src/Row.cpp

   1 /**
   2  * \file Row.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author unknown
   7  * \author Lars Gullik Bjønnes
   8  * \author John Levon
   9  * \author André Pönitz
  10  * \author Jürgen Vigna
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  *
  14  * Metrics for an on-screen text row.
  15  */
  16
  17 #include <config.h>
  18
  19 #include "Row.h"
  20
  21 #include "DocIterator.h"
  22
  23 #include "support/debug.h"
  24
  25
  26 namespace lyx {
  27
  28
  29 Row::Row()
  30         : separator(0), label_hfill(0), x(0),
  31         sel_beg(-1), sel_end(-1),
  32         begin_margin_sel(false), end_margin_sel(false),
  33         changed_(false), crc_(0), pos_(0), end_(0)
  34 {}
  35
  36
  37 void Row::setCrc(size_type crc) const
  38 {
  39         changed_ = crc != crc_;
  40         crc_ = crc;
  41 }
  42
  43
  44 void Row::setDimension(Dimension const & dim)
  45 {
  46         dim_ = dim;
  47 }
  48
  49
  50 void Row::pos(pos_type p)
  51 {
  52         pos_ = p;
  53 }
  54
  55
  56 void Row::endpos(pos_type p)
  57 {
  58         end_ = p;
  59 }
  60
  61
  62 bool Row::isMarginSelected(bool left_margin, DocIterator const & beg,
  63                 DocIterator const & end) const
  64 {
  65         pos_type const sel_pos = left_margin ? sel_beg : sel_end;
  66         pos_type const margin_pos = left_margin ? pos_ : end_;
  67
  68         // Is the chosen margin selected ?
  69         if (sel_pos == margin_pos) {
  70                 if (beg.pos() == end.pos())
  71                         // This is a special case in which the space between after
  72                         // pos i-1 and before pos i is selected, i.e. the margins
  73                         // (see DocIterator::boundary_).
  74                         return beg.boundary() && !end.boundary();
  75                 else if (end.pos() == margin_pos)
  76                         // If the selection ends around the margin, it is only
  77                         // drawn if the cursor is after the margin.
  78                         return !end.boundary();
  79                 else if (beg.pos() == margin_pos)
  80                         // If the selection begins around the margin, it is
  81                         // only drawn if the cursor is before the margin.
  82                         return beg.boundary();
  83                 else
  84                         return true;
  85         }
  86         return false;
  87 }
  88
  89
  90 void Row::setSelectionAndMargins(DocIterator const & beg,
  91                 DocIterator const & end) const
  92 {
  93         setSelection(beg.pos(), end.pos());
  94
  95         if (selection()) {
  96                 end_margin_sel = isMarginSelected(false, beg, end);
  97                 begin_margin_sel = isMarginSelected(true, beg, end);
  98         }
  99 }
 100
 101
 102 void Row::setSelection(pos_type beg, pos_type end) const
 103 {
 104         if (pos_ >= beg && pos_ <= end)
 105                 sel_beg = pos_;
 106         else if (beg > pos_ && beg <= end_)
 107                 sel_beg = beg;
 108         else
 109                 sel_beg = -1;
 110
 111         if (end_ >= beg && end_ <= end)
 112                 sel_end = end_;
 113         else if (end < end_ && end >= pos_)
 114                 sel_end = end;
 115         else
 116                 sel_end = -1;
 117 }
 118
 119
 120 bool Row::selection() const
 121 {
 122         return sel_beg != -1 && sel_end != -1;
 123 }
 124
 125
 126 void Row::dump(char const * s) const
 127 {
 128         LYXERR0(s << " pos: " << pos_ << " end: " << end_
 129                 << " width: " << dim_.wid
 130                 << " ascent: " << dim_.asc
 131                 << " descent: " << dim_.des);
 132 }
 133
 134
 135 } // namespace lyx