void removeFields() {
- pageRefs.resetReleasePage();
- for (int k = 1; k <= pageRefs.size(); ++k) {
- PdfDictionary page = pageRefs.getPageN(k);
- PdfArray annots = (PdfArray)getPdfObject(page.get(PdfName.ANNOTS));
- if (annots == null) {
- pageRefs.releasePage(k);
- continue;
- }
- ArrayList arr = annots.getArrayList();
- for (int j = 0; j < arr.size(); ++j) {
- PdfDictionary annot = (PdfDictionary)getPdfObjectRelease((PdfObject)arr.get(j));
- if (PdfName.WIDGET.equals(annot.get(PdfName.SUBTYPE)))
- arr.remove(j--);
- }
- if (arr.isEmpty())
- page.remove(PdfName.ANNOTS);
- else
- pageRefs.releasePage(k);
- }
- catalog.remove(PdfName.ACROFORM);
- pageRefs.resetReleasePage();
- }
-
- /**
- * Removes all the annotations and fields from the document.
- */
- public void removeAnnotations() {
- pageRefs.resetReleasePage();
- for (int k = 1; k <= pageRefs.size(); ++k) {
- PdfDictionary page = pageRefs.getPageN(k);
- if (page.get(PdfName.ANNOTS) == null)
- pageRefs.releasePage(k);
- else
- page.remove(PdfName.ANNOTS);
- }
- catalog.remove(PdfName.ACROFORM);
- pageRefs.resetReleasePage();
- }
-
- private void iterateBookmarks(PdfObject outlineRef, HashMap names) {
- while (outlineRef != null) {
- replaceNamedDestination(outlineRef, names);
- PdfDictionary outline = (PdfDictionary)getPdfObjectRelease(outlineRef);
- PdfObject first = outline.get(PdfName.FIRST);
- if (first != null) {
- iterateBookmarks(first, names);
- }
- outlineRef = outline.get(PdfName.NEXT);
- }
- }
-
- /** Replaces all the local named links with the actual destinations. */
- public void consolidateNamedDestinations() {
- if (consolidateNamedDestinations)
- return;
- consolidateNamedDestinations = true;
- HashMap names = getNamedDestination();
- if (names.size() == 0)
- return;
- for (int k = 1; k <= pageRefs.size(); ++k) {
- PdfDictionary page = pageRefs.getPageN(k);
- PdfObject annotsRef;
- PdfArray annots = (PdfArray)getPdfObject(annotsRef = page.get(PdfName.ANNOTS));
- int annotIdx = lastXrefPartial;
- releaseLastXrefPartial();
- if (annots == null) {
- pageRefs.releasePage(k);
- continue;
- }
- ArrayList list = annots.getArrayList();
- boolean commitAnnots = false;
- for (int an = 0; an < list.size(); ++an) {
- PdfObject objRef = (PdfObject)list.get(an);
- if (replaceNamedDestination(objRef, names) && !objRef.isIndirect())
- commitAnnots = true;
- }
- if (commitAnnots)
- setXrefPartialObject(annotIdx, annots);
- if (!commitAnnots || annotsRef.isIndirect())
- pageRefs.releasePage(k);
- }
- PdfDictionary outlines = (PdfDictionary)getPdfObjectRelease(catalog.get(PdfName.OUTLINES));
- if (outlines == null)
- return;
- iterateBookmarks(outlines.get(PdfName.FIRST), names);
- }
-
- protected static PdfDictionary duplicatePdfDictionary(PdfDictionary original, PdfDictionary copy, PdfReader newReader) {
- if (copy == null)
- copy = new PdfDictionary();
- for (Iterator it = original.getKeys().iterator(); it.hasNext();) {
- PdfName key = (PdfName)it.next();
- copy.put(key, duplicatePdfObject(original.get(key), newReader));
- }
- return copy;
- }
-
- protected static PdfObject duplicatePdfObject(PdfObject original, PdfReader newReader) {
- if (original == null)
- return null;
- switch (original.type()) {
- case PdfObject.DICTIONARY: {
- return duplicatePdfDictionary((PdfDictionary)original, null, newReader);
- }
- case PdfObject.STREAM: {
- PRStream org = (PRStream)original;
- PRStream stream = new PRStream(org, null, newReader);
- duplicatePdfDictionary(org, stream, newReader);
- return stream;
- }
- case PdfObject.ARRAY: {
- ArrayList list = ((PdfArray)original).getArrayList();
- PdfArray arr = new PdfArray();
- for (Iterator it = list.iterator(); it.hasNext();) {
- arr.add(duplicatePdfObject((PdfObject)it.next(), newReader));
- }
- return arr;
- }
- case PdfObject.INDIRECT: {
