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