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 <boost/assert.hpp>
  47 #include <boost/crc.hpp>
  48
  49 #include <ostream>
  50
  51 using namespace std;
  52
  53 namespace lyx {
  54
  55 using frontend::Painter;
  56 using frontend::FontMetrics;
  57
  58 RowPainter::RowPainter(PainterInfo & pi,
  59         Text const & text, pit_type pit, Row const & row, Bidi & bidi, int x, int y)
  60         : pi_(pi), text_(text),
  61           text_metrics_(pi_.base.bv->textMetrics(&text)),
  62           pars_(text.paragraphs()),
  63           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  64           pm_(text_metrics_.parMetrics(pit)),
  65           bidi_(bidi), erased_(pi_.erased_),
  66           xo_(x), yo_(y), width_(text_metrics_.width())
  67 {
  68         bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
  69         x_ = row_.x + xo_;
  70
  71         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  72         //row_.dump();
  73
  74         BOOST_ASSERT(pit >= 0);
  75         BOOST_ASSERT(pit < int(text.paragraphs().size()));
  76 }
  77
  78
  79 FontInfo RowPainter::labelFont() const
  80 {
  81         return text_.labelFont(pi_.base.bv->buffer(), par_);
  82 }
  83
  84
  85 int RowPainter::leftMargin() const
  86 {
  87         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
  88                 row_.pos());
  89 }
  90
  91 // If you want to debug inset metrics uncomment the following line:
  92 //#define DEBUG_METRICS
  93 // This draws green lines around each inset.
  94
  95
  96 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
  97 {
  98         Font const font = text_metrics_.displayFont(pit_, pos);
  99
 100         BOOST_ASSERT(inset);
 101         // Backup full_repaint status because some insets (InsetTabular)
 102         // requires a full repaint
 103         bool pi_full_repaint = pi_.full_repaint;
 104
 105         // FIXME: We should always use font, see documentation of
 106         // noFontChange() in Inset.h.
 107         pi_.base.font = inset->noFontChange() ?
 108                 pi_.base.bv->buffer().params().getFont().fontInfo() :
 109                 font.fontInfo();
 110         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 111         pi_.erased_ = erased_ || par_.isDeleted(pos);
 112         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 113         // insets are painted completely. Recursive
 114         inset->drawSelection(pi_, int(x_), yo_);
 115         inset->draw(pi_, int(x_), yo_);
 116
 117         Dimension const & dim = pm_.insetDimension(inset);
 118
 119         paintForeignMark(x_, font.language(), dim.descent());
 120
 121         x_ += dim.width();
 122
 123         // Restore full_repaint status.
 124         pi_.full_repaint = pi_full_repaint;
 125
 126 #ifdef DEBUG_METRICS
 127         int const x1 = int(x_ - dim.width());
 128         Dimension dim2;
 129         BOOST_ASSERT(max_witdh_ > 0);
 130         int right_margin = text_metrics_.rightMargin(pm_);
 131         int const w = max_witdh_ - leftMargin() - right_margin;
 132         MetricsInfo mi(pi_.base.bv, font.fontInfo(), w);
 133         inset->metrics(mi, dim2);
 134         if (dim.wid != dim2.wid)
 135                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 136                        << " draw width " << dim.width()
 137                        << "> metrics width " << dim2.wid << "." << endl;
 138         if (dim->asc != dim2.asc)
 139                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 140                        << " draw ascent " << dim.ascent()
 141                        << "> metrics ascent " << dim2.asc << "." << endl;
 142         if (dim2.descent() != dim.des)
 143                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 144                        << " draw ascent " << dim.descent()
 145                        << "> metrics descent " << dim2.des << "." << endl;
 146         BOOST_ASSERT(dim2.wid == dim.wid);
 147         BOOST_ASSERT(dim2.asc == dim.asc);
 148         BOOST_ASSERT(dim2.des == dim.des);
 149         int const x2 = x1 + dim.wid;
 150         int const y1 = yo_ + dim.des;
 151         int const y2 = yo_ - dim.asc;
 152         pi_.pain.line(x1, y1, x1, y2, Color_green);
 153         pi_.pain.line(x1, y1, x2, y1, Color_green);
 154         pi_.pain.line(x2, y1, x2, y2, Color_green);
 155         pi_.pain.line(x1, y2, x2, y2, Color_green);
 156 #endif
 157 }
