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: this is a hack to get the mi.base.textwidth but
 107         // text_metrics_.width() is 1.0857 * mi.base.textwidth
 108         // ( 1.0857 = 684 / 630 )
 109         pi_.base.textwidth = int(0.92 * text_metrics_.width());
 110
 111         // FIXME: We should always use font, see documentation of
 112         // noFontChange() in Inset.h.
 113         pi_.base.font = inset->noFontChange() ?
 114                 pi_.base.bv->buffer().params().getFont().fontInfo() :
 115                 font.fontInfo();
 116         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 117         pi_.change_ = change_.changed() ? change_ : par_.lookupChange(pos);
 118
 119         int const x1 = int(x_);
 120         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 121         // insets are painted completely. Recursive
 122         inset->drawBackground(pi_, x1, yo_);
 123         inset->drawSelection(pi_, x1, yo_);
 124         inset->draw(pi_, x1, yo_);
 125
 126         Dimension const & dim = pm_.insetDimension(inset);
 127
 128         paintForeignMark(x_, font.language(), dim.descent());
 129
 130         x_ += dim.width();
 131
 132         // Restore full_repaint status.
 133         pi_.full_repaint = pi_full_repaint;
 134
 135 #ifdef DEBUG_METRICS
 136         int const x2 = x1 + dim.wid;
 137         int const y1 = yo_ + dim.des;
 138         int const y2 = yo_ - dim.asc;
 139         pi_.pain.line(x1, y1, x1, y2, Color_green);
 140         pi_.pain.line(x1, y1, x2, y1, Color_green);
 141         pi_.pain.line(x2, y1, x2, y2, Color_green);
 142         pi_.pain.line(x1, y2, x2, y2, Color_green);
 143 #endif
 144 }
 145
 146
 147 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 148 {
 149         pos_type pos = bidi_.vis2log(vpos);
 150
 151         docstring str;
 152
 153         // first char
 154         char_type c = par_.getChar(pos);
 155         str += c;
 156         ++vpos;
 157
 158         int const width = theFontMetrics(font).width(c);
 159         int dx = 0;
 160
 161         for (pos_type i = pos - 1; i >= 0; --i) {
 162                 c = par_.getChar(i);
 163                 if (!Encodings::isHebrewComposeChar(c)) {
 164                         if (isPrintableNonspace(c)) {
 165                                 int const width2 = pm_.singleWidth(i,
 166                                         text_metrics_.displayFont(pit_, i));
 167                                 dx = (c == 0x05e8 || // resh
 168                                       c == 0x05d3)   // dalet
 169                                         ? width2 - width
 170                                         : (width2 - width) / 2;
 171                         }
 172                         break;
 173                 }
 174         }
 175
 176         // Draw nikud
 177         pi_.pain.text(int(x_) + dx, yo_, str, font);
 178 }
 179
 180
 181 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 182 {
 183         pos_type pos = bidi_.vis2log(vpos);
 184         docstring str;
 185
 186         // first char
 187         char_type c = par_.getChar(pos);
 188         c = par_.transformChar(c, pos);
 189         str += c;
 190         ++vpos;
 191
 192         int const width = theFontMetrics(font).width(c);
 193         int dx = 0;
 194
 195         for (pos_type i = pos - 1; i >= 0; --i) {
 196                 c = par_.getChar(i);
 197                 if (!Encodings::isArabicComposeChar(c)) {
 198                         if (isPrintableNonspace(c)) {
 199                                 int const width2 = pm_.singleWidth(i,
 200                                                 text_metrics_.displayFont(pit_, i));
 201                                 dx = (width2 - width) / 2;
 202                         }
 203                         break;
 204                 }
 205         }
 206         // Draw nikud
 207         pi_.pain.text(int(x_) + dx, yo_, str, font);
 208 }
 209
 210
 211 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 212                             bool hebrew, bool arabic)
 213 {
 214         // This method takes up 70% of time when typing
 215         pos_type pos = bidi_.vis2log(vpos);
 216         // first character
 217         vector<char_type> str;
 218         str.reserve(100);
 219         str.push_back(par_.getChar(pos));
 220
 221         if (arabic) {
 222                 char_type c = str[0];
 223                 if (c == '(')
 224                         c = ')';
 225                 else if (c == ')')
 226                         c = '(';
 227                 str[0] = par_.transformChar(c, pos);
 228         }
 229
 230         pos_type const end = row_.endpos();
 231         FontSpan const font_span = par_.fontSpan(pos);
 232         // Track-change status.
