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 int mathedSymbolDim(MetricsBase & mb, Dimension & dim, latexkeys const * sym)
 684 {
 685         LASSERT((bool)sym, return 0);
 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         return mathed_char_kerning(mb.font, mathedSymbol(mb, sym).back());
 698 }
 699
 700
 701 void mathedSymbolDraw(PainterInfo & pi, int x, int y, latexkeys const * sym)
 702 {
 703         LASSERT((bool)sym, return);
 704         //lyxerr << "drawing: symbol: '" << sym->name
 705         //      << "' in font: '" << sym->inset
 706         //      << "' drawn as: '" << sym->draw
 707         //      << "'" << endl;
 708
 709         bool const italic_upcase_greek = sym->inset == "cmr" &&
 710                 sym->extra == "mathalpha" &&
 711                 pi.base.fontname == "mathit";
 712         std::string const font = italic_upcase_greek ? "cmm" : sym->inset;
 713
 714         Changer dummy = pi.base.changeFontSet(font);
 715         pi.draw(x, y, mathedSymbol(pi.base, sym));
 716 }
 717
 718
 719 void metricsStrRedBlack(MetricsInfo & mi, Dimension & dim, docstring const & str)
 720 {
 721         FontInfo font = mi.base.font;
 722         augmentFont(font, "mathnormal");
 723         mathed_string_dim(font, str, dim);
 724 }
 725
 726
 727 void drawStrRed(PainterInfo & pi, int x, int y, docstring const & str)
 728 {
 729         FontInfo f = pi.base.font;
 730         augmentFont(f, "mathnormal");
 731         f.setColor(Color_latex);
 732         pi.pain.text(x, y, str, f);
 733 }
 734
 735
 736 void drawStrBlack(PainterInfo & pi, int x, int y, docstring const & str)
 737 {
 738         FontInfo f = pi.base.font;
 739         augmentFont(f, "mathnormal");
 740         f.setColor(Color_foreground);
 741         pi.pain.text(x, y, str, f);
 742 }
 743
 744
 745 void math_font_max_dim(FontInfo const & font, int & asc, int & des)
 746 {
 747         frontend::FontMetrics const & fm = theFontMetrics(font);
 748         asc = fm.maxAscent();
 749         des = fm.maxDescent();
 750 }
 751
 752
 753 struct fontinfo {
 754         string cmd_;
 755         FontFamily family_;
 756         FontSeries series_;
 757         FontShape  shape_;
 758         ColorCode        color_;
 759 };
 760
 761
 762 FontFamily const inh_family = INHERIT_FAMILY;
 763 FontSeries const inh_series = INHERIT_SERIES;
 764 FontShape  const inh_shape  = INHERIT_SHAPE;
 765
 766
 767 // mathnormal should be the first, otherwise the fallback further down
 768 // does not work
 769 fontinfo fontinfos[] = {
 770         // math fonts
 771         // Color_math determines which fonts are math (see isMathFont)
 772         {"mathnormal",    ROMAN_FAMILY, MEDIUM_SERIES,
 773                           ITALIC_SHAPE, Color_math},
 774         {"mathbf",        inh_family, BOLD_SERIES,
 775                           inh_shape, Color_math},
 776         {"mathcal",       CMSY_FAMILY, inh_series,
 777                           inh_shape, Color_math},
 778         {"mathfrak",      EUFRAK_FAMILY, inh_series,
 779                           inh_shape, Color_math},
 780         {"mathrm",        ROMAN_FAMILY, inh_series,
 781                           UP_SHAPE, Color_math},
 782         {"mathsf",        SANS_FAMILY, inh_series,
 783                           inh_shape, Color_math},
 784         {"mathbb",        MSB_FAMILY, inh_series,
 785                           inh_shape, Color_math},
 786         {"mathds",        DS_FAMILY, inh_series,
 787                           inh_shape, Color_math},
 788         {"mathtt",        TYPEWRITER_FAMILY, inh_series,
 789                           inh_shape, Color_math},
 790         {"mathit",        inh_family, inh_series,
 791                           ITALIC_SHAPE, Color_math},
 792         {"mathscr",       RSFS_FAMILY, inh_series,
 793                           inh_shape, Color_math},
 794         {"cmex",          CMEX_FAMILY, inh_series,
 795                           inh_shape, Color_math},
 796         {"cmm",           CMM_FAMILY, inh_series,
 797                           inh_shape, Color_math},
 798         {"cmr",           CMR_FAMILY, inh_series,
 799                           inh_shape, Color_math},
 800         {"cmsy",          CMSY_FAMILY, inh_series,
 801                           inh_shape, Color_math},
 802         {"eufrak",        EUFRAK_FAMILY, inh_series,
 803                           inh_shape, Color_math},
 804         {"msa",           MSA_FAMILY, inh_series,
