src/SubLib/IO/Input/PlainTextParser.cs

   1 /*
   2  * This file is part of SubLib.
   3  * Copyright (C) 2007-2008 Pedro Castro
   4  *
   5  * SubLib is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * SubLib is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18  */
  19
  20 using SubLib.Core.Domain;
  21 using System;
  22 using System.IO;
  23 using System.Text;
  24 using System.Text.RegularExpressions;
  25
  26 namespace SubLib.IO.Input {
  27
  28 internal class PlainTextParser {
  29
  30         private bool withCharacterNames = false;
  31         private string lineSeparator = String.Empty;
  32         private string text = String.Empty;
  33
  34         internal PlainTextParser(bool withCharacterNames, string lineSeparator) {
  35                 this.withCharacterNames = withCharacterNames;
  36                 this.lineSeparator = lineSeparator;
  37         }
  38
  39         internal PlainTextParser(bool withCharacterNames) : this(withCharacterNames, @"\n") {
  40         }
  41         /// <summary>Parses the specified text.</summary>
  42         /// <remarks>The created <see cref="SubtitleCollection" /> will have its <see cref="SubtitleProperties" /> property set to null.
  43         /// It is mandatory to use <see cref="SubtitleCollection.SetPropertiesForAll" /> after.</remarks>
  44         internal ParsingProperties Parse (string text, TimingMode timingMode, Encoding encoding, out SubtitleCollection collection) {
  45
  46                 collection = new SubtitleCollection();
  47                 ParsingProperties properties = new ParsingProperties();
  48                 this.text = text;
  49                 properties.TimingMode = timingMode;
  50
  51                 /* Read the subtitles */
  52                 ReadSubtitles(encoding, properties, collection);
  53
  54                 return properties;
  55         }
  56
  57         private void ReadSubtitles (Encoding encoding, ParsingProperties properties, SubtitleCollection collection) {
  58
  59                 string[] lines = text.Split(new char[] {'\n'});
  60                 for (int i = 0; i < lines.Length; i++) {
  61                         SubtitleText stext = ParseSubtitleText(lines[i]);
  62                         Style style = new Style();
  63                         if(!stext.IsEmpty) {
  64                                 Subtitle subtitle = new Subtitle(null, stext, style);
  65                                 collection.Add(subtitle);
  66                         }
  67                 }
  68
  69         }
  70
  71         private SubtitleText ParseSubtitleText (string line) {
  72                 string text = String.Empty;
  73                 if (withCharacterNames) {
  74                         string[] pieces = line.Split(new char[] { ':' });
  75                         if (pieces.Length > 1)
  76                                 text = pieces[1];
  77                         else
  78                                 text = pieces[0];
  79                 }
  80                 else
  81                         text = line;
  82
  83                 if (text.Length > 0)
  84                         return new SubtitleText(text, lineSeparator, true);
  85                 else return new SubtitleText();
  86
  87         }
  88
  89 }
  90
  91 }