src/mathed/MathSupport.cpp

   1 /**
   2  * \file MathSupport.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Alejandro Aguilar Sierra
   7  * \author André Pönitz
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "MathSupport.h"
  15
  16 #include "InsetMathFont.h"
  17 #include "InsetMathSymbol.h"
  18 #include "Length.h"
  19 #include "MathData.h"
  20 #include "MathFactory.h"
  21 #include "MathParser.h"
  22 #include "MathStream.h"
  23
  24 #include "LaTeXFeatures.h"
  25 #include "MetricsInfo.h"
  26
  27 #include "frontends/FontLoader.h"
  28 #include "frontends/FontMetrics.h"
  29 #include "frontends/Painter.h"
  30
  31 #include "support/debug.h"
  32 #include "support/docstream.h"
  33 #include "support/lassert.h"
  34 #include "support/lyxlib.h"
  35
  36 #include <map>
  37 #include <algorithm>
  38
  39 using namespace std;
  40
  41 namespace lyx {
  42
  43 using frontend::Painter;
  44
  45
  46 ///
  47 class Matrix {
  48 public:
  49         ///
  50         Matrix(int, double, double);
  51         ///
  52         void transform(double &, double &);
  53 private:
  54         ///
  55         double m_[2][2];
  56 };
  57
  58
  59 Matrix::Matrix(int code, double x, double y)
  60 {
  61         double const cs = (code & 1) ? 0 : (1 - code);
  62         double const sn = (code & 1) ? (2 - code) : 0;
  63         m_[0][0] =  cs * x;
  64         m_[0][1] =  sn * x;
  65         m_[1][0] = -sn * y;
  66         m_[1][1] =  cs * y;
  67 }
  68
  69
  70 void Matrix::transform(double & x, double & y)
  71 {
  72         double xx = m_[0][0] * x + m_[0][1] * y;
  73         double yy = m_[1][0] * x + m_[1][1] * y;
  74         x = xx;
  75         y = yy;
  76 }
  77
  78
  79
  80 namespace {
  81
  82 /*
  83  * Internal struct of a drawing: code n x1 y1 ... xn yn, where code is:
  84  * 0 = end, 1 = line, 2 = polyline, 3 = square line, 4 = square polyline
  85  * 5 = rounded thick line (i.e. dot for short line)
  86  */
  87
  88
  89 double const parenthHigh[] = {
  90         2, 13,
  91         0.9840, 0.0014, 0.7143, 0.0323, 0.4603, 0.0772,
  92         0.2540, 0.1278, 0.1746, 0.1966, 0.0952, 0.3300,
  93         0.0950, 0.5000, 0.0952, 0.6700, 0.1746, 0.8034,
  94         0.2540, 0.8722, 0.4603, 0.9228, 0.7143, 0.9677,
  95         0.9840, 0.9986,
  96         0
  97 };
  98
  99
 100 double const parenth[] = {
 101         2, 13,
 102         0.9930, 0.0071, 0.7324, 0.0578, 0.5141, 0.1126,
 103         0.3380, 0.1714, 0.2183, 0.2333, 0.0634, 0.3621,
 104         0.0141, 0.5000, 0.0563, 0.6369, 0.2113, 0.7647,
 105         0.3310, 0.8276, 0.5070, 0.8864, 0.7254, 0.9412,
 106         0.9930, 0.9919,
 107         0
 108 };
 109
 110
 111 double const brace[] = {
 112         2, 21,
 113         0.9492, 0.0020, 0.9379, 0.0020, 0.7458, 0.0243,
 114         0.5819, 0.0527, 0.4859, 0.0892, 0.4463, 0.1278,
 115         0.4463, 0.3732, 0.4011, 0.4199, 0.2712, 0.4615,
 116         0.0734, 0.4919, 0.0113, 0.5000, 0.0734, 0.5081,
 117         0.2712, 0.5385, 0.4011, 0.5801, 0.4463, 0.6268,
 118         0.4463, 0.8722, 0.4859, 0.9108, 0.5819, 0.9473,
 119         0.7458, 0.9757, 0.9379, 0.9980, 0.9492, 0.9980,
 120         0
 121 };
 122
 123
 124 double const mapsto[] = {
 125         2, 3,
 126         0.75, 0.015, 0.95, 0.5, 0.75, 0.985,
 127         1, 0.015, 0.475, 0.945, 0.475,
 128         1, 0.015, 0.015, 0.015, 0.985,
 129         0
 130 };
 131
 132
 133 double const lhook[] = {
 134         2, 3,
 135         0.25, 0.015, 0.05, 0.5, 0.25, 0.985,
 136         1, 0.015, 0.475, 0.7, 0.475,
 137         2, 5,
 138         0.7, 0.015, 0.825, 0.15, 0.985, 0.25,
 139         0.825, 0.35, 0.7, 0.475,
 140         0
 141 };
 142
 143
 144 double const rhook[] = {
 145         2, 3,
 146         0.75, 0.015, 0.95, 0.5, 0.75, 0.985,
 147         1, 0.3, 0.475, 0.985, 0.475,
 148         2, 5,
 149         0.3, 0.015, 0.175, 0.15, 0.05, 0.25,
