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

   1 // PackUriParser.cs created with MonoDevelop
   2 // User: alan at 14:50 31/10/2008
   3 //
   4 // To change standard headers go to Edit->Preferences->Coding->Standard Headers
   5 //
   6
   7 using System;
   8 using System.Collections.Generic;
   9 using System.Text;
  10
  11 namespace System.IO.Packaging
  12 {
  13     class PackUriParser : System.GenericUriParser
  14     {
  15         const string SchemaName = "pack";
  16
  17         StringBuilder builder = new StringBuilder();
  18
  19         public PackUriParser ()
  20             : base (GenericUriParserOptions.Default)
  21         {
  22         }
  23
  24         protected override string GetComponents(Uri uri, UriComponents components, UriFormat format)
  25         {
  26             string s = uri.OriginalString;
  27             builder.Remove(0, builder.Length);
  28
  29             if ((components & UriComponents.Scheme) == UriComponents.Scheme)
  30             {
  31                 int start = 0;
  32                 int end = s.IndexOf(':');
  33                 builder.Append(s, start, end - start);
  34             }
  35
  36             if ((components & UriComponents.Host) == UriComponents.Host)
  37             {
  38                 // Skip past pack://
  39                 int start = 7;
  40                 int end = s.IndexOf('/', start);
  41                 if (end == -1)
  42                     end = s.Length;
  43
  44                 if (builder.Length > 0)
  45                     builder.Append("://");
  46
  47                 builder.Append(s, start, end - start);
  48             }
  49
  50             // Port is always -1, so i think i can ignore both Port and StrongPort
  51             // Normally they'd get parsed here
  52
  53             if ((components & UriComponents.Path) == UriComponents.Path)
  54             {
  55                 // Skip past pack://
  56                 int start = s.IndexOf('/', 7);
  57                 int end = s.IndexOf('?');
  58                 if (end == -1)
  59                     end = s.IndexOf('#');
  60                 if (end == -1)
  61                     end = s.Length;
  62
  63                 if ((components & UriComponents.KeepDelimiter) != UriComponents.KeepDelimiter &&
  64                     builder.Length == 0)
  65                     start++;
  66
  67                 builder.Append(s, start, end - start);
  68             }
  69
  70             if ((components & UriComponents.Query) == UriComponents.Query)
  71             {
  72                 int index = s.IndexOf('?');
  73                 if (index == -1)
  74                     return null;
  75
  76                 if ((components & UriComponents.KeepDelimiter) != UriComponents.KeepDelimiter &&
  77                     builder.Length == 0)
  78                     index++;
  79
  80                 int fragIndex = s.IndexOf('#');
  81                 int end = fragIndex == -1 ? s.Length : fragIndex;
  82                 builder.Append(s, index, end - index);
  83             }
  84
  85             if ((components & UriComponents.Fragment) == UriComponents.Fragment)
  86             {
  87                 int index = s.IndexOf('#');
  88                 if (index == -1)
  89                     return null;
  90
  91                 if ((components & UriComponents.KeepDelimiter) != UriComponents.KeepDelimiter &&
  92                     builder.Length == 0)
  93                     index++;
  94
  95                 builder.Append(s, index, s.Length - index);
  96             }
  97
  98             return builder.ToString();
  99         }
 100
 101         protected override void InitializeAndValidate(Uri uri, out UriFormatException parsingError)
 102         {
 103             parsingError = null;
 104         }
 105
 106         protected override UriParser OnNewUri()
 107         {
 108             return new PackUriParser();
 109         }
 110     }
 111 }