Function formDirectiveFactory

code/songhop/www/lib/angular/angular.js:18522–18589

(isNgForm)

 *                       related scope, under this name.
 */
var formDirectiveFactory = function(isNgForm) {
  return ['$timeout', function($timeout) {
    var formDirective = {
      name: 'form',
      restrict: isNgForm ? 'EAC' : 'E',
      controller: FormController,
      compile: function ngFormCompile(formElement) {
        // Setup initial state of the control
        formElement.addClass(PRISTINE_CLASS).addClass(VALID_CLASS);

        return {
          pre: function ngFormPreLink(scope, formElement, attr, controller) {
            // if `action` attr is not present on the form, prevent the default action (submission)
            if (!('action' in attr)) {
              // we can't use jq events because if a form is destroyed during submission the default
              // action is not prevented. see #1238
              //
              // IE 9 is not affected because it doesn't fire a submit event and try to do a full
              // page reload if the form was destroyed by submission of the form via a click handler
              // on a button in the form. Looks like an IE9 specific bug.
              var handleFormSubmission = function(event) {
                scope.$apply(function() {
                  controller.$commitViewValue();
                  controller.$setSubmitted();
                });

                event.preventDefault();
              };

              addEventListenerFn(formElement[0], 'submit', handleFormSubmission);

              // unregister the preventDefault listener so that we don't not leak memory but in a
              // way that will achieve the prevention of the default action.
              formElement.on('$destroy', function() {
                $timeout(function() {
                  removeEventListenerFn(formElement[0], 'submit', handleFormSubmission);
                }, 0, false);
              });
            }

            var parentFormCtrl = controller.$$parentForm,
                alias = controller.$name;

            if (alias) {
              setter(scope, alias, controller, alias);
              attr.$observe(attr.name ? 'name' : 'ngForm', function(newValue) {
                if (alias === newValue) return;
                setter(scope, alias, undefined, alias);
                alias = newValue;
                setter(scope, alias, controller, alias);
                parentFormCtrl.$$renameControl(controller, alias);
              });
            }
            formElement.on('$destroy', function() {
              parentFormCtrl.$removeControl(controller);
              if (alias) {
                setter(scope, alias, undefined, alias);
              }