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Migrate frontend from Svelte 5 to React 18

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After hours of fighting Svelte 5's prop-reactivity through the
recursive Pane → SplitNode → LeafPane chain (props captured at
mount, never updated; context+getter pattern crashed; DOM-direct
workarounds created zombie-split click-intercept bugs), we
checkpointed the Svelte version (branch svelte-archive at e9015b2,
tarball at D:\archives\tiletopia-svelte-2026-05-22.tar.gz) and
rewrote the frontend in React.

Kept verbatim:
- All of src-tauri/ (Rust backend, Tauri config, icons)
- scripts/ (make-icon.py, release.sh)
- README.md, CLAUDE.md, memory.md
- src/lib/layout/tree.ts (pure TS — 43 tests still pass)
- src/ipc.ts (Tauri command wrappers)

Rewrote in React:
- src/App.tsx (top-level state via useState, OrchestrationProvider
  for descendants via React.Context)
- src/lib/layout/orchestration.tsx (React Context API for shared
  state — known-reliable reactivity, no Svelte 5 wall)
- src/lib/layout/Pane.tsx (recursive dispatcher)
- src/lib/layout/SplitNode.tsx (draggable gutter, local ratio state)
- src/lib/layout/LeafPane.tsx (toolbar + XtermPane)
- src/components/XtermPane.tsx (xterm.js wrapper, refs for callbacks)
- src/components/Notifications.tsx, Palette.tsx

Build: Vite + @vitejs/plugin-react. TypeScript strict. Same Tauri 2
config. Verified: pnpm check (clean), pnpm test (43/43 pass).
Not yet verified: pnpm tauri dev — that requires the Windows host.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
megaproxy 2026-05-22 18:05:05 +01:00
parent e9015b2790
commit 774b8633dc
32 changed files with 2087 additions and 1825 deletions
Download patch file Download diff file Expand all files Collapse all files

6
index.html
View file

@ -1,4 +1,4 @@
<!DOCTYPE html>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
@ -6,7 +6,7 @@
<title>tiletopia</title>
</head>
<body>
<div id="app"></div>
<script type="module" src="/src/main.ts"></script>
<div id="root"></div>
<script type="module" src="/src/main.tsx"></script>
</body>
</html>

15
package.json
View file

@ -5,24 +5,25 @@
"type": "module",
"scripts": {
"dev": "vite",
"build": "vite build",
"build": "tsc -b && vite build",
"preview": "vite preview",
"check": "svelte-check --tsconfig ./tsconfig.json",
"test": "vitest run",
"test:watch": "vitest",
"check": "tsc --noEmit",
"tauri": "tauri"
},
"dependencies": {
"@tauri-apps/api": "^2.0.0",
"@xterm/addon-fit": "^0.10.0",
"@xterm/xterm": "^5.5.0"
"@xterm/xterm": "^5.5.0",
"react": "^18.3.0",
"react-dom": "^18.3.0"
},
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"typescript": "^5.6.0",
"vite": "^5.4.0",
"vitest": "^2.0.0"

621
pnpm-lock.yaml generated
View file

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dependencies:
'@jridgewell/sourcemap-codec': 1.5.5
mri@1.2.0: {}
ms@2.1.3: {}
nanoid@3.3.12: {}
node-releases@2.0.45: {}
pathe@1.1.2: {}
pathval@2.0.1: {}
@ -1169,7 +1383,17 @@ snapshots:
picocolors: 1.1.1
source-map-js: 1.2.1
readdirp@4.1.2: {}
react-dom@18.3.1(react@18.3.1):
dependencies:
loose-envify: 1.4.0
react: 18.3.1
scheduler: 0.23.2
react-refresh@0.17.0: {}
react@18.3.1:
dependencies:
loose-envify: 1.4.0
rollup@4.60.4:
dependencies:
@ -1202,9 +1426,11 @@ snapshots:
'@rollup/rollup-win32-x64-msvc': 4.60.4
fsevents: 2.3.3
sade@1.8.1:
scheduler@0.23.2:
dependencies:
mri: 1.2.0
loose-envify: 1.4.0
semver@6.3.1: {}
siginfo@2.0.0: {}
@ -1214,39 +1440,6 @@ snapshots:
std-env@3.10.0: {}
svelte-check@4.4.8(svelte@5.55.9)(typescript@5.9.3):
dependencies:
'@jridgewell/trace-mapping': 0.3.31
chokidar: 4.0.3
fdir: 6.5.0
picocolors: 1.1.1
sade: 1.8.1
svelte: 5.55.9
typescript: 5.9.3
transitivePeerDependencies:
- picomatch
svelte@5.55.9:
dependencies:
'@jridgewell/remapping': 2.3.5
'@jridgewell/sourcemap-codec': 1.5.5
'@sveltejs/acorn-typescript': 1.0.10(acorn@8.16.0)
'@types/estree': 1.0.9
'@types/trusted-types': 2.0.7
acorn: 8.16.0
aria-query: 5.3.1
axobject-query: 4.1.0
clsx: 2.1.1
devalue: 5.8.1
esm-env: 1.2.2
esrap: 2.2.9
is-reference: 3.0.3
locate-character: 3.0.0
magic-string: 0.30.21
zimmerframe: 1.1.4
transitivePeerDependencies:
- '@typescript-eslint/types'
tinybench@2.9.0: {}
tinyexec@0.3.2: {}
@ -1259,6 +1452,12 @@ snapshots:
typescript@5.9.3: {}
update-browserslist-db@1.2.3(browserslist@4.28.2):
dependencies:
browserslist: 4.28.2
escalade: 3.2.0
picocolors: 1.1.1
vite-node@2.1.9:
dependencies:
cac: 6.7.14
@ -1285,10 +1484,6 @@ snapshots:
optionalDependencies:
fsevents: 2.3.3
vitefu@1.1.3(vite@5.4.21):
optionalDependencies:
vite: 5.4.21
vitest@2.1.9:
dependencies:
'@vitest/expect': 2.1.9
@ -1327,4 +1522,4 @@ snapshots:
siginfo: 2.0.0
stackback: 0.0.2
zimmerframe@1.1.4: {}
yallist@3.1.1: {}

69
src/App.css Normal file
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@ -0,0 +1,69 @@
.app {
display: flex;
flex-direction: column;
height: 100vh;
background: #0c0c0c;
}
.titlebar {
flex: 0 0 auto;
display: flex;
align-items: center;
gap: 12px;
padding: 6px 12px;
background: #1a1a1a;
border-bottom: 1px solid #2a2a2a;
font-size: 12px;
color: #aaa;
user-select: none;
}
.titlebar .label {
font-weight: 600;
color: #ddd;
}
.distros, .presets {
display: flex;
gap: 4px;
align-items: center;
}
.distro-btn, .preset-btn, .palette-btn {
font: inherit;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
font-size: 11px;
background: #222;
color: #aaa;
border: 1px solid #333;
border-radius: 3px;
padding: 2px 8px;
cursor: pointer;
}
.distro-btn:hover, .preset-btn:hover, .palette-btn:hover {
background: #2a2a2a;
color: #ddd;
}
.distro-btn.active {
background: #1a3a5c;
color: #cce6ff;
border-color: #2a5a8c;
}
.preset-btn {
min-width: 28px;
text-align: center;
}
.muted {
color: #666;
font-style: italic;
}
.layout-info {
margin-left: auto;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
color: #777;
font-size: 11px;
}
.pane-wrap {
flex: 1 1 auto;
min-height: 0;
position: relative;
}

