"""
sphinx.util.docutils
~~~~~~~~~~~~~~~~~~~~
Utility functions for docutils.
:copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import os
import re
import types
import warnings
from contextlib import contextmanager
from copy import copy
from distutils.version import LooseVersion
from os import path
from typing import IO, cast
import docutils
from docutils import nodes
from docutils.io import FileOutput
from docutils.parsers.rst import Directive, directives, roles, convert_directive_function
from docutils.statemachine import StateMachine
from docutils.utils import Reporter, unescape
from sphinx.deprecation import RemovedInSphinx30Warning
from sphinx.errors import ExtensionError, SphinxError
from sphinx.locale import __
from sphinx.util import logging
logger = logging.getLogger(__name__)
report_re = re.compile('^(.+?:(?:\\d+)?): \\((DEBUG|INFO|WARNING|ERROR|SEVERE)/(\\d+)?\\) ')
if False:
# For type annotation
from types import ModuleType # NOQA
from typing import Any, Callable, Dict, Generator, List, Set, Tuple, Type # NOQA
from docutils.parsers.rst.states import Inliner # NOQA
from docutils.statemachine import State, StringList # NOQA
from sphinx.builders import Builder # NOQA
from sphinx.config import Config # NOQA
from sphinx.environment import BuildEnvironment # NOQA
from sphinx.util.typing import RoleFunction # NOQA
__version_info__ = tuple(LooseVersion(docutils.__version__).version)
additional_nodes = set() # type: Set[Type[nodes.Element]]
@contextmanager
def docutils_namespace():
# type: () -> Generator[None, None, None]
"""Create namespace for reST parsers."""
try:
_directives = copy(directives._directives) # type: ignore
_roles = copy(roles._roles) # type: ignore
yield
finally:
directives._directives = _directives # type: ignore
roles._roles = _roles # type: ignore
for node in list(additional_nodes):
unregister_node(node)
additional_nodes.discard(node)
def is_directive_registered(name):
# type: (str) -> bool
"""Check the *name* directive is already registered."""
return name in directives._directives # type: ignore
def register_directive(name, directive):
# type: (str, Type[Directive]) -> None
"""Register a directive to docutils.
This modifies global state of docutils. So it is better to use this
inside ``docutils_namespace()`` to prevent side-effects.
"""
directives.register_directive(name, directive)
def is_role_registered(name):
# type: (str) -> bool
"""Check the *name* role is already registered."""
return name in roles._roles # type: ignore
def register_role(name, role):
# type: (str, RoleFunction) -> None
"""Register a role to docutils.
This modifies global state of docutils. So it is better to use this
inside ``docutils_namespace()`` to prevent side-effects.
"""
roles.register_local_role(name, role)
def unregister_role(name):
# type: (str) -> None
"""Unregister a role from docutils."""
roles._roles.pop(name, None) # type: ignore
def is_node_registered(node):
# type: (Type[nodes.Element]) -> bool
"""Check the *node* is already registered."""
return hasattr(nodes.GenericNodeVisitor, 'visit_' + node.__name__)
def register_node(node):
# type: (Type[nodes.Element]) -> None
"""Register a node to docutils.
This modifies global state of some visitors. So it is better to use this
inside ``docutils_namespace()`` to prevent side-effects.
"""
if not hasattr(nodes.GenericNodeVisitor, 'visit_' + node.__name__):
nodes._add_node_class_names([node.__name__]) # type: ignore
additional_nodes.add(node)
def unregister_node(node):
# type: (Type[nodes.Element]) -> None
"""Unregister a node from docutils.
This is inverse of ``nodes._add_nodes_class_names()``.
"""
if hasattr(nodes.GenericNodeVisitor, 'visit_' + node.__name__):
delattr(nodes.GenericNodeVisitor, "visit_" + node.__name__)
delattr(nodes.GenericNodeVisitor, "depart_" + node.__name__)
delattr(nodes.SparseNodeVisitor, 'visit_' + node.__name__)
delattr(nodes.SparseNodeVisitor, 'depart_' + node.__name__)
@contextmanager
def patched_get_language():
# type: () -> Generator[None, None, None]
"""Patch docutils.languages.get_language() temporarily.
This ignores the second argument ``reporter`` to suppress warnings.
refs: https://github.com/sphinx-doc/sphinx/issues/3788
"""
from docutils.languages import get_language
def patched_get_language(language_code, reporter=None):
# type: (str, Reporter) -> Any
return get_language(language_code)
try:
docutils.languages.get_language = patched_get_language
yield
finally:
# restore original implementations
docutils.languages.get_language = get_language
@contextmanager
def using_user_docutils_conf(confdir):
# type: (str) -> Generator[None, None, None]
"""Let docutils know the location of ``docutils.conf`` for Sphinx."""
try:
docutilsconfig = os.environ.get('DOCUTILSCONFIG', None)
if confdir:
os.environ['DOCUTILSCONFIG'] = path.join(path.abspath(confdir), 'docutils.conf')
yield
finally:
if docutilsconfig is None:
os.environ.pop('DOCUTILSCONFIG', None)
else:
os.environ['DOCUTILSCONFIG'] = docutilsconfig
@contextmanager
def patch_docutils(confdir=None):
# type: (str) -> Generator[None, None, None]
"""Patch to docutils temporarily."""
with patched_get_language(), using_user_docutils_conf(confdir):
yield
class ElementLookupError(Exception):
pass
class sphinx_domains:
"""Monkey-patch directive and role dispatch, so that domain-specific
markup takes precedence.
"""
def __init__(self, env):
# type: (BuildEnvironment) -> None
self.env = env
self.directive_func = None # type: Callable
self.roles_func = None # type: Callable
def __enter__(self):
# type: () -> None
self.enable()
def __exit__(self, type, value, traceback):
# type: (str, str, str) -> None
self.disable()
def enable(self):
# type: () -> None
self.directive_func = directives.directive
self.role_func = roles.role
directives.directive = self.lookup_directive # type: ignore
roles.role = self.lookup_role # type: ignore
def disable(self):
# type: () -> None
directives.directive = self.directive_func
roles.role = self.role_func
def lookup_domain_element(self, type, name):
# type: (str, str) -> Any
"""Lookup a markup element (directive or role), given its name which can
be a full name (with domain).
"""
name = name.lower()
# explicit domain given?
if ':' in name:
domain_name, name = name.split(':', 1)
if domain_name in self.env.domains:
domain = self.env.get_domain(domain_name)
element = getattr(domain, type)(name)
if element is not None:
return element, []
# else look in the default domain
else:
def_domain = self.env.temp_data.get('default_domain')
if def_domain is not None:
element = getattr(def_domain, type)(name)
if element is not None:
return element, []
# always look in the std domain
element = getattr(self.env.get_domain('std'), type)(name)
if element is not None:
return element, []
raise ElementLookupError
def lookup_directive(self, name, lang_module, document):
# type: (str, ModuleType, nodes.document) -> Tuple[Type[Directive], List[nodes.system_message]] # NOQA
try:
return self.lookup_domain_element('directive', name)
except ElementLookupError:
return self.directive_func(name, lang_module, document)
def lookup_role(self, name, lang_module, lineno, reporter):
# type: (str, ModuleType, int, Reporter) -> Tuple[RoleFunction, List[nodes.system_message]] # NOQA
try:
return self.lookup_domain_element('role', name)
except ElementLookupError:
return self.role_func(name, lang_module, lineno, reporter)
class WarningStream:
def write(self, text):
# type: (str) -> None
matched = report_re.search(text)
if not matched:
logger.warning(text.rstrip("\r\n"))
else:
location, type, level = matched.groups()
message = report_re.sub('', text).rstrip()
logger.log(type, message, location=location)
class LoggingReporter(Reporter):
@classmethod
def from_reporter(cls, reporter):
# type: (Reporter) -> LoggingReporter
"""Create an instance of LoggingReporter from other reporter object."""
