src/mathed/InsetMathPhantom.cpp

   1 /**
   2  * \file InsetMathPhantom.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Georg Baum
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetMathPhantom.h"
  14
  15 #include "MathStream.h"
  16 #include "frontends/Painter.h"
  17
  18 #include <ostream>
  19
  20 namespace lyx {
  21
  22
  23 InsetMathPhantom::InsetMathPhantom(Buffer * buf, Kind k)
  24         : InsetMathNest(buf, 1), kind_(k)
  25 {}
  26
  27
  28 Inset * InsetMathPhantom::clone() const
  29 {
  30         return new InsetMathPhantom(*this);
  31 }
  32
  33
  34 void InsetMathPhantom::metrics(MetricsInfo & mi, Dimension & dim) const
  35 {
  36         cell(0).metrics(mi, dim);
  37         metricsMarkers(dim);
  38 }
  39
  40
  41 void InsetMathPhantom::draw(PainterInfo & pi, int x, int y) const
  42 {
  43         static int const arrow_size = 4;
  44
  45         // We first draw the text and then an arrow
  46         ColorCode const origcol = pi.base.font.color();
  47         pi.base.font.setColor(Color_special);
  48         cell(0).draw(pi, x + 1, y);
  49         pi.base.font.setColor(origcol);
  50         Dimension const dim = dimension(*pi.base.bv);
  51
  52         if (kind_ == phantom || kind_ == vphantom) {
  53                 // y1---------
  54                 //           / \.
  55                 // y2-----  / | \.
  56                 //            |
  57                 //            |
  58                 // y3-----  \ | /
  59                 //           \ /
  60                 // y4---------
  61                 //          | | |
  62                 //         /  |  \.
  63                 //        x1  x2 x3
  64
  65                 int const x2 = x + dim.wid / 2;
  66                 int const x1 = x2 - arrow_size;
  67                 int const x3 = x2 + arrow_size;
  68
  69                 int const y1 = y - dim.asc;
  70                 int const y2 = y1 + arrow_size;
  71                 int const y4 = y + dim.des;
  72                 int const y3 = y4 - arrow_size;
  73
  74                 // top arrow
  75                 pi.pain.line(x2, y1, x1, y2, Color_added_space);
  76                 pi.pain.line(x2, y1, x3, y2, Color_added_space);
  77
  78                 // bottom arrow
  79                 pi.pain.line(x2, y4, x1, y3, Color_added_space);
  80                 pi.pain.line(x2, y4, x3, y3, Color_added_space);
  81
  82                 // joining line
  83                 pi.pain.line(x2, y1, x2, y4, Color_added_space);
  84         }
  85
  86         if (kind_ == phantom || kind_ == hphantom) {
  87                 // y1----   /          \.
  88                 //        /              \.
  89                 // y2--- <---------------->
  90                 //        \              /
  91                 // y3----   \          /
  92                 //       |   |        |   |
  93                 //      x1  x2       x3  x4
  94
  95                 int const x1 = x;
  96                 int const x2 = x + arrow_size;
  97                 int const x4 = x + dim.wid;
  98                 int const x3 = x4 - arrow_size;
  99
 100                 int const y2 = y + (dim.des - dim.asc) / 2;
 101                 int const y1 = y2 - arrow_size;
 102                 int const y3 = y2 + arrow_size;
 103
 104                 // left arrow
 105                 pi.pain.line(x1, y2, x2, y3, Color_added_space);
 106                 pi.pain.line(x1, y2, x2, y1, Color_added_space);
 107
 108                 // right arrow
 109                 pi.pain.line(x4, y2, x3, y3, Color_added_space);
 110                 pi.pain.line(x4, y2, x3, y1, Color_added_space);
 111
 112                 // joining line
 113                 pi.pain.line(x1, y2, x4, y2, Color_added_space);
 114         }
 115
 116         drawMarkers(pi, x, y);
 117 }
 118
 119
 120 void InsetMathPhantom::write(WriteStream & os) const
 121 {
 122         MathEnsurer ensurer(os);
 123         switch (kind_) {
 124         case phantom:
 125                 os << "\\phantom{";
 126                 break;
 127         case vphantom:
 128                 os << "\\vphantom{";
 129                 break;
 130         case hphantom:
 131                 os << "\\hphantom{";
 132                 break;
 133         }
 134         os << cell(0) << '}';
 135 }
 136
 137
 138 void InsetMathPhantom::normalize(NormalStream & os) const
 139 {
 140         switch (kind_) {
 141         case phantom:
 142                 os << "[phantom ";
 143                 break;
 144         case vphantom:
 145                 os << "[vphantom ";
 146                 break;
 147         case hphantom:
 148                 os << "[hphantom ";
 149                 break;
 150         }
 151         os << cell(0) << ']';
 152 }
 153
 154
 155 void InsetMathPhantom::infoize(odocstream & os) const
 156 {
 157         switch (kind_) {
 158         case phantom:
 159                 os << "Phantom";
 160                 break;
 161         case vphantom:
 162                 os << "Vphantom";
 163                 break;
 164         case hphantom:
 165                 os << "Hphantom";
 166                 break;
 167         }
 168 }
 169
 170
 171 } // namespace lyx