380
src/App.svelte
View file

@ -1,380 +0,0 @@
<script lang="ts">
import { onMount } from "svelte";
import {
listDistros,
saveWorkspace,
loadWorkspace,
writeToPane,
killPane,
} from "./ipc";
import Pane from "./lib/layout/Pane.svelte";
import Notifications from "./components/Notifications.svelte";
import Palette from "./components/Palette.svelte";
import {
provideOrchestration,
type TreeOps,
} from "./lib/layout/orchestration.svelte";
import {
type TreeNode,
type NodeId,
type Orientation,
type LeafNode,
newLeaf,
splitLeaf,
closeLeaf,
findLeaf,
leafCount,
walkLeaves,
changeDistro,
changeLabel,
toggleBroadcast as toggleBroadcastInTree,
serialize,
deserialize,
presetSingle,
presetTwoColumns,
presetThreeColumns,
presetTwoRows,
presetTwoByTwo,
} from "./lib/layout/tree";
const LEGACY_STORAGE_KEY = "tiletopia.tree.v1";
let defaultDistro = $state<string | undefined>(undefined);
let ready = $state(false);
let tree = $state<TreeNode>(newLeaf());
let paletteOpen = $state(false);
// activeLeafId lives here (not on the orch class) because Svelte 5 didn't
// reliably track class-field $state reads from child components that
// obtained the orch instance via getContext. Local $state drilled via
// prop works.
let activeLeafId = $state<NodeId | null>(null);
function setActive(id: NodeId) {
activeLeafId = id;
}
function clearActiveIf(id: NodeId) {
if (activeLeafId === id) activeLeafId = null;
}
// ---- tree mutation handlers (closures over tree $state) -----------------
function handleSplit(leafId: NodeId, orientation: Orientation) {
const parent = findLeaf(tree, leafId);
const inherit = parent
? { distro: parent.distro ?? defaultDistro, cwd: parent.cwd }
: { distro: defaultDistro };
tree = splitLeaf(tree, leafId, orientation, inherit);
}
// Bumped on close to force a clean Pane remount (the only way the closed
// pane's DOM actually disappears given the reactivity wall).
let renderKey = $state(0);
function handleClose(leafId: NodeId) {
// Kill the PTY directly so it dies even though Svelte may not unmount.
const paneId = orch.paneIdByLeaf.get(leafId);
if (paneId != null) {
void killPane(paneId).catch((e) => console.warn("killPane failed:", e));
orch.paneIdByLeaf.delete(leafId);
}
const next = closeLeaf(tree, leafId);
tree = next ?? newLeaf({ distro: defaultDistro });
clearActiveIf(leafId);
// Force a clean re-render of the whole pane tree. Yes this kills + respawns
// every other pane's PTY too — that's the cost of the reactivity wall.
// Without this, the closed pane stays visible AND zombie split elements
// intercept clicks meant for the remaining panes.
renderKey += 1;
}
function handleSetDistro(leafId: NodeId, distro: string) {
tree = changeDistro(tree, leafId, distro);
}
function handleSetLabel(leafId: NodeId, label: string | undefined) {
tree = changeLabel(tree, leafId, label);
}
function handleToggleBroadcast(leafId: NodeId) {
tree = toggleBroadcastInTree(tree, leafId);
}
function handleBroadcastFrom(originLeafId: NodeId, dataB64: string) {
let peers = 0;
for (const leaf of walkLeaves(tree)) {
if (leaf.id === originLeafId) continue;
if (!leaf.broadcast) continue;
const paneId = orch.paneIdByLeaf.get(leaf.id);
if (paneId == null) {
console.warn("[tiletopia] broadcast peer has no paneId yet:", leaf.id);
continue;
}
peers++;
writeToPane(paneId, dataB64).catch((e) =>
console.warn("[tiletopia] broadcast write failed:", e),
);
}
console.log("[tiletopia] broadcastFrom", originLeafId, "→", peers, "peer(s)");
}
const treeOps: TreeOps = {
split: handleSplit,
close: handleClose,
setDistro: handleSetDistro,
setLabel: handleSetLabel,
toggleBroadcast: handleToggleBroadcast,
broadcastFrom: handleBroadcastFrom,
};
// Provide the orchestration store. All Pane / SplitNode / LeafPane
// descendants consume it via `useOrchestration()` — no prop drilling.
const orch = provideOrchestration(treeOps);
orch.configureActiveHandlers(setActive, clearActiveIf);
function isInteractiveDistro(name: string): boolean {
return !name.toLowerCase().startsWith("docker-desktop");
}
onMount(async () => {
// 1. Try APPDATA persistence.
let loaded: TreeNode | null = null;
try {
const json = await loadWorkspace();
if (json) loaded = deserialize(json);
} catch (e) {
console.warn("loadWorkspace failed:", e);
}
// 2. Migrate from M2 localStorage if APPDATA is empty.
if (!loaded) {
try {
const legacy = localStorage.getItem(LEGACY_STORAGE_KEY);
if (legacy) {
loaded = deserialize(legacy);
if (loaded) void saveWorkspace(legacy);
localStorage.removeItem(LEGACY_STORAGE_KEY);
}
} catch (e) {
console.warn("legacy localStorage migration failed:", e);
}
}
if (loaded) tree = loaded;
// 3. Resolve default distro.
try {
const ds = await listDistros();
orch.distros = ds;
defaultDistro = ds.find(isInteractiveDistro) ?? ds[0];
} catch (e) {
console.warn("list_distros failed:", e);
}
if (defaultDistro) backfillDistro(tree, defaultDistro);
ready = true;
});
function backfillDistro(node: TreeNode, fallback: string) {
if (node.kind === "leaf") {
if (!node.distro) node.distro = fallback;
} else {
backfillDistro(node.a, fallback);
backfillDistro(node.b, fallback);
}
}
// ---- debounced auto-save -------------------------------------------------
let saveTimer: number | null = null;
const SAVE_DEBOUNCE_MS = 500;
$effect(() => {
if (!ready) return;
const json = serialize(tree);
if (saveTimer != null) clearTimeout(saveTimer);
saveTimer = window.setTimeout(() => {
saveTimer = null;
saveWorkspace(json).catch((e) =>
console.warn("saveWorkspace failed:", e),
);
}, SAVE_DEBOUNCE_MS);
});
// ---- Ctrl+K palette toggle ----------------------------------------------
// Capture phase so we win over xterm.js's keystroke capture inside terminals.
$effect(() => {
function onKey(e: KeyboardEvent) {
if ((e.ctrlKey || e.metaKey) && e.key.toLowerCase() === "k") {
console.log("[tiletopia] Ctrl+K caught, paletteOpen ->", !paletteOpen);
e.preventDefault();
e.stopPropagation();
paletteOpen = !paletteOpen;
}
}
window.addEventListener("keydown", onKey, true);
return () => window.removeEventListener("keydown", onKey, true);
});
// ---- Active-pane detector via active-element polling --------------------
// We tried letting Svelte handle class:active reactively in LeafPane, but
// through this app's component chain the prop changes don't trigger a
// template re-evaluation reliably (root cause unclear — likely a Svelte 5
// interaction with our recursive Pane / setInterval pattern). So we ALSO
// manipulate `.leaf.active` directly via DOM as a backstop.
// ---- Workarounds for Svelte 5 prop-reactivity wall in this app ----------
// Without these, NOTHING updates reactively: no active border, no broadcast
// color, no resize, no close. Verified empirically: stripping the
// workarounds breaks every interaction.
$effect(() => {
let lastLeafId: string | null = null;
const interval = window.setInterval(() => {
// Focus detection → setActive
const el = document.activeElement;
const leafEl = el?.closest("[data-leaf-id]");
const id = leafEl?.getAttribute("data-leaf-id") ?? null;
if (id && id !== lastLeafId) {
lastLeafId = id;
setActive(id);
}
// Active border DOM sync
document.querySelectorAll("[data-leaf-id].leaf").forEach((el) => {
const elId = el.getAttribute("data-leaf-id");
if (elId === activeLeafId) el.classList.add("active");
else el.classList.remove("active");
});
// Broadcast DOM sync
for (const leaf of walkLeaves(tree)) {
const el = document.querySelector(`[data-leaf-id="${leaf.id}"]`);
if (!el) continue;
el.classList.toggle("broadcasting", !!leaf.broadcast);
const chip = el.querySelector(".bcast-chip");
if (chip) chip.classList.toggle("on", !!leaf.broadcast);
}
}, 250);
return () => clearInterval(interval);
});
// ---- preset layouts ------------------------------------------------------
function applyPreset(make: (d: { distro?: string }) => TreeNode) {
const count = leafCount(tree);
if (count > 1 && !confirm(`Replace current layout (${count} panes)? This kills all open shells.`)) {
return;
}
tree = make({ distro: defaultDistro });
}
// ---- palette feed --------------------------------------------------------
const paletteLeaves = $derived.by<LeafNode[]>(() => {
if (!paletteOpen) return [];
return Array.from(walkLeaves(tree));
});
function onPalettePick(leafId: string) {
setActive(leafId);
paletteOpen = false;
}
</script>
<div class="app">
<header class="titlebar">
<span class="label">tiletopia</span>
<span class="distros">
{#if orch.distros.length === 0}
<span class="muted">no distros enumerated</span>
{:else}
<span class="muted">default:</span>
{#each orch.distros as d}
<button
class="distro-btn"
class:active={d === defaultDistro}
onclick={() => (defaultDistro = d)}
title="Set default distro for new panes"
>{d}</button>
{/each}
{/if}
</span>
<span class="presets">
<span class="muted">layout:</span>
<button class="preset-btn" title="Single pane" onclick={() => applyPreset(presetSingle)}>1</button>
<button class="preset-btn" title="Two columns" onclick={() => applyPreset(presetTwoColumns)}>2H</button>
<button class="preset-btn" title="Three columns" onclick={() => applyPreset(presetThreeColumns)}>3H</button>
<button class="preset-btn" title="Two rows" onclick={() => applyPreset(presetTwoRows)}>2V</button>
<button class="preset-btn" title="2 × 2 grid" onclick={() => applyPreset(presetTwoByTwo)}>2×2</button>
</span>
<button class="palette-btn" onclick={() => (paletteOpen = true)} title="Jump to pane (Ctrl+K)">
⌘K
</button>
<button class="palette-btn" onclick={() => orch.notify("test toast at " + new Date().toLocaleTimeString())} title="Fire a test toast">
🔔
</button>
<span class="layout-info">
{leafCount(tree)} pane{leafCount(tree) === 1 ? "" : "s"}
</span>
</header>
<div class="pane-wrap">
{#if ready}
{#key renderKey}
<Pane node={tree} {activeLeafId} />
{/key}
{/if}
</div>
<Notifications
notifications={orch.notifications}
onDismiss={(id) => orch.dismiss(id)}
/>
{#if paletteOpen}
<Palette
leaves={paletteLeaves}
onPick={onPalettePick}
onClose={() => (paletteOpen = false)}
/>
{/if}
</div>
<style>
.distros, .presets {
display: flex;
gap: 4px;
align-items: center;
}
.distro-btn, .preset-btn, .palette-btn {
font: inherit;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
font-size: 11px;
background: #222;
color: #aaa;
border: 1px solid #333;
border-radius: 3px;
padding: 2px 8px;
cursor: pointer;
}
.distro-btn:hover, .preset-btn:hover, .palette-btn:hover {
background: #2a2a2a;
color: #ddd;
}
.distro-btn.active {
background: #1a3a5c;
color: #cce6ff;
border-color: #2a5a8c;
}
.preset-btn {
min-width: 28px;
text-align: center;
}
.muted {
color: #666;
font-style: italic;
}
.layout-info {
margin-left: auto;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
color: #777;
font-size: 11px;
}
</style>

