def render_internal_link(self, token: SyntaxTreeNode) -> None:
"""Render link token `[text](link "title")`,
where the link has not been identified as an external URL.
"""
destination = unquote(cast(str, token.attrGet("href") or ""))
# make the path relative to an "including" document
# this is set when using the `relative-docs` option of the MyST `include` directive
relative_include = self.md_env.get("relative-docs", None)
if relative_include is not None and destination.startswith(
relative_include[0]):
source_dir, include_dir = relative_include[1:]
destination = os.path.relpath(
os.path.join(include_dir, os.path.normpath(destination)),
source_dir)
potential_path = (
Path(self.doc_env.doc2path(self.doc_env.docname)).parent /
destination
if self.doc_env.srcdir # not set in some test situations
else None)
if (potential_path and potential_path.is_file() and not any(
destination.endswith(suffix)
for suffix in self.doc_env.config.source_suffix)):
wrap_node = addnodes.download_reference(
refdoc=self.doc_env.docname,
reftarget=destination,
reftype="myst",
refdomain=None, # Added to enable cross-linking
refexplicit=len(token.children or []) > 0,
refwarn=False,
)
classes = ["xref", "download", "myst"]
text = destination if not token.children else ""
else:
wrap_node = addnodes.pending_xref(
refdoc=self.doc_env.docname,
reftarget=destination,
reftype="myst",
refdomain=None, # Added to enable cross-linking
refexplicit=len(token.children or []) > 0,
refwarn=True,
)
classes = ["xref", "myst"]
text = ""
self.add_line_and_source_path(wrap_node, token)
title = token.attrGet("title")
if title:
wrap_node["title"] = title
self.current_node.append(wrap_node)
inner_node = nodes.inline("", text, classes=classes)
wrap_node.append(inner_node)
with self.current_node_context(inner_node):
self.render_children(token)
def test_pretty(file_regression):
md = MarkdownIt("commonmark")
tokens = md.parse("""
# Header
Here's some text and an image 
1. a **list**
> a *quote*
""")
node = SyntaxTreeNode(tokens)
file_regression.check(node.pretty(indent=2, show_text=True),
extension=".xml")
def test_walk():
tokens = MarkdownIt().parse(EXAMPLE_MARKDOWN)
tree = SyntaxTreeNode(tokens)
expected_node_types = (
"root",
"heading",
"inline",
"text",
"paragraph",
"inline",
"text",
"strong",
"text",
"text",
)
for node, expected_type in zip(tree.walk(), expected_node_types):
assert node.type == expected_type
def test_type():
tokens = MarkdownIt().parse(EXAMPLE_MARKDOWN)
tree = SyntaxTreeNode(tokens)
# Root type is "root"
assert tree.type == "root"
# "_open" suffix must be stripped from nested token type
assert tree.children[0].type == "heading"
assert tree[0].type == "heading"
# For unnested tokens, node type must remain same as token type
assert tree.children[0].children[0].type == "inline"
def render_colon_fence(self, token: SyntaxTreeNode) -> None:
"""Render a code fence with ``:`` colon delimiters."""
if token.content.startswith(":::"):
# the content starts with a nested fence block,
# but must distinguish between ``:options:``, so we add a new line
# TODO: shouldn't access private attribute
token._attribute_token().content = "\n" + token.content
return self.render_fence(token)
def render_colon_fence(self, token: SyntaxTreeNode) -> None:
"""Render a code fence with ``:`` colon delimiters."""
