src/text.C

   1 /**
   2  * \file src/text.C
   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 Jean-Marc Lasgouttes
   9  * \author John Levon
  10  * \author André Pönitz
  11  * \author Dekel Tsur
  12  * \author Jürgen Vigna
  13  *
  14  * Full author contact details are available in file CREDITS.
  15  */
  16
  17 #include <config.h>
  18
  19 #include "lyxtext.h"
  20
  21 #include "author.h"
  22 #include "buffer.h"
  23 #include "buffer_funcs.h"
  24 #include "bufferparams.h"
  25 #include "BufferView.h"
  26 #include "cursor.h"
  27 #include "coordcache.h"
  28 #include "CutAndPaste.h"
  29 #include "debug.h"
  30 #include "dispatchresult.h"
  31 #include "encoding.h"
  32 #include "errorlist.h"
  33 #include "funcrequest.h"
  34 #include "factory.h"
  35 #include "FontIterator.h"
  36 #include "gettext.h"
  37 #include "language.h"
  38 #include "LColor.h"
  39 #include "lyxlength.h"
  40 #include "lyxlex.h"
  41 #include "lyxrc.h"
  42 #include "lyxrow.h"
  43 #include "lyxrow_funcs.h"
  44 #include "metricsinfo.h"
  45 #include "paragraph.h"
  46 #include "paragraph_funcs.h"
  47 #include "ParagraphParameters.h"
  48 #include "rowpainter.h"
  49 #include "undo.h"
  50 #include "vspace.h"
  51 #include "WordLangTuple.h"
  52
  53 #include "frontends/font_metrics.h"
  54 #include "frontends/LyXView.h"
  55 #include "frontends/Painter.h"
  56
  57 #include "insets/insettext.h"
  58 #include "insets/insetbibitem.h"
  59 #include "insets/insethfill.h"
  60 #include "insets/insetlatexaccent.h"
  61 #include "insets/insetline.h"
  62 #include "insets/insetnewline.h"
  63 #include "insets/insetpagebreak.h"
  64 #include "insets/insetoptarg.h"
  65 #include "insets/insetspace.h"
  66 #include "insets/insetspecialchar.h"
  67 #include "insets/insettabular.h"
  68
  69 #include "support/lstrings.h"
  70 #include "support/textutils.h"
  71 #include "support/convert.h"
  72
  73 #include <boost/current_function.hpp>
  74
  75 #include <sstream>
  76
  77 using lyx::pit_type;
  78 using lyx::pos_type;
  79 using lyx::word_location;
  80
  81 using lyx::support::bformat;
  82 using lyx::support::contains;
  83 using lyx::support::lowercase;
  84 using lyx::support::split;
  85 using lyx::support::uppercase;
  86
  87 using lyx::cap::cutSelection;
  88
  89 using std::auto_ptr;
  90 using std::advance;
  91 using std::distance;
  92 using std::max;
  93 using std::min;
  94 using std::endl;
  95 using std::string;
  96
  97
  98 namespace {
  99
 100 int numberOfSeparators(Paragraph const & par, Row const & row)
 101 {
 102         pos_type const first = max(row.pos(), par.beginOfBody());
 103         pos_type const last = row.endpos() - 1;
 104         int n = 0;
 105         for (pos_type p = first; p < last; ++p) {
 106                 if (par.isSeparator(p))
 107                         ++n;
 108         }
 109         return n;
 110 }
 111
 112
 113 int numberOfLabelHfills(Paragraph const & par, Row const & row)
 114 {
 115         pos_type last = row.endpos() - 1;
 116         pos_type first = row.pos();
 117
 118         // hfill *DO* count at the beginning of paragraphs!
 119         if (first) {
 120                 while (first < last && par.isHfill(first))
 121                         ++first;
 122         }
 123
 124         last = min(last, par.beginOfBody());
 125         int n = 0;
 126         for (pos_type p = first; p < last; ++p) {
 127                 if (par.isHfill(p))
 128                         ++n;
 129         }
 130         return n;
 131 }
 132
 133
 134 int numberOfHfills(Paragraph const & par, Row const & row)
 135 {
 136         pos_type const last = row.endpos() - 1;
 137         pos_type first = row.pos();
 138
 139         // hfill *DO* count at the beginning of paragraphs!
 140         if (first) {
 141                 while (first < last && par.isHfill(first))
 142                         ++first;
 143         }
 144
 145         first = max(first, par.beginOfBody());
 146
 147         int n = 0;
 148         for (pos_type p = first; p < last; ++p) {
 149                 if (par.isHfill(p))
 150                         ++n;
 151         }
 152         return n;
 153 }
 154
 155
 156 void readParToken(Buffer const & buf, Paragraph & par, LyXLex & lex,
 157         string const & token, LyXFont & font, Change & change)
 158 {
 159         BufferParams const & bp = buf.params();
 160
 161         if (token[0] != '\\') {
 162                 string::const_iterator cit = token.begin();
 163                 for (; cit != token.end(); ++cit)
 164                         par.insertChar(par.size(), (*cit), font, change);
 165         } else if (token == "\\begin_layout") {
 166                 lex.eatLine();
 167                 string layoutname = lex.getString();
 168
 169                 font = LyXFont(LyXFont::ALL_INHERIT, bp.language);
 170                 change = Change();
 171
 172                 LyXTextClass const & tclass = bp.getLyXTextClass();
 173
 174                 if (layoutname.empty()) {
 175                         layoutname = tclass.defaultLayoutName();
 176                 }
 177
 178                 bool hasLayout = tclass.hasLayout(layoutname);
 179
 180                 if (!hasLayout) {
 181                         buf.error(ErrorItem(_("Unknown layout"),
 182                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 183                                 layoutname, tclass.name()), par.id(), 0, par.size()));
 184                         layoutname = tclass.defaultLayoutName();
 185                 }
 186
 187                 par.layout(bp.getLyXTextClass()[layoutname]);
 188
 189                 // Test whether the layout is obsolete.
 190                 LyXLayout_ptr const & layout = par.layout();
 191                 if (!layout->obsoleted_by().empty())
 192                         par.layout(bp.getLyXTextClass()[layout->obsoleted_by()]);
 193
 194                 par.params().read(lex);
 195
 196         } else if (token == "\\end_layout") {
 197                 lyxerr << BOOST_CURRENT_FUNCTION
 198                        << ": Solitary \\end_layout in line "
 199                        << lex.getLineNo() << "\n"
 200                        << "Missing \\begin_layout?.\n";
 201         } else if (token == "\\end_inset") {
 202                 lyxerr << BOOST_CURRENT_FUNCTION
 203                        << ": Solitary \\end_inset in line "
 204                        << lex.getLineNo() << "\n"
 205                        << "Missing \\begin_inset?.\n";
 206         } else if (token == "\\begin_inset") {
 207                 InsetBase * inset = readInset(lex, buf);
 208                 if (inset)
 209                         par.insertInset(par.size(), inset, font, change);
 210                 else {
 211                         lex.eatLine();
 212                         string line = lex.getString();
 213                         buf.error(ErrorItem(_("Unknown Inset"), line,
 214                                             par.id(), 0, par.size()));
 215                 }
 216         } else if (token == "\\family") {
 217                 lex.next();
 218                 font.setLyXFamily(lex.getString());
 219         } else if (token == "\\series") {
 220                 lex.next();
 221                 font.setLyXSeries(lex.getString());
 222         } else if (token == "\\shape") {
 223                 lex.next();
 224                 font.setLyXShape(lex.getString());
 225         } else if (token == "\\size") {
 226                 lex.next();
 227                 font.setLyXSize(lex.getString());
 228         } else if (token == "\\lang") {
 229                 lex.next();
 230                 string const tok = lex.getString();
 231                 Language const * lang = languages.getLanguage(tok);
 232                 if (lang) {
 233                         font.setLanguage(lang);
 234                 } else {
 235                         font.setLanguage(bp.language);
 236                         lex.printError("Unknown language `$$Token'");
 237                 }
 238         } else if (token == "\\numeric") {
 239                 lex.next();
 240                 font.setNumber(font.setLyXMisc(lex.getString()));
 241         } else if (token == "\\emph") {
 242                 lex.next();
 243                 font.setEmph(font.setLyXMisc(lex.getString()));
 244         } else if (token == "\\bar") {
 245                 lex.next();
 246                 string const tok = lex.getString();
 247
 248                 if (tok == "under")
 249                         font.setUnderbar(LyXFont::ON);
 250                 else if (tok == "no")
 251                         font.setUnderbar(LyXFont::OFF);
 252                 else if (tok == "default")
 253                         font.setUnderbar(LyXFont::INHERIT);
 254                 else
 255                         lex.printError("Unknown bar font flag "
 256                                        "`$$Token'");
 257         } else if (token == "\\noun") {
 258                 lex.next();
 259                 font.setNoun(font.setLyXMisc(lex.getString()));
 260         } else if (token == "\\color") {
 261                 lex.next();
 262                 font.setLyXColor(lex.getString());
 263         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 264
 265                 // Insets don't make sense in a free-spacing context! ---Kayvan
 266                 if (par.isFreeSpacing()) {
 267                         if (token == "\\InsetSpace")
 268                                 par.insertChar(par.size(), ' ', font, change);
 269                         else if (lex.isOK()) {
 270                                 lex.next();
 271                                 string const next_token = lex.getString();
 272                                 if (next_token == "\\-")
 273                                         par.insertChar(par.size(), '-', font, change);
 274                                 else {
 275                                         lex.printError("Token `$$Token' "
 276                                                        "is in free space "
 277                                                        "paragraph layout!");
 278                                 }
 279                         }
 280                 } else {
 281                         auto_ptr<InsetBase> inset;
 282                         if (token == "\\SpecialChar" )
 283                                 inset.reset(new InsetSpecialChar);
 284                         else
 285                                 inset.reset(new InsetSpace);
 286                         inset->read(buf, lex);
 287                         par.insertInset(par.size(), inset.release(),
 288                                         font, change);
 289                 }
 290         } else if (token == "\\i") {
 291                 auto_ptr<InsetBase> inset(new InsetLatexAccent);
 292                 inset->read(buf, lex);
 293                 par.insertInset(par.size(), inset.release(), font, change);
 294         } else if (token == "\\backslash") {
 295                 par.insertChar(par.size(), '\\', font, change);
 296         } else if (token == "\\newline") {
 297                 auto_ptr<InsetBase> inset(new InsetNewline);
 298                 inset->read(buf, lex);
 299                 par.insertInset(par.size(), inset.release(), font, change);
 300         } else if (token == "\\LyXTable") {
 301                 auto_ptr<InsetBase> inset(new InsetTabular(buf));
 302                 inset->read(buf, lex);
 303                 par.insertInset(par.size(), inset.release(), font, change);
 304         } else if (token == "\\bibitem") {
 305                 InsetCommandParams p("bibitem", "dummy");
 306                 auto_ptr<InsetBibitem> inset(new InsetBibitem(p));
 307                 inset->read(buf, lex);
 308                 par.insertInset(par.size(), inset.release(), font, change);
 309         } else if (token == "\\hfill") {
 310                 par.insertInset(par.size(), new InsetHFill, font, change);
 311         } else if (token == "\\lyxline") {
 312                 par.insertInset(par.size(), new InsetLine, font, change);
 313         } else if (token == "\\newpage") {
 314                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 315         } else if (token == "\\change_unchanged") {
 316                 // Hack ! Needed for empty paragraphs :/
 317                 // FIXME: is it still ??
