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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2023 Apryse Group NV
Authors: Apryse Software.
This program is offered under a commercial and under the AGPL license.
For commercial licensing, contact us at https://itextpdf.com/sales. For AGPL licensing, see below.
AGPL licensing:
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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 .
*/
package com.itextpdf.kernel.pdf;
import com.itextpdf.io.font.PdfEncodings;
import com.itextpdf.kernel.xmp.PdfConst;
import com.itextpdf.kernel.xmp.XMPConst;
import com.itextpdf.kernel.xmp.XMPException;
import com.itextpdf.kernel.xmp.XMPMeta;
import com.itextpdf.kernel.xmp.XMPMetaFactory;
import com.itextpdf.kernel.xmp.options.PropertyOptions;
import com.itextpdf.kernel.xmp.properties.XMPProperty;
class XmpMetaInfoConverter {
private XmpMetaInfoConverter() {
}
static void appendMetadataToInfo(byte[] xmpMetadata, PdfDocumentInfo info) {
if (xmpMetadata != null) {
try {
XMPMeta meta = XMPMetaFactory.parseFromBuffer(xmpMetadata);
XMPProperty title = meta.getLocalizedText(XMPConst.NS_DC, PdfConst.Title, XMPConst.X_DEFAULT, XMPConst.X_DEFAULT);
if (title != null) {
info.setTitle(title.getValue());
}
String author = fetchArrayIntoString(meta, XMPConst.NS_DC, PdfConst.Creator);
if (author != null) {
info.setAuthor(author);
}
// We assume that pdf:keywords has precedence over dc:subject
XMPProperty keywords = meta.getProperty(XMPConst.NS_PDF, PdfConst.Keywords);
if (keywords != null) {
info.setKeywords(keywords.getValue());
} else {
String keywordsStr = fetchArrayIntoString(meta, XMPConst.NS_DC, PdfConst.Subject);
if (keywordsStr != null) {
info.setKeywords(keywordsStr);
}
}
XMPProperty subject = meta.getLocalizedText(XMPConst.NS_DC, PdfConst.Description, XMPConst.X_DEFAULT, XMPConst.X_DEFAULT);
if (subject != null) {
info.setSubject(subject.getValue());
}
XMPProperty creator = meta.getProperty(XMPConst.NS_XMP, PdfConst.CreatorTool);
if (creator != null) {
info.setCreator(creator.getValue());
}
XMPProperty producer = meta.getProperty(XMPConst.NS_PDF, PdfConst.Producer);
if (producer != null) {
info.put(PdfName.Producer, new PdfString(producer.getValue(), PdfEncodings.UNICODE_BIG));
}
XMPProperty trapped = meta.getProperty(XMPConst.NS_PDF, PdfConst.Trapped);
if (trapped != null) {
info.setTrapped(new PdfName(trapped.getValue()));
}
} catch (XMPException ignored) {
}
}
}
static void appendDocumentInfoToMetadata(PdfDocumentInfo info, XMPMeta xmpMeta) throws XMPException {
PdfDictionary docInfo = info.getPdfObject();
if (docInfo != null) {
PdfName key;
PdfObject obj;
String value;
for (PdfName pdfName : docInfo.keySet()) {
key = pdfName;
obj = docInfo.get(key);
if (obj == null)
continue;
if (obj.isString()) {
value = ((PdfString) obj).toUnicodeString();
} else if (obj.isName()) {
value = ((PdfName)obj).getValue();
} else {
continue;
}
if (PdfName.Title.equals(key)) {
xmpMeta.setLocalizedText(XMPConst.NS_DC, PdfConst.Title, XMPConst.X_DEFAULT, XMPConst.X_DEFAULT, value);
} else if (PdfName.Author.equals(key)) {
for (String v : value.split(",|;")) {
if (v.trim().length() > 0) {
appendArrayItemIfDoesNotExist(xmpMeta, XMPConst.NS_DC, PdfConst.Creator, v.trim(), PropertyOptions.ARRAY_ORDERED);
}
}
} else if (PdfName.Subject.equals(key)) {
xmpMeta.setLocalizedText(XMPConst.NS_DC, PdfConst.Description, XMPConst.X_DEFAULT, XMPConst.X_DEFAULT, value);
} else if (PdfName.Keywords.equals(key)) {
for (String v : value.split(",|;")) {
if (v.trim().length() > 0) {
appendArrayItemIfDoesNotExist(xmpMeta, XMPConst.NS_DC, PdfConst.Subject, v.trim(), PropertyOptions.ARRAY);
}
}
xmpMeta.setProperty(XMPConst.NS_PDF, PdfConst.Keywords, value);
} else if (PdfName.Creator.equals(key)) {
xmpMeta.setProperty(XMPConst.NS_XMP, PdfConst.CreatorTool, value);
} else if (PdfName.Producer.equals(key)) {
xmpMeta.setProperty(XMPConst.NS_PDF, PdfConst.Producer, value);
} else if (PdfName.CreationDate.equals(key)) {
xmpMeta.setProperty(XMPConst.NS_XMP, PdfConst.CreateDate, PdfDate.getW3CDate(value));
} else if (PdfName.ModDate.equals(key)) {
xmpMeta.setProperty(XMPConst.NS_XMP, PdfConst.ModifyDate, PdfDate.getW3CDate(value));
} else if (PdfName.Trapped.equals(key)) {
xmpMeta.setProperty(XMPConst.NS_PDF, PdfConst.Trapped, value);
}
}
}
}
private static void appendArrayItemIfDoesNotExist(XMPMeta meta, String ns, String arrayName, String value, int arrayOption) throws XMPException {
int currentCnt = meta.countArrayItems(ns, arrayName);
for (int i = 0; i < currentCnt; i++) {
XMPProperty item = meta.getArrayItem(ns, arrayName, i + 1);
if (value.equals(item.getValue())) {
return;
}
}
meta.appendArrayItem(ns, arrayName, new PropertyOptions(arrayOption), value, null);
}
private static String fetchArrayIntoString(XMPMeta meta, String ns, String arrayName) throws XMPException {
int keywordsCnt = meta.countArrayItems(ns, arrayName);
StringBuilder sb = null;
for (int i = 0; i < keywordsCnt; i++) {
XMPProperty curKeyword = meta.getArrayItem(ns, arrayName, i + 1);
if (sb == null) {
sb = new StringBuilder();
} else if (sb.length() > 0) {
sb.append("; ");
}
sb.append(curKeyword.getValue());
}
return sb != null ? sb.toString() : null;
}
}
