public static void ValidateBeforeAttachedPropertyConversion(this PropertyDefinition property, TypeDefinition type)
{
CustomAttribute attribute = property.GetAttachedPropertyAttribute();
FieldDefinition backingField = type.GetBackingFieldForProperty(property);
if (attribute != null && backingField == null)
{
throw new WeavingException("Cannot convert to attached property because the property does not have a backing field.");
}
if (property.GetMethod == null || property.SetMethod == null)
{
throw new WeavingException("Cannot convert to attached property because the property is not an auto property.");
}
if (!property.GetMethod.IsStatic)
{
throw new WeavingException("Cannot convert to attached property because the property is not static.");
}
}
protected override bool ShouldConvert(TypeDefinition type, PropertyDefinition property)
{
CustomAttribute typeAttribute = type.GetAttachedPropertyAttribute();
CustomAttribute propertyAttribute = property.GetAttachedPropertyAttribute();
FieldDefinition backingField = type.GetBackingFieldForProperty(property);
if (typeAttribute == null && propertyAttribute == null)
{
return(false);
}
if (typeAttribute != null)
{
if (backingField == null)
{
return(false);
}
if (property.SetMethod == null)
{
return(false);
}
if (!property.GetMethod.IsStatic)
{
return(false);
}
if (property.CustomAttributes.Any(attribute => attribute.AttributeType.Name == Consts.ExcludeAttachedPropertyAttribute))
{
return(false);
}
}
return(true);
}
private void AddInitializationToStaticConstructor(TypeDefinition type, PropertyDefinition property, FieldDefinition field, Range instructionRange, int startIndex)
{
MethodDefinition staticConstructor = type.GetStaticConstructor();
List <Instruction> instructions = CreateInstructionsUpToRegistration(type, property, instructionRange, property.GetAttachedPropertyAttribute());
instructions.Add(Instruction.Create(OpCodes.Call, _registerAttachedProperty));
instructions.Add(Instruction.Create(OpCodes.Stsfld, field));
instructions.Reverse();
foreach (Instruction instruction in instructions)
{
staticConstructor.Body.Instructions.Insert(startIndex, instruction);
}
}