src/Text.cpp

   1 /**
   2  * \file src/text.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
   7  * \author Lars Gullik Bjønnes
   8  * \author Dov Feldstern
   9  * \author Jean-Marc Lasgouttes
  10  * \author John Levon
  11  * \author André Pönitz
  12  * \author Stefan Schimanski
  13  * \author Dekel Tsur
  14  * \author Jürgen Vigna
  15  *
  16  * Full author contact details are available in file CREDITS.
  17  */
  18
  19 #include <config.h>
  20
  21 #include "Text.h"
  22
  23 #include "Author.h"
  24 #include "Buffer.h"
  25 #include "buffer_funcs.h"
  26 #include "BufferParams.h"
  27 #include "BufferView.h"
  28 #include "Changes.h"
  29 #include "Cursor.h"
  30 #include "ParIterator.h"
  31 #include "CutAndPaste.h"
  32 #include "debug.h"
  33 #include "DispatchResult.h"
  34 #include "Encoding.h"
  35 #include "ErrorList.h"
  36 #include "FuncRequest.h"
  37 #include "factory.h"
  38 #include "FontIterator.h"
  39 #include "gettext.h"
  40 #include "Language.h"
  41 #include "Color.h"
  42 #include "Length.h"
  43 #include "Lexer.h"
  44 #include "LyXRC.h"
  45 #include "Paragraph.h"
  46 #include "paragraph_funcs.h"
  47 #include "ParagraphParameters.h"
  48 #include "TextMetrics.h"
  49 #include "VSpace.h"
  50 #include "WordLangTuple.h"
  51
  52 #include "frontends/FontMetrics.h"
  53 #include "frontends/Painter.h"
  54
  55 #include "insets/InsetText.h"
  56 #include "insets/InsetBibitem.h"
  57 #include "insets/InsetCaption.h"
  58 #include "insets/InsetHFill.h"
  59 #include "insets/InsetLine.h"
  60 #include "insets/InsetNewline.h"
  61 #include "insets/InsetPagebreak.h"
  62 #include "insets/InsetOptArg.h"
  63 #include "insets/InsetSpace.h"
  64 #include "insets/InsetSpecialChar.h"
  65 #include "insets/InsetTabular.h"
  66
  67 #include "support/lstrings.h"
  68 #include "support/textutils.h"
  69 #include "support/convert.h"
  70
  71 #include <boost/current_function.hpp>
  72 #include <boost/next_prior.hpp>
  73
  74 #include <sstream>
  75
  76 using std::auto_ptr;
  77 using std::advance;
  78 using std::distance;
  79 using std::max;
  80 using std::min;
  81 using std::endl;
  82 using std::string;
  83
  84 namespace lyx {
  85
  86 using support::bformat;
  87 using support::contains;
  88 using support::split;
  89
  90 using cap::cutSelection;
  91 using cap::pasteParagraphList;
  92
  93 using frontend::FontMetrics;
  94
  95 namespace {
  96
  97 void readParToken(Buffer const & buf, Paragraph & par, Lexer & lex,
  98         string const & token, Font & font, Change & change, ErrorList & errorList)
  99 {
 100         BufferParams const & bp = buf.params();
 101
 102         if (token[0] != '\\') {
 103                 docstring dstr = lex.getDocString();
 104                 par.appendString(dstr, font, change);
 105
 106         } else if (token == "\\begin_layout") {
 107                 lex.eatLine();
 108                 docstring layoutname = lex.getDocString();
 109
 110                 font = Font(Font::ALL_INHERIT, bp.language);
 111                 change = Change(Change::UNCHANGED);
 112
 113                 TextClass const & tclass = bp.getTextClass();
 114
 115                 if (layoutname.empty()) {
 116                         layoutname = tclass.defaultLayoutName();
 117                 }
 118
 119                 bool hasLayout = tclass.hasLayout(layoutname);
 120
 121                 if (!hasLayout) {
 122                         errorList.push_back(ErrorItem(_("Unknown layout"),
 123                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 124                         layoutname, from_utf8(tclass.name())), par.id(), 0, par.size()));
 125                         layoutname = tclass.defaultLayoutName();
 126                 }
 127
 128                 par.layout(bp.getTextClass()[layoutname]);
 129
 130                 // Test whether the layout is obsolete.
 131                 LayoutPtr const & layout = par.layout();
 132                 if (!layout->obsoleted_by().empty())
 133                         par.layout(bp.getTextClass()[layout->obsoleted_by()]);
 134
 135                 par.params().read(lex);
 136
 137         } else if (token == "\\end_layout") {
 138                 lyxerr << BOOST_CURRENT_FUNCTION
 139                        << ": Solitary \\end_layout in line "
 140                        << lex.getLineNo() << "\n"
 141                        << "Missing \\begin_layout?.\n";
 142         } else if (token == "\\end_inset") {
 143                 lyxerr << BOOST_CURRENT_FUNCTION
 144                        << ": Solitary \\end_inset in line "
 145                        << lex.getLineNo() << "\n"
 146                        << "Missing \\begin_inset?.\n";
 147         } else if (token == "\\begin_inset") {
 148                 Inset * inset = readInset(lex, buf);
 149                 if (inset)
 150                         par.insertInset(par.size(), inset, font, change);
 151                 else {
 152                         lex.eatLine();
 153                         docstring line = lex.getDocString();
 154                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 155                                             par.id(), 0, par.size()));
 156                 }
 157         } else if (token == "\\family") {
 158                 lex.next();
 159                 font.setLyXFamily(lex.getString());
 160         } else if (token == "\\series") {
 161                 lex.next();
 162                 font.setLyXSeries(lex.getString());
 163         } else if (token == "\\shape") {
 164                 lex.next();
 165                 font.setLyXShape(lex.getString());
 166         } else if (token == "\\size") {
 167                 lex.next();
 168                 font.setLyXSize(lex.getString());
 169         } else if (token == "\\lang") {
 170                 lex.next();
 171                 string const tok = lex.getString();
 172                 Language const * lang = languages.getLanguage(tok);
 173                 if (lang) {
 174                         font.setLanguage(lang);
 175                 } else {
 176                         font.setLanguage(bp.language);
 177                         lex.printError("Unknown language `$$Token'");
 178                 }
 179         } else if (token == "\\numeric") {
 180                 lex.next();
 181                 font.setNumber(font.setLyXMisc(lex.getString()));
 182         } else if (token == "\\emph") {
 183                 lex.next();
 184                 font.setEmph(font.setLyXMisc(lex.getString()));
 185         } else if (token == "\\bar") {
 186                 lex.next();
 187                 string const tok = lex.getString();
 188
 189                 if (tok == "under")
 190                         font.setUnderbar(Font::ON);
 191                 else if (tok == "no")
 192                         font.setUnderbar(Font::OFF);
 193                 else if (tok == "default")
 194                         font.setUnderbar(Font::INHERIT);
 195                 else
 196                         lex.printError("Unknown bar font flag "
 197                                        "`$$Token'");
 198         } else if (token == "\\noun") {
 199                 lex.next();
 200                 font.setNoun(font.setLyXMisc(lex.getString()));
 201         } else if (token == "\\color") {
 202                 lex.next();
 203                 font.setLyXColor(lex.getString());
 204         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 205
 206                 // Insets don't make sense in a free-spacing context! ---Kayvan
 207                 if (par.isFreeSpacing()) {
 208                         if (token == "\\InsetSpace")
 209                                 par.appendChar(' ', font, change);
 210                         else if (lex.isOK()) {
 211                                 lex.next();
 212                                 string const next_token = lex.getString();
 213                                 if (next_token == "\\-")
 214                                         par.appendChar('-', font, change);
 215                                 else {
 216                                         lex.printError("Token `$$Token' "
 217                                                        "is in free space "
 218                                                        "paragraph layout!");
 219                                 }
 220                         }
 221                 } else {
 222                         auto_ptr<Inset> inset;
 223                         if (token == "\\SpecialChar" )
 224                                 inset.reset(new InsetSpecialChar);
 225                         else
 226                                 inset.reset(new InsetSpace);
 227                         inset->read(buf, lex);
 228                         par.insertInset(par.size(), inset.release(),
 229                                         font, change);
 230                 }
 231         } else if (token == "\\backslash") {
 232                 par.appendChar('\\', font, change);
 233         } else if (token == "\\newline") {
 234                 auto_ptr<Inset> inset(new InsetNewline);
 235                 inset->read(buf, lex);
 236                 par.insertInset(par.size(), inset.release(), font, change);
 237         } else if (token == "\\LyXTable") {
 238                 auto_ptr<Inset> inset(new InsetTabular(buf));
 239                 inset->read(buf, lex);
 240                 par.insertInset(par.size(), inset.release(), font, change);
 241         } else if (token == "\\hfill") {
 242                 par.insertInset(par.size(), new InsetHFill, font, change);
 243         } else if (token == "\\lyxline") {
 244                 par.insertInset(par.size(), new InsetLine, font, change);
 245         } else if (token == "\\newpage") {
 246                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 247         } else if (token == "\\clearpage") {
 248                 par.insertInset(par.size(), new InsetClearPage, font, change);
 249         } else if (token == "\\cleardoublepage") {
 250                 par.insertInset(par.size(), new InsetClearDoublePage, font, change);
 251         } else if (token == "\\change_unchanged") {
 252                 change = Change(Change::UNCHANGED);
 253         } else if (token == "\\change_inserted") {
 254                 lex.eatLine();
 255                 std::istringstream is(lex.getString());
 256                 unsigned int aid;
 257                 time_type ct;
 258                 is >> aid >> ct;
 259                 if (aid >= bp.author_map.size()) {
 260                         errorList.push_back(ErrorItem(_("Change tracking error"),
 261                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 262                                             par.id(), 0, par.size()));
 263                         change = Change(Change::UNCHANGED);
 264                 } else
 265                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 266         } else if (token == "\\change_deleted") {
 267                 lex.eatLine();
 268                 std::istringstream is(lex.getString());
 269                 unsigned int aid;
 270                 time_type ct;
 271                 is >> aid >> ct;
 272                 if (aid >= bp.author_map.size()) {
 273                         errorList.push_back(ErrorItem(_("Change tracking error"),
 274                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 275                                             par.id(), 0, par.size()));
 276                         change = Change(Change::UNCHANGED);
 277                 } else
 278                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 279         } else {
 280                 lex.eatLine();
 281                 errorList.push_back(ErrorItem(_("Unknown token"),
 282                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 283                         lex.getDocString()),
 284                         par.id(), 0, par.size()));
 285         }
 286 }
 287
 288
 289 void readParagraph(Buffer const & buf, Paragraph & par, Lexer & lex,
 290         ErrorList & errorList)
 291 {
 292         lex.nextToken();
 293         string token = lex.getString();
 294         Font font;
 295         Change change(Change::UNCHANGED);
 296
 297         while (lex.isOK()) {
 298                 readParToken(buf, par, lex, token, font, change, errorList);
 299
 300                 lex.nextToken();
 301                 token = lex.getString();
 302
 303                 if (token.empty())
 304                         continue;
 305
 306                 if (token == "\\end_layout") {
 307                         //Ok, paragraph finished
 308                         break;
 309                 }
 310
 311                 LYXERR(Debug::PARSER) << "Handling paragraph token: `"
 312                                       << token << '\'' << endl;
 313                 if (token == "\\begin_layout" || token == "\\end_document"
 314                     || token == "\\end_inset" || token == "\\begin_deeper"
 315                     || token == "\\end_deeper") {
 316                         lex.pushToken(token);
 317                         lyxerr << "Paragraph ended in line "
 318                                << lex.getLineNo() << "\n"
 319                                << "Missing \\end_layout.\n";
 320                         break;
 321                 }
 322         }
 323         // Final change goes to paragraph break:
 324         par.setChange(par.size(), change);
 325
 326         // Initialize begin_of_body_ on load; redoParagraph maintains
 327         par.setBeginOfBody();
 328 }
 329
 330
 331 } // namespace anon
 332
 333
 334 bool Text::empty() const
 335 {
 336         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 337                 // FIXME: Should we consider the labeled type as empty too?
