rxjs-zone-less/esm/internals/animationFrameProvider.js

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

import { Subscription } from 'rxjs';
import { getZoneUnPatchedApi } from './zone-less';
var cancelAnimationFrame = getZoneUnPatchedApi('cancelAnimationFrame');
var requestAnimationFrame = getZoneUnPatchedApi('requestAnimationFrame');
export var animationFrameProvider = {
    // When accessing the delegate, use the variable rather than `this` so that
    // the functions can be called without being bound to the provider.
    schedule: function (callback) {
        var request = requestAnimationFrame;
        var cancel = cancelAnimationFrame;
        var delegate = animationFrameProvider.delegate;
        if (delegate) {
            request = delegate.requestAnimationFrame;
            cancel = delegate.cancelAnimationFrame;
        }
        var handle = request(function (timestamp) {
            // Clear the cancel function. The request has been fulfilled, so
            // attempting to cancel the request upon unsubscription would be
            // pointless.
            cancel = undefined;
            callback(timestamp);
        });
        return new Subscription(function () { return cancel === null || cancel === void 0 ? void 0 : cancel(handle); });
    },
    requestAnimationFrame: function () {
        var args = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            args[_i] = arguments[_i];
        }
        var delegate = animationFrameProvider.delegate;
        return ((delegate === null || delegate === void 0 ? void 0 : delegate.requestAnimationFrame) || requestAnimationFrame).apply(void 0, args);
    },
    cancelAnimationFrame: function () {
        var args = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            args[_i] = arguments[_i];
        }
        var delegate = animationFrameProvider.delegate;
        return ((delegate === null || delegate === void 0 ? void 0 : delegate.cancelAnimationFrame) || cancelAnimationFrame).apply(void 0, args);
    },
};