mamba/docs/source/tools/mermaid_inheritance.py

r"""
    mermaid_inheritance
    ~~~~~~~~~~~~~~~~~~~

    Modified by the CoSApp team from sphinx.ext.inheritance_diagram
    https://gitlab.com/cosapp/cosapp

    Defines a docutils directive for inserting inheritance diagrams.
    Provide the directive with one or more classes or modules (separated
    by whitespace).  For modules, all of the classes in that module will
    be used.
    Example::
       Given the following classes:
       class A: pass
       class B(A): pass
       class C(A): pass
       class D(B, C): pass
       class E(B): pass
       .. inheritance-diagram: D E
       Produces a graph like the following:
                   A
                  / \
                 B   C
                / \ /
               E   D
    The graph is inserted as a PNG+image map into HTML and a PDF in
    LaTeX.
    :copyright: Copyright 2007-2020 by the Sphinx team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

from typing import Any, Dict, Iterable, List, cast

import sphinx
from docutils import nodes
from docutils.nodes import Node
from docutils.parsers.rst import directives
from mermaid import render_mm_html, render_mm_latex, render_mm_texinfo
from sphinx import addnodes
from sphinx.application import Sphinx
from sphinx.environment import BuildEnvironment
from sphinx.ext.inheritance_diagram import (
    InheritanceDiagram,
    InheritanceException,
    InheritanceGraph,
    figure_wrapper,
    get_graph_hash,
    inheritance_diagram,
    skip,
)
from sphinx.writers.html import HTMLTranslator
from sphinx.writers.latex import LaTeXTranslator
from sphinx.writers.texinfo import TexinfoTranslator


class MermaidGraph(InheritanceGraph):
    """
    Given a list of classes, determines the set of classes that they inherit
    from all the way to the root "object", and then is able to generate a
    mermaid graph from them.
    """

    # These are the default attrs
    default_graph_attrs = {}
    #     'rankdir': 'LR',
    #     'size': '"8.0, 12.0"',
    #     'bgcolor': 'transparent',
    # }
    default_node_attrs = {}
    #     'shape': 'box',
    #     'fontsize': 10,
    #     'height': 0.25,
    #     'fontname': '"Vera Sans, DejaVu Sans, Liberation Sans, '
    #                 'Arial, Helvetica, sans"',
    #     'style': '"setlinewidth(0.5),filled"',
    #     'fillcolor': 'white',
    # }
    default_edge_attrs = {}
    #     'arrowsize': 0.5,
    #     'style': '"setlinewidth(0.5)"',
    # }

    def _format_node_attrs(self, attrs: Dict) -> str:
        # return ','.join(['%s=%s' % x for x in sorted(attrs.items())])
        return ""

    def _format_graph_attrs(self, attrs: Dict) -> str:
        # return ''.join(['%s=%s;\n' % x for x in sorted(attrs.items())])
        return ""

    def generate_dot(
        self,
        name: str,
        urls: Dict = {},  # noqa
        env: BuildEnvironment = None,
        graph_attrs: Dict = {},  # noqa
        node_attrs: Dict = {},  # noqa
        edge_attrs: Dict = {},  # noqa
    ) -> str:
        """Generate a mermaid graph from the classes that were passed in
        to __init__.
        *name* is the name of the graph.
        *urls* is a dictionary mapping class names to HTTP URLs.
        *graph_attrs*, *node_attrs*, *edge_attrs* are dictionaries containing
        key/value pairs to pass on as graphviz properties.
        """
        # g_attrs = self.default_graph_attrs.copy()
        # n_attrs = self.default_node_attrs.copy()
        # e_attrs = self.default_edge_attrs.copy()
        # g_attrs.update(graph_attrs)
        # n_attrs.update(node_attrs)
        # e_attrs.update(edge_attrs)
        # if env:
        #     g_attrs.update(env.config.inheritance_graph_attrs)
        #     n_attrs.update(env.config.inheritance_node_attrs)
        #     e_attrs.update(env.config.inheritance_edge_attrs)

        res = []  # type: List[str]

        res.append("classDiagram\n")
        for name, fullname, bases, tooltip in sorted(self.class_info):
            # Write the node
            res.append("  class {!s}\n".format(name))
            if fullname in urls:
                res.append(
                    '  link {!s} "./{!s}" {!s}\n'.format(
                        name, urls[fullname], tooltip or '"{}"'.format(name)
                    )
                )

            # Write the edges
            for base_name in bases:
                res.append("  {!s} <|-- {!s}\n".format(base_name, name))

        return "".join(res)


class mermaid_inheritance(inheritance_diagram):
    """
    A docutils node to use as a placeholder for the inheritance diagram.
    """

    pass


class MermaidDiagram(InheritanceDiagram):
    """
    Run when the mermaid_inheritance directive is first encountered.
    """

    has_content = False
    required_arguments = 1
    optional_arguments = 0
    final_argument_whitespace = True
    option_spec = {
        "parts": int,
        "private-bases": directives.flag,
        "caption": directives.unchanged,
        "top-classes": directives.unchanged_required,
    }

    def run(self) -> List[Node]:
        node = mermaid_inheritance()
        node.document = self.state.document
        class_names = self.arguments[0].split()
        class_role = self.env.get_domain("py").role("class")
        # Store the original content for use as a hash
        node["parts"] = self.options.get("parts", 0)
        node["content"] = ", ".join(class_names)
        node["top-classes"] = []
        for cls in self.options.get("top-classes", "").split(","):
            cls = cls.strip()
            if cls:
                node["top-classes"].append(cls)

