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_ + pi_.base.solidLineOffset()
 161                 + desc + pi_.base.solidLineThickness() / 2;
 162         pi_.pain.line(int(x_), y, int(x_ + e.full_width()), 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())
 174                 return;
 175
 176         int const desc = e.inset ? e.dim.descent() : 0;
 177         int const y = yo_ + pi_.base.solidLineOffset()
 178                 + desc + pi_.base.solidLineThickness() / 2;
 179         pi_.pain.line(int(x_), y, int(x_ + e.full_width()), y, Color_language,
 180                       Painter::line_onoffdash, pi_.base.solidLineThickness());
 181 }
 182
 183
 184 void RowPainter::paintMisspelledMark(Row::Element const & e) const
 185 {
 186         // if changed the misspelled marker gets placed slightly lower than normal
 187         // to avoid drawing at the same vertical offset
 188         FontMetrics const & fm = theFontMetrics(e.font);
 189         int const thickness = max(fm.lineWidth(), 2);
 190         int const y = yo_ + pi_.base.solidLineOffset() + pi_.base.solidLineThickness()
 191                 + (e.change.changed() ? pi_.base.solidLineThickness() + 1 : 0)
 192                 + 1 + thickness / 2;
 193
 194         //FIXME: this could be computed only once, it is probably not costly.
 195         // check for cursor position
 196         // don't draw misspelled marker for words at cursor position
 197         // we don't want to disturb the process of text editing
 198         DocIterator const nw = pi_.base.bv->cursor().newWord();
 199         pos_type cpos = -1;
 200         if (!nw.empty() && par_.id() == nw.paragraph().id()) {
 201                 cpos = nw.pos();
 202                 if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
 203                         --cpos;
 204                 else if (cpos > 0 && par_.isWordSeparator(cpos))
 205                         --cpos;
 206         }
 207
 208         pos_type pos = e.pos;
 209         while (pos < e.pos + pos_type(e.str.length())) {
 210                 if (!par_.isMisspelled(pos)) {
 211                         ++pos;
 212                         continue;
 213                 }
 214
 215                 FontSpan const & range = par_.getSpellRange(pos);
 216
 217                 // Skip element which are being edited
 218                 if (range.contains(cpos)) {
 219                         // the range includes the last element
 220                         pos = range.last + 1;
 221                         continue;
 222                 }
 223
 224                 int x1 = fm.pos2x(e.str, range.first - e.pos,
 225                                   e.isRTL(), e.extra);
 226                 int x2 = fm.pos2x(e.str, min(range.last - e.pos + 1,
 227                                                                          pos_type(e.str.length())),
 228                                                                          e.isRTL(), e.extra);
 229                 if (x1 > x2)
 230                         swap(x1, x2);
 231
 232                 pi_.pain.line(int(x_ + x1), y, int(x_ + x2), y,
 233                               Color_error,
 234                               Painter::line_onoffdash, thickness);
 235                 pos = range.last + 1;
 236         }
 237 }
 238
 239
 240 void RowPainter::paintStringAndSel(Row::Element const & e) const
 241 {
 242         // at least part of text selected?
 243         bool const some_sel = (e.endpos >= row_.sel_beg && e.pos < row_.sel_end)
 244                 || pi_.selected;
 245         // all the text selected?
 246         bool const all_sel = (e.pos >= row_.sel_beg && e.endpos < row_.sel_end)
 247                 || pi_.selected;
 248
 249         if (all_sel || e.change.changed()) {
 250                 Font copy = e.font;
 251                 Color const col = e.change.changed() ? e.change.color()
 252                                                      : Color_selectiontext;
 253                 copy.fontInfo().setPaintColor(col);
 254                 pi_.pain.text(int(x_), yo_, e.str, copy, e.extra, e.full_width());
 255         } else if (!some_sel) {
 256                 pi_.pain.text(int(x_), yo_, e.str, e.font, e.extra, e.full_width());
 257         } else {
 258                 pi_.pain.text(int(x_), yo_, e.str, e.font, Color_selectiontext,
 259                               max(row_.sel_beg, e.pos) - e.pos,
 260                               min(row_.sel_end, e.endpos) - e.pos,
 261                               e.extra, e.full_width());
 262         }
 263 }
 264
 265
 266 void RowPainter::paintChange(Row::Element const & e) const
 267 {
 268         e.change.paintCue(pi_, x_, yo_, x_ + e.full_width(), e.font.fontInfo());
 269 }
 270
 271
 272 void RowPainter::paintChangeBar() const
 273 {
 274         int const height = tm_.isLastRow(row_)
 275                 ? row_.ascent()
 276                 : row_.height();
 277
 278         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 279 }
 280
 281
 282 void RowPainter::paintAppendix() const
 283 {
 284         // only draw the appendix frame once (for the main text)
 285         if (!par_.params().appendix() || !text_.isMainText())
 286                 return;
 287
 288         int y = yo_ - row_.ascent();
 289
 290         if (par_.params().startOfAppendix())
 291                 y += 2 * defaultRowHeight();
 292
 293         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 294         pi_.pain.line(tm_.width() - 2, y, tm_.width() - 2, yo_ + row_.height(), Color_appendix);
 295 }
 296
 297
 298 void RowPainter::paintDepthBar() const
 299 {
 300         depth_type const depth = par_.getDepth();
 301
 302         if (depth <= 0)
 303                 return;
 304
 305         depth_type prev_depth = 0;
 306         if (!tm_.isFirstRow(row_)) {
 307                 pit_type pit2 = row_.pit();
 308                 if (row_.pos() == 0)
 309                         --pit2;
 310                 prev_depth = pars_[pit2].getDepth();
 311         }
 312
 313         depth_type next_depth = 0;
 314         if (!tm_.isLastRow(row_)) {
 315                 pit_type pit2 = row_.pit();
 316                 if (row_.endpos() >= pars_[pit2].size())
 317                         ++pit2;
 318                 next_depth = pars_[pit2].getDepth();
 319         }
 320
 321         for (depth_type i = 1; i <= depth; ++i) {
 322                 int const w = nestMargin() / 5;
 323                 int x = int(xo_) + w * i;
 324                 // only consider the changebar space if we're drawing outermost text
 325                 if (text_.isMainText())
 326                         x += changebarMargin();
 327
 328                 int const starty = yo_ - row_.ascent();
 329                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 330
 331                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 332
 333                 if (i > prev_depth)
 334                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 335                 if (i > next_depth)
 336                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 337         }
 338 }
 339
 340
 341 void RowPainter::paintAppendixStart(int y) const
 342 {
 343         FontInfo pb_font = sane_font;
 344         pb_font.setColor(Color_appendix);
 345         pb_font.decSize();
 346
 347         int w = 0;
 348         int a = 0;
 349         int d = 0;
 350
 351         docstring const label = _("Appendix");
 352         theFontMetrics(pb_font).rectText(label, w, a, d);
 353
 354         int const text_start = int(xo_ + (tm_.width() - w) / 2);
 355         int const text_end = text_start + w;
 356
 357         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 358
 359         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 360         pi_.pain.line(text_end, y, int(xo_ + tm_.width() - 2), y, Color_appendix);
 361 }
 362
 363
 364 void RowPainter::paintTooLargeMarks(bool const left, bool const right) const
 365 {
 366         if (left)
 367                 pi_.pain.line(pi_.base.dottedLineThickness(), yo_ - row_.ascent(),
 368                                           pi_.base.dottedLineThickness(), yo_ + row_.descent(),
 369                                           Color_scroll, Painter::line_onoffdash,
 370                               pi_.base.dottedLineThickness());
 371         if (right) {
 372                 int const wwidth =
 373                         pi_.base.bv->workWidth() - pi_.base.dottedLineThickness();
 374                 pi_.pain.line(wwidth, yo_ - row_.ascent(),
 375                                           wwidth, yo_ + row_.descent(),
 376                                           Color_scroll, Painter::line_onoffdash,
 377                               pi_.base.dottedLineThickness());
 378         }
 379 }
 380
 381
 382 void RowPainter::paintFirst() const
 383 {
 384         Layout const & layout = par_.layout();
 385
 386         // start of appendix?
 387         if (par_.params().startOfAppendix())
 388             paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 389
 390         bool const is_first =
 391                 text_.isFirstInSequence(row_.pit()) || !layout.isParagraphGroup();
 392         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 393
 394         if (layout.labelIsInline()
 395             && (layout.labeltype != LABEL_STATIC || is_first))
 396                 paintLabel();
 397         else if (is_first && layout.labelIsAbove())
 398                 paintTopLevelLabel();
 399 }
 400
 401
 402 void RowPainter::paintLabel() const
 403 {
 404         docstring const & str = par_.labelString();
 405         if (str.empty())
 406                 return;
 407
 408         Layout const & layout = par_.layout();
 409         FontInfo const font = labelFont(false);
 410         FontMetrics const & fm = theFontMetrics(font);
 411         double x = x_;
 412
 413         if (row_.isRTL())
 414                 x = tm_.width() - row_.right_margin + fm.width(layout.labelsep);
 415         else
 416                 x = x_ - fm.width(layout.labelsep) - fm.width(str);
 417
 418         pi_.pain.text(int(x), yo_, str, font);
 419 }
 420
 421
 422 void RowPainter::paintTopLevelLabel() const
 423 {
 424         BufferParams const & bparams = pi_.base.bv->buffer().params();
 425         ParagraphParameters const & pparams = par_.params();
 426         Layout const & layout = par_.layout();
 427         FontInfo const font = labelFont(false);
 428         docstring const str = par_.labelString();
 429         if (str.empty())
 430                 return;
 431
 432         double spacing_val = 1.0;
 433         if (!pparams.spacing().isDefault())
 434                 spacing_val = pparams.spacing().getValue();
 435         else
 436                 spacing_val = bparams.spacing().getValue();
 437
 438         FontMetrics const & fm = theFontMetrics(font);
 439
 440         int const labeladdon = int(fm.maxHeight()
 441                 * layout.spacing.getValue() * spacing_val);
 442
 443         int maxdesc =
 444                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 445                 + (layout.labelbottomsep * defaultRowHeight()));
 446
 447         double x = x_;
 448         if (layout.labeltype == LABEL_CENTERED) {
 449                 x = row_.left_margin + (tm_.width() - row_.left_margin - row_.right_margin) / 2;
 450                 x -= fm.width(str) / 2;
 451         } else if (row_.isRTL()) {
 452                 x = tm_.width() - row_.right_margin - fm.width(str);
 453         }
 454         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 455 }
 456
 457
 458 /** Check if the current paragraph is the last paragraph in a
 459     proof environment */
 460 static int getEndLabel(pit_type p, Text const & text)
 461 {
 462         ParagraphList const & pars = text.paragraphs();
 463         pit_type pit = p;
 464         depth_type par_depth = pars[p].getDepth();
 465         while (pit != pit_type(pars.size())) {
 466                 Layout const & layout = pars[pit].layout();
 467                 int const endlabeltype = layout.endlabeltype;
 468
 469                 if (endlabeltype != END_LABEL_NO_LABEL) {
 470                         if (p + 1 == pit_type(pars.size()))
 471                                 return endlabeltype;
 472
 473                         depth_type const next_depth =
 474                                 pars[p + 1].getDepth();
 475                         if (par_depth > next_depth ||
 476                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 477                                 return endlabeltype;
 478                         break;
 479                 }
 480                 if (par_depth == 0)
 481                         break;
 482                 pit = text.outerHook(pit);
 483                 if (pit != pit_type(pars.size()))
 484                         par_depth = pars[pit].getDepth();
 485         }
 486         return END_LABEL_NO_LABEL;
 487 }
 488
 489
 490 void RowPainter::paintLast() const
 491 {
 492         int const endlabel = getEndLabel(row_.pit(), text_);
 493
 494         // paint imaginary end-of-paragraph character
 495
 496         Change const & change = par_.lookupChange(par_.size());
 497         if (change.changed()) {
 498                 FontMetrics const & fm =
 499                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 500                 int const length = fm.maxAscent() / 2;
 501                 Color col = change.color();
 502
 503                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 504                            Painter::line_solid, 3);
 505
 506                 if (change.deleted()) {
 507                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 508                                 yo_ + 2, col, Painter::line_solid, 3);
 509                 } else {
 510                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 511                                 yo_ + 2, col, Painter::line_solid, 3);
 512                 }
 513         }
 514
 515         // draw an endlabel
 516
 517         switch (endlabel) {
 518         case END_LABEL_BOX:
 519         case END_LABEL_FILLED_BOX: {
 520                 FontInfo font = labelFont(true);
 521                 if (font.realColor() != Color_selectiontext)
 522                         font.setPaintColor(Color_eolmarker);
 523                 FontMetrics const & fm = theFontMetrics(font);
 524                 int const size = int(0.75 * fm.maxAscent());
 525                 int const y = yo_ - size;
 526
 527                 // If needed, move the box a bit to avoid overlapping with text.
 528                 int x = 0;
 529                 if (row_.isRTL()) {
 530                         int const normal_x = nestMargin() + changebarMargin();
 531                         x = min(normal_x, row_.left_margin - size - Inset::TEXT_TO_INSET_OFFSET);
 532                 } else {
 533                         int const normal_x = tm_.width() - row_.right_margin
 534                                 - size - Inset::TEXT_TO_INSET_OFFSET;
 535                         x = max(normal_x, row_.width());
 536                 }
 537
 538                 if (endlabel == END_LABEL_BOX)
 539                         pi_.pain.rectangle(x, y, size, size, font.realColor());
 540                 else
 541                         pi_.pain.fillRectangle(x, y, size, size, font.realColor());
 542                 break;
 543         }
 544
 545         case END_LABEL_STATIC: {
 546                 FontInfo const font = labelFont(true);
 547                 FontMetrics const & fm = theFontMetrics(font);
 548                 docstring const & str = par_.layout().endlabelstring();
 549                 double const x = row_.isRTL() ? x_ - fm.width(str) : x_;
 550                 pi_.pain.text(int(x), yo_, str, font);
 551                 break;
 552         }
 553
 554         case END_LABEL_NO_LABEL:
 555                 break;
 556         }
 557 }
 558
 559
 560 void RowPainter::paintOnlyInsets()
 561 {
 562         Row::const_iterator cit = row_.begin();
 563         Row::const_iterator const & end = row_.end();
 564         for ( ; cit != end ; ++cit) {
 565                 Row::Element const & e = *cit;
 566                 if (e.type == Row::INSET) {
 567                         paintInset(e);
 568                         // The markings of foreign languages
 569                         // and of text ignored for spellchecking
 570                         paintLanguageMarkings(e);
 571                         // change tracking (not for insets that handle it themselves)
 572                         if (!e.inset->canPaintChange(*pi_.base.bv))
 573                                 paintChange(e);
 574                 }
 575
 576                 x_ += e.full_width();
 577         }
 578 }
 579
 580
 581 void RowPainter::paintText()
 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
 588                 switch (e.type) {
 589                 case Row::STRING:
 590                 case Row::VIRTUAL:
 591                         paintStringAndSel(e);
 592
 593                         // Paint the spelling marks if enabled.
 594                         if (lyxrc.spellcheck_continuously && pi_.do_spellcheck && !pi_.pain.isNull())
 595                                 paintMisspelledMark(e);
 596                         break;
 597
 598                 case Row::INSET:
 599                         paintInset(e);
 600                         break;
 601
 602                 case Row::SPACE:
 603                         pi_.pain.textDecoration(e.font.fontInfo(), int(x_), yo_, int(e.full_width()));
 604                 }
 605
 606                 // The markings of foreign languages
 607                 // and of text ignored for spellchecking
 608                 paintLanguageMarkings(e);
 609
 610                 // change tracking (not for insets that handle it themselves)
 611                 if (e.type != Row::INSET || ! e.inset->canPaintChange(*pi_.base.bv))
 612                         paintChange(e);
 613
 614                 x_ += e.full_width();
 615         }
 616 }
 617
 618
 619 void RowPainter::paintSelection() const
 620 {
 621         if (!row_.selection())
 622                 return;
 623
 624         int const y1 = yo_ - row_.ascent();
 625         int const y2 = y1 + row_.height();
 626
 627         // draw the margins
 628         if (row_.isRTL() ? row_.end_margin_sel : row_.begin_margin_sel)
 629                 pi_.pain.fillRectangle(int(xo_), y1, row_.left_margin, y2 - y1,
 630                                        Color_selection);
 631
 632         // go through row and draw from RTL boundary to RTL boundary
 633         double x = xo_ + row_.left_margin;
 634         for (auto const & e : row_) {
 635                 // These are the same tests as in paintStringAndSel, except
 636                 // that all_sel has an additional clause that triggers for end
 637                 // of paragraph markers. The clause was not used in
 638                 // paintStringAndSel to avoid changing the drawing color.
 639                 // at least part of text selected?
 640                 bool const some_sel = (e.endpos >= row_.sel_beg && e.pos < row_.sel_end)
 641                         || pi_.selected;
 642                 // all the text selected?
 643                 bool const all_sel = (e.pos >= row_.sel_beg && e.endpos < row_.sel_end)
 644                     || (e.isVirtual() && e.pos == row_.endpos() && row_.end_margin_sel)
 645                     || pi_.selected;
 646
 647                 if (all_sel) {
 648                         // the 3rd argument is written like that to avoid rounding issues
 649                         pi_.pain.fillRectangle(int(x), y1,
 650                                                int(x + e.full_width()) - int(x), y2 - y1,
 651                                                Color_selection);
 652                 } else if (some_sel) {
 653                         pos_type const from = min(max(row_.sel_beg, e.pos), e.endpos);
 654                         pos_type const to = max(min(row_.sel_end, e.endpos), e.pos);
 655                         double x1 = e.pos2x(from);
 656                         double x2 = e.pos2x(to);
 657                         if (x1 > x2)
 658                                 swap(x1, x2);
 659                         // the 3rd argument is written like that to avoid rounding issues
 660                         pi_.pain.fillRectangle(int(x + x1), y1, int(x2 + x) - int(x1 + x),
 661                                                y2 - y1, Color_selection);
 662                 }
 663                 x += e.full_width();
 664         }
 665
 666         if (row_.isRTL() ? row_.begin_margin_sel : row_.end_margin_sel)
 667                 pi_.pain.fillRectangle(int(x), y1,
 668                                        int(xo_ + tm_.width()) - int(x), y2 - y1,
 669                                        Color_selection);
 670
 671 }
 672
 673
 674 } // namespace lyx