From 0ab82d95314e7a26a48452c77ad710f3aff97dd7 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Sat, 16 May 2020 16:44:54 +0000
Subject: Add a terminal feature for enable/disable extended keys (supported by
 xterm and mintty) and add an option to make tmux send it. Only forward
 extended keys if the application has requested them, even though we use the
 CSI u sequence and xterm uses CSI 27 ~ - this is what mintty does as well.

---
 tty-features.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

(limited to 'tty-features.c')

diff --git a/tty-features.c b/tty-features.c
index 30d3d1a0..26344b90 100644
--- a/tty-features.c
+++ b/tty-features.c
@@ -190,6 +190,18 @@ static const struct tty_feature tty_feature_sync = {
 	0
 };
 
+/* Terminal supports extended keys. */
+static const char *tty_feature_extkeys_capabilities[] = {
+	"Eneks=\\E[>4;1m",
+	"Dseks=\\E[>4m",
+	NULL
+};
+static const struct tty_feature tty_feature_extkeys = {
+	"extkeys",
+	tty_feature_extkeys_capabilities,
+	0
+};
+
 /* Terminal supports DECSLRM margins. */
 static const char *tty_feature_margins_capabilities[] = {
 	"Enmg=\\E[?69h",
@@ -218,6 +230,7 @@ static const struct tty_feature *tty_features[] = {
 	&tty_feature_ccolour,
 	&tty_feature_clipboard,
 	&tty_feature_cstyle,
+	&tty_feature_extkeys,
 	&tty_feature_focus,
 	&tty_feature_margins,
 	&tty_feature_overline,
@@ -321,7 +334,7 @@ tty_default_features(int *feat, const char *name, u_int version)
 	} table[] = {
 #define TTY_FEATURES_BASE_MODERN_XTERM "256,RGB,bpaste,clipboard,strikethrough,title"
 		{ .name = "mintty",
-		  .features = TTY_FEATURES_BASE_MODERN_XTERM ",ccolour,cstyle,margins,overline"
+		  .features = TTY_FEATURES_BASE_MODERN_XTERM ",ccolour,cstyle,extkeys,margins,overline"
 		},
 		{ .name = "tmux",
 		  .features = TTY_FEATURES_BASE_MODERN_XTERM ",ccolour,cstyle,focus,overline,usstyle"
@@ -333,7 +346,7 @@ tty_default_features(int *feat, const char *name, u_int version)
 		  .features = TTY_FEATURES_BASE_MODERN_XTERM ",cstyle,margins,sync"
 		},
 		{ .name = "XTerm",
-		  .features = TTY_FEATURES_BASE_MODERN_XTERM ",ccolour,cstyle,focus,margins,rectfill"
+		  .features = TTY_FEATURES_BASE_MODERN_XTERM ",ccolour,cstyle,extkeys,focus,margins,rectfill"
 		}
 	};
 	u_int	i;
-- 
cgit