1 files changed, 69 insertions, 0 deletions
diff --git a/sw/source/core/inc/laycache.hxx b/sw/source/core/inc/laycache.hxx
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+++ b/sw/source/core/inc/laycache.hxx
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+/* -*- 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 .
+ */
+
+#ifndef INCLUDED_SW_SOURCE_CORE_INC_LAYCACHE_HXX
+#define INCLUDED_SW_SOURCE_CORE_INC_LAYCACHE_HXX
+
+#include <sal/types.h>
+#include <memory>
+
+class SwDoc;
+class SwLayCacheImpl;
+class SvStream;
+
+/*
+ * This class allows to save layout information in the file and it contains
+ * this information after loading of a file.
+ * Call Write(..) with a stream and the document to save and the page break
+ * information of the document will be written.
+ * Call Read(..) with a stream and the member pLayCacheImpl will
+ * read the information from the stream and store it in an internal structure.
+ * There's a simple locking mechanism at these classes,
+ * if somebody reads the information, he increments the lock count by 1,
+ * during the Read(..) function the lock count will set to $8000.
+ */
+class SwLayoutCache
+{
+    std::unique_ptr<SwLayCacheImpl> pImpl;
+    sal_uInt16 nLockCount;
+
+public:
+    SwLayoutCache();
+    ~SwLayoutCache();
+
+    void Read( SvStream &rStream );
+    static void Write( SvStream &rStream, const SwDoc& rDoc );
+
+    void ClearImpl();
+    bool IsLocked() const { return nLockCount > 0; }
+    sal_uInt16& GetLockCount() { return nLockCount; }
+    SwLayCacheImpl *LockImpl()
+        { if( nLockCount & 0x8000 ) return nullptr;
+          if ( pImpl )
+            ++nLockCount;
+          return pImpl.get(); }
+    void UnlockImpl() { --nLockCount; }
+
+#ifdef DBG_UTIL
+    bool CompareLayout( const SwDoc& rDoc ) const;
+#endif
+};
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */