1 files changed, 95 insertions, 0 deletions
diff --git a/accessible/ipc/win/handler/HandlerDataCleanup.h b/accessible/ipc/win/handler/HandlerDataCleanup.h
new file mode 100644
index 0000000000..14d9995c19
--- /dev/null
+++ b/accessible/ipc/win/handler/HandlerDataCleanup.h
@@ -0,0 +1,95 @@
+/* -*- 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/. */
+
+#ifndef mozilla_a11y_HandlerDataCleanup_h
+#define mozilla_a11y_HandlerDataCleanup_h
+
+#include <oleauto.h>
+
+namespace mozilla {
+namespace a11y {
+
+inline void ReleaseStaticIA2DataInterfaces(StaticIA2Data& aData) {
+  // Only interfaces of the proxied object wrapped by this handler should be
+  // released here, never other objects!
+  // For example, if StaticIA2Data were to include accParent in future,
+  // that must not be released here.
+  if (aData.mIA2) {
+    aData.mIA2->Release();
+  }
+  if (aData.mIAHypertext) {
+    aData.mIAHypertext->Release();
+  }
+  if (aData.mIAHyperlink) {
+    aData.mIAHyperlink->Release();
+  }
+  if (aData.mIATable) {
+    aData.mIATable->Release();
+  }
+  if (aData.mIATable2) {
+    aData.mIATable2->Release();
+  }
+  if (aData.mIATableCell) {
+    aData.mIATableCell->Release();
+  }
+}
+
+/**
+ * Pass true for aMarshaledByCom  if this struct was directly marshaled as an
+ * out parameter of a COM method, currently only IGeckoBackChannel::Refresh.
+ */
+inline void CleanupDynamicIA2Data(DynamicIA2Data& aData,
+                                  bool aMarshaledByCom = false) {
+  // If freeing generic memory returned to the client, you *must* use freeMem,
+  // not CoTaskMemFree!
+  auto freeMem = [aMarshaledByCom](void* aMem) {
+    if (aMarshaledByCom) {
+      ::CoTaskMemFree(aMem);
+    } else {
+      ::midl_user_free(aMem);
+    }
+  };
+
+  ::VariantClear(&aData.mRole);
+  if (aData.mKeyboardShortcut) {
+    ::SysFreeString(aData.mKeyboardShortcut);
+  }
+  if (aData.mName) {
+    ::SysFreeString(aData.mName);
+  }
+  if (aData.mDescription) {
+    ::SysFreeString(aData.mDescription);
+  }
+  if (aData.mDefaultAction) {
+    ::SysFreeString(aData.mDefaultAction);
+  }
+  if (aData.mValue) {
+    ::SysFreeString(aData.mValue);
+  }
+  if (aData.mAttributes) {
+    ::SysFreeString(aData.mAttributes);
+  }
+  if (aData.mIA2Locale.language) {
+    ::SysFreeString(aData.mIA2Locale.language);
+  }
+  if (aData.mIA2Locale.country) {
+    ::SysFreeString(aData.mIA2Locale.country);
+  }
+  if (aData.mIA2Locale.variant) {
+    ::SysFreeString(aData.mIA2Locale.variant);
+  }
+  if (aData.mRowHeaderCellIds) {
+    freeMem(aData.mRowHeaderCellIds);
+  }
+  if (aData.mColumnHeaderCellIds) {
+    freeMem(aData.mColumnHeaderCellIds);
+  }
+}
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif  // mozilla_a11y_HandlerDataCleanup_h