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         FontInfo f = text_.labelFont(par_);
  79         // selected text?
  80         if (row_.begin_margin_sel || pi_.selected)
  81                 f.setPaintColor(Color_selectiontext);
  82         return f;
  83 }
  84
  85
  86 int RowPainter::leftMargin() const
  87 {
  88         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
  89                 row_.pos());
  90 }
  91
  92 // If you want to debug inset metrics uncomment the following line:
  93 //#define DEBUG_METRICS
  94 // This draws green lines around each inset.
  95
  96
  97 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
  98 {
  99         Font const font = text_metrics_.displayFont(pit_, pos);
 100
 101         LASSERT(inset, return);
 102         // Backup full_repaint status because some insets (InsetTabular)
 103         // requires a full repaint
 104         bool pi_full_repaint = pi_.full_repaint;
 105
 106         // FIXME: We should always use font, see documentation of
 107         // noFontChange() in Inset.h.
 108         pi_.base.font = inset->noFontChange() ?
 109                 pi_.base.bv->buffer().params().getFont().fontInfo() :
 110                 font.fontInfo();
 111         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 112         pi_.change_ = change_.changed() ? change_ : par_.lookupChange(pos);
 113
 114         int const x1 = int(x_);
 115         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 116         // insets are painted completely. Recursive
 117         inset->drawBackground(pi_, x1, yo_);
 118         inset->drawSelection(pi_, x1, yo_);
 119         inset->draw(pi_, x1, yo_);
 120
 121         Dimension const & dim = pm_.insetDimension(inset);
 122
 123         paintForeignMark(x_, font.language(), dim.descent());
 124
 125         x_ += dim.width();
 126
 127         // Restore full_repaint status.
 128         pi_.full_repaint = pi_full_repaint;
 129
 130 #ifdef DEBUG_METRICS
 131         int const x2 = x1 + dim.wid;
 132         int const y1 = yo_ + dim.des;
 133         int const y2 = yo_ - dim.asc;
 134         pi_.pain.line(x1, y1, x1, y2, Color_green);
 135         pi_.pain.line(x1, y1, x2, y1, Color_green);
 136         pi_.pain.line(x2, y1, x2, y2, Color_green);
 137         pi_.pain.line(x1, y2, x2, y2, Color_green);
 138 #endif
 139 }
 140
 141
 142 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 143 {
 144         pos_type pos = bidi_.vis2log(vpos);
 145
 146         docstring str;
 147
 148         // first char
 149         char_type c = par_.getChar(pos);
 150         str += c;
 151         ++vpos;
 152
 153         int const width = theFontMetrics(font).width(c);
 154         int dx = 0;
 155
 156         for (pos_type i = pos - 1; i >= 0; --i) {
 157                 c = par_.getChar(i);
 158                 if (!Encodings::isHebrewComposeChar(c)) {
 159                         if (isPrintableNonspace(c)) {
 160                                 int const width2 = pm_.singleWidth(i,
 161                                         text_metrics_.displayFont(pit_, i));
 162                                 dx = (c == 0x05e8 || // resh
 163                                       c == 0x05d3)   // dalet
 164                                         ? width2 - width
 165                                         : (width2 - width) / 2;
 166                         }
 167                         break;
 168                 }
 169         }
 170
 171         // Draw nikud
 172         pi_.pain.text(int(x_) + dx, yo_, str, font);
 173 }
 174
 175
 176 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 177 {
 178         pos_type pos = bidi_.vis2log(vpos);
 179         docstring str;
 180
 181         // first char
 182         char_type c = par_.getChar(pos);
 183         c = par_.transformChar(c, pos);
 184         str += c;
 185         ++vpos;
 186
 187         int const width = theFontMetrics(font).width(c);
 188         int dx = 0;
 189
 190         for (pos_type i = pos - 1; i >= 0; --i) {
 191                 c = par_.getChar(i);
 192                 if (!Encodings::isArabicComposeChar(c)) {
 193                         if (isPrintableNonspace(c)) {
 194                                 int const width2 = pm_.singleWidth(i,
 195                                                 text_metrics_.displayFont(pit_, i));
 196                                 dx = (width2 - width) / 2;
 197                         }
 198                         break;
 199                 }
 200         }
 201         // Draw nikud
 202         pi_.pain.text(int(x_) + dx, yo_, str, font);
 203 }
 204
 205
 206 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 207                             bool hebrew, bool arabic)
 208 {
 209         // This method takes up 70% of time when typing
 210         pos_type pos = bidi_.vis2log(vpos);
 211         // first character
 212         vector<char_type> str;
 213         str.reserve(100);
 214         str.push_back(par_.getChar(pos));
 215
 216         if (arabic) {
 217                 char_type c = str[0];
 218                 if (c == '(')
 219                         c = ')';
 220                 else if (c == ')')
 221                         c = '(';
 222                 str[0] = par_.transformChar(c, pos);
 223         }
 224
 225         pos_type const end = row_.endpos();
 226         FontSpan const font_span = par_.fontSpan(pos);
 227         // Track-change status.