return cls(reporter.source, reporter.report_level, reporter.halt_level,
reporter.debug_flag, reporter.error_handler)
def __init__(self, source, report_level=Reporter.WARNING_LEVEL,
halt_level=Reporter.SEVERE_LEVEL, debug=False,
error_handler='backslashreplace'):
# type: (str, int, int, bool, str) -> None
stream = cast(IO, WarningStream())
super().__init__(source, report_level, halt_level,
stream, debug, error_handler=error_handler)
class NullReporter(Reporter):
"""A dummy reporter; write nothing."""
def __init__(self):
# type: () -> None
super().__init__('', 999, 4)
def is_html5_writer_available():
# type: () -> bool
return __version_info__ > (0, 13, 0)
def directive_helper(obj, has_content=None, argument_spec=None, **option_spec):
# type: (Any, bool, Tuple[int, int, bool], Any) -> Any
warnings.warn('function based directive support is now deprecated. '
'Use class based directive instead.',
RemovedInSphinx30Warning)
if isinstance(obj, (types.FunctionType, types.MethodType)):
obj.content = has_content # type: ignore
obj.arguments = argument_spec or (0, 0, False) # type: ignore
obj.options = option_spec # type: ignore
return convert_directive_function(obj)
else:
if has_content or argument_spec or option_spec:
raise ExtensionError(__('when adding directive classes, no '
'additional arguments may be given'))
return obj
@contextmanager
def switch_source_input(state, content):
# type: (State, StringList) -> Generator[None, None, None]
"""Switch current source input of state temporarily."""
try:
# remember the original ``get_source_and_line()`` method
get_source_and_line = state.memo.reporter.get_source_and_line # type: ignore
# replace it by new one
state_machine = StateMachine([], None)
state_machine.input_lines = content
state.memo.reporter.get_source_and_line = state_machine.get_source_and_line # type: ignore # NOQA
yield
finally:
# restore the method
state.memo.reporter.get_source_and_line = get_source_and_line # type: ignore
class SphinxFileOutput(FileOutput):
"""Better FileOutput class for Sphinx."""
def __init__(self, **kwargs):
# type: (Any) -> None
self.overwrite_if_changed = kwargs.pop('overwrite_if_changed', False)
super().__init__(**kwargs)
def write(self, data):
# type: (str) -> str
if (self.destination_path and self.autoclose and 'b' not in self.mode and
self.overwrite_if_changed and os.path.exists(self.destination_path)):
with open(self.destination_path, encoding=self.encoding) as f:
# skip writing: content not changed
if f.read() == data:
return data
return super().write(data)
[文档]class SphinxDirective(Directive):
"""A base class for Sphinx directives.
This class provides helper methods for Sphinx directives.
.. note:: The subclasses of this class might not work with docutils.
This class is strongly coupled with Sphinx.
"""
@property
def env(self):
# type: () -> BuildEnvironment
"""Reference to the :class:`.BuildEnvironment` object."""
return self.state.document.settings.env
@property
def config(self):
# type: () -> Config
"""Reference to the :class:`.Config` object."""
return self.env.config
[文档] def set_source_info(self, node):
# type: (nodes.Node) -> None
"""Set source and line number to the node."""
node.source, node.line = self.state_machine.get_source_and_line(self.lineno)
[文档]class SphinxRole:
"""A base class for Sphinx roles.
This class provides helper methods for Sphinx roles.
.. note:: The subclasses of this class might not work with docutils.
This class is strongly coupled with Sphinx.
