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 "Bidi.h"
  18 #include "Buffer.h"
  19 #include "CoordCache.h"
  20 #include "Cursor.h"
  21 #include "BufferParams.h"
  22 #include "BufferView.h"
  23 #include "Changes.h"
  24 #include "Encoding.h"
  25 #include "support/gettext.h"
  26 #include "Language.h"
  27 #include "Layout.h"
  28 #include "LyXRC.h"
  29 #include "Row.h"
  30 #include "MetricsInfo.h"
  31 #include "Paragraph.h"
  32 #include "ParagraphMetrics.h"
  33 #include "paragraph_funcs.h"
  34 #include "ParagraphParameters.h"
  35 #include "TextMetrics.h"
  36 #include "VSpace.h"
  37
  38 #include "frontends/FontMetrics.h"
  39 #include "frontends/Painter.h"
  40
  41 #include "insets/InsetText.h"
  42
  43 #include "support/debug.h"
  44 #include "support/textutils.h"
  45
  46 #include "support/lassert.h"
  47 #include <boost/crc.hpp>
  48
  49 using namespace std;
  50
  51 namespace lyx {
  52
  53 using frontend::Painter;
  54 using frontend::FontMetrics;
  55
  56 RowPainter::RowPainter(PainterInfo & pi,
  57         Text const & text, pit_type pit, Row const & row, Bidi & bidi, 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)),
  63           bidi_(bidi), erased_(pi_.erased_),
  64           xo_(x), yo_(y), width_(text_metrics_.width())
  65 {
  66         bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
  67         x_ = row_.x + xo_;
  68
  69         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  70         //row_.dump();
  71
  72         LASSERT(pit >= 0, /**/);
  73         LASSERT(pit < int(text.paragraphs().size()), /**/);
  74 }
  75
  76
  77 FontInfo RowPainter::labelFont() const
  78 {
  79         return text_.labelFont(pi_.base.bv->buffer(), par_);
  80 }
  81
  82
  83 int RowPainter::leftMargin() const
  84 {
  85         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
  86                 row_.pos());
  87 }
  88
  89 // If you want to debug inset metrics uncomment the following line:
  90 //#define DEBUG_METRICS
  91 // This draws green lines around each inset.
  92
  93
  94 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
  95 {
  96         Font const font = text_metrics_.displayFont(pit_, pos);
  97
  98         LASSERT(inset, /**/);
  99         // Backup full_repaint status because some insets (InsetTabular)
 100         // requires a full repaint
 101         bool pi_full_repaint = pi_.full_repaint;
 102
 103         // FIXME: We should always use font, see documentation of
 104         // noFontChange() in Inset.h.
 105         pi_.base.font = inset->noFontChange() ?
 106                 pi_.base.bv->buffer().params().getFont().fontInfo() :
 107                 font.fontInfo();
 108         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 109         pi_.erased_ = erased_ || par_.isDeleted(pos);
 110         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 111         // insets are painted completely. Recursive
 112         inset->drawSelection(pi_, int(x_), yo_);
 113         inset->draw(pi_, int(x_), yo_);
 114
 115         Dimension const & dim = pm_.insetDimension(inset);
 116
 117         paintForeignMark(x_, font.language(), dim.descent());
 118
 119         x_ += dim.width();
 120
 121         // Restore full_repaint status.