 805                           inh_shape, Color_math},
 806         {"msb",           MSB_FAMILY, inh_series,
 807                           inh_shape, Color_math},
 808         {"stmry",         STMARY_FAMILY, inh_series,
 809                           inh_shape, Color_math},
 810         {"wasy",          WASY_FAMILY, inh_series,
 811                           inh_shape, Color_math},
 812         {"esint",         ESINT_FAMILY, inh_series,
 813                           inh_shape, Color_math},
 814
 815         // Text fonts
 816         {"text",          inh_family, inh_series,
 817                           inh_shape, Color_foreground},
 818         {"textbf",        inh_family, BOLD_SERIES,
 819                           inh_shape, Color_foreground},
 820         {"textit",        inh_family, inh_series,
 821                           ITALIC_SHAPE, Color_foreground},
 822         {"textmd",        inh_family, MEDIUM_SERIES,
 823                           inh_shape, Color_foreground},
 824         {"textnormal",    inh_family, inh_series,
 825                           UP_SHAPE, Color_foreground},
 826         {"textrm",        ROMAN_FAMILY,
 827                           inh_series, UP_SHAPE,Color_foreground},
 828         {"textsc",        inh_family, inh_series,
 829                           SMALLCAPS_SHAPE, Color_foreground},
 830         {"textsf",        SANS_FAMILY, inh_series,
 831                           inh_shape, Color_foreground},
 832         {"textsl",        inh_family, inh_series,
 833                           SLANTED_SHAPE, Color_foreground},
 834         {"texttt",        TYPEWRITER_FAMILY, inh_series,
 835                           inh_shape, Color_foreground},
 836         {"textup",        inh_family, inh_series,
 837                           UP_SHAPE, Color_foreground},
 838
 839         // TIPA support
 840         {"textipa",       inh_family, inh_series,
 841                           inh_shape, Color_foreground},
 842
 843         // mhchem support
 844         {"ce",            inh_family, inh_series,
 845                           inh_shape, Color_foreground},
 846         {"cf",            inh_family, inh_series,
 847                           inh_shape, Color_foreground},
 848
 849         // LyX internal usage
 850         {"lyxtex",        inh_family, inh_series,
 851                           UP_SHAPE, Color_latex},
 852         // FIXME: The following two don't work on OS X, since the Symbol font
 853         //        uses a different encoding, and is therefore disabled in
 854         //        FontLoader::available().
 855         {"lyxsymbol",     SYMBOL_FAMILY, inh_series,
 856                           inh_shape, Color_math},
 857         {"lyxboldsymbol", SYMBOL_FAMILY, BOLD_SERIES,
 858                           inh_shape, Color_math},
 859         {"lyxblacktext",  ROMAN_FAMILY, MEDIUM_SERIES,
 860                           UP_SHAPE, Color_foreground},
 861         {"lyxnochange",   inh_family, inh_series,
 862                           inh_shape, Color_foreground},
 863         {"lyxfakebb",     TYPEWRITER_FAMILY, BOLD_SERIES,
 864                           UP_SHAPE, Color_math},
 865         {"lyxfakecal",    SANS_FAMILY, MEDIUM_SERIES,
 866                           ITALIC_SHAPE, Color_math},
 867         {"lyxfakefrak",   ROMAN_FAMILY, BOLD_SERIES,
 868                           ITALIC_SHAPE, Color_math}
 869 };
 870
 871
 872 fontinfo * lookupFont(string const & name)
 873 {
 874         //lyxerr << "searching font '" << name << "'" << endl;
 875         int const n = sizeof(fontinfos) / sizeof(fontinfo);
 876         for (int i = 0; i < n; ++i)
 877                 if (fontinfos[i].cmd_ == name) {
 878                         //lyxerr << "found '" << i << "'" << endl;
 879                         return fontinfos + i;
 880                 }
 881         return 0;
 882 }
 883
 884
 885 fontinfo * searchFont(string const & name)
 886 {
 887         fontinfo * f = lookupFont(name);
 888         return f ? f : fontinfos;
 889         // this should be mathnormal
 890         //return searchFont("mathnormal");
 891 }
 892
 893
 894 bool isFontName(string const & name)
 895 {
 896         return lookupFont(name);
 897 }
 898
 899
 900 bool isMathFont(string const & name)
 901 {
 902         fontinfo * f = lookupFont(name);
 903         return f && f->color_ == Color_math;
 904 }
 905
 906
 907 bool isTextFont(string const & name)
 908 {
 909         fontinfo * f = lookupFont(name);
 910         return f && f->color_ == Color_foreground;
 911 }
 912
 913
 914 FontInfo getFont(string const & name)
 915 {
 916         FontInfo font;
 917         augmentFont(font, name);
 918         return font;
 919 }
 920
 921
 922 void fakeFont(string const & orig, string const & fake)
 923 {
 924         fontinfo * forig = searchFont(orig);
 925         fontinfo * ffake = searchFont(fake);
 926         if (forig && ffake) {
 927                 forig->family_ = ffake->family_;
 928                 forig->series_ = ffake->series_;
 929                 forig->shape_  = ffake->shape_;
 930                 forig->color_  = ffake->color_;
 931         } else {
 932                 lyxerr << "Can't fake font '" << orig << "' with '"
 933                        << fake << "'" << endl;
 934         }
 935 }
 936
 937
 938 void augmentFont(FontInfo & font, string const & name)
 939 {
 940         static bool initialized = false;
 941         if (!initialized) {
 942                 initialized = true;
 943                 // fake fonts if necessary
 944                 if (!theFontLoader().available(getFont("mathfrak")))
 945                         fakeFont("mathfrak", "lyxfakefrak");
 946                 if (!theFontLoader().available(getFont("mathcal")))
 947                         fakeFont("mathcal", "lyxfakecal");
 948         }
 949         fontinfo * info = searchFont(name);
 950         if (info->family_ != inh_family)
 951                 font.setFamily(info->family_);
 952         if (info->series_ != inh_series)
 953                 font.setSeries(info->series_);
 954         if (info->shape_ != inh_shape)
 955                 font.setShape(info->shape_);
 956         if (info->color_ != Color_none)
 957                 font.setColor(info->color_);
 958 }
 959
 960
 961 bool isAlphaSymbol(MathAtom const & at)
 962 {
 963         if (at->asCharInset() ||
 964             (at->asSymbolInset() &&
 965              at->asSymbolInset()->isOrdAlpha()))
 966                 return true;
 967
 968         if (at->asFontInset()) {
 969                 MathData const & ar = at->asFontInset()->cell(0);
 970                 for (size_t i = 0; i < ar.size(); ++i) {
 971                         if (!(ar[i]->asCharInset() ||
 972                               (ar[i]->asSymbolInset() &&
 973                                ar[i]->asSymbolInset()->isOrdAlpha())))
 974                                 return false;
 975                 }
 976                 return true;
 977         }
 978         return false;
 979 }
 980
 981
 982 docstring asString(MathData const & ar)
 983 {
 984         odocstringstream os;
 985         otexrowstream ots(os);
 986         WriteStream ws(ots);
 987         ws << ar;
 988         return os.str();
 989 }
 990
 991
 992 void asArray(docstring const & str, MathData & ar, Parse::flags pf)
 993 {
 994         // If the QUIET flag is set, we are going to parse for either
 995         // a paste operation or a macro definition. We try to do the
 996         // right thing in all cases.
 997
 998         bool quiet = pf & Parse::QUIET;
 999         bool macro = pf & Parse::MACRODEF;
1000         if ((str.size() == 1 && quiet) || (!mathed_parse_cell(ar, str, pf) && quiet && !macro))
1001                 mathed_parse_cell(ar, str, pf | Parse::VERBATIM);
1002 }
1003
1004
1005 docstring asString(InsetMath const & inset)
1006 {
1007         odocstringstream os;
1008         otexrowstream ots(os);
1009         WriteStream ws(ots);
1010         inset.write(ws);
1011         return os.str();
1012 }
1013
1014
1015 docstring asString(MathAtom const & at)
1016 {
1017         odocstringstream os;
1018         otexrowstream ots(os);
1019         WriteStream ws(ots);
1020         at->write(ws);
1021         return os.str();
1022 }
1023
1024
1025 int axis_height(MetricsBase & mb)
1026 {
1027         Changer dummy = mb.changeFontSet("mathnormal");
1028         return theFontMetrics(mb.font).ascent('-') - 1;
1029 }
1030
1031
1032 void validate_math_word(LaTeXFeatures & features, docstring const & word)
1033 {
1034         MathWordList const & words = mathedWordList();
1035         MathWordList::const_iterator it = words.find(word);
1036         if (it != words.end()) {
1037                 string const req = it->second.required;
1038                 if (!req.empty())
1039                         features.require(req);
1040         }
1041 }
1042
1043
1044 } // namespace lyx