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comparison Extensions/JointureAddOn/Mapping/NotifyPropertyChangedInterceptor.cs @ 0:f990fcb411a9

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Копия текущей версии из github
author cin
date Thu, 27 Mar 2014 21:46:09 +0400
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-1:000000000000 0:f990fcb411a9
1 #region
2
3 using System.ComponentModel;
4 using Castle.DynamicProxy;
5
6 #endregion
7
8 namespace BLToolkit.Mapping
9 {
10 public class NotifyPropertyChangedInterceptor : IInterceptor
11 {
12 private readonly string _typeName;
13 private PropertyChangedEventHandler _subscribers = delegate { };
14
15 public NotifyPropertyChangedInterceptor(string typeName)
16 {
17 _typeName = typeName;
18 }
19
20 public void Intercept(IInvocation invocation)
21 {
22 if (invocation.Method.DeclaringType == typeof (TypeFactory.DataBindingFactory.IMarkerInterface))
23 {
24 invocation.ReturnValue = _typeName;
25 return;
26 }
27 if (invocation.Method.DeclaringType == typeof (INotifyPropertyChanged))
28 {
29 var propertyChangedEventHandler = (PropertyChangedEventHandler) invocation.Arguments[0];
30 if (invocation.Method.Name.StartsWith("add_"))
31 {
32 _subscribers += propertyChangedEventHandler;
33 }
34 else
35 {
36 _subscribers -= propertyChangedEventHandler;
37 }
38 return;
39 }
40 invocation.Proceed();
41 if (invocation.Method.Name.StartsWith("set_"))
42 {
43 var propertyName = invocation.Method.Name.Substring(4);
44 _subscribers(invocation.InvocationTarget, new PropertyChangedEventArgs(propertyName));
45 }
46 }
47 }
48 }