public virtual void PopIfReturnValue(MethodInstance method)
{
if (mv != null)
{
mv.PopIfReturnValue(method);
}
}
protected PropertyInstance ImplementNotifyPropertyChangedSource(PropertyInstance p_propertyChangeTemplate,
FieldInstance f_propertyChangeSupport)
{
MethodInstance m_onPropertyChanged_Values = MethodInstance.FindByTemplate(template_m_onPropertyChanged_Values, true);
if (m_onPropertyChanged_Values == null)
{
IMethodVisitor mv = VisitMethod(template_m_onPropertyChanged_Values);
mv.CallThisGetter(p_propertyChangeTemplate);
mv.LoadThis();
mv.GetThisField(f_propertyChangeSupport);
// getMethodHandle(sender, propertyName)
mv.CallThisGetter(p_propertyChangeTemplate);
mv.LoadThis();
mv.LoadArg(0);
mv.InvokeVirtual(m_getMethodHandle);
mv.LoadArg(1);
mv.LoadArg(2);
// firePropertyChange(sender, propertyChangeSupport, property, oldValue, newValue)
mv.InvokeVirtual(m_firePropertyChange);
mv.PopIfReturnValue(m_firePropertyChange);
mv.ReturnVoidOrThis();
mv.EndMethod();
m_onPropertyChanged_Values = mv.Method;
}
MethodInstance m_onPropertyChanged = MethodInstance.FindByTemplate(template_m_onPropertyChanged, true);
if (m_onPropertyChanged == null)
{
IMethodVisitor mv = VisitMethod(template_m_onPropertyChanged);
mv.LoadThis();
mv.LoadArg(0);
mv.PushNull();
mv.PushNull();
mv.InvokeVirtual(m_onPropertyChanged_Values);
mv.PopIfReturnValue(m_onPropertyChanged_Values);
mv.ReturnVoidOrThis();
mv.EndMethod();
m_onPropertyChanged = mv.Method;
}
PropertyInstance p_pceHandlers = PropertyInstance.FindByTemplate(p_propertyChangeSupport, true);
if (p_pceHandlers == null)
{
HideFromDebug(ImplementGetter(p_propertyChangeSupport.Getter, f_propertyChangeSupport));
p_pceHandlers = PropertyInstance.FindByTemplate(p_propertyChangeSupport, false);
}
if (EmbeddedEnhancementHint.HasMemberPath(State.Context))
{
PropertyInstance p_parentEntity = EmbeddedTypeVisitor.GetParentObjectProperty(this);
if (MethodInstance.FindByTemplate(p_parentChildEventHandler.Getter, true) == null)
{
IMethodVisitor mv = VisitMethod(p_parentChildEventHandler.Getter);
mv.CallThisGetter(p_parentEntity);
mv.InvokeInterface(p_parentChildEventHandler.Getter);
mv.ReturnValue();
mv.EndMethod();
HideFromDebug(mv.Method);
}
if (MethodInstance.FindByTemplate(p_collectionEventHandler.Getter, true) == null)
{
IMethodVisitor mv = VisitMethod(p_collectionEventHandler.Getter);
mv.CallThisGetter(p_parentEntity);
mv.InvokeInterface(p_collectionEventHandler.Getter);
mv.ReturnValue();
mv.EndMethod();
HideFromDebug(mv.Method);
}
}
else
{
if (MethodInstance.FindByTemplate(p_parentChildEventHandler.Getter, true) == null)
{
HideFromDebug(ImplementLazyInitProperty(p_parentChildEventHandler, delegate(IMethodVisitor mv)
{
MethodInstance method = new MethodInstance(null, typeof(NotifyPropertyChangedClassVisitor), typeof(PropertyChangedEventHandler), "CreateParentChildEventHandler", typeof(Object));
mv.LoadThis();
mv.InvokeStatic(method);
}));
}
if (MethodInstance.FindByTemplate(p_collectionEventHandler.Getter, true) == null)
{
HideFromDebug(ImplementLazyInitProperty(p_collectionEventHandler, delegate(IMethodVisitor mv)
{
MethodInstance method = new MethodInstance(null, typeof(NotifyPropertyChangedClassVisitor), typeof(NotifyCollectionChangedEventHandler), "CreateCollectionEventHandler", typeof(Object));
mv.LoadThis();
mv.InvokeStatic(method);
}));
}
}
//MethodAttributes ma = MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig;
//{
// ConstructorInfo pceaCI = typeof(PropertyChangedEventArgs).GetConstructor(new Type[] { typeof(String) });
// MethodBuilder mb = VisitorUtil.DefineMethod(vs, onPropertyChangedMI_string, ma);
// ILGenerator gen = mb.GetILGenerator();
// gen.Emit(OpCodes.Ldarg_0);
// gen.Emit(OpCodes.Ldarg_1);
// gen.Emit(OpCodes.Newobj, pceaCI);
// gen.Emit(OpCodes.Call, onPropertyChangedMI_pceArg);
// gen.Emit(OpCodes.Ret);
//}
//{
// MethodBuilder mb = VisitorUtil.DefineMethod(vs, onPropertyChangedMI_pceArg, ma);
// ILGenerator gen = mb.GetILGenerator();
// gen.Emit(OpCodes.Ldarg_0);
// gen.Emit(OpCodes.Call, pctPI.GetGetMethod());
// gen.Emit(OpCodes.Ldarg_0);
// gen.Emit(OpCodes.Ldarg_1);
// gen.Emit(OpCodes.Call, FirePropertyChangedMI);
// gen.Emit(OpCodes.Ret);
//}
// List<PropertyChangedEventHandler> PropertyChangedEventHandlers { get; }
//void OnPropertyChanged(String propertyName);
//void OnPropertyChanged(PropertyChangedEventArgs args);
