Test theme inheritance on self

docs/_themes/ntd2d/layout.html

@@ -0,0 +1,19 @@
+{% extends "basic/layout.html" %}
+
+{%- block extrahead %}
+  {{ super() }}
+
+  <link rel="stylesheet" href="https://pages.nist.gov/nist-header-footer/css/nist-combined.css">
+  <script src="https://code.jquery.com/jquery-3.6.2.min.js" type="text/javascript" defer="defer"></script>
+  {header_footer_script}
+{% endblock %}
+
+
+{%- block footer %}
+
+  {{ super() }}
+
+  <!-- Taken from https://www.filamentgroup.com/lab/html-includes/#another-demo%3A-including-another-html-file -->
+  <iframe src="{{ pathto('_static/ntd2d_menu.html', 1) }}" onload="this.before((this.contentDocument.body||this.contentDocument).children[0]);this.remove()"></iframe>
+
+{%- endblock %}

docs/_themes/ntd2d/static/ntd2d.css_t

@@ -0,0 +1,78 @@
+@import url("sphinxdoc.css");
+
+
+.dropbtn {
+  position: fixed;
+  right: 20px;
+  bottom: 20px;
+}
+
+.dropdown {
+  position: fixed;
+  display: inline-block;
+  right: 20px;
+  left: auto;
+  width: auto;
+  bottom: 20px;
+  top: auto;
+  height: auto;
+  z-index: 400;
+}
+
+.dropdown-content {
+  display: none;
+  position: relative;
+  background-color: #f1f1f1;
+  min-width: 160px;
+  max-width: 250px;
+  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
+  z-index: 1;
+  right: 0px;
+  left: auto;
+  bottom: 20px;
+  padding-left: 10px;
+  padding-right: 10px;
+  padding-top: 5px;
+  padding-bottom: 5px;
+  font-family: Helvetica;
+  font-size: smaller;
+}
+
+.dropdown-content h2 {
+  color: #707070;
+  font-size: smaller;
+}
+
+.dropdown-content ul {
+  list-style-type: none;
+  margin: 0;
+  padding: 0;
+  overflow: hidden;
+}
+
+.dropdown-content li {
+  float: left;
+}
+
+.dropdown-content li a {
+  color: black;
+/*   padding: 12px 16px; */
+  text-decoration: none;
+  display: block;
+  border-bottom: 0px;
+  text-align: center;
+  padding-left: 6px;
+  padding-right: 6px;
+}
+
+.dropdown-content hr {
+  margin-left: -10px;
+  width: 100%;
+  margin-right: -10px;
+}
+
+.dropdown-content a:hover {text-decoration: underline;}
+
+.dropdown:hover .dropdown-content {display: block;}
+
+.dropdown:hover .dropbtn {background-color: 'ButtonBorder';}

docs/_themes/ntd2d/theme.conf

@@ -0,0 +1,3 @@
+[theme]
+inherit = sphinxdoc
+stylesheet = ntd2d.css

docs/conf.py

@@ -35,7 +35,7 @@
 # -- Options for HTML output -------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
 
-html_theme = 'alabaster'
+html_theme = 'ntd2d'
 html_static_path = ['_static']
 
 html_show_copyright = False