feat(examples): add counter and notes demo apps

- examples/org.weft.demo.counter: stateless counter Wasm component
  using weft:app/ipc for increment/decrement/reset; built for
  wasm32-wasip2 with wit-bindgen 0.53; dark-themed HTML UI
- examples/org.weft.demo.notes: persistent notes Wasm component
  using weft:app/ipc + WASI preopened /data dir (fs:rw:app-data);
  save/load via newline-delimited IPC protocol; HTML textarea UI
- examples/keys/: committed demo Ed25519 keypair; both packages
  signed with weft-pack sign
- workspace Cargo.toml: exclude examples from workspace members
  (they target wasm32-wasip2, not the host toolchain)
- SERVO_PIN.md: update deps section and document shell-client display sharing resolved in
  full description of connect_with_display implementation
This commit is contained in:
Marco Allegretti 2026-03-12 15:31:20 +01:00
parent 34359acf3f
commit 794f6c2225
24 changed files with 1227 additions and 17 deletions

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@ -11,6 +11,10 @@ members = [
"crates/weft-runtime", "crates/weft-runtime",
"crates/weft-servo-shell", "crates/weft-servo-shell",
] ]
exclude = [
"examples/org.weft.demo.counter",
"examples/org.weft.demo.notes",
]
resolver = "2" resolver = "2"
[workspace.package] [workspace.package]

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@ -10,12 +10,14 @@
| Crate | `servo` (package name as of 2026-03-11; previously `libservo`) | | Crate | `servo` (package name as of 2026-03-11; previously `libservo`) |
| Feature | `servo-embed` (optional; off by default) | | Feature | `servo-embed` (optional; off by default) |
## Adding the Cargo dependencies ## Cargo dependencies
The Servo deps are **not** in `Cargo.toml` by default to avoid pulling the The Servo deps are wired in `crates/weft-servo-shell/Cargo.toml` and
Servo monorepo (~1 GB) into every `cargo check` cycle. To activate, add the `crates/weft-app-shell/Cargo.toml` under the `servo-embed` optional feature.
following to `crates/weft-servo-shell/Cargo.toml` and change the `servo-embed` They are off by default to avoid pulling the Servo monorepo (~1 GB) into every
feature line to declare `dep:servo`, `dep:winit`, and `dep:softbuffer`: `cargo check` cycle.
Current `Cargo.toml` block (already committed):
```toml ```toml
[features] [features]
@ -37,7 +39,7 @@ version = "0.4"
optional = true optional = true
``` ```
Then build: To build:
```sh ```sh
cargo build -p weft-servo-shell --features servo-embed cargo build -p weft-servo-shell --features servo-embed
@ -75,17 +77,15 @@ DMA-BUF buffer sharing with the compositor transparently.
- **GAP-1**: ~~Wayland input events not forwarded to Servo~~ **Resolved** — keyboard and - **GAP-1**: ~~Wayland input events not forwarded to Servo~~ **Resolved** — keyboard and
mouse events forwarded via `webview.notify_input_event`; key mapping in `keyutils.rs`. mouse events forwarded via `webview.notify_input_event`; key mapping in `keyutils.rs`.
- **GAP-2**: EGL `WindowRenderingContext` path scaffolded (`WEFT_EGL_RENDERING=1`). - **GAP-2**: ~~`ZweftShellWindowV1` created with `surface = null`~~ **Resolved**
When EGL is active, Servo presents frames via surfman's `eglSwapBuffers`; Mesa handles `ShellClient::connect_with_display(display_ptr, surface_ptr)` uses
DMA-BUF buffer sharing with the compositor transparently — no explicit `Backend::from_foreign_display` to share winit's `wl_display` connection; the winit
`zwp_linux_dmabuf_v1` code is needed in the shell for basic rendering. `wl_surface` pointer is passed directly to `create_window`, associating the compositor
The `zweft_shell_manager_v1` event queue is now dispatched each frame so `configure`, shell slot with the actual rendered surface. `ShellClient` is now constructed inside
`focus_changed`, and `window_closed` events are processed; `window_closed` triggers a `resumed()` after the winit window exists, not before the event loop. EGL path and
clean Servo shutdown. per-frame event dispatch are unchanged.
Remaining gap: the `ZweftShellWindowV1` is created with `surface = null`; the winit Protocol note: `wayland-scanner 0.31` generates `_type` (not `r#type`) for the
`wl_surface` is not yet associated with the shell window slot (requires sharing a single `navigation_gesture` event arg named `type`.
Wayland connection between winit and the shell client, which is not currently feasible
without significant refactoring).