 150         0.175, 0.35, 0.3, 0.475,
 151         0
 152 };
 153
 154
 155 double const LRArrow[] = {
 156         2, 3,
 157         0.25, 0.015, 0.05, 0.5, 0.25, 0.985,
 158         2, 3,
 159         0.75, 0.015, 0.95, 0.5, 0.75, 0.985,
 160         1, 0.2, 0.8, 0.8, 0.8,
 161         1, 0.2, 0.2, 0.8, 0.2,
 162         0
 163 };
 164
 165
 166 double const LArrow[] = {
 167         2, 3,
 168         0.25, 0.015, 0.05, 0.5, 0.25, 0.985,
 169         1, 0.2, 0.8, 0.985, 0.8,
 170         1, 0.2, 0.2, 0.985, 0.2,
 171         0
 172 };
 173
 174
 175 double const lharpoondown[] = {
 176         2, 2,
 177         0.015, 0.5, 0.25, 0.985,
 178         1, 0.02, 0.475, 0.985, 0.475,
 179         0
 180 };
 181
 182
 183 double const lharpoonup[] = {
 184         2, 2,
 185         0.25, 0.015, 0.015, 0.5,
 186         1, 0.02, 0.525, 0.985, 0.525,
 187         0
 188 };
 189
 190
 191 double const lrharpoons[] = {
 192         2, 2,
 193         0.25, 0.015, 0.015, 0.225,
 194         1, 0.02, 0.23, 0.985, 0.23,
 195         2, 2,
 196         0.75, 0.985, 0.985, 0.775,
 197         1, 0.02, 0.7, 0.980, 0.7,
 198         0
 199 };
 200
 201
 202 double const rlharpoons[] = {
 203         2, 2,
 204         0.75, 0.015, 0.985, 0.225,
 205         1, 0.02, 0.23, 0.985, 0.23,
 206         2, 2,
 207         0.25, 0.985, 0.015, 0.775,
 208         1, 0.02, 0.7, 0.980, 0.7,
 209         0
 210 };
 211
 212
 213 double const arrow[] = {
 214         4, 7,
 215         0.0150, 0.7500, 0.2000, 0.6000, 0.3500, 0.3500,
 216         0.5000, 0.0500, 0.6500, 0.3500, 0.8000, 0.6000,
 217         0.9500, 0.7500,
 218         3, 0.5000, 0.1500, 0.5000, 0.9500,
 219         0
 220 };
 221
 222
 223 double const Arrow[] = {
 224         4, 7,
 225         0.0150, 0.7500, 0.2000, 0.6000, 0.3500, 0.3500,
 226         0.5000, 0.0500, 0.6500, 0.3500, 0.8000, 0.6000,
 227         0.9500, 0.7500,
 228         3, 0.3500, 0.5000, 0.3500, 0.9500,
 229         3, 0.6500, 0.5000, 0.6500, 0.9500,
 230         0
 231 };
 232
 233
 234 double const udarrow[] = {
 235         2, 3,
 236         0.015, 0.25,  0.5, 0.05, 0.95, 0.25,
 237         2, 3,
 238         0.015, 0.75,  0.5, 0.95, 0.95, 0.75,
 239         1, 0.5, 0.1,  0.5, 0.9,
 240         0
 241 };
 242
 243
 244 double const Udarrow[] = {
 245         2, 3,
 246         0.015, 0.25,  0.5, 0.05, 0.95, 0.25,
 247         2, 3,
 248         0.015, 0.75,  0.5, 0.95, 0.95, 0.75,
 249         1, 0.35, 0.2, 0.35, 0.8,
 250         1, 0.65, 0.2, 0.65, 0.8,
 251         0
 252 };
 253
 254
 255 double const brack[] = {
 256         2, 4,
 257         0.95, 0.05,  0.05, 0.05,  0.05, 0.95,  0.95, 0.95,
 258         0
 259 };
 260
 261
 262 double const dbrack[] = {
 263         2, 4,
 264         0.95, 0.05,  0.05, 0.05,  0.05, 0.95,  0.95, 0.95,
 265         2, 2,
 266         0.50, 0.05,  0.50, 0.95,
 267         0
 268 };
 269
 270
 271 double const corner[] = {
 272         2, 3,
 273         0.95, 0.05,  0.05, 0.05,  0.05, 0.95,
 274         0
 275 };
 276
 277
 278 double const angle[] = {
 279         2, 3,
 280         1, 0,  0.05, 0.5,  1, 1,
 281         0
 282 };
 283
 284
 285 double const slash[] = {
 286         1, 0.95, 0.05, 0.05, 0.95,
 287         0
 288 };
 289
 290
 291 double const hline[] = {
 292         1, 0.00, 0.5, 1.0, 0.5,
 293         0
 294 };
 295
 296
 297 double const dot[] = {
 298 //      1, 0.5, 0.2, 0.5, 0.2,
 299 //      1, 0.4, 0.4, 0.6, 0.4,
 300 //      1, 0.5, 0.5, 0.5, 0.5,
 301         5, 0.4, 0.4, 0.6, 0.4,
 302         0
 303 };
 304
 305
 306 double const ddot[] = {
 307         5, 0.0, 0.4, 0.3, 0.4,
 308         5, 0.6, 0.4, 1.0, 0.4,
 309         0
 310 };
 311
 312
 313 double const dddot[] = {
 314         1, 0.1,  0.5, 0.2,  0.5,
 315         1, 0.45, 0.5, 0.55, 0.5,
 316         1, 0.8,  0.5, 0.9,  0.5,
 317         0
 318 };
 319
 320
 321 double const ddddot[] = {
 322         1, 0.1,  0.5, 0.2,  0.5,
 323         1, 0.45, 0.5, 0.55, 0.5,
 324         1, 0.8,  0.5, 0.9,  0.5,
 325         1, 1.15, 0.5, 1.25, 0.5,
 326         0
 327 };
 328
 329
 330 double const hline3[] = {
 331         1, 0.1,   0,  0.15,  0,
 332         1, 0.475, 0,  0.525, 0,
 333         1, 0.85,  0,  0.9,   0,
 334         0
 335 };
 336
 337
 338 double const dline3[] = {
 339         1, 0.1,   0.1,   0.15,  0.15,
 340         1, 0.475, 0.475, 0.525, 0.525,
 341         1, 0.85,  0.85,  0.9,   0.9,
 342         0
 343 };
 344
 345
 346 double const ring[] = {
 347         2, 5,
 348         0.5, 0.8,  0.8, 0.5,  0.5, 0.2,  0.2, 0.5,  0.5, 0.8,
 349         0
 350 };
 351
 352
 353 double const vert[] = {
 354         1, 0.5, 0.05,  0.5, 0.95,
 355         0
 356 };
 357
 358
 359 double const  Vert[] = {
 360         1, 0.3, 0.05,  0.3, 0.95,
 361         1, 0.7, 0.05,  0.7, 0.95,
 362         0
 363 };
 364
 365
 366 double const tilde[] = {
 367         2, 4,
 368         0.00, 0.8,  0.25, 0.2,  0.75, 0.8,  1.00, 0.2,
 369         0
 370 };
 371
 372
 373 struct deco_struct {
 374         double const * data;
 375         int angle;
 376 };
 377
 378 struct named_deco_struct {
 379         char const * name;
 380         double const * data;
 381         int angle;
 382 };
 383
 384 named_deco_struct deco_table[] = {
 385         // Decorations
 386         {"widehat",             angle,        3 },
 387         {"widetilde",           tilde,        0 },
 388         {"underbar",            hline,        0 },
 389         {"underline",           hline,        0 },
 390         {"overline",            hline,        0 },
 391         {"underbrace",          brace,        1 },
 392         {"overbrace",           brace,        3 },
 393         {"overleftarrow",       arrow,        1 },
 394         {"overrightarrow",      arrow,        3 },
 395         {"overleftrightarrow",  udarrow,      1 },
 396         {"xhookleftarrow",      lhook,        0 },
 397         {"xhookrightarrow",     rhook,        0 },
 398         {"xleftarrow",          arrow,        1 },
 399         {"xLeftarrow",          LArrow,       0 },
 400         {"xleftharpoondown",    lharpoondown, 0 },
 401         {"xleftharpoonup",      lharpoonup,   0 },
 402         {"xleftrightharpoons",  lrharpoons,   0 },
 403         {"xleftrightarrow",     udarrow,      1 },
 404         {"xLeftrightarrow",     LRArrow,      0 },
 405         {"xmapsto",             mapsto,       0 },
 406         {"xrightarrow",         arrow,        3 },
 407         {"xRightarrow",         LArrow,       2 },
 408         {"xrightharpoondown",   lharpoonup,   2 },
 409         {"xrightharpoonup",     lharpoondown, 2 },
 410         {"xrightleftharpoons",  rlharpoons,   0 },
 411         {"underleftarrow",      arrow,        1 },
 412         {"underrightarrow",     arrow,        3 },
 413         {"underleftrightarrow", udarrow,      1 },
 414         {"undertilde",          tilde,        0 },
 415         {"utilde",              tilde,        0 },
 416
 417         // Delimiters
 418         {"(",              parenth,    0 },
 419         {")",              parenth,    2 },
 420         {"{",              brace,      0 },
 421         {"}",              brace,      2 },
 422         {"lbrace",         brace,      0 },
 423         {"rbrace",         brace,      2 },
 424         {"[",              brack,      0 },
 425         {"]",              brack,      2 },
 426         {"llbracket",      dbrack,     0 },
 427         {"rrbracket",      dbrack,     2 },
 428         {"|",              vert,       0 },
 429         {"/",              slash,      0 },
 430         {"slash",          slash,      0 },
 431         {"vert",           vert,       0 },
 432         {"lvert",          vert,       0 },
 433         {"rvert",          vert,       0 },
 434         {"Vert",           Vert,       0 },
 435         {"lVert",          Vert,       0 },
 436         {"rVert",          Vert,       0 },
 437         {"'",              slash,      1 },
 438         {"<",              angle,      0 },
 439         {">",              angle,      2 },
 440         {"\\",             slash,      1 },
 441         {"backslash",      slash,      1 },
 442         {"langle",         angle,      0 },
 443         {"lceil",          corner,     0 },
 444         {"lfloor",         corner,     1 },
 445         {"rangle",         angle,      2 },
 446         {"rceil",          corner,     3 },
 447         {"rfloor",         corner,     2 },
 448         {"downarrow",      arrow,      2 },
 449         {"Downarrow",      Arrow,      2 },
 450         {"uparrow",        arrow,      0 },
 451         {"Uparrow",        Arrow,      0 },
 452         {"updownarrow",    udarrow,    0 },
 453         {"Updownarrow",    Udarrow,    0 },
 454
 455         // Accents
 456         {"ddot",           ddot,       0 },
 457         {"dddot",          dddot,      0 },
 458         {"ddddot",         ddddot,     0 },
 459         {"hat",            angle,      3 },
 460         {"grave",          slash,      1 },
 461         {"acute",          slash,      0 },
 462         {"tilde",          tilde,      0 },
 463         {"bar",            hline,      0 },
 464         {"dot",            dot,        0 },
 465         {"check",          angle,      1 },
 466         {"breve",          parenth,    1 },
 467         {"vec",            arrow,      3 },
 468         {"mathring",       ring,       0 },
 469
 470         // Dots
 471         {"dots",           hline3,     0 },
 472         {"ldots",          hline3,     0 },
 473         {"cdots",          hline3,     0 },
 474         {"vdots",          hline3,     1 },
 475         {"ddots",          dline3,     0 },
 476         {"adots",          dline3,     1 },
 477         {"iddots",         dline3,     1 },
 478         {"dotsb",          hline3,     0 },
 479         {"dotsc",          hline3,     0 },
 480         {"dotsi",          hline3,     0 },
 481         {"dotsm",          hline3,     0 },
 482         {"dotso",          hline3,     0 }
 483 };
 484
 485
 486 map<docstring, deco_struct> deco_list;
 487
 488 // sort the table on startup
 489 class init_deco_table {
 490 public:
 491         init_deco_table() {
 492                 unsigned const n = sizeof(deco_table) / sizeof(deco_table[0]);
 493                 for (named_deco_struct * p = deco_table; p != deco_table + n; ++p) {
 494                         deco_struct d;
 495                         d.data  = p->data;
 496                         d.angle = p->angle;
 497                         deco_list[from_ascii(p->name)] = d;
 498                 }
 499         }
 500 };
 501
 502 static init_deco_table dummy_deco_table;
 503
 504
 505 deco_struct const * search_deco(docstring const & name)
 506 {
 507         map<docstring, deco_struct>::const_iterator p = deco_list.find(name);
 508         return p == deco_list.end() ? 0 : &(p->second);
 509 }
 510
 511
 512 } // namespace
 513
 514
 515 int mathed_font_em(FontInfo const & font)
 516 {
 517         return theFontMetrics(font).em();
 518 }
 519
 520
 521 int mathed_font_x_height(FontInfo const & font)
 522 {
 523         return theFontMetrics(font).xHeight();
 524 }
 525
 526 /* The math units. Quoting TeX by Topic, p.205:
 527  *
 528  * Spacing around mathematical objects is measured in mu units. A mu
 529  * is 1/18th part of \fontdimen6 of the font in family 2 in the
 530  * current style, the ‘quad’ value of the symbol font.
 531  *
 532  * A \thickmuskip (default value in plain TeX: 5mu plus 5mu) is
 533  * inserted around (binary) relations, except where these are preceded
 534  * or followed by other relations or punctuation, and except if they
 535  * follow an open, or precede a close symbol.
 536  *
 537  * A \medmuskip (default value in plain TeX: 4mu plus 2mu minus 4mu)
 538  * is put around binary operators.
 539  *
 540  * A \thinmuskip (default value in plain TeX: 3mu) follows after
 541  * punctuation, and is put around inner objects, except where these
 542  * are followed by a close or preceded by an open symbol, and except
 543  * if the other object is a large operator or a binary relation.
 544  *
 545  * See the file MathClass.cpp for a formal implementation of the rules
 546  * above.
 547  */
 548
 549 int mathed_mu(FontInfo const & font, double mu)
 550 {
 551         MetricsBase mb(nullptr, font);
 552         return mb.inPixels(Length(mu, Length::MU));
 553 }
 554
 555 int mathed_thinmuskip(FontInfo const & font) { return mathed_mu(font, 3.0); }
 556 int mathed_medmuskip(FontInfo const & font) { return mathed_mu(font, 4.0); }
 557 int mathed_thickmuskip(FontInfo const & font) { return mathed_mu(font, 5.0); }
 558
 559
 560 int mathed_char_width(FontInfo const & font, char_type c)
 561 {
 562         return theFontMetrics(font).width(c);
 563 }
 564
 565
 566 int mathed_char_kerning(FontInfo const & font, char_type c)
 567 {
 568         frontend::FontMetrics const & fm = theFontMetrics(font);
 569         return max(0, fm.rbearing(c) - fm.width(c));
 570 }
 571
 572
 573 void mathed_string_dim(FontInfo const & font,
 574                        docstring const & s,
 575                        Dimension & dim)
 576 {
 577         frontend::FontMetrics const & fm = theFontMetrics(font);
 578         dim.asc = 0;
 579         dim.des = 0;
 580         for (docstring::const_iterator it = s.begin();
 581              it != s.end();
 582              ++it) {
 583                 dim.asc = max(dim.asc, fm.ascent(*it));
 584                 dim.des = max(dim.des, fm.descent(*it));
 585         }
 586         dim.wid = fm.width(s);
 587 }
 588
 589
 590 int mathed_string_width(FontInfo const & font, docstring const & s)
 591 {
 592         return theFontMetrics(font).width(s);
 593 }
 594
 595
 596 void mathed_draw_deco(PainterInfo & pi, int x, int y, int w, int h,
 597         docstring const & name)
 598 {
 599         if (name == ".") {
 600                 pi.pain.line(x + w/2, y, x + w/2, y + h,
 601                           Color_cursor, Painter::line_onoffdash);
 602                 return;
 603         }
 604
 605         deco_struct const * mds = search_deco(name);
 606         if (!mds) {
 607                 lyxerr << "Deco was not found. Programming error?" << endl;
 608                 lyxerr << "name: '" << to_utf8(name) << "'" << endl;
 609                 return;
 610         }
 611
 612         int const n = (w < h) ? w : h;
 613         int const r = mds->angle;
 614         double const * d = mds->data;
 615
 616         if (h > 70 && (name == "(" || name == ")"))
 617                 d = parenthHigh;
 618
 619         Matrix mt(r, w, h);
 620         Matrix sqmt(r, n, n);
 621
 622         if (r > 0 && r < 3)
 623                 y += h;
 624
 625         if (r >= 2)
 626                 x += w;
 627
 628         for (int i = 0; d[i]; ) {
 629                 int code = int(d[i++]);
 630                 if (code & 1) {  // code == 1 || code == 3 || code == 5
 631                         double xx = d[i++];
 632                         double yy = d[i++];
 633                         double x2 = d[i++];
 634                         double y2 = d[i++];
 635                         if (code == 3)
 636                                 sqmt.transform(xx, yy);
 637                         else
 638                                 mt.transform(xx, yy);
 639                         mt.transform(x2, y2);
 640                         pi.pain.line(
 641                                 int(x + xx + 0.5), int(y + yy + 0.5),
 642                                 int(x + x2 + 0.5), int(y + y2 + 0.5),
 643                                 pi.base.font.color());
 644                         if (code == 5) {  // thicker, but rounded
 645                                 pi.pain.line(
 646                                         int(x + xx + 0.5+1), int(y + yy + 0.5-1),
 647                                         int(x + x2 + 0.5-1), int(y + y2 + 0.5-1),
 648                                 pi.base.font.color());
 649                                 pi.pain.line(
 650                                         int(x + xx + 0.5+1), int(y + yy + 0.5+1),
 651                                         int(x + x2 + 0.5-1), int(y + y2 + 0.5+1),
 652                                 pi.base.font.color());
 653                         }
 654                 } else {
 655                         int xp[32];
 656                         int yp[32];
 657                         int const n2 = int(d[i++]);
 658                         for (int j = 0; j < n2; ++j) {
 659                                 double xx = d[i++];
 660                                 double yy = d[i++];
