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                         Process pc = new Process ();
  79                         pc.StartInfo.FileName = "ssindex";
  80
  81                         pc.StartInfo.Arguments = String.Format ("-i \"{0}\"", FileInfo.FullName);
  82                         pc.StartInfo.RedirectStandardInput = false;
  83                         pc.StartInfo.RedirectStandardOutput = true;
  84                         pc.StartInfo.UseShellExecute = false;
  85                         try {
  86                                 pc.Start ();
  87                         } catch (System.ComponentModel.Win32Exception) {
  88                                 Logger.Log.Warn ("Unable to find ssindex in path; {0} file not indexed.",
  89                                                  FileInfo.FullName);
  90                                 Finished ();
  91                                 return;
  92                         }
  93
  94                         // process ssindex output
  95                         StreamReader pout = pc.StandardOutput;
  96                         if (!ignoredFirst2lines) {
  97                                 pout.ReadLine ();
  98                                 pout.ReadLine ();
  99                                 xmlReader = new XmlTextReader (pout);
 100                                 ignoredFirst2lines = true;
 101                         }
 102                         try {
 103                                 WalkContentNodes (xmlReader);
 104                         } catch (Exception e) {
 105                                 Logger.Log.Debug ("Exception occurred while indexing {0}.", FileInfo.FullName);
 106                                 Logger.Log.Debug (e);
 107                         }
 108                         pout.Close ();
 109                         pc.WaitForExit ();
 110                         pc.Close ();
 111                         Finished ();
 112                 }
 113
 114                 override protected void DoClose ()
 115                 {
 116                         if (xmlReader != null)
 117                                 xmlReader.Close ();
 118                 }
 119         }
 120 }
 121