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 "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 "ParagraphParameters.h"
  33 #include "TextMetrics.h"
  34 #include "VSpace.h"
  35
  36 #include "frontends/FontMetrics.h"
  37 #include "frontends/Painter.h"
  38
  39 #include "insets/InsetText.h"
  40
  41 #include "support/debug.h"
  42 #include "support/gettext.h"
  43 #include "support/textutils.h"
  44
  45 #include "support/lassert.h"
  46 #include <boost/crc.hpp>
  47
  48 using namespace std;
  49
  50 namespace lyx {
  51
  52 using frontend::Painter;
  53 using frontend::FontMetrics;
  54
  55 RowPainter::RowPainter(PainterInfo & pi,
  56         Text const & text, pit_type pit, Row const & row, Bidi & bidi, int x, int y)
  57         : pi_(pi), text_(text),
  58           text_metrics_(pi_.base.bv->textMetrics(&text)),
  59           pars_(text.paragraphs()),
  60           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  61           pm_(text_metrics_.parMetrics(pit)),
  62           bidi_(bidi), change_(pi_.change_),
  63           xo_(x), yo_(y), width_(text_metrics_.width())
  64 {
  65         bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
  66         x_ = row_.x + xo_;
  67
  68         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  69         //row_.dump();
  70
  71         LASSERT(pit >= 0, /**/);
  72         LASSERT(pit < int(text.paragraphs().size()), /**/);
  73 }
  74
  75
  76 FontInfo RowPainter::labelFont() const
  77 {
  78         return text_.labelFont(par_);
  79 }
  80
  81
  82 int RowPainter::leftMargin() const
  83 {
  84         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
  85                 row_.pos());
  86 }
  87
  88 // If you want to debug inset metrics uncomment the following line:
  89 //#define DEBUG_METRICS
  90 // This draws green lines around each inset.
  91
  92
  93 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
  94 {
  95         Font const font = text_metrics_.displayFont(pit_, pos);
  96
  97         LASSERT(inset, return);
  98         // Backup full_repaint status because some insets (InsetTabular)
  99         // requires a full repaint
 100         bool pi_full_repaint = pi_.full_repaint;
 101
 102         // FIXME: We should always use font, see documentation of
 103         // noFontChange() in Inset.h.
 104         pi_.base.font = inset->noFontChange() ?
 105                 pi_.base.bv->buffer().params().getFont().fontInfo() :
 106                 font.fontInfo();
 107         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 108         pi_.change_ = change_.changed() ? change_ : par_.lookupChange(pos);
 109
 110         int const x1 = int(x_);
 111         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 112         // insets are painted completely. Recursive
 113         inset->drawBackground(pi_, x1, yo_);
 114         inset->drawSelection(pi_, x1, yo_);
 115         inset->draw(pi_, x1, 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 x2 = x1 + dim.wid;
 128         int const y1 = yo_ + dim.des;
 129         int const y2 = yo_ - dim.asc;
 130         pi_.pain.line(x1, y1, x1, y2, Color_green);
 131         pi_.pain.line(x1, y1, x2, y1, Color_green);
 132         pi_.pain.line(x2, y1, x2, y2, Color_green);
 133         pi_.pain.line(x1, y2, x2, y2, Color_green);
 134 #endif
 135 }
 136
 137
 138 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 139 {
 140         pos_type pos = bidi_.vis2log(vpos);
 141
 142         docstring str;
 143
 144         // first char
 145         char_type c = par_.getChar(pos);
 146         str += c;
 147         ++vpos;
 148
 149         int const width = theFontMetrics(font).width(c);
 150         int dx = 0;
 151
 152         for (pos_type i = pos - 1; i >= 0; --i) {
 153                 c = par_.getChar(i);
 154                 if (!Encodings::isHebrewComposeChar(c)) {
 155                         if (isPrintableNonspace(c)) {
 156                                 int const width2 = pm_.singleWidth(i,
 157                                         text_metrics_.displayFont(pit_, i));
 158                                 dx = (c == 0x05e8 || // resh
 159                                       c == 0x05d3)   // dalet
 160                                         ? width2 - width
 161                                         : (width2 - width) / 2;
 162                         }
 163                         break;
 164                 }
