Asset Browser: Allow World assets to be drag/dropped onto the viewport

While World data has always been able to be marked as an asset, there
was no way to actually use them from the asset browser. This change
allows users to drag-drop world assets onto the Viewport and have them
appended/linked to their scene.

Differential Revision: https://developer.blender.org/D12566

1 files changed, 54 insertions, 0 deletions

diff --git a/source/blender/editors/space_view3d/view3d_edit.c b/source/blender/editors/space_view3d/view3d_edit.c
index d917674194a..15ccf5891d4 100644
--- a/source/blender/editors/space_view3d/view3d_edit.c
+++ b/source/blender/editors/space_view3d/view3d_edit.c
@@ -34,6 +34,7 @@
 #include "DNA_gpencil_types.h"
 #include "DNA_object_types.h"
 #include "DNA_scene_types.h"
+#include "DNA_world_types.h"
 
 #include "MEM_guardedalloc.h"
 
@@ -4874,6 +4875,59 @@ void VIEW3D_OT_background_image_remove(wmOperatorType *ot)
 /** \} */
 
 /* -------------------------------------------------------------------- */
+/** \name Drop World Operator
+ * \{ */
+
+static int drop_world_exec(bContext *C, wmOperator *op)
+{
+  Main *bmain = CTX_data_main(C);
+  Scene *scene = CTX_data_scene(C);
+
+  char name[MAX_ID_NAME - 2];
+
+  RNA_string_get(op->ptr, "name", name);
+  World *world = (World *)BKE_libblock_find_name(bmain, ID_WO, name);
+  if (world == NULL) {
+    return OPERATOR_CANCELLED;
+  }
+
+  id_us_plus(&world->id);
+  scene->world = world;
+
+  DEG_id_tag_update(&scene->id, 0);
+  DEG_relations_tag_update(bmain);
+
+  WM_event_add_notifier(C, NC_SCENE | ND_WORLD, scene);
+
+  return OPERATOR_FINISHED;
+}
+
+static bool drop_world_poll(bContext *C)
+{
+  return ED_operator_scene_editable(C);
+}
+
+void VIEW3D_OT_drop_world(wmOperatorType *ot)
+{
+  /* identifiers */
+  ot->name = "Drop World";
+  ot->description = "Drop a world into the scene";
+  ot->idname = "VIEW3D_OT_drop_world";
+
+  /* api callbacks */
+  ot->exec = drop_world_exec;
+  ot->poll = drop_world_poll;
+
+  /* flags */
+  ot->flag = OPTYPE_UNDO | OPTYPE_INTERNAL;
+
+  /* properties */
+  RNA_def_string(ot->srna, "name", "World", MAX_ID_NAME - 2, "Name", "World to assign");
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
 /** \name View Clipping Planes Operator
  *
  * Draw border or toggle off.