Files
OSGKeyboard/OSGKeyboardExt/Services/HostAppLauncher.swift
T
Rocky 9ef0196d52 feat(flow): harden host handoff, session UX, and Live Activity brand
- fix(keyboard): drop unusable extensionContext.open; report the real
  result of UIApplication.open and cancel the start watchdog immediately
  on failure with clear "open OSGKeyboard" guidance instead of a 30s spin
- feat(capture): recover from audio route changes (AirPods/wired headset
  plug-unplug) and phone-call interruptions by rebuilding the engine/tap
  against the live hardware format
- feat(home): add a "Start" button in the Home footer when a session is
  inactive and permissions are granted (no-jump manual restart)
- feat(hostapps): expand the return whitelist to 46 apps (Signal, Zoom,
  Instagram, X, Douyin, Zhihu, Bilibili, Things, Firefox, ...) with
  en/zh-Hans names and synced LSApplicationQueriesSchemes
- feat(island): use a "ready" checkmark instead of a mic glyph while idle
  and set a staleDate so an orphaned Live Activity fades after a force-quit
- feat(coldstart): use the template OSG brand mark instead of a system
  waveform glyph in the cold-start overlay
- perf(keyboard): rely on Darwin notifications as the primary session
  signal and drop the fallback poll from 1s to 3s
- fix(keyboard): remove the redundant "Start" text button next to the
  inactive-session hint on the keyboard
- docs: correct the per-take cap to 210s (3.5 min) and document that
  force-quitting no longer resurrects the session (tracker + READMEs)
2026-07-06 17:56:10 +08:00

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// HostAppLauncher.swift
// OSGKeyboard · Keyboard Extension
//
// Opens the host app from the keyboard extension.
//
// Reality check (verified against iOS 1826 behaviour):
// • `extensionContext.open` is documented for Today widgets only; for a
// keyboard extension it resolves `false`, so we do not use it.
// • The deprecated `openURL:` selector hack was disabled in iOS 18
// ("BUG IN CLIENT OF UIKIT … migrate to open(_:options:completionHandler:)").
// • The still-working path is: walk the responder chain to `UIApplication`
// and call the non-deprecated `open(_:options:completionHandler:)`. This
// requires Full Access and grows less reliable on newer iOS, so we report
// the *real* success from the completion handler instead of assuming it
// worked — callers degrade to on-keyboard guidance when it returns false.
import UIKit
enum HostAppLauncher {
@MainActor
static func open(
url: URL,
from controller: KeyboardViewController,
completion: @escaping @MainActor (Bool) -> Void
) {
var responder: UIResponder? = controller
while let current = responder {
if let application = current as? UIApplication {
application.open(url, options: [:]) { success in
Task { @MainActor in completion(success) }
}
return
}
responder = current.next
}
// No `UIApplication` in the responder chain — cannot open the host app.
completion(false)
}
}