Bug 1917794 [Wayland] Store gesture nsWindow instead of wl_surface r=emilio

void nsWaylandDisplay::SetShm(wl_shm* aShm) { mShm = aShm; }

class EventSurface {

class TouchWindow {

 public:

  nsWindow* GetWindow() {

    if (!surface) {

      return nullptr;

    }

  already_AddRefed<nsWindow> GetAndClearWindow() { return mWindow.forget(); }

  RefPtr<nsWindow> TakeWindow(wl_surface* aSurface) {

    GdkWindow* window =

        static_cast<GdkWindow*>(wl_surface_get_user_data(surface));

    return window ? static_cast<nsWindow*>(

        static_cast<GdkWindow*>(wl_surface_get_user_data(aSurface));

    mWindow = window ? static_cast<nsWindow*>(

                           g_object_get_data(G_OBJECT(window), "nsWindow"))

                     : nullptr;

    return mWindow;

  }

  void Set(wl_surface* aSurface) { surface = aSurface; }

  void Clear() { surface = nullptr; }

 private:

  wl_surface* surface = nullptr;

  StaticRefPtr<nsWindow> mWindow;

};

static EventSurface sTouchSurface;

static TouchWindow sTouchWindow;

static void gesture_hold_begin(void* data,

                               struct zwp_pointer_gesture_hold_v1* hold,

                               uint32_t serial, uint32_t time,

                               struct wl_surface* surface, uint32_t fingers) {

  sTouchSurface.Set(surface);

  RefPtr<nsWindow> window = sTouchSurface.GetWindow();

  RefPtr<nsWindow> window = sTouchWindow.TakeWindow(surface);

  if (!window) {

    return;

  }

                             struct zwp_pointer_gesture_hold_v1* hold,

                             uint32_t serial, uint32_t time,

                             int32_t cancelled) {

  RefPtr<nsWindow> window = sTouchSurface.GetWindow();

  RefPtr<nsWindow> window = sTouchWindow.GetAndClearWindow();

  if (!window) {

    return;

  }