lavira-code/index.html at main · NJU-R-L-Group-Embodied-Lab/lavira-code · GitHub

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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>LaViRA Viewer</title>
<style>
  :root {
    --bg: #0f1115;
    --fg: #e6e9ef;
    --muted: #9aa3af;
    --panel: #171a21;
    --border: #2a2f3a;
  }
  * { box-sizing: border-box; }
  html, body { margin: 0; height: 100%; background: var(--bg); color: var(--fg);
    font-family: system-ui, -apple-system, Segoe UI, Roboto, "PingFang SC", "Noto Sans CJK SC", "Microsoft Yahei", sans-serif; }
  .app { display: grid; grid-template-columns: 240px 1fr 1fr; grid-template-rows: auto 1fr; height: 100%; min-height: 0; }
  header { grid-column: 1 / -1; padding: 8px 12px; border-bottom: 1px solid var(--border); background: var(--panel);
    display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
  header h1 { font-size: 16px; margin: 0; font-weight: 600; }
  .controls { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
  button, select, input[type="range"] { background: #202532; color: var(--fg); border: 1px solid var(--border);
    border-radius: 6px; padding: 6px 10px; font-size: 14px; }
  button:hover { border-color: #3a4252; }
  button:disabled { opacity: 0.5; cursor: not-allowed; }
  .sidebar { border-right: 1px solid var(--border); background: #12151c; overflow: auto; min-height: 0; }
  .group-title { padding: 10px 12px; font-size: 13px; color: var(--muted); border-bottom: 1px solid var(--border); }
  .folders { list-style: none; margin: 0; padding: 0; }
  .folders li { padding: 10px 12px; cursor: pointer; border-bottom: 1px solid rgba(255,255,255,0.06);
    display: flex; align-items: center; justify-content: space-between; }
  .folders li:hover { background: rgba(255,255,255,0.05); }
  .folders li.active { background: rgba(90,169,255,0.18); color: white; }
  .folders .badge { font-size: 12px; color: var(--muted); }

  .pane { position: relative; height: 100%; display: grid; grid-template-rows: 1fr auto; min-height: 0; }
  .img-wrap { position: relative; width: 100%; height: 100%; background: #0b0d12; display: grid; place-items: center; overflow: hidden; }
  .img-wrap img { max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; display: block; }
  .footer { padding: 8px 12px; font-size: 12px; color: var(--muted); border-top: 1px solid var(--border);
    display: flex; justify-content: space-between; align-items: center; gap: 12px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
  .status { color: var(--muted); }
  .spacer { flex: 1; }
  .range { display: flex; align-items: center; gap: 6px; }
  input[type="range"] { width: 160px; }

  @media (max-width: 1080px) {
    .app { grid-template-columns: 220px 1fr; grid-template-rows: auto 1fr 1fr; }
    .pane.bbox { grid-column: 1 / -1; }
  }
  @media (max-width: 820px) {
    .app { grid-template-columns: 1fr; grid-template-rows: auto auto 1fr 1fr; }
    .sidebar { grid-row: 2; height: 180px; }
  }
</style>
</head>
<body>
<div class="app">
  <header>
    <h1>LaViRA Viewer</h1>
    <div class="controls">
      <button id="prevBtn" title="Previous [←]">⟨</button>
      <button id="playBtn" title="Play/Pause [Space]">▶</button>
      <button id="nextBtn" title="Next [→]">⟩</button>
      <label class="range">Speed
        <input id="fps" type="range" min="1" max="60" step="1" value="10">
        <span id="fpsLabel">10 fps</span>
      </label>
      <label><input id="loop" type="checkbox" checked> Loop [L]</label>
      <select id="fitMode" title="Fit Mode">
        <option value="contain" selected>Fit Window</option>
        <option value="cover">Cover Crop</option>
        <option value="native">Native Pixels</option>
      </select>
    </div>
    <div class="spacer"></div>
  </header>

  <aside class="sidebar">
    <div class="group-title">Subdirectories (saved_rgb_images/)</div>
    <ul class="folders" id="folderList"></ul>
  </aside>

