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 "pariterator.h"
  28 #include "coordcache.h"
  29 #include "CutAndPaste.h"
  30 #include "debug.h"
  31 #include "dispatchresult.h"
  32 #include "encoding.h"
  33 #include "errorlist.h"
  34 #include "funcrequest.h"
  35 #include "factory.h"
  36 #include "FontIterator.h"
  37 #include "gettext.h"
  38 #include "language.h"
  39 #include "LColor.h"
  40 #include "lyxlength.h"
  41 #include "lyxlex.h"
  42 #include "lyxrc.h"
  43 #include "lyxrow.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/FontMetrics.h"
  54 #include "frontends/Painter.h"
  55
  56 #include "insets/insettext.h"
  57 #include "insets/insetbibitem.h"
  58 #include "insets/insethfill.h"
  59 #include "insets/insetlatexaccent.h"
  60 #include "insets/insetline.h"
  61 #include "insets/insetnewline.h"
  62 #include "insets/insetpagebreak.h"
  63 #include "insets/insetoptarg.h"
  64 #include "insets/insetspace.h"
  65 #include "insets/insetspecialchar.h"
  66 #include "insets/insettabular.h"
  67
  68 #include "support/lstrings.h"
  69 #include "support/textutils.h"
  70 #include "support/convert.h"
  71
  72 #include <boost/current_function.hpp>
  73
  74 #include <sstream>
  75
  76
  77 namespace lyx {
  78
  79 using support::bformat;
  80 using support::contains;
  81 using support::lowercase;
  82 using support::split;
  83 using support::uppercase;
  84
  85 using cap::cutSelection;
  86 using cap::pasteParagraphList;
  87
  88 using frontend::FontMetrics;
  89
  90 using std::auto_ptr;
  91 using std::advance;
  92 using std::distance;
  93 using std::max;
  94 using std::min;
  95 using std::endl;
  96 using std::string;
  97
  98
  99 namespace {
 100
 101 int numberOfSeparators(Paragraph const & par, Row const & row)
 102 {
 103         pos_type const first = max(row.pos(), par.beginOfBody());
 104         pos_type const last = row.endpos() - 1;
 105         int n = 0;
 106         for (pos_type p = first; p < last; ++p) {
 107                 if (par.isSeparator(p))
 108                         ++n;
 109         }
 110         return n;
 111 }
 112
 113
 114 int numberOfLabelHfills(Paragraph const & par, Row const & row)
 115 {
 116         pos_type last = row.endpos() - 1;
 117         pos_type first = row.pos();
 118
 119         // hfill *DO* count at the beginning of paragraphs!
 120         if (first) {
 121                 while (first < last && par.isHfill(first))
 122                         ++first;
 123         }
 124
 125         last = min(last, par.beginOfBody());
 126         int n = 0;
 127         for (pos_type p = first; p < last; ++p) {
 128                 if (par.isHfill(p))
 129                         ++n;
 130         }
 131         return n;
 132 }
 133
 134
 135 int numberOfHfills(Paragraph const & par, Row const & row)
 136 {
 137         pos_type const last = row.endpos();
 138         pos_type first = row.pos();
 139
 140         // hfill *DO* count at the beginning of paragraphs!
 141         if (first) {
 142                 while (first < last && par.isHfill(first))
 143                         ++first;
 144         }
 145
 146         first = max(first, par.beginOfBody());
 147
 148         int n = 0;
 149         for (pos_type p = first; p < last; ++p) {
 150                 if (par.isHfill(p))
 151                         ++n;
 152         }
 153         return n;
 154 }
 155
 156
 157 void readParToken(Buffer const & buf, Paragraph & par, LyXLex & lex,
 158         string const & token, LyXFont & font, Change & change, ErrorList & errorList)
 159 {
 160         BufferParams const & bp = buf.params();
 161
 162         if (token[0] != '\\') {
 163 #if 0
 164                 string::const_iterator cit = token.begin();
 165                 for (; cit != token.end(); ++cit)
 166                         par.insertChar(par.size(), (*cit), font, change);
 167 #else
 168                 docstring dstr = lex.getDocString();
 169                 docstring::const_iterator cit = dstr.begin();
 170                 docstring::const_iterator cend = dstr.end();
 171                 for (; cit != cend; ++cit)
 172                         par.insertChar(par.size(), *cit, font, change);
 173 #endif
 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(Change::UNCHANGED);
 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                         errorList.push_back(ErrorItem(_("Unknown layout"),
 191                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 192                         from_utf8(layoutname), from_utf8(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 << BOOST_CURRENT_FUNCTION
 207                        << ": Solitary \\end_layout in line "
 208                        << lex.getLineNo() << "\n"
 209                        << "Missing \\begin_layout?.\n";
 210         } else if (token == "\\end_inset") {
 211                 lyxerr << BOOST_CURRENT_FUNCTION
 212                        << ": Solitary \\end_inset in line "
 213                        << lex.getLineNo() << "\n"
 214                        << "Missing \\begin_inset?.\n";
 215         } else if (token == "\\begin_inset") {
 216                 InsetBase * inset = readInset(lex, buf);
 217                 if (inset)
 218                         par.insertInset(par.size(), inset, font, change);
 219                 else {
 220                         lex.eatLine();
 221                         docstring line = from_utf8(lex.getString());
 222                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 223                                             par.id(), 0, par.size()));
 224                 }
 225         } else if (token == "\\family") {
 226                 lex.next();
 227                 font.setLyXFamily(lex.getString());
 228         } else if (token == "\\series") {
 229                 lex.next();
 230                 font.setLyXSeries(lex.getString());
 231         } else if (token == "\\shape") {
 232                 lex.next();
 233                 font.setLyXShape(lex.getString());
 234         } else if (token == "\\size") {
 235                 lex.next();
 236                 font.setLyXSize(lex.getString());
 237         } else if (token == "\\lang") {
 238                 lex.next();
 239                 string const tok = lex.getString();
 240                 Language const * lang = languages.getLanguage(tok);
 241                 if (lang) {
 242                         font.setLanguage(lang);
 243                 } else {
 244                         font.setLanguage(bp.language);
 245                         lex.printError("Unknown language `$$Token'");
 246                 }
 247         } else if (token == "\\numeric") {
 248                 lex.next();
 249                 font.setNumber(font.setLyXMisc(lex.getString()));
 250         } else if (token == "\\emph") {
 251                 lex.next();
 252                 font.setEmph(font.setLyXMisc(lex.getString()));
 253         } else if (token == "\\bar") {
 254                 lex.next();
 255                 string const tok = lex.getString();
 256
 257                 if (tok == "under")
 258                         font.setUnderbar(LyXFont::ON);
 259                 else if (tok == "no")
 260                         font.setUnderbar(LyXFont::OFF);
 261                 else if (tok == "default")
 262                         font.setUnderbar(LyXFont::INHERIT);
 263                 else
 264                         lex.printError("Unknown bar font flag "
 265                                        "`$$Token'");
 266         } else if (token == "\\noun") {
 267                 lex.next();
 268                 font.setNoun(font.setLyXMisc(lex.getString()));
 269         } else if (token == "\\color") {
 270                 lex.next();
 271                 font.setLyXColor(lex.getString());
 272         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 273
 274                 // Insets don't make sense in a free-spacing context! ---Kayvan
 275                 if (par.isFreeSpacing()) {
 276                         if (token == "\\InsetSpace")
 277                                 par.insertChar(par.size(), ' ', font, change);
 278                         else if (lex.isOK()) {
 279                                 lex.next();
 280                                 string const next_token = lex.getString();
 281                                 if (next_token == "\\-")
 282                                         par.insertChar(par.size(), '-', font, change);
 283                                 else {
 284                                         lex.printError("Token `$$Token' "
 285                                                        "is in free space "
 286                                                        "paragraph layout!");
 287                                 }
 288                         }
 289                 } else {
 290                         auto_ptr<InsetBase> inset;
 291                         if (token == "\\SpecialChar" )
 292                                 inset.reset(new InsetSpecialChar);
 293                         else
 294                                 inset.reset(new InsetSpace);
 295                         inset->read(buf, lex);
 296                         par.insertInset(par.size(), inset.release(),
 297                                         font, change);
 298                 }
 299         } else if (token == "\\i") {
 300                 auto_ptr<InsetBase> inset(new InsetLatexAccent);
 301                 inset->read(buf, lex);
 302                 par.insertInset(par.size(), inset.release(), font, change);
 303         } else if (token == "\\backslash") {
 304                 par.insertChar(par.size(), '\\', font, change);
 305         } else if (token == "\\newline") {
 306                 auto_ptr<InsetBase> inset(new InsetNewline);
 307                 inset->read(buf, lex);
 308                 par.insertInset(par.size(), inset.release(), font, change);
 309         } else if (token == "\\LyXTable") {
 310                 auto_ptr<InsetBase> inset(new InsetTabular(buf));
 311                 inset->read(buf, lex);
 312                 par.insertInset(par.size(), inset.release(), font, change);
 313         } else if (token == "\\hfill") {
 314                 par.insertInset(par.size(), new InsetHFill, font, change);
 315         } else if (token == "\\lyxline") {
 316                 par.insertInset(par.size(), new InsetLine, font, change);
 317         } else if (token == "\\newpage") {
 318                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 319         } else if (token == "\\change_unchanged") {
 320                 change = Change(Change::UNCHANGED);
 321         } else if (token == "\\change_inserted") {
 322                 lex.eatLine();
 323                 std::istringstream is(lex.getString());
 324                 unsigned int aid;
 325                 time_type ct;
 326                 is >> aid >> ct;
 327                 if (aid >= bp.author_map.size()) {
 328                         errorList.push_back(ErrorItem(_("Change tracking error"),
 329                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 330                                             par.id(), 0, par.size()));
 331                         change = Change(Change::UNCHANGED);
 332                 } else
 333                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 334         } else if (token == "\\change_deleted") {
 335                 lex.eatLine();
 336                 std::istringstream is(lex.getString());
 337                 unsigned int aid;
 338                 time_type ct;
 339                 is >> aid >> ct;
 340                 if (aid >= bp.author_map.size()) {
 341                         errorList.push_back(ErrorItem(_("Change tracking error"),
 342                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 343                                             par.id(), 0, par.size()));
 344                         change = Change(Change::UNCHANGED);
 345                 } else
 346                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 347         } else {
 348                 lex.eatLine();
 349                 errorList.push_back(ErrorItem(_("Unknown token"),
 350                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 351                         from_utf8(lex.getString())),
 352                         par.id(), 0, par.size()));
 353         }
 354 }
 355
 356
 357 void readParagraph(Buffer const & buf, Paragraph & par, LyXLex & lex,
 358         ErrorList & errorList)
 359 {
 360         lex.nextToken();
 361         string token = lex.getString();
 362         LyXFont font;
 363         Change change(Change::UNCHANGED);
 364
 365         while (lex.isOK()) {
 366                 readParToken(buf, par, lex, token, font, change, errorList);
 367
 368                 lex.nextToken();
 369                 token = lex.getString();
 370
 371                 if (token.empty())
 372                         continue;
 373
 374                 if (token == "\\end_layout") {
 375                         //Ok, paragraph finished
