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Add support for applications to use synchronized output mode (DECSET

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2026) to prevent screen tearing during rapid updates. When an
application sends SM ?2026, tmux buffers output until RM ?2026 is received
or a 1-second timeout expires.

From Chris Lloyd with the assistance of Claude Code, GitHub issue 4744.
This commit is contained in:
nicm
2025-12-17 11:49:29 +00:00
parent ce7eb22e3a
commit 1c7e164c22
7 changed files with 87 additions and 1 deletions
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4
window.c
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@@ -990,6 +990,8 @@ window_pane_destroy(struct window_pane *wp)
if (event_initialized(&wp->resize_timer))
event_del(&wp->resize_timer);
if (event_initialized(&wp->sync_timer))
event_del(&wp->sync_timer);
TAILQ_FOREACH_SAFE(r, &wp->resize_queue, entry, r1) {
TAILQ_REMOVE(&wp->resize_queue, r, entry);
free(r);
@@ -1069,6 +1071,8 @@ window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
if (sx == wp->sx && sy == wp->sy)
return;
screen_write_stop_sync(wp);
r = xmalloc(sizeof *r);
r->sx = sx;
r->sy = sy;