372
src/App.tsx Normal file
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@ -0,0 +1,372 @@
import { useCallback, useEffect, useMemo, useRef, useState } from "react";
import {
listDistros,
loadWorkspace,
saveWorkspace,
writeToPane,
killPane,
type PaneId,
} from "./ipc";
import {
type TreeNode,
type NodeId,
type Orientation,
type LeafNode,
newLeaf,
splitLeaf,
closeLeaf,
findLeaf,
leafCount,
walkLeaves,
changeDistro,
changeLabel,
toggleBroadcast as toggleBroadcastInTree,
serialize,
deserialize,
presetSingle,
presetTwoColumns,
presetThreeColumns,
presetTwoRows,
presetTwoByTwo,
} from "./lib/layout/tree";
import { OrchestrationProvider, type Orchestration } from "./lib/layout/orchestration";
import Pane from "./lib/layout/Pane";
import Notifications, { type Toast } from "./components/Notifications";
import Palette from "./components/Palette";
import "./App.css";
const LEGACY_STORAGE_KEY = "tiletopia.tree.v1";
const SAVE_DEBOUNCE_MS = 500;
function isInteractiveDistro(name: string): boolean {
return !name.toLowerCase().startsWith("docker-desktop");
}
export default function App() {
// ---- top-level state -----------------------------------------------------
const [tree, setTree] = useState<TreeNode>(() => newLeaf());
const [activeLeafId, setActiveLeafId] = useState<NodeId | null>(null);
const [distros, setDistros] = useState<string[]>([]);
const [defaultDistro, setDefaultDistro] = useState<string | undefined>(undefined);
const [ready, setReady] = useState(false);
const [notifications, setNotifications] = useState<Toast[]>([]);
const [paletteOpen, setPaletteOpen] = useState(false);
// ---- non-reactive lookups -----------------------------------------------
const paneIdByLeafRef = useRef<Map<NodeId, PaneId>>(new Map());
const nextNotifIdRef = useRef(1);
const treeRef = useRef(tree);
useEffect(() => {
treeRef.current = tree;
}, [tree]);
// ---- mount: load workspace + distros ------------------------------------
useEffect(() => {
let cancelled = false;
(async () => {
let loaded: TreeNode | null = null;
try {
const json = await loadWorkspace();
if (json) loaded = deserialize(json);
} catch (e) {
console.warn("loadWorkspace failed:", e);
}
if (!loaded) {
try {
const legacy = localStorage.getItem(LEGACY_STORAGE_KEY);
if (legacy) {
loaded = deserialize(legacy);
if (loaded) void saveWorkspace(legacy);
localStorage.removeItem(LEGACY_STORAGE_KEY);
}
} catch (e) {
console.warn("legacy localStorage migration failed:", e);
}
}
let resolvedDistros: string[] = [];
let resolvedDefault: string | undefined;
try {
resolvedDistros = await listDistros();
resolvedDefault =
resolvedDistros.find(isInteractiveDistro) ?? resolvedDistros[0];
} catch (e) {
console.warn("list_distros failed:", e);
}
if (cancelled) return;
if (loaded) {
if (resolvedDefault) backfillDistro(loaded, resolvedDefault);
setTree(loaded);
} else if (resolvedDefault) {
setTree(newLeaf({ distro: resolvedDefault }));
}
setDistros(resolvedDistros);
setDefaultDistro(resolvedDefault);
setReady(true);
})();
return () => {
cancelled = true;
};
}, []);
// ---- debounced save ------------------------------------------------------
useEffect(() => {
if (!ready) return;
const id = window.setTimeout(() => {
saveWorkspace(serialize(tree)).catch((e) =>
console.warn("saveWorkspace failed:", e),
);
}, SAVE_DEBOUNCE_MS);
return () => clearTimeout(id);
}, [tree, ready]);
// ---- Ctrl+K palette toggle (capture phase to beat xterm) ----------------
useEffect(() => {
function onKey(e: KeyboardEvent) {
if ((e.ctrlKey || e.metaKey) && e.key.toLowerCase() === "k") {
e.preventDefault();
e.stopPropagation();
setPaletteOpen((v) => !v);
}
}
window.addEventListener("keydown", onKey, true);
return () => window.removeEventListener("keydown", onKey, true);
}, []);
// ---- focus polling → setActive (xterm.js eats pointerdown) --------------
useEffect(() => {
let lastLeafId: string | null = null;
const interval = window.setInterval(() => {
const el = document.activeElement;
const leafEl = el?.closest("[data-leaf-id]");
const id = leafEl?.getAttribute("data-leaf-id") ?? null;
if (id && id !== lastLeafId) {
lastLeafId = id;
setActiveLeafId(id);
}
}, 250);
return () => clearInterval(interval);
}, []);
// ---- orchestration callbacks --------------------------------------------
const split = useCallback(
(leafId: NodeId, orientation: Orientation) => {
setTree((t) => {
const parent = findLeaf(t, leafId);
const inherit = parent
? { distro: parent.distro ?? defaultDistro, cwd: parent.cwd }
: { distro: defaultDistro };
return splitLeaf(t, leafId, orientation, inherit);
});
},
[defaultDistro],
);
const close = useCallback(
(leafId: NodeId) => {
const paneId = paneIdByLeafRef.current.get(leafId);
if (paneId != null) {
void killPane(paneId).catch((e) => console.warn("killPane failed:", e));
paneIdByLeafRef.current.delete(leafId);
}
setTree((t) => closeLeaf(t, leafId) ?? newLeaf({ distro: defaultDistro }));
setActiveLeafId((cur) => (cur === leafId ? null : cur));
},
[defaultDistro],
);
const setDistro = useCallback((leafId: NodeId, distro: string) => {
setTree((t) => changeDistro(t, leafId, distro));
}, []);
const setLabel = useCallback((leafId: NodeId, label: string | undefined) => {
setTree((t) => changeLabel(t, leafId, label));
}, []);
const toggleBroadcast = useCallback((leafId: NodeId) => {
setTree((t) => toggleBroadcastInTree(t, leafId));
}, []);
const setActive = useCallback((leafId: NodeId) => {
setActiveLeafId(leafId);
}, []);
const registerPaneId = useCallback(
(leafId: NodeId, paneId: PaneId | null) => {
if (paneId == null) paneIdByLeafRef.current.delete(leafId);
else paneIdByLeafRef.current.set(leafId, paneId);
},
[],
);
const broadcastFrom = useCallback(
(originLeafId: NodeId, dataB64: string) => {
let peers = 0;
for (const leaf of walkLeaves(treeRef.current)) {
if (leaf.id === originLeafId) continue;
if (!leaf.broadcast) continue;
const paneId = paneIdByLeafRef.current.get(leaf.id);
if (paneId == null) continue;
peers++;
writeToPane(paneId, dataB64).catch((e) =>
console.warn("broadcast write failed:", e),
);
}
if (peers > 0) {
console.log("[tiletopia] broadcastFrom", originLeafId, "→", peers, "peer(s)");
}
},
[],
);
const notify = useCallback((message: string) => {
const id = nextNotifIdRef.current++;
setNotifications((ns) => [...ns, { id, message }]);
window.setTimeout(() => {
setNotifications((ns) => ns.filter((n) => n.id !== id));
}, 5000);
}, []);
const dismissNotification = useCallback((id: number) => {
setNotifications((ns) => ns.filter((n) => n.id !== id));
}, []);
const orch = useMemo<Orchestration>(
() => ({
activeLeafId,
distros,
split,
close,
setDistro,
setLabel,
toggleBroadcast,
setActive,
registerPaneId,
broadcastFrom,
notify,
}),
[
activeLeafId,
distros,
split,
close,
setDistro,
setLabel,
toggleBroadcast,
setActive,
registerPaneId,
broadcastFrom,
notify,
],
);
const applyPreset = useCallback(
(make: (d: { distro?: string }) => TreeNode) => {
const count = leafCount(tree);
if (
count > 1 &&
!window.confirm(
`Replace current layout (${count} panes)? This kills all open shells.`,
)
) {
return;
}
setTree(make({ distro: defaultDistro }));
},
[tree, defaultDistro],
);
const paletteLeaves = useMemo<LeafNode[]>(
() => (paletteOpen ? Array.from(walkLeaves(tree)) : []),
[paletteOpen, tree],
);
const onPalettePick = useCallback((leafId: string) => {
setActiveLeafId(leafId);
setPaletteOpen(false);
}, []);
return (
<div className="app">
<header className="titlebar">
<span className="label">tiletopia</span>
<span className="distros">
{distros.length === 0 ? (
<span className="muted">no distros enumerated</span>
) : (
<>
<span className="muted">default:</span>
{distros.map((d) => (
<button
key={d}
className={`distro-btn${d === defaultDistro ? " active" : ""}`}
onClick={() => setDefaultDistro(d)}
title="Set default distro for new panes"
>
{d}
</button>
))}
</>
)}
</span>
<span className="presets">
<span className="muted">layout:</span>
<button className="preset-btn" title="Single pane" onClick={() => applyPreset(presetSingle)}>1</button>
<button className="preset-btn" title="Two columns" onClick={() => applyPreset(presetTwoColumns)}>2H</button>
<button className="preset-btn" title="Three columns" onClick={() => applyPreset(presetThreeColumns)}>3H</button>
<button className="preset-btn" title="Two rows" onClick={() => applyPreset(presetTwoRows)}>2V</button>
<button className="preset-btn" title="2 × 2 grid" onClick={() => applyPreset(presetTwoByTwo)}>2×2</button>
</span>
<button
className="palette-btn"
onClick={() => setPaletteOpen(true)}
title="Jump to pane (Ctrl+K)"
>
⌘K
</button>
<button
className="palette-btn"
onClick={() => notify("test toast at " + new Date().toLocaleTimeString())}
title="Fire a test toast"
>
🔔
</button>
<span className="layout-info">
{leafCount(tree)} pane{leafCount(tree) === 1 ? "" : "s"}
</span>
</header>
<div className="pane-wrap">
{ready && (
<OrchestrationProvider value={orch}>
<Pane node={tree} />
</OrchestrationProvider>
)}
</div>
<Notifications notifications={notifications} onDismiss={dismissNotification} />
{paletteOpen && (
<Palette
leaves={paletteLeaves}
onPick={onPalettePick}
onClose={() => setPaletteOpen(false)}
/>
)}
</div>
);
}
function backfillDistro(node: TreeNode, fallback: string) {
if (node.kind === "leaf") {
if (!node.distro) node.distro = fallback;
} else {
backfillDistro(node.a, fallback);
backfillDistro(node.b, fallback);
}
}

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.toast-stack {
position: fixed;
top: 36px;
right: 12px;
display: flex;
flex-direction: column;
gap: 6px;
z-index: 100;
pointer-events: none;
}
.toast {
pointer-events: auto;
display: flex;
align-items: center;
gap: 10px;
min-width: 220px;
max-width: 320px;
padding: 8px 10px 8px 14px;
background: #1f1f1f;
color: #ddd;
border: 1px solid #3a5a8c;
border-left-width: 3px;
border-radius: 4px;
font-size: 12px;
box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
animation: slide-in 180ms ease-out;
}
.toast-msg {
flex: 1 1 auto;
line-height: 1.3;
word-break: break-word;
}
.toast-x {
flex: 0 0 auto;
background: transparent;
border: none;
color: #777;
font-size: 16px;
line-height: 1;
padding: 2px 6px;
cursor: pointer;
border-radius: 3px;
}
.toast-x:hover {
background: #2a2a2a;
color: #ddd;
}
@keyframes slide-in {
from {
transform: translateX(20px);
opacity: 0;
}
to {
transform: translateX(0);
opacity: 1;
}
}

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<script lang="ts">
export interface Toast {
id: number;
message: string;
}
let {
notifications,
onDismiss,
}: {
notifications: Toast[];
onDismiss: (id: number) => void;
} = $props();
</script>
<div class="toast-stack">
{#each notifications as t (t.id)}
<div class="toast">
<span class="toast-msg">{t.message}</span>
<button
class="toast-x"
onclick={() => onDismiss(t.id)}
aria-label="Dismiss notification"
>×</button>
</div>
{/each}
</div>
<style>
.toast-stack {
position: fixed;
top: 36px;
right: 12px;
display: flex;
flex-direction: column;
gap: 6px;
z-index: 100;
pointer-events: none;
}
.toast {
pointer-events: auto;
display: flex;
align-items: center;
gap: 10px;
min-width: 220px;
max-width: 320px;
padding: 8px 10px 8px 14px;
background: #1f1f1f;
color: #ddd;
border: 1px solid #3a5a8c;
border-left-width: 3px;
border-radius: 4px;
font-size: 12px;
box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
animation: slide-in 180ms ease-out;
}
.toast-msg {
flex: 1 1 auto;
line-height: 1.3;
word-break: break-word;
}
.toast-x {
flex: 0 0 auto;
background: transparent;
border: none;
color: #777;
font-size: 16px;
line-height: 1;
padding: 2px 6px;
cursor: pointer;
border-radius: 3px;
}
.toast-x:hover {
background: #2a2a2a;
color: #ddd;
}
@keyframes slide-in {
from { transform: translateX(20px); opacity: 0; }
to { transform: translateX(0); opacity: 1; }
}
</style>

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import React from "react";
import "./Notifications.css";
export interface Toast {
id: number;
message: string;
}
interface NotificationsProps {
notifications: Toast[];
onDismiss: (id: number) => void;
}
export default function Notifications({
notifications,
onDismiss,
}: NotificationsProps) {
return (
<div className="toast-stack">
{notifications.map((t) => (
<div key={t.id} className="toast">
<span className="toast-msg">{t.message}</span>
<button
className="toast-x"
onClick={() => onDismiss(t.id)}
aria-label="Dismiss notification"
>
×
</button>
</div>
))}
</div>
);
}

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.backdrop {
position: fixed;
inset: 0;
background: rgba(0, 0, 0, 0.55);
backdrop-filter: blur(2px);
z-index: 99;
border: 0;
padding: 0;
cursor: default;
}
.palette {
position: fixed;
top: 12vh;
left: 50%;
transform: translateX(-50%);
width: min(520px, 90vw);
background: #181818;
border: 1px solid #2a2a2a;
border-radius: 6px;
box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
z-index: 100;
display: flex;
flex-direction: column;
overflow: hidden;
}
.palette-input {
font: inherit;
font-size: 14px;
color: #fff;
background: #1f1f1f;
border: none;
border-bottom: 1px solid #2a2a2a;
padding: 10px 14px;
outline: none;
}
.palette-list {
list-style: none;
margin: 0;
padding: 4px;
max-height: 50vh;
overflow-y: auto;
}
.palette-item {
width: 100%;
text-align: left;
background: transparent;
border: none;
color: #ccc;
padding: 6px 10px;
border-radius: 4px;
cursor: pointer;
display: flex;
align-items: baseline;
gap: 10px;
font: inherit;
font-size: 12px;
}
.palette-item.highlight {
background: #1a3a5c;
color: #cce6ff;
}
.name {
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
font-weight: 600;
}
.meta {
color: #888;
font-size: 11px;
}
.palette-item.highlight .meta {
color: #9bd;
}
.meta.cwd {
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
max-width: 200px;
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
}
.meta.bcast {
margin-left: auto;
}
.empty {
color: #777;
font-style: italic;
padding: 8px 10px;
list-style: none;
}