 338                 && pars_[0].layout()->labeltype == LABEL_NO_LABEL);
 339 }
 340
 341
 342 double Text::spacing(Buffer const & buffer,
 343                 Paragraph const & par) const
 344 {
 345         if (par.params().spacing().isDefault())
 346                 return buffer.params().spacing().getValue();
 347         return par.params().spacing().getValue();
 348 }
 349
 350
 351 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 352 {
 353         BOOST_ASSERT(this == cur.text());
 354
 355         Paragraph & cpar = cur.paragraph();
 356         pit_type cpit = cur.pit();
 357
 358         TextClass const & tclass = cur.buffer().params().getTextClass();
 359         LayoutPtr const & layout = cpar.layout();
 360
 361         // this is only allowed, if the current paragraph is not empty
 362         // or caption and if it has not the keepempty flag active
 363         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 364             layout->labeltype != LABEL_SENSITIVE)
 365                 return;
 366
 367         // a layout change may affect also the following paragraph
 368         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 369
 370         // Always break behind a space
 371         // It is better to erase the space (Dekel)
 372         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 373                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
 374
 375         // What should the layout for the new paragraph be?
 376         bool keep_layout = inverse_logic ?
 377                 !layout->isEnvironment()
 378                 : layout->isEnvironment();
 379
 380         // We need to remember this before we break the paragraph, because
 381         // that invalidates the layout variable
 382         bool sensitive = layout->labeltype == LABEL_SENSITIVE;
 383
 384         // we need to set this before we insert the paragraph.
 385         bool const isempty = cpar.allowEmpty() && cpar.empty();
 386
 387         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
 388                          cur.pos(), keep_layout);
 389
 390         // After this, neither paragraph contains any rows!
 391
 392         cpit = cur.pit();
 393         pit_type next_par = cpit + 1;
 394
 395         // well this is the caption hack since one caption is really enough
 396         if (sensitive) {
 397                 if (cur.pos() == 0)
 398                         // set to standard-layout
 399                         pars_[cpit].applyLayout(tclass.defaultLayout());
 400                 else
 401                         // set to standard-layout
 402                         pars_[next_par].applyLayout(tclass.defaultLayout());
 403         }
 404
 405         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 406                 if (!pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges))
 407                         break; // the character couldn't be deleted physically due to change tracking
 408         }
 409
 410         updateLabels(cur.buffer());
 411
 412         // A singlePar update is not enough in this case.
 413         cur.updateFlags(Update::Force);
 414
 415         // This check is necessary. Otherwise the new empty paragraph will
 416         // be deleted automatically. And it is more friendly for the user!
 417         if (cur.pos() != 0 || isempty)
 418                 setCursor(cur, cur.pit() + 1, 0);
 419         else
 420                 setCursor(cur, cur.pit(), 0);
 421 }
 422
 423
 424 // insert a character, moves all the following breaks in the
 425 // same Paragraph one to the right and make a rebreak
 426 void Text::insertChar(Cursor & cur, char_type c)
 427 {
 428         BOOST_ASSERT(this == cur.text());
 429
 430         cur.recordUndo(INSERT_UNDO);
 431
 432         TextMetrics const & tm = cur.bv().textMetrics(this);
 433         Buffer const & buffer = cur.buffer();
 434         Paragraph & par = cur.paragraph();
 435         // try to remove this
 436         pit_type const pit = cur.pit();
 437
 438         bool const freeSpacing = par.layout()->free_spacing ||
 439                 par.isFreeSpacing();
 440
 441         if (lyxrc.auto_number) {
 442                 static docstring const number_operators = from_ascii("+-/*");
 443                 static docstring const number_unary_operators = from_ascii("+-");
 444                 static docstring const number_seperators = from_ascii(".,:");
 445
 446                 if (cur.current_font.number() == Font::ON) {
 447                         if (!isDigit(c) && !contains(number_operators, c) &&
 448                             !(contains(number_seperators, c) &&
 449                               cur.pos() != 0 &&
 450                               cur.pos() != cur.lastpos() &&
 451                               tm.getDisplayFont(pit, cur.pos()).number() == Font::ON &&
 452                               tm.getDisplayFont(pit, cur.pos() - 1).number() == Font::ON)
 453                            )
 454                                 number(cur); // Set current_font.number to OFF
 455                 } else if (isDigit(c) &&
 456                            cur.real_current_font.isVisibleRightToLeft()) {
 457                         number(cur); // Set current_font.number to ON
 458
 459                         if (cur.pos() != 0) {
 460                                 char_type const c = par.getChar(cur.pos() - 1);
 461                                 if (contains(number_unary_operators, c) &&
 462                                     (cur.pos() == 1
 463                                      || par.isSeparator(cur.pos() - 2)
 464                                      || par.isNewline(cur.pos() - 2))
 465                                   ) {
 466                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 467                                                 tm.font_);
 468                                 } else if (contains(number_seperators, c)
 469                                      && cur.pos() >= 2
 470                                      && tm.getDisplayFont(pit, cur.pos() - 2).number() == Font::ON) {
 471                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 472                                                 tm.font_);
 473                                 }
 474                         }
 475                 }
 476         }
 477
 478         // In Bidi text, we want spaces to be treated in a special way: spaces
 479         // which are between words in different languages should get the
 480         // paragraph's language; otherwise, spaces should keep the language
 481         // they were originally typed in. This is only in effect while typing;
 482         // after the text is already typed in, the user can always go back and
 483         // explicitly set the language of a space as desired. But 99.9% of the
 484         // time, what we're doing here is what the user actually meant.
 485         //
 486         // The following cases are the ones in which the language of the space
 487         // should be changed to match that of the containing paragraph. In the
 488         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 489         // represents a space, pipe (|) represents the cursor position (so the
 490         // character before it is the one just typed in). The different cases
 491         // are depicted logically (not visually), from left to right:
 492         //
 493         // 1. A_a|
 494         // 2. a_A|
 495         //
 496         // Theoretically, there are other situations that we should, perhaps, deal
 497         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 498         // point (to understand why, just try to create this situation...).
