src/text.C

   1 /**
   2  * \file src/text.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author Lars Gullik Bjønnes
   8  * \author Jean-Marc Lasgouttes
   9  * \author John Levon
  10  * \author André Pönitz
  11  * \author Dekel Tsur
  12  * \author Jürgen Vigna
  13  *
  14  * Full author contact details are available in file CREDITS.
  15  */
  16
  17 #include <config.h>
  18
  19 #include "lyxtext.h"
  20
  21 #include "buffer.h"
  22 #include "bufferparams.h"
  23 #include "BufferView.h"
  24 #include "debug.h"
  25 #include "encoding.h"
  26 #include "funcrequest.h"
  27 #include "gettext.h"
  28 #include "language.h"
  29 #include "LColor.h"
  30 #include "lyxlength.h"
  31 #include "lyxrc.h"
  32 #include "lyxrow.h"
  33 #include "lyxrow_funcs.h"
  34 #include "metricsinfo.h"
  35 #include "paragraph.h"
  36 #include "paragraph_funcs.h"
  37 #include "ParagraphParameters.h"
  38 #include "rowpainter.h"
  39 #include "text_funcs.h"
  40 #include "undo.h"
  41 #include "vspace.h"
  42 #include "WordLangTuple.h"
  43
  44 #include "frontends/font_metrics.h"
  45 #include "frontends/LyXView.h"
  46
  47 #include "insets/insettext.h"
  48
  49 #include "support/lstrings.h"
  50 #include "support/textutils.h"
  51
  52 using bv_funcs::number;
  53
  54 using lyx::pos_type;
  55 using lyx::word_location;
  56
  57 using lyx::support::contains;
  58 using lyx::support::lowercase;
  59 using lyx::support::uppercase;
  60
  61 using std::max;
  62 using std::endl;
  63 using std::string;
  64
  65
  66 /// top, right, bottom pixel margin
  67 extern int const PAPER_MARGIN = 20;
  68 /// margin for changebar
  69 extern int const CHANGEBAR_MARGIN = 10;
  70 /// left margin
  71 extern int const LEFT_MARGIN = PAPER_MARGIN + CHANGEBAR_MARGIN;
  72
  73
  74
  75 int bibitemMaxWidth(BufferView *, LyXFont const &);
  76
  77
  78 BufferView * LyXText::bv()
  79 {
  80         BOOST_ASSERT(bv_owner != 0);
  81         return bv_owner;
  82 }
  83
  84
  85 BufferView * LyXText::bv() const
  86 {
  87         BOOST_ASSERT(bv_owner != 0);
  88         return bv_owner;
  89 }
  90
  91
  92 void LyXText::updateRowPositions()
  93 {
  94         ParagraphList::iterator pit = ownerParagraphs().begin();
  95         ParagraphList::iterator end = ownerParagraphs().end();
  96         for (height = 0; pit != end; ++pit) {
  97                 pit->y = height;
  98                 height += pit->height;
  99         }
 100 }
 101
 102
 103 int LyXText::workWidth() const
 104 {
 105         return inset_owner ? inset_owner->textWidth() : bv()->workWidth();
 106 }
 107
 108
 109 int LyXText::getRealCursorX() const
 110 {
 111         int x = cursor.x();
 112         if (the_locking_inset && the_locking_inset->getLyXText(bv()) != this)
 113                 x = the_locking_inset->getLyXText(bv())->getRealCursorX();
 114         return x;
 115 }
 116
 117
 118 #warning FIXME  This function seems to belong outside of LyxText.
 119 unsigned char LyXText::transformChar(unsigned char c, Paragraph const & par,
 120                                      pos_type pos) const
 121 {
 122         if (!Encodings::is_arabic(c))
 123                 if (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 && IsDigit(c))
 124                         return c + (0xb0 - '0');
 125                 else
 126                         return c;
 127
 128         unsigned char const prev_char = pos > 0 ? par.getChar(pos - 1) : ' ';
 129         unsigned char next_char = ' ';
 130
 131         pos_type const par_size = par.size();
 132
 133         for (pos_type i = pos + 1; i < par_size; ++i) {
 134                 unsigned char const par_char = par.getChar(i);
 135                 if (!Encodings::IsComposeChar_arabic(par_char)) {
 136                         next_char = par_char;
 137                         break;
 138                 }
 139         }
 140
 141         if (Encodings::is_arabic(next_char)) {
 142                 if (Encodings::is_arabic(prev_char) &&
 143                         !Encodings::is_arabic_special(prev_char))
 144                         return Encodings::TransformChar(c, Encodings::FORM_MEDIAL);
 145                 else
 146                         return Encodings::TransformChar(c, Encodings::FORM_INITIAL);
 147         } else {
 148                 if (Encodings::is_arabic(prev_char) &&
 149                         !Encodings::is_arabic_special(prev_char))
 150                         return Encodings::TransformChar(c, Encodings::FORM_FINAL);
 151                 else
 152                         return Encodings::TransformChar(c, Encodings::FORM_ISOLATED);
 153         }
 154 }
 155
 156 // This is the comments that some of the warnings below refers to.
 157 // There are some issues in this file and I don't think they are
 158 // really related to the FIX_DOUBLE_SPACE patch. I'd rather think that
 159 // this is a problem that has been here almost from day one and that a
 160 // larger userbase with different access patters triggers the bad
 161 // behaviour. (segfaults.) What I think happen is: In several places
 162 // we store the paragraph in the current cursor and then moves the
 163 // cursor. This movement of the cursor will delete paragraph at the
 164 // old position if it is now empty. This will make the temporary
 165 // pointer to the old cursor paragraph invalid and dangerous to use.
 166 // And is some cases this will trigger a segfault. I have marked some
 167 // of the cases where this happens with a warning, but I am sure there
 168 // are others in this file and in text2.C. There is also a note in
 169 // Delete() that you should read. In Delete I store the paragraph->id
 170 // instead of a pointer to the paragraph. I am pretty sure this faulty
 171 // use of temporary pointers to paragraphs that might have gotten
 172 // invalidated (through a cursor movement) before they are used, are
 173 // the cause of the strange crashes we get reported often.
 174 //
 175 // It is very tiresom to change this code, especially when it is as
 176 // hard to read as it is. Help to fix all the cases where this is done
 177 // would be greately appreciated.
 178 //
 179 // Lgb
 180
 181 int LyXText::singleWidth(ParagraphList::iterator pit, pos_type pos) const
 182 {
 183         if (pos >= pit->size())
 184                 return 0;
 185
 186         char const c = pit->getChar(pos);
 187         LyXFont const & font = getFont(pit, pos);
 188         return singleWidth(pit, pos, c, font);
 189 }
 190
 191
 192 int LyXText::singleWidth(ParagraphList::iterator pit,
 193                          pos_type pos, char c, LyXFont const & font) const
 194 {
 195         if (pos >= pit->size()) {
 196                 lyxerr << "in singleWidth(), pos: " << pos << endl;
 197                 BOOST_ASSERT(false);
 198                 return 0;
 199         }
 200
 201
 202         // The most common case is handled first (Asger)
 203         if (IsPrintable(c)) {
 204                 if (!font.language()->RightToLeft()) {
 205                         if ((lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 206                              lyxrc.font_norm_type == LyXRC::ISO_10646_1)
 207                             && font.language()->lang() == "arabic") {
 208                                 if (Encodings::IsComposeChar_arabic(c))
 209                                         return 0;
 210                                 else
 211                                         c = transformChar(c, *pit, pos);
 212                         } else if (font.language()->lang() == "hebrew" &&
 213                                  Encodings::IsComposeChar_hebrew(c))
 214                                 return 0;
 215                 }
 216                 return font_metrics::width(c, font);
 217         }
 218
 219         if (c == Paragraph::META_INSET) {
 220                 InsetOld * tmpinset = pit->getInset(pos);
 221                 BOOST_ASSERT(tmpinset);
 222                 if (tmpinset->lyxCode() == InsetOld::HFILL_CODE) {
 223                         // Because of the representation as vertical lines
 224                         return 3;
 225                 }
 226                 return tmpinset->width();
 227         }
 228
 229         if (IsSeparatorChar(c))
 230                 c = ' ';
 231         return font_metrics::width(c, font);
 232 }
 233
 234
 235 lyx::pos_type LyXText::log2vis(lyx::pos_type pos) const
 236 {
 237         return (bidi_start == -1) ? pos : log2vis_list[pos - bidi_start];
 238 }
 239
 240
 241 lyx::pos_type LyXText::vis2log(lyx::pos_type pos) const
 242 {
 243         return (bidi_start == -1) ? pos : vis2log_list[pos - bidi_start];
 244 }
 245
 246
 247 lyx::pos_type LyXText::bidi_level(lyx::pos_type pos) const
 248 {
 249         return (bidi_start == -1) ? 0 : bidi_levels[pos - bidi_start];
 250 }
 251
 252
 253 bool LyXText::bidi_InRange(lyx::pos_type pos) const
 254 {
 255         return bidi_start == -1 || (bidi_start <= pos && pos <= bidi_end);
 256 }
 257
 258
 259 void LyXText::computeBidiTables(Paragraph const & par,
 260    Buffer const & buf, Row & row) const
 261 {
 262         bidi_same_direction = true;
 263         if (!lyxrc.rtl_support) {
 264                 bidi_start = -1;
 265                 return;
 266         }
 267
 268         InsetOld * inset = par.inInset();
 269         if (inset && inset->owner() &&
 270             inset->owner()->lyxCode() == InsetOld::ERT_CODE) {
 271                 bidi_start = -1;
 272                 return;
 273         }
 274
 275         bidi_start = row.pos();
 276         bidi_end = lastPos(par, row);
 277
 278         if (bidi_start > bidi_end) {
 279                 bidi_start = -1;
 280                 return;
 281         }
 282
 283         if (bidi_end + 2 - bidi_start >
 284             static_cast<pos_type>(log2vis_list.size())) {
 285                 pos_type new_size =
 286                         (bidi_end + 2 - bidi_start < 500) ?
 287                         500 : 2 * (bidi_end + 2 - bidi_start);
 288                 log2vis_list.resize(new_size);
 289                 vis2log_list.resize(new_size);
 290                 bidi_levels.resize(new_size);
 291         }
 292
 293         vis2log_list[bidi_end + 1 - bidi_start] = -1;
 294         log2vis_list[bidi_end + 1 - bidi_start] = -1;
 295
 296         BufferParams const & bufparams = buf.params();
 297         pos_type stack[2];
 298         bool const rtl_par = par.isRightToLeftPar(bufparams);
 299         int level = 0;
 300         bool rtl = false;
 301         bool rtl0 = false;
 302         pos_type const body_pos = par.beginningOfBody();
 303
 304         for (pos_type lpos = bidi_start; lpos <= bidi_end; ++lpos) {
 305                 bool is_space = par.isLineSeparator(lpos);
 306                 pos_type const pos =
 307                         (is_space && lpos + 1 <= bidi_end &&
 308                          !par.isLineSeparator(lpos + 1) &&
 309                          !par.isNewline(lpos + 1))
 310                         ? lpos + 1 : lpos;
 311                 LyXFont font = par.getFontSettings(bufparams, pos);
 312                 if (pos != lpos && 0 < lpos && rtl0 && font.isRightToLeft() &&
 313                     font.number() == LyXFont::ON &&
 314                     par.getFontSettings(bufparams, lpos - 1).number()
 315                     == LyXFont::ON) {
 316                         font = par.getFontSettings(bufparams, lpos);
 317                         is_space = false;
 318                 }
 319
 320                 bool new_rtl = font.isVisibleRightToLeft();
 321                 bool new_rtl0 = font.isRightToLeft();
 322                 int new_level;
 323
 324                 if (lpos == body_pos - 1
 325                     && row.pos() < body_pos - 1
 326                     && is_space) {
 327                         new_level = rtl_par ? 1 : 0;
 328                         new_rtl0 = rtl_par;
 329                         new_rtl = rtl_par;
 330                 } else if (new_rtl0)
 331                         new_level = new_rtl ? 1 : 2;
 332                 else
 333                         new_level = rtl_par ? 2 : 0;
 334
 335                 if (is_space && new_level >= level) {
 336                         new_level = level;
 337                         new_rtl = rtl;
 338                         new_rtl0 = rtl0;
 339                 }
 340
 341                 int new_level2 = new_level;
 342
 343                 if (level == new_level && rtl0 != new_rtl0) {
 344                         --new_level2;
 345                         log2vis_list[lpos - bidi_start] = rtl ? 1 : -1;
 346                 } else if (level < new_level) {
 347                         log2vis_list[lpos - bidi_start] = rtl ? -1 : 1;
 348                         if (new_level > rtl_par)
 349                                 bidi_same_direction = false;
 350                 } else
 351                         log2vis_list[lpos - bidi_start] = new_rtl ? -1 : 1;
 352                 rtl = new_rtl;
 353                 rtl0 = new_rtl0;
 354                 bidi_levels[lpos - bidi_start] = new_level;
 355
 356                 while (level > new_level2) {
 357                         pos_type old_lpos = stack[--level];
 358                         int delta = lpos - old_lpos - 1;
 359                         if (level % 2)
 360                                 delta = -delta;
 361                         log2vis_list[lpos - bidi_start] += delta;
 362                         log2vis_list[old_lpos - bidi_start] += delta;
 363                 }
 364                 while (level < new_level)
 365                         stack[level++] = lpos;
 366         }
 367
 368         while (level > 0) {
 369                 pos_type const old_lpos = stack[--level];
 370                 int delta = bidi_end - old_lpos;
 371                 if (level % 2)
 372                         delta = -delta;
 373                 log2vis_list[old_lpos - bidi_start] += delta;
 374         }
 375
 376         pos_type vpos = bidi_start - 1;
 377         for (pos_type lpos = bidi_start;
 378              lpos <= bidi_end; ++lpos) {
 379                 vpos += log2vis_list[lpos - bidi_start];
 380                 vis2log_list[vpos - bidi_start] = lpos;
 381                 log2vis_list[lpos - bidi_start] = vpos;
 382         }
 383 }
 384
 385
 386 // This method requires a previous call to ComputeBidiTables()
 387 bool LyXText::isBoundary(Buffer const & buf, Paragraph const & par,
 388                          pos_type pos) const
 389 {
 390         if (!lyxrc.rtl_support || pos == 0)
 391                 return false;
 392
 393         if (!bidi_InRange(pos - 1)) {
 394                 // This can happen if pos is the first char of a row.
 395                 // Returning false in this case is incorrect!
 396                 return false;
 397         }
 398
 399         bool const rtl = bidi_level(pos - 1) % 2;
 400         bool const rtl2 = bidi_InRange(pos)
 401                 ? bidi_level(pos) % 2
 402                 : par.isRightToLeftPar(buf.params());
 403         return rtl != rtl2;
 404 }
 405
 406
 407 bool LyXText::isBoundary(Buffer const & buf, Paragraph const & par,
 408                          pos_type pos, LyXFont const & font) const
 409 {
 410         if (!lyxrc.rtl_support)
 411                 return false;    // This is just for speedup
 412
 413         bool const rtl = font.isVisibleRightToLeft();
 414         bool const rtl2 = bidi_InRange(pos)
 415                 ? bidi_level(pos) % 2
 416                 : par.isRightToLeftPar(buf.params());
 417         return rtl != rtl2;
 418 }
 419
 420
 421 int LyXText::leftMargin(ParagraphList::iterator pit, Row const & row) const
 422 {
 423         LyXTextClass const & tclass =
 424                 bv()->buffer()->params().getLyXTextClass();
 425         LyXLayout_ptr const & layout = pit->layout();
 426
 427         string parindent = layout->parindent;
 428
 429         int x = LEFT_MARGIN;
 430
 431         x += font_metrics::signedWidth(tclass.leftmargin(), tclass.defaultfont());
 432
 433         // this is the way, LyX handles the LaTeX-Environments.
 434         // I have had this idea very late, so it seems to be a
 435         // later added hack and this is true
 436         if (!pit->getDepth()) {
 437                 if (pit->layout() == tclass.defaultLayout()) {
 438                         // find the previous same level paragraph
 439                         if (pit != ownerParagraphs().begin()) {
 440                                 ParagraphList::iterator newpit =
 441                                         depthHook(pit, ownerParagraphs(),
 442                                                   pit->getDepth());
 443                                 if (newpit == pit &&
 444                                     newpit->layout()->nextnoindent)
 445                                         parindent.erase();
 446                         }
 447                 }
 448         } else {
 449                 // find the next level paragraph
 450
 451                 ParagraphList::iterator newpar = outerHook(pit,
 452                                                            ownerParagraphs());
 453
 454                 // make a corresponding row. Needed to call leftMargin()
 455
 456                 // check wether it is a sufficent paragraph
 457                 if (newpar != ownerParagraphs().end() &&
 458                     newpar->layout()->isEnvironment()) {
 459                         x = leftMargin(newpar, Row(newpar->size()));
 460                 }
 461
 462                 if (newpar != ownerParagraphs().end() &&
 463                     pit->layout() == tclass.defaultLayout()) {
 464                         if (newpar->params().noindent())
 465                                 parindent.erase();
 466                         else {
 467                                 parindent = newpar->layout()->parindent;
 468                         }
 469
 470                 }
 471         }
 472
 473         LyXFont const labelfont = getLabelFont(pit);
 474         switch (layout->margintype) {
 475         case MARGIN_DYNAMIC:
 476                 if (!layout->leftmargin.empty()) {
 477                         x += font_metrics::signedWidth(layout->leftmargin,
 478                                                   tclass.defaultfont());
 479                 }
 480                 if (!pit->getLabelstring().empty()) {
 481                         x += font_metrics::signedWidth(layout->labelindent,
 482                                                   labelfont);
 483                         x += font_metrics::width(pit->getLabelstring(),
 484                                             labelfont);
 485                         x += font_metrics::width(layout->labelsep, labelfont);
 486                 }
 487                 break;
 488         case MARGIN_MANUAL:
 489                 x += font_metrics::signedWidth(layout->labelindent, labelfont);
 490                 // The width of an empty par, even with manual label, should be 0
 491                 if (!pit->empty() && row.pos() >= pit->beginningOfBody()) {
 492                         if (!pit->getLabelWidthString().empty()) {
 493                                 x += font_metrics::width(pit->getLabelWidthString(),
 494                                                labelfont);
 495                                 x += font_metrics::width(layout->labelsep, labelfont);
 496                         }
 497                 }
 498                 break;
 499         case MARGIN_STATIC:
 500                 x += font_metrics::signedWidth(layout->leftmargin, tclass.defaultfont()) * 4
 501                         / (pit->getDepth() + 4);
 502                 break;
 503         case MARGIN_FIRST_DYNAMIC:
 504                 if (layout->labeltype == LABEL_MANUAL) {
 505                         if (row.pos() >= pit->beginningOfBody()) {
 506                                 x += font_metrics::signedWidth(layout->leftmargin,
 507                                                           labelfont);
 508                         } else {
 509                                 x += font_metrics::signedWidth(layout->labelindent,
 510                                                           labelfont);
 511                         }
 512                 } else if (row.pos()
 513                            // Special case to fix problems with
 514                            // theorems (JMarc)
 515                            || (layout->labeltype == LABEL_STATIC
 516                                && layout->latextype == LATEX_ENVIRONMENT
 517                                && !isFirstInSequence(pit, ownerParagraphs()))) {
 518                         x += font_metrics::signedWidth(layout->leftmargin,
 519                                                   labelfont);
 520                 } else if (layout->labeltype != LABEL_TOP_ENVIRONMENT
 521                            && layout->labeltype != LABEL_BIBLIO
 522                            && layout->labeltype !=
 523                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 524                         x += font_metrics::signedWidth(layout->labelindent,
 525                                                   labelfont);
 526                         x += font_metrics::width(layout->labelsep, labelfont);
 527                         x += font_metrics::width(pit->getLabelstring(),
 528                                             labelfont);
 529                 }
 530                 break;
 531
 532         case MARGIN_RIGHT_ADDRESS_BOX:
 533         {
 534                 // ok, a terrible hack. The left margin depends on the widest
 535                 // row in this paragraph.
 536                 RowList::iterator rit = pit->rows.begin();
 537                 RowList::iterator end = pit->rows.end();
 538                 int minfill = rit->fill();
 539                 for ( ; rit != end; ++rit)
 540                         if (rit->fill() < minfill)
 541                                 minfill = rit->fill();
 542
 543                 x += font_metrics::signedWidth(layout->leftmargin,
 544                         tclass.defaultfont());
 545                 x += minfill;
 546         }
 547         break;
 548         }
 549
 550         if (workWidth() > 0 && !pit->params().leftIndent().zero()) {
 551                 LyXLength const len = pit->params().leftIndent();
 552                 int const tw = inset_owner ?
