ZDDC
d6206b03e7
Removes every runtime CDN load. The "ship the record player with the
record" philosophy: a downloaded .html file works offline against any
file the user can open, with no network dependency at runtime.
Newly vendored under shared/vendor/:
- xlsx.full.min.js (SheetJS, 928 KB) — XLSX/XLS preview
- utif.min.js (UTIF, 57 KB) — TIFF preview
Already there but now used by mdedit too:
- jszip.min.js, docx-preview.min.js
Call sites updated to drop the `await loadLibrary(URL)` pattern —
since the vendor JS is concatenated into the inline <script> at build
time, window.XLSX / window.JSZip / window.UTIF / window.docx are
available synchronously from page load.
Per-tool changes:
- archive/build.sh: +xlsx, +utif
- classifier/build.sh: +xlsx, +utif
- transmittal/build.sh: +xlsx, +utif
- mdedit/build.sh: +jszip, +docx-preview, +xlsx, +utif
(mdedit was the only tool not yet
bundling any of the preview deps)
- browse/build.sh: +utif
- archive/js/table.js, classifier/js/preview.js,
transmittal/js/files-preview.js, mdedit/js/file-tree.js (×2):
drop the `await loadLibrary('…cdn…')` lines.
- shared/preview-lib.js:
drop the loadLibrary(UTIF) / loadLibrary(JSZip) wrappers; assume
window.UTIF and window.JSZip are present.
Net bundle-size delta after baking:
archive: +990 KB → ~1.47 MB
browse: +57 KB → ~292 KB
classifier: +990 KB → ~1.43 MB
mdedit: +1100 KB → ~2.09 MB
transmittal: +990 KB → ~1.63 MB
Docs (AGENTS.md, ARCHITECTURE.md) updated: removed the "runtime CDN
loading exception" paragraph and the table row that flagged xlsx as
CDN-loaded.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
547 lines
24 KiB
JavaScript
547 lines
24 KiB
JavaScript
/**
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* ZDDC — shared preview helpers
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*
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* Cross-tool helpers for previewing file types that need a decoder:
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* - TIFF (UTIF.js) — multi-page, browser-PDF-viewer-style toolbar
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* - ZIP listing (JSZip) — sortable file-list view
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*
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* Renderers operate on any document (parent window or popup window), so the
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* same code works for tools whose preview opens in a popup (classifier,
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* archive, transmittal) and tools that render inline (mdedit).
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*
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* Public API on window.zddc.preview:
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* loadLibrary(url) → Promise<void>
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* renderTiff(doc, container, arrayBuffer, opts) → Promise<void>
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* renderZipListing(doc, container, arrayBuffer, opts) → Promise<void>
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* TIFF_EXTENSIONS, IMAGE_EXTENSIONS, TEXT_EXTENSIONS, OFFICE_EXTENSIONS
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* isTiff(ext), isImage(ext), isText(ext), isZip(ext), isOffice(ext)
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*
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* Each tool keeps its own dispatcher; this lib only owns the heavy renderers.
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*/
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(function (root) {
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'use strict';
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var TIFF_EXTENSIONS = ['tif', 'tiff'];
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var IMAGE_EXTENSIONS = ['jpg', 'jpeg', 'png', 'gif', 'svg', 'webp', 'bmp', 'ico'];
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var TEXT_EXTENSIONS = [
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'txt', 'md', 'markdown', 'json', 'xml', 'csv', 'tsv', 'log',
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'html', 'htm', 'css', 'js', 'mjs', 'ts', 'tsx', 'jsx',
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'py', 'rb', 'sh', 'bash', 'zsh', 'bat', 'ps1',
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'yaml', 'yml', 'ini', 'cfg', 'conf', 'toml',
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'c', 'cc', 'cpp', 'h', 'hpp', 'go', 'rs', 'java', 'kt',
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'sql', 'env'
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];
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var OFFICE_EXTENSIONS = ['docx', 'xlsx', 'xls'];
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function lowerExt(ext) { return (ext || '').toLowerCase(); }
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function isTiff(ext) { return TIFF_EXTENSIONS.indexOf(lowerExt(ext)) !== -1; }
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function isImage(ext) { return IMAGE_EXTENSIONS.indexOf(lowerExt(ext)) !== -1; }
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function isText(ext) { return TEXT_EXTENSIONS.indexOf(lowerExt(ext)) !== -1; }
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function isZip(ext) { return lowerExt(ext) === 'zip'; }
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function isOffice(ext) { return OFFICE_EXTENSIONS.indexOf(lowerExt(ext)) !== -1; }
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// ── CDN library loader (parent window cache) ─────────────────────────────
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var _libCache = new Map();
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function loadLibrary(url) {
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if (_libCache.has(url)) return _libCache.get(url);
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var p = new Promise(function (resolve, reject) {
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var s = document.createElement('script');
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s.src = url;
