46 行
977 B
Python
46 行
977 B
Python
import unicodedata
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class CommonModule:
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@staticmethod
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def is_wide (
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c: str) \
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-> bool:
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return unicodedata.east_asian_width (c) in ['F', 'W', 'A']
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@classmethod
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def len_by_full (
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cls,
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string: str) \
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-> float:
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return sum (1 if cls.is_wide (c) else .5 for c in string)
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@classmethod
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def index_by_f2c (
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cls,
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string: str,
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index: float) \
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-> int:
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i: int = 0
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work: str = ''
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for c in string:
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work += c
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if cls.len_by_full (work) > index:
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break
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else:
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i += 1
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return i
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@classmethod
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def mid_by_full (
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cls,
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string: str,
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start: float,
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length: float) \
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-> str:
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trimmed_left: str = string[cls.index_by_f2c (string, start):]
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return trimmed_left[:cls.index_by_f2c (trimmed_left, length)]
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