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