 376                         break;
 377                 }
 378
 379                 lyxerr[Debug::PARSER] << "Handling paragraph token: `"
 380                                       << token << '\'' << endl;
 381                 if (token == "\\begin_layout" || token == "\\end_document"
 382                     || token == "\\end_inset" || token == "\\begin_deeper"
 383                     || token == "\\end_deeper") {
 384                         lex.pushToken(token);
 385                         lyxerr << "Paragraph ended in line "
 386                                << lex.getLineNo() << "\n"
 387                                << "Missing \\end_layout.\n";
 388                         break;
 389                 }
 390         }
 391         // Final change goes to paragraph break:
 392         par.setChange(par.size(), change);
 393
 394         // Initialize begin_of_body_ on load; redoParagraph maintains
 395         par.setBeginOfBody();
 396 }
 397
 398
 399 } // namespace anon
 400
 401
 402
 403 double LyXText::spacing(Buffer const & buffer,
 404                 Paragraph const & par) const
 405 {
 406         if (par.params().spacing().isDefault())
 407                 return buffer.params().spacing().getValue();
 408         return par.params().spacing().getValue();
 409 }
 410
 411
 412 int LyXText::width() const
 413 {
 414         return dim_.wid;
 415 }
 416
 417
 418 int LyXText::height() const
 419 {
 420         return dim_.height();
 421 }
 422
 423
 424 int LyXText::singleWidth(Buffer const & buffer, Paragraph const & par,
 425                 pos_type pos) const
 426 {
 427         return singleWidth(par, pos, par.getChar(pos),
 428                 getFont(buffer, par, pos));
 429 }
 430
 431
 432 int LyXText::singleWidth(Paragraph const & par,
 433                          pos_type pos, char_type c, LyXFont const & font) const
 434 {
 435         // The most common case is handled first (Asger)
 436         if (isPrintable(c)) {
 437                 Language const * language = font.language();
 438                 if (language->rightToLeft()) {
 439                         if ((lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 440                              lyxrc.font_norm_type == LyXRC::ISO_10646_1)
 441                             && language->lang() == "arabic") {
 442                                 if (Encodings::isComposeChar_arabic(c))
 443                                         return 0;
 444                                 c = par.transformChar(c, pos);
 445                         } else if (language->lang() == "hebrew" &&
 446                                    Encodings::isComposeChar_hebrew(c))
 447                                 return 0;
 448                 }
 449                 return theFontMetrics(font).width(c);
 450         }
 451
 452         if (c == Paragraph::META_INSET)
 453                 return par.getInset(pos)->width();
 454
 455         return theFontMetrics(font).width(c);
 456 }
 457
 458
 459 int LyXText::leftMargin(Buffer const & buffer, pit_type pit) const
 460 {
 461         BOOST_ASSERT(pit >= 0);
 462         BOOST_ASSERT(pit < int(pars_.size()));
 463         return leftMargin(buffer, pit, pars_[pit].size());
 464 }
 465
 466
 467 int LyXText::leftMargin(Buffer const & buffer,
 468                 pit_type const pit, pos_type const pos) const
 469 {
 470         BOOST_ASSERT(pit >= 0);
 471         BOOST_ASSERT(pit < int(pars_.size()));
 472         Paragraph const & par = pars_[pit];
 473         BOOST_ASSERT(pos >= 0);
 474         BOOST_ASSERT(pos <= par.size());
 475         //lyxerr << "LyXText::leftMargin: pit: " << pit << " pos: " << pos << endl;
 476         LyXTextClass const & tclass = buffer.params().getLyXTextClass();
 477         LyXLayout_ptr const & layout = par.layout();
 478
 479         string parindent = layout->parindent;
 480
 481         int l_margin = 0;
 482
 483         if (isMainText(buffer))
 484                 l_margin += changebarMargin();
 485
 486         // FIXME UNICODE
 487         docstring leftm = from_utf8(tclass.leftmargin());
 488         l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(leftm);
 489
 490         if (par.getDepth() != 0) {
 491                 // find the next level paragraph
 492                 pit_type newpar = outerHook(pit, pars_);
 493                 if (newpar != pit_type(pars_.size())) {
 494                         if (pars_[newpar].layout()->isEnvironment()) {
 495                                 l_margin = leftMargin(buffer, newpar);
 496                         }
 497                         if (par.layout() == tclass.defaultLayout()) {
 498                                 if (pars_[newpar].params().noindent())
 499                                         parindent.erase();
 500                                 else
 501                                         parindent = pars_[newpar].layout()->parindent;
 502                         }
 503                 }
 504         }
 505
 506         // This happens after sections in standard classes. The 1.3.x
 507         // code compared depths too, but it does not seem necessary
 508         // (JMarc)
 509         if (par.layout() == tclass.defaultLayout()
 510             && pit > 0 && pars_[pit - 1].layout()->nextnoindent)
 511                 parindent.erase();
 512
 513         LyXFont const labelfont = getLabelFont(buffer, par);
 514         FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
 515
 516         switch (layout->margintype) {
 517         case MARGIN_DYNAMIC:
 518                 if (!layout->leftmargin.empty()) {
 519                         // FIXME UNICODE
 520                         docstring leftm = from_utf8(layout->leftmargin);
 521                         l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(leftm);
 522                 }
 523                 if (!par.getLabelstring().empty()) {
 524                         // FIXME UNICODE
 525                         docstring labin = from_utf8(layout->labelindent);
 526                         l_margin += labelfont_metrics.signedWidth(labin);
 527                         docstring labstr = par.getLabelstring();
 528                         l_margin += labelfont_metrics.width(labstr);
 529                         docstring labsep = from_utf8(layout->labelsep);
 530                         l_margin += labelfont_metrics.width(labsep);
 531                 }
 532                 break;
 533
 534         case MARGIN_MANUAL: {
 535                 // FIXME UNICODE
 536                 docstring labin = from_utf8(layout->labelindent);
 537                 l_margin += labelfont_metrics.signedWidth(labin);
 538                 // The width of an empty par, even with manual label, should be 0
 539                 if (!par.empty() && pos >= par.beginOfBody()) {
 540                         if (!par.getLabelWidthString().empty()) {
 541                                 docstring labstr = par.getLabelWidthString();
 542                                 l_margin += labelfont_metrics.width(labstr);
 543                                 docstring labsep = from_utf8(layout->labelsep);
 544                                 l_margin += labelfont_metrics.width(labsep);
 545                         }
 546                 }
 547                 break;
 548         }
 549
 550         case MARGIN_STATIC: {
 551                 // FIXME UNICODE
 552                 docstring leftm = from_utf8(layout->leftmargin);
 553                 l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(leftm)
 554                         * 4     / (par.getDepth() + 4);
 555                 break;
 556         }
 557
 558         case MARGIN_FIRST_DYNAMIC:
 559                 if (layout->labeltype == LABEL_MANUAL) {
 560                         if (pos >= par.beginOfBody()) {
 561                                 // FIXME UNICODE
 562                                 l_margin += labelfont_metrics.signedWidth(
 563                                         from_utf8(layout->leftmargin));
 564                         } else {
 565                                 // FIXME UNICODE
 566                                 l_margin += labelfont_metrics.signedWidth(
 567                                         from_utf8(layout->labelindent));
 568                         }
 569                 } else if (pos != 0
 570                            // Special case to fix problems with
 571                            // theorems (JMarc)
 572                            || (layout->labeltype == LABEL_STATIC
 573                                && layout->latextype == LATEX_ENVIRONMENT
 574                                && !isFirstInSequence(pit, pars_))) {
 575                         // FIXME UNICODE
 576                         l_margin += labelfont_metrics.signedWidth(from_utf8(layout->leftmargin));
 577                 } else if (layout->labeltype != LABEL_TOP_ENVIRONMENT
 578                            && layout->labeltype != LABEL_BIBLIO
 579                            && layout->labeltype !=
 580                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 581                         l_margin += labelfont_metrics.signedWidth(from_utf8(layout->labelindent));
 582                         l_margin += labelfont_metrics.width(from_utf8(layout->labelsep));
 583                         l_margin += labelfont_metrics.width(par.getLabelstring());
 584                 }
 585                 break;
 586
 587         case MARGIN_RIGHT_ADDRESS_BOX: {
 588 #if 0
 589                 // ok, a terrible hack. The left margin depends on the widest
 590                 // row in this paragraph.
 591                 RowList::iterator rit = par.rows().begin();
 592                 RowList::iterator end = par.rows().end();
 593 #ifdef WITH_WARNINGS
 594 #warning This is wrong.
 595 #endif
 596                 int minfill = maxwidth_;
 597                 for ( ; rit != end; ++rit)
 598                         if (rit->fill() < minfill)
 599                                 minfill = rit->fill();
 600                 l_margin += theFontMetrics(params.getFont()).signedWidth(layout->leftmargin);
 601                 l_margin += minfill;
 602 #endif
 603                 // also wrong, but much shorter.
 604                 l_margin += maxwidth_ / 2;
 605                 break;
 606         }
 607         }
 608
 609         if (!par.params().leftIndent().zero())
 610                 l_margin += par.params().leftIndent().inPixels(maxwidth_);
 611
 612         LyXAlignment align;
 613
 614         if (par.params().align() == LYX_ALIGN_LAYOUT)
 615                 align = layout->align;
 616         else
 617                 align = par.params().align();
 618
 619         // set the correct parindent
 620         if (pos == 0
 621             && (layout->labeltype == LABEL_NO_LABEL
 622                || layout->labeltype == LABEL_TOP_ENVIRONMENT
 623                || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 624                || (layout->labeltype == LABEL_STATIC
 625                    && layout->latextype == LATEX_ENVIRONMENT
 626                    && !isFirstInSequence(pit, pars_)))
 627             && align == LYX_ALIGN_BLOCK
 628             && !par.params().noindent()
 629             // in some insets, paragraphs are never indented
 630             && !(par.inInset() && par.inInset()->neverIndent(buffer))
 631             // display style insets are always centered, omit indentation
 632             && !(!par.empty()
 633                     && par.isInset(pos)
 634                     && par.getInset(pos)->display())
 635             && (par.layout() != tclass.defaultLayout()
 636                 || buffer.params().paragraph_separation ==
 637                    BufferParams::PARSEP_INDENT))
 638         {
 639                 docstring din = from_utf8(parindent);
 640                 l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(din);
 641         }
 642
 643         return l_margin;
 644 }
 645
 646
 647 int LyXText::rightMargin(Buffer const & buffer, Paragraph const & par) const
 648 {
 649         // FIXME: the correct way is to only call rightMargin() only
 650         // within the main LyXText. The following test is thus bogus.
 651         LyXText const & text = buffer.text();
 652         // We do not want rightmargins on inner texts.
 653         if (&text != this)
 654                 return 0;
 655
 656         BufferParams const & params = buffer.params();
 657         LyXTextClass const & tclass = params.getLyXTextClass();
 658         docstring trmarg = from_utf8(tclass.rightmargin());
 659         docstring lrmarg = from_utf8(par.layout()->rightmargin);
 660         FontMetrics const & fm = theFontMetrics(params.getFont());
 661         int const r_margin =
 662                 lyx::rightMargin()
 663                 + fm.signedWidth(trmarg)
 664                 + fm.signedWidth(lrmarg)
 665                 * 4 / (par.getDepth() + 4);
 666
 667         return r_margin;
 668 }
 669
 670
 671 int LyXText::labelEnd(Buffer const & buffer, pit_type const pit) const
 672 {
 673         // labelEnd is only needed if the layout fills a flushleft label.
