src/rowpainter.C

   1 /**
   2  * \file rowpainter.C
   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
  14 #include "rowpainter.h"
  15
  16 #include "buffer.h"
  17 #include "coordcache.h"
  18 #include "cursor.h"
  19 #include "debug.h"
  20 #include "bufferparams.h"
  21 #include "BufferView.h"
  22 #include "encoding.h"
  23 #include "gettext.h"
  24 #include "language.h"
  25 #include "LColor.h"
  26 #include "lyxrc.h"
  27 #include "lyxrow.h"
  28 #include "lyxrow_funcs.h"
  29 #include "metricsinfo.h"
  30 #include "paragraph.h"
  31 #include "paragraph_funcs.h"
  32 #include "ParagraphParameters.h"
  33 #include "vspace.h"
  34
  35 #include "frontends/font_metrics.h"
  36 #include "frontends/nullpainter.h"
  37 #include "frontends/Painter.h"
  38
  39 #include "insets/insettext.h"
  40
  41 #include "support/textutils.h"
  42
  43 using lyx::pos_type;
  44 using lyx::pit_type;
  45
  46 using std::endl;
  47 using std::max;
  48 using std::min;
  49 using std::string;
  50
  51
  52 namespace {
  53
  54 /**
  55  * A class used for painting an individual row of text.
  56  */
  57 class RowPainter {
  58 public:
  59         /// initialise and run painter
  60         RowPainter(PainterInfo & pi, LyXText const & text,
  61                 pit_type pit, Row const & row, int x, int y);
  62
  63         // paint various parts
  64         void paintAppendix();
  65         void paintDepthBar();
  66         void paintChangeBar();
  67         void paintFirst();
  68         void paintLast();
  69         void paintText();
  70
  71 private:
  72         void paintForeignMark(double orig_x, LyXFont const & font);
  73         void paintHebrewComposeChar(lyx::pos_type & vpos, LyXFont const & font);
  74         void paintArabicComposeChar(lyx::pos_type & vpos, LyXFont const & font);
  75         void paintChars(lyx::pos_type & vpos, LyXFont font,
  76                         bool hebrew, bool arabic);
  77         int paintAppendixStart(int y);
  78         void paintFromPos(lyx::pos_type & vpos);
  79         void paintInset(lyx::pos_type const pos, LyXFont const & font);
  80
  81         /// return left margin
  82         int leftMargin() const;
  83
  84         /// return the label font for this row
  85         LyXFont const getLabelFont() const;
  86
  87         /// bufferview to paint on
  88         BufferView const & bv_;
  89
  90         /// Painter to use
  91         Painter & pain_;
  92
  93         /// LyXText for the row
  94         LyXText const & text_;
  95         ParagraphList const & pars_;
  96
  97         /// The row to paint
  98         Row const & row_;
  99
 100         /// Row's paragraph
 101         pit_type const pit_;
 102         Paragraph const & par_;
 103
 104         /// is row erased? (change tracking)
 105         bool erased_;
 106
 107         // Looks ugly - is
 108         double const xo_;
 109         int const yo_;    // current baseline
 110         double x_;
 111         int width_;
 112         double separator_;
 113         double hfill_;
 114         double label_hfill_;
 115 };
 116
 117
 118 RowPainter::RowPainter(PainterInfo & pi,
 119         LyXText const & text, pit_type pit, Row const & row, int x, int y)
 120         : bv_(*pi.base.bv), pain_(pi.pain), text_(text), pars_(text.paragraphs()),
 121           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
 122           erased_(pi.erased_),
 123           xo_(x), yo_(y), width_(text_.width())
 124 {
 125         RowMetrics m = text_.computeRowMetrics(pit, row_);
 126         x_ = m.x + xo_;
 127
 128         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
 129         //row_.dump();
 130
 131         separator_ = m.separator;
 132         hfill_ = m.hfill;
 133         label_hfill_ = m.label_hfill;
 134
 135         BOOST_ASSERT(pit >= 0);
 136         BOOST_ASSERT(pit < int(text.paragraphs().size()));
 137 }
 138
 139
 140 LyXFont const RowPainter::getLabelFont() const
 141 {
 142         return text_.getLabelFont(par_);
 143 }
 144
 145
 146 int RowPainter::leftMargin() const
 147 {
 148         return text_.leftMargin(pit_, row_.pos());
 149 }
 150
 151
 152 void RowPainter::paintInset(pos_type const pos, LyXFont const & font)
 153 {
 154         InsetBase const * inset = par_.getInset(pos);
 155         BOOST_ASSERT(inset);
 156         PainterInfo pi(const_cast<BufferView *>(&bv_), pain_);
 157         // FIXME: We should always use font, see documentation of
 158         // noFontChange() in insetbase.h.
 159         pi.base.font = inset->noFontChange() ?
 160                 bv_.buffer()->params().getLyXTextClass().defaultfont() :
 161                 font;
 162         pi.ltr_pos = (text_.bidi.level(pos) % 2 == 0);
 163         pi.erased_ = erased_ || isDeletedText(par_, pos);
 164         theCoords.insets().add(inset, int(x_), yo_);
 165         inset->drawSelection(pi, int(x_), yo_);
 166         inset->draw(pi, int(x_), yo_);
 167         x_ += inset->width();
 168 }
 169
 170
 171 void RowPainter::paintHebrewComposeChar(pos_type & vpos, LyXFont const & font)
 172 {
 173         pos_type pos = text_.bidi.vis2log(vpos);
 174
 175         string str;
 176
 177         // first char
 178         char c = par_.getChar(pos);
 179         str += c;
 180         ++vpos;
 181
 182         int const width = font_metrics::width(c, font);
 183         int dx = 0;
 184
 185         for (pos_type i = pos - 1; i >= 0; --i) {
 186                 c = par_.getChar(i);
 187                 if (!Encodings::IsComposeChar_hebrew(c)) {
 188                         if (IsPrintableNonspace(c)) {
 189                                 int const width2 =
 190                                         text_.singleWidth(par_, i, c, text_.getFont(par_, i));
 191                                 // dalet / resh
 192                                 dx = (c == 'ø' || c == 'ã')
 193                                         ? width2 - width
 194                                         : (width2 - width) / 2;
 195                         }
 196                         break;
 197                 }
 198         }
 199
 200         // Draw nikud
 201         pain_.text(int(x_) + dx, yo_, str, font);
 202 }
 203
 204
 205 void RowPainter::paintArabicComposeChar(pos_type & vpos, LyXFont const & font)
 206 {
 207         pos_type pos = text_.bidi.vis2log(vpos);
 208         string str;
 209
 210         // first char
 211         char c = par_.getChar(pos);
 212         c = par_.transformChar(c, pos);
 213         str += c;
 214         ++vpos;
 215
 216         int const width = font_metrics::width(c, font);
 217         int dx = 0;
 218
 219         for (pos_type i = pos - 1; i >= 0; --i) {
 220                 c = par_.getChar(i);
 221                 if (!Encodings::IsComposeChar_arabic(c)) {
 222                         if (IsPrintableNonspace(c)) {
 223                                 int const width2 =
 224                                         text_.singleWidth(par_, i, c, text_.getFont(par_, i));
 225                                 dx = (width2 - width) / 2;
 226                         }
 227                         break;
 228                 }
 229         }
 230         // Draw nikud
 231         pain_.text(int(x_) + dx, yo_, str, font);
 232 }
 233
 234
 235 void RowPainter::paintChars(pos_type & vpos, LyXFont font,
 236                             bool hebrew, bool arabic)
 237 {
 238         pos_type pos = text_.bidi.vis2log(vpos);
 239         pos_type const end = row_.endpos();
 240         FontSpan const font_span = par_.fontSpan(pos);
 241         Change::Type const prev_change = par_.lookupChange(pos);
 242
 243         // first character
 244         string str;
 245         str += par_.getChar(pos);
 246         if (arabic) {
 247                 unsigned char c = str[0];
 248                 str[0] = par_.transformChar(c, pos);
 249         }
 250
 251         // collect as much similar chars as we can
 252         for (++vpos ; vpos < end ; ++vpos) {
 253                 pos = text_.bidi.vis2log(vpos);
 254                 if (pos < font_span.first || pos > font_span.last)
 255                         break;
 256
 257                 if (prev_change != par_.lookupChange(pos))
 258                         break;
 259
 260                 char c = par_.getChar(pos);
 261
 262                 if (!IsPrintableNonspace(c))
 263                         break;
 264
 265                 if (arabic && Encodings::IsComposeChar_arabic(c))
 266                         break;
 267
 268                 if (hebrew && Encodings::IsComposeChar_hebrew(c))
 269                         break;
