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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
tmux.h
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@@ -643,6 +643,7 @@ enum tty_code_code {
#define MODE_CURSOR_BLINKING_SET 0x20000
#define MODE_KEYS_EXTENDED_2 0x40000
#define MODE_THEME_UPDATES 0x80000
#define MODE_SYNC 0x100000
#define ALL_MODES 0xffffff
#define ALL_MOUSE_MODES (MODE_MOUSE_STANDARD|MODE_MOUSE_BUTTON|MODE_MOUSE_ALL)
@@ -1190,6 +1191,7 @@ struct window_pane {
struct window_pane_resizes resize_queue;
struct event resize_timer;
struct event sync_timer;
struct input_ctx *ictx;
@@ -3099,6 +3101,8 @@ void screen_write_preview(struct screen_write_ctx *, struct screen *, u_int,
void screen_write_backspace(struct screen_write_ctx *);
void screen_write_mode_set(struct screen_write_ctx *, int);
void screen_write_mode_clear(struct screen_write_ctx *, int);
void screen_write_start_sync(struct window_pane *);
void screen_write_stop_sync(struct window_pane *);
void screen_write_cursorup(struct screen_write_ctx *, u_int);
void screen_write_cursordown(struct screen_write_ctx *, u_int);
void screen_write_cursorright(struct screen_write_ctx *, u_int);