- PRIndirectReference org = (PRIndirectReference)original;
- return new PRIndirectReference(newReader, org.getNumber(), org.getGeneration());
- }
- default:
- return original;
- }
- }
-
- /**
- * Closes the reader
- */
- public void close() {
- if (!partial)
- return;
- try {
- tokens.close();
- }
- catch (IOException e) {
- throw new ExceptionConverter(e);
- }
- }
-
- protected void removeUnusedNode(PdfObject obj, boolean hits[]) {
- if (obj == null)
- return;
- switch (obj.type()) {
- case PdfObject.DICTIONARY:
- case PdfObject.STREAM: {
- PdfDictionary dic = (PdfDictionary)obj;
- for (Iterator it = dic.getKeys().iterator(); it.hasNext();) {
- PdfName key = (PdfName)it.next();
- PdfObject v = dic.get(key);
- if (v.isIndirect()) {
- int num = ((PRIndirectReference)v).getNumber();
- if (num >= xrefObj.size() || (!partial && xrefObj.get(num) == null)) {
- dic.put(key, PdfNull.PDFNULL);
- continue;
- }
- }
- removeUnusedNode(v, hits);
- }
- break;
- }
- case PdfObject.ARRAY: {
- ArrayList list = ((PdfArray)obj).getArrayList();
- for (int k = 0; k < list.size(); ++k) {
- PdfObject v = (PdfObject)list.get(k);
- if (v.isIndirect()) {
- int num = ((PRIndirectReference)v).getNumber();
- if (num >= xrefObj.size() || (!partial && xrefObj.get(num) == null)) {
- list.set(k, PdfNull.PDFNULL);
- continue;
- }
- }
- removeUnusedNode(v, hits);
- }
- break;
- }
- case PdfObject.INDIRECT: {
- PRIndirectReference ref = (PRIndirectReference)obj;
- int num = ref.getNumber();
- if (!hits[num]) {
- hits[num] = true;
- removeUnusedNode(getPdfObjectRelease(ref), hits);
- }
- }
- }
- }
-
- /** Removes all the unreachable objects.
- * @return the number of indirect objects removed
- */
- public int removeUnusedObjects() {
- boolean hits[] = new boolean[xrefObj.size()];
- removeUnusedNode(trailer, hits);
- int total = 0;
- if (partial) {
- for (int k = 1; k < hits.length; ++k) {
- if (!hits[k]) {
- xref[k * 2] = -1;
- xref[k * 2 + 1] = 0;
- xrefObj.set(k, null);
- ++total;
- }
- }
- }
- else {
- for (int k = 1; k < hits.length; ++k) {
- if (!hits[k]) {
- xrefObj.set(k, null);
- ++total;
- }
- }
- }
- return total;
- }
-
- /** Gets a read-only version of <CODE>AcroFields</CODE>.
- * @return a read-only version of <CODE>AcroFields</CODE>
- */
- public AcroFields getAcroFields() {
- return new AcroFields(this, null);
- }
-
- /**
- * Gets the global document JavaScript.
- * @param file the document file
- * @throws IOException on error
- * @return the global document JavaScript
- */
- public String getJavaScript(RandomAccessFileOrArray file) throws IOException {
- PdfDictionary names = (PdfDictionary)getPdfObjectRelease(catalog.get(PdfName.NAMES));
- if (names == null)
- return null;
- PdfDictionary js = (PdfDictionary)getPdfObjectRelease(names.get(PdfName.JAVASCRIPT));
- if (js == null)
- return null;
- HashMap jscript = PdfNameTree.readTree(js);
- String sortedNames[] = new String[jscript.size()];
- sortedNames = (String[])jscript.keySet().toArray(sortedNames);
- Arrays.sort(sortedNames, new StringCompare());
- StringBuffer buf = new StringBuffer();
- for (int k = 0; k < sortedNames.length; ++k) {
- PdfDictionary j = (PdfDictionary)getPdfObjectRelease((PdfIndirectReference)jscript.get(sortedNames[k]));
- if (j == null)
- continue;
- PdfObject obj = getPdfObjectRelease(j.get(PdfName.JS));
- if (obj.isString())
- buf.append(((PdfString)obj).toUnicodeString()).append('\n');
- else if (obj.isStream()) {
- byte bytes[] = getStreamBytes((PRStream)obj, file);
- if (bytes.length >= 2 && bytes[0] == (byte)254 && bytes[1] == (byte)255)
- buf.append(PdfEncodings.convertToString(bytes, PdfObject.TEXT_UNICODE));
- else
- buf.append(PdfEncodings.convertToString(bytes, PdfObject.TEXT_PDFDOCENCODING));
- buf.append('\n');
- }
- }
- return buf.toString();
- }
-
- /**
- * Gets the global document JavaScript.
