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 "FontIterator.h"
  38 #include "Language.h"
  39 #include "Length.h"
  40 #include "Lexer.h"
  41 #include "LyXRC.h"
  42 #include "Paragraph.h"
  43 #include "paragraph_funcs.h"
  44 #include "ParagraphParameters.h"
  45 #include "ParIterator.h"
  46 #include "TextClass.h"
  47 #include "TextMetrics.h"
  48 #include "VSpace.h"
  49 #include "WordLangTuple.h"
  50 #include "WordList.h"
  51
  52 #include "insets/InsetText.h"
  53 #include "insets/InsetBibitem.h"
  54 #include "insets/InsetCaption.h"
  55 #include "insets/InsetHFill.h"
  56 #include "insets/InsetLine.h"
  57 #include "insets/InsetNewline.h"
  58 #include "insets/InsetNewpage.h"
  59 #include "insets/InsetOptArg.h"
  60 #include "insets/InsetSpace.h"
  61 #include "insets/InsetSpecialChar.h"
  62 #include "insets/InsetTabular.h"
  63
  64 #include "support/convert.h"
  65 #include "support/debug.h"
  66 #include "support/docstream.h"
  67 #include "support/gettext.h"
  68 #include "support/lstrings.h"
  69 #include "support/textutils.h"
  70
  71 #include <boost/next_prior.hpp>
  72
  73 #include <sstream>
  74
  75 using namespace std;
  76 using namespace lyx::support;
  77
  78 namespace lyx {
  79
  80 using cap::cutSelection;
  81 using cap::pasteParagraphList;
  82
  83 namespace {
  84
  85 void readParToken(Buffer const & buf, Paragraph & par, Lexer & lex,
  86         string const & token, Font & font, Change & change, ErrorList & errorList)
  87 {
  88         BufferParams const & bp = buf.params();
  89
  90         if (token[0] != '\\') {
  91                 docstring dstr = lex.getDocString();
  92                 par.appendString(dstr, font, change);
  93
  94         } else if (token == "\\begin_layout") {
  95                 lex.eatLine();
  96                 docstring layoutname = lex.getDocString();
  97
  98                 font = Font(inherit_font, bp.language);
  99                 change = Change(Change::UNCHANGED);
 100
 101                 DocumentClass const & tclass = bp.documentClass();
 102
 103                 if (layoutname.empty())
 104                         layoutname = tclass.defaultLayoutName();
 105
 106                 if (par.forceEmptyLayout()) {
 107                         // in this case only the empty layout is allowed
 108                         layoutname = tclass.emptyLayoutName();
 109                 } else if (par.useEmptyLayout()) {
 110                         // in this case, default layout maps to empty layout
 111                         if (layoutname == tclass.defaultLayoutName())
 112                                 layoutname = tclass.emptyLayoutName();
 113                 } else {
 114                         // otherwise, the empty layout maps to the default
 115                         if (layoutname == tclass.emptyLayoutName())
 116                                 layoutname = tclass.defaultLayoutName();
 117                 }
 118
 119                 bool hasLayout = tclass.hasLayout(layoutname);
 120
 121                 if (!hasLayout) {
 122                         errorList.push_back(ErrorItem(_("Unknown layout"),
 123                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 124                         layoutname, from_utf8(tclass.name())), par.id(), 0, par.size()));
 125                         layoutname = par.useEmptyLayout() ?
 126                                         tclass.emptyLayoutName() :
 127                                         tclass.defaultLayoutName();
 128                 }
 129
 130                 par.setLayout(bp.documentClass()[layoutname]);
 131
 132                 // Test whether the layout is obsolete.
 133                 Layout const & layout = par.layout();
 134                 if (!layout.obsoleted_by().empty())
 135                         par.setLayout(bp.documentClass()[layout.obsoleted_by()]);
 136
 137                 par.params().read(lex);
 138
 139         } else if (token == "\\end_layout") {
 140                 LYXERR0("Solitary \\end_layout in line " << lex.getLineNo() << "\n"
 141                        << "Missing \\begin_layout ?");
 142         } else if (token == "\\end_inset") {
 143                 LYXERR0("Solitary \\end_inset in line " << lex.getLineNo() << "\n"
 144                        << "Missing \\begin_inset ?");
 145         } else if (token == "\\begin_inset") {
 146                 Inset * inset = readInset(lex, buf);
 147                 if (inset)
 148                         par.insertInset(par.size(), inset, font, change);
 149                 else {
 150                         lex.eatLine();
 151                         docstring line = lex.getDocString();
 152                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 153                                             par.id(), 0, par.size()));
 154                 }
 155         } else if (token == "\\family") {
 156                 lex.next();
 157                 setLyXFamily(lex.getString(), font.fontInfo());
 158         } else if (token == "\\series") {
 159                 lex.next();
 160                 setLyXSeries(lex.getString(), font.fontInfo());
 161         } else if (token == "\\shape") {
 162                 lex.next();
 163                 setLyXShape(lex.getString(), font.fontInfo());
 164         } else if (token == "\\size") {
 165                 lex.next();
 166                 setLyXSize(lex.getString(), font.fontInfo());
 167         } else if (token == "\\lang") {
 168                 lex.next();
 169                 string const tok = lex.getString();
 170                 Language const * lang = languages.getLanguage(tok);
 171                 if (lang) {
 172                         font.setLanguage(lang);
 173                 } else {
 174                         font.setLanguage(bp.language);
 175                         lex.printError("Unknown language `$$Token'");
 176                 }
 177         } else if (token == "\\numeric") {
 178                 lex.next();
 179                 font.fontInfo().setNumber(font.setLyXMisc(lex.getString()));
 180         } else if (token == "\\emph") {
 181                 lex.next();
 182                 font.fontInfo().setEmph(font.setLyXMisc(lex.getString()));
 183         } else if (token == "\\bar") {
 184                 lex.next();
 185                 string const tok = lex.getString();
 186
 187                 if (tok == "under")
 188                         font.fontInfo().setUnderbar(FONT_ON);
 189                 else if (tok == "no")
 190                         font.fontInfo().setUnderbar(FONT_OFF);
 191                 else if (tok == "default")
 192                         font.fontInfo().setUnderbar(FONT_INHERIT);
 193                 else
 194                         lex.printError("Unknown bar font flag "
 195                                        "`$$Token'");
 196         } else if (token == "\\noun") {
 197                 lex.next();
 198                 font.fontInfo().setNoun(font.setLyXMisc(lex.getString()));
 199         } else if (token == "\\color") {
 200                 lex.next();
 201                 setLyXColor(lex.getString(), font.fontInfo());
 202         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 203
 204                 // Insets don't make sense in a free-spacing context! ---Kayvan
 205                 if (par.isFreeSpacing()) {
 206                         if (token == "\\InsetSpace")
 207                                 par.appendChar(' ', font, change);
 208                         else if (lex.isOK()) {
 209                                 lex.next();
 210                                 string const next_token = lex.getString();
 211                                 if (next_token == "\\-")
 212                                         par.appendChar('-', font, change);
 213                                 else {
 214                                         lex.printError("Token `$$Token' "
 215                                                        "is in free space "
 216                                                        "paragraph layout!");
 217                                 }
 218                         }
 219                 } else {
 220                         auto_ptr<Inset> inset;
 221                         if (token == "\\SpecialChar" )
 222                                 inset.reset(new InsetSpecialChar);
 223                         else
 224                                 inset.reset(new InsetSpace);
 225                         inset->read(lex);
 226                         par.insertInset(par.size(), inset.release(),
 227                                         font, change);
 228                 }
 229         } else if (token == "\\backslash") {
 230                 par.appendChar('\\', font, change);
 231         } else if (token == "\\linebreak") {
 232                 auto_ptr<Inset> inset(new InsetLinebreak);
 233                 inset->read(lex);
 234                 par.insertInset(par.size(), inset.release(), font, change);
 235         } else if (token == "\\newline") {
 236                 auto_ptr<Inset> inset(new InsetNewline);
 237                 inset->read(lex);
 238                 par.insertInset(par.size(), inset.release(), font, change);
 239         } else if (token == "\\LyXTable") {
 240                 auto_ptr<Inset> inset(new InsetTabular(buf));
 241                 inset->read(lex);
 242                 par.insertInset(par.size(), inset.release(), font, change);
 243         } else if (token == "\\hfill") {
 244                 par.insertInset(par.size(), new InsetHFill, font, change);
 245         } else if (token == "\\lyxline") {
 246                 par.insertInset(par.size(), new InsetLine, font, change);
 247         } else if (token == "\\newpage") {
 248                 par.insertInset(par.size(), new InsetNewpage, font, change);
 249         } else if (token == "\\pagebreak") {
 250                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 251         } else if (token == "\\clearpage") {
 252                 par.insertInset(par.size(), new InsetClearPage, font, change);
 253         } else if (token == "\\cleardoublepage") {
 254                 par.insertInset(par.size(), new InsetClearDoublePage, font, change);
 255         } else if (token == "\\change_unchanged") {
 256                 change = Change(Change::UNCHANGED);
 257         } else if (token == "\\change_inserted") {
 258                 lex.eatLine();
 259                 istringstream is(lex.getString());
 260                 unsigned int aid;
 261                 time_t ct;
 262                 is >> aid >> ct;
 263                 if (aid >= bp.author_map.size()) {
 264                         errorList.push_back(ErrorItem(_("Change tracking error"),
 265                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 266                                             par.id(), 0, par.size()));
 267                         change = Change(Change::UNCHANGED);
 268                 } else
 269                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 270         } else if (token == "\\change_deleted") {
 271                 lex.eatLine();
 272                 istringstream is(lex.getString());
 273                 unsigned int aid;
 274                 time_t ct;
 275                 is >> aid >> ct;
 276                 if (aid >= bp.author_map.size()) {
 277                         errorList.push_back(ErrorItem(_("Change tracking error"),
 278                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 279                                             par.id(), 0, par.size()));
 280                         change = Change(Change::UNCHANGED);
 281                 } else
 282                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 283         } else {
 284                 lex.eatLine();
 285                 errorList.push_back(ErrorItem(_("Unknown token"),
 286                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 287                         lex.getDocString()),
 288                         par.id(), 0, par.size()));
 289         }
 290 }
 291
 292
 293 void readParagraph(Buffer const & buf, Paragraph & par, Lexer & lex,
 294         ErrorList & errorList)
 295 {
 296         lex.nextToken();
 297         string token = lex.getString();
 298         Font font;
 299         Change change(Change::UNCHANGED);
 300
 301         while (lex.isOK()) {
 302                 readParToken(buf, par, lex, token, font, change, errorList);
 303
 304                 lex.nextToken();
 305                 token = lex.getString();
 306
 307                 if (token.empty())
 308                         continue;
 309
 310                 if (token == "\\end_layout") {
 311                         //Ok, paragraph finished
 312                         break;
 313                 }
 314
 315                 LYXERR(Debug::PARSER, "Handling paragraph token: `" << token << '\'');
 316                 if (token == "\\begin_layout" || token == "\\end_document"
 317                     || token == "\\end_inset" || token == "\\begin_deeper"
 318                     || token == "\\end_deeper") {
 319                         lex.pushToken(token);
 320                         lyxerr << "Paragraph ended in line "
 321                                << lex.getLineNo() << "\n"
 322                                << "Missing \\end_layout.\n";
 323                         break;
 324                 }
 325         }
 326         // Final change goes to paragraph break:
 327         par.setChange(par.size(), change);
 328
 329         // Initialize begin_of_body_ on load; redoParagraph maintains
 330         par.setBeginOfBody();
 331 }
 332
 333
 334 } // namespace anon
 335
 336 class TextCompletionList : public CompletionList
 337 {
 338 public:
 339         ///
 340         TextCompletionList(Cursor const & cur)
 341         : buf_(cur.buffer()), pos_(0) {}
 342         ///
 343         virtual ~TextCompletionList() {}
 344
 345         ///
 346         virtual bool sorted() const { return true; }
 347         ///
 348         virtual size_t size() const
 349         {
 350                 return theWordList().size();
 351         }
 352         ///
 353         virtual docstring const & data(size_t idx) const
 354         {
 355                 return theWordList().word(idx);
 356         }
 357
 358 private:
 359         ///
 360         Buffer const & buf_;
 361         ///
 362         size_t pos_;
 363 };
 364
 365
 366 bool Text::empty() const
 367 {
 368         return pars_.empty() || (pars_.size() == 1 && pars_[0].empty()
 369                 // FIXME: Should we consider the labeled type as empty too?
