beecast 0.1.0

Browser Cast — turn an asciinema .cast recording into a single self-contained .html player page.
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>@@BEECAST_TITLE@@</title>
<link rel="icon" href="data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%2016%2016'%3E%3Ctext%20x='0'%20y='13'%20font-size='13'%3E%F0%9F%90%9D%3C/text%3E%3C/svg%3E">
<style>
@@BEECAST_PLAYER_CSS@@
</style>
<style>
:root { color-scheme: dark; }
* { box-sizing: border-box; }
/* `height` (not `min-height`): the flex chain must be definite, or the percentage heights
   down at #player resolve to content height and the terminal renders 0-sized. */
body { margin: 0; background: #121317; color: #d7d9df; font: 14px/1.5 system-ui, sans-serif;
  height: 100vh; display: flex; flex-direction: column; }
header { padding: 14px 16px 4px; }
header h1 { margin: 0; font-size: 18px; }
#summary { margin: 6px 0 0; color: #a7abb6; max-width: 84ch; }
#summary[hidden] { display: none; }
.controls { padding: 10px 16px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.controls .sep { color: #3a3d46; }
.controls button { color: #7ab4ff; background: none; border: 1px solid #2a2d36; border-radius: 6px;
  padding: 4px 10px; font: inherit; cursor: pointer; }
.controls button:hover { border-color: #7ab4ff; }
.controls button.active { border-color: #7ab4ff; color: #fff; background: #1d2a3d; }
#note { background: #1d1f26; border: 1px solid #2a2d36; border-radius: 6px; color: #d7d9df;
  font: inherit; padding: 4px 8px; width: 28ch; }
.dim { color: #8a8d97; }
.dim code { background: #1d1f26; padding: 1px 5px; border-radius: 4px; }
#copied { color: #7dd87d; visibility: hidden; }
#note-banner { margin: 0 16px 10px; padding: 8px 12px; border: 1px solid #6b5d2a; background: #2a2410;
  border-radius: 6px; color: #ffd97a; max-width: 100ch; }
#note-banner[hidden] { display: none; }
#note-banner .at { color: #b9a24e; margin-right: 8px; font-variant-numeric: tabular-nums; }
#chapters { padding: 0 16px 10px; display: flex; flex-wrap: wrap; gap: 6px; }
#chapters button { font: inherit; font-size: 12px; color: #ccd; background: #1d1f26;
  border: 1px solid #2a2d36; border-radius: 5px; padding: 2px 8px; cursor: pointer; }
#chapters button:hover { border-color: #7ab4ff; color: #fff; }
#chapters button .t { color: #7ab4ff; margin-right: 5px; font-variant-numeric: tabular-nums; }
/* Fill the viewport below the header/controls so fit:'both' fits vertically too. */
#player-wrap { flex: 1; padding: 0 16px 10px; min-height: 300px; }
#player, .ap-player { width: 100%; height: 100%; max-width: 100%; }
footer { padding: 0 16px 12px; font-size: 12px; color: #6c7080; }
</style>
</head>
<body>
<header>
<h1>@@BEECAST_TITLE@@</h1>
<p id="summary"@@BEECAST_SUMMARY_HIDDEN@@>@@BEECAST_SUMMARY@@</p>
</header>
<div class="controls">
<span class="dim">speed</span>
<button data-speed="0.5">0.5×</button>
<button data-speed="1" class="active">1×</button>
<button data-speed="1.5">1.5×</button>
<button data-speed="2">2×</button>
<button data-speed="3">3×</button>
<span class="sep">·</span>
<input id="note" placeholder="optional comment for the link">
<button id="copy-t">🔗 copy link at current time</button><span id="copied">copied</span>
<span class="dim">deep link: <code>?t=90</code> / <code>?t=1:30&amp;note=…</code></span>
</div>
<div id="note-banner" hidden></div>
<div id="chapters"></div>
<div id="player-wrap"><div id="player"></div></div>
<footer>@@BEECAST_FOOTER@@ — a single self-contained file: save this page and it keeps working offline.</footer>
<script>
@@BEECAST_PLAYER_JS@@
</script>
<script>
"use strict";
// The recording and its metadata, inlined at build time — the page never fetches anything.
const CAST_DATA = @@BEECAST_CAST_JSON@@;
const META = @@BEECAST_META_JSON@@;
(function () {
  const $ = (id) => document.getElementById(id);
  const chapters = META.chapters || [];
  const MARKERS = chapters.map((c) => [c.t, c.title]);

