src/Text.cpp

   1 /**
   2  * \file src/Text.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author Lars Gullik Bjønnes
   8  * \author Dov Feldstern
   9  * \author Jean-Marc Lasgouttes
  10  * \author John Levon
  11  * \author André Pönitz
  12  * \author Stefan Schimanski
  13  * \author Dekel Tsur
  14  * \author Jürgen Vigna
  15  *
  16  * Full author contact details are available in file CREDITS.
  17  */
  18
  19 #include <config.h>
  20
  21 #include "Text.h"
  22
  23 #include "Author.h"
  24 #include "Buffer.h"
  25 #include "buffer_funcs.h"
  26 #include "BufferParams.h"
  27 #include "BufferView.h"
  28 #include "Changes.h"
  29 #include "Cursor.h"
  30 #include "ParIterator.h"
  31 #include "CutAndPaste.h"
  32 #include "DispatchResult.h"
  33 #include "Encoding.h"
  34 #include "ErrorList.h"
  35 #include "FuncRequest.h"
  36 #include "factory.h"
  37 #include "FontIterator.h"
  38 #include "Language.h"
  39 #include "Length.h"
  40 #include "Lexer.h"
  41 #include "LyXRC.h"
  42 #include "Paragraph.h"
  43 #include "paragraph_funcs.h"
  44 #include "ParagraphParameters.h"
  45 #include "TextClass.h"
  46 #include "TextMetrics.h"
  47 #include "VSpace.h"
  48 #include "WordLangTuple.h"
  49
  50 #include "frontends/FontMetrics.h"
  51 #include "frontends/Painter.h"
  52
  53 #include "insets/InsetText.h"
  54 #include "insets/InsetBibitem.h"
  55 #include "insets/InsetCaption.h"
  56 #include "insets/InsetHFill.h"
  57 #include "insets/InsetLine.h"
  58 #include "insets/InsetNewline.h"
  59 #include "insets/InsetNewpage.h"
  60 #include "insets/InsetOptArg.h"
  61 #include "insets/InsetSpace.h"
  62 #include "insets/InsetSpecialChar.h"
  63 #include "insets/InsetTabular.h"
  64
  65 #include "support/convert.h"
  66 #include "support/debug.h"
  67 #include "support/docstream.h"
  68 #include "support/gettext.h"
  69 #include "support/lstrings.h"
  70 #include "support/textutils.h"
  71
  72 #include <boost/next_prior.hpp>
  73
  74 #include <sstream>
  75
  76 using namespace std;
  77 using namespace lyx::support;
  78
  79 namespace lyx {
  80
  81 using cap::cutSelection;
  82 using cap::pasteParagraphList;
  83
  84 using frontend::FontMetrics;
  85
  86 namespace {
  87
  88 void readParToken(Buffer const & buf, Paragraph & par, Lexer & lex,
  89         string const & token, Font & font, Change & change, ErrorList & errorList)
  90 {
  91         BufferParams const & bp = buf.params();
  92
  93         if (token[0] != '\\') {
  94                 docstring dstr = lex.getDocString();
  95                 par.appendString(dstr, font, change);
  96
  97         } else if (token == "\\begin_layout") {
  98                 lex.eatLine();
  99                 docstring layoutname = lex.getDocString();
 100
 101                 font = Font(inherit_font, bp.language);
 102                 change = Change(Change::UNCHANGED);
 103
 104                 TextClass const & tclass = bp.getTextClass();
 105
 106                 if (layoutname.empty())
 107                         layoutname = tclass.defaultLayoutName();
 108
 109                 if (par.forceEmptyLayout())
 110                         // in this case only the empty layout is allowed
 111                         layoutname = tclass.emptyLayoutName();
 112                 else if (par.useEmptyLayout()) {
 113                         // in this case, default layout maps to empty layout
 114                         if (layoutname == tclass.defaultLayoutName())
 115                                 layoutname = tclass.emptyLayoutName();
 116                 } else {
 117                         // otherwise, the empty layout maps to the default
 118                         if (layoutname == tclass.emptyLayoutName())
 119                                 layoutname = tclass.defaultLayoutName();
 120                 }
 121
 122                 bool hasLayout = tclass.hasLayout(layoutname);
 123
 124                 if (!hasLayout) {
 125                         errorList.push_back(ErrorItem(_("Unknown layout"),
 126                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 127                         layoutname, from_utf8(tclass.name())), par.id(), 0, par.size()));
 128                         layoutname = par.useEmptyLayout() ?
 129                                         tclass.emptyLayoutName() :
 130                                         tclass.defaultLayoutName();
 131                 }
 132
 133                 par.layout(bp.getTextClass()[layoutname]);
 134
 135                 // Test whether the layout is obsolete.
