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import os |
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import warnings |
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import regex |
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from browsepy.transform import StateMachine |
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class BlobTransform(StateMachine): |
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jumps = { |
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'start': { |
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'': 'text', |
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}, |
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'text': dict(**{ |
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'*': 'wildcard', |
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'**': 'wildcard', |
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'?': 'wildcard', |
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'[': 'range', |
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'[!': 'range', |
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'[]': 'range', |
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'{': 'group', |
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}, **{ |
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'\\%s' % c: 'text_literal' for c in '\\*?[{' |
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}), |
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'text_literal': { |
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'': 'text', |
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}, |
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'ignore': { |
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'': 'text', |
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}, |
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'wildcard': { |
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'': 'text', |
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}, |
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'range': { |
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']': 'text_literal', |
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'[.': 'posix_collating_symbol', |
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'[:': 'posix_character_class', |
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'[=': 'posix_equivalence_class', |
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}, |
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'range_literal': { |
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'': 'range', |
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}, |
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'posix_collating_symbol': { |
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'.]': 'ignore', |
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}, |
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'posix_character_class': { |
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':]': 'range_literal', |
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}, |
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'posix_equivalence_class': { |
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'=]': 'ignore', |
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}, |
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'group': { |
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'}': 'group_close', |
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}, |
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'group_close': { |
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'': 'text', |
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} |
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} |
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current = 'start' |
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def __init__(self, data, sep=os.sep): |
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self.sep = sep |
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self.jumps['start'][sep] = self.jumps['start'][''] |
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super(BlobTransform, self).__init__(data) |
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def flush(self): |
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return '%s$' % super(BlobTransform, self).flush() |
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def transform_posix_collating_class(self, data, mark, next): |
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warnings.warn( |
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'Posix collating symbols (like %s%s) are not supported.' |
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% (data, mark)) |
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return '.' |
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def transform_posix_equivalence_class(self, data, mark, next): |
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warnings.warn( |
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'Posix equivalence class expresions (like %s%s) are not supported.' |
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% (data, mark)) |
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return '.' |
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def transform_ignore(self, data, mark, next): |
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return '' |
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def transform_start(self, data, mark, next): |
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if mark == self.sep: |
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return '^' |
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return regex.escape(self.sep, special_only=True) |
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def transform_wildcard(self, data, mark, next): |
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if self.start == '**': |
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return '.*' |
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if self.start == '*': |
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return '[^%s]*' % self.sep |
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return '.' |
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def transform_text(self, data, mark, next): |
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return regex.escape(data, special_only=True) |
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def transform_range(self, data, mark, next): |
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if self.start == '[!': |
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return '[^%s' % data[2:] |
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if self.start == '[]': |
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return '[\\]%s' % data[2:] |
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return data |
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def transform_group(self, data, mark, next): |
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return '(%s' % ('|'.join(data[len(self.start):].split(','))) |
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def transform_group_close(self, data, mark, next): |
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return ')' |
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def translate(data, sep=os.sep): |
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self = BlobTransform(data) |
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return ''.join(self) |
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ergoithz /
browsepy
