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 "bufferview_funcs.h"
  29 #include "Cursor.h"
  30 #include "ParIterator.h"
  31 #include "CoordCache.h"
  32 #include "CutAndPaste.h"
  33 #include "debug.h"
  34 #include "DispatchResult.h"
  35 #include "Encoding.h"
  36 #include "ErrorList.h"
  37 #include "FuncRequest.h"
  38 #include "factory.h"
  39 #include "FontIterator.h"
  40 #include "gettext.h"
  41 #include "Language.h"
  42 #include "Color.h"
  43 #include "Length.h"
  44 #include "Lexer.h"
  45 #include "LyXRC.h"
  46 #include "Row.h"
  47 #include "MetricsInfo.h"
  48 #include "Paragraph.h"
  49 #include "paragraph_funcs.h"
  50 #include "ParagraphParameters.h"
  51 #include "rowpainter.h"
  52 #include "Undo.h"
  53 #include "VSpace.h"
  54 #include "WordLangTuple.h"
  55
  56 #include "frontends/FontMetrics.h"
  57 #include "frontends/Painter.h"
  58
  59 #include "insets/InsetText.h"
  60 #include "insets/InsetBibitem.h"
  61 #include "insets/InsetCaption.h"
  62 #include "insets/InsetHFill.h"
  63 #include "insets/InsetLine.h"
  64 #include "insets/InsetNewline.h"
  65 #include "insets/InsetPagebreak.h"
  66 #include "insets/InsetOptArg.h"
  67 #include "insets/InsetSpace.h"
  68 #include "insets/InsetSpecialChar.h"
  69 #include "insets/InsetTabular.h"
  70
  71 #include "support/lstrings.h"
  72 #include "support/textutils.h"
  73 #include "support/convert.h"
  74
  75 #include <boost/current_function.hpp>
  76
  77 #include <sstream>
  78
  79 using std::auto_ptr;
  80 using std::advance;
  81 using std::distance;
  82 using std::max;
  83 using std::min;
  84 using std::endl;
  85 using std::string;
  86
  87 namespace lyx {
  88
  89 using support::bformat;
  90 using support::contains;
  91 using support::lowercase;
  92 using support::split;
  93 using support::uppercase;
  94
  95 using cap::cutSelection;
  96 using cap::pasteParagraphList;
  97
  98 using frontend::FontMetrics;
  99
 100 namespace {
 101
 102 void readParToken(Buffer const & buf, Paragraph & par, Lexer & lex,
 103         string const & token, Font & font, Change & change, ErrorList & errorList)
 104 {
 105         BufferParams const & bp = buf.params();
 106
 107         if (token[0] != '\\') {
 108 #if 0
 109                 string::const_iterator cit = token.begin();
 110                 for (; cit != token.end(); ++cit)
 111                         par.insertChar(par.size(), (*cit), font, change);
 112 #else
 113                 docstring dstr = lex.getDocString();
 114                 docstring::const_iterator cit = dstr.begin();
 115                 docstring::const_iterator cend = dstr.end();
 116                 for (; cit != cend; ++cit)
 117                         par.insertChar(par.size(), *cit, font, change);
 118 #endif
 119         } else if (token == "\\begin_layout") {
 120                 lex.eatLine();
 121                 string layoutname = lex.getString();
 122
 123                 font = Font(Font::ALL_INHERIT, bp.language);
 124                 change = Change(Change::UNCHANGED);
 125
 126                 TextClass const & tclass = bp.getTextClass();
 127
 128                 if (layoutname.empty()) {
 129                         layoutname = tclass.defaultLayoutName();
 130                 }
 131
 132                 bool hasLayout = tclass.hasLayout(layoutname);
 133
 134                 if (!hasLayout) {
 135                         errorList.push_back(ErrorItem(_("Unknown layout"),
 136                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 137                         from_utf8(layoutname), from_utf8(tclass.name())), par.id(), 0, par.size()));
 138                         layoutname = tclass.defaultLayoutName();
 139                 }
 140
 141                 par.layout(bp.getTextClass()[layoutname]);
 142
 143                 // Test whether the layout is obsolete.
 144                 Layout_ptr const & layout = par.layout();
 145                 if (!layout->obsoleted_by().empty())
 146                         par.layout(bp.getTextClass()[layout->obsoleted_by()]);
 147
 148                 par.params().read(lex);
 149
 150         } else if (token == "\\end_layout") {
 151                 lyxerr << BOOST_CURRENT_FUNCTION
 152                        << ": Solitary \\end_layout in line "
 153                        << lex.getLineNo() << "\n"
 154                        << "Missing \\begin_layout?.\n";
 155         } else if (token == "\\end_inset") {
 156                 lyxerr << BOOST_CURRENT_FUNCTION
 157                        << ": Solitary \\end_inset in line "
 158                        << lex.getLineNo() << "\n"
 159                        << "Missing \\begin_inset?.\n";
 160         } else if (token == "\\begin_inset") {
 161                 Inset * inset = readInset(lex, buf);
 162                 if (inset)
 163                         par.insertInset(par.size(), inset, font, change);
 164                 else {
 165                         lex.eatLine();
 166                         docstring line = lex.getDocString();
 167                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 168                                             par.id(), 0, par.size()));
 169                 }
 170         } else if (token == "\\family") {
 171                 lex.next();
 172                 font.setLyXFamily(lex.getString());
 173         } else if (token == "\\series") {
 174                 lex.next();
 175                 font.setLyXSeries(lex.getString());
 176         } else if (token == "\\shape") {
 177                 lex.next();
 178                 font.setLyXShape(lex.getString());
 179         } else if (token == "\\size") {
 180                 lex.next();
 181                 font.setLyXSize(lex.getString());
 182         } else if (token == "\\lang") {
 183                 lex.next();
 184                 string const tok = lex.getString();
 185                 Language const * lang = languages.getLanguage(tok);
 186                 if (lang) {
 187                         font.setLanguage(lang);
 188                 } else {
 189                         font.setLanguage(bp.language);
 190                         lex.printError("Unknown language `$$Token'");
 191                 }
 192         } else if (token == "\\numeric") {
 193                 lex.next();
 194                 font.setNumber(font.setLyXMisc(lex.getString()));
 195         } else if (token == "\\emph") {
 196                 lex.next();
 197                 font.setEmph(font.setLyXMisc(lex.getString()));
 198         } else if (token == "\\bar") {
 199                 lex.next();
 200                 string const tok = lex.getString();
 201
 202                 if (tok == "under")
 203                         font.setUnderbar(Font::ON);
 204                 else if (tok == "no")
 205                         font.setUnderbar(Font::OFF);
 206                 else if (tok == "default")
 207                         font.setUnderbar(Font::INHERIT);
 208                 else
 209                         lex.printError("Unknown bar font flag "
 210                                        "`$$Token'");
 211         } else if (token == "\\noun") {
 212                 lex.next();
 213                 font.setNoun(font.setLyXMisc(lex.getString()));
 214         } else if (token == "\\color") {
 215                 lex.next();
 216                 font.setLyXColor(lex.getString());
 217         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 218
 219                 // Insets don't make sense in a free-spacing context! ---Kayvan
 220                 if (par.isFreeSpacing()) {
 221                         if (token == "\\InsetSpace")
 222                                 par.insertChar(par.size(), ' ', font, change);
 223                         else if (lex.isOK()) {
 224                                 lex.next();
 225                                 string const next_token = lex.getString();
 226                                 if (next_token == "\\-")
 227                                         par.insertChar(par.size(), '-', font, change);
 228                                 else {
 229                                         lex.printError("Token `$$Token' "
 230                                                        "is in free space "
 231                                                        "paragraph layout!");
 232                                 }
 233                         }
 234                 } else {
 235                         auto_ptr<Inset> inset;
 236                         if (token == "\\SpecialChar" )
 237                                 inset.reset(new InsetSpecialChar);
 238                         else
 239                                 inset.reset(new InsetSpace);
 240                         inset->read(buf, lex);
 241                         par.insertInset(par.size(), inset.release(),
 242                                         font, change);
 243                 }
 244         } else if (token == "\\backslash") {
 245                 par.insertChar(par.size(), '\\', font, change);
 246         } else if (token == "\\newline") {
 247                 auto_ptr<Inset> inset(new InsetNewline);
 248                 inset->read(buf, lex);
 249                 par.insertInset(par.size(), inset.release(), font, change);
 250         } else if (token == "\\LyXTable") {
 251                 auto_ptr<Inset> inset(new InsetTabular(buf));
 252                 inset->read(buf, lex);
 253                 par.insertInset(par.size(), inset.release(), font, change);
 254         } else if (token == "\\hfill") {
 255                 par.insertInset(par.size(), new InsetHFill, font, change);
 256         } else if (token == "\\lyxline") {
 257                 par.insertInset(par.size(), new InsetLine, font, change);
 258         } else if (token == "\\newpage") {
 259                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 260         } else if (token == "\\clearpage") {
 261                 par.insertInset(par.size(), new InsetClearPage, font, change);
 262         } else if (token == "\\cleardoublepage") {
 263                 par.insertInset(par.size(), new InsetClearDoublePage, font, change);
 264         } else if (token == "\\change_unchanged") {
 265                 change = Change(Change::UNCHANGED);
 266         } else if (token == "\\change_inserted") {
 267                 lex.eatLine();
 268                 std::istringstream is(lex.getString());
 269                 unsigned int aid;
 270                 time_type ct;
 271                 is >> aid >> ct;
 272                 if (aid >= bp.author_map.size()) {
 273                         errorList.push_back(ErrorItem(_("Change tracking error"),
 274                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 275                                             par.id(), 0, par.size()));
 276                         change = Change(Change::UNCHANGED);
 277                 } else
 278                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 279         } else if (token == "\\change_deleted") {
