revert: "refactor: Remove allow_keys global (#6346)"

src/nvim/digraph.c

@@ -1513,8 +1513,10 @@ char_u *get_digraph_for_char(int val_arg)
 int get_digraph(bool cmdline)
 {
   no_mapping++;
+  allow_keys++;
   int c = plain_vgetc();
   no_mapping--;
+  allow_keys--;
 
   if (c != ESC) {
     // ESC cancels CTRL-K
@@ -1531,8 +1533,10 @@ int get_digraph(bool cmdline)
       add_to_showcmd(c);
     }
     no_mapping++;
+    allow_keys++;
     int cc = plain_vgetc();
     no_mapping--;
+    allow_keys--;
 
     if (cc != ESC) {
       // ESC cancels CTRL-K

src/nvim/edit.c

@@ -762,8 +762,10 @@ static int insert_execute(VimState *state, int key)
     // may need to redraw when no more chars available now
     ins_redraw(false);
     no_mapping++;
+    allow_keys++;
     s->c = plain_vgetc();
     no_mapping--;
+    allow_keys--;
     if (s->c != Ctrl_N && s->c != Ctrl_G && s->c != Ctrl_O) {
       // it's something else
       vungetc(s->c);
@@ -9237,8 +9239,10 @@ static int ins_digraph(void)
   // don't map the digraph chars. This also prevents the
   // mode message to be deleted when ESC is hit
   no_mapping++;
+  allow_keys++;
   c = plain_vgetc();
   no_mapping--;
+  allow_keys--;
   if (did_putchar) {
     // when the line fits in 'columns' the '?' is at the start of the next
     // line and will not be removed by the redraw
@@ -9264,8 +9268,10 @@ static int ins_digraph(void)
       add_to_showcmd_c(c);
     }
     no_mapping++;
+    allow_keys++;
     cc = plain_vgetc();
     no_mapping--;
+    allow_keys--;
     if (did_putchar) {
       // when the line fits in 'columns' the '?' is at the start of the
       // next line and will not be removed by a redraw

src/nvim/eval/funcs.c

@@ -2975,6 +2975,7 @@ static void getchar_common(typval_T *argvars, typval_T *rettv)
   bool error = false;
 
   no_mapping++;
+  allow_keys++;
   for (;;) {
     // Position the cursor.  Needed after a message that ends in a space,
     // or if event processing caused a redraw.
@@ -3012,6 +3013,7 @@ static void getchar_common(typval_T *argvars, typval_T *rettv)
     break;
   }
   no_mapping--;
+  allow_keys--;
 
   set_vim_var_nr(VV_MOUSE_WIN, 0);
   set_vim_var_nr(VV_MOUSE_WINID, 0);

src/nvim/ex_cmds.c

@@ -3951,8 +3951,10 @@ static buf_T *do_sub(exarg_T *eap, proftime_T timeout, bool do_buf_event, handle
               RedrawingDisabled = temp;
 
               no_mapping++;                     // don't map this key
+              allow_keys++;                     // allow special keys
               typed = plain_vgetc();
               no_mapping--;
+              allow_keys--;
 
               // clear the question
               msg_didout = false;               // don't scroll up

src/nvim/ex_getln.c

@@ -1335,8 +1335,10 @@ static int command_line_execute(VimState *state, int key)
   // mode when 'insertmode' is set, CTRL-\ e prompts for an expression.
   if (s->c == Ctrl_BSL) {
     no_mapping++;
+    allow_keys++;
     s->c = plain_vgetc();
     no_mapping--;
+    allow_keys--;
     // CTRL-\ e doesn't work when obtaining an expression, unless it
     // is in a mapping.
     if (s->c != Ctrl_N

src/nvim/getchar.c

@@ -1511,19 +1511,24 @@ int vgetc(void)
       bool did_inc = false;
       if (mod_mask) {           // no mapping after modifier has been read
         no_mapping++;
+        allow_keys++;
         did_inc = true;         // mod_mask may change value
       }
       c = vgetorpeek(true);
       if (did_inc) {
         no_mapping--;
+        allow_keys--;
       }
 
       // Get two extra bytes for special keys
       if (c == K_SPECIAL) {
+        int save_allow_keys = allow_keys;
         no_mapping++;
+        allow_keys = 0;                 // make sure BS is not found
         c2 = vgetorpeek(true);          // no mapping for these chars
         c = vgetorpeek(true);
         no_mapping--;
+        allow_keys = save_allow_keys;
         if (c2 == KS_MODIFIER) {
           mod_mask = c;
           continue;

src/nvim/globals.h

@@ -652,6 +652,7 @@ EXTERN int reg_recorded INIT(= 0);      // last recorded register or zero
 
 EXTERN int no_mapping INIT(= false);    // currently no mapping allowed
 EXTERN int no_zero_mapping INIT(= 0);   // mapping zero not allowed
+EXTERN int allow_keys INIT(= false);    // allow key codes when no_mapping is set
 EXTERN int no_u_sync INIT(= 0);         // Don't call u_sync()
 EXTERN int u_sync_once INIT(= 0);       // Call u_sync() once when evaluating
                                         // an expression.