 370                 && pars_[0].layout().labeltype == LABEL_NO_LABEL);
 371 }
 372
 373
 374 double Text::spacing(Buffer const & buffer, Paragraph const & par) const
 375 {
 376         if (par.params().spacing().isDefault())
 377                 return buffer.params().spacing().getValue();
 378         return par.params().spacing().getValue();
 379 }
 380
 381
 382 void Text::breakParagraph(Cursor & cur, bool inverse_logic)
 383 {
 384         BOOST_ASSERT(this == cur.text());
 385
 386         Paragraph & cpar = cur.paragraph();
 387         pit_type cpit = cur.pit();
 388
 389         DocumentClass const & tclass = cur.buffer().params().documentClass();
 390         Layout const & layout = cpar.layout();
 391
 392         // this is only allowed, if the current paragraph is not empty
 393         // or caption and if it has not the keepempty flag active
 394         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 395             layout.labeltype != LABEL_SENSITIVE)
 396                 return;
 397
 398         // a layout change may affect also the following paragraph
 399         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 400
 401         // Always break behind a space
 402         // It is better to erase the space (Dekel)
 403         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 404                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
 405
 406         // What should the layout for the new paragraph be?
 407         bool keep_layout = inverse_logic ?
 408                 !layout.isEnvironment()
 409                 : layout.isEnvironment();
 410
 411         // We need to remember this before we break the paragraph, because
 412         // that invalidates the layout variable
 413         bool sensitive = layout.labeltype == LABEL_SENSITIVE;
 414
 415         // we need to set this before we insert the paragraph.
 416         bool const isempty = cpar.allowEmpty() && cpar.empty();
 417
 418         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
 419                          cur.pos(), keep_layout);
 420
 421         // After this, neither paragraph contains any rows!
 422
 423         cpit = cur.pit();
 424         pit_type next_par = cpit + 1;
 425
 426         // well this is the caption hack since one caption is really enough
 427         if (sensitive) {
 428                 if (cur.pos() == 0)
 429                         // set to standard-layout
 430                 //FIXME Check if this should be emptyLayout() in some cases
 431                         pars_[cpit].applyLayout(tclass.defaultLayout());
 432                 else
 433                         // set to standard-layout
 434                         //FIXME Check if this should be emptyLayout() in some cases
 435                         pars_[next_par].applyLayout(tclass.defaultLayout());
 436         }
 437
 438         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 439                 if (!pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges))
 440                         break; // the character couldn't be deleted physically due to change tracking
 441         }
 442
 443         updateLabels(cur.buffer());
 444
 445         // A singlePar update is not enough in this case.
 446         cur.updateFlags(Update::Force);
 447
 448         // This check is necessary. Otherwise the new empty paragraph will
 449         // be deleted automatically. And it is more friendly for the user!
 450         if (cur.pos() != 0 || isempty)
 451                 setCursor(cur, cur.pit() + 1, 0);
 452         else
 453                 setCursor(cur, cur.pit(), 0);
 454 }
 455
 456
 457 // insert a character, moves all the following breaks in the
 458 // same Paragraph one to the right and make a rebreak
 459 void Text::insertChar(Cursor & cur, char_type c)
 460 {
 461         BOOST_ASSERT(this == cur.text());
 462
 463         cur.recordUndo(INSERT_UNDO);
 464
 465         TextMetrics const & tm = cur.bv().textMetrics(this);
 466         Buffer const & buffer = cur.buffer();
 467         Paragraph & par = cur.paragraph();
 468         // try to remove this
 469         pit_type const pit = cur.pit();
 470
 471         bool const freeSpacing = par.layout().free_spacing ||
 472                 par.isFreeSpacing();
 473
 474         if (lyxrc.auto_number) {
 475                 static docstring const number_operators = from_ascii("+-/*");
 476                 static docstring const number_unary_operators = from_ascii("+-");
 477                 static docstring const number_seperators = from_ascii(".,:");
 478
 479                 if (cur.current_font.fontInfo().number() == FONT_ON) {
 480                         if (!isDigit(c) && !contains(number_operators, c) &&
 481                             !(contains(number_seperators, c) &&
 482                               cur.pos() != 0 &&
 483                               cur.pos() != cur.lastpos() &&
 484                               tm.displayFont(pit, cur.pos()).fontInfo().number() == FONT_ON &&
 485                               tm.displayFont(pit, cur.pos() - 1).fontInfo().number() == FONT_ON)
 486                            )
 487                                 number(cur); // Set current_font.number to OFF
 488                 } else if (isDigit(c) &&
 489                            cur.real_current_font.isVisibleRightToLeft()) {
 490                         number(cur); // Set current_font.number to ON
 491
 492                         if (cur.pos() != 0) {
 493                                 char_type const c = par.getChar(cur.pos() - 1);
 494                                 if (contains(number_unary_operators, c) &&
 495                                     (cur.pos() == 1
 496                                      || par.isSeparator(cur.pos() - 2)
 497                                      || par.isNewline(cur.pos() - 2))
 498                                   ) {
 499                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 500                                                 tm.font_);
 501                                 } else if (contains(number_seperators, c)
 502                                      && cur.pos() >= 2
 503                                      && tm.displayFont(pit, cur.pos() - 2).fontInfo().number() == FONT_ON) {
 504                                         setCharFont(buffer, pit, cur.pos() - 1, cur.current_font,
 505                                                 tm.font_);
 506                                 }
 507                         }
 508                 }
 509         }
 510
 511         // In Bidi text, we want spaces to be treated in a special way: spaces
 512         // which are between words in different languages should get the
 513         // paragraph's language; otherwise, spaces should keep the language
 514         // they were originally typed in. This is only in effect while typing;
 515         // after the text is already typed in, the user can always go back and
 516         // explicitly set the language of a space as desired. But 99.9% of the
 517         // time, what we're doing here is what the user actually meant.
 518         //
 519         // The following cases are the ones in which the language of the space
 520         // should be changed to match that of the containing paragraph. In the
 521         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 522         // represents a space, pipe (|) represents the cursor position (so the
 523         // character before it is the one just typed in). The different cases
 524         // are depicted logically (not visually), from left to right:
 525         //
 526         // 1. A_a|
 527         // 2. a_A|
 528         //
 529         // Theoretically, there are other situations that we should, perhaps, deal
 530         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 531         // point (to understand why, just try to create this situation...).
 532
 533         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 534                 // get font in front and behind the space in question. But do NOT
 535                 // use getFont(cur.pos()) because the character c is not inserted yet
 536                 Font const pre_space_font  = tm.displayFont(cur.pit(), cur.pos() - 2);
 537                 Font const & post_space_font = cur.real_current_font;
 538                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 539                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 540
 541                 if (pre_space_rtl != post_space_rtl) {
 542                         // Set the space's language to match the language of the
 543                         // adjacent character whose direction is the paragraph's
 544                         // direction; don't touch other properties of the font
 545                         Language const * lang =
 546                                 (pre_space_rtl == par.isRTL(buffer.params())) ?
