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, 6 deletions

diff --git a/gtk/gtkstylecontextprivate.h b/gtk/gtkstylecontextprivate.h
index b902bb5b99..09fde7ce11 100644
--- a/gtk/gtkstylecontextprivate.h
+++ b/gtk/gtkstylecontextprivate.h
@@ -26,8 +26,6 @@
 #include "gtkbitmaskprivate.h"
 #include "gtkcssvalueprivate.h"
 
-#include <atk/atk.h>
-
 G_BEGIN_DECLS
 
 GtkStyleContext *gtk_style_context_new_for_node              (GtkCssNode      *node);
@@ -46,10 +44,6 @@ void           _gtk_style_context_get_cursor_color           (GtkStyleContext
                                                               GdkRGBA            *primary_color,
                                                               GdkRGBA            *secondary_color);
 
-/* Accessibility support */
-AtkAttributeSet *_gtk_style_context_get_attributes           (AtkAttributeSet    *attributes,
-                                                              GtkStyleContext    *context);
-
 G_END_DECLS
 
 #endif /* __GTK_STYLE_CONTEXT_PRIVATE_H__ */