 318                 if (!par.size())
 319                         par.cleanChanges();
 320                 change = Change(Change::UNCHANGED);
 321         } else if (token == "\\change_inserted") {
 322                 lex.eatLine();
 323                 std::istringstream is(lex.getString());
 324                 int aid;
 325                 lyx::time_type ct;
 326                 is >> aid >> ct;
 327                 change = Change(Change::INSERTED, bp.author_map[aid], ct);
 328         } else if (token == "\\change_deleted") {
 329                 lex.eatLine();
 330                 std::istringstream is(lex.getString());
 331                 int aid;
 332                 lyx::time_type ct;
 333                 is >> aid >> ct;
 334                 change = Change(Change::DELETED, bp.author_map[aid], ct);
 335         } else {
 336                 lex.eatLine();
 337                 buf.error(ErrorItem(_("Unknown token"),
 338                         bformat(_("Unknown token: %1$s %2$s\n"), token, lex.getString()),
 339                         par.id(), 0, par.size()));
 340         }
 341 }
 342
 343
 344 void readParagraph(Buffer const & buf, Paragraph & par, LyXLex & lex)
 345 {
 346         lex.nextToken();
 347         string token = lex.getString();
 348         LyXFont font;
 349         Change change;
 350
 351         while (lex.isOK()) {
 352
 353                 readParToken(buf, par, lex, token, font, change);
 354
 355                 lex.nextToken();
 356                 token = lex.getString();
 357
 358                 if (token.empty())
 359                         continue;
 360
 361                 if (token == "\\end_layout") {
 362                         //Ok, paragraph finished
 363                         break;
 364                 }
 365
 366                 lyxerr[Debug::PARSER] << "Handling paragraph token: `"
 367                                       << token << '\'' << endl;
 368                 if (token == "\\begin_layout" || token == "\\end_document"
 369                     || token == "\\end_inset" || token == "\\begin_deeper"
 370                     || token == "\\end_deeper") {
 371                         lex.pushToken(token);
 372                         lyxerr << "Paragraph ended in line "
 373                                << lex.getLineNo() << "\n"
 374                                << "Missing \\end_layout.\n";
 375                         break;
 376                 }
 377         }
 378         // Initialize begin_of_body_ on load; redoParagraph maintains
 379         par.setBeginOfBody();
 380 }
 381
 382
 383 } // namespace anon
 384
 385
 386
 387 BufferView * LyXText::bv() const
 388 {
 389         BOOST_ASSERT(bv_owner != 0);
 390         return bv_owner;
 391 }
 392
 393
 394 double LyXText::spacing(Paragraph const & par) const
 395 {
 396         if (par.params().spacing().isDefault())
 397                 return bv()->buffer()->params().spacing().getValue();
 398         return par.params().spacing().getValue();
 399 }
 400
 401
 402 int LyXText::width() const
 403 {
 404         return dim_.wid;
 405 }
 406
 407
 408 int LyXText::height() const
 409 {
 410         return dim_.height();
 411 }
 412
 413
 414 int LyXText::singleWidth(Paragraph const & par, pos_type pos) const
 415 {
 416         return singleWidth(par, pos, par.getChar(pos), getFont(par, pos));
 417 }
 418
 419
 420 int LyXText::singleWidth(Paragraph const & par,
 421                          pos_type pos, char c, LyXFont const & font) const
 422 {
 423         // The most common case is handled first (Asger)
 424         if (IsPrintable(c)) {
 425                 Language const * language = font.language();
 426                 if (language->RightToLeft()) {
 427                         if ((lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 428                              lyxrc.font_norm_type == LyXRC::ISO_10646_1)
 429                             && language->lang() == "arabic") {
 430                                 if (Encodings::IsComposeChar_arabic(c))
 431                                         return 0;
 432                                 c = par.transformChar(c, pos);
 433                         } else if (language->lang() == "hebrew" &&
 434                                    Encodings::IsComposeChar_hebrew(c))
 435                                 return 0;
 436                 }
 437                 return font_metrics::width(c, font);
 438         }
 439
 440         if (c == Paragraph::META_INSET)
 441                 return par.getInset(pos)->width();
 442
 443         return font_metrics::width(c, font);
 444 }
 445
 446
 447 int LyXText::leftMargin(pit_type pit) const
 448 {
 449         BOOST_ASSERT(pit >= 0);
 450         BOOST_ASSERT(pit < int(pars_.size()));
 451         return leftMargin(pit, pars_[pit].size());
 452 }
 453
 454
 455 int LyXText::leftMargin(pit_type const pit, pos_type const pos) const
 456 {
 457         BOOST_ASSERT(pit >= 0);
 458         BOOST_ASSERT(pit < int(pars_.size()));
 459         Paragraph const & par = pars_[pit];
 460         BOOST_ASSERT(pos >= 0);
 461         BOOST_ASSERT(pos <= par.size());
 462         //lyxerr << "LyXText::leftMargin: pit: " << pit << " pos: " << pos << endl;
 463         LyXTextClass const & tclass =
 464                 bv()->buffer()->params().getLyXTextClass();
 465         LyXLayout_ptr const & layout = par.layout();
 466
 467         string parindent = layout->parindent;
 468
 469         int l_margin = 0;
 470
 471         if (isMainText())
 472                 l_margin += changebarMargin();
 473
 474         l_margin += font_metrics::signedWidth(tclass.leftmargin(), tclass.defaultfont());
 475
 476         if (par.getDepth() != 0) {
 477         // find the next level paragraph
 478         pit_type newpar = outerHook(pit, pars_);
 479                 if (newpar != pit_type(pars_.size())) {
 480                         if (pars_[newpar].layout()->isEnvironment()) {
 481                                 l_margin = leftMargin(newpar);
 482                         }
 483                         if (par.layout() == tclass.defaultLayout()) {
 484                                 if (pars_[newpar].params().noindent())
 485                                         parindent.erase();
 486                                 else
 487                                         parindent = pars_[newpar].layout()->parindent;
 488                         }
 489                 }
 490         }
 491
 492         LyXFont const labelfont = getLabelFont(par);
 493         switch (layout->margintype) {
 494         case MARGIN_DYNAMIC:
 495                 if (!layout->leftmargin.empty())
 496                         l_margin += font_metrics::signedWidth(layout->leftmargin,
 497                                                   tclass.defaultfont());
 498                 if (!par.getLabelstring().empty()) {
 499                         l_margin += font_metrics::signedWidth(layout->labelindent,
 500                                                   labelfont);
 501                         l_margin += font_metrics::width(par.getLabelstring(),
 502                                             labelfont);
 503                         l_margin += font_metrics::width(layout->labelsep, labelfont);
 504                 }
 505                 break;
 506
 507         case MARGIN_MANUAL:
 508                 l_margin += font_metrics::signedWidth(layout->labelindent, labelfont);
 509                 // The width of an empty par, even with manual label, should be 0
 510                 if (!par.empty() && pos >= par.beginOfBody()) {
 511                         if (!par.getLabelWidthString().empty()) {
 512                                 l_margin += font_metrics::width(par.getLabelWidthString(),
 513                                                labelfont);
 514                                 l_margin += font_metrics::width(layout->labelsep, labelfont);
 515                         }
 516                 }
 517                 break;
 518
 519         case MARGIN_STATIC:
 520                 l_margin += font_metrics::signedWidth(layout->leftmargin, tclass.defaultfont()) * 4
 521                         / (par.getDepth() + 4);
 522                 break;
 523
 524         case MARGIN_FIRST_DYNAMIC:
 525                 if (layout->labeltype == LABEL_MANUAL) {
 526                         if (pos >= par.beginOfBody()) {
 527                                 l_margin += font_metrics::signedWidth(layout->leftmargin,
 528                                                           labelfont);
 529                         } else {
 530                                 l_margin += font_metrics::signedWidth(layout->labelindent,
 531                                                           labelfont);
 532                         }
 533                 } else if (pos != 0
 534                            // Special case to fix problems with
 535                            // theorems (JMarc)
 536                            || (layout->labeltype == LABEL_STATIC
 537                                && layout->latextype == LATEX_ENVIRONMENT
 538                                && !isFirstInSequence(pit, pars_))) {
 539                         l_margin += font_metrics::signedWidth(layout->leftmargin,
 540                                                   labelfont);
 541                 } else if (layout->labeltype != LABEL_TOP_ENVIRONMENT
 542                            && layout->labeltype != LABEL_BIBLIO
 543                            && layout->labeltype !=
 544                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 545                         l_margin += font_metrics::signedWidth(layout->labelindent,
 546                                                   labelfont);
 547                         l_margin += font_metrics::width(layout->labelsep, labelfont);
 548                         l_margin += font_metrics::width(par.getLabelstring(),
 549                                             labelfont);
 550                 }
 551                 break;
 552
 553         case MARGIN_RIGHT_ADDRESS_BOX: {
 554 #if 0
 555                 // ok, a terrible hack. The left margin depends on the widest
 556                 // row in this paragraph.
 557                 RowList::iterator rit = par.rows().begin();
 558                 RowList::iterator end = par.rows().end();
 559 #ifdef WITH_WARNINGS
 560 #warning This is wrong.
 561 #endif
 562                 int minfill = maxwidth_;
 563                 for ( ; rit != end; ++rit)
 564                         if (rit->fill() < minfill)
 565                                 minfill = rit->fill();
 566                 l_margin += font_metrics::signedWidth(layout->leftmargin,
 567                         tclass.defaultfont());
 568                 l_margin += minfill;
 569 #endif
 570                 // also wrong, but much shorter.
