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                         if (!need_break_row && !inset_owner &&
 444                             bview->text->status() == CHANGED_IN_DRAW)
 445                         {
 446                                 if (row->previous() && row->previous()->par() == row->par())
 447                                         breakAgainOneRow(bview, row->previous());
 448                                 setCursor(bview, cursor.par(), cursor.pos());
 449                                 need_break_row = const_cast<Row *>(row);
 450                         }
 451                 }
 452                 ++vpos;
 453
 454                 if (lyxrc.mark_foreign_language &&
 455                         font.language() != latex_language &&
 456                     font.language() != bview->buffer()->params.language) {
 457                         int const y = offset + row->height() - 1;
 458                         pain.line(int(tmpx), y, int(x), y, LColor::language);
 459                 }
 460
 461                 return;
 462         }
 463
 464         /* usual characters, no insets */
 465
 466         // Collect character that we can draw in one command
 467
 468         // This is dirty, but fast. Notice that it will never be too small.
 469         // For the record, I'll note that Microsoft Word has a limit
 470         // of 768 here. We have none :-) (Asger)
 471         // Ok. I am the first to admit that the use of std::string will be
 472         // a tiny bit slower than using a POD char array. However, I claim
 473         // that this slowdown is so small that it is close to inperceptive.
 474         // So IMHO we should go with the easier and clearer implementation.
 475         // And even if 1024 is a large number here it might overflow, string
 476         // will only overflow if the machine is out of memory...
 477         static string textstring;
 478         textstring = c;
 479         ++vpos;
 480
 481         Paragraph::size_type const last = rowLastPrintable(row);
 482
 483         if (font.language()->lang() == "hebrew") {
 484                 if (Encodings::IsComposeChar_hebrew(c)) {
 485                         int const width = lyxfont::width(c, font2);
 486                         int dx = 0;
 487                         for (Paragraph::size_type i = pos-1; i >= 0; --i) {
 488                                 c = row->par()->getChar(i);
 489                                 if (!Encodings::IsComposeChar_hebrew(c)) {
 490                                         if (IsPrintableNonspace(c)) {
 491                                                 int const width2 =
 492                                                         singleWidth(bview,
 493                                                                     row->par(),
 494                                                                     i, c);
 495                                                 dx = (c == 'ø' || c == 'ã') // dalet / resh
 496                                                         ? width2 - width : (width2 - width) / 2;
 497                                         }
 498                                         break;
 499                                 }
 500                         }
 501                         // Draw nikud
 502                         pain.text(int(x) + dx, offset + row->baseline(),
 503                                   textstring, font);
 504                 } else {
 505                         while (vpos <= last &&
 506                                (pos = vis2log(vpos)) >= 0
 507                                && IsPrintableNonspace(c = row->par()->getChar(pos))
 508                                && !Encodings::IsComposeChar_hebrew(c)
 509                                && font2 == getFont(bview->buffer(), row->par(), pos)) {
 510                                 textstring += c;
 511                                 ++vpos;
 512                         }
 513                         // Draw text and set the new x position
 514                         pain.text(int(x), offset + row->baseline(),
 515                                   textstring, font);
 516                         x += lyxfont::width(textstring, font);
 517                 }
 518         } else if (font.language()->lang() == "arabic" &&
 519                    (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 520                     lyxrc.font_norm_type == LyXRC::ISO_10646_1)) {
 521                 if (Encodings::IsComposeChar_arabic(c)) {
 522                         c = transformChar(c, row->par(), pos);
 523                         textstring = c;
 524                         int const width = lyxfont::width(c, font2);
 525                         int dx = 0;
 526                         for (Paragraph::size_type i = pos-1; i >= 0; --i) {
 527                                 c = row->par()->getChar(i);
 528                                 if (!Encodings::IsComposeChar_arabic(c)) {
 529                                         if (IsPrintableNonspace(c)) {
 530                                                 int const width2 =
 531                                                         singleWidth(bview,
 532                                                                     row->par(),
 533                                                                     i, c);
 534                                                 dx = (width2 - width) / 2;
 535                                         }
 536                                         break;
 537                                 }
 538                         }
 539                         // Draw nikud
 540                         pain.text(int(x) + dx, offset + row->baseline(),
 541                                   textstring, font);
 542                 } else {
 543                         textstring = transformChar(c, row->par(), pos);
 544                         while (vpos <= last &&
 545                                (pos = vis2log(vpos)) >= 0
 546                                && IsPrintableNonspace(c = row->par()->getChar(pos))
 547                                && !Encodings::IsComposeChar_arabic(c)
 548                                && font2 == getFont(bview->buffer(), row->par(), pos)) {
 549                                 c = transformChar(c, row->par(), pos);
 550                                 textstring += c;
 551                                 ++vpos;
 552                         }
 553                         // Draw text and set the new x position
 554                         pain.text(int(x), offset + row->baseline(),
 555                                   textstring, font);
 556                         x += lyxfont::width(textstring, font);
 557                 }
 558         } else {
 559                 while (vpos <= last &&
 560                        (pos = vis2log(vpos)) >= 0
 561                        && IsPrintableNonspace(c = row->par()->getChar(pos))
 562                        && font2 == getFont(bview->buffer(), row->par(), pos)) {
 563                         textstring += c;
 564                         ++vpos;
 565                 }
 566                 // Draw text and set the new x position
 567                 pain.text(int(x), offset + row->baseline(), textstring, font);
 568                 x += lyxfont::width(textstring, font);
 569         }
 570
 571 #ifdef INHERIT_LANGUAGE
 572 #ifdef WITH_WARNINGS
 573         if ((font.language() == inherit_language) ||
 574                 (font.language() == ignore_language))
 575                 lyxerr << "No this shouldn't happen!\n";
 576 #endif
 577 #endif
 578         if (lyxrc.mark_foreign_language &&
 579             font.language() != latex_language &&
 580             font.language() != bview->buffer()->params.language) {
 581                 int const y = offset + row->height() - 1;
 582                 pain.line(int(tmpx), y, int(x), y,
 583                           LColor::language);
 584         }
 585
 586         // If we want ulem.sty support, drawing
 587         // routines should go here. (Asger)
 588         // Why shouldn't LyXFont::drawText handle it internally?
 589 }
 590
 591
 592 // Returns the left beginning of the text.
 593 // This information cannot be taken from the layouts-objekt, because in
 594 // LaTeX the beginning of the text fits in some cases (for example sections)
 595 // exactly the label-width.
 596 int LyXText::leftMargin(BufferView * bview, Row const * row) const
 597 {
 598         LyXLayout const & layout =
 599                 textclasslist.Style(bview->buffer()->params.textclass,
 600                                     row->par()->getLayout());
 601
 602         string parindent = layout.parindent;
 603
 604         int x = LYX_PAPER_MARGIN;
 605
 606         x += lyxfont::signedWidth(textclasslist
 607                                   .TextClass(bview->buffer()->params.textclass)
 608                                   .leftmargin(),
 609                                   textclasslist
 610                                   .TextClass(bview->buffer()->params.textclass)
 611                                   .defaultfont());
 612
 613         // this is the way, LyX handles the LaTeX-Environments.
 614         // I have had this idea very late, so it seems to be a
 615         // later added hack and this is true
 616         if (!row->par()->getDepth()) {
 617                 if (!row->par()->getLayout()) {
 618                         // find the previous same level paragraph
 619                         if (row->par()->previous()) {
 620                                 Paragraph * newpar = row->par()
 621                                         ->depthHook(row->par()->getDepth());
 622                                 if (newpar &&
 623                                     textclasslist.Style(bview->buffer()->params.textclass,
 624                                                         newpar->getLayout())
 625                                     .nextnoindent)
 626                                         parindent.erase();
 627                         }
 628                 }
 629         } else {
 630                 // find the next level paragraph
 631
 632                 Paragraph * newpar =
 633                         row->par()->outerHook();
 634
 635                 // make a corresponding row. Needed to call LeftMargin()
 636
 637                 // check wether it is a sufficent paragraph
 638                 if (newpar
 639                     && textclasslist
 640                         .Style(bview->buffer()->params.textclass,
 641                                newpar->getLayout()).isEnvironment()) {
 642                         Row dummyrow;
 643                         dummyrow.par(newpar);
 644                         dummyrow.pos(newpar->size());
 645                         x = leftMargin(bview, &dummyrow);
 646                 } else {
 647                         // this is no longer an error, because this function
 648                         // is used to clear impossible depths after changing
 649                         // a layout. Since there is always a redo,
 650                         // LeftMargin() is always called
 651                         row->par()->params().depth(0);
 652                 }
 653
 654                 if (newpar && !row->par()->getLayout()) {
 655                         if (newpar->params().noindent())
 656                                 parindent.erase();
 657                         else
 658                                 parindent = textclasslist
 659                                         .Style(bview->buffer()->params.textclass,
 660                                                newpar->getLayout()).parindent;
 661                 }
 662
 663         }
 664
 665         LyXFont const labelfont = getLabelFont(bview->buffer(), row->par());
 666         switch (layout.margintype) {
 667         case MARGIN_DYNAMIC:
 668                 if (!layout.leftmargin.empty()) {
 669                         x += lyxfont::signedWidth(layout.leftmargin,
 670                                                   textclasslist
 671                                                   .TextClass(bview->buffer()->params.
 672                                                              textclass)
 673                                                   .defaultfont());
 674                 }
 675                 if (!row->par()->getLabelstring().empty()) {
 676                         x += lyxfont::signedWidth(layout.labelindent,
 677                                                   labelfont);
 678                         x += lyxfont::width(row->par()->getLabelstring(),
 679                                             labelfont);
 680                         x += lyxfont::width(layout.labelsep, labelfont);
 681                 }
 682                 break;
 683         case MARGIN_MANUAL:
 684                 x += lyxfont::signedWidth(layout.labelindent, labelfont);
 685                 if (row->pos() >= beginningOfMainBody(bview->buffer(), row->par())) {
 686                         if (!row->par()->getLabelWidthString().empty()) {
 687                                 x += lyxfont::width(row->par()->getLabelWidthString(),
 688                                                labelfont);
 689                                 x += lyxfont::width(layout.labelsep, labelfont);
 690                         }
 691                 }
 692                 break;
 693         case MARGIN_STATIC:
 694                 x += lyxfont::signedWidth(layout.leftmargin, textclasslist.TextClass(bview->buffer()->params.textclass).defaultfont()) * 4
 695                         / (row->par()->getDepth() + 4);
 696                 break;
 697         case MARGIN_FIRST_DYNAMIC:
 698                 if (layout.labeltype == LABEL_MANUAL) {
 699                         if (row->pos() >= beginningOfMainBody(bview->buffer(), row->par())) {
 700                                 x += lyxfont::signedWidth(layout.leftmargin,
 701                                                           labelfont);
 702                         } else {
 703                                 x += lyxfont::signedWidth(layout.labelindent,
 704                                                           labelfont);
 705                         }
 706                 } else if (row->pos()
 707                            // Special case to fix problems with
 708                            // theorems (JMarc)
 709                            || (layout.labeltype == LABEL_STATIC
 710                                && layout.latextype == LATEX_ENVIRONMENT
 711                                && ! row->par()->isFirstInSequence())) {
 712                         x += lyxfont::signedWidth(layout.leftmargin,
 713                                                   labelfont);
 714                 } else if (layout.labeltype != LABEL_TOP_ENVIRONMENT
 715                            && layout.labeltype != LABEL_BIBLIO
 716                            && layout.labeltype !=
 717                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 718                         x += lyxfont::signedWidth(layout.labelindent,
 719                                                   labelfont);
 720                         x += lyxfont::width(layout.labelsep, labelfont);
 721                         x += lyxfont::width(row->par()->getLabelstring(),
 722                                             labelfont);
 723                 }
 724                 break;
 725
 726         case MARGIN_RIGHT_ADDRESS_BOX:
 727         {
 728                 // ok, a terrible hack. The left margin depends on the widest
 729                 // row in this paragraph. Do not care about footnotes, they
 730                 // are *NOT* allowed in the LaTeX realisation of this layout.
 731
 732                 // find the first row of this paragraph
 733                 Row const * tmprow = row;
 734                 while (tmprow->previous()
 735                        && tmprow->previous()->par() == row->par())
 736                         tmprow = tmprow->previous();
 737
 738                 int minfill = tmprow->fill();
 739                 while (tmprow->next() && tmprow->next()->par() == row->par()) {
 740                         tmprow = tmprow->next();
 741                         if (tmprow->fill() < minfill)
 742                                 minfill = tmprow->fill();
 743                 }
 744
 745                 x += lyxfont::signedWidth(layout.leftmargin,
 746                                           textclasslist
 747                                           .TextClass(bview->buffer()->params.textclass)
 748                                           .defaultfont());
 749                 x += minfill;
 750         }
 751         break;
 752         }
 753
 754         int align; // wrong type
 755
 756         if (row->par()->params().align() == LYX_ALIGN_LAYOUT)
 757                 align = layout.align;
 758         else
 759                 align = row->par()->params().align();
 760
 761         // set the correct parindent
 762         if (row->pos() == 0) {
 763                 if ((layout.labeltype == LABEL_NO_LABEL
 764                      || layout.labeltype == LABEL_TOP_ENVIRONMENT
 765                      || layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 766                      || (layout.labeltype == LABEL_STATIC
 767                          && layout.latextype == LATEX_ENVIRONMENT
 768                          && ! row->par()->isFirstInSequence()))
 769                     && align == LYX_ALIGN_BLOCK
 770                     && !row->par()->params().noindent()
 771                     && (row->par()->layout ||
 772                         bview->buffer()->params.paragraph_separation ==
 773                         BufferParams::PARSEP_INDENT))
 774                         x += lyxfont::signedWidth(parindent,
 775                                                   textclasslist
 776                                                   .TextClass(bview->buffer()->params
 777                                                              .textclass)
 778                                                   .defaultfont());
 779                 else if (layout.labeltype == LABEL_BIBLIO) {
 780                         // ale970405 Right width for bibitems
 781                         x += bibitemMaxWidth(bview,textclasslist
 782                                              .TextClass(bview->buffer()->params
 783                                                         .textclass)
 784                                              .defaultfont());
 785                 }
 786         }
 787         return x;
 788 }
 789
 790
 791 int LyXText::rightMargin(Buffer const * buf, Row const * row) const
 792 {
 793         LyXLayout const & layout =
 794                 textclasslist.Style(buf->params.textclass,
 795                                     row->par()->getLayout());
 796
 797         int x = LYX_PAPER_MARGIN
 798                 + lyxfont::signedWidth(textclasslist
 799                                        .TextClass(buf->params.textclass)
 800                                        .rightmargin(),
 801                                        textclasslist
 802                                        .TextClass(buf->params.textclass)
 803                                        .defaultfont());
 804
 805         // this is the way, LyX handles the LaTeX-Environments.
