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 "bufferview_funcs.h"
  27 #include "cursor.h"
  28 #include "pariterator.h"
  29 #include "coordcache.h"
  30 #include "CutAndPaste.h"
  31 #include "debug.h"
  32 #include "dispatchresult.h"
  33 #include "encoding.h"
  34 #include "errorlist.h"
  35 #include "funcrequest.h"
  36 #include "factory.h"
  37 #include "FontIterator.h"
  38 #include "gettext.h"
  39 #include "language.h"
  40 #include "LColor.h"
  41 #include "lyxlength.h"
  42 #include "lyxlex.h"
  43 #include "lyxrc.h"
  44 #include "lyxrow.h"
  45 #include "metricsinfo.h"
  46 #include "paragraph.h"
  47 #include "paragraph_funcs.h"
  48 #include "ParagraphParameters.h"
  49 #include "rowpainter.h"
  50 #include "undo.h"
  51 #include "vspace.h"
  52 #include "WordLangTuple.h"
  53
  54 #include "frontends/FontMetrics.h"
  55 #include "frontends/Painter.h"
  56
  57 #include "insets/insettext.h"
  58 #include "insets/insetbibitem.h"
  59 #include "insets/insethfill.h"
  60 #include "insets/insetlatexaccent.h"
  61 #include "insets/insetline.h"
  62 #include "insets/insetnewline.h"
  63 #include "insets/insetpagebreak.h"
  64 #include "insets/insetoptarg.h"
  65 #include "insets/insetspace.h"
  66 #include "insets/insetspecialchar.h"
  67 #include "insets/insettabular.h"
  68
  69 #include "support/lstrings.h"
  70 #include "support/textutils.h"
  71 #include "support/convert.h"
  72
  73 #include <boost/current_function.hpp>
  74
  75 #include <sstream>
  76
  77 using std::auto_ptr;
  78 using std::advance;
  79 using std::distance;
  80 using std::max;
  81 using std::min;
  82 using std::endl;
  83 using std::string;
  84
  85 namespace lyx {
  86
  87 using support::bformat;
  88 using support::contains;
  89 using support::lowercase;
  90 using support::split;
  91 using support::uppercase;
  92
  93 using cap::cutSelection;
  94 using cap::pasteParagraphList;
  95
  96 using frontend::FontMetrics;
  97
  98 namespace {
  99
 100 void readParToken(Buffer const & buf, Paragraph & par, LyXLex & lex,
 101         string const & token, LyXFont & font, Change & change, ErrorList & errorList)
 102 {
 103         BufferParams const & bp = buf.params();
 104
 105         if (token[0] != '\\') {
 106 #if 0
 107                 string::const_iterator cit = token.begin();
 108                 for (; cit != token.end(); ++cit)
 109                         par.insertChar(par.size(), (*cit), font, change);
 110 #else
 111                 docstring dstr = lex.getDocString();
 112                 docstring::const_iterator cit = dstr.begin();
 113                 docstring::const_iterator cend = dstr.end();
 114                 for (; cit != cend; ++cit)
 115                         par.insertChar(par.size(), *cit, font, change);
 116 #endif
 117         } else if (token == "\\begin_layout") {
 118                 lex.eatLine();
 119                 string layoutname = lex.getString();
 120
 121                 font = LyXFont(LyXFont::ALL_INHERIT, bp.language);
 122                 change = Change(Change::UNCHANGED);
 123
 124                 LyXTextClass const & tclass = bp.getLyXTextClass();
 125
 126                 if (layoutname.empty()) {
 127                         layoutname = tclass.defaultLayoutName();
 128                 }
 129
 130                 bool hasLayout = tclass.hasLayout(layoutname);
 131
 132                 if (!hasLayout) {
 133                         errorList.push_back(ErrorItem(_("Unknown layout"),
 134                         bformat(_("Layout '%1$s' does not exist in textclass '%2$s'\nTrying to use the default instead.\n"),
 135                         from_utf8(layoutname), from_utf8(tclass.name())), par.id(), 0, par.size()));
 136                         layoutname = tclass.defaultLayoutName();
 137                 }
 138
 139                 par.layout(bp.getLyXTextClass()[layoutname]);
 140
 141                 // Test whether the layout is obsolete.
 142                 LyXLayout_ptr const & layout = par.layout();
 143                 if (!layout->obsoleted_by().empty())
 144                         par.layout(bp.getLyXTextClass()[layout->obsoleted_by()]);
 145
 146                 par.params().read(lex);
 147
 148         } else if (token == "\\end_layout") {
 149                 lyxerr << BOOST_CURRENT_FUNCTION
 150                        << ": Solitary \\end_layout in line "
 151                        << lex.getLineNo() << "\n"
 152                        << "Missing \\begin_layout?.\n";
 153         } else if (token == "\\end_inset") {
 154                 lyxerr << BOOST_CURRENT_FUNCTION
 155                        << ": Solitary \\end_inset in line "
 156                        << lex.getLineNo() << "\n"
 157                        << "Missing \\begin_inset?.\n";
 158         } else if (token == "\\begin_inset") {
 159                 InsetBase * inset = readInset(lex, buf);
 160                 if (inset)
 161                         par.insertInset(par.size(), inset, font, change);
 162                 else {
 163                         lex.eatLine();
 164                         docstring line = lex.getDocString();
 165                         errorList.push_back(ErrorItem(_("Unknown Inset"), line,
 166                                             par.id(), 0, par.size()));
 167                 }
 168         } else if (token == "\\family") {
 169                 lex.next();
 170                 font.setLyXFamily(lex.getString());
 171         } else if (token == "\\series") {
 172                 lex.next();
 173                 font.setLyXSeries(lex.getString());
 174         } else if (token == "\\shape") {
 175                 lex.next();
 176                 font.setLyXShape(lex.getString());
 177         } else if (token == "\\size") {
 178                 lex.next();
 179                 font.setLyXSize(lex.getString());
 180         } else if (token == "\\lang") {
 181                 lex.next();
 182                 string const tok = lex.getString();
 183                 Language const * lang = languages.getLanguage(tok);
 184                 if (lang) {
 185                         font.setLanguage(lang);
 186                 } else {
 187                         font.setLanguage(bp.language);
 188                         lex.printError("Unknown language `$$Token'");
 189                 }
 190         } else if (token == "\\numeric") {
 191                 lex.next();
 192                 font.setNumber(font.setLyXMisc(lex.getString()));
 193         } else if (token == "\\emph") {
 194                 lex.next();
 195                 font.setEmph(font.setLyXMisc(lex.getString()));
 196         } else if (token == "\\bar") {
 197                 lex.next();
 198                 string const tok = lex.getString();
 199
 200                 if (tok == "under")
 201                         font.setUnderbar(LyXFont::ON);
 202                 else if (tok == "no")
 203                         font.setUnderbar(LyXFont::OFF);
 204                 else if (tok == "default")
 205                         font.setUnderbar(LyXFont::INHERIT);
 206                 else
 207                         lex.printError("Unknown bar font flag "
 208                                        "`$$Token'");
 209         } else if (token == "\\noun") {
 210                 lex.next();
 211                 font.setNoun(font.setLyXMisc(lex.getString()));
 212         } else if (token == "\\color") {
 213                 lex.next();
 214                 font.setLyXColor(lex.getString());
 215         } else if (token == "\\InsetSpace" || token == "\\SpecialChar") {
 216
 217                 // Insets don't make sense in a free-spacing context! ---Kayvan
 218                 if (par.isFreeSpacing()) {
 219                         if (token == "\\InsetSpace")
 220                                 par.insertChar(par.size(), ' ', font, change);
 221                         else if (lex.isOK()) {
 222                                 lex.next();
 223                                 string const next_token = lex.getString();
 224                                 if (next_token == "\\-")
 225                                         par.insertChar(par.size(), '-', font, change);
 226                                 else {
 227                                         lex.printError("Token `$$Token' "
 228                                                        "is in free space "
 229                                                        "paragraph layout!");
 230                                 }
 231                         }
 232                 } else {
 233                         auto_ptr<InsetBase> inset;
 234                         if (token == "\\SpecialChar" )
 235                                 inset.reset(new InsetSpecialChar);
 236                         else
 237                                 inset.reset(new InsetSpace);
 238                         inset->read(buf, lex);
 239                         par.insertInset(par.size(), inset.release(),
 240                                         font, change);
 241                 }
 242         } else if (token == "\\i") {
 243                 auto_ptr<InsetBase> inset(new InsetLatexAccent);
 244                 inset->read(buf, lex);
 245                 par.insertInset(par.size(), inset.release(), font, change);
 246         } else if (token == "\\backslash") {
 247                 par.insertChar(par.size(), '\\', font, change);
 248         } else if (token == "\\newline") {
