forked from wrenn/wrenn
- Replace btoa/atob with TextEncoder/TextDecoder for binary-safe base64 encoding — fixes crash on multi-byte UTF-8 input (emoji, CJK, accents) - Auto-reconnect on abnormal WebSocket close while session is live - Cap concurrent sessions at 8 with disabled "+" button at limit - Guard all ws.send() calls with try/catch via wsSend() wrapper - Clean up input flush timer on session close and component destroy - Close all sessions when capsule stops running (isRunning → false) - Clean up orphaned display entry if DOM container fails to render
596 lines
20 KiB
Svelte
596 lines
20 KiB
Svelte
<script lang="ts">
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import { onDestroy, tick } from 'svelte';
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import { auth } from '$lib/auth.svelte';
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type Props = {
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sandboxId: string;
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isRunning: boolean;
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visible?: boolean;
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};
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let { sandboxId, isRunning, visible = true }: Props = $props();
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type ConnectionState = 'idle' | 'connecting' | 'connected' | 'disconnected' | 'error';
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type SessionDisplay = {
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id: number;
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state: ConnectionState;
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errorMessage: string | null;
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ptyTag: string | null;
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ptyPid: number | null;
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};
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type SessionInternal = {
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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term: any;
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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fitAddon: any;
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ws: WebSocket | null;
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resizeObserver: ResizeObserver | null;
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fitDebounce: ReturnType<typeof setTimeout> | null;
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inputFlushTimer: ReturnType<typeof setTimeout> | null;
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inputBuffer: string;
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};
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const MAX_SESSIONS = 8;
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let sessions = $state<SessionDisplay[]>([]);
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const internals = new Map<number, SessionInternal>();
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let activeSessionId = $state<number | null>(null);
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let nextId = 0;
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let cssLoaded = false;
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let containerRef = $state<HTMLDivElement | undefined>(undefined);
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let hasAutoCreated = false;
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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let TerminalClass: any = null;
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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let FitAddonClass: any = null;
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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let WebLinksAddonClass: any = null;
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const activeSession = $derived(sessions.find(s => s.id === activeSessionId) ?? null);
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const TERM_THEME = {
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background: '#0a0c0b',
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foreground: '#d0cdc6',
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cursor: '#5e8c58',
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cursorAccent: '#0a0c0b',
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selectionBackground: 'rgba(94, 140, 88, 0.25)',
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selectionForeground: '#eae7e2',
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selectionInactiveBackground: 'rgba(94, 140, 88, 0.12)',
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black: '#1a1e1c',
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red: '#cf8172',
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green: '#5e8c58',
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yellow: '#d4a73c',
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blue: '#5a9fd4',
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magenta: '#b07ab8',
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cyan: '#5aafb0',
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white: '#d0cdc6',
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brightBlack: '#454340',
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brightRed: '#e09585',
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brightGreen: '#89a785',
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brightYellow: '#e0c070',
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brightBlue: '#7ab8e0',
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brightMagenta: '#c898cf',
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brightCyan: '#7ac5c6',
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brightWhite: '#eae7e2',
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};
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// Binary-safe base64 encode (handles multi-byte UTF-8 from xterm onData)
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function toBase64(str: string): string {
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return btoa(
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Array.from(new TextEncoder().encode(str), (b) => String.fromCharCode(b)).join('')
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);
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}
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// Binary-safe base64 decode (handles raw PTY bytes)
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function fromBase64(b64: string): string {
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const bytes = Uint8Array.from(atob(b64), (c) => c.charCodeAt(0));
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return new TextDecoder().decode(bytes);
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}
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function getWsUrl(): string {
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const proto = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
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const token = auth.token ? `?token=${encodeURIComponent(auth.token)}` : '';
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return `${proto}//${window.location.host}/api/v1/sandboxes/${sandboxId}/pty${token}`;
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}
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function wsSend(ws: WebSocket | null, data: string) {
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try {
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if (ws?.readyState === WebSocket.OPEN) ws.send(data);
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} catch {
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// Connection closing — ignore
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}
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}
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function updateSession(id: number, updates: Partial<SessionDisplay>) {
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const idx = sessions.findIndex(s => s.id === id);
