src/Bidi.h

   1 // -*- C++ -*-
   2 /**
   3  * \file Bidi.h
   4  * This file is part of LyX, the document processor.
   5  * Licence details can be found in the file COPYING.
   6  *
   7  * \author Dekel Tsur
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #ifndef BIDI_H
  13 #define BIDI_H
  14
  15 #include "support/types.h"
  16
  17 #include <vector>
  18
  19
  20 namespace lyx {
  21
  22 class Buffer;
  23 class Cursor;
  24 class Paragraph;
  25 class Row;
  26 class Font;
  27
  28
  29 /// bidi stuff
  30 class Bidi {
  31 public:
  32         ///
  33         bool isBoundary(Buffer const &, Paragraph const & par,
  34                         pos_type pos) const;
  35         ///
  36         bool isBoundary(Buffer const &, Paragraph const & par,
  37                                 pos_type pos, Font const & font) const;
  38         ///
  39         pos_type log2vis(pos_type pos) const;
  40         /** Maps positions in the logical string to positions
  41          *  in visual string.
  42          */
  43         pos_type vis2log(pos_type pos) const;
  44         ///
  45         pos_type level(pos_type pos) const;
  46         ///
  47         bool inRange(pos_type pos) const;
  48         /// same_direction?
  49         bool same_direction() const;
  50         ///
  51         void computeTables(Paragraph const & par,
  52                            Buffer const &, Row const & row);
  53 private:
  54         ///
  55         bool same_direction_;
  56         ///
  57         std::vector<pos_type> log2vis_list_;
  58         /** Maps positions in the visual string to positions
  59          *  in logical string.
  60          */
  61         std::vector<pos_type> vis2log_list_;
  62         ///
  63         std::vector<pos_type> levels_;
  64         ///
  65         pos_type start_;
  66         ///
  67         pos_type end_;
  68 };
  69
  70 /// Should interpretation of the arrow keys be reversed?
  71 bool reverseDirectionNeeded(Cursor const & cur);
  72
  73 /// Is current paragraph in RTL mode?
  74 bool isWithinRtlParagraph(Cursor const & cur);
  75
  76 } // namespace lyx
  77
  78 #endif // BIDI_H