 249                 auto_ptr<InsetBase> inset(new InsetNewline);
 250                 inset->read(buf, lex);
 251                 par.insertInset(par.size(), inset.release(), font, change);
 252         } else if (token == "\\LyXTable") {
 253                 auto_ptr<InsetBase> inset(new InsetTabular(buf));
 254                 inset->read(buf, lex);
 255                 par.insertInset(par.size(), inset.release(), font, change);
 256         } else if (token == "\\hfill") {
 257                 par.insertInset(par.size(), new InsetHFill, font, change);
 258         } else if (token == "\\lyxline") {
 259                 par.insertInset(par.size(), new InsetLine, font, change);
 260         } else if (token == "\\newpage") {
 261                 par.insertInset(par.size(), new InsetPagebreak, font, change);
 262         } else if (token == "\\clearpage") {
 263                 par.insertInset(par.size(), new InsetClearPage, font, change);
 264         } else if (token == "\\cleardoublepage") {
 265                 par.insertInset(par.size(), new InsetClearDoublePage, font, change);
 266         } else if (token == "\\change_unchanged") {
 267                 change = Change(Change::UNCHANGED);
 268         } else if (token == "\\change_inserted") {
 269                 lex.eatLine();
 270                 std::istringstream is(lex.getString());
 271                 unsigned int aid;
 272                 time_type ct;
 273                 is >> aid >> ct;
 274                 if (aid >= bp.author_map.size()) {
 275                         errorList.push_back(ErrorItem(_("Change tracking error"),
 276                                             bformat(_("Unknown author index for insertion: %1$d\n"), aid),
 277                                             par.id(), 0, par.size()));
 278                         change = Change(Change::UNCHANGED);
 279                 } else
 280                         change = Change(Change::INSERTED, bp.author_map[aid], ct);
 281         } else if (token == "\\change_deleted") {
 282                 lex.eatLine();
 283                 std::istringstream is(lex.getString());
 284                 unsigned int aid;
 285                 time_type ct;
 286                 is >> aid >> ct;
 287                 if (aid >= bp.author_map.size()) {
 288                         errorList.push_back(ErrorItem(_("Change tracking error"),
 289                                             bformat(_("Unknown author index for deletion: %1$d\n"), aid),
 290                                             par.id(), 0, par.size()));
 291                         change = Change(Change::UNCHANGED);
 292                 } else
 293                         change = Change(Change::DELETED, bp.author_map[aid], ct);
 294         } else {
 295                 lex.eatLine();
 296                 errorList.push_back(ErrorItem(_("Unknown token"),
 297                         bformat(_("Unknown token: %1$s %2$s\n"), from_utf8(token),
 298                         lex.getDocString()),
 299                         par.id(), 0, par.size()));
 300         }
 301 }
 302
 303
 304 void readParagraph(Buffer const & buf, Paragraph & par, LyXLex & lex,
 305         ErrorList & errorList)
 306 {
 307         lex.nextToken();
 308         string token = lex.getString();
 309         LyXFont font;
 310         Change change(Change::UNCHANGED);
 311
 312         while (lex.isOK()) {
 313                 readParToken(buf, par, lex, token, font, change, errorList);
 314
 315                 lex.nextToken();
 316                 token = lex.getString();
 317
 318                 if (token.empty())
 319                         continue;
 320
 321                 if (token == "\\end_layout") {
 322                         //Ok, paragraph finished
 323                         break;
 324                 }
 325
 326                 lyxerr[Debug::PARSER] << "Handling paragraph token: `"
 327                                       << token << '\'' << endl;
 328                 if (token == "\\begin_layout" || token == "\\end_document"
 329                     || token == "\\end_inset" || token == "\\begin_deeper"
 330                     || token == "\\end_deeper") {
 331                         lex.pushToken(token);
 332                         lyxerr << "Paragraph ended in line "
 333                                << lex.getLineNo() << "\n"
 334                                << "Missing \\end_layout.\n";
 335                         break;
 336                 }
 337         }
 338         // Final change goes to paragraph break:
 339         par.setChange(par.size(), change);
 340
 341         // Initialize begin_of_body_ on load; redoParagraph maintains
 342         par.setBeginOfBody();
 343 }
 344
 345
 346 } // namespace anon
 347
 348
 349
 350 double LyXText::spacing(Buffer const & buffer,
 351                 Paragraph const & par) const
 352 {
 353         if (par.params().spacing().isDefault())
 354                 return buffer.params().spacing().getValue();
 355         return par.params().spacing().getValue();
 356 }
 357
 358
 359 int LyXText::singleWidth(Buffer const & buffer, Paragraph const & par,
 360                 pos_type pos) const
 361 {
 362         return singleWidth(par, pos, par.getChar(pos),
 363                 getFont(buffer, par, pos));
 364 }
 365
 366
 367 int LyXText::singleWidth(Paragraph const & par,
 368                          pos_type pos, char_type c, LyXFont const & font) const
 369 {
 370         // The most common case is handled first (Asger)
 371         if (isPrintable(c)) {
 372                 Language const * language = font.language();
 373                 if (language->rightToLeft()) {
 374                         if ((lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 375                              lyxrc.font_norm_type == LyXRC::ISO_10646_1)
 376                             && language->lang() == "arabic") {
 377                                 if (Encodings::isComposeChar_arabic(c))
 378                                         return 0;
 379                                 c = par.transformChar(c, pos);
 380                         } else if (language->lang() == "hebrew" &&
 381                                    Encodings::isComposeChar_hebrew(c))
 382                                 return 0;
 383                 }
 384                 return theFontMetrics(font).width(c);
 385         }
 386
 387         if (c == Paragraph::META_INSET)
 388                 return par.getInset(pos)->width();
 389
 390         return theFontMetrics(font).width(c);
 391 }
 392
 393
 394 int LyXText::leftMargin(Buffer const & buffer, int max_width, pit_type pit) const
 395 {
 396         BOOST_ASSERT(pit >= 0);
 397         BOOST_ASSERT(pit < int(pars_.size()));
 398         return leftMargin(buffer, max_width, pit, pars_[pit].size());
 399 }
 400
 401
 402 int LyXText::leftMargin(Buffer const & buffer, int max_width,
 403                 pit_type const pit, pos_type const pos) const
 404 {
 405         BOOST_ASSERT(pit >= 0);
 406         BOOST_ASSERT(pit < int(pars_.size()));
 407         Paragraph const & par = pars_[pit];
 408         BOOST_ASSERT(pos >= 0);
 409         BOOST_ASSERT(pos <= par.size());
 410         //lyxerr << "LyXText::leftMargin: pit: " << pit << " pos: " << pos << endl;
 411         LyXTextClass const & tclass = buffer.params().getLyXTextClass();
 412         LyXLayout_ptr const & layout = par.layout();
 413
 414         string parindent = layout->parindent;
 415
 416         int l_margin = 0;
 417
 418         if (isMainText(buffer))
 419                 l_margin += changebarMargin();
 420
 421         // FIXME UNICODE
 422         docstring leftm = from_utf8(tclass.leftmargin());
 423         l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(leftm);
 424
 425         if (par.getDepth() != 0) {
 426                 // find the next level paragraph
 427                 pit_type newpar = outerHook(pit, pars_);
 428                 if (newpar != pit_type(pars_.size())) {
 429                         if (pars_[newpar].layout()->isEnvironment()) {
 430                                 l_margin = leftMargin(buffer, max_width, newpar);
 431                         }
 432                         if (par.layout() == tclass.defaultLayout()) {
 433                                 if (pars_[newpar].params().noindent())
 434                                         parindent.erase();
 435                                 else
 436                                         parindent = pars_[newpar].layout()->parindent;
 437                         }
 438                 }
 439         }
 440
 441         // This happens after sections in standard classes. The 1.3.x
 442         // code compared depths too, but it does not seem necessary
 443         // (JMarc)
 444         if (par.layout() == tclass.defaultLayout()
 445             && pit > 0 && pars_[pit - 1].layout()->nextnoindent)
 446                 parindent.erase();
 447
 448         LyXFont const labelfont = getLabelFont(buffer, par);
 449         FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
 450
 451         switch (layout->margintype) {
 452         case MARGIN_DYNAMIC:
 453                 if (!layout->leftmargin.empty()) {
 454                         // FIXME UNICODE
 455                         docstring leftm = from_utf8(layout->leftmargin);
 456                         l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(leftm);
 457                 }
