diff -r 000000000000 -r 6474c204b198 accessible/src/xpcom/xpcAccessibleSelectable.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/accessible/src/xpcom/xpcAccessibleSelectable.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,134 @@
+/* -*- 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 "xpcAccessibleSelectable.h"
+
+#include "Accessible-inl.h"
+
+using namespace mozilla::a11y;
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::GetSelectedItems(nsIArray** aSelectedItems)
+{
+  NS_ENSURE_ARG_POINTER(aSelectedItems);
+  *aSelectedItems = nullptr;
+
+  Accessible* acc = static_cast<Accessible*>(this);
+  if (acc->IsDefunct())
+    return NS_ERROR_FAILURE;
+  NS_PRECONDITION(acc->IsSelect(), "Called on non selectable widget!");
+
+  nsCOMPtr<nsIArray> items = acc->SelectedItems();
+  if (items) {
+    uint32_t length = 0;
+    items->GetLength(&length);
+    if (length)
+      items.swap(*aSelectedItems);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::GetSelectedItemCount(uint32_t* aSelectionCount)
+{
+  NS_ENSURE_ARG_POINTER(aSelectionCount);
+  *aSelectionCount = 0;
+
+  Accessible* acc = static_cast<Accessible*>(this);
+  if (acc->IsDefunct())
+    return NS_ERROR_FAILURE;
+  NS_PRECONDITION(acc->IsSelect(), "Called on non selectable widget!");
+
+  *aSelectionCount = acc->SelectedItemCount();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::GetSelectedItemAt(uint32_t aIndex,
+                                           nsIAccessible** aSelected)
+{
+  NS_ENSURE_ARG_POINTER(aSelected);
+  *aSelected = nullptr;
+
+  Accessible* acc = static_cast<Accessible*>(this);
+  if (acc->IsDefunct())
+    return NS_ERROR_FAILURE;
+  NS_PRECONDITION(acc->IsSelect(), "Called on non selectable widget!");
+
+  *aSelected = acc->GetSelectedItem(aIndex);
+  if (*aSelected) {
+    NS_ADDREF(*aSelected);
+    return NS_OK;
+  }
+
+  return NS_ERROR_INVALID_ARG;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::ScriptableIsItemSelected(uint32_t aIndex,
+                                                  bool* aIsSelected)
+{
+  NS_ENSURE_ARG_POINTER(aIsSelected);
+  *aIsSelected = false;
+
+  Accessible* acc = static_cast<Accessible*>(this);
+  if (acc->IsDefunct())
+    return NS_ERROR_FAILURE;
+  NS_PRECONDITION(acc->IsSelect(), "Called on non selectable widget!");
+
+  *aIsSelected = acc->IsItemSelected(aIndex);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::ScriptableAddItemToSelection(uint32_t aIndex)
+{
+  Accessible* acc = static_cast<Accessible*>(this);
+  if (acc->IsDefunct())
+    return NS_ERROR_FAILURE;
+  NS_PRECONDITION(acc->IsSelect(), "Called on non selectable widget!");
+
+  return acc->AddItemToSelection(aIndex) ? NS_OK : NS_ERROR_INVALID_ARG;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::ScriptableRemoveItemFromSelection(uint32_t aIndex)
+{
+  Accessible* acc = static_cast<Accessible*>(this);
+  if (acc->IsDefunct())
+    return NS_ERROR_FAILURE;
+  NS_PRECONDITION(acc->IsSelect(), "Called on non selectable widget!");
+
+  return acc->RemoveItemFromSelection(aIndex) ? NS_OK : NS_ERROR_INVALID_ARG;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::ScriptableSelectAll(bool* aIsMultiSelect)
+{
+  NS_ENSURE_ARG_POINTER(aIsMultiSelect);
+  *aIsMultiSelect = false;
+
+  Accessible* acc = static_cast<Accessible*>(this);
+  if (acc->IsDefunct())
+    return NS_ERROR_FAILURE;
+  NS_PRECONDITION(acc->IsSelect(), "Called on non selectable widget!");
+
+  *aIsMultiSelect = acc->SelectAll();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+xpcAccessibleSelectable::ScriptableUnselectAll()
+{
+  Accessible* acc = static_cast<Accessible*>(this);
+  if (acc->IsDefunct())
+    return NS_ERROR_FAILURE;
+  NS_PRECONDITION(acc->IsSelect(), "Called on non selectable widget!");
+
+  acc->UnselectAll();
+  return NS_OK;
+}