 674         if (pars_[pit].layout()->margintype != MARGIN_MANUAL)
 675                 return 0;
 676         // return the beginning of the body
 677         return leftMargin(buffer, pit);
 678 }
 679
 680
 681 namespace {
 682
 683 // this needs special handling - only newlines count as a break point
 684 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
 685 {
 686         pos_type const end = par.size();
 687
 688         for (; i < end; ++i)
 689                 if (par.isNewline(i))
 690                         return i + 1;
 691
 692         return end;
 693 }
 694
 695 };
 696
 697
 698 void LyXText::rowBreakPoint(Buffer const & buffer, int right_margin,
 699                 pit_type const pit,     Row & row) const
 700 {
 701         Paragraph const & par = pars_[pit];
 702         pos_type const end = par.size();
 703         pos_type const pos = row.pos();
 704         if (pos == end) {
 705                 row.endpos(end);
 706                 return;
 707         }
 708
 709         // maximum pixel width of a row
 710         int width = maxwidth_ - right_margin; // - leftMargin(buffer, pit, row);
 711         if (width < 0) {
 712                 row.endpos(end);
 713                 return;
 714         }
 715
 716         LyXLayout_ptr const & layout = par.layout();
 717
 718         if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX) {
 719                 row.endpos(addressBreakPoint(pos, par));
 720                 return;
 721         }
 722
 723         pos_type const body_pos = par.beginOfBody();
 724
 725
 726         // Now we iterate through until we reach the right margin
 727         // or the end of the par, then choose the possible break
 728         // nearest that.
 729
 730         int const left = leftMargin(buffer, pit, pos);
 731         int x = left;
 732
 733         // pixel width since last breakpoint
 734         int chunkwidth = 0;
 735
 736         FontIterator fi = FontIterator(buffer, *this, par, pos);
 737         pos_type point = end;
 738         pos_type i = pos;
 739         FontMetrics const & fm = theFontMetrics(getLabelFont(buffer, par));
 740         for ( ; i < end; ++i, ++fi) {
 741                 char_type const c = par.getChar(i);
 742                 int thiswidth = singleWidth(par, i, c, *fi);
 743
 744                 // add the auto-hfill from label end to the body
 745                 if (body_pos && i == body_pos) {
 746                         docstring lsep = from_utf8(layout->labelsep);
 747                         int add = fm.width(lsep);
 748                         if (par.isLineSeparator(i - 1))
 749                                 add -= singleWidth(buffer, par, i - 1);
 750
 751                         add = std::max(add, labelEnd(buffer, pit) - x);
 752                         thiswidth += add;
 753                 }
 754
 755                 x += thiswidth;
 756                 chunkwidth += thiswidth;
 757
 758                 // break before a character that will fall off
 759                 // the right of the row
 760                 if (x >= width) {
 761                         // if no break before, break here
 762                         if (point == end || chunkwidth >= width - left) {
 763                                 if (i > pos)
 764                                         point = i;
 765                                 else
 766                                         point = i + 1;
 767
 768                         }
 769                         // exit on last registered breakpoint:
 770                         break;
 771                 }
 772
 773                 if (par.isNewline(i)) {
 774                         point = i + 1;
 775                         break;
 776                 }
 777                 // Break before...
 778                 if (i + 1 < end) {
 779                         if (par.isInset(i + 1) && par.getInset(i + 1)->display()) {
 780                                 point = i + 1;
 781                                 break;
 782                         }
 783                         // ...and after.
 784                         if (par.isInset(i) && par.getInset(i)->display()) {
 785                                 point = i + 1;
 786                                 break;
 787                         }
 788                 }
 789
 790                 if (!par.isInset(i) || par.getInset(i)->isChar()) {
 791                         // some insets are line separators too
 792                         if (par.isLineSeparator(i)) {
 793                                 // register breakpoint:
 794                                 point = i + 1;
 795                                 chunkwidth = 0;
 796                         }
 797                 }
 798         }
 799
 800         // maybe found one, but the par is short enough.
 801         if (i == end && x < width)
 802                 point = end;
 803
 804         // manual labels cannot be broken in LaTeX. But we
 805         // want to make our on-screen rendering of footnotes
 806         // etc. still break
 807         if (body_pos && point < body_pos)
 808                 point = body_pos;
 809
 810         row.endpos(point);
 811 }
 812
 813
 814 void LyXText::setRowWidth(Buffer const & buffer, pit_type const pit, Row & row) const
 815 {
 816         // get the pure distance
 817         pos_type const end = row.endpos();
 818
 819         Paragraph const & par = pars_[pit];
 820         docstring const labelsep = from_utf8(par.layout()->labelsep);
 821         int w = leftMargin(buffer, pit, row.pos());
 822
 823         pos_type const body_pos = par.beginOfBody();
 824         pos_type i = row.pos();
 825
 826         FontMetrics const & fm = theFontMetrics(getLabelFont(buffer, par));
 827
 828         if (i < end) {
 829                 FontIterator fi = FontIterator(buffer, *this, par, i);
 830                 for ( ; i < end; ++i, ++fi) {
 831                         if (body_pos > 0 && i == body_pos) {
 832                                 w += fm.width(labelsep);
 833                                 if (par.isLineSeparator(i - 1))
 834                                         w -= singleWidth(buffer, par, i - 1);
 835                                 w = max(w, labelEnd(buffer, pit));
 836                         }
 837                         char_type const c = par.getChar(i);
 838                         w += singleWidth(par, i, c, *fi);
 839                 }
 840         }
 841
 842         if (body_pos > 0 && body_pos >= end) {
 843                 w += fm.width(labelsep);
 844                 if (end > 0 && par.isLineSeparator(end - 1))
 845                         w -= singleWidth(buffer, par, end - 1);
 846                 w = max(w, labelEnd(buffer, pit));
 847         }
 848
 849         row.width(w + rightMargin(buffer, par));
 850 }
 851
 852
 853 // returns the minimum space a manual label needs on the screen in pixel
 854 int LyXText::labelFill(Buffer const & buffer, Paragraph const & par,
 855                 Row const & row) const
 856 {
 857         pos_type last = par.beginOfBody();
 858
 859         BOOST_ASSERT(last > 0);
 860
 861         // -1 because a label ends with a space that is in the label
 862         --last;
 863
 864         // a separator at this end does not count
 865         if (par.isLineSeparator(last))
 866                 --last;
 867
 868         int w = 0;
 869         for (pos_type i = row.pos(); i <= last; ++i)
 870                 w += singleWidth(buffer, par, i);
 871
 872         docstring const & label = par.params().labelWidthString();
 873         if (label.empty())
 874                 return 0;
 875
 876         FontMetrics const & fm = theFontMetrics(getLabelFont(buffer, par));
 877
 878         return max(0, fm.width(label) - w);
 879 }
 880
 881
 882 LColor_color LyXText::backgroundColor() const
 883 {
 884         return LColor_color(LColor::color(background_color_));
 885 }
 886
 887
 888 void LyXText::setHeightOfRow(BufferView const & bv, pit_type const pit,
 889                 Row & row)
 890 {
 891         Paragraph const & par = pars_[pit];
 892         // get the maximum ascent and the maximum descent
 893         double layoutasc = 0;
 894         double layoutdesc = 0;
 895         double const dh = defaultRowHeight();
 896
 897         // ok, let us initialize the maxasc and maxdesc value.
 898         // Only the fontsize count. The other properties
 899         // are taken from the layoutfont. Nicer on the screen :)
 900         LyXLayout_ptr const & layout = par.layout();
 901
 902         // as max get the first character of this row then it can
 903         // increase but not decrease the height. Just some point to
 904         // start with so we don't have to do the assignment below too
 905         // often.
 906         Buffer const & buffer = *bv.buffer();
 907         LyXFont font = getFont(buffer, par, row.pos());
 908         LyXFont::FONT_SIZE const tmpsize = font.size();
 909         font = getLayoutFont(buffer, pit);
 910         LyXFont::FONT_SIZE const size = font.size();
 911         font.setSize(tmpsize);
 912
 913         LyXFont labelfont = getLabelFont(buffer, par);
 914
 915         FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
 916         FontMetrics const & fontmetrics = theFontMetrics(font);
 917
 918         // these are minimum values
 919         double const spacing_val = layout->spacing.getValue()
 920                 * spacing(*bv.buffer(), par);
 921         //lyxerr << "spacing_val = " << spacing_val << endl;
 922         int maxasc  = int(fontmetrics.maxAscent()  * spacing_val);
 923         int maxdesc = int(fontmetrics.maxDescent() * spacing_val);
 924
 925         // insets may be taller
 926         InsetList::const_iterator ii = par.insetlist.begin();
 927         InsetList::const_iterator iend = par.insetlist.end();
 928         for ( ; ii != iend; ++ii) {
 929                 if (ii->pos >= row.pos() && ii->pos < row.endpos()) {
 930                         maxasc  = max(maxasc,  ii->inset->ascent());
 931                         maxdesc = max(maxdesc, ii->inset->descent());
 932                 }
 933         }
 934
 935         // Check if any custom fonts are larger (Asger)
 936         // This is not completely correct, but we can live with the small,
 937         // cosmetic error for now.
 938         int labeladdon = 0;
 939         pos_type const pos_end = row.endpos();
 940
 941         LyXFont::FONT_SIZE maxsize =
 942                 par.highestFontInRange(row.pos(), pos_end, size);
 943         if (maxsize > font.size()) {
 944                 font.setSize(maxsize);
 945                 maxasc  = max(maxasc,  fontmetrics.maxAscent());
 946                 maxdesc = max(maxdesc, fontmetrics.maxDescent());
 947         }
 948
 949         // This is nicer with box insets:
 950         ++maxasc;
 951         ++maxdesc;
 952
 953         row.ascent(maxasc);
 954
 955         // is it a top line?
 956         if (row.pos() == 0) {
 957                 Buffer const & buffer = *bv.buffer();
 958                 BufferParams const & bufparams = buffer.params();
 959                 // some parksips VERY EASY IMPLEMENTATION
 960                 if (bufparams.paragraph_separation
 961                     == BufferParams::PARSEP_SKIP
 962                         && pit != 0
 963                         && ((layout->isParagraph() && par.getDepth() == 0)
 964                             || (pars_[pit - 1].layout()->isParagraph()
 965                                 && pars_[pit - 1].getDepth() == 0)))
 966                 {
 967                                 maxasc += bufparams.getDefSkip().inPixels(bv);
 968                 }
 969
 970                 if (par.params().startOfAppendix())
 971                         maxasc += int(3 * dh);
 972
 973                 // This is special code for the chapter, since the label of this
 974                 // layout is printed in an extra row
 975                 if (layout->counter == "chapter"
 976                     && !par.params().labelString().empty()) {
 977                         labeladdon = int(labelfont_metrics.maxHeight()
 978                                      * layout->spacing.getValue()
 979                                      * spacing(buffer, par));
 980                 }
 981
 982                 // special code for the top label
 983                 if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
 984                      || layout->labeltype == LABEL_BIBLIO
 985                      || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
 986                     && isFirstInSequence(pit, paragraphs())
 987                     && !par.getLabelstring().empty())
 988                 {
 989                         labeladdon = int(
 990                                   labelfont_metrics.maxHeight()
 991                                         * layout->spacing.getValue()
 992                                         * spacing(*bv.buffer(), par)
 993                                 + (layout->topsep + layout->labelbottomsep) * dh);
 994                 }
 995
 996                 // Add the layout spaces, for example before and after
 997                 // a section, or between the items of a itemize or enumerate
 998                 // environment.
 999
1000                 pit_type prev = depthHook(pit, pars_, par.getDepth());
1001                 if (prev != pit
1002                     && pars_[prev].layout() == layout
1003                     && pars_[prev].getDepth() == par.getDepth()
1004                     && pars_[prev].getLabelWidthString() == par.getLabelWidthString())
1005                 {
1006                         layoutasc = layout->itemsep * dh;
1007                 } else if (pit != 0 || row.pos() != 0) {
1008                         if (layout->topsep > 0)
1009                                 layoutasc = layout->topsep * dh;
1010                 }
1011
1012                 prev = outerHook(pit, pars_);
1013                 if (prev != pit_type(pars_.size())) {
1014                         maxasc += int(pars_[prev].layout()->parsep * dh);
1015                 } else if (pit != 0) {
1016                         if (pars_[pit - 1].getDepth() != 0 ||
1017                                         pars_[pit - 1].layout() == layout) {
1018                                 maxasc += int(layout->parsep * dh);
1019                         }
1020                 }
1021         }
1022
1023         // is it a bottom line?
1024         if (row.endpos() >= par.size()) {
1025                 // add the layout spaces, for example before and after
1026                 // a section, or between the items of a itemize or enumerate
1027                 // environment
1028                 pit_type nextpit = pit + 1;
1029                 if (nextpit != pit_type(pars_.size())) {
1030                         pit_type cpit = pit;
1031                         double usual = 0;
1032                         double unusual = 0;
1033
1034                         if (pars_[cpit].getDepth() > pars_[nextpit].getDepth()) {
1035                                 usual = pars_[cpit].layout()->bottomsep * dh;
1036                                 cpit = depthHook(cpit, paragraphs(), pars_[nextpit].getDepth());
1037                                 if (pars_[cpit].layout() != pars_[nextpit].layout()
1038                                         || pars_[nextpit].getLabelWidthString() != pars_[cpit].getLabelWidthString())
1039                                 {
1040                                         unusual = pars_[cpit].layout()->bottomsep * dh;
1041                                 }
1042                                 layoutdesc = max(unusual, usual);
1043                         } else if (pars_[cpit].getDepth() == pars_[nextpit].getDepth()) {
1044                                 if (pars_[cpit].layout() != pars_[nextpit].layout()
1045                                         || pars_[nextpit].getLabelWidthString() != pars_[cpit].getLabelWidthString())
1046                                         layoutdesc = int(pars_[cpit].layout()->bottomsep * dh);
1047                         }
1048                 }
1049         }
1050
1051         // incalculate the layout spaces
1052         maxasc  += int(layoutasc  * 2 / (2 + pars_[pit].getDepth()));
1053         maxdesc += int(layoutdesc * 2 / (2 + pars_[pit].getDepth()));
1054
1055         // FIXME: the correct way is to do the following is to move the
1056         // following code in another method specially tailored for the
1057         // main LyXText. The following test is thus bogus.
1058         LyXText const & text = buffer.text();
1059         // Top and bottom margin of the document (only at top-level)
1060         if (&text == this) {
1061                 if (pit == 0 && row.pos() == 0)
1062                         maxasc += 20;
1063                 if (pit + 1 == pit_type(pars_.size()) &&
1064                     row.endpos() == par.size())
1065                         maxdesc += 20;
1066         }
1067
1068         row.ascent(maxasc + labeladdon);
1069         row.descent(maxdesc);
1070 }
1071
1072
1073 namespace {
1074
1075 }
1076
1077 void LyXText::breakParagraph(LCursor & cur, bool keep_layout)
1078 {
1079         BOOST_ASSERT(this == cur.text());
1080
1081         Paragraph & cpar = cur.paragraph();
1082         pit_type cpit = cur.pit();
1083
1084         LyXTextClass const & tclass = cur.buffer().params().getLyXTextClass();
1085         LyXLayout_ptr const & layout = cpar.layout();
1086
1087         // this is only allowed, if the current paragraph is not empty
1088         // or caption and if it has not the keepempty flag active
1089         if (cur.lastpos() == 0 && !cpar.allowEmpty()
1090            && layout->labeltype != LABEL_SENSITIVE)
1091                 return;
1092
1093         // a layout change may affect also the following paragraph
1094         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
1095
1096         // Always break behind a space
1097         // It is better to erase the space (Dekel)
1098         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
1099                 // FIXME: change tracking (MG)
1100                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1101
1102         // How should the layout for the new paragraph be?
1103         int preserve_layout = 0;
1104         if (keep_layout)
1105                 preserve_layout = 2;
1106         else
1107                 preserve_layout = layout->isEnvironment();
1108
1109         // We need to remember this before we break the paragraph, because
1110         // that invalidates the layout variable
1111         bool sensitive = layout->labeltype == LABEL_SENSITIVE;
1112
1113         // we need to set this before we insert the paragraph.
1114         bool const isempty = cpar.allowEmpty() && cpar.empty();
1115
1116         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
1117                          cur.pos(), preserve_layout);
1118
1119         // After this, neither paragraph contains any rows!
1120
1121         cpit = cur.pit();
1122         pit_type next_par = cpit + 1;
1123
1124         // well this is the caption hack since one caption is really enough
1125         if (sensitive) {
1126                 if (cur.pos() == 0)
1127                         // set to standard-layout
1128                         pars_[cpit].applyLayout(tclass.defaultLayout());
1129                 else
1130                         // set to standard-layout
1131                         pars_[next_par].applyLayout(tclass.defaultLayout());
1132         }
1133
1134         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0))
1135                 // FIXME: change tracking (MG)
1136                 pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges);
1137
1138         ParIterator current_it(cur);
1139         ParIterator last_it(cur);
1140         ++last_it;
1141         ++last_it;
1142
1143         updateLabels(cur.buffer(), current_it, last_it);
1144
1145         // Mark "carriage return" as inserted if change tracking:
1146         if (cur.buffer().params().trackChanges) {
1147                 // FIXME: Change tracking (MG)
1148                 cur.paragraph().setChange(cur.paragraph().size(),
1149                         Change(Change::INSERTED));
1150         }
1151
1152         // This check is necessary. Otherwise the new empty paragraph will
1153         // be deleted automatically. And it is more friendly for the user!
1154         if (cur.pos() != 0 || isempty)
1155                 setCursor(cur, cur.pit() + 1, 0);
1156         else
1157                 setCursor(cur, cur.pit(), 0);
1158 }
1159
1160
1161 // insert a character, moves all the following breaks in the
1162 // same Paragraph one to the right and make a rebreak
1163 void LyXText::insertChar(LCursor & cur, char_type c)
1164 {
1165         BOOST_ASSERT(this == cur.text());
1166         BOOST_ASSERT(c != Paragraph::META_INSET);
1167
1168         recordUndo(cur, Undo::INSERT);
1169
1170         Buffer const & buffer = cur.buffer();
1171         Paragraph & par = cur.paragraph();
1172         // try to remove this
1173         pit_type const pit = cur.pit();
1174
1175         bool const freeSpacing = par.layout()->free_spacing ||
1176                 par.isFreeSpacing();
1177
1178         if (lyxrc.auto_number) {
1179                 static docstring const number_operators = from_ascii("+-/*");
1180                 static docstring const number_unary_operators = from_ascii("+-");
1181                 static docstring const number_seperators = from_ascii(".,:");
1182
1183                 if (current_font.number() == LyXFont::ON) {
1184                         if (!isDigit(c) && !contains(number_operators, c) &&
1185                             !(contains(number_seperators, c) &&
1186                               cur.pos() != 0 &&
1187                               cur.pos() != cur.lastpos() &&
1188                               getFont(buffer, par, cur.pos()).number() == LyXFont::ON &&
1189                               getFont(buffer, par, cur.pos() - 1).number() == LyXFont::ON)
1190                            )
1191                                 number(cur); // Set current_font.number to OFF
1192                 } else if (isDigit(c) &&
1193                            real_current_font.isVisibleRightToLeft()) {
1194                         number(cur); // Set current_font.number to ON
1195
1196                         if (cur.pos() != 0) {
1197                                 char_type const c = par.getChar(cur.pos() - 1);
1198                                 if (contains(number_unary_operators, c) &&
1199                                     (cur.pos() == 1
1200                                      || par.isSeparator(cur.pos() - 2)
1201                                      || par.isNewline(cur.pos() - 2))
1202                                   ) {
1203                                         setCharFont(buffer, pit, cur.pos() - 1, current_font);
1204                                 } else if (contains(number_seperators, c)
1205                                      && cur.pos() >= 2
1206                                      && getFont(buffer, par, cur.pos() - 2).number() == LyXFont::ON) {
1207                                         setCharFont(buffer, pit, cur.pos() - 1, current_font);
1208                                 }
1209                         }
1210                 }
1211         }
1212
1213         // First check, if there will be two blanks together or a blank at
1214         // the beginning of a paragraph.
1215         // I decided to handle blanks like normal characters, the main
1216         // difference are the special checks when calculating the row.fill
1217         // (blank does not count at the end of a row) and the check here
1218
1219         // When the free-spacing option is set for the current layout,
1220         // disable the double-space checking
1221         if (!freeSpacing && isLineSeparatorChar(c)) {
1222                 if (cur.pos() == 0) {
1223                         static bool sent_space_message = false;
1224                         if (!sent_space_message) {
1225                                 cur.message(_("You cannot insert a space at the "
1226                                                            "beginning of a paragraph. Please read the Tutorial."));
1227                                 sent_space_message = true;
1228                         }
1229                         return;
1230                 }
1231                 BOOST_ASSERT(cur.pos() > 0);
1232                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
1233                     && !par.isDeleted(cur.pos() - 1)) {
1234                         static bool sent_space_message = false;
1235                         if (!sent_space_message) {
1236                                 cur.message(_("You cannot type two spaces this way. "
1237                                                            "Please read the Tutorial."));
1238                                 sent_space_message = true;
1239                         }
1240                         return;
1241                 }
1242         }
1243
1244         par.insertChar(cur.pos(), c, current_font, cur.buffer().params().trackChanges);
1245         setCursor(cur, cur.pit(), cur.pos() + 1, false, cur.boundary());
1246         charInserted();
1247 }
1248
1249
1250 void LyXText::charInserted()
1251 {
1252         // Here we call finishUndo for every 20 characters inserted.
