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# # header
# coding: utf-8
class Token(object):
def __init__(self, start_mark, end_mark):
self.start_mark = start_mark
self.end_mark = end_mark
def __repr__(self):
attributes = [key for key in self.__dict__
if not key.endswith('_mark')]
attributes.sort()
arguments = ', '.join(['%s=%r' % (key, getattr(self, key))
for key in attributes])
return '%s(%s)' % (self.__class__.__name__, arguments)
def add_post_comment(self, comment):
if not hasattr(self, '_comment'):
self._comment = [None, None]
self._comment[0] = comment
def add_pre_comments(self, comments):
if not hasattr(self, '_comment'):
self._comment = [None, None]
assert self._comment[1] is None
self._comment[1] = comments
def get_comment(self):
return getattr(self, '_comment', None)
@property
def comment(self):
return getattr(self, '_comment', None)
def move_comment(self, target):
"""move a comment from this token to target (normally next token)
used to combine e.g. comments before a BlockEntryToken to the
ScalarToken that follows it
"""
c = self.comment
if c is None:
return
# don't push beyond last element
if isinstance(target, StreamEndToken):
return
delattr(self, '_comment')
tc = target.comment
if not tc: # target comment, just insert
target._comment = c
return self
if c[0] and tc[0] or c[1] and tc[1]:
raise NotImplementedError('overlap in comment %r %r' % c, tc)
if c[0]:
tc[0] = c[0]
if c[1]:
tc[1] = c[1]
return self
def split_comment(self):
""" split the post part of a comment, and return it
as comment to be added. Delete second part if [None, None]
abc: # this goes to sequence
# this goes to first element
- first element
"""
comment = self.comment
if comment is None or comment[0] is None:
return None # nothing to do
ret_val = [comment[0], None]
if comment[1] is None:
delattr(self, '_comment')
return ret_val
# class BOMToken(Token):
# id = '<byte order mark>'
class DirectiveToken(Token):
id = '<directive>'
def __init__(self, name, value, start_mark, end_mark):
Token.__init__(self, start_mark, end_mark)
self.name = name
self.value = value
class DocumentStartToken(Token):
id = '<document start>'
class DocumentEndToken(Token):
id = '<document end>'
class StreamStartToken(Token):
id = '<stream start>'
def __init__(self, start_mark=None, end_mark=None, encoding=None):
Token.__init__(self, start_mark, end_mark)
self.encoding = encoding
class StreamEndToken(Token):
id = '<stream end>'
class BlockSequenceStartToken(Token):
id = '<block sequence start>'
class BlockMappingStartToken(Token):
id = '<block mapping start>'
class BlockEndToken(Token):
id = '<block end>'
class FlowSequenceStartToken(Token):
id = '['
class FlowMappingStartToken(Token):
id = '{'
class FlowSequenceEndToken(Token):
id = ']'
class FlowMappingEndToken(Token):
id = '}'
class KeyToken(Token):
id = '?'
class ValueToken(Token):
id = ':'
class BlockEntryToken(Token):
id = '-'
class FlowEntryToken(Token):
id = ','
class AliasToken(Token):
id = '<alias>'
def __init__(self, value, start_mark, end_mark):
Token.__init__(self, start_mark, end_mark)
self.value = value
class AnchorToken(Token):
id = '<anchor>'
def __init__(self, value, start_mark, end_mark):
Token.__init__(self, start_mark, end_mark)
self.value = value
class TagToken(Token):
id = '<tag>'
def __init__(self, value, start_mark, end_mark):
Token.__init__(self, start_mark, end_mark)
self.value = value
class ScalarToken(Token):
id = '<scalar>'
def __init__(self, value, plain, start_mark, end_mark, style=None):
Token.__init__(self, start_mark, end_mark)
self.value = value
self.plain = plain
self.style = style
class CommentToken(Token):
id = '<comment>'
def __init__(self, value, start_mark, end_mark):
Token.__init__(self, start_mark, end_mark)
self.value = value
def reset(self):
if hasattr(self, 'pre_done'):
delattr(self, 'pre_done')
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