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Open external links via Steam overlay browser on Steam Deck

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Steam Deck / Big Picture (gamepad UI) has no registered default web browser,
so shell.openExternal(httpUrl) -> xdg-open falls back to the KDE Discover store
(a Firefox-install prompt) instead of opening the page. This broke 'Connect with
tone3000' and every external link on the Deck.

When RUNNING_UNDER_STEAM_GAMEPAD_UI (linux + SteamGamepadUI/SteamDeck env),
route web links through Steam's overlay browser via steam://openurl/, with a
fallback to the normal OS opener. Desktop platforms are unaffected. The tone3000
OAuth callback redirects to 127.0.0.1 on the device, so auth must complete in an
on-device browser — the Steam overlay browser reaches localhost.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Jafz2001 2026-07-15 14:26:17 -04:00
parent 4dc68a2a28
commit 9388eb248f
1 changed files with 23 additions and 0 deletions
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23
src/main/main.ts
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@ -835,6 +835,20 @@ function createWindow(port: number): void {
}
}
// Steam Deck (and Big Picture / "gamepad UI") ships with NO registered default
// web browser, so `shell.openExternal(httpUrl)` → xdg-open falls back to the KDE
// Discover store (a Firefox-install prompt) instead of opening the page. That
// broke "Connect with tone3000" and every other external link on the Deck. When
// we detect that we're running under Steam's gamepad UI, route web links through
// Steam's own overlay browser via the `steam://openurl/` handler, which works in
// that mode (and can still reach the OAuth callback on 127.0.0.1). Gate on the
// Steam env signals so ordinary desktop Linux (where a real browser exists) is
// untouched. Set by the Steam client: `SteamDeck=1` (Deck hardware),
// `SteamGamepadUI=1` (gamepad/Big-Picture UI where there is no browser).
const RUNNING_UNDER_STEAM_GAMEPAD_UI =
process.platform === 'linux' &&
(process.env.SteamGamepadUI === '1' || process.env.SteamDeck === '1');
// Forward a URL to the OS default browser only if it's a web URL.
// `shell.openExternal` will gladly hand any string to the user's
// registered protocol handlers (file:, javascript:, mailto:, custom
@ -856,6 +870,15 @@ function openWebUrlExternally(url: string): void {
// strings can carry whitespace / control characters that the URL
// parser strips, and openExternal should see exactly the bytes we
// validated.
if (RUNNING_UNDER_STEAM_GAMEPAD_UI) {
// Open in Steam's overlay browser. If Steam isn't handling steam://
// (e.g. launched outside Steam), fall back to the normal OS opener so
// we never silently drop the link.
shell.openExternal(`steam://openurl/${parsed.href}`).catch(() => {
shell.openExternal(parsed.href).catch(() => { /* user dismissed / system error */ });
});
return;
}
shell.openExternal(parsed.href).catch(() => { /* user dismissed / system error */ });
}