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
  14 #include "rowpainter.h"
  15
  16 #include "Bidi.h"
  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 "Encoding.h"
  24 #include "support/gettext.h"
  25 #include "Language.h"
  26 #include "Layout.h"
  27 #include "LyXRC.h"
  28 #include "Row.h"
  29 #include "MetricsInfo.h"
  30 #include "Paragraph.h"
  31 #include "ParagraphMetrics.h"
  32 #include "paragraph_funcs.h"
  33 #include "ParagraphParameters.h"
  34 #include "TextMetrics.h"
  35 #include "VSpace.h"
  36
  37 #include "frontends/FontMetrics.h"
  38 #include "frontends/Painter.h"
  39
  40 #include "insets/InsetText.h"
  41
  42 #include "support/debug.h"
  43 #include "support/textutils.h"
  44
  45 #include <boost/crc.hpp>
  46
  47 #include <ostream>
  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         BOOST_ASSERT(pit >= 0);
  73         BOOST_ASSERT(pit < int(text.paragraphs().size()));
  74
  75         // check for possible inline completion
  76         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
  77         inlineCompletionVPos_ = -1;
  78         if (inlineCompletionPos.inTexted()
  79             && inlineCompletionPos.text() == &text_
  80             && inlineCompletionPos.pit() == pit_) {
  81                 // draw visually behind the previous character
  82                 // FIXME: probably special RTL handling needed here
  83                 inlineCompletionVPos_ = bidi_.log2vis(inlineCompletionPos.pos() - 1);
  84         }
  85 }
  86
  87
  88 FontInfo const RowPainter::getLabelFont() const
  89 {
  90         return text_.getLabelFont(pi_.base.bv->buffer(), par_);
  91 }
  92
  93
  94 int RowPainter::leftMargin() const
  95 {
  96         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
  97                 row_.pos());
  98 }
  99
 100 // If you want to debug inset metrics uncomment the following line:
 101 //#define DEBUG_METRICS
 102 // This draws green lines around each inset.
 103
 104
 105 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
 106 {
 107         Font const font = text_metrics_.getDisplayFont(pit_, pos);
 108
 109         BOOST_ASSERT(inset);
 110         // Backup full_repaint status because some insets (InsetTabular)
 111         // requires a full repaint
 112         bool pi_full_repaint = pi_.full_repaint;
 113
 114         // FIXME: We should always use font, see documentation of
 115         // noFontChange() in Inset.h.
 116         pi_.base.font = inset->noFontChange() ?
 117                 pi_.base.bv->buffer().params().getFont().fontInfo() :
 118                 font.fontInfo();
 119         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 120         pi_.erased_ = erased_ || par_.isDeleted(pos);
 121         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 122         // insets are painted completely. Recursive
 123         inset->drawSelection(pi_, int(x_), yo_);
 124         inset->draw(pi_, int(x_), yo_);
 125
 126         Dimension const & dim = pm_.insetDimension(inset);
 127
 128         paintForeignMark(x_, font.language(), dim.descent());
 129
 130         x_ += dim.width();
 131
 132         // Restore full_repaint status.
