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