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
 134
 135 namespace {
 136
 137 // helper function: draw text and update x.
 138 void drawChar(PainterInfo & pi, int & x, int const y, char_type ch)
 139 {
 140         FontInfo font = pi.base.font;
 141         font.setPaintColor(pi.textColor(font.realColor()));
 142         pi.pain.text(x, y, ch, font);
 143         x += theFontMetrics(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 void InsetSpecialChar::write(ostream & os) const
 289 {
 290         string command;
 291         switch (kind_) {
 292         case HYPHENATION:
 293                 command = "softhyphen";
 294                 break;
 295         case LIGATURE_BREAK:
 296                 command = "ligaturebreak";
 297                 break;
 298         case END_OF_SENTENCE:
 299                 command = "endofsentence";
 300                 break;
 301         case LDOTS:
 302                 command = "ldots";
 303                 break;
 304         case MENU_SEPARATOR:
 305                 command = "menuseparator";
 306                 break;
 307         case SLASH:
 308                 command = "breakableslash";
 309                 break;
 310         case NOBREAKDASH:
 311                 command = "nobreakdash";
 312                 break;
 313         case PHRASE_LYX:
 314                 command = "LyX";
 315                 break;
 316         case PHRASE_TEX:
 317                 command = "TeX";
 318                 break;
 319         case PHRASE_LATEX2E:
 320                 command = "LaTeX2e";
 321                 break;
 322         case PHRASE_LATEX:
 323                 command = "LaTeX";
 324                 break;
 325         }
 326         os << "\\SpecialChar " << command << "\n";
 327 }
 328
 329
 330 void InsetSpecialChar::read(Lexer & lex)
 331 {
 332         lex.next();
 333         string const command = lex.getString();
 334
 335         if (command == "softhyphen")
 336                 kind_ = HYPHENATION;
 337         else if (command == "ligaturebreak")
 338                 kind_ = LIGATURE_BREAK;
 339         else if (command == "endofsentence")
 340                 kind_ = END_OF_SENTENCE;
 341         else if (command == "ldots")
 342                 kind_ = LDOTS;
 343         else if (command == "menuseparator")
 344                 kind_ = MENU_SEPARATOR;
 345         else if (command == "breakableslash")
 346                 kind_ = SLASH;
 347         else if (command == "nobreakdash")
 348                 kind_ = NOBREAKDASH;
 349         else if (command == "LyX")
 350                 kind_ = PHRASE_LYX;
 351         else if (command == "TeX")
 352                 kind_ = PHRASE_TEX;
 353         else if (command == "LaTeX2e")
 354                 kind_ = PHRASE_LATEX2E;
 355         else if (command == "LaTeX")
 356                 kind_ = PHRASE_LATEX;
 357         else
 358                 lex.printError("InsetSpecialChar: Unknown kind: `$$Token'");
 359 }
 360
 361
 362 void InsetSpecialChar::latex(otexstream & os,
 363                              OutputParams const & rp) const
 364 {
 365         switch (kind_) {
 366         case HYPHENATION:
 367                 os << "\\-";
 368                 break;
 369         case LIGATURE_BREAK:
 370                 os << "\\textcompwordmark" << termcmd;
 371                 break;
 372         case END_OF_SENTENCE:
 373                 os << "\\@.";
 374                 break;
 375         case LDOTS:
 376                 os << "\\ldots" << termcmd;
 377                 break;
 378         case MENU_SEPARATOR:
 379                 if (rp.local_font->isRightToLeft())
 380                         os << "\\lyxarrow*";
 381                 else
 382                         os << "\\lyxarrow";
 383                 os << termcmd;
 384                 break;
 385         case SLASH:
 386                 os << "\\slash" << termcmd;
 387                 break;
 388         case NOBREAKDASH:
 389                 if (rp.moving_arg)
 390                         os << "\\protect";
 391                 os << "\\nobreakdash-";
 392                 break;
 393         case PHRASE_LYX:
 394                 if (rp.moving_arg)
 395                         os << "\\protect";
 396                 os << "\\LyX" << termcmd;
 397                 break;
 398         case PHRASE_TEX:
 399                 if (rp.moving_arg)
 400                         os << "\\protect";
 401                 os << "\\TeX" << termcmd;
 402                 break;
 403         case PHRASE_LATEX2E:
 404                 if (rp.moving_arg)
 405                         os << "\\protect";
 406                 os << "\\LaTeXe" << termcmd;
 407                 break;
 408         case PHRASE_LATEX:
 409                 if (rp.moving_arg)
 410                         os << "\\protect";
 411                 os << "\\LaTeX" << termcmd;
 412                 break;
 413         }
 414 }
 415
 416
 417 int InsetSpecialChar::plaintext(odocstringstream & os,
 418         OutputParams const &, size_t) const
 419 {
 420         switch (kind_) {
 421         case HYPHENATION:
 422                 return 0;
 423         case LIGATURE_BREAK:
 424                 os.put(0x200c);
 425                 return 1;
 426         case END_OF_SENTENCE:
 427                 os << '.';
 428                 return 1;
 429         case LDOTS:
 430                 os.put(0x2026);
 431                 return 1;
 432         case MENU_SEPARATOR:
 433                 os << "->";
 434                 return 2;
 435         case SLASH:
 436                 os << '/';
 437                 return 1;
 438         case NOBREAKDASH:
 439                 os.put(0x2011);
 440                 return 1;
 441         case PHRASE_LYX:
 442                 os << "LyX";
 443                 return 3;
 444         case PHRASE_TEX:
 445                 os << "TeX";
 446                 return 3;
 447         case PHRASE_LATEX2E:
 448                 os << "LaTeX2";
 449                 os.put(0x03b5);
 450                 return 7;
 451         case PHRASE_LATEX:
 452                 os << "LaTeX";
 453                 return 5;
 454         }
 455         return 0;
 456 }
 457
 458
 459 int InsetSpecialChar::docbook(odocstream & os, OutputParams const &) const
 460 {
 461         switch (kind_) {
 462         case HYPHENATION:
 463         case LIGATURE_BREAK:
 464                 break;
 465         case END_OF_SENTENCE:
 466                 os << '.';
 467                 break;
 468         case LDOTS:
 469                 os << "&hellip;";
 470                 break;
 471         case MENU_SEPARATOR:
 472                 os << "&lyxarrow;";
 473                 break;
 474         case SLASH:
 475                 os << '/';
 476                 break;
 477         case NOBREAKDASH:
 478                 os << '-';
 479                 break;
 480         case PHRASE_LYX:
 481                 os << "LyX";
 482                 break;
 483         case PHRASE_TEX:
 484                 os << "TeX";
 485                 break;
 486         case PHRASE_LATEX2E:
 487                 os << "LaTeX2";
 488                 os.put(0x03b5);
 489                 break;
 490         case PHRASE_LATEX:
 491                 os << "LaTeX";
 492                 break;
 493         }
 494         return 0;
 495 }
 496
 497
 498 docstring InsetSpecialChar::xhtml(XHTMLStream & xs, OutputParams const &) const
 499 {
 500         switch (kind_) {
 501         case HYPHENATION:
 502                 break;
 503         case LIGATURE_BREAK:
 504                 xs << XHTMLStream::ESCAPE_NONE << "&#8204;";
 505                 break;
 506         case END_OF_SENTENCE:
 507                 xs << '.';
 508                 break;
 509         case LDOTS:
 510                 xs << XHTMLStream::ESCAPE_NONE << "&hellip;";
 511                 break;
 512         case MENU_SEPARATOR:
 513                 xs << XHTMLStream::ESCAPE_NONE << "&rArr;";
 514                 break;
 515         case SLASH:
 516                 xs << XHTMLStream::ESCAPE_NONE << "&frasl;";
 517                 break;
 518         case NOBREAKDASH:
 519                 xs << XHTMLStream::ESCAPE_NONE << "&#8209;";
 520                 break;
 521         case PHRASE_LYX:
 522                 xs << "LyX";
 523                 break;
 524         case PHRASE_TEX:
 525                 xs << "TeX";
 526                 break;
 527         case PHRASE_LATEX2E:
 528                 xs << "LaTeX2" << XHTMLStream::ESCAPE_NONE << "&#x3b5;";
 529                 break;
 530         case PHRASE_LATEX:
 531                 xs << "LaTeX";
 532                 break;
 533         }
 534         return docstring();
 535 }
 536
 537
 538 void InsetSpecialChar::toString(odocstream & os) const
 539 {
 540         switch (kind_) {
 541         case LIGATURE_BREAK:
 542                 // Do not output ZERO WIDTH NON JOINER here
 543                 // Spell checker would choke on it.
 544                 return;
 545         default:
 546                 break;
 547         }
 548         odocstringstream ods;
 549         plaintext(ods, OutputParams(0));
 550         os << ods.str();
 551 }
 552
 553
 554 void InsetSpecialChar::forOutliner(docstring & os, size_t const,
 555                                                                    bool const) const
 556 {
 557         odocstringstream ods;
 558         plaintext(ods, OutputParams(0));
 559         os += ods.str();
 560 }
 561
 562
 563 void InsetSpecialChar::validate(LaTeXFeatures & features) const
 564 {
 565         if (kind_ == MENU_SEPARATOR)
 566                 features.require("lyxarrow");
 567         if (kind_ == NOBREAKDASH)
 568                 features.require("amsmath");
 569         if (kind_ == PHRASE_LYX)
 570                 features.require("LyX");
 571 }
 572
 573
 574 bool InsetSpecialChar::isChar() const
 575 {
 576         return kind_ != HYPHENATION || kind_ != LIGATURE_BREAK;
 577 }
 578
 579
 580 bool InsetSpecialChar::isLetter() const
 581 {
 582         return kind_ == HYPHENATION || kind_ == LIGATURE_BREAK
 583                 || kind_ == NOBREAKDASH;
 584 }
 585
 586
 587 bool InsetSpecialChar::isLineSeparator() const
 588 {
 589 #if 0
 590         // this would be nice, but it does not work, since
 591         // Paragraph::stripLeadingSpaces nukes the characters which
 592         // have this property. I leave the code here, since it should
 593         // eventually be made to work. (JMarc 20020327)
 594         return kind_ == HYPHENATION || kind_ == MENU_SEPARATOR
 595                 || kind_ == SLASH;
 596 #else
 597         return false;
 598 #endif
 599 }
 600
 601
 602 } // namespace lyx