 458                 if (!par.getLabelstring().empty()) {
 459                         // FIXME UNICODE
 460                         docstring labin = from_utf8(layout->labelindent);
 461                         l_margin += labelfont_metrics.signedWidth(labin);
 462                         docstring labstr = par.getLabelstring();
 463                         l_margin += labelfont_metrics.width(labstr);
 464                         docstring labsep = from_utf8(layout->labelsep);
 465                         l_margin += labelfont_metrics.width(labsep);
 466                 }
 467                 break;
 468
 469         case MARGIN_MANUAL: {
 470                 // FIXME UNICODE
 471                 docstring labin = from_utf8(layout->labelindent);
 472                 l_margin += labelfont_metrics.signedWidth(labin);
 473                 // The width of an empty par, even with manual label, should be 0
 474                 if (!par.empty() && pos >= par.beginOfBody()) {
 475                         if (!par.getLabelWidthString().empty()) {
 476                                 docstring labstr = par.getLabelWidthString();
 477                                 l_margin += labelfont_metrics.width(labstr);
 478                                 docstring labsep = from_utf8(layout->labelsep);
 479                                 l_margin += labelfont_metrics.width(labsep);
 480                         }
 481                 }
 482                 break;
 483         }
 484
 485         case MARGIN_STATIC: {
 486                 // FIXME UNICODE
 487                 docstring leftm = from_utf8(layout->leftmargin);
 488                 l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(leftm)
 489                         * 4     / (par.getDepth() + 4);
 490                 break;
 491         }
 492
 493         case MARGIN_FIRST_DYNAMIC:
 494                 if (layout->labeltype == LABEL_MANUAL) {
 495                         if (pos >= par.beginOfBody()) {
 496                                 // FIXME UNICODE
 497                                 l_margin += labelfont_metrics.signedWidth(
 498                                         from_utf8(layout->leftmargin));
 499                         } else {
 500                                 // FIXME UNICODE
 501                                 l_margin += labelfont_metrics.signedWidth(
 502                                         from_utf8(layout->labelindent));
 503                         }
 504                 } else if (pos != 0
 505                            // Special case to fix problems with
 506                            // theorems (JMarc)
 507                            || (layout->labeltype == LABEL_STATIC
 508                                && layout->latextype == LATEX_ENVIRONMENT
 509                                && !isFirstInSequence(pit, pars_))) {
 510                         // FIXME UNICODE
 511                         l_margin += labelfont_metrics.signedWidth(from_utf8(layout->leftmargin));
 512                 } else if (layout->labeltype != LABEL_TOP_ENVIRONMENT
 513                            && layout->labeltype != LABEL_BIBLIO
 514                            && layout->labeltype !=
 515                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 516                         l_margin += labelfont_metrics.signedWidth(from_utf8(layout->labelindent));
 517                         l_margin += labelfont_metrics.width(from_utf8(layout->labelsep));
 518                         l_margin += labelfont_metrics.width(par.getLabelstring());
 519                 }
 520                 break;
 521
 522         case MARGIN_RIGHT_ADDRESS_BOX: {
 523 #if 0
 524                 // ok, a terrible hack. The left margin depends on the widest
 525                 // row in this paragraph.
 526                 RowList::iterator rit = par.rows().begin();
 527                 RowList::iterator end = par.rows().end();
 528 #ifdef WITH_WARNINGS
 529 #warning This is wrong.
 530 #endif
 531                 int minfill = max_width;
 532                 for ( ; rit != end; ++rit)
 533                         if (rit->fill() < minfill)
 534                                 minfill = rit->fill();
 535                 l_margin += theFontMetrics(params.getFont()).signedWidth(layout->leftmargin);
 536                 l_margin += minfill;
 537 #endif
 538                 // also wrong, but much shorter.
 539                 l_margin += max_width / 2;
 540                 break;
 541         }
 542         }
 543
 544         if (!par.params().leftIndent().zero())
 545                 l_margin += par.params().leftIndent().inPixels(max_width);
 546
 547         LyXAlignment align;
 548
 549         if (par.params().align() == LYX_ALIGN_LAYOUT)
 550                 align = layout->align;
 551         else
 552                 align = par.params().align();
 553
 554         // set the correct parindent
 555         if (pos == 0
 556             && (layout->labeltype == LABEL_NO_LABEL
 557                || layout->labeltype == LABEL_TOP_ENVIRONMENT
 558                || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 559                || (layout->labeltype == LABEL_STATIC
 560                    && layout->latextype == LATEX_ENVIRONMENT
 561                    && !isFirstInSequence(pit, pars_)))
 562             && align == LYX_ALIGN_BLOCK
 563             && !par.params().noindent()
 564             // in some insets, paragraphs are never indented
 565             && !(par.inInset() && par.inInset()->neverIndent(buffer))
 566             // display style insets are always centered, omit indentation
 567             && !(!par.empty()
 568                     && par.isInset(pos)
 569                     && par.getInset(pos)->display())
 570             && (par.layout() != tclass.defaultLayout()
 571                 || buffer.params().paragraph_separation ==
 572                    BufferParams::PARSEP_INDENT))
 573         {
 574                 docstring din = from_utf8(parindent);
 575                 l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(din);
 576         }
 577
 578         return l_margin;
 579 }
 580
 581
 582 LColor_color LyXText::backgroundColor() const
 583 {
 584         return LColor_color(LColor::color(background_color_));
 585 }
 586
 587
 588 void LyXText::breakParagraph(LCursor & cur, bool keep_layout)
 589 {
 590         BOOST_ASSERT(this == cur.text());
 591
 592         Paragraph & cpar = cur.paragraph();
 593         pit_type cpit = cur.pit();
 594
 595         LyXTextClass const & tclass = cur.buffer().params().getLyXTextClass();
 596         LyXLayout_ptr const & layout = cpar.layout();
 597
 598         // this is only allowed, if the current paragraph is not empty
 599         // or caption and if it has not the keepempty flag active
 600         if (cur.lastpos() == 0 && !cpar.allowEmpty() &&
 601             layout->labeltype != LABEL_SENSITIVE)
 602                 return;
 603
 604         // a layout change may affect also the following paragraph
 605         recUndo(cur, cur.pit(), undoSpan(cur.pit()) - 1);
 606
 607         // Always break behind a space
 608         // It is better to erase the space (Dekel)
 609         if (cur.pos() != cur.lastpos() && cpar.isLineSeparator(cur.pos()))
 610                 cpar.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
 611
 612         // What should the layout for the new paragraph be?
 613         int preserve_layout = 0;
 614         if (keep_layout)
 615                 preserve_layout = 2;
 616         else
 617                 preserve_layout = layout->isEnvironment();
 618
 619         // We need to remember this before we break the paragraph, because
 620         // that invalidates the layout variable
 621         bool sensitive = layout->labeltype == LABEL_SENSITIVE;
 622
 623         // we need to set this before we insert the paragraph.
 624         bool const isempty = cpar.allowEmpty() && cpar.empty();
 625
 626         lyx::breakParagraph(cur.buffer().params(), paragraphs(), cpit,
 627                          cur.pos(), preserve_layout);
 628
 629         // After this, neither paragraph contains any rows!
 630
 631         cpit = cur.pit();
 632         pit_type next_par = cpit + 1;
 633
 634         // well this is the caption hack since one caption is really enough
 635         if (sensitive) {
 636                 if (cur.pos() == 0)
 637                         // set to standard-layout
 638                         pars_[cpit].applyLayout(tclass.defaultLayout());
 639                 else
 640                         // set to standard-layout
 641                         pars_[next_par].applyLayout(tclass.defaultLayout());
 642         }
 643
 644         while (!pars_[next_par].empty() && pars_[next_par].isNewline(0)) {
 645                 if (!pars_[next_par].eraseChar(0, cur.buffer().params().trackChanges))
 646                         break; // the character couldn't be deleted physically due to change tracking
 647         }
 648
 649         ParIterator current_it(cur);
 650         ParIterator last_it(cur);
 651         ++last_it;
 652         ++last_it;
 653
 654         updateLabels(cur.buffer(), current_it, last_it);
 655
 656         // A singlePar update is not enough in this case.
 657         cur.updateFlags(Update::Force);
 658
 659         // This check is necessary. Otherwise the new empty paragraph will
 660         // be deleted automatically. And it is more friendly for the user!
