src/Text.cpp

   1 /**
   2  * \file src/text.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author Lars Gullik Bjønnes
   8  * \author Dov Feldstern
   9  * \author Jean-Marc Lasgouttes
  10  * \author John Levon
  11  * \author André Pönitz
  12  * \author Stefan Schimanski
  13  * \author Dekel Tsur
  14  * \author Jürgen Vigna
  15  *
  16  * Full author contact details are available in file CREDITS.
  17  */
  18
  19 #include <config.h>
  20
  21 #include "Text.h"
  22
  23 #include "Author.h"
  24 #include "Buffer.h"
  25 #include "buffer_funcs.h"
  26 #include "BufferParams.h"
  27 #include "BufferView.h"
  28 #include "Cursor.h"
  29 #include "ParIterator.h"
  30 #include "CutAndPaste.h"
  31 #include "debug.h"
  32 #include "DispatchResult.h"
  33 #include "Encoding.h"
  34 #include "ErrorList.h"
  35 #include "FuncRequest.h"
  36 #include "factory.h"
  37 #include "FontIterator.h"
  38 #include "gettext.h"
  39 #include "Language.h"
  40 #include "Color.h"
  41 #include "Length.h"
  42 #include "Lexer.h"
  43 #include "LyXRC.h"
  44 #include "Paragraph.h"
  45 #include "paragraph_funcs.h"
  46 #include "ParagraphParameters.h"
  47 #include "Undo.h"
  48 #include "VSpace.h"
  49 #include "WordLangTuple.h"
  50
  51 #include "frontends/FontMetrics.h"
  52 #include "frontends/Painter.h"
  53
  54 #include "insets/InsetText.h"
  55 #include "insets/InsetBibitem.h"
  56 #include "insets/InsetCaption.h"
  57 #include "insets/InsetHFill.h"
  58 #include "insets/InsetLine.h"
  59 #include "insets/InsetNewline.h"
  60 #include "insets/InsetPagebreak.h"
  61 #include "insets/InsetOptArg.h"
  62 #include "insets/InsetSpace.h"
  63 #include "insets/InsetSpecialChar.h"
  64 #include "insets/InsetTabular.h"
  65
  66 #include "support/lstrings.h"
  67 #include "support/textutils.h"
  68 #include "support/convert.h"
  69
  70 #include <boost/current_function.hpp>
  71 #include <boost/next_prior.hpp>
  72
  73 #include <sstream>
  74
  75 using std::auto_ptr;
  76 using std::advance;
  77 using std::distance;
  78 using std::max;
  79 using std::min;
  80 using std::endl;
  81 using std::string;
  82
  83 namespace lyx {
  84
  85 using support::bformat;
  86 using support::contains;
  87 using support::lowercase;
  88 using support::split;
  89 using support::uppercase;
  90
  91 using cap::cutSelection;
  92 using cap::pasteParagraphList;
  93
  94 using frontend::FontMetrics;
  95
  96 namespace {
  97
  98 void readParToken(Buffer const & buf, Paragraph & par, Lexer & lex,
  99         string const & token, Font & font, Change & change, ErrorList & errorList)
 100 {
 101         BufferParams const & bp = buf.params();
 102
 103         if (token[0] != '\\') {
 104 #if 0
 105                 string::const_iterator cit = token.begin();
 106                 for (; cit != token.end(); ++cit)
 107                         par.insertChar(par.size(), (*cit), font, change);
 108 #else
 109                 docstring dstr = lex.getDocString();
 110                 docstring::const_iterator cit = dstr.begin();
 111                 docstring::const_iterator cend = dstr.end();
 112                 for (; cit != cend; ++cit)
 113                         par.insertChar(par.size(), *cit, font, change);
 114 #endif
 115         } else if (token == "\\begin_layout") {
 116                 lex.eatLine();
 117                 docstring layoutname = lex.getDocString();
 118
 119                 font = Font(Font::ALL_INHERIT, bp.language);
 120                 change = Change(Change::UNCHANGED);
 121
 122                 TextClass const & tclass = bp.getTextClass();
 123
 124                 if (layoutname.empty()) {
 125                         layoutname = tclass.defaultLayoutName();
 126                 }
 127
 128                 bool hasLayout = tclass.hasLayout(layoutname);
 129
 130                 if (!hasLayout) {
 131                         errorList.push_back(ErrorItem(_("Unknown layout"),
 132                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 133                         layoutname, from_utf8(tclass.name())), par.id(), 0, par.size()));
 134                         layoutname = tclass.defaultLayoutName();
 135                 }
 136
 137                 par.layout(bp.getTextClass()[layoutname]);
 138
 139                 // Test whether the layout is obsolete.
 140                 LayoutPtr const & layout = par.layout();
 141                 if (!layout->obsoleted_by().empty())
 142                         par.layout(bp.getTextClass()[layout->obsoleted_by()]);
 143
 144                 par.params().read(lex);
 145
 146         } else if (token == "\\end_layout") {
 147                 lyxerr << BOOST_CURRENT_FUNCTION
 148                        << ": Solitary \\end_layout in line "
 149                        << lex.getLineNo() << "\n"
 150                        << "Missing \\begin_layout?.\n";
 151         } else if (token == "\\end_inset") {
 152                 lyxerr << BOOST_CURRENT_FUNCTION
 153                        << ": Solitary \\end_inset in line "
 154                        << lex.getLineNo() << "\n"
 155                        << "Missing \\begin_inset?.\n";
 156         } else if (token == "\\begin_inset") {
 157                 Inset * inset = readInset(lex, buf);
 158                 if (inset)
 159                         par.insertInset(par.size(), inset, font, change);
 160                 else {
 161                         lex.eatLine();
 162                         docstring line = lex.getDocString();
 163                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 164                                             par.id(), 0, par.size()));
 165                 }
 166         } else if (token == "\\family") {
 167                 lex.next();
 168                 font.setLyXFamily(lex.getString());
 169         } else if (token == "\\series") {
 170                 lex.next();
 171                 font.setLyXSeries(lex.getString());
 172         } else if (token == "\\shape") {
 173                 lex.next();
 174                 font.setLyXShape(lex.getString());
 175         } else if (token == "\\size") {
 176                 lex.next();
 177                 font.setLyXSize(lex.getString());
 178         } else if (token == "\\lang") {
 179                 lex.next();
 180                 string const tok = lex.getString();
 181                 Language const * lang = languages.getLanguage(tok);
 182                 if (lang) {
 183                         font.setLanguage(lang);
 184                 } else {
 185                         font.setLanguage(bp.language);
 186                         lex.printError("Unknown language `$$Token'");
 187                 }
 188         } else if (token == "\\numeric") {
 189                 lex.next();
 190                 font.setNumber(font.setLyXMisc(lex.getString()));
 191         } else if (token == "\\emph") {
 192                 lex.next();
 193                 font.setEmph(font.setLyXMisc(lex.getString()));
 194         } else if (token == "\\bar") {
 195                 lex.next();
 196                 string const tok = lex.getString();
 197
 198                 if (tok == "under")
 199                         font.setUnderbar(Font::ON);
 200                 else if (tok == "no")
 201                         font.setUnderbar(Font::OFF);
 202                 else if (tok == "default")
 203                         font.setUnderbar(Font::INHERIT);
 204                 else
 205                         lex.printError("Unknown bar font flag "
 206                                        "`$$Token'");
 207         } else if (token == "\\noun") {
 208                 lex.next();
 209                 font.setNoun(font.setLyXMisc(lex.getString()));
 210         } else if (token == "\\color") {
 211                 lex.next();
 212                 font.setLyXColor(lex.getString());
 213         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 214
 215                 // Insets don't make sense in a free-spacing context! ---Kayvan
 216                 if (par.isFreeSpacing()) {
 217                         if (token == "\\InsetSpace")
 218                                 par.insertChar(par.size(), ' ', font, change);
 219                         else if (lex.isOK()) {
 220                                 lex.next();
 221                                 string const next_token = lex.getString();
 222                                 if (next_token == "\\-")
 223                                         par.insertChar(par.size(), '-', font, change);
 224                                 else {
 225                                         lex.printError("Token `$$Token' "
 226                                                        "is in free space "
 227                                                        "paragraph layout!");
 228                                 }
 229                         }
 230                 } else {
 231                         auto_ptr<Inset> inset;
 232                         if (token == "\\SpecialChar" )
 233                                 inset.reset(new InsetSpecialChar);
 234                         else
 235                                 inset.reset(new InsetSpace);
 236                         inset->read(buf, lex);
 237                         par.insertInset(par.size(), inset.release(),
 238                                         font, change);
 239                 }
 240         } else if (token == "\\backslash") {
 241                 par.insertChar(par.size(), '\\', font, change);
 242         } else if (token == "\\newline") {
 243                 auto_ptr<Inset> inset(new InsetNewline);
 244                 inset->read(buf, lex);
 245                 par.insertInset(par.size(), inset.release(), font, change);
 246         } else if (token == "\\LyXTable") {
 247                 auto_ptr<Inset> inset(new InsetTabular(buf));
 248                 inset->read(buf, lex);
 249                 par.insertInset(par.size(), inset.release(), font, change);
 250         } else if (token == "\\hfill") {
 251                 par.insertInset(par.size(), new InsetHFill, font, change);
 252         } else if (token == "\\lyxline") {
 253                 par.insertInset(par.size(), new InsetLine, font, change);
 254         } else if (token == "\\newpage") {
 255                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 256         } else if (token == "\\clearpage") {
 257                 par.insertInset(par.size(), new InsetClearPage, font, change);
 258         } else if (token == "\\cleardoublepage") {
 259                 par.insertInset(par.size(), new InsetClearDoublePage, font, change);
 260         } else if (token == "\\change_unchanged") {
 261                 change = Change(Change::UNCHANGED);
 262         } else if (token == "\\change_inserted") {
 263                 lex.eatLine();
 264                 std::istringstream is(lex.getString());
 265                 unsigned int aid;
 266                 time_type ct;
 267                 is >> aid >> ct;
 268                 if (aid >= bp.author_map.size()) {
 269                         errorList.push_back(ErrorItem(_("Change tracking error"),
 270                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 271                                             par.id(), 0, par.size()));
 272                         change = Change(Change::UNCHANGED);
 273                 } else
 274                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 275         } else if (token == "\\change_deleted") {
 276                 lex.eatLine();
 277                 std::istringstream is(lex.getString());
 278                 unsigned int aid;
 279                 time_type ct;
 280                 is >> aid >> ct;
 281                 if (aid >= bp.author_map.size()) {
 282                         errorList.push_back(ErrorItem(_("Change tracking error"),
 283                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 284                                             par.id(), 0, par.size()));
 285                         change = Change(Change::UNCHANGED);
 286                 } else
 287                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 288         } else {
 289                 lex.eatLine();
 290                 errorList.push_back(ErrorItem(_("Unknown token"),
 291                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 292                         lex.getDocString()),
 293                         par.id(), 0, par.size()));
 294         }
 295 }
 296
 297
 298 void readParagraph(Buffer const & buf, Paragraph & par, Lexer & lex,
 299         ErrorList & errorList)
 300 {
 301         lex.nextToken();
 302         string token = lex.getString();
 303         Font font;
 304         Change change(Change::UNCHANGED);
 305
 306         while (lex.isOK()) {
 307                 readParToken(buf, par, lex, token, font, change, errorList);
 308
 309                 lex.nextToken();
 310                 token = lex.getString();
 311
 312                 if (token.empty())
 313                         continue;
 314
 315                 if (token == "\\end_layout") {
 316                         //Ok, paragraph finished
 317                         break;
 318                 }
 319
 320                 LYXERR(Debug::PARSER) << "Handling paragraph token: `"
 321                                       << token << '\'' << endl;
 322                 if (token == "\\begin_layout" || token == "\\end_document"
 323                     || token == "\\end_inset" || token == "\\begin_deeper"
 324                     || token == "\\end_deeper") {
 325                         lex.pushToken(token);
 326                         lyxerr << "Paragraph ended in line "
 327                                << lex.getLineNo() << "\n"
 328                                << "Missing \\end_layout.\n";
 329                         break;
 330                 }
 331         }
 332         // Final change goes to paragraph break:
 333         par.setChange(par.size(), change);
 334
 335         // Initialize begin_of_body_ on load; redoParagraph maintains
 336         par.setBeginOfBody();
 337 }
 338
 339
 340 } // namespace anon
 341
 342
 343 bool Text::empty() const
 344 {
 345         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 346                 // FIXME: Should we consider the labeled type as empty too?