 136                 LayoutPtr const & layout = par.layout();
 137                 if (!layout->obsoleted_by().empty())
 138                         par.layout(bp.getTextClass()[layout->obsoleted_by()]);
 139
 140                 par.params().read(lex);
 141
 142         } else if (token == "\\end_layout") {
 143                 LYXERR0("Solitary \\end_layout in line " << lex.getLineNo() << "\n"
 144                        << "Missing \\begin_layout ?");
 145         } else if (token == "\\end_inset") {
 146                 LYXERR0("Solitary \\end_inset in line " << lex.getLineNo() << "\n"
 147                        << "Missing \\begin_inset ?");
 148         } else if (token == "\\begin_inset") {
 149                 Inset * inset = readInset(lex, buf);
 150                 if (inset)
 151                         par.insertInset(par.size(), inset, font, change);
 152                 else {
 153                         lex.eatLine();
 154                         docstring line = lex.getDocString();
 155                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 156                                             par.id(), 0, par.size()));
 157                 }
 158         } else if (token == "\\family") {
 159                 lex.next();
 160                 setLyXFamily(lex.getString(), font.fontInfo());
 161         } else if (token == "\\series") {
 162                 lex.next();
 163                 setLyXSeries(lex.getString(), font.fontInfo());
 164         } else if (token == "\\shape") {
 165                 lex.next();
 166                 setLyXShape(lex.getString(), font.fontInfo());
 167         } else if (token == "\\size") {
 168                 lex.next();
 169                 setLyXSize(lex.getString(), font.fontInfo());
 170         } else if (token == "\\lang") {
 171                 lex.next();
 172                 string const tok = lex.getString();
 173                 Language const * lang = languages.getLanguage(tok);
 174                 if (lang) {
 175                         font.setLanguage(lang);
 176                 } else {
 177                         font.setLanguage(bp.language);
 178                         lex.printError("Unknown language `$$Token'");
 179                 }
 180         } else if (token == "\\numeric") {
 181                 lex.next();
 182                 font.fontInfo().setNumber(font.setLyXMisc(lex.getString()));
 183         } else if (token == "\\emph") {
 184                 lex.next();
 185                 font.fontInfo().setEmph(font.setLyXMisc(lex.getString()));
 186         } else if (token == "\\bar") {
 187                 lex.next();
 188                 string const tok = lex.getString();
 189
 190                 if (tok == "under")
 191                         font.fontInfo().setUnderbar(FONT_ON);
 192                 else if (tok == "no")
 193                         font.fontInfo().setUnderbar(FONT_OFF);
 194                 else if (tok == "default")
 195                         font.fontInfo().setUnderbar(FONT_INHERIT);
 196                 else
 197                         lex.printError("Unknown bar font flag "
 198                                        "`$$Token'");
 199         } else if (token == "\\noun") {
 200                 lex.next();
 201                 font.fontInfo().setNoun(font.setLyXMisc(lex.getString()));
 202         } else if (token == "\\color") {
 203                 lex.next();
 204                 setLyXColor(lex.getString(), font.fontInfo());
 205         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 206
 207                 // Insets don't make sense in a free-spacing context! ---Kayvan
 208                 if (par.isFreeSpacing()) {
 209                         if (token == "\\InsetSpace")
 210                                 par.appendChar(' ', font, change);
 211                         else if (lex.isOK()) {
 212                                 lex.next();
 213                                 string const next_token = lex.getString();
 214                                 if (next_token == "\\-")
 215                                         par.appendChar('-', font, change);
 216                                 else {
 217                                         lex.printError("Token `$$Token' "
 218                                                        "is in free space "
 219                                                        "paragraph layout!");
 220                                 }
 221                         }
 222                 } else {
 223                         auto_ptr<Inset> inset;
 224                         if (token == "\\SpecialChar" )
 225                                 inset.reset(new InsetSpecialChar);
 226                         else
 227                                 inset.reset(new InsetSpace);
 228                         inset->read(buf, lex);
 229                         par.insertInset(par.size(), inset.release(),
 230                                         font, change);
 231                 }
 232         } else if (token == "\\backslash") {
 233                 par.appendChar('\\', font, change);
 234         } else if (token == "\\linebreak") {
 235                 auto_ptr<Inset> inset(new InsetLinebreak);
 236                 inset->read(buf, lex);
 237                 par.insertInset(par.size(), inset.release(), font, change);
 238         } else if (token == "\\newline") {
 239                 auto_ptr<Inset> inset(new InsetNewline);
 240                 inset->read(buf, lex);
 241                 par.insertInset(par.size(), inset.release(), font, change);
 242         } else if (token == "\\LyXTable") {
 243                 auto_ptr<Inset> inset(new InsetTabular(buf));
 244                 inset->read(buf, lex);
 245                 par.insertInset(par.size(), inset.release(), font, change);
 246         } else if (token == "\\hfill") {
 247                 par.insertInset(par.size(), new InsetHFill, font, change);
 248         } else if (token == "\\lyxline") {
 249                 par.insertInset(par.size(), new InsetLine, font, change);
 250         } else if (token == "\\newpage") {
 251                 par.insertInset(par.size(), new InsetNewpage, font, change);
 252         } else if (token == "\\pagebreak") {
 253                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 254         } else if (token == "\\clearpage") {
 255                 par.insertInset(par.size(), new InsetClearPage, font, change);
 256         } else if (token == "\\cleardoublepage") {
 257                 par.insertInset(par.size(), new InsetClearDoublePage, font, change);
 258         } else if (token == "\\change_unchanged") {
 259                 change = Change(Change::UNCHANGED);
 260         } else if (token == "\\change_inserted") {
 261                 lex.eatLine();
 262                 istringstream is(lex.getString());
 263                 unsigned int aid;
 264                 time_t ct;
 265                 is >> aid >> ct;
 266                 if (aid >= bp.author_map.size()) {
 267                         errorList.push_back(ErrorItem(_("Change tracking error"),
 268                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 269                                             par.id(), 0, par.size()));
 270                         change = Change(Change::UNCHANGED);
 271                 } else
 272                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 273         } else if (token == "\\change_deleted") {
 274                 lex.eatLine();
 275                 istringstream is(lex.getString());
 276                 unsigned int aid;
 277                 time_t ct;
 278                 is >> aid >> ct;
 279                 if (aid >= bp.author_map.size()) {
 280                         errorList.push_back(ErrorItem(_("Change tracking error"),
 281                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 282                                             par.id(), 0, par.size()));
 283                         change = Change(Change::UNCHANGED);
 284                 } else
 285                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 286         } else {
 287                 lex.eatLine();
 288                 errorList.push_back(ErrorItem(_("Unknown token"),
 289                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 290                         lex.getDocString()),
 291                         par.id(), 0, par.size()));
 292         }
 293 }
 294
 295
 296 void readParagraph(Buffer const & buf, Paragraph & par, Lexer & lex,
 297         ErrorList & errorList)
 298 {
 299         lex.nextToken();
 300         string token = lex.getString();
 301         Font font;
 302         Change change(Change::UNCHANGED);
 303
 304         while (lex.isOK()) {
 305                 readParToken(buf, par, lex, token, font, change, errorList);
 306
 307                 lex.nextToken();
 308                 token = lex.getString();
 309
 310                 if (token.empty())
 311                         continue;
 312
 313                 if (token == "\\end_layout") {
 314                         //Ok, paragraph finished
 315                         break;
 316                 }
 317
 318                 LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
 319                 if (token == "\\begin_layout" || token == "\\end_document"
 320                     || token == "\\end_inset" || token == "\\begin_deeper"
 321                     || token == "\\end_deeper") {
 322                         lex.pushToken(token);
 323                         lyxerr << "Paragraph ended in line "
 324                                << lex.getLineNo() << "\n"
 325                                << "Missing \\end_layout.\n";
 326                         break;
 327                 }
 328         }
 329         // Final change goes to paragraph break:
 330         par.setChange(par.size(), change);
 331
 332         // Initialize begin_of_body_ on load; redoParagraph maintains
 333         par.setBeginOfBody();
 334 }
 335
 336
 337 } // namespace anon
 338
 339
 340 bool Text::empty() const
 341 {
 342         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 343                 // FIXME: Should we consider the labeled type as empty too?
 344                 && pars_[0].layout()->labeltype == LABEL_NO_LABEL);
 345 }
 346
 347
 348 double Text::spacing(Buffer const & buffer,
 349                 Paragraph const & par) const
 350 {
 351         if (par.params().spacing().isDefault())
 352                 return buffer.params().spacing().getValue();
 353         return par.params().spacing().getValue();
 354 }
 355
 356
 357 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 358 {
 359         BOOST_ASSERT(this == cur.text());
 360
 361         Paragraph & cpar = cur.paragraph();
 362         pit_type cpit = cur.pit();
 363
 364         TextClass const & tclass = cur.buffer().params().getTextClass();
 365         LayoutPtr const & layout = cpar.layout();
 366
 367         // this is only allowed, if the current paragraph is not empty
 368         // or caption and if it has not the keepempty flag active
 369         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 370             layout->labeltype != LABEL_SENSITIVE)
 371                 return;
 372
 373         // a layout change may affect also the following paragraph
 374         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 375
 376         // Always break behind a space
 377         // It is better to erase the space (Dekel)
 378         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 379                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
 380
 381         // What should the layout for the new paragraph be?
 382         bool keep_layout = inverse_logic ?
 383                 !layout->isEnvironment()
 384                 : layout->isEnvironment();
 385
 386         // We need to remember this before we break the paragraph, because
 387         // that invalidates the layout variable
 388         bool sensitive = layout->labeltype == LABEL_SENSITIVE;
 389
 390         // we need to set this before we insert the paragraph.
 391         bool const isempty = cpar.allowEmpty() && cpar.empty();
 392
 393         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
 394                          cur.pos(), keep_layout);
 395
 396         // After this, neither paragraph contains any rows!