 661         if (cur.pos() != 0 || isempty)
 662                 setCursor(cur.top(), cur.pit() + 1, 0);
 663         else
 664                 setCursor(cur.top(), cur.pit(), 0);
 665 }
 666
 667
 668 // insert a character, moves all the following breaks in the
 669 // same Paragraph one to the right and make a rebreak
 670 void LyXText::insertChar(LCursor & cur, char_type c)
 671 {
 672         BOOST_ASSERT(this == cur.text());
 673         BOOST_ASSERT(c != Paragraph::META_INSET);
 674
 675         recordUndo(cur, Undo::INSERT);
 676
 677         Buffer const & buffer = cur.buffer();
 678         Paragraph & par = cur.paragraph();
 679         // try to remove this
 680         pit_type const pit = cur.pit();
 681
 682         bool const freeSpacing = par.layout()->free_spacing ||
 683                 par.isFreeSpacing();
 684
 685         if (lyxrc.auto_number) {
 686                 static docstring const number_operators = from_ascii("+-/*");
 687                 static docstring const number_unary_operators = from_ascii("+-");
 688                 static docstring const number_seperators = from_ascii(".,:");
 689
 690                 if (current_font.number() == LyXFont::ON) {
 691                         if (!isDigit(c) && !contains(number_operators, c) &&
 692                             !(contains(number_seperators, c) &&
 693                               cur.pos() != 0 &&
 694                               cur.pos() != cur.lastpos() &&
 695                               getFont(buffer, par, cur.pos()).number() == LyXFont::ON &&
 696                               getFont(buffer, par, cur.pos() - 1).number() == LyXFont::ON)
 697                            )
 698                                 number(cur); // Set current_font.number to OFF
 699                 } else if (isDigit(c) &&
 700                            real_current_font.isVisibleRightToLeft()) {
 701                         number(cur); // Set current_font.number to ON
 702
 703                         if (cur.pos() != 0) {
 704                                 char_type const c = par.getChar(cur.pos() - 1);
 705                                 if (contains(number_unary_operators, c) &&
 706                                     (cur.pos() == 1
 707                                      || par.isSeparator(cur.pos() - 2)
 708                                      || par.isNewline(cur.pos() - 2))
 709                                   ) {
 710                                         setCharFont(buffer, pit, cur.pos() - 1, current_font);
 711                                 } else if (contains(number_seperators, c)
 712                                      && cur.pos() >= 2
 713                                      && getFont(buffer, par, cur.pos() - 2).number() == LyXFont::ON) {
 714                                         setCharFont(buffer, pit, cur.pos() - 1, current_font);
 715                                 }
 716                         }
 717                 }
 718         }
 719
 720         // First check, if there will be two blanks together or a blank at
 721         // the beginning of a paragraph.
 722         // I decided to handle blanks like normal characters, the main
 723         // difference are the special checks when calculating the row.fill
 724         // (blank does not count at the end of a row) and the check here
 725
 726         // When the free-spacing option is set for the current layout,
 727         // disable the double-space checking
 728         if (!freeSpacing && isLineSeparatorChar(c)) {
 729                 if (cur.pos() == 0) {
 730                         static bool sent_space_message = false;
 731                         if (!sent_space_message) {
 732                                 cur.message(_("You cannot insert a space at the "
 733                                                            "beginning of a paragraph. Please read the Tutorial."));
 734                                 sent_space_message = true;
 735                         }
 736                         return;
 737                 }
 738                 BOOST_ASSERT(cur.pos() > 0);
 739                 if ((par.isLineSeparator(cur.pos() - 1) || par.isNewline(cur.pos() - 1))
 740                     && !par.isDeleted(cur.pos() - 1)) {
 741                         static bool sent_space_message = false;
 742                         if (!sent_space_message) {
 743                                 cur.message(_("You cannot type two spaces this way. "
 744                                                            "Please read the Tutorial."));
 745                                 sent_space_message = true;
 746                         }
 747                         return;
 748                 }
 749         }
 750
 751         par.insertChar(cur.pos(), c, current_font, cur.buffer().params().trackChanges);
 752
 753 //              cur.updateFlags(Update::Force);
 754         setCursor(cur.top(), cur.pit(), cur.pos() + 1);
 755         charInserted();
 756 }
 757
 758
 759 void LyXText::charInserted()
 760 {
 761         // Here we call finishUndo for every 20 characters inserted.
 762         // This is from my experience how emacs does it. (Lgb)
 763         static unsigned int counter;
 764         if (counter < 20) {
 765                 ++counter;
 766         } else {
 767                 finishUndo();
 768                 counter = 0;
 769         }
 770 }
 771
 772
 773 // the cursor set functions have a special mechanism. When they
 774 // realize, that you left an empty paragraph, they will delete it.
 775
 776 bool LyXText::cursorRightOneWord(LCursor & cur)
 777 {
 778         BOOST_ASSERT(this == cur.text());
 779
 780         LCursor old = cur;
 781
 782         if (old.pos() == old.lastpos() && old.pit() != old.lastpit()) {
 783                 ++old.pit();
 784                 old.pos() = 0;
 785         } else {
 786                 // Advance through word.
 787                 while (old.pos() != old.lastpos() && old.paragraph().isLetter(old.pos()))
 788                         ++old.pos();
 789                 // Skip through trailing nonword stuff.
 790                 while (old.pos() != old.lastpos() && !old.paragraph().isLetter(old.pos()))
 791                         ++old.pos();
 792         }
 793         return setCursor(cur, old.pit(), old.pos());
 794 }
 795
 796
 797 bool LyXText::cursorLeftOneWord(LCursor & cur)
 798 {
 799         BOOST_ASSERT(this == cur.text());
 800
 801         LCursor old = cur;
 802
 803         if (old.pos() == 0 && old.pit() != 0) {
 804                 --old.pit();
 805                 old.pos() = old.lastpos();
 806         } else {
 807                 // Skip through initial nonword stuff.
 808                 while (old.pos() != 0 && !old.paragraph().isLetter(old.pos() - 1))
 809                         --old.pos();
 810                 // Advance through word.
 811                 while (old.pos() != 0 && old.paragraph().isLetter(old.pos() - 1))
 812                         --old.pos();
 813         }
 814         return setCursor(cur, old.pit(), old.pos());
 815 }
 816
 817
 818 void LyXText::selectWord(LCursor & cur, word_location loc)
 819 {
 820         BOOST_ASSERT(this == cur.text());
 821         CursorSlice from = cur.top();
 822         CursorSlice to = cur.top();
 823         getWord(from, to, loc);
 824         if (cur.top() != from)
 825                 setCursor(cur, from.pit(), from.pos());
 826         if (to == from)
 827                 return;
 828         cur.resetAnchor();
 829         setCursor(cur, to.pit(), to.pos());
 830         cur.setSelection();
 831 }
 832
 833
 834 // Select the word currently under the cursor when no
 835 // selection is currently set
 836 bool LyXText::selectWordWhenUnderCursor(LCursor & cur, word_location loc)
 837 {
 838         BOOST_ASSERT(this == cur.text());
 839         if (cur.selection())
 840                 return false;
 841         selectWord(cur, loc);
 842         return cur.selection();
 843 }
 844
 845
 846 void LyXText::acceptChange(LCursor & cur)
 847 {
 848         // FIXME: change tracking (MG)
 849
 850         BOOST_ASSERT(this == cur.text());
 851
 852         if (!cur.selection() && cur.lastpos() != 0)
 853                 return;
 854
 855         // FIXME: we must handle start = end = 0
 856
 857         recordUndoSelection(cur, Undo::INSERT);
 858
 859         DocIterator it = cur.selectionBegin();
 860         DocIterator et = cur.selectionEnd();
 861         pit_type pit = it.pit();
 862         for (; pit <= et.pit(); ++pit) {
 863                 pos_type left  = (pit == it.pit() ? it.pos() : 0);
 864                 pos_type right = (pit == et.pit() ? et.pos() : pars_[pit].size());
 865
 866                 // handle imaginary end-of-par character first
 867                 if (right == pars_[pit].size() && !pars_[pit].isUnchanged(right)) {
 868                         if (pars_[pit].isInserted(right)) {
 869                                 pars_[pit].setChange(right, Change(Change::UNCHANGED));
 870                         } else {
 871                                 // if (pit + 1 < et.pit()) {
 872                                 //      setCursorIntern(cur, pit + 1, 0);
 873                                 //      backspacePos0(cur);
 874                                 // }
 875                         }
 876                 }
 877
 878                 pars_[pit].acceptChanges(left, right);
 879         }
 880         finishUndo();
 881         cur.clearSelection();
 882         setCursorIntern(cur, it.pit(), it.pos());
 883         cur.updateFlags(Update::Force);
 884 }
 885
 886
 887 void LyXText::rejectChange(LCursor & cur)
 888 {
 889         // FIXME: change tracking (MG)
 890
 891         BOOST_ASSERT(this == cur.text());
 892
 893         if (!cur.selection() && cur.lastpos() != 0)
 894                 return;
 895
 896         // FIXME: we must handle start = end = 0
 897
 898         recordUndoSelection(cur, Undo::INSERT);
 899
 900         DocIterator it = cur.selectionBegin();
 901         DocIterator et = cur.selectionEnd();
 902         pit_type pit = it.pit();
 903         for (; pit <= et.pit(); ++pit) {
 904                 pos_type left  = (pit == it.pit() ? it.pos() : 0);
 905                 pos_type right = (pit == et.pit() ? et.pos() : pars_[pit].size());
 906
 907                 // handle imaginary end-of-par character first
 908                 if (right == pars_[pit].size() && !pars_[pit].isUnchanged(right)) {
 909                         if (pars_[pit].isDeleted(right)) {
 910                                 pars_[pit].setChange(right, Change(Change::UNCHANGED));
 911                         } else {
 912                                 // if (pit + 1 < et.pit()) {
 913                                 //      setCursorIntern(cur, pit + 1, 0);
 914                                 //      backspacePos0(cur);
 915                                 // }
 916                         }
 917                 }
 918
 919                 pars_[pit].rejectChanges(left, right);
 920         }
 921         finishUndo();
 922         cur.clearSelection();
 923         setCursorIntern(cur, it.pit(), it.pos());
 924         cur.updateFlags(Update::Force);
 925 }
 926
 927
 928 // Delete from cursor up to the end of the current or next word.
 929 void LyXText::deleteWordForward(LCursor & cur)
 930 {
 931         BOOST_ASSERT(this == cur.text());
 932         if (cur.lastpos() == 0)
 933                 cursorRight(cur);
 934         else {
 935                 cur.resetAnchor();
 936                 cur.selection() = true;
 937                 cursorRightOneWord(cur);
 938                 cur.setSelection();
 939                 cutSelection(cur, true, false);
 940         }
 941 }
 942
 943
 944 // Delete from cursor to start of current or prior word.
 945 void LyXText::deleteWordBackward(LCursor & cur)
 946 {
 947         BOOST_ASSERT(this == cur.text());
 948         if (cur.lastpos() == 0)
 949                 cursorLeft(cur);
 950         else {
 951                 cur.resetAnchor();
 952                 cur.selection() = true;
 953                 cursorLeftOneWord(cur);
 954                 cur.setSelection();
 955                 cutSelection(cur, true, false);
 956         }
 957 }
 958
 959
 960 // Kill to end of line.
 961 void LyXText::deleteLineForward(LCursor & cur)
 962 {
 963         BOOST_ASSERT(this == cur.text());
 964         if (cur.lastpos() == 0) {
 965                 // Paragraph is empty, so we just go to the right
 966                 cursorRight(cur);
 967         } else {
 968                 cur.resetAnchor();
 969                 cur.selection() = true; // to avoid deletion
 970                 cursorEnd(cur);
 971                 cur.setSelection();
 972                 // What is this test for ??? (JMarc)
 973                 if (!cur.selection())
 974                         deleteWordForward(cur);
 975                 else
 976                         cutSelection(cur, true, false);
 977         }
 978 }
 979
 980
 981 void LyXText::changeCase(LCursor & cur, LyXText::TextCase action)
 982 {
 983         BOOST_ASSERT(this == cur.text());
 984         CursorSlice from;
 985         CursorSlice to;
 986
 987         if (cur.selection()) {
 988                 from = cur.selBegin();
 989                 to = cur.selEnd();
 990         } else {
 991                 from = cur.top();
 992                 getWord(from, to, PARTIAL_WORD);
 993                 cursorRightOneWord(cur);
 994         }
 995
 996         recordUndoSelection(cur);
 997
 998         pos_type pos = from.pos();
 999         int par = from.pit();
1000
1001         while (par != int(pars_.size()) && (pos != to.pos() || par != to.pit())) {
1002                 pit_type pit = par;
1003                 if (pos == pars_[pit].size()) {
1004                         ++par;
1005                         pos = 0;
1006                         continue;
1007                 }
1008                 char_type c = pars_[pit].getChar(pos);
1009                 if (c != Paragraph::META_INSET) {
1010                         switch (action) {
1011                         case text_lowercase:
1012                                 c = lowercase(c);
1013                                 break;
1014                         case text_capitalization:
1015                                 c = uppercase(c);
1016                                 action = text_lowercase;
1017                                 break;
1018                         case text_uppercase:
1019                                 c = uppercase(c);
1020                                 break;
1021                         }
1022                 }
1023
1024                 // FIXME: change tracking (MG)
1025                 // sorry but we are no longer allowed to set a single character directly
1026                 // we have to rewrite this method in terms of erase&insert operations
1027                 //pars_[pit].setChar(pos, c);
1028                 ++pos;
1029         }
1030 }
1031
1032
1033 bool LyXText::erase(LCursor & cur)
1034 {
1035         BOOST_ASSERT(this == cur.text());
1036         bool needsUpdate = false;
1037         Paragraph & par = cur.paragraph();
1038
1039         if (cur.pos() != cur.lastpos()) {
1040                 // this is the code for a normal delete, not pasting
1041                 // any paragraphs
1042                 recordUndo(cur, Undo::DELETE);
1043                 par.eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1044                 if (par.isDeleted(cur.pos()))
1045                         cur.forwardPosNoDescend();
1046                 needsUpdate = true;
1047         } else {
1048                 if (cur.pit() == cur.lastpit())
1049                         return dissolveInset(cur);
1050
1051                 if (!par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1052                         par.setChange(cur.pos(), Change(Change::DELETED));
1053                         cur.forwardPos();
1054                         needsUpdate = true;
1055                 } else {
1056                         setCursorIntern(cur, cur.pit() + 1, 0);
1057                         needsUpdate = backspacePos0(cur);
1058                 }
1059         }
1060
1061         if (needsUpdate) {
1062                 // Make sure the cursor is correct. Is this really needed?
1063                 // No, not really... at least not here!
1064                 cur.text()->setCursor(cur.top(), cur.pit(), cur.pos());
1065         }
1066
1067         return needsUpdate;
1068 }
1069
1070
1071 bool LyXText::backspacePos0(LCursor & cur)
1072 {
1073         BOOST_ASSERT(this == cur.text());
1074         if (cur.pit() == 0)
1075                 return false;
1076
1077         bool needsUpdate = false;
1078
1079         BufferParams const & bufparams = cur.buffer().params();
1080         LyXTextClass const & tclass = bufparams.getLyXTextClass();
1081         ParagraphList & plist = cur.text()->paragraphs();
1082         Paragraph const & par = cur.paragraph();
1083         LCursor prevcur = cur;
1084         --prevcur.pit();
1085         prevcur.pos() = prevcur.lastpos();
1086         Paragraph const & prevpar = prevcur.paragraph();
1087
1088         // is it an empty paragraph?
1089         if (cur.lastpos() == 0
1090             || (cur.lastpos() == 1 && par.isSeparator(0))) {
1091                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1092                 plist.erase(boost::next(plist.begin(), cur.pit()));
1093                 needsUpdate = true;
1094         }
1095         // is previous par empty?
1096         else if (prevcur.lastpos() == 0
1097                  || (prevcur.lastpos() == 1 && prevpar.isSeparator(0))) {
1098                 recordUndo(cur, Undo::ATOMIC, prevcur.pit(), cur.pit());
1099                 plist.erase(boost::next(plist.begin(), prevcur.pit()));
1100                 needsUpdate = true;
1101         }
1102         // Pasting is not allowed, if the paragraphs have different
1103         // layouts. I think it is a real bug of all other
1104         // word processors to allow it. It confuses the user.
1105         // Correction: Pasting is always allowed with standard-layout
1106         else if (par.layout() == prevpar.layout()
1107                  || par.layout() == tclass.defaultLayout()) {
1108                 recordUndo(cur, Undo::ATOMIC, prevcur.pit());
1109                 mergeParagraph(bufparams, plist, prevcur.pit());
1110                 needsUpdate = true;
1111         }
1112
1113         if (needsUpdate) {
1114                 updateLabels(cur.buffer());
1115                 setCursorIntern(cur, prevcur.pit(), prevcur.pos());
1116         }
1117
1118         return needsUpdate;
1119 }
1120
1121
1122 bool LyXText::backspace(LCursor & cur)
1123 {
1124         BOOST_ASSERT(this == cur.text());
1125         bool needsUpdate = false;
1126         if (cur.pos() == 0) {
1127                 if (cur.pit() == 0)
1128                         return dissolveInset(cur);
1129
1130                 Paragraph & prev_par = pars_[cur.pit() - 1];
1131
1132                 if (!prev_par.isMergedOnEndOfParDeletion(cur.buffer().params().trackChanges)) {
1133                         prev_par.setChange(prev_par.size(), Change(Change::DELETED));
1134                         setCursorIntern(cur, cur.pit() - 1, prev_par.size());
1135                         return true;
1136                 }
1137                 // The cursor is at the beginning of a paragraph, so
1138                 // the backspace will collapse two paragraphs into one.
