src/insets/InsetSpecialChar.cpp

   1 /**
   2  * \file InsetSpecialChar.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup Nielsen
   7  * \author Jean-Marc Lasgouttes
   8  * \author Lars Gullik Bjønnes
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  */
  12
  13 #include <config.h>
  14
  15 #include "InsetSpecialChar.h"
  16
  17 #include "Dimension.h"
  18 #include "Font.h"
  19 #include "LaTeXFeatures.h"
  20 #include "Lexer.h"
  21 #include "MetricsInfo.h"
  22 #include "output_xhtml.h"
  23 #include "texstream.h"
  24
  25 #include "frontends/FontMetrics.h"
  26 #include "frontends/Painter.h"
  27
  28 #include "support/debug.h"
  29 #include "support/docstream.h"
  30
  31 using namespace std;
  32
  33 namespace lyx {
  34
  35
  36 InsetSpecialChar::InsetSpecialChar(Kind k)
  37         : Inset(0), kind_(k)
  38 {}
  39
  40
  41 InsetSpecialChar::Kind InsetSpecialChar::kind() const
  42 {
  43         return kind_;
  44 }
  45
  46
  47 namespace {
  48
  49 int logoWidth(FontInfo const & font, InsetSpecialChar::Kind kind) {
  50         frontend::FontMetrics const & fm = theFontMetrics(font);
  51         int const em = fm.em();
  52         int width = 0;
  53         // See drawlogo() below to understand what this does.
  54         switch (kind) {
  55         case InsetSpecialChar::PHRASE_LYX:
  56                 width = fm.width(from_ascii("L")) - em / 6
  57                         + fm.width(from_ascii("Y")) - em / 8
  58                         + fm.width(from_ascii("X"));
  59                 break;
  60
  61         case InsetSpecialChar::PHRASE_TEX:
  62                 width = fm.width(from_ascii("T")) - em / 6
  63                         + fm.width(from_ascii("E")) - em / 8
  64                         + fm.width(from_ascii("X"));
  65                 break;
  66
  67         case InsetSpecialChar::PHRASE_LATEX2E:
  68                 width = logoWidth(font, InsetSpecialChar::PHRASE_LATEX)
  69                         + 3 * em / 20
  70                         + fm.width(from_ascii("2") + char_type(0x03b5));
  71                 break;
  72         case InsetSpecialChar::PHRASE_LATEX: {
  73                 FontInfo smaller = font;
  74                 smaller.decSize().decSize();
  75                 width = fm.width(from_ascii("L")) - 9 * em / 25
  76                         + theFontMetrics(smaller).width(from_ascii("A")) - 3 * em / 20
  77                         + logoWidth(font, InsetSpecialChar::PHRASE_TEX);
  78                 break;
  79         }
  80         default:
  81                 LYXERR0("No information for computing width of logo " << kind);
  82         }
  83
  84         return width;
  85 }
  86
  87 }
  88
  89
  90 void InsetSpecialChar::metrics(MetricsInfo & mi, Dimension & dim) const
  91 {
  92         frontend::FontMetrics const & fm =
  93                 theFontMetrics(mi.base.font);
  94         dim.asc = fm.maxAscent();
  95         dim.des = fm.maxDescent();
  96         dim.wid = 0;
  97
  98         docstring s;
  99         switch (kind_) {
 100                 case LIGATURE_BREAK:
 101                         s = from_ascii("|");
 102                         break;
 103                 case END_OF_SENTENCE:
 104                         s = from_ascii(".");
 105                         break;
 106                 case LDOTS:
 107                         s = from_ascii(". . .");
 108                         break;
 109                 case MENU_SEPARATOR:
 110                         s = from_ascii(" x ");
 111                         break;
 112                 case HYPHENATION:
 113                         dim.wid = fm.width(from_ascii("-"));
 114                         if (dim.wid > 5)
 115                                 dim.wid -= 2; // to make it look shorter
 116                         break;
 117                 case SLASH:
 118                         s = from_ascii("/");
 119                         break;
 120                 case NOBREAKDASH:
 121                         s = from_ascii("-");
 122                         break;
 123                 case PHRASE_LYX:
 124                 case PHRASE_TEX:
 125                 case PHRASE_LATEX2E:
 126                 case PHRASE_LATEX:
 127                         dim.wid = logoWidth(mi.base.font, kind_);
 128                         break;
 129         }
 130         if (dim.wid == 0)
 131                 dim.wid = fm.width(s);
 132
 133         setDimCache(mi, dim);
 134 }
 135
 136
 137 namespace {
 138
 139 // helper function: draw text and update x.
 140 void drawChar(PainterInfo & pi, int & x, int const y, char_type ch)
 141 {
 142         pi.pain.text(x, y, ch, pi.base.font);
 143         x += theFontMetrics(pi.base.font).width(ch);
 144 }
 145
 146
 147 void drawLogo(PainterInfo & pi, int & x, int const y, InsetSpecialChar::Kind kind)
 148 {
 149         FontInfo const & font = pi.base.font;
 150         int const em = theFontMetrics(font).em();
 151         switch (kind) {
 152         case InsetSpecialChar::PHRASE_LYX:
 153                 /** Reference macro:
 154                  *  \providecommand{\LyX}{L\kern-.1667em\lower.25em\hbox{Y}\kern-.125emX\\@};
 155                  */
 156                 drawChar(pi, x, y, 'L');
 157                 x -= em / 6;
 158                 drawChar(pi, x, y + em / 4, 'Y');
 159                 x -= em / 8;
 160                 drawChar(pi, x, y, 'X');
 161                 break;
 162
 163         case InsetSpecialChar::PHRASE_TEX: {
 164                 /** Reference macro:
 165                  *  \def\TeX{T\kern-.1667em\lower.5ex\hbox{E}\kern-.125emX\@}
 166                  */
 167                 int const ex = theFontMetrics(font).ascent('x');
 168                 drawChar(pi, x, y, 'T');
 169                 x -= em / 6;
 170                 drawChar(pi, x, y + ex / 2, 'E');
 171                 x -= em / 8;
 172                 drawChar(pi, x, y, 'X');
 173                 break;
 174         }
 175         case InsetSpecialChar::PHRASE_LATEX2E:
 176                 /** Reference macro:
 177                  *  \DeclareRobustCommand{\LaTeXe}{\mbox{\m@th
 178                  *    \if b\expandafter\@car\f@series\@nil\boldmath\fi
 179                  *    \LaTeX\kern.15em2$_{\textstyle\varepsilon}$}}
 180                  */
 181                 drawLogo(pi, x, y, InsetSpecialChar::PHRASE_LATEX);
 182                 x += 3 * em / 20;
 183                 drawChar(pi, x, y, '2');
 184                 drawChar(pi, x, y + em / 4, char_type(0x03b5));
 185                 break;
 186
 187         case InsetSpecialChar::PHRASE_LATEX: {
 188                 /** Reference macro:
 189                  * \DeclareRobustCommand{\LaTeX}{L\kern-.36em%
 190                  *        {\sbox\z@ T%
 191                  *         \vbox to\ht\z@{\hbox{\check@mathfonts
 192                  *                              \fontsize\sf@size\z@
 193                  *                              \math@fontsfalse\selectfont
 194                  *                              A}%
 195                  *                        \vss}%
 196                  *        }%
 197                  *        \kern-.15em%
 198                  *        \TeX}
 199                  */
 200                 drawChar(pi, x, y, 'L');
 201                 x -= 9 * em / 25;
 202                 PainterInfo pi2 = pi;
 203                 pi2.base.font.decSize().decSize();
 204                 drawChar(pi2, x, y - em / 5, 'A');
 205                 x -= 3 * em / 20;
 206                 drawLogo(pi, x, y, InsetSpecialChar::PHRASE_TEX);
 207                 break;
 208         }
 209         default:
 210                 LYXERR0("No information for drawing logo " << kind);
 211         }
 212 }
 213
 214 }
 215
 216 void InsetSpecialChar::draw(PainterInfo & pi, int x, int y) const
 217 {
 218         FontInfo font = pi.base.font;
 219
 220         switch (kind_) {
 221         case HYPHENATION:
 222         {
 223                 font.setColor(Color_special);
 224                 pi.pain.text(x, y, char_type('-'), font);
 225                 break;
 226         }
 227         case LIGATURE_BREAK:
 228         {
 229                 font.setColor(Color_special);
 230                 pi.pain.text(x, y, char_type('|'), font);
 231                 break;
 232         }
 233         case END_OF_SENTENCE:
 234         {
 235                 font.setColor(Color_special);
 236                 pi.pain.text(x, y, char_type('.'), font);
 237                 break;
 238         }
 239         case LDOTS:
 240         {
 241                 font.setColor(Color_special);
 242                 string ell = ". . . ";
 243                 docstring dell(ell.begin(), ell.end());
 244                 pi.pain.text(x, y, dell, font);
 245                 break;
 246         }
 247         case MENU_SEPARATOR:
 248         {
 249                 frontend::FontMetrics const & fm =
 250                         theFontMetrics(font);
 251
 252                 // A triangle the width and height of an 'x'
 253                 int w = fm.width(char_type('x'));
 254                 int ox = fm.width(char_type(' ')) + x;
 255                 int h = fm.ascent(char_type('x'));
 256                 int xp[4], yp[4];
 257
 258                 xp[0] = ox;     yp[0] = y;
 259                 xp[1] = ox;     yp[1] = y - h;
 260                 xp[2] = ox + w; yp[2] = y - h/2;
 261                 xp[3] = ox;     yp[3] = y;
 262
 263                 pi.pain.lines(xp, yp, 4, Color_special);
 264                 break;
 265         }
 266         case SLASH:
 267         {
 268                 font.setColor(Color_special);
 269                 pi.pain.text(x, y, char_type('/'), font);
 270                 break;
 271         }
 272         case NOBREAKDASH:
 273         {
 274                 font.setColor(Color_latex);
 275                 pi.pain.text(x, y, char_type('-'), font);
 276                 break;
 277         }
 278         case PHRASE_LYX:
 279         case PHRASE_TEX:
 280         case PHRASE_LATEX2E:
 281         case PHRASE_LATEX:
 282                 drawLogo(pi, x, y, kind_);
 283                 break;
 284         }
 285 }
 286
 287
 288 // In lyxf3 this will be just LaTeX
 289 void InsetSpecialChar::write(ostream & os) const
 290 {
 291         string command;
 292         switch (kind_) {
 293         case HYPHENATION:
 294                 command = "softhyphen";
 295                 break;
 296         case LIGATURE_BREAK:
 297                 command = "ligaturebreak";
 298                 break;
 299         case END_OF_SENTENCE:
 300                 command = "endofsentence";
 301                 break;
 302         case LDOTS:
 303                 command = "ldots";
 304                 break;
 305         case MENU_SEPARATOR:
 306                 command = "menuseparator";
 307                 break;
 308         case SLASH:
 309                 command = "breakableslash";
 310                 break;
 311         case NOBREAKDASH:
 312                 command = "nobreakdash";
 313                 break;
 314         case PHRASE_LYX:
 315                 command = "LyX";
 316                 break;
 317         case PHRASE_TEX:
 318                 command = "TeX";
 319                 break;
 320         case PHRASE_LATEX2E:
 321                 command = "LaTeX2e";
 322                 break;
 323         case PHRASE_LATEX:
 324                 command = "LaTeX";
 325                 break;
 326         }
 327         os << "\\SpecialChar " << command << "\n";
 328 }
 329
 330
 331 // This function will not be necessary when lyx3
 332 void InsetSpecialChar::read(Lexer & lex)
 333 {
 334         lex.next();
 335         string const command = lex.getString();
 336
 337         if (command == "softhyphen")
 338                 kind_ = HYPHENATION;
 339         else if (command == "ligaturebreak")
 340                 kind_ = LIGATURE_BREAK;
 341         else if (command == "endofsentence")
 342                 kind_ = END_OF_SENTENCE;
 343         else if (command == "ldots")
 344                 kind_ = LDOTS;
 345         else if (command == "menuseparator")
 346                 kind_ = MENU_SEPARATOR;
 347         else if (command == "breakableslash")
 348                 kind_ = SLASH;
 349         else if (command == "nobreakdash")
 350                 kind_ = NOBREAKDASH;
 351         else if (command == "LyX")
