pdfjs-dist/lib/web/download_manager.js

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2020 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.
 *
 * @licend The above is the entire license notice for the
 * Javascript code in this page
 */
"use strict";

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

var _pdf = require("../pdf");

var _viewer_compatibility = require("./viewer_compatibility.js");

;
const DISABLE_CREATE_OBJECT_URL = _viewer_compatibility.viewerCompatibilityParams.disableCreateObjectURL || false;

function download(blobUrl, filename) {
  const a = document.createElement("a");

  if (!a.click) {
    throw new Error('DownloadManager: "a.click()" is not supported.');
  }

  a.href = blobUrl;
  a.target = "_parent";

  if ("download" in a) {
    a.download = filename;
  }

  (document.body || document.documentElement).appendChild(a);
  a.click();
  a.remove();
}

class DownloadManager {
  constructor({
    disableCreateObjectURL = DISABLE_CREATE_OBJECT_URL
  }) {
    this.disableCreateObjectURL = disableCreateObjectURL;
  }

  downloadUrl(url, filename) {
    if (!(0, _pdf.createValidAbsoluteUrl)(url, "http://example.com")) {
      return;
    }

    download(url + "#pdfjs.action=download", filename);
  }

  downloadData(data, filename, contentType) {
    if (navigator.msSaveBlob) {
      navigator.msSaveBlob(new Blob([data], {
        type: contentType
      }), filename);
      return;
    }

    const blobUrl = (0, _pdf.createObjectURL)(data, contentType, this.disableCreateObjectURL);
    download(blobUrl, filename);
  }

  download(blob, url, filename) {
    if (navigator.msSaveBlob) {
      if (!navigator.msSaveBlob(blob, filename)) {
        this.downloadUrl(url, filename);
      }

      return;
    }

    if (this.disableCreateObjectURL) {
      this.downloadUrl(url, filename);
      return;
    }

    const blobUrl = URL.createObjectURL(blob);
    download(blobUrl, filename);
  }

}

exports.DownloadManager = DownloadManager;