 397
 398         cpit = cur.pit();
 399         pit_type next_par = cpit + 1;
 400
 401         // well this is the caption hack since one caption is really enough
 402         if (sensitive) {
 403                 if (cur.pos() == 0)
 404                         // set to standard-layout
 405                 //FIXME Check if this should be emptyLayout() in some cases
 406                         pars_[cpit].applyLayout(tclass.defaultLayout());
 407                 else
 408                         // set to standard-layout
 409                         //FIXME Check if this should be emptyLayout() in some cases
 410                         pars_[next_par].applyLayout(tclass.defaultLayout());
 411         }
 412
 413         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 414                 if (!pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges))
 415                         break; // the character couldn't be deleted physically due to change tracking
 416         }
 417
 418         updateLabels(cur.buffer());
 419
 420         // A singlePar update is not enough in this case.
 421         cur.updateFlags(Update::Force);
 422
 423         // This check is necessary. Otherwise the new empty paragraph will
 424         // be deleted automatically. And it is more friendly for the user!
 425         if (cur.pos() != 0 || isempty)
 426                 setCursor(cur, cur.pit() + 1, 0);
 427         else
 428                 setCursor(cur, cur.pit(), 0);
 429 }
 430
 431
 432 // insert a character, moves all the following breaks in the
 433 // same Paragraph one to the right and make a rebreak
 434 void Text::insertChar(Cursor & cur, char_type c)
 435 {
 436         BOOST_ASSERT(this == cur.text());
 437
 438         cur.recordUndo(INSERT_UNDO);
 439
 440         TextMetrics const & tm = cur.bv().textMetrics(this);
 441         Buffer const & buffer = cur.buffer();
 442         Paragraph & par = cur.paragraph();
 443         // try to remove this
 444         pit_type const pit = cur.pit();
 445
 446         bool const freeSpacing = par.layout()->free_spacing ||
 447                 par.isFreeSpacing();
 448
 449         if (lyxrc.auto_number) {
 450                 static docstring const number_operators = from_ascii("+-/*");
 451                 static docstring const number_unary_operators = from_ascii("+-");
 452                 static docstring const number_seperators = from_ascii(".,:");
 453
 454                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 455                         if (!isDigit(c) && !contains(number_operators, c) &&
 456                             !(contains(number_seperators, c) &&
 457                               cur.pos() != 0 &&
 458                               cur.pos() != cur.lastpos() &&
 459                               tm.getDisplayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 460                               tm.getDisplayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 461                            )
 462                                 number(cur); // Set current_font.number to OFF
 463                 } else if (isDigit(c) &&
 464                            cur.real_current_font.isVisibleRightToLeft()) {
 465                         number(cur); // Set current_font.number to ON
 466
 467                         if (cur.pos() != 0) {
 468                                 char_type const c = par.getChar(cur.pos() - 1);
 469                                 if (contains(number_unary_operators, c) &&
 470                                     (cur.pos() == 1
 471                                      || par.isSeparator(cur.pos() - 2)
 472                                      || par.isNewline(cur.pos() - 2))
 473                                   ) {
 474                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 475                                                 tm.font_);
 476                                 } else if (contains(number_seperators, c)
 477                                      && cur.pos() >= 2
 478                                      && tm.getDisplayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 479                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 480                                                 tm.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  = tm.getDisplayFont(cur.pit(), 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.isRTL(buffer.params())) ?
 522                                 pre_space_font.language() : post_space_font.language();
 523
 524                         Font space_font = tm.getDisplayFont(cur.pit(), 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         cur.checkBufferStructure();
 563
 564 //              cur.updateFlags(Update::Force);
 565         setCursor(cur.top(), cur.pit(), cur.pos() + 1);
 566         charInserted(cur);
 567 }
 568
 569
 570 void Text::charInserted(Cursor & cur)
 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                 cur.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::cursorForwardOneWord(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::cursorBackwardOneWord(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         cur.recordUndoSelection();
 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         cur.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                 cursorForward(cur);
 808         else {
 809                 cur.resetAnchor();
 810                 cur.selection() = true;
 811                 cursorForwardOneWord(cur);
 812                 cur.setSelection();
 813                 cutSelection(cur, true, false);
 814                 cur.checkBufferStructure();
 815         }
 816 }
 817
 818
 819 void Text::deleteWordBackward(Cursor & cur)
 820 {
 821         BOOST_ASSERT(this == cur.text());
 822         if (cur.lastpos() == 0)
 823                 cursorBackward(cur);
 824         else {
 825                 cur.resetAnchor();
 826                 cur.selection() = true;
 827                 cursorBackwardOneWord(cur);
 828                 cur.setSelection();
 829                 cutSelection(cur, true, false);
 830                 cur.checkBufferStructure();
 831         }
 832 }
 833
 834
 835 // Kill to end of line.
 836 void Text::changeCase(Cursor & cur, TextCase action)
 837 {
 838         BOOST_ASSERT(this == cur.text());
 839         CursorSlice from;
 840         CursorSlice to;
 841
 842         bool gotsel = false;
 843         if (cur.selection()) {
 844                 from = cur.selBegin();
 845                 to = cur.selEnd();
 846                 gotsel = true;
 847         } else {
 848                 from = cur.top();
 849                 getWord(from, to, PARTIAL_WORD);
 850                 cursorForwardOneWord(cur);
 851         }
 852
 853         cur.recordUndoSelection();
 854
 855         pit_type begPit = from.pit();
 856         pit_type endPit = to.pit();
 857
 858         pos_type begPos = from.pos();
 859         pos_type endPos = to.pos();
 860
 861         pos_type right = 0; // needed after the for loop
 862
 863         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 864                 Paragraph & par = pars_[pit];
 865                 pos_type const pos = (pit == begPit ? begPos : 0);
 866                 right = (pit == endPit ? endPos : par.size());
 867                 par.changeCase(cur.buffer().params(), pos, right, action);
 868         }
 869
 870         // the selection may have changed due to logically-only deleted chars
 871         if (gotsel) {
 872                 setCursor(cur, begPit, begPos);
 873                 cur.resetAnchor();
 874                 setCursor(cur, endPit, right);
 875                 cur.setSelection();
 876         } else
 877                 setCursor(cur, endPit, right);
 878
 879         cur.checkBufferStructure();
 880 }
 881
 882
 883 bool Text::handleBibitems(Cursor & cur)
 884 {
 885         if (cur.paragraph().layout()->labeltype != LABEL_BIBLIO)
 886                 return false;
 887
 888         if (cur.pos() != 0)
 889                 return false;
 890
 891         BufferParams const & bufparams = cur.buffer().params();
 892         Paragraph const & par = cur.paragraph();
 893         Cursor prevcur = cur;
 894         if (cur.pit() > 0) {
 895                 --prevcur.pit();
 896                 prevcur.pos() = prevcur.lastpos();
 897         }
 898         Paragraph const & prevpar = prevcur.paragraph();
 899
 900         // if a bibitem is deleted, merge with previous paragraph
 901         // if this is a bibliography item as well
 902         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
 903                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
 904                 mergeParagraph(bufparams, cur.text()->paragraphs(),
 905                                                         prevcur.pit());
 906                 updateLabels(cur.buffer());
 907                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
 908                 cur.updateFlags(Update::Force);
 909                 return true;
 910         }
 911
 912         // otherwise reset to default
 913         if (par.useEmptyLayout())
 914                 cur.paragraph().layout(bufparams.getTextClass().emptyLayout());
 915         else
 916                 cur.paragraph().layout(bufparams.getTextClass().defaultLayout());
 917         return true;
 918 }
 919
 920
 921 bool Text::erase(Cursor & cur)
 922 {
 923         BOOST_ASSERT(this == cur.text());
 924         bool needsUpdate = false;
 925         Paragraph & par = cur.paragraph();
 926
 927         if (cur.pos() != cur.lastpos()) {
 928                 // this is the code for a normal delete, not pasting
 929                 // any paragraphs
 930                 cur.recordUndo(DELETE_UNDO);
 931                 bool const was_inset = cur.paragraph().isInset(cur.pos());
 932                 if(!par.eraseChar(cur.pos(), cur.buffer().params().trackChanges))
 933                         // the character has been logically deleted only => skip it
 934                         cur.top().forwardPos();
 935
 936                 if (was_inset)
 937                         updateLabels(cur.buffer());
 938                 else
 939                         cur.checkBufferStructure();
 940                 needsUpdate = true;
 941         } else {
 942                 if (cur.pit() == cur.lastpit())
 943                         return dissolveInset(cur);
 944
 945                 if (!par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
 946                         par.setChange(cur.pos(), Change(Change::DELETED));
 947                         cur.forwardPos();
 948                         needsUpdate = true;
 949                 } else {
 950                         setCursorIntern(cur, cur.pit() + 1, 0);
 951                         needsUpdate = backspacePos0(cur);
 952                 }
 953         }
 954
 955         needsUpdate |= handleBibitems(cur);
 956
 957         if (needsUpdate) {
 958                 // Make sure the cursor is correct. Is this really needed?
 959                 // No, not really... at least not here!
 960                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
 961                 cur.checkBufferStructure();
 962         }
 963
 964         return needsUpdate;
 965 }
 966
 967
 968 bool Text::backspacePos0(Cursor & cur)
 969 {
 970         BOOST_ASSERT(this == cur.text());
 971         if (cur.pit() == 0)
 972                 return false;
 973
 974         bool needsUpdate = false;
 975
 976         BufferParams const & bufparams = cur.buffer().params();
 977         TextClass const & tclass = bufparams.getTextClass();
 978         ParagraphList & plist = cur.text()->paragraphs();
 979         Paragraph const & par = cur.paragraph();
 980         Cursor prevcur = cur;
 981         --prevcur.pit();
 982         prevcur.pos() = prevcur.lastpos();
 983         Paragraph const & prevpar = prevcur.paragraph();
 984
 985         // is it an empty paragraph?
 986         if (cur.lastpos() == 0
 987             || (cur.lastpos() == 1 && par.isSeparator(0))) {
 988                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
 989                 plist.erase(boost::next(plist.begin(), cur.pit()));
 990                 needsUpdate = true;
 991         }
 992         // is previous par empty?
 993         else if (prevcur.lastpos() == 0
 994                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
 995                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
 996                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
 997                 needsUpdate = true;
 998         }
 999         // Pasting is not allowed, if the paragraphs have different
1000         // layouts. I think it is a real bug of all other
1001         // word processors to allow it. It confuses the user.
1002         // Correction: Pasting is always allowed with standard-layout
1003         // or the empty layout.
1004         else if (par.layout() == prevpar.layout()
1005                  || par.layout() == tclass.defaultLayout()
1006                  || par.layout() == tclass.emptyLayout()) {
1007                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1008                 mergeParagraph(bufparams, plist, prevcur.pit());
1009                 needsUpdate = true;
1010         }
1011
1012         if (needsUpdate) {
1013                 updateLabels(cur.buffer());
1014                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1015         }
1016
1017         return needsUpdate;
1018 }
1019
1020
1021 bool Text::backspace(Cursor & cur)
1022 {
1023         BOOST_ASSERT(this == cur.text());
1024         bool needsUpdate = false;
1025         if (cur.pos() == 0) {
1026                 if (cur.pit() == 0)
1027                         return dissolveInset(cur);
1028
1029                 Paragraph & prev_par = pars_[cur.pit() - 1];
1030
1031                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1032                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1033                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1034                         return true;
1035                 }
1036                 // The cursor is at the beginning of a paragraph, so
1037                 // the backspace will collapse two paragraphs into one.
1038                 needsUpdate = backspacePos0(cur);
1039
1040         } else {
1041                 // this is the code for a normal backspace, not pasting
1042                 // any paragraphs
1043                 cur.recordUndo(DELETE_UNDO);
1044                 // We used to do cursorBackwardIntern() here, but it is
1045                 // not a good idea since it triggers the auto-delete
1046                 // mechanism. So we do a cursorBackwardIntern()-lite,
1047                 // without the dreaded mechanism. (JMarc)
1048                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1049                                 false, cur.boundary());
1050                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1051                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1052                 if (was_inset)
1053                         updateLabels(cur.buffer());
1054                 else
1055                         cur.checkBufferStructure();
1056         }
1057
1058         if (cur.pos() == cur.lastpos())
1059                 cur.setCurrentFont();
1060
1061         needsUpdate |= handleBibitems(cur);
1062
1063         // A singlePar update is not enough in this case.
1064 //              cur.updateFlags(Update::Force);
1065         setCursor(cur.top(), cur.pit(), cur.pos());
1066
1067         return needsUpdate;
1068 }
1069
1070
1071 bool Text::dissolveInset(Cursor & cur) {
1072         BOOST_ASSERT(this == cur.text());
1073
1074         if (isMainText(cur.bv().buffer()) || cur.inset().nargs() != 1)
1075                 return false;
1076
1077         cur.recordUndoInset();
1078         cur.mark() = false;
1079         cur.selHandle(false);
1080         // save position
1081         pos_type spos = cur.pos();
1082         pit_type spit = cur.pit();
1083         ParagraphList plist;
1084         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1085                 plist = paragraphs();
1086         cur.popBackward();
1087         // store cursor offset
1088         if (spit == 0)
1089                 spos += cur.pos();
1090         spit += cur.pit();
1091         Buffer & b = cur.buffer();
1092         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1093         if (!plist.empty()) {
1094                 // ERT paragraphs have the Language latex_language.
1095                 // This is invalid outside of ERT, so we need to
1096                 // change it to the buffer language.
1097                 ParagraphList::iterator it = plist.begin();
1098                 ParagraphList::iterator it_end = plist.end();
1099                 for (; it != it_end; it++)
1100                         it->changeLanguage(b.params(), latex_language, b.language());
1101
1102                 pasteParagraphList(cur, plist, b.params().getTextClassPtr(),
1103                                    b.errorList("Paste"));
1104                 // restore position
1105                 cur.pit() = min(cur.lastpit(), spit);
1106                 cur.pos() = min(cur.lastpos(), spos);
1107         }
1108         cur.clearSelection();
1109         cur.resetAnchor();
1110         return true;
1111 }
1112
1113
1114 void Text::getWord(CursorSlice & from, CursorSlice & to,
1115         word_location const loc)
1116 {
1117         Paragraph const & from_par = pars_[from.pit()];
1118         switch (loc) {
1119         case WHOLE_WORD_STRICT:
1120                 if (from.pos() == 0 || from.pos() == from_par.size()
1121                     || !from_par.isLetter(from.pos())
1122                     || !from_par.isLetter(from.pos() - 1)) {
1123                         to = from;
1124                         return;
1125                 }
1126                 // no break here, we go to the next
1127
1128         case WHOLE_WORD:
1129                 // If we are already at the beginning of a word, do nothing
1130                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1131                         break;
1132                 // no break here, we go to the next
1133
1134         case PREVIOUS_WORD:
1135                 // always move the cursor to the beginning of previous word
1136                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1137                         --from.pos();
1138                 break;
1139         case NEXT_WORD:
1140                 LYXERR0("Text::getWord: NEXT_WORD not implemented yet");
1141                 break;
1142         case PARTIAL_WORD:
1143                 // no need to move the 'from' cursor
1144                 break;
1145         }
1146         to = from;
1147         Paragraph & to_par = pars_[to.pit()];
1148         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1149                 ++to.pos();
1150 }
1151
1152
1153 void Text::write(Buffer const & buf, ostream & os) const
1154 {
1155         ParagraphList::const_iterator pit = paragraphs().begin();
1156         ParagraphList::const_iterator end = paragraphs().end();
1157         depth_type dth = 0;
1158         for (; pit != end; ++pit)
1159                 pit->write(buf, os, buf.params(), dth);
1160
1161         // Close begin_deeper
1162         for(; dth > 0; --dth)
1163                 os << "\n\\end_deeper";
1164 }
1165
1166
1167 bool Text::read(Buffer const & buf, Lexer & lex, ErrorList & errorList)
1168 {
1169         depth_type depth = 0;
1170
1171         while (lex.isOK()) {
1172                 lex.nextToken();
1173                 string const token = lex.getString();
1174
1175                 if (token.empty())
1176                         continue;
1177
1178                 if (token == "\\end_inset")
1179                         break;
1180
1181                 if (token == "\\end_body")
1182                         continue;
1183
1184                 if (token == "\\begin_body")
1185                         continue;
1186
1187                 if (token == "\\end_document")
1188                         return false;
1189
1190                 if (token == "\\begin_layout") {
1191                         lex.pushToken(token);
1192
1193                         Paragraph par;
1194                         par.params().depth(depth);
1195                         par.setFont(0, Font(inherit_font, buf.params().language));
1196                         pars_.push_back(par);
1197
1198                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1199                         // not BufferParams
1200                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
1201
1202                 } else if (token == "\\begin_deeper") {
1203                         ++depth;
1204                 } else if (token == "\\end_deeper") {
1205                         if (!depth)
1206                                 lex.printError("\\end_deeper: " "depth is already null");
1207                         else
1208                                 --depth;
1209                 } else {
1210                         LYXERR0("Handling unknown body token: `" << token << '\'');
1211                 }
1212         }
1213         return true;
1214 }
1215
1216 // Returns the current font and depth as a message.
1217 docstring Text::currentState(Cursor & cur)
1218 {
1219         BOOST_ASSERT(this == cur.text());
1220         Buffer & buf = cur.buffer();
1221         Paragraph const & par = cur.paragraph();
1222         odocstringstream os;
1223
1224         if (buf.params().trackChanges)
1225                 os << _("[Change Tracking] ");
1226
1227         Change change = par.lookupChange(cur.pos());
1228
1229         if (change.type != Change::UNCHANGED) {
1230                 Author const & a = buf.params().authors().get(change.author);
1231                 os << _("Change: ") << a.name();
1232                 if (!a.email().empty())
1233                         os << " (" << a.email() << ")";
1234                 // FIXME ctime is english, we should translate that
1235                 os << _(" at ") << ctime(&change.changetime);
1236                 os << " : ";
1237         }
1238
1239         // I think we should only show changes from the default
1240         // font. (Asger)
1241         // No, from the document font (MV)
1242         Font font = cur.real_current_font;
1243         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1244
1245         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1246
1247         // The paragraph depth
1248         int depth = cur.paragraph().getDepth();
1249         if (depth > 0)
1250                 os << bformat(_(", Depth: %1$d"), depth);
1251
1252         // The paragraph spacing, but only if different from
1253         // buffer spacing.
1254         Spacing const & spacing = par.params().spacing();
1255         if (!spacing.isDefault()) {
1256                 os << _(", Spacing: ");
1257                 switch (spacing.getSpace()) {
1258                 case Spacing::Single:
1259                         os << _("Single");
1260                         break;
1261                 case Spacing::Onehalf:
1262                         os << _("OneHalf");
1263                         break;
1264                 case Spacing::Double:
1265                         os << _("Double");
1266                         break;
1267                 case Spacing::Other:
1268                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1269                         break;
1270                 case Spacing::Default:
1271                         // should never happen, do nothing
1272                         break;
1273                 }
1274         }
1275
1276 #ifdef DEVEL_VERSION
1277         os << _(", Inset: ") << &cur.inset();
1278         os << _(", Paragraph: ") << cur.pit();
1279         os << _(", Id: ") << par.id();
1280         os << _(", Position: ") << cur.pos();
1281         // FIXME: Why is the check for par.size() needed?
1282         // We are called with cur.pos() == par.size() quite often.
1283         if (!par.empty() && cur.pos() < par.size()) {
1284                 // Force output of code point, not character
1285                 size_t const c = par.getChar(cur.pos());
1286                 os << _(", Char: 0x") << hex << c;
1287         }
1288         os << _(", Boundary: ") << cur.boundary();
1289 //      Row & row = cur.textRow();
1290 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1291 #endif
1292         return os.str();
1293 }
1294
1295
1296 docstring Text::getPossibleLabel(Cursor & cur) const
1297 {
1298         pit_type pit = cur.pit();
1299
1300         LayoutPtr layout = pars_[pit].layout();
1301
1302         docstring text;
1303         docstring par_text = pars_[pit].asString(cur.buffer(), false);
1304         string piece;
1305         // the return string of math matrices might contain linebreaks
1306         par_text = subst(par_text, '\n', '-');
1307         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1308                 if (par_text.empty())
1309                         break;
1310                 docstring head;
1311                 par_text = split(par_text, head, ' ');
1312                 // Is it legal to use spaces in labels ?
1313                 if (i > 0)
1314                         text += '-';
1315                 text += head;
1316         }
1317
1318         // No need for a prefix if the user said so.
1319         if (lyxrc.label_init_length <= 0)
1320                 return text;
1321
1322         // Will contain the label type.
1323         docstring name;
1324
1325         // For section, subsection, etc...
1326         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1327                 LayoutPtr const & layout2 = pars_[pit - 1].layout();
1328                 if (layout2->latextype != LATEX_PARAGRAPH) {
1329                         --pit;
1330                         layout = layout2;
1331                 }
1332         }
1333         if (layout->latextype != LATEX_PARAGRAPH)
1334                 name = from_ascii(layout->latexname());
1335
1336         // for captions, we just take the caption type
1337         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
1338         if (caption_inset)
1339                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1340
1341         // If none of the above worked, we'll see if we're inside various
1342         // types of insets and take our abbreviation from them.
1343         if (name.empty()) {
1344                 InsetCode const codes[] = {
1345                         FLOAT_CODE,
1346                         WRAP_CODE,
1347                         FOOT_CODE
1348                 };
1349                 for (unsigned int i = 0; i < (sizeof codes / sizeof codes[0]); ++i) {
1350                         Inset * float_inset = cur.innerInsetOfType(codes[i]);
1351                         if (float_inset) {
1352                                 name = float_inset->name();
1353                                 break;
1354                         }
1355                 }
1356         }
1357
1358         // Create a correct prefix for prettyref
1359         if (name == "theorem")
1360                 name = from_ascii("thm");
1361         else if (name == "Foot")
1362                 name = from_ascii("fn");
1363         else if (name == "listing")
1364                 name = from_ascii("lst");
1365
1366         if (!name.empty())
1367                 text = name.substr(0, 3) + ':' + text;
1368
1369         return text;
1370 }
1371
1372
1373 void Text::charsTranspose(Cursor & cur)
1374 {
1375         BOOST_ASSERT(this == cur.text());
1376
1377         pos_type pos = cur.pos();
1378
1379         // If cursor is at beginning or end of paragraph, do nothing.
1380         if (pos == cur.lastpos() || pos == 0)
1381                 return;
1382
1383         Paragraph & par = cur.paragraph();
1384
1385         // Get the positions of the characters to be transposed.
1386         pos_type pos1 = pos - 1;
1387         pos_type pos2 = pos;
1388
1389         // In change tracking mode, ignore deleted characters.
1390         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1391                 ++pos2;
1392         if (pos2 == cur.lastpos())
1393                 return;
1394
1395         while (pos1 >= 0 && par.isDeleted(pos1))
1396                 --pos1;
1397         if (pos1 < 0)
1398                 return;
1399
1400         // Don't do anything if one of the "characters" is not regular text.
1401         if (par.isInset(pos1) || par.isInset(pos2))
1402                 return;
1403
1404         // Store the characters to be transposed (including font information).
1405         char_type char1 = par.getChar(pos1);
1406         Font const font1 =
1407                 par.getFontSettings(cur.buffer().params(), pos1);
1408
1409         char_type char2 = par.getChar(pos2);
1410         Font const font2 =
1411                 par.getFontSettings(cur.buffer().params(), pos2);
1412
1413         // And finally, we are ready to perform the transposition.
1414         // Track the changes if Change Tracking is enabled.
1415         bool const trackChanges = cur.buffer().params().trackChanges;
1416
1417         cur.recordUndo();
1418
1419         par.eraseChar(pos2, trackChanges);
1420         par.eraseChar(pos1, trackChanges);
1421         par.insertChar(pos1, char2, font2, trackChanges);
1422         par.insertChar(pos2, char1, font1, trackChanges);
1423
1424         cur.checkBufferStructure();
1425
1426         // After the transposition, move cursor to after the transposition.
1427         setCursor(cur, cur.pit(), pos2);
1428         cur.forwardPos();
1429 }
1430
1431
1432 DocIterator Text::macrocontextPosition() const
1433 {
1434         return macrocontext_position_;
1435 }
1436
1437
1438 void Text::setMacrocontextPosition(DocIterator const & pos)
1439 {
1440         macrocontext_position_ = pos;
1441 }
1442
1443
1444 } // namespace lyx