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 "InsetMathDiagram.h"
  48 #include "MacroTable.h"
  49 #include "MathMacro.h"
  50 #include "MathMacroArgument.h"
  51 #include "MathParser.h"
  52 #include "MathStream.h"
  53 #include "MathSupport.h"
  54
  55 #include "insets/InsetCommand.h"
  56 #include "insets/InsetSpace.h"
  57
  58 #include "support/debug.h"
  59 #include "support/docstream.h"
  60 #include "support/FileName.h"
  61 #include "support/filetools.h" // LibFileSearch
  62 #include "support/lstrings.h"
  63
  64 #include "frontends/FontLoader.h"
  65
  66 #include "Buffer.h"
  67 #include "BufferParams.h"
  68 #include "Encoding.h"
  69 #include "LyX.h" // use_gui
  70 #include "OutputParams.h"
  71
  72 using namespace std;
  73 using namespace lyx::support;
  74
  75 namespace lyx {
  76
  77 bool has_math_fonts;
  78
  79
  80 namespace {
  81
  82 MathWordList theMathWordList;
  83
  84
  85 bool isMathFontAvailable(docstring & name)
  86 {
  87         if (!use_gui)
  88                 return false;
  89
  90         FontInfo f;
  91         augmentFont(f, name);
  92
  93         // Do we have the font proper?
  94         if (theFontLoader().available(f))
  95                 return true;
  96
  97         // can we fake it?
  98         if (name == "eufrak") {
  99                 name = from_ascii("lyxfakefrak");
 100                 return true;
 101         }
 102
 103         LYXERR(Debug::MATHED,
 104                 "font " << to_utf8(name) << " not available and I can't fake it");
 105         return false;
 106 }
 107
 108
 109 void initSymbols()
 110 {
 111         FileName const filename = libFileSearch(string(), "symbols");
 112         LYXERR(Debug::MATHED, "read symbols from " << filename);
 113         if (filename.empty()) {
 114                 lyxerr << "Could not find symbols file" << endl;
 115                 return;
 116         }
 117
 118         ifstream fs(filename.toFilesystemEncoding().c_str());
 119         string line;
 120         bool skip = false;
 121         while (getline(fs, line)) {
 122                 int charid     = 0;
 123                 int fallbackid = 0;
 124                 if (line.empty() || line[0] == '#')
 125                         continue;
 126
 127                 // special case of iffont/else/endif
 128                 if (line.size() >= 7 && line.substr(0, 6) == "iffont") {
 129                         istringstream is(line);
 130                         string tmp;
 131                         is >> tmp;
 132                         is >> tmp;
 133                         docstring t = from_utf8(tmp);
 134                         skip = !isMathFontAvailable(t);
 135                         continue;
 136                 } else if (line.size() >= 4 && line.substr(0, 4) == "else") {
 137                         skip = !skip;
 138                         continue;
 139                 } else if (line.size() >= 5 && line.substr(0, 5) == "endif") {
 140                         skip = false;
 141                         continue;
 142                 } else if (skip)
 143                         continue;
 144
 145                 // special case of pre-defined macros
 146                 if (line.size() > 8 && line.substr(0, 5) == "\\def\\") {
 147                         //lyxerr << "macro definition: '" << line << '\'' << endl;
 148                         istringstream is(line);
 149                         string macro;
 150                         string requires;
 151                         is >> macro >> requires;
 152                         MacroTable::globalMacros().insert(0, from_utf8(macro), requires);
 153                         continue;
 154                 }
 155
 156                 idocstringstream is(from_utf8(line));
 157                 latexkeys tmp;
 158                 is >> tmp.name >> tmp.inset;
 159                 if (isFontName(tmp.inset))
 160                         is >> charid >> fallbackid >> tmp.extra >> tmp.xmlname;
 161                 else
 162                         is >> tmp.extra;
 163                 // requires is optional
 164                 if (is)
 165                         is >> tmp.requires;
 166                 else {
 167                         LYXERR(Debug::MATHED, "skipping line '" << line << "'\n"
 168                                 << to_utf8(tmp.name) << ' ' << to_utf8(tmp.inset) << ' '
 169                                 << to_utf8(tmp.extra));
 170                         continue;
 171                 }
 172
 173                 if (isFontName(tmp.inset)) {
 174                         // tmp.inset _is_ the fontname here.
