src/Text.cpp

   1 /**
   2  * \file src/Text.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author Lars Gullik Bjønnes
   8  * \author Dov Feldstern
   9  * \author Jean-Marc Lasgouttes
  10  * \author John Levon
  11  * \author André Pönitz
  12  * \author Stefan Schimanski
  13  * \author Dekel Tsur
  14  * \author Jürgen Vigna
  15  *
  16  * Full author contact details are available in file CREDITS.
  17  */
  18
  19 #include <config.h>
  20
  21 #include "Text.h"
  22
  23 #include "Author.h"
  24 #include "Buffer.h"
  25 #include "buffer_funcs.h"
  26 #include "BufferParams.h"
  27 #include "BufferView.h"
  28 #include "Changes.h"
  29 #include "Cursor.h"
  30 #include "ParIterator.h"
  31 #include "CutAndPaste.h"
  32 #include "DispatchResult.h"
  33 #include "Encoding.h"
  34 #include "ErrorList.h"
  35 #include "FuncRequest.h"
  36 #include "factory.h"
  37 #include "FontIterator.h"
  38 #include "Language.h"
  39 #include "Length.h"
  40 #include "Lexer.h"
  41 #include "LyXRC.h"
  42 #include "Paragraph.h"
  43 #include "paragraph_funcs.h"
  44 #include "ParagraphParameters.h"
  45 #include "TextClass.h"
  46 #include "TextMetrics.h"
  47 #include "VSpace.h"
  48 #include "WordLangTuple.h"
  49
  50 #include "insets/InsetText.h"
  51 #include "insets/InsetBibitem.h"
  52 #include "insets/InsetCaption.h"
  53 #include "insets/InsetHFill.h"
  54 #include "insets/InsetLine.h"
  55 #include "insets/InsetNewline.h"
  56 #include "insets/InsetNewpage.h"
  57 #include "insets/InsetOptArg.h"
  58 #include "insets/InsetSpace.h"
  59 #include "insets/InsetSpecialChar.h"
  60 #include "insets/InsetTabular.h"
  61
  62 #include "support/convert.h"
  63 #include "support/debug.h"
  64 #include "support/docstream.h"
  65 #include "support/gettext.h"
  66 #include "support/lstrings.h"
  67 #include "support/textutils.h"
  68
  69 #include <boost/next_prior.hpp>
  70
  71 #include <sstream>
  72
  73 using namespace std;
  74 using namespace lyx::support;
  75
  76 namespace lyx {
  77
  78 using cap::cutSelection;
  79 using cap::pasteParagraphList;
  80
  81 namespace {
  82
  83 void readParToken(Buffer const & buf, Paragraph & par, Lexer & lex,
  84         string const & token, Font & font, Change & change, ErrorList & errorList)
  85 {
  86         BufferParams const & bp = buf.params();
  87
  88         if (token[0] != '\\') {
  89                 docstring dstr = lex.getDocString();
  90                 par.appendString(dstr, font, change);
  91
  92         } else if (token == "\\begin_layout") {
  93                 lex.eatLine();
  94                 docstring layoutname = lex.getDocString();
  95
  96                 font = Font(inherit_font, bp.language);
  97                 change = Change(Change::UNCHANGED);
  98
  99                 TextClass const & tclass = bp.textClass();
 100
 101                 if (layoutname.empty())
 102                         layoutname = tclass.defaultLayoutName();
 103
 104                 if (par.forceEmptyLayout()) {
 105                         // in this case only the empty layout is allowed
 106                         layoutname = tclass.emptyLayoutName();
 107                 } else if (par.useEmptyLayout()) {
 108                         // in this case, default layout maps to empty layout
 109                         if (layoutname == tclass.defaultLayoutName())
 110                                 layoutname = tclass.emptyLayoutName();
 111                 } else {
 112                         // otherwise, the empty layout maps to the default
 113                         if (layoutname == tclass.emptyLayoutName())
 114                                 layoutname = tclass.defaultLayoutName();
 115                 }
 116
 117                 bool hasLayout = tclass.hasLayout(layoutname);
 118
 119                 if (!hasLayout) {
 120                         errorList.push_back(ErrorItem(_("Unknown layout"),
 121                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 122                         layoutname, from_utf8(tclass.name())), par.id(), 0, par.size()));
 123                         layoutname = par.useEmptyLayout() ?
 124                                         tclass.emptyLayoutName() :
 125                                         tclass.defaultLayoutName();
 126                 }
 127
 128                 par.setLayout(bp.textClass()[layoutname]);
 129
 130                 // Test whether the layout is obsolete.
 131                 LayoutPtr const & layout = par.layout();
 132                 if (!layout->obsoleted_by().empty())
 133                         par.setLayout(bp.textClass()[layout->obsoleted_by()]);
 134
 135                 par.params().read(lex);
 136
 137         } else if (token == "\\end_layout") {
 138                 LYXERR0("Solitary \\end_layout in line " << lex.getLineNo() << "\n"
 139                        << "Missing \\begin_layout ?");
 140         } else if (token == "\\end_inset") {
 141                 LYXERR0("Solitary \\end_inset in line " << lex.getLineNo() << "\n"
 142                        << "Missing \\begin_inset ?");
 143         } else if (token == "\\begin_inset") {
 144                 Inset * inset = readInset(lex, buf);
 145                 if (inset)
 146                         par.insertInset(par.size(), inset, font, change);
 147                 else {
 148                         lex.eatLine();
 149                         docstring line = lex.getDocString();
 150                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 151                                             par.id(), 0, par.size()));
 152                 }
 153         } else if (token == "\\family") {
 154                 lex.next();
 155                 setLyXFamily(lex.getString(), font.fontInfo());
 156         } else if (token == "\\series") {
 157                 lex.next();
 158                 setLyXSeries(lex.getString(), font.fontInfo());
 159         } else if (token == "\\shape") {
 160                 lex.next();
 161                 setLyXShape(lex.getString(), font.fontInfo());
 162         } else if (token == "\\size") {
 163                 lex.next();
 164                 setLyXSize(lex.getString(), font.fontInfo());
 165         } else if (token == "\\lang") {
 166                 lex.next();
 167                 string const tok = lex.getString();
 168                 Language const * lang = languages.getLanguage(tok);
 169                 if (lang) {
 170                         font.setLanguage(lang);
 171                 } else {
 172                         font.setLanguage(bp.language);
 173                         lex.printError("Unknown language `$$Token'");
 174                 }
 175         } else if (token == "\\numeric") {
 176                 lex.next();
 177                 font.fontInfo().setNumber(font.setLyXMisc(lex.getString()));
 178         } else if (token == "\\emph") {
 179                 lex.next();
 180                 font.fontInfo().setEmph(font.setLyXMisc(lex.getString()));
 181         } else if (token == "\\bar") {
 182                 lex.next();
 183                 string const tok = lex.getString();
 184
 185                 if (tok == "under")
 186                         font.fontInfo().setUnderbar(FONT_ON);
 187                 else if (tok == "no")
 188                         font.fontInfo().setUnderbar(FONT_OFF);
 189                 else if (tok == "default")
 190                         font.fontInfo().setUnderbar(FONT_INHERIT);
 191                 else
 192                         lex.printError("Unknown bar font flag "
 193                                        "`$$Token'");
 194         } else if (token == "\\noun") {
 195                 lex.next();
 196                 font.fontInfo().setNoun(font.setLyXMisc(lex.getString()));
 197         } else if (token == "\\color") {
 198                 lex.next();
 199                 setLyXColor(lex.getString(), font.fontInfo());
 200         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 201
 202                 // Insets don't make sense in a free-spacing context! ---Kayvan
 203                 if (par.isFreeSpacing()) {
 204                         if (token == "\\InsetSpace")
 205                                 par.appendChar(' ', font, change);
 206                         else if (lex.isOK()) {
 207                                 lex.next();
 208                                 string const next_token = lex.getString();
 209                                 if (next_token == "\\-")
 210                                         par.appendChar('-', font, change);
 211                                 else {
 212                                         lex.printError("Token `$$Token' "
 213                                                        "is in free space "
 214                                                        "paragraph layout!");
 215                                 }
 216                         }
 217                 } else {
 218                         auto_ptr<Inset> inset;
 219                         if (token == "\\SpecialChar" )
 220                                 inset.reset(new InsetSpecialChar);
 221                         else
 222                                 inset.reset(new InsetSpace);
 223                         inset->read(lex);
 224                         par.insertInset(par.size(), inset.release(),
 225                                         font, change);
 226                 }
 227         } else if (token == "\\backslash") {
 228                 par.appendChar('\\', font, change);
 229         } else if (token == "\\linebreak") {
 230                 auto_ptr<Inset> inset(new InsetLinebreak);
 231                 inset->read(lex);
 232                 par.insertInset(par.size(), inset.release(), font, change);
 233         } else if (token == "\\newline") {
 234                 auto_ptr<Inset> inset(new InsetNewline);
 235                 inset->read(lex);
 236                 par.insertInset(par.size(), inset.release(), font, change);
 237         } else if (token == "\\LyXTable") {
 238                 auto_ptr<Inset> inset(new InsetTabular(buf));
 239                 inset->read(lex);
 240                 par.insertInset(par.size(), inset.release(), font, change);
 241         } else if (token == "\\hfill") {
 242                 par.insertInset(par.size(), new InsetHFill, font, change);
 243         } else if (token == "\\lyxline") {
 244                 par.insertInset(par.size(), new InsetLine, font, change);
 245         } else if (token == "\\newpage") {
 246                 par.insertInset(par.size(), new InsetNewpage, font, change);
 247         } else if (token == "\\pagebreak") {
 248                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 249         } else if (token == "\\clearpage") {
 250                 par.insertInset(par.size(), new InsetClearPage, font, change);
 251         } else if (token == "\\cleardoublepage") {
 252                 par.insertInset(par.size(), new InsetClearDoublePage, font, change);
 253         } else if (token == "\\change_unchanged") {
 254                 change = Change(Change::UNCHANGED);
 255         } else if (token == "\\change_inserted") {
 256                 lex.eatLine();
 257                 istringstream is(lex.getString());
 258                 unsigned int aid;
 259                 time_t ct;
 260                 is >> aid >> ct;
 261                 if (aid >= bp.author_map.size()) {
 262                         errorList.push_back(ErrorItem(_("Change tracking error"),
 263                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 264                                             par.id(), 0, par.size()));
 265                         change = Change(Change::UNCHANGED);
 266                 } else
 267                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 268         } else if (token == "\\change_deleted") {
 269                 lex.eatLine();
 270                 istringstream is(lex.getString());
 271                 unsigned int aid;
 272                 time_t ct;
 273                 is >> aid >> ct;
 274                 if (aid >= bp.author_map.size()) {
 275                         errorList.push_back(ErrorItem(_("Change tracking error"),
 276                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 277                                             par.id(), 0, par.size()));
 278                         change = Change(Change::UNCHANGED);
 279                 } else
 280                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 281         } else {
 282                 lex.eatLine();
 283                 errorList.push_back(ErrorItem(_("Unknown token"),
 284                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 285                         lex.getDocString()),
 286                         par.id(), 0, par.size()));
 287         }
 288 }
 289
 290
 291 void readParagraph(Buffer const & buf, Paragraph & par, Lexer & lex,
 292         ErrorList & errorList)
 293 {
 294         lex.nextToken();
 295         string token = lex.getString();
 296         Font font;
 297         Change change(Change::UNCHANGED);
 298
 299         while (lex.isOK()) {
 300                 readParToken(buf, par, lex, token, font, change, errorList);
 301
 302                 lex.nextToken();
 303                 token = lex.getString();
 304
 305                 if (token.empty())
 306                         continue;
 307
 308                 if (token == "\\end_layout") {
 309                         //Ok, paragraph finished
 310                         break;
 311                 }
 312
 313                 LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
 314                 if (token == "\\begin_layout" || token == "\\end_document"
 315                     || token == "\\end_inset" || token == "\\begin_deeper"
 316                     || token == "\\end_deeper") {
 317                         lex.pushToken(token);
 318                         lyxerr << "Paragraph ended in line "
 319                                << lex.getLineNo() << "\n"
 320                                << "Missing \\end_layout.\n";
 321                         break;
 322                 }
 323         }
 324         // Final change goes to paragraph break:
 325         par.setChange(par.size(), change);
 326
 327         // Initialize begin_of_body_ on load; redoParagraph maintains
 328         par.setBeginOfBody();
 329 }
 330
 331
 332 } // namespace anon
 333
 334
 335 bool Text::empty() const
 336 {
 337         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 338                 // FIXME: Should we consider the labeled type as empty too?
