"""Convert Markdown-it tokens to docutils nodes."""
from __future__ import annotations
import inspect
import json
import os
import posixpath
import re
from collections import OrderedDict
from contextlib import contextmanager, suppress
from datetime import date, datetime
from types import ModuleType
from typing import (
TYPE_CHECKING,
Any,
Callable,
Iterable,
Iterator,
MutableMapping,
Sequence,
cast,
)
from urllib.parse import urlparse
import docutils
import jinja2
import yaml
from docutils import nodes
from docutils.languages import get_language
from docutils.parsers.rst import Directive, DirectiveError, directives, roles
from docutils.parsers.rst import Parser as RSTParser
from docutils.parsers.rst.directives.misc import Include
from docutils.parsers.rst.languages import get_language as get_language_rst
from docutils.statemachine import StringList
from docutils.transforms.components import Filter
from docutils.utils import Reporter, SystemMessage, new_document
from docutils.utils.code_analyzer import Lexer, LexerError, NumberLines
from markdown_it import MarkdownIt
from markdown_it.common.utils import escapeHtml
from markdown_it.renderer import RendererProtocol
from markdown_it.token import Token
from markdown_it.tree import SyntaxTreeNode
from myst_parser import inventory
from myst_parser._compat import findall
from myst_parser.config.main import MdParserConfig, UrlSchemeType
from myst_parser.mocking import (
MockIncludeDirective,
MockingError,
MockInliner,
MockRSTParser,
MockState,
MockStateMachine,
)
from myst_parser.parsers.directives import MarkupError, parse_directive_text
from myst_parser.warnings_ import MystWarnings, create_warning
from .html_to_nodes import html_to_nodes
if TYPE_CHECKING:
from sphinx.environment import BuildEnvironment
[docs]
def make_document(source_path="notset", parser_cls=RSTParser) -> nodes.document:
"""Create a new docutils document, with the parser classes' default settings."""
if docutils.__version_info__[:2] >= (0, 19):
from docutils.frontend import get_default_settings
settings = get_default_settings(parser_cls)
else:
from docutils.frontend import OptionParser
settings = OptionParser(components=(parser_cls,)).get_default_values()
return new_document(source_path, settings=settings)
REGEX_SCHEME = re.compile(r"^([a-zA-Z][a-zA-Z0-9+.-]*):")
"""RFC 7595: A non-empty scheme component followed by a colon (:),
consisting of a sequence of characters beginning with a letter
and followed by any combination of letters, digits, plus (+), period (.), or hyphen (-).
Although schemes are case-insensitive, the canonical form is lowercase
and documents that specify schemes must do so with lowercase letters.
"""
REGEX_URI_TEMPLATE = re.compile(
r"{{\s*(uri|scheme|netloc|path|params|query|fragment)\s*}}"
)
REGEX_DIRECTIVE_START = re.compile(r"^[\s]{0,3}([`]{3,10}|[~]{3,10}|[:]{3,10})\{")
[docs]
def token_line(token: SyntaxTreeNode, default: int | None = None) -> int:
"""Retrieve the initial line of a token."""
if not getattr(token, "map", None):
if default is not None:
return default
raise ValueError(f"token map not set: {token}")
return token.map[0] # type: ignore[index]
[docs]
class DocutilsRenderer(RendererProtocol):
"""A markdown-it-py renderer to populate (in-place) a `docutils.document` AST.
Note, this render is not dependent on Sphinx.
"""
__output__ = "docutils"
def __init__(self, parser: MarkdownIt) -> None:
"""Load the renderer (called by ``MarkdownIt``)"""
self.md = parser
self.rules = {
k: v
for k, v in inspect.getmembers(self, predicate=inspect.ismethod)
if k.startswith("render_") and k != "render_children"
}
# these are lazy loaded, when needed
self._inventories: None | dict[str, inventory.InventoryType] = None
def __getattr__(self, name: str):
"""Warn when the renderer has not been setup yet."""
if name in (
"md_env",
"md_config",
"md_options",
"document",
"current_node",
"reporter",
"language_module_rst",
"_heading_offset",
"_level_to_section",
):
raise AttributeError(
f"'{name}' attribute is not available until setup_render() is called"
)
raise AttributeError(
f"'{type(self).__name__}' object has no attribute '{name}'"
)
[docs]
def setup_render(
self, options: dict[str, Any], env: MutableMapping[str, Any]
) -> None:
"""Setup the renderer with per render variables."""
self.md_env = env
self.md_options = options
self.md_config: MdParserConfig = options["myst_config"]
self.document: nodes.document = options.get("document", make_document())
self.current_node: nodes.Element = options.get("current_node", self.document)
self.reporter: Reporter = self.document.reporter
# note there are actually two possible language modules:
# one from docutils.languages, and one from docutils.parsers.rst.languages
self.language_module_rst: ModuleType = get_language_rst(
self.document.settings.language_code
)
self._heading_offset: int = 0
# a mapping of heading levels to its currently associated node
self._level_to_section: dict[int, nodes.document | nodes.section] = {
0: self.document
}
# mapping of section slug to (line, id, implicit_text)
self._heading_slugs: dict[str, tuple[int | None, str, str]] = {}
@property
def sphinx_env(self) -> BuildEnvironment | None:
"""Return the sphinx env, if using Sphinx."""
try:
return self.document.settings.env
except AttributeError:
return None
[docs]
def create_warning(
self,
message: str,
subtype: MystWarnings,
*,
line: int | None = None,
append_to: nodes.Element | None = None,
) -> nodes.system_message | None:
"""Generate a warning, logging if it is necessary.
If the warning type is listed in the ``suppress_warnings`` configuration,
then ``None`` will be returned and no warning logged.
"""
return create_warning(
self.document,
message,
subtype,
line=line,
append_to=append_to,
)
def _render_tokens(self, tokens: list[Token]) -> None:
"""Render the tokens."""
# propagate line number down to inline elements
for token in tokens:
if not token.map:
continue
# For docutils we want 1 based line numbers (not 0)
token.map = [token.map[0] + 1, token.map[1] + 1]
for token_child in token.children or []:
token_child.map = token.map
# nest tokens
node_tree = SyntaxTreeNode(tokens)
# move footnote definitions to env
self.md_env.setdefault("foot_refs", {})
for node in node_tree.walk(include_self=True):
new_children = []
for child in node.children:
if child.type == "footnote_reference":
label = child.meta["label"]
self.md_env["foot_refs"].setdefault(label, []).append(child)
else:
new_children.append(child)
node.children = new_children
# render
for child in node_tree.children:
# skip hidden?
if f"render_{child.type}" in self.rules:
self.rules[f"render_{child.type}"](child)
else:
self.create_warning(
f"No render method for: {child.type}",
MystWarnings.RENDER_METHOD,
line=token_line(child, default=0),
append_to=self.current_node,
)
[docs]
def render(
self, tokens: Sequence[Token], options, md_env: MutableMapping[str, Any]
) -> nodes.document:
"""Run the render on a token stream.
:param tokens: list on block tokens to render
:param options: params of parser instance
:param md_env: the markdown-it environment sandbox associated with the tokens,
containing additional metadata like reference info
"""
self.setup_render(options, md_env)
self._render_initialise()
self._render_tokens(list(tokens))
self._render_finalise()
return self.document
def _render_initialise(self) -> None:
"""Initialise the render of the document."""
self.current_node.extend(
html_meta_to_nodes(
self.md_config.html_meta,
document=self.document,
line=0,
reporter=self.reporter,
)
)
def _render_finalise(self) -> None:
"""Finalise the render of the document."""
# save for later reference resolution
self.document.myst_slugs = self._heading_slugs
if self._heading_slugs and self.sphinx_env:
self.sphinx_env.metadata[self.sphinx_env.docname]["myst_slugs"] = (
self._heading_slugs
)
# log warnings for duplicate reference definitions
# "duplicate_refs": [{"href": "ijk", "label": "B", "map": [4, 5], "title": ""}],
for dup_ref in self.md_env.get("duplicate_refs", []):
self.create_warning(
f"Duplicate reference definition: {dup_ref['label']}",
MystWarnings.MD_DEF_DUPE,
line=dup_ref["map"][0] + 1,
append_to=self.document,
)
# we don't use the foot_references stored in the env
# since references within directives/roles will have been added after
# those from the initial markdown parse
# instead we gather them from a walk of the created document
foot_refs = OrderedDict()
for refnode in findall(self.document)(nodes.footnote_reference):
if refnode["refname"] not in foot_refs:
foot_refs[refnode["refname"]] = True
if foot_refs and self.md_config.footnote_transition:
self.current_node.append(nodes.transition(classes=["footnotes"]))
for footref in foot_refs:
foot_ref_tokens = self.md_env["foot_refs"].get(footref, [])
if len(foot_ref_tokens) > 1:
self.create_warning(
f"Multiple footnote definitions found for label: '{footref}'",
MystWarnings.MD_FOOTNOTE_DUPE,
append_to=self.current_node,
)
if len(foot_ref_tokens) < 1:
self.create_warning(
f"No footnote definitions found for label: '{footref}'",
MystWarnings.MD_FOOTNOTE_MISSING,
append_to=self.current_node,
)
else:
self.render_footnote_reference(foot_ref_tokens[0])
# Add the wordcount, generated by the ``mdit_py_plugins.wordcount_plugin``.
wordcount_metadata = self.md_env.get("wordcount", {})
if wordcount_metadata:
# save the wordcount to the sphinx BuildEnvironment metadata
if self.sphinx_env is not None:
meta = self.sphinx_env.metadata.setdefault(self.sphinx_env.docname, {})
meta["wordcount"] = wordcount_metadata
# now add the wordcount as substitution definitions,
# so we can reference them in the document
for key in ("words", "minutes"):
value = wordcount_metadata.get(key, None)
if value is None:
continue
substitution_node = nodes.substitution_definition(
str(value), nodes.Text(str(value))
)
substitution_node.source = self.document["source"]
substitution_node["names"].append(f"wordcount-{key}")
self.document.note_substitution_def(
substitution_node, f"wordcount-{key}"
)
[docs]
def nested_render_text(
self,
text: str,
lineno: int,
inline: bool = False,
temp_root_node: None | nodes.Element = None,
heading_offset: int = 0,
) -> None:
"""Render unparsed text (appending to the current node).
:param text: the text to render
:param lineno: the starting line number of the text, within the full source
:param inline: whether the text is inline or block
:param temp_root_node: If set, allow sections to be created as children of this node
:param heading_offset: offset heading levels by this amount
"""
tokens = (
self.md.parseInline(text, self.md_env)
if inline
else self.md.parse(text + "\n", self.md_env)
)
# remove front matter, if present, e.g. from included documents
if tokens and tokens[0].type == "front_matter":
tokens.pop(0)
# update the line numbers
for token in tokens:
if token.map:
token.map = [token.map[0] + lineno, token.map[1] + lineno]
@contextmanager
def _restore():
current_heading_offset = self._heading_offset
self._heading_offset = heading_offset
if temp_root_node is not None:
# we need to temporarily set the root node,
# and we also want to restore the level_to_section mapping at the end
current_level_to_section = dict(self._level_to_section.items())
current_root_node = self.md_env.get("temp_root_node", None)
self.md_env["temp_root_node"] = temp_root_node
yield
self._heading_offset = current_heading_offset
if temp_root_node is not None:
self.md_env["temp_root_node"] = current_root_node
self._level_to_section = current_level_to_section
with _restore():
self._render_tokens(tokens)
[docs]
@contextmanager
def current_node_context(
self, node: nodes.Element, append: bool = False
) -> Iterator[None]:
"""Context manager for temporarily setting the current node."""
if append:
self.current_node.append(node)
current_node = self.current_node
self.current_node = node
yield
self.current_node = current_node
[docs]
def render_children(self, token: SyntaxTreeNode) -> None:
"""Render the children of a token."""
for child in token.children or []:
if f"render_{child.type}" in self.rules:
self.rules[f"render_{child.type}"](child)
else:
self.create_warning(
f"No render method for: {child.type}",
MystWarnings.RENDER_METHOD,
line=token_line(child, default=0),
append_to=self.current_node,
)
[docs]
def add_line_and_source_path(self, node, token: SyntaxTreeNode) -> None:
"""Copy the line number and document source path to the docutils node."""
with suppress(ValueError):
node.line = token_line(token)
node.source = self.document["source"]
[docs]
def add_line_and_source_path_r(
self, nodes_: list[nodes.Element], token: SyntaxTreeNode
) -> None:
"""Copy the line number and document source path to the docutils nodes,
and recursively to all descendants.
"""
for node in nodes_:
self.add_line_and_source_path(node, token)
for child in findall(node)():
self.add_line_and_source_path(child, token)
[docs]
def copy_attributes(
self,
token: SyntaxTreeNode,
node: nodes.Element,
keys: Sequence[str] = ("class",),
*,
converters: dict[str, Callable[[str], Any]] | None = None,
aliases: dict[str, str] | None = None,
) -> None:
"""Copy attributes on the token to the docutils node.
:param token: the token to copy attributes from
:param node: the node to copy attributes to
:param keys: the keys to copy from the token (after aliasing)
:param converters: a dictionary of converters for the attributes
:param aliases: a dictionary mapping the token key name to the node key name
"""
if converters is None:
converters = {}
if aliases is None:
aliases = {}
for key, value in token.attrs.items():
key = aliases.get(key, key)
if key not in keys:
continue
if key == "class":
node["classes"].extend(str(value).split())
elif key == "id":
name = nodes.fully_normalize_name(str(value))
node["names"].append(name)
self.document.note_explicit_target(node, node)
else:
if key in converters:
try:
value = converters[key](str(value))
except ValueError:
self.create_warning(
f"Invalid {key!r} attribute value: {token.attrs[key]!r}",
MystWarnings.INVALID_ATTRIBUTE,
line=token_line(token, default=0),
append_to=node,
)
continue
node[key] = value
[docs]
def update_section_level_state(self, section: nodes.section, level: int) -> None:
"""Update the section level state, with the new current section and level."""
# find the closest parent section
parent_level = max(
section_level
for section_level in self._level_to_section
if level > section_level
)
parent = self._level_to_section[parent_level]
# if we are jumping up to a non-consecutive level,
# then warn about this, since this will not be propagated in the docutils AST
if (level > parent_level) and (parent_level + 1 != level):
msg = f"Non-consecutive header level increase; H{parent_level} to H{level}"
if parent_level == 0:
msg = f"Document headings start at H{level}, not H1"
self.create_warning(
msg,
MystWarnings.MD_HEADING_NON_CONSECUTIVE,
line=section.line,
append_to=self.current_node,
)
# append the new section to the parent
parent.append(section)
# update the state for this section level
self._level_to_section[level] = section
# Remove all descendant sections from the section level state
self._level_to_section = {
section_level: section
for section_level, section in self._level_to_section.items()
if section_level <= level
}
[docs]
def renderInlineAsText(self, tokens: list[SyntaxTreeNode]) -> str: # noqa: N802
"""Special kludge for image `alt` attributes to conform CommonMark spec.
Don't try to use it! Spec requires to show `alt` content with stripped markup,
instead of simple escaping.
"""
result = ""
for token in tokens or []:
if token.type == "text":
result += token.content
# elif token.type == "image":
# result += self.renderInlineAsText(token.children)
else:
result += self.renderInlineAsText(token.children or [])
return result
# ### render methods for commonmark tokens
[docs]
def render_paragraph(self, token: SyntaxTreeNode) -> None:
para = nodes.paragraph(token.children[0].content if token.children else "")
self.copy_attributes(token, para, keys=("class", "id"))
self.add_line_and_source_path(para, token)
with self.current_node_context(para, append=True):
self.render_children(token)
[docs]
def render_inline(self, token: SyntaxTreeNode) -> None:
self.render_children(token)
[docs]
def render_text(self, token: SyntaxTreeNode) -> None:
self.current_node.append(nodes.Text(token.content))
[docs]
def render_bullet_list(self, token: SyntaxTreeNode) -> None:
list_node = nodes.bullet_list()
if token.markup:
list_node["bullet"] = token.markup
self.copy_attributes(token, list_node, keys=("class", "id"))
self.add_line_and_source_path(list_node, token)
with self.current_node_context(list_node, append=True):
self.render_children(token)
[docs]
def render_ordered_list(self, token: SyntaxTreeNode) -> None:
style = "arabic"
if "style" in token.attrs:
style = {
"decimal": "arabic",
"lower-alpha": "loweralpha",
"upper-alpha": "upperalpha",
"lower-roman": "lowerroman",
"upper-roman": "upperroman",
}.get(str(token.attrs["style"]), style)
list_node = nodes.enumerated_list(enumtype=style, prefix="")
list_node["suffix"] = token.markup # for CommonMark, this should be "." or ")"
# start is starting number
self.copy_attributes(token, list_node, keys=("class", "id", "start"))
self.add_line_and_source_path(list_node, token)
with self.current_node_context(list_node, append=True):
self.render_children(token)
[docs]
def render_list_item(self, token: SyntaxTreeNode) -> None:
item_node = nodes.list_item()
self.copy_attributes(token, item_node, keys=("class", "id"))
self.add_line_and_source_path(item_node, token)
with self.current_node_context(item_node, append=True):
self.render_children(token)
[docs]
def render_em(self, token: SyntaxTreeNode) -> None:
node = nodes.emphasis()
self.add_line_and_source_path(node, token)
with self.current_node_context(node, append=True):
self.render_children(token)
[docs]
def render_softbreak(self, token: SyntaxTreeNode) -> None:
self.current_node.append(nodes.Text("\n"))
[docs]
def render_hardbreak(self, token: SyntaxTreeNode) -> None:
self.current_node.append(nodes.raw("", "<br />\n", format="html"))
self.current_node.append(nodes.raw("", "\\\\\n", format="latex"))
[docs]
def render_strong(self, token: SyntaxTreeNode) -> None:
node = nodes.strong()
self.add_line_and_source_path(node, token)
with self.current_node_context(node, append=True):
self.render_children(token)
[docs]
def render_blockquote(self, token: SyntaxTreeNode) -> None:
quote = nodes.block_quote()
self.copy_attributes(token, quote, keys=("class", "id"))
self.add_line_and_source_path(quote, token)
with self.current_node_context(quote, append=True):
self.render_children(token)
if "attribution" in token.attrs:
attribution = nodes.attribution(token.attrs["attribution"], "")
self.add_line_and_source_path(attribution, token)
with self.current_node_context(attribution, append=True):
self.nested_render_text(
str(token.attrs["attribution"]),
token_line(token, 0),
inline=True,
)
[docs]
def render_hr(self, token: SyntaxTreeNode) -> None:
node = nodes.transition()
self.add_line_and_source_path(node, token)
self.current_node.append(node)
[docs]
def render_code_inline(self, token: SyntaxTreeNode) -> None:
node = nodes.literal(token.content, token.content)
self.add_line_and_source_path(node, token)
self.copy_attributes(
token,
node,
("class", "id", "language"),
aliases={"lexer": "language", "l": "language"},
)
if "language" in node and "code" not in node["classes"]:
node["classes"].append("code")
self.current_node.append(node)
@staticmethod
def _parse_linenos(emphasize_lines: str, num_lines: int) -> list[int]:
"""Parse the `emphasize_lines` argument.
Raises ValueError if the argument is invalid.
"""
from sphinx.util import parselinenos
hl_lines = parselinenos(emphasize_lines, num_lines)
if any(i >= num_lines for i in hl_lines):
raise ValueError(f"out of range(1-{num_lines}")
return [x + 1 for x in hl_lines if x < num_lines]
[docs]
def create_highlighted_code_block(
self,
text: str,
lexer_name: str | None,
number_lines: bool = False,
lineno_start: int = 1,
source: str | None = None,
line: int | None = None,
node_cls: type[nodes.Element] = nodes.literal_block,
emphasize_lines: list[int] | str | None = None,
) -> nodes.Element:
"""Create a literal block with syntax highlighting.
This mimics the behaviour of the `code-block` directive.
In docutils, this directive directly parses the text with the pygments lexer,
whereas in sphinx, the lexer name is only recorded as the `language` attribute,
and the text is lexed later by pygments within the `visit_literal_block`
method of the output format ``SphinxTranslator``.
Note, this function does not add the literal block to the document.
"""
if self.sphinx_env is not None:
node = node_cls(text, text, language=lexer_name or "none")
if number_lines:
node["linenos"] = True
if lineno_start != 1:
node["highlight_args"] = {"linenostart": lineno_start}
if isinstance(emphasize_lines, str):
try:
emphasize_lines = self._parse_linenos(
emphasize_lines, len(text.splitlines())
)
except ValueError as err:
self.create_warning(
f"emphasize_lines: {err}",
MystWarnings.INVALID_ATTRIBUTE,
line=line,
)
if isinstance(emphasize_lines, (list, tuple)):
# TODO emphasize_lines in docutils?
if "highlight_args" not in node:
node["highlight_args"] = {}
node["highlight_args"]["hl_lines"] = emphasize_lines
else:
node = node_cls(
text, classes=["code"] + ([lexer_name] if lexer_name else [])
)
try:
lex_tokens = Lexer(
text,
lexer_name or "",
"short" if self.md_config.highlight_code_blocks else "none",
)
except LexerError as err:
self.reporter.warning(
str(err),
**{
name: value
for name, value in (("source", source), ("line", line))
if value is not None
},
)
lex_tokens = Lexer(text, lexer_name or "", "none")
if number_lines:
lex_tokens = NumberLines(
lex_tokens, lineno_start, lineno_start + len(text.splitlines())
)
for classes, value in lex_tokens:
if classes:
node += nodes.inline(value, value, classes=classes)
else:
# insert as Text to decrease the verbosity of the output
node += nodes.Text(value)
if source is not None:
node.source = source
if line is not None:
node.line = line
return node
[docs]
def render_code_block(self, token: SyntaxTreeNode) -> None:
lexer = token.info.split()[0] if token.info else None
lineno_start = 1
number_lines = False
emphasize_lines = (
str(token.attrs.get("emphasize-lines"))
if "emphasize-lines" in token.attrs
else None
)
if "lineno-start" in token.attrs:
with suppress(ValueError):
lineno_start = int(token.attrs["lineno-start"])
number_lines = True
node = self.create_highlighted_code_block(
token.content,
lexer,
lineno_start=lineno_start,
number_lines=number_lines,
source=self.document["source"],
line=token_line(token, 0) or None,
emphasize_lines=emphasize_lines,
)
self.copy_attributes(token, node, ("class", "id"))
self.current_node.append(node)
[docs]
def render_fence(self, token: SyntaxTreeNode) -> None:
"""Render a fenced code block."""
# split the info into possible ```name arguments
parts = (token.info.strip() if token.info else "").split(maxsplit=1)
name = parts[0] if parts else ""
arguments = parts[1] if len(parts) > 1 else ""
if (not self.md_config.commonmark_only) and (not self.md_config.gfm_only):
if name == "{eval-rst}":
return self.render_restructuredtext(token)
if name.startswith("{") and name.endswith("}"):
return self.render_directive(token, name[1:-1], arguments)
if name in self.md_config.fence_as_directive:
options = {k: str(v) for k, v in token.attrs.items()}
if "id" in options:
options["name"] = options.pop("id")
return self.render_directive(
token, name, arguments, additional_options=options
)
if not name and self.sphinx_env is not None:
# use the current highlight setting, via the ``highlight`` directive,
# or ``highlight_language`` configuration.
name = self.sphinx_env.temp_data.get(
"highlight_language", self.sphinx_env.config.highlight_language
)
lineno_start = 1
number_lines = name in self.md_config.number_code_blocks
emphasize_lines = (
str(token.attrs.get("emphasize-lines"))
if "emphasize-lines" in token.attrs
else None
)
if "lineno-start" in token.attrs:
with suppress(ValueError):
lineno_start = int(token.attrs["lineno-start"])
number_lines = True
node = self.create_highlighted_code_block(
token.content,
name,
number_lines=number_lines,
lineno_start=lineno_start,
source=self.document["source"],
line=token_line(token, 0) or None,
emphasize_lines=emphasize_lines,
)
self.copy_attributes(token, node, ("class", "id"))
self.current_node.append(node)
@property
def blocks_mathjax_processing(self) -> bool:
"""Only add mathjax ignore classes if using sphinx,
and using the ``dollarmath`` extension, and ``myst_update_mathjax=True``.
"""
return (
self.sphinx_env is not None
and "dollarmath" in self.md_config.enable_extensions
and self.md_config.update_mathjax
)
[docs]
def generate_heading_target(
self,
token: SyntaxTreeNode,
level: int,
node: nodes.Element,
title_node: nodes.Element,
) -> None:
"""Generate a heading target, and add it to the document."""
implicit_text = clean_astext(title_node)
# create a target reference for the section, based on the heading text.
# Note, this is an implicit target, meaning that it is not prioritised,
# during ref resolution, and is not stored in the document.
# TODO this is purely to mimic docutils, but maybe we don't need it?
# (since we have the slugify logic below)
name = nodes.fully_normalize_name(implicit_text)
node["names"].append(name)
self.document.note_implicit_target(node, node)
if level > self.md_config.heading_anchors:
return
# Create an implicit reference slug.
# The problem with this reference slug,
# is that it might not be in the "normalised" format required by docutils,
# https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html#normalized-reference-names
# so we store it separately, and have separate logic than docutils
# TODO maybe revisit this assumption, or improve the logic
try:
slug = compute_unique_slug(
token,
self._heading_slugs,
self.md_config.heading_slug_func,
)
except Exception as error:
self.create_warning(
str(error),
MystWarnings.HEADING_SLUG,
line=token_line(token, default=0),
append_to=self.current_node,
)
else:
node["slug"] = slug
self._heading_slugs[slug] = (node.line, node["ids"][0], implicit_text)
[docs]
def render_heading(self, token: SyntaxTreeNode) -> None:
"""Render a heading, e.g. `# Heading`."""
level = int(token.tag[1]) + self._heading_offset
# sections are only allowed as a parent of a document or another section
# the only exception to this, is if a directive has called a nested parse,
# and specifically specified that sections are allowed to be created as children
# of its root node (a.k.a match_titles=True)
parent_of_temp_root = (
self.md_env.get("temp_root_node", None) is not None
and self.current_node == self.md_env["temp_root_node"]
)
if not (
parent_of_temp_root
or isinstance(self.current_node, (nodes.document, nodes.section))
):
# if this is not the case, we create a rubric node instead
rubric = nodes.rubric(token.content, "", level=level)
self.add_line_and_source_path(rubric, token)
self.copy_attributes(token, rubric, ("class", "id"))
with self.current_node_context(rubric, append=True):
self.render_children(token)
self.generate_heading_target(token, level, rubric, rubric)
return
# create the section node
new_section = nodes.section()
self.add_line_and_source_path(new_section, token)
self.copy_attributes(token, new_section, ("class", "id"))
# if a top level section,
# then add classes to set default mathjax processing to false
# we then turn it back on, on a per-node basis
if level == 1 and self.blocks_mathjax_processing:
new_section["classes"].extend(["tex2jax_ignore", "mathjax_ignore"])
# update the state of the section levels
self.update_section_level_state(new_section, level)
# create the title for this section
title_node = nodes.title(token.children[0].content if token.children else "")
self.add_line_and_source_path(title_node, token)
new_section.append(title_node)
# render the heading children into the title
with self.current_node_context(title_node):
self.render_children(token)
self.generate_heading_target(token, level, new_section, title_node)
# set the section as the current node for subsequent rendering
self.current_node = new_section
[docs]
def render_link(self, token: SyntaxTreeNode) -> None:
"""Parse `<http://link.com>` or `[text](link "title")` syntax to docutils AST:
- If `myst_all_links_external` is True, forward to `render_link_url`
- If the link token has a class attribute containing `external`,
forward to `render_link_url`
- If the link is an id link (e.g. `#id`), forward to `render_link_anchor`
- If the link has a schema, and the schema is in `url_schemes` (e.g. `http:`),
forward to `render_link_url`
- If the link has an `inv:` schema, forward to `render_link_inventory`
- If the link is an autolink/linkify type link, forward to `render_link_url`
- Otherwise, forward to `render_link_internal`
"""
if (
self.md_config.commonmark_only
or self.md_config.gfm_only
or self.md_config.all_links_external
):
return self.render_link_url(token)
if "class" in token.attrs and "external" in str(token.attrs["class"]).split():
return self.render_link_url(token)
href = cast(str, token.attrGet("href") or "")
if href.startswith("#"):
return self.render_link_anchor(token, href)
scheme_match = REGEX_SCHEME.match(href)
scheme = None if scheme_match is None else scheme_match.group(1)
if scheme in self.md_config.url_schemes:
return self.render_link_url(token, self.md_config.url_schemes[scheme])
if scheme == "inv":
return self.render_link_inventory(token)
if scheme == "path":
return self.render_link_path(token)
if scheme == "project":
return self.render_link_project(token)
if token.info == "auto":
# handles both autolink and linkify
return self.render_link_url(token)
return self.render_link_unknown(token)
[docs]
def render_link_url(
self, token: SyntaxTreeNode, conversion: None | UrlSchemeType = None
) -> None:
"""Render link token (including autolink and linkify),
where the link has been identified as an external URL.
