1 files changed, 35 insertions, 0 deletions
diff --git a/accessible/generic/ARIAGridAccessible-inl.h b/accessible/generic/ARIAGridAccessible-inl.h
new file mode 100644
index 0000000000..5ed73c2c5c
--- /dev/null
+++ b/accessible/generic/ARIAGridAccessible-inl.h
@@ -0,0 +1,35 @@
+/* -*- 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/. */
+
+#ifndef mozilla_a11y_ARIAGridAccessible_inl_h__
+#define mozilla_a11y_ARIAGridAccessible_inl_h__
+
+#include "ARIAGridAccessible.h"
+
+#include "AccIterator.h"
+#include "nsAccUtils.h"
+
+namespace mozilla {
+namespace a11y {
+
+inline int32_t ARIAGridCellAccessible::RowIndexFor(Accessible* aRow) const {
+  Accessible* table = nsAccUtils::TableFor(aRow);
+  if (table) {
+    int32_t rowIdx = 0;
+    Accessible* row = nullptr;
+    AccIterator rowIter(table, filters::GetRow);
+    while ((row = rowIter.Next()) && row != aRow) rowIdx++;
+
+    if (row) return rowIdx;
+  }
+
+  return -1;
+}
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif