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 #include <cstdlib>
  13 #include <cctype>
  14 #include <algorithm>
  15
  16 #include "lyxtext.h"
  17 #include "layout.h"
  18 #include "paragraph.h"
  19 #include "support/textutils.h"
  20 #include "support/LAssert.h"
  21 #include "support/lstrings.h"
  22 #include "insets/insetbib.h"
  23 #include "insets/insettext.h"
  24 #include "insets/insetspecialchar.h"
  25 #include "lyx_gui_misc.h"
  26 #include "gettext.h"
  27 #include "bufferparams.h"
  28 #include "buffer.h"
  29 #include "debug.h"
  30 #include "lyxrc.h"
  31 #include "LyXView.h"
  32 #include "Painter.h"
  33 #include "tracer.h"
  34 #include "font.h"
  35 #include "encoding.h"
  36 #include "lyxscreen.h"
  37 #include "bufferview_funcs.h"
  38 #include "BufferView.h"
  39 #include "language.h"
  40 #include "ParagraphParameters.h"
  41 #include "undo_funcs.h"
  42 #include "font.h"
  43
  44 using std::max;
  45 using std::min;
  46 using std::endl;
  47 using std::pair;
  48
  49 namespace {
  50
  51 int const LYX_PAPER_MARGIN = 20;
  52
  53 } // namespace anon
  54
  55 extern int bibitemMaxWidth(BufferView *, LyXFont const &);
  56
  57
  58 int LyXText::workWidth(BufferView * bview) const
  59 {
  60         if (inset_owner) {
  61                 return inset_owner->textWidth(bview);
  62         }
  63         return bview->workWidth();
  64 }
  65
  66
  67 int LyXText::getRealCursorX(BufferView * bview) const
  68 {
  69         int x = cursor.x();
  70         if (the_locking_inset && (the_locking_inset->getLyXText(bview)!=this))
  71                 x = the_locking_inset->getLyXText(bview)->getRealCursorX(bview);
  72         return x;
  73 }
  74
  75
  76 unsigned char LyXText::transformChar(unsigned char c, Paragraph * par,
  77                         Paragraph::size_type pos) const
  78 {
  79         if (!Encodings::is_arabic(c))
  80                 if (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 && isdigit(c))
  81                         return c + (0xb0 - '0');
  82                 else
  83                         return c;
  84
  85         unsigned char const prev_char = pos > 0 ? par->getChar(pos-1) : ' ';
  86         unsigned char next_char = ' ';
  87
  88         for (Paragraph::size_type i = pos+1; i < par->size(); ++i)
  89                 if (!Encodings::IsComposeChar_arabic(par->getChar(i))) {
  90                         next_char = par->getChar(i);
  91                         break;
  92                 }
  93
  94         if (Encodings::is_arabic(next_char)) {
  95                 if (Encodings::is_arabic(prev_char))
  96                         return Encodings::TransformChar(c, Encodings::FORM_MEDIAL);
  97                 else
  98                         return Encodings::TransformChar(c, Encodings::FORM_INITIAL);
  99         } else {
 100                 if (Encodings::is_arabic(prev_char))
 101                         return Encodings::TransformChar(c, Encodings::FORM_FINAL);
 102                 else
 103                         return Encodings::TransformChar(c, Encodings::FORM_ISOLATED);
 104         }
 105 }
 106
 107 // This is the comments that some of the warnings below refers to.
 108 // There are some issues in this file and I don't think they are
 109 // really related to the FIX_DOUBLE_SPACE patch. I'd rather think that
 110 // this is a problem that has been here almost from day one and that a
 111 // larger userbase with differenct access patters triggers the bad
 112 // behaviour. (segfaults.) What I think happen is: In several places
 113 // we store the paragraph in the current cursor and then moves the
 114 // cursor. This movement of the cursor will delete paragraph at the
 115 // old position if it is now empty. This will make the temporary
 116 // pointer to the old cursor paragraph invalid and dangerous to use.
 117 // And is some cases this will trigger a segfault. I have marked some
 118 // of the cases where this happens with a warning, but I am sure there
 119 // are others in this file and in text2.C. There is also a note in
 120 // Delete() that you should read. In Delete I store the paragraph->id
 121 // instead of a pointer to the paragraph. I am pretty sure this faulty
 122 // use of temporary pointers to paragraphs that might have gotten
 123 // invalidated (through a cursor movement) before they are used, are
 124 // the cause of the strange crashes we get reported often.
 125 //
 126 // It is very tiresom to change this code, especially when it is as
 127 // hard to read as it is. Help to fix all the cases where this is done
 128 // would be greately appreciated.
 129 //
 130 // Lgb
 131
 132 int LyXText::singleWidth(BufferView * bview, Paragraph * par,
 133                          Paragraph::size_type pos) const
 134 {
 135         char const c = par->getChar(pos);
 136         return singleWidth(bview, par, pos, c);
 137 }
 138
 139
 140 int LyXText::singleWidth(BufferView * bview, Paragraph * par,
 141                          Paragraph::size_type pos, char c) const
 142 {
 143         LyXFont const font = getFont(bview->buffer(), par, pos);
 144
 145         // The most common case is handled first (Asger)
 146         if (IsPrintable(c)) {
 147                 if (font.language()->RightToLeft()) {
 148                         if (font.language()->lang() == "arabic" &&
 149                             (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 150                              lyxrc.font_norm_type == LyXRC::ISO_10646_1))
 151                                 if (Encodings::IsComposeChar_arabic(c))
 152                                         return 0;
 153                                 else
 154                                         c = transformChar(c, par, pos);
 155                         else if (font.language()->lang() == "hebrew" &&
 156                                  Encodings::IsComposeChar_hebrew(c))
 157                                 return 0;
 158                 }
 159                 return lyxfont::width(c, font);
 160
 161         } else if (IsHfillChar(c)) {
 162                 return 3;       /* Because of the representation
 163                                  * as vertical lines */
 164         } else if (c == Paragraph::META_INSET) {
 165                 Inset * tmpinset = par->getInset(pos);
 166                 if (tmpinset) {
 167 #if 0 // seems not to be needed, but ...
 168                         tmpinset->update(bview, font);
 169 #endif
 170                         return tmpinset->width(bview, font);
 171                 } else
 172                         return 0;
 173
 174         } else if (IsSeparatorChar(c))
 175                 c = ' ';
 176         else if (IsNewlineChar(c))
 177                 c = 'n';
 178         return lyxfont::width(c, font);
 179 }
 180
 181
 182 // Returns the paragraph position of the last character in the specified row
 183 Paragraph::size_type LyXText::rowLast(Row const * row) const
 184 {
 185         if (row->next() == 0)
 186                 return row->par()->size() - 1;
 187         else if (row->next()->par() != row->par())
 188                 return row->par()->size() - 1;
 189         else
 190                 return row->next()->pos() - 1;
 191 }
 192
 193
 194 Paragraph::size_type LyXText::rowLastPrintable(Row const * row) const
 195 {
 196         Paragraph::size_type const last = rowLast(row);
 197         if (last >= row->pos()
 198             && row->next()
 199             && row->next()->par() == row->par()
 200             && row->par()->isSeparator(last))
 201                 return last - 1;
 202         else
 203                 return last;
 204 }
 205
 206
 207 void LyXText::computeBidiTables(Buffer const * buf, Row * row) const
 208 {
 209         bidi_same_direction = true;
 210         if (!lyxrc.rtl_support) {
 211                 bidi_start = -1;
 212                 return;
 213         }
 214
 215         bidi_start = row->pos();
 216         bidi_end = rowLastPrintable(row);
 217
 218         if (bidi_start > bidi_end) {
 219                 bidi_start = -1;
 220                 return;
 221         }
 222
 223         if (bidi_end + 2 - bidi_start >
 224             static_cast<Paragraph::size_type>(log2vis_list.size())) {
 225                 Paragraph::size_type new_size =
 226                         (bidi_end + 2 - bidi_start < 500) ?
 227                         500 : 2 * (bidi_end + 2 - bidi_start);
 228                 log2vis_list.resize(new_size);
 229                 vis2log_list.resize(new_size);
 230                 bidi_levels.resize(new_size);
 231         }
 232
 233         vis2log_list[bidi_end + 1 - bidi_start] = -1;
 234         log2vis_list[bidi_end + 1 - bidi_start] = -1;
 235
 236         Paragraph::size_type    stack[2];
 237         bool const rtl_par =
 238                 row->par()->getParLanguage(buf->params)->RightToLeft();
 239         int level = 0;
 240         bool rtl = false;
 241         bool rtl0 = false;
 242         Paragraph::size_type const main_body =
 243                 beginningOfMainBody(buf, row->par());
 244
 245         for (Paragraph::size_type lpos = bidi_start;
 246              lpos <= bidi_end; ++lpos) {
 247                 bool is_space = row->par()->isLineSeparator(lpos);
 248                 Paragraph::size_type const pos =
 249                         (is_space && lpos + 1 <= bidi_end &&
 250                          !row->par()->isLineSeparator(lpos + 1) &&
 251                          !row->par()->isNewline(lpos + 1))
 252                         ? lpos + 1 : lpos;
 253                 LyXFont font = row->par()->getFontSettings(buf->params, pos);
 254                 if (pos != lpos && 0 < lpos && rtl0 && font.isRightToLeft() &&
 255                     font.number() == LyXFont::ON &&
 256                     row->par()->getFontSettings(buf->params, lpos-1).number()
 257                     == LyXFont::ON) {
 258                         font = row->par()->getFontSettings(buf->params, lpos);
 259                         is_space = false;
 260                 }
 261
 262
 263                 bool new_rtl = font.isVisibleRightToLeft();
 264                 bool new_rtl0 = font.isRightToLeft();
 265                 int new_level;
 266
 267                 if (lpos == main_body - 1
 268                     && row->pos() < main_body - 1
 269                     && is_space) {
 270                         new_level = (rtl_par) ? 1 : 0;
 271                         new_rtl = new_rtl0 = rtl_par;
 272                 } else if (new_rtl0)
 273                         new_level = (new_rtl) ? 1 : 2;
 274                 else
 275                         new_level = (rtl_par) ? 2 : 0;
 276
 277                 if (is_space && new_level >= level) {
 278                         new_level = level;
 279                         new_rtl = rtl;
 280                         new_rtl0 = rtl0;
 281                 }
 282
 283                 int new_level2 = new_level;
 284
 285                 if (level == new_level && rtl0 != new_rtl0) {
 286                         --new_level2;
 287                         log2vis_list[lpos - bidi_start] = (rtl) ? 1 : -1;
 288                 } else if (level < new_level) {
 289                         log2vis_list[lpos - bidi_start] =  (rtl) ? -1 : 1;
 290                         if (new_level > rtl_par)
 291                                 bidi_same_direction = false;
 292                 } else
 293                         log2vis_list[lpos - bidi_start] = (new_rtl) ? -1 : 1;
 294                 rtl = new_rtl;
 295                 rtl0 = new_rtl0;
 296                 bidi_levels[lpos - bidi_start] = new_level;
 297
 298                 while (level > new_level2) {
 299                         Paragraph::size_type old_lpos =
 300                                 stack[--level];
 301                         int delta = lpos - old_lpos - 1;
 302                         if (level % 2)
 303                                 delta = -delta;
 304                         log2vis_list[lpos - bidi_start] += delta;
 305                         log2vis_list[old_lpos - bidi_start] += delta;
 306                 }
 307                 while (level < new_level)
 308                         stack[level++] = lpos;
 309         }
 310
 311         while (level > 0) {
 312                 Paragraph::size_type const old_lpos = stack[--level];
 313                 int delta = bidi_end - old_lpos;
 314                 if (level % 2)
 315                         delta = -delta;
 316                 log2vis_list[old_lpos - bidi_start] += delta;
 317         }
 318
 319         Paragraph::size_type vpos = bidi_start - 1;
 320         for (Paragraph::size_type lpos = bidi_start;
 321              lpos <= bidi_end; ++lpos) {
 322                 vpos += log2vis_list[lpos - bidi_start];
 323                 vis2log_list[vpos - bidi_start] = lpos;
 324                 log2vis_list[lpos - bidi_start] = vpos;
 325         }
 326 }
 327
 328
 329 // This method requires a previous call to ComputeBidiTables()
 330 bool LyXText::isBoundary(Buffer const * buf, Paragraph * par,
 331                          Paragraph::size_type pos) const
 332 {
 333         if (!lyxrc.rtl_support || pos == 0)
 334                 return false;
 335
 336         if (!bidi_InRange(pos - 1)) {
 337                 /// This can happen if pos is the first char of a row.
 338                 /// Returning false in this case is incorrect!
 339                 return false;
 340         }
 341
 342         bool const rtl = bidi_level(pos - 1) % 2;
 343         bool const rtl2 = bidi_InRange(pos)
 344                 ? bidi_level(pos) % 2
 345                 : par->isRightToLeftPar(buf->params);
 346         return rtl != rtl2;
 347 }
 348
 349
 350 bool LyXText::isBoundary(Buffer const * buf, Paragraph * par,
 351                          Paragraph::size_type pos,
 352                          LyXFont const & font) const
 353 {
 354         if (!lyxrc.rtl_support)
 355                 return false;    // This is just for speedup
 356
 357         bool const rtl = font.isVisibleRightToLeft();
 358         bool const rtl2 = bidi_InRange(pos)
 359                 ? bidi_level(pos) % 2
 360                 : par->isRightToLeftPar(buf->params);
 361         return rtl != rtl2;
 362 }
 363
 364
 365 void LyXText::draw(BufferView * bview, Row const * row,
 366                    Paragraph::size_type & vpos,
 367                    int offset, float & x, bool cleared)
 368 {
 369         Painter & pain = bview->painter();
 370
 371         Paragraph::size_type pos = vis2log(vpos);
 372         char c = row->par()->getChar(pos);
 373         float tmpx = x;
 374
 375         if (IsNewlineChar(c)) {
 376                 ++vpos;
 377                 // Draw end-of-line marker
 378                 LyXFont const font = getFont(bview->buffer(), row->par(), pos);
 379                 int const wid = lyxfont::width('n', font);
 380                 int const asc = lyxfont::maxAscent(font);
 381                 int const y = offset + row->baseline();
 382                 int xp[3];
 383                 int yp[3];
 384
 385                 if (bidi_level(pos) % 2 == 0) {
 386                         xp[0] = int(x + wid * 0.375);
 387                         yp[0] = int(y - 0.875 * asc * 0.75);
 388
 389                         xp[1] = int(x);
 390                         yp[1] = int(y - 0.500 * asc * 0.75);
 391
 392                         xp[2] = int(x + wid * 0.375);
 393                         yp[2] = int(y - 0.125 * asc * 0.75);
 394
 395                         pain.lines(xp, yp, 3, LColor::eolmarker);
 396
 397                         xp[0] = int(x);
 398                         yp[0] = int(y - 0.500 * asc * 0.75);
 399
 400                         xp[1] = int(x + wid);
 401                         yp[1] = int(y - 0.500 * asc * 0.75);
 402
 403                         xp[2] = int(x + wid);
 404                         yp[2] = int(y - asc * 0.75);
 405
 406                         pain.lines(xp, yp, 3, LColor::eolmarker);
 407                 } else {
 408                         xp[0] = int(x + wid * 0.625);
 409                         yp[0] = int(y - 0.875 * asc * 0.75);
 410
 411                         xp[1] = int(x + wid);
 412                         yp[1] = int(y - 0.500 * asc * 0.75);
 413
 414                         xp[2] = int(x + wid * 0.625);
 415                         yp[2] = int(y - 0.125 * asc * 0.75);
 416
 417                         pain.lines(xp, yp, 3, LColor::eolmarker);
 418
 419                         xp[0] = int(x + wid);
 420                         yp[0] = int(y - 0.500 * asc * 0.75);
 421
 422                         xp[1] = int(x);
 423                         yp[1] = int(y - 0.500 * asc * 0.75);
 424
 425                         xp[2] = int(x);
 426                         yp[2] = int(y - asc * 0.75);
 427
 428                         pain.lines(xp, yp, 3, LColor::eolmarker);
 429                 }
 430                 x += wid;
 431                 return;
 432         }
 433
 434         LyXFont font = getFont(bview->buffer(), row->par(), pos);
 435         LyXFont font2 = font;
 436
 437         if (c == Paragraph::META_INSET) {
 438                 Inset * tmpinset = row->par()->getInset(pos);
 439                 if (tmpinset) {
 440                         tmpinset->update(bview, font, false);
 441                         tmpinset->draw(bview, font, offset+row->baseline(), x,
 442                                        cleared);
 443 #ifdef SEEMS_TO_BE_NOT_NEEDED
 444                         if (status_ == CHANGED_IN_DRAW) {
 445                                 UpdateInset(bview, tmpinset);
 446                                 status(bview, CHANGED_IN_DRAW);
 447                         }
 448 #endif
 449                 }
 450                 ++vpos;
 451
 452                 if (lyxrc.mark_foreign_language &&
 453                         font.language() != ignore_language &&
 454                     font.language() != bview->buffer()->params.language) {
 455                         int const y = offset + row->height() - 1;
 456                         pain.line(int(tmpx), y, int(x), y, LColor::language);
 457                 }
 458
 459                 return;
 460         }
 461
 462         /* usual characters, no insets */
 463
 464         // Collect character that we can draw in one command
 465
 466         // This is dirty, but fast. Notice that it will never be too small.
 467         // For the record, I'll note that Microsoft Word has a limit
 468         // of 768 here. We have none :-) (Asger)
 469         // Ok. I am the first to admit that the use of std::string will be
 470         // a tiny bit slower than using a POD char array. However, I claim
 471         // that this slowdown is so small that it is close to inperceptive.
 472         // So IMHO we should go with the easier and clearer implementation.
 473         // And even if 1024 is a large number here it might overflow, string
 474         // will only overflow if the machine is out of memory...
 475         static string textstring;
 476         textstring = c;
 477         ++vpos;
 478
 479         Paragraph::size_type const last = rowLastPrintable(row);
 480
 481         if (font.language()->lang() == "hebrew") {
 482                 if (Encodings::IsComposeChar_hebrew(c)) {
 483                         int const width = lyxfont::width(c, font2);
 484                         int dx = 0;
 485                         for (Paragraph::size_type i = pos-1; i >= 0; --i) {
 486                                 c = row->par()->getChar(i);
 487                                 if (!Encodings::IsComposeChar_hebrew(c)) {
 488                                         if (IsPrintableNonspace(c)) {
 489                                                 int const width2 =
 490                                                         singleWidth(bview,
 491                                                                     row->par(),
 492                                                                     i, c);
 493                                                 dx = (c == 'ø' || c == 'ã') // dalet / resh
 494                                                         ? width2 - width : (width2 - width) / 2;
 495                                         }
 496                                         break;
 497                                 }
 498                         }
 499                         // Draw nikud
 500                         pain.text(int(x) + dx, offset + row->baseline(),
 501                                   textstring, font);
 502                 } else {
 503                         while (vpos <= last &&
 504                                (pos = vis2log(vpos)) >= 0
 505                                && IsPrintableNonspace(c = row->par()->getChar(pos))
 506                                && !Encodings::IsComposeChar_hebrew(c)
 507                                && font2 == getFont(bview->buffer(), row->par(), pos)) {
 508                                 textstring += c;
 509                                 ++vpos;
 510                         }
 511                         // Draw text and set the new x position
 512                         pain.text(int(x), offset + row->baseline(),
 513                                   textstring, font);
 514                         x += lyxfont::width(textstring, font);
 515                 }
 516         } else if (font.language()->lang() == "arabic" &&
 517                    (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 518                     lyxrc.font_norm_type == LyXRC::ISO_10646_1)) {
 519                 if (Encodings::IsComposeChar_arabic(c)) {
 520                         c = transformChar(c, row->par(), pos);
 521                         textstring = c;
 522                         int const width = lyxfont::width(c, font2);
 523                         int dx = 0;
 524                         for (Paragraph::size_type i = pos-1; i >= 0; --i) {
 525                                 c = row->par()->getChar(i);
 526                                 if (!Encodings::IsComposeChar_arabic(c)) {
 527                                         if (IsPrintableNonspace(c)) {
 528                                                 int const width2 =
 529                                                         singleWidth(bview,
 530                                                                     row->par(),
 531                                                                     i, c);
 532                                                 dx = (width2 - width) / 2;
 533                                         }
 534                                         break;
 535                                 }
 536                         }
 537                         // Draw nikud
 538                         pain.text(int(x) + dx, offset + row->baseline(),
 539                                   textstring, font);
 540                 } else {
 541                         textstring = transformChar(c, row->par(), pos);
 542                         while (vpos <= last &&
 543                                (pos = vis2log(vpos)) >= 0
 544                                && IsPrintableNonspace(c = row->par()->getChar(pos))
 545                                && !Encodings::IsComposeChar_arabic(c)
 546                                && font2 == getFont(bview->buffer(), row->par(), pos)) {
 547                                 c = transformChar(c, row->par(), pos);
 548                                 textstring += c;
 549                                 ++vpos;
 550                         }
 551                         // Draw text and set the new x position
 552                         pain.text(int(x), offset + row->baseline(),
 553                                   textstring, font);
 554                         x += lyxfont::width(textstring, font);
 555                 }
 556         } else {
 557                 while (vpos <= last &&
 558                        (pos = vis2log(vpos)) >= 0
 559                        && IsPrintableNonspace(c = row->par()->getChar(pos))
 560                        && font2 == getFont(bview->buffer(), row->par(), pos)) {
 561                         textstring += c;
 562                         ++vpos;
 563                 }
 564                 // Draw text and set the new x position
 565                 pain.text(int(x), offset + row->baseline(), textstring, font);
 566                 x += lyxfont::width(textstring, font);
 567         }
 568
 569 #ifdef WITH_WARNINGS
 570         if ((font.language() == inherit_language) ||
 571                 (font.language() == ignore_language))
 572                 lyxerr << "No this shouldn't happen!\n";
 573 #endif
 574         if (lyxrc.mark_foreign_language &&
 575             font.language() != bview->buffer()->params.language) {
 576                 int const y = offset + row->height() - 1;
 577                 pain.line(int(tmpx), y, int(x), y,
 578                           LColor::language);
 579         }
 580
 581         // If we want ulem.sty support, drawing
 582         // routines should go here. (Asger)
 583         // Why shouldn't LyXFont::drawText handle it internally?
 584 }
 585
 586
 587 // Returns the left beginning of the text.
 588 // This information cannot be taken from the layouts-objekt, because in
 589 // LaTeX the beginning of the text fits in some cases (for example sections)
 590 // exactly the label-width.
 591 int LyXText::leftMargin(BufferView * bview, Row const * row) const
 592 {
 593         LyXLayout const & layout =
 594                 textclasslist.Style(bview->buffer()->params.textclass,
 595                                     row->par()->getLayout());
 596
 597         string parindent = layout.parindent;
 598
 599         int x = LYX_PAPER_MARGIN;
 600
 601         x += lyxfont::signedWidth(textclasslist
 602                                   .TextClass(bview->buffer()->params.textclass)
 603                                   .leftmargin(),
 604                                   textclasslist
 605                                   .TextClass(bview->buffer()->params.textclass)
 606                                   .defaultfont());
 607
 608         // this is the way, LyX handles the LaTeX-Environments.
 609         // I have had this idea very late, so it seems to be a
 610         // later added hack and this is true
 611         if (!row->par()->getDepth()) {
 612                 if (!row->par()->getLayout()) {
 613                         // find the previous same level paragraph
 614                         if (row->par()->previous()) {
 615                                 Paragraph * newpar = row->par()
 616                                         ->depthHook(row->par()->getDepth());
 617                                 if (newpar &&
 618                                     textclasslist.Style(bview->buffer()->params.textclass,
 619                                                         newpar->getLayout())
 620                                     .nextnoindent)
 621                                         parindent.erase();
 622                         }
 623                 }
 624         } else {
 625                 // find the next level paragraph
 626
 627                 Paragraph * newpar =
 628                         row->par()->outerHook();
 629
 630                 // make a corresponding row. Needed to call LeftMargin()
 631
 632                 // check wether it is a sufficent paragraph
 633                 if (newpar
 634                     && textclasslist
 635                         .Style(bview->buffer()->params.textclass,
 636                                newpar->getLayout()).isEnvironment()) {
 637                         Row dummyrow;
 638                         dummyrow.par(newpar);
 639                         dummyrow.pos(newpar->size());
 640                         x = leftMargin(bview, &dummyrow);
 641                 } else {
 642                         // this is no longer an error, because this function
 643                         // is used to clear impossible depths after changing
 644                         // a layout. Since there is always a redo,
 645                         // LeftMargin() is always called
 646                         row->par()->params().depth(0);
 647                 }
 648
 649                 if (newpar && !row->par()->getLayout()) {
 650                         if (newpar->params().noindent())
 651                                 parindent.erase();
 652                         else
 653                                 parindent = textclasslist
 654                                         .Style(bview->buffer()->params.textclass,
 655                                                newpar->getLayout()).parindent;
 656                 }
 657
 658         }
 659
 660         LyXFont const labelfont = getFont(bview->buffer(), row->par(), -2);
 661         switch (layout.margintype) {
 662         case MARGIN_DYNAMIC:
 663                 if (!layout.leftmargin.empty()) {
 664                         x += lyxfont::signedWidth(layout.leftmargin,
 665                                                   textclasslist
 666                                                   .TextClass(bview->buffer()->params.
 667                                                              textclass)
 668                                                   .defaultfont());
 669                 }
 670                 if (!row->par()->getLabelstring().empty()) {
 671                         x += lyxfont::signedWidth(layout.labelindent,
 672                                                   labelfont);
 673                         x += lyxfont::width(row->par()->getLabelstring(),
 674                                             labelfont);
 675                         x += lyxfont::width(layout.labelsep, labelfont);
 676                 }
 677                 break;
 678         case MARGIN_MANUAL:
 679                 x += lyxfont::signedWidth(layout.labelindent, labelfont);
 680                 if (row->pos() >= beginningOfMainBody(bview->buffer(), row->par())) {
 681                         if (!row->par()->getLabelWidthString().empty()) {
 682                                 x += lyxfont::width(row->par()->getLabelWidthString(),
 683                                                labelfont);
 684                                 x += lyxfont::width(layout.labelsep, labelfont);
 685                         }
 686                 }
 687                 break;
 688         case MARGIN_STATIC:
 689                 x += lyxfont::signedWidth(layout.leftmargin, textclasslist.TextClass(bview->buffer()->params.textclass).defaultfont()) * 4
 690                         / (row->par()->getDepth() + 4);
 691                 break;
 692         case MARGIN_FIRST_DYNAMIC:
 693                 if (layout.labeltype == LABEL_MANUAL) {
 694                         if (row->pos() >= beginningOfMainBody(bview->buffer(), row->par())) {
 695                                 x += lyxfont::signedWidth(layout.leftmargin,
 696                                                           labelfont);
 697                         } else {
 698                                 x += lyxfont::signedWidth(layout.labelindent,
 699                                                           labelfont);
 700                         }
 701                 } else if (row->pos()
 702                            // Special case to fix problems with
 703                            // theorems (JMarc)
 704                            || (layout.labeltype == LABEL_STATIC
 705                                && layout.latextype == LATEX_ENVIRONMENT
 706                                && ! row->par()->isFirstInSequence())) {
 707                         x += lyxfont::signedWidth(layout.leftmargin,
 708                                                   labelfont);
 709                 } else if (layout.labeltype != LABEL_TOP_ENVIRONMENT
 710                            && layout.labeltype != LABEL_BIBLIO
 711                            && layout.labeltype !=
 712                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 713                         x += lyxfont::signedWidth(layout.labelindent,
 714                                                   labelfont);
 715                         x += lyxfont::width(layout.labelsep, labelfont);
 716                         x += lyxfont::width(row->par()->getLabelstring(),
 717                                             labelfont);
 718                 }
 719                 break;
 720
 721         case MARGIN_RIGHT_ADDRESS_BOX:
 722         {
 723                 // ok, a terrible hack. The left margin depends on the widest
 724                 // row in this paragraph. Do not care about footnotes, they
 725                 // are *NOT* allowed in the LaTeX realisation of this layout.
 726
 727                 // find the first row of this paragraph
 728                 Row const * tmprow = row;
 729                 while (tmprow->previous()
 730                        && tmprow->previous()->par() == row->par())
 731                         tmprow = tmprow->previous();
 732
 733                 int minfill = tmprow->fill();
 734                 while (tmprow->next() && tmprow->next()->par() == row->par()) {
 735                         tmprow = tmprow->next();
 736                         if (tmprow->fill() < minfill)
 737                                 minfill = tmprow->fill();
 738                 }
 739
 740                 x += lyxfont::signedWidth(layout.leftmargin,
 741                                           textclasslist
 742                                           .TextClass(bview->buffer()->params.textclass)
 743                                           .defaultfont());
 744                 x += minfill;
 745         }
 746         break;
 747         }
 748
 749         int align; // wrong type
 750
 751         if (row->par()->params().align() == LYX_ALIGN_LAYOUT)
 752                 align = layout.align;
 753         else
 754                 align = row->par()->params().align();
 755
 756         // set the correct parindent
 757         if (row->pos() == 0) {
 758                 if ((layout.labeltype == LABEL_NO_LABEL
 759                      || layout.labeltype == LABEL_TOP_ENVIRONMENT
 760                      || layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 761                      || (layout.labeltype == LABEL_STATIC
 762                          && layout.latextype == LATEX_ENVIRONMENT
 763                          && ! row->par()->isFirstInSequence()))
 764                     && align == LYX_ALIGN_BLOCK
 765                     && !row->par()->params().noindent()
 766                     && (row->par()->layout ||
 767                         bview->buffer()->params.paragraph_separation ==
 768                         BufferParams::PARSEP_INDENT))
 769                         x += lyxfont::signedWidth(parindent,
 770                                                   textclasslist
 771                                                   .TextClass(bview->buffer()->params
 772                                                              .textclass)
 773                                                   .defaultfont());
 774                 else if (layout.labeltype == LABEL_BIBLIO) {
 775                         // ale970405 Right width for bibitems
 776                         x += bibitemMaxWidth(bview,textclasslist
 777                                              .TextClass(bview->buffer()->params
 778                                                         .textclass)
 779                                              .defaultfont());
 780                 }
 781         }
 782         return x;
 783 }
 784
 785
 786 int LyXText::rightMargin(Buffer const * buf, Row const * row) const
 787 {
 788         LyXLayout const & layout =
 789                 textclasslist.Style(buf->params.textclass,
 790                                     row->par()->getLayout());
 791
 792         int x = LYX_PAPER_MARGIN
 793                 + lyxfont::signedWidth(textclasslist
 794                                        .TextClass(buf->params.textclass)
 795                                        .rightmargin(),
 796                                        textclasslist
 797                                        .TextClass(buf->params.textclass)
 798                                        .defaultfont());
 799
 800         // this is the way, LyX handles the LaTeX-Environments.
 801         // I have had this idea very late, so it seems to be a
 802         // later added hack and this is true
 803         if (row->par()->getDepth()) {
 804                 // find the next level paragraph
 805
 806                 Paragraph * newpar = row->par();
 807
 808                 do {
 809                         newpar = newpar->previous();
 810                 } while (newpar
 811                          && newpar->getDepth() >= row->par()->getDepth());
 812
 813                 // make a corresponding row. Needed to call LeftMargin()
 814
 815                 // check wether it is a sufficent paragraph
 816                 if (newpar
 817                     && textclasslist.Style(buf->params.textclass,
 818                                            newpar->getLayout())
 819                        .isEnvironment()) {
 820                         Row dummyrow;
 821                         dummyrow.par(newpar);
 822                         dummyrow.pos(0);
 823                         x = rightMargin(buf, &dummyrow);
 824                 } else {
 825                         // this is no longer an error, because this function
 826                         // is used to clear impossible depths after changing
 827                         // a layout. Since there is always a redo,
 828                         // LeftMargin() is always called
 829                         row->par()->params().depth(0);
 830                 }
 831         }
 832
 833         //lyxerr << "rightmargin: " << layout->rightmargin << endl;
 834         x += lyxfont::signedWidth(layout.rightmargin, textclasslist
 835                                   .TextClass(buf->params.textclass)
 836                                   .defaultfont()) * 4 / (row->par()->getDepth()
 837                                                          + 4);
 838         return x;
 839 }
 840
 841
 842 int LyXText::labelEnd(BufferView * bview, Row const * row) const
 843 {
 844         if (textclasslist.Style(bview->buffer()->params.textclass,
 845                                 row->par()->getLayout()).margintype
 846             == MARGIN_MANUAL) {
 847                 Row tmprow;
 848                 tmprow = *row;
 849                 tmprow.pos(row->par()->size());
 850                 return leftMargin(bview, &tmprow);  /* just the beginning
 851                                                 of the main body */
 852         } else
 853                 return 0;  /* LabelEnd is only needed, if the
 854                               layout fills a flushleft
 855                               label. */
 856 }
 857
 858
 859 // get the next breakpoint in a given paragraph
 860 Paragraph::size_type
 861 LyXText::nextBreakPoint(BufferView * bview, Row const * row, int width) const
 862 {
 863         Paragraph * par = row->par();
 864
 865         if (width < 0)
 866                 return par->size();
 867
 868         Paragraph::size_type const pos = row->pos();
 869
 870
 871         // position of the last possible breakpoint
 872         // -1 isn't a suitable value, but a flag
 873         Paragraph::size_type last_separator = -1;
 874         width -= rightMargin(bview->buffer(), row);
 875
 876         Paragraph::size_type const main_body =
 877                 beginningOfMainBody(bview->buffer(), par);
 878         LyXLayout const & layout =
 879                 textclasslist.Style(bview->buffer()->params.textclass, par->getLayout());
 880         Paragraph::size_type i = pos;
 881
 882         if (layout.margintype == MARGIN_RIGHT_ADDRESS_BOX) {
 883                 /* special code for right address boxes, only newlines count */
 884                 while (i < par->size()) {
 885                         if (par->isNewline(i)) {
 886                                 last_separator = i;
 887                                 i = par->size() - 1; // this means break
 888                                 //x = width;
 889                         } else if (par->getChar(i) == Paragraph::META_INSET &&
 890                                    par->getInset(i) && par->getInset(i)->display()){
 891                                 par->getInset(i)->display(false);
 892                         }
 893                         ++i;
 894                 }
 895         } else {
 896                 // Last position is an invariant
 897                 Paragraph::size_type const last =
 898                         par->size();
 899                 // this is the usual handling
 900                 int x = leftMargin(bview, row);
 901                 bool doitonetime = true;
 902                 while (doitonetime || ((x < width) && (i < last))) {
 903                         doitonetime = false;
 904                         char const c = par->getChar(i);
 905                         if (IsNewlineChar(c)) {
 906                                 last_separator = i;
 907                                 x = width; // this means break
 908                         } else if (c == Paragraph::META_INSET &&
 909                                    par->getInset(i)) {
 910
 911                                 // check wether a Display() inset is
 912                                 // valid here. if not, change it to
 913                                 // non-display
 914                                 if (par->getInset(i)->display() &&
 915                                     (layout.isCommand() ||
 916                                      (layout.labeltype == LABEL_MANUAL
 917                                       && i < beginningOfMainBody(bview->buffer(), par)))) {
 918                                         // display istn't allowd
 919                                         par->getInset(i)->display(false);
 920                                         x += singleWidth(bview, par, i, c);
 921                                 } else if (par->getInset(i)->display() ||
 922                                          par->getInset(i)->needFullRow()) {
 923                                         // So break the line here
 924                                         if (i == pos) {
 925                                                 if (pos < last-1) {
 926                                                         last_separator = i;
 927                                                         if (IsLineSeparatorChar(par->getChar(i+1)))
 928                                                                 ++last_separator;
 929                                                 } else
 930                                                         last_separator = last; // to avoid extra rows
 931                                         } else
 932                                                 last_separator = i - 1;
 933                                         x = width;  // this means break
 934                                 } else {
 935                                         x += singleWidth(bview, par, i, c);
 936                                 }
 937                         } else  {
 938                                 if (IsLineSeparatorChar(c))
 939                                         last_separator = i;
 940                                 x += singleWidth(bview, par, i, c);
 941                         }
 942                         ++i;
 943                         if (i == main_body) {
 944                                 x += lyxfont::width(layout.labelsep,
 945                                                     getFont(bview->buffer(), par, -2));
 946                                 if (par->isLineSeparator(i - 1))
 947                                         x-= singleWidth(bview, par, i - 1);
 948                                 int left_margin = labelEnd(bview, row);
 949                                 if (x < left_margin)
 950                                         x = left_margin;
 951                         }
 952                 }
 953                 // end of paragraph is always a suitable separator
 954                 if (i == last && x < width)
 955                         last_separator = i;
 956         }
 957
 958         // well, if last_separator is still 0, the line isn't breakable.
 959         // don't care and cut simply at the end
 960         if (last_separator < 0) {
 961                 last_separator = i;
 962         }
 963
 964         // manual labels cannot be broken in LaTeX, do not care
 965         if (main_body && last_separator < main_body)
 966                 last_separator = main_body - 1;
 967
 968         return last_separator;
 969 }
 970
 971
 972 // returns the minimum space a row needs on the screen in pixel
 973 int LyXText::fill(BufferView * bview, Row * row, int paper_width) const
 974 {
 975         if (paper_width < 0)
 976                 return 20;
 977
 978         int w;
 979         // get the pure distance
 980         Paragraph::size_type const last = rowLastPrintable(row);
 981
 982         // special handling of the right address boxes
 983         if (textclasslist.Style(bview->buffer()->params.textclass,
 984                                 row->par()->getLayout()).margintype
 985             == MARGIN_RIGHT_ADDRESS_BOX) {
 986                 int const tmpfill = row->fill();
 987                 row->fill(0); // the minfill in MarginLeft()
 988                 w = leftMargin(bview, row);
 989                 row->fill(tmpfill);
 990         } else
 991                 w = leftMargin(bview, row);
 992
 993         LyXLayout const & layout = textclasslist.Style(bview->buffer()->params.textclass,
 994                                                        row->par()->getLayout());
 995         Paragraph::size_type const main_body =
 996                 beginningOfMainBody(bview->buffer(), row->par());
 997         Paragraph::size_type i = row->pos();
 998
 999         while (i <= last) {
1000                 if (main_body > 0 && i == main_body) {
1001                         w += lyxfont::width(layout.labelsep, getFont(bview->buffer(), row->par(), -2));
1002                         if (row->par()->isLineSeparator(i - 1))
1003                                 w -= singleWidth(bview, row->par(), i - 1);
1004                         int left_margin = labelEnd(bview, row);
1005                         if (w < left_margin)
1006                                 w = left_margin;
1007                 }
1008                 w += singleWidth(bview, row->par(), i);
1009                 ++i;
1010         }
1011         if (main_body > 0 && main_body > last) {
1012                 w += lyxfont::width(layout.labelsep, getFont(bview->buffer(), row->par(), -2));
1013                 if (last >= 0 && row->par()->isLineSeparator(last))
1014                         w -= singleWidth(bview, row->par(), last);
1015                 int const left_margin = labelEnd(bview, row);
1016                 if (w < left_margin)
1017                         w = left_margin;
1018         }
1019
1020         int const fill = paper_width - w - rightMargin(bview->buffer(), row);
1021 #ifdef WITH_WARNINGS
1022 #warning Please fix me (Jug!)
1023 #endif
1024 #if 0
1025         if (fill < 0)
1026                 return 0;
1027 #endif
1028         return fill;
1029 }
1030
1031
1032 // returns the minimum space a manual label needs on the screen in pixel
1033 int LyXText::labelFill(BufferView * bview, Row const * row) const
1034 {
1035         Paragraph::size_type last = beginningOfMainBody(bview->buffer(), row->par()) - 1;
1036         // -1 because a label ends either with a space that is in the label,
1037         // or with the beginning of a footnote that is outside the label.
1038
1039         // I don't understand this code in depth, but sometimes "last" is
1040         // less than 0 and this causes a crash. This fix seems to work
1041         // correctly, but I bet the real error is elsewhere.  The bug is
1042         // triggered when you have an open footnote in a paragraph
1043         // environment with a manual label. (Asger)
1044         if (last < 0) last = 0;
1045
1046         if (row->par()->isLineSeparator(last)) /* a sepearator at this end
1047                                                 does not count */
1048                 --last;
1049
1050         int w = 0;
1051         int i = row->pos();
1052         while (i <= last) {
1053                 w += singleWidth(bview, row->par(), i);
1054                 ++i;
1055         }
1056
1057         int fill = 0;
1058         if (!row->par()->params().labelWidthString().empty()) {
1059                 fill = max(lyxfont::width(row->par()->params().labelWidthString(),
1060                                           getFont(bview->buffer(), row->par(), -2)) - w,
1061                            0);
1062         }
1063
1064         return fill;
1065 }
1066
1067
1068 // returns the number of separators in the specified row. The separator
1069 // on the very last column doesnt count
1070 int LyXText::numberOfSeparators(Buffer const * buf, Row const * row) const
1071 {
1072         Paragraph::size_type const last = rowLast(row);
1073         Paragraph::size_type p =
1074                 max(row->pos(), beginningOfMainBody(buf, row->par()));
1075         int n = 0;
1076         for (; p < last; ++p) {
1077                 if (row->par()->isSeparator(p)) {
1078                         ++n;
1079                 }
1080         }
1081         return n;
1082 }
1083
1084
1085 // returns the number of hfills in the specified row. The LyX-Hfill is
1086 // a LaTeX \hfill so that the hfills at the beginning and at the end were
1087 // ignored. This is *MUCH* more usefull than not to ignore!
1088 int LyXText::numberOfHfills(Buffer const * buf, Row const * row) const
1089 {
1090         Paragraph::size_type const last = rowLast(row);
1091         Paragraph::size_type first = row->pos();
1092         if (first) { /* hfill *DO* count at the beginning
1093                       * of paragraphs! */
1094                 while(first <= last && row->par()->isHfill(first))
1095                         ++first;
1096         }
1097
1098         first = max(first, beginningOfMainBody(buf, row->par()));
1099         int n = 0;
1100         for (int p = first; p <= last; ++p) { // last, because the end is ignored!
1101                 if (row->par()->isHfill(p)) {
1102                         ++n;
1103                 }
1104         }
1105         return n;
1106 }
1107
1108
1109 // like NumberOfHfills, but only those in the manual label!
1110 int LyXText::numberOfLabelHfills(Buffer const * buf, Row const * row) const
1111 {
1112         Paragraph::size_type last = rowLast(row);
1113         Paragraph::size_type first = row->pos();
1114         if (first) { /* hfill *DO* count at the beginning
1115                       * of paragraphs! */
1116                 while(first < last && row->par()->isHfill(first))
1117                         ++first;
1118         }
1119
1120         last = min(last, beginningOfMainBody(buf, row->par()));
1121         int n = 0;
1122         for (Paragraph::size_type p = first;
1123              p < last; ++p) {  // last, because the end is ignored!
1124                 if (row->par()->isHfill(p)) {
1125                         ++n;
1126                 }
1127         }
1128         return n;
1129 }
1130
1131
1132 // returns true, if a expansion is needed.
1133 // Rules are given by LaTeX
1134 bool LyXText::hfillExpansion(Buffer const * buf, Row const * row_ptr,
1135                              Paragraph::size_type pos) const
1136 {
1137         // by the way, is it a hfill?
1138         if (!row_ptr->par()->isHfill(pos))
1139                 return false;
1140
1141         // at the end of a row it does not count
1142         if (pos >= rowLast(row_ptr))
1143                 return false;
1144
1145         // at the beginning of a row it does not count, if it is not
1146         // the first row of a paragaph
1147         if (!row_ptr->pos())
1148                 return true;
1149
1150         // in some labels  it does not count
1151         if (textclasslist.Style(buf->params.textclass,
1152                                 row_ptr->par()->getLayout()).margintype
1153             != MARGIN_MANUAL
1154             && pos < beginningOfMainBody(buf, row_ptr->par()))
1155                 return false;
1156
1157         // if there is anything between the first char of the row and
1158         // the sepcified position that is not a newline and not a hfill,
1159         // the hfill will count, otherwise not
1160         Paragraph::size_type i = row_ptr->pos();
1161         while (i < pos && (row_ptr->par()->isNewline(i)
1162                            || row_ptr->par()->isHfill(i)))
1163                 ++i;
1164
1165         return i != pos;
1166 }
1167
1168
1169 LColor::color LyXText::backgroundColor()
1170 {
1171         if (inset_owner)
1172                 return inset_owner->backgroundColor();
1173         else
1174                 return LColor::background;
1175 }
1176
1177 void LyXText::setHeightOfRow(BufferView * bview, Row * row_ptr) const
1178 {
1179     /* get the maximum ascent and the maximum descent */
1180         int asc = 0;
1181         int desc = 0;
1182         float layoutasc = 0;
1183         float layoutdesc = 0;
1184         float tmptop = 0;
1185         LyXFont tmpfont;
1186         Inset * tmpinset = 0;
1187
1188         /* this must not happen before the currentrow for clear reasons.
1189            so the trick is just to set the current row onto this row */
1190         int unused_y;
1191         getRow(row_ptr->par(), row_ptr->pos(), unused_y);
1192
1193         /* ok , let us initialize the maxasc and maxdesc value.
1194          * This depends in LaTeX of the font of the last character
1195          * in the paragraph. The hack below is necessary because
1196          * of the possibility of open footnotes */
1197
1198         /* Correction: only the fontsize count. The other properties
1199            are taken from the layoutfont. Nicer on the screen :) */
1200         Paragraph * par = row_ptr->par();
1201         Paragraph * firstpar = row_ptr->par();
1202
1203         LyXLayout const & layout = textclasslist.Style(bview->buffer()->params.textclass,
1204                                                        firstpar->getLayout());
1205
1206         LyXFont font = getFont(bview->buffer(), par, par->size() - 1);
1207         LyXFont::FONT_SIZE const size = font.size();
1208         font = getFont(bview->buffer(), par, -1);
1209         font.setSize(size);
1210
1211         LyXFont labelfont = getFont(bview->buffer(), par, -2);
1212
1213         float spacing_val = 1.0;
1214         if (!row_ptr->par()->params().spacing().isDefault()) {
1215                 spacing_val = row_ptr->par()->params().spacing().getValue();
1216         } else {
1217                 spacing_val = bview->buffer()->params.spacing.getValue();
1218         }
1219         //lyxerr << "spacing_val = " << spacing_val << endl;
1220
1221         int maxasc = int(lyxfont::maxAscent(font) *
1222                          layout.spacing.getValue() *
1223                          spacing_val);
1224         int maxdesc = int(lyxfont::maxDescent(font) *
1225                           layout.spacing.getValue() *
1226                           spacing_val);
1227         int const pos_end = rowLast(row_ptr);
1228         int labeladdon = 0;
1229         int maxwidth = 0;
1230
1231         // Check if any insets are larger
1232         for (int pos = row_ptr->pos(); pos <= pos_end; ++pos) {
1233                 if (row_ptr->par()->getChar(pos) == Paragraph::META_INSET) {
1234                         tmpfont = getFont(bview->buffer(), row_ptr->par(), pos);
1235                         tmpinset = row_ptr->par()->getInset(pos);
1236                         if (tmpinset) {
1237 #if 1 // this is needed for deep update on initialitation
1238                                 tmpinset->update(bview, tmpfont);
1239 #endif
1240                                 asc = tmpinset->ascent(bview, tmpfont);
1241                                 desc = tmpinset->descent(bview, tmpfont);
1242                                 maxwidth += tmpinset->width(bview, tmpfont);
1243                                 maxasc = max(maxasc, asc);
1244                                 maxdesc = max(maxdesc, desc);
1245                         }
1246                 } else {
1247                         maxwidth += singleWidth(bview, row_ptr->par(), pos);
1248                 }
1249         }
1250
1251         // Check if any custom fonts are larger (Asger)
1252         // This is not completely correct, but we can live with the small,
1253         // cosmetic error for now.
1254         LyXFont::FONT_SIZE const maxsize =
1255                 row_ptr->par()->highestFontInRange(row_ptr->pos(), pos_end);
1256         if (maxsize > font.size()) {
1257                 font.setSize(maxsize);
1258
1259                 asc = lyxfont::maxAscent(font);
1260                 desc = lyxfont::maxDescent(font);
1261                 if (asc > maxasc)
1262                         maxasc = asc;
1263                 if (desc > maxdesc)
1264                         maxdesc = desc;
1265         }
1266
1267         // This is nicer with box insets:
1268         ++maxasc;
1269         ++maxdesc;
1270
1271         row_ptr->ascent_of_text(maxasc);
1272
1273         // is it a top line?
1274         if (!row_ptr->pos() && (row_ptr->par() == firstpar)) {
1275
1276                 // some parksips VERY EASY IMPLEMENTATION
1277                 if (bview->buffer()->params.paragraph_separation ==
1278                         BufferParams::PARSEP_SKIP)
1279                 {
1280                         if (layout.isParagraph()
1281                                 && firstpar->getDepth() == 0
1282                                 && firstpar->previous())
1283                         {
1284                                 maxasc += bview->buffer()->params.getDefSkip().inPixels(bview);
1285                         } else if (firstpar->previous() &&
1286                                    textclasslist.Style(bview->buffer()->params.textclass,
1287                                                        firstpar->previous()->
1288                                                        getLayout()).isParagraph() &&
1289                                    firstpar->previous()->getDepth() == 0)
1290                         {
1291                                 // is it right to use defskip here too? (AS)
1292                                 maxasc += bview->buffer()->params.getDefSkip().inPixels(bview);
1293                         }
1294                 }
1295
1296                 // the paper margins
1297                 if (!row_ptr->par()->previous() && bv_owner)
1298                         maxasc += LYX_PAPER_MARGIN;
1299
1300                 // add the vertical spaces, that the user added
1301                 if (firstpar->params().spaceTop().kind() != VSpace::NONE)
1302                         maxasc += int(firstpar->params().spaceTop().inPixels(bview));
1303
1304                 // do not forget the DTP-lines!
1305                 // there height depends on the font of the nearest character
1306                 if (firstpar->params().lineTop())
1307                         maxasc += 2 * lyxfont::ascent('x', getFont(bview->buffer(),
1308                                                                    firstpar, 0));
1309
1310                 // and now the pagebreaks
1311                 if (firstpar->params().pagebreakTop())
1312                         maxasc += 3 * defaultHeight();
1313
1314                 // This is special code for the chapter, since the label of this
1315                 // layout is printed in an extra row
1316                 if (layout.labeltype == LABEL_COUNTER_CHAPTER
1317                         && bview->buffer()->params.secnumdepth >= 0)
1318                 {
1319                         float spacing_val = 1.0;
1320                         if (!row_ptr->par()->params().spacing().isDefault()) {
1321                                 spacing_val = row_ptr->par()->params().spacing().getValue();
1322                         } else {
1323                                 spacing_val = bview->buffer()->params.spacing.getValue();
1324                         }
1325
1326                         labeladdon = int(lyxfont::maxDescent(labelfont) *
1327                                          layout.spacing.getValue() *
1328                                          spacing_val)
1329                                 + int(lyxfont::maxAscent(labelfont) *
1330                                       layout.spacing.getValue() *
1331                                       spacing_val);
1332                 }
1333
1334                 // special code for the top label
1335                 if ((layout.labeltype == LABEL_TOP_ENVIRONMENT
1336                      || layout.labeltype == LABEL_BIBLIO
1337                      || layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
1338                     && row_ptr->par()->isFirstInSequence()
1339                     && !row_ptr->par()->getLabelstring().empty())
1340                 {
1341                         float spacing_val = 1.0;
1342                         if (!row_ptr->par()->params().spacing().isDefault()) {
1343                                 spacing_val = row_ptr->par()->params().spacing().getValue();
1344                         } else {
1345                                 spacing_val = bview->buffer()->params.spacing.getValue();
1346                         }
1347
1348                         labeladdon = int(
1349                                 (lyxfont::maxAscent(labelfont) *
1350                                  layout.spacing.getValue() *
1351                                  spacing_val)
1352                                 +(lyxfont::maxDescent(labelfont) *
1353                                   layout.spacing.getValue() *
1354                                   spacing_val)
1355                                 + layout.topsep * defaultHeight()
1356                                 + layout.labelbottomsep *  defaultHeight());
1357                 }
1358
1359                 // and now the layout spaces, for example before and after a section,
1360                 // or between the items of a itemize or enumerate environment
1361
1362                 if (!firstpar->params().pagebreakTop()) {
1363                         Paragraph * prev = row_ptr->par()->previous();
1364                         if (prev)
1365                                 prev = row_ptr->par()->depthHook(row_ptr->par()->getDepth());
1366                         if (prev && prev->getLayout() == firstpar->getLayout() &&
1367                                 prev->getDepth() == firstpar->getDepth() &&
1368                                 prev->getLabelWidthString() == firstpar->getLabelWidthString())
1369                         {
1370                                 layoutasc = (layout.itemsep * defaultHeight());
1371                         } else if (row_ptr->previous()) {
1372                                 tmptop = layout.topsep;
1373
1374                                 if (row_ptr->previous()->par()->getDepth() >= row_ptr->par()->getDepth())
1375                                         tmptop -= textclasslist.Style(bview->buffer()->params.textclass,
1376                                                                       row_ptr->previous()->par()->
1377                                                                       getLayout()).bottomsep;
1378
1379                                 if (tmptop > 0)
1380                                         layoutasc = (tmptop * defaultHeight());
1381                         } else if (row_ptr->par()->params().lineTop()) {
1382                                 tmptop = layout.topsep;
1383
1384                                 if (tmptop > 0)
1385                                         layoutasc = (tmptop * defaultHeight());
1386                         }
1387
1388                         prev = row_ptr->par()->outerHook();
1389                         if (prev)  {
1390                                 maxasc += int(textclasslist.Style(bview->buffer()->params.textclass,
1391                                               prev->getLayout()).parsep * defaultHeight());
1392                         } else {
1393                                 if (firstpar->previous() &&
1394                                         firstpar->previous()->getDepth() == 0 &&
1395                                         firstpar->previous()->getLayout() !=
1396                                         firstpar->getLayout())
1397                                 {
1398                                         // avoid parsep
1399                                 } else if (firstpar->previous()) {
1400                                         maxasc += int(layout.parsep * defaultHeight());
1401                                 }
1402                         }
1403                 }
1404         }
1405
1406         // is it a bottom line?
1407         if (row_ptr->par() == par
1408                 && (!row_ptr->next() || row_ptr->next()->par() != row_ptr->par()))
1409         {
1410                 // the paper margins
1411                 if (!par->next() && bv_owner)
1412                         maxdesc += LYX_PAPER_MARGIN;
1413
1414                 // add the vertical spaces, that the user added
1415                 if (firstpar->params().spaceBottom().kind() != VSpace::NONE)
1416                         maxdesc += int(firstpar->params().spaceBottom().inPixels(bview));
1417
1418                 // do not forget the DTP-lines!
