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/include/ED_view3d.h b/source/blender/editors/include/ED_view3d.h
index 931bb7be8bf..7d31950c869 100644
--- a/source/blender/editors/include/ED_view3d.h
+++ b/source/blender/editors/include/ED_view3d.h
@@ -1197,6 +1197,14 @@ bool ED_view3d_camera_lock_autokey(struct View3D *v3d,
 void ED_view3d_lock_clear(struct View3D *v3d);
 
 /**
+ * Check if creating an undo step should be performed if the viewport moves.
+ * \return true if #ED_view3d_camera_lock_undo_push would do an undo push.
+ */
+bool ED_view3d_camera_lock_undo_test(const View3D *v3d,
+                                     const RegionView3D *rv3d,
+                                     struct bContext *C);
+
+/**
  * Create an undo step when the camera is locked to the view.
  * \param str: The name of the undo step (typically #wmOperatorType.name should be used).
  *