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if (idx === -1) return;
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Object.assign(sessions[idx], updates);
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}
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async function loadModules() {
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if (TerminalClass) return;
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const [{ Terminal }, { FitAddon }, { WebLinksAddon }] = await Promise.all([
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import('@xterm/xterm'),
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import('@xterm/addon-fit'),
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import('@xterm/addon-web-links')
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]);
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TerminalClass = Terminal;
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FitAddonClass = FitAddon;
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WebLinksAddonClass = WebLinksAddon;
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if (!cssLoaded) {
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await import('@xterm/xterm/css/xterm.css');
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cssLoaded = true;
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}
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}
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// Create first session when the tab becomes visible for the first time
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$effect(() => {
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if (visible && isRunning && !hasAutoCreated && containerRef) {
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hasAutoCreated = true;
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createSession();
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}
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});
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// Re-fit active terminal when tab becomes visible (after being hidden)
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$effect(() => {
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if (visible && activeSessionId !== null) {
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const int = internals.get(activeSessionId);
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if (int?.fitAddon && int.term) {
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requestAnimationFrame(() => {
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int.fitAddon.fit();
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int.term.focus();
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});
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}
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}
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});
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// Close all sessions when capsule stops running
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$effect(() => {
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if (!isRunning && sessions.length > 0) {
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// Copy IDs to avoid mutating during iteration
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const ids = sessions.map(s => s.id);
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for (const id of ids) closeSession(id);
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}
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});
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async function createSession() {
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if (!isRunning || !containerRef) return;
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if (sessions.length >= MAX_SESSIONS) return;
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await loadModules();
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const id = nextId++;
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sessions = [...sessions, {
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id,
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state: 'connecting',
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errorMessage: null,
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ptyTag: null,
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ptyPid: null,
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}];
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activeSessionId = id;
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await tick();
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const el = containerRef?.querySelector(`[data-session-id="${id}"]`) as HTMLDivElement | null;
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if (!el) {
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// DOM didn't render — clean up the orphaned display entry
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sessions = sessions.filter(s => s.id !== id);
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if (activeSessionId === id) activeSessionId = null;
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return;
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}
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const fitAddon = new FitAddonClass();
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const term = new TerminalClass({
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cursorBlink: true,
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cursorStyle: 'bar',
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cursorInactiveStyle: 'outline',
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fontFamily: "'JetBrains Mono Variable', 'JetBrains Mono', monospace",
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fontSize: 14,
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lineHeight: 1.35,
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letterSpacing: 0,
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theme: TERM_THEME,
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allowProposedApi: true,
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scrollback: 5000,
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convertEol: true,
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});
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term.loadAddon(fitAddon);
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term.loadAddon(new WebLinksAddonClass());
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term.open(el);
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const internal: SessionInternal = {
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term,
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fitAddon,
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ws: null,
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resizeObserver: null,
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fitDebounce: null,
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inputFlushTimer: null,
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inputBuffer: '',
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};
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internals.set(id, internal);
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requestAnimationFrame(() => fitAddon.fit());
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internal.resizeObserver = new ResizeObserver(() => {
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if (internal.fitDebounce) clearTimeout(internal.fitDebounce);
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internal.fitDebounce = setTimeout(() => {
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if (internal.fitAddon && internal.term && activeSessionId === id) {
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internal.fitAddon.fit();
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}
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}, 50);
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});
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internal.resizeObserver.observe(el);
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// Register input/resize handlers ONCE per terminal (not per connection).