 270
 271                 if (arabic)
 272                         c = par_.transformChar(c, pos);
 273
 274                 str += c;
 275         }
 276
 277         if (prev_change == Change::DELETED)
 278                 font.setColor(LColor::strikeout);
 279         else if (prev_change == Change::INSERTED)
 280                 font.setColor(LColor::newtext);
 281
 282         // Draw text and set the new x position
 283         //lyxerr << "paint row: yo_ " << yo_ << "\n";
 284         pain_.text(int(x_), yo_, str, font);
 285         x_ += font_metrics::width(str, font);
 286 }
 287
 288
 289 void RowPainter::paintForeignMark(double orig_x, LyXFont const & font)
 290 {
 291         if (!lyxrc.mark_foreign_language)
 292                 return;
 293         if (font.language() == latex_language)
 294                 return;
 295         if (font.language() == bv_.buffer()->params().language)
 296                 return;
 297
 298         int const y = yo_ + 1;
 299         pain_.line(int(orig_x), y, int(x_), y, LColor::language);
 300 }
 301
 302
 303 void RowPainter::paintFromPos(pos_type & vpos)
 304 {
 305         pos_type const pos = text_.bidi.vis2log(vpos);
 306         LyXFont orig_font = text_.getFont(par_, pos);
 307         text_.applyOuterFont(orig_font);
 308
 309         double const orig_x = x_;
 310
 311         if (par_.isInset(pos)) {
 312                 paintInset(pos, orig_font);
 313                 ++vpos;
 314                 paintForeignMark(orig_x, orig_font);
 315                 return;
 316         }
 317
 318         // usual characters, no insets
 319         char const c = par_.getChar(pos);
 320
 321         // special case languages
 322         std::string const & lang = orig_font.language()->lang();
 323         bool const hebrew = lang == "hebrew";
 324         bool const arabic = lang == "arabic" &&
 325                 (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 326                 lyxrc.font_norm_type == LyXRC::ISO_10646_1);
 327
 328         // draw as many chars as we can
 329         if ((!hebrew && !arabic)
 330                 || (hebrew && !Encodings::IsComposeChar_hebrew(c))
 331                 || (arabic && !Encodings::IsComposeChar_arabic(c))) {
 332                 paintChars(vpos, orig_font, hebrew, arabic);
 333         } else if (hebrew) {
 334                 paintHebrewComposeChar(vpos, orig_font);
 335         } else if (arabic) {
 336                 paintArabicComposeChar(vpos, orig_font);
 337         }
 338
 339         paintForeignMark(orig_x, orig_font);
 340 }
 341
 342
 343 void RowPainter::paintChangeBar()
 344 {
 345         pos_type const start = row_.pos();
 346         pos_type const end = row_.endpos();
 347
 348         if (start == end || !par_.isChanged(start, end - 1))
 349                 return;
 350
 351         int const height = text_.isLastRow(pit_, row_)
 352                 ? row_.ascent()
 353                 : row_.height();
 354
 355         pain_.fillRectangle(4, yo_ - row_.ascent(), 5, height, LColor::changebar);
 356 }
 357
 358
 359 void RowPainter::paintAppendix()
 360 {
 361         if (!par_.params().appendix())
 362                 return;
 363
 364         int y = yo_ - row_.ascent();
 365
 366         if (par_.params().startOfAppendix())
 367                 y += 2 * defaultRowHeight();
 368
 369         pain_.line(1, y, 1, yo_ + row_.height(), LColor::appendix);
 370         pain_.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), LColor::appendix);
 371 }
 372
 373
 374 void RowPainter::paintDepthBar()
 375 {
 376         Paragraph::depth_type const depth = par_.getDepth();
 377
 378         if (depth <= 0)
 379                 return;
 380
 381         Paragraph::depth_type prev_depth = 0;
 382         if (!text_.isFirstRow(pit_, row_)) {
 383                 pit_type pit2 = pit_;
 384                 if (row_.pos() == 0)
 385                         --pit2;
 386                 prev_depth = pars_[pit2].getDepth();
 387         }
 388
 389         Paragraph::depth_type next_depth = 0;
 390         if (!text_.isLastRow(pit_, row_)) {
