class/WindowsBase/System.IO.Packaging/PackUriHelper.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2007 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Chris Toshok (toshok@ximian.com)
  24 //
  25
  26 using System;
  27
  28 namespace System.IO.Packaging {
  29
  30         public static class PackUriHelper
  31         {
  32                 public static readonly string UriSchemePack = "pack";
  33                 static readonly Uri PackSchemeUri = new Uri("pack://", UriKind.Absolute);
  34
  35                 static PackUriHelper ()
  36                 {
  37                         if (!UriParser.IsKnownScheme (UriSchemePack))
  38                                 UriParser.Register (new PackUriParser (), UriSchemePack, -1);
  39                 }
  40
  41                 public static int ComparePackUri (Uri firstPackUri, Uri secondPackUri)
  42                 {
  43                         // FIXME: Do i need to do validation that it is a pack:// uri?
  44                         if (firstPackUri == null)
  45                                 return secondPackUri == null ? 0 : -1;
  46                         if (secondPackUri == null)
  47                                 return 1;
  48
  49                         // FIXME: What exactly is compared. Lets assume originalstring
  50                         return firstPackUri.OriginalString.CompareTo (secondPackUri.OriginalString);
  51                 }
  52
  53                 public static int ComparePartUri (Uri firstPartUri, Uri secondPartUri)
  54                 {
  55                         // FIXME: Do i need to do validation that it is a part URI?
  56                         if (firstPartUri == null)
  57                                 return secondPartUri == null ? 0 : -1;
  58                         if (secondPartUri == null)
  59                                 return 1;
  60
  61                         return firstPartUri.OriginalString.CompareTo (secondPartUri.OriginalString);
  62                 }
  63
  64                 public static Uri Create (Uri packageUri)
  65                 {
  66                         return Create (packageUri, null, null);
  67                 }
  68
  69                 public static Uri Create (Uri packageUri, Uri partUri)
  70                 {
  71                         return Create (packageUri, partUri, null);
  72                 }
  73
  74                 public static Uri Create (Uri packageUri, Uri partUri, string fragment)
  75                 {
  76                         Check.PackageUri (packageUri);
  77                         Check.PackageUriIsValid (packageUri);
  78
  79                         if (partUri != null)
  80                                 Check.PartUriIsValid (partUri);
  81
  82                         if (fragment != null && (fragment.Length == 0 || fragment[0] != '#'))
  83                                 throw new ArgumentException ("Fragment", "Fragment must not be empty and must start with '#'");
  84
  85                         // FIXME: Validate that partUri is a valid one? Must be relative, must start with '/'
  86
  87                         // First replace the slashes, then escape the special characters
  88                         string orig = packageUri.OriginalString.Replace ('/', ',');
  89
  90                         if (partUri != null)
  91                                 orig += partUri.OriginalString;
  92
  93 //                      if (sb[sb.Length - 1] != '/')
  94 //                              sb.Append ('/');
  95
  96                         if (fragment != null)
  97                                 orig += fragment;
  98
  99                         return new Uri ("pack://" + orig);
 100                 }
 101
 102                 public static Uri CreatePartUri (Uri partUri)
 103                 {
 104                         Check.PartUri (partUri);
 105
 106                         if (partUri.OriginalString[0] != '/')
 107                                 partUri = new Uri("/" + partUri.ToString (), UriKind.Relative);
 108                         return partUri;
 109                 }
 110
 111                 public static Uri GetNormalizedPartUri (Uri partUri)
 112                 {
 113                         Check.PartUri (partUri);
 114                         return new Uri (partUri.ToString ().ToUpperInvariant (), UriKind.Relative);
 115                 }
 116
 117                 public static Uri GetPackageUri (Uri packUri)
 118                 {
 119                         //Check.PackUri (packUri);
 120                         string s = packUri.Host.Replace (',', '/');
 121                         return new Uri (s, UriKind.Relative);
 122                 }
 123
 124                 public static Uri GetPartUri (Uri packUri)
 125                 {
 126                         throw new NotImplementedException ();
 127                 }
 128
 129                 public static Uri GetRelationshipPartUri (Uri partUri)
 130                 {
 131                         Check.PartUri (partUri);
 132                         Check.PartUriIsValid (partUri);
 133
 134                         int index = partUri.OriginalString.LastIndexOf ("/");
 135                         string s = partUri.OriginalString.Substring (0, index);
 136                         s += "/_rels" + partUri.OriginalString.Substring (index) + ".rels";
 137                         return new Uri (s, UriKind.Relative);
 138                 }
 139
 140                 public static Uri GetRelativeUri (Uri sourcePartUri, Uri targetPartUri)
 141                 {
 142                         //Check.SourcePartUri (sourcePartUri);
 143                         //Check.TargetPartUri (targetPartUri);
 144
 145                         return sourcePartUri;
 146                 }
 147
 148                 public static Uri GetSourcePartUriFromRelationshipPartUri (Uri relationshipPartUri)
 149                 {
 150                         //Check.RelationshipPartUri (relationshipPartUri);
 151                         if (!IsRelationshipPartUri (relationshipPartUri))
 152                                 throw new Exception  ("is not a relationship part!?");
 153                         return null;
 154                 }
 155
 156                 public static bool IsRelationshipPartUri (Uri partUri)
 157                 {
 158                         Check.PartUri (partUri);
 159                         return partUri.OriginalString.StartsWith ("/_rels") && partUri.OriginalString.EndsWith (".rels");
 160                 }
 161
 162                 public static Uri ResolvePartUri (Uri sourcePartUri, Uri targetUri)
 163                 {
 164                         Check.SourcePartUri (sourcePartUri);
 165                         Check.TargetUri (targetUri);
 166
 167                         Check.PartUriIsValid (sourcePartUri);
 168                         if (targetUri.IsAbsoluteUri)
 169                                 throw new ArgumentException ("targetUri", "Absolute URIs are not supported");
 170
 171                         Uri uri = new Uri ("http://fake.com");
 172                         uri = new Uri (uri, sourcePartUri);
 173                         uri = new Uri (uri, targetUri);
 174
 175                         // Trim out 'http://fake.com'
 176                         return new Uri (uri.OriginalString.Substring (15), UriKind.Relative);
 177                 }
 178         }
 179
 180 }