src/rowpainter.cpp

   1 /**
   2  * \file rowpainter.cpp
   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 "Bidi.h"
  17 #include "Buffer.h"
  18 #include "CoordCache.h"
  19 #include "Cursor.h"
  20 #include "debug.h"
  21 #include "BufferParams.h"
  22 #include "BufferView.h"
  23 #include "Encoding.h"
  24 #include "gettext.h"
  25 #include "Language.h"
  26 #include "Color.h"
  27 #include "LyXRC.h"
  28 #include "Row.h"
  29 #include "MetricsInfo.h"
  30 #include "Paragraph.h"
  31 #include "ParagraphMetrics.h"
  32 #include "paragraph_funcs.h"
  33 #include "ParagraphParameters.h"
  34 #include "TextMetrics.h"
  35 #include "VSpace.h"
  36
  37 #include "frontends/FontMetrics.h"
  38 #include "frontends/Painter.h"
  39
  40 #include "insets/InsetText.h"
  41
  42 #include "support/textutils.h"
  43
  44 #include <boost/crc.hpp>
  45
  46 using std::endl;
  47 using std::max;
  48 using std::string;
  49
  50
  51 namespace lyx {
  52
  53 using frontend::Painter;
  54 using frontend::FontMetrics;
  55
  56 RowPainter::RowPainter(PainterInfo & pi,
  57         Text const & text, pit_type pit, Row const & row, Bidi & bidi, int x, int y)
  58         : pi_(pi), text_(text),
  59           text_metrics_(pi_.base.bv->textMetrics(&text)),
  60           pars_(text.paragraphs()),
  61           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  62           pm_(text_metrics_.parMetrics(pit)),
  63           bidi_(bidi), erased_(pi_.erased_),
  64           xo_(x), yo_(y), width_(text_metrics_.width())
  65 {
  66         bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
  67         x_ = row_.x + xo_;
  68
  69         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  70         //row_.dump();
  71
  72         BOOST_ASSERT(pit >= 0);
  73         BOOST_ASSERT(pit < int(text.paragraphs().size()));
  74 }
  75
  76
  77 Font const RowPainter::getLabelFont() const
  78 {
  79         return text_.getLabelFont(pi_.base.bv->buffer(), par_);
  80 }
  81
  82
  83 int RowPainter::leftMargin() const
  84 {
  85         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
  86                 row_.pos());
  87 }
  88
  89
  90 void RowPainter::paintHfill(pos_type const pos, pos_type const body_pos)
  91 {
  92         x_ += 1;
  93
  94         int const y0 = yo_;
  95         int const y1 = y0 - defaultRowHeight() / 2;
  96
  97         pi_.pain.line(int(x_), y1, int(x_), y0, Color::added_space);
  98
  99         if (pm_.hfillExpansion(row_, pos)) {
 100                 int const y2 = (y0 + y1) / 2;
 101
 102                 if (pos >= body_pos) {
 103                         pi_.pain.line(int(x_), y2, int(x_ + row_.hfill), y2,
 104                                 Color::added_space,
 105                                 Painter::line_onoffdash);
 106                         x_ += row_.hfill;
 107                 } else {
 108                         pi_.pain.line(int(x_), y2, int(x_ + row_.label_hfill), y2,
 109                                 Color::added_space,
 110                                 Painter::line_onoffdash);
 111                         x_ += row_.label_hfill;
 112                 }
 113                 pi_.pain.line(int(x_), y1, int(x_), y0, Color::added_space);
 114         }
 115         x_ += 2;
 116 }
 117
 118
 119 // If you want to debug inset metrics uncomment the following line:
 120 //#define DEBUG_METRICS
 121 // This draws green lines around each inset.
 122
 123
 124 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
 125 {
 126         Font font = text_metrics_.getDisplayFont(pit_, pos);
 127
 128         BOOST_ASSERT(inset);
 129         // FIXME: We should always use font, see documentation of
 130         // noFontChange() in Inset.h.
 131         pi_.base.font = inset->noFontChange() ?
 132                 pi_.base.bv->buffer().params().getFont() :
 133                 font;
 134         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 135         pi_.erased_ = erased_ || par_.isDeleted(pos);
 136         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 137         // insets are painted completely. Recursive
 138         inset->drawSelection(pi_, int(x_), yo_);
 139         inset->draw(pi_, int(x_), yo_);
 140
 141         Dimension const & dim = pm_.insetDimension(inset);
 142
 143         paintForeignMark(x_, font, dim.descent());
 144
 145         x_ += dim.width();
 146
 147 #ifdef DEBUG_METRICS
 148         int const x1 = int(x_ - dim.width());
 149         Dimension dim2;
 150         BOOST_ASSERT(max_witdh_ > 0);
 151         int right_margin = text_metrics_.rightMargin(pm_);
 152         int const w = max_witdh_ - leftMargin() - right_margin;
 153         MetricsInfo mi(pi_.base.bv, font, w);
 154         inset->metrics(mi, dim2);
 155         if (dim.wid != dim2.wid)
 156                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 157                        << " draw width " << dim.width()
 158                        << "> metrics width " << dim2.wid << "." << std::endl;
 159         if (dim->asc != dim2.asc)
 160                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 161                        << " draw ascent " << dim.ascent()
 162                        << "> metrics ascent " << dim2.asc << "." << std::endl;
 163         if (dim2.descent() != dim.des)
 164                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 165                        << " draw ascent " << dim.descent()
 166                        << "> metrics descent " << dim2.des << "." << std::endl;
 167         BOOST_ASSERT(dim2.wid == dim.wid);
 168         BOOST_ASSERT(dim2.asc == dim.asc);
 169         BOOST_ASSERT(dim2.des == dim.des);
 170         int const x2 = x1 + dim.wid;
 171         int const y1 = yo_ + dim.des;
 172         int const y2 = yo_ - dim.asc;
 173         pi_.pain.line(x1, y1, x1, y2, Color::green);
 174         pi_.pain.line(x1, y1, x2, y1, Color::green);
 175         pi_.pain.line(x2, y1, x2, y2, Color::green);
 176         pi_.pain.line(x1, y2, x2, y2, Color::green);
 177 #endif
 178 }
 179
 180
 181 void RowPainter::paintHebrewComposeChar(pos_type & vpos, Font const & font)
 182 {
 183         pos_type pos = bidi_.vis2log(vpos);
 184
 185         docstring str;
 186
 187         // first char
 188         char_type c = par_.getChar(pos);
 189         str += c;
 190         ++vpos;
 191
 192         int const width = theFontMetrics(font).width(c);
 193         int dx = 0;
 194
 195         for (pos_type i = pos - 1; i >= 0; --i) {
 196                 c = par_.getChar(i);
 197                 if (!Encodings::isComposeChar_hebrew(c)) {
 198                         if (isPrintableNonspace(c)) {
 199                                 int const width2 = pm_.singleWidth(i,
 200                                         text_metrics_.getDisplayFont(pit_, i));
 201                                 dx = (c == 0x05e8 || // resh
 202                                       c == 0x05d3)   // dalet
 203                                         ? width2 - width
 204                                         : (width2 - width) / 2;
 205                         }
 206                         break;
 207                 }
 208         }
 209
 210         // Draw nikud
 211         pi_.pain.text(int(x_) + dx, yo_, str, font);
 212 }
 213
 214
 215 void RowPainter::paintArabicComposeChar(pos_type & vpos, Font const & font)
 216 {
 217         pos_type pos = bidi_.vis2log(vpos);
 218         docstring str;
 219
 220         // first char
 221         char_type c = par_.getChar(pos);
 222         c = par_.transformChar(c, pos);
 223         str += c;
 224         ++vpos;
 225
 226         int const width = theFontMetrics(font).width(c);
 227         int dx = 0;
 228
 229         for (pos_type i = pos - 1; i >= 0; --i) {
 230                 c = par_.getChar(i);
 231                 if (!Encodings::isComposeChar_arabic(c)) {
 232                         if (isPrintableNonspace(c)) {
 233                                 int const width2 = pm_.singleWidth(i,
 234                                                 text_metrics_.getDisplayFont(pit_, i));
 235                                 dx = (width2 - width) / 2;
 236                         }
 237                         break;
 238                 }
 239         }
 240         // Draw nikud
 241         pi_.pain.text(int(x_) + dx, yo_, str, font);
 242 }
 243
 244
 245 void RowPainter::paintChars(pos_type & vpos, Font const & font,
 246                             bool hebrew, bool arabic)
 247 {
 248         // This method takes up 70% of time when typing
 249         pos_type pos = bidi_.vis2log(vpos);
 250         pos_type const end = row_.endpos();
 251         FontSpan const font_span = par_.fontSpan(pos);
 252         Change::Type const prev_change = par_.lookupChange(pos).type;
 253
 254         // first character
 255         std::vector<char_type> str;
 256         str.reserve(100);
 257         str.push_back(par_.getChar(pos));
 258
 259         if (arabic) {
 260                 char_type c = str[0];
 261                 if (c == '(')
 262                         c = ')';
 263                 else if (c == ')')
 264                         c = '(';
 265                 str[0] = par_.transformChar(c, pos);
 266         }
 267
 268         // collect as much similar chars as we can
 269         for (++vpos ; vpos < end ; ++vpos) {
 270                 pos = bidi_.vis2log(vpos);
 271                 if (pos < font_span.first || pos > font_span.last)
 272                         break;
 273
 274                 if (prev_change != par_.lookupChange(pos).type)
 275                         break;
 276
 277                 char_type c = par_.getChar(pos);
 278
 279                 if (!isPrintableNonspace(c))
 280                         break;
 281
 282                 /* Because we do our own bidi, at this point the strings are
 283                  * already in visual order. However, Qt also applies its own
 284                  * bidi algorithm to strings that it paints to the screen.
 285                  * Therefore, if we were to paint Hebrew/Arabic words as a
 286                  * single string, the letters in the words would get reversed
 287                  * again. In order to avoid that, we don't collect Hebrew/
 288                  * Arabic characters, but rather paint them one at a time.
 289                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 290                  */
 291                 if (hebrew)
 292                         break;
 293
 294                 /* FIXME: these checks are irrelevant, since 'arabic' and
 295                  * 'hebrew' alone are already going to trigger a break.
 296                  * However, this should not be removed completely, because
 297                  * if an alternative solution is found which allows grouping
 298                  * of arabic and hebrew characters, then these breaks may have
 299                  * to be re-applied.
 300
 301                 if (arabic && Encodings::isComposeChar_arabic(c))
 302                         break;
 303
 304                 if (hebrew && Encodings::isComposeChar_hebrew(c))
 305                         break;
 306                 */
 307
 308                 if (arabic) {
 309                         if (c == '(')
 310                                 c = ')';
 311                         else if (c == ')')
 312                                 c = '(';
 313                         c = par_.transformChar(c, pos);
 314                         /* see comment in hebrew, explaining why we break */
 315                         break;
 316                 }
 317
 318                 str.push_back(c);
 319         }
 320
 321         docstring s(&str[0], str.size());
 322
 323         if (prev_change != Change::UNCHANGED) {
 324                 Font copy(font);
 325                 if (prev_change == Change::DELETED) {
 326                         copy.setColor(Color::deletedtext);
 327                 } else if (prev_change == Change::INSERTED) {
 328                         copy.setColor(Color::addedtext);
 329                 }
 330                 x_ += pi_.pain.text(int(x_), yo_, s, copy);
 331         } else {
 332                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 333         }
 334 }
 335
 336
 337 void RowPainter::paintForeignMark(double orig_x, Font const & font, int desc)
 338 {
 339         if (!lyxrc.mark_foreign_language)
 340                 return;
 341         if (font.language() == latex_language)
 342                 return;
 343         if (font.language() == pi_.base.bv->buffer().params().language)
 344                 return;
 345
 346         int const y = yo_ + 1 + desc;
 347         pi_.pain.line(int(orig_x), y, int(x_), y, Color::language);
 348 }
 349
 350
 351 void RowPainter::paintFromPos(pos_type & vpos)
 352 {
 353         pos_type const pos = bidi_.vis2log(vpos);
 354         Font orig_font = text_metrics_.getDisplayFont(pit_, pos);
 355         double const orig_x = x_;
 356
 357         // usual characters, no insets
 358         char_type const c = par_.getChar(pos);
 359
 360         // special case languages
 361         std::string const & lang = orig_font.language()->lang();