src/nvim/input.c

@@ -42,6 +42,7 @@ int ask_yesno(const char *const str, const bool direct)
   State = CONFIRM;  // Mouse behaves like with :confirm.
   setmouse();  // Disable mouse in xterm.
   no_mapping++;
+  allow_keys++;  // no mapping here, but recognize keys
 
   int r = ' ';
   while (r != 'y' && r != 'n') {
@@ -62,6 +63,7 @@ int ask_yesno(const char *const str, const bool direct)
   State = save_State;
   setmouse();
   no_mapping--;
+  allow_keys--;
 
   return r;
 }
@@ -172,6 +174,7 @@ int get_number(int colon, int *mouse_used)
   }
 
   no_mapping++;
+  allow_keys++;  // no mapping here, but recognize keys
   for (;;) {
     ui_cursor_goto(msg_row, msg_col);
     c = safe_vgetc();
@@ -205,6 +208,7 @@ int get_number(int colon, int *mouse_used)
     }
   }
   no_mapping--;
+  allow_keys--;
   return n;
 }
 

src/nvim/message.c

@@ -1146,6 +1146,7 @@ void wait_return(int redraw)
       // Don't do mappings here, we put the character back in the
       // typeahead buffer.
       no_mapping++;
+      allow_keys++;
 
       // Temporarily disable Recording. If Recording is active, the
       // character will be recorded later, since it will be added to the
@@ -1159,6 +1160,7 @@ void wait_return(int redraw)
         got_int = false;
       }
       no_mapping--;
+      allow_keys--;
       reg_recording = save_reg_recording;
       scriptout = save_scriptout;
 

src/nvim/normal.c

@@ -638,6 +638,7 @@ static void normal_get_additional_char(NormalState *s)
   int lang;                     // getting a text character
 
   no_mapping++;
+  allow_keys++;                 // no mapping for nchar, but allow key codes
   // Don't generate a CursorHold event here, most commands can't handle
   // it, e.g., nv_replace(), nv_csearch().
   did_cursorhold = true;
@@ -676,6 +677,7 @@ static void normal_get_additional_char(NormalState *s)
     if (lang && curbuf->b_p_iminsert == B_IMODE_LMAP) {
       // Allow mappings defined with ":lmap".
       no_mapping--;
+      allow_keys--;
       if (repl) {
         State = LREPLACE;
       } else {
@@ -689,6 +691,7 @@ static void normal_get_additional_char(NormalState *s)
     if (langmap_active) {
       // Undo the decrement done above
       no_mapping++;
+      allow_keys++;
     }
     State = NORMAL_BUSY;
     s->need_flushbuf |= add_to_showcmd(*cp);
@@ -769,6 +772,7 @@ static void normal_get_additional_char(NormalState *s)
     no_mapping++;
   }
   no_mapping--;
+  allow_keys--;
 }
 
 static void normal_invert_horizontal(NormalState *s)
@@ -826,6 +830,7 @@ static bool normal_get_command_count(NormalState *s)
 
     if (s->ctrl_w) {
       no_mapping++;
+      allow_keys++;                   // no mapping for nchar, but keys
     }
 
     no_zero_mapping++;                // don't map zero here
@@ -834,6 +839,7 @@ static bool normal_get_command_count(NormalState *s)
     no_zero_mapping--;
     if (s->ctrl_w) {
       no_mapping--;
+      allow_keys--;
     }
     s->need_flushbuf |= add_to_showcmd(s->c);
   }
@@ -844,9 +850,11 @@ static bool normal_get_command_count(NormalState *s)
     s->ca.opcount = s->ca.count0;           // remember first count
     s->ca.count0 = 0;
     no_mapping++;
+    allow_keys++;                        // no mapping for nchar, but keys
     s->c = plain_vgetc();                // get next character
     LANGMAP_ADJUST(s->c, true);
     no_mapping--;
+    allow_keys--;
     s->need_flushbuf |= add_to_showcmd(s->c);
     return true;
   }
@@ -3407,9 +3415,11 @@ static void nv_zet(cmdarg_T *cap)
     n = nchar - '0';
     for (;;) {
       no_mapping++;
+      allow_keys++;         // no mapping for nchar, but allow key codes
       nchar = plain_vgetc();
       LANGMAP_ADJUST(nchar, true);
       no_mapping--;
+      allow_keys--;
       (void)add_to_showcmd(nchar);
       if (nchar == K_DEL || nchar == K_KDEL) {
         n /= 10;
@@ -3785,9 +3795,11 @@ dozet:
 
   case 'u':     // "zug" and "zuw": undo "zg" and "zw"
     no_mapping++;
+    allow_keys++;               // no mapping for nchar, but allow key codes
     nchar = plain_vgetc();
     LANGMAP_ADJUST(nchar, true);
     no_mapping--;
+    allow_keys--;
     (void)add_to_showcmd(nchar);
     if (vim_strchr((char_u *)"gGwW", nchar) == NULL) {
       clearopbeep(cap->oap);

src/nvim/window.c

@@ -534,11 +534,13 @@ wingotofile:
   case Ctrl_G:
     CHECK_CMDWIN;
     no_mapping++;
+    allow_keys++;               // no mapping for xchar, but allow key codes
     if (xchar == NUL) {
       xchar = plain_vgetc();
     }
     LANGMAP_ADJUST(xchar, true);
     no_mapping--;
+    allow_keys--;
     (void)add_to_showcmd(xchar);
     switch (xchar) {
     case '}':