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