CocoRoboDesktop/pdf1.js/src/shared/compatibility.js

/* Copyright 2017 Mozilla Foundation
 *
 * 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.
 */
/* globals __non_webpack_require__ */

import { isNodeJS } from "./is_node.js";

// Support: Node.js<16.0.0
(function checkNodeBtoa() {
  if (globalThis.btoa || !isNodeJS) {
    return;
  }
  globalThis.btoa = function (chars) {
    // eslint-disable-next-line no-undef
    return Buffer.from(chars, "binary").toString("base64");
  };
})();

// Support: Node.js<16.0.0
(function checkNodeAtob() {
  if (globalThis.atob || !isNodeJS) {
    return;
  }
  globalThis.atob = function (input) {
    // eslint-disable-next-line no-undef
    return Buffer.from(input, "base64").toString("binary");
  };
})();

// Support: Node.js
(function checkDOMMatrix() {
  if (globalThis.DOMMatrix || !isNodeJS) {
    return;
  }
  globalThis.DOMMatrix = __non_webpack_require__("canvas").DOMMatrix;
})();

// Support: Node.js
(function checkReadableStream() {
  if (globalThis.ReadableStream || !isNodeJS) {
    return;
  }
  globalThis.ReadableStream = __non_webpack_require__(
    "web-streams-polyfill/dist/ponyfill.js"
  ).ReadableStream;
})();

// Support: Firefox<90, Chrome<92, Safari<15.4, Node.js<16.6.0
(function checkArrayAt() {
  if (Array.prototype.at) {
    return;
  }
  require("core-js/es/array/at.js");
})();

// Support: Firefox<90, Chrome<92, Safari<15.4, Node.js<16.6.0
(function checkTypedArrayAt() {
  if (Uint8Array.prototype.at) {
    return;
  }
  require("core-js/es/typed-array/at.js");
})();

// Support: Firefox<94, Chrome<98, Safari<15.4, Node.js<17.0.0
(function checkStructuredClone() {
  if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("IMAGE_DECODERS")) {
    // The current image decoders are synchronous, hence `structuredClone`
    // shouldn't need to be polyfilled for the IMAGE_DECODERS build target.
    return;
  }
  if (globalThis.structuredClone) {
    return;
  }
  require("core-js/web/structured-clone.js");
})();