 571                 l_margin += maxwidth_ / 2;
 572                 break;
 573         }
 574         }
 575
 576         if (!par.params().leftIndent().zero())
 577                 l_margin += par.params().leftIndent().inPixels(maxwidth_);
 578
 579         LyXAlignment align;
 580
 581         if (par.params().align() == LYX_ALIGN_LAYOUT)
 582                 align = layout->align;
 583         else
 584                 align = par.params().align();
 585
 586         // set the correct parindent
 587         if (pos == 0
 588             && (layout->labeltype == LABEL_NO_LABEL
 589                || layout->labeltype == LABEL_TOP_ENVIRONMENT
 590                || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 591                || (layout->labeltype == LABEL_STATIC
 592                    && layout->latextype == LATEX_ENVIRONMENT
 593                    && !isFirstInSequence(pit, pars_)))
 594             && align == LYX_ALIGN_BLOCK
 595             && !par.params().noindent()
 596             // in some insets, paragraphs are never indented
 597             && !(par.inInset() && par.inInset()->neverIndent())
 598             // display style insets are always centered, omit indentation
 599             && !(!par.empty()
 600                     && par.isInset(pos)
 601                     && par.getInset(pos)->display())
 602             && (par.layout() != tclass.defaultLayout()
 603                 || bv()->buffer()->params().paragraph_separation ==
 604                    BufferParams::PARSEP_INDENT))
 605         {
 606                 l_margin += font_metrics::signedWidth(parindent, tclass.defaultfont());
 607         }
 608
 609         return l_margin;
 610 }
 611
 612
 613 int LyXText::rightMargin(Paragraph const & par) const
 614 {
 615         // We do not want rightmargins on inner texts.
 616         if (bv()->text() != this)
 617                 return 0;
 618
 619         LyXTextClass const & tclass = bv()->buffer()->params().getLyXTextClass();
 620         int const r_margin =
 621                 ::rightMargin()
 622                 + font_metrics::signedWidth(tclass.rightmargin(),
 623                                             tclass.defaultfont())
 624                 + font_metrics::signedWidth(par.layout()->rightmargin,
 625                                             tclass.defaultfont())
 626                 * 4 / (par.getDepth() + 4);
 627
 628         return r_margin;
 629 }
 630
 631
 632 int LyXText::labelEnd(pit_type const pit) const
 633 {
 634         // labelEnd is only needed if the layout fills a flushleft label.
 635         if (pars_[pit].layout()->margintype != MARGIN_MANUAL)
 636                 return 0;
 637         // return the beginning of the body
 638         return leftMargin(pit);
 639 }
 640
 641
 642 namespace {
 643
 644 // this needs special handling - only newlines count as a break point
 645 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
 646 {
 647         pos_type const end = par.size();
 648
 649         for (; i < end; ++i)
 650                 if (par.isNewline(i))
 651                         return i + 1;
 652
 653         return end;
 654 }
 655
 656 };
 657
 658
 659 void LyXText::rowBreakPoint(pit_type const pit, Row & row) const
 660 {
 661         Paragraph const & par = pars_[pit];
 662         pos_type const end = par.size();
 663         pos_type const pos = row.pos();
 664         if (pos == end) {
 665                 row.endpos(end);
 666                 return;
 667         }
 668
 669         // maximum pixel width of a row
 670         int width = maxwidth_ - rightMargin(par); // - leftMargin(pit, row);
 671         if (width < 0) {
 672                 row.endpos(end);
 673                 return;
 674         }
 675
 676         LyXLayout_ptr const & layout = par.layout();
 677
 678         if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX) {
 679                 row.endpos(addressBreakPoint(pos, par));
 680                 return;
 681         }
 682
 683         pos_type const body_pos = par.beginOfBody();
 684
 685
 686         // Now we iterate through until we reach the right margin
 687         // or the end of the par, then choose the possible break
 688         // nearest that.
 689
 690         int const left = leftMargin(pit, pos);
 691         int x = left;
 692
 693         // pixel width since last breakpoint
 694         int chunkwidth = 0;
 695
 696         FontIterator fi = FontIterator(*this, par, pos);
 697         pos_type point = end;
 698         pos_type i = pos;
 699         for ( ; i < end; ++i, ++fi) {
 700                 char const c = par.getChar(i);
 701                 int thiswidth = singleWidth(par, i, c, *fi);
 702
 703                 // add the auto-hfill from label end to the body
 704                 if (body_pos && i == body_pos) {
 705                         int add = font_metrics::width(layout->labelsep, getLabelFont(par));
 706                         if (par.isLineSeparator(i - 1))
 707                                 add -= singleWidth(par, i - 1);
 708
 709                         add = std::max(add, labelEnd(pit) - x);
 710                         thiswidth += add;
 711                 }
 712
 713                 x += thiswidth;
 714                 chunkwidth += thiswidth;
 715
 716                 // break before a character that will fall off
 717                 // the right of the row
 718                 if (x >= width) {
 719                         // if no break before, break here
 720                         if (point == end || chunkwidth >= width - left) {
 721                                 if (i > pos)
 722                                         point = i;
 723                                 else
 724                                         point = i + 1;
 725
 726                         }
 727                         // exit on last registered breakpoint:
 728                         break;
 729                 }
 730
 731                 if (par.isNewline(i)) {
 732                         point = i + 1;
 733                         break;
 734                 }
 735                 // Break before...
 736                 if (i + 1 < end) {
 737                         if (par.isInset(i + 1) && par.getInset(i + 1)->display()) {
 738                                 point = i + 1;
 739                                 break;
 740                         }
 741                         // ...and after.
 742                         if (par.isInset(i) && par.getInset(i)->display()) {
 743                                 point = i + 1;
 744                                 break;
 745                         }
 746                 }
 747
 748                 if (!par.isInset(i) || par.getInset(i)->isChar()) {
 749                         // some insets are line separators too
 750                         if (par.isLineSeparator(i)) {
 751                                 // register breakpoint:
 752                                 point = i + 1;
 753                                 chunkwidth = 0;
 754                         }
 755                 }
 756         }
 757
 758         // maybe found one, but the par is short enough.
 759         if (i == end && x < width)
 760                 point = end;
 761
 762         // manual labels cannot be broken in LaTeX. But we
 763         // want to make our on-screen rendering of footnotes
 764         // etc. still break
 765         if (body_pos && point < body_pos)
 766                 point = body_pos;
 767
 768         row.endpos(point);
 769 }
 770
 771
 772 void LyXText::setRowWidth(pit_type const pit, Row & row) const
 773 {
 774         // get the pure distance
 775         pos_type const end = row.endpos();
 776
 777         Paragraph const & par = pars_[pit];
 778         string const & labelsep = par.layout()->labelsep;
 779         int w = leftMargin(pit, row.pos());
 780
 781         pos_type const body_pos = par.beginOfBody();
 782         pos_type i = row.pos();
 783
 784         if (i < end) {
 785                 FontIterator fi = FontIterator(*this, par, i);
 786                 for ( ; i < end; ++i, ++fi) {
 787                         if (body_pos > 0 && i == body_pos) {
 788                                 w += font_metrics::width(labelsep, getLabelFont(par));
 789                                 if (par.isLineSeparator(i - 1))
 790                                         w -= singleWidth(par, i - 1);
 791                                 w = max(w, labelEnd(pit));
 792                         }
 793                         char const c = par.getChar(i);
 794                         w += singleWidth(par, i, c, *fi);
 795                 }
 796         }
 797
 798         if (body_pos > 0 && body_pos >= end) {
 799                 w += font_metrics::width(labelsep, getLabelFont(par));
 800                 if (end > 0 && par.isLineSeparator(end - 1))
 801                         w -= singleWidth(par, end - 1);
 802                 w = max(w, labelEnd(pit));
 803         }
 804
 805         row.width(w + rightMargin(par));
 806 }
 807
 808
 809 // returns the minimum space a manual label needs on the screen in pixel
 810 int LyXText::labelFill(Paragraph const & par, Row const & row) const
 811 {
 812         pos_type last = par.beginOfBody();
 813
 814         BOOST_ASSERT(last > 0);
 815
 816         // -1 because a label ends with a space that is in the label
 817         --last;
 818
 819         // a separator at this end does not count
 820         if (par.isLineSeparator(last))
 821                 --last;
 822
 823         int w = 0;
 824         for (pos_type i = row.pos(); i <= last; ++i)
 825                 w += singleWidth(par, i);
 826
 827         string const & label = par.params().labelWidthString();
 828         if (label.empty())
 829                 return 0;
 830
 831         return max(0, font_metrics::width(label, getLabelFont(par)) - w);
 832 }
 833
 834
 835 LColor_color LyXText::backgroundColor() const
 836 {
 837         return LColor_color(LColor::color(background_color_));
 838 }
 839
 840
 841 void LyXText::setHeightOfRow(pit_type const pit, Row & row)
 842 {
 843         Paragraph const & par = pars_[pit];
 844         // get the maximum ascent and the maximum descent
 845         double layoutasc = 0;
 846         double layoutdesc = 0;
 847         double const dh = defaultRowHeight();
 848
 849         // ok, let us initialize the maxasc and maxdesc value.
 850         // Only the fontsize count. The other properties
 851         // are taken from the layoutfont. Nicer on the screen :)
 852         LyXLayout_ptr const & layout = par.layout();
 853
 854         // as max get the first character of this row then it can
 855         // increase but not decrease the height. Just some point to
 856         // start with so we don't have to do the assignment below too
 857         // often.
 858         LyXFont font = getFont(par, row.pos());
 859         LyXFont::FONT_SIZE const tmpsize = font.size();
 860         font = getLayoutFont(pit);
 861         LyXFont::FONT_SIZE const size = font.size();
 862         font.setSize(tmpsize);
 863
 864         LyXFont labelfont = getLabelFont(par);
 865
 866         // these are minimum values
 867         double const spacing_val = layout->spacing.getValue() * spacing(par);
 868         //lyxerr << "spacing_val = " << spacing_val << endl;
 869         int maxasc  = int(font_metrics::maxAscent(font)  * spacing_val);
 870         int maxdesc = int(font_metrics::maxDescent(font) * spacing_val);
 871
 872         // insets may be taller
 873         InsetList::const_iterator ii = par.insetlist.begin();
 874         InsetList::const_iterator iend = par.insetlist.end();
 875         for ( ; ii != iend; ++ii) {
 876                 if (ii->pos >= row.pos() && ii->pos < row.endpos()) {
 877                         maxasc  = max(maxasc,  ii->inset->ascent());
 878                         maxdesc = max(maxdesc, ii->inset->descent());
 879                 }
 880         }
 881
 882         // Check if any custom fonts are larger (Asger)
 883         // This is not completely correct, but we can live with the small,
 884         // cosmetic error for now.
 885         int labeladdon = 0;
 886         pos_type const pos_end = row.endpos();
 887
 888         LyXFont::FONT_SIZE maxsize =
 889                 par.highestFontInRange(row.pos(), pos_end, size);
 890         if (maxsize > font.size()) {
 891                 font.setSize(maxsize);
 892                 maxasc  = max(maxasc,  font_metrics::maxAscent(font));
 893                 maxdesc = max(maxdesc, font_metrics::maxDescent(font));
 894         }
 895
 896         // This is nicer with box insets:
 897         ++maxasc;
 898         ++maxdesc;
 899
 900         row.ascent(maxasc);
 901
 902         // is it a top line?
