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 "dispatchresult.h"
  26 #include "encoding.h"
  27 #include "funcrequest.h"
  28 #include "gettext.h"
  29 #include "language.h"
  30 #include "LColor.h"
  31 #include "lyxlength.h"
  32 #include "lyxrc.h"
  33 #include "lyxrow.h"
  34 #include "lyxrow_funcs.h"
  35 #include "metricsinfo.h"
  36 #include "paragraph.h"
  37 #include "paragraph_funcs.h"
  38 #include "ParagraphParameters.h"
  39 #include "rowpainter.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 lyx::pos_type;
  53 using lyx::word_location;
  54
  55 using lyx::support::contains;
  56 using lyx::support::lowercase;
  57 using lyx::support::uppercase;
  58
  59 using std::max;
  60 using std::endl;
  61 using std::string;
  62
  63
  64 /// some space for drawing the 'nested' markers (in pixel)
  65 extern int const NEST_MARGIN = 20;
  66 /// margin for changebar
  67 extern int const CHANGEBAR_MARGIN = 10;
  68 /// right margin
  69 extern int const RIGHT_MARGIN = 10;
  70
  71
  72 namespace {
  73
  74 unsigned int maxParagraphWidth(ParagraphList const & plist)
  75 {
  76         unsigned int width = 0;
  77         ParagraphList::const_iterator pit = plist.begin();
  78         ParagraphList::const_iterator end = plist.end();
  79                 for (; pit != end; ++pit)
  80                         width = std::max(width, pit->width);
  81         return width;
  82 }
  83
  84 } // namespace anon
  85
  86
  87 BufferView * LyXText::bv()
  88 {
  89         BOOST_ASSERT(bv_owner != 0);
  90         return bv_owner;
  91 }
  92
  93
  94 double LyXText::spacing(Paragraph const & par) const
  95 {
  96         if (par.params().spacing().isDefault())
  97                 return bv()->buffer()->params().spacing().getValue();
  98         return par.params().spacing().getValue();
  99 }
 100
 101
 102 BufferView * LyXText::bv() const
 103 {
 104         BOOST_ASSERT(bv_owner != 0);
 105         return bv_owner;
 106 }
 107
 108
 109 void LyXText::updateParPositions()
 110 {
 111         ParagraphList::iterator pit = ownerParagraphs().begin();
 112         ParagraphList::iterator end = ownerParagraphs().end();
 113         for (height = 0; pit != end; ++pit) {
 114                 pit->y = height;
 115                 height += pit->height;
 116         }
 117 }
 118
 119
 120 int LyXText::textWidth() const
 121 {
 122         return textwidth_;
 123 }
 124
 125
 126 int LyXText::singleWidth(ParagraphList::iterator pit, pos_type pos) const
 127 {
 128         if (pos >= pit->size())
 129                 return 0;
 130
 131         char const c = pit->getChar(pos);
 132         return singleWidth(pit, pos, c, getFont(pit, pos));
 133 }
 134
 135
 136 int LyXText::singleWidth(ParagraphList::iterator pit,
 137                          pos_type pos, char c, LyXFont const & font) const
 138 {
 139         if (pos >= pit->size()) {
 140                 lyxerr << "in singleWidth(), pos: " << pos << endl;
 141                 BOOST_ASSERT(false);
 142                 return 0;
 143         }
 144
 145         // The most common case is handled first (Asger)
 146         if (IsPrintable(c)) {
 147                 if (!font.language()->RightToLeft()) {
 148                         if ((lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 149                              lyxrc.font_norm_type == LyXRC::ISO_10646_1)
 150                             && font.language()->lang() == "arabic") {
 151                                 if (Encodings::IsComposeChar_arabic(c))
 152                                         return 0;
 153                                 else
 154                                         c = pit->transformChar(c, pos);
 155                         } else if (font.language()->lang() == "hebrew" &&
 156                                  Encodings::IsComposeChar_hebrew(c))
 157                                 return 0;
 158                 }
 159                 return font_metrics::width(c, font);
 160         }
 161
 162         if (c == Paragraph::META_INSET)
 163                 return pit->getInset(pos)->width();
 164
 165         if (IsSeparatorChar(c))
 166                 c = ' ';
 167         return font_metrics::width(c, font);
 168 }
 169
 170
 171 int LyXText::leftMargin(ParagraphList::iterator pit) const
 172 {
 173         return leftMargin(pit, pit->size());
 174 }
 175
 176
 177 int LyXText::leftMargin(ParagraphList::iterator pit, pos_type pos) const
 178 {
 179         LyXTextClass const & tclass =
 180                 bv()->buffer()->params().getLyXTextClass();
 181         LyXLayout_ptr const & layout = pit->layout();
 182
 183         string parindent = layout->parindent;
 184
 185         int x = NEST_MARGIN + CHANGEBAR_MARGIN;
 186
 187         x += font_metrics::signedWidth(tclass.leftmargin(), tclass.defaultfont());
 188
 189         // This is the way LyX handles LaTeX-Environments.
 190         // I have had this idea very late, so it seems to be a
 191         // later added hack and this is true
 192         if (pit->getDepth() == 0) {
 193                 if (pit->layout() == tclass.defaultLayout()) {
 194                         // find the previous same level paragraph
 195                         if (pit != ownerParagraphs().begin()) {
 196                                 ParagraphList::iterator newpit =
 197                                         depthHook(pit, ownerParagraphs(), pit->getDepth());
 198                                 if (newpit == pit && newpit->layout()->nextnoindent)
 199                                         parindent.erase();
 200                         }
 201                 }
 202         } else {
 203                 // find the next level paragraph
 204                 ParagraphList::iterator newpar =
 205                         outerHook(pit, ownerParagraphs());
 206
 207                 // Make a corresponding row. Need to call leftMargin()
 208                 // to check whether it is a sufficent paragraph.
 209                 if (newpar != ownerParagraphs().end()
 210                     && newpar->layout()->isEnvironment()) {
 211                         x = leftMargin(newpar);
 212                 }
 213
 214                 if (newpar != ownerParagraphs().end()
 215                     && pit->layout() == tclass.defaultLayout()) {
 216                         if (newpar->params().noindent())
 217                                 parindent.erase();
 218                         else
 219                                 parindent = newpar->layout()->parindent;
 220                 }
 221         }
 222
 223         LyXFont const labelfont = getLabelFont(pit);
 224         switch (layout->margintype) {
 225         case MARGIN_DYNAMIC:
 226                 if (!layout->leftmargin.empty())
 227                         x += font_metrics::signedWidth(layout->leftmargin,
 228                                                   tclass.defaultfont());
 229                 if (!pit->getLabelstring().empty()) {
 230                         x += font_metrics::signedWidth(layout->labelindent,
 231                                                   labelfont);
 232                         x += font_metrics::width(pit->getLabelstring(),
 233                                             labelfont);
 234                         x += font_metrics::width(layout->labelsep, labelfont);
 235                 }
 236                 break;
 237
 238         case MARGIN_MANUAL:
 239                 x += font_metrics::signedWidth(layout->labelindent, labelfont);
 240                 // The width of an empty par, even with manual label, should be 0
 241                 if (!pit->empty() && pos >= pit->beginOfBody()) {
 242                         if (!pit->getLabelWidthString().empty()) {
 243                                 x += font_metrics::width(pit->getLabelWidthString(),
 244                                                labelfont);
 245                                 x += font_metrics::width(layout->labelsep, labelfont);
 246                         }
 247                 }
 248                 break;
 249
 250         case MARGIN_STATIC:
 251                 x += font_metrics::signedWidth(layout->leftmargin, tclass.defaultfont()) * 4
 252                         / (pit->getDepth() + 4);
 253                 break;
 254
 255         case MARGIN_FIRST_DYNAMIC:
 256                 if (layout->labeltype == LABEL_MANUAL) {
 257                         if (pos >= pit->beginOfBody()) {
 258                                 x += font_metrics::signedWidth(layout->leftmargin,
 259                                                           labelfont);
 260                         } else {
 261                                 x += font_metrics::signedWidth(layout->labelindent,
 262                                                           labelfont);
 263                         }
 264                 } else if (pos != 0
 265                            // Special case to fix problems with
 266                            // theorems (JMarc)
 267                            || (layout->labeltype == LABEL_STATIC
 268                                && layout->latextype == LATEX_ENVIRONMENT
 269                                && !isFirstInSequence(pit, ownerParagraphs()))) {
 270                         x += font_metrics::signedWidth(layout->leftmargin,
 271                                                   labelfont);
 272                 } else if (layout->labeltype != LABEL_TOP_ENVIRONMENT
 273                            && layout->labeltype != LABEL_BIBLIO
 274                            && layout->labeltype !=
 275                            LABEL_CENTERED_TOP_ENVIRONMENT) {
 276                         x += font_metrics::signedWidth(layout->labelindent,
 277                                                   labelfont);
 278                         x += font_metrics::width(layout->labelsep, labelfont);
 279                         x += font_metrics::width(pit->getLabelstring(),
 280                                             labelfont);
 281                 }
 282                 break;
 283
 284         case MARGIN_RIGHT_ADDRESS_BOX: {
 285                 // ok, a terrible hack. The left margin depends on the widest
 286                 // row in this paragraph.