 158
 159
 160 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 161 {
 162         pos_type pos = bidi_.vis2log(vpos);
 163
 164         docstring str;
 165
 166         // first char
 167         char_type c = par_.getChar(pos);
 168         str += c;
 169         ++vpos;
 170
 171         int const width = theFontMetrics(font).width(c);
 172         int dx = 0;
 173
 174         for (pos_type i = pos - 1; i >= 0; --i) {
 175                 c = par_.getChar(i);
 176                 if (!Encodings::isHebrewComposeChar(c)) {
 177                         if (isPrintableNonspace(c)) {
 178                                 int const width2 = pm_.singleWidth(i,
 179                                         text_metrics_.displayFont(pit_, i));
 180                                 dx = (c == 0x05e8 || // resh
 181                                       c == 0x05d3)   // dalet
 182                                         ? width2 - width
 183                                         : (width2 - width) / 2;
 184                         }
 185                         break;
 186                 }
 187         }
 188
 189         // Draw nikud
 190         pi_.pain.text(int(x_) + dx, yo_, str, font);
 191 }
 192
 193
 194 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 195 {
 196         pos_type pos = bidi_.vis2log(vpos);
 197         docstring str;
 198
 199         // first char
 200         char_type c = par_.getChar(pos);
 201         c = par_.transformChar(c, pos);
 202         str += c;
 203         ++vpos;
 204
 205         int const width = theFontMetrics(font).width(c);
 206         int dx = 0;
 207
 208         for (pos_type i = pos - 1; i >= 0; --i) {
 209                 c = par_.getChar(i);
 210                 if (!Encodings::isArabicComposeChar(c)) {
 211                         if (isPrintableNonspace(c)) {
 212                                 int const width2 = pm_.singleWidth(i,
 213                                                 text_metrics_.displayFont(pit_, i));
 214                                 dx = (width2 - width) / 2;
 215                         }
 216                         break;
 217                 }
 218         }
 219         // Draw nikud
 220         pi_.pain.text(int(x_) + dx, yo_, str, font);
 221 }
 222
 223
 224 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 225                             bool hebrew, bool arabic)
 226 {
 227         // This method takes up 70% of time when typing
 228         pos_type pos = bidi_.vis2log(vpos);
 229         pos_type const end = row_.endpos();
 230         FontSpan const font_span = par_.fontSpan(pos);
 231         Change::Type const prev_change = par_.lookupChange(pos).type;
 232
 233         // first character
 234         vector<char_type> str;
 235         str.reserve(100);
 236         str.push_back(par_.getChar(pos));
 237
 238         if (arabic) {
 239                 char_type c = str[0];
 240                 if (c == '(')
 241                         c = ')';
 242                 else if (c == ')')
 243                         c = '(';
 244                 str[0] = par_.transformChar(c, pos);
 245         }
 246
 247         // selected text?
 248         pit_type const p0 = pi_.base.bv->cursor().selBegin().pit();
 249         bool selection = row_.sel_beg > -1 && row_.sel_beg != row_.sel_end
 250                 && ((pit_ == p0 &&  (pos >= row_.sel_beg && pos < row_.sel_end))
 251                         || (pit_ > p0 &&  pos < row_.sel_end));
 252
 253         // collect as much similar chars as we can
 254         for (++vpos ; vpos < end ; ++vpos) {
 255                 pos = bidi_.vis2log(vpos);
 256                 if (pos < font_span.first || pos > font_span.last)
 257                         break;
 258
 259                 if (row_.sel_beg > -1 && row_.sel_beg != row_.sel_end &&
 260                         ((pit_ == p0 && pos == row_.sel_beg) || pos == row_.sel_end))
 261                         break;
 262
 263                 if (prev_change != par_.lookupChange(pos).type)
 264                         break;
 265
 266                 char_type c = par_.getChar(pos);
 267
 268                 if (!isPrintableNonspace(c))
 269                         break;
 270
 271                 /* Because we do our own bidi, at this point the strings are
 272                  * already in visual order. However, Qt also applies its own
 273                  * bidi algorithm to strings that it paints to the screen.
