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 "ParagraphMetrics.h"
  30 #include "ParagraphParameters.h"
  31 #include "TextMetrics.h"
  32 #include "VSpace.h"
  33
  34 #include "frontends/FontMetrics.h"
  35 #include "frontends/Painter.h"
  36
  37 #include "insets/InsetText.h"
  38
  39 #include "mathed/InsetMath.h"
  40
  41 #include "support/debug.h"
  42 #include "support/gettext.h"
  43 #include "support/textutils.h"
  44
  45 #include "support/lassert.h"
  46 #include <boost/crc.hpp>
  47
  48 using namespace std;
  49
  50 namespace lyx {
  51
  52 using frontend::Painter;
  53 using frontend::FontMetrics;
  54
  55
  56 RowPainter::RowPainter(PainterInfo & pi,
  57         Text const & text, pit_type pit, Row const & row, int x, int y)
  58         : pi_(pi), text_(text),
  59           text_metrics_(pi_.base.bv->textMetrics(&text)),
  60           pars_(text.paragraphs()),
  61           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  62           pm_(text_metrics_.parMetrics(pit)), change_(pi_.change_),
  63           xo_(x), yo_(y), width_(text_metrics_.width()),
  64           solid_line_thickness_(1), solid_line_offset_(1),
  65           dotted_line_thickness_(1), dotted_line_offset_(2)
  66 {
  67         if (lyxrc.zoom >= 200) {
  68                 // derive the line thickness from zoom factor
  69                 // the zoom is given in percent
  70                 // (increase thickness at 250%, 450% etc.)
  71                 solid_line_thickness_ = (lyxrc.zoom + 50) / 200;
  72                 // adjust line_offset_ too
  73                 solid_line_offset_ = 1 + solid_line_thickness_ / 2;
  74         }
  75         if (lyxrc.zoom >= 100) {
  76                 // derive the line thickness from zoom factor
  77                 // the zoom is given in percent
  78                 // (increase thickness at 150%, 250% etc.)
  79                 dotted_line_thickness_ = (lyxrc.zoom + 50) / 100;
  80                 // adjust line_offset_ too
  81                 dotted_line_offset_ = 1 + dotted_line_thickness_ / 2;
  82         }
  83
  84         x_ = row_.left_margin + xo_;
  85
  86         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  87         //row_.dump();
  88
  89         LBUFERR(pit >= 0);
  90         LBUFERR(pit < int(text.paragraphs().size()));
  91 }
  92
  93
  94 FontInfo RowPainter::labelFont() const
  95 {
  96         FontInfo f = text_.labelFont(par_);
  97         // selected text?
  98         if (row_.begin_margin_sel || pi_.selected)
  99                 f.setPaintColor(Color_selectiontext);
 100         return f;
 101 }
 102
 103
 104 // If you want to debug inset metrics uncomment the following line:
 105 //#define DEBUG_METRICS
 106 // This draws green lines around each inset.
 107
 108
 109 void RowPainter::paintInset(Inset const * inset, Font const & font,
 110                             Change const & change,
 111                             pos_type const pos)
 112 {
 113         // Handle selection
 114         bool const pi_selected = pi_.selected;
 115         Cursor const & cur = pi_.base.bv->cursor();
 116         if (cur.selection() && cur.text() == &text_
 117                 && cur.normalAnchor().text() == &text_)
 118                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 119
 120         LASSERT(inset, return);
 121         // Backup full_repaint status because some insets (InsetTabular)
 122         // requires a full repaint
 123         bool const pi_full_repaint = pi_.full_repaint;
 124         bool const pi_do_spellcheck = pi_.do_spellcheck;
 125         Change const pi_change = pi_.change_;
 126
 127         pi_.base.font = inset->inheritFont() ? font.fontInfo() :
 128                 pi_.base.bv->buffer().params().getFont().fontInfo();
 129         pi_.ltr_pos = !font.isVisibleRightToLeft();
 130         pi_.change_ = change_.changed() ? change_ : change;
 131         pi_.do_spellcheck &= inset->allowSpellCheck();
 132
 133         int const x1 = int(x_);
 134         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 135         // insets are painted completely. Recursive
 136         // FIXME: it is wrong to completely paint the background
 137         // if we want to do single row painting.
 138         inset->drawBackground(pi_, x1, yo_);
 139         inset->drawSelection(pi_, x1, yo_);
 140         inset->draw(pi_, x1, yo_);
 141
 142         Dimension const & dim = pm_.insetDimension(inset);
 143
 144         paintForeignMark(x_, font.language(), dim.descent());
 145
 146         x_ += dim.width();
 147
 148         // Restore full_repaint status.
 149         pi_.full_repaint = pi_full_repaint;
 150         pi_.change_ = pi_change;
 151         pi_.do_spellcheck = pi_do_spellcheck;
 152         pi_.selected = pi_selected;
 153
 154 #ifdef DEBUG_METRICS
 155         int const x2 = x1 + dim.wid;
 156         int const y1 = yo_ + dim.des;
 157         int const y2 = yo_ - dim.asc;
 158         pi_.pain.line(x1, y1, x1, y2, Color_green);
 159         pi_.pain.line(x1, y1, x2, y1, Color_green);
 160         pi_.pain.line(x2, y1, x2, y2, Color_green);
 161         pi_.pain.line(x1, y2, x2, y2, Color_green);
 162 #endif
 163 }
 164
 165
 166 void RowPainter::paintSeparator(double width, Font const & font)
 167 {
 168         pi_.pain.textDecoration(font.fontInfo(), int(x_), yo_, int(width));
 169         x_ += width;
 170 }
 171
 172
 173 void RowPainter::paintForeignMark(double orig_x, Language const * lang, int desc) const
 174 {
 175         if (!lyxrc.mark_foreign_language)
 176                 return;
 177         if (lang == latex_language)
 178                 return;
 179         if (lang == pi_.base.bv->buffer().params().language)
 180                 return;
 181
 182         int const y = yo_ + solid_line_offset_ + desc + solid_line_thickness_ / 2;
 183         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language,
 184                 Painter::line_solid, solid_line_thickness_);
 185 }
 186
 187
 188 void RowPainter::paintMisspelledMark(double const orig_x,
 189                                      Row::Element const & e) const
 190 {
 191         // if changed the misspelled marker gets placed slightly lower than normal
 192         // to avoid drawing at the same vertical offset
 193         int const y = yo_ + solid_line_offset_ + solid_line_thickness_
 194                 + (e.change.changed() ? solid_line_thickness_ + 1 : 0)
 195                 + dotted_line_offset_;
 196
 197         //FIXME: this could be computed only once, it is probably not costly.
 198         // check for cursor position
 199         // don't draw misspelled marker for words at cursor position
 200         // we don't want to disturb the process of text editing
 201         DocIterator const nw = pi_.base.bv->cursor().newWord();
 202         pos_type cpos = -1;
 203         if (!nw.empty() && par_.id() == nw.paragraph().id()) {
 204                 cpos = nw.pos();
 205                 if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
 206                         --cpos;
 207                 else if (cpos > 0 && par_.isWordSeparator(cpos))
 208                         --cpos;
 209         }
 210
 211         pos_type pos = e.pos;
 212         while (pos < e.pos + pos_type(e.str.length())) {
 213                 if (!par_.isMisspelled(pos)) {
 214                         ++pos;
 215                         continue;
 216                 }
 217
 218                 FontSpan const & range = par_.getSpellRange(pos);
 219
 220                 // Skip element which are being edited
 221                 if (range.contains(cpos)) {
 222                         // the range includes the last element
 223                         pos = range.last + 1;
 224                         continue;
 225                 }
 226
 227                 FontMetrics const & fm = theFontMetrics(e.font);
 228                 int x1 = fm.pos2x(e.str, range.first - e.pos,
 229                                   e.font.isVisibleRightToLeft(), e.extra);
 230                 int x2 = fm.pos2x(e.str, min(range.last - e.pos + 1,
 231                                                                          pos_type(e.str.length())),
 232                                                                          e.font.isVisibleRightToLeft(), e.extra);
 233                 if (x1 > x2)
 234                         swap(x1, x2);
 235
 236                 pi_.pain.line(int(orig_x) + x1, y, int(orig_x) + x2, y,
 237                               Color_error,
 238                               Painter::line_onoffdash, dotted_line_thickness_);
 239                 pos = range.last + 1;
 240         }
 241 }
 242
 243
 244 void RowPainter::paintStringAndSel(Row::Element const & e)
 245 {
 246         // at least part of text selected?
 247         bool const some_sel = (e.endpos >= row_.sel_beg && e.pos < row_.sel_end)
 248                 || pi_.selected;
 249         // all the text selected?
 250         bool const all_sel = (e.pos >= row_.sel_beg && e.endpos < row_.sel_end)
 251                 || pi_.selected;
 252
 253         if (all_sel) {
 254                 Font copy = e.font;
 255                 copy.fontInfo().setPaintColor(Color_selectiontext);
 256                 pi_.pain.text(int(x_), yo_, e.str, copy, e.extra);
 257         } else if (e.change.changed()) {
 258                 Font copy = e.font;
 259                 copy.fontInfo().setPaintColor(e.change.color());
 260                 pi_.pain.text(int(x_), yo_, e.str, copy, e.extra);
 261         } else if (!some_sel) {
 262                 pi_.pain.text(int(x_), yo_, e.str, e.font, e.extra);
 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, e.extra);
 267         }
 268         x_ += e.full_width();
 269 }
 270
 271
 272 void RowPainter::paintChange(double orig_x, Font const & font,
 273                              Change const & change) const
 274 {
 275         if (!change.changed())
 276                 return;
 277         // Calculate 1/3 height of font
 278         FontMetrics const & fm = theFontMetrics(font);
 279         int const y_bar = change.deleted() ? yo_ - fm.maxAscent() / 3
 280                 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 281         pi_.pain.line(int(orig_x), y_bar, int(x_), y_bar,
 282                       change.color(), Painter::line_solid, solid_line_thickness_);
 283 }
 284
 285
 286 void RowPainter::paintChangeBar() const
 287 {
 288         pos_type const start = row_.pos();
 289         pos_type end = row_.endpos();
 290
 291         if (par_.size() == end) {
 292                 // this is the last row of the paragraph;
 293                 // thus, we must also consider the imaginary end-of-par character
 294                 end++;
 295         }
 296
 297         if (start == end || !par_.isChanged(start, end))
 298                 return;
 299
 300         int const height = text_metrics_.isLastRow(pit_, row_)
 301                 ? row_.ascent()
 302                 : row_.height();
 303
 304         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 305 }
 306
 307
 308 void RowPainter::paintAppendix() const
 309 {
 310         // only draw the appendix frame once (for the main text)
 311         if (!par_.params().appendix() || !text_.isMainText())
 312                 return;
 313
 314         int y = yo_ - row_.ascent();
 315
 316         if (par_.params().startOfAppendix())
 317                 y += 2 * defaultRowHeight();
 318
 319         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 320         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 321 }
 322
 323
 324 void RowPainter::paintDepthBar() const
 325 {
 326         depth_type const depth = par_.getDepth();
 327
 328         if (depth <= 0)
 329                 return;
 330
 331         depth_type prev_depth = 0;
 332         if (!text_metrics_.isFirstRow(pit_, row_)) {
 333                 pit_type pit2 = pit_;
 334                 if (row_.pos() == 0)
 335                         --pit2;
 336                 prev_depth = pars_[pit2].getDepth();
 337         }
 338
 339         depth_type next_depth = 0;
 340         if (!text_metrics_.isLastRow(pit_, row_)) {
 341                 pit_type pit2 = pit_;
 342                 if (row_.endpos() >= pars_[pit2].size())
 343                         ++pit2;
 344                 next_depth = pars_[pit2].getDepth();
 345         }
 346
 347         for (depth_type i = 1; i <= depth; ++i) {
 348                 int const w = nestMargin() / 5;
 349                 int x = int(xo_) + w * i;
 350                 // only consider the changebar space if we're drawing outermost text
 351                 if (text_.isMainText())
 352                         x += changebarMargin();
 353
 354                 int const starty = yo_ - row_.ascent();
 355                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 356
 357                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 358
 359                 if (i > prev_depth)
 360                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 361                 if (i > next_depth)
