misc/batch.js


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if (Drupal.jsEnabled) {
  $(document).ready(function() {
    $('#progress').each(function () {
      var holder = this;
      var uri = Drupal.settings.batch.uri;
      var initMessage = Drupal.settings.batch.initMessage;
      var errorMessage = Drupal.settings.batch.errorMessage;

      // Success: redirect to the summary.
      var updateCallback = function (progress, status, pb) {
        if (progress == 100) {
          pb.stopMonitoring();
          window.location = uri+'&op=finished';
        }
      }

      var errorCallback = function (pb) {
        var div = document.createElement('p');
        div.className = 'error';
        $(div).html(errorMessage);
        $(holder).prepend(div);
        $('#wait').hide();
      }

      var progress = new Drupal.progressBar('updateprogress', updateCallback, "POST", errorCallback);
      progress.setProgress(-1, initMessage);
      $(holder).append(progress.element);
      progress.startMonitoring(uri+'&op=do', 10);
    });
  });
}