gdesktopappinfo: Set XDG_ACTIVATION_TOKEN/activation-token startup ID key

See:
 * https://gitlab.freedesktop.org/xdg/xdg-specs/-/blob/master/desktop-entry/desktop-entry-spec.xml#L1061-1068
 * https://wayland.app/protocols/xdg-activation-v1
 * https://gitlab.freedesktop.org/wayland/wayland-protocols/-/blob/main/staging/xdg-activation/x11-interoperation.rst

Fixes: #2709

4 files changed, 39 insertions, 11 deletions

diff --git a/gio/gappinfo.c b/gio/gappinfo.c
index d1a1a1d65..8449aab2d 100644
--- a/gio/gappinfo.c
+++ b/gio/gappinfo.c
@@ -577,9 +577,9 @@ g_app_info_get_icon (GAppInfo *appinfo)
  * environment variable with the path of the launched desktop file and
  * `GIO_LAUNCHED_DESKTOP_FILE_PID` to the process id of the launched
  * process. This can be used to ignore `GIO_LAUNCHED_DESKTOP_FILE`,
- * should it be inherited by further processes. The `DISPLAY` and
- * `DESKTOP_STARTUP_ID` environment variables are also set, based
- * on information provided in @context.
+ * should it be inherited by further processes. The `DISPLAY`,
+ * `XDG_ACTIVATION_TOKEN` and `DESKTOP_STARTUP_ID` environment
+ * variables are also set, based on information provided in @context.
  *
  * Returns: %TRUE on successful launch, %FALSE otherwise.
  **/
@@ -1594,10 +1594,18 @@ g_app_launch_context_get_display (GAppLaunchContext *context,
  * @files: (element-type GFile): a #GList of of #GFile objects
  * 
  * Initiates startup notification for the application and returns the
- * `DESKTOP_STARTUP_ID` for the launched operation, if supported.
+ * `XDG_ACTIVATION_TOKEN` or `DESKTOP_STARTUP_ID` for the launched operation,
+ * if supported.
  *
- * Startup notification IDs are defined in the 
- * [FreeDesktop.Org Startup Notifications standard](http://standards.freedesktop.org/startup-notification-spec/startup-notification-latest.txt).
+ * The returned token may be referred to equivalently as an ‘activation token’
+ * (using Wayland terminology) or a ‘startup sequence ID’ (using X11 terminology).
+ * The two [are interoperable](https://gitlab.freedesktop.org/wayland/wayland-protocols/-/blob/main/staging/xdg-activation/x11-interoperation.rst).
+ *
+ * Activation tokens are defined in the [XDG Activation Protocol](https://wayland.app/protocols/xdg-activation-v1),
+ * and startup notification IDs are defined in the 
+ * [freedesktop.org Startup Notification Protocol](http://standards.freedesktop.org/startup-notification-spec/startup-notification-latest.txt).
+ *
+ * Support for the XDG Activation Protocol was added in GLib 2.76.
  *
  * Returns: (nullable): a startup notification ID for the application, or %NULL if
  *     not supported.
diff --git a/gio/gapplication-tool.c b/gio/gapplication-tool.c
index 514d99a3f..b810e8ee9 100644
--- a/gio/gapplication-tool.c
+++ b/gio/gapplication-tool.c
@@ -304,6 +304,9 @@ app_get_platform_data (void)
   if ((startup_id = g_getenv ("DESKTOP_STARTUP_ID")))
     g_variant_builder_add (&builder, "{sv}", "desktop-startup-id", g_variant_new_string (startup_id));
 
+  if ((startup_id = g_getenv ("XDG_ACTIVATION_TOKEN")))
+    g_variant_builder_add (&builder, "{sv}", "activation-token", g_variant_new_string (startup_id));
+
   return g_variant_builder_end (&builder);
 }
 
diff --git a/gio/gdesktopappinfo.c b/gio/gdesktopappinfo.c
index d0cdef51a..5f2525b23 100644
--- a/gio/gdesktopappinfo.c
+++ b/gio/gdesktopappinfo.c
@@ -2895,7 +2895,10 @@ g_desktop_app_info_launch_uris_with_spawn (GDesktopAppInfo            *info,
                                                                   G_APP_INFO (info),
                                                                   launched_files);
               if (sn_id)
-                envp = g_environ_setenv (envp, "DESKTOP_STARTUP_ID", sn_id, TRUE);
+                {
+                  envp = g_environ_setenv (envp, "DESKTOP_STARTUP_ID", sn_id, TRUE);
+                  envp = g_environ_setenv (envp, "XDG_ACTIVATION_TOKEN", sn_id, TRUE);
+                }
             }
 
           g_list_free_full (launched_files, g_object_unref);
@@ -3032,7 +3035,10 @@ g_desktop_app_info_make_platform_data (GDesktopAppInfo   *info,
 
           sn_id = g_app_launch_context_get_startup_notify_id (launch_context, G_APP_INFO (info), launched_files);
           if (sn_id)
-            g_variant_builder_add (&builder, "{sv}", "desktop-startup-id", g_variant_new_take_string (sn_id));
+            {
+              g_variant_builder_add (&builder, "{sv}", "desktop-startup-id", g_variant_new_string (sn_id));
+              g_variant_builder_add (&builder, "{sv}", "activation-token", g_variant_new_take_string (g_steal_pointer (&sn_id)));
+            }
         }
 
       g_list_free_full (launched_files, g_object_unref);
diff --git a/gio/tests/dbus-appinfo.c b/gio/tests/dbus-appinfo.c
index 91e76403c..d84de7de9 100644
--- a/gio/tests/dbus-appinfo.c
+++ b/gio/tests/dbus-appinfo.c
@@ -226,13 +226,24 @@ test_application_before_emit (GApplication *application,
                               GVariant     *platform_data)
 {
   const gchar *startup_id;
+  gsize i;
 
   g_assert (!saw_startup_id);
 
-  if (!g_variant_lookup (platform_data, "desktop-startup-id", "&s", &startup_id))
-    return;
+  const gchar *startup_id_keys[] = {
+    "desktop-startup-id",
+    "activation-token",
+    NULL,
+  };
+
+  for (i = 0; startup_id_keys[i] != NULL; i++)
+    {
+      if (!g_variant_lookup (platform_data, startup_id_keys[i], "&s", &startup_id))
+        return;
+
+      g_assert_cmpstr (startup_id, ==, "expected startup id");
+    }
 
-  g_assert_cmpstr (startup_id, ==, "expected startup id");
   saw_startup_id = TRUE;
 }