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                 || pi_.selected;
 229
 230         char_type prev_char = ' ';
 231         // collect as much similar chars as we can
 232         for (++vpos ; vpos < end ; ++vpos) {
 233                 pos = bidi_.vis2log(vpos);
 234                 if (pos < font_span.first || pos > font_span.last)
 235                         break;
 236
 237                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 238                 if (new_selection != selection)
 239                         // Selection ends or starts here.
 240                         break;
 241
 242                 Change const & change = par_.lookupChange(pos);
 243                 if (!change_running.isSimilarTo(change))
 244                         // Track change type or author has changed.
 245                         break;
 246
 247                 char_type c = par_.getChar(pos);
 248
 249                 if (c == '\t' || prev_char == '\t') {
 250                         prev_char = c;
 251                         break;
 252                 }
 253
 254                 if (!isPrintableNonspace(c))
 255                         break;
 256
 257                 /* Because we do our own bidi, at this point the strings are
 258                  * already in visual order. However, Qt also applies its own
 259                  * bidi algorithm to strings that it paints to the screen.
 260                  * Therefore, if we were to paint Hebrew/Arabic words as a
 261                  * single string, the letters in the words would get reversed
 262                  * again. In order to avoid that, we don't collect Hebrew/
 263                  * Arabic characters, but rather paint them one at a time.
 264                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 265                  */
 266                 if (hebrew)
 267                         break;
 268
 269                 /* FIXME: these checks are irrelevant, since 'arabic' and
 270                  * 'hebrew' alone are already going to trigger a break.
 271                  * However, this should not be removed completely, because
 272                  * if an alternative solution is found which allows grouping
 273                  * of arabic and hebrew characters, then these breaks may have
 274                  * to be re-applied.
 275
 276                 if (arabic && Encodings::isArabicComposeChar(c))
 277                         break;
 278
 279                 if (hebrew && Encodings::isHebrewComposeChar(c))
 280                         break;
 281                 */
 282
 283                 if (arabic) {
 284                         if (c == '(')
 285                                 c = ')';
 286                         else if (c == ')')
 287                                 c = '(';
 288                         c = par_.transformChar(c, pos);
 289                         /* see comment in hebrew, explaining why we break */
 290                         break;
 291                 }
 292
 293                 str.push_back(c);
 294         }
 295
 296         docstring s(&str[0], str.size());
 297
 298         if (s[0] == '\t')
 299                 s.replace(0,1,from_ascii("    "));
 300
 301         if (!selection && !change_running.changed()) {
 302                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 303                 return;
 304         }
 305
 306         FontInfo copy = font;
 307         if (change_running.changed())
 308                 copy.setPaintColor(change_running.color());
 309         else if (selection)
 310                 copy.setPaintColor(Color_selectiontext);
 311
 312         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 313 }
 314
 315
 316 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 317                 int desc)
 318 {
 319         if (!lyxrc.mark_foreign_language)
 320                 return;
 321         if (lang == latex_language)
 322                 return;
 323         if (lang == pi_.base.bv->buffer().params().language)
 324                 return;
 325
 326         int const y = yo_ + 1 + desc;
 327         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 328 }
 329
 330
 331 void RowPainter::paintMisspelledMark(double orig_x, int desc)
 332 {
 333         int const y = yo_ + desc;
 334         pi_.pain.line(int(orig_x), y, int(x_), y, Color_red, Painter::line_onoffdash, 0.5);
 335 }
 336
 337
 338 void RowPainter::paintFromPos(pos_type & vpos)
 339 {
 340         pos_type const pos = bidi_.vis2log(vpos);
 341         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 342         double const orig_x = x_;
 343
 344         // usual characters, no insets
 345         char_type const c = par_.getChar(pos);
 346
 347         // special case languages
 348         string const & lang = orig_font.language()->lang();
