File tecla-return-NULL-if-no-xkb_keymap.patch of Package tecla-keyboard-layout-viewer

commit d6760195ab13d29bce1c6590638e4200cd6632f2 (HEAD -> d6760195ab13d29bce1c6590638e4200cd6632f2)
Author: Carlos Garnacho <carlosg@gnome.org>
Date:   Thu Sep 21 13:24:58 2023 +0200

    model: Return NULL if no xkb_keymap could be created
    
    Right now we are somewhat optimistic that the passed keymap
    name does exist, triggering crashes if it does not. Make
    TeclaModel constructors return NULL if XKB does not know
    about the given name/variant.
    
    Closes: https://gitlab.gnome.org/GNOME/tecla/-/issues/16

diff -Nura tecla-45.0/src/tecla-model.c tecla-45.0_new/src/tecla-model.c
--- tecla-45.0/src/tecla-model.c	2023-09-17 01:02:57.000000000 +0800
+++ tecla-45.0_new/src/tecla-model.c	2024-03-31 16:46:54.193944659 +0800
@@ -299,7 +299,7 @@
 TeclaModel *
 tecla_model_new_from_layout_name (const gchar *name)
 {
-	TeclaModel *model;
+        TeclaModel *model = NULL;
 	struct xkb_context *xkb_context;
 	struct xkb_keymap *xkb_keymap;
 	g_autofree gchar *layout = NULL;
@@ -325,8 +325,10 @@
 	xkb_keymap = xkb_keymap_new_from_names (xkb_context, &rule_names, 0);
 	xkb_context_unref (xkb_context);
 
-	model = tecla_model_new_from_xkb_keymap (xkb_keymap);
-	xkb_keymap_unref (xkb_keymap);
+        if (xkb_keymap) {
+                model = tecla_model_new_from_xkb_keymap (xkb_keymap);
+                xkb_keymap_unref (xkb_keymap);
+        }
 
 	return model;
 }