Replace XkbGetKeyboard with XkbGetMap

Switch to XkbGetMap as XkbGetKeyboard returns NULL on XWayland.

Fixes #389.

README.md

@@ -94,6 +94,7 @@ GLFW bundles a number of dependencies in the `deps/` directory.
  - [X11] Bugfix: The `GLFW_DECORATED` hint was not ignored for full screen
  - [X11] Bugfix: `glfwWaitEvents` did not handle `EINTR` for `select`
  - [X11] Bugfix: `glfwWaitEvents` could return when no events were available
+ - [X11] Bugfix: `XkbGetKeyboard` fails on XWayland
  - [WGL] Made all WGL functions dynamically loaded
  - [WGL] Removed `GLFW_USE_DWM_SWAP_INTERVAL` compile-time option
  - [WGL] Bugfix: Swap interval was ignored when DWM was enabled

src/x11_init.c

@@ -241,15 +241,14 @@ static void createKeyTables(void)
         // keyboard layout
 
         char name[XkbKeyNameLength + 1];
-        XkbDescPtr descr = XkbGetKeyboard(_glfw.x11.display,
-                                          XkbAllComponentsMask,
-                                          XkbUseCoreKbd);
+        XkbDescPtr desc = XkbGetMap(_glfw.x11.display, 0, XkbUseCoreKbd);
+        XkbGetNames(_glfw.x11.display, XkbKeyNamesMask, desc);
 
         // Find the X11 key code -> GLFW key code mapping
-        for (scancode = descr->min_key_code;  scancode <= descr->max_key_code;  scancode++)
+        for (scancode = desc->min_key_code;  scancode <= desc->max_key_code;  scancode++)
         {
-            memcpy(name, descr->names->keys[scancode].name, XkbKeyNameLength);
-            name[XkbKeyNameLength] = 0;
+            memcpy(name, desc->names->keys[scancode].name, XkbKeyNameLength);
+            name[XkbKeyNameLength] = '\0';
 
             // Map the key name to a GLFW key code. Note: We only map printable
             // keys here, and we use the US keyboard layout. The rest of the
@@ -309,7 +308,8 @@ static void createKeyTables(void)
                 _glfw.x11.publicKeys[scancode] = key;
         }
 
-        XkbFreeKeyboard(descr, 0, True);
+        XkbFreeNames(desc, XkbKeyNamesMask, True);
+        XkbFreeClientMap(desc, 0, True);
     }
 
     // Translate the un-translated key codes using traditional X11 KeySym