writerfilter: add RTFLookahead to be able to look ahead during import

Change-Id: I1da765373c352c8a2aa486fe6210b16bf492728c

1 files changed, 56 insertions, 0 deletions

diff --git a/writerfilter/source/rtftok/rtflookahead.hxx b/writerfilter/source/rtftok/rtflookahead.hxx
new file mode 100644
index 000000000000..958700edb27b
--- /dev/null
+++ b/writerfilter/source/rtftok/rtflookahead.hxx
@@ -0,0 +1,56 @@
+/* -*- 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/.
+ */
+
+#ifndef _RTFLOOKAHEAD_HXX_
+#define _RTFLOOKAHEAD_HXX_
+
+#include <rtflistener.hxx>
+#include <rtftokenizer.hxx>
+
+class SvStream;
+
+namespace writerfilter {
+    namespace rtftok {
+        /**
+         * This acts like an importer, but used for looking ahead, e.g. to
+         * determine if the current group contains a table, etc.
+         */
+        class RTFLookahead : public RTFListener
+        {
+            public:
+                RTFLookahead(SvStream& rStream, sal_Size nGroupStart);
+                virtual ~RTFLookahead();
+                virtual int dispatchDestination(RTFKeyword nKeyword);
+                virtual int dispatchFlag(RTFKeyword nKeyword);
+                virtual int dispatchSymbol(RTFKeyword nKeyword);
+                virtual int dispatchToggle(RTFKeyword nKeyword, bool bParam, int nParam);
+                virtual int dispatchValue(RTFKeyword nKeyword, int nParam);
+                virtual int resolveChars(char ch);
+                virtual int pushState();
+                virtual int popState();
+                virtual RTFDestinationState getDestinationState();
+                virtual void setDestinationState(RTFDestinationState nDestinationState);
+                virtual RTFInternalState getInternalState();
+                virtual void setInternalState(RTFInternalState nInternalState);
+                virtual bool getSkipUnknown();
+                virtual void setSkipUnknown(bool bSkipUnknown);
+                virtual void finishSubstream();
+                virtual bool isSubstream() const;
+                bool hasTable();
+            private:
+                boost::shared_ptr<RTFTokenizer> m_pTokenizer;
+                SvStream& m_rStream;
+                bool m_bHasTable;
+        };
+    } // namespace rtftok
+} // namespace writerfilter
+
+#endif // _RTFDOCUMENTIMPL_HXX_
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */