[singlehtml] Reformat fignum and secnum tuple

Format as ``/docname/#id`` to match other parts.

Author: gastmaier

sphinx/builders/singlehtml.py

@@ -128,7 +128,7 @@ def assemble_toc_secnumbers(self) -> dict[str, dict[str, tuple[int, ...]]]:
         new_secnumbers: dict[str, tuple[int, ...]] = {}
         for docname, secnums in self.env.toc_secnumbers.items():
             for id, secnum in secnums.items():
-                alias = f'{docname}/{id}'
+                alias = f'/{docname}/{id}'
                 new_secnumbers[alias] = secnum
 
         return {self.config.root_doc: new_secnumbers}
@@ -149,9 +149,10 @@ def assemble_toc_fignumbers(
         # {'foo': {'figure': {'id2': (2,), 'id1': (1,)}}, 'bar': {'figure': {'id1': (3,)}}}
         for docname, fignumlist in self.env.toc_fignumbers.items():
             for figtype, fignums in fignumlist.items():
-                alias = f'{docname}/{figtype}'
+                alias = f'/{docname}/#{figtype}'
                 new_fignumbers.setdefault(alias, {})
                 for id, fignum in fignums.items():
+                    id = f'/{docname}/#{id}'
                     new_fignumbers[alias][id] = fignum
 
         return {self.config.root_doc: new_fignumbers}

sphinx/writers/html5.py

@@ -395,10 +395,10 @@ def get_secnumber(self, node: Element) -> tuple[int, ...] | None:
         if isinstance(node.parent, nodes.section):
             if self.builder.name == 'singlehtml':
                 docname = self.docnames[-1]
-                anchorname = f'{docname}/#{node.parent["ids"][0]}'
+                anchorname = node.parent['ids'][0]
                 if anchorname not in self.builder.secnumbers:
                     # try first heading which has no anchor
-                    anchorname = f'{docname}/'
+                    anchorname = '/' + docname + '/'
             else:
                 anchorname = '#' + node.parent['ids'][0]
                 if anchorname not in self.builder.secnumbers:
@@ -420,7 +420,7 @@ def add_secnumber(self, node: Element) -> None:
     def add_fignumber(self, node: Element) -> None:
         def append_fignumber(figtype: str, figure_id: str) -> None:
             if self.builder.name == 'singlehtml':
-                key = f'{self.docnames[-1]}/{figtype}'
+                key = f'/{self.docnames[-1]}/#{figtype}'
             else:
                 key = figtype