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|
"""
sphinx.domains.python
~~~~~~~~~~~~~~~~~~~~~
The Python domain.
:copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import builtins
import inspect
import re
import sys
import typing
import warnings
from inspect import Parameter
from typing import Any, Dict, Iterable, Iterator, List, NamedTuple, Tuple, Type, cast
from docutils import nodes
from docutils.nodes import Element, Node
from docutils.parsers.rst import directives
from sphinx import addnodes
from sphinx.addnodes import desc_signature, pending_xref, pending_xref_condition
from sphinx.application import Sphinx
from sphinx.builders import Builder
from sphinx.deprecation import RemovedInSphinx50Warning
from sphinx.directives import ObjectDescription
from sphinx.domains import Domain, Index, IndexEntry, ObjType
from sphinx.environment import BuildEnvironment
from sphinx.locale import _, __
from sphinx.pycode.ast import ast
from sphinx.pycode.ast import parse as ast_parse
from sphinx.roles import XRefRole
from sphinx.util import logging
from sphinx.util.docfields import Field, GroupedField, TypedField
from sphinx.util.docutils import SphinxDirective
from sphinx.util.inspect import signature_from_str
from sphinx.util.nodes import find_pending_xref_condition, make_id, make_refnode
from sphinx.util.typing import OptionSpec, TextlikeNode
logger = logging.getLogger(__name__)
# REs for Python signatures
py_sig_re = re.compile(
r'''^ ([\w.]*\.)? # class name(s)
(\w+) \s* # thing name
(?: \(\s*(.*)\s*\) # optional: arguments
(?:\s* -> \s* (.*))? # return annotation
)? $ # and nothing more
''', re.VERBOSE)
pairindextypes = {
'module': _('module'),
'keyword': _('keyword'),
'operator': _('operator'),
'object': _('object'),
'exception': _('exception'),
'statement': _('statement'),
'builtin': _('built-in function'),
}
class ObjectEntry(NamedTuple):
docname: str
node_id: str
objtype: str
canonical: bool
class ModuleEntry(NamedTuple):
docname: str
node_id: str
synopsis: str
platform: str
deprecated: bool
def type_to_xref(text: str, env: BuildEnvironment = None) -> addnodes.pending_xref:
"""Convert a type string to a cross reference node."""
if text == 'None':
reftype = 'obj'
else:
reftype = 'class'
if env:
kwargs = {'py:module': env.ref_context.get('py:module'),
'py:class': env.ref_context.get('py:class')}
else:
kwargs = {}
if env.config.python_use_unqualified_type_names:
# Note: It would be better to use qualname to describe the object to support support
# nested classes. But python domain can't access the real python object because this
# module should work not-dynamically.
shortname = text.split('.')[-1]
contnodes = [pending_xref_condition('', shortname, condition='resolved'),
pending_xref_condition('', text, condition='*')] # type: List[Node]
else:
contnodes = [nodes.Text(text)]
return pending_xref('', *contnodes,
refdomain='py', reftype=reftype, reftarget=text, **kwargs)
def _parse_annotation(annotation: str, env: BuildEnvironment = None) -> List[Node]:
"""Parse type annotation."""
def unparse(node: ast.AST) -> List[Node]:
if isinstance(node, ast.Attribute):
return [nodes.Text("%s.%s" % (unparse(node.value)[0], node.attr))]
elif isinstance(node, ast.BinOp):
result = unparse(node.left) # type: List[Node]
result.extend(unparse(node.op))
result.extend(unparse(node.right))
return result
elif isinstance(node, ast.BitOr):
return [nodes.Text(' '), addnodes.desc_sig_punctuation('', '|'), nodes.Text(' ')]
elif isinstance(node, ast.Constant): # type: ignore
if node.value is Ellipsis:
return [addnodes.desc_sig_punctuation('', "...")]
else:
return [nodes.Text(node.value)]
elif isinstance(node, ast.Expr):
return unparse(node.value)
elif isinstance(node, ast.Index):
return unparse(node.value)
elif isinstance(node, ast.List):
result = [addnodes.desc_sig_punctuation('', '[')]
for elem in node.elts:
result.extend(unparse(elem))
result.append(addnodes.desc_sig_punctuation('', ', '))
result.pop()
result.append(addnodes.desc_sig_punctuation('', ']'))
return result
elif isinstance(node, ast.Module):
return sum((unparse(e) for e in node.body), [])
elif isinstance(node, ast.Name):
return [nodes.Text(node.id)]
elif isinstance(node, ast.Subscript):
result = unparse(node.value)
result.append(addnodes.desc_sig_punctuation('', '['))
result.extend(unparse(node.slice))
result.append(addnodes.desc_sig_punctuation('', ']'))
return result
elif isinstance(node, ast.Tuple):
if node.elts:
result = []
for elem in node.elts:
result.extend(unparse(elem))
result.append(addnodes.desc_sig_punctuation('', ', '))
result.pop()
else:
result = [addnodes.desc_sig_punctuation('', '('),
addnodes.desc_sig_punctuation('', ')')]
return result
else:
if sys.version_info < (3, 8):
if isinstance(node, ast.Ellipsis):
return [addnodes.desc_sig_punctuation('', "...")]