 362                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 363         }
 364 }
 365
 366
 367 int RowPainter::paintAppendixStart(int y) const
 368 {
 369         FontInfo pb_font = sane_font;
 370         pb_font.setColor(Color_appendix);
 371         pb_font.decSize();
 372
 373         int w = 0;
 374         int a = 0;
 375         int d = 0;
 376
 377         docstring const label = _("Appendix");
 378         theFontMetrics(pb_font).rectText(label, w, a, d);
 379
 380         int const text_start = int(xo_ + (width_ - w) / 2);
 381         int const text_end = text_start + w;
 382
 383         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 384
 385         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 386         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 387
 388         return 3 * defaultRowHeight();
 389 }
 390
 391
 392 void RowPainter::paintTooLargeMarks(bool const left, bool const right) const
 393 {
 394         if (left)
 395                 pi_.pain.line(dotted_line_thickness_, yo_ - row_.ascent(),
 396                                           dotted_line_thickness_, yo_ + row_.descent(),
 397                                           Color_scroll,
 398                                           Painter::line_onoffdash, dotted_line_thickness_);
 399         if (right) {
 400                 int const wwidth = pi_.base.bv->workWidth() - dotted_line_thickness_;
 401                 pi_.pain.line(wwidth, yo_ - row_.ascent(),
 402                                           wwidth, yo_ + row_.descent(),
 403                                           Color_scroll,
 404                                           Painter::line_onoffdash, dotted_line_thickness_);
 405         }
 406 }
 407
 408
 409 void RowPainter::paintFirst() const
 410 {
 411         BufferParams const & bparams = pi_.base.bv->buffer().params();
 412         Layout const & layout = par_.layout();
 413
 414         int y_top = 0;
 415
 416         // start of appendix?
 417         if (par_.params().startOfAppendix())
 418                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 419
 420         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 421                 && pit_ != 0) {
 422                 if (layout.latextype == LATEX_PARAGRAPH
 423                     && !par_.getDepth()) {
 424                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 425                 } else {
 426                         Layout const & playout = pars_[pit_ - 1].layout();
 427                         if (playout.latextype == LATEX_PARAGRAPH
 428                             && !pars_[pit_ - 1].getDepth()) {
 429                                 // is it right to use defskip here, too? (AS)
 430                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 431                         }
 432                 }
 433         }
 434
 435         bool const is_first =
 436                 text_.isFirstInSequence(pit_) || !layout.isParagraphGroup();
 437         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 438
 439         if (layout.labelIsInline()
 440                         && (layout.labeltype != LABEL_STATIC || is_first)) {
 441                 paintLabel();
 442         } else if (is_first && layout.labelIsAbove()) {
 443                 paintTopLevelLabel();
 444         }
 445 }
 446
 447
 448 void RowPainter::paintLabel() const
 449 {
 450         docstring const str = par_.labelString();
 451         if (str.empty())
 452                 return;
 453
 454         bool const is_rtl = text_.isRTL(par_);
 455         Layout const & layout = par_.layout();
 456         FontInfo const font = labelFont();
 457         FontMetrics const & fm = theFontMetrics(font);
 458         double x = x_;
 459
 460         if (is_rtl)
 461                 x = width_ - row_.right_margin + fm.width(layout.labelsep);
 462         else
 463                 x = x_ - fm.width(layout.labelsep) - fm.width(str);
 464
 465         pi_.pain.text(int(x), yo_, str, font);
 466 }
 467
 468
 469 void RowPainter::paintTopLevelLabel() const
 470 {
 471         BufferParams const & bparams = pi_.base.bv->buffer().params();
 472         bool const is_rtl = text_.isRTL(par_);
 473         ParagraphParameters const & pparams = par_.params();
 474         Layout const & layout = par_.layout();
 475         FontInfo const font = labelFont();
 476         docstring const str = par_.labelString();
 477         if (str.empty())
 478                 return;
 479
 480         double spacing_val = 1.0;
 481         if (!pparams.spacing().isDefault())
 482                 spacing_val = pparams.spacing().getValue();
 483         else
 484                 spacing_val = bparams.spacing().getValue();
 485
 486         FontMetrics const & fm = theFontMetrics(font);
 487
 488         int const labeladdon = int(fm.maxHeight()
 489                 * layout.spacing.getValue() * spacing_val);
 490
 491         int maxdesc =
 492                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 493                 + (layout.labelbottomsep * defaultRowHeight()));
 494
 495         double x = x_;
 496         if (layout.labeltype == LABEL_CENTERED) {
 497                 x = row_.left_margin + (width_ - row_.left_margin - row_.right_margin) / 2;
 498                 x -= fm.width(str) / 2;
 499         } else if (is_rtl) {
 500                 x = width_ - row_.right_margin - fm.width(str);
 501         }
 502         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 503 }
 504
 505
 506 /** Check if the current paragraph is the last paragraph in a
 507     proof environment */
 508 static int getEndLabel(pit_type p, Text const & text)
 509 {
 510         ParagraphList const & pars = text.paragraphs();
 511         pit_type pit = p;
 512         depth_type par_depth = pars[p].getDepth();
 513         while (pit != pit_type(pars.size())) {
 514                 Layout const & layout = pars[pit].layout();
 515                 int const endlabeltype = layout.endlabeltype;
 516
 517                 if (endlabeltype != END_LABEL_NO_LABEL) {
 518                         if (p + 1 == pit_type(pars.size()))
 519                                 return endlabeltype;
 520
 521                         depth_type const next_depth =
 522                                 pars[p + 1].getDepth();
 523                         if (par_depth > next_depth ||
 524                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 525                                 return endlabeltype;
 526                         break;
 527                 }
 528                 if (par_depth == 0)
 529                         break;
 530                 pit = text.outerHook(pit);
 531                 if (pit != pit_type(pars.size()))
 532                         par_depth = pars[pit].getDepth();
 533         }
 534         return END_LABEL_NO_LABEL;
 535 }
 536
 537
 538 void RowPainter::paintLast()
 539 {
 540         bool const is_rtl = text_.isRTL(par_);
 541         int const endlabel = getEndLabel(pit_, text_);
 542
 543         // paint imaginary end-of-paragraph character
 544
 545         Change const & change = par_.lookupChange(par_.size());
 546         if (change.changed()) {
 547                 FontMetrics const & fm =
 548                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 549                 int const length = fm.maxAscent() / 2;
 550                 Color col = change.color();
 551
 552                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 553                            Painter::line_solid, 3);
 554
 555                 if (change.deleted()) {
 556                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 557                                 yo_ + 2, col, Painter::line_solid, 3);
 558                 } else {
 559                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 560                                 yo_ + 2, col, Painter::line_solid, 3);
 561                 }
 562         }
 563
 564         // draw an endlabel
 565
 566         switch (endlabel) {
 567         case END_LABEL_BOX:
 568         case END_LABEL_FILLED_BOX: {
 569                 FontInfo const font = labelFont();
 570                 FontMetrics const & fm = theFontMetrics(font);
 571                 int const size = int(0.75 * fm.maxAscent());
 572                 int const y = yo_ - size;
 573                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 574                 int x = is_rtl ? nestMargin() + changebarMargin()
 575                         : max_row_width - row_.right_margin;
 576
 577                 // If needed, move the box a bit to avoid overlapping with text.