 362         bool const hebrew = lang == "hebrew";
 363         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 364                                                 lang == "farsi";
 365
 366         // draw as many chars as we can
 367         if ((!hebrew && !arabic)
 368                 || (hebrew && !Encodings::isComposeChar_hebrew(c))
 369                 || (arabic && !Encodings::isComposeChar_arabic(c))) {
 370                 paintChars(vpos, orig_font, hebrew, arabic);
 371         } else if (hebrew) {
 372                 paintHebrewComposeChar(vpos, orig_font);
 373         } else if (arabic) {
 374                 paintArabicComposeChar(vpos, orig_font);
 375         }
 376
 377         paintForeignMark(orig_x, orig_font);
 378 }
 379
 380
 381 void RowPainter::paintChangeBar()
 382 {
 383         pos_type const start = row_.pos();
 384         pos_type end = row_.endpos();
 385
 386         if (par_.size() == end) {
 387                 // this is the last row of the paragraph;
 388                 // thus, we must also consider the imaginary end-of-par character
 389                 end++;
 390         }
 391
 392         if (start == end || !par_.isChanged(start, end))
 393                 return;
 394
 395         int const height = text_metrics_.isLastRow(pit_, row_)
 396                 ? row_.ascent()
 397                 : row_.height();
 398
 399         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color::changebar);
 400 }
 401
 402
 403 void RowPainter::paintAppendix()
 404 {
 405         // only draw the appendix frame once (for the main text)
 406         if (!par_.params().appendix() || !text_.isMainText(pi_.base.bv->buffer()))
 407                 return;
 408
 409         int y = yo_ - row_.ascent();
 410
 411         if (par_.params().startOfAppendix())
 412                 y += 2 * defaultRowHeight();
 413
 414         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color::appendix);
 415         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color::appendix);
 416 }
 417
 418
 419 void RowPainter::paintDepthBar()
 420 {
 421         depth_type const depth = par_.getDepth();
 422
 423         if (depth <= 0)
 424                 return;
 425
 426         depth_type prev_depth = 0;
 427         if (!text_metrics_.isFirstRow(pit_, row_)) {
 428                 pit_type pit2 = pit_;
 429                 if (row_.pos() == 0)
 430                         --pit2;
 431                 prev_depth = pars_[pit2].getDepth();
 432         }
 433
 434         depth_type next_depth = 0;
 435         if (!text_metrics_.isLastRow(pit_, row_)) {
 436                 pit_type pit2 = pit_;
 437                 if (row_.endpos() >= pars_[pit2].size())
 438                         ++pit2;
 439                 next_depth = pars_[pit2].getDepth();
 440         }
 441
 442         for (depth_type i = 1; i <= depth; ++i) {
 443                 int const w = nestMargin() / 5;
 444                 int x = int(xo_) + w * i;
 445                 // only consider the changebar space if we're drawing outermost text
 446                 if (text_.isMainText(pi_.base.bv->buffer()))
 447                         x += changebarMargin();
 448
 449                 int const starty = yo_ - row_.ascent();
 450                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 451
 452                 pi_.pain.line(x, starty, x, starty + h, Color::depthbar);
 453
 454                 if (i > prev_depth)
 455                         pi_.pain.fillRectangle(x, starty, w, 2, Color::depthbar);
 456                 if (i > next_depth)
 457                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color::depthbar);
 458         }
 459 }
 460
 461
 462 int RowPainter::paintAppendixStart(int y)
 463 {
 464         Font pb_font;
 465         pb_font.setColor(Color::appendix);
 466         pb_font.decSize();
 467
 468         int w = 0;
 469         int a = 0;
 470         int d = 0;
 471
 472         docstring const label = _("Appendix");
 473         theFontMetrics(pb_font).rectText(label, w, a, d);
 474
 475         int const text_start = int(xo_ + (width_ - w) / 2);
 476         int const text_end = text_start + w;
 477
 478         pi_.pain.rectText(text_start, y + d, label, pb_font, Color::none, Color::none);
 479
 480         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color::appendix);
 481         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color::appendix);
 482
 483         return 3 * defaultRowHeight();
 484 }
 485
 486
 487 void RowPainter::paintFirst()
 488 {
 489         ParagraphParameters const & parparams = par_.params();
 490
 491         int y_top = 0;
 492
 493         // start of appendix?