1253         // This is from my experience how emacs does it. (Lgb)
1254         static unsigned int counter;
1255         if (counter < 20) {
1256                 ++counter;
1257         } else {
1258                 finishUndo();
1259                 counter = 0;
1260         }
1261 }
1262
1263
1264 RowMetrics LyXText::computeRowMetrics(Buffer const & buffer,
1265                 pit_type const pit, Row const & row) const
1266 {
1267         RowMetrics result;
1268         Paragraph const & par = pars_[pit];
1269
1270         double w = dim_.wid - row.width();
1271
1272         bool const is_rtl = isRTL(buffer, par);
1273         if (is_rtl)
1274                 result.x = rightMargin(buffer, par);
1275         else
1276                 result.x = leftMargin(buffer, pit, row.pos());
1277
1278         // is there a manual margin with a manual label
1279         LyXLayout_ptr const & layout = par.layout();
1280
1281         if (layout->margintype == MARGIN_MANUAL
1282             && layout->labeltype == LABEL_MANUAL) {
1283                 /// We might have real hfills in the label part
1284                 int nlh = numberOfLabelHfills(par, row);
1285
1286                 // A manual label par (e.g. List) has an auto-hfill
1287                 // between the label text and the body of the
1288                 // paragraph too.
1289                 // But we don't want to do this auto hfill if the par
1290                 // is empty.
1291                 if (!par.empty())
1292                         ++nlh;
1293
1294                 if (nlh && !par.getLabelWidthString().empty())
1295                         result.label_hfill = labelFill(buffer, par, row) / double(nlh);
1296         }
1297
1298         // are there any hfills in the row?
1299         int const nh = numberOfHfills(par, row);
1300
1301         if (nh) {
1302                 if (w > 0)
1303                         result.hfill = w / nh;
1304         // we don't have to look at the alignment if it is ALIGN_LEFT and
1305         // if the row is already larger then the permitted width as then
1306         // we force the LEFT_ALIGN'edness!
1307         } else if (int(row.width()) < maxwidth_) {
1308                 // is it block, flushleft or flushright?
1309                 // set x how you need it
1310                 int align;
1311                 if (par.params().align() == LYX_ALIGN_LAYOUT)
1312                         align = layout->align;
1313                 else
1314                         align = par.params().align();
1315
1316                 // Display-style insets should always be on a centred row
1317                 // The test on par.size() is to catch zero-size pars, which
1318                 // would trigger the assert in Paragraph::getInset().
1319                 //inset = par.size() ? par.getInset(row.pos()) : 0;
1320                 if (!par.empty()
1321                     && par.isInset(row.pos())
1322                     && par.getInset(row.pos())->display())
1323                 {
1324                         align = LYX_ALIGN_CENTER;
1325                 }
1326
1327                 switch (align) {
1328                 case LYX_ALIGN_BLOCK: {
1329                         int const ns = numberOfSeparators(par, row);
1330                         bool disp_inset = false;
1331                         if (row.endpos() < par.size()) {
1332                                 InsetBase const * in = par.getInset(row.endpos());
1333                                 if (in)
1334                                         disp_inset = in->display();
1335                         }
1336                         // If we have separators, this is not the last row of a
1337                         // par, does not end in newline, and is not row above a
1338                         // display inset... then stretch it
1339                         if (ns
1340                             && row.endpos() < par.size()
1341                             && !par.isNewline(row.endpos() - 1)
1342                             && !disp_inset
1343                                 ) {
1344                                 result.separator = w / ns;
1345                         } else if (is_rtl) {
1346                                 result.x += w;
1347                         }
1348                         break;
1349                 }
1350                 case LYX_ALIGN_RIGHT:
1351                         result.x += w;
1352                         break;
1353                 case LYX_ALIGN_CENTER:
1354                         result.x += w / 2;
1355                         break;
1356                 }
1357         }
1358
1359         bidi.computeTables(par, buffer, row);
1360         if (is_rtl) {
1361                 pos_type body_pos = par.beginOfBody();
1362                 pos_type end = row.endpos();
1363
1364                 if (body_pos > 0
1365                     && (body_pos > end || !par.isLineSeparator(body_pos - 1)))
1366                 {
1367                         docstring const lsep = from_utf8(layout->labelsep);
1368                         result.x += theFontMetrics(getLabelFont(buffer, par)).width(lsep);
1369                         if (body_pos <= end)
1370                                 result.x += result.label_hfill;
1371                 }
1372         }
1373
1374         return result;
1375 }
1376
1377
1378 // the cursor set functions have a special mechanism. When they
1379 // realize, that you left an empty paragraph, they will delete it.
1380
1381 bool LyXText::cursorRightOneWord(LCursor & cur)
1382 {
1383         BOOST_ASSERT(this == cur.text());
1384
1385         LCursor old = cur;
1386
1387         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
1388                 ++old.pit();
1389                 old.pos() = 0;
1390         } else {
1391                 // Advance through word.
1392                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
1393                         ++old.pos();
1394                 // Skip through trailing nonword stuff.
1395                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
1396                         ++old.pos();
1397         }
1398         return setCursor(cur, old.pit(), old.pos());
1399 }
1400
1401
1402 bool LyXText::cursorLeftOneWord(LCursor & cur)
1403 {
1404         BOOST_ASSERT(this == cur.text());
1405
1406         LCursor old = cur;
1407
1408         if (old.pos() == 0 && old.pit() != 0) {
1409                 --old.pit();
1410                 old.pos() = old.lastpos();
1411         } else {
1412                 // Skip through initial nonword stuff.
1413                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
1414                         --old.pos();
1415                 // Advance through word.
1416                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
1417                         --old.pos();
1418         }
1419         return setCursor(cur, old.pit(), old.pos());
1420 }
1421
1422
1423 void LyXText::selectWord(LCursor & cur, word_location loc)
1424 {
1425         BOOST_ASSERT(this == cur.text());
1426         CursorSlice from = cur.top();
1427         CursorSlice to = cur.top();
1428         getWord(from, to, loc);
1429         if (cur.top() != from)
1430                 setCursor(cur, from.pit(), from.pos());
1431         if (to == from)
1432                 return;
1433         cur.resetAnchor();
1434         setCursor(cur, to.pit(), to.pos());
1435         cur.setSelection();
1436 }
1437
1438
1439 // Select the word currently under the cursor when no
1440 // selection is currently set
1441 bool LyXText::selectWordWhenUnderCursor(LCursor & cur, word_location loc)
1442 {
1443         BOOST_ASSERT(this == cur.text());
1444         if (cur.selection())
1445                 return false;
1446         selectWord(cur, loc);
1447         return cur.selection();
1448 }
1449
1450
1451 void LyXText::acceptChange(LCursor & cur)
1452 {
1453         BOOST_ASSERT(this == cur.text());
1454         if (!cur.selection() && cur.lastpos() != 0)
1455                 return;
1456
1457         recordUndoSelection(cur, Undo::INSERT);
1458
1459         DocIterator it = cur.selectionBegin();
1460         DocIterator et = cur.selectionEnd();
1461         pit_type pit = it.pit();
1462         bool isDeleted = pars_[pit].isDeleted(it.pos());
1463         for (; pit <= et.pit(); ++pit) {
1464                 pos_type left  = ( pit == it.pit() ? it.pos() : 0 );
1465                 pos_type right =
1466                     ( pit == et.pit() ? et.pos() : pars_[pit].size() + 1 );
1467                 pars_[pit].acceptChanges(left, right);
1468         }
1469         if (isDeleted) {
1470                 ParagraphList & plist = paragraphs();
1471                 if (it.pit() + 1 < et.pit())
1472                         pars_.erase(boost::next(plist.begin(), it.pit() + 1),
1473                                     boost::next(plist.begin(), et.pit()));
1474
1475                 // Paragraph merge if appropriate:
1476                 // FIXME: change tracking (MG)
1477                 if (pars_[it.pit()].isDeleted(pars_[it.pit()].size())) {
1478                         setCursorIntern(cur, it.pit() + 1, 0);
1479                         backspacePos0(cur);
1480                 }
1481         }
1482         finishUndo();
1483         cur.clearSelection();
1484         setCursorIntern(cur, it.pit(), 0);
1485 }
1486
1487
1488 void LyXText::rejectChange(LCursor & cur)
1489 {
1490         BOOST_ASSERT(this == cur.text());
1491         if (!cur.selection() && cur.lastpos() != 0)
1492                 return;
1493
1494         recordUndoSelection(cur, Undo::INSERT);
1495
1496         DocIterator it = cur.selectionBegin();
1497         DocIterator et = cur.selectionEnd();
1498         pit_type pit = it.pit();
1499         bool isInserted = pars_[pit].isInserted(it.pos());
1500         for (; pit <= et.pit(); ++pit) {
1501                 pos_type left  = ( pit == it.pit() ? it.pos() : 0 );
1502                 pos_type right =
1503                     ( pit == et.pit() ? et.pos() : pars_[pit].size() + 1 );
1504                 pars_[pit].rejectChanges(left, right);
1505         }
1506         if (isInserted) {
1507                 ParagraphList & plist = paragraphs();
1508                 if (it.pit() + 1 < et.pit())
1509                         pars_.erase(boost::next(plist.begin(), it.pit() + 1),
1510                                     boost::next(plist.begin(), et.pit()));
1511                 // Paragraph merge if appropriate:
1512                 // FIXME: change tracking (MG)
1513                 if (pars_[it.pit()].isInserted(pars_[it.pit()].size())) {
1514                         setCursorIntern(cur, it.pit() + 1, 0);
1515                         backspacePos0(cur);
1516                 }
1517         }
1518         finishUndo();
1519         cur.clearSelection();
1520         setCursorIntern(cur, it.pit(), 0);
1521 }
1522
1523
1524 // Delete from cursor up to the end of the current or next word.
1525 void LyXText::deleteWordForward(LCursor & cur)
1526 {
1527         BOOST_ASSERT(this == cur.text());
1528         if (cur.lastpos() == 0)
1529                 cursorRight(cur);
1530         else {
1531                 cur.resetAnchor();
1532                 cur.selection() = true;
1533                 cursorRightOneWord(cur);
1534                 cur.setSelection();
1535                 cutSelection(cur, true, false);
1536         }
1537 }
1538
1539
1540 // Delete from cursor to start of current or prior word.
1541 void LyXText::deleteWordBackward(LCursor & cur)
1542 {
1543         BOOST_ASSERT(this == cur.text());
1544         if (cur.lastpos() == 0)
1545                 cursorLeft(cur);
1546         else {
1547                 cur.resetAnchor();
1548                 cur.selection() = true;
1549                 cursorLeftOneWord(cur);
1550                 cur.setSelection();
1551                 cutSelection(cur, true, false);
1552         }
1553 }
1554
1555
1556 // Kill to end of line.
