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from __future__ import absolute_import, division, unicode_literals
from xml.sax.xmlreader import AttributesNSImpl
from ..constants import adjustForeignAttributes, unadjustForeignAttributes
prefix_mapping = {}
for prefix, localName, namespace in adjustForeignAttributes.values():
if prefix is not None:
prefix_mapping[prefix] = namespace
def to_sax(walker, handler):
"""Call SAX-like content handler based on treewalker walker
:arg walker: the treewalker to use to walk the tree to convert it
:arg handler: SAX handler to use
"""
handler.startDocument()
for prefix, namespace in prefix_mapping.items():
handler.startPrefixMapping(prefix, namespace)
for token in walker:
type = token["type"]
if type == "Doctype":
continue
elif type in ("StartTag", "EmptyTag"):
attrs = AttributesNSImpl(token["data"],
unadjustForeignAttributes)
handler.startElementNS((token["namespace"], token["name"]),
token["name"],
attrs)
if type == "EmptyTag":
handler.endElementNS((token["namespace"], token["name"]),
token["name"])
elif type == "EndTag":
handler.endElementNS((token["namespace"], token["name"]),
token["name"])
elif type in ("Characters", "SpaceCharacters"):
handler.characters(token["data"])
elif type == "Comment":
pass
else:
assert False, "Unknown token type"
for prefix, namespace in prefix_mapping.items():
handler.endPrefixMapping(prefix)
handler.endDocument()
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