 347                 && pars_[0].layout()->labeltype == LABEL_NO_LABEL);
 348 }
 349
 350
 351 double Text::spacing(Buffer const & buffer,
 352                 Paragraph const & par) const
 353 {
 354         if (par.params().spacing().isDefault())
 355                 return buffer.params().spacing().getValue();
 356         return par.params().spacing().getValue();
 357 }
 358
 359
 360 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 361 {
 362         BOOST_ASSERT(this == cur.text());
 363
 364         Paragraph & cpar = cur.paragraph();
 365         pit_type cpit = cur.pit();
 366
 367         TextClass const & tclass = cur.buffer().params().getTextClass();
 368         LayoutPtr const & layout = cpar.layout();
 369
 370         // this is only allowed, if the current paragraph is not empty
 371         // or caption and if it has not the keepempty flag active
 372         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 373             layout->labeltype != LABEL_SENSITIVE)
 374                 return;
 375
 376         // a layout change may affect also the following paragraph
 377         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 378
 379         // Always break behind a space
 380         // It is better to erase the space (Dekel)
 381         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 382                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
 383
 384         // What should the layout for the new paragraph be?
 385         bool keep_layout = inverse_logic ?
 386                 !layout->isEnvironment()
 387                 : layout->isEnvironment();
 388
 389         // We need to remember this before we break the paragraph, because
 390         // that invalidates the layout variable
 391         bool sensitive = layout->labeltype == LABEL_SENSITIVE;
 392
 393         // we need to set this before we insert the paragraph.
 394         bool const isempty = cpar.allowEmpty() && cpar.empty();
 395
 396         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
 397                          cur.pos(), keep_layout);
 398
 399         // After this, neither paragraph contains any rows!
 400
 401         cpit = cur.pit();
 402         pit_type next_par = cpit + 1;
 403
 404         // well this is the caption hack since one caption is really enough
 405         if (sensitive) {
 406                 if (cur.pos() == 0)
 407                         // set to standard-layout
 408                         pars_[cpit].applyLayout(tclass.defaultLayout());
 409                 else
 410                         // set to standard-layout
 411                         pars_[next_par].applyLayout(tclass.defaultLayout());
 412         }
 413
 414         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 415                 if (!pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges))
 416                         break; // the character couldn't be deleted physically due to change tracking
 417         }
 418
 419         updateLabels(cur.buffer());
 420
 421         // A singlePar update is not enough in this case.
 422         cur.updateFlags(Update::Force);
 423
 424         // This check is necessary. Otherwise the new empty paragraph will
 425         // be deleted automatically. And it is more friendly for the user!
 426         if (cur.pos() != 0 || isempty)
 427                 setCursor(cur, cur.pit() + 1, 0);
 428         else
 429                 setCursor(cur, cur.pit(), 0);
 430 }
 431
 432
 433 // insert a character, moves all the following breaks in the
 434 // same Paragraph one to the right and make a rebreak
 435 void Text::insertChar(Cursor & cur, char_type c)
 436 {
 437         BOOST_ASSERT(this == cur.text());
 438         BOOST_ASSERT(c != Paragraph::META_INSET);
 439
 440         recordUndo(cur, Undo::INSERT);
 441
 442         TextMetrics const & tm = cur.bv().textMetrics(this);
 443         Buffer const & buffer = cur.buffer();
 444         Paragraph & par = cur.paragraph();
 445         // try to remove this
 446         pit_type const pit = cur.pit();
 447
 448         bool const freeSpacing = par.layout()->free_spacing ||
 449                 par.isFreeSpacing();
 450
 451         if (lyxrc.auto_number) {
 452                 static docstring const number_operators = from_ascii("+-/*");
 453                 static docstring const number_unary_operators = from_ascii("+-");
 454                 static docstring const number_seperators = from_ascii(".,:");
 455
 456                 if (cur.current_font.number() == Font::ON) {
 457                         if (!isDigit(c) && !contains(number_operators, c) &&
 458                             !(contains(number_seperators, c) &&
 459                               cur.pos() != 0 &&
 460                               cur.pos() != cur.lastpos() &&
 461                               tm.getDisplayFont(pit, cur.pos()).number() == Font::ON &&
 462                               tm.getDisplayFont(pit, cur.pos() - 1).number() == Font::ON)
 463                            )
 464                                 number(cur); // Set current_font.number to OFF
 465                 } else if (isDigit(c) &&
 466                            cur.real_current_font.isVisibleRightToLeft()) {
 467                         number(cur); // Set current_font.number to ON
 468
 469                         if (cur.pos() != 0) {
 470                                 char_type const c = par.getChar(cur.pos() - 1);
 471                                 if (contains(number_unary_operators, c) &&
 472                                     (cur.pos() == 1
 473                                      || par.isSeparator(cur.pos() - 2)
 474                                      || par.isNewline(cur.pos() - 2))
 475                                   ) {
 476                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 477                                                 tm.font_);
 478                                 } else if (contains(number_seperators, c)
 479                                      && cur.pos() >= 2
 480                                      && tm.getDisplayFont(pit, cur.pos() - 2).number() == Font::ON) {
 481                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 482                                                 tm.font_);
 483                                 }
 484                         }
 485                 }
 486         }
 487
 488         // In Bidi text, we want spaces to be treated in a special way: spaces
 489         // which are between words in different languages should get the
 490         // paragraph's language; otherwise, spaces should keep the language
 491         // they were originally typed in. This is only in effect while typing;
 492         // after the text is already typed in, the user can always go back and
 493         // explicitly set the language of a space as desired. But 99.9% of the
 494         // time, what we're doing here is what the user actually meant.
 495         //
 496         // The following cases are the ones in which the language of the space
 497         // should be changed to match that of the containing paragraph. In the
 498         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 499         // represents a space, pipe (|) represents the cursor position (so the
 500         // character before it is the one just typed in). The different cases
 501         // are depicted logically (not visually), from left to right:
 502         //
 503         // 1. A_a|
 504         // 2. a_A|
 505         //
 506         // Theoretically, there are other situations that we should, perhaps, deal
 507         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 508         // point (to understand why, just try to create this situation...).
