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Devin Jankowski
2023-06-21 12:46:23 -04:00
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iTechSharp/iTextSharp/text/pdf/PdfIndirectObject.cs Normal file
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using System;
using System.IO;
using iTextSharp.text;
/*
* $Id: PdfIndirectObject.cs,v 1.3 2008/05/13 11:25:21 psoares33 Exp $
*
*
* Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
namespace iTextSharp.text.pdf {
/**
* <CODE>PdfIndirectObject</CODE> is the Pdf indirect object.
* <P>
* An <I>indirect object</I> is an object that has been labeled so that it can be referenced by
* other objects. Any type of <CODE>PdfObject</CODE> may be labeled as an indirect object.<BR>
* An indirect object consists of an object identifier, a direct object, and the <B>endobj</B>
* keyword. The <I>object identifier</I> consists of an integer <I>object number</I>, an integer
* <I>generation number</I>, and the <B>obj</B> keyword.<BR>
* This object is described in the 'Portable Document Format Reference Manual version 1.3'
* section 4.10 (page 53).
*
* @see PdfObject
* @see PdfIndirectReference
*/
public class PdfIndirectObject {
// membervariables
/** The object number */
protected int number;
/** the generation number */
protected int generation = 0;
internal static byte[] STARTOBJ = DocWriter.GetISOBytes(" obj");
internal static byte[] ENDOBJ = DocWriter.GetISOBytes("\nendobj\n");
internal static int SIZEOBJ = STARTOBJ.Length + ENDOBJ.Length;
internal PdfObject objecti;
internal PdfWriter writer;
// constructors
/**
* Constructs a <CODE>PdfIndirectObject</CODE>.
*
* @param number the objecti number
* @param objecti the direct objecti
*/
internal PdfIndirectObject(int number, PdfObject objecti, PdfWriter writer) : this(number, 0, objecti, writer) {
}
internal PdfIndirectObject(PdfIndirectReference refi, PdfObject objecti, PdfWriter writer) : this(refi.Number,refi.Generation,objecti,writer) {
}
/**
* Constructs a <CODE>PdfIndirectObject</CODE>.
*
* @param number the objecti number
* @param generation the generation number
* @param objecti the direct objecti
*/
internal PdfIndirectObject(int number, int generation, PdfObject objecti, PdfWriter writer) {
this.writer = writer;
this.number = number;
this.generation = generation;
this.objecti = objecti;
PdfEncryption crypto = null;
if (writer != null)
crypto = writer.Encryption;
if (crypto != null) {
crypto.SetHashKey(number, generation);
}
}
// methods
/**
* Returns a <CODE>PdfIndirectReference</CODE> to this <CODE>PdfIndirectObject</CODE>.
*
* @return a <CODE>PdfIndirectReference</CODE>
*/
public PdfIndirectReference IndirectReference {
get {
return new PdfIndirectReference(objecti.Type, number, generation);
}
}
/**
* Writes eficiently to a stream
*
* @param os the stream to write to
* @throws IOException on write error
*/
internal void WriteTo(Stream os) {
byte[] tmp = DocWriter.GetISOBytes(number.ToString());
os.Write(tmp, 0, tmp.Length);
os.WriteByte((byte)' ');
tmp = DocWriter.GetISOBytes(generation.ToString());
os.Write(tmp, 0, tmp.Length);
os.Write(STARTOBJ, 0, STARTOBJ.Length);
int type = objecti.Type;
if (type != PdfObject.ARRAY && type != PdfObject.DICTIONARY && type != PdfObject.NAME && type != PdfObject.STRING)
os.WriteByte((byte)' ');
objecti.ToPdf(writer, os);
os.Write(ENDOBJ, 0, ENDOBJ.Length);
}
}
}