figure.html

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    http://www.apache.org/licenses/LICENSE-2.0

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<!--
    Uses the HTML <figure> content model, but automatically adds a number to
    the <figcaption>.
-->
<polymer-element name="cxx-figure" constructor="CxxFigureElement">
  <template>
    <style>
      :host { margin-left: auto; margin-right: auto; }
      figcaption { white-space: nowrap; text-align: center; }
      polyfill-next-selector { content: 'figcaption figcaption' }
      ::content figcaption { display: inline; }

    </style>
    <figure>
      <figcaption>Figure {{figure_num}} — <wbr><content select="figcaption"></content></figcaption>
      <content></content>
    </figure>
  </template>
  <script>
    (function() {
      function renumberFigures() {
        document.querySelectorAll('cxx-figure').array().forEach(function(figure, index) {
          figure.figure_num = index + 1;
        });
      }
      Polymer('cxx-figure', {
        domReady: renumberFigures,
        detached: renumberFigures,
      });
    })();
  </script>
</polymer-element>