 509
 510         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 511                 // get font in front and behind the space in question. But do NOT
 512                 // use getFont(cur.pos()) because the character c is not inserted yet
 513                 Font const & pre_space_font  = tm.getDisplayFont(cur.pit(), cur.pos() - 2);
 514                 Font const & post_space_font = cur.real_current_font;
 515                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 516                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 517
 518                 if (pre_space_rtl != post_space_rtl) {
 519                         // Set the space's language to match the language of the
 520                         // adjacent character whose direction is the paragraph's
 521                         // direction; don't touch other properties of the font
 522                         Language const * lang =
 523                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 524                                 pre_space_font.language() : post_space_font.language();
 525
 526                         Font space_font = tm.getDisplayFont(cur.pit(), cur.pos() - 1);
 527                         space_font.setLanguage(lang);
 528                         par.setFont(cur.pos() - 1, space_font);
 529                 }
 530         }
 531
 532         // Next check, if there will be two blanks together or a blank at
 533         // the beginning of a paragraph.
 534         // I decided to handle blanks like normal characters, the main
 535         // difference are the special checks when calculating the row.fill
 536         // (blank does not count at the end of a row) and the check here
 537
 538         // When the free-spacing option is set for the current layout,
 539         // disable the double-space checking
 540         if (!freeSpacing && isLineSeparatorChar(c)) {
 541                 if (cur.pos() == 0) {
 542                         static bool sent_space_message = false;
 543                         if (!sent_space_message) {
 544                                 cur.message(_("You cannot insert a space at the "
 545                                                            "beginning of a paragraph. Please read the Tutorial."));
 546                                 sent_space_message = true;
 547                         }
 548                         return;
 549                 }
 550                 BOOST_ASSERT(cur.pos() > 0);
 551                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 552                     && !par.isDeleted(cur.pos() - 1)) {
 553                         static bool sent_space_message = false;
 554                         if (!sent_space_message) {
 555                                 cur.message(_("You cannot type two spaces this way. "
 556                                                            "Please read the Tutorial."));
 557                                 sent_space_message = true;
 558                         }
 559                         return;
 560                 }
 561         }
 562
 563         par.insertChar(cur.pos(), c, cur.current_font, cur.buffer().params().trackChanges);
 564         checkBufferStructure(cur.buffer(), cur);
 565
 566 //              cur.updateFlags(Update::Force);
 567         setCursor(cur.top(), cur.pit(), cur.pos() + 1);
 568         charInserted();
 569 }
 570
 571
 572 void Text::charInserted()
 573 {
 574         // Here we call finishUndo for every 20 characters inserted.
 575         // This is from my experience how emacs does it. (Lgb)
 576         static unsigned int counter;
 577         if (counter < 20) {
 578                 ++counter;
 579         } else {
 580                 finishUndo();
 581                 counter = 0;
 582         }
 583 }
 584
 585
 586 // the cursor set functions have a special mechanism. When they
 587 // realize, that you left an empty paragraph, they will delete it.
 588
 589 bool Text::cursorRightOneWord(Cursor & cur)
 590 {
 591         BOOST_ASSERT(this == cur.text());
 592
 593         Cursor old = cur;
 594
 595         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
 596                 ++old.pit();
 597                 old.pos() = 0;
 598         } else {
 599                 // Advance through word.
 600                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
 601                         ++old.pos();
 602                 // Skip through trailing nonword stuff.
 603                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
 604                         ++old.pos();
 605         }
 606         return setCursor(cur, old.pit(), old.pos());
 607 }
 608
 609
 610 bool Text::cursorLeftOneWord(Cursor & cur)
 611 {
 612         BOOST_ASSERT(this == cur.text());
 613
 614         Cursor old = cur;
 615
 616         if (old.pos() == 0 && old.pit() != 0) {
 617                 --old.pit();
 618                 old.pos() = old.lastpos();
 619         } else {
 620                 // Skip through initial nonword stuff.
 621                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
 622                         --old.pos();
 623                 // Advance through word.
 624                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
 625                         --old.pos();
 626         }
 627         return setCursor(cur, old.pit(), old.pos());
 628 }
 629
 630
 631 void Text::selectWord(Cursor & cur, word_location loc)
 632 {
 633         BOOST_ASSERT(this == cur.text());
 634         CursorSlice from = cur.top();
 635         CursorSlice to = cur.top();
 636         getWord(from, to, loc);
 637         if (cur.top() != from)
 638                 setCursor(cur, from.pit(), from.pos());
 639         if (to == from)
 640                 return;
 641         cur.resetAnchor();
 642         setCursor(cur, to.pit(), to.pos());
 643         cur.setSelection();
 644 }
 645
 646
 647 // Select the word currently under the cursor when no
 648 // selection is currently set
 649 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
 650 {
 651         BOOST_ASSERT(this == cur.text());
 652         if (cur.selection())
 653                 return false;
 654         selectWord(cur, loc);
 655         return cur.selection();
 656 }
 657
 658
 659 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
 660 {
 661         BOOST_ASSERT(this == cur.text());
 662
 663         if (!cur.selection())
 664                 return;
 665
 666         recordUndoSelection(cur, Undo::ATOMIC);
 667
 668         pit_type begPit = cur.selectionBegin().pit();
 669         pit_type endPit = cur.selectionEnd().pit();
 670
 671         pos_type begPos = cur.selectionBegin().pos();
 672         pos_type endPos = cur.selectionEnd().pos();
 673
 674         // keep selection info, because endPos becomes invalid after the first loop
 675         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
 676
 677         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
 678
 679         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 680                 pos_type parSize = pars_[pit].size();
 681
 682                 // ignore empty paragraphs; otherwise, an assertion will fail for
 683                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
 684                 if (parSize == 0)
 685                         continue;
 686
 687                 // do not consider first paragraph if the cursor starts at pos size()
 688                 if (pit == begPit && begPos == parSize)
 689                         continue;
 690
 691                 // do not consider last paragraph if the cursor ends at pos 0
 692                 if (pit == endPit && endPos == 0)
 693                         break; // last iteration anyway
 694
 695                 pos_type left  = (pit == begPit ? begPos : 0);
 696                 pos_type right = (pit == endPit ? endPos : parSize);
 697
 698                 if (op == ACCEPT) {
 699                         pars_[pit].acceptChanges(cur.buffer().params(), left, right);
 700                 } else {
 701                         pars_[pit].rejectChanges(cur.buffer().params(), left, right);
 702                 }
 703         }
 704
 705         // next, accept/reject imaginary end-of-par characters
 706
 707         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 708                 pos_type pos = pars_[pit].size();
 709
 710                 // skip if the selection ends before the end-of-par
 711                 if (pit == endPit && endsBeforeEndOfPar)
 712                         break; // last iteration anyway
 713
 714                 // skip if this is not the last paragraph of the document
 715                 // note: the user should be able to accept/reject the par break of the last par!