 547                                 pre_space_font.language() : post_space_font.language();
 548
 549                         Font space_font = tm.displayFont(cur.pit(), cur.pos() - 1);
 550                         space_font.setLanguage(lang);
 551                         par.setFont(cur.pos() - 1, space_font);
 552                 }
 553         }
 554
 555         // Next check, if there will be two blanks together or a blank at
 556         // the beginning of a paragraph.
 557         // I decided to handle blanks like normal characters, the main
 558         // difference are the special checks when calculating the row.fill
 559         // (blank does not count at the end of a row) and the check here
 560
 561         // When the free-spacing option is set for the current layout,
 562         // disable the double-space checking
 563         if (!freeSpacing && isLineSeparatorChar(c)) {
 564                 if (cur.pos() == 0) {
 565                         static bool sent_space_message = false;
 566                         if (!sent_space_message) {
 567                                 cur.message(_("You cannot insert a space at the "
 568                                                            "beginning of a paragraph. Please read the Tutorial."));
 569                                 sent_space_message = true;
 570                         }
 571                         return;
 572                 }
 573                 BOOST_ASSERT(cur.pos() > 0);
 574                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 575                     && !par.isDeleted(cur.pos() - 1)) {
 576                         static bool sent_space_message = false;
 577                         if (!sent_space_message) {
 578                                 cur.message(_("You cannot type two spaces this way. "
 579                                                            "Please read the Tutorial."));
 580                                 sent_space_message = true;
 581                         }
 582                         return;
 583                 }
 584         }
 585
 586         par.insertChar(cur.pos(), c, cur.current_font, cur.buffer().params().trackChanges);
 587         cur.checkBufferStructure();
 588
 589 //              cur.updateFlags(Update::Force);
 590         setCursor(cur.top(), cur.pit(), cur.pos() + 1);
 591         charInserted(cur);
 592 }
 593
 594
 595 void Text::charInserted(Cursor & cur)
 596 {
 597         Paragraph & par = cur.paragraph();
 598
 599         // Here we call finishUndo for every 20 characters inserted.
 600         // This is from my experience how emacs does it. (Lgb)
 601         static unsigned int counter;
 602         if (counter < 20) {
 603                 ++counter;
 604         } else {
 605                 cur.finishUndo();
 606                 counter = 0;
 607         }
 608
 609         // register word if a non-letter was entered
 610         if (cur.pos() > 1
 611             && par.isLetter(cur.pos() - 2)
 612             && !par.isLetter(cur.pos() - 1)) {
 613                 // get the word in front of cursor
 614                 BOOST_ASSERT(this == cur.text());
 615                 cur.paragraph().updateWords(cur.top());
 616         }
 617 }
 618
 619
 620 // the cursor set functions have a special mechanism. When they
 621 // realize, that you left an empty paragraph, they will delete it.
 622
 623 bool Text::cursorForwardOneWord(Cursor & cur)
 624 {
 625         BOOST_ASSERT(this == cur.text());
 626
 627         Cursor old = cur;
 628
 629         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
 630                 ++old.pit();
 631                 old.pos() = 0;
 632         } else {
 633                 // Advance through word.
 634                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
 635                         ++old.pos();
 636                 // Skip through trailing nonword stuff.
 637                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
 638                         ++old.pos();
 639         }
 640         return setCursor(cur, old.pit(), old.pos());
 641 }
 642
 643
 644 bool Text::cursorBackwardOneWord(Cursor & cur)
 645 {
 646         BOOST_ASSERT(this == cur.text());
 647
 648         Cursor old = cur;
 649
 650         if (old.pos() == 0 && old.pit() != 0) {
 651                 --old.pit();
 652                 old.pos() = old.lastpos();
 653         } else {
 654                 // Skip through initial nonword stuff.
 655                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
 656                         --old.pos();
 657                 // Advance through word.
 658                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
 659                         --old.pos();
 660         }
 661         return setCursor(cur, old.pit(), old.pos());
 662 }
 663
 664
 665 void Text::selectWord(Cursor & cur, word_location loc)
 666 {
 667         BOOST_ASSERT(this == cur.text());
 668         CursorSlice from = cur.top();
 669         CursorSlice to = cur.top();
 670         getWord(from, to, loc);
 671         if (cur.top() != from)
 672                 setCursor(cur, from.pit(), from.pos());
 673         if (to == from)
 674                 return;
 675         cur.resetAnchor();
 676         setCursor(cur, to.pit(), to.pos());
 677         cur.setSelection();
 678 }
 679
 680
 681 // Select the word currently under the cursor when no
 682 // selection is currently set
 683 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
 684 {
 685         BOOST_ASSERT(this == cur.text());
 686         if (cur.selection())
 687                 return false;
 688         selectWord(cur, loc);
 689         return cur.selection();
 690 }
 691
 692
 693 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
 694 {
 695         BOOST_ASSERT(this == cur.text());
 696
 697         if (!cur.selection())
 698                 return;
 699
 700         cur.recordUndoSelection();
 701
 702         pit_type begPit = cur.selectionBegin().pit();
 703         pit_type endPit = cur.selectionEnd().pit();
 704
 705         pos_type begPos = cur.selectionBegin().pos();
 706         pos_type endPos = cur.selectionEnd().pos();
 707
 708         // keep selection info, because endPos becomes invalid after the first loop
 709         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
 710
 711         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
 712
 713         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 714                 pos_type parSize = pars_[pit].size();
 715
 716                 // ignore empty paragraphs; otherwise, an assertion will fail for
 717                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
 718                 if (parSize == 0)
 719                         continue;
 720
 721                 // do not consider first paragraph if the cursor starts at pos size()
 722                 if (pit == begPit && begPos == parSize)
 723                         continue;
 724
 725                 // do not consider last paragraph if the cursor ends at pos 0
 726                 if (pit == endPit && endPos == 0)
 727                         break; // last iteration anyway
 728
 729                 pos_type left  = (pit == begPit ? begPos : 0);
 730                 pos_type right = (pit == endPit ? endPos : parSize);
 731
 732                 if (op == ACCEPT) {
 733                         pars_[pit].acceptChanges(cur.buffer().params(), left, right);
 734                 } else {
 735                         pars_[pit].rejectChanges(cur.buffer().params(), left, right);
 736                 }
 737         }
 738
 739         // next, accept/reject imaginary end-of-par characters
 740
 741         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 742                 pos_type pos = pars_[pit].size();
 743
 744                 // skip if the selection ends before the end-of-par
 745                 if (pit == endPit && endsBeforeEndOfPar)
 746                         break; // last iteration anyway
 747
 748                 // skip if this is not the last paragraph of the document
 749                 // note: the user should be able to accept/reject the par break of the last par!
