src/text.C

   1 /**
   2  * \file 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 #include "gettext.h"
  21 #include "buffer.h"
  22 #include "debug.h"
  23 #include "encoding.h"
  24 #include "funcrequest.h"
  25 #include "frontends/LyXView.h"
  26 #include "frontends/font_metrics.h"
  27 #include "BufferView.h"
  28 #include "language.h"
  29 #include "ParagraphParameters.h"
  30 #include "undo_funcs.h"
  31 #include "text_funcs.h"
  32 #include "WordLangTuple.h"
  33 #include "paragraph_funcs.h"
  34 #include "rowpainter.h"
  35 #include "lyxrow.h"
  36 #include "lyxrow_funcs.h"
  37
  38 #include "insets/insettext.h"
  39
  40 #include "support/textutils.h"
  41 #include "support/LAssert.h"
  42 #include "support/lstrings.h"
  43
  44
  45 using namespace lyx::support;
  46
  47 using std::max;
  48 using std::min;
  49 using std::endl;
  50 using std::pair;
  51
  52 using lyx::pos_type;
  53 using lyx::word_location;
  54
  55 using namespace bv_funcs;
  56
  57 /// top, right, bottom pixel margin
  58 extern int const PAPER_MARGIN = 20;
  59 /// margin for changebar
  60 extern int const CHANGEBAR_MARGIN = 10;
  61 /// left margin
  62 extern int const LEFT_MARGIN = PAPER_MARGIN + CHANGEBAR_MARGIN;
  63
  64
  65
  66 int bibitemMaxWidth(BufferView *, LyXFont const &);
  67
  68
  69 BufferView * LyXText::bv()
  70 {
  71         Assert(bv_owner != 0);
  72         return bv_owner;
  73 }
  74
  75
  76 BufferView * LyXText::bv() const
  77 {
  78         Assert(bv_owner != 0);
  79         return bv_owner;
  80 }
  81
  82
  83 void LyXText::updateRowPositions()
  84 {
  85         ParagraphList::iterator pit = ownerParagraphs().begin();
  86         ParagraphList::iterator end = ownerParagraphs().end();
  87         for (height = 0; pit != end; ++pit) {
  88                 RowList::iterator rit = pit->rows.begin();
  89                 RowList::iterator rend = pit->rows.end();
  90                 for ( ; rit != rend ; rit = ++rit) {
  91                         rit->y(height);
  92                         height += rit->height();
  93                 }
  94         }
  95 }
  96
  97
  98 int LyXText::workWidth() const
  99 {
 100         return inset_owner ? inset_owner->textWidth() : bv()->workWidth();
 101 }
 102
 103
 104 int LyXText::getRealCursorX() const
 105 {
 106         int x = cursor.x();
 107         if (the_locking_inset && (the_locking_inset->getLyXText(bv())!= this))
 108                 x = the_locking_inset->getLyXText(bv())->getRealCursorX();
 109         return x;
 110 }
 111
 112
 113 #warning FIXME  This function seems to belong outside of LyxText.
 114 unsigned char LyXText::transformChar(unsigned char c, Paragraph const & par,
 115                                      pos_type pos) const
 116 {
 117         if (!Encodings::is_arabic(c))
 118                 if (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 && IsDigit(c))
 119                         return c + (0xb0 - '0');
 120                 else
 121                         return c;
 122
 123         unsigned char const prev_char = pos > 0 ? par.getChar(pos - 1) : ' ';
 124         unsigned char next_char = ' ';
 125
 126         pos_type const par_size = par.size();
 127
 128         for (pos_type i = pos + 1; i < par_size; ++i) {
 129                 unsigned char const par_char = par.getChar(i);
 130                 if (!Encodings::IsComposeChar_arabic(par_char)) {
 131                         next_char = par_char;
 132                         break;
 133                 }
 134         }
 135
 136         if (Encodings::is_arabic(next_char)) {
 137                 if (Encodings::is_arabic(prev_char) &&
 138                         !Encodings::is_arabic_special(prev_char))
 139                         return Encodings::TransformChar(c, Encodings::FORM_MEDIAL);
 140                 else
 141                         return Encodings::TransformChar(c, Encodings::FORM_INITIAL);
 142         } else {
 143                 if (Encodings::is_arabic(prev_char) &&
 144                         !Encodings::is_arabic_special(prev_char))
 145                         return Encodings::TransformChar(c, Encodings::FORM_FINAL);
 146                 else
 147                         return Encodings::TransformChar(c, Encodings::FORM_ISOLATED);
 148         }
 149 }
 150
 151 // This is the comments that some of the warnings below refers to.
 152 // There are some issues in this file and I don't think they are
 153 // really related to the FIX_DOUBLE_SPACE patch. I'd rather think that
 154 // this is a problem that has been here almost from day one and that a
 155 // larger userbase with differenct access patters triggers the bad
 156 // behaviour. (segfaults.) What I think happen is: In several places
 157 // we store the paragraph in the current cursor and then moves the
 158 // cursor. This movement of the cursor will delete paragraph at the
 159 // old position if it is now empty. This will make the temporary
 160 // pointer to the old cursor paragraph invalid and dangerous to use.
 161 // And is some cases this will trigger a segfault. I have marked some
 162 // of the cases where this happens with a warning, but I am sure there
 163 // are others in this file and in text2.C. There is also a note in
 164 // Delete() that you should read. In Delete I store the paragraph->id
 165 // instead of a pointer to the paragraph. I am pretty sure this faulty
 166 // use of temporary pointers to paragraphs that might have gotten
 167 // invalidated (through a cursor movement) before they are used, are
 168 // the cause of the strange crashes we get reported often.
 169 //
 170 // It is very tiresom to change this code, especially when it is as
 171 // hard to read as it is. Help to fix all the cases where this is done
 172 // would be greately appreciated.
 173 //
 174 // Lgb
 175
 176 int LyXText::singleWidth(ParagraphList::iterator pit, pos_type pos) const
 177 {
 178         if (pos >= pit->size())
 179                 return 0;
 180
 181         char const c = pit->getChar(pos);
 182         LyXFont const & font = getFont(pit, pos);
 183         return singleWidth(pit, pos, c, font);
 184 }
 185
 186
 187 int LyXText::singleWidth(ParagraphList::iterator pit,
 188                          pos_type pos, char c, LyXFont const & font) const
 189 {
 190         if (pos >= pit->size()) {
 191                 lyxerr << "in singleWidth(), pos: " << pos << endl;
 192                 Assert(false);
 193                 return 0;
 194         }
 195
 196
 197         // The most common case is handled first (Asger)
 198         if (IsPrintable(c)) {
 199                 if (font.language()->RightToLeft()) {
 200                         if ((lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 201                              lyxrc.font_norm_type == LyXRC::ISO_10646_1)
 202                             && font.language()->lang() == "arabic") {
 203                                 if (Encodings::IsComposeChar_arabic(c))
 204                                         return 0;
 205                                 else
 206                                         c = transformChar(c, *pit, pos);
 207                         } else if (font.language()->lang() == "hebrew" &&
 208                                  Encodings::IsComposeChar_hebrew(c))
 209                                 return 0;
 210                 }
 211                 return font_metrics::width(c, font);
 212         }
 213
 214         if (c == Paragraph::META_INSET) {
 215                 InsetOld * tmpinset = pit->getInset(pos);
 216                 Assert(tmpinset);
 217                 if (tmpinset->lyxCode() == InsetOld::HFILL_CODE) {
 218                         // Because of the representation as vertical lines
 219                         return 3;
 220                 }
 221                 return tmpinset->width();
 222         }
 223
 224         if (IsSeparatorChar(c))
 225                 c = ' ';
 226         return font_metrics::width(c, font);
 227 }
 228
 229
 230 lyx::pos_type LyXText::log2vis(lyx::pos_type pos) const
 231 {
 232         if (bidi_start == -1)
 233                 return pos;
 234         else
 235                 return log2vis_list[pos - bidi_start];
 236 }
 237
 238
 239 lyx::pos_type LyXText::vis2log(lyx::pos_type pos) const
 240 {
 241         if (bidi_start == -1)
 242                 return pos;
 243         else
 244                 return vis2log_list[pos - bidi_start];
 245 }
 246
 247
 248 lyx::pos_type LyXText::bidi_level(lyx::pos_type pos) const
 249 {
 250         if (bidi_start == -1)
 251                 return 0;
 252         else
 253                 return bidi_levels[pos - bidi_start];
 254 }
 255
 256
 257 bool LyXText::bidi_InRange(lyx::pos_type pos) const
 258 {
 259         return bidi_start == -1 ||
 260                 (bidi_start <= pos && pos <= bidi_end);
 261 }
 262
 263
 264 void LyXText::computeBidiTables(ParagraphList::iterator pit,
 265    Buffer const & buf, RowList::iterator row) const
 266 {
 267         bidi_same_direction = true;
 268         if (!lyxrc.rtl_support) {
 269                 bidi_start = -1;
 270                 return;
 271         }
 272
 273         InsetOld * inset = pit->inInset();
 274         if (inset && inset->owner() &&
 275             inset->owner()->lyxCode() == InsetOld::ERT_CODE) {
 276                 bidi_start = -1;
 277                 return;
 278         }
 279
 280         bidi_start = row->pos();
 281         bidi_end = lastPos(*pit, row);
 282
 283         if (bidi_start > bidi_end) {
 284                 bidi_start = -1;
 285                 return;
 286         }
 287
 288         if (bidi_end + 2 - bidi_start >
 289             static_cast<pos_type>(log2vis_list.size())) {
 290                 pos_type new_size =
 291                         (bidi_end + 2 - bidi_start < 500) ?