 661 //           lyxerr << ' ' << xx << ' ' << yy << ' ';
 662                                 if (code == 4)
 663                                         sqmt.transform(xx, yy);
 664                                 else
 665                                         mt.transform(xx, yy);
 666                                 xp[j] = int(x + xx + 0.5);
 667                                 yp[j] = int(y + yy + 0.5);
 668                                 //  lyxerr << "P[" << j ' ' << xx << ' ' << yy << ' ' << x << ' ' << y << ']';
 669                         }
 670                         pi.pain.lines(xp, yp, n2, pi.base.font.color());
 671                 }
 672         }
 673 }
 674
 675
 676 void mathedSymbolDim(MetricsBase & mb, Dimension & dim, latexkeys const * sym)
 677 {
 678         LASSERT((bool)sym, return);
 679         //lyxerr << "metrics: symbol: '" << sym->name
 680         //      << "' in font: '" << sym->inset
 681         //      << "' drawn as: '" << sym->draw
 682         //      << "'" << endl;
 683
 684         bool const italic_upcase_greek = sym->inset == "cmr" &&
 685                 sym->extra == "mathalpha" &&
 686                 mb.fontname == "mathit";
 687         std::string const font = italic_upcase_greek ? "cmm" : sym->inset;
 688         Changer dummy = mb.changeFontSet(font);
 689         mathed_string_dim(mb.font, sym->draw, dim);
 690 }
 691
 692
 693 void mathedSymbolDraw(PainterInfo & pi, int x, int y, latexkeys const * sym)
 694 {
 695         LASSERT((bool)sym, return);
 696         //lyxerr << "drawing: symbol: '" << sym->name
 697         //      << "' in font: '" << sym->inset
 698         //      << "' drawn as: '" << sym->draw
 699         //      << "'" << endl;
 700
 701         bool const italic_upcase_greek = sym->inset == "cmr" &&
 702                 sym->extra == "mathalpha" &&
 703                 pi.base.fontname == "mathit";
 704         std::string const font = italic_upcase_greek ? "cmm" : sym->inset;
 705
 706         Changer dummy = pi.base.changeFontSet(font);
 707         pi.draw(x, y, sym->draw);
 708 }
 709
 710
 711 void metricsStrRedBlack(MetricsInfo & mi, Dimension & dim, docstring const & str)
 712 {
 713         FontInfo font = mi.base.font;
 714         augmentFont(font, "mathnormal");
 715         mathed_string_dim(font, str, dim);
 716 }
 717
 718
 719 void drawStrRed(PainterInfo & pi, int x, int y, docstring const & str)
 720 {
 721         FontInfo f = pi.base.font;
 722         augmentFont(f, "mathnormal");
 723         f.setColor(Color_latex);
 724         pi.pain.text(x, y, str, f);
 725 }
 726
 727
 728 void drawStrBlack(PainterInfo & pi, int x, int y, docstring const & str)
 729 {
 730         FontInfo f = pi.base.font;
 731         augmentFont(f, "mathnormal");
 732         f.setColor(Color_foreground);
 733         pi.pain.text(x, y, str, f);
 734 }
 735
 736
 737 void math_font_max_dim(FontInfo const & font, int & asc, int & des)
 738 {
 739         frontend::FontMetrics const & fm = theFontMetrics(font);
 740         asc = fm.maxAscent();
 741         des = fm.maxDescent();
 742 }
 743
 744
 745 struct fontinfo {
 746         string cmd_;
 747         FontFamily family_;
 748         FontSeries series_;
 749         FontShape  shape_;
 750         ColorCode        color_;
 751 };
 752
 753
 754 FontFamily const inh_family = INHERIT_FAMILY;
 755 FontSeries const inh_series = INHERIT_SERIES;
 756 FontShape  const inh_shape  = INHERIT_SHAPE;
 757
 758
 759 // mathnormal should be the first, otherwise the fallback further down
 760 // does not work
 761 fontinfo fontinfos[] = {
 762         // math fonts
 763         // Color_math determines which fonts are math (see isMathFont)
 764         {"mathnormal",    ROMAN_FAMILY, MEDIUM_SERIES,
 765                           ITALIC_SHAPE, Color_math},
 766         {"mathbf",        inh_family, BOLD_SERIES,
 767                           inh_shape, Color_math},
 768         {"mathcal",       CMSY_FAMILY, inh_series,
 769                           inh_shape, Color_math},
 770         {"mathfrak",      EUFRAK_FAMILY, inh_series,
 771                           inh_shape, Color_math},
 772         {"mathrm",        ROMAN_FAMILY, inh_series,
 773                           UP_SHAPE, Color_math},
 774         {"mathsf",        SANS_FAMILY, inh_series,
 775                           inh_shape, Color_math},
 776         {"mathbb",        MSB_FAMILY, inh_series,
 777                           inh_shape, Color_math},
 778         {"mathtt",        TYPEWRITER_FAMILY, inh_series,
 779                           inh_shape, Color_math},
 780         {"mathit",        inh_family, inh_series,
 781                           ITALIC_SHAPE, Color_math},
 782         {"mathscr",       RSFS_FAMILY, inh_series,
