Claude
c54ae352a1
A site whose path is a local .docx renders as pages in the kiosk instead of Chromium offering a download. kiosk-app/docview.js maps the file URL to docview.html (alongside slideshow.js, through main.js's new resolveLocalSite) and pushes the file's bytes into the page from the main process; the page renders them with docx-preview + jszip, both pure-JS npm dependencies of kiosk-app (so online installs, Advanced -> Upgrade and the offline bundle all pick them up - no LibreOffice). - Scaled to the screen width (capped at 160%), scrolls normally. - Re-checked every minute; a changed file re-renders from the top. - Word's Symbol/Wingdings private-use bullet glyphs (U+F0B7 etc.), which render blank without Microsoft fonts, are mapped to Unicode (•, ▪, ...). - Missing/unreadable/oversized (>50 MB) files and a missing library show a message instead of a blank page. .doc/.odt aren't supported. Tested with the real main.js on Electron 44.5.1 under Xvfb + Openbox: heading, coloured bold run, image, bordered table, bullets and a page break rendered; wheel scrolling works; replacing the file while running re-rendered the new document within the refresh. Offline bundle rebuilt and contains docx-preview and jszip. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Cjz8a58eB5P9sUweqd3NHm
83 lines
3.1 KiB
JavaScript
83 lines
3.1 KiB
JavaScript
// Word document (.docx) support for main.js.
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//
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// A site whose URL is a local .docx file (file:///home/kiosk/docs/menu.docx,
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// entered in the Sites menu or Web UI as /home/kiosk/docs/menu.docx) is
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// rendered with docx-preview (an npm dependency of this app - pure
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// JavaScript, works offline) instead of Chromium offering to download it.
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// main.js swaps the file URL for docview.html via resolveSiteUrl(), then
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// attach() hands the page the file's bytes - the page itself has no
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// filesystem access (contextIsolation, no Node). The file is re-checked
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// every minute and re-rendered if it changed, so replacing the document
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// on disk updates the kiosk without a restart.
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//
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// Only .docx (Word 2007+). Old binary .doc and LibreOffice .odt aren't
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// supported by docx-preview - save those as .docx or PDF.
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const fs = require('fs');
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const path = require('path');
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const { fileURLToPath, pathToFileURL } = require('url');
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const VIEWER_PAGE = path.join(__dirname, 'docview.html');
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const REFRESH_MS = 60000;
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const MAX_BYTES = 50 * 1024 * 1024;
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// The .docx path a site URL points at, or null.
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function docxPath(url) {
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if (typeof url !== 'string' || !url.startsWith('file://')) return null;
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let p;
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try {
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p = fileURLToPath(url);
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} catch (e) {
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return null;
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}
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return path.extname(p).toLowerCase() === '.docx' ? p : null;
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}
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// What a view should actually load for a configured site URL.
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function resolveSiteUrl(url) {
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const file = docxPath(url);
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if (!file) return url;
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const u = pathToFileURL(VIEWER_PAGE);
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u.searchParams.set('file', file);
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return u.href;
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}
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function readDoc(file) {
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try {
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const st = fs.statSync(file);
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if (st.size > MAX_BYTES) return { file, error: `Document is too large to show (${Math.round(st.size / 1048576)} MB).` };
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return { file, mtime: st.mtimeMs, data: fs.readFileSync(file).toString('base64') };
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} catch (e) {
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return { file, error: e.code === 'ENOENT' ? `File not found: ${file}` : `Can't read ${file}: ${e.message}` };
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}
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}
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// Feed a view's viewer page the document now and again whenever the file
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// changes. Call once per view; safe on views that never show a document.
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function attach(webContents) {
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let lastKey = '';
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const send = (force) => {
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if (webContents.isDestroyed()) return;
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const current = webContents.getURL();
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if (!current.startsWith(pathToFileURL(VIEWER_PAGE).href)) return;
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const file = new URL(current).searchParams.get('file');
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if (!file) return;
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let key;
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try {
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const st = fs.statSync(file);
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key = `${st.mtimeMs}:${st.size}`;
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} catch (e) {
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key = 'missing';
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}
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if (!force && key === lastKey) return;
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lastKey = key;
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webContents.executeJavaScript(`window.kioskDocView&&window.kioskDocView.show(${JSON.stringify(readDoc(file))})`)
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.catch(() => {});
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};
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webContents.on('did-finish-load', () => send(true));
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const timer = setInterval(() => send(false), REFRESH_MS);
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webContents.once('destroyed', () => clearInterval(timer));
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}
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module.exports = { resolveSiteUrl, docxPath, attach };
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