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<script lang="ts">
import type { LeafNode } from "../lib/layout/tree";
let {
leaves,
onPick,
onClose,
}: {
leaves: LeafNode[];
onPick: (leafId: string) => void;
onClose: () => void;
} = $props();
let query = $state("");
let inputEl: HTMLInputElement | null = $state(null);
let highlightIndex = $state(0);
$effect(() => {
queueMicrotask(() => inputEl?.focus());
});
const filtered = $derived.by(() => {
const q = query.trim().toLowerCase();
if (!q) return leaves;
return leaves.filter((l) => {
const blob = `${l.label ?? ""} ${l.distro ?? ""} ${l.cwd ?? ""}`.toLowerCase();
return blob.includes(q);
});
});
// Clamp highlight whenever the filtered list changes.
$effect(() => {
if (highlightIndex >= filtered.length) highlightIndex = Math.max(0, filtered.length - 1);
});
function pick(idx: number) {
const l = filtered[idx];
if (l) onPick(l.id);
}
function onKey(e: KeyboardEvent) {
if (e.key === "Escape") {
e.preventDefault();
onClose();
} else if (e.key === "ArrowDown") {
e.preventDefault();
if (filtered.length > 0) {
highlightIndex = (highlightIndex + 1) % filtered.length;
}
} else if (e.key === "ArrowUp") {
e.preventDefault();
if (filtered.length > 0) {
highlightIndex = (highlightIndex - 1 + filtered.length) % filtered.length;
}
} else if (e.key === "Enter") {
e.preventDefault();
pick(highlightIndex);
}
}
</script>
<button
class="backdrop"
onclick={onClose}
aria-label="Close palette"
></button>
<div class="palette" role="dialog" aria-label="Jump to pane">
<input
bind:this={inputEl}
bind:value={query}
onkeydown={onKey}
placeholder="Jump to pane — type to filter, ↑/↓ + Enter"
class="palette-input"
/>
<ul class="palette-list">
{#if filtered.length === 0}
<li class="empty">No matching panes.</li>
{:else}
{#each filtered as leaf, i}
<li>
<button
class="palette-item"
class:highlight={i === highlightIndex}
onclick={() => pick(i)}
onmouseenter={() => (highlightIndex = i)}
>
<span class="name">{leaf.label ?? "(unnamed)"}</span>
<span class="meta">{leaf.distro ?? "default"}</span>
{#if leaf.cwd}<span class="meta cwd">{leaf.cwd}</span>{/if}
{#if leaf.broadcast}<span class="meta bcast">📡</span>{/if}
</button>
</li>
{/each}
{/if}
</ul>
</div>
<style>
.backdrop {
position: fixed;
inset: 0;
background: rgba(0, 0, 0, 0.55);
backdrop-filter: blur(2px);
z-index: 99;
border: 0;
padding: 0;
cursor: default;
}
.palette {
position: fixed;
top: 12vh;
left: 50%;
transform: translateX(-50%);
width: min(520px, 90vw);
background: #181818;
border: 1px solid #2a2a2a;
border-radius: 6px;
box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
z-index: 100;
display: flex;
flex-direction: column;
overflow: hidden;
}
.palette-input {
font: inherit;
font-size: 14px;
color: #fff;
background: #1f1f1f;
border: none;
border-bottom: 1px solid #2a2a2a;
padding: 10px 14px;
outline: none;
}
.palette-list {
list-style: none;
margin: 0;
padding: 4px;
max-height: 50vh;
overflow-y: auto;
}
.palette-item {
width: 100%;
text-align: left;
background: transparent;
border: none;
color: #ccc;
padding: 6px 10px;
border-radius: 4px;
cursor: pointer;
display: flex;
align-items: baseline;
gap: 10px;
font: inherit;
font-size: 12px;
}
.palette-item.highlight {
background: #1a3a5c;
color: #cce6ff;
}
.name {
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
font-weight: 600;
}
.meta {
color: #888;
font-size: 11px;
}
.palette-item.highlight .meta {
color: #9bd;
}
.meta.cwd {
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
max-width: 200px;
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
}
.meta.bcast {
margin-left: auto;
}
.empty {
color: #777;
font-style: italic;
padding: 8px 10px;
list-style: none;
}
</style>

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import React, { useState, useEffect, useRef, useMemo } from "react";
import type { LeafNode } from "../lib/layout/tree";
import "./Palette.css";
interface PaletteProps {
leaves: LeafNode[];
onPick: (leafId: string) => void;
onClose: () => void;
}
export default function Palette({ leaves, onPick, onClose }: PaletteProps) {
const [query, setQuery] = useState("");
const [highlightIndex, setHighlightIndex] = useState(0);
const inputRef = useRef<HTMLInputElement>(null);
// Autofocus the input on mount
useEffect(() => {
queueMicrotask(() => inputRef.current?.focus());
}, []);
// Compute filtered leaves based on query
const filtered = useMemo(() => {
const q = query.trim().toLowerCase();
if (!q) return leaves;
return leaves.filter((l) => {
const blob = `${l.label ?? ""} ${l.distro ?? ""} ${l.cwd ?? ""}`.toLowerCase();
return blob.includes(q);
});
}, [query, leaves]);
// Clamp highlight index when filtered list changes
useEffect(() => {
if (highlightIndex >= filtered.length) {
setHighlightIndex(Math.max(0, filtered.length - 1));
}
}, [filtered, highlightIndex]);
function pick(idx: number) {
const l = filtered[idx];
if (l) onPick(l.id);
}
function handleKeyDown(e: React.KeyboardEvent<HTMLInputElement>) {
if (e.key === "Escape") {
e.preventDefault();
onClose();
} else if (e.key === "ArrowDown") {
e.preventDefault();
if (filtered.length > 0) {
setHighlightIndex((prev) => (prev + 1) % filtered.length);
}
} else if (e.key === "ArrowUp") {
e.preventDefault();
if (filtered.length > 0) {
setHighlightIndex((prev) =>
(prev - 1 + filtered.length) % filtered.length
);
}
} else if (e.key === "Enter") {
e.preventDefault();
pick(highlightIndex);
}
}
return (
<>
<button
className="backdrop"
onClick={onClose}
aria-label="Close palette"
></button>
<div className="palette" role="dialog" aria-label="Jump to pane">
<input
ref={inputRef}
type="text"
className="palette-input"
placeholder="Jump to pane — type to filter, ↑/↓ + Enter"
value={query}
onChange={(e) => setQuery(e.target.value)}
onKeyDown={handleKeyDown}
/>
<ul className="palette-list">
{filtered.length === 0 ? (
<li className="empty">No matching panes.</li>
) : (
filtered.map((leaf, i) => (
<li key={leaf.id}>
<button
className={`palette-item ${
i === highlightIndex ? "highlight" : ""
}`}
onClick={() => pick(i)}
onMouseEnter={() => setHighlightIndex(i)}
>
<span className="name">{leaf.label ?? "(unnamed)"}</span>
<span className="meta">{leaf.distro ?? "default"}</span>
{leaf.cwd && <span className="meta cwd">{leaf.cwd}</span>}
{leaf.broadcast && <span className="meta bcast">📡</span>}
</button>
</li>
))
)}
</ul>
</div>
</>
);
}

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<script lang="ts">
import { onMount, onDestroy } from "svelte";
import { Terminal } from "@xterm/xterm";
import { FitAddon } from "@xterm/addon-fit";
import type { UnlistenFn } from "@tauri-apps/api/event";
import {
spawnPane,
writeToPane,
resizePane,
killPane,
onPaneData,
onPaneExit,
type PaneId,
} from "../ipc";
let {
distro = undefined,
cwd = undefined,
onStatus = (_s: string, _ok: boolean) => {},
onSpawn = undefined,
onInput = undefined,
onDataReceived = undefined,
onFocus = undefined,
focusTrigger = 0,
}: {
distro?: string;
cwd?: string;
onStatus?: (msg: string, ok: boolean) => void;
/** Fired once when the backend PTY is alive and we have its PaneId. */
onSpawn?: (paneId: PaneId) => void;
/** Fired AFTER each writeToPane on user keypress. Used by broadcasting. */
onInput?: (dataB64: string) => void;
/** Fired whenever output arrives from the PTY. Used for idle detection. */
onDataReceived?: () => void;
/** Fired when xterm's textarea gains focus (i.e., user clicked here). */
onFocus?: () => void;
/** Increment to refocus the terminal programmatically (palette etc.). */
focusTrigger?: number;
} = $props();
let containerEl: HTMLDivElement;
let term: Terminal | null = null;
let fit: FitAddon | null = null;
let paneId: PaneId | null = null;
let unlistenData: UnlistenFn | null = null;
let unlistenExit: UnlistenFn | null = null;
let ro: ResizeObserver | null = null;
// Decode base64 -> Uint8Array. xterm.js accepts both strings and Uint8Array;
// bytes is preferred to avoid double-decoding UTF-8.
function b64ToBytes(b64: string): Uint8Array {
const bin = atob(b64);
const out = new Uint8Array(bin.length);
for (let i = 0; i < bin.length; i++) out[i] = bin.charCodeAt(i);
return out;
}
function bytesToB64(bytes: Uint8Array): string {
let s = "";
for (let i = 0; i < bytes.length; i++) s += String.fromCharCode(bytes[i]);
return btoa(s);
}
function stringToB64(s: string): string {
// xterm.js's onData emits a JS string; need to UTF-8 encode before base64.
return bytesToB64(new TextEncoder().encode(s));
}
onMount(async () => {
term = new Terminal({
fontFamily: '"Cascadia Mono", "JetBrains Mono", "Consolas", monospace',
fontSize: 13,
cursorBlink: true,
theme: {
background: "#0c0c0c",
foreground: "#e6e6e6",
},
scrollback: 5000,
convertEol: false,
allowProposedApi: true,
});
fit = new FitAddon();
term.loadAddon(fit);
term.open(containerEl);
// Initial size — fit before we ask the PTY for its dimensions.
fit.fit();
const cols = term.cols;
const rows = term.rows;
try {
paneId = await spawnPane({ distro, cwd, cols, rows });
onStatus(`pane ${paneId} alive`, true);
onSpawn?.(paneId);
} catch (e) {
const msg = `spawn_pane failed: ${e}`;
term.write(`\r\n\x1b[31m${msg}\x1b[0m\r\n`);
onStatus(msg, false);
return;
}
unlistenData = await onPaneData(paneId, (b64) => {
term?.write(b64ToBytes(b64));
onDataReceived?.();
});
unlistenExit = await onPaneExit(paneId, () => {
term?.write("\r\n\x1b[33m[pane exited]\x1b[0m\r\n");
onStatus(`pane ${paneId} exited`, false);
});
term.onData((data) => {
if (paneId == null) return;
const b64 = stringToB64(data);
void writeToPane(paneId, b64);
onInput?.(b64);
});
// xterm.js's own focus event — fires when the hidden textarea gets focus
// (i.e., user clicked anywhere in the terminal). Most reliable signal
// for "user wants this pane active" — no DOM event traversal involved.
term.onSelectionChange(() => {}); // ensure the addon system is initialized; noop
if (typeof (term as unknown as { onFocus?: unknown }).onFocus === "function") {
(term as unknown as { onFocus: (cb: () => void) => void }).onFocus(() => {
onFocus?.();
});
} else {
// Fallback: listen on the textarea element directly.
const ta = containerEl.querySelector(".xterm-helper-textarea");
if (ta) ta.addEventListener("focus", () => onFocus?.(), true);
}
// Re-fit on container resize; forward new size to the PTY.
ro = new ResizeObserver(() => {
try {
fit?.fit();
if (paneId != null && term) {
void resizePane(paneId, term.cols, term.rows);
}
} catch (e) {
console.warn("resize failed", e);
}
});
ro.observe(containerEl);
// Focus so typing immediately lands in the terminal.
term.focus();
});
onDestroy(() => {
ro?.disconnect();
unlistenData?.();
unlistenExit?.();
if (paneId != null) {
void killPane(paneId);
}
term?.dispose();
});
// Refocus the terminal whenever the parent bumps focusTrigger.
$effect(() => {
// Reactive read on focusTrigger so this effect re-runs when it changes.
focusTrigger;
if (term && focusTrigger > 0) term.focus();
});
</script>
<div class="xterm-host" bind:this={containerEl}></div>
<style>
.xterm-host {
width: 100%;
height: 100%;
}
/* xterm.js sets inline padding=0 on its container; ensure the viewport
fills the host with no scrollbar gap. */
:global(.xterm) {
height: 100%;
}
:global(.xterm-viewport) {
background: #0c0c0c !important;
}
</style>

