public static void Execute(PropertyDefinition property_definition, MethodDefinition notify_method, DependencyMap map)
{
FieldDefinition backing_field = property_definition.GetAutoPropertyBackingField();
// Clear custom attributes
backing_field.CustomAttributes.Clear();
property_definition.GetMethod.CustomAttributes.Clear();
property_definition.SetMethod.CustomAttributes.Clear();
// Clear set method body
property_definition.SetMethod.Body.Instructions.Clear();
ILProcessor processor = property_definition.SetMethod.Body.GetILProcessor();
Instruction ret = processor.Create(OpCodes.Ret);
// if (value != property)
processor.Emit(OpCodes.Ldarg_1);
processor.Emit(OpCodes.Ldarg_0);
processor.Emit(OpCodes.Ldfld, backing_field);
processor.Emit(OpCodes.Ceq);
processor.Emit(OpCodes.Brtrue_S, ret);
// property = value
processor.Emit(OpCodes.Ldarg_0);
processor.Emit(OpCodes.Ldarg_1);
processor.Emit(OpCodes.Stfld, backing_field);
// NotifyPropertyChanged(property)
processor.Emit(OpCodes.Ldarg_0);
processor.Emit(OpCodes.Ldstr, property_definition.Name);
processor.Emit(OpCodes.Call, notify_method);
// Add notifications for dependent properties
foreach (var target in map.GetDependenciesFor(property_definition.Name))
{
log.Trace("\t\t\t\t\tAdding dependency " + target);
processor.Emit(OpCodes.Ldarg_0);
processor.Emit(OpCodes.Ldstr, target);
processor.Emit(OpCodes.Call, notify_method);
}
processor.Append(ret);
}
public static void Execute(PropertyDefinition property_definition, MethodDefinition notify_method, MethodDefinition collection_notification_method)
{
log.Trace(string.Format("\t\t\t\t\tRewriting {0} to raise collection notification method", property_definition.Name));
// Find backing field
FieldDefinition backing_field = property_definition.GetAutoPropertyBackingField();
// Import CollectionChanged methods
Type backing_field_type = backing_field.GetAssemblyQualifiedName();
MethodReference collection_remove_handler = property_definition.Module.Import(backing_field_type.GetMethod("remove_CollectionChanged"));
MethodReference collection_add_handler = property_definition.Module.Import(backing_field_type.GetMethod("add_CollectionChanged"));
MethodReference event_constructor = property_definition.Module.Import(typeof(NotifyCollectionChangedEventHandler).GetConstructors()[0]);
// Clear custom attributes
backing_field.CustomAttributes.Clear();
property_definition.GetMethod.CustomAttributes.Clear();
property_definition.SetMethod.CustomAttributes.Clear();
// Clear set method body
property_definition.SetMethod.Body.Instructions.Clear();
ILProcessor processor = property_definition.SetMethod.Body.GetILProcessor();
Instruction ret = processor.Create(OpCodes.Ret);
Instruction set_value_nop = processor.Create(OpCodes.Nop);
Instruction notify_property_nop = processor.Create(OpCodes.Nop);
// if (value != property)
processor.Append(processor.Create(OpCodes.Ldarg_1));
processor.Append(processor.Create(OpCodes.Ldarg_0));
processor.Append(processor.Create(OpCodes.Ldfld, backing_field));
processor.Append(processor.Create(OpCodes.Ceq));
processor.Append(processor.Create(OpCodes.Brtrue_S, ret));
// If (property != null)
processor.Append(processor.Create(OpCodes.Ldarg_0));
processor.Append(processor.Create(OpCodes.Ldfld, backing_field));
processor.Append(processor.Create(OpCodes.Ldnull));
processor.Append(processor.Create(OpCodes.Ceq));
processor.Append(processor.Create(OpCodes.Brtrue_S, set_value_nop));
// CollectionChanged -= notify method
processor.Append(processor.Create(OpCodes.Ldarg_0));
processor.Append(processor.Create(OpCodes.Ldfld, backing_field));
processor.Append(processor.Create(OpCodes.Ldarg_0));
processor.Append(processor.Create(OpCodes.Ldftn, collection_notification_method));
processor.Append(processor.Create(OpCodes.Newobj, event_constructor));
processor.Append(processor.Create(OpCodes.Callvirt, collection_remove_handler));
// property = value
processor.Append(set_value_nop);
processor.Append(processor.Create(OpCodes.Ldarg_0));
processor.Append(processor.Create(OpCodes.Ldarg_1));
processor.Append(processor.Create(OpCodes.Stfld, backing_field));
// If (property != null)
processor.Append(processor.Create(OpCodes.Ldarg_0));
processor.Append(processor.Create(OpCodes.Ldfld, backing_field));
processor.Append(processor.Create(OpCodes.Ldnull));
processor.Append(processor.Create(OpCodes.Ceq));
processor.Append(processor.Create(OpCodes.Brtrue_S, notify_property_nop));
// CollectionChanged -= notify method
processor.Append(processor.Create(OpCodes.Ldarg_0));
processor.Append(processor.Create(OpCodes.Ldfld, backing_field));
processor.Append(processor.Create(OpCodes.Ldarg_0));
processor.Append(processor.Create(OpCodes.Ldftn, collection_notification_method));
processor.Append(processor.Create(OpCodes.Newobj, event_constructor));
processor.Append(processor.Create(OpCodes.Callvirt, collection_add_handler));
// NotifyPropertyChanged(property)
processor.Append(notify_property_nop);
processor.Append(processor.Create(OpCodes.Ldarg_0));
processor.Append(processor.Create(OpCodes.Ldstr, property_definition.Name));
processor.Append(processor.Create(OpCodes.Call, notify_method));
processor.Append(ret);
}
