/*
* $Id: PdfVersionImp.java 4784 2011-03-15 08:33:00Z blowagie $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2011 1T3XT BVBA
* 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 1T3XT,
* 1T3XT 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: [email protected]
*/
package com.itextpdf.text.pdf.internal;
import java.io.IOException;
import com.itextpdf.text.DocWriter;
import com.itextpdf.text.pdf.OutputStreamCounter;
import com.itextpdf.text.pdf.PdfDeveloperExtension;
import com.itextpdf.text.pdf.PdfDictionary;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.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.itextpdf.text.pdf.interfaces.PdfVersion#setPdfVersion(char)
*/
public void setPdfVersion(char version) {
if (headerWasWritten || appendmode) {
setPdfVersion(getVersionAsName(version));
}
else {
this.header_version = version;
}
}
/**
* @see com.itextpdf.text.pdf.interfaces.PdfVersion#setAtLeastPdfVersion(char)
*/
public void setAtLeastPdfVersion(char version) {
if (version > header_version) {
setPdfVersion(version);
}
}
/**
* @see com.itextpdf.text.pdf.interfaces.PdfVersion#setPdfVersion(com.itextpdf.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.itextpdf.text.pdf.interfaces.PdfVersion#addDeveloperExtension(com.itextpdf.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());
}
}
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