 339                 && pars_[0].layout()->labeltype == LABEL_NO_LABEL);
 340 }
 341
 342
 343 double Text::spacing(Buffer const & buffer, Paragraph const & par) const
 344 {
 345         if (par.params().spacing().isDefault())
 346                 return buffer.params().spacing().getValue();
 347         return par.params().spacing().getValue();
 348 }
 349
 350
 351 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 352 {
 353         BOOST_ASSERT(this == cur.text());
 354
 355         Paragraph & cpar = cur.paragraph();
 356         pit_type cpit = cur.pit();
 357
 358         TextClass const & tclass = cur.buffer().params().textClass();
 359         LayoutPtr const & layout = cpar.layout();
 360
 361         // this is only allowed, if the current paragraph is not empty
 362         // or caption and if it has not the keepempty flag active
 363         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 364             layout->labeltype != LABEL_SENSITIVE)
 365                 return;
 366
 367         // a layout change may affect also the following paragraph
 368         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 369
 370         // Always break behind a space
 371         // It is better to erase the space (Dekel)
 372         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 373                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
 374
 375         // What should the layout for the new paragraph be?
 376         bool keep_layout = inverse_logic ?
 377                 !layout->isEnvironment()
 378                 : layout->isEnvironment();
 379
 380         // We need to remember this before we break the paragraph, because
 381         // that invalidates the layout variable
 382         bool sensitive = layout->labeltype == LABEL_SENSITIVE;
 383
 384         // we need to set this before we insert the paragraph.
 385         bool const isempty = cpar.allowEmpty() && cpar.empty();
 386
 387         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
 388                          cur.pos(), keep_layout);
 389
 390         // After this, neither paragraph contains any rows!
 391
 392         cpit = cur.pit();
 393         pit_type next_par = cpit + 1;
 394
 395         // well this is the caption hack since one caption is really enough
 396         if (sensitive) {
 397                 if (cur.pos() == 0)
 398                         // set to standard-layout
 399                 //FIXME Check if this should be emptyLayout() in some cases
 400                         pars_[cpit].applyLayout(tclass.defaultLayout());
 401                 else
 402                         // set to standard-layout
 403                         //FIXME Check if this should be emptyLayout() in some cases
 404                         pars_[next_par].applyLayout(tclass.defaultLayout());
 405         }
 406
 407         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 408                 if (!pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges))
 409                         break; // the character couldn't be deleted physically due to change tracking
 410         }
 411
 412         updateLabels(cur.buffer());
 413
 414         // A singlePar update is not enough in this case.
 415         cur.updateFlags(Update::Force);
 416
 417         // This check is necessary. Otherwise the new empty paragraph will
 418         // be deleted automatically. And it is more friendly for the user!
 419         if (cur.pos() != 0 || isempty)
 420                 setCursor(cur, cur.pit() + 1, 0);
 421         else
 422                 setCursor(cur, cur.pit(), 0);
 423 }
 424
 425
 426 // insert a character, moves all the following breaks in the
 427 // same Paragraph one to the right and make a rebreak
 428 void Text::insertChar(Cursor & cur, char_type c)
 429 {
 430         BOOST_ASSERT(this == cur.text());
 431
 432         cur.recordUndo(INSERT_UNDO);
 433
 434         TextMetrics const & tm = cur.bv().textMetrics(this);
 435         Buffer const & buffer = cur.buffer();
 436         Paragraph & par = cur.paragraph();
 437         // try to remove this
 438         pit_type const pit = cur.pit();
 439
 440         bool const freeSpacing = par.layout()->free_spacing ||
 441                 par.isFreeSpacing();
 442
 443         if (lyxrc.auto_number) {
 444                 static docstring const number_operators = from_ascii("+-/*");
 445                 static docstring const number_unary_operators = from_ascii("+-");
 446                 static docstring const number_seperators = from_ascii(".,:");
 447
 448                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 449                         if (!isDigit(c) && !contains(number_operators, c) &&
 450                             !(contains(number_seperators, c) &&
 451                               cur.pos() != 0 &&
 452                               cur.pos() != cur.lastpos() &&
 453                               tm.getDisplayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 454                               tm.getDisplayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 455                            )
 456                                 number(cur); // Set current_font.number to OFF
 457                 } else if (isDigit(c) &&
 458                            cur.real_current_font.isVisibleRightToLeft()) {
 459                         number(cur); // Set current_font.number to ON
 460
 461                         if (cur.pos() != 0) {
 462                                 char_type const c = par.getChar(cur.pos() - 1);
 463                                 if (contains(number_unary_operators, c) &&
 464                                     (cur.pos() == 1
 465                                      || par.isSeparator(cur.pos() - 2)
 466                                      || par.isNewline(cur.pos() - 2))
 467                                   ) {
 468                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 469                                                 tm.font_);
 470                                 } else if (contains(number_seperators, c)
 471                                      && cur.pos() >= 2
 472                                      && tm.getDisplayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 473                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 474                                                 tm.font_);
 475                                 }
 476                         }
 477                 }
 478         }
 479
 480         // In Bidi text, we want spaces to be treated in a special way: spaces
 481         // which are between words in different languages should get the
 482         // paragraph's language; otherwise, spaces should keep the language
 483         // they were originally typed in. This is only in effect while typing;
 484         // after the text is already typed in, the user can always go back and
 485         // explicitly set the language of a space as desired. But 99.9% of the
 486         // time, what we're doing here is what the user actually meant.
 487         //
 488         // The following cases are the ones in which the language of the space
 489         // should be changed to match that of the containing paragraph. In the
 490         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 491         // represents a space, pipe (|) represents the cursor position (so the
 492         // character before it is the one just typed in). The different cases
 493         // are depicted logically (not visually), from left to right:
 494         //
 495         // 1. A_a|
 496         // 2. a_A|
 497         //
 498         // Theoretically, there are other situations that we should, perhaps, deal
 499         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 500         // point (to understand why, just try to create this situation...).