 292                         500 : 2 * (bidi_end + 2 - bidi_start);
 293                 log2vis_list.resize(new_size);
 294                 vis2log_list.resize(new_size);
 295                 bidi_levels.resize(new_size);
 296         }
 297
 298         vis2log_list[bidi_end + 1 - bidi_start] = -1;
 299         log2vis_list[bidi_end + 1 - bidi_start] = -1;
 300
 301         pos_type stack[2];
 302         bool const rtl_par =
 303                 pit->isRightToLeftPar(buf.params);
 304         int level = 0;
 305         bool rtl = false;
 306         bool rtl0 = false;
 307         pos_type const body_pos = pit->beginningOfBody();
 308
 309         for (pos_type lpos = bidi_start; lpos <= bidi_end; ++lpos) {
 310                 bool is_space = pit->isLineSeparator(lpos);
 311                 pos_type const pos =
 312                         (is_space && lpos + 1 <= bidi_end &&
 313                          !pit->isLineSeparator(lpos + 1) &&
 314                          !pit->isNewline(lpos + 1))
 315                         ? lpos + 1 : lpos;
 316                 LyXFont font = pit->getFontSettings(buf.params, pos);
 317                 if (pos != lpos && 0 < lpos && rtl0 && font.isRightToLeft() &&
 318                     font.number() == LyXFont::ON &&
 319                     pit->getFontSettings(buf.params, lpos - 1).number()
 320                     == LyXFont::ON) {
 321                         font = pit->getFontSettings(buf.params, lpos);
 322                         is_space = false;
 323                 }
 324
 325
 326                 bool new_rtl = font.isVisibleRightToLeft();
 327                 bool new_rtl0 = font.isRightToLeft();
 328                 int new_level;
 329
 330                 if (lpos == body_pos - 1
 331                     && row->pos() < body_pos - 1
 332                     && is_space) {
 333                         new_level = (rtl_par) ? 1 : 0;
 334                         new_rtl = new_rtl0 = rtl_par;
 335                 } else if (new_rtl0)
 336                         new_level = (new_rtl) ? 1 : 2;
 337                 else
 338                         new_level = (rtl_par) ? 2 : 0;
 339
 340                 if (is_space && new_level >= level) {
 341                         new_level = level;
 342                         new_rtl = rtl;
 343                         new_rtl0 = rtl0;
 344                 }
 345
 346                 int new_level2 = new_level;
 347
 348                 if (level == new_level && rtl0 != new_rtl0) {
 349                         --new_level2;
 350                         log2vis_list[lpos - bidi_start] = (rtl) ? 1 : -1;
 351                 } else if (level < new_level) {
 352                         log2vis_list[lpos - bidi_start] =  (rtl) ? -1 : 1;
 353                         if (new_level > rtl_par)
 354                                 bidi_same_direction = false;
 355                 } else
 356                         log2vis_list[lpos - bidi_start] = (new_rtl) ? -1 : 1;
 357                 rtl = new_rtl;
 358                 rtl0 = new_rtl0;
 359                 bidi_levels[lpos - bidi_start] = new_level;
 360
 361                 while (level > new_level2) {
 362                         pos_type old_lpos = stack[--level];
 363                         int delta = lpos - old_lpos - 1;
 364                         if (level % 2)
 365                                 delta = -delta;
 366                         log2vis_list[lpos - bidi_start] += delta;
 367                         log2vis_list[old_lpos - bidi_start] += delta;
 368                 }
 369                 while (level < new_level)
 370                         stack[level++] = lpos;
 371         }
 372
 373         while (level > 0) {
 374                 pos_type const old_lpos = stack[--level];
 375                 int delta = bidi_end - old_lpos;
 376                 if (level % 2)
 377                         delta = -delta;
 378                 log2vis_list[old_lpos - bidi_start] += delta;
 379         }
 380
 381         pos_type vpos = bidi_start - 1;
 382         for (pos_type lpos = bidi_start;
 383              lpos <= bidi_end; ++lpos) {
 384                 vpos += log2vis_list[lpos - bidi_start];
 385                 vis2log_list[vpos - bidi_start] = lpos;
 386                 log2vis_list[lpos - bidi_start] = vpos;
 387         }
 388 }
 389
 390
 391 // This method requires a previous call to ComputeBidiTables()
 392 bool LyXText::isBoundary(Buffer const & buf, Paragraph const & par,
 393                          pos_type pos) const
 394 {
 395         if (!lyxrc.rtl_support || pos == 0)
 396                 return false;
 397
 398         if (!bidi_InRange(pos - 1)) {
 399                 /// This can happen if pos is the first char of a row.
 400                 /// Returning false in this case is incorrect!
 401                 return false;
 402         }
 403
 404         bool const rtl = bidi_level(pos - 1) % 2;
 405         bool const rtl2 = bidi_InRange(pos)
 406                 ? bidi_level(pos) % 2
 407                 : par.isRightToLeftPar(buf.params);
 408         return rtl != rtl2;
 409 }
 410
 411
 412 bool LyXText::isBoundary(Buffer const & buf, Paragraph const & par,
 413                          pos_type pos, LyXFont const & font) const
 414 {
 415         if (!lyxrc.rtl_support)
 416                 return false;    // This is just for speedup
 417
 418         bool const rtl = font.isVisibleRightToLeft();
 419         bool const rtl2 = bidi_InRange(pos)
 420                 ? bidi_level(pos) % 2
 421                 : par.isRightToLeftPar(buf.params);
 422         return rtl != rtl2;
 423 }
 424
 425
 426 int LyXText::leftMargin(ParagraphList::iterator pit, Row const & row) const
 427 {
 428         LyXTextClass const & tclass =
 429                 bv()->buffer()->params.getLyXTextClass();
 430         LyXLayout_ptr const & layout = pit->layout();
 431
 432         string parindent = layout->parindent;
 433
 434         int x = LEFT_MARGIN;
 435
 436         x += font_metrics::signedWidth(tclass.leftmargin(), tclass.defaultfont());
 437
 438         // this is the way, LyX handles the LaTeX-Environments.
 439         // I have had this idea very late, so it seems to be a
 440         // later added hack and this is true
 441         if (!pit->getDepth()) {
 442                 if (pit->layout() == tclass.defaultLayout()) {
 443                         // find the previous same level paragraph
 444                         if (pit != ownerParagraphs().begin()) {
 445                                 ParagraphList::iterator newpit =
 446                                         depthHook(pit, ownerParagraphs(),
 447                                                   pit->getDepth());
 448                                 if (newpit == pit &&
 449                                     newpit->layout()->nextnoindent)
 450                                         parindent.erase();
 451                         }
 452                 }
 453         } else {
 454                 // find the next level paragraph
 455
 456                 ParagraphList::iterator newpar = outerHook(pit,
 457                                                            ownerParagraphs());
 458
 459                 // make a corresponding row. Needed to call leftMargin()
 460
 461                 // check wether it is a sufficent paragraph
 462                 if (newpar != ownerParagraphs().end() &&
 463                     newpar->layout()->isEnvironment()) {
 464                         x = leftMargin(newpar, Row(newpar->size()));
 465                 }
 466
 467                 if (newpar != ownerParagraphs().end() &&
 468                     pit->layout() == tclass.defaultLayout()) {
 469                         if (newpar->params().noindent())
 470                                 parindent.erase();
 471                         else {
 472                                 parindent = newpar->layout()->parindent;
 473                         }
 474
 475                 }
 476         }
 477
 478         LyXFont const labelfont = getLabelFont(pit);
 479         switch (layout->margintype) {
 480         case MARGIN_DYNAMIC:
 481                 if (!layout->leftmargin.empty()) {
 482                         x += font_metrics::signedWidth(layout->leftmargin,
 483                                                   tclass.defaultfont());
 484                 }
 485                 if (!pit->getLabelstring().empty()) {
 486                         x += font_metrics::signedWidth(layout->labelindent,
 487                                                   labelfont);
 488                         x += font_metrics::width(pit->getLabelstring(),
 489                                             labelfont);
 490                         x += font_metrics::width(layout->labelsep, labelfont);
 491                 }
 492                 break;
 493         case MARGIN_MANUAL:
 494                 x += font_metrics::signedWidth(layout->labelindent, labelfont);
 495                 // The width of an empty par, even with manual label, should be 0
 496                 if (!pit->empty() && row.pos() >= pit->beginningOfBody()) {
 497                         if (!pit->getLabelWidthString().empty()) {
 498                                 x += font_metrics::width(pit->getLabelWidthString(),
 499                                                labelfont);
 500                                 x += font_metrics::width(layout->labelsep, labelfont);
 501                         }
 502                 }
 503                 break;
 504         case MARGIN_STATIC:
 505                 x += font_metrics::signedWidth(layout->leftmargin, tclass.defaultfont()) * 4
 506                         / (pit->getDepth() + 4);
 507                 break;
 508         case MARGIN_FIRST_DYNAMIC:
 509                 if (layout->labeltype == LABEL_MANUAL) {
 510                         if (row.pos() >= pit->beginningOfBody()) {
 511                                 x += font_metrics::signedWidth(layout->leftmargin,
 512                                                           labelfont);
 513                         } else {
 514                                 x += font_metrics::signedWidth(layout->labelindent,
 515                                                           labelfont);
 516                         }
 517                 } else if (row.pos()
 518                            // Special case to fix problems with
 519                            // theorems (JMarc)
 520                            || (layout->labeltype == LABEL_STATIC
 521                                && layout->latextype == LATEX_ENVIRONMENT
 522                                && !isFirstInSequence(pit, ownerParagraphs()))) {
 523                         x += font_metrics::signedWidth(layout->leftmargin,
 524                                                   labelfont);
 525                 } else if (layout->labeltype != LABEL_TOP_ENVIRONMENT
 526                            && layout->labeltype != LABEL_BIBLIO
 527                            && layout->labeltype !=
 528                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 529                         x += font_metrics::signedWidth(layout->labelindent,
 530                                                   labelfont);
 531                         x += font_metrics::width(layout->labelsep, labelfont);
 532                         x += font_metrics::width(pit->getLabelstring(),
 533                                             labelfont);
 534                 }
 535                 break;
 536
 537         case MARGIN_RIGHT_ADDRESS_BOX:
 538         {
 539                 // ok, a terrible hack. The left margin depends on the widest
 540                 // row in this paragraph. Do not care about footnotes, they
 541                 // are *NOT* allowed in the LaTeX realisation of this layout.
