Remove ATK

To build a better world sometimes means having to tear the old one down.
        -- Alexander Pierce, "Captain America: The Winter Soldier"

ATK served us well for nearly 20 years, but the world has changed, and
GTK has changed with it. Now ATK is mostly a hindrance towards improving
the accessibility stack:

 - it maps to a very specific implementation, AT-SPI, which is Linux and
   Unix specific
 - it requires implementing the same functionality in three different
   layers of the stack: AT-SPI, ATK, and GTK
 - only GTK uses it; every other Linux and Unix toolkit and application
   talks to AT-SPI directly, including assistive technologies

Sadly, we cannot incrementally port GTK to a new accessibility stack;
since ATK insulates us entirely from the underlying implementation, we
cannot replace it piecemeal. Instead, we're going to remove everything
and then incrementally build on a clean slate:

 - add an "accessible" interface, implemented by GTK objects directly,
   which describe the accessible role and state changes for every UI
   element
 - add an "assistive technology context" to proxy a native accessibility
   API, and assign it to every widget
 - implement the AT context depending on the platform

For more information, see: https://gitlab.gnome.org/GNOME/gtk/-/issues/2833

1 files changed, 0 insertions, 3 deletions

diff --git a/gtk/gtkscale.c b/gtk/gtkscale.c
index 3c8056e635..5acc0fc8dc 100644
--- a/gtk/gtkscale.c
+++ b/gtk/gtkscale.c
@@ -43,8 +43,6 @@
 #include "gtktypebuiltins.h"
 #include "gtkwidgetprivate.h"
 
-#include "a11y/gtkscaleaccessible.h"
-
 #include <math.h>
 #include <stdlib.h>
 
@@ -817,7 +815,6 @@ gtk_scale_class_init (GtkScaleClass *class)
   add_slider_binding (binding_set, GDK_KEY_KP_End, 0,
                       GTK_SCROLL_END);
 
-  gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SCALE_ACCESSIBLE);
   gtk_widget_class_set_css_name (widget_class, I_("scale"));
 }