src/text.C

   1 /**
   2  * \file src/text.C
   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 Jean-Marc Lasgouttes
   9  * \author John Levon
  10  * \author André Pönitz
  11  * \author Dekel Tsur
  12  * \author Jürgen Vigna
  13  *
  14  * Full author contact details are available in file CREDITS.
  15  */
  16
  17 #include <config.h>
  18
  19 #include "lyxtext.h"
  20
  21 #include "author.h"
  22 #include "buffer.h"
  23 #include "buffer_funcs.h"
  24 #include "bufferparams.h"
  25 #include "BufferView.h"
  26 #include "bufferview_funcs.h"
  27 #include "cursor.h"
  28 #include "pariterator.h"
  29 #include "coordcache.h"
  30 #include "CutAndPaste.h"
  31 #include "debug.h"
  32 #include "dispatchresult.h"
  33 #include "encoding.h"
  34 #include "errorlist.h"
  35 #include "funcrequest.h"
  36 #include "factory.h"
  37 #include "FontIterator.h"
  38 #include "gettext.h"
  39 #include "language.h"
  40 #include "LColor.h"
  41 #include "lyxlength.h"
  42 #include "lyxlex.h"
  43 #include "lyxrc.h"
  44 #include "lyxrow.h"
  45 #include "metricsinfo.h"
  46 #include "paragraph.h"
  47 #include "paragraph_funcs.h"
  48 #include "ParagraphParameters.h"
  49 #include "rowpainter.h"
  50 #include "undo.h"
  51 #include "vspace.h"
  52 #include "WordLangTuple.h"
  53
  54 #include "frontends/FontMetrics.h"
  55 #include "frontends/Painter.h"
  56
  57 #include "insets/insettext.h"
  58 #include "insets/insetbibitem.h"
  59 #include "insets/insetcaption.h"
  60 #include "insets/insethfill.h"
  61 #include "insets/insetline.h"
  62 #include "insets/insetnewline.h"
  63 #include "insets/insetpagebreak.h"
  64 #include "insets/insetoptarg.h"
  65 #include "insets/insetspace.h"
  66 #include "insets/insetspecialchar.h"
  67 #include "insets/insettabular.h"
  68
  69 #include "support/lstrings.h"
  70 #include "support/textutils.h"
  71 #include "support/convert.h"
  72
  73 #include <boost/current_function.hpp>
  74
  75 #include <sstream>
  76
  77 using std::auto_ptr;
  78 using std::advance;
  79 using std::distance;
  80 using std::max;
  81 using std::min;
  82 using std::endl;
  83 using std::string;
  84
  85 namespace lyx {
  86
  87 using support::bformat;
  88 using support::contains;
  89 using support::lowercase;
  90 using support::split;
  91 using support::uppercase;
  92
  93 using cap::cutSelection;
  94 using cap::pasteParagraphList;
  95
  96 using frontend::FontMetrics;
  97
  98 namespace {
  99
 100 void readParToken(Buffer const & buf, Paragraph & par, LyXLex & lex,
 101         string const & token, LyXFont & font, Change & change, ErrorList & errorList)
 102 {
 103         BufferParams const & bp = buf.params();
 104
 105         if (token[0] != '\\') {
 106 #if 0
 107                 string::const_iterator cit = token.begin();
 108                 for (; cit != token.end(); ++cit)
 109                         par.insertChar(par.size(), (*cit), font, change);
 110 #else
 111                 docstring dstr = lex.getDocString();
 112                 docstring::const_iterator cit = dstr.begin();
 113                 docstring::const_iterator cend = dstr.end();
 114                 for (; cit != cend; ++cit)
 115                         par.insertChar(par.size(), *cit, font, change);
 116 #endif
 117         } else if (token == "\\begin_layout") {
 118                 lex.eatLine();
 119                 string layoutname = lex.getString();
 120
 121                 font = LyXFont(LyXFont::ALL_INHERIT, bp.language);
 122                 change = Change(Change::UNCHANGED);
 123
 124                 LyXTextClass const & tclass = bp.getLyXTextClass();
 125
 126                 if (layoutname.empty()) {
 127                         layoutname = tclass.defaultLayoutName();
 128                 }
 129
 130                 bool hasLayout = tclass.hasLayout(layoutname);
 131
 132                 if (!hasLayout) {
 133                         errorList.push_back(ErrorItem(_("Unknown layout"),
 134                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 135                         from_utf8(layoutname), from_utf8(tclass.name())), par.id(), 0, par.size()));
 136                         layoutname = tclass.defaultLayoutName();
 137                 }
 138
 139                 par.layout(bp.getLyXTextClass()[layoutname]);
 140
 141                 // Test whether the layout is obsolete.
 142                 LyXLayout_ptr const & layout = par.layout();
 143                 if (!layout->obsoleted_by().empty())
 144                         par.layout(bp.getLyXTextClass()[layout->obsoleted_by()]);
 145
 146                 par.params().read(lex);
 147
 148         } else if (token == "\\end_layout") {
 149                 lyxerr << BOOST_CURRENT_FUNCTION
 150                        << ": Solitary \\end_layout in line "
 151                        << lex.getLineNo() << "\n"
 152                        << "Missing \\begin_layout?.\n";
 153         } else if (token == "\\end_inset") {
 154                 lyxerr << BOOST_CURRENT_FUNCTION
 155                        << ": Solitary \\end_inset in line "
 156                        << lex.getLineNo() << "\n"
 157                        << "Missing \\begin_inset?.\n";
 158         } else if (token == "\\begin_inset") {
 159                 InsetBase * inset = readInset(lex, buf);
 160                 if (inset)
 161                         par.insertInset(par.size(), inset, font, change);
 162                 else {
 163                         lex.eatLine();
 164                         docstring line = lex.getDocString();
 165                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 166                                             par.id(), 0, par.size()));
 167                 }
 168         } else if (token == "\\family") {
 169                 lex.next();
 170                 font.setLyXFamily(lex.getString());
 171         } else if (token == "\\series") {
 172                 lex.next();
 173                 font.setLyXSeries(lex.getString());
 174         } else if (token == "\\shape") {
 175                 lex.next();
 176                 font.setLyXShape(lex.getString());
 177         } else if (token == "\\size") {
 178                 lex.next();
 179                 font.setLyXSize(lex.getString());
 180         } else if (token == "\\lang") {
 181                 lex.next();
 182                 string const tok = lex.getString();
 183                 Language const * lang = languages.getLanguage(tok);
 184                 if (lang) {
 185                         font.setLanguage(lang);
 186                 } else {
 187                         font.setLanguage(bp.language);
 188                         lex.printError("Unknown language `$$Token'");
 189                 }
 190         } else if (token == "\\numeric") {
 191                 lex.next();
 192                 font.setNumber(font.setLyXMisc(lex.getString()));
 193         } else if (token == "\\emph") {
 194                 lex.next();
 195                 font.setEmph(font.setLyXMisc(lex.getString()));
 196         } else if (token == "\\bar") {
 197                 lex.next();
 198                 string const tok = lex.getString();
 199
 200                 if (tok == "under")
 201                         font.setUnderbar(LyXFont::ON);
 202                 else if (tok == "no")
 203                         font.setUnderbar(LyXFont::OFF);
 204                 else if (tok == "default")
 205                         font.setUnderbar(LyXFont::INHERIT);
 206                 else
 207                         lex.printError("Unknown bar font flag "
 208                                        "`$$Token'");
 209         } else if (token == "\\noun") {
 210                 lex.next();
 211                 font.setNoun(font.setLyXMisc(lex.getString()));
 212         } else if (token == "\\color") {
 213                 lex.next();
 214                 font.setLyXColor(lex.getString());
 215         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 216
 217                 // Insets don't make sense in a free-spacing context! ---Kayvan
 218                 if (par.isFreeSpacing()) {
 219                         if (token == "\\InsetSpace")
 220                                 par.insertChar(par.size(), ' ', font, change);
 221                         else if (lex.isOK()) {
 222                                 lex.next();
 223                                 string const next_token = lex.getString();
 224                                 if (next_token == "\\-")
 225                                         par.insertChar(par.size(), '-', font, change);
 226                                 else {
 227                                         lex.printError("Token `$$Token' "
 228                                                        "is in free space "
 229                                                        "paragraph layout!");
 230                                 }
 231                         }
 232                 } else {
 233                         auto_ptr<InsetBase> inset;
 234                         if (token == "\\SpecialChar" )
 235                                 inset.reset(new InsetSpecialChar);
 236                         else
 237                                 inset.reset(new InsetSpace);
 238                         inset->read(buf, lex);
 239                         par.insertInset(par.size(), inset.release(),
 240                                         font, change);
 241                 }
 242         } else if (token == "\\backslash") {
 243                 par.insertChar(par.size(), '\\', font, change);
 244         } else if (token == "\\newline") {
 245                 auto_ptr<InsetBase> inset(new InsetNewline);
 246                 inset->read(buf, lex);
 247                 par.insertInset(par.size(), inset.release(), font, change);
 248         } else if (token == "\\LyXTable") {
 249                 auto_ptr<InsetBase> inset(new InsetTabular(buf));
 250                 inset->read(buf, lex);
 251                 par.insertInset(par.size(), inset.release(), font, change);
 252         } else if (token == "\\hfill") {
 253                 par.insertInset(par.size(), new InsetHFill, font, change);
 254         } else if (token == "\\lyxline") {
 255                 par.insertInset(par.size(), new InsetLine, font, change);
 256         } else if (token == "\\newpage") {
 257                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 258         } else if (token == "\\clearpage") {
 259                 par.insertInset(par.size(), new InsetClearPage, font, change);
 260         } else if (token == "\\cleardoublepage") {
 261                 par.insertInset(par.size(), new InsetClearDoublePage, font, change);
 262         } else if (token == "\\change_unchanged") {
 263                 change = Change(Change::UNCHANGED);
 264         } else if (token == "\\change_inserted") {
 265                 lex.eatLine();
 266                 std::istringstream is(lex.getString());
 267                 unsigned int aid;
 268                 time_type ct;
 269                 is >> aid >> ct;
 270                 if (aid >= bp.author_map.size()) {
 271                         errorList.push_back(ErrorItem(_("Change tracking error"),
 272                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 273                                             par.id(), 0, par.size()));
 274                         change = Change(Change::UNCHANGED);
 275                 } else
 276                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 277         } else if (token == "\\change_deleted") {
 278                 lex.eatLine();
 279                 std::istringstream is(lex.getString());
 280                 unsigned int aid;
 281                 time_type ct;
 282                 is >> aid >> ct;
 283                 if (aid >= bp.author_map.size()) {
 284                         errorList.push_back(ErrorItem(_("Change tracking error"),
 285                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 286                                             par.id(), 0, par.size()));
 287                         change = Change(Change::UNCHANGED);
 288                 } else
 289                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 290         } else {
 291                 lex.eatLine();
 292                 errorList.push_back(ErrorItem(_("Unknown token"),
 293                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 294                         lex.getDocString()),
 295                         par.id(), 0, par.size()));
 296         }
 297 }
 298
 299
 300 void readParagraph(Buffer const & buf, Paragraph & par, LyXLex & lex,
 301         ErrorList & errorList)
 302 {
 303         lex.nextToken();
 304         string token = lex.getString();
 305         LyXFont font;
 306         Change change(Change::UNCHANGED);
 307
 308         while (lex.isOK()) {
 309                 readParToken(buf, par, lex, token, font, change, errorList);
 310
 311                 lex.nextToken();
 312                 token = lex.getString();
 313
 314                 if (token.empty())
 315                         continue;
 316
 317                 if (token == "\\end_layout") {
 318                         //Ok, paragraph finished
 319                         break;
 320                 }
 321
 322                 LYXERR(Debug::PARSER) << "Handling paragraph token: `"
 323                                       << token << '\'' << endl;
 324                 if (token == "\\begin_layout" || token == "\\end_document"
 325                     || token == "\\end_inset" || token == "\\begin_deeper"
 326                     || token == "\\end_deeper") {
 327                         lex.pushToken(token);
 328                         lyxerr << "Paragraph ended in line "
 329                                << lex.getLineNo() << "\n"
 330                                << "Missing \\end_layout.\n";
 331                         break;
 332                 }
 333         }
 334         // Final change goes to paragraph break:
 335         par.setChange(par.size(), change);
 336
 337         // Initialize begin_of_body_ on load; redoParagraph maintains
 338         par.setBeginOfBody();
 339 }
 340
 341
 342 } // namespace anon
 343
 344
 345
 346 double LyXText::spacing(Buffer const & buffer,
 347                 Paragraph const & par) const
 348 {
 349         if (par.params().spacing().isDefault())
 350                 return buffer.params().spacing().getValue();
 351         return par.params().spacing().getValue();
 352 }
 353
 354
 355 int LyXText::singleWidth(Buffer const & buffer, Paragraph const & par,
 356                 pos_type pos) const
 357 {
 358         return singleWidth(par, pos, par.getChar(pos),
 359                 getFont(buffer, par, pos));
 360 }
 361
 362
 363 int LyXText::singleWidth(Paragraph const & par,
 364                          pos_type pos, char_type c, LyXFont const & font) const
 365 {
 366         // The most common case is handled first (Asger)
 367         if (isPrintable(c)) {
 368                 Language const * language = font.language();
 369                 if (language->rightToLeft()) {
 370                         if (language->lang() == "arabic") {
 371                                 if (Encodings::isComposeChar_arabic(c))
 372                                         return 0;
 373                                 c = par.transformChar(c, pos);
 374                         } else if (language->lang() == "hebrew" &&
 375                                    Encodings::isComposeChar_hebrew(c))
 376                                 return 0;
 377                 }
 378                 return theFontMetrics(font).width(c);
 379         }
 380
 381         if (c == Paragraph::META_INSET)
 382                 return par.getInset(pos)->width();
 383
 384         return theFontMetrics(font).width(c);
 385 }
 386
 387
 388 int LyXText::leftMargin(Buffer const & buffer, int max_width, pit_type pit) const
 389 {
 390         BOOST_ASSERT(pit >= 0);
 391         BOOST_ASSERT(pit < int(pars_.size()));
 392         return leftMargin(buffer, max_width, pit, pars_[pit].size());
 393 }
 394
 395
 396 int LyXText::leftMargin(Buffer const & buffer, int max_width,
 397                 pit_type const pit, pos_type const pos) const
 398 {
 399         BOOST_ASSERT(pit >= 0);
 400         BOOST_ASSERT(pit < int(pars_.size()));
 401         Paragraph const & par = pars_[pit];
 402         BOOST_ASSERT(pos >= 0);
 403         BOOST_ASSERT(pos <= par.size());
 404         //lyxerr << "LyXText::leftMargin: pit: " << pit << " pos: " << pos << endl;
 405         LyXTextClass const & tclass = buffer.params().getLyXTextClass();
 406         LyXLayout_ptr const & layout = par.layout();
 407
 408         string parindent = layout->parindent;
 409
 410         int l_margin = 0;
 411
 412         if (isMainText(buffer))
 413                 l_margin += changebarMargin();
 414
 415         // FIXME UNICODE
 416         docstring leftm = from_utf8(tclass.leftmargin());
 417         l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(leftm);
 418
 419         if (par.getDepth() != 0) {
 420                 // find the next level paragraph
 421                 pit_type newpar = outerHook(pit, pars_);
 422                 if (newpar != pit_type(pars_.size())) {
 423                         if (pars_[newpar].layout()->isEnvironment()) {
 424                                 l_margin = leftMargin(buffer, max_width, newpar);
 425                         }
 426                         if (par.layout() == tclass.defaultLayout()) {
 427                                 if (pars_[newpar].params().noindent())
 428                                         parindent.erase();
 429                                 else
 430                                         parindent = pars_[newpar].layout()->parindent;
 431                         }
 432                 }
 433         }
 434
 435         // This happens after sections in standard classes. The 1.3.x
 436         // code compared depths too, but it does not seem necessary
 437         // (JMarc)
 438         if (par.layout() == tclass.defaultLayout()
 439             && pit > 0 && pars_[pit - 1].layout()->nextnoindent)
 440                 parindent.erase();
 441
 442         LyXFont const labelfont = getLabelFont(buffer, par);
 443         FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
 444
 445         switch (layout->margintype) {
 446         case MARGIN_DYNAMIC:
 447                 if (!layout->leftmargin.empty()) {
 448                         // FIXME UNICODE
 449                         docstring leftm = from_utf8(layout->leftmargin);
 450                         l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(leftm);
 451                 }
 452                 if (!par.getLabelstring().empty()) {
 453                         // FIXME UNICODE
 454                         docstring labin = from_utf8(layout->labelindent);
 455                         l_margin += labelfont_metrics.signedWidth(labin);
 456                         docstring labstr = par.getLabelstring();
 457                         l_margin += labelfont_metrics.width(labstr);
 458                         docstring labsep = from_utf8(layout->labelsep);
 459                         l_margin += labelfont_metrics.width(labsep);
 460                 }
 461                 break;
 462
 463         case MARGIN_MANUAL: {
 464                 // FIXME UNICODE
 465                 docstring labin = from_utf8(layout->labelindent);
 466                 l_margin += labelfont_metrics.signedWidth(labin);
 467                 // The width of an empty par, even with manual label, should be 0
 468                 if (!par.empty() && pos >= par.beginOfBody()) {
 469                         if (!par.getLabelWidthString().empty()) {
 470                                 docstring labstr = par.getLabelWidthString();
 471                                 l_margin += labelfont_metrics.width(labstr);
 472                                 docstring labsep = from_utf8(layout->labelsep);
 473                                 l_margin += labelfont_metrics.width(labsep);
 474                         }
 475                 }
 476                 break;
 477         }
 478
 479         case MARGIN_STATIC: {
 480                 // FIXME UNICODE
 481                 docstring leftm = from_utf8(layout->leftmargin);
 482                 l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(leftm)
 483                         * 4     / (par.getDepth() + 4);
 484                 break;
 485         }
 486
 487         case MARGIN_FIRST_DYNAMIC:
 488                 if (layout->labeltype == LABEL_MANUAL) {
 489                         if (pos >= par.beginOfBody()) {
 490                                 // FIXME UNICODE
 491                                 l_margin += labelfont_metrics.signedWidth(
 492                                         from_utf8(layout->leftmargin));
 493                         } else {
 494                                 // FIXME UNICODE
 495                                 l_margin += labelfont_metrics.signedWidth(
 496                                         from_utf8(layout->labelindent));
 497                         }
 498                 } else if (pos != 0
 499                            // Special case to fix problems with
 500                            // theorems (JMarc)
 501                            || (layout->labeltype == LABEL_STATIC
 502                                && layout->latextype == LATEX_ENVIRONMENT
 503                                && !isFirstInSequence(pit, pars_))) {
 504                         // FIXME UNICODE
 505                         l_margin += labelfont_metrics.signedWidth(from_utf8(layout->leftmargin));
 506                 } else if (layout->labeltype != LABEL_TOP_ENVIRONMENT
 507                            && layout->labeltype != LABEL_BIBLIO
 508                            && layout->labeltype !=
 509                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 510                         l_margin += labelfont_metrics.signedWidth(from_utf8(layout->labelindent));
 511                         l_margin += labelfont_metrics.width(from_utf8(layout->labelsep));
 512                         l_margin += labelfont_metrics.width(par.getLabelstring());
 513                 }
 514                 break;
 515
 516         case MARGIN_RIGHT_ADDRESS_BOX: {
 517 #if 0
 518                 // ok, a terrible hack. The left margin depends on the widest
 519                 // row in this paragraph.