elif isinstance(node, ast.NameConstant):
return [nodes.Text(node.value)]
raise SyntaxError # unsupported syntax
if env is None:
warnings.warn("The env parameter for _parse_annotation becomes required now.",
RemovedInSphinx50Warning, stacklevel=2)
try:
tree = ast_parse(annotation)
result = unparse(tree)
for i, node in enumerate(result):
if isinstance(node, nodes.Text) and node.strip():
result[i] = type_to_xref(str(node), env)
return result
except SyntaxError:
return [type_to_xref(annotation, env)]
def _parse_arglist(arglist: str, env: BuildEnvironment = None) -> addnodes.desc_parameterlist:
"""Parse a list of arguments using AST parser"""
params = addnodes.desc_parameterlist(arglist)
sig = signature_from_str('(%s)' % arglist)
last_kind = None
for param in sig.parameters.values():
if param.kind != param.POSITIONAL_ONLY and last_kind == param.POSITIONAL_ONLY:
# PEP-570: Separator for Positional Only Parameter: /
params += addnodes.desc_parameter('', '', addnodes.desc_sig_operator('', '/'))
if param.kind == param.KEYWORD_ONLY and last_kind in (param.POSITIONAL_OR_KEYWORD,
param.POSITIONAL_ONLY,
None):
# PEP-3102: Separator for Keyword Only Parameter: *
params += addnodes.desc_parameter('', '', addnodes.desc_sig_operator('', '*'))
node = addnodes.desc_parameter()
if param.kind == param.VAR_POSITIONAL:
node += addnodes.desc_sig_operator('', '*')
node += addnodes.desc_sig_name('', param.name)
elif param.kind == param.VAR_KEYWORD:
node += addnodes.desc_sig_operator('', '**')
node += addnodes.desc_sig_name('', param.name)
else:
node += addnodes.desc_sig_name('', param.name)
if param.annotation is not param.empty:
children = _parse_annotation(param.annotation, env)
node += addnodes.desc_sig_punctuation('', ':')
node += nodes.Text(' ')
node += addnodes.desc_sig_name('', '', *children) # type: ignore
if param.default is not param.empty:
if param.annotation is not param.empty:
node += nodes.Text(' ')
node += addnodes.desc_sig_operator('', '=')
node += nodes.Text(' ')
else:
node += addnodes.desc_sig_operator('', '=')
node += nodes.inline('', param.default, classes=['default_value'],
support_smartquotes=False)
params += node
last_kind = param.kind
if last_kind == Parameter.POSITIONAL_ONLY:
# PEP-570: Separator for Positional Only Parameter: /
params += addnodes.desc_parameter('', '', addnodes.desc_sig_operator('', '/'))
return params
def _pseudo_parse_arglist(signode: desc_signature, arglist: str) -> None:
""""Parse" a list of arguments separated by commas.
Arguments can have "optional" annotations given by enclosing them in
brackets. Currently, this will split at any comma, even if it's inside a
string literal (e.g. default argument value).
"""
paramlist = addnodes.desc_parameterlist()
stack = [paramlist] # type: List[Element]
try:
for argument in arglist.split(','):
argument = argument.strip()
ends_open = ends_close = 0
while argument.startswith('['):
stack.append(addnodes.desc_optional())
stack[-2] += stack[-1]
argument = argument[1:].strip()
while argument.startswith(']'):
stack.pop()
argument = argument[1:].strip()
while argument.endswith(']') and not argument.endswith('[]'):
ends_close += 1
argument = argument[:-1].strip()
while argument.endswith('['):
ends_open += 1
argument = argument[:-1].strip()
if argument:
stack[-1] += addnodes.desc_parameter(argument, argument)
while ends_open:
stack.append(addnodes.desc_optional())
stack[-2] += stack[-1]
ends_open -= 1
while ends_close:
stack.pop()
ends_close -= 1
if len(stack) != 1:
raise IndexError
except IndexError:
# if there are too few or too many elements on the stack, just give up
# and treat the whole argument list as one argument, discarding the
# already partially populated paramlist node
paramlist = addnodes.desc_parameterlist()
paramlist += addnodes.desc_parameter(arglist, arglist)
signode += paramlist
else:
signode += paramlist
# This override allows our inline type specifiers to behave like :class: link
# when it comes to handling "." and "~" prefixes.
class PyXrefMixin:
def make_xref(self, rolename: str, domain: str, target: str,
innernode: Type[TextlikeNode] = nodes.emphasis,
contnode: Node = None, env: BuildEnvironment = None) -> Node:
result = super().make_xref(rolename, domain, target, # type: ignore
innernode, contnode, env)
result['refspecific'] = True
result['py:module'] = env.ref_context.get('py:module')
result['py:class'] = env.ref_context.get('py:class')
if target.startswith(('.', '~')):
prefix, result['reftarget'] = target[0], target[1:]
if prefix == '.':
text = target[1:]
elif prefix == '~':
text = target.split('.')[-1]
for node in result.traverse(nodes.Text):
node.parent[node.parent.index(node)] = nodes.Text(text)
break
return result
def make_xrefs(self, rolename: str, domain: str, target: str,
innernode: Type[TextlikeNode] = nodes.emphasis,
contnode: Node = None, env: BuildEnvironment = None) -> List[Node]:
delims = r'(\s*[\[\]\(\),](?:\s*or\s)?\s*|\s+or\s+)'
delims_re = re.compile(delims)
sub_targets = re.split(delims, target)
split_contnode = bool(contnode and contnode.astext() == target)
results = []
for sub_target in filter(None, sub_targets):
if split_contnode:
contnode = nodes.Text(sub_target)
if delims_re.match(sub_target):
results.append(contnode or innernode(sub_target, sub_target))
else:
results.append(self.make_xref(rolename, domain, sub_target,
innernode, contnode, env))
return results
class PyField(PyXrefMixin, Field):
def make_xref(self, rolename: str, domain: str, target: str,
innernode: Type[TextlikeNode] = nodes.emphasis,
contnode: Node = None, env: BuildEnvironment = None) -> Node:
if rolename == 'class' and target == 'None':