 542
 543                 // find the first row of this paragraph
 544                 RowList::iterator rit = pit->rows.begin();
 545                 RowList::iterator end = pit->rows.end();
 546                 int minfill = rit->fill();
 547                 for ( ; rit != end; ++rit)
 548                         if (rit->fill() < minfill)
 549                                 minfill = rit->fill();
 550
 551                 x += font_metrics::signedWidth(layout->leftmargin,
 552                         tclass.defaultfont());
 553                 x += minfill;
 554         }
 555         break;
 556         }
 557
 558         if (workWidth() > 0 && !pit->params().leftIndent().zero()) {
 559                 LyXLength const len = pit->params().leftIndent();
 560                 int const tw = inset_owner ?
 561                         inset_owner->latexTextWidth(bv()) : workWidth();
 562                 x += len.inPixels(tw);
 563         }
 564
 565         LyXAlignment align;
 566
 567         if (pit->params().align() == LYX_ALIGN_LAYOUT)
 568                 align = layout->align;
 569         else
 570                 align = pit->params().align();
 571
 572         // set the correct parindent
 573         if (row.pos() == 0) {
 574                 if ((layout->labeltype == LABEL_NO_LABEL
 575                      || layout->labeltype == LABEL_TOP_ENVIRONMENT
 576                      || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 577                      || (layout->labeltype == LABEL_STATIC
 578                          && layout->latextype == LATEX_ENVIRONMENT
 579                          && !isFirstInSequence(pit, ownerParagraphs())))
 580                     && align == LYX_ALIGN_BLOCK
 581                     && !pit->params().noindent()
 582                         // in tabulars and ert paragraphs are never indented!
 583                         && (!pit->inInset() || !pit->inInset()->owner() ||
 584                                 (pit->inInset()->owner()->lyxCode() != InsetOld::TABULAR_CODE &&
 585                                  pit->inInset()->owner()->lyxCode() != InsetOld::ERT_CODE))
 586                     && (pit->layout() != tclass.defaultLayout() ||
 587                         bv()->buffer()->params.paragraph_separation ==
 588                         BufferParams::PARSEP_INDENT)) {
 589                         x += font_metrics::signedWidth(parindent,
 590                                                   tclass.defaultfont());
 591                 } else if (layout->labeltype == LABEL_BIBLIO) {
 592                         // ale970405 Right width for bibitems
 593                         x += bibitemMaxWidth(bv(), tclass.defaultfont());
 594                 }
 595         }
 596
 597         return x;
 598 }
 599
 600
 601 int LyXText::rightMargin(ParagraphList::iterator pit,
 602         Buffer const & buf, Row const &) const
 603 {
 604         LyXTextClass const & tclass = buf.params.getLyXTextClass();
 605         LyXLayout_ptr const & layout = pit->layout();
 606
 607         return PAPER_MARGIN
 608                 + font_metrics::signedWidth(tclass.rightmargin(),
 609                                        tclass.defaultfont());
 610                 + font_metrics::signedWidth(layout->rightmargin,
 611                                        tclass.defaultfont())
 612                 * 4 / (pit->getDepth() + 4);
 613 }
 614
 615
 616 int LyXText::labelEnd(ParagraphList::iterator pit, Row const & row) const
 617 {
 618         if (pit->layout()->margintype == MARGIN_MANUAL) {
 619                 Row tmprow = row;
 620                 tmprow.pos(pit->size());
 621                 // return the beginning of the body
 622                 return leftMargin(pit, tmprow);
 623         }
 624
 625         // LabelEnd is only needed if the layout
 626         // fills a flushleft label.
 627         return 0;
 628 }
 629
 630
 631 namespace {
 632
 633 // this needs special handling - only newlines count as a break point
 634 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
 635 {
 636         for (; i < par.size(); ++i) {
 637                 if (par.isNewline(i))
 638                         return i;
 639         }
 640
 641         return par.size();
 642 }
 643
 644 };
 645
 646
 647 pos_type LyXText::rowBreakPoint(ParagraphList::iterator pit,
 648         Row const & row) const
 649 {
 650         // maximum pixel width of a row.
 651         int width = workWidth()
 652                 - rightMargin(pit, *bv()->buffer(), row);
 653
 654         // inset->textWidth() returns -1 via workWidth(),
 655         // but why ?
 656         if (width < 0)
 657                 return pit->size();
 658
 659         LyXLayout_ptr const & layout = pit->layout();
 660
 661         if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX)
 662                 return addressBreakPoint(row.pos(), *pit);
 663
 664         pos_type const pos = row.pos();
 665         pos_type const body_pos = pit->beginningOfBody();
 666         pos_type const last = pit->size();
 667         pos_type point = last;
 668
 669         if (pos == last)
 670                 return last;
 671
 672         // Now we iterate through until we reach the right margin
 673         // or the end of the par, then choose the possible break
 674         // nearest that.
 675
 676         int const left = leftMargin(pit, row);
 677         int x = left;
 678
 679         // pixel width since last breakpoint
 680         int chunkwidth = 0;
 681
 682         pos_type i = pos;
 683
 684         // We re-use the font resolution for the entire font span when possible
 685         LyXFont font = getFont(pit, i);
 686         lyx::pos_type endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 687
 688         for (; i < last; ++i) {
 689                 if (pit->isNewline(i)) {
 690                         point = i;
 691                         break;
 692                 }
 693
 694                 char const c = pit->getChar(i);
 695                 if (i > endPosOfFontSpan) {
 696                         font = getFont(pit, i);
 697                         endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 698                 }
 699
 700                 int thiswidth;
 701
 702                 // add the auto-hfill from label end to the body
 703                 if (body_pos && i == body_pos) {
 704                         thiswidth = font_metrics::width(layout->labelsep, getLabelFont(pit));
 705                         if (pit->isLineSeparator(i - 1))
 706                                 thiswidth -= singleWidth(pit, i - 1);
 707                         int left_margin = labelEnd(pit, row);
 708                         if (thiswidth + x < left_margin)
 709                                 thiswidth = left_margin - x;
 710                         thiswidth += singleWidth(pit, i, c, font);
 711                 } else {
 712                         thiswidth = singleWidth(pit, i, c, font);
 713                 }
 714
 715                 x += thiswidth;
 716                 chunkwidth += thiswidth;
 717
 718                 InsetOld * in = pit->isInset(i) ? pit->getInset(i) : 0;
 719
 720                 // break before a character that will fall off
 721                 // the right of the row
 722                 if (x >= width) {
 723                         // if no break before, break here
 724                         if (point == last || chunkwidth >= (width - left)) {
 725                                 if (pos < i)
 726                                         point = i - 1;
 727                                 else
 728                                         point = i;
 729                         }
 730                         break;
 731                 }
 732
 733                 if (!in || in->isChar()) {
 734                         // some insets are line separators too
 735                         if (pit->isLineSeparator(i)) {
 736                                 point = i;
 737                                 chunkwidth = 0;
 738                         }
 739                         continue;
 740                 }
 741
 742                 continue;
 743         }
 744
 745         if (point == last && x >= width) {
 746                 // didn't find one, break at the point we reached the edge
 747                 point = i;
 748         } else if (i == last && x < width) {
 749                 // found one, but we fell off the end of the par, so prefer
 750                 // that.
 751                 point = last;
 752         }
 753
 754         // manual labels cannot be broken in LaTeX. But we
 755         // want to make our on-screen rendering of footnotes
 756         // etc. still break
 757         if (body_pos && point < body_pos)
 758                 point = body_pos - 1;
 759
 760         return point;
 761 }
 762
 763
 764 // returns the minimum space a row needs on the screen in pixel
 765 int LyXText::fill(ParagraphList::iterator pit,
 766         RowList::iterator row, int paper_width) const
 767 {
 768         if (paper_width < 0)
 769                 return 0;
 770
 771         int w;
 772         // get the pure distance
 773         pos_type const last = lastPos(*pit, row);
 774
 775         LyXLayout_ptr const & layout = pit->layout();
 776
 777         // special handling of the right address boxes
 778         if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX) {
 779                 int const tmpfill = row->fill();
 780                 row->fill(0); // the minfill in MarginLeft()
 781                 w = leftMargin(pit, *row);
 782                 row->fill(tmpfill);
 783         } else
 784                 w = leftMargin(pit, *row);
 785
 786         pos_type const body_pos = pit->beginningOfBody();
 787         pos_type i = row->pos();
 788
 789         if (! pit->empty() && i <= last) {
 790                 // We re-use the font resolution for the entire span when possible
 791                 LyXFont font = getFont(pit, i);
 792                 lyx::pos_type endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 793                 while (i <= last) {
 794                         if (body_pos > 0 && i == body_pos) {
 795                                 w += font_metrics::width(layout->labelsep, getLabelFont(pit));
 796                                 if (pit->isLineSeparator(i - 1))
 797                                         w -= singleWidth(pit, i - 1);
 798                                 int left_margin = labelEnd(pit, *row);
 799                                 if (w < left_margin)
 800                                         w = left_margin;
 801                         }
 802                         char const c = pit->getChar(i);
 803                         if (IsPrintable(c) && i > endPosOfFontSpan) {
 804                                 // We need to get the next font
 805                                 font = getFont(pit, i);
 806                                 endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 807                         }
 808                         w += singleWidth(pit, i, c, font);
 809                         ++i;
 810                 }
 811         }
 812         if (body_pos > 0 && body_pos > last) {
 813                 w += font_metrics::width(layout->labelsep, getLabelFont(pit));
 814                 if (last >= 0 && pit->isLineSeparator(last))
 815                         w -= singleWidth(pit, last);
 816                 int const left_margin = labelEnd(pit, *row);
 817                 if (w < left_margin)
 818                         w = left_margin;
 819         }
 820
 821         int const fill = paper_width - w - rightMargin(pit, *bv()->buffer(), *row);
 822
 823         // If this case happens, it means that our calculation
 824         // of the widths of the chars when we do rowBreakPoint()
 825         // went wrong for some reason. Typically in list bodies.
