Save undo records for newline insertions.

 That makes mg behave more like GNU emacs.

3 files changed, 32 insertions, 3 deletions

diff --git a/usr.bin/mg/def.h b/usr.bin/mg/def.h
index b4a49d18490..1e7847ea942 100644
--- a/usr.bin/mg/def.h
+++ b/usr.bin/mg/def.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: def.h,v 1.32 2002/02/21 04:16:27 vincent Exp $	*/
+/*	$OpenBSD: def.h,v 1.33 2002/02/21 04:21:05 vincent Exp $	*/
 
 #include <sys/queue.h>
 
@@ -574,6 +574,7 @@ int	 cntnonmatchlines(int, int);
 /* undo.c X */
 int	 undo_init(void);
 int	 undo_enable(int);
+int	 undo_add_custom(int, LINE *, int, void *, int);
 int	 undo_add_boundary(void);
 int	 undo_add_insert(LINE *, int, int);
 int	 undo_add_delete(LINE *, int, int);
diff --git a/usr.bin/mg/line.c b/usr.bin/mg/line.c
index d88f60bef0f..02fa4c4b5b8 100644
--- a/usr.bin/mg/line.c
+++ b/usr.bin/mg/line.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: line.c,v 1.13 2002/02/20 22:30:54 vincent Exp $	*/
+/*	$OpenBSD: line.c,v 1.14 2002/02/21 04:21:05 vincent Exp $	*/
 
 /*
  *		Text line handling.
@@ -248,6 +248,13 @@ lnewline()
 
 	lchange(WFHARD);
 
+	if (!undoaction) {
+		/* XXX */
+		undo_add_custom(INSERT, curwp->w_dotp, curwp->w_doto,
+		    strdup("\n"), 1);
+	}
+
+
 	/* Get the address and offset of "." */
 	lp1 = curwp->w_dotp;
 	doto = curwp->w_doto;
diff --git a/usr.bin/mg/undo.c b/usr.bin/mg/undo.c
index 1866d7432d5..2dbe5a5dbc3 100644
--- a/usr.bin/mg/undo.c
+++ b/usr.bin/mg/undo.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: undo.c,v 1.4 2002/02/21 04:16:27 vincent Exp $ */
+/* $OpenBSD: undo.c,v 1.5 2002/02/21 04:21:05 vincent Exp $ */
 /*
  * Copyright (c) 2002 Vincent Labrecque <vincent@openbsd.org>
  *							 All rights reserved.
@@ -187,6 +187,27 @@ undo_enable(int on)
 }
 
 int
+undo_add_custom(int type, LINE *lp, int offset, void *content, int size)
+{
+	struct undo_rec *rec;
+
+	if (undo_disable_flag)
+		return TRUE;
+	rec = new_undo_record();
+	rec->pos = find_offset(lp, offset);
+	rec->buf = curbp;
+	rec->type = type;
+	rec->content = content;
+	rec->region.r_linep = lp;
+	rec->region.r_offset = offset;
+	rec->region.r_size = size;
+
+	LIST_INSERT_HEAD(&undo_list, rec, next);
+	
+	return TRUE;
+}
+
+int
 undo_add_boundary(void)
 {
 	struct undo_rec *rec;