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 "CompletionList.h"
  30 #include "Cursor.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 "Language.h"
  38 #include "Length.h"
  39 #include "Lexer.h"
  40 #include "LyXRC.h"
  41 #include "Paragraph.h"
  42 #include "paragraph_funcs.h"
  43 #include "ParagraphParameters.h"
  44 #include "ParIterator.h"
  45 #include "TextClass.h"
  46 #include "TextMetrics.h"
  47 #include "VSpace.h"
  48 #include "WordLangTuple.h"
  49 #include "WordList.h"
  50
  51 #include "insets/InsetText.h"
  52 #include "insets/InsetBibitem.h"
  53 #include "insets/InsetCaption.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                 DocumentClass const & tclass = bp.documentClass();
 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.documentClass()[layoutname]);
 129
 130                 // Test whether the layout is obsolete.
 131                 Layout const & layout = par.layout();
 132                 if (!layout.obsoleted_by().empty())
 133                         par.setLayout(bp.documentClass()[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 == "\\SpecialChar") {
 201                         auto_ptr<Inset> inset;
 202                         inset.reset(new InsetSpecialChar);
 203                         inset->read(lex);
 204                         par.insertInset(par.size(), inset.release(),
 205                                         font, change);
 206         } else if (token == "\\backslash") {
 207                 par.appendChar('\\', font, change);
 208         } else if (token == "\\LyXTable") {
 209                 auto_ptr<Inset> inset(new InsetTabular(buf));
 210                 inset->read(lex);
 211                 par.insertInset(par.size(), inset.release(), font, change);
 212         } else if (token == "\\lyxline") {
 213                 par.insertInset(par.size(), new InsetLine, font, change);
 214         } else if (token == "\\change_unchanged") {
 215                 change = Change(Change::UNCHANGED);
 216         } else if (token == "\\change_inserted") {
 217                 lex.eatLine();
 218                 istringstream is(lex.getString());
 219                 unsigned int aid;
 220                 time_t ct;
 221                 is >> aid >> ct;
 222                 if (aid >= bp.author_map.size()) {
 223                         errorList.push_back(ErrorItem(_("Change tracking error"),
 224                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 225                                             par.id(), 0, par.size()));
 226                         change = Change(Change::UNCHANGED);
 227                 } else
 228                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 229         } else if (token == "\\change_deleted") {
 230                 lex.eatLine();
 231                 istringstream is(lex.getString());
 232                 unsigned int aid;
 233                 time_t ct;
 234                 is >> aid >> ct;
 235                 if (aid >= bp.author_map.size()) {
 236                         errorList.push_back(ErrorItem(_("Change tracking error"),
 237                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 238                                             par.id(), 0, par.size()));
 239                         change = Change(Change::UNCHANGED);
 240                 } else
 241                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 242         } else {
 243                 lex.eatLine();
 244                 errorList.push_back(ErrorItem(_("Unknown token"),
 245                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 246                         lex.getDocString()),
 247                         par.id(), 0, par.size()));
 248         }
 249 }
 250
 251
 252 void readParagraph(Buffer const & buf, Paragraph & par, Lexer & lex,
 253         ErrorList & errorList)
 254 {
 255         lex.nextToken();
 256         string token = lex.getString();
 257         Font font;
 258         Change change(Change::UNCHANGED);
 259
 260         while (lex.isOK()) {
 261                 readParToken(buf, par, lex, token, font, change, errorList);
 262
 263                 lex.nextToken();
 264                 token = lex.getString();
 265
 266                 if (token.empty())
 267                         continue;
 268
 269                 if (token == "\\end_layout") {
 270                         //Ok, paragraph finished
 271                         break;
 272                 }
 273
 274                 LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
 275                 if (token == "\\begin_layout" || token == "\\end_document"
 276                     || token == "\\end_inset" || token == "\\begin_deeper"
 277                     || token == "\\end_deeper") {
 278                         lex.pushToken(token);
 279                         lyxerr << "Paragraph ended in line "
 280                                << lex.getLineNo() << "\n"
 281                                << "Missing \\end_layout.\n";
 282                         break;
 283                 }
 284         }
 285         // Final change goes to paragraph break:
 286         par.setChange(par.size(), change);
 287
 288         // Initialize begin_of_body_ on load; redoParagraph maintains
 289         par.setBeginOfBody();
 290 }
 291
 292
 293 } // namespace anon
 294
 295 class TextCompletionList : public CompletionList
 296 {
 297 public:
 298         ///
 299         TextCompletionList(Cursor const & cur)
 300         : buf_(cur.buffer()), pos_(0) {}
 301         ///
 302         virtual ~TextCompletionList() {}
 303
 304         ///
 305         virtual bool sorted() const { return true; }
 306         ///
 307         virtual size_t size() const
 308         {
 309                 return theWordList().size();
 310         }
 311         ///
 312         virtual docstring const & data(size_t idx) const
 313         {
 314                 return theWordList().word(idx);
 315         }
 316
 317 private:
 318         ///
 319         Buffer const & buf_;
 320         ///
 321         size_t pos_;
 322 };
 323
 324
 325 bool Text::empty() const
 326 {
 327         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 328                 // FIXME: Should we consider the labeled type as empty too?
