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 "bufferview_funcs.h"
  29 #include "Cursor.h"
  30 #include "ParIterator.h"
  31 #include "CoordCache.h"
  32 #include "CutAndPaste.h"
  33 #include "debug.h"
  34 #include "DispatchResult.h"
  35 #include "Encoding.h"
  36 #include "ErrorList.h"
  37 #include "FuncRequest.h"
  38 #include "factory.h"
  39 #include "FontIterator.h"
  40 #include "gettext.h"
  41 #include "Language.h"
  42 #include "Color.h"
  43 #include "Length.h"
  44 #include "Lexer.h"
  45 #include "LyXRC.h"
  46 #include "Row.h"
  47 #include "MetricsInfo.h"
  48 #include "Paragraph.h"
  49 #include "paragraph_funcs.h"
  50 #include "ParagraphParameters.h"
  51 #include "Undo.h"
  52 #include "VSpace.h"
  53 #include "WordLangTuple.h"
  54
  55 #include "frontends/FontMetrics.h"
  56 #include "frontends/Painter.h"
  57
  58 #include "insets/InsetText.h"
  59 #include "insets/InsetBibitem.h"
  60 #include "insets/InsetCaption.h"
  61 #include "insets/InsetHFill.h"
  62 #include "insets/InsetLine.h"
  63 #include "insets/InsetNewline.h"
  64 #include "insets/InsetPagebreak.h"
  65 #include "insets/InsetOptArg.h"
  66 #include "insets/InsetSpace.h"
  67 #include "insets/InsetSpecialChar.h"
  68 #include "insets/InsetTabular.h"
  69
  70 #include "support/lstrings.h"
  71 #include "support/textutils.h"
  72 #include "support/convert.h"
  73
  74 #include <boost/current_function.hpp>
  75
  76 #include <sstream>
  77
  78 using std::auto_ptr;
  79 using std::advance;
  80 using std::distance;
  81 using std::max;
  82 using std::min;
  83 using std::endl;
  84 using std::string;
  85
  86 namespace lyx {
  87
  88 using support::bformat;
  89 using support::contains;
  90 using support::lowercase;
  91 using support::split;
  92 using support::uppercase;
  93
  94 using cap::cutSelection;
  95 using cap::pasteParagraphList;
  96
  97 using frontend::FontMetrics;
  98
  99 namespace {
 100
 101 void readParToken(Buffer const & buf, Paragraph & par, Lexer & lex,
 102         string const & token, Font & font, Change & change, ErrorList & errorList)
 103 {
 104         BufferParams const & bp = buf.params();
 105
 106         if (token[0] != '\\') {
 107 #if 0
 108                 string::const_iterator cit = token.begin();
 109                 for (; cit != token.end(); ++cit)
 110                         par.insertChar(par.size(), (*cit), font, change);
 111 #else
 112                 docstring dstr = lex.getDocString();
 113                 docstring::const_iterator cit = dstr.begin();
 114                 docstring::const_iterator cend = dstr.end();
 115                 for (; cit != cend; ++cit)
 116                         par.insertChar(par.size(), *cit, font, change);
 117 #endif
 118         } else if (token == "\\begin_layout") {
 119                 lex.eatLine();
 120                 docstring layoutname = lex.getDocString();
 121
 122                 font = Font(Font::ALL_INHERIT, bp.language);
 123                 change = Change(Change::UNCHANGED);
 124
 125                 TextClass const & tclass = bp.getTextClass();
 126
 127                 if (layoutname.empty()) {
 128                         layoutname = tclass.defaultLayoutName();
 129                 }
 130
 131                 bool hasLayout = tclass.hasLayout(layoutname);
 132
 133                 if (!hasLayout) {
 134                         errorList.push_back(ErrorItem(_("Unknown layout"),
 135                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 136                         layoutname, from_utf8(tclass.name())), par.id(), 0, par.size()));
 137                         layoutname = tclass.defaultLayoutName();
 138                 }
 139
 140                 par.layout(bp.getTextClass()[layoutname]);
 141
 142                 // Test whether the layout is obsolete.
 143                 LayoutPtr const & layout = par.layout();
 144                 if (!layout->obsoleted_by().empty())
 145                         par.layout(bp.getTextClass()[layout->obsoleted_by()]);
 146
 147                 par.params().read(lex);
 148
 149         } else if (token == "\\end_layout") {
 150                 lyxerr << BOOST_CURRENT_FUNCTION
 151                        << ": Solitary \\end_layout in line "
 152                        << lex.getLineNo() << "\n"
 153                        << "Missing \\begin_layout?.\n";
 154         } else if (token == "\\end_inset") {
 155                 lyxerr << BOOST_CURRENT_FUNCTION
 156                        << ": Solitary \\end_inset in line "
 157                        << lex.getLineNo() << "\n"
 158                        << "Missing \\begin_inset?.\n";
 159         } else if (token == "\\begin_inset") {
 160                 Inset * inset = readInset(lex, buf);
 161                 if (inset)
 162                         par.insertInset(par.size(), inset, font, change);
 163                 else {
 164                         lex.eatLine();
 165                         docstring line = lex.getDocString();
 166                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 167                                             par.id(), 0, par.size()));
 168                 }
 169         } else if (token == "\\family") {
 170                 lex.next();
 171                 font.setLyXFamily(lex.getString());
 172         } else if (token == "\\series") {
 173                 lex.next();
 174                 font.setLyXSeries(lex.getString());
 175         } else if (token == "\\shape") {
 176                 lex.next();
 177                 font.setLyXShape(lex.getString());
 178         } else if (token == "\\size") {
 179                 lex.next();
 180                 font.setLyXSize(lex.getString());
 181         } else if (token == "\\lang") {
 182                 lex.next();
 183                 string const tok = lex.getString();
 184                 Language const * lang = languages.getLanguage(tok);
 185                 if (lang) {
 186                         font.setLanguage(lang);
 187                 } else {
 188                         font.setLanguage(bp.language);
 189                         lex.printError("Unknown language `$$Token'");
 190                 }
 191         } else if (token == "\\numeric") {
 192                 lex.next();
 193                 font.setNumber(font.setLyXMisc(lex.getString()));
 194         } else if (token == "\\emph") {
 195                 lex.next();
 196                 font.setEmph(font.setLyXMisc(lex.getString()));
 197         } else if (token == "\\bar") {
 198                 lex.next();
 199                 string const tok = lex.getString();
 200
 201                 if (tok == "under")
 202                         font.setUnderbar(Font::ON);
 203                 else if (tok == "no")
 204                         font.setUnderbar(Font::OFF);
 205                 else if (tok == "default")
 206                         font.setUnderbar(Font::INHERIT);
 207                 else
 208                         lex.printError("Unknown bar font flag "
 209                                        "`$$Token'");
 210         } else if (token == "\\noun") {
 211                 lex.next();
 212                 font.setNoun(font.setLyXMisc(lex.getString()));
 213         } else if (token == "\\color") {
 214                 lex.next();
 215                 font.setLyXColor(lex.getString());
 216         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 217
 218                 // Insets don't make sense in a free-spacing context! ---Kayvan
 219                 if (par.isFreeSpacing()) {
 220                         if (token == "\\InsetSpace")
 221                                 par.insertChar(par.size(), ' ', font, change);
 222                         else if (lex.isOK()) {
 223                                 lex.next();
 224                                 string const next_token = lex.getString();
 225                                 if (next_token == "\\-")
 226                                         par.insertChar(par.size(), '-', font, change);
 227                                 else {
 228                                         lex.printError("Token `$$Token' "
 229                                                        "is in free space "
 230                                                        "paragraph layout!");
 231                                 }
 232                         }
 233                 } else {
 234                         auto_ptr<Inset> inset;
 235                         if (token == "\\SpecialChar" )
 236                                 inset.reset(new InsetSpecialChar);
 237                         else
 238                                 inset.reset(new InsetSpace);
 239                         inset->read(buf, lex);
 240                         par.insertInset(par.size(), inset.release(),
 241                                         font, change);
 242                 }
 243         } else if (token == "\\backslash") {
 244                 par.insertChar(par.size(), '\\', font, change);
 245         } else if (token == "\\newline") {
 246                 auto_ptr<Inset> inset(new InsetNewline);
 247                 inset->read(buf, lex);
 248                 par.insertInset(par.size(), inset.release(), font, change);
 249         } else if (token == "\\LyXTable") {
 250                 auto_ptr<Inset> inset(new InsetTabular(buf));
 251                 inset->read(buf, lex);
 252                 par.insertInset(par.size(), inset.release(), font, change);
 253         } else if (token == "\\hfill") {
 254                 par.insertInset(par.size(), new InsetHFill, font, change);
 255         } else if (token == "\\lyxline") {
 256                 par.insertInset(par.size(), new InsetLine, font, change);
 257         } else if (token == "\\newpage") {
 258                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 259         } else if (token == "\\clearpage") {
 260                 par.insertInset(par.size(), new InsetClearPage, font, change);
 261         } else if (token == "\\cleardoublepage") {
 262                 par.insertInset(par.size(), new InsetClearDoublePage, font, change);
 263         } else if (token == "\\change_unchanged") {
 264                 change = Change(Change::UNCHANGED);
 265         } else if (token == "\\change_inserted") {
 266                 lex.eatLine();
 267                 std::istringstream is(lex.getString());
 268                 unsigned int aid;
 269                 time_type ct;
 270                 is >> aid >> ct;
 271                 if (aid >= bp.author_map.size()) {
 272                         errorList.push_back(ErrorItem(_("Change tracking error"),
 273                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 274                                             par.id(), 0, par.size()));
 275                         change = Change(Change::UNCHANGED);
 276                 } else
 277                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 278         } else if (token == "\\change_deleted") {
 279                 lex.eatLine();
 280                 std::istringstream is(lex.getString());
 281                 unsigned int aid;
 282                 time_type ct;
 283                 is >> aid >> ct;
 284                 if (aid >= bp.author_map.size()) {
 285                         errorList.push_back(ErrorItem(_("Change tracking error"),
 286                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 287                                             par.id(), 0, par.size()));
 288                         change = Change(Change::UNCHANGED);
 289                 } else
 290                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 291         } else {
 292                 lex.eatLine();
 293                 errorList.push_back(ErrorItem(_("Unknown token"),
 294                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 295                         lex.getDocString()),
 296                         par.id(), 0, par.size()));
 297         }
 298 }
 299
 300
 301 void readParagraph(Buffer const & buf, Paragraph & par, Lexer & lex,
 302         ErrorList & errorList)
 303 {
 304         lex.nextToken();
 305         string token = lex.getString();
 306         Font font;
 307         Change change(Change::UNCHANGED);
 308
 309         while (lex.isOK()) {
 310                 readParToken(buf, par, lex, token, font, change, errorList);
 311
 312                 lex.nextToken();
 313                 token = lex.getString();
 314
 315                 if (token.empty())
 316                         continue;
 317
 318                 if (token == "\\end_layout") {
 319                         //Ok, paragraph finished
 320                         break;
 321                 }
 322
 323                 LYXERR(Debug::PARSER) << "Handling paragraph token: `"
 324                                       << token << '\'' << endl;
 325                 if (token == "\\begin_layout" || token == "\\end_document"
 326                     || token == "\\end_inset" || token == "\\begin_deeper"
 327                     || token == "\\end_deeper") {
 328                         lex.pushToken(token);
 329                         lyxerr << "Paragraph ended in line "
 330                                << lex.getLineNo() << "\n"
 331                                << "Missing \\end_layout.\n";
 332                         break;
 333                 }
 334         }
 335         // Final change goes to paragraph break:
 336         par.setChange(par.size(), change);
 337
 338         // Initialize begin_of_body_ on load; redoParagraph maintains
 339         par.setBeginOfBody();
 340 }
 341
 342
 343 } // namespace anon
 344
 345
 346 bool Text::empty() const
 347 {
 348         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 349                 // FIXME: Should we consider the labeled type as empty too?
 350                 && pars_[0].layout()->labeltype == LABEL_NO_LABEL);
 351 }
 352
 353
 354 double Text::spacing(Buffer const & buffer,
 355                 Paragraph const & par) const
 356 {
 357         if (par.params().spacing().isDefault())
 358                 return buffer.params().spacing().getValue();
 359         return par.params().spacing().getValue();
 360 }
 361
 362
 363 Color_color Text::backgroundColor() const
 364 {
 365         return Color_color(Color::color(background_color_));
 366 }
 367
 368
 369 void Text::breakParagraph(Cursor & cur, bool keep_layout)
 370 {
 371         BOOST_ASSERT(this == cur.text());
 372
 373         Paragraph & cpar = cur.paragraph();
 374         pit_type cpit = cur.pit();
 375
 376         TextClass const & tclass = cur.buffer().params().getTextClass();
 377         LayoutPtr const & layout = cpar.layout();
 378
 379         // this is only allowed, if the current paragraph is not empty
 380         // or caption and if it has not the keepempty flag active
 381         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 382             layout->labeltype != LABEL_SENSITIVE)
 383                 return;
 384
 385         // a layout change may affect also the following paragraph
 386         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 387
 388         // Always break behind a space
 389         // It is better to erase the space (Dekel)
 390         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 391                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
 392
 393         // What should the layout for the new paragraph be?
