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 "Cursor.h"
  29 #include "ParIterator.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 "Color.h"
  41 #include "Length.h"
  42 #include "Lexer.h"
  43 #include "LyXRC.h"
  44 #include "Paragraph.h"
  45 #include "paragraph_funcs.h"
  46 #include "ParagraphParameters.h"
  47 #include "Undo.h"
  48 #include "VSpace.h"
  49 #include "WordLangTuple.h"
  50
  51 #include "frontends/FontMetrics.h"
  52 #include "frontends/Painter.h"
  53
  54 #include "insets/InsetText.h"
  55 #include "insets/InsetBibitem.h"
  56 #include "insets/InsetCaption.h"
  57 #include "insets/InsetHFill.h"
  58 #include "insets/InsetLine.h"
  59 #include "insets/InsetNewline.h"
  60 #include "insets/InsetPagebreak.h"
  61 #include "insets/InsetOptArg.h"
  62 #include "insets/InsetSpace.h"
  63 #include "insets/InsetSpecialChar.h"
  64 #include "insets/InsetTabular.h"
  65
  66 #include "support/lstrings.h"
  67 #include "support/textutils.h"
  68 #include "support/convert.h"
  69
  70 #include <boost/current_function.hpp>
  71
  72 #include <sstream>
  73
  74 using std::auto_ptr;
  75 using std::advance;
  76 using std::distance;
  77 using std::max;
  78 using std::min;
  79 using std::endl;
  80 using std::string;
  81
  82 namespace lyx {
  83
  84 using support::bformat;
  85 using support::contains;
  86 using support::lowercase;
  87 using support::split;
  88 using support::uppercase;
  89
  90 using cap::cutSelection;
  91 using cap::pasteParagraphList;
  92
  93 using frontend::FontMetrics;
  94
  95 namespace {
  96
  97 void readParToken(Buffer const & buf, Paragraph & par, Lexer & lex,
  98         string const & token, Font & font, Change & change, ErrorList & errorList)
  99 {
 100         BufferParams const & bp = buf.params();
 101
 102         if (token[0] != '\\') {
 103 #if 0
 104                 string::const_iterator cit = token.begin();
 105                 for (; cit != token.end(); ++cit)
 106                         par.insertChar(par.size(), (*cit), font, change);
 107 #else
 108                 docstring dstr = lex.getDocString();
 109                 docstring::const_iterator cit = dstr.begin();
 110                 docstring::const_iterator cend = dstr.end();
 111                 for (; cit != cend; ++cit)
 112                         par.insertChar(par.size(), *cit, font, change);
 113 #endif
 114         } else if (token == "\\begin_layout") {
 115                 lex.eatLine();
 116                 docstring layoutname = lex.getDocString();
 117
 118                 font = Font(Font::ALL_INHERIT, bp.language);
 119                 change = Change(Change::UNCHANGED);
 120
 121                 TextClass const & tclass = bp.getTextClass();
 122
 123                 if (layoutname.empty()) {
 124                         layoutname = tclass.defaultLayoutName();
 125                 }
 126
 127                 bool hasLayout = tclass.hasLayout(layoutname);
 128
 129                 if (!hasLayout) {
 130                         errorList.push_back(ErrorItem(_("Unknown layout"),
 131                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 132                         layoutname, from_utf8(tclass.name())), par.id(), 0, par.size()));
 133                         layoutname = tclass.defaultLayoutName();
 134                 }
 135
 136                 par.layout(bp.getTextClass()[layoutname]);
 137
 138                 // Test whether the layout is obsolete.
 139                 LayoutPtr const & layout = par.layout();
 140                 if (!layout->obsoleted_by().empty())
 141                         par.layout(bp.getTextClass()[layout->obsoleted_by()]);
 142
 143                 par.params().read(lex);
 144
 145         } else if (token == "\\end_layout") {
 146                 lyxerr << BOOST_CURRENT_FUNCTION
 147                        << ": Solitary \\end_layout in line "
 148                        << lex.getLineNo() << "\n"
 149                        << "Missing \\begin_layout?.\n";
 150         } else if (token == "\\end_inset") {
 151                 lyxerr << BOOST_CURRENT_FUNCTION
 152                        << ": Solitary \\end_inset in line "
 153                        << lex.getLineNo() << "\n"
 154                        << "Missing \\begin_inset?.\n";
 155         } else if (token == "\\begin_inset") {
 156                 Inset * inset = readInset(lex, buf);
 157                 if (inset)
 158                         par.insertInset(par.size(), inset, font, change);
 159                 else {
 160                         lex.eatLine();
 161                         docstring line = lex.getDocString();
 162                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 163                                             par.id(), 0, par.size()));
 164                 }
 165         } else if (token == "\\family") {
 166                 lex.next();
 167                 font.setLyXFamily(lex.getString());
 168         } else if (token == "\\series") {
 169                 lex.next();
 170                 font.setLyXSeries(lex.getString());
 171         } else if (token == "\\shape") {
 172                 lex.next();
 173                 font.setLyXShape(lex.getString());
 174         } else if (token == "\\size") {
 175                 lex.next();
 176                 font.setLyXSize(lex.getString());
 177         } else if (token == "\\lang") {
 178                 lex.next();
 179                 string const tok = lex.getString();
 180                 Language const * lang = languages.getLanguage(tok);
 181                 if (lang) {
 182                         font.setLanguage(lang);
 183                 } else {
 184                         font.setLanguage(bp.language);
 185                         lex.printError("Unknown language `$$Token'");
 186                 }
 187         } else if (token == "\\numeric") {
 188                 lex.next();
 189                 font.setNumber(font.setLyXMisc(lex.getString()));
 190         } else if (token == "\\emph") {
 191                 lex.next();
 192                 font.setEmph(font.setLyXMisc(lex.getString()));
 193         } else if (token == "\\bar") {
 194                 lex.next();
 195                 string const tok = lex.getString();
 196
 197                 if (tok == "under")
 198                         font.setUnderbar(Font::ON);
 199                 else if (tok == "no")
 200                         font.setUnderbar(Font::OFF);
 201                 else if (tok == "default")
 202                         font.setUnderbar(Font::INHERIT);
 203                 else
 204                         lex.printError("Unknown bar font flag "
 205                                        "`$$Token'");
 206         } else if (token == "\\noun") {
 207                 lex.next();
 208                 font.setNoun(font.setLyXMisc(lex.getString()));
 209         } else if (token == "\\color") {
 210                 lex.next();
 211                 font.setLyXColor(lex.getString());
 212         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 213
 214                 // Insets don't make sense in a free-spacing context! ---Kayvan
 215                 if (par.isFreeSpacing()) {
 216                         if (token == "\\InsetSpace")
 217                                 par.insertChar(par.size(), ' ', font, change);
 218                         else if (lex.isOK()) {
 219                                 lex.next();
 220                                 string const next_token = lex.getString();
 221                                 if (next_token == "\\-")
 222                                         par.insertChar(par.size(), '-', font, change);
 223                                 else {
 224                                         lex.printError("Token `$$Token' "
 225                                                        "is in free space "
 226                                                        "paragraph layout!");
 227                                 }
 228                         }
 229                 } else {
 230                         auto_ptr<Inset> inset;
 231                         if (token == "\\SpecialChar" )
 232                                 inset.reset(new InsetSpecialChar);
 233                         else
 234                                 inset.reset(new InsetSpace);
 235                         inset->read(buf, lex);
 236                         par.insertInset(par.size(), inset.release(),
 237                                         font, change);
 238                 }
 239         } else if (token == "\\backslash") {
 240                 par.insertChar(par.size(), '\\', font, change);
 241         } else if (token == "\\newline") {
 242                 auto_ptr<Inset> inset(new InsetNewline);
 243                 inset->read(buf, lex);
 244                 par.insertInset(par.size(), inset.release(), font, change);
 245         } else if (token == "\\LyXTable") {
 246                 auto_ptr<Inset> inset(new InsetTabular(buf));
 247                 inset->read(buf, lex);
 248                 par.insertInset(par.size(), inset.release(), font, change);
 249         } else if (token == "\\hfill") {
 250                 par.insertInset(par.size(), new InsetHFill, font, change);
 251         } else if (token == "\\lyxline") {
 252                 par.insertInset(par.size(), new InsetLine, font, change);
 253         } else if (token == "\\newpage") {
 254                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 255         } else if (token == "\\clearpage") {
 256                 par.insertInset(par.size(), new InsetClearPage, font, change);
 257         } else if (token == "\\cleardoublepage") {
 258                 par.insertInset(par.size(), new InsetClearDoublePage, font, change);
 259         } else if (token == "\\change_unchanged") {
 260                 change = Change(Change::UNCHANGED);
 261         } else if (token == "\\change_inserted") {
 262                 lex.eatLine();
 263                 std::istringstream is(lex.getString());
 264                 unsigned int aid;
 265                 time_type ct;
 266                 is >> aid >> ct;
 267                 if (aid >= bp.author_map.size()) {
 268                         errorList.push_back(ErrorItem(_("Change tracking error"),
 269                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 270                                             par.id(), 0, par.size()));
 271                         change = Change(Change::UNCHANGED);
 272                 } else
 273                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 274         } else if (token == "\\change_deleted") {
 275                 lex.eatLine();
 276                 std::istringstream is(lex.getString());
 277                 unsigned int aid;
 278                 time_type ct;
 279                 is >> aid >> ct;
 280                 if (aid >= bp.author_map.size()) {
 281                         errorList.push_back(ErrorItem(_("Change tracking error"),
 282                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 283                                             par.id(), 0, par.size()));
 284                         change = Change(Change::UNCHANGED);
 285                 } else
 286                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 287         } else {
 288                 lex.eatLine();
 289                 errorList.push_back(ErrorItem(_("Unknown token"),
 290                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 291                         lex.getDocString()),
 292                         par.id(), 0, par.size()));
 293         }
 294 }
 295
 296
 297 void readParagraph(Buffer const & buf, Paragraph & par, Lexer & lex,
 298         ErrorList & errorList)
 299 {
 300         lex.nextToken();
 301         string token = lex.getString();
 302         Font font;
 303         Change change(Change::UNCHANGED);
 304
 305         while (lex.isOK()) {
 306                 readParToken(buf, par, lex, token, font, change, errorList);
 307
 308                 lex.nextToken();
 309                 token = lex.getString();
 310
 311                 if (token.empty())
 312                         continue;
 313
 314                 if (token == "\\end_layout") {
 315                         //Ok, paragraph finished
 316                         break;
 317                 }
 318
 319                 LYXERR(Debug::PARSER) << "Handling paragraph token: `"
 320                                       << token << '\'' << endl;
 321                 if (token == "\\begin_layout" || token == "\\end_document"
 322                     || token == "\\end_inset" || token == "\\begin_deeper"
 323                     || token == "\\end_deeper") {
 324                         lex.pushToken(token);
 325                         lyxerr << "Paragraph ended in line "
 326                                << lex.getLineNo() << "\n"
 327                                << "Missing \\end_layout.\n";
 328                         break;
 329                 }
 330         }
 331         // Final change goes to paragraph break:
 332         par.setChange(par.size(), change);
 333
 334         // Initialize begin_of_body_ on load; redoParagraph maintains
 335         par.setBeginOfBody();
 336 }
 337
 338
 339 } // namespace anon
 340
 341
 342 bool Text::empty() const
 343 {
 344         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 345                 // FIXME: Should we consider the labeled type as empty too?
 346                 && pars_[0].layout()->labeltype == LABEL_NO_LABEL);
 347 }
 348
 349
 350 double Text::spacing(Buffer const & buffer,
 351                 Paragraph const & par) const
 352 {
 353         if (par.params().spacing().isDefault())
 354                 return buffer.params().spacing().getValue();
 355         return par.params().spacing().getValue();
 356 }
 357
 358
 359 void Text::breakParagraph(Cursor & cur, bool keep_layout)
 360 {
 361         BOOST_ASSERT(this == cur.text());
 362
 363         Paragraph & cpar = cur.paragraph();
 364         pit_type cpit = cur.pit();
 365
 366         TextClass const & tclass = cur.buffer().params().getTextClass();
 367         LayoutPtr const & layout = cpar.layout();
 368
 369         // this is only allowed, if the current paragraph is not empty
 370         // or caption and if it has not the keepempty flag active
 371         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 372             layout->labeltype != LABEL_SENSITIVE)
 373                 return;
 374
 375         // a layout change may affect also the following paragraph
 376         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 377
 378         // Always break behind a space
 379         // It is better to erase the space (Dekel)
 380         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 381                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
 382
 383         // What should the layout for the new paragraph be?
 384         int preserve_layout = 0;
 385         if (keep_layout)
 386                 preserve_layout = 2;
 387         else
 388                 preserve_layout = layout->isEnvironment();
 389
 390         // We need to remember this before we break the paragraph, because
 391         // that invalidates the layout variable
 392         bool sensitive = layout->labeltype == LABEL_SENSITIVE;
 393
 394         // we need to set this before we insert the paragraph.
 395         bool const isempty = cpar.allowEmpty() && cpar.empty();
 396
 397         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
 398                          cur.pos(), preserve_layout);
 399
 400         // After this, neither paragraph contains any rows!
 401
 402         cpit = cur.pit();
 403         pit_type next_par = cpit + 1;
 404
 405         // well this is the caption hack since one caption is really enough
 406         if (sensitive) {
 407                 if (cur.pos() == 0)
 408                         // set to standard-layout
 409                         pars_[cpit].applyLayout(tclass.defaultLayout());
 410                 else
 411                         // set to standard-layout
 412                         pars_[next_par].applyLayout(tclass.defaultLayout());
 413         }
 414
 415         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 416                 if (!pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges))
 417                         break; // the character couldn't be deleted physically due to change tracking
 418         }
 419
 420         updateLabels(cur.buffer());
 421
 422         // A singlePar update is not enough in this case.
 423         cur.updateFlags(Update::Force);
 424
 425         // This check is necessary. Otherwise the new empty paragraph will
 426         // be deleted automatically. And it is more friendly for the user!
 427         if (cur.pos() != 0 || isempty)
 428                 setCursor(cur, cur.pit() + 1, 0);
 429         else
 430                 setCursor(cur, cur.pit(), 0);
 431 }
 432
 433
 434 // insert a character, moves all the following breaks in the
 435 // same Paragraph one to the right and make a rebreak
 436 void Text::insertChar(Cursor & cur, char_type c)
 437 {
 438         BOOST_ASSERT(this == cur.text());
 439         BOOST_ASSERT(c != Paragraph::META_INSET);
 440
 441         recordUndo(cur, Undo::INSERT);
 442
 443         Buffer const & buffer = cur.buffer();
 444         Paragraph & par = cur.paragraph();
 445         // try to remove this
 446         pit_type const pit = cur.pit();
 447
 448         bool const freeSpacing = par.layout()->free_spacing ||
 449                 par.isFreeSpacing();
 450
 451         if (lyxrc.auto_number) {
 452                 static docstring const number_operators = from_ascii("+-/*");
 453                 static docstring const number_unary_operators = from_ascii("+-");
 454                 static docstring const number_seperators = from_ascii(".,:");
 455
 456                 if (cur.current_font.number() == Font::ON) {
 457                         if (!isDigit(c) && !contains(number_operators, c) &&
 458                             !(contains(number_seperators, c) &&
 459                               cur.pos() != 0 &&
 460                               cur.pos() != cur.lastpos() &&
 461                               getFont(buffer, par, cur.pos()).number() == Font::ON &&
 462                               getFont(buffer, par, cur.pos() - 1).number() == Font::ON)
 463                            )
 464                                 number(cur); // Set current_font.number to OFF
 465                 } else if (isDigit(c) &&
 466                            cur.real_current_font.isVisibleRightToLeft()) {
 467                         number(cur); // Set current_font.number to ON
 468
 469                         if (cur.pos() != 0) {
 470                                 char_type const c = par.getChar(cur.pos() - 1);
 471                                 if (contains(number_unary_operators, c) &&
 472                                     (cur.pos() == 1
 473                                      || par.isSeparator(cur.pos() - 2)
 474                                      || par.isNewline(cur.pos() - 2))
 475                                   ) {
 476                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font);
 477                                 } else if (contains(number_seperators, c)
 478                                      && cur.pos() >= 2
 479                                      && getFont(buffer, par, cur.pos() - 2).number() == Font::ON) {
 480                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font);
 481                                 }
 482                         }
 483                 }
 484         }
 485
 486         // In Bidi text, we want spaces to be treated in a special way: spaces
 487         // which are between words in different languages should get the
 488         // paragraph's language; otherwise, spaces should keep the language
 489         // they were originally typed in. This is only in effect while typing;
 490         // after the text is already typed in, the user can always go back and
 491         // explicitly set the language of a space as desired. But 99.9% of the
 492         // time, what we're doing here is what the user actually meant.
 493         //
 494         // The following cases are the ones in which the language of the space
 495         // should be changed to match that of the containing paragraph. In the
 496         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 497         // represents a space, pipe (|) represents the cursor position (so the
 498         // character before it is the one just typed in). The different cases
 499         // are depicted logically (not visually), from left to right:
 500         //
 501         // 1. A_a|
 502         // 2. a_A|
 503         //
 504         // Theoretically, there are other situations that we should, perhaps, deal
 505         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 506         // point (to understand why, just try to create this situation...).
 507
 508         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 509                 // get font in front and behind the space in question. But do NOT
 510                 // use getFont(cur.pos()) because the character c is not inserted yet
 511                 Font const & pre_space_font  = getFont(buffer, par, cur.pos() - 2);
 512                 Font const & post_space_font = cur.real_current_font;
 513                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 514                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 515
 516                 if (pre_space_rtl != post_space_rtl) {
 517                         // Set the space's language to match the language of the
 518                         // adjacent character whose direction is the paragraph's
 519                         // direction; don't touch other properties of the font
 520                         Language const * lang =
 521                                 (pre_space_rtl == par.isRightToLeftPar(buffer.params())) ?
 522                                 pre_space_font.language() : post_space_font.language();
 523
 524                         Font space_font = getFont(buffer, par, cur.pos() - 1);
 525                         space_font.setLanguage(lang);
 526                         par.setFont(cur.pos() - 1, space_font);
 527                 }
 528         }
 529
 530         // Next check, if there will be two blanks together or a blank at
 531         // the beginning of a paragraph.
 532         // I decided to handle blanks like normal characters, the main
 533         // difference are the special checks when calculating the row.fill
 534         // (blank does not count at the end of a row) and the check here
 535
 536         // When the free-spacing option is set for the current layout,
 537         // disable the double-space checking
 538         if (!freeSpacing && isLineSeparatorChar(c)) {
 539                 if (cur.pos() == 0) {
 540                         static bool sent_space_message = false;
 541                         if (!sent_space_message) {
 542                                 cur.message(_("You cannot insert a space at the "
 543                                                            "beginning of a paragraph. Please read the Tutorial."));
 544                                 sent_space_message = true;
 545                         }
 546                         return;
 547                 }
 548                 BOOST_ASSERT(cur.pos() > 0);
 549                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 550                     && !par.isDeleted(cur.pos() - 1)) {
 551                         static bool sent_space_message = false;
 552                         if (!sent_space_message) {
 553                                 cur.message(_("You cannot type two spaces this way. "
 554                                                            "Please read the Tutorial."));
 555                                 sent_space_message = true;
 556                         }
 557                         return;
 558                 }
 559         }
 560
 561         par.insertChar(cur.pos(), c, cur.current_font, cur.buffer().params().trackChanges);
 562         checkBufferStructure(cur.buffer(), cur);
 563
 564 //              cur.updateFlags(Update::Force);
 565         setCursor(cur.top(), cur.pit(), cur.pos() + 1);
 566         charInserted();
 567 }
 568
 569
 570 void Text::charInserted()
 571 {
 572         // Here we call finishUndo for every 20 characters inserted.
 573         // This is from my experience how emacs does it. (Lgb)
 574         static unsigned int counter;
 575         if (counter < 20) {
 576                 ++counter;
 577         } else {
 578                 finishUndo();
 579                 counter = 0;
 580         }
 581 }
 582
 583
 584 // the cursor set functions have a special mechanism. When they
 585 // realize, that you left an empty paragraph, they will delete it.
 586
 587 bool Text::cursorRightOneWord(Cursor & cur)
 588 {
 589         BOOST_ASSERT(this == cur.text());
 590
 591         Cursor old = cur;
 592
 593         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
 594                 ++old.pit();
 595                 old.pos() = 0;
 596         } else {
 597                 // Advance through word.
 598                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
 599                         ++old.pos();
 600                 // Skip through trailing nonword stuff.
 601                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
 602                         ++old.pos();
 603         }
 604         return setCursor(cur, old.pit(), old.pos());
 605 }
 606
 607
 608 bool Text::cursorLeftOneWord(Cursor & cur)
 609 {
 610         BOOST_ASSERT(this == cur.text());
 611
 612         Cursor old = cur;
 613
 614         if (old.pos() == 0 && old.pit() != 0) {
 615                 --old.pit();
 616                 old.pos() = old.lastpos();
 617         } else {
 618                 // Skip through initial nonword stuff.
 619                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
 620                         --old.pos();
 621                 // Advance through word.
 622                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
 623                         --old.pos();
 624         }
 625         return setCursor(cur, old.pit(), old.pos());
 626 }
 627
 628
 629 void Text::selectWord(Cursor & cur, word_location loc)
 630 {
 631         BOOST_ASSERT(this == cur.text());
 632         CursorSlice from = cur.top();
 633         CursorSlice to = cur.top();
 634         getWord(from, to, loc);
 635         if (cur.top() != from)
 636                 setCursor(cur, from.pit(), from.pos());
 637         if (to == from)
 638                 return;
 639         cur.resetAnchor();
 640         setCursor(cur, to.pit(), to.pos());
 641         cur.setSelection();
 642 }
 643
 644
 645 // Select the word currently under the cursor when no
 646 // selection is currently set
 647 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
 648 {
 649         BOOST_ASSERT(this == cur.text());
 650         if (cur.selection())
 651                 return false;
 652         selectWord(cur, loc);
 653         return cur.selection();
 654 }
 655
 656
 657 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
 658 {
 659         BOOST_ASSERT(this == cur.text());
 660
 661         if (!cur.selection())
 662                 return;
 663
 664         recordUndoSelection(cur, Undo::ATOMIC);
 665
 666         pit_type begPit = cur.selectionBegin().pit();
 667         pit_type endPit = cur.selectionEnd().pit();
 668
 669         pos_type begPos = cur.selectionBegin().pos();
 670         pos_type endPos = cur.selectionEnd().pos();
 671
 672         // keep selection info, because endPos becomes invalid after the first loop
 673         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
 674
 675         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
 676
 677         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 678                 pos_type parSize = pars_[pit].size();
 679
 680                 // ignore empty paragraphs; otherwise, an assertion will fail for
 681                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
 682                 if (parSize == 0)
 683                         continue;
 684
 685                 // do not consider first paragraph if the cursor starts at pos size()
 686                 if (pit == begPit && begPos == parSize)
 687                         continue;
 688
 689                 // do not consider last paragraph if the cursor ends at pos 0
 690                 if (pit == endPit && endPos == 0)
 691                         break; // last iteration anyway
 692
 693                 pos_type left  = (pit == begPit ? begPos : 0);
 694                 pos_type right = (pit == endPit ? endPos : parSize);
 695
 696                 if (op == ACCEPT) {
 697                         pars_[pit].acceptChanges(cur.buffer().params(), left, right);
 698                 } else {
 699                         pars_[pit].rejectChanges(cur.buffer().params(), left, right);
 700                 }
 701         }
 702
 703         // next, accept/reject imaginary end-of-par characters
 704
 705         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 706                 pos_type pos = pars_[pit].size();
 707
 708                 // skip if the selection ends before the end-of-par
 709                 if (pit == endPit && endsBeforeEndOfPar)
 710                         break; // last iteration anyway
 711
 712                 // skip if this is not the last paragraph of the document
 713                 // note: the user should be able to accept/reject the par break of the last par!
 714                 if (pit == endPit && pit + 1 != int(pars_.size()))
 715                         break; // last iteration anway
 716
 717                 if (op == ACCEPT) {
 718                         if (pars_[pit].isInserted(pos)) {
 719                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 720                         } else if (pars_[pit].isDeleted(pos)) {
 721                                 if (pit + 1 == int(pars_.size())) {
 722                                         // we cannot remove a par break at the end of the last paragraph;
 723                                         // instead, we mark it unchanged
 724                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 725                                 } else {
 726                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 727                                         --endPit;
 728                                         --pit;
 729                                 }
 730                         }
 731                 } else {
 732                         if (pars_[pit].isDeleted(pos)) {
 733                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 734                         } else if (pars_[pit].isInserted(pos)) {
 735                                 if (pit + 1 == int(pars_.size())) {
 736                                         // we mark the par break at the end of the last paragraph unchanged
 737                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 738                                 } else {
 739                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 740                                         --endPit;
 741                                         --pit;
 742                                 }
 743                         }
 744                 }
 745         }
 746
 747         // finally, invoke the DEPM
 748
 749         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer().params().trackChanges);
 750
 751         //
 752
 753         finishUndo();
 754         cur.clearSelection();
 755         setCursorIntern(cur, begPit, begPos);
 756         cur.updateFlags(Update::Force);
 757         updateLabels(cur.buffer());
 758 }
 759
 760
 761 void Text::acceptChanges(BufferParams const & bparams)
 762 {
 763         lyx::acceptChanges(pars_, bparams);
 764         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
 765 }
 766
 767
 768 void Text::rejectChanges(BufferParams const & bparams)
 769 {
 770         pit_type pars_size = static_cast<pit_type>(pars_.size());
 771
 772         // first, reject changes within each individual paragraph
 773         // (do not consider end-of-par)
 774         for (pit_type pit = 0; pit < pars_size; ++pit) {
 775                 if (!pars_[pit].empty())   // prevent assertion failure
 776                         pars_[pit].rejectChanges(bparams, 0, pars_[pit].size());
 777         }
 778
 779         // next, reject imaginary end-of-par characters
 780         for (pit_type pit = 0; pit < pars_size; ++pit) {
 781                 pos_type pos = pars_[pit].size();
 782
 783                 if (pars_[pit].isDeleted(pos)) {
 784                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 785                 } else if (pars_[pit].isInserted(pos)) {
 786                         if (pit == pars_size - 1) {
 787                                 // we mark the par break at the end of the last
 788                                 // paragraph unchanged
 789                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 790                         } else {
 791                                 mergeParagraph(bparams, pars_, pit);
 792                                 --pit;
 793                                 --pars_size;
 794                         }
 795                 }
 796         }
 797
 798         // finally, invoke the DEPM
 799         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
 800 }
 801
 802
 803 void Text::deleteWordForward(Cursor & cur)
 804 {
 805         BOOST_ASSERT(this == cur.text());
 806         if (cur.lastpos() == 0)
 807                 cursorRight(cur);
 808         else {
 809                 cur.resetAnchor();
 810                 cur.selection() = true;
 811                 cursorRightOneWord(cur);
 812                 cur.setSelection();
 813                 cutSelection(cur, true, false);
 814                 checkBufferStructure(cur.buffer(), cur);
 815         }
 816 }
 817
 818
 819 void Text::deleteWordBackward(Cursor & cur)
 820 {
 821         BOOST_ASSERT(this == cur.text());
 822         if (cur.lastpos() == 0)
 823                 cursorLeft(cur);
 824         else {
 825                 cur.resetAnchor();
 826                 cur.selection() = true;
 827                 cursorLeftOneWord(cur);
 828                 cur.setSelection();
 829                 cutSelection(cur, true, false);
 830                 checkBufferStructure(cur.buffer(), cur);
 831         }
 832 }
 833
 834
 835 // Kill to end of line.
 836 void Text::changeCase(Cursor & cur, Text::TextCase action)
 837 {
 838         BOOST_ASSERT(this == cur.text());
 839         CursorSlice from;
 840         CursorSlice to;
 841
 842         if (cur.selection()) {
 843                 from = cur.selBegin();
 844                 to = cur.selEnd();
 845         } else {
 846                 from = cur.top();
 847                 getWord(from, to, PARTIAL_WORD);
 848                 cursorRightOneWord(cur);
 849         }
 850
 851         recordUndoSelection(cur, Undo::ATOMIC);
 852
 853         pit_type begPit = from.pit();
 854         pit_type endPit = to.pit();
 855
 856         pos_type begPos = from.pos();
 857         pos_type endPos = to.pos();
 858
 859         bool const trackChanges = cur.buffer().params().trackChanges;
 860
 861         pos_type right = 0; // needed after the for loop
 862
 863         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 864                 pos_type parSize = pars_[pit].size();
 865
 866                 pos_type pos = (pit == begPit ? begPos : 0);
 867                 right = (pit == endPit ? endPos : parSize);
 868
 869                 // process sequences of modified characters; in change
 870                 // tracking mode, this approach results in much better
 871                 // usability than changing case on a char-by-char basis
 872                 docstring changes;
 873
 874                 bool capitalize = true;
 875
 876                 for (; pos < right; ++pos) {
 877                         char_type oldChar = pars_[pit].getChar(pos);
 878                         char_type newChar = oldChar;
 879
 880                         // ignore insets and don't play with deleted text!
