Don't block Alt + Shift when there is only one keyboard layout (#1756)

Author: lenemter

data/gala.metainfo.xml.in

@@ -25,6 +25,18 @@
   <update_contact>contact_at_elementary.io</update_contact>
 
   <releases>
+    <release version="7.1.3" date="2023-09-13" urgency="medium">
+      <description>
+        <p>Improvements:</p>
+        <ul>
+          <li>Updated translations</li>
+        </ul>
+      </description>
+      <issues>
+        <issue url="https://github.com/elementary/gala/issues/1261">Alt + Shift unnecessarily blocked when there is only one keyboard layout</issue>
+      </issues>
+    </release>
+
     <release version="7.1.2" date="2023-08-10" urgency="medium">
       <description>
         <p>Improvements:</p>

src/KeyboardManager.vala

@@ -5,6 +5,12 @@
  */
 
 public class Gala.KeyboardManager : Object {
+    private const string[] BLOCKED_OPTIONS = {
+        "grp:alt_caps_toggle", "grp:alt_shift_toggle", "grp:alt_space_toggle",
+        "grp:shifts_toggle", "grp:caps_toggle", "grp:ctrl_alt_toggle",
+        "grp:ctrl_shift_toggle", "grp:shift_caps_toggle"
+    };
+
     private static KeyboardManager? instance;
     private static VariantType sources_variant_type;
     private static GLib.Settings settings;
@@ -90,7 +96,21 @@ public class Gala.KeyboardManager : Object {
                 }
             }
 
-            var xkb_options = settings.get_strv ("xkb-options");
+            if (layouts.length == 0) {
+                layouts = { "us" };
+                variants = { "" };
+            }
+
+            string[] xkb_options = {};
+            if (layouts.length == 1) {
+                foreach (unowned var option in settings.get_strv ("xkb-options")) {
+                    if (!(option in BLOCKED_OPTIONS)) {
+                        xkb_options += option;
+                    }
+                }
+            } else {
+                xkb_options = settings.get_strv ("xkb-options");
+            }
 
             var layout = string.joinv (",", layouts);
             var variant = string.joinv (",", variants);