 175                         // create fallbacks if necessary
 176
 177                         // store requirements as long as we can
 178                         if (tmp.requires.empty()) {
 179                                 if (tmp.inset == "msa" || tmp.inset == "msb")
 180                                         tmp.requires = from_ascii("amssymb");
 181                                 else if (tmp.inset == "wasy")
 182                                         tmp.requires = from_ascii("wasysym");
 183                                 else if (tmp.inset == "mathscr")
 184                                         tmp.requires = from_ascii("mathrsfs");
 185                         }
 186
 187                         // symbol font is not available sometimes
 188                         docstring symbol_font = from_ascii("lyxsymbol");
 189
 190                         if (tmp.extra == "func" || tmp.extra == "funclim" || tmp.extra == "special") {
 191                                 LYXERR(Debug::MATHED, "symbol abuse for " << to_utf8(tmp.name));
 192                                 tmp.draw = tmp.name;
 193                         } else if (isMathFontAvailable(tmp.inset)) {
 194                                 LYXERR(Debug::MATHED, "symbol available for " << to_utf8(tmp.name));
 195                                 tmp.draw.push_back(char_type(charid));
 196                         } else if (fallbackid && isMathFontAvailable(symbol_font)) {
 197                                 if (tmp.inset == "cmex")
 198                                         tmp.inset = from_ascii("lyxsymbol");
 199                                 else
 200                                         tmp.inset = from_ascii("lyxboldsymbol");
 201                                 LYXERR(Debug::MATHED, "symbol fallback for " << to_utf8(tmp.name));
 202                                 tmp.draw.push_back(char_type(fallbackid));
 203                         } else {
 204                                 LYXERR(Debug::MATHED, "faking " << to_utf8(tmp.name));
 205                                 tmp.draw = tmp.name;
 206                                 tmp.inset = from_ascii("lyxtex");
 207                         }
 208                 } else {
 209                         // it's a proper inset
 210                         LYXERR(Debug::MATHED, "inset " << to_utf8(tmp.inset)
 211                                               << " used for " << to_utf8(tmp.name));
 212                 }
 213
 214                 if (theMathWordList.find(tmp.name) != theMathWordList.end())
 215                         LYXERR(Debug::MATHED, "readSymbols: inset " << to_utf8(tmp.name)
 216                                 << " already exists.");
 217                 else
 218                         theMathWordList[tmp.name] = tmp;
 219
 220                 LYXERR(Debug::MATHED, "read symbol '" << to_utf8(tmp.name)
 221                         << "  inset: " << to_utf8(tmp.inset)
 222                         << "  draw: " << int(tmp.draw.empty() ? 0 : tmp.draw[0])
 223                         << "  extra: " << to_utf8(tmp.extra)
 224                         << "  requires: " << to_utf8(tmp.requires) << '\'');
 225         }
 226         docstring tmp = from_ascii("cmm");
 227         docstring tmp2 = from_ascii("cmsy");
 228         has_math_fonts = isMathFontAvailable(tmp) && isMathFontAvailable(tmp2);
 229 }
 230
 231
 232 bool isSpecialChar(docstring const & name)
 233 {
 234         if (name.size() != 1)
 235                 return  name == "textasciicircum" || name == "mathcircumflex" ||
 236                         name == "textasciitilde"  || name == "textbackslash";
 237
 238         char_type const c = name.at(0);
 239         return  c == '{' || c == '}' || c == '&' || c == '$' ||
 240                 c == '#' || c == '%' || c == '_' || c == ' ';
 241 }
 242
 243
 244 } // namespace anon
 245
 246 MathWordList const & mathedWordList()
 247 {
 248         return theMathWordList;
 249 }
 250
 251
 252 void initMath()
 253 {
 254         static bool initialized = false;
 255         if (!initialized) {
 256                 initialized = true;
 257                 initParser();
 258                 initSymbols();
 259         }
 260 }
 261
 262
 263 bool ensureMath(WriteStream & os, bool needs_math_mode, bool macro)
 264 {
 265         bool brace = os.pendingBrace();
 266         os.pendingBrace(false);
 267         if (!os.latex())
 268                 return brace;
 269         if (os.textMode() && needs_math_mode) {
 270                 os << "\\ensuremath{";
 271                 os.textMode(false);
 272                 brace = true;
 273         } else if (macro && brace && !needs_math_mode) {
 274                 // This is a user defined macro, but not a MathMacro, so we
 275                 // cannot be sure what mode is needed. As it was entered in
 276                 // a text box, we restore the text mode.