 165         }
 166
 167         // Draw nikud
 168         pi_.pain.text(int(x_) + dx, yo_, str, font);
 169 }
 170
 171
 172 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 173 {
 174         pos_type pos = bidi_.vis2log(vpos);
 175         docstring str;
 176
 177         // first char
 178         char_type c = par_.getChar(pos);
 179         c = par_.transformChar(c, pos);
 180         str += c;
 181         ++vpos;
 182
 183         int const width = theFontMetrics(font).width(c);
 184         int dx = 0;
 185
 186         for (pos_type i = pos - 1; i >= 0; --i) {
 187                 c = par_.getChar(i);
 188                 if (!Encodings::isArabicComposeChar(c)) {
 189                         if (isPrintableNonspace(c)) {
 190                                 int const width2 = pm_.singleWidth(i,
 191                                                 text_metrics_.displayFont(pit_, i));
 192                                 dx = (width2 - width) / 2;
 193                         }
 194                         break;
 195                 }
 196         }
 197         // Draw nikud
 198         pi_.pain.text(int(x_) + dx, yo_, str, font);
 199 }
 200
 201
 202 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 203                             bool hebrew, bool arabic)
 204 {
 205         // This method takes up 70% of time when typing
 206         pos_type pos = bidi_.vis2log(vpos);
 207         // first character
 208         vector<char_type> str;
 209         str.reserve(100);
 210         str.push_back(par_.getChar(pos));
 211
 212         if (arabic) {
 213                 char_type c = str[0];
 214                 if (c == '(')
 215                         c = ')';
 216                 else if (c == ')')
 217                         c = '(';
 218                 str[0] = par_.transformChar(c, pos);
 219         }
 220
 221         pos_type const end = row_.endpos();
 222         FontSpan const font_span = par_.fontSpan(pos);
 223         // Track-change status.
 224         Change const & change_running = par_.lookupChange(pos);
 225
 226         // selected text?
 227         bool const selection = pos >= row_.sel_beg && pos < row_.sel_end;
 228
 229         char_type prev_char = ' ';
 230         // collect as much similar chars as we can
 231         for (++vpos ; vpos < end ; ++vpos) {
 232                 pos = bidi_.vis2log(vpos);
 233                 if (pos < font_span.first || pos > font_span.last)
 234                         break;
 235
 236                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 237                 if (new_selection != selection)
 238                         // Selection ends or starts here.
 239                         break;
 240
 241                 Change const & change = par_.lookupChange(pos);
 242                 if (!change_running.isSimilarTo(change))
 243                         // Track change type or author has changed.
 244                         break;
 245
 246                 char_type c = par_.getChar(pos);
 247
 248                 if (c == '\t' || prev_char == '\t') {
 249                         prev_char = c;
 250                         break;
 251                 }
 252
 253                 if (!isPrintableNonspace(c))
 254                         break;
 255
 256                 /* Because we do our own bidi, at this point the strings are
 257                  * already in visual order. However, Qt also applies its own
 258                  * bidi algorithm to strings that it paints to the screen.
 259                  * Therefore, if we were to paint Hebrew/Arabic words as a
 260                  * single string, the letters in the words would get reversed
 261                  * again. In order to avoid that, we don't collect Hebrew/
 262                  * Arabic characters, but rather paint them one at a time.
 263                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 264                  */
 265                 if (hebrew)
 266                         break;
 267
 268                 /* FIXME: these checks are irrelevant, since 'arabic' and
 269                  * 'hebrew' alone are already going to trigger a break.
 270                  * However, this should not be removed completely, because
 271                  * if an alternative solution is found which allows grouping
 272                  * of arabic and hebrew characters, then these breaks may have
 273                  * to be re-applied.