 352                 kind_ = PHRASE_LYX;
 353         else if (command == "TeX")
 354                 kind_ = PHRASE_TEX;
 355         else if (command == "LaTeX2e")
 356                 kind_ = PHRASE_LATEX2E;
 357         else if (command == "LaTeX")
 358                 kind_ = PHRASE_LATEX;
 359         else
 360                 lex.printError("InsetSpecialChar: Unknown kind: `$$Token'");
 361 }
 362
 363
 364 void InsetSpecialChar::latex(otexstream & os,
 365                              OutputParams const & rp) const
 366 {
 367         switch (kind_) {
 368         case HYPHENATION:
 369                 os << "\\-";
 370                 break;
 371         case LIGATURE_BREAK:
 372                 os << "\\textcompwordmark{}";
 373                 break;
 374         case END_OF_SENTENCE:
 375                 os << "\\@.";
 376                 break;
 377         case LDOTS:
 378                 os << "\\ldots{}";
 379                 break;
 380         case MENU_SEPARATOR:
 381                 if (rp.local_font->isRightToLeft())
 382                         os << "\\lyxarrow*{}";
 383                 else
 384                         os << "\\lyxarrow{}";
 385                 break;
 386         case SLASH:
 387                 os << "\\slash{}";
 388                 break;
 389         case NOBREAKDASH:
 390                 if (rp.moving_arg)
 391                         os << "\\protect";
 392                 os << "\\nobreakdash-";
 393                 break;
 394         case PHRASE_LYX:
 395                 if (rp.moving_arg)
 396                         os << "\\protect";
 397                 os << "\\LyX{}";
 398                 break;
 399         case PHRASE_TEX:
 400                 if (rp.moving_arg)
 401                         os << "\\protect";
 402                 os << "\\TeX{}";
 403                 break;
 404         case PHRASE_LATEX2E:
 405                 if (rp.moving_arg)
 406                         os << "\\protect";
 407                 os << "\\LaTeXe{}";
 408                 break;
 409         case PHRASE_LATEX:
 410                 if (rp.moving_arg)
 411                         os << "\\protect";
 412                 os << "\\LaTeX{}";
 413                 break;
 414         }
 415 }
 416
 417
 418 int InsetSpecialChar::plaintext(odocstringstream & os,
 419         OutputParams const &, size_t) const
 420 {
 421         switch (kind_) {
 422         case HYPHENATION:
 423                 return 0;
 424         case LIGATURE_BREAK:
 425                 os.put(0x200c);
 426                 return 1;
 427         case END_OF_SENTENCE:
 428                 os << '.';
 429                 return 1;
 430         case LDOTS:
 431                 os.put(0x2026);
 432                 return 1;
 433         case MENU_SEPARATOR:
 434                 os << "->";
 435                 return 2;
 436         case SLASH:
 437                 os << '/';
 438                 return 1;
 439         case NOBREAKDASH:
 440                 os.put(0x2011);
 441                 return 1;
 442         case PHRASE_LYX:
 443                 os << "LyX";
 444                 return 3;
 445         case PHRASE_TEX:
 446                 os << "TeX";
 447                 return 3;
 448         case PHRASE_LATEX2E:
 449                 os << "LaTeX2";
 450                 os.put(0x03b5);
 451                 return 7;
 452         case PHRASE_LATEX:
 453                 os << "LaTeX";
 454                 return 5;
 455         }
 456         return 0;
 457 }
 458
 459
 460 int InsetSpecialChar::docbook(odocstream & os, OutputParams const &) const
 461 {
 462         switch (kind_) {
 463         case HYPHENATION:
 464         case LIGATURE_BREAK:
 465                 break;
 466         case END_OF_SENTENCE:
 467                 os << '.';
 468                 break;
 469         case LDOTS:
 470                 os << "&hellip;";
 471                 break;
 472         case MENU_SEPARATOR:
 473                 os << "&lyxarrow;";
 474                 break;
 475         case SLASH:
 476                 os << '/';
 477                 break;
 478         case NOBREAKDASH:
 479                 os << '-';
 480                 break;
 481         case PHRASE_LYX:
 482                 os << "LyX";
 483                 break;
 484         case PHRASE_TEX:
 485                 os << "TeX";
 486                 break;
 487         case PHRASE_LATEX2E:
 488                 os << "LaTeX2";
 489                 os.put(0x03b5);
 490                 break;
 491         case PHRASE_LATEX:
 492                 os << "LaTeX";
 493                 break;
 494         }
 495         return 0;
 496 }
 497
 498
 499 docstring InsetSpecialChar::xhtml(XHTMLStream & xs, OutputParams const &) const
 500 {
 501         switch (kind_) {
 502         case HYPHENATION:
 503                 break;
 504         case LIGATURE_BREAK:
 505                 xs << XHTMLStream::ESCAPE_NONE << "&#8204;";
 506                 break;
 507         case END_OF_SENTENCE:
 508                 xs << '.';
 509                 break;
 510         case LDOTS:
 511                 xs << XHTMLStream::ESCAPE_NONE << "&hellip;";
 512                 break;
 513         case MENU_SEPARATOR:
 514                 xs << XHTMLStream::ESCAPE_NONE << "&rArr;";
 515                 break;
 516         case SLASH:
 517                 xs << XHTMLStream::ESCAPE_NONE << "&frasl;";
 518                 break;
 519         case NOBREAKDASH:
 520                 xs << XHTMLStream::ESCAPE_NONE << "&#8209;";
 521                 break;
 522         case PHRASE_LYX:
 523                 xs << "LyX";
 524                 break;
 525         case PHRASE_TEX:
 526                 xs << "TeX";
 527                 break;
 528         case PHRASE_LATEX2E:
 529                 xs << "LaTeX2" << XHTMLStream::ESCAPE_NONE << "&#x3b5;";
 530                 break;
 531         case PHRASE_LATEX:
 532                 xs << "LaTeX";
 533                 break;
 534         }
 535         return docstring();
 536 }
 537
 538
 539 void InsetSpecialChar::toString(odocstream & os) const
 540 {
 541         switch (kind_) {
 542         case LIGATURE_BREAK:
 543                 // Do not output ZERO WIDTH NON JOINER here
 544                 // Spell checker would choke on it.
 545                 return;
 546         default:
 547                 break;
 548         }
 549         odocstringstream ods;
 550         plaintext(ods, OutputParams(0));
 551         os << ods.str();
 552 }
 553
 554
 555 void InsetSpecialChar::forOutliner(docstring & os, size_t const,
 556                                                                    bool const) const
 557 {
 558         odocstringstream ods;
 559         plaintext(ods, OutputParams(0));
 560         os += ods.str();
 561 }
 562
 563
 564 void InsetSpecialChar::validate(LaTeXFeatures & features) const
 565 {
 566         if (kind_ == MENU_SEPARATOR)
 567                 features.require("lyxarrow");
 568         if (kind_ == NOBREAKDASH)
 569                 features.require("amsmath");
 570         if (kind_ == PHRASE_LYX)
 571                 features.require("LyX");
 572 }
 573
 574
 575 bool InsetSpecialChar::isLetter() const
 576 {
 577         return kind_ == HYPHENATION || kind_ == LIGATURE_BREAK
 578                 || kind_ == NOBREAKDASH;
 579 }
 580
 581
 582 bool InsetSpecialChar::isLineSeparator() const
 583 {
 584 #if 0
 585         // this would be nice, but it does not work, since
 586         // Paragraph::stripLeadingSpaces nukes the characters which
 587         // have this property. I leave the code here, since it should
 588         // eventually be made to work. (JMarc 20020327)
 589         return kind_ == HYPHENATION || kind_ == MENU_SEPARATOR
 590                 || kind_ == SLASH;
 591 #else
 592         return false;
 593 #endif
 594 }
 595
 596
 597 } // namespace lyx