1419                 // there height depends on the font of the nearest character
1420                 if (firstpar->params().lineBottom())
1421                         maxdesc += 2 * lyxfont::ascent('x',
1422                                                        getFont(bview->buffer(),
1423                                                        par, par->size() - 1));
1424
1425                 // and now the pagebreaks
1426                 if (firstpar->params().pagebreakBottom())
1427                         maxdesc += 3 * defaultHeight();
1428
1429                 // and now the layout spaces, for example before and after
1430                 // a section, or between the items of a itemize or enumerate
1431                 // environment
1432                 if (!firstpar->params().pagebreakBottom() && row_ptr->par()->next()) {
1433                         Paragraph * nextpar = row_ptr->par()->next();
1434                         Paragraph * comparepar = row_ptr->par();
1435                         float usual = 0;
1436                         float unusual = 0;
1437
1438                         if (comparepar->getDepth() > nextpar->getDepth()) {
1439                                 usual = (textclasslist.Style(bview->buffer()->params.textclass,
1440                                          comparepar->getLayout()).bottomsep * defaultHeight());
1441                                 comparepar = comparepar->depthHook(nextpar->getDepth());
1442                                 if (comparepar->getLayout()!= nextpar->getLayout()
1443                                         || nextpar->getLabelWidthString() !=
1444                                         comparepar->getLabelWidthString())
1445                                 {
1446                                         unusual = (textclasslist.Style(bview->buffer()->params.textclass,
1447                                                    comparepar->getLayout()).bottomsep * defaultHeight());
1448                                 }
1449                                 if (unusual > usual)
1450                                         layoutdesc = unusual;
1451                                 else
1452                                         layoutdesc = usual;
1453                         } else if (comparepar->getDepth() ==  nextpar->getDepth()) {
1454
1455                                 if (comparepar->getLayout()!= nextpar->getLayout()
1456                                         || nextpar->getLabelWidthString() !=
1457                                         comparepar->getLabelWidthString())
1458                                         layoutdesc = int(textclasslist.Style(bview->buffer()->params.textclass,
1459                                                                                                                  comparepar->getLayout()).bottomsep * defaultHeight());
1460                         }
1461                 }
1462         }
1463
1464         // incalculate the layout spaces
1465         maxasc += int(layoutasc * 2 / (2 + firstpar->getDepth()));
1466         maxdesc += int(layoutdesc * 2 / (2 + firstpar->getDepth()));
1467
1468         // calculate the new height of the text
1469         height -= row_ptr->height();
1470
1471         row_ptr->height(maxasc + maxdesc + labeladdon);
1472         row_ptr->baseline(maxasc + labeladdon);
1473
1474         height += row_ptr->height();
1475         float x;
1476         float dummy;
1477         prepareToPrint(bview, row_ptr, x, dummy, dummy, dummy, false);
1478         row_ptr->width(int(maxwidth + x));
1479         if (inset_owner) {
1480                 Row * r = firstrow;
1481                 width = max(0,workWidth(bview));
1482                 while(r) {
1483                         if (r->width() > width)
1484                                 width = r->width();
1485                         r = r->next();
1486                 }
1487         }
1488 }
1489
1490
1491 /* Appends the implicit specified paragraph behind the specified row,
1492  * start at the implicit given position */
1493 void LyXText::appendParagraph(BufferView * bview, Row * row) const
1494 {
1495    bool not_ready = true;
1496
1497    // The last character position of a paragraph is an invariant so we can
1498    // safely get it here. (Asger)
1499    int const lastposition = row->par()->size();
1500    do {
1501       // Get the next breakpoint
1502       int z = nextBreakPoint(bview, row, workWidth(bview));
1503
1504       Row * tmprow = row;
1505
1506       // Insert the new row
1507       if (z < lastposition) {
1508          ++z;
1509          insertRow(row, row->par(), z);
1510          row = row->next();
1511
1512          row->height(0);
1513       } else
1514          not_ready = false;
1515
1516       // Set the dimensions of the row
1517 #ifdef WITH_WARNINGS
1518 #warning Something is rotten here! (Jug)
1519 #endif
1520       tmprow->fill(fill(bview, tmprow, workWidth(bview)));
1521       setHeightOfRow(bview, tmprow);
1522
1523    } while (not_ready);
1524 }
1525
1526
1527 void LyXText::breakAgain(BufferView * bview, Row * row) const
1528 {
1529         bool not_ready = true;
1530
1531         do  {
1532                 // get the next breakpoint
1533                 Paragraph::size_type z = nextBreakPoint(bview, row, workWidth(bview));
1534                 Row * tmprow = row;
1535
1536                 if (z < row->par()->size()) {
1537                         if (!row->next() || (row->next() && row->next()->par() != row->par())) {
1538                                 // insert a new row
1539                                 ++z;
1540                                 insertRow(row, row->par(), z);
1541                                 row = row->next();
1542                                 row->height(0);
1543                         } else  {
1544                                 row = row->next();
1545                                 ++z;
1546                                 if (row->pos() == z)
1547                                         not_ready = false;     // the rest will not change
1548                                 else {
1549                                         row->pos(z);
1550                                 }
1551                         }
1552                 } else {
1553                         /* if there are some rows too much, delete them */
1554                         /* only if you broke the whole paragraph! */
1555                         Row * tmprow2 = row;
1556                         while (tmprow2->next() && tmprow2->next()->par() == row->par()) {
1557                                 tmprow2 = tmprow2->next();
1558                         }
1559                         while (tmprow2 != row) {
1560                                 tmprow2 = tmprow2->previous();
1561                                 removeRow(tmprow2->next());
1562                         }
1563                         not_ready = false;
1564                 }
1565
1566                 /* set the dimensions of the row */
1567                 tmprow->fill(fill(bview, tmprow, workWidth(bview)));
1568                 setHeightOfRow(bview, tmprow);
1569         } while (not_ready);
1570 }
1571
1572
1573 // this is just a little changed version of break again
1574 void LyXText::breakAgainOneRow(BufferView * bview, Row * row)
1575 {
1576         // get the next breakpoint
1577         Paragraph::size_type z = nextBreakPoint(bview, row, workWidth(bview));
1578         Row * tmprow = row;
1579
1580         if (z < row->par()->size()) {
1581                 if (!row->next()
1582                     || (row->next() && row->next()->par() != row->par())) {
1583                         /* insert a new row */
1584                         ++z;
1585                         insertRow(row, row->par(), z);
1586                         row = row->next();
1587                         row->height(0);
1588                 } else  {
1589                         row= row->next();
1590                         ++z;
1591                         if (row->pos() != z)
1592                                 row->pos(z);
1593                 }
1594         } else {
1595                 // if there are some rows too much, delete them
1596                 // only if you broke the whole paragraph!
1597                 Row * tmprow2 = row;
1598                 while (tmprow2->next()
1599                        && tmprow2->next()->par() == row->par()) {
1600                         tmprow2 = tmprow2->next();
1601                 }
1602                 while (tmprow2 != row) {
1603                         tmprow2 = tmprow2->previous();
1604                         removeRow(tmprow2->next());
1605                 }
1606         }
1607
1608         // set the dimensions of the row
1609         tmprow->fill(fill(bview, tmprow, workWidth(bview)));
1610         setHeightOfRow(bview, tmprow);
1611 }
1612
1613
1614 void LyXText::breakParagraph(BufferView * bview, char keep_layout)
1615 {
1616    LyXLayout const & layout =
1617            textclasslist.Style(bview->buffer()->params.textclass,
1618                                cursor.par()->getLayout());
1619
1620    // this is only allowed, if the current paragraph is not empty or caption
1621    if ((cursor.par()->size() <= 0)
1622        && layout.labeltype!= LABEL_SENSITIVE)
1623            return;
1624
1625    setUndo(bview, Undo::INSERT,cursor.par(),cursor.par()->next());
1626
1627    // Always break behind a space
1628    //
1629    // It is better to erase the space (Dekel)
1630    if (cursor.pos() < cursor.par()->size()
1631        && cursor.par()->isLineSeparator(cursor.pos()))
1632            cursor.par()->erase(cursor.pos());
1633            // cursor.pos(cursor.pos() + 1);
1634
1635    // break the paragraph
1636    if (keep_layout)
1637      keep_layout = 2;
1638    else
1639      keep_layout = layout.isEnvironment();
1640    cursor.par()->breakParagraph(bview->buffer()->params, cursor.pos(),
1641                                 keep_layout);
1642
1643    // well this is the caption hack since one caption is really enough
1644    if (layout.labeltype == LABEL_SENSITIVE) {
1645      if (!cursor.pos())
1646              // set to standard-layout
1647              cursor.par()->setLayout(0);
1648      else
1649              // set to standard-layout
1650              cursor.par()->next()->setLayout(0);
1651    }
1652
1653    /* if the cursor is at the beginning of a row without prior newline,
1654     * move one row up!
1655     * This touches only the screen-update. Otherwise we would may have
1656     * an empty row on the screen */
1657    if (cursor.pos() && !cursor.row()->par()->isNewline(cursor.row()->pos() - 1)
1658        && cursor.row()->pos() == cursor.pos()) {
1659            cursorLeft(bview);
1660    }
1661
1662    status(bview, LyXText::NEED_MORE_REFRESH);
1663    refresh_row = cursor.row();
1664    refresh_y = cursor.y() - cursor.row()->baseline();
1665
1666    // Do not forget the special right address boxes
1667    if (layout.margintype == MARGIN_RIGHT_ADDRESS_BOX) {
1668       while (refresh_row->previous() &&
1669              refresh_row->previous()->par() == refresh_row->par()) {
1670               refresh_row = refresh_row->previous();
1671               refresh_y -= refresh_row->height();
1672       }
1673    }
1674    removeParagraph(cursor.row());
1675
1676    // set the dimensions of the cursor row
1677    cursor.row()->fill(fill(bview, cursor.row(), workWidth(bview)));
1678
1679    setHeightOfRow(bview, cursor.row());
1680
1681    while (cursor.par()->next()->size()
1682           && cursor.par()->next()->isNewline(0))
1683            cursor.par()->next()->erase(0);
1684
1685    insertParagraph(bview, cursor.par()->next(), cursor.row());
1686
1687    updateCounters(bview, cursor.row()->previous());
1688
1689    /* This check is necessary. Otherwise the new empty paragraph will
1690     * be deleted automatically. And it is more friendly for the user! */
1691    if (cursor.pos())
1692            setCursor(bview, cursor.par()->next(), 0);
1693    else
1694            setCursor(bview, cursor.par(), 0);
1695
1696    if (cursor.row()->next())
1697            breakAgain(bview, cursor.row()->next());
1698
1699    need_break_row = 0;
1700 }
1701
1702
1703 // Just a macro to make some thing easier.
1704 void LyXText::redoParagraph(BufferView * bview) const
1705 {
1706         clearSelection(bview);
1707         redoParagraphs(bview, cursor, cursor.par()->next());
1708         setCursorIntern(bview, cursor.par(), cursor.pos());
1709 }
1710
1711
1712 /* insert a character, moves all the following breaks in the
1713  * same Paragraph one to the right and make a rebreak */
1714 void LyXText::insertChar(BufferView * bview, char c)
1715 {
1716         setUndo(bview, Undo::INSERT,
1717                 cursor.par(), cursor.par()->next());
1718
1719         // When the free-spacing option is set for the current layout,
1720         // disable the double-space checking
1721
1722         bool const freeSpacing =
1723                 textclasslist.Style(bview->buffer()->params.textclass,
1724                                cursor.row()->par()->getLayout()).free_spacing;
1725
1726
1727         if (lyxrc.auto_number) {
1728                 static string const number_operators = "+-/*";
1729                 static string const number_unary_operators = "+-";
1730                 static string const number_seperators = ".,:";
1731
1732                 if (current_font.number() == LyXFont::ON) {
1733                         if (!isdigit(c) && !contains(number_operators, c) &&
1734                             !(contains(number_seperators, c) &&
1735                               cursor.pos() >= 1 &&
1736                               cursor.pos() < cursor.par()->size() &&
1737                               getFont(bview->buffer(),
1738                                       cursor.par(),
1739                                       cursor.pos()).number() == LyXFont::ON &&
1740                               getFont(bview->buffer(),
1741                                       cursor.par(),
1742                                       cursor.pos()-1).number() == LyXFont::ON)
1743                             )
1744                                 Number(bview); // Set current_font.number to OFF
1745                 } else if (isdigit(c) &&
1746                            real_current_font.isVisibleRightToLeft()) {
1747                         Number(bview); // Set current_font.number to ON
1748
1749                         if (cursor.pos() > 0) {
1750                                 char const c = cursor.par()->getChar(cursor.pos() - 1);
1751                                 if (contains(number_unary_operators, c) &&
1752                                     (cursor.pos() == 1 ||
1753                                      cursor.par()->isSeparator(cursor.pos() - 2) ||
1754                                      cursor.par()->isNewline(cursor.pos() - 2) )
1755                                    ) {
1756                                         setCharFont(bview->buffer(),
1757                                                     cursor.par(),
1758                                                     cursor.pos() - 1,
1759                                                     current_font);
1760                                 } else if (contains(number_seperators, c) &&
1761                                            cursor.pos() >= 2 &&
1762                                            getFont(bview->buffer(),
1763                                                    cursor.par(),
1764                                                    cursor.pos()-2).number() == LyXFont::ON) {
1765                                         setCharFont(bview->buffer(),
1766                                                     cursor.par(),
1767                                                     cursor.pos() - 1,
1768                                                     current_font);
1769                                 }
1770                         }
1771                 }
1772         }
1773
1774
1775         /* First check, if there will be two blanks together or a blank at
1776           the beginning of a paragraph.
1777           I decided to handle blanks like normal characters, the main
1778           difference are the special checks when calculating the row.fill
1779           (blank does not count at the end of a row) and the check here */
1780
1781         // The bug is triggered when we type in a description environment:
1782         // The current_font is not changed when we go from label to main text
1783         // and it should (along with realtmpfont) when we type the space.
1784         // CHECK There is a bug here! (Asger)
1785
1786         LyXFont realtmpfont = real_current_font;
1787         LyXFont rawtmpfont = current_font;  /* store the current font.
1788                                      * This is because of the use
1789                                      * of cursor movements. The moving
1790                                      * cursor would refresh the
1791                                      * current font */
1792
1793         // Get the font that is used to calculate the baselineskip
1794         Paragraph::size_type const lastpos = cursor.par()->size();
1795         LyXFont rawparfont =
1796                 cursor.par()->getFontSettings(bview->buffer()->params,
1797                                               lastpos - 1);
1798
1799         bool jumped_over_space = false;
1800
1801         if (!freeSpacing && IsLineSeparatorChar(c)) {
1802                 if ((cursor.pos() > 0
1803                      && cursor.par()->isLineSeparator(cursor.pos() - 1))
1804                     || (cursor.pos() > 0
1805                         && cursor.par()->isNewline(cursor.pos() - 1))
1806                     || (cursor.pos() == 0)) {
1807                         static bool sent_space_message = false;
1808                         if (!sent_space_message) {
1809                                 if (cursor.pos() == 0)
1810                                         bview->owner()->message(_("You cannot insert a space at the beginning of a paragraph.  Please read the Tutorial."));
1811                                 else
1812                                         bview->owner()->message(_("You cannot type two spaces this way.  Please read the Tutorial."));
1813                                 sent_space_message = true;
1814                         }
1815                         charInserted();
1816                         return;
1817                 }
1818         } else if (IsNewlineChar(c)) {
1819                 if (cursor.par() == cursor.par()
1820                     && cursor.pos() <= beginningOfMainBody(bview->buffer(), cursor.par())) {
1821                         charInserted();
1822                         return;
1823                 }
1824                 /* No newline at first position
1825                  * of a paragraph or behind labels.
1826                  * TeX does not allow that. */
1827
1828                 if (cursor.pos() < cursor.par()->size() &&
1829                     cursor.par()->isLineSeparator(cursor.pos()))
1830                         // newline always after a blank!
1831                         cursorRight(bview);
1832                 cursor.row()->fill(-1);        // to force a new break
1833         }
1834
1835         // the display inset stuff
1836         if (cursor.row()->par()->getChar(cursor.row()->pos()) == Paragraph::META_INSET
1837             && cursor.row()->par()->getInset(cursor.row()->pos())
1838             && (cursor.row()->par()->getInset(cursor.row()->pos())->display() ||
1839                 cursor.row()->par()->getInset(cursor.row()->pos())->needFullRow()))
1840                 cursor.row()->fill(-1); // to force a new break
1841
1842         // get the cursor row fist
1843         Row * row = cursor.row();
1844         int y = cursor.y() - row->baseline();
1845         if (c != Paragraph::META_INSET) /* Here case LyXText::InsertInset
1846                                             * already insertet the character */
1847                 cursor.par()->insertChar(cursor.pos(), c);
1848         setCharFont(bview->buffer(), cursor.par(), cursor.pos(), rawtmpfont);
1849
1850         if (!jumped_over_space) {
1851                 // refresh the positions
1852                 Row * tmprow = row;
1853                 while (tmprow->next() && tmprow->next()->par() == row->par()) {
1854                         tmprow = tmprow->next();
1855                         tmprow->pos(tmprow->pos() + 1);
1856                 }
1857         }
1858
1859         // Is there a break one row above
1860         if ((cursor.par()->isLineSeparator(cursor.pos())
1861              || cursor.par()->isNewline(cursor.pos())
1862              || cursor.row()->fill() == -1)
1863             && row->previous() && row->previous()->par() == row->par()) {
1864                 Paragraph::size_type z = nextBreakPoint(bview,
1865                                                            row->previous(),
1866                                                            workWidth(bview));
1867                 if (z >= row->pos()) {
1868                         row->pos(z + 1);
1869
1870                         // set the dimensions of the row above
1871                         row->previous()->fill(fill(bview,
1872                                                    row->previous(),
1873                                                    workWidth(bview)));
1874
1875                         setHeightOfRow(bview, row->previous());
1876
1877                         y -= row->previous()->height();
1878                         refresh_y = y;
1879                         refresh_row = row->previous();
1880                         status(bview, LyXText::NEED_MORE_REFRESH);
1881
1882                         breakAgainOneRow(bview, row);
1883
1884                         current_font = rawtmpfont;
1885                         real_current_font = realtmpfont;
1886                         setCursor(bview, cursor.par(), cursor.pos() + 1,
1887                                   false, cursor.boundary());
1888                         // cursor MUST be in row now.
1889
1890                         if (row->next() && row->next()->par() == row->par())
1891                                 need_break_row = row->next();
1892                         else
1893                                 need_break_row = 0;
1894
1895                         // check, wether the last characters font has changed.
1896                         if (cursor.pos() && cursor.pos() == cursor.par()->size()
1897                             && rawparfont != rawtmpfont)
1898                                 redoHeightOfParagraph(bview, cursor);
1899
1900                         charInserted();
1901                         return;
1902                 }
1903         }
1904
1905         // recalculate the fill of the row
1906         if (row->fill() >= 0)  /* needed because a newline
1907                               * will set fill to -1. Otherwise
1908                               * we would not get a rebreak! */
1909                 row->fill(fill(bview, row, workWidth(bview)));
1910         if (row->fill() < 0) {
1911                 refresh_y = y;
1912                 refresh_row = row;
1913                 refresh_x = cursor.x();
1914                 refresh_pos = cursor.pos();
1915                 status(bview, LyXText::NEED_MORE_REFRESH);
1916                 breakAgainOneRow(bview, row);
1917                 // will the cursor be in another row now?
1918                 if (rowLast(row) <= cursor.pos() + 1 && row->next()) {
1919                         if (row->next() && row->next()->par() == row->par())
1920                                 // this should always be true
1921                                 row = row->next();
1922                         breakAgainOneRow(bview, row);
1923                 }
1924                 current_font = rawtmpfont;
1925                 real_current_font = realtmpfont;
1926
1927                 setCursor(bview, cursor.par(), cursor.pos() + 1, false,
1928                           cursor.boundary());
1929                 if (isBoundary(bview->buffer(), cursor.par(), cursor.pos())
1930                     != cursor.boundary())
1931                         setCursor(bview, cursor.par(), cursor.pos(), false,
1932                           !cursor.boundary());
1933                 if (row->next() && row->next()->par() == row->par())
1934                         need_break_row = row->next();
1935                 else
1936                         need_break_row = 0;
1937         } else {
1938                 refresh_y = y;
1939                 refresh_x = cursor.x();
1940                 refresh_row = row;
1941                 refresh_pos = cursor.pos();
1942
1943                 int const tmpheight = row->height();
1944                 setHeightOfRow(bview, row);
1945                 if (tmpheight == row->height())
1946                         status(bview, LyXText::NEED_VERY_LITTLE_REFRESH);
1947                 else
1948                         status(bview, LyXText::NEED_MORE_REFRESH);
1949
1950                 current_font = rawtmpfont;
1951                 real_current_font = realtmpfont;
1952                 setCursor(bview, cursor.par(), cursor.pos() + 1, false,
1953                           cursor.boundary());
1954         }
1955
1956         // check, wether the last characters font has changed.
1957         if (cursor.pos() && cursor.pos() == cursor.par()->size()
1958             && rawparfont != rawtmpfont) {
1959                 redoHeightOfParagraph(bview, cursor);
1960         } else {
1961                 // now the special right address boxes
1962                 if (textclasslist.Style(bview->buffer()->params.textclass,
1963                                    cursor.par()->getLayout()).margintype
1964                     == MARGIN_RIGHT_ADDRESS_BOX) {
1965                         redoDrawingOfParagraph(bview, cursor);
1966                 }
1967         }
1968
1969         charInserted();
1970 }
1971
1972
1973 void LyXText::charInserted()
1974 {
1975         // Here we could call FinishUndo for every 20 characters inserted.
1976         // This is from my experience how emacs does it.
1977         static unsigned int counter;
1978         if (counter < 20) {
1979                 ++counter;
1980         } else {
1981                 finishUndo();
1982                 counter = 0;
1983         }
1984 }
1985
1986
1987 void LyXText::prepareToPrint(BufferView * bview,
1988                              Row * row, float & x,
1989                              float & fill_separator,
1990                              float & fill_hfill,
1991                              float & fill_label_hfill,
1992                              bool bidi) const
1993 {
1994         float nlh;
1995         float ns;
1996
1997         float w = row->fill();
1998         fill_hfill = 0;
1999         fill_label_hfill = 0;
2000         fill_separator = 0;
2001         fill_label_hfill = 0;
2002
2003         bool const is_rtl =
2004                 row->par()->isRightToLeftPar(bview->buffer()->params);
2005         if (is_rtl) {
2006                 x = (workWidth(bview) > 0)
2007                         ? rightMargin(bview->buffer(), row) : 0;
2008         } else
2009                 x = (workWidth(bview) > 0) ? leftMargin(bview, row) : 0;
2010
2011         // is there a manual margin with a manual label
2012         if (textclasslist.Style(bview->buffer()->params.textclass,
2013                            row->par()->getLayout()).margintype == MARGIN_MANUAL
2014             && textclasslist.Style(bview->buffer()->params.textclass,
2015                               row->par()->getLayout()).labeltype == LABEL_MANUAL) {
2016
2017                 /* one more since labels are left aligned */
2018                 nlh = numberOfLabelHfills(bview->buffer(), row) + 1;
2019                 if (nlh && !row->par()->getLabelWidthString().empty()) {
2020                         fill_label_hfill = labelFill(bview, row) / nlh;
2021                 }
2022         }
2023
2024         // are there any hfills in the row?
2025         float const nh = numberOfHfills(bview->buffer(), row);
2026
2027         if (nh)
2028           fill_hfill = w / nh;
2029         else  {
2030                 // is it block, flushleft or flushright?
2031                 // set x how you need it
2032         int align;
2033         if (row->par()->params().align() == LYX_ALIGN_LAYOUT)
2034           align = textclasslist.Style(bview->buffer()->params.textclass, row->par()->getLayout()).align;
2035         else
2036           align = row->par()->params().align();
2037
2038         // center displayed insets
2039         Inset * inset;
2040            if (row->par()->getChar(row->pos()) == Paragraph::META_INSET
2041                && (inset=row->par()->getInset(row->pos()))
2042                && (inset->display())) // || (inset->scroll() < 0)))
2043              align = (inset->lyxCode() == Inset::MATHMACRO_CODE)
2044                      ? LYX_ALIGN_BLOCK : LYX_ALIGN_CENTER;
2045
2046            switch (align) {
2047             case LYX_ALIGN_BLOCK:
2048               ns = numberOfSeparators(bview->buffer(), row);
2049               if (ns && row->next() && row->next()->par() == row->par() &&
2050                   !(row->next()->par()->isNewline(row->next()->pos() - 1))
2051                   && !(row->next()->par()->getChar(row->next()->pos()) == Paragraph::META_INSET
2052                        && row->next()->par()->getInset(row->next()->pos())
2053                        && row->next()->par()->getInset(row->next()->pos())->display())
2054                   )
2055                 fill_separator = w / ns;
2056               else if (is_rtl)
2057                 x += w;
2058               break;
2059             case LYX_ALIGN_RIGHT:
2060               x += w;
2061               break;
2062             case LYX_ALIGN_CENTER:
2063               x += w / 2;
2064               break;
2065            }
2066         }
2067         if (!bidi)
2068                 return;
2069
2070         computeBidiTables(bview->buffer(), row);
2071         if (is_rtl) {
2072                 Paragraph::size_type main_body =
2073                         beginningOfMainBody(bview->buffer(), row->par());
2074                 Paragraph::size_type last = rowLast(row);
2075
2076                 if (main_body > 0 &&
2077                     (main_body-1 > last ||
2078                      !row->par()->isLineSeparator(main_body-1))) {
2079                         LyXLayout const & layout =
2080                                 textclasslist.Style(bview->buffer()->params.textclass,
2081                                                     row->par()->getLayout());
2082                         x += lyxfont::width(layout.labelsep,
2083                                             getFont(bview->buffer(), row->par(), -2));
2084                         if (main_body-1 <= last)
2085                                 x += fill_label_hfill;
2086                 }
2087         }
2088 }
2089
2090 /* important for the screen */
2091
2092
2093 /* the cursor set functions have a special mechanism. When they
2094 * realize, that you left an empty paragraph, they will delete it.
2095 * They also delete the corresponding row */
2096
2097 void LyXText::cursorRightOneWord(BufferView * bview) const
2098 {
2099         // treat floats, HFills and Insets as words
2100         LyXCursor tmpcursor = cursor;
2101         // CHECK See comment on top of text.C
2102
2103         if (tmpcursor.pos() == tmpcursor.par()->size()
2104             && tmpcursor.par()->next()) {
2105                         tmpcursor.par(tmpcursor.par()->next());
2106                         tmpcursor.pos(0);
2107         } else {
2108                 int steps = 0;
2109
2110                 // Skip through initial nonword stuff.
2111                 while (tmpcursor.pos() < tmpcursor.par()->size() &&
2112                        ! tmpcursor.par()->isWord(tmpcursor.pos())) {
2113                   //    printf("Current pos1 %d", tmpcursor.pos()) ;
2114                         tmpcursor.pos(tmpcursor.pos() + 1);
2115                         ++steps;
2116                 }
2117                 // Advance through word.
2118                 while (tmpcursor.pos() < tmpcursor.par()->size() &&
2119                         tmpcursor.par()->isWord( tmpcursor.pos())) {
2120                   //     printf("Current pos2 %d", tmpcursor.pos()) ;
2121                         tmpcursor.pos(tmpcursor.pos() + 1);
2122                         ++steps;
2123                 }
2124         }
2125         setCursor(bview, tmpcursor.par(), tmpcursor.pos());
2126 }
2127
2128
2129 void LyXText::cursorTab(BufferView * bview) const
2130 {
2131     LyXCursor tmpcursor = cursor;
2132     while (tmpcursor.pos() < tmpcursor.par()->size()
2133            && !tmpcursor.par()->isNewline(tmpcursor.pos()))
2134         tmpcursor.pos(tmpcursor.pos() + 1);
2135
2136     if (tmpcursor.pos() == tmpcursor.par()->size()){
2137         if (tmpcursor.par()->next()) {
2138             tmpcursor.par(tmpcursor.par()->next());
2139             tmpcursor.pos(0);
2140         }
2141     } else
2142         tmpcursor.pos(tmpcursor.pos() + 1);
2143     setCursor(bview, tmpcursor.par(), tmpcursor.pos());
2144 }
2145
2146
2147 /* -------> Skip initial whitespace at end of word and move cursor to *start*
2148             of prior word, not to end of next prior word. */
2149
2150 void LyXText::cursorLeftOneWord(BufferView * bview)  const
2151 {
2152         LyXCursor tmpcursor = cursor;
2153         cursorLeftOneWord(tmpcursor);
2154         setCursor(bview, tmpcursor.par(), tmpcursor.pos());
2155 }
2156
2157 void LyXText::cursorLeftOneWord(LyXCursor  & cur)  const
2158 {
2159         // treat HFills, floats and Insets as words
2160         cur = cursor;
2161         while (cur.pos()
2162                && (cur.par()->isSeparator(cur.pos() - 1)
2163                    || cur.par()->isKomma(cur.pos() - 1))
2164                && !(cur.par()->isHfill(cur.pos() - 1)
2165                     || cur.par()->isInset(cur.pos() - 1)))
2166                 cur.pos(cur.pos() - 1);
2167
2168         if (cur.pos()
2169             && (cur.par()->isInset(cur.pos() - 1)
2170                 || cur.par()->isHfill(cur.pos() - 1))) {
2171                 cur.pos(cur.pos() - 1);
2172         } else if (!cur.pos()) {
2173                 if (cur.par()->previous()){
2174                         cur.par(cur.par()->previous());
2175                         cur.pos(cur.par()->size());
2176                 }
2177         } else {                // Here, cur != 0
2178                 while (cur.pos() > 0 &&
2179                        cur.par()->isWord(cur.pos()-1) )
2180                         cur.pos(cur.pos() - 1);
2181         }
2182 }
2183
2184 /* -------> Select current word. This depends on behaviour of
2185 CursorLeftOneWord(), so it is patched as well. */
2186 void LyXText::getWord(LyXCursor & from, LyXCursor & to,
2187                       word_location const loc) const
2188 {
2189         // first put the cursor where we wana start to select the word
2190         from = cursor;
2191         switch(loc) {
2192         case WHOLE_WORD_STRICT:
2193                 if (cursor.pos() == 0 || cursor.pos() == cursor.par()->size()
2194                     || cursor.par()->isSeparator(cursor.pos())
2195                     || cursor.par()->isKomma(cursor.pos())
2196                     || cursor.par()->isSeparator(cursor.pos() -1)
2197                     || cursor.par()->isKomma(cursor.pos() -1)) {
2198                         to = from;
2199                         return;
2200                 }
2201                 // no break here, we go to the next
2202
2203         case WHOLE_WORD:
2204                 // Move cursor to the beginning, when not already there.
2205                 if (from.pos() && !from.par()->isSeparator(from.pos() - 1)
2206                     && !from.par()->isKomma(from.pos() - 1))
2207                         cursorLeftOneWord(from);
2208                 break;
2209         case PREVIOUS_WORD:
2210                 // always move the cursor to the beginning of previous word
2211                 cursorLeftOneWord(from);
2212                 break;
2213         case NEXT_WORD:
2214                 lyxerr << "LyXText::getWord: NEXT_WORD not implemented yet\n";
2215                 break;
2216         case PARTIAL_WORD:
2217                 break;
2218         }
2219         to = from;
2220         while (to.pos() < to.par()->size()
2221                && !to.par()->isSeparator(to.pos())
2222                && !to.par()->isKomma(to.pos())
2223                && !to.par()->isHfill(to.pos()) )
2224         {
2225                 to.pos(to.pos() + 1);
2226         }
2227 }
2228
2229
2230 void LyXText::selectWord(BufferView * bview, word_location const loc)
2231 {
2232         LyXCursor from;
2233         LyXCursor to;
2234         getWord(from, to, loc);
2235         if (cursor != from)
2236                 setCursor(bview, from.par(), from.pos());
2237         if (to == from)
2238                 return;
2239         selection.cursor = cursor;
2240         setCursor(bview, to.par(), to.pos() );
2241         setSelection(bview);
2242 }
2243
2244
2245 /* -------> Select the word currently under the cursor when no
2246         selection is currently set */
2247 bool LyXText::selectWordWhenUnderCursor(BufferView * bview,
2248                                         word_location const loc)
2249 {
2250         if (!selection.set()) {
2251                 selectWord(bview, loc);
2252                 return selection.set();
2253         }
2254         return false;
2255 }
2256
2257
2258 // This function is only used by the spellchecker for NextWord().
2259 // It doesn't handle LYX_ACCENTs and probably never will.
2260 string const LyXText::selectNextWord(BufferView * bview,
2261                                      float & value) const
2262 {
2263         if (the_locking_inset) {
2264                 string str = the_locking_inset->selectNextWord(bview, value);
2265                 if (!str.empty()) {
2266                         value += float(cursor.y())/float(height);
2267                         return str;
2268                 }
2269 #warning Dekel please have a look on this one RTL? (Jug)
2270                 // we have to go on checking so move cusor to the right
2271                 if (cursor.pos() == cursor.par()->size()) {
2272                         if (!cursor.par()->next())
2273                                 return str;
2274                         cursor.par(cursor.par()->next());
2275                         cursor.pos(0);
2276                 } else
2277                         cursor.pos(cursor.pos() + 1);
2278         }
2279         Paragraph * tmppar = cursor.par();
2280
2281         // If this is not the very first word, skip rest of
2282         // current word because we are probably in the middle
2283         // of a word if there is text here.
2284         if (cursor.pos() || cursor.par()->previous()) {
2285                 while (cursor.pos() < cursor.par()->size()
2286                        && cursor.par()->isLetter(cursor.pos()))
2287                         cursor.pos(cursor.pos() + 1);
2288         }
2289
2290         // Now, skip until we have real text (will jump paragraphs)
2291         while ((cursor.par()->size() > cursor.pos()
2292                && (!cursor.par()->isLetter(cursor.pos())
2293 #ifndef NO_LATEX
2294                     || cursor.par()->getFont(bview->buffer()->params, cursor.pos())
2295                     .latex() == LyXFont::ON
2296 #endif
2297                         )
2298                && (!cursor.par()->isInset(cursor.pos()) ||
2299                    !cursor.par()->getInset(cursor.pos())->isTextInset()))
2300                || (cursor.par()->size() == cursor.pos()
2301                    && cursor.par()->next()))
2302         {
2303                 if (cursor.pos() == cursor.par()->size()) {
2304                         cursor.par(cursor.par()->next());
2305                         cursor.pos(0);
2306                 } else
2307                         cursor.pos(cursor.pos() + 1);
2308         }
2309
2310         // now check if we hit an inset so it has to be a inset containing text!
2311         if (cursor.pos() < cursor.par()->size() &&
2312                 cursor.par()->isInset(cursor.pos()))
2313         {
2314                 // lock the inset!
2315                 cursor.par()->getInset(cursor.pos())->edit(bview);
2316                 // now call us again to do the above trick
2317                 // but obviously we have to start from down below ;)
2318                 return bview->text->selectNextWord(bview, value);
2319         }
2320
2321         // Update the value if we changed paragraphs
2322         if (cursor.par() != tmppar){
2323                 setCursor(bview, cursor.par(), cursor.pos());
2324                 value = float(cursor.y())/float(height);
2325         }
2326
2327         // Start the selection from here
2328         selection.cursor = cursor;
2329
2330         Inset * inset;
2331
2332         // and find the end of the word
2333         // (optional hyphens are part of a word)
2334         while (cursor.pos() < cursor.par()->size()
2335                && (cursor.par()->isLetter(cursor.pos()))
2336                // assignment is intentional here
2337                || ((inset = getInset())
2338                    && inset->lyxCode() == Inset::SPECIALCHAR_CODE
2339                    && static_cast<InsetSpecialChar *>(inset)->kind()
2340                         == InsetSpecialChar::HYPHENATION
2341                    ))
2342                 cursor.pos(cursor.pos() + 1);
2343
2344         // Finally, we copy the word to a string and return it
2345         string str;
2346         if (selection.cursor.pos() < cursor.pos()) {
2347                 Paragraph::size_type i;
2348                 for (i = selection.cursor.pos(); i < cursor.pos(); ++i) {
2349                         if (cursor.par()->getChar(i) != Paragraph::META_INSET)
2350                                 str += cursor.par()->getChar(i);
2351                 }
2352         }
2353         return str;
2354 }
2355
2356
2357 // This one is also only for the spellchecker
2358 void LyXText::selectSelectedWord(BufferView * bview)
2359 {
2360         if (the_locking_inset) {
2361                 the_locking_inset->selectSelectedWord(bview);
2362                 return;
2363         }
2364         // move cursor to the beginning
2365         setCursor(bview, selection.cursor.par(), selection.cursor.pos());
2366
2367         // set the sel cursor
2368         selection.cursor = cursor;
2369         Inset * inset;
2370
2371         // now find the end of the word
2372         while (cursor.pos() < cursor.par()->size()
2373                && (cursor.par()->isLetter(cursor.pos())
2374                    // assignment is intentional here
2375                    || ((inset = getInset())
2376                        && inset->lyxCode() == Inset::SPECIALCHAR_CODE
2377                        && static_cast<InsetSpecialChar *>(inset)->kind()
2378                                 == InsetSpecialChar::HYPHENATION
2379                        )))
2380                 cursor.pos(cursor.pos() + 1);
2381
2382         setCursor(bview, cursor.par(), cursor.pos());
2383
2384         // finally set the selection
2385         setSelection(bview);
2386 }
2387
2388
2389 /* -------> Delete from cursor up to the end of the current or next word. */
2390 void LyXText::deleteWordForward(BufferView * bview)
2391 {
2392         if (!cursor.par()->size())
2393                 cursorRight(bview);
2394         else {
2395                 LyXCursor tmpcursor = cursor;
2396                 tmpcursor.row(0); // ??
2397                 selection.set(true); // to avoid deletion
2398                 cursorRightOneWord(bview);
2399                 setCursor(bview, tmpcursor, tmpcursor.par(), tmpcursor.pos());
2400                 selection.cursor = cursor;
2401                 cursor = tmpcursor;
2402                 setSelection(bview);
2403
2404                 /* -----> Great, CutSelection() gets rid of multiple spaces. */
2405                 cutSelection(bview);
2406         }
2407 }
2408
2409
2410 /* -------> Delete from cursor to start of current or prior word. */
2411 void LyXText::deleteWordBackward(BufferView * bview)
2412 {
2413        if (!cursor.par()->size())
2414                cursorLeft(bview);
2415        else {
2416                LyXCursor tmpcursor = cursor;
2417                tmpcursor.row(0); // ??
2418                selection.set(true); // to avoid deletion
2419                cursorLeftOneWord(bview);
2420                setCursor(bview, tmpcursor, tmpcursor.par(), tmpcursor.pos());
2421                selection.cursor = cursor;
2422                cursor = tmpcursor;
2423                setSelection(bview);
2424                cutSelection(bview);
2425        }
2426 }
2427
2428
2429 /* -------> Kill to end of line. */
2430 void LyXText::deleteLineForward(BufferView * bview)
2431 {
2432         if (!cursor.par()->size())
2433                 // Paragraph is empty, so we just go to the right
2434                 cursorRight(bview);
2435         else {
2436                 LyXCursor tmpcursor = cursor;
2437                 // We can't store the row over a regular setCursor
2438                 // so we set it to 0 and reset it afterwards.
2439                 tmpcursor.row(0); // ??
2440                 selection.set(true); // to avoid deletion
2441                 cursorEnd(bview);
2442                 setCursor(bview, tmpcursor, tmpcursor.par(), tmpcursor.pos());
2443                 selection.cursor = cursor;
2444                 cursor = tmpcursor;
2445                 setSelection(bview);
2446                 // What is this test for ??? (JMarc)
2447                 if (!selection.set()) {
2448                         deleteWordForward(bview);
2449                 } else {
2450                         cutSelection(bview);
2451                 }
2452         }
2453 }
2454
2455
2456 // Change the case of a word at cursor position.
2457 // This function directly manipulates Paragraph::text because there
2458 // is no Paragraph::SetChar currently. I did what I could to ensure
2459 // that it is correct. I guess part of it should be moved to
2460 // Paragraph, but it will have to change for 1.1 anyway. At least
2461 // it does not access outside of the allocated array as the older
2462 // version did. (JMarc)
2463 void LyXText::changeCase(BufferView * bview, LyXText::TextCase action)
2464 {
2465         LyXCursor from;
2466         LyXCursor to;
2467
2468         if (selection.set()) {
2469                 from = selection.start;
2470                 to = selection.end;
2471         } else {
2472                 getWord(from, to, PARTIAL_WORD);
2473                 setCursor(bview, to.par(), to.pos() + 1);
2474         }
2475
2476         changeRegionCase(bview, from, to, action);
2477 }
2478
2479
2480 void LyXText::changeRegionCase(BufferView * bview,
2481                                LyXCursor const & from,
2482                                LyXCursor const & to,
2483                                LyXText::TextCase action)
2484 {
2485         lyx::Assert(from <= to);
2486
2487         setUndo(bview, Undo::FINISH,
2488                 from.par(), to.par()->next());
2489
2490         Paragraph::size_type pos = from.pos();
2491         Paragraph * par = from.par();
2492
2493         while (par && (pos != to.pos() || par != to.par())) {
2494                 unsigned char c = par->getChar(pos);
2495                 if (!IsInsetChar(c) && !IsHfillChar(c)) {
2496                         switch (action) {
2497                         case text_lowercase:
2498                                 c = tolower(c);
2499                                 break;
2500                         case text_capitalization:
2501                                 c = toupper(c);
2502                                 action = text_lowercase;
2503                                 break;
2504                         case text_uppercase:
2505                                 c = toupper(c);
2506                                 break;
2507                         }
2508                 }
2509                 par->setChar(pos, c);
2510                 checkParagraph(bview, par, pos);
2511
2512                 ++pos;
2513                 if (pos == par->size()) {
2514                         par = par->next();
2515                         pos = 0;
2516                 }
2517         }
2518         if (to.row() != from.row()) {
2519                 refresh_y = from.y() - from.row()->baseline();
2520                 refresh_row = from.row();
2521                 status(bview, LyXText::NEED_MORE_REFRESH);
2522         }
2523 }
2524
2525
2526 void LyXText::transposeChars(BufferView & bview)
2527 {
2528         Paragraph * tmppar = cursor.par();
2529
2530         setUndo(&bview, Undo::FINISH,
2531                 tmppar, tmppar->next());
2532
2533         Paragraph::size_type tmppos = cursor.pos();
2534
2535         // First decide if it is possible to transpose at all
2536
2537         // We are at the beginning of a paragraph.
2538         if (tmppos == 0) return;
2539
2540         // We are at the end of a paragraph.
2541         if (tmppos == tmppar->size() - 1) return;
2542
2543         unsigned char c1 = tmppar->getChar(tmppos);
2544         unsigned char c2 = tmppar->getChar(tmppos - 1);
2545
2546         if (c1 != Paragraph::META_INSET
2547             && c2 != Paragraph::META_INSET) {
2548                 tmppar->setChar(tmppos, c2);
2549                 tmppar->setChar(tmppos - 1, c1);
2550         }
2551         // We should have an implementation that handles insets
2552         // as well, but that will have to come later. (Lgb)
2553         checkParagraph(const_cast<BufferView*>(&bview), tmppar, tmppos);
2554 }
2555
2556
2557 void LyXText::Delete(BufferView * bview)
2558 {
2559         // this is a very easy implementation
2560
2561         LyXCursor old_cursor = cursor;
2562         int const old_cur_par_id = old_cursor.par()->id();
2563         int const old_cur_par_prev_id = old_cursor.par()->previous() ?
2564                 old_cursor.par()->previous()->id() : 0;
2565
2566         // just move to the right
2567         cursorRight(bview);
2568
2569         // CHECK Look at the comment here.
2570         // This check is not very good...
2571         // The cursorRightIntern calls DeleteEmptyParagrapgMechanism
2572         // and that can very well delete the par or par->previous in
2573         // old_cursor. Will a solution where we compare paragraph id's
2574         //work better?
2575         if ((cursor.par()->previous() ? cursor.par()->previous()->id() : 0)
2576             == old_cur_par_prev_id
2577             && cursor.par()->id() != old_cur_par_id)
2578                 return; // delete-empty-paragraph-mechanism has done it
2579
2580         // if you had success make a backspace
2581         if (old_cursor.par() != cursor.par() || old_cursor.pos() != cursor.pos()) {
2582                 LyXCursor tmpcursor = cursor;
2583                 cursor = old_cursor; // to make sure undo gets the right cursor position
2584                 setUndo(bview, Undo::DELETE,
2585                         cursor.par(), cursor.par()->next());
2586                 cursor = tmpcursor;
2587                 backspace(bview);
2588         }
2589 }
2590
2591
2592 void LyXText::backspace(BufferView * bview)
2593 {
2594         // Get the font that is used to calculate the baselineskip
2595         Paragraph::size_type lastpos = cursor.par()->size();
2596         LyXFont rawparfont =
2597                 cursor.par()->getFontSettings(bview->buffer()->params,
2598                                               lastpos - 1);
2599
2600         if (cursor.pos() == 0) {
2601                 // The cursor is at the beginning of a paragraph,
2602                 // so the the backspace will collapse two paragraphs into one.
2603
2604                 // we may paste some paragraphs
2605
2606                 // is it an empty paragraph?
2607
2608                 if ((lastpos == 0
2609                      || (lastpos == 1 && cursor.par()->isSeparator(0)))) {
2610                         // This is an empty paragraph and we delete it just by moving the cursor one step
2611                         // left and let the DeleteEmptyParagraphMechanism handle the actual deletion
2612                         // of the paragraph.
2613
2614                         if (cursor.par()->previous()) {
2615                                 Paragraph * tmppar = cursor.par()->previous();
2616                                 if (cursor.par()->getLayout() == tmppar->getLayout()
2617                                     && cursor.par()->getAlign() == tmppar->getAlign()) {
2618                                         // Inherit bottom DTD from the paragraph below.
2619                                         // (the one we are deleting)
2620                                         tmppar->params().lineBottom(cursor.par()->params().lineBottom());
2621                                         tmppar->params().spaceBottom(cursor.par()->params().spaceBottom());
2622                                         tmppar->params().pagebreakBottom(cursor.par()->params().pagebreakBottom());
2623                                 }
2624
2625                                 cursorLeft(bview);
2626
2627                                 // the layout things can change the height of a row !
2628                                 int const tmpheight = cursor.row()->height();
2629                                 setHeightOfRow(bview, cursor.row());
2630                                 if (cursor.row()->height() != tmpheight) {
2631                                         refresh_y = cursor.y() - cursor.row()->baseline();
2632                                         refresh_row = cursor.row();
2633                                         status(bview, LyXText::NEED_MORE_REFRESH);
2634                                 }
2635                                 return;
2636                         }
2637                 }
2638
2639                 if (cursor.par()->previous()) {
2640                         setUndo(bview, Undo::DELETE,
2641                                 cursor.par()->previous(),
2642                                 cursor.par()->next());
2643                 }
2644
2645                 Paragraph * tmppar = cursor.par();
2646                 Row * tmprow = cursor.row();
2647
2648                 // We used to do cursorLeftIntern() here, but it is
2649                 // not a good idea since it triggers the auto-delete
2650                 // mechanism. So we do a cursorLeftIntern()-lite,
2651                 // without the dreaded mechanism. (JMarc)
2652                 if (cursor.par()->previous()) {
2653                         // steps into the above paragraph.
2654                         setCursorIntern(bview, cursor.par()->previous(),
2655                                         cursor.par()->previous()->size(),
2656                                         false);
2657                 }
2658
2659                 /* Pasting is not allowed, if the paragraphs have different
2660                    layout. I think it is a real bug of all other
2661                    word processors to allow it. It confuses the user.
2662                    Even so with a footnote paragraph and a non-footnote
2663                    paragraph. I will not allow pasting in this case,
2664                    because the user would be confused if the footnote behaves
2665                    different wether it is open or closed.
2666
2667                    Correction: Pasting is always allowed with standard-layout
2668                 */
2669                 if (cursor.par() != tmppar
2670                     && (cursor.par()->getLayout() == tmppar->getLayout()
2671                         || tmppar->getLayout() == 0 /*standard*/)
2672                     && cursor.par()->getAlign() == tmppar->getAlign()) {
2673
2674                         removeParagraph(tmprow);
2675                         removeRow(tmprow);
2676                         cursor.par()->pasteParagraph(bview->buffer()->params);
2677
2678                         if (!cursor.pos() || !cursor.par()->isSeparator(cursor.pos() - 1))
2679                                 ; //cursor.par()->insertChar(cursor.pos(), ' ');
2680                         // strangely enough it seems that commenting out the line above removes
2681                         // most or all of the segfaults. I will however also try to move the
2682                         // two Remove... lines in front of the PasteParagraph too.
2683                         else
2684                                 if (cursor.pos())
2685                                         cursor.pos(cursor.pos() - 1);
2686
2687                         status(bview, LyXText::NEED_MORE_REFRESH);
2688                         refresh_row = cursor.row();
2689                         refresh_y = cursor.y() - cursor.row()->baseline();
2690
2691                         // remove the lost paragraph
2692                         // This one is not safe, since the paragraph that the tmprow and the
2693                         // following rows belong to has been deleted by the PasteParagraph
2694                         // above. The question is... could this be moved in front of the
2695                         // PasteParagraph?
2696                         //RemoveParagraph(tmprow);
2697                         //RemoveRow(tmprow);
2698
2699                         // This rebuilds the rows.
2700                         appendParagraph(bview, cursor.row());
2701                         updateCounters(bview, cursor.row());
2702
2703                         // the row may have changed, block, hfills etc.
2704                         setCursor(bview, cursor.par(), cursor.pos(), false);
2705                 }
2706         } else {
2707                 /* this is the code for a normal backspace, not pasting
2708                  * any paragraphs */
2709                 setUndo(bview, Undo::DELETE,
2710                         cursor.par(), cursor.par()->next());
2711                 // We used to do cursorLeftIntern() here, but it is
2712                 // not a good idea since it triggers the auto-delete
2713                 // mechanism. So we do a cursorLeftIntern()-lite,
2714                 // without the dreaded mechanism. (JMarc)
2715                 setCursorIntern(bview, cursor.par(), cursor.pos()- 1,
2716                                 false, cursor.boundary());
2717
2718                 // some insets are undeletable here
2719                 if (cursor.par()->getChar(cursor.pos()) == Paragraph::META_INSET) {
2720                         if (!cursor.par()->getInset(cursor.pos())->deletable())
2721                                 return;
2722                         // force complete redo when erasing display insets
2723                         // this is a cruel method but safe..... Matthias
2724                         if (cursor.par()->getInset(cursor.pos())->display() ||
2725                             cursor.par()->getInset(cursor.pos())->needFullRow()) {
2726                                 cursor.par()->erase(cursor.pos());
2727                                 redoParagraph(bview);
2728                                 return;
2729                         }
2730                 }
2731
2732                 Row * row = cursor.row();
2733                 int y = cursor.y() - row->baseline();
2734                 Paragraph::size_type z;
2735                 /* remember that a space at the end of a row doesnt count
2736                  * when calculating the fill */
2737                 if (cursor.pos() < rowLast(row) ||
2738                     !cursor.par()->isLineSeparator(cursor.pos())) {
2739                         row->fill(row->fill() + singleWidth(bview,
2740                                                             cursor.par(),
2741                                                             cursor.pos()));
2742                 }
2743
2744                 /* some special code when deleting a newline. This is similar
2745                  * to the behavior when pasting paragraphs */
2746                 if (cursor.pos() && cursor.par()->isNewline(cursor.pos())) {
2747                         cursor.par()->erase(cursor.pos());
2748                         // refresh the positions
2749                         Row * tmprow = row;
2750                         while (tmprow->next() && tmprow->next()->par() == row->par()) {
2751                                 tmprow = tmprow->next();
2752                                 tmprow->pos(tmprow->pos() - 1);
2753                         }
2754                         if (cursor.par()->isLineSeparator(cursor.pos() - 1))
2755                                 cursor.pos(cursor.pos() - 1);
2756
2757                         if (cursor.pos() < cursor.par()->size()
2758                             && !cursor.par()->isSeparator(cursor.pos())) {
2759                                 cursor.par()->insertChar(cursor.pos(), ' ');
2760                                 setCharFont(bview->buffer(), cursor.par(),
2761                                             cursor.pos(), current_font);
2762                                 // refresh the positions
2763                                 tmprow = row;
2764                                 while (tmprow->next() && tmprow->next()->par() == row->par()) {
2765                                         tmprow = tmprow->next();
2766                                         tmprow->pos(tmprow->pos() + 1);
2767                                 }
2768                         }
2769                 } else {
2770                         cursor.par()->erase(cursor.pos());
2771
2772                         // refresh the positions
2773                         Row * tmprow = row;
2774                         while (tmprow->next()
2775                                && tmprow->next()->par() == row->par()) {
2776                                 tmprow = tmprow->next();
2777                                 tmprow->pos(tmprow->pos() - 1);
2778                         }
2779
2780                         // delete newlines at the beginning of paragraphs
2781                         while (cursor.par()->size() &&
2782                                cursor.par()->isNewline(cursor.pos()) &&
2783                                cursor.pos() == beginningOfMainBody(bview->buffer(),
2784                                                                    cursor.par())) {
2785                                 cursor.par()->erase(cursor.pos());
2786                                 // refresh the positions
2787                                 tmprow = row;
2788                                 while (tmprow->next() &&
2789                                        tmprow->next()->par() == row->par()) {
2790                                         tmprow = tmprow->next();
2791                                         tmprow->pos(tmprow->pos() - 1);
2792                                 }
2793                         }
2794                 }
2795
2796                 // is there a break one row above
2797                 if (row->previous() && row->previous()->par() == row->par()) {
2798                         z = nextBreakPoint(bview, row->previous(),
2799                                            workWidth(bview));
2800                         if (z >= row->pos()) {
2801                                 row->pos(z + 1);
2802
2803                                 Row * tmprow = row->previous();
2804
2805                                 // maybe the current row is now empty
2806                                 if (row->pos() >= row->par()->size()) {
2807                                         // remove it
2808                                         removeRow(row);
2809                                         need_break_row = 0;
2810                                 } else {
2811                                         breakAgainOneRow(bview, row);
2812                                         if (row->next() && row->next()->par() == row->par())
2813                                                 need_break_row = row->next();
2814                                         else
2815                                                 need_break_row = 0;
2816                                 }
2817
2818                                 // set the dimensions of the row above
2819                                 y -= tmprow->height();
2820                                 tmprow->fill(fill(bview, tmprow,
2821                                                   workWidth(bview)));
2822                                 setHeightOfRow(bview, tmprow);
2823
2824                                 refresh_y = y;
2825                                 refresh_row = tmprow;
2826                                 status(bview, LyXText::NEED_MORE_REFRESH);
2827                                 setCursor(bview, cursor.par(), cursor.pos(),
2828                                           false, cursor.boundary());
2829                                 //current_font = rawtmpfont;
2830                                 //real_current_font = realtmpfont;
2831                                 // check, whether the last character's font has changed.
