Unify some datatable utility code

httpdocs/js/datatable_utils.js

@@ -0,0 +1,46 @@
+// 2016 - ntop.org
+
+function datatableRemoveEmptyRow(table) {
+  $("tbody tr.emptyRow", $(table)).remove();
+}
+
+function datatableAddEmptyRow(table, empty_str) {
+  $("tbody", $(table)).html('<tr class="emptyRow"><td colspan="3"><i>' + empty_str + '</i></td></tr>');
+}
+
+function datatableIsEmpty(table) {
+  return $("tr:not(.emptyRow)", $(table)).length == 1;
+}
+
+function datatableGetByForm(form) {
+  return $("table", $("#dt-top-details", $(form)).parent())
+}
+
+function datatableUndoAddRow(new_row, empty_str, bt_to_enable) {
+  if (bt_to_enable)
+     $(bt_to_enable).removeAttr("disabled");
+
+  var form = $(new_row).closest("form");
+  $(new_row).remove();
+  aysUpdateForm(form);
+  var dt = datatableGetByForm(form);
+
+  if (datatableIsEmpty(dt))
+     datatableAddEmptyRow(dt, empty_str);
+}
+
+function datatableForEachRow(table, callbacks) {
+   $("tr:not(:first)", table).each(function(row_i) {
+      if(typeof callbacks === 'function') {
+         callbacks.bind(this)(row_i);
+      } else {
+         var i;
+         for (i=0; i<callbacks.length; i++)
+            callbacks[i].bind(this)(row_i);
+      }
+   });
+}
+
+function datatableAddDeleteButtonCallback(td_idx, callback_str, label) {
+   $("td:nth-child("+td_idx+")", $(this)).html('<a href="javascript:void(0)" class="add-on" onclick="' + callback_str + '" role="button"><span class="label label-danger">' + label + '</span></a>');
+}