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         pos_type const end = row_.endpos();
 228         FontSpan const font_span = par_.fontSpan(pos);
 229         Change::Type const prev_change = par_.lookupChange(pos).type;
 230
 231         // first character
 232         vector<char_type> str;
 233         str.reserve(100);
 234         str.push_back(par_.getChar(pos));
 235
 236         if (arabic) {
 237                 char_type c = str[0];
 238                 if (c == '(')
 239                         c = ')';
 240                 else if (c == ')')
 241                         c = '(';
 242                 str[0] = par_.transformChar(c, pos);
 243         }
 244
 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 (selection != new_selection)
 256                         break;
 257
 258                 if (prev_change != par_.lookupChange(pos).type)
 259                         break;
 260
 261                 char_type c = par_.getChar(pos);
 262
 263                 if (!isPrintableNonspace(c))
 264                         break;
 265
 266                 /* Because we do our own bidi, at this point the strings are
 267                  * already in visual order. However, Qt also applies its own
 268                  * bidi algorithm to strings that it paints to the screen.
 269                  * Therefore, if we were to paint Hebrew/Arabic words as a
 270                  * single string, the letters in the words would get reversed
 271                  * again. In order to avoid that, we don't collect Hebrew/
 272                  * Arabic characters, but rather paint them one at a time.
 273                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 274                  */
 275                 if (hebrew)
 276                         break;
 277
 278                 /* FIXME: these checks are irrelevant, since 'arabic' and
 279                  * 'hebrew' alone are already going to trigger a break.
 280                  * However, this should not be removed completely, because
 281                  * if an alternative solution is found which allows grouping
 282                  * of arabic and hebrew characters, then these breaks may have
 283                  * to be re-applied.
 284
 285                 if (arabic && Encodings::isArabicComposeChar(c))
 286                         break;
 287
 288                 if (hebrew && Encodings::isHebrewComposeChar(c))
 289                         break;
 290                 */
 291
 292                 if (arabic) {
 293                         if (c == '(')
 294                                 c = ')';
 295                         else if (c == ')')
 296                                 c = '(';
 297                         c = par_.transformChar(c, pos);
 298                         /* see comment in hebrew, explaining why we break */
 299                         break;
 300                 }
 301
 302                 str.push_back(c);
 303         }
 304
 305         docstring s(&str[0], str.size());
 306
 307         if (!selection && prev_change == Change::UNCHANGED) {
 308                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 309                 return;
 310         }
 311
 312         FontInfo copy = font;
 313         if (selection)
 314                 copy.setColor(Color_selectiontext);
 315         else if (prev_change == Change::DELETED)
 316                 copy.setColor(Color_deletedtext);
 317         else if (prev_change == Change::INSERTED)
 318                 copy.setColor(Color_addedtext);
 319
 320         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 321 }
 322
 323
 324 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 325                 int desc)
 326 {
 327         if (!lyxrc.mark_foreign_language)
 328                 return;
 329         if (lang == latex_language)
 330                 return;
 331         if (lang == pi_.base.bv->buffer().params().language)
 332                 return;
 333
 334         int const y = yo_ + 1 + desc;
 335         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 336 }
 337
 338
 339 void RowPainter::paintFromPos(pos_type & vpos)
 340 {
 341         pos_type const pos = bidi_.vis2log(vpos);
 342         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 343         double const orig_x = x_;
 344
 345         // usual characters, no insets
 346         char_type const c = par_.getChar(pos);
 347
 348         // special case languages
 349         string const & lang = orig_font.language()->lang();
 350         bool const hebrew = lang == "hebrew";
 351         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 352                                                 lang == "farsi";
 353
 354         // draw as many chars as we can
 355         if ((!hebrew && !arabic)
 356                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 357                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 358                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 359         } else if (hebrew) {
 360                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 361         } else if (arabic) {
 362                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 363         }
 364