 750                 if (pit == endPit && pit + 1 != int(pars_.size()))
 751                         break; // last iteration anway
 752
 753                 if (op == ACCEPT) {
 754                         if (pars_[pit].isInserted(pos)) {
 755                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 756                         } else if (pars_[pit].isDeleted(pos)) {
 757                                 if (pit + 1 == int(pars_.size())) {
 758                                         // we cannot remove a par break at the end of the last paragraph;
 759                                         // instead, we mark it unchanged
 760                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 761                                 } else {
 762                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 763                                         --endPit;
 764                                         --pit;
 765                                 }
 766                         }
 767                 } else {
 768                         if (pars_[pit].isDeleted(pos)) {
 769                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 770                         } else if (pars_[pit].isInserted(pos)) {
 771                                 if (pit + 1 == int(pars_.size())) {
 772                                         // we mark the par break at the end of the last paragraph unchanged
 773                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 774                                 } else {
 775                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 776                                         --endPit;
 777                                         --pit;
 778                                 }
 779                         }
 780                 }
 781         }
 782
 783         // finally, invoke the DEPM
 784
 785         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer().params().trackChanges);
 786
 787         //
 788
 789         cur.finishUndo();
 790         cur.clearSelection();
 791         setCursorIntern(cur, begPit, begPos);
 792         cur.updateFlags(Update::Force);
 793         updateLabels(cur.buffer());
 794 }
 795
 796
 797 void Text::acceptChanges(BufferParams const & bparams)
 798 {
 799         lyx::acceptChanges(pars_, bparams);
 800         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
 801 }
 802
 803
 804 void Text::rejectChanges(BufferParams const & bparams)
 805 {
 806         pit_type pars_size = static_cast<pit_type>(pars_.size());
 807
 808         // first, reject changes within each individual paragraph
 809         // (do not consider end-of-par)
 810         for (pit_type pit = 0; pit < pars_size; ++pit) {
 811                 if (!pars_[pit].empty())   // prevent assertion failure
 812                         pars_[pit].rejectChanges(bparams, 0, pars_[pit].size());
 813         }
 814
 815         // next, reject imaginary end-of-par characters
 816         for (pit_type pit = 0; pit < pars_size; ++pit) {
 817                 pos_type pos = pars_[pit].size();
 818
 819                 if (pars_[pit].isDeleted(pos)) {
 820                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 821                 } else if (pars_[pit].isInserted(pos)) {
 822                         if (pit == pars_size - 1) {
 823                                 // we mark the par break at the end of the last
 824                                 // paragraph unchanged
 825                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 826                         } else {
 827                                 mergeParagraph(bparams, pars_, pit);
 828                                 --pit;
 829                                 --pars_size;
 830                         }
 831                 }
 832         }
 833
 834         // finally, invoke the DEPM
 835         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
 836 }
 837
 838
 839 void Text::deleteWordForward(Cursor & cur)
 840 {
 841         BOOST_ASSERT(this == cur.text());
 842         if (cur.lastpos() == 0)
 843                 cursorForward(cur);
 844         else {
 845                 cur.resetAnchor();
 846                 cur.selection() = true;
 847                 cursorForwardOneWord(cur);
 848                 cur.setSelection();
 849                 cutSelection(cur, true, false);
 850                 cur.checkBufferStructure();
 851         }
 852 }
 853
 854
 855 void Text::deleteWordBackward(Cursor & cur)
 856 {
 857         BOOST_ASSERT(this == cur.text());
 858         if (cur.lastpos() == 0)
 859                 cursorBackward(cur);
 860         else {
 861                 cur.resetAnchor();
 862                 cur.selection() = true;
 863                 cursorBackwardOneWord(cur);
 864                 cur.setSelection();
 865                 cutSelection(cur, true, false);
 866                 cur.checkBufferStructure();
 867         }
 868 }
 869
 870
 871 // Kill to end of line.
 872 void Text::changeCase(Cursor & cur, TextCase action)
 873 {
 874         BOOST_ASSERT(this == cur.text());
 875         CursorSlice from;
 876         CursorSlice to;
 877
 878         bool gotsel = false;
 879         if (cur.selection()) {
 880                 from = cur.selBegin();
 881                 to = cur.selEnd();
 882                 gotsel = true;
 883         } else {
 884                 from = cur.top();
 885                 getWord(from, to, PARTIAL_WORD);
 886                 cursorForwardOneWord(cur);
 887         }
 888
 889         cur.recordUndoSelection();
 890
 891         pit_type begPit = from.pit();
 892         pit_type endPit = to.pit();
 893
 894         pos_type begPos = from.pos();
 895         pos_type endPos = to.pos();
 896
 897         pos_type right = 0; // needed after the for loop
 898
 899         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 900                 Paragraph & par = pars_[pit];
 901                 pos_type const pos = (pit == begPit ? begPos : 0);
 902                 right = (pit == endPit ? endPos : par.size());
 903                 par.changeCase(cur.buffer().params(), pos, right, action);
 904         }
 905
 906         // the selection may have changed due to logically-only deleted chars
 907         if (gotsel) {
 908                 setCursor(cur, begPit, begPos);
 909                 cur.resetAnchor();
 910                 setCursor(cur, endPit, right);
 911                 cur.setSelection();
 912         } else
 913                 setCursor(cur, endPit, right);
 914
 915         cur.checkBufferStructure();
 916 }
 917
 918
 919 bool Text::handleBibitems(Cursor & cur)
 920 {
 921         if (cur.paragraph().layout().labeltype != LABEL_BIBLIO)
 922                 return false;
 923
 924         if (cur.pos() != 0)
 925                 return false;
 926
 927         BufferParams const & bufparams = cur.buffer().params();
 928         Paragraph const & par = cur.paragraph();
 929         Cursor prevcur = cur;
 930         if (cur.pit() > 0) {
 931                 --prevcur.pit();
 932                 prevcur.pos() = prevcur.lastpos();
 933         }
 934         Paragraph const & prevpar = prevcur.paragraph();
 935
 936         // if a bibitem is deleted, merge with previous paragraph
 937         // if this is a bibliography item as well
 938         if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
 939                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
 940                 mergeParagraph(bufparams, cur.text()->paragraphs(),
 941                                                         prevcur.pit());
 942                 updateLabels(cur.buffer());
 943                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
 944                 cur.updateFlags(Update::Force);
 945                 return true;
 946         }
 947
 948         // otherwise reset to default
 949         cur.paragraph().setEmptyOrDefaultLayout(bufparams.documentClass());
 950         return true;
 951 }
 952
 953
 954 bool Text::erase(Cursor & cur)
 955 {
 956         BOOST_ASSERT(this == cur.text());
 957         bool needsUpdate = false;
 958         Paragraph & par = cur.paragraph();
 959
 960         if (cur.pos() != cur.lastpos()) {
 961                 // this is the code for a normal delete, not pasting
 962                 // any paragraphs
 963                 cur.recordUndo(DELETE_UNDO);
 964                 bool const was_inset = cur.paragraph().isInset(cur.pos());
 965                 if(!par.eraseChar(cur.pos(), cur.buffer().params().trackChanges))
 966                         // the character has been logically deleted only => skip it
 967                         cur.top().forwardPos();
 968
 969                 if (was_inset)
 970                         updateLabels(cur.buffer());
 971                 else
 972                         cur.checkBufferStructure();
 973                 needsUpdate = true;
 974         } else {
 975                 if (cur.pit() == cur.lastpit())
 976                         return dissolveInset(cur);
 977
 978                 if (!par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
 979                         par.setChange(cur.pos(), Change(Change::DELETED));
 980                         cur.forwardPos();
 981                         needsUpdate = true;
 982                 } else {
 983                         setCursorIntern(cur, cur.pit() + 1, 0);
 984                         needsUpdate = backspacePos0(cur);
 985                 }
 986         }
 987
 988         needsUpdate |= handleBibitems(cur);
 989
 990         if (needsUpdate) {
 991                 // Make sure the cursor is correct. Is this really needed?
