lof.html

<?!= include('lof-loader'); ?>
<script src='https://cdnjs.cloudflare.com/ajax/libs/pdf.js/1.10.81/pdf.js'>
</script>
  
<script>

PDFJS.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/1.10.81/pdf.worker.js'
page_labs = [];

window.onload = google.script.run.withSuccessHandler(countFigures).getDocAsPDF();

function logIt(blob) {
  var pdf = PDFJS.getDocument({data: blob});
  return pdf.then(function(pdf) {
    var max_pages = pdf.pdfInfo.numPages,
        promise_count = [];
    for (var i = 1; i <= max_pages; i++) {
      var page = pdf.getPage(i);
      promise_count.push(page.then(function(page) {
        var text_content = page.getTextContent();
        return text_content.then(function(page){
          return text_content
        });
      }));
    }
  
    // Wait for all pages and sum counts
  
    return Promise.all(promise_count).then(function (page_counts) {
      var final_page_count = [];
      for (var j = 0; j < page_counts.length; j++) {
        var page_as_string = JSON.stringify(page_counts[j]);
        final_page_count.push(page_as_string.split('☙').length - 1)
      }
      return final_page_count;
    });
  });
}

function countFigures(blob) {
  logIt(blob).then(function (count) {
    google.script.run.withSuccessHandler(restoreLabels).insertLoFNumbers(count);   
  });
}


function restoreLabels() {
  google.script.run.withSuccessHandler(closeDialog).restoreLabels();
}

function closeDialog() {
  google.script.host.close();
}
</script>