If the terminal supports sitm for italics, use it instead of standout

(smso). From Tiago Resende.

3 files changed, 8 insertions, 1 deletions

diff --git a/tmux.h b/tmux.h
index 12f68085..36dcf273 100644
--- a/tmux.h
+++ b/tmux.h
@@ -323,6 +323,7 @@ enum tty_code_code {
 	TTYC_SMKX,	/* keypad_xmit, ks */
 	TTYC_SMSO,	/* enter_standout_mode, so */
 	TTYC_SMUL,	/* enter_underline_mode, us */
+	TTYC_SITM,	/* enter_italics_mode, it */
 	TTYC_VPA,	/* row_address, cv */
 	TTYC_XENL,	/* eat_newline_glitch, xn */
 };
diff --git a/tty-term.c b/tty-term.c
index 943f1e4d..59a1bbba 100644
--- a/tty-term.c
+++ b/tty-term.c
@@ -178,6 +178,7 @@ const struct tty_term_code_entry tty_term_codes[NTTYCODE] = {
 	{ TTYC_SMKX, TTYCODE_STRING, "smkx" },
 	{ TTYC_SMSO, TTYCODE_STRING, "smso" },
 	{ TTYC_SMUL, TTYCODE_STRING, "smul" },
+	{ TTYC_SITM, TTYCODE_STRING, "sitm" },
 	{ TTYC_VPA, TTYCODE_STRING, "vpa" },
 	{ TTYC_XENL, TTYCODE_FLAG, "xenl" },
 };
diff --git a/tty.c b/tty.c
index bffb1f93..73dff0be 100644
--- a/tty.c
+++ b/tty.c
@@ -1218,7 +1218,12 @@ tty_attributes(struct tty *tty, const struct grid_cell *gc)
 	if (changed & GRID_ATTR_DIM)
 		tty_putcode(tty, TTYC_DIM);
 	if (changed & GRID_ATTR_ITALICS)
-		tty_putcode(tty, TTYC_SMSO);
+	{
+		if (tty_term_has(tty->term, TTYC_SITM))
+			tty_putcode(tty, TTYC_SITM);
+		else
+			tty_putcode(tty, TTYC_SMSO);
+	}
 	if (changed & GRID_ATTR_UNDERSCORE)
 		tty_putcode(tty, TTYC_SMUL);
 	if (changed & GRID_ATTR_BLINK)