- * @throws IOException on error
- * @return the global document JavaScript
- */
- public String getJavaScript() throws IOException {
- RandomAccessFileOrArray rf = getSafeFile();
- try {
- rf.reOpen();
- return getJavaScript(rf);
- }
- finally {
- try{rf.close();}catch(Exception e){}
- }
- }
-
- /**
- * Selects the pages to keep in the document. The pages are described as
- * ranges. The page ordering can be changed but
- * no page repetitions are allowed. Note that it may be very slow in partial mode.
- * @param ranges the comma separated ranges as described in {@link SequenceList}
- */
- public void selectPages(String ranges) {
- selectPages(SequenceList.expand(ranges, getNumberOfPages()));
- }
-
- /**
- * Selects the pages to keep in the document. The pages are described as a
- * <CODE>List</CODE> of <CODE>Integer</CODE>. The page ordering can be changed but
- * no page repetitions are allowed. Note that it may be very slow in partial mode.
- * @param pagesToKeep the pages to keep in the document
- */
- public void selectPages(List pagesToKeep) {
- pageRefs.selectPages(pagesToKeep);
- removeUnusedObjects();
- }
-
- /**
- * @param preferences
- * @param catalog
- */
- public static void setViewerPreferences(int preferences, PdfDictionary catalog) {
- catalog.remove(PdfName.PAGELAYOUT);
- catalog.remove(PdfName.PAGEMODE);
- catalog.remove(PdfName.VIEWERPREFERENCES);
- if ((preferences & PdfWriter.PageLayoutSinglePage) != 0)
- catalog.put(PdfName.PAGELAYOUT, PdfName.SINGLEPAGE);
- else if ((preferences & PdfWriter.PageLayoutOneColumn) != 0)
- catalog.put(PdfName.PAGELAYOUT, PdfName.ONECOLUMN);
- else if ((preferences & PdfWriter.PageLayoutTwoColumnLeft) != 0)
- catalog.put(PdfName.PAGELAYOUT, PdfName.TWOCOLUMNLEFT);
- else if ((preferences & PdfWriter.PageLayoutTwoColumnRight) != 0)
- catalog.put(PdfName.PAGELAYOUT, PdfName.TWOCOLUMNRIGHT);
- else if ((preferences & PdfWriter.PageLayoutTwoPageLeft) != 0)
- catalog.put(PdfName.PAGELAYOUT, PdfName.TWOPAGELEFT);
- else if ((preferences & PdfWriter.PageLayoutTwoPageRight) != 0)
- catalog.put(PdfName.PAGELAYOUT, PdfName.TWOPAGERIGHT);
- if ((preferences & PdfWriter.PageModeUseNone) != 0)
- catalog.put(PdfName.PAGEMODE, PdfName.USENONE);
- else if ((preferences & PdfWriter.PageModeUseOutlines) != 0)
- catalog.put(PdfName.PAGEMODE, PdfName.USEOUTLINES);
- else if ((preferences & PdfWriter.PageModeUseThumbs) != 0)
- catalog.put(PdfName.PAGEMODE, PdfName.USETHUMBS);
- else if ((preferences & PdfWriter.PageModeFullScreen) != 0)
- catalog.put(PdfName.PAGEMODE, PdfName.FULLSCREEN);
- else if ((preferences & PdfWriter.PageModeUseOC) != 0)
- catalog.put(PdfName.PAGEMODE, PdfName.USEOC);
- else if ((preferences & PdfWriter.PageModeUseAttachments) != 0)
- catalog.put(PdfName.PAGEMODE, PdfName.USEATTACHMENTS);
- if ((preferences & PdfWriter.ViewerPreferencesMask) == 0)
- return;
- PdfDictionary vp = new PdfDictionary();
- if ((preferences & PdfWriter.HideToolbar) != 0)
- vp.put(PdfName.HIDETOOLBAR, PdfBoolean.PDFTRUE);
- if ((preferences & PdfWriter.HideMenubar) != 0)
- vp.put(PdfName.HIDEMENUBAR, PdfBoolean.PDFTRUE);