 133         pi_.full_repaint = pi_full_repaint;
 134
 135 #ifdef DEBUG_METRICS
 136         int const x1 = int(x_ - dim.width());
 137         Dimension dim2;
 138         BOOST_ASSERT(max_witdh_ > 0);
 139         int right_margin = text_metrics_.rightMargin(pm_);
 140         int const w = max_witdh_ - leftMargin() - right_margin;
 141         MetricsInfo mi(pi_.base.bv, font.fontInfo(), w);
 142         inset->metrics(mi, dim2);
 143         if (dim.wid != dim2.wid)
 144                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 145                        << " draw width " << dim.width()
 146                        << "> metrics width " << dim2.wid << "." << endl;
 147         if (dim->asc != dim2.asc)
 148                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 149                        << " draw ascent " << dim.ascent()
 150                        << "> metrics ascent " << dim2.asc << "." << endl;
 151         if (dim2.descent() != dim.des)
 152                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 153                        << " draw ascent " << dim.descent()
 154                        << "> metrics descent " << dim2.des << "." << endl;
 155         BOOST_ASSERT(dim2.wid == dim.wid);
 156         BOOST_ASSERT(dim2.asc == dim.asc);
 157         BOOST_ASSERT(dim2.des == dim.des);
 158         int const x2 = x1 + dim.wid;
 159         int const y1 = yo_ + dim.des;
 160         int const y2 = yo_ - dim.asc;
 161         pi_.pain.line(x1, y1, x1, y2, Color_green);
 162         pi_.pain.line(x1, y1, x2, y1, Color_green);
 163         pi_.pain.line(x2, y1, x2, y2, Color_green);
 164         pi_.pain.line(x1, y2, x2, y2, Color_green);
 165 #endif
 166 }
 167
 168
 169 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 170 {
 171         pos_type pos = bidi_.vis2log(vpos);
 172
 173         docstring str;
 174
 175         // first char
 176         char_type c = par_.getChar(pos);
 177         str += c;
 178         ++vpos;
 179
 180         int const width = theFontMetrics(font).width(c);
 181         int dx = 0;
 182
 183         for (pos_type i = pos - 1; i >= 0; --i) {
 184                 c = par_.getChar(i);
 185                 if (!Encodings::isComposeChar_hebrew(c)) {
 186                         if (isPrintableNonspace(c)) {
 187                                 int const width2 = pm_.singleWidth(i,
 188                                         text_metrics_.getDisplayFont(pit_, i));
 189                                 dx = (c == 0x05e8 || // resh
 190                                       c == 0x05d3)   // dalet
 191                                         ? width2 - width
 192                                         : (width2 - width) / 2;
 193                         }
 194                         break;
 195                 }
 196         }
 197
 198         // Draw nikud
 199         pi_.pain.text(int(x_) + dx, yo_, str, font);
 200 }
 201
 202
 203 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 204 {
 205         pos_type pos = bidi_.vis2log(vpos);
 206         docstring str;
 207
 208         // first char
 209         char_type c = par_.getChar(pos);
 210         c = par_.transformChar(c, pos);
 211         str += c;
 212         ++vpos;
 213
 214         int const width = theFontMetrics(font).width(c);
 215         int dx = 0;
 216
 217         for (pos_type i = pos - 1; i >= 0; --i) {
 218                 c = par_.getChar(i);
 219                 if (!Encodings::isComposeChar_arabic(c)) {
 220                         if (isPrintableNonspace(c)) {
 221                                 int const width2 = pm_.singleWidth(i,
 222                                                 text_metrics_.getDisplayFont(pit_, i));
 223                                 dx = (width2 - width) / 2;
 224                         }
 225                         break;
 226                 }
 227         }
 228         // Draw nikud
 229         pi_.pain.text(int(x_) + dx, yo_, str, font);
 230 }
 231
 232
 233 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 234                             bool hebrew, bool arabic)
 235 {
 236         // This method takes up 70% of time when typing
 237         pos_type pos = bidi_.vis2log(vpos);
 238         pos_type const end = row_.endpos();
 239         FontSpan const font_span = par_.fontSpan(pos);
 240         Change::Type const prev_change = par_.lookupChange(pos).type;
 241
 242         // first character
 243         vector<char_type> str;
 244         str.reserve(100);
 245         str.push_back(par_.getChar(pos));
 246
 247         if (arabic) {
 248                 char_type c = str[0];
 249                 if (c == '(')
 250                         c = ')';
 251                 else if (c == ')')
 252                         c = '(';
 253                 str[0] = par_.transformChar(c, pos);
 254         }
 255
 256         // collect as much similar chars as we can
 257         for (++vpos ; vpos < end ; ++vpos) {
 258                 pos = bidi_.vis2log(vpos);
 259                 if (pos < font_span.first || pos > font_span.last)
 260                         break;
 261
 262                 if (prev_change != par_.lookupChange(pos).type)
 263                         break;
 264
 265                 char_type c = par_.getChar(pos);
 266
 267                 if (!isPrintableNonspace(c))
 268                         break;
 269
 270                 /* Because we do our own bidi, at this point the strings are
 271                  * already in visual order. However, Qt also applies its own
 272                  * bidi algorithm to strings that it paints to the screen.
 273                  * Therefore, if we were to paint Hebrew/Arabic words as a
 274                  * single string, the letters in the words would get reversed
 275                  * again. In order to avoid that, we don't collect Hebrew/
 276                  * Arabic characters, but rather paint them one at a time.
 277                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 278                  */
 279                 if (hebrew)
 280                         break;
 281
 282                 /* FIXME: these checks are irrelevant, since 'arabic' and
 283                  * 'hebrew' alone are already going to trigger a break.
 284                  * However, this should not be removed completely, because
 285                  * if an alternative solution is found which allows grouping
 286                  * of arabic and hebrew characters, then these breaks may have
 287                  * to be re-applied.
 288
 289                 if (arabic && Encodings::isComposeChar_arabic(c))
 290                         break;
 291
 292                 if (hebrew && Encodings::isComposeChar_hebrew(c))
 293                         break;
 294                 */
 295
 296                 if (arabic) {
 297                         if (c == '(')
 298                                 c = ')';
 299                         else if (c == ')')
 300                                 c = '(';
 301                         c = par_.transformChar(c, pos);
 302                         /* see comment in hebrew, explaining why we break */
 303                         break;
 304                 }
 305
 306                 str.push_back(c);
 307         }
 308
 309         docstring s(&str[0], str.size());
 310
 311         if (prev_change != Change::UNCHANGED) {
 312                 FontInfo copy = font;
 313                 if (prev_change == Change::DELETED) {
 314                         copy.setColor(Color_deletedtext);
 315                 } else if (prev_change == Change::INSERTED) {
 316                         copy.setColor(Color_addedtext);
 317                 }
 318                 x_ += pi_.pain.text(int(x_), yo_, s, copy);
 319         } else {
 320                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 321         }
 322 }
 323
 324
 325 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 326                 int desc)
 327 {
 328         if (!lyxrc.mark_foreign_language)
 329                 return;
 330         if (lang == latex_language)
 331                 return;
 332         if (lang == pi_.base.bv->buffer().params().language)
 333                 return;
 334
 335         int const y = yo_ + 1 + desc;
 336         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 337 }
 338
 339
 340 void RowPainter::paintFromPos(pos_type & vpos)
 341 {
 342         pos_type const pos = bidi_.vis2log(vpos);
 343         Font const orig_font = text_metrics_.getDisplayFont(pit_, pos);
 344         double const orig_x = x_;
 345
 346         // usual characters, no insets
 347         char_type const c = par_.getChar(pos);
 348
 349         // special case languages
 350         string const & lang = orig_font.language()->lang();
 351         bool const hebrew = lang == "hebrew";
 352         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 353                                                 lang == "farsi";
 354
 355         // draw as many chars as we can
 356         if ((!hebrew && !arabic)
 357                 || (hebrew && !Encodings::isComposeChar_hebrew(c))
 358                 || (arabic && !Encodings::isComposeChar_arabic(c))) {
 359                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 360         } else if (hebrew) {
 361                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 362         } else if (arabic) {
 363                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 364         }
 365
 366         paintForeignMark(orig_x, orig_font.language());
 367 }
 368
 369
 370 void RowPainter::paintChangeBar()
 371 {
 372         pos_type const start = row_.pos();
 373         pos_type end = row_.endpos();
 374
 375         if (par_.size() == end) {
 376                 // this is the last row of the paragraph;
 377                 // thus, we must also consider the imaginary end-of-par character
 378                 end++;
 379         }
 380
 381         if (start == end || !par_.isChanged(start, end))
 382                 return;
 383
 384         int const height = text_metrics_.isLastRow(pit_, row_)
 385                 ? row_.ascent()
 386                 : row_.height();
 387
 388         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 389 }
 390
 391
 392 void RowPainter::paintAppendix()
 393 {
 394         // only draw the appendix frame once (for the main text)
 395         if (!par_.params().appendix() || !text_.isMainText(pi_.base.bv->buffer()))
 396                 return;
 397
 398         int y = yo_ - row_.ascent();
 399
 400         if (par_.params().startOfAppendix())
 401                 y += 2 * defaultRowHeight();
 402
 403         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 404         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 405 }
 406
 407
 408 void RowPainter::paintDepthBar()
 409 {
 410         depth_type const depth = par_.getDepth();
 411
 412         if (depth <= 0)
 413                 return;
 414
 415         depth_type prev_depth = 0;
 416         if (!text_metrics_.isFirstRow(pit_, row_)) {
 417                 pit_type pit2 = pit_;
 418                 if (row_.pos() == 0)
 419                         --pit2;
 420                 prev_depth = pars_[pit2].getDepth();
 421         }
 422
 423         depth_type next_depth = 0;
 424         if (!text_metrics_.isLastRow(pit_, row_)) {
 425                 pit_type pit2 = pit_;
 426                 if (row_.endpos() >= pars_[pit2].size())
 427                         ++pit2;
 428                 next_depth = pars_[pit2].getDepth();
 429         }
 430
 431         for (depth_type i = 1; i <= depth; ++i) {
 432                 int const w = nestMargin() / 5;
 433                 int x = int(xo_) + w * i;
 434                 // only consider the changebar space if we're drawing outermost text
 435                 if (text_.isMainText(pi_.base.bv->buffer()))
 436                         x += changebarMargin();
 437
 438                 int const starty = yo_ - row_.ascent();
 439                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 440
 441                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 442
 443                 if (i > prev_depth)
 444                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 445                 if (i > next_depth)
 446                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 447         }
 448 }
 449
 450
 451 int RowPainter::paintAppendixStart(int y)
 452 {
 453         FontInfo pb_font = sane_font;
 454         pb_font.setColor(Color_appendix);
 455         pb_font.decSize();
 456
 457         int w = 0;
 458         int a = 0;
 459         int d = 0;
 460
 461         docstring const label = _("Appendix");
 462         theFontMetrics(pb_font).rectText(label, w, a, d);
 463
 464         int const text_start = int(xo_ + (width_ - w) / 2);
 465         int const text_end = text_start + w;
 466
 467         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 468
 469         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 470         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 471
 472         return 3 * defaultRowHeight();
 473 }
 474
 475
 476 void RowPainter::paintFirst()
 477 {
 478         ParagraphParameters const & parparams = par_.params();
 479
 480         int y_top = 0;
 481
 482         // start of appendix?
 483         if (parparams.startOfAppendix())
 484                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 485
 486         Buffer const & buffer = pi_.base.bv->buffer();
 487
 488         LayoutPtr const & layout = par_.layout();
 489
 490         if (buffer.params().paragraph_separation == BufferParams::PARSEP_SKIP) {
 491                 if (pit_ != 0) {
 492                         if (layout->latextype == LATEX_PARAGRAPH
 493                                 && !par_.getDepth()) {
 494                                 y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 495                         } else {
 496                                 LayoutPtr const & playout = pars_[pit_ - 1].layout();
 497                                 if (playout->latextype == LATEX_PARAGRAPH
 498                                         && !pars_[pit_ - 1].getDepth()) {
 499                                         // is it right to use defskip here, too? (AS)
 500                                         y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 501                                 }
 502                         }
 503                 }
 504         }
 505
 506         bool const is_rtl = text_.isRTL(buffer, par_);
 507         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 508         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 509
 510         // should we print a label?
