mcs/class/corlib/System.IO.IsolatedStorage/MoonIsolatedStorageFile.cs

   1 //
   2 // System.IO.IsolatedStorage.MoonIsolatedStorageFile
   3 //
   4 // Moonlight's implementation for the IsolatedStorageFile
   5 //
   6 // Authors
   7 //      Miguel de Icaza (miguel@novell.com)
   8 //
   9 // Copyright (C) 2007, 2008 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30 #if NET_2_1
  31 using System;
  32 using System.IO;
  33 using System.Security;
  34
  35 namespace System.IO.IsolatedStorage {
  36
  37         public sealed class IsolatedStorageFile : IDisposable {
  38                 static string appdir;
  39
  40                 static string TryDirectory (string path)
  41                 {
  42                         try {
  43                                 Directory.CreateDirectory (path);
  44                                 return path;
  45                         } catch {
  46                                 return null;
  47                         }
  48                 }
  49
  50                 static IsolatedStorageFile ()
  51                 {
  52                         string xdg_data_home = Environment.GetEnvironmentVariable ("XDG_DATA_HOME");
  53                         if (String.IsNullOrEmpty (xdg_data_home)) {
  54                                 xdg_data_home = Environment.GetFolderPath (Environment.SpecialFolder.LocalApplicationData);
  55                         }
  56
  57                         string basedir;
  58                         basedir = TryDirectory (Path.Combine (xdg_data_home, "moonlight"));
  59                         if (basedir == null){
  60                                 //
  61                                 // Maybe try a few others?
  62                                 //
  63                                 return;
  64                         }
  65
  66                         // FIXME: Use the actual url from the plugin for this.
  67                         appdir = Path.Combine (basedir, "url");
  68                         try {
  69                                 Directory.CreateDirectory (appdir);
  70                         } catch {
  71                                 appdir = null;
  72                         }
  73                 }
  74
  75
  76                 private bool removed = false;
  77                 private bool disposed = false;
  78
  79                 internal IsolatedStorageFile (string basedir)
  80                 {
  81                 }
  82
  83                 internal void PreCheck ()
  84                 {
  85                         if (disposed)
  86                                 throw new ObjectDisposedException ("Storage was disposed");
  87                         if (removed)
  88                                 throw new IsolatedStorageException ("Storage was removed");
  89                 }
  90
  91                 public static IsolatedStorageFile GetUserStoreForApplication ()
  92                 {
  93                         if (appdir == null)
  94                                 throw new SecurityException ();
  95
  96                         return new IsolatedStorageFile (appdir);
  97                 }
  98
  99                 public static IsolatedStorageFile GetUserStoreForSite ()
 100                 {
 101                         if (appdir == null)
 102                                 throw new SecurityException ();
 103
 104                         return new IsolatedStorageFile (appdir);
 105                 }
 106
 107                 internal static string Verify (string path)
 108                 {
 109                         try {
 110                                 string full = Path.GetFullPath (Path.Combine (appdir, path));
 111                                 if (full.StartsWith (appdir + Path.DirectorySeparatorChar))
 112                                         return full;
 113                         } catch {
 114                                 throw new IsolatedStorageException ();
 115                         }
 116                         throw new IsolatedStorageException ();
 117                 }
 118
 119                 public void CreateDirectory (string dir)
 120                 {
 121                         Verify (dir);
 122                         Directory.CreateDirectory (dir);
 123                 }
 124
 125                 public IsolatedStorageFileStream CreateFile (string path)
 126                 {
 127                         PreCheck ();
 128                         if (path == null)
 129                                 throw new ArgumentNullException ("path");
 130
 131                         return new IsolatedStorageFileStream (path, FileMode.Create, this);
 132                 }
 133
 134                 public void DeleteDirectory (string dir)
 135                 {
 136                         PreCheck ();
 137                         Verify (dir);
 138                         Directory.Delete (dir);
 139                 }
 140
 141                 public bool DirectoryExists (string path)
 142                 {
 143                         PreCheck ();
 144                         Verify (path);
 145                         return Directory.Exists (path);
 146                 }
 147
 148                 public bool FileExists (string path)
 149                 {
 150                         PreCheck ();
 151                         Verify (path);
 152                         return File.Exists (path);
 153                 }
 154
 155                 public string [] GetDirectoryNames ()
 156                 {
 157                         return Directory.GetFiles (appdir);
 158                 }
 159
 160                 public string [] GetDirectoryNames (string searchPattern)
 161                 {
 162                         if (searchPattern.IndexOf ('/') != -1)
 163                                 throw new IsolatedStorageException ();
 164
 165                         return Directory.GetDirectories (appdir, searchPattern);
 166                 }
 167
 168                 public string [] GetFileNames ()
 169                 {
 170                         return Directory.GetFiles (appdir);
 171                 }
 172
 173                 public string [] GetFileNames (string searchPattern)
 174                 {
 175                         if (searchPattern.IndexOf ('/') != -1)
 176                                 throw new IsolatedStorageException ();
 177
 178                         return Directory.GetFiles (appdir, searchPattern);
 179                 }
 180
 181                 public void DeleteFile (string file)
 182                 {
 183                         Verify (file);
 184                         File.Delete (file);
 185                 }
 186
 187                 public void Dispose ()
 188                 {
 189                         disposed = true;
 190                 }
 191
 192                 public IsolatedStorageFileStream OpenFile (string path, FileMode mode)
 193                 {
 194                         return OpenFile (path, mode, FileAccess.ReadWrite, FileShare.None);
 195                 }
 196
 197                 public IsolatedStorageFileStream OpenFile (string path, FileMode mode, FileAccess access)
 198                 {
 199                         return OpenFile (path, mode, access, FileShare.None);
 200                 }
 201
 202                 public IsolatedStorageFileStream OpenFile (string path, FileMode mode, FileAccess access, FileShare share)
 203                 {
 204                         PreCheck ();
 205                         if (path == null)
 206                                 throw new ArgumentNullException ("path");
 207
 208                         return new IsolatedStorageFileStream (path, mode, access, share, this);
 209                 }
 210
 211                 public void Remove ()
 212                 {
 213                         PreCheck ();
 214                         try {
 215                                 // TODO - try to clean out everything
 216                         }
 217                         finally {
 218                                 removed = true;
 219                         }
 220                 }
 221
 222                 public long AvailableFreeSpace {
 223                         get {
 224                                 PreCheck ();
 225                                 return 1024*1024;
 226                         }
 227                 }
 228
 229                 public long Quota {
 230                         get {
 231                                 PreCheck ();
 232                                 return 1024*1024;
 233                         }
 234                 }
 235
 236                 public bool IncreaseQuotaTo (long newQuotaSize)
 237                 {
 238                         PreCheck ();
 239                         if (newQuotaSize <= Quota)
 240                                 throw new ArgumentException ("newQuotaSize", "Only increase is possible");
 241
 242                         return true;
 243                 }
 244         }
 245 }
 246 #endif