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import { useRef, useEffect } from "react";
import { Terminal } from "@xterm/xterm";
import { FitAddon } from "@xterm/addon-fit";
import type { UnlistenFn } from "@tauri-apps/api/event";
import {
spawnPane,
writeToPane,
resizePane,
killPane,
onPaneData,
onPaneExit,
type PaneId,
} from "../ipc";
// ---------------------------------------------------------------------------
// base64 helpers (private to this module)
// ---------------------------------------------------------------------------
function b64ToBytes(b64: string): Uint8Array {
const bin = atob(b64);
const out = new Uint8Array(bin.length);
for (let i = 0; i < bin.length; i++) out[i] = bin.charCodeAt(i);
return out;
}
function bytesToB64(bytes: Uint8Array): string {
let s = "";
for (let i = 0; i < bytes.length; i++) s += String.fromCharCode(bytes[i]);
return btoa(s);
}
function stringToB64(s: string): string {
// xterm.js's onData emits a JS string; UTF-8 encode before base64.
return bytesToB64(new TextEncoder().encode(s));
}
// ---------------------------------------------------------------------------
// Props
// ---------------------------------------------------------------------------
interface XtermPaneProps {
distro?: string;
cwd?: string;
onStatus?: (msg: string, ok: boolean) => void;
/** Fired once when the backend PTY is alive and we have its PaneId. */
onSpawn?: (paneId: PaneId) => void;
/** Fired AFTER each writeToPane on user keypress. Used by broadcasting. */
onInput?: (dataB64: string) => void;
/** Fired whenever output arrives from the PTY. Used for idle detection. */
onDataReceived?: () => void;
/** Fired when xterm's textarea gains focus (i.e., user clicked here). */
onFocus?: () => void;
/** Increment to refocus the terminal programmatically (palette etc.). */
focusTrigger?: number;
}
// ---------------------------------------------------------------------------
// Component
// ---------------------------------------------------------------------------
export default function XtermPane({
distro,
cwd,
onStatus,
onSpawn,
onInput,
onDataReceived,
onFocus,
focusTrigger = 0,
}: XtermPaneProps) {
const containerRef = useRef<HTMLDivElement>(null);
// Stable refs for callbacks so the mount effect doesn't need to re-run when
// parents pass new inline functions, while still always calling the latest version.
const onStatusRef = useRef(onStatus);
const onSpawnRef = useRef(onSpawn);
const onInputRef = useRef(onInput);
const onDataReceivedRef = useRef(onDataReceived);
const onFocusRef = useRef(onFocus);
useEffect(() => { onStatusRef.current = onStatus; }, [onStatus]);
useEffect(() => { onSpawnRef.current = onSpawn; }, [onSpawn]);
useEffect(() => { onInputRef.current = onInput; }, [onInput]);
useEffect(() => { onDataReceivedRef.current = onDataReceived; }, [onDataReceived]);
useEffect(() => { onFocusRef.current = onFocus; }, [onFocus]);
// -------------------------------------------------------------------------
// Mount / unmount: create terminal, spawn PTY, wire listeners
// -------------------------------------------------------------------------
useEffect(() => {
const container = containerRef.current;
if (!container) return;
let term: Terminal | null = new Terminal({
fontFamily: '"Cascadia Mono", "JetBrains Mono", "Consolas", monospace',
fontSize: 13,
cursorBlink: true,
theme: {
background: "#0c0c0c",
foreground: "#e6e6e6",
},
scrollback: 5000,
convertEol: false,
allowProposedApi: true,
});
const fit = new FitAddon();
term.loadAddon(fit);
term.open(container);
// Initial size — fit before asking the PTY for its dimensions.
fit.fit();
let paneId: PaneId | null = null;
let unlistenData: UnlistenFn | null = null;
let unlistenExit: UnlistenFn | null = null;
let ro: ResizeObserver | null = null;
let destroyed = false;
(async () => {
const cols = term!.cols;
const rows = term!.rows;
try {
paneId = await spawnPane({ distro, cwd, cols, rows });
if (destroyed) {
void killPane(paneId);
return;
}
onStatusRef.current?.(`pane ${paneId} alive`, true);
onSpawnRef.current?.(paneId);
} catch (e) {
if (destroyed) return;
const msg = `spawn_pane failed: ${e}`;
term?.write(`\r\n\x1b[31m${msg}\x1b[0m\r\n`);
onStatusRef.current?.(msg, false);
return;
}
unlistenData = await onPaneData(paneId, (b64) => {
term?.write(b64ToBytes(b64));
onDataReceivedRef.current?.();
});
unlistenExit = await onPaneExit(paneId, () => {
term?.write("\r\n\x1b[33m[pane exited]\x1b[0m\r\n");
onStatusRef.current?.(`pane ${paneId} exited`, false);
});
term?.onData((data) => {
if (paneId == null) return;
const b64 = stringToB64(data);
void writeToPane(paneId, b64);
onInputRef.current?.(b64);
});
// Focus detection: xterm.js doesn't expose onFocus as a first-class event
// in all versions, so try the proposed API first then fall back to the DOM.
term?.onSelectionChange(() => {}); // ensure addon system is initialised; noop
const termAny = term as unknown as { onFocus?: (cb: () => void) => void };
if (typeof termAny.onFocus === "function") {
termAny.onFocus(() => onFocusRef.current?.());
} else {
const ta = container.querySelector(".xterm-helper-textarea");
if (ta) ta.addEventListener("focus", () => onFocusRef.current?.(), true);
}
// Re-fit on container resize; forward new size to the PTY.
ro = new ResizeObserver(() => {
try {
fit.fit();
if (paneId != null && term) {
void resizePane(paneId, term.cols, term.rows);
}
} catch (e) {
console.warn("resize failed", e);
}
});
ro.observe(container);
// Focus so typing immediately lands in the terminal.
term?.focus();
})();
return () => {
destroyed = true;
ro?.disconnect();
unlistenData?.();
unlistenExit?.();
if (paneId != null) void killPane(paneId);
term?.dispose();
term = null;
};
// distro/cwd are only used at spawn time; intentionally omitted from deps
// so remounting doesn't happen if a parent re-renders with the same values.
// eslint-disable-next-line react-hooks/exhaustive-deps
}, []);
// -------------------------------------------------------------------------
// focusTrigger: programmatic refocus from parent (palette navigation etc.)
// -------------------------------------------------------------------------
const termRef = useRef<Terminal | null>(null);
// Keep termRef in sync via a second effect that runs after mount.
// We can't easily share the Terminal instance across the two effects without
// a ref, so we store it on termRef inside the mount effect instead.
// Actually, let's just wire focusTrigger by querying the textarea directly —
// that avoids the cross-effect coupling problem entirely.
useEffect(() => {
if (focusTrigger > 0 && containerRef.current) {
const ta = containerRef.current.querySelector<HTMLTextAreaElement>(
".xterm-helper-textarea",
);
ta?.focus();
}
}, [focusTrigger]);
// Suppress unused ref warning
void termRef;
return <div ref={containerRef} style={{ width: "100%", height: "100%" }} />;
}

170
src/lib/layout/LeafPane.css Normal file
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.leaf {
display: flex;
flex-direction: column;
width: 100%;
height: 100%;
min-width: 0;
min-height: 0;
border: 2px solid transparent;
box-sizing: border-box;
}
.leaf.active {
border-color: #5a8cd8;
}
.leaf.broadcasting {
border-color: #e09838;
}
.leaf.active.broadcasting {
border-color: #ffb840;
}
.pane-toolbar {
flex: 0 0 auto;
display: flex;
align-items: center;
gap: 8px;
padding: 2px 8px;
background: #181818;
border-bottom: 1px solid #2a2a2a;
font-size: 11px;
color: #aaa;
user-select: none;
min-height: 24px;
}
.pane-label {
font: inherit;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
font-weight: 600;
color: #ccc;
background: transparent;
border: 1px solid transparent;
border-radius: 3px;
padding: 1px 6px;
cursor: text;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
max-width: 200px;
}
.pane-label:hover {
background: #222;
border-color: #2a2a2a;
}
.label-input {
font: inherit;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
font-weight: 600;
color: #fff;
background: #0c0c0c;
border: 1px solid #3a5a8c;
border-radius: 3px;
padding: 1px 6px;
outline: none;
max-width: 240px;
}
.distro-wrap {
position: relative;
}
.distro-chip,
.bcast-chip {
font: inherit;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
font-size: 10px;
background: #222;
color: #88c;
border: 1px solid #2a2a3a;
border-radius: 3px;
padding: 1px 6px;
cursor: pointer;
}
.distro-chip:hover,
.bcast-chip:hover {
background: #2a2a3a;
color: #aac;
}
.bcast-chip {
color: #777;
background: #1c1c1c;
border-color: #2a2a2a;
padding: 1px 5px;
}
.bcast-chip.on {
background: #4a3010;
color: #f0c060;
border-color: #c98a1f;
}
.distro-menu {
position: absolute;
top: 100%;
left: 0;
margin-top: 2px;
background: #1a1a1a;
border: 1px solid #2a2a2a;
border-radius: 4px;
box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
z-index: 10;
min-width: 140px;
display: flex;
flex-direction: column;
padding: 2px;
}
.distro-menu-item {
font: inherit;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
font-size: 11px;
text-align: left;
background: transparent;
color: #ccc;
border: none;
border-radius: 2px;
padding: 3px 8px;
cursor: pointer;
}
.distro-menu-item:hover {
background: #2a2a2a;
}
.distro-menu-item.active {
background: #1a3a5c;
color: #cce6ff;
}
.pane-status {
margin-left: auto;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
color: #777;
font-size: 10px;
white-space: nowrap;
}
.pane-status.ok { color: #6c6; }
.pane-status.err { color: #d66; }
.pane-actions {
display: flex;
gap: 2px;
}
.pane-btn {
background: transparent;
border: none;
color: #888;
font: inherit;
font-size: 14px;
line-height: 1;
padding: 2px 6px;
border-radius: 3px;
cursor: pointer;
}
.pane-btn:hover {
background: #2a2a2a;
color: #ddd;
}
.pane-btn.close:hover {
background: #5a1a1a;
color: #fcc;
}
.xterm-wrap {
flex: 1 1 auto;
min-height: 0;
position: relative;
}

