/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2020 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf;

import com.itextpdf.text.*;
import com.itextpdf.text.error_messages.MessageLocalization;
import com.itextpdf.text.io.TempFileCache;
import com.itextpdf.text.log.Counter;
import com.itextpdf.text.log.CounterFactory;
import com.itextpdf.text.pdf.collection.PdfCollection;
import com.itextpdf.text.pdf.events.PdfPageEventForwarder;
import com.itextpdf.text.pdf.interfaces.*;
import com.itextpdf.text.pdf.internal.PdfIsoKeys;
import com.itextpdf.text.pdf.internal.PdfVersionImp;
import com.itextpdf.text.pdf.internal.PdfXConformanceImp;
import com.itextpdf.text.xml.xmp.PdfProperties;
import com.itextpdf.text.xml.xmp.XmpWriter;
import com.itextpdf.xmp.XMPConst;
import com.itextpdf.xmp.XMPException;
import com.itextpdf.xmp.options.PropertyOptions;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.security.cert.Certificate;
import java.util.*;
import java.util.List;

/**
 * A <CODE>DocWriter</CODE> class for PDF.
 * <P>
 * When this <CODE>PdfWriter</CODE> is added
 * to a certain <CODE>PdfDocument</CODE>, the PDF representation of every Element
 * added to this Document will be written to the outputstream.</P>
 */

public class PdfWriter extends DocWriter implements
	PdfViewerPreferences,
	PdfEncryptionSettings,
	PdfVersion,
	PdfDocumentActions,
	PdfPageActions,
	PdfRunDirection,
	PdfAnnotations {

	/**
	 * The highest generation number possible.
	 * @since	iText 2.1.6
	 */
	public static final int GENERATION_MAX = 65535;

// INNER CLASSES

    /**
     * This class generates the structure of a PDF document.
     * <P>
     * This class covers the third section of Chapter 5 in the 'Portable Document Format
     * Reference Manual version 1.3' (page 55-60). It contains the body of a PDF document
     * (section 5.14) and it can also generate a Cross-reference Table (section 5.15).
     *
     * @see		PdfWriter
     * @see		PdfObject
     * @see		PdfIndirectObject
     */

    public static class PdfBody {

        // inner classes

        /**
         * <CODE>PdfCrossReference</CODE> is an entry in the PDF Cross-Reference table.
         */

        static public class PdfCrossReference implements Comparable<PdfCrossReference> {

            // membervariables
            private final int type;

            /**	Byte offset in the PDF file. */
            private final long offset;

            private final int refnum;
            /**	generation of the object. */
            private final int generation;

            // constructors
            /**
             * Constructs a cross-reference element for a PdfIndirectObject.
             * @param refnum
             * @param	offset		byte offset of the object
             * @param	generation	generation number of the object
             */

            public PdfCrossReference(final int refnum, final long offset, final int generation) {
                type = 0;
                this.offset = offset;
                this.refnum = refnum;
                this.generation = generation;
            }

            /**
             * Constructs a cross-reference element for a PdfIndirectObject.
             * @param refnum
             * @param	offset		byte offset of the object
             */

            public PdfCrossReference(final int refnum, final long offset) {
                type = 1;
                this.offset = offset;
                this.refnum = refnum;
                this.generation = 0;
            }

            public PdfCrossReference(final int type, final int refnum, final long offset, final int generation) {
                this.type = type;
                this.offset = offset;
                this.refnum = refnum;
                this.generation = generation;
            }

            public int getRefnum() {
                return refnum;
            }

            /**
             * Returns the PDF representation of this <CODE>PdfObject</CODE>.
             * @param os
             * @throws IOException
             */

            public void toPdf(final OutputStream os) throws IOException {
                StringBuffer off = new StringBuffer("0000000000").append(offset);
                off.delete(0, off.length() - 10);
                StringBuffer gen = new StringBuffer("00000").append(generation);
                gen.delete(0, gen.length() - 5);

                off.append(' ').append(gen).append(generation == GENERATION_MAX ? " f \n" : " n \n");
                os.write(getISOBytes(off.toString()));
            }

            /**
             * Writes PDF syntax to the OutputStream
             * @param midSize
             * @param os
             * @throws IOException
             */
            public void toPdf(int midSize, final OutputStream os) throws IOException {
                os.write((byte)type);
                while (--midSize >= 0)
                    os.write((byte)(offset >>> 8 * midSize & 0xff));
                os.write((byte)(generation >>> 8 & 0xff));
                os.write((byte)(generation & 0xff));
            }

            /**
             * @see java.lang.Comparable#compareTo(java.lang.Object)
             */
            public int compareTo(final PdfCrossReference other) {
                return refnum < other.refnum ? -1 : refnum==other.refnum ? 0 : 1;
            }

            /**
             * @see java.lang.Object#equals(java.lang.Object)
             */
            @Override
            public boolean equals(final Object obj) {
                if (obj instanceof PdfCrossReference) {
                    PdfCrossReference other = (PdfCrossReference)obj;
                    return refnum == other.refnum;
                }
                else
                    return false;
            }

            /**
             * @see java.lang.Object#hashCode()
             */
            @Override
            public int hashCode() {
				return refnum;
			}

        }

        private static final int OBJSINSTREAM = 200;

        // membervariables

        /** array containing the cross-reference table of the normal objects. */
        protected final TreeSet<PdfCrossReference> xrefs;
        protected int refnum;
        /** the current byte position in the body. */
        protected long position;
        protected final PdfWriter writer;
        protected ByteBuffer index;
        protected ByteBuffer streamObjects;
        protected int currentObjNum;
        protected int numObj = 0;

        // constructors

        /**
         * Constructs a new <CODE>PdfBody</CODE>.
         * @param writer
         */
        protected PdfBody(final PdfWriter writer) {
            xrefs = new TreeSet<PdfCrossReference>();
            xrefs.add(new PdfCrossReference(0, 0, GENERATION_MAX));
            position = writer.getOs().getCounter();
            refnum = 1;
            this.writer = writer;
        }

        // methods

        void setRefnum(final int refnum) {
            this.refnum = refnum;
        }

        protected PdfWriter.PdfBody.PdfCrossReference addToObjStm(final PdfObject obj, final int nObj) throws IOException {
            if (numObj >= OBJSINSTREAM)
                flushObjStm();
            if (index == null) {
                index = new ByteBuffer();
                streamObjects = new ByteBuffer();
                currentObjNum = getIndirectReferenceNumber();
                numObj = 0;
            }
            int p = streamObjects.size();
            int idx = numObj++;
            PdfEncryption enc = writer.crypto;
            writer.crypto = null;
            obj.toPdf(writer, streamObjects);
            writer.crypto = enc;
            streamObjects.append(' ');
            index.append(nObj).append(' ').append(p).append(' ');
            return new PdfWriter.PdfBody.PdfCrossReference(2, nObj, currentObjNum, idx);
        }

        public void flushObjStm() throws IOException {
            if (numObj == 0)
                return;
            int first = index.size();
            index.append(streamObjects);
            PdfStream stream = new PdfStream(index.toByteArray());
            stream.flateCompress(writer.getCompressionLevel());
            stream.put(PdfName.TYPE, PdfName.OBJSTM);
            stream.put(PdfName.N, new PdfNumber(numObj));
            stream.put(PdfName.FIRST, new PdfNumber(first));
            add(stream, currentObjNum);
            index = null;
            streamObjects = null;
            numObj = 0;
        }

        /**
         * Adds a <CODE>PdfObject</CODE> to the body.
         * <P>
         * This methods creates a <CODE>PdfIndirectObject</CODE> with a
         * certain number, containing the given <CODE>PdfObject</CODE>.
         * It also adds a <CODE>PdfCrossReference</CODE> for this object
         * to an <CODE>ArrayList</CODE> that will be used to build the
         * Cross-reference Table.
         *
         * @param		object			a <CODE>PdfObject</CODE>
         * @return		a <CODE>PdfIndirectObject</CODE>
         * @throws IOException
         */

        PdfIndirectObject add(final PdfObject object) throws IOException {
            return add(object, getIndirectReferenceNumber());
        }

        PdfIndirectObject add(final PdfObject object, final boolean inObjStm) throws IOException {
            return add(object, getIndirectReferenceNumber(), 0, inObjStm);
        }

        /**
         * Gets a PdfIndirectReference for an object that will be created in the future.
         * @return a PdfIndirectReference
         */

        public PdfIndirectReference getPdfIndirectReference() {
            return new PdfIndirectReference(0, getIndirectReferenceNumber());
        }

        protected int getIndirectReferenceNumber() {
            int n = refnum++;
            xrefs.add(new PdfCrossReference(n, 0, GENERATION_MAX));
            return n;
        }

        /**
         * Adds a <CODE>PdfObject</CODE> to the body given an already existing
         * PdfIndirectReference.
         * <P>
         * This methods creates a <CODE>PdfIndirectObject</CODE> with the number given by
         * <CODE>ref</CODE>, containing the given <CODE>PdfObject</CODE>.
         * It also adds a <CODE>PdfCrossReference</CODE> for this object
         * to an <CODE>ArrayList</CODE> that will be used to build the
         * Cross-reference Table.
         *
         * @param		object			a <CODE>PdfObject</CODE>
         * @param		ref		        a <CODE>PdfIndirectReference</CODE>
         * @return		a <CODE>PdfIndirectObject</CODE>
         * @throws IOException
         */

        PdfIndirectObject add(final PdfObject object, final PdfIndirectReference ref) throws IOException {
            return add(object, ref, true);
        }

        PdfIndirectObject add(final PdfObject object, final PdfIndirectReference ref, final boolean inObjStm) throws IOException {
            return add(object, ref.getNumber(), ref.getGeneration(), inObjStm);
        }

        PdfIndirectObject add(final PdfObject object, final int refNumber) throws IOException {
            return add(object, refNumber, 0, true); // to false
        }

        protected PdfIndirectObject add(final PdfObject object, final int refNumber, final int generation, final boolean inObjStm) throws IOException {
            if (inObjStm && object.canBeInObjStm() && writer.isFullCompression()) {
                PdfCrossReference pxref = addToObjStm(object, refNumber);
                PdfIndirectObject indirect = new PdfIndirectObject(refNumber, object, writer);
                if (!xrefs.add(pxref)) {
                    xrefs.remove(pxref);
                    xrefs.add(pxref);
                }
                return indirect;
            }
            else {
                PdfIndirectObject indirect;
                if (writer.isFullCompression()) {
                	indirect = new PdfIndirectObject(refNumber, object, writer);
                	write(indirect, refNumber);
                }
                else {
                	indirect = new PdfIndirectObject(refNumber, generation, object, writer);
                	write(indirect, refNumber, generation);
                }
                return indirect;
            }
        }

        protected void write(final PdfIndirectObject indirect, final int refNumber) throws IOException {
            PdfCrossReference pxref = new PdfCrossReference(refNumber, position);
            if (!xrefs.add(pxref)) {
                xrefs.remove(pxref);
                xrefs.add(pxref);
            }
            indirect.writeTo(writer.getOs());
            position = writer.getOs().getCounter();
        }

        protected void write(final PdfIndirectObject indirect, final int refNumber, final int generation) throws IOException {
            PdfCrossReference pxref = new PdfCrossReference(refNumber, position, generation);
            if (!xrefs.add(pxref)) {
                xrefs.remove(pxref);
                xrefs.add(pxref);
            }
            indirect.writeTo(writer.getOs());
            position = writer.getOs().getCounter();
        }

        /**
         * Returns the offset of the Cross-Reference table.
         *
         * @return		an offset
         */

        public long offset() {
            return position;
        }

        /**
         * Returns the total number of objects contained in the CrossReferenceTable of this <CODE>Body</CODE>.
         *
         * @return	a number of objects
         */

        public int size() {
            return Math.max(xrefs.last().getRefnum() + 1, refnum);
        }

        /**
         * Returns the CrossReferenceTable of the <CODE>Body</CODE>.
         * @param os
         * @param root
         * @param info
         * @param encryption
         * @param fileID
         * @param prevxref
         * @throws IOException
         */

        public void writeCrossReferenceTable(final OutputStream os, final PdfIndirectReference root, final PdfIndirectReference info, final PdfIndirectReference encryption, final PdfObject fileID, final long prevxref) throws IOException {
            int refNumber = 0;
            if (writer.isFullCompression()) {
                flushObjStm();
                refNumber = getIndirectReferenceNumber();
                xrefs.add(new PdfCrossReference(refNumber, position));
            }
            PdfCrossReference entry = xrefs.first();
            int first = entry.getRefnum();
            int len = 0;
            ArrayList<Integer> sections = new ArrayList<Integer>();
            for (PdfCrossReference pdfCrossReference : xrefs) {
                entry = pdfCrossReference;
                if (first + len == entry.getRefnum())
                    ++len;
                else {
                    sections.add(Integer.valueOf(first));
                    sections.add(Integer.valueOf(len));
                    first = entry.getRefnum();
                    len = 1;
                }
            }
            sections.add(Integer.valueOf(first));
            sections.add(Integer.valueOf(len));
            if (writer.isFullCompression()) {
                int mid = 5;
                long mask = 0xff00000000L;
                for (; mid > 1; --mid) {
                    if ((mask & position) != 0)
                        break;
                    mask >>>= 8;
                }
                ByteBuffer buf = new ByteBuffer();

                for (Object element : xrefs) {
                    entry = (PdfCrossReference) element;
                    entry.toPdf(mid, buf);
                }
                PdfStream xr = new PdfStream(buf.toByteArray());
                buf = null;
                xr.flateCompress(writer.getCompressionLevel());
                xr.put(PdfName.SIZE, new PdfNumber(size()));
                xr.put(PdfName.ROOT, root);
                if (info != null) {
                    xr.put(PdfName.INFO, info);
                }
                if (encryption != null)
                    xr.put(PdfName.ENCRYPT, encryption);
                if (fileID != null)
                    xr.put(PdfName.ID, fileID);
                xr.put(PdfName.W, new PdfArray(new int[]{1, mid, 2}));
                xr.put(PdfName.TYPE, PdfName.XREF);
                PdfArray idx = new PdfArray();
                for (int k = 0; k < sections.size(); ++k)
                    idx.add(new PdfNumber(sections.get(k).intValue()));
                xr.put(PdfName.INDEX, idx);
                if (prevxref > 0)
                    xr.put(PdfName.PREV, new PdfNumber(prevxref));
                PdfEncryption enc = writer.crypto;
                writer.crypto = null;
                PdfIndirectObject indirect = new PdfIndirectObject(refNumber, xr, writer);
                indirect.writeTo(writer.getOs());
                writer.crypto = enc;
            }
            else {
                os.write(getISOBytes("xref\n"));
                Iterator<PdfCrossReference> i = xrefs.iterator();
                for (int k = 0; k < sections.size(); k += 2) {
                    first = sections.get(k).intValue();
                    len = sections.get(k + 1).intValue();
                    os.write(getISOBytes(String.valueOf(first)));
                    os.write(getISOBytes(" "));
                    os.write(getISOBytes(String.valueOf(len)));
                    os.write('\n');
                    while (len-- > 0) {
                        entry = i.next();
                        entry.toPdf(os);
                    }
                }
            }
        }
    }

    /**
     * <CODE>PdfTrailer</CODE> is the PDF Trailer object.
     * <P>
     * This object is described in the 'Portable Document Format Reference Manual version 1.3'
     * section 5.16 (page 59-60).
     */

    static public class PdfTrailer extends PdfDictionary {

        // membervariables

        long offset;

