57 lines
2.0 KiB
Python
57 lines
2.0 KiB
Python
from lxml import etree
|
|
from xmodule.editing_module import XMLEditingDescriptor
|
|
from xmodule.xml_module import XmlDescriptor
|
|
import logging
|
|
from xblock.fields import String, Scope
|
|
from exceptions import SerializationError
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class RawDescriptor(XmlDescriptor, XMLEditingDescriptor):
|
|
"""
|
|
Module that provides a raw editing view of its data and children. It
|
|
requires that the definition xml is valid.
|
|
"""
|
|
data = String(help="XML data for the module", default="", scope=Scope.content)
|
|
|
|
@classmethod
|
|
def definition_from_xml(cls, xml_object, system):
|
|
return {'data': etree.tostring(xml_object, pretty_print=True, encoding='unicode')}, []
|
|
|
|
def definition_to_xml(self, resource_fs):
|
|
try:
|
|
return etree.fromstring(self.data)
|
|
except etree.XMLSyntaxError as err:
|
|
# Can't recover here, so just add some info and
|
|
# re-raise
|
|
lines = self.data.split('\n')
|
|
line, offset = err.position
|
|
msg = (
|
|
u"Unable to create xml for module {loc}. "
|
|
u"Context: '{context}'"
|
|
).format(
|
|
context=lines[line - 1][offset - 40:offset + 40],
|
|
loc=self.location,
|
|
)
|
|
raise SerializationError(self.location, msg)
|
|
|
|
|
|
class EmptyDataRawDescriptor(XmlDescriptor, XMLEditingDescriptor):
|
|
"""
|
|
Version of RawDescriptor for modules which may have no XML data,
|
|
but use XMLEditingDescriptor for import/export handling.
|
|
"""
|
|
data = String(default='', scope=Scope.content)
|
|
|
|
@classmethod
|
|
def definition_from_xml(cls, xml_object, system):
|
|
if len(xml_object) == 0 and len(xml_object.items()) == 0:
|
|
return {'data': ''}, []
|
|
return {'data': etree.tostring(xml_object, pretty_print=True, encoding='unicode')}, []
|
|
|
|
def definition_to_xml(self, resource_fs):
|
|
if self.data:
|
|
return etree.fromstring(self.data)
|
|
return etree.Element(self.category)
|