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