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