src/mathed/math_support.C

   1 #include <config.h>
   2
   3 #include <map>
   4
   5 #include "math_support.h"
   6 #include "lyxfont.h"
   7 #include "math_cursor.h"
   8 #include "math_inset.h"
   9 #include "math_parser.h"
  10 #include "frontends/Painter.h"
  11 #include "frontends/font_metrics.h"
  12 #include "frontends/font_loader.h"
  13 #include "debug.h"
  14 #include "commandtags.h"
  15 #include "dimension.h"
  16
  17 using std::map;
  18 using std::endl;
  19 using std::max;
  20
  21
  22 ///
  23 class Matrix {
  24 public:
  25         ///
  26         Matrix(int, double, double);
  27         ///
  28         void transform(double &, double &);
  29 private:
  30         ///
  31         double m_[2][2];
  32 };
  33
  34
  35 Matrix::Matrix(int code, double x, double y)
  36 {
  37         double const cs = (code & 1) ? 0 : (1 - code);
  38         double const sn = (code & 1) ? (2 - code) : 0;
  39         m_[0][0] =  cs * x;
  40         m_[0][1] =  sn * x;
  41         m_[1][0] = -sn * y;
  42         m_[1][1] =  cs * y;
  43 }
  44
  45
  46 void Matrix::transform(double & x, double & y)
  47 {
  48         double xx = m_[0][0] * x + m_[0][1] * y;
  49         double yy = m_[1][0] * x + m_[1][1] * y;
  50         x = xx;
  51         y = yy;
  52 }
  53
  54
  55
  56 namespace {
  57
  58 /*
  59  * Internal struct of a drawing: code n x1 y1 ... xn yn, where code is:
  60  * 0 = end, 1 = line, 2 = polyline, 3 = square line, 4 = square polyline
  61  */
  62
  63
  64 double const parenthHigh[] = {
  65         2, 13,
  66         0.9840, 0.0014, 0.7143, 0.0323, 0.4603, 0.0772,
  67         0.2540, 0.1278, 0.1746, 0.1966, 0.0952, 0.3300,
  68         0.0950, 0.5000, 0.0952, 0.6700, 0.1746, 0.8034,
  69         0.2540, 0.8722, 0.4603, 0.9228, 0.7143, 0.9677,
  70         0.9840, 0.9986,
  71         0
  72 };
  73
  74
  75 double const parenth[] = {
  76         2, 13,
  77         0.9930, 0.0071, 0.7324, 0.0578, 0.5141, 0.1126,
  78         0.3380, 0.1714, 0.2183, 0.2333, 0.0634, 0.3621,
  79         0.0141, 0.5000, 0.0563, 0.6369, 0.2113, 0.7647,
  80         0.3310, 0.8276, 0.5070, 0.8864, 0.7254, 0.9412,
  81         0.9930, 0.9919,
  82         0
  83 };
  84
  85
  86 double const brace[] = {
  87         2, 21,
  88         0.9492, 0.0020, 0.9379, 0.0020, 0.7458, 0.0243,
  89         0.5819, 0.0527, 0.4859, 0.0892, 0.4463, 0.1278,
  90         0.4463, 0.3732, 0.4011, 0.4199, 0.2712, 0.4615,
  91         0.0734, 0.4919, 0.0113, 0.5000, 0.0734, 0.5081,
  92         0.2712, 0.5385, 0.4011, 0.5801, 0.4463, 0.6268,
  93         0.4463, 0.8722, 0.4859, 0.9108, 0.5819, 0.9473,
  94         0.7458, 0.9757, 0.9379, 0.9980, 0.9492, 0.9980,
  95         0
  96 };
  97
  98
  99 double const arrow[] = {
 100         4, 7,
 101         0.0150, 0.7500, 0.2000, 0.6000, 0.3500, 0.3500,
 102         0.5000, 0.0500, 0.6500, 0.3500, 0.8000, 0.6000,
 103         0.9500, 0.7500,
 104         3, 0.5000, 0.1500, 0.5000, 0.9500,
 105         0
 106 };
 107
 108
 109 double const Arrow[] = {
 110         4, 7,
 111         0.0150, 0.7500, 0.2000, 0.6000, 0.3500, 0.3500,
 112         0.5000, 0.0500, 0.6500, 0.3500, 0.8000, 0.6000,
 113         0.9500, 0.7500,
 114         3, 0.3500, 0.5000, 0.3500, 0.9500,
 115         3, 0.6500, 0.5000, 0.6500, 0.9500,
 116         0
 117 };
 118
 119
 120 double const udarrow[] = {
 121         2, 3,
 122         0.015, 0.25,  0.5, 0.05, 0.95, 0.25,
 123         2, 3,
 124         0.015, 0.75,  0.5, 0.95, 0.95, 0.75,
 125         1, 0.5, 0.2,  0.5, 0.8,
 126         0
 127 };
 128
 129
 130 double const Udarrow[] = {
 131         2, 3,
 132         0.015, 0.25,  0.5, 0.05, 0.95, 0.25,