 881                         if (oldChar != Paragraph::META_INSET && !pars_[pit].isDeleted(pos)) {
 882                                 switch (action) {
 883                                 case text_lowercase:
 884                                         newChar = lowercase(oldChar);
 885                                         break;
 886                                 case text_capitalization:
 887                                         if (capitalize) {
 888                                                 newChar = uppercase(oldChar);
 889                                                 capitalize = false;
 890                                         }
 891                                         break;
 892                                 case text_uppercase:
 893                                         newChar = uppercase(oldChar);
 894                                         break;
 895                                 }
 896                         }
 897
 898                         if (!pars_[pit].isLetter(pos) || pars_[pit].isDeleted(pos)) {
 899                                 capitalize = true; // permit capitalization again
 900                         }
 901
 902                         if (oldChar != newChar) {
 903                                 changes += newChar;
 904                         }
 905
 906                         if (oldChar == newChar || pos == right - 1) {
 907                                 if (oldChar != newChar) {
 908                                         pos++; // step behind the changing area
 909                                 }
 910                                 int erasePos = pos - changes.size();
 911                                 for (size_t i = 0; i < changes.size(); i++) {
 912                                         pars_[pit].insertChar(pos, changes[i],
 913                                                 pars_[pit].getFontSettings(cur.buffer().params(),
 914                                                                 erasePos),
 915                                                 trackChanges);
 916                                         if (!pars_[pit].eraseChar(erasePos, trackChanges)) {
 917                                                 ++erasePos;
 918                                                 ++pos; // advance
 919                                                 ++right; // expand selection
 920                                         }
 921                                 }
 922                                 changes.clear();
 923                         }
 924                 }
 925         }
 926
 927         // the selection may have changed due to logically-only deleted chars
 928         setCursor(cur, begPit, begPos);
 929         cur.resetAnchor();
 930         setCursor(cur, endPit, right);
 931         cur.setSelection();
 932
 933         checkBufferStructure(cur.buffer(), cur);
 934 }
 935
 936
 937 bool Text::handleBibitems(Cursor & cur)
 938 {
 939         if (cur.paragraph().layout()->labeltype != LABEL_BIBLIO)
 940                 return false;
 941         // if a bibitem is deleted, merge with previous paragraph
 942         // if this is a bibliography item as well
 943         if (cur.pos() == 0) {
 944                 BufferParams const & bufparams = cur.buffer().params();
 945                 Paragraph const & par = cur.paragraph();
 946                 Cursor prevcur = cur;
 947                 if (cur.pit() > 0) {
 948                         --prevcur.pit();
 949                         prevcur.pos() = prevcur.lastpos();
 950                 }
 951                 Paragraph const & prevpar = prevcur.paragraph();
 952                 if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
 953                         recordUndo(cur, Undo::ATOMIC, prevcur.pit());
 954                         mergeParagraph(bufparams, cur.text()->paragraphs(),
 955                                        prevcur.pit());
 956                         updateLabels(cur.buffer());
 957                         setCursorIntern(cur, prevcur.pit(), prevcur.pos());
 958                         cur.updateFlags(Update::Force);
 959                 // if not, reset the paragraph to default
 960                 } else
 961                         cur.paragraph().layout(
 962                                 bufparams.getTextClass().defaultLayout());
 963                 return true;
 964         }
 965         return false;
 966 }
 967
 968
 969 bool Text::erase(Cursor & cur)
 970 {
 971         BOOST_ASSERT(this == cur.text());
 972         bool needsUpdate = false;
 973         Paragraph & par = cur.paragraph();
 974
 975         if (cur.pos() != cur.lastpos()) {
 976                 // this is the code for a normal delete, not pasting
 977                 // any paragraphs
 978                 recordUndo(cur, Undo::DELETE);
 979                 if(!par.eraseChar(cur.pos(), cur.buffer().params().trackChanges)) {
 980                         // the character has been logically deleted only => skip it
 981                         cur.top().forwardPos();
 982                 }
 983                 checkBufferStructure(cur.buffer(), cur);
 984                 needsUpdate = true;
 985         } else {
 986                 if (cur.pit() == cur.lastpit())
 987                         return dissolveInset(cur);
 988
 989                 if (!par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
 990                         par.setChange(cur.pos(), Change(Change::DELETED));
 991                         cur.forwardPos();
 992                         needsUpdate = true;
 993                 } else {
 994                         setCursorIntern(cur, cur.pit() + 1, 0);
 995                         needsUpdate = backspacePos0(cur);
 996                 }
 997         }
 998
 999         needsUpdate |= handleBibitems(cur);
1000
1001         if (needsUpdate) {
1002                 // Make sure the cursor is correct. Is this really needed?
1003                 // No, not really... at least not here!
1004                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
1005                 checkBufferStructure(cur.buffer(), cur);
1006         }
1007
1008         return needsUpdate;
1009 }
1010
1011
1012 bool Text::backspacePos0(Cursor & cur)
1013 {
1014         BOOST_ASSERT(this == cur.text());
1015         if (cur.pit() == 0)
1016                 return false;
1017
1018         bool needsUpdate = false;
1019
1020         BufferParams const & bufparams = cur.buffer().params();
1021         TextClass const & tclass = bufparams.getTextClass();
1022         ParagraphList & plist = cur.text()->paragraphs();
1023         Paragraph const & par = cur.paragraph();
1024         Cursor prevcur = cur;
1025         --prevcur.pit();
1026         prevcur.pos() = prevcur.lastpos();
1027         Paragraph const & prevpar = prevcur.paragraph();
1028
1029         // is it an empty paragraph?
1030         if (cur.lastpos() == 0
1031             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1032                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1033                 plist.erase(boost::next(plist.begin(), cur.pit()));
1034                 needsUpdate = true;
1035         }
1036         // is previous par empty?
1037         else if (prevcur.lastpos() == 0
1038                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1039                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1040                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1041                 needsUpdate = true;
1042         }
1043         // Pasting is not allowed, if the paragraphs have different
1044         // layouts. I think it is a real bug of all other
1045         // word processors to allow it. It confuses the user.
1046         // Correction: Pasting is always allowed with standard-layout
1047         else if (par.layout() == prevpar.layout()
1048                  || par.layout() == tclass.defaultLayout()) {
1049                 recordUndo(cur, Undo::ATOMIC, prevcur.pit());
1050                 mergeParagraph(bufparams, plist, prevcur.pit());
1051                 needsUpdate = true;
1052         }
1053
1054         if (needsUpdate) {
1055                 updateLabels(cur.buffer());
1056                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1057         }
1058
1059         return needsUpdate;
1060 }
1061
1062
1063 bool Text::backspace(Cursor & cur)
1064 {
1065         BOOST_ASSERT(this == cur.text());
1066         bool needsUpdate = false;
1067         if (cur.pos() == 0) {
1068                 if (cur.pit() == 0)
1069                         return dissolveInset(cur);
1070
1071                 Paragraph & prev_par = pars_[cur.pit() - 1];
1072
1073                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1074                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1075                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1076                         return true;
1077                 }
1078                 // The cursor is at the beginning of a paragraph, so
1079                 // the backspace will collapse two paragraphs into one.
1080                 needsUpdate = backspacePos0(cur);
1081
1082         } else {
1083                 // this is the code for a normal backspace, not pasting
1084                 // any paragraphs
1085                 recordUndo(cur, Undo::DELETE);
1086                 // We used to do cursorLeftIntern() here, but it is
1087                 // not a good idea since it triggers the auto-delete
1088                 // mechanism. So we do a cursorLeftIntern()-lite,
1089                 // without the dreaded mechanism. (JMarc)
1090                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1091                                 false, cur.boundary());
1092                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1093                 checkBufferStructure(cur.buffer(), cur);
1094         }
1095
1096         if (cur.pos() == cur.lastpos())
1097                 cur.setCurrentFont();
1098
1099         needsUpdate |= handleBibitems(cur);
1100
1101         // A singlePar update is not enough in this case.
1102 //              cur.updateFlags(Update::Force);
1103         setCursor(cur.top(), cur.pit(), cur.pos());
1104
1105         return needsUpdate;
1106 }
1107
1108
1109 bool Text::dissolveInset(Cursor & cur) {
1110         BOOST_ASSERT(this == cur.text());
1111
1112         if (isMainText(cur.bv().buffer()) || cur.inset().nargs() != 1)
1113                 return false;
1114
1115         recordUndoInset(cur);
1116         cur.selHandle(false);
1117         // save position
1118         pos_type spos = cur.pos();
1119         pit_type spit = cur.pit();
1120         ParagraphList plist;
1121         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1122                 plist = paragraphs();
1123         cur.popLeft();
1124         // store cursor offset
1125         if (spit == 0)
1126                 spos += cur.pos();
1127         spit += cur.pit();
1128         Buffer & b = cur.buffer();
1129         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1130         if (!plist.empty()) {
1131                 // ERT paragraphs have the Language latex_language.
1132                 // This is invalid outside of ERT, so we need to
1133                 // change it to the buffer language.
1134                 ParagraphList::iterator it = plist.begin();
1135                 ParagraphList::iterator it_end = plist.end();
1136                 for (; it != it_end; it++) {
1137                         it->changeLanguage(b.params(), latex_language,
1138                                         b.getLanguage());
1139                 }
1140
1141                 pasteParagraphList(cur, plist, b.params().getTextClass_ptr(),
1142                                    b.errorList("Paste"));
1143                 // restore position
1144                 cur.pit() = std::min(cur.lastpit(), spit);
1145                 cur.pos() = std::min(cur.lastpos(), spos);
1146         }
1147         cur.clearSelection();
1148         cur.resetAnchor();
1149         return true;
1150 }
1151
1152
1153 void Text::getWord(CursorSlice & from, CursorSlice & to,
1154         word_location const loc)
1155 {
1156         Paragraph const & from_par = pars_[from.pit()];
1157         switch (loc) {
1158         case WHOLE_WORD_STRICT:
1159                 if (from.pos() == 0 || from.pos() == from_par.size()
1160                     || !from_par.isLetter(from.pos())
1161                     || !from_par.isLetter(from.pos() - 1)) {
1162                         to = from;
1163                         return;
1164                 }
1165                 // no break here, we go to the next
1166
1167         case WHOLE_WORD:
1168                 // If we are already at the beginning of a word, do nothing
1169                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1170                         break;
1171                 // no break here, we go to the next
1172
1173         case PREVIOUS_WORD:
1174                 // always move the cursor to the beginning of previous word
1175                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1176                         --from.pos();
1177                 break;
1178         case NEXT_WORD:
1179                 lyxerr << "Text::getWord: NEXT_WORD not implemented yet"
1180                        << endl;
1181                 break;
1182         case PARTIAL_WORD:
1183                 // no need to move the 'from' cursor
1184                 break;
1185         }
1186         to = from;
1187         Paragraph & to_par = pars_[to.pit()];
1188         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1189                 ++to.pos();
1190 }
1191
1192
1193 void Text::write(Buffer const & buf, std::ostream & os) const
1194 {
1195         ParagraphList::const_iterator pit = paragraphs().begin();
1196         ParagraphList::const_iterator end = paragraphs().end();
1197         depth_type dth = 0;
1198         for (; pit != end; ++pit)
1199                 pit->write(buf, os, buf.params(), dth);
1200
1201         // Close begin_deeper
1202         for(; dth > 0; --dth)
1203                 os << "\n\\end_deeper";
1204 }
1205
1206
1207 bool Text::read(Buffer const & buf, Lexer & lex, ErrorList & errorList)
1208 {
1209         depth_type depth = 0;
1210
1211         while (lex.isOK()) {
1212                 lex.nextToken();
1213                 string const token = lex.getString();
1214
1215                 if (token.empty())
1216                         continue;
1217
1218                 if (token == "\\end_inset")
1219                         break;
1220
1221                 if (token == "\\end_body")
1222                         continue;
1223
1224                 if (token == "\\begin_body")
1225                         continue;
1226
1227                 if (token == "\\end_document")
1228                         return false;
1229
1230                 if (token == "\\begin_layout") {
1231                         lex.pushToken(token);
1232
1233                         Paragraph par;
1234                         par.params().depth(depth);
1235                         par.setFont(0, Font(Font::ALL_INHERIT, buf.params().language));
1236                         pars_.push_back(par);
1237
1238                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1239                         // not BufferParams
1240                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
1241
1242                 } else if (token == "\\begin_deeper") {
1243                         ++depth;
1244                 } else if (token == "\\end_deeper") {
1245                         if (!depth) {
1246                                 lex.printError("\\end_deeper: " "depth is already null");
1247                         } else {
1248                                 --depth;
1249                         }
1250                 } else {
1251                         lyxerr << "Handling unknown body token: `"
1252                                << token << '\'' << endl;
1253                 }
1254         }
1255         return true;
1256 }
1257
1258 // Returns the current font and depth as a message.
1259 docstring Text::currentState(Cursor & cur)
1260 {
1261         BOOST_ASSERT(this == cur.text());
1262         Buffer & buf = cur.buffer();
1263         Paragraph const & par = cur.paragraph();
1264         odocstringstream os;
1265
1266         if (buf.params().trackChanges)
1267                 os << _("[Change Tracking] ");
1268
1269         Change change = par.lookupChange(cur.pos());
1270
1271         if (change.type != Change::UNCHANGED) {
1272                 Author const & a = buf.params().authors().get(change.author);
1273                 os << _("Change: ") << a.name();
1274                 if (!a.email().empty())
1275                         os << " (" << a.email() << ")";
1276                 // FIXME ctime is english, we should translate that
1277                 os << _(" at ") << ctime(&change.changetime);
1278                 os << " : ";
1279         }
1280
1281         // I think we should only show changes from the default
1282         // font. (Asger)
1283         // No, from the document font (MV)
1284         Font font = cur.real_current_font;
1285         font.reduce(buf.params().getFont());
1286
1287         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1288
1289         // The paragraph depth
1290         int depth = cur.paragraph().getDepth();
1291         if (depth > 0)
1292                 os << bformat(_(", Depth: %1$d"), depth);
1293
1294         // The paragraph spacing, but only if different from
1295         // buffer spacing.
1296         Spacing const & spacing = par.params().spacing();
1297         if (!spacing.isDefault()) {
1298                 os << _(", Spacing: ");
1299                 switch (spacing.getSpace()) {
1300                 case Spacing::Single:
1301                         os << _("Single");
1302                         break;
1303                 case Spacing::Onehalf:
1304                         os << _("OneHalf");
1305                         break;
1306                 case Spacing::Double:
1307                         os << _("Double");
1308                         break;
1309                 case Spacing::Other:
1310                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1311                         break;
1312                 case Spacing::Default:
1313                         // should never happen, do nothing
1314                         break;
1315                 }
1316         }
1317
1318 #ifdef DEVEL_VERSION
1319         os << _(", Inset: ") << &cur.inset();
1320         os << _(", Paragraph: ") << cur.pit();
1321         os << _(", Id: ") << par.id();
1322         os << _(", Position: ") << cur.pos();
1323         // FIXME: Why is the check for par.size() needed?
1324         // We are called with cur.pos() == par.size() quite often.
1325         if (!par.empty() && cur.pos() < par.size()) {
1326                 // Force output of code point, not character
1327                 size_t const c = par.getChar(cur.pos());
1328                 os << _(", Char: 0x") << std::hex << c;
1329         }
1330         os << _(", Boundary: ") << cur.boundary();
1331 //      Row & row = cur.textRow();
1332 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1333 #endif
1334         return os.str();
1335 }
1336
1337
1338 docstring Text::getPossibleLabel(Cursor & cur) const
1339 {
1340         pit_type pit = cur.pit();
1341
1342         LayoutPtr layout = pars_[pit].layout();
1343
1344         docstring text;
1345         docstring par_text = pars_[pit].asString(cur.buffer(), false);
1346         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1347                 if (par_text.empty())
1348                         break;
1349                 docstring head;
1350                 par_text = split(par_text, head, ' ');
1351                 // Is it legal to use spaces in labels ?
1352                 if (i > 0)
1353                         text += '-';
1354                 text += head;
1355         }
1356
1357         // No need for a prefix if the user said so.
1358         if (lyxrc.label_init_length <= 0)
1359                 return text;
1360
1361         // Will contain the label type.
1362         docstring name;
1363
1364         // For section, subsection, etc...
1365         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1366                 LayoutPtr const & layout2 = pars_[pit - 1].layout();
1367                 if (layout2->latextype != LATEX_PARAGRAPH) {
1368                         --pit;
1369                         layout = layout2;
1370                 }
1371         }
1372         if (layout->latextype != LATEX_PARAGRAPH)
1373                 name = from_ascii(layout->latexname());
1374
1375         // for captions, we just take the caption type
1376         Inset * caption_inset = cur.innerInsetOfType(Inset::CAPTION_CODE);
1377         if (caption_inset)
1378                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1379
1380         // If none of the above worked, we'll see if we're inside various
1381         // types of insets and take our abbreviation from them.
1382         if (name.empty()) {
1383                 Inset::Code const codes[] = {
1384                         Inset::FLOAT_CODE,
1385                         Inset::WRAP_CODE,
1386                         Inset::FOOT_CODE
1387                 };
1388                 for (unsigned int i = 0; i < (sizeof codes / sizeof codes[0]); ++i) {
1389                         Inset * float_inset = cur.innerInsetOfType(codes[i]);
1390                         if (float_inset) {
1391                                 name = float_inset->name();
1392                                 break;
1393                         }
1394                 }
1395         }
1396
1397         // Create a correct prefix for prettyref
1398         if (name == "theorem")
1399                 name = from_ascii("thm");
1400         else if (name == "Foot")
1401                 name = from_ascii("fn");
1402         else if (name == "listing")
1403                 name = from_ascii("lst");
1404
1405         if (!name.empty())
1406                 text = name.substr(0, 3) + ':' + text;
1407
1408         return text;
1409 }
1410
1411
1412 void Text::charsTranspose(Cursor & cur)
1413 {
1414         BOOST_ASSERT(this == cur.text());
1415
1416         pos_type pos = cur.pos();
1417
1418         // If cursor is at beginning or end of paragraph, do nothing.
1419         if (pos == cur.lastpos() || pos == 0)
1420                 return;
1421
1422         Paragraph & par = cur.paragraph();
1423
1424         // Get the positions of the characters to be transposed.
1425         pos_type pos1 = pos - 1;
1426         pos_type pos2 = pos;
1427
1428         // In change tracking mode, ignore deleted characters.
1429         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1430                 ++pos2;
1431         if (pos2 == cur.lastpos())
1432                 return;
1433
1434         while (pos1 >= 0 && par.isDeleted(pos1))
1435                 --pos1;
1436         if (pos1 < 0)
1437                 return;
1438
1439         // Don't do anything if one of the "characters" is not regular text.
1440         if (par.isInset(pos1) || par.isInset(pos2))
1441                 return;
1442
1443         // Store the characters to be transposed (including font information).
1444         char_type char1 = par.getChar(pos1);
1445         Font const font1 =
1446                 par.getFontSettings(cur.buffer().params(), pos1);
1447
1448         char_type char2 = par.getChar(pos2);
1449         Font const font2 =
1450                 par.getFontSettings(cur.buffer().params(), pos2);
1451
1452         // And finally, we are ready to perform the transposition.
1453         // Track the changes if Change Tracking is enabled.
1454         bool const trackChanges = cur.buffer().params().trackChanges;
1455
1456         recordUndo(cur);
1457
1458         par.eraseChar(pos2, trackChanges);
1459         par.eraseChar(pos1, trackChanges);
1460         par.insertChar(pos1, char2, font2, trackChanges);
1461         par.insertChar(pos2, char1, font1, trackChanges);
1462
1463         checkBufferStructure(cur.buffer(), cur);
1464
1465         // After the transposition, move cursor to after the transposition.
1466         setCursor(cur, cur.pit(), pos2);
1467         cur.forwardPos();
1468 }
1469
1470
1471 } // namespace lyx