 806         // I have had this idea very late, so it seems to be a
 807         // later added hack and this is true
 808         if (row->par()->getDepth()) {
 809                 // find the next level paragraph
 810
 811                 Paragraph * newpar = row->par();
 812
 813                 do {
 814                         newpar = newpar->previous();
 815                 } while (newpar
 816                          && newpar->getDepth() >= row->par()->getDepth());
 817
 818                 // make a corresponding row. Needed to call LeftMargin()
 819
 820                 // check wether it is a sufficent paragraph
 821                 if (newpar
 822                     && textclasslist.Style(buf->params.textclass,
 823                                            newpar->getLayout())
 824                        .isEnvironment()) {
 825                         Row dummyrow;
 826                         dummyrow.par(newpar);
 827                         dummyrow.pos(0);
 828                         x = rightMargin(buf, &dummyrow);
 829                 } else {
 830                         // this is no longer an error, because this function
 831                         // is used to clear impossible depths after changing
 832                         // a layout. Since there is always a redo,
 833                         // LeftMargin() is always called
 834                         row->par()->params().depth(0);
 835                 }
 836         }
 837
 838         //lyxerr << "rightmargin: " << layout->rightmargin << endl;
 839         x += lyxfont::signedWidth(layout.rightmargin, textclasslist
 840                                   .TextClass(buf->params.textclass)
 841                                   .defaultfont()) * 4 / (row->par()->getDepth()
 842                                                          + 4);
 843         return x;
 844 }
 845
 846
 847 int LyXText::labelEnd(BufferView * bview, Row const * row) const
 848 {
 849         if (textclasslist.Style(bview->buffer()->params.textclass,
 850                                 row->par()->getLayout()).margintype
 851             == MARGIN_MANUAL) {
 852                 Row tmprow;
 853                 tmprow = *row;
 854                 tmprow.pos(row->par()->size());
 855                 return leftMargin(bview, &tmprow);  /* just the beginning
 856                                                 of the main body */
 857         } else
 858                 return 0;  /* LabelEnd is only needed, if the
 859                               layout fills a flushleft
 860                               label. */
 861 }
 862
 863
 864 // get the next breakpoint in a given paragraph
 865 Paragraph::size_type
 866 LyXText::nextBreakPoint(BufferView * bview, Row const * row, int width) const
 867 {
 868         Paragraph * par = row->par();
 869
 870         if (width < 0)
 871                 return par->size();
 872
 873         Paragraph::size_type const pos = row->pos();
 874
 875
 876         // position of the last possible breakpoint
 877         // -1 isn't a suitable value, but a flag
 878         Paragraph::size_type last_separator = -1;
 879         width -= rightMargin(bview->buffer(), row);
 880
 881         Paragraph::size_type const main_body =
 882                 beginningOfMainBody(bview->buffer(), par);
 883         LyXLayout const & layout =
 884                 textclasslist.Style(bview->buffer()->params.textclass, par->getLayout());
 885         Paragraph::size_type i = pos;
 886
 887         if (layout.margintype == MARGIN_RIGHT_ADDRESS_BOX) {
 888                 /* special code for right address boxes, only newlines count */
 889                 while (i < par->size()) {
 890                         if (par->isNewline(i)) {
 891                                 last_separator = i;
 892                                 i = par->size() - 1; // this means break
 893                                 //x = width;
 894                         } else if (par->getChar(i) == Paragraph::META_INSET &&
 895                                    par->getInset(i) && par->getInset(i)->display()){
 896                                 par->getInset(i)->display(false);
 897                         }
 898                         ++i;
 899                 }
 900         } else {
 901                 // Last position is an invariant
 902                 Paragraph::size_type const last =
 903                         par->size();
 904                 // this is the usual handling
 905                 int x = leftMargin(bview, row);
 906                 bool doitonetime = true;
 907                 while (doitonetime || ((x < width) && (i < last))) {
 908                         doitonetime = false;
 909                         char const c = par->getChar(i);
 910                         if (IsNewlineChar(c)) {
 911                                 last_separator = i;
 912                                 x = width; // this means break
 913                         } else if (c == Paragraph::META_INSET &&
 914                                    par->getInset(i)) {
 915
 916                                 // check wether a Display() inset is
 917                                 // valid here. if not, change it to
 918                                 // non-display
 919                                 if (par->getInset(i)->display() &&
 920                                     (layout.isCommand() ||
 921                                      (layout.labeltype == LABEL_MANUAL
 922                                       && i < beginningOfMainBody(bview->buffer(), par)))) {
 923                                         // display istn't allowd
 924                                         par->getInset(i)->display(false);
 925                                         x += singleWidth(bview, par, i, c);
 926                                 } else if (par->getInset(i)->display() ||
 927                                          par->getInset(i)->needFullRow()) {
 928                                         // So break the line here
 929                                         if (i == pos) {
 930                                                 if (pos < last-1) {
 931                                                         last_separator = i;
 932                                                         if (IsLineSeparatorChar(par->getChar(i+1)))
 933                                                                 ++last_separator;
 934                                                 } else
 935                                                         last_separator = last; // to avoid extra rows
 936                                         } else
 937                                                 last_separator = i - 1;
 938                                         x = width;  // this means break
 939                                 } else {
 940                                         x += singleWidth(bview, par, i, c);
 941                                 }
 942                         } else  {
 943                                 if (IsLineSeparatorChar(c))
 944                                         last_separator = i;
 945                                 x += singleWidth(bview, par, i, c);
 946                         }
 947                         ++i;
 948                         if (i == main_body) {
 949                                 x += lyxfont::width(layout.labelsep,
 950                                                     getLabelFont(bview->buffer(), par));
 951                                 if (par->isLineSeparator(i - 1))
 952                                         x-= singleWidth(bview, par, i - 1);
 953                                 int left_margin = labelEnd(bview, row);
 954                                 if (x < left_margin)
 955                                         x = left_margin;
 956                         }
 957                 }
 958                 // end of paragraph is always a suitable separator
 959                 if (i == last && x < width)
 960                         last_separator = i;
 961         }
 962
 963         // well, if last_separator is still 0, the line isn't breakable.
 964         // don't care and cut simply at the end
 965         if (last_separator < 0) {
 966                 last_separator = i;
 967         }
 968
 969         // manual labels cannot be broken in LaTeX, do not care
 970         if (main_body && last_separator < main_body)
 971                 last_separator = main_body - 1;
 972
 973         return last_separator;
 974 }
 975
 976
 977 // returns the minimum space a row needs on the screen in pixel
 978 int LyXText::fill(BufferView * bview, Row * row, int paper_width) const
 979 {
 980         if (paper_width < 0)
 981                 return 0;
 982
 983         int w;
 984         // get the pure distance
 985         Paragraph::size_type const last = rowLastPrintable(row);
 986
 987         // special handling of the right address boxes
 988         if (textclasslist.Style(bview->buffer()->params.textclass,
 989                                 row->par()->getLayout()).margintype
 990             == MARGIN_RIGHT_ADDRESS_BOX) {
 991                 int const tmpfill = row->fill();
 992                 row->fill(0); // the minfill in MarginLeft()
 993                 w = leftMargin(bview, row);
 994                 row->fill(tmpfill);
 995         } else
 996                 w = leftMargin(bview, row);
 997
 998         LyXLayout const & layout = textclasslist.Style(bview->buffer()->params.textclass,
 999                                                        row->par()->getLayout());
1000         Paragraph::size_type const main_body =
1001                 beginningOfMainBody(bview->buffer(), row->par());
1002         Paragraph::size_type i = row->pos();
1003
1004         while (i <= last) {
1005                 if (main_body > 0 && i == main_body) {
1006                         w += lyxfont::width(layout.labelsep, getLabelFont(bview->buffer(), row->par()));
1007                         if (row->par()->isLineSeparator(i - 1))
1008                                 w -= singleWidth(bview, row->par(), i - 1);
1009                         int left_margin = labelEnd(bview, row);
1010                         if (w < left_margin)
1011                                 w = left_margin;
1012                 }
1013                 w += singleWidth(bview, row->par(), i);
1014                 ++i;
1015         }
1016         if (main_body > 0 && main_body > last) {
1017                 w += lyxfont::width(layout.labelsep, getLabelFont(bview->buffer(), row->par()));
1018                 if (last >= 0 && row->par()->isLineSeparator(last))
1019                         w -= singleWidth(bview, row->par(), last);
1020                 int const left_margin = labelEnd(bview, row);
1021                 if (w < left_margin)
1022                         w = left_margin;
1023         }
1024
1025         int const fill = paper_width - w - rightMargin(bview->buffer(), row);
1026 #ifdef WITH_WARNINGS
1027 #warning Please fix me (Jug!)
1028 #endif
1029 #if 0
1030         if (fill < 0)
1031                 return 0;
1032 #endif
1033         return fill;
1034 }
1035
1036
1037 // returns the minimum space a manual label needs on the screen in pixel
1038 int LyXText::labelFill(BufferView * bview, Row const * row) const
1039 {
1040         Paragraph::size_type last = beginningOfMainBody(bview->buffer(), row->par()) - 1;
1041         // -1 because a label ends either with a space that is in the label,
1042         // or with the beginning of a footnote that is outside the label.
1043
1044         // I don't understand this code in depth, but sometimes "last" is
1045         // less than 0 and this causes a crash. This fix seems to work
1046         // correctly, but I bet the real error is elsewhere.  The bug is
1047         // triggered when you have an open footnote in a paragraph
1048         // environment with a manual label. (Asger)
1049         if (last < 0) last = 0;
1050
1051         if (row->par()->isLineSeparator(last)) /* a sepearator at this end
1052                                                 does not count */
1053                 --last;
1054
1055         int w = 0;
1056         int i = row->pos();
1057         while (i <= last) {
1058                 w += singleWidth(bview, row->par(), i);
1059                 ++i;
1060         }
1061
1062         int fill = 0;
1063         if (!row->par()->params().labelWidthString().empty()) {
1064                 fill = max(lyxfont::width(row->par()->params().labelWidthString(),
1065                                           getLabelFont(bview->buffer(), row->par())) - w,
1066                            0);
1067         }
1068
1069         return fill;
1070 }
1071
1072
1073 // returns the number of separators in the specified row. The separator
1074 // on the very last column doesnt count
1075 int LyXText::numberOfSeparators(Buffer const * buf, Row const * row) const
1076 {
1077         Paragraph::size_type const last = rowLast(row);
1078         Paragraph::size_type p =
1079                 max(row->pos(), beginningOfMainBody(buf, row->par()));
1080         int n = 0;
1081         for (; p < last; ++p) {
1082                 if (row->par()->isSeparator(p)) {
1083                         ++n;
1084                 }
1085         }
1086         return n;
1087 }
1088
1089
1090 // returns the number of hfills in the specified row. The LyX-Hfill is
1091 // a LaTeX \hfill so that the hfills at the beginning and at the end were
1092 // ignored. This is *MUCH* more usefull than not to ignore!
1093 int LyXText::numberOfHfills(Buffer const * buf, Row const * row) const
1094 {
1095         Paragraph::size_type const last = rowLast(row);
1096         Paragraph::size_type first = row->pos();
1097         if (first) { /* hfill *DO* count at the beginning
1098                       * of paragraphs! */
1099                 while(first <= last && row->par()->isHfill(first))
1100                         ++first;
1101         }
1102
1103         first = max(first, beginningOfMainBody(buf, row->par()));
1104         int n = 0;
1105         for (int p = first; p <= last; ++p) { // last, because the end is ignored!
1106                 if (row->par()->isHfill(p)) {
1107                         ++n;
1108                 }
1109         }
1110         return n;
1111 }
1112
1113
1114 // like NumberOfHfills, but only those in the manual label!
1115 int LyXText::numberOfLabelHfills(Buffer const * buf, Row const * row) const
1116 {
1117         Paragraph::size_type last = rowLast(row);
1118         Paragraph::size_type first = row->pos();
1119         if (first) { /* hfill *DO* count at the beginning
1120                       * of paragraphs! */
1121                 while(first < last && row->par()->isHfill(first))
1122                         ++first;
1123         }
1124
1125         last = min(last, beginningOfMainBody(buf, row->par()));
1126         int n = 0;
1127         for (Paragraph::size_type p = first;
1128              p < last; ++p) {  // last, because the end is ignored!
1129                 if (row->par()->isHfill(p)) {
1130                         ++n;
1131                 }
1132         }
1133         return n;
1134 }
1135
1136
1137 // returns true, if a expansion is needed.
1138 // Rules are given by LaTeX
1139 bool LyXText::hfillExpansion(Buffer const * buf, Row const * row_ptr,
1140                              Paragraph::size_type pos) const
1141 {
1142         // by the way, is it a hfill?
1143         if (!row_ptr->par()->isHfill(pos))
1144                 return false;
1145
1146         // at the end of a row it does not count
1147         if (pos >= rowLast(row_ptr))
1148                 return false;
1149
1150         // at the beginning of a row it does not count, if it is not
1151         // the first row of a paragaph
1152         if (!row_ptr->pos())
1153                 return true;
1154
1155         // in some labels  it does not count
1156         if (textclasslist.Style(buf->params.textclass,
1157                                 row_ptr->par()->getLayout()).margintype
1158             != MARGIN_MANUAL
1159             && pos < beginningOfMainBody(buf, row_ptr->par()))
1160                 return false;
1161
1162         // if there is anything between the first char of the row and
1163         // the sepcified position that is not a newline and not a hfill,
1164         // the hfill will count, otherwise not
1165         Paragraph::size_type i = row_ptr->pos();
1166         while (i < pos && (row_ptr->par()->isNewline(i)
1167                            || row_ptr->par()->isHfill(i)))
1168                 ++i;
1169
1170         return i != pos;
1171 }
1172
1173
1174 LColor::color LyXText::backgroundColor()
1175 {
1176         if (inset_owner)
1177                 return inset_owner->backgroundColor();
1178         else
1179                 return LColor::background;
1180 }
1181
1182 void LyXText::setHeightOfRow(BufferView * bview, Row * row_ptr) const
1183 {
1184     /* get the maximum ascent and the maximum descent */
1185         int asc = 0;
1186         int desc = 0;
1187         float layoutasc = 0;
1188         float layoutdesc = 0;
1189         float tmptop = 0;
1190         LyXFont tmpfont;
1191         Inset * tmpinset = 0;
1192
1193         /* this must not happen before the currentrow for clear reasons.
1194            so the trick is just to set the current row onto this row */
1195         int unused_y;
1196         getRow(row_ptr->par(), row_ptr->pos(), unused_y);
1197
1198         /* ok , let us initialize the maxasc and maxdesc value.
1199          * This depends in LaTeX of the font of the last character
1200          * in the paragraph. The hack below is necessary because
1201          * of the possibility of open footnotes */
1202
1203         /* Correction: only the fontsize count. The other properties
1204            are taken from the layoutfont. Nicer on the screen :) */
1205         Paragraph * par = row_ptr->par();
1206         Paragraph * firstpar = row_ptr->par();
1207
1208         LyXLayout const & layout = textclasslist.Style(bview->buffer()->params.textclass,
1209                                                        firstpar->getLayout());
1210
1211         // as max get the first character of this row then it can increes but not
1212         // decrees the height. Just some point to start with so we don't have to
1213         // do the assignment below too often.
1214         LyXFont font = getFont(bview->buffer(), par, row_ptr->pos());
1215         LyXFont::FONT_SIZE const tmpsize = font.size();
1216         font = getLayoutFont(bview->buffer(), par);
1217         LyXFont::FONT_SIZE const size = font.size();
1218         font.setSize(tmpsize);
1219
1220         LyXFont labelfont = getLabelFont(bview->buffer(), par);
1221
1222         float spacing_val = 1.0;
1223         if (!row_ptr->par()->params().spacing().isDefault()) {
1224                 spacing_val = row_ptr->par()->params().spacing().getValue();
1225         } else {
1226                 spacing_val = bview->buffer()->params.spacing.getValue();
1227         }
1228         //lyxerr << "spacing_val = " << spacing_val << endl;
1229
1230         int maxasc = int(lyxfont::maxAscent(font) *
1231                          layout.spacing.getValue() *
1232                          spacing_val);
1233         int maxdesc = int(lyxfont::maxDescent(font) *
1234                           layout.spacing.getValue() *
1235                           spacing_val);
1236         int const pos_end = rowLast(row_ptr);
1237         int labeladdon = 0;
1238         int maxwidth = 0;
1239
1240         // Check if any insets are larger
1241         for (int pos = row_ptr->pos(); pos <= pos_end; ++pos) {
1242                 if (row_ptr->par()->getChar(pos) == Paragraph::META_INSET) {
1243                         tmpfont = getFont(bview->buffer(), row_ptr->par(), pos);
1244                         tmpinset = row_ptr->par()->getInset(pos);
1245                         if (tmpinset) {
1246 #if 1 // this is needed for deep update on initialitation
1247                                 tmpinset->update(bview, tmpfont);
1248 #endif
1249                                 asc = tmpinset->ascent(bview, tmpfont);
1250                                 desc = tmpinset->descent(bview, tmpfont);
1251                                 maxwidth += tmpinset->width(bview, tmpfont);
1252                                 maxasc = max(maxasc, asc);
1253                                 maxdesc = max(maxdesc, desc);
1254                         }
1255                 } else {
1256                         maxwidth += singleWidth(bview, row_ptr->par(), pos);
1257                 }
1258         }
1259
1260         // Check if any custom fonts are larger (Asger)
1261         // This is not completely correct, but we can live with the small,
1262         // cosmetic error for now.
1263         LyXFont::FONT_SIZE maxsize =
1264                 row_ptr->par()->highestFontInRange(row_ptr->pos(), pos_end, size);
1265         if (maxsize > font.size()) {
1266                 font.setSize(maxsize);
1267
1268                 asc = lyxfont::maxAscent(font);
1269                 desc = lyxfont::maxDescent(font);
1270                 if (asc > maxasc)
1271                         maxasc = asc;
1272                 if (desc > maxdesc)
1273                         maxdesc = desc;
1274         }
1275
1276         // This is nicer with box insets:
1277         ++maxasc;
1278         ++maxdesc;
1279
1280         row_ptr->ascent_of_text(maxasc);
1281
1282         // is it a top line?
