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# Copyright © 2013-2023 Jakub Wilk <jwilk@jwilk.net>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the “Software”), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
'''
text manipulation functions
'''
import functools
import regex as re
def ltrim(s, n, *, char='…'):
if n <= 0:
return s and char
pat = re.compile(r'\X\X(\X{#})\Z'.replace('#', str(n - 1)))
match = pat.search(s)
if match is None:
return s
if n <= 1:
return char
return char + match.group(1)
def rtrim(s, n, *, char='…'):
if n <= 0:
return s and char
pat = re.compile(r'\A(\X{#})\X\X'.replace('#', str(n - 1)))
match = pat.match(s)
if match is None:
return s
if n <= 1:
return char
return match.group(1) + char
_camel_case_split = re.compile('([A-Z][^A-Z]*)').split
def camel_case_tokenizer(tokenizer):
@functools.wraps(tokenizer)
def new_tokenizer(s):
for word, offset in tokenizer(s):
if word.isupper():
yield word, offset
continue
for subword in _camel_case_split(word):
if subword:
yield subword, offset
offset += len(subword)
return new_tokenizer
__all__ = [
'camel_case_tokenizer',
'ltrim',
'rtrim',
]
# vim:ts=4 sts=4 sw=4 et
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