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Current File : //lib/calibre/calibre/utils/mreplace.py

# multiple replace from dictionary : http://code.activestate.com/recipes/81330/

__license__   = 'GPL v3'
__copyright__ = '2010, sengian <sengian1 @ gmail.com>'
__docformat__ = 'restructuredtext en'

import re
try:
    from collections import UserDict
except ImportError:
    from UserDict import UserDict


class MReplace(UserDict):

    def __init__(self, data=None, case_sensitive=True):
        UserDict.__init__(self, data)
        self.re = None
        self.regex = None
        self.case_sensitive = case_sensitive
        self.compile_regex()

    def compile_regex(self):
        if len(self.data) > 0:
            keys = sorted(self.data, key=len, reverse=True)
            if isinstance(keys[0], bytes):
                tmp = b"(%s)" % b"|".join(map(re.escape, keys))
            else:
                tmp = "(%s)" % "|".join(map(re.escape, keys))
            if self.re != tmp:
                self.re = tmp
                if self.case_sensitive:
                    self.regex = re.compile(self.re)
                else:
                    self.regex = re.compile(self.re, re.I)

    def __call__(self, mo):
        return self[mo.string[mo.start():mo.end()]]

    def mreplace(self, text):
        # Replace without regex compile
        if len(self.data) < 1 or self.re is None:
            return text
        return self.regex.sub(self, text)

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