 233         Change const & change_running = par_.lookupChange(pos);
 234
 235         // selected text?
 236         bool const selection = (pos >= row_.sel_beg && pos < row_.sel_end)
 237                 || pi_.selected;
 238
 239         char_type prev_char = ' ';
 240         // collect as much similar chars as we can
 241         for (++vpos ; vpos < end ; ++vpos) {
 242                 pos = bidi_.vis2log(vpos);
 243                 if (pos < font_span.first || pos > font_span.last)
 244                         break;
 245
 246                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 247                 if (new_selection != selection)
 248                         // Selection ends or starts here.
 249                         break;
 250
 251                 Change const & change = par_.lookupChange(pos);
 252                 if (!change_running.isSimilarTo(change))
 253                         // Track change type or author has changed.
 254                         break;
 255
 256                 char_type c = par_.getChar(pos);
 257
 258                 if (c == '\t' || prev_char == '\t') {
 259                         prev_char = c;
 260                         break;
 261                 }
 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 (s[0] == '\t')
 308                 s.replace(0,1,from_ascii("    "));
 309
 310         if (!selection && !change_running.changed()) {
 311                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 312                 return;
 313         }
 314
 315         FontInfo copy = font;
 316         if (change_running.changed())
 317                 copy.setPaintColor(change_running.color());
 318         else if (selection)
 319                 copy.setPaintColor(Color_selectiontext);
 320
 321         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 322 }
 323
 324
 325 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 326                 int desc)
 327 {
 328         if (!lyxrc.mark_foreign_language)
 329                 return;
 330         if (lang == latex_language)
 331                 return;
 332         if (lang == pi_.base.bv->buffer().params().language)
 333                 return;
 334
 335         int const y = yo_ + 1 + desc;
 336         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 337 }
 338
 339
 340 void RowPainter::paintMisspelledMark(double orig_x, int desc)
 341 {
 342         int const y = yo_ + desc;
 343         pi_.pain.line(int(orig_x), y, int(x_), y, Color_red, Painter::line_onoffdash, 0.5);
 344 }
 345
 346
 347 void RowPainter::paintFromPos(pos_type & vpos)
 348 {
 349         pos_type const pos = bidi_.vis2log(vpos);
 350         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 351         double const orig_x = x_;
 352
 353         // usual characters, no insets
 354         char_type const c = par_.getChar(pos);
 355
 356         // special case languages
 357         string const & lang = orig_font.language()->lang();
 358         bool const hebrew = lang == "hebrew";
 359         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 360                                                 lang == "farsi";
 361
 362         // draw as many chars as we can
 363         if ((!hebrew && !arabic)
 364                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 365                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 366                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 367         } else if (hebrew) {
 368                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 369         } else if (arabic) {
 370                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 371         }
 372
 373         paintForeignMark(orig_x, orig_font.language());
 374
 375         if (lyxrc.spellcheck_continuously && orig_font.isMisspelled())
 376                 paintMisspelledMark(orig_x, 2);
 377 }
 378
 379
 380 void RowPainter::paintChangeBar()
 381 {
 382         pos_type const start = row_.pos();
 383         pos_type end = row_.endpos();
 384
 385         if (par_.size() == end) {
 386                 // this is the last row of the paragraph;
 387                 // thus, we must also consider the imaginary end-of-par character
 388                 end++;
 389         }
 390
 391         if (start == end || !par_.isChanged(start, end))
 392                 return;
 393
 394         int const height = text_metrics_.isLastRow(pit_, row_)
 395                 ? row_.ascent()
 396                 : row_.height();
 397
 398         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 399 }
 400
 401
 402 void RowPainter::paintAppendix()
 403 {
 404         // only draw the appendix frame once (for the main text)
 405         if (!par_.params().appendix() || !text_.isMainText())
 406                 return;
 407
 408         int y = yo_ - row_.ascent();
 409
 410         if (par_.params().startOfAppendix())
 411                 y += 2 * defaultRowHeight();
 412
 413         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 414         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 415 }
 416
 417
 418 void RowPainter::paintDepthBar()
 419 {
 420         depth_type const depth = par_.getDepth();
 421
 422         if (depth <= 0)
 423                 return;
 424
 425         depth_type prev_depth = 0;
 426         if (!text_metrics_.isFirstRow(pit_, row_)) {
 427                 pit_type pit2 = pit_;
 428                 if (row_.pos() == 0)
 429                         --pit2;
 430                 prev_depth = pars_[pit2].getDepth();
 431         }
 432
 433         depth_type next_depth = 0;
 434         if (!text_metrics_.isLastRow(pit_, row_)) {
