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.

---
 input.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

(limited to 'input.c')

diff --git a/input.c b/input.c
index 03b81c69..44b1b948 100644
--- a/input.c
+++ b/input.c
@@ -241,6 +241,8 @@ enum input_csi_type {
 	INPUT_CSI_HPA,
 	INPUT_CSI_ICH,
 	INPUT_CSI_IL,
+	INPUT_CSI_MODOFF,
+	INPUT_CSI_MODSET,
 	INPUT_CSI_RCP,
 	INPUT_CSI_REP,
 	INPUT_CSI_RM,
@@ -289,7 +291,9 @@ static const struct input_table_entry input_csi_table[] = {
 	{ 'l', "",  INPUT_CSI_RM },
 	{ 'l', "?", INPUT_CSI_RM_PRIVATE },
 	{ 'm', "",  INPUT_CSI_SGR },
+	{ 'm', ">", INPUT_CSI_MODSET },
 	{ 'n', "",  INPUT_CSI_DSR },
+	{ 'n', ">", INPUT_CSI_MODOFF },
 	{ 'q', " ", INPUT_CSI_DECSCUSR },
 	{ 'q', ">", INPUT_CSI_XDA },
 	{ 'r', "",  INPUT_CSI_DECSTBM },
@@ -1380,6 +1384,19 @@ input_csi_dispatch(struct input_ctx *ictx)
 		if (n != -1 && m != -1)
 			screen_write_cursormove(sctx, m - 1, n - 1, 1);
 		break;
+	case INPUT_CSI_MODSET:
+		n = input_get(ictx, 0, 0, 0);
+		m = input_get(ictx, 1, 0, 0);
+		if (n == 0 || (n == 4 && m == 0))
+			screen_write_mode_clear(sctx, MODE_KEXTENDED);
+		else if (n == 4 && (m == 1 || m == 2))
+			screen_write_mode_set(sctx, MODE_KEXTENDED);
+		break;
+	case INPUT_CSI_MODOFF:
+		n = input_get(ictx, 0, 0, 0);
+		if (n == 4)
+			screen_write_mode_clear(sctx, MODE_KEXTENDED);
+		break;
 	case INPUT_CSI_WINOPS:
 		input_csi_dispatch_winops(ictx);
 		break;
@@ -1593,7 +1610,7 @@ input_csi_dispatch(struct input_ctx *ictx)
 		break;
 	case INPUT_CSI_XDA:
 		n = input_get(ictx, 0, 0, 0);
-		if (n != 0)
+		if (n == 0)
 			input_reply(ictx, "\033P>|tmux %s\033\\", getversion());
 		break;
 
-- 
cgit