 520                 RowList::iterator rit = par.rows().begin();
 521                 RowList::iterator end = par.rows().end();
 522 #ifdef WITH_WARNINGS
 523 #warning This is wrong.
 524 #endif
 525                 int minfill = max_width;
 526                 for ( ; rit != end; ++rit)
 527                         if (rit->fill() < minfill)
 528                                 minfill = rit->fill();
 529                 l_margin += theFontMetrics(params.getFont()).signedWidth(layout->leftmargin);
 530                 l_margin += minfill;
 531 #endif
 532                 // also wrong, but much shorter.
 533                 l_margin += max_width / 2;
 534                 break;
 535         }
 536         }
 537
 538         if (!par.params().leftIndent().zero())
 539                 l_margin += par.params().leftIndent().inPixels(max_width);
 540
 541         LyXAlignment align;
 542
 543         if (par.params().align() == LYX_ALIGN_LAYOUT)
 544                 align = layout->align;
 545         else
 546                 align = par.params().align();
 547
 548         // set the correct parindent
 549         if (pos == 0
 550             && (layout->labeltype == LABEL_NO_LABEL
 551                || layout->labeltype == LABEL_TOP_ENVIRONMENT
 552                || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 553                || (layout->labeltype == LABEL_STATIC
 554                    && layout->latextype == LATEX_ENVIRONMENT
 555                    && !isFirstInSequence(pit, pars_)))
 556             && align == LYX_ALIGN_BLOCK
 557             && !par.params().noindent()
 558             // in some insets, paragraphs are never indented
 559             && !(par.inInset() && par.inInset()->neverIndent(buffer))
 560             // display style insets are always centered, omit indentation
 561             && !(!par.empty()
 562                     && par.isInset(pos)
 563                     && par.getInset(pos)->display())
 564             && (par.layout() != tclass.defaultLayout()
 565                 || buffer.params().paragraph_separation ==
 566                    BufferParams::PARSEP_INDENT))
 567         {
 568                 docstring din = from_utf8(parindent);
 569                 l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(din);
 570         }
 571
 572         return l_margin;
 573 }
 574
 575
 576 LColor_color LyXText::backgroundColor() const
 577 {
 578         return LColor_color(LColor::color(background_color_));
 579 }
 580
 581
 582 void LyXText::breakParagraph(LCursor & cur, bool keep_layout)
 583 {
 584         BOOST_ASSERT(this == cur.text());
 585
 586         Paragraph & cpar = cur.paragraph();
 587         pit_type cpit = cur.pit();
 588
 589         LyXTextClass const & tclass = cur.buffer().params().getLyXTextClass();
 590         LyXLayout_ptr const & layout = cpar.layout();
 591
 592         // this is only allowed, if the current paragraph is not empty
 593         // or caption and if it has not the keepempty flag active
 594         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 595             layout->labeltype != LABEL_SENSITIVE)
 596                 return;
 597
 598         // a layout change may affect also the following paragraph
 599         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 600
 601         // Always break behind a space
 602         // It is better to erase the space (Dekel)
 603         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 604                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
 605
 606         // What should the layout for the new paragraph be?
 607         int preserve_layout = 0;
 608         if (keep_layout)
 609                 preserve_layout = 2;
 610         else
 611                 preserve_layout = layout->isEnvironment();
 612
 613         // We need to remember this before we break the paragraph, because
 614         // that invalidates the layout variable
 615         bool sensitive = layout->labeltype == LABEL_SENSITIVE;
 616
 617         // we need to set this before we insert the paragraph.
 618         bool const isempty = cpar.allowEmpty() && cpar.empty();
 619
 620         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
 621                          cur.pos(), preserve_layout);
 622
 623         // After this, neither paragraph contains any rows!
 624
 625         cpit = cur.pit();
 626         pit_type next_par = cpit + 1;
 627
 628         // well this is the caption hack since one caption is really enough
 629         if (sensitive) {
 630                 if (cur.pos() == 0)
 631                         // set to standard-layout
 632                         pars_[cpit].applyLayout(tclass.defaultLayout());
 633                 else
 634                         // set to standard-layout
 635                         pars_[next_par].applyLayout(tclass.defaultLayout());
 636         }
 637
 638         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 639                 if (!pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges))
 640                         break; // the character couldn't be deleted physically due to change tracking
 641         }
 642
 643         ParIterator current_it(cur);
 644         ParIterator last_it(cur);
 645         ++last_it;
 646         ++last_it;
 647
 648         updateLabels(cur.buffer(), current_it, last_it);
 649
 650         // A singlePar update is not enough in this case.
 651         cur.updateFlags(Update::Force);
 652
 653         // This check is necessary. Otherwise the new empty paragraph will
 654         // be deleted automatically. And it is more friendly for the user!
 655         if (cur.pos() != 0 || isempty)
 656                 setCursor(cur, cur.pit() + 1, 0);
 657         else
 658                 setCursor(cur, cur.pit(), 0);
 659 }
 660
 661
 662 // insert a character, moves all the following breaks in the
 663 // same Paragraph one to the right and make a rebreak
 664 void LyXText::insertChar(LCursor & cur, char_type c)
 665 {
 666         BOOST_ASSERT(this == cur.text());
 667         BOOST_ASSERT(c != Paragraph::META_INSET);
 668
 669         recordUndo(cur, Undo::INSERT);
 670
 671         Buffer const & buffer = cur.buffer();
 672         Paragraph & par = cur.paragraph();
 673         // try to remove this
 674         pit_type const pit = cur.pit();
 675
 676         bool const freeSpacing = par.layout()->free_spacing ||
 677                 par.isFreeSpacing();
 678
 679         if (lyxrc.auto_number) {
 680                 static docstring const number_operators = from_ascii("+-/*");
 681                 static docstring const number_unary_operators = from_ascii("+-");
 682                 static docstring const number_seperators = from_ascii(".,:");
 683
 684                 if (current_font.number() == LyXFont::ON) {
 685                         if (!isDigit(c) && !contains(number_operators, c) &&
 686                             !(contains(number_seperators, c) &&
 687                               cur.pos() != 0 &&
 688                               cur.pos() != cur.lastpos() &&
 689                               getFont(buffer, par, cur.pos()).number() == LyXFont::ON &&
 690                               getFont(buffer, par, cur.pos() - 1).number() == LyXFont::ON)
 691                            )
 692                                 number(cur); // Set current_font.number to OFF
 693                 } else if (isDigit(c) &&
 694                            real_current_font.isVisibleRightToLeft()) {
 695                         number(cur); // Set current_font.number to ON
 696
 697                         if (cur.pos() != 0) {
 698                                 char_type const c = par.getChar(cur.pos() - 1);
 699                                 if (contains(number_unary_operators, c) &&
 700                                     (cur.pos() == 1
 701                                      || par.isSeparator(cur.pos() - 2)
 702                                      || par.isNewline(cur.pos() - 2))
 703                                   ) {
 704                                         setCharFont(buffer, pit, cur.pos() - 1, current_font);
 705                                 } else if (contains(number_seperators, c)
 706                                      && cur.pos() >= 2
 707                                      && getFont(buffer, par, cur.pos() - 2).number() == LyXFont::ON) {
 708                                         setCharFont(buffer, pit, cur.pos() - 1, current_font);
 709                                 }
 710                         }
 711                 }
 712         }
 713
 714         // First check, if there will be two blanks together or a blank at
 715         // the beginning of a paragraph.
 716         // I decided to handle blanks like normal characters, the main
 717         // difference are the special checks when calculating the row.fill
 718         // (blank does not count at the end of a row) and the check here
 719
 720         // When the free-spacing option is set for the current layout,
 721         // disable the double-space checking
 722         if (!freeSpacing && isLineSeparatorChar(c)) {
 723                 if (cur.pos() == 0) {
 724                         static bool sent_space_message = false;
 725                         if (!sent_space_message) {
 726                                 cur.message(_("You cannot insert a space at the "
 727                                                            "beginning of a paragraph. Please read the Tutorial."));
 728                                 sent_space_message = true;
 729                         }
 730                         return;
 731                 }
 732                 BOOST_ASSERT(cur.pos() > 0);
 733                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 734                     && !par.isDeleted(cur.pos() - 1)) {
 735                         static bool sent_space_message = false;
 736                         if (!sent_space_message) {
 737                                 cur.message(_("You cannot type two spaces this way. "
 738                                                            "Please read the Tutorial."));
 739                                 sent_space_message = true;
 740                         }
 741                         return;
 742                 }
 743         }
 744
 745         par.insertChar(cur.pos(), c, current_font, cur.buffer().params().trackChanges);
 746         checkBufferStructure(cur.buffer(), cur);
 747
 748 //              cur.updateFlags(Update::Force);
 749         setCursor(cur.top(), cur.pit(), cur.pos() + 1);
 750         charInserted();
 751 }
 752
 753
 754 void LyXText::charInserted()
 755 {
 756         // Here we call finishUndo for every 20 characters inserted.
 757         // This is from my experience how emacs does it. (Lgb)
 758         static unsigned int counter;
 759         if (counter < 20) {
 760                 ++counter;
 761         } else {
 762                 finishUndo();
 763                 counter = 0;
 764         }
 765 }
 766
 767
 768 // the cursor set functions have a special mechanism. When they
 769 // realize, that you left an empty paragraph, they will delete it.
 770
 771 bool LyXText::cursorRightOneWord(LCursor & cur)
 772 {
 773         BOOST_ASSERT(this == cur.text());
 774
 775         LCursor old = cur;
 776
 777         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
 778                 ++old.pit();
 779                 old.pos() = 0;
 780         } else {
 781                 // Advance through word.
 782                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
 783                         ++old.pos();
 784                 // Skip through trailing nonword stuff.
 785                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
 786                         ++old.pos();
 787         }
 788         return setCursor(cur, old.pit(), old.pos());
 789 }
 790
 791
 792 bool LyXText::cursorLeftOneWord(LCursor & cur)
 793 {
 794         BOOST_ASSERT(this == cur.text());
 795
 796         LCursor old = cur;
 797
 798         if (old.pos() == 0 && old.pit() != 0) {
 799                 --old.pit();
 800                 old.pos() = old.lastpos();
 801         } else {
 802                 // Skip through initial nonword stuff.
 803                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
 804                         --old.pos();
 805                 // Advance through word.
 806                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
 807                         --old.pos();
 808         }
 809         return setCursor(cur, old.pit(), old.pos());
 810 }
 811
 812
 813 void LyXText::selectWord(LCursor & cur, word_location loc)
 814 {
 815         BOOST_ASSERT(this == cur.text());
 816         CursorSlice from = cur.top();
 817         CursorSlice to = cur.top();
 818         getWord(from, to, loc);
 819         if (cur.top() != from)
 820                 setCursor(cur, from.pit(), from.pos());
 821         if (to == from)
 822                 return;
 823         cur.resetAnchor();
 824         setCursor(cur, to.pit(), to.pos());
 825         cur.setSelection();
 826         cap::saveSelection(cur);
 827 }
 828
 829
 830 // Select the word currently under the cursor when no
 831 // selection is currently set
 832 bool LyXText::selectWordWhenUnderCursor(LCursor & cur, word_location loc)
 833 {
 834         BOOST_ASSERT(this == cur.text());
 835         if (cur.selection())
 836                 return false;
 837         selectWord(cur, loc);
 838         return cur.selection();
 839 }
 840
 841
 842 void LyXText::acceptOrRejectChanges(LCursor & cur, ChangeOp op)
 843 {
 844         BOOST_ASSERT(this == cur.text());
 845
 846         if (!cur.selection())
 847                 return;
 848
 849         recordUndoSelection(cur, Undo::ATOMIC);
 850
 851         pit_type begPit = cur.selectionBegin().pit();
 852         pit_type endPit = cur.selectionEnd().pit();
 853
 854         pos_type begPos = cur.selectionBegin().pos();
 855         pos_type endPos = cur.selectionEnd().pos();
 856
 857         // keep selection info, because endPos becomes invalid after the first loop
 858         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
 859
 860         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
 861
 862         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 863                 pos_type parSize = pars_[pit].size();
 864
 865                 // ignore empty paragraphs; otherwise, an assertion will fail for
 866                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
 867                 if (parSize == 0)
 868                         continue;
 869
 870                 // do not consider first paragraph if the cursor starts at pos size()
 871                 if (pit == begPit && begPos == parSize)
 872                         continue;
 873
 874                 // do not consider last paragraph if the cursor ends at pos 0
 875                 if (pit == endPit && endPos == 0)
 876                         break; // last iteration anyway
 877
 878                 pos_type left  = (pit == begPit ? begPos : 0);
 879                 pos_type right = (pit == endPit ? endPos : parSize);
 880
 881                 if (op == ACCEPT) {
 882                         pars_[pit].acceptChanges(cur.buffer().params(), left, right);
 883                 } else {
 884                         pars_[pit].rejectChanges(cur.buffer().params(), left, right);
 885                 }
 886         }
 887
 888         // next, accept/reject imaginary end-of-par characters
 889
 890         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 891                 pos_type pos = pars_[pit].size();
 892
 893                 // skip if the selection ends before the end-of-par
 894                 if (pit == endPit && endsBeforeEndOfPar)
 895                         break; // last iteration anyway
 896
 897                 // skip if this is not the last paragraph of the document
 898                 // note: the user should be able to accept/reject the par break of the last par!
 899                 if (pit == endPit && pit != pars_.size() - 1)
 900                         break; // last iteration anway
 901
 902                 if (op == ACCEPT) {
 903                         if (pars_[pit].isInserted(pos)) {
 904                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 905                         } else if (pars_[pit].isDeleted(pos)) {
 906                                 if (pit == pars_.size() - 1) {
 907                                         // we cannot remove a par break at the end of the last paragraph;
 908                                         // instead, we mark it unchanged
 909                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 910                                 } else {
 911                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 912                                         --endPit;
 913                                         --pit;
 914                                 }
 915                         }
 916                 } else {
 917                         if (pars_[pit].isDeleted(pos)) {
 918                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 919                         } else if (pars_[pit].isInserted(pos)) {
 920                                 if (pit == pars_.size() - 1) {
 921                                         // we mark the par break at the end of the last paragraph unchanged
 922                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 923                                 } else {
 924                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 925                                         --endPit;
 926                                         --pit;
 927                                 }
 928                         }
 929                 }
 930         }
 931
 932         // finally, invoke the DEPM
 933
 934         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer().params().trackChanges);
 935
 936         //
 937
 938         finishUndo();
 939         cur.clearSelection();
 940         setCursorIntern(cur, begPit, begPos);
 941         cur.updateFlags(Update::Force);
 942         updateLabels(cur.buffer());
 943 }
 944
 945
 946 void LyXText::acceptChanges(BufferParams const & bparams)
 947 {
 948         pit_type pars_size = static_cast<pit_type>(pars_.size());
 949
 950         // first, accept changes within each individual paragraph
 951         // (do not consider end-of-par)
 952         for (pit_type pit = 0; pit < pars_size; ++pit) {
 953                 if (!pars_[pit].empty())   // prevent assertion failure
 954                         pars_[pit].acceptChanges(bparams, 0, pars_[pit].size());
 955         }
 956
 957         // next, accept imaginary end-of-par characters
 958         for (pit_type pit = 0; pit < pars_size; ++pit) {
 959                 pos_type pos = pars_[pit].size();
 960
 961                 if (pars_[pit].isInserted(pos)) {
 962                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 963                 } else if (pars_[pit].isDeleted(pos)) {
 964                         if (pit == pars_size - 1) {
 965                                 // we cannot remove a par break at the end of the last
 966                                 // paragraph; instead, we mark it unchanged
 967                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 968                         } else {
 969                                 mergeParagraph(bparams, pars_, pit);
 970                                 --pit;
 971                                 --pars_size;
 972                         }
 973                 }
 974         }
 975
 976         // finally, invoke the DEPM
 977         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
 978 }
 979
 980
 981 void LyXText::rejectChanges(BufferParams const & bparams)
 982 {
 983         pit_type pars_size = static_cast<pit_type>(pars_.size());
 984
 985         // first, reject changes within each individual paragraph
 986         // (do not consider end-of-par)
 987         for (pit_type pit = 0; pit < pars_size; ++pit) {
 988                 if (!pars_[pit].empty())   // prevent assertion failure
 989                         pars_[pit].rejectChanges(bparams, 0, pars_[pit].size());
 990         }
 991
 992         // next, reject imaginary end-of-par characters
 993         for (pit_type pit = 0; pit < pars_size; ++pit) {
 994                 pos_type pos = pars_[pit].size();
 995
 996                 if (pars_[pit].isDeleted(pos)) {
 997                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 998                 } else if (pars_[pit].isInserted(pos)) {
 999                         if (pit == pars_size - 1) {
1000                                 // we mark the par break at the end of the last
1001                                 // paragraph unchanged
1002                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1003                         } else {
1004                                 mergeParagraph(bparams, pars_, pit);
1005                                 --pit;
1006                                 --pars_size;
1007                         }
1008                 }
1009         }
1010
1011         // finally, invoke the DEPM
1012         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
1013 }
1014
1015
1016 // Delete from cursor up to the end of the current or next word.