 903         if (row.pos() == 0) {
 904                 BufferParams const & bufparams = bv()->buffer()->params();
 905                 // some parksips VERY EASY IMPLEMENTATION
 906                 if (bv()->buffer()->params().paragraph_separation
 907                     == BufferParams::PARSEP_SKIP
 908                         && pit != 0
 909                         && ((layout->isParagraph() && par.getDepth() == 0)
 910                             || (pars_[pit - 1].layout()->isParagraph()
 911                                 && pars_[pit - 1].getDepth() == 0)))
 912                 {
 913                                 maxasc += bufparams.getDefSkip().inPixels(*bv());
 914                 }
 915
 916                 if (par.params().startOfAppendix())
 917                         maxasc += int(3 * dh);
 918
 919                 // This is special code for the chapter, since the label of this
 920                 // layout is printed in an extra row
 921                 if (layout->counter == "chapter"
 922                     && !par.params().labelString().empty()) {
 923                         labeladdon = int(font_metrics::maxHeight(labelfont)
 924                                      * layout->spacing.getValue()
 925                                      * spacing(par));
 926                 }
 927
 928                 // special code for the top label
 929                 if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
 930                      || layout->labeltype == LABEL_BIBLIO
 931                      || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
 932                     && isFirstInSequence(pit, paragraphs())
 933                     && !par.getLabelstring().empty())
 934                 {
 935                         labeladdon = int(
 936                                   font_metrics::maxHeight(labelfont)
 937                                         * layout->spacing.getValue()
 938                                         * spacing(par)
 939                                 + (layout->topsep + layout->labelbottomsep) * dh);
 940                 }
 941
 942                 // Add the layout spaces, for example before and after
 943                 // a section, or between the items of a itemize or enumerate
 944                 // environment.
 945
 946                 pit_type prev = depthHook(pit, pars_, par.getDepth());
 947                 if (prev != pit
 948                     && pars_[prev].layout() == layout
 949                     && pars_[prev].getDepth() == par.getDepth()
 950                     && pars_[prev].getLabelWidthString() == par.getLabelWidthString())
 951                 {
 952                         layoutasc = layout->itemsep * dh;
 953                 } else if (pit != 0 || row.pos() != 0) {
 954                         if (layout->topsep > 0)
 955                                 layoutasc = layout->topsep * dh;
 956                 }
 957
 958                 prev = outerHook(pit, pars_);
 959                 if (prev != pit_type(pars_.size())) {
 960                         maxasc += int(pars_[prev].layout()->parsep * dh);
 961                 } else if (pit != 0) {
 962                         if (pars_[pit - 1].getDepth() != 0 ||
 963                                         pars_[pit - 1].layout() == layout) {
 964                                 maxasc += int(layout->parsep * dh);
 965                         }
 966                 }
 967         }
 968
 969         // is it a bottom line?
 970         if (row.endpos() >= par.size()) {
 971                 // add the layout spaces, for example before and after
 972                 // a section, or between the items of a itemize or enumerate
 973                 // environment
 974                 pit_type nextpit = pit + 1;
 975                 if (nextpit != pit_type(pars_.size())) {
 976                         pit_type cpit = pit;
 977                         double usual = 0;
 978                         double unusual = 0;
 979
 980                         if (pars_[cpit].getDepth() > pars_[nextpit].getDepth()) {
 981                                 usual = pars_[cpit].layout()->bottomsep * dh;
 982                                 cpit = depthHook(cpit, paragraphs(), pars_[nextpit].getDepth());
 983                                 if (pars_[cpit].layout() != pars_[nextpit].layout()
 984                                         || pars_[nextpit].getLabelWidthString() != pars_[cpit].getLabelWidthString())
 985                                 {
 986                                         unusual = pars_[cpit].layout()->bottomsep * dh;
 987                                 }
 988                                 layoutdesc = max(unusual, usual);
 989                         } else if (pars_[cpit].getDepth() == pars_[nextpit].getDepth()) {
 990                                 if (pars_[cpit].layout() != pars_[nextpit].layout()
 991                                         || pars_[nextpit].getLabelWidthString() != pars_[cpit].getLabelWidthString())
 992                                         layoutdesc = int(pars_[cpit].layout()->bottomsep * dh);
 993                         }
 994                 }
 995         }
 996
 997         // incalculate the layout spaces
 998         maxasc  += int(layoutasc  * 2 / (2 + pars_[pit].getDepth()));
 999         maxdesc += int(layoutdesc * 2 / (2 + pars_[pit].getDepth()));
1000
1001         // Top and bottom margin of the document (only at top-level)
1002         if (bv_owner->text() == this) {
1003                 if (pit == 0 && row.pos() == 0)
1004                         maxasc += 20;
1005                 if (pit + 1 == pars_.size() && row.endpos() == par.size())
1006                         maxdesc += 20;
1007         }
1008
1009         row.ascent(maxasc + labeladdon);
1010         row.descent(maxdesc);
1011 }
1012
1013
1014 namespace {
1015
1016 }
1017
1018 void LyXText::breakParagraph(LCursor & cur, bool keep_layout)
1019 {
1020         BOOST_ASSERT(this == cur.text());
1021         // allow only if at start or end, or all previous is new text
1022         Paragraph & cpar = cur.paragraph();
1023         pit_type cpit = cur.pit();
1024
1025         if (cur.pos() != 0 && cur.pos() != cur.lastpos()
1026             && cpar.isChangeEdited(0, cur.pos()))
1027                 return;
1028
1029         LyXTextClass const & tclass = cur.buffer().params().getLyXTextClass();
1030         LyXLayout_ptr const & layout = cpar.layout();
1031
1032         // this is only allowed, if the current paragraph is not empty
1033         // or caption and if it has not the keepempty flag active
1034         if (cur.lastpos() == 0 && !cpar.allowEmpty()
1035            && layout->labeltype != LABEL_SENSITIVE)
1036                 return;
1037
1038         // a layout change may affect also the following paragraph
1039         recUndo(cur.pit(), undoSpan(cur.pit()) - 1);
1040
1041         // Always break behind a space
1042         // It is better to erase the space (Dekel)
1043         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
1044                 cpar.erase(cur.pos());
1045
1046         // How should the layout for the new paragraph be?
1047         int preserve_layout = 0;
1048         if (keep_layout)
1049                 preserve_layout = 2;
1050         else
1051                 preserve_layout = layout->isEnvironment();
1052
1053         // We need to remember this before we break the paragraph, because
1054         // that invalidates the layout variable
1055         bool sensitive = layout->labeltype == LABEL_SENSITIVE;
1056
1057         // we need to set this before we insert the paragraph.
1058         bool const isempty = cpar.allowEmpty() && cpar.empty();
1059
1060         ::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
1061                          cur.pos(), preserve_layout);
1062
1063         // After this, neither paragraph contains any rows!
1064
1065         cpit = cur.pit();
1066         pit_type next_par = cpit + 1;
1067
1068         // well this is the caption hack since one caption is really enough
1069         if (sensitive) {
1070                 if (cur.pos() == 0)
1071                         // set to standard-layout
1072                         pars_[cpit].applyLayout(tclass.defaultLayout());
1073                 else
1074                         // set to standard-layout
1075                         pars_[next_par].applyLayout(tclass.defaultLayout());
1076         }
1077
1078         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0))
1079                 pars_[next_par].erase(0);
1080
1081         updateCounters(cur.buffer());
1082
1083         // This check is necessary. Otherwise the new empty paragraph will
1084         // be deleted automatically. And it is more friendly for the user!
1085         if (cur.pos() != 0 || isempty)
1086                 setCursor(cur, cur.pit() + 1, 0);
1087         else
1088                 setCursor(cur, cur.pit(), 0);
1089 }
1090
1091
1092 // insert a character, moves all the following breaks in the
1093 // same Paragraph one to the right and make a rebreak
1094 void LyXText::insertChar(LCursor & cur, char c)
1095 {
1096         BOOST_ASSERT(this == cur.text());
1097         BOOST_ASSERT(c != Paragraph::META_INSET);
1098
1099         recordUndo(cur, Undo::INSERT);
1100
1101         Paragraph & par = cur.paragraph();
1102         // try to remove this
1103         pit_type const pit = cur.pit();
1104
1105         bool const freeSpacing = par.layout()->free_spacing ||
1106                 par.isFreeSpacing();
1107
1108         if (lyxrc.auto_number) {
1109                 static string const number_operators = "+-/*";
1110                 static string const number_unary_operators = "+-";
1111                 static string const number_seperators = ".,:";
1112
1113                 if (current_font.number() == LyXFont::ON) {
1114                         if (!IsDigit(c) && !contains(number_operators, c) &&
1115                             !(contains(number_seperators, c) &&
1116                               cur.pos() != 0 &&
1117                               cur.pos() != cur.lastpos() &&
1118                               getFont(par, cur.pos()).number() == LyXFont::ON &&
1119                               getFont(par, cur.pos() - 1).number() == LyXFont::ON)
1120                            )
1121                                 number(cur); // Set current_font.number to OFF
1122                 } else if (IsDigit(c) &&
1123                            real_current_font.isVisibleRightToLeft()) {
1124                         number(cur); // Set current_font.number to ON
1125
1126                         if (cur.pos() != 0) {
1127                                 char const c = par.getChar(cur.pos() - 1);
1128                                 if (contains(number_unary_operators, c) &&
1129                                     (cur.pos() == 1
1130                                      || par.isSeparator(cur.pos() - 2)
1131                                      || par.isNewline(cur.pos() - 2))
1132                                   ) {
1133                                         setCharFont(pit, cur.pos() - 1, current_font);
1134                                 } else if (contains(number_seperators, c)
1135                                      && cur.pos() >= 2
1136                                      && getFont(par, cur.pos() - 2).number() == LyXFont::ON) {
1137                                         setCharFont(pit, cur.pos() - 1, current_font);
1138                                 }
1139                         }
1140                 }
1141         }
1142
1143         // First check, if there will be two blanks together or a blank at
1144         // the beginning of a paragraph.
1145         // I decided to handle blanks like normal characters, the main
1146         // difference are the special checks when calculating the row.fill
1147         // (blank does not count at the end of a row) and the check here
1148
1149         // The bug is triggered when we type in a description environment:
1150         // The current_font is not changed when we go from label to main text
1151         // and it should (along with realtmpfont) when we type the space.
