prefs: Add get_keybinding_label() method

Commit 7e9d9c7eb91 added new API to replace GTK for accelerator
parsing.

Unfortunately there is another case in gnome-shell, where we have
to get the label from the logical binding name rather than the
modifier+keysym combination.

Add another small method to cover that use case.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2899>

2 files changed, 19 insertions, 0 deletions

diff --git a/src/core/prefs.c b/src/core/prefs.c
index 82bf58d8c..25a1524af 100644
--- a/src/core/prefs.c
+++ b/src/core/prefs.c
@@ -2186,6 +2186,22 @@ meta_prefs_get_keybinding_action (const char *name)
               : META_KEYBINDING_ACTION_NONE;
 }
 
+/**
+ * meta_prefs_get_keybinding_label:
+ * Returns: (transfer full) (nullable)
+ */
+char *
+meta_prefs_get_keybinding_label (const char *name)
+{
+  MetaKeyPref *pref = g_hash_table_lookup (key_bindings, name);
+  MetaKeyCombo *combo = NULL;
+
+  if (pref && pref->combos)
+    combo = pref->combos->data;
+
+  return combo ? meta_accelerator_name (combo->modifiers, combo->keysym) : NULL;
+}
+
 gint
 meta_prefs_get_mouse_button_resize (void)
 {
diff --git a/src/meta/prefs.h b/src/meta/prefs.h
index f1c9e5805..d6dd93d74 100644
--- a/src/meta/prefs.h
+++ b/src/meta/prefs.h
@@ -469,6 +469,9 @@ META_EXPORT
 MetaKeyBindingAction meta_prefs_get_keybinding_action (const char *name);
 
 META_EXPORT
+char * meta_prefs_get_keybinding_label (const char *name);
+
+META_EXPORT
 gboolean           meta_prefs_get_visual_bell      (void);
 
 META_EXPORT