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+/*
+ *
+ * Copyright (C) 2007, 2008, 2009 John P. Swensen
+ *
+ * Quint - A graphical user interface for Octave
+ * Copyright (C) 2011 Jacob Dawid
+ * jacob.dawid@googlemail.com
+ * This file is as a part of OctaveDE.
+ *
+ * Octave 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, or (at your option) any
+ * later version.
+ *
+ * Octave 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 Octave; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * */
+
+#ifndef OCTAVELINK_H
+#define OCTAVELINK_H
+
+// Octave includes
+#undef PACKAGE_BUGREPORT
+#undef PACKAGE_NAME
+#undef PACKAGE_STRING
+#undef PACKAGE_TARNAME
+#undef PACKAGE_VERSION
+#undef PACKAGE_URL
+#include <octave/config.h>
+#include "octave/cmd-edit.h"
+#include "octave/error.h"
+#include "octave/file-io.h"
+#include "octave/input.h"
+#include "octave/lex.h"
+#include "octave/load-path.h"
+#include "octave/octave.h"
+#include "octave/oct-hist.h"
+#include "octave/oct-map.h"
+#include "octave/oct-obj.h"
+#include "octave/ops.h"
+#include "octave/ov.h"
+#include "octave/ov-usr-fcn.h"
+#include "octave/symtab.h"
+#include "octave/pt.h"
+#include "octave/pt-eval.h"
+#include "octave/config.h"
+#include "octave/Range.h"
+#include "octave/toplev.h"
+#include "octave/procstream.h"
+#include "octave/sighandlers.h"
+#include "octave/debug.h"
+#include "octave/sysdep.h"
+#include "octave/ov.h"
+#include "octave/unwind-prot.h"
+#include "octave/utils.h"
+#include "octave/variables.h"
+
+// Standard includes
+#include <iostream>
+#include <string>
+#include <vector>
+#include <readline/readline.h>
+
+// Qt includes
+#include <QMutexLocker>
+#include <QMutex>
+#include <QFileInfo>
+#include <QList>
+#include <QString>
+#include <QVector>
+#include <QSemaphore>
+#include <QObject>
+
+typedef symbol_table::symbol_record SymbolRecord;
+typedef octave_value OctaveValue;
+
+/**
+  * \class OctaveLink
+  * Manages a link to an octave instance.
+  */
+class OctaveLink : QObject
+{
+    Q_OBJECT
+public:
+    static OctaveLink *instance() { return &m_singleton; }
+    static int readlineEventHook(void);
+    static QString octaveValueAsQString(OctaveValue octaveValue);
+
+    /**
+      * Returns a copy of the current symbol table buffer.
+      * \return Copy of the current symbol table buffer.
+      */
+    QList<SymbolRecord> currentSymbolTable();
+
+    /**
+      * Returns a copy of the current history buffer.
+      * \return Copy of the current history buffer.
+      */
+    string_vector currentHistory();
+
+    void processOctaveServerData();
+
+    /**
+      * Updates the current symbol table with new data
+      * from octave.
+      */
+    void fetchSymbolTable();
+
+    /**
+      * Updates the current history buffer with new data
+      * from octave.
+      */
+    void fetchHistory();
+
+signals:
+    void symbolTableChanged();
+    void historyChanged();
+
+private:
+    OctaveLink();
+    ~OctaveLink();
+
+    /** Variable related member variables. */
+    QSemaphore *m_symbolTableSemaphore;
+    QList<SymbolRecord> m_symbolTableBuffer;
+
+    /** History related member variables. */
+    QSemaphore *m_historySemaphore;
+    string_vector m_historyBuffer;
+    int m_previousHistoryLength;
+
+    static OctaveLink m_singleton;
+};
+#endif // OCTAVELINK_H
+