 826         // Things just about hobble on anyway, though you'll end
 827         // up with a "fill_separator" less than zero, which corresponds
 828         // to inter-word spacing being too small. Hopefully this problem
 829         // will die when the label hacks die.
 830         if (lyxerr.debugging() && fill < 0) {
 831                 lyxerr[Debug::GUI] << "Eek, fill() was < 0: " << fill
 832                         << " w " << w << " paper_width " << paper_width
 833                         << " right margin " << rightMargin(pit, *bv()->buffer(), *row) << endl;
 834         }
 835         return fill;
 836 }
 837
 838
 839 // returns the minimum space a manual label needs on the screen in pixel
 840 int LyXText::labelFill(ParagraphList::iterator pit, Row const & row) const
 841 {
 842         pos_type last = pit->beginningOfBody();
 843
 844         Assert(last > 0);
 845
 846         // -1 because a label ends either with a space that is in the label,
 847         // or with the beginning of a footnote that is outside the label.
 848         --last;
 849
 850         // a separator at this end does not count
 851         if (pit->isLineSeparator(last))
 852                 --last;
 853
 854         int w = 0;
 855         pos_type i = row.pos();
 856         while (i <= last) {
 857                 w += singleWidth(pit, i);
 858                 ++i;
 859         }
 860
 861         int fill = 0;
 862         string const & labwidstr = pit->params().labelWidthString();
 863         if (!labwidstr.empty()) {
 864                 LyXFont const labfont = getLabelFont(pit);
 865                 int const labwidth = font_metrics::width(labwidstr, labfont);
 866                 fill = max(labwidth - w, 0);
 867         }
 868
 869         return fill;
 870 }
 871
 872
 873 LColor::color LyXText::backgroundColor() const
 874 {
 875         if (inset_owner)
 876                 return inset_owner->backgroundColor();
 877         else
 878                 return LColor::background;
 879 }
 880
 881
 882 void LyXText::setHeightOfRow(ParagraphList::iterator pit, RowList::iterator rit)
 883 {
 884         // get the maximum ascent and the maximum descent
 885         double layoutasc = 0;
 886         double layoutdesc = 0;
 887         double tmptop = 0;
 888
 889         // ok, let us initialize the maxasc and maxdesc value.
 890         // Only the fontsize count. The other properties
 891         // are taken from the layoutfont. Nicer on the screen :)
 892         LyXLayout_ptr const & layout = pit->layout();
 893
 894         // as max get the first character of this row then it can increase but not
 895         // decrease the height. Just some point to start with so we don't have to
 896         // do the assignment below too often.
 897         LyXFont font = getFont(pit, rit->pos());
 898         LyXFont::FONT_SIZE const tmpsize = font.size();
 899         font = getLayoutFont(pit);
 900         LyXFont::FONT_SIZE const size = font.size();
 901         font.setSize(tmpsize);
 902
 903         LyXFont labelfont = getLabelFont(pit);
 904
 905         double spacing_val = 1.0;
 906         if (!pit->params().spacing().isDefault())
 907                 spacing_val = pit->params().spacing().getValue();
 908         else
 909                 spacing_val = bv()->buffer()->params.spacing.getValue();
 910         //lyxerr << "spacing_val = " << spacing_val << endl;
 911
 912         int maxasc  = int(font_metrics::maxAscent(font) *
 913                           layout->spacing.getValue() * spacing_val);
 914         int maxdesc = int(font_metrics::maxDescent(font) *
 915                           layout->spacing.getValue() * spacing_val);
 916
 917         pos_type const pos_end = lastPos(*pit, rit);
 918         int labeladdon = 0;
 919         int maxwidth = 0;
 920
 921         if (!pit->empty()) {
 922                 // We re-use the font resolution for the entire font span when possible
 923                 LyXFont font = getFont(pit, rit->pos());
 924                 lyx::pos_type endPosOfFontSpan = pit->getEndPosOfFontSpan(rit->pos());
 925
 926                 // Optimisation
 927                 Paragraph const & par = *pit;
 928
 929                 // Check if any insets are larger
 930                 for (pos_type pos = rit->pos(); pos <= pos_end; ++pos) {
 931                         // Manual inlined optimised version of common case of
 932                         // "maxwidth += singleWidth(pit, pos);"
 933                         char const c = par.getChar(pos);
 934
 935                         if (IsPrintable(c)) {
 936                                 if (pos > endPosOfFontSpan) {
 937                                         // We need to get the next font
 938                                         font = getFont(pit, pos);
 939                                         endPosOfFontSpan = par.getEndPosOfFontSpan(pos);
 940                                 }
 941                                 if (! font.language()->RightToLeft()) {
 942                                         maxwidth += font_metrics::width(c, font);
 943                                 } else {
 944                                         // Fall-back to normal case
 945                                         maxwidth += singleWidth(pit, pos, c, font);
 946                                         // And flush font cache
 947                                         endPosOfFontSpan = 0;
 948                                 }
 949                         } else {
 950                                 // Special handling of insets - are any larger?
 951                                 if (par.isInset(pos)) {
 952                                         InsetOld const * tmpinset = par.getInset(pos);
 953                                         if (tmpinset) {
 954                                                 maxwidth += tmpinset->width();
 955                                                 maxasc = max(maxasc, tmpinset->ascent());
 956                                                 maxdesc = max(maxdesc, tmpinset->descent());
 957                                         }
 958                                 } else {
 959                                         // Fall-back to normal case
 960                                         maxwidth += singleWidth(pit, pos, c, font);
 961                                         // And flush font cache
 962                                         endPosOfFontSpan = 0;
 963                                 }
 964                         }
 965                 }
 966         }
 967
 968         // Check if any custom fonts are larger (Asger)
 969         // This is not completely correct, but we can live with the small,
 970         // cosmetic error for now.
 971         LyXFont::FONT_SIZE maxsize =
 972                 pit->highestFontInRange(rit->pos(), pos_end, size);
 973         if (maxsize > font.size()) {
 974                 font.setSize(maxsize);
 975                 maxasc = max(maxasc, font_metrics::maxAscent(font));
 976                 maxdesc = max(maxdesc, font_metrics::maxDescent(font));
 977         }
 978
 979         // This is nicer with box insets:
 980         ++maxasc;
 981         ++maxdesc;
 982
 983         rit->ascent_of_text(maxasc);
 984
 985         // is it a top line?
 986         if (!rit->pos()) {
 987
 988                 // some parksips VERY EASY IMPLEMENTATION
 989                 if (bv()->buffer()->params.paragraph_separation ==
 990                         BufferParams::PARSEP_SKIP)
 991                 {
 992                         if (layout->isParagraph()
 993                                 && pit->getDepth() == 0
 994                                 && pit != ownerParagraphs().begin())
 995                         {
 996                                 maxasc += bv()->buffer()->params.getDefSkip().inPixels(*bv());
 997                         } else if (pit != ownerParagraphs().begin() &&
 998                                    boost::prior(pit)->layout()->isParagraph() &&
 999                                    boost::prior(pit)->getDepth() == 0)
1000                         {
1001                                 // is it right to use defskip here too? (AS)
1002                                 maxasc += bv()->buffer()->params.getDefSkip().inPixels(*bv());
1003                         }
1004                 }
1005
1006                 // the top margin
1007                 if (pit == ownerParagraphs().begin() && !isInInset())
1008                         maxasc += PAPER_MARGIN;
1009
1010                 // add the vertical spaces, that the user added
1011                 maxasc += getLengthMarkerHeight(*bv(), pit->params().spaceTop());
1012
1013                 // do not forget the DTP-lines!
1014                 // there height depends on the font of the nearest character
1015                 if (pit->params().lineTop())
1016
1017                         maxasc += 2 * font_metrics::ascent('x', getFont(pit, 0));
1018                 // and now the pagebreaks
1019                 if (pit->params().pagebreakTop())
1020                         maxasc += 3 * defaultRowHeight();
1021
1022                 if (pit->params().startOfAppendix())
1023                         maxasc += 3 * defaultRowHeight();
1024
1025                 // This is special code for the chapter, since the label of this
1026                 // layout is printed in an extra row
1027                 if (layout->labeltype == LABEL_COUNTER_CHAPTER
1028                         && bv()->buffer()->params.secnumdepth >= 0)
1029                 {
1030                         float spacing_val = 1.0;
1031                         if (!pit->params().spacing().isDefault()) {
1032                                 spacing_val = pit->params().spacing().getValue();
1033                         } else {
1034                                 spacing_val = bv()->buffer()->params.spacing.getValue();
1035                         }
1036
1037                         labeladdon = int(font_metrics::maxDescent(labelfont) *
1038                                          layout->spacing.getValue() *
1039                                          spacing_val)
1040                                 + int(font_metrics::maxAscent(labelfont) *
1041                                       layout->spacing.getValue() *
1042                                       spacing_val);
1043                 }
1044
1045                 // special code for the top label
1046                 if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
1047                      || layout->labeltype == LABEL_BIBLIO
1048                      || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
1049                     && isFirstInSequence(pit, ownerParagraphs())
1050                     && !pit->getLabelstring().empty())
1051                 {
1052                         float spacing_val = 1.0;
1053                         if (!pit->params().spacing().isDefault()) {
1054                                 spacing_val = pit->params().spacing().getValue();
1055                         } else {
1056                                 spacing_val = bv()->buffer()->params.spacing.getValue();
1057                         }
1058
1059                         labeladdon = int(
1060                                 (font_metrics::maxAscent(labelfont) +
1061                                  font_metrics::maxDescent(labelfont)) *
1062                                   layout->spacing.getValue() *
1063                                   spacing_val
1064                                 + layout->topsep * defaultRowHeight()
1065                                 + layout->labelbottomsep * defaultRowHeight());
1066                 }
1067
1068                 // And now the layout spaces, for example before and after
1069                 // a section, or between the items of a itemize or enumerate
1070                 // environment.
