src/text.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *           Copyright 1995 Matthias Ettrich
   7  *           Copyright 1995-2001 The LyX Team.
   8  *
   9  * ====================================================== */
  10
  11 #include <config.h>
  12
  13 #include "lyxtext.h"
  14 #include "lyxrow.h"
  15 #include "lyxtextclasslist.h"
  16 #include "paragraph.h"
  17 #include "lyx_gui_misc.h"
  18 #include "gettext.h"
  19 #include "bufferparams.h"
  20 #include "buffer.h"
  21 #include "debug.h"
  22 #include "lyxrc.h"
  23 #include "LyXView.h"
  24 #include "Painter.h"
  25 #include "tracer.h"
  26 #include "font.h"
  27 #include "encoding.h"
  28 #include "lyxscreen.h"
  29 #include "bufferview_funcs.h"
  30 #include "BufferView.h"
  31 #include "language.h"
  32 #include "ParagraphParameters.h"
  33 #include "undo_funcs.h"
  34 #include "font.h"
  35
  36 #include "insets/insetbib.h"
  37 #include "insets/insettext.h"
  38
  39 #include "support/textutils.h"
  40 #include "support/LAssert.h"
  41 #include "support/lstrings.h"
  42
  43 #include <algorithm>
  44
  45 using std::max;
  46 using std::min;
  47 using std::endl;
  48 using std::pair;
  49 using lyx::pos_type;
  50
  51 namespace {
  52
  53 int const LYX_PAPER_MARGIN = 20;
  54
  55 } // namespace anon
  56
  57 extern int bibitemMaxWidth(BufferView *, LyXFont const &);
  58
  59
  60 int LyXText::workWidth(BufferView * bview) const
  61 {
  62         if (inset_owner) {
  63                 return inset_owner->textWidth(bview);
  64         }
  65         return bview->workWidth();
  66 }
  67
  68
  69 int LyXText::workWidth(BufferView * bview, Inset * inset) const
  70 {
  71         Paragraph * par = 0;
  72         pos_type pos = -1;
  73
  74         par = inset->parOwner();
  75         if (par)
  76                 pos = par->getPositionOfInset(inset);
  77
  78         if (!par || pos == -1) {
  79                 lyxerr << "LyXText::workWidth: something is wrong,"
  80                         " fall back to the brute force method" << endl;
  81                 Buffer::inset_iterator it = bview->buffer()->inset_iterator_begin();
  82                 Buffer::inset_iterator end = bview->buffer()->inset_iterator_end();
  83                 for ( ; it != end; ++it) {
  84                         if (*it == inset) {
  85                                 par = it.getPar();
  86                                 pos = it.getPos();
  87                                 break;
  88                         }
  89                 }
  90         }
  91
  92         if (!par) {
  93                 return workWidth(bview);
  94         }
  95
  96         LyXLayout const & layout =
  97                 textclasslist.Style(bview->buffer()->params.textclass,
  98                                     par->getLayout());
  99
 100         if (layout.margintype != MARGIN_RIGHT_ADDRESS_BOX) {
 101                 // Optimization here: in most cases, the real row is
 102                 // not needed, but only the par/pos values. So we just
 103                 // construct a dummy row for leftMargin. (JMarc)
 104                 Row dummyrow;
 105                 dummyrow.par(par);
 106                 dummyrow.pos(pos);
 107                 return workWidth(bview) - leftMargin(bview, &dummyrow);
 108         } else {
 109                 int dummy_y;
 110                 Row * row = getRow(par, pos, dummy_y);
 111                 Row * frow = row;
 112                 while (frow->previous() && frow->par() == frow->previous()->par())
 113                         frow = frow->previous();
 114                 unsigned int maxw = 0;
 115                 while (frow->next() && frow->par() == frow->next()->par()) {
 116                         if ((frow != row) && (maxw < frow->width()))
 117                                 maxw = frow->width();
 118                         frow = frow->next();
 119                 }
 120                 if (maxw)
 121                         return maxw;
 122         }
 123         return workWidth(bview);
 124 }
 125
 126
 127 int LyXText::getRealCursorX(BufferView * bview) const
 128 {
 129         int x = cursor.x();
 130         if (the_locking_inset && (the_locking_inset->getLyXText(bview)!=this))
 131                 x = the_locking_inset->getLyXText(bview)->getRealCursorX(bview);
 132         return x;
 133 }
 134
 135
 136 unsigned char LyXText::transformChar(unsigned char c, Paragraph * par,
 137                         pos_type pos) const
 138 {
 139         if (!Encodings::is_arabic(c))
 140                 if (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 && IsDigit(c))
 141                         return c + (0xb0 - '0');
 142                 else
 143                         return c;
 144
 145         unsigned char const prev_char = pos > 0 ? par->getChar(pos-1) : ' ';
 146         unsigned char next_char = ' ';
 147
 148         for (pos_type i = pos+1; i < par->size(); ++i)
 149                 if (!Encodings::IsComposeChar_arabic(par->getChar(i))) {
 150                         next_char = par->getChar(i);
 151                         break;
 152                 }
 153
 154         if (Encodings::is_arabic(next_char)) {
 155                 if (Encodings::is_arabic(prev_char))
 156                         return Encodings::TransformChar(c, Encodings::FORM_MEDIAL);
 157                 else
 158                         return Encodings::TransformChar(c, Encodings::FORM_INITIAL);
 159         } else {
 160                 if (Encodings::is_arabic(prev_char))
 161                         return Encodings::TransformChar(c, Encodings::FORM_FINAL);
 162                 else
 163                         return Encodings::TransformChar(c, Encodings::FORM_ISOLATED);
 164         }
 165 }
 166
 167 // This is the comments that some of the warnings below refers to.
 168 // There are some issues in this file and I don't think they are
 169 // really related to the FIX_DOUBLE_SPACE patch. I'd rather think that
 170 // this is a problem that has been here almost from day one and that a
 171 // larger userbase with differenct access patters triggers the bad
 172 // behaviour. (segfaults.) What I think happen is: In several places
 173 // we store the paragraph in the current cursor and then moves the
 174 // cursor. This movement of the cursor will delete paragraph at the
 175 // old position if it is now empty. This will make the temporary
 176 // pointer to the old cursor paragraph invalid and dangerous to use.
 177 // And is some cases this will trigger a segfault. I have marked some
 178 // of the cases where this happens with a warning, but I am sure there
 179 // are others in this file and in text2.C. There is also a note in
 180 // Delete() that you should read. In Delete I store the paragraph->id
 181 // instead of a pointer to the paragraph. I am pretty sure this faulty
 182 // use of temporary pointers to paragraphs that might have gotten
 183 // invalidated (through a cursor movement) before they are used, are
 184 // the cause of the strange crashes we get reported often.
 185 //
 186 // It is very tiresom to change this code, especially when it is as
 187 // hard to read as it is. Help to fix all the cases where this is done
 188 // would be greately appreciated.
 189 //
 190 // Lgb
 191
 192 int LyXText::singleWidth(BufferView * bview, Paragraph * par,
 193                          pos_type pos) const
 194 {
 195         char const c = par->getChar(pos);
 196         return singleWidth(bview, par, pos, c);
 197 }
 198
 199
 200 int LyXText::singleWidth(BufferView * bview, Paragraph * par,
 201                          pos_type pos, char c) const
 202 {
 203         LyXFont const font = getFont(bview->buffer(), par, pos);
 204
 205         // The most common case is handled first (Asger)
 206         if (IsPrintable(c)) {
 207                 if (font.language()->RightToLeft()) {
 208                         if (font.language()->lang() == "arabic" &&
 209                             (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 210                              lyxrc.font_norm_type == LyXRC::ISO_10646_1))
 211                                 if (Encodings::IsComposeChar_arabic(c))
 212                                         return 0;
 213                                 else
 214                                         c = transformChar(c, par, pos);
 215                         else if (font.language()->lang() == "hebrew" &&
 216                                  Encodings::IsComposeChar_hebrew(c))
 217                                 return 0;
 218                 }
 219                 return lyxfont::width(c, font);
 220
 221         } else if (IsHfillChar(c)) {
 222                 return 3;       /* Because of the representation
 223                                  * as vertical lines */
 224         } else if (c == Paragraph::META_INSET) {
 225                 Inset * tmpinset = par->getInset(pos);
 226                 if (tmpinset) {
 227 #if 1
 228                         // this IS needed otherwise on initialitation we don't get the fill
 229                         // of the row right (ONLY on initialization if we read a file!)
 230                         // should be changed! (Jug 20011204)
 231                         tmpinset->update(bview, font);
 232 #endif
 233                         return tmpinset->width(bview, font);
 234                 } else
 235                         return 0;
 236
 237         } else if (IsSeparatorChar(c))
 238                 c = ' ';
 239         else if (IsNewlineChar(c))
 240                 c = 'n';
 241         return lyxfont::width(c, font);
 242 }
 243
 244
 245 // Returns the paragraph position of the last character in the specified row
 246 pos_type LyXText::rowLast(Row const * row) const
 247 {
 248         if (!row->next() || row->next()->par() != row->par()) {
 249                 return row->par()->size() - 1;
 250         } else {
 251                 return row->next()->pos() - 1;
 252         }
 253 }
 254
 255
 256 pos_type LyXText::rowLastPrintable(Row const * row) const
 257 {
 258         pos_type const last = rowLast(row);
 259         if (last >= row->pos()
 260             && row->next()
 261             && row->next()->par() == row->par()
 262             && row->par()->isSeparator(last))
 263                 return last - 1;
 264         else
 265                 return last;
 266 }
 267
 268
 269 void LyXText::computeBidiTables(Buffer const * buf, Row * row) const
 270 {
 271         bidi_same_direction = true;
 272         if (!lyxrc.rtl_support) {
 273                 bidi_start = -1;
 274                 return;
 275         }
 276
 277         bidi_start = row->pos();
 278         bidi_end = rowLastPrintable(row);
 279
 280         if (bidi_start > bidi_end) {
 281                 bidi_start = -1;
 282                 return;
 283         }
 284
 285         if (bidi_end + 2 - bidi_start >
 286             static_cast<pos_type>(log2vis_list.size())) {
 287                 pos_type new_size =
 288                         (bidi_end + 2 - bidi_start < 500) ?
 289                         500 : 2 * (bidi_end + 2 - bidi_start);
 290                 log2vis_list.resize(new_size);
 291                 vis2log_list.resize(new_size);
 292                 bidi_levels.resize(new_size);
 293         }
 294
 295         vis2log_list[bidi_end + 1 - bidi_start] = -1;
 296         log2vis_list[bidi_end + 1 - bidi_start] = -1;
 297
 298         pos_type stack[2];
 299         bool const rtl_par =
 300                 row->par()->getParLanguage(buf->params)->RightToLeft();
 301         int level = 0;
 302         bool rtl = false;
 303         bool rtl0 = false;
 304         pos_type const main_body = beginningOfMainBody(buf, row->par());
 305
 306         for (pos_type lpos = bidi_start;
 307              lpos <= bidi_end; ++lpos) {
 308                 bool is_space = row->par()->isLineSeparator(lpos);
 309                 pos_type const pos =
 310                         (is_space && lpos + 1 <= bidi_end &&
 311                          !row->par()->isLineSeparator(lpos + 1) &&
 312                          !row->par()->isNewline(lpos + 1))
 313                         ? lpos + 1 : lpos;
 314                 LyXFont font = row->par()->getFontSettings(buf->params, pos);
 315                 if (pos != lpos && 0 < lpos && rtl0 && font.isRightToLeft() &&
 316                     font.number() == LyXFont::ON &&
 317                     row->par()->getFontSettings(buf->params, lpos - 1).number()
 318                     == LyXFont::ON) {
 319                         font = row->par()->getFontSettings(buf->params, lpos);
 320                         is_space = false;
 321                 }
 322
 323
 324                 bool new_rtl = font.isVisibleRightToLeft();
 325                 bool new_rtl0 = font.isRightToLeft();
 326                 int new_level;
 327
 328                 if (lpos == main_body - 1
 329                     && row->pos() < main_body - 1
 330                     && is_space) {
 331                         new_level = (rtl_par) ? 1 : 0;
 332                         new_rtl = new_rtl0 = rtl_par;
 333                 } else if (new_rtl0)
 334                         new_level = (new_rtl) ? 1 : 2;
 335                 else
 336                         new_level = (rtl_par) ? 2 : 0;
 337
 338                 if (is_space && new_level >= level) {
 339                         new_level = level;
 340                         new_rtl = rtl;
 341                         new_rtl0 = rtl0;
 342                 }
 343
 344                 int new_level2 = new_level;
 345
 346                 if (level == new_level && rtl0 != new_rtl0) {
 347                         --new_level2;
 348                         log2vis_list[lpos - bidi_start] = (rtl) ? 1 : -1;
 349                 } else if (level < new_level) {
 350                         log2vis_list[lpos - bidi_start] =  (rtl) ? -1 : 1;
 351                         if (new_level > rtl_par)
 352                                 bidi_same_direction = false;
 353                 } else
 354                         log2vis_list[lpos - bidi_start] = (new_rtl) ? -1 : 1;
 355                 rtl = new_rtl;
 356                 rtl0 = new_rtl0;
 357                 bidi_levels[lpos - bidi_start] = new_level;
 358
 359                 while (level > new_level2) {
 360                         pos_type old_lpos = stack[--level];
 361                         int delta = lpos - old_lpos - 1;
 362                         if (level % 2)
 363                                 delta = -delta;
 364                         log2vis_list[lpos - bidi_start] += delta;
 365                         log2vis_list[old_lpos - bidi_start] += delta;
 366                 }
 367                 while (level < new_level)
 368                         stack[level++] = lpos;
 369         }
 370
 371         while (level > 0) {
 372                 pos_type const old_lpos = stack[--level];
 373                 int delta = bidi_end - old_lpos;
 374                 if (level % 2)
 375                         delta = -delta;
 376                 log2vis_list[old_lpos - bidi_start] += delta;
 377         }
 378
 379         pos_type vpos = bidi_start - 1;
 380         for (pos_type lpos = bidi_start;
 381              lpos <= bidi_end; ++lpos) {
 382                 vpos += log2vis_list[lpos - bidi_start];
 383                 vis2log_list[vpos - bidi_start] = lpos;
 384                 log2vis_list[lpos - bidi_start] = vpos;
 385         }
 386 }
 387
 388
 389 // This method requires a previous call to ComputeBidiTables()
 390 bool LyXText::isBoundary(Buffer const * buf, Paragraph * par,
 391                          pos_type pos) const
 392 {
 393         if (!lyxrc.rtl_support || pos == 0)
 394                 return false;
 395
 396         if (!bidi_InRange(pos - 1)) {
 397                 /// This can happen if pos is the first char of a row.
 398                 /// Returning false in this case is incorrect!
 399                 return false;
 400         }
 401
 402         bool const rtl = bidi_level(pos - 1) % 2;
 403         bool const rtl2 = bidi_InRange(pos)
 404                 ? bidi_level(pos) % 2
 405                 : par->isRightToLeftPar(buf->params);
 406         return rtl != rtl2;
 407 }
 408
 409
 410 bool LyXText::isBoundary(Buffer const * buf, Paragraph * par,
 411                          pos_type pos, LyXFont const & font) const
 412 {
 413         if (!lyxrc.rtl_support)
 414                 return false;    // This is just for speedup
 415
 416         bool const rtl = font.isVisibleRightToLeft();
 417         bool const rtl2 = bidi_InRange(pos)
 418                 ? bidi_level(pos) % 2
 419                 : par->isRightToLeftPar(buf->params);
 420         return rtl != rtl2;
 421 }
 422
 423 void LyXText::drawNewline(DrawRowParams & p, pos_type const pos)
 424 {
 425         // Draw end-of-line marker
 426         LyXFont const font = getFont(p.bv->buffer(), p.row->par(), pos);
 427         int const wid = lyxfont::width('n', font);
 428         int const asc = lyxfont::maxAscent(font);
 429         int const y = p.yo + p.row->baseline();
 430         int xp[3];
 431         int yp[3];
 432
 433         yp[0] = int(y - 0.875 * asc * 0.75);
 434         yp[1] = int(y - 0.500 * asc * 0.75);
 435         yp[2] = int(y - 0.125 * asc * 0.75);
 436
 437         if (bidi_level(pos) % 2 == 0) {
 438                 xp[0] = int(p.x + wid * 0.375);
 439                 xp[1] = int(p.x);
 440                 xp[2] = int(p.x + wid * 0.375);
 441         } else {
 442                 xp[0] = int(p.x + wid * 0.625);
 443                 xp[1] = int(p.x + wid);
 444                 xp[2] = int(p.x + wid * 0.625);
 445         }
 446
 447         p.pain->lines(xp, yp, 3, LColor::eolmarker);
 448
 449         yp[0] = int(y - 0.500 * asc * 0.75);
 450         yp[1] = int(y - 0.500 * asc * 0.75);
 451         yp[2] = int(y - asc * 0.75);
 452
 453         if (bidi_level(pos) % 2 == 0) {
 454                 xp[0] = int(p.x);
 455                 xp[1] = int(p.x + wid);
 456                 xp[2] = int(p.x + wid);
 457         } else {
 458                 xp[0] = int(p.x + wid);
 459                 xp[1] = int(p.x);
 460                 xp[2] = int(p.x);
 461         }
 462
 463         p.pain->lines(xp, yp, 3, LColor::eolmarker);
 464
 465         p.x += wid;
 466 }
 467
 468
 469 void LyXText::drawInset(DrawRowParams & p, pos_type const pos)
 470 {
 471         Inset * inset = p.row->par()->getInset(pos);
 472
 473         // FIXME: shouldn't happen
 474         if (!inset) {
 475                 return;
 476         }
 477
 478         LyXFont const & font = getFont(p.bv->buffer(), p.row->par(), pos);
 479
 480         inset->update(p.bv, font, false);
 481         inset->draw(p.bv, font, p.yo + p.row->baseline(), p.x, p.cleared);
 482
 483         if (!need_break_row && !inset_owner
 484                 && p.bv->text->status() == CHANGED_IN_DRAW) {
 485                 Row * prev = p.row->previous();
 486                 if (prev && prev->par() == p.row->par()) {
 487                         breakAgainOneRow(p.bv, prev);
 488                 }
 489                 setCursor(p.bv, cursor.par(), cursor.pos());
 490                 need_break_row = p.row;
 491         }
 492 }
 493
 494
 495 void LyXText::drawForeignMark(DrawRowParams & p, float const orig_x, LyXFont const & orig_font)
 496 {
 497         if (!lyxrc.mark_foreign_language)
 498                 return;
 499         if (orig_font.language() == latex_language)
 500                 return;
 501         if (orig_font.language() == p.bv->buffer()->params.language)
 502                 return;
 503
 504         int const y = p.yo + p.row->height() - 1;
 505         p.pain->line(int(orig_x), y, int(p.x), y, LColor::language);
 506 }
 507
 508
 509 void LyXText::drawHebrewComposeChar(DrawRowParams & p, pos_type & vpos)
 510 {
 511         pos_type pos = vis2log(vpos);
 512
 513         string str;
 514
 515         // first char
 516         char c = p.row->par()->getChar(pos);
 517         str += c;
 518         ++vpos;
 519
 520         LyXFont const & font = getFont(p.bv->buffer(), p.row->par(), pos);
 521         int const width = lyxfont::width(c, font);
 522         int dx = 0;
 523
 524         for (pos_type i = pos-1; i >= 0; --i) {
 525                 c = p.row->par()->getChar(i);
 526                 if (!Encodings::IsComposeChar_hebrew(c)) {
 527                         if (IsPrintableNonspace(c)) {
 528                                 int const width2 =
 529                                         singleWidth(p.bv, p.row->par(), i, c);
 530                                 // dalet / resh
 531                                 dx = (c == 'ø' || c == 'ã')
 532                                         ? width2 - width
 533                                         : (width2 - width) / 2;
 534                         }
 535                         break;
 536                 }
 537         }
 538
 539         // Draw nikud
 540         p.pain->text(int(p.x) + dx, p.yo + p.row->baseline(), str, font);
 541 }
 542
 543
 544 void LyXText::drawArabicComposeChar(DrawRowParams & p, pos_type & vpos)
 545 {
 546         pos_type pos = vis2log(vpos);
 547         string str;
 548
 549         // first char
 550         char c = p.row->par()->getChar(pos);
 551         c = transformChar(c, p.row->par(), pos);
 552         str +=c;
 553         ++vpos;
 554
 555         LyXFont const & font = getFont(p.bv->buffer(), p.row->par(), pos);
 556         int const width = lyxfont::width(c, font);
 557         int dx = 0;
 558
 559         for (pos_type i = pos-1; i >= 0; --i) {
 560                 c = p.row->par()->getChar(i);
 561                 if (!Encodings::IsComposeChar_arabic(c)) {
 562                         if (IsPrintableNonspace(c)) {
 563                                 int const width2 =
 564                                         singleWidth(p.bv, p.row->par(), i, c);
 565                                 dx = (width2 - width) / 2;
 566                         }
 567                         break;
 568                 }
 569         }
 570         // Draw nikud
 571         p.pain->text(int(p.x) + dx, p.yo + p.row->baseline(), str, font);
 572 }
 573
 574
 575 void LyXText::drawChars(DrawRowParams & p, pos_type & vpos,
 576         bool hebrew, bool arabic)
 577 {
 578         pos_type pos = vis2log(vpos);
 579         pos_type const last = rowLastPrintable(p.row);
 580         LyXFont const & orig_font = getFont(p.bv->buffer(), p.row->par(), pos);
 581
 582         // first character
 583         string str;
 584         str += p.row->par()->getChar(pos);
 585         if (arabic) {
 586                 unsigned char c = str[0];
 587                 str[0] = transformChar(c, p.row->par(), pos);
 588         }
 589         ++vpos;
 590
 591         // collect as much similar chars as we can
 592         while (vpos <= last && (pos = vis2log(vpos)) >= 0) {
 593                 char c = p.row->par()->getChar(pos);
 594
 595                 if (!IsPrintableNonspace(c))
 596                         break;
 597
 598                 if (arabic && Encodings::IsComposeChar_arabic(c))
 599                         break;
 600                 if (hebrew && Encodings::IsComposeChar_hebrew(c))
 601                         break;
 602
 603                 if (orig_font != getFont(p.bv->buffer(), p.row->par(), pos))
 604                         break;
 605
 606                 str += c;
 607                 ++vpos;
 608         }
 609
 610         // Draw text and set the new x position
 611         p.pain->text(int(p.x), p.yo + p.row->baseline(), str, orig_font);
 612         p.x += lyxfont::width(str, orig_font);
 613 }
 614
 615
 616 void LyXText::draw(DrawRowParams & p, pos_type & vpos)
 617 {
 618         pos_type const pos = vis2log(vpos);
 619         Paragraph * par = p.row->par();
 620
 621         LyXFont const & orig_font = getFont(p.bv->buffer(), par, pos);
 622
 623         float const orig_x = p.x;
 624
 625         char const c = par->getChar(pos);
 626
 627         if (IsNewlineChar(c)) {
 628                 ++vpos;
 629                 drawNewline(p, pos);
 630                 return;
 631         } else if (IsInsetChar(c)) {
 632                 drawInset(p, pos);
 633                 ++vpos;
 634                 drawForeignMark(p, orig_x, orig_font);
 635                 return;
 636         }
 637
 638         // usual characters, no insets
 639
 640         // special case languages
 641         bool const hebrew = (orig_font.language()->lang() == "hebrew");
 642         bool const arabic =
 643                 orig_font.language()->lang() == "arabic" &&
 644                 (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 645                 lyxrc.font_norm_type == LyXRC::ISO_10646_1);
 646
 647         // draw as many chars as we can
 648         if ((!hebrew && !arabic)
 649                 || (hebrew && !Encodings::IsComposeChar_hebrew(c))
 650                 || (arabic && !Encodings::IsComposeChar_arabic(c))) {
 651                 drawChars(p, vpos, true, false);
 652         } else if (hebrew) {
 653                 drawHebrewComposeChar(p, vpos);
 654         } else if (arabic) {
 655                 drawArabicComposeChar(p, vpos);
 656         }
 657
 658         drawForeignMark(p, orig_x, orig_font);
 659
 660 #ifdef INHERIT_LANGUAGE
 661 #ifdef WITH_WARNINGS
 662         if ((font.language() == inherit_language) ||
 663                 (font.language() == ignore_language))
 664                 lyxerr << "No this shouldn't happen!\n";
 665 #endif
 666 #endif
 667 }
 668
 669
 670 // Returns the left beginning of the text.
 671 // This information cannot be taken from the layouts-objekt, because in
 672 // LaTeX the beginning of the text fits in some cases (for example sections)
 673 // exactly the label-width.
 674 int LyXText::leftMargin(BufferView * bview, Row const * row) const
 675 {
 676         LyXTextClass const & tclass =
 677                 textclasslist.TextClass(bview->buffer()->params.textclass);
 678         LyXLayout const & layout = tclass[row->par()->getLayout()];
 679
 680         string parindent = layout.parindent;
 681
 682         int x = LYX_PAPER_MARGIN;
 683
 684         x += lyxfont::signedWidth(tclass.leftmargin(), tclass.defaultfont());
 685
 686         // this is the way, LyX handles the LaTeX-Environments.
 687         // I have had this idea very late, so it seems to be a
 688         // later added hack and this is true
 689         if (!row->par()->getDepth()) {
 690                 if (!row->par()->getLayout()) {
 691                         // find the previous same level paragraph
 692                         if (row->par()->previous()) {
 693                                 Paragraph * newpar = row->par()
 694                                         ->depthHook(row->par()->getDepth());
 695                                 if (newpar &&
 696                                     tclass[newpar->getLayout()].nextnoindent)
 697                                         parindent.erase();
 698                         }
 699                 }
 700         } else {
 701                 // find the next level paragraph
 702
 703                 Paragraph * newpar =
 704                         row->par()->outerHook();
 705
 706                 // make a corresponding row. Needed to call LeftMargin()
 707
 708                 // check wether it is a sufficent paragraph
 709                 if (newpar && tclass[newpar->getLayout()].isEnvironment())
 710                 {
 711                         Row dummyrow;
 712                         dummyrow.par(newpar);
 713                         dummyrow.pos(newpar->size());
 714                         x = leftMargin(bview, &dummyrow);
 715                 } else {
 716                         // this is no longer an error, because this function
 717                         // is used to clear impossible depths after changing
 718                         // a layout. Since there is always a redo,
 719                         // LeftMargin() is always called
 720                         row->par()->params().depth(0);
 721                 }
 722
 723                 if (newpar && !row->par()->getLayout()) {
 724                         if (newpar->params().noindent())
 725                                 parindent.erase();
 726                         else
 727                                 parindent = tclass[newpar->getLayout()].parindent;
 728                 }
 729
 730         }
 731
 732         LyXFont const labelfont = getLabelFont(bview->buffer(), row->par());
 733         switch (layout.margintype) {
 734         case MARGIN_DYNAMIC:
 735                 if (!layout.leftmargin.empty()) {
 736                         x += lyxfont::signedWidth(layout.leftmargin,
 737                                                   tclass.defaultfont());
 738                 }
 739                 if (!row->par()->getLabelstring().empty()) {
 740                         x += lyxfont::signedWidth(layout.labelindent,
 741                                                   labelfont);
 742                         x += lyxfont::width(row->par()->getLabelstring(),
 743                                             labelfont);
 744                         x += lyxfont::width(layout.labelsep, labelfont);
 745                 }
 746                 break;
 747         case MARGIN_MANUAL:
 748                 x += lyxfont::signedWidth(layout.labelindent, labelfont);
 749                 if (row->pos() >= beginningOfMainBody(bview->buffer(), row->par())) {
 750                         if (!row->par()->getLabelWidthString().empty()) {
 751                                 x += lyxfont::width(row->par()->getLabelWidthString(),
 752                                                labelfont);
 753                                 x += lyxfont::width(layout.labelsep, labelfont);
 754                         }
 755                 }
 756                 break;
 757         case MARGIN_STATIC:
 758                 x += lyxfont::signedWidth(layout.leftmargin, tclass.defaultfont()) * 4
 759                         / (row->par()->getDepth() + 4);
 760                 break;
 761         case MARGIN_FIRST_DYNAMIC:
 762                 if (layout.labeltype == LABEL_MANUAL) {
 763                         if (row->pos() >= beginningOfMainBody(bview->buffer(), row->par())) {
 764                                 x += lyxfont::signedWidth(layout.leftmargin,
 765                                                           labelfont);
 766                         } else {
 767                                 x += lyxfont::signedWidth(layout.labelindent,
 768                                                           labelfont);
 769                         }
 770                 } else if (row->pos()
 771                            // Special case to fix problems with
 772                            // theorems (JMarc)
 773                            || (layout.labeltype == LABEL_STATIC
 774                                && layout.latextype == LATEX_ENVIRONMENT
 775                                && ! row->par()->isFirstInSequence())) {
 776                         x += lyxfont::signedWidth(layout.leftmargin,
 777                                                   labelfont);
 778                 } else if (layout.labeltype != LABEL_TOP_ENVIRONMENT
 779                            && layout.labeltype != LABEL_BIBLIO
 780                            && layout.labeltype !=
 781                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 782                         x += lyxfont::signedWidth(layout.labelindent,
 783                                                   labelfont);
 784                         x += lyxfont::width(layout.labelsep, labelfont);
 785                         x += lyxfont::width(row->par()->getLabelstring(),
 786                                             labelfont);
 787                 }
 788                 break;
 789
 790         case MARGIN_RIGHT_ADDRESS_BOX:
 791         {
 792                 // ok, a terrible hack. The left margin depends on the widest
 793                 // row in this paragraph. Do not care about footnotes, they
 794                 // are *NOT* allowed in the LaTeX realisation of this layout.
 795
 796                 // find the first row of this paragraph
 797                 Row const * tmprow = row;
 798                 while (tmprow->previous()
 799                        && tmprow->previous()->par() == row->par())
 800                         tmprow = tmprow->previous();
 801
 802                 int minfill = tmprow->fill();
 803                 while (tmprow->next() && tmprow->next()->par() == row->par()) {
 804                         tmprow = tmprow->next();
 805                         if (tmprow->fill() < minfill)
 806                                 minfill = tmprow->fill();
 807                 }
 808
 809                 x += lyxfont::signedWidth(layout.leftmargin,
 810                                           tclass.defaultfont());
 811                 x += minfill;
 812         }
 813         break;
 814         }
 815
 816         LyXAlignment align; // wrong type
 817
 818         if (row->par()->params().align() == LYX_ALIGN_LAYOUT)
 819                 align = layout.align;
 820         else
 821                 align = row->par()->params().align();
 822
 823         // set the correct parindent
 824         if (row->pos() == 0) {
 825                 if ((layout.labeltype == LABEL_NO_LABEL
 826                      || layout.labeltype == LABEL_TOP_ENVIRONMENT
 827                      || layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 828                      || (layout.labeltype == LABEL_STATIC
 829                          && layout.latextype == LATEX_ENVIRONMENT
 830                          && ! row->par()->isFirstInSequence()))
 831                     && align == LYX_ALIGN_BLOCK
 832                     && !row->par()->params().noindent()
 833                     && (row->par()->layout ||
 834                         bview->buffer()->params.paragraph_separation ==
 835                         BufferParams::PARSEP_INDENT))
 836                         x += lyxfont::signedWidth(parindent,
 837                                                   tclass.defaultfont());
 838                 else if (layout.labeltype == LABEL_BIBLIO) {
 839                         // ale970405 Right width for bibitems
 840                         x += bibitemMaxWidth(bview, tclass.defaultfont());
 841                 }
 842         }
 843         return x;
 844 }
 845
 846
 847 int LyXText::rightMargin(Buffer const * buf, Row const * row) const
 848 {
 849         LyXTextClass const & tclass =
 850                 textclasslist.TextClass(buf->params.textclass);
 851         LyXLayout const & layout = tclass[row->par()->getLayout()];
 852
 853         int x = LYX_PAPER_MARGIN
 854                 + lyxfont::signedWidth(tclass.rightmargin(),
 855                                        tclass.defaultfont());
 856
 857         // this is the way, LyX handles the LaTeX-Environments.
 858         // I have had this idea very late, so it seems to be a
 859         // later added hack and this is true
 860         if (row->par()->getDepth()) {
 861                 // find the next level paragraph
 862
 863                 Paragraph * newpar = row->par();
 864
 865                 do {
 866                         newpar = newpar->previous();
 867                 } while (newpar
 868                          && newpar->getDepth() >= row->par()->getDepth());
 869
 870                 // make a corresponding row. Needed to call LeftMargin()
 871
 872                 // check wether it is a sufficent paragraph
 873                 if (newpar
 874                     && tclass[newpar->getLayout()].isEnvironment()) {
 875                         Row dummyrow;
 876                         dummyrow.par(newpar);
 877                         dummyrow.pos(0);
 878                         x = rightMargin(buf, &dummyrow);
 879                 } else {
 880                         // this is no longer an error, because this function
 881                         // is used to clear impossible depths after changing
 882                         // a layout. Since there is always a redo,
 883                         // LeftMargin() is always called
 884                         row->par()->params().depth(0);
 885                 }
 886         }
 887
 888         //lyxerr << "rightmargin: " << layout->rightmargin << endl;
 889         x += lyxfont::signedWidth(layout.rightmargin, tclass.defaultfont())
 890                 * 4 / (row->par()->getDepth() + 4);
 891         return x;
 892 }
 893
 894
 895 int LyXText::labelEnd(BufferView * bview, Row const * row) const
 896 {
 897         if (textclasslist.Style(bview->buffer()->params.textclass,
 898                                 row->par()->getLayout()).margintype
 899             == MARGIN_MANUAL) {
 900                 Row tmprow;
 901                 tmprow = *row;
 902                 tmprow.pos(row->par()->size());
 903                 return leftMargin(bview, &tmprow);  /* just the beginning
 904                                                 of the main body */
 905         } else
 906                 return 0;  /* LabelEnd is only needed, if the
 907                               layout fills a flushleft
 908                               label. */
 909 }
 910
 911
 912 // get the next breakpoint in a given paragraph
 913 pos_type
 914 LyXText::nextBreakPoint(BufferView * bview, Row const * row, int width) const
 915 {
 916         Paragraph * par = row->par();
 917
 918         if (width < 0)
 919                 return par->size();
 920
 921         pos_type const pos = row->pos();
 922
 923         // position of the last possible breakpoint
 924         // -1 isn't a suitable value, but a flag
 925         pos_type last_separator = -1;
 926         width -= rightMargin(bview->buffer(), row);
 927
 928         pos_type const main_body =
 929                 beginningOfMainBody(bview->buffer(), par);
 930         LyXLayout const & layout =
 931                 textclasslist.Style(bview->buffer()->params.textclass,
 932                                     par->getLayout());
 933         pos_type i = pos;
 934
 935         if (layout.margintype == MARGIN_RIGHT_ADDRESS_BOX) {
 936                 /* special code for right address boxes, only newlines count */
 937                 while (i < par->size()) {
 938                         if (par->isNewline(i)) {
 939                                 last_separator = i;
 940                                 i = par->size() - 1; // this means break
 941                                 //x = width;
 942                         } else if (par->isInset(i) && par->getInset(i)
 943                                 && par->getInset(i)->display()) {
 944                                 par->getInset(i)->display(false);
 945                         }
 946                         ++i;
 947                 }
 948         } else {
 949                 // Last position is an invariant
 950                 pos_type const last =
 951                         par->size();
 952                 // this is the usual handling
 953                 int x = leftMargin(bview, row);
 954                 bool doitonetime = true;
 955                 while (doitonetime || ((x < width) && (i < last))) {
 956                         doitonetime = false;
 957                         char const c = par->getChar(i);
 958                         Inset * in = 0;
 959                         if (c == Paragraph::META_INSET)
 960                                 in = par->getInset(i);
 961                         if (IsNewlineChar(c)) {
 962                                 last_separator = i;
 963                                 x = width; // this means break
 964                         } else if (in && !in->isChar()) {
 965                                 // check wether a Display() inset is
 966                                 // valid here. if not, change it to
 967                                 // non-display
 968                                 if (in->display() &&
 969                                     (layout.isCommand() ||
 970                                      (layout.labeltype == LABEL_MANUAL
 971                                       && i < beginningOfMainBody(bview->buffer(), par))))
 972                                 {
 973                                         // display istn't allowd
 974                                         in->display(false);
 975                                         x += singleWidth(bview, par, i, c);
 976                                 } else if (in->display() || in->needFullRow()) {
 977                                         // So break the line here
 978                                         if (i == pos) {
 979                                                 if (pos < last-1) {
 980                                                         last_separator = i;
 981                                                         if (IsLineSeparatorChar(par->getChar(i+1)))
 982                                                                 ++last_separator;
 983                                                 } else
 984                                                         last_separator = last; // to avoid extra rows
 985                                         } else
 986                                                 last_separator = i - 1;
 987                                         x = width;  // this means break
 988                                 } else {
 989                                         x += singleWidth(bview, par, i, c);
 990                                         // we have to check this separately as we could have a
 991                                         // lineseparator and then the algorithm below would prefer
 992                                         // that which IS wrong! We should always break on an inset
 993                                         // if it's too long and not on the last separator.