1152         // CHECK There is a bug here! (Asger)
1153
1154         // store the current font.  This is because of the use of cursor
1155         // movements. The moving cursor would refresh the current font
1156         LyXFont realtmpfont = real_current_font;
1157         LyXFont rawtmpfont = current_font;
1158
1159         // When the free-spacing option is set for the current layout,
1160         // disable the double-space checking
1161         if (!freeSpacing && IsLineSeparatorChar(c)) {
1162                 if (cur.pos() == 0) {
1163                         static bool sent_space_message = false;
1164                         if (!sent_space_message) {
1165                                 cur.message(_("You cannot insert a space at the "
1166                                         "beginning of a paragraph. Please read the Tutorial."));
1167                                 sent_space_message = true;
1168                         }
1169                         return;
1170                 }
1171                 BOOST_ASSERT(cur.pos() > 0);
1172                 if ((par.isLineSeparator(cur.pos() - 1)
1173                     || par.isNewline(cur.pos() - 1))
1174                     && par.lookupChange(cur.pos() - 1) != Change::DELETED) {
1175                         static bool sent_space_message = false;
1176                         if (!sent_space_message) {
1177                                 cur.message(_("You cannot type two spaces this way. "
1178                                         "Please read the Tutorial."));
1179                                 sent_space_message = true;
1180                         }
1181                         return;
1182                 }
1183         }
1184
1185         par.insertChar(cur.pos(), c, rawtmpfont);
1186
1187         current_font = rawtmpfont;
1188         real_current_font = realtmpfont;
1189         //setCursor(cur, cur.pit(), cur.pos() + 1, false, cur.boundary());
1190         setCursor(cur, cur.pit(), cur.pos() + 1, false, true);
1191         charInserted();
1192 }
1193
1194
1195 void LyXText::charInserted()
1196 {
1197         // Here we call finishUndo for every 20 characters inserted.
1198         // This is from my experience how emacs does it. (Lgb)
1199         static unsigned int counter;
1200         if (counter < 20) {
1201                 ++counter;
1202         } else {
1203                 finishUndo();
1204                 counter = 0;
1205         }
1206 }
1207
1208
1209 RowMetrics
1210 LyXText::computeRowMetrics(pit_type const pit, Row const & row) const
1211 {
1212         RowMetrics result;
1213         Paragraph const & par = pars_[pit];
1214
1215         double w = dim_.wid - row.width();
1216
1217         bool const is_rtl = isRTL(par);
1218         if (is_rtl)
1219                 result.x = rightMargin(par);
1220         else
1221                 result.x = leftMargin(pit, row.pos());
1222
1223         // is there a manual margin with a manual label
1224         LyXLayout_ptr const & layout = par.layout();
1225
1226         if (layout->margintype == MARGIN_MANUAL
1227             && layout->labeltype == LABEL_MANUAL) {
1228                 /// We might have real hfills in the label part
1229                 int nlh = numberOfLabelHfills(par, row);
1230
1231                 // A manual label par (e.g. List) has an auto-hfill
1232                 // between the label text and the body of the
1233                 // paragraph too.
1234                 // But we don't want to do this auto hfill if the par
1235                 // is empty.
1236                 if (!par.empty())
1237                         ++nlh;
1238
1239                 if (nlh && !par.getLabelWidthString().empty())
1240                         result.label_hfill = labelFill(par, row) / double(nlh);
1241         }
1242
1243         // are there any hfills in the row?
1244         int const nh = numberOfHfills(par, row);
1245
1246         if (nh) {
1247                 if (w > 0)
1248                         result.hfill = w / nh;
1249         // we don't have to look at the alignment if it is ALIGN_LEFT and
1250         // if the row is already larger then the permitted width as then
1251         // we force the LEFT_ALIGN'edness!
1252         } else if (int(row.width()) < maxwidth_) {
1253                 // is it block, flushleft or flushright?
1254                 // set x how you need it
1255                 int align;
1256                 if (par.params().align() == LYX_ALIGN_LAYOUT)
1257                         align = layout->align;
1258                 else
1259                         align = par.params().align();
1260
1261                 // Display-style insets should always be on a centred row
1262                 // The test on par.size() is to catch zero-size pars, which
1263                 // would trigger the assert in Paragraph::getInset().
1264                 //inset = par.size() ? par.getInset(row.pos()) : 0;
1265                 if (!par.empty()
1266                     && par.isInset(row.pos())
1267                     && par.getInset(row.pos())->display())
1268                 {
1269                         align = LYX_ALIGN_CENTER;
1270                 }
1271
1272                 switch (align) {
1273                 case LYX_ALIGN_BLOCK: {
1274                         int const ns = numberOfSeparators(par, row);
1275                         bool disp_inset = false;
1276                         if (row.endpos() < par.size()) {
1277                                 InsetBase const * in = par.getInset(row.endpos());
1278                                 if (in)
1279                                         disp_inset = in->display();
1280                         }
1281                         // If we have separators, this is not the last row of a
1282                         // par, does not end in newline, and is not row above a
1283                         // display inset... then stretch it
1284                         if (ns
1285                             && row.endpos() < par.size()
1286                             && !par.isNewline(row.endpos() - 1)
1287                             && !disp_inset
1288                                 ) {
1289                                 result.separator = w / ns;
1290                         } else if (is_rtl) {
1291                                 result.x += w;
1292                         }
1293                         break;
1294                 }
1295                 case LYX_ALIGN_RIGHT:
1296                         result.x += w;
1297                         break;
1298                 case LYX_ALIGN_CENTER:
1299                         result.x += w / 2;
1300                         break;
1301                 }
1302         }
1303
1304         bidi.computeTables(par, *bv()->buffer(), row);
1305         if (is_rtl) {
1306                 pos_type body_pos = par.beginOfBody();
1307                 pos_type end = row.endpos();
1308
1309                 if (body_pos > 0
1310                     && (body_pos > end || !par.isLineSeparator(body_pos - 1)))
1311                 {
1312                         result.x += font_metrics::width(layout->labelsep, getLabelFont(par));
1313                         if (body_pos <= end)
1314                                 result.x += result.label_hfill;
1315                 }
1316         }
1317
1318         return result;
1319 }
1320
1321
1322 // the cursor set functions have a special mechanism. When they
1323 // realize, that you left an empty paragraph, they will delete it.
1324
1325 bool LyXText::cursorRightOneWord(LCursor & cur)
1326 {
1327         BOOST_ASSERT(this == cur.text());
1328
1329         LCursor old = cur;
1330
1331         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
1332                 ++old.pit();
1333                 old.pos() = 0;
1334         } else {
1335                 // Skip through initial nonword stuff.
1336                 // Treat floats and insets as words.
1337                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
1338                         ++old.pos();
1339                 // Advance through word.
1340                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
1341                         ++old.pos();
1342         }
1343         return setCursor(cur, old.pit(), old.pos());
1344 }
1345
1346
1347 bool LyXText::cursorLeftOneWord(LCursor & cur)
1348 {
1349         BOOST_ASSERT(this == cur.text());
1350
1351         LCursor old = cur;
1352
1353         if (old.pos() == 0 && old.pit() != 0) {
1354                 --old.pit();
1355                 old.pos() = old.lastpos();
1356         } else {
1357                 // Skip through initial nonword stuff.
1358                 // Treat floats and insets as words.
1359                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
1360                         --old.pos();
1361                 // Advance through word.
1362                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
1363                         --old.pos();
1364         }
1365         return setCursor(cur, old.pit(), old.pos());
1366 }
1367
1368
1369 void LyXText::selectWord(LCursor & cur, word_location loc)
1370 {
1371         BOOST_ASSERT(this == cur.text());
1372         CursorSlice from = cur.top();
1373         CursorSlice to = cur.top();
1374         getWord(from, to, loc);
1375         if (cur.top() != from)
1376                 setCursor(cur, from.pit(), from.pos());
1377         if (to == from)
1378                 return;
1379         cur.resetAnchor();
1380         setCursor(cur, to.pit(), to.pos());
1381         cur.setSelection();
1382 }
1383
1384
1385 // Select the word currently under the cursor when no
1386 // selection is currently set
1387 bool LyXText::selectWordWhenUnderCursor(LCursor & cur, word_location loc)
1388 {
1389         BOOST_ASSERT(this == cur.text());
1390         if (cur.selection())
1391                 return false;
1392         selectWord(cur, loc);
1393         return cur.selection();
1394 }
1395
1396
1397 void LyXText::acceptChange(LCursor & cur)
1398 {
1399         BOOST_ASSERT(this == cur.text());
1400         if (!cur.selection() && cur.lastpos() != 0)
1401                 return;
1402
1403         CursorSlice const & startc = cur.selBegin();
1404         CursorSlice const & endc = cur.selEnd();
1405         if (startc.pit() == endc.pit()) {
1406                 recordUndoSelection(cur, Undo::INSERT);
1407                 pars_[startc.pit()].acceptChange(startc.pos(), endc.pos());
1408                 finishUndo();
1409                 cur.clearSelection();
1410                 setCursorIntern(cur, startc.pit(), 0);
1411         }
1412 #ifdef WITH_WARNINGS
1413 #warning handle multi par selection
1414 #endif
1415 }
1416
1417
1418 void LyXText::rejectChange(LCursor & cur)
1419 {
1420         BOOST_ASSERT(this == cur.text());
1421         if (!cur.selection() && cur.lastpos() != 0)
1422                 return;
1423
1424         CursorSlice const & startc = cur.selBegin();
1425         CursorSlice const & endc = cur.selEnd();
1426         if (startc.pit() == endc.pit()) {
1427                 recordUndoSelection(cur, Undo::INSERT);
1428                 pars_[startc.pit()].rejectChange(startc.pos(), endc.pos());
1429                 finishUndo();
1430                 cur.clearSelection();
1431                 setCursorIntern(cur, startc.pit(), 0);
1432         }
1433 #ifdef WITH_WARNINGS
1434 #warning handle multi par selection
1435 #endif
1436 }
1437
1438
1439 // Delete from cursor up to the end of the current or next word.
1440 void LyXText::deleteWordForward(LCursor & cur)
1441 {
1442         BOOST_ASSERT(this == cur.text());
1443         if (cur.lastpos() == 0)
1444                 cursorRight(cur);
1445         else {
1446                 cur.resetAnchor();
1447                 cur.selection() = true;
1448                 cursorRightOneWord(cur);
1449                 cur.setSelection();
1450                 cutSelection(cur, true, false);
1451         }
1452 }
1453
1454
1455 // Delete from cursor to start of current or prior word.
1456 void LyXText::deleteWordBackward(LCursor & cur)
1457 {
1458         BOOST_ASSERT(this == cur.text());
1459         if (cur.lastpos() == 0)
1460                 cursorLeft(cur);
1461         else {
1462                 cur.resetAnchor();
1463                 cur.selection() = true;
1464                 cursorLeftOneWord(cur);
1465                 cur.setSelection();
1466                 cutSelection(cur, true, false);
1467         }
1468 }
1469
1470
1471 // Kill to end of line.