1071
1072                 if (!pit->params().pagebreakTop()) {
1073                         ParagraphList::iterator prev =
1074                                 depthHook(pit, ownerParagraphs(),
1075                                           pit->getDepth());
1076                         if (prev != pit && prev->layout() == layout &&
1077                                 prev->getDepth() == pit->getDepth() &&
1078                                 prev->getLabelWidthString() == pit->getLabelWidthString())
1079                         {
1080                                 layoutasc = (layout->itemsep * defaultRowHeight());
1081                         } else if (rit != firstRow()) {
1082                                 tmptop = layout->topsep;
1083
1084                                 //if (boost::prior(pit)->getDepth() >= pit->getDepth())
1085                                 //      tmptop -= getPar(previousRow(rit))->layout()->bottomsep;
1086
1087                                 if (tmptop > 0)
1088                                         layoutasc = (tmptop * defaultRowHeight());
1089                         } else if (pit->params().lineTop()) {
1090                                 tmptop = layout->topsep;
1091
1092                                 if (tmptop > 0)
1093                                         layoutasc = (tmptop * defaultRowHeight());
1094                         }
1095
1096                         prev = outerHook(pit, ownerParagraphs());
1097                         if (prev != ownerParagraphs().end())  {
1098                                 maxasc += int(prev->layout()->parsep * defaultRowHeight());
1099                         } else if (pit != ownerParagraphs().begin()) {
1100                                 ParagraphList::iterator prior_pit = boost::prior(pit);
1101                                 if (prior_pit->getDepth() != 0 ||
1102                                     prior_pit->layout() == layout) {
1103                                         maxasc += int(layout->parsep * defaultRowHeight());
1104                                 }
1105                         }
1106                 }
1107         }
1108
1109         // is it a bottom line?
1110         if (boost::next(rit) == pit->rows.end()) {
1111                 // the bottom margin
1112                 ParagraphList::iterator nextpit = boost::next(pit);
1113                 if (nextpit == ownerParagraphs().end() && !isInInset())
1114                         maxdesc += PAPER_MARGIN;
1115
1116                 // add the vertical spaces, that the user added
1117                 maxdesc += getLengthMarkerHeight(*bv(), pit->params().spaceBottom());
1118
1119                 // do not forget the DTP-lines!
1120                 // there height depends on the font of the nearest character
1121                 if (pit->params().lineBottom())
1122                         maxdesc += 2 * font_metrics::ascent('x',
1123                                         getFont(pit, max(pos_type(0), pit->size() - 1)));
1124
1125                 // and now the pagebreaks
1126                 if (pit->params().pagebreakBottom())
1127                         maxdesc += 3 * defaultRowHeight();
1128
1129                 // and now the layout spaces, for example before and after
1130                 // a section, or between the items of a itemize or enumerate
1131                 // environment
1132                 if (!pit->params().pagebreakBottom()
1133                     && nextpit != ownerParagraphs().end()) {
1134                         ParagraphList::iterator comparepit = pit;
1135                         float usual = 0;
1136                         float unusual = 0;
1137
1138                         if (comparepit->getDepth() > nextpit->getDepth()) {
1139                                 usual = (comparepit->layout()->bottomsep * defaultRowHeight());
1140                                 comparepit = depthHook(comparepit, ownerParagraphs(), nextpit->getDepth());
1141                                 if (comparepit->layout()!= nextpit->layout()
1142                                         || nextpit->getLabelWidthString() !=
1143                                         comparepit->getLabelWidthString())
1144                                 {
1145                                         unusual = (comparepit->layout()->bottomsep * defaultRowHeight());
1146                                 }
1147                                 if (unusual > usual)
1148                                         layoutdesc = unusual;
1149                                 else
1150                                         layoutdesc = usual;
1151                         } else if (comparepit->getDepth() ==  nextpit->getDepth()) {
1152
1153                                 if (comparepit->layout() != nextpit->layout()
1154                                         || nextpit->getLabelWidthString() !=
1155                                         comparepit->getLabelWidthString())
1156                                         layoutdesc = int(comparepit->layout()->bottomsep * defaultRowHeight());
1157                         }
1158                 }
1159         }
1160
1161         // incalculate the layout spaces
1162         maxasc += int(layoutasc * 2 / (2 + pit->getDepth()));
1163         maxdesc += int(layoutdesc * 2 / (2 + pit->getDepth()));
1164
1165         rit->height(maxasc + maxdesc + labeladdon);
1166         rit->baseline(maxasc + labeladdon);
1167         rit->top_of_text(rit->baseline() - font_metrics::maxAscent(font));
1168
1169         double x = 0;
1170         rit->width(int(maxwidth + x));
1171         if (inset_owner) {
1172                 width = max(0, workWidth());
1173                 RowList::iterator rit = firstRow();
1174                 RowList::iterator end = endRow();
1175                 ParagraphList::iterator it = ownerParagraphs().begin();
1176                 while (rit != end) {
1177                         if (rit->width() > width)
1178                                 width = rit->width();
1179                         nextRow(it, rit);
1180                 }
1181         }
1182 }
1183
1184
1185 void LyXText::breakParagraph(ParagraphList & paragraphs, char keep_layout)
1186 {
1187         // allow only if at start or end, or all previous is new text
1188         if (cursor.pos() && cursor.pos() != cursor.par()->size()
1189                 && cursor.par()->isChangeEdited(0, cursor.pos()))
1190                 return;
1191
1192         LyXTextClass const & tclass =
1193                 bv()->buffer()->params.getLyXTextClass();
1194         LyXLayout_ptr const & layout = cursor.par()->layout();
1195
1196         // this is only allowed, if the current paragraph is not empty or caption
1197         // and if it has not the keepempty flag active
1198         if (cursor.par()->empty() && !cursor.par()->allowEmpty()
1199            && layout->labeltype != LABEL_SENSITIVE)
1200                 return;
1201
1202         recordUndo(bv(), Undo::ATOMIC, cursor.par());
1203
1204         // Always break behind a space
1205         //
1206         // It is better to erase the space (Dekel)
1207         if (cursor.pos() < cursor.par()->size()
1208              && cursor.par()->isLineSeparator(cursor.pos()))
1209            cursor.par()->erase(cursor.pos());
1210
1211         // break the paragraph
1212         if (keep_layout)
1213                 keep_layout = 2;
1214         else
1215                 keep_layout = layout->isEnvironment();
1216
1217         // we need to set this before we insert the paragraph. IMO the
1218         // breakParagraph call should return a bool if it inserts the
1219         // paragraph before or behind and we should react on that one
1220         // but we can fix this in 1.3.0 (Jug 20020509)
1221         bool const isempty = (cursor.par()->allowEmpty() && cursor.par()->empty());
1222         ::breakParagraph(bv()->buffer()->params, paragraphs, cursor.par(),
1223                          cursor.pos(), keep_layout);
1224
1225 #warning Trouble Point! (Lgb)
1226         // When ::breakParagraph is called from within an inset we must
1227         // ensure that the correct ParagraphList is used. Today that is not
1228         // the case and the Buffer::paragraphs is used. Not good. (Lgb)
1229         ParagraphList::iterator next_par = boost::next(cursor.par());
1230
1231         // well this is the caption hack since one caption is really enough
1232         if (layout->labeltype == LABEL_SENSITIVE) {
1233                 if (!cursor.pos())
1234                         // set to standard-layout
1235                         cursor.par()->applyLayout(tclass.defaultLayout());
1236                 else
1237                         // set to standard-layout
1238                         next_par->applyLayout(tclass.defaultLayout());
1239         }
1240
1241         // if the cursor is at the beginning of a row without prior newline,
1242         // move one row up!
1243         // This touches only the screen-update. Otherwise we would may have
1244         // an empty row on the screen
1245         if (cursor.pos() && cursorRow()->pos() == cursor.pos()
1246             && !cursor.par()->isNewline(cursor.pos() - 1))
1247         {
1248                 cursorLeft(bv());
1249         }
1250
1251         while (!next_par->empty() && next_par->isNewline(0))
1252                 next_par->erase(0);
1253
1254         updateCounters();
1255         redoParagraph(cursor.par());
1256         redoParagraph(next_par);
1257
1258         // This check is necessary. Otherwise the new empty paragraph will
1259         // be deleted automatically. And it is more friendly for the user!