 349         bool const hebrew = lang == "hebrew";
 350         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 351                                                 lang == "farsi";
 352
 353         // draw as many chars as we can
 354         if ((!hebrew && !arabic)
 355                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 356                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 357                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 358         } else if (hebrew) {
 359                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 360         } else if (arabic) {
 361                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 362         }
 363
 364         paintForeignMark(orig_x, orig_font.language());
 365
 366         if (lyxrc.spellcheck_continuously && orig_font.isMisspelled())
 367                 paintMisspelledMark(orig_x, 2);
 368 }
 369
 370
 371 void RowPainter::paintChangeBar()
 372 {
 373         pos_type const start = row_.pos();
 374         pos_type end = row_.endpos();
 375
 376         if (par_.size() == end) {
 377                 // this is the last row of the paragraph;
 378                 // thus, we must also consider the imaginary end-of-par character
 379                 end++;
 380         }
 381
 382         if (start == end || !par_.isChanged(start, end))
 383                 return;
 384
 385         int const height = text_metrics_.isLastRow(pit_, row_)
 386                 ? row_.ascent()
 387                 : row_.height();
 388
 389         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 390 }
 391
 392
 393 void RowPainter::paintAppendix()
 394 {
 395         // only draw the appendix frame once (for the main text)
 396         if (!par_.params().appendix() || !text_.isMainText())
 397                 return;
 398
 399         int y = yo_ - row_.ascent();
 400
 401         if (par_.params().startOfAppendix())
 402                 y += 2 * defaultRowHeight();
 403
 404         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 405         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 406 }
 407
 408
 409 void RowPainter::paintDepthBar()
 410 {
 411         depth_type const depth = par_.getDepth();
 412
 413         if (depth <= 0)
 414                 return;
 415
 416         depth_type prev_depth = 0;
 417         if (!text_metrics_.isFirstRow(pit_, row_)) {
 418                 pit_type pit2 = pit_;
 419                 if (row_.pos() == 0)
 420                         --pit2;
 421                 prev_depth = pars_[pit2].getDepth();
 422         }
 423
 424         depth_type next_depth = 0;
 425         if (!text_metrics_.isLastRow(pit_, row_)) {
 426                 pit_type pit2 = pit_;
 427                 if (row_.endpos() >= pars_[pit2].size())
 428                         ++pit2;
 429                 next_depth = pars_[pit2].getDepth();
 430         }
 431
 432         for (depth_type i = 1; i <= depth; ++i) {
 433                 int const w = nestMargin() / 5;
 434                 int x = int(xo_) + w * i;
 435                 // only consider the changebar space if we're drawing outermost text
 436                 if (text_.isMainText())
 437                         x += changebarMargin();
 438
 439                 int const starty = yo_ - row_.ascent();
 440                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 441
 442                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 443
 444                 if (i > prev_depth)
 445                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 446                 if (i > next_depth)
 447                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 448         }
 449 }
 450
 451
 452 int RowPainter::paintAppendixStart(int y)
 453 {
 454         FontInfo pb_font = sane_font;
 455         pb_font.setColor(Color_appendix);
 456         pb_font.decSize();
 457
 458         int w = 0;
 459         int a = 0;
 460         int d = 0;
 461
 462         docstring const label = _("Appendix");
 463         theFontMetrics(pb_font).rectText(label, w, a, d);
 464
 465         int const text_start = int(xo_ + (width_ - w) / 2);
 466         int const text_end = text_start + w;
 467
 468         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 469
 470         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 471         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 472
 473         return 3 * defaultRowHeight();
 474 }
 475
 476
 477 void RowPainter::paintFirst()
 478 {
 479         ParagraphParameters const & pparams = par_.params();
 480         Buffer const & buffer = pi_.base.bv->buffer();
 481         BufferParams const & bparams = buffer.params();
 482         Layout const & layout = par_.layout();
 483
 484         int y_top = 0;
 485
 486         // start of appendix?