1283         if (!row_ptr->pos() && (row_ptr->par() == firstpar)) {
1284
1285                 // some parksips VERY EASY IMPLEMENTATION
1286                 if (bview->buffer()->params.paragraph_separation ==
1287                         BufferParams::PARSEP_SKIP)
1288                 {
1289                         if (layout.isParagraph()
1290                                 && firstpar->getDepth() == 0
1291                                 && firstpar->previous())
1292                         {
1293                                 maxasc += bview->buffer()->params.getDefSkip().inPixels(bview);
1294                         } else if (firstpar->previous() &&
1295                                    textclasslist.Style(bview->buffer()->params.textclass,
1296                                                        firstpar->previous()->
1297                                                        getLayout()).isParagraph() &&
1298                                    firstpar->previous()->getDepth() == 0)
1299                         {
1300                                 // is it right to use defskip here too? (AS)
1301                                 maxasc += bview->buffer()->params.getDefSkip().inPixels(bview);
1302                         }
1303                 }
1304
1305                 // the paper margins
1306                 if (!row_ptr->par()->previous() && bv_owner)
1307                         maxasc += LYX_PAPER_MARGIN;
1308
1309                 // add the vertical spaces, that the user added
1310                 if (firstpar->params().spaceTop().kind() != VSpace::NONE)
1311                         maxasc += int(firstpar->params().spaceTop().inPixels(bview));
1312
1313                 // do not forget the DTP-lines!
1314                 // there height depends on the font of the nearest character
1315                 if (firstpar->params().lineTop())
1316                         maxasc += 2 * lyxfont::ascent('x', getFont(bview->buffer(),
1317                                                                    firstpar, 0));
1318
1319                 // and now the pagebreaks
1320                 if (firstpar->params().pagebreakTop())
1321                         maxasc += 3 * defaultHeight();
1322
1323                 // This is special code for the chapter, since the label of this
1324                 // layout is printed in an extra row
1325                 if (layout.labeltype == LABEL_COUNTER_CHAPTER
1326                         && bview->buffer()->params.secnumdepth >= 0)
1327                 {
1328                         float spacing_val = 1.0;
1329                         if (!row_ptr->par()->params().spacing().isDefault()) {
1330                                 spacing_val = row_ptr->par()->params().spacing().getValue();
1331                         } else {
1332                                 spacing_val = bview->buffer()->params.spacing.getValue();
1333                         }
1334
1335                         labeladdon = int(lyxfont::maxDescent(labelfont) *
1336                                          layout.spacing.getValue() *
1337                                          spacing_val)
1338                                 + int(lyxfont::maxAscent(labelfont) *
1339                                       layout.spacing.getValue() *
1340                                       spacing_val);
1341                 }
1342
1343                 // special code for the top label
1344                 if ((layout.labeltype == LABEL_TOP_ENVIRONMENT
1345                      || layout.labeltype == LABEL_BIBLIO
1346                      || layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
1347                     && row_ptr->par()->isFirstInSequence()
1348                     && !row_ptr->par()->getLabelstring().empty())
1349                 {
1350                         float spacing_val = 1.0;
1351                         if (!row_ptr->par()->params().spacing().isDefault()) {
1352                                 spacing_val = row_ptr->par()->params().spacing().getValue();
1353                         } else {
1354                                 spacing_val = bview->buffer()->params.spacing.getValue();
1355                         }
1356
1357                         labeladdon = int(
1358                                 (lyxfont::maxAscent(labelfont) *
1359                                  layout.spacing.getValue() *
1360                                  spacing_val)
1361                                 +(lyxfont::maxDescent(labelfont) *
1362                                   layout.spacing.getValue() *
1363                                   spacing_val)
1364                                 + layout.topsep * defaultHeight()
1365                                 + layout.labelbottomsep *  defaultHeight());
1366                 }
1367
1368                 // and now the layout spaces, for example before and after a section,
1369                 // or between the items of a itemize or enumerate environment
1370
1371                 if (!firstpar->params().pagebreakTop()) {
1372                         Paragraph * prev = row_ptr->par()->previous();
1373                         if (prev)
1374                                 prev = row_ptr->par()->depthHook(row_ptr->par()->getDepth());
1375                         if (prev && prev->getLayout() == firstpar->getLayout() &&
1376                                 prev->getDepth() == firstpar->getDepth() &&
1377                                 prev->getLabelWidthString() == firstpar->getLabelWidthString())
1378                         {
1379                                 layoutasc = (layout.itemsep * defaultHeight());
1380                         } else if (row_ptr->previous()) {
1381                                 tmptop = layout.topsep;
1382
1383                                 if (row_ptr->previous()->par()->getDepth() >= row_ptr->par()->getDepth())
1384                                         tmptop -= textclasslist.Style(bview->buffer()->params.textclass,
1385                                                                       row_ptr->previous()->par()->
1386                                                                       getLayout()).bottomsep;
1387
1388                                 if (tmptop > 0)
1389                                         layoutasc = (tmptop * defaultHeight());
1390                         } else if (row_ptr->par()->params().lineTop()) {
1391                                 tmptop = layout.topsep;
1392
1393                                 if (tmptop > 0)
1394                                         layoutasc = (tmptop * defaultHeight());
1395                         }
1396
1397                         prev = row_ptr->par()->outerHook();
1398                         if (prev)  {
1399                                 maxasc += int(textclasslist.Style(bview->buffer()->params.textclass,
1400                                               prev->getLayout()).parsep * defaultHeight());
1401                         } else {
1402                                 if (firstpar->previous() &&
1403                                         firstpar->previous()->getDepth() == 0 &&
1404                                         firstpar->previous()->getLayout() !=
1405                                         firstpar->getLayout())
1406                                 {
1407                                         // avoid parsep
1408                                 } else if (firstpar->previous()) {
1409                                         maxasc += int(layout.parsep * defaultHeight());
1410                                 }
1411                         }
1412                 }
1413         }
1414
1415         // is it a bottom line?
1416         if (row_ptr->par() == par
1417                 && (!row_ptr->next() || row_ptr->next()->par() != row_ptr->par()))
1418         {
1419                 // the paper margins
1420                 if (!par->next() && bv_owner)
1421                         maxdesc += LYX_PAPER_MARGIN;
1422
1423                 // add the vertical spaces, that the user added
1424                 if (firstpar->params().spaceBottom().kind() != VSpace::NONE)
1425                         maxdesc += int(firstpar->params().spaceBottom().inPixels(bview));
1426
1427                 // do not forget the DTP-lines!
1428                 // there height depends on the font of the nearest character
1429                 if (firstpar->params().lineBottom())
1430                         maxdesc += 2 * lyxfont::ascent('x',
1431                                                        getFont(bview->buffer(),
1432                                                                par,
1433                                                                max(Paragraph::size_type(0), par->size() - 1)));
1434
1435                 // and now the pagebreaks
1436                 if (firstpar->params().pagebreakBottom())
1437                         maxdesc += 3 * defaultHeight();
1438
1439                 // and now the layout spaces, for example before and after
1440                 // a section, or between the items of a itemize or enumerate
1441                 // environment
1442                 if (!firstpar->params().pagebreakBottom() && row_ptr->par()->next()) {
1443                         Paragraph * nextpar = row_ptr->par()->next();
1444                         Paragraph * comparepar = row_ptr->par();
1445                         float usual = 0;
1446                         float unusual = 0;
1447
1448                         if (comparepar->getDepth() > nextpar->getDepth()) {
1449                                 usual = (textclasslist.Style(bview->buffer()->params.textclass,
1450                                          comparepar->getLayout()).bottomsep * defaultHeight());
1451                                 comparepar = comparepar->depthHook(nextpar->getDepth());
1452                                 if (comparepar->getLayout()!= nextpar->getLayout()
1453                                         || nextpar->getLabelWidthString() !=
1454                                         comparepar->getLabelWidthString())
1455                                 {
1456                                         unusual = (textclasslist.Style(bview->buffer()->params.textclass,
1457                                                    comparepar->getLayout()).bottomsep * defaultHeight());
1458                                 }
1459                                 if (unusual > usual)
1460                                         layoutdesc = unusual;
1461                                 else
1462                                         layoutdesc = usual;
1463                         } else if (comparepar->getDepth() ==  nextpar->getDepth()) {
1464
1465                                 if (comparepar->getLayout()!= nextpar->getLayout()
1466                                         || nextpar->getLabelWidthString() !=
1467                                         comparepar->getLabelWidthString())
1468                                         layoutdesc = int(textclasslist.Style(bview->buffer()->params.textclass,
1469                                                                                                                  comparepar->getLayout()).bottomsep * defaultHeight());
1470                         }
1471                 }
1472         }
1473
1474         // incalculate the layout spaces
1475         maxasc += int(layoutasc * 2 / (2 + firstpar->getDepth()));
1476         maxdesc += int(layoutdesc * 2 / (2 + firstpar->getDepth()));
1477
1478         // calculate the new height of the text
1479         height -= row_ptr->height();
1480
1481         row_ptr->height(maxasc + maxdesc + labeladdon);
1482         row_ptr->baseline(maxasc + labeladdon);
1483
1484         height += row_ptr->height();
1485         float x;
1486         float dummy;
1487         prepareToPrint(bview, row_ptr, x, dummy, dummy, dummy, false);
1488         row_ptr->width(int(maxwidth + x));
1489         if (inset_owner) {
1490                 Row * r = firstrow;
1491                 width = max(0,workWidth(bview));
1492                 while(r) {
1493                         if (r->width() > width)
1494                                 width = r->width();
1495                         r = r->next();
1496                 }
1497         }
1498 }
1499
1500
1501 /* Appends the implicit specified paragraph behind the specified row,
1502  * start at the implicit given position */
1503 void LyXText::appendParagraph(BufferView * bview, Row * row) const
1504 {
1505    bool not_ready = true;
1506
1507    // The last character position of a paragraph is an invariant so we can
1508    // safely get it here. (Asger)
1509    int const lastposition = row->par()->size();
1510    do {
1511       // Get the next breakpoint
1512       int z = nextBreakPoint(bview, row, workWidth(bview));
1513
1514       Row * tmprow = row;
1515
1516       // Insert the new row
1517       if (z < lastposition) {
1518          ++z;
1519          insertRow(row, row->par(), z);
1520          row = row->next();
1521
1522          row->height(0);
1523       } else
1524          not_ready = false;
1525
1526       // Set the dimensions of the row
1527 #ifdef WITH_WARNINGS
1528 #warning Something is rotten here! (Jug)
1529 #endif
1530       tmprow->fill(fill(bview, tmprow, workWidth(bview)));
1531       setHeightOfRow(bview, tmprow);
1532
1533    } while (not_ready);
1534 }
1535
1536
1537 void LyXText::breakAgain(BufferView * bview, Row * row) const
1538 {
1539         bool not_ready = true;
1540
1541         do  {
1542                 // get the next breakpoint
1543                 Paragraph::size_type z = nextBreakPoint(bview, row, workWidth(bview));
1544                 Row * tmprow = row;
1545
1546                 if (z < row->par()->size()) {
1547                         if (!row->next() || (row->next() && row->next()->par() != row->par())) {
1548                                 // insert a new row
1549                                 ++z;
1550                                 insertRow(row, row->par(), z);
1551                                 row = row->next();
1552                                 row->height(0);
1553                         } else  {
1554                                 row = row->next();
1555                                 ++z;
1556                                 if (row->pos() == z)
1557                                         not_ready = false;     // the rest will not change
1558                                 else {
1559                                         row->pos(z);
1560                                 }
1561                         }
1562                 } else {
1563                         /* if there are some rows too much, delete them */
1564                         /* only if you broke the whole paragraph! */
1565                         Row * tmprow2 = row;
1566                         while (tmprow2->next() && tmprow2->next()->par() == row->par()) {
1567                                 tmprow2 = tmprow2->next();
1568                         }
1569                         while (tmprow2 != row) {
1570                                 tmprow2 = tmprow2->previous();
1571                                 removeRow(tmprow2->next());
1572                         }
1573                         not_ready = false;
1574                 }
1575
1576                 /* set the dimensions of the row */
1577                 tmprow->fill(fill(bview, tmprow, workWidth(bview)));
1578                 setHeightOfRow(bview, tmprow);
1579         } while (not_ready);
1580 }
1581
1582
1583 // this is just a little changed version of break again
1584 void LyXText::breakAgainOneRow(BufferView * bview, Row * row)
1585 {
1586         // get the next breakpoint
1587         Paragraph::size_type z = nextBreakPoint(bview, row, workWidth(bview));
1588         Row * tmprow = row;
1589
1590         if (z < row->par()->size()) {
1591                 if (!row->next()
1592                     || (row->next() && row->next()->par() != row->par())) {
1593                         /* insert a new row */
1594                         ++z;
1595                         insertRow(row, row->par(), z);
1596                         row = row->next();
1597                         row->height(0);
1598                 } else  {
1599                         row= row->next();
1600                         ++z;
1601                         if (row->pos() != z)
1602                                 row->pos(z);
1603                 }
1604         } else {
1605                 // if there are some rows too much, delete them
1606                 // only if you broke the whole paragraph!
1607                 Row * tmprow2 = row;
1608                 while (tmprow2->next()
1609                        && tmprow2->next()->par() == row->par()) {
1610                         tmprow2 = tmprow2->next();
1611                 }
1612                 while (tmprow2 != row) {
1613                         tmprow2 = tmprow2->previous();
1614                         removeRow(tmprow2->next());
1615                 }
1616         }
1617
1618         // set the dimensions of the row
1619         tmprow->fill(fill(bview, tmprow, workWidth(bview)));
1620         setHeightOfRow(bview, tmprow);
1621 }
1622
1623
1624 void LyXText::breakParagraph(BufferView * bview, char keep_layout)
1625 {
1626    LyXLayout const & layout =
1627            textclasslist.Style(bview->buffer()->params.textclass,
1628                                cursor.par()->getLayout());
1629
1630    // this is only allowed, if the current paragraph is not empty or caption
1631    if ((cursor.par()->size() <= 0)
1632        && layout.labeltype!= LABEL_SENSITIVE)
1633            return;
1634
1635    setUndo(bview, Undo::INSERT,cursor.par(),cursor.par()->next());
1636
1637    // Always break behind a space
1638    //
1639    // It is better to erase the space (Dekel)
1640    if (cursor.pos() < cursor.par()->size()
1641        && cursor.par()->isLineSeparator(cursor.pos()))
1642            cursor.par()->erase(cursor.pos());
1643            // cursor.pos(cursor.pos() + 1);
1644
1645    // break the paragraph
1646    if (keep_layout)
1647      keep_layout = 2;
1648    else
1649      keep_layout = layout.isEnvironment();
1650    cursor.par()->breakParagraph(bview->buffer()->params, cursor.pos(),
1651                                 keep_layout);
1652
1653    // well this is the caption hack since one caption is really enough
1654    if (layout.labeltype == LABEL_SENSITIVE) {
1655      if (!cursor.pos())
1656              // set to standard-layout
1657              cursor.par()->setLayout(0);
1658      else
1659              // set to standard-layout
1660              cursor.par()->next()->setLayout(0);
1661    }
1662
1663    /* if the cursor is at the beginning of a row without prior newline,
1664     * move one row up!
1665     * This touches only the screen-update. Otherwise we would may have
1666     * an empty row on the screen */
1667    if (cursor.pos() && !cursor.row()->par()->isNewline(cursor.row()->pos() - 1)
1668        && cursor.row()->pos() == cursor.pos()) {
1669            cursorLeft(bview);
1670    }
1671
1672    status(bview, LyXText::NEED_MORE_REFRESH);
1673    refresh_row = cursor.row();
1674    refresh_y = cursor.y() - cursor.row()->baseline();
1675
1676    // Do not forget the special right address boxes
1677    if (layout.margintype == MARGIN_RIGHT_ADDRESS_BOX) {
1678       while (refresh_row->previous() &&
1679              refresh_row->previous()->par() == refresh_row->par()) {
1680               refresh_row = refresh_row->previous();
1681               refresh_y -= refresh_row->height();
1682       }
1683    }
1684    removeParagraph(cursor.row());
1685
1686    // set the dimensions of the cursor row
1687    cursor.row()->fill(fill(bview, cursor.row(), workWidth(bview)));
1688
1689    setHeightOfRow(bview, cursor.row());
1690
1691    while (cursor.par()->next()->size()
1692           && cursor.par()->next()->isNewline(0))
1693            cursor.par()->next()->erase(0);
1694
1695    insertParagraph(bview, cursor.par()->next(), cursor.row());
1696
1697    updateCounters(bview, cursor.row()->previous());
1698
1699    /* This check is necessary. Otherwise the new empty paragraph will
1700     * be deleted automatically. And it is more friendly for the user! */
1701    if (cursor.pos())
1702            setCursor(bview, cursor.par()->next(), 0);
1703    else
1704            setCursor(bview, cursor.par(), 0);
1705
1706    if (cursor.row()->next())
1707            breakAgain(bview, cursor.row()->next());
1708
1709    need_break_row = 0;
1710 }
1711
1712
1713 // Just a macro to make some thing easier.
1714 void LyXText::redoParagraph(BufferView * bview) const
1715 {
1716         clearSelection();
1717         redoParagraphs(bview, cursor, cursor.par()->next());
1718         setCursorIntern(bview, cursor.par(), cursor.pos());
1719 }
1720
1721
1722 /* insert a character, moves all the following breaks in the
1723  * same Paragraph one to the right and make a rebreak */
1724 void LyXText::insertChar(BufferView * bview, char c)
1725 {
1726         setUndo(bview, Undo::INSERT,
1727                 cursor.par(), cursor.par()->next());
1728
1729         // When the free-spacing option is set for the current layout,
1730         // disable the double-space checking
1731
1732         bool const freeSpacing =
1733                 textclasslist.Style(bview->buffer()->params.textclass,
1734                                cursor.row()->par()->getLayout()).free_spacing;
1735
1736
1737         if (lyxrc.auto_number) {
1738                 static string const number_operators = "+-/*";
1739                 static string const number_unary_operators = "+-";
1740                 static string const number_seperators = ".,:";
1741
1742                 if (current_font.number() == LyXFont::ON) {
1743                         if (!isdigit(c) && !contains(number_operators, c) &&
1744                             !(contains(number_seperators, c) &&
1745                               cursor.pos() >= 1 &&
1746                               cursor.pos() < cursor.par()->size() &&
1747                               getFont(bview->buffer(),
1748                                       cursor.par(),
1749                                       cursor.pos()).number() == LyXFont::ON &&
1750                               getFont(bview->buffer(),
1751                                       cursor.par(),
1752                                       cursor.pos() - 1).number() == LyXFont::ON)
1753                             )
1754                                 number(bview); // Set current_font.number to OFF
1755                 } else if (isdigit(c) &&
1756                            real_current_font.isVisibleRightToLeft()) {
1757                         number(bview); // Set current_font.number to ON
1758
1759                         if (cursor.pos() > 0) {
1760                                 char const c = cursor.par()->getChar(cursor.pos() - 1);
1761                                 if (contains(number_unary_operators, c) &&
1762                                     (cursor.pos() == 1 ||
1763                                      cursor.par()->isSeparator(cursor.pos() - 2) ||
1764                                      cursor.par()->isNewline(cursor.pos() - 2) )
1765                                    ) {
1766                                         setCharFont(bview->buffer(),
1767                                                     cursor.par(),
1768                                                     cursor.pos() - 1,
1769                                                     current_font);
1770                                 } else if (contains(number_seperators, c) &&
1771                                            cursor.pos() >= 2 &&
1772                                            getFont(bview->buffer(),
1773                                                    cursor.par(),
1774                                                    cursor.pos() - 2).number() == LyXFont::ON) {
1775                                         setCharFont(bview->buffer(),
1776                                                     cursor.par(),
1777                                                     cursor.pos() - 1,
1778                                                     current_font);
1779                                 }
1780                         }
1781                 }
1782         }
1783
1784
1785         /* First check, if there will be two blanks together or a blank at
1786           the beginning of a paragraph.
1787           I decided to handle blanks like normal characters, the main
1788           difference are the special checks when calculating the row.fill
1789           (blank does not count at the end of a row) and the check here */
1790
1791         // The bug is triggered when we type in a description environment:
1792         // The current_font is not changed when we go from label to main text
1793         // and it should (along with realtmpfont) when we type the space.
1794         // CHECK There is a bug here! (Asger)
1795
1796         LyXFont realtmpfont = real_current_font;
1797         LyXFont rawtmpfont = current_font;  /* store the current font.
1798                                      * This is because of the use
1799                                      * of cursor movements. The moving
1800                                      * cursor would refresh the
1801                                      * current font */
1802
1803         // Get the font that is used to calculate the baselineskip
1804         Paragraph::size_type const lastpos = cursor.par()->size();
1805         LyXFont rawparfont =
1806                 cursor.par()->getFontSettings(bview->buffer()->params,
1807                                               lastpos - 1);
1808
1809         bool jumped_over_space = false;
1810
1811         if (!freeSpacing && IsLineSeparatorChar(c)) {
1812                 if ((cursor.pos() > 0
1813                      && cursor.par()->isLineSeparator(cursor.pos() - 1))
1814                     || (cursor.pos() > 0
1815                         && cursor.par()->isNewline(cursor.pos() - 1))
1816                     || (cursor.pos() == 0)) {
1817                         static bool sent_space_message = false;
1818                         if (!sent_space_message) {
1819                                 if (cursor.pos() == 0)
1820                                         bview->owner()->message(_("You cannot insert a space at the beginning of a paragraph.  Please read the Tutorial."));
1821                                 else
1822                                         bview->owner()->message(_("You cannot type two spaces this way.  Please read the Tutorial."));
1823                                 sent_space_message = true;
1824                         }
1825                         charInserted();
1826                         return;
1827                 }
1828         } else if (IsNewlineChar(c)) {
1829                 if (cursor.par() == cursor.par()
1830                     && cursor.pos() <= beginningOfMainBody(bview->buffer(), cursor.par())) {
1831                         charInserted();
1832                         return;
1833                 }
1834                 /* No newline at first position
1835                  * of a paragraph or behind labels.
1836                  * TeX does not allow that. */
1837
1838                 if (cursor.pos() < cursor.par()->size() &&
1839                     cursor.par()->isLineSeparator(cursor.pos()))
1840                         // newline always after a blank!
1841                         cursorRight(bview);
1842                 cursor.row()->fill(-1);        // to force a new break
1843         }
1844
1845         // the display inset stuff
1846         if (cursor.row()->par()->getChar(cursor.row()->pos()) == Paragraph::META_INSET
1847             && cursor.row()->par()->getInset(cursor.row()->pos())
1848             && (cursor.row()->par()->getInset(cursor.row()->pos())->display() ||
1849                 cursor.row()->par()->getInset(cursor.row()->pos())->needFullRow()))
1850                 cursor.row()->fill(-1); // to force a new break
1851
1852         // get the cursor row fist
1853         Row * row = cursor.row();
1854         int y = cursor.y() - row->baseline();
1855         if (c != Paragraph::META_INSET) /* Here case LyXText::InsertInset
1856                                             * already insertet the character */
1857                 cursor.par()->insertChar(cursor.pos(), c);
1858         setCharFont(bview->buffer(), cursor.par(), cursor.pos(), rawtmpfont);
1859
1860         if (!jumped_over_space) {
1861                 // refresh the positions
1862                 Row * tmprow = row;
1863                 while (tmprow->next() && tmprow->next()->par() == row->par()) {
1864                         tmprow = tmprow->next();
1865                         tmprow->pos(tmprow->pos() + 1);
1866                 }
1867         }
1868
1869         // Is there a break one row above
1870         if ((cursor.par()->isLineSeparator(cursor.pos())
1871              || cursor.par()->isNewline(cursor.pos())
1872              || cursor.row()->fill() == -1)
1873             && row->previous() && row->previous()->par() == row->par()) {
1874                 Paragraph::size_type z = nextBreakPoint(bview,
1875                                                            row->previous(),
1876                                                            workWidth(bview));
1877                 if (z >= row->pos()) {
1878                         row->pos(z + 1);
1879
1880                         // set the dimensions of the row above
1881                         row->previous()->fill(fill(bview,
1882                                                    row->previous(),
1883                                                    workWidth(bview)));
1884
1885                         setHeightOfRow(bview, row->previous());
1886
1887                         y -= row->previous()->height();
1888                         refresh_y = y;
1889                         refresh_row = row->previous();
1890                         status(bview, LyXText::NEED_MORE_REFRESH);
1891
1892                         breakAgainOneRow(bview, row);
1893
1894                         current_font = rawtmpfont;
1895                         real_current_font = realtmpfont;
1896                         setCursor(bview, cursor.par(), cursor.pos() + 1,
1897                                   false, cursor.boundary());
1898                         // cursor MUST be in row now.
1899
1900                         if (row->next() && row->next()->par() == row->par())
1901                                 need_break_row = row->next();
1902                         else
1903                                 need_break_row = 0;
1904
1905                         // check, wether the last characters font has changed.
1906                         if (cursor.pos() && cursor.pos() == cursor.par()->size()
1907                             && rawparfont != rawtmpfont)
1908                                 redoHeightOfParagraph(bview, cursor);
1909
1910                         charInserted();
1911                         return;
1912                 }
1913         }
1914
1915         // recalculate the fill of the row
1916         if (row->fill() >= 0)  /* needed because a newline
1917                               * will set fill to -1. Otherwise
1918                               * we would not get a rebreak! */
1919                 row->fill(fill(bview, row, workWidth(bview)));
1920         if (row->fill() < 0) {
1921                 refresh_y = y;
1922                 refresh_row = row;
1923                 refresh_x = cursor.x();
1924                 refresh_pos = cursor.pos();
1925                 status(bview, LyXText::NEED_MORE_REFRESH);
1926                 breakAgainOneRow(bview, row);
1927                 // will the cursor be in another row now?
1928                 if (rowLast(row) <= cursor.pos() + 1 && row->next()) {
1929                         if (row->next() && row->next()->par() == row->par())
1930                                 // this should always be true
1931                                 row = row->next();
1932                         breakAgainOneRow(bview, row);
1933                 }
1934                 current_font = rawtmpfont;
1935                 real_current_font = realtmpfont;
1936
1937                 setCursor(bview, cursor.par(), cursor.pos() + 1, false,
1938                           cursor.boundary());
1939                 if (isBoundary(bview->buffer(), cursor.par(), cursor.pos())
1940                     != cursor.boundary())
1941                         setCursor(bview, cursor.par(), cursor.pos(), false,
1942                           !cursor.boundary());
1943                 if (row->next() && row->next()->par() == row->par())
1944                         need_break_row = row->next();
1945                 else
1946                         need_break_row = 0;
1947         } else {
1948                 refresh_y = y;
1949                 refresh_x = cursor.x();
1950                 refresh_row = row;
1951                 refresh_pos = cursor.pos();
1952
1953                 int const tmpheight = row->height();
1954                 setHeightOfRow(bview, row);
1955                 if (tmpheight == row->height())
1956                         status(bview, LyXText::NEED_VERY_LITTLE_REFRESH);
1957                 else
1958                         status(bview, LyXText::NEED_MORE_REFRESH);
1959
1960                 current_font = rawtmpfont;
1961                 real_current_font = realtmpfont;
1962                 setCursor(bview, cursor.par(), cursor.pos() + 1, false,
1963                           cursor.boundary());
1964         }
1965
1966         // check, wether the last characters font has changed.
1967         if (cursor.pos() && cursor.pos() == cursor.par()->size()
1968             && rawparfont != rawtmpfont) {
1969                 redoHeightOfParagraph(bview, cursor);
1970         } else {
1971                 // now the special right address boxes
1972                 if (textclasslist.Style(bview->buffer()->params.textclass,
1973                                    cursor.par()->getLayout()).margintype
1974                     == MARGIN_RIGHT_ADDRESS_BOX) {
1975                         redoDrawingOfParagraph(bview, cursor);
1976                 }
1977         }
1978
1979         charInserted();
1980 }
1981
1982
1983 void LyXText::charInserted()
1984 {
1985         // Here we could call FinishUndo for every 20 characters inserted.
1986         // This is from my experience how emacs does it.
1987         static unsigned int counter;
1988         if (counter < 20) {
1989                 ++counter;
1990         } else {
1991                 finishUndo();
1992                 counter = 0;
1993         }
1994 }
1995
1996
1997 void LyXText::prepareToPrint(BufferView * bview,
1998                              Row * row, float & x,
1999                              float & fill_separator,
2000                              float & fill_hfill,
2001                              float & fill_label_hfill,
2002                              bool bidi) const
2003 {
2004         float nlh;
2005         float ns;
2006
2007         float w = row->fill();
2008         fill_hfill = 0;
2009         fill_label_hfill = 0;
2010         fill_separator = 0;
2011         fill_label_hfill = 0;
2012
2013         bool const is_rtl =
2014                 row->par()->isRightToLeftPar(bview->buffer()->params);
2015         if (is_rtl) {
2016                 x = (workWidth(bview) > 0)
2017                         ? rightMargin(bview->buffer(), row) : 0;
2018         } else
2019                 x = (workWidth(bview) > 0) ? leftMargin(bview, row) : 0;
2020
2021         // is there a manual margin with a manual label
2022         if (textclasslist.Style(bview->buffer()->params.textclass,
2023                            row->par()->getLayout()).margintype == MARGIN_MANUAL
2024             && textclasslist.Style(bview->buffer()->params.textclass,
2025                               row->par()->getLayout()).labeltype == LABEL_MANUAL) {
2026
2027                 /* one more since labels are left aligned */
2028                 nlh = numberOfLabelHfills(bview->buffer(), row) + 1;
2029                 if (nlh && !row->par()->getLabelWidthString().empty()) {
2030                         fill_label_hfill = labelFill(bview, row) / nlh;
2031                 }
2032         }
2033
2034         // are there any hfills in the row?
2035         float const nh = numberOfHfills(bview->buffer(), row);
2036
2037         if (nh) {
2038                 if (w > 0)
2039                         fill_hfill = w / nh;
2040         } else  {
2041                 // is it block, flushleft or flushright?
2042                 // set x how you need it
2043                 int align;
2044                 if (row->par()->params().align() == LYX_ALIGN_LAYOUT) {
2045                         align = textclasslist.Style(bview->buffer()->params.textclass, row->par()->getLayout()).align;
2046                 } else {
2047                         align = row->par()->params().align();
2048                 }
2049
2050                 // center displayed insets
2051                 Inset * inset;
2052                 if (row->par()->getChar(row->pos()) == Paragraph::META_INSET
2053                     && (inset=row->par()->getInset(row->pos()))
2054                     && (inset->display())) // || (inset->scroll() < 0)))
2055                     align = (inset->lyxCode() == Inset::MATHMACRO_CODE)
2056                         ? LYX_ALIGN_BLOCK : LYX_ALIGN_CENTER;
2057
2058                 switch (align) {
2059             case LYX_ALIGN_BLOCK:
2060                         ns = numberOfSeparators(bview->buffer(), row);
2061                         if (ns && row->next() && row->next()->par() == row->par() &&
2062                             !(row->next()->par()->isNewline(row->next()->pos() - 1))
2063                             && !(row->next()->par()->getChar(row->next()->pos()) == Paragraph::META_INSET
2064                                  && row->next()->par()->getInset(row->next()->pos())
2065                                  && row->next()->par()->getInset(row->next()->pos())->display())
2066                                 )
2067                         {
2068                                 fill_separator = w / ns;
2069                         } else if (is_rtl) {
2070                                 x += w;
2071                         }
2072                         break;
2073             case LYX_ALIGN_RIGHT:
2074                         x += w;
2075                         break;
2076             case LYX_ALIGN_CENTER:
2077                         x += w / 2;
2078                         break;
2079                 }
2080         }
2081         if (!bidi)
2082                 return;
2083
2084         computeBidiTables(bview->buffer(), row);
2085         if (is_rtl) {
2086                 Paragraph::size_type main_body =
2087                         beginningOfMainBody(bview->buffer(), row->par());
2088                 Paragraph::size_type last = rowLast(row);
2089
2090                 if (main_body > 0 &&
2091                     (main_body-1 > last ||
2092                      !row->par()->isLineSeparator(main_body-1))) {
2093                         LyXLayout const & layout =
2094                                 textclasslist.Style(bview->buffer()->params.textclass,
2095                                                     row->par()->getLayout());
2096                         x += lyxfont::width(layout.labelsep,
2097                                             getLabelFont(bview->buffer(), row->par()));
2098                         if (main_body-1 <= last)
2099                                 x += fill_label_hfill;
2100                 }
2101         }
2102 }
2103
2104 /* important for the screen */
2105
2106
2107 /* the cursor set functions have a special mechanism. When they
2108 * realize, that you left an empty paragraph, they will delete it.
