SDL: wayland: Handle the Num Lock and Caps Lock modifiers via modifier events (8b74b)

From 8b74be464ff58466fa7226531845538515c73079 Mon Sep 17 00:00:00 2001
From: Frank Praznik <[EMAIL REDACTED]>
Date: Thu, 8 Dec 2022 10:56:55 -0500
Subject: [PATCH] wayland: Handle the Num Lock and Caps Lock modifiers via
 modifier events

Num Lock and Caps Lock always need to be explicitly handled by the modifier handler function, or they won't be correctly set if active at application startup, or if the lock state is changed while the application lacks focus since a key press for these keys will never be received.  In these cases, the internal SDL modifier state can end up the inverse of the actual modifier state.

(cherry picked from commit 653e484da17d773f40bff94121a23a3b38f47a0a)
---
 src/video/wayland/SDL_waylandevents.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/video/wayland/SDL_waylandevents.c b/src/video/wayland/SDL_waylandevents.c
index 0ce0ecb7643c..04cef504e46a 100644
--- a/src/video/wayland/SDL_waylandevents.c
+++ b/src/video/wayland/SDL_waylandevents.c
@@ -1248,14 +1248,15 @@ static void keyboard_handle_modifiers(void *data, struct wl_keyboard *keyboard,
     WAYLAND_xkb_state_update_mask(input->xkb.state, mods_depressed, mods_latched,
                                   mods_locked, 0, 0, group);
 
+    SDL_ToggleModState(KMOD_NUM, modstate & input->xkb.idx_num);
+    SDL_ToggleModState(KMOD_CAPS, modstate & input->xkb.idx_caps);
+
     /* Toggle the modifier states for virtual keyboards, as they may not send key presses. */
     if (input->keyboard_is_virtual) {
         SDL_ToggleModState(KMOD_SHIFT, modstate & input->xkb.idx_shift);
         SDL_ToggleModState(KMOD_CTRL, modstate & input->xkb.idx_ctrl);
         SDL_ToggleModState(KMOD_ALT, modstate & input->xkb.idx_alt);
         SDL_ToggleModState(KMOD_GUI, modstate & input->xkb.idx_gui);
-        SDL_ToggleModState(KMOD_NUM, modstate & input->xkb.idx_num);
-        SDL_ToggleModState(KMOD_CAPS, modstate & input->xkb.idx_caps);
     }
 
     /* If a key is repeating, update the text to apply the modifier. */