keymap, terminal: more keycodes #9810

- input: recognize <kEqual>, <kComma>
- terminal.c: If we need to support function key, a change must be made
  in libvtermkey. Currently, it emulates strictly VT220 terminal, and
  returning numeric value in 'normal' mode is the expected behaviour.

closes #9810

5 files changed, 50 insertions, 36 deletions

diff --git a/src/nvim/getchar.c b/src/nvim/getchar.c
index 87a8d9b53e..c29ef9f822 100644
--- a/src/nvim/getchar.c
+++ b/src/nvim/getchar.c
@@ -1431,6 +1431,8 @@ int vgetc(void)
         case K_KMULTIPLY:   c = '*'; break;
         case K_KENTER:      c = CAR; break;
         case K_KPOINT:      c = '.'; break;
+        case K_KCOMMA:      c = ','; break;
+        case K_KEQUAL:      c = '='; break;
         case K_K0:          c = '0'; break;
         case K_K1:          c = '1'; break;
         case K_K2:          c = '2'; break;
diff --git a/src/nvim/keymap.c b/src/nvim/keymap.c
index ea04f1251e..9145813525 100644
--- a/src/nvim/keymap.c
+++ b/src/nvim/keymap.c
@@ -263,6 +263,10 @@ static const struct key_name_entry {
   { K_KENTER,          "kEnter" },
   { K_KENTER,          "KPEnter" },
   { K_KPOINT,          "kPoint" },
+  { K_KCOMMA,          "kComma" },
+  { K_KCOMMA,          "KPComma" },
+  { K_KEQUAL,          "kEqual" },
+  { K_KEQUAL,          "KPEquals" },
 
   { K_K0,              "k0" },
   { K_K1,              "k1" },
@@ -684,7 +688,7 @@ int find_special_key(const char_u **srcp, const size_t src_len, int *const modp,
         *modp = modifiers;
         *srcp = end_of_name;
         return key;
-      }
+      }  // else { ELOG("unknown key: '%s'", src); }
     }
   }
   return 0;
diff --git a/src/nvim/keymap.h b/src/nvim/keymap.h
index 92d8777382..7f0483826d 100644
--- a/src/nvim/keymap.h
+++ b/src/nvim/keymap.h
@@ -256,13 +256,13 @@ enum key_extra {
 #define K_ZERO          TERMCAP2KEY(KS_ZERO, KE_FILLER)
 
 #define K_UP            TERMCAP2KEY('k', 'u')
-#define K_KUP           TERMCAP2KEY('K', 'u')   /* keypad up */
+#define K_KUP           TERMCAP2KEY('K', 'u')   // keypad up
 #define K_DOWN          TERMCAP2KEY('k', 'd')
-#define K_KDOWN         TERMCAP2KEY('K', 'd')   /* keypad down */
+#define K_KDOWN         TERMCAP2KEY('K', 'd')   // keypad down
 #define K_LEFT          TERMCAP2KEY('k', 'l')
-#define K_KLEFT         TERMCAP2KEY('K', 'l')   /* keypad left */
+#define K_KLEFT         TERMCAP2KEY('K', 'l')   // keypad left
 #define K_RIGHT         TERMCAP2KEY('k', 'r')
-#define K_KRIGHT        TERMCAP2KEY('K', 'r')   /* keypad right */
+#define K_KRIGHT        TERMCAP2KEY('K', 'r')   // keypad right
 #define K_S_UP          TERMCAP2KEY(KS_EXTRA, KE_S_UP)
 #define K_S_DOWN        TERMCAP2KEY(KS_EXTRA, KE_S_DOWN)
 #define K_S_LEFT        TERMCAP2KEY('#', '4')
@@ -288,7 +288,7 @@ enum key_extra {
 #define K_XLEFT         TERMCAP2KEY(KS_EXTRA, KE_XLEFT)
 #define K_XRIGHT        TERMCAP2KEY(KS_EXTRA, KE_XRIGHT)
 
