Function fillFileSnippet

public/js/fileListView.js:550–712

(file, snippetEl)

}

async function fillFileSnippet(file, snippetEl) {
  if (!snippetEl) return;
  snippetEl.textContent = "";
  snippetEl.style.display = "none";

  const folder = file.folder || window.currentFolder || "root";
  const key    = `${folder}::${file.name}`;
  const ext    = getFileExt(file.name || "");
  const bytes  = Number.isFinite(file.sizeBytes) ? file.sizeBytes : null;
  const isOffice = OFFICE_SNIPPET_EXTS.has(ext);

  // Reuse cache if we have it
  if (_fileSnippetCache.has(key)) {
    const cached = _fileSnippetCache.get(key);
    if (cached) {
      snippetEl.textContent = cached;
      snippetEl.style.display = "block";
    }
    return;
  }

  // ============================
  // OFFICE DOCS (DOCX/XLSX/PPTX)
  // ============================
  if (isOffice) {
    // Size guard (avoid parsing massive Office files)
    const MAX_OFFICE_BYTES = 20 * 1024 * 1024; // 20 MiB
    if (bytes != null && bytes > MAX_OFFICE_BYTES) {
      const msg = t("no_preview_available") || "No preview available";
      snippetEl.style.display = "block";
      snippetEl.textContent   = msg;
      _fileSnippetCache.set(key, msg);
      return;
    }

    snippetEl.style.display = "block";
    snippetEl.textContent   = t("loading") || "Loading...";

    try {
      const url = withBase(`/api/file/snippet.php?folder=${encodeURIComponent(folder)}&file=${encodeURIComponent(file.name)}&t=${Date.now()}`);
      const res = await fetch(url, { credentials: "include" });
      if (!res.ok) throw 0;

      const j = await res.json().catch(() => ({}));
      let text = (j && typeof j.snippet === "string") ? j.snippet : "";
      text = text || "";

      if (!text) {
        snippetEl.textContent = "";
        snippetEl.style.display = "none";
        _fileSnippetCache.set(key, "");
        return;
      }

      // Same visual rule as before: 6 lines, 600 chars, but let lines be a bit wider
      const MAX_LINES       = 6;
      const MAX_CHARS_TOTAL = 600;
      const MAX_LINE_CHARS  = 60;