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 "bufferparams.h"
  24 #include "BufferView.h"
  25 #include "cursor.h"
  26 #include "CutAndPaste.h"
  27 #include "debug.h"
  28 #include "dispatchresult.h"
  29 #include "encoding.h"
  30 #include "errorlist.h"
  31 #include "funcrequest.h"
  32 #include "factory.h"
  33 #include "FontIterator.h"
  34 #include "gettext.h"
  35 #include "language.h"
  36 #include "LColor.h"
  37 #include "lyxlength.h"
  38 #include "lyxlex.h"
  39 #include "lyxrc.h"
  40 #include "lyxrow.h"
  41 #include "lyxrow_funcs.h"
  42 #include "metricsinfo.h"
  43 #include "paragraph.h"
  44 #include "paragraph_funcs.h"
  45 #include "ParagraphParameters.h"
  46 #include "rowpainter.h"
  47 #include "undo.h"
  48 #include "vspace.h"
  49 #include "WordLangTuple.h"
  50
  51 #include "frontends/font_metrics.h"
  52 #include "frontends/LyXView.h"
  53
  54 #include "insets/insettext.h"
  55 #include "insets/insetbibitem.h"
  56 #include "insets/insethfill.h"
  57 #include "insets/insetlatexaccent.h"
  58 #include "insets/insetline.h"
  59 #include "insets/insetnewline.h"
  60 #include "insets/insetpagebreak.h"
  61 #include "insets/insetoptarg.h"
  62 #include "insets/insetspace.h"
  63 #include "insets/insetspecialchar.h"
  64 #include "insets/insettabular.h"
  65
  66 #include "support/lstrings.h"
  67 #include "support/textutils.h"
  68 #include "support/tostr.h"
  69
  70 #include <sstream>
  71
  72 using lyx::par_type;
  73 using lyx::pos_type;
  74 using lyx::word_location;
  75
  76 using lyx::support::bformat;
  77 using lyx::support::contains;
  78 using lyx::support::lowercase;
  79 using lyx::support::split;
  80 using lyx::support::uppercase;
  81
  82 using lyx::cap::cutSelection;
  83
  84 using std::auto_ptr;
  85 using std::advance;
  86 using std::distance;
  87 using std::max;
  88 using std::min;
  89 using std::endl;
  90 using std::string;
  91
  92
  93 namespace {
  94
  95 int numberOfSeparators(Paragraph const & par, Row const & row)
  96 {
  97         pos_type const first = max(row.pos(), par.beginOfBody());
  98         pos_type const last = row.endpos() - 1;
  99         int n = 0;
 100         for (pos_type p = first; p < last; ++p) {
 101                 if (par.isSeparator(p))
 102                         ++n;
 103         }
 104         return n;
 105 }
 106
 107
 108 unsigned int maxParagraphWidth(ParagraphList const & plist)
 109 {
 110         unsigned int width = 0;
 111         ParagraphList::const_iterator pit = plist.begin();
 112         ParagraphList::const_iterator end = plist.end();
 113                 for (; pit != end; ++pit)
 114                         width = std::max(width, pit->width);
 115         return width;
 116 }
 117
 118
 119 int numberOfLabelHfills(Paragraph const & par, Row const & row)
 120 {
 121         pos_type last = row.endpos() - 1;
 122         pos_type first = row.pos();
 123
 124         // hfill *DO* count at the beginning of paragraphs!
 125         if (first) {
 126                 while (first < last && par.isHfill(first))
 127                         ++first;
 128         }
 129
 130         last = min(last, par.beginOfBody());
 131         int n = 0;
 132         for (pos_type p = first; p < last; ++p) {
 133                 if (par.isHfill(p))
 134                         ++n;
 135         }
 136         return n;
 137 }
 138
 139
 140 int numberOfHfills(Paragraph const & par, Row const & row)
 141 {
 142         pos_type const last = row.endpos() - 1;
 143         pos_type first = row.pos();
 144
 145         // hfill *DO* count at the beginning of paragraphs!
 146         if (first) {
 147                 while (first < last && par.isHfill(first))
 148                         ++first;
 149         }
 150
 151         first = max(first, par.beginOfBody());
 152
 153         int n = 0;
 154         for (pos_type p = first; p < last; ++p) {
 155                 if (par.isHfill(p))
 156                         ++n;
 157         }
 158         return n;
 159 }
 160
 161
 162 void readParToken(Buffer const & buf, Paragraph & par, LyXLex & lex,
 163         string const & token, LyXFont & font)
 164 {
 165         static Change change;
 166
 167         BufferParams const & bp = buf.params();
 168
 169         if (token[0] != '\\') {
 170                 string::const_iterator cit = token.begin();
 171                 for (; cit != token.end(); ++cit) {
 172                         par.insertChar(par.size(), (*cit), font, change);
 173                 }
 174         } else if (token == "\\begin_layout") {
 175                 lex.eatLine();
 176                 string layoutname = lex.getString();
 177
 178                 font = LyXFont(LyXFont::ALL_INHERIT, bp.language);
 179                 change = Change();
 180
 181                 LyXTextClass const & tclass = bp.getLyXTextClass();
 182
 183                 if (layoutname.empty()) {
 184                         layoutname = tclass.defaultLayoutName();
 185                 }
 186
 187                 bool hasLayout = tclass.hasLayout(layoutname);
 188
 189                 if (!hasLayout) {
 190                         buf.error(ErrorItem(_("Unknown layout"),
 191                         bformat(_("Layout '%1$s' does not exists in textclass '%2$s'\nTrying to use the default instead.\n"),
 192                                 layoutname, tclass.name()), par.id(), 0, par.size()));
 193                         layoutname = tclass.defaultLayoutName();
 194                 }
 195
 196                 par.layout(bp.getLyXTextClass()[layoutname]);
 197
 198                 // Test whether the layout is obsolete.
 199                 LyXLayout_ptr const & layout = par.layout();
 200                 if (!layout->obsoleted_by().empty())
 201                         par.layout(bp.getLyXTextClass()[layout->obsoleted_by()]);
 202
 203                 par.params().read(lex);
 204
 205         } else if (token == "\\end_layout") {
 206                 lyxerr << "Solitary \\end_layout in line " << lex.getLineNo() << "\n"
 207                        << "Missing \\begin_layout?.\n";
 208         } else if (token == "\\end_inset") {
 209                 lyxerr << "Solitary \\end_inset in line " << lex.getLineNo() << "\n"
 210                        << "Missing \\begin_inset?.\n";
 211         } else if (token == "\\begin_inset") {
 212                 InsetBase * inset = readInset(lex, buf);
 213                 if (inset)
 214                         par.insertInset(par.size(), inset, font, change);
 215                 else {
 216                         lex.eatLine();
 217                         string line = lex.getString();
 218                         buf.error(ErrorItem(_("Unknown Inset"), line,
 219                                             par.id(), 0, par.size()));
 220                 }
 221         } else if (token == "\\family") {
 222                 lex.next();
 223                 font.setLyXFamily(lex.getString());
 224         } else if (token == "\\series") {
 225                 lex.next();
 226                 font.setLyXSeries(lex.getString());
 227         } else if (token == "\\shape") {
 228                 lex.next();
 229                 font.setLyXShape(lex.getString());
 230         } else if (token == "\\size") {
 231                 lex.next();
 232                 font.setLyXSize(lex.getString());
 233         } else if (token == "\\lang") {
 234                 lex.next();
 235                 string const tok = lex.getString();
 236                 Language const * lang = languages.getLanguage(tok);
 237                 if (lang) {
 238                         font.setLanguage(lang);
 239                 } else {
 240                         font.setLanguage(bp.language);
 241                         lex.printError("Unknown language `$$Token'");
 242                 }
 243         } else if (token == "\\numeric") {
 244                 lex.next();
 245                 font.setNumber(font.setLyXMisc(lex.getString()));
 246         } else if (token == "\\emph") {
 247                 lex.next();
 248                 font.setEmph(font.setLyXMisc(lex.getString()));
 249         } else if (token == "\\bar") {
 250                 lex.next();
 251                 string const tok = lex.getString();
 252
 253                 if (tok == "under")
 254                         font.setUnderbar(LyXFont::ON);
 255                 else if (tok == "no")
 256                         font.setUnderbar(LyXFont::OFF);
 257                 else if (tok == "default")
 258                         font.setUnderbar(LyXFont::INHERIT);
 259                 else
 260                         lex.printError("Unknown bar font flag "
 261                                        "`$$Token'");
 262         } else if (token == "\\noun") {
 263                 lex.next();
 264                 font.setNoun(font.setLyXMisc(lex.getString()));
 265         } else if (token == "\\color") {
 266                 lex.next();
 267                 font.setLyXColor(lex.getString());
 268         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 269
 270                 // Insets don't make sense in a free-spacing context! ---Kayvan
 271                 if (par.isFreeSpacing()) {
 272                         if (token == "\\InsetSpace")
 273                                 par.insertChar(par.size(), ' ', font, change);
 274                         else if (lex.isOK()) {
 275                                 lex.next();
 276                                 string const next_token = lex.getString();
 277                                 if (next_token == "\\-")
 278                                         par.insertChar(par.size(), '-', font, change);
 279                                 else {
 280                                         lex.printError("Token `$$Token' "
 281                                                        "is in free space "
 282                                                        "paragraph layout!");
 283                                 }
 284                         }
 285                 } else {
 286                         auto_ptr<InsetBase> inset;
 287                         if (token == "\\SpecialChar" )
 288                                 inset.reset(new InsetSpecialChar);
 289                         else
 290                                 inset.reset(new InsetSpace);
 291                         inset->read(buf, lex);
 292                         par.insertInset(par.size(), inset.release(),
 293                                         font, change);
 294                 }
 295         } else if (token == "\\i") {
 296                 auto_ptr<InsetBase> inset(new InsetLatexAccent);
 297                 inset->read(buf, lex);
 298                 par.insertInset(par.size(), inset.release(), font, change);
 299         } else if (token == "\\backslash") {
 300                 par.insertChar(par.size(), '\\', font, change);
 301         } else if (token == "\\newline") {
 302                 auto_ptr<InsetBase> inset(new InsetNewline);
 303                 inset->read(buf, lex);
 304                 par.insertInset(par.size(), inset.release(), font, change);
 305         } else if (token == "\\LyXTable") {
 306                 auto_ptr<InsetBase> inset(new InsetTabular(buf));
 307                 inset->read(buf, lex);
 308                 par.insertInset(par.size(), inset.release(), font, change);
 309         } else if (token == "\\bibitem") {
 310                 InsetCommandParams p("bibitem", "dummy");
 311                 auto_ptr<InsetBibitem> inset(new InsetBibitem(p));
 312                 inset->read(buf, lex);
 313                 par.insertInset(par.size(), inset.release(), font, change);
 314         } else if (token == "\\hfill") {
 315                 par.insertInset(par.size(), new InsetHFill, font, change);
 316         } else if (token == "\\lyxline") {
 317                 par.insertInset(par.size(), new InsetLine, font, change);
 318         } else if (token == "\\newpage") {
 319                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 320         } else if (token == "\\change_unchanged") {
 321                 // Hack ! Needed for empty paragraphs :/
 322                 // FIXME: is it still ??