"""
ref_node = nodes.reference()
self.add_line_and_source_path(ref_node, token)
attribute_keys = ["class", "id", "reftitle", "target", "rel"]
if self.md_config.links_external_new_tab:
token.attrs["target"] = "_blank"
token.attrs["rel"] = "noreferer noopener"
self.copy_attributes(
token, ref_node, attribute_keys, aliases={"title": "reftitle"}
)
uri = cast(str, token.attrGet("href") or "")
implicit_text: str | None = None
if conversion is not None:
# implicit_template: str | None = None
# if isinstance(conversion, (list, tuple)):
# href_template, implicit_template = conversion
# else:
# href_template = conversion
# markdown-it encodes unsafe characters with percent-encoding
# we want to get back the original, source input
uri = self.md.normalizeLinkText(uri)
_parsed = urlparse(uri)
parsed = {
"uri": uri,
"scheme": _parsed.scheme,
"netloc": _parsed.netloc,
"path": _parsed.path,
"params": _parsed.params,
"query": _parsed.query,
"fragment": _parsed.fragment,
}
# Note we specifically do not use jinja2 here,
# to restrict the scope of the templating language,
# so that it can be used in a language agnostic way
if "url" in conversion:
uri = re.sub(
REGEX_URI_TEMPLATE,
lambda match: parsed.get(match.group(1), ""),
conversion["url"],
)
uri = self.md.normalizeLink(uri)
if "title" in conversion and (token.info == "auto" or not token.children):
implicit_text = re.sub(
REGEX_URI_TEMPLATE,
lambda match: parsed.get(match.group(1), ""),
conversion["title"],
)
if "classes" in conversion:
ref_node["classes"].extend(conversion["classes"])
ref_node["refuri"] = escapeHtml(uri)
if implicit_text is not None:
with self.current_node_context(ref_node, append=True):
self.current_node.append(nodes.Text(implicit_text))
else:
with self.current_node_context(ref_node, append=True):
self.render_children(token)
[docs]
def render_link_path(self, token: SyntaxTreeNode) -> None:
"""Render a link token like `<path:...>`."""
self.create_warning(
"`path:` scheme not yet supported in docutils",
MystWarnings.NOT_SUPPORTED,
line=token_line(token, 0),
append_to=self.current_node,
)
return self.render_link_url(token)
[docs]
def render_link_project(self, token: SyntaxTreeNode) -> None:
"""Render a link token like `<project:...>`."""
destination = cast(str, token.attrGet("href") or "")
if destination.startswith("project:"):
destination = destination[8:]
if destination.startswith("#"):
return self.render_link_anchor(token, destination)
self.create_warning(
"`project:` scheme for file paths not yet supported in docutils",
MystWarnings.NOT_SUPPORTED,
line=token_line(token, 0),
append_to=self.current_node,
)
return self.render_link_url(token)
[docs]
def render_link_anchor(self, token: SyntaxTreeNode, target: str) -> None:
"""Render link token like `[text](#target)`, to a local target.
:target: the target id, e.g. `#target`
"""
ref_node = nodes.reference()
self.add_line_and_source_path(ref_node, token)
ref_node["id_link"] = True
ref_node["refuri"] = self.md.normalizeLinkText(target)
self.copy_attributes(
token, ref_node, ("class", "id", "reftitle"), aliases={"title": "reftitle"}
)
self.current_node.append(ref_node)
if token.info != "auto":
with self.current_node_context(ref_node):
self.render_children(token)
[docs]
def render_link_unknown(self, token: SyntaxTreeNode) -> None:
"""Render link token `[text](link "title")`,
where the link has not been identified as an external URL::
<reference refname="link" title="title">
text
`text` can contain nested syntax, e.g. `[**bold**](link "title")`.
Note, this is overridden by `SphinxRenderer`, to use `pending_xref` nodes.
"""
ref_node = nodes.reference()
self.add_line_and_source_path(ref_node, token)
self.copy_attributes(
token, ref_node, ("class", "id", "reftitle"), aliases={"title": "reftitle"}
)
ref_node["refname"] = cast(str, token.attrGet("href") or "")
self.document.note_refname(ref_node)
with self.current_node_context(ref_node, append=True):
self.render_children(token)
[docs]
def render_link_inventory(self, token: SyntaxTreeNode) -> None:
r"""Create a link to an inventory object.
This assumes the href is of the form `<scheme>:<path>#<target>`.
The path is of the form `<invs>:<domains>:<otypes>`,
where each of the parts is optional, hence `<scheme>:#<target>` is also valid.
Each of the path parts can contain the `*` wildcard, for example:
`<scheme>:key:*:obj#targe*`.
`\*` is treated as a plain `*`.
"""
# markdown-it encodes unsafe characters with percent-encoding
# we want to get back the original, source input
href = self.md.normalizeLinkText(cast(str, token.attrGet("href") or ""))
# note if the link had explicit text or not (autolinks are always implicit)
explicit = (token.info != "auto") and bool(token.children)
# split the href up into parts
uri_parts = urlparse(href)
target = uri_parts.fragment
invs, domains, otypes = None, None, None
if uri_parts.path:
path_parts = uri_parts.path.split(":")
with suppress(IndexError):
invs = path_parts[0]
domains = path_parts[1]
otypes = path_parts[2]
# find the matches
matches = self.get_inventory_matches(
target=target, invs=invs, domains=domains, otypes=otypes
)
# warn for 0 or >1 matches
if not matches:
filter_str = inventory.filter_string(invs, domains, otypes, target)
self.create_warning(
f"No matches for {filter_str!r}",
MystWarnings.IREF_MISSING,
line=token_line(token, default=0),
append_to=self.current_node,
)
return
if len(matches) > 1:
show_num = 3
filter_str = inventory.filter_string(invs, domains, otypes, target)
matches_str = ", ".join(
[
inventory.filter_string(m.inv, m.domain, m.otype, m.name)
for m in matches[:show_num]
]
)
if len(matches) > show_num:
matches_str += ", ..."
self.create_warning(
f"Multiple matches for {filter_str!r}: {matches_str}",
MystWarnings.IREF_AMBIGUOUS,
line=token_line(token, default=0),
append_to=self.current_node,
)
# create the docutils node
match = matches[0]
ref_node = nodes.reference("", "", internal=False)
ref_node["inv_match"] = inventory.filter_string(
match.inv, match.domain, match.otype, match.name
)
self.add_line_and_source_path(ref_node, token)
self.copy_attributes(
token, ref_node, ("class", "id", "reftitle"), aliases={"title": "reftitle"}
)
ref_node["refuri"] = (
posixpath.join(match.base_url, match.loc) if match.base_url else match.loc
)
if "reftitle" not in ref_node:
ref_node["reftitle"] = f"{match.project} {match.version}".strip()
self.current_node.append(ref_node)
if explicit:
with self.current_node_context(ref_node):
self.render_children(token)
elif match.text:
ref_node.append(nodes.Text(match.text))
else:
ref_node.append(nodes.literal(match.name, match.name))
[docs]
def get_inventory_matches(
self,
*,
invs: str | None,
domains: str | None,
otypes: str | None,
target: str | None,
) -> list[inventory.InvMatch]:
"""Return inventory matches.
This will be overridden for sphinx, to use intersphinx config.
