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324
iTechSharp/iTextSharp/text/pdf/FdfWriter.cs
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324
iTechSharp/iTextSharp/text/pdf/FdfWriter.cs
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using System;
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using System.util;
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using System.IO;
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using System.Collections;
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/*
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* Copyright 2003 by Paulo Soares.
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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) 2000, 2001, 2002 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.pdf {
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/** Writes an FDF form.
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* @author Paulo Soares (psoares@consiste.pt)
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*/
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public class FdfWriter {
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private static readonly byte[] HEADER_FDF = DocWriter.GetISOBytes("%FDF-1.2\n%\u00e2\u00e3\u00cf\u00d3\n");
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Hashtable fields = new Hashtable();
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/** The PDF file associated with the FDF. */
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private String file;
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/** Creates a new FdfWriter. */
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public FdfWriter() {
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}
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/** Writes the content to a stream.
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* @param os the stream
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* @throws DocumentException on error
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* @throws IOException on error
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*/
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public void WriteTo(Stream os) {
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Wrt wrt = new Wrt(os, this);
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wrt.WriteTo();
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}
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internal bool SetField(String field, PdfObject value) {
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Hashtable map = fields;
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StringTokenizer tk = new StringTokenizer(field, ".");
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if (!tk.HasMoreTokens())
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return false;
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while (true) {
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String s = tk.NextToken();
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Object obj = map[s];
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if (tk.HasMoreTokens()) {
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if (obj == null) {
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obj = new Hashtable();
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map[s] = obj;
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map = (Hashtable)obj;
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continue;
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}
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else if (obj is Hashtable)
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map = (Hashtable)obj;
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else
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return false;
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}
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else {
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if (!(obj is Hashtable)) {
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map[s] = value;
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return true;
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}
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else
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return false;
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}
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}
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}
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internal void IterateFields(Hashtable values, Hashtable map, String name) {
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foreach (DictionaryEntry entry in map) {
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String s = (String)entry.Key;
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Object obj = entry.Value;
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if (obj is Hashtable)
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IterateFields(values, (Hashtable)obj, name + "." + s);
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else
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values[(name + "." + s).Substring(1)] = obj;
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}
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}
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/** Removes the field value.
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* @param field the field name
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* @return <CODE>true</CODE> if the field was found and removed,
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* <CODE>false</CODE> otherwise
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*/
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public bool RemoveField(String field) {
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Hashtable map = fields;
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StringTokenizer tk = new StringTokenizer(field, ".");
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if (!tk.HasMoreTokens())
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return false;
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ArrayList hist = new ArrayList();
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while (true) {
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String s = tk.NextToken();
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Object obj = map[s];
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if (obj == null)
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return false;
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hist.Add(map);
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hist.Add(s);
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if (tk.HasMoreTokens()) {
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if (obj is Hashtable)
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map = (Hashtable)obj;
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else
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return false;
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}
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else {
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if (obj is Hashtable)
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return false;
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else
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break;
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}
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}
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for (int k = hist.Count - 2; k >= 0; k -= 2) {
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map = (Hashtable)hist[k];
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String s = (String)hist[k + 1];
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map.Remove(s);
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if (map.Count > 0)
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break;
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}
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return true;
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}
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/** Gets all the fields. The map is keyed by the fully qualified
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* field name and the values are <CODE>PdfObject</CODE>.
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* @return a map with all the fields
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*/
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public Hashtable GetFields() {
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Hashtable values = new Hashtable();
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IterateFields(values, fields, "");
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return values;
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}
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/** Gets the field value.
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* @param field the field name
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* @return the field value or <CODE>null</CODE> if not found
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*/
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public String GetField(String field) {
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Hashtable map = fields;
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StringTokenizer tk = new StringTokenizer(field, ".");
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if (!tk.HasMoreTokens())
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return null;
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while (true) {
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String s = tk.NextToken();
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Object obj = map[s];
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if (obj == null)
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return null;
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if (tk.HasMoreTokens()) {
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if (obj is Hashtable)
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map = (Hashtable)obj;
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else
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return null;
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}
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else {
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if (obj is Hashtable)
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return null;
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else {
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if (((PdfObject)obj).IsString())
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return ((PdfString)obj).ToUnicodeString();
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else
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return PdfName.DecodeName(obj.ToString());
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}
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}
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}
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}
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/** Sets the field value as a name.
