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# XInclude processing
from lxml.includes cimport xinclude
cdef class XIncludeError(LxmlError):
u"""Error during XInclude processing.
"""
cdef class XInclude:
u"""XInclude(self)
XInclude processor.
Create an instance and call it on an Element to run XInclude
processing.
"""
cdef _ErrorLog _error_log
def __init__(self):
self._error_log = _ErrorLog()
@property
def error_log(self):
assert self._error_log is not None, "XInclude instance not initialised"
return self._error_log.copy()
def __call__(self, _Element node not None):
u"__call__(self, node)"
# We cannot pass the XML_PARSE_NOXINCNODE option as this would free
# the XInclude nodes - there may still be Python references to them!
# Therefore, we allow XInclude nodes to be converted to
# XML_XINCLUDE_START nodes. XML_XINCLUDE_END nodes are added as
# siblings. Tree traversal will simply ignore them as they are not
# typed as elements. The included fragment is added between the two,
# i.e. as a sibling, which does not conflict with traversal.
cdef int result
_assertValidNode(node)
assert self._error_log is not None, "XInclude processor not initialised"
if node._doc._parser is not None:
parse_options = node._doc._parser._parse_options
context = node._doc._parser._getParserContext()
c_context = <void*>context
else:
parse_options = 0
context = None
c_context = NULL
self._error_log.connect()
if tree.LIBXML_VERSION < 20704 or not c_context:
__GLOBAL_PARSER_CONTEXT.pushImpliedContext(context)
with nogil:
orig_loader = _register_document_loader()
if c_context:
result = xinclude.xmlXIncludeProcessTreeFlagsData(
node._c_node, parse_options, c_context)
else:
result = xinclude.xmlXIncludeProcessTree(node._c_node)
_reset_document_loader(orig_loader)
if tree.LIBXML_VERSION < 20704 or not c_context:
__GLOBAL_PARSER_CONTEXT.popImpliedContext()
self._error_log.disconnect()
if result == -1:
raise XIncludeError(
self._error_log._buildExceptionMessage(
u"XInclude processing failed"),
self._error_log)