- if ((preferences & PdfWriter.HideWindowUI) != 0)
- vp.put(PdfName.HIDEWINDOWUI, PdfBoolean.PDFTRUE);
- if ((preferences & PdfWriter.FitWindow) != 0)
- vp.put(PdfName.FITWINDOW, PdfBoolean.PDFTRUE);
- if ((preferences & PdfWriter.CenterWindow) != 0)
- vp.put(PdfName.CENTERWINDOW, PdfBoolean.PDFTRUE);
- if ((preferences & PdfWriter.DisplayDocTitle) != 0)
- vp.put(PdfName.DISPLAYDOCTITLE, PdfBoolean.PDFTRUE);
- if ((preferences & PdfWriter.NonFullScreenPageModeUseNone) != 0)
- vp.put(PdfName.NONFULLSCREENPAGEMODE, PdfName.USENONE);
- else if ((preferences & PdfWriter.NonFullScreenPageModeUseOutlines) != 0)
- vp.put(PdfName.NONFULLSCREENPAGEMODE, PdfName.USEOUTLINES);
- else if ((preferences & PdfWriter.NonFullScreenPageModeUseThumbs) != 0)
- vp.put(PdfName.NONFULLSCREENPAGEMODE, PdfName.USETHUMBS);
- else if ((preferences & PdfWriter.NonFullScreenPageModeUseOC) != 0)
- vp.put(PdfName.NONFULLSCREENPAGEMODE, PdfName.USEOC);
- if ((preferences & PdfWriter.DirectionL2R) != 0)
- vp.put(PdfName.DIRECTION, PdfName.L2R);
- else if ((preferences & PdfWriter.DirectionR2L) != 0)
- vp.put(PdfName.DIRECTION, PdfName.R2L);
- if ((preferences & PdfWriter.PrintScalingNone) != 0)
- vp.put(PdfName.PRINTSCALING, PdfName.NONE);
- catalog.put(PdfName.VIEWERPREFERENCES, vp);
- }
-
- /**
- * @param preferences
- */
- public void setViewerPreferences(int preferences) {
- setViewerPreferences(preferences, catalog);
- }
-
- /**
- * @return an int that contains the Viewer Preferences.
- */
- public int getViewerPreferences() {
- int prefs = 0;
- PdfName name = null;
- PdfObject obj = getPdfObjectRelease(catalog.get(PdfName.PAGELAYOUT));
- if (obj != null && obj.isName()) {
- name = (PdfName)obj;
- if (name.equals(PdfName.SINGLEPAGE))
- prefs |= PdfWriter.PageLayoutSinglePage;
- else if (name.equals(PdfName.ONECOLUMN))
- prefs |= PdfWriter.PageLayoutOneColumn;
- else if (name.equals(PdfName.TWOCOLUMNLEFT))
- prefs |= PdfWriter.PageLayoutTwoColumnLeft;
- else if (name.equals(PdfName.TWOCOLUMNRIGHT))
- prefs |= PdfWriter.PageLayoutTwoColumnRight;
- else if (name.equals(PdfName.TWOPAGELEFT))
- prefs |= PdfWriter.PageLayoutTwoPageLeft;
- else if (name.equals(PdfName.TWOPAGERIGHT))
- prefs |= PdfWriter.PageLayoutTwoPageRight;
- }
- obj = getPdfObjectRelease(catalog.get(PdfName.PAGEMODE));
- if (obj != null && obj.isName()) {
- name = (PdfName)obj;
- if (name.equals(PdfName.USENONE))
- prefs |= PdfWriter.PageModeUseNone;
- else if (name.equals(PdfName.USEOUTLINES))
- prefs |= PdfWriter.PageModeUseOutlines;
- else if (name.equals(PdfName.USETHUMBS))
- prefs |= PdfWriter.PageModeUseThumbs;
- else if (name.equals(PdfName.USEOC))
- prefs |= PdfWriter.PageModeUseOC;
- else if (name.equals(PdfName.USEATTACHMENTS))
- prefs |= PdfWriter.PageModeUseAttachments;
- }
- obj = getPdfObjectRelease(catalog.get(PdfName.VIEWERPREFERENCES));
- if (obj == null || !obj.isDictionary())
- return prefs;
- PdfDictionary vp = (PdfDictionary)obj;
- for (int k = 0; k < vpnames.length; ++k) {
- obj = getPdfObject(vp.get(vpnames[k]));
- if (obj != null && "true".equals(obj.toString()))
- prefs |= vpints[k];
- }