1139                 needsUpdate = backspacePos0(cur);
1140
1141         } else {
1142                 // this is the code for a normal backspace, not pasting
1143                 // any paragraphs
1144                 recordUndo(cur, Undo::DELETE);
1145                 // We used to do cursorLeftIntern() here, but it is
1146                 // not a good idea since it triggers the auto-delete
1147                 // mechanism. So we do a cursorLeftIntern()-lite,
1148                 // without the dreaded mechanism. (JMarc)
1149                 setCursorIntern(cur, cur.pit(), cur.pos() - 1,
1150                                 false, cur.boundary());
1151                 cur.paragraph().eraseChar(cur.pos(), cur.buffer().params().trackChanges);
1152         }
1153
1154         if (cur.pos() == cur.lastpos())
1155                 setCurrentFont(cur);
1156
1157         // A singlePar update is not enough in this case.
1158 //              cur.updateFlags(Update::Force);
1159         setCursor(cur.top(), cur.pit(), cur.pos());
1160
1161         return needsUpdate;
1162 }
1163
1164
1165 bool LyXText::dissolveInset(LCursor & cur) {
1166         BOOST_ASSERT(this == cur.text());
1167
1168         if (isMainText(*cur.bv().buffer()) || cur.inset().nargs() != 1)
1169                 return false;
1170
1171         recordUndoInset(cur);
1172         cur.selHandle(false);
1173         // save position
1174         pos_type spos = cur.pos();
1175         pit_type spit = cur.pit();
1176         ParagraphList plist;
1177         if (cur.lastpit() != 0 || cur.lastpos() != 0)
1178                 plist = paragraphs();
1179         cur.popLeft();
1180         // store cursor offset
1181         if (spit == 0)
1182                 spos += cur.pos();
1183         spit += cur.pit();
1184         Buffer & b = cur.buffer();
1185         cur.paragraph().eraseChar(cur.pos(), b.params().trackChanges);
1186         if (!plist.empty()) {
1187                 // ERT paragraphs have the Language latex_language.
1188                 // This is invalid outside of ERT, so we need to
1189                 // change it to the buffer language.
1190                 ParagraphList::iterator it = plist.begin();
1191                 ParagraphList::iterator it_end = plist.end();
1192                 for (; it != it_end; it++) {
1193                         it->changeLanguage(b.params(), latex_language,
1194                                         b.getLanguage());
1195                 }
1196
1197                 pasteParagraphList(cur, plist, b.params().textclass,
1198                                    b.errorList("Paste"));
1199                 // restore position
1200                 cur.pit() = std::min(cur.lastpit(), spit);
1201                 cur.pos() = std::min(cur.lastpos(), spos);
1202         }
1203         cur.clearSelection();
1204         cur.resetAnchor();
1205         return true;
1206 }
1207
1208
1209 // only used for inset right now. should also be used for main text
1210 void LyXText::draw(PainterInfo & pi, int x, int y) const
1211 {
1212         paintTextInset(*this, pi, x, y);
1213 }
1214
1215
1216 // only used for inset right now. should also be used for main text
1217 void LyXText::drawSelection(PainterInfo & pi, int x, int) const
1218 {
1219         LCursor & cur = pi.base.bv->cursor();
1220         if (!cur.selection())
1221                 return;
1222         if (!ptr_cmp(cur.text(), this))
1223                 return;
1224
1225         if (lyxerr.debugging(Debug::DEBUG)) {
1226                 lyxerr[Debug::DEBUG]
1227                         << BOOST_CURRENT_FUNCTION
1228                         << "draw selection at " << x
1229                         << endl;
1230         }
1231
1232         DocIterator beg = cur.selectionBegin();
1233         DocIterator end = cur.selectionEnd();
1234
1235         BufferView & bv = *pi.base.bv;
1236         Buffer const & buffer = *bv.buffer();
1237
1238         // the selection doesn't touch the visible screen
1239         if (bv_funcs::status(&bv, beg) == bv_funcs::CUR_BELOW
1240             || bv_funcs::status(&bv, end) == bv_funcs::CUR_ABOVE)
1241                 return;
1242
1243         Paragraph const & par1 = pars_[beg.pit()];
1244         Paragraph const & par2 = pars_[end.pit()];
1245         TextMetrics const & tm = bv.textMetrics(this);
1246         ParagraphMetrics const & pm1 = tm.parMetrics(beg.pit());
1247         ParagraphMetrics const & pm2 = tm.parMetrics(end.pit());
1248
1249         bool const above = (bv_funcs::status(&bv, beg)
1250                             == bv_funcs::CUR_ABOVE);
1251         bool const below = (bv_funcs::status(&bv, end)
1252                             == bv_funcs::CUR_BELOW);
1253         int y1,y2,x1,x2;
1254         if (above) {
1255                 y1 = 0;
1256                 y2 = 0;
1257                 x1 = 0;
1258                 x2 = tm.width();
1259         } else {
1260                 Row const & row1 = pm1.getRow(beg.pos(), beg.boundary());
1261                 y1 = bv_funcs::getPos(bv, beg, beg.boundary()).y_ - row1.ascent();
1262                 y2 = y1 + row1.height();
1263                 int const startx = cursorX(bv, beg.top(), beg.boundary());
1264                 if (!isRTL(buffer, par1)) {
1265                         x1 = startx;
1266                         x2 = 0 + tm.width();
1267                 }
1268                 else {
1269                         x1 = 0;
1270                         x2 = startx;
1271                 }
1272         }
1273
1274         int Y1,Y2,X1,X2;
1275         if (below) {
1276                 Y1 = bv.workHeight();
1277                 Y2 = bv.workHeight();
1278                 X1 = 0;
1279                 X2 = tm.width();
1280         } else {
1281                 Row const & row2 = pm2.getRow(end.pos(), end.boundary());
1282                 Y1 = bv_funcs::getPos(bv, end, end.boundary()).y_ - row2.ascent();
1283                 Y2 = Y1 + row2.height();
1284                 int const endx = cursorX(bv, end.top(), end.boundary());
1285                 if (!isRTL(buffer, par2)) {
1286                         X1 = 0;
1287                         X2 = endx;
1288                 }
1289                 else {
1290                         X1 = endx;
1291                         X2 = 0 + tm.width();
1292                 }
1293         }
1294
1295         if (!above && !below && &pm1.getRow(beg.pos(), beg.boundary())
1296             == &pm2.getRow(end.pos(), end.boundary()))
1297         {
1298                 // paint only one rectangle
1299                 int const b( !isRTL(*bv.buffer(), par1) ? x + x1 : x + X1 );
1300                 int const w( !isRTL(*bv.buffer(), par1) ? X2 - x1 : x2 - X1 );
1301                 pi.pain.fillRectangle(b, y1, w, y2 - y1, LColor::selection);
1302                 return;
1303         }
1304
1305         if (lyxerr.debugging(Debug::DEBUG)) {
1306                 lyxerr[Debug::DEBUG] << " y1: " << y1 << " y2: " << y2
1307                            << "X1:" << X1 << " x2: " << X2 << " wid: " << tm.width()
1308                         << endl;
1309         }
1310
1311         // paint upper rectangle
1312         pi.pain.fillRectangle(x + x1, y1, x2 - x1, y2 - y1,
1313                                       LColor::selection);
1314         // paint bottom rectangle
1315         pi.pain.fillRectangle(x + X1, Y1, X2 - X1, Y2 - Y1,
1316                                       LColor::selection);
1317         // paint center rectangle
1318         pi.pain.fillRectangle(x, y2, tm.width(),
1319                               Y1 - y2, LColor::selection);
1320 }
1321
1322
1323 bool LyXText::isLastRow(pit_type pit, Row const & row) const
1324 {
1325         return row.endpos() >= pars_[pit].size()
1326                 && pit + 1 == pit_type(paragraphs().size());
1327 }
1328
1329
1330 bool LyXText::isFirstRow(pit_type pit, Row const & row) const
1331 {
1332         return row.pos() == 0 && pit == 0;
1333 }
1334
1335
1336 void LyXText::getWord(CursorSlice & from, CursorSlice & to,
1337         word_location const loc)
1338 {
1339         Paragraph const & from_par = pars_[from.pit()];
1340         switch (loc) {
1341         case WHOLE_WORD_STRICT:
1342                 if (from.pos() == 0 || from.pos() == from_par.size()
1343                     || !from_par.isLetter(from.pos())
1344                     || !from_par.isLetter(from.pos() - 1)) {
1345                         to = from;
1346                         return;
1347                 }
