cue/presenter.html at main · luisassardo/cue · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Presenter</title>
<link rel="icon" href="/__dm/brand/icons/32x32.png">
<link rel="stylesheet" href="/__dm/cue.css">
<style>
  * { box-sizing:border-box; margin:0; padding:0; }
  html, body { height:100%; }
  body { background:var(--cue-canvas); color:var(--cue-ink); font-family:var(--cue-sans);
    -webkit-font-smoothing:antialiased; display:flex; flex-direction:column; overflow:hidden; }

  header { display:flex; align-items:center; gap:18px; padding:12px 18px;
    border-bottom:1px solid var(--cue-line); flex-shrink:0; }
  .title { font-size:15px; font-weight:550; letter-spacing:-.015em;
    white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
  .spacer { flex:1; }
  .clockbox { display:flex; align-items:center; gap:14px;
    font-family:var(--cue-mono); font-size:13px; color:var(--cue-ink-3); }
  .elapsed { font-size:19px; font-weight:500; color:var(--cue-ink);
    min-width:82px; text-align:right; font-variant-numeric:tabular-nums; }

  /* header controls share the toolbar treatment */
  .tbtn { font-family:var(--cue-sans); font-size:12px; color:var(--cue-ink-2);
    background:transparent; border:1px solid var(--cue-line); border-radius:var(--cue-r-md);
    padding:7px 11px; cursor:pointer;
    transition:color .3s var(--cue-ease), background .3s var(--cue-ease), border-color .3s var(--cue-ease); }
  .tbtn:hover { color:var(--cue-ink); background:var(--cue-raised-2); }
  .tbtn:focus-visible { outline:2px solid var(--cue-focus); outline-offset:2px; }
  .tbtn.primary { color:var(--cue-ink); background:var(--cue-raised-3); }
  .tbtn.primary:hover { background:#2C2C31; }
  .anngroup { display:flex; gap:6px; padding-right:12px; margin-right:2px;
    border-right:1px solid var(--cue-line); }
  .tbtn.ann { min-width:34px; padding:7px 9px; }
  /* the one place colour is allowed: an armed annotation tool */
  .tbtn.ann.on { color:var(--cue-canvas); background:var(--cue-ink); border-color:var(--cue-ink); }

  main { flex:1; display:grid; grid-template-columns:minmax(0,1fr) 372px; gap:14px;
    padding:14px 18px; min-height:0; }
  .cur { display:flex; flex-direction:column; min-width:0; min-height:0; }
  .frame { position:relative; background:#000; border:1px solid var(--cue-line);
    border-radius:var(--cue-r-md); overflow:hidden; flex:1; min-height:0; }
  .frame iframe { width:1920px; height:1080px; border:0; transform-origin:0 0;
    position:absolute; pointer-events:none; }
  .lab { font-size:12px; color:var(--cue-ink-3); margin:0 0 7px 2px; }
  aside { display:flex; flex-direction:column; gap:14px; min-height:0; }
  .next .frame { aspect-ratio:16/9; flex:none; }
  .notes { flex:1; display:flex; flex-direction:column; min-height:0; }
  .notes .body { flex:1; overflow:auto; background:var(--cue-raised);
    border:1px solid var(--cue-line); border-radius:var(--cue-r-md);
    padding:15px 17px; font-size:16px; line-height:1.6; color:var(--cue-ink);
    white-space:pre-wrap; }
  .notes .body:empty::before { content:'No notes for this slide.'; color:var(--cue-ink-3); }

  footer { display:flex; align-items:center; gap:14px; padding:8px 18px 12px; flex-shrink:0; }
  .count { font-family:var(--cue-mono); font-size:14px; color:var(--cue-ink-2);
    font-variant-numeric:tabular-nums; }
  .hint { font-family:var(--cue-mono); font-size:11px; color:var(--cue-ink-3); }
  .navbtn { font-size:16px; width:40px; height:32px; border-radius:var(--cue-r-md);
    border:1px solid var(--cue-line); background:var(--cue-raised-2); color:var(--cue-ink);
    cursor:pointer; transition:background .3s var(--cue-ease); }
  .navbtn:hover { background:var(--cue-raised-3); }
  .navbtn:focus-visible { outline:2px solid var(--cue-focus); outline-offset:2px; }

  @media (prefers-reduced-motion:reduce){ .tbtn,.navbtn{transition:none} }
  @media (max-width:900px){ main{grid-template-columns:1fr; grid-template-rows:1fr auto} }
</style>
</head>
<body>
<header>
  <div class="title" id="title">…</div>
  <div class="spacer"></div>
  <div class="clockbox">
    <span id="clock">--:--</span>
    <span class="elapsed" id="elapsed">00:00</span>
    <button class="tbtn" id="timer-toggle">Start</button>
    <button class="tbtn" id="timer-reset">Reset</button>
  </div>
  <span class="anngroup">
    <button class="tbtn ann" id="ann-laser">◉</button>
    <button class="tbtn ann" id="ann-pen">✎</button>
    <button class="tbtn ann" id="ann-black" title="Black the shared screen (B)">■</button>
    <button class="tbtn ann" id="ann-clear" title="Erase the ink on this slide (E)">Erase</button>
  </span>
  <button class="tbtn primary" id="audience">Play slideshow</button>
</header>
<main>
  <div class="cur">
    <div class="lab">Current slide</div>
    <div class="frame" id="cur-frame"><iframe id="cur"></iframe></div>
  </div>
  <aside>
    <div class="next">
      <div class="lab">Next slide</div>
      <div class="frame" id="next-frame"><iframe id="next"></iframe></div>
    </div>
    <div class="notes">
      <div class="lab">Notes</div>
      <div class="body" id="notes"></div>
    </div>
  </aside>
</main>
<footer>
  <button class="navbtn" id="prev">←</button>
  <button class="navbtn" id="next-btn">→</button>
  <span class="count"><span id="cur-n">1</span> / <span id="total-n">?</span></span>
  <div class="spacer"></div>
  <span class="hint">← → SPACE navigate · L laser · P pen · B black · E erase</span>
</footer>

<script>
(async () => {
  const params = new URLSearchParams(location.search);
  const deckPath = params.get('deck');
  if (!deckPath) { document.getElementById('title').textContent = 'No deck specified'; return; }
  const deckPathname = '/files/' + deckPath.split('/').map(encodeURIComponent).join('/');
  // Slide-position sync goes through the server's SSE bus (same as the deck
  // windows) so the presenter, slideshow and editor stay aligned across
  // separate browsers and native app windows.
  const clientId = Math.random().toString(36).slice(2);
  function publish() {
    fetch('/api/sync', {
      method: 'POST', headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ deck: deckPath, index, id: clientId }), keepalive: true,
    }).catch(() => {});
  }

  // --- deck metadata: parse the source file (same origin) for notes/labels
  let total = 0, notes = [], labels = [], skipped = new Set();
  try {
    const doc = new DOMParser().parseFromString(
      await (await fetch(deckPathname + '?raw=1')).text(), 'text/html');
    let legacy = [];
    const legacyTag = doc.getElementById('speaker-notes');
    if (legacyTag) { try { legacy = JSON.parse(legacyTag.textContent) || []; } catch {} }
    const sections = Array.from(doc.querySelectorAll('deck-stage > section, x-import > section'));
    total = sections.length;
    sections.forEach((s, i) => {
      notes[i] = s.getAttribute('data-speaker-notes') || legacy[i] || '';
      labels[i] = s.getAttribute('data-label') || s.getAttribute('data-screen-label') || 'Slide ' + (i + 1);
      if (s.hasAttribute('data-deck-skip')) skipped.add(i);
    });
    const t = doc.querySelector('title');
    document.getElementById('title').textContent = (t ? t.textContent : deckPath) + ' — Presenter';
  } catch (e) { console.error(e); }
  document.getElementById('total-n').textContent = total || '?';

  // --- preview iframes (deck pages in follow mode; _snthumb keeps chrome off)
  const cur = document.getElementById('cur');
  const nxt = document.getElementById('next');
  cur.src = deckPathname + '?_snthumb=1&_dmfollow=cur#1';
  nxt.src = deckPathname + '?_snthumb=1&_dmfollow=next#2';
  let curFit = { left: 0, top: 0, s: 1 };
  function fit(frame, holder) {
    const w = holder.clientWidth, h = holder.clientHeight;
    const s = Math.min(w / 1920, h / 1080);
    // transform-origin is 0 0, so scale from the top-left and center by
    // offsetting with the *scaled* dimensions (a percentage translate would
    // shift by the unscaled 1920×1080 and push the slide out of the frame).
    const left = (w - 1920 * s) / 2, top = (h - 1080 * s) / 2;
    frame.style.left = left + 'px';
    frame.style.top = top + 'px';
    frame.style.transform = 'scale(' + s + ')';
    if (frame === cur) curFit = { left, top, s };
  }
  const cf = document.getElementById('cur-frame'), nf = document.getElementById('next-frame');
  new ResizeObserver(() => fit(cur, cf)).observe(cf);
  new ResizeObserver(() => fit(nxt, nf)).observe(nf);

  // --- annotation: drive the shared slideshow window from here --------------
  // Ephemeral events go out on /api/cue; the slideshow window renders them.
  let annTool = 'off';
  const cue = (ev) => fetch('/api/cue', {
    method: 'POST', headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ deck: deckPath, ev, id: clientId }), keepalive: true,
  }).catch(() => {});

  const annBtns = {};
  function setAnn(t) {
    annTool = annTool === t ? 'off' : t;
    for (const [k, b] of Object.entries(annBtns)) b.classList.toggle('on', k === annTool);
    cf.style.cursor = annTool === 'off' ? '' : 'crosshair';
    cue({ t: 'tool', tool: annTool });
  }
  for (const [key, label, title] of [
    ['laser', '◉', 'Laser pointer — move over the slide below (L)'],
    ['pen', '✎', 'Draw — drag over the slide below (P)'],
  ]) {
    const b = document.getElementById('ann-' + key);
    annBtns[key] = b;
    b.title = title;
    b.addEventListener('click', () => setAnn(key));
  }
  document.getElementById('ann-black').addEventListener('click', function () {
    this.classList.toggle('on');
    cue({ t: 'blackout', mode: this.classList.contains('on') ? 'black' : null });
  });
  document.getElementById('ann-clear').addEventListener('click', () => cue({ t: 'clear' }));

  // Map a pointer over the current-slide preview to normalized slide coords.
  function normFromEvent(e) {
    const r = cf.getBoundingClientRect();
    const x = (e.clientX - r.left - curFit.left) / (1920 * curFit.s);
    const y = (e.clientY - r.top - curFit.top) / (1080 * curFit.s);
    return (x >= 0 && x <= 1 && y >= 0 && y <= 1) ? { x, y } : null;
  }
  let penDown = false, sendAt = 0;
  cf.addEventListener('pointermove', (e) => {
    if (annTool === 'off') return;
    const n = normFromEvent(e);
    if (!n) return;
    const now = performance.now();
    if (now - sendAt < 40) return;                 // ~25 updates/s is plenty
    sendAt = now;
    if (annTool === 'pen' && !penDown) return;     // pen only paints while held
    cue({ t: 'ptr', x: n.x, y: n.y, tool: annTool });
  });
  cf.addEventListener('pointerdown', (e) => {
    if (annTool !== 'pen') return;
    const n = normFromEvent(e);
    if (!n) return;
    penDown = true;
    cf.setPointerCapture(e.pointerId);
    cue({ t: 'ptr', x: n.x, y: n.y, tool: 'pen', start: true });
  });
  const penUp = (e) => {
    if (!penDown) return;
    penDown = false;
    const n = normFromEvent(e) || { x: 0, y: 0 };
    cue({ t: 'ptr', x: n.x, y: n.y, tool: 'pen', end: true });
  };
  cf.addEventListener('pointerup', penUp);
  cf.addEventListener('pointercancel', penUp);