2832                                 if (rawparfont !=
2833                                     cursor.par()->getFontSettings(bview->buffer()->params,
2834                                                                   cursor.par()->size() - 1))
2835                                         redoHeightOfParagraph(bview, cursor);
2836                                 return;
2837                         }
2838                 }
2839
2840                 // break the cursor row again
2841                 if (row->next() && row->next()->par() == row->par() &&
2842                     (rowLast(row) == row->par()->size() - 1 ||
2843                      nextBreakPoint(bview, row, workWidth(bview)) != rowLast(row))) {
2844
2845                         /* it can happen that a paragraph loses one row
2846                          * without a real breakup. This is when a word
2847                          * is to long to be broken. Well, I don t care this
2848                          * hack ;-) */
2849                         if (rowLast(row) == row->par()->size() - 1)
2850                                 removeRow(row->next());
2851
2852                         refresh_y = y;
2853                         refresh_row = row;
2854                         status(bview, LyXText::NEED_MORE_REFRESH);
2855
2856                         breakAgainOneRow(bview, row);
2857                         // will the cursor be in another row now?
2858                         if (row->next() && row->next()->par() == row->par() &&
2859                             rowLast(row) <= cursor.pos()) {
2860                                 row = row->next();
2861                                 breakAgainOneRow(bview, row);
2862                         }
2863
2864                         setCursor(bview, cursor.par(), cursor.pos(), false, cursor.boundary());
2865
2866                         if (row->next() && row->next()->par() == row->par())
2867                                 need_break_row = row->next();
2868                         else
2869                                 need_break_row = 0;
2870                 } else  {
2871                         // set the dimensions of the row
2872                         row->fill(fill(bview, row, workWidth(bview)));
2873                         int const tmpheight = row->height();
2874                         setHeightOfRow(bview, row);
2875                         if (tmpheight == row->height())
2876                                 status(bview, LyXText::NEED_VERY_LITTLE_REFRESH);
2877                         else
2878                                 status(bview, LyXText::NEED_MORE_REFRESH);
2879                         refresh_y = y;
2880                         refresh_row = row;
2881                         setCursor(bview, cursor.par(), cursor.pos(), false, cursor.boundary());
2882                 }
2883         }
2884
2885         // current_font = rawtmpfont;
2886         // real_current_font = realtmpfont;
2887
2888         if (isBoundary(bview->buffer(), cursor.par(), cursor.pos())
2889             != cursor.boundary())
2890                 setCursor(bview, cursor.par(), cursor.pos(), false,
2891                           !cursor.boundary());
2892
2893         lastpos = cursor.par()->size();
2894         if (cursor.pos() == lastpos)
2895                 setCurrentFont(bview);
2896
2897         // check, whether the last characters font has changed.
2898         if (rawparfont !=
2899             cursor.par()->getFontSettings(bview->buffer()->params, lastpos - 1)) {
2900                 redoHeightOfParagraph(bview, cursor);
2901         } else {
2902                 // now the special right address boxes
2903                 if (textclasslist.Style(bview->buffer()->params.textclass,
2904                                         cursor.par()->getLayout()).margintype == MARGIN_RIGHT_ADDRESS_BOX) {
2905                         redoDrawingOfParagraph(bview, cursor);
2906                 }
2907         }
2908 }
2909
2910
2911 void LyXText::getVisibleRow(BufferView * bview, int y_offset, int x_offset,
2912                             Row * row_ptr, int y, bool cleared)
2913 {
2914         // returns a printed row
2915         Painter & pain = bview->painter();
2916
2917         bool const is_rtl =
2918                 row_ptr->par()->isRightToLeftPar(bview->buffer()->params);
2919
2920         Paragraph::size_type const last = rowLastPrintable(row_ptr);
2921
2922         Paragraph::size_type vpos;
2923         Paragraph::size_type pos;
2924
2925         float tmpx;
2926
2927         LyXFont font(LyXFont::ALL_SANE);
2928         int maxdesc;
2929         if (row_ptr->height() <= 0) {
2930                 lyxerr << "LYX_ERROR: row.height: "
2931                        << row_ptr->height() << endl;
2932                 return;
2933         }
2934
2935         float x;
2936         float fill_separator;
2937         float fill_hfill;
2938         float fill_label_hfill;
2939         prepareToPrint(bview, row_ptr, x, fill_separator,
2940                        fill_hfill, fill_label_hfill);
2941
2942         if (inset_owner && (x < 0))
2943                 x = 0;
2944         x += x_offset;
2945
2946         // clear the area where we want to paint/print
2947         int const ww = bview->workWidth();
2948
2949         bool clear_area = true;
2950         Inset * inset = 0;
2951
2952         if (!bview->screen()->forceClear() && last == row_ptr->pos()
2953             && row_ptr->par()->getChar(row_ptr->pos()) == Paragraph::META_INSET
2954             && (inset = row_ptr->par()->getInset(row_ptr->pos()))) {
2955                 clear_area = inset->doClearArea();
2956         }
2957         // we don't need to clear it's already done!!!
2958         if (cleared) {
2959                 clear_area = true;
2960         } else if (clear_area) {
2961 #ifdef WITH_WARNINGS
2962 #warning Should be fixed with a lyxinset::clear_width(bv, font) function! (Jug)
2963 #warning Should we not fix this in the Painter, please have a look Lars! (Jug)
2964 #endif
2965                 int const y = y_offset < 0 ? 0 : y_offset;
2966                 int const h = y_offset < 0 ?
2967                         row_ptr->height() + y_offset : row_ptr->height();
2968                 int const w = inset_owner ?
2969                         inset_owner->width(bview, font) - 2 : ww;
2970                 int const x = x_offset;
2971                 pain.fillRectangle(x, y, w, h, backgroundColor());
2972         } else if (inset != 0) {
2973                 int h = row_ptr->baseline() - inset->ascent(bview, font);
2974                 // first clear the whole row above the inset!
2975                 if (h > 0) {
2976 #if 0
2977                         int const w = (inset_owner ?
2978                                  inset_owner->width(bview, font) : ww);
2979 #endif
2980                         pain.fillRectangle(x_offset, y_offset, ww, h,
2981                                            backgroundColor());
2982                 }
2983                 h += inset->ascent(bview, font) + inset->descent(bview, font);
2984                 // clear the space below the inset!
2985                 if ((row_ptr->height() - h) > 0) {
2986 #if 0
2987                         int const w = (inset_owner ?
2988                                  inset_owner->width(bview, font) : ww);
2989 #endif
2990                         pain.fillRectangle(x_offset, y_offset + h,
2991                                            ww, row_ptr->height() - h,
2992                                            backgroundColor());
2993                 }
2994                 // clear the space behind the inset, if needed
2995                 if (!inset_owner && !inset->display() && !inset->needFullRow())
2996                 {
2997                         int const w = inset->width(bview, font) + int(x);
2998                         pain.fillRectangle(w, y_offset,
2999                                            ww - w, row_ptr->height(),
3000                                            backgroundColor());
3001                 }
3002         }
3003
3004         if (selection.set()) {
3005                 int const w = (inset_owner ?
3006                                inset_owner->width(bview, font) : ww);
3007                 // selection code
3008                 if (bidi_same_direction) {
3009                         if (selection.start.row() == row_ptr &&
3010                             selection.end.row() == row_ptr) {
3011                                 if (selection.start.x() < selection.end.x())
3012                                         pain.fillRectangle(x_offset + selection.start.x(),
3013                                                            y_offset,
3014                                                            selection.end.x() - selection.start.x(),
3015                                                            row_ptr->height(),
3016                                                            LColor::selection);
3017                                 else
3018                                         pain.fillRectangle(x_offset + selection.end.x(),
3019                                                            y_offset,
3020                                                            selection.start.x() - selection.end.x(),
3021                                                            row_ptr->height(),
3022                                                            LColor::selection);
3023                         } else if (selection.start.row() == row_ptr) {
3024                                 if (is_rtl)
3025                                         pain.fillRectangle(x_offset, y_offset,
3026                                                            selection.start.x(),
3027                                                            row_ptr->height(),
3028                                                            LColor::selection);
3029                                 else
3030                                         pain.fillRectangle(x_offset + selection.start.x(),
3031                                                            y_offset,
3032                                                            w - selection.start.x(),
3033                                                            row_ptr->height(),
3034                                                            LColor::selection);
3035                         } else if (selection.end.row() == row_ptr) {
3036                                 if (is_rtl)
3037                                         pain.fillRectangle(x_offset + selection.end.x(),
3038                                                            y_offset,
3039                                                            w - selection.end.x(),
3040                                                            row_ptr->height(),
3041                                                            LColor::selection);
3042                                 else
3043                                         pain.fillRectangle(x_offset, y_offset,
3044                                                            selection.end.x(),
3045                                                            row_ptr->height(),
3046                                                            LColor::selection);
3047                         } else if (y > selection.start.y()
3048                                    && y < selection.end.y()) {
3049                                 pain.fillRectangle(x_offset, y_offset, w,
3050                                                    row_ptr->height(),
3051                                                    LColor::selection);
3052                         }
3053                 } else if (selection.start.row() != row_ptr &&
3054                             selection.end.row() != row_ptr &&
3055                             y > selection.start.y()
3056                             && y < selection.end.y()) {
3057                         pain.fillRectangle(x_offset, y_offset, w,
3058                                            row_ptr->height(),
3059                                            LColor::selection);
3060                 } else if (selection.start.row() == row_ptr ||
3061                            selection.end.row() == row_ptr) {
3062                         float tmpx = x;
3063                         if ((selection.start.row() != row_ptr && !is_rtl) ||
3064                              (selection.end.row() != row_ptr && is_rtl))
3065                                 pain.fillRectangle(x_offset, y_offset,
3066                                                    int(tmpx),
3067                                                    row_ptr->height(),
3068                                                    LColor::selection);
3069                         Paragraph::size_type main_body =
3070                                 beginningOfMainBody(bview->buffer(),
3071                                                     row_ptr->par());
3072
3073                         for (vpos = row_ptr->pos(); vpos <= last; ++vpos)  {
3074                                 pos = vis2log(vpos);
3075                                 float const old_tmpx = tmpx;
3076                                 if (main_body > 0 && pos == main_body-1) {
3077                                         tmpx += fill_label_hfill +
3078                                                 lyxfont::width(textclasslist.Style(bview->buffer()->params.textclass,
3079                                                                                    row_ptr->par()->getLayout()).labelsep,
3080                                                                getFont(bview->buffer(),row_ptr->par(), -2));
3081                                         if (row_ptr->par()->isLineSeparator(main_body-1))
3082                                                 tmpx -= singleWidth(bview, row_ptr->par(), main_body-1);
3083                                 }
3084                                 if (hfillExpansion(bview->buffer(), row_ptr, pos)) {
3085                                         tmpx += singleWidth(bview, row_ptr->par(), pos);
3086                                         if (pos >= main_body)
3087                                                 tmpx += fill_hfill;
3088                                         else
3089                                                 tmpx += fill_label_hfill;
3090                                 }
3091                                 else if (row_ptr->par()->isSeparator(pos)) {
3092                                         tmpx += singleWidth(bview, row_ptr->par(), pos);
3093                                         if (pos >= main_body)
3094                                                 tmpx += fill_separator;
3095                                 } else
3096                                         tmpx += singleWidth(bview, row_ptr->par(), pos);
3097
3098                                 if ((selection.start.row() != row_ptr ||
3099                                       selection.start.pos() <= pos) &&
3100                                      (selection.end.row() != row_ptr ||
3101                                       pos < selection.end.pos()) )
3102                                         // Here we do not use x_offset as x_offset was
3103                                         // added to x.
3104                                         pain.fillRectangle(int(old_tmpx),
3105                                                            y_offset,
3106                                                            int(tmpx - old_tmpx + 1),
3107                                                            row_ptr->height(),
3108                                                            LColor::selection);
3109                         }
3110
3111                         if ((selection.start.row() != row_ptr && is_rtl) ||
3112                              (selection.end.row() != row_ptr && !is_rtl) )
3113                                 pain.fillRectangle(x_offset + int(tmpx),
3114                                                    y_offset,
3115                                                    int(ww - tmpx),
3116                                                    row_ptr->height(),
3117                                                    LColor::selection);
3118                 }
3119         }
3120
3121         int box_x = 0;
3122
3123         // Draw appendix lines
3124         Paragraph * firstpar = row_ptr->par();
3125
3126         if (firstpar->params().appendix()) {
3127                 pain.line(1, y_offset,
3128                           1, y_offset + row_ptr->height(),
3129                           LColor::appendixline);
3130                 pain.line(ww - 2, y_offset,
3131                           ww - 2, y_offset + row_ptr->height(),
3132                           LColor::appendixline);
3133         }
3134
3135         // Draw depth lines
3136         Paragraph::depth_type const depth = firstpar->getDepth();
3137         if (depth > 0) {
3138                 Paragraph::depth_type next_depth = 0;
3139                 Paragraph::depth_type prev_depth = 0;
3140                 if (row_ptr->next())
3141                                 next_depth = row_ptr->next()->par()->getDepth();
3142                 if (row_ptr->previous())
3143                                 prev_depth = row_ptr->previous()->par()->getDepth();
3144
3145                 for (Paragraph::depth_type i = 1; i <= depth; ++i) {
3146                         int const line_x = (LYX_PAPER_MARGIN / 5) *
3147                                 i + box_x + x_offset;
3148                         pain.line(line_x, y_offset, line_x,
3149                                   y_offset + row_ptr->height() - 1 - (i - next_depth - 1) * 3,
3150                                   LColor::depthbar);
3151
3152                         if (i > prev_depth)
3153                                 pain.fillRectangle(line_x, y_offset, LYX_PAPER_MARGIN / 5, 2,
3154                                                    LColor::depthbar);
3155                         if (i > next_depth)
3156                                 pain.fillRectangle(line_x,
3157                                                    y_offset + row_ptr->height() - 2 - (i - next_depth - 1) * 3,
3158                                                    LYX_PAPER_MARGIN / 5, 2,
3159                                                    LColor::depthbar);
3160                 }
3161         }
3162
3163
3164         LyXLayout const & layout =
3165                 textclasslist.Style(bview->buffer()->params.textclass,
3166                                     row_ptr->par()->getLayout());
3167
3168         int y_top = 0;
3169         int y_bottom = row_ptr->height();
3170
3171         // is it a first row?
3172         if (!row_ptr->pos() && (row_ptr->par() == firstpar)) {
3173
3174                 // start of appendix?
3175                 if (row_ptr->par()->params().startOfAppendix()) {
3176                         pain.line(1, y_offset,
3177                                   ww - 2, y_offset,
3178                                   LColor::appendixline);
3179                 }
3180
3181                 // think about the margins
3182                 if (!row_ptr->previous() && bv_owner)
3183                         y_top += LYX_PAPER_MARGIN;
3184
3185                 // draw a top pagebreak
3186                 if (row_ptr->par()->params().pagebreakTop()) {
3187                         LyXFont pb_font;
3188                         pb_font.setColor(LColor::pagebreak).decSize();
3189                         int w = 0;
3190                         int a = 0;
3191                         int d = 0;
3192                         pain.line(0, y_offset + y_top + 2*defaultHeight(),
3193                                   ww,
3194                                   y_offset + y_top + 2 * defaultHeight(),
3195                                   LColor::pagebreak,
3196                                   Painter::line_onoffdash);
3197                         lyxfont::rectText(_("Page Break (top)"), pb_font,
3198                                           w, a, d);
3199                         pain.rectText((ww - w)/2,
3200                                       y_offset + y_top + 2 * defaultHeight() + d,
3201                                       _("Page Break (top)"),
3202                                       pb_font,
3203                                       backgroundColor(),
3204                                       backgroundColor());
3205                         y_top += 3 * defaultHeight();
3206                 }
3207
3208                 if (row_ptr->par()->params().spaceTop().kind() == VSpace::VFILL) {
3209                         // draw a vfill top
3210                         pain.line(0, y_offset + 2 + y_top,
3211                                   LYX_PAPER_MARGIN, y_offset + 2 + y_top,
3212                                   LColor::vfillline);
3213
3214                         pain.line(0, y_offset + y_top + 3 * defaultHeight(),
3215                                   LYX_PAPER_MARGIN,
3216                                   y_offset + y_top + 3 * defaultHeight(),
3217                                   LColor::vfillline);
3218
3219                         pain.line(LYX_PAPER_MARGIN / 2, y_offset + 2 + y_top,
3220                                   LYX_PAPER_MARGIN / 2,
3221                                   y_offset + y_top + 3 * defaultHeight(),
3222                                   LColor::vfillline);
3223
3224                         y_top += 3 * defaultHeight();
3225                 }
3226
3227                 // think about user added space
3228                 y_top += int(row_ptr->par()->params().spaceTop().inPixels(bview));
3229
3230                 // think about the parskip
3231                 // some parskips VERY EASY IMPLEMENTATION
3232                 if (bview->buffer()->params.paragraph_separation == BufferParams::PARSEP_SKIP) {
3233                         if (layout.latextype == LATEX_PARAGRAPH
3234                             && firstpar->getDepth() == 0
3235                             && firstpar->previous())
3236                                 y_top += bview->buffer()->params.getDefSkip().inPixels(bview);
3237                         else if (firstpar->previous()
3238                                  && textclasslist.Style(bview->buffer()->params.textclass,
3239                                                         firstpar->previous()->getLayout()).latextype == LATEX_PARAGRAPH
3240                                  && firstpar->previous()->getDepth() == 0)
3241                                 // is it right to use defskip here, too? (AS)
3242                                 y_top += bview->buffer()->params.getDefSkip().inPixels(bview);
3243                 }
3244
3245                 if (row_ptr->par()->params().lineTop()) {
3246                         // draw a top line
3247                         y_top +=  lyxfont::ascent('x',
3248                                                   getFont(bview->buffer(),
3249                                                           row_ptr->par(), 0));
3250                         int const w = (inset_owner ?
