76 lines
2.5 KiB
Python
76 lines
2.5 KiB
Python
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__all__ = ['Mark', 'YAMLError', 'MarkedYAMLError']
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class Mark:
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def __init__(self, name, index, line, column, buffer, pointer):
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self.name = name
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self.index = index
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self.line = line
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self.column = column
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self.buffer = buffer
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self.pointer = pointer
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def get_snippet(self, indent=4, max_length=75):
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if self.buffer is None:
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return None
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head = ''
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start = self.pointer
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while start > 0 and self.buffer[start-1] not in '\0\r\n\x85\u2028\u2029':
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start -= 1
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if self.pointer-start > max_length/2-1:
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head = ' ... '
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start += 5
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break
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tail = ''
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end = self.pointer
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while end < len(self.buffer) and self.buffer[end] not in '\0\r\n\x85\u2028\u2029':
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end += 1
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if end-self.pointer > max_length/2-1:
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tail = ' ... '
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end -= 5
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break
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snippet = self.buffer[start:end]
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return ' '*indent + head + snippet + tail + '\n' \
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+ ' '*(indent+self.pointer-start+len(head)) + '^'
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def __str__(self):
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snippet = self.get_snippet()
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where = " in \"%s\", line %d, column %d" \
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% (self.name, self.line+1, self.column+1)
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if snippet is not None:
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where += ":\n"+snippet
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return where
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class YAMLError(Exception):
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pass
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class MarkedYAMLError(YAMLError):
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def __init__(self, context=None, context_mark=None,
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problem=None, problem_mark=None, note=None):
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self.context = context
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self.context_mark = context_mark
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self.problem = problem
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self.problem_mark = problem_mark
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self.note = note
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def __str__(self):
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lines = []
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if self.context is not None:
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lines.append(self.context)
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if self.context_mark is not None \
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and (self.problem is None or self.problem_mark is None
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or self.context_mark.name != self.problem_mark.name
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or self.context_mark.line != self.problem_mark.line
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or self.context_mark.column != self.problem_mark.column):
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lines.append(str(self.context_mark))
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if self.problem is not None:
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lines.append(self.problem)
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if self.problem_mark is not None:
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lines.append(str(self.problem_mark))
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if self.note is not None:
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lines.append(self.note)
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return '\n'.join(lines)
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