rx-player/src/compat/eme/custom_media_keys/webkit_media_keys_constructor.ts

Canal+ HTML5 Video Player

/**
 * Copyright 2015 CANAL+ Group
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import globalScope from "../../../utils/global_scope";
import type { IMediaElement } from "../../browser_compatibility_types";

type IWebKitMediaKeys = unknown;

interface IWebKitMediaKeysConstructor {
  new (keySystem: string): IWebKitMediaKeys;
  isTypeSupported: (keyType: string) => boolean;
}

export default function getWebKitMediaKeysConstructor():
  | undefined
  | IWebKitMediaKeysConstructor {
  const { WebKitMediaKeys } = globalScope as typeof globalThis & {
    WebKitMediaKeys?: IWebKitMediaKeysConstructor;
  };

  if (
    WebKitMediaKeys !== undefined &&
    typeof WebKitMediaKeys.isTypeSupported === "function" &&
    // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
    typeof WebKitMediaKeys.prototype.createSession === "function" &&
    typeof (HTMLMediaElement.prototype as IMediaElement).webkitSetMediaKeys === "function"
  ) {
    return WebKitMediaKeys;
  }
  return undefined;
}

export type { IWebKitMediaKeys };