1017 void LyXText::deleteWordForward(LCursor & cur)
1018 {
1019         BOOST_ASSERT(this == cur.text());
1020         if (cur.lastpos() == 0)
1021                 cursorRight(cur);
1022         else {
1023                 cur.resetAnchor();
1024                 cur.selection() = true;
1025                 cursorRightOneWord(cur);
1026                 cur.setSelection();
1027                 cutSelection(cur, true, false);
1028                 checkBufferStructure(cur.buffer(), cur);
1029         }
1030 }
1031
1032
1033 // Delete from cursor to start of current or prior word.
1034 void LyXText::deleteWordBackward(LCursor & cur)
1035 {
1036         BOOST_ASSERT(this == cur.text());
1037         if (cur.lastpos() == 0)
1038                 cursorLeft(cur);
1039         else {
1040                 cur.resetAnchor();
1041                 cur.selection() = true;
1042                 cursorLeftOneWord(cur);
1043                 cur.setSelection();
1044                 cutSelection(cur, true, false);
1045                 checkBufferStructure(cur.buffer(), cur);
1046         }
1047 }
1048
1049
1050 // Kill to end of line.
1051 void LyXText::deleteLineForward(LCursor & cur)
1052 {
1053         BOOST_ASSERT(this == cur.text());
1054         if (cur.lastpos() == 0) {
1055                 // Paragraph is empty, so we just go to the right
1056                 cursorRight(cur);
1057         } else {
1058                 cur.resetAnchor();
1059                 cur.selection() = true; // to avoid deletion
1060                 cursorEnd(cur);
1061                 cur.setSelection();
1062                 // What is this test for ??? (JMarc)
1063                 if (!cur.selection())
1064                         deleteWordForward(cur);
1065                 else
1066                         cutSelection(cur, true, false);
1067                 checkBufferStructure(cur.buffer(), cur);
1068         }
1069 }
1070
1071
1072 void LyXText::changeCase(LCursor & cur, LyXText::TextCase action)
1073 {
1074         BOOST_ASSERT(this == cur.text());
1075         CursorSlice from;
1076         CursorSlice to;
1077
1078         if (cur.selection()) {
1079                 from = cur.selBegin();
1080                 to = cur.selEnd();
1081         } else {
1082                 from = cur.top();
1083                 getWord(from, to, PARTIAL_WORD);
1084                 cursorRightOneWord(cur);
1085         }
1086
1087         recordUndoSelection(cur, Undo::ATOMIC);
1088
1089         pit_type begPit = from.pit();
1090         pit_type endPit = to.pit();
1091
1092         pos_type begPos = from.pos();
1093         pos_type endPos = to.pos();
1094
1095         bool const trackChanges = cur.buffer().params().trackChanges;
1096
1097         pos_type right = 0; // needed after the for loop
1098
1099         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1100                 pos_type parSize = pars_[pit].size();
1101
1102                 pos_type pos = (pit == begPit ? begPos : 0);
1103                 right = (pit == endPit ? endPos : parSize);
1104
1105                 // process sequences of modified characters; in change
1106                 // tracking mode, this approach results in much better
1107                 // usability than changing case on a char-by-char basis
1108                 docstring changes;
1109
1110                 bool capitalize = true;
1111
1112                 for (; pos < right; ++pos) {
1113                         char_type oldChar = pars_[pit].getChar(pos);
1114                         char_type newChar = oldChar;
1115
1116                         // ignore insets and don't play with deleted text!
1117                         if (oldChar != Paragraph::META_INSET && !pars_[pit].isDeleted(pos)) {
1118                                 switch (action) {
1119                                 case text_lowercase:
1120                                         newChar = lowercase(oldChar);
1121                                         break;
1122                                 case text_capitalization:
1123                                         if (capitalize) {
1124                                                 newChar = uppercase(oldChar);
1125                                                 capitalize = false;
1126                                         }
1127                                         break;
1128                                 case text_uppercase:
1129                                         newChar = uppercase(oldChar);
1130                                         break;
1131                                 }
1132                         }
1133
1134                         if (!pars_[pit].isLetter(pos) || pars_[pit].isDeleted(pos)) {
1135                                 capitalize = true; // permit capitalization again
1136                         }
1137
1138                         if (oldChar != newChar) {
1139                                 changes += newChar;
1140                         }
1141
1142                         if (oldChar == newChar || pos == right - 1) {
1143                                 if (oldChar != newChar) {
1144                                         pos++; // step behind the changing area
1145                                 }
1146                                 int erasePos = pos - changes.size();
1147                                 for (size_t i = 0; i < changes.size(); i++) {
1148                                         pars_[pit].insertChar(pos, changes[i],
1149                                                 pars_[pit].getFontSettings(cur.buffer().params(),
1150                                                                 erasePos),
1151                                                 trackChanges);
1152                                         if (!pars_[pit].eraseChar(erasePos, trackChanges)) {
1153                                                 ++erasePos;
1154                                                 ++pos; // advance
1155                                                 ++right; // expand selection
1156                                         }
1157                                 }
1158                                 changes.clear();
1159                         }
1160                 }
1161         }
1162
1163         // the selection may have changed due to logically-only deleted chars
1164         setCursor(cur, begPit, begPos);
1165         cur.resetAnchor();
1166         setCursor(cur, endPit, right);
1167         cur.setSelection();
1168
1169         checkBufferStructure(cur.buffer(), cur);
1170 }
1171
1172
1173 bool LyXText::erase(LCursor & cur)
1174 {
1175         BOOST_ASSERT(this == cur.text());
1176         bool needsUpdate = false;
1177         Paragraph & par = cur.paragraph();
1178
1179         if (cur.pos() != cur.lastpos()) {
1180                 // this is the code for a normal delete, not pasting
1181                 // any paragraphs
1182                 recordUndo(cur, Undo::DELETE);
1183                 if(!par.eraseChar(cur.pos(), cur.buffer().params().trackChanges)) {
1184                         // the character has been logically deleted only => skip it
1185                         cur.forwardPosNoDescend();
1186                 }
1187                 checkBufferStructure(cur.buffer(), cur);
1188                 needsUpdate = true;
1189         } else {
1190                 if (cur.pit() == cur.lastpit())
1191                         return dissolveInset(cur);
1192
1193                 if (!par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1194                         par.setChange(cur.pos(), Change(Change::DELETED));
1195                         cur.forwardPos();
1196                         needsUpdate = true;
1197                 } else {
1198                         setCursorIntern(cur, cur.pit() + 1, 0);
1199                         needsUpdate = backspacePos0(cur);
1200                 }
1201         }
1202
1203         if (needsUpdate) {
1204                 // Make sure the cursor is correct. Is this really needed?
1205                 // No, not really... at least not here!
1206                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
1207                 checkBufferStructure(cur.buffer(), cur);
1208         }
1209
1210         return needsUpdate;
1211 }
1212
1213
1214 bool LyXText::backspacePos0(LCursor & cur)
1215 {
1216         BOOST_ASSERT(this == cur.text());
1217         if (cur.pit() == 0)
1218                 return false;
1219
1220         bool needsUpdate = false;
1221
1222         BufferParams const & bufparams = cur.buffer().params();
1223         LyXTextClass const & tclass = bufparams.getLyXTextClass();
1224         ParagraphList & plist = cur.text()->paragraphs();
1225         Paragraph const & par = cur.paragraph();
1226         LCursor prevcur = cur;
1227         --prevcur.pit();
1228         prevcur.pos() = prevcur.lastpos();
1229         Paragraph const & prevpar = prevcur.paragraph();
1230
1231         // is it an empty paragraph?