 287                 RowList::iterator rit = pit->rows.begin();
 288                 RowList::iterator end = pit->rows.end();
 289 #warning This is wrong.
 290                 int minfill = textwidth_;
 291                 for ( ; rit != end; ++rit)
 292                         if (rit->fill() < minfill)
 293                                 minfill = rit->fill();
 294                 x += font_metrics::signedWidth(layout->leftmargin,
 295                         tclass.defaultfont());
 296                 x += minfill;
 297                 break;
 298         }
 299         }
 300
 301         if (!pit->params().leftIndent().zero()) {
 302                 int const tw = inset_owner ?
 303                         inset_owner->latexTextWidth(bv()) : textWidth();
 304                 x += pit->params().leftIndent().inPixels(tw);
 305         }
 306
 307         LyXAlignment align;
 308
 309         if (pit->params().align() == LYX_ALIGN_LAYOUT)
 310                 align = layout->align;
 311         else
 312                 align = pit->params().align();
 313
 314         // set the correct parindent
 315         if (pos == 0) {
 316                 if ((layout->labeltype == LABEL_NO_LABEL
 317                      || layout->labeltype == LABEL_TOP_ENVIRONMENT
 318                      || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
 319                      || (layout->labeltype == LABEL_STATIC
 320                          && layout->latextype == LATEX_ENVIRONMENT
 321                          && !isFirstInSequence(pit, ownerParagraphs())))
 322                     && align == LYX_ALIGN_BLOCK
 323                     && !pit->params().noindent()
 324                         // in tabulars and ert paragraphs are never indented!
 325                         && (!pit->inInset() || !pit->inInset()->owner() ||
 326                                 (pit->inInset()->owner()->lyxCode() != InsetOld::TABULAR_CODE &&
 327                                  pit->inInset()->owner()->lyxCode() != InsetOld::ERT_CODE))
 328                     && (pit->layout() != tclass.defaultLayout() ||
 329                         bv()->buffer()->params().paragraph_separation ==
 330                         BufferParams::PARSEP_INDENT)) {
 331                         x += font_metrics::signedWidth(parindent,
 332                                                   tclass.defaultfont());
 333                 }
 334         }
 335
 336         return x;
 337 }
 338
 339
 340 int LyXText::rightMargin(Paragraph const & par) const
 341 {
 342         LyXTextClass const & tclass = bv()->buffer()->params().getLyXTextClass();
 343
 344         return
 345                 RIGHT_MARGIN
 346                 + font_metrics::signedWidth(tclass.rightmargin(),
 347                                        tclass.defaultfont())
 348                 + font_metrics::signedWidth(par.layout()->rightmargin,
 349                                        tclass.defaultfont())
 350                 * 4 / (par.getDepth() + 4);
 351 }
 352
 353
 354 int LyXText::labelEnd(ParagraphList::iterator pit) const
 355 {
 356         // labelEnd is only needed if the layout fills a flushleft label.
 357         if (pit->layout()->margintype != MARGIN_MANUAL)
 358                 return 0;
 359         // return the beginning of the body
 360         return leftMargin(pit);
 361 }
 362
 363
 364 namespace {
 365
 366 // this needs special handling - only newlines count as a break point
 367 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
 368 {
 369         pos_type const end = par.size();
 370
 371         for (; i < end; ++i)
 372                 if (par.isNewline(i))
 373                         return i + 1;
 374
 375         return end;
 376 }
 377
 378 };
 379
 380
 381 void LyXText::rowBreakPoint(ParagraphList::iterator pit, Row & row) const
 382 {
 383         pos_type const end = pit->size();
 384         pos_type const pos = row.pos();
 385         if (pos == end) {
 386                 row.endpos(end);
 387                 return;
 388         }
 389
 390         // maximum pixel width of a row
 391         int width = textWidth() - rightMargin(*pit); // - leftMargin(pit, row);
 392         if (width < 0) {
 393                 row.endpos(end);
 394                 return;
 395         }
 396
 397         LyXLayout_ptr const & layout = pit->layout();
 398
 399         if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX) {
 400                 row.endpos(addressBreakPoint(pos, *pit));
 401                 return;
 402         }
 403
 404         pos_type const body_pos = pit->beginOfBody();
 405
 406
 407         // Now we iterate through until we reach the right margin
 408         // or the end of the par, then choose the possible break
 409         // nearest that.
 410
 411         int const left = leftMargin(pit, pos);
 412         int x = left;
 413
 414         // pixel width since last breakpoint
 415         int chunkwidth = 0;
 416
 417
 418         // We re-use the font resolution for the entire font span when possible
 419         LyXFont font = getFont(pit, pos);
 420         lyx::pos_type endPosOfFontSpan = pit->getEndPosOfFontSpan(pos);
 421
 422         pos_type point = end;
 423         pos_type i = pos;
 424         for ( ; i < end; ++i) {
 425                 if (pit->isNewline(i)) {
 426                         point = i + 1;
 427                         break;
 428                 }
 429                 // Break before...
 430                 if (i + 1 < end) {
 431                         if (pit->isInset(i + 1) && pit->getInset(i + 1)->display()) {
 432                                 point = i + 1;
 433                                 break;
 434                         }
 435                         // ...and after.
 436                         if (pit->isInset(i) && pit->getInset(i)->display()) {
 437                                 point = i + 1;
 438                                 break;
 439                         }
 440                 }
 441
 442                 char const c = pit->getChar(i);
 443
 444                 if (i > endPosOfFontSpan) {
 445                         font = getFont(pit, i);
 446                         endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 447                 }
 448
 449                 {
 450                         int thiswidth = singleWidth(pit, i, c, font);
 451
 452                         // add the auto-hfill from label end to the body
 453                         if (body_pos && i == body_pos) {
 454                                 int add = font_metrics::width(layout->labelsep, getLabelFont(pit));
 455                                 if (pit->isLineSeparator(i - 1))
 456                                         add -= singleWidth(pit, i - 1);
 457
 458                                 add = std::max(add, labelEnd(pit) - x);
 459                                 thiswidth += add;
 460                         }
 461
 462                         x += thiswidth;
 463                         //lyxerr << "i: " << i << " x: "
 464                         //<< x << " width: " << width << endl;
 465                         chunkwidth += thiswidth;
 466                 }
 467
 468                 // break before a character that will fall off
 469                 // the right of the row
 470                 if (x >= width) {
 471                         // if no break before, break here
 472                         if (point == end || chunkwidth >= width - left) {
 473                                 if (i > pos) {
 474                                         point = i;
 475                                         break;
 476                                 }
 477                         }
 478                         // exit on last registered breakpoint:
 479                         break;
 480                 }
 481
 482                 if (!pit->isInset(i) || pit->getInset(i)->isChar()) {
 483                         // some insets are line separators too
 484                         if (pit->isLineSeparator(i)) {
 485                                 // register breakpoint:
 486                                 point = i + 1;
 487                                 chunkwidth = 0;
 488                         }
 489                 }
 490         }
 491
 492         if (i == end && x < width) {
 493                 // maybe found one, but the par is short enough.
 494                 point = end;
 495         }
 496
 497         // manual labels cannot be broken in LaTeX. But we
 498         // want to make our on-screen rendering of footnotes
 499         // etc. still break
 500         if (body_pos && point < body_pos)
 501                 point = body_pos;
 502
 503         row.endpos(point);
 504 }
 505
 506
 507 // returns the minimum space a row needs on the screen in pixel
 508 void LyXText::fill(ParagraphList::iterator pit, Row & row, int workwidth) const
 509 {
 510         // get the pure distance
 511         pos_type const end = row.endpos();
 512
 513         string labelsep = pit->layout()->labelsep;
 514         int w = leftMargin(pit, row.pos());
 515
 516         pos_type const body_pos = pit->beginOfBody();
 517         pos_type i = row.pos();
 518
 519         if (i < end) {
 520                 // We re-use the font resolution for the entire span when possible
 521                 LyXFont font = getFont(pit, i);
 522                 lyx::pos_type endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 523                 for ( ; i < end; ++i) {
 524                         if (body_pos > 0 && i == body_pos) {
 525                                 w += font_metrics::width(labelsep, getLabelFont(pit));
 526                                 if (pit->isLineSeparator(i - 1))
 527                                         w -= singleWidth(pit, i - 1);
 528                                 w = max(w, labelEnd(pit));
 529                         }
 530                         char const c = pit->getChar(i);
 531                         if (IsPrintable(c) && i > endPosOfFontSpan) {
 532                                 // We need to get the next font
 533                                 font = getFont(pit, i);
 534                                 endPosOfFontSpan = pit->getEndPosOfFontSpan(i);
 535                         }
 536                         w += singleWidth(pit, i, c, font);
 537                 }
 538         }
 539
 540         if (body_pos > 0 && body_pos >= end) {
 541                 w += font_metrics::width(labelsep, getLabelFont(pit));
 542                 if (end > 0 && pit->isLineSeparator(end - 1))
 543                         w -= singleWidth(pit, end - 1);
 544                 w = max(w, labelEnd(pit));
 545         }
 546
 547         int const fill = workwidth - w - rightMargin(*pit);
 548         row.fill(fill);
 549         row.width(workwidth - fill);
 550 }
 551
 552
 553 // returns the minimum space a manual label needs on the screen in pixel
 554 int LyXText::labelFill(ParagraphList::iterator pit, Row const & row) const
 555 {
 556         pos_type last = pit->beginOfBody();
 557
 558         BOOST_ASSERT(last > 0);
 559
 560         // -1 because a label ends with a space that is in the label
 561         --last;
 562
 563         // a separator at this end does not count
 564         if (pit->isLineSeparator(last))
 565                 --last;
 566
 567         int w = 0;
 568         for (pos_type i = row.pos(); i <= last; ++i)
 569                 w += singleWidth(pit, i);
 570
 571         string const & label = pit->params().labelWidthString();
 572         if (label.empty())
 573                 return 0;
 574
 575         return max(0, font_metrics::width(label, getLabelFont(pit)) - w);
 576 }
 577
 578
 579 LColor_color LyXText::backgroundColor() const
 580 {
 581         if (inset_owner)
 582                 return inset_owner->backgroundColor();
 583         return LColor::background;
 584 }
 585
 586
 587 void LyXText::setHeightOfRow(ParagraphList::iterator pit, Row & row)
 588 {
 589         // get the maximum ascent and the maximum descent
 590         double layoutasc = 0;
 591         double layoutdesc = 0;
 592         double const dh = defaultRowHeight();
 593
 594         // ok, let us initialize the maxasc and maxdesc value.
 595         // Only the fontsize count. The other properties
 596         // are taken from the layoutfont. Nicer on the screen :)
 597         LyXLayout_ptr const & layout = pit->layout();
 598
 599         // as max get the first character of this row then it can increase but not
 600         // decrease the height. Just some point to start with so we don't have to
 601         // do the assignment below too often.
 602         LyXFont font = getFont(pit, row.pos());
 603         LyXFont::FONT_SIZE const tmpsize = font.size();
 604         font = getLayoutFont(pit);
 605         LyXFont::FONT_SIZE const size = font.size();
 606         font.setSize(tmpsize);
 607
 608         LyXFont labelfont = getLabelFont(pit);
 609
 610         // these are minimum values
 611         double const spacing_val = layout->spacing.getValue() * spacing(*pit);
 612         //lyxerr << "spacing_val = " << spacing_val << endl;
 613         int maxasc  = int(font_metrics::maxAscent(font)  * spacing_val);
 614         int maxdesc = int(font_metrics::maxDescent(font) * spacing_val);
 615
 616         // insets may be taller
 617         InsetList::iterator ii = pit->insetlist.begin();
 618         InsetList::iterator iend = pit->insetlist.end();
 619         for ( ; ii != iend; ++ii) {
 620                 if (ii->pos >= row.pos() && ii->pos < row.endpos()) {
 621                         maxasc  = max(maxasc,  ii->inset->ascent());
 622                         maxdesc = max(maxdesc, ii->inset->descent());
 623                 }
 624         }
 625
 626         // Check if any custom fonts are larger (Asger)
 627         // This is not completely correct, but we can live with the small,
 628         // cosmetic error for now.
 629         int labeladdon = 0;
 630         pos_type const pos_end = row.endpos();
 631
 632         LyXFont::FONT_SIZE maxsize =
 633                 pit->highestFontInRange(row.pos(), pos_end, size);
 634         if (maxsize > font.size()) {
 635                 font.setSize(maxsize);
 636                 maxasc  = max(maxasc,  font_metrics::maxAscent(font));
 637                 maxdesc = max(maxdesc, font_metrics::maxDescent(font));
 638         }
 639
 640         // This is nicer with box insets:
 641         ++maxasc;
 642         ++maxdesc;
 643
 644         row.ascent_of_text(maxasc);
 645
 646         // is it a top line?
 647         if (row.pos() == 0) {
 648                 BufferParams const & bufparams = bv()->buffer()->params();
 649                 // some parksips VERY EASY IMPLEMENTATION
 650                 if (bv()->buffer()->params().paragraph_separation
 651                     == BufferParams::PARSEP_SKIP
 652                         && pit != ownerParagraphs().begin()
 653                         && ((layout->isParagraph() && pit->getDepth() == 0)
 654                             || (boost::prior(pit)->layout()->isParagraph()
 655                                 && boost::prior(pit)->getDepth() == 0)))
 656                 {
 657                                 maxasc += bufparams.getDefSkip().inPixels(*bv());
 658                 }
 659
 660                 // add user added vertical space
 661                 maxasc += getLengthMarkerHeight(*bv(), pit->params().spaceTop());
 662
 663                 if (pit->params().startOfAppendix())
 664                         maxasc += int(3 * dh);
 665
 666                 // This is special code for the chapter, since the label of this
 667                 // layout is printed in an extra row
 668                 if (layout->counter == "chapter" && bufparams.secnumdepth >= 0) {
 669                         labeladdon = int(font_metrics::maxHeight(labelfont)
 670                                      * layout->spacing.getValue() * spacing(*pit));
 671                 }
 672
 673                 // special code for the top label
 674                 if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
 675                      || layout->labeltype == LABEL_BIBLIO
 676                      || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
 677                     && isFirstInSequence(pit, ownerParagraphs())
 678                     && !pit->getLabelstring().empty())
 679                 {
 680                         labeladdon = int(
 681                                   font_metrics::maxHeight(labelfont)
 682                                         * layout->spacing.getValue()
 683                                         * spacing(*pit)
 684                                 + (layout->topsep + layout->labelbottomsep) * dh);
 685                 }
 686
 687                 // And now the layout spaces, for example before and after
 688                 // a section, or between the items of a itemize or enumerate
 689                 // environment.