 716                 if (pit == endPit && pit + 1 != int(pars_.size()))
 717                         break; // last iteration anway
 718
 719                 if (op == ACCEPT) {
 720                         if (pars_[pit].isInserted(pos)) {
 721                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 722                         } else if (pars_[pit].isDeleted(pos)) {
 723                                 if (pit + 1 == int(pars_.size())) {
 724                                         // we cannot remove a par break at the end of the last paragraph;
 725                                         // instead, we mark it unchanged
 726                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 727                                 } else {
 728                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 729                                         --endPit;
 730                                         --pit;
 731                                 }
 732                         }
 733                 } else {
 734                         if (pars_[pit].isDeleted(pos)) {
 735                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 736                         } else if (pars_[pit].isInserted(pos)) {
 737                                 if (pit + 1 == int(pars_.size())) {
 738                                         // we mark the par break at the end of the last paragraph unchanged
 739                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 740                                 } else {
 741                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 742                                         --endPit;
 743                                         --pit;
 744                                 }
 745                         }
 746                 }
 747         }
 748
 749         // finally, invoke the DEPM
 750
 751         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer().params().trackChanges);
 752
 753         //
 754
 755         finishUndo();
 756         cur.clearSelection();
 757         setCursorIntern(cur, begPit, begPos);
 758         cur.updateFlags(Update::Force);
 759         updateLabels(cur.buffer());
 760 }
 761
 762
 763 void Text::acceptChanges(BufferParams const & bparams)
 764 {
 765         lyx::acceptChanges(pars_, bparams);
 766         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
 767 }
 768
 769
 770 void Text::rejectChanges(BufferParams const & bparams)
 771 {
 772         pit_type pars_size = static_cast<pit_type>(pars_.size());
 773
 774         // first, reject changes within each individual paragraph
 775         // (do not consider end-of-par)
 776         for (pit_type pit = 0; pit < pars_size; ++pit) {
 777                 if (!pars_[pit].empty())   // prevent assertion failure
 778                         pars_[pit].rejectChanges(bparams, 0, pars_[pit].size());
 779         }
 780
 781         // next, reject imaginary end-of-par characters
 782         for (pit_type pit = 0; pit < pars_size; ++pit) {
 783                 pos_type pos = pars_[pit].size();
 784
 785                 if (pars_[pit].isDeleted(pos)) {
 786                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 787                 } else if (pars_[pit].isInserted(pos)) {
 788                         if (pit == pars_size - 1) {
 789                                 // we mark the par break at the end of the last
 790                                 // paragraph unchanged
 791                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 792                         } else {
 793                                 mergeParagraph(bparams, pars_, pit);
 794                                 --pit;
 795                                 --pars_size;
 796                         }
 797                 }
 798         }
 799
 800         // finally, invoke the DEPM
 801         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
 802 }
 803
 804
 805 void Text::deleteWordForward(Cursor & cur)
 806 {
 807         BOOST_ASSERT(this == cur.text());
 808         if (cur.lastpos() == 0)
 809                 cursorRight(cur);
 810         else {
 811                 cur.resetAnchor();
 812                 cur.selection() = true;
 813                 cursorRightOneWord(cur);
 814                 cur.setSelection();
 815                 cutSelection(cur, true, false);
 816                 checkBufferStructure(cur.buffer(), cur);
 817         }
 818 }
 819
 820
 821 void Text::deleteWordBackward(Cursor & cur)
 822 {
 823         BOOST_ASSERT(this == cur.text());
 824         if (cur.lastpos() == 0)
 825                 cursorLeft(cur);
 826         else {
 827                 cur.resetAnchor();
 828                 cur.selection() = true;
 829                 cursorLeftOneWord(cur);
 830                 cur.setSelection();
 831                 cutSelection(cur, true, false);
 832                 checkBufferStructure(cur.buffer(), cur);
 833         }
 834 }
 835
 836
 837 // Kill to end of line.
 838 void Text::changeCase(Cursor & cur, Text::TextCase action)
 839 {
 840         BOOST_ASSERT(this == cur.text());
 841         CursorSlice from;
 842         CursorSlice to;
 843
 844         if (cur.selection()) {
 845                 from = cur.selBegin();
 846                 to = cur.selEnd();
 847         } else {
 848                 from = cur.top();
 849                 getWord(from, to, PARTIAL_WORD);
 850                 cursorRightOneWord(cur);
 851         }
 852
 853         recordUndoSelection(cur, Undo::ATOMIC);
 854
 855         pit_type begPit = from.pit();
 856         pit_type endPit = to.pit();
 857
 858         pos_type begPos = from.pos();
 859         pos_type endPos = to.pos();
 860
 861         bool const trackChanges = cur.buffer().params().trackChanges;
 862
 863         pos_type right = 0; // needed after the for loop
 864
 865         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 866                 pos_type parSize = pars_[pit].size();
 867
 868                 pos_type pos = (pit == begPit ? begPos : 0);
 869                 right = (pit == endPit ? endPos : parSize);
 870
 871                 // process sequences of modified characters; in change
 872                 // tracking mode, this approach results in much better
 873                 // usability than changing case on a char-by-char basis
 874                 docstring changes;
 875
 876                 bool capitalize = true;
 877
 878                 for (; pos < right; ++pos) {
 879                         char_type oldChar = pars_[pit].getChar(pos);
 880                         char_type newChar = oldChar;
 881
 882                         // ignore insets and don't play with deleted text!
