Current File : //proc/985914/root/lib/python3/dist-packages/html5_parser/dom.py
#!/usr/bin/env python
# vim:fileencoding=utf-8
# License: Apache 2.0 Copyright: 2017, Kovid Goyal <kovid at kovidgoyal.net>
from __future__ import absolute_import, division, print_function, unicode_literals
from xml.dom.minidom import getDOMImplementation
from lxml.etree import _Comment
impl = getDOMImplementation()
try:
dict_items = dict.iteritems
except AttributeError:
dict_items = dict.items
def elem_name_parts(elem):
tag = elem.tag
if tag.startswith('{'):
uri, _, name = tag.rpartition('}')
if elem.prefix:
name = elem.prefix + ':' + name
return uri[1:], name
return None, tag
def attr_name_parts(name, elem, val):
if name.startswith('{'):
uri, _, name = name.rpartition('}')
uri = uri[1:]
for prefix, quri in dict_items(elem.nsmap):
if quri == uri:
break
else:
prefix = None
if prefix:
name = prefix + ':' + name
return uri, name, val
return None, name, val
def add_namespace_declarations(src, dest):
changed = src.nsmap
if changed:
p = src.getparent()
if p is not None:
# Only add namespace declarations different from the parent's
p = p.nsmap or {}
changed = {k: v for k, v in dict_items(changed) if v != p.get(k)}
for prefix, uri in dict_items(changed):
attr = ('xmlns:' + prefix) if prefix else 'xmlns'
dest.setAttributeNS('xmlns', attr, uri)
def adapt(source_tree, return_root=True, **kw):
source_root = source_tree.getroot()
uri, qname = elem_name_parts(source_root)
dest_tree = impl.createDocument(uri, qname, None)
dest_tree.doctype = source_tree.docinfo.doctype
dest_root = dest_tree.documentElement
stack = [(source_root, dest_root)]
while stack:
src, dest = stack.pop()
if src.text:
dest.appendChild(dest_tree.createTextNode(src.text))
add_namespace_declarations(src, dest)
for name, val in src.items():
dest.setAttributeNS(*attr_name_parts(name, src, val))
for child in src.iterchildren():
if isinstance(child, _Comment):
dchild = dest_tree.createComment((child.text or '').replace('--', '—'))
else:
dchild = dest_tree.createElementNS(*elem_name_parts(child))
stack.append((child, dchild))
dest.appendChild(dchild)
if child.tail:
dest.appendChild(dest_tree.createTextNode(child.tail))
return dest_root if return_root else dest_tree
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