Linux: Fix numpad arrow keys not working when num lock is off

Fixes #857

docs/changelog.rst

@@ -10,6 +10,8 @@ Changelog
   font fallback for all subsequent characters that cannot be rendered in the
   main font to fail (:iss:`799`)
 
+- Linux: Fix numpad arrow keys not working when num lock is off (:iss:`857`)
+
 - Allow mapping shortcuts using the raw key code from the OS (:iss:`848`)
 
 - Allow mapping of individual keypresses without modifiers as shortcuts

glfw/xkb_glfw.c

@@ -33,7 +33,7 @@
 #define debug(...) if (_glfw.hints.init.debugKeyboard) printf(__VA_ARGS__);
 
 
-#define map_key(key) { \
+#define map_key(key) \
     switch(key) { \
         S(space, SPACE); \
         S(apostrophe, APOSTROPHE); \
@@ -93,10 +93,6 @@
         D(A, Z, A, Z); \
         R(F1, F25, F1, F25); \
         R(KP_0, KP_9, KP_0, KP_9); \
-        default: \
-            break; \
-    } \
-}
 
 static int
 glfw_key_for_sym(xkb_keysym_t key) {
@@ -105,6 +101,13 @@ glfw_key_for_sym(xkb_keysym_t key) {
 #define R(s, e, gs, ...) case XKB_KEY_##s ... XKB_KEY_##e: return GLFW_KEY_##gs + key - XKB_KEY_##s
 #define D(s, e, gs, ...) R(s, e, gs)
     map_key(key)
+        S(KP_Up, UP);
+        S(KP_Down, DOWN);
+        S(KP_Left, LEFT);
+        S(KP_Right, RIGHT);
+        default:
+            break;
+    }
     return GLFW_KEY_UNKNOWN;
 #undef F
 #undef D
@@ -119,6 +122,9 @@ glfw_xkb_sym_for_key(int key) {
 #define R(s, e, gs, ge) case GLFW_KEY_##gs ... GLFW_KEY_##ge: return XKB_KEY_##s + key - GLFW_KEY_##gs
 #define D(...)
     map_key(key)
+    default:
+        break;
+    }
     return GLFW_KEY_UNKNOWN;
 #undef F
 #undef D