"""
if self._inventories is None:
self._inventories = {}
for key, (uri, path) in self.md_config.inventories.items():
load_path = posixpath.join(uri, "objects.inv") if path is None else path
self.reporter.info(f"Loading inventory {key!r}: {load_path}")
try:
inv = inventory.fetch_inventory(load_path, base_url=uri)
except Exception as exc:
self.create_warning(
f"Failed to load inventory {key!r}: {exc}",
MystWarnings.INV_LOAD,
)
else:
self._inventories[key] = inv
return list(
inventory.filter_inventories(
self._inventories,
invs=invs,
domains=domains,
otypes=otypes,
targets=target,
)
)
[docs]
def render_html_inline(self, token: SyntaxTreeNode) -> None:
self.render_html_block(token)
[docs]
def render_html_block(self, token: SyntaxTreeNode) -> None:
node_list = html_to_nodes(token.content, token_line(token), self)
self.current_node.extend(node_list)
[docs]
def render_image(self, token: SyntaxTreeNode) -> None:
img_node = nodes.image()
self.add_line_and_source_path(img_node, token)
destination = cast(str, token.attrGet("src") or "")
if self.md_env.get(
"relative-images", None
) is not None and not REGEX_SCHEME.match(destination):
# make the path relative to an "including" document
# this is set when using the `relative-images` option of the MyST `include` directive
destination = os.path.normpath(
os.path.join(
self.md_env.get("relative-images", ""),
os.path.normpath(destination),
)
)
img_node["uri"] = destination
img_node["alt"] = self.renderInlineAsText(token.children or [])
self.copy_attributes(
token,
img_node,
("class", "id", "title", "width", "height", "align"),
converters={
"width": directives.length_or_percentage_or_unitless,
"height": directives.length_or_unitless,
"align": lambda x: directives.choice(x, ("left", "center", "right")),
},
aliases={"w": "width", "h": "height", "a": "align"},
)
self.current_node.append(img_node)
# ### render methods for plugin tokens
[docs]
def render_span(self, token: SyntaxTreeNode) -> None:
"""Render an inline span token."""
node = nodes.inline()
self.add_line_and_source_path(node, token)
self.copy_attributes(token, node, ("class", "id"))
with self.current_node_context(node, append=True):
self.render_children(token)
[docs]
def render_front_matter(self, token: SyntaxTreeNode) -> None:
"""Pass document front matter data."""
position = token_line(token, default=0)
if isinstance(token.content, str):
try:
data = yaml.safe_load(token.content)
except (yaml.parser.ParserError, yaml.scanner.ScannerError):
self.create_warning(
"Malformed YAML",
MystWarnings.MD_TOPMATTER,
line=position,
append_to=self.current_node,
)
return
else:
data = token.content
if not isinstance(data, dict):
self.create_warning(
f"YAML is not a dict: {type(data)}",
MystWarnings.MD_TOPMATTER,
line=position,
append_to=self.current_node,
)
return
fields = {
k: v
for k, v in data.items()
if k not in ("myst", "mystnb", "substitutions", "html_meta")
}
if fields:
field_list = self.dict_to_fm_field_list(
fields, language_code=self.document.settings.language_code
)
self.current_node.append(field_list)
if data.get("title") and self.md_config.title_to_header:
self.nested_render_text(f"# {data['title']}", 0)
[docs]
def dict_to_fm_field_list(
self, data: dict[str, Any], language_code: str, line: int = 0
) -> nodes.field_list:
"""Render each key/val pair as a docutils ``field_node``.
Bibliographic keys below will be parsed as Markdown,
all others will be left as literal text.
The field list should be at the start of the document,
and will then be converted to a `docinfo` node during the
`docutils.docutils.transforms.frontmatter.DocInfo` transform (priority 340),
and bibliographic keys (or their translation) will be converted to nodes::
{'author': docutils.nodes.author,
'authors': docutils.nodes.authors,
'organization': docutils.nodes.organization,
'address': docutils.nodes.address,
'contact': docutils.nodes.contact,
'version': docutils.nodes.version,
'revision': docutils.nodes.revision,
'status': docutils.nodes.status,
'date': docutils.nodes.date,
'copyright': docutils.nodes.copyright,
'dedication': docutils.nodes.topic,
'abstract': docutils.nodes.topic}
Also, the 'dedication' and 'abstract' will be placed outside the `docinfo`,
and so will always be shown in the document.
If using sphinx, this `docinfo` node will later be extracted from the AST,
by the `DoctreeReadEvent` transform (priority 880),
calling `MetadataCollector.process_doc`.
In this case keys and values will be converted to strings and stored in
`app.env.metadata[app.env.docname]`
See
https://www.sphinx-doc.org/en/master/usage/restructuredtext/field-lists.html
for docinfo fields used by sphinx.
"""
field_list = nodes.field_list()
field_list.source, field_list.line = self.document["source"], line
bibliofields = get_language(language_code).bibliographic_fields
for key, value in data.items():
if not isinstance(value, (str, int, float, date, datetime)):
value = json.dumps(value)
value = str(value)
body = nodes.paragraph()
body.source, body.line = self.document["source"], line
if key in bibliofields:
with self.current_node_context(body):
self.nested_render_text(value, line, inline=True)
else:
body += nodes.literal(value, value)
field_node = nodes.field()
field_node.source = value
field_node += nodes.field_name(key, "", nodes.Text(key))
field_node += nodes.field_body(value, *[body])
field_list += field_node
return field_list
[docs]
def render_table(self, token: SyntaxTreeNode) -> None:
# markdown-it table always contains at least a header:
assert token.children
header = token.children[0]
# with one header row
assert header.children
header_row = header.children[0]
assert header_row.children
# top-level element
table = nodes.table()
table["classes"] += ["colwidths-auto"]
self.copy_attributes(token, table, ("class", "id"))
self.add_line_and_source_path(table, token)
self.current_node.append(table)
# column settings element
maxcols = len(header_row.children)
colwidths = [100 // maxcols] * maxcols
tgroup = nodes.tgroup(cols=len(colwidths))
table += tgroup
for colwidth in colwidths:
colspec = nodes.colspec(colwidth=colwidth)
tgroup += colspec
# header
thead = nodes.thead()
tgroup += thead
with self.current_node_context(thead):
self.render_table_row(header_row)
# body
if len(token.children) > 1:
body = token.children[1]
tbody = nodes.tbody()
tgroup += tbody
with self.current_node_context(tbody):
for body_row in body.children or []:
self.render_table_row(body_row)
[docs]
def render_table_row(self, token: SyntaxTreeNode) -> None:
row = nodes.row()
with self.current_node_context(row, append=True):
for child in token.children or []:
entry = nodes.entry()
para = nodes.paragraph(
child.children[0].content if child.children else ""
)
style = child.attrGet("style") # i.e. the alignment when using e.g. :--
if style and style in (
"text-align:left",
"text-align:right",
"text-align:center",
):
entry["classes"].append(f"text-{cast(str, style).split(':')[1]}")
with self.current_node_context(
entry, append=True
), self.current_node_context(para, append=True):
self.render_children(child)
[docs]
def render_s(self, token: SyntaxTreeNode) -> None:
"""Render a strikethrough token."""