        // constructors

        /**
         * Constructs a PDF-Trailer.
         *
         * @param		size		the number of entries in the <CODE>PdfCrossReferenceTable</CODE>
         * @param		offset		offset of the <CODE>PdfCrossReferenceTable</CODE>
         * @param		root		an indirect reference to the root of the PDF document
         * @param		info		an indirect reference to the info object of the PDF document
         * @param encryption
         * @param fileID
         * @param prevxref
         */

        public PdfTrailer(final int size, final long offset, final PdfIndirectReference root, final PdfIndirectReference info, final PdfIndirectReference encryption, final PdfObject fileID, final long prevxref) {
            this.offset = offset;
            put(PdfName.SIZE, new PdfNumber(size));
            put(PdfName.ROOT, root);
            if (info != null) {
                put(PdfName.INFO, info);
            }
            if (encryption != null)
                put(PdfName.ENCRYPT, encryption);
            if (fileID != null)
                put(PdfName.ID, fileID);
            if (prevxref > 0)
                put(PdfName.PREV, new PdfNumber(prevxref));
        }

        /**
         * Returns the PDF representation of this <CODE>PdfObject</CODE>.
         * @param writer
         * @param os
         * @throws IOException
         */
        @Override
        public void toPdf(final PdfWriter writer, final OutputStream os) throws IOException {
            PdfWriter.checkPdfIsoConformance(writer, PdfIsoKeys.PDFISOKEY_TRAILER, this);
            os.write(getISOBytes("trailer\n"));
            super.toPdf(null, os);
            os.write('\n');
            writeKeyInfo(os);
            os.write(getISOBytes("startxref\n"));
            os.write(getISOBytes(String.valueOf(offset)));
            os.write(getISOBytes("\n%%EOF\n"));
        }
    }

//	ESSENTIALS
    protected static Counter COUNTER = CounterFactory.getCounter(PdfWriter.class);
    protected Counter getCounter() {
    	return COUNTER;
    }

//	Construct a PdfWriter instance

    /**
     * Constructs a <CODE>PdfWriter</CODE>.
     */
    protected PdfWriter() {
    }

    /**
     * Constructs a <CODE>PdfWriter</CODE>.
     * <P>
     * Remark: a PdfWriter can only be constructed by calling the method
     * <CODE>getInstance(Document document, OutputStream os)</CODE>.
     *
     * @param	document	The <CODE>PdfDocument</CODE> that has to be written
     * @param	os			The <CODE>OutputStream</CODE> the writer has to write to.
     */

    protected PdfWriter(final PdfDocument document, final OutputStream os) {
        super(document, os);
        pdf = document;
        directContentUnder = new PdfContentByte(this);
        directContent = directContentUnder.getDuplicate();
    }

    /**
     * Use this method to get an instance of the <CODE>PdfWriter</CODE>.
     *
     * @param	document	The <CODE>Document</CODE> that has to be written
     * @param	os	The <CODE>OutputStream</CODE> the writer has to write to.
     * @return	a new <CODE>PdfWriter</CODE>
     *
     * @throws	DocumentException on error
     */

    public static PdfWriter getInstance(final Document document, final OutputStream os)
    throws DocumentException {
        PdfDocument pdf = new PdfDocument();
        document.addDocListener(pdf);
        PdfWriter writer = new PdfWriter(pdf, os);
        pdf.addWriter(writer);
        return writer;
    }

    /**
     * Use this method to get an instance of the <CODE>PdfWriter</CODE>.
     *
     * @return a new <CODE>PdfWriter</CODE>
     * @param document The <CODE>Document</CODE> that has to be written
     * @param os The <CODE>OutputStream</CODE> the writer has to write to.
     * @param listener A <CODE>DocListener</CODE> to pass to the PdfDocument.
     * @throws DocumentException on error
     */

    public static PdfWriter getInstance(final Document document, final OutputStream os, final DocListener listener)
    throws DocumentException {
        PdfDocument pdf = new PdfDocument();
        pdf.addDocListener(listener);
        document.addDocListener(pdf);
        PdfWriter writer = new PdfWriter(pdf, os);
        pdf.addWriter(writer);
        return writer;
    }

//	the PdfDocument instance

    /** the pdfdocument object. */
    protected PdfDocument pdf;

    /**
     * Gets the <CODE>PdfDocument</CODE> associated with this writer.
     * @return the <CODE>PdfDocument</CODE>
     */

    PdfDocument getPdfDocument() {
        return pdf;
    }

    /**
     * Use this method to get the info dictionary if you want to
     * change it directly (add keys and values to the info dictionary).
     * @return the info dictionary
     */
    public PdfDictionary getInfo() {
        return pdf.getInfo();
    }

    /**
     * Use this method to get the current vertical page position.
     * @param ensureNewLine Tells whether a new line shall be enforced. This may cause side effects
     *   for elements that do not terminate the lines they've started because those lines will get
     *   terminated.
     * @return The current vertical page position.
     */
    public float getVerticalPosition(final boolean ensureNewLine) {
        return pdf.getVerticalPosition(ensureNewLine);
    }

    /**
     * Sets the initial leading for the PDF document.
     * This has to be done before the document is opened.
     * @param	leading	the initial leading
     * @since	2.1.6
     * @throws	DocumentException	if you try setting the leading after the document was opened.
     */
    public void setInitialLeading(final float leading) throws DocumentException {
    	if (open)
    		throw new DocumentException(MessageLocalization.getComposedMessage("you.can.t.set.the.initial.leading.if.the.document.is.already.open"));
    	pdf.setLeading(leading);
    }

//	the PdfDirectContentByte instances

/*
 * You should see Direct Content as a canvas on which you can draw
 * graphics and text. One canvas goes on top of the page (getDirectContent),
 * the other goes underneath (getDirectContentUnder).
 * You can always the same object throughout your document,
 * even if you have moved to a new page. Whatever you add on
 * the canvas will be displayed on top or under the current page.
 */

    /** The direct content in this document. */
    protected PdfContentByte directContent;

    /** The direct content under in this document. */
    protected PdfContentByte directContentUnder;

    /**
     * Use this method to get the direct content for this document.
     * There is only one direct content, multiple calls to this method
     * will allways retrieve the same object.
     * @return the direct content
     */

    public PdfContentByte getDirectContent() {
        if (!open)
            throw new RuntimeException(MessageLocalization.getComposedMessage("the.document.is.not.open"));
        return directContent;
    }

    /**
     * Use this method to get the direct content under for this document.
     * There is only one direct content, multiple calls to this method
     * will always retrieve the same object.
     * @return the direct content
     */

    public PdfContentByte getDirectContentUnder() {
        if (!open)
            throw new RuntimeException(MessageLocalization.getComposedMessage("the.document.is.not.open"));
        return directContentUnder;
    }

    /**
     * Resets all the direct contents to empty.
     * This happens when a new page is started.
     */
    void resetContent() {
        directContent.reset();
        directContentUnder.reset();
    }

//	PDF body

/*
 * A PDF file has 4 parts: a header, a body, a cross-reference table, and a trailer.
 * The body contains all the PDF objects that make up the PDF document.
 * Each element gets a reference (a set of numbers) and the byte position of
 * every object is stored in the cross-reference table.
 * Use these methods only if you know what you're doing.
 */

    /** body of the PDF document */
    protected PdfBody body;

    protected ICC_Profile colorProfile;

    public ICC_Profile getColorProfile() {
        return colorProfile;
    }

    /**
     * Adds the local destinations to the body of the document.
     * @param desto the <CODE>HashMap</CODE> containing the destinations
     * @throws IOException on error
     */

    void addLocalDestinations(final TreeMap<String, PdfDocument.Destination> desto) throws IOException {
        for (Map.Entry<String, PdfDocument.Destination> entry : desto.entrySet()) {
            String name = entry.getKey();
            PdfDocument.Destination dest = entry.getValue();
            PdfDestination destination = dest.destination;
            if (dest.reference == null)
                dest.reference = getPdfIndirectReference();
            if (destination == null)
                addToBody(new PdfString("invalid_" + name), dest.reference);
            else
                addToBody(destination, dest.reference);
        }
    }

    /**
     * Use this method to add a PDF object to the PDF body.
     * Use this method only if you know what you're doing!
     * @param object
     * @return a PdfIndirectObject
     * @throws IOException
     */
    public PdfIndirectObject addToBody(final PdfObject object) throws IOException {
        PdfIndirectObject iobj = body.add(object);
        cacheObject(iobj);
        return iobj;
    }

    /**
     * Use this method to add a PDF object to the PDF body.
     * Use this method only if you know what you're doing!
     * @param object
     * @param inObjStm
     * @return a PdfIndirectObject
     * @throws IOException
     */
    public PdfIndirectObject addToBody(final PdfObject object, final boolean inObjStm) throws IOException {
        PdfIndirectObject iobj = body.add(object, inObjStm);
        cacheObject(iobj);
        return iobj;
    }

    /**
     * Use this method to add a PDF object to the PDF body.
     * Use this method only if you know what you're doing!
     * @param object
     * @param ref
     * @return a PdfIndirectObject
     * @throws IOException
     */
    public PdfIndirectObject addToBody(final PdfObject object, final PdfIndirectReference ref) throws IOException {
        PdfIndirectObject iobj = body.add(object, ref);
        cacheObject(iobj);
        return iobj;
    }

    /**
     * Use this method to add a PDF object to the PDF body.
     * Use this method only if you know what you're doing!
     * @param object
     * @param ref
     * @param inObjStm
     * @return a PdfIndirectObject
     * @throws IOException
     */
    public PdfIndirectObject addToBody(final PdfObject object, final PdfIndirectReference ref, final boolean inObjStm) throws IOException {
        PdfIndirectObject iobj = body.add(object, ref, inObjStm);
        cacheObject(iobj);
        return iobj;
    }

    /**
     * Use this method to add a PDF object to the PDF body.
     * Use this method only if you know what you're doing!
     * @param object
     * @param refNumber
     * @return a PdfIndirectObject
     * @throws IOException
     */
    public PdfIndirectObject addToBody(final PdfObject object, final int refNumber) throws IOException {
        PdfIndirectObject iobj = body.add(object, refNumber);
        cacheObject(iobj);
        return iobj;
    }

    /**
     * Use this method to add a PDF object to the PDF body.
     * Use this method only if you know what you're doing!
     * @param object
     * @param refNumber
     * @param inObjStm
     * @return a PdfIndirectObject
     * @throws IOException
     */
    public PdfIndirectObject addToBody(final PdfObject object, final int refNumber, final boolean inObjStm) throws IOException {
        PdfIndirectObject iobj = body.add(object, refNumber, 0, inObjStm);
        cacheObject(iobj);
        return iobj;
    }

    /**
     * Use this method for caching objects.
     * @param iobj @see PdfIndirectObject
     */
    protected void cacheObject(PdfIndirectObject iobj) { }

    /**
     * Use this to get an <CODE>PdfIndirectReference</CODE> for an object that
     * will be created in the future.
     * Use this method only if you know what you're doing!
     * @return the <CODE>PdfIndirectReference</CODE>
     */

    public PdfIndirectReference getPdfIndirectReference() {
        return body.getPdfIndirectReference();
    }

    protected int getIndirectReferenceNumber() {
        return body.getIndirectReferenceNumber();
    }

    /**
     * Returns the outputStreamCounter.
     * @return the outputStreamCounter
     */
    public OutputStreamCounter getOs() {
        return os;
    }


//	PDF Catalog

/*
 * The Catalog is also called the root object of the document.
 * Whereas the Cross-Reference maps the objects number with the
 * byte offset so that the viewer can find the objects, the
 * Catalog tells the viewer the numbers of the objects needed
 * to render the document.
 */

    protected PdfDictionary getCatalog(final PdfIndirectReference rootObj) {
        PdfDictionary catalog = pdf.getCatalog(rootObj);
        // [F12] tagged PDF
        buildStructTreeRootForTagged(catalog);
        // [F13] OCG
        if (!documentOCG.isEmpty()) {
        	fillOCProperties(false);
        	catalog.put(PdfName.OCPROPERTIES, OCProperties);
        }
        return catalog;
    }

    protected void buildStructTreeRootForTagged(PdfDictionary catalog) {
        if (tagged) {
            try {
                getStructureTreeRoot().buildTree();
                for (AccessibleElementId elementId : pdf.getStructElements()) {
                    PdfStructureElement element = pdf.getStructElement(elementId, false);
                    addToBody(element, element.getReference());
                }

            }
            catch (Exception e) {
                throw new ExceptionConverter(e);
            }
            catalog.put(PdfName.STRUCTTREEROOT, structureTreeRoot.getReference());
            PdfDictionary mi = new PdfDictionary();
            mi.put(PdfName.MARKED, PdfBoolean.PDFTRUE);
            if (userProperties)
                mi.put(PdfName.USERPROPERTIES, PdfBoolean.PDFTRUE);
            catalog.put(PdfName.MARKINFO, mi);
        }
    }

    /** Holds value of property extraCatalog this is used for Output Intents. */
    protected PdfDictionary extraCatalog;

    /**
     * Sets extra keys to the catalog.
     * @return the catalog to change
     */
    public PdfDictionary getExtraCatalog() {
        if (extraCatalog == null)
            extraCatalog = new PdfDictionary();
        return this.extraCatalog;
    }

//	PdfPages

/*
 * The page root keeps the complete page tree of the document.
 * There's an entry in the Catalog that refers to the root
 * of the page tree, the page tree contains the references
 * to pages and other page trees.
 */

    /** The root of the page tree. */
    protected PdfPages root = new PdfPages(this);
    /** The PdfIndirectReference to the pages. */
    protected ArrayList<PdfIndirectReference> pageReferences = new ArrayList<PdfIndirectReference>();
    /** The current page number. */
    protected int currentPageNumber = 1;
    /**
     * The value of the Tabs entry in the page dictionary.
     * @since	2.1.5
     */
    protected PdfName tabs = null;

    /**
     * Additional page dictionary entries.
     * @since 5.1.0
     */
    protected PdfDictionary pageDictEntries = new PdfDictionary();

    /**
     * Adds an additional entry for the page dictionary.
     * @param key the key
     * @param object the PdfObject for the given key
     * @since 5.1.0
     */
    public void addPageDictEntry(final PdfName key, final PdfObject object) {
    	pageDictEntries.put(key, object);
    }

    /**
     * Gets the additional pageDictEntries.
     * @return the page dictionary entries
     * @since 5.1.0
     */
    public PdfDictionary getPageDictEntries() {
    	return pageDictEntries;
    }

    /**
     * Resets the additional pageDictEntries.
     * @since 5.1.0
     */
    public void resetPageDictEntries() {
    	pageDictEntries = new PdfDictionary();
    }

    /**
     * Use this method to make sure the page tree has a linear structure
     * (every leave is attached directly to the root).
     * Use this method to allow page reordering with method reorderPages.
     */
     public void setLinearPageMode() {
        root.setLinearMode(null);
    }

    /**
     * Use this method to reorder the pages in the document.
     * A <CODE>null</CODE> argument value only returns the number of pages to process.
     * It is advisable to issue a <CODE>Document.newPage()</CODE> before using this method.
     * @return the total number of pages
     * @param order an array with the new page sequence. It must have the
     * same size as the number of pages.
     * @throws DocumentException if all the pages are not present in the array
     */
    public int reorderPages(final int order[]) throws DocumentException {
        return root.reorderPages(order);
    }

    /**
     * Use this method to get a reference to a page existing or not.
     * If the page does not exist yet the reference will be created
     * in advance. If on closing the document, a page number greater
     * than the total number of pages was requested, an exception
     * is thrown.
     * @param page the page number. The first page is 1
     * @return the reference to the page
     */
    public PdfIndirectReference getPageReference(int page) {
        --page;
        if (page < 0)
            throw new IndexOutOfBoundsException(MessageLocalization.getComposedMessage("the.page.number.must.be.gt.eq.1"));
        PdfIndirectReference ref;
        if (page < pageReferences.size()) {
            ref = pageReferences.get(page);
            if (ref == null) {
                ref = body.getPdfIndirectReference();
                pageReferences.set(page, ref);
            }
        }
        else {
            int empty = page - pageReferences.size();
            for (int k = 0; k < empty; ++k)
                pageReferences.add(null);
            ref = body.getPdfIndirectReference();
            pageReferences.add(ref);
        }
        return ref;
    }

