Filters/FilterSpreadsheet.cs

   1 //
   2 // FilterSpreadSheet.cs
   3 //
   4 // Copyright (C) 2004 Novell, Inc.
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a
   9 // copy of this software and associated documentation files (the "Software"),
  10 // to deal in the Software without restriction, including without limitation
  11 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12 // and/or sell copies of the Software, and to permit persons to whom the
  13 // Software is furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24 // DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.Diagnostics;
  29 using System.IO;
  30 using System.Xml;
  31
  32 using Beagle.Util;
  33 using Beagle.Daemon;
  34
  35 namespace Beagle.Filters {
  36
  37         public class FilterSpreadsheet : Filter {
  38
  39                 XmlTextReader xmlReader;
  40                 bool ignoredFirst2lines = false;
  41                 public FilterSpreadsheet ()
  42                 {
  43                         SnippetMode = true;
  44                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("application/x-gnumeric"));
  45                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("application/csv"));
  46                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("application/tab-separated-values"));
  47                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("text/comma-separated-values"));
  48                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("text/csv"));
  49                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("text/spreadsheet"));
  50                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("text/tab-separated-values"));
  51                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("text/x-comma-separated-values"));
  52                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("application/vnd.ms-excel"));
  53                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("application/excel"));
  54                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("application/x-msexcel"));
  55                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("application/x-excel"));
  56                 }
  57
  58                 void WalkContentNodes (XmlReader reader)
  59                 {
  60                         while (reader.Read ()) {
  61                                 switch (reader.NodeType) {
  62                                 case XmlNodeType.Text:
  63                                         AppendText (reader.Value);
  64                                         AppendStructuralBreak ();
  65                                         break;
  66                                 }
  67                         }
  68                 }
  69
  70                 override protected void DoOpen (FileInfo info)
  71                 {
  72                         ignoredFirst2lines = false;
  73                 }
  74
  75                 override protected void DoPull ()
  76                 {
  77                         // create new external process
  78                         SafeProcess pc = new SafeProcess ();
  79                         pc.Arguments = new string [] { "ssindex", "-i", FileInfo.FullName };
  80                         pc.RedirectStandardOutput = true;
  81
  82                         try {
  83                                 pc.Start ();
  84                         } catch (SafeProcessException e) {
  85                                 Log.Warn (e.Message);
  86                                 Error ();
  87                                 return;
  88                         }
  89
  90                         // process ssindex output
  91                         StreamReader pout = new StreamReader (pc.StandardOutput);
  92                         if (!ignoredFirst2lines) {
  93                                 pout.ReadLine ();
  94                                 pout.ReadLine ();
  95                                 xmlReader = new XmlTextReader (pout);
  96                                 ignoredFirst2lines = true;
  97                         }
  98
  99                         try {
 100                                 WalkContentNodes (xmlReader);
 101                         } catch (Exception e) {
 102                                 Logger.Log.Debug ("Exception occurred while indexing {0}.", FileInfo.FullName);
 103                                 Logger.Log.Debug (e);
 104                         }
 105
 106                         pout.Close ();
 107                         pc.Close ();
 108
 109                         Finished ();
 110                 }
 111
 112                 override protected void DoClose ()
 113                 {
 114                         if (xmlReader != null)
 115                                 xmlReader.Close ();
 116                 }
 117         }
 118 }
 119