 487         if (pparams.startOfAppendix())
 488                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 489
 490         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 491                 && pit_ != 0) {
 492                 if (layout.latextype == LATEX_PARAGRAPH
 493                     && !par_.getDepth()) {
 494                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 495                 } else {
 496                         Layout const & playout = pars_[pit_ - 1].layout();
 497                         if (playout.latextype == LATEX_PARAGRAPH
 498                             && !pars_[pit_ - 1].getDepth()) {
 499                                 // is it right to use defskip here, too? (AS)
 500                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 501                         }
 502                 }
 503         }
 504
 505         bool const is_rtl = text_.isRTL(par_);
 506         bool const is_seq = text_.isFirstInSequence(pit_);
 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 (!pparams.spacing().isDefault()) {
 528                                         spacing_val = pparams.spacing().getValue();
 529                                 } else {
 530                                         spacing_val = bparams.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 (!pparams.spacing().isDefault())
 568                                 spacing_val = pparams.spacing().getValue();
 569                         else
 570                                 spacing_val = bparams.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 /** Check if the current paragraph is the last paragraph in a
 597     proof environment */
 598 static int getEndLabel(pit_type p, Text const & text)
 599 {
 600         ParagraphList const & pars = text.paragraphs();
 601         pit_type pit = p;
 602         depth_type par_depth = pars[p].getDepth();
 603         while (pit != pit_type(pars.size())) {
 604                 Layout const & layout = pars[pit].layout();
 605                 int const endlabeltype = layout.endlabeltype;
 606
 607                 if (endlabeltype != END_LABEL_NO_LABEL) {
 608                         if (p + 1 == pit_type(pars.size()))
 609                                 return endlabeltype;
 610
 611                         depth_type const next_depth =
 612                                 pars[p + 1].getDepth();
 613                         if (par_depth > next_depth ||
 614                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 615                                 return endlabeltype;
 616                         break;
 617                 }
 618                 if (par_depth == 0)
 619                         break;
 620                 pit = text.outerHook(pit);
 621                 if (pit != pit_type(pars.size()))
 622                         par_depth = pars[pit].getDepth();
 623         }
 624         return END_LABEL_NO_LABEL;
 625 }
 626
 627
 628 void RowPainter::paintLast()
 629 {
 630         bool const is_rtl = text_.isRTL(par_);
 631         int const endlabel = getEndLabel(pit_, text_);
 632
 633         // paint imaginary end-of-paragraph character
 634
 635         Change const & change = par_.lookupChange(par_.size());
 636         if (change.changed()) {
 637                 FontMetrics const & fm =
 638                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 639                 int const length = fm.maxAscent() / 2;
 640                 Color col = change.color();
 641
 642                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 643                            Painter::line_solid, 3);
 644
 645                 if (change.deleted()) {
 646                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 647                                 yo_ + 2, col, Painter::line_solid, 3);
 648                 } else {
 649                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 650                                 yo_ + 2, col, Painter::line_solid, 3);
 651                 }
 652         }
 653
 654         // draw an endlabel
 655
 656         switch (endlabel) {
 657         case END_LABEL_BOX:
 658         case END_LABEL_FILLED_BOX: {
 659                 FontInfo const font = labelFont();
 660                 FontMetrics const & fm = theFontMetrics(font);
 661                 int const size = int(0.75 * fm.maxAscent());
 662                 int const y = yo_ - size;
 663                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 664                 int x = is_rtl ? nestMargin() + changebarMargin()
 665                         : max_row_width - text_metrics_.rightMargin(pm_);
 666
 667                 // If needed, move the box a bit to avoid overlapping with text.
 668                 int const rem = max_row_width - row_.width();
 669                 if (rem <= 0)
 670                         x += is_rtl ? rem : - rem;
 671
 672                 if (endlabel == END_LABEL_BOX)
 673                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 674                 else
 675                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 676                 break;
 677         }
 678
 679         case END_LABEL_STATIC: {
 680                 FontInfo const font = labelFont();
 681                 FontMetrics const & fm = theFontMetrics(font);
 682                 docstring const & str = par_.layout().endlabelstring();
 683                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 684                 pi_.pain.text(int(x), yo_, str, font);
 685                 break;
 686         }
 687
 688         case END_LABEL_NO_LABEL:
 689                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 690                         docstring const s = docstring(1, char_type(0x00B6));
 691                         FontInfo f = FontInfo();
 692                         FontMetrics const & fm = theFontMetrics(f);
 693                         f.setColor(Color_paragraphmarker);
 694                         pi_.pain.text(int(x_), yo_, s, f);
 695                         x_ += fm.width(s);
 696                 }
 697                 break;
 698         }
 699 }
 700
 701
 702 void RowPainter::paintOnlyInsets()
 703 {
 704         CoordCache const & cache = pi_.base.bv->coordCache();
 705         pos_type const end = row_.endpos();
 706         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 707                 // If outer row has changed, nested insets are repaint completely.
 708                 Inset const * inset = par_.getInset(pos);
 709                 if (!inset)
 710                         continue;
 711                 if (x_ > pi_.base.bv->workWidth()
 712                     || !cache.getInsets().has(inset))
 713                         continue;
 714                 x_ = cache.getInsets().x(inset);
 715
 716                 bool const pi_selected = pi_.selected;
 717                 Cursor const & cur = pi_.base.bv->cursor();
 718                 if (cur.selection() && cur.text() == &text_
 719                           && cur.normalAnchor().text() == &text_)
 720                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 721                 paintInset(inset, pos);
 722                 pi_.selected = pi_selected;
 723         }
 724 }
 725
 726
 727 void RowPainter::paintText()
 728 {
 729         pos_type const end = row_.endpos();
 730         // Spaces at logical line breaks in bidi text must be skipped during
 731         // painting. However, they may appear visually in the middle
 732         // of a row; they must be skipped, wherever they are...
 733         // * logically "abc_[HEBREW_\nHEBREW]"
 734         // * visually "abc_[_WERBEH\nWERBEH]"
 735         pos_type skipped_sep_vpos = -1;
 736         pos_type body_pos = par_.beginOfBody();
 737         if (body_pos > 0 &&
 738                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 739                 body_pos = 0;
 740         }
 741
 742         Layout const & layout = par_.layout();
 743
 744         Change change_running;
 745         int change_last_x = 0;
 746
 747         // check for possible inline completion
 748         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 749         pos_type inlineCompletionVPos = -1;
 750         if (inlineCompletionPos.inTexted()
 751             && inlineCompletionPos.text() == &text_
 752             && inlineCompletionPos.pit() == pit_
 753             && inlineCompletionPos.pos() - 1 >= row_.pos()
 754             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 755                 // draw logically behind the previous character
 756                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 757         }
 758
 759         // Use font span to speed things up, see below
 760         FontSpan font_span;
 761         Font font;
 762
 763         // If the last logical character is a separator, don't paint it, unless
 764         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 765         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 766                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 767
 768         for (pos_type vpos = row_.pos(); vpos < end; ) {
 769                 if (x_ > pi_.base.bv->workWidth())
 770                         break;
 771
 772                 // Skip the separator at the logical end of the row
 773                 if (vpos == skipped_sep_vpos) {
 774                         ++vpos;
 775                         continue;
 776                 }
 777
 778                 pos_type const pos = bidi_.vis2log(vpos);
 779
 780                 if (pos >= par_.size()) {
 781                         ++vpos;
 782                         continue;
 783                 }
 784
 785                 // Use font span to speed things up, see above
 786                 if (vpos < font_span.first || vpos > font_span.last) {
 787                         font_span = par_.fontSpan(vpos);
 788                         font = text_metrics_.displayFont(pit_, vpos);
 789
 790                         // split font span if inline completion is inside
 791                         if (font_span.first <= inlineCompletionVPos
 792                             && font_span.last > inlineCompletionVPos)
 793                                 font_span.last = inlineCompletionVPos;
 794                 }
 795
 796                 const int width_pos = pm_.singleWidth(pos, font);
 797
 798                 if (x_ + width_pos < 0) {
 799                         x_ += width_pos;
 800                         ++vpos;
 801                         continue;
 802                 }
 803                 Change const & change = par_.lookupChange(pos);
 804                 if (change.changed() && !change_running.changed()) {
 805                         change_running = change;
 806                         change_last_x = int(x_);
 807                 }
 808
 809                 Inset const * inset = par_.getInset(pos);
 810                 bool const highly_editable_inset = inset
 811                         && inset->editable();
 812
 813                 // If we reach the end of a change or if the author changes, paint it.