 277                 os << '}';
 278                 os.textMode(true);
 279                 brace = false;
 280         }
 281         return brace;
 282 }
 283
 284
 285 int ensureMode(WriteStream & os, InsetMath::mode_type mode,
 286                 bool locked, bool ascii)
 287 {
 288         bool textmode = mode == InsetMath::TEXT_MODE;
 289         if (os.latex() && textmode && os.pendingBrace()) {
 290                 os.os() << '}';
 291                 os.pendingBrace(false);
 292                 os.pendingSpace(false);
 293                 os.textMode(true);
 294         }
 295         int oldmodes = os.textMode() ? 0x01 : 0;
 296         os.textMode(textmode);
 297         oldmodes |= os.lockedMode() ? 0x02 : 0;
 298         os.lockedMode(locked);
 299         oldmodes |= os.asciiOnly() ? 0x04 : 0;
 300         os.asciiOnly(ascii);
 301         return oldmodes;
 302 }
 303
 304
 305 latexkeys const * in_word_set(docstring const & str)
 306 {
 307         MathWordList::iterator it = theMathWordList.find(str);
 308         return it != theMathWordList.end() ? &(it->second) : 0;
 309 }
 310
 311
 312 MathAtom createInsetMath(char const * const s, Buffer * buf)
 313 {
 314         return createInsetMath(from_utf8(s), buf);
 315 }
 316
 317
 318 MathAtom createInsetMath(docstring const & s, Buffer * buf)
 319 {
 320         //lyxerr << "creating inset with name: '" << to_utf8(s) << '\'' << endl;
 321         if ((s == "ce" || s == "cf") && buf
 322             && buf->params().use_mhchem == BufferParams::package_off)
 323                 return MathAtom(new MathMacro(buf, s));
 324
 325         latexkeys const * l = in_word_set(s);
 326         if (l) {
 327                 docstring const & inset = l->inset;
 328                 //lyxerr << " found inset: '" << inset << '\'' << endl;
 329                 if (inset == "ref")
 330                         return MathAtom(new InsetMathRef(buf, l->name));
 331                 if (inset == "overset")
 332                         return MathAtom(new InsetMathOverset(buf));
 333                 if (inset == "underset")
 334                         return MathAtom(new InsetMathUnderset(buf));
 335                 if (inset == "decoration")
 336                         return MathAtom(new InsetMathDecoration(buf, l));
 337                 if (inset == "space")
 338                         return MathAtom(new InsetMathSpace(to_ascii(l->name), ""));
 339                 if (inset == "dots")
 340                         return MathAtom(new InsetMathDots(l));
 341                 if (inset == "mbox")
 342                         // return MathAtom(new InsetMathMBox);
 343                         // InsetMathMBox is proposed to replace InsetMathBox,
 344                         // but is not ready yet (it needs a BufferView for
 345                         // construction)
 346                         return MathAtom(new InsetMathBox(buf, l->name));
 347 //              if (inset == "fbox")
 348 //                      return MathAtom(new InsetMathFBox(l));
 349                 if (inset == "style")
 350                         return MathAtom(new InsetMathSize(buf, l));
 351                 if (inset == "font")
 352                         return MathAtom(new InsetMathFont(buf, l));
 353                 if (inset == "oldfont")
 354                         return MathAtom(new InsetMathFontOld(buf, l));
 355                 if (inset == "matrix")
 356                         return MathAtom(new InsetMathAMSArray(buf, s));
 357                 if (inset == "split")
 358                         return MathAtom(new InsetMathSplit(buf, s));
 359                 if (inset == "big")
 360                         // we can't create a InsetMathBig, since the argument
 361                         // is missing.
