rxjs-zone-less/esm/scheduler/animation-frame/AnimationFrameAction.js

A set of wrappers for RxJS to avoid unnecessary change detection and zone interference in Angular.

import { __extends } from "tslib";
import { animationFrameProvider } from '../../internals/animationFrameProvider';
import { AsyncAction } from '../async/AsyncAction';
var AnimationFrameAction = /** @class */ (function (_super) {
    __extends(AnimationFrameAction, _super);
    function AnimationFrameAction(scheduler, work) {
        var _this = _super.call(this, scheduler, work) || this;
        _this.scheduler = scheduler;
        _this.work = work;
        return _this;
    }
    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 = animationFrameProvider.requestAnimationFrame(function () {
                return scheduler.flush(undefined);
            })));
    };
    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.some(function (action) { return action.id === id; })) {
            animationFrameProvider.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));
export { AnimationFrameAction };