commit 86c66b02a69560b032d978b11c60f5524ba417e4
from: Stefan Sperling <stsp@stsp.name>
date: Thu Oct 18 09:11:12 2018 UTC

allow only one parent view per type in tog

commit - c0d30c230201ac93afae8ccdccb2d4a167aa5e54
commit + 86c66b02a69560b032d978b11c60f5524ba417e4
blob - 207301ac4b20e2a7e056c0d7c4088400c12ec792
blob + a9cdcb7e8b48cb53470643edfee2b4177b528ac2
--- tog/tog.c
+++ tog/tog.c
@@ -602,6 +602,19 @@ view_loop(struct tog_view *view)
 			}
 		}
 		if (new_view) {
+			struct tog_view *v, *t;
+			/* Only allow one parent view per type. */
+			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
+				if (v->type != new_view->type)
+					continue;
+				TAILQ_REMOVE(&views, v, entry);
+				err = view_close(v);
+				if (err)
+					goto done;
+				if (v == view)
+					view = new_view;
+				break;
+			}
 			TAILQ_INSERT_TAIL(&views, new_view, entry);
 			if (focus_view == NULL)
 				focus_view = new_view;