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 docstring const &  mathedSymbol(MetricsBase & mb, latexkeys const * sym)
 677 {
 678         return (mb.font.style() == DISPLAY_STYLE && !sym->dsp_draw.empty()) ?
 679                 sym->dsp_draw : sym->draw;
 680 }
 681
 682
 683 void mathedSymbolDim(MetricsBase & mb, Dimension & dim, latexkeys const * sym)
 684 {
 685         LASSERT((bool)sym, return);
 686         //lyxerr << "metrics: symbol: '" << sym->name
 687         //      << "' in font: '" << sym->inset
 688         //      << "' drawn as: '" << sym->draw
 689         //      << "'" << endl;
 690
 691         bool const italic_upcase_greek = sym->inset == "cmr" &&
 692                 sym->extra == "mathalpha" &&
 693                 mb.fontname == "mathit";
 694         std::string const font = italic_upcase_greek ? "cmm" : sym->inset;
 695         Changer dummy = mb.changeFontSet(font);
 696         mathed_string_dim(mb.font, mathedSymbol(mb, sym), dim);
 697 }
 698
 699
 700 void mathedSymbolDraw(PainterInfo & pi, int x, int y, latexkeys const * sym)
 701 {
 702         LASSERT((bool)sym, return);
 703         //lyxerr << "drawing: symbol: '" << sym->name
 704         //      << "' in font: '" << sym->inset
 705         //      << "' drawn as: '" << sym->draw
 706         //      << "'" << endl;
 707
 708         bool const italic_upcase_greek = sym->inset == "cmr" &&
 709                 sym->extra == "mathalpha" &&
 710                 pi.base.fontname == "mathit";
 711         std::string const font = italic_upcase_greek ? "cmm" : sym->inset;
 712
 713         Changer dummy = pi.base.changeFontSet(font);
 714         pi.draw(x, y, mathedSymbol(pi.base, sym));
 715 }
 716
 717
 718 void metricsStrRedBlack(MetricsInfo & mi, Dimension & dim, docstring const & str)
 719 {
 720         FontInfo font = mi.base.font;
 721         augmentFont(font, "mathnormal");
 722         mathed_string_dim(font, str, dim);
 723 }
 724
 725
 726 void drawStrRed(PainterInfo & pi, int x, int y, docstring const & str)
 727 {
 728         FontInfo f = pi.base.font;
 729         augmentFont(f, "mathnormal");
 730         f.setColor(Color_latex);
 731         pi.pain.text(x, y, str, f);
 732 }
 733
 734
 735 void drawStrBlack(PainterInfo & pi, int x, int y, docstring const & str)
 736 {
 737         FontInfo f = pi.base.font;
 738         augmentFont(f, "mathnormal");
 739         f.setColor(Color_foreground);
 740         pi.pain.text(x, y, str, f);
 741 }
 742
 743
 744 void math_font_max_dim(FontInfo const & font, int & asc, int & des)
 745 {
 746         frontend::FontMetrics const & fm = theFontMetrics(font);
 747         asc = fm.maxAscent();
 748         des = fm.maxDescent();
 749 }
 750
 751
 752 struct fontinfo {
 753         string cmd_;
 754         FontFamily family_;
 755         FontSeries series_;
 756         FontShape  shape_;
 757         ColorCode        color_;
 758 };
 759
 760
 761 FontFamily const inh_family = INHERIT_FAMILY;
 762 FontSeries const inh_series = INHERIT_SERIES;
 763 FontShape  const inh_shape  = INHERIT_SHAPE;
 764
 765
 766 // mathnormal should be the first, otherwise the fallback further down
 767 // does not work
 768 fontinfo fontinfos[] = {
 769         // math fonts
 770         // Color_math determines which fonts are math (see isMathFont)
 771         {"mathnormal",    ROMAN_FAMILY, MEDIUM_SERIES,
 772                           ITALIC_SHAPE, Color_math},
 773         {"mathbf",        inh_family, BOLD_SERIES,
 774                           inh_shape, Color_math},
 775         {"mathcal",       CMSY_FAMILY, inh_series,
 776                           inh_shape, Color_math},
 777         {"mathfrak",      EUFRAK_FAMILY, inh_series,
 778                           inh_shape, Color_math},
 779         {"mathrm",        ROMAN_FAMILY, inh_series,
 780                           UP_SHAPE, Color_math},
 781         {"mathsf",        SANS_FAMILY, inh_series,
 782                           inh_shape, Color_math},
 783         {"mathbb",        MSB_FAMILY, inh_series,
 784                           inh_shape, Color_math},
 785         {"mathds",        DS_FAMILY, inh_series,
 786                           inh_shape, Color_math},
 787         {"mathtt",        TYPEWRITER_FAMILY, inh_series,
 788                           inh_shape, Color_math},
 789         {"mathit",        inh_family, inh_series,
 790                           ITALIC_SHAPE, Color_math},
 791         {"mathscr",       RSFS_FAMILY, inh_series,
 792                           inh_shape, Color_math},
 793         {"cmex",          CMEX_FAMILY, inh_series,
 794                           inh_shape, Color_math},
 795         {"cmm",           CMM_FAMILY, inh_series,