 228         Change const & change_running = par_.lookupChange(pos);
 229
 230         // selected text?
 231         bool const selection = (pos >= row_.sel_beg && pos < row_.sel_end)
 232                 || pi_.selected;
 233
 234         char_type prev_char = ' ';
 235         // collect as much similar chars as we can
 236         for (++vpos ; vpos < end ; ++vpos) {
 237                 pos = bidi_.vis2log(vpos);
 238                 if (pos < font_span.first || pos > font_span.last)
 239                         break;
 240
 241                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 242                 if (new_selection != selection)
 243                         // Selection ends or starts here.
 244                         break;
 245
 246                 Change const & change = par_.lookupChange(pos);
 247                 if (!change_running.isSimilarTo(change))
 248                         // Track change type or author has changed.
 249                         break;
 250
 251                 char_type c = par_.getChar(pos);
 252
 253                 if (c == '\t' || prev_char == '\t') {
 254                         prev_char = c;
 255                         break;
 256                 }
 257
 258                 if (!isPrintableNonspace(c))
 259                         break;
 260
 261                 /* Because we do our own bidi, at this point the strings are
 262                  * already in visual order. However, Qt also applies its own
 263                  * bidi algorithm to strings that it paints to the screen.
 264                  * Therefore, if we were to paint Hebrew/Arabic words as a
 265                  * single string, the letters in the words would get reversed
 266                  * again. In order to avoid that, we don't collect Hebrew/
 267                  * Arabic characters, but rather paint them one at a time.
 268                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 269                  */
 270                 if (hebrew)
 271                         break;
 272
 273                 /* FIXME: these checks are irrelevant, since 'arabic' and
 274                  * 'hebrew' alone are already going to trigger a break.
 275                  * However, this should not be removed completely, because
 276                  * if an alternative solution is found which allows grouping
 277                  * of arabic and hebrew characters, then these breaks may have
 278                  * to be re-applied.