 690
 691                 ParagraphList::iterator prev =
 692                         depthHook(pit, ownerParagraphs(), pit->getDepth());
 693                 if (prev != pit
 694                     && prev->layout() == layout
 695                     && prev->getDepth() == pit->getDepth()
 696                     && prev->getLabelWidthString() == pit->getLabelWidthString())
 697                 {
 698                         layoutasc = layout->itemsep * dh;
 699                 } else if (pit != ownerParagraphs().begin() || row.pos() != 0) {
 700                         if (layout->topsep > 0)
 701                                 layoutasc = layout->topsep * dh;
 702                 }
 703
 704                 prev = outerHook(pit, ownerParagraphs());
 705                 if (prev != ownerParagraphs().end()) {
 706                         maxasc += int(prev->layout()->parsep * dh);
 707                 } else if (pit != ownerParagraphs().begin()) {
 708                         ParagraphList::iterator prior_pit = boost::prior(pit);
 709                         if (prior_pit->getDepth() != 0 ||
 710                                         prior_pit->layout() == layout) {
 711                                 maxasc += int(layout->parsep * dh);
 712                         }
 713                 }
 714         }
 715
 716         // is it a bottom line?
 717         if (row.endpos() >= pit->size()) {
 718                 // add the vertical spaces, that the user added
 719                 maxdesc += getLengthMarkerHeight(*bv(), pit->params().spaceBottom());
 720
 721                 // and now the layout spaces, for example before and after
 722                 // a section, or between the items of a itemize or enumerate
 723                 // environment
 724                 ParagraphList::iterator nextpit = boost::next(pit);
 725                 if (nextpit != ownerParagraphs().end()) {
 726                         ParagraphList::iterator cpit = pit;
 727                         double usual = 0;
 728                         double unusual = 0;
 729
 730                         if (cpit->getDepth() > nextpit->getDepth()) {
 731                                 usual = cpit->layout()->bottomsep * dh;
 732                                 cpit = depthHook(cpit, ownerParagraphs(), nextpit->getDepth());
 733                                 if (cpit->layout() != nextpit->layout()
 734                                         || nextpit->getLabelWidthString() != cpit->getLabelWidthString())
 735                                 {
 736                                         unusual = cpit->layout()->bottomsep * dh;
 737                                 }
 738                                 layoutdesc = max(unusual, usual);
 739                         } else if (cpit->getDepth() == nextpit->getDepth()) {
 740                                 if (cpit->layout() != nextpit->layout()
 741                                         || nextpit->getLabelWidthString() != cpit->getLabelWidthString())
 742                                         layoutdesc = int(cpit->layout()->bottomsep * dh);
 743                         }
 744                 }
 745         }
 746
 747         // incalculate the layout spaces
 748         maxasc  += int(layoutasc  * 2 / (2 + pit->getDepth()));
 749         maxdesc += int(layoutdesc * 2 / (2 + pit->getDepth()));
 750
 751         row.height(maxasc + maxdesc + labeladdon);
 752         row.baseline(maxasc + labeladdon);
 753         row.top_of_text(row.baseline() - font_metrics::maxAscent(font));
 754 }
 755
 756
 757 void LyXText::breakParagraph(ParagraphList & paragraphs, char keep_layout)
 758 {
 759         // allow only if at start or end, or all previous is new text
 760         ParagraphList::iterator cpit = cursorPar();
 761         if (cursor.pos() && cursor.pos() != cpit->size()
 762             && cpit->isChangeEdited(0, cursor.pos()))
 763                 return;
 764
 765         LyXTextClass const & tclass =
 766                 bv()->buffer()->params().getLyXTextClass();
 767         LyXLayout_ptr const & layout = cpit->layout();
 768
 769         // this is only allowed, if the current paragraph is not empty or caption
 770         // and if it has not the keepempty flag active
 771         if (cpit->empty() && !cpit->allowEmpty()
 772            && layout->labeltype != LABEL_SENSITIVE)
 773                 return;
 774
 775         recUndo(cursor.par());
 776
 777         // Always break behind a space
 778         //
 779         // It is better to erase the space (Dekel)
 780         if (cursor.pos() < cpit->size() && cpit->isLineSeparator(cursor.pos()))
 781            cpit->erase(cursor.pos());
 782
 783         // break the paragraph
 784         if (keep_layout)
 785                 keep_layout = 2;
 786         else
 787                 keep_layout = layout->isEnvironment();
 788
 789         // we need to set this before we insert the paragraph. IMO the
 790         // breakParagraph call should return a bool if it inserts the
 791         // paragraph before or behind and we should react on that one
 792         // but we can fix this in 1.3.0 (Jug 20020509)
 793         bool const isempty = cpit->allowEmpty() && cpit->empty();
 794         ::breakParagraph(bv()->buffer()->params(), paragraphs, cpit,
 795                          cursor.pos(), keep_layout);
 796
 797 #warning Trouble Point! (Lgb)
 798         // When ::breakParagraph is called from within an inset we must
 799         // ensure that the correct ParagraphList is used. Today that is not
 800         // the case and the Buffer::paragraphs is used. Not good. (Lgb)
 801         cpit = cursorPar();
 802         ParagraphList::iterator next_par = boost::next(cpit);
 803
 804         // well this is the caption hack since one caption is really enough
 805         if (layout->labeltype == LABEL_SENSITIVE) {
 806                 if (!cursor.pos())
 807                         // set to standard-layout
 808                         cpit->applyLayout(tclass.defaultLayout());
 809                 else
 810                         // set to standard-layout
 811                         next_par->applyLayout(tclass.defaultLayout());
 812         }
 813
 814         // if the cursor is at the beginning of a row without prior newline,
 815         // move one row up!
 816         // This touches only the screen-update. Otherwise we would may have
 817         // an empty row on the screen
 818         RowList::iterator crit = cpit->getRow(cursor.pos());
 819         if (cursor.pos() && crit->pos() == cursor.pos()
 820             && !cpit->isNewline(cursor.pos() - 1))
 821         {
 822                 cursorLeft(bv());
 823         }
 824
 825         while (!next_par->empty() && next_par->isNewline(0))
 826                 next_par->erase(0);
 827
 828         updateCounters();
 829         redoParagraph(cpit);
 830         redoParagraph(next_par);
 831
 832         // This check is necessary. Otherwise the new empty paragraph will
 833         // be deleted automatically. And it is more friendly for the user!
 834         if (cursor.pos() || isempty)
 835                 setCursor(next_par, 0);
 836         else
 837                 setCursor(cpit, 0);
 838 }
 839
 840
 841 // convenience function
 842 void LyXText::redoParagraph()
 843 {
 844         clearSelection();
 845         redoParagraph(cursorPar());
 846         setCursorIntern(cursor.par(), cursor.pos());
 847 }
 848
 849
 850 // insert a character, moves all the following breaks in the
 851 // same Paragraph one to the right and make a rebreak
 852 void LyXText::insertChar(char c)
 853 {
 854         recordUndo(Undo::INSERT, this, cursor.par(), cursor.par());
 855
 856         // When the free-spacing option is set for the current layout,
 857         // disable the double-space checking
 858
 859         bool const freeSpacing = cursorPar()->layout()->free_spacing ||
 860                 cursorPar()->isFreeSpacing();
 861
 862         if (lyxrc.auto_number) {
 863                 static string const number_operators = "+-/*";
 864                 static string const number_unary_operators = "+-";
 865                 static string const number_seperators = ".,:";
 866
 867                 if (current_font.number() == LyXFont::ON) {
 868                         if (!IsDigit(c) && !contains(number_operators, c) &&
 869                             !(contains(number_seperators, c) &&
 870                               cursor.pos() >= 1 &&
 871                               cursor.pos() < cursorPar()->size() &&
 872                               getFont(cursorPar(), cursor.pos()).number() == LyXFont::ON &&
 873                               getFont(cursorPar(), cursor.pos() - 1).number() == LyXFont::ON)
 874                            )
 875                                 number(); // Set current_font.number to OFF
 876                 } else if (IsDigit(c) &&
 877                            real_current_font.isVisibleRightToLeft()) {
 878                         number(); // Set current_font.number to ON
 879
 880                         if (cursor.pos() > 0) {
 881                                 char const c = cursorPar()->getChar(cursor.pos() - 1);
 882                                 if (contains(number_unary_operators, c) &&
 883                                     (cursor.pos() == 1 ||
 884                                      cursorPar()->isSeparator(cursor.pos() - 2) ||
 885                                      cursorPar()->isNewline(cursor.pos() - 2))
 886                                   ) {
 887                                         setCharFont(
 888                                                     cursorPar(),
 889                                                     cursor.pos() - 1,
 890                                                     current_font);
 891                                 } else if (contains(number_seperators, c) &&
 892                                            cursor.pos() >= 2 &&
 893                                            getFont(
 894                                                    cursorPar(),
 895                                                    cursor.pos() - 2).number() == LyXFont::ON) {
 896                                         setCharFont(
 897                                                     cursorPar(),
 898                                                     cursor.pos() - 1,
 899                                                     current_font);
 900                                 }
 901                         }
 902                 }
 903         }
 904
 905         // First check, if there will be two blanks together or a blank at
 906         // the beginning of a paragraph.
 907         // I decided to handle blanks like normal characters, the main
 908         // difference are the special checks when calculating the row.fill
 909         // (blank does not count at the end of a row) and the check here
 910
 911         // The bug is triggered when we type in a description environment:
 912         // The current_font is not changed when we go from label to main text
 913         // and it should (along with realtmpfont) when we type the space.
 914         // CHECK There is a bug here! (Asger)
 915
 916         // store the current font.  This is because of the use of cursor
 917         // movements. The moving cursor would refresh the current font
 918         LyXFont realtmpfont = real_current_font;
 919         LyXFont rawtmpfont = current_font;
 920
 921         if (!freeSpacing && IsLineSeparatorChar(c)) {
 922                 if ((cursor.pos() > 0
 923                      && cursorPar()->isLineSeparator(cursor.pos() - 1))
 924                     || (cursor.pos() > 0
 925                         && cursorPar()->isNewline(cursor.pos() - 1))
 926                     || (cursor.pos() == 0)) {
 927                         static bool sent_space_message = false;
 928                         if (!sent_space_message) {
 929                                 if (cursor.pos() == 0)
 930                                         bv()->owner()->message(_("You cannot insert a space at the beginning of a paragraph. Please read the Tutorial."));
 931                                 else
 932                                         bv()->owner()->message(_("You cannot type two spaces this way. Please read the Tutorial."));
 933                                 sent_space_message = true;
 934                         }
 935                         charInserted();
 936                         return;
 937                 }
 938         }
 939
 940         // Here case LyXText::InsertInset already inserted the character
 941         if (c != Paragraph::META_INSET)
 942                 cursorPar()->insertChar(cursor.pos(), c);
 943
 944         setCharFont(cursorPar(), cursor.pos(), rawtmpfont);
 945
 946         current_font = rawtmpfont;
 947         real_current_font = realtmpfont;
 948         redoParagraph(cursorPar());
 949         setCursor(cursor.par(), cursor.pos() + 1, false, cursor.boundary());
 950
 951         charInserted();
 952 }
 953
 954
 955 void LyXText::charInserted()
 956 {
 957         // Here we call finishUndo for every 20 characters inserted.
 958         // This is from my experience how emacs does it. (Lgb)
 959         static unsigned int counter;
 960         if (counter < 20) {
 961                 ++counter;
 962         } else {
 963                 finishUndo();
 964                 counter = 0;
 965         }
 966 }
 967
 968
 969 void LyXText::prepareToPrint(ParagraphList::iterator pit, Row & row) const
 970 {
 971         double w = row.fill();
 972         double fill_hfill = 0;
 973         double fill_label_hfill = 0;
 974         double fill_separator = 0;
 975         double x = 0;
 976
 977         bool const is_rtl =
 978                 pit->isRightToLeftPar(bv()->buffer()->params());
 979         if (is_rtl)
 980                 x = rightMargin(*pit);
 981         else
 982                 x = leftMargin(pit, row.pos());
 983
 984         // is there a manual margin with a manual label
 985         LyXLayout_ptr const & layout = pit->layout();
 986
 987         if (layout->margintype == MARGIN_MANUAL
 988             && layout->labeltype == LABEL_MANUAL) {
 989                 /// We might have real hfills in the label part
 990                 int nlh = numberOfLabelHfills(*pit, row);
 991
 992                 // A manual label par (e.g. List) has an auto-hfill
 993                 // between the label text and the body of the
 994                 // paragraph too.
 995                 // But we don't want to do this auto hfill if the par
 996                 // is empty.
 997                 if (!pit->empty())
 998                         ++nlh;
 999
1000                 if (nlh && !pit->getLabelWidthString().empty())
1001                         fill_label_hfill = labelFill(pit, row) / double(nlh);
1002         }
1003
1004         // are there any hfills in the row?
1005         int const nh = numberOfHfills(*pit, row);
1006
1007         if (nh) {
1008                 if (w > 0)
1009                         fill_hfill = w / nh;
1010         // we don't have to look at the alignment if it is ALIGN_LEFT and
1011         // if the row is already larger then the permitted width as then
1012         // we force the LEFT_ALIGN'edness!
1013         } else if (int(row.width()) < textWidth()) {
1014                 // is it block, flushleft or flushright?
1015                 // set x how you need it
1016                 int align;
1017                 if (pit->params().align() == LYX_ALIGN_LAYOUT)
1018                         align = layout->align;
1019                 else
1020                         align = pit->params().align();
1021
1022                 // Display-style insets should always be on a centred row
1023                 // The test on pit->size() is to catch zero-size pars, which
1024                 // would trigger the assert in Paragraph::getInset().
1025                 //inset = pit->size() ? pit->getInset(row.pos()) : 0;
1026                 if (!pit->empty()
1027                     && pit->isInset(row.pos())
1028                     && pit->getInset(row.pos())->display())
1029                 {
1030                         align = LYX_ALIGN_CENTER;
1031                 }
1032
1033                 switch (align) {
1034     case LYX_ALIGN_BLOCK: {
1035                                 int const ns = numberOfSeparators(*pit, row);
1036                                 bool disp_inset = false;
1037                                 if (row.endpos() < pit->size()) {
1038                                         InsetOld * in = pit->getInset(row.endpos());
1039                                         if (in)
1040                                                 disp_inset = in->display();
1041                                 }
1042                                 // If we have separators, this is not the last row of a
1043                                 // par, does not end in newline, and is not row above a
1044                                 // display inset... then stretch it
1045                                 if (ns
1046                                         && row.endpos() < pit->size()
1047                                         && !pit->isNewline(row.endpos() - 1)
1048                                         && !disp_inset
1049                                         ) {
1050                                                 fill_separator = w / ns;
1051                                 } else if (is_rtl) {
1052                                         x += w;
1053                                 }
1054                                 break;
1055                         }
1056     case LYX_ALIGN_RIGHT:
1057                         x += w;
1058                         break;
1059     case LYX_ALIGN_CENTER:
1060                         x += w / 2;
1061                         break;
1062                 }
1063         }
1064
1065         bidi.computeTables(*pit, *bv()->buffer(), row);
1066         if (is_rtl) {
1067                 pos_type body_pos = pit->beginOfBody();
1068                 pos_type end = row.endpos();
1069
1070                 if (body_pos > 0
1071                     && (body_pos > end || !pit->isLineSeparator(body_pos - 1)))
1072                 {
1073                         x += font_metrics::width(layout->labelsep, getLabelFont(pit));
1074                         if (body_pos <= end)
1075                                 x += fill_label_hfill;
1076                 }
1077         }
1078
1079         row.fill_hfill(fill_hfill);
1080         row.fill_label_hfill(fill_label_hfill);
1081         row.fill_separator(fill_separator);
1082         row.x(x);
1083 }
1084
1085
1086 // the cursor set functions have a special mechanism. When they
1087 // realize, that you left an empty paragraph, they will delete it.
1088
1089 void LyXText::cursorRightOneWord()
1090 {
1091         cursorRightOneWord(cursor);
1092         setCursor(cursorPar(), cursor.pos());
1093 }
1094
1095
1096 // Skip initial whitespace at end of word and move cursor to *start*
1097 // of prior word, not to end of next prior word.
1098 void LyXText::cursorLeftOneWord()
1099 {
1100         LyXCursor tmpcursor = cursor;
1101         cursorLeftOneWord(tmpcursor);
1102         setCursor(getPar(tmpcursor), tmpcursor.pos());
1103 }
1104
1105
1106 void LyXText::selectWord(word_location loc)
1107 {
1108         LyXCursor from = cursor;
1109         LyXCursor to = cursor;
1110         getWord(from, to, loc);
1111         if (cursor != from)
1112                 setCursor(from.par(), from.pos());
1113         if (to == from)
1114                 return;
1115         selection.cursor = cursor;
1116         setCursor(to.par(), to.pos());
1117         setSelection();
1118 }
1119
1120
1121 // Select the word currently under the cursor when no
1122 // selection is currently set
1123 bool LyXText::selectWordWhenUnderCursor(word_location loc)
1124 {
1125         if (!selection.set()) {
1126                 selectWord(loc);
1127                 return selection.set();
1128         }
1129         return false;
1130 }
1131
1132
1133 void LyXText::acceptChange()
1134 {
1135         if (!selection.set() && cursorPar()->size())
1136                 return;
1137
1138         if (selection.start.par() == selection.end.par()) {
1139                 LyXCursor & startc = selection.start;
1140                 LyXCursor & endc = selection.end;
1141                 recordUndo(Undo::INSERT, this, startc.par());
1142                 getPar(startc)->acceptChange(startc.pos(), endc.pos());
1143                 finishUndo();
1144                 clearSelection();
1145                 redoParagraph(getPar(startc));
1146                 setCursorIntern(startc.par(), 0);
1147         }
1148 #warning handle multi par selection
1149 }
1150
1151
1152 void LyXText::rejectChange()
1153 {
1154         if (!selection.set() && cursorPar()->size())
1155                 return;
1156
1157         if (selection.start.par() == selection.end.par()) {
1158                 LyXCursor & startc = selection.start;
1159                 LyXCursor & endc = selection.end;
1160                 recordUndo(Undo::INSERT, this, startc.par());
1161                 getPar(startc)->rejectChange(startc.pos(), endc.pos());
1162                 finishUndo();
1163                 clearSelection();
1164                 redoParagraph(getPar(startc));
1165                 setCursorIntern(startc.par(), 0);
1166         }
1167 #warning handle multi par selection
1168 }
1169
1170
1171 // Delete from cursor up to the end of the current or next word.
1172 void LyXText::deleteWordForward()
1173 {
1174         if (cursorPar()->empty())
1175                 cursorRight(bv());
1176         else {
1177                 LyXCursor tmpcursor = cursor;
1178                 selection.set(true); // to avoid deletion
1179                 cursorRightOneWord();
1180                 setCursor(tmpcursor, tmpcursor.par(), tmpcursor.pos());
1181                 selection.cursor = cursor;
1182                 cursor = tmpcursor;
1183                 setSelection();
1184                 cutSelection(true, false);
1185         }
1186 }
1187
1188
1189 // Delete from cursor to start of current or prior word.
1190 void LyXText::deleteWordBackward()
1191 {
1192         if (cursorPar()->empty())
1193                 cursorLeft(bv());
1194         else {
1195                 LyXCursor tmpcursor = cursor;
1196                 selection.set(true); // to avoid deletion
1197                 cursorLeftOneWord();
1198                 setCursor(tmpcursor, tmpcursor.par(), tmpcursor.pos());
1199                 selection.cursor = cursor;
1200                 cursor = tmpcursor;
1201                 setSelection();
1202                 cutSelection(true, false);
1203         }
1204 }
1205
1206
1207 // Kill to end of line.
1208 void LyXText::deleteLineForward()
1209 {
1210         if (cursorPar()->empty()) {
1211                 // Paragraph is empty, so we just go to the right
1212                 cursorRight(bv());
1213         } else {
1214                 LyXCursor tmpcursor = cursor;
1215                 // We can't store the row over a regular setCursor
1216                 // so we set it to 0 and reset it afterwards.
1217                 selection.set(true); // to avoid deletion
1218                 cursorEnd();
1219                 setCursor(tmpcursor, tmpcursor.par(), tmpcursor.pos());
1220                 selection.cursor = cursor;
1221                 cursor = tmpcursor;
1222                 setSelection();
1223                 // What is this test for ??? (JMarc)
1224                 if (!selection.set())
1225                         deleteWordForward();
1226                 else
1227                         cutSelection(true, false);
1228         }
1229 }
1230
1231
1232 void LyXText::changeCase(LyXText::TextCase action)
1233 {
1234         LyXCursor from;
1235         LyXCursor to;
1236
1237         if (selection.set()) {
1238                 from = selection.start;
1239                 to = selection.end;
1240         } else {
1241                 from = cursor;
1242                 getWord(from, to, lyx::PARTIAL_WORD);
1243                 setCursor(to.par(), to.pos() + 1);
1244         }
1245
1246         recordUndo(Undo::ATOMIC, this, from.par(), to.par());
1247
1248         pos_type pos = from.pos();
1249         int par = from.par();
1250
1251         while (par != int(ownerParagraphs().size()) &&
1252                (pos != to.pos() || par != to.par())) {
1253                 ParagraphList::iterator pit = getPar(par);
1254                 if (pos == pit->size()) {
1255                         ++par;
1256                         pos = 0;
1257                         continue;
1258                 }
1259                 unsigned char c = pit->getChar(pos);
1260                 if (c != Paragraph::META_INSET) {
1261                         switch (action) {
1262                         case text_lowercase:
1263                                 c = lowercase(c);
1264                                 break;
1265                         case text_capitalization:
1266                                 c = uppercase(c);
1267                                 action = text_lowercase;
1268                                 break;
1269                         case text_uppercase:
1270                                 c = uppercase(c);
1271                                 break;
1272                         }
1273                 }
1274 #warning changes
1275                 pit->setChar(pos, c);
1276                 ++pos;
1277         }
1278 }
1279
1280
1281 void LyXText::Delete()
1282 {
1283         // this is a very easy implementation
1284         LyXCursor old_cursor = cursor;
1285
1286         // just move to the right
1287         cursorRight(true);
1288
1289         // if you had success make a backspace
1290         if (old_cursor.par() != cursor.par() || old_cursor.pos() != cursor.pos()) {
1291                 recordUndo(Undo::DELETE, this, old_cursor.par());
1292                 backspace();
1293         }
1294 }
1295
1296
1297 void LyXText::backspace()
1298 {
1299         // Get the font that is used to calculate the baselineskip
1300         ParagraphList::iterator pit = cursorPar();
1301         pos_type lastpos = pit->size();
1302
1303         if (cursor.pos() == 0) {
1304                 // The cursor is at the beginning of a paragraph,
1305                 // so the the backspace will collapse two paragraphs into one.
1306
1307                 // but it's not allowed unless it's new
1308                 if (pit->isChangeEdited(0, pit->size()))
1309                         return;
1310
1311                 // we may paste some paragraphs
1312
1313                 // is it an empty paragraph?
1314
1315                 if (lastpos == 0 || (lastpos == 1 && pit->isSeparator(0))) {
1316                         // This is an empty paragraph and we delete it just
1317                         // by moving the cursor one step
1318                         // left and let the DeleteEmptyParagraphMechanism
1319                         // handle the actual deletion of the paragraph.