 391                 pit_type pit2 = pit_;
 392                 if (row_.endpos() >= pars_[pit2].size())
 393                         ++pit2;
 394                 next_depth = pars_[pit2].getDepth();
 395         }
 396
 397         for (Paragraph::depth_type i = 1; i <= depth; ++i) {
 398                 int const w = nestMargin() / 5;
 399                 int x = int(xo_) + w * i;
 400                 // only consider the changebar space if we're drawing outermost text
 401                 if (text_.isMainText())
 402                         x += changebarMargin();
 403
 404                 int const starty = yo_ - row_.ascent();
 405                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 406
 407                 pain_.line(x, starty, x, starty + h, LColor::depthbar);
 408
 409                 if (i > prev_depth)
 410                         pain_.fillRectangle(x, starty, w, 2, LColor::depthbar);
 411                 if (i > next_depth)
 412                         pain_.fillRectangle(x, starty + h, w, 2, LColor::depthbar);
 413         }
 414 }
 415
 416
 417 int RowPainter::paintAppendixStart(int y)
 418 {
 419         LyXFont pb_font;
 420         pb_font.setColor(LColor::appendix);
 421         pb_font.decSize();
 422
 423         string const label = _("Appendix");
 424         int w = 0;
 425         int a = 0;
 426         int d = 0;
 427         font_metrics::rectText(label, pb_font, w, a, d);
 428
 429         int const text_start = int(xo_ + (width_ - w) / 2);
 430         int const text_end = text_start + w;
 431
 432         pain_.rectText(text_start, y + d, label, pb_font, LColor::none, LColor::none);
 433
 434         pain_.line(int(xo_ + 1), y, text_start, y, LColor::appendix);
 435         pain_.line(text_end, y, int(xo_ + width_ - 2), y, LColor::appendix);
 436
 437         return 3 * defaultRowHeight();
 438 }
 439
 440
 441 void RowPainter::paintFirst()
 442 {
 443         ParagraphParameters const & parparams = par_.params();
 444
 445         int y_top = 0;
 446
 447         // start of appendix?
 448         if (parparams.startOfAppendix())
 449                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 450
 451         Buffer const & buffer = *bv_.buffer();
 452
 453         LyXLayout_ptr const & layout = par_.layout();
 454
 455         if (buffer.params().paragraph_separation == BufferParams::PARSEP_SKIP) {
 456                 if (pit_ != 0) {
 457                         if (layout->latextype == LATEX_PARAGRAPH
 458                                 && !par_.getDepth()) {
 459                                 y_top += buffer.params().getDefSkip().inPixels(bv_);
 460                         } else {
 461                                 LyXLayout_ptr const & playout = pars_[pit_ - 1].layout();
 462                                 if (playout->latextype == LATEX_PARAGRAPH
 463                                         && !pars_[pit_ - 1].getDepth()) {
 464                                         // is it right to use defskip here, too? (AS)
 465                                         y_top += buffer.params().getDefSkip().inPixels(bv_);
 466                                 }
 467                         }
 468                 }
 469         }
 470
 471         bool const is_rtl = text_.isRTL(par_);
 472         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 473         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << std::endl;
 474
 475         // should we print a label?
 476         if (layout->labeltype >= LABEL_STATIC
 477             && (layout->labeltype != LABEL_STATIC
 478                       || layout->latextype != LATEX_ENVIRONMENT
 479                       || is_seq)) {
 480
 481                 LyXFont const font = getLabelFont();
 482                 string const str = par_.getLabelstring();
 483                 if (!str.empty()) {
 484                         double x = x_;
 485
 486                         // this is special code for the chapter layout. This is
 487                         // printed in an extra row and has a pagebreak at
 488                         // the top.
