feat: Electron screen share picker, instance selector, and system audio loopback
- Custom screen share picker for Electron (ScreenSharePicker.tsx) with Aether Drift design: glass-bubble footer, adaptive grid, pill tabs, border-based selection (avoids overflow clipping), hover brightness - Instance URL picker so Electron connects to any Backspace server - System audio loopback on Windows/Linux via desktopCapturer callback - macOS: video-only callback (OS blocks system audio capture) - IPC bridge for screen source enumeration and selection - Purge stale service worker caches on Electron launch
This commit is contained in:
Jannis Braun
@@ -0,0 +1,376 @@
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Backspace — Connect</title>
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<style>
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@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&display=swap');
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*, *::before, *::after {
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box-sizing: border-box;
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margin: 0;
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padding: 0;
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}
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html, body {
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height: 100%;
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overflow: hidden;
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}
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body {
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font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
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background: #0b0b10;
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color: #d8d8de;
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display: flex;
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flex-direction: column;
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user-select: none;
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-webkit-font-smoothing: antialiased;
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-moz-osx-font-smoothing: grayscale;
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}
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/* Subtle radial gradient at top — matches login page */
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body::before {
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content: '';
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position: fixed;
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inset: 0;
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background: radial-gradient(ellipse at top, rgba(124,108,246,0.06) 0%, transparent 50%);
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pointer-events: none;
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z-index: 0;
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}
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/* ── Titlebar drag strip ── */
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.titlebar {
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height: 32px;
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min-height: 32px;
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background: #0b0b10;
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-webkit-app-region: drag;
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position: relative;
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z-index: 100;
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}
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/* ── Main content area ── */
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.content {
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flex: 1;
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display: flex;
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align-items: center;
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justify-content: center;
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position: relative;
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z-index: 1;
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padding: 0 2rem 2rem;
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}
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.container {
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-webkit-app-region: no-drag;
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width: 100%;
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max-width: 480px;
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}
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/* ── Card — solid elevated surface (matches login) ── */
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.card {
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background: #252530;
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border-radius: 6px;
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padding: 2rem;
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box-shadow: 0 8px 16px rgba(0, 0, 0, 0.24);
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}
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/* ── Header ── */
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.header {
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text-align: center;
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margin-bottom: 1.5rem;
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}
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.header h1 {
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font-size: 1.5rem;
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font-weight: 700;
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color: #efefef;
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margin-bottom: 0.25rem;
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}
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.header p {
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font-size: 0.875rem;
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color: #5c5c68;
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margin-top: 0.25rem;
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}
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/* ── Form field ── */
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.field {
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margin-bottom: 1.25rem;
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}
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.field label {
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display: block;
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font-size: 0.6875rem;
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font-weight: 700;
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color: #a0a0aa;
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text-transform: uppercase;
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letter-spacing: 0.02em;
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margin-bottom: 0.5rem;
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}
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.field input {
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width: 100%;
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padding: 0.625rem 0.75rem;
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background: #111118;
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border: 1px solid rgba(255, 255, 255, 0.06);
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border-radius: 4px;
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color: #efefef;
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font-family: inherit;
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font-size: 0.875rem;
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outline: none;
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box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.25);
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transition: box-shadow 0.15s ease, border-color 0.15s ease;
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}
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.field input::placeholder {
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color: #5c5c68;
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}
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.field input:focus {
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box-shadow: 0 0 0 2px #7c6cf6, inset 0 1px 2px rgba(0, 0, 0, 0.25);
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border-color: rgba(124, 108, 246, 0.3);
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}
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.field input:disabled {
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opacity: 0.5;
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}
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/* ── Button — accent-primary with white text (matches login) ── */
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.connect-btn {
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width: 100%;
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padding: 0.625rem;
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background: #7c6cf6;
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color: #ffffff;
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border: none;
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border-radius: 4px;
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font-family: inherit;
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font-size: 0.875rem;
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font-weight: 500;
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cursor: pointer;
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transition: background 0.15s ease, opacity 0.15s ease;
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}
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.connect-btn:hover:not(:disabled) {
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background: rgba(124, 108, 246, 0.8);
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}
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.connect-btn:disabled {
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opacity: 0.5;
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cursor: not-allowed;
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}
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/* ── Error display — matches login error style ── */
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.error-box {
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margin-top: 1rem;
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padding: 0.75rem;
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background: rgba(253, 164, 175, 0.1);
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border: 1px solid rgba(253, 164, 175, 0.3);
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border-radius: 4px;
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color: #fca5a5;
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font-size: 0.875rem;
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text-align: center;
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}
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/* ── Instance info — success card with mint accent ── */
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.instance-info {
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margin-top: 1rem;
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padding: 0.75rem;
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background: rgba(134, 239, 172, 0.1);
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border: 1px solid rgba(134, 239, 172, 0.25);
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border-radius: 4px;
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text-align: center;
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}
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.instance-info .name {
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font-weight: 600;
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color: #efefef;
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font-size: 0.875rem;
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}
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.instance-info .version {
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font-size: 0.75rem;
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color: #a0a0aa;
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margin-top: 0.125rem;
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}
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/* ── Loading state ── */
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.loading-text {
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margin-top: 1rem;
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text-align: center;
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font-size: 0.8125rem;
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color: #5c5c68;
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}
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.spinner {
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display: inline-block;
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width: 14px;
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height: 14px;
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border: 2px solid rgba(92, 92, 104, 0.3);
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border-top-color: #5c5c68;
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border-radius: 50%;
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animation: spin 0.6s linear infinite;
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vertical-align: middle;
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margin-right: 0.375rem;
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}
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@keyframes spin {
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to { transform: rotate(360deg); }
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}
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/* ── Autofill dark theme ── */
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input:-webkit-autofill,
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input:-webkit-autofill:hover,
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input:-webkit-autofill:focus {
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-webkit-text-fill-color: #efefef;
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-webkit-box-shadow: 0 0 0px 1000px #111118 inset;
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transition: background-color 5000s ease-in-out 0s;
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}
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/* ── Selection ── */
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::selection {
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background: rgba(134, 239, 172, 0.25);
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color: #efefef;
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}
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/* ── Accessibility: reduced transparency ── */
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@media (prefers-reduced-transparency: reduce) {
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.card {
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background: #252530;
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}
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}
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</style>
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</head>
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<body>
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<div class="titlebar"></div>
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<div class="content">
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<div class="container">
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<div class="card">
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<div class="header">
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<h1>Welcome to Backspace</h1>
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<p>Connect to your instance</p>
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</div>
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<form id="picker-form">
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<div class="field">
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<label for="url-input">Instance URL</label>
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<input
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id="url-input"
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type="text"
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placeholder="backspace.example.com"
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autocomplete="off"
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spellcheck="false"
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autofocus
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/>
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</div>
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<button type="submit" class="connect-btn" id="connect-btn">Connect</button>
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</form>
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<div id="instance-info" class="instance-info" style="display: none;">
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<div class="name" id="instance-name"></div>
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<div class="version" id="instance-version"></div>
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</div>
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<div id="error-box" class="error-box" style="display: none;"></div>
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<div id="loading" class="loading-text" style="display: none;">
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<span class="spinner"></span> Connecting...
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</div>
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</div>
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</div>
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</div>
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<script>
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const form = document.getElementById('picker-form');
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const input = document.getElementById('url-input');
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const btn = document.getElementById('connect-btn');
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const errorBox = document.getElementById('error-box');
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const loadingEl = document.getElementById('loading');
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const infoEl = document.getElementById('instance-info');
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const nameEl = document.getElementById('instance-name');
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const versionEl = document.getElementById('instance-version');
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function normalizeUrl(raw) {
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let url = raw.trim();
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if (!url) return '';
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// Strip trailing slashes
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url = url.replace(/\/+$/, '');
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// Prepend https:// if no protocol
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if (!/^https?:\/\//i.test(url)) {
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url = 'https://' + url;
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}
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return url;
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}
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function showError(text) {
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errorBox.textContent = text;
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errorBox.style.display = 'block';
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loadingEl.style.display = 'none';
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}
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function hideError() {
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errorBox.style.display = 'none';
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}
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function setLoading(loading) {
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input.disabled = loading;
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btn.disabled = loading;
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loadingEl.style.display = loading ? 'block' : 'none';
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if (loading) {
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hideError();
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}
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}
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form.addEventListener('submit', async (e) => {
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e.preventDefault();
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const url = normalizeUrl(input.value);
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if (!url) {
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showError('Please enter an instance URL');
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return;
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}
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infoEl.style.display = 'none';
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hideError();
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setLoading(true);
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try {
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const res = await fetch(url + '/api/instance/info', {
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signal: AbortSignal.timeout(10000),
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});
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if (!res.ok) {
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throw new Error('Server returned ' + res.status);
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}
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const data = await res.json();
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if (!data.name) {
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throw new Error('Not a Backspace instance');
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}
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// Show instance info
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nameEl.textContent = data.name;
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versionEl.textContent = data.version ? 'v' + data.version : '';
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infoEl.style.display = 'block';
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loadingEl.style.display = 'none';
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// Save and navigate
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if (window.backspace && window.backspace.setInstanceUrl) {
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await window.backspace.setInstanceUrl(url);
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}
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} catch (err) {
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setLoading(false);
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infoEl.style.display = 'none';
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if (err.name === 'TimeoutError' || err.name === 'AbortError') {
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showError('Connection timed out — check the URL and try again');
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} else if (err.message === 'Failed to fetch' || err.name === 'TypeError') {
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showError('Could not connect — check the URL and try again');
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} else {
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showError('Could not connect — ' + err.message);
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}
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}
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});
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</script>
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</body>
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</html>
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