/*
* $Id$
*
* Copyright 2006 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/
*/
package com.lowagie.text.pdf.internal;
import java.io.IOException;
import com.lowagie.text.DocWriter;
import com.lowagie.text.pdf.OutputStreamCounter;
import com.lowagie.text.pdf.PdfDeveloperExtension;
import com.lowagie.text.pdf.PdfDictionary;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.pdf.interfaces.PdfVersion;
/**
* Stores the PDF version information,
* knows how to write a PDF Header,
* and how to add the version to the catalog (if necessary).
*/
public class PdfVersionImp implements PdfVersion {
/** Contains different strings that are part of the header. */
public static final byte[][] HEADER = {
DocWriter.getISOBytes("\n"),
DocWriter.getISOBytes("%PDF-"),
DocWriter.getISOBytes("\n%\u00e2\u00e3\u00cf\u00d3\n")
};
/** Indicates if the header was already written. */
protected boolean headerWasWritten = false;
/** Indicates if we are working in append mode. */
protected boolean appendmode = false;
/** The version that was or will be written to the header. */
protected char header_version = PdfWriter.VERSION_1_4;
/** The version that will be written to the catalog. */
protected PdfName catalog_version = null;
/**
* The extensions dictionary.
* @since 2.1.6
*/
protected PdfDictionary extensions = null;
/**
* @see com.lowagie.text.pdf.interfaces.PdfVersion#setPdfVersion(char)
*/
public void setPdfVersion(char version) {
if (headerWasWritten || appendmode) {
setPdfVersion(getVersionAsName(version));
}
else {
this.header_version = version;
}
}
/**
* @see com.lowagie.text.pdf.interfaces.PdfVersion#setAtLeastPdfVersion(char)
*/
public void setAtLeastPdfVersion(char version) {
if (version > header_version) {
setPdfVersion(version);
}
}
/**
* @see com.lowagie.text.pdf.interfaces.PdfVersion#setPdfVersion(com.lowagie.text.pdf.PdfName)
*/
public void setPdfVersion(PdfName version) {
if (catalog_version == null || catalog_version.compareTo(version) < 0) {
this.catalog_version = version;
}
}
/**
* Sets the append mode.
*/
public void setAppendmode(boolean appendmode) {
this.appendmode = appendmode;
}
/**
* Writes the header to the OutputStreamCounter.
* @throws IOException
*/
public void writeHeader(OutputStreamCounter os) throws IOException {
if (appendmode) {
os.write(HEADER[0]);
}
else {
os.write(HEADER[1]);
os.write(getVersionAsByteArray(header_version));
os.write(HEADER[2]);
headerWasWritten = true;
}
}
/**
* Returns the PDF version as a name.
* @param version the version character.
*/
public PdfName getVersionAsName(char version) {
switch(version) {
case PdfWriter.VERSION_1_2:
return PdfWriter.PDF_VERSION_1_2;
case PdfWriter.VERSION_1_3:
return PdfWriter.PDF_VERSION_1_3;
case PdfWriter.VERSION_1_4:
return PdfWriter.PDF_VERSION_1_4;
case PdfWriter.VERSION_1_5:
return PdfWriter.PDF_VERSION_1_5;
case PdfWriter.VERSION_1_6:
return PdfWriter.PDF_VERSION_1_6;
case PdfWriter.VERSION_1_7:
return PdfWriter.PDF_VERSION_1_7;
default:
return PdfWriter.PDF_VERSION_1_4;
}
}
/**
* Returns the version as a byte[].
* @param version the version character
*/
public byte[] getVersionAsByteArray(char version) {
return DocWriter.getISOBytes(getVersionAsName(version).toString().substring(1));
}
/** Adds the version to the Catalog dictionary. */
public void addToCatalog(PdfDictionary catalog) {
if(catalog_version != null) {
catalog.put(PdfName.VERSION, catalog_version);
}
if (extensions != null) {
catalog.put(PdfName.EXTENSIONS, extensions);
}
}
/**
* @see com.lowagie.text.pdf.interfaces.PdfVersion#addDeveloperExtension(com.lowagie.text.pdf.PdfDeveloperExtension)
* @since 2.1.6
*/
public void addDeveloperExtension(PdfDeveloperExtension de) {
if (extensions == null) {
extensions = new PdfDictionary();
}
else {
PdfDictionary extension = extensions.getAsDict(de.getPrefix());
if (extension != null) {
int diff = de.getBaseversion().compareTo(extension.getAsName(PdfName.BASEVERSION));
if (diff < 0)
return;
diff = de.getExtensionLevel() - extension.getAsNumber(PdfName.EXTENSIONLEVEL).intValue();
if (diff <= 0)
return;
}
}
extensions.put(de.getPrefix(), de.getDeveloperExtensions());
}
}