src/mathed/InsetMathString.cpp

   1 /**
   2  * \file InsetMathString.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 "InsetMathString.h"
  14 #include "MathStream.h"
  15 #include "MathSupport.h"
  16
  17 #include "Encoding.h"
  18
  19 #include "support/gettext.h"
  20 #include "support/lstrings.h"
  21 #include "support/textutils.h"
  22
  23
  24 namespace lyx {
  25
  26 InsetMathString::InsetMathString(docstring const & s)
  27         : str_(s)
  28 {}
  29
  30
  31 Inset * InsetMathString::clone() const
  32 {
  33         return new InsetMathString(*this);
  34 }
  35
  36
  37 void InsetMathString::metrics(MetricsInfo & mi, Dimension & dim) const
  38 {
  39         mathed_string_dim(mi.base.font, str_, dim);
  40 }
  41
  42
  43 void InsetMathString::draw(PainterInfo & pi, int x, int y) const
  44 {
  45         pi.draw(x, y, str_);
  46 }
  47
  48
  49 void InsetMathString::normalize(NormalStream & os) const
  50 {
  51         os << "[string " << str_ << ' ' << "mathalpha" << ']';
  52 }
  53
  54
  55 void InsetMathString::maple(MapleStream & os) const
  56 {
  57         if (/*code_ != LM_TC_VAR ||*/ str_.size() <= 1) {
  58                 os << ' ' << str_ << ' ';
  59                 return;
  60         }
  61
  62         // insert '*' between adjacent chars if type is LM_TC_VAR
  63         os << str_[0];
  64         for (size_t i = 1; i < str_.size(); ++i)
  65                 os << str_[i];
  66 }
  67
  68
  69 void InsetMathString::mathematica(MathematicaStream & os) const
  70 {
  71         os << ' ' << str_ << ' ';
  72 }
  73
  74
  75 void InsetMathString::octave(OctaveStream & os) const
  76 {
  77         if (/*code_ != LM_TC_VAR ||*/ str_.size() <= 1) {
  78                 os << ' ' << str_ << ' ';
  79                 return;
  80         }
  81
  82         // insert '*' between adjacent chars if type is LM_TC_VAR
  83         os << str_[0];
  84         for (size_t i = 1; i < str_.size(); ++i)
  85                 os << str_[i];
  86 }
  87
  88
  89 void InsetMathString::mathmlize(MathStream & os) const
  90 {
  91 /*
  92         if (code_ == LM_TC_VAR)
  93                 os << "<mi> " << str_ << " </mi>";
  94         else if (code_ == LM_TC_CONST)
  95                 os << "<mn> " << str_ << " </mn>";
  96         else if (code_ == LM_TC_RM || code_ == LM_TC_TEXTRM)
  97                 os << "<mtext> " << str_ <<  " </mtext>";
  98         else
  99 */
 100                 os << str_;
 101 }
 102
 103
 104 void InsetMathString::write(WriteStream & os) const
 105 {
 106         if (!os.latex()) {
 107                 os << str_;
 108                 return;
 109         }
 110
 111         docstring::const_iterator cit = str_.begin();
 112         docstring::const_iterator end = str_.end();
 113
 114         // We may already be inside an \ensuremath command.
 115         bool in_forced_mode = os.pendingBrace();
 116
 117         // Track italic shape inside \lyxmathsym
 118         bool mathalpha = false;
 119
 120         // We will take care of matching braces.
 121         os.pendingBrace(false);
 122
 123         while (cit != end) {
 124                 bool mathmode = in_forced_mode ? os.textMode() : !os.textMode();
 125                 char_type const c = *cit;
 126                 docstring command(1, c);
 127                 try {
 128                         if (c < 0x80 || Encodings::latexMathChar(c, mathmode, os.encoding(), command)) {
 129                                 if (os.textMode()) {
 130                                         if (in_forced_mode) {
 131                                                 // we were inside \lyxmathsym
 132                                                 os << '}';
 133                                                 os.textMode(false);
 134                                                 in_forced_mode = false;
 135                                         }
 136                                         if (c >= 0x80 && os.textMode()) {
 137                                                 os << "\\ensuremath{";
 138                                                 os.textMode(false);
 139                                                 in_forced_mode = true;
 140                                         }
 141                                 } else if (c < 0x80 && in_forced_mode) {
 142                                         // we were inside \ensuremath
 143                                         os << '}';
 144                                         os.textMode(true);
 145                                         in_forced_mode = false;
 146                                 }
 147                         } else if (!os.textMode()) {
 148                                         if (in_forced_mode) {
 149                                                 // we were inside \ensuremath
 150                                                 os << '}';
 151                                                 in_forced_mode = false;
 152                                         } else {
 153                                                 mathalpha = Encodings::isMathAlpha(c);
 154                                                 if (mathalpha)
 155                                                         os << "\\lyxmathsym*{";
 156                                                 else
 157                                                         os << "\\lyxmathsym{";
 158                                                 in_forced_mode = true;
 159                                         }
 160                                         os.textMode(true);
 161                         } else if (in_forced_mode && mathalpha != Encodings::isMathAlpha(c)) {
 162                                 // we are already inside \lyxmathsym but
 163                                 // have to change the output shape
 164                                 mathalpha = !mathalpha;
 165                                 if (mathalpha)
 166                                         os << "}\\lyxmathsym*{";
 167                                 else
 168                                         os << "}\\lyxmathsym{";
 169                         }
 170                         os << command;
 171                         // We may need a space if the command contains a macro
 172                         // and the last char is ASCII.
 173                         if (lyx::support::contains(command, '\\')
 174                             && isAlphaASCII(command[command.size() - 1]))
 175                                 os.pendingSpace(true);
 176                 } catch (EncodingException & e) {
 177                         if (os.dryrun()) {
 178                                 // FIXME: this is OK for View->Source
 179                                 // but math preview will likely fail.
 180                                 os << "<" << _("LyX Warning: ")
 181                                    << _("uncodable character") << " '";
 182                                 os << docstring(1, e.failed_char);
 183                                 os << "'>";
 184                         } else {
 185                                 // throw again
 186                                 throw(e);
 187                         }
 188                 }
 189                 ++cit;
 190         }
 191
 192         if (in_forced_mode && os.textMode()) {
 193                 // We have to care for closing \lyxmathsym
 194                 os << '}';
 195                 os.textMode(false);
 196         } else {
 197                 os.pendingBrace(in_forced_mode);
 198         }
 199 }
 200
 201
 202 } // namespace lyx