[gtksourceview] hoverassistant: dismiss assistant on scroll

[Christian Hergert <chergert src gnome org>]

commit 78a08a12b3946b7b0fcf41432ead3c9be1eeeecb
Author: Christian Hergert <chergert redhat com>
Date:   Wed Aug 31 17:59:38 2022 -0700

    hoverassistant: dismiss assistant on scroll
    
    We had this previously, and I thought we'd be able to drop it, but it is
    still needed even with autohide changes.

 gtksourceview/gtksourcehoverassistant.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/gtksourceview/gtksourcehoverassistant.c b/gtksourceview/gtksourcehoverassistant.c
index 1abe01bc..6c634c7d 100644
--- a/gtksourceview/gtksourcehoverassistant.c
+++ b/gtksourceview/gtksourcehoverassistant.c
@@ -325,11 +325,21 @@ gtk_source_hover_assistant_class_init (GtkSourceHoverAssistantClass *klass)
 static void
 gtk_source_hover_assistant_init (GtkSourceHoverAssistant *self)
 {
+       GtkEventController *scroll;
+
        gtk_widget_add_css_class (GTK_WIDGET (self), "hover-assistant");
 
        gtk_popover_set_autohide (GTK_POPOVER (self), FALSE);
        gtk_popover_set_position (GTK_POPOVER (self), GTK_POS_TOP);
 
+       scroll = gtk_event_controller_scroll_new (GTK_EVENT_CONTROLLER_SCROLL_BOTH_AXES);
+       g_signal_connect_object (scroll,
+                                "scroll",
+                                G_CALLBACK (_gtk_source_hover_assistant_dismiss),
+                                self,
+                                G_CONNECT_SWAPPED);
+       gtk_widget_add_controller (GTK_WIDGET (self), g_steal_pointer (&scroll));
+
        self->display = g_object_new (GTK_SOURCE_TYPE_HOVER_DISPLAY, NULL);
        _gtk_source_assistant_set_child (GTK_SOURCE_ASSISTANT (self), GTK_WIDGET (self->display));