 994                                         // Maybe the only exeption is insets used as chars but
 995                                         // then we would have to have a special function inside
 996                                         // the inset to tell us this. Till then we leave it as
 997                                         // it is now. (Jug 20020106)
 998                                         if (pos < i && x >= width && last_separator >= 0)
 999                                                 last_separator = i - 1;
1000                                 }
1001                         } else  {
1002                                 if (IsLineSeparatorChar(c, in))
1003                                         last_separator = i;
1004                                 x += singleWidth(bview, par, i, c);
1005                         }
1006                         ++i;
1007                         if (i == main_body) {
1008                                 x += lyxfont::width(layout.labelsep,
1009                                                     getLabelFont(bview->buffer(), par));
1010                                 if (par->isLineSeparator(i - 1))
1011                                         x-= singleWidth(bview, par, i - 1);
1012                                 int left_margin = labelEnd(bview, row);
1013                                 if (x < left_margin)
1014                                         x = left_margin;
1015                         }
1016                 }
1017                 if ((pos+1 < i) && (last_separator < 0) && (x >= width))
1018                         last_separator = i - 2;
1019                 else if ((pos < i) && (last_separator < 0) && (x >= width))
1020                         last_separator = i - 1;
1021                 // end of paragraph is always a suitable separator
1022                 else if (i == last && x < width)
1023                         last_separator = i;
1024         }
1025
1026         // well, if last_separator is still 0, the line isn't breakable.
1027         // don't care and cut simply at the end
1028         if (last_separator < 0) {
1029                 last_separator = i;
1030         }
1031
1032         // manual labels cannot be broken in LaTeX, do not care
1033         if (main_body && last_separator < main_body)
1034                 last_separator = main_body - 1;
1035
1036         return last_separator;
1037 }
1038
1039
1040 // returns the minimum space a row needs on the screen in pixel
1041 int LyXText::fill(BufferView * bview, Row * row, int paper_width) const
1042 {
1043         if (paper_width < 0)
1044                 return 0;
1045
1046         int w;
1047         // get the pure distance
1048         pos_type const last = rowLastPrintable(row);
1049
1050         // special handling of the right address boxes
1051         if (textclasslist.Style(bview->buffer()->params.textclass,
1052                                 row->par()->getLayout()).margintype
1053             == MARGIN_RIGHT_ADDRESS_BOX)
1054         {
1055                 int const tmpfill = row->fill();
1056                 row->fill(0); // the minfill in MarginLeft()
1057                 w = leftMargin(bview, row);
1058                 row->fill(tmpfill);
1059         } else
1060                 w = leftMargin(bview, row);
1061
1062         LyXLayout const & layout = textclasslist.Style(bview->buffer()->params.textclass,
1063                                                        row->par()->getLayout());
1064         pos_type const main_body =
1065                 beginningOfMainBody(bview->buffer(), row->par());
1066         pos_type i = row->pos();
1067
1068         while (i <= last) {
1069                 if (main_body > 0 && i == main_body) {
1070                         w += lyxfont::width(layout.labelsep, getLabelFont(bview->buffer(), row->par()));
1071                         if (row->par()->isLineSeparator(i - 1))
1072                                 w -= singleWidth(bview, row->par(), i - 1);
1073                         int left_margin = labelEnd(bview, row);
1074                         if (w < left_margin)
1075                                 w = left_margin;
1076                 }
1077                 w += singleWidth(bview, row->par(), i);
1078                 ++i;
1079         }
1080         if (main_body > 0 && main_body > last) {
1081                 w += lyxfont::width(layout.labelsep, getLabelFont(bview->buffer(), row->par()));
1082                 if (last >= 0 && row->par()->isLineSeparator(last))
1083                         w -= singleWidth(bview, row->par(), last);
1084                 int const left_margin = labelEnd(bview, row);
1085                 if (w < left_margin)
1086                         w = left_margin;
1087         }
1088
1089         int const fill = paper_width - w - rightMargin(bview->buffer(), row);
1090         return fill;
1091 }
1092
1093
1094 // returns the minimum space a manual label needs on the screen in pixel
1095 int LyXText::labelFill(BufferView * bview, Row const * row) const
1096 {
1097         pos_type last = beginningOfMainBody(bview->buffer(), row->par()) - 1;
1098         // -1 because a label ends either with a space that is in the label,
1099         // or with the beginning of a footnote that is outside the label.
1100
1101         // I don't understand this code in depth, but sometimes "last" is
1102         // less than 0 and this causes a crash. This fix seems to work
1103         // correctly, but I bet the real error is elsewhere.  The bug is
1104         // triggered when you have an open footnote in a paragraph
1105         // environment with a manual label. (Asger)
1106         if (last < 0) last = 0;
1107
1108         if (row->par()->isLineSeparator(last)) /* a sepearator at this end
1109                                                 does not count */
1110                 --last;
1111
1112         int w = 0;
1113         pos_type i = row->pos();
1114         while (i <= last) {
1115                 w += singleWidth(bview, row->par(), i);
1116                 ++i;
1117         }
1118
1119         int fill = 0;
1120         if (!row->par()->params().labelWidthString().empty()) {
1121                 fill = max(lyxfont::width(row->par()->params().labelWidthString(),
1122                                           getLabelFont(bview->buffer(), row->par())) - w,
1123                            0);
1124         }
1125
1126         return fill;
1127 }
1128
1129
1130 // returns the number of separators in the specified row. The separator
1131 // on the very last column doesnt count
1132 int LyXText::numberOfSeparators(Buffer const * buf, Row const * row) const
1133 {
1134         pos_type const last = rowLast(row);
1135         pos_type p = max(row->pos(), beginningOfMainBody(buf, row->par()));
1136         int n = 0;
1137         for (; p < last; ++p) {
1138                 if (row->par()->isSeparator(p)) {
1139                         ++n;
1140                 }
1141         }
1142         return n;
1143 }
1144
1145
1146 // returns the number of hfills in the specified row. The LyX-Hfill is
1147 // a LaTeX \hfill so that the hfills at the beginning and at the end were
1148 // ignored. This is *MUCH* more usefull than not to ignore!
1149 int LyXText::numberOfHfills(Buffer const * buf, Row const * row) const
1150 {
1151         pos_type const last = rowLast(row);
1152         pos_type first = row->pos();
1153
1154         if (first) { /* hfill *DO* count at the beginning
1155                       * of paragraphs! */
1156                 while (first <= last && row->par()->isHfill(first)) {
1157                         ++first;
1158                 }
1159         }
1160
1161         first = max(first, beginningOfMainBody(buf, row->par()));
1162         int n = 0;
1163         for (pos_type p = first; p <= last; ++p) {
1164                 // last, because the end is ignored!
1165
1166                 if (row->par()->isHfill(p)) {
1167                         ++n;
1168                 }
1169         }
1170         return n;
1171 }
1172
1173
1174 // like NumberOfHfills, but only those in the manual label!
1175 int LyXText::numberOfLabelHfills(Buffer const * buf, Row const * row) const
1176 {
1177         pos_type last = rowLast(row);
1178         pos_type first = row->pos();
1179         if (first) { /* hfill *DO* count at the beginning
1180                       * of paragraphs! */
1181                 while (first < last && row->par()->isHfill(first))
1182                         ++first;
1183         }
1184
1185         last = min(last, beginningOfMainBody(buf, row->par()));
1186         int n = 0;
1187         for (pos_type p = first; p < last; ++p) {
1188                 // last, because the end is ignored!
1189                 if (row->par()->isHfill(p)) {
1190                         ++n;
1191                 }
1192         }
1193         return n;
1194 }
1195
1196
1197 // returns true, if a expansion is needed.
1198 // Rules are given by LaTeX
1199 bool LyXText::hfillExpansion(Buffer const * buf, Row const * row_ptr,
1200                              pos_type pos) const
1201 {
1202         // by the way, is it a hfill?
1203         if (!row_ptr->par()->isHfill(pos))
1204                 return false;
1205
1206         // at the end of a row it does not count
1207         // unless another hfill exists on the line
1208         if (pos >= rowLast(row_ptr)) {
1209                 pos_type i = row_ptr->pos();
1210                 while (i < pos && !row_ptr->par()->isHfill(i)) {
1211                         ++i;
1212                 }
1213                 if (i == pos) {
1214                         return false;
1215                 }
1216         }
1217
1218         // at the beginning of a row it does not count, if it is not
1219         // the first row of a paragaph
1220         if (!row_ptr->pos())
1221                 return true;
1222
1223         // in some labels  it does not count
1224         if (textclasslist.Style(buf->params.textclass,
1225                                 row_ptr->par()->getLayout()).margintype
1226             != MARGIN_MANUAL
1227             && pos < beginningOfMainBody(buf, row_ptr->par()))
1228                 return false;
1229
1230         // if there is anything between the first char of the row and
1231         // the sepcified position that is not a newline and not a hfill,
1232         // the hfill will count, otherwise not
1233         pos_type i = row_ptr->pos();
1234         while (i < pos && (row_ptr->par()->isNewline(i)
1235                            || row_ptr->par()->isHfill(i)))
1236                 ++i;
1237
1238         return i != pos;
1239 }
1240
1241
1242 LColor::color LyXText::backgroundColor()
1243 {
1244         if (inset_owner)
1245                 return inset_owner->backgroundColor();
1246         else
1247                 return LColor::background;
1248 }
1249
1250 void LyXText::setHeightOfRow(BufferView * bview, Row * row_ptr) const
1251 {
1252         /* get the maximum ascent and the maximum descent */
1253         int asc = 0;
1254         int desc = 0;
1255         float layoutasc = 0;
1256         float layoutdesc = 0;
1257         float tmptop = 0;
1258         LyXFont tmpfont;
1259         Inset * tmpinset = 0;
1260
1261         /* ok , let us initialize the maxasc and maxdesc value.
1262          * This depends in LaTeX of the font of the last character
1263          * in the paragraph. The hack below is necessary because
1264          * of the possibility of open footnotes */
1265
1266         /* Correction: only the fontsize count. The other properties
1267            are taken from the layoutfont. Nicer on the screen :) */
1268         Paragraph * par = row_ptr->par();
1269         Paragraph * firstpar = row_ptr->par();
1270
1271         LyXLayout const & layout = textclasslist.Style(bview->buffer()->params.textclass,
1272                                                        firstpar->getLayout());
1273
1274         // as max get the first character of this row then it can increes but not
1275         // decrees the height. Just some point to start with so we don't have to
1276         // do the assignment below too often.
1277         LyXFont font = getFont(bview->buffer(), par, row_ptr->pos());
1278         LyXFont::FONT_SIZE const tmpsize = font.size();
1279         font = getLayoutFont(bview->buffer(), par);
1280         LyXFont::FONT_SIZE const size = font.size();
1281         font.setSize(tmpsize);
1282
1283         LyXFont labelfont = getLabelFont(bview->buffer(), par);
1284
1285         float spacing_val = 1.0;
1286         if (!row_ptr->par()->params().spacing().isDefault()) {
1287                 spacing_val = row_ptr->par()->params().spacing().getValue();
1288         } else {
1289                 spacing_val = bview->buffer()->params.spacing.getValue();
1290         }
1291         //lyxerr << "spacing_val = " << spacing_val << endl;
1292
1293         int maxasc = int(lyxfont::maxAscent(font) *
1294                          layout.spacing.getValue() *
1295                          spacing_val);
1296         int maxdesc = int(lyxfont::maxDescent(font) *
1297                           layout.spacing.getValue() *
1298                           spacing_val);
1299         pos_type const pos_end = rowLast(row_ptr);
1300         int labeladdon = 0;
1301         int maxwidth = 0;
1302
1303         // Check if any insets are larger
1304         for (pos_type pos = row_ptr->pos(); pos <= pos_end; ++pos) {
1305                 if (row_ptr->par()->isInset(pos)) {
1306                         tmpfont = getFont(bview->buffer(), row_ptr->par(), pos);
1307                         tmpinset = row_ptr->par()->getInset(pos);
1308                         if (tmpinset) {
1309 #if 1 // this is needed for deep update on initialitation
1310                                 tmpinset->update(bview, tmpfont);
1311 #endif
1312                                 asc = tmpinset->ascent(bview, tmpfont);
1313                                 desc = tmpinset->descent(bview, tmpfont);
1314                                 maxwidth += tmpinset->width(bview, tmpfont);
1315                                 maxasc = max(maxasc, asc);
1316                                 maxdesc = max(maxdesc, desc);
1317                         }
1318                 } else {
1319                         maxwidth += singleWidth(bview, row_ptr->par(), pos);
1320                 }
1321         }
1322
1323         // Check if any custom fonts are larger (Asger)
1324         // This is not completely correct, but we can live with the small,
1325         // cosmetic error for now.
1326         LyXFont::FONT_SIZE maxsize =
1327                 row_ptr->par()->highestFontInRange(row_ptr->pos(), pos_end, size);
1328         if (maxsize > font.size()) {
1329                 font.setSize(maxsize);
1330
1331                 asc = lyxfont::maxAscent(font);
1332                 desc = lyxfont::maxDescent(font);
1333                 if (asc > maxasc)
1334                         maxasc = asc;
1335                 if (desc > maxdesc)
1336                         maxdesc = desc;
1337         }
1338
1339         // This is nicer with box insets:
1340         ++maxasc;
1341         ++maxdesc;
1342
1343         row_ptr->ascent_of_text(maxasc);
1344
1345         // is it a top line?
1346         if (!row_ptr->pos() && (row_ptr->par() == firstpar)) {
1347
1348                 // some parksips VERY EASY IMPLEMENTATION
1349                 if (bview->buffer()->params.paragraph_separation ==
1350                         BufferParams::PARSEP_SKIP)
1351                 {
1352                         if (layout.isParagraph()
1353                                 && firstpar->getDepth() == 0
1354                                 && firstpar->previous())
1355                         {
1356                                 maxasc += bview->buffer()->params.getDefSkip().inPixels(bview);
1357                         } else if (firstpar->previous() &&
1358                                    textclasslist.Style(bview->buffer()->params.textclass,
1359                                                        firstpar->previous()->
1360                                                        getLayout()).isParagraph() &&
1361                                    firstpar->previous()->getDepth() == 0)
1362                         {
1363                                 // is it right to use defskip here too? (AS)
1364                                 maxasc += bview->buffer()->params.getDefSkip().inPixels(bview);
1365                         }
1366                 }
1367
1368                 // the paper margins
1369                 if (!row_ptr->par()->previous() && bv_owner)
1370                         maxasc += LYX_PAPER_MARGIN;
1371
1372                 // add the vertical spaces, that the user added
1373                 maxasc += getLengthMarkerHeight(bview, firstpar->params().spaceTop());
1374
1375                 // do not forget the DTP-lines!
1376                 // there height depends on the font of the nearest character
1377                 if (firstpar->params().lineTop())
1378                         maxasc += 2 * lyxfont::ascent('x', getFont(bview->buffer(),
1379                                                                    firstpar, 0));
1380
1381                 // and now the pagebreaks
1382                 if (firstpar->params().pagebreakTop())
1383                         maxasc += 3 * defaultHeight();
1384
1385                 // This is special code for the chapter, since the label of this
1386                 // layout is printed in an extra row
1387                 if (layout.labeltype == LABEL_COUNTER_CHAPTER
1388                         && bview->buffer()->params.secnumdepth >= 0)
1389                 {
1390                         float spacing_val = 1.0;
1391                         if (!row_ptr->par()->params().spacing().isDefault()) {
1392                                 spacing_val = row_ptr->par()->params().spacing().getValue();
1393                         } else {
1394                                 spacing_val = bview->buffer()->params.spacing.getValue();
1395                         }
1396
1397                         labeladdon = int(lyxfont::maxDescent(labelfont) *
1398                                          layout.spacing.getValue() *
1399                                          spacing_val)
1400                                 + int(lyxfont::maxAscent(labelfont) *
1401                                       layout.spacing.getValue() *
1402                                       spacing_val);
1403                 }
1404
1405                 // special code for the top label
1406                 if ((layout.labeltype == LABEL_TOP_ENVIRONMENT
1407                      || layout.labeltype == LABEL_BIBLIO
1408                      || layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
1409                     && row_ptr->par()->isFirstInSequence()
1410                     && !row_ptr->par()->getLabelstring().empty())
1411                 {
1412                         float spacing_val = 1.0;
1413                         if (!row_ptr->par()->params().spacing().isDefault()) {
1414                                 spacing_val = row_ptr->par()->params().spacing().getValue();
1415                         } else {
1416                                 spacing_val = bview->buffer()->params.spacing.getValue();
1417                         }
1418
1419                         labeladdon = int(
1420                                 (lyxfont::maxAscent(labelfont) *
1421                                  layout.spacing.getValue() *
1422                                  spacing_val)
1423                                 +(lyxfont::maxDescent(labelfont) *
1424                                   layout.spacing.getValue() *
1425                                   spacing_val)
1426                                 + layout.topsep * defaultHeight()
1427                                 + layout.labelbottomsep *  defaultHeight());
1428                 }
1429
1430                 // and now the layout spaces, for example before and after a section,
1431                 // or between the items of a itemize or enumerate environment
1432
1433                 if (!firstpar->params().pagebreakTop()) {
1434                         Paragraph * prev = row_ptr->par()->previous();
1435                         if (prev)
1436                                 prev = row_ptr->par()->depthHook(row_ptr->par()->getDepth());
1437                         if (prev && prev->getLayout() == firstpar->getLayout() &&
1438                                 prev->getDepth() == firstpar->getDepth() &&
1439                                 prev->getLabelWidthString() == firstpar->getLabelWidthString())
1440                         {
1441                                 layoutasc = (layout.itemsep * defaultHeight());
1442                         } else if (row_ptr->previous()) {
1443                                 tmptop = layout.topsep;
1444
1445                                 if (row_ptr->previous()->par()->getDepth() >= row_ptr->par()->getDepth())
1446                                         tmptop -= textclasslist.Style(bview->buffer()->params.textclass,
1447                                                                       row_ptr->previous()->par()->
1448                                                                       getLayout()).bottomsep;
1449
1450                                 if (tmptop > 0)
1451                                         layoutasc = (tmptop * defaultHeight());
1452                         } else if (row_ptr->par()->params().lineTop()) {
1453                                 tmptop = layout.topsep;
1454
1455                                 if (tmptop > 0)
1456                                         layoutasc = (tmptop * defaultHeight());
1457                         }
1458
1459                         prev = row_ptr->par()->outerHook();
1460                         if (prev)  {
1461                                 maxasc += int(textclasslist.Style(bview->buffer()->params.textclass,
1462                                               prev->getLayout()).parsep * defaultHeight());
1463                         } else {
1464                                 if (firstpar->previous() &&
1465                                         firstpar->previous()->getDepth() == 0 &&
1466                                         firstpar->previous()->getLayout() !=
1467                                         firstpar->getLayout())
1468                                 {
1469                                         // avoid parsep
1470                                 } else if (firstpar->previous()) {
1471                                         maxasc += int(layout.parsep * defaultHeight());
1472                                 }
1473                         }
1474                 }
1475         }
1476
1477         // is it a bottom line?
1478         if (row_ptr->par() == par
1479                 && (!row_ptr->next() || row_ptr->next()->par() != row_ptr->par()))
1480         {
1481                 // the paper margins
1482                 if (!par->next() && bv_owner)
1483                         maxdesc += LYX_PAPER_MARGIN;
1484
1485                 // add the vertical spaces, that the user added
1486                 maxdesc += getLengthMarkerHeight(bview, firstpar->params().spaceBottom());
1487
1488                 // do not forget the DTP-lines!
1489                 // there height depends on the font of the nearest character
1490                 if (firstpar->params().lineBottom())
1491                         maxdesc += 2 * lyxfont::ascent('x',
1492                                                        getFont(bview->buffer(),
1493                                                                par,
1494                                                                max(pos_type(0), par->size() - 1)));
1495
1496                 // and now the pagebreaks
1497                 if (firstpar->params().pagebreakBottom())
1498                         maxdesc += 3 * defaultHeight();
1499
1500                 // and now the layout spaces, for example before and after
1501                 // a section, or between the items of a itemize or enumerate
1502                 // environment
1503                 if (!firstpar->params().pagebreakBottom()
1504                     && row_ptr->par()->next()) {
1505                         Paragraph * nextpar = row_ptr->par()->next();
1506                         Paragraph * comparepar = row_ptr->par();
1507                         float usual = 0;
1508                         float unusual = 0;
1509
1510                         if (comparepar->getDepth() > nextpar->getDepth()) {
1511                                 usual = (textclasslist.Style(bview->buffer()->params.textclass,
1512                                          comparepar->getLayout()).bottomsep * defaultHeight());
1513                                 comparepar = comparepar->depthHook(nextpar->getDepth());
1514                                 if (comparepar->getLayout()!= nextpar->getLayout()
1515                                         || nextpar->getLabelWidthString() !=
1516                                         comparepar->getLabelWidthString())
1517                                 {
1518                                         unusual = (textclasslist.Style(bview->buffer()->params.textclass,
1519                                                    comparepar->getLayout()).bottomsep * defaultHeight());
1520                                 }
1521                                 if (unusual > usual)
1522                                         layoutdesc = unusual;
1523                                 else
1524                                         layoutdesc = usual;
1525                         } else if (comparepar->getDepth() ==  nextpar->getDepth()) {
1526
1527                                 if (comparepar->getLayout()!= nextpar->getLayout()
1528                                         || nextpar->getLabelWidthString() !=
1529                                         comparepar->getLabelWidthString())
1530                                         layoutdesc = int(textclasslist.Style(bview->buffer()->params.textclass,
1531                                                                                                                  comparepar->getLayout()).bottomsep * defaultHeight());
1532                         }
1533                 }
1534         }
1535
1536         // incalculate the layout spaces
1537         maxasc += int(layoutasc * 2 / (2 + firstpar->getDepth()));
1538         maxdesc += int(layoutdesc * 2 / (2 + firstpar->getDepth()));
1539
1540         // calculate the new height of the text
1541         height -= row_ptr->height();
1542
1543         row_ptr->height(maxasc + maxdesc + labeladdon);
1544         row_ptr->baseline(maxasc + labeladdon);
1545
1546         height += row_ptr->height();
1547         float x = 0;
1548         if (layout.margintype != MARGIN_RIGHT_ADDRESS_BOX) {
1549                 float dummy;
1550                 // this IS needed
1551                 row_ptr->width(maxwidth);
1552                 prepareToPrint(bview, row_ptr, x, dummy, dummy, dummy, false);
1553         }
1554         row_ptr->width(int(maxwidth + x));
1555         if (inset_owner) {
1556                 Row * r = firstrow;
1557                 width = max(0,workWidth(bview));
1558                 while (r) {
1559                         if (r->width() > width)
1560                                 width = r->width();
1561                         r = r->next();
1562                 }
1563         }
1564 }
1565
1566
1567 /* Appends the implicit specified paragraph behind the specified row,
1568  * start at the implicit given position */
1569 void LyXText::appendParagraph(BufferView * bview, Row * row) const
1570 {
1571         bool not_ready = true;
1572
1573         // The last character position of a paragraph is an invariant so we can
1574         // safely get it here. (Asger)
1575         pos_type const lastposition = row->par()->size();
1576         do {
1577                 // Get the next breakpoint
1578                 pos_type z = nextBreakPoint(bview, row, workWidth(bview));
1579
1580                 Row * tmprow = row;
1581
1582                 // Insert the new row
1583                 if (z < lastposition) {
1584                         ++z;
1585                         insertRow(row, row->par(), z);
1586                         row = row->next();
1587
1588                         row->height(0);
1589                 } else
1590                         not_ready = false;
1591
1592                 // Set the dimensions of the row
1593                 // fixed fill setting now by calling inset->update() in
1594                 // SingleWidth when needed!
1595                 tmprow->fill(fill(bview, tmprow, workWidth(bview)));
1596                 setHeightOfRow(bview, tmprow);
1597
1598         } while (not_ready);
1599 }
1600
1601
1602 void LyXText::breakAgain(BufferView * bview, Row * row) const
1603 {
1604         bool not_ready = true;
1605
1606         do  {
1607                 // get the next breakpoint
1608                 pos_type z = nextBreakPoint(bview, row, workWidth(bview));
1609                 Row * tmprow = row;
1610
1611                 if (z < row->par()->size()) {
1612                         if (!row->next() || (row->next() && row->next()->par() != row->par())) {
1613                                 // insert a new row
1614                                 ++z;
1615                                 insertRow(row, row->par(), z);
1616                                 row = row->next();
1617                                 row->height(0);
1618                         } else  {
1619                                 row = row->next();
1620                                 ++z;
1621                                 if (row->pos() == z)
1622                                         not_ready = false;     // the rest will not change
1623                                 else {
1624                                         row->pos(z);
1625                                 }
1626                         }
1627                 } else {
1628                         /* if there are some rows too much, delete them */
1629                         /* only if you broke the whole paragraph! */
1630                         Row * tmprow2 = row;
1631                         while (tmprow2->next() && tmprow2->next()->par() == row->par()) {
1632                                 tmprow2 = tmprow2->next();
1633                         }
1634                         while (tmprow2 != row) {
1635                                 tmprow2 = tmprow2->previous();
1636                                 removeRow(tmprow2->next());
1637                         }
1638                         not_ready = false;
1639                 }
1640
1641                 /* set the dimensions of the row */
1642                 tmprow->fill(fill(bview, tmprow, workWidth(bview)));
1643                 setHeightOfRow(bview, tmprow);
1644         } while (not_ready);
1645 }
1646
1647
1648 // this is just a little changed version of break again
1649 void LyXText::breakAgainOneRow(BufferView * bview, Row * row)
1650 {
1651         // get the next breakpoint
1652         pos_type z = nextBreakPoint(bview, row, workWidth(bview));
1653         Row * tmprow = row;
1654
1655         if (z < row->par()->size()) {
1656                 if (!row->next()
1657                     || (row->next() && row->next()->par() != row->par())) {
1658                         /* insert a new row */
1659                         ++z;
1660                         insertRow(row, row->par(), z);
1661                         row = row->next();
1662                         row->height(0);
1663                 } else  {
1664                         row= row->next();
1665                         ++z;
1666                         if (row->pos() != z)
1667                                 row->pos(z);
1668                 }
1669         } else {
1670                 // if there are some rows too much, delete them
1671                 // only if you broke the whole paragraph!
1672                 Row * tmprow2 = row;
1673                 while (tmprow2->next()
1674                        && tmprow2->next()->par() == row->par()) {
1675                         tmprow2 = tmprow2->next();
1676                 }
1677                 while (tmprow2 != row) {
1678                         tmprow2 = tmprow2->previous();
1679                         removeRow(tmprow2->next());
1680                 }
1681         }
1682
1683         // set the dimensions of the row
1684         tmprow->fill(fill(bview, tmprow, workWidth(bview)));
1685         setHeightOfRow(bview, tmprow);
1686 }
1687
1688
1689 void LyXText::breakParagraph(BufferView * bview, char keep_layout)
1690 {
1691    LyXLayout const & layout =
1692            textclasslist.Style(bview->buffer()->params.textclass,
1693                                cursor.par()->getLayout());
1694
1695    // this is only allowed, if the current paragraph is not empty or caption
1696    if ((cursor.par()->size() <= 0)
1697        && layout.labeltype!= LABEL_SENSITIVE)
1698            return;
1699
1700    setUndo(bview, Undo::INSERT,cursor.par(),cursor.par()->next());
1701
1702    // Always break behind a space
1703    //
1704    // It is better to erase the space (Dekel)
1705    if (cursor.pos() < cursor.par()->size()
1706        && cursor.par()->isLineSeparator(cursor.pos()))
1707            cursor.par()->erase(cursor.pos());
1708            // cursor.pos(cursor.pos() + 1);
1709
1710    // break the paragraph
1711    if (keep_layout)
1712      keep_layout = 2;
1713    else
1714      keep_layout = layout.isEnvironment();
1715    cursor.par()->breakParagraph(bview->buffer()->params, cursor.pos(),
1716                                 keep_layout);
1717
1718    // well this is the caption hack since one caption is really enough
1719    if (layout.labeltype == LABEL_SENSITIVE) {
1720      if (!cursor.pos())
1721              // set to standard-layout
1722              cursor.par()->setLayout(0);
1723      else
1724              // set to standard-layout
1725              cursor.par()->next()->setLayout(0);
1726    }
1727
1728    /* if the cursor is at the beginning of a row without prior newline,
1729     * move one row up!
1730     * This touches only the screen-update. Otherwise we would may have
1731     * an empty row on the screen */
1732    if (cursor.pos() && !cursor.row()->par()->isNewline(cursor.row()->pos() - 1)
1733        && cursor.row()->pos() == cursor.pos()) {
1734            cursorLeft(bview);
1735    }
1736
1737    status(bview, LyXText::NEED_MORE_REFRESH);
1738    refresh_row = cursor.row();
1739    refresh_y = cursor.y() - cursor.row()->baseline();
1740
1741    // Do not forget the special right address boxes
1742    if (layout.margintype == MARGIN_RIGHT_ADDRESS_BOX) {
1743       while (refresh_row->previous() &&
1744              refresh_row->previous()->par() == refresh_row->par()) {
1745               refresh_row = refresh_row->previous();
1746               refresh_y -= refresh_row->height();
1747       }
1748    }
1749    removeParagraph(cursor.row());
1750
1751    // set the dimensions of the cursor row
1752    cursor.row()->fill(fill(bview, cursor.row(), workWidth(bview)));
1753
1754    setHeightOfRow(bview, cursor.row());
1755
1756    while (cursor.par()->next()->size()
1757           && cursor.par()->next()->isNewline(0))
1758            cursor.par()->next()->erase(0);
1759
1760    insertParagraph(bview, cursor.par()->next(), cursor.row());
1761
1762    updateCounters(bview, cursor.row()->previous());
1763
1764    /* This check is necessary. Otherwise the new empty paragraph will
1765     * be deleted automatically. And it is more friendly for the user! */
1766    if (cursor.pos())
1767            setCursor(bview, cursor.par()->next(), 0);
1768    else
1769            setCursor(bview, cursor.par(), 0);
1770
1771    if (cursor.row()->next())
1772            breakAgain(bview, cursor.row()->next());
1773
1774    need_break_row = 0;
1775 }
1776
1777
1778 // Just a macro to make some thing easier.
1779 void LyXText::redoParagraph(BufferView * bview) const
1780 {
1781         clearSelection();
1782         redoParagraphs(bview, cursor, cursor.par()->next());
1783         setCursorIntern(bview, cursor.par(), cursor.pos());
1784 }
1785
1786
1787 /* insert a character, moves all the following breaks in the
1788  * same Paragraph one to the right and make a rebreak */
1789 void LyXText::insertChar(BufferView * bview, char c)
1790 {
1791         setUndo(bview, Undo::INSERT,
1792                 cursor.par(), cursor.par()->next());
1793
1794         // When the free-spacing option is set for the current layout,
1795         // disable the double-space checking
1796
1797         bool const freeSpacing =
1798                 textclasslist.Style(bview->buffer()->params.textclass,
1799                                cursor.row()->par()->getLayout()).free_spacing ||
1800                 cursor.row()->par()->isFreeSpacing();
1801
1802
1803         if (lyxrc.auto_number) {
1804                 static string const number_operators = "+-/*";
1805                 static string const number_unary_operators = "+-";
1806                 static string const number_seperators = ".,:";
1807
1808                 if (current_font.number() == LyXFont::ON) {
1809                         if (!IsDigit(c) && !contains(number_operators, c) &&
1810                             !(contains(number_seperators, c) &&
1811                               cursor.pos() >= 1 &&
1812                               cursor.pos() < cursor.par()->size() &&
1813                               getFont(bview->buffer(),
1814                                       cursor.par(),
1815                                       cursor.pos()).number() == LyXFont::ON &&
1816                               getFont(bview->buffer(),
1817                                       cursor.par(),
1818                                       cursor.pos() - 1).number() == LyXFont::ON)
1819                             )
1820                                 number(bview); // Set current_font.number to OFF
1821                 } else if (IsDigit(c) &&
1822                            real_current_font.isVisibleRightToLeft()) {
1823                         number(bview); // Set current_font.number to ON
1824
1825                         if (cursor.pos() > 0) {
1826                                 char const c = cursor.par()->getChar(cursor.pos() - 1);
1827                                 if (contains(number_unary_operators, c) &&
1828                                     (cursor.pos() == 1 ||
1829                                      cursor.par()->isSeparator(cursor.pos() - 2) ||
1830                                      cursor.par()->isNewline(cursor.pos() - 2) )
1831                                    ) {
1832                                         setCharFont(bview->buffer(),
1833                                                     cursor.par(),
1834                                                     cursor.pos() - 1,
1835                                                     current_font);
1836                                 } else if (contains(number_seperators, c) &&
1837                                            cursor.pos() >= 2 &&
1838                                            getFont(bview->buffer(),
1839                                                    cursor.par(),
1840                                                    cursor.pos() - 2).number() == LyXFont::ON) {
1841                                         setCharFont(bview->buffer(),
1842                                                     cursor.par(),
1843                                                     cursor.pos() - 1,
1844                                                     current_font);
1845                                 }
1846                         }
1847                 }
1848         }
1849
1850
1851         /* First check, if there will be two blanks together or a blank at
1852           the beginning of a paragraph.
1853           I decided to handle blanks like normal characters, the main
1854           difference are the special checks when calculating the row.fill
1855           (blank does not count at the end of a row) and the check here */
1856
1857         // The bug is triggered when we type in a description environment:
1858         // The current_font is not changed when we go from label to main text
1859         // and it should (along with realtmpfont) when we type the space.
1860         // CHECK There is a bug here! (Asger)
1861
1862         LyXFont realtmpfont = real_current_font;
1863         LyXFont rawtmpfont = current_font;  /* store the current font.
1864                                      * This is because of the use
1865                                      * of cursor movements. The moving
1866                                      * cursor would refresh the
1867                                      * current font */
1868
1869         // Get the font that is used to calculate the baselineskip
1870         pos_type const lastpos = cursor.par()->size();
1871         LyXFont rawparfont =
1872                 cursor.par()->getFontSettings(bview->buffer()->params,
1873                                               lastpos - 1);
1874
1875         bool jumped_over_space = false;
1876
1877         if (!freeSpacing && IsLineSeparatorChar(c)) {
1878                 if ((cursor.pos() > 0
1879                      && cursor.par()->isLineSeparator(cursor.pos() - 1))
1880                     || (cursor.pos() > 0
1881                         && cursor.par()->isNewline(cursor.pos() - 1))
1882                     || (cursor.pos() == 0)) {
1883                         static bool sent_space_message = false;
1884                         if (!sent_space_message) {
1885                                 if (cursor.pos() == 0)
1886                                         bview->owner()->message(_("You cannot insert a space at the beginning of a paragraph.  Please read the Tutorial."));
1887                                 else
1888                                         bview->owner()->message(_("You cannot type two spaces this way.  Please read the Tutorial."));
1889                                 sent_space_message = true;
1890                         }
1891                         charInserted();
1892                         return;
1893                 }
1894         } else if (IsNewlineChar(c)) {
1895                 if (cursor.par() == cursor.par()
1896                     && cursor.pos() <= beginningOfMainBody(bview->buffer(), cursor.par())) {
1897                         charInserted();
1898                         return;
1899                 }
1900                 /* No newline at first position
1901                  * of a paragraph or behind labels.
1902                  * TeX does not allow that. */
1903
1904                 if (cursor.pos() < cursor.par()->size() &&
1905                     cursor.par()->isLineSeparator(cursor.pos()))
1906                         // newline always after a blank!
1907                         cursorRight(bview);
1908                 cursor.row()->fill(-1);        // to force a new break
1909         }
1910
1911         // the display inset stuff
1912         if (cursor.row()->par()->isInset(cursor.row()->pos())) {
1913                 Inset * inset = cursor.row()->par()->getInset(cursor.row()->pos());
1914                 if (inset && (inset->display() || inset->needFullRow())) {
1915                         // force a new break
1916                         cursor.row()->fill(-1); // to force a new break
1917                 }
1918         }
1919
1920         // get the cursor row fist
1921         Row * row = cursor.row();
1922         int y = cursor.y() - row->baseline();
1923         if (c != Paragraph::META_INSET) /* Here case LyXText::InsertInset
1924                                             * already insertet the character */
1925                 cursor.par()->insertChar(cursor.pos(), c);
1926         setCharFont(bview->buffer(), cursor.par(), cursor.pos(), rawtmpfont);
1927
1928         if (!jumped_over_space) {
1929                 // refresh the positions
1930                 Row * tmprow = row;
1931                 while (tmprow->next() && tmprow->next()->par() == row->par()) {
1932                         tmprow = tmprow->next();
1933                         tmprow->pos(tmprow->pos() + 1);
1934                 }
1935         }
1936
1937         // Is there a break one row above
1938         if ((cursor.par()->isLineSeparator(cursor.pos())
1939              || cursor.par()->isNewline(cursor.pos())
1940                  || ((cursor.pos() < cursor.par()->size()) &&
1941                          cursor.par()->isInset(cursor.pos()+1))
1942              || cursor.row()->fill() == -1)
1943             && row->previous() && row->previous()->par() == row->par()) {
1944                 pos_type z = nextBreakPoint(bview,
1945                                                            row->previous(),
1946                                                            workWidth(bview));
1947                 if (z >= row->pos()) {
1948                         row->pos(z + 1);
1949
1950                         // set the dimensions of the row above
1951                         row->previous()->fill(fill(bview,
1952                                                    row->previous(),
1953                                                    workWidth(bview)));
1954
1955                         setHeightOfRow(bview, row->previous());
1956
1957                         y -= row->previous()->height();
1958                         refresh_y = y;
1959                         refresh_row = row->previous();
1960                         status(bview, LyXText::NEED_MORE_REFRESH);
1961
1962                         breakAgainOneRow(bview, row);
1963
1964                         current_font = rawtmpfont;
1965                         real_current_font = realtmpfont;
1966                         setCursor(bview, cursor.par(), cursor.pos() + 1,
1967                                   false, cursor.boundary());
1968                         // cursor MUST be in row now.