 783                           inh_shape, Color_math},
 784         {"cmex",          CMEX_FAMILY, inh_series,
 785                           inh_shape, Color_math},
 786         {"cmm",           CMM_FAMILY, inh_series,
 787                           inh_shape, Color_math},
 788         {"cmr",           CMR_FAMILY, inh_series,
 789                           inh_shape, Color_math},
 790         {"cmsy",          CMSY_FAMILY, inh_series,
 791                           inh_shape, Color_math},
 792         {"eufrak",        EUFRAK_FAMILY, inh_series,
 793                           inh_shape, Color_math},
 794         {"msa",           MSA_FAMILY, inh_series,
 795                           inh_shape, Color_math},
 796         {"msb",           MSB_FAMILY, inh_series,
 797                           inh_shape, Color_math},
 798         {"stmry",         STMARY_FAMILY, inh_series,
 799                           inh_shape, Color_math},
 800         {"wasy",          WASY_FAMILY, inh_series,
 801                           inh_shape, Color_math},
 802         {"esint",         ESINT_FAMILY, inh_series,
 803                           inh_shape, Color_math},
 804
 805         // Text fonts
 806         {"text",          inh_family, inh_series,
 807                           inh_shape, Color_foreground},
 808         {"textbf",        inh_family, BOLD_SERIES,
 809                           inh_shape, Color_foreground},
 810         {"textit",        inh_family, inh_series,
 811                           ITALIC_SHAPE, Color_foreground},
 812         {"textmd",        inh_family, MEDIUM_SERIES,
 813                           inh_shape, Color_foreground},
 814         {"textnormal",    inh_family, inh_series,
 815                           UP_SHAPE, Color_foreground},
 816         {"textrm",        ROMAN_FAMILY,
 817                           inh_series, UP_SHAPE,Color_foreground},
 818         {"textsc",        inh_family, inh_series,
 819                           SMALLCAPS_SHAPE, Color_foreground},
 820         {"textsf",        SANS_FAMILY, inh_series,
 821                           inh_shape, Color_foreground},
 822         {"textsl",        inh_family, inh_series,
 823                           SLANTED_SHAPE, Color_foreground},
 824         {"texttt",        TYPEWRITER_FAMILY, inh_series,
 825                           inh_shape, Color_foreground},
 826         {"textup",        inh_family, inh_series,
 827                           UP_SHAPE, Color_foreground},
 828
 829         // TIPA support
 830         {"textipa",       inh_family, inh_series,
 831                           inh_shape, Color_foreground},
 832
 833         // mhchem support
 834         {"ce",            inh_family, inh_series,
 835                           inh_shape, Color_foreground},
 836         {"cf",            inh_family, inh_series,
 837                           inh_shape, Color_foreground},
 838
 839         // LyX internal usage
 840         {"lyxtex",        inh_family, inh_series,
 841                           UP_SHAPE, Color_latex},
 842         // FIXME: The following two don't work on OS X, since the Symbol font
 843         //        uses a different encoding, and is therefore disabled in
 844         //        FontLoader::available().
 845         {"lyxsymbol",     SYMBOL_FAMILY, inh_series,
 846                           inh_shape, Color_math},
 847         {"lyxboldsymbol", SYMBOL_FAMILY, BOLD_SERIES,
 848                           inh_shape, Color_math},
 849         {"lyxblacktext",  ROMAN_FAMILY, MEDIUM_SERIES,
 850                           UP_SHAPE, Color_foreground},
 851         {"lyxnochange",   inh_family, inh_series,
 852                           inh_shape, Color_foreground},
 853         {"lyxfakebb",     TYPEWRITER_FAMILY, BOLD_SERIES,
 854                           UP_SHAPE, Color_math},
 855         {"lyxfakecal",    SANS_FAMILY, MEDIUM_SERIES,
 856                           ITALIC_SHAPE, Color_math},
 857         {"lyxfakefrak",   ROMAN_FAMILY, BOLD_SERIES,
 858                           ITALIC_SHAPE, Color_math}
 859 };
 860
 861
 862 fontinfo * lookupFont(string const & name)
 863 {
 864         //lyxerr << "searching font '" << name << "'" << endl;
 865         int const n = sizeof(fontinfos) / sizeof(fontinfo);
 866         for (int i = 0; i < n; ++i)
 867                 if (fontinfos[i].cmd_ == name) {
 868                         //lyxerr << "found '" << i << "'" << endl;
 869                         return fontinfos + i;
 870                 }
 871         return 0;
 872 }
 873
 874
 875 fontinfo * searchFont(string const & name)
 876 {
 877         fontinfo * f = lookupFont(name);
 878         return f ? f : fontinfos;
 879         // this should be mathnormal
 880         //return searchFont("mathnormal");
 881 }
 882