 578                 int const rem = max_row_width - row_.width();
 579                 if (rem <= 0)
 580                         x += is_rtl ? rem : - rem;
 581
 582                 if (endlabel == END_LABEL_BOX)
 583                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 584                 else
 585                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 586                 break;
 587         }
 588
 589         case END_LABEL_STATIC: {
 590                 FontInfo const font = labelFont();
 591                 FontMetrics const & fm = theFontMetrics(font);
 592                 docstring const & str = par_.layout().endlabelstring();
 593                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 594                 pi_.pain.text(int(x), yo_, str, font);
 595                 break;
 596         }
 597
 598         case END_LABEL_NO_LABEL:
 599                 break;
 600         }
 601 }
 602
 603
 604 void RowPainter::paintOnlyInsets()
 605 {
 606         Row::const_iterator cit = row_.begin();
 607         Row::const_iterator const & end = row_.end();
 608         for ( ; cit != end ; ++cit) {
 609                 Row::Element const & e = *cit;
 610                 if (e.type == Row::INSET) {
 611                         // If outer row has changed, nested insets are repainted completely.
 612                         pi_.base.bv->coordCache().insets().add(e.inset, int(x_), yo_);
 613                         bool const nested_inset =
 614                                 (e.inset->asInsetMath() && !e.inset->asInsetMath()->asMacroTemplate())
 615                                 || e.inset->asInsetText() || e.inset->asInsetTabular();
 616                         if (!nested_inset) {
 617                                 x_ += e.full_width();
 618                                 continue;
 619                         }
 620                         paintInset(e.inset, e.font, e.change, e.pos);
 621                 } else
 622                         x_ += e.full_width();
 623         }
 624 }
 625
 626
 627 void RowPainter::paintText()
 628 {
 629         Row::const_iterator cit = row_.begin();
 630         Row::const_iterator const & end = row_.end();
 631         for ( ; cit != end ; ++cit) {
 632                 double const orig_x = x_;
 633                 Row::Element const & e = *cit;
 634                 int foreign_descent = 0;
 635
 636                 switch (e.type) {
 637                 case Row::STRING:
 638                 case Row::VIRTUAL:
 639                         paintStringAndSel(e);
 640
 641                         // Paint the spelling mark if needed.
 642                         if (lyxrc.spellcheck_continuously && pi_.do_spellcheck
 643                                 && par_.isMisspelled(e.pos)) {
 644                                 paintMisspelledMark(orig_x, e);
 645                         }
 646                         break;
 647                 case Row::INSET: {
 648                         // If outer row has changed, nested insets are repaint completely.
 649                         pi_.base.bv->coordCache().insets().add(e.inset, int(x_), yo_);
 650                         paintInset(e.inset, e.font, e.change, e.pos);
 651                         foreign_descent = e.dim.descent();
 652                 }
 653                         break;
 654                 case Row::SEPARATOR:
 655                 case Row::SPACE:
 656                         paintSeparator(e.full_width(), e.font);
 657                 }
 658
 659                 // The line that indicates word in a different language
 660                 paintForeignMark(orig_x, e.font.language(), foreign_descent);
 661
 662                 // change tracking (not for insets that track their own changes)
 663                 if (e.type != Row::INSET || ! e.inset->canTrackChanges())
 664                         paintChange(orig_x, e.font, e.change);
 665         }
 666 }
 667
 668
 669 void RowPainter::paintSelection() const
 670 {
 671         if (!row_.selection())
 672                 return;
 673         Cursor const & curs = pi_.base.bv->cursor();
 674         DocIterator beg = curs.selectionBegin();
 675         beg.pit() = pit_;
 676         beg.pos() = row_.sel_beg;
 677
 678         DocIterator end = curs.selectionEnd();
 679         end.pit() = pit_;
 680         end.pos() = row_.sel_end;
 681
 682         bool const begin_boundary = beg.pos() >= row_.endpos();
 683         bool const end_boundary = row_.sel_end == row_.endpos();
 684
 685         DocIterator cur = beg;
 686         cur.boundary(begin_boundary);
 687         int x1 = text_metrics_.cursorX(beg.top(), begin_boundary);
 688         int x2 = text_metrics_.cursorX(end.top(), end_boundary);
 689         int const y1 = yo_ - row_.ascent();
 690         int const y2 = y1 + row_.height();
 691
 692         int const rm = text_.isMainText() ? pi_.base.bv->rightMargin() : 0;
 693         int const lm = text_.isMainText() ? pi_.base.bv->leftMargin() : 0;
 694
 695         // draw the margins
 696         if (row_.begin_margin_sel) {
 697                 if (text_.isRTL(beg.paragraph())) {
 698                         pi_.pain.fillRectangle(int(xo_ + x1), y1,
 699                                 text_metrics_.width() - rm - x1, y2 - y1, Color_selection);
 700                 } else {
 701                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x1 - lm, y2 - y1,
 702                                 Color_selection);
 703                 }
 704         }
 705
 706         if (row_.end_margin_sel) {
 707                 if (text_.isRTL(beg.paragraph())) {
 708                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x2 - lm, y2 - y1,
 709                                 Color_selection);
 710                 } else {
 711                         pi_.pain.fillRectangle(int(xo_ + x2), y1, text_metrics_.width() - rm - x2,
 712                                 y2 - y1, Color_selection);
 713                 }
 714         }
 715
 716         // if we are on a boundary from the beginning, it's probably
 717         // a RTL boundary and we jump to the other side directly as this
 718         // segement is 0-size and confuses the logic below
 719         if (cur.boundary())
 720                 cur.boundary(false);
 721
 722         // go through row and draw from RTL boundary to RTL boundary
 723         while (cur < end) {
 724                 bool draw_now = false;
 725
 726                 // simplified cursorForward code below which does not
 727                 // descend into insets and which does not go into the
 728                 // next line. Compare the logic with the original cursorForward
 729
 730                 // if left of boundary -> just jump to right side, but
 731                 // for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
 732                 if (cur.boundary()) {
 733                         cur.boundary(false);
 734                 }       else if (text_metrics_.isRTLBoundary(cur.pit(), cur.pos() + 1)) {
 735                         // in front of RTL boundary -> Stay on this side of the boundary
 736                         // because:  ab|cDDEEFFghi -> abc|DDEEFFghi
 737                         ++cur.pos();
 738                         cur.boundary(true);
 739                         draw_now = true;
 740                 } else {
 741                         // move right
 742                         ++cur.pos();
 743
 744                         // line end?
 745                         if (cur.pos() == row_.endpos())
 746                                 cur.boundary(true);
 747                 }
 748
 749                 if (x1 == -1) {
 750                         // the previous segment was just drawn, now the next starts
 751                         x1 = text_metrics_.cursorX(cur.top(), cur.boundary());
 752                 }
 753
 754                 if (!(cur < end) || draw_now) {
 755                         x2 = text_metrics_.cursorX(cur.top(), cur.boundary());
 756                         pi_.pain.fillRectangle(int(xo_ + min(x1, x2)), y1, abs(x2 - x1),
 757                                 y2 - y1, Color_selection);
 758
 759                         // reset x1, so it is set again next round (which will be on the
 760                         // right side of a boundary or at the selection end)
 761                         x1 = -1;
 762                 }
 763         }
 764 }
 765
 766
 767 } // namespace lyx