From 907fc8ac373226556b84c2fdc4fe26525bbdb2c4 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Tue, 13 Sep 2022 06:23:33 +0800
Subject: vim-patch:9.0.0449: there is no easy way to translate a key code into
 a string (#20168)

Problem:    There is no easy way to translate a string with a key code into a
            readable string.
Solution:   Add the keytrans() function. (closes vim/vim#11114)
https://github.com/vim/vim/commit/cdc839353f68ca43db6446e1b727fc7ba657b738

vim-patch:7b2d87220c6c

Add missing part of patch
https://github.com/vim/vim/commit/7b2d87220c6c974d5cdae672b6f9620a6bcbd1dc
---
 src/nvim/eval/funcs.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/nvim/eval')

diff --git a/src/nvim/eval/funcs.c b/src/nvim/eval/funcs.c
index 3c08acc10b..b5ae24953f 100644
--- a/src/nvim/eval/funcs.c
+++ b/src/nvim/eval/funcs.c
@@ -4673,6 +4673,20 @@ static void f_json_encode(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
   rettv->vval.v_string = encode_tv2json(&argvars[0], NULL);
 }
 
+/// "keytrans()" function
+static void f_keytrans(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
+{
+  rettv->v_type = VAR_STRING;
+  if (tv_check_for_string_arg(argvars, 0) == FAIL
+      || argvars[0].vval.v_string == NULL) {
+    return;
+  }
+  // Need to escape K_SPECIAL for mb_unescape().
+  char *escaped = vim_strsave_escape_ks(argvars[0].vval.v_string);
+  rettv->vval.v_string = str2special_save(escaped, true, true);
+  xfree(escaped);
+}
+
 /// "last_buffer_nr()" function.
 static void f_last_buffer_nr(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
 {
-- 
cgit