 133         2, 3,
 134         0.015, 0.75,  0.5, 0.95, 0.95, 0.75,
 135         1, 0.35, 0.2, 0.35, 0.8,
 136         1, 0.65, 0.2, 0.65, 0.8,
 137         0
 138 };
 139
 140
 141 double const brack[] = {
 142         2, 4,
 143         0.95, 0.05,  0.05, 0.05,  0.05, 0.95,  0.95, 0.95,
 144         0
 145 };
 146
 147
 148 double const corner[] = {
 149         2, 3,
 150         0.95, 0.05,  0.05, 0.05,  0.05, 0.95,
 151         0
 152 };
 153
 154
 155 double const angle[] = {
 156         2, 3,
 157         1, 0,  0.05, 0.5,  1, 1,
 158         0
 159 };
 160
 161
 162 double const slash[] = {
 163         1, 0.95, 0.05, 0.05, 0.95,
 164         0
 165 };
 166
 167
 168 double const hline[] = {
 169         1, 0.00, 0.5, 1.0, 0.5,
 170         0
 171 };
 172
 173
 174 double const ddot[] = {
 175         1, 0.2, 0.5,  0.3, 0.5,
 176         1, 0.7, 0.5,  0.8, 0.5,
 177         0
 178 };
 179
 180
 181 double const dddot[] = {
 182         1, 0.1, 0.5,  0.2, 0.5,
 183         1, 0.45, 0.5, 0.55, 0.5,
 184         1, 0.8, 0.5,  0.9, 0.5,
 185         0
 186 };
 187
 188
 189 double const hline3[] = {
 190         1, 0.1,   0,  0.15,  0,
 191         1, 0.475, 0,  0.525, 0,
 192         1, 0.85,  0,  0.9,   0,
 193         0
 194 };
 195
 196
 197 double const dline3[] = {
 198         1, 0.1,   0.1,   0.15,  0.15,
 199         1, 0.475, 0.475, 0.525, 0.525,
 200         1, 0.85,  0.85,  0.9,   0.9,
 201         0
 202 };
 203
 204
 205 double const hlinesmall[] = {
 206         1, 0.4, 0.5, 0.6, 0.5,
 207         0
 208 };
 209
 210
 211 double const ring[] = {
 212         2, 5,
 213         0.5, 0.8,  0.8, 0.5,  0.5, 0.2,  0.2, 0.5,  0.5, 0.8,
 214         0
 215 };
 216
 217
 218 double const vert[] = {
 219         1, 0.5, 0.05,  0.5, 0.95,
 220         0
 221 };
 222
 223
 224 double const  Vert[] = {
 225         1, 0.3, 0.05,  0.3, 0.95,
 226         1, 0.7, 0.05,  0.7, 0.95,
 227         0
 228 };
 229
 230
 231 double const tilde[] = {
 232         2, 4,
 233         0.00, 0.8,  0.25, 0.2,  0.75, 0.8,  1.00, 0.2,
 234         0
 235 };
 236
 237
 238 struct deco_struct {
 239         double const * data;
 240         int angle;
 241 };
 242
 243 struct named_deco_struct {
 244         char const * name;
 245         double const * data;
 246         int angle;
 247 };
 248
 249 named_deco_struct deco_table[] = {
 250         // Decorations
 251         {"widehat",             angle,    3 },
 252         {"widetilde",           tilde,    0 },
 253         {"underbar",            hline,    0 },
 254         {"underline",           hline,    0 },
 255         {"overline",            hline,    0 },
 256         {"underbrace",          brace,    1 },
 257         {"overbrace",           brace,    3 },
 258         {"overleftarrow",       arrow,    1 },
 259         {"overrightarrow",      arrow,    3 },
 260         {"overleftrightarrow",  udarrow,  1 },
 261         {"xleftarrow",          arrow,    1 },
 262         {"xrightarrow",         arrow,    3 },
 263         {"underleftarrow",      arrow,    1 },
 264         {"underrightarrow",     arrow,    3 },
 265         {"underleftrightarrow", udarrow,  1 },
 266
 267         // Delimiters
 268         {"(",              parenth,    0 },
 269         {")",              parenth,    2 },
 270         {"{",              brace,      0 },
 271         {"}",              brace,      2 },
 272         {"[",              brack,      0 },
 273         {"]",              brack,      2 },
 274         {"|",              vert,       0 },
 275         {"/",              slash,      0 },
 276         {"vert",           vert,       0 },
