1 files changed, 51 insertions, 0 deletions
diff --git a/accessible/ipc/win/handler/HandlerChildEnumerator.h b/accessible/ipc/win/handler/HandlerChildEnumerator.h
new file mode 100644
index 0000000000..df0218c6ed
--- /dev/null
+++ b/accessible/ipc/win/handler/HandlerChildEnumerator.h
@@ -0,0 +1,51 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=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/. */
+
+#if defined(MOZILLA_INTERNAL_API)
+#  error This code is NOT for internal Gecko use!
+#endif  // defined(MOZILLA_INTERNAL_API)
+
+#ifndef mozilla_a11y_HandlerChildEnumerator_h
+#  define mozilla_a11y_HandlerChildEnumerator_h
+
+#  include "AccessibleHandler.h"
+#  include "IUnknownImpl.h"
+#  include "mozilla/RefPtr.h"
+
+namespace mozilla {
+namespace a11y {
+
+class HandlerChildEnumerator final : public IEnumVARIANT {
+ public:
+  explicit HandlerChildEnumerator(AccessibleHandler* aHandler,
+                                  IGeckoBackChannel* aGeckoBackChannel);
+
+  DECL_IUNKNOWN
+
+  // IEnumVARIANT
+  STDMETHODIMP Clone(IEnumVARIANT** aPpEnum) override;
+  STDMETHODIMP Next(ULONG aCelt, VARIANT* aRgVar,
+                    ULONG* aPCeltFetched) override;
+  STDMETHODIMP Reset() override;
+  STDMETHODIMP Skip(ULONG aCelt) override;
+
+ private:
+  explicit HandlerChildEnumerator(const HandlerChildEnumerator& aEnumerator);
+  ~HandlerChildEnumerator();
+  void ClearCache();
+  HRESULT MaybeCacheChildren();
+
+  RefPtr<AccessibleHandler> mHandler;
+  RefPtr<IGeckoBackChannel> mGeckoBackChannel;
+  UniquePtr<VARIANT[]> mChildren;
+  ULONG mChildCount;
+  ULONG mNextChild;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif  // mozilla_a11y_HandlerChildEnumerator_h