class/System.Web/System.Web.Compilation/AppResourceFilesCollection.cs

   1 //
   2 // System.Web.Compilation.AppResourceFilesCollection
   3 //
   4 // Authors:
   5 //   Marek Habersack (grendello@gmail.com)
   6 //
   7 // (C) 2006 Marek Habersack
   8 //
   9
  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
  31 using System;
  32 using System.Collections.Generic;
  33 using System.Globalization;
  34 using System.IO;
  35 using System.Web.Util;
  36
  37 namespace System.Web.Compilation
  38 {
  39         internal enum AppResourceFileKind
  40         {
  41                 NotResource,
  42                 ResX,
  43                 Resource,
  44                 Binary
  45         };
  46
  47         internal class AppResourcesLengthComparer<T>: IComparer<T>
  48         {
  49                 int CompareStrings (string a, string b)
  50                 {
  51                         if (a == null || b == null)
  52                                 return 0;
  53                         return (int)b.Length - (int)a.Length;
  54                 }
  55
  56                 int IComparer<T>.Compare (T _a, T _b)
  57                 {
  58                         string a = null, b = null;
  59                         if (_a is string && _b is string) {
  60                                 a = _a as string;
  61                                 b = _b as string;
  62                         } else if (_a is List<string> && _b is List<string>) {
  63                                 List<string> tmp = _a as List<string>;
  64                                 a = tmp [0];
  65                                 tmp = _b as List<string>;
  66                                 b = tmp [0];
  67                         } else if (_a is AppResourceFileInfo && _b is AppResourceFileInfo) {
  68                                 AppResourceFileInfo tmp = _a as AppResourceFileInfo;
  69                                 a = tmp.Info.Name;
  70                                 tmp = _b as AppResourceFileInfo;
  71                                 b = tmp.Info.Name;
  72                         } else
  73                                 return 0;
  74                         return CompareStrings (a, b);
  75                 }
  76         }
  77
  78         internal class AppResourceFilesCollection
  79         {
  80                 List <AppResourceFileInfo> files;
  81                 bool isGlobal;
  82                 string sourceDir;
  83
  84                 public string SourceDir {
  85                         get { return sourceDir; }
  86                 }
  87
  88                 public bool HasFiles {
  89                         get {
  90                                 if (String.IsNullOrEmpty (sourceDir))
  91                                         return false;
  92                                 return files.Count > 0;
  93                         }
  94                 }
  95
  96                 public List <AppResourceFileInfo> Files {
  97                         get { return files; }
  98                 }
  99
 100                 public AppResourceFilesCollection (HttpContext context)
 101                 {
 102                         if (context == null)
 103                                 throw new ArgumentNullException ("context");
 104
 105                         this.isGlobal = true;
 106                         this.files = new List <AppResourceFileInfo> ();
 107
 108                         string resourcePath;
 109                         resourcePath = Path.Combine (HttpRuntime.AppDomainAppPath, "App_GlobalResources");
 110                         if (Directory.Exists (resourcePath))
 111                                 sourceDir = resourcePath;
 112                 }
 113
 114                 public AppResourceFilesCollection (string parserDir)
 115                 {
 116                         if (String.IsNullOrEmpty (parserDir))
 117                                 throw new ArgumentException ("parserDir cannot be empty");
 118                         this.isGlobal = true;
 119                         this.files = new List <AppResourceFileInfo> ();
 120
 121                         string resourcePath;
 122                         resourcePath = Path.Combine (parserDir, "App_LocalResources");
 123                         if (Directory.Exists (resourcePath)) {
 124                                 sourceDir = resourcePath;
 125                                 HttpApplicationFactory.WatchLocationForRestart (sourceDir, "*");
 126                         }
 127                 }
 128
 129                 public void Collect ()
 130                 {
 131                         if (String.IsNullOrEmpty (sourceDir))
 132                             return;
 133                         DirectoryInfo di = new DirectoryInfo (sourceDir);
 134                         FileInfo[] infos = di.GetFiles ();
 135                         if (infos.Length == 0)
 136                                 return;
 137
 138                         string extension;
 139                         AppResourceFileInfo arfi;
 140                         AppResourceFileKind kind;
 141
 142                         foreach (FileInfo fi in infos) {
 143                                 extension = fi.Extension;
 144                                 if (Acceptable (extension, out kind))
 145                                         arfi = new AppResourceFileInfo (fi, kind);
 146                                 else
 147                                         continue;
 148
 149                                 files.Add (arfi);
 150                         }
 151
 152                         if (isGlobal && files.Count == 0)
 153                                 return;
 154                         AppResourcesLengthComparer<AppResourceFileInfo> lcFiles = new AppResourcesLengthComparer<AppResourceFileInfo> ();
 155                         files.Sort (lcFiles);
 156                 }
 157
 158                 bool Acceptable (string extension, out AppResourceFileKind kind)
 159                 {
 160                         switch (extension.ToLower (Helpers.InvariantCulture))
 161                         {
 162                                 default:
 163                                         kind = AppResourceFileKind.NotResource;
 164                                         return false;
 165
 166                                 case ".resx":
 167                                         kind = AppResourceFileKind.ResX;
 168                                         return true;
 169
 170                                 case ".resource":
 171                                         kind = AppResourceFileKind.Resource;
 172                                         return true;
 173                         }
 174                 }
 175         };
 176 };
 177