src/rowpainter.C

   1 /**
   2  * \file rowpainter.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author various
   7  * \author John Levon
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "rowpainter.h"
  15
  16 #include "buffer.h"
  17 #include "debug.h"
  18 #include "bufferparams.h"
  19 #include "BufferView.h"
  20 #include "encoding.h"
  21 #include "gettext.h"
  22 #include "language.h"
  23 #include "LColor.h"
  24 #include "lyxrc.h"
  25 #include "lyxrow.h"
  26 #include "lyxrow_funcs.h"
  27 #include "metricsinfo.h"
  28 #include "paragraph.h"
  29 #include "paragraph_funcs.h"
  30 #include "ParagraphParameters.h"
  31 #include "vspace.h"
  32
  33 #include "frontends/font_metrics.h"
  34 #include "frontends/Painter.h"
  35
  36 #include "insets/insettext.h"
  37
  38 #include "support/textutils.h"
  39
  40
  41 using lyx::pos_type;
  42 using std::max;
  43 using std::string;
  44
  45 extern int PAPER_MARGIN;
  46 extern int CHANGEBAR_MARGIN;
  47 extern int LEFT_MARGIN;
  48
  49 namespace {
  50
  51 // "temporary". We'll never get to use more
  52 // references until we start adding hacks like
  53 // these until other places catch up.
  54 BufferView * perv(BufferView const & bv)
  55 {
  56         return const_cast<BufferView *>(&bv);
  57 }
  58
  59 /**
  60  * A class used for painting an individual row of text.
  61  */
  62 class RowPainter {
  63 public:
  64         /// initialise painter
  65         RowPainter(BufferView const & bv, LyXText const & text,
  66                 ParagraphList::iterator pit,
  67                 RowList::iterator rit, int y_offset, int x_offset, int y);
  68
  69         /// do the painting
  70         void paint();
  71 private:
  72         // paint various parts
  73         void paintBackground();
  74         void paintSelection();
  75         void paintAppendix();
  76         void paintDepthBar();
  77         void paintChangeBar();
  78         void paintFirst();
  79         void paintLast();
  80         void paintForeignMark(double orig_x, LyXFont const & orig_font);
  81         void paintHebrewComposeChar(lyx::pos_type & vpos);
  82         void paintArabicComposeChar(lyx::pos_type & vpos);
  83         void paintChars(lyx::pos_type & vpos, bool hebrew, bool arabic);
  84         int paintAppendixStart(int y);
  85         int paintLengthMarker(string const & prefix, VSpace const & vsp, int start);
  86         void paintText();
  87         void paintFromPos(lyx::pos_type & vpos);
  88         void paintInset(lyx::pos_type const pos);
  89
  90         /// return left margin
  91         int leftMargin() const;
  92
  93         /// return the font at the given pos
  94         LyXFont const getFont(lyx::pos_type pos) const;
  95
  96         /// return the label font for this row
  97         LyXFont const getLabelFont() const;
  98
  99         /// return pixel width for the given pos
 100         int singleWidth(lyx::pos_type pos) const;
 101         int singleWidth(lyx::pos_type pos, char c) const;
 102
 103         /// bufferview to paint on
 104         BufferView const & bv_;
 105
 106         /// Painter to use
 107         Painter & pain_;
 108
 109         /// LyXText for the row
 110         LyXText const & text_;
 111
 112         /// The row to paint
 113         RowList::iterator const rit_;
 114         Row & row_;
 115
 116         /// Row's paragraph
 117         mutable ParagraphList::iterator  pit_;
 118
 119         // Looks ugly - is
 120         double xo_;
 121         int yo_;
 122         double x_;
 123         int y_;
 124         int width_;
 125         double separator_;
 126         double hfill_;
 127         double label_hfill_;
 128 };
 129
 130
 131 RowPainter::RowPainter(BufferView const & bv, LyXText const & text,
 132      ParagraphList::iterator pit, RowList::iterator rit,
 133      int y_offset, int x_offset, int y)
 134         : bv_(bv), pain_(bv_.painter()), text_(text), rit_(rit), row_(*rit),
 135           pit_(pit), xo_(x_offset), yo_(y_offset),
 136                 x_(row_.x()), y_(y),
 137                 width_(text_.workWidth()),
 138                 separator_(row_.fill_separator()),
 139                 hfill_(row_.fill_hfill()),
 140                 label_hfill_(row_.fill_label_hfill())
 141 {}
 142
 143
 144 /// "temporary"
 145 LyXFont const RowPainter::getFont(pos_type pos) const
 146 {
 147         return text_.getFont(pit_, pos);
 148 }
 149
 150
 151 int RowPainter::singleWidth(lyx::pos_type pos) const
 152 {
 153         return text_.singleWidth(pit_, pos);
 154 }
 155
 156