    /**
     * Gets the pagenumber of this document.
     * This number can be different from the real pagenumber,
     * if you have (re)set the page number previously.
     * @return a page number
     */

    public int getPageNumber() {
        return pdf.getPageNumber();
    }

    PdfIndirectReference getCurrentPage() {
        return getPageReference(currentPageNumber);
    }

    public int getCurrentPageNumber() {
        return currentPageNumber;
    }

    /**
     * Sets the Viewport for the next page.
     * @param vp an array consisting of Viewport dictionaries.
     * @since 5.1.0
     */
    public void setPageViewport(final PdfArray vp) {
    	addPageDictEntry(PdfName.VP, vp);
    }

    /**
     * Sets the value for the Tabs entry in the page tree.
     * @param	tabs	Can be PdfName.R, PdfName.C or PdfName.S.
     * Since the Adobe Extensions Level 3, it can also be PdfName.A
     * or PdfName.W
     * @since	2.1.5
     */
    public void setTabs(final PdfName tabs) {
    	this.tabs = tabs;
    }

    /**
     * Returns the value to be used for the Tabs entry in the page tree.
     * @return the Tabs PdfName
     * @since	2.1.5
     */
    public PdfName getTabs() {
    	return tabs;
    }

    /**
     * Adds some <CODE>PdfContents</CODE> to this Writer.
     * <P>
     * The document has to be open before you can begin to add content
     * to the body of the document.
     *
     * @return a <CODE>PdfIndirectReference</CODE>
     * @param page the <CODE>PdfPage</CODE> to add
     * @param contents the <CODE>PdfContents</CODE> of the page
     * @throws PdfException on error
     */

    PdfIndirectReference add(final PdfPage page, final PdfContents contents) throws PdfException {
        if (!open) {
            throw new PdfException(MessageLocalization.getComposedMessage("the.document.is.not.open"));
        }
        PdfIndirectObject object;
        try {
            object = addToBody(contents);
        }
        catch(IOException ioe) {
            throw new ExceptionConverter(ioe);
        }
        page.add(object.getIndirectReference());
        // [U5]
        if (group != null) {
            page.put(PdfName.GROUP, group);
            group = null;
        }
        else if (rgbTransparencyBlending) {
            PdfDictionary pp = new PdfDictionary();
            pp.put(PdfName.TYPE, PdfName.GROUP);
            pp.put(PdfName.S, PdfName.TRANSPARENCY);
            pp.put(PdfName.CS, PdfName.DEVICERGB);
            page.put(PdfName.GROUP, pp);
        }
        root.addPage(page);
        currentPageNumber++;
        return null;
    }

//	page events

/*
 * Page events are specific for iText, not for PDF.
 * Upon specific events (for instance when a page starts
 * or ends), the corresponding method in the page event
 * implementation that is added to the writer is invoked.
 */

    /** The <CODE>PdfPageEvent</CODE> for this document. */
    private PdfPageEvent pageEvent;

    /**
     * Sets the <CODE>PdfPageEvent</CODE> for this document.
     * @param event the <CODE>PdfPageEvent</CODE> for this document
     */

    public void setPageEvent(final PdfPageEvent event) {
    	if (event == null) this.pageEvent = null;
    	else if (this.pageEvent == null) this.pageEvent = event;
    	else if (this.pageEvent instanceof PdfPageEventForwarder) ((PdfPageEventForwarder)this.pageEvent).addPageEvent(event);
    	else {
    		PdfPageEventForwarder forward = new PdfPageEventForwarder();
    		forward.addPageEvent(this.pageEvent);
    		forward.addPageEvent(event);
    		this.pageEvent = forward;
    	}
    }

    /**
     * Gets the <CODE>PdfPageEvent</CODE> for this document or <CODE>null</CODE>
     * if none is set.
     * @return the <CODE>PdfPageEvent</CODE> for this document or <CODE>null</CODE>
     * if none is set
     */

    public PdfPageEvent getPageEvent() {
        return pageEvent;
    }

//	Open and Close methods + method that create the PDF

    /** A number referring to the previous Cross-Reference Table. */
    protected long prevxref = 0;
    /** The original file ID (if present). */
    protected byte[] originalFileID = null;

    /**
     * Signals that the <CODE>Document</CODE> has been opened and that
     * <CODE>Elements</CODE> can be added.
     * <P>
     * When this method is called, the PDF-document header is
     * written to the outputstream.
     * @see com.itextpdf.text.DocWriter#open()
     */
    @Override
    public void open() {
        super.open();
        try {
        	pdf_version.writeHeader(os);
            body = new PdfBody(this);
            if (isPdfX() && ((PdfXConformanceImp)pdfIsoConformance).isPdfX32002()) {
                PdfDictionary sec = new PdfDictionary();
                sec.put(PdfName.GAMMA, new PdfArray(new float[]{2.2f,2.2f,2.2f}));
                sec.put(PdfName.MATRIX, new PdfArray(new float[]{0.4124f,0.2126f,0.0193f,0.3576f,0.7152f,0.1192f,0.1805f,0.0722f,0.9505f}));
                sec.put(PdfName.WHITEPOINT, new PdfArray(new float[]{0.9505f,1f,1.089f}));
                PdfArray arr = new PdfArray(PdfName.CALRGB);
                arr.add(sec);
                setDefaultColorspace(PdfName.DEFAULTRGB, addToBody(arr).getIndirectReference());
            }
        }
        catch(IOException ioe) {
            throw new ExceptionConverter(ioe);
        }
    }

    /**
     * Signals that the <CODE>Document</CODE> was closed and that no other
     * <CODE>Elements</CODE> will be added.
     * <P>
     * The pages-tree is built and written to the outputstream.
     * A Catalog is constructed, as well as an Info-object,
     * the reference table is composed and everything is written
     * to the outputstream embedded in a Trailer.
     * @see com.itextpdf.text.DocWriter#close()
     */
    @Override
    public void close() {
        if (open) {
            if (currentPageNumber - 1 != pageReferences.size())
                throw new RuntimeException("The page " + pageReferences.size() +
                " was requested but the document has only " + (currentPageNumber - 1) + " pages.");
            pdf.close();
            try {
                addSharedObjectsToBody();
                for (PdfOCG layer : documentOCG) {
                    addToBody(layer.getPdfObject(), layer.getRef());
                }
                // add the root to the body
                PdfIndirectReference rootRef = root.writePageTree();
                // make the catalog-object and add it to the body
                PdfDictionary catalog = getCatalog(rootRef);
                if (!documentOCG.isEmpty())
                    PdfWriter.checkPdfIsoConformance(this, PdfIsoKeys.PDFISOKEY_LAYER, OCProperties);
                // [C9] if there is XMP data to add: add it
                if (xmpMetadata == null && xmpWriter != null) {
                    try {
                        ByteArrayOutputStream baos = new ByteArrayOutputStream();
                        xmpWriter.serialize(baos);
                    	xmpWriter.close();
                        xmpMetadata = baos.toByteArray();
                    } catch (IOException exc) {
                        xmpWriter = null;
                    } catch (XMPException exc) {
                        xmpWriter = null;
                    }
                }
                if (xmpMetadata != null) {
                    PdfStream xmp = new PdfStream(xmpMetadata);
                    xmp.put(PdfName.TYPE, PdfName.METADATA);
                    xmp.put(PdfName.SUBTYPE, PdfName.XML);
                    if (crypto != null && !crypto.isMetadataEncrypted()) {
                        PdfArray ar = new PdfArray();
                        ar.add(PdfName.CRYPT);
                        xmp.put(PdfName.FILTER, ar);
                    }
                    catalog.put(PdfName.METADATA, body.add(xmp).getIndirectReference());
                }
                getInfo().put(PdfName.PRODUCER, new PdfString(Version.getInstance().getVersion()));
                // [C10] make pdfx conformant
                if (isPdfX()) {
                    completeInfoDictionary(getInfo());
                    completeExtraCatalog(getExtraCatalog());
                }
                // [C11] Output Intents
                if (extraCatalog != null) {
                    catalog.mergeDifferent(extraCatalog);
                }

                writeOutlines(catalog, false);

                // add the Catalog to the body
                PdfIndirectObject indirectCatalog = addToBody(catalog, false);
                // add the info-object to the body
                PdfIndirectObject infoObj = addToBody(getInfo(), false);

                // [F1] encryption
                PdfIndirectReference encryption = null;
                PdfObject fileID = null;
                body.flushObjStm();
            	boolean isModified = (originalFileID != null);
                if (crypto != null) {
                    PdfIndirectObject encryptionObject = addToBody(crypto.getEncryptionDictionary(), false);
                    encryption = encryptionObject.getIndirectReference();
                    fileID = crypto.getFileID(isModified);
                }
                else {
                    fileID = PdfEncryption.createInfoId(isModified ? originalFileID : PdfEncryption.createDocumentId(), isModified);
                }

                // write the cross-reference table of the body
                body.writeCrossReferenceTable(os, indirectCatalog.getIndirectReference(),
                    infoObj.getIndirectReference(), encryption,  fileID, prevxref);

                // make the trailer
                // [F2] full compression
                if (fullCompression) {
                	writeKeyInfo(os);
                    os.write(getISOBytes("startxref\n"));
                    os.write(getISOBytes(String.valueOf(body.offset())));
                    os.write(getISOBytes("\n%%EOF\n"));
                }
                else {
                    PdfTrailer trailer = new PdfTrailer(body.size(),
                    body.offset(),
                    indirectCatalog.getIndirectReference(),
                    infoObj.getIndirectReference(),
                    encryption,
                    fileID, prevxref);
                    trailer.toPdf(this, os);
                }
            } catch(IOException ioe) {
                throw new ExceptionConverter(ioe);
            } finally {
                super.close();
            }
        }
        getCounter().written(os.getCounter());
    }

    protected void addXFormsToBody() throws IOException {
        for (Object objs[] : formXObjects.values()) {
            PdfTemplate template = (PdfTemplate)objs[1];
            if (template != null && template.getIndirectReference() instanceof PRIndirectReference)
                continue;
            if (template != null && template.getType() == PdfTemplate.TYPE_TEMPLATE) {
                addToBody(template.getFormXObject(compressionLevel), template.getIndirectReference());
            }
        }
    }

    protected void addSharedObjectsToBody() throws IOException {
        // [F3] add the fonts
        for (FontDetails details : documentFonts.values()) {
            details.writeFont(this);
        }
        // [F4] add the form XObjects
        addXFormsToBody();
        // [F5] add all the dependencies in the imported pages
        for (PdfReaderInstance element : readerInstances.values()) {
            currentPdfReaderInstance= element;
            currentPdfReaderInstance.writeAllPages();
        }
        currentPdfReaderInstance = null;
        // [F6] add the spotcolors
        for (ColorDetails color : documentColors.values()) {
            addToBody(color.getPdfObject(this), color.getIndirectReference());
        }
        // [F7] add the pattern
        for (PdfPatternPainter pat : documentPatterns.keySet()) {
            addToBody(pat.getPattern(compressionLevel), pat.getIndirectReference());
        }
        // [F8] add the shading patterns
        for (PdfShadingPattern shadingPattern : documentShadingPatterns) {
            shadingPattern.addToBody();
        }
        // [F9] add the shadings
        for (PdfShading shading : documentShadings) {
            shading.addToBody();
        }
        // [F10] add the extgstate
        for (Map.Entry<PdfDictionary, PdfObject[]>entry : documentExtGState.entrySet()) {
            PdfDictionary gstate = entry.getKey();
            PdfObject obj[] = entry.getValue();
            addToBody(gstate, (PdfIndirectReference)obj[1]);
        }
        // [F11] add the properties
        for (Map.Entry<Object, PdfObject[]>entry : documentProperties.entrySet()) {
            Object prop = entry.getKey();
            PdfObject[] obj = entry.getValue();
            if (prop instanceof PdfLayerMembership){
                PdfLayerMembership layer = (PdfLayerMembership)prop;
                addToBody(layer.getPdfObject(), layer.getRef());
            }
            else if (prop instanceof PdfDictionary && !(prop instanceof PdfLayer)){
                addToBody((PdfDictionary)prop, (PdfIndirectReference)obj[1]);
            }
        }
    }

// Root data for the PDF document (used when composing the Catalog)

//  [C1] Outlines (bookmarks)

     /**
      * Use this method to get the root outline
      * and construct bookmarks.
      * @return the root outline
      */

     public PdfOutline getRootOutline() {
         return directContent.getRootOutline();
     }

     protected List<HashMap<String, Object>> newBookmarks;

    /**
     * Sets the bookmarks. The list structure is defined in
     * {@link SimpleBookmark}.
     * @param outlines the bookmarks or <CODE>null</CODE> to remove any
     */
    public void setOutlines(final List<HashMap<String, Object>> outlines) {
        newBookmarks = outlines;
    }

    protected void writeOutlines(final PdfDictionary catalog, final boolean namedAsNames) throws IOException {
        if (newBookmarks == null || newBookmarks.isEmpty())
            return;
        PdfDictionary top = new PdfDictionary();
        PdfIndirectReference topRef = getPdfIndirectReference();
        Object kids[] = SimpleBookmark.iterateOutlines(this, topRef, newBookmarks, namedAsNames);
        top.put(PdfName.FIRST, (PdfIndirectReference)kids[0]);
        top.put(PdfName.LAST, (PdfIndirectReference)kids[1]);
        top.put(PdfName.COUNT, new PdfNumber(((Integer)kids[2]).intValue()));
        addToBody(top, topRef);
        catalog.put(PdfName.OUTLINES, topRef);
    }

//	[C2] PdfVersion interface
     /** possible PDF version (header) */
     public static final char VERSION_1_2 = '2';
     /** possible PDF version (header) */
     public static final char VERSION_1_3 = '3';
     /** possible PDF version (header) */
     public static final char VERSION_1_4 = '4';
     /** possible PDF version (header) */
     public static final char VERSION_1_5 = '5';
     /** possible PDF version (header) */
     public static final char VERSION_1_6 = '6';
     /** possible PDF version (header) */
     public static final char VERSION_1_7 = '7';

     /** possible PDF version (catalog) */
     public static final PdfName PDF_VERSION_1_2 = new PdfName("1.2");
     /** possible PDF version (catalog) */
     public static final PdfName PDF_VERSION_1_3 = new PdfName("1.3");
     /** possible PDF version (catalog) */
     public static final PdfName PDF_VERSION_1_4 = new PdfName("1.4");
     /** possible PDF version (catalog) */
     public static final PdfName PDF_VERSION_1_5 = new PdfName("1.5");
     /** possible PDF version (catalog) */
     public static final PdfName PDF_VERSION_1_6 = new PdfName("1.6");
     /** possible PDF version (catalog) */
     public static final PdfName PDF_VERSION_1_7 = new PdfName("1.7");

    /** Stores the version information for the header and the catalog. */
    protected PdfVersionImp pdf_version = new PdfVersionImp();

    /** @see com.itextpdf.text.pdf.interfaces.PdfVersion#setPdfVersion(char) */
    public void setPdfVersion(final char version) {
        pdf_version.setPdfVersion(version);
    }

    /** @see com.itextpdf.text.pdf.interfaces.PdfVersion#setAtLeastPdfVersion(char) */
    public void setAtLeastPdfVersion(final char version) {
    	pdf_version.setAtLeastPdfVersion(version);
    }

	/** @see com.itextpdf.text.pdf.interfaces.PdfVersion#setPdfVersion(com.itextpdf.text.pdf.PdfName) */
	public void setPdfVersion(final PdfName version) {
		pdf_version.setPdfVersion(version);
	}

	/**
	 * @see com.itextpdf.text.pdf.interfaces.PdfVersion#addDeveloperExtension(com.itextpdf.text.pdf.PdfDeveloperExtension)
	 * @since	2.1.6
	 */
	public void addDeveloperExtension(final PdfDeveloperExtension de) {
		pdf_version.addDeveloperExtension(de);
	}

