2 // System.ComponentModel.Design.DesignSurfaceServiceContainer
5 // Ivan N. Zlatev (contact i-nz.net)
7 // (C) 2006 Ivan N. Zlatev
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:
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
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.
33 using System.Collections;
34 using System.ComponentModel;
36 namespace System.ComponentModel.Design
39 // Implements a ServiceContainer, which allows specific sets of services
40 // to be non-replacable for users of the IServiceContainer .
42 internal sealed class DesignSurfaceServiceContainer : ServiceContainer
45 private Hashtable _nonRemoveableServices;
47 public DesignSurfaceServiceContainer () : this (null)
51 public DesignSurfaceServiceContainer (IServiceProvider parentProvider) : base (parentProvider)
55 internal void AddNonReplaceableService (Type serviceType, object instance)
57 if (_nonRemoveableServices == null)
58 _nonRemoveableServices = new Hashtable ();
60 _nonRemoveableServices[serviceType] = serviceType;
61 base.AddService (serviceType, instance);
65 internal void RemoveNonReplaceableService (Type serviceType, object instance)
67 if (_nonRemoveableServices != null)
68 _nonRemoveableServices.Remove (serviceType);
69 base.RemoveService (serviceType);
72 public override void RemoveService (Type serviceType, bool promote)
74 if (serviceType != null && _nonRemoveableServices != null && _nonRemoveableServices.ContainsKey (serviceType))
75 throw new InvalidOperationException ("Cannot remove non-replaceable service: " + serviceType.AssemblyQualifiedName);
77 base.RemoveService (serviceType, promote);