 394         int preserve_layout = 0;
 395         if (keep_layout)
 396                 preserve_layout = 2;
 397         else
 398                 preserve_layout = layout->isEnvironment();
 399
 400         // We need to remember this before we break the paragraph, because
 401         // that invalidates the layout variable
 402         bool sensitive = layout->labeltype == LABEL_SENSITIVE;
 403
 404         // we need to set this before we insert the paragraph.
 405         bool const isempty = cpar.allowEmpty() && cpar.empty();
 406
 407         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
 408                          cur.pos(), preserve_layout);
 409
 410         // After this, neither paragraph contains any rows!
 411
 412         cpit = cur.pit();
 413         pit_type next_par = cpit + 1;
 414
 415         // well this is the caption hack since one caption is really enough
 416         if (sensitive) {
 417                 if (cur.pos() == 0)
 418                         // set to standard-layout
 419                         pars_[cpit].applyLayout(tclass.defaultLayout());
 420                 else
 421                         // set to standard-layout
 422                         pars_[next_par].applyLayout(tclass.defaultLayout());
 423         }
 424
 425         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 426                 if (!pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges))
 427                         break; // the character couldn't be deleted physically due to change tracking
 428         }
 429
 430         updateLabels(cur.buffer());
 431
 432         // A singlePar update is not enough in this case.
 433         cur.updateFlags(Update::Force);
 434
 435         // This check is necessary. Otherwise the new empty paragraph will
 436         // be deleted automatically. And it is more friendly for the user!
 437         if (cur.pos() != 0 || isempty)
 438                 setCursor(cur, cur.pit() + 1, 0);
 439         else
 440                 setCursor(cur, cur.pit(), 0);
 441 }
 442
 443
 444 // insert a character, moves all the following breaks in the
 445 // same Paragraph one to the right and make a rebreak
 446 void Text::insertChar(Cursor & cur, char_type c)
 447 {
 448         BOOST_ASSERT(this == cur.text());
 449         BOOST_ASSERT(c != Paragraph::META_INSET);
 450
 451         recordUndo(cur, Undo::INSERT);
 452
 453         Buffer const & buffer = cur.buffer();
 454         Paragraph & par = cur.paragraph();
 455         // try to remove this
 456         pit_type const pit = cur.pit();
 457
 458         bool const freeSpacing = par.layout()->free_spacing ||
 459                 par.isFreeSpacing();
 460
 461         if (lyxrc.auto_number) {
 462                 static docstring const number_operators = from_ascii("+-/*");
 463                 static docstring const number_unary_operators = from_ascii("+-");
 464                 static docstring const number_seperators = from_ascii(".,:");
 465
 466                 if (current_font.number() == Font::ON) {
 467                         if (!isDigit(c) && !contains(number_operators, c) &&
 468                             !(contains(number_seperators, c) &&
 469                               cur.pos() != 0 &&
 470                               cur.pos() != cur.lastpos() &&
 471                               getFont(buffer, par, cur.pos()).number() == Font::ON &&
 472                               getFont(buffer, par, cur.pos() - 1).number() == Font::ON)
 473                            )
 474                                 number(cur); // Set current_font.number to OFF
 475                 } else if (isDigit(c) &&
 476                            real_current_font.isVisibleRightToLeft()) {
 477                         number(cur); // Set current_font.number to ON
 478
 479                         if (cur.pos() != 0) {
 480                                 char_type const c = par.getChar(cur.pos() - 1);
 481                                 if (contains(number_unary_operators, c) &&
 482                                     (cur.pos() == 1
 483                                      || par.isSeparator(cur.pos() - 2)
 484                                      || par.isNewline(cur.pos() - 2))
 485                                   ) {
 486                                         setCharFont(buffer, pit, cur.pos() - 1, current_font);
 487                                 } else if (contains(number_seperators, c)
 488                                      && cur.pos() >= 2
 489                                      && getFont(buffer, par, cur.pos() - 2).number() == Font::ON) {
 490                                         setCharFont(buffer, pit, cur.pos() - 1, current_font);
 491                                 }
 492                         }
 493                 }
 494         }
 495
 496         // In Bidi text, we want spaces to be treated in a special way: spaces
 497         // which are between words in different languages should get the
 498         // paragraph's language; otherwise, spaces should keep the language
 499         // they were originally typed in. This is only in effect while typing;
 500         // after the text is already typed in, the user can always go back and
 501         // explicitly set the language of a space as desired. But 99.9% of the
 502         // time, what we're doing here is what the user actually meant.
 503         //
 504         // The following cases are the ones in which the language of the space
 505         // should be changed to match that of the containing paragraph. In the
 506         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 507         // represents a space, pipe (|) represents the cursor position (so the
 508         // character before it is the one just typed in). The different cases
 509         // are depicted logically (not visually), from left to right:
 510         //
 511         // 1. A_a|
 512         // 2. a_A|
 513         //
 514         // Theoretically, there are other situations that we should, perhaps, deal
 515         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 516         // point (to understand why, just try to create this situation...).
 517
 518         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 519                 // get font in front and behind the space in question. But do NOT
 520                 // use getFont(cur.pos()) because the character c is not inserted yet
 521                 Font const & pre_space_font  = getFont(buffer, par, cur.pos() - 2);
 522                 Font const & post_space_font = real_current_font;
 523                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 524                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 525
 526                 if (pre_space_rtl != post_space_rtl) {
 527                         // Set the space's language to match the language of the
 528                         // adjacent character whose direction is the paragraph's
 529                         // direction; don't touch other properties of the font
 530                         Language const * lang =
 531                                 (pre_space_rtl == par.isRightToLeftPar(buffer.params())) ?
 532                                 pre_space_font.language() : post_space_font.language();
 533
 534                         Font space_font = getFont(buffer, par, cur.pos() - 1);
 535                         space_font.setLanguage(lang);
 536                         par.setFont(cur.pos() - 1, space_font);
 537                 }
 538         }
 539
 540         // Next check, if there will be two blanks together or a blank at
 541         // the beginning of a paragraph.
 542         // I decided to handle blanks like normal characters, the main
 543         // difference are the special checks when calculating the row.fill
 544         // (blank does not count at the end of a row) and the check here
 545
 546         // When the free-spacing option is set for the current layout,
 547         // disable the double-space checking
 548         if (!freeSpacing && isLineSeparatorChar(c)) {
 549                 if (cur.pos() == 0) {
 550                         static bool sent_space_message = false;
 551                         if (!sent_space_message) {
 552                                 cur.message(_("You cannot insert a space at the "
 553                                                            "beginning of a paragraph. Please read the Tutorial."));
 554                                 sent_space_message = true;
 555                         }
 556                         return;
 557                 }
 558                 BOOST_ASSERT(cur.pos() > 0);
 559                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 560                     && !par.isDeleted(cur.pos() - 1)) {
 561                         static bool sent_space_message = false;
 562                         if (!sent_space_message) {
 563                                 cur.message(_("You cannot type two spaces this way. "
 564                                                            "Please read the Tutorial."));
 565                                 sent_space_message = true;
 566                         }
 567                         return;
 568                 }
 569         }
 570
 571         par.insertChar(cur.pos(), c, current_font, cur.buffer().params().trackChanges);
 572         checkBufferStructure(cur.buffer(), cur);
 573
 574 //              cur.updateFlags(Update::Force);
 575         setCursor(cur.top(), cur.pit(), cur.pos() + 1);
 576         charInserted();
 577 }
 578
 579
 580 void Text::charInserted()
 581 {
 582         // Here we call finishUndo for every 20 characters inserted.
 583         // This is from my experience how emacs does it. (Lgb)
 584         static unsigned int counter;
 585         if (counter < 20) {
 586                 ++counter;
 587         } else {
 588                 finishUndo();
 589                 counter = 0;
 590         }
 591 }
 592
 593
 594 // the cursor set functions have a special mechanism. When they
 595 // realize, that you left an empty paragraph, they will delete it.
 596
 597 bool Text::cursorRightOneWord(Cursor & cur)
 598 {
 599         BOOST_ASSERT(this == cur.text());
 600
 601         Cursor old = cur;
 602
 603         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
 604                 ++old.pit();
 605                 old.pos() = 0;
 606         } else {
 607                 // Advance through word.
 608                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
 609                         ++old.pos();
 610                 // Skip through trailing nonword stuff.
 611                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
 612                         ++old.pos();
 613         }
 614         return setCursor(cur, old.pit(), old.pos());
 615 }
 616
 617
 618 bool Text::cursorLeftOneWord(Cursor & cur)
 619 {
 620         BOOST_ASSERT(this == cur.text());
 621
 622         Cursor old = cur;
 623
 624         if (old.pos() == 0 && old.pit() != 0) {
 625                 --old.pit();
 626                 old.pos() = old.lastpos();
 627         } else {
 628                 // Skip through initial nonword stuff.
 629                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
 630                         --old.pos();
 631                 // Advance through word.
 632                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
 633                         --old.pos();
 634         }
 635         return setCursor(cur, old.pit(), old.pos());
 636 }
 637
 638
 639 void Text::selectWord(Cursor & cur, word_location loc)
 640 {
 641         BOOST_ASSERT(this == cur.text());
 642         CursorSlice from = cur.top();
 643         CursorSlice to = cur.top();
 644         getWord(from, to, loc);
 645         if (cur.top() != from)
 646                 setCursor(cur, from.pit(), from.pos());
 647         if (to == from)
 648                 return;
 649         cur.resetAnchor();
 650         setCursor(cur, to.pit(), to.pos());
 651         cur.setSelection();
 652 }
 653
 654
 655 // Select the word currently under the cursor when no
 656 // selection is currently set
 657 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
 658 {
 659         BOOST_ASSERT(this == cur.text());
 660         if (cur.selection())
 661                 return false;
 662         selectWord(cur, loc);
 663         return cur.selection();
 664 }
 665
 666
 667 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
 668 {
 669         BOOST_ASSERT(this == cur.text());
 670
 671         if (!cur.selection())
 672                 return;
 673
 674         recordUndoSelection(cur, Undo::ATOMIC);
 675
 676         pit_type begPit = cur.selectionBegin().pit();
 677         pit_type endPit = cur.selectionEnd().pit();
 678
 679         pos_type begPos = cur.selectionBegin().pos();
 680         pos_type endPos = cur.selectionEnd().pos();
 681
 682         // keep selection info, because endPos becomes invalid after the first loop
 683         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
 684
 685         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
 686
 687         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 688                 pos_type parSize = pars_[pit].size();
 689
 690                 // ignore empty paragraphs; otherwise, an assertion will fail for
 691                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
 692                 if (parSize == 0)
 693                         continue;
 694
 695                 // do not consider first paragraph if the cursor starts at pos size()
 696                 if (pit == begPit && begPos == parSize)
 697                         continue;
 698
 699                 // do not consider last paragraph if the cursor ends at pos 0
 700                 if (pit == endPit && endPos == 0)
 701                         break; // last iteration anyway
 702
 703                 pos_type left  = (pit == begPit ? begPos : 0);
 704                 pos_type right = (pit == endPit ? endPos : parSize);
 705
 706                 if (op == ACCEPT) {
 707                         pars_[pit].acceptChanges(cur.buffer().params(), left, right);
 708                 } else {
 709                         pars_[pit].rejectChanges(cur.buffer().params(), left, right);
 710                 }
 711         }
 712
 713         // next, accept/reject imaginary end-of-par characters
 714
 715         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 716                 pos_type pos = pars_[pit].size();
 717
 718                 // skip if the selection ends before the end-of-par
 719                 if (pit == endPit && endsBeforeEndOfPar)
 720                         break; // last iteration anyway
 721
 722                 // skip if this is not the last paragraph of the document
 723                 // note: the user should be able to accept/reject the par break of the last par!
 724                 if (pit == endPit && pit + 1 != int(pars_.size()))
 725                         break; // last iteration anway
 726
 727                 if (op == ACCEPT) {
 728                         if (pars_[pit].isInserted(pos)) {
 729                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 730                         } else if (pars_[pit].isDeleted(pos)) {
 731                                 if (pit + 1 == int(pars_.size())) {
 732                                         // we cannot remove a par break at the end of the last paragraph;
 733                                         // instead, we mark it unchanged
 734                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 735                                 } else {
 736                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 737                                         --endPit;
 738                                         --pit;
 739                                 }
 740                         }
 741                 } else {
 742                         if (pars_[pit].isDeleted(pos)) {
 743                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 744                         } else if (pars_[pit].isInserted(pos)) {
 745                                 if (pit + 1 == int(pars_.size())) {
 746                                         // we mark the par break at the end of the last paragraph unchanged
 747                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 748                                 } else {
 749                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 750                                         --endPit;
 751                                         --pit;
 752                                 }
 753                         }
 754                 }
 755         }
 756
 757         // finally, invoke the DEPM
 758
 759         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer().params().trackChanges);
 760
 761         //
 762
 763         finishUndo();
 764         cur.clearSelection();
 765         setCursorIntern(cur, begPit, begPos);
 766         cur.updateFlags(Update::Force);
 767         updateLabels(cur.buffer());
 768 }
 769
 770
 771 void Text::acceptChanges(BufferParams const & bparams)
 772 {
 773         lyx::acceptChanges(pars_, bparams);
 774         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
 775 }
 776
 777
 778 void Text::rejectChanges(BufferParams const & bparams)
 779 {
 780         pit_type pars_size = static_cast<pit_type>(pars_.size());
 781
 782         // first, reject changes within each individual paragraph
 783         // (do not consider end-of-par)
 784         for (pit_type pit = 0; pit < pars_size; ++pit) {
 785                 if (!pars_[pit].empty())   // prevent assertion failure
 786                         pars_[pit].rejectChanges(bparams, 0, pars_[pit].size());
 787         }
 788
 789         // next, reject imaginary end-of-par characters
 790         for (pit_type pit = 0; pit < pars_size; ++pit) {
 791                 pos_type pos = pars_[pit].size();
 792
 793                 if (pars_[pit].isDeleted(pos)) {
 794                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 795                 } else if (pars_[pit].isInserted(pos)) {
 796                         if (pit == pars_size - 1) {
 797                                 // we mark the par break at the end of the last
 798                                 // paragraph unchanged
 799                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 800                         } else {
 801                                 mergeParagraph(bparams, pars_, pit);
 802                                 --pit;
 803                                 --pars_size;
 804                         }
 805                 }
 806         }
 807
 808         // finally, invoke the DEPM
 809         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
 810 }
 811
 812
 813 void Text::deleteWordForward(Cursor & cur)
 814 {
 815         BOOST_ASSERT(this == cur.text());
 816         if (cur.lastpos() == 0)
 817                 cursorRight(cur);
 818         else {
 819                 cur.resetAnchor();
 820                 cur.selection() = true;
 821                 cursorRightOneWord(cur);
 822                 cur.setSelection();
 823                 cutSelection(cur, true, false);
 824                 checkBufferStructure(cur.buffer(), cur);
 825         }
 826 }
 827
 828
 829 void Text::deleteWordBackward(Cursor & cur)
 830 {
 831         BOOST_ASSERT(this == cur.text());
 832         if (cur.lastpos() == 0)
 833                 cursorLeft(cur);
 834         else {
 835                 cur.resetAnchor();
 836                 cur.selection() = true;
 837                 cursorLeftOneWord(cur);
 838                 cur.setSelection();
 839                 cutSelection(cur, true, false);
 840                 checkBufferStructure(cur.buffer(), cur);
 841         }
 842 }
 843
 844
 845 // Kill to end of line.
 846 void Text::changeCase(Cursor & cur, Text::TextCase action)
 847 {
 848         BOOST_ASSERT(this == cur.text());
 849         CursorSlice from;
 850         CursorSlice to;
 851
 852         if (cur.selection()) {
 853                 from = cur.selBegin();
 854                 to = cur.selEnd();
 855         } else {
 856                 from = cur.top();
 857                 getWord(from, to, PARTIAL_WORD);
 858                 cursorRightOneWord(cur);
 859         }
 860
 861         recordUndoSelection(cur, Undo::ATOMIC);
 862
 863         pit_type begPit = from.pit();
 864         pit_type endPit = to.pit();
 865
 866         pos_type begPos = from.pos();
 867         pos_type endPos = to.pos();
 868
 869         bool const trackChanges = cur.buffer().params().trackChanges;
 870
 871         pos_type right = 0; // needed after the for loop
 872
 873         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 874                 pos_type parSize = pars_[pit].size();
 875
 876                 pos_type pos = (pit == begPit ? begPos : 0);
 877                 right = (pit == endPit ? endPos : parSize);
 878
 879                 // process sequences of modified characters; in change
 880                 // tracking mode, this approach results in much better
 881                 // usability than changing case on a char-by-char basis
 882                 docstring changes;
 883
 884                 bool capitalize = true;
 885
 886                 for (; pos < right; ++pos) {
 887                         char_type oldChar = pars_[pit].getChar(pos);
 888                         char_type newChar = oldChar;
 889
 890                         // ignore insets and don't play with deleted text!
 891                         if (oldChar != Paragraph::META_INSET && !pars_[pit].isDeleted(pos)) {
 892                                 switch (action) {
 893                                 case text_lowercase:
 894                                         newChar = lowercase(oldChar);
 895                                         break;
 896                                 case text_capitalization:
 897                                         if (capitalize) {
 898                                                 newChar = uppercase(oldChar);
 899                                                 capitalize = false;
 900                                         }
 901                                         break;
 902                                 case text_uppercase:
 903                                         newChar = uppercase(oldChar);
 904                                         break;
 905                                 }
 906                         }
 907
 908                         if (!pars_[pit].isLetter(pos) || pars_[pit].isDeleted(pos)) {
 909                                 capitalize = true; // permit capitalization again
 910                         }
 911
 912                         if (oldChar != newChar) {
 913                                 changes += newChar;
 914                         }
 915
 916                         if (oldChar == newChar || pos == right - 1) {
 917                                 if (oldChar != newChar) {
 918                                         pos++; // step behind the changing area
 919                                 }
 920                                 int erasePos = pos - changes.size();
 921                                 for (size_t i = 0; i < changes.size(); i++) {
 922                                         pars_[pit].insertChar(pos, changes[i],
 923                                                 pars_[pit].getFontSettings(cur.buffer().params(),
 924                                                                 erasePos),
 925                                                 trackChanges);
 926                                         if (!pars_[pit].eraseChar(erasePos, trackChanges)) {
 927                                                 ++erasePos;
 928                                                 ++pos; // advance
 929                                                 ++right; // expand selection
 930                                         }
 931                                 }
 932                                 changes.clear();
 933                         }
 934                 }
 935         }
 936
 937         // the selection may have changed due to logically-only deleted chars
 938         setCursor(cur, begPit, begPos);
 939         cur.resetAnchor();
 940         setCursor(cur, endPit, right);
 941         cur.setSelection();
 942
 943         checkBufferStructure(cur.buffer(), cur);
 944 }
 945
 946
 947 bool Text::handleBibitems(Cursor & cur)
 948 {
 949         if (cur.paragraph().layout()->labeltype != LABEL_BIBLIO)
 950                 return false;
 951         // if a bibitem is deleted, merge with previous paragraph
 952         // if this is a bibliography item as well
 953         if (cur.pos() == 0) {
 954                 BufferParams const & bufparams = cur.buffer().params();
 955                 Paragraph const & par = cur.paragraph();
 956                 Cursor prevcur = cur;
 957                 if (cur.pit() > 0) {
 958                         --prevcur.pit();
 959                         prevcur.pos() = prevcur.lastpos();
 960                 }
 961                 Paragraph const & prevpar = prevcur.paragraph();
 962                 if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
 963                         recordUndo(cur, Undo::ATOMIC, prevcur.pit());
 964                         mergeParagraph(bufparams, cur.text()->paragraphs(),
 965                                        prevcur.pit());
 966                         updateLabels(cur.buffer());
 967                         setCursorIntern(cur, prevcur.pit(), prevcur.pos());
 968                         cur.updateFlags(Update::Force);
 969                 // if not, reset the paragraph to default
 970                 } else
 971                         cur.paragraph().layout(
 972                                 bufparams.getTextClass().defaultLayout());
 973                 return true;
 974         }
 975         return false;
 976 }
 977
 978
 979 bool Text::erase(Cursor & cur)
 980 {
 981         BOOST_ASSERT(this == cur.text());
 982         bool needsUpdate = false;
 983         Paragraph & par = cur.paragraph();
 984
 985         if (cur.pos() != cur.lastpos()) {
 986                 // this is the code for a normal delete, not pasting
 987                 // any paragraphs
 988                 recordUndo(cur, Undo::DELETE);
 989                 if(!par.eraseChar(cur.pos(), cur.buffer().params().trackChanges)) {
 990                         // the character has been logically deleted only => skip it
 991                         cur.top().forwardPos();
 992                 }
 993                 checkBufferStructure(cur.buffer(), cur);
 994                 needsUpdate = true;
 995         } else {
 996                 if (cur.pit() == cur.lastpit())
 997                         return dissolveInset(cur);
 998
 999                 if (!par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1000                         par.setChange(cur.pos(), Change(Change::DELETED));
1001                         cur.forwardPos();
1002                         needsUpdate = true;
1003                 } else {
1004                         setCursorIntern(cur, cur.pit() + 1, 0);
1005                         needsUpdate = backspacePos0(cur);
1006                 }
1007         }
1008
1009         needsUpdate |= handleBibitems(cur);
1010
1011         if (needsUpdate) {
1012                 // Make sure the cursor is correct. Is this really needed?
1013                 // No, not really... at least not here!
1014                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
1015                 checkBufferStructure(cur.buffer(), cur);
1016         }
1017
1018         return needsUpdate;
1019 }
1020
1021
1022 bool Text::backspacePos0(Cursor & cur)
1023 {
1024         BOOST_ASSERT(this == cur.text());
1025         if (cur.pit() == 0)
1026                 return false;
1027
1028         bool needsUpdate = false;
1029
1030         BufferParams const & bufparams = cur.buffer().params();
1031         TextClass const & tclass = bufparams.getTextClass();
1032         ParagraphList & plist = cur.text()->paragraphs();
1033         Paragraph const & par = cur.paragraph();
1034         Cursor prevcur = cur;
1035         --prevcur.pit();
1036         prevcur.pos() = prevcur.lastpos();
1037         Paragraph const & prevpar = prevcur.paragraph();
1038
1039         // is it an empty paragraph?
1040         if (cur.lastpos() == 0
1041             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1042                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1043                 plist.erase(boost::next(plist.begin(), cur.pit()));
1044                 needsUpdate = true;
1045         }
1046         // is previous par empty?
1047         else if (prevcur.lastpos() == 0
1048                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1049                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1050                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1051                 needsUpdate = true;
1052         }
1053         // Pasting is not allowed, if the paragraphs have different
1054         // layouts. I think it is a real bug of all other
1055         // word processors to allow it. It confuses the user.
1056         // Correction: Pasting is always allowed with standard-layout
1057         else if (par.layout() == prevpar.layout()
1058                  || par.layout() == tclass.defaultLayout()) {
1059                 recordUndo(cur, Undo::ATOMIC, prevcur.pit());
1060                 mergeParagraph(bufparams, plist, prevcur.pit());
1061                 needsUpdate = true;
1062         }
1063
1064         if (needsUpdate) {
1065                 updateLabels(cur.buffer());
1066                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1067         }
1068
1069         return needsUpdate;
1070 }
1071
1072
1073 bool Text::backspace(Cursor & cur)
1074 {
1075         BOOST_ASSERT(this == cur.text());
1076         bool needsUpdate = false;
1077         if (cur.pos() == 0) {
1078                 if (cur.pit() == 0)
1079                         return dissolveInset(cur);
1080
1081                 Paragraph & prev_par = pars_[cur.pit() - 1];
1082
1083                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1084                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1085                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1086                         return true;
1087                 }
1088                 // The cursor is at the beginning of a paragraph, so
1089                 // the backspace will collapse two paragraphs into one.
1090                 needsUpdate = backspacePos0(cur);
1091
1092         } else {
1093                 // this is the code for a normal backspace, not pasting
1094                 // any paragraphs
1095                 recordUndo(cur, Undo::DELETE);
1096                 // We used to do cursorLeftIntern() here, but it is
1097                 // not a good idea since it triggers the auto-delete
1098                 // mechanism. So we do a cursorLeftIntern()-lite,
1099                 // without the dreaded mechanism. (JMarc)
1100                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1101                                 false, cur.boundary());
1102                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1103                 checkBufferStructure(cur.buffer(), cur);
1104         }
1105
1106         if (cur.pos() == cur.lastpos())
1107                 setCurrentFont(cur);
1108
1109         needsUpdate |= handleBibitems(cur);
1110
1111         // A singlePar update is not enough in this case.
1112 //              cur.updateFlags(Update::Force);
1113         setCursor(cur.top(), cur.pit(), cur.pos());
1114
1115         return needsUpdate;
1116 }
1117
1118
1119 bool Text::dissolveInset(Cursor & cur) {
1120         BOOST_ASSERT(this == cur.text());
1121
1122         if (isMainText(cur.bv().buffer()) || cur.inset().nargs() != 1)
1123                 return false;
1124
1125         recordUndoInset(cur);
1126         cur.selHandle(false);
1127         // save position
1128         pos_type spos = cur.pos();
1129         pit_type spit = cur.pit();
1130         ParagraphList plist;
1131         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1132                 plist = paragraphs();
1133         cur.popLeft();
1134         // store cursor offset
1135         if (spit == 0)
1136                 spos += cur.pos();
1137         spit += cur.pit();
1138         Buffer & b = cur.buffer();
1139         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1140         if (!plist.empty()) {
1141                 // ERT paragraphs have the Language latex_language.
1142                 // This is invalid outside of ERT, so we need to
1143                 // change it to the buffer language.
1144                 ParagraphList::iterator it = plist.begin();
1145                 ParagraphList::iterator it_end = plist.end();
1146                 for (; it != it_end; it++) {
1147                         it->changeLanguage(b.params(), latex_language,
1148                                         b.getLanguage());
1149                 }
1150
1151                 pasteParagraphList(cur, plist, b.params().getTextClass_ptr(),
1152                                    b.errorList("Paste"));
1153                 // restore position
1154                 cur.pit() = std::min(cur.lastpit(), spit);
1155                 cur.pos() = std::min(cur.lastpos(), spos);
1156         }
1157         cur.clearSelection();
1158         cur.resetAnchor();
1159         return true;
1160 }
1161
1162
1163 bool Text::isLastRow(pit_type pit, Row const & row) const
1164 {
1165         return row.endpos() >= pars_[pit].size()
1166                 && pit + 1 == pit_type(paragraphs().size());
1167 }
1168
1169
1170 bool Text::isFirstRow(pit_type pit, Row const & row) const
1171 {
1172         return row.pos() == 0 && pit == 0;
1173 }
1174
1175
1176 void Text::getWord(CursorSlice & from, CursorSlice & to,
1177         word_location const loc)
1178 {
1179         Paragraph const & from_par = pars_[from.pit()];
1180         switch (loc) {
1181         case WHOLE_WORD_STRICT:
1182                 if (from.pos() == 0 || from.pos() == from_par.size()
1183                     || !from_par.isLetter(from.pos())
1184                     || !from_par.isLetter(from.pos() - 1)) {
1185                         to = from;
1186                         return;
1187                 }
1188                 // no break here, we go to the next
1189
1190         case WHOLE_WORD:
1191                 // If we are already at the beginning of a word, do nothing
1192                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1193                         break;
1194                 // no break here, we go to the next
1195
1196         case PREVIOUS_WORD:
1197                 // always move the cursor to the beginning of previous word
1198                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1199                         --from.pos();
1200                 break;
1201         case NEXT_WORD:
1202                 lyxerr << "Text::getWord: NEXT_WORD not implemented yet"
1203                        << endl;
1204                 break;
1205         case PARTIAL_WORD:
1206                 // no need to move the 'from' cursor
1207                 break;
1208         }
1209         to = from;
1210         Paragraph & to_par = pars_[to.pit()];
1211         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1212                 ++to.pos();
1213 }
1214
1215
1216 void Text::write(Buffer const & buf, std::ostream & os) const
1217 {
1218         ParagraphList::const_iterator pit = paragraphs().begin();
1219         ParagraphList::const_iterator end = paragraphs().end();
1220         depth_type dth = 0;
1221         for (; pit != end; ++pit)
1222                 pit->write(buf, os, buf.params(), dth);
1223
1224         // Close begin_deeper
1225         for(; dth > 0; --dth)
1226                 os << "\n\\end_deeper";
1227 }
1228
1229
1230 bool Text::read(Buffer const & buf, Lexer & lex, ErrorList & errorList)
1231 {
1232         depth_type depth = 0;
1233
1234         while (lex.isOK()) {
1235                 lex.nextToken();
1236                 string const token = lex.getString();
1237
1238                 if (token.empty())
1239                         continue;
1240
1241                 if (token == "\\end_inset")
1242                         break;
1243
1244                 if (token == "\\end_body")
1245                         continue;
1246
1247                 if (token == "\\begin_body")
1248                         continue;
1249
1250                 if (token == "\\end_document")
1251                         return false;
1252
1253                 if (token == "\\begin_layout") {
1254                         lex.pushToken(token);
1255
1256                         Paragraph par;
1257                         par.params().depth(depth);
1258                         par.setFont(0, Font(Font::ALL_INHERIT, buf.params().language));
1259                         pars_.push_back(par);
1260
1261                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1262                         // not BufferParams
1263                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
1264
1265                 } else if (token == "\\begin_deeper") {
1266                         ++depth;
1267                 } else if (token == "\\end_deeper") {
1268                         if (!depth) {
1269                                 lex.printError("\\end_deeper: " "depth is already null");
1270                         } else {
1271                                 --depth;
1272                         }
1273                 } else {
1274                         lyxerr << "Handling unknown body token: `"
1275                                << token << '\'' << endl;
1276                 }
1277         }
1278         return true;
1279 }
1280
1281 // Returns the current font and depth as a message.
1282 docstring Text::currentState(Cursor & cur)
1283 {
1284         BOOST_ASSERT(this == cur.text());
1285         Buffer & buf = cur.buffer();
1286         Paragraph const & par = cur.paragraph();
1287         odocstringstream os;
1288
1289         if (buf.params().trackChanges)
1290                 os << _("[Change Tracking] ");
1291
1292         Change change = par.lookupChange(cur.pos());
1293
1294         if (change.type != Change::UNCHANGED) {
1295                 Author const & a = buf.params().authors().get(change.author);
1296                 os << _("Change: ") << a.name();
1297                 if (!a.email().empty())
1298                         os << " (" << a.email() << ")";
1299                 // FIXME ctime is english, we should translate that
1300                 os << _(" at ") << ctime(&change.changetime);
1301                 os << " : ";
1302         }
1303
1304         // I think we should only show changes from the default
1305         // font. (Asger)
1306         // No, from the document font (MV)
1307         Font font = real_current_font;
1308         font.reduce(buf.params().getFont());
1309
1310         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1311
1312         // The paragraph depth
1313         int depth = cur.paragraph().getDepth();
1314         if (depth > 0)
1315                 os << bformat(_(", Depth: %1$d"), depth);
1316
1317         // The paragraph spacing, but only if different from
1318         // buffer spacing.
1319         Spacing const & spacing = par.params().spacing();
1320         if (!spacing.isDefault()) {
1321                 os << _(", Spacing: ");
1322                 switch (spacing.getSpace()) {
1323                 case Spacing::Single:
1324                         os << _("Single");
1325                         break;
1326                 case Spacing::Onehalf:
1327                         os << _("OneHalf");
1328                         break;
1329                 case Spacing::Double:
1330                         os << _("Double");
1331                         break;
1332                 case Spacing::Other:
1333                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1334                         break;
1335                 case Spacing::Default:
1336                         // should never happen, do nothing
1337                         break;
1338                 }
1339         }
1340
1341 #ifdef DEVEL_VERSION
1342         os << _(", Inset: ") << &cur.inset();
1343         os << _(", Paragraph: ") << cur.pit();
1344         os << _(", Id: ") << par.id();
1345         os << _(", Position: ") << cur.pos();
1346         // FIXME: Why is the check for par.size() needed?
1347         // We are called with cur.pos() == par.size() quite often.
1348         if (!par.empty() && cur.pos() < par.size()) {
1349                 // Force output of code point, not character
1350                 size_t const c = par.getChar(cur.pos());
1351                 os << _(", Char: 0x") << std::hex << c;
1352         }
1353         os << _(", Boundary: ") << cur.boundary();
1354 //      Row & row = cur.textRow();
1355 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1356 #endif
1357         return os.str();
1358 }
1359
1360
1361 docstring Text::getPossibleLabel(Cursor & cur) const
1362 {
1363         pit_type pit = cur.pit();
1364
1365         LayoutPtr layout = pars_[pit].layout();
1366
1367         docstring text;
1368         docstring par_text = pars_[pit].asString(cur.buffer(), false);
1369         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1370                 if (par_text.empty())
1371                         break;
1372                 docstring head;
1373                 par_text = split(par_text, head, ' ');
1374                 // Is it legal to use spaces in labels ?
1375                 if (i > 0)
1376                         text += '-';
1377                 text += head;
1378         }
1379
1380         // No need for a prefix if the user said so.
1381         if (lyxrc.label_init_length <= 0)
1382                 return text;
1383
1384         // Will contain the label type.
1385         docstring name;
1386
1387         // For section, subsection, etc...
1388         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1389                 LayoutPtr const & layout2 = pars_[pit - 1].layout();
1390                 if (layout2->latextype != LATEX_PARAGRAPH) {
1391                         --pit;
1392                         layout = layout2;
1393                 }
1394         }
1395         if (layout->latextype != LATEX_PARAGRAPH)
1396                 name = from_ascii(layout->latexname());
1397
1398         // for captions, we just take the caption type
1399         Inset * caption_inset = cur.innerInsetOfType(Inset::CAPTION_CODE);
1400         if (caption_inset)
1401                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1402
1403         // If none of the above worked, we'll see if we're inside various
1404         // types of insets and take our abbreviation from them.
1405         if (name.empty()) {
1406                 Inset::Code const codes[] = {
1407                         Inset::FLOAT_CODE,
1408                         Inset::WRAP_CODE,
1409                         Inset::FOOT_CODE
1410                 };
1411                 for (unsigned int i = 0; i < (sizeof codes / sizeof codes[0]); ++i) {
1412                         Inset * float_inset = cur.innerInsetOfType(codes[i]);
1413                         if (float_inset) {
1414                                 name = float_inset->name();
1415                                 break;
1416                         }
1417                 }
1418         }
1419
1420         // Create a correct prefix for prettyref
1421         if (name == "theorem")
1422                 name = from_ascii("thm");
1423         else if (name == "Foot")
1424                 name = from_ascii("fn");
1425         else if (name == "listing")
1426                 name = from_ascii("lst");
1427
1428         if (!name.empty())
1429                 text = name.substr(0, 3) + ':' + text;
1430
1431         return text;
1432 }
1433
1434
1435 void Text::charsTranspose(Cursor & cur)
1436 {
1437         BOOST_ASSERT(this == cur.text());
1438
1439         pos_type pos = cur.pos();
1440
1441         // If cursor is at beginning or end of paragraph, do nothing.
1442         if (pos == cur.lastpos() || pos == 0)
1443                 return;
1444
1445         Paragraph & par = cur.paragraph();
1446
1447         // Get the positions of the characters to be transposed.
1448         pos_type pos1 = pos - 1;
1449         pos_type pos2 = pos;
1450
1451         // In change tracking mode, ignore deleted characters.
1452         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1453                 ++pos2;
1454         if (pos2 == cur.lastpos())
1455                 return;
1456
1457         while (pos1 >= 0 && par.isDeleted(pos1))
1458                 --pos1;
1459         if (pos1 < 0)
1460                 return;
1461
1462         // Don't do anything if one of the "characters" is not regular text.
1463         if (par.isInset(pos1) || par.isInset(pos2))
1464                 return;
1465
1466         // Store the characters to be transposed (including font information).
1467         char_type char1 = par.getChar(pos1);
1468         Font const font1 =
1469                 par.getFontSettings(cur.buffer().params(), pos1);
1470
1471         char_type char2 = par.getChar(pos2);
1472         Font const font2 =
1473                 par.getFontSettings(cur.buffer().params(), pos2);
1474
1475         // And finally, we are ready to perform the transposition.
1476         // Track the changes if Change Tracking is enabled.
1477         bool const trackChanges = cur.buffer().params().trackChanges;
1478
1479         recordUndo(cur);
1480
1481         par.eraseChar(pos2, trackChanges);
1482         par.eraseChar(pos1, trackChanges);
1483         par.insertChar(pos1, char2, font2, trackChanges);
1484         par.insertChar(pos2, char1, font1, trackChanges);
1485
1486         checkBufferStructure(cur.buffer(), cur);
1487
1488         // After the transposition, move cursor to after the transposition.
1489         setCursor(cur, cur.pit(), pos2);
1490         cur.forwardPos();
1491 }
1492
1493
1494 } // namespace lyx