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, 9 deletions

diff --git a/gtk/gtkswitch.c b/gtk/gtkswitch.c
index 040519506e..64e9cc379b 100644
--- a/gtk/gtkswitch.c
+++ b/gtk/gtkswitch.c
@@ -69,8 +69,6 @@
 #include "gtkstylecontextprivate.h"
 #include "gtkwidgetprivate.h"
 
-#include "a11y/gtkswitchaccessible.h"
-
 typedef struct _GtkSwitchClass   GtkSwitchClass;
 
 /**
@@ -607,9 +605,6 @@ gtk_switch_class_init (GtkSwitchClass *klass)
   g_object_class_override_property (gobject_class, PROP_ACTION_NAME, "action-name");
   g_object_class_override_property (gobject_class, PROP_ACTION_TARGET, "action-target");
 
-  gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SWITCH_ACCESSIBLE);
-  gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_TOGGLE_BUTTON);
-
   gtk_widget_class_set_css_name (widget_class, I_("switch"));
 }
 
@@ -692,7 +687,6 @@ gtk_switch_set_active (GtkSwitch *self,
 
   if (self->is_active != is_active)
     {
-      AtkObject *accessible;
       gboolean handled;
 
       self->is_active = is_active;
@@ -706,9 +700,6 @@ gtk_switch_set_active (GtkSwitch *self,
 
       g_object_notify_by_pspec (G_OBJECT (self), switch_props[PROP_ACTIVE]);
 
-      accessible = gtk_widget_get_accessible (GTK_WIDGET (self));
-      atk_object_notify_state_change (accessible, ATK_STATE_CHECKED, self->is_active);
-
       gtk_widget_queue_allocate (GTK_WIDGET (self));
     }
 }