2109 * They also delete the corresponding row */
2110
2111 void LyXText::cursorRightOneWord(BufferView * bview) const
2112 {
2113         // treat floats, HFills and Insets as words
2114         LyXCursor tmpcursor = cursor;
2115         // CHECK See comment on top of text.C
2116
2117         if (tmpcursor.pos() == tmpcursor.par()->size()
2118             && tmpcursor.par()->next()) {
2119                         tmpcursor.par(tmpcursor.par()->next());
2120                         tmpcursor.pos(0);
2121         } else {
2122                 int steps = 0;
2123
2124                 // Skip through initial nonword stuff.
2125                 while (tmpcursor.pos() < tmpcursor.par()->size() &&
2126                        ! tmpcursor.par()->isWord(tmpcursor.pos())) {
2127                   //    printf("Current pos1 %d", tmpcursor.pos()) ;
2128                         tmpcursor.pos(tmpcursor.pos() + 1);
2129                         ++steps;
2130                 }
2131                 // Advance through word.
2132                 while (tmpcursor.pos() < tmpcursor.par()->size() &&
2133                         tmpcursor.par()->isWord( tmpcursor.pos())) {
2134                   //     printf("Current pos2 %d", tmpcursor.pos()) ;
2135                         tmpcursor.pos(tmpcursor.pos() + 1);
2136                         ++steps;
2137                 }
2138         }
2139         setCursor(bview, tmpcursor.par(), tmpcursor.pos());
2140 }
2141
2142
2143 void LyXText::cursorTab(BufferView * bview) const
2144 {
2145     LyXCursor tmpcursor = cursor;
2146     while (tmpcursor.pos() < tmpcursor.par()->size()
2147            && !tmpcursor.par()->isNewline(tmpcursor.pos()))
2148         tmpcursor.pos(tmpcursor.pos() + 1);
2149
2150     if (tmpcursor.pos() == tmpcursor.par()->size()){
2151         if (tmpcursor.par()->next()) {
2152             tmpcursor.par(tmpcursor.par()->next());
2153             tmpcursor.pos(0);
2154         }
2155     } else
2156         tmpcursor.pos(tmpcursor.pos() + 1);
2157     setCursor(bview, tmpcursor.par(), tmpcursor.pos());
2158 }
2159
2160
2161 /* -------> Skip initial whitespace at end of word and move cursor to *start*
2162             of prior word, not to end of next prior word. */
2163
2164 void LyXText::cursorLeftOneWord(BufferView * bview)  const
2165 {
2166         LyXCursor tmpcursor = cursor;
2167         cursorLeftOneWord(tmpcursor);
2168         setCursor(bview, tmpcursor.par(), tmpcursor.pos());
2169 }
2170
2171 void LyXText::cursorLeftOneWord(LyXCursor  & cur)  const
2172 {
2173         // treat HFills, floats and Insets as words
2174         cur = cursor;
2175         while (cur.pos()
2176                && (cur.par()->isSeparator(cur.pos() - 1)
2177                    || cur.par()->isKomma(cur.pos() - 1))
2178                && !(cur.par()->isHfill(cur.pos() - 1)
2179                     || cur.par()->isInset(cur.pos() - 1)))
2180                 cur.pos(cur.pos() - 1);
2181
2182         if (cur.pos()
2183             && (cur.par()->isInset(cur.pos() - 1)
2184                 || cur.par()->isHfill(cur.pos() - 1))) {
2185                 cur.pos(cur.pos() - 1);
2186         } else if (!cur.pos()) {
2187                 if (cur.par()->previous()){
2188                         cur.par(cur.par()->previous());
2189                         cur.pos(cur.par()->size());
2190                 }
2191         } else {                // Here, cur != 0
2192                 while (cur.pos() > 0 &&
2193                        cur.par()->isWord(cur.pos()-1) )
2194                         cur.pos(cur.pos() - 1);
2195         }
2196 }
2197
2198 /* -------> Select current word. This depends on behaviour of
2199 CursorLeftOneWord(), so it is patched as well. */
2200 void LyXText::getWord(LyXCursor & from, LyXCursor & to,
2201                       word_location const loc) const
2202 {
2203         // first put the cursor where we wana start to select the word
2204         from = cursor;
2205         switch(loc) {
2206         case WHOLE_WORD_STRICT:
2207                 if (cursor.pos() == 0 || cursor.pos() == cursor.par()->size()
2208                     || cursor.par()->isSeparator(cursor.pos())
2209                     || cursor.par()->isKomma(cursor.pos())
2210                     || cursor.par()->isSeparator(cursor.pos() -1)
2211                     || cursor.par()->isKomma(cursor.pos() -1)) {
2212                         to = from;
2213                         return;
2214                 }
2215                 // no break here, we go to the next
2216
2217         case WHOLE_WORD:
2218                 // Move cursor to the beginning, when not already there.
2219                 if (from.pos() && !from.par()->isSeparator(from.pos() - 1)
2220                     && !from.par()->isKomma(from.pos() - 1))
2221                         cursorLeftOneWord(from);
2222                 break;
2223         case PREVIOUS_WORD:
2224                 // always move the cursor to the beginning of previous word
2225                 cursorLeftOneWord(from);
2226                 break;
2227         case NEXT_WORD:
2228                 lyxerr << "LyXText::getWord: NEXT_WORD not implemented yet\n";
2229                 break;
2230         case PARTIAL_WORD:
2231                 break;
2232         }
2233         to = from;
2234         while (to.pos() < to.par()->size()
2235                && !to.par()->isSeparator(to.pos())
2236                && !to.par()->isKomma(to.pos())
2237                && !to.par()->isHfill(to.pos()) )
2238         {
2239                 to.pos(to.pos() + 1);
2240         }
2241 }
2242
2243
2244 void LyXText::selectWord(BufferView * bview, word_location const loc)
2245 {
2246         LyXCursor from;
2247         LyXCursor to;
2248         getWord(from, to, loc);
2249         if (cursor != from)
2250                 setCursor(bview, from.par(), from.pos());
2251         if (to == from)
2252                 return;
2253         selection.cursor = cursor;
2254         setCursor(bview, to.par(), to.pos() );
2255         setSelection(bview);
2256 }
2257
2258
2259 /* -------> Select the word currently under the cursor when no
2260         selection is currently set */
2261 bool LyXText::selectWordWhenUnderCursor(BufferView * bview,
2262                                         word_location const loc)
2263 {
2264         if (!selection.set()) {
2265                 selectWord(bview, loc);
2266                 return selection.set();
2267         }
2268         return false;
2269 }
2270
2271
2272 // This function is only used by the spellchecker for NextWord().
2273 // It doesn't handle LYX_ACCENTs and probably never will.
2274 string const LyXText::selectNextWordToSpellcheck(BufferView * bview,
2275                                      float & value) const
2276 {
2277         if (the_locking_inset) {
2278                 string str = the_locking_inset->selectNextWordToSpellcheck(bview, value);
2279                 if (!str.empty()) {
2280                         value += float(cursor.y())/float(height);
2281                         return str;
2282                 }
2283 #warning Dekel please have a look on this one RTL? (Jug)
2284 #warning DEKEL!
2285                 // we have to go on checking so move cusor to the right
2286                 if (cursor.pos() == cursor.par()->size()) {
2287                         if (!cursor.par()->next())
2288                                 return str;
2289                         cursor.par(cursor.par()->next());
2290                         cursor.pos(0);
2291                 } else
2292                         cursor.pos(cursor.pos() + 1);
2293         }
2294         Paragraph * tmppar = cursor.par();
2295
2296         // If this is not the very first word, skip rest of
2297         // current word because we are probably in the middle
2298         // of a word if there is text here.
2299         if (cursor.pos() || cursor.par()->previous()) {
2300                 while (cursor.pos() < cursor.par()->size()
2301                        && cursor.par()->isLetter(cursor.pos()))
2302                         cursor.pos(cursor.pos() + 1);
2303         }
2304
2305         // Now, skip until we have real text (will jump paragraphs)
2306         while ((cursor.par()->size() > cursor.pos()
2307                && (!cursor.par()->isLetter(cursor.pos()))
2308                && (!cursor.par()->isInset(cursor.pos()) ||
2309                    !cursor.par()->getInset(cursor.pos())->isTextInset()))
2310                || (cursor.par()->size() == cursor.pos()
2311                    && cursor.par()->next()))
2312         {
2313                 if (cursor.pos() == cursor.par()->size()) {
2314                         cursor.par(cursor.par()->next());
2315                         cursor.pos(0);
2316                 } else
2317                         cursor.pos(cursor.pos() + 1);
2318         }
2319
2320         // now check if we hit an inset so it has to be a inset containing text!
2321         if (cursor.pos() < cursor.par()->size() &&
2322             cursor.par()->isInset(cursor.pos()))
2323         {
2324                 // lock the inset!
2325                 cursor.par()->getInset(cursor.pos())->edit(bview);
2326                 // now call us again to do the above trick
2327                 // but obviously we have to start from down below ;)
2328                 return bview->text->selectNextWordToSpellcheck(bview, value);
2329         }
2330
2331         // Update the value if we changed paragraphs
2332         if (cursor.par() != tmppar){
2333                 setCursor(bview, cursor.par(), cursor.pos());
2334                 value = float(cursor.y())/float(height);
2335         }
2336
2337         // Start the selection from here
2338         selection.cursor = cursor;
2339
2340         Inset * inset;
2341
2342         // and find the end of the word
2343         // (optional hyphens are part of a word)
2344         while (cursor.pos() < cursor.par()->size()
2345                && (cursor.par()->isLetter(cursor.pos()))
2346                // assignment is intentional here
2347                || ((inset = getInset())
2348                    && inset->lyxCode() == Inset::SPECIALCHAR_CODE
2349                    && static_cast<InsetSpecialChar *>(inset)->kind()
2350                         == InsetSpecialChar::HYPHENATION
2351                    ))
2352                 cursor.pos(cursor.pos() + 1);
2353
2354         // Finally, we copy the word to a string and return it
2355         string str;
2356         if (selection.cursor.pos() < cursor.pos()) {
2357                 Paragraph::size_type i;
2358                 for (i = selection.cursor.pos(); i < cursor.pos(); ++i) {
2359                         if (cursor.par()->getChar(i) != Paragraph::META_INSET)
2360                                 str += cursor.par()->getChar(i);
2361                 }
2362         }
2363         return str;
2364 }
2365
2366
2367 // This one is also only for the spellchecker
2368 void LyXText::selectSelectedWord(BufferView * bview)
2369 {
2370         if (the_locking_inset) {
2371                 the_locking_inset->selectSelectedWord(bview);
2372                 return;
2373         }
2374         // move cursor to the beginning
2375         setCursor(bview, selection.cursor.par(), selection.cursor.pos());
2376
2377         // set the sel cursor
2378         selection.cursor = cursor;
2379         Inset * inset;
2380
2381         // now find the end of the word
2382         while (cursor.pos() < cursor.par()->size()
2383                && (cursor.par()->isLetter(cursor.pos())
2384                    // assignment is intentional here
2385                    || ((inset = getInset())
2386                        && inset->lyxCode() == Inset::SPECIALCHAR_CODE
2387                        && static_cast<InsetSpecialChar *>(inset)->kind()
2388                                 == InsetSpecialChar::HYPHENATION
2389                        )))
2390                 cursor.pos(cursor.pos() + 1);
2391
2392         setCursor(bview, cursor.par(), cursor.pos());
2393
2394         // finally set the selection
2395         setSelection(bview);
2396 }
2397
2398
2399 /* -------> Delete from cursor up to the end of the current or next word. */
2400 void LyXText::deleteWordForward(BufferView * bview)
2401 {
2402         if (!cursor.par()->size())
2403                 cursorRight(bview);
2404         else {
2405                 LyXCursor tmpcursor = cursor;
2406                 tmpcursor.row(0); // ??
2407                 selection.set(true); // to avoid deletion
2408                 cursorRightOneWord(bview);
2409                 setCursor(bview, tmpcursor, tmpcursor.par(), tmpcursor.pos());
2410                 selection.cursor = cursor;
2411                 cursor = tmpcursor;
2412                 setSelection(bview);
2413
2414                 /* -----> Great, CutSelection() gets rid of multiple spaces. */
2415                 cutSelection(bview, true, false);
2416         }
2417 }
2418
2419
2420 /* -------> Delete from cursor to start of current or prior word. */
2421 void LyXText::deleteWordBackward(BufferView * bview)
2422 {
2423        if (!cursor.par()->size())
2424                cursorLeft(bview);
2425        else {
2426                LyXCursor tmpcursor = cursor;
2427                tmpcursor.row(0); // ??
2428                selection.set(true); // to avoid deletion
2429                cursorLeftOneWord(bview);
2430                setCursor(bview, tmpcursor, tmpcursor.par(), tmpcursor.pos());
2431                selection.cursor = cursor;
2432                cursor = tmpcursor;
2433                setSelection(bview);
2434                cutSelection(bview, true, false);
2435        }
2436 }
2437
2438
2439 /* -------> Kill to end of line. */
2440 void LyXText::deleteLineForward(BufferView * bview)
2441 {
2442         if (!cursor.par()->size())
2443                 // Paragraph is empty, so we just go to the right
2444                 cursorRight(bview);
2445         else {
2446                 LyXCursor tmpcursor = cursor;
2447                 // We can't store the row over a regular setCursor
2448                 // so we set it to 0 and reset it afterwards.
2449                 tmpcursor.row(0); // ??
2450                 selection.set(true); // to avoid deletion
2451                 cursorEnd(bview);
2452                 setCursor(bview, tmpcursor, tmpcursor.par(), tmpcursor.pos());
2453                 selection.cursor = cursor;
2454                 cursor = tmpcursor;
2455                 setSelection(bview);
2456                 // What is this test for ??? (JMarc)
2457                 if (!selection.set()) {
2458                         deleteWordForward(bview);
2459                 } else {
2460                         cutSelection(bview, true, false);
2461                 }
2462         }
2463 }
2464
2465
2466 // Change the case of a word at cursor position.
2467 // This function directly manipulates Paragraph::text because there
2468 // is no Paragraph::SetChar currently. I did what I could to ensure
2469 // that it is correct. I guess part of it should be moved to
2470 // Paragraph, but it will have to change for 1.1 anyway. At least
2471 // it does not access outside of the allocated array as the older
2472 // version did. (JMarc)
2473 void LyXText::changeCase(BufferView * bview, LyXText::TextCase action)
2474 {
2475         LyXCursor from;
2476         LyXCursor to;
2477
2478         if (selection.set()) {
2479                 from = selection.start;
2480                 to = selection.end;
2481         } else {
2482                 getWord(from, to, PARTIAL_WORD);
2483                 setCursor(bview, to.par(), to.pos() + 1);
2484         }
2485
2486         changeRegionCase(bview, from, to, action);
2487 }
2488
2489
2490 void LyXText::changeRegionCase(BufferView * bview,
2491                                LyXCursor const & from,
2492                                LyXCursor const & to,
2493                                LyXText::TextCase action)
2494 {
2495         lyx::Assert(from <= to);
2496
2497         setUndo(bview, Undo::FINISH,
2498                 from.par(), to.par()->next());
2499
2500         Paragraph::size_type pos = from.pos();
2501         Paragraph * par = from.par();
2502
2503         while (par && (pos != to.pos() || par != to.par())) {
2504                 unsigned char c = par->getChar(pos);
2505                 if (!IsInsetChar(c) && !IsHfillChar(c)) {
2506                         switch (action) {
2507                         case text_lowercase:
2508                                 c = tolower(c);
2509                                 break;
2510                         case text_capitalization:
2511                                 c = toupper(c);
2512                                 action = text_lowercase;
2513                                 break;
2514                         case text_uppercase:
2515                                 c = toupper(c);
2516                                 break;
2517                         }
2518                 }
2519                 par->setChar(pos, c);
2520                 checkParagraph(bview, par, pos);
2521
2522                 ++pos;
2523                 if (pos == par->size()) {
2524                         par = par->next();
2525                         pos = 0;
2526                 }
2527         }
2528         if (to.row() != from.row()) {
2529                 refresh_y = from.y() - from.row()->baseline();
2530                 refresh_row = from.row();
2531                 status(bview, LyXText::NEED_MORE_REFRESH);
2532         }
2533 }
2534
2535
2536 void LyXText::transposeChars(BufferView & bview)
2537 {
2538         Paragraph * tmppar = cursor.par();
2539
2540         setUndo(&bview, Undo::FINISH,
2541                 tmppar, tmppar->next());
2542
2543         Paragraph::size_type tmppos = cursor.pos();
2544
2545         // First decide if it is possible to transpose at all
2546
2547         // We are at the beginning of a paragraph.
