# patches for 2.2

# add support for the xml: namespace
from xml.dom.pulldom import PullDOM
if not PullDOM()._ns_contexts[0]:
    def _init(self, documentFactory=None):
        from xml.dom import XML_NAMESPACE
        self.documentFactory = documentFactory
        self.firstEvent = [None, None]
        self.lastEvent = self.firstEvent
        self.elementStack = []
        self.push = self.elementStack.append
        try:
            self.pop = self.elementStack.pop
        except AttributeError:
            pass
        self._ns_contexts = [{XML_NAMESPACE:'xml'}]
        self._current_context = self._ns_contexts[-1]
        self.pending_events = []
    import new
    PullDOM.__init__ = new.instancemethod(_init, None, PullDOM)

# reversable htmlentitydefs mappings
try:
  from htmlentitydefs import name2codepoint, codepoint2name
except:
  import htmlentitydefs
  htmlentitydefs.name2codepoint={}
  htmlentitydefs.codepoint2name={}
  for (name,codepoint) in htmlentitydefs.entitydefs.iteritems():
    if codepoint.startswith('&#'): codepoint=unichr(int(codepoint[2:-1]))
    htmlentitydefs.name2codepoint[name]=ord(codepoint)
    htmlentitydefs.codepoint2name[ord(codepoint)]=name