Move Mono.CompilerServices.SymbolWriter to build after 2.1 raw mscorlib
[mono.git] / mcs / class / System.Design / System.ComponentModel.Design / DesignSurfaceServiceContainer.cs
1 //
2 // System.ComponentModel.Design.DesignSurfaceServiceContainer
3 //
4 // Authors:      
5 //        Ivan N. Zlatev (contact i-nz.net)
6 //
7 // (C) 2006 Ivan N. Zlatev
8
9 //
10 // Permission is hereby granted, free of charge, to any person obtaining
11 // a copy of this software and associated documentation files (the
12 // "Software"), to deal in the Software without restriction, including
13 // without limitation the rights to use, copy, modify, merge, publish,
14 // distribute, sublicense, and/or sell copies of the Software, and to
15 // permit persons to whom the Software is furnished to do so, subject to
16 // the following conditions:
17 // 
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
20 // 
21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 //
29
30 #if NET_2_0
31
32 using System;
33 using System.Collections;
34 using System.ComponentModel;
35
36 namespace System.ComponentModel.Design
37 {
38         
39         // Implements a ServiceContainer, which allows specific sets of services
40         // to be non-replacable for users of the IServiceContainer .
41         // 
42         internal sealed class DesignSurfaceServiceContainer : ServiceContainer
43         {
44
45                 private Hashtable _nonRemoveableServices;
46                 
47                 public DesignSurfaceServiceContainer () : this (null)
48                 {
49                 }
50
51                 public DesignSurfaceServiceContainer (IServiceProvider parentProvider) : base (parentProvider)
52                 {
53                 }
54                 
55                 internal void AddNonReplaceableService (Type serviceType, object instance)
56                 {
57                         if (_nonRemoveableServices == null)
58                                 _nonRemoveableServices = new Hashtable ();
59
60                         _nonRemoveableServices[serviceType] = serviceType;
61                         base.AddService (serviceType, instance);
62                 }
63
64                         
65                 internal void RemoveNonReplaceableService (Type serviceType, object instance)
66                 {
67                         if (_nonRemoveableServices != null) 
68                                 _nonRemoveableServices.Remove (serviceType);
69                         base.RemoveService (serviceType);
70                 }
71                 
72                 public override void RemoveService (Type serviceType, bool promote)
73                 {
74                         if (serviceType != null && _nonRemoveableServices != null && _nonRemoveableServices.ContainsKey (serviceType))
75                                 throw new InvalidOperationException ("Cannot remove non-replaceable service: " + serviceType.AssemblyQualifiedName);
76
77                         base.RemoveService (serviceType, promote);                              
78                 }
79         }
80 }
81 #endif