From fb4bcd8cfd17e88da4a72b807a83b2fc5304907a Mon Sep 17 00:00:00 2001
From: Benno Schulenberg <bensberg@telfort.nl>
Date: Thu, 5 Mar 2020 12:29:22 +0100
Subject: [PATCH] undo: store the cursor row, for redoing filtering &
 justification better

This fixes https://savannah.gnu.org/bugs/?57958.
---
 src/text.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/text.c b/src/text.c
index 0f6bb2cc..8d9e418d 100644
--- a/src/text.c
+++ b/src/text.c
@@ -620,6 +620,8 @@ void do_undo(void)
 		adjust_viewport(STATIONARY);
 		break;
 	case COUPLE_END:
+		/* Remember the row of the cursor for a possible redo. */
+		openfile->current_undo->head_lineno = openfile->current_y;
 		openfile->current_undo = openfile->current_undo->next;
 		do_undo();
 		do_undo();
@@ -780,6 +782,7 @@ void do_redo(void)
 	case COUPLE_END:
 		redidmsg = u->strdata;
 		goto_line_posx(u->tail_lineno, u->tail_x);
+		openfile->current_y = u->head_lineno;
 		adjust_viewport(STATIONARY);
 		break;
 	case INDENT: