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