ed

commit 79a170f6ff4b1881d49041e6b3dc2ebcaeef5ac0
parent efdd117f3bb0557332357dc4faffa1a35dee7f0a
Author: Curtis Arthaud <uku82@gmx.fr>
Date:   Wed, 20 Mar 2024 13:09:08 +0100

history: keep cursor within bounds

Signed-off-by: Curtis Arthaud <uku82@gmx.fr>

Diffstat:
M
history.ha
 | 
8
+++++++-

1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/history.ha b/history.ha
@@ -65,11 +65,14 @@ fn hist_undo(buf: *Buffer) (void | NoHistory) = {
 			let lines = buf.trash[(lentrash - m)..];
 			insert(buf.lines[n], lines...);
 			delete(buf.trash[(lentrash - m)..]);
+			buf.cursor = (n + m) - 1;
 		case let addn: Addition =>
 			let (n, m) = addn;
 			let lines = buf.lines[n..(n + m)];
 			insert(buf.trash[0], lines...);
 			delete(buf.lines[n..(n + m)]);
+			let prev = addr_prevline(buf, n);
+			buf.cursor = prev;
 		};
 };
 
@@ -84,16 +87,19 @@ fn hist_redo(buf: *Buffer) (void | NoHistory) = {
 		match (seq[i]) {
 		case let addn: Addition =>
 			let (n, m) = addn;
-			let lentrash = len(buf.trash);
+			//let lentrash = len(buf.trash);
 			//let lines = buf.trash[(lentrash - m)..];
 			let lines = buf.trash[..m];
 			insert(buf.lines[n], lines...);
 			//delete(buf.trash[(lentrash - m)..]);
 			delete(buf.trash[..m]);
+			buf.cursor = (n + m) - 1;
 		case let deln: Deletion =>
 			let (n, m) = deln;
 			let lines = buf.lines[n..(n + m)];
 			append(buf.trash, lines...);
 			delete(buf.lines[n..(n + m)]);
+			let prev = addr_prevline(buf, n);
+			buf.cursor = prev;
 		};
 };