environment.py 文件源码

def process_refonly_bullet_lists(self, docname, doctree):
        """Change refonly bullet lists to use compact_paragraphs.

        Specifically implemented for 'Indices and Tables' section, which looks
        odd when html_compact_lists is false.
        """
        if self.config.html_compact_lists:
            return

        class RefOnlyListChecker(nodes.GenericNodeVisitor):
            """Raise `nodes.NodeFound` if non-simple list item is encountered.

            Here 'simple' means a list item containing only a paragraph with a
            single reference in it.
            """

            def default_visit(self, node):
                raise nodes.NodeFound

            def visit_bullet_list(self, node):
                pass

            def visit_list_item(self, node):
                children = []
                for child in node.children:
                    if not isinstance(child, nodes.Invisible):
                        children.append(child)
                if len(children) != 1:
                    raise nodes.NodeFound
                if not isinstance(children[0], nodes.paragraph):
                    raise nodes.NodeFound
                para = children[0]
                if len(para) != 1:
                    raise nodes.NodeFound
                if not isinstance(para[0], addnodes.pending_xref):
                    raise nodes.NodeFound
                raise nodes.SkipChildren

            def invisible_visit(self, node):
                """Invisible nodes should be ignored."""
                pass

        def check_refonly_list(node):
            """Check for list with only references in it."""
            visitor = RefOnlyListChecker(doctree)
            try:
                node.walk(visitor)
            except nodes.NodeFound:
                return False
            else:
                return True

        for node in doctree.traverse(nodes.bullet_list):
            if check_refonly_list(node):
                for item in node.traverse(nodes.list_item):
                    para = item[0]
                    ref = para[0]
                    compact_para = addnodes.compact_paragraph()
                    compact_para += ref
                    item.replace(para, compact_para)