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