FdfWriter.cs | searchcode

/ITextSharp.Silverlight/iTextSharp/text/pdf/FdfWriter.cs

#
C# | 345 lines | 222 code | 21 blank | 102 comment | 45 complexity | a8fba3eb12877a2f507ebfe448934619 MD5 | raw file

using System;

using System.util;

using System.IO;

using System.Collections.Generic;



/*

 * This file is part of the iText project.

 * Copyright (c) 1998-2009 1T3XT BVBA

 * Authors: Bruno Lowagie, Paulo Soares, et al.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU Affero General Public License version 3

 * as published by the Free Software Foundation with the addition of the

 * following permission added to Section 15 as permitted in Section 7(a):

 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,

 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.

 *

 * This program 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 Affero General Public License for more details.

 * You should have received a copy of the GNU Affero General Public License

 * along with this program; if not, see http://www.gnu.org/licenses or write to

 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

 * Boston, MA, 02110-1301 USA, or download the license from the following URL:

 * http://itextpdf.com/terms-of-use/

 *

 * The interactive user interfaces in modified source and object code versions

 * of this program must display Appropriate Legal Notices, as required under

 * Section 5 of the GNU Affero General Public License.

 *

 * In accordance with Section 7(b) of the GNU Affero General Public License,

 * you must retain the producer line in every PDF that is created or manipulated

 * using iText.

 *

 * You can be released from the requirements of the license by purchasing

 * a commercial license. Buying such a license is mandatory as soon as you

 * develop commercial activities involving the iText software without

 * disclosing the source code of your own applications.

 * These activities include: offering paid services to customers as an ASP,

 * serving PDFs on the fly in a web application, shipping iText with a closed

 * source product.

 *

 * For more information, please contact iText Software Corp. at this

 * address: sales@itextpdf.com

 */

namespace iTextSharp.text.pdf {

    /** Writes an FDF form.

    * @author Paulo Soares

    */

    public class FdfWriter {

        private static readonly byte[] HEADER_FDF = DocWriter.GetISOBytes("%FDF-1.4\n%\u00e2\u00e3\u00cf\u00d3\n");

        Dictionary<String, Object> fields = new Dictionary<string,object>();



        /** The PDF file associated with the FDF. */

        private String file;

        

        /** Creates a new FdfWriter. */    

        public FdfWriter() {

        }



        /** Writes the content to a stream.

        * @param os the stream

        * @throws DocumentException on error

        * @throws IOException on error

        */    

        public void WriteTo(Stream os) {

            Wrt wrt = new Wrt(os, this);

            wrt.WriteTo();

        }

        

        internal bool SetField(String field, PdfObject value) {

            Dictionary<String, Object> map = fields;

            StringTokenizer tk = new StringTokenizer(field, ".");

            if (!tk.HasMoreTokens())

                return false;

            while (true) {

                String s = tk.NextToken();

                Object obj;

                map.TryGetValue(s, out obj);

                if (tk.HasMoreTokens()) {

                    if (obj == null) {

                        obj = new Dictionary<String, Object>();

                        map[s] = obj;

                        map = (Dictionary<string,object>)obj;

                        continue;

                    }

                    else if (obj is Dictionary<String, Object>)

                        map = (Dictionary<String, Object>)obj;

                    else

                        return false;

                }

                else {

                    if (!(obj is Dictionary<String, Object>)) {

                        map[s] = value;

                        return true;

                    }

                    else

                        return false;

                }

            }

        }

        

        internal void IterateFields(Dictionary<String, Object> values, Dictionary<String, Object> map, String name) {

            foreach (KeyValuePair<String, Object> entry in map) {

                String s = entry.Key;

                Object obj = entry.Value;

                if (obj is Dictionary<String, Object>)

                    IterateFields(values, (Dictionary<String, Object>)obj, name + "." + s);

                else

                    values[(name + "." + s).Substring(1)] = obj;

            }

        }

        

        /** Removes the field value.

        * @param field the field name

        * @return <CODE>true</CODE> if the field was found and removed,

        * <CODE>false</CODE> otherwise

        */    

        public bool RemoveField(String field) {

            Dictionary<String, Object> map = fields;

            StringTokenizer tk = new StringTokenizer(field, ".");

            if (!tk.HasMoreTokens())

                return false;

            List<object> hist = new List<object>();

            while (true) {

                String s = tk.NextToken();

                Object obj;

                map.TryGetValue(s, out obj);

                if (obj == null)

                    return false;

                hist.Add(map);

                hist.Add(s);

                if (tk.HasMoreTokens()) {

                    if (obj is Dictionary<String, Object>)

                        map = (Dictionary<String, Object>)obj;

                    else

                        return false;

                }

                else {

                    if (obj is Dictionary<String, Object>)

                        return false;

                    else

                        break;

                }

            }

            for (int k = hist.Count - 2; k >= 0; k -= 2) {

                map = (Dictionary<String, Object>)hist[k];

                String s = (String)hist[k + 1];

                map.Remove(s);

                if (map.Count > 0)

                    break;

            }

            return true;

        }

        

        /** Gets all the fields. The map is keyed by the fully qualified

        * field name and the values are <CODE>PdfObject</CODE>.

        * @return a map with all the fields

        */    

        public Dictionary<String, Object> GetFields() {

            Dictionary<String, Object> values = new Dictionary<String, Object>();

            IterateFields(values, fields, "");

            return values;

        }

        

        /** Gets the field value.

        * @param field the field name

        * @return the field value or <CODE>null</CODE> if not found

        */    

        public String GetField(String field) {

            Dictionary<String, Object> map = fields;

            StringTokenizer tk = new StringTokenizer(field, ".");

            if (!tk.HasMoreTokens())

                return null;

            while (true) {

                String s = tk.NextToken();

                Object obj;

                map.TryGetValue(s, out obj);

                if (obj == null)

                    return null;

                if (tk.HasMoreTokens()) {

                    if (obj is Dictionary<String, Object>)

                        map = (Dictionary<String, Object>)obj;

                    else

                        return null;

                }

                else {

                    if (obj is Dictionary<String, Object>)

                        return null;

                    else {

                        if (((PdfObject)obj).IsString())

                            return ((PdfString)obj).ToUnicodeString();

                        else

                            return PdfName.DecodeName(obj.ToString());

                    }

                }

            }

        }

        

        /** Sets the field value as a name.

        * @param field the fully qualified field name

        * @param value the value

        * @return <CODE>true</CODE> if the value was inserted,

        * <CODE>false</CODE> if the name is incompatible with

        * an existing field

        */    

        public bool SetFieldAsName(String field, String value) {

            return SetField(field, new PdfName(value));

        }

        

        /** Sets the field value as a string.

        * @param field the fully qualified field name

        * @param value the value

        * @return <CODE>true</CODE> if the value was inserted,

        * <CODE>false</CODE> if the name is incompatible with

        * an existing field

        */    

        public bool SetFieldAsString(String field, String value) {

            return SetField(field, new PdfString(value, PdfObject.TEXT_UNICODE));

        }

        

        /**

         * Sets the field value as a <CODE>PDFAction</CODE>. 

         * For example, this method allows setting a form submit button action using {@link PdfAction#createSubmitForm(String, Object[], int)}.

         * This method creates an <CODE>A</CODE> entry for the specified field in the underlying FDF file.