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function flushInput() {
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const int = internals.get(id);
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if (!int) return;
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int.inputFlushTimer = null;
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if (!int.inputBuffer) return;
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wsSend(int.ws, JSON.stringify({ type: 'input', data: toBase64(int.inputBuffer) }));
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int.inputBuffer = '';
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}
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term.onData((data: string) => {
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const int = internals.get(id);
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if (!int) return;
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int.inputBuffer += data;
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if (!int.inputFlushTimer) {
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int.inputFlushTimer = setTimeout(flushInput, 50);
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}
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});
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term.onResize(({ cols, rows }: { cols: number; rows: number }) => {
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const i = internals.get(id);
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wsSend(i?.ws ?? null, JSON.stringify({ type: 'resize', cols, rows }));
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});
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connectSession(id);
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}
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function connectSession(id: number, reconnectTag?: string) {
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const int = internals.get(id);
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if (!int) return;
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const display = sessions.find(s => s.id === id);
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const tag = reconnectTag ?? display?.ptyTag;
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const ws = new WebSocket(getWsUrl());
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int.ws = ws;
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updateSession(id, { state: 'connecting', errorMessage: null });
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ws.onopen = () => {
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const { cols, rows } = int.term;
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const msg: Record<string, unknown> = {
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type: tag ? 'connect' : 'start',
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cols,
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rows,
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};
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if (tag) {
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msg.tag = tag;
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} else {
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msg.cmd = '/bin/bash';
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msg.envs = { TERM: 'xterm-256color' };
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}
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wsSend(ws, JSON.stringify(msg));
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};
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ws.onmessage = (event) => {
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try {
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const msg = JSON.parse(event.data);
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switch (msg.type) {
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case 'started':
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updateSession(id, {
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state: 'connected',
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ptyTag: msg.tag,
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ptyPid: msg.pid ?? null,
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});
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if (activeSessionId === id) int.term.focus();
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break;
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case 'output':
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if (msg.data) int.term.write(fromBase64(msg.data));
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break;
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case 'exit':
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closeSession(id);
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break;
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case 'error':
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if (msg.fatal) {
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updateSession(id, { state: 'error', errorMessage: msg.data || 'Connection error' });
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int.term.write(`\r\n\x1b[38;2;207;129;114m${msg.data}\x1b[0m\r\n`);
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}
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break;
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case 'ping':
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wsSend(ws, JSON.stringify({ type: 'pong' }));
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break;
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}
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} catch {
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// Ignore malformed messages
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}
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};
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ws.onclose = (event) => {
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const s = sessions.find(s => s.id === id);
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if (!s) return;
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// Abnormal close with a live session — auto-reconnect
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if (!event.wasClean && s.state === 'connected' && s.ptyTag) {
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updateSession(id, { state: 'connecting', errorMessage: null });
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int.term.write('\r\n\x1b[38;2;107;104;98m[reconnecting...]\x1b[0m\r\n');
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setTimeout(() => connectSession(id, s.ptyTag ?? undefined), 1000);
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return;
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}
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if (s.state === 'connected') {
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updateSession(id, { state: 'disconnected' });
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}
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};
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ws.onerror = () => {
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updateSession(id, { state: 'error', errorMessage: 'Connection lost — check that the capsule is running' });
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};
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}
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function switchTo(id: number) {
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activeSessionId = id;
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requestAnimationFrame(() => {
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const int = internals.get(id);
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if (int?.fitAddon && int.term) {
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int.fitAddon.fit();
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int.term.focus();
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}
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});
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}
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function closeSession(id: number) {
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const idx = sessions.findIndex(s => s.id === id);
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if (idx === -1) return;
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const int = internals.get(id);
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if (int) {
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if (int.fitDebounce) clearTimeout(int.fitDebounce);
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if (int.inputFlushTimer) clearTimeout(int.inputFlushTimer);
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int.resizeObserver?.disconnect();
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wsSend(int.ws, JSON.stringify({ type: 'kill' }));
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int.ws?.close();
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int.term?.dispose();
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internals.delete(id);
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}
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sessions = sessions.filter(s => s.id !== id);
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if (activeSessionId === id) {
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if (sessions.length === 0) {
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activeSessionId = null;
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} else {
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const newIdx = Math.min(idx, sessions.length - 1);
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switchTo(sessions[newIdx].id);
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}
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}
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}
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function reconnectSession(id: number) {
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const int = internals.get(id);
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const display = sessions.find(s => s.id === id);
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if (!int || !display) return;
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int.ws?.close();
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connectSession(id, display.ptyTag ?? undefined);
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}
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function statusDot(state: ConnectionState): string {
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switch (state) {
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case 'connected': return 'bg-[var(--color-accent)]';
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case 'connecting': return 'bg-[var(--color-text-tertiary)] animate-pulse';
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case 'error': return 'bg-[var(--color-red)]';
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default: return 'bg-[var(--color-text-muted)]';
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}
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}
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onDestroy(() => {
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for (const [, int] of internals) {
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if (int.fitDebounce) clearTimeout(int.fitDebounce);
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if (int.inputFlushTimer) clearTimeout(int.inputFlushTimer);
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int.resizeObserver?.disconnect();
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int.ws?.close();
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int.term?.dispose();
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}
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internals.clear();
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});
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</script>
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<style>
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.terminal-container :global(.xterm) {
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padding: 12px 4px 12px 16px;
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height: 100%;
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}
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.terminal-container :global(.xterm-viewport),