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_fence(token)
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}",
line=token_line(child, default=0),
subtype="render",
append_to=self.current_node,
)
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.config.get("relative-images",
None) is not None and not is_external_url(
destination, None, True):
# make the path relative to an "including" document
destination = os.path.normpath(
os.path.join(
self.config.get("relative-images", ""),
os.path.normpath(destination),
))
img_node["uri"] = destination
img_node["alt"] = self.renderInlineAsText(token.children or [])
title = token.attrGet("title")
if title:
img_node["title"] = token.attrGet("title")
self.current_node.append(img_node)
def test_sibling_traverse():
tokens = MarkdownIt().parse(EXAMPLE_MARKDOWN)
tree = SyntaxTreeNode(tokens)
paragraph_inline_node = tree.children[1].children[0]
text_node = paragraph_inline_node.children[0]
assert text_node.type == "text"
strong_node = text_node.next_sibling
assert strong_node.type == "strong"
another_text_node = strong_node.next_sibling
assert another_text_node.type == "text"
assert another_text_node.next_sibling is None
assert another_text_node.previous_sibling.previous_sibling == text_node
assert text_node.previous_sibling is None
def render_link(self, token: SyntaxTreeNode) -> None:
if token.markup == "autolink":
return self.render_autolink(token)
ref_node = nodes.reference()
self.add_line_and_source_path(ref_node, token)
destination = cast(str, token.attrGet("href") or "")
if self.config.get("relative-docs",
None) is not None and destination.startswith(
self.config["relative-docs"][0]):
# make the path relative to an "including" document
source_dir, include_dir = self.config["relative-docs"][1:]
destination = os.path.relpath(
os.path.join(include_dir, os.path.normpath(destination)),
source_dir)
ref_node["refuri"] = destination # type: ignore[index]
title = token.attrGet("title")
if title:
ref_node["title"] = title # type: ignore[index]
next_node = ref_node
# TODO currently any reference with a fragment # is deemed external
# (if anchors are not enabled)
# This comes from recommonmark, but I am not sure of the rationale for it
if is_external_url(
destination,
self.config.get("myst_url_schemes", None),
"heading_anchors"
not in self.config.get("myst_extensions", []),
):
self.current_node.append(next_node)
with self.current_node_context(ref_node):
self.render_children(token)
else:
self.handle_cross_reference(token, destination)
def test_property_passthrough():
tokens = MarkdownIt().parse(EXAMPLE_MARKDOWN)
heading_open = tokens[0]
tree = SyntaxTreeNode(tokens)
heading_node = tree.children[0]
assert heading_open.tag == heading_node.tag
assert tuple(heading_open.map) == heading_node.map
assert heading_open.level == heading_node.level
assert heading_open.content == heading_node.content
assert heading_open.markup == heading_node.markup
assert heading_open.info == heading_node.info
assert heading_open.meta == heading_node.meta
assert heading_open.block == heading_node.block
assert heading_open.hidden == heading_node.hidden
def handle_cross_reference(self, token: SyntaxTreeNode,
destination: str) -> None:
"""Create nodes for references that are not immediately resolvable."""
wrap_node = addnodes.pending_xref(
refdoc=self.doc_env.docname,
reftarget=unquote(destination),
reftype="myst",
refdomain=None, # Added to enable cross-linking
refexplicit=len(token.children or []) > 0,
refwarn=True,
)
self.add_line_and_source_path(wrap_node, token)
title = token.attrGet("title")
if title:
wrap_node["title"] = title
self.current_node.append(wrap_node)
inner_node = nodes.inline("", "", classes=["xref", "myst"])
wrap_node.append(inner_node)
with self.current_node_context(inner_node):
self.render_children(token)
def render_heading(self, token: SyntaxTreeNode) -> None:
"""This extends the docutils method, to allow for the addition of heading ids.
These ids are computed by the ``markdown-it-py`` ``anchors_plugin``
as "slugs" which are unique to a document.
The approach is similar to ``sphinx.ext.autosectionlabel``
"""
super().render_heading(token)
if not isinstance(self.current_node, nodes.section):
return
# create the slug string
slug = cast(str, token.attrGet("id"))
if slug is None:
return
section = self.current_node
doc_slug = self.doc_env.doc2path(self.doc_env.docname,
base=False) + "#" + slug
# save the reference in the standard domain, so that it can be handled properly
domain = cast(StandardDomain, self.doc_env.get_domain("std"))
if doc_slug in domain.labels:
other_doc = self.doc_env.doc2path(domain.labels[doc_slug][0])
self.create_warning(
f"duplicate label {doc_slug}, other instance in {other_doc}",
line=section.line,
subtype="anchor",
)
labelid = section["ids"][0]
domain.anonlabels[doc_slug] = self.doc_env.docname, labelid
domain.labels[doc_slug] = (
self.doc_env.docname,
labelid,
clean_astext(section[0]),
)
self.doc_env.metadata[self.doc_env.docname]["myst_anchors"] = True
section["myst-anchor"] = doc_slug
def render_autolink(self, token: SyntaxTreeNode) -> None:
refuri = target = escapeHtml(token.attrGet("href")
or "") # type: ignore[arg-type]
ref_node = nodes.reference(target, target, refuri=refuri)
self.add_line_and_source_path(ref_node, token)
self.current_node.append(ref_node)
def test_tree_to_tokens_conversion():
tokens = MarkdownIt().parse(EXAMPLE_MARKDOWN)
tokens_after_roundtrip = SyntaxTreeNode(tokens).to_tokens()
assert tokens == tokens_after_roundtrip
