168 lines
6.6 KiB
C#
168 lines
6.6 KiB
C#
using System;
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using System.IO;
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using System.Xml;
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using System.Text;
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/*
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* Copyright 2008 by Bruno Lowagie
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* (the "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the License.
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*
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* The Original Code is 'iText, a free JAVA-PDF library'.
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*
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* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
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* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
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* All Rights Reserved.
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* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
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* are Copyright (C) 2008 by Paulo Soares. All Rights Reserved.
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*
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* Contributor(s): all the names of the contributors are added in the source code
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* where applicable.
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*
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* Alternatively, the contents of this file may be used under the terms of the
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* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
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* provisions of LGPL are applicable instead of those above. If you wish to
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* allow use of your version of this file only under the terms of the LGPL
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* License and not to allow others to use your version of this file under
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* the MPL, indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by the LGPL.
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* If you do not delete the provisions above, a recipient may use your version
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* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the MPL as stated above or under the terms of the GNU
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* Library General Public License as published by the Free Software Foundation;
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* either version 2 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
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* details.
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*
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* If you didn't download this code from the following link, you should check if
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* you aren't using an obsolete version:
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* http://www.lowagie.com/iText/
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*/
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namespace iTextSharp.text.xml.xmp {
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/**
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* Reads an XMP stream into an org.w3c.dom.Document objects.
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* Allows you to replace the contents of a specific tag.
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* @since 2.1.3
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*/
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public class XmpReader {
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private XmlDocument domDocument;
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/**
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* Constructs an XMP reader
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* @param bytes the XMP content
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* @throws ExceptionConverter
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* @throws IOException
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* @throws SAXException
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*/
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public XmpReader(byte[] bytes) {
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MemoryStream bout = new MemoryStream();
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bout.Write(bytes, 0, bytes.Length);
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bout.Seek(0, SeekOrigin.Begin);
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XmlTextReader xtr = new XmlTextReader(bout);
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domDocument = new XmlDocument();
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domDocument.PreserveWhitespace = true;
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domDocument.Load(xtr);
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}
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/**
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* Replaces the content of a tag.
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* @param namespaceURI the URI of the namespace
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* @param localName the tag name
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* @param value the new content for the tag
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* @return true if the content was successfully replaced
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* @since 2.1.6 the return type has changed from void to boolean
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*/
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public bool Replace(String namespaceURI, String localName, String value) {
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XmlNodeList nodes = domDocument.GetElementsByTagName(localName, namespaceURI);
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XmlNode node;
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if (nodes.Count == 0)
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return false;
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for (int i = 0; i < nodes.Count; i++) {
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node = nodes[i];
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SetNodeText(domDocument, node, value);
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}
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return true;
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}
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/**
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* Adds a tag.
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* @param namespaceURI the URI of the namespace
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* @param parent the tag name of the parent
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* @param localName the name of the tag to add
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* @param value the new content for the tag
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* @return true if the content was successfully added
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* @since 2.1.6
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*/
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public bool Add(String parent, String namespaceURI, String localName, String value) {
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XmlNodeList nodes = domDocument.GetElementsByTagName(parent);
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if (nodes.Count == 0)
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return false;
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XmlNode pNode;
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XmlNode node;
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for (int i = 0; i < nodes.Count; i++) {
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pNode = nodes[i];
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XmlAttributeCollection attrs = pNode.Attributes;
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for (int j = 0; j < attrs.Count; j++) {
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node = attrs[j];
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if (namespaceURI.Equals(node.Value)) {
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node = domDocument.CreateElement(localName);
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node.AppendChild(domDocument.CreateTextNode(value));
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pNode.AppendChild(node);
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return true;
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}
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}
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}
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return false;
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}
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/**
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* Sets the text of this node. All the child's node are deleted and a new
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* child text node is created.
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* @param domDocument the <CODE>Document</CODE> that contains the node
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* @param n the <CODE>Node</CODE> to add the text to
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* @param value the text to add
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*/
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public bool SetNodeText(XmlDocument domDocument, XmlNode n, String value) {
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if (n == null)
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return false;
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XmlNode nc = null;
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while ((nc = n.FirstChild) != null) {
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n.RemoveChild(nc);
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}
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n.AppendChild(domDocument.CreateTextNode(value));
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return true;
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}
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/**
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* Writes the document to a byte array.
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*/
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public byte[] SerializeDoc() {
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MemoryStream fout = new MemoryStream();
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byte[] b = new UTF8Encoding(false).GetBytes(XmpWriter.XPACKET_PI_BEGIN);
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fout.Write(b, 0, b.Length);
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fout.Flush();
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XmlNodeList xmpmeta = domDocument.GetElementsByTagName("x:xmpmeta");
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XmlTextWriter xw = new XmlTextWriter(fout, new UTF8Encoding(false));
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xw.WriteNode(new XmlNodeReader(xmpmeta[0]), true);
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xw.Flush();
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b = new UTF8Encoding(false).GetBytes(XmpWriter.XPACKET_PI_END_W);
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fout.Write(b, 0, b.Length);
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fout.Close();
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return fout.ToArray();
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}
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}
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} |