- obj = getPdfObjectRelease(vp.get(PdfName.PRINTSCALING));
- if (PdfName.NONE.equals(obj))
- prefs |= PdfWriter.PrintScalingNone;
- obj = getPdfObjectRelease(vp.get(PdfName.NONFULLSCREENPAGEMODE));
- if (obj != null && obj.isName()) {
- name = (PdfName)obj;
- if (name.equals(PdfName.USENONE))
- prefs |= PdfWriter.NonFullScreenPageModeUseNone;
- else if (name.equals(PdfName.USEOUTLINES))
- prefs |= PdfWriter.NonFullScreenPageModeUseOutlines;
- else if (name.equals(PdfName.USETHUMBS))
- prefs |= PdfWriter.NonFullScreenPageModeUseThumbs;
- else if (name.equals(PdfName.USEOC))
- prefs |= PdfWriter.NonFullScreenPageModeUseOC;
- }
- obj = getPdfObjectRelease(vp.get(PdfName.DIRECTION));
- if (obj != null && obj.isName()) {
- name = (PdfName)obj;
- if (name.equals(PdfName.L2R))
- prefs |= PdfWriter.DirectionL2R;
- else if (name.equals(PdfName.R2L))
- prefs |= PdfWriter.DirectionR2L;
- }
- return prefs;
- }
-
- /**
- * Getter for property appendable.
- * @return Value of property appendable.
- */
- public boolean isAppendable() {
- return this.appendable;
- }
-
- /**
- * Setter for property appendable.
- * @param appendable New value of property appendable.
- */
- public void setAppendable(boolean appendable) {
- this.appendable = appendable;
- if (appendable)
- getPdfObject(trailer.get(PdfName.ROOT));
- }
-
- /**
- * Getter for property newXrefType.
- * @return Value of property newXrefType.
- */
- public boolean isNewXrefType() {
- return newXrefType;
- }
-
- /**
- * Getter for property fileLength.
- * @return Value of property fileLength.
- */
- public int getFileLength() {
- return fileLength;
- }
-
- /**
- * Getter for property hybridXref.
- * @return Value of property hybridXref.
- */
- public boolean isHybridXref() {
- return hybridXref;
- }
-
- static class PageRefs {
- private PdfReader reader;
- private IntHashtable refsp;
- private ArrayList refsn;
- private ArrayList pageInh;
- private int lastPageRead = -1;
- private int sizep;
-
- private PageRefs(PdfReader reader) throws IOException {
- this.reader = reader;
- if (reader.partial) {
- refsp = new IntHashtable();
- PdfNumber npages = (PdfNumber)PdfReader.getPdfObjectRelease(reader.rootPages.get(PdfName.COUNT));
- sizep = npages.intValue();
- }
- else {
- readPages();
- }
- }
-
- PageRefs(PageRefs other, PdfReader reader) {
- this.reader = reader;
- this.sizep = other.sizep;
- if (other.refsn != null) {
- refsn = new ArrayList(other.refsn);
- for (int k = 0; k < refsn.size(); ++k) {
- refsn.set(k, duplicatePdfObject((PdfObject)refsn.get(k), reader));
- }
- }
- else
- this.refsp = (IntHashtable)other.refsp.clone();
- }
-
- int size() {
- if (refsn != null)
- return refsn.size();
- else
- return sizep;
- }
-
- void readPages() throws IOException {
- if (refsn != null)
- return;
- refsp = null;
- refsn = new ArrayList();
- pageInh = new ArrayList();
- iteratePages((PRIndirectReference)reader.catalog.get(PdfName.PAGES));
- pageInh = null;
- reader.rootPages.put(PdfName.COUNT, new PdfNumber(refsn.size()));
- }
-
- void reReadPages() throws IOException {
- refsn = null;
- readPages();
- }
-
- /** Gets the dictionary that represents a page.