1320
1321                         if (cursor.par()) {
1322                                 ParagraphList::iterator tmppit = getPar(cursor.par() - 1);
1323                                 if (cursorPar()->layout() == tmppit->layout()
1324                                     && cursorPar()->getAlign() == tmppit->getAlign()) {
1325                                         // Inherit bottom DTD from the paragraph below.
1326                                         // (the one we are deleting)
1327                                         tmppit->params().spaceBottom(cursorPar()->params().spaceBottom());
1328                                 }
1329
1330                                 cursorLeft(bv());
1331
1332                                 // the layout things can change the height of a row !
1333                                 redoParagraph();
1334                                 return;
1335                         }
1336                 }
1337
1338                 if (cursor.par() != 0)
1339                         recordUndo(Undo::DELETE, this, cursor.par() - 1, cursor.par());
1340
1341                 ParagraphList::iterator tmppit = cursorPar();
1342                 // We used to do cursorLeftIntern() here, but it is
1343                 // not a good idea since it triggers the auto-delete
1344                 // mechanism. So we do a cursorLeftIntern()-lite,
1345                 // without the dreaded mechanism. (JMarc)
1346                 if (cursor.par() != 0) {
1347                         // steps into the above paragraph.
1348                         setCursorIntern(cursor.par() - 1,
1349                                         getPar(cursor.par() - 1)->size(),
1350                                         false);
1351                 }
1352
1353                 // Pasting is not allowed, if the paragraphs have different
1354                 // layout. I think it is a real bug of all other
1355                 // word processors to allow it. It confuses the user.
1356                 // Correction: Pasting is always allowed with standard-layout
1357                 Buffer & buf = *bv()->buffer();
1358                 BufferParams const & bufparams = buf.params();
1359                 LyXTextClass const & tclass = bufparams.getLyXTextClass();
1360                 ParagraphList::iterator const cpit = cursorPar();
1361
1362                 if (cpit != tmppit
1363                     && (cpit->layout() == tmppit->layout()
1364                         || tmppit->layout() == tclass.defaultLayout())
1365                     && cpit->getAlign() == tmppit->getAlign()) {
1366                         mergeParagraph(bufparams, buf.paragraphs(), cpit);
1367
1368                         if (cursor.pos() && cpit->isSeparator(cursor.pos() - 1))
1369                                 cursor.pos(cursor.pos() - 1);
1370
1371                         // the counters may have changed
1372                         updateCounters();
1373                         setCursor(cursor.par(), cursor.pos(), false);
1374                 }
1375         } else {
1376                 // this is the code for a normal backspace, not pasting
1377                 // any paragraphs
1378                 recordUndo(Undo::DELETE, this, cursor.par());
1379                 // We used to do cursorLeftIntern() here, but it is
1380                 // not a good idea since it triggers the auto-delete
1381                 // mechanism. So we do a cursorLeftIntern()-lite,
1382                 // without the dreaded mechanism. (JMarc)
1383                 setCursorIntern(cursor.par(), cursor.pos() - 1,
1384                                 false, cursor.boundary());
1385                 cursorPar()->erase(cursor.pos());
1386         }
1387
1388         lastpos = cursorPar()->size();
1389         if (cursor.pos() == lastpos)
1390                 setCurrentFont();
1391
1392         redoParagraph();
1393         setCursor(cursor.par(), cursor.pos(), false, cursor.boundary());
1394 }
1395
1396
1397 ParagraphList::iterator LyXText::cursorPar() const
1398 {
1399         return getPar(cursor.par());
1400 }
1401
1402
1403 RowList::iterator LyXText::cursorRow() const
1404 {
1405         return cursorPar()->getRow(cursor.pos());
1406 }
1407
1408
1409 ParagraphList::iterator LyXText::getPar(LyXCursor const & cur) const
1410 {
1411         return getPar(cur.par());
1412 }
1413
1414
1415 ParagraphList::iterator LyXText::getPar(int par) const
1416 {
1417         BOOST_ASSERT(par >= 0);
1418         BOOST_ASSERT(par < int(ownerParagraphs().size()));
1419         ParagraphList::iterator pit = ownerParagraphs().begin();
1420         std::advance(pit, par);
1421         return pit;
1422 }
1423
1424
1425 RowList::iterator
1426 LyXText::getRowNearY(int y, ParagraphList::iterator & pit) const
1427 {
1428         //lyxerr << "getRowNearY: y " << y << endl;
1429 #if 1
1430         ParagraphList::iterator const
1431                 pend = boost::prior(ownerParagraphs().end());
1432         pit = ownerParagraphs().begin();
1433         while (int(pit->y + pit->height) < y && pit != pend)
1434                 ++pit;
1435
1436         RowList::iterator rit = pit->rows.end();
1437         RowList::iterator const rbegin = pit->rows.begin();
1438         do {
1439                 --rit;
1440         } while (rit != rbegin && int(pit->y + rit->y_offset()) > y);
1441
1442         return rit;
1443 #else
1444         pit = boost::prior(ownerParagraphs().end());
1445
1446         RowList::iterator rit = lastRow();
1447         RowList::iterator rbegin = firstRow();
1448
1449         while (rit != rbegin && int(pit->y + rit->y_offset()) > y)
1450                 previousRow(pit, rit);
1451
1452         return rit;
1453 #endif
1454 }
1455
1456
1457 int LyXText::getDepth() const
1458 {
1459         return cursorPar()->getDepth();
1460 }
1461
1462
1463 RowList::iterator LyXText::firstRow() const
1464 {
1465         return ownerParagraphs().front().rows.begin();
1466 }
1467
1468
1469 ParagraphList::iterator LyXText::firstPar() const
1470 {
1471         return ownerParagraphs().begin();
1472 }
1473
1474
1475 RowList::iterator LyXText::lastRow() const
1476 {
1477         return boost::prior(endRow());
1478 }
1479
1480
1481 ParagraphList::iterator LyXText::lastPar() const
1482 {
1483         return boost::prior(endPar());
1484 }
1485
1486
1487 RowList::iterator LyXText::endRow() const
1488 {
1489         return ownerParagraphs().back().rows.end();
1490 }
1491
1492
1493 ParagraphList::iterator LyXText::endPar() const
1494 {
1495         return ownerParagraphs().end();
1496 }
1497
1498
1499 void LyXText::nextRow(ParagraphList::iterator & pit,
1500         RowList::iterator & rit) const
1501 {
1502         ++rit;
1503         if (rit == pit->rows.end()) {
1504                 ++pit;
1505                 if (pit == ownerParagraphs().end())
1506                         --pit;
1507                 else
1508                         rit = pit->rows.begin();
1509         }
1510 }
1511
1512
1513 void LyXText::previousRow(ParagraphList::iterator & pit,
1514         RowList::iterator & rit) const
1515 {
1516         if (rit != pit->rows.begin())
1517                 --rit;
1518         else {
1519                 BOOST_ASSERT(pit != ownerParagraphs().begin());
1520                 --pit;
1521                 rit = boost::prior(pit->rows.end());
1522         }
1523 }
1524
1525
1526 string LyXText::selectionAsString(Buffer const & buffer, bool label) const
1527 {
1528         if (!selection.set())
1529                 return string();
1530
1531         // should be const ...
