80 lines
2.6 KiB
C#
80 lines
2.6 KiB
C#
//
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// System.ComponentModel.Design.DesignSurfaceServiceContainer
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//
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// Authors:
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// Ivan N. Zlatev (contact i-nz.net)
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//
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// (C) 2006 Ivan N. Zlatev
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections;
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using System.ComponentModel;
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namespace System.ComponentModel.Design
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{
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// Implements a ServiceContainer, which allows specific sets of services
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// to be non-replacable for users of the IServiceContainer .
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//
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internal sealed class DesignSurfaceServiceContainer : ServiceContainer
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{
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private Hashtable _nonRemoveableServices;
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public DesignSurfaceServiceContainer () : this (null)
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{
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}
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public DesignSurfaceServiceContainer (IServiceProvider parentProvider) : base (parentProvider)
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{
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}
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internal void AddNonReplaceableService (Type serviceType, object instance)
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{
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if (_nonRemoveableServices == null)
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_nonRemoveableServices = new Hashtable ();
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_nonRemoveableServices[serviceType] = serviceType;
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base.AddService (serviceType, instance);
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}
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internal void RemoveNonReplaceableService (Type serviceType, object instance)
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{
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if (_nonRemoveableServices != null)
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_nonRemoveableServices.Remove (serviceType);
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base.RemoveService (serviceType);
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}
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public override void RemoveService (Type serviceType, bool promote)
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{
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if (serviceType != null && _nonRemoveableServices != null && _nonRemoveableServices.ContainsKey (serviceType))
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throw new InvalidOperationException ("Cannot remove non-replaceable service: " + serviceType.AssemblyQualifiedName);
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base.RemoveService (serviceType, promote);
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}
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}
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}
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