 277         {"Vert",           Vert,       0 },
 278         {"'",              slash,      1 },
 279         {"backslash",      slash,      1 },
 280         {"langle",         angle,      0 },
 281         {"lceil",          corner,     0 },
 282         {"lfloor",         corner,     1 },
 283         {"rangle",         angle,      2 },
 284         {"rceil",          corner,     3 },
 285         {"rfloor",         corner,     2 },
 286         {"downarrow",      arrow,      2 },
 287         {"Downarrow",      Arrow,      2 },
 288         {"uparrow",        arrow,      0 },
 289         {"Uparrow",        Arrow,      0 },
 290         {"updownarrow",    udarrow,    0 },
 291         {"Updownarrow",    Udarrow,    0 },
 292
 293         // Accents
 294         {"ddot",           ddot,       0 },
 295         {"dddot",          dddot,      0 },
 296         {"hat",            angle,      3 },
 297         {"grave",          slash,      1 },
 298         {"acute",          slash,      0 },
 299         {"tilde",          tilde,      0 },
 300         {"bar",            hline,      0 },
 301         {"dot",            hlinesmall, 0 },
 302         {"check",          angle,      1 },
 303         {"breve",          parenth,    1 },
 304         {"vec",            arrow,      3 },
 305         {"mathring",       ring,       0 },
 306
 307         // Dots
 308         {"ldots",          hline3,     0 },
 309         {"cdots",          hline3,     0 },
 310         {"vdots",          hline3,     1 },
 311         {"ddots",          dline3,     0 },
 312         {"dotsb",          hline3,     0 },
 313         {"dotsc",          hline3,     0 },
 314         {"dotsi",          hline3,     0 },
 315         {"dotsm",          hline3,     0 },
 316         {"dotso",          hline3,     0 }
 317 };
 318
 319
 320 map<string, deco_struct> deco_list;
 321
 322 // sort the table on startup
 323 struct init_deco_table {
 324         init_deco_table() {
 325                 unsigned const n = sizeof(deco_table) / sizeof(deco_table[0]);
 326                 for (named_deco_struct * p = deco_table; p != deco_table + n; ++p) {
 327                         deco_struct d;
 328                         d.data  = p->data;
 329                         d.angle = p->angle;
 330                         deco_list[p->name]= d;
 331                 }
 332         }
 333 };
 334
 335 static init_deco_table dummy;
 336
 337
 338 deco_struct const * search_deco(string const & name)
 339 {
 340         map<string, deco_struct>::const_iterator p = deco_list.find(name);
 341         return (p == deco_list.end()) ? 0 : &(p->second);
 342 }
 343
 344
 345 } // namespace anon
 346
 347
 348 void mathed_char_dim(LyXFont const & font, unsigned char c, Dimension & dim)
 349 {
 350         dim.d = font_metrics::descent(c, font);
 351         dim.a = font_metrics::ascent(c, font);
 352         dim.w = mathed_char_width(font, c);
 353 }
 354
 355
 356 int mathed_char_ascent(LyXFont const & font, unsigned char c)
 357 {
 358         return font_metrics::ascent(c, font);
 359 }
 360
 361
 362 int mathed_char_descent(LyXFont const & font, unsigned char c)
 363 {
 364         return font_metrics::descent(c, font);
 365 }
 366
 367
 368 int mathed_char_width(LyXFont const & font, unsigned char c)
 369 {
 370         return font_metrics::width(c, font);
 371 }
 372
 373
 374 void mathed_string_dim(LyXFont const & font, string const & s, Dimension & dim)
 375 {
 376 #if 1
 377         dim.a = 0;
 378         dim.d = 0;
 379         for (string::const_iterator it = s.begin(); it != s.end(); ++it) {
 380                 dim.a = max(dim.a, font_metrics::ascent(*it, font));