 323                 if (!par.size())
 324                         par.cleanChanges();
 325                 change = Change(Change::UNCHANGED);
 326         } else if (token == "\\change_inserted") {
 327                 lex.nextToken();
 328                 std::istringstream is(lex.getString());
 329                 int aid;
 330                 lyx::time_type ct;
 331                 is >> aid >> ct;
 332                 change = Change(Change::INSERTED, bp.author_map[aid], ct);
 333         } else if (token == "\\change_deleted") {
 334                 lex.nextToken();
 335                 std::istringstream is(lex.getString());
 336                 int aid;
 337                 lyx::time_type ct;
 338                 is >> aid >> ct;
 339                 change = Change(Change::DELETED, bp.author_map[aid], ct);
 340         } else {
 341                 lex.eatLine();
 342                 buf.error(ErrorItem(_("Unknown token"),
 343                         bformat(_("Unknown token: %1$s %2$s\n"), token, lex.getString()),
 344                         par.id(), 0, par.size()));
 345         }
 346 }
 347
 348
 349 void readParagraph(Buffer const & buf, Paragraph & par, LyXLex & lex)
 350 {
 351         lex.nextToken();
 352         string token = lex.getString();
 353         LyXFont font;
 354
 355         while (lex.isOK()) {
 356
 357                 readParToken(buf, par, lex, token, font);
 358
 359                 lex.nextToken();
 360                 token = lex.getString();
 361
 362                 if (token.empty())
 363                         continue;
 364
 365                 if (token == "\\end_layout") {
 366                         //Ok, paragraph finished
 367                         break;
 368                 }
 369
 370                 lyxerr[Debug::PARSER] << "Handling paragraph token: `"
 371                                       << token << '\'' << endl;
 372                 if (token == "\\begin_layout" || token == "\\end_document"
 373                     || token == "\\end_inset" || token == "\\begin_deeper"
 374                     || token == "\\end_deeper") {
 375                         lex.pushToken(token);
 376                         lyxerr << "Paragraph ended in line "
 377                                << lex.getLineNo() << "\n"
 378                                << "Missing \\end_layout.\n";
 379                         break;
 380                 }
 381                 lyxerr << "Paragraph token unknown: `" << token << '\'' << endl;
 382         }
 383 }
 384
 385
 386 } // namespace anon
 387
 388
 389 BufferView * LyXText::bv()
 390 {
 391         BOOST_ASSERT(bv_owner != 0);
 392         return bv_owner;
 393 }
 394
 395
 396 BufferView * LyXText::bv() const
 397 {
 398         BOOST_ASSERT(bv_owner != 0);
 399         return bv_owner;
 400 }
 401
 402
 403 double LyXText::spacing(Paragraph const & par) const
 404 {
 405         if (par.params().spacing().isDefault())
 406                 return bv()->buffer()->params().spacing().getValue();
 407         return par.params().spacing().getValue();
 408 }
 409
 410
 411 void LyXText::updateParPositions()
 412 {
 413         par_type pit = 0;
 414         par_type end = pars_.size();
 415         for (height_ = 0; pit != end; ++pit) {
 416                 pars_[pit].y = height_;
 417                 height_ += pars_[pit].height;
 418         }
 419 }
 420
 421
 422 int LyXText::width() const
 423 {
 424         return width_;
 425 }
 426
 427
 428 int LyXText::height() const
 429 {
 430         return height_;
 431 }
 432
 433
 434 int LyXText::singleWidth(Paragraph const & par, pos_type pos) const
 435 {
 436         return singleWidth(par, pos, par.getChar(pos), getFont(par, pos));
 437 }
 438
 439
 440 int LyXText::singleWidth(Paragraph const & par,
 441                          pos_type pos, char c, LyXFont const & font) const
 442 {
 443         BOOST_ASSERT(pos < par.size());
 444
 445         // The most common case is handled first (Asger)
 446         if (IsPrintable(c)) {
 447                 if (font.language()->RightToLeft()) {
 448                         if ((lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 449                              lyxrc.font_norm_type == LyXRC::ISO_10646_1)
 450                             && font.language()->lang() == "arabic") {
 451                                 if (Encodings::IsComposeChar_arabic(c))
 452                                         return 0;
 453                                 else
 454                                         c = par.transformChar(c, pos);
 455                         } else if (font.language()->lang() == "hebrew" &&
 456                                    Encodings::IsComposeChar_hebrew(c))
 457                                 return 0;
 458                 }
 459                 return font_metrics::width(c, font);
 460         }
 461
 462         if (c == Paragraph::META_INSET)
 463                 return par.getInset(pos)->width();
 464
 465         if (IsSeparatorChar(c))
 466                 c = ' ';
 467         return font_metrics::width(c, font);
 468 }
 469
 470
 471 int LyXText::leftMargin(par_type pit) const
 472 {
 473         return leftMargin(pit, pars_[pit].size());
 474 }
 475
 476
 477 int LyXText::leftMargin(par_type const pit, pos_type const pos) const
 478 {
 479         Paragraph const & par = pars_[pit];
 480         LyXTextClass const & tclass =
 481                 bv()->buffer()->params().getLyXTextClass();
 482         LyXLayout_ptr const & layout = par.layout();
 483
 484         string parindent = layout->parindent;
 485
 486         int l_margin = 0;
 487
 488         if (xo_ == 0)
 489                 l_margin += changebarMargin();
 490
 491         l_margin += font_metrics::signedWidth(tclass.leftmargin(), tclass.defaultfont());
 492
 493         if (par.getDepth() != 0) {
 494         // find the next level paragraph
 495         par_type newpar = outerHook(pit, pars_);
 496                 if (newpar != par_type(pars_.size())) {
 497                         if (pars_[newpar].layout()->isEnvironment()) {
 498                                 l_margin = leftMargin(newpar);
 499                         }
 500                         if (par.layout() == tclass.defaultLayout()) {
 501                                 if (pars_[newpar].params().noindent())
 502                                         parindent.erase();
 503                                 else
 504                                         parindent = pars_[newpar].layout()->parindent;
 505                         }
 506                 }
 507         }
 508
 509         LyXFont const labelfont = getLabelFont(par);
 510         switch (layout->margintype) {
 511         case MARGIN_DYNAMIC:
 512                 if (!layout->leftmargin.empty())
 513                         l_margin += font_metrics::signedWidth(layout->leftmargin,
 514                                                   tclass.defaultfont());
 515                 if (!par.getLabelstring().empty()) {
 516                         l_margin += font_metrics::signedWidth(layout->labelindent,
 517                                                   labelfont);
 518                         l_margin += font_metrics::width(par.getLabelstring(),
 519                                             labelfont);
 520                         l_margin += font_metrics::width(layout->labelsep, labelfont);
 521                 }
 522                 break;
 523
 524         case MARGIN_MANUAL:
 525                 l_margin += font_metrics::signedWidth(layout->labelindent, labelfont);
 526                 // The width of an empty par, even with manual label, should be 0
 527                 if (!par.empty() && pos >= par.beginOfBody()) {
 528                         if (!par.getLabelWidthString().empty()) {
 529                                 l_margin += font_metrics::width(par.getLabelWidthString(),
 530                                                labelfont);
 531                                 l_margin += font_metrics::width(layout->labelsep, labelfont);
 532                         }
 533                 }
 534                 break;
 535
 536         case MARGIN_STATIC:
 537                 l_margin += font_metrics::signedWidth(layout->leftmargin, tclass.defaultfont()) * 4
 538                         / (par.getDepth() + 4);
 539                 break;
 540
 541         case MARGIN_FIRST_DYNAMIC:
 542                 if (layout->labeltype == LABEL_MANUAL) {
 543                         if (pos >= par.beginOfBody()) {
 544                                 l_margin += font_metrics::signedWidth(layout->leftmargin,
 545                                                           labelfont);
 546                         } else {
 547                                 l_margin += font_metrics::signedWidth(layout->labelindent,
 548                                                           labelfont);
 549                         }
 550                 } else if (pos != 0
 551                            // Special case to fix problems with
 552                            // theorems (JMarc)
 553                            || (layout->labeltype == LABEL_STATIC
 554                                && layout->latextype == LATEX_ENVIRONMENT
 555                                && !isFirstInSequence(pit, pars_))) {
 556                         l_margin += font_metrics::signedWidth(layout->leftmargin,
 557                                                   labelfont);
 558                 } else if (layout->labeltype != LABEL_TOP_ENVIRONMENT
 559                            && layout->labeltype != LABEL_BIBLIO
 560                            && layout->labeltype !=
 561                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 562                         l_margin += font_metrics::signedWidth(layout->labelindent,
 563                                                   labelfont);
 564                         l_margin += font_metrics::width(layout->labelsep, labelfont);
 565                         l_margin += font_metrics::width(par.getLabelstring(),
 566                                             labelfont);
 567                 }
 568                 break;
 569
 570         case MARGIN_RIGHT_ADDRESS_BOX: {
 571 #if 0
 572                 // ok, a terrible hack. The left margin depends on the widest
 573                 // row in this paragraph.