1260         if (cursor.pos() || isempty)
1261                 setCursor(next_par, 0);
1262         else
1263                 setCursor(cursor.par(), 0);
1264 }
1265
1266
1267 // convenience function
1268 void LyXText::redoParagraph()
1269 {
1270         clearSelection();
1271         redoParagraph(cursor.par());
1272         setCursorIntern(cursor.par(), cursor.pos());
1273 }
1274
1275
1276 // insert a character, moves all the following breaks in the
1277 // same Paragraph one to the right and make a rebreak
1278 void LyXText::insertChar(char c)
1279 {
1280         recordUndo(bv(), Undo::INSERT, cursor.par());
1281
1282         // When the free-spacing option is set for the current layout,
1283         // disable the double-space checking
1284
1285         bool const freeSpacing = cursor.par()->layout()->free_spacing ||
1286                 cursor.par()->isFreeSpacing();
1287
1288         if (lyxrc.auto_number) {
1289                 static string const number_operators = "+-/*";
1290                 static string const number_unary_operators = "+-";
1291                 static string const number_seperators = ".,:";
1292
1293                 if (current_font.number() == LyXFont::ON) {
1294                         if (!IsDigit(c) && !contains(number_operators, c) &&
1295                             !(contains(number_seperators, c) &&
1296                               cursor.pos() >= 1 &&
1297                               cursor.pos() < cursor.par()->size() &&
1298                               getFont(cursor.par(), cursor.pos()).number() == LyXFont::ON &&
1299                               getFont(cursor.par(), cursor.pos() - 1).number() == LyXFont::ON)
1300                            )
1301                                 number(bv()); // Set current_font.number to OFF
1302                 } else if (IsDigit(c) &&
1303                            real_current_font.isVisibleRightToLeft()) {
1304                         number(bv()); // Set current_font.number to ON
1305
1306                         if (cursor.pos() > 0) {
1307                                 char const c = cursor.par()->getChar(cursor.pos() - 1);
1308                                 if (contains(number_unary_operators, c) &&
1309                                     (cursor.pos() == 1 ||
1310                                      cursor.par()->isSeparator(cursor.pos() - 2) ||
1311                                      cursor.par()->isNewline(cursor.pos() - 2))
1312                                   ) {
1313                                         setCharFont(
1314                                                     cursor.par(),
1315                                                     cursor.pos() - 1,
1316                                                     current_font);
1317                                 } else if (contains(number_seperators, c) &&
1318                                            cursor.pos() >= 2 &&
1319                                            getFont(
1320                                                    cursor.par(),
1321                                                    cursor.pos() - 2).number() == LyXFont::ON) {
1322                                         setCharFont(
1323                                                     cursor.par(),
1324                                                     cursor.pos() - 1,
1325                                                     current_font);
1326                                 }
1327                         }
1328                 }
1329         }
1330
1331
1332         // First check, if there will be two blanks together or a blank at
1333         // the beginning of a paragraph.
1334         // I decided to handle blanks like normal characters, the main
1335         // difference are the special checks when calculating the row.fill
1336         // (blank does not count at the end of a row) and the check here
1337
1338         // The bug is triggered when we type in a description environment:
1339         // The current_font is not changed when we go from label to main text
1340         // and it should (along with realtmpfont) when we type the space.
1341         // CHECK There is a bug here! (Asger)
1342
1343         // store the current font.  This is because of the use of cursor
1344         // movements. The moving cursor would refresh the current font
1345         LyXFont realtmpfont = real_current_font;
1346         LyXFont rawtmpfont = current_font;
1347
1348         if (!freeSpacing && IsLineSeparatorChar(c)) {
1349                 if ((cursor.pos() > 0
1350                      && cursor.par()->isLineSeparator(cursor.pos() - 1))
1351                     || (cursor.pos() > 0
1352                         && cursor.par()->isNewline(cursor.pos() - 1))
1353                     || (cursor.pos() == 0)) {
1354                         static bool sent_space_message = false;
1355                         if (!sent_space_message) {
1356                                 if (cursor.pos() == 0)
1357                                         bv()->owner()->message(_("You cannot insert a space at the beginning of a paragraph. Please read the Tutorial."));
1358                                 else
1359                                         bv()->owner()->message(_("You cannot type two spaces this way. Please read the Tutorial."));
1360                                 sent_space_message = true;
1361                         }
1362                         charInserted();
1363                         return;
1364                 }
1365         }
1366
1367         // Here case LyXText::InsertInset already inserted the character
1368         if (c != Paragraph::META_INSET)
1369                 cursor.par()->insertChar(cursor.pos(), c);
1370
1371         setCharFont(cursor.par(), cursor.pos(), rawtmpfont);
1372
1373         current_font = rawtmpfont;
1374         real_current_font = realtmpfont;
1375         redoParagraph(cursor.par());
1376         setCursor(cursor.par(), cursor.pos() + 1, false, cursor.boundary());
1377
1378         charInserted();
1379 }
1380
1381
1382 void LyXText::charInserted()
1383 {
1384         // Here we could call finishUndo for every 20 characters inserted.
1385         // This is from my experience how emacs does it. (Lgb)
1386         static unsigned int counter;
1387         if (counter < 20) {
1388                 ++counter;
1389         } else {
1390                 finishUndo();
1391                 counter = 0;
1392         }
1393 }
1394
1395
1396 void LyXText::prepareToPrint(ParagraphList::iterator pit,
1397            RowList::iterator const rit) const
1398 {
1399         double w = rit->fill();
1400         double fill_hfill = 0;
1401         double fill_label_hfill = 0;
1402         double fill_separator = 0;
1403         double x = 0;
1404
1405         bool const is_rtl =
1406                 pit->isRightToLeftPar(bv()->buffer()->params);
1407         if (is_rtl)
1408                 x = workWidth() > 0 ? rightMargin(pit, *bv()->buffer(), *rit) : 0;
1409         else
1410                 x = workWidth() > 0 ? leftMargin(pit, *rit) : 0;
1411
1412         // is there a manual margin with a manual label
1413         LyXLayout_ptr const & layout = pit->layout();
1414
1415         if (layout->margintype == MARGIN_MANUAL
1416             && layout->labeltype == LABEL_MANUAL) {
1417                 /// We might have real hfills in the label part
1418                 int nlh = numberOfLabelHfills(*pit, rit);
1419
1420                 // A manual label par (e.g. List) has an auto-hfill
1421                 // between the label text and the body of the
1422                 // paragraph too.
1423                 // But we don't want to do this auto hfill if the par
1424                 // is empty.
1425                 if (!pit->empty())
1426                         ++nlh;
1427
1428                 if (nlh && !pit->getLabelWidthString().empty()) {
1429                         fill_label_hfill = labelFill(pit, *rit) / double(nlh);
1430                 }
1431         }
1432
1433         // are there any hfills in the row?
1434         int const nh = numberOfHfills(*pit, rit);
1435
1436         if (nh) {
1437                 if (w > 0)
1438                         fill_hfill = w / nh;
1439         // we don't have to look at the alignment if it is ALIGN_LEFT and
1440         // if the row is already larger then the permitted width as then
1441         // we force the LEFT_ALIGN'edness!
1442         } else if (int(rit->width()) < workWidth()) {
1443                 // is it block, flushleft or flushright?
1444                 // set x how you need it
1445                 int align;
1446                 if (pit->params().align() == LYX_ALIGN_LAYOUT) {
1447                         align = layout->align;
1448                 } else {
1449                         align = pit->params().align();
1450                 }
1451                 InsetOld * inset = 0;
1452                 // ERT insets should always be LEFT ALIGNED on screen
1453                 inset = pit->inInset();
1454                 if (inset && inset->owner() &&
1455                         inset->owner()->lyxCode() == InsetOld::ERT_CODE)
1456                 {
1457                         align = LYX_ALIGN_LEFT;
1458                 }
1459
1460                 switch (align) {
1461             case LYX_ALIGN_BLOCK:
1462                 {
1463                         int const ns = numberOfSeparators(*pit, rit);
1464                         RowList::iterator next_row = boost::next(rit);
1465                         if (ns
1466                                 && next_row != pit->rows.end()
1467                                 && !pit->isNewline(next_row->pos() - 1)
1468                                 ) {
1469                                         fill_separator = w / ns;
1470                         } else if (is_rtl) {
1471                                 x += w;
1472                         }
1473                         break;
1474             }
1475             case LYX_ALIGN_RIGHT:
1476                         x += w;
1477                         break;
1478             case LYX_ALIGN_CENTER:
1479                         x += w / 2;
1480                         break;
1481                 }
1482         }
1483
1484         computeBidiTables(pit, *bv()->buffer(), rit);
1485         if (is_rtl) {
1486                 pos_type body_pos = pit->beginningOfBody();
1487                 pos_type last = lastPos(*pit, rit);
1488
1489                 if (body_pos > 0 &&
1490                                 (body_pos - 1 > last ||
1491                                  !pit->isLineSeparator(body_pos - 1))) {
1492                         x += font_metrics::width(layout->labelsep, getLabelFont(pit));
1493                         if (body_pos - 1 <= last)
1494                                 x += fill_label_hfill;
1495                 }
1496         }
1497
1498         rit->fill_hfill(fill_hfill);
1499         rit->fill_label_hfill(fill_label_hfill);
1500         rit->fill_separator(fill_separator);
1501         rit->x(x);
1502 }
1503
1504
1505 // important for the screen
1506
1507
1508 // the cursor set functions have a special mechanism. When they
1509 // realize, that you left an empty paragraph, they will delete it.
1510 // They also delete the corresponding row
1511
1512 void LyXText::cursorRightOneWord()
1513 {
1514         ::cursorRightOneWord(cursor, ownerParagraphs());
1515         setCursor(cursor.par(), cursor.pos());
1516 }
1517
1518
1519 // Skip initial whitespace at end of word and move cursor to *start*
1520 // of prior word, not to end of next prior word.
