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iTechSharp/iTextSharp/text/pdf/FdfReader.cs
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218
iTechSharp/iTextSharp/text/pdf/FdfReader.cs
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using System;
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using System.Text;
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using System.Collections;
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using System.Net;
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using System.IO;
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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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/** Reads an FDF form and makes the fields available
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* @author Paulo Soares (psoares@consiste.pt)
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*/
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public class FdfReader : PdfReader {
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internal Hashtable fields;
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internal String fileSpec;
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internal PdfName encoding;
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/** Reads an FDF form.
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* @param filename the file name of the form
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* @throws IOException on error
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*/
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public FdfReader(String filename) : base(filename) {
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}
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/** Reads an FDF form.
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* @param pdfIn the byte array with the form
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* @throws IOException on error
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*/
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public FdfReader(byte[] pdfIn) : base(pdfIn) {
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}
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/** Reads an FDF form.
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* @param url the URL of the document
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* @throws IOException on error
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*/
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public FdfReader(Uri url) : base(url) {
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}
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/** Reads an FDF form.
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* @param is the <CODE>InputStream</CODE> containing the document. The stream is read to the
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* end but is not closed
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* @throws IOException on error
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*/
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public FdfReader(Stream isp) : base(isp) {
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}
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protected internal override void ReadPdf() {
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fields = new Hashtable();
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try {
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tokens.CheckFdfHeader();
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RebuildXref();
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ReadDocObj();
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}
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finally {
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try {
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tokens.Close();
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}
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catch {
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// empty on purpose
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}
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}
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ReadFields();
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}
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protected virtual void KidNode(PdfDictionary merged, String name) {
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PdfArray kids = (PdfArray)GetPdfObject(merged.Get(PdfName.KIDS));
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if (kids == null || kids.ArrayList.Count == 0) {
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if (name.Length > 0)
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name = name.Substring(1);
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fields[name] = merged;
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}
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else {
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merged.Remove(PdfName.KIDS);
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ArrayList ar = kids.ArrayList;
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for (int k = 0; k < ar.Count; ++k) {
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PdfDictionary dic = new PdfDictionary();
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dic.Merge(merged);
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PdfDictionary newDic = (PdfDictionary)GetPdfObject((PdfObject)ar[k]);
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PdfString t = (PdfString)GetPdfObject(newDic.Get(PdfName.T));
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String newName = name;
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if (t != null)
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newName += "." + t.ToUnicodeString();
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dic.Merge(newDic);
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dic.Remove(PdfName.T);
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KidNode(dic, newName);
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}
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}
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}
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protected virtual void ReadFields() {
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catalog = (PdfDictionary)GetPdfObject(trailer.Get(PdfName.ROOT));
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PdfDictionary fdf = (PdfDictionary)GetPdfObject(catalog.Get(PdfName.FDF));
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if (fdf == null)
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return;
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PdfString fs = (PdfString)GetPdfObject(fdf.Get(PdfName.F));
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if (fs != null)
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fileSpec = fs.ToUnicodeString();
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PdfArray fld = (PdfArray)GetPdfObject(fdf.Get(PdfName.FIELDS));
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if (fld == null)
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return;
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encoding = (PdfName)GetPdfObject(fdf.Get(PdfName.ENCODING));
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PdfDictionary merged = new PdfDictionary();
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merged.Put(PdfName.KIDS, fld);
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KidNode(merged, "");
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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 value is a merged <CODE>PdfDictionary</CODE>
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* with the field content.
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* @return all the fields
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*/
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public Hashtable Fields {
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get {
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return fields;
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}
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}
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/** Gets the field dictionary.
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* @param name the fully qualified field name
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* @return the field dictionary
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*/
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public PdfDictionary GetField(String name) {
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return (PdfDictionary)fields[name];
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}
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/** Gets the field value or <CODE>null</CODE> if the field does not
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* exist or has no value defined.
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* @param name the fully qualified field name
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* @return the field value or <CODE>null</CODE>
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*/
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public String GetFieldValue(String name) {
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PdfDictionary field = (PdfDictionary)fields[name];
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if (field == null)
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return null;
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PdfObject v = GetPdfObject(field.Get(PdfName.V));
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if (v == null)
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return null;
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if (v.IsName())
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return PdfName.DecodeName(((PdfName)v).ToString());
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else if (v.IsString()) {
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PdfString vs = (PdfString)v;
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if (encoding == null || vs.Encoding != null)
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return vs.ToUnicodeString();
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byte[] b = vs.GetBytes();
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if (b.Length >= 2 && b[0] == (byte)254 && b[1] == (byte)255)
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return vs.ToUnicodeString();
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try {
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if (encoding.Equals(PdfName.SHIFT_JIS))
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return Encoding.GetEncoding(932).GetString(b);
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else if (encoding.Equals(PdfName.UHC))
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return Encoding.GetEncoding(949).GetString(b);
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else if (encoding.Equals(PdfName.GBK))
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return Encoding.GetEncoding(936).GetString(b);
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else if (encoding.Equals(PdfName.BIGFIVE))
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return Encoding.GetEncoding(950).GetString(b);
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}
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catch {
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}
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return vs.ToUnicodeString();
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}
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return null;
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}
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/** Gets the PDF file specification contained in the FDF.
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* @return the PDF file specification contained in the FDF
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*/
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public String FileSpec {
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get {
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return fileSpec;
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}
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}
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}
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}
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