From 69e0b8326ad0a983759518b90ed8632146341acf Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Thu, 12 Nov 2015 11:05:34 +0000
Subject: Support UTF-8 key bindings by expanding the key type from int to
 uint64_t and converting UTF-8 to Unicode on input and the reverse on output.
 (This allows key bindings, there are still omissions - the largest being that
 the various prompts do not accept UTF-8.)

---
 input-keys.c | 38 ++++++++++++++++++++++++--------------
 1 file changed, 24 insertions(+), 14 deletions(-)

(limited to 'input-keys.c')

diff --git a/input-keys.c b/input-keys.c
index 579c0f39..a761a088 100644
--- a/input-keys.c
+++ b/input-keys.c
@@ -34,7 +34,7 @@
 void	 input_key_mouse(struct window_pane *, struct mouse_event *);
 
 struct input_key_ent {
-	int		 key;
+	key_code	 key;
 	const char	*data;
 
 	int		 flags;
@@ -137,15 +137,16 @@ const struct input_key_ent input_keys[] = {
 
 /* Translate a key code into an output key sequence. */
 void
-input_key(struct window_pane *wp, int key, struct mouse_event *m)
+input_key(struct window_pane *wp, key_code key, struct mouse_event *m)
 {
-	const struct input_key_ent     *ike;
-	u_int				i;
-	size_t				dlen;
-	char			       *out;
-	u_char				ch;
+	const struct input_key_ent	*ike;
+	u_int				 i;
+	size_t				 dlen;
+	char				*out;
+	key_code			 justkey;
+	struct utf8_data		 utf8data;
 
-	log_debug("writing key 0x%x (%s) to %%%u", key,
+	log_debug("writing key 0x%llx (%s) to %%%u", key,
 	    key_string_lookup_key(key), wp->id);
 
 	/* If this is a mouse key, pass off to mouse function. */
@@ -157,13 +158,22 @@ input_key(struct window_pane *wp, int key, struct mouse_event *m)
 
 	/*
 	 * If this is a normal 7-bit key, just send it, with a leading escape
-	 * if necessary.
+	 * if necessary. If it is a UTF-8 key, split it and send it.
 	 */
-	if (key != KEYC_NONE && (key & ~KEYC_ESCAPE) < 0x100) {
+	justkey = (key & ~KEYC_ESCAPE);
+	if (key != KEYC_NONE && justkey < 0x7f) {
 		if (key & KEYC_ESCAPE)
 			bufferevent_write(wp->event, "\033", 1);
-		ch = key & ~KEYC_ESCAPE;
-		bufferevent_write(wp->event, &ch, 1);
+		utf8data.data[0] = justkey;
+		bufferevent_write(wp->event, &utf8data.data[0], 1);
+		return;
+	}
+	if (key != KEYC_NONE && justkey > 0x7f && justkey < KEYC_BASE) {
+		if (utf8_split(justkey, &utf8data) != 0)
+			return;
+		if (key & KEYC_ESCAPE)
+			bufferevent_write(wp->event, "\033", 1);
+		bufferevent_write(wp->event, utf8data.data, utf8data.size);
 		return;
 	}
 
@@ -196,11 +206,11 @@ input_key(struct window_pane *wp, int key, struct mouse_event *m)
 			break;
 	}
 	if (i == nitems(input_keys)) {
-		log_debug("key 0x%x missing", key);
+		log_debug("key 0x%llx missing", key);
 		return;
 	}
 	dlen = strlen(ike->data);
-	log_debug("found key 0x%x: \"%s\"", key, ike->data);
+	log_debug("found key 0x%llx: \"%s\"", key, ike->data);
 
 	/* Prefix a \033 for escape. */
 	if (key & KEYC_ESCAPE)
-- 
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