 574                 RowList::iterator rit = par.rows.begin();
 575                 RowList::iterator end = par.rows.end();
 576 #ifdef WITH_WARNINGS
 577 #warning This is wrong.
 578 #endif
 579                 int minfill = maxwidth_;
 580                 for ( ; rit != end; ++rit)
 581                         if (rit->fill() < minfill)
 582                                 minfill = rit->fill();
 583                 l_margin += font_metrics::signedWidth(layout->leftmargin,
 584                         tclass.defaultfont());
 585                 l_margin += minfill;
 586 #endif
 587                 // also wrong, but much shorter.
 588                 l_margin += maxwidth_ / 2;
 589                 break;
 590         }
 591         }
 592
 593         if (!par.params().leftIndent().zero())
 594                 l_margin += par.params().leftIndent().inPixels(maxwidth_);
 595
 596         LyXAlignment align;
 597
 598         if (par.params().align() == LYX_ALIGN_LAYOUT)
 599                 align = layout->align;
 600         else
 601                 align = par.params().align();
 602
 603         // set the correct parindent
 604         if (pos == 0
 605             && (layout->labeltype == LABEL_NO_LABEL
 606                || layout->labeltype == LABEL_TOP_ENVIRONMENT
 607                || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 608                || (layout->labeltype == LABEL_STATIC
 609                    && layout->latextype == LATEX_ENVIRONMENT
 610                    && !isFirstInSequence(pit, pars_)))
 611             && align == LYX_ALIGN_BLOCK
 612             && !par.params().noindent()
 613             // in tabulars and ert paragraphs are never indented!
 614             && (par.ownerCode() != InsetBase::TEXT_CODE
 615                     && par.ownerCode() != InsetBase::ERT_CODE)
 616             && (par.layout() != tclass.defaultLayout()
 617                 || bv()->buffer()->params().paragraph_separation ==
 618                    BufferParams::PARSEP_INDENT))
 619         {
 620                 l_margin += font_metrics::signedWidth(parindent, tclass.defaultfont());
 621         }
 622
 623         return l_margin;
 624 }
 625
 626
 627 int LyXText::rightMargin(Paragraph const & par) const
 628 {
 629         LyXTextClass const & tclass = bv()->buffer()->params().getLyXTextClass();
 630
 631         // We do not want rightmargins on inner texts.
 632         if (bv()->text() != this)
 633                 return 0;
 634
 635         int const r_margin =
 636                 ::rightMargin()
 637                 + font_metrics::signedWidth(tclass.rightmargin(),
 638                                             tclass.defaultfont())
 639                 + font_metrics::signedWidth(par.layout()->rightmargin,
 640                                             tclass.defaultfont())
 641                 * 4 / (par.getDepth() + 4);
 642
 643         return r_margin;
 644
 645 }
 646
 647
 648 int LyXText::labelEnd(par_type const pit) const
 649 {
 650         // labelEnd is only needed if the layout fills a flushleft label.
 651         if (pars_[pit].layout()->margintype != MARGIN_MANUAL)
 652                 return 0;
 653         // return the beginning of the body
 654         return leftMargin(pit);
 655 }
 656
 657
 658 namespace {
 659
 660 // this needs special handling - only newlines count as a break point
 661 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
 662 {
 663         pos_type const end = par.size();
 664
 665         for (; i < end; ++i)
 666                 if (par.isNewline(i))
 667                         return i + 1;
 668
 669         return end;
 670 }
 671
 672 };
 673
 674
 675 void LyXText::rowBreakPoint(par_type const pit, Row & row) const
 676 {
 677         Paragraph const & par = pars_[pit];
 678         pos_type const end = par.size();
 679         pos_type const pos = row.pos();
 680         if (pos == end) {
 681                 row.endpos(end);
 682                 return;
 683         }
 684
 685         // maximum pixel width of a row
 686         int width = maxwidth_ - rightMargin(par); // - leftMargin(pit, row);
 687         if (width < 0) {
 688                 row.endpos(end);
 689                 return;
 690         }
 691
 692         LyXLayout_ptr const & layout = par.layout();
 693
 694         if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX) {
 695                 row.endpos(addressBreakPoint(pos, par));
 696                 return;
 697         }
 698
 699         pos_type const body_pos = par.beginOfBody();
 700
 701
 702         // Now we iterate through until we reach the right margin
 703         // or the end of the par, then choose the possible break
 704         // nearest that.
 705
 706         int const left = leftMargin(pit, pos);
 707         int x = left;
 708
 709         // pixel width since last breakpoint
 710         int chunkwidth = 0;
 711
 712         FontIterator fi = FontIterator(*this, pit, pos);
 713         pos_type point = end;
 714         pos_type i = pos;
 715         for ( ; i < end; ++i, ++fi) {
 716                 char const c = par.getChar(i);
 717
 718                 {
 719                         int thiswidth = singleWidth(par, i, c, *fi);
 720
 721                         // add the auto-hfill from label end to the body
 722                         if (body_pos && i == body_pos) {
 723                                 int add = font_metrics::width(layout->labelsep, getLabelFont(par));
 724                                 if (par.isLineSeparator(i - 1))
 725                                         add -= singleWidth(par, i - 1);
 726
 727                                 add = std::max(add, labelEnd(pit) - x);
 728                                 thiswidth += add;
 729                         }
 730
 731                         x += thiswidth;
 732                         chunkwidth += thiswidth;
 733                 }
 734
 735                 // break before a character that will fall off
 736                 // the right of the row
 737                 if (x >= width) {
 738                         // if no break before, break here
 739                         if (point == end || chunkwidth >= width - left) {
 740                                 if (i > pos)
 741                                         point = i;
 742                                 else
 743                                         point = i + 1;
 744
 745                         }
 746                         // exit on last registered breakpoint:
 747                         break;
 748                 }
 749
 750                 if (par.isNewline(i)) {
 751                         point = i + 1;
 752                         break;
 753                 }
 754                 // Break before...
 755                 if (i + 1 < end) {
 756                         if (par.isInset(i + 1) && par.getInset(i + 1)->display()) {
 757                                 point = i + 1;
 758                                 break;
 759                         }
 760                         // ...and after.
 761                         if (par.isInset(i) && par.getInset(i)->display()) {
 762                                 point = i + 1;
 763                                 break;
 764                         }
 765                 }
 766
 767                 if (!par.isInset(i) || par.getInset(i)->isChar()) {
 768                         // some insets are line separators too
 769                         if (par.isLineSeparator(i)) {
 770                                 // register breakpoint:
 771                                 point = i + 1;
 772                                 chunkwidth = 0;
 773                         }
 774                 }
 775         }
 776
 777         // maybe found one, but the par is short enough.
 778         if (i == end && x < width)
 779                 point = end;
 780
 781         // manual labels cannot be broken in LaTeX. But we
 782         // want to make our on-screen rendering of footnotes
 783         // etc. still break
 784         if (body_pos && point < body_pos)
 785                 point = body_pos;
 786
 787         row.endpos(point);
 788 }
 789
 790
 791 void LyXText::setRowWidth(par_type const pit, Row & row) const
 792 {
 793         // get the pure distance
 794         pos_type const end = row.endpos();
 795
 796         Paragraph const & par = pars_[pit];
 797         string labelsep = par.layout()->labelsep;
 798         int w = leftMargin(pit, row.pos());
 799
 800         pos_type const body_pos = par.beginOfBody();
 801         pos_type i = row.pos();
 802
 803         if (i < end) {
 804                 FontIterator fi = FontIterator(*this, pit, i);
 805                 for ( ; i < end; ++i, ++fi) {
 806                         if (body_pos > 0 && i == body_pos) {
 807                                 w += font_metrics::width(labelsep, getLabelFont(par));
 808                                 if (par.isLineSeparator(i - 1))
 809                                         w -= singleWidth(par, i - 1);
 810                                 w = max(w, labelEnd(pit));
 811                         }
 812                         char const c = par.getChar(i);
 813                         w += singleWidth(par, i, c, *fi);
 814                 }
 815         }
 816
 817         if (body_pos > 0 && body_pos >= end) {
 818                 w += font_metrics::width(labelsep, getLabelFont(par));
 819                 if (end > 0 && par.isLineSeparator(end - 1))
 820                         w -= singleWidth(par, end - 1);
 821                 w = max(w, labelEnd(pit));
 822         }
 823
 824         row.width(w + rightMargin(par));
 825 }
 826
 827
 828 // returns the minimum space a manual label needs on the screen in pixel
 829 int LyXText::labelFill(Paragraph const & par, Row const & row) const
 830 {
 831         pos_type last = par.beginOfBody();
 832
 833         BOOST_ASSERT(last > 0);
 834
 835         // -1 because a label ends with a space that is in the label
 836         --last;
 837
 838         // a separator at this end does not count
 839         if (par.isLineSeparator(last))
 840                 --last;
 841
 842         int w = 0;
 843         for (pos_type i = row.pos(); i <= last; ++i)
 844                 w += singleWidth(par, i);
 845
 846         string const & label = par.params().labelWidthString();
 847         if (label.empty())
 848                 return 0;
 849
 850         return max(0, font_metrics::width(label, getLabelFont(par)) - w);
 851 }
 852
 853
 854 LColor_color LyXText::backgroundColor() const
 855 {
 856         return LColor_color(LColor::color(background_color_));
 857 }
 858
 859
 860 void LyXText::setHeightOfRow(par_type const pit, Row & row)
 861 {
 862         Paragraph const & par = pars_[pit];
 863         // get the maximum ascent and the maximum descent
 864         double layoutasc = 0;
 865         double layoutdesc = 0;
 866         double const dh = defaultRowHeight();
 867
 868         // ok, let us initialize the maxasc and maxdesc value.