1472 void LyXText::deleteLineForward(LCursor & cur)
1473 {
1474         BOOST_ASSERT(this == cur.text());
1475         if (cur.lastpos() == 0) {
1476                 // Paragraph is empty, so we just go to the right
1477                 cursorRight(cur);
1478         } else {
1479                 cur.resetAnchor();
1480                 cur.selection() = true; // to avoid deletion
1481                 cursorEnd(cur);
1482                 cur.setSelection();
1483                 // What is this test for ??? (JMarc)
1484                 if (!cur.selection())
1485                         deleteWordForward(cur);
1486                 else
1487                         cutSelection(cur, true, false);
1488         }
1489 }
1490
1491
1492 void LyXText::changeCase(LCursor & cur, LyXText::TextCase action)
1493 {
1494         BOOST_ASSERT(this == cur.text());
1495         CursorSlice from;
1496         CursorSlice to;
1497
1498         if (cur.selection()) {
1499                 from = cur.selBegin();
1500                 to = cur.selEnd();
1501         } else {
1502                 from = cur.top();
1503                 getWord(from, to, lyx::PARTIAL_WORD);
1504                 setCursor(cur, to.pit(), to.pos() + 1);
1505         }
1506
1507         recordUndoSelection(cur);
1508
1509         pos_type pos = from.pos();
1510         int par = from.pit();
1511
1512         while (par != int(pars_.size()) && (pos != to.pos() || par != to.pit())) {
1513                 pit_type pit = par;
1514                 if (pos == pars_[pit].size()) {
1515                         ++par;
1516                         pos = 0;
1517                         continue;
1518                 }
1519                 unsigned char c = pars_[pit].getChar(pos);
1520                 if (c != Paragraph::META_INSET) {
1521                         switch (action) {
1522                         case text_lowercase:
1523                                 c = lowercase(c);
1524                                 break;
1525                         case text_capitalization:
1526                                 c = uppercase(c);
1527                                 action = text_lowercase;
1528                                 break;
1529                         case text_uppercase:
1530                                 c = uppercase(c);
1531                                 break;
1532                         }
1533                 }
1534 #ifdef WITH_WARNINGS
1535 #warning changes
1536 #endif
1537                 pars_[pit].setChar(pos, c);
1538                 ++pos;
1539         }
1540 }
1541
1542
1543 void LyXText::Delete(LCursor & cur)
1544 {
1545         BOOST_ASSERT(this == cur.text());
1546
1547         if (cur.pos() != cur.lastpos()) {
1548                 recordUndo(cur, Undo::DELETE, cur.pit());
1549                 setCursorIntern(cur, cur.pit(), cur.pos() + 1, false, cur.boundary());
1550                 backspace(cur);
1551         } else if (cur.pit() != cur.lastpit()) {
1552                 LCursor scur = cur;
1553
1554                 setCursorIntern(cur, cur.pit()+1, 0, false, false);
1555                 if (pars_[cur.pit()].layout() == pars_[scur.pit()].layout()) {
1556                         recordUndo(scur, Undo::DELETE, scur.pit());
1557                         backspace(cur);
1558                 } else {
1559                         setCursorIntern(scur, scur.pit(), scur.pos(), false, scur.boundary());
1560                 }
1561         }
1562 }
1563
1564
1565 void LyXText::backspace(LCursor & cur)
1566 {
1567         BOOST_ASSERT(this == cur.text());
1568         if (cur.pos() == 0) {
1569                 // The cursor is at the beginning of a paragraph, so
1570                 // the the backspace will collapse two paragraphs into
1571                 // one.
1572
1573                 // but it's not allowed unless it's new
1574                 Paragraph & par = cur.paragraph();
1575                 if (par.isChangeEdited(0, par.size()))
1576                         return;
1577
1578                 // we may paste some paragraphs
1579
1580                 // is it an empty paragraph?
1581                 pos_type lastpos = cur.lastpos();
1582                 if (lastpos == 0 || (lastpos == 1 && par.isSeparator(0))) {
1583                         // This is an empty paragraph and we delete it just
1584                         // by moving the cursor one step
1585                         // left and let the DeleteEmptyParagraphMechanism
1586                         // handle the actual deletion of the paragraph.
1587
1588                         if (cur.pit() != 0) {
1589                                 // For KeepEmpty layouts we need to get
1590                                 // rid of the keepEmpty setting first.
1591                                 // And the only way to do this is to
1592                                 // reset the layout to something
1593                                 // else: f.ex. the default layout.
1594                                 if (par.allowEmpty()) {
1595                                         Buffer & buf = cur.buffer();
1596                                         BufferParams const & bparams = buf.params();
1597                                         par.layout(bparams.getLyXTextClass().defaultLayout());
1598                                 }
1599
1600                                 cursorLeft(cur);
1601                                 return;
1602                         }
1603                 }
1604
1605                 if (cur.pit() != 0)
1606                         recordUndo(cur, Undo::DELETE, cur.pit() - 1);
1607
1608                 pit_type tmppit = cur.pit();
1609                 // We used to do cursorLeftIntern() here, but it is
1610                 // not a good idea since it triggers the auto-delete
1611                 // mechanism. So we do a cursorLeftIntern()-lite,
1612                 // without the dreaded mechanism. (JMarc)
1613                 if (cur.pit() != 0) {
1614                         // steps into the above paragraph.
1615                         setCursorIntern(cur, cur.pit() - 1,
1616                                         pars_[cur.pit() - 1].size(),
1617                                         false);
1618                 }
1619
1620                 // Pasting is not allowed, if the paragraphs have different
1621                 // layout. I think it is a real bug of all other
1622                 // word processors to allow it. It confuses the user.
1623                 // Correction: Pasting is always allowed with standard-layout
1624                 // Correction (Jug 20050717): Remove check about alignment!
1625                 Buffer & buf = cur.buffer();
1626                 BufferParams const & bufparams = buf.params();
1627                 LyXTextClass const & tclass = bufparams.getLyXTextClass();
1628                 pit_type const cpit = cur.pit();
1629
1630                 if (cpit != tmppit
1631                     && (pars_[cpit].layout() == pars_[tmppit].layout()
1632                         || pars_[tmppit].layout() == tclass.defaultLayout()))
1633                 {
1634                         mergeParagraph(bufparams, pars_, cpit);
1635
1636                         if (cur.pos() != 0 && pars_[cpit].isSeparator(cur.pos() - 1))
1637                                 --cur.pos();
1638
1639                         // the counters may have changed
1640                         updateCounters(cur.buffer());
1641                         setCursor(cur, cur.pit(), cur.pos(), false);
1642                 }
1643         } else {
1644                 // this is the code for a normal backspace, not pasting
1645                 // any paragraphs
1646                 recordUndo(cur, Undo::DELETE);
1647                 // We used to do cursorLeftIntern() here, but it is
1648                 // not a good idea since it triggers the auto-delete
1649                 // mechanism. So we do a cursorLeftIntern()-lite,
1650                 // without the dreaded mechanism. (JMarc)
1651                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1652                                 false, cur.boundary());
1653                 cur.paragraph().erase(cur.pos());
1654         }
1655
1656         if (cur.pos() == cur.lastpos())
1657                 setCurrentFont(cur);
1658
1659         setCursor(cur, cur.pit(), cur.pos(), false, cur.boundary());
1660 }
1661
1662
1663 Row const & LyXText::firstRow() const
1664 {
1665         return *paragraphs().front().rows().begin();
1666 }
1667
1668
1669 bool LyXText::redoParagraph(pit_type const pit)
1670 {
1671         // remove rows of paragraph, keep track of height changes
1672         Paragraph & par = pars_[pit];
1673
1674         // Add bibitem insets if necessary
1675         if (par.layout()->labeltype == LABEL_BIBLIO) {
1676                 bool hasbibitem(false);
1677                 if (!par.insetlist.empty()
1678                         // Insist on it being in pos 0
1679                         && par.getChar(0) == Paragraph::META_INSET) {
1680                         InsetBase * inset = par.insetlist.begin()->inset;
1681                         if (inset->lyxCode() == InsetBase::BIBITEM_CODE)
1682                                 hasbibitem = true;
1683                 }
1684                 if (!hasbibitem) {
1685                         InsetBibitem * inset(new
1686                                 InsetBibitem(InsetCommandParams("bibitem")));
1687                         par.insertInset(0, static_cast<InsetBase *>(inset));
1688                         bv()->cursor().posRight();
1689                 }
1690         }
1691
1692         // redo insets
1693         InsetList::iterator ii = par.insetlist.begin();
1694         InsetList::iterator iend = par.insetlist.end();
1695         for (; ii != iend; ++ii) {
1696                 Dimension dim;
1697                 int const w = maxwidth_ - leftMargin(pit, ii->pos) - rightMargin(par);
1698                 MetricsInfo mi(bv(), getFont(par, ii->pos), w);
1699                 ii->inset->metrics(mi, dim);
1700         }
1701
1702         // rebreak the paragraph
1703         par.rows().clear();
1704         Dimension dim;
1705
1706         par.setBeginOfBody();
1707         pos_type z = 0;
1708         do {
1709                 Row row(z);
1710                 rowBreakPoint(pit, row);
1711                 setRowWidth(pit, row);
1712                 setHeightOfRow(pit, row);
1713                 par.rows().push_back(row);
1714                 dim.wid = std::max(dim.wid, row.width());
1715                 dim.des += row.height();
1716                 z = row.endpos();
1717         } while (z < par.size());
1718
1719         dim.asc += par.rows()[0].ascent();
1720         dim.des -= par.rows()[0].ascent();
1721
1722         bool const same = dim == par.dim();
1723
1724         par.dim() = dim;
1725         //lyxerr << "redoParagraph: " << par.rows().size() << " rows\n";
1726
1727         return !same;
1728 }
1729
1730
1731 void LyXText::metrics(MetricsInfo & mi, Dimension & dim)
1732 {
1733         //BOOST_ASSERT(mi.base.textwidth);
1734         if (mi.base.textwidth)
1735                 maxwidth_ = mi.base.textwidth;
1736         //lyxerr << "LyXText::metrics: width: " << mi.base.textwidth
1737         //      << " maxWidth: " << maxwidth_ << "\nfont: " << mi.base.font << endl;
1738         // save the caller's font locally:
1739         font_ = mi.base.font;
1740
1741         unsigned int h = 0;
1742         unsigned int w = 0;
1743         for (pit_type pit = 0, n = paragraphs().size(); pit != n; ++pit) {
1744                 redoParagraph(pit);
1745                 Paragraph & par = paragraphs()[pit];
1746                 h += par.height();
1747                 if (w < par.width())
1748                         w = par.width();
1749         }
1750
1751         dim.wid = w;
1752         dim.asc = pars_[0].ascent();
1753         dim.des = h - dim.asc;
1754
1755         dim_ = dim;
1756 }
1757
1758
1759 // only used for inset right now. should also be used for main text
1760 void LyXText::draw(PainterInfo & pi, int x, int y) const
1761 {
1762         paintTextInset(*this, pi, x, y);
1763 }
1764
1765
1766 #if 0
1767 // only used for inset right now. should also be used for main text
1768 void LyXText::drawSelection(PainterInfo & pi, int x , int) const
1769 {
1770         LCursor & cur = pi.base.bv->cursor();
1771         if (!cur.selection())
1772                 return;
1773         if (!ptr_cmp(cur.text(), this))
1774                 return;
1775
1776         lyxerr << "draw selection at " << x << endl;
1777
1778         // is there a better way of getting these two iterators?
