Initial import

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diff --git a/src/element.h b/src/element.h
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+/***************************************************************************
+*   Copyright (C) 2004-2006 by Thomas Fischer                             *
+*   fischer@unix-ag.uni-kl.de                                             *
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+*   This program is distributed in the hope that it will be useful,       *
+*   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+*   GNU General Public License for more details.                          *
+*                                                                         *
+*   You should have received a copy of the GNU General Public License     *
+*   along with this program; if not, write to the                         *
+*   Free Software Foundation, Inc.,                                       *
+*   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+***************************************************************************/
+#ifndef BIBTEXELEMENT_H
+#define BIBTEXELEMENT_H
+
+#include <file.h>
+#include <entryfield.h>
+
+class QString;
+
+namespace BibTeX
+{
+
+    class Element
+    {
+    public:
+        enum FilterType {ftExact, ftEveryWord, ftAnyWord};
+
+        Element();
+        virtual ~Element();
+
+        virtual bool containsPattern( const QString& /* pattern */, BibTeX::EntryField::FieldType /* fieldType */, FilterType /* filterType */ = BibTeX::Element::ftExact, bool /* caseSensitive */ = false ) const = 0;
+        virtual Element* clone() = 0;
+        virtual QString text() const = 0;
+
+        static bool isSimpleString( const QString &text );
+
+    };
+
+}
+
+#endif