src/mathed/math_factory.C

   1 /**
   2  * \file math_factory.C
   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 "math_parser.h"
  14 #include "math_arrayinset.h"
  15 #include "math_amsarrayinset.h"
  16 #include "math_binominset.h"
  17 #include "math_boxinset.h"
  18 #include "math_casesinset.h"
  19 #include "math_decorationinset.h"
  20 #include "math_dotsinset.h"
  21 #include "math_ertinset.h"
  22 #include "math_fboxinset.h"
  23 #include "math_frameboxinset.h"
  24 #include "math_fontinset.h"
  25 #include "math_fontoldinset.h"
  26 #include "math_fracinset.h"
  27 #include "math_kerninset.h"
  28 #include "math_lefteqninset.h"
  29 #include "math_macro.h"
  30 #include "math_macrotable.h"
  31 #include "math_macrotemplate.h"
  32 #include "math_macroarg.h"
  33 #include "math_makeboxinset.h"
  34 #include "math_parboxinset.h"
  35 #include "math_rootinset.h"
  36 #include "math_sizeinset.h"
  37 #include "math_spaceinset.h"
  38 #include "math_splitinset.h"
  39 #include "math_sqrtinset.h"
  40 #include "math_stackrelinset.h"
  41 #include "math_substackinset.h"
  42 #include "math_symbolinset.h"
  43 #include "math_tabularinset.h"
  44 #include "math_undersetinset.h"
  45 #include "math_unknowninset.h"
  46 #include "math_xarrowinset.h"
  47
  48 //#include "insets/insetref.h"
  49 #include "ref_inset.h"
  50
  51 #include "metricsinfo.h"
  52 #include "math_data.h"
  53 #include "debug.h"
  54 #include "math_support.h"
  55 #include "Lsstream.h"
  56 #include "support/filetools.h" // LibFileSearch
  57 #include "support/lstrings.h"
  58 #include "frontends/lyx_gui.h"
  59
  60 #include <map>
  61 #include <fstream>
  62
  63 using namespace lyx::support;
  64
  65 using std::endl;
  66
  67 bool has_math_fonts;
  68
  69
  70 namespace {
  71
  72 // file scope
  73 typedef std::map<string, latexkeys> WordList;
  74 WordList theWordList;
  75
  76
  77 bool math_font_available(string & name)
  78 {
  79         LyXFont f;
  80         augmentFont(f, name);
  81
  82         // Do we have the font proper?
  83         if (lyx_gui::font_available(f))
  84                 return true;
  85
  86         // can we fake it?
  87         if (name == "eufrak") {
  88                 name = "lyxfakefrak";
  89                 return true;
  90         }
  91
  92         lyxerr[Debug::MATHED]
  93                 << "font " << name << " not available and I can't fake it"
  94                 << endl;
  95         return false;
  96 }
  97
  98
  99 void initSymbols()
 100 {
 101         string const filename = LibFileSearch(string(), "symbols");
 102         lyxerr[Debug::MATHED] << "read symbols from " << filename << endl;
 103         if (filename.empty()) {
 104                 lyxerr << "Could not find symbols file" << endl;
 105                 return;
 106         }
 107
 108         std::ifstream fs(filename.c_str());
 109         string line;
 110         bool skip = false;
 111         while (getline(fs, line)) {
 112                 int charid     = 0;
 113                 int fallbackid = 0;
 114                 if (!line.empty() && line[0] == '#')
 115                         continue;
 116
 117                 // special case of iffont/else/endif
 118                 if (line.size() >= 7 && line.substr(0, 6) == "iffont") {
 119                         istringstream is(STRCONV(line));
 120                         string tmp;
 121                         is >> tmp;
 122                         is >> tmp;
 123                         skip = !math_font_available(tmp);
 124                         continue;
 125                 } else if (line.size() >= 4 && line.substr(0, 4) == "else") {
 126                         skip = !skip;
 127                 } else if (line.size() >= 5 && line.substr(0, 5) == "endif") {
 128                         skip = false;
 129                         continue;
 130                 } else if (skip)
 131                         continue;
 132
 133                 // special case of pre-defined macros
 134                 if (line.size() > 8 && line.substr(0, 5) == "\\def\\") {
 135                         //lyxerr << "defining: '" << line << '\'' << endl;
 136                         istringstream is(STRCONV(line));
 137                         MathMacroTable::create(MathAtom(new MathMacroTemplate(is)));
 138                         continue;
 139                 }
 140
 141                 istringstream is(STRCONV(line));
 142                 latexkeys tmp;
 143                 is >> tmp.name >> tmp.inset;
 144                 if (isFontName(tmp.inset))
 145                         is >> charid >> fallbackid >> tmp.extra >> tmp.xmlname;
 146                 else
 147                         is >> tmp.extra;
 148                 if (!is) {
 149                         lyxerr[Debug::MATHED] << "skipping line '" << line << '\'' << endl;
 150                         lyxerr[Debug::MATHED]
 151                                 << tmp.name << ' ' << tmp.inset << ' ' << tmp.extra << endl;
 152                         continue;
 153                 }
 154
 155                 if (isFontName(tmp.inset)) {
 156                         // tmp.inset _is_ the fontname here.