2548         if (tmppos == 0) return;
2549
2550         // We are at the end of a paragraph.
2551         if (tmppos == tmppar->size() - 1) return;
2552
2553         unsigned char c1 = tmppar->getChar(tmppos);
2554         unsigned char c2 = tmppar->getChar(tmppos - 1);
2555
2556         if (c1 != Paragraph::META_INSET
2557             && c2 != Paragraph::META_INSET) {
2558                 tmppar->setChar(tmppos, c2);
2559                 tmppar->setChar(tmppos - 1, c1);
2560         }
2561         // We should have an implementation that handles insets
2562         // as well, but that will have to come later. (Lgb)
2563         checkParagraph(const_cast<BufferView*>(&bview), tmppar, tmppos);
2564 }
2565
2566
2567 void LyXText::Delete(BufferView * bview)
2568 {
2569         // this is a very easy implementation
2570
2571         LyXCursor old_cursor = cursor;
2572         int const old_cur_par_id = old_cursor.par()->id();
2573         int const old_cur_par_prev_id = old_cursor.par()->previous() ?
2574                 old_cursor.par()->previous()->id() : 0;
2575
2576         // just move to the right
2577         cursorRight(bview);
2578
2579         // CHECK Look at the comment here.
2580         // This check is not very good...
2581         // The cursorRightIntern calls DeleteEmptyParagrapgMechanism
2582         // and that can very well delete the par or par->previous in
2583         // old_cursor. Will a solution where we compare paragraph id's
2584         //work better?
2585         if ((cursor.par()->previous() ? cursor.par()->previous()->id() : 0)
2586             == old_cur_par_prev_id
2587             && cursor.par()->id() != old_cur_par_id)
2588         {
2589                 return; // delete-empty-paragraph-mechanism has done it
2590         }
2591
2592         // if you had success make a backspace
2593         if (old_cursor.par() != cursor.par() || old_cursor.pos() != cursor.pos()) {
2594                 LyXCursor tmpcursor = cursor;
2595                 cursor = old_cursor; // to make sure undo gets the right cursor position
2596                 setUndo(bview, Undo::DELETE,
2597                         cursor.par(), cursor.par()->next());
2598                 cursor = tmpcursor;
2599                 backspace(bview);
2600         }
2601 }
2602
2603
2604 void LyXText::backspace(BufferView * bview)
2605 {
2606         // Get the font that is used to calculate the baselineskip
2607         Paragraph::size_type lastpos = cursor.par()->size();
2608         LyXFont rawparfont =
2609                 cursor.par()->getFontSettings(bview->buffer()->params,
2610                                               lastpos - 1);
2611
2612         if (cursor.pos() == 0) {
2613                 // The cursor is at the beginning of a paragraph,
2614                 // so the the backspace will collapse two paragraphs into one.
2615
2616                 // we may paste some paragraphs
2617
2618                 // is it an empty paragraph?
2619
2620                 if ((lastpos == 0
2621                      || (lastpos == 1 && cursor.par()->isSeparator(0)))) {
2622                         // This is an empty paragraph and we delete it just by moving the cursor one step
2623                         // left and let the DeleteEmptyParagraphMechanism handle the actual deletion
2624                         // of the paragraph.
2625
2626                         if (cursor.par()->previous()) {
2627                                 Paragraph * tmppar = cursor.par()->previous();
2628                                 if (cursor.par()->getLayout() == tmppar->getLayout()
2629                                     && cursor.par()->getAlign() == tmppar->getAlign()) {
2630                                         // Inherit bottom DTD from the paragraph below.
2631                                         // (the one we are deleting)
2632                                         tmppar->params().lineBottom(cursor.par()->params().lineBottom());
2633                                         tmppar->params().spaceBottom(cursor.par()->params().spaceBottom());
2634                                         tmppar->params().pagebreakBottom(cursor.par()->params().pagebreakBottom());
2635                                 }
2636
2637                                 cursorLeft(bview);
2638
2639                                 // the layout things can change the height of a row !
2640                                 int const tmpheight = cursor.row()->height();
2641                                 setHeightOfRow(bview, cursor.row());
2642                                 if (cursor.row()->height() != tmpheight) {
2643                                         refresh_y = cursor.y() - cursor.row()->baseline();
2644                                         refresh_row = cursor.row();
2645                                         status(bview, LyXText::NEED_MORE_REFRESH);
2646                                 }
2647                                 return;
2648                         }
2649                 }
2650
2651                 if (cursor.par()->previous()) {
2652                         setUndo(bview, Undo::DELETE,
2653                                 cursor.par()->previous(), cursor.par()->next());
2654                 }
2655
2656                 Paragraph * tmppar = cursor.par();
2657                 Row * tmprow = cursor.row();
2658
2659                 // We used to do cursorLeftIntern() here, but it is
2660                 // not a good idea since it triggers the auto-delete
2661                 // mechanism. So we do a cursorLeftIntern()-lite,
2662                 // without the dreaded mechanism. (JMarc)
2663                 if (cursor.par()->previous()) {
2664                         // steps into the above paragraph.
2665                         setCursorIntern(bview, cursor.par()->previous(),
2666                                         cursor.par()->previous()->size(),
2667                                         false);
2668                 }
2669
2670                 /* Pasting is not allowed, if the paragraphs have different
2671                    layout. I think it is a real bug of all other
2672                    word processors to allow it. It confuses the user.
2673                    Even so with a footnote paragraph and a non-footnote
2674                    paragraph. I will not allow pasting in this case,
2675                    because the user would be confused if the footnote behaves
2676                    different wether it is open or closed.
2677
2678                    Correction: Pasting is always allowed with standard-layout
2679                 */
2680                 if (cursor.par() != tmppar
2681                     && (cursor.par()->getLayout() == tmppar->getLayout()
2682                         || tmppar->getLayout() == 0 /*standard*/)
2683                     && cursor.par()->getAlign() == tmppar->getAlign())
2684                 {
2685                         removeParagraph(tmprow);
2686                         removeRow(tmprow);
2687                         cursor.par()->pasteParagraph(bview->buffer()->params);
2688
2689                         if (!cursor.pos() || !cursor.par()->isSeparator(cursor.pos() - 1))
2690                                 ; //cursor.par()->insertChar(cursor.pos(), ' ');
2691                         // strangely enough it seems that commenting out the line above removes
2692                         // most or all of the segfaults. I will however also try to move the
2693                         // two Remove... lines in front of the PasteParagraph too.
2694                         else
2695                                 if (cursor.pos())
2696                                         cursor.pos(cursor.pos() - 1);
2697
2698                         status(bview, LyXText::NEED_MORE_REFRESH);
2699                         refresh_row = cursor.row();
2700                         refresh_y = cursor.y() - cursor.row()->baseline();
2701
2702                         // remove the lost paragraph
2703                         // This one is not safe, since the paragraph that the tmprow and the
2704                         // following rows belong to has been deleted by the PasteParagraph
2705                         // above. The question is... could this be moved in front of the
2706                         // PasteParagraph?
2707                         //RemoveParagraph(tmprow);
2708                         //RemoveRow(tmprow);
2709
2710                         // This rebuilds the rows.
2711                         appendParagraph(bview, cursor.row());
2712                         updateCounters(bview, cursor.row());
2713
2714                         // the row may have changed, block, hfills etc.
2715                         setCursor(bview, cursor.par(), cursor.pos(), false);
2716                 }
2717         } else {
2718                 /* this is the code for a normal backspace, not pasting
2719                  * any paragraphs */
2720                 setUndo(bview, Undo::DELETE,
2721                         cursor.par(), cursor.par()->next());
2722                 // We used to do cursorLeftIntern() here, but it is
2723                 // not a good idea since it triggers the auto-delete
2724                 // mechanism. So we do a cursorLeftIntern()-lite,
2725                 // without the dreaded mechanism. (JMarc)
2726                 setCursorIntern(bview, cursor.par(), cursor.pos()- 1,
2727                                 false, cursor.boundary());
2728
2729                 // some insets are undeletable here
2730                 if (cursor.par()->getChar(cursor.pos()) == Paragraph::META_INSET) {
2731                         if (!cursor.par()->getInset(cursor.pos())->deletable())
2732                                 return;
2733                         // force complete redo when erasing display insets
2734                         // this is a cruel method but safe..... Matthias
2735                         if (cursor.par()->getInset(cursor.pos())->display() ||
2736                             cursor.par()->getInset(cursor.pos())->needFullRow()) {
2737                                 cursor.par()->erase(cursor.pos());
2738                                 redoParagraph(bview);
2739                                 return;
2740                         }
2741                 }
2742
2743                 Row * row = cursor.row();
2744                 int y = cursor.y() - row->baseline();
2745                 Paragraph::size_type z;
2746                 /* remember that a space at the end of a row doesnt count
2747                  * when calculating the fill */
2748                 if (cursor.pos() < rowLast(row) ||
2749                     !cursor.par()->isLineSeparator(cursor.pos())) {
2750                         row->fill(row->fill() + singleWidth(bview,
2751                                                             cursor.par(),
2752                                                             cursor.pos()));
2753                 }
2754
2755                 /* some special code when deleting a newline. This is similar
2756                  * to the behavior when pasting paragraphs */
2757                 if (cursor.pos() && cursor.par()->isNewline(cursor.pos())) {
2758                         cursor.par()->erase(cursor.pos());
2759                         // refresh the positions
2760                         Row * tmprow = row;
2761                         while (tmprow->next() && tmprow->next()->par() == row->par()) {
2762                                 tmprow = tmprow->next();
2763                                 tmprow->pos(tmprow->pos() - 1);
2764                         }
2765                         if (cursor.par()->isLineSeparator(cursor.pos() - 1))
2766                                 cursor.pos(cursor.pos() - 1);
2767
2768                         if (cursor.pos() < cursor.par()->size()
2769                             && !cursor.par()->isSeparator(cursor.pos())) {
2770                                 cursor.par()->insertChar(cursor.pos(), ' ');
2771                                 setCharFont(bview->buffer(), cursor.par(),
2772                                             cursor.pos(), current_font);
2773                                 // refresh the positions
2774                                 tmprow = row;
2775                                 while (tmprow->next() && tmprow->next()->par() == row->par()) {
2776                                         tmprow = tmprow->next();
2777                                         tmprow->pos(tmprow->pos() + 1);
2778                                 }
2779                         }
2780                 } else {
2781                         cursor.par()->erase(cursor.pos());
2782
2783                         // refresh the positions
2784                         Row * tmprow = row;
2785                         while (tmprow->next()
2786                                && tmprow->next()->par() == row->par()) {
2787                                 tmprow = tmprow->next();
2788                                 tmprow->pos(tmprow->pos() - 1);
2789                         }
2790
2791                         // delete newlines at the beginning of paragraphs
2792                         while (cursor.par()->size() &&
2793                                cursor.par()->isNewline(cursor.pos()) &&
2794                                cursor.pos() == beginningOfMainBody(bview->buffer(),
2795                                                                    cursor.par())) {
2796                                 cursor.par()->erase(cursor.pos());
2797                                 // refresh the positions
2798                                 tmprow = row;
2799                                 while (tmprow->next() &&
2800                                        tmprow->next()->par() == row->par()) {
2801                                         tmprow = tmprow->next();
2802                                         tmprow->pos(tmprow->pos() - 1);
2803                                 }
2804                         }
2805                 }
2806
2807                 // is there a break one row above
2808                 if (row->previous() && row->previous()->par() == row->par()) {
2809                         z = nextBreakPoint(bview, row->previous(),
2810                                            workWidth(bview));
2811                         if (z >= row->pos()) {
2812                                 row->pos(z + 1);
2813
2814                                 Row * tmprow = row->previous();
2815
2816                                 // maybe the current row is now empty
2817                                 if (row->pos() >= row->par()->size()) {
2818                                         // remove it
2819                                         removeRow(row);
2820                                         need_break_row = 0;
2821                                 } else {
2822                                         breakAgainOneRow(bview, row);
2823                                         if (row->next() && row->next()->par() == row->par())
2824                                                 need_break_row = row->next();
2825                                         else
2826                                                 need_break_row = 0;
2827                                 }
2828
2829                                 // set the dimensions of the row above
2830                                 y -= tmprow->height();
2831                                 tmprow->fill(fill(bview, tmprow,
2832                                                   workWidth(bview)));
2833                                 setHeightOfRow(bview, tmprow);
2834
2835                                 refresh_y = y;
2836                                 refresh_row = tmprow;
2837                                 status(bview, LyXText::NEED_MORE_REFRESH);
2838                                 setCursor(bview, cursor.par(), cursor.pos(),
2839                                           false, cursor.boundary());
2840                                 //current_font = rawtmpfont;
2841                                 //real_current_font = realtmpfont;
2842                                 // check, whether the last character's font has changed.
2843                                 if (rawparfont !=
2844                                     cursor.par()->getFontSettings(bview->buffer()->params,
2845                                                                   cursor.par()->size() - 1))
2846                                         redoHeightOfParagraph(bview, cursor);
2847                                 return;
2848                         }
2849                 }
2850
2851                 // break the cursor row again
2852                 if (row->next() && row->next()->par() == row->par() &&
2853                     (rowLast(row) == row->par()->size() - 1 ||
2854                      nextBreakPoint(bview, row, workWidth(bview)) != rowLast(row))) {
2855
2856                         /* it can happen that a paragraph loses one row
2857                          * without a real breakup. This is when a word
2858                          * is to long to be broken. Well, I don t care this
2859                          * hack ;-) */
2860                         if (rowLast(row) == row->par()->size() - 1)
2861                                 removeRow(row->next());
2862
2863                         refresh_y = y;
2864                         refresh_row = row;
2865                         status(bview, LyXText::NEED_MORE_REFRESH);
2866
2867                         breakAgainOneRow(bview, row);
2868                         // will the cursor be in another row now?
2869                         if (row->next() && row->next()->par() == row->par() &&
2870                             rowLast(row) <= cursor.pos()) {
2871                                 row = row->next();
2872                                 breakAgainOneRow(bview, row);
2873                         }
2874
2875                         setCursor(bview, cursor.par(), cursor.pos(), false, cursor.boundary());
2876
2877                         if (row->next() && row->next()->par() == row->par())
2878                                 need_break_row = row->next();
2879                         else
2880                                 need_break_row = 0;
2881                 } else  {
2882                         // set the dimensions of the row
2883                         row->fill(fill(bview, row, workWidth(bview)));
2884                         int const tmpheight = row->height();
2885                         setHeightOfRow(bview, row);
2886                         if (tmpheight == row->height())
2887                                 status(bview, LyXText::NEED_VERY_LITTLE_REFRESH);
2888                         else
2889                                 status(bview, LyXText::NEED_MORE_REFRESH);
2890                         refresh_y = y;
2891                         refresh_row = row;
2892                         setCursor(bview, cursor.par(), cursor.pos(), false, cursor.boundary());
2893                 }
2894         }
2895
2896         // current_font = rawtmpfont;
2897         // real_current_font = realtmpfont;
2898
2899         if (isBoundary(bview->buffer(), cursor.par(), cursor.pos())
2900             != cursor.boundary())
2901                 setCursor(bview, cursor.par(), cursor.pos(), false,
2902                           !cursor.boundary());
2903
2904         lastpos = cursor.par()->size();
2905         if (cursor.pos() == lastpos)
2906                 setCurrentFont(bview);
2907
2908         // check, whether the last characters font has changed.
2909         if (rawparfont !=
2910             cursor.par()->getFontSettings(bview->buffer()->params, lastpos - 1)) {
2911                 redoHeightOfParagraph(bview, cursor);
2912         } else {
2913                 // now the special right address boxes
2914                 if (textclasslist.Style(bview->buffer()->params.textclass,
2915                                         cursor.par()->getLayout()).margintype == MARGIN_RIGHT_ADDRESS_BOX) {
2916                         redoDrawingOfParagraph(bview, cursor);
2917                 }
2918         }
2919 }
2920
2921
2922 void LyXText::getVisibleRow(BufferView * bview, int y_offset, int x_offset,
2923                             Row * row_ptr, int y, bool cleared)
2924 {
2925         // returns a printed row
2926         Painter & pain = bview->painter();
2927
2928         bool const is_rtl =
2929                 row_ptr->par()->isRightToLeftPar(bview->buffer()->params);
2930
2931         Paragraph::size_type const last = rowLastPrintable(row_ptr);
2932
2933         Paragraph::size_type vpos;
2934         Paragraph::size_type pos;
2935
2936         float tmpx;
2937
2938         LyXFont font(LyXFont::ALL_SANE);
2939         int maxdesc;
2940         if (row_ptr->height() <= 0) {
2941                 lyxerr << "LYX_ERROR: row.height: "
2942                        << row_ptr->height() << endl;
2943                 return;
2944         }
2945
2946         float x;
2947         float fill_separator;
2948         float fill_hfill;
2949         float fill_label_hfill;
2950         prepareToPrint(bview, row_ptr, x, fill_separator,
2951                        fill_hfill, fill_label_hfill);
2952
2953         if (inset_owner && (x < 0))
2954                 x = 0;
2955         x += x_offset;
2956
2957         // clear the area where we want to paint/print
2958         int const ww = bview->workWidth();
2959
2960         bool clear_area = true;
2961         Inset * inset = 0;
2962
2963         if (!bview->screen()->forceClear() && last == row_ptr->pos()
2964             && row_ptr->par()->getChar(row_ptr->pos()) == Paragraph::META_INSET
2965             && (inset = row_ptr->par()->getInset(row_ptr->pos()))) {
2966                 clear_area = inset->doClearArea();
2967         }
2968         // we don't need to clear it's already done!!!
2969         if (cleared) {
2970                 clear_area = true;
2971         } else if (clear_area) {
2972                 int const y = y_offset < 0 ? 0 : y_offset;
2973                 int const h = y_offset < 0 ?
2974                         row_ptr->height() + y_offset : row_ptr->height();
2975                 int const w = inset_owner ?
2976                         inset_owner->textWidth(bview, true) : ww;
2977                 int const x = x_offset;
2978                 pain.fillRectangle(x, y, w, h, backgroundColor());
2979         } else if (inset != 0) {
2980                 int h = row_ptr->baseline() - inset->ascent(bview, font);
2981                 // first clear the whole row above the inset!
2982                 if (h > 0) {
2983                         int const w = (inset_owner ?
2984                                  inset_owner->textWidth(bview, true) : ww);
2985                         pain.fillRectangle(x_offset, y_offset, w, h,
2986                                            backgroundColor());
2987                 }
2988                 h += inset->ascent(bview, font) + inset->descent(bview, font);
2989                 // clear the space below the inset!
2990                 if ((row_ptr->height() - h) > 0) {
2991                         int const w = (inset_owner ?
2992                                        inset_owner->textWidth(bview, true) : ww);
2993                         pain.fillRectangle(x_offset, y_offset + h,
2994                                            w, row_ptr->height() - h,
2995                                            backgroundColor());
2996                 }
2997                 // clear the space behind the inset, if needed
2998                 if (!inset->display() && !inset->needFullRow()) {
2999                         int const w = (inset_owner ?
3000                                        inset_owner->textWidth(bview, true) : ww);
3001                         int const xp = int(x) + inset->width(bview, font);
3002                         if (w-xp > 0) {
3003                                 pain.fillRectangle(xp, y_offset,
3004                                                    w-xp, row_ptr->height(),
3005                                                    backgroundColor());
3006                         }
3007                 }
3008         }
3009
3010         if (selection.set()) {
3011                 int const w = (inset_owner ?
3012                                inset_owner->textWidth(bview, true) : ww);
3013                 // selection code
3014                 if (bidi_same_direction) {
3015                         if (selection.start.row() == row_ptr &&
3016                             selection.end.row() == row_ptr) {
3017                                 if (selection.start.x() < selection.end.x())
3018                                         pain.fillRectangle(x_offset + selection.start.x(),
3019                                                            y_offset,
3020                                                            selection.end.x() - selection.start.x(),
3021                                                            row_ptr->height(),
3022                                                            LColor::selection);
3023                                 else
3024                                         pain.fillRectangle(x_offset + selection.end.x(),
3025                                                            y_offset,
3026                                                            selection.start.x() - selection.end.x(),
3027                                                            row_ptr->height(),
3028                                                            LColor::selection);
3029                         } else if (selection.start.row() == row_ptr) {
3030                                 if (is_rtl)
3031                                         pain.fillRectangle(x_offset, y_offset,
3032                                                            selection.start.x(),
3033                                                            row_ptr->height(),
3034                                                            LColor::selection);
3035                                 else
3036                                         pain.fillRectangle(x_offset + selection.start.x(),
3037                                                            y_offset,
3038                                                            w - selection.start.x(),
3039                                                            row_ptr->height(),
3040                                                            LColor::selection);
3041                         } else if (selection.end.row() == row_ptr) {
3042                                 if (is_rtl)
3043                                         pain.fillRectangle(x_offset + selection.end.x(),
3044                                                            y_offset,
3045                                                            w - selection.end.x(),
3046                                                            row_ptr->height(),
3047                                                            LColor::selection);
3048                                 else
3049                                         pain.fillRectangle(x_offset, y_offset,
3050                                                            selection.end.x(),
3051                                                            row_ptr->height(),
3052                                                            LColor::selection);
3053                         } else if (y > selection.start.y()
3054                                    && y < selection.end.y()) {
3055                                 pain.fillRectangle(x_offset, y_offset, w,
3056                                                    row_ptr->height(),
3057                                                    LColor::selection);
3058                         }
3059                 } else if (selection.start.row() != row_ptr &&
3060                             selection.end.row() != row_ptr &&
3061                             y > selection.start.y()
3062                             && y < selection.end.y()) {
3063                         pain.fillRectangle(x_offset, y_offset, w,
3064                                            row_ptr->height(),
3065                                            LColor::selection);
3066                 } else if (selection.start.row() == row_ptr ||
3067                            selection.end.row() == row_ptr) {
3068                         float tmpx = x;
3069                         if ((selection.start.row() != row_ptr && !is_rtl) ||
3070                              (selection.end.row() != row_ptr && is_rtl))
3071                                 pain.fillRectangle(x_offset, y_offset,
3072                                                    int(tmpx),
3073                                                    row_ptr->height(),
3074                                                    LColor::selection);
3075                         Paragraph::size_type main_body =
3076                                 beginningOfMainBody(bview->buffer(),
3077                                                     row_ptr->par());
3078
3079                         for (vpos = row_ptr->pos(); vpos <= last; ++vpos)  {
3080                                 pos = vis2log(vpos);
3081                                 float const old_tmpx = tmpx;
3082                                 if (main_body > 0 && pos == main_body-1) {
3083                                         tmpx += fill_label_hfill +
3084                                                 lyxfont::width(textclasslist.Style(bview->buffer()->params.textclass,
3085                                                                                    row_ptr->par()->getLayout()).labelsep,
3086                                                                getLabelFont(bview->buffer(),row_ptr->par()));
3087                                         if (row_ptr->par()->isLineSeparator(main_body-1))
3088                                                 tmpx -= singleWidth(bview, row_ptr->par(), main_body-1);
3089                                 }
3090                                 if (hfillExpansion(bview->buffer(), row_ptr, pos)) {
3091                                         tmpx += singleWidth(bview, row_ptr->par(), pos);
3092                                         if (pos >= main_body)
3093                                                 tmpx += fill_hfill;
3094                                         else
3095                                                 tmpx += fill_label_hfill;
3096                                 }
3097                                 else if (row_ptr->par()->isSeparator(pos)) {
3098                                         tmpx += singleWidth(bview, row_ptr->par(), pos);
3099                                         if (pos >= main_body)
3100                                                 tmpx += fill_separator;
3101                                 } else
3102                                         tmpx += singleWidth(bview, row_ptr->par(), pos);
3103
3104                                 if ((selection.start.row() != row_ptr ||
3105                                       selection.start.pos() <= pos) &&
3106                                      (selection.end.row() != row_ptr ||
3107                                       pos < selection.end.pos()) )
3108                                         // Here we do not use x_offset as x_offset was
3109                                         // added to x.
3110                                         pain.fillRectangle(int(old_tmpx),
3111                                                            y_offset,
3112                                                            int(tmpx - old_tmpx + 1),
3113                                                            row_ptr->height(),
3114                                                            LColor::selection);
3115                         }
3116
3117                         if ((selection.start.row() != row_ptr && is_rtl) ||
3118                              (selection.end.row() != row_ptr && !is_rtl) )
3119                                 pain.fillRectangle(x_offset + int(tmpx),
3120                                                    y_offset,
3121                                                    int(ww - tmpx),
3122                                                    row_ptr->height(),
3123                                                    LColor::selection);
3124                 }
3125         }
3126
3127         int box_x = 0;
3128
3129         // Draw appendix lines
3130         Paragraph * firstpar = row_ptr->par();
3131
3132         if (firstpar->params().appendix()) {
3133                 pain.line(1, y_offset,
3134                           1, y_offset + row_ptr->height(),
3135                           LColor::appendixline);
3136                 pain.line(ww - 2, y_offset,
3137                           ww - 2, y_offset + row_ptr->height(),
3138                           LColor::appendixline);
3139         }
3140
3141         // Draw depth lines
3142         Paragraph::depth_type const depth = firstpar->getDepth();
3143         if (depth > 0) {
3144                 Paragraph::depth_type next_depth = 0;
3145                 Paragraph::depth_type prev_depth = 0;
3146                 if (row_ptr->next())
3147                                 next_depth = row_ptr->next()->par()->getDepth();
3148                 if (row_ptr->previous())
3149                                 prev_depth = row_ptr->previous()->par()->getDepth();
3150
3151                 for (Paragraph::depth_type i = 1; i <= depth; ++i) {
3152                         int const line_x = (LYX_PAPER_MARGIN / 5) *
3153                                 i + box_x + x_offset;
3154                         pain.line(line_x, y_offset, line_x,
3155                                   y_offset + row_ptr->height() - 1 - (i - next_depth - 1) * 3,
3156                                   LColor::depthbar);
3157
3158                         if (i > prev_depth)
3159                                 pain.fillRectangle(line_x, y_offset, LYX_PAPER_MARGIN / 5, 2,
3160                                                    LColor::depthbar);
3161                         if (i > next_depth)
3162                                 pain.fillRectangle(line_x,
3163                                                    y_offset + row_ptr->height() - 2 - (i - next_depth - 1) * 3,
3164                                                    LYX_PAPER_MARGIN / 5, 2,
3165                                                    LColor::depthbar);
3166                 }
3167         }
3168
3169
3170         LyXLayout const & layout =
3171                 textclasslist.Style(bview->buffer()->params.textclass,
3172                                     row_ptr->par()->getLayout());
3173
3174         int y_top = 0;
3175         int y_bottom = row_ptr->height();
3176
3177         // is it a first row?
3178         if (!row_ptr->pos() && (row_ptr->par() == firstpar)) {
3179
3180                 // start of appendix?
3181                 if (row_ptr->par()->params().startOfAppendix()) {
3182                         pain.line(1, y_offset,
3183                                   ww - 2, y_offset,
3184                                   LColor::appendixline);
3185                 }
3186
3187                 // think about the margins
3188                 if (!row_ptr->previous() && bv_owner)
3189                         y_top += LYX_PAPER_MARGIN;
3190
3191                 // draw a top pagebreak
3192                 if (row_ptr->par()->params().pagebreakTop()) {
3193                         LyXFont pb_font;
3194                         pb_font.setColor(LColor::pagebreak).decSize();
3195                         int w = 0;
3196                         int a = 0;
3197                         int d = 0;
3198                         pain.line(0, y_offset + y_top + 2*defaultHeight(),
3199                                   ww,
3200                                   y_offset + y_top + 2 * defaultHeight(),
3201                                   LColor::pagebreak,
3202                                   Painter::line_onoffdash);
3203                         lyxfont::rectText(_("Page Break (top)"), pb_font,
3204                                           w, a, d);
3205                         pain.rectText((ww - w)/2,
3206                                       y_offset + y_top + 2 * defaultHeight() + d,
3207                                       _("Page Break (top)"),
3208                                       pb_font,
3209                                       backgroundColor(),
3210                                       backgroundColor());
3211                         y_top += 3 * defaultHeight();
3212                 }
3213
3214                 if (row_ptr->par()->params().spaceTop().kind() == VSpace::VFILL) {
3215                         // draw a vfill top
3216                         pain.line(0, y_offset + 2 + y_top,
3217                                   LYX_PAPER_MARGIN, y_offset + 2 + y_top,
3218                                   LColor::vfillline);
3219
3220                         pain.line(0, y_offset + y_top + 3 * defaultHeight(),
3221                                   LYX_PAPER_MARGIN,
3222                                   y_offset + y_top + 3 * defaultHeight(),
3223                                   LColor::vfillline);
3224
3225                         pain.line(LYX_PAPER_MARGIN / 2, y_offset + 2 + y_top,
3226                                   LYX_PAPER_MARGIN / 2,
3227                                   y_offset + y_top + 3 * defaultHeight(),
3228                                   LColor::vfillline);
3229
3230                         y_top += 3 * defaultHeight();
3231                 }
3232
3233                 // think about user added space
3234                 y_top += int(row_ptr->par()->params().spaceTop().inPixels(bview));
3235
3236                 // think about the parskip
3237                 // some parskips VERY EASY IMPLEMENTATION
3238                 if (bview->buffer()->params.paragraph_separation == BufferParams::PARSEP_SKIP) {
3239                         if (layout.latextype == LATEX_PARAGRAPH
3240                             && firstpar->getDepth() == 0
3241                             && firstpar->previous())
3242                                 y_top += bview->buffer()->params.getDefSkip().inPixels(bview);
3243                         else if (firstpar->previous()
3244                                  && textclasslist.Style(bview->buffer()->params.textclass,
3245                                                         firstpar->previous()->getLayout()).latextype == LATEX_PARAGRAPH
3246                                  && firstpar->previous()->getDepth() == 0)
3247                                 // is it right to use defskip here, too? (AS)
3248                                 y_top += bview->buffer()->params.getDefSkip().inPixels(bview);
3249                 }
3250
3251                 if (row_ptr->par()->params().lineTop()) {
3252                         // draw a top line
3253                         y_top +=  lyxfont::ascent('x',
3254                                                   getFont(bview->buffer(),
3255                                                           row_ptr->par(), 0));
3256                         int const w = (inset_owner ?
3257                                        inset_owner->width(bview, font) : ww);
3258                         int const xp = static_cast<int>(inset_owner ? x : 0);
3259                         pain.line(xp, y_offset + y_top,
3260                                   w, y_offset + y_top,
3261                                   LColor::topline,
3262                                   Painter::line_solid,
3263                                   Painter::line_thick);
3264
3265                         y_top +=  lyxfont::ascent('x',getFont(bview->buffer(),
3266                                                               row_ptr->par(), 0));
3267                 }
3268
3269                 // should we print a label?
3270                 if (layout.labeltype >= LABEL_STATIC
3271                     && (layout.labeltype != LABEL_STATIC
3272                         || layout.latextype != LATEX_ENVIRONMENT
3273                         || row_ptr->par()->isFirstInSequence())) {
3274                         font = getLabelFont(bview->buffer(), row_ptr->par());
3275                         if (!row_ptr->par()->getLabelstring().empty()) {
3276                                 tmpx = x;
3277                                 string const tmpstring =
3278                                         row_ptr->par()->getLabelstring();
3279
3280                                 if (layout.labeltype == LABEL_COUNTER_CHAPTER) {
3281                                         if (bview->buffer()->params.secnumdepth >= 0) {
3282                                                 // this is special code for
3283                                                 // the chapter layout. This is
3284                                                 // printed in an extra row
3285                                                 // and has a pagebreak at
3286                                                 // the top.
3287                                                 float spacing_val = 1.0;
3288                                                 if (!row_ptr->par()->params().spacing().isDefault()) {
3289                                                         spacing_val = row_ptr->par()->params().spacing().getValue();
3290                                                 } else {
3291                                                         spacing_val = bview->buffer()->params.spacing.getValue();
3292                                                 }
3293
3294                                                 maxdesc = int(lyxfont::maxDescent(font) * layout.spacing.getValue() * spacing_val)
3295                                                         + int(layout.parsep) * defaultHeight();
3296                                                 if (is_rtl)
3297                                                         tmpx = ww - leftMargin(bview, row_ptr) -
3298                                                                 lyxfont::width(tmpstring, font);
3299                                                 pain.text(int(tmpx),
3300                                                           y_offset + row_ptr->baseline() - row_ptr->ascent_of_text() - maxdesc,
3301                                                           tmpstring, font);
3302                                         }
3303                                 } else {
3304                                         if (is_rtl) {
3305                                                 tmpx = ww - leftMargin(bview, row_ptr)
3306                                                         + lyxfont::width(layout.labelsep, font);
3307                                         } else
3308                                                 tmpx = x - lyxfont::width(layout.labelsep, font)
3309                                                         - lyxfont::width(tmpstring, font);
3310
3311                                         // draw it!