	/**
	 * Returns the version information.
	 * @return the PdfVersion
	 */
	PdfVersionImp getPdfVersion() {
		return pdf_version;
	}

//  [C3] PdfViewerPreferences interface

	// page layout (section 13.1.1 of "iText in Action")

	/** A viewer preference */
	public static final int PageLayoutSinglePage = 1;
	/** A viewer preference */
	public static final int PageLayoutOneColumn = 2;
	/** A viewer preference */
	public static final int PageLayoutTwoColumnLeft = 4;
	/** A viewer preference */
	public static final int PageLayoutTwoColumnRight = 8;
	/** A viewer preference */
	public static final int PageLayoutTwoPageLeft = 16;
	/** A viewer preference */
	public static final int PageLayoutTwoPageRight = 32;

    // page mode (section 13.1.2 of "iText in Action")

    /** A viewer preference */
    public static final int PageModeUseNone = 64;
    /** A viewer preference */
    public static final int PageModeUseOutlines = 128;
    /** A viewer preference */
    public static final int PageModeUseThumbs = 256;
    /** A viewer preference */
    public static final int PageModeFullScreen = 512;
    /** A viewer preference */
    public static final int PageModeUseOC = 1024;
    /** A viewer preference */
    public static final int PageModeUseAttachments = 2048;

    // values for setting viewer preferences in iText versions older than 2.x

    /** A viewer preference */
    public static final int HideToolbar = 1 << 12;
    /** A viewer preference */
    public static final int HideMenubar = 1 << 13;
    /** A viewer preference */
    public static final int HideWindowUI = 1 << 14;
    /** A viewer preference */
    public static final int FitWindow = 1 << 15;
    /** A viewer preference */
    public static final int CenterWindow = 1 << 16;
    /** A viewer preference */
    public static final int DisplayDocTitle = 1 << 17;

    /** A viewer preference */
    public static final int NonFullScreenPageModeUseNone = 1 << 18;
    /** A viewer preference */
    public static final int NonFullScreenPageModeUseOutlines = 1 << 19;
    /** A viewer preference */
    public static final int NonFullScreenPageModeUseThumbs = 1 << 20;
    /** A viewer preference */
    public static final int NonFullScreenPageModeUseOC = 1 << 21;

    /** A viewer preference */
    public static final int DirectionL2R = 1 << 22;
    /** A viewer preference */
    public static final int DirectionR2L = 1 << 23;

    /** A viewer preference */
    public static final int PrintScalingNone = 1 << 24;

    /** @see com.itextpdf.text.pdf.interfaces.PdfViewerPreferences#setViewerPreferences(int) */
    public void setViewerPreferences(final int preferences) {
        pdf.setViewerPreferences(preferences);
    }

    /** @see com.itextpdf.text.pdf.interfaces.PdfViewerPreferences#addViewerPreference(com.itextpdf.text.pdf.PdfName, com.itextpdf.text.pdf.PdfObject) */
    public void addViewerPreference(final PdfName key, final PdfObject value) {
    	pdf.addViewerPreference(key, value);
    }

//  [C4] Page labels

    /**
     * Use this method to add page labels
     * @param pageLabels the page labels
     */
    public void setPageLabels(final PdfPageLabels pageLabels) {
        pdf.setPageLabels(pageLabels);
    }

//  [C5] named objects: named destinations, javascript, embedded files

    /**
     * Adds named destinations in bulk.
     * Valid keys and values of the map can be found in the map
     * that is created by SimpleNamedDestination.
     * @param	map	a map with strings as keys for the names,
     * 			and structured strings as values for the destinations
     * @param	page_offset	number of pages that has to be added to
     * 			the page numbers in the destinations (useful if you
     *          use this method in combination with PdfCopy).
     * @since	iText 5.0
     */
    public void addNamedDestinations(final Map<String, String> map, final int page_offset) {
    	int page;
    	String dest;
    	PdfDestination destination;
    	for (Map.Entry<String, String> entry : map.entrySet()) {
    		dest = entry.getValue();
    		page = Integer.parseInt(dest.substring(0, dest.indexOf(" ")));
    		destination = new PdfDestination(dest.substring(dest.indexOf(" ") + 1));
    		addNamedDestination(entry.getKey(), page + page_offset, destination);
    	}
    }

    /**
     * Adds one named destination.
     * @param	name	the name for the destination
     * @param	page	the page number where you want to jump to
     * @param	dest	an explicit destination
     * @since	iText 5.0
     */
    public void addNamedDestination(final String name, final int page, final PdfDestination dest) {
        PdfDestination d = new PdfDestination(dest);
    	d.addPage(getPageReference(page));
    	pdf.localDestination(name, d);
    }

     /**
      * Use this method to add a JavaScript action at the document level.
      * When the document opens, all this JavaScript runs.
      * @param js The JavaScript action
      */
     public void addJavaScript(final PdfAction js) {
         pdf.addJavaScript(js);
     }

     /**
      * Use this method to add a JavaScript action at the document level.
      * When the document opens, all this JavaScript runs.
      * @param code the JavaScript code
      * @param unicode select JavaScript unicode. Note that the internal
      * Acrobat JavaScript engine does not support unicode,
      * so this may or may not work for you
      */
     public void addJavaScript(final String code, final boolean unicode) {
         addJavaScript(PdfAction.javaScript(code, this, unicode));
     }

     /**
      * Use this method to adds a JavaScript action at the document level.
      * When the document opens, all this JavaScript runs.
      * @param code the JavaScript code
      */
     public void addJavaScript(final String code) {
         addJavaScript(code, false);
     }
     /**
      * Use this method to add a JavaScript action at the document level.
      * When the document opens, all this JavaScript runs.
      * @param name	The name of the JS Action in the name tree
      * @param js The JavaScript action
      */
     public void addJavaScript(final String name, final PdfAction js) {
         pdf.addJavaScript(name, js);
     }

     /**
      * Use this method to add a JavaScript action at the document level.
      * When the document opens, all this JavaScript runs.
      * @param name	The name of the JS Action in the name tree
      * @param code the JavaScript code
      * @param unicode select JavaScript unicode. Note that the internal
      * Acrobat JavaScript engine does not support unicode,
      * so this may or may not work for you
      */
     public void addJavaScript(final String name, final String code, final boolean unicode) {
         addJavaScript(name, PdfAction.javaScript(code, this, unicode));
     }

     /**
      * Use this method to adds a JavaScript action at the document level.
      * When the document opens, all this JavaScript runs.
      * @param name	The name of the JS Action in the name tree
      * @param code the JavaScript code
      */
     public void addJavaScript(final String name, final String code) {
         addJavaScript(name, code, false);
     }

     /**
      * Use this method to add a file attachment at the document level.
      * @param description the file description
      * @param fileStore an array with the file. If it's <CODE>null</CODE>
      * the file will be read from the disk
      * @param file the path to the file. It will only be used if
      * <CODE>fileStore</CODE> is not <CODE>null</CODE>
      * @param fileDisplay the actual file name stored in the pdf
      * @throws IOException on error
      */
     public void addFileAttachment(final String description, final byte fileStore[], final String file, final String fileDisplay) throws IOException {
         addFileAttachment(description, PdfFileSpecification.fileEmbedded(this, file, fileDisplay, fileStore));
     }

     /**
      * Use this method to add a file attachment at the document level.
      * @param description the file description
      * @param fs the file specification
     * @throws IOException if the file attachment could not be added to the document
      */
     public void addFileAttachment(final String description, final PdfFileSpecification fs) throws IOException {
         pdf.addFileAttachment(description, fs);
     }

     /**
      * Use this method to add a file attachment at the document level.
      * @param fs the file specification
     * @throws IOException if the file attachment could not be added to the document
      */
     public void addFileAttachment(final PdfFileSpecification fs) throws IOException {
         addFileAttachment(null, fs);
     }

// [C6] Actions (open and additional)

     /** action value */
     public static final PdfName DOCUMENT_CLOSE = PdfName.WC;
     /** action value */
     public static final PdfName WILL_SAVE = PdfName.WS;
     /** action value */
     public static final PdfName DID_SAVE = PdfName.DS;
     /** action value */
     public static final PdfName WILL_PRINT = PdfName.WP;
     /** action value */
     public static final PdfName DID_PRINT = PdfName.DP;

    /** @see com.itextpdf.text.pdf.interfaces.PdfDocumentActions#setOpenAction(java.lang.String) */
    public void setOpenAction(final String name) {
         pdf.setOpenAction(name);
     }

    /** @see com.itextpdf.text.pdf.interfaces.PdfDocumentActions#setOpenAction(com.itextpdf.text.pdf.PdfAction) */
    public void setOpenAction(final PdfAction action) {
         pdf.setOpenAction(action);
     }

    /** @see com.itextpdf.text.pdf.interfaces.PdfDocumentActions#setAdditionalAction(com.itextpdf.text.pdf.PdfName, com.itextpdf.text.pdf.PdfAction) */
    public void setAdditionalAction(final PdfName actionType, final PdfAction action) throws DocumentException {
         if (!(actionType.equals(DOCUMENT_CLOSE) ||
         actionType.equals(WILL_SAVE) ||
         actionType.equals(DID_SAVE) ||
         actionType.equals(WILL_PRINT) ||
         actionType.equals(DID_PRINT))) {
             throw new DocumentException(MessageLocalization.getComposedMessage("invalid.additional.action.type.1", actionType.toString()));
         }
         pdf.addAdditionalAction(actionType, action);
     }

//  [C7] portable collections

    /**
     * Use this method to add the Collection dictionary.
     * @param collection a dictionary of type PdfCollection
     */
    public void setCollection(final PdfCollection collection) {
        setAtLeastPdfVersion(VERSION_1_7);
        pdf.setCollection(collection);
    }

//  [C8] AcroForm

    /** signature value */
    public static final int SIGNATURE_EXISTS = 1;
    /** signature value */
    public static final int SIGNATURE_APPEND_ONLY = 2;

    /** @see com.itextpdf.text.pdf.interfaces.PdfAnnotations#getAcroForm() */
    public PdfAcroForm getAcroForm() {
        return pdf.getAcroForm();
    }

    /** @see com.itextpdf.text.pdf.interfaces.PdfAnnotations#addAnnotation(com.itextpdf.text.pdf.PdfAnnotation) */
    public void addAnnotation(final PdfAnnotation annot) {
        pdf.addAnnotation(annot);
    }

    void addAnnotation(final PdfAnnotation annot, final int page) {
        addAnnotation(annot);
    }

    /** @see com.itextpdf.text.pdf.interfaces.PdfAnnotations#addCalculationOrder(com.itextpdf.text.pdf.PdfFormField) */
    public void addCalculationOrder(final PdfFormField annot) {
        pdf.addCalculationOrder(annot);
    }

    /** @see com.itextpdf.text.pdf.interfaces.PdfAnnotations#setSigFlags(int) */
    public void setSigFlags(final int f) {
        pdf.setSigFlags(f);
    }

    public void setLanguage(final String language) {
        pdf.setLanguage(language);
    }

//  [C9] Metadata

    /** XMP Metadata for the document. */
    protected byte[] xmpMetadata = null;

    /**
     * Use this method to set the XMP Metadata.
     * @param xmpMetadata The xmpMetadata to set.
     */
    public void setXmpMetadata(final byte[] xmpMetadata) {
        this.xmpMetadata = xmpMetadata;
    }

    /**
     * Use this method to set the XMP Metadata for each page.
     * @param xmpMetadata The xmpMetadata to set.
     * @throws IOException
     */
    public void setPageXmpMetadata(final byte[] xmpMetadata) throws IOException {
        pdf.setXmpMetadata(xmpMetadata);
    }

    protected XmpWriter xmpWriter = null;

    public XmpWriter getXmpWriter() {
        return xmpWriter;
    }

    /**
     * Use this method to creates XMP Metadata based
     * on the metadata in the PdfDocument.
     * @since 5.4.4 just creates XmpWriter instance which will be serialized in close.
     */
    public void createXmpMetadata() {
        try {
            xmpWriter = createXmpWriter(null, pdf.getInfo());
            if (isTagged()) {
                try {
                    xmpWriter.getXmpMeta().setPropertyInteger(XMPConst.NS_PDFUA_ID, PdfProperties.PART, 1, new PropertyOptions(PropertyOptions.SEPARATE_NODE));
                } catch (XMPException e) {
                    throw new ExceptionConverter(e);
                }
            }
            xmpMetadata = null;
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }

//  [C10] PDFX Conformance
    /** A PDF/X level. */
    public static final int PDFXNONE = 0;
    /** A PDF/X level. */
    public static final int PDFX1A2001 = 1;
    /** A PDF/X level. */
    public static final int PDFX32002 = 2;

    /** Stores the PDF ISO conformance. */
	protected PdfIsoConformance pdfIsoConformance = initPdfIsoConformance();

    protected PdfIsoConformance initPdfIsoConformance() {
        return new PdfXConformanceImp(this);
    }

    /** @see com.itextpdf.text.pdf.interfaces.PdfXConformance#setPDFXConformance(int) */
    public void setPDFXConformance(final int pdfx) {
		if (!(pdfIsoConformance instanceof PdfXConformanceImp))
			return;
        if (((PdfXConformance)pdfIsoConformance).getPDFXConformance() == pdfx)
            return;
        if (pdf.isOpen())
            throw new PdfXConformanceException(MessageLocalization.getComposedMessage("pdfx.conformance.can.only.be.set.before.opening.the.document"));
        if (crypto != null)
            throw new PdfXConformanceException(MessageLocalization.getComposedMessage("a.pdfx.conforming.document.cannot.be.encrypted"));
        if (pdfx != PDFXNONE)
            setPdfVersion(VERSION_1_3);
        ((PdfXConformance)pdfIsoConformance).setPDFXConformance(pdfx);
    }

    /** @see com.itextpdf.text.pdf.interfaces.PdfXConformance#getPDFXConformance() */
    public int getPDFXConformance() {
		if (pdfIsoConformance instanceof PdfXConformanceImp)
        	return ((PdfXConformance)pdfIsoConformance).getPDFXConformance();
		else
			return PDFXNONE;
    }

    /** @see com.itextpdf.text.pdf.interfaces.PdfXConformance#isPdfX() */
    public boolean isPdfX() {
		if (pdfIsoConformance instanceof PdfXConformanceImp)
        	return ((PdfXConformance)pdfIsoConformance).isPdfX();
		else
			return false;
    }

    /**
     * Checks if any PDF ISO conformance is necessary.
     * @return <code>true</code> if the PDF has to be in conformance with any of the PDF ISO specifications
     */
    public boolean isPdfIso() {
        return pdfIsoConformance.isPdfIso();
    }

//  [C11] Output intents
    /**
     * Sets the values of the output intent dictionary. Null values are allowed to
     * suppress any key.
     *
     * @param outputConditionIdentifier a value
     * @param outputCondition           a value
     * @param registryName              a value
     * @param info                      a value
     * @param colorProfile              a value
     * @since 2.1.5
     * @throws IOException on error
     */
    public void setOutputIntents(final String outputConditionIdentifier, final String outputCondition, final String registryName, final String info, final ICC_Profile colorProfile) throws IOException {
        PdfWriter.checkPdfIsoConformance(this, PdfIsoKeys.PDFISOKEY_OUTPUTINTENT, colorProfile);
        getExtraCatalog();
        PdfDictionary out = new PdfDictionary(PdfName.OUTPUTINTENT);
        if (outputCondition != null)
            out.put(PdfName.OUTPUTCONDITION, new PdfString(outputCondition, PdfObject.TEXT_UNICODE));
        if (outputConditionIdentifier != null)
            out.put(PdfName.OUTPUTCONDITIONIDENTIFIER, new PdfString(outputConditionIdentifier, PdfObject.TEXT_UNICODE));
        if (registryName != null)
            out.put(PdfName.REGISTRYNAME, new PdfString(registryName, PdfObject.TEXT_UNICODE));
        if (info != null)
            out.put(PdfName.INFO, new PdfString(info, PdfObject.TEXT_UNICODE));
        if (colorProfile != null) {
            PdfStream stream = new PdfICCBased(colorProfile, compressionLevel);
            out.put(PdfName.DESTOUTPUTPROFILE, addToBody(stream).getIndirectReference());
        }

        out.put(PdfName.S, PdfName.GTS_PDFX);

        extraCatalog.put(PdfName.OUTPUTINTENTS, new PdfArray(out));
        this.colorProfile = colorProfile;
    }

