Daniele
71e1a26b08
Nightly Build / build (push) Successful in 7m59s
On iOS the file viewer showed only the first page of a PDF, with no way to scroll to the rest — the document had to be downloaded and opened in another app. The cause was not ours: WebKit refuses to mount its PDF viewer inside an <iframe>/<object>/<embed> and paints a static first-page thumbnail instead. That hits Safari on iOS and every WKWebView, so the native shell too. The full viewer only exists for a top-level navigation. The desktop browsers do mount a viewer, but each mounts its own — Chrome's toolbar, Safari's page-index sidebar — so the same document also looked different on every machine. Both are answered by drawing the pages ourselves. New <pdf-view> (web/components/shared/pdf-view.js) renders a continuous scroll of canvas pages on the vendored pdf.js, with a zoom control and a page counter, and replaces the iframe for both native .pdf files and server-compiled LaTeX. Three properties are load-bearing: - pdf.js is imported lazily (~450 KB + a 1.2 MB worker), so a session that never opens a PDF never pays for it. - Canvases are created and destroyed as pages scroll. iOS caps the total canvas backing store a page may hold and silently blanks canvases past it, so an eager render would come out empty on exactly the platform this was written for. Off-screen pages keep only a correctly-sized box, which is also what keeps the scrollbar honest. - The text layer (selection, in-page find) is best-effort: it is transparent DOM over the pixels, so its failures are swallowed rather than surfaced. Vendored from pdfjs-dist 6.2.108: pdf.min.mjs, pdf.worker.min.mjs, the standard-font data (needed by PDFs that reference Helvetica/Times without embedding them) and the .textLayer block of pdf_viewer.css. CJK cmaps are deliberately left out. pdf.js 6 needs Safari/iOS 17.4+. Verified in headless Chromium against both a synthetic 12-page PDF using non-embedded Helvetica and a real 14-page paper with embedded fonts and figures: all pages present, last page renders after scrolling, page 1 released off-screen, text layer populated, zoom re-renders at the new scale, no JS errors.
454 lines
12 KiB
CSS
454 lines
12 KiB
CSS
/* ── File viewer page ───────────────────────────────────────────────────────── */
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.fv-page {
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flex-direction: column;
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min-height: 0;
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}
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.fv-title {
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font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
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font-size: 0.95rem;
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font-weight: 500;
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overflow: hidden;
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text-overflow: ellipsis;
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white-space: nowrap;
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opacity: 0.9;
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margin: 0;
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/* RTL flips the ellipsis to the *start*, so a long path keeps its tail (the
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filename) visible — `<bdi>` around the path preserves left-to-right order. */
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direction: rtl;
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text-align: left;
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flex: 1 1 auto;
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min-width: 0;
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}
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.fv-download-btn {
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display: flex;
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align-items: center;
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justify-content: center;
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width: 32px;
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height: 32px;
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padding: 0 !important;
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border-radius: 6px !important;
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flex-shrink: 0;
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}
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.fv-body {
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flex: 1 1 auto;
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overflow: auto;
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position: relative;
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min-height: 0;
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}
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.fv-state {
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height: 100%;
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display: flex;
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flex-direction: column;
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align-items: center;
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justify-content: center;
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text-align: center;
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padding: 2rem;
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font-size: 0.9rem;
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}
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/* ── Markdown preview ────────────────────────────────────────────────────────── */
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.fv-md-wrap {
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display: flex;
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flex-direction: column;
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min-height: 100%;
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}
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/* View | Edit tab bar — shown only when the caller can write the file. */
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.fv-md-tabs {
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display: flex;
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align-items: center;
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gap: 0.15rem;
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padding: 0.4rem 1rem 0;
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border-bottom: 1px solid var(--bs-border-color);
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flex-shrink: 0;
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}
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.fv-md-tab {
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appearance: none;
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background: none;
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border: none;
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border-bottom: 2px solid transparent;
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padding: 0.35rem 0.85rem;
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margin-bottom: -1px;
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font-size: 0.85rem;
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color: var(--bs-secondary-color);
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cursor: pointer;
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border-radius: 4px 4px 0 0;
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}
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.fv-md-tab:hover { color: var(--bs-body-color); }
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.fv-md-tab.active {
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color: var(--bs-body-color);
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border-bottom-color: var(--accent);
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font-weight: 600;
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}
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.fv-md-dirty-dot {
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width: 7px;
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height: 7px;
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border-radius: 50%;
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background: var(--accent);
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margin-left: 0.35rem;
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flex-shrink: 0;
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}
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/* ── Source editor (Edit tab) ───────────────────────────────────────────────── */
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.fv-edit {
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flex: 1 1 auto;
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display: flex;
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flex-direction: column;
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min-height: 0;
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padding: 0.75rem 1rem 1rem;
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gap: 0.5rem;
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}
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.fv-edit-textarea {
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flex: 1 1 auto;
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min-height: 50vh;
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width: 100%;
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resize: vertical;
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padding: 0.85rem 1rem;
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font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
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font-size: 0.85rem;
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line-height: 1.55;
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tab-size: 4;
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color: var(--bs-body-color);
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background: var(--bs-secondary-bg);
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border: 1px solid var(--bs-border-color);
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border-radius: 6px;
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white-space: pre;
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overflow-wrap: normal;
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overflow: auto;
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}
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.fv-edit-textarea:focus {
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outline: none;
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border-color: var(--accent);
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box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent);
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}
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.fv-edit-toolbar {
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display: flex;
