text: var __extends = (this && this.__extends) || function (d, b) {
      for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
      function __() { this.constructor = d; }
      d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
  };
  import { AsyncAction } from './AsyncAction';
  import { AnimationFrame } from '../util/AnimationFrame';
  /**
   * We need this JSDoc comment for affecting ESDoc.
   * @ignore
   * @extends {Ignored}
   */
  export var AnimationFrameAction = (function (_super) {
      __extends(AnimationFrameAction, _super);
      function AnimationFrameAction(scheduler, work) {
          _super.call(this, scheduler, work);
          this.scheduler = scheduler;
          this.work = work;
      }
      AnimationFrameAction.prototype.requestAsyncId = function (scheduler, id, delay) {
          if (delay === void 0) { delay = 0; }
          // If delay is greater than 0, request as an async action.
          if (delay !== null && delay > 0) {
              return _super.prototype.requestAsyncId.call(this, scheduler, id, delay);
          }
          // Push the action to the end of the scheduler queue.
          scheduler.actions.push(this);
          // If an animation frame has already been requested, don't request another
          // one. If an animation frame hasn't been requested yet, request one. Return
          // the current animation frame request id.
          return scheduler.scheduled || (scheduler.scheduled = AnimationFrame.requestAnimationFrame(scheduler.flush.bind(scheduler, null)));
      };
      AnimationFrameAction.prototype.recycleAsyncId = function (scheduler, id, delay) {
          if (delay === void 0) { delay = 0; }
          // If delay exists and is greater than 0, or if the delay is null (the
          // action wasn't rescheduled) but was originally scheduled as an async
          // action, then recycle as an async action.
          if ((delay !== null && delay > 0) || (delay === null && this.delay > 0)) {
              return _super.prototype.recycleAsyncId.call(this, scheduler, id, delay);
          }
          // If the scheduler queue is empty, cancel the requested animation frame and
          // set the scheduled flag to undefined so the next AnimationFrameAction will
          // request its own.
          if (scheduler.actions.length === 0) {
              AnimationFrame.cancelAnimationFrame(id);
              scheduler.scheduled = undefined;
          }
          // Return undefined so the action knows to request a new async id if it's rescheduled.
          return undefined;
      };
      return AnimationFrameAction;
  }(AsyncAction));
  //# sourceMappingURL=AnimationFrameAction.js.map