 365         paintForeignMark(orig_x, orig_font.language());
 366 }
 367
 368
 369 void RowPainter::paintChangeBar()
 370 {
 371         pos_type const start = row_.pos();
 372         pos_type end = row_.endpos();
 373
 374         if (par_.size() == end) {
 375                 // this is the last row of the paragraph;
 376                 // thus, we must also consider the imaginary end-of-par character
 377                 end++;
 378         }
 379
 380         if (start == end || !par_.isChanged(start, end))
 381                 return;
 382
 383         int const height = text_metrics_.isLastRow(pit_, row_)
 384                 ? row_.ascent()
 385                 : row_.height();
 386
 387         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 388 }
 389
 390
 391 void RowPainter::paintAppendix()
 392 {
 393         // only draw the appendix frame once (for the main text)
 394         if (!par_.params().appendix() || !text_.isMainText(pi_.base.bv->buffer()))
 395                 return;
 396
 397         int y = yo_ - row_.ascent();
 398
 399         if (par_.params().startOfAppendix())
 400                 y += 2 * defaultRowHeight();
 401
 402         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 403         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 404 }
 405
 406
 407 void RowPainter::paintDepthBar()
 408 {
 409         depth_type const depth = par_.getDepth();
 410
 411         if (depth <= 0)
 412                 return;
 413
 414         depth_type prev_depth = 0;
 415         if (!text_metrics_.isFirstRow(pit_, row_)) {
 416                 pit_type pit2 = pit_;
 417                 if (row_.pos() == 0)
 418                         --pit2;
 419                 prev_depth = pars_[pit2].getDepth();
 420         }
 421
 422         depth_type next_depth = 0;
 423         if (!text_metrics_.isLastRow(pit_, row_)) {
 424                 pit_type pit2 = pit_;
 425                 if (row_.endpos() >= pars_[pit2].size())
 426                         ++pit2;
 427                 next_depth = pars_[pit2].getDepth();
 428         }
 429
 430         for (depth_type i = 1; i <= depth; ++i) {
 431                 int const w = nestMargin() / 5;
 432                 int x = int(xo_) + w * i;
 433                 // only consider the changebar space if we're drawing outermost text
 434                 if (text_.isMainText(pi_.base.bv->buffer()))
 435                         x += changebarMargin();
 436
 437                 int const starty = yo_ - row_.ascent();
 438                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 439
 440                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 441
 442                 if (i > prev_depth)
 443                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 444                 if (i > next_depth)
 445                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 446         }
 447 }
 448
 449
 450 int RowPainter::paintAppendixStart(int y)
 451 {
 452         FontInfo pb_font = sane_font;
 453         pb_font.setColor(Color_appendix);
 454         pb_font.decSize();
 455
 456         int w = 0;
 457         int a = 0;
 458         int d = 0;
 459
 460         docstring const label = _("Appendix");
 461         theFontMetrics(pb_font).rectText(label, w, a, d);
 462
 463         int const text_start = int(xo_ + (width_ - w) / 2);
 464         int const text_end = text_start + w;
 465
 466         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 467
 468         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 469         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 470
 471         return 3 * defaultRowHeight();
 472 }
 473
 474
 475 void RowPainter::paintFirst()
 476 {
 477         ParagraphParameters const & parparams = par_.params();
 478
 479         int y_top = 0;
 480
 481         // start of appendix?
 482         if (parparams.startOfAppendix())
 483                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 484
 485         Buffer const & buffer = pi_.base.bv->buffer();
 486         Layout const & layout = par_.layout();
 487
 488         if (buffer.params().paragraph_separation == BufferParams::ParagraphSkipSeparation) {
 489                 if (pit_ != 0) {
 490                         if (layout.latextype == LATEX_PARAGRAPH
 491                                 && !par_.getDepth()) {
 492                                 y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 493                         } else {
 494                                 Layout const & playout = pars_[pit_ - 1].layout();
 495                                 if (playout.latextype == LATEX_PARAGRAPH
 496                                         && !pars_[pit_ - 1].getDepth()) {
 497                                         // is it right to use defskip here, too? (AS)
 498                                         y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 499                                 }
 500                         }
 501                 }
 502         }
 503
 504         bool const is_rtl = text_.isRTL(buffer, par_);
 505         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 506         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 507
 508         // should we print a label?
 509         if (layout.labeltype >= LABEL_STATIC
 510             && (layout.labeltype != LABEL_STATIC
 511                       || layout.latextype != LATEX_ENVIRONMENT
 512                       || is_seq)) {
 513
 514                 FontInfo const font = labelFont();
 515                 FontMetrics const & fm = theFontMetrics(font);
 516
 517                 docstring const str = par_.labelString();
 518                 if (!str.empty()) {
 519                         double x = x_;
 520
 521                         // this is special code for the chapter layout. This is
 522                         // printed in an extra row and has a pagebreak at
 523                         // the top.
 524                         if (layout.counter == "chapter") {
 525                                 double spacing_val = 1.0;
 526                                 if (!parparams.spacing().isDefault()) {
 527                                         spacing_val = parparams.spacing().getValue();
 528                                 } else {
 529                                         spacing_val = buffer.params().spacing().getValue();
 530                                 }
 531
 532                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 533
 534                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 535                                         + int(layout.parsep) * defaultRowHeight();
 536
 537                                 if (is_rtl) {
 538                                         x = width_ - leftMargin() -
 539                                                 fm.width(str);
 540                                 }
 541
 542                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 543                         } else {
 544                                 if (is_rtl) {
 545                                         x = width_ - leftMargin()
 546                                                 + fm.width(layout.labelsep);
 547                                 } else {
 548                                         x = x_ - fm.width(layout.labelsep)
 549                                                 - fm.width(str);
 550                                 }
 551
 552                                 pi_.pain.text(int(x), yo_, str, font);
 553                         }
 554                 }
 555
 556         // the labels at the top of an environment.
 557         // More or less for bibliography
 558         } else if (is_seq &&
 559                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 560                 layout.labeltype == LABEL_BIBLIO ||
 561                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 562                 FontInfo const font = labelFont();
 563                 docstring const str = par_.labelString();
 564                 if (!str.empty()) {
 565                         double spacing_val = 1.0;
 566                         if (!parparams.spacing().isDefault())
 567                                 spacing_val = parparams.spacing().getValue();
 568                         else
 569                                 spacing_val = buffer.params().spacing().getValue();
 570
 571                         FontMetrics const & fm = theFontMetrics(font);
 572
 573                         int const labeladdon = int(fm.maxHeight()
 574                                 * layout.spacing.getValue() * spacing_val);
 575
 576                         int maxdesc =
 577                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 578                                 + (layout.labelbottomsep * defaultRowHeight()));
 579
 580                         double x = x_;
 581                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 582                                 if (is_rtl)
 583                                         x = leftMargin();
 584                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 585                                 x -= fm.width(str) / 2;
 586                         } else if (is_rtl) {
 587                                 x = width_ - leftMargin() -     fm.width(str);
 588                         }
 589                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 590                 }
 591         }
 592 }
 593
 594
 595 void RowPainter::paintLast()
 596 {
 597         bool const is_rtl = text_.isRTL(pi_.base.bv->buffer(), par_);
 598         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 599
 600         // paint imaginary end-of-paragraph character
 601
 602         if (par_.isInserted(par_.size()) || par_.isDeleted(par_.size())) {
 603                 FontMetrics const & fm = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 604                 int const length = fm.maxAscent() / 2;
 605                 ColorCode col = par_.isInserted(par_.size()) ? Color_addedtext : Color_deletedtext;
 606
 607                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 608                            Painter::line_solid, Painter::line_thick);
 609                 pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1, yo_ + 2, col,
 610                            Painter::line_solid, Painter::line_thick);
 611         }
 612
 613         // draw an endlabel
 614
 615         switch (endlabel) {
 616         case END_LABEL_BOX:
 617         case END_LABEL_FILLED_BOX: {
 618                 FontInfo const font = labelFont();
 619                 FontMetrics const & fm = theFontMetrics(font);
 620                 int const size = int(0.75 * fm.maxAscent());
 621                 int const y = yo_ - size;
 622                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 623                 int x = is_rtl ? nestMargin() + changebarMargin()
 624                         : max_row_width - text_metrics_.rightMargin(pm_);
 625
 626                 // If needed, move the box a bit to avoid overlapping with text.
 627                 int const rem = max_row_width - row_.width();
 628                 if (rem <= 0)
 629                         x += is_rtl ? rem : - rem;
 630
 631                 if (endlabel == END_LABEL_BOX)
 632                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 633                 else
 634                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 635                 break;
 636         }
 637
 638         case END_LABEL_STATIC: {
 639                 FontInfo const font = labelFont();
 640                 FontMetrics const & fm = theFontMetrics(font);
 641                 docstring const & str = par_.layout().endlabelstring();
 642                 double const x = is_rtl ?
 643                         x_ - fm.width(str)
 644                         : - text_metrics_.rightMargin(pm_) - row_.width();
 645                 pi_.pain.text(int(x), yo_, str, font);
 646                 break;
 647         }
 648
 649         case END_LABEL_NO_LABEL:
 650                 break;
 651         }
 652 }
 653
 654
 655 void RowPainter::paintOnlyInsets()
 656 {
 657         pos_type const end = row_.endpos();
 658         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 659                 // If outer row has changed, nested insets are repaint completely.
 660                 Inset const * inset = par_.getInset(pos);
 661                 if (!inset)
 662                         continue;
 663                 if (x_ > pi_.base.bv->workWidth())
 664                         continue;
 665                 x_ = pi_.base.bv->coordCache().getInsets().x(inset);
 666                 paintInset(inset, pos);
 667         }
 668 }
 669
 670
 671 void RowPainter::paintText()
 672 {
 673         pos_type const end = row_.endpos();
 674         // Spaces at logical line breaks in bidi text must be skipped during
 675         // painting. However, they may appear visually in the middle
 676         // of a row; they must be skipped, wherever they are...
 677         // * logically "abc_[HEBREW_\nHEBREW]"
 678         // * visually "abc_[_WERBEH\nWERBEH]"
 679         pos_type skipped_sep_vpos = -1;
 680         pos_type body_pos = par_.beginOfBody();
 681         if (body_pos > 0 &&
 682                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 683                 body_pos = 0;
 684         }
 685
 686         Layout const & layout = par_.layout();
 687
 688         bool running_strikeout = false;
 689         bool is_struckout = false;
 690         int last_strikeout_x = 0;
 691
 692         // check for possible inline completion
 693         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 694         pos_type inlineCompletionVPos = -1;
 695         if (inlineCompletionPos.inTexted()
 696             && inlineCompletionPos.text() == &text_
 697             && inlineCompletionPos.pit() == pit_
 698             && inlineCompletionPos.pos() - 1 >= row_.pos()
 699             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 700                 // draw logically behind the previous character
 701                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 702         }
 703
 704         // Use font span to speed things up, see below
 705         FontSpan font_span;
 706         Font font;
 707
 708         // If the last logical character is a separator, don't paint it, unless
 709         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 710         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 711                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 712
 713         for (pos_type vpos = row_.pos(); vpos < end; ) {
 714                 if (x_ > pi_.base.bv->workWidth())
 715                         break;
 716
 717                 // Skip the separator at the logical end of the row
 718                 if (vpos == skipped_sep_vpos) {
 719                         ++vpos;
 720                         continue;
 721                 }
 722
 723                 pos_type const pos = bidi_.vis2log(vpos);
 724
 725                 if (pos >= par_.size()) {
 726                         ++vpos;
 727                         continue;
 728                 }
 729
 730                 // Use font span to speed things up, see above
 731                 if (vpos < font_span.first || vpos > font_span.last) {
 732                         font_span = par_.fontSpan(vpos);
 733                         font = text_metrics_.displayFont(pit_, vpos);
 734
 735                         // split font span if inline completion is inside
 736                         if (font_span.first <= inlineCompletionVPos
 737                             && font_span.last > inlineCompletionVPos)
 738                                 font_span.last = inlineCompletionVPos;
 739                 }
 740
 741                 const int width_pos = pm_.singleWidth(pos, font);
 742
 743                 if (x_ + width_pos < 0) {
 744                         x_ += width_pos;
 745                         ++vpos;
 746                         continue;
 747                 }
 748
 749                 is_struckout = par_.isDeleted(pos);
 750
 751                 if (is_struckout && !running_strikeout) {
 752                         running_strikeout = true;
 753                         last_strikeout_x = int(x_);
 754                 }
 755
 756                 Inset const * inset = par_.getInset(pos);
 757                 bool const highly_editable_inset = inset
 758                         && inset->editable() == Inset::HIGHLY_EDITABLE;
 759
 760                 // If we reach the end of a struck out range, paint it.