 796                           inh_shape, Color_math},
 797         {"cmr",           CMR_FAMILY, inh_series,
 798                           inh_shape, Color_math},
 799         {"cmsy",          CMSY_FAMILY, inh_series,
 800                           inh_shape, Color_math},
 801         {"eufrak",        EUFRAK_FAMILY, inh_series,
 802                           inh_shape, Color_math},
 803         {"msa",           MSA_FAMILY, inh_series,
 804                           inh_shape, Color_math},
 805         {"msb",           MSB_FAMILY, inh_series,
 806                           inh_shape, Color_math},
 807         {"stmry",         STMARY_FAMILY, inh_series,
 808                           inh_shape, Color_math},
 809         {"wasy",          WASY_FAMILY, inh_series,
 810                           inh_shape, Color_math},
 811         {"esint",         ESINT_FAMILY, inh_series,
 812                           inh_shape, Color_math},
 813
 814         // Text fonts
 815         {"text",          inh_family, inh_series,
 816                           inh_shape, Color_foreground},
 817         {"textbf",        inh_family, BOLD_SERIES,
 818                           inh_shape, Color_foreground},
 819         {"textit",        inh_family, inh_series,
 820                           ITALIC_SHAPE, Color_foreground},
 821         {"textmd",        inh_family, MEDIUM_SERIES,
 822                           inh_shape, Color_foreground},
 823         {"textnormal",    inh_family, inh_series,
 824                           UP_SHAPE, Color_foreground},
 825         {"textrm",        ROMAN_FAMILY,
 826                           inh_series, UP_SHAPE,Color_foreground},
 827         {"textsc",        inh_family, inh_series,
 828                           SMALLCAPS_SHAPE, Color_foreground},
 829         {"textsf",        SANS_FAMILY, inh_series,
 830                           inh_shape, Color_foreground},
 831         {"textsl",        inh_family, inh_series,
 832                           SLANTED_SHAPE, Color_foreground},
 833         {"texttt",        TYPEWRITER_FAMILY, inh_series,
 834                           inh_shape, Color_foreground},
 835         {"textup",        inh_family, inh_series,
 836                           UP_SHAPE, Color_foreground},
 837
 838         // TIPA support
 839         {"textipa",       inh_family, inh_series,
 840                           inh_shape, Color_foreground},
 841
 842         // mhchem support
 843         {"ce",            inh_family, inh_series,
 844                           inh_shape, Color_foreground},
 845         {"cf",            inh_family, inh_series,
 846                           inh_shape, Color_foreground},
 847
 848         // LyX internal usage
 849         {"lyxtex",        inh_family, inh_series,
 850                           UP_SHAPE, Color_latex},
 851         // FIXME: The following two don't work on OS X, since the Symbol font
 852         //        uses a different encoding, and is therefore disabled in
 853         //        FontLoader::available().
 854         {"lyxsymbol",     SYMBOL_FAMILY, inh_series,
 855                           inh_shape, Color_math},
 856         {"lyxboldsymbol", SYMBOL_FAMILY, BOLD_SERIES,
 857                           inh_shape, Color_math},
 858         {"lyxblacktext",  ROMAN_FAMILY, MEDIUM_SERIES,
 859                           UP_SHAPE, Color_foreground},
 860         {"lyxnochange",   inh_family, inh_series,
 861                           inh_shape, Color_foreground},
 862         {"lyxfakebb",     TYPEWRITER_FAMILY, BOLD_SERIES,
 863                           UP_SHAPE, Color_math},
 864         {"lyxfakecal",    SANS_FAMILY, MEDIUM_SERIES,
 865                           ITALIC_SHAPE, Color_math},
 866         {"lyxfakefrak",   ROMAN_FAMILY, BOLD_SERIES,
 867                           ITALIC_SHAPE, Color_math}
 868 };
 869
 870
 871 fontinfo * lookupFont(string const & name)
 872 {
 873         //lyxerr << "searching font '" << name << "'" << endl;
 874         int const n = sizeof(fontinfos) / sizeof(fontinfo);
 875         for (int i = 0; i < n; ++i)
 876                 if (fontinfos[i].cmd_ == name) {
 877                         //lyxerr << "found '" << i << "'" << endl;
 878                         return fontinfos + i;
 879                 }
 880         return 0;
 881 }
 882
 883
 884 fontinfo * searchFont(string const & name)
 885 {
 886         fontinfo * f = lookupFont(name);
 887         return f ? f : fontinfos;
 888         // this should be mathnormal
 889         //return searchFont("mathnormal");
 890 }
 891
 892
 893 bool isFontName(string const & name)
 894 {
 895         return lookupFont(name);
 896 }
 897