1557 void LyXText::deleteLineForward(LCursor & cur)
1558 {
1559         BOOST_ASSERT(this == cur.text());
1560         if (cur.lastpos() == 0) {
1561                 // Paragraph is empty, so we just go to the right
1562                 cursorRight(cur);
1563         } else {
1564                 cur.resetAnchor();
1565                 cur.selection() = true; // to avoid deletion
1566                 cursorEnd(cur);
1567                 cur.setSelection();
1568                 // What is this test for ??? (JMarc)
1569                 if (!cur.selection())
1570                         deleteWordForward(cur);
1571                 else
1572                         cutSelection(cur, true, false);
1573         }
1574 }
1575
1576
1577 void LyXText::changeCase(LCursor & cur, LyXText::TextCase action)
1578 {
1579         BOOST_ASSERT(this == cur.text());
1580         CursorSlice from;
1581         CursorSlice to;
1582
1583         if (cur.selection()) {
1584                 from = cur.selBegin();
1585                 to = cur.selEnd();
1586         } else {
1587                 from = cur.top();
1588                 getWord(from, to, PARTIAL_WORD);
1589                 cursorRightOneWord(cur);
1590         }
1591
1592         recordUndoSelection(cur);
1593
1594         pos_type pos = from.pos();
1595         int par = from.pit();
1596
1597         while (par != int(pars_.size()) && (pos != to.pos() || par != to.pit())) {
1598                 pit_type pit = par;
1599                 if (pos == pars_[pit].size()) {
1600                         ++par;
1601                         pos = 0;
1602                         continue;
1603                 }
1604                 char_type c = pars_[pit].getChar(pos);
1605                 if (c != Paragraph::META_INSET) {
1606                         switch (action) {
1607                         case text_lowercase:
1608                                 c = lowercase(c);
1609                                 break;
1610                         case text_capitalization:
1611                                 c = uppercase(c);
1612                                 action = text_lowercase;
1613                                 break;
1614                         case text_uppercase:
1615                                 c = uppercase(c);
1616                                 break;
1617                         }
1618                 }
1619
1620                 // FIXME: change tracking (MG)
1621                 // sorry but we are no longer allowed to set a single character directly
1622                 // we have to rewrite this method in terms of erase&insert operations
1623                 //pars_[pit].setChar(pos, c);
1624                 ++pos;
1625         }
1626 }
1627
1628
1629 bool LyXText::erase(LCursor & cur)
1630 {
1631         BOOST_ASSERT(this == cur.text());
1632         bool needsUpdate = false;
1633         Paragraph & par = cur.paragraph();
1634
1635         if (cur.pos() != cur.lastpos()) {
1636                 // this is the code for a normal delete, not pasting
1637                 // any paragraphs
1638                 recordUndo(cur, Undo::DELETE);
1639                 // FIXME: change tracking (MG)
1640                 par.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1641                 if (par.isDeleted(cur.pos()))
1642                         cur.forwardPos();
1643                 needsUpdate = true;
1644         } else if (cur.pit() != cur.lastpit()) {
1645                 if (cur.buffer().params().trackChanges
1646                     && par.isInserted(cur.pos())) {
1647                         // mark "carriage return" as deleted:
1648                         // FIXME: Change tracking (MG)
1649                         par.setChange(cur.pos(), Change(Change::DELETED));
1650                         cur.forwardPos();
1651                         needsUpdate = true;
1652                 } else {
1653                         setCursorIntern(cur, cur.pit() + 1, 0);
1654                         needsUpdate = backspacePos0(cur);
1655                         // FIXME: Change tracking (MG)
1656                         if (cur.paragraph().isDeleted(cur.pos()))
1657                                 cur.forwardPos();
1658                 }
1659         } else
1660                 needsUpdate = dissolveInset(cur);
1661
1662         // Make sure the cursor is correct. Is this really needed?
1663         if (needsUpdate)
1664                 setCursorIntern(cur, cur.pit(), cur.pos());
1665
1666         return needsUpdate;
1667 }
1668
1669
1670 bool LyXText::backspacePos0(LCursor & cur)
1671 {
1672         BOOST_ASSERT(this == cur.text());
1673         if (cur.pit() == 0)
1674                 return false;
1675
1676         bool needsUpdate = false;
1677
1678         BufferParams const & bufparams = cur.buffer().params();
1679         LyXTextClass const & tclass = bufparams.getLyXTextClass();
1680         ParagraphList & plist = cur.text()->paragraphs();
1681         Paragraph const & par = cur.paragraph();
1682         LCursor prevcur = cur;
1683         --prevcur.pit();
1684         prevcur.pos() = prevcur.lastpos();
1685         Paragraph const & prevpar = prevcur.paragraph();
1686
1687         // is it an empty paragraph?
1688         if (cur.lastpos() == 0
1689             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1690                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1691                 plist.erase(boost::next(plist.begin(), cur.pit()));
1692                 needsUpdate = true;
1693         }
1694         // is previous par empty?
1695         else if (prevcur.lastpos() == 0
1696                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1697                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1698                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1699                 needsUpdate = true;
1700         }
1701         // Pasting is not allowed, if the paragraphs have different
1702         // layout. I think it is a real bug of all other
1703         // word processors to allow it. It confuses the user.
1704         // Correction: Pasting is always allowed with standard-layout
1705         else if (par.layout() == prevpar.layout()
1706                  || par.layout() == tclass.defaultLayout()) {
1707                 recordUndo(cur, Undo::ATOMIC, prevcur.pit());
1708                 mergeParagraph(bufparams, plist, prevcur.pit());
1709                 needsUpdate = true;
1710         }
1711
1712         if (needsUpdate) {
1713                 updateLabels(cur.buffer());
1714                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1715         }
1716
1717         return needsUpdate;
1718 }
1719
1720
1721
1722
1723 bool LyXText::backspace(LCursor & cur)
1724 {
1725         BOOST_ASSERT(this == cur.text());
1726         bool needsUpdate = false;
1727         if (cur.pos() == 0) {
1728                 if (cur.pit() == 0)
1729                         return dissolveInset(cur);
1730
1731                 if (cur.buffer().params().trackChanges) {
1732                         // FIXME: Change tracking (MG)
1733                         // Previous paragraph, mark "carriage return" as
1734                         // deleted:
1735                         Paragraph & par = pars_[cur.pit() - 1];
1736                         // Take care of a just inserted para break:
1737                         // FIXME: change tracking (MG)
1738                         if (!par.isInserted(par.size())) {
1739                                 // FIXME: change tracking (MG)
1740                                 par.setChange(par.size(), Change(Change::DELETED));
1741                                 setCursorIntern(cur, cur.pit() - 1, par.size());
1742                                 return true;
1743                         }
1744                 }
1745
1746                 // The cursor is at the beginning of a paragraph, so
1747                 // the backspace will collapse two paragraphs into one.
1748                 needsUpdate = backspacePos0(cur);
1749
1750         } else {
1751                 // this is the code for a normal backspace, not pasting
1752                 // any paragraphs
1753                 recordUndo(cur, Undo::DELETE);
1754                 // We used to do cursorLeftIntern() here, but it is
1755                 // not a good idea since it triggers the auto-delete
1756                 // mechanism. So we do a cursorLeftIntern()-lite,
1757                 // without the dreaded mechanism. (JMarc)
1758                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1759                                 false, cur.boundary());
1760                 // FIXME: change tracking (MG)
1761                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1762         }
1763
1764         if (cur.pos() == cur.lastpos())
1765                 setCurrentFont(cur);
1766
1767         setCursor(cur, cur.pit(), cur.pos(), false, cur.boundary());
1768
1769         return needsUpdate;
1770 }
1771
1772
1773 bool LyXText::dissolveInset(LCursor & cur) {
1774         BOOST_ASSERT(this == cur.text());
1775
1776         if (isMainText(*cur.bv().buffer()) || cur.inset().nargs() != 1)
1777                 return false;
1778
1779         recordUndoInset(cur);
1780         cur.selHandle(false);
1781         // save position
1782         pos_type spos = cur.pos();
1783         pit_type spit = cur.pit();
1784         ParagraphList plist;
1785         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1786                 plist = paragraphs();
1787         cur.popLeft();
1788         // store cursor offset
1789         if (spit == 0)
1790                 spos += cur.pos();
1791         spit += cur.pit();
1792         Buffer & b = cur.buffer();
1793         // FIXME: change tracking (MG)
1794         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1795         if (!plist.empty()) {
1796                 pasteParagraphList(cur, plist, b.params().textclass,
1797                                    b.errorList("Paste"));
1798                 // restore position
1799                 cur.pit() = std::min(cur.lastpit(), spit);
1800                 cur.pos() = std::min(cur.lastpos(), spos);
1801         }
1802         cur.clearSelection();
1803         cur.resetAnchor();
1804         return true;
1805 }
1806
1807
1808 Row const & LyXText::firstRow() const
1809 {
1810         return *paragraphs().front().rows().begin();
1811 }
1812
1813
1814 bool LyXText::redoParagraph(BufferView & bv, pit_type const pit)
1815 {
1816         // remove rows of paragraph, keep track of height changes
1817         Paragraph & par = pars_[pit];
1818         Buffer const & buffer = *bv.buffer();
1819
1820         // Add bibitem insets if necessary
1821         if (par.layout()->labeltype == LABEL_BIBLIO) {
1822                 bool hasbibitem(false);
1823                 if (!par.insetlist.empty()
1824                         // Insist on it being in pos 0
1825                         && par.getChar(0) == Paragraph::META_INSET) {
1826                         InsetBase * inset = par.insetlist.begin()->inset;
1827                         if (inset->lyxCode() == InsetBase::BIBITEM_CODE)
1828                                 hasbibitem = true;
1829                 }
1830                 if (!hasbibitem) {
1831                         InsetBibitem * inset(new
1832                                 InsetBibitem(InsetCommandParams("bibitem")));
1833                         par.insertInset(0, static_cast<InsetBase *>(inset),
1834                                         Change(buffer.params().trackChanges ?
1835                                                Change::INSERTED : Change::UNCHANGED));
1836                         bv.cursor().posRight();
1837                 }
1838         }
1839
1840         // Optimisation: this is used in the next two loops
1841         // so better to calculate that once here.
1842         int right_margin = rightMargin(buffer, par);
1843
1844         // redo insets
1845         // FIXME: We should always use getFont(), see documentation of
1846         // noFontChange() in insetbase.h.
1847         LyXFont const bufferfont = buffer.params().getFont();
1848         InsetList::iterator ii = par.insetlist.begin();
1849         InsetList::iterator iend = par.insetlist.end();
1850         for (; ii != iend; ++ii) {
1851                 Dimension dim;
1852                 int const w = maxwidth_ - leftMargin(buffer, pit, ii->pos)
1853                         - right_margin;
1854                 LyXFont const & font = ii->inset->noFontChange() ?
1855                         bufferfont :
1856                         getFont(buffer, par, ii->pos);
1857                 MetricsInfo mi(&bv, font, w);
1858                 ii->inset->metrics(mi, dim);
1859         }
1860
1861         // rebreak the paragraph
1862         par.rows().clear();
1863         Dimension dim;
1864
1865         par.setBeginOfBody();
1866         pos_type z = 0;
1867         do {
1868                 Row row(z);
1869                 rowBreakPoint(buffer, right_margin, pit, row);
1870                 setRowWidth(buffer, pit, row);
1871                 setHeightOfRow(bv, pit, row);
1872                 par.rows().push_back(row);
1873                 dim.wid = std::max(dim.wid, row.width());
1874                 dim.des += row.height();
1875                 z = row.endpos();
1876         } while (z < par.size());
1877
1878         // Make sure that if a par ends in newline, there is one more row
1879         // under it
1880         // FIXME this is a dirty trick. Now the _same_ position in the
1881         // paragraph occurs in _two_ different rows, and has two different
1882         // display positions, leading to weird behaviour when moving up/down.