   /**
     * Sets the values of the output intent dictionary. Null values are allowed to
     * suppress any key.
     *
     * Prefer the <CODE>ICC_Profile</CODE>-based version of this method.
     * @param outputConditionIdentifier a value
     * @param outputCondition           a value, "PDFA/A" to force GTS_PDFA1, otherwise cued by pdfxConformance.
     * @param registryName              a value
     * @param info                      a value
     * @param destOutputProfile         a value
     * @since 1.x
     *
     * @throws IOException
     */
    public void setOutputIntents(final String outputConditionIdentifier, final String outputCondition, final String registryName, final String info, final byte destOutputProfile[]) throws IOException {
        ICC_Profile colorProfile = destOutputProfile == null ? null : ICC_Profile.getInstance(destOutputProfile);
        setOutputIntents(outputConditionIdentifier, outputCondition, registryName, info, colorProfile);
    }


    /**
     * Use this method to copy the output intent dictionary
     * from another document to this one.
     * @param reader the other document
     * @param checkExistence <CODE>true</CODE> to just check for the existence of a valid output intent
     * dictionary, <CODE>false</CODE> to insert the dictionary if it exists
     * @throws IOException on error
     * @return <CODE>true</CODE> if the output intent dictionary exists, <CODE>false</CODE>
     * otherwise
     */
    public boolean setOutputIntents(final PdfReader reader, final boolean checkExistence) throws IOException {
        PdfDictionary catalog = reader.getCatalog();
        PdfArray outs = catalog.getAsArray(PdfName.OUTPUTINTENTS);
        if (outs == null)
            return false;
        if (outs.isEmpty())
            return false;
        PdfDictionary out = outs.getAsDict(0);
        PdfObject obj = PdfReader.getPdfObject(out.get(PdfName.S));
        if (obj == null || !PdfName.GTS_PDFX.equals(obj))
            return false;
        if (checkExistence)
            return true;
        PRStream stream = (PRStream)PdfReader.getPdfObject(out.get(PdfName.DESTOUTPUTPROFILE));
        byte destProfile[] = null;
        if (stream != null) {
            destProfile = PdfReader.getStreamBytes(stream);
        }
        setOutputIntents(getNameString(out, PdfName.OUTPUTCONDITIONIDENTIFIER), getNameString(out, PdfName.OUTPUTCONDITION),
            getNameString(out, PdfName.REGISTRYNAME), getNameString(out, PdfName.INFO), destProfile);
        return true;
    }

    protected static String getNameString(final PdfDictionary dic, final PdfName key) {
        PdfObject obj = PdfReader.getPdfObject(dic.get(key));
        if (obj == null || !obj.isString())
            return null;
        return ((PdfString)obj).toUnicodeString();
    }

// PDF Objects that have an impact on the PDF body

//  [F1] PdfEncryptionSettings interface

    // types of encryption

    /** Type of encryption */
    public static final int STANDARD_ENCRYPTION_40 = 0;
    /** Type of encryption */
    public static final int STANDARD_ENCRYPTION_128 = 1;
    /** Type of encryption */
    public static final int ENCRYPTION_AES_128 = 2;
    /** Type of encryption */
    public static final int ENCRYPTION_AES_256 = 3;
    /** Mask to separate the encryption type from the encryption mode. */
    static final int ENCRYPTION_MASK = 7;
    /** Add this to the mode to keep the metadata in clear text */
    public static final int DO_NOT_ENCRYPT_METADATA = 8;
    /**
     * Add this to the mode to keep encrypt only the embedded files.
     * @since 2.1.3
     */
    public static final int EMBEDDED_FILES_ONLY = 24;

    // permissions

    /** The operation permitted when the document is opened with the user password
     *
     * @since 2.0.7
     */
    public static final int ALLOW_PRINTING = 4 + 2048;

    /** The operation permitted when the document is opened with the user password
     *
     * @since 2.0.7
     */
    public static final int ALLOW_MODIFY_CONTENTS = 8;

    /** The operation permitted when the document is opened with the user password
     *
     * @since 2.0.7
     */
    public static final int ALLOW_COPY = 16;

    /** The operation permitted when the document is opened with the user password
     *
     * @since 2.0.7
     */
    public static final int ALLOW_MODIFY_ANNOTATIONS = 32;

    /** The operation permitted when the document is opened with the user password
     *
     * @since 2.0.7
     */
    public static final int ALLOW_FILL_IN = 256;

    /** The operation permitted when the document is opened with the user password
     *
     * @since 2.0.7
     */
    public static final int ALLOW_SCREENREADERS = 512;

    /** The operation permitted when the document is opened with the user password
     *
     * @since 2.0.7
     */
    public static final int ALLOW_ASSEMBLY = 1024;

    /** The operation permitted when the document is opened with the user password
     *
     * @since 2.0.7
     */
    public static final int ALLOW_DEGRADED_PRINTING = 4;

    /** @deprecated As of iText 2.0.7, use {@link #ALLOW_PRINTING} instead. Scheduled for removal at or after 2.2.0 */
    @Deprecated
    public static final int AllowPrinting = ALLOW_PRINTING;
    /** @deprecated As of iText 2.0.7, use {@link #ALLOW_MODIFY_CONTENTS} instead. Scheduled for removal at or after 2.2.0 */
    @Deprecated
    public static final int AllowModifyContents = ALLOW_MODIFY_CONTENTS;
    /** @deprecated As of iText 2.0.7, use {@link #ALLOW_COPY} instead. Scheduled for removal at or after 2.2.0 */
    @Deprecated
    public static final int AllowCopy = ALLOW_COPY;
    /** @deprecated As of iText 2.0.7, use {@link #ALLOW_MODIFY_ANNOTATIONS} instead. Scheduled for removal at or after 2.2.0 */
    @Deprecated
    public static final int AllowModifyAnnotations = ALLOW_MODIFY_ANNOTATIONS;
    /** @deprecated As of iText 2.0.7, use {@link #ALLOW_FILL_IN} instead. Scheduled for removal at or after 2.2.0 */
    @Deprecated
    public static final int AllowFillIn = ALLOW_FILL_IN;
    /** @deprecated As of iText 2.0.7, use {@link #ALLOW_SCREENREADERS} instead. Scheduled for removal at or after 2.2.0 */
    @Deprecated
    public static final int AllowScreenReaders = ALLOW_SCREENREADERS;
    /** @deprecated As of iText 2.0.7, use {@link #ALLOW_ASSEMBLY} instead. Scheduled for removal at or after 2.2.0 */
    @Deprecated
    public static final int AllowAssembly = ALLOW_ASSEMBLY;
    /** @deprecated As of iText 2.0.7, use {@link #ALLOW_DEGRADED_PRINTING} instead. Scheduled for removal at or after 2.2.0 */
    @Deprecated
    public static final int AllowDegradedPrinting = ALLOW_DEGRADED_PRINTING;

    // Strength of the encryption (kept for historical reasons)
    /** @deprecated As of iText 2.0.7, use {@link #STANDARD_ENCRYPTION_40} instead. Scheduled for removal at or after 2.2.0 */
    @Deprecated
    public static final boolean STRENGTH40BITS = false;
    /** @deprecated As of iText 2.0.7, use {@link #STANDARD_ENCRYPTION_128} instead. Scheduled for removal at or after 2.2.0 */
    @Deprecated
    public static final boolean STRENGTH128BITS = true;

    /** Contains the business logic for cryptography. */
    protected PdfEncryption crypto;
    PdfEncryption getEncryption() {
        return crypto;
    }

    /**
     *  Sets the encryption options for this document. The userPassword and the
     *  ownerPassword can be null or have zero length. In this case the ownerPassword
     *  is replaced by a random string. The open permissions for the document can be
     *  AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations,
     *  AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting.
     *  The permissions can be combined by ORing them.
     * @param userPassword the user password. Can be null or empty
     * @param ownerPassword the owner password. Can be null or empty
     * @param permissions the user permissions
     * @param encryptionType can be any of the following: PdfWriter#STANDARD_ENCRYPTION_40, PdfWriter#STANDARD_ENCRYPTION_128, PdfWriter#ENCRYPTION_AES_128 or PdfWriter#ENCRYPTION_AES_256
     * @throws DocumentException if the document is already open
     */
    public void setEncryption(final byte userPassword[], final byte ownerPassword[], final int permissions, final int encryptionType) throws DocumentException {
        if (pdf.isOpen())
            throw new DocumentException(MessageLocalization.getComposedMessage("encryption.can.only.be.added.before.opening.the.document"));
        crypto = new PdfEncryption();
        crypto.setCryptoMode(encryptionType, 0);
        crypto.setupAllKeys(userPassword, ownerPassword, permissions);
    }

    /**
     *  Sets the encryption options for this document. The userPassword and the
     *  ownerPassword can be null or have zero length. In this case the ownerPassword
     *  is replaced by a random string. The open permissions for the document can be
     *  AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations,
     *  AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting.
     *  The permissions can be combined by ORing them.
     * @param certs Certificates to encrypt the document
     * @param permissions the user permissions
     * @param encryptionType can be any of the following: PdfWriter#STANDARD_ENCRYPTION_40, PdfWriter#STANDARD_ENCRYPTION_128, PdfWriter#ENCRYPTION_AES_128 or PdfWriter#ENCRYPTION_AES_256
     * @throws DocumentException if the document is already open
     */
    public void setEncryption(final Certificate[] certs, final int[] permissions, final int encryptionType) throws DocumentException {
        if (pdf.isOpen())
            throw new DocumentException(MessageLocalization.getComposedMessage("encryption.can.only.be.added.before.opening.the.document"));
        crypto = new PdfEncryption();
        if (certs != null) {
            for (int i=0; i < certs.length; i++) {
                crypto.addRecipient(certs[i], permissions[i]);
            }
        }
        crypto.setCryptoMode(encryptionType, 0);
        crypto.getEncryptionDictionary();
    }

    /**
     * Sets the encryption options for this document. The userPassword and the
     *  ownerPassword can be null or have zero length. In this case the ownerPassword
     *  is replaced by a random string. The open permissions for the document can be
     *  AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations,
     *  AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting.
     *  The permissions can be combined by ORing them.
     * @param userPassword the user password. Can be null or empty
     * @param ownerPassword the owner password. Can be null or empty
     * @param permissions the user permissions
     * @param strength128Bits <code>true</code> for 128 bit key length, <code>false</code> for 40 bit key length
     * @throws DocumentException if the document is already open
     * @deprecated As of iText 2.0.3, replaced by (@link #setEncryption(byte[], byte[], int, int)}. Scheduled for removal at or after 2.2.0
     */
    @Deprecated
    public void setEncryption(final byte userPassword[], final byte ownerPassword[], final int permissions, final boolean strength128Bits) throws DocumentException {
        setEncryption(userPassword, ownerPassword, permissions, strength128Bits ? STANDARD_ENCRYPTION_128 : STANDARD_ENCRYPTION_40);
    }

    /**
     * Sets the encryption options for this document. The userPassword and the
     *  ownerPassword can be null or have zero length. In this case the ownerPassword
     *  is replaced by a random string. The open permissions for the document can be
     *  AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations,
     *  AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting.
     *  The permissions can be combined by ORing them.
     * @param strength <code>true</code> for 128 bit key length, <code>false</code> for 40 bit key length
     * @param userPassword the user password. Can be null or empty
     * @param ownerPassword the owner password. Can be null or empty
     * @param permissions the user permissions
     * @throws DocumentException if the document is already open
     * @deprecated As of iText 2.0.3, replaced by (@link #setEncryption(byte[], byte[], int, int)}. Scheduled for removal at or after 2.2.0
     */
    @Deprecated
    public void setEncryption(final boolean strength, final String userPassword, final String ownerPassword, final int permissions) throws DocumentException {
        setEncryption(getISOBytes(userPassword), getISOBytes(ownerPassword), permissions, strength ? STANDARD_ENCRYPTION_128 : STANDARD_ENCRYPTION_40);
    }

    /**
     * Sets the encryption options for this document. The userPassword and the
     *  ownerPassword can be null or have zero length. In this case the ownerPassword
     *  is replaced by a random string. The open permissions for the document can be
     *  AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations,
     *  AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting.
     *  The permissions can be combined by ORing them.
     * @param encryptionType the type of encryption. It can be one of STANDARD_ENCRYPTION_40, STANDARD_ENCRYPTION_128 or ENCRYPTION_AES128.
     * Optionally DO_NOT_ENCRYPT_METADATA can be ored to output the metadata in cleartext
     * @param userPassword the user password. Can be null or empty
     * @param ownerPassword the owner password. Can be null or empty
     * @param permissions the user permissions
     * @throws DocumentException if the document is already open
     * @deprecated As of iText 2.0.3, replaced by (@link #setEncryption(byte[], byte[], int, int)}. Scheduled for removal at or after 2.2.0
     */
    @Deprecated
    public void setEncryption(final int encryptionType, final String userPassword, final String ownerPassword, final int permissions) throws DocumentException {
        setEncryption(getISOBytes(userPassword), getISOBytes(ownerPassword), permissions, encryptionType);
    }

//  [F2] compression

    /** Holds value of property fullCompression. */
    protected boolean fullCompression = false;

    /**
     * Use this method to find out if 1.5 compression is on.
     * @return the 1.5 compression status
     */
    public boolean isFullCompression() {
        return this.fullCompression;
    }

    /**
     * Use this method to set the document's compression to the
     * PDF 1.5 mode with object streams and xref streams.
     * It can be set at any time but once set it can't be unset.
     */
    public void setFullCompression() throws DocumentException {
    	if (open)
    		throw new DocumentException(MessageLocalization.getComposedMessage("you.can.t.set.the.full.compression.if.the.document.is.already.open"));
        this.fullCompression = true;
        setAtLeastPdfVersion(VERSION_1_5);
    }

    /**
     * The compression level of the content streams.
     * @since 2.1.3
     */
    protected int compressionLevel = PdfStream.DEFAULT_COMPRESSION;

    /**
     * Returns the compression level used for streams written by this writer.
     * @return the compression level (0 = best speed, 9 = best compression, -1 is default)
     * @since 2.1.3
     */
    public int getCompressionLevel() {
        return compressionLevel;
    }

    /**
     * Sets the compression level to be used for streams written by this writer.
     * @param compressionLevel a value between 0 (best speed) and 9 (best compression)
     * @since 2.1.3
     */
    public void setCompressionLevel(final int compressionLevel) {
        if (compressionLevel < PdfStream.NO_COMPRESSION || compressionLevel > PdfStream.BEST_COMPRESSION)
            this.compressionLevel = PdfStream.DEFAULT_COMPRESSION;
        else
            this.compressionLevel = compressionLevel;
    }

//  [F3] adding fonts

    /** The fonts of this document */
    protected LinkedHashMap<BaseFont, FontDetails> documentFonts = new LinkedHashMap<BaseFont, FontDetails>();

    /** The font number counter for the fonts in the document. */
    protected int fontNumber = 1;

    /**
     * Adds a <CODE>BaseFont</CODE> to the document but not to the page resources.
     * It is used for templates.
     * @param bf the <CODE>BaseFont</CODE> to add
     * @return an <CODE>Object[]</CODE> where position 0 is a <CODE>PdfName</CODE>
     * and position 1 is an <CODE>PdfIndirectReference</CODE>
     */

    FontDetails addSimple(final BaseFont bf) {
        FontDetails ret = documentFonts.get(bf);
        if (ret == null) {
            PdfWriter.checkPdfIsoConformance(this, PdfIsoKeys.PDFISOKEY_FONT, bf);
            if (bf.getFontType() == BaseFont.FONT_TYPE_DOCUMENT) {
                ret = new FontDetails(new PdfName("F" + fontNumber++), ((DocumentFont)bf).getIndirectReference(), bf);
            } else {
                ret = new FontDetails(new PdfName("F" + fontNumber++), body.getPdfIndirectReference(), bf);
            }
            documentFonts.put(bf, ret);
        }
        return ret;
    }

    void eliminateFontSubset(final PdfDictionary fonts) {
        for (Object element : documentFonts.values()) {
            FontDetails ft = (FontDetails)element;
            if (fonts.get(ft.getFontName()) != null)
                ft.setSubset(false);
        }
    }

//  [F4] adding (and releasing) form XObjects

    /** The form XObjects in this document. The key is the xref and the value
        is Object[]{PdfName, template}.*/
    protected HashMap<PdfIndirectReference, Object[]> formXObjects = new HashMap<PdfIndirectReference, Object[]>();

    /** The name counter for the form XObjects name. */
    protected int formXObjectsCounter = 1;

    /**
     * Adds a template to the document but not to the page resources.
     * @param template the template to add
     * @param forcedName the template name, rather than a generated one. Can be null
     * @return the <CODE>PdfName</CODE> for this template
     */

    PdfName addDirectTemplateSimple(PdfTemplate template, final PdfName forcedName) {
        PdfIndirectReference ref = template.getIndirectReference();
        Object obj[] = formXObjects.get(ref);
        PdfName name = null;
        try {
            if (obj == null) {
                if (forcedName == null) {
                    name = new PdfName("Xf" + formXObjectsCounter);
                    ++formXObjectsCounter;
                }
                else
                    name = forcedName;
                if (template.getType() == PdfTemplate.TYPE_IMPORTED) {
                    // If we got here from PdfCopy we'll have to fill importedPages
                    PdfImportedPage ip = (PdfImportedPage)template;
                    PdfReader r = ip.getPdfReaderInstance().getReader();
                    if (!readerInstances.containsKey(r)) {
                        readerInstances.put(r, ip.getPdfReaderInstance());
                    }
                    template = null;
                }
                formXObjects.put(ref, new Object[]{name, template});
            }
            else
                name = (PdfName)obj[0];
        }
        catch (Exception e) {
            throw new ExceptionConverter(e);
        }
        return name;
    }

    /**
     * Use this method to releases the memory used by a template.
     * This method writes the template to the output.
     * The template can still be added to any content
     * but changes to the template itself won't have any effect.
     * @param tp the template to release
     * @throws IOException on error
     */
    public void releaseTemplate(final PdfTemplate tp) throws IOException {
        PdfIndirectReference ref = tp.getIndirectReference();
        Object[] objs = formXObjects.get(ref);
        if (objs == null || objs[1] == null)
            return;
        PdfTemplate template = (PdfTemplate)objs[1];
        if (template.getIndirectReference() instanceof PRIndirectReference)
            return;
        if (template.getType() == PdfTemplate.TYPE_TEMPLATE) {
            addToBody(template.getFormXObject(compressionLevel), template.getIndirectReference());
            objs[1] = null;
        }
    }

//  [F5] adding pages imported form other PDF documents

    /**
     * Instances of PdfReader/PdfReaderInstance that are used to import pages.
     * @since 5.0.3
     */
    protected HashMap<PdfReader, PdfReaderInstance> readerInstances = new HashMap<PdfReader, PdfReaderInstance>();

    /**
     * Use this method to get a page from other PDF document.
     * The page can be used as any other PdfTemplate.
     * Note that calling this method more than once with the same parameters
     * will retrieve the same object.
     * @param reader the PDF document where the page is
     * @param pageNumber the page number. The first page is 1
     * @return the template representing the imported page
     */
    public PdfImportedPage getImportedPage(final PdfReader reader, final int pageNumber) {
        return getPdfReaderInstance(reader).getImportedPage(pageNumber);
    }

    /**
     * Returns the PdfReaderInstance associated with the specified reader.
     * Multiple calls with the same reader object will return the same
     * PdfReaderInstance.
     * @param reader the PDF reader that you want an instance for
     * @return the instance for the provided reader
     * @since 5.0.3
     */
    protected PdfReaderInstance getPdfReaderInstance(final PdfReader reader){
        PdfReaderInstance inst = readerInstances.get(reader);
        if (inst == null) {
            inst = reader.getPdfReaderInstance(this);
            readerInstances.put(reader, inst);
        }
        return inst;
    }

    /**
     * Use this method to writes the reader to the document
     * and free the memory used by it.
     * The main use is when concatenating multiple documents
     * to keep the memory usage restricted to the current
     * appending document.
     * @param reader the <CODE>PdfReader</CODE> to free
     * @throws IOException on error
     */
    public void freeReader(final PdfReader reader) throws IOException {
        currentPdfReaderInstance = readerInstances.get(reader);
        if (currentPdfReaderInstance == null)
            return;
        currentPdfReaderInstance.writeAllPages();
        currentPdfReaderInstance = null;
        readerInstances.remove(reader);
    }

    /**
     * Use this method to gets the current document size.
     * This size only includes the data already written
     * to the output stream, it does not include templates or fonts.
     * It is useful if used with <CODE>freeReader()</CODE>
     * when concatenating many documents and an idea of
     * the current size is needed.
     * @return the approximate size without fonts or templates
     */
    public long getCurrentDocumentSize() {
        return body.offset() + body.size() * 20 + 0x48;
    }

    protected PdfReaderInstance currentPdfReaderInstance;

    protected int getNewObjectNumber(final PdfReader reader, final int number, final int generation) {
        if (currentPdfReaderInstance == null || currentPdfReaderInstance.getReader() != reader) {
            currentPdfReaderInstance = getPdfReaderInstance(reader);
        }
        return currentPdfReaderInstance.getNewObjectNumber(number, generation);
    }

    RandomAccessFileOrArray getReaderFile(final PdfReader reader) {
        return currentPdfReaderInstance.getReaderFile();
    }

//  [F6] spot colors

    /** The colors of this document */
    protected HashMap<ICachedColorSpace, ColorDetails> documentColors = new HashMap<ICachedColorSpace, ColorDetails>();

    /** The color number counter for the colors in the document. */
    protected int colorNumber = 1;

    PdfName getColorspaceName() {
        return new PdfName("CS" + colorNumber++);
    }

    /**
     * Adds a <CODE>SpotColor</CODE> to the document but not to the page resources.
     * @param spc the <CODE>SpotColor</CODE> to add
     * @return an <CODE>Object[]</CODE> where position 0 is a <CODE>PdfName</CODE>
     * and position 1 is an <CODE>PdfIndirectReference</CODE>
     */
    ColorDetails addSimple(final ICachedColorSpace spc) {
        ColorDetails ret = documentColors.get(spc);
        if (ret == null) {
            ret = new ColorDetails(getColorspaceName(), body.getPdfIndirectReference(), spc);
            if (spc instanceof IPdfSpecialColorSpace) {
                ((IPdfSpecialColorSpace) spc).getColorantDetails(this);
            }
            documentColors.put(spc, ret);
        }
        return ret;
    }

//  [F7] document patterns

    /** The patterns of this document */
    protected HashMap<PdfPatternPainter, PdfName> documentPatterns = new HashMap<PdfPatternPainter, PdfName>();

    /** The pattern number counter for the colors in the document. */
    protected int patternNumber = 1;

    PdfName addSimplePattern(final PdfPatternPainter painter) {
        PdfName name = documentPatterns.get(painter);
        try {
            if ( name == null ) {
                name = new PdfName("P" + patternNumber);
                ++patternNumber;
                documentPatterns.put(painter, name);
            }
        } catch (Exception e) {
            throw new ExceptionConverter(e);
        }
        return name;
    }

//  [F8] shading patterns

    protected HashSet<PdfShadingPattern> documentShadingPatterns = new HashSet<PdfShadingPattern>();

    void addSimpleShadingPattern(final PdfShadingPattern shading) {
        if (!documentShadingPatterns.contains(shading)) {
            shading.setName(patternNumber);
            ++patternNumber;
            documentShadingPatterns.add(shading);
            addSimpleShading(shading.getShading());
        }
    }

//  [F9] document shadings

    protected HashSet<PdfShading> documentShadings = new HashSet<PdfShading>();

    void addSimpleShading(final PdfShading shading) {
        if (!documentShadings.contains(shading)) {
            documentShadings.add(shading);
            shading.setName(documentShadings.size());
        }
    }

// [F10] extended graphics state (for instance for transparency)

    protected HashMap<PdfDictionary, PdfObject[]> documentExtGState = new HashMap<PdfDictionary, PdfObject[]>();

    PdfObject[] addSimpleExtGState(final PdfDictionary gstate) {
        if (!documentExtGState.containsKey(gstate)) {
            documentExtGState.put(gstate, new PdfObject[]{new PdfName("GS" + (documentExtGState.size() + 1)), getPdfIndirectReference()});
        }
        return documentExtGState.get(gstate);
    }

//  [F11] adding properties (OCG, marked content)

    protected HashMap<Object, PdfObject[]> documentProperties = new HashMap<Object, PdfObject[]>();
    PdfObject[] addSimpleProperty(final Object prop, final PdfIndirectReference refi) {
        if (!documentProperties.containsKey(prop)) {
            if (prop instanceof PdfOCG)
            	PdfWriter.checkPdfIsoConformance(this, PdfIsoKeys.PDFISOKEY_LAYER, prop);
            documentProperties.put(prop, new PdfObject[]{new PdfName("Pr" + (documentProperties.size() + 1)), refi});
        }
        return documentProperties.get(prop);
    }

    boolean propertyExists(final Object prop) {
        return documentProperties.containsKey(prop);
    }

//  [F12] tagged PDF

    static public final int markAll = 0x00;
    static public final int markInlineElementsOnly = 0x01;

    protected boolean tagged = false;
    protected int taggingMode = markInlineElementsOnly;
    protected PdfStructureTreeRoot structureTreeRoot;

    /**
     * Mark this document for tagging. It must be called before open.
     */
    public void setTagged() {
        setTagged(markInlineElementsOnly);
    }

    public void setTagged(int taggingMode) {
        if (open)
            throw new IllegalArgumentException(MessageLocalization.getComposedMessage("tagging.must.be.set.before.opening.the.document"));
        tagged = true;
        this.taggingMode = taggingMode;
    }

    public boolean needToBeMarkedInContent(IAccessibleElement element) {
        if ((taggingMode & markInlineElementsOnly) != 0) {
            if (element.isInline() || PdfName.ARTIFACT.equals(element.getRole())) {
                return true;
            }
            return false;
        }
        return true;
    }

    public void checkElementRole(IAccessibleElement element, IAccessibleElement parent) {
        if (parent != null && (parent.getRole() == null || PdfName.ARTIFACT.equals(parent.getRole())))
            element.setRole(null);
        else if ((taggingMode & markInlineElementsOnly) != 0) {
            if (element.isInline() && element.getRole() == null && (parent == null || !parent.isInline()))
                throw new IllegalArgumentException(MessageLocalization.getComposedMessage("inline.elements.with.role.null.are.not.allowed"));
        }
    }

    /**
     * Check if the document is marked for tagging.
     * @return <CODE>true</CODE> if the document is marked for tagging
     */
    public boolean isTagged() {
        return tagged;
    }

    /**
     * Fix structure of tagged document: remove unused objects, remove unused items from class map,
     * fix xref table due to removed objects.
     */
    protected void flushTaggedObjects() throws IOException {}

    protected void flushAcroFields() throws IOException, BadPdfFormatException {}

    /**
     * Gets the structure tree root. If the document is not marked for tagging it will return <CODE>null</CODE>.
     * @return the structure tree root
     */
    public PdfStructureTreeRoot getStructureTreeRoot() {
        if (tagged && structureTreeRoot == null)
            structureTreeRoot = new PdfStructureTreeRoot(this);
        return structureTreeRoot;
    }

//  [F13] Optional Content Groups
    /** A hashSet containing all the PdfLayer objects. */
    protected LinkedHashSet<PdfOCG> documentOCG = new LinkedHashSet<PdfOCG>();
    /** An array list used to define the order of an OCG tree. */
    protected ArrayList<PdfOCG> documentOCGorder = new ArrayList<PdfOCG>();
    /** The OCProperties in a catalog dictionary. */
    protected PdfOCProperties OCProperties;
    /** The RBGroups array in an OCG dictionary */
    protected PdfArray OCGRadioGroup = new PdfArray();
    /**
     * The locked array in an OCG dictionary
     * @since   2.1.2
     */
    protected PdfArray OCGLocked = new PdfArray();

    /**
     * Use this method to get the <B>Optional Content Properties Dictionary</B>.
     * Each call fills the dictionary with the current layer state.
     * It's advisable to only call this method right before close
     * and do any modifications at that time.
     * @return the Optional Content Properties Dictionary
     */
    public PdfOCProperties getOCProperties() {
        fillOCProperties(true);
        return OCProperties;
    }

    /**
     * Use this method to set a collection of optional content groups
     * whose states are intended to follow a "radio button" paradigm.
     * That is, the state of at most one optional content group
     * in the array should be ON at a time: if one group is turned
     * ON, all others must be turned OFF.
     * @param group the radio group
     */
    public void addOCGRadioGroup(final ArrayList<PdfLayer> group) {
        PdfArray ar = new PdfArray();
        for (int k = 0; k < group.size(); ++k) {
            PdfLayer layer = group.get(k);
            if (layer.getTitle() == null)
                ar.add(layer.getRef());
        }
        if (ar.size() == 0)
            return;
        OCGRadioGroup.add(ar);
    }

    /**
     * Use this method to lock an optional content group.
     * The state of a locked group cannot be changed through the user interface
     * of a viewer application. Producers can use this entry to prevent the visibility
     * of content that depends on these groups from being changed by users.
     * @param layer	the layer that needs to be added to the array of locked OCGs
     * @since	2.1.2
     */
    public void lockLayer(final PdfLayer layer) {
        OCGLocked.add(layer.getRef());
    }

    private static void getOCGOrder(final PdfArray order, final PdfLayer layer) {
        if (!layer.isOnPanel())
            return;
        if (layer.getTitle() == null)
            order.add(layer.getRef());
        ArrayList<PdfLayer> children = layer.getChildren();
        if (children == null)
            return;
        PdfArray kids = new PdfArray();
        if (layer.getTitle() != null)
            kids.add(new PdfString(layer.getTitle(), PdfObject.TEXT_UNICODE));
        for (int k = 0; k < children.size(); ++k) {
            getOCGOrder(kids, children.get(k));
        }
        if (kids.size() > 0)
            order.add(kids);
    }

    private void addASEvent(final PdfName event, final PdfName category) {
        PdfArray arr = new PdfArray();
        for (Object element : documentOCG) {
            PdfLayer layer = (PdfLayer)element;
            PdfDictionary usage = layer.getAsDict(PdfName.USAGE);
            if (usage != null && usage.get(category) != null)
                arr.add(layer.getRef());
        }
        if (arr.size() == 0)
            return;
        PdfDictionary d = OCProperties.getAsDict(PdfName.D);
        PdfArray arras = d.getAsArray(PdfName.AS);
        if (arras == null) {
            arras = new PdfArray();
            d.put(PdfName.AS, arras);
        }
        PdfDictionary as = new PdfDictionary();
        as.put(PdfName.EVENT, event);
        as.put(PdfName.CATEGORY, new PdfArray(category));
        as.put(PdfName.OCGS, arr);
        arras.add(as);
    }

    /**
     * @param erase true to erase the {@link PdfName#OCGS} and {@link PdfName#D} from the OCProperties first.
     * @since 2.1.2
     */
    protected void fillOCProperties(final boolean erase) {
        if (OCProperties == null)
            OCProperties = new PdfOCProperties();
        if (erase) {
            OCProperties.remove(PdfName.OCGS);
            OCProperties.remove(PdfName.D);
        }
        if (OCProperties.get(PdfName.OCGS) == null) {
            PdfArray gr = new PdfArray();
            for (Object element : documentOCG) {
                PdfLayer layer = (PdfLayer)element;
                gr.add(layer.getRef());
            }
            OCProperties.put(PdfName.OCGS, gr);
        }
        if (OCProperties.get(PdfName.D) != null)
            return;
        ArrayList<PdfOCG> docOrder = new ArrayList<PdfOCG>(documentOCGorder);
        for (Iterator<PdfOCG> it = docOrder.iterator(); it.hasNext();) {
            PdfLayer layer = (PdfLayer)it.next();
            if (layer.getParent() != null)
                it.remove();
        }
        PdfArray order = new PdfArray();
        for (Object element : docOrder) {
            PdfLayer layer = (PdfLayer)element;
            getOCGOrder(order, layer);
        }
        PdfDictionary d = new PdfDictionary();
        OCProperties.put(PdfName.D, d);
        d.put(PdfName.ORDER, order);
        if (docOrder.size() > 0 && (docOrder.get(0) instanceof PdfLayer)) {
            PdfLayer l = (PdfLayer)docOrder.get(0);
            PdfString name = l.getAsString(PdfName.NAME);
            if (name != null) {
                d.put(PdfName.NAME, name);
            }
        }
        PdfArray gr = new PdfArray();
        for (Object element : documentOCG) {
            PdfLayer layer = (PdfLayer)element;
            if (!layer.isOn())
                gr.add(layer.getRef());
        }
        if (gr.size() > 0)
            d.put(PdfName.OFF, gr);
        if (OCGRadioGroup.size() > 0)
            d.put(PdfName.RBGROUPS, OCGRadioGroup);
        if (OCGLocked.size() > 0)
            d.put(PdfName.LOCKED, OCGLocked);
        addASEvent(PdfName.VIEW, PdfName.ZOOM);
        addASEvent(PdfName.VIEW, PdfName.VIEW);
        addASEvent(PdfName.PRINT, PdfName.PRINT);
        addASEvent(PdfName.EXPORT, PdfName.EXPORT);
        d.put(PdfName.LISTMODE, PdfName.VISIBLEPAGES);
    }

    void registerLayer(final PdfOCG layer) {
        PdfWriter.checkPdfIsoConformance(this, PdfIsoKeys.PDFISOKEY_LAYER, layer);
        if (layer instanceof PdfLayer) {
            PdfLayer la = (PdfLayer)layer;
            if (la.getTitle() == null) {
                if (!documentOCG.contains(layer)) {
                    documentOCG.add(layer);
                    documentOCGorder.add(layer);
                }
            }
            else {
                documentOCGorder.add(layer);
            }
        }
        else
            throw new IllegalArgumentException(MessageLocalization.getComposedMessage("only.pdflayer.is.accepted"));
    }

//  User methods to change aspects of the page

//  [U1] page size

    /**
     * Use this method to get the size of the media box.
     * @return a Rectangle
     */
    public Rectangle getPageSize() {
        return pdf.getPageSize();
    }

    /**
     * Use this method to set the crop box.
     * The crop box should not be rotated even if the page is rotated.
     * This change only takes effect in the next page.
     * @param crop the crop box
     */
    public void setCropBoxSize(final Rectangle crop) {
        pdf.setCropBoxSize(crop);
    }

    /**
     * Use this method to set the page box sizes.
     * Allowed names are: "crop", "trim", "art" and "bleed".
     * @param boxName the box size
     * @param size the size
     */
    public void setBoxSize(final String boxName, final Rectangle size) {
        pdf.setBoxSize(boxName, size);
    }

    /**
     * Use this method to get the size of a trim, art, crop or bleed box,
     * or null if not defined.
     * @param boxName crop, trim, art or bleed
     */
    public Rectangle getBoxSize(final String boxName) {
        return pdf.getBoxSize(boxName);
    }

    /**
     * Returns the intersection between the crop, trim art or bleed box and the parameter intersectingRectangle.
     * This method returns null when
     * - there is no intersection
     * - any of the above boxes are not defined
     * - the parameter intersectingRectangle is null
     *
     * @param boxName crop, trim, art, bleed
     * @param intersectingRectangle the rectangle that intersects the rectangle associated to the boxName
     * @return the intersection of the two rectangles
     */
    public Rectangle getBoxSize(final String boxName, final Rectangle intersectingRectangle) {
        Rectangle pdfRectangle = pdf.getBoxSize(boxName);

        if ( pdfRectangle == null || intersectingRectangle == null ) { // no intersection
            return null;
        }

        com.itextpdf.awt.geom.Rectangle boxRect = new com.itextpdf.awt.geom.Rectangle(pdfRectangle);
        com.itextpdf.awt.geom.Rectangle intRect = new com.itextpdf.awt.geom.Rectangle(intersectingRectangle);
        com.itextpdf.awt.geom.Rectangle outRect = boxRect.intersection(intRect);

        if ( outRect.isEmpty() ) { // no intersection
            return null;
        }

        Rectangle output = new Rectangle((float) outRect.getX(), (float) outRect.getY(), (float) (outRect.getX() + outRect.getWidth()), (float) (outRect.getY() + outRect.getHeight()));
        output.normalize();
        return output;
    }

//  [U2] take care of empty pages

    /**
     * Use this method to make sure a page is added,
     * even if it's empty. If you use setPageEmpty(false),
     * invoking newPage() after a blank page will add a newPage.
     * setPageEmpty(true) won't have any effect.
     * @param pageEmpty the state
     */
    public void setPageEmpty(final boolean pageEmpty) {
        if (pageEmpty)
            return;
        pdf.setPageEmpty(pageEmpty);
    }

    /**
     * Checks if a newPage() will actually generate a new page.
     * @return true if a new page will be generated, false otherwise
     * @since 5.0.0
     */
    public boolean isPageEmpty() {
        return pdf.isPageEmpty();
    }

//  [U3] page actions (open and close)

    /** action value */
    public static final PdfName PAGE_OPEN = PdfName.O;
    /** action value */
    public static final PdfName PAGE_CLOSE = PdfName.C;

    /** @see com.itextpdf.text.pdf.interfaces.PdfPageActions#setPageAction(com.itextpdf.text.pdf.PdfName, com.itextpdf.text.pdf.PdfAction) */
    public void setPageAction(final PdfName actionType, final PdfAction action) throws DocumentException {
          if (!actionType.equals(PAGE_OPEN) && !actionType.equals(PAGE_CLOSE))
              throw new DocumentException(MessageLocalization.getComposedMessage("invalid.page.additional.action.type.1", actionType.toString()));
          pdf.setPageAction(actionType, action);
      }

    /** @see com.itextpdf.text.pdf.interfaces.PdfPageActions#setDuration(int) */
    public void setDuration(final int seconds) {
         pdf.setDuration(seconds);
     }

    /** @see com.itextpdf.text.pdf.interfaces.PdfPageActions#setTransition(com.itextpdf.text.pdf.PdfTransition) */
    public void setTransition(final PdfTransition transition) {
         pdf.setTransition(transition);
     }

//  [U4] Thumbnail image

    /**
     * Use this method to set the thumbnail image for the current page.
     * @param image the image
     * @throws PdfException on error
     * @throws DocumentException or error
     */
    public void setThumbnail(final Image image) throws PdfException, DocumentException {
        pdf.setThumbnail(image);
    }

//  [U5] Transparency groups

    /**
     * A group attributes dictionary specifying the attributes
     * of the page's page group for use in the transparent
     * imaging model
     */
    protected PdfDictionary group;

    /**
     * Use this method to get the group dictionary.
     * @return Value of property group.
     */
    public PdfDictionary getGroup() {
        return this.group;
    }

    /**
     * Use this method to set the group dictionary.
     * @param group New value of property group.
     */
    public void setGroup(final PdfDictionary group) {
        this.group = group;
    }

//  [U6] space char ratio

    /** The default space-char ratio. */
    public static final float SPACE_CHAR_RATIO_DEFAULT = 2.5f;
    /** Disable the inter-character spacing. */
    public static final float NO_SPACE_CHAR_RATIO = 10000000f;

    /**
     * The ratio between the extra word spacing and the extra character spacing.
     * Extra word spacing will grow <CODE>ratio</CODE> times more than extra character spacing.
     */
    private float spaceCharRatio = SPACE_CHAR_RATIO_DEFAULT;

    /**
     * Use this method to gets the space/character extra spacing ratio
     * for fully justified text.
     * @return the space/character extra spacing ratio
     */
    public float getSpaceCharRatio() {
        return spaceCharRatio;
    }

    /**
     * Use this method to set the ratio between the extra word spacing and
     * the extra character spacing when the text is fully justified.
     * Extra word spacing will grow <CODE>spaceCharRatio</CODE> times more
     * than extra character spacing. If the ratio is <CODE>PdfWriter.NO_SPACE_CHAR_RATIO</CODE>
     * then the extra character spacing will be zero.
     * @param spaceCharRatio the ratio between the extra word spacing and the extra character spacing
     */
    public void setSpaceCharRatio(final float spaceCharRatio) {
        if (spaceCharRatio < 0.001f)
            this.spaceCharRatio = 0.001f;
        else
            this.spaceCharRatio = spaceCharRatio;
    }

//  [U7] run direction (doesn't actually do anything)

    /** Use the default run direction. */
    public static final int RUN_DIRECTION_DEFAULT = 0;
    /** Do not use bidirectional reordering. */
    public static final int RUN_DIRECTION_NO_BIDI = 1;
    /** Use bidirectional reordering with left-to-right
     * preferential run direction.
     */
    public static final int RUN_DIRECTION_LTR = 2;
    /** Use bidirectional reordering with right-to-left
     * preferential run direction.
     */
    public static final int RUN_DIRECTION_RTL = 3;

    protected int runDirection = RUN_DIRECTION_NO_BIDI;

    /**
     * Use this method to set the run direction.
     * This is only used as a placeholder as it does not affect anything.
     * @param runDirection the run direction
     */
    public void setRunDirection(final int runDirection) {
        if (runDirection < RUN_DIRECTION_NO_BIDI || runDirection > RUN_DIRECTION_RTL)
            throw new RuntimeException(MessageLocalization.getComposedMessage("invalid.run.direction.1", runDirection));
        this.runDirection = runDirection;
    }

    /**
     * Use this method to set the run direction.
     * @return the run direction
     */
    public int getRunDirection() {
        return runDirection;
    }

//  [U8] user units
    /**
     * Use this method to set the user unit.
     * A UserUnit is a value that defines the default user space unit.
     * The minimum UserUnit is 1 (1 unit = 1/72 inch).
     * The maximum UserUnit is 75,000.
     * Note that this userunit only works starting with PDF1.6!
     * @param userunit The userunit to set.
     * @throws DocumentException on error
     */
     public void setUserunit(final float userunit) throws DocumentException {
 		if (userunit < 1f || userunit > 75000f) throw new DocumentException(MessageLocalization.getComposedMessage("userunit.should.be.a.value.between.1.and.75000"));
         addPageDictEntry(PdfName.USERUNIT, new PdfNumber(userunit));
         setAtLeastPdfVersion(VERSION_1_6);
     }

// Miscellaneous topics

//  [M1] Color settings

    protected PdfDictionary defaultColorspace = new PdfDictionary();
    /**
     * Use this method to get the default colorspaces.
     * @return the default colorspaces
     */
    public PdfDictionary getDefaultColorspace() {
        return defaultColorspace;
    }

    /**
     * Use this method to sets the default colorspace that will be applied
     * to all the document. The colorspace is only applied if another colorspace
     * with the same name is not present in the content.
     * <p>
     * The colorspace is applied immediately when creating templates and
     * at the page end for the main document content.
     * @param key the name of the colorspace. It can be <CODE>PdfName.DEFAULTGRAY</CODE>, <CODE>PdfName.DEFAULTRGB</CODE>
     * or <CODE>PdfName.DEFAULTCMYK</CODE>
     * @param cs the colorspace. A <CODE>null</CODE> or <CODE>PdfNull</CODE> removes any colorspace with the same name
     */
    public void setDefaultColorspace(final PdfName key, final PdfObject cs) {
        if (cs == null || cs.isNull())
            defaultColorspace.remove(key);
        defaultColorspace.put(key, cs);
    }

//  [M2] spot patterns

    protected HashMap<ColorDetails, ColorDetails> documentSpotPatterns = new HashMap<ColorDetails, ColorDetails>();
    protected ColorDetails patternColorspaceRGB;
    protected ColorDetails patternColorspaceGRAY;
    protected ColorDetails patternColorspaceCMYK;

    ColorDetails addSimplePatternColorspace(final BaseColor color) {
        int type = ExtendedColor.getType(color);
        if (type == ExtendedColor.TYPE_PATTERN || type == ExtendedColor.TYPE_SHADING)
            throw new RuntimeException(MessageLocalization.getComposedMessage("an.uncolored.tile.pattern.can.not.have.another.pattern.or.shading.as.color"));
        try {
            switch (type) {
                case ExtendedColor.TYPE_RGB:
                    if (patternColorspaceRGB == null) {
                        patternColorspaceRGB = new ColorDetails(getColorspaceName(), body.getPdfIndirectReference(), null);
                        PdfArray array = new PdfArray(PdfName.PATTERN);
                        array.add(PdfName.DEVICERGB);
                        addToBody(array, patternColorspaceRGB.getIndirectReference());
                    }
                    return patternColorspaceRGB;
                case ExtendedColor.TYPE_CMYK:
                    if (patternColorspaceCMYK == null) {
                        patternColorspaceCMYK = new ColorDetails(getColorspaceName(), body.getPdfIndirectReference(), null);
                        PdfArray array = new PdfArray(PdfName.PATTERN);
                        array.add(PdfName.DEVICECMYK);
                        addToBody(array, patternColorspaceCMYK.getIndirectReference());
                    }
                    return patternColorspaceCMYK;
                case ExtendedColor.TYPE_GRAY:
                    if (patternColorspaceGRAY == null) {
                        patternColorspaceGRAY = new ColorDetails(getColorspaceName(), body.getPdfIndirectReference(), null);
                        PdfArray array = new PdfArray(PdfName.PATTERN);
                        array.add(PdfName.DEVICEGRAY);
                        addToBody(array, patternColorspaceGRAY.getIndirectReference());
                    }
                    return patternColorspaceGRAY;
                case ExtendedColor.TYPE_SEPARATION: {
                    ColorDetails details = addSimple(((SpotColor)color).getPdfSpotColor());
                    ColorDetails patternDetails = documentSpotPatterns.get(details);
                    if (patternDetails == null) {
                        patternDetails = new ColorDetails(getColorspaceName(), body.getPdfIndirectReference(), null);
                        PdfArray array = new PdfArray(PdfName.PATTERN);
                        array.add(details.getIndirectReference());
                        addToBody(array, patternDetails.getIndirectReference());
                        documentSpotPatterns.put(details, patternDetails);
                    }
                    return patternDetails;
                }
                default:
                    throw new RuntimeException(MessageLocalization.getComposedMessage("invalid.color.type"));
            }
        }
        catch (Exception e) {
            throw new RuntimeException(e.getMessage());
        }
    }

//  [M3] Images

    /**
     * Use this method to get the strictImageSequence status.
     * @return value of property strictImageSequence
     */
    public boolean isStrictImageSequence() {
        return pdf.isStrictImageSequence();
    }

    /**
     * Use this method to set the image sequence, so that it follows
     * the text in strict order (or not).
     * @param strictImageSequence new value of property strictImageSequence
     *
     */
    public void setStrictImageSequence(final boolean strictImageSequence) {
        pdf.setStrictImageSequence(strictImageSequence);
    }

    /**
     * Use this method to clear text wrapping around images (if applicable).
     * @throws DocumentException
     */
    public void clearTextWrap() throws DocumentException {
        pdf.clearTextWrap();
    }

    /** Dictionary, containing all the images of the PDF document */
    protected PdfDictionary imageDictionary = new PdfDictionary();

    /** This is the list with all the images in the document. */
    private final HashMap<Long, PdfName> images = new HashMap<Long, PdfName>();

    /**
     * Use this method to adds an image to the document
     * but not to the page resources. It is used with
     * templates and <CODE>Document.add(Image)</CODE>.
     * Use this method only if you know what you're doing!
     * @param image the <CODE>Image</CODE> to add
     * @return the name of the image added
     * @throws PdfException on error
     * @throws DocumentException on error
     */
    public PdfName addDirectImageSimple(final Image image) throws PdfException, DocumentException {
        return addDirectImageSimple(image, null);
    }

    /**
     * Adds an image to the document but not to the page resources.
     * It is used with templates and <CODE>Document.add(Image)</CODE>.
     * Use this method only if you know what you're doing!
     * @param image the <CODE>Image</CODE> to add
     * @param fixedRef the reference to used. It may be <CODE>null</CODE>,
     * a <CODE>PdfIndirectReference</CODE> or a <CODE>PRIndirectReference</CODE>.
     * @return the name of the image added
     * @throws PdfException on error
     * @throws DocumentException on error
     */
    public PdfName addDirectImageSimple(final Image image, final PdfIndirectReference fixedRef) throws PdfException, DocumentException {
        PdfName name;
        // if the images is already added, just retrieve the name
        if (images.containsKey(image.getMySerialId())) {
            name = images.get(image.getMySerialId());
        }
        // if it's a new image, add it to the document
        else {
            if (image.isImgTemplate()) {
                name = new PdfName("img" + images.size());
                if(image instanceof ImgWMF){
                    try {
                        ImgWMF wmf = (ImgWMF)image;
                        wmf.readWMF(PdfTemplate.createTemplate(this, 0, 0));
                    }
                    catch (Exception e) {
                        throw new DocumentException(e);
                    }
                }
            }
            else {
                PdfIndirectReference dref = image.getDirectReference();
                if (dref != null) {
                    PdfName rname = new PdfName("img" + images.size());
                    images.put(image.getMySerialId(), rname);
                    imageDictionary.put(rname, dref);
                    return rname;
                }
                Image maskImage = image.getImageMask();
                PdfIndirectReference maskRef = null;
                if (maskImage != null) {
                    PdfName mname = images.get(maskImage.getMySerialId());
                    maskRef = getImageReference(mname);
                }
                PdfImage i = new PdfImage(image, "img" + images.size(), maskRef);
                if (image instanceof ImgJBIG2) {
                    byte[] globals = ((ImgJBIG2) image).getGlobalBytes();
                    if (globals != null) {
                        PdfDictionary decodeparms = new PdfDictionary();
                        decodeparms.put(PdfName.JBIG2GLOBALS, getReferenceJBIG2Globals(globals));
                        i.put(PdfName.DECODEPARMS, decodeparms);
                    }
                }
                if (image.hasICCProfile()) {
                    PdfICCBased icc = new PdfICCBased(image.getICCProfile(), image.getCompressionLevel());
                    PdfIndirectReference iccRef = add(icc);
                    PdfArray iccArray = new PdfArray();
                    iccArray.add(PdfName.ICCBASED);
                    iccArray.add(iccRef);
                    PdfArray colorspace = i.getAsArray(PdfName.COLORSPACE);
                    if (colorspace != null) {
                        if (colorspace.size() > 1 && PdfName.INDEXED.equals(colorspace.getPdfObject(0)))
                            colorspace.set(1, iccArray);
                        else
                            i.put(PdfName.COLORSPACE, iccArray);
                    }
                    else
                        i.put(PdfName.COLORSPACE, iccArray);
                }
                add(i, fixedRef);
                name = i.name();
            }
            images.put(image.getMySerialId(), name);
        }
        return name;
    }

    /**
     * Writes a <CODE>PdfImage</CODE> to the outputstream.
     *
     * @param pdfImage the image to be added
     * @param fixedRef the IndirectReference, may be null then a new indirect reference is returned
     * @return a <CODE>PdfIndirectReference</CODE> to the encapsulated image
     * @throws PdfException when a document isn't open yet, or has been closed
     */

    PdfIndirectReference add(final PdfImage pdfImage, PdfIndirectReference fixedRef) throws PdfException {
        if (! imageDictionary.contains(pdfImage.name())) {
            PdfWriter.checkPdfIsoConformance(this, PdfIsoKeys.PDFISOKEY_IMAGE, pdfImage);
            if (fixedRef instanceof PRIndirectReference) {
                PRIndirectReference r2 = (PRIndirectReference)fixedRef;
                fixedRef = new PdfIndirectReference(0, getNewObjectNumber(r2.getReader(), r2.getNumber(), r2.getGeneration()));
            }
            try {
                if (fixedRef == null)
                    fixedRef = addToBody(pdfImage).getIndirectReference();
                else
                    addToBody(pdfImage, fixedRef);
            }
            catch(IOException ioe) {
                throw new ExceptionConverter(ioe);
            }
            imageDictionary.put(pdfImage.name(), fixedRef);
            return fixedRef;
        }
        return (PdfIndirectReference) imageDictionary.get(pdfImage.name());
    }

    /**
     * return the <CODE>PdfIndirectReference</CODE> to the image with a given name.
     *
     * @param name the name of the image
     * @return a <CODE>PdfIndirectReference</CODE>
     */

    PdfIndirectReference getImageReference(final PdfName name) {
        return (PdfIndirectReference) imageDictionary.get(name);
    }

    protected PdfIndirectReference add(final PdfICCBased icc) {
        PdfIndirectObject object;
        try {
            object = addToBody(icc);
        }
        catch(IOException ioe) {
            throw new ExceptionConverter(ioe);
        }
        return object.getIndirectReference();
    }

    /**
     * A HashSet with Stream objects containing JBIG2 Globals
     * @since 2.1.5
     */
    protected HashMap<PdfStream, PdfIndirectReference> JBIG2Globals = new HashMap<PdfStream, PdfIndirectReference>();
    /**
     * Gets an indirect reference to a JBIG2 Globals stream.
     * Adds the stream if it hasn't already been added to the writer.
	 * @param	content a byte array that may already been added to the writer inside a stream object.
     * @return the PdfIndirectReference of the stream
     * @since  2.1.5
     */
    protected PdfIndirectReference getReferenceJBIG2Globals(final byte[] content) {
        if (content == null) return null;
        for (PdfStream stream : JBIG2Globals.keySet()) {
            if (Arrays.equals(content, stream.getBytes())) {
                return JBIG2Globals.get(stream);
            }
        }
        PdfStream stream = new PdfStream(content);
        PdfIndirectObject ref;
        try {
            ref = addToBody(stream);
        } catch (IOException e) {
            return null;
        }
        JBIG2Globals.put(stream, ref.getIndirectReference());
        return ref.getIndirectReference();
    }

//  [F12] tagged PDF
    /**
     * A flag indicating the presence of structure elements that contain user properties attributes.
     */
    private boolean userProperties;

    /**
     * Gets the flag indicating the presence of structure elements that contain user properties attributes.
     * @return the user properties flag
     */
    public boolean isUserProperties() {
        return this.userProperties;
    }

    /**
     * Sets the flag indicating the presence of structure elements that contain user properties attributes.
     * @param userProperties the user properties flag
     */
    public void setUserProperties(final boolean userProperties) {
        this.userProperties = userProperties;
    }

    /**
     * Holds value of property RGBTranparency.
     */
    private boolean rgbTransparencyBlending;

    /**
     * Gets the transparency blending colorspace.
     * @return <code>true</code> if the transparency blending colorspace is RGB, <code>false</code>
     * if it is the default blending colorspace
     * @since 2.1.0
     */
    public boolean isRgbTransparencyBlending() {
        return this.rgbTransparencyBlending;
    }

    /**
     * Sets the transparency blending colorspace to RGB. The default blending colorspace is
     * CMYK and will result in faded colors in the screen and in printing. Calling this method
     * will return the RGB colors to what is expected. The RGB blending will be applied to all subsequent pages
     * until other value is set.
     * Note that this is a generic solution that may not work in all cases.
     * @param rgbTransparencyBlending <code>true</code> to set the transparency blending colorspace to RGB, <code>false</code>
     * to use the default blending colorspace
     * @since 2.1.0
     */
    public void setRgbTransparencyBlending(final boolean rgbTransparencyBlending) {
        this.rgbTransparencyBlending = rgbTransparencyBlending;
    }

    protected static void writeKeyInfo(OutputStream os) throws IOException {
    	Version version = Version.getInstance();
    	String k = version.getKey();
    	if (k == null) {
            k = "iText";
    	}
        os.write(getISOBytes(String.format("%%%s-%s\n", k, version.getRelease())));

    }

    protected TtfUnicodeWriter ttfUnicodeWriter = null;

    protected TtfUnicodeWriter getTtfUnicodeWriter() {
        if (ttfUnicodeWriter == null)
            ttfUnicodeWriter = new TtfUnicodeWriter(this);
        return ttfUnicodeWriter;
    }

    protected XmpWriter createXmpWriter(ByteArrayOutputStream baos, PdfDictionary info) throws IOException {
        return new XmpWriter(baos, info);
    }

    protected XmpWriter createXmpWriter(ByteArrayOutputStream baos, HashMap<String, String> info) throws IOException {
        return new XmpWriter(baos, info);
    }

    /**
     * A wrapper around PdfAnnotation constructor.
     * It is recommended to use this wrapper instead of direct constructor as this is a convenient way to override PdfAnnotation construction when needed.
     *
     * @param rect
     * @param subtype
     * @return
     */
    public PdfAnnotation createAnnotation(Rectangle rect, PdfName subtype) {
        PdfAnnotation a = new PdfAnnotation(this, rect);
        if (subtype != null)
            a.put(PdfName.SUBTYPE, subtype);
        return a;
    }

    /**
     * A wrapper around PdfAnnotation constructor.
     * It is recommended to use this wrapper instead of direct constructor as this is a convenient way to override PdfAnnotation construction when needed.
     *
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     * @param title
     * @param content
     * @param subtype
     * @return
     */
    public PdfAnnotation createAnnotation(float llx, float lly, float urx, float ury, PdfString title, PdfString content, PdfName subtype) {
        PdfAnnotation a = new PdfAnnotation(this, llx, lly, urx, ury, title, content);
        if (subtype != null)
            a.put(PdfName.SUBTYPE, subtype);
        return a;
    }

    /**
     * A wrapper around PdfAnnotation constructor.
     * It is recommended to use this wrapper instead of direct constructor as this is a convenient way to override PdfAnnotation construction when needed.
     *
     * @param llx
     * @param lly
     * @param urx
     * @param ury
     * @param action
     * @param subtype
     * @return
     */
    public PdfAnnotation createAnnotation(float llx, float lly, float urx, float ury, PdfAction action, PdfName subtype) {
        PdfAnnotation a = new PdfAnnotation(this, llx, lly, urx, ury, action);
        if (subtype != null)
            a.put(PdfName.SUBTYPE, subtype);
        return a;
    }

    public static void checkPdfIsoConformance(PdfWriter writer, int key, Object obj1) {
        if (writer != null)
            writer.checkPdfIsoConformance(key, obj1);
    }

    public void checkPdfIsoConformance(int key, Object obj1) {
        pdfIsoConformance.checkPdfIsoConformance(key, obj1);
    }

    private void completeInfoDictionary(PdfDictionary info) {
        if (isPdfX()) {
            if (info.get(PdfName.GTS_PDFXVERSION) == null) {
                if (((PdfXConformanceImp)pdfIsoConformance).isPdfX1A2001()) {
                    info.put(PdfName.GTS_PDFXVERSION, new PdfString("PDF/X-1:2001"));
                    info.put(new PdfName("GTS_PDFXConformance"), new PdfString("PDF/X-1a:2001"));
                }
                else if (((PdfXConformanceImp)pdfIsoConformance).isPdfX32002())
                    info.put(PdfName.GTS_PDFXVERSION, new PdfString("PDF/X-3:2002"));
            }
            if (info.get(PdfName.TITLE) == null) {
                info.put(PdfName.TITLE, new PdfString("Pdf document"));
            }
            if (info.get(PdfName.CREATOR) == null) {
                info.put(PdfName.CREATOR, new PdfString("Unknown"));
            }
            if (info.get(PdfName.TRAPPED) == null) {
                info.put(PdfName.TRAPPED, new PdfName("False"));
            }
        }
    }

    private void completeExtraCatalog(PdfDictionary extraCatalog) {
        if (isPdfX()) {
            if (extraCatalog.get(PdfName.OUTPUTINTENTS) == null) {
                PdfDictionary out = new PdfDictionary(PdfName.OUTPUTINTENT);
                out.put(PdfName.OUTPUTCONDITION, new PdfString("SWOP CGATS TR 001-1995"));
                out.put(PdfName.OUTPUTCONDITIONIDENTIFIER, new PdfString("CGATS TR 001"));
                out.put(PdfName.REGISTRYNAME, new PdfString("http://www.color.org"));
                out.put(PdfName.INFO, new PdfString(""));
                out.put(PdfName.S, PdfName.GTS_PDFX);
                extraCatalog.put(PdfName.OUTPUTINTENTS, new PdfArray(out));
            }
        }
    }

    static private final List<PdfName> standardStructElems_1_4 = Arrays.asList (PdfName.DOCUMENT, PdfName.PART, PdfName.ART,
            PdfName.SECT, PdfName.DIV, PdfName.BLOCKQUOTE, PdfName.CAPTION, PdfName.TOC, PdfName.TOCI, PdfName.INDEX,
            PdfName.NONSTRUCT, PdfName.PRIVATE, PdfName.P, PdfName.H, PdfName.H1, PdfName.H2, PdfName.H3, PdfName.H4,
            PdfName.H5, PdfName.H6, PdfName.L, PdfName.LBL, PdfName.LI, PdfName.LBODY, PdfName.TABLE, PdfName.TR,
            PdfName.TH, PdfName.TD, PdfName.SPAN, PdfName.QUOTE, PdfName.NOTE, PdfName.REFERENCE, PdfName.BIBENTRY,
            PdfName.CODE, PdfName.LINK, PdfName.FIGURE, PdfName.FORMULA, PdfName.FORM);

    static private final List<PdfName> standardStructElems_1_7 = Arrays.asList(PdfName.DOCUMENT, PdfName.PART, PdfName.ART,
            PdfName.SECT, PdfName.DIV, PdfName.BLOCKQUOTE, PdfName.CAPTION, PdfName.TOC, PdfName.TOCI, PdfName.INDEX,
            PdfName.NONSTRUCT, PdfName.PRIVATE, PdfName.P, PdfName.H, PdfName.H1, PdfName.H2, PdfName.H3, PdfName.H4,
            PdfName.H5, PdfName.H6, PdfName.L, PdfName.LBL, PdfName.LI, PdfName.LBODY, PdfName.TABLE, PdfName.TR,
            PdfName.TH, PdfName.TD, PdfName.THEAD, PdfName.TBODY, PdfName.TFOOT, PdfName.SPAN, PdfName.QUOTE, PdfName.NOTE,
            PdfName.REFERENCE, PdfName.BIBENTRY, PdfName.CODE, PdfName.LINK, PdfName.ANNOT, PdfName.RUBY, PdfName.RB, PdfName.RT,
            PdfName.RP, PdfName.WARICHU, PdfName.WT, PdfName.WP, PdfName.FIGURE, PdfName.FORMULA, PdfName.FORM);


    /**
     * Gets the list of the standard structure element names (roles).
     * @return
     */
    public List<PdfName> getStandardStructElems() {
        if (pdf_version.getVersion() < VERSION_1_7) {
            return standardStructElems_1_4;
        } else {
            return standardStructElems_1_7;
        }
    }

    public void useExternalCacheForTagStructure(TempFileCache fileCache) {
        pdf.useExternalCache(fileCache);
    }

}