1348                 // no break here, we go to the next
1349
1350         case WHOLE_WORD:
1351                 // If we are already at the beginning of a word, do nothing
1352                 if (!from.pos() || !from_par.isLetter(from.pos() - 1))
1353                         break;
1354                 // no break here, we go to the next
1355
1356         case PREVIOUS_WORD:
1357                 // always move the cursor to the beginning of previous word
1358                 while (from.pos() && from_par.isLetter(from.pos() - 1))
1359                         --from.pos();
1360                 break;
1361         case NEXT_WORD:
1362                 lyxerr << "LyXText::getWord: NEXT_WORD not implemented yet"
1363                        << endl;
1364                 break;
1365         case PARTIAL_WORD:
1366                 // no need to move the 'from' cursor
1367                 break;
1368         }
1369         to = from;
1370         Paragraph & to_par = pars_[to.pit()];
1371         while (to.pos() < to_par.size() && to_par.isLetter(to.pos()))
1372                 ++to.pos();
1373 }
1374
1375
1376 void LyXText::write(Buffer const & buf, std::ostream & os) const
1377 {
1378         ParagraphList::const_iterator pit = paragraphs().begin();
1379         ParagraphList::const_iterator end = paragraphs().end();
1380         depth_type dth = 0;
1381         for (; pit != end; ++pit)
1382                 pit->write(buf, os, buf.params(), dth);
1383 }
1384
1385
1386 bool LyXText::read(Buffer const & buf, LyXLex & lex, ErrorList & errorList)
1387 {
1388         depth_type depth = 0;
1389
1390         while (lex.isOK()) {
1391                 lex.nextToken();
1392                 string const token = lex.getString();
1393
1394                 if (token.empty())
1395                         continue;
1396
1397                 if (token == "\\end_inset")
1398                         break;
1399
1400                 if (token == "\\end_body")
1401                         continue;
1402
1403                 if (token == "\\begin_body")
1404                         continue;
1405
1406                 if (token == "\\end_document")
1407                         return false;
1408
1409                 if (token == "\\begin_layout") {
1410                         lex.pushToken(token);
1411
1412                         Paragraph par;
1413                         par.params().depth(depth);
1414                         par.setFont(0, LyXFont(LyXFont::ALL_INHERIT, buf.params().language));
1415                         pars_.push_back(par);
1416
1417                         // FIXME: goddamn InsetTabular makes us pass a Buffer
1418                         // not BufferParams
1419                         lyx::readParagraph(buf, pars_.back(), lex, errorList);
1420
1421                 } else if (token == "\\begin_deeper") {
1422                         ++depth;
1423                 } else if (token == "\\end_deeper") {
1424                         if (!depth) {
1425                                 lex.printError("\\end_deeper: " "depth is already null");
1426                         } else {
1427                                 --depth;
1428                         }
1429                 } else {
1430                         lyxerr << "Handling unknown body token: `"
1431                                << token << '\'' << endl;
1432                 }
1433         }
1434         return true;
1435 }
1436
1437 int LyXText::cursorX(BufferView const & bv, CursorSlice const & sl,
1438                 bool boundary) const
1439 {
1440         TextMetrics const & tm = bv.textMetrics(sl.text());
1441         pit_type const pit = sl.pit();
1442         Paragraph const & par = pars_[pit];
1443         ParagraphMetrics const & pm = tm.parMetrics(pit);
1444         if (pm.rows().empty())
1445                 return 0;
1446
1447         pos_type ppos = sl.pos();
1448         // Correct position in front of big insets
1449         bool const boundary_correction = ppos != 0 && boundary;
1450         if (boundary_correction)
1451                 --ppos;
1452
1453         Row const & row = pm.getRow(sl.pos(), boundary);
1454
1455         pos_type cursor_vpos = 0;
1456
1457         Buffer const & buffer = *bv.buffer();
1458         RowMetrics const m = tm.computeRowMetrics(pit, row);
1459         double x = m.x;
1460
1461         pos_type const row_pos  = row.pos();
1462         pos_type const end      = row.endpos();
1463
1464         if (end <= row_pos)
1465                 cursor_vpos = row_pos;
1466         else if (ppos >= end)
1467                 cursor_vpos = isRTL(buffer, par) ? row_pos : end;
1468         else if (ppos > row_pos && ppos >= end)
1469                 // Place cursor after char at (logical) position pos - 1
1470                 cursor_vpos = (bidi.level(ppos - 1) % 2 == 0)
1471                         ? bidi.log2vis(ppos - 1) + 1 : bidi.log2vis(ppos - 1);
1472         else
1473                 // Place cursor before char at (logical) position ppos
1474                 cursor_vpos = (bidi.level(ppos) % 2 == 0)
1475                         ? bidi.log2vis(ppos) : bidi.log2vis(ppos) + 1;
1476
1477         pos_type body_pos = par.beginOfBody();
1478         if (body_pos > 0 &&
1479             (body_pos > end || !par.isLineSeparator(body_pos - 1)))
1480                 body_pos = 0;
1481
1482         // Use font span to speed things up, see below
1483         FontSpan font_span;
1484         LyXFont font;
1485         FontMetrics const & labelfm = theFontMetrics(
1486                 getLabelFont(buffer, par));
1487
1488         for (pos_type vpos = row_pos; vpos < cursor_vpos; ++vpos) {
1489                 pos_type pos = bidi.vis2log(vpos);
1490                 if (body_pos > 0 && pos == body_pos - 1) {
1491                         // FIXME UNICODE
1492                         docstring const lsep = from_utf8(par.layout()->labelsep);
1493                         x += m.label_hfill + labelfm.width(lsep);
1494                         if (par.isLineSeparator(body_pos - 1))
1495                                 x -= singleWidth(buffer, par, body_pos - 1);
1496                 }
1497
1498                 // Use font span to speed things up, see above
1499                 if (pos < font_span.first || pos > font_span.last) {
1500                         font_span = par.fontSpan(pos);
1501                         font = getFont(buffer, par, pos);
1502                 }
1503
1504                 x += singleWidth(par, pos, par.getChar(pos), font);
1505
1506                 if (par.hfillExpansion(row, pos))
1507                         x += (pos >= body_pos) ? m.hfill : m.label_hfill;
1508                 else if (par.isSeparator(pos) && pos >= body_pos)
1509                         x += m.separator;
1510         }
1511
1512         // see correction above
1513         if (boundary_correction)
1514                 if (getFont(buffer, par, ppos).isVisibleRightToLeft())
1515                         x -= singleWidth(buffer, par, ppos);
1516                 else
1517                         x += singleWidth(buffer, par, ppos);
1518
1519         // Make sure inside an inset we always count from the left
1520         // edge (bidi!) -- MV
1521         if (sl.pos() < par.size()) {
1522                 font = getFont(buffer, par, sl.pos());
1523                 if (!boundary && font.isVisibleRightToLeft()
1524                   && par.isInset(sl.pos()))
1525                         x -= par.getInset(sl.pos())->width();
1526         }
1527         return int(x);
1528 }
1529
1530
1531 int LyXText::cursorY(BufferView const & bv, CursorSlice const & sl, bool boundary) const
1532 {
1533         //lyxerr << "LyXText::cursorY: boundary: " << boundary << std::endl;
1534         ParagraphMetrics const & pm = bv.parMetrics(this, sl.pit());
1535         if (pm.rows().empty())
1536                 return 0;
1537
1538         int h = 0;
1539         h -= bv.parMetrics(this, 0).rows()[0].ascent();
1540         for (pit_type pit = 0; pit < sl.pit(); ++pit) {
1541                 h += bv.parMetrics(this, pit).height();
1542         }
1543         int pos = sl.pos();
1544         if (pos && boundary)
1545                 --pos;
1546         size_t const rend = pm.pos2row(pos);
1547         for (size_t rit = 0; rit != rend; ++rit)
1548                 h += pm.rows()[rit].height();
1549         h += pm.rows()[rend].ascent();
1550         return h;
1551 }
1552
1553
1554 // Returns the current font and depth as a message.