-#define K_F1            TERMCAP2KEY('k', '1')   /* function keys */
+#define K_F1            TERMCAP2KEY('k', '1')   // function keys
 #define K_F2            TERMCAP2KEY('k', '2')
 #define K_F3            TERMCAP2KEY('k', '3')
 #define K_F4            TERMCAP2KEY('k', '4')
@@ -335,7 +335,7 @@ enum key_extra {
 #define K_S_XF3         TERMCAP2KEY(KS_EXTRA, KE_S_XF3)
 #define K_S_XF4         TERMCAP2KEY(KS_EXTRA, KE_S_XF4)
 
-#define K_S_F1          TERMCAP2KEY(KS_EXTRA, KE_S_F1)  /* shifted func. keys */
+#define K_S_F1          TERMCAP2KEY(KS_EXTRA, KE_S_F1)  // shifted func. keys
 #define K_S_F2          TERMCAP2KEY(KS_EXTRA, KE_S_F2)
 #define K_S_F3          TERMCAP2KEY(KS_EXTRA, KE_S_F3)
 #define K_S_F4          TERMCAP2KEY(KS_EXTRA, KE_S_F4)
@@ -360,36 +360,39 @@ enum key_extra {
 #define K_DEL           TERMCAP2KEY('k', 'D')
 #define K_KDEL          TERMCAP2KEY(KS_EXTRA, KE_KDEL)
 #define K_HOME          TERMCAP2KEY('k', 'h')
-#define K_KHOME         TERMCAP2KEY('K', '1')   /* keypad home (upper left) */
+#define K_KHOME         TERMCAP2KEY('K', '1')   // keypad home (upper left)
 #define K_XHOME         TERMCAP2KEY(KS_EXTRA, KE_XHOME)
 #define K_ZHOME         TERMCAP2KEY(KS_EXTRA, KE_ZHOME)
 #define K_END           TERMCAP2KEY('@', '7')
-#define K_KEND          TERMCAP2KEY('K', '4')   /* keypad end (lower left) */
+#define K_KEND          TERMCAP2KEY('K', '4')   // keypad end (lower left)
 #define K_XEND          TERMCAP2KEY(KS_EXTRA, KE_XEND)
 #define K_ZEND          TERMCAP2KEY(KS_EXTRA, KE_ZEND)
 #define K_PAGEUP        TERMCAP2KEY('k', 'P')
 #define K_PAGEDOWN      TERMCAP2KEY('k', 'N')
-#define K_KPAGEUP       TERMCAP2KEY('K', '3')   /* keypad pageup (upper R.) */
-#define K_KPAGEDOWN     TERMCAP2KEY('K', '5')   /* keypad pagedown (lower R.) */
-#define K_KORIGIN       TERMCAP2KEY('K', '2')   /* keypad center */
-
-#define K_KPLUS         TERMCAP2KEY('K', '6')   /* keypad plus */
-#define K_KMINUS        TERMCAP2KEY('K', '7')   /* keypad minus */
-#define K_KDIVIDE       TERMCAP2KEY('K', '8')   /* keypad / */
-#define K_KMULTIPLY     TERMCAP2KEY('K', '9')   /* keypad * */
-#define K_KENTER        TERMCAP2KEY('K', 'A')   /* keypad Enter */
-#define K_KPOINT        TERMCAP2KEY('K', 'B')   /* keypad . or ,*/
-
-#define K_K0            TERMCAP2KEY('K', 'C')   /* keypad 0 */
-#define K_K1            TERMCAP2KEY('K', 'D')   /* keypad 1 */
-#define K_K2            TERMCAP2KEY('K', 'E')   /* keypad 2 */
-#define K_K3            TERMCAP2KEY('K', 'F')   /* keypad 3 */
-#define K_K4            TERMCAP2KEY('K', 'G')   /* keypad 4 */
-#define K_K5            TERMCAP2KEY('K', 'H')   /* keypad 5 */
-#define K_K6            TERMCAP2KEY('K', 'I')   /* keypad 6 */
-#define K_K7            TERMCAP2KEY('K', 'J')   /* keypad 7 */
-#define K_K8            TERMCAP2KEY('K', 'K')   /* keypad 8 */
-#define K_K9            TERMCAP2KEY('K', 'L')   /* keypad 9 */
+#define K_KPAGEUP       TERMCAP2KEY('K', '3')   // keypad pageup (upper R.)
+#define K_KPAGEDOWN     TERMCAP2KEY('K', '5')   // keypad pagedown (lower R.)
+#define K_KORIGIN       TERMCAP2KEY('K', '2')   // keypad center
+
+#define K_KPLUS         TERMCAP2KEY('K', '6')   // keypad plus
+#define K_KMINUS        TERMCAP2KEY('K', '7')   // keypad minus
+#define K_KDIVIDE       TERMCAP2KEY('K', '8')   // keypad /
+#define K_KMULTIPLY     TERMCAP2KEY('K', '9')   // keypad *
+#define K_KENTER        TERMCAP2KEY('K', 'A')   // keypad Enter
+#define K_KPOINT        TERMCAP2KEY('K', 'B')   // keypad . or ,
+
+#define K_K0            TERMCAP2KEY('K', 'C')   // keypad 0
+#define K_K1            TERMCAP2KEY('K', 'D')   // keypad 1
+#define K_K2            TERMCAP2KEY('K', 'E')   // keypad 2
+#define K_K3            TERMCAP2KEY('K', 'F')   // keypad 3
+#define K_K4            TERMCAP2KEY('K', 'G')   // keypad 4
+#define K_K5            TERMCAP2KEY('K', 'H')   // keypad 5
+#define K_K6            TERMCAP2KEY('K', 'I')   // keypad 6
+#define K_K7            TERMCAP2KEY('K', 'J')   // keypad 7
+#define K_K8            TERMCAP2KEY('K', 'K')   // keypad 8
+#define K_K9            TERMCAP2KEY('K', 'L')   // keypad 9
+
+#define K_KCOMMA        TERMCAP2KEY('K', 'M')   // keypad comma
+#define K_KEQUAL        TERMCAP2KEY('K', 'N')   // keypad equal
 