  // "93.5" | "1:33.5" | "1:02:03" -> seconds; null when malformed.
  function parseT(s) {
    if (!s || !/^[0-9]+(\.[0-9]+)?(:[0-9]+(\.[0-9]+)?){0,2}$/.test(s)) return null;
    let t = 0;
    for (const p of s.split(':')) t = t * 60 + Number(p);
    return Number.isFinite(t) ? t : null;
  }
  function fmtClock(t) {
    t = Math.max(0, t);
    const m = Math.floor(t / 60), s = Math.floor(t % 60);
    return m + ':' + String(s).padStart(2, '0');
  }

  // Deep links arrive as URL *query parameters* (?t=…&note=…), never fragments or server
  // routes, so they work identically over http(s) and from a local file:// path.
  const params = new URLSearchParams(location.search);
  const linkT = parseT(params.get('t'));
  const linkNote = params.get('note');

  let player = null;
  let speed = 1;
  let wasPlaying = false;

  // The player has no runtime set-speed API, so speed changes (and reloads) recreate it
  // in place, parked or playing at the same moment.
  function create(startAt, autoPlay) {
    if (player) { try { player.dispose(); } catch (e) {} player = null; }
    const opts = { fit: 'both', preload: true, markers: MARKERS, speed: speed, idleTimeLimit: 2 };
    if (startAt != null && startAt > 0) {
      opts.startAt = startAt;
      opts.poster = 'npt:' + startAt; // park on the linked frame, visible before play
    }
    if (autoPlay) opts.autoPlay = true;
    player = AsciinemaPlayer.create({ data: CAST_DATA }, $('player'), opts);
    player.addEventListener('play', () => { wasPlaying = true; });
    player.addEventListener('playing', () => { wasPlaying = true; });
    player.addEventListener('pause', () => { wasPlaying = false; });
    player.addEventListener('ended', () => { wasPlaying = false; });
  }

  document.querySelectorAll('[data-speed]').forEach((b) => {
    b.addEventListener('click', () => {
      speed = Number(b.dataset.speed);
      document.querySelectorAll('[data-speed]').forEach((x) => x.classList.toggle('active', x === b));
      const resume = wasPlaying;
      Promise.resolve(player ? player.getCurrentTime() : 0).then((t) => create(t, resume));
    });
  });

  const cbar = $('chapters');
  chapters.forEach((c) => {
    const b = document.createElement('button');
    const t = document.createElement('span');
    t.className = 't';
    t.textContent = fmtClock(c.t);
    b.appendChild(t);
    b.appendChild(document.createTextNode(c.title));
    b.addEventListener('click', () => {
      if (player) Promise.resolve(player.seek(c.t)).then(() => player.play());
    });
    cbar.appendChild(b);
  });

  $('copy-t').addEventListener('click', () => {
    Promise.resolve(player ? player.getCurrentTime() : 0).then((now) => {
      const t = Math.round(now * 10) / 10;
      const base = location.href.split(/[?#]/)[0];
      let url = base + '?t=' + t;
      const note = $('note').value.trim();
      if (note) url += '&note=' + encodeURIComponent(note);
      try { history.replaceState(null, '', url); } catch (e) { /* some file:// contexts refuse; the copy below still works */ }
      const done = () => {
        $('copied').style.visibility = 'visible';
        setTimeout(() => { $('copied').style.visibility = 'hidden'; }, 1200);
      };
      const fallback = () => {
        const ta = document.createElement('textarea');
        ta.value = url;
        ta.style.position = 'fixed';
        ta.style.opacity = '0';
        document.body.appendChild(ta);
        ta.select();
        let ok = false;
        try { ok = document.execCommand('copy'); } catch (e) {}
        document.body.removeChild(ta);
        if (ok) done(); else window.prompt('Copy this link:', url);
      };
      if (navigator.clipboard && navigator.clipboard.writeText) {
        navigator.clipboard.writeText(url).then(done, fallback);
      } else {
        fallback();
      }
    });
  });

  if (linkNote) {
    const nb = $('note-banner');
    if (linkT != null) {
      const at = document.createElement('span');
      at.className = 'at';
      at.textContent = '@' + fmtClock(linkT);
      nb.appendChild(at);
    }
    nb.appendChild(document.createTextNode(linkNote));
    nb.hidden = false;
    $('note').value = linkNote; // pre-fill so re-sharing keeps the comment
  }

  create(linkT, false);
})();
</script>
</body>
</html>