emory-libraries/dlp-selfdeposit

<% if display_media_download_link?(file_set: file_set) %>
  <div class="fileset-pdf-viewer">
      <h2 class="sr-only"><%= t('hyrax.file_set.show.downloadable_content.heading') %></h2>
      <iframe id="pdf-viewer" width="100%" height="600px" frameborder="0"
            scrolling="no" marginheight="0" marginwidth="0"
            title="PDF Document" src="/pdfjs/web/viewer.html?file=<%= download_path(file_set) %>"></iframe>
    </div>
<% else %>
    <div>
      <%= image_tag thumbnail_url(file_set),
                    class: "representative-media",
                    alt: "",
                    role: "presentation" %>
    </div>
<% end %>