 992                 // No, not really... at least not here!
 993                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
 994                 cur.checkBufferStructure();
 995         }
 996
 997         return needsUpdate;
 998 }
 999
1000
1001 bool Text::backspacePos0(Cursor & cur)
1002 {
1003         BOOST_ASSERT(this == cur.text());
1004         if (cur.pit() == 0)
1005                 return false;
1006
1007         bool needsUpdate = false;
1008
1009         BufferParams const & bufparams = cur.buffer().params();
1010         DocumentClass const & tclass = bufparams.documentClass();
1011         ParagraphList & plist = cur.text()->paragraphs();
1012         Paragraph const & par = cur.paragraph();
1013         Cursor prevcur = cur;
1014         --prevcur.pit();
1015         prevcur.pos() = prevcur.lastpos();
1016         Paragraph const & prevpar = prevcur.paragraph();
1017
1018         // is it an empty paragraph?
1019         if (cur.lastpos() == 0
1020             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1021                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1022                 plist.erase(boost::next(plist.begin(), cur.pit()));
1023                 needsUpdate = true;
1024         }
1025         // is previous par empty?
1026         else if (prevcur.lastpos() == 0
1027                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1028                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit(), cur.pit());
1029                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1030                 needsUpdate = true;
1031         }
1032         // Pasting is not allowed, if the paragraphs have different
1033         // layouts. I think it is a real bug of all other
1034         // word processors to allow it. It confuses the user.
1035         // Correction: Pasting is always allowed with standard-layout
1036         // or the empty layout.
1037         else if (par.layout() == prevpar.layout()
1038                  || tclass.isDefaultLayout(par.layout())
1039                  || tclass.isEmptyLayout(par.layout())) {
1040                 cur.recordUndo(ATOMIC_UNDO, prevcur.pit());
1041                 mergeParagraph(bufparams, plist, prevcur.pit());
1042                 needsUpdate = true;
1043         }
1044
1045         if (needsUpdate) {
1046                 updateLabels(cur.buffer());
1047                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1048         }
1049
1050         return needsUpdate;
1051 }
1052
1053
1054 bool Text::backspace(Cursor & cur)
1055 {
1056         BOOST_ASSERT(this == cur.text());
1057         bool needsUpdate = false;
1058         if (cur.pos() == 0) {
1059                 if (cur.pit() == 0)
1060                         return dissolveInset(cur);
1061
1062                 Paragraph & prev_par = pars_[cur.pit() - 1];
1063
1064                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1065                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1066                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1067                         return true;
1068                 }
1069                 // The cursor is at the beginning of a paragraph, so
1070                 // the backspace will collapse two paragraphs into one.
1071                 needsUpdate = backspacePos0(cur);
1072
1073         } else {
1074                 // this is the code for a normal backspace, not pasting
1075                 // any paragraphs
1076                 cur.recordUndo(DELETE_UNDO);
1077                 // We used to do cursorBackwardIntern() here, but it is
1078                 // not a good idea since it triggers the auto-delete
1079                 // mechanism. So we do a cursorBackwardIntern()-lite,
1080                 // without the dreaded mechanism. (JMarc)
1081                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1082                                 false, cur.boundary());
1083                 bool const was_inset = cur.paragraph().isInset(cur.pos());
1084                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1085                 if (was_inset)
1086                         updateLabels(cur.buffer());
1087                 else
1088                         cur.checkBufferStructure();
1089         }
1090
1091         if (cur.pos() == cur.lastpos())
1092                 cur.setCurrentFont();
1093
1094         needsUpdate |= handleBibitems(cur);
1095
1096         // A singlePar update is not enough in this case.
1097 //              cur.updateFlags(Update::Force);
1098         setCursor(cur.top(), cur.pit(), cur.pos());
1099
1100         return needsUpdate;
1101 }
1102
1103
1104 bool Text::dissolveInset(Cursor & cur) {
1105         BOOST_ASSERT(this == cur.text());
1106
1107         if (isMainText(cur.bv().buffer()) || cur.inset().nargs() != 1)
1108                 return false;
1109
1110         cur.recordUndoInset();
1111         cur.mark() = false;
1112         cur.selHandle(false);
1113         // save position
1114         pos_type spos = cur.pos();
1115         pit_type spit = cur.pit();
1116         ParagraphList plist;
1117         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1118                 plist = paragraphs();
1119         cur.popBackward();
1120         // store cursor offset
1121         if (spit == 0)
1122                 spos += cur.pos();
1123         spit += cur.pit();
1124         Buffer & b = cur.buffer();
1125         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1126         if (!plist.empty()) {
1127                 // ERT paragraphs have the Language latex_language.
1128                 // This is invalid outside of ERT, so we need to
1129                 // change it to the buffer language.
