live-set/Scheduler.js

Class representing a changing and transformable collection of items.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));

var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));

var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));

var _asap = _interopRequireDefault(require("asap"));

var CAPACITY = 1024;

var Scheduler =
/*#__PURE__*/
function () {
  function Scheduler() {
    (0, _classCallCheck2.default)(this, Scheduler);
    (0, _defineProperty2.default)(this, "_queue", []);
    (0, _defineProperty2.default)(this, "_isFlushing", false);
    (0, _defineProperty2.default)(this, "_index", 0);
  }

  (0, _createClass2.default)(Scheduler, [{
    key: "schedule",
    value: function schedule(cb) {
      var _this = this;

      this._queue.push(function () {
        try {
          cb();
        } catch (e) {
          setTimeout(function () {
            throw e;
          }, 0);
        }
      });

      if (this._queue.length === 1) {
        (0, _asap.default)(function () {
          _this.flush();
        });
      }
    }
  }, {
    key: "flush",
    value: function flush() {
      // based on https://github.com/kriskowal/asap/blob/master/raw.js
      if (this._isFlushing) return;
      this._isFlushing = true;
      var queue = this._queue;

      while (this._index < queue.length) {
        var currentIndex = this._index;
        this._index += 1;
        queue[currentIndex].call();

        if (this._index > CAPACITY) {
          for (var scan = 0, newLength = queue.length - this._index; scan < newLength; scan++) {
            queue[scan] = queue[scan + this._index];
          }

          queue.length -= this._index;
          this._index = 0;
        }
      }

      queue.length = 0;
      this._index = 0;
      this._isFlushing = false;
    }
  }]);
  return Scheduler;
}();

exports.default = Scheduler;
module.exports = exports.default;
module.exports.default = exports.default;
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