 274                  * Therefore, if we were to paint Hebrew/Arabic words as a
 275                  * single string, the letters in the words would get reversed
 276                  * again. In order to avoid that, we don't collect Hebrew/
 277                  * Arabic characters, but rather paint them one at a time.
 278                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 279                  */
 280                 if (hebrew)
 281                         break;
 282
 283                 /* FIXME: these checks are irrelevant, since 'arabic' and
 284                  * 'hebrew' alone are already going to trigger a break.
 285                  * However, this should not be removed completely, because
 286                  * if an alternative solution is found which allows grouping
 287                  * of arabic and hebrew characters, then these breaks may have
 288                  * to be re-applied.
 289
 290                 if (arabic && Encodings::isArabicComposeChar(c))
 291                         break;
 292
 293                 if (hebrew && Encodings::isHebrewComposeChar(c))
 294                         break;
 295                 */
 296
 297                 if (arabic) {
 298                         if (c == '(')
 299                                 c = ')';
 300                         else if (c == ')')
 301                                 c = '(';
 302                         c = par_.transformChar(c, pos);
 303                         /* see comment in hebrew, explaining why we break */
 304                         break;
 305                 }
 306
 307                 str.push_back(c);
 308         }
 309
 310         docstring s(&str[0], str.size());
 311
 312         if (selection || prev_change != Change::UNCHANGED) {
 313                 FontInfo copy = font;
 314                 if (selection) {
 315                         copy.setColor(Color_selectiontext);
 316                 } else if (prev_change == Change::DELETED) {
 317                         copy.setColor(Color_deletedtext);
 318                 } else if (prev_change == Change::INSERTED) {
 319                         copy.setColor(Color_addedtext);
 320                 }
 321                 x_ += pi_.pain.text(int(x_), yo_, s, copy);
 322         } else {
 323                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 324         }
 325 }
 326
 327
 328 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 329                 int desc)
 330 {
 331         if (!lyxrc.mark_foreign_language)
 332                 return;
 333         if (lang == latex_language)
 334                 return;
 335         if (lang == pi_.base.bv->buffer().params().language)
 336                 return;
 337
 338         int const y = yo_ + 1 + desc;
 339         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 340 }
 341
 342
 343 void RowPainter::paintFromPos(pos_type & vpos)
 344 {
 345         pos_type const pos = bidi_.vis2log(vpos);
 346         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 347         double const orig_x = x_;
 348
 349         // usual characters, no insets
 350         char_type const c = par_.getChar(pos);
 351
 352         // special case languages
 353         string const & lang = orig_font.language()->lang();
 354         bool const hebrew = lang == "hebrew";
 355         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 356                                                 lang == "farsi";
 357
 358         // draw as many chars as we can
 359         if ((!hebrew && !arabic)
 360                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 361                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 362                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 363         } else if (hebrew) {
 364                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 365         } else if (arabic) {
 366                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 367         }
 368
 369         paintForeignMark(orig_x, orig_font.language());
 370 }
 371
 372
 373 void RowPainter::paintChangeBar()
 374 {
 375         pos_type const start = row_.pos();
 376         pos_type end = row_.endpos();
 377
 378         if (par_.size() == end) {
 379                 // this is the last row of the paragraph;
 380                 // thus, we must also consider the imaginary end-of-par character
 381                 end++;
 382         }
 383
 384         if (start == end || !par_.isChanged(start, end))
 385                 return;
 386
 387         int const height = text_metrics_.isLastRow(pit_, row_)
 388                 ? row_.ascent()
 389                 : row_.height();
 390
 391         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 392 }
 393
 394
 395 void RowPainter::paintAppendix()
 396 {
 397         // only draw the appendix frame once (for the main text)
 398         if (!par_.params().appendix() || !text_.isMainText(pi_.base.bv->buffer()))
 399                 return;
 400
 401         int y = yo_ - row_.ascent();
 402
 403         if (par_.params().startOfAppendix())
 404                 y += 2 * defaultRowHeight();
 405
 406         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 407         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 408 }
 409
 410
 411 void RowPainter::paintDepthBar()
 412 {
 413         depth_type const depth = par_.getDepth();
 414
 415         if (depth <= 0)
 416                 return;
 417
 418         depth_type prev_depth = 0;
 419         if (!text_metrics_.isFirstRow(pit_, row_)) {
 420                 pit_type pit2 = pit_;
 421                 if (row_.pos() == 0)
 422                         --pit2;
 423                 prev_depth = pars_[pit2].getDepth();
 424         }
 425
 426         depth_type next_depth = 0;
 427         if (!text_metrics_.isLastRow(pit_, row_)) {
 428                 pit_type pit2 = pit_;
 429                 if (row_.endpos() >= pars_[pit2].size())
 430                         ++pit2;
 431                 next_depth = pars_[pit2].getDepth();
 432         }
 433
 434         for (depth_type i = 1; i <= depth; ++i) {
 435                 int const w = nestMargin() / 5;
 436                 int x = int(xo_) + w * i;
 437                 // only consider the changebar space if we're drawing outermost text
 438                 if (text_.isMainText(pi_.base.bv->buffer()))
 439                         x += changebarMargin();
 440
 441                 int const starty = yo_ - row_.ascent();
 442                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 443
 444                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 445
 446                 if (i > prev_depth)
 447                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 448                 if (i > next_depth)
 449                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 450         }
 451 }
 452
 453
 454 int RowPainter::paintAppendixStart(int y)
 455 {
 456         FontInfo pb_font = sane_font;
 457         pb_font.setColor(Color_appendix);
 458         pb_font.decSize();
 459
 460         int w = 0;
 461         int a = 0;
 462         int d = 0;
 463
 464         docstring const label = _("Appendix");
 465         theFontMetrics(pb_font).rectText(label, w, a, d);
 466
 467         int const text_start = int(xo_ + (width_ - w) / 2);
 468         int const text_end = text_start + w;
 469
 470         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 471
 472         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 473         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 474
 475         return 3 * defaultRowHeight();
 476 }
 477
 478
 479 void RowPainter::paintFirst()
 480 {
 481         ParagraphParameters const & parparams = par_.params();
 482
 483         int y_top = 0;
 484
 485         // start of appendix?
 486         if (parparams.startOfAppendix())
 487                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 488
 489         Buffer const & buffer = pi_.base.bv->buffer();
 490         Layout const & layout = par_.layout();
 491
 492         if (buffer.params().paragraph_separation == BufferParams::ParagraphSkipSeparation) {
 493                 if (pit_ != 0) {
 494                         if (layout.latextype == LATEX_PARAGRAPH
 495                                 && !par_.getDepth()) {
 496                                 y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 497                         } else {
 498                                 Layout const & playout = pars_[pit_ - 1].layout();
 499                                 if (playout.latextype == LATEX_PARAGRAPH
 500                                         && !pars_[pit_ - 1].getDepth()) {
 501                                         // is it right to use defskip here, too? (AS)
 502                                         y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 503                                 }
 504                         }
 505                 }
 506         }
 507
 508         bool const is_rtl = text_.isRTL(buffer, par_);
 509         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 510         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 511
 512         // should we print a label?
