mcs/class/referencesource/System.Activities.Presentation/Microsoft.Tools.Common/Microsoft/Activities/Presentation/Xaml/XamlNamespaceHelper.cs

   1 // <copyright>
   2 //   Copyright (c) Microsoft Corporation.  All rights reserved.
   3 // </copyright>
   4
   5 namespace Microsoft.Activities.Presentation.Xaml
   6 {
   7     using System;
   8
   9     internal class XamlNamespaceHelper
  10     {
  11         internal const string ClrNamespacePrefix = "clr-namespace:";
  12         internal const string ClrNamespaceAssemblyField = ";assembly=";
  13
  14         internal static bool TryParseClrNsUri(string xamlNamespace, out string clrNamespace, out string assembly)
  15         {
  16             clrNamespace = null;
  17             assembly = null;
  18             if (!xamlNamespace.StartsWith(ClrNamespacePrefix, StringComparison.Ordinal))
  19             {
  20                 return false;
  21             }
  22             int clrNsIndex = ClrNamespacePrefix.Length;
  23             int assemblyIndex = xamlNamespace.IndexOf(ClrNamespaceAssemblyField, StringComparison.Ordinal);
  24             if (assemblyIndex < clrNsIndex)
  25             {
  26                 clrNamespace = xamlNamespace.Substring(clrNsIndex);
  27                 return true;
  28             }
  29             clrNamespace = xamlNamespace.Substring(clrNsIndex, assemblyIndex - clrNsIndex);
  30             assemblyIndex += ClrNamespaceAssemblyField.Length;
  31             assembly = xamlNamespace.Substring(assemblyIndex);
  32             return true;
  33         }
  34     }
  35 }