hextra/layouts/_partials/scripts/asciinema.html

{{- /* Asciinema */ -}}

{{- $asciinemaBase := "" -}}
{{- $useDefaultCdn := true -}}
{{- with site.Params.asciinema.base -}}
  {{- $asciinemaBase = . -}}
  {{- $useDefaultCdn = false -}}
{{- end -}}

{{- $asciinemaJsAsset := "" -}}
{{- with site.Params.asciinema.js -}}
  {{- $asciinemaJsAsset = . -}}
{{- end -}}

{{- $asciinemaCssAsset := "" -}}
{{- with site.Params.asciinema.css -}}
  {{- $asciinemaCssAsset = . -}}
{{- end -}}

{{- /* If only js/css is set without base, use local asset loading */ -}}
{{- if and $useDefaultCdn (or (ne $asciinemaJsAsset "") (ne $asciinemaCssAsset "")) -}}
  {{- $useDefaultCdn = false -}}
{{- end -}}

{{- /* Set default CDN base if needed */ -}}
{{- if $useDefaultCdn -}}
  {{- $asciinemaBase = "https://cdn.jsdelivr.net/npm/asciinema-player@latest/dist/bundle" -}}
{{- end -}}

{{- $isRemoteBase := or (strings.HasPrefix $asciinemaBase "http://") (strings.HasPrefix $asciinemaBase "https://") -}}
{{- $minSuffix := cond hugo.IsProduction ".min" "" -}}

{{- /* CSS retrieval: get raw CSS from either local asset or remote, then process */ -}}
{{- if $isRemoteBase -}}
  {{- $cssPath := cond (ne $asciinemaCssAsset "") $asciinemaCssAsset "asciinema-player.css" -}}
  {{- $asciinemaCssUrl := printf "%s/%s" $asciinemaBase $cssPath -}}
  {{- with try (resources.GetRemote $asciinemaCssUrl) -}}
    {{- with .Err -}}
      {{- errorf "Could not retrieve Asciinema css file from %s. Reason: %s." $asciinemaCssUrl . -}}
    {{- else with .Value -}}
      {{- with resources.Copy "css/asciinema-player.css" . -}}
        {{- $asciinemaCss := . | fingerprint -}}
        <link rel="stylesheet" href="{{ $asciinemaCss.RelPermalink }}" integrity="{{ $asciinemaCss.Data.Integrity }}" crossorigin="anonymous" />
      {{- end -}}
    {{- end -}}
  {{- end -}}
{{- else if $asciinemaCssAsset -}}
  {{- with resources.Get $asciinemaCssAsset -}}
    {{- $asciinemaCss := . | fingerprint -}}
    <link rel="stylesheet" href="{{ $asciinemaCss.RelPermalink }}" integrity="{{ $asciinemaCss.Data.Integrity }}" crossorigin="anonymous" />
  {{- else -}}
    {{- errorf "Asciinema css asset not found at %q" $asciinemaCssAsset -}}
  {{- end -}}
{{- end -}}

{{- /* JS retrieval: get raw JS from either local asset or remote, then process */ -}}
{{- if $isRemoteBase -}}
  {{- $jsPath := cond (ne $asciinemaJsAsset "") $asciinemaJsAsset (printf "asciinema-player%s.js" $minSuffix) -}}
  {{- $asciinemaJsUrl := printf "%s/%s" $asciinemaBase $jsPath -}}
  {{- with try (resources.GetRemote $asciinemaJsUrl) -}}
    {{- with .Err -}}
      {{- errorf "Could not retrieve Asciinema js file from %s. Reason: %s." $asciinemaJsUrl . -}}
    {{- else with .Value -}}
      {{- with resources.Copy (printf "js/asciinema-player%s.js" $minSuffix) . -}}
        {{- $asciinemaJs := . | fingerprint -}}
        <script defer src="{{ $asciinemaJs.RelPermalink }}" integrity="{{ $asciinemaJs.Data.Integrity }}" crossorigin="anonymous"></script>
      {{- end -}}
    {{- end -}}
  {{- end -}}
{{- else if $asciinemaJsAsset -}}
  {{- with resources.Get $asciinemaJsAsset -}}
    {{- $asciinemaJs := . | fingerprint -}}
    <script defer src="{{ $asciinemaJs.RelPermalink }}" integrity="{{ $asciinemaJs.Data.Integrity }}" crossorigin="anonymous"></script>
  {{- else -}}
    {{- errorf "Asciinema js asset not found at %q" $asciinemaJsAsset -}}
  {{- end -}}
{{- end -}}

<script data-playback-time="{{ (T "playbackTime") | default "Playback time" }}">
  const playbackTimeLabel =
    document.currentScript?.getAttribute("data-playback-time") || "Playback time";

  document.addEventListener("DOMContentLoaded", () => {
    const observers = [];

    const applyTimerA11y = (container) => {
      container.querySelectorAll(".ap-timer[role='textbox']").forEach((timer) => {
        if (!timer.getAttribute("aria-label")) {
          timer.setAttribute("aria-label", playbackTimeLabel);
        }
      });
    };

    // Fix play button position issue
    const style = document.createElement("style");
    style.textContent = `
      .ap-player .ap-overlay-start .ap-play-button span > svg {
        display: inline;
      }
    `;
    document.head.appendChild(style);
    // Initialize asciinema players
    document.querySelectorAll(".asciinema-player").forEach((el) => {
      const castFile = el.dataset.castFile;
      const theme = el.dataset.theme || "asciinema";
      const speed = parseFloat(el.dataset.speed) || 1;
      const autoplay = el.dataset.autoplay === "true";
      const loop = el.dataset.loop === "true";
      const poster = el.dataset.poster || "";
      const markers = el.dataset.markers ? JSON.parse(el.dataset.markers) : [];

      // Create asciinema player
      if (window.AsciinemaPlayer) {
        window.AsciinemaPlayer.create(castFile, el, {
          theme: theme,
          speed: speed,
          autoplay: autoplay,
          loop: loop,
          poster: poster || undefined,
          markers: markers.length > 0 ? markers : undefined,
          controls: true,  // Always show user controls (bottom control bar)
          idleTimeLimit: 2,  // Limit terminal inactivity to 2 seconds (compress pauses longer than 2s)
        });
        applyTimerA11y(el);
        const observer = new MutationObserver(() => applyTimerA11y(el));
        observer.observe(el, { childList: true, subtree: true });
        observers.push(observer);
      }
    });

    // Prevent lingering observers when navigating away.
    window.addEventListener(
      "pagehide",
      () => {
        observers.forEach((observer) => observer.disconnect());
      },
      { once: true },
    );
  });
</script>