1130                 ParagraphList::iterator it = plist.begin();
1131                 ParagraphList::iterator it_end = plist.end();
1132                 for (; it != it_end; it++)
1133                         it->changeLanguage(b.params(), latex_language, b.language());
1134
1135                 pasteParagraphList(cur, plist, b.params().documentClassPtr(),
1136                                    b.errorList("Paste"));
1137                 // restore position
1138                 cur.pit() = min(cur.lastpit(), spit);
1139                 cur.pos() = min(cur.lastpos(), spos);
1140         }
1141         cur.clearSelection();
1142         cur.resetAnchor();
1143         return true;
1144 }
1145
1146
1147 void Text::getWord(CursorSlice & from, CursorSlice & to,
1148         word_location const loc) const
1149 {
1150         Paragraph const & from_par = pars_[from.pit()];
1151         switch (loc) {
1152         case WHOLE_WORD_STRICT:
1153                 if (from.pos() == 0 || from.pos() == from_par.size()
1154                     || !from_par.isLetter(from.pos())
1155                     || !from_par.isLetter(from.pos() - 1)) {
1156                         to = from;
1157                         return;
1158                 }
1159                 // no break here, we go to the next
1160
1161         case WHOLE_WORD:
1162                 // If we are already at the beginning of a word, do nothing
1163                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1164                         break;
1165                 // no break here, we go to the next
1166
1167         case PREVIOUS_WORD:
1168                 // always move the cursor to the beginning of previous word
1169                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1170                         --from.pos();
1171                 break;
1172         case NEXT_WORD:
1173                 LYXERR0("Text::getWord: NEXT_WORD not implemented yet");
1174                 break;
1175         case PARTIAL_WORD:
1176                 // no need to move the 'from' cursor
1177                 break;
1178         }
1179         to = from;
1180         Paragraph const & to_par = pars_[to.pit()];
1181         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1182                 ++to.pos();
1183 }
1184
1185
1186 void Text::write(Buffer const & buf, ostream & os) const
1187 {
1188         ParagraphList::const_iterator pit = paragraphs().begin();
1189         ParagraphList::const_iterator end = paragraphs().end();
1190         depth_type dth = 0;
1191         for (; pit != end; ++pit)
1192                 pit->write(os, buf.params(), dth);
1193
1194         // Close begin_deeper
1195         for(; dth > 0; --dth)
1196                 os << "\n\\end_deeper";
1197 }
1198
1199
1200 bool Text::read(Buffer const & buf, Lexer & lex,
1201                 ErrorList & errorList, InsetText * insetPtr)
1202 {
1203         depth_type depth = 0;
1204
1205         while (lex.isOK()) {
1206                 lex.nextToken();
1207                 string const token = lex.getString();
1208
1209                 if (token.empty())
1210                         continue;
1211
1212                 if (token == "\\end_inset")
1213                         break;
1214
1215                 if (token == "\\end_body")
1216                         continue;
1217
1218                 if (token == "\\begin_body")
1219                         continue;
1220
1221                 if (token == "\\end_document")
1222                         return false;
1223
1224                 if (token == "\\begin_layout") {
1225                         lex.pushToken(token);
1226
1227                         Paragraph par;
1228                         par.params().depth(depth);
1229                         par.setFont(0, Font(inherit_font, buf.params().language));
1230                         par.setInsetOwner(insetPtr);
1231                         pars_.push_back(par);
1232
1233                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1234                         // not BufferParams
1235                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
1236
1237                         // register the words in the global word list
1238                         CursorSlice sl = CursorSlice(*insetPtr);
1239                         sl.pit() = pars_.size() - 1;
1240                         pars_.back().updateWords(sl);
1241                 } else if (token == "\\begin_deeper") {
1242                         ++depth;
1243                 } else if (token == "\\end_deeper") {
1244                         if (!depth)
1245                                 lex.printError("\\end_deeper: " "depth is already null");
1246                         else
1247                                 --depth;
1248                 } else {
1249                         LYXERR0("Handling unknown body token: `" << token << '\'');
1250                 }
1251         }
1252         return true;
1253 }
1254
1255 // Returns the current font and depth as a message.
1256 docstring Text::currentState(Cursor & cur)
1257 {
1258         BOOST_ASSERT(this == cur.text());
1259         Buffer & buf = cur.buffer();
1260         Paragraph const & par = cur.paragraph();
1261         odocstringstream os;
1262
1263         if (buf.params().trackChanges)
1264                 os << _("[Change Tracking] ");
1265
1266         Change change = par.lookupChange(cur.pos());
1267
1268         if (change.type != Change::UNCHANGED) {
1269                 Author const & a = buf.params().authors().get(change.author);
1270                 os << _("Change: ") << a.name();
1271                 if (!a.email().empty())
1272                         os << " (" << a.email() << ")";
1273                 // FIXME ctime is english, we should translate that
1274                 os << _(" at ") << ctime(&change.changetime);
1275                 os << " : ";
1276         }
1277
1278         // I think we should only show changes from the default
1279         // font. (Asger)
1280         // No, from the document font (MV)
1281         Font font = cur.real_current_font;
1282         font.fontInfo().reduce(buf.params().getFont().fontInfo());
1283
1284         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1285
1286         // The paragraph depth
1287         int depth = cur.paragraph().getDepth();
1288         if (depth > 0)
1289                 os << bformat(_(", Depth: %1$d"), depth);
1290
1291         // The paragraph spacing, but only if different from
1292         // buffer spacing.
1293         Spacing const & spacing = par.params().spacing();
1294         if (!spacing.isDefault()) {
1295                 os << _(", Spacing: ");
1296                 switch (spacing.getSpace()) {
1297                 case Spacing::Single:
1298                         os << _("Single");
1299                         break;
1300                 case Spacing::Onehalf:
1301                         os << _("OneHalf");
1302                         break;
1303                 case Spacing::Double:
1304                         os << _("Double");
1305                         break;
1306                 case Spacing::Other:
1307                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1308                         break;
1309                 case Spacing::Default:
1310                         // should never happen, do nothing
1311                         break;
1312                 }
1313         }
1314
1315 #ifdef DEVEL_VERSION
1316         os << _(", Inset: ") << &cur.inset();
1317         os << _(", Paragraph: ") << cur.pit();
1318         os << _(", Id: ") << par.id();
1319         os << _(", Position: ") << cur.pos();
1320         // FIXME: Why is the check for par.size() needed?
1321         // We are called with cur.pos() == par.size() quite often.
