def set(self, object, value, _getattr=getattr, _setattr=setattr):
if self.readonly:
raise TypeError("Can't set values on read-only fields "
"(name=%s, class=%s.%s)"
% (self.__name__,
object.__class__.__module__,
object.__class__.__name__))
if IImage.providedBy(value):
_setattr(object, self.__name__, value)
elif IFileData.providedBy(value):
data = _getattr(object, self.__name__, None)
if not IImage.providedBy(data):
data = Image()
data.data = value.data
data.mimeType = value.mimeType
data.filename = value.filename
_setattr(object, self.__name__, data)
else:
data = removeSecurityProxy(data)
data.data = value.data
data.mimeType = value.mimeType
data.filename = value.filename
_setattr(object, self.__name__, data)
if self.scale and (self.maxWidth < data.width or
self.maxHeight < data.height):
data.scale(self.maxWidth, self.maxHeight)
elif IFileDataClear.providedBy(value):
data = _getattr(object, self.__name__, None)
if IImage.providedBy(data):
data.clear()
else:
_setattr(object, self.__name__, Image())
elif IFileDataNoValue.providedBy(value):
pass
else:
self.set(object, FileData(value), _getattr, _setattr)
