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 "DispatchResult.h"
  33 #include "Encoding.h"
  34 #include "ErrorList.h"
  35 #include "FuncRequest.h"
  36 #include "factory.h"
  37 #include "FontIterator.h"
  38 #include "Language.h"
  39 #include "Length.h"
  40 #include "Lexer.h"
  41 #include "LyXRC.h"
  42 #include "Paragraph.h"
  43 #include "paragraph_funcs.h"
  44 #include "ParagraphParameters.h"
  45 #include "TextClass.h"
  46 #include "TextMetrics.h"
  47 #include "VSpace.h"
  48 #include "WordLangTuple.h"
  49
  50 #include "insets/InsetText.h"
  51 #include "insets/InsetBibitem.h"
  52 #include "insets/InsetCaption.h"
  53 #include "insets/InsetHFill.h"
  54 #include "insets/InsetLine.h"
  55 #include "insets/InsetNewline.h"
  56 #include "insets/InsetNewpage.h"
  57 #include "insets/InsetOptArg.h"
  58 #include "insets/InsetSpace.h"
  59 #include "insets/InsetSpecialChar.h"
  60 #include "insets/InsetTabular.h"
  61
  62 #include "support/convert.h"
  63 #include "support/debug.h"
  64 #include "support/docstream.h"
  65 #include "support/gettext.h"
  66 #include "support/lstrings.h"
  67 #include "support/textutils.h"
  68
  69 #include <boost/next_prior.hpp>
  70
  71 #include <sstream>
  72
  73 using namespace std;
  74 using namespace lyx::support;
  75
  76 namespace lyx {
  77
  78 using cap::cutSelection;
  79 using cap::pasteParagraphList;
  80
  81 namespace {
  82
  83 void readParToken(Buffer const & buf, Paragraph & par, Lexer & lex,
  84         string const & token, Font & font, Change & change, ErrorList & errorList)
  85 {
  86         BufferParams const & bp = buf.params();
  87
  88         if (token[0] != '\\') {
  89                 docstring dstr = lex.getDocString();
  90                 par.appendString(dstr, font, change);
  91
  92         } else if (token == "\\begin_layout") {
  93                 lex.eatLine();
  94                 docstring layoutname = lex.getDocString();
  95
  96                 font = Font(inherit_font, bp.language);
  97                 change = Change(Change::UNCHANGED);
  98
  99                 TextClass const & tclass = bp.getTextClass();
 100
 101                 if (layoutname.empty())
 102                         layoutname = tclass.defaultLayoutName();
 103
 104                 if (par.forceEmptyLayout()) {
 105                         // in this case only the empty layout is allowed
 106                         layoutname = tclass.emptyLayoutName();
 107                 } else if (par.useEmptyLayout()) {
 108                         // in this case, default layout maps to empty layout
 109                         if (layoutname == tclass.defaultLayoutName())
 110                                 layoutname = tclass.emptyLayoutName();
 111                 } else {
 112                         // otherwise, the empty layout maps to the default
 113                         if (layoutname == tclass.emptyLayoutName())
 114                                 layoutname = tclass.defaultLayoutName();
 115                 }
 116
 117                 bool hasLayout = tclass.hasLayout(layoutname);
 118
 119                 if (!hasLayout) {
 120                         errorList.push_back(ErrorItem(_("Unknown layout"),
 121                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 122                         layoutname, from_utf8(tclass.name())), par.id(), 0, par.size()));
 123                         layoutname = par.useEmptyLayout() ?
 124                                         tclass.emptyLayoutName() :
 125                                         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                 LYXERR0("Solitary \\end_layout in line " << lex.getLineNo() << "\n"
 139                        << "Missing \\begin_layout ?");
 140         } else if (token == "\\end_inset") {
 141                 LYXERR0("Solitary \\end_inset in line " << lex.getLineNo() << "\n"
 142                        << "Missing \\begin_inset ?");
 143         } else if (token == "\\begin_inset") {
 144                 Inset * inset = readInset(lex, buf);
 145                 if (inset)
 146                         par.insertInset(par.size(), inset, font, change);
 147                 else {
 148                         lex.eatLine();
 149                         docstring line = lex.getDocString();
 150                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 151                                             par.id(), 0, par.size()));
 152                 }
 153         } else if (token == "\\family") {
 154                 lex.next();
 155                 setLyXFamily(lex.getString(), font.fontInfo());
 156         } else if (token == "\\series") {
 157                 lex.next();
 158                 setLyXSeries(lex.getString(), font.fontInfo());
 159         } else if (token == "\\shape") {
 160                 lex.next();
 161                 setLyXShape(lex.getString(), font.fontInfo());
 162         } else if (token == "\\size") {
 163                 lex.next();
 164                 setLyXSize(lex.getString(), font.fontInfo());
 165         } else if (token == "\\lang") {
 166                 lex.next();
 167                 string const tok = lex.getString();
 168                 Language const * lang = languages.getLanguage(tok);
 169                 if (lang) {
 170                         font.setLanguage(lang);
 171                 } else {
 172                         font.setLanguage(bp.language);
 173                         lex.printError("Unknown language `$$Token'");
 174                 }
 175         } else if (token == "\\numeric") {
 176                 lex.next();
 177                 font.fontInfo().setNumber(font.setLyXMisc(lex.getString()));
 178         } else if (token == "\\emph") {
 179                 lex.next();
 180                 font.fontInfo().setEmph(font.setLyXMisc(lex.getString()));
 181         } else if (token == "\\bar") {
 182                 lex.next();
 183                 string const tok = lex.getString();
 184
 185                 if (tok == "under")
 186                         font.fontInfo().setUnderbar(FONT_ON);
 187                 else if (tok == "no")
 188                         font.fontInfo().setUnderbar(FONT_OFF);
 189                 else if (tok == "default")
 190                         font.fontInfo().setUnderbar(FONT_INHERIT);
 191                 else
 192                         lex.printError("Unknown bar font flag "
 193                                        "`$$Token'");
 194         } else if (token == "\\noun") {
 195                 lex.next();
 196                 font.fontInfo().setNoun(font.setLyXMisc(lex.getString()));
 197         } else if (token == "\\color") {
 198                 lex.next();
 199                 setLyXColor(lex.getString(), font.fontInfo());
 200         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 201
 202                 // Insets don't make sense in a free-spacing context! ---Kayvan
 203                 if (par.isFreeSpacing()) {
 204                         if (token == "\\InsetSpace")
 205                                 par.appendChar(' ', font, change);
 206                         else if (lex.isOK()) {
 207                                 lex.next();
 208                                 string const next_token = lex.getString();
 209                                 if (next_token == "\\-")
 210                                         par.appendChar('-', font, change);
 211                                 else {
 212                                         lex.printError("Token `$$Token' "
 213                                                        "is in free space "
 214                                                        "paragraph layout!");
 215                                 }
 216                         }
 217                 } else {
 218                         auto_ptr<Inset> inset;
 219                         if (token == "\\SpecialChar" )
 220                                 inset.reset(new InsetSpecialChar);
 221                         else
 222                                 inset.reset(new InsetSpace);
 223                         inset->read(buf, lex);
 224                         par.insertInset(par.size(), inset.release(),
 225                                         font, change);
 226                 }
 227         } else if (token == "\\backslash") {
 228                 par.appendChar('\\', font, change);
 229         } else if (token == "\\linebreak") {
 230                 auto_ptr<Inset> inset(new InsetLinebreak);
 231                 inset->read(buf, lex);
 232                 par.insertInset(par.size(), inset.release(), 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 InsetNewpage, font, change);
 247         } else if (token == "\\pagebreak") {
 248                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 249         } else if (token == "\\clearpage") {
 250                 par.insertInset(par.size(), new InsetClearPage, font, change);
 251         } else if (token == "\\cleardoublepage") {
 252                 par.insertInset(par.size(), new InsetClearDoublePage, font, change);
 253         } else if (token == "\\change_unchanged") {
 254                 change = Change(Change::UNCHANGED);
 255         } else if (token == "\\change_inserted") {
 256                 lex.eatLine();
 257                 istringstream is(lex.getString());
 258                 unsigned int aid;
 259                 time_t ct;
 260                 is >> aid >> ct;
 261                 if (aid >= bp.author_map.size()) {
 262                         errorList.push_back(ErrorItem(_("Change tracking error"),
 263                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 264                                             par.id(), 0, par.size()));
 265                         change = Change(Change::UNCHANGED);
 266                 } else
 267                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 268         } else if (token == "\\change_deleted") {
 269                 lex.eatLine();
 270                 istringstream is(lex.getString());
 271                 unsigned int aid;
 272                 time_t ct;
 273                 is >> aid >> ct;
 274                 if (aid >= bp.author_map.size()) {
 275                         errorList.push_back(ErrorItem(_("Change tracking error"),
 276                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 277                                             par.id(), 0, par.size()));
 278                         change = Change(Change::UNCHANGED);
 279                 } else
 280                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 281         } else {
 282                 lex.eatLine();
 283                 errorList.push_back(ErrorItem(_("Unknown token"),
 284                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 285                         lex.getDocString()),
 286                         par.id(), 0, par.size()));
 287         }
 288 }
 289
 290
 291 void readParagraph(Buffer const & buf, Paragraph & par, Lexer & lex,
 292         ErrorList & errorList)
 293 {
 294         lex.nextToken();
 295         string token = lex.getString();
 296         Font font;
 297         Change change(Change::UNCHANGED);
 298
 299         while (lex.isOK()) {
 300                 readParToken(buf, par, lex, token, font, change, errorList);
 301
 302                 lex.nextToken();
 303                 token = lex.getString();
 304
 305                 if (token.empty())
 306                         continue;
 307
 308                 if (token == "\\end_layout") {
 309                         //Ok, paragraph finished
 310                         break;
 311                 }
 312
 313                 LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
 314                 if (token == "\\begin_layout" || token == "\\end_document"
 315                     || token == "\\end_inset" || token == "\\begin_deeper"
 316                     || token == "\\end_deeper") {
 317                         lex.pushToken(token);
 318                         lyxerr << "Paragraph ended in line "
 319                                << lex.getLineNo() << "\n"
 320                                << "Missing \\end_layout.\n";
 321                         break;
 322                 }
 323         }
 324         // Final change goes to paragraph break:
 325         par.setChange(par.size(), change);
 326
 327         // Initialize begin_of_body_ on load; redoParagraph maintains
 328         par.setBeginOfBody();
 329 }
 330
 331
 332 } // namespace anon
 333
 334
 335 bool Text::empty() const
 336 {
 337         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 338                 // FIXME: Should we consider the labeled type as empty too?
 339                 && pars_[0].layout()->labeltype == LABEL_NO_LABEL);
 340 }
 341
 342
 343 double Text::spacing(Buffer const & buffer,
 344                 Paragraph const & par) const
 345 {
 346         if (par.params().spacing().isDefault())
 347                 return buffer.params().spacing().getValue();
 348         return par.params().spacing().getValue();
 349 }
 350
 351
 352 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 353 {
 354         BOOST_ASSERT(this == cur.text());
 355
 356         Paragraph & cpar = cur.paragraph();
 357         pit_type cpit = cur.pit();
 358
 359         TextClass const & tclass = cur.buffer().params().getTextClass();
 360         LayoutPtr const & layout = cpar.layout();
 361
 362         // this is only allowed, if the current paragraph is not empty
 363         // or caption and if it has not the keepempty flag active
 364         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 365             layout->labeltype != LABEL_SENSITIVE)
 366                 return;
 367
 368         // a layout change may affect also the following paragraph
 369         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 370
 371         // Always break behind a space
 372         // It is better to erase the space (Dekel)
 373         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 374                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
 375
 376         // What should the layout for the new paragraph be?
 377         bool keep_layout = inverse_logic ?
 378                 !layout->isEnvironment()
 379                 : layout->isEnvironment();
 380
 381         // We need to remember this before we break the paragraph, because
 382         // that invalidates the layout variable
 383         bool sensitive = layout->labeltype == LABEL_SENSITIVE;
 384
 385         // we need to set this before we insert the paragraph.
 386         bool const isempty = cpar.allowEmpty() && cpar.empty();
 387
 388         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
 389                          cur.pos(), keep_layout);
 390
 391         // After this, neither paragraph contains any rows!
 392
 393         cpit = cur.pit();
 394         pit_type next_par = cpit + 1;
 395
 396         // well this is the caption hack since one caption is really enough
 397         if (sensitive) {
 398                 if (cur.pos() == 0)
 399                         // set to standard-layout
 400                 //FIXME Check if this should be emptyLayout() in some cases
 401                         pars_[cpit].applyLayout(tclass.defaultLayout());
 402                 else
 403                         // set to standard-layout
 404                         //FIXME Check if this should be emptyLayout() in some cases
 405                         pars_[next_par].applyLayout(tclass.defaultLayout());
 406         }
 407
 408         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 409                 if (!pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges))
 410                         break; // the character couldn't be deleted physically due to change tracking
 411         }
 412
 413         updateLabels(cur.buffer());
 414
 415         // A singlePar update is not enough in this case.
 416         cur.updateFlags(Update::Force);
 417
 418         // This check is necessary. Otherwise the new empty paragraph will
 419         // be deleted automatically. And it is more friendly for the user!
 420         if (cur.pos() != 0 || isempty)
 421                 setCursor(cur, cur.pit() + 1, 0);
 422         else
 423                 setCursor(cur, cur.pit(), 0);
 424 }
 425
 426
 427 // insert a character, moves all the following breaks in the
 428 // same Paragraph one to the right and make a rebreak
 429 void Text::insertChar(Cursor & cur, char_type c)
 430 {
 431         BOOST_ASSERT(this == cur.text());
 432
 433         cur.recordUndo(INSERT_UNDO);
 434
 435         TextMetrics const & tm = cur.bv().textMetrics(this);
 436         Buffer const & buffer = cur.buffer();
 437         Paragraph & par = cur.paragraph();
 438         // try to remove this
 439         pit_type const pit = cur.pit();
 440
 441         bool const freeSpacing = par.layout()->free_spacing ||
 442                 par.isFreeSpacing();
 443
 444         if (lyxrc.auto_number) {
 445                 static docstring const number_operators = from_ascii("+-/*");
 446                 static docstring const number_unary_operators = from_ascii("+-");
 447                 static docstring const number_seperators = from_ascii(".,:");
 448
 449                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 450                         if (!isDigit(c) && !contains(number_operators, c) &&
 451                             !(contains(number_seperators, c) &&
 452                               cur.pos() != 0 &&
 453                               cur.pos() != cur.lastpos() &&
 454                               tm.getDisplayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 455                               tm.getDisplayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 456                            )
 457                                 number(cur); // Set current_font.number to OFF
 458                 } else if (isDigit(c) &&
 459                            cur.real_current_font.isVisibleRightToLeft()) {
 460                         number(cur); // Set current_font.number to ON
 461
 462                         if (cur.pos() != 0) {
 463                                 char_type const c = par.getChar(cur.pos() - 1);
 464                                 if (contains(number_unary_operators, c) &&
 465                                     (cur.pos() == 1
 466                                      || par.isSeparator(cur.pos() - 2)
 467                                      || par.isNewline(cur.pos() - 2))
 468                                   ) {
 469                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 470                                                 tm.font_);
 471                                 } else if (contains(number_seperators, c)
 472                                      && cur.pos() >= 2
 473                                      && tm.getDisplayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 474                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 475                                                 tm.font_);
 476                                 }
 477                         }
 478                 }
 479         }
 480
 481         // In Bidi text, we want spaces to be treated in a special way: spaces
 482         // which are between words in different languages should get the
 483         // paragraph's language; otherwise, spaces should keep the language
 484         // they were originally typed in. This is only in effect while typing;
 485         // after the text is already typed in, the user can always go back and
 486         // explicitly set the language of a space as desired. But 99.9% of the
 487         // time, what we're doing here is what the user actually meant.
 488         //
 489         // The following cases are the ones in which the language of the space
 490         // should be changed to match that of the containing paragraph. In the
 491         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 492         // represents a space, pipe (|) represents the cursor position (so the
 493         // character before it is the one just typed in). The different cases
 494         // are depicted logically (not visually), from left to right:
 495         //
 496         // 1. A_a|
 497         // 2. a_A|
 498         //
 499         // Theoretically, there are other situations that we should, perhaps, deal
 500         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 501         // point (to understand why, just try to create this situation...).
 502
 503         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 504                 // get font in front and behind the space in question. But do NOT
 505                 // use getFont(cur.pos()) because the character c is not inserted yet
 506                 Font const pre_space_font  = tm.getDisplayFont(cur.pit(), cur.pos() - 2);
 507                 Font const & post_space_font = cur.real_current_font;
 508                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 509                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 510
 511                 if (pre_space_rtl != post_space_rtl) {
 512                         // Set the space's language to match the language of the
 513                         // adjacent character whose direction is the paragraph's
 514                         // direction; don't touch other properties of the font
 515                         Language const * lang =
 516                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 517                                 pre_space_font.language() : post_space_font.language();
 518
 519                         Font space_font = tm.getDisplayFont(cur.pit(), cur.pos() - 1);
 520                         space_font.setLanguage(lang);
 521                         par.setFont(cur.pos() - 1, space_font);
 522                 }
 523         }
 524
 525         // Next check, if there will be two blanks together or a blank at
 526         // the beginning of a paragraph.
 527         // I decided to handle blanks like normal characters, the main
 528         // difference are the special checks when calculating the row.fill
 529         // (blank does not count at the end of a row) and the check here
 530
 531         // When the free-spacing option is set for the current layout,
 532         // disable the double-space checking
 533         if (!freeSpacing && isLineSeparatorChar(c)) {
 534                 if (cur.pos() == 0) {
 535                         static bool sent_space_message = false;
 536                         if (!sent_space_message) {
 537                                 cur.message(_("You cannot insert a space at the "
 538                                                            "beginning of a paragraph. Please read the Tutorial."));
 539                                 sent_space_message = true;
 540                         }
 541                         return;
 542                 }
 543                 BOOST_ASSERT(cur.pos() > 0);
 544                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 545                     && !par.isDeleted(cur.pos() - 1)) {
 546                         static bool sent_space_message = false;
 547                         if (!sent_space_message) {
 548                                 cur.message(_("You cannot type two spaces this way. "
 549                                                            "Please read the Tutorial."));
 550                                 sent_space_message = true;
 551                         }
 552                         return;
 553                 }
 554         }
 555
 556         par.insertChar(cur.pos(), c, cur.current_font, cur.buffer().params().trackChanges);
 557         cur.checkBufferStructure();
 558
 559 //              cur.updateFlags(Update::Force);
 560         setCursor(cur.top(), cur.pit(), cur.pos() + 1);
 561         charInserted(cur);
 562 }
 563
 564
 565 void Text::charInserted(Cursor & cur)
 566 {
 567         // Here we call finishUndo for every 20 characters inserted.
 568         // This is from my experience how emacs does it. (Lgb)
 569         static unsigned int counter;
 570         if (counter < 20) {
 571                 ++counter;
 572         } else {
 573                 cur.finishUndo();
 574                 counter = 0;
 575         }
 576 }
 577
 578
 579 // the cursor set functions have a special mechanism. When they
 580 // realize, that you left an empty paragraph, they will delete it.
 581
 582 bool Text::cursorForwardOneWord(Cursor & cur)
 583 {
 584         BOOST_ASSERT(this == cur.text());
 585
 586         Cursor old = cur;
 587
 588         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
 589                 ++old.pit();
 590                 old.pos() = 0;
 591         } else {
 592                 // Advance through word.
 593                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
 594                         ++old.pos();
 595                 // Skip through trailing nonword stuff.
 596                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
 597                         ++old.pos();
 598         }
 599         return setCursor(cur, old.pit(), old.pos());
 600 }
 601
 602
 603 bool Text::cursorBackwardOneWord(Cursor & cur)
 604 {
 605         BOOST_ASSERT(this == cur.text());
 606
 607         Cursor old = cur;
 608
 609         if (old.pos() == 0 && old.pit() != 0) {
 610                 --old.pit();
 611                 old.pos() = old.lastpos();
 612         } else {
 613                 // Skip through initial nonword stuff.
 614                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
 615                         --old.pos();
 616                 // Advance through word.
 617                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
 618                         --old.pos();
 619         }
 620         return setCursor(cur, old.pit(), old.pos());
 621 }
 622
 623
 624 void Text::selectWord(Cursor & cur, word_location loc)
 625 {
 626         BOOST_ASSERT(this == cur.text());
 627         CursorSlice from = cur.top();
 628         CursorSlice to = cur.top();
 629         getWord(from, to, loc);
 630         if (cur.top() != from)
 631                 setCursor(cur, from.pit(), from.pos());
 632         if (to == from)
 633                 return;
 634         cur.resetAnchor();
 635         setCursor(cur, to.pit(), to.pos());
 636         cur.setSelection();
 637 }
 638
 639
 640 // Select the word currently under the cursor when no
 641 // selection is currently set
 642 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
 643 {
 644         BOOST_ASSERT(this == cur.text());
 645         if (cur.selection())
 646                 return false;
 647         selectWord(cur, loc);
 648         return cur.selection();
 649 }
 650
 651
 652 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
 653 {
 654         BOOST_ASSERT(this == cur.text());
 655
 656         if (!cur.selection())
 657                 return;
 658
 659         cur.recordUndoSelection();
 660
 661         pit_type begPit = cur.selectionBegin().pit();
 662         pit_type endPit = cur.selectionEnd().pit();
 663
 664         pos_type begPos = cur.selectionBegin().pos();
 665         pos_type endPos = cur.selectionEnd().pos();
 666
 667         // keep selection info, because endPos becomes invalid after the first loop
 668         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
 669
 670         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
 671
 672         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 673                 pos_type parSize = pars_[pit].size();
 674
 675                 // ignore empty paragraphs; otherwise, an assertion will fail for
 676                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
 677                 if (parSize == 0)
 678                         continue;
 679
 680                 // do not consider first paragraph if the cursor starts at pos size()
 681                 if (pit == begPit && begPos == parSize)
 682                         continue;
 683
 684                 // do not consider last paragraph if the cursor ends at pos 0
 685                 if (pit == endPit && endPos == 0)
 686                         break; // last iteration anyway
 687
 688                 pos_type left  = (pit == begPit ? begPos : 0);
 689                 pos_type right = (pit == endPit ? endPos : parSize);
 690
 691                 if (op == ACCEPT) {
 692                         pars_[pit].acceptChanges(cur.buffer().params(), left, right);
 693                 } else {
 694                         pars_[pit].rejectChanges(cur.buffer().params(), left, right);
 695                 }
 696         }
 697
 698         // next, accept/reject imaginary end-of-par characters
 699
 700         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 701                 pos_type pos = pars_[pit].size();
 702
 703                 // skip if the selection ends before the end-of-par
 704                 if (pit == endPit && endsBeforeEndOfPar)
 705                         break; // last iteration anyway
 706
 707                 // skip if this is not the last paragraph of the document
 708                 // note: the user should be able to accept/reject the par break of the last par!
 709                 if (pit == endPit && pit + 1 != int(pars_.size()))
 710                         break; // last iteration anway
 711
 712                 if (op == ACCEPT) {
 713                         if (pars_[pit].isInserted(pos)) {
 714                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 715                         } else if (pars_[pit].isDeleted(pos)) {
 716                                 if (pit + 1 == int(pars_.size())) {
 717                                         // we cannot remove a par break at the end of the last paragraph;
 718                                         // instead, we mark it unchanged
 719                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 720                                 } else {
 721                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 722                                         --endPit;
 723                                         --pit;
 724                                 }
 725                         }
 726                 } else {
 727                         if (pars_[pit].isDeleted(pos)) {
 728                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 729                         } else if (pars_[pit].isInserted(pos)) {
 730                                 if (pit + 1 == int(pars_.size())) {
 731                                         // we mark the par break at the end of the last paragraph unchanged
 732                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 733                                 } else {
 734                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 735                                         --endPit;
 736                                         --pit;
 737                                 }
 738                         }
 739                 }
 740         }
 741
 742         // finally, invoke the DEPM
 743
 744         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer().params().trackChanges);
 745
 746         //
 747
 748         cur.finishUndo();
 749         cur.clearSelection();
 750         setCursorIntern(cur, begPit, begPos);
 751         cur.updateFlags(Update::Force);
 752         updateLabels(cur.buffer());
 753 }
 754
 755
 756 void Text::acceptChanges(BufferParams const & bparams)
 757 {
 758         lyx::acceptChanges(pars_, bparams);
 759         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
 760 }
 761
 762
 763 void Text::rejectChanges(BufferParams const & bparams)
 764 {
 765         pit_type pars_size = static_cast<pit_type>(pars_.size());
 766
 767         // first, reject changes within each individual paragraph
 768         // (do not consider end-of-par)
 769         for (pit_type pit = 0; pit < pars_size; ++pit) {
 770                 if (!pars_[pit].empty())   // prevent assertion failure
 771                         pars_[pit].rejectChanges(bparams, 0, pars_[pit].size());
 772         }
 773
 774         // next, reject imaginary end-of-par characters
 775         for (pit_type pit = 0; pit < pars_size; ++pit) {
 776                 pos_type pos = pars_[pit].size();
 777
 778                 if (pars_[pit].isDeleted(pos)) {
 779                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 780                 } else if (pars_[pit].isInserted(pos)) {
 781                         if (pit == pars_size - 1) {
 782                                 // we mark the par break at the end of the last
 783                                 // paragraph unchanged
 784                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 785                         } else {
 786                                 mergeParagraph(bparams, pars_, pit);
 787                                 --pit;
 788                                 --pars_size;
 789                         }
 790                 }
 791         }
 792
 793         // finally, invoke the DEPM
 794         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
 795 }
 796
 797
 798 void Text::deleteWordForward(Cursor & cur)
 799 {
 800         BOOST_ASSERT(this == cur.text());
 801         if (cur.lastpos() == 0)
 802                 cursorForward(cur);
 803         else {
 804                 cur.resetAnchor();
 805                 cur.selection() = true;
 806                 cursorForwardOneWord(cur);
 807                 cur.setSelection();
 808                 cutSelection(cur, true, false);
 809                 cur.checkBufferStructure();
 810         }
 811 }
 812
 813
 814 void Text::deleteWordBackward(Cursor & cur)
 815 {
 816         BOOST_ASSERT(this == cur.text());
 817         if (cur.lastpos() == 0)
 818                 cursorBackward(cur);
 819         else {
 820                 cur.resetAnchor();
 821                 cur.selection() = true;
 822                 cursorBackwardOneWord(cur);
 823                 cur.setSelection();
 824                 cutSelection(cur, true, false);
 825                 cur.checkBufferStructure();
 826         }
 827 }
 828
 829
 830 // Kill to end of line.
 831 void Text::changeCase(Cursor & cur, TextCase action)
 832 {
 833         BOOST_ASSERT(this == cur.text());
 834         CursorSlice from;
 835         CursorSlice to;
 836
 837         bool gotsel = false;
 838         if (cur.selection()) {
 839                 from = cur.selBegin();
 840                 to = cur.selEnd();
 841                 gotsel = true;
 842         } else {
 843                 from = cur.top();
 844                 getWord(from, to, PARTIAL_WORD);
 845                 cursorForwardOneWord(cur);
 846         }
 847
 848         cur.recordUndoSelection();
 849
 850         pit_type begPit = from.pit();
 851         pit_type endPit = to.pit();
 852
 853         pos_type begPos = from.pos();
 854         pos_type endPos = to.pos();
 855
 856         pos_type right = 0; // needed after the for loop
 857
 858         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 859                 Paragraph & par = pars_[pit];
 860                 pos_type const pos = (pit == begPit ? begPos : 0);
 861                 right = (pit == endPit ? endPos : par.size());
 862                 par.changeCase(cur.buffer().params(), pos, right, action);
 863         }
 864
 865         // the selection may have changed due to logically-only deleted chars
 866         if (gotsel) {
 867                 setCursor(cur, begPit, begPos);
 868                 cur.resetAnchor();
 869                 setCursor(cur, endPit, right);
 870                 cur.setSelection();
 871         } else
 872                 setCursor(cur, endPit, right);
 873
 874         cur.checkBufferStructure();
 875 }
 876
 877
 878 bool Text::handleBibitems(Cursor & cur)
 879 {
 880         if (cur.paragraph().layout()->labeltype != LABEL_BIBLIO)
 881                 return false;
 882
 883         if (cur.pos() != 0)
 884                 return false;
 885
 886         BufferParams const & bufparams = cur.buffer().params();
 887         Paragraph const & par = cur.paragraph();
 888         Cursor prevcur = cur;
 889         if (cur.pit() > 0) {
 890                 --prevcur.pit();
 891                 prevcur.pos() = prevcur.lastpos();
 892         }
 893         Paragraph const & prevpar = prevcur.paragraph();
 894
 895         // if a bibitem is deleted, merge with previous paragraph
 896         // if this is a bibliography item as well
 897         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
 898                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
 899                 mergeParagraph(bufparams, cur.text()->paragraphs(),
 900                                                         prevcur.pit());
 901                 updateLabels(cur.buffer());
 902                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
 903                 cur.updateFlags(Update::Force);
 904                 return true;
 905         }
 906
 907         // otherwise reset to default
 908         if (par.useEmptyLayout())
 909                 cur.paragraph().layout(bufparams.getTextClass().emptyLayout());
 910         else
 911                 cur.paragraph().layout(bufparams.getTextClass().defaultLayout());
 912         return true;
 913 }
 914
 915
 916 bool Text::erase(Cursor & cur)
 917 {
 918         BOOST_ASSERT(this == cur.text());
 919         bool needsUpdate = false;
 920         Paragraph & par = cur.paragraph();
 921
 922         if (cur.pos() != cur.lastpos()) {
 923                 // this is the code for a normal delete, not pasting
 924                 // any paragraphs
 925                 cur.recordUndo(DELETE_UNDO);
 926                 bool const was_inset = cur.paragraph().isInset(cur.pos());
 927                 if(!par.eraseChar(cur.pos(), cur.buffer().params().trackChanges))
 928                         // the character has been logically deleted only => skip it
 929                         cur.top().forwardPos();
 930
 931                 if (was_inset)
 932                         updateLabels(cur.buffer());
 933                 else
 934                         cur.checkBufferStructure();
 935                 needsUpdate = true;
 936         } else {
 937                 if (cur.pit() == cur.lastpit())
 938                         return dissolveInset(cur);
 939
 940                 if (!par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
 941                         par.setChange(cur.pos(), Change(Change::DELETED));
 942                         cur.forwardPos();
 943                         needsUpdate = true;
 944                 } else {
 945                         setCursorIntern(cur, cur.pit() + 1, 0);
 946                         needsUpdate = backspacePos0(cur);
 947                 }
 948         }
 949
 950         needsUpdate |= handleBibitems(cur);
 951
 952         if (needsUpdate) {
 953                 // Make sure the cursor is correct. Is this really needed?
 954                 // No, not really... at least not here!
 955                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
 956                 cur.checkBufferStructure();
 957         }
 958
 959         return needsUpdate;
 960 }
 961
 962
 963 bool Text::backspacePos0(Cursor & cur)
 964 {
 965         BOOST_ASSERT(this == cur.text());
 966         if (cur.pit() == 0)
 967                 return false;
 968
 969         bool needsUpdate = false;
 970
 971         BufferParams const & bufparams = cur.buffer().params();
 972         TextClass const & tclass = bufparams.getTextClass();
 973         ParagraphList & plist = cur.text()->paragraphs();
 974         Paragraph const & par = cur.paragraph();
 975         Cursor prevcur = cur;
 976         --prevcur.pit();
 977         prevcur.pos() = prevcur.lastpos();
 978         Paragraph const & prevpar = prevcur.paragraph();
 979
 980         // is it an empty paragraph?
 981         if (cur.lastpos() == 0
 982             || (cur.lastpos() == 1 && par.isSeparator(0))) {
 983                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
 984                 plist.erase(boost::next(plist.begin(), cur.pit()));
 985                 needsUpdate = true;
 986         }
 987         // is previous par empty?
 988         else if (prevcur.lastpos() == 0
 989                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
 990                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
 991                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
 992                 needsUpdate = true;
 993         }
 994         // Pasting is not allowed, if the paragraphs have different
 995         // layouts. I think it is a real bug of all other
 996         // word processors to allow it. It confuses the user.
 997         // Correction: Pasting is always allowed with standard-layout
 998         // or the empty layout.
 999         else if (par.layout() == prevpar.layout()
1000                  || par.layout() == tclass.defaultLayout()
1001                  || par.layout() == tclass.emptyLayout()) {
1002                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1003                 mergeParagraph(bufparams, plist, prevcur.pit());
1004                 needsUpdate = true;
1005         }
1006
1007         if (needsUpdate) {
1008                 updateLabels(cur.buffer());
1009                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1010         }
1011
1012         return needsUpdate;
1013 }
1014
1015
1016 bool Text::backspace(Cursor & cur)
1017 {
1018         BOOST_ASSERT(this == cur.text());
1019         bool needsUpdate = false;
1020         if (cur.pos() == 0) {
1021                 if (cur.pit() == 0)
1022                         return dissolveInset(cur);
1023
1024                 Paragraph & prev_par = pars_[cur.pit() - 1];
1025
1026                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1027                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1028                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1029                         return true;
1030                 }
1031                 // The cursor is at the beginning of a paragraph, so
1032                 // the backspace will collapse two paragraphs into one.
1033                 needsUpdate = backspacePos0(cur);
1034
1035         } else {
1036                 // this is the code for a normal backspace, not pasting
1037                 // any paragraphs
1038                 cur.recordUndo(DELETE_UNDO);
1039                 // We used to do cursorBackwardIntern() here, but it is
1040                 // not a good idea since it triggers the auto-delete
1041                 // mechanism. So we do a cursorBackwardIntern()-lite,
1042                 // without the dreaded mechanism. (JMarc)
1043                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1044                                 false, cur.boundary());
1045                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1046                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1047                 if (was_inset)
1048                         updateLabels(cur.buffer());
1049                 else
1050                         cur.checkBufferStructure();
1051         }
1052
1053         if (cur.pos() == cur.lastpos())
1054                 cur.setCurrentFont();
1055
1056         needsUpdate |= handleBibitems(cur);
1057
1058         // A singlePar update is not enough in this case.
1059 //              cur.updateFlags(Update::Force);
1060         setCursor(cur.top(), cur.pit(), cur.pos());
1061
1062         return needsUpdate;
1063 }
1064
1065
1066 bool Text::dissolveInset(Cursor & cur) {
1067         BOOST_ASSERT(this == cur.text());
1068
1069         if (isMainText(cur.bv().buffer()) || cur.inset().nargs() != 1)
1070                 return false;
1071
1072         cur.recordUndoInset();
1073         cur.mark() = false;
1074         cur.selHandle(false);
1075         // save position
1076         pos_type spos = cur.pos();
1077         pit_type spit = cur.pit();
1078         ParagraphList plist;
1079         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1080                 plist = paragraphs();
1081         cur.popBackward();
1082         // store cursor offset
1083         if (spit == 0)
1084                 spos += cur.pos();
1085         spit += cur.pit();
1086         Buffer & b = cur.buffer();
1087         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1088         if (!plist.empty()) {
1089                 // ERT paragraphs have the Language latex_language.
1090                 // This is invalid outside of ERT, so we need to
1091                 // change it to the buffer language.
1092                 ParagraphList::iterator it = plist.begin();
1093                 ParagraphList::iterator it_end = plist.end();
1094                 for (; it != it_end; it++)
1095                         it->changeLanguage(b.params(), latex_language, b.language());
1096
1097                 pasteParagraphList(cur, plist, b.params().getTextClassPtr(),
1098                                    b.errorList("Paste"));
1099                 // restore position
1100                 cur.pit() = min(cur.lastpit(), spit);
1101                 cur.pos() = min(cur.lastpos(), spos);
1102         }
1103         cur.clearSelection();
1104         cur.resetAnchor();
1105         return true;
1106 }
1107
1108
1109 void Text::getWord(CursorSlice & from, CursorSlice & to,
1110         word_location const loc)
1111 {
1112         Paragraph const & from_par = pars_[from.pit()];
1113         switch (loc) {
1114         case WHOLE_WORD_STRICT:
1115                 if (from.pos() == 0 || from.pos() == from_par.size()
1116                     || !from_par.isLetter(from.pos())
1117                     || !from_par.isLetter(from.pos() - 1)) {
1118                         to = from;
1119                         return;
1120                 }
1121                 // no break here, we go to the next
1122
1123         case WHOLE_WORD:
1124                 // If we are already at the beginning of a word, do nothing
1125                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1126                         break;
1127                 // no break here, we go to the next
1128
1129         case PREVIOUS_WORD:
1130                 // always move the cursor to the beginning of previous word
1131                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1132                         --from.pos();
1133                 break;
1134         case NEXT_WORD:
1135                 LYXERR0("Text::getWord: NEXT_WORD not implemented yet");
1136                 break;
1137         case PARTIAL_WORD:
1138                 // no need to move the 'from' cursor
1139                 break;
1140         }
1141         to = from;
1142         Paragraph & to_par = pars_[to.pit()];
1143         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1144                 ++to.pos();
1145 }
1146
1147
1148 void Text::write(Buffer const & buf, ostream & os) const
1149 {
1150         ParagraphList::const_iterator pit = paragraphs().begin();
1151         ParagraphList::const_iterator end = paragraphs().end();
1152         depth_type dth = 0;
1153         for (; pit != end; ++pit)
1154                 pit->write(buf, os, buf.params(), dth);
1155
1156         // Close begin_deeper
1157         for(; dth > 0; --dth)
1158                 os << "\n\\end_deeper";
1159 }
1160
1161
1162 bool Text::read(Buffer const & buf, Lexer & lex,
1163                 ErrorList & errorList, Inset * insetPtr)
1164 {
1165         depth_type depth = 0;
1166
1167         while (lex.isOK()) {
1168                 lex.nextToken();
1169                 string const token = lex.getString();
1170
1171                 if (token.empty())
1172                         continue;
1173
1174                 if (token == "\\end_inset")
1175                         break;
1176
1177                 if (token == "\\end_body")
1178                         continue;
1179
1180                 if (token == "\\begin_body")
1181                         continue;
1182
1183                 if (token == "\\end_document")
1184                         return false;
1185
1186                 if (token == "\\begin_layout") {
1187                         lex.pushToken(token);
1188
1189                         Paragraph par;
1190                         par.params().depth(depth);
1191                         par.setFont(0, Font(inherit_font, buf.params().language));
1192                         par.setInsetOwner(insetPtr);
1193                         pars_.push_back(par);
1194
1195                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1196                         // not BufferParams
1197                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
1198
1199                 } else if (token == "\\begin_deeper") {
1200                         ++depth;
1201                 } else if (token == "\\end_deeper") {
1202                         if (!depth)
1203                                 lex.printError("\\end_deeper: " "depth is already null");
1204                         else
1205                                 --depth;
1206                 } else {
1207                         LYXERR0("Handling unknown body token: `" << token << '\'');
1208                 }
1209         }
1210         return true;
1211 }
1212
1213 // Returns the current font and depth as a message.
1214 docstring Text::currentState(Cursor & cur)
1215 {
1216         BOOST_ASSERT(this == cur.text());
1217         Buffer & buf = cur.buffer();
1218         Paragraph const & par = cur.paragraph();
1219         odocstringstream os;
1220
1221         if (buf.params().trackChanges)
1222                 os << _("[Change Tracking] ");
1223
1224         Change change = par.lookupChange(cur.pos());
1225
1226         if (change.type != Change::UNCHANGED) {
1227                 Author const & a = buf.params().authors().get(change.author);
1228                 os << _("Change: ") << a.name();
1229                 if (!a.email().empty())
1230                         os << " (" << a.email() << ")";
1231                 // FIXME ctime is english, we should translate that
1232                 os << _(" at ") << ctime(&change.changetime);
1233                 os << " : ";
1234         }
1235
1236         // I think we should only show changes from the default
1237         // font. (Asger)
1238         // No, from the document font (MV)
1239         Font font = cur.real_current_font;
1240         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1241
1242         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1243
1244         // The paragraph depth
1245         int depth = cur.paragraph().getDepth();
1246         if (depth > 0)
1247                 os << bformat(_(", Depth: %1$d"), depth);
1248
1249         // The paragraph spacing, but only if different from
1250         // buffer spacing.