# TODO strikethrough not currently directly supported in docutils
self.create_warning(
"Strikethrough is currently only supported in HTML output",
MystWarnings.STRIKETHROUGH,
line=token_line(token, 0),
append_to=self.current_node,
)
self.current_node.append(nodes.raw("", "<s>", format="html"))
self.render_children(token)
self.current_node.append(nodes.raw("", "</s>", format="html"))
[docs]
def render_math_inline(self, token: SyntaxTreeNode) -> None:
content = token.content
node = nodes.math(content, content)
self.add_line_and_source_path(node, token)
self.current_node.append(node)
[docs]
def render_math_inline_double(self, token: SyntaxTreeNode) -> None:
content = token.content
node = nodes.math_block(content, content, nowrap=False, number=None)
self.add_line_and_source_path(node, token)
self.current_node.append(node)
[docs]
def render_math_single(self, token: SyntaxTreeNode) -> None:
content = token.content
node = nodes.math(content, content)
self.add_line_and_source_path(node, token)
self.current_node.append(node)
[docs]
def render_math_block(self, token: SyntaxTreeNode) -> None:
content = token.content
node = nodes.math_block(content, content, nowrap=False, number=None)
self.add_line_and_source_path(node, token)
self.current_node.append(node)
[docs]
def render_math_block_label(self, token: SyntaxTreeNode) -> None:
content = token.content
label = token.info
node = nodes.math_block(content, content, nowrap=False, number=None)
self.add_line_and_source_path(node, token)
name = nodes.fully_normalize_name(label)
node["names"].append(name)
self.document.note_explicit_target(node, node)
self.current_node.append(node)
[docs]
def render_amsmath(self, token: SyntaxTreeNode) -> None:
# note docutils does not currently support the nowrap attribute
# or equation numbering, so this is overridden in the sphinx renderer
node = nodes.math_block(
token.content, token.content, nowrap=True, classes=["amsmath"]
)
if token.meta["numbered"] != "*":
node["numbered"] = True
self.add_line_and_source_path(node, token)
self.current_node.append(node)
[docs]
def render_myst_block_break(self, token: SyntaxTreeNode) -> None:
block_break = nodes.comment(token.content, token.content)
block_break["classes"] += ["block_break"]
self.add_line_and_source_path(block_break, token)
self.current_node.append(block_break)
[docs]
def render_myst_target(self, token: SyntaxTreeNode) -> None:
text = token.content
name = nodes.fully_normalize_name(text)
target = nodes.target(text)
target["names"].append(name)
self.add_line_and_source_path(target, token)
self.document.note_explicit_target(target, self.current_node)
self.current_node.append(target)
[docs]
def render_myst_role(self, token: SyntaxTreeNode) -> None:
name = token.meta["name"]
text = token.content
rawsource = f":{name}:`{token.content}`"
lineno = token_line(token) if token.map else 0
role_func, messages = roles.role(
name, self.language_module_rst, lineno, self.reporter
)
if not role_func:
self.create_warning(
f'Unknown interpreted text role "{name}".',
MystWarnings.UNKNOWN_ROLE,
line=lineno,
append_to=self.current_node,
)
self.current_node.extend(messages)
return
inliner = MockInliner(self)
_nodes, messages2 = role_func(name, rawsource, text, lineno, inliner)
self.current_node += _nodes + messages2
[docs]
def render_colon_fence(self, token: SyntaxTreeNode) -> None:
"""Render a div block, with ``:`` colon delimiters."""
# split the info into possible :::name arguments
parts = (token.info.strip() if token.info else "").split(maxsplit=1)
name = parts[0] if parts else ""
arguments = parts[1] if len(parts) > 1 else ""
if name.startswith("{") and name.endswith("}"):
if token.content.startswith(":::"):
# the content starts with a nested fence block,
# but must distinguish between ``:options:``, so we add a new line
assert token.token is not None, '"colon_fence" must have a `token`'
linear_token = token.token.copy()
linear_token.content = "\n" + linear_token.content
token.token = linear_token
return self.render_directive(token, name[1:-1], arguments)
container = nodes.container(is_div=True)
self.add_line_and_source_path(container, token)
self.copy_attributes(token, container, ("class", "id"))
if name:
# note, as per djot, the name is added to the end of the classes
container["classes"].append(name)
with self.current_node_context(container, append=True):
self.nested_render_text(token.content, token_line(token, 0))
[docs]
def render_dl(self, token: SyntaxTreeNode) -> None:
"""Render a definition list."""
node = nodes.definition_list(classes=["simple", "myst"])
self.copy_attributes(token, node, ("class", "id"))
self.add_line_and_source_path(node, token)
make_terms = ("glossary" in node["classes"]) and (self.sphinx_env is not None)
with self.current_node_context(node, append=True):
item = None
for child in token.children or []:
if child.type == "dt":
item = nodes.definition_list_item()
self.add_line_and_source_path(item, child)
with self.current_node_context(item, append=True):
term = nodes.term(
child.children[0].content if child.children else ""
)
self.add_line_and_source_path(term, child)
with self.current_node_context(term):
self.render_children(child)
if make_terms:
from sphinx.domains.std import make_glossary_term
term = make_glossary_term(
self.sphinx_env, # type: ignore[arg-type]
term.children,
None, # type: ignore[arg-type]
term.source,
term.line,
node_id=None,
document=self.document,
)
self.current_node.append(term)
elif child.type == "dd":
if item is None:
error = self.reporter.error(
(
"Found a definition in a definition list, "
"with no preceding term"
),
# nodes.literal_block(content, content),
line=token_line(child),
)
self.current_node += [error]
with self.current_node_context(item):
definition = nodes.definition()
self.add_line_and_source_path(definition, child)
with self.current_node_context(definition, append=True):
self.render_children(child)
else:
error_msg = self.reporter.error(
(
"Expected a term/definition as a child of a definition list"
f", but found a: {child.type}"
),
# nodes.literal_block(content, content),
line=token_line(child),
)
self.current_node += [error_msg]
[docs]
def render_field_list(self, token: SyntaxTreeNode) -> None:
"""Render a field list."""
field_list = nodes.field_list(classes=["myst"])
self.copy_attributes(token, field_list, ("class", "id"))
self.add_line_and_source_path(field_list, token)
with self.current_node_context(field_list, append=True):
# raise ValueError(token.pretty(show_text=True))
children = (token.children or [])[:]
while children:
child = children.pop(0)
if child.type != "fieldlist_name":
error_msg = self.reporter.error(
(
"Expected a fieldlist_name as a child of a field_list"
f", but found a: {child.type}"
),
# nodes.literal_block(content, content),
line=token_line(child),
)
self.current_node += [error_msg]
break
field = nodes.field()
self.add_line_and_source_path(field, child)
field_list += field
field_name = nodes.field_name()
self.add_line_and_source_path(field_name, child)
field += field_name
with self.current_node_context(field_name):
self.render_children(child)
field_body = nodes.field_body()
self.add_line_and_source_path(field_name, child)
field += field_body
if children and children[0].type == "fieldlist_body":
child = children.pop(0)
with self.current_node_context(field_body):
self.render_children(child)
[docs]
def render_restructuredtext(self, token: SyntaxTreeNode) -> None:
"""Render the content of the token as restructuredtext."""
# copy necessary elements (source, line no, env, reporter)
newdoc = make_document()
newdoc["source"] = self.document["source"]
newdoc.settings = self.document.settings
newdoc.reporter = self.reporter
# pad the line numbers artificially so they offset with the fence block
pseudosource = ("\n" * token_line(token)) + token.content
# actually parse the rst into our document
MockRSTParser().parse(pseudosource, newdoc)
for node in newdoc:
if node["names"]:
self.document.note_explicit_target(node, node)
self.current_node.extend(newdoc.children)
[docs]
def render_directive(
self,
token: SyntaxTreeNode,
name: str,
arguments: str,
*,
additional_options: dict[str, str] | None = None,
) -> None:
"""Render special fenced code blocks as directives.
:param token: the token to render
:param name: the name of the directive
:param arguments: The remaining text on the same line as the directive name.
"""
position = token_line(token)
nodes_list = self.run_directive(
name,
arguments,
token.content,
position,
additional_options=additional_options,
)
self.current_node += nodes_list
[docs]
def run_directive(
self,
name: str,
first_line: str,
content: str,
position: int,
additional_options: dict[str, str] | None = None,
) -> list[nodes.Element]:
"""Run a directive and return the generated nodes.
:param name: the name of the directive
:param first_line: The text on the same line as the directive name.
May be an argument or body text, dependent on the directive
:param content: All text after the first line. Can include options.
:param position: The line number of the first line
:param additional_options: Additional options to add to the directive,
above those parsed from the content.
"""
self.document.current_line = position
# get directive class
output: tuple[Directive | None, list[SystemMessage]] = directives.directive(
name, self.language_module_rst, self.document
)
directive_class, messages = output
if not directive_class:
warn_node = self.create_warning(
f"Unknown directive type: {name!r}",
MystWarnings.UNKNOWN_DIRECTIVE,
line=position,
)
return ([warn_node] if warn_node else []) + messages
if issubclass(directive_class, Include):
# this is a Markdown only option,
# to allow for altering relative image reference links
directive_class.option_spec["relative-images"] = directives.flag
directive_class.option_spec["relative-docs"] = directives.path
directive_class.option_spec["heading-offset"] = directives.nonnegative_int
try:
parsed = parse_directive_text(
directive_class,
first_line,
content,
line=position,
additional_options=additional_options,
)
except MarkupError as error:
error = self.reporter.error(
f"Directive '{name}': {error}",
line=position,
)
return [error]
for _warning in parsed.warnings:
self.create_warning(
f"{name!r}: {_warning.msg}",
_warning.type,
line=_warning.lineno if _warning.lineno is not None else position,
append_to=self.current_node,
)
# initialise directive
if issubclass(directive_class, Include):
directive_instance = MockIncludeDirective(
self,
name=name,
klass=directive_class,
arguments=parsed.arguments,
options=parsed.options,
body=parsed.body,
lineno=position,
)
else:
state_machine = MockStateMachine(self, position)
state = MockState(self, state_machine, position)
directive_instance = directive_class(
name=name,
# the list of positional arguments
arguments=parsed.arguments,
# a dictionary mapping option names to values
options=parsed.options,
# the directive content line by line
content=StringList(parsed.body, self.document["source"]),
# the absolute line number of the first line of the directive
lineno=position,
# the line offset of the first line of the content
content_offset=parsed.body_offset,
# a string containing the entire directive
block_text="\n".join(parsed.body),
state=state,
state_machine=state_machine,
)
# run directive
try:
result = directive_instance.run()
except DirectiveError as error:
msg_node = self.reporter.system_message(
error.level, error.msg, line=position
)
msg_node += nodes.literal_block(content, content)
result = [msg_node]
except MockingError as exc:
error_msg = self.reporter.error(
f"Directive '{name}' cannot be mocked: {exc.__class__.__name__}: {exc}",
nodes.literal_block(content, content),
line=position,
)
return [error_msg]
assert isinstance(
result, list
), f'Directive "{name}" must return a list of nodes.'
for i in range(len(result)):
assert isinstance(
result[i], nodes.Node
), f'Directive "{name}" returned non-Node object (index {i}): {result[i]}'
return result
[docs]
def render_substitution_inline(self, token: SyntaxTreeNode) -> None:
"""Render inline substitution {{key}}."""
self.render_substitution(token, inline=True)
[docs]
def render_substitution_block(self, token: SyntaxTreeNode) -> None:
"""Render block substitution {{key}}."""
self.render_substitution(token, inline=False)
[docs]
def render_substitution(self, token: SyntaxTreeNode, inline: bool) -> None:
"""Substitutions are rendered by:
1. Combining global substitutions with front-matter substitutions
to create a variable context (front-matter takes priority)
2. Add the sphinx `env` to the variable context (if available)
3. Create the string content with Jinja2 (passing it the variable context)
4. If the substitution is inline and not a directive,
parse to nodes ignoring block syntaxes (like lists or block-quotes),
otherwise parse to nodes with all syntax rules.
"""
position = token_line(token)
# front-matter substitutions take priority over config ones
variable_context: dict[str, Any] = {**self.md_config.substitutions}
if self.sphinx_env is not None:
variable_context["env"] = self.sphinx_env
# fail on undefined variables
env = jinja2.Environment(undefined=jinja2.StrictUndefined)
# try rendering
try:
rendered = env.from_string(f"{{{{{token.content}}}}}").render(
variable_context
)
except Exception as error:
self.create_warning(
f"Substitution error:{error.__class__.__name__}: {error}",
MystWarnings.SUBSTITUTION,
line=position,
append_to=self.current_node,
)
return
# handle circular references
ast = env.parse(f"{{{{{token.content}}}}}")
references = {
n.name for n in ast.find_all(jinja2.nodes.Name) if n.name != "env"
}
self.document.sub_references = getattr(self.document, "sub_references", set())
cyclic = references.intersection(self.document.sub_references)
if cyclic:
self.create_warning(
f"circular substitution reference: {cyclic}",
MystWarnings.SUBSTITUTION,
line=position,
append_to=self.current_node,
)
return
# TODO improve error reporting;
# at present, for a multi-line substitution,
# an error may point to a line lower than the substitution
# should it point to the source of the substitution?
# or the error message should at least indicate that its a substitution
# we record used references before nested parsing, then remove them after
self.document.sub_references.update(references)
try:
if inline and not REGEX_DIRECTIVE_START.match(rendered):
self.nested_render_text(rendered, position, inline=True)
else:
self.nested_render_text(rendered, position)
finally:
self.document.sub_references.difference_update(references)
[docs]
def clean_astext(node: nodes.Element) -> str:
"""Like node.astext(), but ignore images.
Copied from sphinx.
"""
node = node.deepcopy()
for img in findall(node)(nodes.image):
img["alt"] = ""
for raw in list(findall(node)(nodes.raw)):
raw.parent.remove(raw)
return node.astext()
_SLUGIFY_CLEAN_REGEX = re.compile(r"[^\w\u4e00-\u9fff\- ]")
[docs]
def default_slugify(title: str) -> str:
"""Default slugify function.
This aims to mimic the GitHub Markdown format, see:
- https://github.com/jch/html-pipeline/blob/master/lib/html/pipeline/toc_filter.rb
- https://gist.github.com/asabaylus/3071099
"""
return _SLUGIFY_CLEAN_REGEX.sub("", title.lower().replace(" ", "-"))
[docs]
def compute_unique_slug(
token_tree: SyntaxTreeNode,
slugs: Iterable[str],
slug_func: None | Callable[[str], str] = None,
) -> str:
"""Compute the slug for a token.
This directly mirrors the logic in `mdit_py_plugins.anchors_plugin`
"""
slug_func = default_slugify if slug_func is None else slug_func
tokens = token_tree.to_tokens()
inline_token = tokens[1]
title = "".join(
child.content
for child in (inline_token.children or [])
if child.type in ["text", "code_inline"]
)
slug = slug_func(title)
i = 1
while slug in slugs:
slug = f"{slug}-{i}"
i += 1
return slug
