Add D-Bus notification driver

Use the core and portal notification implementations to dispatch system notifications.

src/video/wayland/SDL_waylandutil.c

@@ -26,6 +26,8 @@
 #include "SDL_waylandutil.h"
 #include "xdg-activation-v1-client-protocol.h"
 
+#include "../../notification/SDL_notification_c.h"
+
 #define WAYLAND_HANDLE_PREFIX "wayland:"
 
 typedef struct Wayland_ActivationParams
@@ -66,6 +68,9 @@ bool Wayland_GetActivationTokenForExport(SDL_VideoDevice *_this, char **token, c
     }
 
     const char *xdg_activation_token = SDL_getenv("XDG_ACTIVATION_TOKEN");
+    if (!xdg_activation_token) {
+        xdg_activation_token = SDL_GetNotificationActivationToken();
+    }
     if (xdg_activation_token) {
         *token = SDL_strdup(xdg_activation_token);
         if (!*token) {

src/video/wayland/SDL_waylandwindow.c

@@ -28,6 +28,7 @@
 #include "../SDL_sysvideo.h"
 #include "../../events/SDL_events_c.h"
 #include "../../core/unix/SDL_appid.h"
+#include "../../notification/SDL_notification_c.h"
 #include "../SDL_egl_c.h"
 #include "SDL_waylandevents_c.h"
 #include "SDL_waylandmouse.h"
@@ -2564,6 +2565,29 @@ static void Wayland_activate_window(SDL_VideoData *data, SDL_WindowData *target_
 
 void Wayland_RaiseWindow(SDL_VideoDevice *_this, SDL_Window *window)
 {
+    SDL_VideoData *viddata = _this->internal;
+    SDL_WindowData *wind = window->internal;
+
+    if (viddata->activation_manager) {
+        /* Check for an activation token, in case the window is being
+         * raised in response to a system notification.
+         *
+         * Note that we don't check for empty strings, as that is still
+         * considered a valid activation token!
+         */
+        const char *activation_token = SDL_GetNotificationActivationToken();
+        if (activation_token) {
+            xdg_activation_v1_activate(viddata->activation_manager,
+                                       activation_token,
+                                       wind->surface);
+
+            // Clear this variable, per the protocol's request.
+            SDL_unsetenv_unsafe("XDG_ACTIVATION_TOKEN");
+            return;
+        }
+    }
+
+    // No token? Try to activate the window via an event serial.
     Wayland_activate_window(_this->internal, window->internal, true);
 }
 

test/testnotification.c

@@ -29,7 +29,6 @@ static SDL_NotificationAction actions[] = {
     { .button = { SDL_NOTIFICATION_ACTION_TYPE_BUTTON, "action_1", "OK" } },
     { .button = { SDL_NOTIFICATION_ACTION_TYPE_BUTTON, "action_2", "Cancel" } }
 };
-static SDL_NotificationAction *action_array[SDL_arraysize(actions) + 1];
 
 static bool transient;
 static int sound;