Remove ChangeLog files from the repo
[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
31 using System;
32 using System.Collections;
33 using System.ComponentModel;
34
35 namespace System.ComponentModel.Design
36 {
37         
38         // Implements a ServiceContainer, which allows specific sets of services
39         // to be non-replacable for users of the IServiceContainer .
40         // 
41         internal sealed class DesignSurfaceServiceContainer : ServiceContainer
42         {
43
44                 private Hashtable _nonRemoveableServices;
45                 
46                 public DesignSurfaceServiceContainer () : this (null)
47                 {
48                 }
49
50                 public DesignSurfaceServiceContainer (IServiceProvider parentProvider) : base (parentProvider)
51                 {
52                 }
53                 
54                 internal void AddNonReplaceableService (Type serviceType, object instance)
55                 {
56                         if (_nonRemoveableServices == null)
57                                 _nonRemoveableServices = new Hashtable ();
58
59                         _nonRemoveableServices[serviceType] = serviceType;
60                         base.AddService (serviceType, instance);
61                 }
62
63                         
64                 internal void RemoveNonReplaceableService (Type serviceType, object instance)
65                 {
66                         if (_nonRemoveableServices != null) 
67                                 _nonRemoveableServices.Remove (serviceType);
68                         base.RemoveService (serviceType);
69                 }
70                 
71                 public override void RemoveService (Type serviceType, bool promote)
72                 {
73                         if (serviceType != null && _nonRemoveableServices != null && _nonRemoveableServices.ContainsKey (serviceType))
74                                 throw new InvalidOperationException ("Cannot remove non-replaceable service: " + serviceType.AssemblyQualifiedName);
75
76                         base.RemoveService (serviceType, promote);                              
77                 }
78         }
79 }