 499
 500         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 501                 // get font in front and behind the space in question. But do NOT
 502                 // use getFont(cur.pos()) because the character c is not inserted yet
 503                 Font const & pre_space_font  = tm.getDisplayFont(cur.pit(), cur.pos() - 2);
 504                 Font const & post_space_font = cur.real_current_font;
 505                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 506                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 507
 508                 if (pre_space_rtl != post_space_rtl) {
 509                         // Set the space's language to match the language of the
 510                         // adjacent character whose direction is the paragraph's
 511                         // direction; don't touch other properties of the font
 512                         Language const * lang =
 513                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 514                                 pre_space_font.language() : post_space_font.language();
 515
 516                         Font space_font = tm.getDisplayFont(cur.pit(), cur.pos() - 1);
 517                         space_font.setLanguage(lang);
 518                         par.setFont(cur.pos() - 1, space_font);
 519                 }
 520         }
 521
 522         // Next check, if there will be two blanks together or a blank at
 523         // the beginning of a paragraph.
 524         // I decided to handle blanks like normal characters, the main
 525         // difference are the special checks when calculating the row.fill
 526         // (blank does not count at the end of a row) and the check here
 527
 528         // When the free-spacing option is set for the current layout,
 529         // disable the double-space checking
 530         if (!freeSpacing && isLineSeparatorChar(c)) {
 531                 if (cur.pos() == 0) {
 532                         static bool sent_space_message = false;
 533                         if (!sent_space_message) {
 534                                 cur.message(_("You cannot insert a space at the "
 535                                                            "beginning of a paragraph. Please read the Tutorial."));
 536                                 sent_space_message = true;
 537                         }
 538                         return;
 539                 }
 540                 BOOST_ASSERT(cur.pos() > 0);
 541                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 542                     && !par.isDeleted(cur.pos() - 1)) {
 543                         static bool sent_space_message = false;
 544                         if (!sent_space_message) {
 545                                 cur.message(_("You cannot type two spaces this way. "
 546                                                            "Please read the Tutorial."));
 547                                 sent_space_message = true;
 548                         }
 549                         return;
 550                 }
 551         }
 552
 553         par.insertChar(cur.pos(), c, cur.current_font, cur.buffer().params().trackChanges);
 554         checkBufferStructure(cur.buffer(), cur);
 555
 556 //              cur.updateFlags(Update::Force);
 557         setCursor(cur.top(), cur.pit(), cur.pos() + 1);
 558         charInserted(cur);
 559 }
 560
 561
 562 void Text::charInserted(Cursor & cur)
 563 {
 564         // Here we call finishUndo for every 20 characters inserted.
 565         // This is from my experience how emacs does it. (Lgb)
 566         static unsigned int counter;
 567         if (counter < 20) {
 568                 ++counter;
 569         } else {
 570                 cur.finishUndo();
 571                 counter = 0;
 572         }
 573 }
 574
 575
 576 // the cursor set functions have a special mechanism. When they
 577 // realize, that you left an empty paragraph, they will delete it.
 578
 579 bool Text::cursorRightOneWord(Cursor & cur)
 580 {
 581         BOOST_ASSERT(this == cur.text());
 582
 583         Cursor old = cur;
 584
 585         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
 586                 ++old.pit();
 587                 old.pos() = 0;
 588         } else {
 589                 // Advance through word.
 590                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
 591                         ++old.pos();
 592                 // Skip through trailing nonword stuff.
 593                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
 594                         ++old.pos();
 595         }
 596         return setCursor(cur, old.pit(), old.pos());
 597 }
 598
 599
 600 bool Text::cursorLeftOneWord(Cursor & cur)
 601 {
 602         BOOST_ASSERT(this == cur.text());
 603
 604         Cursor old = cur;
 605
 606         if (old.pos() == 0 && old.pit() != 0) {
 607                 --old.pit();
 608                 old.pos() = old.lastpos();
 609         } else {
 610                 // Skip through initial nonword stuff.
 611                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
 612                         --old.pos();
 613                 // Advance through word.
 614                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
 615                         --old.pos();
 616         }
 617         return setCursor(cur, old.pit(), old.pos());
 618 }
 619
 620
 621 void Text::selectWord(Cursor & cur, word_location loc)
 622 {
 623         BOOST_ASSERT(this == cur.text());
 624         CursorSlice from = cur.top();
 625         CursorSlice to = cur.top();
 626         getWord(from, to, loc);
 627         if (cur.top() != from)
 628                 setCursor(cur, from.pit(), from.pos());
 629         if (to == from)
 630                 return;
 631         cur.resetAnchor();
 632         setCursor(cur, to.pit(), to.pos());
 633         cur.setSelection();
 634 }
 635
 636
 637 // Select the word currently under the cursor when no
 638 // selection is currently set
 639 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
 640 {
 641         BOOST_ASSERT(this == cur.text());
 642         if (cur.selection())
 643                 return false;
 644         selectWord(cur, loc);
 645         return cur.selection();
 646 }
 647
 648
 649 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
 650 {
 651         BOOST_ASSERT(this == cur.text());
 652
 653         if (!cur.selection())
 654                 return;
 655
 656         cur.recordUndoSelection();
 657
 658         pit_type begPit = cur.selectionBegin().pit();
 659         pit_type endPit = cur.selectionEnd().pit();
 660
 661         pos_type begPos = cur.selectionBegin().pos();
 662         pos_type endPos = cur.selectionEnd().pos();
 663
 664         // keep selection info, because endPos becomes invalid after the first loop
 665         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
 666
 667         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
 668
 669         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 670                 pos_type parSize = pars_[pit].size();
 671
 672                 // ignore empty paragraphs; otherwise, an assertion will fail for
 673                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
 674                 if (parSize == 0)
 675                         continue;
 676
 677                 // do not consider first paragraph if the cursor starts at pos size()
 678                 if (pit == begPit && begPos == parSize)
 679                         continue;
 680
 681                 // do not consider last paragraph if the cursor ends at pos 0
 682                 if (pit == endPit && endPos == 0)
 683                         break; // last iteration anyway
 684
 685                 pos_type left  = (pit == begPit ? begPos : 0);
 686                 pos_type right = (pit == endPit ? endPos : parSize);
 687
 688                 if (op == ACCEPT) {
 689                         pars_[pit].acceptChanges(cur.buffer().params(), left, right);
 690                 } else {
 691                         pars_[pit].rejectChanges(cur.buffer().params(), left, right);
 692                 }
 693         }
 694
 695         // next, accept/reject imaginary end-of-par characters
 696
 697         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 698                 pos_type pos = pars_[pit].size();
 699
 700                 // skip if the selection ends before the end-of-par
 701                 if (pit == endPit && endsBeforeEndOfPar)
 702                         break; // last iteration anyway
 703
 704                 // skip if this is not the last paragraph of the document
 705                 // note: the user should be able to accept/reject the par break of the last par!