 501
 502         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 503                 // get font in front and behind the space in question. But do NOT
 504                 // use getFont(cur.pos()) because the character c is not inserted yet
 505                 Font const pre_space_font  = tm.getDisplayFont(cur.pit(), cur.pos() - 2);
 506                 Font const & post_space_font = cur.real_current_font;
 507                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 508                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 509
 510                 if (pre_space_rtl != post_space_rtl) {
 511                         // Set the space's language to match the language of the
 512                         // adjacent character whose direction is the paragraph's
 513                         // direction; don't touch other properties of the font
 514                         Language const * lang =
 515                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 516                                 pre_space_font.language() : post_space_font.language();
 517
 518                         Font space_font = tm.getDisplayFont(cur.pit(), cur.pos() - 1);
 519                         space_font.setLanguage(lang);
 520                         par.setFont(cur.pos() - 1, space_font);
 521                 }
 522         }
 523
 524         // Next check, if there will be two blanks together or a blank at
 525         // the beginning of a paragraph.
 526         // I decided to handle blanks like normal characters, the main
 527         // difference are the special checks when calculating the row.fill
 528         // (blank does not count at the end of a row) and the check here
 529
 530         // When the free-spacing option is set for the current layout,
 531         // disable the double-space checking
 532         if (!freeSpacing && isLineSeparatorChar(c)) {
 533                 if (cur.pos() == 0) {
 534                         static bool sent_space_message = false;
 535                         if (!sent_space_message) {
 536                                 cur.message(_("You cannot insert a space at the "
 537                                                            "beginning of a paragraph. Please read the Tutorial."));
 538                                 sent_space_message = true;
 539                         }
 540                         return;
 541                 }
 542                 BOOST_ASSERT(cur.pos() > 0);
 543                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 544                     && !par.isDeleted(cur.pos() - 1)) {
 545                         static bool sent_space_message = false;
 546                         if (!sent_space_message) {
 547                                 cur.message(_("You cannot type two spaces this way. "
 548                                                            "Please read the Tutorial."));
 549                                 sent_space_message = true;
 550                         }
 551                         return;
 552                 }
 553         }
 554
 555         par.insertChar(cur.pos(), c, cur.current_font, cur.buffer().params().trackChanges);
 556         cur.checkBufferStructure();
 557
 558 //              cur.updateFlags(Update::Force);
 559         setCursor(cur.top(), cur.pit(), cur.pos() + 1);
 560         charInserted(cur);
 561 }
 562
 563
 564 void Text::charInserted(Cursor & cur)
 565 {
 566         Paragraph & par = cur.paragraph();
 567
 568         // Here we call finishUndo for every 20 characters inserted.
 569         // This is from my experience how emacs does it. (Lgb)
 570         static unsigned int counter;
 571         if (counter < 20) {
 572                 ++counter;
 573         } else {
 574                 cur.finishUndo();
 575                 counter = 0;
 576         }
 577
 578         // register word if a non-letter was entered
 579         if (cur.pos() > 1
 580             && par.isLetter(cur.pos() - 2)
 581             && !par.isLetter(cur.pos() - 1)) {
 582                 // get the word in front of cursor
 583                 BOOST_ASSERT(this == cur.text());
 584                 cur.paragraph().updateWords(cur.buffer(), cur.top());
 585         }
 586 }
 587
 588
 589 // the cursor set functions have a special mechanism. When they
 590 // realize, that you left an empty paragraph, they will delete it.
 591
 592 bool Text::cursorForwardOneWord(Cursor & cur)
 593 {
 594         BOOST_ASSERT(this == cur.text());
 595
 596         Cursor old = cur;
 597
 598         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
 599                 ++old.pit();
 600                 old.pos() = 0;
 601         } else {
 602                 // Advance through word.
 603                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
 604                         ++old.pos();
 605                 // Skip through trailing nonword stuff.
 606                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
 607                         ++old.pos();
 608         }
 609         return setCursor(cur, old.pit(), old.pos());
 610 }
 611
 612
 613 bool Text::cursorBackwardOneWord(Cursor & cur)
 614 {
 615         BOOST_ASSERT(this == cur.text());
 616
 617         Cursor old = cur;
 618
 619         if (old.pos() == 0 && old.pit() != 0) {
 620                 --old.pit();
 621                 old.pos() = old.lastpos();
 622         } else {
 623                 // Skip through initial nonword stuff.
 624                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
 625                         --old.pos();
 626                 // Advance through word.
 627                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
 628                         --old.pos();
 629         }
 630         return setCursor(cur, old.pit(), old.pos());
 631 }
 632
 633
 634 void Text::selectWord(Cursor & cur, word_location loc)
 635 {
 636         BOOST_ASSERT(this == cur.text());
 637         CursorSlice from = cur.top();
 638         CursorSlice to = cur.top();
 639         getWord(from, to, loc);
 640         if (cur.top() != from)
 641                 setCursor(cur, from.pit(), from.pos());
 642         if (to == from)
 643                 return;
 644         cur.resetAnchor();
 645         setCursor(cur, to.pit(), to.pos());
 646         cur.setSelection();
 647 }
 648
 649
 650 // Select the word currently under the cursor when no
 651 // selection is currently set
 652 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
 653 {
 654         BOOST_ASSERT(this == cur.text());
 655         if (cur.selection())
 656                 return false;
 657         selectWord(cur, loc);
 658         return cur.selection();
 659 }
 660
 661
 662 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
 663 {
 664         BOOST_ASSERT(this == cur.text());
 665
 666         if (!cur.selection())
 667                 return;
 668
 669         cur.recordUndoSelection();
 670
 671         pit_type begPit = cur.selectionBegin().pit();
 672         pit_type endPit = cur.selectionEnd().pit();
 673
 674         pos_type begPos = cur.selectionBegin().pos();
 675         pos_type endPos = cur.selectionEnd().pos();
 676
 677         // keep selection info, because endPos becomes invalid after the first loop
 678         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
 679
 680         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
 681
 682         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 683                 pos_type parSize = pars_[pit].size();
 684
 685                 // ignore empty paragraphs; otherwise, an assertion will fail for
 686                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
 687                 if (parSize == 0)
 688                         continue;
 689
 690                 // do not consider first paragraph if the cursor starts at pos size()
 691                 if (pit == begPit && begPos == parSize)
 692                         continue;
 693
 694                 // do not consider last paragraph if the cursor ends at pos 0
 695                 if (pit == endPit && endPos == 0)
 696                         break; // last iteration anyway
 697
 698                 pos_type left  = (pit == begPit ? begPos : 0);
 699                 pos_type right = (pit == endPit ? endPos : parSize);
 700
 701                 if (op == ACCEPT) {
 702                         pars_[pit].acceptChanges(cur.buffer().params(), left, right);
 703                 } else {
 704                         pars_[pit].rejectChanges(cur.buffer().params(), left, right);
 705                 }
 706         }
 707
 708         // next, accept/reject imaginary end-of-par characters
 709
 710         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 711                 pos_type pos = pars_[pit].size();
 712
 713                 // skip if the selection ends before the end-of-par
 714                 if (pit == endPit && endsBeforeEndOfPar)
 715                         break; // last iteration anyway
 716
 717                 // skip if this is not the last paragraph of the document
 718                 // note: the user should be able to accept/reject the par break of the last par!