 883                         if (oldChar != Paragraph::META_INSET && !pars_[pit].isDeleted(pos)) {
 884                                 switch (action) {
 885                                 case text_lowercase:
 886                                         newChar = lowercase(oldChar);
 887                                         break;
 888                                 case text_capitalization:
 889                                         if (capitalize) {
 890                                                 newChar = uppercase(oldChar);
 891                                                 capitalize = false;
 892                                         }
 893                                         break;
 894                                 case text_uppercase:
 895                                         newChar = uppercase(oldChar);
 896                                         break;
 897                                 }
 898                         }
 899
 900                         if (!pars_[pit].isLetter(pos) || pars_[pit].isDeleted(pos)) {
 901                                 capitalize = true; // permit capitalization again
 902                         }
 903
 904                         if (oldChar != newChar) {
 905                                 changes += newChar;
 906                         }
 907
 908                         if (oldChar == newChar || pos == right - 1) {
 909                                 if (oldChar != newChar) {
 910                                         pos++; // step behind the changing area
 911                                 }
 912                                 int erasePos = pos - changes.size();
 913                                 for (size_t i = 0; i < changes.size(); i++) {
 914                                         pars_[pit].insertChar(pos, changes[i],
 915                                                 pars_[pit].getFontSettings(cur.buffer().params(),
 916                                                                 erasePos),
 917                                                 trackChanges);
 918                                         if (!pars_[pit].eraseChar(erasePos, trackChanges)) {
 919                                                 ++erasePos;
 920                                                 ++pos; // advance
 921                                                 ++right; // expand selection
 922                                         }
 923                                 }
 924                                 changes.clear();
 925                         }
 926                 }
 927         }
 928
 929         // the selection may have changed due to logically-only deleted chars
 930         setCursor(cur, begPit, begPos);
 931         cur.resetAnchor();
 932         setCursor(cur, endPit, right);
 933         cur.setSelection();
 934
 935         checkBufferStructure(cur.buffer(), cur);
 936 }
 937
 938
 939 bool Text::handleBibitems(Cursor & cur)
 940 {
 941         if (cur.paragraph().layout()->labeltype != LABEL_BIBLIO)
 942                 return false;
 943         // if a bibitem is deleted, merge with previous paragraph
 944         // if this is a bibliography item as well
 945         if (cur.pos() == 0) {
 946                 BufferParams const & bufparams = cur.buffer().params();
 947                 Paragraph const & par = cur.paragraph();
 948                 Cursor prevcur = cur;
 949                 if (cur.pit() > 0) {
 950                         --prevcur.pit();
 951                         prevcur.pos() = prevcur.lastpos();
 952                 }
 953                 Paragraph const & prevpar = prevcur.paragraph();
 954                 if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
 955                         recordUndo(cur, Undo::ATOMIC, prevcur.pit());
 956                         mergeParagraph(bufparams, cur.text()->paragraphs(),
 957                                        prevcur.pit());
 958                         updateLabels(cur.buffer());
 959                         setCursorIntern(cur, prevcur.pit(), prevcur.pos());
 960                         cur.updateFlags(Update::Force);
 961                 // if not, reset the paragraph to default
 962                 } else
 963                         cur.paragraph().layout(
 964                                 bufparams.getTextClass().defaultLayout());
 965                 return true;
 966         }
 967         return false;
 968 }
 969
 970
 971 bool Text::erase(Cursor & cur)
 972 {
 973         BOOST_ASSERT(this == cur.text());
 974         bool needsUpdate = false;
 975         Paragraph & par = cur.paragraph();
 976
 977         if (cur.pos() != cur.lastpos()) {
 978                 // this is the code for a normal delete, not pasting
 979                 // any paragraphs
 980                 recordUndo(cur, Undo::DELETE);
 981                 if(!par.eraseChar(cur.pos(), cur.buffer().params().trackChanges)) {
 982                         // the character has been logically deleted only => skip it
 983                         cur.top().forwardPos();
 984                 }
 985                 checkBufferStructure(cur.buffer(), cur);
 986                 needsUpdate = true;
 987         } else {
 988                 if (cur.pit() == cur.lastpit())
 989                         return dissolveInset(cur);
 990
 991                 if (!par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
 992                         par.setChange(cur.pos(), Change(Change::DELETED));
 993                         cur.forwardPos();
 994                         needsUpdate = true;
 995                 } else {
 996                         setCursorIntern(cur, cur.pit() + 1, 0);
 997                         needsUpdate = backspacePos0(cur);
 998                 }
 999         }
1000
1001         needsUpdate |= handleBibitems(cur);
1002
1003         if (needsUpdate) {
1004                 // Make sure the cursor is correct. Is this really needed?
1005                 // No, not really... at least not here!
1006                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
1007                 checkBufferStructure(cur.buffer(), cur);
1008         }
1009
1010         return needsUpdate;
1011 }
1012
1013
1014 bool Text::backspacePos0(Cursor & cur)
1015 {
1016         BOOST_ASSERT(this == cur.text());
1017         if (cur.pit() == 0)
1018                 return false;
1019
1020         bool needsUpdate = false;
1021
1022         BufferParams const & bufparams = cur.buffer().params();
1023         TextClass const & tclass = bufparams.getTextClass();
1024         ParagraphList & plist = cur.text()->paragraphs();
1025         Paragraph const & par = cur.paragraph();
1026         Cursor prevcur = cur;
1027         --prevcur.pit();
1028         prevcur.pos() = prevcur.lastpos();
1029         Paragraph const & prevpar = prevcur.paragraph();
1030
1031         // is it an empty paragraph?
1032         if (cur.lastpos() == 0
1033             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1034                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1035                 plist.erase(boost::next(plist.begin(), cur.pit()));
1036                 needsUpdate = true;
1037         }
1038         // is previous par empty?
1039         else if (prevcur.lastpos() == 0
1040                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1041                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1042                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1043                 needsUpdate = true;
1044         }
1045         // Pasting is not allowed, if the paragraphs have different
1046         // layouts. I think it is a real bug of all other
1047         // word processors to allow it. It confuses the user.
1048         // Correction: Pasting is always allowed with standard-layout
1049         else if (par.layout() == prevpar.layout()
1050                  || par.layout() == tclass.defaultLayout()) {
1051                 recordUndo(cur, Undo::ATOMIC, prevcur.pit());
1052                 mergeParagraph(bufparams, plist, prevcur.pit());
1053                 needsUpdate = true;
1054         }
1055
1056         if (needsUpdate) {
1057                 updateLabels(cur.buffer());
1058                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1059         }
1060
1061         return needsUpdate;
1062 }
1063
1064
1065 bool Text::backspace(Cursor & cur)
1066 {
1067         BOOST_ASSERT(this == cur.text());
1068         bool needsUpdate = false;
1069         if (cur.pos() == 0) {
1070                 if (cur.pit() == 0)
1071                         return dissolveInset(cur);
1072
1073                 Paragraph & prev_par = pars_[cur.pit() - 1];
1074
1075                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1076                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1077                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1078                         return true;
1079                 }
1080                 // The cursor is at the beginning of a paragraph, so
1081                 // the backspace will collapse two paragraphs into one.