1232         if (cur.lastpos() == 0
1233             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1234                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1235                 plist.erase(boost::next(plist.begin(), cur.pit()));
1236                 needsUpdate = true;
1237         }
1238         // is previous par empty?
1239         else if (prevcur.lastpos() == 0
1240                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1241                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1242                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1243                 needsUpdate = true;
1244         }
1245         // Pasting is not allowed, if the paragraphs have different
1246         // layouts. I think it is a real bug of all other
1247         // word processors to allow it. It confuses the user.
1248         // Correction: Pasting is always allowed with standard-layout
1249         else if (par.layout() == prevpar.layout()
1250                  || par.layout() == tclass.defaultLayout()) {
1251                 recordUndo(cur, Undo::ATOMIC, prevcur.pit());
1252                 mergeParagraph(bufparams, plist, prevcur.pit());
1253                 needsUpdate = true;
1254         }
1255
1256         if (needsUpdate) {
1257                 updateLabels(cur.buffer());
1258                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1259         }
1260
1261         return needsUpdate;
1262 }
1263
1264
1265 bool LyXText::backspace(LCursor & cur)
1266 {
1267         BOOST_ASSERT(this == cur.text());
1268         bool needsUpdate = false;
1269         if (cur.pos() == 0) {
1270                 if (cur.pit() == 0)
1271                         return dissolveInset(cur);
1272
1273                 Paragraph & prev_par = pars_[cur.pit() - 1];
1274
1275                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1276                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1277                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1278                         return true;
1279                 }
1280                 // The cursor is at the beginning of a paragraph, so
1281                 // the backspace will collapse two paragraphs into one.
1282                 needsUpdate = backspacePos0(cur);
1283
1284         } else {
1285                 // this is the code for a normal backspace, not pasting
1286                 // any paragraphs
1287                 recordUndo(cur, Undo::DELETE);
1288                 // We used to do cursorLeftIntern() here, but it is
1289                 // not a good idea since it triggers the auto-delete
1290                 // mechanism. So we do a cursorLeftIntern()-lite,
1291                 // without the dreaded mechanism. (JMarc)
1292                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1293                                 false, cur.boundary());
1294                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1295                 checkBufferStructure(cur.buffer(), cur);
1296         }
1297
1298         if (cur.pos() == cur.lastpos())
1299                 setCurrentFont(cur);
1300
1301         // A singlePar update is not enough in this case.
1302 //              cur.updateFlags(Update::Force);
1303         setCursor(cur.top(), cur.pit(), cur.pos());
1304
1305         return needsUpdate;
1306 }
1307
1308
1309 bool LyXText::dissolveInset(LCursor & cur) {
1310         BOOST_ASSERT(this == cur.text());
1311
1312         if (isMainText(*cur.bv().buffer()) || cur.inset().nargs() != 1)
1313                 return false;
1314
1315         recordUndoInset(cur);
1316         cur.selHandle(false);
1317         // save position
1318         pos_type spos = cur.pos();
1319         pit_type spit = cur.pit();
1320         ParagraphList plist;
1321         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1322                 plist = paragraphs();
1323         cur.popLeft();
1324         // store cursor offset
1325         if (spit == 0)
1326                 spos += cur.pos();
1327         spit += cur.pit();
1328         Buffer & b = cur.buffer();
1329         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1330         if (!plist.empty()) {
1331                 // ERT paragraphs have the Language latex_language.
1332                 // This is invalid outside of ERT, so we need to
1333                 // change it to the buffer language.
1334                 ParagraphList::iterator it = plist.begin();
1335                 ParagraphList::iterator it_end = plist.end();
1336                 for (; it != it_end; it++) {
1337                         it->changeLanguage(b.params(), latex_language,
1338                                         b.getLanguage());
1339                 }
1340
1341                 pasteParagraphList(cur, plist, b.params().textclass,
1342                                    b.errorList("Paste"));
1343                 // restore position
1344                 cur.pit() = std::min(cur.lastpit(), spit);
1345                 cur.pos() = std::min(cur.lastpos(), spos);
1346         }
1347         cur.clearSelection();
1348         cur.resetAnchor();
1349         return true;
1350 }
1351
1352
1353 // only used for inset right now. should also be used for main text
1354 void LyXText::draw(PainterInfo & pi, int x, int y) const
1355 {
1356         paintTextInset(*this, pi, x, y);
1357 }
1358
1359
1360 // only used for inset right now. should also be used for main text
1361 void LyXText::drawSelection(PainterInfo & pi, int x, int) const
1362 {
1363         LCursor & cur = pi.base.bv->cursor();
1364         if (!cur.selection())
1365                 return;
1366         if (!ptr_cmp(cur.text(), this))
1367                 return;
1368
1369         LYXERR(Debug::DEBUG)
1370                 << BOOST_CURRENT_FUNCTION
1371                 << "draw selection at " << x
1372                 << endl;
1373
1374         DocIterator beg = cur.selectionBegin();
1375         DocIterator end = cur.selectionEnd();
1376
1377         BufferView & bv = *pi.base.bv;
1378         Buffer const & buffer = *bv.buffer();
1379
1380         // the selection doesn't touch the visible screen
1381         if (bv_funcs::status(&bv, beg) == bv_funcs::CUR_BELOW
1382             || bv_funcs::status(&bv, end) == bv_funcs::CUR_ABOVE)
1383                 return;
1384
1385         Paragraph const & par1 = pars_[beg.pit()];
1386         Paragraph const & par2 = pars_[end.pit()];
1387         TextMetrics const & tm = bv.textMetrics(this);
1388         ParagraphMetrics const & pm1 = tm.parMetrics(beg.pit());
1389         ParagraphMetrics const & pm2 = tm.parMetrics(end.pit());
1390
1391         bool const above = (bv_funcs::status(&bv, beg)
1392                             == bv_funcs::CUR_ABOVE);
1393         bool const below = (bv_funcs::status(&bv, end)
1394                             == bv_funcs::CUR_BELOW);
1395         int y1,y2,x1,x2;
1396         if (above) {
1397                 y1 = 0;
1398                 y2 = 0;
1399                 x1 = 0;
1400                 x2 = tm.width();
1401         } else {
1402                 Row const & row1 = pm1.getRow(beg.pos(), beg.boundary());
1403                 y1 = bv_funcs::getPos(bv, beg, beg.boundary()).y_ - row1.ascent();
1404                 y2 = y1 + row1.height();
1405                 int const startx = cursorX(bv, beg.top(), beg.boundary());
1406                 if (!isRTL(buffer, par1)) {
1407                         x1 = startx;
1408                         x2 = 0 + tm.width();
1409                 }
1410                 else {
1411                         x1 = 0;
1412                         x2 = startx;
1413                 }
1414         }
1415
1416         int Y1,Y2,X1,X2;
1417         if (below) {
1418                 Y1 = bv.workHeight();
1419                 Y2 = bv.workHeight();
1420                 X1 = 0;
1421                 X2 = tm.width();
1422         } else {
1423                 Row const & row2 = pm2.getRow(end.pos(), end.boundary());
1424                 Y1 = bv_funcs::getPos(bv, end, end.boundary()).y_ - row2.ascent();
1425                 Y2 = Y1 + row2.height();
1426                 int const endx = cursorX(bv, end.top(), end.boundary());
1427                 if (!isRTL(buffer, par2)) {
1428                         X1 = 0;
1429                         X2 = endx;
1430                 }
1431                 else {
1432                         X1 = endx;
1433                         X2 = 0 + tm.width();
1434                 }
1435         }
1436
1437         if (!above && !below && &pm1.getRow(beg.pos(), beg.boundary())
1438             == &pm2.getRow(end.pos(), end.boundary()))
1439         {
1440                 // paint only one rectangle
1441                 int const b( !isRTL(*bv.buffer(), par1) ? x + x1 : x + X1 );
1442                 int const w( !isRTL(*bv.buffer(), par1) ? X2 - x1 : x2 - X1 );
1443                 pi.pain.fillRectangle(b, y1, w, y2 - y1, LColor::selection);
1444                 return;
1445         }
1446
1447         if (lyxerr.debugging(Debug::DEBUG)) {
1448                 LYXERR(Debug::DEBUG) << " y1: " << y1 << " y2: " << y2
1449                            << "X1:" << X1 << " x2: " << X2 << " wid: " << tm.width()
1450                         << endl;
1451         }
1452
1453         // paint upper rectangle
1454         pi.pain.fillRectangle(x + x1, y1, x2 - x1, y2 - y1,
1455                                       LColor::selection);
1456         // paint bottom rectangle
1457         pi.pain.fillRectangle(x + X1, Y1, X2 - X1, Y2 - Y1,
1458                                       LColor::selection);
1459         // paint center rectangle
1460         pi.pain.fillRectangle(x, y2, tm.width(),
1461                               Y1 - y2, LColor::selection);
1462 }
1463
1464
1465 bool LyXText::isLastRow(pit_type pit, Row const & row) const
1466 {
1467         return row.endpos() >= pars_[pit].size()
1468                 && pit + 1 == pit_type(paragraphs().size());
1469 }
1470
1471
1472 bool LyXText::isFirstRow(pit_type pit, Row const & row) const
1473 {
1474         return row.pos() == 0 && pit == 0;
1475 }
1476
1477
1478 void LyXText::getWord(CursorSlice & from, CursorSlice & to,
1479         word_location const loc)
1480 {
1481         Paragraph const & from_par = pars_[from.pit()];
1482         switch (loc) {
1483         case WHOLE_WORD_STRICT:
1484                 if (from.pos() == 0 || from.pos() == from_par.size()
1485                     || !from_par.isLetter(from.pos())
1486                     || !from_par.isLetter(from.pos() - 1)) {
1487                         to = from;
1488                         return;
1489                 }
1490                 // no break here, we go to the next
1491
1492         case WHOLE_WORD:
1493                 // If we are already at the beginning of a word, do nothing
1494                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1495                         break;
1496                 // no break here, we go to the next
1497
1498         case PREVIOUS_WORD:
1499                 // always move the cursor to the beginning of previous word
1500                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1501                         --from.pos();
1502                 break;
1503         case NEXT_WORD:
1504                 lyxerr << "LyXText::getWord: NEXT_WORD not implemented yet"
1505                        << endl;
1506                 break;
1507         case PARTIAL_WORD:
1508                 // no need to move the 'from' cursor
1509                 break;
1510         }
1511         to = from;
1512         Paragraph & to_par = pars_[to.pit()];
1513         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1514                 ++to.pos();
1515 }
1516
1517
1518 void LyXText::write(Buffer const & buf, std::ostream & os) const
1519 {
1520         ParagraphList::const_iterator pit = paragraphs().begin();
1521         ParagraphList::const_iterator end = paragraphs().end();
1522         depth_type dth = 0;
1523         for (; pit != end; ++pit)
1524                 pit->write(buf, os, buf.params(), dth);
1525 }
1526
1527
1528 bool LyXText::read(Buffer const & buf, LyXLex & lex, ErrorList & errorList)
1529 {
1530         depth_type depth = 0;
1531
1532         while (lex.isOK()) {
1533                 lex.nextToken();
1534                 string const token = lex.getString();
1535
1536                 if (token.empty())
1537                         continue;
1538
1539                 if (token == "\\end_inset")
1540                         break;
1541
1542                 if (token == "\\end_body")
1543                         continue;
1544
1545                 if (token == "\\begin_body")
1546                         continue;
1547
1548                 if (token == "\\end_document")
1549                         return false;
1550
1551                 if (token == "\\begin_layout") {
1552                         lex.pushToken(token);
1553
1554                         Paragraph par;
1555                         par.params().depth(depth);
1556                         par.setFont(0, LyXFont(LyXFont::ALL_INHERIT, buf.params().language));
1557                         pars_.push_back(par);
1558
1559                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1560                         // not BufferParams
1561                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
1562
1563                 } else if (token == "\\begin_deeper") {
1564                         ++depth;
1565                 } else if (token == "\\end_deeper") {
1566                         if (!depth) {
1567                                 lex.printError("\\end_deeper: " "depth is already null");
1568                         } else {
1569                                 --depth;
1570                         }
1571                 } else {
1572                         lyxerr << "Handling unknown body token: `"
1573                                << token << '\'' << endl;
1574                 }
1575         }
1576         return true;
1577 }
1578
1579 int LyXText::cursorX(BufferView const & bv, CursorSlice const & sl,
1580                 bool boundary) const
1581 {
1582         TextMetrics const & tm = bv.textMetrics(sl.text());
1583         pit_type const pit = sl.pit();
1584         Paragraph const & par = pars_[pit];
1585         ParagraphMetrics const & pm = tm.parMetrics(pit);
1586         if (pm.rows().empty())
1587                 return 0;
1588
1589         pos_type ppos = sl.pos();
1590         // Correct position in front of big insets
1591         bool const boundary_correction = ppos != 0 && boundary;
1592         if (boundary_correction)
1593                 --ppos;
1594
1595         Row const & row = pm.getRow(sl.pos(), boundary);
1596
1597         pos_type cursor_vpos = 0;
1598
1599         Buffer const & buffer = *bv.buffer();
1600         RowMetrics const m = tm.computeRowMetrics(pit, row);
1601         double x = m.x;
1602
1603         pos_type const row_pos  = row.pos();
1604         pos_type const end      = row.endpos();
1605
1606         if (end <= row_pos)
1607                 cursor_vpos = row_pos;
1608         else if (ppos >= end)
1609                 cursor_vpos = isRTL(buffer, par) ? row_pos : end;
1610         else if (ppos > row_pos && ppos >= end)
1611                 // Place cursor after char at (logical) position pos - 1
1612                 cursor_vpos = (bidi.level(ppos - 1) % 2 == 0)
1613                         ? bidi.log2vis(ppos - 1) + 1 : bidi.log2vis(ppos - 1);
1614         else
1615                 // Place cursor before char at (logical) position ppos
1616                 cursor_vpos = (bidi.level(ppos) % 2 == 0)
1617                         ? bidi.log2vis(ppos) : bidi.log2vis(ppos) + 1;
1618
1619         pos_type body_pos = par.beginOfBody();
1620         if (body_pos > 0 &&
1621             (body_pos > end || !par.isLineSeparator(body_pos - 1)))
1622                 body_pos = 0;
1623
1624         // Use font span to speed things up, see below
1625         FontSpan font_span;
1626         LyXFont font;
1627         FontMetrics const & labelfm = theFontMetrics(
1628                 getLabelFont(buffer, par));
1629
1630         for (pos_type vpos = row_pos; vpos < cursor_vpos; ++vpos) {
1631                 pos_type pos = bidi.vis2log(vpos);
1632                 if (body_pos > 0 && pos == body_pos - 1) {
1633                         // FIXME UNICODE
1634                         docstring const lsep = from_utf8(par.layout()->labelsep);
1635                         x += m.label_hfill + labelfm.width(lsep);
1636                         if (par.isLineSeparator(body_pos - 1))
1637                                 x -= singleWidth(buffer, par, body_pos - 1);
1638                 }
1639
1640                 // Use font span to speed things up, see above
1641                 if (pos < font_span.first || pos > font_span.last) {
1642                         font_span = par.fontSpan(pos);
1643                         font = getFont(buffer, par, pos);
1644                 }
1645
1646                 x += singleWidth(par, pos, par.getChar(pos), font);
1647
1648                 if (par.hfillExpansion(row, pos))
1649                         x += (pos >= body_pos) ? m.hfill : m.label_hfill;
1650                 else if (par.isSeparator(pos) && pos >= body_pos)
1651                         x += m.separator;
1652         }
1653
1654         // see correction above
1655         if (boundary_correction)
1656                 if (getFont(buffer, par, ppos).isVisibleRightToLeft())
1657                         x -= singleWidth(buffer, par, ppos);
1658                 else
1659                         x += singleWidth(buffer, par, ppos);
1660
1661         // Make sure inside an inset we always count from the left
1662         // edge (bidi!) -- MV
1663         if (sl.pos() < par.size()) {
1664                 font = getFont(buffer, par, sl.pos());
1665                 if (!boundary && font.isVisibleRightToLeft()
1666                   && par.isInset(sl.pos()))
1667                         x -= par.getInset(sl.pos())->width();
1668         }
1669         return int(x);
1670 }
1671
1672
1673 int LyXText::cursorY(BufferView const & bv, CursorSlice const & sl, bool boundary) const
1674 {
1675         //lyxerr << "LyXText::cursorY: boundary: " << boundary << std::endl;
1676         ParagraphMetrics const & pm = bv.parMetrics(this, sl.pit());
1677         if (pm.rows().empty())
1678                 return 0;
1679
1680         int h = 0;
1681         h -= bv.parMetrics(this, 0).rows()[0].ascent();
1682         for (pit_type pit = 0; pit < sl.pit(); ++pit) {
1683                 h += bv.parMetrics(this, pit).height();
1684         }
1685         int pos = sl.pos();
1686         if (pos && boundary)
1687                 --pos;
1688         size_t const rend = pm.pos2row(pos);
1689         for (size_t rit = 0; rit != rend; ++rit)
1690                 h += pm.rows()[rit].height();
1691         h += pm.rows()[rend].ascent();
1692         return h;
1693 }
1694
1695
1696 // Returns the current font and depth as a message.
1697 docstring LyXText::currentState(LCursor & cur)
1698 {
1699         BOOST_ASSERT(this == cur.text());
1700         Buffer & buf = cur.buffer();
1701         Paragraph const & par = cur.paragraph();
1702         odocstringstream os;
1703
1704         if (buf.params().trackChanges)
1705                 os << _("[Change Tracking] ");
1706
1707         Change change = par.lookupChange(cur.pos());
1708
1709         if (change.type != Change::UNCHANGED) {
1710                 Author const & a = buf.params().authors().get(change.author);
1711                 os << _("Change: ") << a.name();
1712                 if (!a.email().empty())
1713                         os << " (" << a.email() << ")";
1714                 // FIXME ctime is english, we should translate that
1715                 os << _(" at ") << ctime(&change.changetime);
1716                 os << " : ";
1717         }
1718
1719         // I think we should only show changes from the default
1720         // font. (Asger)
1721         // No, from the document font (MV)
1722         LyXFont font = real_current_font;
1723         font.reduce(buf.params().getFont());
1724
1725         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1726
1727         // The paragraph depth
1728         int depth = cur.paragraph().getDepth();
1729         if (depth > 0)
1730                 os << bformat(_(", Depth: %1$d"), depth);
1731
1732         // The paragraph spacing, but only if different from
1733         // buffer spacing.
1734         Spacing const & spacing = par.params().spacing();
1735         if (!spacing.isDefault()) {
1736                 os << _(", Spacing: ");
1737                 switch (spacing.getSpace()) {
1738                 case Spacing::Single:
1739                         os << _("Single");
1740                         break;
1741                 case Spacing::Onehalf:
1742                         os << _("OneHalf");
1743                         break;
1744                 case Spacing::Double:
1745                         os << _("Double");
1746                         break;
1747                 case Spacing::Other:
1748                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1749                         break;
1750                 case Spacing::Default:
1751                         // should never happen, do nothing
1752                         break;
1753                 }
1754         }
1755
1756 #ifdef DEVEL_VERSION
1757         os << _(", Inset: ") << &cur.inset();
1758         os << _(", Paragraph: ") << cur.pit();
1759         os << _(", Id: ") << par.id();
1760         os << _(", Position: ") << cur.pos();
1761         // FIXME: Why is the check for par.size() needed?
1762         // We are called with cur.pos() == par.size() quite often.
1763         if (!par.empty() && cur.pos() < par.size()) {
1764                 // Force output of code point, not character
1765                 size_t const c = par.getChar(cur.pos());
1766                 os << _(", Char: 0x") << std::hex << c;
1767         }
1768         os << _(", Boundary: ") << cur.boundary();
1769 //      Row & row = cur.textRow();
1770 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1771 #endif
1772         return os.str();
1773 }
1774
1775
1776 docstring LyXText::getPossibleLabel(LCursor & cur) const
1777 {
1778         pit_type pit = cur.pit();
1779
1780         LyXLayout_ptr layout = pars_[pit].layout();
1781
1782         docstring text;
1783         docstring par_text = pars_[pit].asString(cur.buffer(), false);
1784         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1785                 if (par_text.empty())
1786                         break;
1787                 docstring head;
1788                 par_text = split(par_text, head, ' ');
1789                 // Is it legal to use spaces in labels ?
1790                 if (i > 0)
1791                         text += '-';
1792                 text += head;
1793         }
1794
1795         // No need for a prefix if the user said so.
1796         if (lyxrc.label_init_length <= 0)
1797                 return text;
1798
1799         // Will contain the label type.
1800         docstring name;
1801
1802         // For section, subsection, etc...
1803         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1804                 LyXLayout_ptr const & layout2 = pars_[pit - 1].layout();
1805                 if (layout2->latextype != LATEX_PARAGRAPH) {
1806                         --pit;
1807                         layout = layout2;
1808                 }
1809         }
1810         if (layout->latextype != LATEX_PARAGRAPH)
1811                 name = from_ascii(layout->latexname());
1812
1813         // for captions, we just take the caption type
1814         InsetBase * caption_inset = cur.innerInsetOfType(InsetBase::CAPTION_CODE);
1815         if (caption_inset)
1816                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1817
1818         // Inside floats or wraps, if none of the above worked
1819         // we want by default the abbreviation of the float type.
1820         if (name.empty()) {
1821                 InsetBase * float_inset = cur.innerInsetOfType(InsetBase::FLOAT_CODE);
1822                 if (!float_inset)
1823                         float_inset = cur.innerInsetOfType(InsetBase::WRAP_CODE);
1824                 if (float_inset)
1825                         name = float_inset->getInsetName();
1826         }
1827
1828         // Create a correct prefix for prettyref
1829         if (name == "theorem")
1830                 name = from_ascii("thm");
1831
1832         if (!name.empty())
1833                 text = name.substr(0, 3) + ':' + text;
1834
1835         return text;
1836 }
1837
1838
1839 void LyXText::setCursorFromCoordinates(LCursor & cur, int const x, int const y)
1840 {
1841         BOOST_ASSERT(this == cur.text());
1842         pit_type pit = getPitNearY(cur.bv(), y);
1843
1844         TextMetrics const & tm = cur.bv().textMetrics(this);
1845         ParagraphMetrics const & pm = tm.parMetrics(pit);
1846
1847         int yy = cur.bv().coordCache().get(this, pit).y_ - pm.ascent();
1848         LYXERR(Debug::DEBUG)
1849                 << BOOST_CURRENT_FUNCTION
1850                 << ": x: " << x
1851                 << " y: " << y
1852                 << " pit: " << pit
1853                 << " yy: " << yy << endl;
1854
1855         int r = 0;
1856         BOOST_ASSERT(pm.rows().size());
1857         for (; r < int(pm.rows().size()) - 1; ++r) {
1858                 Row const & row = pm.rows()[r];
1859                 if (int(yy + row.height()) > y)
1860                         break;
1861                 yy += row.height();
1862         }
1863
1864         Row const & row = pm.rows()[r];
1865
1866         LYXERR(Debug::DEBUG)
1867                 << BOOST_CURRENT_FUNCTION
1868                 << ": row " << r
1869                 << " from pos: " << row.pos()
1870                 << endl;
1871
1872         bool bound = false;
1873         int xx = x;
1874         pos_type const pos = row.pos()
1875                 + tm.getColumnNearX(pit, row, xx, bound);
1876
1877         LYXERR(Debug::DEBUG)
1878                 << BOOST_CURRENT_FUNCTION
1879                 << ": setting cursor pit: " << pit
1880                 << " pos: " << pos
1881                 << endl;
1882
1883         setCursor(cur, pit, pos, true, bound);
1884         // remember new position.
1885         cur.setTargetX();
1886 }
1887
1888
1889 void LyXText::charsTranspose(LCursor & cur)
1890 {
1891         BOOST_ASSERT(this == cur.text());
1892
1893         pos_type pos = cur.pos();
1894
1895         // If cursor is at beginning or end of paragraph, do nothing.
1896         if (pos == cur.lastpos() || pos == 0)
1897                 return;
1898
1899         Paragraph & par = cur.paragraph();
1900
1901         // Get the positions of the characters to be transposed.
1902         pos_type pos1 = pos - 1;
1903         pos_type pos2 = pos;
1904
1905         // In change tracking mode, ignore deleted characters.
1906         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1907                 ++pos2;
1908         if (pos2 == cur.lastpos())
1909                 return;
1910
1911         while (pos1 >= 0 && par.isDeleted(pos1))
1912                 --pos1;
1913         if (pos1 < 0)
1914                 return;
1915
1916         // Don't do anything if one of the "characters" is not regular text.
1917         if (par.isInset(pos1) || par.isInset(pos2))
1918                 return;
1919
1920         // Store the characters to be transposed (including font information).
1921         char_type char1 = par.getChar(pos1);
1922         LyXFont const font1 =
1923                 par.getFontSettings(cur.buffer().params(), pos1);
1924
1925         char_type char2 = par.getChar(pos2);
1926         LyXFont const font2 =
1927                 par.getFontSettings(cur.buffer().params(), pos2);
1928
1929         // And finally, we are ready to perform the transposition.
1930         // Track the changes if Change Tracking is enabled.
1931         bool const trackChanges = cur.buffer().params().trackChanges;
1932
1933         recordUndo(cur);
1934
1935         par.eraseChar(pos2, trackChanges);
1936         par.eraseChar(pos1, trackChanges);
1937         par.insertChar(pos1, char2, font2, trackChanges);
1938         par.insertChar(pos2, char1, font1, trackChanges);
1939
1940         checkBufferStructure(cur.buffer(), cur);
1941
1942         // After the transposition, move cursor to after the transposition.
1943         setCursor(cur, cur.pit(), pos2);
1944         cur.forwardPos();
1945 }
1946
1947
1948 } // namespace lyx