 719                 if (pit == endPit && pit + 1 != int(pars_.size()))
 720                         break; // last iteration anway
 721
 722                 if (op == ACCEPT) {
 723                         if (pars_[pit].isInserted(pos)) {
 724                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 725                         } else if (pars_[pit].isDeleted(pos)) {
 726                                 if (pit + 1 == int(pars_.size())) {
 727                                         // we cannot remove a par break at the end of the last paragraph;
 728                                         // instead, we mark it unchanged
 729                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 730                                 } else {
 731                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 732                                         --endPit;
 733                                         --pit;
 734                                 }
 735                         }
 736                 } else {
 737                         if (pars_[pit].isDeleted(pos)) {
 738                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 739                         } else if (pars_[pit].isInserted(pos)) {
 740                                 if (pit + 1 == int(pars_.size())) {
 741                                         // we mark the par break at the end of the last paragraph unchanged
 742                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 743                                 } else {
 744                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 745                                         --endPit;
 746                                         --pit;
 747                                 }
 748                         }
 749                 }
 750         }
 751
 752         // finally, invoke the DEPM
 753
 754         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer().params().trackChanges);
 755
 756         //
 757
 758         cur.finishUndo();
 759         cur.clearSelection();
 760         setCursorIntern(cur, begPit, begPos);
 761         cur.updateFlags(Update::Force);
 762         updateLabels(cur.buffer());
 763 }
 764
 765
 766 void Text::acceptChanges(BufferParams const & bparams)
 767 {
 768         lyx::acceptChanges(pars_, bparams);
 769         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
 770 }
 771
 772
 773 void Text::rejectChanges(BufferParams const & bparams)
 774 {
 775         pit_type pars_size = static_cast<pit_type>(pars_.size());
 776
 777         // first, reject changes within each individual paragraph
 778         // (do not consider end-of-par)
 779         for (pit_type pit = 0; pit < pars_size; ++pit) {
 780                 if (!pars_[pit].empty())   // prevent assertion failure
 781                         pars_[pit].rejectChanges(bparams, 0, pars_[pit].size());
 782         }
 783
 784         // next, reject imaginary end-of-par characters
 785         for (pit_type pit = 0; pit < pars_size; ++pit) {
 786                 pos_type pos = pars_[pit].size();
 787
 788                 if (pars_[pit].isDeleted(pos)) {
 789                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 790                 } else if (pars_[pit].isInserted(pos)) {
 791                         if (pit == pars_size - 1) {
 792                                 // we mark the par break at the end of the last
 793                                 // paragraph unchanged
 794                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 795                         } else {
 796                                 mergeParagraph(bparams, pars_, pit);
 797                                 --pit;
 798                                 --pars_size;
 799                         }
 800                 }
 801         }
 802
 803         // finally, invoke the DEPM
 804         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
 805 }
 806
 807
 808 void Text::deleteWordForward(Cursor & cur)
 809 {
 810         BOOST_ASSERT(this == cur.text());
 811         if (cur.lastpos() == 0)
 812                 cursorForward(cur);
 813         else {
 814                 cur.resetAnchor();
 815                 cur.selection() = true;
 816                 cursorForwardOneWord(cur);
 817                 cur.setSelection();
 818                 cutSelection(cur, true, false);
 819                 cur.checkBufferStructure();
 820         }
 821 }
 822
 823
 824 void Text::deleteWordBackward(Cursor & cur)
 825 {
 826         BOOST_ASSERT(this == cur.text());
 827         if (cur.lastpos() == 0)
 828                 cursorBackward(cur);
 829         else {
 830                 cur.resetAnchor();
 831                 cur.selection() = true;
 832                 cursorBackwardOneWord(cur);
 833                 cur.setSelection();
 834                 cutSelection(cur, true, false);
 835                 cur.checkBufferStructure();
 836         }
 837 }
 838
 839
 840 // Kill to end of line.
