From 55c29e36dccddc7ae8c6512b6dec074437214097 Mon Sep 17 00:00:00 2001
From: Campbell Barton <ideasman42@gmail.com>
Date: Mon, 4 Feb 2019 15:01:55 +1100
Subject: Undo System: add function to print undo steps

Useful for debugging.
---
 source/blender/blenkernel/BKE_undo_system.h    |  2 ++
 source/blender/blenkernel/intern/undo_system.c | 24 ++++++++++++++++++++++++
 2 files changed, 26 insertions(+)

(limited to 'source/blender/blenkernel')

diff --git a/source/blender/blenkernel/BKE_undo_system.h b/source/blender/blenkernel/BKE_undo_system.h
index 5eac1b4f7a3..2b1c67f372b 100644
--- a/source/blender/blenkernel/BKE_undo_system.h
+++ b/source/blender/blenkernel/BKE_undo_system.h
@@ -200,4 +200,6 @@ void BKE_undosys_ID_map_foreach_ID_ref(
         struct UndoIDPtrMap *map,
         UndoTypeForEachIDRefFn foreach_ID_ref_fn, void *user_data);
 
+void BKE_undosys_print(UndoStack *ustack);
+
 #endif  /* __BKE_UNDO_SYSTEM_H__ */
diff --git a/source/blender/blenkernel/intern/undo_system.c b/source/blender/blenkernel/intern/undo_system.c
index 0969a3299b9..f56dd953283 100644
--- a/source/blender/blenkernel/intern/undo_system.c
+++ b/source/blender/blenkernel/intern/undo_system.c
@@ -1002,3 +1002,27 @@ ID *BKE_undosys_ID_map_lookup_with_prev(const UndoIDPtrMap *map, ID *id_src, ID
 }
 
 /** \} */
+
+
+/* -------------------------------------------------------------------- */
+/** \name Debug Helpers
+ * \{ */
+
+void BKE_undosys_print(UndoStack *ustack)
+{
+	printf("Undo %d Steps (A: active, M=memfile-active, S=skip)\n",
+	       BLI_listbase_count(&ustack->steps));
+	int index = 0;
+	for (UndoStep *us = ustack->steps.first; us; us = us->next) {
+		printf("[%c%c%c] %3d type='%s', name='%s'\n",
+		       (us == ustack->step_active) ? 'A' : '_',
+		       (us == ustack->step_active_memfile) ? 'M' : '_',
+		       us->skip ? 'S' : '_',
+		       index,
+		       us->type->name,
+		       us->name);
+		index++;
+	}
+}
+
+/** \} */
-- 
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