src/mathed/MathFactory.cpp

   1 /**
   2  * \file MathFactory.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 "MathFactory.h"
  14
  15 #include "InsetMathAMSArray.h"
  16 #include "InsetMathArray.h"
  17 #include "InsetMathBoldSymbol.h"
  18 #include "InsetMathBox.h"
  19 #include "InsetMathCases.h"
  20 #include "InsetMathColor.h"
  21 #include "InsetMathDecoration.h"
  22 #include "InsetMathDots.h"
  23 #include "InsetMathEnsureMath.h"
  24 #include "InsetMathFont.h"
  25 #include "InsetMathFontOld.h"
  26 #include "InsetMathFrac.h"
  27 #include "InsetMathKern.h"
  28 #include "InsetMathLefteqn.h"
  29 #include "InsetMathOverset.h"
  30 #include "InsetMathPhantom.h"
  31 #include "InsetMathRef.h"
  32 #include "InsetMathRoot.h"
  33 #include "InsetMathSize.h"
  34 #include "InsetMathSpace.h"
  35 #include "InsetMathSpecialChar.h"
  36 #include "InsetMathSplit.h"
  37 #include "InsetMathSqrt.h"
  38 #include "InsetMathStackrel.h"
  39 #include "InsetMathSubstack.h"
  40 #include "InsetMathSymbol.h"
  41 #include "InsetMathTabular.h"
  42 #include "InsetMathUnderset.h"
  43 #include "InsetMathUnknown.h"
  44 #include "InsetMathHull.h"
  45 #include "InsetMathXArrow.h"
  46 #include "InsetMathXYMatrix.h"
  47 #include "MacroTable.h"
  48 #include "MathMacro.h"
  49 #include "MathMacroArgument.h"
  50 #include "MathParser.h"
  51 #include "MathStream.h"
  52 #include "MathSupport.h"
  53
  54 #include "insets/InsetCommand.h"
  55 #include "insets/InsetSpace.h"
  56
  57 #include "support/debug.h"
  58 #include "support/docstream.h"
  59 #include "support/FileName.h"
  60 #include "support/filetools.h" // LibFileSearch
  61 #include "support/lstrings.h"
  62
  63 #include "frontends/FontLoader.h"
  64
  65 #include "Buffer.h"
  66 #include "BufferParams.h"
  67 #include "Encoding.h"
  68 #include "LyX.h" // use_gui
  69 #include "OutputParams.h"
  70
  71 using namespace std;
  72 using namespace lyx::support;
  73
  74 namespace lyx {
  75
  76 bool has_math_fonts;
  77
  78
  79 namespace {
  80
  81 MathWordList theWordList;
  82
  83
  84 bool isMathFontAvailable(docstring & name)
  85 {
  86         if (!use_gui)
  87                 return false;
  88
  89         FontInfo f;
  90         augmentFont(f, name);
  91
  92         // Do we have the font proper?
  93         if (theFontLoader().available(f))
  94                 return true;
  95
  96         // can we fake it?
  97         if (name == "eufrak") {
  98                 name = from_ascii("lyxfakefrak");
  99                 return true;
 100         }
 101
 102         LYXERR(Debug::MATHED,
 103                 "font " << to_utf8(name) << " not available and I can't fake it");
 104         return false;
 105 }
 106
 107
 108 void initSymbols()
 109 {
 110         FileName const filename = libFileSearch(string(), "symbols");
 111         LYXERR(Debug::MATHED, "read symbols from " << filename);
 112         if (filename.empty()) {
 113                 lyxerr << "Could not find symbols file" << endl;
 114                 return;
 115         }
 116
 117         ifstream fs(filename.toFilesystemEncoding().c_str());
 118         string line;
 119         bool skip = false;
 120         while (getline(fs, line)) {
 121                 int charid     = 0;
 122                 int fallbackid = 0;
 123                 if (line.empty() || line[0] == '#')
 124                         continue;
 125
 126                 // special case of iffont/else/endif
 127                 if (line.size() >= 7 && line.substr(0, 6) == "iffont") {
 128                         istringstream is(line);
 129                         string tmp;
 130                         is >> tmp;
 131                         is >> tmp;
 132                         docstring t = from_utf8(tmp);
 133                         skip = !isMathFontAvailable(t);
 134                         continue;
 135                 } else if (line.size() >= 4 && line.substr(0, 4) == "else") {
 136                         skip = !skip;
 137                 } else if (line.size() >= 5 && line.substr(0, 5) == "endif") {
 138                         skip = false;
 139                         continue;
 140                 } else if (skip)
 141                         continue;
 142
 143                 // special case of pre-defined macros
 144                 if (line.size() > 8 && line.substr(0, 5) == "\\def\\") {
 145                         //lyxerr << "macro definition: '" << line << '\'' << endl;
 146                         istringstream is(line);
 147                         string macro;
 148                         string requires;
 149                         is >> macro >> requires;
 150                         MacroTable::globalMacros().insert(0, from_utf8(macro), requires);