 869         // Only the fontsize count. The other properties
 870         // are taken from the layoutfont. Nicer on the screen :)
 871         LyXLayout_ptr const & layout = par.layout();
 872
 873         // as max get the first character of this row then it can
 874         // increase but not decrease the height. Just some point to
 875         // start with so we don't have to do the assignment below too
 876         // often.
 877         LyXFont font = getFont(par, row.pos());
 878         LyXFont::FONT_SIZE const tmpsize = font.size();
 879         font = getLayoutFont(pit);
 880         LyXFont::FONT_SIZE const size = font.size();
 881         font.setSize(tmpsize);
 882
 883         LyXFont labelfont = getLabelFont(par);
 884
 885         // these are minimum values
 886         double const spacing_val = layout->spacing.getValue() * spacing(par);
 887         //lyxerr << "spacing_val = " << spacing_val << endl;
 888         int maxasc  = int(font_metrics::maxAscent(font)  * spacing_val);
 889         int maxdesc = int(font_metrics::maxDescent(font) * spacing_val);
 890
 891         // insets may be taller
 892         InsetList::const_iterator ii = par.insetlist.begin();
 893         InsetList::const_iterator iend = par.insetlist.end();
 894         for ( ; ii != iend; ++ii) {
 895                 if (ii->pos >= row.pos() && ii->pos < row.endpos()) {
 896                         maxasc  = max(maxasc,  ii->inset->ascent());
 897                         maxdesc = max(maxdesc, ii->inset->descent());
 898                 }
 899         }
 900
 901         // Check if any custom fonts are larger (Asger)
 902         // This is not completely correct, but we can live with the small,
 903         // cosmetic error for now.
 904         int labeladdon = 0;
 905         pos_type const pos_end = row.endpos();
 906
 907         LyXFont::FONT_SIZE maxsize =
 908                 par.highestFontInRange(row.pos(), pos_end, size);
 909         if (maxsize > font.size()) {
 910                 font.setSize(maxsize);
 911                 maxasc  = max(maxasc,  font_metrics::maxAscent(font));
 912                 maxdesc = max(maxdesc, font_metrics::maxDescent(font));
 913         }
 914
 915         // This is nicer with box insets:
 916         ++maxasc;
 917         ++maxdesc;
 918
 919         row.ascent_of_text(maxasc);
 920
 921         // is it a top line?
 922         if (row.pos() == 0) {
 923                 BufferParams const & bufparams = bv()->buffer()->params();
 924                 // some parksips VERY EASY IMPLEMENTATION
 925                 if (bv()->buffer()->params().paragraph_separation
 926                     == BufferParams::PARSEP_SKIP
 927                         && pit != 0
 928                         && ((layout->isParagraph() && par.getDepth() == 0)
 929                             || (pars_[pit - 1].layout()->isParagraph()
 930                                 && pars_[pit - 1].getDepth() == 0)))
 931                 {
 932                                 maxasc += bufparams.getDefSkip().inPixels(*bv());
 933                 }
 934
 935                 if (pars_[pit].params().startOfAppendix())
 936                         maxasc += int(3 * dh);
 937
 938                 // This is special code for the chapter, since the label of this
 939                 // layout is printed in an extra row
 940                 if (layout->counter == "chapter" && bufparams.secnumdepth >= 0) {
 941                         labeladdon = int(font_metrics::maxHeight(labelfont)
 942                                      * layout->spacing.getValue()
 943                                      * spacing(par));
 944                 }
 945
 946                 // special code for the top label
 947                 if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
 948                      || layout->labeltype == LABEL_BIBLIO
 949                      || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
 950                     && isFirstInSequence(pit, paragraphs())
 951                     && !par.getLabelstring().empty())
 952                 {
 953                         labeladdon = int(
 954                                   font_metrics::maxHeight(labelfont)
 955                                         * layout->spacing.getValue()
 956                                         * spacing(par)
 957                                 + (layout->topsep + layout->labelbottomsep) * dh);
 958                 }
 959
 960                 // Add the layout spaces, for example before and after
 961                 // a section, or between the items of a itemize or enumerate
 962                 // environment.
 963
 964                 par_type prev = depthHook(pit, pars_, par.getDepth());
 965                 if (prev != pit
 966                     && pars_[prev].layout() == layout
 967                     && pars_[prev].getDepth() == par.getDepth()
 968                     && pars_[prev].getLabelWidthString() == par.getLabelWidthString())
 969                 {
 970                         layoutasc = layout->itemsep * dh;
 971                 } else if (pit != 0 || row.pos() != 0) {
 972                         if (layout->topsep > 0)
 973                                 layoutasc = layout->topsep * dh;
 974                 }
 975
 976                 prev = outerHook(pit, pars_);
 977                 if (prev != par_type(pars_.size())) {
 978                         maxasc += int(pars_[prev].layout()->parsep * dh);
 979                 } else if (pit != 0) {
 980                         if (pars_[pit - 1].getDepth() != 0 ||
 981                                         pars_[pit - 1].layout() == layout) {
 982                                 maxasc += int(layout->parsep * dh);
 983                         }
 984                 }
 985         }
 986
 987         // is it a bottom line?
 988         if (row.endpos() >= par.size()) {
 989                 // add the layout spaces, for example before and after
 990                 // a section, or between the items of a itemize or enumerate
 991                 // environment
 992                 par_type nextpit = pit + 1;
 993                 if (nextpit != par_type(pars_.size())) {
 994                         par_type cpit = pit;
 995                         double usual = 0;
 996                         double unusual = 0;
 997
 998                         if (pars_[cpit].getDepth() > pars_[nextpit].getDepth()) {
 999                                 usual = pars_[cpit].layout()->bottomsep * dh;
1000                                 cpit = depthHook(cpit, paragraphs(), pars_[nextpit].getDepth());
1001                                 if (pars_[cpit].layout() != pars_[nextpit].layout()
1002                                         || pars_[nextpit].getLabelWidthString() != pars_[cpit].getLabelWidthString())
1003                                 {
1004                                         unusual = pars_[cpit].layout()->bottomsep * dh;
1005                                 }
1006                                 layoutdesc = max(unusual, usual);
1007                         } else if (pars_[cpit].getDepth() == pars_[nextpit].getDepth()) {
1008                                 if (pars_[cpit].layout() != pars_[nextpit].layout()
1009                                         || pars_[nextpit].getLabelWidthString() != pars_[cpit].getLabelWidthString())
1010                                         layoutdesc = int(pars_[cpit].layout()->bottomsep * dh);
1011                         }
1012                 }
1013         }
1014
1015         // incalculate the layout spaces
1016         maxasc  += int(layoutasc  * 2 / (2 + pars_[pit].getDepth()));
1017         maxdesc += int(layoutdesc * 2 / (2 + pars_[pit].getDepth()));
1018
1019         row.height(maxasc + maxdesc + labeladdon);
1020         row.baseline(maxasc + labeladdon);
1021         row.top_of_text(row.baseline() - font_metrics::maxAscent(font));
1022 }
1023
1024
1025 namespace {
1026
1027 }
1028
1029 void LyXText::breakParagraph(LCursor & cur, char keep_layout)
1030 {
1031         BOOST_ASSERT(this == cur.text());
1032         // allow only if at start or end, or all previous is new text
1033         Paragraph & cpar = cur.paragraph();
1034         par_type cpit = cur.par();
1035
1036         if (cur.pos() != 0 && cur.pos() != cur.lastpos()
1037             && cpar.isChangeEdited(0, cur.pos()))
1038                 return;
1039
1040         LyXTextClass const & tclass = cur.buffer().params().getLyXTextClass();
1041         LyXLayout_ptr const & layout = cpar.layout();
1042
1043         // this is only allowed, if the current paragraph is not empty
1044         // or caption and if it has not the keepempty flag active
1045         if (cur.lastpos() == 0 && !cpar.allowEmpty()
1046            && layout->labeltype != LABEL_SENSITIVE)
1047                 return;
1048
1049         // a layout change may affect also the following paragraph
1050         recUndo(cur.par(), undoSpan(cur.par()) - 1);
1051
1052         // Always break behind a space
1053         // It is better to erase the space (Dekel)
1054         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
1055                 cpar.erase(cur.pos());
1056
1057         // break the paragraph
1058         if (keep_layout)
1059                 keep_layout = 2;
1060         else
1061                 keep_layout = layout->isEnvironment();
1062
1063         // we need to set this before we insert the paragraph. IMO the
1064         // breakParagraph call should return a bool if it inserts the
1065         // paragraph before or behind and we should react on that one
1066         // but we can fix this in 1.3.0 (Jug 20020509)
1067         bool const isempty = cpar.allowEmpty() && cpar.empty();
1068         ::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
1069                          cur.pos(), keep_layout);
1070
1071         cpit = cur.par();
1072         par_type next_par = cpit + 1;
1073
1074         // well this is the caption hack since one caption is really enough
1075         if (layout->labeltype == LABEL_SENSITIVE) {
1076                 if (cur.pos() == 0)
1077                         // set to standard-layout
1078                         pars_[cpit].applyLayout(tclass.defaultLayout());
1079                 else
1080                         // set to standard-layout
1081                         pars_[next_par].applyLayout(tclass.defaultLayout());
1082         }
1083
1084         // if the cursor is at the beginning of a row without prior newline,
1085         // move one row up!
1086         // This touches only the screen-update. Otherwise we would may have
1087         // an empty row on the screen
1088         if (cur.pos() != 0 && cur.textRow().pos() == cur.pos()
1089             && !pars_[cpit].isNewline(cur.pos() - 1))
1090         {
1091                 cursorLeft(cur);
1092         }
1093
1094         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0))
1095                 pars_[next_par].erase(0);
1096
1097         updateCounters();
1098         redoParagraph(cpit);
1099         redoParagraph(next_par);
1100
1101         // This check is necessary. Otherwise the new empty paragraph will
1102         // be deleted automatically. And it is more friendly for the user!
1103         if (cur.pos() != 0 || isempty)
1104                 setCursor(cur, cur.par() + 1, 0);
1105         else
1106                 setCursor(cur, cur.par(), 0);
1107 }
1108
1109
1110 // convenience function
1111 void LyXText::redoParagraph(LCursor & cur)
1112 {
1113         BOOST_ASSERT(this == cur.text());
1114         cur.clearSelection();
1115         redoParagraph(cur.par());
1116         setCursorIntern(cur, cur.par(), cur.pos());
1117 }
1118
1119
1120 // insert a character, moves all the following breaks in the
1121 // same Paragraph one to the right and make a rebreak
1122 void LyXText::insertChar(LCursor & cur, char c)
1123 {
1124         BOOST_ASSERT(this == cur.text());
1125         BOOST_ASSERT(c != Paragraph::META_INSET);
1126
1127         recordUndo(cur, Undo::INSERT);
1128
1129         Paragraph & par = cur.paragraph();
1130         // try to remove this
1131         par_type const pit = cur.par();
1132
1133         bool const freeSpacing = par.layout()->free_spacing ||
1134                 par.isFreeSpacing();
1135
1136         if (lyxrc.auto_number) {
1137                 static string const number_operators = "+-/*";
1138                 static string const number_unary_operators = "+-";
1139                 static string const number_seperators = ".,:";
1140
1141                 if (current_font.number() == LyXFont::ON) {
1142                         if (!IsDigit(c) && !contains(number_operators, c) &&
1143                             !(contains(number_seperators, c) &&
1144                               cur.pos() != 0 &&
1145                               cur.pos() != cur.lastpos() &&
1146                               getFont(par, cur.pos()).number() == LyXFont::ON &&
1147                               getFont(par, cur.pos() - 1).number() == LyXFont::ON)
1148                            )
1149                                 number(cur); // Set current_font.number to OFF
1150                 } else if (IsDigit(c) &&
1151                            real_current_font.isVisibleRightToLeft()) {
1152                         number(cur); // Set current_font.number to ON
1153
1154                         if (cur.pos() != 0) {
1155                                 char const c = par.getChar(cur.pos() - 1);
1156                                 if (contains(number_unary_operators, c) &&
1157                                     (cur.pos() == 1
1158                                      || par.isSeparator(cur.pos() - 2)
1159                                      || par.isNewline(cur.pos() - 2))
1160                                   ) {
1161                                         setCharFont(pit, cur.pos() - 1, current_font);
1162                                 } else if (contains(number_seperators, c)
1163                                      && cur.pos() >= 2
1164                                      && getFont(par, cur.pos() - 2).number() == LyXFont::ON) {
1165                                         setCharFont(pit, cur.pos() - 1, current_font);
1166                                 }
1167                         }
1168                 }
1169         }
1170
1171         // First check, if there will be two blanks together or a blank at
1172         // the beginning of a paragraph.
1173         // I decided to handle blanks like normal characters, the main
1174         // difference are the special checks when calculating the row.fill
1175         // (blank does not count at the end of a row) and the check here
1176
1177         // The bug is triggered when we type in a description environment:
1178         // The current_font is not changed when we go from label to main text
1179         // and it should (along with realtmpfont) when we type the space.
1180         // CHECK There is a bug here! (Asger)
1181
1182         // store the current font.  This is because of the use of cursor
1183         // movements. The moving cursor would refresh the current font
1184         LyXFont realtmpfont = real_current_font;
1185         LyXFont rawtmpfont = current_font;
1186
1187         // When the free-spacing option is set for the current layout,
1188         // disable the double-space checking
1189         if (!freeSpacing && IsLineSeparatorChar(c)) {
1190                 if (cur.pos() == 0) {
1191                         static bool sent_space_message = false;
1192                         if (!sent_space_message) {
1193                                 cur.message(_("You cannot insert a space at the "
1194                                         "beginning of a paragraph. Please read the Tutorial."));
1195                                 sent_space_message = true;
1196                                 return;
1197                         }
1198                 }
1199                 BOOST_ASSERT(cur.pos() > 0);
1200                 if (par.isLineSeparator(cur.pos() - 1)
1201                     || par.isNewline(cur.pos() - 1)) {
1202                         static bool sent_space_message = false;
1203                         if (!sent_space_message) {
1204                                 cur.message(_("You cannot type two spaces this way. "
1205                                         "Please read the Tutorial."));
1206                                 sent_space_message = true;
1207                         }
1208                         return;
1209                 }
1210         }
1211
1212         par.insertChar(cur.pos(), c, rawtmpfont);
1213
1214         current_font = rawtmpfont;
1215         real_current_font = realtmpfont;
1216         redoParagraph(cur);
1217         setCursor(cur, cur.par(), cur.pos() + 1, false, cur.boundary());
1218         charInserted();
1219 }
1220
1221
1222 void LyXText::charInserted()
1223 {
1224         // Here we call finishUndo for every 20 characters inserted.
1225         // This is from my experience how emacs does it. (Lgb)
1226         static unsigned int counter;
1227         if (counter < 20) {
1228                 ++counter;
1229         } else {
1230                 finishUndo();
1231                 counter = 0;
1232         }
1233 }
1234
1235
1236 RowMetrics LyXText::computeRowMetrics(par_type const pit, Row const & row) const
1237 {
1238         RowMetrics result;
1239         Paragraph const & par = pars_[pit];
1240
1241         double w = width_ - row.width();
1242
1243         bool const is_rtl = isRTL(par);
1244         if (is_rtl)
1245                 result.x = rightMargin(par);
1246         else
1247                 result.x = leftMargin(pit, row.pos());
1248
1249         // is there a manual margin with a manual label
1250         LyXLayout_ptr const & layout = par.layout();
1251
1252         if (layout->margintype == MARGIN_MANUAL
1253             && layout->labeltype == LABEL_MANUAL) {
1254                 /// We might have real hfills in the label part
1255                 int nlh = numberOfLabelHfills(par, row);
1256
1257                 // A manual label par (e.g. List) has an auto-hfill
1258                 // between the label text and the body of the
1259                 // paragraph too.
1260                 // But we don't want to do this auto hfill if the par
1261                 // is empty.
1262                 if (!par.empty())
1263                         ++nlh;
1264
1265                 if (nlh && !par.getLabelWidthString().empty())
1266                         result.label_hfill = labelFill(par, row) / double(nlh);
1267         }
1268
1269         // are there any hfills in the row?
1270         int const nh = numberOfHfills(par, row);
1271
1272         if (nh) {
1273                 if (w > 0)
1274                         result.hfill = w / nh;
1275         // we don't have to look at the alignment if it is ALIGN_LEFT and
1276         // if the row is already larger then the permitted width as then
1277         // we force the LEFT_ALIGN'edness!
1278         } else if (int(row.width()) < maxwidth_) {
1279                 // is it block, flushleft or flushright?
1280                 // set x how you need it
1281                 int align;
1282                 if (par.params().align() == LYX_ALIGN_LAYOUT)
1283                         align = layout->align;
1284                 else
1285                         align = par.params().align();
1286
1287                 // Display-style insets should always be on a centred row
1288                 // The test on par.size() is to catch zero-size pars, which
1289                 // would trigger the assert in Paragraph::getInset().