 122         pi_.full_repaint = pi_full_repaint;
 123
 124 #ifdef DEBUG_METRICS
 125         int const x1 = int(x_ - dim.width());
 126         Dimension dim2;
 127         LASSERT(max_witdh_ > 0, /**/);
 128         int right_margin = text_metrics_.rightMargin(pm_);
 129         int const w = max_witdh_ - leftMargin() - right_margin;
 130         MetricsInfo mi(pi_.base.bv, font.fontInfo(), w);
 131         inset->metrics(mi, dim2);
 132         if (dim.wid != dim2.wid)
 133                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 134                        << " draw width " << dim.width()
 135                        << "> metrics width " << dim2.wid << "." << endl;
 136         if (dim->asc != dim2.asc)
 137                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 138                        << " draw ascent " << dim.ascent()
 139                        << "> metrics ascent " << dim2.asc << "." << endl;
 140         if (dim2.descent() != dim.des)
 141                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 142                        << " draw ascent " << dim.descent()
 143                        << "> metrics descent " << dim2.des << "." << endl;
 144         LASSERT(dim2.wid == dim.wid, /**/);
 145         LASSERT(dim2.asc == dim.asc, /**/);
 146         LASSERT(dim2.des == dim.des, /**/);
 147         int const x2 = x1 + dim.wid;
 148         int const y1 = yo_ + dim.des;
 149         int const y2 = yo_ - dim.asc;
 150         pi_.pain.line(x1, y1, x1, y2, Color_green);
 151         pi_.pain.line(x1, y1, x2, y1, Color_green);
 152         pi_.pain.line(x2, y1, x2, y2, Color_green);
 153         pi_.pain.line(x1, y2, x2, y2, Color_green);
 154 #endif
 155 }
 156
 157
 158 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 159 {
 160         pos_type pos = bidi_.vis2log(vpos);
 161
 162         docstring str;
 163
 164         // first char
 165         char_type c = par_.getChar(pos);
 166         str += c;
 167         ++vpos;
 168
 169         int const width = theFontMetrics(font).width(c);
 170         int dx = 0;
 171
 172         for (pos_type i = pos - 1; i >= 0; --i) {
 173                 c = par_.getChar(i);
 174                 if (!Encodings::isHebrewComposeChar(c)) {
 175                         if (isPrintableNonspace(c)) {
 176                                 int const width2 = pm_.singleWidth(i,
 177                                         text_metrics_.displayFont(pit_, i));
 178                                 dx = (c == 0x05e8 || // resh
 179                                       c == 0x05d3)   // dalet
 180                                         ? width2 - width
 181                                         : (width2 - width) / 2;
 182                         }
 183                         break;
 184                 }
 185         }
 186
 187         // Draw nikud
 188         pi_.pain.text(int(x_) + dx, yo_, str, font);
 189 }
 190
 191
 192 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 193 {
 194         pos_type pos = bidi_.vis2log(vpos);
 195         docstring str;
 196
 197         // first char
 198         char_type c = par_.getChar(pos);
 199         c = par_.transformChar(c, pos);
 200         str += c;
 201         ++vpos;
 202
 203         int const width = theFontMetrics(font).width(c);
 204         int dx = 0;
 205
 206         for (pos_type i = pos - 1; i >= 0; --i) {
 207                 c = par_.getChar(i);
 208                 if (!Encodings::isArabicComposeChar(c)) {
 209                         if (isPrintableNonspace(c)) {
 210                                 int const width2 = pm_.singleWidth(i,
 211                                                 text_metrics_.displayFont(pit_, i));
 212                                 dx = (width2 - width) / 2;
 213                         }
 214                         break;
 215                 }
 216         }
 217         // Draw nikud
 218         pi_.pain.text(int(x_) + dx, yo_, str, font);
 219 }
 220
 221
 222 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 223                             bool hebrew, bool arabic)
 224 {
 225         // This method takes up 70% of time when typing
 226         pos_type pos = bidi_.vis2log(vpos);
 227         // first character
 228         vector<char_type> str;
 229         str.reserve(100);
 230         str.push_back(par_.getChar(pos));
 231
 232         if (arabic) {
 233                 char_type c = str[0];
 234                 if (c == '(')
 235                         c = ')';
 236                 else if (c == ')')
 237                         c = '(';
 238                 str[0] = par_.transformChar(c, pos);
 239         }
 240
 241         pos_type const end = row_.endpos();
 242         FontSpan const font_span = par_.fontSpan(pos);
 243         // Track-change status.
 244         Change::Type const change_type = par_.lookupChange(pos).type;
 245         // selected text?