 841 void Text::changeCase(Cursor & cur, TextCase action)
 842 {
 843         BOOST_ASSERT(this == cur.text());
 844         CursorSlice from;
 845         CursorSlice to;
 846
 847         bool gotsel = false;
 848         if (cur.selection()) {
 849                 from = cur.selBegin();
 850                 to = cur.selEnd();
 851                 gotsel = true;
 852         } else {
 853                 from = cur.top();
 854                 getWord(from, to, PARTIAL_WORD);
 855                 cursorForwardOneWord(cur);
 856         }
 857
 858         cur.recordUndoSelection();
 859
 860         pit_type begPit = from.pit();
 861         pit_type endPit = to.pit();
 862
 863         pos_type begPos = from.pos();
 864         pos_type endPos = to.pos();
 865
 866         pos_type right = 0; // needed after the for loop
 867
 868         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 869                 Paragraph & par = pars_[pit];
 870                 pos_type const pos = (pit == begPit ? begPos : 0);
 871                 right = (pit == endPit ? endPos : par.size());
 872                 par.changeCase(cur.buffer().params(), pos, right, action);
 873         }
 874
 875         // the selection may have changed due to logically-only deleted chars
 876         if (gotsel) {
 877                 setCursor(cur, begPit, begPos);
 878                 cur.resetAnchor();
 879                 setCursor(cur, endPit, right);
 880                 cur.setSelection();
 881         } else
 882                 setCursor(cur, endPit, right);
 883
 884         cur.checkBufferStructure();
 885 }
 886
 887
 888 bool Text::handleBibitems(Cursor & cur)
 889 {
 890         if (cur.paragraph().layout()->labeltype != LABEL_BIBLIO)
 891                 return false;
 892
 893         if (cur.pos() != 0)
 894                 return false;
 895
 896         BufferParams const & bufparams = cur.buffer().params();
 897         Paragraph const & par = cur.paragraph();
 898         Cursor prevcur = cur;
 899         if (cur.pit() > 0) {
 900                 --prevcur.pit();
 901                 prevcur.pos() = prevcur.lastpos();
 902         }
 903         Paragraph const & prevpar = prevcur.paragraph();
 904
 905         // if a bibitem is deleted, merge with previous paragraph
 906         // if this is a bibliography item as well
 907         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
 908                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
 909                 mergeParagraph(bufparams, cur.text()->paragraphs(),
 910                                                         prevcur.pit());
 911                 updateLabels(cur.buffer());
 912                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
 913                 cur.updateFlags(Update::Force);
 914                 return true;
 915         }
 916
 917         // otherwise reset to default
 918         if (par.useEmptyLayout())
 919                 cur.paragraph().setLayout(bufparams.textClass().emptyLayout());
 920         else
 921                 cur.paragraph().setLayout(bufparams.textClass().defaultLayout());
 922         return true;
 923 }
 924
 925
 926 bool Text::erase(Cursor & cur)
 927 {
 928         BOOST_ASSERT(this == cur.text());
 929         bool needsUpdate = false;
 930         Paragraph & par = cur.paragraph();
 931
 932         if (cur.pos() != cur.lastpos()) {
 933                 // this is the code for a normal delete, not pasting
 934                 // any paragraphs
 935                 cur.recordUndo(DELETE_UNDO);
 936                 bool const was_inset = cur.paragraph().isInset(cur.pos());
 937                 if(!par.eraseChar(cur.pos(), cur.buffer().params().trackChanges))
 938                         // the character has been logically deleted only => skip it
 939                         cur.top().forwardPos();
 940
 941                 if (was_inset)
 942                         updateLabels(cur.buffer());
 943                 else
 944                         cur.checkBufferStructure();
 945                 needsUpdate = true;
 946         } else {
 947                 if (cur.pit() == cur.lastpit())
 948                         return dissolveInset(cur);
 949
 950                 if (!par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
 951                         par.setChange(cur.pos(), Change(Change::DELETED));
 952                         cur.forwardPos();
 953                         needsUpdate = true;
 954                 } else {
 955                         setCursorIntern(cur, cur.pit() + 1, 0);
 956                         needsUpdate = backspacePos0(cur);
 957                 }
 958         }
 959
 960         needsUpdate |= handleBibitems(cur);
 961
 962         if (needsUpdate) {
 963                 // Make sure the cursor is correct. Is this really needed?
 964                 // No, not really... at least not here!
 965                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
 966                 cur.checkBufferStructure();
 967         }
 968
 969         return needsUpdate;
 970 }
 971
 972
 973 bool Text::backspacePos0(Cursor & cur)
 974 {
 975         BOOST_ASSERT(this == cur.text());
 976         if (cur.pit() == 0)
 977                 return false;
 978
 979         bool needsUpdate = false;
 980
 981         BufferParams const & bufparams = cur.buffer().params();
 982         TextClass const & tclass = bufparams.textClass();
 983         ParagraphList & plist = cur.text()->paragraphs();
 984         Paragraph const & par = cur.paragraph();
 985         Cursor prevcur = cur;
 986         --prevcur.pit();
 987         prevcur.pos() = prevcur.lastpos();
 988         Paragraph const & prevpar = prevcur.paragraph();
 989
 990         // is it an empty paragraph?
 991         if (cur.lastpos() == 0
 992             || (cur.lastpos() == 1 && par.isSeparator(0))) {
 993                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
 994                 plist.erase(boost::next(plist.begin(), cur.pit()));
 995                 needsUpdate = true;
 996         }
 997         // is previous par empty?
 998         else if (prevcur.lastpos() == 0
 999                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1000                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1001                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1002                 needsUpdate = true;
1003         }
1004         // Pasting is not allowed, if the paragraphs have different
1005         // layouts. I think it is a real bug of all other
1006         // word processors to allow it. It confuses the user.
1007         // Correction: Pasting is always allowed with standard-layout
1008         // or the empty layout.
1009         else if (par.layout() == prevpar.layout()
1010                  || par.layout() == tclass.defaultLayout()
1011                  || par.layout() == tclass.emptyLayout()) {
1012                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1013                 mergeParagraph(bufparams, plist, prevcur.pit());
1014                 needsUpdate = true;
1015         }
1016
1017         if (needsUpdate) {
1018                 updateLabels(cur.buffer());
1019                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1020         }
1021
1022         return needsUpdate;
1023 }
1024
1025
1026 bool Text::backspace(Cursor & cur)
1027 {
1028         BOOST_ASSERT(this == cur.text());
1029         bool needsUpdate = false;
1030         if (cur.pos() == 0) {
1031                 if (cur.pit() == 0)
1032                         return dissolveInset(cur);
1033
1034                 Paragraph & prev_par = pars_[cur.pit() - 1];
1035
1036                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1037                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1038                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1039                         return true;
1040                 }
1041                 // The cursor is at the beginning of a paragraph, so
1042                 // the backspace will collapse two paragraphs into one.
1043                 needsUpdate = backspacePos0(cur);
1044
1045         } else {
1046                 // this is the code for a normal backspace, not pasting
1047                 // any paragraphs
1048                 cur.recordUndo(DELETE_UNDO);
1049                 // We used to do cursorBackwardIntern() here, but it is
1050                 // not a good idea since it triggers the auto-delete
1051                 // mechanism. So we do a cursorBackwardIntern()-lite,
1052                 // without the dreaded mechanism. (JMarc)
1053                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1054                                 false, cur.boundary());
1055                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1056                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1057                 if (was_inset)
1058                         updateLabels(cur.buffer());
1059                 else
1060                         cur.checkBufferStructure();
1061         }
1062
1063         if (cur.pos() == cur.lastpos())
1064                 cur.setCurrentFont();
1065
1066         needsUpdate |= handleBibitems(cur);
1067
1068         // A singlePar update is not enough in this case.