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* @param field the fully qualified field name
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* @param value the value
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* @return <CODE>true</CODE> if the value was inserted,
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* <CODE>false</CODE> if the name is incompatible with
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* an existing field
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*/
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public bool SetFieldAsName(String field, String value) {
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return SetField(field, new PdfName(value));
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}
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/** Sets the field value as a string.
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* @param field the fully qualified field name
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* @param value the value
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* @return <CODE>true</CODE> if the value was inserted,
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* <CODE>false</CODE> if the name is incompatible with
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* an existing field
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*/
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public bool SetFieldAsString(String field, String value) {
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return SetField(field, new PdfString(value, PdfObject.TEXT_UNICODE));
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}
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/** Sets all the fields from this <CODE>FdfReader</CODE>
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* @param fdf the <CODE>FdfReader</CODE>
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*/
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public void SetFields(FdfReader fdf) {
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Hashtable map = fdf.Fields;
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foreach (DictionaryEntry entry in map) {
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String key = (String)entry.Key;
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PdfDictionary dic = (PdfDictionary)entry.Value;
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PdfObject v = dic.Get(PdfName.V);
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if (v != null) {
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SetField(key, v);
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}
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}
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}
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/** Sets all the fields from this <CODE>PdfReader</CODE>
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* @param pdf the <CODE>PdfReader</CODE>
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*/
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public void SetFields(PdfReader pdf) {
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SetFields(pdf.AcroFields);
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}
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/** Sets all the fields from this <CODE>AcroFields</CODE>
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* @param acro the <CODE>AcroFields</CODE>
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*/
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public void SetFields(AcroFields af) {
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foreach (DictionaryEntry entry in af.Fields) {
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String fn = (String)entry.Key;
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AcroFields.Item item = (AcroFields.Item)entry.Value;
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PdfDictionary dic = (PdfDictionary)item.merged[0];
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PdfObject v = PdfReader.GetPdfObjectRelease(dic.Get(PdfName.V));
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if (v == null)
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continue;
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PdfObject ft = PdfReader.GetPdfObjectRelease(dic.Get(PdfName.FT));
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if (ft == null || PdfName.SIG.Equals(ft))
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continue;
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SetField(fn, v);
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}
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}
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/** Gets the PDF file name associated with the FDF.
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* @return the PDF file name associated with the FDF
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*/
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public String File {
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get {
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return this.file;
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}
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set {
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file = value;
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}
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}
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internal class Wrt : PdfWriter {
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private FdfWriter fdf;
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internal Wrt(Stream os, FdfWriter fdf) : base(new PdfDocument(), os) {
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this.fdf = fdf;
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this.os.Write(HEADER_FDF, 0, HEADER_FDF.Length);
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body = new PdfBody(this);
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}
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internal void WriteTo() {
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PdfDictionary dic = new PdfDictionary();
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dic.Put(PdfName.FIELDS, Calculate(fdf.fields));
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if (fdf.file != null)
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dic.Put(PdfName.F, new PdfString(fdf.file, PdfObject.TEXT_UNICODE));
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PdfDictionary fd = new PdfDictionary();
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fd.Put(PdfName.FDF, dic);
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PdfIndirectReference refi = AddToBody(fd).IndirectReference;
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byte[] b = GetISOBytes("trailer\n");
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os.Write(b, 0, b.Length);
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PdfDictionary trailer = new PdfDictionary();
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trailer.Put(PdfName.ROOT, refi);
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trailer.ToPdf(null, os);
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b = GetISOBytes("\n%%EOF\n");
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os.Write(b, 0, b.Length);
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os.Close();
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}
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internal PdfArray Calculate(Hashtable map) {
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PdfArray ar = new PdfArray();
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foreach (DictionaryEntry entry in map) {
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String key = (String)entry.Key;
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Object v = entry.Value;
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PdfDictionary dic = new PdfDictionary();
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dic.Put(PdfName.T, new PdfString(key, PdfObject.TEXT_UNICODE));
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if (v is Hashtable) {
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dic.Put(PdfName.KIDS, Calculate((Hashtable)v));
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}
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else {
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dic.Put(PdfName.V, (PdfObject)v);
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}
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ar.Add(dic);
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}
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return ar;
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}
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}
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}
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}
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