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s.onload = function () { resolve(); };
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s.onerror = function () { reject(new Error('Failed to load: ' + url)); };
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document.head.appendChild(s);
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});
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_libCache.set(url, p);
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return p;
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}
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// ── Style injection (idempotent per-document) ────────────────────────────
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function injectStyles(doc, id, css) {
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if (doc.getElementById(id)) return;
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var style = doc.createElement('style');
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style.id = id;
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style.textContent = css;
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doc.head.appendChild(style);
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}
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// ── Helpers ──────────────────────────────────────────────────────────────
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function formatSize(bytes) {
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if (bytes == null) return '';
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if (bytes < 1024) return bytes + ' B';
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if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB';
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if (bytes < 1024 * 1024 * 1024) return (bytes / (1024 * 1024)).toFixed(1) + ' MB';
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return (bytes / (1024 * 1024 * 1024)).toFixed(2) + ' GB';
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}
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function formatDate(d) {
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if (!d) return '';
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var pad = function (n) { return n < 10 ? '0' + n : '' + n; };
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return d.getFullYear() + '-' + pad(d.getMonth() + 1) + '-' + pad(d.getDate())
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+ ' ' + pad(d.getHours()) + ':' + pad(d.getMinutes());
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}
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function escapeHtml(s) {
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return String(s)
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.replace(/&/g, '&')
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.replace(/</g, '<')
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.replace(/>/g, '>')
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.replace(/"/g, '"');
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}
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// ── TIFF renderer ────────────────────────────────────────────────────────
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var TIFF_CSS =
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'.tiff-toolbar{display:flex;align-items:center;gap:.4rem;padding:.4rem .6rem;' +
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'background:#f5f5f5;border-bottom:1px solid #ddd;flex-wrap:wrap;font-size:.85rem;}' +
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'.tiff-toolbar .tiff-btn{padding:.25rem .55rem;border:1px solid #ccc;border-radius:3px;' +
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'background:#fff;cursor:pointer;font-size:.85rem;line-height:1;min-width:1.8rem;}' +
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'.tiff-toolbar .tiff-btn:hover:not(:disabled){background:#e8e8e8;}' +
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'.tiff-toolbar .tiff-btn:disabled{opacity:.4;cursor:default;}' +
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'.tiff-toolbar .tiff-page-info{display:inline-flex;align-items:center;gap:.3rem;}' +
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'.tiff-toolbar .tiff-page-input{width:3.2rem;padding:.2rem .3rem;border:1px solid #ccc;' +
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'border-radius:3px;text-align:center;font-size:.85rem;}' +
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'.tiff-toolbar .tiff-zoom-select{padding:.2rem .3rem;border:1px solid #ccc;border-radius:3px;' +
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'background:#fff;font-size:.85rem;}' +
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'.tiff-toolbar .tiff-spacer{flex:1;}' +
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'.tiff-viewport{flex:1;overflow:auto;background:#525659;display:flex;align-items:flex-start;' +
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'justify-content:center;padding:1rem;}' +
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'.tiff-canvas{background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.4);display:block;' +
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'image-rendering:auto;}' +
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'.tiff-error{flex:1;display:flex;align-items:center;justify-content:center;color:#900;' +
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'padding:2rem;text-align:center;}';
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function renderTiff(doc, container, arrayBuffer, opts) {
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opts = opts || {};
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injectStyles(doc, 'zddc-tiff-styles', TIFF_CSS);
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// UTIF is bundled (shared/vendor/utif.min.js) — window.UTIF is
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// available synchronously. Promise.resolve() keeps the existing
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// .then() chain shape so callers don't need to change.
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return Promise.resolve().then(function () {
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var ifds;
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try {
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ifds = window.UTIF.decode(arrayBuffer);
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} catch (e) {
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container.innerHTML = '<div class="tiff-error">Failed to parse TIFF: '
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+ escapeHtml(e.message || e) + '</div>';
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return;
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}
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if (!ifds || !ifds.length) {
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container.innerHTML = '<div class="tiff-error">No images found in TIFF.</div>';
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return;
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}
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// Reset container to a flex column
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container.innerHTML = '';
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container.style.display = 'flex';
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container.style.flexDirection = 'column';
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container.style.minHeight = '0';
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container.style.height = '100%';
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container.style.overflow = 'hidden';
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// Toolbar
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var toolbar = doc.createElement('div');
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toolbar.className = 'tiff-toolbar';
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var btnPrev = doc.createElement('button');
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btnPrev.className = 'tiff-btn'; btnPrev.type = 'button';
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btnPrev.title = 'Previous page'; btnPrev.textContent = '◀';
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var pageInfo = doc.createElement('span');
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pageInfo.className = 'tiff-page-info';
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var pageInput = doc.createElement('input');
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pageInput.type = 'number'; pageInput.min = '1'; pageInput.value = '1';
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pageInput.className = 'tiff-page-input';
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var pageOf = doc.createElement('span');
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pageOf.textContent = ' of ' + ifds.length;
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pageInfo.appendChild(doc.createTextNode('Page '));
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pageInfo.appendChild(pageInput);
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pageInfo.appendChild(pageOf);
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var btnNext = doc.createElement('button');
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btnNext.className = 'tiff-btn'; btnNext.type = 'button';
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btnNext.title = 'Next page'; btnNext.textContent = '▶';
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var spacer = doc.createElement('span');
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spacer.className = 'tiff-spacer';
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var btnZoomOut = doc.createElement('button');
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btnZoomOut.className = 'tiff-btn'; btnZoomOut.type = 'button';
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btnZoomOut.title = 'Zoom out'; btnZoomOut.textContent = '−';
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var zoomSelect = doc.createElement('select');
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zoomSelect.className = 'tiff-zoom-select';
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var zoomOptions = [
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['fit-width', 'Fit width'],
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['fit-page', 'Fit page'],
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['0.5', '50%'],
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['0.75', '75%'],
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['1', '100%'],
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['1.25', '125%'],
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['1.5', '150%'],
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['2', '200%'],
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['3', '300%'],
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['4', '400%']
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];
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zoomOptions.forEach(function (z) {
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var o = doc.createElement('option');
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o.value = z[0]; o.textContent = z[1];
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zoomSelect.appendChild(o);
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});
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zoomSelect.value = 'fit-width';
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var btnZoomIn = doc.createElement('button');
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btnZoomIn.className = 'tiff-btn'; btnZoomIn.type = 'button';
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btnZoomIn.title = 'Zoom in'; btnZoomIn.textContent = '+';
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toolbar.appendChild(btnPrev);
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toolbar.appendChild(pageInfo);
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toolbar.appendChild(btnNext);
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toolbar.appendChild(spacer);
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toolbar.appendChild(btnZoomOut);
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toolbar.appendChild(zoomSelect);
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toolbar.appendChild(btnZoomIn);
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// Viewport with canvas
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var viewport = doc.createElement('div');
