From a00b0d13ede4a0f3743606c79a38eada403f77f9 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Wed, 28 Jun 2017 11:36:39 +0000
Subject: [PATCH] Apply the xterm key flag when needed for send-keys, fixes
 problem reported by Franky Spamschleuder.

---
 cmd-send-keys.c | 2 ++
 input-keys.c    | 2 +-
 tmux.h          | 4 ++--
 window.c        | 2 +-
 4 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/cmd-send-keys.c b/cmd-send-keys.c
index 5c6db347..8d2c2608 100644
--- a/cmd-send-keys.c
+++ b/cmd-send-keys.c
@@ -64,6 +64,8 @@ cmd_send_keys_inject(struct client *c, struct cmdq_item *item, key_code key)
 	struct key_binding	*bd, bd_find;
 
 	if (wp->mode == NULL || wp->mode->key_table == NULL) {
+		if (options_get_number(wp->window->options, "xterm-keys"))
+			key |= KEYC_XTERM;
 		window_pane_key(wp, NULL, s, key, NULL);
 		return;
 	}
diff --git a/input-keys.c b/input-keys.c
index c0314db4..34710dac 100644
--- a/input-keys.c
+++ b/input-keys.c
@@ -177,7 +177,7 @@ input_key(struct window_pane *wp, key_code key, struct mouse_event *m)
 	 * If this is a normal 7-bit key, just send it, with a leading escape
 	 * if necessary. If it is a UTF-8 key, split it and send it.
 	 */
-	justkey = (key & ~KEYC_ESCAPE);
+	justkey = (key & ~(KEYC_XTERM|KEYC_ESCAPE));
 	if (justkey <= 0x7f) {
 		if (key & KEYC_ESCAPE)
 			bufferevent_write(wp->event, "\033", 1);
diff --git a/tmux.h b/tmux.h
index ef68c66b..2fdccd2a 100644
--- a/tmux.h
+++ b/tmux.h
@@ -94,8 +94,8 @@ struct tmuxproc;
 
 /* Key modifier bits. */
 #define KEYC_ESCAPE 0x200000000000ULL
-#define KEYC_CTRL   0x400000000000ULL
-#define KEYC_SHIFT  0x800000000000ULL
+#define KEYC_CTRL 0x400000000000ULL
+#define KEYC_SHIFT 0x800000000000ULL
 #define KEYC_XTERM 0x1000000000000ULL
 
 /* Mask to obtain key w/o modifiers. */
diff --git a/window.c b/window.c
index 4b59f205..ce5166c8 100644
--- a/window.c
+++ b/window.c
@@ -1226,7 +1226,7 @@ window_pane_key(struct window_pane *wp, struct client *c, struct session *s,
 	if (wp->mode != NULL) {
 		wp->modelast = time(NULL);
 		if (wp->mode->key != NULL)
-			wp->mode->key(wp, c, s, key, m);
+			wp->mode->key(wp, c, s, (key & ~KEYC_XTERM), m);
 		return;
 	}