Method start

packages/player/src/composition-probe.ts:80–138

Start (or restart) the probe. Stops any previously running probe first.

()

  /** Start (or restart) the probe. Stops any previously running probe first. */
  start(): void {
    this.stop();
    this._runtimeInjected = false;
    let attempts = 0;

    // fallow-ignore-next-line complexity
    this._interval = setInterval(() => {
      attempts++;
      try {
        const win = this._iframe.contentWindow as Window & {
          __player?: { getDuration: () => number };
          __timelines?: Record<string, { duration: () => number }>;
          __hf?: unknown;
        };
        if (!win) return;

        const hasRuntime = !!(win.__hf || win.__player);
        const hasTimelines = !!(win.__timelines && Object.keys(win.__timelines).length > 0);
        const hasNestedCompositions =
          !!this._iframe.contentDocument?.querySelector("[data-composition-src]");

        if (
          shouldInjectRuntime({
            hasRuntime,
            hasTimelines,
            hasNestedCompositions,
            runtimeInjected: this._runtimeInjected,
            attempts,
          })
        ) {
          this._injectRuntime();
          return;
        }

        if (this._runtimeInjected && !hasRuntime) return;

        const adapter = this._resolvePlaybackDurationAdapter(win);
        if (adapter && adapter.getDuration() > 0) {
          this.stop();

          const compositionSize = readCompositionSizeFromDocument(this._iframe.contentDocument);

          this._callbacks.onReady({
            duration: adapter.getDuration(),
            adapter,
            compositionSize,
          });
          return;
        }
      } catch {
        /* cross-origin */
      }

      if (attempts >= 40) {
        this.stop();
        this._callbacks.onError("Composition timeline not found after 8s");
      }
    }, 200);