 553                         inset_owner->latexTextWidth(bv()) : workWidth();
 554                 x += len.inPixels(tw);
 555         }
 556
 557         LyXAlignment align;
 558
 559         if (pit->params().align() == LYX_ALIGN_LAYOUT)
 560                 align = layout->align;
 561         else
 562                 align = pit->params().align();
 563
 564         // set the correct parindent
 565         if (row.pos() == 0) {
 566                 if ((layout->labeltype == LABEL_NO_LABEL
 567                      || layout->labeltype == LABEL_TOP_ENVIRONMENT
 568                      || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 569                      || (layout->labeltype == LABEL_STATIC
 570                          && layout->latextype == LATEX_ENVIRONMENT
 571                          && !isFirstInSequence(pit, ownerParagraphs())))
 572                     && align == LYX_ALIGN_BLOCK
 573                     && !pit->params().noindent()
 574                         // in tabulars and ert paragraphs are never indented!
 575                         && (!pit->inInset() || !pit->inInset()->owner() ||
 576                                 (pit->inInset()->owner()->lyxCode() != InsetOld::TABULAR_CODE &&
 577                                  pit->inInset()->owner()->lyxCode() != InsetOld::ERT_CODE))
 578                     && (pit->layout() != tclass.defaultLayout() ||
 579                         bv()->buffer()->params().paragraph_separation ==
 580                         BufferParams::PARSEP_INDENT)) {
 581                         x += font_metrics::signedWidth(parindent,
 582                                                   tclass.defaultfont());
 583                 } else if (layout->labeltype == LABEL_BIBLIO) {
 584                         // ale970405 Right width for bibitems
 585                         x += bibitemMaxWidth(bv(), tclass.defaultfont());
 586                 }
 587         }
 588
 589         return x;
 590 }
 591
 592
 593 int LyXText::rightMargin(Paragraph const & par,
 594         Buffer const & buf, Row const &) const
 595 {
 596         LyXTextClass const & tclass = buf.params().getLyXTextClass();
 597         LyXLayout_ptr const & layout = par.layout();
 598
 599         return PAPER_MARGIN
 600                 + font_metrics::signedWidth(tclass.rightmargin(),
 601                                        tclass.defaultfont())
 602                 + font_metrics::signedWidth(layout->rightmargin,
 603                                        tclass.defaultfont())
 604                 * 4 / (par.getDepth() + 4);
 605 }
 606
 607
 608 int LyXText::labelEnd(ParagraphList::iterator pit, Row const & row) const
 609 {
 610         if (pit->layout()->margintype == MARGIN_MANUAL) {
 611                 Row tmprow = row;
 612                 tmprow.pos(pit->size());
 613                 // return the beginning of the body
 614                 return leftMargin(pit, tmprow);
 615         }
 616
 617         // LabelEnd is only needed if the layout
 618         // fills a flushleft label.
 619         return 0;
 620 }
 621
 622
 623 namespace {
 624
 625 // this needs special handling - only newlines count as a break point
 626 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
 627 {
 628         for (; i < par.size(); ++i)
 629                 if (par.isNewline(i))
 630                         return i;
 631
 632         return par.size();
 633 }
 634
 635 };
 636
 637
 638 pos_type LyXText::rowBreakPoint(ParagraphList::iterator pit,
 639         Row const & row) const
 640 {
 641         // maximum pixel width of a row.
 642         int width = workWidth() - rightMargin(*pit, *bv()->buffer(), row);
 643
 644         // inset->textWidth() returns -1 via workWidth(),
 645         // but why ?
 646         if (width < 0)
 647                 return pit->size();
 648
 649         LyXLayout_ptr const & layout = pit->layout();
 650
 651         if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX)
 652                 return addressBreakPoint(row.pos(), *pit);
 653
 654         pos_type const pos = row.pos();
 655         pos_type const body_pos = pit->beginningOfBody();
 656         pos_type const last = pit->size();
 657         pos_type point = last;
 658
 659         if (pos == last)
 660                 return last;
 661
 662         // Now we iterate through until we reach the right margin
 663         // or the end of the par, then choose the possible break
 664         // nearest that.
 665
 666         int const left = leftMargin(pit, row);
 667         int x = left;
 668
 669         // pixel width since last breakpoint
 670         int chunkwidth = 0;
 671
 672         pos_type i = pos;
 673
 674         // We re-use the font resolution for the entire font span when possible
 675         LyXFont font = getFont(pit, i);
 676         lyx::pos_type endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 677
 678         for (; i < last; ++i) {
 679                 if (pit->isNewline(i)) {
 680                         point = i;
 681                         break;
 682                 }
 683                 // Break before...
 684                 if (i + 1 < last) {
 685                         InsetOld * in = pit->getInset(i + 1);
 686                         if (in && in->display()) {
 687                                 point = i;
 688                                 break;
 689                         }
 690                         // ...and after.
 691                         in = pit->getInset(i);
 692                         if (in && in->display()) {
 693                                 point = i;
 694                                 break;
 695                         }
 696                 }
 697
 698                 char const c = pit->getChar(i);
 699                 if (i > endPosOfFontSpan) {
 700                         font = getFont(pit, i);
 701                         endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 702                 }
 703
 704                 int thiswidth;
 705
 706                 // add the auto-hfill from label end to the body
 707                 if (body_pos && i == body_pos) {
 708                         thiswidth = font_metrics::width(layout->labelsep, getLabelFont(pit));
 709                         if (pit->isLineSeparator(i - 1))
 710                                 thiswidth -= singleWidth(pit, i - 1);
 711                         int left_margin = labelEnd(pit, row);
 712                         if (thiswidth + x < left_margin)
 713                                 thiswidth = left_margin - x;
 714                         thiswidth += singleWidth(pit, i, c, font);
 715                 } else {
 716                         thiswidth = singleWidth(pit, i, c, font);
 717                 }
 718
 719                 x += thiswidth;
 720                 chunkwidth += thiswidth;
 721
 722                 InsetOld * in = pit->getInset(i);
 723
 724                 // break before a character that will fall off
 725                 // the right of the row
 726                 if (x >= width) {
 727                         // if no break before, break here
 728                         if (point == last || chunkwidth >= width - left) {
 729                                 if (pos < i) {
 730                                         point = i - 1;
 731                                         break;
 732                                 }
 733                         }
 734                 }
 735
 736                 if (!in || in->isChar()) {
 737                         // some insets are line separators too
 738                         if (pit->isLineSeparator(i)) {
 739                                 point = i;
 740                                 chunkwidth = 0;
 741                         }
 742                 }
 743         }
 744
 745         if (point == last && x >= width) {
 746                 // didn't find one, break at the point we reached the edge
 747                 point = i;
 748         } else if (i == last && x < width) {
 749                 // found one, but we fell off the end of the par, so prefer
 750                 // that.
 751                 point = last;
 752         }
 753
 754         // manual labels cannot be broken in LaTeX. But we
 755         // want to make our on-screen rendering of footnotes
 756         // etc. still break
 757         if (body_pos && point < body_pos)
 758                 point = body_pos - 1;
 759
 760         return point;
 761 }
 762
 763
 764 // returns the minimum space a row needs on the screen in pixel
 765 int LyXText::fill(ParagraphList::iterator pit, Row & row, int paper_width) const
 766 {
 767         if (paper_width < 0)
 768                 return 0;
 769
 770         int w;
 771         // get the pure distance
 772         pos_type const last = lastPos(*pit, row);
 773
 774         LyXLayout_ptr const & layout = pit->layout();
 775
 776         // special handling of the right address boxes
 777         if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX) {
 778                 int const tmpfill = row.fill();
 779                 row.fill(0); // the minfill in MarginLeft()
 780                 w = leftMargin(pit, row);
 781                 row.fill(tmpfill);
 782         } else
 783                 w = leftMargin(pit, row);
 784
 785         pos_type const body_pos = pit->beginningOfBody();
 786         pos_type i = row.pos();
 787
 788         if (! pit->empty() && i <= last) {
 789                 // We re-use the font resolution for the entire span when possible
 790                 LyXFont font = getFont(pit, i);
 791                 lyx::pos_type endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 792                 while (i <= last) {
 793                         if (body_pos > 0 && i == body_pos) {
 794                                 w += font_metrics::width(layout->labelsep, getLabelFont(pit));
 795                                 if (pit->isLineSeparator(i - 1))
 796                                         w -= singleWidth(pit, i - 1);
 797                                 int left_margin = labelEnd(pit, row);
 798                                 if (w < left_margin)
 799                                         w = left_margin;
 800                         }
 801                         char const c = pit->getChar(i);
 802                         if (IsPrintable(c) && i > endPosOfFontSpan) {
 803                                 // We need to get the next font
 804                                 font = getFont(pit, i);
 805                                 endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 806                         }
 807                         w += singleWidth(pit, i, c, font);
 808                         ++i;
 809                 }
 810         }
 811         if (body_pos > 0 && body_pos > last) {
 812                 w += font_metrics::width(layout->labelsep, getLabelFont(pit));
 813                 if (last >= 0 && pit->isLineSeparator(last))
 814                         w -= singleWidth(pit, last);
 815                 int const left_margin = labelEnd(pit, row);
 816                 if (w < left_margin)
 817                         w = left_margin;
 818         }
 819
 820         int const fill = paper_width - w - rightMargin(*pit, *bv()->buffer(), row);
 821
 822         // If this case happens, it means that our calculation
 823         // of the widths of the chars when we do rowBreakPoint()
 824         // went wrong for some reason. Typically in list bodies.
 825         // Things just about hobble on anyway, though you'll end
 826         // up with a "fill_separator" less than zero, which corresponds
 827         // to inter-word spacing being too small. Hopefully this problem
 828         // will die when the label hacks die.
 829         if (lyxerr.debugging() && fill < 0) {
 830                 lyxerr[Debug::GUI] << "Eek, fill() was < 0: " << fill
 831                         << " w " << w << " paper_width " << paper_width
 832                         << " right margin " << rightMargin(*pit, *bv()->buffer(), row) << endl;
 833         }
 834         return fill;
 835 }
 836
 837
 838 // returns the minimum space a manual label needs on the screen in pixel
 839 int LyXText::labelFill(ParagraphList::iterator pit, Row const & row) const
 840 {
 841         pos_type last = pit->beginningOfBody();
 842
 843         BOOST_ASSERT(last > 0);
 844
 845         // -1 because a label ends either with a space that is in the label,
 846         // or with the beginning of a footnote that is outside the label.
 847         --last;
 848
 849         // a separator at this end does not count
 850         if (pit->isLineSeparator(last))
 851                 --last;
 852
 853         int w = 0;
 854         pos_type i = row.pos();
 855         while (i <= last) {
 856                 w += singleWidth(pit, i);
 857                 ++i;
 858         }
 859
 860         int fill = 0;
 861         string const & labwidstr = pit->params().labelWidthString();
 862         if (!labwidstr.empty()) {
 863                 LyXFont const labfont = getLabelFont(pit);
 864                 int const labwidth = font_metrics::width(labwidstr, labfont);
 865                 fill = max(labwidth - w, 0);
 866         }
 867
 868         return fill;
 869 }
 870
 871
 872 LColor_color LyXText::backgroundColor() const
 873 {
 874         if (inset_owner)
 875                 return inset_owner->backgroundColor();
 876         else
 877                 return LColor::background;
 878 }
 879
 880
 881 void LyXText::setHeightOfRow(ParagraphList::iterator pit, Row & row)
 882 {
 883         // get the maximum ascent and the maximum descent
 884         double layoutasc = 0;
 885         double layoutdesc = 0;
 886         double tmptop = 0;
 887
 888         // ok, let us initialize the maxasc and maxdesc value.
 889         // Only the fontsize count. The other properties
 890         // are taken from the layoutfont. Nicer on the screen :)
 891         LyXLayout_ptr const & layout = pit->layout();
 892
 893         // as max get the first character of this row then it can increase but not
 894         // decrease the height. Just some point to start with so we don't have to
 895         // do the assignment below too often.
 896         LyXFont font = getFont(pit, row.pos());
 897         LyXFont::FONT_SIZE const tmpsize = font.size();
 898         font = getLayoutFont(pit);
 899         LyXFont::FONT_SIZE const size = font.size();
 900         font.setSize(tmpsize);
 901
 902         LyXFont labelfont = getLabelFont(pit);
 903
 904         double spacing_val = 1.0;
 905         if (!pit->params().spacing().isDefault())
 906                 spacing_val = pit->params().spacing().getValue();
 907         else
 908                 spacing_val = bv()->buffer()->params().spacing().getValue();
 909         //lyxerr << "spacing_val = " << spacing_val << endl;
 910
 911         int maxasc  = int(font_metrics::maxAscent(font) *
 912                           layout->spacing.getValue() * spacing_val);
 913         int maxdesc = int(font_metrics::maxDescent(font) *
 914                           layout->spacing.getValue() * spacing_val);
 915
 916         pos_type const pos_end = lastPos(*pit, row);
 917         int labeladdon = 0;
 918         int maxwidth = 0;
 919
 920         if (!pit->empty()) {
 921                 // We re-use the font resolution for the entire font span when possible
 922                 LyXFont font = getFont(pit, row.pos());
 923                 lyx::pos_type endPosOfFontSpan = pit->getEndPosOfFontSpan(row.pos());
 924
 925                 // Optimisation
 926                 Paragraph const & par = *pit;
 927
 928                 // Check if any insets are larger
 929                 for (pos_type pos = row.pos(); pos <= pos_end; ++pos) {
 930                         // Manual inlined optimised version of common case of
 931                         // "maxwidth += singleWidth(pit, pos);"
 932                         char const c = par.getChar(pos);
 933
 934                         if (IsPrintable(c)) {
 935                                 if (pos > endPosOfFontSpan) {
 936                                         // We need to get the next font
 937                                         font = getFont(pit, pos);
 938                                         endPosOfFontSpan = par.getEndPosOfFontSpan(pos);
 939                                 }
 940                                 if (! font.language()->RightToLeft()) {
 941                                         maxwidth += font_metrics::width(c, font);
 942                                 } else {
 943                                         // Fall-back to normal case
 944                                         maxwidth += singleWidth(pit, pos, c, font);
 945                                         // And flush font cache
 946                                         endPosOfFontSpan = 0;
 947                                 }
 948                         } else {
 949                                 // Special handling of insets - are any larger?
 950                                 if (par.isInset(pos)) {
 951                                         InsetOld const * tmpinset = par.getInset(pos);
 952                                         if (tmpinset) {
 953                                                 maxwidth += tmpinset->width();
 954                                                 maxasc = max(maxasc, tmpinset->ascent());
 955                                                 maxdesc = max(maxdesc, tmpinset->descent());
 956                                         }
 957                                 } else {
 958                                         // Fall-back to normal case
 959                                         maxwidth += singleWidth(pit, pos, c, font);
 960                                         // And flush font cache
 961                                         endPosOfFontSpan = 0;
 962                                 }
 963                         }
 964                 }
 965         }
 966
 967         // Check if any custom fonts are larger (Asger)
 968         // This is not completely correct, but we can live with the small,
 969         // cosmetic error for now.
 970         LyXFont::FONT_SIZE maxsize =
 971                 pit->highestFontInRange(row.pos(), pos_end, size);
 972         if (maxsize > font.size()) {
 973                 font.setSize(maxsize);
 974                 maxasc = max(maxasc, font_metrics::maxAscent(font));
 975                 maxdesc = max(maxdesc, font_metrics::maxDescent(font));
 976         }
 977
 978         // This is nicer with box insets:
 979         ++maxasc;
 980         ++maxdesc;
 981
 982         row.ascent_of_text(maxasc);
 983
 984         // is it a top line?
 985         if (!row.pos()) {
 986                 BufferParams const & bufparams = bv()->buffer()->params();
 987                 // some parksips VERY EASY IMPLEMENTATION
 988                 if (bv()->buffer()->params().paragraph_separation ==
 989                         BufferParams::PARSEP_SKIP)
 990                 {
 991                         if (layout->isParagraph()
 992                                 && pit->getDepth() == 0
 993                                 && pit != ownerParagraphs().begin())
 994                         {
 995                                 maxasc += bufparams.getDefSkip().inPixels(*bv());
 996                         } else if (pit != ownerParagraphs().begin() &&
 997                                    boost::prior(pit)->layout()->isParagraph() &&
 998                                    boost::prior(pit)->getDepth() == 0)
 999                         {
1000                                 // is it right to use defskip here too? (AS)
1001                                 maxasc += bufparams.getDefSkip().inPixels(*bv());
1002                         }
1003                 }
1004
1005                 // the top margin
1006                 if (pit == ownerParagraphs().begin() && !isInInset())
1007                         maxasc += PAPER_MARGIN;
1008
1009                 // add the vertical spaces, that the user added
1010                 maxasc += getLengthMarkerHeight(*bv(), pit->params().spaceTop());
1011
1012                 // do not forget the DTP-lines!
1013                 // there height depends on the font of the nearest character
1014                 if (pit->params().lineTop())
1015
1016                         maxasc += 2 * font_metrics::ascent('x', getFont(pit, 0));
1017                 // and now the pagebreaks
1018                 if (pit->params().pagebreakTop())
1019                         maxasc += 3 * defaultRowHeight();
1020
1021                 if (pit->params().startOfAppendix())
1022                         maxasc += 3 * defaultRowHeight();
1023
1024                 // This is special code for the chapter, since the label of this
1025                 // layout is printed in an extra row
1026                 if (layout->counter == "chapter" && bufparams.secnumdepth >= 0) {
1027                         float spacing_val = 1.0;
1028                         if (!pit->params().spacing().isDefault()) {
1029                                 spacing_val = pit->params().spacing().getValue();
1030                         } else {
1031                                 spacing_val = bufparams.spacing().getValue();
1032                         }
1033
1034                         labeladdon = int(font_metrics::maxDescent(labelfont) *
1035                                          layout->spacing.getValue() *
1036                                          spacing_val)
1037                                 + int(font_metrics::maxAscent(labelfont) *
1038                                       layout->spacing.getValue() *
1039                                       spacing_val);
1040                 }
1041
1042                 // special code for the top label
1043                 if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
1044                      || layout->labeltype == LABEL_BIBLIO
1045                      || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
1046                     && isFirstInSequence(pit, ownerParagraphs())
1047                     && !pit->getLabelstring().empty())
1048                 {
1049                         float spacing_val = 1.0;
1050                         if (!pit->params().spacing().isDefault()) {
1051                                 spacing_val = pit->params().spacing().getValue();
1052                         } else {
1053                                 spacing_val = bufparams.spacing().getValue();
1054                         }
1055
1056                         labeladdon = int(
1057                                 (font_metrics::maxAscent(labelfont) +
1058                                  font_metrics::maxDescent(labelfont)) *
1059                                   layout->spacing.getValue() *
1060                                   spacing_val
1061                                 + layout->topsep * defaultRowHeight()
1062                                 + layout->labelbottomsep * defaultRowHeight());
1063                 }
1064
1065                 // And now the layout spaces, for example before and after
1066                 // a section, or between the items of a itemize or enumerate
1067                 // environment.
1068
1069                 if (!pit->params().pagebreakTop()) {
1070                         ParagraphList::iterator prev =
1071                                 depthHook(pit, ownerParagraphs(),
1072                                           pit->getDepth());
1073                         if (prev != pit && prev->layout() == layout &&
1074                                 prev->getDepth() == pit->getDepth() &&
1075                                 prev->getLabelWidthString() == pit->getLabelWidthString())
1076                         {
1077                                 layoutasc = (layout->itemsep * defaultRowHeight());
1078                         } else if (pit != ownerParagraphs().begin() || row.pos() != 0) {
1079                                 tmptop = layout->topsep;
1080
1081                                 if (tmptop > 0)
1082                                         layoutasc = (tmptop * defaultRowHeight());
1083                         } else if (pit->params().lineTop()) {
1084                                 tmptop = layout->topsep;
1085
1086                                 if (tmptop > 0)
1087                                         layoutasc = (tmptop * defaultRowHeight());
1088                         }
1089
1090                         prev = outerHook(pit, ownerParagraphs());
1091                         if (prev != ownerParagraphs().end())  {
1092                                 maxasc += int(prev->layout()->parsep * defaultRowHeight());
1093                         } else if (pit != ownerParagraphs().begin()) {
1094                                 ParagraphList::iterator prior_pit = boost::prior(pit);
1095                                 if (prior_pit->getDepth() != 0 ||
1096                                     prior_pit->layout() == layout) {
1097                                         maxasc += int(layout->parsep * defaultRowHeight());
1098                                 }
1099                         }
1100                 }
1101         }
1102
1103         // is it a bottom line?
1104         if (row.end() == pit->size()) {
1105                 // the bottom margin
1106                 ParagraphList::iterator nextpit = boost::next(pit);
1107                 if (nextpit == ownerParagraphs().end() && !isInInset())
1108                         maxdesc += PAPER_MARGIN;
1109
1110                 // add the vertical spaces, that the user added
1111                 maxdesc += getLengthMarkerHeight(*bv(), pit->params().spaceBottom());
1112
1113                 // do not forget the DTP-lines!
1114                 // there height depends on the font of the nearest character
1115                 if (pit->params().lineBottom())
1116                         maxdesc += 2 * font_metrics::ascent('x',
1117                                         getFont(pit, max(pos_type(0), pit->size() - 1)));
1118
1119                 // and now the pagebreaks
1120                 if (pit->params().pagebreakBottom())
1121                         maxdesc += 3 * defaultRowHeight();
1122
1123                 // and now the layout spaces, for example before and after
1124                 // a section, or between the items of a itemize or enumerate
1125                 // environment
1126                 if (!pit->params().pagebreakBottom()
1127                     && nextpit != ownerParagraphs().end()) {
1128                         ParagraphList::iterator comparepit = pit;
1129                         float usual = 0;
1130                         float unusual = 0;
1131
1132                         if (comparepit->getDepth() > nextpit->getDepth()) {
1133                                 usual = (comparepit->layout()->bottomsep * defaultRowHeight());
1134                                 comparepit = depthHook(comparepit, ownerParagraphs(), nextpit->getDepth());
1135                                 if (comparepit->layout()!= nextpit->layout()
1136                                         || nextpit->getLabelWidthString() !=
1137                                         comparepit->getLabelWidthString())
1138                                 {
1139                                         unusual = (comparepit->layout()->bottomsep * defaultRowHeight());
1140                                 }
1141                                 if (unusual > usual)
1142                                         layoutdesc = unusual;
1143                                 else
1144                                         layoutdesc = usual;
1145                         } else if (comparepit->getDepth() ==  nextpit->getDepth()) {
1146
1147                                 if (comparepit->layout() != nextpit->layout()
1148                                         || nextpit->getLabelWidthString() !=
1149                                         comparepit->getLabelWidthString())
1150                                         layoutdesc = int(comparepit->layout()->bottomsep * defaultRowHeight());
1151                         }
1152                 }
1153         }
1154
1155         // incalculate the layout spaces
1156         maxasc += int(layoutasc * 2 / (2 + pit->getDepth()));
1157         maxdesc += int(layoutdesc * 2 / (2 + pit->getDepth()));
1158
1159         row.height(maxasc + maxdesc + labeladdon);
1160         row.baseline(maxasc + labeladdon);
1161         row.top_of_text(row.baseline() - font_metrics::maxAscent(font));
1162
1163         row.width(maxwidth);
1164         if (inset_owner) {
1165                 width = max(0, workWidth());
1166                 RowList::iterator rit = firstRow();
1167                 RowList::iterator end = endRow();
1168                 ParagraphList::iterator it = ownerParagraphs().begin();
1169                 while (rit != end) {
1170                         if (rit->width() > width)
1171                                 width = rit->width();
1172                         nextRow(it, rit);
1173                 }
1174         }
1175 }
1176
1177
1178 void LyXText::breakParagraph(ParagraphList & paragraphs, char keep_layout)
1179 {
1180         // allow only if at start or end, or all previous is new text
1181         if (cursor.pos() && cursor.pos() != cursorPar()->size()
1182                 && cursorPar()->isChangeEdited(0, cursor.pos()))
1183                 return;
1184
1185         LyXTextClass const & tclass =
1186                 bv()->buffer()->params().getLyXTextClass();
1187         LyXLayout_ptr const & layout = cursorPar()->layout();
1188
1189         // this is only allowed, if the current paragraph is not empty or caption
1190         // and if it has not the keepempty flag active
1191         if (cursorPar()->empty() && !cursorPar()->allowEmpty()
1192            && layout->labeltype != LABEL_SENSITIVE)
1193                 return;
1194
1195         recUndo(cursor.par());
1196
1197         // Always break behind a space
1198         //
1199         // It is better to erase the space (Dekel)
1200         if (cursor.pos() < cursorPar()->size()
1201              && cursorPar()->isLineSeparator(cursor.pos()))
1202            cursorPar()->erase(cursor.pos());
1203
1204         // break the paragraph
1205         if (keep_layout)
1206                 keep_layout = 2;
1207         else
1208                 keep_layout = layout->isEnvironment();
1209
1210         // we need to set this before we insert the paragraph. IMO the
1211         // breakParagraph call should return a bool if it inserts the
1212         // paragraph before or behind and we should react on that one
1213         // but we can fix this in 1.3.0 (Jug 20020509)
1214         bool const isempty = (cursorPar()->allowEmpty() && cursorPar()->empty());
1215         ::breakParagraph(bv()->buffer()->params(), paragraphs, cursorPar(),
1216                          cursor.pos(), keep_layout);
1217
1218 #warning Trouble Point! (Lgb)
1219         // When ::breakParagraph is called from within an inset we must
1220         // ensure that the correct ParagraphList is used. Today that is not
1221         // the case and the Buffer::paragraphs is used. Not good. (Lgb)
1222         ParagraphList::iterator next_par = boost::next(cursorPar());
1223
1224         // well this is the caption hack since one caption is really enough
1225         if (layout->labeltype == LABEL_SENSITIVE) {
1226                 if (!cursor.pos())
1227                         // set to standard-layout
1228                         cursorPar()->applyLayout(tclass.defaultLayout());
1229                 else
1230                         // set to standard-layout
1231                         next_par->applyLayout(tclass.defaultLayout());
1232         }
1233
1234         // if the cursor is at the beginning of a row without prior newline,
1235         // move one row up!
1236         // This touches only the screen-update. Otherwise we would may have
1237         // an empty row on the screen
1238         if (cursor.pos() && cursorRow()->pos() == cursor.pos()
1239             && !cursorPar()->isNewline(cursor.pos() - 1))
1240         {
1241                 cursorLeft(bv());
1242         }
1243
1244         while (!next_par->empty() && next_par->isNewline(0))
1245                 next_par->erase(0);
1246
1247         updateCounters();
1248         redoParagraph(cursorPar());
1249         redoParagraph(next_par);
1250
1251         // This check is necessary. Otherwise the new empty paragraph will
1252         // be deleted automatically. And it is more friendly for the user!
1253         if (cursor.pos() || isempty)
1254                 setCursor(next_par, 0);
1255         else
1256                 setCursor(cursorPar(), 0);
1257 }
1258
1259
1260 // convenience function
1261 void LyXText::redoParagraph()
1262 {
1263         clearSelection();
1264         redoParagraph(cursorPar());
1265         setCursorIntern(cursor.par(), cursor.pos());
1266 }
1267
1268
1269 // insert a character, moves all the following breaks in the
1270 // same Paragraph one to the right and make a rebreak
1271 void LyXText::insertChar(char c)
1272 {
1273         recordUndo(Undo::INSERT, this, cursor.par(), cursor.par());
1274
1275         // When the free-spacing option is set for the current layout,
1276         // disable the double-space checking
1277
1278         bool const freeSpacing = cursorPar()->layout()->free_spacing ||
1279                 cursorPar()->isFreeSpacing();
1280
1281         if (lyxrc.auto_number) {
1282                 static string const number_operators = "+-/*";
1283                 static string const number_unary_operators = "+-";
1284                 static string const number_seperators = ".,:";
1285
1286                 if (current_font.number() == LyXFont::ON) {
1287                         if (!IsDigit(c) && !contains(number_operators, c) &&
1288                             !(contains(number_seperators, c) &&
1289                               cursor.pos() >= 1 &&
1290                               cursor.pos() < cursorPar()->size() &&
1291                               getFont(cursorPar(), cursor.pos()).number() == LyXFont::ON &&
1292                               getFont(cursorPar(), cursor.pos() - 1).number() == LyXFont::ON)
1293                            )
1294                                 number(bv()); // Set current_font.number to OFF
1295                 } else if (IsDigit(c) &&
1296                            real_current_font.isVisibleRightToLeft()) {
1297                         number(bv()); // Set current_font.number to ON
1298
1299                         if (cursor.pos() > 0) {
1300                                 char const c = cursorPar()->getChar(cursor.pos() - 1);
1301                                 if (contains(number_unary_operators, c) &&
1302                                     (cursor.pos() == 1 ||
1303                                      cursorPar()->isSeparator(cursor.pos() - 2) ||
1304                                      cursorPar()->isNewline(cursor.pos() - 2))
1305                                   ) {
1306                                         setCharFont(
1307                                                     cursorPar(),
1308                                                     cursor.pos() - 1,
1309                                                     current_font);
1310                                 } else if (contains(number_seperators, c) &&
1311                                            cursor.pos() >= 2 &&
1312                                            getFont(
1313                                                    cursorPar(),
1314                                                    cursor.pos() - 2).number() == LyXFont::ON) {
1315                                         setCharFont(
1316                                                     cursorPar(),
1317                                                     cursor.pos() - 1,
1318                                                     current_font);
1319                                 }
1320                         }
1321                 }
1322         }
1323
1324
1325         // First check, if there will be two blanks together or a blank at
1326         // the beginning of a paragraph.
1327         // I decided to handle blanks like normal characters, the main
1328         // difference are the special checks when calculating the row.fill
1329         // (blank does not count at the end of a row) and the check here
1330
1331         // The bug is triggered when we type in a description environment:
1332         // The current_font is not changed when we go from label to main text
1333         // and it should (along with realtmpfont) when we type the space.
1334         // CHECK There is a bug here! (Asger)
1335
1336         // store the current font.  This is because of the use of cursor
1337         // movements. The moving cursor would refresh the current font
1338         LyXFont realtmpfont = real_current_font;
1339         LyXFont rawtmpfont = current_font;
1340
1341         if (!freeSpacing && IsLineSeparatorChar(c)) {
1342                 if ((cursor.pos() > 0
1343                      && cursorPar()->isLineSeparator(cursor.pos() - 1))
1344                     || (cursor.pos() > 0
1345                         && cursorPar()->isNewline(cursor.pos() - 1))
1346                     || (cursor.pos() == 0)) {
1347                         static bool sent_space_message = false;
1348                         if (!sent_space_message) {
1349                                 if (cursor.pos() == 0)
1350                                         bv()->owner()->message(_("You cannot insert a space at the beginning of a paragraph. Please read the Tutorial."));
1351                                 else
1352                                         bv()->owner()->message(_("You cannot type two spaces this way. Please read the Tutorial."));
1353                                 sent_space_message = true;
1354                         }
1355                         charInserted();
1356                         return;
1357                 }
1358         }
1359
1360         // Here case LyXText::InsertInset already inserted the character
1361         if (c != Paragraph::META_INSET)
1362                 cursorPar()->insertChar(cursor.pos(), c);
1363
1364         setCharFont(cursorPar(), cursor.pos(), rawtmpfont);
1365
1366         current_font = rawtmpfont;
1367         real_current_font = realtmpfont;
1368         redoParagraph(cursorPar());
1369         setCursor(cursor.par(), cursor.pos() + 1, false, cursor.boundary());
1370
1371         charInserted();
1372 }
1373
1374
1375 void LyXText::charInserted()
1376 {
1377         // Here we could call finishUndo for every 20 characters inserted.
1378         // This is from my experience how emacs does it. (Lgb)
1379         static unsigned int counter;
1380         if (counter < 20) {
1381                 ++counter;
1382         } else {
1383                 finishUndo();
1384                 counter = 0;
1385         }
1386 }
1387
1388
1389 void LyXText::prepareToPrint(ParagraphList::iterator pit,
1390            RowList::iterator const rit) const
1391 {
1392         double w = rit->fill();
1393         double fill_hfill = 0;
1394         double fill_label_hfill = 0;
1395         double fill_separator = 0;
1396         double x = 0;
1397
1398         bool const is_rtl =
1399                 pit->isRightToLeftPar(bv()->buffer()->params());
1400         if (is_rtl)
1401                 x = workWidth() > 0 ? rightMargin(*pit, *bv()->buffer(), *rit) : 0;
1402         else
1403                 x = workWidth() > 0 ? leftMargin(pit, *rit) : 0;
1404
1405         // is there a manual margin with a manual label
1406         LyXLayout_ptr const & layout = pit->layout();
1407
1408         if (layout->margintype == MARGIN_MANUAL
1409             && layout->labeltype == LABEL_MANUAL) {
1410                 /// We might have real hfills in the label part
1411                 int nlh = numberOfLabelHfills(*pit, *rit);
1412
1413                 // A manual label par (e.g. List) has an auto-hfill
1414                 // between the label text and the body of the
1415                 // paragraph too.
1416                 // But we don't want to do this auto hfill if the par
1417                 // is empty.
1418                 if (!pit->empty())
1419                         ++nlh;
1420
1421                 if (nlh && !pit->getLabelWidthString().empty()) {
1422                         fill_label_hfill = labelFill(pit, *rit) / double(nlh);
1423                 }
1424         }
1425
1426         // are there any hfills in the row?
1427         int const nh = numberOfHfills(*pit, *rit);
1428
1429         if (nh) {
1430                 if (w > 0)
1431                         fill_hfill = w / nh;
1432         // we don't have to look at the alignment if it is ALIGN_LEFT and
1433         // if the row is already larger then the permitted width as then
1434         // we force the LEFT_ALIGN'edness!
1435         } else if (int(rit->width()) < workWidth()) {
1436                 // is it block, flushleft or flushright?
1437                 // set x how you need it
1438                 int align;
1439                 if (pit->params().align() == LYX_ALIGN_LAYOUT) {
1440                         align = layout->align;
1441                 } else {
1442                         align = pit->params().align();
1443                 }
1444                 InsetOld * inset = 0;
1445                 // ERT insets should always be LEFT ALIGNED on screen
1446                 inset = pit->inInset();
1447                 if (inset && inset->owner() &&
1448                         inset->owner()->lyxCode() == InsetOld::ERT_CODE)
1449                 {
1450                         align = LYX_ALIGN_LEFT;
1451                 }
1452
1453                 // Display-style insets should always be on a centred row
1454                 // The test on pit->size() is to catch zero-size pars, which
1455                 // would trigger the assert in Paragraph::getInset().
1456                 inset = pit->size() ? pit->getInset(rit->pos()) : 0;
1457                 if (inset && inset->display()) {
1458                         align = LYX_ALIGN_CENTER;
1459                 }
1460
1461                 switch (align) {
1462             case LYX_ALIGN_BLOCK:
1463                 {
1464                         int const ns = numberOfSeparators(*pit, *rit);
1465                         RowList::iterator next_row = boost::next(rit);
1466                         bool disp_inset = false;
1467                         if (next_row != pit->rows.end()) {
1468                                 InsetOld * in = pit->getInset(next_row->pos());
1469                                 if (in)
1470                                         disp_inset = in->display();
1471                         }
1472                         // If we have separators, this is not the last row of a
1473                         // par, does not end in newline, and is not row above a
1474                         // display inset... then stretch it
1475                         if (ns
1476                                 && rit->end() < pit->size()
1477                                 && !pit->isNewline(next_row->pos() - 1)
1478                                 && !disp_inset
1479                                 ) {
1480                                         fill_separator = w / ns;
1481                         } else if (is_rtl) {
1482                                 x += w;
1483                         }
1484                         break;
1485             }
1486             case LYX_ALIGN_RIGHT:
1487                         x += w;
1488                         break;
1489             case LYX_ALIGN_CENTER:
1490                         x += w / 2;
1491                         break;
1492                 }
1493         }
1494
1495         computeBidiTables(*pit, *bv()->buffer(), *rit);
1496         if (is_rtl) {
1497                 pos_type body_pos = pit->beginningOfBody();
1498                 pos_type last = lastPos(*pit, *rit);
1499
1500                 if (body_pos > 0 &&
1501                                 (body_pos - 1 > last ||
1502                                  !pit->isLineSeparator(body_pos - 1))) {
1503                         x += font_metrics::width(layout->labelsep, getLabelFont(pit));
1504                         if (body_pos - 1 <= last)
1505                                 x += fill_label_hfill;
1506                 }
1507         }
1508
1509         rit->fill_hfill(fill_hfill);
1510         rit->fill_label_hfill(fill_label_hfill);
1511         rit->fill_separator(fill_separator);
1512         rit->x(x);
1513 }
1514
1515
1516 // important for the screen
1517
1518
1519 // the cursor set functions have a special mechanism. When they
1520 // realize, that you left an empty paragraph, they will delete it.
1521 // They also delete the corresponding row
1522
1523 void LyXText::cursorRightOneWord()
1524 {
1525         ::cursorRightOneWord(*this, cursor, ownerParagraphs());
1526         setCursor(cursorPar(), cursor.pos());
1527 }
1528
1529
1530 // Skip initial whitespace at end of word and move cursor to *start*
1531 // of prior word, not to end of next prior word.
1532 void LyXText::cursorLeftOneWord()
1533 {
1534         LyXCursor tmpcursor = cursor;
1535         ::cursorLeftOneWord(*this, tmpcursor, ownerParagraphs());
1536         setCursor(getPar(tmpcursor), tmpcursor.pos());
1537 }
1538
1539
1540 void LyXText::selectWord(word_location loc)
1541 {
1542         LyXCursor from = cursor;
1543         LyXCursor to = cursor;
1544         ::getWord(*this, from, to, loc, ownerParagraphs());
1545         if (cursor != from)
1546                 setCursor(from.par(), from.pos());
1547         if (to == from)
1548                 return;
1549         selection.cursor = cursor;
1550         setCursor(to.par(), to.pos());
1551         setSelection();
1552 }
1553
1554
1555 // Select the word currently under the cursor when no
1556 // selection is currently set
1557 bool LyXText::selectWordWhenUnderCursor(word_location loc)
1558 {
1559         if (!selection.set()) {
1560                 selectWord(loc);
1561                 return selection.set();
1562         }
1563         return false;
1564 }
1565
1566
1567 void LyXText::acceptChange()
1568 {
1569         if (!selection.set() && cursorPar()->size())
1570                 return;
1571
1572         if (selection.start.par() == selection.end.par()) {
1573                 LyXCursor & startc = selection.start;
1574                 LyXCursor & endc = selection.end;
1575                 recordUndo(Undo::INSERT, this, startc.par());
1576                 getPar(startc)->acceptChange(startc.pos(), endc.pos());
1577                 finishUndo();
1578                 clearSelection();
1579                 redoParagraph(getPar(startc));
1580                 setCursorIntern(startc.par(), 0);
1581         }
1582 #warning handle multi par selection
1583 }
1584
1585
1586 void LyXText::rejectChange()
1587 {
1588         if (!selection.set() && cursorPar()->size())
1589                 return;
1590
1591         if (selection.start.par() == selection.end.par()) {
1592                 LyXCursor & startc = selection.start;
1593                 LyXCursor & endc = selection.end;
1594                 recordUndo(Undo::INSERT, this, startc.par());
1595                 getPar(startc)->rejectChange(startc.pos(), endc.pos());
1596                 finishUndo();
1597                 clearSelection();
1598                 redoParagraph(getPar(startc));
1599                 setCursorIntern(startc.par(), 0);
1600         }
1601 #warning handle multi par selection
1602 }
1603
1604
1605 // This function is only used by the spellchecker for NextWord().
1606 // It doesn't handle LYX_ACCENTs and probably never will.
1607 WordLangTuple const LyXText::selectNextWordToSpellcheck(float & value)
1608 {
1609         if (the_locking_inset) {
1610                 WordLangTuple word =
1611                         the_locking_inset->selectNextWordToSpellcheck(bv(), value);
1612                 if (!word.word().empty()) {
1613                         value += float(cursor.y());
1614                         value /= float(height);
1615                         return word;
1616                 }
1617                 // we have to go on checking so move cursor to the next char
1618                 if (cursor.pos() == cursorPar()->size()) {
1619                         if (cursor.par() + 1 == int(ownerParagraphs().size()))
1620                                 return word;
1621                         cursor.par(cursor.par() + 1);
1622                         cursor.pos(0);
1623                 } else
1624                                 cursor.pos(cursor.pos() + 1);
1625         }
1626         int const tmppar = cursor.par();
1627
1628         // If this is not the very first word, skip rest of
1629         // current word because we are probably in the middle
1630         // of a word if there is text here.
1631         if (cursor.pos() || cursor.par() != 0) {
1632                 while (cursor.pos() < cursorPar()->size()
1633                        && cursorPar()->isLetter(cursor.pos()))
1634                         cursor.pos(cursor.pos() + 1);
1635         }
1636
1637         // Now, skip until we have real text (will jump paragraphs)
1638         while (true) {
1639                 ParagraphList::iterator cpit = cursorPar();
1640                 pos_type const cpos = cursor.pos();
1641
1642                 if (cpos == cpit->size()) {
1643                         if (cursor.par() + 1 != int(ownerParagraphs().size())) {
1644                                 cursor.par(cursor.par() + 1);
1645                                 cursor.pos(0);
1646                                 continue;
1647                         }
1648                         break;
1649                 }
1650
1651                 bool const is_good_inset = cpit->isInset(cpos)
1652                         && cpit->getInset(cpos)->allowSpellcheck();
1653
1654                 if (!isDeletedText(*cpit, cpos)
1655                     && (is_good_inset || cpit->isLetter(cpos)))
1656                         break;
1657
1658                 cursor.pos(cpos + 1);
1659         }
1660
1661         // now check if we hit an inset so it has to be a inset containing text!
1662         if (cursor.pos() < cursorPar()->size() &&
1663             cursorPar()->isInset(cursor.pos())) {
1664                 // lock the inset!
1665                 FuncRequest cmd(bv(), LFUN_INSET_EDIT, "left");
1666                 cursorPar()->getInset(cursor.pos())->dispatch(cmd);
1667                 // now call us again to do the above trick
1668                 // but obviously we have to start from down below ;)
1669                 return bv()->text->selectNextWordToSpellcheck(value);
1670         }
1671
1672         // Update the value if we changed paragraphs
1673         if (cursor.par() != tmppar) {
1674                 setCursor(cursor.par(), cursor.pos());
1675                 value = float(cursor.y())/float(height);
1676         }
1677
1678         // Start the selection from here
1679         selection.cursor = cursor;
1680
1681         string lang_code = getFont(cursorPar(), cursor.pos()).language()->code();
1682         // and find the end of the word (insets like optional hyphens
1683         // and ligature break are part of a word)
1684         while (cursor.pos() < cursorPar()->size()
1685                && cursorPar()->isLetter(cursor.pos())
1686                && !isDeletedText(*cursorPar(), cursor.pos()))
1687                 cursor.pos(cursor.pos() + 1);
1688
1689         // Finally, we copy the word to a string and return it
1690         string str;
1691         if (selection.cursor.pos() < cursor.pos()) {
1692                 for (pos_type i = selection.cursor.pos(); i < cursor.pos(); ++i) {
1693                         if (!cursorPar()->isInset(i))
1694                                 str += cursorPar()->getChar(i);
1695                 }
1696         }
1697         return WordLangTuple(str, lang_code);
1698 }
1699
1700
1701 // This one is also only for the spellchecker
1702 void LyXText::selectSelectedWord()
1703 {
1704         if (the_locking_inset) {
1705                 the_locking_inset->selectSelectedWord(bv());
1706                 return;
1707         }
1708         // move cursor to the beginning
1709         setCursor(selection.cursor.par(), selection.cursor.pos());
1710
1711         // set the sel cursor
1712         selection.cursor = cursor;
1713
1714         // now find the end of the word
1715         while (cursor.pos() < cursorPar()->size()
1716                && cursorPar()->isLetter(cursor.pos()))
1717                 cursor.pos(cursor.pos() + 1);
1718
1719         setCursor(cursorPar(), cursor.pos());
1720
1721         // finally set the selection
1722         setSelection();
1723 }
1724
1725
1726 // Delete from cursor up to the end of the current or next word.
1727 void LyXText::deleteWordForward()
1728 {
1729         if (cursorPar()->empty())
1730                 cursorRight(bv());
1731         else {
1732                 LyXCursor tmpcursor = cursor;
1733                 selection.set(true); // to avoid deletion
1734                 cursorRightOneWord();
1735                 setCursor(tmpcursor, tmpcursor.par(), tmpcursor.pos());
1736                 selection.cursor = cursor;
1737                 cursor = tmpcursor;
1738                 setSelection();
1739                 cutSelection(true, false);
1740         }
1741 }
1742
1743
1744 // Delete from cursor to start of current or prior word.
1745 void LyXText::deleteWordBackward()
1746 {
1747         if (cursorPar()->empty())
1748                 cursorLeft(bv());
1749         else {
1750                 LyXCursor tmpcursor = cursor;
1751                 selection.set(true); // to avoid deletion
1752                 cursorLeftOneWord();
1753                 setCursor(tmpcursor, tmpcursor.par(), tmpcursor.pos());
1754                 selection.cursor = cursor;
1755                 cursor = tmpcursor;
1756                 setSelection();
1757                 cutSelection(true, false);
1758         }
1759 }
1760
1761
1762 // Kill to end of line.
1763 void LyXText::deleteLineForward()
1764 {
1765         if (cursorPar()->empty())
1766                 // Paragraph is empty, so we just go to the right
1767                 cursorRight(bv());
1768         else {
1769                 LyXCursor tmpcursor = cursor;
1770                 // We can't store the row over a regular setCursor
1771                 // so we set it to 0 and reset it afterwards.
1772                 selection.set(true); // to avoid deletion
1773                 cursorEnd();
1774                 setCursor(tmpcursor, tmpcursor.par(), tmpcursor.pos());
1775                 selection.cursor = cursor;
1776                 cursor = tmpcursor;
1777                 setSelection();
1778                 // What is this test for ??? (JMarc)
1779                 if (!selection.set()) {
1780                         deleteWordForward();
1781                 } else {
1782                         cutSelection(true, false);
1783                 }
1784         }
1785 }
1786
1787
1788 void LyXText::changeCase(LyXText::TextCase action)
1789 {
1790         LyXCursor from;
1791         LyXCursor to;
1792
1793         if (selection.set()) {
1794                 from = selection.start;
1795                 to = selection.end;
1796         } else {
1797                 from = cursor;
1798                 ::getWord(*this, from, to, lyx::PARTIAL_WORD, ownerParagraphs());
1799                 setCursor(to.par(), to.pos() + 1);
1800         }
1801
1802         recordUndo(Undo::ATOMIC, this, from.par(), to.par());
1803
1804         pos_type pos = from.pos();
1805         int par = from.par();
1806
1807         while (par != int(ownerParagraphs().size()) &&
1808                (pos != to.pos() || par != to.par())) {
1809                 ParagraphList::iterator pit = getPar(par);
1810                 if (pos == pit->size()) {
1811                         ++par;
1812                         pos = 0;
1813                         continue;
1814                 }
1815                 unsigned char c = pit->getChar(pos);
1816                 if (c != Paragraph::META_INSET) {
1817                         switch (action) {
1818                         case text_lowercase:
1819                                 c = lowercase(c);
1820                                 break;
1821                         case text_capitalization:
1822                                 c = uppercase(c);
1823                                 action = text_lowercase;
1824                                 break;
1825                         case text_uppercase:
1826                                 c = uppercase(c);
1827                                 break;
1828                         }
1829                 }
1830 #warning changes
1831                 pit->setChar(pos, c);
1832                 ++pos;
1833         }
1834 }
1835
1836
1837 void LyXText::Delete()
1838 {
1839         // this is a very easy implementation
1840
1841         LyXCursor old_cursor = cursor;
1842         int const old_cur_par_id = cursorPar()->id();
1843         int const old_cur_par_prev_id =
1844                 old_cursor.par() ? getPar(old_cursor.par() - 1)->id() : -1;
1845
1846         // just move to the right
1847         cursorRight(bv());
1848
1849         // CHECK Look at the comment here.
1850         // This check is not very good...
1851         // The cursorRightIntern calls DeleteEmptyParagraphMechanism
1852         // and that can very well delete the par or par->previous in
1853         // old_cursor. Will a solution where we compare paragraph id's
1854         //work better?
1855         int iid = cursor.par() ? getPar(cursor.par() - 1)->id() : -1;
1856         if (iid == old_cur_par_prev_id && cursorPar()->id() != old_cur_par_id) {
1857                 // delete-empty-paragraph-mechanism has done it
1858                 return;
1859         }
1860
1861         // if you had success make a backspace
1862         if (old_cursor.par() != cursor.par() || old_cursor.pos() != cursor.pos()) {
1863                 recordUndo(Undo::DELETE, this, old_cursor.par());
1864                 backspace();
1865         }
1866 }
1867
1868
1869 void LyXText::backspace()
1870 {
1871         // Get the font that is used to calculate the baselineskip
1872         ParagraphList::iterator pit = cursorPar();
1873         pos_type lastpos = pit->size();
1874
1875         if (cursor.pos() == 0) {
1876                 // The cursor is at the beginning of a paragraph,
1877                 // so the the backspace will collapse two paragraphs into one.
1878
1879                 // but it's not allowed unless it's new
1880                 if (pit->isChangeEdited(0, pit->size()))
1881                         return;
1882
1883                 // we may paste some paragraphs
1884
1885                 // is it an empty paragraph?
1886
1887                 if (lastpos == 0 || (lastpos == 1 && pit->isSeparator(0))) {
1888                         // This is an empty paragraph and we delete it just
1889                         // by moving the cursor one step
1890                         // left and let the DeleteEmptyParagraphMechanism
1891                         // handle the actual deletion of the paragraph.
1892
1893                         if (cursor.par()) {
1894                                 ParagraphList::iterator tmppit = getPar(cursor.par() - 1);
1895                                 if (cursorPar()->layout() == tmppit->layout()
1896                                     && cursorPar()->getAlign() == tmppit->getAlign()) {
1897                                         // Inherit bottom DTD from the paragraph below.
1898                                         // (the one we are deleting)
1899                                         tmppit->params().lineBottom(cursorPar()->params().lineBottom());
1900                                         tmppit->params().spaceBottom(cursorPar()->params().spaceBottom());
1901                                         tmppit->params().pagebreakBottom(cursorPar()->params().pagebreakBottom());
1902                                 }
1903
1904                                 cursorLeft(bv());
1905
1906                                 // the layout things can change the height of a row !
