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