1 files changed, 101 insertions, 0 deletions
diff --git a/svx/source/sidebar/SelectionChangeHandler.cxx b/svx/source/sidebar/SelectionChangeHandler.cxx
new file mode 100644
index 0000000000..6affde64e7
--- /dev/null
+++ b/svx/source/sidebar/SelectionChangeHandler.cxx
@@ -0,0 +1,101 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#include <svx/sidebar/SelectionChangeHandler.hxx>
+#include <svx/sidebar/ContextChangeEventMultiplexer.hxx>
+
+#include <com/sun/star/view/XSelectionSupplier.hpp>
+
+#include <utility>
+#include <vcl/EnumContext.hxx>
+
+
+using namespace css;
+using namespace css::uno;
+
+namespace svx::sidebar {
+
+SelectionChangeHandler::SelectionChangeHandler (
+    std::function<OUString()> aSelectionChangeCallback,
+    const Reference<css::frame::XController>& rxController,
+    const vcl::EnumContext::Context eDefaultContext)
+    : maSelectionChangeCallback(std::move(aSelectionChangeCallback)),
+      mxController(rxController),
+      meDefaultContext(eDefaultContext),
+      mbIsConnected(false)
+{
+}
+
+
+SelectionChangeHandler::~SelectionChangeHandler()
+{
+}
+
+
+void SAL_CALL SelectionChangeHandler::selectionChanged (const lang::EventObject&)
+{
+    if (maSelectionChangeCallback)
+    {
+        const vcl::EnumContext::Context eContext (
+            vcl::EnumContext::GetContextEnum(maSelectionChangeCallback()));
+        ContextChangeEventMultiplexer::NotifyContextChange(
+            mxController,
+            eContext==vcl::EnumContext::Context::Unknown
+                ? meDefaultContext
+                : eContext);
+    }
+}
+
+
+void SAL_CALL SelectionChangeHandler::disposing (const lang::EventObject&)
+{
+}
+
+
+void SelectionChangeHandler::disposing(std::unique_lock<std::mutex>&)
+{
+    if (mbIsConnected)
+        Disconnect();
+}
+
+
+void SelectionChangeHandler::Connect()
+{
+    uno::Reference<view::XSelectionSupplier> xSupplier (mxController, uno::UNO_QUERY);
+    if (xSupplier.is())
+    {
+        mbIsConnected = true;
+        xSupplier->addSelectionChangeListener(this);
+    }
+}
+
+
+void SelectionChangeHandler::Disconnect()
+{
+    uno::Reference<view::XSelectionSupplier> xSupplier (mxController, uno::UNO_QUERY);
+    if (xSupplier.is())
+    {
+        mbIsConnected = false;
+        xSupplier->removeSelectionChangeListener(this);
+    }
+}
+
+
+} // end of namespace svx::sidebar
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */