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 "mathed/InsetMath.h"
  42
  43 #include "support/debug.h"
  44 #include "support/gettext.h"
  45 #include "support/textutils.h"
  46
  47 #include "support/lassert.h"
  48 #include <boost/crc.hpp>
  49
  50 using namespace std;
  51
  52 namespace lyx {
  53
  54 using frontend::Painter;
  55 using frontend::FontMetrics;
  56
  57 RowPainter::RowPainter(PainterInfo & pi,
  58         Text const & text, pit_type pit, Row const & row, Bidi & bidi, int x, int y)
  59         : pi_(pi), text_(text),
  60           text_metrics_(pi_.base.bv->textMetrics(&text)),
  61           pars_(text.paragraphs()),
  62           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  63           pm_(text_metrics_.parMetrics(pit)),
  64           bidi_(bidi), change_(pi_.change_),
  65           xo_(x), yo_(y), width_(text_metrics_.width()),
  66           line_thickness_(1.0), line_offset_(2)
  67 {
  68         bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
  69
  70         if (lyxrc.zoom >= 100) {
  71                 // derive the line thickness from zoom factor
  72                 // the zoom is given in percent
  73                 // (increase thickness at 150%, 250% etc.)
  74                 line_thickness_ = (float)(int((lyxrc.zoom + 50) / 100.0));
  75                 // adjust line_offset_ too
  76                 line_offset_ = int(2 * line_thickness_) + 1;
  77         }
  78
  79         x_ = row_.x + xo_;
  80
  81         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  82         //row_.dump();
  83
  84         LASSERT(pit >= 0, /**/);
  85         LASSERT(pit < int(text.paragraphs().size()), /**/);
  86 }
  87
  88
  89 FontInfo RowPainter::labelFont() const
  90 {
  91         FontInfo f = text_.labelFont(par_);
  92         // selected text?
  93         if (row_.begin_margin_sel || pi_.selected)
  94                 f.setPaintColor(Color_selectiontext);
  95         return f;
  96 }
  97
  98
  99 int RowPainter::leftMargin() const
 100 {
 101         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
 102                 row_.pos());
 103 }
 104
 105 // If you want to debug inset metrics uncomment the following line:
 106 //#define DEBUG_METRICS
 107 // This draws green lines around each inset.
 108
 109
 110 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
 111 {
 112         Font const font = text_metrics_.displayFont(pit_, pos);
 113
 114         LASSERT(inset, return);
 115         // Backup full_repaint status because some insets (InsetTabular)
 116         // requires a full repaint
 117         bool pi_full_repaint = pi_.full_repaint;
 118
 119         // FIXME: We should always use font, see documentation of
 120         // noFontChange() in Inset.h.
 121         pi_.base.font = inset->noFontChange() ?
 122                 pi_.base.bv->buffer().params().getFont().fontInfo() :
 123                 font.fontInfo();
 124         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 125         pi_.change_ = change_.changed() ? change_ : par_.lookupChange(pos);
 126
 127         int const x1 = int(x_);
 128         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 129         // insets are painted completely. Recursive
 130         // FIXME: it is wrong to completely paint the background
 131         // if we want to do single row painting.
 132         inset->drawBackground(pi_, x1, yo_);
 133         inset->drawSelection(pi_, x1, yo_);
 134         inset->draw(pi_, x1, yo_);
 135
 136         Dimension const & dim = pm_.insetDimension(inset);
 137
 138         paintForeignMark(x_, font.language(), dim.descent());
 139
 140         x_ += dim.width();
 141
 142         // Restore full_repaint status.
 143         pi_.full_repaint = pi_full_repaint;
 144
 145 #ifdef DEBUG_METRICS
 146         int const x2 = x1 + dim.wid;
 147         int const y1 = yo_ + dim.des;
 148         int const y2 = yo_ - dim.asc;
 149         pi_.pain.line(x1, y1, x1, y2, Color_green);
 150         pi_.pain.line(x1, y1, x2, y1, Color_green);
 151         pi_.pain.line(x2, y1, x2, y2, Color_green);
 152         pi_.pain.line(x1, y2, x2, y2, Color_green);
 153 #endif
 154 }
 155
 156
 157 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 158 {
 159         pos_type pos = bidi_.vis2log(vpos);
 160
 161         docstring str;
 162
 163         // first char
 164         char_type c = par_.getChar(pos);
 165         str += c;
 166         ++vpos;
 167
 168         int const width = theFontMetrics(font).width(c);
 169         int dx = 0;
 170
 171         for (pos_type i = pos - 1; i >= 0; --i) {
 172                 c = par_.getChar(i);
 173                 if (!Encodings::isHebrewComposeChar(c)) {
 174                         if (isPrintableNonspace(c)) {
 175                                 int const width2 = pm_.singleWidth(i,
 176                                         text_metrics_.displayFont(pit_, i));
 177                                 dx = (c == 0x05e8 || // resh
 178                                       c == 0x05d3)   // dalet
 179                                         ? width2 - width
 180                                         : (width2 - width) / 2;
 181                         }
 182                         break;
 183                 }
 184         }
 185
 186         // Draw nikud
 187         pi_.pain.text(int(x_) + dx, yo_, str, font);
 188 }
 189
 190
 191 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 192 {
 193         pos_type pos = bidi_.vis2log(vpos);
 194         docstring str;
 195
 196         // first char
 197         char_type c = par_.getChar(pos);
 198         c = par_.transformChar(c, pos);
 199         str += c;
 200         ++vpos;
 201
 202         int const width = theFontMetrics(font).width(c);
 203         int dx = 0;
 204
 205         for (pos_type i = pos - 1; i >= 0; --i) {
 206                 c = par_.getChar(i);
 207                 if (!Encodings::isArabicComposeChar(c)) {
 208                         if (isPrintableNonspace(c)) {
 209                                 int const width2 = pm_.singleWidth(i,
 210                                                 text_metrics_.displayFont(pit_, i));
 211                                 dx = (width2 - width) / 2;
 212                         }
 213                         break;
 214                 }
 215         }
 216         // Draw nikud
 217         pi_.pain.text(int(x_) + dx, yo_, str, font);
 218 }
 219
 220
 221 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 222                             bool hebrew, bool arabic)
 223 {
 224         // This method takes up 70% of time when typing
 225         pos_type pos = bidi_.vis2log(vpos);
 226         // first character
 227         char_type prev_char = par_.getChar(pos);
 228         vector<char_type> str;
 229         str.reserve(100);
 230         str.push_back(prev_char);
 231
 232         if (arabic) {
 233                 char_type c = str[0];
 234                 if (c == '(')
 235                         c = ')';
 236                 else if (c == ')')
 237                         c = '(';
 238                 str[0] = par_.transformChar(c, pos);
 239         }
 240
 241         pos_type const end = row_.endpos();
 242         FontSpan const font_span = par_.fontSpan(pos);
 243         // Track-change status.
 244         Change const & change_running = par_.lookupChange(pos);
 245
 246         // selected text?
 247         bool const selection = (pos >= row_.sel_beg && pos < row_.sel_end)
 248                 || pi_.selected;
 249
 250         // spelling correct?
 251         bool const spell_state =
 252                 lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 253
 254         // collect as much similar chars as we can
 255         for (++vpos ; vpos < end ; ++vpos) {
 256                 // Work-around bug #6920
 257                 // The bug can be reproduced with DejaVu font under Linux.
 258                 // The issue is that we compute the metrics character by character
 259                 // in ParagraphMetrics::singleWidth(); but we paint word by word
 260                 // for performance reason.
 261                 // Maybe a more general fix would be draw character by character
 262                 // for some predefined fonts on some platform. In arabic and
 263                 // Hebrew we already do paint this way.
 264                 if (prev_char == 'f')
 265                         break;
 266
 267                 pos = bidi_.vis2log(vpos);
 268                 if (pos < font_span.first || pos > font_span.last)
 269                         break;
 270
 271                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 272                 if (new_selection != selection)
 273                         // Selection ends or starts here.
 274                         break;
 275
 276                 bool const new_spell_state =
 277                         lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 278                 if (new_spell_state != spell_state)
 279                         // Spell checker state changed here.
 280                         break;
 281
 282                 Change const & change = par_.lookupChange(pos);
 283                 if (!change_running.isSimilarTo(change))
 284                         // Track change type or author has changed.
 285                         break;
 286
 287                 char_type c = par_.getChar(pos);
 288
 289                 if (c == '\t')
 290                         break;
 291
 292                 if (!isPrintableNonspace(c))
 293                         break;
 294
 295                 /* Because we do our own bidi, at this point the strings are
 296                  * already in visual order. However, Qt also applies its own
 297                  * bidi algorithm to strings that it paints to the screen.
 298                  * Therefore, if we were to paint Hebrew/Arabic words as a
 299                  * single string, the letters in the words would get reversed
 300                  * again. In order to avoid that, we don't collect Hebrew/
 301                  * Arabic characters, but rather paint them one at a time.
 302                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 303                  */
 304                 if (hebrew)
 305                         break;
 306
 307                 /* FIXME: these checks are irrelevant, since 'arabic' and
 308                  * 'hebrew' alone are already going to trigger a break.
 309                  * However, this should not be removed completely, because
 310                  * if an alternative solution is found which allows grouping
 311                  * of arabic and hebrew characters, then these breaks may have
 312                  * to be re-applied.
 313
 314                 if (arabic && Encodings::isArabicComposeChar(c))
 315                         break;
 316
 317                 if (hebrew && Encodings::isHebrewComposeChar(c))
 318                         break;
 319                 */
 320
 321                 if (arabic) {
 322                         if (c == '(')
 323                                 c = ')';
 324                         else if (c == ')')
 325                                 c = '(';
 326                         c = par_.transformChar(c, pos);
 327                         /* see comment in hebrew, explaining why we break */
 328                         break;
 329                 }
 330
 331                 str.push_back(c);
 332                 prev_char = c;
 333         }
 334
 335         docstring s(&str[0], str.size());
 336
 337         if (s[0] == '\t')
 338                 s.replace(0,1,from_ascii("    "));
 339
 340         if (!selection && !change_running.changed()) {
 341                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 342                 return;
 343         }
 344
 345         FontInfo copy = font;
 346         if (change_running.changed())
 347                 copy.setPaintColor(change_running.color());
 348         else if (selection)
 349                 copy.setPaintColor(Color_selectiontext);
 350
 351         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 352 }
 353
 354
 355 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 356                 int desc)
 357 {
 358         if (!lyxrc.mark_foreign_language)
 359                 return;
 360         if (lang == latex_language)
 361                 return;
 362         if (lang == pi_.base.bv->buffer().params().language)
 363                 return;
 364
 365         int const y = yo_ + 1 + desc + int(line_thickness_/2);
 366         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language,
 367                 Painter::line_solid, line_thickness_);
 368 }
 369
 370
 371 void RowPainter::paintMisspelledMark(double orig_x, bool changed)
 372 {
 373         // if changed the misspelled marker gets placed slightly lower than normal
 374         // to avoid drawing at the same vertical offset
 375         int const y = yo_ + (changed ? int(line_thickness_ + 1.0) : 0) + line_offset_;
 376         pi_.pain.line(int(orig_x), y, int(x_), y, Color_error,
 377                 Painter::line_onoffdash, line_thickness_);
 378 }
 379
 380
 381 void RowPainter::paintFromPos(pos_type & vpos, bool changed)
 382 {
 383         pos_type const pos = bidi_.vis2log(vpos);
 384         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 385         double const orig_x = x_;
 386
 387         // usual characters, no insets
 388         char_type const c = par_.getChar(pos);
 389
 390         // special case languages
 391         string const & lang = orig_font.language()->lang();
 392         bool const hebrew = lang == "hebrew";
 393         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 394                                                 lang == "farsi";
 395
 396         // spelling correct?
 397         bool const misspelled =
 398                 lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 399
 400         // draw as many chars as we can
 401         if ((!hebrew && !arabic)
 402                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 403                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 404                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 405         } else if (hebrew) {
 406                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 407         } else if (arabic) {
 408                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 409         }
 410
 411         paintForeignMark(orig_x, orig_font.language());
 412
 413         if (lyxrc.spellcheck_continuously && misspelled) {
 414                 // check for cursor position
 415                 // don't draw misspelled marker for words at cursor position
 416                 // we don't want to disturb the process of text editing
 417                 BufferView const * bv = pi_.base.bv;
 418                 Cursor const & cur = bv->cursor();
 419                 bool current_word = false;
 420                 if (cur.inTexted() && par_.id() == cur.paragraph().id()) {
 421                         pos_type cpos = cur.pos();
 422                         if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
 423                                 --cpos;
 424                         current_word = par_.isSameSpellRange(pos, cpos) ;
 425                 }
 426                 if (!current_word)
 427                         paintMisspelledMark(orig_x, changed);
 428         }
 429 }
 430
 431
 432 void RowPainter::paintChangeBar()
 433 {
 434         pos_type const start = row_.pos();
 435         pos_type end = row_.endpos();
 436
 437         if (par_.size() == end) {
 438                 // this is the last row of the paragraph;
 439                 // thus, we must also consider the imaginary end-of-par character
 440                 end++;
 441         }
 442
 443         if (start == end || !par_.isChanged(start, end))
 444                 return;
 445
 446         int const height = text_metrics_.isLastRow(pit_, row_)
 447                 ? row_.ascent()
 448                 : row_.height();
 449
 450         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 451 }
 452
 453
 454 void RowPainter::paintAppendix()
 455 {
 456         // only draw the appendix frame once (for the main text)
 457         if (!par_.params().appendix() || !text_.isMainText())
 458                 return;
 459
 460         int y = yo_ - row_.ascent();
 461
 462         if (par_.params().startOfAppendix())
 463                 y += 2 * defaultRowHeight();
 464
 465         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 466         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 467 }
 468
 469
 470 void RowPainter::paintDepthBar()
 471 {
 472         depth_type const depth = par_.getDepth();
 473
 474         if (depth <= 0)
 475                 return;
 476
 477         depth_type prev_depth = 0;
 478         if (!text_metrics_.isFirstRow(pit_, row_)) {
 479                 pit_type pit2 = pit_;
 480                 if (row_.pos() == 0)
 481                         --pit2;
 482                 prev_depth = pars_[pit2].getDepth();
 483         }
 484
 485         depth_type next_depth = 0;
 486         if (!text_metrics_.isLastRow(pit_, row_)) {
 487                 pit_type pit2 = pit_;
 488                 if (row_.endpos() >= pars_[pit2].size())
 489                         ++pit2;
 490                 next_depth = pars_[pit2].getDepth();
 491         }
 492
 493         for (depth_type i = 1; i <= depth; ++i) {
 494                 int const w = nestMargin() / 5;
 495                 int x = int(xo_) + w * i;
 496                 // only consider the changebar space if we're drawing outermost text
 497                 if (text_.isMainText())
 498                         x += changebarMargin();
 499
 500                 int const starty = yo_ - row_.ascent();
 501                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 502
 503                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 504
 505                 if (i > prev_depth)
 506                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 507                 if (i > next_depth)
 508                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 509         }
 510 }
 511
 512
 513 int RowPainter::paintAppendixStart(int y)
 514 {
 515         FontInfo pb_font = sane_font;
 516         pb_font.setColor(Color_appendix);
 517         pb_font.decSize();
 518
 519         int w = 0;
 520         int a = 0;
 521         int d = 0;
 522
 523         docstring const label = _("Appendix");
 524         theFontMetrics(pb_font).rectText(label, w, a, d);
 525
 526         int const text_start = int(xo_ + (width_ - w) / 2);
 527         int const text_end = text_start + w;
 528
 529         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 530
 531         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 532         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 533
 534         return 3 * defaultRowHeight();
 535 }
 536
 537
 538 void RowPainter::paintFirst()
 539 {
 540         ParagraphParameters const & pparams = par_.params();
 541         Buffer const & buffer = pi_.base.bv->buffer();
 542         BufferParams const & bparams = buffer.params();
 543         Layout const & layout = par_.layout();
 544
 545         int y_top = 0;
 546
 547         // start of appendix?
 548         if (pparams.startOfAppendix())
 549                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 550
 551         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 552                 && pit_ != 0) {
 553                 if (layout.latextype == LATEX_PARAGRAPH
 554                     && !par_.getDepth()) {
 555                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 556                 } else {
 557                         Layout const & playout = pars_[pit_ - 1].layout();
 558                         if (playout.latextype == LATEX_PARAGRAPH
 559                             && !pars_[pit_ - 1].getDepth()) {
 560                                 // is it right to use defskip here, too? (AS)
 561                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 562                         }
 563                 }
 564         }
 565
 566         bool const is_rtl = text_.isRTL(par_);
 567         bool const is_seq = text_.isFirstInSequence(pit_);
 568         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 569
 570         // should we print a label?
 571         if (layout.labeltype >= LABEL_STATIC
 572             && (layout.labeltype != LABEL_STATIC
 573                       || layout.latextype != LATEX_ENVIRONMENT
 574                       || is_seq)) {
 575
 576                 FontInfo const font = labelFont();
 577                 FontMetrics const & fm = theFontMetrics(font);
 578
 579                 docstring const str = par_.labelString();
 580                 if (!str.empty()) {
 581                         double x = x_;
 582
 583                         // this is special code for the chapter layout. This is
 584                         // printed in an extra row and has a pagebreak at
 585                         // the top.
 586                         if (layout.counter == "chapter") {
 587                                 double spacing_val = 1.0;
 588                                 if (!pparams.spacing().isDefault()) {
 589                                         spacing_val = pparams.spacing().getValue();
 590                                 } else {
 591                                         spacing_val = bparams.spacing().getValue();
 592                                 }
 593
 594                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 595
 596                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 597                                         + int(layout.parsep) * defaultRowHeight();
 598
 599                                 if (is_rtl) {
 600                                         x = width_ - leftMargin() -
 601                                                 fm.width(str);
 602                                 }
 603
 604                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 605                         } else {
 606                                 if (is_rtl) {
 607                                         x = width_ - leftMargin()
 608                                                 + fm.width(layout.labelsep);
 609                                 } else {
 610                                         x = x_ - fm.width(layout.labelsep)
 611                                                 - fm.width(str);
 612                                 }
 613
 614                                 pi_.pain.text(int(x), yo_, str, font);
 615                         }
 616                 }
 617
 618         // the labels at the top of an environment.
 619         // More or less for bibliography
 620         } else if (is_seq &&
 621                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 622                 layout.labeltype == LABEL_BIBLIO ||
 623                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 624                 FontInfo const font = labelFont();
 625                 docstring const str = par_.labelString();
 626                 if (!str.empty()) {
 627                         double spacing_val = 1.0;
 628                         if (!pparams.spacing().isDefault())
 629                                 spacing_val = pparams.spacing().getValue();
 630                         else
 631                                 spacing_val = bparams.spacing().getValue();
 632
 633                         FontMetrics const & fm = theFontMetrics(font);
 634
 635                         int const labeladdon = int(fm.maxHeight()
 636                                 * layout.spacing.getValue() * spacing_val);
 637
 638                         int maxdesc =
 639                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 640                                 + (layout.labelbottomsep * defaultRowHeight()));
 641
 642                         double x = x_;
 643                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 644                                 if (is_rtl)
 645                                         x = leftMargin();
 646                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 647                                 x -= fm.width(str) / 2;
 648                         } else if (is_rtl) {
 649                                 x = width_ - leftMargin() -     fm.width(str);
 650                         }
 651                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 652                 }
 653         }
 654 }
 655
 656
 657 /** Check if the current paragraph is the last paragraph in a
 658     proof environment */
 659 static int getEndLabel(pit_type p, Text const & text)
 660 {
 661         ParagraphList const & pars = text.paragraphs();
 662         pit_type pit = p;
 663         depth_type par_depth = pars[p].getDepth();
 664         while (pit != pit_type(pars.size())) {
 665                 Layout const & layout = pars[pit].layout();
 666                 int const endlabeltype = layout.endlabeltype;
 667
 668                 if (endlabeltype != END_LABEL_NO_LABEL) {
 669                         if (p + 1 == pit_type(pars.size()))
 670                                 return endlabeltype;
 671
 672                         depth_type const next_depth =
 673                                 pars[p + 1].getDepth();
 674                         if (par_depth > next_depth ||
 675                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 676                                 return endlabeltype;
 677                         break;
 678                 }
 679                 if (par_depth == 0)
 680                         break;
 681                 pit = text.outerHook(pit);
 682                 if (pit != pit_type(pars.size()))
 683                         par_depth = pars[pit].getDepth();
 684         }
 685         return END_LABEL_NO_LABEL;
 686 }
 687
 688
 689 void RowPainter::paintLast()
 690 {
 691         bool const is_rtl = text_.isRTL(par_);
 692         int const endlabel = getEndLabel(pit_, text_);
 693
 694         // paint imaginary end-of-paragraph character
 695
 696         Change const & change = par_.lookupChange(par_.size());
 697         if (change.changed()) {
 698                 FontMetrics const & fm =
 699                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 700                 int const length = fm.maxAscent() / 2;
 701                 Color col = change.color();
 702
 703                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 704                            Painter::line_solid, 3);
 705
 706                 if (change.deleted()) {
 707                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 708                                 yo_ + 2, col, Painter::line_solid, 3);
 709                 } else {
 710                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 711                                 yo_ + 2, col, Painter::line_solid, 3);
 712                 }
 713         }
 714
 715         // draw an endlabel
 716
 717         switch (endlabel) {
 718         case END_LABEL_BOX:
 719         case END_LABEL_FILLED_BOX: {
 720                 FontInfo const font = labelFont();
 721                 FontMetrics const & fm = theFontMetrics(font);
 722                 int const size = int(0.75 * fm.maxAscent());
 723                 int const y = yo_ - size;
 724                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 725                 int x = is_rtl ? nestMargin() + changebarMargin()
 726                         : max_row_width - text_metrics_.rightMargin(pm_);
 727
 728                 // If needed, move the box a bit to avoid overlapping with text.
 729                 int const rem = max_row_width - row_.width();
 730                 if (rem <= 0)
 731                         x += is_rtl ? rem : - rem;
 732
 733                 if (endlabel == END_LABEL_BOX)
 734                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 735                 else
 736                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 737                 break;
 738         }
 739
 740         case END_LABEL_STATIC: {
 741                 FontInfo const font = labelFont();
 742                 FontMetrics const & fm = theFontMetrics(font);
 743                 docstring const & str = par_.layout().endlabelstring();
 744                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 745                 pi_.pain.text(int(x), yo_, str, font);
 746                 break;
 747         }
 748
 749         case END_LABEL_NO_LABEL:
 750                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 751                         docstring const s = docstring(1, char_type(0x00B6));
 752                         FontInfo f = FontInfo();
 753                         FontMetrics const & fm = theFontMetrics(f);
 754                         f.setColor(Color_paragraphmarker);
 755                         pi_.pain.text(int(x_), yo_, s, f);
 756                         x_ += fm.width(s);
 757                 }
 758                 break;
 759         }
 760 }
 761
 762
 763 void RowPainter::paintOnlyInsets()
 764 {
 765         CoordCache const & cache = pi_.base.bv->coordCache();
 766         pos_type const end = row_.endpos();
 767         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 768                 // If outer row has changed, nested insets are repaint completely.
 769                 Inset const * inset = par_.getInset(pos);
 770                 bool const nested_inset = inset &&
 771                                 ((inset->asInsetMath() &&
 772                                   !inset->asInsetMath()->asMacroTemplate())
 773                                  || inset->asInsetText()
 774                                  || inset->asInsetTabular());
 775                 if (!nested_inset)
 776                         continue;
 777                 if (x_ > pi_.base.bv->workWidth()
 778                     || !cache.getInsets().has(inset))
 779                         continue;
 780                 x_ = cache.getInsets().x(inset);
 781
 782                 bool const pi_selected = pi_.selected;
 783                 Cursor const & cur = pi_.base.bv->cursor();
 784                 if (cur.selection() && cur.text() == &text_
 785                           && cur.normalAnchor().text() == &text_)
 786                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 787                 paintInset(inset, pos);
 788                 pi_.selected = pi_selected;
 789         }
 790 }
 791
 792
 793 void RowPainter::paintText()
 794 {
 795         pos_type const end = row_.endpos();
 796         // Spaces at logical line breaks in bidi text must be skipped during
 797         // painting. However, they may appear visually in the middle
 798         // of a row; they must be skipped, wherever they are...
 799         // * logically "abc_[HEBREW_\nHEBREW]"
 800         // * visually "abc_[_WERBEH\nWERBEH]"
 801         pos_type skipped_sep_vpos = -1;
 802         pos_type body_pos = par_.beginOfBody();
 803         if (body_pos > 0 &&
 804                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 805                 body_pos = 0;
 806         }
 807
 808         Layout const & layout = par_.layout();
 809
 810         Change change_running;
 811         int change_last_x = 0;
 812
 813         // check for possible inline completion
 814         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 815         pos_type inlineCompletionVPos = -1;
 816         if (inlineCompletionPos.inTexted()
 817             && inlineCompletionPos.text() == &text_
 818             && inlineCompletionPos.pit() == pit_
 819             && inlineCompletionPos.pos() - 1 >= row_.pos()
 820             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 821                 // draw logically behind the previous character
 822                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 823         }
 824
 825         // Use font span to speed things up, see below
 826         FontSpan font_span;
 827         Font font;
 828
 829         // If the last logical character is a separator, don't paint it, unless
 830         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 831         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 832                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 833
 834         for (pos_type vpos = row_.pos(); vpos < end; ) {
 835                 if (x_ > pi_.base.bv->workWidth())
 836                         break;
 837
 838                 // Skip the separator at the logical end of the row
 839                 if (vpos == skipped_sep_vpos) {
 840                         ++vpos;
 841                         continue;
 842                 }
 843
 844                 pos_type const pos = bidi_.vis2log(vpos);
 845
 846                 if (pos >= par_.size()) {
 847                         ++vpos;
 848                         continue;
 849                 }
 850
 851                 // Use font span to speed things up, see above
 852                 if (vpos < font_span.first || vpos > font_span.last) {
 853                         font_span = par_.fontSpan(vpos);
 854                         font = text_metrics_.displayFont(pit_, vpos);
 855
 856                         // split font span if inline completion is inside
 857                         if (font_span.first <= inlineCompletionVPos
 858                             && font_span.last > inlineCompletionVPos)
 859                                 font_span.last = inlineCompletionVPos;
 860                 }
 861
 862                 const int width_pos = pm_.singleWidth(pos, font);
 863
 864                 if (x_ + width_pos < 0) {
 865                         x_ += width_pos;
 866                         ++vpos;
 867                         continue;
 868                 }
 869                 Change const & change = par_.lookupChange(pos);
 870                 if (change.changed() && !change_running.changed()) {
 871                         change_running = change;
 872                         change_last_x = int(x_);
 873                 }
 874
 875                 Inset const * inset = par_.getInset(pos);
 876                 bool const highly_editable_inset = inset
 877                         && inset->editable();
 878
 879                 // If we reach the end of a change or if the author changes, paint it.
 880                 // We also don't paint across things like tables
 881                 if (change_running.changed() && (highly_editable_inset
 882                         || !change.changed() || !change_running.isSimilarTo(change))) {
 883                         // Calculate 1/3 height of the buffer's default font
 884                         FontMetrics const & fm
 885                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 886                         int const y_bar = change_running.deleted() ?
 887                                 yo_ - fm.maxAscent() / 3 : yo_ + line_offset_;
 888                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 889                                 change_running.color(), Painter::line_solid, line_thickness_);
 890
 891                         // Change might continue with a different author or type
 892                         if (change.changed() && !highly_editable_inset) {
 893                                 change_running = change;
 894                                 change_last_x = int(x_);
 895                         } else
 896                                 change_running.setUnchanged();
 897                 }
 898
 899                 if (body_pos > 0 && pos == body_pos - 1) {
 900                         int const lwidth = theFontMetrics(labelFont())
 901                                 .width(layout.labelsep);
 902
 903                         x_ += row_.label_hfill + lwidth - width_pos;
 904                 }
 905
 906                 // Is the inline completion in front of character?
 907                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 908                         paintInlineCompletion(font);
 909
 910                 if (par_.isSeparator(pos)) {
 911                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 912                         double const orig_x = x_;
 913                         x_ += width_pos;
 914                         if (pos >= body_pos)
 915                                 x_ += row_.separator;
 916                         paintForeignMark(orig_x, orig_font.language());
 917                         ++vpos;
 918
 919                 } else if (inset) {
 920                         // If outer row has changed, nested insets are repaint completely.
 921                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 922
 923                         bool const pi_selected = pi_.selected;
 924                         Cursor const & cur = pi_.base.bv->cursor();
 925                         if (cur.selection() && cur.text() == &text_
 926                                   && cur.normalAnchor().text() == &text_)
 927                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 928                         paintInset(inset, pos);
 929                         pi_.selected = pi_selected;
 930                         ++vpos;
 931
 932                 } else {
 933                         // paint as many characters as possible.
 934                         paintFromPos(vpos, change_running.changed());
 935                 }
 936
 937                 // Is the inline completion after character?
 938                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 939                         paintInlineCompletion(font);
 940         }
 941
 942         // if we reach the end of a struck out range, paint it
 943         if (change_running.changed()) {
 944                 FontMetrics const & fm
 945                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 946                 int const y_bar = change_running.deleted() ?