1290                 //inset = par.size() ? par.getInset(row.pos()) : 0;
1291                 if (!par.empty()
1292                     && par.isInset(row.pos())
1293                     && par.getInset(row.pos())->display())
1294                 {
1295                         align = LYX_ALIGN_CENTER;
1296                 }
1297
1298                 switch (align) {
1299                 case LYX_ALIGN_BLOCK: {
1300                         int const ns = numberOfSeparators(par, row);
1301                         bool disp_inset = false;
1302                         if (row.endpos() < par.size()) {
1303                                 InsetBase const * in = par.getInset(row.endpos());
1304                                 if (in)
1305                                         disp_inset = in->display();
1306                         }
1307                         // If we have separators, this is not the last row of a
1308                         // par, does not end in newline, and is not row above a
1309                         // display inset... then stretch it
1310                         if (ns
1311                             && row.endpos() < par.size()
1312                             && !par.isNewline(row.endpos() - 1)
1313                             && !disp_inset
1314                                 ) {
1315                                 result.separator = w / ns;
1316                         } else if (is_rtl) {
1317                                 result.x += w;
1318                         }
1319                         break;
1320                 }
1321                 case LYX_ALIGN_RIGHT:
1322                         result.x += w;
1323                         break;
1324                 case LYX_ALIGN_CENTER:
1325                         result.x += w / 2;
1326                         break;
1327                 }
1328         }
1329
1330         bidi.computeTables(par, *bv()->buffer(), row);
1331         if (is_rtl) {
1332                 pos_type body_pos = par.beginOfBody();
1333                 pos_type end = row.endpos();
1334
1335                 if (body_pos > 0
1336                     && (body_pos > end || !par.isLineSeparator(body_pos - 1)))
1337                 {
1338                         result.x += font_metrics::width(layout->labelsep, getLabelFont(par));
1339                         if (body_pos <= end)
1340                                 result.x += result.label_hfill;
1341                 }
1342         }
1343
1344         return result;
1345 }
1346
1347
1348 // the cursor set functions have a special mechanism. When they
1349 // realize, that you left an empty paragraph, they will delete it.
1350
1351 void LyXText::cursorRightOneWord(LCursor & cur)
1352 {
1353         BOOST_ASSERT(this == cur.text());
1354         if (cur.pos() == cur.lastpos() && cur.par() != cur.lastpar()) {
1355                 ++cur.par();
1356                 cur.pos() = 0;
1357         } else {
1358                 // Skip through initial nonword stuff.
1359                 // Treat floats and insets as words.
1360                 while (cur.pos() != cur.lastpos() && !cur.paragraph().isWord(cur.pos()))
1361                         ++cur.pos();
1362                 // Advance through word.
1363                 while (cur.pos() != cur.lastpos() && cur.paragraph().isWord(cur.pos()))
1364                         ++cur.pos();
1365         }
1366         setCursor(cur, cur.par(), cur.pos());
1367 }
1368
1369
1370 void LyXText::cursorLeftOneWord(LCursor & cur)
1371 {
1372         BOOST_ASSERT(this == cur.text());
1373         if (cur.pos() == 0 && cur.par() != 0) {
1374                 --cur.par();
1375                 cur.pos() = cur.lastpos();
1376         } else {
1377                 // Skip through initial nonword stuff.
1378                 // Treat floats and insets as words.
1379                 while (cur.pos() != 0 && !cur.paragraph().isWord(cur.pos() - 1))
1380                         --cur.pos();
1381                 // Advance through word.
1382                 while (cur.pos() != 0 && cur.paragraph().isWord(cur.pos() - 1))
1383                         --cur.pos();
1384         }
1385         setCursor(cur, cur.par(), cur.pos());
1386 }
1387
1388
1389 void LyXText::selectWord(LCursor & cur, word_location loc)
1390 {
1391         BOOST_ASSERT(this == cur.text());
1392         CursorSlice from = cur.top();
1393         CursorSlice to = cur.top();
1394         getWord(from, to, loc);
1395         if (cur.top() != from)
1396                 setCursor(cur, from.par(), from.pos());
1397         if (to == from)
1398                 return;
1399         cur.resetAnchor();
1400         setCursor(cur, to.par(), to.pos());
1401         cur.setSelection();
1402 }
1403
1404
1405 // Select the word currently under the cursor when no
1406 // selection is currently set
1407 bool LyXText::selectWordWhenUnderCursor(LCursor & cur, word_location loc)
1408 {
1409         BOOST_ASSERT(this == cur.text());
1410         if (cur.selection())
1411                 return false;
1412         selectWord(cur, loc);
1413         return cur.selection();
1414 }
1415
1416
1417 void LyXText::acceptChange(LCursor & cur)
1418 {
1419         BOOST_ASSERT(this == cur.text());
1420         if (!cur.selection() && cur.lastpos() != 0)
1421                 return;
1422
1423         CursorSlice const & startc = cur.selBegin();
1424         CursorSlice const & endc = cur.selEnd();
1425         if (startc.par() == endc.par()) {
1426                 recordUndoSelection(cur, Undo::INSERT);
1427                 pars_[startc.par()].acceptChange(startc.pos(), endc.pos());
1428                 finishUndo();
1429                 cur.clearSelection();
1430                 redoParagraph(startc.par());
1431                 setCursorIntern(cur, startc.par(), 0);
1432         }
1433 #ifdef WITH_WARNINGS
1434 #warning handle multi par selection
1435 #endif
1436 }
1437
1438
1439 void LyXText::rejectChange(LCursor & cur)
1440 {
1441         BOOST_ASSERT(this == cur.text());
1442         if (!cur.selection() && cur.lastpos() != 0)
1443                 return;
1444
1445         CursorSlice const & startc = cur.selBegin();
1446         CursorSlice const & endc = cur.selEnd();
1447         if (startc.par() == endc.par()) {
1448                 recordUndoSelection(cur, Undo::INSERT);
1449                 pars_[startc.par()].rejectChange(startc.pos(), endc.pos());
1450                 finishUndo();
1451                 cur.clearSelection();
1452                 redoParagraph(startc.par());
1453                 setCursorIntern(cur, startc.par(), 0);
1454         }
1455 #ifdef WITH_WARNINGS
1456 #warning handle multi par selection
1457 #endif
1458 }
1459
1460
1461 // Delete from cursor up to the end of the current or next word.
1462 void LyXText::deleteWordForward(LCursor & cur)
1463 {
1464         BOOST_ASSERT(this == cur.text());
1465         if (cur.lastpos() == 0)
1466                 cursorRight(cur);
1467         else {
1468                 cur.resetAnchor();
1469                 cur.selection() = true;
1470                 cursorRightOneWord(cur);
1471                 cur.setSelection();
1472                 cutSelection(cur, true, false);
1473         }
1474 }
1475
1476
1477 // Delete from cursor to start of current or prior word.
1478 void LyXText::deleteWordBackward(LCursor & cur)
1479 {
1480         BOOST_ASSERT(this == cur.text());
1481         if (cur.lastpos() == 0)
1482                 cursorLeft(cur);
1483         else {
1484                 cur.resetAnchor();
1485                 cur.selection() = true;
1486                 cursorLeftOneWord(cur);
1487                 cur.setSelection();
1488                 cutSelection(cur, true, false);
1489         }
1490 }
1491
1492
1493 // Kill to end of line.
1494 void LyXText::deleteLineForward(LCursor & cur)
1495 {
1496         BOOST_ASSERT(this == cur.text());
1497         if (cur.lastpos() == 0) {
1498                 // Paragraph is empty, so we just go to the right
1499                 cursorRight(cur);
1500         } else {
1501                 cur.resetAnchor();
1502                 cur.selection() = true; // to avoid deletion
1503                 cursorEnd(cur);
1504                 cur.setSelection();
1505                 // What is this test for ??? (JMarc)
1506                 if (!cur.selection())
1507                         deleteWordForward(cur);
1508                 else
1509                         cutSelection(cur, true, false);
1510         }
1511 }
1512
1513
1514 void LyXText::changeCase(LCursor & cur, LyXText::TextCase action)
1515 {
1516         BOOST_ASSERT(this == cur.text());
1517         CursorSlice from;
1518         CursorSlice to;
1519
1520         if (cur.selection()) {
1521                 from = cur.selBegin();
1522                 to = cur.selEnd();
1523         } else {
1524                 from = cur.top();
1525                 getWord(from, to, lyx::PARTIAL_WORD);
1526                 setCursor(cur, to.par(), to.pos() + 1);
1527         }
1528
1529         recordUndoSelection(cur);
1530
1531         pos_type pos = from.pos();
1532         int par = from.par();
1533
1534         while (par != int(pars_.size()) && (pos != to.pos() || par != to.par())) {
1535                 par_type pit = par;
1536                 if (pos == pars_[pit].size()) {
1537                         ++par;
1538                         pos = 0;
1539                         continue;
1540                 }
1541                 unsigned char c = pars_[pit].getChar(pos);
1542                 if (c != Paragraph::META_INSET) {
1543                         switch (action) {
1544                         case text_lowercase:
1545                                 c = lowercase(c);
1546                                 break;
1547                         case text_capitalization:
1548                                 c = uppercase(c);
1549                                 action = text_lowercase;
1550                                 break;
1551                         case text_uppercase:
1552                                 c = uppercase(c);
1553                                 break;
1554                         }
1555                 }
1556 #ifdef WITH_WARNINGS
1557 #warning changes
1558 #endif
1559                 pars_[pit].setChar(pos, c);
1560                 ++pos;
1561         }
1562 }
1563
1564
1565 void LyXText::Delete(LCursor & cur)
1566 {
1567         BOOST_ASSERT(this == cur.text());
1568         if (cur.pos() != cur.lastpos()) {
1569                 recordUndo(cur, Undo::DELETE, cur.par());
1570                 setCursorIntern(cur, cur.par(), cur.pos() + 1, false, cur.boundary());
1571                 backspace(cur);
1572         }
1573         // should we do anything in an else branch?
1574 }
1575
1576
1577 void LyXText::backspace(LCursor & cur)
1578 {
1579         BOOST_ASSERT(this == cur.text());
1580         if (cur.pos() == 0) {
1581                 // The cursor is at the beginning of a paragraph, so
1582                 // the the backspace will collapse two paragraphs into
1583                 // one.