 489                         if (layout->counter == "chapter") {
 490                                 double spacing_val = 1.0;
 491                                 if (!parparams.spacing().isDefault()) {
 492                                         spacing_val = parparams.spacing().getValue();
 493                                 } else {
 494                                         spacing_val = buffer.params().spacing().getValue();
 495                                 }
 496
 497                                 int const labeladdon = int(font_metrics::maxHeight(font) * layout->spacing.getValue() * spacing_val);
 498
 499                                 int const maxdesc = int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val)
 500                                         + int(layout->parsep) * defaultRowHeight();
 501
 502                                 if (is_rtl) {
 503                                         x = width_ - leftMargin() -
 504                                                 font_metrics::width(str, font);
 505                                 }
 506
 507                                 pain_.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 508                         } else {
 509                                 if (is_rtl) {
 510                                         x = width_ - leftMargin()
 511                                                 + font_metrics::width(layout->labelsep, font);
 512                                 } else {
 513                                         x = x_ - font_metrics::width(layout->labelsep, font)
 514                                                 - font_metrics::width(str, font);
 515                                 }
 516
 517                                 pain_.text(int(x), yo_, str, font);
 518                         }
 519                 }
 520
 521         // the labels at the top of an environment.
 522         // More or less for bibliography
 523         } else if (is_seq &&
 524                 (layout->labeltype == LABEL_TOP_ENVIRONMENT ||
 525                 layout->labeltype == LABEL_BIBLIO ||
 526                 layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 527                 LyXFont font = getLabelFont();
 528                 if (!par_.getLabelstring().empty()) {
 529                         string const str = par_.getLabelstring();
 530                         double spacing_val = 1.0;
 531                         if (!parparams.spacing().isDefault())
 532                                 spacing_val = parparams.spacing().getValue();
 533                         else
 534                                 spacing_val = buffer.params().spacing().getValue();
 535
 536                         int const labeladdon = int(font_metrics::maxHeight(font) * layout->spacing.getValue() * spacing_val);
 537
 538                         int maxdesc =
 539                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val
 540                                 + (layout->labelbottomsep * defaultRowHeight()));
 541
 542                         double x = x_;
 543                         if (layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 544                                 if (is_rtl)
 545                                         x = leftMargin();
 546                                 x += (width_ - text_.rightMargin(par_) - leftMargin()) / 2;
 547                                 x -= font_metrics::width(str, font) / 2;
 548                         } else if (is_rtl) {
 549                                 x = width_ - leftMargin() -
 550                                         font_metrics::width(str, font);
 551                         }
 552                         pain_.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 553                 }
 554         }
 555 }
 556
 557
 558 void RowPainter::paintLast()
 559 {
 560         bool const is_rtl = text_.isRTL(par_);
 561         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 562
 563         // draw an endlabel
 564         switch (endlabel) {
 565         case END_LABEL_BOX:
 566         case END_LABEL_FILLED_BOX: {
 567                 LyXFont const font = getLabelFont();
 568                 int const size = int(0.75 * font_metrics::maxAscent(font));
 569                 int const y = yo_ - size;
 570                 int x = is_rtl ? nestMargin() + changebarMargin() : width_ - size;
 571
 572                 if (width_ - int(row_.width()) <= size)
 573                         x += (size - width_ + row_.width() + 1) * (is_rtl ? -1 : 1);
 574
 575                 if (endlabel == END_LABEL_BOX)
 576                         pain_.rectangle(x, y, size, size, LColor::eolmarker);
 577                 else
 578                         pain_.fillRectangle(x, y, size, size, LColor::eolmarker);
 579                 break;
 580         }
 581
 582         case END_LABEL_STATIC: {
 583                 LyXFont font = getLabelFont();
 584                 string const & str = par_.layout()->endlabelstring();
 585                 double const x = is_rtl ?