1521 void LyXText::cursorLeftOneWord()
1522 {
1523         LyXCursor tmpcursor = cursor;
1524         ::cursorLeftOneWord(tmpcursor, ownerParagraphs());
1525         setCursor(tmpcursor.par(), tmpcursor.pos());
1526 }
1527
1528
1529 void LyXText::selectWord(word_location loc)
1530 {
1531         LyXCursor from = cursor;
1532         LyXCursor to;
1533         ::getWord(from, to, loc, ownerParagraphs());
1534         if (cursor != from)
1535                 setCursor(from.par(), from.pos());
1536         if (to == from)
1537                 return;
1538         selection.cursor = cursor;
1539         setCursor(to.par(), to.pos());
1540         setSelection();
1541 }
1542
1543
1544 // Select the word currently under the cursor when no
1545 // selection is currently set
1546 bool LyXText::selectWordWhenUnderCursor(word_location loc)
1547 {
1548         if (!selection.set()) {
1549                 selectWord(loc);
1550                 return selection.set();
1551         }
1552         return false;
1553 }
1554
1555
1556 void LyXText::acceptChange()
1557 {
1558         if (!selection.set() && cursor.par()->size())
1559                 return;
1560
1561         if (selection.start.par() == selection.end.par()) {
1562                 LyXCursor & startc = selection.start;
1563                 LyXCursor & endc = selection.end;
1564                 recordUndo(bv(), Undo::INSERT, startc.par());
1565                 startc.par()->acceptChange(startc.pos(), endc.pos());
1566                 finishUndo();
1567                 clearSelection();
1568                 redoParagraph(startc.par());
1569                 setCursorIntern(startc.par(), 0);
1570         }
1571 #warning handle multi par selection
1572 }
1573
1574
1575 void LyXText::rejectChange()
1576 {
1577         if (!selection.set() && cursor.par()->size())
1578                 return;
1579
1580         if (selection.start.par() == selection.end.par()) {
1581                 LyXCursor & startc = selection.start;
1582                 LyXCursor & endc = selection.end;
1583                 recordUndo(bv(), Undo::INSERT, startc.par());
1584                 startc.par()->rejectChange(startc.pos(), endc.pos());
1585                 finishUndo();
1586                 clearSelection();
1587                 redoParagraph(startc.par());
1588                 setCursorIntern(startc.par(), 0);
1589         }
1590 #warning handle multi par selection
1591 }
1592
1593
1594 // This function is only used by the spellchecker for NextWord().
1595 // It doesn't handle LYX_ACCENTs and probably never will.
1596 WordLangTuple const
1597 LyXText::selectNextWordToSpellcheck(float & value)
1598 {
1599         if (the_locking_inset) {
1600                 WordLangTuple word = the_locking_inset->selectNextWordToSpellcheck(bv(), value);
1601                 if (!word.word().empty()) {
1602                         value += float(cursor.y());
1603                         value /= float(height);
1604                         return word;
1605                 }
1606                 // we have to go on checking so move cursor to the next char
1607                 if (cursor.pos() == cursor.par()->size()) {
1608                         if (boost::next(cursor.par()) == ownerParagraphs().end())
1609                                 return word;
1610                         cursor.par(boost::next(cursor.par()));
1611                         cursor.pos(0);
1612                 } else
1613                         cursor.pos(cursor.pos() + 1);
1614         }
1615         ParagraphList::iterator tmppit = cursor.par();
1616
1617         // If this is not the very first word, skip rest of
1618         // current word because we are probably in the middle
1619         // of a word if there is text here.
1620         if (cursor.pos() || cursor.par() != ownerParagraphs().begin()) {
1621                 while (cursor.pos() < cursor.par()->size()
1622                        && cursor.par()->isLetter(cursor.pos()))
1623                         cursor.pos(cursor.pos() + 1);
1624         }
1625
1626         // Now, skip until we have real text (will jump paragraphs)
1627         while (true) {
1628                 ParagraphList::iterator cpit = cursor.par();
1629                 pos_type const cpos(cursor.pos());
1630
1631                 if (cpos == cpit->size()) {
1632                         if (boost::next(cpit) != ownerParagraphs().end()) {
1633                                 cursor.par(boost::next(cpit));
1634                                 cursor.pos(0);
1635                                 continue;
1636                         }
1637                         break;
1638                 }
1639
1640                 bool const is_good_inset = cpit->isInset(cpos)
1641                         && cpit->getInset(cpos)->allowSpellcheck();
1642
1643                 if (!isDeletedText(*cpit, cpos)
1644                     && (is_good_inset || cpit->isLetter(cpos)))
1645                         break;
1646
1647                 cursor.pos(cpos + 1);
1648         }
1649
1650         // now check if we hit an inset so it has to be a inset containing text!
1651         if (cursor.pos() < cursor.par()->size() &&
1652             cursor.par()->isInset(cursor.pos())) {
1653                 // lock the inset!
1654                 FuncRequest cmd(bv(), LFUN_INSET_EDIT, "left");
1655                 cursor.par()->getInset(cursor.pos())->localDispatch(cmd);
1656                 // now call us again to do the above trick
1657                 // but obviously we have to start from down below ;)
1658                 return bv()->text->selectNextWordToSpellcheck(value);
1659         }
1660
1661         // Update the value if we changed paragraphs
1662         if (cursor.par() != tmppit) {
1663                 setCursor(cursor.par(), cursor.pos());
1664                 value = float(cursor.y())/float(height);
1665         }
1666
1667         // Start the selection from here
1668         selection.cursor = cursor;
1669
1670         string lang_code = getFont(cursor.par(), cursor.pos()).language()->code();
1671         // and find the end of the word (insets like optional hyphens
1672         // and ligature break are part of a word)
1673         while (cursor.pos() < cursor.par()->size()
1674                && cursor.par()->isLetter(cursor.pos())
1675                && !isDeletedText(*cursor.par(), cursor.pos()))
1676                 cursor.pos(cursor.pos() + 1);
1677
1678         // Finally, we copy the word to a string and return it
1679         string str;
1680         if (selection.cursor.pos() < cursor.pos()) {
1681                 pos_type i;
1682                 for (i = selection.cursor.pos(); i < cursor.pos(); ++i) {
1683                         if (!cursor.par()->isInset(i))
1684                                 str += cursor.par()->getChar(i);
1685                 }
1686         }
1687         return WordLangTuple(str, lang_code);
1688 }
1689
1690
1691 // This one is also only for the spellchecker
1692 void LyXText::selectSelectedWord()
1693 {
1694         if (the_locking_inset) {
1695                 the_locking_inset->selectSelectedWord(bv());
1696                 return;
1697         }
1698         // move cursor to the beginning
1699         setCursor(selection.cursor.par(), selection.cursor.pos());
1700
1701         // set the sel cursor
1702         selection.cursor = cursor;
1703
1704         // now find the end of the word
1705         while (cursor.pos() < cursor.par()->size()
1706                && cursor.par()->isLetter(cursor.pos()))
1707                 cursor.pos(cursor.pos() + 1);
1708
1709         setCursor(cursor.par(), cursor.pos());
1710
1711         // finally set the selection
1712         setSelection();
1713 }
1714
1715
1716 // Delete from cursor up to the end of the current or next word.
1717 void LyXText::deleteWordForward()
1718 {
1719         if (cursor.par()->empty())
1720                 cursorRight(bv());
1721         else {
1722                 LyXCursor tmpcursor = cursor;
1723                 selection.set(true); // to avoid deletion
1724                 cursorRightOneWord();
1725                 setCursor(tmpcursor, tmpcursor.par(), tmpcursor.pos());
1726                 selection.cursor = cursor;
1727                 cursor = tmpcursor;
1728                 setSelection();
1729
1730                 // Great, CutSelection() gets rid of multiple spaces.
1731                 cutSelection(true, false);
1732         }
1733 }
1734
1735
1736 // Delete from cursor to start of current or prior word.
1737 void LyXText::deleteWordBackward()
1738 {
1739         if (cursor.par()->empty())
1740                 cursorLeft(bv());
1741         else {
1742                 LyXCursor tmpcursor = cursor;
1743                 selection.set(true); // to avoid deletion
1744                 cursorLeftOneWord();
1745                 setCursor(tmpcursor, tmpcursor.par(), tmpcursor.pos());
1746                 selection.cursor = cursor;
1747                 cursor = tmpcursor;
1748                 setSelection();
1749                 cutSelection(true, false);
1750         }
1751 }
1752
1753
1754 // Kill to end of line.
1755 void LyXText::deleteLineForward()
1756 {
1757         if (cursor.par()->empty())
1758                 // Paragraph is empty, so we just go to the right
1759                 cursorRight(bv());
1760         else {
1761                 LyXCursor tmpcursor = cursor;
1762                 // We can't store the row over a regular setCursor
1763                 // so we set it to 0 and reset it afterwards.
1764                 selection.set(true); // to avoid deletion
1765                 cursorEnd();
1766                 setCursor(tmpcursor, tmpcursor.par(), tmpcursor.pos());
1767                 selection.cursor = cursor;
1768                 cursor = tmpcursor;
1769                 setSelection();
1770                 // What is this test for ??? (JMarc)
1771                 if (!selection.set()) {
1772                         deleteWordForward();
1773                 } else {
1774                         cutSelection(true, false);
1775                 }
1776         }
1777 }
1778
1779
1780 void LyXText::changeCase(LyXText::TextCase action)
1781 {
1782         LyXCursor from;
1783         LyXCursor to;
1784
1785         if (selection.set()) {
1786                 from = selection.start;
1787                 to = selection.end;
1788         } else {
1789                 from = cursor;
1790                 ::getWord(from, to, lyx::PARTIAL_WORD, ownerParagraphs());
1791                 setCursor(to.par(), to.pos() + 1);
1792         }
1793
1794         recordUndo(bv(), Undo::ATOMIC, from.par(), to.par());
1795
1796         pos_type pos = from.pos();
1797         ParagraphList::iterator pit = from.par();
1798
1799         while (pit != ownerParagraphs().end() &&
1800                (pos != to.pos() || pit != to.par())) {
1801                 if (pos == pit->size()) {
1802                         ++pit;
1803                         pos = 0;
1804                         continue;
1805                 }
1806                 unsigned char c = pit->getChar(pos);
1807                 if (!IsInsetChar(c)) {
1808                         switch (action) {
1809                         case text_lowercase:
1810                                 c = lowercase(c);
1811                                 break;
1812                         case text_capitalization:
1813                                 c = uppercase(c);
1814                                 action = text_lowercase;
1815                                 break;
1816                         case text_uppercase:
1817                                 c = uppercase(c);
1818                                 break;
1819                         }
1820                 }
1821 #warning changes
1822                 pit->setChar(pos, c);
1823                 ++pos;
1824         }
1825 }
1826
1827
1828 void LyXText::Delete()
1829 {
1830         // this is a very easy implementation
1831
1832         LyXCursor old_cursor = cursor;
1833         int const old_cur_par_id = old_cursor.par()->id();
1834         int const old_cur_par_prev_id =
1835                 (old_cursor.par() != ownerParagraphs().begin() ?
