Fix particle system duplication duplicates all systems

Followup to rB3834dc2f7b38 (where getting the proper particle system was
fixed for the Adjust Last Operation panel in the Properties Editor). But
since this operator can also be called from the 3DView, get a current
particle system there as well.

Without this, _all_ particle systems would be copied when executing from
the 3DView (which was never really intended [operator description uses
singular] -- it just happens to use `copy_particle_systems_to_object`
internally as well -- same as the `Copy Active/All to Selected Objects`
operators)).

ref. T83317

Maniphest Tasks: T83317

Differential Revision: https://developer.blender.org/D12033

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/editors/physics/particle_object.c b/source/blender/editors/physics/particle_object.c
index 387d10d538b..2668846284d 100644
--- a/source/blender/editors/physics/particle_object.c
+++ b/source/blender/editors/physics/particle_object.c
@@ -1331,7 +1331,12 @@ static int duplicate_particle_systems_exec(bContext *C, wmOperator *op)
   const bool duplicate_settings = RNA_boolean_get(op->ptr, "use_duplicate_settings");
   Scene *scene = CTX_data_scene(C);
   Object *ob = ED_object_active_context(C);
+  /* Context pointer is only valid in the Properties Editor. */
   ParticleSystem *psys = CTX_data_pointer_get_type(C, "particle_system", &RNA_ParticleSystem).data;
+  if (psys == NULL) {
+    psys = psys_get_current(ob);
+  }
+
   copy_particle_systems_to_object(
       C, scene, ob, psys, ob, PAR_COPY_SPACE_OBJECT, duplicate_settings);
   return OPERATOR_FINISHED;