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Slideshow folders can include PDFs

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PDFs in a slideshow folder now play alongside images and Word documents:
a one-page PDF is shown whole, a longer one fits the width and scrolls
through its pages during docInterval (first 30 pages - rendering a huge
PDF for a few seconds on screen isn't worth the time and memory).

- kiosk-app/pdf-render.mjs renders pages to canvases with pdf.js
  (pdfjs-dist ^6.3.289, new kiosk-app dependency): no viewer toolbar, and
  the slideshow's existing auto-scroll works on it. pdf.js >= 4.2.67 is
  required (CVE-2024-4367: older versions could run script embedded in a
  crafted PDF); isEvalSupported:false too. It's a module because pdf.js
  only ships as one - confirmed to load (with its worker) from file:// in
  Electron 44.
- Hands pdf.js a copy of the bytes: it transfers the buffer it's given,
  which would break the cached copy the next time round.
- slideshow.js lists .pdf as a document type; the title-request handler
  serves any listed non-image item (still only from that folder).
- provision_install_app now copies kiosk-app/*.mjs as well - without it
  pdf-render.mjs would never reach an installed kiosk.

Tested with the real main.js on Electron 44.5.1 under Xvfb + Openbox,
app files copied with provision_install_app's own glob: a photo, a
one-page PDF, a three-page PDF and a .docx played in order, twice round;
the one-page PDF shown whole, the three-page one scrolled through all
pages. Offline bundle rebuilt with pdfjs-dist (437 MB total, +22 MB).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Cjz8a58eB5P9sUweqd3NHm
This commit is contained in:
Claude
2026-10-03 15:43:05 +00:00
parent 4b85ae59fc
commit fb4ee6fa62
6 changed files with 107 additions and 24 deletions
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lib/provision.sh
+3 -2
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@@ -122,8 +122,9 @@ provision_install_nodejs() {
provision_install_app() {
echo "[4/10] Installing kiosk app..."
sudo cp "$KIOSK_APP_SRC"/*.js "$KIOSK_APP_SRC"/*.html "$KIOSK_APP_SRC/package.json" "$KIOSK_APP_SRC/start.sh" "$KIOSK_DIR/"
sudo chown "$KIOSK_USER:$KIOSK_USER" "$KIOSK_DIR"/*.js "$KIOSK_DIR"/*.html "$KIOSK_DIR/package.json" "$KIOSK_DIR/start.sh"
# *.mjs: pdf-render.mjs (pdf.js only ships as a JavaScript module).
sudo cp "$KIOSK_APP_SRC"/*.js "$KIOSK_APP_SRC"/*.mjs "$KIOSK_APP_SRC"/*.html "$KIOSK_APP_SRC/package.json" "$KIOSK_APP_SRC/start.sh" "$KIOSK_DIR/"
sudo chown "$KIOSK_USER:$KIOSK_USER" "$KIOSK_DIR"/*.js "$KIOSK_DIR"/*.mjs "$KIOSK_DIR"/*.html "$KIOSK_DIR/package.json" "$KIOSK_DIR/start.sh"
sudo chmod +x "$KIOSK_DIR/start.sh"
if offline_mode_active; then