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