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