@checksub_team/peaks_timeline/src/invoker.js

JavaScript UI component for displaying audio waveforms

/**
 * @file
 *
 * Defines the {@link invoker} class.
 *
 * @module invoker
 */

 define([
  ], function() {
    'use strict';

    /**
     * An invoker class for throttling.
     *
     * @class
     * @alias Invoker
     */

    function Invoker() {
      this._throttledFunc = {};
    }

    Invoker.prototype.throttle = function(id, func, wait) {
      var self = this;

      if (this._throttledFunc[id]) {
          // Already limiting
          this._throttledFunc[id].func = func;
          this._throttledFunc[id].continue = true;
      }
      else {
          // Create a limit
          this._throttledFunc[id] = {
              func: func,
              timer: null,
              continue: true
          };

          this._throttledFunc[id].timer = setInterval(function() {
              if (self._throttledFunc[id].continue) {
                  func();
                  self._throttledFunc[id].continue = false;
              }
              else {
                  clearInterval(self._throttledFunc[id].timer);
                  delete self._throttledFunc[id];
              }
          }, wait);
      }
    };

    Invoker.prototype.debounce = function(func, wait, immediate) {
      var timeout;

      return function executedFunction() {
        // eslint-disable-next-line consistent-this
        var _self = this;
        var args = arguments;

        function later() {
          timeout = null;
          if (!immediate) {
            func.apply(_self, args);
          }
        }

        var callNow = immediate && !timeout;

        clearTimeout(timeout);

        timeout = setTimeout(later, wait);

        if (callNow) {
          func.apply(_self, args);
        }
      };
    };

    return Invoker;
});