add autostart code for Flatpak (whohoo!)

Author: Berny23

.clangd

@@ -1,4 +1,4 @@
 CompileFlags:
-  Add: [-std=c++20, -I/usr/include/pipewire-0.3/, -I/usr/include/spa-0.2/]
+  Add: [-std=c++20, -I/usr/include/pipewire-0.3/, -I/usr/include/spa-0.2/, -I/usr/include/glib-2.0/, -I/usr/lib/glib-2.0/include/]
   Remove:
     - -mno-direct-extern-access

CMakeLists.txt

@@ -45,6 +45,12 @@ find_package(PkgConfig REQUIRED)
 # PipeWire dependencies
 pkg_check_modules(PIPEWIRE REQUIRED libpipewire-0.3)
 
+# Flatpak stuff
+if(IS_FLATPAK)
+    pkg_check_modules(LIBPORTAL IMPORTED_TARGET REQUIRED libportal)
+    pkg_check_modules(LIBPORTALQT IMPORTED_TARGET REQUIRED libportal-qt6)
+endif(IS_FLATPAK)
+
 # Translations
 ki18n_install(po)
 

dist/flatpak/de.berny23.virtual_surround_manager.Devel.json

@@ -67,6 +67,23 @@
                             "commit": "3e67b89a1adb4c98c248668189f8e21c6ddc68be"
                         }
                     ]
+                },
+                {
+                    "name": "libportal",
+                    "buildsystem": "meson",
+                    "config-opts": [
+                        "-Ddocs=false",
+                        "-Dvapi=false",
+                        "-Dbackend-qt6=enabled"
+                    ],
+                    "sources": [
+                        {
+                            "type": "git",
+                            "url": "https://github.com/flatpak/libportal.git",
+                            "tag": "0.10.0",
+                            "commit": "c23024018c8eb076549a1517fcb2d7f80d3e2ed5"
+                        }
+                    ]
                 }
             ]
         }

src/CMakeLists.txt

@@ -39,6 +39,11 @@ target_link_libraries(virtual-surround-manager PRIVATE ${PIPEWIRE_LIBRARIES})
 if(IS_FLATPAK)
     message(STATUS "Flatpak build")
     target_compile_definitions(virtual-surround-manager PRIVATE IS_FLATPAK=1)
+    target_link_libraries(virtual-surround-manager
+        PRIVATE
+        PkgConfig::LIBPORTAL
+        PkgConfig::LIBPORTALQT
+    )
 endif(IS_FLATPAK)
 
 # AppImage stuff

src/frontend_manager.cpp

@@ -236,8 +236,10 @@ void FrontendManager::set_autostart_enabled(bool value) {
     const QString destination = QStandardPaths::standardLocations(QStandardPaths::ConfigLocation).value(0) + QStringLiteral("/autostart/de.berny23.virtual_surround_manager.desktop");
 
 #ifdef IS_FLATPAK
-// TODO: Use portal with option autostart like this: https://flatpak.github.io/xdg-desktop-portal/docs/doc-org.freedesktop.portal.Background.html
-// This can be called with the variable m_autostart_enabled directly, outside if.
+    // Use libportal to request Flatpak autostart
+    g_autoptr(GPtrArray) cmd = nullptr;
+    XdpBackgroundFlags flags = value ? XDP_BACKGROUND_FLAG_AUTOSTART : XDP_BACKGROUND_FLAG_NONE;
+    xdp_portal_request_background(XdpQt::globalPortalObject(), nullptr, const_cast<char *>("Autostart"), cmd, flags, nullptr, nullptr, this);
 #endif
 
     if (m_autostart_enabled) {

src/frontend_manager.h

@@ -15,6 +15,13 @@
 #include <qtmetamacros.h>
 #include <qurl.h>
 
+#ifdef IS_FLATPAK
+#include <glib.h>
+#include <glibconfig.h>
+#include <libportal-qt6/portal-qt6.h>
+#include <libportal/background.h>
+#endif
+
 class FrontendManager : public QObject {
     Q_OBJECT
     // Whether virtual surround sound is enabled or not