1069 //              cur.updateFlags(Update::Force);
1070         setCursor(cur.top(), cur.pit(), cur.pos());
1071
1072         return needsUpdate;
1073 }
1074
1075
1076 bool Text::dissolveInset(Cursor & cur) {
1077         BOOST_ASSERT(this == cur.text());
1078
1079         if (isMainText(cur.bv().buffer()) || cur.inset().nargs() != 1)
1080                 return false;
1081
1082         cur.recordUndoInset();
1083         cur.mark() = false;
1084         cur.selHandle(false);
1085         // save position
1086         pos_type spos = cur.pos();
1087         pit_type spit = cur.pit();
1088         ParagraphList plist;
1089         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1090                 plist = paragraphs();
1091         cur.popBackward();
1092         // store cursor offset
1093         if (spit == 0)
1094                 spos += cur.pos();
1095         spit += cur.pit();
1096         Buffer & b = cur.buffer();
1097         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1098         if (!plist.empty()) {
1099                 // ERT paragraphs have the Language latex_language.
1100                 // This is invalid outside of ERT, so we need to
1101                 // change it to the buffer language.
1102                 ParagraphList::iterator it = plist.begin();
1103                 ParagraphList::iterator it_end = plist.end();
1104                 for (; it != it_end; it++)
1105                         it->changeLanguage(b.params(), latex_language, b.language());
1106
1107                 pasteParagraphList(cur, plist, b.params().textClassPtr(),
1108                                    b.errorList("Paste"));
1109                 // restore position
1110                 cur.pit() = min(cur.lastpit(), spit);
1111                 cur.pos() = min(cur.lastpos(), spos);
1112         }
1113         cur.clearSelection();
1114         cur.resetAnchor();
1115         return true;
1116 }
1117
1118
1119 void Text::getWord(CursorSlice & from, CursorSlice & to,
1120         word_location const loc) const
1121 {
1122         Paragraph const & from_par = pars_[from.pit()];
1123         switch (loc) {
1124         case WHOLE_WORD_STRICT:
1125                 if (from.pos() == 0 || from.pos() == from_par.size()
1126                     || !from_par.isLetter(from.pos())
1127                     || !from_par.isLetter(from.pos() - 1)) {
1128                         to = from;
1129                         return;
1130                 }
1131                 // no break here, we go to the next
1132
1133         case WHOLE_WORD:
1134                 // If we are already at the beginning of a word, do nothing
1135                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1136                         break;
1137                 // no break here, we go to the next
1138
1139         case PREVIOUS_WORD:
1140                 // always move the cursor to the beginning of previous word
1141                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1142                         --from.pos();
1143                 break;
1144         case NEXT_WORD:
1145                 LYXERR0("Text::getWord: NEXT_WORD not implemented yet");
1146                 break;
1147         case PARTIAL_WORD:
1148                 // no need to move the 'from' cursor
1149                 break;
1150         }
1151         to = from;
1152         Paragraph const & to_par = pars_[to.pit()];
1153         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1154                 ++to.pos();
1155 }
1156
1157
1158 void Text::write(Buffer const & buf, ostream & os) const
1159 {
1160         ParagraphList::const_iterator pit = paragraphs().begin();
1161         ParagraphList::const_iterator end = paragraphs().end();
1162         depth_type dth = 0;
1163         for (; pit != end; ++pit)
1164                 pit->write(os, buf.params(), dth);
1165
1166         // Close begin_deeper
1167         for(; dth > 0; --dth)
1168                 os << "\n\\end_deeper";
1169 }
1170
1171
1172 bool Text::read(Buffer const & buf, Lexer & lex,
1173                 ErrorList & errorList, InsetText * insetPtr)
1174 {
1175         depth_type depth = 0;
1176
1177         while (lex.isOK()) {
1178                 lex.nextToken();
1179                 string const token = lex.getString();
1180
1181                 if (token.empty())
1182                         continue;
1183
1184                 if (token == "\\end_inset")
1185                         break;
1186
1187                 if (token == "\\end_body")
1188                         continue;
1189
1190                 if (token == "\\begin_body")
1191                         continue;
1192
1193                 if (token == "\\end_document")
1194                         return false;
1195
1196                 if (token == "\\begin_layout") {
1197                         lex.pushToken(token);
1198
1199                         Paragraph par;
1200                         par.params().depth(depth);
1201                         par.setFont(0, Font(inherit_font, buf.params().language));
1202                         par.setInsetOwner(insetPtr);
1203                         pars_.push_back(par);
1204
1205                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1206                         // not BufferParams
1207                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
1208
1209                         // register the words in the global word list
1210                         CursorSlice sl = CursorSlice(*insetPtr);
1211                         sl.pit() = pars_.size() - 1;
1212                         pars_.back().updateWords(buf, sl);
1213                 } else if (token == "\\begin_deeper") {
1214                         ++depth;
1215                 } else if (token == "\\end_deeper") {
1216                         if (!depth)
1217                                 lex.printError("\\end_deeper: " "depth is already null");
1218                         else
1219                                 --depth;
1220                 } else {
1221                         LYXERR0("Handling unknown body token: `" << token << '\'');
1222                 }
1223         }
1224         return true;
1225 }
1226
1227 // Returns the current font and depth as a message.
1228 docstring Text::currentState(Cursor & cur)
1229 {
1230         BOOST_ASSERT(this == cur.text());
1231         Buffer & buf = cur.buffer();
1232         Paragraph const & par = cur.paragraph();
1233         odocstringstream os;
1234
1235         if (buf.params().trackChanges)
1236                 os << _("[Change Tracking] ");
1237
1238         Change change = par.lookupChange(cur.pos());
1239
1240         if (change.type != Change::UNCHANGED) {
1241                 Author const & a = buf.params().authors().get(change.author);
1242                 os << _("Change: ") << a.name();
1243                 if (!a.email().empty())
1244                         os << " (" << a.email() << ")";
1245                 // FIXME ctime is english, we should translate that
1246                 os << _(" at ") << ctime(&change.changetime);
1247                 os << " : ";
1248         }
1249
1250         // I think we should only show changes from the default
1251         // font. (Asger)
1252         // No, from the document font (MV)
1253         Font font = cur.real_current_font;
1254         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1255
1256         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1257
1258         // The paragraph depth
1259         int depth = cur.paragraph().getDepth();
1260         if (depth > 0)
1261                 os << bformat(_(", Depth: %1$d"), depth);
1262
1263         // The paragraph spacing, but only if different from
1264         // buffer spacing.