 435                 pit_type pit2 = pit_;
 436                 if (row_.endpos() >= pars_[pit2].size())
 437                         ++pit2;
 438                 next_depth = pars_[pit2].getDepth();
 439         }
 440
 441         for (depth_type i = 1; i <= depth; ++i) {
 442                 int const w = nestMargin() / 5;
 443                 int x = int(xo_) + w * i;
 444                 // only consider the changebar space if we're drawing outermost text
 445                 if (text_.isMainText())
 446                         x += changebarMargin();
 447
 448                 int const starty = yo_ - row_.ascent();
 449                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 450
 451                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 452
 453                 if (i > prev_depth)
 454                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 455                 if (i > next_depth)
 456                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 457         }
 458 }
 459
 460
 461 int RowPainter::paintAppendixStart(int y)
 462 {
 463         FontInfo pb_font = sane_font;
 464         pb_font.setColor(Color_appendix);
 465         pb_font.decSize();
 466
 467         int w = 0;
 468         int a = 0;
 469         int d = 0;
 470
 471         docstring const label = _("Appendix");
 472         theFontMetrics(pb_font).rectText(label, w, a, d);
 473
 474         int const text_start = int(xo_ + (width_ - w) / 2);
 475         int const text_end = text_start + w;
 476
 477         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 478
 479         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 480         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 481
 482         return 3 * defaultRowHeight();
 483 }
 484
 485
 486 void RowPainter::paintFirst()
 487 {
 488         ParagraphParameters const & pparams = par_.params();
 489         Buffer const & buffer = pi_.base.bv->buffer();
 490         BufferParams const & bparams = buffer.params();
 491         Layout const & layout = par_.layout();
 492
 493         int y_top = 0;
 494
 495         // start of appendix?
 496         if (pparams.startOfAppendix())
 497                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 498
 499         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 500                 && pit_ != 0) {
 501                 if (layout.latextype == LATEX_PARAGRAPH
 502                     && !par_.getDepth()) {
 503                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 504                 } else {
 505                         Layout const & playout = pars_[pit_ - 1].layout();
 506                         if (playout.latextype == LATEX_PARAGRAPH
 507                             && !pars_[pit_ - 1].getDepth()) {
 508                                 // is it right to use defskip here, too? (AS)
 509                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 510                         }
 511                 }
 512         }
 513
 514         bool const is_rtl = text_.isRTL(par_);
 515         bool const is_seq = text_.isFirstInSequence(pit_);
 516         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 517
 518         // should we print a label?
 519         if (layout.labeltype >= LABEL_STATIC
 520             && (layout.labeltype != LABEL_STATIC
 521                       || layout.latextype != LATEX_ENVIRONMENT
 522                       || is_seq)) {
 523
 524                 FontInfo const font = labelFont();
 525                 FontMetrics const & fm = theFontMetrics(font);
 526
 527                 docstring const str = par_.labelString();
 528                 if (!str.empty()) {
 529                         double x = x_;
 530
 531                         // this is special code for the chapter layout. This is
 532                         // printed in an extra row and has a pagebreak at
 533                         // the top.
 534                         if (layout.counter == "chapter") {
 535                                 double spacing_val = 1.0;
 536                                 if (!pparams.spacing().isDefault()) {
 537                                         spacing_val = pparams.spacing().getValue();
 538                                 } else {
 539                                         spacing_val = bparams.spacing().getValue();
 540                                 }
 541
 542                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 543
 544                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 545                                         + int(layout.parsep) * defaultRowHeight();
 546
 547                                 if (is_rtl) {
 548                                         x = width_ - leftMargin() -
 549                                                 fm.width(str);
 550                                 }
 551
 552                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 553                         } else {
 554                                 if (is_rtl) {
 555                                         x = width_ - leftMargin()
 556                                                 + fm.width(layout.labelsep);
 557                                 } else {
 558                                         x = x_ - fm.width(layout.labelsep)
 559                                                 - fm.width(str);
 560                                 }
 561
 562                                 pi_.pain.text(int(x), yo_, str, font);
 563                         }
 564                 }
 565
 566         // the labels at the top of an environment.