400
src/lib/layout/LeafPane.svelte
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@ -1,400 +0,0 @@
<script lang="ts">
import { onDestroy } from "svelte";
import type { LeafNode } from "./tree";
import { useOrchestration } from "./orchestration.svelte";
import XtermPane from "../../components/XtermPane.svelte";
let {
leaf,
activeLeafId,
}: {
leaf: LeafNode;
activeLeafId: string | null;
} = $props();
const orch = useOrchestration();
let status = $state("starting…");
let statusOk = $state(true);
// ---- label editing -------------------------------------------------------
let editingLabel = $state(false);
let labelDraft = $state("");
let labelInputEl: HTMLInputElement | null = $state(null);
function startEditLabel(e: MouseEvent) {
e.stopPropagation();
labelDraft = leaf.label ?? "";
editingLabel = true;
queueMicrotask(() => labelInputEl?.select());
}
function commitLabel() {
if (!editingLabel) return;
orch.setLabel(leaf.id, labelDraft);
editingLabel = false;
}
function cancelLabel() {
editingLabel = false;
}
function onLabelKey(e: KeyboardEvent) {
if (e.key === "Enter") {
e.preventDefault();
commitLabel();
} else if (e.key === "Escape") {
e.preventDefault();
cancelLabel();
}
}
// ---- distro popover ------------------------------------------------------
let distroOpen = $state(false);
function toggleDistroMenu(e: MouseEvent) {
e.stopPropagation();
distroOpen = !distroOpen;
}
function pickDistro(d: string) {
distroOpen = false;
if (d !== leaf.distro) orch.setDistro(leaf.id, d);
}
$effect(() => {
if (!distroOpen) return;
const onDocClick = () => (distroOpen = false);
window.addEventListener("click", onDocClick);
return () => window.removeEventListener("click", onDocClick);
});
// ---- idle detection ------------------------------------------------------
const IDLE_THRESHOLD_MS = 5000;
let lastDataTime = Date.now();
let notifiedThisIdle = false;
function onDataReceived() {
lastDataTime = Date.now();
notifiedThisIdle = false;
}
function checkIdle() {
if (notifiedThisIdle) return;
const sinceLast = Date.now() - lastDataTime;
if (sinceLast >= IDLE_THRESHOLD_MS) {
notifiedThisIdle = true;
const name = leaf.label ?? leaf.distro ?? "pane";
console.log("[tiletopia] notifying idle:", leaf.id, "quietForMs:", sinceLast);
orch.notify(`${name} is idle`);
}
}
const idleTimer = window.setInterval(checkIdle, 1000);
onDestroy(() => clearInterval(idleTimer));
// ---- broadcast -----------------------------------------------------------
function onTerminalInput(b64: string) {
if (leaf.broadcast) orch.broadcastFrom(leaf.id, b64);
}
// ---- focus / active ------------------------------------------------------
let focusTrigger = $state(0);
$effect(() => {
if (activeLeafId === leaf.id) focusTrigger += 1;
});
// Backup setActive for toolbar clicks (which can't reach the document
// capture listener if a bubble-phase handler stops propagation). Cheap;
// idempotent if the document listener also fired.
function onPaneClick() {
orch.setActive(leaf.id);
}
// ---- pane id registration ------------------------------------------------
function onPaneSpawned(paneId: number) {
orch.registerPaneId(leaf.id, paneId);
}
onDestroy(() => orch.registerPaneId(leaf.id, null));
</script>
<div
class="leaf"
class:active={activeLeafId === leaf.id}
data-debug-active={activeLeafId === leaf.id ? "yes" : "no"}
data-debug-prop={(activeLeafId ?? "null").slice(0, 8)}
class:broadcasting={leaf.broadcast}
role="group"
aria-label={"Terminal pane: " + (leaf.label ?? leaf.distro ?? "unnamed")}
data-leaf-id={leaf.id}
onpointerdown={onPaneClick}
>
<div class="pane-toolbar">
{#if editingLabel}
<input
class="label-input"
bind:this={labelInputEl}
bind:value={labelDraft}
onkeydown={onLabelKey}
onblur={commitLabel}
placeholder="(label)"
/>
{:else}
<button
class="pane-label"
onclick={startEditLabel}
title="Click to rename pane"
>
{leaf.label ?? "(unnamed)"}
</button>
{/if}
<span class="distro-wrap">
<button
class="distro-chip"
onclick={toggleDistroMenu}
title="Change distro (respawns the pane)"
>
{leaf.distro ?? "(default)"} ▾
</button>
{#if distroOpen}
<div
class="distro-menu"
onclick={(e) => e.stopPropagation()}
role="menu"
tabindex="-1"
onkeydown={() => {}}
>
{#each orch.distros as d}
<button
class="distro-menu-item"
class:active={d === leaf.distro}
onclick={() => pickDistro(d)}
>{d}</button>
{/each}
</div>
{/if}
</span>
<button
class="bcast-chip"
class:on={leaf.broadcast}
onclick={(e) => { e.stopPropagation(); orch.toggleBroadcast(leaf.id); }}
title={leaf.broadcast ? "Broadcasting (click to leave group)" : "Click to broadcast input to other broadcast panes"}
aria-pressed={leaf.broadcast ? "true" : "false"}
>📡</button>
<span class="pane-status {statusOk ? 'ok' : 'err'}">{status}</span>
<span class="pane-actions">
<button
class="pane-btn"
title="Split right"
onclick={(e) => { e.stopPropagation(); orch.split(leaf.id, "h"); }}
aria-label="Split right"
>⇥</button>
<button
class="pane-btn"
title="Split down"
onclick={(e) => { e.stopPropagation(); orch.split(leaf.id, "v"); }}
aria-label="Split down"
>⇣</button>
<button
class="pane-btn close"
title="Close pane"
onclick={(e) => { e.stopPropagation(); orch.close(leaf.id); }}
aria-label="Close pane"
>×</button>
</span>
</div>
<div class="xterm-wrap">
<XtermPane
distro={leaf.distro}
cwd={leaf.cwd}
onStatus={(msg, ok) => {
status = msg;
statusOk = ok;
}}
onSpawn={onPaneSpawned}
onInput={onTerminalInput}
onFocus={() => orch.setActive(leaf.id)}
{onDataReceived}
{focusTrigger}
/>
</div>
</div>
<style>
.leaf {
display: flex;
flex-direction: column;
width: 100%;
height: 100%;
min-width: 0;
min-height: 0;
border: 2px solid transparent;
box-sizing: border-box;
}
.leaf.active {
border-color: #5a8cd8;
}
.leaf.broadcasting {
border-color: #e09838;
}
.leaf.active.broadcasting {
border-color: #ffb840;
}
.pane-toolbar {
flex: 0 0 auto;
display: flex;
align-items: center;
gap: 8px;
padding: 2px 8px;
background: #181818;
border-bottom: 1px solid #2a2a2a;
font-size: 11px;
color: #aaa;
user-select: none;
min-height: 24px;
}
.pane-label {
font: inherit;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
font-weight: 600;
color: #ccc;
background: transparent;
border: 1px solid transparent;
border-radius: 3px;
padding: 1px 6px;
cursor: text;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
max-width: 200px;
}
.pane-label:hover {
background: #222;
border-color: #2a2a2a;
}
.label-input {
font: inherit;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
font-weight: 600;
color: #fff;
background: #0c0c0c;
border: 1px solid #3a5a8c;
border-radius: 3px;
padding: 1px 6px;
outline: none;
max-width: 240px;
}
.distro-wrap {
position: relative;
}
.distro-chip,
.bcast-chip {
font: inherit;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
font-size: 10px;
background: #222;
color: #88c;
border: 1px solid #2a2a3a;
border-radius: 3px;
padding: 1px 6px;
cursor: pointer;
}
.distro-chip:hover,
.bcast-chip:hover {
background: #2a2a3a;
color: #aac;
}
.bcast-chip {
color: #777;
background: #1c1c1c;
border-color: #2a2a2a;
padding: 1px 5px;
}
.bcast-chip.on {
background: #4a3010;
color: #f0c060;
border-color: #c98a1f;
}
.distro-menu {
position: absolute;
top: 100%;
left: 0;
margin-top: 2px;
background: #1a1a1a;
border: 1px solid #2a2a2a;
border-radius: 4px;
box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
z-index: 10;
min-width: 140px;
display: flex;
flex-direction: column;
padding: 2px;
}
.distro-menu-item {
font: inherit;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
font-size: 11px;
text-align: left;
background: transparent;
color: #ccc;
border: none;
border-radius: 2px;
padding: 3px 8px;
cursor: pointer;
}
.distro-menu-item:hover {
background: #2a2a2a;
}
.distro-menu-item.active {
background: #1a3a5c;
color: #cce6ff;
}
.pane-status {
margin-left: auto;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
color: #777;
font-size: 10px;
white-space: nowrap;
}
.pane-status.ok { color: #6c6; }
.pane-status.err { color: #d66; }
.pane-actions {
display: flex;
gap: 2px;
}
.pane-btn {
background: transparent;
border: none;
color: #888;
font: inherit;
font-size: 14px;
line-height: 1;
padding: 2px 6px;
border-radius: 3px;
cursor: pointer;
}
.pane-btn:hover {
background: #2a2a2a;
color: #ddd;
}
.pane-btn.close:hover {
background: #5a1a1a;
color: #fcc;
}
.xterm-wrap {
flex: 1 1 auto;
min-height: 0;
position: relative;
}
</style>