 279
 280                 if (arabic && Encodings::isArabicComposeChar(c))
 281                         break;
 282
 283                 if (hebrew && Encodings::isHebrewComposeChar(c))
 284                         break;
 285                 */
 286
 287                 if (arabic) {
 288                         if (c == '(')
 289                                 c = ')';
 290                         else if (c == ')')
 291                                 c = '(';
 292                         c = par_.transformChar(c, pos);
 293                         /* see comment in hebrew, explaining why we break */
 294                         break;
 295                 }
 296
 297                 str.push_back(c);
 298         }
 299
 300         docstring s(&str[0], str.size());
 301
 302         if (s[0] == '\t')
 303                 s.replace(0,1,from_ascii("    "));
 304
 305         if (!selection && !change_running.changed()) {
 306                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 307                 return;
 308         }
 309
 310         FontInfo copy = font;
 311         if (change_running.changed())
 312                 copy.setPaintColor(change_running.color());
 313         else if (selection)
 314                 copy.setPaintColor(Color_selectiontext);
 315
 316         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 317 }
 318
 319
 320 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 321                 int desc)
 322 {
 323         if (!lyxrc.mark_foreign_language)
 324                 return;
 325         if (lang == latex_language)
 326                 return;
 327         if (lang == pi_.base.bv->buffer().params().language)
 328                 return;
 329
 330         int const y = yo_ + 1 + desc;
 331         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 332 }
 333
 334
 335 void RowPainter::paintMisspelledMark(double orig_x, int desc)
 336 {
 337         int const y = yo_ + desc;
 338         pi_.pain.line(int(orig_x), y, int(x_), y, Color_red, Painter::line_onoffdash, 0.5);
 339 }
 340
 341
 342 void RowPainter::paintFromPos(pos_type & vpos)
 343 {
 344         pos_type const pos = bidi_.vis2log(vpos);
 345         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 346         double const orig_x = x_;
 347
 348         // usual characters, no insets
 349         char_type const c = par_.getChar(pos);
 350
 351         // special case languages
 352         string const & lang = orig_font.language()->lang();
 353         bool const hebrew = lang == "hebrew";
 354         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 355                                                 lang == "farsi";
 356
 357         // draw as many chars as we can
 358         if ((!hebrew && !arabic)
 359                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 360                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 361                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 362         } else if (hebrew) {
 363                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 364         } else if (arabic) {
 365                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 366         }
 367
 368         paintForeignMark(orig_x, orig_font.language());
 369
 370         if (lyxrc.spellcheck_continuously && orig_font.isMisspelled())
 371                 paintMisspelledMark(orig_x, 2);
 372 }
 373
 374
 375 void RowPainter::paintChangeBar()
 376 {
 377         pos_type const start = row_.pos();
 378         pos_type end = row_.endpos();
 379
 380         if (par_.size() == end) {
 381                 // this is the last row of the paragraph;
 382                 // thus, we must also consider the imaginary end-of-par character
 383                 end++;
 384         }
 385
 386         if (start == end || !par_.isChanged(start, end))
 387                 return;
 388
 389         int const height = text_metrics_.isLastRow(pit_, row_)
 390                 ? row_.ascent()
 391                 : row_.height();
 392
 393         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 394 }
 395
 396
 397 void RowPainter::paintAppendix()
 398 {
 399         // only draw the appendix frame once (for the main text)
 400         if (!par_.params().appendix() || !text_.isMainText())
 401                 return;
 402
 403         int y = yo_ - row_.ascent();
 404
 405         if (par_.params().startOfAppendix())
 406                 y += 2 * defaultRowHeight();
 407
 408         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 409         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 410 }
 411
 412
 413 void RowPainter::paintDepthBar()
 414 {
 415         depth_type const depth = par_.getDepth();
 416
 417         if (depth <= 0)
 418                 return;
 419
 420         depth_type prev_depth = 0;
 421         if (!text_metrics_.isFirstRow(pit_, row_)) {
 422                 pit_type pit2 = pit_;
 423                 if (row_.pos() == 0)
 424                         --pit2;
 425                 prev_depth = pars_[pit2].getDepth();
 426         }
 427
 428         depth_type next_depth = 0;
 429         if (!text_metrics_.isLastRow(pit_, row_)) {
 430                 pit_type pit2 = pit_;
 431                 if (row_.endpos() >= pars_[pit2].size())
 432                         ++pit2;
 433                 next_depth = pars_[pit2].getDepth();
 434         }
 435
 436         for (depth_type i = 1; i <= depth; ++i) {
 437                 int const w = nestMargin() / 5;
 438                 int x = int(xo_) + w * i;
 439                 // only consider the changebar space if we're drawing outermost text
 440                 if (text_.isMainText())
 441                         x += changebarMargin();
 442
 443                 int const starty = yo_ - row_.ascent();
 444                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 445
 446                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 447
 448                 if (i > prev_depth)
 449                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 450                 if (i > next_depth)
 451                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 452         }
 453 }
 454
 455
 456 int RowPainter::paintAppendixStart(int y)
 457 {
 458         FontInfo pb_font = sane_font;
 459         pb_font.setColor(Color_appendix);
 460         pb_font.decSize();
 461
 462         int w = 0;
 463         int a = 0;
 464         int d = 0;
 465
 466         docstring const label = _("Appendix");
 467         theFontMetrics(pb_font).rectText(label, w, a, d);
 468
 469         int const text_start = int(xo_ + (width_ - w) / 2);
 470         int const text_end = text_start + w;
 471
 472         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 473
 474         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 475         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 476
 477         return 3 * defaultRowHeight();
 478 }
 479
 480
 481 void RowPainter::paintFirst()
 482 {
 483         ParagraphParameters const & pparams = par_.params();
 484         Buffer const & buffer = pi_.base.bv->buffer();
 485         BufferParams const & bparams = buffer.params();
 486         Layout const & layout = par_.layout();
 487
 488         int y_top = 0;
 489
 490         // start of appendix?
