Geometry Nodes: Add legacy warning and "View Legacy" operator

This commit adds warning messages to "legacy" nodes that will be
removed in the future. The warning is shown in the node header, but
it is not printed in the terminal or displayed in the modifier. It is
also not propogated to node groups, but that is a more general task.

If the modifier's node tree has executed a deprecated node, it will
display a warning and a "Search" button that will select the nodes and
pan to them in the node editor. This doesn't open child node trees and
select nodes in there, because I want to keep this operator simple and
avoid wasting a lot of time perfecting this behavior.

Differential Revision: https://developer.blender.org/D12454

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/editors/space_node/node_intern.h b/source/blender/editors/space_node/node_intern.h
index d35fd729131..f069038cc09 100644
--- a/source/blender/editors/space_node/node_intern.h
+++ b/source/blender/editors/space_node/node_intern.h
@@ -175,6 +175,7 @@ int space_node_view_flag(struct bContext *C,
 
 void NODE_OT_view_all(struct wmOperatorType *ot);
 void NODE_OT_view_selected(struct wmOperatorType *ot);
+void NODE_OT_geometry_node_view_legacy(struct wmOperatorType *ot);
 
 void NODE_OT_backimage_move(struct wmOperatorType *ot);
 void NODE_OT_backimage_zoom(struct wmOperatorType *ot);