1082                 needsUpdate = backspacePos0(cur);
1083
1084         } else {
1085                 // this is the code for a normal backspace, not pasting
1086                 // any paragraphs
1087                 recordUndo(cur, Undo::DELETE);
1088                 // We used to do cursorLeftIntern() here, but it is
1089                 // not a good idea since it triggers the auto-delete
1090                 // mechanism. So we do a cursorLeftIntern()-lite,
1091                 // without the dreaded mechanism. (JMarc)
1092                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1093                                 false, cur.boundary());
1094                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1095                 checkBufferStructure(cur.buffer(), cur);
1096         }
1097
1098         if (cur.pos() == cur.lastpos())
1099                 cur.setCurrentFont();
1100
1101         needsUpdate |= handleBibitems(cur);
1102
1103         // A singlePar update is not enough in this case.
1104 //              cur.updateFlags(Update::Force);
1105         setCursor(cur.top(), cur.pit(), cur.pos());
1106
1107         return needsUpdate;
1108 }
1109
1110
1111 bool Text::dissolveInset(Cursor & cur) {
1112         BOOST_ASSERT(this == cur.text());
1113
1114         if (isMainText(cur.bv().buffer()) || cur.inset().nargs() != 1)
1115                 return false;
1116
1117         recordUndoInset(cur);
1118         cur.selHandle(false);
1119         // save position
1120         pos_type spos = cur.pos();
1121         pit_type spit = cur.pit();
1122         ParagraphList plist;
1123         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1124                 plist = paragraphs();
1125         cur.popLeft();
1126         // store cursor offset
1127         if (spit == 0)
1128                 spos += cur.pos();
1129         spit += cur.pit();
1130         Buffer & b = cur.buffer();
1131         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1132         if (!plist.empty()) {
1133                 // ERT paragraphs have the Language latex_language.
1134                 // This is invalid outside of ERT, so we need to
1135                 // change it to the buffer language.
1136                 ParagraphList::iterator it = plist.begin();
1137                 ParagraphList::iterator it_end = plist.end();
1138                 for (; it != it_end; it++) {
1139                         it->changeLanguage(b.params(), latex_language,
1140                                         b.getLanguage());
1141                 }
1142
1143                 pasteParagraphList(cur, plist, b.params().getTextClassPtr(),
1144                                    b.errorList("Paste"));
1145                 // restore position
1146                 cur.pit() = std::min(cur.lastpit(), spit);
1147                 cur.pos() = std::min(cur.lastpos(), spos);
1148         }
1149         cur.clearSelection();
1150         cur.resetAnchor();
1151         return true;
1152 }
1153
1154
1155 void Text::getWord(CursorSlice & from, CursorSlice & to,
1156         word_location const loc)
1157 {
1158         Paragraph const & from_par = pars_[from.pit()];
1159         switch (loc) {
1160         case WHOLE_WORD_STRICT:
1161                 if (from.pos() == 0 || from.pos() == from_par.size()
1162                     || !from_par.isLetter(from.pos())
1163                     || !from_par.isLetter(from.pos() - 1)) {
1164                         to = from;
1165                         return;
1166                 }
1167                 // no break here, we go to the next
1168
1169         case WHOLE_WORD:
1170                 // If we are already at the beginning of a word, do nothing
1171                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1172                         break;
1173                 // no break here, we go to the next
1174
1175         case PREVIOUS_WORD:
1176                 // always move the cursor to the beginning of previous word
1177                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1178                         --from.pos();
1179                 break;
1180         case NEXT_WORD:
1181                 lyxerr << "Text::getWord: NEXT_WORD not implemented yet"
1182                        << endl;
1183                 break;
1184         case PARTIAL_WORD:
1185                 // no need to move the 'from' cursor
1186                 break;
1187         }
1188         to = from;
1189         Paragraph & to_par = pars_[to.pit()];
1190         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1191                 ++to.pos();
1192 }
1193
1194
1195 void Text::write(Buffer const & buf, std::ostream & os) const
1196 {
1197         ParagraphList::const_iterator pit = paragraphs().begin();
1198         ParagraphList::const_iterator end = paragraphs().end();
1199         depth_type dth = 0;
1200         for (; pit != end; ++pit)
1201                 pit->write(buf, os, buf.params(), dth);
1202
1203         // Close begin_deeper
1204         for(; dth > 0; --dth)
1205                 os << "\n\\end_deeper";
1206 }
1207
1208
1209 bool Text::read(Buffer const & buf, Lexer & lex, ErrorList & errorList)
1210 {
1211         depth_type depth = 0;
1212
1213         while (lex.isOK()) {
1214                 lex.nextToken();
1215                 string const token = lex.getString();
1216
1217                 if (token.empty())
1218                         continue;
1219
1220                 if (token == "\\end_inset")
1221                         break;
1222
1223                 if (token == "\\end_body")
1224                         continue;
1225
1226                 if (token == "\\begin_body")
1227                         continue;
1228
1229                 if (token == "\\end_document")
1230                         return false;
1231
1232                 if (token == "\\begin_layout") {
1233                         lex.pushToken(token);
1234
1235                         Paragraph par;
1236                         par.params().depth(depth);
1237                         par.setFont(0, Font(Font::ALL_INHERIT, buf.params().language));
1238                         pars_.push_back(par);
1239
1240                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1241                         // not BufferParams
1242                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
1243
1244                 } else if (token == "\\begin_deeper") {
1245                         ++depth;
1246                 } else if (token == "\\end_deeper") {
1247                         if (!depth) {
1248                                 lex.printError("\\end_deeper: " "depth is already null");
1249                         } else {
1250                                 --depth;
1251                         }
1252                 } else {
1253                         lyxerr << "Handling unknown body token: `"
1254                                << token << '\'' << endl;
1255                 }
1256         }
1257         return true;
1258 }
1259
1260 // Returns the current font and depth as a message.
1261 docstring Text::currentState(Cursor & cur)
1262 {
1263         BOOST_ASSERT(this == cur.text());
1264         Buffer & buf = cur.buffer();
1265         Paragraph const & par = cur.paragraph();
1266         odocstringstream os;
1267
1268         if (buf.params().trackChanges)
1269                 os << _("[Change Tracking] ");
1270
1271         Change change = par.lookupChange(cur.pos());
1272
1273         if (change.type != Change::UNCHANGED) {
1274                 Author const & a = buf.params().authors().get(change.author);
1275                 os << _("Change: ") << a.name();
1276                 if (!a.email().empty())
1277                         os << " (" << a.email() << ")";
1278                 // FIXME ctime is english, we should translate that
1279                 os << _(" at ") << ctime(&change.changetime);
1280                 os << " : ";
1281         }
1282
1283         // I think we should only show changes from the default
1284         // font. (Asger)
1285         // No, from the document font (MV)
1286         Font font = cur.real_current_font;
1287         font.reduce(buf.params().getFont());
1288
1289         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1290
1291         // The paragraph depth
1292         int depth = cur.paragraph().getDepth();
1293         if (depth > 0)
1294                 os << bformat(_(", Depth: %1$d"), depth);
1295
1296         // The paragraph spacing, but only if different from
1297         // buffer spacing.
