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
  58                         path = Path.GetFullPath (path);
  59
  60                         if (! Directory.Exists (path))
  61                                 path = Path.GetDirectoryName (path);
  62
  63                         path = path.Replace ("/", "%2F");
  64
  65                         string name = nautilusDir + path + ".xml";
  66
  67                         // If the filename is too long, ignore it.
  68                         if (Path.GetFileName (name).Length > 255)
  69                                 return null;
  70
  71                         return File.Exists (name) ? name : null;
  72                 }
  73
  74                 static public DateTime GetMetaFileTime (string path)
  75                 {
  76                         path = GetMetaFileName (path);
  77                         return path != null ? File.GetLastWriteTime (path) : new DateTime ();
  78                 }
  79
  80                 static private XmlNode GetMetaFileNode (string path)
  81                 {
  82                         XmlDocument doc = GetMetaFileDoc (path);
  83
  84                         string name = Path.GetFileName (path);
  85                         if (name == null)
  86                                 return null;
  87                         string xpath = String.Format ("/directory/file[@name=\"{0}\"]", StringFu.HexEscape (name));
  88                         return doc.SelectSingleNode (xpath);
  89                 }
  90
  91                 static private XmlDocument GetMetaFileDoc (string path)
  92                 {
  93                         string metaFile = GetMetaFileName (path);
  94                         if (metaFile == null)
  95                                 return null;
  96
  97                         DateTime lastWrite = File.GetLastWriteTime (metaFile);
  98
  99
 100                         XmlDocCacheItem cached = (XmlDocCacheItem) cache [metaFile];
 101                         XmlDocument doc;
 102                         if (cached == null || lastWrite > cached.timestamp) {
 103                                 doc = new XmlDocument ();
 104                                 doc.Load (new StreamReader (metaFile));
 105
 106                                 cached = new XmlDocCacheItem ();
 107                                 cached.doc = doc;
 108                                 cached.timestamp = lastWrite;
 109                                 cache [metaFile] = cached;
 110
 111                         } else {
 112                                 doc = cached.doc;
 113                         }
 114
 115                         return doc;
 116                 }
 117
 118                 static public string GetEmblem (string path)
 119                 {
 120                         XmlNode node = GetMetaFileNode (path);
 121                         if (node == null)
 122                                 return null;
 123                         XmlNode subnode = node.SelectSingleNode ("keyword");
 124                         if (subnode == null)
 125                                 return null;
 126
 127                         XmlNode attr = subnode.Attributes.GetNamedItem ("name");
 128                         return attr != null ? attr.Value : null;
 129                 }
 130
 131                 static public string GetNotes (string path)
 132                 {
 133                         XmlNode node = GetMetaFileNode (path);
 134                         if (node == null)
 135                                 return null;
 136                         XmlNode attr = node.Attributes.GetNamedItem ("annotation");
 137                         return attr != null ? attr.Value : null;
 138                 }
 139
 140                 static public IEnumerable GetFiles (string path)
 141                 {
 142                         XmlDocument doc = GetMetaFileDoc (path);
 143
 144                         if (doc == null)
 145                                 yield break;
 146
 147                         XmlNodeList list = doc.SelectNodes ("/directory/file[@name]");
 148                         foreach (XmlNode node in list) {
 149                                 string filename = (string) node.Attributes.GetNamedItem ("name").Value;
 150                                 //filename = filename.Replace ("%20" , " ");
 151                                 yield return Path.Combine (path, filename);
 152                         }
 153
 154                         yield break;
 155                 }
 156         }
 157 }