def __init__(self, lexer):
self._lexer = lexer
self.stream = TokenStream(self._lexer.get_stream())
self.out_stream = []
self.ctx = {}
self.last = ParsedData('initial', 'initial')
self._open_tags = []
def __init__(self, lexer):
self._lexer = lexer
self.stream = TokenStream(self._lexer.get_stream())
self.out_stream = []
self.ctx = {}
self.last = ParsedData('initial', 'initial')
self._open_tags = []
def filter(self, stream):
"""
Apply some filters on the stream
so we can modify the stream after the
tokenize process.
"""
for filter_func in self.filters:
stream = TokenStream(filter_func(stream))
return stream
def tokenize(self):
"""
Go through the text and tokenize it...
This method goes through the text, and calls for
every change of ``self.pos`` the whole ``self.scan_re``.
Then it tries to match the text from ``self.pos`` to ``self.max``.
If matched try to call a *match_handler*, to get a token stream.
If no *match_handler* defined, add a standardized `MarkupToken` to the stack.
If no regular expression matched on the text it handles it as
text and produce a `MarkupToken` with the name "text".
"""
while self.pos < self.max_length:
for name, regex, handler in self.scan_re:
m = self.match(regex)
# if no match we try again with the next rule
if not m:
continue
self.stack.flush_text()
if handler:
if hasattr(self, handler):
# try to handle the match with the `handler` method
stream = getattr(self, handler)(m)
if stream:
for token in stream:
if not isinstance(token, MarkupToken):
raise TokenError(
'%r is no instance `MarkupToken`' %
token)
self.stack.push(token)
else:
raise HandlerNotFound(
'can not find %r in %r' %
(handler, self.__class__.__name__))
else:
# push the standardized token to the stack
self.stack.push(
MarkupToken(name, m.group(), m, **m.groupdict()))
self.pos = self._end_pos
break
else:
# no rex matched the text. send one char into the text buffer
if self.pos < self.max_length:
self.stack.write_text(self.text[self.pos])
else:
self.stack.flush_text()
self.pos += 1
self.stack.flush_text()
self._parsed = True
self.stream = self.filter(TokenStream(self.stack.flush()))
return self.stream
class TokenStreamParser(object):
# tags, must be closed before generate the output:
# {'name': '</closetag>'}
tags_tc = {}
# ('handler_name', 'token_name_to_handle')
handlers = []
def __init__(self, lexer):
self._lexer = lexer
self.stream = TokenStream(self._lexer.get_stream())
self.out_stream = []
self.ctx = {}
self.last = ParsedData('initial', 'initial')
self._open_tags = []
def parse(self):
handler_names = []
if self.handlers:
for entry in self.handlers:
name = entry[0]
if not hasattr(self, name):
raise HandlerNotFound('Can\'t find the handler %r in %r' % (
name, self.__class__.__name__
))
handler_names.append(name)
hitn = False
else:
hitn = True
for token in self.stream:
if not isinstance(token, MarkupToken):
raise TokenError(
'%r is no instance of \'MarkupToken\'' % token
)
if token.name in handler_names or hitn:
if hitn:
handler = token.name
else:
handler = self.handlers[handler_names.index(token.name)]
if hasattr(self, handler):
getattr(self, handler)(token)
else:
raise HandlerNotFound('Can\'t find the handler %r in %r' % (
handler, self.__class__.__name__
))
else:
self.push(ParsedData('text', escape_html(token.data)))
def push(self, token):
if token:
if not isinstance(token, ParsedData):
raise TokenError(
'%r is no instance of \'ParsedData\'' % token
)
self.out_stream.append(token)
self.last = self.out_stream[-1]
def pushmany(self, token_list):
for token in token_list:
self.push(token)
def peek(self):
return self.stream.look()
def peekmany(self, num=1):
tokens = self.stream.fetch_until(num)
for tok in tokens:
self.stream.feed(tok)
return tokens
# some functions we use for handling open and closing
# tags
def open_state(self, name):
if not name in self.ctx:
self.ctx[name] = True
else:
#FIXME: should we raise an error?
pass
def close_state(self, name):
if name in self.ctx:
self.ctx[name] = False
def rev_state(self, name):
self.ctx[name] = not self.ctx.get(name, False)
def check_open_state(self, name):
return self.ctx.get(name, False)
def get_output(self, text):
raise NotImplementedError
class TokenStreamParser(object):
# tags, must be closed before generate the output:
# {'name': '</closetag>'}
tags_tc = {}
# ('handler_name', 'token_name_to_handle')
handlers = []
def __init__(self, lexer):
self._lexer = lexer
self.stream = TokenStream(self._lexer.get_stream())
self.out_stream = []
self.ctx = {}
self.last = ParsedData('initial', 'initial')
self._open_tags = []
def parse(self):
handler_names = []
if self.handlers:
for entry in self.handlers:
name = entry[0]
if not hasattr(self, name):
raise HandlerNotFound('Can\'t find the handler %r in %r' %
(name, self.__class__.__name__))
handler_names.append(name)
hitn = False
else:
hitn = True
for token in self.stream:
if not isinstance(token, MarkupToken):
raise TokenError('%r is no instance of \'MarkupToken\'' %
token)
if token.name in handler_names or hitn:
if hitn:
handler = token.name
else:
handler = self.handlers[handler_names.index(token.name)]
if hasattr(self, handler):
getattr(self, handler)(token)
else:
raise HandlerNotFound('Can\'t find the handler %r in %r' %
(handler, self.__class__.__name__))
else:
self.push(ParsedData('text', escape_html(token.data)))
def push(self, token):
if token:
if not isinstance(token, ParsedData):
raise TokenError('%r is no instance of \'ParsedData\'' % token)
self.out_stream.append(token)
self.last = self.out_stream[-1]
def pushmany(self, token_list):
for token in token_list:
self.push(token)
def peek(self):
return self.stream.look()
def peekmany(self, num=1):
tokens = self.stream.fetch_until(num)
for tok in tokens:
self.stream.feed(tok)
return tokens
# some functions we use for handling open and closing
# tags
def open_state(self, name):
if not name in self.ctx:
self.ctx[name] = True
else:
#FIXME: should we raise an error?
pass
def close_state(self, name):
if name in self.ctx:
self.ctx[name] = False
def rev_state(self, name):
self.ctx[name] = not self.ctx.get(name, False)
def check_open_state(self, name):
return self.ctx.get(name, False)
def get_output(self, text):
raise NotImplementedError
