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