 274
 275                 if (arabic && Encodings::isArabicComposeChar(c))
 276                         break;
 277
 278                 if (hebrew && Encodings::isHebrewComposeChar(c))
 279                         break;
 280                 */
 281
 282                 if (arabic) {
 283                         if (c == '(')
 284                                 c = ')';
 285                         else if (c == ')')
 286                                 c = '(';
 287                         c = par_.transformChar(c, pos);
 288                         /* see comment in hebrew, explaining why we break */
 289                         break;
 290                 }
 291
 292                 str.push_back(c);
 293         }
 294
 295         docstring s(&str[0], str.size());
 296
 297         if (s[0] == '\t')
 298                 s.replace(0,1,from_ascii("    "));
 299
 300         if (!selection && !change_running.changed()) {
 301                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 302                 return;
 303         }
 304
 305         FontInfo copy = font;
 306         if (change_running.changed())
 307                 copy.setPaintColor(change_running.color());
 308         else if (selection)
 309                 copy.setPaintColor(Color_selectiontext);
 310
 311         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 312 }
 313
 314
 315 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 316                 int desc)
 317 {
 318         if (!lyxrc.mark_foreign_language)
 319                 return;
 320         if (lang == latex_language)
 321                 return;
 322         if (lang == pi_.base.bv->buffer().params().language)
 323                 return;
 324
 325         int const y = yo_ + 1 + desc;
 326         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 327 }
 328
 329
 330 void RowPainter::paintMisspelledMark(double orig_x, int desc)
 331 {
 332         int const y = yo_ + desc;
 333         pi_.pain.wavyHorizontalLine(int(orig_x), y, int(x_) - int(orig_x), Color_red);
 334 }
 335
 336
 337 void RowPainter::paintFromPos(pos_type & vpos)
 338 {
 339         pos_type const pos = bidi_.vis2log(vpos);
 340         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 341         double const orig_x = x_;
 342
 343         // usual characters, no insets
 344         char_type const c = par_.getChar(pos);
 345
 346         // special case languages
 347         string const & lang = orig_font.language()->lang();
 348         bool const hebrew = lang == "hebrew";
 349         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 350                                                 lang == "farsi";
 351
 352         // draw as many chars as we can
 353         if ((!hebrew && !arabic)
 354                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 355                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 356                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 357         } else if (hebrew) {
 358                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 359         } else if (arabic) {
 360                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 361         }
 362
 363         paintForeignMark(orig_x, orig_font.language());
 364
 365         if (orig_font.isMisspelled())
 366                 paintMisspelledMark(orig_x, 3);
 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())
 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())
 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         Layout const & layout = par_.layout();
 488
 489         if (buffer.params().paragraph_separation == BufferParams::ParagraphSkipSeparation) {
 490                 if (pit_ != 0) {
 491                         if (layout.latextype == LATEX_PARAGRAPH
 492                                 && !par_.getDepth()) {
 493                                 y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 494                         } else {
 495                                 Layout const & playout = pars_[pit_ - 1].layout();
 496                                 if (playout.latextype == LATEX_PARAGRAPH
 497                                         && !pars_[pit_ - 1].getDepth()) {
 498                                         // is it right to use defskip here, too? (AS)
 499                                         y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 500                                 }
 501                         }
 502                 }
 503         }
 504
 505         bool const is_rtl = text_.isRTL(par_);
 506         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 507         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 508
 509         // should we print a label?
 510         if (layout.labeltype >= LABEL_STATIC
 511             && (layout.labeltype != LABEL_STATIC
 512                       || layout.latextype != LATEX_ENVIRONMENT
 513                       || is_seq)) {
 514
 515                 FontInfo const font = labelFont();
 516                 FontMetrics const & fm = theFontMetrics(font);
 517
 518                 docstring const str = par_.labelString();
 519                 if (!str.empty()) {
 520                         double x = x_;
 521
 522                         // this is special code for the chapter layout. This is
 523                         // printed in an extra row and has a pagebreak at
 524                         // the top.
 525                         if (layout.counter == "chapter") {
 526                                 double spacing_val = 1.0;
 527                                 if (!parparams.spacing().isDefault()) {
 528                                         spacing_val = parparams.spacing().getValue();
 529                                 } else {
 530                                         spacing_val = buffer.params().spacing().getValue();
 531                                 }
 532
 533                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 534
 535                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 536                                         + int(layout.parsep) * defaultRowHeight();
 537
 538                                 if (is_rtl) {
 539                                         x = width_ - leftMargin() -
 540                                                 fm.width(str);
 541                                 }
 542
 543                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 544                         } else {
 545                                 if (is_rtl) {
 546                                         x = width_ - leftMargin()
 547                                                 + fm.width(layout.labelsep);
 548                                 } else {
 549                                         x = x_ - fm.width(layout.labelsep)
 550                                                 - fm.width(str);
 551                                 }
 552
 553                                 pi_.pain.text(int(x), yo_, str, font);
 554                         }
 555                 }
 556
 557         // the labels at the top of an environment.
 558         // More or less for bibliography
 559         } else if (is_seq &&
 560                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 561                 layout.labeltype == LABEL_BIBLIO ||
 562                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 563                 FontInfo const font = labelFont();
 564                 docstring const str = par_.labelString();
 565                 if (!str.empty()) {
 566                         double spacing_val = 1.0;
 567                         if (!parparams.spacing().isDefault())
 568                                 spacing_val = parparams.spacing().getValue();
 569                         else
 570                                 spacing_val = buffer.params().spacing().getValue();
 571
 572                         FontMetrics const & fm = theFontMetrics(font);
 573
 574                         int const labeladdon = int(fm.maxHeight()
 575                                 * layout.spacing.getValue() * spacing_val);
 576
 577                         int maxdesc =
 578                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 579                                 + (layout.labelbottomsep * defaultRowHeight()));
 580
 581                         double x = x_;
 582                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 583                                 if (is_rtl)
 584                                         x = leftMargin();
 585                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 586                                 x -= fm.width(str) / 2;
 587                         } else if (is_rtl) {
 588                                 x = width_ - leftMargin() -     fm.width(str);
 589                         }
 590                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 591                 }
 592         }
 593 }
 594
 595
 596 void RowPainter::paintLast()
 597 {
 598         bool const is_rtl = text_.isRTL(par_);
 599         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 600
 601         // paint imaginary end-of-paragraph character
 602
 603         Change const & change = par_.lookupChange(par_.size());
 604         if (change.changed()) {
 605                 FontMetrics const & fm =
 606                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 607                 int const length = fm.maxAscent() / 2;
 608                 Color col = change.color();
 609
 610                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 611                            Painter::line_solid, Painter::line_thick);
 612
 613                 if (change.deleted()) {
 614                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 615                                 yo_ + 2, col, Painter::line_solid, Painter::line_thick);
 616                 } else {
 617                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 618                                 yo_ + 2, col, Painter::line_solid, Painter::line_thick);
 619                 }
 620
 621         }
 622
 623         // draw an endlabel
 624
 625         switch (endlabel) {
 626         case END_LABEL_BOX:
 627         case END_LABEL_FILLED_BOX: {
 628                 FontInfo const font = labelFont();
 629                 FontMetrics const & fm = theFontMetrics(font);
 630                 int const size = int(0.75 * fm.maxAscent());
 631                 int const y = yo_ - size;
 632                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 633                 int x = is_rtl ? nestMargin() + changebarMargin()
 634                         : max_row_width - text_metrics_.rightMargin(pm_);
 635
 636                 // If needed, move the box a bit to avoid overlapping with text.
 637                 int const rem = max_row_width - row_.width();
 638                 if (rem <= 0)
 639                         x += is_rtl ? rem : - rem;
 640
 641                 if (endlabel == END_LABEL_BOX)
 642                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 643                 else
 644                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 645                 break;
 646         }
 647
 648         case END_LABEL_STATIC: {
 649                 FontInfo const font = labelFont();
 650                 FontMetrics const & fm = theFontMetrics(font);
 651                 docstring const & str = par_.layout().endlabelstring();
 652                 double const x = is_rtl ?
 653                         x_ - fm.width(str)
 654                         : - text_metrics_.rightMargin(pm_) - row_.width();
 655                 pi_.pain.text(int(x), yo_, str, font);
 656                 break;
 657         }
 658
 659         case END_LABEL_NO_LABEL:
 660                 break;
 661         }
 662 }
 663
 664
 665 void RowPainter::paintOnlyInsets()
 666 {
 667         CoordCache const & cache = pi_.base.bv->coordCache();
 668         pos_type const end = row_.endpos();
 669         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 670                 // If outer row has changed, nested insets are repaint completely.
 671                 Inset const * inset = par_.getInset(pos);
 672                 if (!inset)
 673                         continue;
 674                 if (x_ > pi_.base.bv->workWidth()
 675                     || !cache.getInsets().has(inset))
 676                         continue;
 677                 x_ = cache.getInsets().x(inset);
 678
 679                 bool const pi_selected = pi_.selected;
 680                 Cursor const & cur = pi_.base.bv->cursor();
 681                 if (cur.selection() && cur.text() == &text_
 682                           && cur.anchor().text() == &text_)
 683                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 684                 paintInset(inset, pos);
 685                 pi_.selected = pi_selected;
 686         }
 687 }
 688
 689
 690 void RowPainter::paintText()
 691 {
 692         pos_type const end = row_.endpos();
 693         // Spaces at logical line breaks in bidi text must be skipped during
 694         // painting. However, they may appear visually in the middle
 695         // of a row; they must be skipped, wherever they are...
 696         // * logically "abc_[HEBREW_\nHEBREW]"
 697         // * visually "abc_[_WERBEH\nWERBEH]"
 698         pos_type skipped_sep_vpos = -1;
 699         pos_type body_pos = par_.beginOfBody();
 700         if (body_pos > 0 &&
 701                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 702                 body_pos = 0;
 703         }
 704
 705         Layout const & layout = par_.layout();
 706
 707         Change change_running;
 708         int change_last_x = 0;
 709
 710         // check for possible inline completion
 711         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 712         pos_type inlineCompletionVPos = -1;
 713         if (inlineCompletionPos.inTexted()
 714             && inlineCompletionPos.text() == &text_
 715             && inlineCompletionPos.pit() == pit_
 716             && inlineCompletionPos.pos() - 1 >= row_.pos()
 717             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 718                 // draw logically behind the previous character
 719                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 720         }
 721
 722         // Use font span to speed things up, see below
 723         FontSpan font_span;
 724         Font font;
 725
 726         // If the last logical character is a separator, don't paint it, unless
 727         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 728         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 729                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 730
 731         for (pos_type vpos = row_.pos(); vpos < end; ) {
 732                 if (x_ > pi_.base.bv->workWidth())
 733                         break;
 734
 735                 // Skip the separator at the logical end of the row
 736                 if (vpos == skipped_sep_vpos) {
 737                         ++vpos;
 738                         continue;
 739                 }
 740
 741                 pos_type const pos = bidi_.vis2log(vpos);
 742
 743                 if (pos >= par_.size()) {
 744                         ++vpos;
 745                         continue;
 746                 }
 747
 748                 // Use font span to speed things up, see above
 749                 if (vpos < font_span.first || vpos > font_span.last) {
 750                         font_span = par_.fontSpan(vpos);
 751                         font = text_metrics_.displayFont(pit_, vpos);
 752
 753                         // split font span if inline completion is inside
 754                         if (font_span.first <= inlineCompletionVPos
 755                             && font_span.last > inlineCompletionVPos)
 756                                 font_span.last = inlineCompletionVPos;
 757                 }
 758
 759                 const int width_pos = pm_.singleWidth(pos, font);
 760
 761                 if (x_ + width_pos < 0) {
 762                         x_ += width_pos;
 763                         ++vpos;
 764                         continue;
 765                 }
 766                 Change const & change = par_.lookupChange(pos);
 767                 if (change.changed() && !change_running.changed()) {
 768                         change_running = change;
 769                         change_last_x = int(x_);
 770                 }
 771
 772                 Inset const * inset = par_.getInset(pos);
 773                 bool const highly_editable_inset = inset
 774                         && inset->editable();
 775
 776                 // If we reach the end of a change or if the author changes, paint it.
