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