Add ability to set per-page secondary sidebars

docs/user_guide/page-toc.rst

@@ -24,3 +24,32 @@ Remove the Table of Contents
 
 To remove the Table of Contents, add ``:html_theme.sidebar_secondary.remove:`` to the `file-wide metadata <https://www.sphinx-doc.org/en/master/usage/restructuredtext/field-lists.html#file-wide-metadata>`_ at the top of a page.
 This will remove the Table of Contents from that page only.
+
+Per-page secondary-sidebar content
+----------------------------------
+
+``html_theme_options['secondary_sidebar_items']`` accepts either a ``list`` of secondary sidebar
+templates to render on every page:
+
+.. code-block:: python
+
+   html_theme_options = {
+     "secondary_sidebar_items": ["page-toc", "sourcelink"]
+   }
+
+or a ``dict`` which maps page names to ``list`` of secondary sidebar templates:
+
+.. code-block:: python
+
+   html_theme_options = {
+     "secondary_sidebar_items": {
+       "**": ["page-toc", "sourcelink"],
+       "index": ["page-toc"],
+     }
+   }
+
+If a ``dict`` is specified, the keys can contain glob-style patterns; page names which
+match the pattern will contain the sidebar templates specified. This closely follows the behavior of
+the ``html_sidebars`` option that is part of Sphinx itself, except that it operates on the
+secondary sidebar instead of the primary sidebar. For more information, see `the Sphinx
+documentation <https://www.sphinx-doc.org/en/master/usage/configuration.html#confval-html_sidebars>`__.

src/pydata_sphinx_theme/__init__.py

@@ -203,7 +203,6 @@ def update_and_remove_templates(
         "theme_footer_start",
         "theme_footer_center",
         "theme_footer_end",
-        "theme_secondary_sidebar_items",
         "theme_primary_sidebar_end",
         "sidebars",
     ]
@@ -291,6 +290,7 @@ def setup(app: Sphinx) -> Dict[str, str]:
     app.connect("html-page-context", toctree.add_toctree_functions)
     app.connect("html-page-context", update_and_remove_templates)
     app.connect("html-page-context", logo.setup_logo_path)
+    app.connect("html-page-context", utils.set_secondary_sidebar_items)
     app.connect("build-finished", pygment.overwrite_pygments_css)
     app.connect("build-finished", logo.copy_logo_images)
 

src/pydata_sphinx_theme/theme/pydata_sphinx_theme/sections/sidebar-secondary.html

@@ -1,6 +1,6 @@
-{% if theme_secondary_sidebar_items -%}
+{% if secondary_sidebar_items -%}
 <div class="sidebar-secondary-items sidebar-secondary__inner">
-{% for toc_item in theme_secondary_sidebar_items %}
+{% for toc_item in secondary_sidebar_items %}
   <div class="sidebar-secondary-item">{% include toc_item %}</div>
 {% endfor %}
 </div>

src/pydata_sphinx_theme/utils.py

@@ -1,11 +1,13 @@
 """General helpers for the management of config parameters."""
 
+import copy
+import os
 import re
-from typing import Any, Dict, Iterator
+from typing import Any, Dict, Iterator, List, Union
 
 from docutils.nodes import Node
 from sphinx.application import Sphinx
-from sphinx.util import logging
+from sphinx.util import logging, matching
 
 
 def get_theme_options_dict(app: Sphinx) -> Dict[str, Any]:
@@ -58,3 +60,78 @@ def maybe_warn(app: Sphinx, msg, *args, **kwargs):
     should_warn = theme_options.get("surface_warnings", False)
     if should_warn:
         SPHINX_LOGGER.warning(msg, *args, **kwargs)
+
+
+def set_secondary_sidebar_items(
+    app: Sphinx, pagename: str, templatename: str, context, doctree
+) -> None:
+    """Set the secondary sidebar items to render for the given pagename."""
+    if "theme_secondary_sidebar_items" in context:
+        templates = context["theme_secondary_sidebar_items"]
+        if isinstance(templates, dict):
+            templates = _get_matching_sidebar_items(pagename, templates)
+
+        context["secondary_sidebar_items"] = _update_and_remove_templates(
+            app,
+            context,
+            templates,
+            "theme_secondary_sidebar_items",
+        )
+
+
+def _update_and_remove_templates(
+    app: Sphinx, context, templates: Union[List, str], template_key: str
+) -> List[str]:
+    # Break apart `,` separated strings so we can use , in the defaults
+    if isinstance(templates, str):
+        templates = [ii.strip() for ii in templates.split(",")]
+    # Add `.html` to templates with no suffix
+    suffixed_templates = []
+    for template in templates:
+        if os.path.splitext(template)[1]:
+            suffixed_templates.append(template)
+        else:
+            suffixed_templates.append(f"{template}.html")
+
+    ctx = copy.copy(context)
+    ctx.update({template_key: suffixed_templates})
+
+    # Check whether the template renders to an empty string; remove if this is the case
+    filtered_templates = []
+    for template in suffixed_templates:
+        rendered = app.builder.templates.render(template, ctx)
+        if len(rendered.strip()) != 0:
+            filtered_templates.append(template)
+
+    return filtered_templates
+
+
+def _get_matching_sidebar_items(
+    pagename: str, sidebars: Dict[str, List[str]]
+) -> List[str]:
+    """Get the matching sidebar templates to render for the given pagename.
+
+    This function was adapted from sphinx.builders.html.StandaloneHTMLBuilder.add_sidebars.
+
+    Cached to avoid overhead when html context event is fired multiple times on the same page.
+    """
+    matched = None
+    secondary_sidebar_items = []
+    for pattern, sidebar_items in sidebars.items():
+        if matching.patmatch(pagename, pattern):
+            if matched and _has_wildcard(pattern) and _has_wildcard(matched):
+                SPHINX_LOGGER.warning(
+                    f"Page {pagename} matches two wildcard patterns in secondary_sidebar_items: {matched} and {pattern}"
+                ),
+
+            matched = pattern
+            secondary_sidebar_items = sidebar_items
+    return secondary_sidebar_items
+
+
+def _has_wildcard(pattern: str) -> bool:
+    """Check whether the pattern contains a wildcard.
+
+    Taken from sphinx.builders.StandaloneHTMLBuilder.add_sidebars.
+    """
+    return any(char in pattern for char in "*?[")

tests/sites/sidebars/index.rst

@@ -11,3 +11,8 @@ Sidebar depth variations
    :caption: Caption 2
 
    section2/index
+
+Other content
+-------------
+
+This is some other content.

tests/sites/sidebars/section1/index.rst

@@ -6,3 +6,8 @@ Section 1 index
 
    subsection1/index
    page2
+
+Other Content
+-------------
+
+This is some other content

tests/sites/sidebars/section1/subsection1/page2.rst

@@ -1,2 +1,6 @@
 Section 1 sub 1 page 2
 ======================
+
+
+Section A
+---------

tests/sites/sidebars/section2/index.rst

@@ -5,3 +5,9 @@ Section 2 index
 
    page1
    https://google.com
+
+
+Other Content
+-------------
+
+This is some other content

tests/test_build.py

@@ -986,3 +986,73 @@ def test_translations(sphinx_build_factory) -> None:
     # Search bar
     # TODO: Add translations where there are english phrases below
     assert "Search the docs" in str(index.select(".bd-search")[0])
+
+
+def test_render_secondary_sidebar_list(sphinx_build_factory) -> None:
+    """Test that the secondary sidebar can be built with a list of templates."""
+    confoverrides = {
+        "html_context": {
+            "github_user": "pydata",
+            "github_repo": "pydata-sphinx-theme",
+            "github_version": "main",
+        },
+        "html_theme_options": {
+            "use_edit_page_button": True,
+            "secondary_sidebar_items": ["page-toc", "edit-this-page"],
+        },
+    }
+    sphinx_build = sphinx_build_factory("sidebars", confoverrides=confoverrides)
+    # Basic build with defaults
+    sphinx_build.build()
+
+    # Check that the page-toc template gets rendered
+    assert sphinx_build.html_tree("index.html").select("div.page-toc")
+    assert sphinx_build.html_tree("section1/index.html").select("div.page-toc")
+    assert sphinx_build.html_tree("section2/index.html").select("div.page-toc")
+
+    # Check that the edit-this-page template gets rendered
+    assert sphinx_build.html_tree("index.html").select("div.editthispage")
+    assert sphinx_build.html_tree("section1/index.html").select("div.editthispage")
+    assert sphinx_build.html_tree("section2/index.html").select("div.editthispage")
+
+    # Check that sourcelink is not rendered
+    assert not sphinx_build.html_tree("index.html").select("div.sourcelink")
+    assert not sphinx_build.html_tree("section1/index.html").select("div.sourcelink")
+    assert not sphinx_build.html_tree("section2/index.html").select("div.sourcelink")
+
+
+def test_render_secondary_sidebar_dict(sphinx_build_factory) -> None:
+    """Test that the secondary sidebar can be built with a dict of templates."""
+    confoverrides = {
+        "html_context": {
+            "github_user": "pydata",
+            "github_repo": "pydata-sphinx-theme",
+            "github_version": "main",
+        },
+        "html_theme_options": {
+            "use_edit_page_button": True,
+            "secondary_sidebar_items": {
+                "**": ["page-toc", "edit-this-page"],
+                "section1/index": [],
+                "section2/index": ["sourcelink"],
+            },
+        },
+    }
+    sphinx_build = sphinx_build_factory("sidebars", confoverrides=confoverrides)
+    # Basic build with defaults
+    sphinx_build.build()
+
+    # Check that the page-toc template gets rendered
+    assert sphinx_build.html_tree("index.html").select("div.page-toc")
+    assert not sphinx_build.html_tree("section1/index.html").select("div.page-toc")
+    assert not sphinx_build.html_tree("section2/index.html").select("div.page-toc")
+
+    # Check that the edit-this-page template gets rendered
+    assert sphinx_build.html_tree("index.html").select("div.editthispage")
+    assert not sphinx_build.html_tree("section1/index.html").select("div.editthispage")
+    assert not sphinx_build.html_tree("section2/index.html").select("div.editthispage")
+
+    # Check that sourcelink is not rendered
+    assert not sphinx_build.html_tree("index.html").select("div.sourcelink")
+    assert not sphinx_build.html_tree("section1/index.html").select("div.sourcelink")
+    assert sphinx_build.html_tree("section2/index.html").select("div.sourcelink")