src/text.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *           Copyright 1995 Matthias Ettrich
   7  *           Copyright 1995-2001 The LyX Team.
   8  *
   9  * ====================================================== */
  10
  11 #include <config.h>
  12
  13 #include "lyxtext.h"
  14 #include "paragraph.h"
  15 #include "gettext.h"
  16 #include "bufferparams.h"
  17 #include "buffer.h"
  18 #include "debug.h"
  19 #include "intl.h"
  20 #include "lyxrc.h"
  21 #include "encoding.h"
  22 #include "frontends/LyXView.h"
  23 #include "frontends/Painter.h"
  24 #include "frontends/font_metrics.h"
  25 #include "frontends/screen.h"
  26 #include "frontends/WorkArea.h"
  27 #include "bufferview_funcs.h"
  28 #include "BufferView.h"
  29 #include "language.h"
  30 #include "ParagraphParameters.h"
  31 #include "undo_funcs.h"
  32 #include "text_funcs.h"
  33 #include "WordLangTuple.h"
  34 #include "paragraph_funcs.h"
  35 #include "rowpainter.h"
  36 #include "lyxrow_funcs.h"
  37 #include "metricsinfo.h"
  38
  39 #include "insets/insettext.h"
  40
  41 #include "support/textutils.h"
  42 #include "support/LAssert.h"
  43 #include "support/lstrings.h"
  44
  45 #include <algorithm>
  46
  47 using namespace lyx::support;
  48
  49 using std::max;
  50 using std::min;
  51 using std::endl;
  52 using std::pair;
  53
  54 using lyx::pos_type;
  55 using lyx::word_location;
  56
  57 using namespace bv_funcs;
  58
  59 /// top, right, bottom pixel margin
  60 extern int const PAPER_MARGIN = 20;
  61 /// margin for changebar
  62 extern int const CHANGEBAR_MARGIN = 10;
  63 /// left margin
  64 extern int const LEFT_MARGIN = PAPER_MARGIN + CHANGEBAR_MARGIN;
  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 (int y = 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(y);
  92                         y += rit->height();
  93                 }
  94         }
  95 }
  96
  97
  98 int LyXText::top_y() const
  99 {
 100         return anchor_y_;
 101 }
 102
 103
 104 void LyXText::top_y(int newy)
 105 {
 106         anchor_y_ = newy;
 107         lyxerr[Debug::GUI] << "changing reference to offset: " << anchor_y_ << endl;
 108 }
 109
 110
 111 int LyXText::workWidth() const
 112 {
 113         return inset_owner ? inset_owner->textWidth() : bv()->workWidth();
 114 }
 115
 116
 117 int LyXText::getRealCursorX() const
 118 {
 119         int x = cursor.x();
 120         if (the_locking_inset && (the_locking_inset->getLyXText(bv())!= this))
 121                 x = the_locking_inset->getLyXText(bv())->getRealCursorX();
 122         return x;
 123 }
 124
 125
 126 #warning FIXME  This function seems to belong outside of LyxText.
 127 unsigned char LyXText::transformChar(unsigned char c, Paragraph const & par,
 128                                      pos_type pos) const
 129 {
 130         if (!Encodings::is_arabic(c))
 131                 if (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 && IsDigit(c))
 132                         return c + (0xb0 - '0');
 133                 else
 134                         return c;
 135
 136         unsigned char const prev_char = pos > 0 ? par.getChar(pos - 1) : ' ';
 137         unsigned char next_char = ' ';
 138
 139         pos_type const par_size = par.size();
 140
 141         for (pos_type i = pos + 1; i < par_size; ++i) {
 142                 unsigned char const par_char = par.getChar(i);
 143                 if (!Encodings::IsComposeChar_arabic(par_char)) {
 144                         next_char = par_char;
 145                         break;
 146                 }
 147         }
 148
 149         if (Encodings::is_arabic(next_char)) {
 150                 if (Encodings::is_arabic(prev_char) &&
 151                         !Encodings::is_arabic_special(prev_char))
 152                         return Encodings::TransformChar(c, Encodings::FORM_MEDIAL);
 153                 else
 154                         return Encodings::TransformChar(c, Encodings::FORM_INITIAL);
 155         } else {
 156                 if (Encodings::is_arabic(prev_char) &&
 157                         !Encodings::is_arabic_special(prev_char))
 158                         return Encodings::TransformChar(c, Encodings::FORM_FINAL);
 159                 else
 160                         return Encodings::TransformChar(c, Encodings::FORM_ISOLATED);
 161         }
 162 }
 163
 164 // This is the comments that some of the warnings below refers to.
 165 // There are some issues in this file and I don't think they are
 166 // really related to the FIX_DOUBLE_SPACE patch. I'd rather think that
 167 // this is a problem that has been here almost from day one and that a
 168 // larger userbase with differenct access patters triggers the bad
 169 // behaviour. (segfaults.) What I think happen is: In several places
 170 // we store the paragraph in the current cursor and then moves the
 171 // cursor. This movement of the cursor will delete paragraph at the
 172 // old position if it is now empty. This will make the temporary
 173 // pointer to the old cursor paragraph invalid and dangerous to use.
 174 // And is some cases this will trigger a segfault. I have marked some
 175 // of the cases where this happens with a warning, but I am sure there
 176 // are others in this file and in text2.C. There is also a note in
 177 // Delete() that you should read. In Delete I store the paragraph->id
 178 // instead of a pointer to the paragraph. I am pretty sure this faulty
 179 // use of temporary pointers to paragraphs that might have gotten
 180 // invalidated (through a cursor movement) before they are used, are
 181 // the cause of the strange crashes we get reported often.
 182 //
 183 // It is very tiresom to change this code, especially when it is as
 184 // hard to read as it is. Help to fix all the cases where this is done
 185 // would be greately appreciated.
 186 //
 187 // Lgb
 188
 189 int LyXText::singleWidth(ParagraphList::iterator pit, pos_type pos) const
 190 {
 191         if (pos >= pit->size())
 192                 return 0;
 193
 194         char const c = pit->getChar(pos);
 195         LyXFont const & font = getFont(pit, pos);
 196         return singleWidth(pit, pos, c, font);
 197 }
 198
 199
 200 int LyXText::singleWidth(ParagraphList::iterator pit,
 201                          pos_type pos, char c, LyXFont const & font) const
 202 {
 203         if (pos >= pit->size()) {
 204                 lyxerr << "in singleWidth(), pos: " << pos << endl;
 205                 Assert(false);
 206                 return 0;
 207         }
 208
 209
 210         // The most common case is handled first (Asger)
 211         if (IsPrintable(c)) {
 212                 if (font.language()->RightToLeft()) {
 213                         if ((lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 214                              lyxrc.font_norm_type == LyXRC::ISO_10646_1)
 215                             && font.language()->lang() == "arabic") {
 216                                 if (Encodings::IsComposeChar_arabic(c))
 217                                         return 0;
 218                                 else
 219                                         c = transformChar(c, *pit, pos);
 220                         } else if (font.language()->lang() == "hebrew" &&
 221                                  Encodings::IsComposeChar_hebrew(c))
 222                                 return 0;
 223                 }
 224                 return font_metrics::width(c, font);
 225         }
 226
 227         if (c == Paragraph::META_INSET) {
 228                 InsetOld * tmpinset = pit->getInset(pos);
 229                 Assert(tmpinset);
 230                 if (tmpinset->lyxCode() == InsetOld::HFILL_CODE) {
 231                         // Because of the representation as vertical lines
 232                         return 3;
 233                 }
 234                 return tmpinset->width();
 235         }
 236
 237         if (IsSeparatorChar(c))
 238                 c = ' ';
 239         return font_metrics::width(c, font);
 240 }
 241
 242
 243 lyx::pos_type LyXText::log2vis(lyx::pos_type pos) const
 244 {
 245         if (bidi_start == -1)
 246                 return pos;
 247         else
 248                 return log2vis_list[pos - bidi_start];
 249 }
 250
 251
 252 lyx::pos_type LyXText::vis2log(lyx::pos_type pos) const
 253 {
 254         if (bidi_start == -1)
 255                 return pos;
 256         else
 257                 return vis2log_list[pos - bidi_start];
 258 }
 259
 260
 261 lyx::pos_type LyXText::bidi_level(lyx::pos_type pos) const
 262 {
 263         if (bidi_start == -1)
 264                 return 0;
 265         else
 266                 return bidi_levels[pos - bidi_start];
 267 }
 268
 269
 270 bool LyXText::bidi_InRange(lyx::pos_type pos) const
 271 {
 272         return bidi_start == -1 ||
 273                 (bidi_start <= pos && pos <= bidi_end);
 274 }
 275
 276
 277 void LyXText::computeBidiTables(ParagraphList::iterator pit,
 278    Buffer const * buf, RowList::iterator row) const
 279 {
 280         bidi_same_direction = true;
 281         if (!lyxrc.rtl_support) {
 282                 bidi_start = -1;
 283                 return;
 284         }
 285
 286         InsetOld * inset = pit->inInset();
 287         if (inset && inset->owner() &&
 288             inset->owner()->lyxCode() == InsetOld::ERT_CODE) {
 289                 bidi_start = -1;
 290                 return;
 291         }
 292
 293         bidi_start = row->pos();
 294         bidi_end = lastPrintablePos(*pit, row);
 295
 296         if (bidi_start > bidi_end) {
 297                 bidi_start = -1;
 298                 return;
 299         }
 300
 301         if (bidi_end + 2 - bidi_start >
 302             static_cast<pos_type>(log2vis_list.size())) {
 303                 pos_type new_size =
 304                         (bidi_end + 2 - bidi_start < 500) ?
 305                         500 : 2 * (bidi_end + 2 - bidi_start);
 306                 log2vis_list.resize(new_size);
 307                 vis2log_list.resize(new_size);
 308                 bidi_levels.resize(new_size);
 309         }
 310
 311         vis2log_list[bidi_end + 1 - bidi_start] = -1;
 312         log2vis_list[bidi_end + 1 - bidi_start] = -1;
 313
 314         pos_type stack[2];
 315         bool const rtl_par =
 316                 pit->isRightToLeftPar(buf->params);
 317         int level = 0;
 318         bool rtl = false;
 319         bool rtl0 = false;
 320         pos_type const body_pos = pit->beginningOfBody();
 321
 322         for (pos_type lpos = bidi_start; lpos <= bidi_end; ++lpos) {
 323                 bool is_space = pit->isLineSeparator(lpos);
 324                 pos_type const pos =
 325                         (is_space && lpos + 1 <= bidi_end &&
 326                          !pit->isLineSeparator(lpos + 1) &&
 327                          !pit->isNewline(lpos + 1))
 328                         ? lpos + 1 : lpos;
 329                 LyXFont font = pit->getFontSettings(buf->params, pos);
 330                 if (pos != lpos && 0 < lpos && rtl0 && font.isRightToLeft() &&
 331                     font.number() == LyXFont::ON &&
 332                     pit->getFontSettings(buf->params, lpos - 1).number()
 333                     == LyXFont::ON) {
 334                         font = pit->getFontSettings(buf->params, lpos);
 335                         is_space = false;
 336                 }
 337
 338
 339                 bool new_rtl = font.isVisibleRightToLeft();
 340                 bool new_rtl0 = font.isRightToLeft();
 341                 int new_level;
 342
 343                 if (lpos == body_pos - 1
 344                     && row->pos() < body_pos - 1
 345                     && is_space) {
 346                         new_level = (rtl_par) ? 1 : 0;
 347                         new_rtl = new_rtl0 = rtl_par;
 348                 } else if (new_rtl0)
 349                         new_level = (new_rtl) ? 1 : 2;
 350                 else
 351                         new_level = (rtl_par) ? 2 : 0;
 352
 353                 if (is_space && new_level >= level) {
 354                         new_level = level;
 355                         new_rtl = rtl;
 356                         new_rtl0 = rtl0;
 357                 }
 358
 359                 int new_level2 = new_level;
 360
 361                 if (level == new_level && rtl0 != new_rtl0) {
 362                         --new_level2;
 363                         log2vis_list[lpos - bidi_start] = (rtl) ? 1 : -1;
 364                 } else if (level < new_level) {
 365                         log2vis_list[lpos - bidi_start] =  (rtl) ? -1 : 1;
 366                         if (new_level > rtl_par)
 367                                 bidi_same_direction = false;
 368                 } else
 369                         log2vis_list[lpos - bidi_start] = (new_rtl) ? -1 : 1;
 370                 rtl = new_rtl;
 371                 rtl0 = new_rtl0;
 372                 bidi_levels[lpos - bidi_start] = new_level;
 373
 374                 while (level > new_level2) {
 375                         pos_type old_lpos = stack[--level];
 376                         int delta = lpos - old_lpos - 1;
 377                         if (level % 2)
 378                                 delta = -delta;
 379                         log2vis_list[lpos - bidi_start] += delta;
 380                         log2vis_list[old_lpos - bidi_start] += delta;
 381                 }
 382                 while (level < new_level)
 383                         stack[level++] = lpos;
 384         }
 385
 386         while (level > 0) {
 387                 pos_type const old_lpos = stack[--level];
 388                 int delta = bidi_end - old_lpos;
 389                 if (level % 2)
 390                         delta = -delta;
 391                 log2vis_list[old_lpos - bidi_start] += delta;
 392         }
 393
 394         pos_type vpos = bidi_start - 1;
 395         for (pos_type lpos = bidi_start;
 396              lpos <= bidi_end; ++lpos) {
 397                 vpos += log2vis_list[lpos - bidi_start];
 398                 vis2log_list[vpos - bidi_start] = lpos;
 399                 log2vis_list[lpos - bidi_start] = vpos;
 400         }
 401 }
 402
 403
 404 // This method requires a previous call to ComputeBidiTables()
 405 bool LyXText::isBoundary(Buffer const * buf, Paragraph const & par,
 406                          pos_type pos) const
 407 {
 408         if (!lyxrc.rtl_support || pos == 0)
 409                 return false;
 410
 411         if (!bidi_InRange(pos - 1)) {
 412                 /// This can happen if pos is the first char of a row.
 413                 /// Returning false in this case is incorrect!
 414                 return false;
 415         }
 416
 417         bool const rtl = bidi_level(pos - 1) % 2;
 418         bool const rtl2 = bidi_InRange(pos)
 419                 ? bidi_level(pos) % 2
 420                 : par.isRightToLeftPar(buf->params);
 421         return rtl != rtl2;
 422 }
 423
 424
 425 bool LyXText::isBoundary(Buffer const * buf, Paragraph const & par,
 426                          pos_type pos, LyXFont const & font) const
 427 {
 428         if (!lyxrc.rtl_support)
 429                 return false;    // This is just for speedup
 430
 431         bool const rtl = font.isVisibleRightToLeft();
 432         bool const rtl2 = bidi_InRange(pos)
 433                 ? bidi_level(pos) % 2
 434                 : par.isRightToLeftPar(buf->params);
 435         return rtl != rtl2;
 436 }
 437
 438
 439 int LyXText::leftMargin(ParagraphList::iterator pit, Row const & row) const
 440 {
 441         InsetOld * ins;
 442
 443         if (row.pos() < pit->size())
 444                 if (pit->getChar(row.pos()) == Paragraph::META_INSET &&
 445                     (ins = pit->getInset(row.pos())) &&
 446                     (ins->needFullRow() || ins->display()))
 447                         return LEFT_MARGIN;
 448
 449         LyXTextClass const & tclass =
 450                 bv()->buffer()->params.getLyXTextClass();
 451         LyXLayout_ptr const & layout = pit->layout();
 452
 453         string parindent = layout->parindent;
 454
 455         int x = LEFT_MARGIN;
 456
 457         x += font_metrics::signedWidth(tclass.leftmargin(), tclass.defaultfont());
 458
 459         // this is the way, LyX handles the LaTeX-Environments.
 460         // I have had this idea very late, so it seems to be a
 461         // later added hack and this is true
 462         if (!pit->getDepth()) {
 463                 if (pit->layout() == tclass.defaultLayout()) {
 464                         // find the previous same level paragraph
 465                         if (pit != ownerParagraphs().begin()) {
 466                                 ParagraphList::iterator newpit =
 467                                         depthHook(pit, ownerParagraphs(),
 468                                                   pit->getDepth());
 469                                 if (newpit == pit &&
 470                                     newpit->layout()->nextnoindent)
 471                                         parindent.erase();
 472                         }
 473                 }
 474         } else {
 475                 // find the next level paragraph
 476
 477                 ParagraphList::iterator newpar = outerHook(pit,
 478                                                            ownerParagraphs());
 479
 480                 // make a corresponding row. Needed to call leftMargin()
 481
 482                 // check wether it is a sufficent paragraph
 483                 if (newpar != ownerParagraphs().end() &&
 484                     newpar->layout()->isEnvironment()) {
 485                         x = leftMargin(newpar, Row(newpar->size()));
 486                 }
 487
 488                 if (newpar != ownerParagraphs().end() &&
 489                     pit->layout() == tclass.defaultLayout()) {
 490                         if (newpar->params().noindent())
 491                                 parindent.erase();
 492                         else {
 493                                 parindent = newpar->layout()->parindent;
 494                         }
 495
 496                 }
 497         }
 498
 499         LyXFont const labelfont = getLabelFont(pit);
 500         switch (layout->margintype) {
 501         case MARGIN_DYNAMIC:
 502                 if (!layout->leftmargin.empty()) {
 503                         x += font_metrics::signedWidth(layout->leftmargin,
 504                                                   tclass.defaultfont());
 505                 }
 506                 if (!pit->getLabelstring().empty()) {
 507                         x += font_metrics::signedWidth(layout->labelindent,
 508                                                   labelfont);
 509                         x += font_metrics::width(pit->getLabelstring(),
 510                                             labelfont);
 511                         x += font_metrics::width(layout->labelsep, labelfont);
 512                 }
 513                 break;
 514         case MARGIN_MANUAL:
 515                 x += font_metrics::signedWidth(layout->labelindent, labelfont);
 516                 // The width of an empty par, even with manual label, should be 0
 517                 if (!pit->empty() && row.pos() >= pit->beginningOfBody()) {
 518                         if (!pit->getLabelWidthString().empty()) {
 519                                 x += font_metrics::width(pit->getLabelWidthString(),
 520                                                labelfont);
 521                                 x += font_metrics::width(layout->labelsep, labelfont);
 522                         }
 523                 }
 524                 break;
 525         case MARGIN_STATIC:
 526                 x += font_metrics::signedWidth(layout->leftmargin, tclass.defaultfont()) * 4
 527                         / (pit->getDepth() + 4);
 528                 break;
 529         case MARGIN_FIRST_DYNAMIC:
 530                 if (layout->labeltype == LABEL_MANUAL) {
 531                         if (row.pos() >= pit->beginningOfBody()) {
 532                                 x += font_metrics::signedWidth(layout->leftmargin,
 533                                                           labelfont);
 534                         } else {
 535                                 x += font_metrics::signedWidth(layout->labelindent,
 536                                                           labelfont);
 537                         }
 538                 } else if (row.pos()
 539                            // Special case to fix problems with
 540                            // theorems (JMarc)
 541                            || (layout->labeltype == LABEL_STATIC
 542                                && layout->latextype == LATEX_ENVIRONMENT
 543                                && !isFirstInSequence(pit, ownerParagraphs()))) {
 544                         x += font_metrics::signedWidth(layout->leftmargin,
 545                                                   labelfont);
 546                 } else if (layout->labeltype != LABEL_TOP_ENVIRONMENT
 547                            && layout->labeltype != LABEL_BIBLIO
 548                            && layout->labeltype !=
 549                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 550                         x += font_metrics::signedWidth(layout->labelindent,
 551                                                   labelfont);
 552                         x += font_metrics::width(layout->labelsep, labelfont);
 553                         x += font_metrics::width(pit->getLabelstring(),
 554                                             labelfont);
 555                 }
 556                 break;
 557
 558         case MARGIN_RIGHT_ADDRESS_BOX:
 559         {
 560                 // ok, a terrible hack. The left margin depends on the widest
 561                 // row in this paragraph. Do not care about footnotes, they
 562                 // are *NOT* allowed in the LaTeX realisation of this layout.