1555 docstring LyXText::currentState(LCursor & cur)
1556 {
1557         BOOST_ASSERT(this == cur.text());
1558         Buffer & buf = cur.buffer();
1559         Paragraph const & par = cur.paragraph();
1560         odocstringstream os;
1561
1562         if (buf.params().trackChanges)
1563                 os << "[C] ";
1564
1565         Change change = par.lookupChange(cur.pos());
1566
1567         if (change.type != Change::UNCHANGED) {
1568                 Author const & a = buf.params().authors().get(change.author);
1569                 os << _("Change: ") << a.name();
1570                 if (!a.email().empty())
1571                         os << " (" << a.email() << ")";
1572                 // FIXME ctime is english, we should translate that
1573                 os << _(" at ") << ctime(&change.changetime);
1574                 os << " : ";
1575         }
1576
1577         // I think we should only show changes from the default
1578         // font. (Asger)
1579         // No, from the document font (MV)
1580         LyXFont font = real_current_font;
1581         font.reduce(buf.params().getFont());
1582
1583         os << bformat(_("Font: %1$s"), font.stateText(&buf.params()));
1584
1585         // The paragraph depth
1586         int depth = cur.paragraph().getDepth();
1587         if (depth > 0)
1588                 os << bformat(_(", Depth: %1$d"), depth);
1589
1590         // The paragraph spacing, but only if different from
1591         // buffer spacing.
1592         Spacing const & spacing = par.params().spacing();
1593         if (!spacing.isDefault()) {
1594                 os << _(", Spacing: ");
1595                 switch (spacing.getSpace()) {
1596                 case Spacing::Single:
1597                         os << _("Single");
1598                         break;
1599                 case Spacing::Onehalf:
1600                         os << _("OneHalf");
1601                         break;
1602                 case Spacing::Double:
1603                         os << _("Double");
1604                         break;
1605                 case Spacing::Other:
1606                         os << _("Other (") << from_ascii(spacing.getValueAsString()) << ')';
1607                         break;
1608                 case Spacing::Default:
1609                         // should never happen, do nothing
1610                         break;
1611                 }
1612         }
1613
1614 #ifdef DEVEL_VERSION
1615         os << _(", Inset: ") << &cur.inset();
1616         os << _(", Paragraph: ") << cur.pit();
1617         os << _(", Id: ") << par.id();
1618         os << _(", Position: ") << cur.pos();
1619         os << _(", Boundary: ") << cur.boundary();
1620 //      Row & row = cur.textRow();
1621 //      os << bformat(_(", Row b:%1$d e:%2$d"), row.pos(), row.endpos());
1622 #endif
1623         return os.str();
1624 }
1625
1626
1627 docstring LyXText::getPossibleLabel(LCursor & cur) const
1628 {
1629         pit_type pit = cur.pit();
1630
1631         LyXLayout_ptr layout = pars_[pit].layout();
1632
1633         if (layout->latextype == LATEX_PARAGRAPH && pit != 0) {
1634                 LyXLayout_ptr const & layout2 = pars_[pit - 1].layout();
1635                 if (layout2->latextype != LATEX_PARAGRAPH) {
1636                         --pit;
1637                         layout = layout2;
1638                 }
1639         }
1640
1641         docstring name = from_ascii(layout->latexname());
1642
1643         // for captions, we want the abbreviation of the float type
1644         if (layout->labeltype == LABEL_SENSITIVE) {
1645                 // Search for the first float or wrap inset in the iterator
1646                 for (int i = cur.depth(); --i >= 0; ) {
1647                         InsetBase * const in = &cur[i].inset();
1648                         if (in->lyxCode() == InsetBase::FLOAT_CODE
1649                             || in->lyxCode() == InsetBase::WRAP_CODE) {
1650                                 name = in->getInsetName();
1651                                 break;
1652                         }
1653                 }
1654         }
1655
1656         docstring text = name.substr(0, 3);
1657         if (name == "theorem")
1658                 text = from_ascii("thm"); // Create a correct prefix for prettyref
1659
1660         text += ':';
1661         if (layout->latextype == LATEX_PARAGRAPH || lyxrc.label_init_length < 0)
1662                 text.erase();
1663
1664         docstring par_text = pars_[pit].asString(cur.buffer(), false);
1665         for (int i = 0; i < lyxrc.label_init_length; ++i) {
1666                 if (par_text.empty())
1667                         break;
1668                 docstring head;
1669                 par_text = split(par_text, head, ' ');
1670                 // Is it legal to use spaces in labels ?
1671                 if (i > 0)
1672                         text += '-';
1673                 text += head;
1674         }
1675
1676         return text;
1677 }
1678
1679
1680 void LyXText::setCursorFromCoordinates(LCursor & cur, int const x, int const y)
1681 {
1682         BOOST_ASSERT(this == cur.text());
1683         pit_type pit = getPitNearY(cur.bv(), y);
1684
1685         TextMetrics const & tm = cur.bv().textMetrics(this);
1686         ParagraphMetrics const & pm = tm.parMetrics(pit);
1687
1688         int yy = cur.bv().coordCache().get(this, pit).y_ - pm.ascent();
1689         lyxerr[Debug::DEBUG]
1690                 << BOOST_CURRENT_FUNCTION
1691                 << ": x: " << x
1692                 << " y: " << y
1693                 << " pit: " << pit
1694                 << " yy: " << yy << endl;
1695
1696         int r = 0;
1697         BOOST_ASSERT(pm.rows().size());
1698         for (; r < int(pm.rows().size()) - 1; ++r) {
1699                 Row const & row = pm.rows()[r];
1700                 if (int(yy + row.height()) > y)
1701                         break;
1702                 yy += row.height();
1703         }
1704
1705         Row const & row = pm.rows()[r];
1706
1707         lyxerr[Debug::DEBUG]
1708                 << BOOST_CURRENT_FUNCTION
1709                 << ": row " << r
1710                 << " from pos: " << row.pos()
1711                 << endl;
1712
1713         bool bound = false;
1714         int xx = x;
1715         pos_type const pos = row.pos()
1716                 + tm.getColumnNearX(pit, row, xx, bound);
1717
1718         lyxerr[Debug::DEBUG]
1719                 << BOOST_CURRENT_FUNCTION
1720                 << ": setting cursor pit: " << pit
1721                 << " pos: " << pos
1722                 << endl;
1723
1724         setCursor(cur, pit, pos, true, bound);
1725 }
1726
1727
1728 void LyXText::charsTranspose(LCursor & cur)
1729 {
1730         BOOST_ASSERT(this == cur.text());
1731
1732         pos_type pos = cur.pos();
1733
1734         // If cursor is at beginning or end of paragraph, do nothing.
1735         if (pos == cur.lastpos() || pos == 0)
1736                 return;
1737
1738         Paragraph & par = cur.paragraph();
1739
1740         // Get the positions of the characters to be transposed.
1741         pos_type pos1 = pos - 1;
1742         pos_type pos2 = pos;
1743
1744         // In change tracking mode, ignore deleted characters.
1745         while (pos2 < cur.lastpos() && par.isDeleted(pos2))
1746                 ++pos2;
1747         if (pos2 == cur.lastpos())
1748                 return;
1749
1750         while (pos1 >= 0 && par.isDeleted(pos1))
1751                 --pos1;
1752         if (pos1 < 0)
1753                 return;
1754
1755         // Don't do anything if one of the "characters" is not regular text.
1756         if (par.isInset(pos1) || par.isInset(pos2))
1757                 return;
1758
1759         // Store the characters to be transposed (including font information).
1760         char_type char1 = par.getChar(pos1);
1761         LyXFont const font1 =
1762                 par.getFontSettings(cur.buffer().params(), pos1);
1763
1764         char_type char2 = par.getChar(pos2);
1765         LyXFont const font2 =
1766                 par.getFontSettings(cur.buffer().params(), pos2);
1767
1768         // And finally, we are ready to perform the transposition.
1769         // Track the changes if Change Tracking is enabled.
1770         bool const trackChanges = cur.buffer().params().trackChanges;
1771
1772         recordUndo(cur);
1773
1774         par.eraseChar(pos2, trackChanges);
1775         par.eraseChar(pos1, trackChanges);
1776         par.insertChar(pos1, char2, font2, trackChanges);
1777         par.insertChar(pos2, char1, font1, trackChanges);
1778
1779         // After the transposition, move cursor to after the transposition.
1780         setCursor(cur, cur.pit(), pos2);
1781         cur.forwardPos();
1782 }
1783
1784
1785 } // namespace lyx