1907                                 redoParagraph();
1908                                 return;
1909                         }
1910                 }
1911
1912                 if (cursor.par() != 0)
1913                         recordUndo(Undo::DELETE, this, cursor.par() - 1, cursor.par());
1914
1915                 ParagraphList::iterator tmppit = cursorPar();
1916                 // We used to do cursorLeftIntern() here, but it is
1917                 // not a good idea since it triggers the auto-delete
1918                 // mechanism. So we do a cursorLeftIntern()-lite,
1919                 // without the dreaded mechanism. (JMarc)
1920                 if (cursor.par() != 0) {
1921                         // steps into the above paragraph.
1922                         setCursorIntern(cursor.par() - 1,
1923                                         getPar(cursor.par() - 1)->size(),
1924                                         false);
1925                 }
1926
1927                 // Pasting is not allowed, if the paragraphs have different
1928                 // layout. I think it is a real bug of all other
1929                 // word processors to allow it. It confuses the user.
1930                 // Correction: Pasting is always allowed with standard-layout
1931                 Buffer & buf = *bv()->buffer();
1932                 BufferParams const & bufparams = buf.params();
1933                 LyXTextClass const & tclass = bufparams.getLyXTextClass();
1934
1935                 if (cursorPar() != tmppit
1936                     && (cursorPar()->layout() == tmppit->layout()
1937                         || tmppit->layout() == tclass.defaultLayout())
1938                     && cursorPar()->getAlign() == tmppit->getAlign()) {
1939                         mergeParagraph(bufparams,
1940                                        buf.paragraphs(), cursorPar());
1941
1942                         if (cursor.pos() && cursorPar()->isSeparator(cursor.pos() - 1))
1943                                 cursor.pos(cursor.pos() - 1);
1944
1945                         // the row may have changed, block, hfills etc.
1946                         updateCounters();
1947                         setCursor(cursor.par(), cursor.pos(), false);
1948                 }
1949         } else {
1950                 // this is the code for a normal backspace, not pasting
1951                 // any paragraphs
1952                 recordUndo(Undo::DELETE, this, cursor.par());
1953                 // We used to do cursorLeftIntern() here, but it is
1954                 // not a good idea since it triggers the auto-delete
1955                 // mechanism. So we do a cursorLeftIntern()-lite,
1956                 // without the dreaded mechanism. (JMarc)
1957                 setCursorIntern(cursor.par(), cursor.pos() - 1,
1958                                 false, cursor.boundary());
1959                 cursorPar()->erase(cursor.pos());
1960         }
1961
1962         lastpos = cursorPar()->size();
1963         if (cursor.pos() == lastpos)
1964                 setCurrentFont();
1965
1966         redoParagraph();
1967         setCursor(cursor.par(), cursor.pos(), false, !cursor.boundary());
1968 }
1969
1970
1971 ParagraphList::iterator LyXText::cursorPar() const
1972 {
1973         return getPar(cursor.par());
1974 }
1975
1976
1977 ParagraphList::iterator LyXText::getPar(LyXCursor const & cur) const
1978 {
1979         return getPar(cur.par());
1980 }
1981
1982
1983 ParagraphList::iterator LyXText::getPar(int par) const
1984 {
1985         BOOST_ASSERT(par >= 0);
1986         BOOST_ASSERT(par < int(ownerParagraphs().size()));
1987         ParagraphList::iterator pit = ownerParagraphs().begin();
1988         std::advance(pit, par);
1989         return pit;
1990 }
1991
1992
1993
1994 RowList::iterator LyXText::cursorRow() const
1995 {
1996         return getRow(*cursorPar(), cursor.pos());
1997 }
1998
1999
2000 RowList::iterator LyXText::getRow(LyXCursor const & cur) const
2001 {
2002         return getRow(*getPar(cur), cur.pos());
2003 }
2004
2005
2006 RowList::iterator LyXText::getRow(Paragraph & par, pos_type pos) const
2007 {
2008         RowList::iterator rit = boost::prior(par.rows.end());
2009         RowList::iterator const begin = par.rows.begin();
2010
2011         while (rit != begin && rit->pos() > pos)
2012                 --rit;
2013
2014         return rit;
2015 }
2016
2017
2018 RowList::iterator
2019 LyXText::getRowNearY(int y, ParagraphList::iterator & pit) const
2020 {
2021         //lyxerr << "getRowNearY: y " << y << endl;
2022
2023         pit = boost::prior(ownerParagraphs().end());
2024
2025         RowList::iterator rit = lastRow();
2026         RowList::iterator rbegin = firstRow();
2027
2028         while (rit != rbegin && int(pit->y + rit->y_offset()) > y)
2029                 previousRow(pit, rit);
2030
2031         return rit;
2032 }
2033
2034
2035 int LyXText::getDepth() const
2036 {
2037         return cursorPar()->getDepth();
2038 }
2039
2040
2041 RowList::iterator LyXText::firstRow() const
2042 {
2043         return ownerParagraphs().front().rows.begin();
2044 }
2045
2046
2047 RowList::iterator LyXText::lastRow() const
2048 {
2049         return boost::prior(endRow());
2050 }
2051
2052
2053 RowList::iterator LyXText::endRow() const
2054 {
2055         return ownerParagraphs().back().rows.end();
2056 }
2057
2058
2059 void LyXText::nextRow(ParagraphList::iterator & pit,
2060         RowList::iterator & rit) const
2061 {
2062         ++rit;
2063         if (rit == pit->rows.end()) {
2064                 ++pit;
2065                 if (pit == ownerParagraphs().end())
2066                         --pit;
2067                 else
2068                         rit = pit->rows.begin();
2069         }
2070 }
2071
2072
2073 void LyXText::previousRow(ParagraphList::iterator & pit,
2074         RowList::iterator & rit) const
2075 {
2076         if (rit != pit->rows.begin())
2077                 --rit;
2078         else {
2079                 BOOST_ASSERT(pit != ownerParagraphs().begin());
2080                 --pit;
2081                 rit = boost::prior(pit->rows.end());
2082         }
2083 }
2084
2085
2086 string LyXText::selectionAsString(Buffer const & buffer, bool label) const
2087 {
2088         if (!selection.set())
2089                 return string();
2090
2091         // should be const ...
2092         ParagraphList::iterator startpit = getPar(selection.start);
2093         ParagraphList::iterator endpit = getPar(selection.end);
2094         size_t const startpos = selection.start.pos();
2095         size_t const endpos = selection.end.pos();
2096
2097         if (startpit == endpit)
2098                 return startpit->asString(buffer, startpos, endpos, label);
2099
2100         // First paragraph in selection
2101         string result =
2102                 startpit->asString(buffer, startpos, startpit->size(), label) + "\n\n";
2103
2104         // The paragraphs in between (if any)
2105         ParagraphList::iterator pit = startpit;
2106         for (++pit; pit != endpit; ++pit)
2107                 result += pit->asString(buffer, 0, pit->size(), label) + "\n\n";
2108
2109         // Last paragraph in selection
2110         result += endpit->asString(buffer, 0, endpos, label);
2111
2112         return result;
2113 }
2114
2115
2116 int LyXText::parOffset(ParagraphList::iterator pit) const
2117 {
2118         return std::distance(ownerParagraphs().begin(), pit);
2119 }
2120
2121
2122 int LyXText::redoParagraphInternal(ParagraphList::iterator pit)
2123 {
2124         // remove rows of paragraph, keep track of height changes
2125         height -= pit->height;
2126         pit->rows.clear();
2127
2128         // redo insets
2129         InsetList::iterator ii = pit->insetlist.begin();
2130         InsetList::iterator iend = pit->insetlist.end();
2131         for (; ii != iend; ++ii) {
2132                 Dimension dim;
2133                 MetricsInfo mi(bv(), getFont(pit, ii->pos), workWidth());
2134                 ii->inset->metrics(mi, dim);
2135         }
2136
2137         // rebreak the paragraph
2138         int par_width = 0;
2139         int const ww = workWidth();
2140         pit->height = 0;
2141
2142         for (pos_type z = 0; z < pit->size() + 1; ) {
2143                 Row row(z);
2144                 z = rowBreakPoint(pit, row) + 1;
2145                 row.end(z);
2146                 pit->rows.push_back(row);
2147                 RowList::iterator rit = boost::prior(pit->rows.end());
2148                 int const f = fill(pit, *rit, ww);
2149                 int const w = ww - f;
2150                 par_width = std::max(par_width, w);
2151                 rit->fill(f);
2152                 rit->width(w);
2153                 prepareToPrint(pit, rit);
2154                 setHeightOfRow(pit, *rit);
2155                 rit->y_offset(pit->height);
2156                 pit->height += rit->height();
2157         }
2158         height += pit->height;
2159
2160         //lyxerr << "redoParagraph: " << pit->rows.size() << " rows\n";
2161         return par_width;
2162 }
2163
2164
2165 int LyXText::redoParagraphs(ParagraphList::iterator start,
2166   ParagraphList::iterator end)
2167 {
2168         int pars_width = 0;
2169         for ( ; start != end; ++start) {
2170                 int par_width = redoParagraphInternal(start);
2171                 pars_width = std::max(par_width, pars_width);
2172         }
2173         updateRowPositions();
2174         return pars_width;
2175 }
2176
2177
2178 void LyXText::redoParagraph(ParagraphList::iterator pit)
2179 {
2180         redoParagraphInternal(pit);
2181         updateRowPositions();
2182 }
2183
2184
2185 void LyXText::fullRebreak()
2186 {
2187         redoParagraphs(ownerParagraphs().begin(), ownerParagraphs().end());
2188         redoCursor();
2189         selection.cursor = cursor;
2190 }
2191
2192
2193 void LyXText::metrics(MetricsInfo & mi, Dimension & dim)
2194 {
2195         lyxerr << "LyXText::metrics: width: " << mi.base.textwidth
2196                 << " workWidth: " << workWidth() << "\nfont: " << mi.base.font << endl;
2197         //BOOST_ASSERT(mi.base.textwidth);
2198
2199         // rebuild row cache
2200         width  = 0;
2201         ///height = 0;
2202
2203         //anchor_y_ = 0;
2204         width = redoParagraphs(ownerParagraphs().begin(), ownerParagraphs().end());
2205
2206         // final dimension
2207         dim.asc = firstRow()->ascent_of_text();
2208         dim.des = height - dim.asc;
2209         dim.wid = std::max(mi.base.textwidth, int(width));
2210 }