263
src/lib/layout/LeafPane.tsx Normal file
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@ -0,0 +1,263 @@
import {
useState,
useEffect,
useRef,
useCallback,
type KeyboardEvent,
type MouseEvent,
} from "react";
import type { LeafNode } from "./tree";
import { useOrchestration } from "./orchestration";
import XtermPane from "../../components/XtermPane";
import "./LeafPane.css";
const IDLE_THRESHOLD_MS = 5000;
export default function LeafPane({ leaf }: { leaf: LeafNode }) {
const orch = useOrchestration();
const isActive = orch.activeLeafId === leaf.id;
const isBroadcasting = !!leaf.broadcast;
// ---- status (from XtermPane) -------------------------------------------
const [status, setStatus] = useState("starting…");
const [statusOk, setStatusOk] = useState(true);
// ---- label editing -----------------------------------------------------
const [editingLabel, setEditingLabel] = useState(false);
const [labelDraft, setLabelDraft] = useState("");
const labelInputRef = useRef<HTMLInputElement | null>(null);
const startEditLabel = useCallback(
(e: MouseEvent) => {
e.stopPropagation();
setLabelDraft(leaf.label ?? "");
setEditingLabel(true);
// Focus on next tick so input is mounted
queueMicrotask(() => labelInputRef.current?.select());
},
[leaf.label],
);
const commitLabel = useCallback(() => {
if (!editingLabel) return;
orch.setLabel(leaf.id, labelDraft);
setEditingLabel(false);
}, [editingLabel, orch, leaf.id, labelDraft]);
const cancelLabel = useCallback(() => setEditingLabel(false), []);
const onLabelKey = useCallback(
(e: KeyboardEvent<HTMLInputElement>) => {
if (e.key === "Enter") {
e.preventDefault();
commitLabel();
} else if (e.key === "Escape") {
e.preventDefault();
cancelLabel();
}
},
[commitLabel, cancelLabel],
);
// ---- distro popover ----------------------------------------------------
const [distroOpen, setDistroOpen] = useState(false);
const toggleDistroMenu = useCallback((e: MouseEvent) => {
e.stopPropagation();
setDistroOpen((v) => !v);
}, []);
const pickDistro = useCallback(
(d: string) => {
setDistroOpen(false);
if (d !== leaf.distro) orch.setDistro(leaf.id, d);
},
[orch, leaf.id, leaf.distro],
);
// Dismiss popover on outside click
useEffect(() => {
if (!distroOpen) return;
const onDocClick = () => setDistroOpen(false);
window.addEventListener("click", onDocClick);
return () => window.removeEventListener("click", onDocClick);
}, [distroOpen]);
// ---- idle detection ----------------------------------------------------
const lastDataTimeRef = useRef(Date.now());
const notifiedThisIdleRef = useRef(false);
const onDataReceived = useCallback(() => {
lastDataTimeRef.current = Date.now();
notifiedThisIdleRef.current = false;
}, []);
useEffect(() => {
const id = window.setInterval(() => {
if (notifiedThisIdleRef.current) return;
const dt = Date.now() - lastDataTimeRef.current;
if (dt >= IDLE_THRESHOLD_MS) {
notifiedThisIdleRef.current = true;
const name = leaf.label ?? leaf.distro ?? "pane";
orch.notify(`${name} is idle`);
}
}, 1000);
return () => clearInterval(id);
}, [leaf.label, leaf.distro, orch]);
// ---- broadcast ---------------------------------------------------------
const onTerminalInput = useCallback(
(b64: string) => {
if (isBroadcasting) orch.broadcastFrom(leaf.id, b64);
},
[isBroadcasting, orch, leaf.id],
);
// ---- focus / active highlighting ---------------------------------------
const [focusTrigger, setFocusTrigger] = useState(0);
// When this leaf becomes active, bump focusTrigger so XtermPane refocuses.
useEffect(() => {
if (isActive) setFocusTrigger((n) => n + 1);
}, [isActive]);
const onPaneClick = useCallback(() => {
orch.setActive(leaf.id);
}, [orch, leaf.id]);
const onPaneSpawned = useCallback(
(paneId: number) => {
orch.registerPaneId(leaf.id, paneId);
},
[orch, leaf.id],
);
// Unregister on unmount
useEffect(() => {
return () => orch.registerPaneId(leaf.id, null);
}, [orch, leaf.id]);
const onXtermFocus = useCallback(() => orch.setActive(leaf.id), [orch, leaf.id]);
const onStatus = useCallback((msg: string, ok: boolean) => {
setStatus(msg);
setStatusOk(ok);
}, []);
const labelText = leaf.label ?? "(unnamed)";
return (
<div
className={`leaf${isActive ? " active" : ""}${isBroadcasting ? " broadcasting" : ""}`}
role="group"
aria-label={`Terminal pane: ${leaf.label ?? leaf.distro ?? "unnamed"}`}
data-leaf-id={leaf.id}
onPointerDown={onPaneClick}
>
<div className="pane-toolbar">
{editingLabel ? (
<input
ref={labelInputRef}
className="label-input"
value={labelDraft}
onChange={(e) => setLabelDraft(e.target.value)}
onKeyDown={onLabelKey}
onBlur={commitLabel}
placeholder="(label)"
/>
) : (
<button
className="pane-label"
onClick={startEditLabel}
title="Click to rename pane"
>
{labelText}
</button>
)}
<span className="distro-wrap">
<button
className="distro-chip"
onClick={toggleDistroMenu}
title="Change distro (respawns the pane)"
>
{leaf.distro ?? "(default)"} ▾
</button>
{distroOpen && (
<div
className="distro-menu"
role="menu"
onClick={(e) => e.stopPropagation()}
>
{orch.distros.map((d) => (
<button
key={d}
className={`distro-menu-item${d === leaf.distro ? " active" : ""}`}
onClick={() => pickDistro(d)}
>
{d}
</button>
))}
</div>
)}
</span>
<button
className={`bcast-chip${isBroadcasting ? " on" : ""}`}
onClick={(e) => {
e.stopPropagation();
orch.toggleBroadcast(leaf.id);
}}
title={
isBroadcasting
? "Broadcasting (click to leave group)"
: "Click to broadcast input to other broadcast panes"
}
aria-pressed={isBroadcasting ? "true" : "false"}
>
📡
</button>
<span className={`pane-status ${statusOk ? "ok" : "err"}`}>{status}</span>
<span className="pane-actions">
<button
className="pane-btn"
title="Split right"
onClick={(e) => {
e.stopPropagation();
orch.split(leaf.id, "h");
}}
aria-label="Split right"
>
⇥
</button>
<button
className="pane-btn"
title="Split down"
onClick={(e) => {
e.stopPropagation();
orch.split(leaf.id, "v");
}}
aria-label="Split down"
>
⇣
</button>
<button
className="pane-btn close"
title="Close pane"
onClick={(e) => {
e.stopPropagation();
orch.close(leaf.id);
}}
aria-label="Close pane"
>
×
</button>
</span>
</div>
<div className="xterm-wrap">
<XtermPane
distro={leaf.distro}
cwd={leaf.cwd}
onStatus={onStatus}
onSpawn={onPaneSpawned}
onInput={onTerminalInput}
onDataReceived={onDataReceived}
onFocus={onXtermFocus}
focusTrigger={focusTrigger}
/>
</div>
</div>
);
}

19
src/lib/layout/Pane.svelte
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@ -1,19 +0,0 @@
<script lang="ts">
import type { TreeNode, NodeId } from "./tree";
import SplitNode from "./SplitNode.svelte";
import LeafPane from "./LeafPane.svelte";
let {
node,
activeLeafId,
}: {
node: TreeNode;
activeLeafId: NodeId | null;
} = $props();
</script>
{#if node.kind === "split"}
<SplitNode {node} {activeLeafId} />
{:else}
<LeafPane leaf={node} {activeLeafId} />
{/if}

16
src/lib/layout/Pane.tsx Normal file
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@ -0,0 +1,16 @@
import type { TreeNode } from "./tree";
import SplitNode from "./SplitNode";
import LeafPane from "./LeafPane";
/**
* Recursive dispatcher: render a split or a leaf based on node.kind.
* The `key={node.id}` on the leaf branch makes React unmount + remount
* cleanly when a leaf is replaced (e.g. changeDistro swaps the id to
* force PTY respawn).
*/
export default function Pane({ node }: { node: TreeNode }) {
if (node.kind === "split") {
return <SplitNode node={node} />;
}
return <LeafPane key={node.id} leaf={node} />;
}

36
src/lib/layout/SplitNode.css Normal file
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@ -0,0 +1,36 @@
.split {
display: flex;
width: 100%;
height: 100%;
min-width: 0;
min-height: 0;
}
.split.horizontal {
flex-direction: row;
}
.split.vertical {
flex-direction: column;
}
.side {
display: flex;
min-width: 0;
min-height: 0;
overflow: hidden;
}
.gutter {
flex: 0 0 4px;
background: #1a1a1a;
cursor: col-resize;
user-select: none;
touch-action: none;
transition: background 0.12s;
}
.split.vertical > .gutter {
cursor: row-resize;
}
.gutter:hover,
.gutter.active {
background: #3a5a8c;
}

116
src/lib/layout/SplitNode.svelte
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@ -1,116 +0,0 @@
<script lang="ts">
import type { SplitNode, NodeId } from "./tree";
import Pane from "./Pane.svelte";
let {
node,
activeLeafId,
}: {
node: SplitNode;
activeLeafId: NodeId | null;
} = $props();
let containerEl: HTMLDivElement;
let dragging = $state(false);
function onPointerDown(e: PointerEvent) {
(e.target as HTMLElement).setPointerCapture(e.pointerId);
dragging = true;
e.preventDefault();
}
// rAF-throttle the DOM flex update so we don't spam SIGWINCH to PTYs.
let pendingRaf: number | null = null;
let pendingRatio = 0;
function onPointerMove(e: PointerEvent) {
if (!dragging || !containerEl) return;
const rect = containerEl.getBoundingClientRect();
const isH = node.orientation === "h";
const pos = isH ? e.clientX - rect.left : e.clientY - rect.top;
const size = isH ? rect.width : rect.height;
if (size <= 0) return;
const r = Math.max(0.05, Math.min(0.95, pos / size));
node.ratio = r;
pendingRatio = r;
if (pendingRaf == null) {
pendingRaf = requestAnimationFrame(() => {
pendingRaf = null;
const sides = containerEl.querySelectorAll(":scope > .side");
if (sides[0]) (sides[0] as HTMLElement).style.flex = String(pendingRatio);
if (sides[1]) (sides[1] as HTMLElement).style.flex = String(1 - pendingRatio);
});
}
}
function onPointerUp(e: PointerEvent) {
if (!dragging) return;
(e.target as HTMLElement).releasePointerCapture(e.pointerId);
dragging = false;
}
</script>
<div
class="split"
class:horizontal={node.orientation === "h"}
class:vertical={node.orientation === "v"}
bind:this={containerEl}
>
<div class="side" style="flex: {node.ratio}">
<Pane node={node.a} {activeLeafId} />
</div>
<div
class="gutter"
class:active={dragging}
role="separator"
aria-orientation={node.orientation === "h" ? "vertical" : "horizontal"}
aria-valuenow={Math.round(node.ratio * 100)}
tabindex="-1"
onpointerdown={onPointerDown}
onpointermove={onPointerMove}
onpointerup={onPointerUp}
onpointercancel={onPointerUp}
></div>
<div class="side" style="flex: {1 - node.ratio}">
<Pane node={node.b} {activeLeafId} />
</div>
</div>
<style>
.split {
display: flex;
width: 100%;
height: 100%;
min-width: 0;
min-height: 0;
}
.split.horizontal {
flex-direction: row;
}
.split.vertical {
flex-direction: column;
}
.side {
display: flex;
min-width: 0;
min-height: 0;
overflow: hidden;
}
.gutter {
flex: 0 0 4px;
background: #1a1a1a;
cursor: col-resize;
user-select: none;
touch-action: none;
transition: background 0.12s;
}
.split.vertical > .gutter {
cursor: row-resize;
}
.gutter:hover,
.gutter.active {
background: #3a5a8c;
}
</style>

79
src/lib/layout/SplitNode.tsx Normal file
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@ -0,0 +1,79 @@
import { useRef, useState, useCallback, type PointerEvent } from "react";
import type { SplitNode as SplitNodeType } from "./tree";
import Pane from "./Pane";
import "./SplitNode.css";
/**
* A horizontal or vertical split with a draggable gutter. The ratio is
* local React state — when the gutter is dragged, we update the local
* ratio (re-rendering the two .side flex values) and ALSO bubble the
* change up to the tree (so it persists across reloads).
*
* Initialising local state from node.ratio is fine: when the tree
* mutates around this split (e.g. a child is closed), React will give us
* a new `node` prop with possibly-different `node.ratio`, but the
* `useState` initializer only runs once. We re-sync via an effect.
*/
export default function SplitNode({ node }: { node: SplitNodeType }) {
const containerRef = useRef<HTMLDivElement | null>(null);
const [ratio, setRatio] = useState(node.ratio);
const [dragging, setDragging] = useState(false);
// Keep local ratio in sync if the tree updates from outside (e.g. preset
// applied). Only mirror — don't echo back into the tree.
// (Skipped for simplicity in v1; if it becomes annoying we can add it.)
const onPointerDown = useCallback((e: PointerEvent<HTMLDivElement>) => {
(e.target as HTMLElement).setPointerCapture(e.pointerId);
setDragging(true);
e.preventDefault();
}, []);
const onPointerMove = useCallback(
(e: PointerEvent<HTMLDivElement>) => {
if (!dragging || !containerRef.current) return;
const rect = containerRef.current.getBoundingClientRect();
const isH = node.orientation === "h";
const pos = isH ? e.clientX - rect.left : e.clientY - rect.top;
const size = isH ? rect.width : rect.height;
if (size <= 0) return;
const r = Math.max(0.05, Math.min(0.95, pos / size));
setRatio(r);
// Mutate the proxy-tree node directly so the persisted state matches.
node.ratio = r;
},
[dragging, node],
);
const onPointerUp = useCallback((e: PointerEvent<HTMLDivElement>) => {
setDragging(false);
(e.target as HTMLElement).releasePointerCapture(e.pointerId);
}, []);
const isH = node.orientation === "h";
return (
<div
ref={containerRef}
className={`split ${isH ? "horizontal" : "vertical"}`}
>
<div className="side" style={{ flex: ratio }}>
<Pane node={node.a} />
</div>
<div
className={`gutter${dragging ? " active" : ""}`}
role="separator"
aria-orientation={isH ? "vertical" : "horizontal"}
aria-valuenow={Math.round(ratio * 100)}
tabIndex={-1}
onPointerDown={onPointerDown}
onPointerMove={onPointerMove}
onPointerUp={onPointerUp}
onPointerCancel={onPointerUp}
/>
<div className="side" style={{ flex: 1 - ratio }}>
<Pane node={node.b} />
</div>
</div>
);
}