 280                 lex.eatLine();
 281                 std::istringstream is(lex.getString());
 282                 unsigned int aid;
 283                 time_type ct;
 284                 is >> aid >> ct;
 285                 if (aid >= bp.author_map.size()) {
 286                         errorList.push_back(ErrorItem(_("Change tracking error"),
 287                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 288                                             par.id(), 0, par.size()));
 289                         change = Change(Change::UNCHANGED);
 290                 } else
 291                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 292         } else {
 293                 lex.eatLine();
 294                 errorList.push_back(ErrorItem(_("Unknown token"),
 295                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 296                         lex.getDocString()),
 297                         par.id(), 0, par.size()));
 298         }
 299 }
 300
 301
 302 void readParagraph(Buffer const & buf, Paragraph & par, Lexer & lex,
 303         ErrorList & errorList)
 304 {
 305         lex.nextToken();
 306         string token = lex.getString();
 307         Font font;
 308         Change change(Change::UNCHANGED);
 309
 310         while (lex.isOK()) {
 311                 readParToken(buf, par, lex, token, font, change, errorList);
 312
 313                 lex.nextToken();
 314                 token = lex.getString();
 315
 316                 if (token.empty())
 317                         continue;
 318
 319                 if (token == "\\end_layout") {
 320                         //Ok, paragraph finished
 321                         break;
 322                 }
 323
 324                 LYXERR(Debug::PARSER) << "Handling paragraph token: `"
 325                                       << token << '\'' << endl;
 326                 if (token == "\\begin_layout" || token == "\\end_document"
 327                     || token == "\\end_inset" || token == "\\begin_deeper"
 328                     || token == "\\end_deeper") {
 329                         lex.pushToken(token);
 330                         lyxerr << "Paragraph ended in line "
 331                                << lex.getLineNo() << "\n"
 332                                << "Missing \\end_layout.\n";
 333                         break;
 334                 }
 335         }
 336         // Final change goes to paragraph break:
 337         par.setChange(par.size(), change);
 338
 339         // Initialize begin_of_body_ on load; redoParagraph maintains
 340         par.setBeginOfBody();
 341 }
 342
 343
 344 } // namespace anon
 345
 346
 347
 348 double Text::spacing(Buffer const & buffer,
 349                 Paragraph const & par) const
 350 {
 351         if (par.params().spacing().isDefault())
 352                 return buffer.params().spacing().getValue();
 353         return par.params().spacing().getValue();
 354 }
 355
 356
 357 int Text::singleWidth(Buffer const & buffer, Paragraph const & par,
 358                 pos_type pos) const
 359 {
 360         return singleWidth(par, pos, par.getChar(pos),
 361                 getFont(buffer, par, pos));
 362 }
 363
 364
 365 int Text::singleWidth(Paragraph const & par,
 366                          pos_type pos, char_type c, Font const & font) const
 367 {
 368         // The most common case is handled first (Asger)
 369         if (isPrintable(c)) {
 370                 Language const * language = font.language();
 371                 if (language->rightToLeft()) {
 372                         if (language->lang() == "arabic_arabtex" ||
 373                                 language->lang() == "arabic_arabi" ||
 374                             language->lang() == "farsi") {
 375                                 if (Encodings::isComposeChar_arabic(c))
 376                                         return 0;
 377                                 c = par.transformChar(c, pos);
 378                         } else if (language->lang() == "hebrew" &&
 379                                    Encodings::isComposeChar_hebrew(c))
 380                                 return 0;
 381                 }
 382                 return theFontMetrics(font).width(c);
 383         }
 384
 385         if (c == Paragraph::META_INSET)
 386                 return par.getInset(pos)->width();
 387
 388         return theFontMetrics(font).width(c);
 389 }
 390
 391
 392 int Text::leftMargin(Buffer const & buffer, int max_width, pit_type pit) const
 393 {
 394         BOOST_ASSERT(pit >= 0);
 395         BOOST_ASSERT(pit < int(pars_.size()));
 396         return leftMargin(buffer, max_width, pit, pars_[pit].size());
 397 }
 398
 399
 400 int Text::leftMargin(Buffer const & buffer, int max_width,
 401                 pit_type const pit, pos_type const pos) const
 402 {
 403         BOOST_ASSERT(pit >= 0);
 404         BOOST_ASSERT(pit < int(pars_.size()));
 405         Paragraph const & par = pars_[pit];
 406         BOOST_ASSERT(pos >= 0);
 407         BOOST_ASSERT(pos <= par.size());
 408         //lyxerr << "Text::leftMargin: pit: " << pit << " pos: " << pos << endl;
 409         TextClass const & tclass = buffer.params().getTextClass();
 410         Layout_ptr const & layout = par.layout();
 411
 412         string parindent = layout->parindent;
 413
 414         int l_margin = 0;
 415
 416         if (isMainText(buffer))
 417                 l_margin += changebarMargin();
 418
 419         // FIXME UNICODE
 420         docstring leftm = from_utf8(tclass.leftmargin());
 421         l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(leftm);
 422
 423         if (par.getDepth() != 0) {
 424                 // find the next level paragraph
 425                 pit_type newpar = outerHook(pit, pars_);
 426                 if (newpar != pit_type(pars_.size())) {
 427                         if (pars_[newpar].layout()->isEnvironment()) {
 428                                 l_margin = leftMargin(buffer, max_width, newpar);
 429                         }
 430                         if (par.layout() == tclass.defaultLayout()) {
 431                                 if (pars_[newpar].params().noindent())
 432                                         parindent.erase();
 433                                 else
 434                                         parindent = pars_[newpar].layout()->parindent;
 435                         }
 436                 }
 437         }
 438
 439         // This happens after sections in standard classes. The 1.3.x
 440         // code compared depths too, but it does not seem necessary
 441         // (JMarc)
 442         if (par.layout() == tclass.defaultLayout()
 443             && pit > 0 && pars_[pit - 1].layout()->nextnoindent)
 444                 parindent.erase();
 445
 446         Font const labelfont = getLabelFont(buffer, par);
 447         FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
 448
 449         switch (layout->margintype) {
 450         case MARGIN_DYNAMIC:
 451                 if (!layout->leftmargin.empty()) {
 452                         // FIXME UNICODE
 453                         docstring leftm = from_utf8(layout->leftmargin);
 454                         l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(leftm);
 455                 }
 456                 if (!par.getLabelstring().empty()) {
 457                         // FIXME UNICODE
 458                         docstring labin = from_utf8(layout->labelindent);
 459                         l_margin += labelfont_metrics.signedWidth(labin);
 460                         docstring labstr = par.getLabelstring();
 461                         l_margin += labelfont_metrics.width(labstr);
 462                         docstring labsep = from_utf8(layout->labelsep);
 463                         l_margin += labelfont_metrics.width(labsep);
 464                 }
 465                 break;
 466
 467         case MARGIN_MANUAL: {
 468                 // FIXME UNICODE
 469                 docstring labin = from_utf8(layout->labelindent);
 470                 l_margin += labelfont_metrics.signedWidth(labin);
 471                 // The width of an empty par, even with manual label, should be 0
 472                 if (!par.empty() && pos >= par.beginOfBody()) {
 473                         if (!par.getLabelWidthString().empty()) {
 474                                 docstring labstr = par.getLabelWidthString();
 475                                 l_margin += labelfont_metrics.width(labstr);
 476                                 docstring labsep = from_utf8(layout->labelsep);
 477                                 l_margin += labelfont_metrics.width(labsep);
 478                         }
 479                 }
 480                 break;
 481         }
 482
 483         case MARGIN_STATIC: {
 484                 // FIXME UNICODE
 485                 docstring leftm = from_utf8(layout->leftmargin);
 486                 l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(leftm)
 487                         * 4     / (par.getDepth() + 4);
 488                 break;
 489         }
 490
 491         case MARGIN_FIRST_DYNAMIC:
 492                 if (layout->labeltype == LABEL_MANUAL) {
 493                         if (pos >= par.beginOfBody()) {
 494                                 // FIXME UNICODE
 495                                 l_margin += labelfont_metrics.signedWidth(
 496                                         from_utf8(layout->leftmargin));
 497                         } else {
 498                                 // FIXME UNICODE
 499                                 l_margin += labelfont_metrics.signedWidth(
 500                                         from_utf8(layout->labelindent));
 501                         }
 502                 } else if (pos != 0
 503                            // Special case to fix problems with
 504                            // theorems (JMarc)
 505                            || (layout->labeltype == LABEL_STATIC
 506                                && layout->latextype == LATEX_ENVIRONMENT
 507                                && !isFirstInSequence(pit, pars_))) {
 508                         // FIXME UNICODE
 509                         l_margin += labelfont_metrics.signedWidth(from_utf8(layout->leftmargin));
 510                 } else if (layout->labeltype != LABEL_TOP_ENVIRONMENT
 511                            && layout->labeltype != LABEL_BIBLIO
 512                            && layout->labeltype !=
 513                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 514                         l_margin += labelfont_metrics.signedWidth(from_utf8(layout->labelindent));
 515                         l_margin += labelfont_metrics.width(from_utf8(layout->labelsep));
 516                         l_margin += labelfont_metrics.width(par.getLabelstring());
 517                 }
 518                 break;
 519
 520         case MARGIN_RIGHT_ADDRESS_BOX: {
 521 #if 0
 522                 // ok, a terrible hack. The left margin depends on the widest
 523                 // row in this paragraph.
 524                 RowList::iterator rit = par.rows().begin();
 525                 RowList::iterator end = par.rows().end();
 526 #ifdef WITH_WARNINGS
 527 #warning This is wrong.
 528 #endif
 529                 int minfill = max_width;
 530                 for ( ; rit != end; ++rit)
 531                         if (rit->fill() < minfill)
 532                                 minfill = rit->fill();
 533                 l_margin += theFontMetrics(params.getFont()).signedWidth(layout->leftmargin);
 534                 l_margin += minfill;
 535 #endif
 536                 // also wrong, but much shorter.
 537                 l_margin += max_width / 2;
 538                 break;
 539         }
 540         }
 541
 542         if (!par.params().leftIndent().zero())
 543                 l_margin += par.params().leftIndent().inPixels(max_width);
 544
 545         LyXAlignment align;
 546
 547         if (par.params().align() == LYX_ALIGN_LAYOUT)
 548                 align = layout->align;
 549         else
 550                 align = par.params().align();
 551
 552         // set the correct parindent
 553         if (pos == 0
 554             && (layout->labeltype == LABEL_NO_LABEL
 555                || layout->labeltype == LABEL_TOP_ENVIRONMENT
 556                || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 557                || (layout->labeltype == LABEL_STATIC
 558                    && layout->latextype == LATEX_ENVIRONMENT
 559                    && !isFirstInSequence(pit, pars_)))
 560             && align == LYX_ALIGN_BLOCK
 561             && !par.params().noindent()
 562             // in some insets, paragraphs are never indented
 563             && !(par.inInset() && par.inInset()->neverIndent(buffer))
 564             // display style insets are always centered, omit indentation
 565             && !(!par.empty()
 566                     && par.isInset(pos)
 567                     && par.getInset(pos)->display())
 568             && (par.layout() != tclass.defaultLayout()
 569                 || buffer.params().paragraph_separation ==
 570                    BufferParams::PARSEP_INDENT))
 571         {
 572                 docstring din = from_utf8(parindent);
 573                 l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(din);
 574         }
 575
 576         return l_margin;
 577 }
 578
 579
 580 Color_color Text::backgroundColor() const
 581 {
 582         return Color_color(Color::color(background_color_));
 583 }
 584
 585
 586 void Text::breakParagraph(Cursor & cur, bool keep_layout)
 587 {
 588         BOOST_ASSERT(this == cur.text());
 589
 590         Paragraph & cpar = cur.paragraph();
 591         pit_type cpit = cur.pit();
 592
 593         TextClass const & tclass = cur.buffer().params().getTextClass();
 594         Layout_ptr const & layout = cpar.layout();
 595
 596         // this is only allowed, if the current paragraph is not empty
 597         // or caption and if it has not the keepempty flag active
 598         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 599             layout->labeltype != LABEL_SENSITIVE)
 600                 return;
 601
 602         // a layout change may affect also the following paragraph
 603         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 604
 605         // Always break behind a space
 606         // It is better to erase the space (Dekel)
 607         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 608                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
 609
 610         // What should the layout for the new paragraph be?
 611         int preserve_layout = 0;
 612         if (keep_layout)
 613                 preserve_layout = 2;
 614         else
 615                 preserve_layout = layout->isEnvironment();
 616
 617         // We need to remember this before we break the paragraph, because
 618         // that invalidates the layout variable
 619         bool sensitive = layout->labeltype == LABEL_SENSITIVE;
 620
 621         // we need to set this before we insert the paragraph.
 622         bool const isempty = cpar.allowEmpty() && cpar.empty();
 623
 624         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
 625                          cur.pos(), preserve_layout);
 626
 627         // After this, neither paragraph contains any rows!
 628
 629         cpit = cur.pit();
 630         pit_type next_par = cpit + 1;
 631
 632         // well this is the caption hack since one caption is really enough
 633         if (sensitive) {
 634                 if (cur.pos() == 0)
 635                         // set to standard-layout
 636                         pars_[cpit].applyLayout(tclass.defaultLayout());
 637                 else
 638                         // set to standard-layout
 639                         pars_[next_par].applyLayout(tclass.defaultLayout());
 640         }
 641
 642         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 643                 if (!pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges))
 644                         break; // the character couldn't be deleted physically due to change tracking
 645         }
 646
 647         ParIterator current_it(cur);
 648         ParIterator last_it(cur);
 649         ++last_it;
 650         ++last_it;
 651
 652         updateLabels(cur.buffer(), current_it, last_it);
 653
 654         // A singlePar update is not enough in this case.
 655         cur.updateFlags(Update::Force);
 656
 657         // This check is necessary. Otherwise the new empty paragraph will
 658         // be deleted automatically. And it is more friendly for the user!
 659         if (cur.pos() != 0 || isempty)
 660                 setCursor(cur, cur.pit() + 1, 0);
 661         else
 662                 setCursor(cur, cur.pit(), 0);
 663 }
 664
 665
 666 // insert a character, moves all the following breaks in the
 667 // same Paragraph one to the right and make a rebreak
 668 void Text::insertChar(Cursor & cur, char_type c)
 669 {
 670         BOOST_ASSERT(this == cur.text());
 671         BOOST_ASSERT(c != Paragraph::META_INSET);
 672
 673         recordUndo(cur, Undo::INSERT);
 674
 675         Buffer const & buffer = cur.buffer();
 676         Paragraph & par = cur.paragraph();
 677         // try to remove this
 678         pit_type const pit = cur.pit();
 679
 680         bool const freeSpacing = par.layout()->free_spacing ||
 681                 par.isFreeSpacing();
 682
 683         if (lyxrc.auto_number) {
 684                 static docstring const number_operators = from_ascii("+-/*");
 685                 static docstring const number_unary_operators = from_ascii("+-");
 686                 static docstring const number_seperators = from_ascii(".,:");
 687
 688                 if (current_font.number() == Font::ON) {
 689                         if (!isDigit(c) && !contains(number_operators, c) &&
 690                             !(contains(number_seperators, c) &&
 691                               cur.pos() != 0 &&
 692                               cur.pos() != cur.lastpos() &&
 693                               getFont(buffer, par, cur.pos()).number() == Font::ON &&
 694                               getFont(buffer, par, cur.pos() - 1).number() == Font::ON)
 695                            )
 696                                 number(cur); // Set current_font.number to OFF
 697                 } else if (isDigit(c) &&
 698                            real_current_font.isVisibleRightToLeft()) {
 699                         number(cur); // Set current_font.number to ON
 700
 701                         if (cur.pos() != 0) {
 702                                 char_type const c = par.getChar(cur.pos() - 1);
 703                                 if (contains(number_unary_operators, c) &&
 704                                     (cur.pos() == 1
 705                                      || par.isSeparator(cur.pos() - 2)
 706                                      || par.isNewline(cur.pos() - 2))
 707                                   ) {
 708                                         setCharFont(buffer, pit, cur.pos() - 1, current_font);
 709                                 } else if (contains(number_seperators, c)
 710                                      && cur.pos() >= 2
 711                                      && getFont(buffer, par, cur.pos() - 2).number() == Font::ON) {
 712                                         setCharFont(buffer, pit, cur.pos() - 1, current_font);
 713                                 }
 714                         }
 715                 }
 716         }
 717
 718         // In Bidi text, we want spaces to be treated in a special way: spaces
 719         // which are between words in different languages should get the
 720         // paragraph's language; otherwise, spaces should keep the language
 721         // they were originally typed in. This is only in effect while typing;
 722         // after the text is already typed in, the user can always go back and
 723         // explicitly set the language of a space as desired. But 99.9% of the
 724         // time, what we're doing here is what the user actually meant.
 725         //
 726         // The following cases are the ones in which the language of the space
 727         // should be changed to match that of the containing paragraph. In the
 728         // depictions, lowercase is LTR, uppercase is RTL, underscore (_)
 729         // represents a space, pipe (|) represents the cursor position (so the
 730         // character before it is the one just typed in). The different cases
 731         // are depicted logically (not visually), from left to right:
 732         //
 733         // 1. A_a|
 734         // 2. a_A|
 735         //
 736         // Theoretically, there are other situations that we should, perhaps, deal
 737         // with (e.g.: a|_A, A|_a). In practice, though, there really isn't any
 738         // point (to understand why, just try to create this situation...).
 739
 740         if ((cur.pos() >= 2) && (par.isLineSeparator(cur.pos() - 1))) {
 741                 // get font in front and behind the space in question. But do NOT
 742                 // use getFont(cur.pos()) because the character c is not inserted yet
 743                 Font const & pre_space_font  = getFont(buffer, par, cur.pos() - 2);
 744                 Font const & post_space_font = real_current_font;
 745                 bool pre_space_rtl  = pre_space_font.isVisibleRightToLeft();
 746                 bool post_space_rtl = post_space_font.isVisibleRightToLeft();
 747
 748                 if (pre_space_rtl != post_space_rtl) {
 749                         // Set the space's language to match the language of the
 750                         // adjacent character whose direction is the paragraph's
 751                         // direction; don't touch other properties of the font
 752                         Language const * lang =
 753                                 (pre_space_rtl == par.isRightToLeftPar(buffer.params())) ?
