From c255031b6d66b692964e6058363e4fd1a69a2857 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20M=C3=BCllner?= <fmuellner@gnome.org>
Date: Mon, 18 Jan 2021 20:14:15 +0100
Subject: [PATCH] events: Bypass wayland when scrolling with mouse-button
 modifier pressed

<super> is considered a system modifier, and applications cannot use it
for keyboard shortcuts or as button modifier. It doesn't seem too much
of a loss taking <super>+scroll-event away as well, so that it becomes
available to gnome-shell/extensions.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1674>
---
 src/core/events.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/core/events.c b/src/core/events.c
index c93e16fce..f75e53829 100644
--- a/src/core/events.c
+++ b/src/core/events.c
@@ -269,6 +269,18 @@ meta_display_handle_event (MetaDisplay        *display,
         }
     }
 
+  if (event->type == CLUTTER_SCROLL && meta_prefs_get_mouse_button_mods () > 0)
+    {
+      ClutterModifierType grab_mods;
+
+      grab_mods = meta_display_get_window_grab_modifiers (display);
+      if ((clutter_event_get_state (event) & grab_mods) != 0)
+        {
+          bypass_wayland = TRUE;
+          goto out;
+        }
+    }
+
   if (event->type != CLUTTER_DEVICE_ADDED &&
       event->type != CLUTTER_DEVICE_REMOVED)
     {