 381                 dim.d = max(dim.d, font_metrics::descent(*it, font));
 382         }
 383 #else
 384         dim.a = font_metrics::maxAscent(font);
 385         dim.d = font_metrics::maxDescent(font);
 386 #endif
 387         dim.w = font_metrics::width(s, font);
 388 }
 389
 390
 391 int mathed_string_width(LyXFont const & font, string const & s)
 392 {
 393         return font_metrics::width(s, font);
 394 }
 395
 396
 397 void mathed_draw_deco(MathPainterInfo & pi, int x, int y, int w, int h,
 398         const string & name)
 399 {
 400         if (name == ".") {
 401                 pi.pain.line(x + w/2, y, x + w/2, y + h,
 402                           LColor::mathcursor, Painter::line_onoffdash);
 403                 return;
 404         }
 405
 406         deco_struct const * mds = search_deco(name);
 407         if (!mds) {
 408                 lyxerr << "Deco was not found. Programming error?\n";
 409                 lyxerr << "name: '" << name << "'\n";
 410                 return;
 411         }
 412
 413         int const n = (w < h) ? w : h;
 414         int const r = mds->angle;
 415         double const * d = mds->data;
 416
 417         if (h > 70 && (name == "(" || name == ")"))
 418                 d = parenthHigh;
 419
 420         Matrix mt(r, w, h);
 421         Matrix sqmt(r, n, n);
 422
 423         if (r > 0 && r < 3)
 424                 y += h;
 425
 426         if (r >= 2)
 427                 x += w;
 428
 429         for (int i = 0; d[i]; ) {
 430                 int code = int(d[i++]);
 431                 if (code & 1) {  // code == 1 || code == 3
 432                         double xx = d[i++];
 433                         double yy = d[i++];
 434                         double x2 = d[i++];
 435                         double y2 = d[i++];
 436                         if (code == 3)
 437                                 sqmt.transform(xx, yy);
 438                         else
 439                                 mt.transform(xx, yy);
 440                         mt.transform(x2, y2);
 441                         pi.pain.line(
 442                                 x + int(xx + 0.5), y + int(yy + 0.5),
 443                                 x + int(x2 + 0.5), y + int(y2 + 0.5),
 444                                 LColor::math);
 445                 }       else {
 446                         int xp[32];
 447                         int yp[32];
 448                         int const n = int(d[i++]);
 449                         for (int j = 0; j < n; ++j) {
 450                                 double xx = d[i++];
 451                                 double yy = d[i++];
 452 //           lyxerr << " " << xx << " " << yy << " ";
 453                                 if (code == 4)
 454                                         sqmt.transform(xx, yy);
 455                                 else
 456                                         mt.transform(xx, yy);
 457                                 xp[j] = x + int(xx + 0.5);
 458                                 yp[j] = y + int(yy + 0.5);
 459                                 //  lyxerr << "P[" << j " " << xx << " " << yy << " " << x << " " << y << "]";
 460                         }
 461                         pi.pain.lines(xp, yp, n, LColor::math);
 462                 }
 463         }
 464 }
 465
 466
 467 void mathed_draw_framebox(MathPainterInfo & pi, int x, int y, MathInset const * p)
 468 {
 469         if (mathcursor && mathcursor->isInside(p))
 470                 pi.pain.rectangle(x, y - p->ascent(), p->width(), p->height(),
 471                         LColor::mathframe);
 472 }
 473
 474
 475 // In the future maybe we use a better fonts renderer
 476 void drawStr(MathPainterInfo & pi, LyXFont const & font,
 477         int x, int y, string const & str)
 478 {
 479         pi.pain.text(x, y, str, font);
 480 }
 481
 482
 483 void drawStrRed(MathPainterInfo & pi, int x, int y, string const & str)
 484 {
 485         LyXFont f = pi.base.font;
 486         f.setColor(LColor::latex);
 487         pi.pain.text(x, y, str, f);
 488 }
 489
 490
 491 void drawStrBlack(MathPainterInfo & pi, int x, int y, string const & str)
 492 {
 493         LyXFont f = pi.base.font;
 494         f.setColor(LColor::black);
 495         pi.pain.text(x, y, str, f);
 496 }
 497
 498
 499 void drawChar(MathPainterInfo & pi, LyXFont const & font, int x, int y, char c)
 500 {
 501         pi.pain.text(x, y, c, font);
 502 }
 503
 504
 505 void math_font_max_dim(LyXFont const & font, int & asc, int & des)
 506 {
 507         asc = font_metrics::maxAscent(font);
 508         des = font_metrics::maxDescent(font);
 509 }
 510
 511
 512 struct fontinfo {
 513         string cmd_;
 514         LyXFont::FONT_FAMILY family_;
 515         LyXFont::FONT_SERIES series_;
 516         LyXFont::FONT_SHAPE  shape_;
 517         LColor::color        color_;
 518 };
 519
 520
 521 LyXFont::FONT_FAMILY const inh_family = LyXFont::INHERIT_FAMILY;
 522 LyXFont::FONT_SERIES const inh_series = LyXFont::INHERIT_SERIES;
 523 LyXFont::FONT_SHAPE  const inh_shape  = LyXFont::INHERIT_SHAPE;
 524
 525
 526 // mathnormal should be the first, otherwise the fallback fuerther down
 527 // does not work
 528 fontinfo fontinfos[] = {
 529         {"mathnormal", inh_family,inh_series, LyXFont::UP_SHAPE, LColor::math},
 530         {"mathbf", inh_family, LyXFont::BOLD_SERIES, inh_shape, LColor::math},
 531         {"mathcal",LyXFont::CMSY_FAMILY, inh_series, inh_shape, LColor::math},
 532         {"mathfrak", LyXFont::EUFRAK_FAMILY, inh_series, inh_shape, LColor::math},
 533         {"mathrm", LyXFont::ROMAN_FAMILY, inh_series, inh_shape, LColor::math},
 534         {"mathsf", LyXFont::SANS_FAMILY, inh_series, inh_shape, LColor::math},
 535         {"cmex",   LyXFont::CMEX_FAMILY, inh_series, inh_shape, LColor::math},
 536         {"cmm",    LyXFont::CMM_FAMILY, inh_series, inh_shape, LColor::math},
 537         {"cmr",    LyXFont::CMR_FAMILY, inh_series, inh_shape, LColor::math},
 538         {"cmsy",   LyXFont::CMSY_FAMILY, inh_series, inh_shape, LColor::math},
 539         {"eufrak", LyXFont::EUFRAK_FAMILY, inh_series, inh_shape, LColor::math},
 540         {"msa",    LyXFont::MSA_FAMILY, inh_series, inh_shape, LColor::math},
 541         {"msb",    LyXFont::MSB_FAMILY, inh_series, inh_shape, LColor::math},
 542         {"wasy",   LyXFont::WASY_FAMILY, inh_series, inh_shape, LColor::math},
 543         {"text",   inh_family, inh_series, inh_shape, LColor::black},
 544         {"textbf", inh_family, LyXFont::BOLD_SERIES, inh_shape, LColor::black},
 545         {"textit", inh_family, inh_series, LyXFont::ITALIC_SHAPE, LColor::black},
 546         {"textmd", inh_family, LyXFont::MEDIUM_SERIES, inh_shape, LColor::black},
 547         {"textnormal", inh_family, inh_series, LyXFont::UP_SHAPE, LColor::black},
 548         {"textrm", LyXFont::ROMAN_FAMILY, inh_series,LyXFont::UP_SHAPE,LColor::black},
 549         {"textsc", inh_family, inh_series, LyXFont::SMALLCAPS_SHAPE, LColor::black},
 550         {"textsf", LyXFont::SANS_FAMILY, inh_series, inh_shape, LColor::black},
 551         {"textsl", inh_family, inh_series, LyXFont::SLANTED_SHAPE, LColor::black},
 552         {"texttt", LyXFont::TYPEWRITER_FAMILY, inh_series, inh_shape, LColor::black},
 553         {"textup", inh_family, inh_series, LyXFont::UP_SHAPE, LColor::black},