"""
name = None #: The role name actually used in the document.
rawtext = None #: A string containing the entire interpreted text input.
text = None #: The interpreted text content.
lineno = None #: The line number where the interpreted text begins.
inliner = None #: The ``docutils.parsers.rst.states.Inliner`` object.
options = None #: A dictionary of directive options for customization
#: (from the "role" directive).
content = None #: A list of strings, the directive content for customization
#: (from the "role" directive).
def __call__(self, name, rawtext, text, lineno, inliner, options={}, content=[]):
# type: (str, str, str, int, Inliner, Dict, List[str]) -> Tuple[List[nodes.Node], List[nodes.system_message]] # NOQA
self.rawtext = rawtext
self.text = unescape(text)
self.lineno = lineno
self.inliner = inliner
self.options = options
self.content = content
# guess role type
if name:
self.name = name.lower()
else:
self.name = self.env.temp_data.get('default_role')
if not self.name:
self.name = self.env.config.default_role
if not self.name:
raise SphinxError('cannot determine default role!')
return self.run()
def run(self):
# type: () -> Tuple[List[nodes.Node], List[nodes.system_message]]
raise NotImplementedError
@property
def env(self):
# type: () -> BuildEnvironment
"""Reference to the :class:`.BuildEnvironment` object."""
return self.inliner.document.settings.env
@property
def config(self):
# type: () -> Config
"""Reference to the :class:`.Config` object."""
return self.env.config
def set_source_info(self, node, lineno=None):
# type: (nodes.Node, int) -> None
if lineno is None:
lineno = self.lineno
source_info = self.inliner.reporter.get_source_and_line(lineno) # type: ignore
node.source, node.line = source_info
[文档]class ReferenceRole(SphinxRole):
"""A base class for reference roles.
The reference roles can accpet ``link title <target>`` style as a text for
the role. The parsed result; link title and target will be stored to
``self.title`` and ``self.target``.
"""
has_explicit_title = None #: A boolean indicates the role has explicit title or not.
title = None #: The link title for the interpreted text.
target = None #: The link target for the interpreted text.
# \x00 means the "<" was backslash-escaped
explicit_title_re = re.compile(r'^(.+?)\s*(?<!\x00)<(.*?)>$', re.DOTALL)
def __call__(self, name, rawtext, text, lineno, inliner, options={}, content=[]):
# type: (str, str, str, int, Inliner, Dict, List[str]) -> Tuple[List[nodes.Node], List[nodes.system_message]] # NOQA
matched = self.explicit_title_re.match(text)
if matched:
self.has_explicit_title = True
self.title = unescape(matched.group(1))
self.target = unescape(matched.group(2))
else:
self.has_explicit_title = False
self.title = unescape(text)
self.target = unescape(text)
return super().__call__(name, rawtext, text, lineno, inliner, options, content)
class SphinxTranslator(nodes.NodeVisitor):
"""A base class for Sphinx translators.
This class provides helper methods for Sphinx translators.
.. note:: The subclasses of this class might not work with docutils.
This class is strongly coupled with Sphinx.
"""
def __init__(self, document, builder):
# type: (nodes.document, Builder) -> None
super().__init__(document)
self.builder = builder
self.config = builder.config
self.settings = document.settings
# cache a vanilla instance of nodes.document
# Used in new_document() function
__document_cache__ = None # type: nodes.document
def new_document(source_path, settings=None):
# type: (str, Any) -> nodes.document
"""Return a new empty document object. This is an alternative of docutils'.
This is a simple wrapper for ``docutils.utils.new_document()``. It
caches the result of docutils' and use it on second call for instanciation.
This makes an instantiation of document nodes much faster.
"""
global __document_cache__
if __document_cache__ is None:
__document_cache__ = docutils.utils.new_document(source_path)
if settings is None:
# Make a copy of ``settings`` from cache to accelerate instansiation
settings = copy(__document_cache__.settings)
# Create a new instance of nodes.document using cached reporter
document = nodes.document(settings, __document_cache__.reporter, source=source_path)
document.note_source(source_path, -1)
return document