 511         if (layout->labeltype >= LABEL_STATIC
 512             && (layout->labeltype != LABEL_STATIC
 513                       || layout->latextype != LATEX_ENVIRONMENT
 514                       || is_seq)) {
 515
 516                 FontInfo const font = getLabelFont();
 517                 FontMetrics const & fm = theFontMetrics(font);
 518
 519                 docstring const str = par_.getLabelstring();
 520                 if (!str.empty()) {
 521                         double x = x_;
 522
 523                         // this is special code for the chapter layout. This is
 524                         // printed in an extra row and has a pagebreak at
 525                         // the top.
 526                         if (layout->counter == "chapter") {
 527                                 double spacing_val = 1.0;
 528                                 if (!parparams.spacing().isDefault()) {
 529                                         spacing_val = parparams.spacing().getValue();
 530                                 } else {
 531                                         spacing_val = buffer.params().spacing().getValue();
 532                                 }
 533
 534                                 int const labeladdon = int(fm.maxHeight() * layout->spacing.getValue() * spacing_val);
 535
 536                                 int const maxdesc = int(fm.maxDescent() * layout->spacing.getValue() * spacing_val)
 537                                         + int(layout->parsep) * defaultRowHeight();
 538
 539                                 if (is_rtl) {
 540                                         x = width_ - leftMargin() -
 541                                                 fm.width(str);
 542                                 }
 543
 544                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 545                         } else {
 546                                 if (is_rtl) {
 547                                         x = width_ - leftMargin()
 548                                                 + fm.width(layout->labelsep);
 549                                 } else {
 550                                         x = x_ - fm.width(layout->labelsep)
 551                                                 - fm.width(str);
 552                                 }
 553
 554                                 pi_.pain.text(int(x), yo_, str, font);
 555                         }
 556                 }
 557
 558         // the labels at the top of an environment.
 559         // More or less for bibliography
 560         } else if (is_seq &&
 561                 (layout->labeltype == LABEL_TOP_ENVIRONMENT ||
 562                 layout->labeltype == LABEL_BIBLIO ||
 563                 layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 564                 FontInfo const font = getLabelFont();
 565                 if (!par_.getLabelstring().empty()) {
 566                         docstring const str = par_.getLabelstring();
 567                         double spacing_val = 1.0;
 568                         if (!parparams.spacing().isDefault())
 569                                 spacing_val = parparams.spacing().getValue();
 570                         else
 571                                 spacing_val = buffer.params().spacing().getValue();
 572
 573                         FontMetrics const & fm = theFontMetrics(font);
 574
 575                         int const labeladdon = int(fm.maxHeight()
 576                                 * layout->spacing.getValue() * spacing_val);
 577
 578                         int maxdesc =
 579                                 int(fm.maxDescent() * layout->spacing.getValue() * spacing_val
 580                                 + (layout->labelbottomsep * defaultRowHeight()));
 581
 582                         double x = x_;
 583                         if (layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 584                                 if (is_rtl)
 585                                         x = leftMargin();
 586                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 587                                 x -= fm.width(str) / 2;
 588                         } else if (is_rtl) {
 589                                 x = width_ - leftMargin() -     fm.width(str);
 590                         }
 591                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 592                 }
 593         }
 594 }
 595
 596
 597 void RowPainter::paintLast()
 598 {
 599         bool const is_rtl = text_.isRTL(pi_.base.bv->buffer(), par_);
 600         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 601
 602         // paint imaginary end-of-paragraph character
 603
 604         if (par_.isInserted(par_.size()) || par_.isDeleted(par_.size())) {
 605                 FontMetrics const & fm = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 606                 int const length = fm.maxAscent() / 2;
 607                 ColorCode col = par_.isInserted(par_.size()) ? Color_addedtext : Color_deletedtext;
 608
 609                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 610                            Painter::line_solid, Painter::line_thick);
 611                 pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1, yo_ + 2, col,
 612                            Painter::line_solid, Painter::line_thick);
 613         }
 614
 615         // draw an endlabel
 616
 617         switch (endlabel) {
 618         case END_LABEL_BOX:
 619         case END_LABEL_FILLED_BOX: {
 620                 FontInfo const font = getLabelFont();
 621                 FontMetrics const & fm = theFontMetrics(font);
 622                 int const size = int(0.75 * fm.maxAscent());
 623                 int const y = yo_ - size;
 624                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 625                 int x = is_rtl ? nestMargin() + changebarMargin()
 626                         : max_row_width - text_metrics_.rightMargin(pm_);
 627
 628                 // If needed, move the box a bit to avoid overlapping with text.