1265         Spacing const & spacing = par.params().spacing();
1266         if (!spacing.isDefault()) {
1267                 os << _(", Spacing: ");
1268                 switch (spacing.getSpace()) {
1269                 case Spacing::Single:
1270                         os << _("Single");
1271                         break;
1272                 case Spacing::Onehalf:
1273                         os << _("OneHalf");
1274                         break;
1275                 case Spacing::Double:
1276                         os << _("Double");
1277                         break;
1278                 case Spacing::Other:
1279                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1280                         break;
1281                 case Spacing::Default:
1282                         // should never happen, do nothing
1283                         break;
1284                 }
1285         }
1286
1287 #ifdef DEVEL_VERSION
1288         os << _(", Inset: ") << &cur.inset();
1289         os << _(", Paragraph: ") << cur.pit();
1290         os << _(", Id: ") << par.id();
1291         os << _(", Position: ") << cur.pos();
1292         // FIXME: Why is the check for par.size() needed?
1293         // We are called with cur.pos() == par.size() quite often.
1294         if (!par.empty() && cur.pos() < par.size()) {
1295                 // Force output of code point, not character
1296                 size_t const c = par.getChar(cur.pos());
1297                 os << _(", Char: 0x") << hex << c;
1298         }
1299         os << _(", Boundary: ") << cur.boundary();
1300 //      Row & row = cur.textRow();
1301 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1302 #endif
1303         return os.str();
1304 }
1305
1306
1307 docstring Text::getPossibleLabel(Cursor & cur) const
1308 {
1309         pit_type pit = cur.pit();
1310
1311         LayoutPtr layout = pars_[pit].layout();
1312
1313         docstring text;
1314         docstring par_text = pars_[pit].asString(false);
1315         string piece;
1316         // the return string of math matrices might contain linebreaks
1317         par_text = subst(par_text, '\n', '-');
1318         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1319                 if (par_text.empty())
1320                         break;
1321                 docstring head;
1322                 par_text = split(par_text, head, ' ');
1323                 // Is it legal to use spaces in labels ?
1324                 if (i > 0)
1325                         text += '-';
1326                 text += head;
1327         }
1328
1329         // No need for a prefix if the user said so.
1330         if (lyxrc.label_init_length <= 0)
1331                 return text;
1332
1333         // Will contain the label type.
1334         docstring name;
1335
1336         // For section, subsection, etc...
1337         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1338                 LayoutPtr const & layout2 = pars_[pit - 1].layout();
1339                 if (layout2->latextype != LATEX_PARAGRAPH) {
1340                         --pit;
1341                         layout = layout2;
1342                 }
1343         }
1344         if (layout->latextype != LATEX_PARAGRAPH)
1345                 name = from_ascii(layout->latexname());
1346
1347         // for captions, we just take the caption type
1348         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
1349         if (caption_inset)
1350                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1351
1352         // If none of the above worked, we'll see if we're inside various
1353         // types of insets and take our abbreviation from them.
1354         if (name.empty()) {
1355                 InsetCode const codes[] = {
1356                         FLOAT_CODE,
1357                         WRAP_CODE,
1358                         FOOT_CODE
1359                 };
1360                 for (unsigned int i = 0; i < (sizeof codes / sizeof codes[0]); ++i) {
1361                         Inset * float_inset = cur.innerInsetOfType(codes[i]);
1362                         if (float_inset) {
1363                                 name = float_inset->name();
1364                                 break;
1365                         }
1366                 }
1367         }
1368
1369         // Create a correct prefix for prettyref
1370         if (name == "theorem")
1371                 name = from_ascii("thm");
1372         else if (name == "Foot")
1373                 name = from_ascii("fn");
1374         else if (name == "listing")
1375                 name = from_ascii("lst");
1376
1377         if (!name.empty())
1378                 text = name.substr(0, 3) + ':' + text;
1379
1380         return text;
1381 }
1382
1383
1384 void Text::charsTranspose(Cursor & cur)
1385 {
1386         BOOST_ASSERT(this == cur.text());
1387
1388         pos_type pos = cur.pos();
1389
1390         // If cursor is at beginning or end of paragraph, do nothing.
1391         if (pos == cur.lastpos() || pos == 0)
1392                 return;
1393
1394         Paragraph & par = cur.paragraph();
1395
1396         // Get the positions of the characters to be transposed.
1397         pos_type pos1 = pos - 1;
1398         pos_type pos2 = pos;
1399
1400         // In change tracking mode, ignore deleted characters.
1401         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1402                 ++pos2;
1403         if (pos2 == cur.lastpos())
1404                 return;
1405
1406         while (pos1 >= 0 && par.isDeleted(pos1))
1407                 --pos1;
1408         if (pos1 < 0)
1409                 return;
1410
1411         // Don't do anything if one of the "characters" is not regular text.
1412         if (par.isInset(pos1) || par.isInset(pos2))
1413                 return;
1414
1415         // Store the characters to be transposed (including font information).
1416         char_type char1 = par.getChar(pos1);
1417         Font const font1 =
1418                 par.getFontSettings(cur.buffer().params(), pos1);
1419
1420         char_type char2 = par.getChar(pos2);
1421         Font const font2 =
1422                 par.getFontSettings(cur.buffer().params(), pos2);
1423
1424         // And finally, we are ready to perform the transposition.
1425         // Track the changes if Change Tracking is enabled.
1426         bool const trackChanges = cur.buffer().params().trackChanges;
1427
1428         cur.recordUndo();
1429
1430         par.eraseChar(pos2, trackChanges);
1431         par.eraseChar(pos1, trackChanges);
1432         par.insertChar(pos1, char2, font2, trackChanges);
1433         par.insertChar(pos2, char1, font1, trackChanges);
1434
1435         cur.checkBufferStructure();
1436
1437         // After the transposition, move cursor to after the transposition.
1438         setCursor(cur, cur.pit(), pos2);
1439         cur.forwardPos();
1440 }
1441
1442
1443 DocIterator Text::macrocontextPosition() const
1444 {
1445         return macrocontext_position_;
1446 }
1447
1448
1449 void Text::setMacrocontextPosition(DocIterator const & pos)
1450 {
1451         macrocontext_position_ = pos;
1452 }
1453
1454
1455 } // namespace lyx