 567         // More or less for bibliography
 568         } else if (is_seq &&
 569                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 570                 layout.labeltype == LABEL_BIBLIO ||
 571                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 572                 FontInfo const font = labelFont();
 573                 docstring const str = par_.labelString();
 574                 if (!str.empty()) {
 575                         double spacing_val = 1.0;
 576                         if (!pparams.spacing().isDefault())
 577                                 spacing_val = pparams.spacing().getValue();
 578                         else
 579                                 spacing_val = bparams.spacing().getValue();
 580
 581                         FontMetrics const & fm = theFontMetrics(font);
 582
 583                         int const labeladdon = int(fm.maxHeight()
 584                                 * layout.spacing.getValue() * spacing_val);
 585
 586                         int maxdesc =
 587                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 588                                 + (layout.labelbottomsep * defaultRowHeight()));
 589
 590                         double x = x_;
 591                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 592                                 if (is_rtl)
 593                                         x = leftMargin();
 594                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 595                                 x -= fm.width(str) / 2;
 596                         } else if (is_rtl) {
 597                                 x = width_ - leftMargin() -     fm.width(str);
 598                         }
 599                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 600                 }
 601         }
 602 }
 603
 604
 605 /** Check if the current paragraph is the last paragraph in a
 606     proof environment */
 607 static int getEndLabel(pit_type p, Text const & text)
 608 {
 609         ParagraphList const & pars = text.paragraphs();
 610         pit_type pit = p;
 611         depth_type par_depth = pars[p].getDepth();
 612         while (pit != pit_type(pars.size())) {
 613                 Layout const & layout = pars[pit].layout();
 614                 int const endlabeltype = layout.endlabeltype;
 615
 616                 if (endlabeltype != END_LABEL_NO_LABEL) {
 617                         if (p + 1 == pit_type(pars.size()))
 618                                 return endlabeltype;
 619
 620                         depth_type const next_depth =
 621                                 pars[p + 1].getDepth();
 622                         if (par_depth > next_depth ||
 623                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 624                                 return endlabeltype;
 625                         break;
 626                 }
 627                 if (par_depth == 0)
 628                         break;
 629                 pit = text.outerHook(pit);
 630                 if (pit != pit_type(pars.size()))
 631                         par_depth = pars[pit].getDepth();
 632         }
 633         return END_LABEL_NO_LABEL;
 634 }
 635
 636
 637 void RowPainter::paintLast()
 638 {
 639         bool const is_rtl = text_.isRTL(par_);
 640         int const endlabel = getEndLabel(pit_, text_);
 641
 642         // paint imaginary end-of-paragraph character
 643
 644         Change const & change = par_.lookupChange(par_.size());
 645         if (change.changed()) {
 646                 FontMetrics const & fm =
 647                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 648                 int const length = fm.maxAscent() / 2;
 649                 Color col = change.color();
 650
 651                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 652                            Painter::line_solid, 3);
 653
 654                 if (change.deleted()) {
 655                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 656                                 yo_ + 2, col, Painter::line_solid, 3);
 657                 } else {
 658                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 659                                 yo_ + 2, col, Painter::line_solid, 3);
 660                 }
 661         }
 662
 663         // draw an endlabel
 664
 665         switch (endlabel) {
 666         case END_LABEL_BOX:
 667         case END_LABEL_FILLED_BOX: {
 668                 FontInfo const font = labelFont();
 669                 FontMetrics const & fm = theFontMetrics(font);
 670                 int const size = int(0.75 * fm.maxAscent());
 671                 int const y = yo_ - size;
 672                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 673                 int x = is_rtl ? nestMargin() + changebarMargin()
 674                         : max_row_width - text_metrics_.rightMargin(pm_);
 675
 676                 // If needed, move the box a bit to avoid overlapping with text.