- **GAP-3**: WebGPU adapter on Mesa may fail CTS — validation task, requires Mesa GPU hardware. - **GAP-3**: WebGPU adapter on Mesa may fail CTS — validation task, requires Mesa GPU hardware.
- **GAP-4**: ~~CSS Grid~~ **Grid resolved** (Taffy-backed, fully wired). - **GAP-4**: ~~CSS Grid~~ **Grid resolved** (Taffy-backed, fully wired).
~~CSS `backdrop-filter` unimplemented~~ **`backdrop-filter` resolved** (servo/servo issue ~~CSS `backdrop-filter` unimplemented~~ **`backdrop-filter` resolved** (servo/servo issue

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@ -0,0 +1 @@
6322e10dadbbe0f0d95fa113278392eac87768826167dd1cfcb3cc1cb7e43312

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@ -0,0 +1 @@
470490314923b5f51d96196a6dee67e831f0b758119b8558d83cf415088fe062

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@ -0,0 +1,2 @@
[build]
target = "wasm32-wasip2"

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examples/org.weft.demo.counter/Cargo.lock generated Normal file
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@ -0,0 +1,321 @@
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@ -0,0 +1,17 @@
[package]
name = "org-weft-demo-counter"
version = "0.1.0"
edition = "2024"
[[bin]]
name = "app"
path = "src/main.rs"
[dependencies]
wit-bindgen = "0.53"
serde_json = "1"
[profile.release]
opt-level = "z"
strip = true
lto = true

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@ -0,0 +1,42 @@
wit_bindgen::generate!({
path: "wit",
world: "app",
with: {
"weft:app/notify@0.1.0": generate,
"weft:app/ipc@0.1.0": generate,
},
});
use weft::app::{ipc, notify};
fn main() {
notify::ready();
let mut count: i32 = 0;
loop {
if let Some(raw) = ipc::recv() {
let reply = match raw.trim() {
"increment" => {
count += 1;
format!("{{\"count\":{count}}}")
}
"decrement" => {
count -= 1;
format!("{{\"count\":{count}}}")
}
"reset" => {
count = 0;
format!("{{\"count\":{count}}}")
}
"get" => {
format!("{{\"count\":{count}}}")
}
_ => continue,
};
let _ = ipc::send(&reply);
} else {
std::thread::sleep(std::time::Duration::from_millis(10));
}
}
}

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@ -0,0 +1,144 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Counter</title>
<style>
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
background: #0f0f0f;
color: #e8e8e8;
display: flex;
align-items: center;
justify-content: center;
min-height: 100vh;
}
.card {
background: #1a1a1a;
border: 1px solid #2a2a2a;
border-radius: 16px;
padding: 48px 64px;
display: flex;
flex-direction: column;
align-items: center;
gap: 32px;
min-width: 320px;
}
h1 {
font-size: 14px;
font-weight: 500;
letter-spacing: 0.12em;
text-transform: uppercase;
color: #666;
}
#count {
font-size: 96px;
font-weight: 700;
font-variant-numeric: tabular-nums;
line-height: 1;
min-width: 3ch;
text-align: center;
transition: color 0.15s;
}
#count.negative { color: #e05252; }
#count.positive { color: #e8e8e8; }
.controls {
display: flex;
gap: 12px;
}
button {
width: 56px;
height: 56px;
border-radius: 12px;
border: 1px solid #333;
background: #222;
color: #e8e8e8;
font-size: 24px;
font-weight: 300;
cursor: pointer;
transition: background 0.1s, transform 0.08s;
display: flex;
align-items: center;
justify-content: center;
line-height: 1;
}
button:hover { background: #2e2e2e; }
button:active { transform: scale(0.94); }
#reset {
font-size: 13px;
font-weight: 500;
letter-spacing: 0.04em;
width: auto;
padding: 0 20px;
color: #888;
border-color: #2a2a2a;
}
#status {
font-size: 12px;
color: #444;
min-height: 16px;
}
</style>
</head>
<body>
<div class="card">
<h1>Counter</h1>
<div id="count" class="positive">0</div>
<div class="controls">
<button id="dec" aria-label="Decrement"></button>
<button id="reset">Reset</button>
<button id="inc" aria-label="Increment">+</button>
</div>
<div id="status">connecting…</div>
</div>
<script>
(function () {
var countEl = document.getElementById('count');
var statusEl = document.getElementById('status');
function applyCount(n) {
countEl.textContent = n;
countEl.className = n < 0 ? 'negative' : 'positive';
}
function send(action) {
if (window.weftIpc) {
window.weftIpc.send(action);
}
}
document.getElementById('inc').addEventListener('click', function () { send('increment'); });