 563
 564                 // find the first row of this paragraph
 565                 RowList::iterator rit = pit->rows.begin();
 566                 RowList::iterator end = pit->rows.end();
 567                 int minfill = rit->fill();
 568                 for ( ; rit != end; ++rit)
 569                         if (rit->fill() < minfill)
 570                                 minfill = rit->fill();
 571
 572                 x += font_metrics::signedWidth(layout->leftmargin,
 573                         tclass.defaultfont());
 574                 x += minfill;
 575         }
 576         break;
 577         }
 578
 579         if (workWidth() > 0 && !pit->params().leftIndent().zero()) {
 580                 LyXLength const len = pit->params().leftIndent();
 581                 int const tw = inset_owner ?
 582                         inset_owner->latexTextWidth(bv()) : workWidth();
 583                 x += len.inPixels(tw);
 584         }
 585
 586         LyXAlignment align;
 587
 588         if (pit->params().align() == LYX_ALIGN_LAYOUT)
 589                 align = layout->align;
 590         else
 591                 align = pit->params().align();
 592
 593         // set the correct parindent
 594         if (row.pos() == 0) {
 595                 if ((layout->labeltype == LABEL_NO_LABEL
 596                      || layout->labeltype == LABEL_TOP_ENVIRONMENT
 597                      || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 598                      || (layout->labeltype == LABEL_STATIC
 599                          && layout->latextype == LATEX_ENVIRONMENT
 600                          && !isFirstInSequence(pit, ownerParagraphs())))
 601                     && align == LYX_ALIGN_BLOCK
 602                     && !pit->params().noindent()
 603                         // in tabulars and ert paragraphs are never indented!
 604                         && (!pit->inInset() || !pit->inInset()->owner() ||
 605                                 (pit->inInset()->owner()->lyxCode() != InsetOld::TABULAR_CODE &&
 606                                  pit->inInset()->owner()->lyxCode() != InsetOld::ERT_CODE))
 607                     && (pit->layout() != tclass.defaultLayout() ||
 608                         bv()->buffer()->params.paragraph_separation ==
 609                         BufferParams::PARSEP_INDENT)) {
 610                         x += font_metrics::signedWidth(parindent,
 611                                                   tclass.defaultfont());
 612                 } else if (layout->labeltype == LABEL_BIBLIO) {
 613                         // ale970405 Right width for bibitems
 614                         x += bibitemMaxWidth(bv(), tclass.defaultfont());
 615                 }
 616         }
 617
 618         return x;
 619 }
 620
 621
 622 int LyXText::rightMargin(ParagraphList::iterator pit,
 623         Buffer const & buf, Row const & row) const
 624 {
 625         InsetOld * ins;
 626
 627         if (row.pos() < pit->size())
 628                 if ((pit->getChar(row.pos()) == Paragraph::META_INSET) &&
 629                     (ins = pit->getInset(row.pos())) &&
 630                     (ins->needFullRow() || ins->display()))
 631                         return PAPER_MARGIN;
 632
 633         LyXTextClass const & tclass = buf.params.getLyXTextClass();
 634         LyXLayout_ptr const & layout = pit->layout();
 635
 636         return PAPER_MARGIN
 637                 + font_metrics::signedWidth(tclass.rightmargin(),
 638                                        tclass.defaultfont());
 639                 + font_metrics::signedWidth(layout->rightmargin,
 640                                        tclass.defaultfont())
 641                 * 4 / (pit->getDepth() + 4);
 642 }
 643
 644
 645 int LyXText::labelEnd(ParagraphList::iterator pit, Row const & row) const
 646 {
 647         if (pit->layout()->margintype == MARGIN_MANUAL) {
 648                 Row tmprow = row;
 649                 tmprow.pos(pit->size());
 650                 // return the beginning of the body
 651                 return leftMargin(pit, tmprow);
 652         }
 653
 654         // LabelEnd is only needed if the layout
 655         // fills a flushleft label.
 656         return 0;
 657 }
 658
 659
 660 namespace {
 661
 662 // this needs special handling - only newlines count as a break point
 663 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
 664 {
 665         for (; i < par.size(); ++i) {
 666                 if (par.isNewline(i))
 667                         return i;
 668         }
 669
 670         return par.size();
 671 }
 672
 673 };
 674
 675
 676 pos_type LyXText::rowBreakPoint(ParagraphList::iterator pit,
 677         Row const & row) const
 678 {
 679         // maximum pixel width of a row.
 680         int width = workWidth() - rightMargin(pit, *bv()->buffer(), row);
 681
 682         // inset->textWidth() returns -1 via workWidth(),
 683         // but why ?
 684         if (width < 0)
 685                 return pit->size();
 686
 687         LyXLayout_ptr const & layout = pit->layout();
 688
 689         if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX)
 690                 return addressBreakPoint(row.pos(), *pit);
 691
 692         pos_type const pos = row.pos();
 693         pos_type const body_pos = pit->beginningOfBody();
 694         pos_type const last = pit->size();
 695         pos_type point = last;
 696
 697         if (pos == last)
 698                 return last;
 699
 700         // Now we iterate through until we reach the right margin
 701         // or the end of the par, then choose the possible break
 702         // nearest that.
 703
 704         int const left = leftMargin(pit, row);
 705         int x = left;
 706
 707         // pixel width since last breakpoint
 708         int chunkwidth = 0;
 709         bool fullrow = false;
 710
 711         pos_type i = pos;
 712
 713         // We re-use the font resolution for the entire font span when possible
 714         LyXFont font = getFont(pit, i);
 715         lyx::pos_type endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 716
 717         for (; i < last; ++i) {
 718                 if (pit->isNewline(i)) {
 719                         point = i;
 720                         break;
 721                 }
 722
 723                 char const c = pit->getChar(i);
 724                 if (i > endPosOfFontSpan) {
 725                         font = getFont(pit, i);
 726                         endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 727                 }
 728
 729                 int thiswidth;
 730
 731                 // add the auto-hfill from label end to the body
 732                 if (body_pos && i == body_pos) {
 733                         thiswidth = font_metrics::width(layout->labelsep, getLabelFont(pit));
 734                         if (pit->isLineSeparator(i - 1))
 735                                 thiswidth -= singleWidth(pit, i - 1);
 736                         int left_margin = labelEnd(pit, row);
 737                         if (thiswidth + x < left_margin)
 738                                 thiswidth = left_margin - x;
 739                         thiswidth += singleWidth(pit, i, c, font);
 740                 } else {
 741                         thiswidth = singleWidth(pit, i, c, font);
 742                 }
 743
 744                 x += thiswidth;
 745                 chunkwidth += thiswidth;
 746
 747                 InsetOld * in = pit->isInset(i) ? pit->getInset(i) : 0;
 748                 fullrow = in && (in->display() || in->needFullRow());
 749
 750                 // break before a character that will fall off
 751                 // the right of the row
 752                 if (x >= width) {
 753                         // if no break before or we are at an inset
 754                         // that will take up a row, break here
 755                         if (point == last || fullrow || chunkwidth >= (width - left)) {
 756                                 if (pos < i)
 757                                         point = i - 1;
 758                                 else
 759                                         point = i;
 760                         }
 761                         break;
 762                 }
 763
 764                 if (!in || in->isChar()) {
 765                         // some insets are line separators too
 766                         if (pit->isLineSeparator(i)) {
 767                                 point = i;
 768                                 chunkwidth = 0;
 769                         }
 770                         continue;
 771                 }
 772
 773                 if (!fullrow)
 774                         continue;
 775
 776                 // full row insets start at a new row
 777                 if (i == pos) {
 778                         if (pos < last - 1) {
 779                                 point = i;
 780                                 if (pit->isLineSeparator(i + 1))
 781                                         ++point;
 782                         } else {
 783                                 // to avoid extra rows
 784                                 point = last;
 785                         }
 786                 } else {
 787                         point = i - 1;
 788                 }
 789
 790                 return point;
 791         }
 792
 793         if (point == last && x >= width) {
 794                 // didn't find one, break at the point we reached the edge
 795                 point = i;
 796         } else if (i == last && x < width) {
 797                 // found one, but we fell off the end of the par, so prefer
 798                 // that.
 799                 point = last;
 800         }
 801
 802         // manual labels cannot be broken in LaTeX. But we
 803         // want to make our on-screen rendering of footnotes
 804         // etc. still break
 805         if (!fullrow && body_pos && point < body_pos)
 806                 point = body_pos - 1;
 807
 808         return point;
 809 }
 810
 811
 812 // returns the minimum space a row needs on the screen in pixel
 813 int LyXText::fill(ParagraphList::iterator pit,
 814         RowList::iterator row, int paper_width) const
 815 {
 816         if (paper_width < 0)
 817                 return 0;
 818
 819         int w;
 820         // get the pure distance
 821         pos_type const last = lastPrintablePos(*pit, row);
 822
 823         LyXLayout_ptr const & layout = pit->layout();
 824
 825         // special handling of the right address boxes
 826         if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX) {
 827                 int const tmpfill = row->fill();
 828                 row->fill(0); // the minfill in MarginLeft()
 829                 w = leftMargin(pit, *row);
 830                 row->fill(tmpfill);
 831         } else
 832                 w = leftMargin(pit, *row);
 833
 834         pos_type const body_pos = pit->beginningOfBody();
 835         pos_type i = row->pos();
 836
 837         if (! pit->empty() && i <= last) {
 838                 // We re-use the font resolution for the entire span when possible
 839                 LyXFont font = getFont(pit, i);
 840                 lyx::pos_type endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 841                 while (i <= last) {
 842                         if (body_pos > 0 && i == body_pos) {
 843                                 w += font_metrics::width(layout->labelsep, getLabelFont(pit));
 844                                 if (pit->isLineSeparator(i - 1))
 845                                         w -= singleWidth(pit, i - 1);
 846                                 int left_margin = labelEnd(pit, *row);
 847                                 if (w < left_margin)
 848                                         w = left_margin;
 849                         }
 850                         char const c = pit->getChar(i);
 851                         if (IsPrintable(c) && i > endPosOfFontSpan) {
 852                                 // We need to get the next font
 853                                 font = getFont(pit, i);
 854                                 endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 855                         }
 856                         w += singleWidth(pit, i, c, font);
 857                         ++i;
 858                 }
 859         }
 860         if (body_pos > 0 && body_pos > last) {
 861                 w += font_metrics::width(layout->labelsep, getLabelFont(pit));
 862                 if (last >= 0 && pit->isLineSeparator(last))
 863                         w -= singleWidth(pit, last);
 864                 int const left_margin = labelEnd(pit, *row);
 865                 if (w < left_margin)
 866                         w = left_margin;
 867         }
 868
 869         int const fill = paper_width - w - rightMargin(pit, *bv()->buffer(), *row);
 870
 871         // If this case happens, it means that our calculation
 872         // of the widths of the chars when we do rowBreakPoint()
 873         // went wrong for some reason. Typically in list bodies.
