{# Rubin Observatory page footer, rendered through the theme's footer_start
   slot in place of the default copyright/sphinx-version/theme-version
   components. Contains the site's citations, then the footer every Rubin
   guide shares: the project link inventory, the copyright statement, the
   agency funding statement, and the funding-partner logo lineup. #}
<div class="rubin-footer">
  {# The works this site asks to be cited as: every [[project.citations]]
     entry in documenteer.toml whose in_footer is set, in the order the file
     declares them. in_footer defaults to true for the entry filling either
     role -- the site's preferred citation and the `self` entry, which are
     the same entry unless the site marks them separately -- and to false for
     the rest, so the entries the site is about are here without saying so
     twice.

     A site published with a DOI is that DOI's landing page, and DataCite asks
     a landing page to show a full bibliographic citation with the DOI as a
     resolvable link -- putting it in the footer is what makes every page of
     the site such a landing page, not only the one that carries a
     citation-card directive. That is why the `self` entry defaults in on its
     own account: a site that asks readers to cite some other work still owes
     the reader the citation of the DOI it is the landing page of, so such a
     site shows both by default and opts one out explicitly if it wants one.

     Everything here comes from the html_context the guide preset composes
     (documenteer.citations), including the split of the citation text at the
     link: this template never composes a citation. A site that declares no
     citations leaves documenteer_citations unset, and no entry with
     in_footer leaves the list empty, so the block is absent either way.

     Every interpolated value is escaped explicitly, because Sphinx's Jinja
     environment does not autoescape and a citation's fields are free text
     from documenteer.toml -- a title with an ampersand in it is ordinary. #}
  {%- set footer_citations = (documenteer_citations or []) | selectattr("in_footer") | list %}
  {%- if footer_citations %}
  <section class="rubin-footer__citations" aria-labelledby="rubin-footer-citations-title">
    <p class="rubin-footer__citations-title" id="rubin-footer-citations-title">How to cite</p>
    {%- for citation in footer_citations %}
    <div class="rubin-footer__citation">
      {%- if citation.label %}
      <p class="rubin-footer__citation-label">{{ citation.label|e }}</p>
      {%- endif %}
      <p class="rubin-footer__citation-text">{{ citation.plain_text_lead|e
        }}{% if citation.plain_text_url %}<a href="{{ citation.plain_text_url|e }}">{{ citation.plain_text_url|e }}</a>{% endif %}</p>
      {#- The BibTeX entry, offered to be copied rather than downloaded, the
          way GitHub, Zenodo, and ADS offer one: a reader pastes it into a .bib
          file they already keep, and one composed entry feeding one rendering
          cannot drift the way a generated file can. The <pre> holds the only
          copy of it, so rubin-citation-copy.js reads the text from there
          rather than from a duplicated data- payload, and the entry stays
          selectable on a page whose script never runs. The card the
          citation-card directive renders carries the same markup, under its
          own block class, so the two surfaces read identically.

          Nothing may separate <pre><code> from the entry: whitespace inside a
          <pre> is content, and a stray newline is a leading blank line in
          what the reader copies. #}
      {%- if citation.bibtex %}
      <details class="rubin-footer__citation-bibtex">
        <summary class="rubin-footer__citation-bibtex-summary">BibTeX</summary>
        <pre class="rubin-footer__citation-bibtex-entry"><code>{{ citation.bibtex|e }}</code></pre>
        <button type="button" class="rubin-footer__citation-copy">Copy BibTeX</button>
        <span class="rubin-footer__citation-copy-status" role="status" aria-live="polite"></span>
      </details>
      {%- endif %}
      {%- if citation.note %}
      <p class="rubin-footer__citation-note">{{ citation.note|e }}</p>
      {%- endif %}
    </div>
    {%- endfor %}
  </section>
  {# The rule closes the site's own half of the footer. Everything below it --
     the Rubin Observatory links, the copyright, the funding statement, and
     the partner logos -- is the same on every guide, so the reader can see
     where this site stops speaking for itself. It is a real separator rather
     than a border on a neighbour because that is what it means, and it lives
     inside this if-block so a guide that declares no citations has nothing to
     separate and renders no rule. #}
  <hr class="rubin-footer__rule" />
  {%- endif %}

  <nav class="rubin-footer__nav" aria-label="Rubin Observatory">
    <div class="rubin-footer__nav-column">
      <p class="rubin-footer__nav-title">
        <a href="https://rubinobservatory.org/">Rubin Observatory</a>
      </p>
      <ul class="rubin-footer__nav-list">
        <li><a href="https://rubinobservatory.org/for-scientists">For scientists</a></li>
        <li><a href="https://rubinobservatory.org/news">News</a></li>
      </ul>
    </div>
    <div class="rubin-footer__nav-column">
      <p class="rubin-footer__nav-title">
        <a href="https://www.lsst.io">Documentation</a>
      </p>
    </div>
    <div class="rubin-footer__nav-column">
      <p class="rubin-footer__nav-title">
        <a href="https://data.lsst.cloud">data.lsst.cloud</a>
      </p>
    </div>
    <div class="rubin-footer__nav-column">
      <p class="rubin-footer__nav-title">
        <a href="https://community.lsst.org">Community forum</a>
      </p>
    </div>
  </nav>

  {% if show_copyright and copyright %}
  <p class="rubin-footer__copyright">
    {% trans copyright=copyright|e %}© Copyright {{ copyright }}.{% endtrans %}
  </p>
  {% endif %}

  <div class="rubin-footer__funding">
    <p>
      The U.S. National Science Foundation (<a href="https://www.nsf.gov/">NSF</a>)
      and the U.S. Department of Energy (<a href="https://www.energy.gov/">DOE</a>)
      Office of Science will support Rubin Observatory in its operations phase to
      carry out the Legacy Survey of Space and Time. They will also provide support
      for scientific research with the data. During operations, NSF funding is
      managed by the Association of Universities for Research in Astronomy
      (<a href="https://www.aura-astronomy.org/">AURA</a>) under a cooperative
      agreement with NSF, and DOE funding is managed by SLAC National Accelerator
      Laboratory (<a href="https://www6.slac.stanford.edu/">SLAC</a>), under
      contract by DOE. Rubin Observatory is operated by
      <a href="https://noirlab.edu/public/">NSF NOIRLab</a> and SLAC.
    </p>
    <p>
      NSF is an independent federal agency created by Congress in 1950 to promote
      the progress of science. NSF supports basic research and people to create
      knowledge that transforms the future.
    </p>
    <p>
      The DOE Office of Science is the single largest supporter of basic research
      in the physical sciences in the United States and is working to address some
      of the most pressing challenges of our time.
    </p>
  </div>

  <div class="rubin-footer__partner-logos">
    <img
      src="{{ pathto('_static/rubin-partners.png', 1) }}"
      alt="Logos of the Vera C. Rubin Observatory, NSF, US DOE, NOIRLab, AURA, and SLAC."
    />
  </div>
</div>