 246         bool const selection = pos >= row_.sel_beg && pos < row_.sel_end;
 247
 248         // collect as much similar chars as we can
 249         for (++vpos ; vpos < end ; ++vpos) {
 250                 pos = bidi_.vis2log(vpos);
 251                 if (pos < font_span.first || pos > font_span.last)
 252                         break;
 253
 254                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 255                 if (new_selection != selection)
 256                         // Selection ends or starts here.
 257                         break;
 258
 259                 if (change_type != par_.lookupChange(pos).type)
 260                         // Track change type has changed.
 261                         break;
 262
 263                 char_type c = par_.getChar(pos);
 264
 265                 if (!isPrintableNonspace(c))
 266                         break;
 267
 268                 /* Because we do our own bidi, at this point the strings are
 269                  * already in visual order. However, Qt also applies its own
 270                  * bidi algorithm to strings that it paints to the screen.
 271                  * Therefore, if we were to paint Hebrew/Arabic words as a
 272                  * single string, the letters in the words would get reversed
 273                  * again. In order to avoid that, we don't collect Hebrew/
 274                  * Arabic characters, but rather paint them one at a time.
 275                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 276                  */
 277                 if (hebrew)
 278                         break;
 279
 280                 /* FIXME: these checks are irrelevant, since 'arabic' and
 281                  * 'hebrew' alone are already going to trigger a break.
 282                  * However, this should not be removed completely, because
 283                  * if an alternative solution is found which allows grouping
 284                  * of arabic and hebrew characters, then these breaks may have
 285                  * to be re-applied.
 286
 287                 if (arabic && Encodings::isArabicComposeChar(c))
 288                         break;
 289
 290                 if (hebrew && Encodings::isHebrewComposeChar(c))
 291                         break;
 292                 */
 293
 294                 if (arabic) {
 295                         if (c == '(')
 296                                 c = ')';
 297                         else if (c == ')')
 298                                 c = '(';
 299                         c = par_.transformChar(c, pos);
 300                         /* see comment in hebrew, explaining why we break */
 301                         break;
 302                 }
 303
 304                 str.push_back(c);
 305         }
 306
 307         docstring s(&str[0], str.size());
 308
 309         if (!selection && change_type == Change::UNCHANGED) {
 310                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 311                 return;
 312         }
 313
 314         FontInfo copy = font;
 315         if (change_type == Change::DELETED)
 316                 copy.setColor(Color_deletedtext);
 317         else if (change_type == Change::INSERTED)
 318                 copy.setColor(Color_addedtext);
 319         else if (selection)
 320                 copy.setColor(Color_selectiontext);
 321
 322         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 323 }
 324
 325
 326 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 327                 int desc)
 328 {
 329         if (!lyxrc.mark_foreign_language)
 330                 return;
 331         if (lang == latex_language)
 332                 return;
 333         if (lang == pi_.base.bv->buffer().params().language)
 334                 return;
 335
 336         int const y = yo_ + 1 + desc;
 337         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 338 }
 339
 340
 341 void RowPainter::paintMisspelledMark(double orig_x, int desc)
 342 {
 343         int const y = yo_ + desc;
 344         pi_.pain.wavyHorizontalLine(int(orig_x), y, int(x_) - int(orig_x), Color_red);
 345 }
 346
 347
 348 void RowPainter::paintFromPos(pos_type & vpos)
 349 {
 350         pos_type const pos = bidi_.vis2log(vpos);
 351         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 352         double const orig_x = x_;
 353
 354         // usual characters, no insets
 355         char_type const c = par_.getChar(pos);
 356
 357         // special case languages
 358         string const & lang = orig_font.language()->lang();
 359         bool const hebrew = lang == "hebrew";
 360         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 361                                                 lang == "farsi";
 362
 363         // draw as many chars as we can
 364         if ((!hebrew && !arabic)
 365                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 366                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 367                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 368         } else if (hebrew) {
 369                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 370         } else if (arabic) {
 371                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 372         }
 373
 374         paintForeignMark(orig_x, orig_font.language());
 375         if (orig_font.isMisspelled())
 376                 paintMisspelledMark(orig_x, 3);
 377 }
 378
 379
 380 void RowPainter::paintChangeBar()
 381 {
 382         pos_type const start = row_.pos();
 383         pos_type end = row_.endpos();
 384
 385         if (par_.size() == end) {
 386                 // this is the last row of the paragraph;
 387                 // thus, we must also consider the imaginary end-of-par character
 388                 end++;
 389         }
 390
 391         if (start == end || !par_.isChanged(start, end))
 392                 return;
 393
 394         int const height = text_metrics_.isLastRow(pit_, row_)
 395                 ? row_.ascent()
 396                 : row_.height();
 397
 398         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 399 }
 400
 401
 402 void RowPainter::paintAppendix()
 403 {
 404         // only draw the appendix frame once (for the main text)
 405         if (!par_.params().appendix() || !text_.isMainText(pi_.base.bv->buffer()))
 406                 return;
 407
 408         int y = yo_ - row_.ascent();
 409
 410         if (par_.params().startOfAppendix())
 411                 y += 2 * defaultRowHeight();
 412
 413         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 414         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 415 }
 416
 417
 418 void RowPainter::paintDepthBar()
 419 {
 420         depth_type const depth = par_.getDepth();
 421
 422         if (depth <= 0)
 423                 return;
 424
 425         depth_type prev_depth = 0;
 426         if (!text_metrics_.isFirstRow(pit_, row_)) {
 427                 pit_type pit2 = pit_;
 428                 if (row_.pos() == 0)
 429                         --pit2;
 430                 prev_depth = pars_[pit2].getDepth();
 431         }
 432
 433         depth_type next_depth = 0;
 434         if (!text_metrics_.isLastRow(pit_, row_)) {
 435                 pit_type pit2 = pit_;
 436                 if (row_.endpos() >= pars_[pit2].size())
 437                         ++pit2;
 438                 next_depth = pars_[pit2].getDepth();
 439         }
 440
 441         for (depth_type i = 1; i <= depth; ++i) {
 442                 int const w = nestMargin() / 5;
 443                 int x = int(xo_) + w * i;
 444                 // only consider the changebar space if we're drawing outermost text
 445                 if (text_.isMainText(pi_.base.bv->buffer()))
 446                         x += changebarMargin();
 447
 448                 int const starty = yo_ - row_.ascent();
 449                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 450
 451                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 452
 453                 if (i > prev_depth)
 454                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 455                 if (i > next_depth)
 456                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 457         }
 458 }
 459
 460
 461 int RowPainter::paintAppendixStart(int y)
 462 {
 463         FontInfo pb_font = sane_font;
 464         pb_font.setColor(Color_appendix);
 465         pb_font.decSize();
 466
 467         int w = 0;
 468         int a = 0;
 469         int d = 0;
 470
 471         docstring const label = _("Appendix");
 472         theFontMetrics(pb_font).rectText(label, w, a, d);
 473
 474         int const text_start = int(xo_ + (width_ - w) / 2);
 475         int const text_end = text_start + w;
 476
 477         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 478
 479         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 480         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 481
 482         return 3 * defaultRowHeight();
 483 }
 484
 485
 486 void RowPainter::paintFirst()
 487 {
 488         ParagraphParameters const & parparams = par_.params();
 489
 490         int y_top = 0;
 491
 492         // start of appendix?
 493         if (parparams.startOfAppendix())
 494                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 495
 496         Buffer const & buffer = pi_.base.bv->buffer();
 497         Layout const & layout = par_.layout();
 498
 499         if (buffer.params().paragraph_separation == BufferParams::ParagraphSkipSeparation) {
 500                 if (pit_ != 0) {
 501                         if (layout.latextype == LATEX_PARAGRAPH
 502                                 && !par_.getDepth()) {
 503                                 y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 504                         } else {
 505                                 Layout const & playout = pars_[pit_ - 1].layout();
 506                                 if (playout.latextype == LATEX_PARAGRAPH
 507                                         && !pars_[pit_ - 1].getDepth()) {
 508                                         // is it right to use defskip here, too? (AS)
 509                                         y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 510                                 }
 511                         }
 512                 }
 513         }
 514
 515         bool const is_rtl = text_.isRTL(buffer, par_);
 516         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 517         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 518
 519         // should we print a label?
 520         if (layout.labeltype >= LABEL_STATIC
 521             && (layout.labeltype != LABEL_STATIC
 522                       || layout.latextype != LATEX_ENVIRONMENT
 523                       || is_seq)) {
 524
 525                 FontInfo const font = labelFont();
 526                 FontMetrics const & fm = theFontMetrics(font);
 527
 528                 docstring const str = par_.labelString();
 529                 if (!str.empty()) {
 530                         double x = x_;
 531
 532                         // this is special code for the chapter layout. This is
 533                         // printed in an extra row and has a pagebreak at
 534                         // the top.
 535                         if (layout.counter == "chapter") {
 536                                 double spacing_val = 1.0;
 537                                 if (!parparams.spacing().isDefault()) {
 538                                         spacing_val = parparams.spacing().getValue();
 539                                 } else {
 540                                         spacing_val = buffer.params().spacing().getValue();
 541                                 }
 542
 543                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 544
 545                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 546                                         + int(layout.parsep) * defaultRowHeight();
 547
 548                                 if (is_rtl) {
 549                                         x = width_ - leftMargin() -
 550                                                 fm.width(str);
 551                                 }
 552
 553                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 554                         } else {
 555                                 if (is_rtl) {
 556                                         x = width_ - leftMargin()
 557                                                 + fm.width(layout.labelsep);
 558                                 } else {
 559                                         x = x_ - fm.width(layout.labelsep)
 560                                                 - fm.width(str);
 561                                 }
 562
 563                                 pi_.pain.text(int(x), yo_, str, font);
 564                         }
 565                 }
 566
 567         // the labels at the top of an environment.
 568         // More or less for bibliography
 569         } else if (is_seq &&
 570                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 571                 layout.labeltype == LABEL_BIBLIO ||
 572                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 573                 FontInfo const font = labelFont();
 574                 docstring const str = par_.labelString();
 575                 if (!str.empty()) {
 576                         double spacing_val = 1.0;
 577                         if (!parparams.spacing().isDefault())
 578                                 spacing_val = parparams.spacing().getValue();
 579                         else
 580                                 spacing_val = buffer.params().spacing().getValue();
 581
 582                         FontMetrics const & fm = theFontMetrics(font);
 583
 584                         int const labeladdon = int(fm.maxHeight()
 585                                 * layout.spacing.getValue() * spacing_val);
 586
 587                         int maxdesc =
 588                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 589                                 + (layout.labelbottomsep * defaultRowHeight()));
 590
 591                         double x = x_;
 592                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 593                                 if (is_rtl)
 594                                         x = leftMargin();
 595                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 596                                 x -= fm.width(str) / 2;
 597                         } else if (is_rtl) {
 598                                 x = width_ - leftMargin() -     fm.width(str);
 599                         }
 600                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 601                 }
 602         }
 603 }
 604
 605
 606 void RowPainter::paintLast()
 607 {
 608         bool const is_rtl = text_.isRTL(pi_.base.bv->buffer(), par_);
 609         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 610
 611         // paint imaginary end-of-paragraph character
 612
 613         if (par_.isInserted(par_.size()) || par_.isDeleted(par_.size())) {
 614                 FontMetrics const & fm = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 615                 int const length = fm.maxAscent() / 2;
 616                 ColorCode col = par_.isInserted(par_.size()) ? Color_addedtext : Color_deletedtext;
 617
 618                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 619                            Painter::line_solid, Painter::line_thick);
 620                 pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1, yo_ + 2, col,
 621                            Painter::line_solid, Painter::line_thick);
 622         }
 623
 624         // draw an endlabel
 625
 626         switch (endlabel) {
 627         case END_LABEL_BOX:
 628         case END_LABEL_FILLED_BOX: {
 629                 FontInfo const font = labelFont();
 630                 FontMetrics const & fm = theFontMetrics(font);
 631                 int const size = int(0.75 * fm.maxAscent());
 632                 int const y = yo_ - size;
 633                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 634                 int x = is_rtl ? nestMargin() + changebarMargin()
 635                         : max_row_width - text_metrics_.rightMargin(pm_);
 636
 637                 // If needed, move the box a bit to avoid overlapping with text.
 638                 int const rem = max_row_width - row_.width();
 639                 if (rem <= 0)
 640                         x += is_rtl ? rem : - rem;
 641
 642                 if (endlabel == END_LABEL_BOX)
 643                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 644                 else
 645                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 646                 break;
 647         }
 648
 649         case END_LABEL_STATIC: {
 650                 FontInfo const font = labelFont();
 651                 FontMetrics const & fm = theFontMetrics(font);
 652                 docstring const & str = par_.layout().endlabelstring();
 653                 double const x = is_rtl ?
 654                         x_ - fm.width(str)
 655                         : - text_metrics_.rightMargin(pm_) - row_.width();
 656                 pi_.pain.text(int(x), yo_, str, font);
 657                 break;
 658         }
 659
 660         case END_LABEL_NO_LABEL:
 661                 break;
 662         }
 663 }
 664
 665
 666 void RowPainter::paintOnlyInsets()
 667 {
 668         pos_type const end = row_.endpos();
 669         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 670                 // If outer row has changed, nested insets are repaint completely.
 671                 Inset const * inset = par_.getInset(pos);
 672                 if (!inset)
 673                         continue;
 674                 if (x_ > pi_.base.bv->workWidth())
 675                         continue;
 676                 x_ = pi_.base.bv->coordCache().getInsets().x(inset);
 677                 paintInset(inset, pos);
 678         }
 679 }
 680
 681
 682 void RowPainter::paintText()
 683 {
 684         pos_type const end = row_.endpos();
 685         // Spaces at logical line breaks in bidi text must be skipped during
 686         // painting. However, they may appear visually in the middle
 687         // of a row; they must be skipped, wherever they are...
 688         // * logically "abc_[HEBREW_\nHEBREW]"
 689         // * visually "abc_[_WERBEH\nWERBEH]"
 690         pos_type skipped_sep_vpos = -1;
 691         pos_type body_pos = par_.beginOfBody();
 692         if (body_pos > 0 &&
 693                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 694                 body_pos = 0;
 695         }
 696
 697         Layout const & layout = par_.layout();
 698
 699         bool running_strikeout = false;
 700         bool is_struckout = false;
 701         int last_strikeout_x = 0;
 702
 703         // check for possible inline completion
 704         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 705         pos_type inlineCompletionVPos = -1;
 706         if (inlineCompletionPos.inTexted()
 707             && inlineCompletionPos.text() == &text_
 708             && inlineCompletionPos.pit() == pit_
 709             && inlineCompletionPos.pos() - 1 >= row_.pos()
 710             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 711                 // draw logically behind the previous character
 712                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 713         }
 714
 715         // Use font span to speed things up, see below
 716         FontSpan font_span;
 717         Font font;
 718
 719         // If the last logical character is a separator, don't paint it, unless
 720         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 721         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 722                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 723
 724         for (pos_type vpos = row_.pos(); vpos < end; ) {
 725                 if (x_ > pi_.base.bv->workWidth())
 726                         break;
 727
 728                 // Skip the separator at the logical end of the row
 729                 if (vpos == skipped_sep_vpos) {
 730                         ++vpos;
 731                         continue;
 732                 }
 733
 734                 pos_type const pos = bidi_.vis2log(vpos);
 735
 736                 if (pos >= par_.size()) {
 737                         ++vpos;
 738                         continue;
 739                 }
 740
 741                 // Use font span to speed things up, see above
 742                 if (vpos < font_span.first || vpos > font_span.last) {
 743                         font_span = par_.fontSpan(vpos);
 744                         font = text_metrics_.displayFont(pit_, vpos);
 745
 746                         // split font span if inline completion is inside
 747                         if (font_span.first <= inlineCompletionVPos
 748                             && font_span.last > inlineCompletionVPos)
 749                                 font_span.last = inlineCompletionVPos;
 750                 }
 751
 752                 const int width_pos = pm_.singleWidth(pos, font);
 753
 754                 if (x_ + width_pos < 0) {
 755                         x_ += width_pos;
 756                         ++vpos;
 757                         continue;
 758                 }
 759
 760                 is_struckout = par_.isDeleted(pos);
 761
 762                 if (is_struckout && !running_strikeout) {
 763                         running_strikeout = true;
 764                         last_strikeout_x = int(x_);
 765                 }
 766
 767                 Inset const * inset = par_.getInset(pos);
 768                 bool const highly_editable_inset = inset
 769                         && inset->editable() == Inset::HIGHLY_EDITABLE;
 770
 771                 // If we reach the end of a struck out range, paint it.