1883         if (z > 0 && par.isNewline(z - 1)) {
1884                 Row row(z - 1);
1885                 row.endpos(z - 1);
1886                 setRowWidth(buffer, pit, row);
1887                 setHeightOfRow(bv, pit, row);
1888                 par.rows().push_back(row);
1889                 dim.des += row.height();
1890         }
1891
1892         dim.asc += par.rows()[0].ascent();
1893         dim.des -= par.rows()[0].ascent();
1894
1895         bool const same = dim == par.dim();
1896
1897         par.dim() = dim;
1898         //lyxerr << "redoParagraph: " << par.rows().size() << " rows\n";
1899
1900         return !same;
1901 }
1902
1903
1904 void LyXText::metrics(MetricsInfo & mi, Dimension & dim)
1905 {
1906         //BOOST_ASSERT(mi.base.textwidth);
1907         if (mi.base.textwidth)
1908                 maxwidth_ = mi.base.textwidth;
1909         //lyxerr << "LyXText::metrics: width: " << mi.base.textwidth
1910         //      << " maxWidth: " << maxwidth_ << "\nfont: " << mi.base.font << endl;
1911         // save the caller's font locally:
1912         font_ = mi.base.font;
1913
1914         unsigned int h = 0;
1915         unsigned int w = 0;
1916         for (pit_type pit = 0, n = paragraphs().size(); pit != n; ++pit) {
1917                 redoParagraph(*mi.base.bv, pit);
1918                 Paragraph & par = paragraphs()[pit];
1919                 h += par.height();
1920                 if (w < par.width())
1921                         w = par.width();
1922         }
1923
1924         dim.wid = w;
1925         dim.asc = pars_[0].ascent();
1926         dim.des = h - dim.asc;
1927
1928         dim_ = dim;
1929 }
1930
1931
1932 // only used for inset right now. should also be used for main text
1933 void LyXText::draw(PainterInfo & pi, int x, int y) const
1934 {
1935         paintTextInset(*this, pi, x, y);
1936 }
1937
1938
1939 // only used for inset right now. should also be used for main text
1940 void LyXText::drawSelection(PainterInfo & pi, int x, int) const
1941 {
1942         LCursor & cur = pi.base.bv->cursor();
1943         if (!cur.selection())
1944                 return;
1945         if (!ptr_cmp(cur.text(), this))
1946                 return;
1947
1948         if (lyxerr.debugging(Debug::DEBUG)) {
1949                 lyxerr[Debug::DEBUG]
1950                         << BOOST_CURRENT_FUNCTION
1951                         << "draw selection at " << x
1952                         << endl;
1953         }
1954
1955         DocIterator beg = cur.selectionBegin();
1956         DocIterator end = cur.selectionEnd();
1957
1958         BufferView & bv = *pi.base.bv;
1959         Buffer const & buffer = *bv.buffer();
1960
1961         // the selection doesn't touch the visible screen
1962         if (bv_funcs::status(&bv, beg) == bv_funcs::CUR_BELOW
1963             || bv_funcs::status(&bv, end) == bv_funcs::CUR_ABOVE)
1964                 return;
1965
1966         Paragraph const & par1 = pars_[beg.pit()];
1967         Paragraph const & par2 = pars_[end.pit()];
1968
1969         bool const above = (bv_funcs::status(&bv, beg)
1970                             == bv_funcs::CUR_ABOVE);
1971         bool const below = (bv_funcs::status(&bv, end)
1972                             == bv_funcs::CUR_BELOW);
1973         int y1,y2,x1,x2;
1974         if (above) {
1975                 y1 = 0;
1976                 y2 = 0;
1977                 x1 = 0;
1978                 x2 = dim_.wid;
1979         } else {
1980                 Row const & row1 = par1.getRow(beg.pos(), beg.boundary());
1981                 y1 = bv_funcs::getPos(bv, beg, beg.boundary()).y_ - row1.ascent();
1982                 y2 = y1 + row1.height();
1983                 int const startx = cursorX(buffer, beg.top(), beg.boundary());
1984                 if (!isRTL(buffer, par1)) {
1985                         x1 = startx;
1986                         x2 = 0 + dim_.wid;
1987                 }
1988                 else {
1989                         x1 = 0;
1990                         x2 = startx;
1991                 }
1992         }
1993
1994         int Y1,Y2,X1,X2;
1995         if (below) {
1996                 Y1 = bv.workHeight();
1997                 Y2 = bv.workHeight();
1998                 X1 = 0;
1999                 X2 = dim_.wid;
2000         } else {
2001                 Row const & row2 = par2.getRow(end.pos(), end.boundary());
2002                 Y1 = bv_funcs::getPos(bv, end, end.boundary()).y_ - row2.ascent();
2003                 Y2 = Y1 + row2.height();
2004                 int const endx = cursorX(buffer, end.top(), end.boundary());
2005                 if (!isRTL(buffer, par2)) {
2006                         X1 = 0;
2007                         X2 = endx;
2008                 }
2009                 else {
2010                         X1 = endx;
2011                         X2 = 0 + dim_.wid;
2012                 }
2013         }
2014
2015         if (!above && !below && &par1.getRow(beg.pos(), beg.boundary())
2016             == &par2.getRow(end.pos(), end.boundary()))
2017         {
2018                 // paint only one rectangle
2019                 int const b( !isRTL(*bv.buffer(), par1) ? x + x1 : x + X1 );
2020                 int const w( !isRTL(*bv.buffer(), par1) ? X2 - x1 : x2 - X1 );
2021                 pi.pain.fillRectangle(b, y1, w, y2 - y1, LColor::selection);
2022                 return;
2023         }
2024
2025         if (lyxerr.debugging(Debug::DEBUG)) {
2026                 lyxerr[Debug::DEBUG] << " y1: " << y1 << " y2: " << y2
2027                            << "X1:" << X1 << " x2: " << X2 << " wid: " << dim_.wid
2028                         << endl;
2029         }
2030
2031         // paint upper rectangle
2032         pi.pain.fillRectangle(x + x1, y1, x2 - x1, y2 - y1,
2033                                       LColor::selection);
2034         // paint bottom rectangle
2035         pi.pain.fillRectangle(x + X1, Y1, X2 - X1, Y2 - Y1,
2036                                       LColor::selection);
2037         // paint center rectangle
2038         pi.pain.fillRectangle(x, y2, dim_.wid,
2039                               Y1 - y2, LColor::selection);
2040 }
2041
2042 bool LyXText::isLastRow(pit_type pit, Row const & row) const
2043 {
2044         return row.endpos() >= pars_[pit].size()
2045                 && pit + 1 == pit_type(paragraphs().size());
2046 }
2047
2048
2049 bool LyXText::isFirstRow(pit_type pit, Row const & row) const
2050 {
2051         return row.pos() == 0 && pit == 0;
2052 }
2053
2054
2055 void LyXText::getWord(CursorSlice & from, CursorSlice & to,
2056         word_location const loc)
2057 {
2058         Paragraph const & from_par = pars_[from.pit()];
2059         switch (loc) {
2060         case WHOLE_WORD_STRICT:
2061                 if (from.pos() == 0 || from.pos() == from_par.size()
2062                     || !from_par.isLetter(from.pos())
2063                     || !from_par.isLetter(from.pos() - 1)) {
2064                         to = from;
2065                         return;
2066                 }
2067                 // no break here, we go to the next
2068
2069         case WHOLE_WORD:
2070                 // If we are already at the beginning of a word, do nothing
2071                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
2072                         break;
2073                 // no break here, we go to the next
2074
2075         case PREVIOUS_WORD:
2076                 // always move the cursor to the beginning of previous word
2077                 while (from.pos() && from_par.isLetter(from.pos() - 1))
2078                         --from.pos();
2079                 break;
2080         case NEXT_WORD:
2081                 lyxerr << "LyXText::getWord: NEXT_WORD not implemented yet"
2082                        << endl;
2083                 break;
2084         case PARTIAL_WORD:
2085                 // no need to move the 'from' cursor
2086                 break;
2087         }
2088         to = from;
2089         Paragraph & to_par = pars_[to.pit()];
2090         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
2091                 ++to.pos();
2092 }
2093
2094
2095 void LyXText::write(Buffer const & buf, std::ostream & os) const
2096 {
2097         ParagraphList::const_iterator pit = paragraphs().begin();
2098         ParagraphList::const_iterator end = paragraphs().end();
2099         depth_type dth = 0;
2100         for (; pit != end; ++pit)
2101                 pit->write(buf, os, buf.params(), dth);
2102 }
2103
2104
2105 bool LyXText::read(Buffer const & buf, LyXLex & lex, ErrorList & errorList)
2106 {
2107         depth_type depth = 0;
2108
2109         while (lex.isOK()) {
2110                 lex.nextToken();
2111                 string const token = lex.getString();
2112
2113                 if (token.empty())
2114                         continue;
2115
2116                 if (token == "\\end_inset")
2117                         break;
2118
2119                 if (token == "\\end_body")
2120                         continue;
2121
2122                 if (token == "\\begin_body")
2123                         continue;
2124
2125                 if (token == "\\end_document")
2126                         return false;
2127
2128                 if (token == "\\begin_layout") {
2129                         lex.pushToken(token);
2130
2131                         Paragraph par;
2132                         par.params().depth(depth);
2133                         par.setFont(0, LyXFont(LyXFont::ALL_INHERIT, buf.params().language));
2134                         pars_.push_back(par);
2135
2136                         // FIXME: goddamn InsetTabular makes us pass a Buffer
2137                         // not BufferParams
2138                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
2139
2140                 } else if (token == "\\begin_deeper") {
2141                         ++depth;
2142                 } else if (token == "\\end_deeper") {
2143                         if (!depth) {
2144                                 lex.printError("\\end_deeper: " "depth is already null");
2145                         } else {
2146                                 --depth;
2147                         }
2148                 } else {
2149                         lyxerr << "Handling unknown body token: `"
2150                                << token << '\'' << endl;
2151                 }
2152         }
2153         return true;
2154 }
2155
2156
2157 int LyXText::ascent() const
2158 {
2159         return dim_.asc;
2160 }
2161
2162
2163 int LyXText::descent() const
2164 {
2165         return dim_.des;
2166 }
2167
2168
2169 int LyXText::cursorX(Buffer const & buffer, CursorSlice const & sl,
2170                 bool boundary) const
2171 {
2172         pit_type const pit = sl.pit();
2173         Paragraph const & par = pars_[pit];
2174         if (par.rows().empty())
2175                 return 0;
2176
2177         pos_type ppos = sl.pos();
2178         // Correct position in front of big insets
2179         bool const boundary_correction = ppos != 0 && boundary;
2180         if (boundary_correction)
2181                 --ppos;
2182
2183         Row const & row = par.getRow(sl.pos(), boundary);
2184
2185         pos_type cursor_vpos = 0;
2186
2187         RowMetrics const m = computeRowMetrics(buffer, pit, row);
2188         double x = m.x;
2189
2190         pos_type const row_pos  = row.pos();
2191         pos_type const end      = row.endpos();
2192
2193         if (end <= row_pos)
2194                 cursor_vpos = row_pos;
2195         else if (ppos >= end)
2196                 cursor_vpos = isRTL(buffer, par) ? row_pos : end;
2197         else if (ppos > row_pos && ppos >= end)
2198                 // Place cursor after char at (logical) position pos - 1
2199                 cursor_vpos = (bidi.level(ppos - 1) % 2 == 0)
2200                         ? bidi.log2vis(ppos - 1) + 1 : bidi.log2vis(ppos - 1);
2201         else
2202                 // Place cursor before char at (logical) position ppos
2203                 cursor_vpos = (bidi.level(ppos) % 2 == 0)
2204                         ? bidi.log2vis(ppos) : bidi.log2vis(ppos) + 1;
2205
2206         pos_type body_pos = par.beginOfBody();
2207         if (body_pos > 0 &&
2208             (body_pos > end || !par.isLineSeparator(body_pos - 1)))
2209                 body_pos = 0;
2210
2211         // Use font span to speed things up, see below
2212         FontSpan font_span;
2213         LyXFont font;
2214         FontMetrics const & labelfm = theFontMetrics(
2215                 getLabelFont(buffer, par));
2216
2217         for (pos_type vpos = row_pos; vpos < cursor_vpos; ++vpos) {
2218                 pos_type pos = bidi.vis2log(vpos);
2219                 if (body_pos > 0 && pos == body_pos - 1) {
2220                         // FIXME UNICODE
2221                         docstring const lsep = from_utf8(par.layout()->labelsep);
2222                         x += m.label_hfill + labelfm.width(lsep);
2223                         if (par.isLineSeparator(body_pos - 1))
2224                                 x -= singleWidth(buffer, par, body_pos - 1);
2225                 }
2226
2227                 // Use font span to speed things up, see above
2228                 if (pos < font_span.first || pos > font_span.last) {
2229                         font_span = par.fontSpan(pos);
2230                         font = getFont(buffer, par, pos);
2231                 }
2232
2233                 x += singleWidth(par, pos, par.getChar(pos), font);
2234
2235                 if (par.hfillExpansion(row, pos))
2236                         x += (pos >= body_pos) ? m.hfill : m.label_hfill;
2237                 else if (par.isSeparator(pos) && pos >= body_pos)
2238                         x += m.separator;
2239         }
2240
2241         // see correction above
2242         if (boundary_correction)
2243                 if (getFont(buffer, par, ppos).isVisibleRightToLeft())
2244                         x -= singleWidth(buffer, par, ppos);
2245                 else
2246                         x += singleWidth(buffer, par, ppos);
2247
2248         // Make sure inside an inset we always count from the left
2249         // edge (bidi!) -- MV
2250         if (sl.pos() < par.size()) {
2251                 font = getFont(buffer, par, sl.pos());
2252                 if (!boundary && font.isVisibleRightToLeft()
2253                   && par.isInset(sl.pos()))
2254                         x -= par.getInset(sl.pos())->width();
2255         }
2256         return int(x);
2257 }
2258
2259
2260 int LyXText::cursorY(CursorSlice const & sl, bool boundary) const
2261 {
2262         //lyxerr << "LyXText::cursorY: boundary: " << boundary << std::endl;
2263         Paragraph const & par = getPar(sl.pit());
2264         if (par.rows().empty())
2265                 return 0;
2266
2267         int h = 0;
2268         h -= pars_[0].rows()[0].ascent();
2269         for (pit_type pit = 0; pit < sl.pit(); ++pit)
2270                 h += pars_[pit].height();
2271         int pos = sl.pos();
2272         if (pos && boundary)
2273                 --pos;
2274         size_t const rend = par.pos2row(pos);
2275         for (size_t rit = 0; rit != rend; ++rit)
2276                 h += par.rows()[rit].height();
2277         h += par.rows()[rend].ascent();
2278         return h;
2279 }
2280
2281
2282 // Returns the current font and depth as a message.