 491         if (pparams.startOfAppendix())
 492                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 493
 494         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 495                 && pit_ != 0) {
 496                 if (layout.latextype == LATEX_PARAGRAPH
 497                     && !par_.getDepth()) {
 498                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 499                 } else {
 500                         Layout const & playout = pars_[pit_ - 1].layout();
 501                         if (playout.latextype == LATEX_PARAGRAPH
 502                             && !pars_[pit_ - 1].getDepth()) {
 503                                 // is it right to use defskip here, too? (AS)
 504                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 505                         }
 506                 }
 507         }
 508
 509         bool const is_rtl = text_.isRTL(par_);
 510         bool const is_seq = text_.isFirstInSequence(pit_);
 511         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 512
 513         // should we print a label?
 514         if (layout.labeltype >= LABEL_STATIC
 515             && (layout.labeltype != LABEL_STATIC
 516                       || layout.latextype != LATEX_ENVIRONMENT
 517                       || is_seq)) {
 518
 519                 FontInfo const font = labelFont();
 520                 FontMetrics const & fm = theFontMetrics(font);
 521
 522                 docstring const str = par_.labelString();
 523                 if (!str.empty()) {
 524                         double x = x_;
 525
 526                         // this is special code for the chapter layout. This is
 527                         // printed in an extra row and has a pagebreak at
 528                         // the top.
 529                         if (layout.counter == "chapter") {
 530                                 double spacing_val = 1.0;
 531                                 if (!pparams.spacing().isDefault()) {
 532                                         spacing_val = pparams.spacing().getValue();
 533                                 } else {
 534                                         spacing_val = bparams.spacing().getValue();
 535                                 }
 536
 537                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 538
 539                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 540                                         + int(layout.parsep) * defaultRowHeight();
 541
 542                                 if (is_rtl) {
 543                                         x = width_ - leftMargin() -
 544                                                 fm.width(str);
 545                                 }
 546
 547                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 548                         } else {
 549                                 if (is_rtl) {
 550                                         x = width_ - leftMargin()
 551                                                 + fm.width(layout.labelsep);
 552                                 } else {
 553                                         x = x_ - fm.width(layout.labelsep)
 554                                                 - fm.width(str);
 555                                 }
 556
 557                                 pi_.pain.text(int(x), yo_, str, font);
 558                         }
 559                 }
 560
 561         // the labels at the top of an environment.
