Util/NautilusTools.cs

   1 //
   2 // NautilusTools.cs
   3 //
   4 // Copyright (C) 2004 Joe Gasiorek
   5 // Copyright (C) 2004 Novell, Inc.
   6 //
   7
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining a
  10 // copy of this software and associated documentation files (the "Software"),
  11 // to deal in the Software without restriction, including without limitation
  12 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13 // and/or sell copies of the Software, and to permit persons to whom the
  14 // Software is furnished to do so, subject to the following conditions:
  15 //
  16 // The above copyright notice and this permission notice shall be included in
  17 // all copies or substantial portions of the Software.
  18 //
  19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  24 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  25 // DEALINGS IN THE SOFTWARE.
  26 //
  27
  28 using System;
  29 using System.IO;
  30 using System.Text;
  31 using System.Xml;
  32 using System.Collections;
  33 using System.Collections.Specialized;
  34 using System.Text.RegularExpressions;
  35 using System.Runtime.InteropServices;
  36
  37 namespace Beagle.Util {
  38
  39         public class NautilusTools {
  40
  41                 private class XmlDocCacheItem {
  42                         public XmlDocument doc;
  43                         public DateTime timestamp;
  44                 }
  45
  46                 static private Hashtable cache = new Hashtable ();
  47
  48                 private NautilusTools () { } // This class is static
  49
  50                 static private string GetMetaFileName (string path)
  51                 {
  52                         string nautilusDir = Environment.GetEnvironmentVariable ("HOME") +
  53                                 "/.nautilus/metafiles/file:%2F%2F";
  54
  55                         if (path.StartsWith ("file://"))
  56                                 path = path.Substring ("file://".Length);
  57                         path = Path.GetDirectoryName (Path.GetFullPath (path));
  58                         path = path.Replace ("/", "%2F");
  59
  60                         string name = nautilusDir + path + ".xml";
  61
  62                         // If the filename is too long, ignore it.
  63                         if (Path.GetFileName (name).Length > 255)
  64                                 return null;
  65
  66                         return File.Exists (name) ? name : null;
  67                 }
  68
  69                 static public DateTime GetMetaFileTime (string path)
  70                 {
  71                         path = GetMetaFileName (path);
  72                         return path != null ? File.GetLastWriteTime (path) : new DateTime ();
  73                 }
  74
  75                 static private XmlNode GetMetaFileNode (string path)
  76                 {
  77                         string metaFile = GetMetaFileName (path);
  78                         if (metaFile == null)
  79                                 return null;
  80
  81                         DateTime lastWrite = File.GetLastWriteTime (metaFile);
  82
  83                         string name = Path.GetFileName (path);
  84
  85                         XmlDocCacheItem cached = (XmlDocCacheItem) cache [metaFile];
  86                         XmlDocument doc;
  87                         if (cached == null || lastWrite > cached.timestamp) {
  88                                 doc = new XmlDocument ();
  89                                 doc.Load (new StreamReader (metaFile));
  90
  91                                 cached = new XmlDocCacheItem ();
  92                                 cached.doc = doc;
  93                                 cached.timestamp = lastWrite;
  94                                 cache [metaFile] = cached;
  95
  96                         } else {
  97                                 doc = cached.doc;
  98                         }
  99
 100                         string xpath = String.Format ("/directory/file[@name=\"{0}\"]", StringFu.HexEscape (name));
 101                         return doc.SelectSingleNode (xpath);
 102                 }
 103
 104                 static public string GetEmblem (string path)
 105                 {
 106                         XmlNode node = GetMetaFileNode (path);
 107                         if (node == null)
 108                                 return null;
 109                         XmlNode subnode = node.SelectSingleNode ("keyword");
 110                         if (subnode == null)
 111                                 return null;
 112
 113                         XmlNode attr = subnode.Attributes.GetNamedItem ("name");
 114                         return attr != null ? attr.Value : null;
 115                 }
 116
 117                 static public string GetNotes (string path)
 118                 {
 119                         XmlNode node = GetMetaFileNode (path);
 120                         if (node == null)
 121                                 return null;
 122                         XmlNode attr = node.Attributes.GetNamedItem ("annotation");
 123                         return attr != null ? attr.Value : null;
 124                 }
 125         }
 126 }