| ######################## 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 .charsetprober import CharSetProber |
| from .enums import ProbingState |
| |
| |
| class CharSetGroupProber(CharSetProber): |
| def __init__(self, lang_filter=None): |
| super().__init__(lang_filter=lang_filter) |
| self._active_num = 0 |
| self.probers = [] |
| self._best_guess_prober = None |
| |
| def reset(self): |
| super().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 |
| |
| @property |
| 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 |
| |
| @property |
| 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 |
| if 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 |
| if 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 |