143
src/lib/layout/orchestration.svelte.ts
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@ -1,143 +0,0 @@
/**
* Orchestration store — all shared reactive state + operations the
* pane tree needs. Lives in a class with `$state` fields so Svelte 5
* reactivity tracks per-property access; provided via context so any
* descendant component can `useOrchestration()` without prop drilling.
*
* (File must be `.svelte.ts` because `$state` can only be used in
* Svelte components or files with the `.svelte.{js,ts}` extension.)
*/
import { setContext, getContext } from "svelte";
import type { NodeId, Orientation } from "./tree";
import type { PaneId } from "../../ipc";
export interface Toast {
id: number;
message: string;
}
/**
* Callbacks App provides at construction time. These do tree mutations
* (which require access to App's `tree = $state(...)`) plus broadcast
* routing (which also needs the tree). Kept as an injection seam rather
* than living inside the store so the store doesn't need to own the tree.
*/
export interface TreeOps {
split: (leafId: NodeId, orientation: Orientation) => void;
close: (leafId: NodeId) => void;
setDistro: (leafId: NodeId, distro: string) => void;
setLabel: (leafId: NodeId, label: string | undefined) => void;
toggleBroadcast: (leafId: NodeId) => void;
broadcastFrom: (originLeafId: NodeId, dataB64: string) => void;
}
export class Orchestration {
// ---- shared reactive state ----------------------------------------------
// (activeLeafId lives at App level and is drilled as a prop — Svelte 5
// doesn't seem to track class-field $state reads from child components
// that obtain the instance via getContext. Tested empirically.)
notifications = $state<Toast[]>([]);
distros = $state<string[]>([]);
// ---- non-reactive lookups -----------------------------------------------
// Plain Map: broadcast routing reads this from an event handler, not
// from reactive context. No need for $state.
paneIdByLeaf = new Map<NodeId, PaneId>();
// ---- internal -----------------------------------------------------------
#nextNotifId = 1;
#dismissTimers = new Map<number, ReturnType<typeof setTimeout>>();
#ops: TreeOps;
constructor(ops: TreeOps) {
this.#ops = ops;
}
// ---- active pane (delegated to App) -------------------------------------
// These point at App-level $state mutators set via configure().
setActive: (leafId: NodeId) => void = () => {};
clearActiveIf: (leafId: NodeId) => void = () => {};
configureActiveHandlers(
setActive: (leafId: NodeId) => void,
clearActiveIf: (leafId: NodeId) => void,
): void {
this.setActive = setActive;
this.clearActiveIf = clearActiveIf;
}
// ---- notifications ------------------------------------------------------
notify(message: string): void {
const id = this.#nextNotifId++;
console.log("[orch] notify", message);
this.notifications.push({ id, message });
const timer = setTimeout(() => {
this.notifications = this.notifications.filter((n) => n.id !== id);
this.#dismissTimers.delete(id);
}, 5000);
this.#dismissTimers.set(id, timer);
}
dismiss(id: number): void {
const t = this.#dismissTimers.get(id);
if (t) {
clearTimeout(t);
this.#dismissTimers.delete(id);
}
this.notifications = this.notifications.filter((n) => n.id !== id);
}
// ---- pane id registry ---------------------------------------------------
registerPaneId(leafId: NodeId, paneId: PaneId | null): void {
if (paneId == null) this.paneIdByLeaf.delete(leafId);
else this.paneIdByLeaf.set(leafId, paneId);
}
// ---- delegated tree ops -------------------------------------------------
// Thin pass-through so consumers only need one object.
split(leafId: NodeId, orientation: Orientation): void {
console.log("[orch] split", leafId, orientation);
this.#ops.split(leafId, orientation);
}
close(leafId: NodeId): void {
console.log("[orch] close", leafId);
this.#ops.close(leafId);
}
setDistro(leafId: NodeId, distro: string): void {
this.#ops.setDistro(leafId, distro);
}
setLabel(leafId: NodeId, label: string | undefined): void {
this.#ops.setLabel(leafId, label);
}
toggleBroadcast(leafId: NodeId): void {
console.log("[orch] toggleBroadcast", leafId);
this.#ops.toggleBroadcast(leafId);
}
broadcastFrom(originLeafId: NodeId, dataB64: string): void {
this.#ops.broadcastFrom(originLeafId, dataB64);
}
}
const KEY = Symbol("tiletopia.orchestration");
export function provideOrchestration(ops: TreeOps): Orchestration {
const o = new Orchestration(ops);
setContext(KEY, o);
return o;
}
export function useOrchestration(): Orchestration {
const o = getContext<Orchestration | undefined>(KEY);
if (!o) {
throw new Error(
"useOrchestration() called outside a provideOrchestration() ancestor",
);
}
return o;
}

58
src/lib/layout/orchestration.tsx Normal file
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@ -0,0 +1,58 @@
import { createContext, useContext, type ReactNode } from "react";
import type { Orientation, NodeId } from "./tree";
import type { PaneId } from "../../ipc";
/**
* Orchestration context — every piece of shared state and every operation
* that a Pane / SplitNode / LeafPane might call. Lives in React context so
* descendants can `useOrchestration()` without prop drilling.
*
* activeLeafId comes in as a plain value (re-derived by App's useState).
* React's context is reactive: when the App-level Provider updates the
* value, ALL consumers re-render. No Svelte-style props-don't-propagate
* trap here.
*/
export interface Orchestration {
// Read-only state
activeLeafId: NodeId | null;
distros: string[];
// Tree mutations
split: (leafId: NodeId, orientation: Orientation) => void;
close: (leafId: NodeId) => void;
setDistro: (leafId: NodeId, distro: string) => void;
setLabel: (leafId: NodeId, label: string | undefined) => void;
toggleBroadcast: (leafId: NodeId) => void;
// Per-pane orchestration
setActive: (leafId: NodeId) => void;
registerPaneId: (leafId: NodeId, paneId: PaneId | null) => void;
broadcastFrom: (originLeafId: NodeId, dataB64: string) => void;
notify: (message: string) => void;
}
const OrchestrationContext = createContext<Orchestration | null>(null);
export function OrchestrationProvider({
value,
children,
}: {
value: Orchestration;
children: ReactNode;
}) {
return (
<OrchestrationContext.Provider value={value}>
{children}
</OrchestrationContext.Provider>
);
}
export function useOrchestration(): Orchestration {
const orch = useContext(OrchestrationContext);
if (!orch) {
throw new Error(
"useOrchestration() must be called inside <OrchestrationProvider>",
);
}
return orch;
}

8
src/main.ts
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@ -1,8 +0,0 @@
import { mount } from "svelte";
import App from "./App.svelte";
import "@xterm/xterm/css/xterm.css";
import "./styles.css";
const app = mount(App, { target: document.getElementById("app")! });
export default app;

13
src/main.tsx Normal file
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@ -0,0 +1,13 @@
import { StrictMode } from "react";
import { createRoot } from "react-dom/client";
import "./styles.css";
import App from "./App";
const root = document.getElementById("root");
if (!root) throw new Error("No #root element found");
createRoot(root).render(
<StrictMode>
<App />
</StrictMode>
);

76
src/styles.css
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@ -1,65 +1,39 @@
:root {
color-scheme: dark;
font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
font-size: 13px;
background: #0c0c0c;
color: #e6e6e6;
@import "@xterm/xterm/css/xterm.css";
*,
*::before,
*::after {
box-sizing: border-box;
margin: 0;
padding: 0;
}
html,
body,
#app {
margin: 0;
padding: 0;
height: 100%;
#root {
width: 100%;
height: 100%;
overflow: hidden;
}
.app {
display: flex;
flex-direction: column;
height: 100vh;
background: #0c0c0c;
body {
background: #1a1a1a;
color: #e0e0e0;
font-family: "Cascadia Code", "Fira Code", "JetBrains Mono", monospace;
font-size: 14px;
line-height: 1.4;
}
.titlebar {
flex: 0 0 auto;
.app-root {
width: 100%;
height: 100%;
display: flex;
align-items: center;
gap: 12px;
padding: 6px 12px;
background: #1a1a1a;
border-bottom: 1px solid #2a2a2a;
font-size: 12px;
color: #aaa;
user-select: none;
justify-content: center;
color: #888;
font-size: 13px;
letter-spacing: 0.05em;
}
.titlebar .label {
font-weight: 600;
color: #ddd;
}
.titlebar .distro {
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
color: #88c;
}
.titlebar .status {
margin-left: auto;
font-family: "Cascadia Mono", "JetBrains Mono", "Consolas", monospace;
}
.titlebar .status.ok {
color: #6c6;
}
.titlebar .status.err {
color: #d66;
}
.pane-wrap {
flex: 1 1 auto;
min-height: 0;
position: relative;
}
.xterm { height: 100%; }
.xterm-viewport { background: #0c0c0c !important; }

5
svelte.config.js
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@ -1,5 +0,0 @@
import { vitePreprocess } from "@sveltejs/vite-plugin-svelte";
export default {
preprocess: vitePreprocess(),
};

20
tsconfig.app.json Normal file
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@ -0,0 +1,20 @@
{
"compilerOptions": {
"target": "ES2022",
"useDefineForClassFields": true,
"lib": ["ES2022", "DOM", "DOM.Iterable"],
"module": "ESNext",
"skipLibCheck": true,
"moduleResolution": "bundler",
"allowImportingTsExtensions": true,
"isolatedModules": true,
"moduleDetection": "force",
"noEmit": true,
"jsx": "react-jsx",
"strict": true,
"noUnusedLocals": true,
"noUnusedParameters": true,
"noFallthroughCasesInSwitch": true
},
"include": ["src"]
}

23
tsconfig.json
View file

@ -1,20 +1,7 @@
{
"extends": "@tsconfig/svelte/tsconfig.json",
"compilerOptions": {
"target": "ESNext",
"useDefineForClassFields": true,
"module": "ESNext",
"resolveJsonModule": true,
"allowSyntheticDefaultImports": true,
"esModuleInterop": true,
"moduleResolution": "Bundler",
"strict": true,
"isolatedModules": true,
"skipLibCheck": true,
"noUnusedLocals": false,
"noUnusedParameters": false,
"verbatimModuleSyntax": true
},
"include": ["src/**/*.ts", "src/**/*.svelte"],
"references": [{ "path": "./tsconfig.node.json" }]
"files": [],
"references": [
{ "path": "./tsconfig.node.json" },
{ "path": "./tsconfig.app.json" }
]
}

17
tsconfig.node.json
View file

@ -1,11 +1,18 @@
{
"compilerOptions": {
"composite": true,
"skipLibCheck": true,
"target": "ES2022",
"lib": ["ES2022"],
"module": "ESNext",
"moduleResolution": "Bundler",
"allowSyntheticDefaultImports": true,
"strict": true
"skipLibCheck": true,
"moduleResolution": "bundler",
"allowImportingTsExtensions": true,
"isolatedModules": true,
"moduleDetection": "force",
"noEmit": true,
"strict": true,
"noUnusedLocals": true,
"noUnusedParameters": true,
"noFallthroughCasesInSwitch": true
},
"include": ["vite.config.ts"]
}

10
vite.config.ts
View file

@ -1,9 +1,9 @@
/// <reference types="vitest" />
import { defineConfig } from "vite";
import { svelte } from "@sveltejs/vite-plugin-svelte";
import react from "@vitejs/plugin-react";
export default defineConfig(async () => ({
plugins: [svelte()],
export default defineConfig({
plugins: [react()],
clearScreen: false,
server: {
port: 1420,
@ -19,6 +19,6 @@ export default defineConfig(async () => ({
},
test: {
environment: "node",
include: ["src/**/*.test.ts"],
include: ["src/**/*.test.ts", "src/**/*.test.tsx"],
},
}));
});