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::paintChange(Row::Element const & e) const
 273 {
 274         e.change.paintCue(pi_, x_, yo_, x_ + e.full_width(), e.font.fontInfo());
 275 }
 276
 277
 278 void RowPainter::paintChangeBar() const
 279 {
 280         int const height = tm_.isLastRow(row_)
 281                 ? row_.ascent()
 282                 : row_.height();
 283
 284         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 285 }
 286
 287
 288 void RowPainter::paintAppendix() const
 289 {
 290         // only draw the appendix frame once (for the main text)
 291         if (!par_.params().appendix() || !text_.isMainText())
 292                 return;
 293
 294         int y = yo_ - row_.ascent();
 295
 296         if (par_.params().startOfAppendix())
 297                 y += 2 * defaultRowHeight();
 298
 299         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 300         pi_.pain.line(tm_.width() - 2, y, tm_.width() - 2, yo_ + row_.height(), Color_appendix);
 301 }
 302
 303
 304 void RowPainter::paintDepthBar() const
 305 {
 306         depth_type const depth = par_.getDepth();
 307
 308         if (depth <= 0)
 309                 return;
 310
 311         depth_type prev_depth = 0;
 312         if (!tm_.isFirstRow(row_)) {
 313                 pit_type pit2 = row_.pit();
 314                 if (row_.pos() == 0)
 315                         --pit2;
 316                 prev_depth = pars_[pit2].getDepth();
 317         }
 318
 319         depth_type next_depth = 0;
 320         if (!tm_.isLastRow(row_)) {
 321                 pit_type pit2 = row_.pit();
 322                 if (row_.endpos() >= pars_[pit2].size())
 323                         ++pit2;
 324                 next_depth = pars_[pit2].getDepth();
 325         }
 326
 327         for (depth_type i = 1; i <= depth; ++i) {
 328                 int const w = nestMargin() / 5;
 329                 int x = int(xo_) + w * i;
 330                 // only consider the changebar space if we're drawing outermost text
 331                 if (text_.isMainText())
 332                         x += changebarMargin();
 333
 334                 int const starty = yo_ - row_.ascent();
 335                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 336
 337                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 338
 339                 if (i > prev_depth)
 340                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 341                 if (i > next_depth)
 342                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 343         }
 344 }
 345
 346
 347 void RowPainter::paintAppendixStart(int y) const
 348 {
 349         FontInfo pb_font = sane_font;
 350         pb_font.setColor(Color_appendix);
 351         pb_font.decSize();
 352
 353         int w = 0;
 354         int a = 0;
 355         int d = 0;
 356
 357         docstring const label = _("Appendix");
 358         theFontMetrics(pb_font).rectText(label, w, a, d);
 359
 360         int const text_start = int(xo_ + (tm_.width() - w) / 2);
 361         int const text_end = text_start + w;
 362
 363         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 364
 365         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 366         pi_.pain.line(text_end, y, int(xo_ + tm_.width() - 2), y, Color_appendix);
 367 }
 368
 369
 370 void RowPainter::paintTooLargeMarks(bool const left, bool const right) const
 371 {
 372         if (left)
 373                 pi_.pain.line(pi_.base.dottedLineThickness(), yo_ - row_.ascent(),
 374                                           pi_.base.dottedLineThickness(), yo_ + row_.descent(),
 375                                           Color_scroll, Painter::line_onoffdash,
 376                               pi_.base.dottedLineThickness());
 377         if (right) {
 378                 int const wwidth =
 379                         pi_.base.bv->workWidth() - pi_.base.dottedLineThickness();
 380                 pi_.pain.line(wwidth, yo_ - row_.ascent(),
 381                                           wwidth, yo_ + row_.descent(),
 382                                           Color_scroll, Painter::line_onoffdash,
 383                               pi_.base.dottedLineThickness());
 384         }
 385 }
 386
 387
 388 void RowPainter::paintFirst() const
 389 {
 390         Layout const & layout = par_.layout();
 391
 392         // start of appendix?
 393         if (par_.params().startOfAppendix())
 394             paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 395
 396         bool const is_first =
 397                 text_.isFirstInSequence(row_.pit()) || !layout.isParagraphGroup();
 398         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 399
 400         if (layout.labelIsInline()
 401             && (layout.labeltype != LABEL_STATIC || is_first))
 402                 paintLabel();
 403         else if (is_first && layout.labelIsAbove())
 404                 paintTopLevelLabel();
 405 }
 406
 407
 408 void RowPainter::paintLabel() const
 409 {
 410         docstring const & str = par_.labelString();
 411         if (str.empty())
 412                 return;
 413
 414         Layout const & layout = par_.layout();
 415         FontInfo const font = labelFont(false);
 416         FontMetrics const & fm = theFontMetrics(font);
 417         double x = x_;
 418
 419         if (row_.isRTL())
 420                 x = tm_.width() - row_.right_margin + fm.width(layout.labelsep);
 421         else
 422                 x = x_ - fm.width(layout.labelsep) - fm.width(str);
 423
 424         pi_.pain.text(int(x), yo_, str, font);
 425 }
 426
 427
 428 void RowPainter::paintTopLevelLabel() const
 429 {
 430         BufferParams const & bparams = pi_.base.bv->buffer().params();
 431         ParagraphParameters const & pparams = par_.params();
 432         Layout const & layout = par_.layout();
 433         FontInfo const font = labelFont(false);
 434         docstring const str = par_.labelString();
 435         if (str.empty())
 436                 return;
 437
 438         double spacing_val = 1.0;
 439         if (!pparams.spacing().isDefault())
 440                 spacing_val = pparams.spacing().getValue();
 441         else
 442                 spacing_val = bparams.spacing().getValue();
 443
 444         FontMetrics const & fm = theFontMetrics(font);
 445
 446         int const labeladdon = int(fm.maxHeight()
 447                 * layout.spacing.getValue() * spacing_val);
 448
 449         int maxdesc =
 450                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 451                 + (layout.labelbottomsep * defaultRowHeight()));
 452
 453         double x = x_;
 454         if (layout.labeltype == LABEL_CENTERED) {
 455                 x = row_.left_margin + (tm_.width() - row_.left_margin - row_.right_margin) / 2;
 456                 x -= fm.width(str) / 2;
 457         } else if (row_.isRTL()) {
 458                 x = tm_.width() - row_.right_margin - fm.width(str);
 459         }
 460         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 461 }
 462
 463
 464 /** Check if the current paragraph is the last paragraph in a
 465     proof environment */
 466 static int getEndLabel(pit_type p, Text const & text)
 467 {
 468         ParagraphList const & pars = text.paragraphs();
 469         pit_type pit = p;
 470         depth_type par_depth = pars[p].getDepth();
 471         while (pit != pit_type(pars.size())) {
 472                 Layout const & layout = pars[pit].layout();
 473                 int const endlabeltype = layout.endlabeltype;
 474
 475                 if (endlabeltype != END_LABEL_NO_LABEL) {
 476                         if (p + 1 == pit_type(pars.size()))
 477                                 return endlabeltype;
 478
 479                         depth_type const next_depth =
 480                                 pars[p + 1].getDepth();
 481                         if (par_depth > next_depth ||
 482                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 483                                 return endlabeltype;
 484                         break;
 485                 }
 486                 if (par_depth == 0)
 487                         break;
 488                 pit = text.outerHook(pit);
 489                 if (pit != pit_type(pars.size()))
 490                         par_depth = pars[pit].getDepth();
 491         }
 492         return END_LABEL_NO_LABEL;
 493 }
 494
 495
 496 void RowPainter::paintLast() const
 497 {
 498         int const endlabel = getEndLabel(row_.pit(), text_);
 499
 500         // paint imaginary end-of-paragraph character
 501
 502         Change const & change = par_.lookupChange(par_.size());
 503         if (change.changed()) {
 504                 FontMetrics const & fm =
 505                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 506                 int const length = fm.maxAscent() / 2;
 507                 Color col = change.color();
 508
 509                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 510                            Painter::line_solid, 3);
 511
 512                 if (change.deleted()) {
 513                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 514                                 yo_ + 2, col, Painter::line_solid, 3);
 515                 } else {
 516                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 517                                 yo_ + 2, col, Painter::line_solid, 3);
 518                 }
 519         }
 520
 521         // draw an endlabel
 522
 523         switch (endlabel) {
 524         case END_LABEL_BOX:
 525         case END_LABEL_FILLED_BOX: {
 526                 FontInfo font = labelFont(true);
 527                 if (font.realColor() != Color_selectiontext)
 528                         font.setPaintColor(Color_eolmarker);
 529                 FontMetrics const & fm = theFontMetrics(font);
 530                 int const size = int(0.75 * fm.maxAscent());
 531                 int const y = yo_ - size;
 532
 533                 // If needed, move the box a bit to avoid overlapping with text.
 534                 int x = 0;
 535                 if (row_.isRTL()) {
 536                         int const normal_x = nestMargin() + changebarMargin();
 537                         x = min(normal_x, row_.left_margin - size - Inset::TEXT_TO_INSET_OFFSET);
 538                 } else {
 539                         int const normal_x = tm_.width() - row_.right_margin
 540                                 - size - Inset::TEXT_TO_INSET_OFFSET;
 541                         x = max(normal_x, row_.width());
 542                 }
 543
 544                 if (endlabel == END_LABEL_BOX)
 545                         pi_.pain.rectangle(x, y, size, size, font.realColor());
 546                 else
 547                         pi_.pain.fillRectangle(x, y, size, size, font.realColor());
 548                 break;
 549         }
 550
 551         case END_LABEL_STATIC: {
 552                 FontInfo const font = labelFont(true);
 553                 FontMetrics const & fm = theFontMetrics(font);
 554                 docstring const & str = par_.layout().endlabelstring();
 555                 double const x = row_.isRTL() ? x_ - fm.width(str) : x_;
 556                 pi_.pain.text(int(x), yo_, str, font);
 557                 break;
 558         }
 559
 560         case END_LABEL_NO_LABEL:
 561                 break;
 562         }
 563 }
 564
 565
 566 void RowPainter::paintOnlyInsets()
 567 {
 568         Row::const_iterator cit = row_.begin();
 569         Row::const_iterator const & end = row_.end();
 570         for ( ; cit != end ; ++cit) {
 571                 Row::Element const & e = *cit;
 572                 if (e.type == Row::INSET) {
 573                         paintInset(e);
 574                         // The markings of foreign languages
 575                         // and of text ignored for spellchecking
 576                         paintLanguageMarkings(e);
 577                         // change tracking (not for insets that handle it themselves)
 578                         if (!e.inset->canPaintChange(*pi_.base.bv))
 579                                 paintChange(e);
 580                 }
 581
 582                 x_ += e.full_width();
 583         }
 584 }
 585
 586
 587 void RowPainter::paintText()
 588 {
 589         Row::const_iterator cit = row_.begin();
 590         Row::const_iterator const & end = row_.end();
 591         for ( ; cit != end ; ++cit) {
 592                 Row::Element const & e = *cit;
 593
 594                 switch (e.type) {
 595                 case Row::STRING:
 596                 case Row::VIRTUAL:
 597                         paintStringAndSel(e);
 598
 599                         // Paint the spelling marks if enabled.
 600                         if (lyxrc.spellcheck_continuously && pi_.do_spellcheck && !pi_.pain.isNull())
 601                                 paintMisspelledMark(e);
 602                         break;
 603
 604                 case Row::INSET:
 605                         paintInset(e);
 606                         break;
 607
 608                 case Row::SPACE:
 609                         pi_.pain.textDecoration(e.font.fontInfo(), int(x_), yo_, int(e.full_width()));
 610                 }
 611
 612                 // The markings of foreign languages
 613                 // and of text ignored for spellchecking
 614                 paintLanguageMarkings(e);
 615
 616                 // change tracking (not for insets that handle it themselves)
 617                 if (e.type != Row::INSET || ! e.inset->canPaintChange(*pi_.base.bv))
 618                         paintChange(e);
 619
 620                 x_ += e.full_width();
 621         }
 622 }
 623
 624
 625 void RowPainter::paintSelection() const
 626 {
 627         if (!row_.selection())
 628                 return;
 629
 630         int const y1 = yo_ - row_.ascent();
 631         int const y2 = y1 + row_.height();
 632
 633         // draw the margins
 634         if (row_.isRTL() ? row_.end_margin_sel : row_.begin_margin_sel)
 635                 pi_.pain.fillRectangle(int(xo_), y1, row_.left_margin, y2 - y1,
 636                                        Color_selection);
 637
 638         // go through row and draw from RTL boundary to RTL boundary
 639         double x = xo_ + row_.left_margin;
 640         for (auto const & e : row_) {
 641                 // These are the same tests as in paintStringAndSel, except
 642                 // that all_sel has an additional clause that triggers for end
 643                 // of paragraph markers. The clause was not used in
 644                 // paintStringAndSel to avoid changing the drawing color.
 645                 // at least part of text selected?
 646                 bool const some_sel = (e.endpos >= row_.sel_beg && e.pos < row_.sel_end)
 647                         || pi_.selected;
 648                 // all the text selected?
 649                 bool const all_sel = (e.pos >= row_.sel_beg && e.endpos < row_.sel_end)
 650                     || (e.isVirtual() && e.pos == row_.endpos() && row_.end_margin_sel)
 651                     || pi_.selected;
 652
 653                 if (all_sel) {
 654                         // the 3rd argument is written like that to avoid rounding issues
 655                         pi_.pain.fillRectangle(int(x), y1,
 656                                                int(x + e.full_width()) - int(x), y2 - y1,
 657                                                Color_selection);
 658                 } else if (some_sel) {
 659                         pos_type const from = min(max(row_.sel_beg, e.pos), e.endpos);
 660                         pos_type const to = max(min(row_.sel_end, e.endpos), e.pos);
 661                         double x1 = e.pos2x(from);
 662                         double x2 = e.pos2x(to);
 663                         if (x1 > x2)
 664                                 swap(x1, x2);
 665                         // the 3rd argument is written like that to avoid rounding issues
 666                         pi_.pain.fillRectangle(int(x + x1), y1, int(x2 + x) - int(x1 + x),
 667                                                y2 - y1, Color_selection);
 668                 }
 669                 x += e.full_width();
 670         }
 671
 672         if (row_.isRTL() ? row_.begin_margin_sel : row_.end_margin_sel)
 673                 pi_.pain.fillRectangle(int(x), y1,
 674                                        int(xo_ + tm_.width()) - int(x), y2 - y1,
 675                                        Color_selection);
 676
 677 }
 678
 679
 680 } // namespace lyx