smov/src/components/player/display/base.ts

import fscreen from "fscreen";

import {
  DisplayInterface,
  DisplayInterfaceEvents,
} from "@/components/player/display/displayInterface";
import { Source } from "@/components/player/hooks/usePlayer";
import {
  canFullscreen,
  canFullscreenAnyElement,
  canWebkitFullscreen,
} from "@/utils/detectFeatures";
import { makeEmitter } from "@/utils/events";

export function makeVideoElementDisplayInterface(): DisplayInterface {
  const { emit, on, off } = makeEmitter<DisplayInterfaceEvents>();
  let source: Source | null = null;
  let videoElement: HTMLVideoElement | null = null;
  let containerElement: HTMLElement | null = null;
  let isFullscreen = false;

  function setSource() {
    if (!videoElement || !source) return;
    videoElement.src = source.url;
    videoElement.addEventListener("play", () => emit("play", undefined));
    videoElement.addEventListener("pause", () => emit("pause", undefined));
  }

  function fullscreenChange() {
    isFullscreen =
      !!document.fullscreenElement || // other browsers
      !!(document as any).webkitFullscreenElement; // safari
  }
  fscreen.addEventListener("fullscreenchange", fullscreenChange);

  return {
    on,
    off,
    destroy: () => {
      fscreen.removeEventListener("fullscreenchange", fullscreenChange);
    },
    load(newSource) {
      source = newSource;
      setSource();
    },

    processVideoElement(video) {
      videoElement = video;
      setSource();
    },
    processContainerElement(container) {
      containerElement = container;
    },

    pause() {
      videoElement?.pause();
    },
    play() {
      videoElement?.play();
    },
    toggleFullscreen() {
      if (isFullscreen) {
        isFullscreen = false;
        emit("fullscreen", isFullscreen);
        if (!fscreen.fullscreenElement) return;
        fscreen.exitFullscreen();
        return;
      }

      // enter fullscreen
      isFullscreen = true;
      emit("fullscreen", isFullscreen);
      if (!canFullscreen() || fscreen.fullscreenElement) return;
      if (canFullscreenAnyElement()) {
        if (containerElement) fscreen.requestFullscreen(containerElement);
        return;
      }
      if (canWebkitFullscreen()) {
        if (videoElement) (videoElement as any).webkitEnterFullscreen();
      }
    },
  };
}