 586                         x_ - font_metrics::width(str, font)
 587                         : - text_.rightMargin(par_) - row_.width();
 588                 pain_.text(int(x), yo_, str, font);
 589                 break;
 590         }
 591
 592         case END_LABEL_NO_LABEL:
 593                 break;
 594         }
 595 }
 596
 597
 598 void RowPainter::paintText()
 599 {
 600         pos_type const end = row_.endpos();
 601         pos_type body_pos = par_.beginOfBody();
 602         if (body_pos > 0 &&
 603                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 604                 body_pos = 0;
 605         }
 606
 607         LyXLayout_ptr const & layout = par_.layout();
 608
 609         bool running_strikeout = false;
 610         bool is_struckout = false;
 611         int last_strikeout_x = 0;
 612
 613         // Use font span to speed things up, see below
 614         FontSpan font_span;
 615         LyXFont font;
 616
 617         for (pos_type vpos = row_.pos(); vpos < end; ) {
 618                 if (x_ > bv_.workWidth())
 619                         break;
 620
 621                 pos_type const pos = text_.bidi.vis2log(vpos);
 622
 623                 if (pos >= par_.size()) {
 624                         ++vpos;
 625                         continue;
 626                 }
 627
 628                 // Use font span to speed things up, see above
 629                 if (vpos < font_span.first || vpos > font_span.last) {
 630                         font_span = par_.fontSpan(vpos);
 631                         font = text_.getFont(par_, vpos);
 632                 }
 633
 634                 const int width_pos =
 635                         text_.singleWidth(par_, pos, par_.getChar(pos), font);
 636
 637                 if (x_ + width_pos < 0) {
 638                         x_ += width_pos;
 639                         ++vpos;
 640                         continue;
 641                 }
 642
 643                 is_struckout = isDeletedText(par_, pos);
 644
 645                 if (is_struckout && !running_strikeout) {
 646                         running_strikeout = true;
 647                         last_strikeout_x = int(x_);
 648                 }
 649
 650                 bool const highly_editable_inset = par_.isInset(pos)
 651                         && isHighlyEditableInset(par_.getInset(pos));
 652
 653                 // If we reach the end of a struck out range, paint it.
 654                 // We also don't paint across things like tables
 655                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 656                         // Calculate 1/3 height of the buffer's default font
 657                         int const middle =
 658                                 yo_ - font_metrics::maxAscent(text_.defaultfont_) / 3;
 659                         pain_.line(last_strikeout_x, middle, int(x_), middle,
 660                                 LColor::strikeout, Painter::line_solid, Painter::line_thin);
 661                         running_strikeout = false;
 662                 }
 663
 664                 if (body_pos > 0 && pos == body_pos - 1) {
 665                         int const lwidth = font_metrics::width(layout->labelsep,
 666                                 getLabelFont());
 667
 668                         x_ += label_hfill_ + lwidth - width_pos;
 669                 }
 670
 671                 if (par_.isHfill(pos)) {
 672                         x_ += 1;
 673
 674                         int const y0 = yo_;
 675                         int const y1 = y0 - defaultRowHeight() / 2;
 676
 677                         pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 678
 679                         if (hfillExpansion(par_, row_, pos)) {
 680                                 int const y2 = (y0 + y1) / 2;
 681
 682                                 if (pos >= body_pos) {
 683                                         pain_.line(int(x_), y2, int(x_ + hfill_), y2,
 684                                                   LColor::added_space,
 685                                                   Painter::line_onoffdash);
 686                                         x_ += hfill_;
 687                                 } else {
 688                                         pain_.line(int(x_), y2, int(x_ + label_hfill_), y2,
 689                                                   LColor::added_space,
 690                                                   Painter::line_onoffdash);
 691                                         x_ += label_hfill_;
 692                                 }
 693                                 pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 694                         }
 695                         x_ += 2;
 696                         ++vpos;
 697                 } else if (par_.isSeparator(pos)) {