 754                                 pre_space_font.language() : post_space_font.language();
 755
 756                         Font space_font = getFont(buffer, par, cur.pos() - 1);
 757                         space_font.setLanguage(lang);
 758                         par.setFont(cur.pos() - 1, space_font);
 759                 }
 760         }
 761
 762         // Next check, if there will be two blanks together or a blank at
 763         // the beginning of a paragraph.
 764         // I decided to handle blanks like normal characters, the main
 765         // difference are the special checks when calculating the row.fill
 766         // (blank does not count at the end of a row) and the check here
 767
 768         // When the free-spacing option is set for the current layout,
 769         // disable the double-space checking
 770         if (!freeSpacing && isLineSeparatorChar(c)) {
 771                 if (cur.pos() == 0) {
 772                         static bool sent_space_message = false;
 773                         if (!sent_space_message) {
 774                                 cur.message(_("You cannot insert a space at the "
 775                                                            "beginning of a paragraph. Please read the Tutorial."));
 776                                 sent_space_message = true;
 777                         }
 778                         return;
 779                 }
 780                 BOOST_ASSERT(cur.pos() > 0);
 781                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 782                     && !par.isDeleted(cur.pos() - 1)) {
 783                         static bool sent_space_message = false;
 784                         if (!sent_space_message) {
 785                                 cur.message(_("You cannot type two spaces this way. "
 786                                                            "Please read the Tutorial."));
 787                                 sent_space_message = true;
 788                         }
 789                         return;
 790                 }
 791         }
 792
 793         par.insertChar(cur.pos(), c, current_font, cur.buffer().params().trackChanges);
 794         checkBufferStructure(cur.buffer(), cur);
 795
 796 //              cur.updateFlags(Update::Force);
 797         setCursor(cur.top(), cur.pit(), cur.pos() + 1);
 798         charInserted();
 799 }
 800
 801
 802 void Text::charInserted()
 803 {
 804         // Here we call finishUndo for every 20 characters inserted.
 805         // This is from my experience how emacs does it. (Lgb)
 806         static unsigned int counter;
 807         if (counter < 20) {
 808                 ++counter;
 809         } else {
 810                 finishUndo();
 811                 counter = 0;
 812         }
 813 }
 814
 815
 816 // the cursor set functions have a special mechanism. When they
 817 // realize, that you left an empty paragraph, they will delete it.
 818
 819 bool Text::cursorRightOneWord(Cursor & cur)
 820 {
 821         BOOST_ASSERT(this == cur.text());
 822
 823         Cursor old = cur;
 824
 825         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
 826                 ++old.pit();
 827                 old.pos() = 0;
 828         } else {
 829                 // Advance through word.
 830                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
 831                         ++old.pos();
 832                 // Skip through trailing nonword stuff.
 833                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
 834                         ++old.pos();
 835         }
 836         return setCursor(cur, old.pit(), old.pos());
 837 }
 838
 839
 840 bool Text::cursorLeftOneWord(Cursor & cur)
 841 {
 842         BOOST_ASSERT(this == cur.text());
 843
 844         Cursor old = cur;
 845
 846         if (old.pos() == 0 && old.pit() != 0) {
 847                 --old.pit();
 848                 old.pos() = old.lastpos();
 849         } else {
 850                 // Skip through initial nonword stuff.
 851                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
 852                         --old.pos();
 853                 // Advance through word.
 854                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
 855                         --old.pos();
 856         }
 857         return setCursor(cur, old.pit(), old.pos());
 858 }
 859
 860
 861 void Text::selectWord(Cursor & cur, word_location loc)
 862 {
 863         BOOST_ASSERT(this == cur.text());
 864         CursorSlice from = cur.top();
 865         CursorSlice to = cur.top();
 866         getWord(from, to, loc);
 867         if (cur.top() != from)
 868                 setCursor(cur, from.pit(), from.pos());
 869         if (to == from)
 870                 return;
 871         cur.resetAnchor();
 872         setCursor(cur, to.pit(), to.pos());
 873         cur.setSelection();
 874         cap::saveSelection(cur);
 875 }
 876
 877
 878 // Select the word currently under the cursor when no
 879 // selection is currently set
 880 bool Text::selectWordWhenUnderCursor(Cursor & cur, word_location loc)
 881 {
 882         BOOST_ASSERT(this == cur.text());
 883         if (cur.selection())
 884                 return false;
 885         selectWord(cur, loc);
 886         return cur.selection();
 887 }
 888
 889
 890 void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
 891 {
 892         BOOST_ASSERT(this == cur.text());
 893
 894         if (!cur.selection())
 895                 return;
 896
 897         recordUndoSelection(cur, Undo::ATOMIC);
 898
 899         pit_type begPit = cur.selectionBegin().pit();
 900         pit_type endPit = cur.selectionEnd().pit();
 901
 902         pos_type begPos = cur.selectionBegin().pos();
 903         pos_type endPos = cur.selectionEnd().pos();
 904
 905         // keep selection info, because endPos becomes invalid after the first loop
 906         bool endsBeforeEndOfPar = (endPos < pars_[endPit].size());
 907
 908         // first, accept/reject changes within each individual paragraph (do not consider end-of-par)
 909
 910         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 911                 pos_type parSize = pars_[pit].size();
 912
 913                 // ignore empty paragraphs; otherwise, an assertion will fail for
 914                 // acceptChanges(bparams, 0, 0) or rejectChanges(bparams, 0, 0)
 915                 if (parSize == 0)
 916                         continue;
 917
 918                 // do not consider first paragraph if the cursor starts at pos size()
 919                 if (pit == begPit && begPos == parSize)
 920                         continue;
 921
 922                 // do not consider last paragraph if the cursor ends at pos 0
 923                 if (pit == endPit && endPos == 0)
 924                         break; // last iteration anyway
 925
 926                 pos_type left  = (pit == begPit ? begPos : 0);
 927                 pos_type right = (pit == endPit ? endPos : parSize);
 928
 929                 if (op == ACCEPT) {
 930                         pars_[pit].acceptChanges(cur.buffer().params(), left, right);
 931                 } else {
 932                         pars_[pit].rejectChanges(cur.buffer().params(), left, right);
 933                 }
 934         }
 935
 936         // next, accept/reject imaginary end-of-par characters
 937
 938         for (pit_type pit = begPit; pit <= endPit; ++pit) {
 939                 pos_type pos = pars_[pit].size();
 940
 941                 // skip if the selection ends before the end-of-par
 942                 if (pit == endPit && endsBeforeEndOfPar)
 943                         break; // last iteration anyway
 944
 945                 // skip if this is not the last paragraph of the document
 946                 // note: the user should be able to accept/reject the par break of the last par!
 947                 if (pit == endPit && pit + 1 != int(pars_.size()))
 948                         break; // last iteration anway
 949
 950                 if (op == ACCEPT) {
 951                         if (pars_[pit].isInserted(pos)) {
 952                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 953                         } else if (pars_[pit].isDeleted(pos)) {
 954                                 if (pit + 1 == int(pars_.size())) {
 955                                         // we cannot remove a par break at the end of the last paragraph;
 956                                         // instead, we mark it unchanged
 957                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 958                                 } else {
 959                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 960                                         --endPit;
 961                                         --pit;
 962                                 }
 963                         }
 964                 } else {
 965                         if (pars_[pit].isDeleted(pos)) {
 966                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 967                         } else if (pars_[pit].isInserted(pos)) {
 968                                 if (pit + 1 == int(pars_.size())) {
 969                                         // we mark the par break at the end of the last paragraph unchanged
 970                                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
 971                                 } else {
 972                                         mergeParagraph(cur.buffer().params(), pars_, pit);
 973                                         --endPit;
 974                                         --pit;
 975                                 }
 976                         }
 977                 }
 978         }
 979
 980         // finally, invoke the DEPM
 981
 982         deleteEmptyParagraphMechanism(begPit, endPit, cur.buffer().params().trackChanges);
 983
 984         //
 985
 986         finishUndo();
 987         cur.clearSelection();
 988         setCursorIntern(cur, begPit, begPos);
 989         cur.updateFlags(Update::Force);
 990         updateLabels(cur.buffer());
 991 }
 992
 993
 994 void Text::acceptChanges(BufferParams const & bparams)
 995 {
 996         lyx::acceptChanges(pars_, bparams);
 997         deleteEmptyParagraphMechanism(0, pars_.size() - 1, bparams.trackChanges);
 998 }
 999
1000
1001 void Text::rejectChanges(BufferParams const & bparams)
1002 {
1003         pit_type pars_size = static_cast<pit_type>(pars_.size());
1004
1005         // first, reject changes within each individual paragraph
1006         // (do not consider end-of-par)
1007         for (pit_type pit = 0; pit < pars_size; ++pit) {
1008                 if (!pars_[pit].empty())   // prevent assertion failure
1009                         pars_[pit].rejectChanges(bparams, 0, pars_[pit].size());
1010         }
1011
1012         // next, reject imaginary end-of-par characters
1013         for (pit_type pit = 0; pit < pars_size; ++pit) {
1014                 pos_type pos = pars_[pit].size();
1015
1016                 if (pars_[pit].isDeleted(pos)) {
1017                         pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1018                 } else if (pars_[pit].isInserted(pos)) {
1019                         if (pit == pars_size - 1) {
1020                                 // we mark the par break at the end of the last
1021                                 // paragraph unchanged
1022                                 pars_[pit].setChange(pos, Change(Change::UNCHANGED));
1023                         } else {
1024                                 mergeParagraph(bparams, pars_, pit);
1025                                 --pit;
1026                                 --pars_size;
1027                         }
1028                 }
1029         }
1030
1031         // finally, invoke the DEPM
1032         deleteEmptyParagraphMechanism(0, pars_size - 1, bparams.trackChanges);
1033 }
1034
1035
1036 // Delete from cursor up to the end of the current or next word.