 629                 int const rem = max_row_width - row_.width();
 630                 if (rem <= 0)
 631                         x += is_rtl ? rem : - rem;
 632
 633                 if (endlabel == END_LABEL_BOX)
 634                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 635                 else
 636                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 637                 break;
 638         }
 639
 640         case END_LABEL_STATIC: {
 641                 FontInfo const font = getLabelFont();
 642                 FontMetrics const & fm = theFontMetrics(font);
 643                 docstring const & str = par_.layout()->endlabelstring();
 644                 double const x = is_rtl ?
 645                         x_ - fm.width(str)
 646                         : - text_metrics_.rightMargin(pm_) - row_.width();
 647                 pi_.pain.text(int(x), yo_, str, font);
 648                 break;
 649         }
 650
 651         case END_LABEL_NO_LABEL:
 652                 break;
 653         }
 654 }
 655
 656
 657 void RowPainter::paintOnlyInsets()
 658 {
 659         pos_type const end = row_.endpos();
 660         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 661                 // If outer row has changed, nested insets are repaint completely.
 662                 Inset const * inset = par_.getInset(pos);
 663                 if (!inset)
 664                         continue;
 665                 if (x_ > pi_.base.bv->workWidth())
 666                         continue;
 667                 x_ = pi_.base.bv->coordCache().getInsets().x(inset);
 668                 paintInset(inset, pos);
 669         }
 670 }
 671
 672
 673 void RowPainter::paintText()
 674 {
 675         pos_type const end = row_.endpos();
 676         // Spaces at logical line breaks in bidi text must be skipped during
 677         // painting. However, they may appear visually in the middle
 678         // of a row; they must be skipped, wherever they are...
 679         // * logically "abc_[HEBREW_\nHEBREW]"
 680         // * visually "abc_[_WERBEH\nWERBEH]"
 681         pos_type skipped_sep_vpos = -1;
 682         pos_type body_pos = par_.beginOfBody();
 683         if (body_pos > 0 &&
 684                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 685                 body_pos = 0;
 686         }
 687
 688         LayoutPtr const & layout = par_.layout();
 689
 690         bool running_strikeout = false;
 691         bool is_struckout = false;
 692         int last_strikeout_x = 0;
 693
 694         // Use font span to speed things up, see below
 695         FontSpan font_span;
 696         Font font;
 697
 698         // If the last logical character is a separator, don't paint it, unless
 699         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 700         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 701                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 702
 703         for (pos_type vpos = row_.pos(); vpos < end; ) {
 704                 if (x_ > pi_.base.bv->workWidth())
 705                         break;
 706
 707                 // Skip the separator at the logical end of the row
 708                 if (vpos == skipped_sep_vpos) {
 709                         ++vpos;
 710                         continue;
 711                 }
 712
 713                 pos_type const pos = bidi_.vis2log(vpos);
 714
 715                 if (pos >= par_.size()) {
 716                         ++vpos;
 717                         continue;
 718                 }
 719
 720                 // Use font span to speed things up, see above
 721                 if (vpos < font_span.first || vpos > font_span.last) {
 722                         font_span = par_.fontSpan(vpos);
 723                         font = text_metrics_.getDisplayFont(pit_, vpos);
 724
 725                         // split font span if inline completion is inside
 726                         if (font_span.first <= inlineCompletionVPos_
 727                             && font_span.last > inlineCompletionVPos_)
 728                                 font_span.last = inlineCompletionVPos_;
 729                 }
 730
 731                 const int width_pos = pm_.singleWidth(pos, font);
 732
 733                 if (x_ + width_pos < 0) {
 734                         x_ += width_pos;
 735                         ++vpos;
 736                         continue;
 737                 }
 738
 739                 is_struckout = par_.isDeleted(pos);
 740
 741                 if (is_struckout && !running_strikeout) {
 742                         running_strikeout = true;
 743                         last_strikeout_x = int(x_);
 744                 }
 745
 746                 Inset const * inset = par_.getInset(pos);
 747                 bool const highly_editable_inset = inset
 748                         && inset->editable() == Inset::HIGHLY_EDITABLE;
 749
 750                 // If we reach the end of a struck out range, paint it.
