src/mathed/InsetMathSpecialChar.cpp

   1 /**
   2  * \file InsetMathSpecialChar.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Enrico Forestieri
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetMathSpecialChar.h"
  14
  15 #include "MathSupport.h"
  16 #include "MathStream.h"
  17 #include "MetricsInfo.h"
  18
  19 #include "Dimension.h"
  20 #include "LaTeXFeatures.h"
  21 #include "TextPainter.h"
  22
  23 #include "frontends/FontMetrics.h"
  24 #include "frontends/Painter.h"
  25
  26 #include "support/lassert.h"
  27
  28
  29 namespace lyx {
  30
  31
  32 InsetMathSpecialChar::InsetMathSpecialChar(docstring const & name)
  33         : name_(name), kerning_(0)
  34 {
  35         if (name.size() != 1) {
  36                 if (name == "textasciicircum" || name == "mathcircumflex")
  37                         char_ = '^';
  38                 else if (name == "textasciitilde")
  39                         char_ = '~';
  40                 else if (name == "textbackslash")
  41                         char_ = '\\';
  42                 else
  43                         LASSERT(false, /**/);
  44         } else
  45                 char_ = name.at(0);
  46 }
  47
  48
  49
  50 Inset * InsetMathSpecialChar::clone() const
  51 {
  52         return new InsetMathSpecialChar(*this);
  53 }
  54
  55
  56 void InsetMathSpecialChar::metrics(MetricsInfo & mi, Dimension & dim) const
  57 {
  58         if (char_ == ' ') {
  59                 dim.asc = 4;
  60                 dim.des = 0;
  61                 dim.wid = 10;
  62         } else if (mi.base.fontname == "mathnormal") {
  63                 ShapeChanger dummy(mi.base.font, UP_SHAPE);
  64                 dim = theFontMetrics(mi.base.font).dimension(char_);
  65         } else {
  66                 frontend::FontMetrics const & fm = theFontMetrics(mi.base.font);
  67                 dim = fm.dimension(char_);
  68                 kerning_ = fm.rbearing(char_) - dim.wid;
  69         }
  70 }
  71
  72
  73 void InsetMathSpecialChar::draw(PainterInfo & pi, int x, int y) const
  74 {
  75         if (char_ == ' ') {
  76                 int xp[4];
  77                 int yp[4];
  78                 int w = 10;
  79
  80                 xp[0] = ++x;        yp[0] = y - 3;
  81                 xp[1] = x;          yp[1] = y;
  82                 xp[2] = x + w - 2;  yp[2] = y;
  83                 xp[3] = x + w - 2;  yp[3] = y - 3;
  84
  85                 pi.pain.lines(xp, yp, 4, Color_special);
  86         } else if (pi.base.fontname == "mathnormal") {
  87                 ShapeChanger dummy(pi.base.font, UP_SHAPE);
  88                 pi.draw(x, y, char_);
  89         } else {
  90                 pi.draw(x, y, char_);
  91         }
  92 }
  93
  94
  95 void InsetMathSpecialChar::metricsT(TextMetricsInfo const &, Dimension & dim) const
  96 {
  97         dim.wid = 1;
  98         dim.asc = 1;
  99         dim.des = 0;
 100 }
 101
 102
 103 void InsetMathSpecialChar::drawT(TextPainter & pain, int x, int y) const
 104 {
 105         pain.draw(x, y, char_);
 106 }
 107
 108
 109 void InsetMathSpecialChar::write(WriteStream & os) const
 110 {
 111         os << '\\' << name_;
 112         if (name_.size() != 1)
 113                 os.pendingSpace(true);
 114 }
 115
 116
 117 void InsetMathSpecialChar::validate(LaTeXFeatures & features) const
 118 {
 119         if (name_ == "mathcircumflex")
 120                 features.require("mathcircumflex");
 121 }
 122
 123
 124 void InsetMathSpecialChar::normalize(NormalStream & os) const
 125 {
 126         os << "[char ";
 127         os.os().put(char_);
 128         os << " mathalpha]";
 129 }
 130
 131
 132 void InsetMathSpecialChar::maple(MapleStream & os) const
 133 {
 134         os.os().put(char_);
 135 }
 136
 137
 138 void InsetMathSpecialChar::mathematica(MathematicaStream & os) const
 139 {
 140         os.os().put(char_);
 141 }
 142
 143
 144 void InsetMathSpecialChar::octave(OctaveStream & os) const
 145 {
 146         os.os().put(char_);
 147 }
 148
 149
 150 void InsetMathSpecialChar::mathmlize(MathStream & ms) const
 151 {
 152         switch (char_) {
 153         case '&':
 154                 ms << "&amp;";
 155                 break;
 156         default:
 157                 ms.os().put(char_);
 158                 break;
 159         }
 160 }
 161
 162
 163 } // namespace lyx