 362                         return MathAtom(new InsetMathUnknown(s));
 363                 return MathAtom(new InsetMathSymbol(l));
 364         }
 365
 366         if (s.size() == 2 && s[0] == '#' && s[1] >= '1' && s[1] <= '9')
 367                 return MathAtom(new MathMacroArgument(s[1] - '0'));
 368         if (s.size() == 3 && s[0] == '\\' && s[1] == '#'
 369                         && s[2] >= '1' && s[2] <= '9')
 370                 return MathAtom(new MathMacroArgument(s[2] - '0'));
 371         if (s == "boxed")
 372                 return MathAtom(new InsetMathBoxed(buf));
 373         if (s == "fbox")
 374                 return MathAtom(new InsetMathFBox(buf));
 375         if (s == "framebox")
 376                 return MathAtom(new InsetMathMakebox(buf, true));
 377         if (s == "makebox")
 378                 return MathAtom(new InsetMathMakebox(buf, false));
 379         if (s == "kern")
 380                 return MathAtom(new InsetMathKern);
 381         if (s.substr(0, 8) == "xymatrix") {
 382                 char spacing_code = '\0';
 383                 Length spacing;
 384                 bool equal_spacing = false;
 385                 size_t const len = s.length();
 386                 size_t i = 8;
 387                 if (i < len && s[i] == '@') {
 388                         ++i;
 389                         if (i < len && s[i] == '!') {
 390                                 equal_spacing = true;
 391                                 ++i;
 392                                 if (i < len) {
 393                                         switch (s[i]) {
 394                                         case '0':
 395                                         case 'R':
 396                                         case 'C':
 397                                                 spacing_code = static_cast<char>(s[i]);
 398                                         }
 399                                 }
 400                         } else if (i < len) {
 401                                 switch (s[i]) {
 402                                 case 'R':
 403                                 case 'C':
 404                                 case 'M':
 405                                 case 'W':
 406                                 case 'H':
 407                                 case 'L':
 408                                         spacing_code = static_cast<char>(s[i]);
 409                                         ++i;
 410                                         break;
 411                                 }
 412                                 if (i < len && s[i] == '=') {
 413                                         ++i;
 414                                         spacing = Length(to_ascii(s.substr(i)));
 415                                 }
 416                         }
 417                 }
 418                 return MathAtom(new InsetMathXYMatrix(buf, spacing, spacing_code,
 419                         equal_spacing));
 420         }
 421
 422         if (s == "Diagram")
 423                 return MathAtom(new InsetMathDiagram(buf));
 424         if (s == "xrightarrow" || s == "xleftarrow")
 425                 return MathAtom(new InsetMathXArrow(buf, s));
 426         if (s == "split" || s == "alignedat")
 427                 return MathAtom(new InsetMathSplit(buf, s));
 428         if (s == "cases")
 429                 return MathAtom(new InsetMathCases(buf));
 430         if (s == "substack")
 431                 return MathAtom(new InsetMathSubstack(buf));
 432         if (s == "subarray" || s == "array")
 433                 return MathAtom(new InsetMathArray(buf, s, 1, 1));
 434         if (s == "sqrt")
 435                 return MathAtom(new InsetMathSqrt(buf));
 436         if (s == "root")
 437                 return MathAtom(new InsetMathRoot(buf));
 438         if (s == "tabular")
 439                 return MathAtom(new InsetMathTabular(buf, s, 1, 1));
 440         if (s == "stackrel")
 441                 return MathAtom(new InsetMathStackrel(buf));
 442         if (s == "binom")
 443                 return MathAtom(new InsetMathBinom(buf, InsetMathBinom::BINOM));
 444         if (s == "dbinom")
 445                 return MathAtom(new InsetMathBinom(buf, InsetMathBinom::DBINOM));
 446         if (s == "tbinom")
 447                 return MathAtom(new InsetMathBinom(buf, InsetMathBinom::TBINOM));
 448         if (s == "choose")
 449                 return MathAtom(new InsetMathBinom(buf, InsetMathBinom::CHOOSE));
 450         if (s == "brace")
 451                 return MathAtom(new InsetMathBinom(buf, InsetMathBinom::BRACE));
 452         if (s == "brack")
 453                 return MathAtom(new InsetMathBinom(buf, InsetMathBinom::BRACK));
 454         if (s == "frac")
 455                 return MathAtom(new InsetMathFrac(buf));
 456         if (s == "cfrac")
 457                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRAC));
 458         if (s == "dfrac")
 459                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::DFRAC));
 460         if (s == "tfrac")
 461                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::TFRAC));
 462         if (s == "over")
 463                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::OVER));
 464         if (s == "nicefrac")
 465                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::NICEFRAC));
 466         if (s == "unitfrac")
 467                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNITFRAC));
 468         // These string values are only for math toolbar use, no LaTeX names
 469         if (s == "unitfracthree")
 470                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNITFRAC, 3));
 471         if (s == "unitone")
 472                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNIT, 1));
 473         if (s == "unittwo")
 474                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::UNIT));
 475         if (s == "cfracleft")
 476                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRACLEFT));
 477         if (s == "cfracright")
 478                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::CFRACRIGHT));
 479         //if (s == "infer")
 480         //      return MathAtom(new MathInferInset);
 481         if (s == "atop")
 482                 return MathAtom(new InsetMathFrac(buf, InsetMathFrac::ATOP));
 483         if (s == "lefteqn")
 484                 return MathAtom(new InsetMathLefteqn(buf));
 485         if (s == "boldsymbol")
 486                 return MathAtom(new InsetMathBoldSymbol(buf, InsetMathBoldSymbol::AMS_BOLD));
 487         if (s == "bm")
 488                 return MathAtom(new InsetMathBoldSymbol(buf, InsetMathBoldSymbol::BM_BOLD));
 489         if (s == "heavysymbol" || s == "hm")
 490                 return MathAtom(new InsetMathBoldSymbol(buf, InsetMathBoldSymbol::BM_HEAVY));
 491         if (s == "color" || s == "normalcolor")
 492                 return MathAtom(new InsetMathColor(buf, true));
 493         if (s == "textcolor")
 494                 return MathAtom(new InsetMathColor(buf, false));
 495         if (s == "hphantom")
 496                 return MathAtom(new InsetMathPhantom(buf, InsetMathPhantom::hphantom));
 497         if (s == "phantom")
 498                 return MathAtom(new InsetMathPhantom(buf, InsetMathPhantom::phantom));
 499         if (s == "vphantom")
 500                 return MathAtom(new InsetMathPhantom(buf, InsetMathPhantom::vphantom));
 501         if (s == "ensuremath")
 502                 return MathAtom(new InsetMathEnsureMath(buf));
 503         if (isSpecialChar(s))
 504                 return MathAtom(new InsetMathSpecialChar(s));
 505
 506         if (s == "regexp")
 507                 return MathAtom(new InsetMathHull(buf, hullRegexp));
 508
 509         return MathAtom(new MathMacro(buf, s));
 510 }
 511
 512
 513 bool createInsetMath_fromDialogStr(docstring const & str, MathData & ar)
 514 {
 515         // An example str:
 516         // "ref LatexCommand ref\nreference \"sec:Title\"\n\\end_inset\n\n";
 517         docstring name;
 518         docstring body = split(str, name, ' ');
 519
 520         if (name == "ref") {
 521                 InsetCommandParams icp(REF_CODE);
 522                 // FIXME UNICODE
 523                 InsetCommand::string2params(to_utf8(str), icp);
 524                 Encoding const * const utf8 = encodings.fromLyXName("utf8");
 525                 OutputParams op(utf8);
 526                 mathed_parse_cell(ar, icp.getCommand(op));
 527         } else if (name == "mathspace") {
 528                 InsetSpaceParams isp(true);
 529                 InsetSpace::string2params(to_utf8(str), isp);
 530                 InsetSpace is(isp);
 531                 TexRow texrow;
 532                 odocstringstream ods;
 533                 otexstream os(ods, texrow);
 534                 Encoding const * const ascii = encodings.fromLyXName("ascii");
 535                 OutputParams op(ascii);
 536                 is.latex(os, op);
 537                 mathed_parse_cell(ar, ods.str());
 538                 if (ar.size() == 2) {
 539                         // remove "{}"
 540                         if (ar[1].nucleus()->asBraceInset())
 541                                 ar.pop_back();
 542                 }
 543         } else
 544                 return false;
 545
 546         if (ar.size() != 1)
 547                 return false;
 548
 549         return ar[0].nucleus();
 550 }
 551
 552
 553 bool isAsciiOrMathAlpha(char_type c)
 554 {
 555         return c < 0x80 || Encodings::isMathAlpha(c);
 556 }
 557
 558
 559 } // namespace lyx