From 5c6d2c8e870b7b99f57cfeefe3f0895c760fd562 Mon Sep 17 00:00:00 2001
From: hrdl <7808331-hrdl@users.noreply.gitlab.com>
Date: Sun, 15 May 2022 22:48:22 +0200
Subject: [PATCH 1/2] Fixes incorrect grabbing behaviour causing subsequent
 rejection of input

mouse_location can be set to NULL in gtk_range_update_mouse_location(). This
causes a match with stepper_?_gadget in gtk_range_multipress_gesture_pressed(),
as both are NULL. This leads to a grab being added internally and as well, a
critical error message, and a subsequent rejection of touch inputs. Returning
early when mouse_location is NULL prevents this.

Closes #4947
---
 gtk/gtkrange.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gtk/gtkrange.c b/gtk/gtkrange.c
index 774174df52..b52a21017b 100644
--- a/gtk/gtkrange.c
+++ b/gtk/gtkrange.c
@@ -2711,6 +2711,11 @@ gtk_range_multipress_gesture_pressed (GtkGestureMultiPress *gesture,
   priv->mouse_y = y;
 
   gtk_range_update_mouse_location (range);
+  if (!priv->mouse_location)
+    {
+      g_warning(G_STRLOC "value of mouse_location is 'NULL'");
+      return;
+    }
   gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
 
   g_object_get (gtk_widget_get_settings (widget),

From 15f0ac6f93d1581fe38d9c6bbd4ca64926bbc1f8 Mon Sep 17 00:00:00 2001
From: hrdl <79064-hrdl@users.noreply.gitlab.gnome.org>
Date: Sat, 28 Jan 2023 14:20:49 +0100
Subject: [PATCH 2/2] Remove warning

---
 gtk/gtkrange.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/gtk/gtkrange.c b/gtk/gtkrange.c
index b52a21017b..f53e08434d 100644
--- a/gtk/gtkrange.c
+++ b/gtk/gtkrange.c
@@ -2712,10 +2712,8 @@ gtk_range_multipress_gesture_pressed (GtkGestureMultiPress *gesture,
 
   gtk_range_update_mouse_location (range);
   if (!priv->mouse_location)
-    {
-      g_warning(G_STRLOC "value of mouse_location is 'NULL'");
-      return;
-    }
+    return;
+
   gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
 
   g_object_get (gtk_widget_get_settings (widget),