1 files changed, 186 insertions, 0 deletions
diff --git a/vcl/unx/gtk3/a11y/atkfactory.cxx b/vcl/unx/gtk3/a11y/atkfactory.cxx
new file mode 100644
index 000000000..2fc407b7b
--- /dev/null
+++ b/vcl/unx/gtk3/a11y/atkfactory.cxx
@@ -0,0 +1,186 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <unx/gtk/gtkframe.hxx>
+#include <vcl/window.hxx>
+#include "atkwrapper.hxx"
+#include "atkfactory.hxx"
+#include "atkregistry.hxx"
+
+using namespace ::com::sun::star;
+
+extern "C" {
+
+/*
+ *  Instances of this dummy object class are returned whenever we have to
+ *  create an AtkObject, but can't touch the OOo object anymore since it
+ *  is already disposed.
+ */
+
+static AtkStateSet *
+noop_wrapper_ref_state_set( AtkObject * )
+{
+    AtkStateSet *state_set = atk_state_set_new();
+    atk_state_set_add_state( state_set, ATK_STATE_DEFUNCT );
+    return state_set;
+}
+
+static void
+atk_noop_object_wrapper_class_init(AtkNoOpObjectClass *klass)
+{
+    AtkObjectClass *atk_class = ATK_OBJECT_CLASS( klass );
+    atk_class->ref_state_set = noop_wrapper_ref_state_set;
+}
+
+static GType
+atk_noop_object_wrapper_get_type()
+{
+    static GType type = 0;
+
+    if (!type)
+    {
+        static const GTypeInfo typeInfo =
+        {
+            sizeof (AtkNoOpObjectClass),
+            nullptr,
+            nullptr,
+            reinterpret_cast<GClassInitFunc>(atk_noop_object_wrapper_class_init),
+            nullptr,
+            nullptr,
+            sizeof (AtkObjectWrapper),
+            0,
+            nullptr,
+            nullptr
+        } ;
+
+        type = g_type_register_static (ATK_TYPE_OBJECT, "OOoAtkNoOpObj", &typeInfo, GTypeFlags(0)) ;
+    }
+    return type;
+}
+
+static AtkObject*
+atk_noop_object_wrapper_new()
+{
+  AtkObject *accessible;
+
+  accessible = static_cast<AtkObject *>(g_object_new (atk_noop_object_wrapper_get_type(), nullptr));
+  g_return_val_if_fail (accessible != nullptr, nullptr);
+
+  accessible->role = ATK_ROLE_INVALID;
+  accessible->layer = ATK_LAYER_INVALID;
+
+  return accessible;
+}
+
+/*
+ * The wrapper factory
+ */
+
+static GType
+wrapper_factory_get_accessible_type()
+{
+  return atk_object_wrapper_get_type();
+}
+
+static AtkObject*
+wrapper_factory_create_accessible( GObject *obj )
+{
+    GtkWidget* pEventBox = gtk_widget_get_parent(GTK_WIDGET(obj));
+
+    // gail_container_real_remove_gtk tries to re-instantiate an accessible
+    // for a widget that is about to vanish ..
+    if (!pEventBox)
+        return atk_noop_object_wrapper_new();
+
+    GtkWidget* pTopLevelGrid = gtk_widget_get_parent(pEventBox);
+    if (!pTopLevelGrid)
+        return atk_noop_object_wrapper_new();
+
+    GtkWidget* pTopLevel = gtk_widget_get_parent(pTopLevelGrid);
+    if (!pTopLevel)
+        return atk_noop_object_wrapper_new();
+
+    GtkSalFrame* pFrame = GtkSalFrame::getFromWindow(pTopLevel);
+    g_return_val_if_fail(pFrame != nullptr, atk_noop_object_wrapper_new());
+
+    vcl::Window* pFrameWindow = pFrame->GetWindow();
+    if( pFrameWindow )
+    {
+        vcl::Window* pWindow = pFrameWindow;
+
+        // skip accessible objects already exposed by the frame objects
+        if( WindowType::BORDERWINDOW == pWindow->GetType() )
+            pWindow = pFrameWindow->GetAccessibleChildWindow(0);
+
+        if( pWindow )
+        {
+            uno::Reference< accessibility::XAccessible > xAccessible = pWindow->GetAccessible();
+            if( xAccessible.is() )
+            {
+                AtkObject *accessible = ooo_wrapper_registry_get( xAccessible );
+
+                if( accessible )
+                    g_object_ref( G_OBJECT(accessible) );
+                else
+                    accessible = atk_object_wrapper_new( xAccessible, gtk_widget_get_accessible(pTopLevel) );
+
+                return accessible;
+            }
+        }
+    }
+
+    return atk_noop_object_wrapper_new();
+}
+
+AtkObject* ooo_fixed_get_accessible(GtkWidget *obj)
+{
+    return wrapper_factory_create_accessible(G_OBJECT(obj));
+}
+
+static void
+wrapper_factory_class_init( AtkObjectFactoryClass *klass )
+{
+  klass->create_accessible   = wrapper_factory_create_accessible;
+  klass->get_accessible_type = wrapper_factory_get_accessible_type;
+}
+
+GType
+wrapper_factory_get_type()
+{
+  static GType t = 0;
+
+  if (!t) {
+    static const GTypeInfo tinfo =
+    {
+      sizeof (AtkObjectFactoryClass),
+      nullptr, nullptr, reinterpret_cast<GClassInitFunc>(wrapper_factory_class_init),
+      nullptr, nullptr, sizeof (AtkObjectFactory), 0, nullptr, nullptr
+    };
+
+    t = g_type_register_static (
+        ATK_TYPE_OBJECT_FACTORY, "OOoAtkObjectWrapperFactory",
+        &tinfo, GTypeFlags(0));
+  }
+
+  return t;
+}
+
+} // extern C
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */