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 #include <algorithm>
  14
  15 #include "RowPainter.h"
  16
  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 "Language.h"
  24 #include "Layout.h"
  25 #include "LyXRC.h"
  26 #include "Row.h"
  27 #include "MetricsInfo.h"
  28 #include "Paragraph.h"
  29 #include "ParagraphParameters.h"
  30 #include "TextMetrics.h"
  31 #include "VSpace.h"
  32
  33 #include "frontends/FontMetrics.h"
  34 #include "frontends/Painter.h"
  35
  36 #include "insets/InsetText.h"
  37
  38 #include "mathed/InsetMath.h"
  39
  40 #include "support/debug.h"
  41 #include "support/gettext.h"
  42 #include "support/textutils.h"
  43
  44 #include "support/lassert.h"
  45 #include <boost/crc.hpp>
  46
  47 #include <stdlib.h>
  48
  49 using namespace std;
  50
  51 namespace lyx {
  52
  53 using frontend::Painter;
  54 using frontend::FontMetrics;
  55
  56
  57 RowPainter::RowPainter(PainterInfo & pi,
  58         Text const & text, Row const & row, int x, int y)
  59         : pi_(pi), text_(text),
  60           tm_(pi_.base.bv->textMetrics(&text)),
  61           pars_(text.paragraphs()),
  62           row_(row), par_(text.paragraphs()[row.pit()]),
  63           change_(pi_.change_),
  64           xo_(x), yo_(y)
  65 {
  66         x_ = row_.left_margin + xo_;
  67
  68         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  69         //row_.dump();
  70
  71         LBUFERR(row.pit() >= 0);
  72         LBUFERR(row.pit() < int(text.paragraphs().size()));
  73 }
  74
  75
  76 FontInfo RowPainter::labelFont(bool end) const
  77 {
  78         FontInfo f = text_.labelFont(par_);
  79         // selected text?
  80         if ((end ? row_.end_margin_sel : row_.begin_margin_sel)
  81             || pi_.selected)
  82                 f.setPaintColor(Color_selectiontext);
  83         return f;
  84 }
  85
  86
  87 // If you want to debug inset metrics uncomment the following line:
  88 //#define DEBUG_METRICS
  89 // This draws green lines around each inset.
  90
  91
  92 void RowPainter::paintInset(Row::Element const & e) const
  93 {
  94         // Handle selection
  95         bool const pi_selected = pi_.selected;
  96         Cursor const & cur = pi_.base.bv->cursor();
  97         if (cur.selection() && cur.text() == &text_
  98                 && cur.normalAnchor().text() == &text_)
  99                 pi_.selected = row_.sel_beg <= e.pos && row_.sel_end > e.pos;
 100
 101         LASSERT(e.inset, return);
 102         // Backup full_repaint status because some insets (InsetTabular)
 103         // requires a full repaint
 104         bool const pi_full_repaint = pi_.full_repaint;
 105         bool const pi_do_spellcheck = pi_.do_spellcheck;
 106         Change const pi_change = pi_.change_;
 107
 108         pi_.base.font = e.inset->inheritFont() ? e.font.fontInfo() :
 109                 pi_.base.bv->buffer().params().getFont().fontInfo();
 110         pi_.ltr_pos = !e.font.isVisibleRightToLeft();
 111         pi_.change_ = change_.changed() ? change_ : e.change;
 112         pi_.do_spellcheck &= e.inset->allowSpellCheck();
 113
 114         int const x1 = int(x_);
 115         pi_.base.bv->coordCache().insets().add(e.inset, x1, yo_);
 116         // insets are painted completely. Recursive
 117         // FIXME: it is wrong to completely paint the background
 118         // if we want to do single row painting.
 119         e.inset->drawBackground(pi_, x1, yo_);
 120         e.inset->drawSelection(pi_, x1, yo_);
 121         e.inset->draw(pi_, x1, yo_);
 122
 123         // Restore full_repaint status.
 124         pi_.full_repaint = pi_full_repaint;
 125         pi_.change_ = pi_change;
 126         pi_.do_spellcheck = pi_do_spellcheck;
 127         pi_.selected = pi_selected;
 128
 129 #ifdef DEBUG_METRICS
 130         Dimension const & dim = pi_.base.bv->coordCache().insets().dim(e.inset);
 131         int const x2 = x1 + dim.wid;
 132         int const y1 = yo_ + dim.des;
 133         int const y2 = yo_ - dim.asc;
 134         pi_.pain.line(x1, y1, x1, y2, Color_green);
 135         pi_.pain.line(x1, y1, x2, y1, Color_green);
 136         pi_.pain.line(x2, y1, x2, y2, Color_green);
 137         pi_.pain.line(x1, y2, x2, y2, Color_green);
 138 #endif
 139 }
 140
 141
 142 void RowPainter::paintLanguageMarkings(Row::Element const & e) const
 143 {
 144         paintForeignMark(e);
 145         paintNoSpellingMark(e);
 146 }
 147
 148
 149 void RowPainter::paintForeignMark(Row::Element const & e) const
 150 {
 151         Language const * lang = e.font.language();
 152         if (!lyxrc.mark_foreign_language)
 153                 return;
 154         if (lang == latex_language)
 155                 return;
 156         if (lang == pi_.base.bv->buffer().params().language)
 157                 return;
 158
 159         int const desc = e.inset ? e.dim.descent() : 0;
 160         int const y = yo_ + min(3 * pi_.base.solidLineOffset() / 2 + desc,
 161                                 row_.descent() - 1);
 162         pi_.pain.line(int(x_), y, int(x_ + e.full_width() - 1), y, Color_language,
 163                       Painter::line_solid, pi_.base.solidLineThickness());
 164 }
 165
 166
 167 void RowPainter::paintNoSpellingMark(Row::Element const & e) const
 168 {
 169         //if (!lyxrc.mark_no_spelling)
 170         //      return;
 171         if (e.font.language() == latex_language)
 172                 return;
 173         if (e.font.fontInfo().nospellcheck() != FONT_ON)
 174                 return;
 175
 176         // We at the same voffset than the misspelled mark, since
 177         // these two are mutually exclusive
 178         int const desc = e.inset ? e.dim.descent() : 0;
 179         int const y = yo_ + pi_.base.solidLineOffset() + desc
 180                 + pi_.base.solidLineThickness()
 181                 + (e.change.changed() ? pi_.base.solidLineThickness() + 1 : 0)
 182                 + 1;
 183         pi_.pain.line(int(x_), y, int(x_ + e.full_width()), y, Color_language,
 184                       Painter::line_onoffdash, pi_.base.solidLineThickness());
 185 }
 186
 187
 188 void RowPainter::paintMisspelledMark(Row::Element const & e) const
 189 {
 190         if (e.font.fontInfo().nospellcheck() == FONT_ON)
 191                 return;
 192         // if changed the misspelled marker gets placed slightly lower than normal
 193         // to avoid drawing at the same vertical offset
 194         FontMetrics const & fm = theFontMetrics(e.font);
 195         int const thickness = max(fm.lineWidth(), 2);
 196         int const y = yo_ + pi_.base.solidLineOffset() + pi_.base.solidLineThickness()
 197                 + (e.change.changed() ? pi_.base.solidLineThickness() + 1 : 0)
 198                 + 1 + thickness / 2;
 199
 200         //FIXME: this could be computed only once, it is probably not costly.
 201         // check for cursor position
 202         // don't draw misspelled marker for words at cursor position
 203         // we don't want to disturb the process of text editing
 204         DocIterator const nw = pi_.base.bv->cursor().newWord();
 205         pos_type cpos = -1;
 206         if (!nw.empty() && par_.id() == nw.paragraph().id()) {
 207                 cpos = nw.pos();
 208                 if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
 209                         --cpos;
 210                 else if (cpos > 0 && par_.isWordSeparator(cpos))
 211                         --cpos;
 212         }
 213
 214         pos_type pos = e.pos;
 215         while (pos < e.pos + pos_type(e.str.length())) {
 216                 if (!par_.isMisspelled(pos)) {
 217                         ++pos;
 218                         continue;
 219                 }
 220
 221                 FontSpan const & range = par_.getSpellRange(pos);
 222
 223                 // Skip element which are being edited
 224                 if (range.contains(cpos)) {
 225                         // the range includes the last element
 226                         pos = range.last + 1;
 227                         continue;
 228                 }
 229
 230                 int x1 = fm.pos2x(e.str, range.first - e.pos,
 231                                   e.isRTL(), e.extra);
 232                 int x2 = fm.pos2x(e.str, min(range.last - e.pos + 1,
 233                                                                          pos_type(e.str.length())),
 234                                                                          e.isRTL(), e.extra);
 235                 if (x1 > x2)
 236                         swap(x1, x2);
 237
 238                 pi_.pain.line(int(x_ + x1), y, int(x_ + x2), y,
 239                               Color_error,
 240                               Painter::line_onoffdash, thickness);
 241                 pos = range.last + 1;
 242         }
 243 }
 244
 245
 246 void RowPainter::paintStringAndSel(Row::Element const & e) const
 247 {
 248         // at least part of text selected?
 249         bool const some_sel = (e.endpos >= row_.sel_beg && e.pos < row_.sel_end)
 250                 || pi_.selected;
 251         // all the text selected?
 252         bool const all_sel = (e.pos >= row_.sel_beg && e.endpos < row_.sel_end)
 253                 || pi_.selected;
 254
 255         if (all_sel || e.change.changed()) {
 256                 Font copy = e.font;
 257                 Color const col = e.change.changed() ? e.change.color()
 258                                                      : Color_selectiontext;
 259                 copy.fontInfo().setPaintColor(col);
 260                 pi_.pain.text(int(x_), yo_, e.str, copy, e.extra, e.full_width());
 261         } else if (!some_sel) {
 262                 pi_.pain.text(int(x_), yo_, e.str, e.font, e.extra, e.full_width());
 263         } else {
 264                 pi_.pain.text(int(x_), yo_, e.str, e.font, Color_selectiontext,
 265                               max(row_.sel_beg, e.pos) - e.pos,
 266                               min(row_.sel_end, e.endpos) - e.pos,
 267                               e.extra, e.full_width());
 268         }
 269 }
 270
 271
 272 void RowPainter::paintTextDecoration(Row::Element const & e) const
 273 {
 274         // element selected?
 275         bool const sel = (e.pos >= row_.sel_beg && e.endpos <= row_.sel_end)
 276                 || pi_.selected;
 277         FontInfo copy = e.font.fontInfo();
 278         if (sel || e.change.changed()) {
 279                 Color const col = e.change.changed() ? e.change.color()
 280                                                      : Color_selectiontext;
 281                 copy.setPaintColor(col);
 282         }
 283         pi_.pain.textDecoration(copy, int(x_), yo_, int(e.full_width()));
 284 }
 285
 286
 287 void RowPainter::paintChange(Row::Element const & e) const
 288 {
 289         e.change.paintCue(pi_, x_, yo_, x_ + e.full_width(), e.font.fontInfo());
 290 }
 291
 292
 293 void RowPainter::paintChangeBar() const
 294 {
 295         int const height = tm_.isLastRow(row_)
 296                 ? row_.ascent()
 297                 : row_.height();
 298
 299         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 300 }
 301
 302
 303 void RowPainter::paintAppendix() const
 304 {
 305         // only draw the appendix frame once (for the main text)
 306         if (!par_.params().appendix() || !text_.isMainText())
 307                 return;
 308
 309         int y = yo_ - row_.ascent();
 310
 311         if (par_.params().startOfAppendix())
 312                 y += 2 * defaultRowHeight();
 313
 314         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 315         pi_.pain.line(tm_.width() - 2, y, tm_.width() - 2, yo_ + row_.height(), Color_appendix);
 316 }
 317
 318
 319 void RowPainter::paintDepthBar() const
 320 {
 321         depth_type const depth = par_.getDepth();
 322
 323         if (depth <= 0)
 324                 return;
 325
 326         depth_type prev_depth = 0;
 327         if (!tm_.isFirstRow(row_)) {
 328                 pit_type pit2 = row_.pit();
 329                 if (row_.pos() == 0)
 330                         --pit2;
 331                 prev_depth = pars_[pit2].getDepth();
 332         }
 333
 334         depth_type next_depth = 0;
 335         if (!tm_.isLastRow(row_)) {
 336                 pit_type pit2 = row_.pit();
 337                 if (row_.endpos() >= pars_[pit2].size())
 338                         ++pit2;
 339                 next_depth = pars_[pit2].getDepth();
 340         }
 341
 342         for (depth_type i = 1; i <= depth; ++i) {
 343                 int const w = nestMargin() / 5;
 344                 int x = int(xo_) + w * i;
 345                 // consider the bufferview left margin if we're drawing outermost text
 346                 if (text_.isMainText())
 347                         x += pi_.base.bv->leftMargin();
 348
 349                 int const starty = yo_ - row_.ascent();
 350                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 351
 352                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 353
 354                 if (i > prev_depth)
 355                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 356                 if (i > next_depth)
 357                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 358         }
 359 }
 360
 361
 362 void RowPainter::paintAppendixStart(int y) const
 363 {
 364         FontInfo pb_font = sane_font;
 365         pb_font.setColor(Color_appendix);
 366         pb_font.decSize();
 367
 368         int w = 0;
 369         int a = 0;
 370         int d = 0;
 371
 372         docstring const label = _("Appendix");
 373         theFontMetrics(pb_font).rectText(label, w, a, d);
 374
 375         int const text_start = int(xo_ + (tm_.width() - w) / 2);
 376         int const text_end = text_start + w;
 377
 378         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 379
 380         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 381         pi_.pain.line(text_end, y, int(xo_ + tm_.width() - 2), y, Color_appendix);
 382 }
 383
 384
 385 void RowPainter::paintTooLargeMarks(bool const left, bool const right) const
 386 {
 387         if (left)
 388                 pi_.pain.line(pi_.base.dottedLineThickness(), yo_ - row_.ascent(),
 389                                           pi_.base.dottedLineThickness(), yo_ + row_.descent(),
 390                                           Color_scroll, Painter::line_onoffdash,
 391                               pi_.base.dottedLineThickness());
 392         if (right) {
 393                 int const wwidth =
 394                         pi_.base.bv->workWidth() - pi_.base.dottedLineThickness();
 395                 pi_.pain.line(wwidth, yo_ - row_.ascent(),
 396                                           wwidth, yo_ + row_.descent(),
 397                                           Color_scroll, Painter::line_onoffdash,
 398                               pi_.base.dottedLineThickness());
 399         }
 400 }
 401
 402
 403 void RowPainter::paintFirst() const
 404 {
 405         Layout const & layout = par_.layout();
 406
 407         // start of appendix?
 408         if (par_.params().startOfAppendix())
 409             paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 410
 411         bool const is_first =
 412                 text_.isFirstInSequence(row_.pit()) || !layout.isParagraphGroup();
 413         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 414
 415         if (layout.labelIsInline()
 416             && (layout.labeltype != LABEL_STATIC || is_first))
 417                 paintLabel();
 418         else if (is_first && layout.labelIsAbove())
 419                 paintTopLevelLabel();
 420 }
 421
 422
 423 void RowPainter::paintLabel() const
 424 {
 425         docstring const & str = par_.labelString();
 426         if (str.empty())
 427                 return;
 428
 429         Layout const & layout = par_.layout();
 430         FontInfo const font = labelFont(false);
 431         FontMetrics const & fm = theFontMetrics(font);
 432         double x = x_;
 433
 434         if (row_.isRTL())
 435                 x = tm_.width() - row_.right_margin + fm.width(layout.labelsep);
 436         else
 437                 x = x_ - fm.width(layout.labelsep) - fm.width(str);
 438
 439         pi_.pain.text(int(x), yo_, str, font);
 440 }
 441
 442
 443 void RowPainter::paintTopLevelLabel() const
 444 {
 445         BufferParams const & bparams = pi_.base.bv->buffer().params();
 446         ParagraphParameters const & pparams = par_.params();
 447         Layout const & layout = par_.layout();
 448         FontInfo const font = labelFont(false);
 449         docstring const str = par_.labelString();
 450         if (str.empty())
 451                 return;
 452
 453         double spacing_val = 1.0;
 454         if (!pparams.spacing().isDefault())
 455                 spacing_val = pparams.spacing().getValue();
 456         else
 457                 spacing_val = bparams.spacing().getValue();
 458
 459         FontMetrics const & fm = theFontMetrics(font);
 460
 461         int const labeladdon = int(fm.maxHeight()
 462                 * layout.spacing.getValue() * spacing_val);
 463
 464         int maxdesc =
 465                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 466                 + (layout.labelbottomsep * defaultRowHeight()));
 467
 468         double x = x_;
 469         if (layout.labeltype == LABEL_CENTERED) {
 470                 x = row_.left_margin + (tm_.width() - row_.left_margin - row_.right_margin) / 2;
 471                 x -= fm.width(str) / 2;
 472         } else if (row_.isRTL()) {
 473                 x = tm_.width() - row_.right_margin - fm.width(str);
 474         }
 475         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 476 }
 477
 478
 479 /** Check if the current paragraph is the last paragraph in a
 480     proof environment */
 481 static int getEndLabel(pit_type p, Text const & text)
 482 {
 483         ParagraphList const & pars = text.paragraphs();
 484         pit_type pit = p;
 485         depth_type par_depth = pars[p].getDepth();
 486         while (pit != pit_type(pars.size())) {
 487                 Layout const & layout = pars[pit].layout();
 488                 int const endlabeltype = layout.endlabeltype;
 489
 490                 if (endlabeltype != END_LABEL_NO_LABEL) {
 491                         if (p + 1 == pit_type(pars.size()))
 492                                 return endlabeltype;
 493
 494                         depth_type const next_depth =
 495                                 pars[p + 1].getDepth();
 496                         if (par_depth > next_depth ||
 497                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 498                                 return endlabeltype;
 499                         break;
 500                 }
 501                 if (par_depth == 0)
 502                         break;
 503                 pit = text.outerHook(pit);
 504                 if (pit != pit_type(pars.size()))
 505                         par_depth = pars[pit].getDepth();
 506         }
 507         return END_LABEL_NO_LABEL;
 508 }
 509
 510
 511 void RowPainter::paintLast() const
 512 {
 513         int const endlabel = getEndLabel(row_.pit(), text_);
 514
 515         // paint imaginary end-of-paragraph character
 516
 517         Change const & change = par_.lookupChange(par_.size());
 518         if (change.changed()) {
 519                 FontMetrics const & fm =
 520                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 521                 int const length = fm.maxAscent() / 2;
 522                 Color col = change.color();
 523
 524                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 525                            Painter::line_solid, 3);
 526
 527                 if (change.deleted()) {
 528                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 529                                 yo_ + 2, col, Painter::line_solid, 3);
 530                 } else {
 531                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 532                                 yo_ + 2, col, Painter::line_solid, 3);
 533                 }
 534         }
 535
 536         // draw an endlabel
 537
 538         switch (endlabel) {
 539         case END_LABEL_BOX:
 540         case END_LABEL_FILLED_BOX: {
 541                 FontInfo font = labelFont(true);
 542                 if (font.realColor() != Color_selectiontext)
 543                         font.setPaintColor(Color_eolmarker);
 544                 FontMetrics const & fm = theFontMetrics(font);
 545                 int const size = int(0.75 * fm.maxAscent());
 546                 int const y = yo_ - size;
 547
 548                 // If needed, move the box a bit to avoid overlapping with text.
 549                 int x = 0;
 550                 if (row_.isRTL()) {
 551                         int const normal_x = nestMargin() + changebarMargin();
 552                         x = min(normal_x, row_.left_margin - size - Inset::TEXT_TO_INSET_OFFSET);
 553                 } else {
 554                         int const normal_x = tm_.width() - row_.right_margin
 555                                 - size - Inset::TEXT_TO_INSET_OFFSET;
 556                         x = max(normal_x, row_.width());
 557                 }
 558
 559                 if (endlabel == END_LABEL_BOX)
 560                         pi_.pain.rectangle(x, y, size, size, font.realColor());
 561                 else
 562                         pi_.pain.fillRectangle(x, y, size, size, font.realColor());
 563                 break;
 564         }
 565
 566         case END_LABEL_STATIC: {
 567                 FontInfo const font = labelFont(true);
 568                 FontMetrics const & fm = theFontMetrics(font);
 569                 docstring const & str = par_.layout().endlabelstring();
 570                 double const x = row_.isRTL() ? x_ - fm.width(str) : x_;
 571                 pi_.pain.text(int(x), yo_, str, font);
 572                 break;
 573         }
 574
 575         case END_LABEL_NO_LABEL:
 576                 break;
 577         }
 578 }
 579
 580
 581 void RowPainter::paintOnlyInsets()
 582 {
 583         Row::const_iterator cit = row_.begin();
 584         Row::const_iterator const & end = row_.end();
 585         for ( ; cit != end ; ++cit) {
 586                 Row::Element const & e = *cit;
 587                 if (e.type == Row::INSET) {
 588                         paintInset(e);
 589                         // The markings of foreign languages
 590                         // and of text ignored for spellchecking
 591                         paintLanguageMarkings(e);
 592                         // change tracking (not for insets that handle it themselves)
 593                         if (!e.inset->canPaintChange(*pi_.base.bv))
 594                                 paintChange(e);
 595                 }
 596
 597                 x_ += e.full_width();
 598         }
 599 }
 600
 601
 602 void RowPainter::paintText()
 603 {
 604         Row::const_iterator cit = row_.begin();
 605         Row::const_iterator const & end = row_.end();
 606         for ( ; cit != end ; ++cit) {
 607                 Row::Element const & e = *cit;
 608
 609                 switch (e.type) {
 610                 case Row::STRING:
 611                 case Row::VIRTUAL:
 612                         paintStringAndSel(e);
 613
 614                         // Paint the spelling marks if enabled.
 615                         if (lyxrc.spellcheck_continuously && pi_.do_spellcheck && !pi_.pain.isNull())
 616                                 paintMisspelledMark(e);
 617                         break;
 618
 619                 case Row::INSET:
 620                         paintInset(e);
 621                         paintTextDecoration(e);
 622                         break;
 623
 624                 case Row::SPACE:
 625                         paintTextDecoration(e);
 626                 }
 627
 628                 // The markings of foreign languages
 629                 // and of text ignored for spellchecking
 630                 paintLanguageMarkings(e);
 631
 632                 // change tracking (not for insets that handle it themselves)
 633                 if (e.type != Row::INSET || ! e.inset->canPaintChange(*pi_.base.bv))
 634                         paintChange(e);
 635
 636                 x_ += e.full_width();
 637         }
 638 }
 639
 640
 641 void RowPainter::paintSelection() const
 642 {
 643         if (!row_.selection())
 644                 return;
 645
 646         int const y1 = yo_ - row_.ascent();
 647         int const y2 = y1 + row_.height();
 648
 649         // draw the margins
 650         if (row_.isRTL() ? row_.end_margin_sel : row_.begin_margin_sel)
 651                 pi_.pain.fillRectangle(int(xo_), y1, row_.left_margin, y2 - y1,
 652                                        Color_selection);
 653
 654         // go through row and draw from RTL boundary to RTL boundary
 655         double x = xo_ + row_.left_margin;
 656         for (auto const & e : row_) {
 657                 // These are the same tests as in paintStringAndSel, except
 658                 // that all_sel has an additional clause that triggers for end
 659                 // of paragraph markers. The clause was not used in
 660                 // paintStringAndSel to avoid changing the drawing color.
 661                 // at least part of text selected?
 662                 bool const some_sel = (e.endpos >= row_.sel_beg && e.pos < row_.sel_end)
 663                         || pi_.selected;
 664                 // all the text selected?
 665                 bool const all_sel = (e.pos >= row_.sel_beg && e.endpos < row_.sel_end)
 666                     || (e.isVirtual() && e.pos == row_.endpos() && row_.end_margin_sel)
 667                     || pi_.selected;
 668
 669                 if (all_sel) {
 670                         // the 3rd argument is written like that to avoid rounding issues
 671                         pi_.pain.fillRectangle(int(x), y1,
 672                                                int(x + e.full_width()) - int(x), y2 - y1,
 673                                                Color_selection);
 674                 } else if (some_sel) {
 675                         pos_type const from = min(max(row_.sel_beg, e.pos), e.endpos);
 676                         pos_type const to = max(min(row_.sel_end, e.endpos), e.pos);
 677                         double x1 = e.pos2x(from);
 678                         double x2 = e.pos2x(to);
 679                         if (x1 > x2)
 680                                 swap(x1, x2);
 681                         // the 3rd argument is written like that to avoid rounding issues
 682                         pi_.pain.fillRectangle(int(x + x1), y1, int(x2 + x) - int(x1 + x),
 683                                                y2 - y1, Color_selection);
 684                 }
 685                 x += e.full_width();
 686         }
 687
 688         if (row_.isRTL() ? row_.begin_margin_sel : row_.end_margin_sel)
 689                 pi_.pain.fillRectangle(int(x), y1,
 690                                        int(xo_ + tm_.width()) - int(x), y2 - y1,
 691                                        Color_selection);
 692
 693 }
 694
 695
 696 } // namespace lyx