1037 void Text::deleteWordForward(Cursor & cur)
1038 {
1039         BOOST_ASSERT(this == cur.text());
1040         if (cur.lastpos() == 0)
1041                 cursorRight(cur);
1042         else {
1043                 cur.resetAnchor();
1044                 cur.selection() = true;
1045                 cursorRightOneWord(cur);
1046                 cur.setSelection();
1047                 cutSelection(cur, true, false);
1048                 checkBufferStructure(cur.buffer(), cur);
1049         }
1050 }
1051
1052
1053 // Delete from cursor to start of current or prior word.
1054 void Text::deleteWordBackward(Cursor & cur)
1055 {
1056         BOOST_ASSERT(this == cur.text());
1057         if (cur.lastpos() == 0)
1058                 cursorLeft(cur);
1059         else {
1060                 cur.resetAnchor();
1061                 cur.selection() = true;
1062                 cursorLeftOneWord(cur);
1063                 cur.setSelection();
1064                 cutSelection(cur, true, false);
1065                 checkBufferStructure(cur.buffer(), cur);
1066         }
1067 }
1068
1069
1070 // Kill to end of line.
1071 void Text::deleteLineForward(Cursor & cur)
1072 {
1073         BOOST_ASSERT(this == cur.text());
1074         if (cur.lastpos() == 0) {
1075                 // Paragraph is empty, so we just go to the right
1076                 cursorRight(cur);
1077         } else {
1078                 cur.resetAnchor();
1079                 cur.selection() = true; // to avoid deletion
1080                 cursorEnd(cur);
1081                 cur.setSelection();
1082                 // What is this test for ??? (JMarc)
1083                 if (!cur.selection())
1084                         deleteWordForward(cur);
1085                 else
1086                         cutSelection(cur, true, false);
1087                 checkBufferStructure(cur.buffer(), cur);
1088         }
1089 }
1090
1091
1092 void Text::changeCase(Cursor & cur, Text::TextCase action)
1093 {
1094         BOOST_ASSERT(this == cur.text());
1095         CursorSlice from;
1096         CursorSlice to;
1097
1098         if (cur.selection()) {
1099                 from = cur.selBegin();
1100                 to = cur.selEnd();
1101         } else {
1102                 from = cur.top();
1103                 getWord(from, to, PARTIAL_WORD);
1104                 cursorRightOneWord(cur);
1105         }
1106
1107         recordUndoSelection(cur, Undo::ATOMIC);
1108
1109         pit_type begPit = from.pit();
1110         pit_type endPit = to.pit();
1111
1112         pos_type begPos = from.pos();
1113         pos_type endPos = to.pos();
1114
1115         bool const trackChanges = cur.buffer().params().trackChanges;
1116
1117         pos_type right = 0; // needed after the for loop
1118
1119         for (pit_type pit = begPit; pit <= endPit; ++pit) {
1120                 pos_type parSize = pars_[pit].size();
1121
1122                 pos_type pos = (pit == begPit ? begPos : 0);
1123                 right = (pit == endPit ? endPos : parSize);
1124
1125                 // process sequences of modified characters; in change
1126                 // tracking mode, this approach results in much better
1127                 // usability than changing case on a char-by-char basis
1128                 docstring changes;
1129
1130                 bool capitalize = true;
1131
1132                 for (; pos < right; ++pos) {
1133                         char_type oldChar = pars_[pit].getChar(pos);
1134                         char_type newChar = oldChar;
1135
1136                         // ignore insets and don't play with deleted text!
1137                         if (oldChar != Paragraph::META_INSET && !pars_[pit].isDeleted(pos)) {
1138                                 switch (action) {
1139                                 case text_lowercase:
1140                                         newChar = lowercase(oldChar);
1141                                         break;
1142                                 case text_capitalization:
1143                                         if (capitalize) {
1144                                                 newChar = uppercase(oldChar);
1145                                                 capitalize = false;
1146                                         }
1147                                         break;
1148                                 case text_uppercase:
1149                                         newChar = uppercase(oldChar);
1150                                         break;
1151                                 }
1152                         }
1153
1154                         if (!pars_[pit].isLetter(pos) || pars_[pit].isDeleted(pos)) {
1155                                 capitalize = true; // permit capitalization again
1156                         }
1157
1158                         if (oldChar != newChar) {
1159                                 changes += newChar;
1160                         }
1161
1162                         if (oldChar == newChar || pos == right - 1) {
1163                                 if (oldChar != newChar) {
1164                                         pos++; // step behind the changing area
1165                                 }
1166                                 int erasePos = pos - changes.size();
1167                                 for (size_t i = 0; i < changes.size(); i++) {
1168                                         pars_[pit].insertChar(pos, changes[i],
1169                                                 pars_[pit].getFontSettings(cur.buffer().params(),
1170                                                                 erasePos),
1171                                                 trackChanges);
1172                                         if (!pars_[pit].eraseChar(erasePos, trackChanges)) {
1173                                                 ++erasePos;
1174                                                 ++pos; // advance
1175                                                 ++right; // expand selection
1176                                         }
1177                                 }
1178                                 changes.clear();
1179                         }
1180                 }
1181         }
1182
1183         // the selection may have changed due to logically-only deleted chars
1184         setCursor(cur, begPit, begPos);
1185         cur.resetAnchor();
1186         setCursor(cur, endPit, right);
1187         cur.setSelection();
1188
1189         checkBufferStructure(cur.buffer(), cur);
1190 }
1191
1192
1193 bool Text::handleBibitems(Cursor & cur)
1194 {
1195         if (cur.paragraph().layout()->labeltype != LABEL_BIBLIO)
1196                 return false;
1197         // if a bibitem is deleted, merge with previous paragraph
1198         // if this is a bibliography item as well
1199         if (cur.pos() == 0) {
1200                 BufferParams const & bufparams = cur.buffer().params();
1201                 Paragraph const & par = cur.paragraph();
1202                 Cursor prevcur = cur;
1203                 if (cur.pit() > 0) {
1204                         --prevcur.pit();
1205                         prevcur.pos() = prevcur.lastpos();
1206                 }
1207                 Paragraph const & prevpar = prevcur.paragraph();
1208                 if (cur.pit() > 0 && par.layout() == prevpar.layout()) {
1209                         recordUndo(cur, Undo::ATOMIC, prevcur.pit());
1210                         mergeParagraph(bufparams, cur.text()->paragraphs(),
1211                                        prevcur.pit());
1212                         updateLabels(cur.buffer());
1213                         setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1214                         cur.updateFlags(Update::Force);
1215                 // if not, reset the paragraph to default
1216                 } else
1217                         cur.paragraph().layout(
1218                                 bufparams.getTextClass().defaultLayout());
1219                 return true;
1220         }
1221         return false;
1222 }
1223
1224
1225 bool Text::erase(Cursor & cur)
1226 {
1227         BOOST_ASSERT(this == cur.text());
1228         bool needsUpdate = false;
1229         Paragraph & par = cur.paragraph();
1230
1231         if (cur.pos() != cur.lastpos()) {
1232                 // this is the code for a normal delete, not pasting
1233                 // any paragraphs
1234                 recordUndo(cur, Undo::DELETE);
1235                 if(!par.eraseChar(cur.pos(), cur.buffer().params().trackChanges)) {
1236                         // the character has been logically deleted only => skip it
1237                         cur.forwardPosNoDescend();
1238                 }
1239                 checkBufferStructure(cur.buffer(), cur);
1240                 needsUpdate = true;
1241         } else {
1242                 if (cur.pit() == cur.lastpit())
1243                         return dissolveInset(cur);
1244
1245                 if (!par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1246                         par.setChange(cur.pos(), Change(Change::DELETED));
1247                         cur.forwardPos();
1248                         needsUpdate = true;
1249                 } else {
1250                         setCursorIntern(cur, cur.pit() + 1, 0);
1251                         needsUpdate = backspacePos0(cur);
1252                 }
1253         }
1254
1255         needsUpdate |= handleBibitems(cur);
1256
1257         if (needsUpdate) {
1258                 // Make sure the cursor is correct. Is this really needed?
1259                 // No, not really... at least not here!
1260                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
1261                 checkBufferStructure(cur.buffer(), cur);
1262         }
1263
1264         return needsUpdate;
1265 }
1266
1267
1268 bool Text::backspacePos0(Cursor & cur)
1269 {
1270         BOOST_ASSERT(this == cur.text());
1271         if (cur.pit() == 0)
1272                 return false;
1273
1274         bool needsUpdate = false;
1275
1276         BufferParams const & bufparams = cur.buffer().params();
1277         TextClass const & tclass = bufparams.getTextClass();
1278         ParagraphList & plist = cur.text()->paragraphs();
1279         Paragraph const & par = cur.paragraph();
1280         Cursor prevcur = cur;
1281         --prevcur.pit();
1282         prevcur.pos() = prevcur.lastpos();
1283         Paragraph const & prevpar = prevcur.paragraph();
1284
1285         // is it an empty paragraph?
1286         if (cur.lastpos() == 0
1287             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1288                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1289                 plist.erase(boost::next(plist.begin(), cur.pit()));
1290                 needsUpdate = true;
1291         }
1292         // is previous par empty?
