--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgui/src/documentation.h	Wed Mar 28 21:46:11 2018 +0200
@@ -0,0 +1,98 @@
+/*
+
+Copyright (C) 2018 Torsten <mttl@maibox.org>
+
+This file is part of Octave.
+
+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 3 of the License, 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, see
+<https://www.gnu.org/licenses/>.
+
+*/
+
+#if ! defined (octave_documentation_h)
+#define octave_documentation_h 1
+
+#include <QComboBox>
+#include <QWidget>
+#include <QSettings>
+#include <QSplitter>
+#include <QTextBrowser>
+#include <QtHelp/QHelpEngine>
+
+namespace octave
+{
+  // The documentation browser
+  class documentation_browser : public QTextBrowser
+  {
+    Q_OBJECT
+
+  public:
+
+    documentation_browser (QHelpEngine *help_engine, QWidget *parent = nullptr);
+    ~documentation_browser (void);
+
+    virtual QVariant loadResource (int type, const QUrl &url);
+
+  public slots:
+
+    void handle_index_clicked (const QUrl& url,
+                               const QString& keyword = QString ());
+    void notice_settings (const QSettings *settings);
+
+  private:
+
+    QHelpEngine *m_help_engine;
+
+  };
+
+
+  // The documentaiton main class (splitter)
+  class documentation : public QSplitter
+  {
+    Q_OBJECT
+
+  public:
+
+    documentation (QWidget *parent = nullptr);
+    ~documentation (void);
+
+  public slots:
+
+    void notice_settings (const QSettings *settings);
+
+    void copyClipboard (void);
+    void pasteClipboard (void);
+    void selectAll (void);
+
+    void load_ref (const QString & name);
+
+  private slots:
+
+    void global_search (void);
+    void global_search_started (void);
+    void global_search_finished (int hits);
+    void filter_update (const QString& expression);
+    void filter_update_history (void);
+
+  private:
+
+    QHelpEngine *m_help_engine;
+    documentation_browser *m_doc_browser;
+    QComboBox *m_filter;
+
+  };
+
+}
+
+#endif