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Devin Jankowski
2023-06-21 12:46:23 -04:00
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iTechSharp/iTextSharp/text/rtf/parser/destinations/RtfDestinationMgr.cs Normal file
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using System;
using System.Collections;
using System.Reflection;
using iTextSharp.text.rtf.parser;
using iTextSharp.text.rtf.parser.ctrlwords;
/*
* $Id: RtfDestinationMgr.cs,v 1.4 2008/05/13 11:26:00 psoares33 Exp $
*
*
* Copyright 2007 by Howard Shank
*
* 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) 1999-2006 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000-2006 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.rtf.parser.destinations {
/**
* <code>RtfDestinationMgr</code> manages destination objects for the parser
*
* @author Howard Shank (hgshank@yahoo.com)
* @since 2.0.8
*/
public sealed class RtfDestinationMgr {
/*
* Destinations
*/
private static RtfDestinationMgr instance = null;
/**
* CtrlWord <-> Destination map object.
*
* Maps control words to their destinations objects.
* Null destination is a special destination used for
* discarding unwanted data. This is primarily used when
* skipping groups, binary data or unwanted/unknown data.
*/
private static Hashtable destinations = new Hashtable(300, 0.95f);
/**
* Destination objects.
* There is only one of each destination.
*/
private static Hashtable destinationObjects = new Hashtable(10, 0.95f);
private static bool ignoreUnknownDestinations = false;
private static RtfParser rtfParser = null;
/**
* String representation of null destination.
*/
public const String DESTINATION_NULL = "null";
/**
* String representation of document destination.
*/
public const String DESTINATION_DOCUMENT = "document";
/**
* Hidden default constructor becuase
*/
private RtfDestinationMgr() {
}
public static void SetParser(RtfParser parser) {
rtfParser = parser;
}
public static RtfDestinationMgr GetInstance() {
lock(destinations) {
if (instance == null) {
instance = new RtfDestinationMgr();
// 2 required destinations for all documents
RtfDestinationMgr.AddDestination(RtfDestinationMgr.DESTINATION_DOCUMENT, new Object[] { "RtfDestinationDocument", "" } );
RtfDestinationMgr.AddDestination(RtfDestinationMgr.DESTINATION_NULL, new Object[] { "RtfDestinationNull", "" } );
}
return instance;
}
}
public static RtfDestinationMgr GetInstance(RtfParser parser) {
lock(destinations) {
RtfDestinationMgr.SetParser(parser);
if (instance == null) {
instance = new RtfDestinationMgr();
// 2 required destinations for all documents
RtfDestinationMgr.AddDestination(RtfDestinationMgr.DESTINATION_DOCUMENT, new Object[] { "RtfDestinationDocument", "" } );
RtfDestinationMgr.AddDestination(RtfDestinationMgr.DESTINATION_NULL, new Object[] { "RtfDestinationNull", "" } );
}
return instance;
}
}
public static RtfDestination GetDestination(String destination) {
RtfDestination dest = null;
if (destinations.ContainsKey(destination)) {
dest = (RtfDestination)destinations[destination];
} else {
if (ignoreUnknownDestinations) {
dest = (RtfDestination)destinations[DESTINATION_NULL];
} else {
dest = (RtfDestination)destinations[DESTINATION_DOCUMENT];
}
}
dest.SetParser(RtfDestinationMgr.rtfParser);
return dest;
}
public static bool AddDestination(String destination, Object[] args) {
if (destinations.ContainsKey(destination)) {
return true;
}
String thisClass = "iTextSharp.text.rtf.parser.destinations." + (String)args[0];
if (thisClass.IndexOf("RtfDestinationNull") >= 0) {
destinations[destination] = RtfDestinationNull.GetInstance();
return true;
}
Type value = null;
try {
value = Type.GetType(thisClass);
} catch {
return false;
}
if (value == null)
return false;
RtfDestination c = null;
if (destinationObjects.ContainsKey(value.Name)) {
c = (RtfDestination)destinationObjects[value.Name];
} else {
try {
c = (RtfDestination)value.GetConstructor(BindingFlags.Instance | BindingFlags.Public, null, new Type[0], null).Invoke(null);
} catch {
return false;
}
}
c.SetParser(rtfParser);
if (value.Equals(typeof(RtfDestinationInfo))) {
((RtfDestinationInfo)c).SetElementName(destination);
}
if (value.Equals(typeof(RtfDestinationStylesheetTable))) {
((RtfDestinationStylesheetTable)c).SetElementName(destination);
((RtfDestinationStylesheetTable)c).SetType((String)args[1]);
}
destinations[destination] = c;
destinationObjects[value.Name] = c;
return true;
}
// listener methods
/**
* Adds a <CODE>RtfDestinationListener</CODE> to the appropriate <CODE>RtfDestination</CODE>.
*
* @param destination the destination string for the listener
* @param listener
* the new RtfDestinationListener.
*/
public static bool AddListener(String destination, IRtfDestinationListener listener) {
RtfDestination dest = GetDestination(destination);
if (dest != null) {
return dest.AddListener(listener);
}
return false;
}
/**
* Removes a <CODE>RtfDestinationListener</CODE> from the appropriate <CODE>RtfDestination</CODE>.
*
* @param destination the destination string for the listener
* @param listener
* the RtfCtrlWordListener that has to be removed.
*/
public static bool RemoveListener(String destination, IRtfDestinationListener listener) {
RtfDestination dest = GetDestination(destination);
if (dest != null) {
return dest.RemoveListener(listener);
}
return false;
}
}
}