 698                         x_ += width_pos;
 699                         if (pos >= body_pos)
 700                                 x_ += separator_;
 701                         ++vpos;
 702                 } else {
 703                         paintFromPos(vpos);
 704                 }
 705         }
 706
 707         // if we reach the end of a struck out range, paint it
 708         if (running_strikeout) {
 709                 // calculate 1/3 height of the buffer's default font
 710                 int const middle =
 711                         yo_ - font_metrics::maxAscent(text_.defaultfont_) / 3;
 712                 pain_.line(last_strikeout_x, middle, int(x_), middle,
 713                         LColor::strikeout, Painter::line_solid, Painter::line_thin);
 714                 running_strikeout = false;
 715         }
 716 }
 717
 718
 719 void paintPar
 720         (PainterInfo & pi, LyXText const & text, pit_type pit, int x, int y)
 721 {
 722 //      lyxerr << "  paintPar: pit: " << pit << " at y: " << y << endl;
 723         static NullPainter nop;
 724         static PainterInfo nullpi(pi.base.bv, nop);
 725         int const ww = pi.base.bv->workHeight();
 726
 727         Paragraph const & par = text.paragraphs()[pit];
 728
 729         RowList::const_iterator const rb = par.rows().begin();
 730         RowList::const_iterator const re = par.rows().end();
 731         theCoords.parPos()[&text][pit] = Point(x, y);
 732
 733         y -= rb->ascent();
 734         for (RowList::const_iterator rit = rb; rit != re; ++rit) {
 735                 y += rit->ascent();
 736                 bool const inside = (y + rit->descent() >= 0
 737                                        && y - rit->ascent() < ww);
 738                 RowPainter rp(inside ? pi : nullpi, text, pit, *rit, x, y);
 739
 740                 y += rit->descent();
 741                 rp.paintAppendix();
 742                 rp.paintDepthBar();
 743                 rp.paintChangeBar();
 744                 if (rit == rb)
 745                         rp.paintFirst();
 746                 if (rit + 1 == re)
 747                         rp.paintLast();
 748                 rp.paintText();
 749         }
 750 }
 751
 752 } // namespace anon
 753
 754
 755 void paintText(BufferView const & bv, ViewMetricsInfo const & vi)
 756 {
 757         Painter & pain = bv.painter();
 758         LyXText * const text = bv.text();
 759
 760         // clear background
 761         pain.fillRectangle(0, vi.y1, bv.workWidth(), vi.y2 - vi.y1,
 762                            LColor::background);
 763
 764         // draw selection
 765         PainterInfo pi(const_cast<BufferView *>(&bv), pain);
 766
 767         text->drawSelection(pi, 0, 0);
 768
 769         int yy = vi.y1;
 770         // draw contents
 771         for (pit_type pit = vi.p1; pit <= vi.p2; ++pit) {
 772                 yy += text->getPar(pit).ascent();
 773                 paintPar(pi, *bv.text(), pit, 0, yy);
 774                 yy += text->getPar(pit).descent();
 775         }
 776
 777         // Cache one paragraph above and one below
 778         // Note MV: this cannot be suppressed even for singlepar.
 779         // Try viewing the User Guide Mobius figure
 780
 781         if (vi.p1 > 0) {
 782                 text->redoParagraph(vi.p1 - 1);
 783                 theCoords.parPos()[bv.text()][vi.p1 - 1] =
 784                         Point(0, vi.y1 - text->getPar(vi.p1 - 1).descent());
 785         }
 786
 787         if (vi.p2 < lyx::pit_type(text->paragraphs().size()) - 1) {
 788                 text->redoParagraph(vi.p2 + 1);
 789                 theCoords.parPos()[bv.text()][vi.p2 + 1] =
 790                         Point(0, vi.y2 + text->getPar(vi.p2 + 1).ascent());
 791         }
 792
 793         // and grey out above (should not happen later)
 794 //      lyxerr << "par ascent: " << text->getPar(vi.p1).ascent() << endl;
 795         if (vi.y1 > 0 && !vi.singlepar)
 796                 pain.fillRectangle(0, 0, bv.workWidth(), vi.y1, LColor::bottomarea);
 797
 798         // and possibly grey out below
 799 //      lyxerr << "par descent: " << text->getPar(vi.p1).ascent() << endl;
 800         if (vi.y2 < bv.workHeight() && !vi.singlepar)
 801                 pain.fillRectangle(0, vi.y2, bv.workWidth(), bv.workHeight() - vi.y2, LColor::bottomarea);
 802 }
 803
 804
 805 void paintTextInset(LyXText const & text, PainterInfo & pi, int x, int y)
 806 {
 807 //      lyxerr << "  paintTextInset: y: " << y << endl;
 808
 809         y -= text.getPar(0).ascent();
 810         for (int pit = 0; pit < int(text.paragraphs().size()); ++pit) {
 811                 y += text.getPar(pit).ascent();
 812                 paintPar(pi, text, pit, x, y);
 813                 y += text.getPar(pit).descent();
 814         }
 815 }