 329                 && pars_[0].layout().labeltype == LABEL_NO_LABEL);
 330 }
 331
 332
 333 double Text::spacing(Buffer const & buffer, Paragraph const & par) const
 334 {
 335         if (par.params().spacing().isDefault())
 336                 return buffer.params().spacing().getValue();
 337         return par.params().spacing().getValue();
 338 }
 339
 340
 341 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 342 {
 343         BOOST_ASSERT(this == cur.text());
 344
 345         Paragraph & cpar = cur.paragraph();
 346         pit_type cpit = cur.pit();
 347
 348         DocumentClass const & tclass = cur.buffer().params().documentClass();
 349         Layout const & layout = cpar.layout();
 350
 351         // this is only allowed, if the current paragraph is not empty
 352         // or caption and if it has not the keepempty flag active
 353         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 354             layout.labeltype != LABEL_SENSITIVE)
 355                 return;
 356
 357         // a layout change may affect also the following paragraph
 358         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 359
 360         // Always break behind a space
 361         // It is better to erase the space (Dekel)
 362         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 363                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
 364
 365         // What should the layout for the new paragraph be?
 366         bool keep_layout = inverse_logic ?
 367                 !layout.isEnvironment()
 368                 : layout.isEnvironment();
 369
 370         // We need to remember this before we break the paragraph, because
 371         // that invalidates the layout variable
 372         bool sensitive = layout.labeltype == LABEL_SENSITIVE;
 373
 374         // we need to set this before we insert the paragraph.
 375         bool const isempty = cpar.allowEmpty() && cpar.empty();
 376
 377         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
 378                          cur.pos(), keep_layout);
 379
 380         // After this, neither paragraph contains any rows!
 381
 382         cpit = cur.pit();
 383         pit_type next_par = cpit + 1;
 384
 385         // well this is the caption hack since one caption is really enough
 386         if (sensitive) {
 387                 if (cur.pos() == 0)
 388                         // set to standard-layout
 389                 //FIXME Check if this should be emptyLayout() in some cases
 390                         pars_[cpit].applyLayout(tclass.defaultLayout());
 391                 else
 392                         // set to standard-layout
 393                         //FIXME Check if this should be emptyLayout() in some cases
 394                         pars_[next_par].applyLayout(tclass.defaultLayout());
 395         }
 396
 397         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 398                 if (!pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges))
 399                         break; // the character couldn't be deleted physically due to change tracking
 400         }
 401
 402         updateLabels(cur.buffer());
 403
 404         // A singlePar update is not enough in this case.
 405         cur.updateFlags(Update::Force);
 406
 407         // This check is necessary. Otherwise the new empty paragraph will
 408         // be deleted automatically. And it is more friendly for the user!
 409         if (cur.pos() != 0 || isempty)
 410                 setCursor(cur, cur.pit() + 1, 0);
 411         else
 412                 setCursor(cur, cur.pit(), 0);
 413 }
 414
 415
 416 // insert a character, moves all the following breaks in the
 417 // same Paragraph one to the right and make a rebreak
 418 void Text::insertChar(Cursor & cur, char_type c)
 419 {
 420         BOOST_ASSERT(this == cur.text());
 421
 422         cur.recordUndo(INSERT_UNDO);
 423
 424         TextMetrics const & tm = cur.bv().textMetrics(this);
 425         Buffer const & buffer = cur.buffer();
 426         Paragraph & par = cur.paragraph();
 427         // try to remove this
 428         pit_type const pit = cur.pit();
 429
 430         bool const freeSpacing = par.layout().free_spacing ||
 431                 par.isFreeSpacing();
 432
 433         if (lyxrc.auto_number) {
 434                 static docstring const number_operators = from_ascii("+-/*");
 435                 static docstring const number_unary_operators = from_ascii("+-");
 436                 static docstring const number_seperators = from_ascii(".,:");
 437
 438                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 439                         if (!isDigit(c) && !contains(number_operators, c) &&
 440                             !(contains(number_seperators, c) &&
 441                               cur.pos() != 0 &&
 442                               cur.pos() != cur.lastpos() &&
 443                               tm.displayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 444                               tm.displayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 445                            )
 446                                 number(cur); // Set current_font.number to OFF
 447                 } else if (isDigit(c) &&
 448                            cur.real_current_font.isVisibleRightToLeft()) {
 449                         number(cur); // Set current_font.number to ON
 450
 451                         if (cur.pos() != 0) {
 452                                 char_type const c = par.getChar(cur.pos() - 1);
 453                                 if (contains(number_unary_operators, c) &&
 454                                     (cur.pos() == 1
 455                                      || par.isSeparator(cur.pos() - 2)
 456                                      || par.isNewline(cur.pos() - 2))
 457                                   ) {
 458                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 459                                                 tm.font_);
 460                                 } else if (contains(number_seperators, c)
 461                                      && cur.pos() >= 2
 462                                      && tm.displayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 463                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 464                                                 tm.font_);
 465                                 }
 466                         }
 467                 }
 468         }
 469
 470         // In Bidi text, we want spaces to be treated in a special way: spaces
 471         // which are between words in different languages should get the
 472         // paragraph's language; otherwise, spaces should keep the language
 473         // they were originally typed in. This is only in effect while typing;
 474         // after the text is already typed in, the user can always go back and
 475         // explicitly set the language of a space as desired. But 99.9% of the
 476         // time, what we're doing here is what the user actually meant.
 477         //
 478         // The following cases are the ones in which the language of the space
 479         // should be changed to match that of the containing paragraph. In the
 480         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 481         // represents a space, pipe (|) represents the cursor position (so the
 482         // character before it is the one just typed in). The different cases
 483         // are depicted logically (not visually), from left to right:
 484         //
 485         // 1. A_a|
 486         // 2. a_A|
 487         //
 488         // Theoretically, there are other situations that we should, perhaps, deal
 489         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 490         // point (to understand why, just try to create this situation...).