- * @param pageNum the page number. 1 is the first
- * @return the page dictionary
- */
- public PdfDictionary getPageN(int pageNum) {
- PRIndirectReference ref = getPageOrigRef(pageNum);
- return (PdfDictionary)PdfReader.getPdfObject(ref);
- }
-
- /**
- * @param pageNum
- * @return a dictionary object
- */
- public PdfDictionary getPageNRelease(int pageNum) {
- PdfDictionary page = getPageN(pageNum);
- releasePage(pageNum);
- return page;
- }
-
- /**
- * @param pageNum
- * @return an indirect reference
- */
- public PRIndirectReference getPageOrigRefRelease(int pageNum) {
- PRIndirectReference ref = getPageOrigRef(pageNum);
- releasePage(pageNum);
- return ref;
- }
-
- /** Gets the page reference to this page.
- * @param pageNum the page number. 1 is the first
- * @return the page reference
- */
- public PRIndirectReference getPageOrigRef(int pageNum) {
- try {
- --pageNum;
- if (pageNum < 0 || pageNum >= size())
- return null;
- if (refsn != null)
- return (PRIndirectReference)refsn.get(pageNum);
- else {
- int n = refsp.get(pageNum);
- if (n == 0) {
- PRIndirectReference ref = getSinglePage(pageNum);
- if (reader.lastXrefPartial == -1)
- lastPageRead = -1;
- else
- lastPageRead = pageNum;
- reader.lastXrefPartial = -1;
- refsp.put(pageNum, ref.getNumber());
- return ref;
- }
- else {
- if (lastPageRead != pageNum)
- lastPageRead = -1;
- return new PRIndirectReference(reader, n);
- }
- }
- }
- catch (Exception e) {
- throw new ExceptionConverter(e);
- }
- }
-
- /**
- * @param pageNum
- */
- public void releasePage(int pageNum) {
- if (refsp == null)
- return;
- --pageNum;
- if (pageNum < 0 || pageNum >= size())
- return;
- if (pageNum != lastPageRead)
- return;
- lastPageRead = -1;
- reader.lastXrefPartial = refsp.get(pageNum);
- reader.releaseLastXrefPartial();
- refsp.remove(pageNum);
- }
-
- /**
- *
- */
- public void resetReleasePage() {
- if (refsp == null)
- return;
- lastPageRead = -1;
- }
-
- void insertPage(int pageNum, PRIndirectReference ref) {
- --pageNum;
- if (refsn != null) {
- if (pageNum >= refsn.size())
- refsn.add(ref);
- else
- refsn.add(pageNum, ref);
- }
- else {
- ++sizep;
- lastPageRead = -1;
- if (pageNum >= size()) {
- refsp.put(size(), ref.getNumber());
- }
- else {
- IntHashtable refs2 = new IntHashtable((refsp.size() + 1) * 2);
- for (Iterator it = refsp.getEntryIterator(); it.hasNext();) {
- IntHashtable.IntHashtableEntry entry = (IntHashtable.IntHashtableEntry)it.next();
- int p = entry.getKey();
- refs2.put(p >= pageNum ? p + 1 : p, entry.getValue());
- }
- refs2.put(pageNum, ref.getNumber());
- refsp = refs2;
- }
- }
- }
-
- private void pushPageAttributes(PdfDictionary nodePages) {
- PdfDictionary dic = new PdfDictionary();
- if (pageInh.size() != 0) {
- dic.putAll((PdfDictionary)pageInh.get(pageInh.size() - 1));
- }
- for (int k = 0; k < pageInhCandidates.length; ++k) {
- PdfObject obj = nodePages.get(pageInhCandidates[k]);
- if (obj != null)
- dic.put(pageInhCandidates[k], obj);
- }
- pageInh.add(dic);
- }
-
- private void popPageAttributes() {
- pageInh.remove(pageInh.size() - 1);
- }
-
- private void iteratePages(PRIndirectReference rpage) throws IOException {
- PdfDictionary page = (PdfDictionary)getPdfObject(rpage);
- PdfArray kidsPR = (PdfArray)getPdfObject(page.get(PdfName.KIDS));
- if (kidsPR == null) {
- page.put(PdfName.TYPE, PdfName.PAGE);
- PdfDictionary dic = (PdfDictionary)pageInh.get(pageInh.size() - 1);
- PdfName key;
- for (Iterator i = dic.getKeys().iterator(); i.hasNext();) {
