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 "MathFactory.h"
  15 #include "MathStream.h"
  16 #include "MathSupport.h"
  17
  18 #include "Encoding.h"
  19
  20 #include "support/debug.h"
  21 #include "support/gettext.h"
  22 #include "support/lassert.h"
  23 #include "support/lstrings.h"
  24 #include "support/textutils.h"
  25
  26 using lyx::support::escape;
  27
  28
  29 namespace lyx {
  30
  31 InsetMathString::InsetMathString(docstring const & s)
  32         : str_(s)
  33 {}
  34
  35
  36 Inset * InsetMathString::clone() const
  37 {
  38         return new InsetMathString(*this);
  39 }
  40
  41
  42 void InsetMathString::metrics(MetricsInfo & mi, Dimension & dim) const
  43 {
  44         mathed_string_dim(mi.base.font, str_, dim);
  45 }
  46
  47
  48 void InsetMathString::draw(PainterInfo & pi, int x, int y) const
  49 {
  50         pi.draw(x, y, str_);
  51 }
  52
  53
  54 void InsetMathString::normalize(NormalStream & os) const
  55 {
  56         os << "[string " << str_ << ' ' << "mathalpha" << ']';
  57 }
  58
  59
  60 void InsetMathString::maple(MapleStream & os) const
  61 {
  62         if (/*code_ != LM_TC_VAR ||*/ str_.size() <= 1) {
  63                 os << ' ' << str_ << ' ';
  64                 return;
  65         }
  66
  67         // insert '*' between adjacent chars if type is LM_TC_VAR
  68         os << str_[0];
  69         for (size_t i = 1; i < str_.size(); ++i)
  70                 os << str_[i];
  71 }
  72
  73
  74 void InsetMathString::mathematica(MathematicaStream & os) const
  75 {
  76         os << ' ' << str_ << ' ';
  77 }
  78
  79
  80 void InsetMathString::octave(OctaveStream & os) const
  81 {
  82         if (/*code_ != LM_TC_VAR ||*/ str_.size() <= 1) {
  83                 os << ' ' << str_ << ' ';
  84                 return;
  85         }
  86
  87         // insert '*' between adjacent chars if type is LM_TC_VAR
  88         os << str_[0];
  89         for (size_t i = 1; i < str_.size(); ++i)
  90                 os << str_[i];
  91 }
  92
  93
  94 void InsetMathString::mathmlize(MathStream &) const
  95 {
  96         // useless, no doubt, but we should not be here
  97         LATTEST(false);
  98 }
  99
 100
 101 void InsetMathString::write(WriteStream & os) const
 102 {
 103         if (!os.latex() || os.lockedMode()) {
 104                 os << (os.asciiOnly() ? escape(str_) : str_);
 105                 return;
 106         }
 107
 108         docstring::const_iterator cit = str_.begin();
 109         docstring::const_iterator end = str_.end();
 110
 111         // We may already be inside an \ensuremath command.
 112         bool in_forced_mode = os.pendingBrace();
 113
 114         // We will take care of matching braces.
 115         os.pendingBrace(false);
 116
 117         while (cit != end) {
 118                 bool mathmode = in_forced_mode ? os.textMode() : !os.textMode();
 119                 char_type const c = *cit;
 120                 docstring command(1, c);
 121                 try {
 122                         bool termination = false;
 123                         if (isASCII(c) ||
 124                             Encodings::latexMathChar(c, mathmode, os.encoding(), command, termination)) {
 125                                 if (os.textMode()) {
 126                                         if (in_forced_mode) {
 127                                                 // we were inside \lyxmathsym
 128                                                 os << '}';
 129                                                 os.textMode(false);
 130                                                 in_forced_mode = false;
 131                                         }
 132                                         if (!isASCII(c) && os.textMode()) {
 133                                                 os << "\\ensuremath{";
 134                                                 os.textMode(false);
 135                                                 in_forced_mode = true;
 136                                         }
 137                                 } else if (isASCII(c) && in_forced_mode) {
 138                                         // we were inside \ensuremath
 139                                         os << '}';
 140                                         os.textMode(true);
 141                                         in_forced_mode = false;
 142                                 }
 143                         } else if (!os.textMode()) {
 144                                         if (in_forced_mode) {
 145                                                 // we were inside \ensuremath
 146                                                 os << '}';
 147                                                 in_forced_mode = false;
 148                                         } else {
 149                                                 os << "\\lyxmathsym{";
 150                                                 in_forced_mode = true;
 151                                         }
 152                                         os.textMode(true);
 153                         }
 154                         os << command;
 155                         // We may need a space if the command contains a macro
 156                         // and the last char is ASCII.
 157                         if (termination)
 158                                 os.pendingSpace(true);
 159                 } catch (EncodingException const & e) {
 160                         switch (os.output()) {
 161                         case WriteStream::wsDryrun: {
 162                                 os << "<" << _("LyX Warning: ")
 163                                    << _("uncodable character") << " '";
 164                                 os << docstring(1, e.failed_char);
 165                                 os << "'>";
 166                                 break;
 167                         }
 168                         case WriteStream::wsPreview: {
 169                                 // indicate the encoding error by a boxed '?'
 170                                 os << "{\\fboxsep=1pt\\fbox{?}}";
 171                                 LYXERR0("Uncodable character" << " '"
 172                                         << docstring(1, e.failed_char)
 173                                         << "'");
 174                                 break;
 175                         }
 176                         case WriteStream::wsDefault:
 177                         default:
 178                                 // throw again
 179                                 throw(e);
 180                         }
 181                 }
 182                 ++cit;
 183         }
 184
 185         if (in_forced_mode && os.textMode()) {
 186                 // We have to care for closing \lyxmathsym
 187                 os << '}';
 188                 os.textMode(false);
 189         } else {
 190                 os.pendingBrace(in_forced_mode);
 191         }
 192 }
 193
 194
 195 } // namespace lyx