document.getElementById('dec').addEventListener('click', function () { send('decrement'); });
document.getElementById('reset').addEventListener('click', function () { send('reset'); });
document.addEventListener('keydown', function (e) {
if (e.key === 'ArrowUp' || e.key === '+') send('increment');
if (e.key === 'ArrowDown' || e.key === '-') send('decrement');
if (e.key === 'r' || e.key === 'R') send('reset');
});
function setupIpc() {
if (!window.weftIpc) {
setTimeout(setupIpc, 50);
return;
}
statusEl.textContent = '';
send('get');
window.weftIpc.onmessage = function (raw) {
try {
var msg = typeof raw === 'string' ? JSON.parse(raw) : raw;
if (typeof msg.count === 'number') {
applyCount(msg.count);
}
} catch (_) {}
};
}
setupIpc();
})();
</script>
</body>
</html>

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@ -0,0 +1,12 @@
[package]
id = "org.weft.demo.counter"
name = "Counter"
version = "0.1.0"
description = "Stateless counter demonstrating weft:app/ipc"
author = "WEFT OS"
[runtime]
module = "app.wasm"
[ui]
entry = "ui/index.html"

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@ -0,0 +1,38 @@
package weft:app@0.1.0;
interface notify {
ready: func();
}
interface ipc {
send: func(payload: string) -> result<_, string>;
recv: func() -> option<string>;
}
interface fetch {
record response {
status: u16,
content-type: string,
body: list<u8>,
}
fetch: func(
url: string,
method: string,
headers: list<tuple<string, string>>,
body: option<list<u8>>,
) -> result<response, string>;
}
interface notifications {
notify: func(
title: string,
body: string,
icon: option<string>,
) -> result<_, string>;
}
interface clipboard {
read: func() -> result<string, string>;
write: func(text: string) -> result<_, string>;
}

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@ -0,0 +1,6 @@
package org:weft-demo-counter@0.1.0;
world app {
import weft:app/notify@0.1.0;
import weft:app/ipc@0.1.0;
}

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@ -0,0 +1,2 @@
[build]
target = "wasm32-wasip2"

321
examples/org.weft.demo.notes/Cargo.lock generated Normal file
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@ -0,0 +1,321 @@
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 4
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View file

@ -0,0 +1,17 @@
[package]
name = "org-weft-demo-notes"
version = "0.1.0"
edition = "2024"
[[bin]]
name = "app"
path = "src/main.rs"
[dependencies]
wit-bindgen = "0.53"
serde_json = "1"
[profile.release]
opt-level = "z"
strip = true
lto = true

Binary file not shown.

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@ -0,0 +1 @@
e781544104eee4538e17f953ea3223903e2b2a46a78705cd1ffa8d6946a62d0385c76eab2cc1c2533eecbeff7600e76a4205abc66915be8851fe2e71316ebc0d

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@ -0,0 +1,59 @@
wit_bindgen::generate!({
path: "wit",
world: "app",
with: {
"weft:app/notify@0.1.0": generate,
"weft:app/ipc@0.1.0": generate,
},
});
use weft::app::{ipc, notify};
const NOTES_PATH: &str = "/data/notes.txt";
fn load_notes() -> String {
std::fs::read_to_string(NOTES_PATH).unwrap_or_default()
}
fn save_notes(text: &str) -> Result<(), String> {
std::fs::write(NOTES_PATH, text).map_err(|e| e.to_string())
}
fn json_text(text: &str) -> String {
let escaped = text
.replace('\\', "\\\\")
.replace('"', "\\\"")
.replace('\n', "\\n")
.replace('\r', "\\r")
.replace('\t', "\\t");
format!("{{\"text\":\"{escaped}\"}}")
}
fn json_error(msg: &str) -> String {
let escaped = msg.replace('"', "\\\"");
format!("{{\"error\":\"{escaped}\"}}")
}
fn main() {
notify::ready();
loop {
if let Some(raw) = ipc::recv() {
let raw = raw.trim().to_owned();
let reply = if raw == "load" {
json_text(&load_notes())
} else if let Some(rest) = raw.strip_prefix("save:") {
let text = rest.replace("\\n", "\n");
match save_notes(&text) {
Ok(()) => json_text(&text),
Err(e) => json_error(&e),
}
} else {
continue;
};
let _ = ipc::send(&reply);
} else {
std::thread::sleep(std::time::Duration::from_millis(10));
}
}
}

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@ -0,0 +1,164 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Notes</title>
<style>
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
