Introduce comphelper::Automation::AutomationInvokedZone

Enables finding out anywhere whether the thread is processing a call
from an Automation client. Not sure how I have managed without this
until now.

Presumably the Invocation_Impl::mbFromOLE variable in stoc can be
replaced by a call of comphelper::Automation::AutomationInvokedZone::
isActive().

Change-Id: Ib79ec5f6dff17af25c8539d2907c7cd5d7b9a62c
(cherry picked from commit 08259ed73142e8644f8e254644d2e18487a66855)

1 files changed, 39 insertions, 0 deletions

diff --git a/include/comphelper/automationinvokedzone.hxx b/include/comphelper/automationinvokedzone.hxx
new file mode 100644
index 000000000000..13b674efa7e1
--- /dev/null
+++ b/include/comphelper/automationinvokedzone.hxx
@@ -0,0 +1,39 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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 INCLUDED_COMPHELPER_AUTOMATIONINVOKEDZONE_HXX
+#define INCLUDED_COMPHELPER_AUTOMATIONINVOKEDZONE_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+// Helpers for use when calling into LO from an Automation (OLE
+// Automation) client.
+
+namespace comphelper
+{
+namespace Automation
+{
+// Create an object of this class at the start of a function directly invoked from an Automation
+// client.
+
+class COMPHELPER_DLLPUBLIC AutomationInvokedZone
+{
+public:
+    AutomationInvokedZone();
+
+    ~AutomationInvokedZone();
+
+    static bool isActive();
+};
+}
+}
+
+#endif // INCLUDED_COMPHELPER_AUTOMATIONINVOKEDZONE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */