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         // spelling correct?
 235         bool const spell_state =
 236                 lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 237
 238         char_type prev_char = 0;
 239         // collect as much similar chars as we can
 240         for (++vpos ; vpos < end ; ++vpos) {
 241                 pos = bidi_.vis2log(vpos);
 242                 if (pos < font_span.first || pos > font_span.last)
 243                         break;
 244
 245                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 246                 if (new_selection != selection)
 247                         // Selection ends or starts here.
 248                         break;
 249
 250                 bool const new_spell_state =
 251                         lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 252                 if (new_spell_state != spell_state)
 253                         // Spell checker state changed here.
 254                         break;
 255
 256                 Change const & change = par_.lookupChange(pos);
 257                 if (!change_running.isSimilarTo(change))
 258                         // Track change type or author has changed.
 259                         break;
 260
 261                 char_type c = par_.getChar(pos);
 262
 263                 if (c == '\t')
 264                         break;
 265
 266                 if (!isPrintableNonspace(c))
 267                         break;
 268
 269                 // Work-around bug #6920
 270                 // The bug can be reproduced with DejaVu font under Linux.
 271                 // The issue is that we compute the metrics character by character
 272                 // in ParagraphMetrics::singleWidth(); but we paint word by word
 273                 // for performance reason.
 274                 // Maybe a more general fix would be draw character by character
 275                 // for some predefined fonts on some platform. In arabic and
 276                 // Hebrew we already do paint this way.
 277                 if (prev_char == 'f')
 278                         break;
 279
 280                 /* Because we do our own bidi, at this point the strings are
 281                  * already in visual order. However, Qt also applies its own
 282                  * bidi algorithm to strings that it paints to the screen.
 283                  * Therefore, if we were to paint Hebrew/Arabic words as a
 284                  * single string, the letters in the words would get reversed
 285                  * again. In order to avoid that, we don't collect Hebrew/
 286                  * Arabic characters, but rather paint them one at a time.
 287                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 288                  */
 289                 if (hebrew)
 290                         break;
 291
 292                 /* FIXME: these checks are irrelevant, since 'arabic' and
 293                  * 'hebrew' alone are already going to trigger a break.
 294                  * However, this should not be removed completely, because
 295                  * if an alternative solution is found which allows grouping
 296                  * of arabic and hebrew characters, then these breaks may have
 297                  * to be re-applied.
 298
 299                 if (arabic && Encodings::isArabicComposeChar(c))
 300                         break;
 301
 302                 if (hebrew && Encodings::isHebrewComposeChar(c))
 303                         break;
 304                 */
 305
 306                 if (arabic) {
 307                         if (c == '(')
 308                                 c = ')';
 309                         else if (c == ')')
 310                                 c = '(';
 311                         c = par_.transformChar(c, pos);
 312                         /* see comment in hebrew, explaining why we break */
 313                         break;
 314                 }
 315
 316                 str.push_back(c);
 317                 prev_char = c;
 318         }
 319
 320         docstring s(&str[0], str.size());
 321
 322         if (s[0] == '\t')
 323                 s.replace(0,1,from_ascii("    "));
 324
 325         if (!selection && !change_running.changed()) {
 326                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 327                 return;
 328         }
 329
 330         FontInfo copy = font;
 331         if (change_running.changed())
 332                 copy.setPaintColor(change_running.color());
 333         else if (selection)
 334                 copy.setPaintColor(Color_selectiontext);
 335
 336         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 337 }
 338
 339
 340 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 341                 int desc)
 342 {
 343         if (!lyxrc.mark_foreign_language)
 344                 return;
 345         if (lang == latex_language)
 346                 return;
 347         if (lang == pi_.base.bv->buffer().params().language)
 348                 return;
 349
 350         int const y = yo_ + 1 + desc;
 351         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 352 }
 353
 354
 355 void RowPainter::paintMisspelledMark(double orig_x, int desc, bool changed)
 356 {
 357         // derive the offset from zoom factor specified by user in percent
 358         // if changed the misspelled marker gets placed slightly lower than normal
 359         // to avoid drawing at the same vertical offset
 360         int const offset = int(1.5 * lyxrc.zoom / 100.0); // [percent]
 361         int const y = yo_ + desc + (changed ? offset : 0);
 362         pi_.pain.line(int(orig_x), y, int(x_), y, Color_red, Painter::line_onoffdash, 1.0);
 363 }
 364
 365
 366 void RowPainter::paintFromPos(pos_type & vpos, bool changed)
 367 {
 368         pos_type const pos = bidi_.vis2log(vpos);
 369         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 370         double const orig_x = x_;
 371
 372         // usual characters, no insets
 373         char_type const c = par_.getChar(pos);
 374
 375         // special case languages
 376         string const & lang = orig_font.language()->lang();
 377         bool const hebrew = lang == "hebrew";
 378         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 379                                                 lang == "farsi";
 380
 381         // spelling correct?
 382         bool const misspelled_ =
 383                 lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 384
 385         // draw as many chars as we can
 386         if ((!hebrew && !arabic)
 387                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 388                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 389                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 390         } else if (hebrew) {
 391                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 392         } else if (arabic) {
 393                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 394         }
 395
 396         paintForeignMark(orig_x, orig_font.language());
 397
 398         if (lyxrc.spellcheck_continuously && misspelled_) {
 399                 paintMisspelledMark(orig_x, 2, changed);
 400         }
 401 }
 402
 403
 404 void RowPainter::paintChangeBar()
 405 {
 406         pos_type const start = row_.pos();
 407         pos_type end = row_.endpos();
 408
 409         if (par_.size() == end) {
 410                 // this is the last row of the paragraph;
 411                 // thus, we must also consider the imaginary end-of-par character
 412                 end++;
 413         }
 414
 415         if (start == end || !par_.isChanged(start, end))
 416                 return;
 417
 418         int const height = text_metrics_.isLastRow(pit_, row_)
 419                 ? row_.ascent()
 420                 : row_.height();
 421
 422         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 423 }
 424
 425
 426 void RowPainter::paintAppendix()
 427 {
 428         // only draw the appendix frame once (for the main text)
 429         if (!par_.params().appendix() || !text_.isMainText())
 430                 return;
 431
 432         int y = yo_ - row_.ascent();
 433
 434         if (par_.params().startOfAppendix())
 435                 y += 2 * defaultRowHeight();
 436
 437         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 438         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 439 }
 440
 441
 442 void RowPainter::paintDepthBar()
 443 {
 444         depth_type const depth = par_.getDepth();
 445
 446         if (depth <= 0)
 447                 return;
 448
 449         depth_type prev_depth = 0;
 450         if (!text_metrics_.isFirstRow(pit_, row_)) {
 451                 pit_type pit2 = pit_;
 452                 if (row_.pos() == 0)
 453                         --pit2;
 454                 prev_depth = pars_[pit2].getDepth();
 455         }
 456
 457         depth_type next_depth = 0;
 458         if (!text_metrics_.isLastRow(pit_, row_)) {
 459                 pit_type pit2 = pit_;
 460                 if (row_.endpos() >= pars_[pit2].size())
 461                         ++pit2;
 462                 next_depth = pars_[pit2].getDepth();
 463         }
 464
 465         for (depth_type i = 1; i <= depth; ++i) {
 466                 int const w = nestMargin() / 5;
 467                 int x = int(xo_) + w * i;
 468                 // only consider the changebar space if we're drawing outermost text
 469                 if (text_.isMainText())
 470                         x += changebarMargin();
 471
 472                 int const starty = yo_ - row_.ascent();
 473                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 474
 475                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 476
 477                 if (i > prev_depth)
 478                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 479                 if (i > next_depth)
 480                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 481         }
 482 }
 483
 484
 485 int RowPainter::paintAppendixStart(int y)
 486 {
 487         FontInfo pb_font = sane_font;
 488         pb_font.setColor(Color_appendix);
 489         pb_font.decSize();
 490
 491         int w = 0;
 492         int a = 0;
 493         int d = 0;
 494
 495         docstring const label = _("Appendix");
 496         theFontMetrics(pb_font).rectText(label, w, a, d);
 497
 498         int const text_start = int(xo_ + (width_ - w) / 2);
 499         int const text_end = text_start + w;
 500
 501         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 502
 503         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 504         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 505
 506         return 3 * defaultRowHeight();
 507 }
 508
 509
 510 void RowPainter::paintFirst()
 511 {
 512         ParagraphParameters const & pparams = par_.params();
 513         Buffer const & buffer = pi_.base.bv->buffer();
 514         BufferParams const & bparams = buffer.params();
 515         Layout const & layout = par_.layout();
 516
 517         int y_top = 0;
 518
 519         // start of appendix?
 520         if (pparams.startOfAppendix())
 521                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 522
 523         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 524                 && pit_ != 0) {
 525                 if (layout.latextype == LATEX_PARAGRAPH
 526                     && !par_.getDepth()) {
 527                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 528                 } else {
 529                         Layout const & playout = pars_[pit_ - 1].layout();
 530                         if (playout.latextype == LATEX_PARAGRAPH
 531                             && !pars_[pit_ - 1].getDepth()) {
 532                                 // is it right to use defskip here, too? (AS)
 533                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 534                         }
 535                 }
 536         }
 537
 538         bool const is_rtl = text_.isRTL(par_);
 539         bool const is_seq = text_.isFirstInSequence(pit_);
 540         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 541
 542         // should we print a label?
 543         if (layout.labeltype >= LABEL_STATIC
 544             && (layout.labeltype != LABEL_STATIC
 545                       || layout.latextype != LATEX_ENVIRONMENT
 546                       || is_seq)) {
 547
 548                 FontInfo const font = labelFont();
 549                 FontMetrics const & fm = theFontMetrics(font);
 550
 551                 docstring const str = par_.labelString();
 552                 if (!str.empty()) {
 553                         double x = x_;
 554
 555                         // this is special code for the chapter layout. This is
 556                         // printed in an extra row and has a pagebreak at
 557                         // the top.
 558                         if (layout.counter == "chapter") {
 559                                 double spacing_val = 1.0;
 560                                 if (!pparams.spacing().isDefault()) {
 561                                         spacing_val = pparams.spacing().getValue();
 562                                 } else {
 563                                         spacing_val = bparams.spacing().getValue();
 564                                 }
 565
 566                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 567
 568                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 569                                         + int(layout.parsep) * defaultRowHeight();
 570
 571                                 if (is_rtl) {
 572                                         x = width_ - leftMargin() -
 573                                                 fm.width(str);
 574                                 }
 575
 576                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 577                         } else {
 578                                 if (is_rtl) {
 579                                         x = width_ - leftMargin()
 580                                                 + fm.width(layout.labelsep);
 581                                 } else {
 582                                         x = x_ - fm.width(layout.labelsep)
 583                                                 - fm.width(str);
 584                                 }
 585
 586                                 pi_.pain.text(int(x), yo_, str, font);
 587                         }
 588                 }
 589
 590         // the labels at the top of an environment.
 591         // More or less for bibliography
 592         } else if (is_seq &&
 593                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 594                 layout.labeltype == LABEL_BIBLIO ||
 595                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 596                 FontInfo const font = labelFont();
 597                 docstring const str = par_.labelString();
 598                 if (!str.empty()) {
 599                         double spacing_val = 1.0;
 600                         if (!pparams.spacing().isDefault())
 601                                 spacing_val = pparams.spacing().getValue();
 602                         else
 603                                 spacing_val = bparams.spacing().getValue();
 604
 605                         FontMetrics const & fm = theFontMetrics(font);
 606
 607                         int const labeladdon = int(fm.maxHeight()
 608                                 * layout.spacing.getValue() * spacing_val);
 609
 610                         int maxdesc =
 611                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 612                                 + (layout.labelbottomsep * defaultRowHeight()));
 613
 614                         double x = x_;
 615                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 616                                 if (is_rtl)
 617                                         x = leftMargin();
 618                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 619                                 x -= fm.width(str) / 2;
 620                         } else if (is_rtl) {
 621                                 x = width_ - leftMargin() -     fm.width(str);
 622                         }
 623                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 624                 }
 625         }
 626 }
 627
 628
 629 /** Check if the current paragraph is the last paragraph in a
 630     proof environment */
 631 static int getEndLabel(pit_type p, Text const & text)
 632 {
 633         ParagraphList const & pars = text.paragraphs();
 634         pit_type pit = p;
 635         depth_type par_depth = pars[p].getDepth();
 636         while (pit != pit_type(pars.size())) {
 637                 Layout const & layout = pars[pit].layout();
 638                 int const endlabeltype = layout.endlabeltype;
 639
 640                 if (endlabeltype != END_LABEL_NO_LABEL) {
 641                         if (p + 1 == pit_type(pars.size()))
 642                                 return endlabeltype;
 643
 644                         depth_type const next_depth =
 645                                 pars[p + 1].getDepth();
 646                         if (par_depth > next_depth ||
 647                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 648                                 return endlabeltype;
 649                         break;
 650                 }
 651                 if (par_depth == 0)
 652                         break;
 653                 pit = text.outerHook(pit);
 654                 if (pit != pit_type(pars.size()))
 655                         par_depth = pars[pit].getDepth();
 656         }
 657         return END_LABEL_NO_LABEL;
 658 }
 659
 660
 661 void RowPainter::paintLast()
 662 {
 663         bool const is_rtl = text_.isRTL(par_);
 664         int const endlabel = getEndLabel(pit_, text_);
 665
 666         // paint imaginary end-of-paragraph character
 667
 668         Change const & change = par_.lookupChange(par_.size());
 669         if (change.changed()) {
 670                 FontMetrics const & fm =
 671                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 672                 int const length = fm.maxAscent() / 2;
 673                 Color col = change.color();
 674
 675                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 676                            Painter::line_solid, 3);
 677
 678                 if (change.deleted()) {
 679                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 680                                 yo_ + 2, col, Painter::line_solid, 3);
 681                 } else {
 682                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 683                                 yo_ + 2, col, Painter::line_solid, 3);
 684                 }
 685         }
 686
 687         // draw an endlabel
 688
 689         switch (endlabel) {
 690         case END_LABEL_BOX:
 691         case END_LABEL_FILLED_BOX: {
 692                 FontInfo const font = labelFont();
 693                 FontMetrics const & fm = theFontMetrics(font);
 694                 int const size = int(0.75 * fm.maxAscent());
 695                 int const y = yo_ - size;
 696                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 697                 int x = is_rtl ? nestMargin() + changebarMargin()
 698                         : max_row_width - text_metrics_.rightMargin(pm_);
 699
 700                 // If needed, move the box a bit to avoid overlapping with text.
 701                 int const rem = max_row_width - row_.width();
 702                 if (rem <= 0)
 703                         x += is_rtl ? rem : - rem;
 704
 705                 if (endlabel == END_LABEL_BOX)
 706                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 707                 else
 708                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 709                 break;
 710         }
 711
 712         case END_LABEL_STATIC: {
 713                 FontInfo const font = labelFont();
 714                 FontMetrics const & fm = theFontMetrics(font);
 715                 docstring const & str = par_.layout().endlabelstring();
 716                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 717                 pi_.pain.text(int(x), yo_, str, font);
 718                 break;
 719         }
 720
 721         case END_LABEL_NO_LABEL:
 722                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 723                         docstring const s = docstring(1, char_type(0x00B6));
 724                         FontInfo f = FontInfo();
 725                         FontMetrics const & fm = theFontMetrics(f);
 726                         f.setColor(Color_paragraphmarker);
 727                         pi_.pain.text(int(x_), yo_, s, f);
 728                         x_ += fm.width(s);
 729                 }
 730                 break;
 731         }
 732 }
 733
 734
 735 void RowPainter::paintOnlyInsets()
 736 {
 737         CoordCache const & cache = pi_.base.bv->coordCache();
 738         pos_type const end = row_.endpos();
 739         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 740                 // If outer row has changed, nested insets are repaint completely.
 741                 Inset const * inset = par_.getInset(pos);
 742                 if (!inset)
 743                         continue;
 744                 if (x_ > pi_.base.bv->workWidth()
 745                     || !cache.getInsets().has(inset))
 746                         continue;
 747                 x_ = cache.getInsets().x(inset);
 748
 749                 bool const pi_selected = pi_.selected;
 750                 Cursor const & cur = pi_.base.bv->cursor();
 751                 if (cur.selection() && cur.text() == &text_
 752                           && cur.normalAnchor().text() == &text_)
 753                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 754                 paintInset(inset, pos);
 755                 pi_.selected = pi_selected;
 756         }
 757 }
 758
 759
 760 void RowPainter::paintText()
 761 {
 762         pos_type const end = row_.endpos();
 763         // Spaces at logical line breaks in bidi text must be skipped during
 764         // painting. However, they may appear visually in the middle
 765         // of a row; they must be skipped, wherever they are...
 766         // * logically "abc_[HEBREW_\nHEBREW]"
 767         // * visually "abc_[_WERBEH\nWERBEH]"
 768         pos_type skipped_sep_vpos = -1;
 769         pos_type body_pos = par_.beginOfBody();
 770         if (body_pos > 0 &&
 771                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 772                 body_pos = 0;
 773         }
 774
 775         Layout const & layout = par_.layout();
 776
 777         Change change_running;
 778         int change_last_x = 0;
 779
 780         // check for possible inline completion
 781         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 782         pos_type inlineCompletionVPos = -1;
 783         if (inlineCompletionPos.inTexted()
 784             && inlineCompletionPos.text() == &text_
 785             && inlineCompletionPos.pit() == pit_
 786             && inlineCompletionPos.pos() - 1 >= row_.pos()
 787             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 788                 // draw logically behind the previous character
 789                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 790         }
 791
 792         // Use font span to speed things up, see below
 793         FontSpan font_span;
 794         Font font;
 795
 796         // If the last logical character is a separator, don't paint it, unless
 797         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 798         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 799                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 800
 801         for (pos_type vpos = row_.pos(); vpos < end; ) {
 802                 if (x_ > pi_.base.bv->workWidth())
 803                         break;
 804
 805                 // Skip the separator at the logical end of the row
 806                 if (vpos == skipped_sep_vpos) {
 807                         ++vpos;
 808                         continue;
 809                 }
 810
 811                 pos_type const pos = bidi_.vis2log(vpos);
 812
 813                 if (pos >= par_.size()) {
 814                         ++vpos;
 815                         continue;
 816                 }
 817
 818                 // Use font span to speed things up, see above
 819                 if (vpos < font_span.first || vpos > font_span.last) {
 820                         font_span = par_.fontSpan(vpos);
 821                         font = text_metrics_.displayFont(pit_, vpos);
 822
 823                         // split font span if inline completion is inside
 824                         if (font_span.first <= inlineCompletionVPos
 825                             && font_span.last > inlineCompletionVPos)
 826                                 font_span.last = inlineCompletionVPos;
 827                 }
 828
 829                 const int width_pos = pm_.singleWidth(pos, font);
 830
 831                 if (x_ + width_pos < 0) {
 832                         x_ += width_pos;
 833                         ++vpos;
 834                         continue;
 835                 }
 836                 Change const & change = par_.lookupChange(pos);
 837                 if (change.changed() && !change_running.changed()) {
 838                         change_running = change;
 839                         change_last_x = int(x_);
 840                 }
 841
 842                 Inset const * inset = par_.getInset(pos);
 843                 bool const highly_editable_inset = inset
 844                         && inset->editable();
 845
 846                 // If we reach the end of a change or if the author changes, paint it.
 847                 // We also don't paint across things like tables
 848                 if (change_running.changed() && (highly_editable_inset
 849                         || !change.changed() || !change_running.isSimilarTo(change))) {
 850                         // Calculate 1/3 height of the buffer's default font
 851                         FontMetrics const & fm
 852                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 853                         int const y_bar = change_running.deleted() ?
 854                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 855                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 856                                 change_running.color(), Painter::line_solid, 0.5);
 857
 858                         // Change might continue with a different author or type
 859                         if (change.changed() && !highly_editable_inset) {
 860                                 change_running = change;
 861                                 change_last_x = int(x_);
 862                         } else
 863                                 change_running.setUnchanged();
 864                 }
 865
 866                 if (body_pos > 0 && pos == body_pos - 1) {
 867                         int const lwidth = theFontMetrics(labelFont())
 868                                 .width(layout.labelsep);
 869
 870                         x_ += row_.label_hfill + lwidth - width_pos;
 871                 }
 872
 873                 // Is the inline completion in front of character?
 874                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 875                         paintInlineCompletion(font);
 876
 877                 if (par_.isSeparator(pos)) {
 878                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 879                         double const orig_x = x_;
 880                         x_ += width_pos;
 881                         if (pos >= body_pos)
 882                                 x_ += row_.separator;
 883                         paintForeignMark(orig_x, orig_font.language());
 884                         ++vpos;
 885
 886                 } else if (inset) {
 887                         // If outer row has changed, nested insets are repaint completely.
 888                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 889
 890                         bool const pi_selected = pi_.selected;
 891                         Cursor const & cur = pi_.base.bv->cursor();
 892                         if (cur.selection() && cur.text() == &text_
 893                                   && cur.normalAnchor().text() == &text_)
 894                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 895                         paintInset(inset, pos);
 896                         pi_.selected = pi_selected;
 897                         ++vpos;
 898
 899                 } else {
 900                         // paint as many characters as possible.
 901                         paintFromPos(vpos, change_running.changed());
 902                 }
 903
 904                 // Is the inline completion after character?
 905                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 906                         paintInlineCompletion(font);
 907         }
 908
 909         // if we reach the end of a struck out range, paint it
 910         if (change_running.changed()) {
 911                 FontMetrics const & fm
 912                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 913                 int const y_bar = change_running.deleted() ?
 914                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 915                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 916                         change_running.color(), Painter::line_solid, 0.5);
 917                 change_running.setUnchanged();
 918         }
 919 }
 920
 921
 922 void RowPainter::paintInlineCompletion(Font const & font)
 923 {
 924         docstring completion = pi_.base.bv->inlineCompletion();
 925         FontInfo f = font.fontInfo();
 926         bool rtl = font.isRightToLeft();
 927
 928         // draw the unique and the non-unique completion part
 929         // Note: this is not time-critical as it is
 930         // only done once per screen.
 931         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 932         docstring s1 = completion.substr(0, uniqueTo);
 933         docstring s2 = completion.substr(uniqueTo);
 934         ColorCode c1 = Color_inlinecompletion;
 935         ColorCode c2 = Color_nonunique_inlinecompletion;
 936
 937         // right to left?
 938         if (rtl) {
 939                 swap(s1, s2);
 940                 swap(c1, c2);
 941         }
 942
 943         if (s1.size() > 0) {
 944                 f.setColor(c1);
 945                 pi_.pain.text(int(x_), yo_, s1, f);
 946                 x_ += theFontMetrics(font).width(s1);
 947         }
 948
 949         if (s2.size() > 0) {
 950                 f.setColor(c2);
 951                 pi_.pain.text(int(x_), yo_, s2, f);
 952                 x_ += theFontMetrics(font).width(s2);
 953         }
 954 }
 955
 956 } // namespace lyx