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.terminal-container :global(.xterm-screen) {
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background-color: #0a0c0b !important;
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}
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.terminal-container :global(.xterm-viewport) {
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scrollbar-width: thin;
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scrollbar-color: rgba(94, 140, 88, 0.18) transparent;
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}
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.terminal-container :global(.xterm-viewport::-webkit-scrollbar) {
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width: 6px;
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}
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.terminal-container :global(.xterm-viewport::-webkit-scrollbar-track) {
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background: transparent;
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}
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.terminal-container :global(.xterm-viewport::-webkit-scrollbar-thumb) {
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background: rgba(94, 140, 88, 0.18);
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border-radius: 3px;
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}
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.terminal-container :global(.xterm-viewport::-webkit-scrollbar-thumb:hover) {
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background: rgba(94, 140, 88, 0.32);
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}
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.tab-scroll {
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scrollbar-width: none;
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}
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.tab-scroll::-webkit-scrollbar {
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display: none;
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}
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.term-tab {
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position: relative;
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}
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.term-tab::after {
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content: '';
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position: absolute;
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right: 0;
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top: 25%;
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bottom: 25%;
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width: 1px;
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background: var(--color-border);
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}
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.term-tab:last-child::after {
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display: none;
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}
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.term-tab-active::after {
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display: none;
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}
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.term-tab:has(+ .term-tab-active)::after {
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display: none;
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}
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</style>
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<div class="flex flex-1 flex-col min-h-0">
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{#if !isRunning}
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<div class="flex flex-1 items-center justify-center">
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<div class="flex flex-col items-center gap-5 text-center">
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<div class="flex h-16 w-16 items-center justify-center rounded-[var(--radius-card)] border border-[var(--color-border-mid)] bg-[var(--color-bg-2)]" style="animation: iconFloat 3s ease-in-out infinite">
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<svg class="text-[var(--color-text-muted)]" width="28" height="28" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
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<polyline points="4 17 10 11 4 5" /><line x1="12" y1="19" x2="20" y2="19" />
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</svg>
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</div>
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<div class="flex flex-col gap-1.5">
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<span class="text-body font-medium text-[var(--color-text-secondary)]">Terminal unavailable</span>
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<span class="text-ui text-[var(--color-text-muted)]">Start the capsule to connect</span>
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</div>
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</div>
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</div>
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{:else}
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<!-- Unified session bar (hidden when no sessions) -->
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<div class="flex items-stretch bg-[var(--color-bg-1)]" style:display={sessions.length === 0 ? 'none' : 'flex'}>
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<div class="tab-scroll flex items-stretch overflow-x-auto">
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{#each sessions as session (session.id)}
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<!-- svelte-ignore a11y_no_static_element_interactions -->
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<div
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onclick={() => switchTo(session.id)}
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onkeydown={(e) => { if (e.key === 'Enter' || e.key === ' ') switchTo(session.id); }}
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role="tab"
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tabindex="0"
