a11y: Pass on platform changes

Add an enum for 'platform changes' to the at context
change notification mechanism. This will let us pass
along things that ARIA considers 'platform state' such
as focus or editability. The difference between the
platform state and other ARIA states is that we don't
keep the platform state separately in the at context
- backends are expected to just query the widgets.

This is just about avoiding notify listeners for
change notification.

1 files changed, 13 insertions, 1 deletions

diff --git a/gtk/gtkatcontext.c b/gtk/gtkatcontext.c
index 085bf989b2..121951ab9d 100644
--- a/gtk/gtkatcontext.c
+++ b/gtk/gtkatcontext.c
@@ -36,6 +36,7 @@
 #include "gtkatcontextprivate.h"
 
 #include "gtkaccessiblevalueprivate.h"
+#include "gtkaccessibleprivate.h"
 #include "gtkdebug.h"
 #include "gtktestatcontextprivate.h"
 #include "gtktypebuiltins.h"
@@ -137,6 +138,7 @@ gtk_at_context_real_state_change (GtkATContext                *self,
                                   GtkAccessibleStateChange     changed_states,
                                   GtkAccessiblePropertyChange  changed_properties,
                                   GtkAccessibleRelationChange  changed_relations,
+                                  GtkAccessiblePlatformChange  changed_platform,
                                   GtkAccessibleAttributeSet   *states,
                                   GtkAccessibleAttributeSet   *properties,
                                   GtkAccessibleAttributeSet   *relations)
@@ -505,7 +507,8 @@ gtk_at_context_update (GtkATContext *self)
   /* There's no point in notifying of state changes if there weren't any */
   if (self->updated_properties == 0 &&
       self->updated_relations == 0 &&
-      self->updated_states == 0)
+      self->updated_states == 0 &&
+      self->updated_platform == 0)
     return;
 
   GtkAccessibleStateChange changed_states =
@@ -517,12 +520,14 @@ gtk_at_context_update (GtkATContext *self)
 
   GTK_AT_CONTEXT_GET_CLASS (self)->state_change (self,
                                                  changed_states, changed_properties, changed_relations,
+                                                 self->updated_platform,
                                                  self->states, self->properties, self->relations);
   g_signal_emit (self, obj_signals[STATE_CHANGE], 0);
 
   self->updated_properties = 0;
   self->updated_relations = 0;
   self->updated_states = 0;
+  self->updated_platform = 0;
 }
 
 /*< private >
@@ -806,3 +811,10 @@ gtk_at_context_get_label (GtkATContext *self)
 
   return g_strdup ("widget");
 }
+
+void
+gtk_at_context_platform_changed (GtkATContext                *self,
+                                 GtkAccessiblePlatformChange  change)
+{
+  self->updated_platform |= change;
+}