 947                                 yo_ - fm.maxAscent() / 3 : yo_ + line_offset_;
 948                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 949                         change_running.color(), Painter::line_solid, line_thickness_);
 950                 change_running.setUnchanged();
 951         }
 952 }
 953
 954
 955 void RowPainter::paintSelection()
 956 {
 957         if (!row_.selection())
 958                 return;
 959         Cursor const & curs = pi_.base.bv->cursor();
 960         DocIterator beg = curs.selectionBegin();
 961         beg.pit() = pit_;
 962         beg.pos() = row_.sel_beg;
 963
 964         DocIterator end = curs.selectionEnd();
 965         end.pit() = pit_;
 966         end.pos() = row_.sel_end;
 967
 968         bool const begin_boundary = beg.pos() >= row_.endpos();
 969         bool const end_boundary = row_.sel_end == row_.endpos();
 970
 971         DocIterator cur = beg;
 972         cur.boundary(begin_boundary);
 973         int x1 = text_metrics_.cursorX(beg.top(), begin_boundary);
 974         int x2 = text_metrics_.cursorX(end.top(), end_boundary);
 975         int const y1 = yo_ - row_.ascent();
 976         int const y2 = y1 + row_.height();
 977
 978         int const rm = text_.isMainText() ? pi_.base.bv->rightMargin() : 0;
 979         int const lm = text_.isMainText() ? pi_.base.bv->leftMargin() : 0;
 980
 981         // draw the margins
 982         if (row_.begin_margin_sel) {
 983                 if (text_.isRTL(beg.paragraph())) {
 984                         pi_.pain.fillRectangle(int(xo_ + x1), y1,
 985                                 text_metrics_.width() - rm - x1, y2 - y1, Color_selection);
 986                 } else {
 987                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x1 - lm, y2 - y1,
 988                                 Color_selection);
 989                 }
 990         }
 991
 992         if (row_.end_margin_sel) {
 993                 if (text_.isRTL(beg.paragraph())) {
 994                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x2 - lm, y2 - y1,
 995                                 Color_selection);
 996                 } else {
 997                         pi_.pain.fillRectangle(int(xo_ + x2), y1, text_metrics_.width() - rm - x2,
 998                                 y2 - y1, Color_selection);
 999                 }
1000         }
1001
1002         // if we are on a boundary from the beginning, it's probably
1003         // a RTL boundary and we jump to the other side directly as this
1004         // segement is 0-size and confuses the logic below
1005         if (cur.boundary())
1006                 cur.boundary(false);
1007
1008         // go through row and draw from RTL boundary to RTL boundary
1009         while (cur < end) {
1010                 bool draw_now = false;
1011
1012                 // simplified cursorForward code below which does not
1013                 // descend into insets and which does not go into the
1014                 // next line. Compare the logic with the original cursorForward
1015
1016                 // if left of boundary -> just jump to right side, but
1017                 // for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
1018                 if (cur.boundary()) {
1019                         cur.boundary(false);
1020                 }       else if (text_metrics_.isRTLBoundary(cur.pit(), cur.pos() + 1)) {
1021                         // in front of RTL boundary -> Stay on this side of the boundary
1022                         // because:  ab|cDDEEFFghi -> abc|DDEEFFghi
1023                         ++cur.pos();
1024                         cur.boundary(true);
1025                         draw_now = true;
1026                 } else {
1027                         // move right
1028                         ++cur.pos();
1029
1030                         // line end?
1031                         if (cur.pos() == row_.endpos())
1032                                 cur.boundary(true);
1033                 }
1034
1035                 if (x1 == -1) {
1036                         // the previous segment was just drawn, now the next starts
1037                         x1 = text_metrics_.cursorX(cur.top(), cur.boundary());
1038                 }
1039
1040                 if (!(cur < end) || draw_now) {
1041                         x2 = text_metrics_.cursorX(cur.top(), cur.boundary());
1042                         pi_.pain.fillRectangle(int(xo_ + min(x1, x2)), y1, abs(x2 - x1),
1043                                 y2 - y1, Color_selection);
1044
1045                         // reset x1, so it is set again next round (which will be on the
1046                         // right side of a boundary or at the selection end)
1047                         x1 = -1;
1048                 }
1049         }
1050 }
1051
1052
1053 void RowPainter::paintInlineCompletion(Font const & font)
1054 {
1055         docstring completion = pi_.base.bv->inlineCompletion();
1056         FontInfo f = font.fontInfo();
1057         bool rtl = font.isRightToLeft();
1058
1059         // draw the unique and the non-unique completion part
1060         // Note: this is not time-critical as it is
1061         // only done once per screen.
1062         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
1063         docstring s1 = completion.substr(0, uniqueTo);
1064         docstring s2 = completion.substr(uniqueTo);
1065         ColorCode c1 = Color_inlinecompletion;
1066         ColorCode c2 = Color_nonunique_inlinecompletion;
1067
1068         // right to left?
1069         if (rtl) {
1070                 swap(s1, s2);
1071                 swap(c1, c2);
1072         }
1073
1074         if (s1.size() > 0) {
1075                 f.setColor(c1);
1076                 pi_.pain.text(int(x_), yo_, s1, f);
1077                 x_ += theFontMetrics(font).width(s1);
1078         }
1079
1080         if (s2.size() > 0) {
1081                 f.setColor(c2);
1082                 pi_.pain.text(int(x_), yo_, s2, f);
1083                 x_ += theFontMetrics(font).width(s2);
1084         }
1085 }
1086
1087 } // namespace lyx