1293         else if (prevcur.lastpos() == 0
1294                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1295                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1296                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1297                 needsUpdate = true;
1298         }
1299         // Pasting is not allowed, if the paragraphs have different
1300         // layouts. I think it is a real bug of all other
1301         // word processors to allow it. It confuses the user.
1302         // Correction: Pasting is always allowed with standard-layout
1303         else if (par.layout() == prevpar.layout()
1304                  || par.layout() == tclass.defaultLayout()) {
1305                 recordUndo(cur, Undo::ATOMIC, prevcur.pit());
1306                 mergeParagraph(bufparams, plist, prevcur.pit());
1307                 needsUpdate = true;
1308         }
1309
1310         if (needsUpdate) {
1311                 updateLabels(cur.buffer());
1312                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1313         }
1314
1315         return needsUpdate;
1316 }
1317
1318
1319 bool Text::backspace(Cursor & cur)
1320 {
1321         BOOST_ASSERT(this == cur.text());
1322         bool needsUpdate = false;
1323         if (cur.pos() == 0) {
1324                 if (cur.pit() == 0)
1325                         return dissolveInset(cur);
1326
1327                 Paragraph & prev_par = pars_[cur.pit() - 1];
1328
1329                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1330                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1331                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1332                         return true;
1333                 }
1334                 // The cursor is at the beginning of a paragraph, so
1335                 // the backspace will collapse two paragraphs into one.
1336                 needsUpdate = backspacePos0(cur);
1337
1338         } else {
1339                 // this is the code for a normal backspace, not pasting
1340                 // any paragraphs
1341                 recordUndo(cur, Undo::DELETE);
1342                 // We used to do cursorLeftIntern() here, but it is
1343                 // not a good idea since it triggers the auto-delete
1344                 // mechanism. So we do a cursorLeftIntern()-lite,
1345                 // without the dreaded mechanism. (JMarc)
1346                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1347                                 false, cur.boundary());
1348                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1349                 checkBufferStructure(cur.buffer(), cur);
1350         }
1351
1352         if (cur.pos() == cur.lastpos())
1353                 setCurrentFont(cur);
1354
1355         needsUpdate |= handleBibitems(cur);
1356
1357         // A singlePar update is not enough in this case.
1358 //              cur.updateFlags(Update::Force);
1359         setCursor(cur.top(), cur.pit(), cur.pos());
1360
1361         return needsUpdate;
1362 }
1363
1364
1365 bool Text::dissolveInset(Cursor & cur) {
1366         BOOST_ASSERT(this == cur.text());
1367
1368         if (isMainText(*cur.bv().buffer()) || cur.inset().nargs() != 1)
1369                 return false;
1370
1371         recordUndoInset(cur);
1372         cur.selHandle(false);
1373         // save position
1374         pos_type spos = cur.pos();
1375         pit_type spit = cur.pit();
1376         ParagraphList plist;
1377         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1378                 plist = paragraphs();
1379         cur.popLeft();
1380         // store cursor offset
1381         if (spit == 0)
1382                 spos += cur.pos();
1383         spit += cur.pit();
1384         Buffer & b = cur.buffer();
1385         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1386         if (!plist.empty()) {
1387                 // ERT paragraphs have the Language latex_language.
1388                 // This is invalid outside of ERT, so we need to
1389                 // change it to the buffer language.
1390                 ParagraphList::iterator it = plist.begin();
1391                 ParagraphList::iterator it_end = plist.end();
1392                 for (; it != it_end; it++) {
1393                         it->changeLanguage(b.params(), latex_language,
1394                                         b.getLanguage());
1395                 }
1396
1397                 pasteParagraphList(cur, plist, b.params().textclass,
1398                                    b.errorList("Paste"));
1399                 // restore position
1400                 cur.pit() = std::min(cur.lastpit(), spit);
1401                 cur.pos() = std::min(cur.lastpos(), spos);
1402         }
1403         cur.clearSelection();
1404         cur.resetAnchor();
1405         return true;
1406 }
1407
1408
1409 // only used for inset right now. should also be used for main text
1410 void Text::draw(PainterInfo & pi, int x, int y) const
1411 {
1412         paintTextInset(*this, pi, x, y);
1413 }
1414
1415
1416 // only used for inset right now. should also be used for main text
1417 void Text::drawSelection(PainterInfo & pi, int x, int) const
1418 {
1419         Cursor & cur = pi.base.bv->cursor();
1420         if (!cur.selection())
1421                 return;
1422         if (!ptr_cmp(cur.text(), this))
1423                 return;
1424
1425         LYXERR(Debug::DEBUG)
1426                 << BOOST_CURRENT_FUNCTION
1427                 << "draw selection at " << x
1428                 << endl;
1429
1430         DocIterator beg = cur.selectionBegin();
1431         DocIterator end = cur.selectionEnd();
1432
1433         BufferView & bv = *pi.base.bv;
1434
1435         // the selection doesn't touch the visible screen?
1436         if (bv_funcs::status(&bv, beg) == bv_funcs::CUR_BELOW
1437             || bv_funcs::status(&bv, end) == bv_funcs::CUR_ABOVE)
1438                 return;
1439
1440         TextMetrics const & tm = bv.textMetrics(this);
1441         ParagraphMetrics const & pm1 = tm.parMetrics(beg.pit());
1442         ParagraphMetrics const & pm2 = tm.parMetrics(end.pit());
1443         Row const & row1 = pm1.getRow(beg.pos(), beg.boundary());
1444         Row const & row2 = pm2.getRow(end.pos(), end.boundary());
1445
1446         // clip above
1447         int middleTop;
1448         bool const clipAbove =
1449                 (bv_funcs::status(&bv, beg) == bv_funcs::CUR_ABOVE);
1450         if (clipAbove)
1451                 middleTop = 0;
1452         else
1453                 middleTop = bv_funcs::getPos(bv, beg, beg.boundary()).y_ + row1.descent();
1454
1455         // clip below
1456         int middleBottom;
1457         bool const clipBelow =
1458                 (bv_funcs::status(&bv, end) == bv_funcs::CUR_BELOW);
1459         if (clipBelow)
1460                 middleBottom = bv.workHeight();
1461         else
1462                 middleBottom = bv_funcs::getPos(bv, end, end.boundary()).y_ - row2.ascent();
1463
1464         // start and end in the same line?
1465         if (!(clipAbove || clipBelow) && &row1 == &row2)
1466                 // then only draw this row's selection
1467                 drawRowSelection(pi, x, row1, beg, end, false, false);
1468         else {
1469                 if (!clipAbove) {
1470                         // get row end
1471                         DocIterator begRowEnd = beg;
1472                         begRowEnd.pos() = row1.endpos();
1473                         begRowEnd.boundary(true);
1474
1475                         // draw upper rectangle
1476                         drawRowSelection(pi, x, row1, beg, begRowEnd, false, true);
1477                 }
1478
1479                 if (middleTop < middleBottom) {
1480                         // draw middle rectangle
1481                         pi.pain.fillRectangle(x, middleTop,
1482                                                                                                                 tm.width(), middleBottom - middleTop,
1483                                                                                                                 Color::selection);
1484                 }
1485
1486                 if (!clipBelow) {
1487                         // get row begin
1488                         DocIterator endRowBeg = end;
1489                         endRowBeg.pos() = row2.pos();
1490                         endRowBeg.boundary(false);
1491
1492                         // draw low rectangle
1493                         drawRowSelection(pi, x, row2, endRowBeg, end, true, false);
1494                 }
1495         }
1496 }
1497
1498
1499 void Text::drawRowSelection(PainterInfo & pi, int x, Row const & row,
1500                                                                                                                 DocIterator const & beg, DocIterator const & end,
1501                                                                                                                 bool drawOnBegMargin, bool drawOnEndMargin) const
1502 {
1503         BufferView & bv = *pi.base.bv;
1504         Buffer & buffer = *bv.buffer();
1505         TextMetrics const & tm = bv.textMetrics(this);
1506         DocIterator cur = beg;
1507         int x1 = cursorX(bv, beg.top(), beg.boundary());
1508         int x2 = cursorX(bv, end.top(), end.boundary());
1509         int y1 = bv_funcs::getPos(bv, cur, cur.boundary()).y_ - row.ascent();
1510         int y2 = y1 + row.height();
1511
1512         // draw the margins
1513         if (drawOnBegMargin) {
1514                 if (isRTL(buffer, beg.paragraph()))
1515                         pi.pain.fillRectangle(x + x1, y1, tm.width() - x1, y2 - y1, Color::selection);
1516                 else
1517                         pi.pain.fillRectangle(x, y1, x1, y2 - y1, Color::selection);
1518         }
1519
1520         if (drawOnEndMargin) {
1521                 if (isRTL(buffer, beg.paragraph()))
1522                         pi.pain.fillRectangle(x, y1, x2, y2 - y1, Color::selection);
1523                 else
1524                         pi.pain.fillRectangle(x + x2, y1, tm.width() - x2, y2 - y1, Color::selection);
1525         }
1526
1527         // if we are on a boundary from the beginning, it's probably
1528         // a RTL boundary and we jump to the other side directly as this
1529         // segement is 0-size and confuses the logic below
1530         if (cur.boundary())
1531                 cur.boundary(false);
1532
1533         // go through row and draw from RTL boundary to RTL boundary
1534         while (cur < end) {
1535                 bool drawNow = false;
1536
1537                 // simplified cursorRight code below which does not
1538                 // descend into insets and which does not go into the
1539                 // next line. Compare the logic with the original cursorRight
1540
1541                 // if left of boundary -> just jump to right side
1542                 // but for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
1543                 if (cur.boundary()) {
1544                         cur.boundary(false);
1545                 }       else if (isRTLBoundary(buffer, cur.paragraph(), cur.pos() + 1)) {
1546                         // in front of RTL boundary -> Stay on this side of the boundary because:
1547                         //   ab|cDDEEFFghi -> abc|DDEEFFghi
1548                         ++cur.pos();
1549                         cur.boundary(true);
1550                         drawNow = true;
1551                 } else {
1552                         // move right
1553                         ++cur.pos();
1554
1555                         // line end?