3312                                         pain.text(int(tmpx),
3313                                                   y_offset + row_ptr->baseline(),
3314                                                   tmpstring, font);
3315                                 }
3316                         }
3317                         // the labels at the top of an environment.
3318                         // More or less for bibliography
3319                 } else if (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
3320                            layout.labeltype == LABEL_BIBLIO ||
3321                            layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
3322                         if (row_ptr->par()->isFirstInSequence()) {
3323                                 font = getLabelFont(bview->buffer(),
3324                                                     row_ptr->par());
3325                                 if (!row_ptr->par()->getLabelstring().empty()) {
3326                                         string const tmpstring =
3327                                                 row_ptr->par()->getLabelstring();
3328                                         float spacing_val = 1.0;
3329                                         if (!row_ptr->par()->params().spacing().isDefault()) {
3330                                                 spacing_val = row_ptr->par()->params().spacing().getValue();
3331                                         } else {
3332                                                 spacing_val = bview->buffer()->params.spacing.getValue();
3333                                         }
3334
3335                                         maxdesc = int(lyxfont::maxDescent(font) * layout.spacing.getValue() * spacing_val
3336                                                       + (layout.labelbottomsep * defaultHeight()));
3337
3338                                         tmpx = x;
3339                                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT){
3340                                                 tmpx = ( (is_rtl ? leftMargin(bview, row_ptr) : x)
3341                                                          + ww - rightMargin(bview->buffer(), row_ptr) ) / 2;
3342                                                 tmpx -= lyxfont::width(tmpstring, font) / 2;
3343                                         } else if (is_rtl)
3344                                                 tmpx = ww - leftMargin(bview, row_ptr) -
3345                                                         lyxfont::width(tmpstring, font);
3346                                         pain.text(int(tmpx),
3347                                                   y_offset + row_ptr->baseline()
3348                                                   - row_ptr->ascent_of_text()
3349                                                   - maxdesc,
3350                                                   tmpstring, font);
3351                                 }
3352                         }
3353                 }
3354                 if (layout.labeltype == LABEL_BIBLIO && row_ptr->par()->bibkey) {
3355                         font = getLayoutFont(bview->buffer(), row_ptr->par());
3356                         if (is_rtl)
3357                                 tmpx = ww - leftMargin(bview, row_ptr)
3358                                         + lyxfont::width(layout.labelsep, font);
3359                         else
3360                                 tmpx = x - lyxfont::width(layout.labelsep, font)
3361                                         - row_ptr->par()->bibkey->width(bview, font);
3362                         row_ptr->par()->bibkey->draw(bview, font,
3363                                                    y_offset + row_ptr->baseline(),
3364                                                    tmpx, clear_area);
3365                 }
3366         }
3367
3368         // is it a last row?
3369         Paragraph * par = row_ptr->par();
3370         if (row_ptr->par() == par
3371             && (!row_ptr->next() || row_ptr->next()->par() != row_ptr->par())) {
3372                 // think about the margins
3373                 if (!row_ptr->next() && bv_owner)
3374                         y_bottom -= LYX_PAPER_MARGIN;
3375
3376                 // draw a bottom pagebreak
3377                 if (firstpar->params().pagebreakBottom()) {
3378                         LyXFont pb_font;
3379                         pb_font.setColor(LColor::pagebreak).decSize();
3380                         int const y_place = y_offset + y_bottom
3381                                 - 2 * defaultHeight();
3382
3383                         int w = 0;
3384                         int a = 0;
3385                         int d = 0;
3386                         pain
3387                                 .line(0, y_place, ww, y_place,
3388                                       LColor::pagebreak,
3389                                       Painter::line_onoffdash);
3390                         lyxfont::rectText(_("Page Break (bottom)"), pb_font,
3391                                           w, a, d);
3392                         pain.rectText((ww - w) / 2, y_place + d,
3393                                       _("Page Break (bottom)"),
3394                                       pb_font,
3395                                       backgroundColor(),
3396                                       backgroundColor());
3397                         y_bottom -= 3 * defaultHeight();
3398                 }
3399
3400                 if (firstpar->params().spaceBottom().kind() == VSpace::VFILL) {
3401                         // draw a vfill bottom
3402                         int const y_place = y_offset + y_bottom
3403                                 - 3 * defaultHeight();
3404
3405                         pain.line(0, y_place,
3406                                   LYX_PAPER_MARGIN, y_place,
3407                                   LColor::vfillline);
3408                         pain.line(0, y_offset + y_bottom - 2,
3409                                   LYX_PAPER_MARGIN,
3410                                   y_offset + y_bottom - 2,
3411                                   LColor::vfillline);
3412                         pain.line(LYX_PAPER_MARGIN / 2,
3413                                   y_place,
3414                                   LYX_PAPER_MARGIN / 2,
3415                                   y_offset + y_bottom - 2,
3416                                   LColor::vfillline);
3417                         y_bottom -= 3 * defaultHeight();
3418                 }
3419
3420                 // think about user added space
3421                 y_bottom -= int(firstpar->params().spaceBottom().inPixels(bview));
3422
3423                 if (firstpar->params().lineBottom()) {
3424                         // draw a bottom line
3425                         y_bottom -= lyxfont::ascent('x',
3426                                                     getFont(bview->buffer(),
3427                                                             par,
3428                                                             max(Paragraph::size_type(0), par->size() - 1)));
3429                         int const w = (inset_owner ?
3430                                        inset_owner->width(bview, font) : ww);
3431                         int const xp = static_cast<int>(inset_owner ? x : 0);
3432                         pain.line(xp, y_offset + y_bottom,
3433                                   w, y_offset + y_bottom,
3434                                   LColor::topline, Painter::line_solid,
3435                                   Painter::line_thick);
3436                         y_bottom -= lyxfont::ascent('x',
3437                                                     getFont(bview->buffer(),
3438                                                             par,
3439                                                             max(Paragraph::size_type(0), par->size() - 1)));
3440                 }
3441
3442                 // draw an endlabel
3443                 int const endlabel =
3444                         row_ptr->par()->getEndLabel(bview->buffer()->params);
3445                 switch (endlabel) {
3446                 case END_LABEL_BOX:
3447                 case END_LABEL_FILLED_BOX:
3448                 {
3449                         LyXFont const font = getFont(bview->buffer(),
3450                                                      row_ptr->par(), last);
3451                         int const size = int(0.75 * lyxfont::maxAscent(font));
3452                         int const y = (y_offset + row_ptr->baseline()) - size;
3453                         int x = is_rtl ? LYX_PAPER_MARGIN
3454                                 : ww - LYX_PAPER_MARGIN - size;
3455
3456                         if (row_ptr->fill() <= size)
3457                                 x += (size - row_ptr->fill() + 1) * (is_rtl ? -1 : 1);
3458                         if (endlabel == END_LABEL_BOX) {
3459                                 pain.line(x, y, x, y + size,
3460                                           LColor::eolmarker);
3461                                 pain.line(x + size, y, x + size , y + size,
3462                                           LColor::eolmarker);
3463                                 pain.line(x, y, x + size, y,
3464                                           LColor::eolmarker);
3465                                 pain.line(x, y + size, x + size, y + size,
3466                                           LColor::eolmarker);
3467                         } else
3468                                 pain.fillRectangle(x, y, size, size,
3469                                                    LColor::eolmarker);
3470                         break;
3471                 }
3472                 case END_LABEL_STATIC:
3473                 {
3474                         LyXTextClass::LayoutList::size_type layout = row_ptr->par()->getLayout();
3475                         string const tmpstring = textclasslist.
3476                                 Style(bview->buffer()->params.textclass,
3477                                       layout).endlabelstring();
3478                         font = getLabelFont(bview->buffer(), row_ptr->par());
3479                         int const tmpx = is_rtl ?
3480                                 int(x) - lyxfont::width(tmpstring, font)
3481                                 : ww - rightMargin(bview->buffer(), row_ptr) - row_ptr->fill();
3482                         pain.text( tmpx, y_offset + row_ptr->baseline(), tmpstring, font);
3483                         break;
3484                 }
3485                 case END_LABEL_NO_LABEL:
3486                         break;
3487                 }
3488         }
3489
3490         // draw the text in the pixmap
3491
3492         vpos = row_ptr->pos();
3493
3494         Paragraph::size_type main_body =
3495                 beginningOfMainBody(bview->buffer(), row_ptr->par());
3496         if (main_body > 0 &&
3497             (main_body-1 > last ||
3498              !row_ptr->par()->isLineSeparator(main_body - 1)))
3499                 main_body = 0;
3500
3501         while (vpos <= last)  {
3502                 pos = vis2log(vpos);
3503                 if (main_body > 0 && pos == main_body - 1) {
3504                         x += fill_label_hfill
3505                                 + lyxfont::width(layout.labelsep,
3506                                                  getLabelFont(bview->buffer(),
3507                                                               row_ptr->par()))
3508                                 - singleWidth(bview,
3509                                               row_ptr->par(),
3510                                               main_body - 1);
3511                 }
3512
3513                 if (row_ptr->par() ->isHfill(pos)) {
3514                         x += 1;
3515                         pain.line(int(x),
3516                                   y_offset + row_ptr->baseline() - defaultHeight() / 2,
3517                                   int(x),
3518                                   y_offset + row_ptr->baseline(),
3519                                   LColor::vfillline);
3520
3521                         if (hfillExpansion(bview->buffer(),
3522                                            row_ptr, pos)) {
3523                                 if (pos >= main_body) {
3524                                         pain.line(int(x),
3525                                                   y_offset + row_ptr->baseline() - defaultHeight() / 4,
3526                                                   int(x + fill_hfill),
3527                                                   y_offset + row_ptr->baseline() - defaultHeight() / 4,
3528                                                   LColor::vfillline,
3529                                                   Painter::line_onoffdash);
3530                                         x += fill_hfill;
3531                                 } else {
3532                                         pain.line(int(x),
3533                                                   y_offset + row_ptr->baseline() - defaultHeight() / 4,
3534                                                   int(x + fill_label_hfill),
3535                                                   y_offset + row_ptr->baseline() - defaultHeight() / 4,
3536                                                   LColor::vfillline,
3537                                                   Painter::line_onoffdash);
3538
3539                                         x += fill_label_hfill;
3540                                 }
3541                                 pain.line(int(x),
3542                                           y_offset + row_ptr->baseline() - defaultHeight() / 2,
3543                                           int(x),
3544                                           y_offset + row_ptr->baseline(),
3545                                           LColor::vfillline);
3546                         }
3547                         x += 2;
3548                         ++vpos;
3549                 } else if (row_ptr->par()->isSeparator(pos)) {
3550                         x += singleWidth(bview,
3551                                          row_ptr->par(), pos);
3552                         if (pos >= main_body)
3553                                 x += fill_separator;
3554                         ++vpos;
3555                 } else
3556                         draw(bview, row_ptr, vpos, y_offset, x, clear_area);
3557         }
3558 }
3559
3560
3561 int LyXText::defaultHeight() const
3562 {
3563         LyXFont font(LyXFont::ALL_SANE);
3564         return int(lyxfont::maxAscent(font) + lyxfont::maxDescent(font) * 1.5);
3565 }
3566
3567
3568 /* returns the column near the specified x-coordinate of the row
3569 * x is set to the real beginning of this column  */
3570 int LyXText::getColumnNearX(BufferView * bview, Row * row, int & x,
3571                             bool & boundary) const
3572 {
3573         float tmpx = 0.0;
3574         float fill_separator;
3575         float fill_hfill;
3576         float fill_label_hfill;
3577
3578         prepareToPrint(bview, row, tmpx, fill_separator,
3579                        fill_hfill, fill_label_hfill);
3580
3581         Paragraph::size_type vc = row->pos();
3582         Paragraph::size_type last = rowLastPrintable(row);
3583         Paragraph::size_type c = 0;
3584         LyXLayout const & layout =
3585                 textclasslist.Style(bview->buffer()->params.textclass,
3586                                     row->par()->getLayout());
3587         bool left_side = false;
3588
3589         Paragraph::size_type
3590                 main_body = beginningOfMainBody(bview->buffer(), row->par());
3591         float last_tmpx = tmpx;
3592
3593         if (main_body > 0 &&
3594             (main_body - 1 > last ||
3595              !row->par()->isLineSeparator(main_body - 1)))
3596                 main_body = 0;
3597
3598         while (vc <= last && tmpx <= x) {
3599                 c = vis2log(vc);
3600                 last_tmpx = tmpx;
3601                 if (main_body > 0 && c == main_body-1) {
3602                         tmpx += fill_label_hfill +
3603                                 lyxfont::width(layout.labelsep,
3604                                                getLabelFont(bview->buffer(), row->par()));
3605                         if (row->par()->isLineSeparator(main_body - 1))
3606                                 tmpx -= singleWidth(bview, row->par(), main_body-1);
3607                 }
3608
3609                 if (hfillExpansion(bview->buffer(), row, c)) {
3610                         x += singleWidth(bview, row->par(), c);
3611                         if (c >= main_body)
3612                                 tmpx += fill_hfill;
3613                         else
3614                                 tmpx += fill_label_hfill;
3615                 }
3616                 else if (row->par()->isSeparator(c)) {
3617                         tmpx += singleWidth(bview, row->par(), c);
3618                         if (c >= main_body)
3619                                 tmpx+= fill_separator;
3620                 } else
3621                         tmpx += singleWidth(bview, row->par(), c);
3622                 ++vc;
3623         }
3624
3625         if ((tmpx + last_tmpx) / 2 > x) {
3626                 tmpx = last_tmpx;
3627                 left_side = true;
3628         }
3629
3630         if (vc > last + 1)  // This shouldn't happen.
3631                 vc = last + 1;
3632
3633         boundary = false;
3634         bool const lastrow = lyxrc.rtl_support // This is not needed, but gives
3635                                          // some speedup if rtl_support=false
3636                 && (!row->next() || row->next()->par() != row->par());
3637         bool const rtl = (lastrow)
3638                 ? row->par()->isRightToLeftPar(bview->buffer()->params)
3639                 : false; // If lastrow is false, we don't need to compute
3640                          // the value of rtl.
3641
3642         if (row->pos() > last)  // Row is empty?
3643                 c = row->pos();
3644         else if (lastrow &&
3645                  ( ( rtl &&  left_side && vc == row->pos() && x < tmpx - 5) ||
3646                    (!rtl && !left_side && vc == last + 1   && x > tmpx + 5) ))
3647                 c = last + 1;
3648         else if (vc == row->pos()) {
3649                 c = vis2log(vc);
3650                 if (bidi_level(c) % 2 == 1)
3651                         ++c;
3652         } else {
3653                 c = vis2log(vc - 1);
3654                 bool const rtl = (bidi_level(c) % 2 == 1);
3655                 if (left_side == rtl) {
3656                         ++c;
3657                         boundary = isBoundary(bview->buffer(), row->par(), c);
3658                 }
3659         }
3660
3661         if (row->pos() <= last && c > last
3662             && row->par()->isNewline(last)) {
3663                 if (bidi_level(last) % 2 == 0)
3664                         tmpx -= singleWidth(bview, row->par(), last);
3665                 else
3666                         tmpx += singleWidth(bview, row->par(), last);
3667                 c = last;
3668         }
3669
3670         c -= row->pos();
3671         x = int(tmpx);
3672         return c;
3673 }
3674
3675
3676 // returns pointer to a specified row
3677 Row * LyXText::getRow(Paragraph * par,
3678                       Paragraph::size_type pos, int & y) const
3679 {
3680         if (!firstrow)
3681                 return 0;
3682
3683         Row * tmprow = firstrow;
3684         y = 0;
3685
3686         // find the first row of the specified paragraph
3687         while (tmprow->next() && tmprow->par() != par) {
3688                 y += tmprow->height();
3689                 tmprow = tmprow->next();
3690         }
3691
3692         // now find the wanted row
3693         while (tmprow->pos() < pos
3694                && tmprow->next()
3695                && tmprow->next()->par() == par
3696                && tmprow->next()->pos() <= pos) {
3697                 y += tmprow->height();
3698                 tmprow = tmprow->next();
3699         }
3700
3701         return tmprow;
3702 }