return(p_pceHandlers);
}
protected void ImplementPropertyChangeOnProperty(PropertyInstance propertyInfo,
PropertyInstance p_propertyChangeTemplate, MethodInstance m_firePropertyChange, FieldInstance f_propertyChangeSupport)
{
// add property change detection and notification
if (propertyInfo.Getter == null || propertyInfo.Setter == null)
{
return;
}
if (InitializeEmbeddedMemberVisitor.IsEmbeddedMember(metaData, propertyInfo.Name))
{
return;
}
PropertyInstance p_getterMethodHandle = ImplementAssignedReadonlyProperty(propertyInfo.Name + "$MethodHandle",
new MethodHandleValueResolver(PropertyInfoProvider, propertyInfo.Name));
Type propertyType = propertyInfo.PropertyType.Type;
MethodInstance m_hasPropertyChanged = GetApplicableHasPropertyChangedOverload(propertyType);
// check value type of last parameter
bool isBoxingNeededForHasPropertyChanged = IsBoxingNeededForHasPropertyChangedOverload(m_hasPropertyChanged, propertyType);
IMethodVisitor mg = VisitMethod(propertyInfo.Setter);
Label l_finish = mg.NewLabel();
Label l_noOldValue = mg.NewLabel();
Label l_noChangeCheck = mg.NewLabel();
LocalVariableInfo loc_oldValue;
if (isBoxingNeededForHasPropertyChanged)
{
loc_oldValue = mg.NewLocal(typeof(Object));
}
else
{
loc_oldValue = mg.NewLocal(propertyType);
}
LocalVariableInfo loc_valueChanged = mg.NewLocal <bool>();
MethodInstance m_getSuper = EnhancerUtil.GetSuperGetter(propertyInfo);
bool relationProperty = m_getSuper.Name.EndsWith(ValueHolderIEC.GetNoInitSuffix());
// initialize flag with false
mg.Push(false);
mg.StoreLocal(loc_valueChanged);
// initialize oldValue with null
mg.PushNullOrZero(loc_oldValue.LocalType);
mg.StoreLocal(loc_oldValue);
if (relationProperty)
{
// check if a setter call to an UNINITIALIZED relation occured with value null
// if it the case there would be no PCE because oldValue & newValue are both null
// but we need a PCE in this special case
Label l_noSpecialHandling = mg.NewLabel();
FieldInstance f_state = State.GetAlreadyImplementedField(ValueHolderIEC.GetInitializedFieldName(propertyInfo.Name));
mg.GetThisField(f_state);
mg.PushEnum(ValueHolderState.INIT);
mg.IfCmp(typeof(ValueHolderState), CompareOperator.EQ, l_noSpecialHandling);
mg.Push(true);
mg.StoreLocal(loc_valueChanged);
mg.Mark(l_noSpecialHandling);
}
// check if value should be checked to decide for a PCE
mg.LoadLocal(loc_valueChanged);
mg.IfZCmp(CompareOperator.NE, l_noOldValue);
// get old field value calling super property getter
mg.LoadThis();
mg.InvokeOnExactOwner(m_getSuper);
if (isBoxingNeededForHasPropertyChanged)
{
mg.Box(propertyType);
}
mg.StoreLocal(loc_oldValue);
mg.Mark(l_noOldValue);
// set new field value calling super property setter
mg.LoadThis();
mg.LoadArg(0);
mg.InvokeOnExactOwner(EnhancerUtil.GetSuperSetter(propertyInfo));
mg.PopIfReturnValue(EnhancerUtil.GetSuperSetter(propertyInfo));
// check if value should be checked to decide for a PCE
mg.LoadLocal(loc_valueChanged);
mg.IfZCmp(CompareOperator.NE, l_noChangeCheck);
LocalVariableInfo loc_newValue = null;
if (isBoxingNeededForHasPropertyChanged)
{
loc_newValue = mg.NewLocal(typeof(Object)); // loc_1 Object newValue
// Object loc_1 = (Object)value;
mg.LoadArg(0);
mg.Box(propertyType);
mg.StoreLocal(loc_newValue);
}
mg.CallThisGetter(p_propertyChangeTemplate);
// call HasPropertyChanged (static)
mg.LoadThis(); // "this" as Object obj
mg.Push(propertyInfo.Name); // String propertyName
mg.LoadLocal(loc_oldValue);
if (loc_newValue != null)
{
mg.LoadLocal(loc_newValue);
}
else
{
mg.LoadArg(0);
}
mg.InvokeVirtual(m_hasPropertyChanged);
//// if (!result)
//// { return; }
mg.IfZCmp(CompareOperator.EQ, l_finish);
mg.Mark(l_noChangeCheck);
// call firePropertyChange on this
mg.LoadThis();
// propertyChangeSupport
mg.GetThisField(f_propertyChangeSupport);
// property
mg.CallThisGetter(p_getterMethodHandle);
// oldValue
mg.LoadLocal(loc_oldValue);
if (!isBoxingNeededForHasPropertyChanged && propertyType.IsValueType)
{
// old value has not already been boxed but it is now necessary
mg.ValueOf(propertyType);
}
// newValue
if (loc_newValue != null)
{
mg.LoadLocal(loc_newValue);
}
else
{
mg.LoadArg(0);
if (propertyType.IsValueType)
{
mg.ValueOf(propertyType);
}
}
// firePropertyChange(propertyChangeSupport, property, oldValue, newValue)
mg.InvokeVirtual(m_firePropertyChange);
// return
mg.Mark(l_finish);
mg.ReturnVoidOrThis();
mg.EndMethod();
}