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