current_doc_must_undo(): check for undo-necessity when operating on the current document

if the current document is a local q-register from a macro call,
we must not generate undo tokens, since the local documents
are discarded on macro termination.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/ring.h b/src/ring.h
index db64882..be2689e 100644
--- a/src/ring.h
+++ b/src/ring.h
@@ -247,4 +247,11 @@ current_doc_update(void)
 		QRegisters::current->update_string();
 }
 
+static inline bool
+current_doc_must_undo(void)
+{
+	return ring.current ||
+	       QRegisters::current->must_undo;
+}
+
 #endif