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62 lines
1.6 KiB
Python
62 lines
1.6 KiB
Python
import attr
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import unicodedata
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@attr.s(frozen=True)
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class ExtractedText:
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segments = attr.ib()
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joiner = attr.ib(type=str)
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# XXX Use type annotations for attr types when support for Python 3.5 is dropped
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# XXX Also I think these are not validated?
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@property
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def text(self):
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return self.joiner.join(s.text for s in self.segments)
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def segment_id_for_pos(self, pos):
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i = 0
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for s in self.segments:
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if i <= pos < i + len(s.text):
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return s.id
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i += len(s.text)
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if i <= pos < i + len(self.joiner):
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return None
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i += len(self.joiner)
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NORM_NFC = 0
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def normalize(text, normalization):
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if normalization == NORM_NFC:
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return unicodedata.normalize('NFC', text)
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else:
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raise ValueError()
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@attr.s(frozen=True)
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class ExtractedTextSegment:
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id = attr.ib(type=str)
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text = attr.ib(type=str)
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@text.validator
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def check(self, attribute, value):
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if normalize(value, self.normalization) != value:
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raise ValueError('String "{}" is not normalized.'.format(value))
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normalization = attr.ib(default=NORM_NFC)
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test1 = ExtractedText([
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ExtractedTextSegment('s0', 'foo'),
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ExtractedTextSegment('s1', 'bar'),
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ExtractedTextSegment('s2', 'bazinga')
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], ' ')
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assert test1.text == 'foo bar bazinga'
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assert test1.segment_id_for_pos(0) == 's0'
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assert test1.segment_id_for_pos(3) == None
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assert test1.segment_id_for_pos(10) == 's2'
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# ExtractedTextSegment('foo', unicodedata.normalize('NFD', 'Schlyñ'))
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ExtractedTextSegment('foo', unicodedata.normalize('NFC', 'Schlyñ'))
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