2283 string LyXText::currentState(LCursor & cur)
2284 {
2285         BOOST_ASSERT(this == cur.text());
2286         Buffer & buf = cur.buffer();
2287         Paragraph const & par = cur.paragraph();
2288         std::ostringstream os;
2289
2290         if (buf.params().trackChanges)
2291                 os << "[C] ";
2292
2293         Change change = par.lookupChange(cur.pos());
2294
2295         if (change.type != Change::UNCHANGED) {
2296                 Author const & a = buf.params().authors().get(change.author);
2297                 os << to_utf8(_("Change: ")) << a.name();
2298                 if (!a.email().empty())
2299                         os << " (" << a.email() << ")";
2300                 os << to_utf8(_(" at ")) << ctime(&change.changetime);
2301                 os << " : ";
2302         }
2303
2304         // I think we should only show changes from the default
2305         // font. (Asger)
2306         // No, from the document font (MV)
2307         LyXFont font = real_current_font;
2308         font.reduce(buf.params().getFont());
2309
2310         // avoid to_utf8(_(...)) re-entrance problem
2311         string const s = font.stateText(&buf.params());
2312         os << to_utf8(bformat(_("Font: %1$s"), from_utf8(s)));
2313
2314         // os << to_utf8(bformat(_("Font: %1$s"), font.stateText(&buf.params)));
2315
2316         // The paragraph depth
2317         int depth = cur.paragraph().getDepth();
2318         if (depth > 0)
2319                 os << to_utf8(bformat(_(", Depth: %1$d"), depth));
2320
2321         // The paragraph spacing, but only if different from
2322         // buffer spacing.
2323         Spacing const & spacing = par.params().spacing();
2324         if (!spacing.isDefault()) {
2325                 os << to_utf8(_(", Spacing: "));
2326                 switch (spacing.getSpace()) {
2327                 case Spacing::Single:
2328                         os << to_utf8(_("Single"));
2329                         break;
2330                 case Spacing::Onehalf:
2331                         os << to_utf8(_("OneHalf"));
2332                         break;
2333                 case Spacing::Double:
2334                         os << to_utf8(_("Double"));
2335                         break;
2336                 case Spacing::Other:
2337                         os << to_utf8(_("Other (")) << spacing.getValueAsString() << ')';
2338                         break;
2339                 case Spacing::Default:
2340                         // should never happen, do nothing
2341                         break;
2342                 }
2343         }
2344
2345 #ifdef DEVEL_VERSION
2346         os << to_utf8(_(", Inset: ")) << &cur.inset();
2347         os << to_utf8(_(", Paragraph: ")) << cur.pit();
2348         os << to_utf8(_(", Id: ")) << par.id();
2349         os << to_utf8(_(", Position: ")) << cur.pos();
2350         os << to_utf8(_(", Boundary: ")) << cur.boundary();
2351 //      Row & row = cur.textRow();
2352 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
2353 #endif
2354         return os.str();
2355 }
2356
2357
2358 docstring LyXText::getPossibleLabel(LCursor & cur) const
2359 {
2360         pit_type pit = cur.pit();
2361
2362         LyXLayout_ptr layout = pars_[pit].layout();
2363
2364         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
2365                 LyXLayout_ptr const & layout2 = pars_[pit - 1].layout();
2366                 if (layout2->latextype != LATEX_PARAGRAPH) {
2367                         --pit;
2368                         layout = layout2;
2369                 }
2370         }
2371
2372         docstring name = from_ascii(layout->latexname());
2373
2374         // for captions, we want the abbreviation of the float type
2375         if (layout->labeltype == LABEL_SENSITIVE) {
2376                 // Search for the first float or wrap inset in the iterator
2377                 for (int i = cur.depth(); --i >= 0; ) {
2378                         InsetBase * const in = &cur[i].inset();
2379                         if (in->lyxCode() == InsetBase::FLOAT_CODE
2380                             || in->lyxCode() == InsetBase::WRAP_CODE) {
2381                                 name = in->getInsetName();
2382                                 break;
2383                         }
2384                 }
2385         }
2386
2387         docstring text = name.substr(0, 3);
2388         if (name == "theorem")
2389                 text = from_ascii("thm"); // Create a correct prefix for prettyref
2390
2391         text += ':';
2392         if (layout->latextype == LATEX_PARAGRAPH || lyxrc.label_init_length < 0)
2393                 text.erase();
2394
2395         docstring par_text = pars_[pit].asString(cur.buffer(), false);
2396         for (int i = 0; i < lyxrc.label_init_length; ++i) {
2397                 if (par_text.empty())
2398                         break;
2399                 docstring head;
2400                 par_text = split(par_text, head, ' ');
2401                 // Is it legal to use spaces in labels ?
2402                 if (i > 0)
2403                         text += '-';
2404                 text += head;
2405         }
2406
2407         return text;
2408 }
2409
2410
2411 //pos_type LyXText::x2pos(pit_type pit, int row, int x) const
2412 //{
2413 //      int lastx = 0;
2414 //      int currx = 0;
2415 //      Paragraph const & par = pars_[pit];
2416 //      Row const & r = par.rows()[row];
2417 //      int pos = r.pos();
2418 //      for (; currx < x && pos < r.endpos(); ++pos) {
2419 //              lastx = currx;
2420 //              currx += singleWidth(buffer, par, pos);
2421 //      }
2422 //      if (abs(lastx - x) < abs(currx - x) && pos != r.pos())
2423 //              --pos;
2424 //      return pos;
2425 //}
2426
2427
2428 pos_type LyXText::x2pos(BufferView const & bv, pit_type pit, int row,
2429                 int x) const
2430 {
2431         BOOST_ASSERT(row < int(pars_[pit].rows().size()));
2432         bool bound = false;
2433         Row const & r = pars_[pit].rows()[row];
2434         return r.pos() + getColumnNearX(bv, pit, r, x, bound);
2435 }
2436
2437
2438 //int LyXText::pos2x(pit_type pit, pos_type pos) const
2439 //{
2440 //      Paragraph const & par = pars_[pit];
2441 //      Row const & r = par.rows()[row];
2442 //      int x = 0;
2443 //      pos -= r.pos();
2444 //}
2445
2446
2447 // x,y are screen coordinates
2448 // sets cursor only within this LyXText
2449 bool LyXText::setCursorFromCoordinates(LCursor & cur, int const x, int const y)
2450 {
2451         BOOST_ASSERT(this == cur.text());
2452         pit_type pit = getPitNearY(cur.bv(), y);
2453         int yy = cur.bv().coordCache().get(this, pit).y_ - pars_[pit].ascent();
2454         lyxerr[Debug::DEBUG]
2455                 << BOOST_CURRENT_FUNCTION
2456                 << ": x: " << x
2457                 << " y: " << y
2458                 << " pit: " << pit
2459                 << " yy: " << yy << endl;
2460
2461         Paragraph const & par = pars_[pit];
2462         int r = 0;
2463         BOOST_ASSERT(par.rows().size());
2464         for (; r < int(par.rows().size()) - 1; ++r) {
2465                 Row const & row = par.rows()[r];
2466                 if (int(yy + row.height()) > y)
2467                         break;
2468                 yy += row.height();
2469         }
2470
2471         Row const & row = par.rows()[r];
2472
2473         lyxerr[Debug::DEBUG]
2474                 << BOOST_CURRENT_FUNCTION
2475                 << ": row " << r
2476                 << " from pos: " << row.pos()
2477                 << endl;
2478
2479         bool bound = false;
2480         int xx = x;
2481         pos_type const pos = row.pos() + getColumnNearX(cur.bv(), pit, row,
2482                 xx, bound);
2483
2484         lyxerr[Debug::DEBUG]
2485                 << BOOST_CURRENT_FUNCTION
2486                 << ": setting cursor pit: " << pit
2487                 << " pos: " << pos
2488                 << endl;
2489
2490         return setCursor(cur, pit, pos, true, bound);
2491 }
2492
2493
2494 } // namespace lyx