 513         if (layout.labeltype >= LABEL_STATIC
 514             && (layout.labeltype != LABEL_STATIC
 515                       || layout.latextype != LATEX_ENVIRONMENT
 516                       || is_seq)) {
 517
 518                 FontInfo const font = labelFont();
 519                 FontMetrics const & fm = theFontMetrics(font);
 520
 521                 docstring const str = par_.labelString();
 522                 if (!str.empty()) {
 523                         double x = x_;
 524
 525                         // this is special code for the chapter layout. This is
 526                         // printed in an extra row and has a pagebreak at
 527                         // the top.
 528                         if (layout.counter == "chapter") {
 529                                 double spacing_val = 1.0;
 530                                 if (!parparams.spacing().isDefault()) {
 531                                         spacing_val = parparams.spacing().getValue();
 532                                 } else {
 533                                         spacing_val = buffer.params().spacing().getValue();
 534                                 }
 535
 536                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 537
 538                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 539                                         + int(layout.parsep) * defaultRowHeight();
 540
 541                                 if (is_rtl) {
 542                                         x = width_ - leftMargin() -
 543                                                 fm.width(str);
 544                                 }
 545
 546                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 547                         } else {
 548                                 if (is_rtl) {
 549                                         x = width_ - leftMargin()
 550                                                 + fm.width(layout.labelsep);
 551                                 } else {
 552                                         x = x_ - fm.width(layout.labelsep)
 553                                                 - fm.width(str);
 554                                 }
 555
 556                                 pi_.pain.text(int(x), yo_, str, font);
 557                         }
 558                 }
 559
 560         // the labels at the top of an environment.
 561         // More or less for bibliography
 562         } else if (is_seq &&
 563                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 564                 layout.labeltype == LABEL_BIBLIO ||
 565                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 566                 FontInfo const font = labelFont();
 567                 docstring const str = par_.labelString();
 568                 if (!str.empty()) {
 569                         double spacing_val = 1.0;
 570                         if (!parparams.spacing().isDefault())
 571                                 spacing_val = parparams.spacing().getValue();
 572                         else
 573                                 spacing_val = buffer.params().spacing().getValue();
 574
 575                         FontMetrics const & fm = theFontMetrics(font);
 576
 577                         int const labeladdon = int(fm.maxHeight()
 578                                 * layout.spacing.getValue() * spacing_val);
 579
 580                         int maxdesc =
 581                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 582                                 + (layout.labelbottomsep * defaultRowHeight()));
 583
 584                         double x = x_;
 585                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 586                                 if (is_rtl)
 587                                         x = leftMargin();
 588                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 589                                 x -= fm.width(str) / 2;
 590                         } else if (is_rtl) {
 591                                 x = width_ - leftMargin() -     fm.width(str);
 592                         }
 593                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 594                 }
 595         }
 596 }
 597
 598
 599 void RowPainter::paintLast()
 600 {
 601         bool const is_rtl = text_.isRTL(pi_.base.bv->buffer(), par_);
 602         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 603
 604         // paint imaginary end-of-paragraph character
 605
 606         if (par_.isInserted(par_.size()) || par_.isDeleted(par_.size())) {
 607                 FontMetrics const & fm = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 608                 int const length = fm.maxAscent() / 2;
 609                 ColorCode col = par_.isInserted(par_.size()) ? Color_addedtext : Color_deletedtext;
 610
 611                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 612                            Painter::line_solid, Painter::line_thick);
 613                 pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1, yo_ + 2, col,
 614                            Painter::line_solid, Painter::line_thick);
 615         }
 616
 617         // draw an endlabel
 618
 619         switch (endlabel) {
 620         case END_LABEL_BOX:
 621         case END_LABEL_FILLED_BOX: {
 622                 FontInfo const font = labelFont();
 623                 FontMetrics const & fm = theFontMetrics(font);
 624                 int const size = int(0.75 * fm.maxAscent());
 625                 int const y = yo_ - size;
 626                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 627                 int x = is_rtl ? nestMargin() + changebarMargin()
 628                         : max_row_width - text_metrics_.rightMargin(pm_);
 629
 630                 // If needed, move the box a bit to avoid overlapping with text.