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align-items: center;
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gap: 0.5rem;
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flex-shrink: 0;
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}
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.fv-edit-hint {
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font-size: 0.78rem;
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color: var(--bs-secondary-color);
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margin-left: auto;
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}
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/* ── Conflict banner (remote changed while editing) ─────────────────────────── */
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.fv-conflict-banner {
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display: flex;
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flex-wrap: wrap;
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align-items: center;
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gap: 0.6rem;
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padding: 0.6rem 0.85rem;
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background: var(--bs-warning-bg-subtle, #fff3cd);
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border: 1px solid var(--bs-warning-border-subtle, #ffe69c);
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color: var(--bs-emphasis-color, inherit);
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border-radius: 6px;
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flex-shrink: 0;
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}
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.fv-conflict-banner > .bi {
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color: var(--bs-warning-text-emphasis, #664d03);
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font-size: 1.05rem;
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flex-shrink: 0;
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}
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.fv-conflict-text {
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flex: 1 1 200px;
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font-size: 0.82rem;
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min-width: 0;
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}
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.fv-conflict-actions {
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display: flex;
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flex-wrap: wrap;
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gap: 0.4rem;
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flex-shrink: 0;
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}
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.fv-md {
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max-width: 100%;
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padding: 1.5rem 2rem;
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line-height: 1.6;
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font-size: 0.8rem;
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}
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.fv-md > *:first-child { margin-top: 0; }
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.fv-md > *:last-child { margin-bottom: 0; }
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.fv-md h1,
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.fv-md h2,
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.fv-md h3,
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.fv-md h4 { margin: 1.2rem 0 0.5rem; line-height: 1.3; }
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.fv-md h1 { font-size: 1.5em; }
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.fv-md h2 { font-size: 1.3em; }
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.fv-md h3 { font-size: 1.15em; }
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.fv-md h4 { font-size: 1em; }
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.fv-md p { margin: 0.5rem 0; }
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.fv-md ul,
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.fv-md ol { margin: 0.5rem 0; padding-left: 1.5rem; }
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.fv-md li { margin: 0.2rem 0; }
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.fv-md code {
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font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
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font-size: 0.85em;
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background: var(--bs-secondary-bg);
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padding: 0.1rem 0.35rem;
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border-radius: 3px;
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}
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.fv-md pre {
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background: var(--bs-secondary-bg);
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padding: 0.85rem 1rem;
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border-radius: 6px;
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overflow: auto;
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margin: 0.75rem 0;
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}
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.fv-md pre code { background: none; padding: 0; font-size: inherit; }
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.fv-md blockquote {
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border-left: 3px solid var(--bs-border-color);
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margin: 0.75rem 0;
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padding: 0.25rem 0 0.25rem 1rem;
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color: var(--bs-secondary-color);
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}
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.fv-md hr { border: none; border-top: 1px solid var(--bs-border-color); margin: 1.25rem 0; }
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.fv-md a { color: var(--accent); text-decoration: underline; }
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.fv-md strong { font-weight: 700; }
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.fv-md em { font-style: italic; }
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.fv-md img { max-width: 100%; border-radius: 4px; }
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.fv-md table {
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border-collapse: collapse;
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margin: 0.75rem 0;
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}
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.fv-md th,
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.fv-md td {
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border: 1px solid var(--bs-border-color);
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padding: 0.4rem 0.6rem;
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}
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/* ── Code/text preview ───────────────────────────────────────────────────────── */
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.fv-code {
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margin: 0;
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padding: 1.25rem 1.5rem;
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font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
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font-size: 0.85rem;
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line-height: 1.55;
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white-space: pre;
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overflow: auto;
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background: var(--bs-secondary-bg);
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color: var(--bs-body-color);
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min-height: 100%;
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tab-size: 4;
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}
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/* Header action buttons (mode toggle + download) sit in one row. */
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.fv-header-actions {
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display: flex;
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align-items: center;
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gap: 0.4rem;
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flex-shrink: 0;
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}
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/* ── PDF preview ─────────────────────────────────────────────────────────────── */
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/* PDFs are drawn by <pdf-view> (web/components/shared/pdf-view.js) on canvas, not
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handed to the browser's built-in viewer: WebKit paints only a static first page
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inside a frame — which is why iOS showed page 1 and nothing else — and the
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desktop browsers each mount a different viewer chrome. `.fv-pdf` is the block
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the viewer body gives it; everything below is that component's own layout. */
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.fv-pdf {
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display: block;
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width: 100%;
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height: 100%;
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min-height: 0;
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}
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.pdfv {
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display: flex;
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flex-direction: column;
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height: 100%;
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min-height: 0;
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}
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.pdfv-toolbar {
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display: flex;
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align-items: center;
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gap: 0.4rem;
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padding: 0.35rem 0.6rem;
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border-bottom: 1px solid var(--bs-border-color);
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background: var(--bs-tertiary-bg);
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flex-shrink: 0;
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}
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.pdfv-btn {
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border: 1px solid var(--bs-border-color);
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background: var(--bs-body-bg);
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color: var(--bs-body-color);
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border-radius: var(--radius-sm);
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padding: 0.15rem 0.5rem;
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line-height: 1.4;
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cursor: pointer;
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}
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.pdfv-btn:hover:not(:disabled) { background: var(--bs-secondary-bg); }
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.pdfv-btn:disabled { opacity: 0.4; cursor: default; }
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.pdfv-zoom {
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min-width: 3.5rem;
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text-align: center;
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font-size: 0.85rem;
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color: var(--bs-secondary-color);
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font-variant-numeric: tabular-nums;
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}
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.pdfv-pageno {
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margin-left: auto;
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font-size: 0.85rem;
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color: var(--bs-secondary-color);
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font-variant-numeric: tabular-nums;
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}
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/* The scroll root. `position: relative` makes it the offsetParent of every page
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box, which is what lets the component compare `offsetTop` against `scrollTop`
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when it decides which pages hold pixels. */
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.pdfv-scroll {
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position: relative;
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flex: 1;
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min-height: 0;
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overflow: auto;
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overscroll-behavior: contain;
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-webkit-overflow-scrolling: touch;
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background: var(--bs-secondary-bg);
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}
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/* `width: max-content` + `min-width: 100%` is what makes zoom usable: with a
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plain `align-items: center`, a page wider than the scroll box overflows on
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*both* sides and the left half becomes unreachable — centring happens before
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scrolling exists. Growing this box to the widest page instead gives an honest
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horizontal scroll range, while min-width keeps pages centred when they fit. */
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.pdfv-pages {
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display: flex;
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flex-direction: column;
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align-items: center;
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width: max-content;
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min-width: 100%;
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gap: 0.6rem;
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padding: 0.6rem;
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}
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/* A page box is sized before it is drawn, so the scrollbar is honest from the
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start and a page that is currently released leaves no gap. The pdf.js text
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layer positions itself against these CSS variables. */
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.pdfv-page {
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position: relative;
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background: #fff;
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box-shadow: 0 1px 6px rgb(0 0 0 / 0.35);
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overflow: hidden;
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--user-unit: 1;
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--total-scale-factor: calc(var(--scale-factor) * var(--user-unit));
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--scale-round-x: 1px;
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--scale-round-y: 1px;
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}
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.pdfv-canvas {
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display: block;
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}
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.pdfv-page-failed::after {
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content: "!";
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position: absolute;
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inset: 0;
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display: flex;
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align-items: center;
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justify-content: center;
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color: var(--bs-danger, #b91c1c);
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font-size: 2rem;
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}
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.pdfv-error-detail {
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margin-top: 0.4rem;
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font-size: 0.8rem;
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opacity: 0.75;
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word-break: break-word;
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}
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/* ── HTML live preview ───────────────────────────────────────────────────────── */
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/* Rendered in an origin-isolated iframe (srcdoc + sandbox="allow-scripts").
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White canvas so pages that don't set their own background stay legible. */
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.fv-html {
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width: 100%;
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height: 100%;
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border: none;
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display: block;
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background: #fff;
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}
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/* ── LaTeX compile-error banner (shown above the source fallback) ─────────────── */
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.fv-compile-error {
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margin: 0;
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padding: 0.5rem 1.5rem;
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background: var(--bs-warning-bg-subtle, #fff3cd);
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border-bottom: 1px solid var(--bs-border-color);
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font-size: 0.85rem;
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}
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.fv-compile-error > summary {
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cursor: pointer;
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user-select: none;
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padding: 0.25rem 0;
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}
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.fv-compile-error > pre {
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margin: 0.5rem 0 0.75rem;
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padding: 0.75rem 1rem;
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max-height: 40vh;
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overflow: auto;
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background: var(--bs-secondary-bg);
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border-radius: 6px;
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font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
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font-size: 0.8rem;
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white-space: pre-wrap;
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word-break: break-word;
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}
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/* ── Image preview ───────────────────────────────────────────────────────────── */
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.fv-image-wrap {
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height: 100%;
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display: flex;
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align-items: center;
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justify-content: center;
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padding: 1rem;
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background: var(--bs-secondary-bg);
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}
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.fv-image {
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max-width: 100%;
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max-height: 100%;
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object-fit: contain;
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border-radius: 4px;
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box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
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}
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/* SVG renders in a sandboxed iframe; the SVG root fills the iframe viewport and
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scales to its viewBox. White canvas so light-on-transparent SVGs stay legible. */
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.fv-svg {
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width: 100%;
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height: 100%;
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border: none;
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background: #fff;
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border-radius: 4px;
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box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
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}
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