# None is not a type, so use obj role instead.
rolename = 'obj'
return super().make_xref(rolename, domain, target, innernode, contnode, env)
class PyGroupedField(PyXrefMixin, GroupedField):
pass
class PyTypedField(PyXrefMixin, TypedField):
def make_xref(self, rolename: str, domain: str, target: str,
innernode: Type[TextlikeNode] = nodes.emphasis,
contnode: Node = None, env: BuildEnvironment = None) -> Node:
if rolename == 'class' and target == 'None':
# None is not a type, so use obj role instead.
rolename = 'obj'
return super().make_xref(rolename, domain, target, innernode, contnode, env)
class PyObject(ObjectDescription[Tuple[str, str]]):
"""
Description of a general Python object.
:cvar allow_nesting: Class is an object that allows for nested namespaces
:vartype allow_nesting: bool
"""
option_spec: OptionSpec = {
'noindex': directives.flag,
'noindexentry': directives.flag,
'module': directives.unchanged,
'canonical': directives.unchanged,
'annotation': directives.unchanged,
}
doc_field_types = [
PyTypedField('parameter', label=_('Parameters'),
names=('param', 'parameter', 'arg', 'argument',
'keyword', 'kwarg', 'kwparam'),
typerolename='class', typenames=('paramtype', 'type'),
can_collapse=True),
PyTypedField('variable', label=_('Variables'),
names=('var', 'ivar', 'cvar'),
typerolename='class', typenames=('vartype',),
can_collapse=True),
PyGroupedField('exceptions', label=_('Raises'), rolename='exc',
names=('raises', 'raise', 'exception', 'except'),
can_collapse=True),
Field('returnvalue', label=_('Returns'), has_arg=False,
names=('returns', 'return')),
PyField('returntype', label=_('Return type'), has_arg=False,
names=('rtype',), bodyrolename='class'),
]
allow_nesting = False
def get_signature_prefix(self, sig: str) -> str:
"""May return a prefix to put before the object name in the
signature.
"""
return ''
def needs_arglist(self) -> bool:
"""May return true if an empty argument list is to be generated even if
the document contains none.
"""
return False
def handle_signature(self, sig: str, signode: desc_signature) -> Tuple[str, str]:
"""Transform a Python signature into RST nodes.
Return (fully qualified name of the thing, classname if any).
If inside a class, the current class name is handled intelligently:
* it is stripped from the displayed name if present
* it is added to the full name (return value) if not present
"""
m = py_sig_re.match(sig)
if m is None:
raise ValueError
prefix, name, arglist, retann = m.groups()
# determine module and class name (if applicable), as well as full name
modname = self.options.get('module', self.env.ref_context.get('py:module'))
classname = self.env.ref_context.get('py:class')
if classname:
add_module = False
if prefix and (prefix == classname or
prefix.startswith(classname + ".")):
fullname = prefix + name
# class name is given again in the signature
prefix = prefix[len(classname):].lstrip('.')
elif prefix:
# class name is given in the signature, but different
# (shouldn't happen)
fullname = classname + '.' + prefix + name
else:
# class name is not given in the signature
fullname = classname + '.' + name
else:
add_module = True
if prefix:
classname = prefix.rstrip('.')
fullname = prefix + name
else:
classname = ''
fullname = name
signode['module'] = modname
signode['class'] = classname
signode['fullname'] = fullname
sig_prefix = self.get_signature_prefix(sig)
if sig_prefix:
signode += addnodes.desc_annotation(sig_prefix, sig_prefix)
if prefix:
signode += addnodes.desc_addname(prefix, prefix)
elif add_module and self.env.config.add_module_names:
if modname and modname != 'exceptions':
# exceptions are a special case, since they are documented in the
# 'exceptions' module.
nodetext = modname + '.'
signode += addnodes.desc_addname(nodetext, nodetext)
signode += addnodes.desc_name(name, name)
if arglist:
try:
signode += _parse_arglist(arglist, self.env)
except SyntaxError:
# fallback to parse arglist original parser.
# it supports to represent optional arguments (ex. "func(foo [, bar])")
_pseudo_parse_arglist(signode, arglist)
except NotImplementedError as exc:
logger.warning("could not parse arglist (%r): %s", arglist, exc,
location=signode)
_pseudo_parse_arglist(signode, arglist)
else:
if self.needs_arglist():
# for callables, add an empty parameter list
signode += addnodes.desc_parameterlist()
if retann:
children = _parse_annotation(retann, self.env)
signode += addnodes.desc_returns(retann, '', *children)
anno = self.options.get('annotation')
if anno:
signode += addnodes.desc_annotation(' ' + anno, ' ' + anno)
return fullname, prefix
def get_index_text(self, modname: str, name: Tuple[str, str]) -> str:
"""Return the text for the index entry of the object."""
raise NotImplementedError('must be implemented in subclasses')
def add_target_and_index(self, name_cls: Tuple[str, str], sig: str,
signode: desc_signature) -> None:
modname = self.options.get('module', self.env.ref_context.get('py:module'))
fullname = (modname + '.' if modname else '') + name_cls[0]
node_id = make_id(self.env, self.state.document, '', fullname)
signode['ids'].append(node_id)
# Assign old styled node_id(fullname) not to break old hyperlinks (if possible)
# Note: Will removed in Sphinx-5.0 (RemovedInSphinx50Warning)
if node_id != fullname and fullname not in self.state.document.ids:
signode['ids'].append(fullname)
self.state.document.note_explicit_target(signode)
domain = cast(PythonDomain, self.env.get_domain('py'))
domain.note_object(fullname, self.objtype, node_id, location=signode)
canonical_name = self.options.get('canonical')
if canonical_name:
domain.note_object(canonical_name, self.objtype, node_id, canonical=True,
location=signode)
if 'noindexentry' not in self.options:
indextext = self.get_index_text(modname, name_cls)
if indextext:
self.indexnode['entries'].append(('single', indextext, node_id, '', None))
def before_content(self) -> None:
"""Handle object nesting before content
:py:class:`PyObject` represents Python language constructs. For
constructs that are nestable, such as a Python classes, this method will
build up a stack of the nesting hierarchy so that it can be later
de-nested correctly, in :py:meth:`after_content`.
For constructs that aren't nestable, the stack is bypassed, and instead
only the most recent object is tracked. This object prefix name will be
removed with :py:meth:`after_content`.
"""
prefix = None
if self.names:
# fullname and name_prefix come from the `handle_signature` method.
# fullname represents the full object name that is constructed using
# object nesting and explicit prefixes. `name_prefix` is the
# explicit prefix given in a signature
(fullname, name_prefix) = self.names[-1]
if self.allow_nesting:
prefix = fullname
elif name_prefix:
prefix = name_prefix.strip('.')
if prefix:
self.env.ref_context['py:class'] = prefix
if self.allow_nesting:
classes = self.env.ref_context.setdefault('py:classes', [])
classes.append(prefix)
if 'module' in self.options:
modules = self.env.ref_context.setdefault('py:modules', [])
modules.append(self.env.ref_context.get('py:module'))
self.env.ref_context['py:module'] = self.options['module']
def after_content(self) -> None:
"""Handle object de-nesting after content
If this class is a nestable object, removing the last nested class prefix
ends further nesting in the object.
If this class is not a nestable object, the list of classes should not
be altered as we didn't affect the nesting levels in
:py:meth:`before_content`.
"""
classes = self.env.ref_context.setdefault('py:classes', [])
if self.allow_nesting:
try:
classes.pop()
except IndexError:
pass
self.env.ref_context['py:class'] = (classes[-1] if len(classes) > 0
else None)
if 'module' in self.options:
modules = self.env.ref_context.setdefault('py:modules', [])
if modules:
self.env.ref_context['py:module'] = modules.pop()
else:
self.env.ref_context.pop('py:module')
class PyFunction(PyObject):
"""Description of a function."""
option_spec: OptionSpec = PyObject.option_spec.copy()
option_spec.update({
'async': directives.flag,
})
def get_signature_prefix(self, sig: str) -> str:
if 'async' in self.options:
return 'async '
else:
return ''
def needs_arglist(self) -> bool:
return True
def add_target_and_index(self, name_cls: Tuple[str, str], sig: str,
signode: desc_signature) -> None:
super().add_target_and_index(name_cls, sig, signode)
if 'noindexentry' not in self.options:
modname = self.options.get('module', self.env.ref_context.get('py:module'))
node_id = signode['ids'][0]
name, cls = name_cls
if modname:
text = _('%s() (in module %s)') % (name, modname)
self.indexnode['entries'].append(('single', text, node_id, '', None))
else:
text = '%s; %s()' % (pairindextypes['builtin'], name)
self.indexnode['entries'].append(('pair', text, node_id, '', None))
def get_index_text(self, modname: str, name_cls: Tuple[str, str]) -> str:
# add index in own add_target_and_index() instead.
return None
class PyDecoratorFunction(PyFunction):
"""Description of a decorator."""
def run(self) -> List[Node]:
# a decorator function is a function after all
self.name = 'py:function'
return super().run()
def handle_signature(self, sig: str, signode: desc_signature) -> Tuple[str, str]:
ret = super().handle_signature(sig, signode)
signode.insert(0, addnodes.desc_addname('@', '@'))
return ret
def needs_arglist(self) -> bool:
return False
class PyVariable(PyObject):
"""Description of a variable."""
option_spec: OptionSpec = PyObject.option_spec.copy()
option_spec.update({
'type': directives.unchanged,
'value': directives.unchanged,
})
def handle_signature(self, sig: str, signode: desc_signature) -> Tuple[str, str]:
fullname, prefix = super().handle_signature(sig, signode)
typ = self.options.get('type')
if typ:
annotations = _parse_annotation(typ, self.env)
signode += addnodes.desc_annotation(typ, '', nodes.Text(': '), *annotations)
value = self.options.get('value')
if value:
signode += addnodes.desc_annotation(value, ' = ' + value)
return fullname, prefix
def get_index_text(self, modname: str, name_cls: Tuple[str, str]) -> str:
name, cls = name_cls
if modname:
return _('%s (in module %s)') % (name, modname)
else:
return _('%s (built-in variable)') % name
class PyClasslike(PyObject):
"""
Description of a class-like object (classes, interfaces, exceptions).
"""
option_spec: OptionSpec = PyObject.option_spec.copy()
option_spec.update({
'final': directives.flag,
})
allow_nesting = True
def get_signature_prefix(self, sig: str) -> str:
if 'final' in self.options:
return 'final %s ' % self.objtype
else:
return '%s ' % self.objtype
def get_index_text(self, modname: str, name_cls: Tuple[str, str]) -> str:
if self.objtype == 'class':
if not modname:
return _('%s (built-in class)') % name_cls[0]
return _('%s (class in %s)') % (name_cls[0], modname)
elif self.objtype == 'exception':
return name_cls[0]
else:
return ''
class PyMethod(PyObject):
"""Description of a method."""
option_spec: OptionSpec = PyObject.option_spec.copy()
option_spec.update({
'abstractmethod': directives.flag,
'async': directives.flag,
'classmethod': directives.flag,
'final': directives.flag,
'property': directives.flag,
'staticmethod': directives.flag,
})
def needs_arglist(self) -> bool:
if 'property' in self.options:
return False
else:
return True
def get_signature_prefix(self, sig: str) -> str:
prefix = []
if 'final' in self.options:
prefix.append('final')
if 'abstractmethod' in self.options:
prefix.append('abstract')
if 'async' in self.options:
prefix.append('async')
if 'classmethod' in self.options:
prefix.append('classmethod')
if 'property' in self.options:
prefix.append('property')
if 'staticmethod' in self.options:
prefix.append('static')
if prefix:
return ' '.join(prefix) + ' '
else:
return ''
def get_index_text(self, modname: str, name_cls: Tuple[str, str]) -> str:
name, cls = name_cls
try:
clsname, methname = name.rsplit('.', 1)
if modname and self.env.config.add_module_names:
clsname = '.'.join([modname, clsname])
except ValueError:
if modname:
return _('%s() (in module %s)') % (name, modname)
else:
return '%s()' % name
if 'classmethod' in self.options:
return _('%s() (%s class method)') % (methname, clsname)
elif 'property' in self.options:
return _('%s() (%s property)') % (methname, clsname)
elif 'staticmethod' in self.options:
return _('%s() (%s static method)') % (methname, clsname)
else:
return _('%s() (%s method)') % (methname, clsname)
class PyClassMethod(PyMethod):
"""Description of a classmethod."""
option_spec: OptionSpec = PyObject.option_spec.copy()
def run(self) -> List[Node]:
self.name = 'py:method'
self.options['classmethod'] = True
return super().run()
class PyStaticMethod(PyMethod):
"""Description of a staticmethod."""
option_spec: OptionSpec = PyObject.option_spec.copy()
def run(self) -> List[Node]:
self.name = 'py:method'
self.options['staticmethod'] = True
return super().run()
class PyDecoratorMethod(PyMethod):
"""Description of a decoratormethod."""
def run(self) -> List[Node]:
self.name = 'py:method'
return super().run()
def handle_signature(self, sig: str, signode: desc_signature) -> Tuple[str, str]:
ret = super().handle_signature(sig, signode)
signode.insert(0, addnodes.desc_addname('@', '@'))
return ret
def needs_arglist(self) -> bool:
return False
class PyAttribute(PyObject):
"""Description of an attribute."""
option_spec: OptionSpec = PyObject.option_spec.copy()
option_spec.update({
'type': directives.unchanged,
'value': directives.unchanged,
})
def handle_signature(self, sig: str, signode: desc_signature) -> Tuple[str, str]:
fullname, prefix = super().handle_signature(sig, signode)
typ = self.options.get('type')
if typ:
annotations = _parse_annotation(typ, self.env)
signode += addnodes.desc_annotation(typ, '', nodes.Text(': '), *annotations)
value = self.options.get('value')
if value:
signode += addnodes.desc_annotation(value, ' = ' + value)
return fullname, prefix
def get_index_text(self, modname: str, name_cls: Tuple[str, str]) -> str:
name, cls = name_cls
try:
clsname, attrname = name.rsplit('.', 1)
if modname and self.env.config.add_module_names:
clsname = '.'.join([modname, clsname])
except ValueError:
if modname:
return _('%s (in module %s)') % (name, modname)
else:
return name
return _('%s (%s attribute)') % (attrname, clsname)
class PyProperty(PyObject):
"""Description of an attribute."""
option_spec = PyObject.option_spec.copy()
option_spec.update({
'abstractmethod': directives.flag,
'type': directives.unchanged,
})
def handle_signature(self, sig: str, signode: desc_signature) -> Tuple[str, str]:
fullname, prefix = super().handle_signature(sig, signode)
typ = self.options.get('type')
if typ:
signode += addnodes.desc_annotation(typ, ': ' + typ)
return fullname, prefix
def get_signature_prefix(self, sig: str) -> str:
prefix = ['property']
if 'abstractmethod' in self.options:
prefix.insert(0, 'abstract')
return ' '.join(prefix) + ' '
def get_index_text(self, modname: str, name_cls: Tuple[str, str]) -> str:
name, cls = name_cls
try:
clsname, attrname = name.rsplit('.', 1)
if modname and self.env.config.add_module_names:
clsname = '.'.join([modname, clsname])
except ValueError:
if modname:
return _('%s (in module %s)') % (name, modname)
else:
return name
return _('%s (%s property)') % (attrname, clsname)
class PyDecoratorMixin:
"""
Mixin for decorator directives.
"""
def handle_signature(self, sig: str, signode: desc_signature) -> Tuple[str, str]:
for cls in self.__class__.__mro__:
if cls.__name__ != 'DirectiveAdapter':
warnings.warn('PyDecoratorMixin is deprecated. '
'Please check the implementation of %s' % cls,
RemovedInSphinx50Warning, stacklevel=2)
break
else:
warnings.warn('PyDecoratorMixin is deprecated',
RemovedInSphinx50Warning, stacklevel=2)
ret = super().handle_signature(sig, signode) # type: ignore
signode.insert(0, addnodes.desc_addname('@', '@'))
return ret
def needs_arglist(self) -> bool:
return False
class PyModule(SphinxDirective):
"""
Directive to mark description of a new module.
"""
has_content = False
required_arguments = 1
optional_arguments = 0
final_argument_whitespace = False
option_spec: OptionSpec = {
'platform': lambda x: x,
'synopsis': lambda x: x,
'noindex': directives.flag,
'deprecated': directives.flag,
}
def run(self) -> List[Node]:
domain = cast(PythonDomain, self.env.get_domain('py'))
modname = self.arguments[0].strip()
noindex = 'noindex' in self.options
self.env.ref_context['py:module'] = modname
ret = [] # type: List[Node]
if not noindex:
# note module to the domain
node_id = make_id(self.env, self.state.document, 'module', modname)
target = nodes.target('', '', ids=[node_id], ismod=True)
self.set_source_info(target)
# Assign old styled node_id not to break old hyperlinks (if possible)
# Note: Will removed in Sphinx-5.0 (RemovedInSphinx50Warning)
old_node_id = self.make_old_id(modname)
if node_id != old_node_id and old_node_id not in self.state.document.ids:
target['ids'].append(old_node_id)
self.state.document.note_explicit_target(target)
domain.note_module(modname,
node_id,
self.options.get('synopsis', ''),
self.options.get('platform', ''),
'deprecated' in self.options)
domain.note_object(modname, 'module', node_id, location=target)
# the platform and synopsis aren't printed; in fact, they are only
# used in the modindex currently
ret.append(target)
indextext = '%s; %s' % (pairindextypes['module'], modname)
inode = addnodes.index(entries=[('pair', indextext, node_id, '', None)])
ret.append(inode)
return ret
def make_old_id(self, name: str) -> str:
"""Generate old styled node_id.
Old styled node_id is incompatible with docutils' node_id.
It can contain dots and hyphens.
.. note:: Old styled node_id was mainly used until Sphinx-3.0.
"""
return 'module-%s' % name
class PyCurrentModule(SphinxDirective):
"""
This directive is just to tell Sphinx that we're documenting
stuff in module foo, but links to module foo won't lead here.
"""
has_content = False
required_arguments = 1
optional_arguments = 0
final_argument_whitespace = False
option_spec: OptionSpec = {}
def run(self) -> List[Node]:
modname = self.arguments[0].strip()
if modname == 'None':
self.env.ref_context.pop('py:module', None)
else:
self.env.ref_context['py:module'] = modname
return []
class PyXRefRole(XRefRole):
def process_link(self, env: BuildEnvironment, refnode: Element,
has_explicit_title: bool, title: str, target: str) -> Tuple[str, str]:
refnode['py:module'] = env.ref_context.get('py:module')
refnode['py:class'] = env.ref_context.get('py:class')
if not has_explicit_title:
title = title.lstrip('.') # only has a meaning for the target
target = target.lstrip('~') # only has a meaning for the title
# if the first character is a tilde, don't display the module/class
# parts of the contents
if title[0:1] == '~':
title = title[1:]
dot = title.rfind('.')
if dot != -1:
title = title[dot + 1:]
# if the first character is a dot, search more specific namespaces first
# else search builtins first
if target[0:1] == '.':
target = target[1:]
refnode['refspecific'] = True
return title, target
def filter_meta_fields(app: Sphinx, domain: str, objtype: str, content: Element) -> None:
"""Filter ``:meta:`` field from its docstring."""
if domain != 'py':
return
for node in content:
if isinstance(node, nodes.field_list):
fields = cast(List[nodes.field], node)
for field in fields:
field_name = cast(nodes.field_body, field[0]).astext().strip()
if field_name == 'meta' or field_name.startswith('meta '):
node.remove(field)
break
class PythonModuleIndex(Index):
"""
Index subclass to provide the Python module index.
"""
name = 'modindex'
localname = _('Python Module Index')
shortname = _('modules')
def generate(self, docnames: Iterable[str] = None
) -> Tuple[List[Tuple[str, List[IndexEntry]]], bool]:
content = {} # type: Dict[str, List[IndexEntry]]
# list of prefixes to ignore
ignores = None # type: List[str]
ignores = self.domain.env.config['modindex_common_prefix'] # type: ignore
ignores = sorted(ignores, key=len, reverse=True)
# list of all modules, sorted by module name
modules = sorted(self.domain.data['modules'].items(),
key=lambda x: x[0].lower())
# sort out collapsable modules
prev_modname = ''
num_toplevels = 0
for modname, (docname, node_id, synopsis, platforms, deprecated) in modules:
if docnames and docname not in docnames:
continue
for ignore in ignores:
if modname.startswith(ignore):
modname = modname[len(ignore):]
stripped = ignore
break
else:
stripped = ''
# we stripped the whole module name?
if not modname:
modname, stripped = stripped, ''
entries = content.setdefault(modname[0].lower(), [])
package = modname.split('.')[0]
if package != modname:
# it's a submodule
if prev_modname == package:
# first submodule - make parent a group head
if entries:
last = entries[-1]
entries[-1] = IndexEntry(last[0], 1, last[2], last[3],
last[4], last[5], last[6])
elif not prev_modname.startswith(package):
# submodule without parent in list, add dummy entry
entries.append(IndexEntry(stripped + package, 1, '', '', '', '', ''))
subtype = 2
else:
num_toplevels += 1
subtype = 0
qualifier = _('Deprecated') if deprecated else ''
entries.append(IndexEntry(stripped + modname, subtype, docname,
node_id, platforms, qualifier, synopsis))
prev_modname = modname
# apply heuristics when to collapse modindex at page load:
# only collapse if number of toplevel modules is larger than
# number of submodules
collapse = len(modules) - num_toplevels < num_toplevels
# sort by first letter
sorted_content = sorted(content.items())
return sorted_content, collapse
class PythonDomain(Domain):
"""Python language domain."""
