Patch layout.html to support Sphinx 8

Author: Jonathan Visser

docs/_templates/layout.html

@@ -28,26 +28,22 @@
   {%- endblock -%}
 
   {#- CSS #}
-  {%- if sphinx_version_info < (4, 0) -%}
-    <link rel="stylesheet" href="{{ pathto('_static/' + style, 1) }}" type="text/css" />
-    <link rel="stylesheet" href="{{ pathto('_static/pygments.css', 1) }}" type="text/css" />
-  {%- endif %}
-  {%- if theme_analytics_id %}
-    <link rel="stylesheet" href="{{ pathto('_static/cookieconsent.css', 1) }}" type="text/css" />
-  {%- endif %}
-  {%- for css in css_files %}
-    {%- if css|attr("rel") %}
-      <link rel="{{ css.rel }}" href="{{ pathto(css.filename, 1) }}" type="text/css"{% if css.title is not none %} title="{{ css.title }}"{% endif %} />
+  {%- for css_file in css_files %}
+    {%- if css_file|attr("filename") %}
+      {{ css_tag(css_file) }}
     {%- else %}
-      {%- if css.filename.startswith('https://') %}
-        <link rel="stylesheet" href="{{ css.filename }}" type="text/css" />
-      {%- else %}
-        <link rel="stylesheet" href="{{ pathto(css.filename, 1) }}" type="text/css" />
-      {%- endif %}
+      <link rel="stylesheet" href="{{ pathto(css_file, 1)|escape }}" type="text/css" />
     {%- endif %}
   {%- endfor %}
-  {%- for cssfile in extra_css_files %}
-    <link rel="stylesheet" href="{{ pathto(cssfile, 1) }}" type="text/css" />
+
+  {#
+      "extra_css_files" is an undocumented Read the Docs theme specific option.
+      There is no need to check for ``|attr("filename")`` here because it's always a string.
+      Note that this option should be removed in favor of regular ``html_css_files``:
+      https://www.sphinx-doc.org/en/master/usage/configuration.html#confval-html_css_files
+  #}
+  {%- for css_file in extra_css_files %}
+    <link rel="stylesheet" href="{{ pathto(css_file, 1)|escape }}" type="text/css" />
   {%- endfor -%}
 
   {#- FAVICON #}