 562         // More or less for bibliography
 563         } else if (is_seq &&
 564                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 565                 layout.labeltype == LABEL_BIBLIO ||
 566                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 567                 FontInfo const font = labelFont();
 568                 docstring const str = par_.labelString();
 569                 if (!str.empty()) {
 570                         double spacing_val = 1.0;
 571                         if (!pparams.spacing().isDefault())
 572                                 spacing_val = pparams.spacing().getValue();
 573                         else
 574                                 spacing_val = bparams.spacing().getValue();
 575
 576                         FontMetrics const & fm = theFontMetrics(font);
 577
 578                         int const labeladdon = int(fm.maxHeight()
 579                                 * layout.spacing.getValue() * spacing_val);
 580
 581                         int maxdesc =
 582                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 583                                 + (layout.labelbottomsep * defaultRowHeight()));
 584
 585                         double x = x_;
 586                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 587                                 if (is_rtl)
 588                                         x = leftMargin();
 589                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 590                                 x -= fm.width(str) / 2;
 591                         } else if (is_rtl) {
 592                                 x = width_ - leftMargin() -     fm.width(str);
 593                         }
 594                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 595                 }
 596         }
 597 }
 598
 599
 600 /** Check if the current paragraph is the last paragraph in a
 601     proof environment */
 602 static int getEndLabel(pit_type p, Text const & text)
 603 {
 604         ParagraphList const & pars = text.paragraphs();
 605         pit_type pit = p;
 606         depth_type par_depth = pars[p].getDepth();
 607         while (pit != pit_type(pars.size())) {
 608                 Layout const & layout = pars[pit].layout();
 609                 int const endlabeltype = layout.endlabeltype;
 610
 611                 if (endlabeltype != END_LABEL_NO_LABEL) {
 612                         if (p + 1 == pit_type(pars.size()))
 613                                 return endlabeltype;
 614
 615                         depth_type const next_depth =
 616                                 pars[p + 1].getDepth();
 617                         if (par_depth > next_depth ||
 618                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 619                                 return endlabeltype;
 620                         break;
 621                 }
 622                 if (par_depth == 0)
 623                         break;
 624                 pit = text.outerHook(pit);
 625                 if (pit != pit_type(pars.size()))
 626                         par_depth = pars[pit].getDepth();
 627         }
 628         return END_LABEL_NO_LABEL;
 629 }
 630
 631
 632 void RowPainter::paintLast()
 633 {
 634         bool const is_rtl = text_.isRTL(par_);
 635         int const endlabel = getEndLabel(pit_, text_);
 636
 637         // paint imaginary end-of-paragraph character
 638
 639         Change const & change = par_.lookupChange(par_.size());
 640         if (change.changed()) {
 641                 FontMetrics const & fm =
 642                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 643                 int const length = fm.maxAscent() / 2;
 644                 Color col = change.color();
 645
 646                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 647                            Painter::line_solid, 3);
 648
 649                 if (change.deleted()) {
 650                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 651                                 yo_ + 2, col, Painter::line_solid, 3);
 652                 } else {
 653                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 654                                 yo_ + 2, col, Painter::line_solid, 3);
 655                 }
 656         }
 657
 658         // draw an endlabel
 659
 660         switch (endlabel) {
 661         case END_LABEL_BOX:
 662         case END_LABEL_FILLED_BOX: {
 663                 FontInfo const font = labelFont();
 664                 FontMetrics const & fm = theFontMetrics(font);
 665                 int const size = int(0.75 * fm.maxAscent());
 666                 int const y = yo_ - size;
 667                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 668                 int x = is_rtl ? nestMargin() + changebarMargin()
 669                         : max_row_width - text_metrics_.rightMargin(pm_);
 670
 671                 // If needed, move the box a bit to avoid overlapping with text.
 672                 int const rem = max_row_width - row_.width();
 673                 if (rem <= 0)
 674                         x += is_rtl ? rem : - rem;
 675
 676                 if (endlabel == END_LABEL_BOX)
 677                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 678                 else
 679                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 680                 break;
 681         }
 682
 683         case END_LABEL_STATIC: {
 684                 FontInfo const font = labelFont();
 685                 FontMetrics const & fm = theFontMetrics(font);
 686                 docstring const & str = par_.layout().endlabelstring();
 687                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 688                 pi_.pain.text(int(x), yo_, str, font);
 689                 break;
 690         }
 691
 692         case END_LABEL_NO_LABEL:
 693                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 694                         docstring const s = docstring(1, char_type(0x00B6));
 695                         FontInfo f = FontInfo();
 696                         FontMetrics const & fm = theFontMetrics(f);
 697                         f.setColor(Color_paragraphmarker);
 698                         pi_.pain.text(int(x_), yo_, s, f);
 699                         x_ += fm.width(s);
 700                 }
 701                 break;
 702         }
 703 }
 704
 705
 706 void RowPainter::paintOnlyInsets()
 707 {
 708         CoordCache const & cache = pi_.base.bv->coordCache();
 709         pos_type const end = row_.endpos();
 710         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 711                 // If outer row has changed, nested insets are repaint completely.