 157 int RowPainter::singleWidth(lyx::pos_type pos, char c) const
 158 {
 159         LyXFont const & font = text_.getFont(pit_, pos);
 160         return text_.singleWidth(pit_, pos, c, font);
 161 }
 162
 163
 164 LyXFont const RowPainter::getLabelFont() const
 165 {
 166         return text_.getLabelFont(pit_);
 167 }
 168
 169
 170 int RowPainter::leftMargin() const
 171 {
 172         return text_.leftMargin(pit_, row_);
 173 }
 174
 175
 176 void RowPainter::paintInset(pos_type const pos)
 177 {
 178         InsetOld * inset = const_cast<InsetOld*>(pit_->getInset(pos));
 179
 180         BOOST_ASSERT(inset);
 181
 182         PainterInfo pi(perv(bv_));
 183         pi.base.font = getFont(pos);
 184         inset->draw(pi, int(x_), yo_ + row_.baseline());
 185         x_ += inset->width();
 186 }
 187
 188
 189 void RowPainter::paintHebrewComposeChar(pos_type & vpos)
 190 {
 191         pos_type pos = text_.bidi.vis2log(vpos);
 192
 193         string str;
 194
 195         // first char
 196         char c = pit_->getChar(pos);
 197         str += c;
 198         ++vpos;
 199
 200         LyXFont const & font = getFont(pos);
 201         int const width = font_metrics::width(c, font);
 202         int dx = 0;
 203
 204         for (pos_type i = pos - 1; i >= 0; --i) {
 205                 c = pit_->getChar(i);
 206                 if (!Encodings::IsComposeChar_hebrew(c)) {
 207                         if (IsPrintableNonspace(c)) {
 208                                 int const width2 = singleWidth(i, c);
 209                                 // dalet / resh
 210                                 dx = (c == 'ø' || c == 'ã')
 211                                         ? width2 - width
 212                                         : (width2 - width) / 2;
 213                         }
 214                         break;
 215                 }
 216         }
 217
 218         // Draw nikud
 219         pain_.text(int(x_) + dx, yo_ + row_.baseline(), str, font);
 220 }
 221
 222
 223 void RowPainter::paintArabicComposeChar(pos_type & vpos)
 224 {
 225         pos_type pos = text_.bidi.vis2log(vpos);
 226         string str;
 227
 228         // first char
 229         char c = pit_->getChar(pos);
 230         c = pit_->transformChar(c, pos);
 231         str +=c;
 232         ++vpos;
 233
 234         LyXFont const & font = getFont(pos);
 235         int const width = font_metrics::width(c, font);
 236         int dx = 0;
 237
 238         for (pos_type i = pos - 1; i >= 0; --i) {
 239                 c = pit_->getChar(i);
 240                 if (!Encodings::IsComposeChar_arabic(c)) {
 241                         if (IsPrintableNonspace(c)) {
 242                                 int const width2 = singleWidth(i, c);
 243                                 dx = (width2 - width) / 2;
 244                         }
 245                         break;
 246                 }
 247         }
 248         // Draw nikud
 249         pain_.text(int(x_) + dx, yo_ + row_.baseline(), str, font);
 250 }
 251
 252
 253 void RowPainter::paintChars(pos_type & vpos, bool hebrew, bool arabic)
 254 {
 255         pos_type pos = text_.bidi.vis2log(vpos);
 256         pos_type const end = row_.endpos();
 257         LyXFont orig_font = getFont(pos);
 258
 259         // first character
 260         string str;
 261         str += pit_->getChar(pos);
 262         if (arabic) {
 263                 unsigned char c = str[0];
 264                 str[0] = pit_->transformChar(c, pos);
 265         }
 266
 267         bool prev_struckout = isDeletedText(*pit_, pos);
 268         bool prev_newtext = isInsertedText(*pit_, pos);
 269
 270         ++vpos;
 271
 272         // collect as much similar chars as we can
 273         while (vpos < end && (pos = text_.bidi.vis2log(vpos)) >= 0) {
 274                 char c = pit_->getChar(pos);
 275
 276                 if (!IsPrintableNonspace(c))
 277                         break;
 278
 279                 if (prev_struckout != isDeletedText(*pit_, pos))
 280                         break;
 281
 282                 if (prev_newtext != isInsertedText(*pit_, pos))
 283                         break;
 284
 285                 if (arabic && Encodings::IsComposeChar_arabic(c))
 286                         break;
 287
 288                 if (hebrew && Encodings::IsComposeChar_hebrew(c))
 289                         break;
 290
 291                 if (orig_font != getFont(pos))
 292                         break;
 293
 294                 if (arabic)
 295                         c = pit_->transformChar(c, pos);
 296                 str += c;
 297                 ++vpos;
 298         }
 299
 300         if (prev_struckout)
 301                 orig_font.setColor(LColor::strikeout);
 302         else if (prev_newtext)
 303                 orig_font.setColor(LColor::newtext);
 304
 305         // Draw text and set the new x position
 306         //lyxerr << "paint row: yo_ " << yo_ << " baseline: " << row_.baseline()
 307         //      << "\n";
 308         pain_.text(int(x_), yo_ + row_.baseline(), str, orig_font);
 309         x_ += font_metrics::width(str, orig_font);
 310 }
 311
 312
 313 void RowPainter::paintForeignMark(double orig_x, LyXFont const & orig_font)
 314 {
 315         if (!lyxrc.mark_foreign_language)
 316                 return;
 317         if (orig_font.language() == latex_language)
 318                 return;
 319         if (orig_font.language() == bv_.buffer()->params().language)
 320                 return;
 321
 322         int const y = yo_ + row_.baseline() + 1;
 323         pain_.line(int(orig_x), y, int(x_), y, LColor::language);
 324 }
 325
 326
 327 void RowPainter::paintFromPos(pos_type & vpos)
 328 {
 329         pos_type const pos = text_.bidi.vis2log(vpos);
 330
 331         LyXFont const & orig_font = getFont(pos);
 332
 333         double const orig_x = x_;
 334
 335         char const c = pit_->getChar(pos);
 336
 337         if (c == Paragraph::META_INSET) {
 338                 paintInset(pos);
 339                 ++vpos;
 340                 paintForeignMark(orig_x, orig_font);
 341                 return;
 342         }
 343
 344         // usual characters, no insets
 345
 346         // special case languages
 347         bool const hebrew = (orig_font.language()->lang() == "hebrew");
 348         bool const arabic =
 349                 orig_font.language()->lang() == "arabic" &&
 350                 (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 351                 lyxrc.font_norm_type == LyXRC::ISO_10646_1);
 352
 353         // draw as many chars as we can
 354         if ((!hebrew && !arabic)
 355                 || (hebrew && !Encodings::IsComposeChar_hebrew(c))
 356                 || (arabic && !Encodings::IsComposeChar_arabic(c))) {
 357                 paintChars(vpos, hebrew, arabic);
 358         } else if (hebrew) {
 359                 paintHebrewComposeChar(vpos);
 360         } else if (arabic) {
 361                 paintArabicComposeChar(vpos);
 362         }
 363
 364         paintForeignMark(orig_x, orig_font);
 365
 366         return;
 367 }
 368
 369
 370 void RowPainter::paintBackground()
 371 {
 372         int const x = int(xo_);
 373         int const y = yo_ < 0 ? 0 : yo_;
 374         int const h = yo_ < 0 ? row_.height() + yo_ : row_.height();
 375         pain_.fillRectangle(x, y, width_, h, text_.backgroundColor());
 376 }
 377
 378
 379 void RowPainter::paintSelection()
 380 {
 381         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params());
 382
 383         // the current selection
 384         int const startx = text_.selection.start.x();
 385         int const endx = text_.selection.end.x();
 386         int const starty = text_.selection.start.y();
 387         int const endy = text_.selection.end.y();
 388         ParagraphList::iterator startpit = text_.getPar(text_.selection.start);
 389         ParagraphList::iterator endpit = text_.getPar(text_.selection.end);
 390         RowList::iterator startrow = startpit->getRow(text_.selection.start.pos());
 391         RowList::iterator endrow = endpit->getRow(text_.selection.end.pos());
 392         int const h = row_.height();
 393
 394         if (text_.bidi.same_direction()) {
 395                 int x;
 396                 int y = yo_;
 397                 int w;
 398
 399                 if (startrow == rit_ && endrow == rit_) {
 400                         if (startx < endx) {
 401                                 x = int(xo_) + startx;
 402                                 w = endx - startx;
 403                         } else {
 404                                 x = int(xo_) + endx;
 405                                 w = startx - endx;
 406                         }
 407                         pain_.fillRectangle(x, y, w, h, LColor::selection);
 408                 } else if (startrow == rit_) {
 409                         int const x = is_rtl ? int(xo_) : int(xo_ + startx);
 410                         int const w = is_rtl ? startx : (width_ - startx);
 411                         pain_.fillRectangle(x, y, w, h, LColor::selection);
 412                 } else if (endrow == rit_) {
 413                         int const x = is_rtl ? int(xo_ + endx) : int(xo_);
 414                         int const w = is_rtl ? (width_ - endx) : endx;
 415                         pain_.fillRectangle(x, y, w, h, LColor::selection);
 416                 } else if (y_ > starty && y_ < endy) {
 417                         pain_.fillRectangle(int(xo_), y, width_, h, LColor::selection);
 418                 }
 419                 return;
 420         }
 421
 422         if (startrow != rit_ && endrow != rit_) {
 423                 if (y_ > starty && y_ < endy) {
 424                         int w = width_;
 425                         pain_.fillRectangle(int(xo_), yo_, w, h, LColor::selection);
 426                 }
 427                 return;
 428         }
 429
 430         if ((startrow != rit_ && !is_rtl) || (endrow != rit_ && is_rtl))
 431                 pain_.fillRectangle(int(xo_), yo_,
 432                         int(x_), h, LColor::selection);
 433
 434         pos_type const body_pos = pit_->beginningOfBody();
 435         pos_type const end = row_.endpos();
 436         double tmpx = x_;
 437
 438         for (pos_type vpos = row_.pos(); vpos < end; ++vpos)  {
 439                 pos_type pos = text_.bidi.vis2log(vpos);
 440                 double const old_tmpx = tmpx;
 441                 if (body_pos > 0 && pos == body_pos - 1) {
 442                         LyXLayout_ptr const & layout = pit_->layout();
 443                         LyXFont const lfont = getLabelFont();
 444
 445                         tmpx += label_hfill_ + font_metrics::width(layout->labelsep, lfont);
 446
 447                         if (pit_->isLineSeparator(body_pos - 1))
 448                                 tmpx -= singleWidth(body_pos - 1);
 449                 }
 450
 451                 if (hfillExpansion(*pit_, row_, pos)) {
 452                         tmpx += singleWidth(pos);
 453                         if (pos >= body_pos)
 454                                 tmpx += hfill_;
 455                         else
 456                                 tmpx += label_hfill_;
 457                 }
 458
 459                 else if (pit_->isSeparator(pos)) {
 460                         tmpx += singleWidth(pos);
 461                         if (pos >= body_pos)
 462                                 tmpx += separator_;
 463                 } else {
 464                         tmpx += singleWidth(pos);
 465                 }
 466
 467                 if ((startrow != rit_ || text_.selection.start.pos() <= pos) &&
 468                         (endrow != rit_ || pos < text_.selection.end.pos())) {
 469                         // Here we do not use x_ as xo_ was added to x_.
 470                         pain_.fillRectangle(int(old_tmpx), yo_,
 471                                 int(tmpx - old_tmpx + 1), h, LColor::selection);
 472                 }
 473         }
 474
 475         if ((startrow != rit_ && is_rtl) || (endrow != rit_ && !is_rtl)) {
 476                 pain_.fillRectangle(int(xo_ + tmpx),
 477                         yo_, int(bv_.workWidth() - tmpx), h, LColor::selection);
 478         }
 479 }
 480
 481
 482 void RowPainter::paintChangeBar()
 483 {
 484         pos_type const start = row_.pos();
 485         pos_type const end = row_.endpos();
 486
 487         if (start == end || !pit_->isChanged(start, end - 1))
 488                 return;
 489
 490         int const height = text_.isLastRow(pit_, row_)
 491                 ? row_.baseline()
 492                 : row_.height() + boost::next(rit_)->top_of_text();
 493
 494         pain_.fillRectangle(4, yo_, 5, height, LColor::changebar);
 495 }
 496
 497
 498 void RowPainter::paintAppendix()
 499 {
 500         if (!pit_->params().appendix())
 501                 return;
 502
 503         // FIXME: can be just width_ ?
 504         int const ww = bv_.workWidth();
 505
 506         int y = yo_;
 507
 508         if (pit_->params().startOfAppendix())
 509                 y += 2 * defaultRowHeight();
 510
 511         pain_.line(1, y, 1, yo_ + row_.height(), LColor::appendix);
 512         pain_.line(ww - 2, y, ww - 2, yo_ + row_.height(), LColor::appendix);
 513 }
 514
 515
 516 void RowPainter::paintDepthBar()
 517 {
 518         Paragraph::depth_type const depth = pit_->getDepth();
 519
 520         if (depth <= 0)
 521                 return;
 522
 523         Paragraph::depth_type prev_depth = 0;
 524         if (!text_.isFirstRow(pit_, row_)) {
 525                 ParagraphList::iterator pit2 = pit_;
 526                 if (row_.pos() == 0)
 527                         --pit2;
 528                 prev_depth = pit2->getDepth();
 529         }
 530
 531         Paragraph::depth_type next_depth = 0;
 532         if (!text_.isLastRow(pit_, row_)) {
 533                 ParagraphList::iterator pit2 = pit_;
 534                 if (row_.endpos() >= pit2->size())
 535                         ++pit2;
 536                 next_depth = pit2->getDepth();
 537         }
 538
 539         for (Paragraph::depth_type i = 1; i <= depth; ++i) {
 540                 int const w = PAPER_MARGIN / 5;
 541                 int x = int(w * i + xo_);
 542                 // only consider the changebar space if we're drawing outer left
 543                 if (xo_ == 0)
 544                         x += CHANGEBAR_MARGIN;
 545                 int const h = yo_ + row_.height() - 1 - (i - next_depth - 1) * 3;
 546
 547                 pain_.line(x, yo_, x, h, LColor::depthbar);
 548
 549                 if (i > prev_depth)
 550                         pain_.fillRectangle(x, yo_, w, 2, LColor::depthbar);
 551                 if (i > next_depth)
 552                         pain_.fillRectangle(x, h, w, 2, LColor::depthbar);
 553         }
 554 }
 555
 556
 557 int RowPainter::paintLengthMarker(string const & prefix, VSpace const & vsp,
 558         int start)
 559 {
 560         if (vsp.kind() == VSpace::NONE)
 561                 return 0;
 562
 563         int const arrow_size = 4;
 564         int const size = getLengthMarkerHeight(bv_, vsp);
 565         int const end = start + size;
 566
 567         // the label to display (if any)
 568         string str;
 569         // y-values for top arrow
 570         int ty1, ty2;
 571         // y-values for bottom arrow
 572         int by1, by2;
 573
 574         str = prefix + " (" + vsp.asLyXCommand() + ")";
 575
 576         if (vsp.kind() == VSpace::VFILL) {
 577                 ty1 = ty2 = start;
 578                 by1 = by2 = end;
 579         } else {
 580                 // adding or removing space
 581                 bool const added = vsp.kind() != VSpace::LENGTH ||
 582                                    vsp.length().len().value() > 0.0;
 583                 ty1 = added ? (start + arrow_size) : start;
 584                 ty2 = added ? start : (start + arrow_size);
 585                 by1 = added ? (end - arrow_size) : end;
 586                 by2 = added ? end : (end - arrow_size);
 587         }
 588
 589         int const leftx = int(xo_) + leftMargin();
 590         int const midx = leftx + arrow_size;
 591         int const rightx = midx + arrow_size;
 592
 593         // first the string
 594         int w = 0;
 595         int a = 0;
 596         int d = 0;
 597
 598         LyXFont font;
 599         font.setColor(LColor::added_space);
 600         font.decSize();
 601         font.decSize();
 602         font_metrics::rectText(str, font, w, a, d);
 603
 604         pain_.rectText(leftx + 2 * arrow_size + 5,
 605                        start + ((end - start) / 2) + d,
 606                        str, font,
 607                        LColor::none, LColor::none);
 608
 609         // top arrow
 610         pain_.line(leftx, ty1, midx, ty2, LColor::added_space);
 611         pain_.line(midx, ty2, rightx, ty1, LColor::added_space);
 612
 613         // bottom arrow
 614         pain_.line(leftx, by1, midx, by2, LColor::added_space);
 615         pain_.line(midx, by2, rightx, by1, LColor::added_space);
 616
 617         // joining line
 618         pain_.line(midx, ty2, midx, by2, LColor::added_space);
 619
 620         return size;
 621 }
 622
 623
 624 int RowPainter::paintAppendixStart(int y)
 625 {
 626         LyXFont pb_font;
 627         pb_font.setColor(LColor::appendix);
 628         pb_font.decSize();
 629
 630         string const label = _("Appendix");
 631         int w = 0;
 632         int a = 0;
 633         int d = 0;
 634         font_metrics::rectText(label, pb_font, w, a, d);
 635
 636         int const text_start = int(xo_ + (width_ - w) / 2);
 637         int const text_end = text_start + w;
 638
 639         pain_.rectText(text_start, y + d, label, pb_font, LColor::none, LColor::none);
 640
 641         pain_.line(int(xo_ + 1), y, text_start, y, LColor::appendix);
 642         pain_.line(text_end, y, int(xo_ + width_ - 2), y, LColor::appendix);
 643
 644         return 3 * defaultRowHeight();
 645 }
 646
 647
 648 void RowPainter::paintFirst()
 649 {
 650         ParagraphParameters const & parparams = pit_->params();
 651
 652         int y_top = 0;
 653
 654         // start of appendix?
 655         if (parparams.startOfAppendix())
 656                 y_top += paintAppendixStart(yo_ + y_top + 2 * defaultRowHeight());
 657
 658         // the top margin
 659         if (text_.isFirstRow(pit_, row_) && !text_.isInInset())
 660                 y_top += PAPER_MARGIN;
 661
 662         // draw the additional space if needed:
 663         y_top += paintLengthMarker(_("Space above"), parparams.spaceTop(),
 664                         yo_ + y_top);
 665
 666         Buffer const & buffer = *bv_.buffer();
 667
 668         LyXLayout_ptr const & layout = pit_->layout();
 669
 670         if (buffer.params().paragraph_separation == BufferParams::PARSEP_SKIP) {
 671                 if (pit_ != text_.ownerParagraphs().begin()) {
 672                         if (layout->latextype == LATEX_PARAGRAPH
 673                                 && !pit_->getDepth()) {
 674                                 y_top += buffer.params().getDefSkip().inPixels(bv_);
 675                         } else {
 676                                 LyXLayout_ptr const & playout =
 677                                         boost::prior(pit_)->layout();
 678                                 if (playout->latextype == LATEX_PARAGRAPH
 679                                         && !boost::prior(pit_)->getDepth()) {
 680                                         // is it right to use defskip here, too? (AS)
 681                                         y_top += buffer.params().getDefSkip().inPixels(bv_);
 682                                 }
 683                         }
 684                 }
 685         }
 686
 687         int const ww = bv_.workWidth();
 688
 689         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params());
 690         bool const is_seq = isFirstInSequence(pit_, text_.ownerParagraphs());
 691         //lyxerr << "paintFirst: " << pit_->id() << " is_seq: " << is_seq << std::endl;
 692
 693         // should we print a label?
 694         if (layout->labeltype >= LABEL_STATIC
 695             && (layout->labeltype != LABEL_STATIC
 696                       || layout->latextype != LATEX_ENVIRONMENT
 697                       || is_seq)) {
 698
 699                 LyXFont font = getLabelFont();
 700                 if (!pit_->getLabelstring().empty()) {
 701                         double x = x_;
 702                         string const str = pit_->getLabelstring();
 703
 704                         // this is special code for the chapter layout. This is
 705                         // printed in an extra row and has a pagebreak at
 706                         // the top.
 707                         if (layout->counter == "chapter") {
 708                                 if (buffer.params().secnumdepth >= 0) {
 709                                         float spacing_val = 1.0;
 710                                         if (!parparams.spacing().isDefault()) {
 711                                                 spacing_val = parparams.spacing().getValue();
 712                                         } else {
 713                                                 spacing_val = buffer.params().spacing().getValue();
 714                                         }
 715
 716                                         int const maxdesc =
 717                                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val)
 718                                                 + int(layout->parsep) * defaultRowHeight();
 719
 720                                         if (is_rtl) {
 721                                                 x = ww - leftMargin() -
 722                                                         font_metrics::width(str, font);
 723                                         }
 724
 725                                         pain_.text(int(x),
 726                                                 yo_ + row_.baseline() -
 727                                                 row_.ascent_of_text() - maxdesc,
 728                                                 str, font);
 729                                 }
 730                         } else {
 731                                 if (is_rtl) {
 732                                         x = ww - leftMargin()
 733                                                 + font_metrics::width(layout->labelsep, font);
 734                                 } else {
 735                                         x = x_ - font_metrics::width(layout->labelsep, font)
 736                                                 - font_metrics::width(str, font);
 737                                 }
 738
 739                                 pain_.text(int(x), yo_ + row_.baseline(), str, font);
 740                         }
 741                 }
 742
 743         // the labels at the top of an environment.
 744         // More or less for bibliography
 745         } else if (is_seq &&
 746                 (layout->labeltype == LABEL_TOP_ENVIRONMENT ||
 747                 layout->labeltype == LABEL_BIBLIO ||
 748                 layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 749                 LyXFont font = getLabelFont();
 750                 if (!pit_->getLabelstring().empty()) {
 751                         string const str = pit_->getLabelstring();
 752                         float spacing_val = 1.0;
 753                         if (!parparams.spacing().isDefault()) {
 754                                 spacing_val = parparams.spacing().getValue();
 755                         } else {
 756                                 spacing_val = buffer.params().spacing().getValue();
 757                         }
 758
 759                         int maxdesc =
 760                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val
 761                                 + (layout->labelbottomsep * defaultRowHeight()));
 762
 763                         double x = x_;
 764                         if (layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 765                                 x = ((is_rtl ? leftMargin() : x_)
 766                                          + ww - text_.rightMargin(*pit_, *bv_.buffer(), row_)) / 2;
 767                                 x -= font_metrics::width(str, font) / 2;
 768                         } else if (is_rtl) {
 769                                 x = ww - leftMargin() -
 770                                         font_metrics::width(str, font);
 771                         }
 772                         pain_.text(int(x),
 773                             yo_ + row_.baseline() - row_.ascent_of_text() - maxdesc,
 774                                   str, font);
 775                 }
 776         }
 777 }
 778
 779
 780 void RowPainter::paintLast()
 781 {
 782         ParagraphParameters const & parparams = pit_->params();
 783         int y_bottom = row_.height() - 1;
 784
 785         // the bottom margin
 786         if (text_.isLastRow(pit_, row_) && !text_.isInInset())
 787                 y_bottom -= PAPER_MARGIN;
 788
 789         int const ww = bv_.workWidth();
 790
 791         // draw the additional space if needed:
 792         int const height = getLengthMarkerHeight(bv_, parparams.spaceBottom());
 793         y_bottom -= paintLengthMarker(_("Space below"), parparams.spaceBottom(),
 794                              yo_ + y_bottom - height);
 795
 796         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params());
 797         int const endlabel = getEndLabel(pit_, text_.ownerParagraphs());
 798
 799         // draw an endlabel
 800         switch (endlabel) {
 801         case END_LABEL_BOX:
 802         case END_LABEL_FILLED_BOX:
 803         {
 804                 LyXFont const font = getLabelFont();
 805                 int const size = int(0.75 * font_metrics::maxAscent(font));
 806                 int const y = (yo_ + row_.baseline()) - size;
 807                 int x = is_rtl ? LEFT_MARGIN : ww - PAPER_MARGIN - size;
 808
 809                 if (row_.fill() <= size)
 810                         x += (size - row_.fill() + 1) * (is_rtl ? -1 : 1);
 811
 812                 if (endlabel == END_LABEL_BOX)
 813                         pain_.rectangle(x, y, size, size, LColor::eolmarker);
 814                 else
 815                         pain_.fillRectangle(x, y, size, size, LColor::eolmarker);
 816                 break;
 817         }
 818         case END_LABEL_STATIC:
 819         {
 820                 LyXFont font = getLabelFont();
 821                 string const & str = pit_->layout()->endlabelstring();
 822                 double const x = is_rtl ?
 823                         x_ - font_metrics::width(str, font)
 824                         : ww - text_.rightMargin(*pit_, *bv_.buffer(), row_) - row_.fill();
 825                 pain_.text(int(x), yo_ + row_.baseline(), str, font);
 826                 break;
 827         }
 828         case END_LABEL_NO_LABEL:
 829                 break;
 830         }
 831 }
 832
 833
 834 void RowPainter::paintText()
 835 {
 836         pos_type const end = row_.endpos();
 837         pos_type body_pos = pit_->beginningOfBody();
 838         if (body_pos > 0 &&
 839                 (body_pos > end || !pit_->isLineSeparator(body_pos - 1))) {
 840                 body_pos = 0;
 841         }
 842
 843         LyXLayout_ptr const & layout = pit_->layout();
 844
 845         bool running_strikeout = false;
 846         bool is_struckout = false;
 847         int last_strikeout_x = 0;
 848
 849         for (pos_type vpos = row_.pos(); vpos <= end; ) {
 850                 if (x_ > bv_.workWidth())
 851                         break;
 852
 853                 pos_type pos = text_.bidi.vis2log(vpos);
 854
 855                 if (pos >= pit_->size()) {
 856                         ++vpos;
 857                         continue;
 858                 }
 859
 860                 if (x_ + singleWidth(pos) < 0) {
 861                         x_ += singleWidth(pos);
 862                         ++vpos;
 863                         continue;
 864                 }
 865
 866                 is_struckout = isDeletedText(*pit_, pos);
 867
 868                 if (is_struckout && !running_strikeout) {
 869                         running_strikeout = true;
 870                         last_strikeout_x = int(x_);
 871                 }
 872
 873                 bool const highly_editable_inset = pit_->isInset(pos)
 874                         && isHighlyEditableInset(pit_->getInset(pos));
 875
 876                 // if we reach the end of a struck out range, paint it
 877                 // we also don't paint across things like tables
 878                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 879                         int const middle = yo_ + (row_.baseline() + row_.top_of_text()) / 2;
 880                         pain_.line(last_strikeout_x, middle, int(x_), middle,
 881                                 LColor::strikeout, Painter::line_solid, Painter::line_thin);
 882                         running_strikeout = false;
 883                 }
 884
 885                 if (body_pos > 0 && pos == body_pos - 1) {
 886                         int const lwidth = font_metrics::width(layout->labelsep,
 887                                 getLabelFont());
 888
 889                         x_ += label_hfill_ + lwidth - singleWidth(body_pos - 1);
 890                 }
 891
 892                 if (pit_->isHfill(pos)) {
 893                         x_ += 1;
 894
 895                         int const y0 = yo_ + row_.baseline();
 896                         int const y1 = y0 - defaultRowHeight() / 2;
 897
 898                         pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 899
 900                         if (hfillExpansion(*pit_, row_, pos)) {
 901                                 int const y2 = (y0 + y1) / 2;
 902
 903                                 if (pos >= body_pos) {
 904                                         pain_.line(int(x_), y2, int(x_ + hfill_), y2,
 905                                                   LColor::added_space,
 906                                                   Painter::line_onoffdash);
 907                                         x_ += hfill_;
 908                                 } else {
 909                                         pain_.line(int(x_), y2, int(x_ + label_hfill_), y2,
 910                                                   LColor::added_space,
 911                                                   Painter::line_onoffdash);
 912                                         x_ += label_hfill_;
 913                                 }
 914                                 pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 915                         }
 916                         x_ += 2;
 917                         ++vpos;
 918                 } else if (pit_->isSeparator(pos)) {
 919                         x_ += singleWidth(pos);
 920                         if (pos >= body_pos)
 921                                 x_ += separator_;
 922                         ++vpos;
 923                 } else {
 924                         paintFromPos(vpos);
 925                 }
 926         }
 927
 928         // if we reach the end of a struck out range, paint it
 929         if (running_strikeout) {
 930                 int const middle = yo_ + (row_.baseline() + row_.top_of_text()) / 2;
 931                 pain_.line(last_strikeout_x, middle, int(x_), middle,
 932                         LColor::strikeout, Painter::line_solid, Painter::line_thin);
 933                 running_strikeout = false;
 934         }
 935 }
 936
 937
 938 void RowPainter::paint()
 939 {
 940         // FIXME: what is this fixing ?