         * Method contributed by Philippe Laflamme (plaflamme)

         * @param field the fully qualified field name

         * @param action the field's action

         * @return <CODE>true</CODE> if the value was inserted,

         * <CODE>false</CODE> if the name is incompatible with

         * an existing field

         * @since	2.1.5

         */

        public bool SetFieldAsAction(String field, PdfAction action) {

            return SetField(field, action);

        }

    

        /** Sets all the fields from this <CODE>FdfReader</CODE>

        * @param fdf the <CODE>FdfReader</CODE>

        */    

        public void SetFields(FdfReader fdf) {

            Dictionary<String, PdfDictionary> map = fdf.Fields;

            foreach (KeyValuePair<string,PdfDictionary> entry in map) {

                String key = entry.Key;

                PdfDictionary dic = entry.Value;

                PdfObject v = dic.Get(PdfName.V);

                if (v != null) {

                    SetField(key, v);

                }

                v = dic.Get(PdfName.A); // (plaflamme)

                if (v != null) {

            	    SetField(key, v);

                }

            }

        }

        

        /** Sets all the fields from this <CODE>PdfReader</CODE>

        * @param pdf the <CODE>PdfReader</CODE>

        */    

        public void SetFields(PdfReader pdf) {

            SetFields(pdf.AcroFields);

        }

        

        /** Sets all the fields from this <CODE>AcroFields</CODE>

        * @param acro the <CODE>AcroFields</CODE>

        */    

        public void SetFields(AcroFields af) {

            foreach (KeyValuePair<string,AcroFields.Item> entry in af.Fields) {

                String fn = entry.Key;

                AcroFields.Item item = entry.Value;

                PdfDictionary dic = item.GetMerged(0);

                PdfObject v = PdfReader.GetPdfObjectRelease(dic.Get(PdfName.V));

                if (v == null)

                    continue;

                PdfObject ft = PdfReader.GetPdfObjectRelease(dic.Get(PdfName.FT));

                if (ft == null || PdfName.SIG.Equals(ft))

                    continue;

                SetField(fn, v);

            }

        }

        

        /** Gets the PDF file name associated with the FDF.

        * @return the PDF file name associated with the FDF

        */

        public String File {

            get {

                return this.file;

            }

            set {

                file = value;

            }

        }

                

        internal class Wrt : PdfWriter {

            private FdfWriter fdf;

           

            internal Wrt(Stream os, FdfWriter fdf) : base(new PdfDocument(), os) {

                this.fdf = fdf;

                this.os.Write(HEADER_FDF, 0, HEADER_FDF.Length);

                body = new PdfBody(this);

            }

            

            internal void WriteTo() {

                PdfDictionary dic = new PdfDictionary();

                dic.Put(PdfName.FIELDS, Calculate(fdf.fields));

                if (fdf.file != null)

                    dic.Put(PdfName.F, new PdfString(fdf.file, PdfObject.TEXT_UNICODE));

                PdfDictionary fd = new PdfDictionary();

                fd.Put(PdfName.FDF, dic);

                PdfIndirectReference refi = AddToBody(fd).IndirectReference;

                byte[] b = GetISOBytes("trailer\n");

                os.Write(b, 0, b.Length);

                PdfDictionary trailer = new PdfDictionary();

                trailer.Put(PdfName.ROOT, refi);

                trailer.ToPdf(null, os);

                b = GetISOBytes("\n%%EOF\n");

                os.Write(b, 0, b.Length);

                os.Close();

            }

            

            

            internal PdfArray Calculate(Dictionary<String, Object> map) {

                PdfArray ar = new PdfArray();

                foreach (KeyValuePair<String, Object> entry in map) {

                    String key = entry.Key;

                    Object v = entry.Value;

                    PdfDictionary dic = new PdfDictionary();

                    dic.Put(PdfName.T, new PdfString(key, PdfObject.TEXT_UNICODE));

                    if (v is Dictionary<String, Object>) {

                        dic.Put(PdfName.KIDS, Calculate((Dictionary<String, Object>)v));

                    }

                    else if (v is PdfAction) {	// (plaflamme)

                        dic.Put(PdfName.A, (PdfAction)v);

                    }

                    else {

                        dic.Put(PdfName.V, (PdfObject)v);

                    }

                    ar.Add(dic);

                }

                return ar;

            }

        }

    }

}