src/text.C

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