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87 lines
3.1 KiB
Python
87 lines
3.1 KiB
Python
######################## BEGIN LICENSE BLOCK ########################
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# The Original Code is mozilla.org code.
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#
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# The Initial Developer of the Original Code is
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# Netscape Communications Corporation.
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# Portions created by the Initial Developer are Copyright (C) 1998
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# the Initial Developer. All Rights Reserved.
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#
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# Contributor(s):
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# Mark Pilgrim - port to Python
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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# 02110-1301 USA
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######################### END LICENSE BLOCK #########################
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from . import constants
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from .escsm import (HZSMModel, ISO2022CNSMModel, ISO2022JPSMModel,
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ISO2022KRSMModel)
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from .charsetprober import CharSetProber
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from .codingstatemachine import CodingStateMachine
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from .compat import wrap_ord
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class EscCharSetProber(CharSetProber):
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def __init__(self):
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CharSetProber.__init__(self)
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self._mCodingSM = [
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CodingStateMachine(HZSMModel),
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CodingStateMachine(ISO2022CNSMModel),
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CodingStateMachine(ISO2022JPSMModel),
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CodingStateMachine(ISO2022KRSMModel)
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]
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self.reset()
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def reset(self):
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CharSetProber.reset(self)
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for codingSM in self._mCodingSM:
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if not codingSM:
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continue
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codingSM.active = True
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codingSM.reset()
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self._mActiveSM = len(self._mCodingSM)
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self._mDetectedCharset = None
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def get_charset_name(self):
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return self._mDetectedCharset
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def get_confidence(self):
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if self._mDetectedCharset:
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return 0.99
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else:
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return 0.00
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def feed(self, aBuf):
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for c in aBuf:
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# PY3K: aBuf is a byte array, so c is an int, not a byte
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for codingSM in self._mCodingSM:
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if not codingSM:
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continue
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if not codingSM.active:
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continue
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codingState = codingSM.next_state(wrap_ord(c))
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if codingState == constants.eError:
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codingSM.active = False
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self._mActiveSM -= 1
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if self._mActiveSM <= 0:
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self._mState = constants.eNotMe
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return self.get_state()
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elif codingState == constants.eItsMe:
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self._mState = constants.eFoundIt
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self._mDetectedCharset = codingSM.get_coding_state_machine() # nopep8
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return self.get_state()
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return self.get_state()
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