1779         DocIterator beg = cur;
1780         DocIterator end = cur;
1781
1782         beg.top() = cur.selBegin();
1783         end.top() = cur.selEnd();
1784
1785         // the selection doesn't touch the visible screen
1786         if (bv_funcs::status(pi.base.bv, beg) == bv_funcs::CUR_BELOW
1787             || bv_funcs::status(pi.base.bv, end) == bv_funcs::CUR_ABOVE)
1788                 return;
1789
1790         Paragraph const & par1 = pars_[beg.pit()];
1791         Paragraph const & par2 = pars_[end.pit()];
1792
1793         Row const & row1 = par1.getRow(beg.pos(), beg.boundary());
1794         Row const & row2 = par2.getRow(end.pos(), end.boundary());
1795
1796         int y1,x1,x2;
1797         if (bv_funcs::status(pi.base.bv, beg) == bv_funcs::CUR_ABOVE) {
1798                 y1 = 0;
1799                 x1 = 0;
1800                 x2 = 0;
1801         } else {
1802                 y1 = bv_funcs::getPos(beg).y_ - row1.ascent();
1803                 int const startx = cursorX(beg.top(), begin.boundary());
1804                 x1 = isRTL(par1) ? startx : 0;
1805                 x2 = isRTL(par1) ? 0 + dim_.wid : startx;
1806         }
1807
1808         int y2,X1,X2;
1809         if (bv_funcs::status(pi.base.bv, end) == bv_funcs::CUR_BELOW) {
1810                 y2 = pi.base.bv->workHeight();
1811                 X1 = 0;
1812                 X2 = 0;
1813         } else {
1814                 y2 = bv_funcs::getPos(end).y_ + row2.descent();
1815                 int const endx = cursorX(end.top(), end.boundary());
1816                 X1 = isRTL(par2) ? 0 : endx;
1817                 X2 = isRTL(par2) ? endx : 0 + dim_.wid;
1818         }
1819
1820         lyxerr << " y1: " << y1 << " y2: " << y2
1821                 << " xo: " << xo_ << " wid: " << dim_.wid
1822                 << endl;
1823
1824         // paint big rectangle in one go
1825         pi.pain.fillRectangle(x, y1, dim_.wid, y2 - y1, LColor::selection);
1826
1827         // reset background at begin of first selected line
1828         pi.pain.fillRectangle(x + x1, y1, x2 - x1, row1.height(),
1829                 LColor::background);
1830
1831         // reset background at end of last selected line
1832         pi.pain.fillRectangle(x + X1, y2  - row2.height(),
1833                 X2 - X1, row2.height(), LColor::background);
1834 }
1835
1836 #else
1837
1838 void LyXText::drawSelection(PainterInfo & pi, int x, int) const
1839 {
1840         LCursor & cur = pi.base.bv->cursor();
1841         if (!cur.selection())
1842                 return;
1843         if (!ptr_cmp(cur.text(), this))
1844                 return;
1845
1846         lyxerr[Debug::DEBUG]
1847                 << BOOST_CURRENT_FUNCTION
1848                 << "draw selection at " << x
1849                 << endl;
1850
1851         // is there a better way of getting these two iterators?
1852         DocIterator beg = cur;
1853         DocIterator end = cur;
1854
1855         beg.top() = cur.selBegin();
1856         end.top() = cur.selEnd();
1857
1858         // the selection doesn't touch the visible screen
1859         if (bv_funcs::status(pi.base.bv, beg) == bv_funcs::CUR_BELOW
1860             || bv_funcs::status(pi.base.bv, end) == bv_funcs::CUR_ABOVE)
1861                 return;
1862
1863         Paragraph const & par1 = pars_[beg.pit()];
1864         Paragraph const & par2 = pars_[end.pit()];
1865
1866         bool const above = (bv_funcs::status(pi.base.bv, beg)
1867                             == bv_funcs::CUR_ABOVE);
1868         bool const below = (bv_funcs::status(pi.base.bv, end)
1869                             == bv_funcs::CUR_BELOW);
1870         int y1,y2,x1,x2;
1871         if (above) {
1872                 y1 = 0;
1873                 y2 = 0;
1874                 x1 = 0;
1875                 x2 = dim_.wid;
1876         } else {
1877                 Row const & row1 = par1.getRow(beg.pos(), beg.boundary());
1878                 y1 = bv_funcs::getPos(beg, beg.boundary()).y_ - row1.ascent();
1879                 y2 = y1 + row1.height();
1880                 int const startx = cursorX(beg.top(), beg.boundary());
1881                 x1 = !isRTL(par1) ? startx : 0;
1882                 x2 = !isRTL(par1) ? 0 + dim_.wid : startx;
1883         }
1884
1885         int Y1,Y2,X1,X2;
1886         if (below) {
1887                 Y1 = pi.base.bv->workHeight();
1888                 Y2 = pi.base.bv->workHeight();
1889                 X1 = 0;
1890                 X2 = dim_.wid;
1891         } else {
1892                 Row const & row2 = par2.getRow(end.pos(), end.boundary());
1893                 Y1 = bv_funcs::getPos(end, end.boundary()).y_ - row2.ascent();
1894                 Y2 = Y1 + row2.height();
1895                 int const endx = cursorX(end.top(), end.boundary());
1896                 X1 = !isRTL(par2) ? 0 : endx;
1897                 X2 = !isRTL(par2) ? endx : 0 + dim_.wid;
1898         }
1899
1900         if (!above && !below && &par1.getRow(beg.pos(), beg.boundary())
1901             == &par2.getRow(end.pos(), end.boundary()))
1902         {
1903                 // paint only one rectangle
1904                 int const b( !isRTL(par1) ? x + x1 : x + X1 );
1905                 int const w( !isRTL(par1) ? X2 - x1 : x2 - X1 );
1906                 pi.pain.fillRectangle(b, y1, w, y2 - y1, LColor::selection);
1907                 return;
1908         }
1909
1910         lyxerr[Debug::DEBUG] << " y1: " << y1 << " y2: " << y2
1911                << "X1:" << X1 << " x2: " << X2 << " wid: " << dim_.wid
1912                 << endl;
1913
1914         // paint upper rectangle
1915         pi.pain.fillRectangle(x + x1, y1, x2 - x1, y2 - y1,
1916                                       LColor::selection);
1917         // paint bottom rectangle
1918         pi.pain.fillRectangle(x + X1, Y1, X2 - X1, Y2 - Y1,
1919                                       LColor::selection);
1920         // paint center rectangle
1921         pi.pain.fillRectangle(x, y2, dim_.wid,
1922                               Y1 - y2, LColor::selection);
1923 }
1924 #endif
1925
1926 bool LyXText::isLastRow(pit_type pit, Row const & row) const
1927 {
1928         return row.endpos() >= pars_[pit].size()
1929                 && pit + 1 == pit_type(paragraphs().size());
1930 }
1931
1932
1933 bool LyXText::isFirstRow(pit_type pit, Row const & row) const
1934 {
1935         return row.pos() == 0 && pit == 0;
1936 }
1937
1938
1939 void LyXText::getWord(CursorSlice & from, CursorSlice & to,
1940         word_location const loc)
1941 {
1942         Paragraph const & from_par = pars_[from.pit()];
1943         switch (loc) {
1944         case lyx::WHOLE_WORD_STRICT:
1945                 if (from.pos() == 0 || from.pos() == from_par.size()
1946                     || !from_par.isLetter(from.pos())
1947                     || !from_par.isLetter(from.pos() - 1)) {
1948                         to = from;
1949                         return;
1950                 }
1951                 // no break here, we go to the next
1952
1953         case lyx::WHOLE_WORD:
1954                 // If we are already at the beginning of a word, do nothing
1955                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1956                         break;
1957                 // no break here, we go to the next
1958
1959         case lyx::PREVIOUS_WORD:
1960                 // always move the cursor to the beginning of previous word
1961                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1962                         --from.pos();
1963                 break;
1964         case lyx::NEXT_WORD:
1965                 lyxerr << "LyXText::getWord: NEXT_WORD not implemented yet"
1966                        << endl;
1967                 break;
1968         case lyx::PARTIAL_WORD:
1969                 // no need to move the 'from' cursor
1970                 break;
1971         }
1972         to = from;
1973         Paragraph & to_par = pars_[to.pit()];
1974         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1975                 ++to.pos();
1976 }
1977
1978
1979 void LyXText::write(Buffer const & buf, std::ostream & os) const
1980 {
1981         ParagraphList::const_iterator pit = paragraphs().begin();
1982         ParagraphList::const_iterator end = paragraphs().end();
1983         Paragraph::depth_type dth = 0;
1984         for (; pit != end; ++pit)
1985                 pit->write(buf, os, buf.params(), dth);
1986 }
1987
1988
1989 bool LyXText::read(Buffer const & buf, LyXLex & lex)
1990 {
1991         Paragraph::depth_type depth = 0;
1992
1993         while (lex.isOK()) {
1994                 lex.nextToken();
1995                 string const token = lex.getString();
1996
1997                 if (token.empty())
1998                         continue;
1999
2000                 if (token == "\\end_inset") {
2001                         break;
2002                 }
2003
2004                 if (token == "\\end_body") {
2005                         continue;
2006                 }
2007
2008                 if (token == "\\begin_body") {
2009                         continue;
2010                 }
2011
2012                 if (token == "\\end_document") {
2013                         return false;
2014                 }
2015
2016                 if (token == "\\begin_layout") {
2017                         lex.pushToken(token);
2018
2019                         Paragraph par;
2020                         par.params().depth(depth);
2021                         if (buf.params().tracking_changes)
2022                                 par.trackChanges();
2023                         par.setFont(0, LyXFont(LyXFont::ALL_INHERIT, buf.params().language));
2024                         pars_.push_back(par);
2025
2026                         // FIXME: goddamn InsetTabular makes us pass a Buffer
2027                         // not BufferParams
2028                         ::readParagraph(buf, pars_.back(), lex);
2029
2030                 } else if (token == "\\begin_deeper") {
2031                         ++depth;
2032                 } else if (token == "\\end_deeper") {
2033                         if (!depth) {
2034                                 lex.printError("\\end_deeper: " "depth is already null");
2035                         } else {
2036                                 --depth;
2037                         }
2038                 } else {
2039                         lyxerr << "Handling unknown body token: `"
2040                                << token << '\'' << endl;
2041                 }
2042         }
2043         return true;
2044 }
2045
2046
2047 int LyXText::ascent() const
2048 {
2049         return dim_.asc;
2050 }
2051
2052
2053 int LyXText::descent() const
2054 {
2055         return dim_.des;
2056 }
2057
2058
2059 int LyXText::cursorX(CursorSlice const & sl, bool boundary) const
2060 {
2061         pit_type const pit = sl.pit();
2062         Paragraph const & par = pars_[pit];
2063         if (par.rows().empty())
2064                 return 0;
2065
2066         pos_type ppos = sl.pos();
2067         // Correct position in front of big insets
2068         bool const boundary_correction = ppos != 0 && boundary;
2069         if (boundary_correction)