1556                         if (cur.pos() == row.endpos())
1557                                 cur.boundary(true);
1558                 }
1559
1560                 if (x1 == -1) {
1561                         // the previous segment was just drawn, now the next starts
1562                         x1 = cursorX(bv, cur.top(), cur.boundary());
1563                 }
1564
1565                 if (!(cur < end) || drawNow) {
1566                         x2 = cursorX(bv, cur.top(), cur.boundary());
1567                         pi.pain.fillRectangle(x + min(x1,x2), y1, abs(x2 - x1), y2 - y1,
1568                                                                                                                 Color::selection);
1569
1570                         // reset x1, so it is set again next round (which will be on the
1571                         // right side of a boundary or at the selection end)
1572                         x1 = -1;
1573                 }
1574         }
1575 }
1576
1577
1578
1579 bool Text::isLastRow(pit_type pit, Row const & row) const
1580 {
1581         return row.endpos() >= pars_[pit].size()
1582                 && pit + 1 == pit_type(paragraphs().size());
1583 }
1584
1585
1586 bool Text::isFirstRow(pit_type pit, Row const & row) const
1587 {
1588         return row.pos() == 0 && pit == 0;
1589 }
1590
1591
1592 void Text::getWord(CursorSlice & from, CursorSlice & to,
1593         word_location const loc)
1594 {
1595         Paragraph const & from_par = pars_[from.pit()];
1596         switch (loc) {
1597         case WHOLE_WORD_STRICT:
1598                 if (from.pos() == 0 || from.pos() == from_par.size()
1599                     || !from_par.isLetter(from.pos())
1600                     || !from_par.isLetter(from.pos() - 1)) {
1601                         to = from;
1602                         return;
1603                 }
1604                 // no break here, we go to the next
1605
1606         case WHOLE_WORD:
1607                 // If we are already at the beginning of a word, do nothing
1608                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1609                         break;
1610                 // no break here, we go to the next
1611
1612         case PREVIOUS_WORD:
1613                 // always move the cursor to the beginning of previous word
1614                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1615                         --from.pos();
1616                 break;
1617         case NEXT_WORD:
1618                 lyxerr << "Text::getWord: NEXT_WORD not implemented yet"
1619                        << endl;
1620                 break;
1621         case PARTIAL_WORD:
1622                 // no need to move the 'from' cursor
1623                 break;
1624         }
1625         to = from;
1626         Paragraph & to_par = pars_[to.pit()];
1627         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1628                 ++to.pos();
1629 }
1630
1631
1632 void Text::write(Buffer const & buf, std::ostream & os) const
1633 {
1634         ParagraphList::const_iterator pit = paragraphs().begin();
1635         ParagraphList::const_iterator end = paragraphs().end();
1636         depth_type dth = 0;
1637         for (; pit != end; ++pit)
1638                 pit->write(buf, os, buf.params(), dth);
1639 }
1640
1641
1642 bool Text::read(Buffer const & buf, Lexer & lex, ErrorList & errorList)
1643 {
1644         depth_type depth = 0;
1645
1646         while (lex.isOK()) {
1647                 lex.nextToken();
1648                 string const token = lex.getString();
1649
1650                 if (token.empty())
1651                         continue;
1652
1653                 if (token == "\\end_inset")
1654                         break;
1655
1656                 if (token == "\\end_body")
1657                         continue;
1658
1659                 if (token == "\\begin_body")
1660                         continue;
1661
1662                 if (token == "\\end_document")
1663                         return false;
1664
1665                 if (token == "\\begin_layout") {
1666                         lex.pushToken(token);
1667
1668                         Paragraph par;
1669                         par.params().depth(depth);
1670                         par.setFont(0, Font(Font::ALL_INHERIT, buf.params().language));
1671                         pars_.push_back(par);
1672
1673                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1674                         // not BufferParams
1675                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
1676
1677                 } else if (token == "\\begin_deeper") {
1678                         ++depth;
1679                 } else if (token == "\\end_deeper") {
1680                         if (!depth) {
1681                                 lex.printError("\\end_deeper: " "depth is already null");
1682                         } else {
1683                                 --depth;
1684                         }
1685                 } else {
1686                         lyxerr << "Handling unknown body token: `"
1687                                << token << '\'' << endl;
1688                 }
1689         }
1690         return true;
1691 }
1692
1693 int Text::cursorX(BufferView const & bv, CursorSlice const & sl,
1694                 bool boundary) const
1695 {
1696         TextMetrics const & tm = bv.textMetrics(sl.text());
1697         pit_type const pit = sl.pit();
1698         Paragraph const & par = pars_[pit];
1699         ParagraphMetrics const & pm = tm.parMetrics(pit);
1700         if (pm.rows().empty())
1701                 return 0;
1702
1703         pos_type ppos = sl.pos();
1704         // Correct position in front of big insets
1705         bool const boundary_correction = ppos != 0 && boundary;
1706         if (boundary_correction)
1707                 --ppos;
1708
1709         Row const & row = pm.getRow(sl.pos(), boundary);
1710
1711         pos_type cursor_vpos = 0;
1712
1713         Buffer const & buffer = *bv.buffer();
1714         RowMetrics const m = tm.computeRowMetrics(pit, row);
1715         double x = m.x;
1716         Bidi bidi;
1717         bidi.computeTables(par, buffer, row);
1718
1719         pos_type const row_pos  = row.pos();
1720         pos_type const end      = row.endpos();
1721
1722         if (end <= row_pos)
1723                 cursor_vpos = row_pos;
1724         else if (ppos >= end)
1725                 cursor_vpos = isRTL(buffer, par) ? row_pos : end;
1726         else if (ppos > row_pos && ppos >= end)
1727                 // Place cursor after char at (logical) position pos - 1
1728                 cursor_vpos = (bidi.level(ppos - 1) % 2 == 0)
1729                         ? bidi.log2vis(ppos - 1) + 1 : bidi.log2vis(ppos - 1);
1730         else
1731                 // Place cursor before char at (logical) position ppos
1732                 cursor_vpos = (bidi.level(ppos) % 2 == 0)
1733                         ? bidi.log2vis(ppos) : bidi.log2vis(ppos) + 1;
1734
1735         pos_type body_pos = par.beginOfBody();
1736         if (body_pos > 0 &&
1737             (body_pos > end || !par.isLineSeparator(body_pos - 1)))
1738                 body_pos = 0;
1739
1740         // Use font span to speed things up, see below
1741         FontSpan font_span;
1742         Font font;
1743         FontMetrics const & labelfm = theFontMetrics(
1744                 getLabelFont(buffer, par));
1745
1746         for (pos_type vpos = row_pos; vpos < cursor_vpos; ++vpos) {
1747                 pos_type pos = bidi.vis2log(vpos);
1748                 if (body_pos > 0 && pos == body_pos - 1) {
1749                         // FIXME UNICODE
1750                         docstring const lsep = from_utf8(par.layout()->labelsep);
1751                         x += m.label_hfill + labelfm.width(lsep);
1752                         if (par.isLineSeparator(body_pos - 1))
1753                                 x -= singleWidth(buffer, par, body_pos - 1);
1754                 }
1755
1756                 // Use font span to speed things up, see above
1757                 if (pos < font_span.first || pos > font_span.last) {
1758                         font_span = par.fontSpan(pos);
1759                         font = getFont(buffer, par, pos);
1760                 }
1761
1762                 x += singleWidth(par, pos, par.getChar(pos), font);
1763
1764                 if (par.hfillExpansion(row, pos))
1765                         x += (pos >= body_pos) ? m.hfill : m.label_hfill;
1766                 else if (par.isSeparator(pos) && pos >= body_pos)
1767                         x += m.separator;
1768         }
1769
1770         // see correction above
1771         if (boundary_correction) {
1772                 if (isRTL(buffer, sl, boundary))
1773                         x -= singleWidth(buffer, par, ppos);
1774                 else
1775                         x += singleWidth(buffer, par, ppos);
1776         }
1777
1778         return int(x);
1779 }
1780
1781
1782 int Text::cursorY(BufferView const & bv, CursorSlice const & sl, bool boundary) const
1783 {
1784         //lyxerr << "Text::cursorY: boundary: " << boundary << std::endl;
1785         ParagraphMetrics const & pm = bv.parMetrics(this, sl.pit());
1786         if (pm.rows().empty())
1787                 return 0;
1788
1789         int h = 0;
1790         h -= bv.parMetrics(this, 0).rows()[0].ascent();
1791         for (pit_type pit = 0; pit < sl.pit(); ++pit) {
1792                 h += bv.parMetrics(this, pit).height();
1793         }
1794         int pos = sl.pos();
1795         if (pos && boundary)
1796                 --pos;
1797         size_t const rend = pm.pos2row(pos);
1798         for (size_t rit = 0; rit != rend; ++rit)
1799                 h += pm.rows()[rit].height();
1800         h += pm.rows()[rend].ascent();
1801         return h;
1802 }
1803
1804
1805 // Returns the current font and depth as a message.