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aria-selected={session.id === activeSessionId}
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class="term-tab group flex shrink-0 cursor-pointer items-center gap-2.5 px-5 py-2.5 text-meta transition-colors
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{session.id === activeSessionId
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? 'term-tab-active bg-[var(--color-bg-0)] text-[var(--color-text-primary)]'
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: 'bg-[var(--color-bg-1)] text-[var(--color-text-tertiary)] hover:bg-[var(--color-bg-2)] hover:text-[var(--color-text-secondary)] border-b border-b-[var(--color-border)]'}"
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>
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{#if session.state === 'connected'}
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<span class="relative flex h-[7px] w-[7px] shrink-0">
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<span class="animate-status-ping absolute inline-flex h-full w-full rounded-full bg-[var(--color-accent)]"></span>
|
|
<span class="relative inline-flex h-[7px] w-[7px] rounded-full bg-[var(--color-accent)]"></span>
|
|
</span>
|
|
{:else if session.state === 'connecting'}
|
|
<svg class="animate-spin shrink-0 text-[var(--color-text-tertiary)]" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5"><path d="M21 12a9 9 0 1 1-6.219-8.56" /></svg>
|
|
{:else if session.state === 'error'}
|
|
<span class="h-[7px] w-[7px] shrink-0 rounded-full bg-[var(--color-red)]"></span>
|
|
{:else}
|
|
<span class="h-[7px] w-[7px] shrink-0 rounded-full bg-[var(--color-text-muted)]"></span>
|
|
{/if}
|
|
|
|
<span class="font-mono">
|
|
bash{#if session.ptyPid}<span class="text-[var(--color-text-muted)]">:{session.ptyPid}</span>{/if}
|
|
</span>
|
|
|
|
<button
|
|
onclick={(e) => { e.stopPropagation(); closeSession(session.id); }}
|
|
class="ml-0.5 flex h-5 w-5 items-center justify-center rounded-[3px] text-[var(--color-text-muted)] opacity-0 transition-all group-hover:opacity-100 hover:bg-[var(--color-bg-4)] hover:text-[var(--color-text-secondary)]"
|
|
title="Close session"
|
|
>
|
|
<svg width="11" height="11" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round">
|
|
<line x1="18" y1="6" x2="6" y2="18" /><line x1="6" y1="6" x2="18" y2="18" />
|
|
</svg>
|
|
</button>
|
|
</div>
|
|
{/each}
|
|
</div>
|
|
|
|
<button
|
|
onclick={createSession}
|
|
disabled={sessions.length >= MAX_SESSIONS}
|
|
class="flex shrink-0 items-center justify-center aspect-square self-stretch border-b border-[var(--color-border)] text-[var(--color-text-tertiary)] transition-colors hover:bg-[var(--color-bg-2)] hover:text-[var(--color-text-primary)] disabled:opacity-30 disabled:cursor-not-allowed disabled:hover:bg-transparent disabled:hover:text-[var(--color-text-tertiary)]"
|
|
title={sessions.length >= MAX_SESSIONS ? `Maximum ${MAX_SESSIONS} sessions` : 'New terminal session'}
|
|
>
|
|
<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
|
|
<line x1="12" y1="5" x2="12" y2="19" /><line x1="5" y1="12" x2="19" y2="12" />
|
|
</svg>
|
|
</button>
|
|
|
|
<div class="flex-1 border-b border-[var(--color-border)] bg-[var(--color-bg-1)]"></div>
|
|
|
|
{#if activeSession}
|
|
<div class="flex items-center gap-3 border-b border-[var(--color-border)] bg-[var(--color-bg-1)] pr-4">
|
|
{#if activeSession.state === 'error' && activeSession.errorMessage}
|
|
<span class="text-meta text-[var(--color-red)]/70">{activeSession.errorMessage}</span>
|
|
{/if}
|
|
|
|
{#if (activeSession.state === 'disconnected' || activeSession.state === 'error') && activeSession.ptyTag}
|
|
<button
|
|
onclick={() => activeSession && reconnectSession(activeSession.id)}
|
|
class="flex items-center gap-1.5 rounded-[var(--radius-button)] border border-[var(--color-border)] bg-[var(--color-bg-3)] px-3 py-1 text-meta font-medium text-[var(--color-text-secondary)] transition-colors hover:bg-[var(--color-bg-4)] hover:text-[var(--color-text-primary)]"
|
|
>
|
|
<svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
|
|
<polyline points="1 4 1 10 7 10" /><polyline points="23 20 23 14 17 14" />
|
|
<path d="M20.49 9A9 9 0 0 0 5.64 5.64L1 10m22 4l-4.64 4.36A9 9 0 0 1 3.51 15" />
|
|
</svg>
|
|
Reconnect
|
|
</button>
|
|
{/if}
|
|
|
|
{#if activeSession.ptyTag}
|
|
<span class="font-mono text-label text-[var(--color-text-muted)]">{activeSession.ptyTag}</span>
|
|
{/if}
|
|
</div>
|
|
{/if}
|
|
</div>
|
|
|
|
<!-- Terminal surfaces -->
|
|
<div class="relative flex-1 min-h-0 bg-[var(--color-bg-0)]" bind:this={containerRef}>
|
|
{#each sessions as session (session.id)}
|
|
<div
|
|
data-session-id={session.id}
|
|
class="terminal-container absolute inset-0 bg-[var(--color-bg-0)]"
|
|
style:display={session.id === activeSessionId ? 'block' : 'none'}
|
|
></div>
|
|
{/each}
|
|
|
|
{#if sessions.length === 0}
|
|
<div class="flex h-full items-center justify-center">
|
|
<div class="flex flex-col items-center gap-5 text-center">
|
|
<div class="flex h-16 w-16 items-center justify-center rounded-[var(--radius-card)] border border-[var(--color-border-mid)] bg-[var(--color-bg-2)]" style="animation: iconFloat 3s ease-in-out infinite">
|
|
<svg class="text-[var(--color-text-muted)]" width="28" height="28" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
|
|
<polyline points="4 17 10 11 4 5" /><line x1="12" y1="19" x2="20" y2="19" />
|
|
</svg>
|
|
</div>
|
|
<div class="flex flex-col gap-1.5">
|
|
<span class="text-body font-medium text-[var(--color-text-secondary)]">No active sessions</span>
|
|
<span class="text-ui text-[var(--color-text-muted)]">All terminal sessions have been closed</span>
|
|
</div>
|
|
<button
|
|
onclick={createSession}
|
|
class="mt-1 flex items-center gap-2 rounded-[var(--radius-button)] border border-[var(--color-accent)]/30 bg-[var(--color-accent-glow-mid)] px-5 py-2.5 text-ui font-semibold text-[var(--color-accent-bright)] transition-all duration-150 hover:border-[var(--color-accent)]/50 hover:bg-[var(--color-accent)]/15 hover:-translate-y-px active:translate-y-0"
|
|
>
|
|
<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
|
|
<line x1="12" y1="5" x2="12" y2="19" /><line x1="5" y1="12" x2="19" y2="12" />
|
|
</svg>
|
|
New session
|
|
</button>
|
|
</div>
|
|
</div>
|
|
{/if}
|
|
</div>
|
|
{/if}
|
|
</div>
|