Function animationRunner

test/angular/1.2/angular-animate.js:401–541

(element, animationEvent, className)

      }

      function animationRunner(element, animationEvent, className) {
        //transcluded directives may sometimes fire an animation using only comment nodes
        //best to catch this early on to prevent any animation operations from occurring
        var node = element[0];
        if(!node) {
          return;
        }

        var isSetClassOperation = animationEvent == 'setClass';
        var isClassBased = isSetClassOperation ||
                           animationEvent == 'addClass' ||
                           animationEvent == 'removeClass';

        var classNameAdd, classNameRemove;
        if(angular.isArray(className)) {
          classNameAdd = className[0];
          classNameRemove = className[1];
          className = classNameAdd + ' ' + classNameRemove;
        }

        var currentClassName = element.attr('class');
        var classes = currentClassName + ' ' + className;
        if(!isAnimatableClassName(classes)) {
          return;
        }

        var beforeComplete = noop,
            beforeCancel = [],
            before = [],
            afterComplete = noop,
            afterCancel = [],
            after = [];

        var animationLookup = (' ' + classes).replace(/\s+/g,'.');
        forEach(lookup(animationLookup), function(animationFactory) {
          var created = registerAnimation(animationFactory, animationEvent);
          if(!created && isSetClassOperation) {
            registerAnimation(animationFactory, 'addClass');
            registerAnimation(animationFactory, 'removeClass');
          }
        });

        function registerAnimation(animationFactory, event) {
          var afterFn = animationFactory[event];
          var beforeFn = animationFactory['before' + event.charAt(0).toUpperCase() + event.substr(1)];
          if(afterFn || beforeFn) {
            if(event == 'leave') {
              beforeFn = afterFn;
              //when set as null then animation knows to skip this phase
              afterFn = null;
            }
            after.push({
              event : event, fn : afterFn
            });
            before.push({
              event : event, fn : beforeFn
            });
            return true;