[gtk/a11y/atspi] spinbutton: Implement GtkAccessible

[Matthias Clasen <matthiasc src gnome org>]

commit 76b87272a6fc48384405a17a55761b44f535cbe5
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Oct 12 21:34:16 2020 -0400

    spinbutton: Implement GtkAccessible
    
    This copies what was done for GtkEntry: get
    the focused state from the GtkText within.
    
    We also add a private getter for the text widget,
    which was missing here.

 gtk/gtkspinbutton.c        | 38 ++++++++++++++++++++++++++++++++++++++
 gtk/gtkspinbuttonprivate.h | 27 +++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)
---
diff --git a/gtk/gtkspinbutton.c b/gtk/gtkspinbutton.c
index b0cbfcf852..b0ff1672f0 100644
--- a/gtk/gtkspinbutton.c
+++ b/gtk/gtkspinbutton.c
@@ -29,6 +29,9 @@
 
 #include "gtkspinbutton.h"
 
+#include "gtkspinbuttonprivate.h"
+
+#include "gtkaccessibleprivate.h"
 #include "gtkadjustment.h"
 #include "gtkbox.h"
 #include "gtkbutton.h"
@@ -305,12 +308,15 @@ static void gtk_spin_button_default_output (GtkSpinButton      *spin_button);
 
 static void gtk_spin_button_update_width_chars (GtkSpinButton *spin_button);
 
+static void gtk_spin_button_accessible_init (GtkAccessibleInterface *iface);
 
 static guint spinbutton_signals[LAST_SIGNAL] = {0};
 static GParamSpec *spinbutton_props[NUM_SPINBUTTON_PROPS] = {NULL, };
 
 G_DEFINE_TYPE_WITH_CODE (GtkSpinButton, gtk_spin_button, GTK_TYPE_WIDGET,
                          G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL)
+                         G_IMPLEMENT_INTERFACE (GTK_TYPE_ACCESSIBLE,
+                                                gtk_spin_button_accessible_init)
                          G_IMPLEMENT_INTERFACE (GTK_TYPE_EDITABLE,
                                                 gtk_spin_button_editable_init)
                          G_IMPLEMENT_INTERFACE (GTK_TYPE_CELL_EDITABLE,
@@ -572,6 +578,31 @@ gtk_spin_button_editable_init (GtkEditableInterface *iface)
   iface->insert_text = gtk_spin_button_insert_text;
 }
 
+static gboolean
+gtk_spin_button_accessible_get_platform_state (GtkAccessible              *self,
+                                               GtkAccessiblePlatformState  state)
+{
+  GtkSpinButton *spin_button = GTK_SPIN_BUTTON (self);
+
+  switch (state)
+    {
+    case GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSABLE:
+      return gtk_widget_get_focusable (spin_button->entry);
+    case GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSED:
+      return gtk_widget_has_focus (spin_button->entry);
+    default:
+      g_assert_not_reached ();
+    }
+}
+
+static void
+gtk_spin_button_accessible_init (GtkAccessibleInterface *iface)
+{
+  GtkAccessibleInterface *parent_iface = g_type_interface_peek_parent (iface);
+  iface->get_at_context = parent_iface->get_at_context;
+  iface->get_platform_state = gtk_spin_button_accessible_get_platform_state;
+}
+
 static void
 gtk_cell_editable_spin_button_activated (GtkText *text, GtkSpinButton *spin)
 {
@@ -2310,3 +2341,10 @@ gtk_spin_button_update (GtkSpinButton *spin_button)
   else
     gtk_spin_button_set_value (spin_button, val);
 }
+
+GtkText *
+gtk_spin_button_get_text_widget (GtkSpinButton *spin_button)
+{
+  return GTK_TEXT (spin_button->entry);
+}
+
diff --git a/gtk/gtkspinbuttonprivate.h b/gtk/gtkspinbuttonprivate.h
new file mode 100644
index 0000000000..2a83077faa
--- /dev/null
+++ b/gtk/gtkspinbuttonprivate.h
@@ -0,0 +1,27 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2020 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <gtk/gtkspinbutton.h>
+#include <gtk/gtktext.h>
+
+G_BEGIN_DECLS
+
+GtkText *gtk_spin_button_get_text_widget (GtkSpinButton *spin_button);
+
+G_END_DECLS