in functions/source/syncEditStackFacts/ruamel/yaml/emitter.py [0:0]
def analyze_scalar(self, scalar):
# type: (Any) -> Any
# Empty scalar is a special case.
if not scalar:
return ScalarAnalysis(
scalar=scalar,
empty=True,
multiline=False,
allow_flow_plain=False,
allow_block_plain=True,
allow_single_quoted=True,
allow_double_quoted=True,
allow_block=False,
)
# Indicators and special characters.
block_indicators = False
flow_indicators = False
line_breaks = False
special_characters = False
# Important whitespace combinations.
leading_space = False
leading_break = False
trailing_space = False
trailing_break = False
break_space = False
space_break = False
# Check document indicators.
if scalar.startswith(u'---') or scalar.startswith(u'...'):
block_indicators = True
flow_indicators = True
# First character or preceded by a whitespace.
preceeded_by_whitespace = True
# Last character or followed by a whitespace.
followed_by_whitespace = len(scalar) == 1 or scalar[1] in u'\0 \t\r\n\x85\u2028\u2029'
# The previous character is a space.
previous_space = False
# The previous character is a break.
previous_break = False
index = 0
while index < len(scalar):
ch = scalar[index]
# Check for indicators.
if index == 0:
# Leading indicators are special characters.
if ch in u'#,[]{}&*!|>\'"%@`':
flow_indicators = True
block_indicators = True
if ch in u'?:': # ToDo
if self.serializer.use_version == (1, 1):
flow_indicators = True
elif len(scalar) == 1: # single character
flow_indicators = True
if followed_by_whitespace:
block_indicators = True
if ch == u'-' and followed_by_whitespace:
flow_indicators = True
block_indicators = True
else:
# Some indicators cannot appear within a scalar as well.
if ch in u',[]{}': # http://yaml.org/spec/1.2/spec.html#id2788859
flow_indicators = True
if ch == u'?' and self.serializer.use_version == (1, 1):
flow_indicators = True
if ch == u':':
if followed_by_whitespace:
flow_indicators = True
block_indicators = True
if ch == u'#' and preceeded_by_whitespace:
flow_indicators = True
block_indicators = True
# Check for line breaks, special, and unicode characters.
if ch in u'\n\x85\u2028\u2029':
line_breaks = True
if not (ch == u'\n' or u'\x20' <= ch <= u'\x7E'):
if (
ch == u'\x85'
or u'\xA0' <= ch <= u'\uD7FF'
or u'\uE000' <= ch <= u'\uFFFD'
or (self.unicode_supplementary and (u'\U00010000' <= ch <= u'\U0010FFFF'))
) and ch != u'\uFEFF':
# unicode_characters = True
if not self.allow_unicode:
special_characters = True
else:
special_characters = True
# Detect important whitespace combinations.
if ch == u' ':
if index == 0:
leading_space = True
if index == len(scalar) - 1:
trailing_space = True
if previous_break:
break_space = True
previous_space = True
previous_break = False
elif ch in u'\n\x85\u2028\u2029':
if index == 0:
leading_break = True
if index == len(scalar) - 1:
trailing_break = True
if previous_space:
space_break = True
previous_space = False
previous_break = True
else:
previous_space = False
previous_break = False
# Prepare for the next character.
index += 1
preceeded_by_whitespace = ch in u'\0 \t\r\n\x85\u2028\u2029'
followed_by_whitespace = (
index + 1 >= len(scalar) or scalar[index + 1] in u'\0 \t\r\n\x85\u2028\u2029'
)
# Let's decide what styles are allowed.
allow_flow_plain = True
allow_block_plain = True
allow_single_quoted = True
allow_double_quoted = True
allow_block = True
# Leading and trailing whitespaces are bad for plain scalars.
if leading_space or leading_break or trailing_space or trailing_break:
allow_flow_plain = allow_block_plain = False
# We do not permit trailing spaces for block scalars.
if trailing_space:
allow_block = False
# Spaces at the beginning of a new line are only acceptable for block
# scalars.
if break_space:
allow_flow_plain = allow_block_plain = allow_single_quoted = False
# Spaces followed by breaks, as well as special character are only
# allowed for double quoted scalars.
if special_characters:
allow_flow_plain = allow_block_plain = allow_single_quoted = allow_block = False
elif space_break:
allow_flow_plain = allow_block_plain = allow_single_quoted = False
if not self.allow_space_break:
allow_block = False
# Although the plain scalar writer supports breaks, we never emit
# multiline plain scalars.
if line_breaks:
allow_flow_plain = allow_block_plain = False
# Flow indicators are forbidden for flow plain scalars.
if flow_indicators:
allow_flow_plain = False
# Block indicators are forbidden for block plain scalars.
if block_indicators:
allow_block_plain = False
return ScalarAnalysis(
scalar=scalar,
empty=False,
multiline=line_breaks,
allow_flow_plain=allow_flow_plain,
allow_block_plain=allow_block_plain,
allow_single_quoted=allow_single_quoted,
allow_double_quoted=allow_double_quoted,
allow_block=allow_block,
)