Function classDirective

tools/ngui/static/js/lib/angular.js:12537–12592

(name, selector)

}];

function classDirective(name, selector) {
  name = 'ngClass' + name;
  return ngDirective(function(scope, element, attr) {
    var oldVal = undefined;

    scope.$watch(attr[name], ngClassWatchAction, true);

    attr.$observe('class', function(value) {
      var ngClass = scope.$eval(attr[name]);
      ngClassWatchAction(ngClass, ngClass);
    });


    if (name !== 'ngClass') {
      scope.$watch('$index', function($index, old$index) {
        var mod = $index & 1;
        if (mod !== old$index & 1) {
          if (mod === selector) {
            addClass(scope.$eval(attr[name]));
          } else {
            removeClass(scope.$eval(attr[name]));
          }
        }
      });
    }


    function ngClassWatchAction(newVal) {
      if (selector === true || scope.$index % 2 === selector) {
        if (oldVal && !equals(newVal,oldVal)) {
          removeClass(oldVal);
        }
        addClass(newVal);
      }
      oldVal = copy(newVal);
    }


    function removeClass(classVal) {
      if (isObject(classVal) && !isArray(classVal)) {
        classVal = map(classVal, function(v, k) { if (v) return k });
      }
      element.removeClass(isArray(classVal) ? classVal.join(' ') : classVal);
    }


    function addClass(classVal) {
      if (isObject(classVal) && !isArray(classVal)) {
        classVal = map(classVal, function(v, k) { if (v) return k });
      }
      if (classVal) {
        element.addClass(isArray(classVal) ? classVal.join(' ') : classVal);
      }
    }
  });
}

/**