 874         // Things just about hobble on anyway, though you'll end
 875         // up with a "fill_separator" less than zero, which corresponds
 876         // to inter-word spacing being too small. Hopefully this problem
 877         // will die when the label hacks die.
 878         if (lyxerr.debugging() && fill < 0) {
 879                 lyxerr[Debug::GUI] << "Eek, fill() was < 0: " << fill
 880                         << " w " << w << " paper_width " << paper_width
 881                         << " right margin " << rightMargin(pit, *bv()->buffer(), *row) << endl;
 882         }
 883         return fill;
 884 }
 885
 886
 887 // returns the minimum space a manual label needs on the screen in pixel
 888 int LyXText::labelFill(ParagraphList::iterator pit, Row const & row) const
 889 {
 890         pos_type last = pit->beginningOfBody();
 891
 892         Assert(last > 0);
 893
 894         // -1 because a label ends either with a space that is in the label,
 895         // or with the beginning of a footnote that is outside the label.
 896         --last;
 897
 898         // a separator at this end does not count
 899         if (pit->isLineSeparator(last))
 900                 --last;
 901
 902         int w = 0;
 903         pos_type i = row.pos();
 904         while (i <= last) {
 905                 w += singleWidth(pit, i);
 906                 ++i;
 907         }
 908
 909         int fill = 0;
 910         string const & labwidstr = pit->params().labelWidthString();
 911         if (!labwidstr.empty()) {
 912                 LyXFont const labfont = getLabelFont(pit);
 913                 int const labwidth = font_metrics::width(labwidstr, labfont);
 914                 fill = max(labwidth - w, 0);
 915         }
 916
 917         return fill;
 918 }
 919
 920
 921 LColor::color LyXText::backgroundColor() const
 922 {
 923         if (inset_owner)
 924                 return inset_owner->backgroundColor();
 925         else
 926                 return LColor::background;
 927 }
 928
 929
 930 void LyXText::setHeightOfRow(ParagraphList::iterator pit, RowList::iterator rit)
 931 {
 932         // get the maximum ascent and the maximum descent
 933         double layoutasc = 0;
 934         double layoutdesc = 0;
 935         double tmptop = 0;
 936
 937         // ok, let us initialize the maxasc and maxdesc value.
 938         // Only the fontsize count. The other properties
 939         // are taken from the layoutfont. Nicer on the screen :)
 940         LyXLayout_ptr const & layout = pit->layout();
 941
 942         // as max get the first character of this row then it can increase but not
 943         // decrease the height. Just some point to start with so we don't have to
 944         // do the assignment below too often.
 945         LyXFont font = getFont(pit, rit->pos());
 946         LyXFont::FONT_SIZE const tmpsize = font.size();
 947         font = getLayoutFont(pit);
 948         LyXFont::FONT_SIZE const size = font.size();
 949         font.setSize(tmpsize);
 950
 951         LyXFont labelfont = getLabelFont(pit);
 952
 953         double spacing_val = 1.0;
 954         if (!pit->params().spacing().isDefault())
 955                 spacing_val = pit->params().spacing().getValue();
 956         else
 957                 spacing_val = bv()->buffer()->params.spacing.getValue();
 958         //lyxerr << "spacing_val = " << spacing_val << endl;
 959
 960         int maxasc  = int(font_metrics::maxAscent(font) *
 961                           layout->spacing.getValue() * spacing_val);
 962         int maxdesc = int(font_metrics::maxDescent(font) *
 963                           layout->spacing.getValue() * spacing_val);
 964
 965         pos_type const pos_end = lastPos(*pit, rit);
 966         int labeladdon = 0;
 967         int maxwidth = 0;
 968
 969         if (!pit->empty()) {
 970                 // We re-use the font resolution for the entire font span when possible
 971                 LyXFont font = getFont(pit, rit->pos());
 972                 lyx::pos_type endPosOfFontSpan = pit->getEndPosOfFontSpan(rit->pos());
 973
 974                 // Optimisation
 975                 Paragraph const & par = *pit;
 976
 977                 // Check if any insets are larger
 978                 for (pos_type pos = rit->pos(); pos <= pos_end; ++pos) {
 979                         // Manual inlined optimised version of common case of
 980                         // "maxwidth += singleWidth(pit, pos);"
 981                         char const c = par.getChar(pos);
 982
 983                         if (IsPrintable(c)) {
 984                                 if (pos > endPosOfFontSpan) {
 985                                         // We need to get the next font
 986                                         font = getFont(pit, pos);
 987                                         endPosOfFontSpan = par.getEndPosOfFontSpan(pos);
 988                                 }
 989                                 if (! font.language()->RightToLeft()) {
 990                                         maxwidth += font_metrics::width(c, font);
 991                                 } else {
 992                                         // Fall-back to normal case
 993                                         maxwidth += singleWidth(pit, pos, c, font);
 994                                         // And flush font cache
 995                                         endPosOfFontSpan = 0;
 996                                 }
 997                         } else {
 998                                 // Special handling of insets - are any larger?
 999                                 if (par.isInset(pos)) {
1000                                         InsetOld const * tmpinset = par.getInset(pos);
1001                                         if (tmpinset) {
1002                                                 maxwidth += tmpinset->width();
1003                                                 maxasc = max(maxasc, tmpinset->ascent());
1004                                                 maxdesc = max(maxdesc, tmpinset->descent());
1005                                         }
1006                                 } else {
1007                                         // Fall-back to normal case
1008                                         maxwidth += singleWidth(pit, pos, c, font);
1009                                         // And flush font cache
1010                                         endPosOfFontSpan = 0;
1011                                 }
1012                         }
1013                 }
1014         }
1015
1016         // Check if any custom fonts are larger (Asger)
1017         // This is not completely correct, but we can live with the small,
1018         // cosmetic error for now.
1019         LyXFont::FONT_SIZE maxsize =
1020                 pit->highestFontInRange(rit->pos(), pos_end, size);
1021         if (maxsize > font.size()) {
1022                 font.setSize(maxsize);
1023                 maxasc = max(maxasc, font_metrics::maxAscent(font));
1024                 maxdesc = max(maxdesc, font_metrics::maxDescent(font));
1025         }
1026
1027         // This is nicer with box insets:
1028         ++maxasc;
1029         ++maxdesc;
1030
1031         rit->ascent_of_text(maxasc);
1032
1033         // is it a top line?
1034         if (!rit->pos()) {
1035
1036                 // some parksips VERY EASY IMPLEMENTATION
1037                 if (bv()->buffer()->params.paragraph_separation ==
1038                         BufferParams::PARSEP_SKIP)
1039                 {
1040                         if (layout->isParagraph()
1041                                 && pit->getDepth() == 0
1042                                 && pit != ownerParagraphs().begin())
1043                         {
1044                                 maxasc += bv()->buffer()->params.getDefSkip().inPixels(*bv());
1045                         } else if (pit != ownerParagraphs().begin() &&
1046                                    boost::prior(pit)->layout()->isParagraph() &&
1047                                    boost::prior(pit)->getDepth() == 0)
1048                         {
1049                                 // is it right to use defskip here too? (AS)
1050                                 maxasc += bv()->buffer()->params.getDefSkip().inPixels(*bv());
1051                         }
1052                 }
1053
1054                 // the top margin
1055                 if (pit == ownerParagraphs().begin() && !isInInset())
1056                         maxasc += PAPER_MARGIN;
1057
1058                 // add the vertical spaces, that the user added
1059                 maxasc += getLengthMarkerHeight(*bv(), pit->params().spaceTop());
1060
1061                 // do not forget the DTP-lines!
1062                 // there height depends on the font of the nearest character
1063                 if (pit->params().lineTop())
1064
1065                         maxasc += 2 * font_metrics::ascent('x', getFont(pit, 0));
1066                 // and now the pagebreaks
1067                 if (pit->params().pagebreakTop())
1068                         maxasc += 3 * defaultRowHeight();
1069
1070                 if (pit->params().startOfAppendix())
1071                         maxasc += 3 * defaultRowHeight();
1072
1073                 // This is special code for the chapter, since the label of this
1074                 // layout is printed in an extra row
1075                 if (layout->labeltype == LABEL_COUNTER_CHAPTER
1076                         && bv()->buffer()->params.secnumdepth >= 0)
1077                 {
1078                         float spacing_val = 1.0;
1079                         if (!pit->params().spacing().isDefault()) {
1080                                 spacing_val = pit->params().spacing().getValue();
1081                         } else {
1082                                 spacing_val = bv()->buffer()->params.spacing.getValue();
1083                         }
1084
1085                         labeladdon = int(font_metrics::maxDescent(labelfont) *
1086                                          layout->spacing.getValue() *
1087                                          spacing_val)
1088                                 + int(font_metrics::maxAscent(labelfont) *
1089                                       layout->spacing.getValue() *
1090                                       spacing_val);
1091                 }
1092
1093                 // special code for the top label
1094                 if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
1095                      || layout->labeltype == LABEL_BIBLIO
1096                      || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
1097                     && isFirstInSequence(pit, ownerParagraphs())
1098                     && !pit->getLabelstring().empty())
1099                 {
1100                         float spacing_val = 1.0;
1101                         if (!pit->params().spacing().isDefault()) {
1102                                 spacing_val = pit->params().spacing().getValue();
1103                         } else {
1104                                 spacing_val = bv()->buffer()->params.spacing.getValue();
1105                         }
1106
1107                         labeladdon = int(
1108                                 (font_metrics::maxAscent(labelfont) +
1109                                  font_metrics::maxDescent(labelfont)) *
1110                                   layout->spacing.getValue() *
1111                                   spacing_val
1112                                 + layout->topsep * defaultRowHeight()
1113                                 + layout->labelbottomsep * defaultRowHeight());
1114                 }
1115
1116                 // And now the layout spaces, for example before and after
1117                 // a section, or between the items of a itemize or enumerate
1118                 // environment.
1119
1120                 if (!pit->params().pagebreakTop()) {
1121                         ParagraphList::iterator prev =
1122                                 depthHook(pit, ownerParagraphs(),
1123                                           pit->getDepth());
1124                         if (prev != pit && prev->layout() == layout &&
1125                                 prev->getDepth() == pit->getDepth() &&
1126                                 prev->getLabelWidthString() == pit->getLabelWidthString())
1127                         {
1128                                 layoutasc = (layout->itemsep * defaultRowHeight());
1129                         } else if (rit != firstRow()) {
1130                                 tmptop = layout->topsep;
1131
1132                                 //if (boost::prior(pit)->getDepth() >= pit->getDepth())
1133                                 //      tmptop -= getPar(previousRow(rit))->layout()->bottomsep;
1134
1135                                 if (tmptop > 0)
1136                                         layoutasc = (tmptop * defaultRowHeight());
1137                         } else if (pit->params().lineTop()) {
1138                                 tmptop = layout->topsep;
1139
1140                                 if (tmptop > 0)
1141                                         layoutasc = (tmptop * defaultRowHeight());
1142                         }
1143
1144                         prev = outerHook(pit, ownerParagraphs());
1145                         if (prev != ownerParagraphs().end())  {
1146                                 maxasc += int(prev->layout()->parsep * defaultRowHeight());
1147                         } else if (pit != ownerParagraphs().begin()) {
1148                                 ParagraphList::iterator prior_pit = boost::prior(pit);
1149                                 if (prior_pit->getDepth() != 0 ||
1150                                     prior_pit->layout() == layout) {
1151                                         maxasc += int(layout->parsep * defaultRowHeight());
1152                                 }
1153                         }
1154                 }
1155         }
1156
1157         // is it a bottom line?
1158         if (boost::next(rit) == pit->rows.end()) {
1159                 // the bottom margin
1160                 ParagraphList::iterator nextpit = boost::next(pit);
1161                 if (nextpit == ownerParagraphs().end() && !isInInset())
1162                         maxdesc += PAPER_MARGIN;
1163
1164                 // add the vertical spaces, that the user added
1165                 maxdesc += getLengthMarkerHeight(*bv(), pit->params().spaceBottom());
1166
1167                 // do not forget the DTP-lines!
1168                 // there height depends on the font of the nearest character
1169                 if (pit->params().lineBottom())
1170                         maxdesc += 2 * font_metrics::ascent('x',
1171                                         getFont(pit, max(pos_type(0), pit->size() - 1)));
1172
1173                 // and now the pagebreaks
1174                 if (pit->params().pagebreakBottom())
1175                         maxdesc += 3 * defaultRowHeight();
1176
1177                 // and now the layout spaces, for example before and after
1178                 // a section, or between the items of a itemize or enumerate
1179                 // environment
1180                 if (!pit->params().pagebreakBottom()
1181                     && nextpit != ownerParagraphs().end()) {
1182                         ParagraphList::iterator comparepit = pit;
1183                         float usual = 0;
1184                         float unusual = 0;
1185
1186                         if (comparepit->getDepth() > nextpit->getDepth()) {
1187                                 usual = (comparepit->layout()->bottomsep * defaultRowHeight());
1188                                 comparepit = depthHook(comparepit, ownerParagraphs(), nextpit->getDepth());
1189                                 if (comparepit->layout()!= nextpit->layout()
1190                                         || nextpit->getLabelWidthString() !=
1191                                         comparepit->getLabelWidthString())
1192                                 {
1193                                         unusual = (comparepit->layout()->bottomsep * defaultRowHeight());
1194                                 }
1195                                 if (unusual > usual)
1196                                         layoutdesc = unusual;
1197                                 else
1198                                         layoutdesc = usual;
1199                         } else if (comparepit->getDepth() ==  nextpit->getDepth()) {
1200
1201                                 if (comparepit->layout() != nextpit->layout()
1202                                         || nextpit->getLabelWidthString() !=
1203                                         comparepit->getLabelWidthString())
1204                                         layoutdesc = int(comparepit->layout()->bottomsep * defaultRowHeight());
1205                         }
1206                 }
1207         }
1208
1209         // incalculate the layout spaces
1210         maxasc += int(layoutasc * 2 / (2 + pit->getDepth()));
1211         maxdesc += int(layoutdesc * 2 / (2 + pit->getDepth()));
1212
1213         // calculate the new height of the text
1214         height -= rit->height();
1215
1216         rit->height(maxasc + maxdesc + labeladdon);
1217         rit->baseline(maxasc + labeladdon);
1218
1219         height += rit->height();
1220
1221         rit->top_of_text(rit->baseline() - font_metrics::maxAscent(font));
1222
1223         double x = 0;
1224         if (layout->margintype != MARGIN_RIGHT_ADDRESS_BOX) {
1225 #warning needed?
1226 #if 0
1227                 // this IS needed
1228                 rit->width(maxwidth);
1229                 double dummy;
1230                 prepareToPrint(pit, rit, x, dummy, dummy, dummy, false);
1231 #endif
1232         }
1233         rit->width(int(maxwidth + x));
1234         if (inset_owner) {
1235                 width = max(0, workWidth());
1236                 RowList::iterator rit = firstRow();
1237                 RowList::iterator end = endRow();
1238                 ParagraphList::iterator it = ownerParagraphs().begin();
1239                 while (rit != end) {
1240                         if (rit->width() > width)
1241                                 width = rit->width();
1242                         nextRow(it, rit);
1243                 }
1244         }
1245 }
1246
1247
1248 void LyXText::breakParagraph(ParagraphList & paragraphs, char keep_layout)
1249 {
1250         // allow only if at start or end, or all previous is new text
1251         if (cursor.pos() && cursor.pos() != cursor.par()->size()
1252                 && cursor.par()->isChangeEdited(0, cursor.pos()))
1253                 return;
1254
1255         LyXTextClass const & tclass =
1256                 bv()->buffer()->params.getLyXTextClass();
1257         LyXLayout_ptr const & layout = cursor.par()->layout();
1258
1259         // this is only allowed, if the current paragraph is not empty or caption
1260         // and if it has not the keepempty flag active
1261         if (cursor.par()->empty() && !cursor.par()->allowEmpty()
1262            && layout->labeltype != LABEL_SENSITIVE)
1263                 return;
1264
1265         recordUndo(bv(), Undo::ATOMIC, cursor.par());
1266
1267         // Always break behind a space
1268         //
1269         // It is better to erase the space (Dekel)
1270         if (cursor.pos() < cursor.par()->size()
1271              && cursor.par()->isLineSeparator(cursor.pos()))
1272            cursor.par()->erase(cursor.pos());
1273
1274         // break the paragraph
1275         if (keep_layout)
1276                 keep_layout = 2;
1277         else
1278                 keep_layout = layout->isEnvironment();
1279
1280         // we need to set this before we insert the paragraph. IMO the
1281         // breakParagraph call should return a bool if it inserts the
1282         // paragraph before or behind and we should react on that one
1283         // but we can fix this in 1.3.0 (Jug 20020509)
1284         bool const isempty = (cursor.par()->allowEmpty() && cursor.par()->empty());
1285         ::breakParagraph(bv()->buffer()->params, paragraphs, cursor.par(),
1286                          cursor.pos(), keep_layout);
1287
1288 #warning Trouble Point! (Lgb)
1289         // When ::breakParagraph is called from within an inset we must
1290         // ensure that the correct ParagraphList is used. Today that is not
1291         // the case and the Buffer::paragraphs is used. Not good. (Lgb)
1292         ParagraphList::iterator next_par = boost::next(cursor.par());
1293
1294         // well this is the caption hack since one caption is really enough
1295         if (layout->labeltype == LABEL_SENSITIVE) {
1296                 if (!cursor.pos())
1297                         // set to standard-layout
1298                         cursor.par()->applyLayout(tclass.defaultLayout());
1299                 else
1300                         // set to standard-layout
1301                         next_par->applyLayout(tclass.defaultLayout());
1302         }
1303
1304         // if the cursor is at the beginning of a row without prior newline,
1305         // move one row up!
1306         // This touches only the screen-update. Otherwise we would may have
1307         // an empty row on the screen
1308         if (cursor.pos() && cursorRow()->pos() == cursor.pos()
1309             && !cursor.par()->isNewline(cursor.pos() - 1))
1310         {
1311                 cursorLeft(bv());
1312         }
1313
1314         while (!next_par->empty() && next_par->isNewline(0))
1315                 next_par->erase(0);
1316
1317         updateCounters();
1318         redoParagraph(cursor.par());
1319         redoParagraph(next_par);
1320
1321         // This check is necessary. Otherwise the new empty paragraph will
1322         // be deleted automatically. And it is more friendly for the user!
1323         if (cursor.pos() || isempty)
1324                 setCursor(next_par, 0);
1325         else
1326                 setCursor(cursor.par(), 0);
1327 }
1328
1329
1330 // convenience function
1331 void LyXText::redoParagraph()
1332 {
1333         clearSelection();
1334         redoParagraph(cursor.par());
1335         setCursorIntern(cursor.par(), cursor.pos());
1336 }
1337
1338
1339 // insert a character, moves all the following breaks in the
1340 // same Paragraph one to the right and make a rebreak
1341 void LyXText::insertChar(char c)
1342 {
1343         recordUndo(bv(), Undo::INSERT, cursor.par());
1344
1345         // When the free-spacing option is set for the current layout,
1346         // disable the double-space checking
1347
1348         bool const freeSpacing = cursor.par()->layout()->free_spacing ||
1349                 cursor.par()->isFreeSpacing();
1350
1351         if (lyxrc.auto_number) {
1352                 static string const number_operators = "+-/*";
1353                 static string const number_unary_operators = "+-";
1354                 static string const number_seperators = ".,:";
1355
1356                 if (current_font.number() == LyXFont::ON) {
1357                         if (!IsDigit(c) && !contains(number_operators, c) &&
1358                             !(contains(number_seperators, c) &&
1359                               cursor.pos() >= 1 &&
1360                               cursor.pos() < cursor.par()->size() &&
1361                               getFont(cursor.par(), cursor.pos()).number() == LyXFont::ON &&
1362                               getFont(cursor.par(), cursor.pos() - 1).number() == LyXFont::ON)
1363                            )
1364                                 number(bv()); // Set current_font.number to OFF
1365                 } else if (IsDigit(c) &&
1366                            real_current_font.isVisibleRightToLeft()) {
1367                         number(bv()); // Set current_font.number to ON
1368
1369                         if (cursor.pos() > 0) {
1370                                 char const c = cursor.par()->getChar(cursor.pos() - 1);
1371                                 if (contains(number_unary_operators, c) &&
1372                                     (cursor.pos() == 1 ||
1373                                      cursor.par()->isSeparator(cursor.pos() - 2) ||
1374                                      cursor.par()->isNewline(cursor.pos() - 2))
1375                                   ) {
1376                                         setCharFont(
1377                                                     cursor.par(),
1378                                                     cursor.pos() - 1,
1379                                                     current_font);
1380                                 } else if (contains(number_seperators, c) &&
1381                                            cursor.pos() >= 2 &&
1382                                            getFont(
1383                                                    cursor.par(),
1384                                                    cursor.pos() - 2).number() == LyXFont::ON) {
1385                                         setCharFont(
1386                                                     cursor.par(),
1387                                                     cursor.pos() - 1,
1388                                                     current_font);
1389                                 }
1390                         }
1391                 }
1392         }
1393
1394
1395         // First check, if there will be two blanks together or a blank at
1396         // the beginning of a paragraph.
1397         // I decided to handle blanks like normal characters, the main
1398         // difference are the special checks when calculating the row.fill
1399         // (blank does not count at the end of a row) and the check here
1400
1401         // The bug is triggered when we type in a description environment:
1402         // The current_font is not changed when we go from label to main text
1403         // and it should (along with realtmpfont) when we type the space.
1404         // CHECK There is a bug here! (Asger)
1405
1406         // store the current font.  This is because of the use of cursor
1407         // movements. The moving cursor would refresh the current font
1408         LyXFont realtmpfont = real_current_font;
1409         LyXFont rawtmpfont = current_font;
1410
1411         if (!freeSpacing && IsLineSeparatorChar(c)) {
1412                 if ((cursor.pos() > 0
1413                      && cursor.par()->isLineSeparator(cursor.pos() - 1))
1414                     || (cursor.pos() > 0
1415                         && cursor.par()->isNewline(cursor.pos() - 1))
1416                     || (cursor.pos() == 0)) {
1417                         static bool sent_space_message = false;
1418                         if (!sent_space_message) {
1419                                 if (cursor.pos() == 0)
1420                                         bv()->owner()->message(_("You cannot insert a space at the beginning of a paragraph. Please read the Tutorial."));
1421                                 else
1422                                         bv()->owner()->message(_("You cannot type two spaces this way. Please read the Tutorial."));
1423                                 sent_space_message = true;
1424                         }
1425                         charInserted();
1426                         return;
1427                 }
1428         }
1429
1430         // Here case LyXText::InsertInset already inserted the character
1431         if (c != Paragraph::META_INSET)
1432                 cursor.par()->insertChar(cursor.pos(), c);
1433
1434         setCharFont(cursor.par(), cursor.pos(), rawtmpfont);
1435
1436         current_font = rawtmpfont;
1437         real_current_font = realtmpfont;
1438         redoParagraph(cursor.par());
1439         setCursor(cursor.par(), cursor.pos() + 1, false, cursor.boundary());
1440
1441         charInserted();
1442 }
1443
1444
1445 void LyXText::charInserted()
1446 {
1447         // Here we could call finishUndo for every 20 characters inserted.
1448         // This is from my experience how emacs does it. (Lgb)
1449         static unsigned int counter;
1450         if (counter < 20) {
1451                 ++counter;
1452         } else {
1453                 finishUndo();
1454                 counter = 0;
1455         }
1456 }
1457
1458
1459 void LyXText::prepareToPrint(ParagraphList::iterator pit,
1460            RowList::iterator const rit) const
1461 {
1462         double w = rit->fill();
1463         double fill_hfill = 0;
1464         double fill_label_hfill = 0;
1465         double fill_separator = 0;
1466         double x = 0;
1467
1468         bool const is_rtl =
1469                 pit->isRightToLeftPar(bv()->buffer()->params);
1470         if (is_rtl)
1471                 x = workWidth() > 0 ? rightMargin(pit, *bv()->buffer(), *rit) : 0;
1472         else
1473                 x = workWidth() > 0 ? leftMargin(pit, *rit) : 0;
1474
1475         // is there a manual margin with a manual label
1476         LyXLayout_ptr const & layout = pit->layout();
1477
1478         if (layout->margintype == MARGIN_MANUAL
1479             && layout->labeltype == LABEL_MANUAL) {
1480                 /// We might have real hfills in the label part
1481                 int nlh = numberOfLabelHfills(*pit, rit);
1482
1483                 // A manual label par (e.g. List) has an auto-hfill
1484                 // between the label text and the body of the
1485                 // paragraph too.
1486                 // But we don't want to do this auto hfill if the par
1487                 // is empty.
1488                 if (!pit->empty())
1489                         ++nlh;
1490
1491                 if (nlh && !pit->getLabelWidthString().empty()) {
1492                         fill_label_hfill = labelFill(pit, *rit) / double(nlh);
1493                 }
1494         }
1495
1496         // are there any hfills in the row?
1497         int const nh = numberOfHfills(*pit, rit);
1498
1499         if (nh) {
1500                 if (w > 0)
1501                         fill_hfill = w / nh;
1502         // we don't have to look at the alignment if it is ALIGN_LEFT and
1503         // if the row is already larger then the permitted width as then
1504         // we force the LEFT_ALIGN'edness!
1505         } else if (int(rit->width()) < workWidth()) {
1506                 // is it block, flushleft or flushright?
1507                 // set x how you need it
1508                 int align;
1509                 if (pit->params().align() == LYX_ALIGN_LAYOUT) {
1510                         align = layout->align;
1511                 } else {
1512                         align = pit->params().align();
1513                 }
1514
1515                 // center displayed insets
1516                 InsetOld * inset = 0;
1517                 if (rit->pos() < pit->size()
1518                     && pit->isInset(rit->pos())
1519                     && (inset = pit->getInset(rit->pos()))
1520                     && (inset->display())) // || (inset->scroll() < 0)))
1521                     align = (inset->lyxCode() == InsetOld::MATHMACRO_CODE)
1522                         ? LYX_ALIGN_BLOCK : LYX_ALIGN_CENTER;
1523                 // ERT insets should always be LEFT ALIGNED on screen
1524                 inset = pit->inInset();
1525                 if (inset && inset->owner() &&
1526                         inset->owner()->lyxCode() == InsetOld::ERT_CODE)
1527                 {
1528                         align = LYX_ALIGN_LEFT;
1529                 }
1530
1531                 switch (align) {
1532             case LYX_ALIGN_BLOCK:
1533             {
1534                         int const ns = numberOfSeparators(*pit, rit);
1535                         RowList::iterator next_row = boost::next(rit);
1536                         if (ns
1537                                 && next_row != pit->rows.end()
1538                                 && !pit->isNewline(next_row->pos() - 1)
1539                           && !(pit->isInset(next_row->pos())
1540                                      && pit->getInset(next_row->pos())
1541                                      && pit->getInset(next_row->pos())->display())
1542                                 ) {
1543                                 fill_separator = w / ns;
1544                         } else if (is_rtl) {
1545                                 x += w;
1546                         }
1547                         break;
1548             }
1549             case LYX_ALIGN_RIGHT:
1550                         x += w;
1551                         break;
1552             case LYX_ALIGN_CENTER:
1553                         x += w / 2;
1554                         break;
1555                 }
1556         }
1557
1558         computeBidiTables(pit, bv()->buffer(), rit);
1559         if (is_rtl) {
1560                 pos_type body_pos = pit->beginningOfBody();
1561                 pos_type last = lastPos(*pit, rit);
1562
1563                 if (body_pos > 0 &&
1564                                 (body_pos - 1 > last ||
1565                                  !pit->isLineSeparator(body_pos - 1))) {
1566                         x += font_metrics::width(layout->labelsep, getLabelFont(pit));
1567                         if (body_pos - 1 <= last)
1568                                 x += fill_label_hfill;
1569                 }
1570         }
1571
1572         rit->fill_hfill(fill_hfill);
1573         rit->fill_label_hfill(fill_label_hfill);
1574         rit->fill_separator(fill_separator);
1575         rit->x(x);
1576 }
1577
1578
1579 // important for the screen
1580
1581
1582 // the cursor set functions have a special mechanism. When they
1583 // realize, that you left an empty paragraph, they will delete it.
1584 // They also delete the corresponding row
1585
1586 void LyXText::cursorRightOneWord()
1587 {
1588         ::cursorRightOneWord(cursor, ownerParagraphs());
1589         setCursor(cursor.par(), cursor.pos());
1590 }
1591
1592
1593 // Skip initial whitespace at end of word and move cursor to *start*
1594 // of prior word, not to end of next prior word.
1595 void LyXText::cursorLeftOneWord()
1596 {
1597         LyXCursor tmpcursor = cursor;
1598         ::cursorLeftOneWord(tmpcursor, ownerParagraphs());
1599         setCursor(tmpcursor.par(), tmpcursor.pos());
1600 }
1601
1602
1603 void LyXText::selectWord(word_location loc)
1604 {
1605         LyXCursor from = cursor;
1606         LyXCursor to;
1607         ::getWord(from, to, loc, ownerParagraphs());
1608         if (cursor != from)
1609                 setCursor(from.par(), from.pos());
1610         if (to == from)
1611                 return;
1612         selection.cursor = cursor;
1613         setCursor(to.par(), to.pos());
1614         setSelection();
1615 }
1616
1617
1618 // Select the word currently under the cursor when no
1619 // selection is currently set
1620 bool LyXText::selectWordWhenUnderCursor(word_location loc)
1621 {
1622         if (!selection.set()) {
1623                 selectWord(loc);
1624                 return selection.set();
1625         }
1626         return false;
1627 }
1628
1629
1630 void LyXText::acceptChange()
1631 {
1632         if (!selection.set() && cursor.par()->size())
1633                 return;
1634
1635         if (selection.start.par() == selection.end.par()) {
1636                 LyXCursor & startc = selection.start;
1637                 LyXCursor & endc = selection.end;
1638                 recordUndo(bv(), Undo::INSERT, startc.par());
1639                 startc.par()->acceptChange(startc.pos(), endc.pos());
1640                 finishUndo();
1641                 clearSelection();
1642                 redoParagraph(startc.par());
1643                 setCursorIntern(startc.par(), 0);
1644         }
1645 #warning handle multi par selection
1646 }
1647
1648
1649 void LyXText::rejectChange()
1650 {
1651         if (!selection.set() && cursor.par()->size())
1652                 return;
1653
1654         if (selection.start.par() == selection.end.par()) {
1655                 LyXCursor & startc = selection.start;
1656                 LyXCursor & endc = selection.end;
1657                 recordUndo(bv(), Undo::INSERT, startc.par());
1658                 startc.par()->rejectChange(startc.pos(), endc.pos());
1659                 finishUndo();
1660                 clearSelection();
1661                 redoParagraph(startc.par());
1662                 setCursorIntern(startc.par(), 0);
1663         }
1664 #warning handle multi par selection
1665 }
1666
1667
1668 // This function is only used by the spellchecker for NextWord().
1669 // It doesn't handle LYX_ACCENTs and probably never will.
1670 WordLangTuple const
1671 LyXText::selectNextWordToSpellcheck(float & value)
1672 {
1673         if (the_locking_inset) {
1674                 WordLangTuple word = the_locking_inset->selectNextWordToSpellcheck(bv(), value);
1675                 if (!word.word().empty()) {
1676                         value += float(cursor.y());
1677                         value /= float(height);
1678                         return word;
1679                 }
1680                 // we have to go on checking so move cursor to the next char
1681                 if (cursor.pos() == cursor.par()->size()) {
1682                         if (boost::next(cursor.par()) == ownerParagraphs().end())
1683                                 return word;
1684                         cursor.par(boost::next(cursor.par()));
1685                         cursor.pos(0);
1686                 } else
1687                         cursor.pos(cursor.pos() + 1);
1688         }
1689         ParagraphList::iterator tmppit = cursor.par();
1690
1691         // If this is not the very first word, skip rest of
1692         // current word because we are probably in the middle
1693         // of a word if there is text here.
1694         if (cursor.pos() || cursor.par() != ownerParagraphs().begin()) {
1695                 while (cursor.pos() < cursor.par()->size()
1696                        && cursor.par()->isLetter(cursor.pos()))
1697                         cursor.pos(cursor.pos() + 1);
1698         }
1699
1700         // Now, skip until we have real text (will jump paragraphs)
1701         while (true) {
1702                 ParagraphList::iterator cpit = cursor.par();
1703                 pos_type const cpos(cursor.pos());
1704
1705                 if (cpos == cpit->size()) {
1706                         if (boost::next(cpit) != ownerParagraphs().end()) {
1707                                 cursor.par(boost::next(cpit));
1708                                 cursor.pos(0);
1709                                 continue;
1710                         }
1711                         break;
1712                 }
1713
1714                 bool const is_good_inset = cpit->isInset(cpos)
1715                         && cpit->getInset(cpos)->allowSpellcheck();
1716
1717                 if (!isDeletedText(*cpit, cpos)
1718                     && (is_good_inset || cpit->isLetter(cpos)))
1719                         break;
1720
1721                 cursor.pos(cpos + 1);
1722         }
1723
1724         // now check if we hit an inset so it has to be a inset containing text!
1725         if (cursor.pos() < cursor.par()->size() &&
1726             cursor.par()->isInset(cursor.pos())) {
1727                 // lock the inset!
1728                 FuncRequest cmd(bv(), LFUN_INSET_EDIT, "left");
1729                 cursor.par()->getInset(cursor.pos())->localDispatch(cmd);
1730                 // now call us again to do the above trick
1731                 // but obviously we have to start from down below ;)
1732                 return bv()->text->selectNextWordToSpellcheck(value);
1733         }
1734
1735         // Update the value if we changed paragraphs
1736         if (cursor.par() != tmppit) {
1737                 setCursor(cursor.par(), cursor.pos());
1738                 value = float(cursor.y())/float(height);
1739         }
1740
1741         // Start the selection from here
1742         selection.cursor = cursor;
1743
1744         string lang_code = getFont(cursor.par(), cursor.pos()).language()->code();
1745         // and find the end of the word (insets like optional hyphens
1746         // and ligature break are part of a word)
1747         while (cursor.pos() < cursor.par()->size()
1748                && cursor.par()->isLetter(cursor.pos())
1749                && !isDeletedText(*cursor.par(), cursor.pos()))
1750                 cursor.pos(cursor.pos() + 1);
1751
1752         // Finally, we copy the word to a string and return it
1753         string str;
1754         if (selection.cursor.pos() < cursor.pos()) {
1755                 pos_type i;
1756                 for (i = selection.cursor.pos(); i < cursor.pos(); ++i) {
1757                         if (!cursor.par()->isInset(i))
1758                                 str += cursor.par()->getChar(i);
1759                 }
1760         }
1761         return WordLangTuple(str, lang_code);
1762 }
1763
1764
1765 // This one is also only for the spellchecker
1766 void LyXText::selectSelectedWord()
1767 {
1768         if (the_locking_inset) {
1769                 the_locking_inset->selectSelectedWord(bv());
1770                 return;
1771         }
1772         // move cursor to the beginning
1773         setCursor(selection.cursor.par(), selection.cursor.pos());
1774
1775         // set the sel cursor
1776         selection.cursor = cursor;
1777
1778         // now find the end of the word
1779         while (cursor.pos() < cursor.par()->size()
1780                && cursor.par()->isLetter(cursor.pos()))
1781                 cursor.pos(cursor.pos() + 1);
1782
1783         setCursor(cursor.par(), cursor.pos());
1784
1785         // finally set the selection
1786         setSelection();
1787 }
1788
1789
1790 // Delete from cursor up to the end of the current or next word.
1791 void LyXText::deleteWordForward()
1792 {
1793         if (cursor.par()->empty())
1794                 cursorRight(bv());
1795         else {
1796                 LyXCursor tmpcursor = cursor;
1797                 selection.set(true); // to avoid deletion
1798                 cursorRightOneWord();
1799                 setCursor(tmpcursor, tmpcursor.par(), tmpcursor.pos());
1800                 selection.cursor = cursor;
1801                 cursor = tmpcursor;
1802                 setSelection();
1803
1804                 // Great, CutSelection() gets rid of multiple spaces.
1805                 cutSelection(true, false);
1806         }
1807 }
1808
1809
1810 // Delete from cursor to start of current or prior word.
1811 void LyXText::deleteWordBackward()
1812 {
1813         if (cursor.par()->empty())
1814                 cursorLeft(bv());
1815         else {
1816                 LyXCursor tmpcursor = cursor;
1817                 selection.set(true); // to avoid deletion
1818                 cursorLeftOneWord();
1819                 setCursor(tmpcursor, tmpcursor.par(), tmpcursor.pos());
1820                 selection.cursor = cursor;
1821                 cursor = tmpcursor;
1822                 setSelection();
1823                 cutSelection(true, false);
1824         }
1825 }
1826
1827
1828 // Kill to end of line.
1829 void LyXText::deleteLineForward()
1830 {
1831         if (cursor.par()->empty())
1832                 // Paragraph is empty, so we just go to the right
1833                 cursorRight(bv());
1834         else {
1835                 LyXCursor tmpcursor = cursor;
1836                 // We can't store the row over a regular setCursor
1837                 // so we set it to 0 and reset it afterwards.
1838                 selection.set(true); // to avoid deletion
1839                 cursorEnd();
1840                 setCursor(tmpcursor, tmpcursor.par(), tmpcursor.pos());
1841                 selection.cursor = cursor;
1842                 cursor = tmpcursor;
1843                 setSelection();
1844                 // What is this test for ??? (JMarc)
1845                 if (!selection.set()) {
1846                         deleteWordForward();
1847                 } else {
1848                         cutSelection(true, false);
1849                 }
1850         }
1851 }
1852
1853
1854 void LyXText::changeCase(LyXText::TextCase action)
1855 {
1856         LyXCursor from;
1857         LyXCursor to;
1858
1859         if (selection.set()) {
1860                 from = selection.start;
1861                 to = selection.end;
1862         } else {
1863                 from = cursor;
1864                 ::getWord(from, to, lyx::PARTIAL_WORD, ownerParagraphs());
1865                 setCursor(to.par(), to.pos() + 1);
1866         }
1867
1868         recordUndo(bv(), Undo::ATOMIC, from.par(), to.par());
1869
1870         pos_type pos = from.pos();
1871         ParagraphList::iterator pit = from.par();
1872
1873         while (pit != ownerParagraphs().end() &&
1874                (pos != to.pos() || pit != to.par())) {
1875                 if (pos == pit->size()) {
1876                         ++pit;
1877                         pos = 0;
1878                         continue;
1879                 }
1880                 unsigned char c = pit->getChar(pos);
1881                 if (!IsInsetChar(c)) {
1882                         switch (action) {
1883                         case text_lowercase:
1884                                 c = lowercase(c);
1885                                 break;
1886                         case text_capitalization:
1887                                 c = uppercase(c);
1888                                 action = text_lowercase;
1889                                 break;
1890                         case text_uppercase:
1891                                 c = uppercase(c);
1892                                 break;
1893                         }
1894                 }
1895 #warning changes
1896                 pit->setChar(pos, c);
1897                 ++pos;
1898         }
1899 }
1900
1901
1902 void LyXText::Delete()
1903 {
1904         // this is a very easy implementation
1905
1906         LyXCursor old_cursor = cursor;
1907         int const old_cur_par_id = old_cursor.par()->id();
1908         int const old_cur_par_prev_id =
1909                 (old_cursor.par() != ownerParagraphs().begin() ?
