src/Row.h

   1 // -*- C++ -*-
   2 /**
   3  * \file Row.h
   4  * This file is part of LyX, the document processor.
   5  * Licence details can be found in the file COPYING.
   6  *
   7  * \author Matthias Ettrich
   8  * \author Lars Gullik Bjønnes
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  *
  12  * Metrics for an on-screen text row.
  13  */
  14
  15 #ifndef ROW_H
  16 #define ROW_H
  17
  18 #include "support/types.h"
  19
  20 #include "Dimension.h"
  21
  22
  23 namespace lyx {
  24
  25 class DocIterator;
  26
  27 /**
  28  * An on-screen row of text. A paragraph is broken into a
  29  * RowList for display. Each Row contains position pointers
  30  * into the first and last character positions of that row.
  31  */
  32 class Row {
  33 public:
  34         ///
  35         Row();
  36         ///
  37         bool changed() const { return changed_; }
  38         ///
  39         void setChanged(bool c) { changed_ = c; }
  40         ///
  41         void setCrc(size_type crc) const;
  42         /// Set the selection begin and end.
  43         /**
  44           * This is const because we update the selection status only at draw()
  45           * time.
  46           */
  47         void setSelection(pos_type sel_beg, pos_type sel_end) const;
  48         ///
  49         bool selection() const;
  50         /// Set the selection begin and end and whether the left and/or right
  51         /// margins are selected.
  52         void setSelectionAndMargins(DocIterator const & beg,
  53                 DocIterator const & end) const;
  54
  55         ///
  56         void pos(pos_type p);
  57         ///
  58         pos_type pos() const { return pos_; }
  59         ///
  60         void endpos(pos_type p);
  61         ///
  62         pos_type endpos() const { return end_; }
  63         ///
  64         void setDimension(Dimension const & dim);
  65         ///
  66         Dimension const & dimension() const { return dim_; }
  67         ///
  68         int height() const { return dim_.height(); }
  69         ///
  70         int width() const { return dim_.wid; }
  71         ///
  72         int ascent() const { return dim_.asc; }
  73         ///
  74         int descent() const { return dim_.des; }
  75
  76         /// current debugging only
  77         void dump(char const * = "") const;
  78
  79         /// width of a separator (i.e. space)
  80         double separator;
  81         /// width of hfills in the label
  82         double label_hfill;
  83         /// the x position of the row
  84         double x;
  85         ///
  86         mutable pos_type sel_beg;
  87         ///
  88         mutable pos_type sel_end;
  89         ///
  90         mutable bool begin_margin_sel;
  91         ///
  92         mutable bool end_margin_sel;
  93
  94 private:
  95         /// Decides whether the margin is selected.
  96         /**
  97           * \param margin_begin
  98           * \param beg
  99           * \param end
 100           */
 101         bool isMarginSelected(bool left_margin, DocIterator const & beg,
 102                 DocIterator const & end) const;
 103
 104         /// has the Row appearance changed since last drawing?
 105         mutable bool changed_;
 106         /// CRC of row contents.
 107         mutable size_type crc_;
 108         /// first pos covered by this row
 109         pos_type pos_;
 110         /// one behind last pos covered by this row
 111         pos_type end_;
 112         /// Row dimension.
 113         Dimension dim_;
 114 };
 115
 116
 117 } // namespace lyx
 118
 119 #endif