 151                         continue;
 152                 }
 153
 154                 idocstringstream is(from_utf8(line));
 155                 latexkeys tmp;
 156                 is >> tmp.name >> tmp.inset;
 157                 if (isFontName(tmp.inset))
 158                         is >> charid >> fallbackid >> tmp.extra >> tmp.xmlname;
 159                 else
 160                         is >> tmp.extra;
 161                 // requires is optional
 162                 if (is)
 163                         is >> tmp.requires;
 164                 else {
 165                         LYXERR(Debug::MATHED, "skipping line '" << line << "'\n"
 166                                 << to_utf8(tmp.name) << ' ' << to_utf8(tmp.inset) << ' '
 167                                 << to_utf8(tmp.extra));
 168                         continue;
 169                 }
 170
 171                 if (isFontName(tmp.inset)) {
 172                         // tmp.inset _is_ the fontname here.
 173                         // create fallbacks if necessary
 174
 175                         // store requirements as long as we can
 176                         if (tmp.requires.empty()) {
 177                                 if (tmp.inset == "msa" || tmp.inset == "msb")
 178                                         tmp.requires = from_ascii("amssymb");
 179                                 else if (tmp.inset == "wasy")
 180                                         tmp.requires = from_ascii("wasysym");
 181                         }
 182
 183                         // symbol font is not available sometimes
 184                         docstring symbol_font = from_ascii("lyxsymbol");
 185
 186                         if (tmp.extra == "func" || tmp.extra == "funclim" || tmp.extra == "special") {
 187                                 LYXERR(Debug::MATHED, "symbol abuse for " << to_utf8(tmp.name));
 188                                 tmp.draw = tmp.name;
 189                         } else if (isMathFontAvailable(tmp.inset)) {
 190                                 LYXERR(Debug::MATHED, "symbol available for " << to_utf8(tmp.name));
 191                                 tmp.draw.push_back(char_type(charid));
 192                         } else if (fallbackid && isMathFontAvailable(symbol_font)) {
 193                                 if (tmp.inset == "cmex")
 194                                         tmp.inset = from_ascii("lyxsymbol");
 195                                 else
 196                                         tmp.inset = from_ascii("lyxboldsymbol");
 197                                 LYXERR(Debug::MATHED, "symbol fallback for " << to_utf8(tmp.name));
 198                                 tmp.draw.push_back(char_type(fallbackid));
 199                         } else {
 200                                 LYXERR(Debug::MATHED, "faking " << to_utf8(tmp.name));
 201                                 tmp.draw = tmp.name;
 202                                 tmp.inset = from_ascii("lyxtex");
 203                         }
 204                 } else {
 205                         // it's a proper inset
 206                         LYXERR(Debug::MATHED, "inset " << to_utf8(tmp.inset)
 207                                               << " used for " << to_utf8(tmp.name));
 208                 }
 209
 210                 if (theWordList.find(tmp.name) != theWordList.end())
 211                         LYXERR(Debug::MATHED, "readSymbols: inset " << to_utf8(tmp.name)
 212                                 << " already exists.");
 213                 else
 214                         theWordList[tmp.name] = tmp;
 215
 216                 LYXERR(Debug::MATHED, "read symbol '" << to_utf8(tmp.name)
 217                         << "  inset: " << to_utf8(tmp.inset)
 218                         << "  draw: " << int(tmp.draw.empty() ? 0 : tmp.draw[0])
 219                         << "  extra: " << to_utf8(tmp.extra)
 220                         << "  requires: " << to_utf8(tmp.requires) << '\'');
 221         }
 222         docstring tmp = from_ascii("cmm");
 223         docstring tmp2 = from_ascii("cmsy");
 224         has_math_fonts = isMathFontAvailable(tmp) && isMathFontAvailable(tmp2);
 225 }
 226
 227
 228 bool isSpecialChar(docstring const & name)
 229 {
 230         if (name.size() != 1)
 231                 return  name == "textasciicircum" || name == "mathcircumflex" ||
 232                         name == "textasciitilde"  || name == "textbackslash";
 233
 234         char_type const c = name.at(0);
 235         return  c == '{' || c == '}' || c == '&' || c == '$' ||
 236                 c == '#' || c == '%' || c == '_' || c == ' ';
 237 }
 238
 239
 240 } // namespace anon
 241
 242 MathWordList const & mathedWordList()
 243 {
 244         return theWordList;
 245 }
 246
 247
 248 void initMath()
 249 {
 250         static bool initialized = false;
 251         if (!initialized) {
 252                 initialized = true;
 253                 initParser();
 254                 initSymbols();
 255         }
 256 }
 257
 258
 259 bool ensureMath(WriteStream & os, bool needs_math_mode, bool macro)
 260 {
 261         bool brace = os.pendingBrace();
 262         os.pendingBrace(false);
 263         if (!os.latex())
 264                 return brace;
 265         if (os.textMode() && needs_math_mode) {
 266                 os << "\\ensuremath{";
 267                 os.textMode(false);
 268                 brace = true;
 269         } else if (macro && brace && !needs_math_mode) {
 270                 // This is a user defined macro, but not a MathMacro, so we
 271                 // cannot be sure what mode is needed. As it was entered in
 272                 // a text box, we restore the text mode.
 273                 os << '}';
 274                 os.textMode(true);
 275                 brace = false;
 276         }
 277         return brace;
 278 }
 279
 280
 281 int ensureMode(WriteStream & os, InsetMath::mode_type mode, bool locked)
 282 {
 283         bool textmode = mode == InsetMath::TEXT_MODE;
 284         if (os.latex() && textmode && os.pendingBrace()) {
 285                 os.os() << '}';
 286                 os.pendingBrace(false);
 287                 os.pendingSpace(false);
 288                 os.textMode(true);
 289         }
 290         int oldmodes = os.textMode() ? 1 : 0;
 291         os.textMode(textmode);
 292         oldmodes |= os.lockedMode() ? 2 : 0;
 293         os.lockedMode(locked);
 294         return oldmodes;
 295 }
 296
 297
 298 latexkeys const * in_word_set(docstring const & str)
 299 {
 300         MathWordList::iterator it = theWordList.find(str);
 301         return it != theWordList.end() ? &(it->second) : 0;
 302 }
 303
 304
 305 MathAtom createInsetMath(char const * const s, Buffer * buf)
 306 {
 307         return createInsetMath(from_utf8(s), buf);
 308 }
 309
 310
 311 MathAtom createInsetMath(docstring const & s, Buffer * buf)
 312 {
 313         //lyxerr << "creating inset with name: '" << to_utf8(s) << '\'' << endl;
 314         if ((s == "ce" || s == "cf") && buf
 315             && buf->params().use_mhchem == BufferParams::package_off)
 316                 return MathAtom(new MathMacro(buf, s));
 317
 318         latexkeys const * l = in_word_set(s);
 319         if (l) {
 320                 docstring const & inset = l->inset;
 321                 //lyxerr << " found inset: '" << inset << '\'' << endl;
 322                 if (inset == "ref")
 323                         return MathAtom(new InsetMathRef(buf, l->name));
 324                 if (inset == "overset")
 325                         return MathAtom(new InsetMathOverset(buf));
 326                 if (inset == "underset")
 327                         return MathAtom(new InsetMathUnderset(buf));
 328                 if (inset == "decoration")
 329                         return MathAtom(new InsetMathDecoration(buf, l));
 330                 if (inset == "space")
 331                         return MathAtom(new InsetMathSpace(to_ascii(l->name), ""));
 332                 if (inset == "dots")
 333                         return MathAtom(new InsetMathDots(l));
 334                 if (inset == "mbox")
 335                         // return MathAtom(new InsetMathMBox);
 336                         // InsetMathMBox is proposed to replace InsetMathBox,
 337                         // but is not ready yet (it needs a BufferView for
 338                         // construction)
 339                         return MathAtom(new InsetMathBox(buf, l->name));
 340 //              if (inset == "fbox")
 341 //                      return MathAtom(new InsetMathFBox(l));
 342                 if (inset == "style")
 343                         return MathAtom(new InsetMathSize(buf, l));
 344                 if (inset == "font")
 345                         return MathAtom(new InsetMathFont(buf, l));
 346                 if (inset == "oldfont")
 347                         return MathAtom(new InsetMathFontOld(buf, l));
 348                 if (inset == "matrix")
 349                         return MathAtom(new InsetMathAMSArray(buf, s));
 350                 if (inset == "split")
 351                         return MathAtom(new InsetMathSplit(buf, s));
 352                 if (inset == "big")
 353                         // we can't create a InsetMathBig, since the argument
 354                         // is missing.
 355                         return MathAtom(new InsetMathUnknown(s));
 356                 return MathAtom(new InsetMathSymbol(l));
 357         }
 358
 359         if (s.size() == 2 && s[0] == '#' && s[1] >= '1' && s[1] <= '9')
 360                 return MathAtom(new MathMacroArgument(s[1] - '0'));
 361         if (s.size() == 3 && s[0] == '\\' && s[1] == '#'
 362                         && s[2] >= '1' && s[2] <= '9')
 363                 return MathAtom(new MathMacroArgument(s[2] - '0'));
 364         if (s == "boxed")
 365                 return MathAtom(new InsetMathBoxed(buf));
 366         if (s == "fbox")
 367                 return MathAtom(new InsetMathFBox(buf));
 368         if (s == "framebox")
 369                 return MathAtom(new InsetMathMakebox(buf, true));
 370         if (s == "makebox")
 371                 return MathAtom(new InsetMathMakebox(buf, false));
 372         if (s == "kern")
 373                 return MathAtom(new InsetMathKern);
 374         if (s.substr(0, 8) == "xymatrix") {
 375                 char spacing_code = '\0';
 376                 Length spacing;
 377                 size_t const len = s.length();
 378                 size_t i = 8;
 379                 if (i < len && s[i] == '@') {
 380                         ++i;
 381                         if (i < len) {
 382                                 switch (s[i]) {
 383                                 case 'R':
 384                                 case 'C':
 385                                 case 'M':
 386                                 case 'W':
 387                                 case 'H':
 388                                 case 'L':
 389                                         spacing_code = static_cast<char>(s[i]);
 390                                         ++i;
 391                                         break;
 392                                 }
 393                         }
 394                         if (i < len && s[i] == '=') {
 395                                 ++i;
 396                                 spacing = Length(to_ascii(s.substr(i)));
 397                         }
 398                 }
 399                 return MathAtom(new InsetMathXYMatrix(buf, spacing, spacing_code));
 400         }
 401         if (s == "xrightarrow" || s == "xleftarrow")
 402                 return MathAtom(new InsetMathXArrow(buf, s));
 403         if (s == "split" || s == "gathered" || s == "aligned" || s == "alignedat")
 404                 return MathAtom(new InsetMathSplit(buf, s));
 405         if (s == "cases")
 406                 return MathAtom(new InsetMathCases(buf));
 407         if (s == "substack")
 408                 return MathAtom(new InsetMathSubstack(buf));
 409         if (s == "subarray" || s == "array")
 410                 return MathAtom(new InsetMathArray(buf, s, 1, 1));
 411         if (s == "sqrt")
 412                 return MathAtom(new InsetMathSqrt(buf));
 413         if (s == "root")
 414                 return MathAtom(new InsetMathRoot(buf));
 415         if (s == "tabular")
 416                 return MathAtom(new InsetMathTabular(buf, s, 1, 1));
 417         if (s == "stackrel")
 418                 return MathAtom(new InsetMathStackrel(buf));
 419         if (s == "binom")
 420                 return MathAtom(new InsetMathBinom(buf, InsetMathBinom::BINOM));
 421         if (s == "dbinom")
 422                 return MathAtom(new InsetMathBinom(buf, InsetMathBinom::DBINOM));
 423         if (s == "tbinom")
 424                 return MathAtom(new InsetMathBinom(buf, InsetMathBinom::TBINOM));
 425         if (s == "choose")
 426                 return MathAtom(new InsetMathBinom(buf, InsetMathBinom::CHOOSE));
 427         if (s == "brace")
 428                 return MathAtom(new InsetMathBinom(buf, InsetMathBinom::BRACE));
 429         if (s == "brack")
 430                 return MathAtom(new InsetMathBinom(buf, InsetMathBinom::BRACK));
 431         if (s == "frac")
 432                 return MathAtom(new InsetMathFrac(buf));
 433         if (s == "cfrac")
 434                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRAC));
 435         if (s == "dfrac")
 436                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::DFRAC));
 437         if (s == "tfrac")
 438                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::TFRAC));
 439         if (s == "over")
 440                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::OVER));
 441         if (s == "nicefrac")
 442                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::NICEFRAC));
 443         if (s == "unitfrac")
 444                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNITFRAC));
 445         // These string values are only for math toolbar use, no LaTeX names
 446         if (s == "unitfracthree")
 447                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNITFRAC, 3));
 448         if (s == "unitone")
 449                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNIT, 1));
 450         if (s == "unittwo")
 451                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNIT));
 452         if (s == "cfracleft")
 453                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRACLEFT));
 454         if (s == "cfracright")
 455                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRACRIGHT));
 456         //if (s == "infer")
 457         //      return MathAtom(new MathInferInset);
 458         if (s == "atop")
 459                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::ATOP));
 460         if (s == "lefteqn")
 461                 return MathAtom(new InsetMathLefteqn(buf));
 462         if (s == "boldsymbol")
 463                 return MathAtom(new InsetMathBoldSymbol(buf, InsetMathBoldSymbol::AMS_BOLD));
 464         if (s == "bm")
 465                 return MathAtom(new InsetMathBoldSymbol(buf, InsetMathBoldSymbol::BM_BOLD));
 466         if (s == "heavysymbol" || s == "hm")
 467                 return MathAtom(new InsetMathBoldSymbol(buf, InsetMathBoldSymbol::BM_HEAVY));
 468         if (s == "color" || s == "normalcolor")
 469                 return MathAtom(new InsetMathColor(buf, true));
 470         if (s == "textcolor")
 471                 return MathAtom(new InsetMathColor(buf, false));
 472         if (s == "hphantom")
 473                 return MathAtom(new InsetMathPhantom(buf, InsetMathPhantom::hphantom));
 474         if (s == "phantom")
 475                 return MathAtom(new InsetMathPhantom(buf, InsetMathPhantom::phantom));
 476         if (s == "vphantom")
 477                 return MathAtom(new InsetMathPhantom(buf, InsetMathPhantom::vphantom));
 478         if (s == "ensuremath")
 479                 return MathAtom(new InsetMathEnsureMath(buf));
 480         if (isSpecialChar(s))
 481                 return MathAtom(new InsetMathSpecialChar(s));
 482
 483         if (s == "regexp")
 484                 return MathAtom(new InsetMathHull(buf, hullRegexp));
 485
 486         return MathAtom(new MathMacro(buf, s));
 487 }
 488
 489
 490 bool createInsetMath_fromDialogStr(docstring const & str, MathData & ar)
 491 {
 492         // An example str:
 493         // "ref LatexCommand ref\nreference \"sec:Title\"\n\\end_inset\n\n";
 494         docstring name;
 495         docstring body = split(str, name, ' ');
 496
 497         if (name == "ref") {
 498                 InsetCommandParams icp(REF_CODE);
 499                 // FIXME UNICODE
 500                 InsetCommand::string2params("ref", to_utf8(str), icp);
 501                 mathed_parse_cell(ar, icp.getCommand());
 502         } else if (name == "mathspace") {
 503                 InsetSpaceParams isp(true);
 504                 InsetSpace::string2params(to_utf8(str), isp);
 505                 InsetSpace is(isp);
 506                 odocstringstream os;
 507                 Encoding const * const ascii = encodings.fromLyXName("ascii");
 508                 OutputParams op(ascii);
 509                 is.latex(os, op);
 510                 mathed_parse_cell(ar, os.str());
 511                 if (ar.size() == 2) {
 512                         // remove "{}"
 513                         if (ar[1].nucleus()->asBraceInset())
 514                                 ar.pop_back();
 515                 }
 516         } else
 517                 return false;
 518
 519         if (ar.size() != 1)
 520                 return false;
 521
 522         return ar[0].nucleus();
 523 }
 524
 525
 526 bool isAsciiOrMathAlpha(char_type c)
 527 {
 528         return c < 0x80 || Encodings::isMathAlpha(c);
 529 }
 530
 531
 532 } // namespace lyx