xwayland: receive DND_FINISHED

xwayland/selection.c

@@ -1015,6 +1015,41 @@ int xwm_handle_selection_client_message(struct wlr_xwm *xwm,
 		wlr_log(L_DEBUG, "DND_STATUS window=%d accepted=%d action=%d",
 			target_window, accepted, action);
 		return 1;
+	} else if (ev->type == xwm->atoms[DND_FINISHED]) {
+		// This should only happen after the drag has ended, but before the drag
+		// source is destroyed
+		if (xwm->seat == NULL || xwm->seat->drag_source == NULL ||
+				xwm->drag != NULL) {
+			wlr_log(L_DEBUG, "ignoring XdndFinished client message because "
+				"there's no finished drag");
+			return 1;
+		}
+
+		xcb_client_message_data_t *data = &ev->data;
+		xcb_window_t target_window = data->data32[0];
+		bool performed = data->data32[1] & 1;
+		xcb_atom_t action_atom = data->data32[2];
+
+		if (xwm->drag_focus == NULL ||
+				target_window != xwm->drag_focus->window_id) {
+			wlr_log(L_DEBUG, "ignoring XdndFinished client message because "
+				"it doesn't match the finished drag focus window ID");
+			return 1;
+		}
+
+		enum wl_data_device_manager_dnd_action action =
+			data_device_manager_dnd_action_from_atom(xwm, action_atom);
+
+		if (performed) {
+			struct wlr_data_source *source = xwm->seat->drag_source;
+			if (source->dnd_finish) {
+				source->dnd_finish(source);
+			}
+		}
+
+		wlr_log(L_DEBUG, "DND_FINISH window=%d performed=%d action=%d",
+			target_window, performed, action);
+		return 1;
 	} else {
 		return 0;
 	}
@@ -1204,7 +1239,8 @@ static void seat_handle_drag_destroy(struct wl_listener *listener, void *data) {
 
 	// Don't reset drag focus yet because the target will read the drag source
 	// right after
-	if (xwm->drag_focus != NULL) {
+	if (xwm->drag_focus != NULL && !xwm->drag->source->accepted) {
+		wlr_log(L_DEBUG, "Wayland drag cancelled over an Xwayland window");
 		xwm_dnd_send_leave(xwm);
 	}