 554
 555         // TIPA support
 556         {"textipa",   inh_family, inh_series, inh_shape, LColor::black},
 557
 558         {"lyxtex", inh_family, inh_series, inh_shape, LColor::latex},
 559         {"lyxsymbol", LyXFont::SYMBOL_FAMILY, inh_series, inh_shape, LColor::math},
 560         {"lyxboldsymbol",
 561                 LyXFont::SYMBOL_FAMILY, LyXFont::BOLD_SERIES, inh_shape, LColor::math},
 562         {"lyxitsymbol", LyXFont::SYMBOL_FAMILY,
 563                 inh_series, LyXFont::ITALIC_SHAPE, LColor::math},
 564         {"lyxblacktext", LyXFont::ROMAN_FAMILY,
 565                 LyXFont::MEDIUM_SERIES, LyXFont::UP_SHAPE, LColor::black},
 566         {"lyxnochange", inh_family, inh_series, inh_shape, LColor::black},
 567
 568         {"lyxfakebb", LyXFont::TYPEWRITER_FAMILY, LyXFont::BOLD_SERIES,
 569                 LyXFont::UP_SHAPE, LColor::math},
 570         {"lyxfakecal", LyXFont::SANS_FAMILY, LyXFont::MEDIUM_SERIES,
 571                 LyXFont::ITALIC_SHAPE, LColor::math},
 572         {"lyxfakefrak", LyXFont::ROMAN_FAMILY, LyXFont::BOLD_SERIES,
 573                 LyXFont::ITALIC_SHAPE, LColor::math}
 574 };
 575
 576
 577 fontinfo * lookupFont(string const & name)
 578 {
 579         //lyxerr << "searching font '" << name << "'\n";
 580         int const n = sizeof(fontinfos) / sizeof(fontinfo);
 581         for (int i = 0; i < n; ++i)
 582                 if (fontinfos[i].cmd_ == name) {
 583                         //lyxerr << "found '" << i << "'\n";
 584                         return fontinfos + i;
 585                 }
 586         return 0;
 587 }
 588
 589
 590 fontinfo * searchFont(string const & name)
 591 {
 592         fontinfo * f = lookupFont(name);
 593         return f ? f : fontinfos;
 594         // this should be mathnormal
 595         //return searchFont("mathnormal");
 596 }
 597
 598
 599 bool isFontName(string const & name)
 600 {
 601         return lookupFont(name);
 602 }
 603
 604
 605 LyXFont getFont(string const & name)
 606 {
 607         LyXFont font;
 608         augmentFont(font, name);
 609         return font;
 610 }
 611
 612
 613 void fakeFont(string const & orig, string const & fake)
 614 {
 615         fontinfo * forig = searchFont(orig);
 616         fontinfo * ffake = searchFont(fake);
 617         if (forig && ffake) {
 618                 forig->family_ = ffake->family_;
 619                 forig->series_ = ffake->series_;
 620                 forig->shape_  = ffake->shape_;
 621                 forig->color_  = ffake->color_;
 622         } else {
 623                 lyxerr << "Can't fake font '" << orig << "' with '" << fake << "'\n";
 624         }
 625 }
 626
 627
 628 void augmentFont(LyXFont & font, string const & name)
 629 {
 630         static bool initialized = false;
 631         if (!initialized) {
 632                 initialized = true;
 633
 634                 // fake fonts if necessary
 635                 if (!fontloader.available(getFont("mathfrak")))
 636                         fakeFont("mathfrak", "lyxfakefrak");
 637                 if (!fontloader.available(getFont("mathcal")))
 638                         fakeFont("mathcal", "lyxfakecal");
 639         }
 640         fontinfo * info = searchFont(name);
 641         if (info->family_ != inh_family)
 642                 font.setFamily(info->family_);
 643         if (info->series_ != inh_series)
 644                 font.setSeries(info->series_);
 645         if (info->shape_ != inh_shape)
 646                 font.setShape(info->shape_);
 647         if (info->color_ != LColor::none)
 648                 font.setColor(info->color_);
 649 }