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