1910                  boost::prior(old_cursor.par())->id() : -1);
1911
1912         // just move to the right
1913         cursorRight(bv());
1914
1915         // CHECK Look at the comment here.
1916         // This check is not very good...
1917         // The cursorRightIntern calls DeleteEmptyParagrapgMechanism
1918         // and that can very well delete the par or par->previous in
1919         // old_cursor. Will a solution where we compare paragraph id's
1920         //work better?
1921         if ((cursor.par() != ownerParagraphs().begin() ? boost::prior(cursor.par())->id() : -1)
1922             == old_cur_par_prev_id
1923             && cursor.par()->id() != old_cur_par_id) {
1924                 // delete-empty-paragraph-mechanism has done it
1925                 return;
1926         }
1927
1928         // if you had success make a backspace
1929         if (old_cursor.par() != cursor.par() || old_cursor.pos() != cursor.pos()) {
1930                 LyXCursor tmpcursor = cursor;
1931                 // to make sure undo gets the right cursor position
1932                 cursor = old_cursor;
1933                 recordUndo(bv(), Undo::DELETE, cursor.par());
1934                 cursor = tmpcursor;
1935                 backspace();
1936         }
1937 }
1938
1939
1940 void LyXText::backspace()
1941 {
1942         // Get the font that is used to calculate the baselineskip
1943         pos_type lastpos = cursor.par()->size();
1944
1945         if (cursor.pos() == 0) {
1946                 // The cursor is at the beginning of a paragraph,
1947                 // so the the backspace will collapse two paragraphs into one.
1948
1949                 // but it's not allowed unless it's new
1950                 if (cursor.par()->isChangeEdited(0, cursor.par()->size()))
1951                         return;
1952
1953                 // we may paste some paragraphs
1954
1955                 // is it an empty paragraph?
1956
1957                 if (lastpos == 0
1958                      || (lastpos == 1 && cursor.par()->isSeparator(0))) {
1959                         // This is an empty paragraph and we delete it just
1960                         // by moving the cursor one step
1961                         // left and let the DeleteEmptyParagraphMechanism
1962                         // handle the actual deletion of the paragraph.
1963
1964                         if (cursor.par() != ownerParagraphs().begin()) {
1965                                 ParagraphList::iterator tmppit = boost::prior(cursor.par());
1966                                 if (cursor.par()->layout() == tmppit->layout()
1967                                     && cursor.par()->getAlign() == tmppit->getAlign()) {
1968                                         // Inherit bottom DTD from the paragraph below.
1969                                         // (the one we are deleting)
1970                                         tmppit->params().lineBottom(cursor.par()->params().lineBottom());
1971                                         tmppit->params().spaceBottom(cursor.par()->params().spaceBottom());
1972                                         tmppit->params().pagebreakBottom(cursor.par()->params().pagebreakBottom());
1973                                 }
1974
1975                                 cursorLeft(bv());
1976                                 redoParagraph(cursor.par());
1977                                 return;
1978                         }
1979                 }
1980
1981                 if (cursor.par() != ownerParagraphs().begin()) {
1982                         recordUndo(bv(), Undo::DELETE,
1983                                 boost::prior(cursor.par()),
1984                                 cursor.par());
1985                 }
1986
1987                 ParagraphList::iterator tmppit = cursor.par();
1988                 // We used to do cursorLeftIntern() here, but it is
1989                 // not a good idea since it triggers the auto-delete
1990                 // mechanism. So we do a cursorLeftIntern()-lite,
1991                 // without the dreaded mechanism. (JMarc)
1992                 if (cursor.par() != ownerParagraphs().begin()) {
1993                         // steps into the above paragraph.
1994                         setCursorIntern(boost::prior(cursor.par()),
1995                                         boost::prior(cursor.par())->size(),
1996                                         false);
1997                 }
1998
1999                 // Pasting is not allowed, if the paragraphs have different
2000                 // layout. I think it is a real bug of all other
2001                 // word processors to allow it. It confuses the user.
2002                 //Correction: Pasting is always allowed with standard-layout
2003                 LyXTextClass const & tclass =
2004                         bv()->buffer()->params.getLyXTextClass();
2005
2006                 if (cursor.par() != tmppit
2007                     && (cursor.par()->layout() == tmppit->layout()
2008                         || tmppit->layout() == tclass.defaultLayout())
2009                     && cursor.par()->getAlign() == tmppit->getAlign()) {
2010                         mergeParagraph(bv()->buffer()->params,
2011                                 bv()->buffer()->paragraphs, cursor.par());
2012
2013                         if (cursor.pos() && cursor.par()->isSeparator(cursor.pos() - 1))
2014                                 cursor.pos(cursor.pos() - 1);
2015
2016                         // the row may have changed, block, hfills etc.
2017                         updateCounters();
2018                         setCursor(cursor.par(), cursor.pos(), false);
2019                 }
2020         } else {
2021                 // this is the code for a normal backspace, not pasting
2022                 // any paragraphs
2023                 recordUndo(bv(), Undo::DELETE, cursor.par());
2024                 // We used to do cursorLeftIntern() here, but it is
2025                 // not a good idea since it triggers the auto-delete
2026                 // mechanism. So we do a cursorLeftIntern()-lite,
2027                 // without the dreaded mechanism. (JMarc)
2028                 setCursorIntern(cursor.par(), cursor.pos() - 1,
2029                                 false, cursor.boundary());
2030                 cursor.par()->erase(cursor.pos());
2031         }
2032
2033         lastpos = cursor.par()->size();
2034         if (cursor.pos() == lastpos)
2035                 setCurrentFont();
2036
2037         redoParagraph();
2038         setCursor(cursor.par(), cursor.pos(), false, !cursor.boundary());
2039 }
2040
2041
2042 RowList::iterator LyXText::cursorRow() const
2043 {
2044         return getRow(cursor.par(), cursor.pos());
2045 }
2046
2047
2048 RowList::iterator LyXText::getRow(LyXCursor const & cur) const
2049 {
2050         return getRow(cur.par(), cur.pos());
2051 }
2052
2053
2054 RowList::iterator
2055 LyXText::getRow(ParagraphList::iterator pit, pos_type pos) const
2056 {
2057         RowList::iterator rit = pit->rows.begin();
2058         RowList::iterator end = pit->rows.end();
2059
2060 #warning Why is this next thing needed? (Andre)
2061         while (rit != end
2062                      && rit->pos() < pos
2063                      && boost::next(rit) != end
2064                      && boost::next(rit)->pos() <= pos)
2065                 ++rit;
2066
2067         return rit;
2068 }
2069
2070
2071 // returns pointer to a specified row
2072 RowList::iterator
2073 LyXText::getRow(ParagraphList::iterator pit, pos_type pos, int & y) const
2074 {
2075         y = 0;
2076
2077         if (noRows())
2078                 return firstRow();
2079
2080         ParagraphList::iterator it = ownerParagraphs().begin();
2081         for ( ; it != pit; ++it) {
2082                 RowList::iterator beg = it->rows.begin();
2083                 RowList::iterator end = it->rows.end();
2084                 for (RowList::iterator rit = beg; rit != end; ++rit)
2085                         y += rit->height();
2086         }
2087
2088         RowList::iterator rit = pit->rows.begin();
2089         RowList::iterator end = pit->rows.end();
2090         while (rit != end
2091                && rit->pos() < pos
2092                && boost::next(rit) != end
2093                && boost::next(rit)->pos() <= pos) {
2094                 y += rit->height();
2095                 ++rit;
2096         }
2097
2098         return rit;
2099 }
2100
2101
2102 // returns pointer to some fancy row 'below' specified row
2103 RowList::iterator LyXText::cursorIRow() const
2104 {
2105         int y = 0;
2106         return getRow(cursor.par(), cursor.pos(), y);
2107 }
2108
2109
2110 RowList::iterator LyXText::getRowNearY(int & y,
2111         ParagraphList::iterator & pit) const
2112 {
2113         //lyxerr << "getRowNearY: y " << y << endl;
2114         pit = ownerParagraphs().begin();
2115         RowList::iterator rit = firstRow();
2116         RowList::iterator rend = endRow();
2117
2118         for (; rit != rend; nextRow(pit, rit))
2119                 if (rit->y() > y)
2120                         break;
2121
2122         previousRow(pit, rit);
2123         y = rit->y();
2124         return rit;
2125 }
2126
2127
2128 int LyXText::getDepth() const
2129 {
2130         return cursor.par()->getDepth();
2131 }
2132
2133
2134 RowList::iterator LyXText::firstRow() const
2135 {
2136         return ownerParagraphs().front().rows.begin();
2137 }
2138
2139
2140 RowList::iterator LyXText::lastRow() const
2141 {
2142         return boost::prior(endRow());
2143 }
2144
2145
2146 RowList::iterator LyXText::endRow() const
2147 {
2148         return ownerParagraphs().back().rows.end();
2149 }
2150
2151
2152 void LyXText::nextRow(ParagraphList::iterator & pit,
2153         RowList::iterator & rit) const
2154 {
2155         ++rit;
2156         if (rit == pit->rows.end()) {
2157                 ++pit;
2158                 if (pit == ownerParagraphs().end())
2159                         --pit;
2160                 else
2161                         rit = pit->rows.begin();
2162         }
2163 }
2164
2165
2166 void LyXText::previousRow(ParagraphList::iterator & pit,
2167         RowList::iterator & rit) const
2168 {
2169         if (rit != pit->rows.begin())
2170                 --rit;
2171         else {
2172                 Assert(pit != ownerParagraphs().begin());
2173                 --pit;
2174                 rit = boost::prior(pit->rows.end());
2175         }
2176 }
2177
2178
2179 bool LyXText::noRows() const
2180 {
2181         return ownerParagraphs().begin()->rows.empty();
2182 }