wayland: support wl_data_device_manager version < 3

src/video/wayland/SDL_waylanddyn.h

@@ -74,6 +74,7 @@ void SDL_WAYLAND_UnloadSymbols(void);
 #define wl_proxy_marshal (*WAYLAND_wl_proxy_marshal)
 #define wl_proxy_set_user_data (*WAYLAND_wl_proxy_set_user_data)
 #define wl_proxy_get_user_data (*WAYLAND_wl_proxy_get_user_data)
+#define wl_proxy_get_version (*WAYLAND_wl_proxy_get_version)
 #define wl_proxy_add_listener (*WAYLAND_wl_proxy_add_listener)
 #define wl_proxy_marshal_constructor (*WAYLAND_wl_proxy_marshal_constructor)
 #define wl_proxy_marshal_constructor_versioned (*WAYLAND_wl_proxy_marshal_constructor_versioned)

src/video/wayland/SDL_waylandevents.c

@@ -809,8 +809,10 @@ data_device_handle_enter(void *data, struct wl_data_device *wl_data_device,
         if (has_mime == SDL_TRUE) {
             dnd_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY;
         }
-        wl_data_offer_set_actions(data_device->drag_offer->offer,
-                                  dnd_action, dnd_action);
+        if (wl_data_offer_get_version(data_device->drag_offer->offer) >= 3) {
+            wl_data_offer_set_actions(data_device->drag_offer->offer,
+                                      dnd_action, dnd_action);
+        }
     }
 }
 

src/video/wayland/SDL_waylandsym.h

@@ -40,6 +40,7 @@ SDL_WAYLAND_SYM(void, wl_proxy_destroy, (struct wl_proxy *))
 SDL_WAYLAND_SYM(int, wl_proxy_add_listener, (struct wl_proxy *, void (**)(void), void *))
 SDL_WAYLAND_SYM(void, wl_proxy_set_user_data, (struct wl_proxy *, void *))
 SDL_WAYLAND_SYM(void *, wl_proxy_get_user_data, (struct wl_proxy *))
+SDL_WAYLAND_SYM(uint32_t, wl_proxy_get_version, (struct wl_proxy *))
 SDL_WAYLAND_SYM(uint32_t, wl_proxy_get_id, (struct wl_proxy *))
 SDL_WAYLAND_SYM(const char *, wl_proxy_get_class, (struct wl_proxy *))
 SDL_WAYLAND_SYM(void, wl_proxy_set_queue, (struct wl_proxy *, struct wl_event_queue *))

src/video/wayland/SDL_waylandvideo.c

@@ -381,7 +381,7 @@ display_handle_global(void *data, struct wl_registry *registry, uint32_t id,
     } else if (strcmp(interface, "zwp_pointer_constraints_v1") == 0) {
         Wayland_display_add_pointer_constraints(d, id);
     } else if (strcmp(interface, "wl_data_device_manager") == 0) {
-        d->data_device_manager = wl_registry_bind(d->registry, id, &wl_data_device_manager_interface, 3);
+        d->data_device_manager = wl_registry_bind(d->registry, id, &wl_data_device_manager_interface, SDL_min(3, version));
     } else if (strcmp(interface, "zxdg_decoration_manager_v1") == 0) {
         d->decoration_manager = wl_registry_bind(d->registry, id, &zxdg_decoration_manager_v1_interface, 1);
     } else if (strcmp(interface, "org_kde_kwin_server_decoration_manager") == 0) {