events: Pump DBus messages in the main event loop

DBus does not require a video backend, and DBus messages still need to be processed even when a video backend is not initialized. Move the DBus pump call to the main event message pump function so that DBus events are still dispatched, even when a video backend has not been initialized.

src/events/SDL_events.c

@@ -36,6 +36,9 @@
 #ifndef SDL_SENSOR_DISABLED
 #include "../sensor/SDL_sensor_c.h"
 #endif
+#ifdef HAVE_DBUS_DBUS_H
+#include "core/linux/SDL_dbus.h"
+#endif
 #include "../video/SDL_sysvideo.h"
 
 #ifdef SDL_PLATFORM_ANDROID
@@ -59,6 +62,9 @@
 // Determines how often to pump events if tray items are active
 #define TRAY_POLL_INTERVAL_NS SDL_MS_TO_NS(50)
 
+// Determines how often to pump events if DBus is active
+#define DBUS_POLL_INTERVAL_NS (3 * SDL_NS_PER_SECOND)
+
 // Make sure the type in the SDL_Event aligns properly across the union
 SDL_COMPILE_TIME_ASSERT(SDL_Event_type, sizeof(Uint32) == sizeof(SDL_EventType));
 
@@ -1496,6 +1502,11 @@ static void SDL_PumpEventsInternal(bool push_sentinel)
     // Run any pending main thread callbacks
     SDL_RunMainThreadCallbacks();
 
+#ifdef SDL_USE_LIBDBUS
+    // DBus event processing is independent of the video subsystem
+    SDL_DBus_PumpEvents();
+#endif
+
 #ifdef SDL_PLATFORM_ANDROID
     // Android event processing is independent of the video subsystem
     Android_PumpEvents(0);
@@ -1566,6 +1577,11 @@ static Sint64 SDL_events_get_polling_interval(void)
         poll_intervalNS = SDL_min(poll_intervalNS, TRAY_POLL_INTERVAL_NS);
     }
 #endif
+
+#ifdef SDL_USE_LIBDBUS
+    // Wake periodically to pump DBus events
+    poll_intervalNS = SDL_min(poll_intervalNS, DBUS_POLL_INTERVAL_NS);
+#endif
     return poll_intervalNS;
 }
 

src/video/wayland/SDL_waylandevents.c

@@ -599,10 +599,6 @@ void Wayland_PumpEvents(SDL_VideoDevice *_this)
     }
 #endif
 
-#ifdef SDL_USE_LIBDBUS
-    SDL_DBus_PumpEvents();
-#endif
-
     // Synthesize key repeat events.
     wl_list_for_each (seat, &d->seat_list, link) {
         if (keyboard_repeat_is_set(&seat->keyboard.repeat)) {

src/video/x11/SDL_x11events.c

@@ -2271,10 +2271,6 @@ int X11_WaitEventTimeout(SDL_VideoDevice *_this, Sint64 timeoutNS)
     }
 
     X11_DispatchEvent(_this, &xevent);
-
-#ifdef SDL_USE_LIBDBUS
-    SDL_DBus_PumpEvents();
-#endif
     return 1;
 }
 
@@ -2327,10 +2323,6 @@ void X11_PumpEvents(SDL_VideoDevice *_this)
         X11_DispatchEvent(_this, &xevent);
     }
 
-#ifdef SDL_USE_LIBDBUS
-    SDL_DBus_PumpEvents();
-#endif
-
     // FIXME: Only need to do this when there are pending focus changes
     X11_HandleFocusChanges(_this);