 #define K_MOUSE         TERMCAP2KEY(KS_MOUSE, KE_FILLER)
 #define K_MENU          TERMCAP2KEY(KS_MENU, KE_FILLER)
diff --git a/src/nvim/main.c b/src/nvim/main.c
index aa7f93c15e..48feeea669 100644
--- a/src/nvim/main.c
+++ b/src/nvim/main.c
@@ -551,7 +551,7 @@ int main(int argc, char **argv)
 
   RedrawingDisabled = 0;
   redraw_all_later(NOT_VALID);
-  no_wait_return = FALSE;
+  no_wait_return = false;
 
   // 'autochdir' has been postponed.
   do_autochdir();
diff --git a/src/nvim/terminal.c b/src/nvim/terminal.c
index ffe650f416..4ef37f14d2 100644
--- a/src/nvim/terminal.c
+++ b/src/nvim/terminal.c
@@ -878,15 +878,20 @@ static VTermKey convert_key(int key, VTermModifier *statep)
     case K_KINS:      return VTERM_KEY_KP_0;
     case K_K1:        FALLTHROUGH;
     case K_KEND:      return VTERM_KEY_KP_1;
-    case K_K2:        return VTERM_KEY_KP_2;
+    case K_K2:        FALLTHROUGH;
+    case K_KDOWN:     return VTERM_KEY_KP_2;
     case K_K3:        FALLTHROUGH;
     case K_KPAGEDOWN: return VTERM_KEY_KP_3;
-    case K_K4:        return VTERM_KEY_KP_4;
-    case K_K5:        return VTERM_KEY_KP_5;
-    case K_K6:        return VTERM_KEY_KP_6;
+    case K_K4:        FALLTHROUGH;
+    case K_KLEFT:     return VTERM_KEY_KP_4;
+    case K_K5:        FALLTHROUGH;
+    case K_KORIGIN:   return VTERM_KEY_KP_5;
+    case K_K6:        FALLTHROUGH;
+    case K_KRIGHT:    return VTERM_KEY_KP_6;
     case K_K7:        FALLTHROUGH;
     case K_KHOME:     return VTERM_KEY_KP_7;
-    case K_K8:        return VTERM_KEY_KP_8;
+    case K_K8:        FALLTHROUGH;
+    case K_KUP:       return VTERM_KEY_KP_8;
     case K_K9:        FALLTHROUGH;
     case K_KPAGEUP:   return VTERM_KEY_KP_9;
     case K_KDEL:      FALLTHROUGH;