 712                 Inset const * inset = par_.getInset(pos);
 713                 if (!inset)
 714                         continue;
 715                 if (x_ > pi_.base.bv->workWidth()
 716                     || !cache.getInsets().has(inset))
 717                         continue;
 718                 x_ = cache.getInsets().x(inset);
 719
 720                 bool const pi_selected = pi_.selected;
 721                 Cursor const & cur = pi_.base.bv->cursor();
 722                 if (cur.selection() && cur.text() == &text_
 723                           && cur.normalAnchor().text() == &text_)
 724                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 725                 paintInset(inset, pos);
 726                 pi_.selected = pi_selected;
 727         }
 728 }
 729
 730
 731 void RowPainter::paintText()
 732 {
 733         pos_type const end = row_.endpos();
 734         // Spaces at logical line breaks in bidi text must be skipped during
 735         // painting. However, they may appear visually in the middle
 736         // of a row; they must be skipped, wherever they are...
 737         // * logically "abc_[HEBREW_\nHEBREW]"
 738         // * visually "abc_[_WERBEH\nWERBEH]"
 739         pos_type skipped_sep_vpos = -1;
 740         pos_type body_pos = par_.beginOfBody();
 741         if (body_pos > 0 &&
 742                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 743                 body_pos = 0;
 744         }
 745
 746         Layout const & layout = par_.layout();
 747
 748         Change change_running;
 749         int change_last_x = 0;
 750
 751         // check for possible inline completion
 752         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 753         pos_type inlineCompletionVPos = -1;
 754         if (inlineCompletionPos.inTexted()
 755             && inlineCompletionPos.text() == &text_
 756             && inlineCompletionPos.pit() == pit_
 757             && inlineCompletionPos.pos() - 1 >= row_.pos()
 758             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 759                 // draw logically behind the previous character
 760                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 761         }
 762
 763         // Use font span to speed things up, see below
 764         FontSpan font_span;
 765         Font font;
 766
 767         // If the last logical character is a separator, don't paint it, unless
 768         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 769         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 770                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 771
 772         for (pos_type vpos = row_.pos(); vpos < end; ) {
 773                 if (x_ > pi_.base.bv->workWidth())
 774                         break;
 775
 776                 // Skip the separator at the logical end of the row
 777                 if (vpos == skipped_sep_vpos) {
 778                         ++vpos;
 779                         continue;
 780                 }
 781
 782                 pos_type const pos = bidi_.vis2log(vpos);
 783
 784                 if (pos >= par_.size()) {
 785                         ++vpos;
 786                         continue;
 787                 }
 788
 789                 // Use font span to speed things up, see above
 790                 if (vpos < font_span.first || vpos > font_span.last) {
 791                         font_span = par_.fontSpan(vpos);
 792                         font = text_metrics_.displayFont(pit_, vpos);
 793
 794                         // split font span if inline completion is inside
 795                         if (font_span.first <= inlineCompletionVPos
 796                             && font_span.last > inlineCompletionVPos)
 797                                 font_span.last = inlineCompletionVPos;
 798                 }
 799
 800                 const int width_pos = pm_.singleWidth(pos, font);
 801
 802                 if (x_ + width_pos < 0) {
 803                         x_ += width_pos;
 804                         ++vpos;
 805                         continue;
 806                 }
 807                 Change const & change = par_.lookupChange(pos);
 808                 if (change.changed() && !change_running.changed()) {
 809                         change_running = change;
 810                         change_last_x = int(x_);
 811                 }
 812
 813                 Inset const * inset = par_.getInset(pos);
 814                 bool const highly_editable_inset = inset
 815                         && inset->editable();
 816
 817                 // If we reach the end of a change or if the author changes, paint it.
