Fix missing undo steps for smooth-view operators

Support pushing undo steps for smooth-view operations that manipulate
the camera. Now V3D_SmoothParams take optional undo arguments.

Used for:

- VIEW3D_OT_view_center_cursor
- VIEW3D_OT_view_center_pick
- VIEW3D_OT_view_orbit
- VIEW3D_OT_view_roll
- VIEW3D_OT_zoom_border

Follow up fix for T92099.

1 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/editors/space_view3d/view3d_view.c b/source/blender/editors/space_view3d/view3d_view.c
index fc88737ca70..b8042a9f215 100644
--- a/source/blender/editors/space_view3d/view3d_view.c
+++ b/source/blender/editors/space_view3d/view3d_view.c
@@ -202,6 +202,8 @@ static void sync_viewport_camera_smoothview(bContext *C,
                                               .quat = other_rv3d->viewquat,
                                               .dist = &other_rv3d->dist,
                                               .lens = &other_v3d->lens,
+                                              /* No undo because this switches cameras. */
+                                              .undo_str = NULL,
                                           });
                   }
                   else {
@@ -256,6 +258,8 @@ static int view3d_setobjectascamera_exec(bContext *C, wmOperator *op)
                                 .quat = rv3d->viewquat,
                                 .dist = &rv3d->dist,
                                 .lens = &v3d->lens,
+                                /* No undo because this switches cameras. */
+                                .undo_str = NULL,
                             });
     }
 
@@ -939,6 +943,8 @@ static bool view3d_localview_init(const Depsgraph *depsgraph,
                                      .quat = rv3d->viewquat,
                                      .dist = ok_dist ? &dist_new : NULL,
                                      .lens = &v3d->lens,
+                                     /* No undo because this doesn't move the camera. */
+                                     .undo_str = NULL,
                                  });
       }
     }
@@ -1008,6 +1014,8 @@ static void view3d_localview_exit(const Depsgraph *depsgraph,
                                      .ofs = rv3d->localvd->ofs,
                                      .quat = rv3d->localvd->viewquat,
                                      .dist = &rv3d->localvd->dist,
+                                     /* No undo because this doesn't move the camera. */
+                                     .undo_str = NULL,
                                  });
       }