1322         if (!par.empty() && cur.pos() < par.size()) {
1323                 // Force output of code point, not character
1324                 size_t const c = par.getChar(cur.pos());
1325                 os << _(", Char: 0x") << hex << c;
1326         }
1327         os << _(", Boundary: ") << cur.boundary();
1328 //      Row & row = cur.textRow();
1329 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1330 #endif
1331         return os.str();
1332 }
1333
1334
1335 docstring Text::getPossibleLabel(Cursor & cur) const
1336 {
1337         pit_type pit = cur.pit();
1338
1339         Layout const * layout = &(pars_[pit].layout());
1340
1341         docstring text;
1342         docstring par_text = pars_[pit].asString(false);
1343         string piece;
1344         // the return string of math matrices might contain linebreaks
1345         par_text = subst(par_text, '\n', '-');
1346         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1347                 if (par_text.empty())
1348                         break;
1349                 docstring head;
1350                 par_text = split(par_text, head, ' ');
1351                 // Is it legal to use spaces in labels ?
1352                 if (i > 0)
1353                         text += '-';
1354                 text += head;
1355         }
1356
1357         // No need for a prefix if the user said so.
1358         if (lyxrc.label_init_length <= 0)
1359                 return text;
1360
1361         // Will contain the label type.
1362         docstring name;
1363
1364         // For section, subsection, etc...
1365         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1366                 Layout const * layout2 = &(pars_[pit - 1].layout());
1367                 if (layout2->latextype != LATEX_PARAGRAPH) {
1368                         --pit;
1369                         layout = layout2;
1370                 }
1371         }
1372         if (layout->latextype != LATEX_PARAGRAPH)
1373                 name = from_ascii(layout->latexname());
1374
1375         // for captions, we just take the caption type
1376         Inset * caption_inset = cur.innerInsetOfType(CAPTION_CODE);
1377         if (caption_inset)
1378                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1379
1380         // If none of the above worked, we'll see if we're inside various
1381         // types of insets and take our abbreviation from them.
1382         if (name.empty()) {
1383                 InsetCode const codes[] = {
1384                         FLOAT_CODE,
1385                         WRAP_CODE,
1386                         FOOT_CODE
1387                 };
1388                 for (unsigned int i = 0; i < (sizeof codes / sizeof codes[0]); ++i) {
1389                         Inset * float_inset = cur.innerInsetOfType(codes[i]);
1390                         if (float_inset) {
1391                                 name = float_inset->name();
1392                                 break;
1393                         }
1394                 }
1395         }
1396
1397         // Create a correct prefix for prettyref
1398         if (name == "theorem")
1399                 name = from_ascii("thm");
1400         else if (name == "Foot")
1401                 name = from_ascii("fn");
1402         else if (name == "listing")
1403                 name = from_ascii("lst");
1404
1405         if (!name.empty())
1406                 text = name.substr(0, 3) + ':' + text;
1407
1408         return text;
1409 }
1410
1411
1412 void Text::charsTranspose(Cursor & cur)
1413 {
1414         BOOST_ASSERT(this == cur.text());
1415
1416         pos_type pos = cur.pos();
1417
1418         // If cursor is at beginning or end of paragraph, do nothing.
1419         if (pos == cur.lastpos() || pos == 0)
1420                 return;
1421
1422         Paragraph & par = cur.paragraph();
1423
1424         // Get the positions of the characters to be transposed.
1425         pos_type pos1 = pos - 1;
1426         pos_type pos2 = pos;
1427
1428         // In change tracking mode, ignore deleted characters.
1429         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1430                 ++pos2;
1431         if (pos2 == cur.lastpos())
1432                 return;
1433
1434         while (pos1 >= 0 && par.isDeleted(pos1))
1435                 --pos1;
1436         if (pos1 < 0)
1437                 return;
1438
1439         // Don't do anything if one of the "characters" is not regular text.
1440         if (par.isInset(pos1) || par.isInset(pos2))
1441                 return;
1442
1443         // Store the characters to be transposed (including font information).
1444         char_type char1 = par.getChar(pos1);
1445         Font const font1 =
1446                 par.getFontSettings(cur.buffer().params(), pos1);
1447
1448         char_type char2 = par.getChar(pos2);
1449         Font const font2 =
1450                 par.getFontSettings(cur.buffer().params(), pos2);
1451
1452         // And finally, we are ready to perform the transposition.
1453         // Track the changes if Change Tracking is enabled.
1454         bool const trackChanges = cur.buffer().params().trackChanges;
1455
1456         cur.recordUndo();
1457
1458         par.eraseChar(pos2, trackChanges);
1459         par.eraseChar(pos1, trackChanges);
1460         par.insertChar(pos1, char2, font2, trackChanges);
1461         par.insertChar(pos2, char1, font1, trackChanges);
1462
1463         cur.checkBufferStructure();
1464
1465         // After the transposition, move cursor to after the transposition.
1466         setCursor(cur, cur.pit(), pos2);
1467         cur.forwardPos();
1468 }
1469
1470
1471 DocIterator Text::macrocontextPosition() const
1472 {
1473         return macrocontext_position_;
1474 }
1475
1476
1477 void Text::setMacrocontextPosition(DocIterator const & pos)
1478 {
1479         macrocontext_position_ = pos;
1480 }
1481
1482
1483 docstring Text::previousWord(CursorSlice const & sl) const
1484 {
1485         CursorSlice from = sl;
1486         CursorSlice to = sl;
1487         getWord(from, to, PREVIOUS_WORD);
1488         if (sl == from || to == from)
1489                 return docstring();
1490
1491         Paragraph const & par = sl.paragraph();
1492         return par.asString(from.pos(), to.pos(), false);
1493 }
1494
1495
1496 bool Text::completionSupported(Cursor const & cur) const
1497 {
1498         Paragraph const & par = cur.paragraph();
1499         return cur.pos() > 0
1500                 && (cur.pos() >= par.size() || !par.isLetter(cur.pos()))
1501                 && par.isLetter(cur.pos() - 1);
1502 }
1503
1504
1505 CompletionList const * Text::createCompletionList(Cursor const & cur) const
1506 {
1507         return new TextCompletionList(cur);
1508 }
1509
1510
1511 bool Text::insertCompletion(Cursor & cur, docstring const & s, bool /*finished*/)
1512 {
1513         BOOST_ASSERT(cur.bv().cursor() == cur);
1514         cur.insert(s);
1515         cur.bv().cursor() = cur;
1516         if (!(cur.disp_.update() & Update::Force))
1517                 cur.updateFlags(cur.disp_.update() | Update::SinglePar);
1518         return true;
1519 }
1520
1521
1522 docstring Text::completionPrefix(Cursor const & cur) const
1523 {
1524         return previousWord(cur.top());
1525 }
1526
1527 } // namespace lyx