package nasin

import "git.tebibyte.media/tomo/tomo"
import "git.tebibyte.media/tomo/tomo/event"

var manager struct {
	count int
}

// WaitFor ensures that the application will stay running while the given window
// is open.
func WaitFor (window tomo.Window) event.Cookie {
	manager.count ++
	
	isManaged := true
	handleClose := func () {
		if !isManaged { return }
		isManaged = false
		manager.count --
		if manager.count < 1 {
			tomo.Stop()
		}
	}

	handleWaitClose := func () error {
		handleClose();
		return nil
	}

	return event.MultiCookie (
		window.OnClose(handleClose),
		event.FuncCookie(handleWaitClose))
}