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