From a9397b82916b535472e8c20580ee3dcaca32ff91 Mon Sep 17 00:00:00 2001
From: lkn <lkn@localhost>
Date: Sun, 7 Jun 2026 14:46:02 +0200
Subject: [PATCH] wl_unmap: force commit sibling toplevels to clear stale popup
 pixels

When a topLevel popup is unmapped, wl_redisplay(view-parent) clears stale popup pixels from the parent backing. But for rootView (common parent), the commit at the end of wl_redisplay is a no-op because rootView has no WLClientToplevel. The cleared backing was never pushed to any surface. Fix: iterate parent child list and force-commit every topLevel sibling, pushing the cleared backing to their wl_buffers.
---
 WINGs/wview_wl.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/WINGs/wview_wl.c b/WINGs/wview_wl.c
index 5bd87ac..1d65b2f 100644
--- a/WINGs/wview_wl.c
+++ b/WINGs/wview_wl.c
@@ -211,8 +211,25 @@ static void wl_unmap(void *vctx, W_View *view)
 	/* Disable the scene buffer so the view disappears from screen. */
 	if (W_ViewSceneNodeSetEnabledFn)
 		W_ViewSceneNodeSetEnabledFn((unsigned long)view->window, 0);
-	if (view->parent && view->parent->flags.mapped)
+	if (view->parent && view->parent->flags.mapped) {
 		wl_redisplay(vctx, view->parent);
+		/* Force commit of the parent backing so stale pixels from
+		 * previous composites (via wl_redisplay line 530) are cleared.
+		 * If the parent itself cannot be committed (e.g. rootView),
+		 * commit all topLevel children that have a client backing. */
+		extern void (*W_ViewCommitBackingFn)(unsigned long id);
+		if (W_ViewCommitBackingFn) {
+			W_View *parent = view->parent;
+			W_View *child = parent->childrenList;
+			while (child) {
+				if (child->flags.topLevel && child->flags.realized
+				    && child != view)
+					W_ViewCommitBackingFn(
+					    (unsigned long)child->window);
+				child = child->nextSister;
+			}
+		}
+	}
 }
 
 static void wl_unmap_subviews(void *vctx, W_View *view)