 631                 int const rem = max_row_width - row_.width();
 632                 if (rem <= 0)
 633                         x += is_rtl ? rem : - rem;
 634
 635                 if (endlabel == END_LABEL_BOX)
 636                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 637                 else
 638                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 639                 break;
 640         }
 641
 642         case END_LABEL_STATIC: {
 643                 FontInfo const font = labelFont();
 644                 FontMetrics const & fm = theFontMetrics(font);
 645                 docstring const & str = par_.layout().endlabelstring();
 646                 double const x = is_rtl ?
 647                         x_ - fm.width(str)
 648                         : - text_metrics_.rightMargin(pm_) - row_.width();
 649                 pi_.pain.text(int(x), yo_, str, font);
 650                 break;
 651         }
 652
 653         case END_LABEL_NO_LABEL:
 654                 break;
 655         }
 656 }
 657
 658
 659 void RowPainter::paintOnlyInsets()
 660 {
 661         pos_type const end = row_.endpos();
 662         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 663                 // If outer row has changed, nested insets are repaint completely.
 664                 Inset const * inset = par_.getInset(pos);
 665                 if (!inset)
 666                         continue;
 667                 if (x_ > pi_.base.bv->workWidth())
 668                         continue;
 669                 x_ = pi_.base.bv->coordCache().getInsets().x(inset);
 670                 paintInset(inset, pos);
 671         }
 672 }
 673
 674
 675 void RowPainter::paintText()
 676 {
 677         pos_type const end = row_.endpos();
 678         // Spaces at logical line breaks in bidi text must be skipped during
 679         // painting. However, they may appear visually in the middle
 680         // of a row; they must be skipped, wherever they are...
 681         // * logically "abc_[HEBREW_\nHEBREW]"
 682         // * visually "abc_[_WERBEH\nWERBEH]"
 683         pos_type skipped_sep_vpos = -1;
 684         pos_type body_pos = par_.beginOfBody();
 685         if (body_pos > 0 &&
 686                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 687                 body_pos = 0;
 688         }
 689
 690         Layout const & layout = par_.layout();
 691
 692         bool running_strikeout = false;
 693         bool is_struckout = false;
 694         int last_strikeout_x = 0;
 695
 696         // check for possible inline completion
 697         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 698         pos_type inlineCompletionVPos = -1;
 699         if (inlineCompletionPos.inTexted()
 700             && inlineCompletionPos.text() == &text_
 701             && inlineCompletionPos.pit() == pit_
 702             && inlineCompletionPos.pos() - 1 >= row_.pos()
 703             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 704                 // draw logically behind the previous character
 705                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 706         }
 707
 708         // Use font span to speed things up, see below
 709         FontSpan font_span;
 710         Font font;
 711
 712         // If the last logical character is a separator, don't paint it, unless
 713         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 714         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 715                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 716
 717         for (pos_type vpos = row_.pos(); vpos < end; ) {
 718                 if (x_ > pi_.base.bv->workWidth())
 719                         break;
 720
 721                 // Skip the separator at the logical end of the row
 722                 if (vpos == skipped_sep_vpos) {
 723                         ++vpos;
 724                         continue;
 725                 }
 726
 727                 pos_type const pos = bidi_.vis2log(vpos);
 728
 729                 if (pos >= par_.size()) {
 730                         ++vpos;
 731                         continue;
 732                 }
 733
 734                 // Use font span to speed things up, see above
 735                 if (vpos < font_span.first || vpos > font_span.last) {
 736                         font_span = par_.fontSpan(vpos);
 737                         font = text_metrics_.displayFont(pit_, vpos);
 738
 739                         // split font span if inline completion is inside
 740                         if (font_span.first <= inlineCompletionVPos
 741                             && font_span.last > inlineCompletionVPos)
 742                                 font_span.last = inlineCompletionVPos;
 743                 }
 744
 745                 const int width_pos = pm_.singleWidth(pos, font);
 746
 747                 if (x_ + width_pos < 0) {
 748                         x_ += width_pos;
 749                         ++vpos;
 750                         continue;
 751                 }
 752
 753                 is_struckout = par_.isDeleted(pos);
 754
 755                 if (is_struckout && !running_strikeout) {
 756                         running_strikeout = true;
 757                         last_strikeout_x = int(x_);
 758                 }
 759
 760                 Inset const * inset = par_.getInset(pos);
 761                 bool const highly_editable_inset = inset
 762                         && inset->editable() == Inset::HIGHLY_EDITABLE;
 763
 764                 // If we reach the end of a struck out range, paint it.