 814                 // We also don't paint across things like tables
 815                 if (change_running.changed() && (highly_editable_inset
 816                         || !change.changed() || !change_running.isSimilarTo(change))) {
 817                         // Calculate 1/3 height of the buffer's default font
 818                         FontMetrics const & fm
 819                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 820                         int const y_bar = change_running.deleted() ?
 821                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 822                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 823                                 change_running.color(), Painter::line_solid, 0.5);
 824
 825                         // Change might continue with a different author or type
 826                         if (change.changed() && !highly_editable_inset) {
 827                                 change_running = change;
 828                                 change_last_x = int(x_);
 829                         } else
 830                                 change_running.setUnchanged();
 831                 }
 832
 833                 if (body_pos > 0 && pos == body_pos - 1) {
 834                         int const lwidth = theFontMetrics(labelFont())
 835                                 .width(layout.labelsep);
 836
 837                         x_ += row_.label_hfill + lwidth - width_pos;
 838                 }
 839
 840                 // Is the inline completion in front of character?
 841                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 842                         paintInlineCompletion(font);
 843
 844                 if (par_.isSeparator(pos)) {
 845                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 846                         double const orig_x = x_;
 847                         x_ += width_pos;
 848                         if (pos >= body_pos)
 849                                 x_ += row_.separator;
 850                         paintForeignMark(orig_x, orig_font.language());
 851                         ++vpos;
 852
 853                 } else if (inset) {
 854                         // If outer row has changed, nested insets are repaint completely.
 855                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 856
 857                         bool const pi_selected = pi_.selected;
 858                         Cursor const & cur = pi_.base.bv->cursor();
 859                         if (cur.selection() && cur.text() == &text_
 860                                   && cur.normalAnchor().text() == &text_)
 861                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 862                         paintInset(inset, pos);
 863                         pi_.selected = pi_selected;
 864                         ++vpos;
 865
 866                 } else {
 867                         // paint as many characters as possible.
 868                         paintFromPos(vpos);
 869                 }
 870
 871                 // Is the inline completion after character?
 872                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 873                         paintInlineCompletion(font);
 874         }
 875
 876         // if we reach the end of a struck out range, paint it
 877         if (change_running.changed()) {
 878                 FontMetrics const & fm
 879                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 880                 int const y_bar = change_running.deleted() ?
 881                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 882                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 883                         change_running.color(), Painter::line_solid, 0.5);
 884                 change_running.setUnchanged();
 885         }
 886 }
 887
 888
 889 void RowPainter::paintInlineCompletion(Font const & font)
 890 {
 891         docstring completion = pi_.base.bv->inlineCompletion();
 892         FontInfo f = font.fontInfo();
 893         bool rtl = font.isRightToLeft();
 894
 895         // draw the unique and the non-unique completion part
 896         // Note: this is not time-critical as it is
 897         // only done once per screen.
 898         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 899         docstring s1 = completion.substr(0, uniqueTo);
 900         docstring s2 = completion.substr(uniqueTo);
 901         ColorCode c1 = Color_inlinecompletion;
 902         ColorCode c2 = Color_nonunique_inlinecompletion;
 903
 904         // right to left?
 905         if (rtl) {
 906                 swap(s1, s2);
 907                 swap(c1, c2);
 908         }
 909
 910         if (s1.size() > 0) {
 911                 f.setColor(c1);
 912                 pi_.pain.text(int(x_), yo_, s1, f);
 913                 x_ += theFontMetrics(font).width(s1);
 914         }
 915
 916         if (s2.size() > 0) {
 917                 f.setColor(c2);
 918                 pi_.pain.text(int(x_), yo_, s2, f);
 919                 x_ += theFontMetrics(font).width(s2);
 920         }
 921 }
 922
 923 } // namespace lyx