src/GnomeSubtitles/Dialog/SubtitleFileChooserDialog.cs

   1 /*
   2  * This file is part of Gnome Subtitles.
   3  * Copyright (C) 2006-2009 Pedro Castro
   4  *
   5  * Gnome Subtitles 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  * Gnome Subtitles 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 GnomeSubtitles.Core;
  21 using Glade;
  22 using Gtk;
  23 using Mono.Unix;
  24 using System;
  25 using System.Collections;
  26 using System.Text;
  27
  28 namespace GnomeSubtitles.Dialog {
  29
  30 public abstract class SubtitleFileChooserDialog : GladeDialog {
  31         private int fixedEncoding = -1;
  32         private bool isEncodingsChangeSilent = false; //used to indicate whether a change in the encodings list should be taken into account
  33         private ComboBox encodingComboBox = null;
  34
  35         /* Protected variables */
  36         protected new FileChooserDialog dialog = null;
  37
  38         protected string chosenFilename = String.Empty;
  39         protected EncodingDescription chosenEncoding;
  40         protected bool hasChosenEncoding = false;
  41
  42         protected EncodingDescription[] encodings = null;
  43
  44
  45         protected SubtitleFileChooserDialog (string filename) : base(filename) {
  46                 dialog = GetDialog() as FileChooserDialog;
  47
  48                 fixedEncoding = GetFixedEncoding();
  49                 SetEncodingComboBox();
  50         }
  51
  52
  53         /* Public properties */
  54
  55         public string Filename {
  56                 get { return chosenFilename; }
  57         }
  58
  59         public EncodingDescription ChosenEncoding {
  60                 get { return chosenEncoding; }
  61         }
  62
  63         public bool HasChosenEncoding {
  64                 get { return hasChosenEncoding; }
  65         }
  66
  67         /* Protected members */
  68
  69         protected void SetEncodingComboBox () {
  70                 encodingComboBox = GetEncodingComboBox();
  71
  72                 AddInitialEncodingComboBoxItems();
  73                 encodingComboBox.RowSeparatorFunc = SeparatorFunc;
  74                 FillEncodingComboBox(Base.Config.PrefsEncodingsShownInMenu);
  75         }
  76
  77         protected bool SeparatorFunc (TreeModel model, TreeIter iter) {
  78                 string text = (string)model.GetValue(iter, 0);
  79                 return ((text != null) && (text.CompareTo("-") == 0));
  80         }
  81
  82         protected int GetActiveEncodingComboBoxItem () {
  83                 return encodingComboBox.Active;
  84         }
  85
  86         /* Virtual members */
  87
  88         protected virtual int GetFixedEncoding () {
  89                 return -1;
  90         }
  91
  92         protected virtual void AddInitialEncodingComboBoxItems () {
  93         }
  94
  95         /* Abstract members */
  96
  97         protected abstract ComboBox GetEncodingComboBox ();
  98
  99
 100
 101         /* Private members */
 102
 103         private void LoadEncodings (string[] names) {
 104                 ArrayList encodings = new ArrayList();
 105                 bool fixedCodePageInserted = false;
 106
 107                 foreach (string name in names) {
 108                         EncodingDescription description = new EncodingDescription();
 109                         if (Encodings.Find(name, ref description)) {
 110                                 encodings.Add(description);
 111                                 if (description.CodePage == fixedEncoding)
 112                                         fixedCodePageInserted = true;
 113                         }
 114                 }
 115
 116                 /* Insert fixed encoding code page if not already inserted */
 117                 if ((fixedEncoding != -1) && (!fixedCodePageInserted)) {
 118                         EncodingDescription description = new EncodingDescription();
 119                         if (Encodings.Find(fixedEncoding, ref description))
 120                                 encodings.Add(description);
 121                 }
 122
 123                 encodings.Sort();
 124                 encodings.Insert(0, Encodings.SystemDefault);
 125
 126                 this.encodings = (EncodingDescription[])encodings.ToArray(typeof(EncodingDescription));
 127         }
 128
 129         private void FillEncodingComboBox (string[] names) {
 130                 LoadEncodings(names);
 131                 int activeItem = 0;
 132
 133                 int currentItem = 0;
 134                 foreach (EncodingDescription encoding in encodings) {
 135                         encodingComboBox.AppendText(encoding.Description + " (" + encoding.Name + ")");
 136                         if (encoding.CodePage == fixedEncoding) {
 137                                 activeItem = currentItem;
 138                         }
 139                         currentItem++;
 140                 }
 141
 142                 encodingComboBox.AppendText("-");
 143                 encodingComboBox.AppendText(Catalog.GetString("Add or Remove..."));
 144
 145                 encodingComboBox.Active = activeItem;
 146         }
 147
 148         private void UpdateEncodingComboBox (ComboBox comboBox, string[] names) {
 149                 isEncodingsChangeSilent = true;
 150
 151                 /* Get the first elements that are not in the model */
 152                 int itemCount = comboBox.Model.IterNChildren();
 153                 int knownCount = encodings.Length + 2; //Add 2 for horizontal bar and item at the end
 154                 int remainingCount = itemCount - knownCount;
 155
 156                 string[] remainingItems = new string[remainingCount];
 157                 int rowNumber = 0;
 158                 ListStore store = comboBox.Model as ListStore;
 159                 foreach (object[] row in store) {
 160                         if (rowNumber == remainingCount)
 161                                 break;
 162
 163                         remainingItems[rowNumber] = row[0] as string;
 164                         rowNumber++;
 165                 }
 166
 167                 store.Clear();
 168
 169                 foreach (string item in remainingItems)
 170                         comboBox.AppendText(item);
 171
 172                 FillEncodingComboBox(names);
 173
 174                 isEncodingsChangeSilent = false;
 175         }
 176
 177         #pragma warning disable 169             //Disables warning about handlers not being used
 178
 179         private void OnEncodingComboBoxChanged (object o, EventArgs args) {
 180                 if (isEncodingsChangeSilent)
 181                         return;
 182
 183                 ComboBox comboBox = o as ComboBox;
 184                 int itemCount = comboBox.Model.IterNChildren();
 185                 if (comboBox.Active == (itemCount - 1)) {
 186                         EncodingsDialog dialog = Base.Dialogs.Get(typeof(EncodingsDialog)) as EncodingsDialog;
 187                         dialog.Show();
 188                         dialog.WaitForResponse();
 189                         UpdateEncodingComboBox(comboBox, dialog.ChosenNames);
 190                 }
 191
 192         }
 193
 194 }
 195
 196 }