From b19d708a6820a5657bfc4be1275cef7eca6e0cc0 Mon Sep 17 00:00:00 2001
From: Romain Vimont <rom@rom1v.com>
Date: Tue, 12 May 2020 22:30:37 +0200
Subject: [PATCH] Workaround maximized+fullscreen on Windows

On Windows, in maximized+fullscreen state, disabling fullscreen mode
unexpectedly triggers the "restored" then "maximized" events, leaving
the window in a weird state (maximized according to the events, but not
maximized visually).

Moreover, apply_pending_resize() asserts that fullscreen is disabled.

To avoid the issue, if fullscreen is set, just ignore the "restored"
event.
---
 app/src/screen.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/app/src/screen.c b/app/src/screen.c
index 5c1c0a93b6..869ae0e0db 100644
--- a/app/src/screen.c
+++ b/app/src/screen.c
@@ -531,6 +531,13 @@ screen_handle_window_event(struct screen *screen,
             screen->maximized = true;
             break;
         case SDL_WINDOWEVENT_RESTORED:
+            if (screen->fullscreen) {
+                // On Windows, in maximized+fullscreen, disabling fullscreen
+                // mode unexpectedly triggers the "restored" then "maximized"
+                // events, leaving the window in a weird state (maximized
+                // according to the events, but not maximized visually).
+                break;
+            }
             screen->maximized = false;
             apply_pending_resize(screen);
             break;