text: /* Copyright 2013-2016 Extended Mind Technologies Oy
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
   'use strict';
  
   function inputModelValidatorDirective() {
    return {
      restrict: 'A',
      require: 'ngModel', // get a hold of NgModelController
      link: function(_, element, __, ngModel) {
  
        /*
        * Validate non-whitespace model value string.
        */
        ngModel.$validators.validNonWhiteSpaceString = function(modelValue, viewValue) {
          var value = modelValue || viewValue;
          return value && value.trim() !== '';
        };
  
        // Cancel an update and reset the input element's value to prevent an update to the $modelValue.
        element[0].addEventListener('blur', ngModel.$rollbackViewValue);
      }
    };
  }
  angular.module('common').directive('inputModelValidator', inputModelValidatorDirective);
  