background: #0f0f0f;
color: #e8e8e8;
display: flex;
flex-direction: column;
height: 100vh;
padding: 24px;
gap: 16px;
}
header {
display: flex;
align-items: center;
justify-content: space-between;
flex-shrink: 0;
}
h1 {
font-size: 14px;
font-weight: 500;
letter-spacing: 0.12em;
text-transform: uppercase;
color: #666;
}
.actions {
display: flex;
gap: 8px;
align-items: center;
}
button {
height: 32px;
padding: 0 16px;
border-radius: 8px;
border: 1px solid #2a2a2a;
background: #1a1a1a;
color: #e8e8e8;
font-size: 13px;
font-weight: 500;
cursor: pointer;
transition: background 0.1s;
}
button:hover { background: #222; }
button:active { background: #2a2a2a; }
button.primary {
background: #2a2a2a;
border-color: #444;
}
button.primary:hover { background: #333; }
textarea {
flex: 1;
background: #1a1a1a;
border: 1px solid #2a2a2a;
border-radius: 12px;
color: #e8e8e8;
font-family: inherit;
font-size: 15px;
line-height: 1.6;
padding: 20px;
resize: none;
outline: none;
transition: border-color 0.15s;
}
textarea:focus { border-color: #444; }
textarea::placeholder { color: #444; }
footer {
display: flex;
align-items: center;
justify-content: space-between;
flex-shrink: 0;
height: 20px;
}
#status {
font-size: 12px;
color: #444;
}
#charcount {
font-size: 12px;
color: #444;
font-variant-numeric: tabular-nums;
}
</style>
</head>
<body>
<header>
<h1>Notes</h1>
<div class="actions">
<button id="discard">Discard</button>
<button class="primary" id="save">Save</button>
</div>
</header>
<textarea id="editor" placeholder="Start typing…" spellcheck="false"></textarea>
<footer>
<span id="status">connecting…</span>
<span id="charcount">0 chars</span>
</footer>
<script>
(function () {
var editor = document.getElementById('editor');
var statusEl = document.getElementById('status');
var charEl = document.getElementById('charcount');
var saved = '';
function setStatus(msg) { statusEl.textContent = msg; }
editor.addEventListener('input', function () {
charEl.textContent = editor.value.length + ' chars';
});
document.getElementById('save').addEventListener('click', function () {
if (!window.weftIpc) return;
var text = editor.value.replace(/\n/g, '\\n');
window.weftIpc.send('save:' + text);
setStatus('saving…');
});
document.getElementById('discard').addEventListener('click', function () {
editor.value = saved;
charEl.textContent = saved.length + ' chars';
setStatus('discarded');
setTimeout(function () { setStatus(''); }, 1500);
});
document.addEventListener('keydown', function (e) {
if ((e.ctrlKey || e.metaKey) && e.key === 's') {
e.preventDefault();
document.getElementById('save').click();
}
});
function setupIpc() {
if (!window.weftIpc) { setTimeout(setupIpc, 50); return; }
window.weftIpc.onmessage = function (raw) {
try {
var msg = typeof raw === 'string' ? JSON.parse(raw) : raw;
if (typeof msg.error === 'string') {
setStatus('error: ' + msg.error);
return;
}
if (typeof msg.text === 'string') {
var text = msg.text.replace(/\\n/g, '\n');
editor.value = text;
saved = text;
charEl.textContent = text.length + ' chars';
setStatus('');
}
} catch (_) {}
};
setStatus('');
window.weftIpc.send('load');
}
setupIpc();
})();
</script>
</body>
</html>

View file

@ -0,0 +1,13 @@
[package]
id = "org.weft.demo.notes"
name = "Notes"
version = "0.1.0"
description = "Persistent notes demonstrating fs:rw:app-data via weft:app/ipc"
author = "WEFT OS"
capabilities = ["fs:rw:app-data"]
[runtime]
module = "app.wasm"
[ui]
entry = "ui/index.html"

View file

@ -0,0 +1,38 @@
package weft:app@0.1.0;
interface notify {
ready: func();
}
interface ipc {
send: func(payload: string) -> result<_, string>;
recv: func() -> option<string>;
}
interface fetch {
record response {
status: u16,
content-type: string,
body: list<u8>,
}
fetch: func(
url: string,
method: string,
headers: list<tuple<string, string>>,
body: option<list<u8>>,
) -> result<response, string>;
}
interface notifications {
notify: func(
title: string,
body: string,
icon: option<string>,
) -> result<_, string>;
}
interface clipboard {
read: func() -> result<string, string>;
write: func(text: string) -> result<_, string>;
}

View file

@ -0,0 +1,6 @@
package org:weft-demo-notes@0.1.0;
world app {
import weft:app/notify@0.1.0;
import weft:app/ipc@0.1.0;
}