diff -r 000000000000 -r 6474c204b198 accessible/src/atk/nsMaiInterfaceSelection.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/accessible/src/atk/nsMaiInterfaceSelection.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,113 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#include "InterfaceInitFuncs.h"
+
+#include "Accessible-inl.h"
+#include "AccessibleWrap.h"
+#include "nsMai.h"
+#include "mozilla/Likely.h"
+
+#include <atk/atk.h>
+
+using namespace mozilla::a11y;
+
+extern "C" {
+
+static gboolean
+addSelectionCB(AtkSelection *aSelection, gint i)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
+  if (!accWrap || !accWrap->IsSelect())
+    return FALSE;
+
+  return accWrap->AddItemToSelection(i);
+}
+
+static gboolean
+clearSelectionCB(AtkSelection *aSelection)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
+  if (!accWrap || !accWrap->IsSelect())
+    return FALSE;
+
+  return accWrap->UnselectAll();
+}
+
+static AtkObject*
+refSelectionCB(AtkSelection *aSelection, gint i)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
+  if (!accWrap || !accWrap->IsSelect())
+    return nullptr;
+
+  Accessible* selectedItem = accWrap->GetSelectedItem(i);
+  if (!selectedItem)
+    return nullptr;
+
+  AtkObject* atkObj = AccessibleWrap::GetAtkObject(selectedItem);
+  if (atkObj)
+    g_object_ref(atkObj);
+
+  return atkObj;
+}
+
+static gint
+getSelectionCountCB(AtkSelection *aSelection)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
+  if (!accWrap || !accWrap->IsSelect())
+    return -1;
+
+  return accWrap->SelectedItemCount();
+}
+
+static gboolean
+isChildSelectedCB(AtkSelection *aSelection, gint i)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
+  if (!accWrap || !accWrap->IsSelect())
+    return FALSE;
+
+  return accWrap->IsItemSelected(i);
+}
+
+static gboolean
+removeSelectionCB(AtkSelection *aSelection, gint i)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
+  if (!accWrap || !accWrap->IsSelect())
+    return FALSE;
+
+  return accWrap->RemoveItemFromSelection(i);
+}
+
+static gboolean
+selectAllSelectionCB(AtkSelection *aSelection)
+{
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
+  if (!accWrap || !accWrap->IsSelect())
+    return FALSE;
+
+  return accWrap->SelectAll();
+}
+}
+
+void
+selectionInterfaceInitCB(AtkSelectionIface* aIface)
+{
+  NS_ASSERTION(aIface, "Invalid aIface");
+  if (MOZ_UNLIKELY(!aIface))
+    return;
+
+  aIface->add_selection = addSelectionCB;
+  aIface->clear_selection = clearSelectionCB;
+  aIface->ref_selection = refSelectionCB;
+  aIface->get_selection_count = getSelectionCountCB;
+  aIface->is_child_selected = isChildSelectedCB;
+  aIface->remove_selection = removeSelectionCB;
+  aIface->select_all_selection = selectAllSelectionCB;
+}