/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

"use strict";

/**
 * Bug 1922498 - scrolling is broken on www.ilgeniodellapizza.com
 *
 * The site is expecting wheelDeltaY to have the opposite sign, breaking scrolling.
 * We can override the value to flip the sign and scale down the value.
 */

if (!window.__firefoxWebCompatFixBug1922498) {
  Object.defineProperty(window, "__firefoxWebCompatFixBug1922498", {
    configurable: false,
    value: true,
  });

  console.info(
    "wheelDeltaY is being overriden for compatibility reasons. See https://bugzilla.mozilla.org/show_bug.cgi?id=1922498 for details."
  );

  const proto = window.WheelEvent.prototype;
  const descriptor = Object.getOwnPropertyDescriptor(proto, "wheelDeltaY");
  const { get } = descriptor;

  descriptor.get = function () {
    const value = get.call(this);
    return -value / 40;
  };

  Object.defineProperty(proto, "wheelDeltaY", descriptor);
}