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import collections |
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from coala_utils.decorators import generate_repr |
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class ConflictError(Exception): |
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pass |
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@generate_repr('change', 'delete', 'add_after') |
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class LineDiff: |
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""" |
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A LineDiff holds the difference between two strings. |
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""" |
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def __init__(self, change=False, delete=False, add_after=False): |
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""" |
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Creates a new LineDiff object. Note that a line cannot be |
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changed _and_ deleted at the same time. |
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:param change: False or a tuple (original, replacement) |
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:param delete: True/False |
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:param add_after: False or a list of lines to append after this ones |
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""" |
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# change property setter will need this value for assertion |
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self._delete = False |
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self.change = change |
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self.delete = delete |
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self.add_after = add_after |
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def __eq__(self, other): |
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return (self.change == other.change and |
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self.delete == other.delete and |
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self.add_after == other.add_after) |
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@property |
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def change(self): |
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return self._change |
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@change.setter |
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def change(self, value): |
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if value is not False and not isinstance(value, tuple): |
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raise TypeError("change must be False or a tuple with an original " |
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"and a replacement string.") |
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if value is not False and self.delete is not False: |
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raise ConflictError("A line cannot be changed and deleted " |
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"at the same time.") |
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self._change = value |
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@property |
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def delete(self): |
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return self._delete |
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@delete.setter |
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def delete(self, value): |
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if not isinstance(value, bool): |
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raise TypeError("delete can only be a boolean value.") |
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if value is not False and self.change is not False: |
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raise ConflictError("A line cannot be changed and deleted " |
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"at the same time.") |
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self._delete = value |
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@property |
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def add_after(self): |
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return self._add_after |
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@add_after.setter |
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def add_after(self, value): |
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if value is not False and not isinstance(value, collections.Iterable): |
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raise TypeError( |
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"add_after must be False or a list of lines to append.") |
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if isinstance(value, collections.Iterable): |
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value = list(value) |
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self._add_after = value if value != [] else False |
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coala-analyzer /
coala