  <section class="pane combined">
    <div class="img-wrap">
      <img id="combinedImg" alt="combined frame" />
    </div>
    <div class="footer">
      <div id="combinedInfo">Not loaded</div>
      <div class="status" id="combinedStatus">0 / 0</div>
    </div>
  </section>

  <section class="pane bbox">
    <div class="img-wrap">
      <img id="bboxImg" alt="bbox frame" />
    </div>
    <div class="footer">
      <div id="bboxInfo">Not loaded</div>
      <div class="status" id="bboxStatus"></div>
    </div>
  </section>
</div>

<script>
(() => {
  const ROOT = 'saved_rgb_images';
  const combinedRe = /^combined_step(\d+)\.(png|jpg|jpeg|webp|bmp)$/i;
  const bboxRe = /^bbox_step(\d+)\.(png|jpg|jpeg|webp|bmp)$/i;

  // DOM
  const folderList = document.getElementById('folderList');
  const combinedImg = document.getElementById('combinedImg');
  const bboxImg = document.getElementById('bboxImg');
  const prevBtn = document.getElementById('prevBtn');
  const nextBtn = document.getElementById('nextBtn');
  const playBtn = document.getElementById('playBtn');
  const fpsInput = document.getElementById('fps');
  const fpsLabel = document.getElementById('fpsLabel');
  const loopChk = document.getElementById('loop');
  const fitModeSel = document.getElementById('fitMode');
  const combinedInfo = document.getElementById('combinedInfo');
  const combinedStatus = document.getElementById('combinedStatus');
  const bboxInfo = document.getElementById('bboxInfo');
  const bboxStatus = document.getElementById('bboxStatus');

  // State
  let folders = [];
  let combined = []; // [{step, url}]
  let bboxMap = new Map(); // step -> url
  let bboxStepsSorted = []; // ascending array
  let idx = 0;
  let playing = false;
  let timer = null;
  let fitMode = 'contain';

  // image cache
  const cacheImg = new Map();
  function loadImage(url) {
    if (cacheImg.has(url)) return Promise.resolve(cacheImg.get(url));
    return new Promise((resolve, reject) => {
      const img = new Image();
      img.onload = () => { cacheImg.set(url, img); resolve(img); };
      img.onerror = () => reject(new Error('Load failed: ' + url));
      img.src = url;
    });
  }

  async function listDirectory(path) {
    const res = await fetch(path);
    if (!res.ok) throw new Error('Cannot access directory: ' + path);
    const html = await res.text();
    const doc = new DOMParser().parseFromString(html, 'text/html');
    const links = [...doc.querySelectorAll('a')].map(a => a.getAttribute('href')).filter(Boolean);
    return links;
  }

  function parseFiles(links, base) {
    const files = links.filter(h => h !== '../' && !h.endsWith('/'));
    const cList = [];
    const bMap = new Map();
    for (const f of files) {
      const mC = f.match(combinedRe);
      if (mC) { cList.push({ step: Number(mC[1]), url: `${base}/${f}` }); continue; }
      const mB = f.match(bboxRe);
      if (mB) { bMap.set(Number(mB[1]), `${base}/${f}`); continue; }
    }
    cList.sort((a,b) => a.step - b.step);
    const bSteps = Array.from(bMap.keys()).sort((a,b) => a - b);
    return { cList, bMap, bSteps };
  }

  async function scanFolders() {
    const links = await listDirectory(`${ROOT}/`);
    folders = links
      .filter(h => h !== '../' && h.endsWith('/'))
      .map(h => h.replace(/\/$/, ''))
      .sort((a,b) => {
        const na = Number(a), nb = Number(b);
        if (!Number.isNaN(na) && !Number.isNaN(nb)) return na - nb;
        return a.localeCompare(b, undefined, { numeric: true, sensitivity: 'base' });
      });
    renderFolderList();
    if (folders.length) selectFolder(folders[0]);
    else folderList.innerHTML = '<li>No subdirectories found</li>';
  }

  function renderFolderList() {
    folderList.innerHTML = '';
    folders.forEach(name => {
      const li = document.createElement('li');
      li.textContent = name;
      const badge = document.createElement('span');
      badge.className = 'badge';
      badge.textContent = '';
      li.appendChild(badge);
      li.addEventListener('click', () => selectFolder(name));
      folderList.appendChild(li);
    });
    highlightActiveFolder();
  }

  function highlightActiveFolder(active) {
    [...folderList.children].forEach(li => {
      li.classList.toggle('active', li.firstChild.nodeValue === active);
    });
  }

  async function selectFolder(name) {
    highlightActiveFolder(name);
    combinedInfo.textContent = `Loading ${name}...`;
    bboxInfo.textContent = '';
    combined = []; bboxMap = new Map(); bboxStepsSorted = []; idx = 0; stop();
    try {
      const base = `${ROOT}/${encodeURIComponent(name)}`;
      const links = await listDirectory(`${base}/`);
      const { cList, bMap, bSteps } = parseFiles(links, base);
      combined = cList;
      bboxMap = bMap;
      bboxStepsSorted = bSteps;

      // update count badges
      [...folderList.children].forEach(li => {
        if (li.firstChild.nodeValue === name) {
          li.querySelector('.badge').textContent = `${combined.length}C / ${bboxMap.size}B`;
        }
      });

      if (!combined.length) {
        combinedInfo.textContent = `No combined_stepXXXX.* found in directory ${name}`;
        combinedStatus.textContent = '0 / 0';
        combinedImg.removeAttribute('src');
        bboxImg.removeAttribute('src');
        bboxInfo.textContent = 'No bbox';
        bboxStatus.textContent = '';
      } else {
        show(0);
      }
    } catch (e) {
      console.error(e);
      combinedInfo.textContent = `Read failed: ${e.message}`;
      combinedImg.removeAttribute('src');
      bboxImg.removeAttribute('src');
      bboxInfo.textContent = '';
      combinedStatus.textContent = '0 / 0';
      bboxStatus.textContent = '';
    }
  }

  function applyFitMode(imgEl, imgObj) {
    if (fitMode === 'contain') {
      imgEl.style.objectFit = 'contain';
      imgEl.style.width = 'auto';
      imgEl.style.height = 'auto';
      imgEl.style.imageRendering = 'auto';
    } else if (fitMode === 'cover') {
      imgEl.style.objectFit = 'cover';
      imgEl.style.width = '100%';
      imgEl.style.height = '100%';
      imgEl.style.imageRendering = 'auto';
    } else if (fitMode === 'native') {
      imgEl.style.objectFit = 'contain';
      imgEl.style.width = imgObj.naturalWidth + 'px';
      imgEl.style.height = 'auto';
      imgEl.style.imageRendering = 'pixelated';
    }
  }

  // Binary search: find largest element <= step in sorted bboxStepsSorted
  function findLeStep(step) {
    const arr = bboxStepsSorted;
    let lo = 0, hi = arr.length - 1, ans = -1;
    while (lo <= hi) {
      const mid = (lo + hi) >> 1;
      if (arr[mid] <= step) { ans = arr[mid]; lo = mid + 1; }
      else { hi = mid - 1; }
    }
    return ans; // -1 means no bbox with step <= given step
  }

  async function show(i) {
    if (!combined.length) return;
    idx = (i + combined.length) % combined.length;
    const { step, url } = combined[idx];

    // Combined
    try {
      const cimg = await loadImage(url);
      applyFitMode(combinedImg, cimg);
      combinedImg.src = cimg.src;
      combinedInfo.textContent = `${decodeURIComponent(url)} (step ${step})`;
      combinedStatus.textContent = `${idx + 1} / ${combined.length}`;
      // prefetch next combined frame
      const nextIdx = (idx + 1) % combined.length;
      if (nextIdx !== idx) {
        const nurl = combined[nextIdx].url;
        if (!cacheImg.has(nurl)) loadImage(nurl).catch(()=>{});
      }
    } catch (e) {
      combinedInfo.textContent = e.message;
      combinedImg.removeAttribute('src');
      combinedStatus.textContent = `${idx + 1} / ${combined.length}`;
    }

    // BBox: prefer exact step match; otherwise fall back to nearest step <= current step
    let bstep = step;
    let burl = bboxMap.get(bstep);
    if (!burl) {
      bstep = findLeStep(step);
      burl = bstep >= 0 ? bboxMap.get(bstep) : undefined;
    }
    if (burl) {
      try {
        const bimg = await loadImage(burl);
        applyFitMode(bboxImg, bimg);
        bboxImg.src = bimg.src;
        if (bstep === step) {
          bboxInfo.textContent = `${decodeURIComponent(burl)} (matched step ${step})`;
        } else {
          bboxInfo.textContent = `${decodeURIComponent(burl)} (fallback to step ${bstep})`;
        }
        bboxStatus.textContent = `${bimg.naturalWidth}×${bimg.naturalHeight}`;
        // prefetch next bbox frame using same matching logic
        const nextStep = combined[(idx + 1) % combined.length].step;
        const nextBstep = bboxMap.has(nextStep) ? nextStep : findLeStep(nextStep);
        const nburl = nextBstep >= 0 ? bboxMap.get(nextBstep) : undefined;
        if (nburl && !cacheImg.has(nburl)) loadImage(nburl).catch(()=>{});
      } catch (e) {
        bboxImg.removeAttribute('src');
        bboxInfo.textContent = `Failed to load bbox: ${e.message}`;
        bboxStatus.textContent = '';
      }
    } else {
      bboxImg.removeAttribute('src');
      bboxInfo.textContent = `No bbox available before step ${step}`;
      bboxStatus.textContent = '';
    }
  }

  function prev() { show(idx - 1); }
  function next() {
    if (!combined.length) return;
    if (idx === combined.length - 1 && !loopChk.checked) { stop(); return; }
    show(idx + 1);
  }

  function play() {
    if (playing || !combined.length) return;
    playing = true; playBtn.textContent = '⏸'; schedule();
  }
  function stop() {
    playing = false; playBtn.textContent = '▶';
    if (timer) { clearTimeout(timer); timer = null; }
  }
  function togglePlay() { playing ? stop() : play(); }
  function schedule() {
    if (!playing) return;
    const fps = parseInt(fpsInput.value, 10) || 10;
    const interval = 1000 / fps;
    timer = setTimeout(() => { next(); schedule(); }, interval);
  }

  // events
  prevBtn.addEventListener('click', prev);
  nextBtn.addEventListener('click', next);
  playBtn.addEventListener('click', togglePlay);
  fpsInput.addEventListener('input', () => {
    fpsLabel.textContent = `${fpsInput.value} fps`;
    if (playing) { stop(); play(); }
  });
  loopChk.addEventListener('change', () => {});
  fitModeSel.addEventListener('change', () => {
    fitMode = fitModeSel.value;
    const cur = combined[idx];
    if (cur) {
      const cimg = cacheImg.get(cur.url);
      if (cimg) applyFitMode(combinedImg, cimg);
    }
  });

  window.addEventListener('keydown', (e) => {
    if (['INPUT','TEXTAREA','SELECT'].includes(e.target.tagName)) return;
    if (e.key === 'ArrowLeft') { e.preventDefault(); prev(); }
    if (e.key === 'ArrowRight') { e.preventDefault(); next(); }
    if (e.code === 'Space') { e.preventDefault(); togglePlay(); }
    if (e.key.toLowerCase() === 'l') { loopChk.checked = !loopChk.checked; }
    if (e.key === '+' || e.key === '=') { fpsInput.value = String(Math.min(60, Number(fpsInput.value)+1)); fpsInput.dispatchEvent(new Event('input')); }
    if (e.key === '-' || e.key === '_') { fpsInput.value = String(Math.max(1, Number(fpsInput.value)-1)); fpsInput.dispatchEvent(new Event('input')); }
  });

  // init
  fpsLabel.textContent = `${fpsInput.value} fps`;
  scanFolders();
})();
</script>
</body>
</html>