1532         ParagraphList::iterator startpit = getPar(selection.start);
1533         ParagraphList::iterator endpit = getPar(selection.end);
1534         size_t const startpos = selection.start.pos();
1535         size_t const endpos = selection.end.pos();
1536
1537         if (startpit == endpit)
1538                 return startpit->asString(buffer, startpos, endpos, label);
1539
1540         // First paragraph in selection
1541         string result =
1542                 startpit->asString(buffer, startpos, startpit->size(), label) + "\n\n";
1543
1544         // The paragraphs in between (if any)
1545         ParagraphList::iterator pit = startpit;
1546         for (++pit; pit != endpit; ++pit)
1547                 result += pit->asString(buffer, 0, pit->size(), label) + "\n\n";
1548
1549         // Last paragraph in selection
1550         result += endpit->asString(buffer, 0, endpos, label);
1551
1552         return result;
1553 }
1554
1555
1556 int LyXText::parOffset(ParagraphList::iterator pit) const
1557 {
1558         return std::distance(ownerParagraphs().begin(), pit);
1559 }
1560
1561
1562 void LyXText::redoParagraphInternal(ParagraphList::iterator pit)
1563 {
1564         // remove rows of paragraph, keep track of height changes
1565         height -= pit->height;
1566
1567         // clear old data
1568         pit->rows.clear();
1569         pit->height = 0;
1570         pit->width = 0;
1571
1572         // redo insets
1573         InsetList::iterator ii = pit->insetlist.begin();
1574         InsetList::iterator iend = pit->insetlist.end();
1575         for (; ii != iend; ++ii) {
1576                 Dimension dim;
1577                 int const w = textWidth() - leftMargin(pit) - rightMargin(*pit);
1578                 MetricsInfo mi(bv(), getFont(pit, ii->pos), w);
1579                 ii->inset->metrics(mi, dim);
1580         }
1581
1582         // rebreak the paragraph
1583         pit->setBeginOfBody();
1584         pos_type z = 0;
1585         do {
1586                 Row row(z);
1587                 rowBreakPoint(pit, row);
1588                 z = row.endpos();
1589                 fill(pit, row, textwidth_);
1590                 prepareToPrint(pit, row);
1591                 setHeightOfRow(pit, row);
1592                 row.y_offset(pit->height);
1593                 pit->rows.push_back(row);
1594                 pit->width = std::max(pit->width, row.width());
1595                 pit->height += row.height();
1596         } while (z < pit->size());
1597
1598         height += pit->height;
1599         //lyxerr << "redoParagraph: " << pit->rows.size() << " rows\n";
1600 }
1601
1602
1603 void LyXText::redoParagraphs(ParagraphList::iterator pit,
1604   ParagraphList::iterator end)
1605 {
1606         for ( ; pit != end; ++pit)
1607                 redoParagraphInternal(pit);
1608         updateParPositions();
1609 }
1610
1611
1612 void LyXText::redoParagraph(ParagraphList::iterator pit)
1613 {
1614         redoParagraphInternal(pit);
1615         updateParPositions();
1616 }
1617
1618
1619 void LyXText::fullRebreak()
1620 {
1621         redoParagraphs(ownerParagraphs().begin(), ownerParagraphs().end());
1622         redoCursor();
1623         selection.cursor = cursor;
1624 }
1625
1626
1627 void LyXText::metrics(MetricsInfo & mi, Dimension & dim)
1628 {
1629         //BOOST_ASSERT(mi.base.textwidth);
1630         if (mi.base.textwidth)
1631                 textwidth_ = mi.base.textwidth;
1632         //lyxerr << "LyXText::metrics: width: " << mi.base.textwidth
1633         //      << " textWidth: " << textWidth() << "\nfont: " << mi.base.font << endl;
1634
1635         // Rebuild row cache. This recomputes height as well.
1636         redoParagraphs(ownerParagraphs().begin(), ownerParagraphs().end());
1637
1638         width = maxParagraphWidth(ownerParagraphs());
1639
1640         // final dimension
1641         dim.asc = firstRow()->ascent_of_text();
1642         dim.des = height - dim.asc;
1643         dim.wid = std::max(mi.base.textwidth, int(width));
1644 }
1645
1646
1647 // only used for inset right now. should also be used for main text
1648 void LyXText::draw(PainterInfo & pi, int x, int y) const
1649 {
1650         xo_ = x;
1651         yo_ = y;
1652         paintTextInset(*bv(), *this, x, y);
1653 }
1654
1655
1656 bool LyXText::isLastRow(ParagraphList::iterator pit, Row const & row) const
1657 {
1658         return row.endpos() >= pit->size()
1659                && boost::next(pit) == ownerParagraphs().end();
1660 }
1661
1662
1663 bool LyXText::isFirstRow(ParagraphList::iterator pit, Row const & row) const
1664 {
1665         return row.pos() == 0 && pit == ownerParagraphs().begin();
1666 }
1667
1668
1669 void LyXText::cursorLeftOneWord(LyXCursor & cursor)
1670 {
1671         // treat HFills, floats and Insets as words
1672
1673         ParagraphList::iterator pit = cursorPar();
1674         size_t pos = cursor.pos();
1675
1676         while (pos &&
1677                (pit->isSeparator(pos - 1) ||
1678                 pit->isKomma(pos - 1) ||
1679                 pit->isNewline(pos - 1)) &&
1680                !(pit->isHfill(pos - 1) ||
1681                  pit->isInset(pos - 1)))
1682                 --pos;
1683
1684         if (pos &&
1685             (pit->isInset(pos - 1) ||
1686              pit->isHfill(pos - 1))) {
1687                 --pos;
1688         } else if (!pos) {
1689                 if (pit != ownerParagraphs().begin()) {
1690                         --pit;
1691                         pos = pit->size();
1692                 }
1693         } else {                // Here, cur != 0
1694                 while (pos > 0 && pit->isWord(pos - 1))
1695                         --pos;
1696         }
1697
1698         cursor.par(parOffset(pit));
1699         cursor.pos(pos);
1700 }
1701
1702
1703 void LyXText::cursorRightOneWord(LyXCursor & cursor)
1704 {
1705         // treat floats, HFills and Insets as words
1706         ParagraphList::iterator pit = cursorPar();
1707         pos_type pos = cursor.pos();
1708
1709         if (pos == pit->size() &&
1710                 boost::next(pit) != ownerParagraphs().end()) {
1711                 ++pit;
1712                 pos = 0;
1713         } else {
1714                 // Skip through initial nonword stuff.
1715                 while (pos < pit->size() && !pit->isWord(pos)) {
1716                         ++pos;
1717                 }
1718                 // Advance through word.
1719                 while (pos < pit->size() && pit->isWord(pos)) {
1720                         ++pos;
1721                 }
1722         }
1723
1724         cursor.par(parOffset(pit));
1725         cursor.pos(pos);
1726 }
1727
1728
1729 void LyXText::getWord(LyXCursor & from, LyXCursor & to, word_location const loc)
1730 {
1731         ParagraphList::iterator from_par = getPar(from);
1732         ParagraphList::iterator to_par = getPar(to);
1733         switch (loc) {
1734         case lyx::WHOLE_WORD_STRICT:
1735                 if (from.pos() == 0 || from.pos() == from_par->size()
1736                     || from_par->isSeparator(from.pos())
1737                     || from_par->isKomma(from.pos())
1738                     || from_par->isNewline(from.pos())
1739                     || from_par->isSeparator(from.pos() - 1)
1740                     || from_par->isKomma(from.pos() - 1)
1741                     || from_par->isNewline(from.pos() - 1)) {
1742                         to = from;
1743                         return;
1744                 }
1745                 // no break here, we go to the next
1746
1747         case lyx::WHOLE_WORD:
1748                 // Move cursor to the beginning, when not already there.
1749                 if (from.pos() && !from_par->isSeparator(from.pos() - 1)
1750                     && !(from_par->isKomma(from.pos() - 1)
1751                          || from_par->isNewline(from.pos() - 1)))
1752                         cursorLeftOneWord(from);
1753                 break;
1754         case lyx::PREVIOUS_WORD:
1755                 // always move the cursor to the beginning of previous word
1756                 cursorLeftOneWord(from);
1757                 break;
1758         case lyx::NEXT_WORD:
1759                 lyxerr << "LyXText::getWord: NEXT_WORD not implemented yet"
1760                        << endl;
1761                 break;
1762         case lyx::PARTIAL_WORD:
1763                 break;
1764         }
1765         to = from;
1766         while (to.pos() < to_par->size()
1767                && !to_par->isSeparator(to.pos())
1768                && !to_par->isKomma(to.pos())
1769                && !to_par->isNewline(to.pos())
1770                && !to_par->isHfill(to.pos())
1771                && !to_par->isInset(to.pos()))
1772         {
1773                 to.pos(to.pos() + 1);
1774         }
1775 }