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from __future__ import absolute_import, division, unicode_literals from genshi.core import QName from genshi.core import START, END, XML_NAMESPACE, DOCTYPE, TEXT from genshi.core import START_NS, END_NS, START_CDATA, END_CDATA, PI, COMMENT from . import base from ..constants import voidElements, namespaces class TreeWalker(base.TreeWalker): def __iter__(self): # Buffer the events so we can pass in the following one previous = None for event in self.tree: if previous is not None: for token in self.tokens(previous, event): yield token previous = event # Don't forget the final event! if previous is not None: for token in self.tokens(previous, None): yield token def tokens(self, event, next): kind, data, _ = event if kind == START: tag, attribs = data name = tag.localname namespace = tag.namespace converted_attribs = {} for k, v in attribs: if isinstance(k, QName): converted_attribs[(k.namespace, k.localname)] = v else: converted_attribs[(None, k)] = v if namespace == namespaces["html"] and name in voidElements: for token in self.emptyTag(namespace, name, converted_attribs, not next or next[0] != END or next[1] != tag): yield token else: yield self.startTag(namespace, name, converted_attribs) elif kind == END: name = data.localname namespace = data.namespace if namespace != namespaces["html"] or name not in voidElements: yield self.endTag(namespace, name) elif kind == COMMENT: yield self.comment(data) elif kind == TEXT: for token in self.text(data): yield token elif kind == DOCTYPE: yield self.doctype(*data) elif kind in (XML_NAMESPACE, DOCTYPE, START_NS, END_NS, START_CDATA, END_CDATA, PI): pass else: yield self.unknown(kind)
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