"""Allow todos to be inserted into your documentation.
Inclusion of todos can be switched of by a configuration variable.
The todolist directive collects all todos of your project and lists them along
with a backlink to the original location.
"""
from typing import Any, Dict, List, Tuple, cast
from docutils import nodes
from docutils.nodes import Element, Node
from docutils.parsers.rst import directives
from docutils.parsers.rst.directives.admonitions import BaseAdmonition
import sphinx
from sphinx import addnodes
from sphinx.application import Sphinx
from sphinx.domains import Domain
from sphinx.environment import BuildEnvironment
from sphinx.errors import NoUri
from sphinx.locale import _, __
from sphinx.util import logging, texescape
from sphinx.util.docutils import SphinxDirective, new_document
from sphinx.util.typing import OptionSpec
from sphinx.writers.html import HTMLTranslator
from sphinx.writers.latex import LaTeXTranslator
logger = logging.getLogger(__name__)
class todo_node(nodes.Admonition, nodes.Element):
pass
class todolist(nodes.General, nodes.Element):
pass
class Todo(BaseAdmonition, SphinxDirective):
"""
A todo entry, displayed (if configured) in the form of an admonition.
"""
node_class = todo_node
has_content = True
required_arguments = 0
optional_arguments = 0
final_argument_whitespace = False
option_spec: OptionSpec = {
'class': directives.class_option,
'name': directives.unchanged,
}
def run(self) -> List[Node]:
if not self.options.get('class'):
self.options['class'] = ['admonition-todo']
(todo,) = super().run() # type: Tuple[Node]
if isinstance(todo, nodes.system_message):
return [todo]
elif isinstance(todo, todo_node):
todo.insert(0, nodes.title(text=_('Todo')))
todo['docname'] = self.env.docname
self.add_name(todo)
self.set_source_info(todo)
self.state.document.note_explicit_target(todo)
return [todo]
else:
raise RuntimeError # never reached here
class TodoDomain(Domain):
name = 'todo'
label = 'todo'
@property
def todos(self) -> Dict[str, List[todo_node]]:
return self.data.setdefault('todos', {})
def clear_doc(self, docname: str) -> None:
self.todos.pop(docname, None)
def merge_domaindata(self, docnames: List[str], otherdata: Dict) -> None:
for docname in docnames:
self.todos[docname] = otherdata['todos'][docname]
def process_doc(self, env: BuildEnvironment, docname: str,
document: nodes.document) -> None:
todos = self.todos.setdefault(docname, [])
for todo in document.findall(todo_node):
env.app.emit('todo-defined', todo)
todos.append(todo)
if env.config.todo_emit_warnings:
logger.warning(__("TODO entry found: %s"), todo[1].astext(),
location=todo)
class TodoList(SphinxDirective):
"""
A list of all todo entries.
"""
has_content = False
required_arguments = 0
optional_arguments = 0
final_argument_whitespace = False
option_spec: OptionSpec = {}
def run(self) -> List[Node]:
# Simply insert an empty todolist node which will be replaced later
# when process_todo_nodes is called
return [todolist('')]
class TodoListProcessor:
def __init__(self, app: Sphinx, doctree: nodes.document, docname: str) -> None:
self.builder = app.builder
self.config = app.config
self.env = app.env
self.domain = cast(TodoDomain, app.env.get_domain('todo'))
self.document = new_document('')
self.process(doctree, docname)
def process(self, doctree: nodes.document, docname: str) -> None:
todos: List[todo_node] = sum(self.domain.todos.values(), [])
for node in list(doctree.findall(todolist)):
if not self.config.todo_include_todos:
node.parent.remove(node)
continue
if node.get('ids'):
content: List[Element] = [nodes.target()]
else:
content = []
for todo in todos:
# Create a copy of the todo node
new_todo = todo.deepcopy()
new_todo['ids'].clear()
self.resolve_reference(new_todo, docname)
content.append(new_todo)
todo_ref = self.create_todo_reference(todo, docname)
content.append(todo_ref)
node.replace_self(content)
def create_todo_reference(self, todo: todo_node, docname: str) -> nodes.paragraph:
if self.config.todo_link_only:
description = _('<<original entry>>')
else:
description = (_('(The <<original entry>> is located in %s, line %d.)') %
(todo.source, todo.line))
prefix = description[:description.find('<<')]
suffix = description[description.find('>>') + 2:]
para = nodes.paragraph(classes=['todo-source'])
para += nodes.Text(prefix, prefix)
# Create a reference
linktext = nodes.emphasis(_('original entry'), _('original entry'))
reference = nodes.reference('', '', linktext, internal=True)
try:
reference['refuri'] = self.builder.get_relative_uri(docname, todo['docname'])
reference['refuri'] += '#' + todo['ids'][0]
except NoUri:
# ignore if no URI can be determined, e.g. for LaTeX output
pass
para += reference
para += nodes.Text(suffix, suffix)
return para
def resolve_reference(self, todo: todo_node, docname: str) -> None:
"""Resolve references in the todo content."""
for node in todo.findall(addnodes.pending_xref):
if 'refdoc' in node:
node['refdoc'] = docname
# Note: To resolve references, it is needed to wrap it with document node
self.document += todo
self.env.resolve_references(self.document, docname, self.builder)
self.document.remove(todo)
def visit_todo_node(self: HTMLTranslator, node: todo_node) -> None:
if self.config.todo_include_todos:
self.visit_admonition(node)
else:
raise nodes.SkipNode
def depart_todo_node(self: HTMLTranslator, node: todo_node) -> None:
self.depart_admonition(node)
def latex_visit_todo_node(self: LaTeXTranslator, node: todo_node) -> None:
if self.config.todo_include_todos:
self.body.append('\n\\begin{sphinxadmonition}{note}{')
self.body.append(self.hypertarget_to(node))
title_node = cast(nodes.title, node[0])
title = texescape.escape(title_node.astext(), self.config.latex_engine)
self.body.append('%s:}' % title)
node.pop(0)
else:
raise nodes.SkipNode
def latex_depart_todo_node(self: LaTeXTranslator, node: todo_node) -> None:
self.body.append('\\end{sphinxadmonition}\n')
def setup(app: Sphinx) -> Dict[str, Any]:
app.add_event('todo-defined')
app.add_config_value('todo_include_todos', False, 'html')
app.add_config_value('todo_link_only', False, 'html')
app.add_config_value('todo_emit_warnings', False, 'html')
app.add_node(todolist)
app.add_node(todo_node,
html=(visit_todo_node, depart_todo_node),
latex=(latex_visit_todo_node, latex_depart_todo_node),
text=(visit_todo_node, depart_todo_node),
man=(visit_todo_node, depart_todo_node),
texinfo=(visit_todo_node, depart_todo_node))
app.add_directive('todo', Todo)
app.add_directive('todolist', TodoList)
app.add_domain(TodoDomain)
app.connect('doctree-resolved', TodoListProcessor)
return {
'version': sphinx.__display_version__,
'env_version': 2,
'parallel_read_safe': True
}