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# coding: utf-8
from __future__ import print_function, absolute_import, division, unicode_literals
from ruamel.yaml.compat import text_type
if False: # MYPY
from typing import Text, Any, Dict, List # NOQA
__all__ = [
'ScalarString',
'LiteralScalarString',
'FoldedScalarString',
'SingleQuotedScalarString',
'DoubleQuotedScalarString',
'PreservedScalarString',
]
class ScalarString(text_type):
__slots__ = ()
def __new__(cls, *args, **kw):
# type: (Any, Any) -> Any
return text_type.__new__(cls, *args, **kw) # type: ignore
def replace(self, old, new, maxreplace=-1):
# type: (Any, Any, int) -> Any
return type(self)((text_type.replace(self, old, new, maxreplace)))
class LiteralScalarString(ScalarString):
__slots__ = 'comment' # the comment after the | on the first line
style = '|'
def __new__(cls, value):
# type: (Text) -> Any
return ScalarString.__new__(cls, value)
PreservedScalarString = LiteralScalarString
class FoldedScalarString(ScalarString):
__slots__ = ('fold_pos', 'comment') # the comment after the > on the first line
style = '>'
def __new__(cls, value):
# type: (Text) -> Any
return ScalarString.__new__(cls, value)
class SingleQuotedScalarString(ScalarString):
__slots__ = ()
style = "'"
def __new__(cls, value):
# type: (Text) -> Any
return ScalarString.__new__(cls, value)
class DoubleQuotedScalarString(ScalarString):
__slots__ = ()
style = '"'
def __new__(cls, value):
# type: (Text) -> Any
return ScalarString.__new__(cls, value)
def preserve_literal(s):
# type: (Text) -> Text
return LiteralScalarString(s.replace('\r\n', '\n').replace('\r', '\n'))
def walk_tree(base, map=None):
# type: (Any, Any) -> None
"""
the routine here walks over a simple yaml tree (recursing in
dict values and list items) and converts strings that
have multiple lines to literal scalars
You can also provide an explicit (ordered) mapping for multiple transforms
(first of which is executed):
map = ruamel.yaml.compat.ordereddict
map['\n'] = preserve_literal
map[':'] = SingleQuotedScalarString
walk_tree(data, map=map)
"""
from ruamel.yaml.compat import string_types, MutableMapping, MutableSequence
if map is None:
map = {'\n': preserve_literal}
if isinstance(base, MutableMapping):
for k in base:
v = base[k] # type: Text
if isinstance(v, string_types):
for ch in map:
if ch in v:
base[k] = map[ch](v)
break
else:
walk_tree(v)
elif isinstance(base, MutableSequence):
for idx, elem in enumerate(base):
if isinstance(elem, string_types):
for ch in map:
if ch in elem: # type: ignore
base[idx] = map[ch](elem)
break
else:
walk_tree(elem)
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