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