 941         if (text_.isInInset() && x_ < 0)
 942                 x_ = 0;
 943         x_ += xo_;
 944
 945         // background has already been cleared.
 946         if (&text_ == bv_.text)
 947                 paintBackground();
 948
 949         // paint the selection background
 950         if (text_.selection.set())
 951                 paintSelection();
 952
 953         // vertical lines for appendix
 954         paintAppendix();
 955
 956         // environment depth brackets
 957         paintDepthBar();
 958
 959         // changebar
 960         paintChangeBar();
 961
 962         if (row_.pos() == 0)
 963                 paintFirst();
 964
 965         if (row_.endpos() >= pit_->size())
 966                 paintLast();
 967
 968         // paint text
 969         paintText();
 970 }
 971
 972
 973 int paintRows(BufferView const & bv, LyXText const & text,
 974         ParagraphList::iterator pit, RowList::iterator rit,
 975         int xo, int y, int yf, int yo)
 976 {
 977         //lyxerr << "  paintRows: rit: " << &*rit << endl;
 978         int const yy = yf - y;
 979         int const y2 = bv.painter().paperHeight();
 980
 981         ParagraphList::iterator end = text.ownerParagraphs().end();
 982         bool active = false;
 983
 984         for ( ; pit != end; ++pit) {
 985                 RowList::iterator row = pit->rows.begin();
 986                 RowList::iterator rend = pit->rows.end();
 987
 988                 for ( ; row != rend; ++row) {
 989                         if (row == rit)
 990                                 active = true;
 991                         if (active) {
 992                                 RowPainter painter(bv, text, pit, row, y + yo, xo, y + bv.top_y());
 993                                 painter.paint();
 994                                 y += row->height();
 995                                 if (yy + y >= y2)
 996                                         return y;
 997                         } else {
 998                                 //lyxerr << "   paintRows: row: " << &*row << " ignored" << endl;
 999                         }
1000                 }
1001         }
1002
1003         return y;
1004 }
1005
1006 } // namespace anon
1007
1008
1009 int paintText(BufferView & bv)
1010 {
1011         int const topy = bv.top_y();
1012         ParagraphList::iterator pit;
1013         RowList::iterator rit = bv.text->getRowNearY(topy, pit);
1014         int const y = pit->y + rit->y_offset() - topy;
1015         return paintRows(bv, *bv.text, pit, rit, 0, y, y, 0);
1016 }
1017
1018
1019 void paintTextInset(BufferView & bv, LyXText & text, int x, int baseline)
1020 {
1021         RowList::iterator rit = text.firstRow();
1022         RowList::iterator end = text.endRow();
1023         ParagraphList::iterator pit = text.ownerParagraphs().begin();
1024
1025         int y_offset = baseline - rit->ascent_of_text();
1026         int y = y_offset;
1027         while (rit != end && y + rit->height() <= 0) {
1028                 y += rit->height();
1029                 text.nextRow(pit, rit);
1030         }
1031         if (y_offset < 0)
1032                 paintRows(bv, text, pit, rit, x, 0, y, y);
1033         else
1034                 paintRows(bv, text, pit, rit, x, 0, y_offset, y_offset);
1035 }
1036
1037
1038 int getLengthMarkerHeight(BufferView const & bv, VSpace const & vsp)
1039 {
1040         if (vsp.kind() == VSpace::NONE)
1041                 return 0;
1042
1043         int const arrow_size = 4;
1044         int const space_size = vsp.inPixels(bv);
1045
1046         LyXFont font;
1047         font.decSize();
1048         int const min_size = max(3 * arrow_size,
1049                 font_metrics::maxAscent(font)
1050                 + font_metrics::maxDescent(font));
1051
1052         if (vsp.length().len().value() < 0.0)
1053                 return min_size;
1054         else
1055                 return max(min_size, space_size);
1056 }