242 lines
6.8 KiB
Python
242 lines
6.8 KiB
Python
# vim:fileencoding=utf-8:noet
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from __future__ import (unicode_literals, division, absolute_import, print_function)
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import sys
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import re
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from powerline.lib.encoding import get_preferred_output_encoding
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NON_PRINTABLE_STR = (
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'[^'
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# ASCII control characters: 0x00-0x19
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+ '\t\n' # Tab, newline: allowed ASCII control characters
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+ '\x20-\x7E' # ASCII printable characters
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# Unicode control characters: 0x7F-0x9F
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+ '\u0085' # Allowed unicode control character: next line character
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+ '\u00A0-\uD7FF'
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# Surrogate escapes: 0xD800-0xDFFF
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+ '\uE000-\uFFFD'
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+ ((
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'\uD800-\uDFFF'
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) if sys.maxunicode < 0x10FFFF else (
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'\U00010000-\U0010FFFF'
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))
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+ ']'
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+ ((
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# Paired surrogate escapes: allowed in UCS-2 builds as the only way to
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# represent characters above 0xFFFF. Only paired variant is allowed.
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'|(?<![\uD800-\uDBFF])[\uDC00-\uDFFF]'
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+ '|[\uD800-\uDBFF](?![\uDC00-\uDFFF])'
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) if sys.maxunicode < 0x10FFFF else (
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''
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))
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)
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NON_PRINTABLE_RE = re.compile(NON_PRINTABLE_STR)
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def repl(s):
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return '<x%04x>' % ord(s.group())
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def strtrans(s):
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return NON_PRINTABLE_RE.sub(repl, s.replace('\t', '>---'))
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class Mark:
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def __init__(self, name, line, column, buffer, pointer, old_mark=None, merged_marks=None):
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self.name = name
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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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self.old_mark = old_mark
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self.merged_marks = merged_marks or []
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def copy(self):
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return Mark(self.name, self.line, self.column, self.buffer, self.pointer, self.old_mark, self.merged_marks[:])
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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\n':
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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\n':
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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:self.pointer], self.buffer[self.pointer], self.buffer[self.pointer + 1:end]]
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snippet = [strtrans(s) for s in snippet]
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return (
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' ' * indent + head + ''.join(snippet) + tail + '\n'
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+ ' ' * (indent + len(head) + len(snippet[0])) + '^'
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)
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def advance_string(self, diff):
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ret = self.copy()
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# FIXME Currently does not work properly with escaped strings.
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ret.column += diff
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ret.pointer += diff
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return ret
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def set_old_mark(self, old_mark):
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if self is old_mark:
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return
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checked_marks = set([id(self)])
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older_mark = old_mark
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while True:
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if id(older_mark) in checked_marks:
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raise ValueError('Trying to set recursive marks')
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checked_marks.add(id(older_mark))
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older_mark = older_mark.old_mark
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if not older_mark:
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break
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self.old_mark = old_mark
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def set_merged_mark(self, merged_mark):
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self.merged_marks.append(merged_mark)
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def to_string(self, indent=0, head_text='in ', add_snippet=True):
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mark = self
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where = ''
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processed_marks = set()
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while mark:
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indentstr = ' ' * indent
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where += ('%s %s"%s", line %d, column %d' % (
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indentstr, head_text, mark.name, mark.line + 1, mark.column + 1))
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if add_snippet:
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snippet = mark.get_snippet(indent=(indent + 4))
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if snippet:
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where += ':\n' + snippet
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if mark.merged_marks:
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where += '\n' + indentstr + ' with additionally merged\n'
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where += mark.merged_marks[0].to_string(indent + 4, head_text='', add_snippet=False)
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for mmark in mark.merged_marks[1:]:
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where += '\n' + indentstr + ' and\n'
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where += mmark.to_string(indent + 4, head_text='', add_snippet=False)
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if add_snippet:
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processed_marks.add(id(mark))
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if mark.old_mark:
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where += '\n' + indentstr + ' which replaced value\n'
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indent += 4
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mark = mark.old_mark
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if id(mark) in processed_marks:
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raise ValueError('Trying to dump recursive mark')
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return where
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if sys.version_info < (3,):
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def __str__(self):
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return self.to_string().encode('utf-8')
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def __unicode__(self):
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return self.to_string()
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else:
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def __str__(self):
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return self.to_string()
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def __eq__(self, other):
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return self is other or (
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self.name == other.name
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and self.line == other.line
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and self.column == other.column
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)
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if sys.version_info < (3,):
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def echoerr(**kwargs):
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stream = kwargs.pop('stream', sys.stderr)
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stream.write('\n')
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stream.write((format_error(**kwargs) + '\n').encode(get_preferred_output_encoding()))
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else:
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def echoerr(**kwargs):
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stream = kwargs.pop('stream', sys.stderr)
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stream.write('\n')
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stream.write(format_error(**kwargs) + '\n')
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def format_error(context=None, context_mark=None, problem=None, problem_mark=None, note=None, indent=0):
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lines = []
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indentstr = ' ' * indent
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if context is not None:
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lines.append(indentstr + context)
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if (
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context_mark is not None
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and (
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problem is None or problem_mark is None
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or context_mark != problem_mark
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)
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):
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lines.append(context_mark.to_string(indent=indent))
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if problem is not None:
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lines.append(indentstr + problem)
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if problem_mark is not None:
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lines.append(problem_mark.to_string(indent=indent))
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if note is not None:
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lines.append(indentstr + note)
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return '\n'.join(lines)
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class MarkedError(Exception):
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def __init__(self, context=None, context_mark=None, problem=None, problem_mark=None, note=None):
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Exception.__init__(self, format_error(context, context_mark, problem, problem_mark, note))
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class EchoErr(object):
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__slots__ = ('echoerr', 'logger', 'indent')
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def __init__(self, echoerr, logger, indent=0):
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self.echoerr = echoerr
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self.logger = logger
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self.indent = indent
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def __call__(self, **kwargs):
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kwargs = kwargs.copy()
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kwargs.setdefault('indent', self.indent)
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self.echoerr(**kwargs)
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class DelayedEchoErr(EchoErr):
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__slots__ = ('echoerr', 'logger', 'errs', 'message', 'separator_message', 'indent', 'indent_shift')
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def __init__(self, echoerr, message='', separator_message=''):
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super(DelayedEchoErr, self).__init__(echoerr, echoerr.logger)
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self.errs = [[]]
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self.message = message
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self.separator_message = separator_message
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self.indent_shift = (4 if message or separator_message else 0)
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self.indent = echoerr.indent + self.indent_shift
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def __call__(self, **kwargs):
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kwargs = kwargs.copy()
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kwargs['indent'] = kwargs.get('indent', 0) + self.indent
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self.errs[-1].append(kwargs)
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def next_variant(self):
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self.errs.append([])
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def echo_all(self):
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if self.message:
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self.echoerr(problem=self.message, indent=(self.indent - self.indent_shift))
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for variant in self.errs:
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if not variant:
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continue
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if self.separator_message and variant is not self.errs[0]:
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self.echoerr(problem=self.separator_message, indent=(self.indent - self.indent_shift))
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for kwargs in variant:
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self.echoerr(**kwargs)
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def __nonzero__(self):
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return not not self.errs
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__bool__ = __nonzero__
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