 677                 int const rem = max_row_width - row_.width();
 678                 if (rem <= 0)
 679                         x += is_rtl ? rem : - rem;
 680
 681                 if (endlabel == END_LABEL_BOX)
 682                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 683                 else
 684                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 685                 break;
 686         }
 687
 688         case END_LABEL_STATIC: {
 689                 FontInfo const font = labelFont();
 690                 FontMetrics const & fm = theFontMetrics(font);
 691                 docstring const & str = par_.layout().endlabelstring();
 692                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 693                 pi_.pain.text(int(x), yo_, str, font);
 694                 break;
 695         }
 696
 697         case END_LABEL_NO_LABEL:
 698                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 699                         docstring const s = docstring(1, char_type(0x00B6));
 700                         FontInfo f = FontInfo();
 701                         FontMetrics const & fm = theFontMetrics(f);
 702                         f.setColor(Color_paragraphmarker);
 703                         pi_.pain.text(int(x_), yo_, s, f);
 704                         x_ += fm.width(s);
 705                 }
 706                 break;
 707         }
 708 }
 709
 710
 711 void RowPainter::paintOnlyInsets()
 712 {
 713         CoordCache const & cache = pi_.base.bv->coordCache();
 714         pos_type const end = row_.endpos();
 715         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 716                 // If outer row has changed, nested insets are repaint completely.
 717                 Inset const * inset = par_.getInset(pos);
 718                 if (!inset)
 719                         continue;
 720                 if (x_ > pi_.base.bv->workWidth()
 721                     || !cache.getInsets().has(inset))
 722                         continue;
 723                 x_ = cache.getInsets().x(inset);
 724
 725                 bool const pi_selected = pi_.selected;
 726                 Cursor const & cur = pi_.base.bv->cursor();
 727                 if (cur.selection() && cur.text() == &text_
 728                           && cur.normalAnchor().text() == &text_)
 729                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 730                 paintInset(inset, pos);
 731                 pi_.selected = pi_selected;
 732         }
 733 }
 734
 735
 736 void RowPainter::paintText()
 737 {
 738         pos_type const end = row_.endpos();
 739         // Spaces at logical line breaks in bidi text must be skipped during
 740         // painting. However, they may appear visually in the middle
 741         // of a row; they must be skipped, wherever they are...
 742         // * logically "abc_[HEBREW_\nHEBREW]"
 743         // * visually "abc_[_WERBEH\nWERBEH]"
 744         pos_type skipped_sep_vpos = -1;
 745         pos_type body_pos = par_.beginOfBody();
 746         if (body_pos > 0 &&
 747                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 748                 body_pos = 0;
 749         }
 750
 751         Layout const & layout = par_.layout();
 752
 753         Change change_running;
 754         int change_last_x = 0;
 755
 756         // check for possible inline completion
 757         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 758         pos_type inlineCompletionVPos = -1;
 759         if (inlineCompletionPos.inTexted()
 760             && inlineCompletionPos.text() == &text_
 761             && inlineCompletionPos.pit() == pit_
 762             && inlineCompletionPos.pos() - 1 >= row_.pos()
 763             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 764                 // draw logically behind the previous character
 765                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 766         }
 767
 768         // Use font span to speed things up, see below
 769         FontSpan font_span;
 770         Font font;
 771
 772         // If the last logical character is a separator, don't paint it, unless
 773         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 774         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 775                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 776
 777         for (pos_type vpos = row_.pos(); vpos < end; ) {
 778                 if (x_ > pi_.base.bv->workWidth())
 779                         break;
 780
 781                 // Skip the separator at the logical end of the row
 782                 if (vpos == skipped_sep_vpos) {
 783                         ++vpos;
 784                         continue;
 785                 }
 786
 787                 pos_type const pos = bidi_.vis2log(vpos);
 788
 789                 if (pos >= par_.size()) {
 790                         ++vpos;
 791                         continue;
 792                 }
 793
 794                 // Use font span to speed things up, see above
 795                 if (vpos < font_span.first || vpos > font_span.last) {
 796                         font_span = par_.fontSpan(vpos);
 797                         font = text_metrics_.displayFont(pit_, vpos);
 798
 799                         // split font span if inline completion is inside
 800                         if (font_span.first <= inlineCompletionVPos
 801                             && font_span.last > inlineCompletionVPos)
 802                                 font_span.last = inlineCompletionVPos;
 803                 }
 804
 805                 const int width_pos = pm_.singleWidth(pos, font);
 806
 807                 if (x_ + width_pos < 0) {
 808                         x_ += width_pos;
 809                         ++vpos;
 810                         continue;
 811                 }
 812                 Change const & change = par_.lookupChange(pos);
 813                 if (change.changed() && !change_running.changed()) {
 814                         change_running = change;
 815                         change_last_x = int(x_);
 816                 }
 817
 818                 Inset const * inset = par_.getInset(pos);
 819                 bool const highly_editable_inset = inset
 820                         && inset->editable();
 821
 822                 // If we reach the end of a change or if the author changes, paint it.