 706                 if (pit == endPit && pit + 1 != int(pars_.size()))
 707                         break; // last iteration anway
 708
 709                 if (op == ACCEPT) {
 710                         if (pars_[pit].isInserted(pos)) {
 711                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 712                         } else if (pars_[pit].isDeleted(pos)) {
 713                                 if (pit + 1 == int(pars_.size())) {
 714                                         // we cannot remove a par break at the end of the last paragraph;
 715                                         // instead, we mark it unchanged
 716                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 717                                 } else {
 718                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 719                                         --endPit;
 720                                         --pit;
 721                                 }
 722                         }
 723                 } else {
 724                         if (pars_[pit].isDeleted(pos)) {
 725                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 726                         } else if (pars_[pit].isInserted(pos)) {
 727                                 if (pit + 1 == int(pars_.size())) {
 728                                         // we mark the par break at the end of the last paragraph unchanged
 729                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 730                                 } else {
 731                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 732                                         --endPit;
 733                                         --pit;
 734                                 }
 735                         }
 736                 }
 737         }
 738
 739         // finally, invoke the DEPM
 740
 741         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer().params().trackChanges);
 742
 743         //
 744
 745         cur.finishUndo();
 746         cur.clearSelection();
 747         setCursorIntern(cur, begPit, begPos);
 748         cur.updateFlags(Update::Force);
 749         updateLabels(cur.buffer());
 750 }
 751
 752
 753 void Text::acceptChanges(BufferParams const & bparams)
 754 {
 755         lyx::acceptChanges(pars_, bparams);
 756         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
 757 }
 758
 759
 760 void Text::rejectChanges(BufferParams const & bparams)
 761 {
 762         pit_type pars_size = static_cast<pit_type>(pars_.size());
 763
 764         // first, reject changes within each individual paragraph
 765         // (do not consider end-of-par)
 766         for (pit_type pit = 0; pit < pars_size; ++pit) {
 767                 if (!pars_[pit].empty())   // prevent assertion failure
 768                         pars_[pit].rejectChanges(bparams, 0, pars_[pit].size());
 769         }
 770
 771         // next, reject imaginary end-of-par characters
 772         for (pit_type pit = 0; pit < pars_size; ++pit) {
 773                 pos_type pos = pars_[pit].size();
 774
 775                 if (pars_[pit].isDeleted(pos)) {
 776                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 777                 } else if (pars_[pit].isInserted(pos)) {
 778                         if (pit == pars_size - 1) {
 779                                 // we mark the par break at the end of the last
 780                                 // paragraph unchanged
 781                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 782                         } else {
 783                                 mergeParagraph(bparams, pars_, pit);
 784                                 --pit;
 785                                 --pars_size;
 786                         }
 787                 }
 788         }
 789
 790         // finally, invoke the DEPM
 791         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
 792 }
 793
 794
 795 void Text::deleteWordForward(Cursor & cur)
 796 {
 797         BOOST_ASSERT(this == cur.text());
 798         if (cur.lastpos() == 0)
 799                 cursorForward(cur);
 800         else {
 801                 cur.resetAnchor();
 802                 cur.selection() = true;
 803                 cursorRightOneWord(cur);
 804                 cur.setSelection();
 805                 cutSelection(cur, true, false);
 806                 checkBufferStructure(cur.buffer(), cur);
 807         }
 808 }
 809
 810
 811 void Text::deleteWordBackward(Cursor & cur)
 812 {
 813         BOOST_ASSERT(this == cur.text());
 814         if (cur.lastpos() == 0)
 815                 cursorBackward(cur);
 816         else {
 817                 cur.resetAnchor();
 818                 cur.selection() = true;
 819                 cursorLeftOneWord(cur);
 820                 cur.setSelection();
 821                 cutSelection(cur, true, false);
 822                 checkBufferStructure(cur.buffer(), cur);
 823         }
 824 }
 825
 826
 827 // Kill to end of line.
 828 void Text::changeCase(Cursor & cur, TextCase action)
 829 {
 830         BOOST_ASSERT(this == cur.text());
 831         CursorSlice from;
 832         CursorSlice to;
 833
 834         if (cur.selection()) {
 835                 from = cur.selBegin();
 836                 to = cur.selEnd();
 837         } else {
 838                 from = cur.top();
 839                 getWord(from, to, PARTIAL_WORD);
 840                 cursorRightOneWord(cur);
 841         }
 842
 843         cur.recordUndoSelection();
 844
 845         pit_type begPit = from.pit();
 846         pit_type endPit = to.pit();
 847
 848         pos_type begPos = from.pos();
 849         pos_type endPos = to.pos();
 850
 851         pos_type right = 0; // needed after the for loop
 852
 853         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 854                 Paragraph & par = pars_[pit];
 855                 pos_type parSize = par.size();
 856                 pos_type pos = (pit == begPit ? begPos : 0);
 857                 right = (pit == endPit ? endPos : parSize);
 858                 par.changeCase(cur.buffer().params(), pos, right, action);
 859         }
 860
 861         // the selection may have changed due to logically-only deleted chars
 862         setCursor(cur, begPit, begPos);
 863         cur.resetAnchor();
 864         setCursor(cur, endPit, right);
 865         cur.setSelection();
 866
 867         checkBufferStructure(cur.buffer(), cur);
 868 }
 869
 870
 871 bool Text::handleBibitems(Cursor & cur)
 872 {
 873         if (cur.paragraph().layout()->labeltype != LABEL_BIBLIO)
 874                 return false;
 875         // if a bibitem is deleted, merge with previous paragraph
 876         // if this is a bibliography item as well
 877         if (cur.pos() == 0) {
 878                 BufferParams const & bufparams = cur.buffer().params();
 879                 Paragraph const & par = cur.paragraph();
 880                 Cursor prevcur = cur;
 881                 if (cur.pit() > 0) {
 882                         --prevcur.pit();
 883                         prevcur.pos() = prevcur.lastpos();
 884                 }
 885                 Paragraph const & prevpar = prevcur.paragraph();
 886                 if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
 887                         cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
 888                         mergeParagraph(bufparams, cur.text()->paragraphs(),
 889                                        prevcur.pit());
 890                         updateLabels(cur.buffer());
 891                         setCursorIntern(cur, prevcur.pit(), prevcur.pos());
 892                         cur.updateFlags(Update::Force);
 893                 // if not, reset the paragraph to default
 894                 } else
 895                         cur.paragraph().layout(
 896                                 bufparams.getTextClass().defaultLayout());
 897                 return true;
 898         }
 899         return false;
 900 }
 901
 902
 903 bool Text::erase(Cursor & cur)
 904 {
 905         BOOST_ASSERT(this == cur.text());
 906         bool needsUpdate = false;
 907         Paragraph & par = cur.paragraph();
 908
 909         if (cur.pos() != cur.lastpos()) {
 910                 // this is the code for a normal delete, not pasting
 911                 // any paragraphs
 912                 cur.recordUndo(DELETE_UNDO);
 913                 if(!par.eraseChar(cur.pos(), cur.buffer().params().trackChanges)) {
 914                         // the character has been logically deleted only => skip it
 915                         cur.top().forwardPos();
 916                 }
 917                 checkBufferStructure(cur.buffer(), cur);
 918                 needsUpdate = true;
 919         } else {
 920                 if (cur.pit() == cur.lastpit())
 921                         return dissolveInset(cur);
 922
 923                 if (!par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
 924                         par.setChange(cur.pos(), Change(Change::DELETED));
 925                         cur.forwardPos();
 926                         needsUpdate = true;
 927                 } else {
 928                         setCursorIntern(cur, cur.pit() + 1, 0);
 929                         needsUpdate = backspacePos0(cur);
 930                 }
 931         }
 932
 933         needsUpdate |= handleBibitems(cur);
 934
 935         if (needsUpdate) {
 936                 // Make sure the cursor is correct. Is this really needed?
 937                 // No, not really... at least not here!
 938                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
 939                 checkBufferStructure(cur.buffer(), cur);
 940         }
 941
 942         return needsUpdate;
 943 }
 944
 945
 946 bool Text::backspacePos0(Cursor & cur)
 947 {
 948         BOOST_ASSERT(this == cur.text());
 949         if (cur.pit() == 0)
 950                 return false;
 951
 952         bool needsUpdate = false;
 953
 954         BufferParams const & bufparams = cur.buffer().params();
 955         TextClass const & tclass = bufparams.getTextClass();
 956         ParagraphList & plist = cur.text()->paragraphs();
 957         Paragraph const & par = cur.paragraph();
 958         Cursor prevcur = cur;
 959         --prevcur.pit();
 960         prevcur.pos() = prevcur.lastpos();
 961         Paragraph const & prevpar = prevcur.paragraph();
 962
 963         // is it an empty paragraph?
 964         if (cur.lastpos() == 0
 965             || (cur.lastpos() == 1 && par.isSeparator(0))) {
 966                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
 967                 plist.erase(boost::next(plist.begin(), cur.pit()));
 968                 needsUpdate = true;
 969         }
 970         // is previous par empty?
 971         else if (prevcur.lastpos() == 0
 972                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
 973                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
 974                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
 975                 needsUpdate = true;
 976         }
 977         // Pasting is not allowed, if the paragraphs have different
 978         // layouts. I think it is a real bug of all other
 979         // word processors to allow it. It confuses the user.
 980         // Correction: Pasting is always allowed with standard-layout
 981         else if (par.layout() == prevpar.layout()
 982                  || par.layout() == tclass.defaultLayout()) {
 983                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
 984                 mergeParagraph(bufparams, plist, prevcur.pit());
 985                 needsUpdate = true;
 986         }
 987
 988         if (needsUpdate) {
 989                 updateLabels(cur.buffer());
 990                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
 991         }
 992
 993         return needsUpdate;
 994 }
 995
 996
 997 bool Text::backspace(Cursor & cur)
 998 {
 999         BOOST_ASSERT(this == cur.text());
1000         bool needsUpdate = false;
1001         if (cur.pos() == 0) {
1002                 if (cur.pit() == 0)
1003                         return dissolveInset(cur);
1004
1005                 Paragraph & prev_par = pars_[cur.pit() - 1];
1006
1007                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1008                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1009                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1010                         return true;
1011                 }
1012                 // The cursor is at the beginning of a paragraph, so
1013                 // the backspace will collapse two paragraphs into one.
1014                 needsUpdate = backspacePos0(cur);
1015
1016         } else {
1017                 // this is the code for a normal backspace, not pasting
1018                 // any paragraphs
1019                 cur.recordUndo(DELETE_UNDO);
1020                 // We used to do cursorBackwardIntern() here, but it is
1021                 // not a good idea since it triggers the auto-delete
1022                 // mechanism. So we do a cursorBackwardIntern()-lite,
1023                 // without the dreaded mechanism. (JMarc)
1024                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1025                                 false, cur.boundary());
1026                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1027                 checkBufferStructure(cur.buffer(), cur);
1028         }
1029
1030         if (cur.pos() == cur.lastpos())
1031                 cur.setCurrentFont();
1032
1033         needsUpdate |= handleBibitems(cur);
1034
1035         // A singlePar update is not enough in this case.
1036 //              cur.updateFlags(Update::Force);
1037         setCursor(cur.top(), cur.pit(), cur.pos());
1038
1039         return needsUpdate;
1040 }
1041
1042
1043 bool Text::dissolveInset(Cursor & cur) {
1044         BOOST_ASSERT(this == cur.text());
1045
1046         if (isMainText(cur.bv().buffer()) || cur.inset().nargs() != 1)
1047                 return false;
1048
1049         cur.recordUndoInset();
1050         cur.selHandle(false);
1051         // save position
1052         pos_type spos = cur.pos();
1053         pit_type spit = cur.pit();
1054         ParagraphList plist;
1055         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1056                 plist = paragraphs();
1057         cur.popLeft();
1058         // store cursor offset
1059         if (spit == 0)
1060                 spos += cur.pos();
1061         spit += cur.pit();
1062         Buffer & b = cur.buffer();
1063         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1064         if (!plist.empty()) {
1065                 // ERT paragraphs have the Language latex_language.
1066                 // This is invalid outside of ERT, so we need to
1067                 // change it to the buffer language.
1068                 ParagraphList::iterator it = plist.begin();
1069                 ParagraphList::iterator it_end = plist.end();
1070                 for (; it != it_end; it++)
1071                         it->changeLanguage(b.params(), latex_language, b.language());
1072
1073                 pasteParagraphList(cur, plist, b.params().getTextClassPtr(),
1074                                    b.errorList("Paste"));
1075                 // restore position
1076                 cur.pit() = std::min(cur.lastpit(), spit);
1077                 cur.pos() = std::min(cur.lastpos(), spos);
1078         }
1079         cur.clearSelection();
1080         cur.resetAnchor();
1081         return true;
1082 }
1083
1084
1085 void Text::getWord(CursorSlice & from, CursorSlice & to,
1086         word_location const loc)
1087 {
1088         Paragraph const & from_par = pars_[from.pit()];
1089         switch (loc) {
1090         case WHOLE_WORD_STRICT:
1091                 if (from.pos() == 0 || from.pos() == from_par.size()
1092                     || !from_par.isLetter(from.pos())
1093                     || !from_par.isLetter(from.pos() - 1)) {
1094                         to = from;
1095                         return;
1096                 }
1097                 // no break here, we go to the next
1098
1099         case WHOLE_WORD:
1100                 // If we are already at the beginning of a word, do nothing
1101                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1102                         break;
1103                 // no break here, we go to the next
1104
1105         case PREVIOUS_WORD:
1106                 // always move the cursor to the beginning of previous word
1107                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1108                         --from.pos();
1109                 break;
1110         case NEXT_WORD:
1111                 lyxerr << "Text::getWord: NEXT_WORD not implemented yet"
1112                        << endl;
1113                 break;
1114         case PARTIAL_WORD:
1115                 // no need to move the 'from' cursor
1116                 break;
1117         }
1118         to = from;
1119         Paragraph & to_par = pars_[to.pit()];
1120         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1121                 ++to.pos();
1122 }
1123
1124
1125 void Text::write(Buffer const & buf, std::ostream & os) const
1126 {
1127         ParagraphList::const_iterator pit = paragraphs().begin();
1128         ParagraphList::const_iterator end = paragraphs().end();
1129         depth_type dth = 0;
1130         for (; pit != end; ++pit)
1131                 pit->write(buf, os, buf.params(), dth);
1132
1133         // Close begin_deeper
1134         for(; dth > 0; --dth)
1135                 os << "\n\\end_deeper";
1136 }
1137
1138
1139 bool Text::read(Buffer const & buf, Lexer & lex, ErrorList & errorList)
1140 {
1141         depth_type depth = 0;
1142
1143         while (lex.isOK()) {
1144                 lex.nextToken();
1145                 string const token = lex.getString();
1146
1147                 if (token.empty())
1148                         continue;
1149
1150                 if (token == "\\end_inset")
1151                         break;
1152
1153                 if (token == "\\end_body")
1154                         continue;
1155
1156                 if (token == "\\begin_body")
1157                         continue;
1158
1159                 if (token == "\\end_document")
1160                         return false;
1161
1162                 if (token == "\\begin_layout") {
1163                         lex.pushToken(token);
1164
1165                         Paragraph par;
1166                         par.params().depth(depth);
1167                         par.setFont(0, Font(Font::ALL_INHERIT, buf.params().language));
1168                         pars_.push_back(par);
1169
1170                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1171                         // not BufferParams
1172                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
1173
1174                 } else if (token == "\\begin_deeper") {
1175                         ++depth;
1176                 } else if (token == "\\end_deeper") {
1177                         if (!depth) {
1178                                 lex.printError("\\end_deeper: " "depth is already null");
1179                         } else {
1180                                 --depth;
1181                         }
1182                 } else {
1183                         lyxerr << "Handling unknown body token: `"
1184                                << token << '\'' << endl;
1185                 }
1186         }
1187         return true;
1188 }
1189
1190 // Returns the current font and depth as a message.
1191 docstring Text::currentState(Cursor & cur)
1192 {
1193         BOOST_ASSERT(this == cur.text());
1194         Buffer & buf = cur.buffer();
1195         Paragraph const & par = cur.paragraph();
1196         odocstringstream os;
1197
1198         if (buf.params().trackChanges)
1199                 os << _("[Change Tracking] ");
1200
1201         Change change = par.lookupChange(cur.pos());
1202
1203         if (change.type != Change::UNCHANGED) {
1204                 Author const & a = buf.params().authors().get(change.author);
1205                 os << _("Change: ") << a.name();
1206                 if (!a.email().empty())
1207                         os << " (" << a.email() << ")";
1208                 // FIXME ctime is english, we should translate that
1209                 os << _(" at ") << ctime(&change.changetime);
1210                 os << " : ";
1211         }
1212
1213         // I think we should only show changes from the default
1214         // font. (Asger)
1215         // No, from the document font (MV)
1216         Font font = cur.real_current_font;
1217         font.reduce(buf.params().getFont());
1218
1219         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1220
1221         // The paragraph depth
1222         int depth = cur.paragraph().getDepth();
1223         if (depth > 0)
1224                 os << bformat(_(", Depth: %1$d"), depth);
1225
1226         // The paragraph spacing, but only if different from
1227         // buffer spacing.
1228         Spacing const & spacing = par.params().spacing();
1229         if (!spacing.isDefault()) {
1230                 os << _(", Spacing: ");
1231                 switch (spacing.getSpace()) {
1232                 case Spacing::Single:
1233                         os << _("Single");
1234                         break;
1235                 case Spacing::Onehalf:
1236                         os << _("OneHalf");
1237                         break;
1238                 case Spacing::Double:
1239                         os << _("Double");
1240                         break;
1241                 case Spacing::Other:
1242                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1243                         break;
1244                 case Spacing::Default:
1245                         // should never happen, do nothing
1246                         break;
1247                 }
1248         }
1249
1250 #ifdef DEVEL_VERSION
1251         os << _(", Inset: ") << &cur.inset();
1252         os << _(", Paragraph: ") << cur.pit();
1253         os << _(", Id: ") << par.id();
1254         os << _(", Position: ") << cur.pos();
1255         // FIXME: Why is the check for par.size() needed?
1256         // We are called with cur.pos() == par.size() quite often.
1257         if (!par.empty() && cur.pos() < par.size()) {
1258                 // Force output of code point, not character
1259                 size_t const c = par.getChar(cur.pos());
1260                 os << _(", Char: 0x") << std::hex << c;
1261         }
1262         os << _(", Boundary: ") << cur.boundary();
1263 //      Row & row = cur.textRow();
1264 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1265 #endif
1266         return os.str();
1267 }
1268
1269
1270 docstring Text::getPossibleLabel(Cursor & cur) const
1271 {
1272         pit_type pit = cur.pit();
1273
1274         LayoutPtr layout = pars_[pit].layout();
1275
1276         docstring text;
1277         docstring par_text = pars_[pit].asString(cur.buffer(), false);
1278         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1279                 if (par_text.empty())
1280                         break;
1281                 docstring head;
1282                 par_text = split(par_text, head, ' ');
1283                 // Is it legal to use spaces in labels ?
1284                 if (i > 0)
1285                         text += '-';
1286                 text += head;
1287         }
1288
1289         // No need for a prefix if the user said so.
1290         if (lyxrc.label_init_length <= 0)
1291                 return text;
1292
1293         // Will contain the label type.
1294         docstring name;
1295
1296         // For section, subsection, etc...
1297         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1298                 LayoutPtr const & layout2 = pars_[pit - 1].layout();
1299                 if (layout2->latextype != LATEX_PARAGRAPH) {
1300                         --pit;
1301                         layout = layout2;
1302                 }
1303         }
1304         if (layout->latextype != LATEX_PARAGRAPH)
1305                 name = from_ascii(layout->latexname());
1306
1307         // for captions, we just take the caption type
1308         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
1309         if (caption_inset)
1310                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1311
1312         // If none of the above worked, we'll see if we're inside various
1313         // types of insets and take our abbreviation from them.
1314         if (name.empty()) {
1315                 InsetCode const codes[] = {
1316                         FLOAT_CODE,
1317                         WRAP_CODE,
1318                         FOOT_CODE
1319                 };
1320                 for (unsigned int i = 0; i < (sizeof codes / sizeof codes[0]); ++i) {
1321                         Inset * float_inset = cur.innerInsetOfType(codes[i]);
1322                         if (float_inset) {
1323                                 name = float_inset->name();
1324                                 break;
1325                         }
1326                 }
1327         }
1328
1329         // Create a correct prefix for prettyref
1330         if (name == "theorem")
1331                 name = from_ascii("thm");
1332         else if (name == "Foot")
1333                 name = from_ascii("fn");
1334         else if (name == "listing")
1335                 name = from_ascii("lst");
1336
1337         if (!name.empty())
1338                 text = name.substr(0, 3) + ':' + text;
1339
1340         return text;
1341 }
1342
1343
1344 void Text::charsTranspose(Cursor & cur)
1345 {
1346         BOOST_ASSERT(this == cur.text());
1347
1348         pos_type pos = cur.pos();
1349
1350         // If cursor is at beginning or end of paragraph, do nothing.
1351         if (pos == cur.lastpos() || pos == 0)
1352                 return;
1353
1354         Paragraph & par = cur.paragraph();
1355
1356         // Get the positions of the characters to be transposed.
1357         pos_type pos1 = pos - 1;
1358         pos_type pos2 = pos;
1359
1360         // In change tracking mode, ignore deleted characters.
1361         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1362                 ++pos2;
1363         if (pos2 == cur.lastpos())
1364                 return;
1365
1366         while (pos1 >= 0 && par.isDeleted(pos1))
1367                 --pos1;
1368         if (pos1 < 0)
1369                 return;
1370
1371         // Don't do anything if one of the "characters" is not regular text.
1372         if (par.isInset(pos1) || par.isInset(pos2))
1373                 return;
1374
1375         // Store the characters to be transposed (including font information).
1376         char_type char1 = par.getChar(pos1);
1377         Font const font1 =
1378                 par.getFontSettings(cur.buffer().params(), pos1);
1379
1380         char_type char2 = par.getChar(pos2);
1381         Font const font2 =
1382                 par.getFontSettings(cur.buffer().params(), pos2);
1383
1384         // And finally, we are ready to perform the transposition.
1385         // Track the changes if Change Tracking is enabled.
1386         bool const trackChanges = cur.buffer().params().trackChanges;
1387
1388         cur.recordUndo();
1389
1390         par.eraseChar(pos2, trackChanges);
1391         par.eraseChar(pos1, trackChanges);
1392         par.insertChar(pos1, char2, font2, trackChanges);
1393         par.insertChar(pos2, char1, font1, trackChanges);
1394
1395         checkBufferStructure(cur.buffer(), cur);
1396
1397         // After the transposition, move cursor to after the transposition.
1398         setCursor(cur, cur.pit(), pos2);
1399         cur.forwardPos();
1400 }
1401
1402
1403 } // namespace lyx