Method add_observer

src/server/scene/surface_stack.cpp:566–580

}

void ms::SurfaceStack::add_observer(std::shared_ptr<ms::Observer> const& observer)
{
    observers.add(observer);

    // Notify observer of existing surfaces.
    //
    // The surfaces are sent with the most-recently focused first and the
    // least-recently focused last.
    RecursiveReadLock lk(guard);
    for (auto const& surface : std::ranges::reverse_view(focus_order))
    {
        if (auto const locked = surface.lock())
            observer->surface_exists(locked);
    }
}

void ms::SurfaceStack::remove_observer(std::weak_ptr<ms::Observer> const& observer)
{