vim-patch:7.4.502 #2282

Problem:    Language mapping also applies to mapped characters.
Solution:   Add the 'langnoremap' option, when on 'langmap' does not apply to
            mapped characters. (Christian Brabandt)

https://github.com/vim/vim/releases/tag/v7-4-502

src/nvim/macros.h

@@ -77,12 +77,17 @@
  * Adjust chars in a language according to 'langmap' option.
  * NOTE that there is no noticeable overhead if 'langmap' is not set.
  * When set the overhead for characters < 256 is small.
- * Don't apply 'langmap' if the character comes from the Stuff buffer.
+ * Don't apply 'langmap' if the character comes from the Stuff buffer or from a
+ * mapping and the langnoremap option was set.
  * The do-while is just to ignore a ';' after the macro.
  */
 #  define LANGMAP_ADJUST(c, condition) \
   do { \
-    if (*p_langmap && (condition) && !KeyStuffed && (c) >= 0) \
+    if (*p_langmap \
+        && (condition) \
+        && (!p_lnr || (p_lnr && typebuf_maplen() == 0)) \
+        && !KeyStuffed \
+        && (c) >= 0) \
     { \
       if ((c) < 256) \
         c = langmap_mapchar[c]; \

src/nvim/option.c

@@ -1027,6 +1027,9 @@ static vimoption_T
   {"langmenu",    "lm",   P_STRING|P_VI_DEF|P_NFNAME,
    (char_u *)&p_lm, PV_NONE,
    {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
+  {"langnoremap", "lnr",  P_BOOL|P_VI_DEF,
+   (char_u *)&p_lnr, PV_NONE,
+   {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
   {"laststatus",  "ls",   P_NUM|P_VI_DEF|P_RALL,
    (char_u *)&p_ls, PV_NONE,
    {(char_u *)1L, (char_u *)0L} SCRIPTID_INIT},

src/nvim/option_defs.h

@@ -432,6 +432,7 @@ EXTERN int p_js;                /* 'joinspaces' */
 EXTERN char_u   *p_kp;          /* 'keywordprg' */
 EXTERN char_u   *p_km;          /* 'keymodel' */
 EXTERN char_u   *p_langmap;     /* 'langmap'*/
+EXTERN int p_lnr;               /* 'langnoremap'*/
 EXTERN char_u   *p_lm;          /* 'langmenu' */
 EXTERN char_u   *p_lispwords;   /* 'lispwords' */
 EXTERN long p_ls;               /* 'laststatus' */

src/nvim/version.c

@@ -238,7 +238,7 @@ static int included_patches[] = {
   //505 NA
   //504 NA
   503,
-  //502,
+  502,
   //501 NA
   500,
   499,