subscribe method

void subscribe(AutoRouteAware routeAware, RouteData route)

Subscribe AutoRouteAware to be informed about changes to route.

Going forward, AutoRouteAware will be informed about qualifying changes to route, e.g. when route is covered by another route or when route is popped off the Navigator stack.

Implementation

void subscribe(AutoRouteAware routeAware, RouteData route) {
  final Set<AutoRouteAware> subscribers = _listeners.putIfAbsent(route.key, () => <AutoRouteAware>{});
  if (subscribers.add(routeAware)) {
    final router = route.router;
    if (router is TabsRouter) {
      final previousIndex = router.previousIndex;
      if (previousIndex != null && previousIndex >= 0 && previousIndex < router.stackData.length) {
        final previousRoute = TabPageRoute(
          routeInfo: router.stackData[previousIndex].route,
          index: previousIndex,
        );
        routeAware.didInitTabRoute(previousRoute);
      } else {
        routeAware.didInitTabRoute(null);
      }
    } else {
      routeAware.didPush();
    }
  }
}