1251         Spacing const & spacing = par.params().spacing();
1252         if (!spacing.isDefault()) {
1253                 os << _(", Spacing: ");
1254                 switch (spacing.getSpace()) {
1255                 case Spacing::Single:
1256                         os << _("Single");
1257                         break;
1258                 case Spacing::Onehalf:
1259                         os << _("OneHalf");
1260                         break;
1261                 case Spacing::Double:
1262                         os << _("Double");
1263                         break;
1264                 case Spacing::Other:
1265                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1266                         break;
1267                 case Spacing::Default:
1268                         // should never happen, do nothing
1269                         break;
1270                 }
1271         }
1272
1273 #ifdef DEVEL_VERSION
1274         os << _(", Inset: ") << &cur.inset();
1275         os << _(", Paragraph: ") << cur.pit();
1276         os << _(", Id: ") << par.id();
1277         os << _(", Position: ") << cur.pos();
1278         // FIXME: Why is the check for par.size() needed?
1279         // We are called with cur.pos() == par.size() quite often.
1280         if (!par.empty() && cur.pos() < par.size()) {
1281                 // Force output of code point, not character
1282                 size_t const c = par.getChar(cur.pos());
1283                 os << _(", Char: 0x") << hex << c;
1284         }
1285         os << _(", Boundary: ") << cur.boundary();
1286 //      Row & row = cur.textRow();
1287 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1288 #endif
1289         return os.str();
1290 }
1291
1292
1293 docstring Text::getPossibleLabel(Cursor & cur) const
1294 {
1295         pit_type pit = cur.pit();
1296
1297         LayoutPtr layout = pars_[pit].layout();
1298
1299         docstring text;
1300         docstring par_text = pars_[pit].asString(cur.buffer(), false);
1301         string piece;
1302         // the return string of math matrices might contain linebreaks
1303         par_text = subst(par_text, '\n', '-');
1304         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1305                 if (par_text.empty())
1306                         break;
1307                 docstring head;
1308                 par_text = split(par_text, head, ' ');
1309                 // Is it legal to use spaces in labels ?
1310                 if (i > 0)
1311                         text += '-';
1312                 text += head;
1313         }
1314
1315         // No need for a prefix if the user said so.
1316         if (lyxrc.label_init_length <= 0)
1317                 return text;
1318
1319         // Will contain the label type.
1320         docstring name;
1321
1322         // For section, subsection, etc...
1323         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1324                 LayoutPtr const & layout2 = pars_[pit - 1].layout();
1325                 if (layout2->latextype != LATEX_PARAGRAPH) {
1326                         --pit;
1327                         layout = layout2;
1328                 }
1329         }
1330         if (layout->latextype != LATEX_PARAGRAPH)
1331                 name = from_ascii(layout->latexname());
1332
1333         // for captions, we just take the caption type
1334         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
1335         if (caption_inset)
1336                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1337
1338         // If none of the above worked, we'll see if we're inside various
1339         // types of insets and take our abbreviation from them.
1340         if (name.empty()) {
1341                 InsetCode const codes[] = {
1342                         FLOAT_CODE,
1343                         WRAP_CODE,
1344                         FOOT_CODE
1345                 };
1346                 for (unsigned int i = 0; i < (sizeof codes / sizeof codes[0]); ++i) {
1347                         Inset * float_inset = cur.innerInsetOfType(codes[i]);
1348                         if (float_inset) {
1349                                 name = float_inset->name();
1350                                 break;
1351                         }
1352                 }
1353         }
1354
1355         // Create a correct prefix for prettyref
1356         if (name == "theorem")
1357                 name = from_ascii("thm");
1358         else if (name == "Foot")
1359                 name = from_ascii("fn");
1360         else if (name == "listing")
1361                 name = from_ascii("lst");
1362
1363         if (!name.empty())
1364                 text = name.substr(0, 3) + ':' + text;
1365
1366         return text;
1367 }
1368
1369
1370 void Text::charsTranspose(Cursor & cur)
1371 {
1372         BOOST_ASSERT(this == cur.text());
1373
1374         pos_type pos = cur.pos();
1375
1376         // If cursor is at beginning or end of paragraph, do nothing.
1377         if (pos == cur.lastpos() || pos == 0)
1378                 return;
1379
1380         Paragraph & par = cur.paragraph();
1381
1382         // Get the positions of the characters to be transposed.
1383         pos_type pos1 = pos - 1;
1384         pos_type pos2 = pos;
1385
1386         // In change tracking mode, ignore deleted characters.
1387         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1388                 ++pos2;
1389         if (pos2 == cur.lastpos())
1390                 return;
1391
1392         while (pos1 >= 0 && par.isDeleted(pos1))
1393                 --pos1;
1394         if (pos1 < 0)
1395                 return;
1396
1397         // Don't do anything if one of the "characters" is not regular text.
1398         if (par.isInset(pos1) || par.isInset(pos2))
1399                 return;
1400
1401         // Store the characters to be transposed (including font information).
1402         char_type char1 = par.getChar(pos1);
1403         Font const font1 =
1404                 par.getFontSettings(cur.buffer().params(), pos1);
1405
1406         char_type char2 = par.getChar(pos2);
1407         Font const font2 =
1408                 par.getFontSettings(cur.buffer().params(), pos2);
1409
1410         // And finally, we are ready to perform the transposition.
1411         // Track the changes if Change Tracking is enabled.
1412         bool const trackChanges = cur.buffer().params().trackChanges;
1413
1414         cur.recordUndo();
1415
1416         par.eraseChar(pos2, trackChanges);
1417         par.eraseChar(pos1, trackChanges);
1418         par.insertChar(pos1, char2, font2, trackChanges);
1419         par.insertChar(pos2, char1, font1, trackChanges);
1420
1421         cur.checkBufferStructure();
1422
1423         // After the transposition, move cursor to after the transposition.
1424         setCursor(cur, cur.pit(), pos2);
1425         cur.forwardPos();
1426 }
1427
1428
1429 DocIterator Text::macrocontextPosition() const
1430 {
1431         return macrocontext_position_;
1432 }
1433
1434
1435 void Text::setMacrocontextPosition(DocIterator const & pos)
1436 {
1437         macrocontext_position_ = pos;
1438 }
1439
1440
1441 } // namespace lyx