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