 751                 // We also don't paint across things like tables
 752                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 753                         // Calculate 1/3 height of the buffer's default font
 754                         FontMetrics const & fm
 755                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 756                         int const middle = yo_ - fm.maxAscent() / 3;
 757                         pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 758                                 Color_deletedtext, Painter::line_solid, Painter::line_thin);
 759                         running_strikeout = false;
 760                 }
 761
 762                 if (body_pos > 0 && pos == body_pos - 1) {
 763                         int const lwidth = theFontMetrics(getLabelFont())
 764                                 .width(layout->labelsep);
 765
 766                         x_ += row_.label_hfill + lwidth - width_pos;
 767                 }
 768
 769                 // Is the inline completion in front of character?
 770                 if (font.isRightToLeft() && vpos == inlineCompletionVPos_)
 771                         paintInlineCompletion(font);
 772
 773                 if (par_.isSeparator(pos)) {
 774                         Font const orig_font = text_metrics_.getDisplayFont(pit_, pos);
 775                         double const orig_x = x_;
 776                         x_ += width_pos;
 777                         if (pos >= body_pos)
 778                                 x_ += row_.separator;
 779                         paintForeignMark(orig_x, orig_font.language());
 780                         ++vpos;
 781
 782                 } else if (inset) {
 783                         // If outer row has changed, nested insets are repaint completely.
 784                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 785                         paintInset(inset, pos);
 786                         ++vpos;
 787
 788                 } else {
 789                         // paint as many characters as possible.
 790                         paintFromPos(vpos);
 791                 }
 792
 793                 // Is the inline completion after character?
 794                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos_)
 795                         paintInlineCompletion(font);
 796         }
 797
 798         // if we reach the end of a struck out range, paint it
 799         if (running_strikeout) {
 800                 // calculate 1/3 height of the buffer's default font
 801                 FontMetrics const & fm
 802                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 803                 int const middle = yo_ - fm.maxAscent() / 3;
 804                 pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 805                         Color_deletedtext, Painter::line_solid, Painter::line_thin);
 806                 running_strikeout = false;
 807         }
 808 }
 809
 810
 811 void RowPainter::paintInlineCompletion(Font const & font)
 812 {
 813         docstring completion = pi_.base.bv->inlineCompletion();
 814         FontInfo f = font.fontInfo();
 815
 816         // right to left?
 817         if (font.isRightToLeft())
 818                 reverse(completion.begin(), completion.end());
 819
 820         // draw the unique and the non-unique completion part
 821         // Note: this is not time-critical as it is
 822         // only done once per screen.
 823         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 824         docstring s1 = completion.substr(0, uniqueTo);
 825         docstring s2 = completion.substr(uniqueTo);
 826
 827         if (s1.size() > 0) {
 828                 f.setColor(Color_inlinecompletion);
 829                 pi_.pain.text(x_, yo_, s1, f);
 830                 x_ += theFontMetrics(font).width(s1);
 831         }
 832
 833         if (s2.size() > 0) {
 834                 f.setColor(Color_nonunique_inlinecompletion);
 835                 pi_.pain.text(x_, yo_, s2, f);
 836                 x_ += theFontMetrics(font).width(s2);
 837         }
 838 }
 839
 840 } // namespace lyx