 491
 492         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 493                 // get font in front and behind the space in question. But do NOT
 494                 // use getFont(cur.pos()) because the character c is not inserted yet
 495                 Font const pre_space_font  = tm.displayFont(cur.pit(), cur.pos() - 2);
 496                 Font const & post_space_font = cur.real_current_font;
 497                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 498                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 499
 500                 if (pre_space_rtl != post_space_rtl) {
 501                         // Set the space's language to match the language of the
 502                         // adjacent character whose direction is the paragraph's
 503                         // direction; don't touch other properties of the font
 504                         Language const * lang =
 505                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 506                                 pre_space_font.language() : post_space_font.language();
 507
 508                         Font space_font = tm.displayFont(cur.pit(), cur.pos() - 1);
 509                         space_font.setLanguage(lang);
 510                         par.setFont(cur.pos() - 1, space_font);
 511                 }
 512         }
 513
 514         // Next check, if there will be two blanks together or a blank at
 515         // the beginning of a paragraph.
 516         // I decided to handle blanks like normal characters, the main
 517         // difference are the special checks when calculating the row.fill
 518         // (blank does not count at the end of a row) and the check here
 519
 520         // When the free-spacing option is set for the current layout,
 521         // disable the double-space checking
 522         if (!freeSpacing && isLineSeparatorChar(c)) {
 523                 if (cur.pos() == 0) {
 524                         static bool sent_space_message = false;
 525                         if (!sent_space_message) {
 526                                 cur.message(_("You cannot insert a space at the "
 527                                                            "beginning of a paragraph. Please read the Tutorial."));
 528                                 sent_space_message = true;
 529                         }
 530                         return;
 531                 }
 532                 BOOST_ASSERT(cur.pos() > 0);
 533                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 534                     && !par.isDeleted(cur.pos() - 1)) {
 535                         static bool sent_space_message = false;
 536                         if (!sent_space_message) {
 537                                 cur.message(_("You cannot type two spaces this way. "
 538                                                            "Please read the Tutorial."));
 539                                 sent_space_message = true;
 540                         }
 541                         return;
 542                 }
 543         }
 544
 545         par.insertChar(cur.pos(), c, cur.current_font, cur.buffer().params().trackChanges);
 546         cur.checkBufferStructure();
 547
 548 //              cur.updateFlags(Update::Force);
 549         setCursor(cur.top(), cur.pit(), cur.pos() + 1);
 550         charInserted(cur);
 551 }
 552
 553
 554 void Text::charInserted(Cursor & cur)
 555 {
 556         Paragraph & par = cur.paragraph();
 557
 558         // Here we call finishUndo for every 20 characters inserted.
 559         // This is from my experience how emacs does it. (Lgb)
 560         static unsigned int counter;
 561         if (counter < 20) {
 562                 ++counter;
 563         } else {
 564                 cur.finishUndo();
 565                 counter = 0;
 566         }
 567
 568         // register word if a non-letter was entered
 569         if (cur.pos() > 1
 570             && par.isLetter(cur.pos() - 2)
 571             && !par.isLetter(cur.pos() - 1)) {
 572                 // get the word in front of cursor
 573                 BOOST_ASSERT(this == cur.text());
 574                 cur.paragraph().updateWords(cur.top());
 575         }
 576 }
 577
 578
 579 // the cursor set functions have a special mechanism. When they
 580 // realize, that you left an empty paragraph, they will delete it.
 581
 582 bool Text::cursorForwardOneWord(Cursor & cur)
 583 {
 584         BOOST_ASSERT(this == cur.text());
 585
 586         Cursor old = cur;
 587
 588         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
 589                 ++old.pit();
 590                 old.pos() = 0;
 591         } else {
 592                 // Advance through word.
 593                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
 594                         ++old.pos();
 595                 // Skip through trailing nonword stuff.
 596                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
 597                         ++old.pos();
 598         }
 599         return setCursor(cur, old.pit(), old.pos());
 600 }
 601
 602
 603 bool Text::cursorBackwardOneWord(Cursor & cur)
 604 {
 605         BOOST_ASSERT(this == cur.text());
 606
 607         Cursor old = cur;
 608
 609         if (old.pos() == 0 && old.pit() != 0) {
 610                 --old.pit();
 611                 old.pos() = old.lastpos();
 612         } else {
 613                 // Skip through initial nonword stuff.
 614                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
 615                         --old.pos();
 616                 // Advance through word.
 617                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
 618                         --old.pos();
 619         }
 620         return setCursor(cur, old.pit(), old.pos());
 621 }
 622
 623
 624 void Text::selectWord(Cursor & cur, word_location loc)
 625 {
 626         BOOST_ASSERT(this == cur.text());
 627         CursorSlice from = cur.top();
 628         CursorSlice to = cur.top();
 629         getWord(from, to, loc);
 630         if (cur.top() != from)
 631                 setCursor(cur, from.pit(), from.pos());
 632         if (to == from)
 633                 return;
 634         cur.resetAnchor();
 635         setCursor(cur, to.pit(), to.pos());
 636         cur.setSelection();
 637 }
 638
 639
 640 // Select the word currently under the cursor when no
 641 // selection is currently set
 642 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
 643 {
 644         BOOST_ASSERT(this == cur.text());
 645         if (cur.selection())
 646                 return false;
 647         selectWord(cur, loc);
 648         return cur.selection();
 649 }
 650
 651
 652 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
 653 {
 654         BOOST_ASSERT(this == cur.text());
 655
 656         if (!cur.selection())
 657                 return;
 658
 659         cur.recordUndoSelection();
 660
 661         pit_type begPit = cur.selectionBegin().pit();
 662         pit_type endPit = cur.selectionEnd().pit();
 663
 664         pos_type begPos = cur.selectionBegin().pos();
 665         pos_type endPos = cur.selectionEnd().pos();
 666
 667         // keep selection info, because endPos becomes invalid after the first loop
 668         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
 669
 670         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
 671
 672         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 673                 pos_type parSize = pars_[pit].size();
 674
 675                 // ignore empty paragraphs; otherwise, an assertion will fail for
 676                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
 677                 if (parSize == 0)
 678                         continue;
 679
 680                 // do not consider first paragraph if the cursor starts at pos size()
 681                 if (pit == begPit && begPos == parSize)
 682                         continue;
 683
 684                 // do not consider last paragraph if the cursor ends at pos 0
 685                 if (pit == endPit && endPos == 0)
 686                         break; // last iteration anyway
 687
 688                 pos_type left  = (pit == begPit ? begPos : 0);
 689                 pos_type right = (pit == endPit ? endPos : parSize);
 690
 691                 if (op == ACCEPT) {
 692                         pars_[pit].acceptChanges(cur.buffer().params(), left, right);
 693                 } else {
 694                         pars_[pit].rejectChanges(cur.buffer().params(), left, right);
 695                 }
 696         }
 697
 698         // next, accept/reject imaginary end-of-par characters
 699
 700         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 701                 pos_type pos = pars_[pit].size();
 702
 703                 // skip if the selection ends before the end-of-par
 704                 if (pit == endPit && endsBeforeEndOfPar)
 705                         break; // last iteration anyway
 706
 707                 // skip if this is not the last paragraph of the document
 708                 // note: the user should be able to accept/reject the par break of the last par!
 709                 if (pit == endPit && pit + 1 != int(pars_.size()))
 710                         break; // last iteration anway
 711
 712                 if (op == ACCEPT) {
 713                         if (pars_[pit].isInserted(pos)) {
 714                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 715                         } else if (pars_[pit].isDeleted(pos)) {
 716                                 if (pit + 1 == int(pars_.size())) {
 717                                         // we cannot remove a par break at the end of the last paragraph;
 718                                         // instead, we mark it unchanged
 719                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 720                                 } else {
 721                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 722                                         --endPit;
 723                                         --pit;
 724                                 }
 725                         }
 726                 } else {
 727                         if (pars_[pit].isDeleted(pos)) {
 728                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 729                         } else if (pars_[pit].isInserted(pos)) {
 730                                 if (pit + 1 == int(pars_.size())) {
 731                                         // we mark the par break at the end of the last paragraph unchanged
 732                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 733                                 } else {
 734                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 735                                         --endPit;
 736                                         --pit;
 737                                 }
 738                         }
 739                 }
 740         }
 741
 742         // finally, invoke the DEPM
 743
 744         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer().params().trackChanges);
 745
 746         //
 747
 748         cur.finishUndo();
 749         cur.clearSelection();
 750         setCursorIntern(cur, begPit, begPos);
 751         cur.updateFlags(Update::Force);
 752         updateLabels(cur.buffer());
 753 }
 754
 755
 756 void Text::acceptChanges(BufferParams const & bparams)
 757 {
 758         lyx::acceptChanges(pars_, bparams);
 759         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
 760 }
 761
 762
 763 void Text::rejectChanges(BufferParams const & bparams)
 764 {
 765         pit_type pars_size = static_cast<pit_type>(pars_.size());
 766
 767         // first, reject changes within each individual paragraph
 768         // (do not consider end-of-par)
 769         for (pit_type pit = 0; pit < pars_size; ++pit) {
 770                 if (!pars_[pit].empty())   // prevent assertion failure
 771                         pars_[pit].rejectChanges(bparams, 0, pars_[pit].size());
 772         }
 773
 774         // next, reject imaginary end-of-par characters
 775         for (pit_type pit = 0; pit < pars_size; ++pit) {
 776                 pos_type pos = pars_[pit].size();
 777
 778                 if (pars_[pit].isDeleted(pos)) {
 779                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 780                 } else if (pars_[pit].isInserted(pos)) {
 781                         if (pit == pars_size - 1) {
 782                                 // we mark the par break at the end of the last
 783                                 // paragraph unchanged
 784                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 785                         } else {
 786                                 mergeParagraph(bparams, pars_, pit);
 787                                 --pit;
 788                                 --pars_size;
 789                         }
 790                 }
 791         }
 792
 793         // finally, invoke the DEPM
 794         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
 795 }
 796
 797
 798 void Text::deleteWordForward(Cursor & cur)
 799 {
 800         BOOST_ASSERT(this == cur.text());
 801         if (cur.lastpos() == 0)
 802                 cursorForward(cur);
 803         else {
 804                 cur.resetAnchor();
 805                 cur.selection() = true;
 806                 cursorForwardOneWord(cur);
 807                 cur.setSelection();
 808                 cutSelection(cur, true, false);
 809                 cur.checkBufferStructure();
 810         }
 811 }
 812
 813
 814 void Text::deleteWordBackward(Cursor & cur)
 815 {
 816         BOOST_ASSERT(this == cur.text());
 817         if (cur.lastpos() == 0)
 818                 cursorBackward(cur);
 819         else {
 820                 cur.resetAnchor();
 821                 cur.selection() = true;
 822                 cursorBackwardOneWord(cur);
 823                 cur.setSelection();
 824                 cutSelection(cur, true, false);
 825                 cur.checkBufferStructure();
 826         }
 827 }
 828
 829
 830 // Kill to end of line.
 831 void Text::changeCase(Cursor & cur, TextCase action)
 832 {
 833         BOOST_ASSERT(this == cur.text());
 834         CursorSlice from;
 835         CursorSlice to;
 836
 837         bool gotsel = false;
 838         if (cur.selection()) {
 839                 from = cur.selBegin();
 840                 to = cur.selEnd();
 841                 gotsel = true;
 842         } else {
 843                 from = cur.top();
 844                 getWord(from, to, PARTIAL_WORD);
 845                 cursorForwardOneWord(cur);
 846         }
 847
 848         cur.recordUndoSelection();
 849
 850         pit_type begPit = from.pit();
 851         pit_type endPit = to.pit();
 852
 853         pos_type begPos = from.pos();
 854         pos_type endPos = to.pos();
 855
 856         pos_type right = 0; // needed after the for loop
 857
 858         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 859                 Paragraph & par = pars_[pit];
 860                 pos_type const pos = (pit == begPit ? begPos : 0);
 861                 right = (pit == endPit ? endPos : par.size());
 862                 par.changeCase(cur.buffer().params(), pos, right, action);
 863         }
 864
 865         // the selection may have changed due to logically-only deleted chars
 866         if (gotsel) {
 867                 setCursor(cur, begPit, begPos);
 868                 cur.resetAnchor();
 869                 setCursor(cur, endPit, right);
 870                 cur.setSelection();
 871         } else
 872                 setCursor(cur, endPit, right);
 873
 874         cur.checkBufferStructure();
 875 }
 876
 877
 878 bool Text::handleBibitems(Cursor & cur)
 879 {
 880         if (cur.paragraph().layout().labeltype != LABEL_BIBLIO)
 881                 return false;
 882
 883         if (cur.pos() != 0)
 884                 return false;
 885
 886         BufferParams const & bufparams = cur.buffer().params();
 887         Paragraph const & par = cur.paragraph();
 888         Cursor prevcur = cur;
 889         if (cur.pit() > 0) {
 890                 --prevcur.pit();
 891                 prevcur.pos() = prevcur.lastpos();
 892         }
 893         Paragraph const & prevpar = prevcur.paragraph();
 894
 895         // if a bibitem is deleted, merge with previous paragraph
 896         // if this is a bibliography item as well
 897         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
 898                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
 899                 mergeParagraph(bufparams, cur.text()->paragraphs(),
 900                                                         prevcur.pit());
 901                 updateLabels(cur.buffer());
 902                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
 903                 cur.updateFlags(Update::Force);
 904                 return true;
 905         }
 906
 907         // otherwise reset to default
 908         cur.paragraph().setEmptyOrDefaultLayout(bufparams.documentClass());
 909         return true;
 910 }
 911
 912
 913 bool Text::erase(Cursor & cur)
 914 {
 915         BOOST_ASSERT(this == cur.text());
 916         bool needsUpdate = false;
 917         Paragraph & par = cur.paragraph();
 918
 919         if (cur.pos() != cur.lastpos()) {
 920                 // this is the code for a normal delete, not pasting
 921                 // any paragraphs
 922                 cur.recordUndo(DELETE_UNDO);
 923                 bool const was_inset = cur.paragraph().isInset(cur.pos());
 924                 if(!par.eraseChar(cur.pos(), cur.buffer().params().trackChanges))
 925                         // the character has been logically deleted only => skip it
 926                         cur.top().forwardPos();
 927
 928                 if (was_inset)
 929                         updateLabels(cur.buffer());
 930                 else
 931                         cur.checkBufferStructure();
 932                 needsUpdate = true;
 933         } else {
 934                 if (cur.pit() == cur.lastpit())
 935                         return dissolveInset(cur);
 936
 937                 if (!par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
 938                         par.setChange(cur.pos(), Change(Change::DELETED));
 939                         cur.forwardPos();
 940                         needsUpdate = true;
 941                 } else {
 942                         setCursorIntern(cur, cur.pit() + 1, 0);
 943                         needsUpdate = backspacePos0(cur);
 944                 }
 945         }
 946
 947         needsUpdate |= handleBibitems(cur);
 948
 949         if (needsUpdate) {
 950                 // Make sure the cursor is correct. Is this really needed?
 951                 // No, not really... at least not here!
 952                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
 953                 cur.checkBufferStructure();
 954         }
 955
 956         return needsUpdate;
 957 }
 958
 959
 960 bool Text::backspacePos0(Cursor & cur)
 961 {
 962         BOOST_ASSERT(this == cur.text());
 963         if (cur.pit() == 0)
 964                 return false;
 965
 966         bool needsUpdate = false;
 967
 968         BufferParams const & bufparams = cur.buffer().params();
 969         DocumentClass const & tclass = bufparams.documentClass();
 970         ParagraphList & plist = cur.text()->paragraphs();
 971         Paragraph const & par = cur.paragraph();
 972         Cursor prevcur = cur;
 973         --prevcur.pit();
 974         prevcur.pos() = prevcur.lastpos();
 975         Paragraph const & prevpar = prevcur.paragraph();
 976
 977         // is it an empty paragraph?
 978         if (cur.lastpos() == 0
 979             || (cur.lastpos() == 1 && par.isSeparator(0))) {
 980                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
 981                 plist.erase(boost::next(plist.begin(), cur.pit()));
 982                 needsUpdate = true;
 983         }
 984         // is previous par empty?
 985         else if (prevcur.lastpos() == 0
 986                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
 987                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
 988                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
 989                 needsUpdate = true;
 990         }
 991         // Pasting is not allowed, if the paragraphs have different
 992         // layouts. I think it is a real bug of all other
 993         // word processors to allow it. It confuses the user.
 994         // Correction: Pasting is always allowed with standard-layout
 995         // or the empty layout.
 996         else if (par.layout() == prevpar.layout()
 997                  || tclass.isDefaultLayout(par.layout())
 998                  || tclass.isEmptyLayout(par.layout())) {
 999                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1000                 mergeParagraph(bufparams, plist, prevcur.pit());
1001                 needsUpdate = true;
1002         }
1003
1004         if (needsUpdate) {
1005                 updateLabels(cur.buffer());
1006                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1007         }
1008
1009         return needsUpdate;
1010 }
1011
1012
1013 bool Text::backspace(Cursor & cur)
1014 {
1015         BOOST_ASSERT(this == cur.text());
1016         bool needsUpdate = false;
1017         if (cur.pos() == 0) {
1018                 if (cur.pit() == 0)
1019                         return dissolveInset(cur);
1020
1021                 Paragraph & prev_par = pars_[cur.pit() - 1];
1022
1023                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1024                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1025                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1026                         return true;
1027                 }
1028                 // The cursor is at the beginning of a paragraph, so
1029                 // the backspace will collapse two paragraphs into one.
1030                 needsUpdate = backspacePos0(cur);
1031
1032         } else {
1033                 // this is the code for a normal backspace, not pasting
1034                 // any paragraphs
1035                 cur.recordUndo(DELETE_UNDO);
1036                 // We used to do cursorBackwardIntern() here, but it is
1037                 // not a good idea since it triggers the auto-delete
1038                 // mechanism. So we do a cursorBackwardIntern()-lite,
1039                 // without the dreaded mechanism. (JMarc)
1040                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1041                                 false, cur.boundary());
1042                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1043                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1044                 if (was_inset)
1045                         updateLabels(cur.buffer());
1046                 else
1047                         cur.checkBufferStructure();
1048         }
1049
1050         if (cur.pos() == cur.lastpos())
1051                 cur.setCurrentFont();
1052
1053         needsUpdate |= handleBibitems(cur);
1054
1055         // A singlePar update is not enough in this case.
1056 //              cur.updateFlags(Update::Force);
1057         setCursor(cur.top(), cur.pit(), cur.pos());
1058
1059         return needsUpdate;
1060 }
1061
1062
1063 bool Text::dissolveInset(Cursor & cur) {
1064         BOOST_ASSERT(this == cur.text());
1065
1066         if (isMainText(cur.bv().buffer()) || cur.inset().nargs() != 1)
1067                 return false;
1068
1069         cur.recordUndoInset();
1070         cur.mark() = false;
1071         cur.selHandle(false);
1072         // save position
1073         pos_type spos = cur.pos();
1074         pit_type spit = cur.pit();
1075         ParagraphList plist;
1076         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1077                 plist = paragraphs();
1078         cur.popBackward();
1079         // store cursor offset
1080         if (spit == 0)
1081                 spos += cur.pos();
1082         spit += cur.pit();
1083         Buffer & b = cur.buffer();
1084         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1085         if (!plist.empty()) {
1086                 // ERT paragraphs have the Language latex_language.
1087                 // This is invalid outside of ERT, so we need to
1088                 // change it to the buffer language.
1089                 ParagraphList::iterator it = plist.begin();
1090                 ParagraphList::iterator it_end = plist.end();
1091                 for (; it != it_end; it++)
1092                         it->changeLanguage(b.params(), latex_language, b.language());
1093
1094                 pasteParagraphList(cur, plist, b.params().documentClassPtr(),
1095                                    b.errorList("Paste"));
1096                 // restore position
1097                 cur.pit() = min(cur.lastpit(), spit);
1098                 cur.pos() = min(cur.lastpos(), spos);
1099         }
1100         cur.clearSelection();
1101         cur.resetAnchor();
1102         return true;
1103 }
1104
1105
1106 void Text::getWord(CursorSlice & from, CursorSlice & to,
1107         word_location const loc) const
1108 {
1109         Paragraph const & from_par = pars_[from.pit()];
1110         switch (loc) {
1111         case WHOLE_WORD_STRICT:
1112                 if (from.pos() == 0 || from.pos() == from_par.size()
1113                     || !from_par.isLetter(from.pos())
1114                     || !from_par.isLetter(from.pos() - 1)) {
1115                         to = from;
1116                         return;
1117                 }
1118                 // no break here, we go to the next
1119
1120         case WHOLE_WORD:
1121                 // If we are already at the beginning of a word, do nothing
1122                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1123                         break;
1124                 // no break here, we go to the next
1125
1126         case PREVIOUS_WORD:
1127                 // always move the cursor to the beginning of previous word
1128                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1129                         --from.pos();
1130                 break;
1131         case NEXT_WORD:
1132                 LYXERR0("Text::getWord: NEXT_WORD not implemented yet");
1133                 break;
1134         case PARTIAL_WORD:
1135                 // no need to move the 'from' cursor
1136                 break;
1137         }
1138         to = from;
1139         Paragraph const & to_par = pars_[to.pit()];
1140         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1141                 ++to.pos();
1142 }
1143
1144
1145 void Text::write(Buffer const & buf, ostream & os) const
