src/mathed/InsetMathSymbol.cpp

   1 /**
   2  * \file InsetMathSymbol.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetMathSymbol.h"
  14
  15 #include "Dimension.h"
  16 #include "LaTeXFeatures.h"
  17 #include "MathAtom.h"
  18 #include "MathParser.h"
  19 #include "MathStream.h"
  20 #include "MathSupport.h"
  21
  22 #include "support/debug.h"
  23 #include "support/docstream.h"
  24 #include "support/textutils.h"
  25
  26
  27 namespace lyx {
  28
  29 InsetMathSymbol::InsetMathSymbol(latexkeys const * l)
  30         : sym_(l), h_(0), scriptable_(false)
  31 {}
  32
  33
  34 InsetMathSymbol::InsetMathSymbol(char const * name)
  35         : sym_(in_word_set(from_ascii(name))), h_(0), scriptable_(false)
  36 {}
  37
  38
  39 InsetMathSymbol::InsetMathSymbol(docstring const & name)
  40         : sym_(in_word_set(name)), h_(0), scriptable_(false)
  41 {}
  42
  43
  44 Inset * InsetMathSymbol::clone() const
  45 {
  46         return new InsetMathSymbol(*this);
  47 }
  48
  49
  50 docstring InsetMathSymbol::name() const
  51 {
  52         return sym_->name;
  53 }
  54
  55
  56 void InsetMathSymbol::metrics(MetricsInfo & mi, Dimension & dim) const
  57 {
  58         //lyxerr << "metrics: symbol: '" << sym_->name
  59         //      << "' in font: '" << sym_->inset
  60         //      << "' drawn as: '" << sym_->draw
  61         //      << "'" << endl;
  62
  63         int const em = mathed_char_width(mi.base.font, 'M');
  64         FontSetChanger dummy(mi.base, sym_->inset);
  65         mathed_string_dim(mi.base.font, sym_->draw, dim);
  66         docstring::const_reverse_iterator rit = sym_->draw.rbegin();
  67         kerning_ = mathed_char_kerning(mi.base.font, *rit);
  68         // correct height for broken cmex and wasy font
  69         if (sym_->inset == "cmex" || sym_->inset == "wasy") {
  70                 h_ = 4 * dim.des / 5;
  71                 dim.asc += h_;
  72                 dim.des -= h_;
  73         }
  74         // seperate things a bit
  75         if (isRelOp())
  76                 dim.wid += static_cast<int>(0.5 * em + 0.5);
  77         else
  78                 dim.wid += static_cast<int>(0.1667 * em + 0.5);
  79
  80         scriptable_ = false;
  81         if (mi.base.style == LM_ST_DISPLAY)
  82                 if (sym_->inset == "cmex" || sym_->inset == "esint" ||
  83                     sym_->extra == "funclim")
  84                         scriptable_ = true;
  85 }
  86
  87
  88 void InsetMathSymbol::draw(PainterInfo & pi, int x, int y) const
  89 {
  90         //lyxerr << "metrics: symbol: '" << sym_->name
  91         //      << "' in font: '" << sym_->inset
  92         //      << "' drawn as: '" << sym_->draw
  93         //      << "'" << endl;
  94         int const em = mathed_char_width(pi.base.font, 'M');
  95         if (isRelOp())
  96                 x += static_cast<int>(0.25*em+0.5);
  97         else
  98                 x += static_cast<int>(0.0833*em+0.5);
  99
 100         FontSetChanger dummy(pi.base, sym_->inset.c_str());
 101         pi.draw(x, y - h_, sym_->draw);
 102 }
 103
 104
 105 bool InsetMathSymbol::isRelOp() const
 106 {
 107         return sym_->extra == "mathrel";
 108 }
 109
 110
 111 bool InsetMathSymbol::isOrdAlpha() const
 112 {
 113         return sym_->extra == "mathord" || sym_->extra == "mathalpha";
 114 }
 115
 116
 117 bool InsetMathSymbol::isScriptable() const
 118 {
 119         return scriptable_;
 120 }
 121
 122
 123 bool InsetMathSymbol::takesLimits() const
 124 {
 125         return
 126                 sym_->inset == "cmex" ||
 127                 sym_->inset == "lyxboldsymb" ||
 128                 sym_->inset == "esint" ||
 129                 sym_->extra == "funclim";
 130 }
 131
 132
 133 void InsetMathSymbol::validate(LaTeXFeatures & features) const
 134 {
 135         if (!sym_->requires.empty())
 136                 features.require(to_utf8(sym_->requires));
 137 }
 138
 139
 140 void InsetMathSymbol::normalize(NormalStream & os) const
 141 {
 142         os << "[symbol " << name() << ']';
 143 }
 144
 145
 146 void InsetMathSymbol::maple(MapleStream & os) const
 147 {
 148         if (name() == "cdot")
 149                 os << '*';
 150         else if (name() == "infty")
 151                 os << "infinity";
 152         else
 153                 os << name();
 154 }
 155
 156 void InsetMathSymbol::maxima(MaximaStream & os) const
 157 {
 158         if (name() == "cdot")
 159                 os << '*';
 160         else if (name() == "infty")
 161                 os << "inf";
 162         else if (name() == "pi")
 163                 os << "%pi";
 164         else
 165                 os << name();
 166 }
 167
 168
 169 void InsetMathSymbol::mathematica(MathematicaStream & os) const
 170 {
 171         if ( name() == "pi")    { os << "Pi"; return;}
 172         if ( name() == "infty") { os << "Infinity"; return;}
 173         if ( name() == "cdot")  { os << '*'; return;}
 174         os << name();
 175 }
 176
 177
 178 char const * MathMLtype(docstring const & s)
 179 {
 180         if (s == "mathop")
 181                 return "mo";
 182         return "mi";
 183 }
 184
 185
 186 void InsetMathSymbol::mathmlize(MathStream & os) const
 187 {
 188         char const * type = MathMLtype(sym_->extra);
 189         os << '<' << type << "> ";
 190         if (sym_->xmlname == "x") // unknown so far
 191                 os << name();
 192         else
 193                 os << sym_->xmlname;
 194         os << " </" << type << '>';
 195 }
 196
 197
 198 void InsetMathSymbol::octave(OctaveStream & os) const
 199 {
 200         if (name() == "cdot")
 201                 os << '*';
 202         else
 203                 os << name();
 204 }
 205
 206
 207 void InsetMathSymbol::write(WriteStream & os) const
 208 {
 209         MathEnsurer ensurer(os);
 210         os << '\\' << name();
 211
 212         // $,#, etc. In theory the restriction based on catcodes, but then
 213         // we do not handle catcodes very well, let alone cat code changes,
 214         // so being outside the alpha range is good enough.
 215         if (name().size() == 1 && !isAlphaASCII(name()[0]))
 216                 return;
 217
 218         os.pendingSpace(true);
 219 }
 220
 221
 222 void InsetMathSymbol::infoize2(odocstream & os) const
 223 {
 224         os << from_ascii("Symbol: ") << name();
 225 }
 226
 227
 228 } // namespace lyx