vcl: extract SwapFile impl. into its own class and use in Graphic

Change-Id: Ib4c06b81b4ed87cf6b461a67a28bae90b2b26535
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107282
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

1 files changed, 72 insertions, 0 deletions

diff --git a/include/vcl/SwapFile.hxx b/include/vcl/SwapFile.hxx
new file mode 100644
index 000000000000..55146d608eb8
--- /dev/null
+++ b/include/vcl/SwapFile.hxx
@@ -0,0 +1,72 @@
+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <vcl/dllapi.h>
+#include <tools/urlobj.hxx>
+#include <tools/stream.hxx>
+#include <unotools/ucbhelper.hxx>
+#include <unotools/ucbstreamhelper.hxx>
+
+namespace vcl
+{
+class VCL_DLLPUBLIC SwapFile
+{
+private:
+    INetURLObject maSwapURL;
+
+public:
+    SwapFile(INetURLObject const& rSwapURL)
+        : maSwapURL(rSwapURL)
+    {
+    }
+
+    ~SwapFile() COVERITY_NOEXCEPT_FALSE
+    {
+        utl::UCBContentHelper::Kill(maSwapURL.GetMainURL(INetURLObject::DecodeMechanism::NONE));
+    }
+
+    INetURLObject getSwapURL() const { return maSwapURL; }
+
+    OUString getSwapURLString() const
+    {
+        return maSwapURL.GetMainURL(INetURLObject::DecodeMechanism::NONE);
+    }
+
+    std::unique_ptr<SvStream> openOutputStream()
+    {
+        OUString sSwapURL = getSwapURLString();
+        if (!sSwapURL.isEmpty())
+        {
+            try
+            {
+                return utl::UcbStreamHelper::CreateStream(
+                    sSwapURL, StreamMode::READWRITE | StreamMode::SHARE_DENYWRITE);
+            }
+            catch (const css::uno::Exception&)
+            {
+            }
+        }
+        return std::unique_ptr<SvStream>();
+    }
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */