summaryrefslogtreecommitdiffstats
path: root/browser/extensions/pictureinpicture/video-wrappers/videojsWrapper.js
blob: 2e94c58f4e5eb62009726d84716844fc3bf3ac22 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
/* 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";

// This wrapper supports multiple sites that use video.js player
class PictureInPictureVideoWrapper {
  setCaptionContainerObserver(video, updateCaptionsFunction) {
    let container = document.querySelector(".vjs-text-track-display");

    if (container) {
      updateCaptionsFunction("");
      const callback = function () {
        let text = container.querySelector("div").innerText;
        if (!text) {
          updateCaptionsFunction("");
          return;
        }

        updateCaptionsFunction(text);
      };

      // immediately invoke the callback function to add subtitles to the PiP window
      callback([1], null);

      let captionsObserver = new MutationObserver(callback);

      captionsObserver.observe(container, {
        attributes: false,
        childList: true,
        subtree: true,
      });
    }
  }
}

this.PictureInPictureVideoWrapper = PictureInPictureVideoWrapper;