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 /**
  26  * An on-screen row of text. A paragraph is broken into a
  27  * RowList for display. Each Row contains position pointers
  28  * into the first and last character positions of that row.
  29  */
  30 class Row {
  31 public:
  32         ///
  33         Row();
  34         ///
  35         Row(pos_type pos);
  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         ///
  50         void pos(pos_type p);
  51         ///
  52         pos_type pos() const { return pos_; }
  53         ///
  54         void endpos(pos_type p);
  55         ///
  56         pos_type endpos() const { return end_; }
  57         ///
  58         void setDimension(Dimension const & dim);
  59         ///
  60         Dimension const & dimension() const { return dim_; }
  61         ///
  62         int height() const { return dim_.height(); }
  63         ///
  64         int width() const { return dim_.wid; }
  65         ///
  66         int ascent() const { return dim_.asc; }
  67         ///
  68         int descent() const { return dim_.des; }
  69
  70         /// current debugging only
  71         void dump(char const * = "") const;
  72
  73         /// width of a separator (i.e. space)
  74         double separator;
  75         /// width of hfills in the label
  76         double label_hfill;
  77         /// the x position of the row
  78         double x;
  79         ///
  80         mutable pos_type sel_beg;
  81         ///
  82         mutable pos_type sel_end;
  83 private:
  84         /// has the Row appearance changed since last drawing?
  85         mutable bool changed_;
  86         /// CRC of row contents.
  87         mutable size_type crc_;
  88         /// first pos covered by this row
  89         pos_type pos_;
  90         /// one behind last pos covered by this row
  91         pos_type end_;
  92         /// Row dimension.
  93         Dimension dim_;
  94 };
  95
  96
  97 } // namespace lyx
  98
  99 #endif