        # Create a graph starting with the list of classes
        try:
            graph = MermaidGraph(
                class_names,
                self.env.ref_context.get("py:module"),
                parts=node["parts"],
                private_bases="private-bases" in self.options,
                aliases=self.config.inheritance_alias,
                top_classes=node["top-classes"],
            )
        except InheritanceException as err:
            return [node.document.reporter.warning(err, line=self.lineno)]

        # Create xref nodes for each target of the graph's image map and
        # add them to the doc tree so that Sphinx can resolve the
        # references to real URLs later.  These nodes will eventually be
        # removed from the doctree after we're done with them.
        for name in graph.get_all_class_names():
            refnodes, x = class_role(  # type: ignore
                "class", ":class:`%s`" % name, name, 0, self.state
            )  # type: ignore
            node.extend(refnodes)
        # Store the graph object so we can use it to generate the
        # dot file later
        node["graph"] = graph

        if "caption" not in self.options:
            self.add_name(node)
            return [node]
        else:
            figure = figure_wrapper(self, node, self.options["caption"])
            self.add_name(figure)
            return [figure]


def html_visit_mermaid_inheritance(self: HTMLTranslator, node: inheritance_diagram) -> None:
    """
    Output the graph for HTML.  This will insert a PNG with clickable
    image map.
    """
    graph = node["graph"]

    graph_hash = get_graph_hash(node)
    name = "inheritance%s" % graph_hash

    # Create a mapping from fully-qualified class names to URLs.
    mermaid_output_format = self.builder.env.config.mermaid_output_format.upper()
    current_filename = self.builder.current_docname + self.builder.out_suffix
    urls = {}
    pending_xrefs = cast(Iterable[addnodes.pending_xref], node)
    for child in pending_xrefs:
        if child.get("refuri") is not None:
            if mermaid_output_format == "SVG":
                urls[child["reftitle"]] = "../" + child.get("refuri")
            else:
                urls[child["reftitle"]] = child.get("refuri")
        elif child.get("refid") is not None:
            if mermaid_output_format == "SVG":
                urls[child["reftitle"]] = "../" + current_filename + "#" + child.get("refid")
            else:
                urls[child["reftitle"]] = "#" + child.get("refid")
    dotcode = graph.generate_dot(name, urls, env=self.builder.env)
    render_mm_html(
        self,
        node,
        dotcode,
        {},
        "inheritance",
        "inheritance",
        alt="Inheritance diagram of " + node["content"],
    )
    raise nodes.SkipNode


def latex_visit_mermaid_inheritance(self: LaTeXTranslator, node: inheritance_diagram) -> None:
    """
    Output the graph for LaTeX.  This will insert a PDF.
    """
    graph = node["graph"]

    graph_hash = get_graph_hash(node)
    name = "inheritance%s" % graph_hash

    dotcode = graph.generate_dot(
        name,
        env=self.builder.env,
    )
    #  graph_attrs={'size': '"6.0,6.0"'})
    render_mm_latex(self, node, dotcode, {}, "inheritance")
    raise nodes.SkipNode


def texinfo_visit_mermaid_inheritance(self: TexinfoTranslator, node: inheritance_diagram) -> None:
    """
    Output the graph for Texinfo.  This will insert a PNG.
    """
    graph = node["graph"]

    graph_hash = get_graph_hash(node)
    name = "inheritance%s" % graph_hash

    dotcode = graph.generate_dot(
        name,
        env=self.builder.env,
    )
    #  graph_attrs={'size': '"6.0,6.0"'})
    render_mm_texinfo(self, node, dotcode, {}, "inheritance")
    raise nodes.SkipNode


def setup(app: Sphinx) -> Dict[str, Any]:
    app.setup_extension("mermaid")
    app.add_node(
        mermaid_inheritance,
        latex=(latex_visit_mermaid_inheritance, None),
        html=(html_visit_mermaid_inheritance, None),
        text=(skip, None),
        man=(skip, None),
        texinfo=(texinfo_visit_mermaid_inheritance, None),
    )
    app.add_directive("mermaid-inheritance", MermaidDiagram)
    # app.add_config_value('mermaid_inheritance_graph_attrs', {}, False)
    # app.add_config_value('mermaid_inheritance_node_attrs', {}, False)
    # app.add_config_value('mermaid_inheritance_edge_attrs', {}, False)
    app.add_config_value("inheritance_alias", {}, False)

    return {"version": sphinx.__display_version__, "parallel_read_safe": True}