 494         if (parparams.startOfAppendix())
 495                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 496
 497         Buffer const & buffer = pi_.base.bv->buffer();
 498
 499         LayoutPtr const & layout = par_.layout();
 500
 501         if (buffer.params().paragraph_separation == BufferParams::PARSEP_SKIP) {
 502                 if (pit_ != 0) {
 503                         if (layout->latextype == LATEX_PARAGRAPH
 504                                 && !par_.getDepth()) {
 505                                 y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 506                         } else {
 507                                 LayoutPtr const & playout = pars_[pit_ - 1].layout();
 508                                 if (playout->latextype == LATEX_PARAGRAPH
 509                                         && !pars_[pit_ - 1].getDepth()) {
 510                                         // is it right to use defskip here, too? (AS)
 511                                         y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 512                                 }
 513                         }
 514                 }
 515         }
 516
 517         bool const is_rtl = text_.isRTL(buffer, par_);
 518         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 519         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << std::endl;
 520
 521         // should we print a label?
 522         if (layout->labeltype >= LABEL_STATIC
 523             && (layout->labeltype != LABEL_STATIC
 524                       || layout->latextype != LATEX_ENVIRONMENT
 525                       || is_seq)) {
 526
 527                 Font const font = getLabelFont();
 528                 FontMetrics const & fm = theFontMetrics(font);
 529
 530                 docstring const str = par_.getLabelstring();
 531                 if (!str.empty()) {
 532                         double x = x_;
 533
 534                         // this is special code for the chapter layout. This is
 535                         // printed in an extra row and has a pagebreak at
 536                         // the top.
 537                         if (layout->counter == "chapter") {
 538                                 double spacing_val = 1.0;
 539                                 if (!parparams.spacing().isDefault()) {
 540                                         spacing_val = parparams.spacing().getValue();
 541                                 } else {
 542                                         spacing_val = buffer.params().spacing().getValue();
 543                                 }
 544
 545                                 int const labeladdon = int(fm.maxHeight() * layout->spacing.getValue() * spacing_val);
 546
 547                                 int const maxdesc = int(fm.maxDescent() * layout->spacing.getValue() * spacing_val)
 548                                         + int(layout->parsep) * defaultRowHeight();
 549
 550                                 if (is_rtl) {
 551                                         x = width_ - leftMargin() -
 552                                                 fm.width(str);
 553                                 }
 554
 555                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 556                         } else {
 557                                 if (is_rtl) {
 558                                         x = width_ - leftMargin()
 559                                                 + fm.width(layout->labelsep);
 560                                 } else {
 561                                         x = x_ - fm.width(layout->labelsep)
 562                                                 - fm.width(str);
 563                                 }
 564
 565                                 pi_.pain.text(int(x), yo_, str, font);
 566                         }
 567                 }
 568
 569         // the labels at the top of an environment.
 570         // More or less for bibliography
 571         } else if (is_seq &&
 572                 (layout->labeltype == LABEL_TOP_ENVIRONMENT ||
 573                 layout->labeltype == LABEL_BIBLIO ||
 574                 layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 575                 Font font = getLabelFont();
 576                 if (!par_.getLabelstring().empty()) {
 577                         docstring const str = par_.getLabelstring();
 578                         double spacing_val = 1.0;
 579                         if (!parparams.spacing().isDefault())
 580                                 spacing_val = parparams.spacing().getValue();
 581                         else
 582                                 spacing_val = buffer.params().spacing().getValue();
 583
 584                         FontMetrics const & fm = theFontMetrics(font);
 585
 586                         int const labeladdon = int(fm.maxHeight()
 587                                 * layout->spacing.getValue() * spacing_val);
 588
 589                         int maxdesc =
 590                                 int(fm.maxDescent() * layout->spacing.getValue() * spacing_val
 591                                 + (layout->labelbottomsep * defaultRowHeight()));
 592
 593                         double x = x_;
 594                         if (layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 595                                 if (is_rtl)
 596                                         x = leftMargin();
 597                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 598                                 x -= fm.width(str) / 2;
 599                         } else if (is_rtl) {
 600                                 x = width_ - leftMargin() -     fm.width(str);
 601                         }
 602                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 603                 }
 604         }
 605 }
 606
 607
 608 void RowPainter::paintLast()
 609 {
 610         bool const is_rtl = text_.isRTL(pi_.base.bv->buffer(), par_);
 611         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 612
 613         // paint imaginary end-of-paragraph character
 614
 615         if (par_.isInserted(par_.size()) || par_.isDeleted(par_.size())) {
 616                 FontMetrics const & fm = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 617                 int const length = fm.maxAscent() / 2;
 618                 Color::color col = par_.isInserted(par_.size()) ? Color::addedtext : Color::deletedtext;
 619
 620                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 621                            Painter::line_solid, Painter::line_thick);
 622                 pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1, yo_ + 2, col,
 623                            Painter::line_solid, Painter::line_thick);
 624         }
 625
 626         // draw an endlabel
 627
 628         switch (endlabel) {
 629         case END_LABEL_BOX:
 630         case END_LABEL_FILLED_BOX: {
 631                 Font const font = getLabelFont();
 632                 FontMetrics const & fm = theFontMetrics(font);
 633                 int const size = int(0.75 * fm.maxAscent());
 634                 int const y = yo_ - size;
 635                 int x = is_rtl ? nestMargin() + changebarMargin() : width_ - size;
 636
 637                 if (width_ - int(row_.width()) <= size)
 638                         x += (size - width_ + row_.width() + 1) * (is_rtl ? -1 : 1);
 639
 640                 if (endlabel == END_LABEL_BOX)
 641                         pi_.pain.rectangle(x, y, size, size, Color::eolmarker);
 642                 else
 643                         pi_.pain.fillRectangle(x, y, size, size, Color::eolmarker);
 644                 break;
 645         }
 646
 647         case END_LABEL_STATIC: {
 648                 Font font = getLabelFont();
 649                 FontMetrics const & fm = theFontMetrics(font);
 650                 docstring const & str = par_.layout()->endlabelstring();
 651                 double const x = is_rtl ?
 652                         x_ - fm.width(str)
 653                         : - text_metrics_.rightMargin(pm_) - row_.width();
 654                 pi_.pain.text(int(x), yo_, str, font);
 655                 break;
 656         }
 657
 658         case END_LABEL_NO_LABEL:
 659                 break;
 660         }
 661 }
 662
 663
 664 void RowPainter::paintOnlyInsets()
 665 {
 666         pos_type const end = row_.endpos();
 667         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 668                 if (!par_.isInset(pos))
 669                         continue;
 670
 671                 // If outer row has changed, nested insets are repaint completely.
 672                 Inset const * inset = par_.getInset(pos);
 673
 674                 if (x_ > pi_.base.bv->workWidth())
 675                         continue;
 676
 677                 x_ = pi_.base.bv->coordCache().getInsets().x(inset);
 678                 paintInset(inset, pos);
 679         }
 680 }
 681
 682
 683 void RowPainter::paintText()
 684 {
 685         pos_type const end = row_.endpos();
 686         // Spaces at logical line breaks in bidi text must be skipped during
 687         // painting. However, they may appear visually in the middle
 688         // of a row; they must be skipped, wherever they are...
 689         // * logically "abc_[HEBREW_\nHEBREW]"
 690         // * visually "abc_[_WERBEH\nWERBEH]"
 691         pos_type skipped_sep_vpos = -1;
 692         pos_type body_pos = par_.beginOfBody();
 693         if (body_pos > 0 &&
 694                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 695                 body_pos = 0;
 696         }
 697
 698         LayoutPtr const & layout = par_.layout();
 699
 700         bool running_strikeout = false;
 701         bool is_struckout = false;
 702         int last_strikeout_x = 0;
 703
 704         // Use font span to speed things up, see below
 705         FontSpan font_span;
 706         Font font;
 707
 708         // If the last logical character is a separator, don't paint it, unless
 709         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 710         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 711                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 712
 713         for (pos_type vpos = row_.pos(); vpos < end; ) {
 714                 if (x_ > pi_.base.bv->workWidth())
 715                         break;
 716
 717                 // Skip the separator at the logical end of the row
 718                 if (vpos == skipped_sep_vpos) {
 719                         ++vpos;
 720                         continue;
 721                 }
 722
 723                 pos_type const pos = bidi_.vis2log(vpos);
 724
 725                 if (pos >= par_.size()) {
 726                         ++vpos;
 727                         continue;
 728                 }
 729
 730                 // Use font span to speed things up, see above
 731                 if (vpos < font_span.first || vpos > font_span.last) {
 732                         font_span = par_.fontSpan(vpos);
 733                         font = text_metrics_.getDisplayFont(pit_, vpos);
 734                 }
 735
 736                 const int width_pos = pm_.singleWidth(pos, font);
 737
 738                 if (x_ + width_pos < 0) {
 739                         x_ += width_pos;
 740                         ++vpos;
 741                         continue;
 742                 }
 743
 744                 is_struckout = par_.isDeleted(pos);
 745
 746                 if (is_struckout && !running_strikeout) {
 747                         running_strikeout = true;
 748                         last_strikeout_x = int(x_);
 749                 }
 750
 751                 bool const highly_editable_inset = par_.isInset(pos)
 752                         && isHighlyEditableInset(par_.getInset(pos));
 753
 754                 // If we reach the end of a struck out range, paint it.
 755                 // We also don't paint across things like tables
 756                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 757                         // Calculate 1/3 height of the buffer's default font
 758                         FontMetrics const & fm
 759                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 760                         int const middle = yo_ - fm.maxAscent() / 3;
 761                         pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 762                                 Color::deletedtext, Painter::line_solid, Painter::line_thin);
 763                         running_strikeout = false;
 764                 }
 765
 766                 if (body_pos > 0 && pos == body_pos - 1) {
 767                         int const lwidth = theFontMetrics(getLabelFont())
 768                                 .width(layout->labelsep);
 769
 770                         x_ += row_.label_hfill + lwidth - width_pos;
 771                 }
 772
 773                 if (par_.isHfill(pos)) {
 774                         paintHfill(pos, body_pos);
 775                         ++vpos;
 776
 777                 } else if (par_.isSeparator(pos)) {
 778                         Font orig_font = text_metrics_.getDisplayFont(pit_, pos);
 779                         double const orig_x = x_;
 780                         x_ += width_pos;
 781                         if (pos >= body_pos)
 782                                 x_ += row_.separator;
 783                         paintForeignMark(orig_x, orig_font);
 784                         ++vpos;
 785
 786                 } else if (par_.isInset(pos)) {
 787                         // If outer row has changed, nested insets are repaint completely.
 788                         Inset const * inset = par_.getInset(pos);
 789                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 790                         paintInset(inset, pos);
 791                         ++vpos;
 792
 793                 } else {
 794                         // paint as many characters as possible.
 795                         paintFromPos(vpos);
 796                 }
 797         }
 798
 799         // if we reach the end of a struck out range, paint it
 800         if (running_strikeout) {
 801                 // calculate 1/3 height of the buffer's default font
 802                 FontMetrics const & fm
 803                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 804                 int const middle = yo_ - fm.maxAscent() / 3;
 805                 pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 806                         Color::deletedtext, Painter::line_solid, Painter::line_thin);
 807                 running_strikeout = false;
 808         }
 809 }
 810
 811 } // namespace lyx