Include libportal and reproduce bug

Demonstrate bug for flatpak/libportal#199

Author: TheEvilSkeleton

page.tesk.SettingsNotIncluded.json

@@ -23,6 +23,24 @@
         "*.a"
     ],
     "modules" : [
+        {
+            "name": "libportal",
+            "buildsystem": "meson",
+            "config-opts": [
+                "-Dtests=false",
+                "-Dbackend-gtk3=disabled",
+                "-Dbackend-gtk4=enabled",
+                "-Dbackend-qt5=disabled",
+                "-Ddocs=false"
+            ],
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "https://github.com/flatpak/libportal/releases/download/0.9.1/libportal-0.9.1.tar.xz",
+                    "sha256": "de801ee349ed3c255a9af3c01b1a401fab5b3fc1c35eb2fd7dfb35d4b8194d7f"
+                }
+            ]
+        },
         {
             "name" : "settingsnotincluded",
             "builddir" : true,

src/meson.build

@@ -6,6 +6,7 @@ settingsnotincluded_sources = [
 
 settingsnotincluded_deps = [
   dependency('gtk4'),
+  dependency('libportal-gtk4'),
 ]
 
 settingsnotincluded_sources += gnome.compile_resources('settingsnotincluded-resources',

src/settingsnotincluded-application.c

@@ -20,13 +20,18 @@
 
 #include "config.h"
 #include <glib/gi18n.h>
+#include <libportal/portal.h>
+
+/* FIXME: Commented out to demonstrate reproducer */
+/* #include <libportal/settings.h> */
 
 #include "settingsnotincluded-application.h"
 #include "settingsnotincluded-window.h"
 
 struct _SettingsnotincludedApplication
 {
   GtkApplication parent_instance;
+  XdpPortal *portal;
 };
 
 G_DEFINE_FINAL_TYPE (SettingsnotincludedApplication, settingsnotincluded_application, GTK_TYPE_APPLICATION)
@@ -112,12 +117,20 @@ static const GActionEntry app_actions[] = {
 static void
 settingsnotincluded_application_init (SettingsnotincludedApplication *self)
 {
+  XdpSettings *settings;
+
   g_action_map_add_action_entries (G_ACTION_MAP (self),
                                    app_actions,
                                    G_N_ELEMENTS (app_actions),
                                    self);
   gtk_application_set_accels_for_action (GTK_APPLICATION (self),
                                          "app.quit",
                                          (const char *[]){ "<primary>q", NULL });
+
+  self->portal = xdp_portal_new ();
+  settings = xdp_portal_get_settings (self->portal);
+
+  /* FIXME: Here lies the problem */
+  xdp_settings_read_uint (settings, "org.freedesktop.appearance", "color-scheme", NULL, NULL);
 }