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comparison planemo/lib/python3.7/site-packages/chardet/charsetgroupprober.py @ 0:d30785e31577 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:18:57 -0400
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-1:000000000000 0:d30785e31577
1 ######################## BEGIN LICENSE BLOCK ########################
2 # The Original Code is Mozilla Communicator client code.
3 #
4 # The Initial Developer of the Original Code is
5 # Netscape Communications Corporation.
6 # Portions created by the Initial Developer are Copyright (C) 1998
7 # the Initial Developer. All Rights Reserved.
8 #
9 # Contributor(s):
10 # Mark Pilgrim - port to Python
11 #
12 # This library is free software; you can redistribute it and/or
13 # modify it under the terms of the GNU Lesser General Public
14 # License as published by the Free Software Foundation; either
15 # version 2.1 of the License, or (at your option) any later version.
16 #
17 # This library is distributed in the hope that it will be useful,
18 # but WITHOUT ANY WARRANTY; without even the implied warranty of
19 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 # Lesser General Public License for more details.
21 #
22 # You should have received a copy of the GNU Lesser General Public
23 # License along with this library; if not, write to the Free Software
24 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
25 # 02110-1301 USA
26 ######################### END LICENSE BLOCK #########################
27
28 from .enums import ProbingState
29 from .charsetprober import CharSetProber
30
31
32 class CharSetGroupProber(CharSetProber):
33 def __init__(self, lang_filter=None):
34 super(CharSetGroupProber, self).__init__(lang_filter=lang_filter)
35 self._active_num = 0
36 self.probers = []
37 self._best_guess_prober = None
38
39 def reset(self):
40 super(CharSetGroupProber, self).reset()
41 self._active_num = 0
42 for prober in self.probers:
43 if prober:
44 prober.reset()
45 prober.active = True
46 self._active_num += 1
47 self._best_guess_prober = None
48
49 @property
50 def charset_name(self):
51 if not self._best_guess_prober:
52 self.get_confidence()
53 if not self._best_guess_prober:
54 return None
55 return self._best_guess_prober.charset_name
56
57 @property
58 def language(self):
59 if not self._best_guess_prober:
60 self.get_confidence()
61 if not self._best_guess_prober:
62 return None
63 return self._best_guess_prober.language
64
65 def feed(self, byte_str):
66 for prober in self.probers:
67 if not prober:
68 continue
69 if not prober.active:
70 continue
71 state = prober.feed(byte_str)
72 if not state:
73 continue
74 if state == ProbingState.FOUND_IT:
75 self._best_guess_prober = prober
76 return self.state
77 elif state == ProbingState.NOT_ME:
78 prober.active = False
79 self._active_num -= 1
80 if self._active_num <= 0:
81 self._state = ProbingState.NOT_ME
82 return self.state
83 return self.state
84
85 def get_confidence(self):
86 state = self.state
87 if state == ProbingState.FOUND_IT:
88 return 0.99
89 elif state == ProbingState.NOT_ME:
90 return 0.01
91 best_conf = 0.0
92 self._best_guess_prober = None
93 for prober in self.probers:
94 if not prober:
95 continue
96 if not prober.active:
97 self.logger.debug('%s not active', prober.charset_name)
98 continue
99 conf = prober.get_confidence()
100 self.logger.debug('%s %s confidence = %s', prober.charset_name, prober.language, conf)
101 if best_conf < conf:
102 best_conf = conf
103 self._best_guess_prober = prober
104 if not self._best_guess_prober:
105 return 0.0
106 return best_conf