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                                      docstring const & str, Font const & font,
 190                                      pos_type const start_pos,
 191                                      bool const changed) const
 192 {
 193         // if changed the misspelled marker gets placed slightly lower than normal
 194         // to avoid drawing at the same vertical offset
 195         int const y = yo_ + solid_line_offset_ + solid_line_thickness_
 196                 + (changed ? solid_line_thickness_ + 1 : 0)
 197                 + dotted_line_offset_;
 198
 199         //FIXME: this could be computed only once, it is probably not costly.
 200         // check for cursor position
 201         // don't draw misspelled marker for words at cursor position
 202         // we don't want to disturb the process of text editing
 203         DocIterator const nw = pi_.base.bv->cursor().newWord();
 204         pos_type cpos = -1;
 205         if (!nw.empty() && par_.id() == nw.paragraph().id()) {
 206                 cpos = nw.pos();
 207                 if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
 208                         --cpos;
 209                 else if (cpos > 0 && par_.isWordSeparator(cpos))
 210                         --cpos;
 211         }
 212
 213         pos_type pos = start_pos;
 214         while (pos < start_pos + pos_type(str.length())) {
 215                 if (!par_.isMisspelled(pos)) {
 216                         ++pos;
 217                         continue;
 218                 }
 219
 220                 FontSpan const & range = par_.getSpellRange(pos);
 221
 222                 // Skip element which are being edited
 223                 if (range.contains(cpos)) {
 224                         // the range includes the last element
 225                         pos = range.last + 1;
 226                         continue;
 227                 }
 228
 229                 FontMetrics const & fm = theFontMetrics(font);
 230                 int x1 = fm.pos2x(str, range.first - start_pos,
 231                                   font.isVisibleRightToLeft());
 232                 int x2 = fm.pos2x(str, min(range.last - start_pos + 1,
 233                                            pos_type(str.length())),
 234                                   font.isVisibleRightToLeft());
 235                 if (x1 > x2)
 236                         swap(x1, x2);
 237
 238                 pi_.pain.line(int(orig_x) + x1, y, int(orig_x) + x2, y,
 239                               Color_error,
 240                               Painter::line_onoffdash, dotted_line_thickness_);
 241                 pos = range.last + 1;
 242         }
 243 }
 244
 245
 246 void RowPainter::paintStringAndSel(docstring const & str, Font const & font,
 247                                  Change const & change,
 248                                  pos_type start_pos, pos_type end_pos)
 249 {
 250         // at least part of text selected?
 251         bool const some_sel = (end_pos >= row_.sel_beg && start_pos < row_.sel_end)
 252                 || pi_.selected;
 253         // all the text selected?
 254         bool const all_sel = (start_pos >= row_.sel_beg && end_pos < row_.sel_end)
 255                 || pi_.selected;
 256
 257         if (all_sel) {
 258                 Font copy = font;
 259                 copy.fontInfo().setPaintColor(Color_selectiontext);
 260                 x_ += pi_.pain.text(int(x_), yo_, str, copy);
 261         } else if (change.changed()) {
 262                 Font copy = font;
 263                 copy.fontInfo().setPaintColor(change.color());
 264                 x_ += pi_.pain.text(int(x_), yo_, str, copy);
 265         } else if (!some_sel) {
 266                 x_ += pi_.pain.text(int(x_), yo_, str, font);
 267         } else {
 268                 x_ += pi_.pain.text(int(x_), yo_, str, font, Color_selectiontext,
 269                                     max(row_.sel_beg, start_pos) - start_pos,
 270                                     min(row_.sel_end, end_pos) - start_pos);
 271         }
 272 }
 273
 274
 275 void RowPainter::paintChange(double orig_x, Font const & font,
 276                              Change const & change) const
 277 {
 278         if (!change.changed())
 279                 return;
 280         // Calculate 1/3 height of font
 281         FontMetrics const & fm = theFontMetrics(font);
 282         int const y_bar = change.deleted() ? yo_ - fm.maxAscent() / 3
 283                 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 284         pi_.pain.line(int(orig_x), y_bar, int(x_), y_bar,
 285                       change.color(), Painter::line_solid, solid_line_thickness_);
 286 }
 287
 288
 289 void RowPainter::paintChangeBar() const
 290 {
 291         pos_type const start = row_.pos();
 292         pos_type end = row_.endpos();
 293
 294         if (par_.size() == end) {
 295                 // this is the last row of the paragraph;
 296                 // thus, we must also consider the imaginary end-of-par character
 297                 end++;
 298         }
 299
 300         if (start == end || !par_.isChanged(start, end))
 301                 return;
 302
 303         int const height = text_metrics_.isLastRow(pit_, row_)
 304                 ? row_.ascent()
 305                 : row_.height();
 306
 307         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 308 }
 309
 310
 311 void RowPainter::paintAppendix() const
 312 {
 313         // only draw the appendix frame once (for the main text)
 314         if (!par_.params().appendix() || !text_.isMainText())
 315                 return;
 316
 317         int y = yo_ - row_.ascent();
 318
 319         if (par_.params().startOfAppendix())
 320                 y += 2 * defaultRowHeight();
 321
 322         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 323         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 324 }
 325
 326
 327 void RowPainter::paintDepthBar() const
 328 {
 329         depth_type const depth = par_.getDepth();
 330
 331         if (depth <= 0)
 332                 return;
 333
 334         depth_type prev_depth = 0;
 335         if (!text_metrics_.isFirstRow(pit_, row_)) {
 336                 pit_type pit2 = pit_;
 337                 if (row_.pos() == 0)
 338                         --pit2;
 339                 prev_depth = pars_[pit2].getDepth();
 340         }
 341
 342         depth_type next_depth = 0;
 343         if (!text_metrics_.isLastRow(pit_, row_)) {
 344                 pit_type pit2 = pit_;
 345                 if (row_.endpos() >= pars_[pit2].size())
 346                         ++pit2;
 347                 next_depth = pars_[pit2].getDepth();
 348         }
 349
 350         for (depth_type i = 1; i <= depth; ++i) {
 351                 int const w = nestMargin() / 5;
 352                 int x = int(xo_) + w * i;
 353                 // only consider the changebar space if we're drawing outermost text
 354                 if (text_.isMainText())
 355                         x += changebarMargin();
 356
 357                 int const starty = yo_ - row_.ascent();
 358                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 359
 360                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 361
 362                 if (i > prev_depth)
 363                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 364                 if (i > next_depth)
 365                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 366         }
 367 }
 368
 369
 370 int RowPainter::paintAppendixStart(int y) const
 371 {
 372         FontInfo pb_font = sane_font;
 373         pb_font.setColor(Color_appendix);
 374         pb_font.decSize();
 375
 376         int w = 0;
 377         int a = 0;
 378         int d = 0;
 379
 380         docstring const label = _("Appendix");
 381         theFontMetrics(pb_font).rectText(label, w, a, d);
 382
 383         int const text_start = int(xo_ + (width_ - w) / 2);
 384         int const text_end = text_start + w;
 385
 386         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 387
 388         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 389         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 390
 391         return 3 * defaultRowHeight();
 392 }
 393
 394
 395 void RowPainter::paintTooLargeMarks(bool const left, bool const right) const
 396 {
 397         if (left)
 398                 pi_.pain.line(dotted_line_thickness_, yo_ - row_.ascent(),
 399                                           dotted_line_thickness_, yo_ + row_.descent(),
 400                                           Color_scroll,
 401                                           Painter::line_onoffdash, dotted_line_thickness_);
 402         if (right) {
 403                 int const wwidth = pi_.base.bv->workWidth() - dotted_line_thickness_;
 404                 pi_.pain.line(wwidth, yo_ - row_.ascent(),
 405                                           wwidth, yo_ + row_.descent(),
 406                                           Color_scroll,
 407                                           Painter::line_onoffdash, dotted_line_thickness_);
 408         }
 409 }
 410
 411
 412 void RowPainter::paintFirst() const
 413 {
 414         BufferParams const & bparams = pi_.base.bv->buffer().params();
 415         Layout const & layout = par_.layout();
 416
 417         int y_top = 0;
 418
 419         // start of appendix?
 420         if (par_.params().startOfAppendix())
 421                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 422
 423         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 424                 && pit_ != 0) {
 425                 if (layout.latextype == LATEX_PARAGRAPH
 426                     && !par_.getDepth()) {
 427                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 428                 } else {
 429                         Layout const & playout = pars_[pit_ - 1].layout();
 430                         if (playout.latextype == LATEX_PARAGRAPH
 431                             && !pars_[pit_ - 1].getDepth()) {
 432                                 // is it right to use defskip here, too? (AS)
 433                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 434                         }
 435                 }
 436         }
 437
 438         bool const is_first =
 439                 text_.isFirstInSequence(pit_) || !layout.isParagraphGroup();
 440         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 441
 442         if (layout.labelIsInline()
 443                         && (layout.labeltype != LABEL_STATIC || is_first)) {
 444                 paintLabel();
 445         } else if (is_first && layout.labelIsAbove()) {
 446                 paintTopLevelLabel();
 447         }
 448 }
 449
 450
 451 void RowPainter::paintLabel() const
 452 {
 453         docstring const str = par_.labelString();
 454         if (str.empty())
 455                 return;
 456
 457         bool const is_rtl = text_.isRTL(par_);
 458         Layout const & layout = par_.layout();
 459         FontInfo const font = labelFont();
 460         FontMetrics const & fm = theFontMetrics(font);
 461         double x = x_;
 462
 463         if (is_rtl)
 464                 x = width_ - row_.right_margin + fm.width(layout.labelsep);
 465         else
 466                 x = x_ - fm.width(layout.labelsep) - fm.width(str);
 467
 468         pi_.pain.text(int(x), yo_, str, font);
 469 }
 470
 471
 472 void RowPainter::paintTopLevelLabel() const
 473 {
 474         BufferParams const & bparams = pi_.base.bv->buffer().params();
 475         bool const is_rtl = text_.isRTL(par_);
 476         ParagraphParameters const & pparams = par_.params();
 477         Layout const & layout = par_.layout();
 478         FontInfo const font = labelFont();
 479         docstring const str = par_.labelString();
 480         if (str.empty())
 481                 return;
 482
 483         double spacing_val = 1.0;
 484         if (!pparams.spacing().isDefault())
 485                 spacing_val = pparams.spacing().getValue();
 486         else
 487                 spacing_val = bparams.spacing().getValue();
 488
 489         FontMetrics const & fm = theFontMetrics(font);
 490
 491         int const labeladdon = int(fm.maxHeight()
 492                 * layout.spacing.getValue() * spacing_val);
 493
 494         int maxdesc =
 495                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 496                 + (layout.labelbottomsep * defaultRowHeight()));
 497
 498         double x = x_;
 499         if (layout.labeltype == LABEL_CENTERED) {
 500                 x = row_.left_margin + (width_ - row_.left_margin - row_.right_margin) / 2;
 501                 x -= fm.width(str) / 2;
 502         } else if (is_rtl) {
 503                 x = width_ - row_.right_margin - fm.width(str);
 504         }
 505         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 506 }
 507
 508
 509 /** Check if the current paragraph is the last paragraph in a
 510     proof environment */
 511 static int getEndLabel(pit_type p, Text const & text)
 512 {
 513         ParagraphList const & pars = text.paragraphs();
 514         pit_type pit = p;
 515         depth_type par_depth = pars[p].getDepth();
 516         while (pit != pit_type(pars.size())) {
 517                 Layout const & layout = pars[pit].layout();
 518                 int const endlabeltype = layout.endlabeltype;
 519
 520                 if (endlabeltype != END_LABEL_NO_LABEL) {
 521                         if (p + 1 == pit_type(pars.size()))
 522                                 return endlabeltype;
 523
 524                         depth_type const next_depth =
 525                                 pars[p + 1].getDepth();
 526                         if (par_depth > next_depth ||
 527                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 528                                 return endlabeltype;
 529                         break;
 530                 }
 531                 if (par_depth == 0)
 532                         break;
 533                 pit = text.outerHook(pit);
 534                 if (pit != pit_type(pars.size()))
 535                         par_depth = pars[pit].getDepth();
 536         }
 537         return END_LABEL_NO_LABEL;
 538 }
 539
 540
 541 void RowPainter::paintLast()
 542 {
 543         bool const is_rtl = text_.isRTL(par_);
 544         int const endlabel = getEndLabel(pit_, text_);
 545
 546         // paint imaginary end-of-paragraph character
 547
 548         Change const & change = par_.lookupChange(par_.size());
 549         if (change.changed()) {
 550                 FontMetrics const & fm =
 551                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 552                 int const length = fm.maxAscent() / 2;
 553                 Color col = change.color();
 554
 555                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 556                            Painter::line_solid, 3);
 557
 558                 if (change.deleted()) {
 559                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 560                                 yo_ + 2, col, Painter::line_solid, 3);
 561                 } else {
 562                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 563                                 yo_ + 2, col, Painter::line_solid, 3);
 564                 }
 565         }
 566
 567         // draw an endlabel
 568
 569         switch (endlabel) {
 570         case END_LABEL_BOX:
 571         case END_LABEL_FILLED_BOX: {
 572                 FontInfo const font = labelFont();
 573                 FontMetrics const & fm = theFontMetrics(font);
 574                 int const size = int(0.75 * fm.maxAscent());
 575                 int const y = yo_ - size;
 576                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 577                 int x = is_rtl ? nestMargin() + changebarMargin()
 578                         : max_row_width - row_.right_margin;
 579
 580                 // If needed, move the box a bit to avoid overlapping with text.
 581                 int const rem = max_row_width - row_.width();
 582                 if (rem <= 0)
 583                         x += is_rtl ? rem : - rem;
 584
 585                 if (endlabel == END_LABEL_BOX)
 586                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 587                 else
 588                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 589                 break;
 590         }
 591
 592         case END_LABEL_STATIC: {
 593                 FontInfo const font = labelFont();
 594                 FontMetrics const & fm = theFontMetrics(font);
 595                 docstring const & str = par_.layout().endlabelstring();
 596                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 597                 pi_.pain.text(int(x), yo_, str, font);
 598                 break;
 599         }
 600
 601         case END_LABEL_NO_LABEL:
 602                 break;
 603         }
 604 }
 605
 606
 607 void RowPainter::paintOnlyInsets()
 608 {
 609         CoordCache const & cache = pi_.base.bv->coordCache();
 610         pos_type const end = row_.endpos();
 611         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 612                 // If outer row has changed, nested insets are repaint completely.
 613                 Inset const * inset = par_.getInset(pos);
 614                 bool const nested_inset = inset &&
 615                                 ((inset->asInsetMath() &&
 616                                   !inset->asInsetMath()->asMacroTemplate())
 617                                  || inset->asInsetText()
 618                                  || inset->asInsetTabular());
 619                 if (!nested_inset)
 620                         continue;
 621                 if (x_ > pi_.base.bv->workWidth()
 622                     || !cache.getInsets().has(inset))
 623                         continue;
 624                 x_ = cache.getInsets().x(inset);
 625                 Font const font = text_metrics_.displayFont(pit_, pos);
 626                 paintInset(inset, font, par_.lookupChange(pos), pos);
 627         }
 628 }
 629
 630 void RowPainter::paintText()
 631 {
 632         Row::const_iterator cit = row_.begin();
 633         Row::const_iterator const & end = row_.end();
 634         for ( ; cit != end ; ++cit) {
 635                 double const orig_x = x_;
 636                 Row::Element const & e = *cit;
 637                 int foreign_descent = 0;
 638
 639                 switch (e.type) {
 640                 case Row::STRING:
 641                 case Row::VIRTUAL:
 642                         paintStringAndSel(e.str, e.font, e.change, e.pos, e.endpos);
 643
 644                         // Paint the spelling mark if needed.
 645                         if (lyxrc.spellcheck_continuously && pi_.do_spellcheck
 646                                 && par_.isMisspelled(e.pos)) {
 647                                 paintMisspelledMark(orig_x, e.str, e.font, e.pos, e.change.changed());
 648                         }
 649                         break;
 650                 case Row::INSET: {
 651                         // If outer row has changed, nested insets are repaint completely.
 652                         pi_.base.bv->coordCache().insets().add(e.inset, int(x_), yo_);
 653                         paintInset(e.inset, e.font, e.change, e.pos);
 654                         foreign_descent = e.dim.descent();
 655                 }
 656                         break;
 657                 case Row::SEPARATOR:
 658                 case Row::SPACE:
 659                         paintSeparator(e.full_width(), e.font);
 660                 }
 661
 662                 // The line that indicates word in a different language
 663                 paintForeignMark(orig_x, e.font.language(), foreign_descent);
 664
 665                 // change tracking (not for insets that track their own changes)
 666                 if (e.type != Row::INSET || ! e.inset->canTrackChanges())
 667                         paintChange(orig_x, e.font, e.change);
 668         }
 669 }
 670
 671
 672 void RowPainter::paintSelection() const
 673 {
 674         if (!row_.selection())
 675                 return;
 676         Cursor const & curs = pi_.base.bv->cursor();
 677         DocIterator beg = curs.selectionBegin();
 678         beg.pit() = pit_;
 679         beg.pos() = row_.sel_beg;
 680
 681         DocIterator end = curs.selectionEnd();
 682         end.pit() = pit_;
 683         end.pos() = row_.sel_end;
 684
 685         bool const begin_boundary = beg.pos() >= row_.endpos();
 686         bool const end_boundary = row_.sel_end == row_.endpos();
 687
 688         DocIterator cur = beg;
 689         cur.boundary(begin_boundary);
 690         int x1 = text_metrics_.cursorX(beg.top(), begin_boundary);
 691         int x2 = text_metrics_.cursorX(end.top(), end_boundary);
 692         int const y1 = yo_ - row_.ascent();
 693         int const y2 = y1 + row_.height();
 694
 695         int const rm = text_.isMainText() ? pi_.base.bv->rightMargin() : 0;
 696         int const lm = text_.isMainText() ? pi_.base.bv->leftMargin() : 0;
 697
 698         // draw the margins
 699         if (row_.begin_margin_sel) {
 700                 if (text_.isRTL(beg.paragraph())) {
 701                         pi_.pain.fillRectangle(int(xo_ + x1), y1,
 702                                 text_metrics_.width() - rm - x1, y2 - y1, Color_selection);
 703                 } else {
 704                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x1 - lm, y2 - y1,
 705                                 Color_selection);
 706                 }
 707         }
 708
 709         if (row_.end_margin_sel) {
 710                 if (text_.isRTL(beg.paragraph())) {
 711                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x2 - lm, y2 - y1,
 712                                 Color_selection);
 713                 } else {
 714                         pi_.pain.fillRectangle(int(xo_ + x2), y1, text_metrics_.width() - rm - x2,
 715                                 y2 - y1, Color_selection);
 716                 }
 717         }
 718
 719         // if we are on a boundary from the beginning, it's probably
 720         // a RTL boundary and we jump to the other side directly as this
 721         // segement is 0-size and confuses the logic below
 722         if (cur.boundary())
 723                 cur.boundary(false);
 724
 725         // go through row and draw from RTL boundary to RTL boundary
 726         while (cur < end) {
 727                 bool draw_now = false;
 728
 729                 // simplified cursorForward code below which does not
 730                 // descend into insets and which does not go into the
 731                 // next line. Compare the logic with the original cursorForward
 732
 733                 // if left of boundary -> just jump to right side, but
 734                 // for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
 735                 if (cur.boundary()) {
 736                         cur.boundary(false);
 737                 }       else if (text_metrics_.isRTLBoundary(cur.pit(), cur.pos() + 1)) {
 738                         // in front of RTL boundary -> Stay on this side of the boundary
 739                         // because:  ab|cDDEEFFghi -> abc|DDEEFFghi
 740                         ++cur.pos();
 741                         cur.boundary(true);
 742                         draw_now = true;
 743                 } else {
 744                         // move right
 745                         ++cur.pos();
 746
 747                         // line end?
 748                         if (cur.pos() == row_.endpos())
 749                                 cur.boundary(true);
 750                 }
 751
 752                 if (x1 == -1) {
 753                         // the previous segment was just drawn, now the next starts
 754                         x1 = text_metrics_.cursorX(cur.top(), cur.boundary());
 755                 }
 756
 757                 if (!(cur < end) || draw_now) {
 758                         x2 = text_metrics_.cursorX(cur.top(), cur.boundary());
 759                         pi_.pain.fillRectangle(int(xo_ + min(x1, x2)), y1, abs(x2 - x1),
 760                                 y2 - y1, Color_selection);
 761
 762                         // reset x1, so it is set again next round (which will be on the
 763                         // right side of a boundary or at the selection end)
 764                         x1 = -1;
 765                 }
 766         }
 767 }
 768
 769
 770 } // namespace lyx