1146 {
1147         ParagraphList::const_iterator pit = paragraphs().begin();
1148         ParagraphList::const_iterator end = paragraphs().end();
1149         depth_type dth = 0;
1150         for (; pit != end; ++pit)
1151                 pit->write(os, buf.params(), dth);
1152
1153         // Close begin_deeper
1154         for(; dth > 0; --dth)
1155                 os << "\n\\end_deeper";
1156 }
1157
1158
1159 bool Text::read(Buffer const & buf, Lexer & lex,
1160                 ErrorList & errorList, InsetText * insetPtr)
1161 {
1162         depth_type depth = 0;
1163
1164         while (lex.isOK()) {
1165                 lex.nextToken();
1166                 string const token = lex.getString();
1167
1168                 if (token.empty())
1169                         continue;
1170
1171                 if (token == "\\end_inset")
1172                         break;
1173
1174                 if (token == "\\end_body")
1175                         continue;
1176
1177                 if (token == "\\begin_body")
1178                         continue;
1179
1180                 if (token == "\\end_document")
1181                         return false;
1182
1183                 if (token == "\\begin_layout") {
1184                         lex.pushToken(token);
1185
1186                         Paragraph par;
1187                         par.params().depth(depth);
1188                         par.setFont(0, Font(inherit_font, buf.params().language));
1189                         par.setInsetOwner(insetPtr);
1190                         pars_.push_back(par);
1191
1192                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1193                         // not BufferParams
1194                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
1195
1196                         // register the words in the global word list
1197                         CursorSlice sl = CursorSlice(*insetPtr);
1198                         sl.pit() = pars_.size() - 1;
1199                         pars_.back().updateWords(sl);
1200                 } else if (token == "\\begin_deeper") {
1201                         ++depth;
1202                 } else if (token == "\\end_deeper") {
1203                         if (!depth)
1204                                 lex.printError("\\end_deeper: " "depth is already null");
1205                         else
1206                                 --depth;
1207                 } else {
1208                         LYXERR0("Handling unknown body token: `" << token << '\'');
1209                 }
1210         }
1211         return true;
1212 }
1213
1214 // Returns the current font and depth as a message.
1215 docstring Text::currentState(Cursor & cur)
1216 {
1217         BOOST_ASSERT(this == cur.text());
1218         Buffer & buf = cur.buffer();
1219         Paragraph const & par = cur.paragraph();
1220         odocstringstream os;
1221
1222         if (buf.params().trackChanges)
1223                 os << _("[Change Tracking] ");
1224
1225         Change change = par.lookupChange(cur.pos());
1226
1227         if (change.type != Change::UNCHANGED) {
1228                 Author const & a = buf.params().authors().get(change.author);
1229                 os << _("Change: ") << a.name();
1230                 if (!a.email().empty())
1231                         os << " (" << a.email() << ")";
1232                 // FIXME ctime is english, we should translate that
1233                 os << _(" at ") << ctime(&change.changetime);
1234                 os << " : ";
1235         }
1236
1237         // I think we should only show changes from the default
1238         // font. (Asger)
1239         // No, from the document font (MV)
1240         Font font = cur.real_current_font;
1241         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1242
1243         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1244
1245         // The paragraph depth
1246         int depth = cur.paragraph().getDepth();
1247         if (depth > 0)
1248                 os << bformat(_(", Depth: %1$d"), depth);
1249
1250         // The paragraph spacing, but only if different from
1251         // buffer spacing.
1252         Spacing const & spacing = par.params().spacing();
1253         if (!spacing.isDefault()) {
1254                 os << _(", Spacing: ");
1255                 switch (spacing.getSpace()) {
1256                 case Spacing::Single:
1257                         os << _("Single");
1258                         break;
1259                 case Spacing::Onehalf:
1260                         os << _("OneHalf");
1261                         break;
1262                 case Spacing::Double:
1263                         os << _("Double");
1264                         break;
1265                 case Spacing::Other:
1266                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1267                         break;
1268                 case Spacing::Default:
1269                         // should never happen, do nothing
1270                         break;
1271                 }
1272         }
1273
1274 #ifdef DEVEL_VERSION
1275         os << _(", Inset: ") << &cur.inset();
1276         os << _(", Paragraph: ") << cur.pit();
1277         os << _(", Id: ") << par.id();
1278         os << _(", Position: ") << cur.pos();
1279         // FIXME: Why is the check for par.size() needed?
1280         // We are called with cur.pos() == par.size() quite often.
1281         if (!par.empty() && cur.pos() < par.size()) {
1282                 // Force output of code point, not character
1283                 size_t const c = par.getChar(cur.pos());
1284                 os << _(", Char: 0x") << hex << c;
1285         }
1286         os << _(", Boundary: ") << cur.boundary();
1287 //      Row & row = cur.textRow();
1288 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1289 #endif
1290         return os.str();
1291 }
1292
1293
1294 docstring Text::getPossibleLabel(Cursor & cur) const
1295 {
1296         pit_type pit = cur.pit();
1297
1298         Layout const * layout = &(pars_[pit].layout());
1299
1300         docstring text;
1301         docstring par_text = pars_[pit].asString(false);
1302         string piece;
1303         // the return string of math matrices might contain linebreaks
1304         par_text = subst(par_text, '\n', '-');
1305         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1306                 if (par_text.empty())
1307                         break;
1308                 docstring head;
1309                 par_text = split(par_text, head, ' ');
1310                 // Is it legal to use spaces in labels ?
1311                 if (i > 0)
1312                         text += '-';
1313                 text += head;
1314         }
1315
1316         // No need for a prefix if the user said so.
