Add support for the iTerm2 sychronized updates escape sequence which

drastically reduces flickering.

1 files changed, 26 insertions, 0 deletions

diff --git a/tty.c b/tty.c
index a7607cba..95c16fb8 100644
--- a/tty.c
+++ b/tty.c
@@ -1426,6 +1426,20 @@ tty_draw_line(struct tty *tty, struct window_pane *wp, struct screen *s,
 	tty_update_mode(tty, tty->mode, s);
 }
 
+void
+tty_sync_start(struct tty *tty)
+{
+	if ((tty->term->flags|tty->term_flags) & TERM_SYNC)
+		tty_puts(tty, "\033P=1s\033\\");
+}
+
+void
+tty_sync_end(struct tty *tty)
+{
+	if ((tty->term->flags|tty->term_flags) & TERM_SYNC)
+		tty_puts(tty, "\033P=2s\033\\");
+}
+
 static int
 tty_client_ready(struct client *c, struct window_pane *wp)
 {
@@ -1919,6 +1933,18 @@ tty_cmd_rawstring(struct tty *tty, const struct tty_ctx *ctx)
 	tty_invalidate(tty);
 }
 
+void
+tty_cmd_syncstart(struct tty *tty, __unused const struct tty_ctx *ctx)
+{
+	tty_sync_start(tty);
+}
+
+void
+tty_cmd_syncend(struct tty *tty, __unused const struct tty_ctx *ctx)
+{
+	tty_sync_end(tty);
+}
+
 static void
 tty_cell(struct tty *tty, const struct grid_cell *gc, struct window_pane *wp)
 {