 883
 884 bool isFontName(string const & name)
 885 {
 886         return lookupFont(name);
 887 }
 888
 889
 890 bool isMathFont(string const & name)
 891 {
 892         fontinfo * f = lookupFont(name);
 893         return f && f->color_ == Color_math;
 894 }
 895
 896
 897 bool isTextFont(string const & name)
 898 {
 899         fontinfo * f = lookupFont(name);
 900         return f && f->color_ == Color_foreground;
 901 }
 902
 903
 904 FontInfo getFont(string const & name)
 905 {
 906         FontInfo font;
 907         augmentFont(font, name);
 908         return font;
 909 }
 910
 911
 912 void fakeFont(string const & orig, string const & fake)
 913 {
 914         fontinfo * forig = searchFont(orig);
 915         fontinfo * ffake = searchFont(fake);
 916         if (forig && ffake) {
 917                 forig->family_ = ffake->family_;
 918                 forig->series_ = ffake->series_;
 919                 forig->shape_  = ffake->shape_;
 920                 forig->color_  = ffake->color_;
 921         } else {
 922                 lyxerr << "Can't fake font '" << orig << "' with '"
 923                        << fake << "'" << endl;
 924         }
 925 }
 926
 927
 928 void augmentFont(FontInfo & font, string const & name)
 929 {
 930         static bool initialized = false;
 931         if (!initialized) {
 932                 initialized = true;
 933                 // fake fonts if necessary
 934                 if (!theFontLoader().available(getFont("mathfrak")))
 935                         fakeFont("mathfrak", "lyxfakefrak");
 936                 if (!theFontLoader().available(getFont("mathcal")))
 937                         fakeFont("mathcal", "lyxfakecal");
 938         }
 939         fontinfo * info = searchFont(name);
 940         if (info->family_ != inh_family)
 941                 font.setFamily(info->family_);
 942         if (info->series_ != inh_series)
 943                 font.setSeries(info->series_);
 944         if (info->shape_ != inh_shape)
 945                 font.setShape(info->shape_);
 946         if (info->color_ != Color_none)
 947                 font.setColor(info->color_);
 948 }
 949
 950
 951 bool isAlphaSymbol(MathAtom const & at)
 952 {
 953         if (at->asCharInset() ||
 954             (at->asSymbolInset() &&
 955              at->asSymbolInset()->isOrdAlpha()))
 956                 return true;
 957
 958         if (at->asFontInset()) {
 959                 MathData const & ar = at->asFontInset()->cell(0);
 960                 for (size_t i = 0; i < ar.size(); ++i) {
 961                         if (!(ar[i]->asCharInset() ||
 962                               (ar[i]->asSymbolInset() &&
 963                                ar[i]->asSymbolInset()->isOrdAlpha())))
 964                                 return false;
 965                 }
 966                 return true;
 967         }
 968         return false;
 969 }
 970
 971
 972 docstring asString(MathData const & ar)
 973 {
 974         odocstringstream os;
 975         otexrowstream ots(os);
 976         WriteStream ws(ots);
 977         ws << ar;
 978         return os.str();
 979 }
 980
 981
 982 void asArray(docstring const & str, MathData & ar, Parse::flags pf)
 983 {
 984         // If the QUIET flag is set, we are going to parse for either
 985         // a paste operation or a macro definition. We try to do the
 986         // right thing in all cases.
 987
 988         bool quiet = pf & Parse::QUIET;
 989         bool macro = pf & Parse::MACRODEF;
 990         if ((str.size() == 1 && quiet) || (!mathed_parse_cell(ar, str, pf) && quiet && !macro))
 991                 mathed_parse_cell(ar, str, pf | Parse::VERBATIM);
 992 }
 993
 994
 995 docstring asString(InsetMath const & inset)
 996 {
 997         odocstringstream os;
 998         otexrowstream ots(os);
 999         WriteStream ws(ots);
1000         inset.write(ws);
1001         return os.str();
1002 }
1003
1004
1005 docstring asString(MathAtom const & at)
1006 {
1007         odocstringstream os;
1008         otexrowstream ots(os);
1009         WriteStream ws(ots);
1010         at->write(ws);
1011         return os.str();
1012 }
1013
1014
1015 int axis_height(MetricsBase & mb)
1016 {
1017         Changer dummy = mb.changeFontSet("mathnormal");
1018         return theFontMetrics(mb.font).ascent('-') - 1;
1019 }
1020
1021
1022 void validate_math_word(LaTeXFeatures & features, docstring const & word)
1023 {
1024         MathWordList const & words = mathedWordList();
1025         MathWordList::const_iterator it = words.find(word);
1026         if (it != words.end()) {
1027                 string const req = it->second.requires;
1028                 if (!req.empty())
1029                         features.require(req);
1030         }
1031 }
1032
1033
1034 } // namespace lyx