MethodDefinition InjectInterceptedMethod(TypeDefinition targetType, MethodDefinition innerOnPropertyChanging)
{
var delegateHolderInjector = new DelegateHolderInjector
{
TargetTypeDefinition=targetType,
OnPropertyChangingMethodReference = innerOnPropertyChanging,
ModuleWeaver = this
};
delegateHolderInjector.InjectDelegateHolder();
var method = new MethodDefinition(EventInvokerNames.First(), GetMethodAttributes(targetType), ModuleDefinition.TypeSystem.Void);
var propertyName = new ParameterDefinition("propertyName", ParameterAttributes.None, ModuleDefinition.TypeSystem.String);
method.Parameters.Add(propertyName);
if (InterceptorType == InvokerTypes.Before)
{
var before = new ParameterDefinition("before", ParameterAttributes.None, ModuleDefinition.TypeSystem.Object);
method.Parameters.Add(before);
}
var action = new VariableDefinition("firePropertyChanging", ActionTypeReference);
method.Body.Variables.Add(action);
var variableDefinition = new VariableDefinition("delegateHolder", delegateHolderInjector.TypeDefinition);
method.Body.Variables.Add(variableDefinition);
var instructions = method.Body.Instructions;
var last = Instruction.Create(OpCodes.Ret);
instructions.Add(Instruction.Create(OpCodes.Newobj, delegateHolderInjector.ConstructorDefinition));
instructions.Add(Instruction.Create(OpCodes.Stloc_1));
instructions.Add(Instruction.Create(OpCodes.Ldloc_1));
instructions.Add(Instruction.Create(OpCodes.Ldarg_1));
instructions.Add(Instruction.Create(OpCodes.Stfld, delegateHolderInjector.PropertyName));
instructions.Add(Instruction.Create(OpCodes.Ldloc_1));
instructions.Add(Instruction.Create(OpCodes.Ldarg_0));
instructions.Add(Instruction.Create(OpCodes.Stfld, delegateHolderInjector.Target));
instructions.Add(Instruction.Create(OpCodes.Ldloc_1));
instructions.Add(Instruction.Create(OpCodes.Ldftn, delegateHolderInjector.MethodDefinition));
instructions.Add(Instruction.Create(OpCodes.Newobj, ActionConstructorReference));
instructions.Add(Instruction.Create(OpCodes.Stloc_0));
instructions.Add(Instruction.Create(OpCodes.Ldarg_0));
instructions.Add(Instruction.Create(OpCodes.Ldloc_0));
instructions.Add(Instruction.Create(OpCodes.Ldloc_1));
instructions.Add(Instruction.Create(OpCodes.Ldfld, delegateHolderInjector.PropertyName));
if (InterceptorType == InvokerTypes.Before)
{
instructions.Add(Instruction.Create(OpCodes.Ldarg_2));
instructions.Add(Instruction.Create(OpCodes.Call, InterceptMethod));
}
else
{
instructions.Add(Instruction.Create(OpCodes.Call, InterceptMethod));
}
instructions.Add(last);
method.Body.InitLocals = true;
targetType.Methods.Add(method);
return method;
}
MethodDefinition InjectInterceptedMethod(TypeDefinition targetType, MethodDefinition innerOnPropertyChanging)
{
var delegateHolderInjector = new DelegateHolderInjector
{
TargetTypeDefinition = targetType,
OnPropertyChangingMethodReference = innerOnPropertyChanging,
ModuleWeaver = this
};
delegateHolderInjector.InjectDelegateHolder();
var method = new MethodDefinition(EventInvokerNames.First(), GetMethodAttributes(targetType), ModuleDefinition.TypeSystem.Void);
var propertyName = new ParameterDefinition("propertyName", ParameterAttributes.None, ModuleDefinition.TypeSystem.String);
method.Parameters.Add(propertyName);
if (InterceptorType == InvokerTypes.Before)
{
var before = new ParameterDefinition("before", ParameterAttributes.None, ModuleDefinition.TypeSystem.Object);
method.Parameters.Add(before);
}
var action = new VariableDefinition("firePropertyChanging", ActionTypeReference);
method.Body.Variables.Add(action);
var variableDefinition = new VariableDefinition("delegateHolder", delegateHolderInjector.TypeDefinition);
method.Body.Variables.Add(variableDefinition);
var instructions = method.Body.Instructions;
var last = Instruction.Create(OpCodes.Ret);
instructions.Add(Instruction.Create(OpCodes.Newobj, delegateHolderInjector.ConstructorDefinition));
instructions.Add(Instruction.Create(OpCodes.Stloc_1));
instructions.Add(Instruction.Create(OpCodes.Ldloc_1));
instructions.Add(Instruction.Create(OpCodes.Ldarg_1));
instructions.Add(Instruction.Create(OpCodes.Stfld, delegateHolderInjector.PropertyName));
instructions.Add(Instruction.Create(OpCodes.Ldloc_1));
instructions.Add(Instruction.Create(OpCodes.Ldarg_0));
instructions.Add(Instruction.Create(OpCodes.Stfld, delegateHolderInjector.Target));
instructions.Add(Instruction.Create(OpCodes.Ldloc_1));
instructions.Add(Instruction.Create(OpCodes.Ldftn, delegateHolderInjector.MethodDefinition));
instructions.Add(Instruction.Create(OpCodes.Newobj, ActionConstructorReference));
instructions.Add(Instruction.Create(OpCodes.Stloc_0));
instructions.Add(Instruction.Create(OpCodes.Ldarg_0));
instructions.Add(Instruction.Create(OpCodes.Ldloc_0));
instructions.Add(Instruction.Create(OpCodes.Ldloc_1));
instructions.Add(Instruction.Create(OpCodes.Ldfld, delegateHolderInjector.PropertyName));
if (InterceptorType == InvokerTypes.Before)
{
instructions.Add(Instruction.Create(OpCodes.Ldarg_2));
instructions.Add(Instruction.Create(OpCodes.Call, InterceptMethod));
}
else
{
instructions.Add(Instruction.Create(OpCodes.Call, InterceptMethod));
}
instructions.Add(last);
method.Body.InitLocals = true;
targetType.Methods.Add(method);
return(method);
}