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| ######################## BEGIN LICENSE BLOCK ######################## | |
| # The Original Code is Mozilla Communicator client code. | |
| # | |
| # The Initial Developer of the Original Code is | |
| # Netscape Communications Corporation. | |
| # Portions created by the Initial Developer are Copyright (C) 1998 | |
| # the Initial Developer. All Rights Reserved. | |
| # | |
| # Contributor(s): | |
| # Mark Pilgrim - port to Python | |
| # | |
| # This library is free software; you can redistribute it and/or | |
| # modify it under the terms of the GNU Lesser General Public | |
| # License as published by the Free Software Foundation; either | |
| # version 2.1 of the License, or (at your option) any later version. | |
| # | |
| # This library is distributed in the hope that it will be useful, | |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| # Lesser General Public License for more details. | |
| # | |
| # You should have received a copy of the GNU Lesser General Public | |
| # License along with this library; if not, write to the Free Software | |
| # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
| # 02110-1301 USA | |
| ######################### END LICENSE BLOCK ######################### | |
| from .enums import ProbingState | |
| from .charsetprober import CharSetProber | |
| class CharSetGroupProber(CharSetProber): | |
| def __init__(self, lang_filter=None): | |
| super(CharSetGroupProber, self).__init__(lang_filter=lang_filter) | |
| self._active_num = 0 | |
| self.probers = [] | |
| self._best_guess_prober = None | |
| def reset(self): | |
| super(CharSetGroupProber, self).reset() | |
| self._active_num = 0 | |
| for prober in self.probers: | |
| if prober: | |
| prober.reset() | |
| prober.active = True | |
| self._active_num += 1 | |
| self._best_guess_prober = None | |
| def charset_name(self): | |
| if not self._best_guess_prober: | |
| self.get_confidence() | |
| if not self._best_guess_prober: | |
| return None | |
| return self._best_guess_prober.charset_name | |
| def language(self): | |
| if not self._best_guess_prober: | |
| self.get_confidence() | |
| if not self._best_guess_prober: | |
| return None | |
| return self._best_guess_prober.language | |
| def feed(self, byte_str): | |
| for prober in self.probers: | |
| if not prober: | |
| continue | |
| if not prober.active: | |
| continue | |
| state = prober.feed(byte_str) | |
| if not state: | |
| continue | |
| if state == ProbingState.FOUND_IT: | |
| self._best_guess_prober = prober | |
| self._state = ProbingState.FOUND_IT | |
| return self.state | |
| elif state == ProbingState.NOT_ME: | |
| prober.active = False | |
| self._active_num -= 1 | |
| if self._active_num <= 0: | |
| self._state = ProbingState.NOT_ME | |
| return self.state | |
| return self.state | |
| def get_confidence(self): | |
| state = self.state | |
| if state == ProbingState.FOUND_IT: | |
| return 0.99 | |
| elif state == ProbingState.NOT_ME: | |
| return 0.01 | |
| best_conf = 0.0 | |
| self._best_guess_prober = None | |
| for prober in self.probers: | |
| if not prober: | |
| continue | |
| if not prober.active: | |
| self.logger.debug('%s not active', prober.charset_name) | |
| continue | |
| conf = prober.get_confidence() | |
| self.logger.debug('%s %s confidence = %s', prober.charset_name, prober.language, conf) | |
| if best_conf < conf: | |
| best_conf = conf | |
| self._best_guess_prober = prober | |
| if not self._best_guess_prober: | |
| return 0.0 | |
| return best_conf | |