3251                                        inset_owner->width(bview, font) : ww);
3252                         int const xp = static_cast<int>(inset_owner ? x : 0);
3253                         pain.line(xp, y_offset + y_top,
3254                                   w, y_offset + y_top,
3255                                   LColor::topline,
3256                                   Painter::line_solid,
3257                                   Painter::line_thick);
3258
3259                         y_top +=  lyxfont::ascent('x',getFont(bview->buffer(),
3260                                                               row_ptr->par(), 0));
3261                 }
3262
3263                 // should we print a label?
3264                 if (layout.labeltype >= LABEL_STATIC
3265                     && (layout.labeltype != LABEL_STATIC
3266                         || layout.latextype != LATEX_ENVIRONMENT
3267                         || row_ptr->par()->isFirstInSequence())) {
3268                         font = getFont(bview->buffer(), row_ptr->par(), -2);
3269                         if (!row_ptr->par()->getLabelstring().empty()) {
3270                                 tmpx = x;
3271                                 string const tmpstring =
3272                                         row_ptr->par()->getLabelstring();
3273
3274                                 if (layout.labeltype == LABEL_COUNTER_CHAPTER) {
3275                                         if (bview->buffer()->params.secnumdepth >= 0) {
3276                                                 // this is special code for
3277                                                 // the chapter layout. This is
3278                                                 // printed in an extra row
3279                                                 // and has a pagebreak at
3280                                                 // the top.
3281                                                 float spacing_val = 1.0;
3282                                                 if (!row_ptr->par()->params().spacing().isDefault()) {
3283                                                         spacing_val = row_ptr->par()->params().spacing().getValue();
3284                                                 } else {
3285                                                         spacing_val = bview->buffer()->params.spacing.getValue();
3286                                                 }
3287
3288                                                 maxdesc = int(lyxfont::maxDescent(font) * layout.spacing.getValue() * spacing_val)
3289                                                         + int(layout.parsep) * defaultHeight();
3290                                                 if (is_rtl)
3291                                                         tmpx = ww - leftMargin(bview, row_ptr) -
3292                                                                 lyxfont::width(tmpstring, font);
3293                                                 pain.text(int(tmpx),
3294                                                           y_offset + row_ptr->baseline() - row_ptr->ascent_of_text() - maxdesc,
3295                                                           tmpstring, font);
3296                                         }
3297                                 } else {
3298                                         if (is_rtl) {
3299                                                 tmpx = ww - leftMargin(bview, row_ptr)
3300                                                         + lyxfont::width(layout.labelsep, font);
3301                                         } else
3302                                                 tmpx = x - lyxfont::width(layout.labelsep, font)
3303                                                         - lyxfont::width(tmpstring, font);
3304
3305                                         // draw it!
3306                                         pain.text(int(tmpx),
3307                                                   y_offset + row_ptr->baseline(),
3308                                                   tmpstring, font);
3309                                 }
3310                         }
3311                         // the labels at the top of an environment.
3312                         // More or less for bibliography
3313                 } else if (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
3314                            layout.labeltype == LABEL_BIBLIO ||
3315                            layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
3316                         if (row_ptr->par()->isFirstInSequence()) {
3317                                 font = getFont(bview->buffer(),
3318                                                row_ptr->par(), -2);
3319                                 if (!row_ptr->par()->getLabelstring().empty()) {
3320                                         string const tmpstring =
3321                                                 row_ptr->par()->getLabelstring();
3322                                         float spacing_val = 1.0;
3323                                         if (!row_ptr->par()->params().spacing().isDefault()) {
3324                                                 spacing_val = row_ptr->par()->params().spacing().getValue();
3325                                         } else {
3326                                                 spacing_val = bview->buffer()->params.spacing.getValue();
3327                                         }
3328
3329                                         maxdesc = int(lyxfont::maxDescent(font) * layout.spacing.getValue() * spacing_val
3330                                                       + (layout.labelbottomsep * defaultHeight()));
3331
3332                                         tmpx = x;
3333                                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT){
3334                                                 tmpx = ( (is_rtl ? leftMargin(bview, row_ptr) : x)
3335                                                          + ww - rightMargin(bview->buffer(), row_ptr) ) / 2;
3336                                                 tmpx -= lyxfont::width(tmpstring, font) / 2;
3337                                         } else if (is_rtl)
3338                                                 tmpx = ww - leftMargin(bview, row_ptr) -
3339                                                         lyxfont::width(tmpstring, font);
3340                                         pain.text(int(tmpx),
3341                                                   y_offset + row_ptr->baseline()
3342                                                   - row_ptr->ascent_of_text()
3343                                                   - maxdesc,
3344                                                   tmpstring, font);
3345                                 }
3346                         }
3347                 }
3348                 if (layout.labeltype == LABEL_BIBLIO && row_ptr->par()->bibkey) {
3349                         font = getFont(bview->buffer(), row_ptr->par(), -1);
3350                         if (is_rtl)
3351                                 tmpx = ww - leftMargin(bview, row_ptr)
3352                                         + lyxfont::width(layout.labelsep, font);
3353                         else
3354                                 tmpx = x - lyxfont::width(layout.labelsep, font)
3355                                         - row_ptr->par()->bibkey->width(bview, font);
3356                         row_ptr->par()->bibkey->draw(bview, font,
3357                                                    y_offset + row_ptr->baseline(),
3358                                                    tmpx, clear_area);
3359                 }
3360         }
3361
3362         // is it a last row?
3363         Paragraph * par = row_ptr->par();
3364         if (row_ptr->par() == par
3365             && (!row_ptr->next() || row_ptr->next()->par() != row_ptr->par())) {
3366                 // think about the margins
3367                 if (!row_ptr->next() && bv_owner)
3368                         y_bottom -= LYX_PAPER_MARGIN;
3369
3370                 // draw a bottom pagebreak
3371                 if (firstpar->params().pagebreakBottom()) {
3372                         LyXFont pb_font;
3373                         pb_font.setColor(LColor::pagebreak).decSize();
3374                         int const y_place = y_offset + y_bottom
3375                                 - 2 * defaultHeight();
3376
3377                         int w = 0;
3378                         int a = 0;
3379                         int d = 0;
3380                         pain
3381                                 .line(0, y_place, ww, y_place,
3382                                       LColor::pagebreak,
3383                                       Painter::line_onoffdash);
3384                         lyxfont::rectText(_("Page Break (bottom)"), pb_font,
3385                                           w, a, d);
3386                         pain.rectText((ww - w) / 2, y_place + d,
3387                                       _("Page Break (bottom)"),
3388                                       pb_font,
3389                                       backgroundColor(),
3390                                       backgroundColor());
3391                         y_bottom -= 3 * defaultHeight();
3392                 }
3393
3394                 if (firstpar->params().spaceBottom().kind() == VSpace::VFILL) {
3395                         // draw a vfill bottom
3396                         int const y_place = y_offset + y_bottom
3397                                 - 3 * defaultHeight();
3398
3399                         pain.line(0, y_place,
3400                                   LYX_PAPER_MARGIN, y_place,
3401                                   LColor::vfillline);
3402                         pain.line(0, y_offset + y_bottom - 2,
3403                                   LYX_PAPER_MARGIN,
3404                                   y_offset + y_bottom - 2,
3405                                   LColor::vfillline);
3406                         pain.line(LYX_PAPER_MARGIN / 2,
3407                                   y_place,
3408                                   LYX_PAPER_MARGIN / 2,
3409                                   y_offset + y_bottom - 2,
3410                                   LColor::vfillline);
3411                         y_bottom -= 3 * defaultHeight();
3412                 }
3413
3414                 // think about user added space
3415                 y_bottom -= int(firstpar->params().spaceBottom().inPixels(bview));
3416
3417                 if (firstpar->params().lineBottom()) {
3418                         // draw a bottom line
3419                         y_bottom -= lyxfont::ascent('x',
3420                                                     getFont(bview->buffer(),
3421                                                             par,
3422                                                             par->size() - 1));
3423                         int const w = (inset_owner ?
3424                                        inset_owner->width(bview, font) : ww);
3425                         int const xp = static_cast<int>(inset_owner ? x : 0);
3426                         pain.line(xp, y_offset + y_bottom,
3427                                   w, y_offset + y_bottom,
3428                                   LColor::topline, Painter::line_solid,
3429                                   Painter::line_thick);
3430                         y_bottom -= lyxfont::ascent('x',
3431                                                     getFont(bview->buffer(),
3432                                                             par,
3433                                                             par->size() - 1));
3434                 }
3435
3436                 // draw an endlabel
3437                 int const endlabel =
3438                         row_ptr->par()->getEndLabel(bview->buffer()->params);
3439                 switch (endlabel) {
3440                 case END_LABEL_BOX:
3441                 case END_LABEL_FILLED_BOX:
3442                 {
3443                         LyXFont const font = getFont(bview->buffer(),
3444                                                      row_ptr->par(), last);
3445                         int const size = int(0.75 * lyxfont::maxAscent(font));
3446                         int const y = (y_offset + row_ptr->baseline()) - size;
3447                         int x = is_rtl ? LYX_PAPER_MARGIN
3448                                 : ww - LYX_PAPER_MARGIN - size;
3449
3450                         if (row_ptr->fill() <= size)
3451                                 x += (size - row_ptr->fill() + 1) * (is_rtl ? -1 : 1);
3452                         if (endlabel == END_LABEL_BOX) {
3453                                 pain.line(x, y, x, y + size,
3454                                           LColor::eolmarker);
3455                                 pain.line(x + size, y, x + size , y + size,
3456                                           LColor::eolmarker);
3457                                 pain.line(x, y, x + size, y,
3458                                           LColor::eolmarker);
3459                                 pain.line(x, y + size, x + size, y + size,
3460                                           LColor::eolmarker);
3461                         } else
3462                                 pain.fillRectangle(x, y, size, size,
3463                                                    LColor::eolmarker);
3464                         break;
3465                 }
3466                 case END_LABEL_STATIC:
3467                 {
3468                         LyXTextClass::LayoutList::size_type layout = row_ptr->par()->getLayout();
3469                         string const tmpstring = textclasslist.
3470                                 Style(bview->buffer()->params.textclass,
3471                                       layout).endlabelstring();
3472                         font = getFont(bview->buffer(), row_ptr->par(), -2);
3473                         int const tmpx = is_rtl ?
3474                                 int(x) - lyxfont::width(tmpstring, font)
3475                                 : ww - rightMargin(bview->buffer(), row_ptr) - row_ptr->fill();
3476                         pain.text( tmpx, y_offset + row_ptr->baseline(), tmpstring, font);
3477                         break;
3478                 }
3479                 case END_LABEL_NO_LABEL:
3480                         break;
3481                 }
3482         }
3483
3484         // draw the text in the pixmap
3485
3486         vpos = row_ptr->pos();
3487
3488         Paragraph::size_type main_body =
3489                 beginningOfMainBody(bview->buffer(), row_ptr->par());
3490         if (main_body > 0 &&
3491             (main_body-1 > last ||
3492              !row_ptr->par()->isLineSeparator(main_body - 1)))
3493                 main_body = 0;
3494
3495         while (vpos <= last)  {
3496                 pos = vis2log(vpos);
3497                 if (main_body > 0 && pos == main_body - 1) {
3498                         x += fill_label_hfill
3499                                 + lyxfont::width(layout.labelsep,
3500                                                  getFont(bview->buffer(),
3501                                                          row_ptr->par(), -2))
3502                                 - singleWidth(bview,
3503                                               row_ptr->par(),
3504                                               main_body - 1);
3505                 }
3506
3507                 if (row_ptr->par() ->isHfill(pos)) {
3508                         x += 1;
3509                         pain.line(int(x),
3510                                   y_offset + row_ptr->baseline() - defaultHeight() / 2,
3511                                   int(x),
3512                                   y_offset + row_ptr->baseline(),
3513                                   LColor::vfillline);
3514
3515                         if (hfillExpansion(bview->buffer(),
3516                                            row_ptr, pos)) {
3517                                 if (pos >= main_body) {
3518                                         pain.line(int(x),
3519                                                   y_offset + row_ptr->baseline() - defaultHeight() / 4,
3520                                                   int(x + fill_hfill),
3521                                                   y_offset + row_ptr->baseline() - defaultHeight() / 4,
3522                                                   LColor::vfillline,
3523                                                   Painter::line_onoffdash);
3524                                         x += fill_hfill;
3525                                 } else {
3526                                         pain.line(int(x),
3527                                                   y_offset + row_ptr->baseline() - defaultHeight() / 4,
3528                                                   int(x + fill_label_hfill),
3529                                                   y_offset + row_ptr->baseline() - defaultHeight() / 4,
3530                                                   LColor::vfillline,
3531                                                   Painter::line_onoffdash);
3532
3533                                         x += fill_label_hfill;
3534                                 }
3535                                 pain.line(int(x),
3536                                           y_offset + row_ptr->baseline() - defaultHeight() / 2,
3537                                           int(x),
3538                                           y_offset + row_ptr->baseline(),
3539                                           LColor::vfillline);
3540                         }
3541                         x += 2;
3542                         ++vpos;
3543                 } else if (row_ptr->par()->isSeparator(pos)) {
3544                         x += singleWidth(bview,
3545                                          row_ptr->par(), pos);
3546                         if (pos >= main_body)
3547                                 x += fill_separator;
3548                         ++vpos;
3549                 } else
3550                         draw(bview, row_ptr, vpos, y_offset, x, clear_area);
3551         }
3552 }
3553
3554
3555 int LyXText::defaultHeight() const
3556 {
3557         LyXFont font(LyXFont::ALL_SANE);
3558         return int(lyxfont::maxAscent(font) + lyxfont::maxDescent(font) * 1.5);
3559 }
3560
3561
3562 /* returns the column near the specified x-coordinate of the row
3563 * x is set to the real beginning of this column  */
3564 int LyXText::getColumnNearX(BufferView * bview, Row * row, int & x,
3565                             bool & boundary) const
3566 {
3567         float tmpx = 0.0;
3568         float fill_separator;
3569         float fill_hfill;
3570         float fill_label_hfill;
3571
3572         prepareToPrint(bview, row, tmpx, fill_separator,
3573                        fill_hfill, fill_label_hfill);
3574
3575         Paragraph::size_type vc = row->pos();
3576         Paragraph::size_type last = rowLastPrintable(row);
3577         Paragraph::size_type c = 0;
3578         LyXLayout const & layout =
3579                 textclasslist.Style(bview->buffer()->params.textclass,
3580                                     row->par()->getLayout());
3581         bool left_side = false;
3582
3583         Paragraph::size_type
3584                 main_body = beginningOfMainBody(bview->buffer(), row->par());
3585         float last_tmpx = tmpx;
3586
3587         if (main_body > 0 &&
3588             (main_body - 1 > last ||
3589              !row->par()->isLineSeparator(main_body - 1)))
3590                 main_body = 0;
3591
3592         while (vc <= last && tmpx <= x) {
3593                 c = vis2log(vc);
3594                 last_tmpx = tmpx;
3595                 if (main_body > 0 && c == main_body-1) {
3596                         tmpx += fill_label_hfill +
3597                                 lyxfont::width(layout.labelsep,
3598                                                getFont(bview->buffer(), row->par(), -2));
3599                         if (row->par()->isLineSeparator(main_body - 1))
3600                                 tmpx -= singleWidth(bview, row->par(), main_body-1);
3601                 }
3602
3603                 if (hfillExpansion(bview->buffer(), row, c)) {
3604                         x += singleWidth(bview, row->par(), c);
3605                         if (c >= main_body)
3606                                 tmpx += fill_hfill;
3607                         else
3608                                 tmpx += fill_label_hfill;
3609                 }
3610                 else if (row->par()->isSeparator(c)) {
3611                         tmpx += singleWidth(bview, row->par(), c);
3612                         if (c >= main_body)
3613                                 tmpx+= fill_separator;
3614                 } else
3615                         tmpx += singleWidth(bview, row->par(), c);
3616                 ++vc;
3617         }
3618
3619         if ((tmpx + last_tmpx) / 2 > x) {
3620                 tmpx = last_tmpx;
3621                 left_side = true;
3622         }
3623
3624         if (vc > last + 1)  // This shouldn't happen.
3625                 vc = last + 1;
3626
3627         boundary = false;
3628         bool const lastrow = lyxrc.rtl_support // This is not needed, but gives
3629                                          // some speedup if rtl_support=false
3630                 && (!row->next() || row->next()->par() != row->par());
3631         bool const rtl = (lastrow)
3632                 ? row->par()->isRightToLeftPar(bview->buffer()->params)
3633                 : false; // If lastrow is false, we don't need to compute
3634                          // the value of rtl.
3635
3636         if (row->pos() > last)  // Row is empty?
3637                 c = row->pos();
3638         else if (lastrow &&
3639                  ( ( rtl &&  left_side && vc == row->pos() && x < tmpx - 5) ||
3640                    (!rtl && !left_side && vc == last + 1   && x > tmpx + 5) ))
3641                 c = last + 1;
3642         else if (vc == row->pos()) {
3643                 c = vis2log(vc);
3644                 if (bidi_level(c) % 2 == 1)
3645                         ++c;
3646         } else {
3647                 c = vis2log(vc - 1);
3648                 bool const rtl = (bidi_level(c) % 2 == 1);
3649                 if (left_side == rtl) {
3650                         ++c;
3651                         boundary = isBoundary(bview->buffer(), row->par(), c);
3652                 }
3653         }
3654
3655         if (row->pos() <= last && c > last
3656             && row->par()->isNewline(last)) {
3657                 if (bidi_level(last) % 2 == 0)
3658                         tmpx -= singleWidth(bview, row->par(), last);
3659                 else
3660                         tmpx += singleWidth(bview, row->par(), last);
3661                 c = last;
3662         }
3663
3664         c -= row->pos();
3665         x = int(tmpx);
3666         return c;
3667 }
3668
3669
3670 // returns pointer to a specified row
3671 Row * LyXText::getRow(Paragraph * par,
3672                       Paragraph::size_type pos, int & y) const
3673 {
3674         if (!firstrow)
3675                 return 0;
3676
3677         Row * tmprow = firstrow;
3678         y = 0;
3679
3680         // find the first row of the specified paragraph
3681         while (tmprow->next() && tmprow->par() != par) {
3682                 y += tmprow->height();
3683                 tmprow = tmprow->next();
3684         }
3685
3686         // now find the wanted row
3687         while (tmprow->pos() < pos
3688                && tmprow->next()
3689                && tmprow->next()->par() == par
3690                && tmprow->next()->pos() <= pos) {
3691                 y += tmprow->height();
3692                 tmprow = tmprow->next();
3693         }
3694
3695         return tmprow;
3696 }