 157                         // create fallbacks if necessary
 158
 159                         // symbol font is not available sometimes
 160                         string symbol_font = "lyxsymbol";
 161
 162                         if (tmp.extra == "func" || tmp.extra == "funclim" || tmp.extra == "special") {
 163                                 lyxerr[Debug::MATHED] << "symbol abuse for " << tmp.name << endl;
 164                                 tmp.draw = tmp.name;
 165                         } else if (math_font_available(tmp.inset)) {
 166                                 lyxerr[Debug::MATHED] << "symbol available for " << tmp.name << endl;
 167                                 tmp.draw += char(charid);
 168                         } else if (fallbackid && math_font_available(symbol_font)) {
 169                                 if (tmp.inset == "cmex")
 170                                         tmp.inset  = "lyxsymbol";
 171                                 else
 172                                         tmp.inset  = "lyxboldsymbol";
 173                                 lyxerr[Debug::MATHED] << "symbol fallback for " << tmp.name << endl;
 174                                 tmp.draw += char(fallbackid);
 175                         } else {
 176                                 lyxerr[Debug::MATHED] << "faking " << tmp.name << endl;
 177                                 tmp.draw = tmp.name;
 178                                 tmp.inset = "lyxtex";
 179                         }
 180                 } else {
 181                         // it's a proper inset
 182                         lyxerr[Debug::MATHED] << "inset " << tmp.inset
 183                                               << " used for " << tmp.name
 184                                               << endl;
 185                 }
 186
 187                 if (theWordList.find(tmp.name) != theWordList.end())
 188                         lyxerr[Debug::MATHED]
 189                                 << "readSymbols: inset " << tmp.name
 190                                 << " already exists." << endl;
 191                 else
 192                         theWordList[tmp.name] = tmp;
 193
 194                 lyxerr[Debug::MATHED]
 195                         << "read symbol '" << tmp.name
 196                         << "  inset: " << tmp.inset
 197                         << "  draw: " << int(tmp.draw.empty() ? 0 : tmp.draw[0])
 198                         << "  extra: " << tmp.extra
 199                         << '\'' << endl;
 200         }
 201         string tmp = "cmm";
 202         string tmp2 = "cmsy";
 203         has_math_fonts = math_font_available(tmp) && math_font_available(tmp2);
 204 }
 205
 206
 207 } // namespace anon
 208
 209
 210 void initMath()
 211 {
 212         static bool initialized = false;
 213         if (!initialized) {
 214                 initSymbols();
 215                 initialized = true;
 216         }
 217 }
 218
 219
 220 latexkeys const * in_word_set(string const & str)
 221 {
 222         WordList::iterator it = theWordList.find(str);
 223         //lyxerr << "looking up '" << str << "' found: "
 224         // << (it != theWordList.end()) << endl;
 225         return (it != theWordList.end()) ? &(it->second) : 0;
 226 }
 227
 228
 229 MathAtom createMathInset(string const & s)
 230 {
 231         lyxerr[Debug::MATHED] << "creating inset with name: '"
 232                               << s << '\'' << endl;;
 233         latexkeys const * l = in_word_set(s);
 234         if (l) {
 235                 string const & inset = l->inset;
 236                 lyxerr[Debug::MATHED] << " found inset: '" <<
 237                         inset << '\'' << endl;
 238                 if (inset == "ref")
 239                         return MathAtom(new RefInset(l->name));
 240                 if (inset == "underset")
 241                         return MathAtom(new MathUndersetInset);
 242                 if (inset == "decoration")
 243                         return MathAtom(new MathDecorationInset(l));
 244                 if (inset == "space")
 245                         return MathAtom(new MathSpaceInset(l->name));
 246                 if (inset == "dots")
 247                         return MathAtom(new MathDotsInset(l));
 248                 if (inset == "mbox")
 249                         return MathAtom(new MathBoxInset(l->name));
 250                 if (inset == "parbox")
 251                         return MathAtom(new MathParboxInset);
 252                 if (inset == "fbox")
 253                         return MathAtom(new MathFboxInset(l));
 254                 if (inset == "style")
 255                         return MathAtom(new MathSizeInset(l));
 256                 if (inset == "font")
 257                         return MathAtom(new MathFontInset(l));
 258                 if (inset == "oldfont")
 259                         return MathAtom(new MathFontOldInset(l));
 260                 if (inset == "matrix")
 261                         return MathAtom(new MathAMSArrayInset(s));
 262                 return MathAtom(new MathSymbolInset(l));
 263         }
 264
 265         if (s.size() == 2 && s[0] == '#' && s[1] >= '1' && s[1] <= '9')
 266                 return MathAtom(new MathMacroArgument(s[1] - '0'));
 267         if (s.size() == 3 && s[0] == '\\' && s[1] == '#'
 268                         && s[2] >= '1' && s[2] <= '9')
 269                 return MathAtom(new MathMacroArgument(s[2] - '0'));
 270         if (s == "framebox")
 271                 return MathAtom(new MathFrameboxInset);
 272         if (s == "makebox")
 273                 return MathAtom(new MathMakeboxInset);
 274         if (s == "kern")
 275                 return MathAtom(new MathKernInset);
 276         if (s == "xrightarrow" || s == "xleftarrow")
 277                 return MathAtom(new MathXArrowInset(s));
 278         if (s == "split" || s == "gathered" || s == "aligned")
 279                 return MathAtom(new MathSplitInset(s));
 280         if (s == "cases")
 281                 return MathAtom(new MathCasesInset);
 282         if (s == "substack")
 283                 return MathAtom(new MathSubstackInset);
 284         if (s == "subarray" || s == "array")
 285                 return MathAtom(new MathArrayInset(s, 1, 1));
 286         if (s == "sqrt")
 287                 return MathAtom(new MathSqrtInset);
 288         if (s == "root")
 289                 return MathAtom(new MathRootInset);
 290         if (s == "tabular")
 291                 return MathAtom(new MathTabularInset(s, 1, 1));
 292         if (s == "stackrel")
 293                 return MathAtom(new MathStackrelInset);
 294         if (s == "binom" || s == "choose")
 295                 return MathAtom(new MathBinomInset(s == "choose"));
 296         if (s == "over" || s == "frac")
 297                 return MathAtom(new MathFracInset);
 298         //if (s == "infer")
 299         //      return MathAtom(new MathInferInset);
 300         if (s == "atop")
 301                 return MathAtom(new MathFracInset(true));
 302         if (s == "lefteqn")
 303                 return MathAtom(new MathLefteqnInset);
 304         if (s == "lyxert")
 305                 return MathAtom(new MathErtInset);
 306
 307         if (MathMacroTable::has(s))
 308                 return MathAtom(new MathMacro(s));
 309
 310         //lyxerr[Debug::MATHED] << "creating inset 2 with name: '" << s << '\'' << endl;
 311         return MathAtom(new MathUnknownInset(s));
 312 }
 313
 314
 315 bool createMathInset_fromDialogStr(string const & str, MathArray & ar)
 316 {
 317         // An example str:
 318         // "ref LatexCommand \\ref{sec:Title}\n\\end_inset\n\n";
 319         string name;
 320         string body = split(str, name, ' ');
 321
 322         if (name != "ref" )
 323                 return false;
 324
 325         // body comes with a head "LatexCommand " and a
 326         // tail "\nend_inset\n\n". Strip them off.
 327         string trimmed;
 328         body = split(body, trimmed, ' ');
 329         split(body, trimmed, '\n');
 330
 331         mathed_parse_cell(ar, trimmed);
 332         if (ar.size() != 1)
 333                 return false;
 334
 335         return ar[0].nucleus();
 336 }