1584
1585                 // but it's not allowed unless it's new
1586                 Paragraph & par = cur.paragraph();
1587                 if (par.isChangeEdited(0, par.size()))
1588                         return;
1589
1590                 // we may paste some paragraphs
1591
1592                 // is it an empty paragraph?
1593                 pos_type lastpos = cur.lastpos();
1594                 if (lastpos == 0 || (lastpos == 1 && par.isSeparator(0))) {
1595                         // This is an empty paragraph and we delete it just
1596                         // by moving the cursor one step
1597                         // left and let the DeleteEmptyParagraphMechanism
1598                         // handle the actual deletion of the paragraph.
1599
1600                         if (cur.par() != 0) {
1601                                 cursorLeft(cur);
1602                                 // the layout things can change the height of a row !
1603                                 redoParagraph(cur);
1604                                 return;
1605                         }
1606                 }
1607
1608                 if (cur.par() != 0)
1609                         recordUndo(cur, Undo::DELETE, cur.par() - 1);
1610
1611                 par_type tmppit = cur.par();
1612                 // We used to do cursorLeftIntern() here, but it is
1613                 // not a good idea since it triggers the auto-delete
1614                 // mechanism. So we do a cursorLeftIntern()-lite,
1615                 // without the dreaded mechanism. (JMarc)
1616                 if (cur.par() != 0) {
1617                         // steps into the above paragraph.
1618                         setCursorIntern(cur, cur.par() - 1,
1619                                         pars_[cur.par() - 1].size(),
1620                                         false);
1621                 }
1622
1623                 // Pasting is not allowed, if the paragraphs have different
1624                 // layout. I think it is a real bug of all other
1625                 // word processors to allow it. It confuses the user.
1626                 // Correction: Pasting is always allowed with standard-layout
1627                 Buffer & buf = cur.buffer();
1628                 BufferParams const & bufparams = buf.params();
1629                 LyXTextClass const & tclass = bufparams.getLyXTextClass();
1630                 par_type const cpit = cur.par();
1631
1632                 if (cpit != tmppit
1633                     && (pars_[cpit].layout() == pars_[tmppit].layout()
1634                         || pars_[tmppit].layout() == tclass.defaultLayout())
1635                     && pars_[cpit].getAlign() == pars_[tmppit].getAlign()) {
1636                         mergeParagraph(bufparams, buf.paragraphs(), cpit);
1637
1638                         if (cur.pos() != 0 && pars_[cpit].isSeparator(cur.pos() - 1))
1639                                 --cur.pos();
1640
1641                         // the counters may have changed
1642                         updateCounters();
1643                         setCursor(cur, cur.par(), cur.pos(), false);
1644                 }
1645         } else {
1646                 // this is the code for a normal backspace, not pasting
1647                 // any paragraphs
1648                 recordUndo(cur, Undo::DELETE);
1649                 // We used to do cursorLeftIntern() here, but it is
1650                 // not a good idea since it triggers the auto-delete
1651                 // mechanism. So we do a cursorLeftIntern()-lite,
1652                 // without the dreaded mechanism. (JMarc)
1653                 setCursorIntern(cur, cur.par(), cur.pos() - 1,
1654                                 false, cur.boundary());
1655                 cur.paragraph().erase(cur.pos());
1656         }
1657
1658         if (cur.pos() == cur.lastpos())
1659                 setCurrentFont(cur);
1660
1661         redoParagraph(cur);
1662         setCursor(cur, cur.par(), cur.pos(), false, cur.boundary());
1663 }
1664
1665
1666 Paragraph & LyXText::getPar(par_type par) const
1667 {
1668         //lyxerr << "getPar: " << par << " from " << paragraphs().size() << endl;
1669         BOOST_ASSERT(par >= 0);
1670         BOOST_ASSERT(par < int(paragraphs().size()));
1671         return paragraphs()[par];
1672 }
1673
1674
1675 Row const & LyXText::firstRow() const
1676 {
1677         return *paragraphs().front().rows.begin();
1678 }
1679
1680
1681 void LyXText::redoParagraphInternal(par_type const pit)
1682 {
1683         // remove rows of paragraph, keep track of height changes
1684         Paragraph & par = pars_[pit];
1685         height_ -= par.height;
1686
1687         // clear old data
1688         par.rows.clear();
1689         par.height = 0;
1690         par.width = 0;
1691
1692         // redo insets
1693         InsetList::iterator ii = par.insetlist.begin();
1694         InsetList::iterator iend = par.insetlist.end();
1695         for (; ii != iend; ++ii) {
1696                 Dimension dim;
1697                 int const w = maxwidth_ - leftMargin(pit) - rightMargin(par);
1698                 MetricsInfo mi(bv(), getFont(par, ii->pos), w);
1699                 ii->inset->metrics(mi, dim);
1700         }
1701
1702         // rebreak the paragraph
1703         par.setBeginOfBody();
1704         pos_type z = 0;
1705         do {
1706                 Row row(z);
1707                 rowBreakPoint(pit, row);
1708                 setRowWidth(pit, row);
1709                 setHeightOfRow(pit, row);
1710                 row.y_offset(par.height);
1711                 par.rows.push_back(row);
1712                 par.width = std::max(par.width, row.width());
1713                 par.height += row.height();
1714                 z = row.endpos();
1715         } while (z < par.size());
1716
1717         height_ += par.height;
1718         //lyxerr << "redoParagraph: " << par.rows.size() << " rows\n";
1719 }
1720
1721
1722 void LyXText::redoParagraphs(par_type pit, par_type end)
1723 {
1724         for (; pit != end; ++pit)
1725                 redoParagraphInternal(pit);
1726         updateParPositions();
1727         updateCounters();
1728 }
1729
1730
1731 void LyXText::redoParagraph(par_type pit)
1732 {
1733         redoParagraphInternal(pit);
1734         updateParPositions();
1735 }
1736
1737
1738 void LyXText::fullRebreak()
1739 {
1740         redoParagraphs(0, paragraphs().size());
1741         bv()->cursor().resetAnchor();
1742 }
1743
1744
1745 void LyXText::metrics(MetricsInfo & mi, Dimension & dim)
1746 {
1747         //BOOST_ASSERT(mi.base.textwidth);
1748         if (mi.base.textwidth)
1749                 maxwidth_ = mi.base.textwidth;
1750         //lyxerr << "LyXText::metrics: width: " << mi.base.textwidth
1751         //<< " maxWidth: " << maxwidth << "\nfont: " << mi.base.font
1752         //<< endl;
1753
1754         // Rebuild row cache. This recomputes height as well.
1755         redoParagraphs(0, paragraphs().size());
1756
1757         width_ = maxParagraphWidth(paragraphs());
1758
1759         // final dimension
1760         dim.asc = firstRow().ascent_of_text();
1761         dim.des = height_ - dim.asc;
1762         dim.wid = width_;
1763 }
1764
1765
1766 // only used for inset right now. should also be used for main text
1767 void LyXText::draw(PainterInfo & pi, int x, int y) const
1768 {
1769         xo_ = x;
1770         yo_ = y;
1771         paintTextInset(*this, pi);
1772 }
1773
1774
1775 // only used for inset right now. should also be used for main text
1776 void LyXText::drawSelection(PainterInfo &, int, int) const
1777 {
1778         //lyxerr << "LyXText::drawSelection at " << x << " " << y << endl;
1779 }
1780
1781
1782 bool LyXText::isLastRow(par_type pit, Row const & row) const
1783 {
1784         return row.endpos() >= pars_[pit].size()
1785                 && pit + 1 == par_type(paragraphs().size());
1786 }
1787
1788
1789 bool LyXText::isFirstRow(par_type pit, Row const & row) const
1790 {
1791         return row.pos() == 0 && pit == 0;
1792 }
1793
1794
1795 void LyXText::getWord(CursorSlice & from, CursorSlice & to,
1796         word_location const loc)
1797 {
1798         Paragraph const & from_par = pars_[from.par()];
1799         switch (loc) {
1800         case lyx::WHOLE_WORD_STRICT:
1801                 if (from.pos() == 0 || from.pos() == from_par.size()
1802                     || !from_par.isWord(from.pos())
1803                     || !from_par.isWord(from.pos() - 1)) {
1804                         to = from;
1805                         return;
1806                 }
1807                 // no break here, we go to the next
1808
1809         case lyx::WHOLE_WORD:
1810                 // If we are already at the beginning of a word, do nothing
1811                 if (!from.pos() || !from_par.isWord(from.pos() - 1))
1812                         break;
1813                 // no break here, we go to the next
1814
1815         case lyx::PREVIOUS_WORD:
1816                 // always move the cursor to the beginning of previous word
1817                 while (from.pos() && from_par.isWord(from.pos() - 1))
1818                         --from.pos();
1819                 break;
1820         case lyx::NEXT_WORD:
1821                 lyxerr << "LyXText::getWord: NEXT_WORD not implemented yet"
1822                        << endl;
1823                 break;
1824         case lyx::PARTIAL_WORD:
1825                 // no need to move the 'from' cursor
1826                 break;
1827         }
1828         to = from;
1829         Paragraph & to_par = pars_[to.par()];
1830         while (to.pos() < to_par.size() && to_par.isWord(to.pos()))
1831                 ++to.pos();
1832 }
1833
1834
1835 void LyXText::write(Buffer const & buf, std::ostream & os) const
1836 {
1837         ParagraphList::const_iterator pit = paragraphs().begin();
1838         ParagraphList::const_iterator end = paragraphs().end();
1839         Paragraph::depth_type dth = 0;
1840         for (; pit != end; ++pit)
1841                 pit->write(buf, os, buf.params(), dth);
1842 }
1843
1844
1845 bool LyXText::read(Buffer const & buf, LyXLex & lex)
1846 {
1847         static Change current_change;
1848
1849         Paragraph::depth_type depth = 0;
1850
1851         while (lex.isOK()) {
1852                 lex.nextToken();
1853                 string const token = lex.getString();
1854
1855                 if (token.empty())
1856                         continue;
1857
1858                 if (token == "\\end_inset") {
1859                         break;
1860                 }
1861
1862                 if (token == "\\end_body") {
1863                         continue;
1864                 }
1865
1866                 if (token == "\\begin_body") {
1867                         continue;
1868                 }
1869
1870                 if (token == "\\end_document") {
1871                         return false;
1872                 }
1873
1874                 if (token == "\\begin_layout") {
1875                         lex.pushToken(token);
1876
1877                         Paragraph par;
1878                         par.params().depth(depth);
1879                         if (buf.params().tracking_changes)
1880                                 par.trackChanges();
1881                         par.setFont(0, LyXFont(LyXFont::ALL_INHERIT, buf.params().language));
1882                         pars_.push_back(par);
1883
1884                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1885                         // not BufferParams
1886                         ::readParagraph(buf, pars_.back(), lex);
1887
1888                 } else if (token == "\\begin_deeper") {
1889                         ++depth;
1890                 } else if (token == "\\end_deeper") {
1891                         if (!depth) {
1892                                 lex.printError("\\end_deeper: " "depth is already null");
1893                         } else {
1894                                 --depth;
1895                         }
1896                 } else {
1897                         lyxerr << "Handling unknown body token: `"
1898                                << token << '\'' << endl;
1899                 }
1900         }
1901         return true;
1902 }
1903
1904
1905 int LyXText::ascent() const
1906 {
1907         return firstRow().ascent_of_text();
1908 }
1909
1910
1911 int LyXText::descent() const
1912 {
1913         return height_ - firstRow().ascent_of_text();
1914 }
1915
1916
1917 int LyXText::cursorX(CursorSlice const & cur) const
1918 {
1919         par_type const pit = cur.par();
1920         Paragraph const & par = pars_[pit];
1921         if (par.rows.empty())
1922                 return xo_;
1923
1924         Row const & row = *par.getRow(cur.pos());
1925
1926         pos_type pos = cur.pos();
1927         pos_type cursor_vpos = 0;
1928
1929         RowMetrics const m = computeRowMetrics(pit, row);
1930         double x = m.x;
1931
1932         pos_type const row_pos  = row.pos();
1933         pos_type const end      = row.endpos();
1934
1935         if (end <= row_pos)
1936                 cursor_vpos = row_pos;
1937         else if (pos >= end)
1938                 cursor_vpos = isRTL(par) ? row_pos : end;
1939         else if (pos > row_pos && pos >= end)
1940                 // Place cursor after char at (logical) position pos - 1
1941                 cursor_vpos = (bidi.level(pos - 1) % 2 == 0)
1942                         ? bidi.log2vis(pos - 1) + 1 : bidi.log2vis(pos - 1);
1943         else
1944                 // Place cursor before char at (logical) position pos
1945                 cursor_vpos = (bidi.level(pos) % 2 == 0)
1946                         ? bidi.log2vis(pos) : bidi.log2vis(pos) + 1;
1947
1948         pos_type body_pos = par.beginOfBody();
1949         if (body_pos > 0 &&
1950             (body_pos > end || !par.isLineSeparator(body_pos - 1)))
1951                 body_pos = 0;
1952
1953         for (pos_type vpos = row_pos; vpos < cursor_vpos; ++vpos) {
1954                 pos_type pos = bidi.vis2log(vpos);
1955                 if (body_pos > 0 && pos == body_pos - 1) {
1956                         x += m.label_hfill
1957                                 + font_metrics::width(par.layout()->labelsep,
1958                                                       getLabelFont(par));
1959                         if (par.isLineSeparator(body_pos - 1))
1960                                 x -= singleWidth(par, body_pos - 1);
1961                 }
1962
1963                 if (hfillExpansion(par, row, pos)) {
1964                         x += singleWidth(par, pos);
1965                         if (pos >= body_pos)
1966                                 x += m.hfill;
1967                         else
1968                                 x += m.label_hfill;
1969                 } else if (par.isSeparator(pos)) {
1970                         x += singleWidth(par, pos);
1971                         if (pos >= body_pos)
1972                                 x += m.separator;
1973                 } else
1974                         x += singleWidth(par, pos);
1975         }
1976         return xo_ + int(x);
1977 }
1978
1979
1980 int LyXText::cursorY(CursorSlice const & cur) const
1981 {
1982         Paragraph const & par = getPar(cur.par());
1983         Row const & row = *par.getRow(cur.pos());
1984         return yo_ + par.y + row.y_offset() + row.baseline();
1985 }
1986
1987
1988 // Returns the current font and depth as a message.
1989 string LyXText::currentState(LCursor & cur)
1990 {
1991         BOOST_ASSERT(this == cur.text());
1992         Buffer & buf = cur.buffer();
1993         Paragraph const & par = cur.paragraph();
1994         std::ostringstream os;
1995
1996         bool const show_change = buf.params().tracking_changes
1997                 && cur.pos() != cur.lastpos()
1998                 && par.lookupChange(cur.pos()) != Change::UNCHANGED;
1999
2000         if (show_change) {
2001                 Change change = par.lookupChangeFull(cur.pos());
2002                 Author const & a = buf.params().authors().get(change.author);
2003                 os << _("Change: ") << a.name();
2004                 if (!a.email().empty())
2005                         os << " (" << a.email() << ")";
2006                 if (change.changetime)
2007                         os << _(" at ") << ctime(&change.changetime);
2008                 os << " : ";
2009         }
2010
2011         // I think we should only show changes from the default
2012         // font. (Asger)
2013         LyXFont font = real_current_font;
2014         font.reduce(buf.params().getLyXTextClass().defaultfont());
2015
2016         // avoid _(...) re-entrance problem
2017         string const s = font.stateText(&buf.params());
2018         os << bformat(_("Font: %1$s"), s);
2019
2020         // os << bformat(_("Font: %1$s"), font.stateText(&buf.params));
2021
2022         // The paragraph depth
2023         int depth = cur.paragraph().getDepth();
2024         if (depth > 0)
2025                 os << bformat(_(", Depth: %1$s"), tostr(depth));
2026
2027         // The paragraph spacing, but only if different from
2028         // buffer spacing.
2029         Spacing const & spacing = par.params().spacing();
2030         if (!spacing.isDefault()) {
2031                 os << _(", Spacing: ");
2032                 switch (spacing.getSpace()) {
2033                 case Spacing::Single:
2034                         os << _("Single");
2035                         break;
2036                 case Spacing::Onehalf:
2037                         os << _("OneHalf");
2038                         break;
2039                 case Spacing::Double:
2040                         os << _("Double");
2041                         break;
2042                 case Spacing::Other:
2043                         os << _("Other (") << spacing.getValue() << ')';
2044                         break;
2045                 case Spacing::Default:
2046                         // should never happen, do nothing
2047                         break;
2048                 }
2049         }
2050
2051 #ifdef DEVEL_VERSION
2052         os << _(", Inset: ") << &cur.inset();
2053         os << _(", Paragraph: ") << cur.par();
2054         os << _(", Id: ") << par.id();
2055         os << _(", Position: ") << cur.pos();
2056         Row & row = cur.textRow();
2057         os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
2058 #endif
2059         return os.str();
2060 }
2061
2062
2063 string LyXText::getPossibleLabel(LCursor & cur) const
2064 {
2065         par_type pit = cur.par();
2066
2067         LyXLayout_ptr layout = pars_[pit].layout();
2068
2069         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
2070                 LyXLayout_ptr const & layout2 = pars_[pit - 1].layout();
2071                 if (layout2->latextype != LATEX_PARAGRAPH) {
2072                         --pit;
2073                         layout = layout2;
2074                 }
2075         }
2076
2077         string text = layout->latexname().substr(0, 3);
2078         if (layout->latexname() == "theorem")
2079                 text = "thm"; // Create a correct prefix for prettyref
2080
2081         text += ':';
2082         if (layout->latextype == LATEX_PARAGRAPH || lyxrc.label_init_length < 0)
2083                 text.erase();
2084
2085         string par_text = pars_[pit].asString(cur.buffer(), false);
2086         for (int i = 0; i < lyxrc.label_init_length; ++i) {
2087                 if (par_text.empty())
2088                         break;
2089                 string head;
2090                 par_text = split(par_text, head, ' ');
2091                 // Is it legal to use spaces in labels ?
2092                 if (i > 0)
2093                         text += '-';
2094                 text += head;
2095         }
2096
2097         return text;
2098 }
2099
2100
2101 // Manhattan distance to nearest corner
2102 int LyXText::dist(int x, int y) const
2103 {
2104         int xx = 0;
2105         int yy = 0;
2106
2107         if (x < xo_)
2108                 xx = xo_ - x;
2109         else if (x > xo_ + int(width_))
2110                 xx = x - xo_ - width_;
2111
2112         if (y < yo_ - ascent())
2113                 yy = yo_ - ascent() - y;
2114         else if (y > yo_ + descent())
2115                 yy = y - yo_ - descent();
2116
2117         lyxerr << " xo_=" << xo_ << "  yo_=" << yo_
2118                << " width_=" << width_ << " ascent=" << ascent()
2119                << " descent=" << descent()
2120                << " dist=" << xx+yy <<endl;
2121         return xx + yy;
2122 }