1317         if (lyxrc.label_init_length <= 0)
1318                 return text;
1319
1320         // Will contain the label type.
1321         docstring name;
1322
1323         // For section, subsection, etc...
1324         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1325                 Layout const * layout2 = &(pars_[pit - 1].layout());
1326                 if (layout2->latextype != LATEX_PARAGRAPH) {
1327                         --pit;
1328                         layout = layout2;
1329                 }
1330         }
1331         if (layout->latextype != LATEX_PARAGRAPH)
1332                 name = from_ascii(layout->latexname());
1333
1334         // for captions, we just take the caption type
1335         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
1336         if (caption_inset)
1337                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1338
1339         // If none of the above worked, we'll see if we're inside various
1340         // types of insets and take our abbreviation from them.
1341         if (name.empty()) {
1342                 InsetCode const codes[] = {
1343                         FLOAT_CODE,
1344                         WRAP_CODE,
1345                         FOOT_CODE
1346                 };
1347                 for (unsigned int i = 0; i < (sizeof codes / sizeof codes[0]); ++i) {
1348                         Inset * float_inset = cur.innerInsetOfType(codes[i]);
1349                         if (float_inset) {
1350                                 name = float_inset->name();
1351                                 break;
1352                         }
1353                 }
1354         }
1355
1356         // Create a correct prefix for prettyref
1357         if (name == "theorem")
1358                 name = from_ascii("thm");
1359         else if (name == "Foot")
1360                 name = from_ascii("fn");
1361         else if (name == "listing")
1362                 name = from_ascii("lst");
1363
1364         if (!name.empty())
1365                 text = name.substr(0, 3) + ':' + text;
1366
1367         return text;
1368 }
1369
1370
1371 void Text::charsTranspose(Cursor & cur)
1372 {
1373         BOOST_ASSERT(this == cur.text());
1374
1375         pos_type pos = cur.pos();
1376
1377         // If cursor is at beginning or end of paragraph, do nothing.
1378         if (pos == cur.lastpos() || pos == 0)
1379                 return;
1380
1381         Paragraph & par = cur.paragraph();
1382
1383         // Get the positions of the characters to be transposed.
1384         pos_type pos1 = pos - 1;
1385         pos_type pos2 = pos;
1386
1387         // In change tracking mode, ignore deleted characters.
1388         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1389                 ++pos2;
1390         if (pos2 == cur.lastpos())
1391                 return;
1392
1393         while (pos1 >= 0 && par.isDeleted(pos1))
1394                 --pos1;
1395         if (pos1 < 0)
1396                 return;
1397
1398         // Don't do anything if one of the "characters" is not regular text.
1399         if (par.isInset(pos1) || par.isInset(pos2))
1400                 return;
1401
1402         // Store the characters to be transposed (including font information).
1403         char_type char1 = par.getChar(pos1);
1404         Font const font1 =
1405                 par.getFontSettings(cur.buffer().params(), pos1);
1406
1407         char_type char2 = par.getChar(pos2);
1408         Font const font2 =
1409                 par.getFontSettings(cur.buffer().params(), pos2);
1410
1411         // And finally, we are ready to perform the transposition.
1412         // Track the changes if Change Tracking is enabled.
1413         bool const trackChanges = cur.buffer().params().trackChanges;
1414
1415         cur.recordUndo();
1416
1417         par.eraseChar(pos2, trackChanges);
1418         par.eraseChar(pos1, trackChanges);
1419         par.insertChar(pos1, char2, font2, trackChanges);
1420         par.insertChar(pos2, char1, font1, trackChanges);
1421
1422         cur.checkBufferStructure();
1423
1424         // After the transposition, move cursor to after the transposition.
1425         setCursor(cur, cur.pit(), pos2);
1426         cur.forwardPos();
1427 }
1428
1429
1430 DocIterator Text::macrocontextPosition() const
1431 {
1432         return macrocontext_position_;
1433 }
1434
1435
1436 void Text::setMacrocontextPosition(DocIterator const & pos)
1437 {
1438         macrocontext_position_ = pos;
1439 }
1440
1441
1442 docstring Text::previousWord(CursorSlice const & sl) const
1443 {
1444         CursorSlice from = sl;
1445         CursorSlice to = sl;
1446         getWord(from, to, PREVIOUS_WORD);
1447         if (sl == from || to == from)
1448                 return docstring();
1449
1450         Paragraph const & par = sl.paragraph();
1451         return par.asString(from.pos(), to.pos(), false);
1452 }
1453
1454
1455 bool Text::completionSupported(Cursor const & cur) const
1456 {
1457         Paragraph const & par = cur.paragraph();
1458         return cur.pos() > 0
1459                 && (cur.pos() >= par.size() || !par.isLetter(cur.pos()))
1460                 && par.isLetter(cur.pos() - 1);
1461 }
1462
1463
1464 CompletionList const * Text::createCompletionList(Cursor const & cur) const
1465 {
1466         return new TextCompletionList(cur);
1467 }
1468
1469
1470 bool Text::insertCompletion(Cursor & cur, docstring const & s, bool /*finished*/)
1471 {
1472         BOOST_ASSERT(cur.bv().cursor() == cur);
1473         cur.insert(s);
1474         cur.bv().cursor() = cur;
1475         if (!(cur.disp_.update() & Update::Force))
1476                 cur.updateFlags(cur.disp_.update() | Update::SinglePar);
1477         return true;
1478 }
1479
1480
1481 docstring Text::completionPrefix(Cursor const & cur) const
1482 {
1483         return previousWord(cur.top());
1484 }
1485
1486 } // namespace lyx