 765                 // We also don't paint across things like tables
 766                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 767                         // Calculate 1/3 height of the buffer's default font
 768                         FontMetrics const & fm
 769                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 770                         int const middle = yo_ - fm.maxAscent() / 3;
 771                         pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 772                                 Color_deletedtext, Painter::line_solid, Painter::line_thin);
 773                         running_strikeout = false;
 774                 }
 775
 776                 if (body_pos > 0 && pos == body_pos - 1) {
 777                         int const lwidth = theFontMetrics(labelFont())
 778                                 .width(layout.labelsep);
 779
 780                         x_ += row_.label_hfill + lwidth - width_pos;
 781                 }
 782
 783                 // Is the inline completion in front of character?
 784                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 785                         paintInlineCompletion(font);
 786
 787                 if (par_.isSeparator(pos)) {
 788                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 789                         double const orig_x = x_;
 790                         x_ += width_pos;
 791                         if (pos >= body_pos)
 792                                 x_ += row_.separator;
 793                         paintForeignMark(orig_x, orig_font.language());
 794                         ++vpos;
 795
 796                 } else if (inset) {
 797                         // If outer row has changed, nested insets are repaint completely.
 798                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 799                         paintInset(inset, pos);
 800                         ++vpos;
 801
 802                 } else {
 803                         // paint as many characters as possible.
 804                         paintFromPos(vpos);
 805                 }
 806
 807                 // Is the inline completion after character?
 808                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 809                         paintInlineCompletion(font);
 810         }
 811
 812         // if we reach the end of a struck out range, paint it
 813         if (running_strikeout) {
 814                 // calculate 1/3 height of the buffer's default font
 815                 FontMetrics const & fm
 816                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 817                 int const middle = yo_ - fm.maxAscent() / 3;
 818                 pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 819                         Color_deletedtext, Painter::line_solid, Painter::line_thin);
 820                 running_strikeout = false;
 821         }
 822 }
 823
 824
 825 void RowPainter::paintInlineCompletion(Font const & font)
 826 {
 827         docstring completion = pi_.base.bv->inlineCompletion();
 828         FontInfo f = font.fontInfo();
 829         bool rtl = font.isRightToLeft();
 830
 831         // draw the unique and the non-unique completion part
 832         // Note: this is not time-critical as it is
 833         // only done once per screen.
 834         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 835         docstring s1 = completion.substr(0, uniqueTo);
 836         docstring s2 = completion.substr(uniqueTo);
 837         ColorCode c1 = Color_inlinecompletion;
 838         ColorCode c2 = Color_nonunique_inlinecompletion;
 839
 840         // right to left?
 841         if (rtl) {
 842                 swap(s1, s2);
 843                 reverse(s1.begin(), s1.end());
 844                 reverse(s2.begin(), s2.end());
 845                 swap(c1, c2);
 846         }
 847
 848         if (s1.size() > 0) {
 849                 f.setColor(c1);
 850                 pi_.pain.text(int(x_), yo_, s1, f);
 851                 x_ += theFontMetrics(font).width(s1);
 852         }
 853
 854         if (s2.size() > 0) {
 855                 f.setColor(c2);
 856                 pi_.pain.text(int(x_), yo_, s2, f);
 857                 x_ += theFontMetrics(font).width(s2);
 858         }
 859 }
 860
 861 } // namespace lyx