 898
 899 bool isMathFont(string const & name)
 900 {
 901         fontinfo * f = lookupFont(name);
 902         return f && f->color_ == Color_math;
 903 }
 904
 905
 906 bool isTextFont(string const & name)
 907 {
 908         fontinfo * f = lookupFont(name);
 909         return f && f->color_ == Color_foreground;
 910 }
 911
 912
 913 FontInfo getFont(string const & name)
 914 {
 915         FontInfo font;
 916         augmentFont(font, name);
 917         return font;
 918 }
 919
 920
 921 void fakeFont(string const & orig, string const & fake)
 922 {
 923         fontinfo * forig = searchFont(orig);
 924         fontinfo * ffake = searchFont(fake);
 925         if (forig && ffake) {
 926                 forig->family_ = ffake->family_;
 927                 forig->series_ = ffake->series_;
 928                 forig->shape_  = ffake->shape_;
 929                 forig->color_  = ffake->color_;
 930         } else {
 931                 lyxerr << "Can't fake font '" << orig << "' with '"
 932                        << fake << "'" << endl;
 933         }
 934 }
 935
 936
 937 void augmentFont(FontInfo & font, string const & name)
 938 {
 939         static bool initialized = false;
 940         if (!initialized) {
 941                 initialized = true;
 942                 // fake fonts if necessary
 943                 if (!theFontLoader().available(getFont("mathfrak")))
 944                         fakeFont("mathfrak", "lyxfakefrak");
 945                 if (!theFontLoader().available(getFont("mathcal")))
 946                         fakeFont("mathcal", "lyxfakecal");
 947         }
 948         fontinfo * info = searchFont(name);
 949         if (info->family_ != inh_family)
 950                 font.setFamily(info->family_);
 951         if (info->series_ != inh_series)
 952                 font.setSeries(info->series_);
 953         if (info->shape_ != inh_shape)
 954                 font.setShape(info->shape_);
 955         if (info->color_ != Color_none)
 956                 font.setColor(info->color_);
 957 }
 958
 959
 960 bool isAlphaSymbol(MathAtom const & at)
 961 {
 962         if (at->asCharInset() ||
 963             (at->asSymbolInset() &&
 964              at->asSymbolInset()->isOrdAlpha()))
 965                 return true;
 966
 967         if (at->asFontInset()) {
 968                 MathData const & ar = at->asFontInset()->cell(0);
 969                 for (size_t i = 0; i < ar.size(); ++i) {
 970                         if (!(ar[i]->asCharInset() ||
 971                               (ar[i]->asSymbolInset() &&
 972                                ar[i]->asSymbolInset()->isOrdAlpha())))
 973                                 return false;
 974                 }
 975                 return true;
 976         }
 977         return false;
 978 }
 979
 980
 981 docstring asString(MathData const & ar)
 982 {
 983         odocstringstream os;
 984         otexrowstream ots(os);
 985         WriteStream ws(ots);
 986         ws << ar;
 987         return os.str();
 988 }
 989
 990
 991 void asArray(docstring const & str, MathData & ar, Parse::flags pf)
 992 {
 993         // If the QUIET flag is set, we are going to parse for either
 994         // a paste operation or a macro definition. We try to do the
 995         // right thing in all cases.
 996
 997         bool quiet = pf & Parse::QUIET;
 998         bool macro = pf & Parse::MACRODEF;
 999         if ((str.size() == 1 && quiet) || (!mathed_parse_cell(ar, str, pf) && quiet && !macro))
1000                 mathed_parse_cell(ar, str, pf | Parse::VERBATIM);
1001 }
1002
1003
1004 docstring asString(InsetMath const & inset)
1005 {
1006         odocstringstream os;
1007         otexrowstream ots(os);
1008         WriteStream ws(ots);
1009         inset.write(ws);
1010         return os.str();
1011 }
1012
1013
1014 docstring asString(MathAtom const & at)
1015 {
1016         odocstringstream os;
1017         otexrowstream ots(os);
1018         WriteStream ws(ots);
1019         at->write(ws);
1020         return os.str();
1021 }
1022
1023
1024 int axis_height(MetricsBase & mb)
1025 {
1026         Changer dummy = mb.changeFontSet("mathnormal");
1027         return theFontMetrics(mb.font).ascent('-') - 1;
1028 }
1029
1030
1031 void validate_math_word(LaTeXFeatures & features, docstring const & word)
1032 {
1033         MathWordList const & words = mathedWordList();
1034         MathWordList::const_iterator it = words.find(word);
1035         if (it != words.end()) {
1036                 string const req = it->second.required;
1037                 if (!req.empty())
1038                         features.require(req);
1039         }
1040 }
1041
1042
1043 } // namespace lyx