Files
Skald-Circle/web/index.html
T
Daniele 71e1a26b08
Nightly Build / build (push) Successful in 7m59s
fix(ui): render PDFs with pdf.js instead of an iframe
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.
2026-08-08 17:16:15 +01:00

134 lines
5.7 KiB
HTML

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Skald</title>
<link rel="icon" href="/assets/icons/favicon.ico" sizes="any" />
<link rel="icon" href="/assets/icons/icon-192.png" type="image/png" />
<!-- Redirect mobile browsers to the mobile UI -->
<script>
(function () {
var isMobile = /Android|iPhone|iPad|iPod/i.test(navigator.userAgent) || window.innerWidth < 768;
if (isMobile) window.location.replace('/mobile.html');
})();
</script>
<!-- Apply theme before render to avoid flash. localStorage wins over OS preference. -->
<script>
(function () {
const saved = localStorage.getItem('theme');
const dark = saved ? saved === 'dark' : window.matchMedia('(prefers-color-scheme: dark)').matches;
document.documentElement.setAttribute('data-bs-theme', dark ? 'dark' : 'light');
window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', e => {
if (!localStorage.getItem('theme')) {
document.documentElement.setAttribute('data-bs-theme', e.matches ? 'dark' : 'light');
}
});
})();
</script>
<!-- Font -->
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap" />
<!-- Bootstrap 5 -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" />
<!-- Bootstrap Icons -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css" />
<link rel="stylesheet" href="css/variables.css" />
<link rel="stylesheet" href="css/topbar.css" />
<link rel="stylesheet" href="css/sidebar.css" />
<link rel="stylesheet" href="css/copilot.css" />
<link rel="stylesheet" href="css/copilot-messages.css" />
<link rel="stylesheet" href="css/copilot-input.css" />
<link rel="stylesheet" href="css/agent-tasks.css" />
<link rel="stylesheet" href="css/dialogs.css" />
<link rel="stylesheet" href="css/page-shell.css" />
<link rel="stylesheet" href="css/page-header.css" />
<link rel="stylesheet" href="css/connectors.css" />
<link rel="stylesheet" href="css/models-hub.css" />
<link rel="stylesheet" href="css/tasks/base.css" />
<link rel="stylesheet" href="css/tasks/history.css" />
<link rel="stylesheet" href="css/models-llm.css" />
<link rel="stylesheet" href="css/models-image.css" />
<link rel="stylesheet" href="css/llm-providers.css" />
<link rel="stylesheet" href="css/agents.css" />
<link rel="stylesheet" href="css/approval-groups.css" />
<link rel="stylesheet" href="css/approval-rules.css" />
<link rel="stylesheet" href="css/inbox-cards.css" />
<link rel="stylesheet" href="css/config.css" />
<link rel="stylesheet" href="css/system-agents.css" />
<link rel="stylesheet" href="css/agent-inbox.css" />
<link rel="stylesheet" href="css/home.css" />
<link rel="stylesheet" href="css/llm-requests.css" />
<link rel="stylesheet" href="css/setup-page.css" />
<link rel="stylesheet" href="css/users-roles.css" />
<link rel="stylesheet" href="css/projects/base.css" />
<link rel="stylesheet" href="css/projects/board.css" />
<link rel="stylesheet" href="css/file-viewer.css" />
<!-- pdf.js TextLayer's DOM contract (selectable text over the rendered pages). -->
<link rel="stylesheet" href="/vendor/pdf-text-layer.css" />
<script src="/vendor/cronstrue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.7/dist/chart.umd.min.js"></script>
<script type="importmap">
{
"imports": {
"lit": "/vendor/lit-all.min.js",
"lit/directives/unsafe-html.js": "/vendor/lit-all.min.js",
"lit/directives/keyed.js": "/vendor/lit-all.min.js",
"marked": "/vendor/marked.esm.js",
"dompurify": "/vendor/purify.es.mjs",
"cronstrue": "/vendor/cronstrue.mjs"
}
}
</script>
</head>
<body>
<div id="app">
<app-topbar></app-topbar>
<div class="app-body">
<app-sidebar></app-sidebar>
<div class="app-workspace" id="app-workspace"></div>
<agents-page></agents-page>
<users-page></users-page>
<roles-page></roles-page>
<shared-folders-page></shared-folders-page>
<connectors-page></connectors-page>
<connector-detail-page></connector-detail-page>
<plugin-page-host></plugin-page-host>
<plugin-catalog-page></plugin-catalog-page>
<plugin-detail-page></plugin-detail-page>
<marketplace-page></marketplace-page>
<profile-page style="display:none"></profile-page>
<llm-providers-page></llm-providers-page>
<models-hub-page></models-hub-page>
<tasks-page></tasks-page>
<approval-groups-page></approval-groups-page>
<approval-rules-page></approval-rules-page>
<config-page></config-page>
<dashboard-page></dashboard-page>
<agent-inbox-page></agent-inbox-page>
<llm-requests-page></llm-requests-page>
<session-detail-page style="display:none"></session-detail-page>
<system-agents-page style="display:none"></system-agents-page>
<projects-page style="display:none"></projects-page>
<file-viewer-page style="display:none"></file-viewer-page>
<tool-detail-page style="display:none"></tool-detail-page>
<app-copilot></app-copilot>
</div>
</div>
<setup-page style="display:none"></setup-page>
<login-page style="display:none"></login-page>
<script type="module" src="app.js"></script>
</body>
</html>