name = 'py'
label = 'Python'
object_types = {
'function': ObjType(_('function'), 'func', 'obj'),
'data': ObjType(_('data'), 'data', 'obj'),
'class': ObjType(_('class'), 'class', 'exc', 'obj'),
'exception': ObjType(_('exception'), 'exc', 'class', 'obj'),
'method': ObjType(_('method'), 'meth', 'obj'),
'classmethod': ObjType(_('class method'), 'meth', 'obj'),
'staticmethod': ObjType(_('static method'), 'meth', 'obj'),
'attribute': ObjType(_('attribute'), 'attr', 'obj'),
'property': ObjType(_('property'), 'attr', '_prop', 'obj'),
'module': ObjType(_('module'), 'mod', 'obj'),
} # type: Dict[str, ObjType]
directives = {
'function': PyFunction,
'data': PyVariable,
'class': PyClasslike,
'exception': PyClasslike,
'method': PyMethod,
'classmethod': PyClassMethod,
'staticmethod': PyStaticMethod,
'attribute': PyAttribute,
'property': PyProperty,
'module': PyModule,
'currentmodule': PyCurrentModule,
'decorator': PyDecoratorFunction,
'decoratormethod': PyDecoratorMethod,
}
roles = {
'data': PyXRefRole(),
'exc': PyXRefRole(),
'func': PyXRefRole(fix_parens=True),
'class': PyXRefRole(),
'const': PyXRefRole(),
'attr': PyXRefRole(),
'meth': PyXRefRole(fix_parens=True),
'mod': PyXRefRole(),
'obj': PyXRefRole(),
}
initial_data = {
'objects': {}, # fullname -> docname, objtype
'modules': {}, # modname -> docname, synopsis, platform, deprecated
} # type: Dict[str, Dict[str, Tuple[Any]]]
indices = [
PythonModuleIndex,
]
@property
def objects(self) -> Dict[str, ObjectEntry]:
return self.data.setdefault('objects', {}) # fullname -> ObjectEntry
def note_object(self, name: str, objtype: str, node_id: str,
canonical: bool = False, location: Any = None) -> None:
"""Note a python object for cross reference.
.. versionadded:: 2.1
"""
if name in self.objects:
other = self.objects[name]
logger.warning(__('duplicate object description of %s, '
'other instance in %s, use :noindex: for one of them'),
name, other.docname, location=location)
self.objects[name] = ObjectEntry(self.env.docname, node_id, objtype, canonical)
@property
def modules(self) -> Dict[str, ModuleEntry]:
return self.data.setdefault('modules', {}) # modname -> ModuleEntry
def note_module(self, name: str, node_id: str, synopsis: str,
platform: str, deprecated: bool) -> None:
"""Note a python module for cross reference.
.. versionadded:: 2.1
"""
self.modules[name] = ModuleEntry(self.env.docname, node_id,
synopsis, platform, deprecated)
def clear_doc(self, docname: str) -> None:
for fullname, obj in list(self.objects.items()):
if obj.docname == docname:
del self.objects[fullname]
for modname, mod in list(self.modules.items()):
if mod.docname == docname:
del self.modules[modname]
def merge_domaindata(self, docnames: List[str], otherdata: Dict) -> None:
# XXX check duplicates?
for fullname, obj in otherdata['objects'].items():
if obj.docname in docnames:
self.objects[fullname] = obj
for modname, mod in otherdata['modules'].items():
if mod.docname in docnames:
self.modules[modname] = mod
def find_obj(self, env: BuildEnvironment, modname: str, classname: str,
name: str, type: str, searchmode: int = 0
) -> List[Tuple[str, ObjectEntry]]:
"""Find a Python object for "name", perhaps using the given module
and/or classname. Returns a list of (name, object entry) tuples.