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viewport.className = 'tiff-viewport';
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var canvas = doc.createElement('canvas');
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canvas.className = 'tiff-canvas';
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viewport.appendChild(canvas);
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container.appendChild(toolbar);
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container.appendChild(viewport);
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// Render state
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var currentPage = 0;
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var zoom = 1;
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var fitMode = 'width'; // 'width' | 'page' | null
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var decoded = new Array(ifds.length);
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function decodePage(i) {
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if (decoded[i]) return decoded[i];
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var ifd = ifds[i];
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window.UTIF.decodeImage(arrayBuffer, ifd);
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var rgba = window.UTIF.toRGBA8(ifd);
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decoded[i] = { rgba: rgba, w: ifd.width, h: ifd.height };
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return decoded[i];
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}
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function applyZoom() {
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var page = decoded[currentPage];
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if (!page) return;
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var availW = viewport.clientWidth - 32; // padding
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var availH = viewport.clientHeight - 32;
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var scale;
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if (fitMode === 'width') {
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scale = availW / page.w;
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} else if (fitMode === 'page') {
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scale = Math.min(availW / page.w, availH / page.h);
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} else {
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scale = zoom;
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}
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if (!isFinite(scale) || scale <= 0) scale = 1;
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canvas.style.width = (page.w * scale) + 'px';
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canvas.style.height = (page.h * scale) + 'px';
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}
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function renderPage() {
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var page;
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try {
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page = decodePage(currentPage);
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} catch (e) {
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container.innerHTML = '<div class="tiff-error">Failed to decode page '
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+ (currentPage + 1) + ': ' + escapeHtml(e.message || e) + '</div>';
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return;
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}
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canvas.width = page.w;
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canvas.height = page.h;
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var ctx = canvas.getContext('2d');
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var imgData = ctx.createImageData(page.w, page.h);
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imgData.data.set(page.rgba);
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ctx.putImageData(imgData, 0, 0);
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applyZoom();
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pageInput.value = String(currentPage + 1);
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btnPrev.disabled = currentPage <= 0;
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btnNext.disabled = currentPage >= ifds.length - 1;
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}
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function setZoomFromSelect() {
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var v = zoomSelect.value;
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if (v === 'fit-width') { fitMode = 'width'; }
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else if (v === 'fit-page') { fitMode = 'page'; }
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else { fitMode = null; zoom = parseFloat(v) || 1; }
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applyZoom();
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}
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function nudgeZoom(factor) {
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if (fitMode) {
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// capture current effective scale before leaving fit mode
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var page = decoded[currentPage];
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if (page) {
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var availW = viewport.clientWidth - 32;
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var availH = viewport.clientHeight - 32;
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zoom = fitMode === 'width'
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? availW / page.w
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: Math.min(availW / page.w, availH / page.h);
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} else {
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zoom = 1;
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}
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fitMode = null;
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}
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zoom = Math.max(0.1, Math.min(8, zoom * factor));
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// Match select option if any are close, else show as percent
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var matched = false;
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for (var i = 0; i < zoomSelect.options.length; i++) {
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var ov = zoomSelect.options[i].value;
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if (ov !== 'fit-width' && ov !== 'fit-page' && Math.abs(parseFloat(ov) - zoom) < 0.001) {
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zoomSelect.value = ov; matched = true; break;
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}
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}
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if (!matched) {
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// Nearest standard step
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var best = '1', bestDiff = Infinity;
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for (var j = 0; j < zoomSelect.options.length; j++) {
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var v2 = zoomSelect.options[j].value;
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if (v2 === 'fit-width' || v2 === 'fit-page') continue;
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var diff = Math.abs(parseFloat(v2) - zoom);
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if (diff < bestDiff) { bestDiff = diff; best = v2; }
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}
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zoom = parseFloat(best);
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zoomSelect.value = best;
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}
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applyZoom();
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}
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btnPrev.addEventListener('click', function () {
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if (currentPage > 0) { currentPage--; renderPage(); }
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});
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btnNext.addEventListener('click', function () {
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if (currentPage < ifds.length - 1) { currentPage++; renderPage(); }
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});
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pageInput.addEventListener('change', function () {
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var n = parseInt(pageInput.value, 10);
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if (!isNaN(n) && n >= 1 && n <= ifds.length) {
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currentPage = n - 1;
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renderPage();
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} else {
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pageInput.value = String(currentPage + 1);
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}
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});
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zoomSelect.addEventListener('change', setZoomFromSelect);
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btnZoomIn.addEventListener('click', function () { nudgeZoom(1.25); });
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btnZoomOut.addEventListener('click', function () { nudgeZoom(1 / 1.25); });
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// Keyboard nav (only when toolbar/viewport in focus path)
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container.tabIndex = 0;
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container.addEventListener('keydown', function (e) {
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if (e.target === pageInput) return;
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if (e.key === 'ArrowLeft' || e.key === 'PageUp') {
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if (currentPage > 0) { currentPage--; renderPage(); e.preventDefault(); }
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} else if (e.key === 'ArrowRight' || e.key === 'PageDown' || e.key === ' ') {
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if (currentPage < ifds.length - 1) { currentPage++; renderPage(); e.preventDefault(); }
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}
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});
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// Re-fit on viewport resize
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if (typeof (doc.defaultView && doc.defaultView.ResizeObserver) === 'function') {
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var ro = new doc.defaultView.ResizeObserver(function () { applyZoom(); });
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ro.observe(viewport);
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} else if (doc.defaultView) {
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doc.defaultView.addEventListener('resize', function () { applyZoom(); });
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}
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renderPage();
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});
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}
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// ── ZIP listing renderer ─────────────────────────────────────────────────
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var ZIP_CSS =
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'.zip-header{padding:.4rem .8rem;background:#f5f5f5;border-bottom:1px solid #ddd;' +
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'font-size:.85rem;color:#444;}' +
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'.zip-table-wrap{flex:1;overflow:auto;}' +
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'.zip-table{width:100%;border-collapse:collapse;font-size:.85rem;font-family:' +
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'-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;}' +
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'.zip-table thead th{position:sticky;top:0;background:#f0f0f0;text-align:left;' +
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'padding:.4rem .6rem;border-bottom:1px solid #ccc;cursor:pointer;user-select:none;' +
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'font-weight:600;}' +
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'.zip-table thead th:hover{background:#e6e6e6;}' +
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'.zip-table thead th.zip-sort-asc::after{content:" ▲";font-size:.7rem;color:#888;}' +
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'.zip-table thead th.zip-sort-desc::after{content:" ▼";font-size:.7rem;color:#888;}' +
