import Adw

extension WidgetView where Target: Adw.ToastOverlay {
    /// Attaches `manager` to this overlay so ``ToastManager/addToast(_:)`` and
    /// ``ToastManager/dismissAll()`` act on it.
    ///
    /// Any toasts the manager queued before mount are flushed immediately. The
    /// manager detaches on subtree teardown.
    ///
    /// ``ToastManager`` is a reference type, so pass it directly - no
    /// ``Binding`` is involved, mirroring ``View/environment(_:)``.
    ///
    /// - Parameter manager: The manager to attach.
    /// - Returns: A copy of this view with the manager attached at mount time.
    public func toastManager(_ manager: ToastManager) -> Self {
        appending { w, ctx in
            manager._attach(w)
            ctx.registry.add(SubscriptionToken { manager._detach(w) })
        }
    }
}