public void Execute(bool force = false)
{
var property = _propertyData.PropertyDefinition;
if (property == null)
{
FodyEnvironment.LogWarning("Skipping an unknown property because it has no property definition");
return;
}
if (!force && !HasBackingField(property))
{
FodyEnvironment.LogDebug($"\t\tSkipping '{property.Name}' because it has no backing field");
return;
}
if (ImplementsICommand(property))
{
FodyEnvironment.LogDebug($"\t\tSkipping '{property.Name}' because it implements ICommand");
return;
}
FodyEnvironment.LogDebug("\t\t" + property.Name);
try
{
EnsureStaticConstructor(property.DeclaringType);
AddChangeNotificationHandlerField(property, _propertyData);
var fieldDefinition = AddPropertyFieldDefinition(property);
if (!AddPropertyRegistration(property, _propertyData))
{
return;
}
var fieldReference = GetFieldReference(property.DeclaringType, fieldDefinition.Name, true);
AddGetValueCall(property, fieldReference);
AddSetValueCall(property, fieldReference, _propertyData.IsReadOnly);
RemoveBackingField(property);
}
catch (Exception ex)
{
FodyEnvironment.LogError($"\t\tFailed to handle property '{property.DeclaringType.Name}.{property.Name}'\n{ex.Message}\n{ex.StackTrace}");
#if DEBUG
Debugger.Launch();
#endif
}
}
private GenericInstanceType GetEventHandlerAdvancedPropertyChangedEventArgs(PropertyDefinition property)
{
var genericHandlerType = _msCoreReferenceFinder.GetCoreTypeReference("System.EventHandler`1");
if (genericHandlerType == null)
{
FodyEnvironment.LogError("Expected to find EventHandler<T>, but type was not found");
return(null);
}
var advancedPropertyChangedEventArgsType = property.Module.FindType("Catel.Core", "Catel.Data.AdvancedPropertyChangedEventArgs");
var handlerType = new GenericInstanceType(genericHandlerType);
handlerType.GenericArguments.Add(advancedPropertyChangedEventArgsType);
return(handlerType);
}
private void RemoveBackingField(PropertyDefinition property)
{
var fieldName = GetBackingFieldName(property);
var declaringType = property.DeclaringType;
var field = GetFieldDefinition(declaringType, fieldName, false);
if (field != null)
{
foreach (var ctor in declaringType.GetConstructors())
{
var ctorBody = ctor.Body;
ctorBody.SimplifyMacros();
var instructions = ctorBody.Instructions;
var validInstructionCounter = 0;
for (int i = 0; i < instructions.Count; i++)
{
var instruction = instructions[i];
if (instruction.IsOpCode(OpCodes.Nop))
{
continue;
}
validInstructionCounter++;
if (instruction.UsesField(field))
{
FodyEnvironment.LogDebug($"Field '{declaringType.FullName}.{field.Name}' is used in ctor '{ctor}'. Converting field usage to property usage to maintain compatibility with Catel generated properties.");
if (instruction.IsOpCode(OpCodes.Stfld))
{
// Setter
instruction.OpCode = OpCodes.Call;
// Note: make sure to support generic types
MethodReference setter = property.SetMethod;
var genericInstanceType = declaringType.MakeGenericIfRequired() as GenericInstanceType;
if (genericInstanceType != null)
{
setter = setter.MakeHostInstanceGeneric(genericInstanceType.GenericArguments.ToArray());
}
instruction.Operand = declaringType.Module.ImportReference(setter);
// Now move this to the end of the method (we need to call the base ctor first to have the property bag ready)
var baseIndex = ctor.FindBaseConstructorIndex();
if (baseIndex >= 0)
{
// After a call to a ctor, a double nop is required
var indexToInsert = baseIndex + 1;
if (instructions.IsNextInstructionOpCode(baseIndex, OpCodes.Nop))
{
indexToInsert++;
if (instructions.IsNextInstructionOpCode(baseIndex + 1, OpCodes.Nop))
{
indexToInsert++;