1298         Spacing const & spacing = par.params().spacing();
1299         if (!spacing.isDefault()) {
1300                 os << _(", Spacing: ");
1301                 switch (spacing.getSpace()) {
1302                 case Spacing::Single:
1303                         os << _("Single");
1304                         break;
1305                 case Spacing::Onehalf:
1306                         os << _("OneHalf");
1307                         break;
1308                 case Spacing::Double:
1309                         os << _("Double");
1310                         break;
1311                 case Spacing::Other:
1312                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1313                         break;
1314                 case Spacing::Default:
1315                         // should never happen, do nothing
1316                         break;
1317                 }
1318         }
1319
1320 #ifdef DEVEL_VERSION
1321         os << _(", Inset: ") << &cur.inset();
1322         os << _(", Paragraph: ") << cur.pit();
1323         os << _(", Id: ") << par.id();
1324         os << _(", Position: ") << cur.pos();
1325         // FIXME: Why is the check for par.size() needed?
1326         // We are called with cur.pos() == par.size() quite often.
1327         if (!par.empty() && cur.pos() < par.size()) {
1328                 // Force output of code point, not character
1329                 size_t const c = par.getChar(cur.pos());
1330                 os << _(", Char: 0x") << std::hex << c;
1331         }
1332         os << _(", Boundary: ") << cur.boundary();
1333 //      Row & row = cur.textRow();
1334 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1335 #endif
1336         return os.str();
1337 }
1338
1339
1340 docstring Text::getPossibleLabel(Cursor & cur) const
1341 {
1342         pit_type pit = cur.pit();
1343
1344         LayoutPtr layout = pars_[pit].layout();
1345
1346         docstring text;
1347         docstring par_text = pars_[pit].asString(cur.buffer(), false);
1348         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1349                 if (par_text.empty())
1350                         break;
1351                 docstring head;
1352                 par_text = split(par_text, head, ' ');
1353                 // Is it legal to use spaces in labels ?
1354                 if (i > 0)
1355                         text += '-';
1356                 text += head;
1357         }
1358
1359         // No need for a prefix if the user said so.
1360         if (lyxrc.label_init_length <= 0)
1361                 return text;
1362
1363         // Will contain the label type.
1364         docstring name;
1365
1366         // For section, subsection, etc...
1367         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1368                 LayoutPtr const & layout2 = pars_[pit - 1].layout();
1369                 if (layout2->latextype != LATEX_PARAGRAPH) {
1370                         --pit;
1371                         layout = layout2;
1372                 }
1373         }
1374         if (layout->latextype != LATEX_PARAGRAPH)
1375                 name = from_ascii(layout->latexname());
1376
1377         // for captions, we just take the caption type
1378         Inset * caption_inset = cur.innerInsetOfType(Inset::CAPTION_CODE);
1379         if (caption_inset)
1380                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1381
1382         // If none of the above worked, we'll see if we're inside various
1383         // types of insets and take our abbreviation from them.
1384         if (name.empty()) {
1385                 Inset::Code const codes[] = {
1386                         Inset::FLOAT_CODE,
1387                         Inset::WRAP_CODE,
1388                         Inset::FOOT_CODE
1389                 };
1390                 for (unsigned int i = 0; i < (sizeof codes / sizeof codes[0]); ++i) {
1391                         Inset * float_inset = cur.innerInsetOfType(codes[i]);
1392                         if (float_inset) {
1393                                 name = float_inset->name();
1394                                 break;
1395                         }
1396                 }
1397         }
1398
1399         // Create a correct prefix for prettyref
1400         if (name == "theorem")
1401                 name = from_ascii("thm");
1402         else if (name == "Foot")
1403                 name = from_ascii("fn");
1404         else if (name == "listing")
1405                 name = from_ascii("lst");
1406
1407         if (!name.empty())
1408                 text = name.substr(0, 3) + ':' + text;
1409
1410         return text;
1411 }
1412
1413
1414 void Text::charsTranspose(Cursor & cur)
1415 {
1416         BOOST_ASSERT(this == cur.text());
1417
1418         pos_type pos = cur.pos();
1419
1420         // If cursor is at beginning or end of paragraph, do nothing.
1421         if (pos == cur.lastpos() || pos == 0)
1422                 return;
1423
1424         Paragraph & par = cur.paragraph();
1425
1426         // Get the positions of the characters to be transposed.
1427         pos_type pos1 = pos - 1;
1428         pos_type pos2 = pos;
1429
1430         // In change tracking mode, ignore deleted characters.
1431         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1432                 ++pos2;
1433         if (pos2 == cur.lastpos())
1434                 return;
1435
1436         while (pos1 >= 0 && par.isDeleted(pos1))
1437                 --pos1;
1438         if (pos1 < 0)
1439                 return;
1440
1441         // Don't do anything if one of the "characters" is not regular text.
1442         if (par.isInset(pos1) || par.isInset(pos2))
1443                 return;
1444
1445         // Store the characters to be transposed (including font information).
1446         char_type char1 = par.getChar(pos1);
1447         Font const font1 =
1448                 par.getFontSettings(cur.buffer().params(), pos1);
1449
1450         char_type char2 = par.getChar(pos2);
1451         Font const font2 =
1452                 par.getFontSettings(cur.buffer().params(), pos2);
1453
1454         // And finally, we are ready to perform the transposition.
1455         // Track the changes if Change Tracking is enabled.
1456         bool const trackChanges = cur.buffer().params().trackChanges;
1457
1458         recordUndo(cur);
1459
1460         par.eraseChar(pos2, trackChanges);
1461         par.eraseChar(pos1, trackChanges);
1462         par.insertChar(pos1, char2, font2, trackChanges);
1463         par.insertChar(pos2, char1, font1, trackChanges);
1464
1465         checkBufferStructure(cur.buffer(), cur);
1466
1467         // After the transposition, move cursor to after the transposition.
1468         setCursor(cur, cur.pit(), pos2);
1469         cur.forwardPos();
1470 }
1471
1472
1473 } // namespace lyx