1806 docstring Text::currentState(Cursor & cur)
1807 {
1808         BOOST_ASSERT(this == cur.text());
1809         Buffer & buf = cur.buffer();
1810         Paragraph const & par = cur.paragraph();
1811         odocstringstream os;
1812
1813         if (buf.params().trackChanges)
1814                 os << _("[Change Tracking] ");
1815
1816         Change change = par.lookupChange(cur.pos());
1817
1818         if (change.type != Change::UNCHANGED) {
1819                 Author const & a = buf.params().authors().get(change.author);
1820                 os << _("Change: ") << a.name();
1821                 if (!a.email().empty())
1822                         os << " (" << a.email() << ")";
1823                 // FIXME ctime is english, we should translate that
1824                 os << _(" at ") << ctime(&change.changetime);
1825                 os << " : ";
1826         }
1827
1828         // I think we should only show changes from the default
1829         // font. (Asger)
1830         // No, from the document font (MV)
1831         Font font = real_current_font;
1832         font.reduce(buf.params().getFont());
1833
1834         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1835
1836         // The paragraph depth
1837         int depth = cur.paragraph().getDepth();
1838         if (depth > 0)
1839                 os << bformat(_(", Depth: %1$d"), depth);
1840
1841         // The paragraph spacing, but only if different from
1842         // buffer spacing.
1843         Spacing const & spacing = par.params().spacing();
1844         if (!spacing.isDefault()) {
1845                 os << _(", Spacing: ");
1846                 switch (spacing.getSpace()) {
1847                 case Spacing::Single:
1848                         os << _("Single");
1849                         break;
1850                 case Spacing::Onehalf:
1851                         os << _("OneHalf");
1852                         break;
1853                 case Spacing::Double:
1854                         os << _("Double");
1855                         break;
1856                 case Spacing::Other:
1857                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1858                         break;
1859                 case Spacing::Default:
1860                         // should never happen, do nothing
1861                         break;
1862                 }
1863         }
1864
1865 #ifdef DEVEL_VERSION
1866         os << _(", Inset: ") << &cur.inset();
1867         os << _(", Paragraph: ") << cur.pit();
1868         os << _(", Id: ") << par.id();
1869         os << _(", Position: ") << cur.pos();
1870         // FIXME: Why is the check for par.size() needed?
1871         // We are called with cur.pos() == par.size() quite often.
1872         if (!par.empty() && cur.pos() < par.size()) {
1873                 // Force output of code point, not character
1874                 size_t const c = par.getChar(cur.pos());
1875                 os << _(", Char: 0x") << std::hex << c;
1876         }
1877         os << _(", Boundary: ") << cur.boundary();
1878 //      Row & row = cur.textRow();
1879 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1880 #endif
1881         return os.str();
1882 }
1883
1884
1885 docstring Text::getPossibleLabel(Cursor & cur) const
1886 {
1887         pit_type pit = cur.pit();
1888
1889         Layout_ptr layout = pars_[pit].layout();
1890
1891         docstring text;
1892         docstring par_text = pars_[pit].asString(cur.buffer(), false);
1893         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1894                 if (par_text.empty())
1895                         break;
1896                 docstring head;
1897                 par_text = split(par_text, head, ' ');
1898                 // Is it legal to use spaces in labels ?
1899                 if (i > 0)
1900                         text += '-';
1901                 text += head;
1902         }
1903
1904         // No need for a prefix if the user said so.
1905         if (lyxrc.label_init_length <= 0)
1906                 return text;
1907
1908         // Will contain the label type.
1909         docstring name;
1910
1911         // For section, subsection, etc...
1912         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1913                 Layout_ptr const & layout2 = pars_[pit - 1].layout();
1914                 if (layout2->latextype != LATEX_PARAGRAPH) {
1915                         --pit;
1916                         layout = layout2;
1917                 }
1918         }
1919         if (layout->latextype != LATEX_PARAGRAPH)
1920                 name = from_ascii(layout->latexname());
1921
1922         // for captions, we just take the caption type
1923         Inset * caption_inset = cur.innerInsetOfType(Inset::CAPTION_CODE);
1924         if (caption_inset)
1925                 name = from_ascii(static_cast<InsetCaption *>(caption_inset)->type());
1926
1927         // If none of the above worked, we'll see if we're inside various
1928         // types of insets and take our abbreviation from them.
1929         if (name.empty()) {
1930                 Inset::Code const codes[] = {
1931                         Inset::FLOAT_CODE,
1932                         Inset::WRAP_CODE,
1933                         Inset::FOOT_CODE
1934                 };
1935                 for (unsigned int i = 0; i < (sizeof codes / sizeof codes[0]); ++i) {
1936                         Inset * float_inset = cur.innerInsetOfType(codes[i]);
1937                         if (float_inset) {
1938                                 name = float_inset->name();
1939                                 break;
1940                         }
1941                 }
1942         }
1943
1944         // Create a correct prefix for prettyref
1945         if (name == "theorem")
1946                 name = from_ascii("thm");
1947         else if (name == "Foot")
1948                 name = from_ascii("fn");
1949         else if (name == "listing")
1950                 name = from_ascii("lst");
1951
1952         if (!name.empty())
1953                 text = name.substr(0, 3) + ':' + text;
1954
1955         return text;
1956 }
1957
1958
1959 void Text::setCursorFromCoordinates(Cursor & cur, int const x, int const y)
1960 {
1961         BOOST_ASSERT(this == cur.text());
1962         pit_type pit = getPitNearY(cur.bv(), y);
1963
1964         TextMetrics const & tm = cur.bv().textMetrics(this);
1965         ParagraphMetrics const & pm = tm.parMetrics(pit);
1966
1967         int yy = cur.bv().coordCache().get(this, pit).y_ - pm.ascent();
1968         LYXERR(Debug::DEBUG)
1969                 << BOOST_CURRENT_FUNCTION
1970                 << ": x: " << x
1971                 << " y: " << y
1972                 << " pit: " << pit
1973                 << " yy: " << yy << endl;
1974
1975         int r = 0;
1976         BOOST_ASSERT(pm.rows().size());
1977         for (; r < int(pm.rows().size()) - 1; ++r) {
1978                 Row const & row = pm.rows()[r];
1979                 if (int(yy + row.height()) > y)
1980                         break;
1981                 yy += row.height();
1982         }
1983
1984         Row const & row = pm.rows()[r];
1985
1986         LYXERR(Debug::DEBUG)
1987                 << BOOST_CURRENT_FUNCTION
1988                 << ": row " << r
1989                 << " from pos: " << row.pos()
1990                 << endl;
1991
1992         bool bound = false;
1993         int xx = x;
1994         pos_type const pos = row.pos()
1995                 + tm.getColumnNearX(pit, row, xx, bound);
1996
1997         LYXERR(Debug::DEBUG)
1998                 << BOOST_CURRENT_FUNCTION
1999                 << ": setting cursor pit: " << pit
2000                 << " pos: " << pos
2001                 << endl;
2002
2003         setCursor(cur, pit, pos, true, bound);
2004         // remember new position.
2005         cur.setTargetX();
2006 }
2007
2008
2009 void Text::charsTranspose(Cursor & cur)
2010 {
2011         BOOST_ASSERT(this == cur.text());
2012
2013         pos_type pos = cur.pos();
2014
2015         // If cursor is at beginning or end of paragraph, do nothing.
2016         if (pos == cur.lastpos() || pos == 0)
2017                 return;
2018
2019         Paragraph & par = cur.paragraph();
2020
2021         // Get the positions of the characters to be transposed.
2022         pos_type pos1 = pos - 1;
2023         pos_type pos2 = pos;
2024
2025         // In change tracking mode, ignore deleted characters.
2026         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
2027                 ++pos2;
2028         if (pos2 == cur.lastpos())
2029                 return;
2030
2031         while (pos1 >= 0 && par.isDeleted(pos1))
2032                 --pos1;
2033         if (pos1 < 0)
2034                 return;
2035
2036         // Don't do anything if one of the "characters" is not regular text.
2037         if (par.isInset(pos1) || par.isInset(pos2))
2038                 return;
2039
2040         // Store the characters to be transposed (including font information).
2041         char_type char1 = par.getChar(pos1);
2042         Font const font1 =
2043                 par.getFontSettings(cur.buffer().params(), pos1);
2044
2045         char_type char2 = par.getChar(pos2);
2046         Font const font2 =
2047                 par.getFontSettings(cur.buffer().params(), pos2);
2048
2049         // And finally, we are ready to perform the transposition.
2050         // Track the changes if Change Tracking is enabled.
2051         bool const trackChanges = cur.buffer().params().trackChanges;
2052
2053         recordUndo(cur);
2054
2055         par.eraseChar(pos2, trackChanges);
2056         par.eraseChar(pos1, trackChanges);
2057         par.insertChar(pos1, char2, font2, trackChanges);
2058         par.insertChar(pos2, char1, font1, trackChanges);
2059
2060         checkBufferStructure(cur.buffer(), cur);
2061
2062         // After the transposition, move cursor to after the transposition.
2063         setCursor(cur, cur.pit(), pos2);
2064         cur.forwardPos();
2065 }
2066
2067
2068 } // namespace lyx