 772                 // We also don't paint across things like tables
 773                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 774                         // Calculate 1/3 height of the buffer's default font
 775                         FontMetrics const & fm
 776                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 777                         int const middle = yo_ - fm.maxAscent() / 3;
 778                         pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 779                                 Color_deletedtext, Painter::line_solid, Painter::line_thin);
 780                         running_strikeout = false;
 781                 }
 782
 783                 if (body_pos > 0 && pos == body_pos - 1) {
 784                         int const lwidth = theFontMetrics(labelFont())
 785                                 .width(layout.labelsep);
 786
 787                         x_ += row_.label_hfill + lwidth - width_pos;
 788                 }
 789
 790                 // Is the inline completion in front of character?
 791                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 792                         paintInlineCompletion(font);
 793
 794                 if (par_.isSeparator(pos)) {
 795                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 796                         double const orig_x = x_;
 797                         x_ += width_pos;
 798                         if (pos >= body_pos)
 799                                 x_ += row_.separator;
 800                         paintForeignMark(orig_x, orig_font.language());
 801                         ++vpos;
 802
 803                 } else if (inset) {
 804                         // If outer row has changed, nested insets are repaint completely.
 805                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 806                         paintInset(inset, pos);
 807                         ++vpos;
 808
 809                 } else {
 810                         // paint as many characters as possible.
 811                         paintFromPos(vpos);
 812                 }
 813
 814                 // Is the inline completion after character?
 815                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 816                         paintInlineCompletion(font);
 817         }
 818
 819         // if we reach the end of a struck out range, paint it
 820         if (running_strikeout) {
 821                 // calculate 1/3 height of the buffer's default font
 822                 FontMetrics const & fm
 823                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 824                 int const middle = yo_ - fm.maxAscent() / 3;
 825                 pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 826                         Color_deletedtext, Painter::line_solid, Painter::line_thin);
 827                 running_strikeout = false;
 828         }
 829 }
 830
 831
 832 void RowPainter::paintInlineCompletion(Font const & font)
 833 {
 834         docstring completion = pi_.base.bv->inlineCompletion();
 835         FontInfo f = font.fontInfo();
 836         bool rtl = font.isRightToLeft();
 837
 838         // draw the unique and the non-unique completion part
 839         // Note: this is not time-critical as it is
 840         // only done once per screen.
 841         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 842         docstring s1 = completion.substr(0, uniqueTo);
 843         docstring s2 = completion.substr(uniqueTo);
 844         ColorCode c1 = Color_inlinecompletion;
 845         ColorCode c2 = Color_nonunique_inlinecompletion;
 846
 847         // right to left?
 848         if (rtl) {
 849                 swap(s1, s2);
 850                 swap(c1, c2);
 851         }
 852
 853         if (s1.size() > 0) {
 854                 f.setColor(c1);
 855                 pi_.pain.text(int(x_), yo_, s1, f);
 856                 x_ += theFontMetrics(font).width(s1);
 857         }
 858
 859         if (s2.size() > 0) {
 860                 f.setColor(c2);
 861                 pi_.pain.text(int(x_), yo_, s2, f);
 862                 x_ += theFontMetrics(font).width(s2);
 863         }
 864 }
 865
 866 } // namespace lyx