1836                  boost::prior(old_cursor.par())->id() : -1);
1837
1838         // just move to the right
1839         cursorRight(bv());
1840
1841         // CHECK Look at the comment here.
1842         // This check is not very good...
1843         // The cursorRightIntern calls DeleteEmptyParagrapgMechanism
1844         // and that can very well delete the par or par->previous in
1845         // old_cursor. Will a solution where we compare paragraph id's
1846         //work better?
1847         if ((cursor.par() != ownerParagraphs().begin() ? boost::prior(cursor.par())->id() : -1)
1848             == old_cur_par_prev_id
1849             && cursor.par()->id() != old_cur_par_id) {
1850                 // delete-empty-paragraph-mechanism has done it
1851                 return;
1852         }
1853
1854         // if you had success make a backspace
1855         if (old_cursor.par() != cursor.par() || old_cursor.pos() != cursor.pos()) {
1856                 LyXCursor tmpcursor = cursor;
1857                 // to make sure undo gets the right cursor position
1858                 cursor = old_cursor;
1859                 recordUndo(bv(), Undo::DELETE, cursor.par());
1860                 cursor = tmpcursor;
1861                 backspace();
1862         }
1863 }
1864
1865
1866 void LyXText::backspace()
1867 {
1868         // Get the font that is used to calculate the baselineskip
1869         pos_type lastpos = cursor.par()->size();
1870
1871         if (cursor.pos() == 0) {
1872                 // The cursor is at the beginning of a paragraph,
1873                 // so the the backspace will collapse two paragraphs into one.
1874
1875                 // but it's not allowed unless it's new
1876                 if (cursor.par()->isChangeEdited(0, cursor.par()->size()))
1877                         return;
1878
1879                 // we may paste some paragraphs
1880
1881                 // is it an empty paragraph?
1882
1883                 if (lastpos == 0
1884                      || (lastpos == 1 && cursor.par()->isSeparator(0))) {
1885                         // This is an empty paragraph and we delete it just
1886                         // by moving the cursor one step
1887                         // left and let the DeleteEmptyParagraphMechanism
1888                         // handle the actual deletion of the paragraph.
1889
1890                         if (cursor.par() != ownerParagraphs().begin()) {
1891                                 ParagraphList::iterator tmppit = boost::prior(cursor.par());
1892                                 if (cursor.par()->layout() == tmppit->layout()
1893                                     && cursor.par()->getAlign() == tmppit->getAlign()) {
1894                                         // Inherit bottom DTD from the paragraph below.
1895                                         // (the one we are deleting)
1896                                         tmppit->params().lineBottom(cursor.par()->params().lineBottom());
1897                                         tmppit->params().spaceBottom(cursor.par()->params().spaceBottom());
1898                                         tmppit->params().pagebreakBottom(cursor.par()->params().pagebreakBottom());
1899                                 }
1900
1901                                 cursorLeft(bv());
1902
1903                                 // the layout things can change the height of a row !
1904                                 redoParagraph();
1905                                 return;
1906                         }
1907                 }
1908
1909                 if (cursor.par() != ownerParagraphs().begin()) {
1910                         recordUndo(bv(), Undo::DELETE,
1911                                 boost::prior(cursor.par()),
1912                                 cursor.par());
1913                 }
1914
1915                 ParagraphList::iterator tmppit = cursor.par();
1916                 // We used to do cursorLeftIntern() here, but it is
1917                 // not a good idea since it triggers the auto-delete
1918                 // mechanism. So we do a cursorLeftIntern()-lite,
1919                 // without the dreaded mechanism. (JMarc)
1920                 if (cursor.par() != ownerParagraphs().begin()) {
1921                         // steps into the above paragraph.
1922                         setCursorIntern(boost::prior(cursor.par()),
1923                                         boost::prior(cursor.par())->size(),
1924                                         false);
1925                 }
1926
1927                 // Pasting is not allowed, if the paragraphs have different
1928                 // layout. I think it is a real bug of all other
1929                 // word processors to allow it. It confuses the user.
1930                 // Correction: Pasting is always allowed with standard-layout
1931                 LyXTextClass const & tclass =
1932                         bv()->buffer()->params.getLyXTextClass();
1933
1934                 if (cursor.par() != tmppit
1935                     && (cursor.par()->layout() == tmppit->layout()
1936                         || tmppit->layout() == tclass.defaultLayout())
1937                     && cursor.par()->getAlign() == tmppit->getAlign()) {
1938                         mergeParagraph(bv()->buffer()->params,
1939                                 bv()->buffer()->paragraphs, cursor.par());
1940
1941                         if (cursor.pos() && cursor.par()->isSeparator(cursor.pos() - 1))
1942                                 cursor.pos(cursor.pos() - 1);
1943
1944                         // the row may have changed, block, hfills etc.
1945                         updateCounters();
1946                         setCursor(cursor.par(), cursor.pos(), false);
1947                 }
1948         } else {
1949                 // this is the code for a normal backspace, not pasting
1950                 // any paragraphs
1951                 recordUndo(bv(), Undo::DELETE, cursor.par());
1952                 // We used to do cursorLeftIntern() here, but it is
1953                 // not a good idea since it triggers the auto-delete
1954                 // mechanism. So we do a cursorLeftIntern()-lite,
1955                 // without the dreaded mechanism. (JMarc)
1956                 setCursorIntern(cursor.par(), cursor.pos() - 1,
1957                                 false, cursor.boundary());
1958                 cursor.par()->erase(cursor.pos());
1959         }
1960
1961         lastpos = cursor.par()->size();
1962         if (cursor.pos() == lastpos)
1963                 setCurrentFont();
1964
1965         redoParagraph();
1966         setCursor(cursor.par(), cursor.pos(), false, !cursor.boundary());
1967 }
1968
1969
1970 RowList::iterator LyXText::cursorRow() const
1971 {
1972         return getRow(cursor.par(), cursor.pos());
1973 }
1974
1975
1976 RowList::iterator LyXText::getRow(LyXCursor const & cur) const
1977 {
1978         return getRow(cur.par(), cur.pos());
1979 }
1980
1981
1982 RowList::iterator
1983 LyXText::getRow(ParagraphList::iterator pit, pos_type pos) const
1984 {
1985         RowList::iterator rit = boost::prior(pit->rows.end());
1986         RowList::iterator const begin = pit->rows.begin();
1987
1988         while (rit != begin && rit->pos() > pos)
1989                 --rit;
1990
1991         return rit;
1992 }
1993
1994
1995 // returns pointer to some fancy row 'below' specified row
1996 RowList::iterator LyXText::cursorIRow() const
1997 {
1998         return getRow(cursor.par(), cursor.pos());
1999 }
2000
2001
2002 RowList::iterator LyXText::getRowNearY(int y,
2003         ParagraphList::iterator & pit) const
2004 {
2005         //lyxerr << "getRowNearY: y " << y << endl;
2006
2007         pit = boost::prior(ownerParagraphs().end());
2008
2009         RowList::iterator rit = lastRow();
2010         RowList::iterator rbegin = firstRow();
2011
2012         while (rit != rbegin && static_cast<int>(rit->y()) > y)
2013                 previousRow(pit, rit);
2014
2015         return rit;
2016 }
2017
2018
2019 int LyXText::getDepth() const
2020 {
2021         return cursor.par()->getDepth();
2022 }
2023
2024
2025 RowList::iterator LyXText::firstRow() const
2026 {
2027         return ownerParagraphs().front().rows.begin();
2028 }
2029
2030
2031 RowList::iterator LyXText::lastRow() const
2032 {
2033         return boost::prior(endRow());
2034 }
2035
2036
2037 RowList::iterator LyXText::endRow() const
2038 {
2039         return ownerParagraphs().back().rows.end();
2040 }
2041
2042
2043 void LyXText::nextRow(ParagraphList::iterator & pit,
2044         RowList::iterator & rit) const
2045 {
2046         ++rit;
2047         if (rit == pit->rows.end()) {
2048                 ++pit;
2049                 if (pit == ownerParagraphs().end())
2050                         --pit;
2051                 else
2052                         rit = pit->rows.begin();
2053         }
2054 }
2055
2056
2057 void LyXText::previousRow(ParagraphList::iterator & pit,
2058         RowList::iterator & rit) const
2059 {
2060         if (rit != pit->rows.begin())
2061                 --rit;
2062         else {
2063                 Assert(pit != ownerParagraphs().begin());
2064                 --pit;
2065                 rit = boost::prior(pit->rows.end());
2066         }
2067 }
2068
2069
2070 bool LyXText::noRows() const
2071 {
2072         return ownerParagraphs().begin()->rows.empty();
2073 }