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, 18 deletions

diff --git a/gtk/gtkexpander.c b/gtk/gtkexpander.c
index a5864d5f47..7993e506d4 100644
--- a/gtk/gtkexpander.c
+++ b/gtk/gtkexpander.c
@@ -126,8 +126,6 @@
 #include "gtkstylecontextprivate.h"
 #include "gtkwidgetprivate.h"
 
-#include "a11y/gtkexpanderaccessibleprivate.h"
-
 #include <string.h>
 
 #define TIMEOUT_EXPAND 500
@@ -375,7 +373,6 @@ gtk_expander_class_init (GtkExpanderClass *klass)
                   NULL,
                   G_TYPE_NONE, 0);
 
-  gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_EXPANDER_ACCESSIBLE);
   gtk_widget_class_set_css_name (widget_class, I_("expander-widget"));
 }
 
@@ -880,14 +877,6 @@ gtk_expander_set_expanded (GtkExpander *expander,
       gtk_expander_resize_toplevel (expander);
     }
 
-  {
-    AtkObject *accessible = _gtk_widget_peek_accessible (GTK_WIDGET (expander));
-
-    if (accessible != NULL)
-      gtk_expander_accessible_update_state (GTK_EXPANDER_ACCESSIBLE (accessible),
-                                            expander->expanded);
-  }
-
   g_object_notify (G_OBJECT (expander), "expanded");
 }
 
@@ -941,13 +930,6 @@ gtk_expander_set_label (GtkExpander *expander,
       gtk_expander_set_label_widget (expander, child);
     }
 
-  {
-    AtkObject *accessible = _gtk_widget_peek_accessible (GTK_WIDGET (expander));
-
-    if (accessible != NULL)
-      gtk_expander_accessible_update_label (GTK_EXPANDER_ACCESSIBLE (accessible));
-  }
-
   g_object_notify (G_OBJECT (expander), "label");
 }