1969
1970                         if (row->next() && row->next()->par() == row->par())
1971                                 need_break_row = row->next();
1972                         else
1973                                 need_break_row = 0;
1974
1975                         // check, wether the last characters font has changed.
1976                         if (cursor.pos() && cursor.pos() == cursor.par()->size()
1977                             && rawparfont != rawtmpfont)
1978                                 redoHeightOfParagraph(bview, cursor);
1979
1980                         charInserted();
1981                         return;
1982                 }
1983         }
1984
1985         // recalculate the fill of the row
1986         if (row->fill() >= 0)  /* needed because a newline
1987                               * will set fill to -1. Otherwise
1988                               * we would not get a rebreak! */
1989                 row->fill(fill(bview, row, workWidth(bview)));
1990         if (row->fill() < 0) {
1991                 refresh_y = y;
1992                 refresh_row = row;
1993                 refresh_x = cursor.x();
1994                 refresh_pos = cursor.pos();
1995                 status(bview, LyXText::NEED_MORE_REFRESH);
1996                 breakAgainOneRow(bview, row);
1997                 // will the cursor be in another row now?
1998                 if (rowLast(row) <= cursor.pos() + 1 && row->next()) {
1999                         if (row->next() && row->next()->par() == row->par())
2000                                 // this should always be true
2001                                 row = row->next();
2002                         breakAgainOneRow(bview, row);
2003                 }
2004                 current_font = rawtmpfont;
2005                 real_current_font = realtmpfont;
2006
2007                 setCursor(bview, cursor.par(), cursor.pos() + 1, false,
2008                           cursor.boundary());
2009                 if (isBoundary(bview->buffer(), cursor.par(), cursor.pos())
2010                     != cursor.boundary())
2011                         setCursor(bview, cursor.par(), cursor.pos(), false,
2012                           !cursor.boundary());
2013                 if (row->next() && row->next()->par() == row->par())
2014                         need_break_row = row->next();
2015                 else
2016                         need_break_row = 0;
2017         } else {
2018                 refresh_y = y;
2019                 refresh_x = cursor.x();
2020                 refresh_row = row;
2021                 refresh_pos = cursor.pos();
2022
2023                 int const tmpheight = row->height();
2024                 setHeightOfRow(bview, row);
2025                 if (tmpheight == row->height())
2026                         status(bview, LyXText::NEED_VERY_LITTLE_REFRESH);
2027                 else
2028                         status(bview, LyXText::NEED_MORE_REFRESH);
2029
2030                 current_font = rawtmpfont;
2031                 real_current_font = realtmpfont;
2032                 setCursor(bview, cursor.par(), cursor.pos() + 1, false,
2033                           cursor.boundary());
2034         }
2035
2036         // check, wether the last characters font has changed.
2037         if (cursor.pos() && cursor.pos() == cursor.par()->size()
2038             && rawparfont != rawtmpfont) {
2039                 redoHeightOfParagraph(bview, cursor);
2040         } else {
2041                 // now the special right address boxes
2042                 if (textclasslist.Style(bview->buffer()->params.textclass,
2043                                    cursor.par()->getLayout()).margintype
2044                     == MARGIN_RIGHT_ADDRESS_BOX) {
2045                         redoDrawingOfParagraph(bview, cursor);
2046                 }
2047         }
2048
2049         charInserted();
2050 }
2051
2052
2053 void LyXText::charInserted()
2054 {
2055         // Here we could call FinishUndo for every 20 characters inserted.
2056         // This is from my experience how emacs does it.
2057         static unsigned int counter;
2058         if (counter < 20) {
2059                 ++counter;
2060         } else {
2061                 finishUndo();
2062                 counter = 0;
2063         }
2064 }
2065
2066
2067 void LyXText::prepareToPrint(BufferView * bview,
2068                              Row * row, float & x,
2069                              float & fill_separator,
2070                              float & fill_hfill,
2071                              float & fill_label_hfill,
2072                              bool bidi) const
2073 {
2074         float nlh;
2075         float ns;
2076
2077         float w = row->fill();
2078         fill_hfill = 0;
2079         fill_label_hfill = 0;
2080         fill_separator = 0;
2081         fill_label_hfill = 0;
2082
2083         bool const is_rtl =
2084                 row->par()->isRightToLeftPar(bview->buffer()->params);
2085         if (is_rtl) {
2086                 x = (workWidth(bview) > 0)
2087                         ? rightMargin(bview->buffer(), row) : 0;
2088         } else
2089                 x = (workWidth(bview) > 0) ? leftMargin(bview, row) : 0;
2090
2091         // is there a manual margin with a manual label
2092         if (textclasslist.Style(bview->buffer()->params.textclass,
2093                            row->par()->getLayout()).margintype == MARGIN_MANUAL
2094             && textclasslist.Style(bview->buffer()->params.textclass,
2095                               row->par()->getLayout()).labeltype == LABEL_MANUAL) {
2096
2097                 /* one more since labels are left aligned */
2098                 nlh = numberOfLabelHfills(bview->buffer(), row) + 1;
2099                 if (nlh && !row->par()->getLabelWidthString().empty()) {
2100                         fill_label_hfill = labelFill(bview, row) / nlh;
2101                 }
2102         }
2103
2104         // are there any hfills in the row?
2105         float const nh = numberOfHfills(bview->buffer(), row);
2106
2107         if (nh) {
2108                 if (w > 0)
2109                         fill_hfill = w / nh;
2110         // we don't have to look at the alignment if it is ALIGN_LEFT and
2111         // if the row is already larger then the permitted width as then
2112         // we force the LEFT_ALIGN'edness!
2113         } else if (static_cast<int>(row->width()) < workWidth(bview)) {
2114                 // is it block, flushleft or flushright?
2115                 // set x how you need it
2116                 int align;
2117                 if (row->par()->params().align() == LYX_ALIGN_LAYOUT) {
2118                         align = textclasslist.Style(bview->buffer()->params.textclass, row->par()->getLayout()).align;
2119                 } else {
2120                         align = row->par()->params().align();
2121                 }
2122
2123                 // center displayed insets
2124                 Inset * inset;
2125                 if (row->par()->isInset(row->pos())
2126                     && (inset=row->par()->getInset(row->pos()))
2127                     && (inset->display())) // || (inset->scroll() < 0)))
2128                     align = (inset->lyxCode() == Inset::MATHMACRO_CODE)
2129                         ? LYX_ALIGN_BLOCK : LYX_ALIGN_CENTER;
2130
2131                 switch (align) {
2132             case LYX_ALIGN_BLOCK:
2133                         ns = numberOfSeparators(bview->buffer(), row);
2134                         if (ns && row->next() && row->next()->par() == row->par() &&
2135                             !(row->next()->par()->isNewline(row->next()->pos() - 1))
2136                             && !(row->next()->par()->isInset(row->next()->pos())
2137                                  && row->next()->par()->getInset(row->next()->pos())
2138                                  && row->next()->par()->getInset(row->next()->pos())->display())
2139                                 )
2140                         {
2141                                 fill_separator = w / ns;
2142                         } else if (is_rtl) {
2143                                 x += w;
2144                         }
2145                         break;
2146             case LYX_ALIGN_RIGHT:
2147                         x += w;
2148                         break;
2149             case LYX_ALIGN_CENTER:
2150                         x += w / 2;
2151                         break;
2152                 }
2153         }
2154         if (!bidi)
2155                 return;
2156
2157         computeBidiTables(bview->buffer(), row);
2158         if (is_rtl) {
2159                 pos_type main_body =
2160                         beginningOfMainBody(bview->buffer(), row->par());
2161                 pos_type last = rowLast(row);
2162
2163                 if (main_body > 0 &&
2164                     (main_body-1 > last ||
2165                      !row->par()->isLineSeparator(main_body-1))) {
2166                         LyXLayout const & layout =
2167                                 textclasslist.Style(bview->buffer()->params.textclass,
2168                                                     row->par()->getLayout());
2169                         x += lyxfont::width(layout.labelsep,
2170                                             getLabelFont(bview->buffer(), row->par()));
2171                         if (main_body-1 <= last)
2172                                 x += fill_label_hfill;
2173                 }
2174         }
2175 }
2176
2177 /* important for the screen */
2178
2179
2180 /* the cursor set functions have a special mechanism. When they
2181 * realize, that you left an empty paragraph, they will delete it.
2182 * They also delete the corresponding row */
2183
2184 void LyXText::cursorRightOneWord(BufferView * bview) const
2185 {
2186         // treat floats, HFills and Insets as words
2187         LyXCursor tmpcursor = cursor;
2188         // CHECK See comment on top of text.C
2189
2190         if (tmpcursor.pos() == tmpcursor.par()->size()
2191             && tmpcursor.par()->next()) {
2192                         tmpcursor.par(tmpcursor.par()->next());
2193                         tmpcursor.pos(0);
2194         } else {
2195                 int steps = 0;
2196
2197                 // Skip through initial nonword stuff.
2198                 while (tmpcursor.pos() < tmpcursor.par()->size() &&
2199                        ! tmpcursor.par()->isWord(tmpcursor.pos())) {
2200                   //    printf("Current pos1 %d", tmpcursor.pos()) ;
2201                         tmpcursor.pos(tmpcursor.pos() + 1);
2202                         ++steps;
2203                 }
2204                 // Advance through word.
2205                 while (tmpcursor.pos() < tmpcursor.par()->size() &&
2206                         tmpcursor.par()->isWord( tmpcursor.pos())) {
2207                   //     printf("Current pos2 %d", tmpcursor.pos()) ;
2208                         tmpcursor.pos(tmpcursor.pos() + 1);
2209                         ++steps;
2210                 }
2211         }
2212         setCursor(bview, tmpcursor.par(), tmpcursor.pos());
2213 }
2214
2215
2216 void LyXText::cursorTab(BufferView * bview) const
2217 {
2218     LyXCursor tmpcursor = cursor;
2219     while (tmpcursor.pos() < tmpcursor.par()->size()
2220            && !tmpcursor.par()->isNewline(tmpcursor.pos()))
2221         tmpcursor.pos(tmpcursor.pos() + 1);
2222
2223     if (tmpcursor.pos() == tmpcursor.par()->size()){
2224         if (tmpcursor.par()->next()) {
2225             tmpcursor.par(tmpcursor.par()->next());
2226             tmpcursor.pos(0);
2227         }
2228     } else
2229         tmpcursor.pos(tmpcursor.pos() + 1);
2230     setCursor(bview, tmpcursor.par(), tmpcursor.pos());
2231 }
2232
2233
2234 /* -------> Skip initial whitespace at end of word and move cursor to *start*
2235             of prior word, not to end of next prior word. */
2236
2237 void LyXText::cursorLeftOneWord(BufferView * bview)  const
2238 {
2239         LyXCursor tmpcursor = cursor;
2240         cursorLeftOneWord(tmpcursor);
2241         setCursor(bview, tmpcursor.par(), tmpcursor.pos());
2242 }
2243
2244 void LyXText::cursorLeftOneWord(LyXCursor  & cur)  const
2245 {
2246         // treat HFills, floats and Insets as words
2247         cur = cursor;
2248         while (cur.pos()
2249                && (cur.par()->isSeparator(cur.pos() - 1)
2250                    || cur.par()->isKomma(cur.pos() - 1))
2251                && !(cur.par()->isHfill(cur.pos() - 1)
2252                     || cur.par()->isInset(cur.pos() - 1)))
2253                 cur.pos(cur.pos() - 1);
2254
2255         if (cur.pos()
2256             && (cur.par()->isInset(cur.pos() - 1)
2257                 || cur.par()->isHfill(cur.pos() - 1))) {
2258                 cur.pos(cur.pos() - 1);
2259         } else if (!cur.pos()) {
2260                 if (cur.par()->previous()){
2261                         cur.par(cur.par()->previous());
2262                         cur.pos(cur.par()->size());
2263                 }
2264         } else {                // Here, cur != 0
2265                 while (cur.pos() > 0 &&
2266                        cur.par()->isWord(cur.pos()-1) )
2267                         cur.pos(cur.pos() - 1);
2268         }
2269 }
2270
2271 /* -------> Select current word. This depends on behaviour of
2272 CursorLeftOneWord(), so it is patched as well. */
2273 void LyXText::getWord(LyXCursor & from, LyXCursor & to,
2274                       word_location const loc) const
2275 {
2276         // first put the cursor where we wana start to select the word
2277         from = cursor;
2278         switch(loc) {
2279         case WHOLE_WORD_STRICT:
2280                 if (cursor.pos() == 0 || cursor.pos() == cursor.par()->size()
2281                     || cursor.par()->isSeparator(cursor.pos())
2282                     || cursor.par()->isKomma(cursor.pos())
2283                     || cursor.par()->isSeparator(cursor.pos() -1)
2284                     || cursor.par()->isKomma(cursor.pos() -1)) {
2285                         to = from;
2286                         return;
2287                 }
2288                 // no break here, we go to the next
2289
2290         case WHOLE_WORD:
2291                 // Move cursor to the beginning, when not already there.
2292                 if (from.pos() && !from.par()->isSeparator(from.pos() - 1)
2293                     && !from.par()->isKomma(from.pos() - 1))
2294                         cursorLeftOneWord(from);
2295                 break;
2296         case PREVIOUS_WORD:
2297                 // always move the cursor to the beginning of previous word
2298                 cursorLeftOneWord(from);
2299                 break;
2300         case NEXT_WORD:
2301                 lyxerr << "LyXText::getWord: NEXT_WORD not implemented yet\n";
2302                 break;
2303         case PARTIAL_WORD:
2304                 break;
2305         }
2306         to = from;
2307         while (to.pos() < to.par()->size()
2308                && !to.par()->isSeparator(to.pos())
2309                && !to.par()->isKomma(to.pos())
2310                && !to.par()->isHfill(to.pos()) )
2311         {
2312                 to.pos(to.pos() + 1);
2313         }
2314 }
2315
2316
2317 void LyXText::selectWord(BufferView * bview, word_location const loc)
2318 {
2319         LyXCursor from;
2320         LyXCursor to;
2321         getWord(from, to, loc);
2322         if (cursor != from)
2323                 setCursor(bview, from.par(), from.pos());
2324         if (to == from)
2325                 return;
2326         selection.cursor = cursor;
2327         setCursor(bview, to.par(), to.pos() );
2328         setSelection(bview);
2329 }
2330
2331
2332 /* -------> Select the word currently under the cursor when no
2333         selection is currently set */
2334 bool LyXText::selectWordWhenUnderCursor(BufferView * bview,
2335                                         word_location const loc)
2336 {
2337         if (!selection.set()) {
2338                 selectWord(bview, loc);
2339                 return selection.set();
2340         }
2341         return false;
2342 }
2343
2344
2345 // This function is only used by the spellchecker for NextWord().
2346 // It doesn't handle LYX_ACCENTs and probably never will.
2347 string const LyXText::selectNextWordToSpellcheck(BufferView * bview,
2348                                                  float & value) const
2349 {
2350         if (the_locking_inset) {
2351                 string str = the_locking_inset->selectNextWordToSpellcheck(bview, value);
2352                 if (!str.empty()) {
2353                         value += float(cursor.y())/float(height);
2354                         return str;
2355                 }
2356 #warning Dekel please have a look on this one RTL? (Jug)
2357 #warning DEKEL!
2358                 // we have to go on checking so move cusor to the right
2359                 if (cursor.pos() == cursor.par()->size()) {
2360                         if (!cursor.par()->next())
2361                                 return str;
2362                         cursor.par(cursor.par()->next());
2363                         cursor.pos(0);
2364                 } else
2365                         cursor.pos(cursor.pos() + 1);
2366         }
2367         Paragraph * tmppar = cursor.par();
2368
2369         // If this is not the very first word, skip rest of
2370         // current word because we are probably in the middle
2371         // of a word if there is text here.
2372         if (cursor.pos() || cursor.par()->previous()) {
2373                 while (cursor.pos() < cursor.par()->size()
2374                        && cursor.par()->isLetter(cursor.pos()))
2375                         cursor.pos(cursor.pos() + 1);
2376         }
2377
2378         // Now, skip until we have real text (will jump paragraphs)
2379         while ((cursor.par()->size() > cursor.pos()
2380                && (!cursor.par()->isLetter(cursor.pos()))
2381                && (!cursor.par()->isInset(cursor.pos()) ||
2382                            !cursor.par()->getInset(cursor.pos())->allowSpellcheck()))
2383                || (cursor.par()->size() == cursor.pos()
2384                    && cursor.par()->next()))
2385         {
2386                 if (cursor.pos() == cursor.par()->size()) {
2387                         cursor.par(cursor.par()->next());
2388                         cursor.pos(0);
2389                 } else
2390                         cursor.pos(cursor.pos() + 1);
2391         }
2392
2393         // now check if we hit an inset so it has to be a inset containing text!
2394         if (cursor.pos() < cursor.par()->size() &&
2395             cursor.par()->isInset(cursor.pos()))
2396         {
2397                 // lock the inset!
2398                 cursor.par()->getInset(cursor.pos())->edit(bview);
2399                 // now call us again to do the above trick
2400                 // but obviously we have to start from down below ;)
2401                 return bview->text->selectNextWordToSpellcheck(bview, value);
2402         }
2403
2404         // Update the value if we changed paragraphs
2405         if (cursor.par() != tmppar){
2406                 setCursor(bview, cursor.par(), cursor.pos());
2407                 value = float(cursor.y())/float(height);
2408         }
2409
2410         // Start the selection from here
2411         selection.cursor = cursor;
2412
2413         // and find the end of the word (insets like optional hyphens
2414         // and ligature break are part of a word)
2415         while (cursor.pos() < cursor.par()->size()
2416                && (cursor.par()->isLetter(cursor.pos())))
2417                 cursor.pos(cursor.pos() + 1);
2418
2419         // Finally, we copy the word to a string and return it
2420         string str;
2421         if (selection.cursor.pos() < cursor.pos()) {
2422                 pos_type i;
2423                 for (i = selection.cursor.pos(); i < cursor.pos(); ++i) {
2424                         if (!cursor.par()->isInset(i))
2425                                 str += cursor.par()->getChar(i);
2426                 }
2427         }
2428         return str;
2429 }
2430
2431
2432 // This one is also only for the spellchecker
2433 void LyXText::selectSelectedWord(BufferView * bview)
2434 {
2435         if (the_locking_inset) {
2436                 the_locking_inset->selectSelectedWord(bview);
2437                 return;
2438         }
2439         // move cursor to the beginning
2440         setCursor(bview, selection.cursor.par(), selection.cursor.pos());
2441
2442         // set the sel cursor
2443         selection.cursor = cursor;
2444
2445         // now find the end of the word
2446         while (cursor.pos() < cursor.par()->size()
2447                && (cursor.par()->isLetter(cursor.pos())))
2448                 cursor.pos(cursor.pos() + 1);
2449
2450         setCursor(bview, cursor.par(), cursor.pos());
2451
2452         // finally set the selection
2453         setSelection(bview);
2454 }
2455
2456
2457 /* -------> Delete from cursor up to the end of the current or next word. */
2458 void LyXText::deleteWordForward(BufferView * bview)
2459 {
2460         if (!cursor.par()->size())
2461                 cursorRight(bview);
2462         else {
2463                 LyXCursor tmpcursor = cursor;
2464                 tmpcursor.row(0); // ??
2465                 selection.set(true); // to avoid deletion
2466                 cursorRightOneWord(bview);
2467                 setCursor(bview, tmpcursor, tmpcursor.par(), tmpcursor.pos());
2468                 selection.cursor = cursor;
2469                 cursor = tmpcursor;
2470                 setSelection(bview);
2471
2472                 /* -----> Great, CutSelection() gets rid of multiple spaces. */
2473                 cutSelection(bview, true, false);
2474         }
2475 }
2476
2477
2478 /* -------> Delete from cursor to start of current or prior word. */
2479 void LyXText::deleteWordBackward(BufferView * bview)
2480 {
2481        if (!cursor.par()->size())
2482                cursorLeft(bview);
2483        else {
2484                LyXCursor tmpcursor = cursor;
2485                tmpcursor.row(0); // ??
2486                selection.set(true); // to avoid deletion
2487                cursorLeftOneWord(bview);
2488                setCursor(bview, tmpcursor, tmpcursor.par(), tmpcursor.pos());
2489                selection.cursor = cursor;
2490                cursor = tmpcursor;
2491                setSelection(bview);
2492                cutSelection(bview, true, false);
2493        }
2494 }
2495
2496
2497 /* -------> Kill to end of line. */
2498 void LyXText::deleteLineForward(BufferView * bview)
2499 {
2500         if (!cursor.par()->size())
2501                 // Paragraph is empty, so we just go to the right
2502                 cursorRight(bview);
2503         else {
2504                 LyXCursor tmpcursor = cursor;
2505                 // We can't store the row over a regular setCursor
2506                 // so we set it to 0 and reset it afterwards.
2507                 tmpcursor.row(0); // ??
2508                 selection.set(true); // to avoid deletion
2509                 cursorEnd(bview);
2510                 setCursor(bview, tmpcursor, tmpcursor.par(), tmpcursor.pos());
2511                 selection.cursor = cursor;
2512                 cursor = tmpcursor;
2513                 setSelection(bview);
2514                 // What is this test for ??? (JMarc)
2515                 if (!selection.set()) {
2516                         deleteWordForward(bview);
2517                 } else {
2518                         cutSelection(bview, true, false);
2519                 }
2520         }
2521 }
2522
2523
2524 // Change the case of a word at cursor position.
2525 // This function directly manipulates Paragraph::text because there
2526 // is no Paragraph::SetChar currently. I did what I could to ensure
2527 // that it is correct. I guess part of it should be moved to
2528 // Paragraph, but it will have to change for 1.1 anyway. At least
2529 // it does not access outside of the allocated array as the older
2530 // version did. (JMarc)
2531 void LyXText::changeCase(BufferView * bview, LyXText::TextCase action)
2532 {
2533         LyXCursor from;
2534         LyXCursor to;
2535
2536         if (selection.set()) {
2537                 from = selection.start;
2538                 to = selection.end;
2539         } else {
2540                 getWord(from, to, PARTIAL_WORD);
2541                 setCursor(bview, to.par(), to.pos() + 1);
2542         }
2543
2544         changeRegionCase(bview, from, to, action);
2545 }
2546
2547
2548 void LyXText::changeRegionCase(BufferView * bview,
2549                                LyXCursor const & from,
2550                                LyXCursor const & to,
2551                                LyXText::TextCase action)
2552 {
2553         lyx::Assert(from <= to);
2554
2555         setUndo(bview, Undo::FINISH,
2556                 from.par(), to.par()->next());
2557
2558         pos_type pos = from.pos();
2559         Paragraph * par = from.par();
2560
2561         while (par && (pos != to.pos() || par != to.par())) {
2562                 unsigned char c = par->getChar(pos);
2563                 if (!IsInsetChar(c) && !IsHfillChar(c)) {
2564                         switch (action) {
2565                         case text_lowercase:
2566                                 c = lowercase(c);
2567                                 break;
2568                         case text_capitalization:
2569                                 c = uppercase(c);
2570                                 action = text_lowercase;
2571                                 break;
2572                         case text_uppercase:
2573                                 c = uppercase(c);
2574                                 break;
2575                         }
2576                 }
2577                 par->setChar(pos, c);
2578                 checkParagraph(bview, par, pos);
2579
2580                 ++pos;
2581                 if (pos == par->size()) {
2582                         par = par->next();
2583                         pos = 0;
2584                 }
2585         }
2586         if (to.row() != from.row()) {
2587                 refresh_y = from.y() - from.row()->baseline();
2588                 refresh_row = from.row();
2589                 status(bview, LyXText::NEED_MORE_REFRESH);
2590         }
2591 }
2592
2593
2594 void LyXText::transposeChars(BufferView & bview)
2595 {
2596         Paragraph * tmppar = cursor.par();
2597
2598         setUndo(&bview, Undo::FINISH,
2599                 tmppar, tmppar->next());
2600
2601         pos_type tmppos = cursor.pos();
2602
2603         // First decide if it is possible to transpose at all
2604
2605         // We are at the beginning of a paragraph.
2606         if (tmppos == 0) return;
2607
2608         // We are at the end of a paragraph.
2609         if (tmppos == tmppar->size() - 1) return;
2610
2611         unsigned char c1 = tmppar->getChar(tmppos);
2612         unsigned char c2 = tmppar->getChar(tmppos - 1);
2613
2614         if (c1 != Paragraph::META_INSET
2615             && c2 != Paragraph::META_INSET) {
2616                 tmppar->setChar(tmppos, c2);
2617                 tmppar->setChar(tmppos - 1, c1);
2618         }
2619         // We should have an implementation that handles insets
2620         // as well, but that will have to come later. (Lgb)
2621         checkParagraph(const_cast<BufferView*>(&bview), tmppar, tmppos);
2622 }
2623
2624
2625 void LyXText::Delete(BufferView * bview)
2626 {
2627         // this is a very easy implementation
2628
2629         LyXCursor old_cursor = cursor;
2630         int const old_cur_par_id = old_cursor.par()->id();
2631         int const old_cur_par_prev_id = old_cursor.par()->previous() ?
2632                 old_cursor.par()->previous()->id() : 0;
2633
2634         // just move to the right
2635         cursorRight(bview);
2636
2637         // CHECK Look at the comment here.
2638         // This check is not very good...
2639         // The cursorRightIntern calls DeleteEmptyParagrapgMechanism
2640         // and that can very well delete the par or par->previous in
2641         // old_cursor. Will a solution where we compare paragraph id's
2642         //work better?
2643         if ((cursor.par()->previous() ? cursor.par()->previous()->id() : 0)
2644             == old_cur_par_prev_id
2645             && cursor.par()->id() != old_cur_par_id) {
2646                 // delete-empty-paragraph-mechanism has done it
2647                 return;
2648         }
2649
2650         // if you had success make a backspace
2651         if (old_cursor.par() != cursor.par() || old_cursor.pos() != cursor.pos()) {
2652                 LyXCursor tmpcursor = cursor;
2653                 // to make sure undo gets the right cursor position
2654                 cursor = old_cursor;
2655                 setUndo(bview, Undo::DELETE,
2656                         cursor.par(), cursor.par()->next());
2657                 cursor = tmpcursor;
2658                 backspace(bview);
2659         }
2660 }
2661
2662
2663 void LyXText::backspace(BufferView * bview)
2664 {
2665         // Get the font that is used to calculate the baselineskip
2666         pos_type lastpos = cursor.par()->size();
2667         LyXFont rawparfont =
2668                 cursor.par()->getFontSettings(bview->buffer()->params,
2669                                               lastpos - 1);
2670
2671         if (cursor.pos() == 0) {
2672                 // The cursor is at the beginning of a paragraph,
2673                 // so the the backspace will collapse two paragraphs into one.
2674
2675                 // we may paste some paragraphs
2676
2677                 // is it an empty paragraph?
2678
2679                 if ((lastpos == 0
2680                      || (lastpos == 1 && cursor.par()->isSeparator(0)))) {
2681                         // This is an empty paragraph and we delete it just by moving the cursor one step
2682                         // left and let the DeleteEmptyParagraphMechanism handle the actual deletion
2683                         // of the paragraph.
2684
2685                         if (cursor.par()->previous()) {
2686                                 Paragraph * tmppar = cursor.par()->previous();
2687                                 if (cursor.par()->getLayout() == tmppar->getLayout()
2688                                     && cursor.par()->getAlign() == tmppar->getAlign()) {
2689                                         // Inherit bottom DTD from the paragraph below.
2690                                         // (the one we are deleting)
2691                                         tmppar->params().lineBottom(cursor.par()->params().lineBottom());
2692                                         tmppar->params().spaceBottom(cursor.par()->params().spaceBottom());
2693                                         tmppar->params().pagebreakBottom(cursor.par()->params().pagebreakBottom());
2694                                 }
2695
2696                                 cursorLeft(bview);
2697
2698                                 // the layout things can change the height of a row !
2699                                 int const tmpheight = cursor.row()->height();
2700                                 setHeightOfRow(bview, cursor.row());
2701                                 if (cursor.row()->height() != tmpheight) {
2702                                         refresh_y = cursor.y() - cursor.row()->baseline();
2703                                         refresh_row = cursor.row();
2704                                         status(bview, LyXText::NEED_MORE_REFRESH);
2705                                 }
2706                                 return;
2707                         }
2708                 }
2709
2710                 if (cursor.par()->previous()) {
2711                         setUndo(bview, Undo::DELETE,
2712                                 cursor.par()->previous(), cursor.par()->next());
2713                 }
2714
2715                 Paragraph * tmppar = cursor.par();
2716                 Row * tmprow = cursor.row();
2717
2718                 // We used to do cursorLeftIntern() here, but it is
2719                 // not a good idea since it triggers the auto-delete
2720                 // mechanism. So we do a cursorLeftIntern()-lite,
2721                 // without the dreaded mechanism. (JMarc)
2722                 if (cursor.par()->previous()) {
2723                         // steps into the above paragraph.
2724                         setCursorIntern(bview, cursor.par()->previous(),
2725                                         cursor.par()->previous()->size(),
2726                                         false);
2727                 }
2728
2729                 /* Pasting is not allowed, if the paragraphs have different
2730                    layout. I think it is a real bug of all other
2731                    word processors to allow it. It confuses the user.
2732                    Even so with a footnote paragraph and a non-footnote
2733                    paragraph. I will not allow pasting in this case,
2734                    because the user would be confused if the footnote behaves
2735                    different wether it is open or closed.
2736
2737                    Correction: Pasting is always allowed with standard-layout
2738                 */
2739                 if (cursor.par() != tmppar
2740                     && (cursor.par()->getLayout() == tmppar->getLayout()
2741                         || tmppar->getLayout() == 0 /*standard*/)
2742                     && cursor.par()->getAlign() == tmppar->getAlign())
2743                 {
2744                         removeParagraph(tmprow);
2745                         removeRow(tmprow);
2746                         cursor.par()->pasteParagraph(bview->buffer()->params);
2747
2748                         if (!cursor.pos() || !cursor.par()->isSeparator(cursor.pos() - 1))
2749                                 ; //cursor.par()->insertChar(cursor.pos(), ' ');
2750                         // strangely enough it seems that commenting out the line above removes
2751                         // most or all of the segfaults. I will however also try to move the
2752                         // two Remove... lines in front of the PasteParagraph too.
2753                         else
2754                                 if (cursor.pos())
2755                                         cursor.pos(cursor.pos() - 1);
2756
2757                         status(bview, LyXText::NEED_MORE_REFRESH);
2758                         refresh_row = cursor.row();
2759                         refresh_y = cursor.y() - cursor.row()->baseline();
2760
2761                         // remove the lost paragraph
2762                         // This one is not safe, since the paragraph that the tmprow and the
2763                         // following rows belong to has been deleted by the PasteParagraph
2764                         // above. The question is... could this be moved in front of the
2765                         // PasteParagraph?
2766                         //RemoveParagraph(tmprow);
2767                         //RemoveRow(tmprow);
2768
2769                         // This rebuilds the rows.
2770                         appendParagraph(bview, cursor.row());
2771                         updateCounters(bview, cursor.row());
2772
2773                         // the row may have changed, block, hfills etc.
2774                         setCursor(bview, cursor.par(), cursor.pos(), false);
2775                 }
2776         } else {
2777                 /* this is the code for a normal backspace, not pasting
2778                  * any paragraphs */
2779                 setUndo(bview, Undo::DELETE,
2780                         cursor.par(), cursor.par()->next());
2781                 // We used to do cursorLeftIntern() here, but it is
2782                 // not a good idea since it triggers the auto-delete
2783                 // mechanism. So we do a cursorLeftIntern()-lite,
2784                 // without the dreaded mechanism. (JMarc)
2785                 setCursorIntern(bview, cursor.par(), cursor.pos()- 1,
2786                                 false, cursor.boundary());
2787
2788                 // some insets are undeletable here
2789                 if (cursor.par()->isInset(cursor.pos())) {
2790                         if (!cursor.par()->getInset(cursor.pos())->deletable())
2791                                 return;
2792                         // force complete redo when erasing display insets
2793                         // this is a cruel method but safe..... Matthias
2794                         if (cursor.par()->getInset(cursor.pos())->display() ||
2795                             cursor.par()->getInset(cursor.pos())->needFullRow()) {
2796                                 cursor.par()->erase(cursor.pos());
2797                                 redoParagraph(bview);
2798                                 return;
2799                         }
2800                 }
2801
2802                 Row * row = cursor.row();
2803                 int y = cursor.y() - row->baseline();
2804                 pos_type z;
2805                 /* remember that a space at the end of a row doesnt count
2806                  * when calculating the fill */
2807                 if (cursor.pos() < rowLast(row) ||
2808                     !cursor.par()->isLineSeparator(cursor.pos())) {
2809                         row->fill(row->fill() + singleWidth(bview,
2810                                                             cursor.par(),
2811                                                             cursor.pos()));
2812                 }
2813
2814                 /* some special code when deleting a newline. This is similar
2815                  * to the behavior when pasting paragraphs */
2816                 if (cursor.pos() && cursor.par()->isNewline(cursor.pos())) {
2817                         cursor.par()->erase(cursor.pos());
2818                         // refresh the positions
2819                         Row * tmprow = row;
2820                         while (tmprow->next() && tmprow->next()->par() == row->par()) {
2821                                 tmprow = tmprow->next();
2822                                 tmprow->pos(tmprow->pos() - 1);
2823                         }
2824                         if (cursor.par()->isLineSeparator(cursor.pos() - 1))
2825                                 cursor.pos(cursor.pos() - 1);
2826
2827                         if (cursor.pos() < cursor.par()->size()
2828                             && !cursor.par()->isSeparator(cursor.pos())) {
2829                                 cursor.par()->insertChar(cursor.pos(), ' ');
2830                                 setCharFont(bview->buffer(), cursor.par(),
2831                                             cursor.pos(), current_font);
2832                                 // refresh the positions
2833                                 tmprow = row;
2834                                 while (tmprow->next() && tmprow->next()->par() == row->par()) {
2835                                         tmprow = tmprow->next();
2836                                         tmprow->pos(tmprow->pos() + 1);
2837                                 }
2838                         }
2839                 } else {
2840                         cursor.par()->erase(cursor.pos());
2841
2842                         // refresh the positions
2843                         Row * tmprow = row;
2844                         while (tmprow->next()
2845                                && tmprow->next()->par() == row->par()) {
2846                                 tmprow = tmprow->next();
2847                                 tmprow->pos(tmprow->pos() - 1);
2848                         }
2849
2850                         // delete newlines at the beginning of paragraphs
2851                         while (cursor.par()->size() &&
2852                                cursor.par()->isNewline(cursor.pos()) &&
2853                                cursor.pos() == beginningOfMainBody(bview->buffer(),
2854                                                                    cursor.par())) {
2855                                 cursor.par()->erase(cursor.pos());
2856                                 // refresh the positions
2857                                 tmprow = row;
2858                                 while (tmprow->next() &&
2859                                        tmprow->next()->par() == row->par()) {
2860                                         tmprow = tmprow->next();
2861                                         tmprow->pos(tmprow->pos() - 1);
2862                                 }
2863                         }
2864                 }
2865
2866                 // is there a break one row above
2867                 if (row->previous() && row->previous()->par() == row->par()) {
2868                         z = nextBreakPoint(bview, row->previous(),
2869                                            workWidth(bview));
2870                         if (z >= row->pos()) {
2871                                 row->pos(z + 1);
2872
2873                                 Row * tmprow = row->previous();
2874
2875                                 // maybe the current row is now empty
2876                                 if (row->pos() >= row->par()->size()) {
2877                                         // remove it
2878                                         removeRow(row);
2879                                         need_break_row = 0;
2880                                 } else {
2881                                         breakAgainOneRow(bview, row);
2882                                         if (row->next() && row->next()->par() == row->par())
2883                                                 need_break_row = row->next();
2884                                         else
2885                                                 need_break_row = 0;
2886                                 }
2887
2888                                 // set the dimensions of the row above
2889                                 y -= tmprow->height();
2890                                 tmprow->fill(fill(bview, tmprow,
2891                                                   workWidth(bview)));
2892                                 setHeightOfRow(bview, tmprow);
2893
2894                                 refresh_y = y;
2895                                 refresh_row = tmprow;
2896                                 status(bview, LyXText::NEED_MORE_REFRESH);
2897                                 setCursor(bview, cursor.par(), cursor.pos(),
2898                                           false, cursor.boundary());
2899                                 //current_font = rawtmpfont;
2900                                 //real_current_font = realtmpfont;
2901                                 // check, whether the last character's font has changed.
2902                                 if (rawparfont !=
2903                                     cursor.par()->getFontSettings(bview->buffer()->params,
2904                                                                   cursor.par()->size() - 1))
2905                                         redoHeightOfParagraph(bview, cursor);
2906                                 return;
2907                         }
2908                 }
2909
2910                 // break the cursor row again
2911                 if (row->next() && row->next()->par() == row->par() &&
2912                     (rowLast(row) == row->par()->size() - 1 ||
2913                      nextBreakPoint(bview, row, workWidth(bview)) != rowLast(row))) {
2914
2915                         /* it can happen that a paragraph loses one row
2916                          * without a real breakup. This is when a word
2917                          * is to long to be broken. Well, I don t care this
2918                          * hack ;-) */
2919                         if (rowLast(row) == row->par()->size() - 1)
2920                                 removeRow(row->next());
2921
2922                         refresh_y = y;
2923                         refresh_row = row;
2924                         status(bview, LyXText::NEED_MORE_REFRESH);
2925
2926                         breakAgainOneRow(bview, row);
2927                         // will the cursor be in another row now?
2928                         if (row->next() && row->next()->par() == row->par() &&
2929                             rowLast(row) <= cursor.pos()) {
2930                                 row = row->next();
2931                                 breakAgainOneRow(bview, row);
2932                         }
2933
2934                         setCursor(bview, cursor.par(), cursor.pos(), false, cursor.boundary());
2935
2936                         if (row->next() && row->next()->par() == row->par())
2937                                 need_break_row = row->next();
2938                         else
2939                                 need_break_row = 0;
2940                 } else  {
2941                         // set the dimensions of the row
2942                         row->fill(fill(bview, row, workWidth(bview)));
2943                         int const tmpheight = row->height();
2944                         setHeightOfRow(bview, row);
2945                         if (tmpheight == row->height())
2946                                 status(bview, LyXText::NEED_VERY_LITTLE_REFRESH);
2947                         else
2948                                 status(bview, LyXText::NEED_MORE_REFRESH);
2949                         refresh_y = y;
2950                         refresh_row = row;
2951                         setCursor(bview, cursor.par(), cursor.pos(), false, cursor.boundary());
2952                 }
2953         }
2954
2955         // current_font = rawtmpfont;
2956         // real_current_font = realtmpfont;
2957
2958         if (isBoundary(bview->buffer(), cursor.par(), cursor.pos())
2959             != cursor.boundary())
2960                 setCursor(bview, cursor.par(), cursor.pos(), false,
2961                           !cursor.boundary());
2962
2963         lastpos = cursor.par()->size();
2964         if (cursor.pos() == lastpos)
2965                 setCurrentFont(bview);
2966
2967         // check, whether the last characters font has changed.
2968         if (rawparfont !=
2969             cursor.par()->getFontSettings(bview->buffer()->params, lastpos - 1)) {
2970                 redoHeightOfParagraph(bview, cursor);
2971         } else {
2972                 // now the special right address boxes
2973                 if (textclasslist.Style(bview->buffer()->params.textclass,
2974                                         cursor.par()->getLayout()).margintype == MARGIN_RIGHT_ADDRESS_BOX) {
2975                         redoDrawingOfParagraph(bview, cursor);
2976                 }
2977         }
2978 }
2979
2980
2981 bool LyXText::paintRowBackground(DrawRowParams & p)
2982 {
2983         bool clear_area = true;
2984         Inset * inset = 0;
2985         LyXFont font(LyXFont::ALL_SANE);
2986
2987         pos_type const last = rowLastPrintable(p.row);
2988
2989         if (!p.bv->screen()->forceClear() && last == p.row->pos()
2990                 && p.row->par()->isInset(p.row->pos())) {
2991                 inset = p.row->par()->getInset(p.row->pos());
2992                 if (inset) {
2993                         clear_area = inset->doClearArea();
2994                 }
2995         }
2996
2997         if (p.cleared) {
2998                 return true;
2999         }
3000
3001         if (clear_area) {
3002                 int const x = p.xo;
3003                 int const y = p.yo < 0 ? 0 : p.yo;
3004                 int const h = p.yo < 0 ? p.row->height() + p.yo : p.row->height();
3005                 p.pain->fillRectangle(x, y, p.width, h, backgroundColor());
3006                 return true;
3007         }
3008
3009         if (inset == 0)
3010                 return false;
3011
3012         int h = p.row->baseline() - inset->ascent(p.bv, font);
3013
3014         // first clear the whole row above the inset!
3015         if (h > 0) {
3016                 p.pain->fillRectangle(p.xo, p.yo, p.width, h, backgroundColor());
3017         }
3018
3019         // clear the space below the inset!
3020         h += inset->ascent(p.bv, font) + inset->descent(p.bv, font);
3021         if ((p.row->height() - h) > 0) {
3022                 p.pain->fillRectangle(p.xo, p.yo + h,
3023                         p.width, p.row->height() - h, backgroundColor());
3024         }
3025
3026         // clear the space behind the inset, if needed
3027         if (!inset->display() && !inset->needFullRow()) {
3028                 int const xp = int(p.x) + inset->width(p.bv, font);
3029                 if (p.width - xp > 0) {
3030                         p.pain->fillRectangle(xp, p.yo, p.width - xp,
3031                                 p.row->height(), backgroundColor());
3032                 }
3033         }
3034
3035         return false;
3036 }
3037
3038
3039 void LyXText::paintRowSelection(DrawRowParams & p)
3040 {
3041         bool const is_rtl = p.row->par()->isRightToLeftPar(p.bv->buffer()->params);
3042
3043         // the current selection
3044         int const startx = selection.start.x();
3045         int const endx = selection.end.x();
3046         int const starty = selection.start.y();
3047         int const endy = selection.end.y();
3048         Row const * startrow = selection.start.row();
3049         Row const * endrow = selection.end.row();
3050
3051         Row * row = p.row;
3052
3053         if (bidi_same_direction) {
3054                 int x;
3055                 int y = p.yo;
3056                 int w;
3057                 int h = row->height();
3058
3059                 if (startrow == row && endrow == row) {
3060                         if (startx < endx) {
3061                                 x = p.xo + startx;
3062                                 w = endx - startx;
3063                                 p.pain->fillRectangle(x, y, w, h, LColor::selection);
3064                         } else {
3065                                 x = p.xo + endx;
3066                                 w = startx - endx;
3067                                 p.pain->fillRectangle(x, y, w, h, LColor::selection);
3068                         }
3069                 } else if (startrow == row) {
3070                         int const x = (is_rtl) ? p.xo : (p.xo + startx);
3071                         int const w = (is_rtl) ? startx : (p.width - startx);
3072                         p.pain->fillRectangle(x, y, w, h, LColor::selection);
3073                 } else if (endrow == row) {
3074                         int const x = (is_rtl) ? (p.xo + endx) : p.xo;
3075                         int const w = (is_rtl) ? (p.width - endx) : endx;
3076                         p.pain->fillRectangle(x, y, w, h, LColor::selection);
3077                 } else if (p.y > starty && p.y < endy) {
3078                         p.pain->fillRectangle(p.xo, y, p.width, h, LColor::selection);
3079                 }
3080                 return;
3081         } else if (startrow != row && endrow != row) {
3082                 int w = p.width;
3083                 int h = row->height();
3084                 if (p.y > starty && p.y < endy) {
3085                         p.pain->fillRectangle(p.xo, p.yo, w, h, LColor::selection);
3086                 }
3087                 return;
3088         }
3089
3090         if (!((startrow != row && !is_rtl) || (endrow != row && is_rtl))) {
3091                 return;
3092         }
3093
3094         float tmpx = p.x;
3095
3096         p.pain->fillRectangle(p.xo, p.yo, int(p.x), row->height(), LColor::selection);
3097
3098         Buffer const * buffer = p.bv->buffer();
3099         Paragraph * par = row->par();
3100         pos_type main_body = beginningOfMainBody(buffer, par);
3101         pos_type const last = rowLastPrintable(row);
3102
3103         for (pos_type vpos = row->pos(); vpos <= last; ++vpos)  {
3104                 pos_type pos = vis2log(vpos);
3105                 float const old_tmpx = tmpx;
3106                 if (main_body > 0 && pos == main_body - 1) {
3107                         LyXLayout const & layout = textclasslist.Style(buffer->params.textclass,
3108                                 par->getLayout());
3109                         LyXFont const lfont = getLabelFont(buffer, par);
3110
3111
3112                         tmpx += p.label_hfill + lyxfont::width(layout.labelsep, lfont);
3113
3114                         if (par->isLineSeparator(main_body - 1))
3115                                 tmpx -= singleWidth(p.bv, par, main_body - 1);
3116                 }
3117
3118                 if (hfillExpansion(buffer, row, pos)) {
3119                         tmpx += singleWidth(p.bv, par, pos);
3120                         if (pos >= main_body)
3121                                 tmpx += p.hfill;
3122                         else
3123                                 tmpx += p.label_hfill;
3124                 }
3125
3126                 else if (par->isSeparator(pos)) {
3127                         tmpx += singleWidth(p.bv, par, pos);
3128                         if (pos >= main_body)
3129                                 tmpx += p.separator;
3130                 } else {
3131                         tmpx += singleWidth(p.bv, par, pos);
3132                 }
3133
3134                 if ((startrow != row || selection.start.pos() <= pos) &&
3135                         (endrow != row || pos < selection.end.pos())) {
3136                         // Here we do not use p.x as p.xo was added to p.x.
3137                         p.pain->fillRectangle(int(old_tmpx), p.yo,
3138                                 int(tmpx - old_tmpx + 1),
3139                                 row->height(), LColor::selection);
3140                 }
3141
3142                 if ((startrow != row && is_rtl) || (endrow != row && !is_rtl)) {
3143                         p.pain->fillRectangle(p.xo + int(tmpx),
3144                                 p.yo, int(p.bv->workWidth() - tmpx),
3145                                 row->height(), LColor::selection);
3146                 }
3147         }
3148 }
3149
3150
3151 void LyXText::paintRowAppendix(DrawRowParams & p)
3152 {
3153         // FIXME: can be just p.width ?
3154         int const ww = p.bv->workWidth();
3155         Paragraph * firstpar = p.row->par();
3156
3157         if (firstpar->params().appendix()) {
3158                 p.pain->line(1, p.yo, 1, p.yo + p.row->height(), LColor::appendixline);
3159                 p.pain->line(ww - 2, p.yo, ww - 2, p.yo + p.row->height(), LColor::appendixline);
3160         }
3161 }
3162
3163
3164 void LyXText::paintRowDepthBar(DrawRowParams & p)
3165 {
3166         Paragraph::depth_type const depth = p.row->par()->getDepth();
3167
3168         if (depth <= 0)
3169                 return;
3170
3171         Paragraph::depth_type prev_depth = 0;
3172         if (p.row->previous())
3173                 prev_depth = p.row->previous()->par()->getDepth();
3174         Paragraph::depth_type next_depth = 0;
3175         if (p.row->next())
3176                 next_depth = p.row->next()->par()->getDepth();
3177
3178         for (Paragraph::depth_type i = 1; i <= depth; ++i) {
3179                 int const x = (LYX_PAPER_MARGIN / 5) * i + p.xo;
3180                 int const h = p.yo + p.row->height() - 1 - (i - next_depth - 1) * 3;
3181
3182                 p.pain->line(x, p.yo, x, h, LColor::depthbar);
3183
3184                 int const w = LYX_PAPER_MARGIN / 5;
3185
3186                 if (i > prev_depth) {
3187                         p.pain->fillRectangle(x, p.yo, w, 2, LColor::depthbar);
3188                 }
3189                 if (i > next_depth) {
3190                         p.pain->fillRectangle(x, h, w, 2, LColor::depthbar);
3191                 }
3192         }
3193 }
3194
3195
3196 int LyXText::getLengthMarkerHeight(BufferView * bv, VSpace const & vsp) const
3197 {
3198         int const arrow_size = 4;
3199         int const space_size = int(vsp.inPixels(bv));
3200
3201         if (vsp.kind() != VSpace::LENGTH) {
3202                 return space_size;
3203         }
3204
3205         LyXFont font;
3206         font.decSize();
3207         int const min_size = std::max(3 * arrow_size,
3208                                       lyxfont::maxAscent(font)
3209                                       + lyxfont::maxDescent(font));
3210
3211         if (vsp.length().len().value() < 0.0)
3212                 return min_size;
3213         else
3214                 return std::max(min_size, space_size);
3215 }
3216
3217
3218 int LyXText::drawLengthMarker(DrawRowParams & p, string const & prefix,
3219                               VSpace const & vsp, int start)
3220 {
3221         int const arrow_size = 4;
3222         int const size = getLengthMarkerHeight(p.bv, vsp);
3223         int const end = start + size;
3224
3225         // the label to display (if any)
3226         string str;
3227         // y-values for top arrow
3228         int ty1, ty2;
3229         // y-values for bottom arrow
3230         int by1, by2;
3231         switch (vsp.kind()) {
3232         case VSpace::LENGTH:
3233         {
3234                 str = prefix + " (" + vsp.asLyXCommand() + ")";
3235                 // adding or removing space
3236                 bool const added = !(vsp.length().len().value() < 0.0);
3237                 ty1 = added ? (start + arrow_size) : start;
3238                 ty2 = added ? start : (start + arrow_size);
3239                 by1 = added ? (end - arrow_size) : end;
3240                 by2 = added ? end : (end - arrow_size);
3241                 break;
3242         }
3243         case VSpace:: VFILL:
3244                 str = prefix + " (vertical fill)";
3245                 ty1 = ty2 = start;
3246                 by1 = by2 = end;
3247                 break;
3248         default:
3249                 // nothing to draw here
3250                 return size;
3251         }
3252
3253         int const leftx = p.xo + leftMargin(p.bv, p.row);
3254         int const midx = leftx + arrow_size;
3255         int const rightx = midx + arrow_size;
3256
3257         // first the string
3258         int w = 0;
3259         int a = 0;
3260         int d = 0;
3261
3262         LyXFont font;
3263         font.setColor(LColor::added_space).decSize();
3264         lyxfont::rectText(str, font, w, a, d);
3265
3266         p.pain->rectText(leftx + 2 * arrow_size + 5,
3267                          start + ((end - start) / 2) + d,
3268                          str, font,
3269                          backgroundColor(),
3270                          backgroundColor());
3271
3272         // top arrow
3273         p.pain->line(leftx, ty1, midx, ty2, LColor::added_space);
3274         p.pain->line(midx, ty2, rightx, ty1, LColor::added_space);
3275
3276         // bottom arrow
3277         p.pain->line(leftx, by1, midx, by2, LColor::added_space);
3278         p.pain->line(midx, by2, rightx, by1, LColor::added_space);
3279
3280         // joining line
3281         p.pain->line(midx, ty2, midx, by2, LColor::added_space);
3282
3283         return size;
3284 }
3285
3286
3287 void LyXText::paintFirstRow(DrawRowParams & p)
3288 {
3289         Paragraph * par = p.row->par();
3290         ParagraphParameters const & parparams = par->params();
3291
3292         // start of appendix?
3293         if (parparams.startOfAppendix()) {
3294                 p.pain->line(1, p.yo, p.width - 2, p.yo, LColor::appendixline);
3295         }
3296
3297         int y_top = 0;
3298
3299         // think about the margins
3300         if (!p.row->previous() && bv_owner)
3301                 y_top += LYX_PAPER_MARGIN;
3302
3303         // draw a top pagebreak
3304         if (parparams.pagebreakTop()) {
3305                 int const y = p.yo + y_top + 2*defaultHeight();
3306                 p.pain->line(p.xo, y, p.xo + p.width, y,
3307                         LColor::pagebreak, Painter::line_onoffdash);
3308
3309                 int w = 0;
3310                 int a = 0;
3311                 int d = 0;
3312
3313                 LyXFont pb_font;
3314                 pb_font.setColor(LColor::pagebreak).decSize();
3315                 lyxfont::rectText(_("Page Break (top)"), pb_font, w, a, d);
3316                 p.pain->rectText((p.width - w)/2, y + d,
3317                               _("Page Break (top)"), pb_font,
3318                               backgroundColor(),
3319                               backgroundColor());
3320                 y_top += 3 * defaultHeight();
3321         }
3322
3323         // draw the additional space if needed:
3324         y_top += drawLengthMarker(p, _("Space above"),
3325                                   parparams.spaceTop(), p.yo + y_top);
3326
3327         Buffer const * buffer = p.bv->buffer();
3328
3329         LyXLayout const & layout =
3330                 textclasslist.Style(buffer->params.textclass, par->getLayout());
3331
3332         // think about the parskip
3333         // some parskips VERY EASY IMPLEMENTATION
3334         if (buffer->params.paragraph_separation == BufferParams::PARSEP_SKIP) {
3335                 if (par->previous()) {
3336                         if (layout.latextype == LATEX_PARAGRAPH
3337                                 && !par->getDepth()) {
3338                                 y_top += buffer->params.getDefSkip().inPixels(p.bv);
3339                         } else {
3340                                 LyXLayout const & playout =
3341                                         textclasslist.Style(buffer->params.textclass,
3342                                                 par->previous()->getLayout());
3343                                 if (playout.latextype == LATEX_PARAGRAPH
3344                                         && !par->previous()->getDepth()) {
3345                                         // is it right to use defskip here, too? (AS)
3346                                         y_top += buffer->params.getDefSkip().inPixels(p.bv);
3347                                 }
3348                         }
3349                 }
3350         }
3351
3352         int const ww = p.bv->workWidth();
3353
3354         // draw a top line
3355         if (parparams.lineTop()) {
3356                 LyXFont font(LyXFont::ALL_SANE);
3357                 int const asc = lyxfont::ascent('x', getFont(buffer, par, 0));
3358
3359                 y_top += asc;
3360
3361                 int const w = (inset_owner ?  inset_owner->width(p.bv, font) : ww);
3362                 int const xp = static_cast<int>(inset_owner ? p.xo : 0);
3363                 p.pain->line(xp, p.yo + y_top, xp + w, p.yo + y_top,
3364                         LColor::topline, Painter::line_solid,
3365                         Painter::line_thick);
3366
3367                 y_top += asc;
3368         }
3369
3370         bool const is_rtl = p.row->par()->isRightToLeftPar(p.bv->buffer()->params);
3371
3372         // should we print a label?
3373         if (layout.labeltype >= LABEL_STATIC
3374             && (layout.labeltype != LABEL_STATIC
3375                 || layout.latextype != LATEX_ENVIRONMENT
3376                 || par->isFirstInSequence())) {
3377
3378                 LyXFont font = getLabelFont(buffer, par);
3379                 if (!par->getLabelstring().empty()) {
3380                         float x = p.x;
3381                         string const str = par->getLabelstring();
3382
3383                         // this is special code for the chapter layout. This is
3384                         // printed in an extra row and has a pagebreak at
3385                         // the top.
3386                         if (layout.labeltype == LABEL_COUNTER_CHAPTER) {
3387                                 if (buffer->params.secnumdepth >= 0) {
3388                                         float spacing_val = 1.0;
3389                                         if (!parparams.spacing().isDefault()) {
3390                                                 spacing_val = parparams.spacing().getValue();
3391                                         } else {
3392                                                 spacing_val = buffer->params.spacing.getValue();
3393                                         }
3394
3395                                         int const maxdesc =
3396                                                 int(lyxfont::maxDescent(font) * layout.spacing.getValue() * spacing_val)
3397                                                 + int(layout.parsep) * defaultHeight();
3398
3399                                         if (is_rtl) {
3400                                                 x = ww - leftMargin(p.bv, p.row) -
3401                                                         lyxfont::width(str, font);
3402                                         }
3403
3404                                         p.pain->text(int(x),
3405                                                 p.yo + p.row->baseline() -
3406                                                 p.row->ascent_of_text() - maxdesc,
3407                                                 str, font);
3408                                 }
3409                         } else {
3410                                 if (is_rtl) {
3411                                         x = ww - leftMargin(p.bv, p.row)
3412                                                 + lyxfont::width(layout.labelsep, font);
3413                                 } else {
3414                                         x = p.x - lyxfont::width(layout.labelsep, font)
3415                                                 - lyxfont::width(str, font);
3416                                 }
3417
3418                                 p.pain->text(int(x), p.yo + p.row->baseline(), str, font);
3419                         }
3420                 }
3421         // the labels at the top of an environment.
3422         // More or less for bibliography
3423         } else if (par->isFirstInSequence() &&
3424                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
3425                 layout.labeltype == LABEL_BIBLIO ||
3426                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
3427                 LyXFont font = getLabelFont(buffer, par);
3428                 if (!par->getLabelstring().empty()) {
3429                         string const str = par->getLabelstring();
3430                         float spacing_val = 1.0;
3431                         if (!parparams.spacing().isDefault()) {
3432                                 spacing_val = parparams.spacing().getValue();
3433                         } else {
3434                                 spacing_val = buffer->params.spacing.getValue();
3435                         }
3436
3437                         int maxdesc =
3438                                 int(lyxfont::maxDescent(font) * layout.spacing.getValue() * spacing_val
3439                                 + (layout.labelbottomsep * defaultHeight()));
3440
3441                         float x = p.x;
3442                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
3443                                 x = ((is_rtl ? leftMargin(p.bv, p.row) : p.x)
3444                                          + ww - rightMargin(buffer, p.row) ) / 2;
3445                                 x -= lyxfont::width(str, font) / 2;
3446                         } else if (is_rtl) {
3447                                 x = ww - leftMargin(p.bv, p.row) -
3448                                         lyxfont::width(str, font);
3449                         }
3450                         p.pain->text(int(x), p.yo + p.row->baseline()
3451                                   - p.row->ascent_of_text() - maxdesc,
3452                                   str, font);
3453                 }
3454         }
3455
3456         if (layout.labeltype == LABEL_BIBLIO && par->bibkey) {
3457                 LyXFont font = getLayoutFont(buffer, par);
3458                 float x;
3459                 if (is_rtl) {
3460                         x = ww - leftMargin(p.bv, p.row)
3461                                 + lyxfont::width(layout.labelsep, font);
3462                 } else {
3463                         x = p.x - lyxfont::width(layout.labelsep, font)
3464                                 - par->bibkey->width(p.bv, font);
3465                 }
3466                 par->bibkey->draw(p.bv, font, p.yo + p.row->baseline(), x, p.cleared);
3467         }
3468 }
3469
3470
3471 void LyXText::paintLastRow(DrawRowParams & p)
3472 {
3473         Paragraph * par = p.row->par();
3474         ParagraphParameters const & parparams = par->params();
3475         int y_bottom = p.row->height() - 1;
3476
3477         // think about the margins
3478         if (!p.row->next() && bv_owner)
3479                 y_bottom -= LYX_PAPER_MARGIN;
3480
3481         int const ww = p.bv->workWidth();
3482
3483         // draw a bottom pagebreak
3484         if (parparams.pagebreakBottom()) {
3485                 LyXFont pb_font;
3486                 pb_font.setColor(LColor::pagebreak).decSize();
3487                 int const y = p.yo + y_bottom - 2 * defaultHeight();
3488
3489                 p.pain->line(p.xo, y, p.xo + p.width, y, LColor::pagebreak,
3490                              Painter::line_onoffdash);
3491
3492                 int w = 0;
3493                 int a = 0;
3494                 int d = 0;
3495                 lyxfont::rectText(_("Page Break (bottom)"), pb_font, w, a, d);
3496                 p.pain->rectText((ww - w) / 2, y + d,
3497                         _("Page Break (bottom)"),
3498                         pb_font, backgroundColor(), backgroundColor());
3499
3500                 y_bottom -= 3 * defaultHeight();
3501         }
3502
3503         // draw the additional space if needed:
3504         int const height =  getLengthMarkerHeight(p.bv,
3505                                                   parparams.spaceBottom());
3506         y_bottom -= drawLengthMarker(p, _("Space below"),
3507                                      parparams.spaceBottom(),
3508                                      p.yo + y_bottom - height);
3509
3510         Buffer const * buffer = p.bv->buffer();
3511
3512         // draw a bottom line
3513         if (parparams.lineBottom()) {
3514                 LyXFont font(LyXFont::ALL_SANE);
3515                 int const asc = lyxfont::ascent('x',
3516                         getFont(buffer, par,
3517                         max(pos_type(0), par->size() - 1)));
3518
3519                 y_bottom -= asc;
3520
3521                 int const w = (inset_owner ?  inset_owner->width(p.bv, font) : ww);
3522                 int const xp = static_cast<int>(inset_owner ? p.xo : 0);
3523                 int const y = p.yo + y_bottom;
3524                 p.pain->line(xp, y, xp + w, y, LColor::topline, Painter::line_solid,
3525                           Painter::line_thick);
3526
3527                 y_bottom -= asc;
3528         }
3529
3530         bool const is_rtl = p.row->par()->isRightToLeftPar(p.bv->buffer()->params);
3531         int const endlabel = par->getEndLabel(buffer->params);
3532
3533         // draw an endlabel
3534         switch (endlabel) {
3535         case END_LABEL_BOX:
3536         case END_LABEL_FILLED_BOX:
3537         {
3538                 LyXFont const font = getLabelFont(buffer, par);
3539                 int const size = int(0.75 * lyxfont::maxAscent(font));
3540                 int const y = (p.yo + p.row->baseline()) - size;
3541                 int x = is_rtl ? LYX_PAPER_MARGIN : ww - LYX_PAPER_MARGIN - size;
3542
3543                 if (p.row->fill() <= size)
3544                         x += (size - p.row->fill() + 1) * (is_rtl ? -1 : 1);
3545
3546                 if (endlabel == END_LABEL_BOX) {
3547                         p.pain->rectangle(x, y, size, size, LColor::eolmarker);
3548                 } else {
3549                         p.pain->fillRectangle(x, y, size, size,
3550                                               LColor::eolmarker);
3551                 }
3552                 break;
3553         }
3554         case END_LABEL_STATIC:
3555         {
3556                 LyXFont font(LyXFont::ALL_SANE);
3557                 LyXTextClass::LayoutList::size_type layout = par->getLayout();
3558                 string const str = textclasslist.
3559                         Style(buffer->params.textclass, layout).endlabelstring();
3560                 font = getLabelFont(buffer, par);
3561                 int const x = is_rtl ?
3562                         int(p.x) - lyxfont::width(str, font)
3563                         : ww - rightMargin(buffer, p.row) - p.row->fill();
3564                 p.pain->text(x, p.yo + p.row->baseline(), str, font);
3565                 break;
3566         }
3567         case END_LABEL_NO_LABEL:
3568                 break;
3569         }
3570 }
3571
3572 void LyXText::paintRowText(DrawRowParams & p)
3573 {
3574         Paragraph * par = p.row->par();
3575         Buffer const * buffer = p.bv->buffer();
3576
3577         pos_type const last = rowLastPrintable(p.row);
3578         pos_type main_body =
3579                 beginningOfMainBody(buffer, par);
3580         if (main_body > 0 &&
3581                 (main_body - 1 > last ||
3582                 !par->isLineSeparator(main_body - 1))) {
3583                 main_body = 0;
3584         }
3585
3586         LyXLayout const & layout =
3587                 textclasslist.Style(buffer->params.textclass, par->getLayout());
3588
3589         pos_type vpos = p.row->pos();
3590         while (vpos <= last) {
3591                 pos_type pos = vis2log(vpos);
3592                 if (main_body > 0 && pos == main_body - 1) {
3593                         int const lwidth = lyxfont::width(layout.labelsep,
3594                                 getLabelFont(buffer, par));
3595
3596                         p.x += p.label_hfill + lwidth
3597                                 - singleWidth(p.bv, par, main_body - 1);
3598                 }
3599
3600                 if (par->isHfill(pos)) {
3601                         p.x += 1;
3602
3603                         int const y0 = p.yo + p.row->baseline();
3604                         int const y1 = y0 - defaultHeight() / 2;
3605
3606                         p.pain->line(int(p.x), y1, int(p.x), y0,
3607                                      LColor::added_space);
3608
3609                         if (hfillExpansion(buffer, p.row, pos)) {
3610                                 int const y2 = (y0 + y1) / 2;
3611
3612                                 if (pos >= main_body) {
3613                                         p.pain->line(int(p.x), y2,
3614                                                   int(p.x + p.hfill), y2,
3615                                                   LColor::added_space,
3616                                                   Painter::line_onoffdash);
3617                                         p.x += p.hfill;
3618                                 } else {
3619                                         p.pain->line(int(p.x), y2,
3620                                                   int(p.x + p.label_hfill), y2,
3621                                                   LColor::added_space,
3622                                                   Painter::line_onoffdash);
3623                                         p.x += p.label_hfill;
3624                                 }
3625                                 p.pain->line(int(p.x), y1,
3626                                              int(p.x), y0,
3627                                              LColor::added_space);
3628                         }
3629                         p.x += 2;
3630                         ++vpos;
3631                 } else if (par->isSeparator(pos)) {
3632                         p.x += singleWidth(p.bv, par, pos);
3633                         if (pos >= main_body)
3634                                 p.x += p.separator;
3635                         ++vpos;
3636                 } else {
3637                         draw(p, vpos);
3638                 }
3639         }
3640 }
3641
3642
3643 void LyXText::getVisibleRow(BufferView * bv, int y_offset, int x_offset,
3644                             Row * row, int y, bool cleared)
3645 {
3646         if (row->height() <= 0) {
3647                 lyxerr << "LYX_ERROR: row.height: "
3648                        << row->height() << endl;
3649                 return;
3650         }
3651
3652         DrawRowParams p;
3653
3654         // set up drawing parameters
3655         p.bv = bv;
3656         p.pain = &bv->painter();
3657         p.row = row;
3658         p.xo = x_offset;
3659         p.yo = y_offset;
3660         prepareToPrint(bv, row, p.x, p.separator, p.hfill, p.label_hfill);
3661         if (inset_owner && (p.x < 0))
3662                 p.x = 0;
3663         p.x += p.xo;
3664         p.y = y;
3665         p.width = inset_owner ? inset_owner->textWidth(bv, true) : bv->workWidth();
3666         p.cleared = cleared;
3667
3668         // start painting
3669
3670         // clear to background if necessary
3671         p.cleared = paintRowBackground(p);
3672
3673         // paint the selection background
3674         if (selection.set()) {
3675                 paintRowSelection(p);
3676         }
3677
3678         // vertical lines for appendix
3679         paintRowAppendix(p);
3680
3681         // environment depth brackets
3682         paintRowDepthBar(p);
3683
3684         // draw any stuff wanted for a first row of a paragraph
3685         if (!row->pos()) {
3686                 paintFirstRow(p);
3687         }
3688
3689         // draw any stuff wanted for the last row of a paragraph
3690         if (!row->next() || (row->next()->par() != row->par())) {
3691                 paintLastRow(p);
3692         }
3693
3694         // paint text
3695         paintRowText(p);
3696 }
3697
3698
3699 int LyXText::defaultHeight() const
3700 {
3701         LyXFont font(LyXFont::ALL_SANE);
3702         return int(lyxfont::maxAscent(font) + lyxfont::maxDescent(font) * 1.5);
3703 }
3704
3705
3706 /* returns the column near the specified x-coordinate of the row
3707 * x is set to the real beginning of this column  */
3708 pos_type
3709 LyXText::getColumnNearX(BufferView * bview, Row * row, int & x,
3710                         bool & boundary) const
3711 {
3712         float tmpx = 0.0;
3713         float fill_separator;
3714         float fill_hfill;
3715         float fill_label_hfill;
3716
3717         prepareToPrint(bview, row, tmpx, fill_separator,
3718                        fill_hfill, fill_label_hfill);
3719
3720         pos_type vc = row->pos();
3721         pos_type last = rowLastPrintable(row);
3722         pos_type c = 0;
3723         LyXLayout const & layout =
3724                 textclasslist.Style(bview->buffer()->params.textclass,
3725                                     row->par()->getLayout());
3726         bool left_side = false;
3727
3728         pos_type main_body = beginningOfMainBody(bview->buffer(), row->par());
3729         float last_tmpx = tmpx;
3730
3731         if (main_body > 0 &&
3732             (main_body - 1 > last ||
3733              !row->par()->isLineSeparator(main_body - 1)))
3734                 main_body = 0;
3735
3736         while (vc <= last && tmpx <= x) {
3737                 c = vis2log(vc);
3738                 last_tmpx = tmpx;
3739                 if (main_body > 0 && c == main_body-1) {
3740                         tmpx += fill_label_hfill +
3741                                 lyxfont::width(layout.labelsep,
3742                                                getLabelFont(bview->buffer(), row->par()));
3743                         if (row->par()->isLineSeparator(main_body - 1))
3744                                 tmpx -= singleWidth(bview, row->par(), main_body-1);
3745                 }
3746
3747                 if (hfillExpansion(bview->buffer(), row, c)) {
3748                         x += singleWidth(bview, row->par(), c);
3749                         if (c >= main_body)
3750                                 tmpx += fill_hfill;
3751                         else
3752                                 tmpx += fill_label_hfill;
3753                 }
3754                 else if (row->par()->isSeparator(c)) {
3755                         tmpx += singleWidth(bview, row->par(), c);
3756                         if (c >= main_body)
3757                                 tmpx+= fill_separator;
3758                 } else
3759                         tmpx += singleWidth(bview, row->par(), c);
3760                 ++vc;
3761         }
3762
3763         if ((tmpx + last_tmpx) / 2 > x) {
3764                 tmpx = last_tmpx;
3765                 left_side = true;
3766         }
3767
3768         if (vc > last + 1)  // This shouldn't happen.
3769                 vc = last + 1;
3770
3771         boundary = false;
3772         bool const lastrow = lyxrc.rtl_support // This is not needed, but gives
3773                                          // some speedup if rtl_support=false
3774                 && (!row->next() || row->next()->par() != row->par());
3775         bool const rtl = (lastrow)
3776                 ? row->par()->isRightToLeftPar(bview->buffer()->params)
3777                 : false; // If lastrow is false, we don't need to compute
3778                          // the value of rtl.
3779
3780         if (row->pos() > last)  // Row is empty?
3781                 c = row->pos();
3782         else if (lastrow &&
3783                  ( ( rtl &&  left_side && vc == row->pos() && x < tmpx - 5) ||
3784                    (!rtl && !left_side && vc == last + 1   && x > tmpx + 5) ))
3785                 c = last + 1;
3786         else if (vc == row->pos()) {
3787                 c = vis2log(vc);
3788                 if (bidi_level(c) % 2 == 1)
3789                         ++c;
3790         } else {
3791                 c = vis2log(vc - 1);
3792                 bool const rtl = (bidi_level(c) % 2 == 1);
3793                 if (left_side == rtl) {
3794                         ++c;
3795                         boundary = isBoundary(bview->buffer(), row->par(), c);
3796                 }
3797         }
3798
3799         if (row->pos() <= last && c > last
3800             && row->par()->isNewline(last)) {
3801                 if (bidi_level(last) % 2 == 0)
3802                         tmpx -= singleWidth(bview, row->par(), last);
3803                 else
3804                         tmpx += singleWidth(bview, row->par(), last);
3805                 c = last;
3806         }
3807
3808         c -= row->pos();
3809         x = int(tmpx);
3810         return c;
3811 }
3812
3813
3814 // returns pointer to a specified row
3815 Row * LyXText::getRow(Paragraph * par, pos_type pos, int & y) const
3816 {
3817         if (!firstrow)
3818                 return 0;
3819
3820         Row * tmprow = firstrow;
3821         y = 0;
3822
3823         // find the first row of the specified paragraph
3824         while (tmprow->next() && tmprow->par() != par) {
3825                 y += tmprow->height();
3826                 tmprow = tmprow->next();
3827         }
3828
3829         // now find the wanted row
3830         while (tmprow->pos() < pos
3831                && tmprow->next()
3832                && tmprow->next()->par() == par
3833                && tmprow->next()->pos() <= pos) {
3834                 y += tmprow->height();
3835                 tmprow = tmprow->next();
3836         }
3837
3838         return tmprow;
3839 }
3840
3841
3842 Row * LyXText::getRowNearY(int & y) const
3843 {
3844         // If possible we should optimize this method. (Lgb)
3845         Row * tmprow = firstrow;
3846         int tmpy = 0;
3847
3848         while (tmprow->next() && tmpy + tmprow->height() <= y) {
3849                 tmpy += tmprow->height();
3850                 tmprow = tmprow->next();
3851         }
3852
3853         y = tmpy;   // return the real y
3854         return tmprow;
3855 }
3856
3857
3858 int LyXText::getDepth() const
3859 {
3860         return cursor.par()->getDepth();
3861 }