2070                 --ppos;
2071
2072         Row const & row = par.getRow(sl.pos(), boundary);
2073
2074         pos_type cursor_vpos = 0;
2075
2076         RowMetrics const m = computeRowMetrics(pit, row);
2077         double x = m.x;
2078
2079         pos_type const row_pos  = row.pos();
2080         pos_type const end      = row.endpos();
2081
2082         if (end <= row_pos)
2083                 cursor_vpos = row_pos;
2084         else if (ppos >= end)
2085                 cursor_vpos = isRTL(par) ? row_pos : end;
2086         else if (ppos > row_pos && ppos >= end)
2087                 // Place cursor after char at (logical) position pos - 1
2088                 cursor_vpos = (bidi.level(ppos - 1) % 2 == 0)
2089                         ? bidi.log2vis(ppos - 1) + 1 : bidi.log2vis(ppos - 1);
2090         else
2091                 // Place cursor before char at (logical) position ppos
2092                 cursor_vpos = (bidi.level(ppos) % 2 == 0)
2093                         ? bidi.log2vis(ppos) : bidi.log2vis(ppos) + 1;
2094
2095         pos_type body_pos = par.beginOfBody();
2096         if (body_pos > 0 &&
2097             (body_pos > end || !par.isLineSeparator(body_pos - 1)))
2098                 body_pos = 0;
2099
2100         // Use font span to speed things up, see below
2101         FontSpan font_span;
2102         LyXFont font;
2103
2104         for (pos_type vpos = row_pos; vpos < cursor_vpos; ++vpos) {
2105                 pos_type pos = bidi.vis2log(vpos);
2106                 if (body_pos > 0 && pos == body_pos - 1) {
2107                         x += m.label_hfill
2108                                 + font_metrics::width(par.layout()->labelsep,
2109                                                       getLabelFont(par));
2110                         if (par.isLineSeparator(body_pos - 1))
2111                                 x -= singleWidth(par, body_pos - 1);
2112                 }
2113
2114                 // Use font span to speed things up, see above
2115                 if (pos < font_span.first || pos > font_span.last) {
2116                         font_span = par.fontSpan(pos);
2117                         font = getFont(par, pos);
2118                 }
2119
2120                 x += singleWidth(par, pos, par.getChar(pos), font);
2121
2122                 if (hfillExpansion(par, row, pos))
2123                         x += (pos >= body_pos) ? m.hfill : m.label_hfill;
2124                 else if (par.isSeparator(pos) && pos >= body_pos)
2125                         x += m.separator;
2126         }
2127
2128         // see correction above
2129         if (boundary_correction)
2130                 if (getFont(par, ppos).isVisibleRightToLeft())
2131                         x -= singleWidth(par, ppos);
2132                 else
2133                         x += singleWidth(par, ppos);
2134
2135         // Make sure inside an inset we always count from the left
2136         // edge (bidi!) -- MV
2137         if (sl.pos() < par.size()) {
2138                 font = getFont(par, sl.pos());
2139                 if (!boundary && font.isVisibleRightToLeft()
2140                   && par.isInset(sl.pos()))
2141                         x -= par.getInset(sl.pos())->width();
2142         }
2143         return int(x);
2144 }
2145
2146
2147 int LyXText::cursorY(CursorSlice const & sl, bool boundary) const
2148 {
2149         //lyxerr << "LyXText::cursorY: boundary: " << boundary << std::endl;
2150         Paragraph const & par = getPar(sl.pit());
2151         int h = 0;
2152         h -= pars_[0].rows()[0].ascent();
2153         for (pit_type pit = 0; pit < sl.pit(); ++pit)
2154                 h += pars_[pit].height();
2155         int pos = sl.pos();
2156         if (pos && boundary)
2157                 --pos;
2158         size_t const rend = par.pos2row(pos);
2159         for (size_t rit = 0; rit != rend; ++rit)
2160                 h += par.rows()[rit].height();
2161         h += par.rows()[rend].ascent();
2162         return h;
2163 }
2164
2165
2166 // Returns the current font and depth as a message.
2167 string LyXText::currentState(LCursor & cur)
2168 {
2169         BOOST_ASSERT(this == cur.text());
2170         Buffer & buf = cur.buffer();
2171         Paragraph const & par = cur.paragraph();
2172         std::ostringstream os;
2173
2174         bool const show_change = buf.params().tracking_changes
2175                 && cur.pos() != cur.lastpos()
2176                 && par.lookupChange(cur.pos()) != Change::UNCHANGED;
2177
2178         if (show_change) {
2179                 Change change = par.lookupChangeFull(cur.pos());
2180                 Author const & a = buf.params().authors().get(change.author);
2181                 os << _("Change: ") << a.name();
2182                 if (!a.email().empty())
2183                         os << " (" << a.email() << ")";
2184                 if (change.changetime)
2185                         os << _(" at ") << ctime(&change.changetime);
2186                 os << " : ";
2187         }
2188
2189         // I think we should only show changes from the default
2190         // font. (Asger)
2191         LyXFont font = real_current_font;
2192         font.reduce(buf.params().getLyXTextClass().defaultfont());
2193
2194         // avoid _(...) re-entrance problem
2195         string const s = font.stateText(&buf.params());
2196         os << bformat(_("Font: %1$s"), s);
2197
2198         // os << bformat(_("Font: %1$s"), font.stateText(&buf.params));
2199
2200         // The paragraph depth
2201         int depth = cur.paragraph().getDepth();
2202         if (depth > 0)
2203                 os << bformat(_(", Depth: %1$d"), depth);
2204
2205         // The paragraph spacing, but only if different from
2206         // buffer spacing.
2207         Spacing const & spacing = par.params().spacing();
2208         if (!spacing.isDefault()) {
2209                 os << _(", Spacing: ");
2210                 switch (spacing.getSpace()) {
2211                 case Spacing::Single:
2212                         os << _("Single");
2213                         break;
2214                 case Spacing::Onehalf:
2215                         os << _("OneHalf");
2216                         break;
2217                 case Spacing::Double:
2218                         os << _("Double");
2219                         break;
2220                 case Spacing::Other:
2221                         os << _("Other (") << spacing.getValueAsString() << ')';
2222                         break;
2223                 case Spacing::Default:
2224                         // should never happen, do nothing
2225                         break;
2226                 }
2227         }
2228
2229 #ifdef DEVEL_VERSION
2230         os << _(", Inset: ") << &cur.inset();
2231         os << _(", Paragraph: ") << cur.pit();
2232         os << _(", Id: ") << par.id();
2233         os << _(", Position: ") << cur.pos();
2234         os << _(", Boundary: ") << cur.boundary();
2235 //      Row & row = cur.textRow();
2236 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
2237 #endif
2238         return os.str();
2239 }
2240
2241
2242 string LyXText::getPossibleLabel(LCursor & cur) const
2243 {
2244         pit_type pit = cur.pit();
2245
2246         LyXLayout_ptr layout = pars_[pit].layout();
2247
2248         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
2249                 LyXLayout_ptr const & layout2 = pars_[pit - 1].layout();
2250                 if (layout2->latextype != LATEX_PARAGRAPH) {
2251                         --pit;
2252                         layout = layout2;
2253                 }
2254         }
2255
2256         string text = layout->latexname().substr(0, 3);
2257         if (layout->latexname() == "theorem")
2258                 text = "thm"; // Create a correct prefix for prettyref
2259
2260         text += ':';
2261         if (layout->latextype == LATEX_PARAGRAPH || lyxrc.label_init_length < 0)
2262                 text.erase();
2263
2264         string par_text = pars_[pit].asString(cur.buffer(), false);
2265         for (int i = 0; i < lyxrc.label_init_length; ++i) {
2266                 if (par_text.empty())
2267                         break;
2268                 string head;
2269                 par_text = split(par_text, head, ' ');
2270                 // Is it legal to use spaces in labels ?
2271                 if (i > 0)
2272                         text += '-';
2273                 text += head;
2274         }
2275
2276         return text;
2277 }
2278
2279
2280 //pos_type LyXText::x2pos(pit_type pit, int row, int x) const
2281 //{
2282 //      int lastx = 0;
2283 //      int currx = 0;
2284 //      Paragraph const & par = pars_[pit];
2285 //      Row const & r = par.rows()[row];
2286 //      int pos = r.pos();
2287 //      for (; currx < x && pos < r.endpos(); ++pos) {
2288 //              lastx = currx;
2289 //              currx += singleWidth(par, pos);
2290 //      }
2291 //      if (abs(lastx - x) < abs(currx - x) && pos != r.pos())
2292 //              --pos;
2293 //      return pos;
2294 //}
2295
2296
2297 pos_type LyXText::x2pos(pit_type pit, int row, int x) const
2298 {
2299         BOOST_ASSERT(row < int(pars_[pit].rows().size()));
2300         bool bound = false;
2301         Row const & r = pars_[pit].rows()[row];
2302         return r.pos() + getColumnNearX(pit, r, x, bound);
2303 }
2304
2305
2306 //int LyXText::pos2x(pit_type pit, pos_type pos) const
2307 //{
2308 //      Paragraph const & par = pars_[pit];
2309 //      Row const & r = par.rows()[row];
2310 //      int x = 0;
2311 //      pos -= r.pos();
2312 //}
2313
2314
2315 // x,y are screen coordinates
2316 // sets cursor only within this LyXText
2317 void LyXText::setCursorFromCoordinates(LCursor & cur, int const x, int const y)
2318 {
2319         pit_type pit = getPitNearY(y);
2320         int yy = theCoords.get(this, pit).y_ - pars_[pit].ascent();
2321         lyxerr[Debug::DEBUG]
2322                 << BOOST_CURRENT_FUNCTION
2323                 << ": x: " << x
2324                 << " y: " << y
2325                 << " pit: " << pit
2326                 << " yy: " << yy << endl;
2327
2328         Paragraph const & par = pars_[pit];
2329         int r = 0;
2330         BOOST_ASSERT(par.rows().size());
2331         for (; r < int(par.rows().size()) - 1; ++r) {
2332                 Row const & row = par.rows()[r];
2333                 if (int(yy + row.height()) > y)
2334                         break;
2335                 yy += row.height();
2336         }
2337
2338         Row const & row = par.rows()[r];
2339
2340         lyxerr[Debug::DEBUG]
2341                 << BOOST_CURRENT_FUNCTION
2342                 << ": row " << r
2343                 << " from pos: " << row.pos()
2344                 << endl;
2345
2346         bool bound = false;
2347         int xx = x;
2348         pos_type const pos = row.pos() + getColumnNearX(pit, row, xx, bound);
2349
2350         lyxerr[Debug::DEBUG]
2351                 << BOOST_CURRENT_FUNCTION
2352                 << ": setting cursor pit: " << pit
2353                 << " pos: " << pos
2354                 << endl;
2355
2356         setCursor(cur, pit, pos, true, bound);
2357 }