SDL: wayland: Remove focus references when a pointer capture ends on a subsurface

SDL Commits
1 
From 0a96d47599838c2aa36cc6dad9395acb33189539 Mon Sep 17 00:00:00 2001
From: Frank Praznik <[EMAIL REDACTED]>
Date: Sat, 23 May 2026 12:20:30 -0400
Subject: [PATCH] wayland: Remove focus references when a pointer capture ends
 on a subsurface

The core mouse code will unfocus the window when a capture ends outside the window boundaries, but the backend still needs to update the internal focus references.
---
 src/video/wayland/SDL_waylandevents.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/video/wayland/SDL_waylandevents.c b/src/video/wayland/SDL_waylandevents.c
index 67f74fe5d1afa..82369b876b043 100644
--- a/src/video/wayland/SDL_waylandevents.c
+++ b/src/video/wayland/SDL_waylandevents.c
@@ -1048,6 +1048,11 @@ static void pointer_dispatch_button(SDL_WaylandSeat *seat, Uint8 sdl_button, boo
                 window->sdlwindow->flags |= SDL_WINDOW_MOUSE_CAPTURE;
             } else {
                 window->sdlwindow->flags &= ~SDL_WINDOW_MOUSE_CAPTURE;
+
+                // If ending the capture on a subsurface, dispatch a leave event to remove focus.
+                if (seat->pointer.focus_surface != window->surface) {
+                    seat->pointer.pending_frame.leave_surface = window->surface;
+                }
             }
         }