"""
# skip parens
if name[-2:] == '()':
name = name[:-2]
if not name:
return []
matches = [] # type: List[Tuple[str, ObjectEntry]]
newname = None
if searchmode == 1:
if type is None:
objtypes = list(self.object_types)
else:
objtypes = self.objtypes_for_role(type)
if objtypes is not None:
if modname and classname:
fullname = modname + '.' + classname + '.' + name
if fullname in self.objects and self.objects[fullname].objtype in objtypes:
newname = fullname
if not newname:
if modname and modname + '.' + name in self.objects and \
self.objects[modname + '.' + name].objtype in objtypes:
newname = modname + '.' + name
elif name in self.objects and self.objects[name].objtype in objtypes:
newname = name
else:
# "fuzzy" searching mode
searchname = '.' + name
matches = [(oname, self.objects[oname]) for oname in self.objects
if oname.endswith(searchname) and
self.objects[oname].objtype in objtypes]
else:
# NOTE: searching for exact match, object type is not considered
if name in self.objects:
newname = name
elif type == 'mod':
# only exact matches allowed for modules
return []
elif classname and classname + '.' + name in self.objects:
newname = classname + '.' + name
elif modname and modname + '.' + name in self.objects:
newname = modname + '.' + name
elif modname and classname and \
modname + '.' + classname + '.' + name in self.objects:
newname = modname + '.' + classname + '.' + name
if newname is not None:
matches.append((newname, self.objects[newname]))
return matches
def resolve_xref(self, env: BuildEnvironment, fromdocname: str, builder: Builder,
type: str, target: str, node: pending_xref, contnode: Element
) -> Element:
modname = node.get('py:module')
clsname = node.get('py:class')
searchmode = 1 if node.hasattr('refspecific') else 0
matches = self.find_obj(env, modname, clsname, target,
type, searchmode)
if not matches and type == 'attr':
# fallback to meth (for property; Sphinx-2.4.x)
# this ensures that `:attr:` role continues to refer to the old property entry
# that defined by ``method`` directive in old reST files.
matches = self.find_obj(env, modname, clsname, target, 'meth', searchmode)
if not matches and type == 'meth':
# fallback to attr (for property)
# this ensures that `:meth:` in the old reST files can refer to the property
# entry that defined by ``property`` directive.
#
# Note: _prop is a secret role only for internal look-up.
matches = self.find_obj(env, modname, clsname, target, '_prop', searchmode)
if not matches:
return None
elif len(matches) > 1:
logger.warning(__('more than one target found for cross-reference %r: %s'),
target, ', '.join(match[0] for match in matches),
type='ref', subtype='python', location=node)
name, obj = matches[0]
if obj[2] == 'module':
return self._make_module_refnode(builder, fromdocname, name, contnode)
else:
# determine the content of the reference by conditions
content = find_pending_xref_condition(node, 'resolved')
if content:
children = content.children
else:
# if not found, use contnode
children = [contnode]
return make_refnode(builder, fromdocname, obj[0], obj[1], children, name)
def resolve_any_xref(self, env: BuildEnvironment, fromdocname: str, builder: Builder,
target: str, node: pending_xref, contnode: Element
) -> List[Tuple[str, Element]]:
modname = node.get('py:module')
clsname = node.get('py:class')
results = [] # type: List[Tuple[str, Element]]
# always search in "refspecific" mode with the :any: role
matches = self.find_obj(env, modname, clsname, target, None, 1)
for name, obj in matches:
if obj[2] == 'module':
results.append(('py:mod',
self._make_module_refnode(builder, fromdocname,
name, contnode)))
else:
# determine the content of the reference by conditions
content = find_pending_xref_condition(node, 'resolved')
if content:
children = content.children
else:
# if not found, use contnode
children = [contnode]
results.append(('py:' + self.role_for_objtype(obj[2]),
make_refnode(builder, fromdocname, obj[0], obj[1],
children, name)))
return results
def _make_module_refnode(self, builder: Builder, fromdocname: str, name: str,
contnode: Node) -> Element:
# get additional info for modules
module = self.modules[name]
title = name
if module.synopsis:
title += ': ' + module.synopsis
if module.deprecated:
title += _(' (deprecated)')
if module.platform:
title += ' (' + module.platform + ')'
return make_refnode(builder, fromdocname, module.docname, module.node_id,
contnode, title)
def get_objects(self) -> Iterator[Tuple[str, str, str, str, str, int]]:
for modname, mod in self.modules.items():
yield (modname, modname, 'module', mod.docname, mod.node_id, 0)
for refname, obj in self.objects.items():
if obj.objtype != 'module': # modules are already handled
if obj.canonical:
# canonical names are not full-text searchable.
yield (refname, refname, obj.objtype, obj.docname, obj.node_id, -1)
else:
yield (refname, refname, obj.objtype, obj.docname, obj.node_id, 1)
def get_full_qualified_name(self, node: Element) -> str:
modname = node.get('py:module')
clsname = node.get('py:class')
target = node.get('reftarget')
if target is None:
return None
else:
return '.'.join(filter(None, [modname, clsname, target]))
def builtin_resolver(app: Sphinx, env: BuildEnvironment,
node: pending_xref, contnode: Element) -> Element:
"""Do not emit nitpicky warnings for built-in types."""
def istyping(s: str) -> bool:
if s.startswith('typing.'):
s = s.split('.', 1)[1]
return s in typing.__all__ # type: ignore
content = find_pending_xref_condition(node, 'resolved')
if content:
contnode = content.children[0] # type: ignore
if node.get('refdomain') != 'py':
return None
elif node.get('reftype') in ('class', 'obj') and node.get('reftarget') == 'None':
return contnode
elif node.get('reftype') in ('class', 'exc'):
reftarget = node.get('reftarget')
if inspect.isclass(getattr(builtins, reftarget, None)):
# built-in class
return contnode
elif istyping(reftarget):
# typing class
return contnode
return None
def setup(app: Sphinx) -> Dict[str, Any]:
app.setup_extension('sphinx.directives')
app.add_domain(PythonDomain)
app.add_config_value('python_use_unqualified_type_names', False, 'env')
app.connect('object-description-transform', filter_meta_fields)
app.connect('missing-reference', builtin_resolver, priority=900)
return {
'version': 'builtin',
'env_version': 3,
'parallel_read_safe': True,
'parallel_write_safe': True,
}
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