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87 lines
1.9 KiB
C++
87 lines
1.9 KiB
C++
// -*- C++ -*-
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/**
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* \file Bidi.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Dekel Tsur
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef BIDI_H
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#define BIDI_H
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#include "support/types.h"
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#include <vector>
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namespace lyx {
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class Buffer;
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class Cursor;
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class Paragraph;
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class Row;
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class Font;
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/// bidi stuff
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class Bidi {
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public:
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///
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bool isBoundary(Buffer const &, Paragraph const & par,
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pos_type pos) const;
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///
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bool isBoundary(Buffer const &, Paragraph const & par,
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pos_type pos, Font const & font) const;
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/** Maps positions in the visual string to positions
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* in logical string.
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*/
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pos_type log2vis(pos_type pos) const;
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/** Maps positions in the logical string to positions
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* in visual string.
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*/
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pos_type vis2log(pos_type pos) const;
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/*
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* The text direction at logical position \param pos.
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* Possible values are
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* 0: left-to-right text
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* 1: right-to-left text
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* 2: left-to-right text in right-to-left language (aka numbers)
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*/
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pos_type level(pos_type pos) const;
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/// Is logical position covered by this row?
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bool inRange(pos_type pos) const;
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/// Is the whole row in the same direction as the paragraph?
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bool same_direction() const;
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/// Compute the data for visual positions.
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void computeTables(Paragraph const & par,
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Buffer const &, Row const & row);
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private:
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///
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bool same_direction_;
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///
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std::vector<pos_type> log2vis_list_;
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/** Maps positions in the visual string to positions
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* in logical string.
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*/
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std::vector<pos_type> vis2log_list_;
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///
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std::vector<pos_type> levels_;
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///
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pos_type start_;
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///
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pos_type end_;
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};
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/// Should interpretation of the arrow keys be reversed?
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bool reverseDirectionNeeded(Cursor const & cur);
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/// Is current paragraph in RTL mode?
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bool isWithinRtlParagraph(Cursor const & cur);
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} // namespace lyx
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#endif // BIDI_H
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