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+/* Copyright (C) 2009 P.L. Lucas
+ * Copyright (C) 2012 Jacob Dawid <jacob.dawid@gmail.com>
+ *
+ * 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.
+ */
+
+#include <QStringList>
+#include <QIODevice>
+#include <QFileInfoList>
+#include <QHash>
+
+/**
+ * \class parser
+ * This class gets nodes and searchs inside of `info files'.
+ * <p>Each info file has nodes. Every node has the documentation.
+ * Info files contains a map with position of each node.</p>
+ * <p>What is position?
+ * There is a simple answer:
+ * If you make a queue with info files, position will be the number of bytes
+ * from begining to node position.</p>
+ * <p>
+ * But is not so easy. There is headers, and qtinfo must not take these headers into account.
+ * </p>
+ * <p>
+ * This class also translates info files to html.
+ * </p>
+ */
+class parser
+    : public QObject
+{
+  Q_OBJECT
+
+public:
+  parser (QObject *parent = 0);
+  void set_info_path (QString _info_path);
+  QString get_info_path ();
+  QString search_node (QString node);
+  QString global_search (QString text, int maxFounds);
+
+  /** Checks if this node is reference. If node is reference, it will be returned its position
+    * in text, else  it will be returned -1.
+    */
+  int is_ref (QString node);
+
+  /**Translates text of node to Html. If anchorPos is not -1, then anchor is inserted in that
+    * position.
+    */
+  QString node_text_to_html (QString text, int anchorPos=-1, QString anchor=QString());
+
+private:
+  struct node_position
+  {
+    QString _node_name;
+    int pos;
+  };
+
+  struct node_map_item
+  {
+    int pos;
+  };
+
+  struct info_file_item
+  {
+    QFileInfo file_info;
+    int real_size;
+  };
+
+  QString search_node (QString node, QIODevice * io);
+  QString get_next_node (QIODevice * io);
+  QString get_node_name (QString text);
+  QString get_node_up (QString text);
+  QString get_node_next (QString text);
+  QString get_node_prev (QString text);
+
+  /** Parses info files and gets map of node positions.*/
+  void parse_info_map();
+
+  /** Open info files and uncompress them. */
+  QIODevice *open_file(QFileInfo & fileInfo);
+
+  /** Calculates real position of nodes.
+    * \param pos position from info file.
+    * \param fileInfo returns file what contains that position.
+    * \param realPos returns real position inside of fileInfo.
+    */
+  void real_position (int pos, QFileInfo & file_info, int & real_pos);
+
+  /** Seeks to position pos. */
+  void seek (QIODevice *io, int pos);
+
+
+  QString                       _info_path;
+  QFileInfoList                 _info_files;
+  QHash<QString, node_map_item> _node_map;
+  QHash<QString, node_position> _ref_map;
+  QList<info_file_item>         _info_file_real_size_list;
+  QHash<QString, QString>       _compressors_map;
+};