 818                 // We also don't paint across things like tables
 819                 if (change_running.changed() && (highly_editable_inset
 820                         || !change.changed() || !change_running.isSimilarTo(change))) {
 821                         // Calculate 1/3 height of the buffer's default font
 822                         FontMetrics const & fm
 823                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 824                         int const y_bar = change_running.deleted() ?
 825                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 826                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 827                                 change_running.color(), Painter::line_solid, 0.5);
 828
 829                         // Change might continue with a different author or type
 830                         if (change.changed() && !highly_editable_inset) {
 831                                 change_running = change;
 832                                 change_last_x = int(x_);
 833                         } else
 834                                 change_running.setUnchanged();
 835                 }
 836
 837                 if (body_pos > 0 && pos == body_pos - 1) {
 838                         int const lwidth = theFontMetrics(labelFont())
 839                                 .width(layout.labelsep);
 840
 841                         x_ += row_.label_hfill + lwidth - width_pos;
 842                 }
 843
 844                 // Is the inline completion in front of character?
 845                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 846                         paintInlineCompletion(font);
 847
 848                 if (par_.isSeparator(pos)) {
 849                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 850                         double const orig_x = x_;
 851                         x_ += width_pos;
 852                         if (pos >= body_pos)
 853                                 x_ += row_.separator;
 854                         paintForeignMark(orig_x, orig_font.language());
 855                         ++vpos;
 856
 857                 } else if (inset) {
 858                         // If outer row has changed, nested insets are repaint completely.
 859                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 860
 861                         bool const pi_selected = pi_.selected;
 862                         Cursor const & cur = pi_.base.bv->cursor();
 863                         if (cur.selection() && cur.text() == &text_
 864                                   && cur.normalAnchor().text() == &text_)
 865                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 866                         paintInset(inset, pos);
 867                         pi_.selected = pi_selected;
 868                         ++vpos;
 869
 870                 } else {
 871                         // paint as many characters as possible.
 872                         paintFromPos(vpos);
 873                 }
 874
 875                 // Is the inline completion after character?
 876                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 877                         paintInlineCompletion(font);
 878         }
 879
 880         // if we reach the end of a struck out range, paint it
 881         if (change_running.changed()) {
 882                 FontMetrics const & fm
 883                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 884                 int const y_bar = change_running.deleted() ?
 885                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 886                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 887                         change_running.color(), Painter::line_solid, 0.5);
 888                 change_running.setUnchanged();
 889         }
 890 }
 891
 892
 893 void RowPainter::paintInlineCompletion(Font const & font)
 894 {
 895         docstring completion = pi_.base.bv->inlineCompletion();
 896         FontInfo f = font.fontInfo();
 897         bool rtl = font.isRightToLeft();
 898
 899         // draw the unique and the non-unique completion part
 900         // Note: this is not time-critical as it is
 901         // only done once per screen.
 902         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 903         docstring s1 = completion.substr(0, uniqueTo);
 904         docstring s2 = completion.substr(uniqueTo);
 905         ColorCode c1 = Color_inlinecompletion;
 906         ColorCode c2 = Color_nonunique_inlinecompletion;
 907
 908         // right to left?
 909         if (rtl) {
 910                 swap(s1, s2);
 911                 swap(c1, c2);
 912         }
 913
 914         if (s1.size() > 0) {
 915                 f.setColor(c1);
 916                 pi_.pain.text(int(x_), yo_, s1, f);
 917                 x_ += theFontMetrics(font).width(s1);
 918         }
 919
 920         if (s2.size() > 0) {
 921                 f.setColor(c2);
 922                 pi_.pain.text(int(x_), yo_, s2, f);
 923                 x_ += theFontMetrics(font).width(s2);
 924         }
 925 }
 926
 927 } // namespace lyx