[libhandy/wip/exalm/alpha-fixes: 7/8] tab-box: Handle middle click on release instead of press

[Alexander Mikhaylenko <alexm src gnome org>]

commit 874fb9bec09d4ce84e667d97a62db3d097b31835
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Fri Nov 12 00:43:04 2021 +0500

    tab-box: Handle middle click on release instead of press
    
    Fixes https://gitlab.gnome.org/GNOME/libadwaita/-/issues/294
    
    Backported from 
https://gitlab.gnome.org/GNOME/libadwaita/-/commit/4e2ef2f5fd048afdb9f8a8866b55f389655db773

 src/hdy-tab-box.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)
---
diff --git a/src/hdy-tab-box.c b/src/hdy-tab-box.c
index 7953568d..14253107 100644
--- a/src/hdy-tab-box.c
+++ b/src/hdy-tab-box.c
@@ -2909,12 +2909,6 @@ hdy_tab_box_button_press_event (GtkWidget      *widget,
 
   self->pressed_button = event->button;
 
-  if (self->pressed_button == GDK_BUTTON_MIDDLE) {
-    hdy_tab_view_close_page (self->view, self->pressed_tab->page);
-
-    return GDK_EVENT_STOP;
-  }
-
   if (self->pressed_button != GDK_BUTTON_PRIMARY)
     return GDK_EVENT_PROPAGATE;
 
@@ -2961,13 +2955,20 @@ hdy_tab_box_button_release_event (GtkWidget      *widget,
                                   GdkEventButton *event)
 {
   HdyTabBox *self = HDY_TAB_BOX (widget);
+  gboolean ret = GDK_EVENT_PROPAGATE;
+
+  if (self->pressed_button == GDK_BUTTON_MIDDLE) {
+    hdy_tab_view_close_page (self->view, self->pressed_tab->page);
+
+    ret = GDK_EVENT_STOP;
+  }
 
   self->pressed = FALSE;
   self->pressed_button = 0;
 
   end_dragging (self);
 
-  return GDK_EVENT_PROPAGATE;
+  return ret;
 }
 
 static gboolean