- key = (PdfName)i.next();
- if (page.get(key) == null)
- page.put(key, dic.get(key));
- }
- if (page.get(PdfName.MEDIABOX) == null) {
- PdfArray arr = new PdfArray(new float[]{0,0,PageSize.LETTER.right(),PageSize.LETTER.top()});
- page.put(PdfName.MEDIABOX, arr);
- }
- refsn.add(rpage);
- }
- else {
- page.put(PdfName.TYPE, PdfName.PAGES);
- pushPageAttributes(page);
- ArrayList kids = kidsPR.getArrayList();
- for (int k = 0; k < kids.size(); ++k){
- PdfObject obj = (PdfObject)kids.get(k);
- if (!obj.isIndirect()) {
- while (k < kids.size())
- kids.remove(k);
- break;
- }
- iteratePages((PRIndirectReference)obj);
- }
- popPageAttributes();
- }
- }
-
- protected PRIndirectReference getSinglePage(int n) throws IOException {
- PdfDictionary acc = new PdfDictionary();
- PdfDictionary top = reader.rootPages;
- int base = 0;
- while (true) {
- for (int k = 0; k < pageInhCandidates.length; ++k) {
- PdfObject obj = top.get(pageInhCandidates[k]);
- if (obj != null)
- acc.put(pageInhCandidates[k], obj);
- }
- PdfArray kids = (PdfArray)PdfReader.getPdfObjectRelease(top.get(PdfName.KIDS));
- for (Iterator it = kids.listIterator(); it.hasNext();) {
- PRIndirectReference ref = (PRIndirectReference)it.next();
- PdfDictionary dic = (PdfDictionary)getPdfObject(ref);
- int last = reader.lastXrefPartial;
- PdfObject count = getPdfObjectRelease(dic.get(PdfName.COUNT));
- reader.lastXrefPartial = last;
- int acn = 1;
- if (count != null && count.type() == PdfObject.NUMBER)
- acn = ((PdfNumber)count).intValue();
- if (n < base + acn) {
- if (count == null) {
- dic.mergeDifferent(acc);
- return ref;
- }
- reader.releaseLastXrefPartial();
- top = dic;
- break;
- }
- reader.releaseLastXrefPartial();
- base += acn;
- }
- }
- }
-
- private void selectPages(List pagesToKeep) {
- IntHashtable pg = new IntHashtable();
- ArrayList finalPages = new ArrayList();
- int psize = size();
- for (Iterator it = pagesToKeep.iterator(); it.hasNext();) {
- Integer pi = (Integer)it.next();
- int p = pi.intValue();
- if (p >= 1 && p <= psize && pg.put(p, 1) == 0)
- finalPages.add(pi);
- }
- if (reader.partial) {
- for (int k = 1; k <= psize; ++k) {
- getPageOrigRef(k);
- resetReleasePage();
- }
- }
- PRIndirectReference parent = (PRIndirectReference)reader.catalog.get(PdfName.PAGES);
- PdfDictionary topPages = (PdfDictionary)PdfReader.getPdfObject(parent);
- ArrayList newPageRefs = new ArrayList(finalPages.size());
- PdfArray kids = new PdfArray();
- for (int k = 0; k < finalPages.size(); ++k) {
- int p = ((Integer)finalPages.get(k)).intValue();
- PRIndirectReference pref = getPageOrigRef(p);
- resetReleasePage();
- kids.add(pref);
- newPageRefs.add(pref);
- getPageN(p).put(PdfName.PARENT, parent);
- }
- AcroFields af = reader.getAcroFields();
- boolean removeFields = (af.getFields().size() > 0);
- for (int k = 1; k <= psize; ++k) {
- if (!pg.containsKey(k)) {
- if (removeFields)
- af.removeFieldsFromPage(k);
- PRIndirectReference pref = getPageOrigRef(k);
- int nref = pref.getNumber();
- reader.xrefObj.set(nref, null);
- if (reader.partial) {
- reader.xref[nref * 2] = -1;
- reader.xref[nref * 2 + 1] = 0;
- }
- }
- }
- topPages.put(PdfName.COUNT, new PdfNumber(finalPages.size()));
- topPages.put(PdfName.KIDS, kids);
- refsp = null;
- refsn = newPageRefs;
- }
- }
-
- PdfIndirectReference getCryptoRef() {
- if (cryptoRef == null)
- return null;
- return new PdfIndirectReference(0, cryptoRef.getNumber(), cryptoRef.getGeneration());
- }
-}
\ No newline at end of file |