 823                 // We also don't paint across things like tables
 824                 if (change_running.changed() && (highly_editable_inset
 825                         || !change.changed() || !change_running.isSimilarTo(change))) {
 826                         // Calculate 1/3 height of the buffer's default font
 827                         FontMetrics const & fm
 828                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 829                         int const y_bar = change_running.deleted() ?
 830                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 831                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 832                                 change_running.color(), Painter::line_solid, 0.5);
 833
 834                         // Change might continue with a different author or type
 835                         if (change.changed() && !highly_editable_inset) {
 836                                 change_running = change;
 837                                 change_last_x = int(x_);
 838                         } else
 839                                 change_running.setUnchanged();
 840                 }
 841
 842                 if (body_pos > 0 && pos == body_pos - 1) {
 843                         int const lwidth = theFontMetrics(labelFont())
 844                                 .width(layout.labelsep);
 845
 846                         x_ += row_.label_hfill + lwidth - width_pos;
 847                 }
 848
 849                 // Is the inline completion in front of character?
 850                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 851                         paintInlineCompletion(font);
 852
 853                 if (par_.isSeparator(pos)) {
 854                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 855                         double const orig_x = x_;
 856                         x_ += width_pos;
 857                         if (pos >= body_pos)
 858                                 x_ += row_.separator;
 859                         paintForeignMark(orig_x, orig_font.language());
 860                         ++vpos;
 861
 862                 } else if (inset) {
 863                         // If outer row has changed, nested insets are repaint completely.
 864                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 865
 866                         bool const pi_selected = pi_.selected;
 867                         Cursor const & cur = pi_.base.bv->cursor();
 868                         if (cur.selection() && cur.text() == &text_
 869                                   && cur.normalAnchor().text() == &text_)
 870                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 871                         paintInset(inset, pos);
 872                         pi_.selected = pi_selected;
 873                         ++vpos;
 874
 875                 } else {
 876                         // paint as many characters as possible.
 877                         paintFromPos(vpos);
 878                 }
 879
 880                 // Is the inline completion after character?
 881                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 882                         paintInlineCompletion(font);
 883         }
 884
 885         // if we reach the end of a struck out range, paint it
 886         if (change_running.changed()) {
 887                 FontMetrics const & fm
 888                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 889                 int const y_bar = change_running.deleted() ?
 890                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 891                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 892                         change_running.color(), Painter::line_solid, 0.5);
 893                 change_running.setUnchanged();
 894         }
 895 }
 896
 897
 898 void RowPainter::paintInlineCompletion(Font const & font)
 899 {
 900         docstring completion = pi_.base.bv->inlineCompletion();
 901         FontInfo f = font.fontInfo();
 902         bool rtl = font.isRightToLeft();
 903
 904         // draw the unique and the non-unique completion part
 905         // Note: this is not time-critical as it is
 906         // only done once per screen.
 907         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 908         docstring s1 = completion.substr(0, uniqueTo);
 909         docstring s2 = completion.substr(uniqueTo);
 910         ColorCode c1 = Color_inlinecompletion;
 911         ColorCode c2 = Color_nonunique_inlinecompletion;
 912
 913         // right to left?
 914         if (rtl) {
 915                 swap(s1, s2);
 916                 swap(c1, c2);
 917         }
 918
 919         if (s1.size() > 0) {
 920                 f.setColor(c1);
 921                 pi_.pain.text(int(x_), yo_, s1, f);
 922                 x_ += theFontMetrics(font).width(s1);
 923         }
 924
 925         if (s2.size() > 0) {
 926                 f.setColor(c2);
 927                 pi_.pain.text(int(x_), yo_, s2, f);
 928                 x_ += theFontMetrics(font).width(s2);
 929         }
 930 }
 931
 932 } // namespace lyx