  // --- shared index
  let index = 0;
  function render() {
    document.getElementById('cur-n').textContent = index + 1;
    document.getElementById('notes').textContent = notes[index] || '';
  }
  // The previews are same-origin iframes we created, so we move them by hand.
  // They used to follow over the SSE bus, which cost a connection each — see
  // the connection-budget note in presenter.js.
  function syncPreviews() {
    for (const f of [cur, nxt]) {
      try { f.contentWindow && f.contentWindow.__cueFollow && f.contentWindow.__cueFollow(index); } catch {}
    }
  }
  function goTo(i) {
    index = Math.max(0, Math.min(i, (total || 1) - 1));
    render();
    syncPreviews();     // the two previews in this window
    publish();          // any slideshow window, and the deck's own windows
    startTimerOnce();
  }
  function step(dir) {
    let i = index + dir;
    while (skipped.has(i) && i > 0 && i < total - 1) i += dir;
    goTo(i);
  }
  // Follow remote navigation (slideshow / editor advancing on their own).
  const es = new EventSource('/api/sync?deck=' + encodeURIComponent(deckPath));
  es.onmessage = (ev) => {
    let m; try { m = JSON.parse(ev.data); } catch { return; }
    if (m.id === clientId) return;
    if (typeof m.index !== 'number' || !Number.isFinite(m.index)) return;   // annotation event
    if (m.index !== index) { index = Math.max(0, Math.min(m.index, (total || 1) - 1)); render(); syncPreviews(); startTimerOnce(); }
  };
  // Re-publish once previews finish loading so late iframes catch up.
  cur.addEventListener('load', () => setTimeout(() => { syncPreviews(); publish(); }, 300));
  nxt.addEventListener('load', () => setTimeout(() => { syncPreviews(); publish(); }, 300));

  // --- controls
  document.getElementById('prev').addEventListener('click', () => step(-1));
  document.getElementById('next-btn').addEventListener('click', () => step(1));
  document.getElementById('audience').addEventListener('click', () => {
    // The clean, shareable slideshow window (no rail/overlay/toolbar).
    window.open(deckPathname + '?_dmshow=1#' + (index + 1), 'dm-slideshow');
  });
  window.addEventListener('keydown', (e) => {
    if (e.key === 'ArrowRight' || e.key === ' ' || e.key === 'PageDown') { e.preventDefault(); step(1); }
    else if (e.key === 'ArrowLeft' || e.key === 'PageUp') { e.preventDefault(); step(-1); }
    else if (e.key === 'Home') goTo(0);
    else if (e.key === 'End') goTo(total - 1);
  });

  // --- clock + elapsed timer
  const clock = document.getElementById('clock');
  setInterval(() => {
    clock.textContent = new Date().toLocaleTimeString(undefined, { hour: '2-digit', minute: '2-digit' });
  }, 1000);
  let t0 = null, acc = 0, tick = null;
  const elapsed = document.getElementById('elapsed');
  const toggle = document.getElementById('timer-toggle');
  function fmt(ms) {
    const s = Math.floor(ms / 1000);
    const m = Math.floor(s / 60);
    return String(m).padStart(2, '0') + ':' + String(s % 60).padStart(2, '0');
  }
  function startTimer() {
    if (tick) return;
    t0 = Date.now();
    tick = setInterval(() => { elapsed.textContent = fmt(acc + Date.now() - t0); }, 500);
    toggle.textContent = 'Pause';
  }
  function pauseTimer() {
    if (!tick) return;
    acc += Date.now() - t0;
    clearInterval(tick); tick = null;
    toggle.textContent = 'Start';
  }
  function startTimerOnce() { if (!tick && acc === 0) startTimer(); }
  toggle.addEventListener('click', () => (tick ? pauseTimer() : startTimer()));
  document.getElementById('timer-reset').addEventListener('click', () => {
    pauseTimer(); acc = 0; elapsed.textContent = '00:00';
  });

  render();
})();
</script>
</body>
</html>