 777                 // We also don't paint across things like tables
 778                 if (change_running.changed() && (highly_editable_inset
 779                         || !change.changed() || !change_running.isSimilarTo(change))) {
 780                         // Calculate 1/3 height of the buffer's default font
 781                         FontMetrics const & fm
 782                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 783                         int const y_bar = change_running.deleted() ?
 784                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 785                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 786                                 change_running.color(), Painter::line_solid,
 787                                 Painter::line_thin);
 788
 789                         // Change might continue with a different author or type
 790                         if (change.changed() && !highly_editable_inset) {
 791                                 change_running = change;
 792                                 change_last_x = int(x_);
 793                         } else
 794                                 change_running.setUnchanged();
 795                 }
 796
 797                 if (body_pos > 0 && pos == body_pos - 1) {
 798                         int const lwidth = theFontMetrics(labelFont())
 799                                 .width(layout.labelsep);
 800
 801                         x_ += row_.label_hfill + lwidth - width_pos;
 802                 }
 803
 804                 // Is the inline completion in front of character?
 805                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 806                         paintInlineCompletion(font);
 807
 808                 if (par_.isSeparator(pos)) {
 809                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 810                         double const orig_x = x_;
 811                         x_ += width_pos;
 812                         if (pos >= body_pos)
 813                                 x_ += row_.separator;
 814                         paintForeignMark(orig_x, orig_font.language());
 815                         ++vpos;
 816
 817                 } else if (inset) {
 818                         // If outer row has changed, nested insets are repaint completely.
 819                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 820
 821                         bool const pi_selected = pi_.selected;
 822                         Cursor const & cur = pi_.base.bv->cursor();
 823                         if (cur.selection() && cur.text() == &text_
 824                                   && cur.anchor().text() == &text_)
 825                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 826                         paintInset(inset, pos);
 827                         pi_.selected = pi_selected;
 828                         ++vpos;
 829
 830                 } else {
 831                         // paint as many characters as possible.
 832                         paintFromPos(vpos);
 833                 }
 834
 835                 // Is the inline completion after character?
 836                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 837                         paintInlineCompletion(font);
 838         }
 839
 840         // if we reach the end of a struck out range, paint it
 841         if (change_running.changed()) {
 842                 FontMetrics const & fm
 843                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 844                 int const y_bar = change_running.deleted() ?
 845                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 846                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 847                         change_running.color(), Painter::line_solid, Painter::line_thin);
 848                 change_running.setUnchanged();
 849         }
 850 }
 851
 852
 853 void RowPainter::paintInlineCompletion(Font const & font)
 854 {
 855         docstring completion = pi_.base.bv->inlineCompletion();
 856         FontInfo f = font.fontInfo();
 857         bool rtl = font.isRightToLeft();
 858
 859         // draw the unique and the non-unique completion part
 860         // Note: this is not time-critical as it is
 861         // only done once per screen.
 862         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 863         docstring s1 = completion.substr(0, uniqueTo);
 864         docstring s2 = completion.substr(uniqueTo);
 865         ColorCode c1 = Color_inlinecompletion;
 866         ColorCode c2 = Color_nonunique_inlinecompletion;
 867
 868         // right to left?
 869         if (rtl) {
 870                 swap(s1, s2);
 871                 swap(c1, c2);
 872         }
 873
 874         if (s1.size() > 0) {
 875                 f.setColor(c1);
 876                 pi_.pain.text(int(x_), yo_, s1, f);
 877                 x_ += theFontMetrics(font).width(s1);
 878         }
 879
 880         if (s2.size() > 0) {
 881                 f.setColor(c2);
 882                 pi_.pain.text(int(x_), yo_, s2, f);
 883                 x_ += theFontMetrics(font).width(s2);
 884         }
 885 }
 886
 887 } // namespace lyx