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'.zip-table tbody td{padding:.3rem .6rem;border-bottom:1px solid #eee;}' +
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'.zip-table tbody tr:hover{background:#f6faff;}' +
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'.zip-table .zip-folder{color:#888;}' +
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'.zip-table .zip-name{color:#222;}' +
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'.zip-table .zip-size,.zip-table .zip-date{font-variant-numeric:tabular-nums;' +
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'white-space:nowrap;color:#555;}' +
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'.zip-table .zip-col-size,.zip-table .zip-col-date{text-align:right;}' +
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'.zip-empty{padding:2rem;text-align:center;color:#888;}';
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function renderZipListing(doc, container, arrayBuffer, opts) {
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opts = opts || {};
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injectStyles(doc, 'zddc-zip-styles', ZIP_CSS);
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// JSZip is bundled in every tool that uses preview-lib (each
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// tool's build.sh concatenates shared/vendor/jszip.min.js).
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return window.JSZip.loadAsync(arrayBuffer).then(function (zip) {
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var entries = [];
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zip.forEach(function (relativePath, zipEntry) {
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if (zipEntry.dir) return;
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var size = (zipEntry._data && zipEntry._data.uncompressedSize) || 0;
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entries.push({
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path: relativePath,
|
||
name: relativePath.split('/').pop(),
|
||
size: size,
|
||
modified: zipEntry.date instanceof Date ? zipEntry.date : null
|
||
});
|
||
});
|
||
|
||
container.innerHTML = '';
|
||
container.style.display = 'flex';
|
||
container.style.flexDirection = 'column';
|
||
container.style.minHeight = '0';
|
||
container.style.height = '100%';
|
||
container.style.overflow = 'hidden';
|
||
|
||
var totalSize = entries.reduce(function (s, e) { return s + e.size; }, 0);
|
||
|
||
var header = doc.createElement('div');
|
||
header.className = 'zip-header';
|
||
header.textContent = entries.length + ' file' + (entries.length === 1 ? '' : 's')
|
||
+ (totalSize ? ' · ' + formatSize(totalSize) + ' uncompressed' : '');
|
||
container.appendChild(header);
|
||
|
||
if (!entries.length) {
|
||
var empty = doc.createElement('div');
|
||
empty.className = 'zip-empty';
|
||
empty.textContent = '(empty archive)';
|
||
container.appendChild(empty);
|
||
return;
|
||
}
|
||
|
||
var wrap = doc.createElement('div');
|
||
wrap.className = 'zip-table-wrap';
|
||
|
||
var table = doc.createElement('table');
|
||
table.className = 'zip-table';
|
||
var thead = doc.createElement('thead');
|
||
var trh = doc.createElement('tr');
|
||
var cols = [
|
||
{ key: 'path', label: 'Name', cls: 'zip-col-name' },
|
||
{ key: 'size', label: 'Size', cls: 'zip-col-size' },
|
||
{ key: 'modified', label: 'Modified', cls: 'zip-col-date' }
|
||
];
|
||
cols.forEach(function (c) {
|
||
var th = doc.createElement('th');
|
||
th.className = c.cls;
|
||
th.dataset.key = c.key;
|
||
th.textContent = c.label;
|
||
trh.appendChild(th);
|
||
});
|
||
thead.appendChild(trh);
|
||
table.appendChild(thead);
|
||
|
||
var tbody = doc.createElement('tbody');
|
||
table.appendChild(tbody);
|
||
|
||
wrap.appendChild(table);
|
||
container.appendChild(wrap);
|
||
|
||
var sortKey = 'path';
|
||
var sortDir = 1;
|
||
|
||
function render() {
|
||
var sorted = entries.slice().sort(function (a, b) {
|
||
var av, bv;
|
||
if (sortKey === 'size') { av = a.size; bv = b.size; }
|
||
else if (sortKey === 'modified') {
|
||
av = a.modified ? a.modified.getTime() : 0;
|
||
bv = b.modified ? b.modified.getTime() : 0;
|
||
} else {
|
||
av = a.path.toLowerCase(); bv = b.path.toLowerCase();
|
||
}
|
||
if (av < bv) return -1 * sortDir;
|
||
if (av > bv) return 1 * sortDir;
|
||
return 0;
|
||
});
|
||
|
||
tbody.innerHTML = '';
|
||
sorted.forEach(function (e) {
|
||
var tr = doc.createElement('tr');
|
||
var td1 = doc.createElement('td');
|
||
var slash = e.path.lastIndexOf('/');
|
||
if (slash >= 0) {
|
||
var folder = doc.createElement('span');
|
||
folder.className = 'zip-folder';
|
||
folder.textContent = e.path.substring(0, slash + 1);
|
||
td1.appendChild(folder);
|
||
}
|
||
var name = doc.createElement('span');
|
||
name.className = 'zip-name';
|
||
name.textContent = e.name;
|
||
td1.appendChild(name);
|
||
|
||
var td2 = doc.createElement('td');
|
||
td2.className = 'zip-size';
|
||
td2.textContent = formatSize(e.size);
|
||
|
||
var td3 = doc.createElement('td');
|
||
td3.className = 'zip-date';
|
||
td3.textContent = formatDate(e.modified);
|
||
|
||
tr.appendChild(td1); tr.appendChild(td2); tr.appendChild(td3);
|
||
tbody.appendChild(tr);
|
||
});
|
||
|
||
// Update sort arrows
|
||
var ths = thead.querySelectorAll('th');
|
||
for (var i = 0; i < ths.length; i++) {
|
||
ths[i].classList.remove('zip-sort-asc', 'zip-sort-desc');
|
||
if (ths[i].dataset.key === sortKey) {
|
||
ths[i].classList.add(sortDir > 0 ? 'zip-sort-asc' : 'zip-sort-desc');
|
||
}
|
||
}
|
||
}
|
||
|
||
thead.querySelectorAll('th').forEach(function (th) {
|
||
th.addEventListener('click', function () {
|
||
var k = th.dataset.key;
|
||
if (sortKey === k) sortDir = -sortDir;
|
||
else { sortKey = k; sortDir = 1; }
|
||
render();
|
||
});
|
||
});
|
||
|
||
render();
|
||
}).catch(function (err) {
|
||
container.innerHTML = '<div class="zip-empty">Failed to read ZIP: '
|
||
+ escapeHtml(err.message || err) + '</div>';
|
||
});
|
||
}
|
||
|
||
// ── Public API ───────────────────────────────────────────────────────────
|
||
|
||
if (!root.zddc) root.zddc = {};
|
||
root.zddc.preview = {
|
||
TIFF_EXTENSIONS: TIFF_EXTENSIONS,
|
||
IMAGE_EXTENSIONS: IMAGE_EXTENSIONS,
|
||
TEXT_EXTENSIONS: TEXT_EXTENSIONS,
|
||
OFFICE_EXTENSIONS: OFFICE_EXTENSIONS,
|
||
isTiff: isTiff,
|
||
isImage: isImage,
|
||
isText: isText,
|
||
isZip: isZip,
|
||
isOffice: isOffice,
|
||
loadLibrary: loadLibrary,
|
||
renderTiff: renderTiff,
|
||
renderZipListing: renderZipListing,
|
||
formatSize: formatSize,
|
||
formatDate: formatDate
|
||
};
|
||
})(typeof window !== 'undefined' ? window : this);
|