 761                 // We also don't paint across things like tables
 762                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 763                         // Calculate 1/3 height of the buffer's default font
 764                         FontMetrics const & fm
 765                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 766                         int const middle = yo_ - fm.maxAscent() / 3;
 767                         pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 768                                 Color_deletedtext, Painter::line_solid, Painter::line_thin);
 769                         running_strikeout = false;
 770                 }
 771
 772                 if (body_pos > 0 && pos == body_pos - 1) {
 773                         int const lwidth = theFontMetrics(labelFont())
 774                                 .width(layout.labelsep);
 775
 776                         x_ += row_.label_hfill + lwidth - width_pos;
 777                 }
 778
 779                 // Is the inline completion in front of character?
 780                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 781                         paintInlineCompletion(font);
 782
 783                 if (par_.isSeparator(pos)) {
 784                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 785                         double const orig_x = x_;
 786                         x_ += width_pos;
 787                         if (pos >= body_pos)
 788                                 x_ += row_.separator;
 789                         paintForeignMark(orig_x, orig_font.language());
 790                         ++vpos;
 791
 792                 } else if (inset) {
 793                         // If outer row has changed, nested insets are repaint completely.
 794                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 795                         paintInset(inset, pos);
 796                         ++vpos;
 797
 798                 } else {
 799                         // paint as many characters as possible.
 800                         paintFromPos(vpos);
 801                 }
 802
 803                 // Is the inline completion after character?
 804                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 805                         paintInlineCompletion(font);
 806         }
 807
 808         // if we reach the end of a struck out range, paint it
 809         if (running_strikeout) {
 810                 // calculate 1/3 height of the buffer's default font
 811                 FontMetrics const & fm
 812                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 813                 int const middle = yo_ - fm.maxAscent() / 3;
 814                 pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 815                         Color_deletedtext, Painter::line_solid, Painter::line_thin);
 816                 running_strikeout = false;
 817         }
 818 }
 819
 820
 821 void RowPainter::paintInlineCompletion(Font const & font)
 822 {
 823         docstring completion = pi_.base.bv->inlineCompletion();
 824         FontInfo f = font.fontInfo();
 825         bool rtl = font.isRightToLeft();
 826
 827         // draw the unique and the non-unique completion part
 828         // Note: this is not time-critical as it is
 829         // only done once per screen.
 830         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 831         docstring s1 = completion.substr(0, uniqueTo);
 832         docstring s2 = completion.substr(uniqueTo);
 833         ColorCode c1 = Color_inlinecompletion;
 834         ColorCode c2 = Color_nonunique_inlinecompletion;
 835
 836         // right to left?
 837         if (rtl) {
 838                 swap(s1, s2);
 839                 reverse(s1.begin(), s1.end());
 840                 reverse(s2.begin(), s2.end());
 841                 swap(c1, c2);
 842         }
 843
 844         if (s1.size() > 0) {
 845                 f.setColor(c1);
 846                 pi_.pain.text(int(x_), yo_, s1, f);
 847                 x_ += theFontMetrics(font).width(s1);
 848         }
 849
 850         if (s2.size() > 0) {
 851                 f.setColor(c2);
 852                 pi_.pain.text(int(x_), yo_, s2, f);
 853                 x_ += theFontMetrics(font).width(s2);
 854         }
 855 }
 856
 857 } // namespace lyx