}
}
instructions.MoveInstructionsToPosition(i - 2, 3, indexToInsert);
}
}
else if (instruction.IsOpCode(OpCodes.Ldfld))
{
// Getter
instruction.OpCode = OpCodes.Call;
// Note: make sure to support generic types
MethodReference getter = property.GetMethod;
var genericInstanceType = declaringType.MakeGenericIfRequired() as GenericInstanceType;
if (genericInstanceType != null)
{
getter = getter.MakeHostInstanceGeneric(genericInstanceType.GenericArguments.ToArray());
}
instruction.Operand = declaringType.Module.ImportReference(getter);
// Now move this to the end of the method (we need to call the base ctor first to have the property bag ready)
var baseIndex = ctor.FindBaseConstructorIndex();
if (baseIndex >= 0)
{
// After a call to a ctor, a double nop is required
var indexToInsert = baseIndex + 1;
if (instructions.IsNextInstructionOpCode(baseIndex, OpCodes.Nop))
{
indexToInsert++;
if (instructions.IsNextInstructionOpCode(baseIndex + 1, OpCodes.Nop))
{
indexToInsert++;
}
}
instructions.MoveInstructionsToPosition(i - 2, 3, indexToInsert);
}
}
else if (instruction.IsOpCode(OpCodes.Ldflda))
{
// Probably setting a generic field value to a value by directly using an address. Since this was code like this:
//
// call instance !0 MyCompany.Models.Base.ItemsModel`1 < !T >::get_SelectedItem()
// initobj !T
//
// We need to generate code like this:
//
// ldloca.s local
// initobj !T
// ldloc.0
// call instance void Catel.Fody.TestAssembly.CSharp6_AutoPropertyInitializer_Generic_ExpectedCode`1 < !T >::set_SelectedItem(!0)
// Note: make sure to support generic types
MethodReference setter = property.SetMethod;
var genericInstanceType = declaringType.MakeGenericIfRequired() as GenericInstanceType;
if (genericInstanceType != null)
{
setter = setter.MakeHostInstanceGeneric(genericInstanceType.GenericArguments.ToArray());
}
var variable = new VariableDefinition(property.PropertyType.MakeGenericIfRequired());
ctorBody.Variables.Add(variable);
ctorBody.InitLocals = true;
var newInstructions = new List <Instruction>();
newInstructions.Add(Instruction.Create(OpCodes.Ldloca, variable));
newInstructions.Add(instructions[i + 1]); // Just copy this initobj !T instruction
newInstructions.Add(Instruction.Create(OpCodes.Ldloc, variable));
newInstructions.Add(Instruction.Create(OpCodes.Call, setter));
// Remove 3 instructions
// ldarg
// ldflda
// init T
instructions.RemoveAt(i);
instructions.RemoveAt(i);
if (instructions[i - 1].IsOpCode(OpCodes.Ldarg, OpCodes.Ldarg_0))
{
newInstructions.Insert(0, Instruction.Create(OpCodes.Ldarg_0));
instructions.RemoveAt(i - 1);
}
// Now move this to the end of the method (we need to call the base ctor first to have the property bag ready)
var baseIndex = ctor.FindBaseConstructorIndex();
if (baseIndex >= 0)
{
// After a call to a ctor, a double nop is required
var indexToInsert = baseIndex + 1;
if (instructions.IsNextInstructionOpCode(baseIndex, OpCodes.Nop))
{
indexToInsert++;
if (instructions.IsNextInstructionOpCode(baseIndex + 1, OpCodes.Nop))
{
indexToInsert++;
}
}
instructions.Insert(indexToInsert, newInstructions);
}
else
{
FodyEnvironment.LogError($"Field '{declaringType.FullName}.{field.Name}' is used in ctor '{ctor}'. A rare condition occurred (no base ctor found), please contact support");
}
}
else
{
FodyEnvironment.LogError($"Field '{declaringType.FullName}.{field.Name}' is used in ctor '{ctor}'. Tried to convert it to property usage, but OpCode '{instruction.OpCode}' is not supported. Please raise an issue.");
}
}
}
ctorBody.OptimizeMacros();
ctor.UpdateDebugInfo();
}
declaringType.Fields.Remove(field);
}
}