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 font at the given pos
  85         LyXFont const getFont(lyx::pos_type pos) const;
  86
  87         /// return the label font for this row
  88         LyXFont const getLabelFont() const;
  89
  90         /// return pixel width for the given pos
  91         int singleWidth(lyx::pos_type pos) const;
  92         int singleWidth(lyx::pos_type pos, char c) const;
  93
  94         /// bufferview to paint on
  95         BufferView const & bv_;
  96
  97         /// Painter to use
  98         Painter & pain_;
  99
 100         /// LyXText for the row
 101         LyXText const & text_;
 102         ParagraphList const & pars_;
 103
 104         /// The row to paint
 105         Row const & row_;
 106
 107         /// Row's paragraph
 108         pit_type const pit_;
 109         Paragraph const & par_;
 110
 111         // Looks ugly - is
 112         double const xo_;
 113         int const yo_;    // current baseline
 114         double x_;
 115         int width_;
 116         double separator_;
 117         double hfill_;
 118         double label_hfill_;
 119 };
 120
 121
 122 RowPainter::RowPainter(PainterInfo & pi,
 123         LyXText const & text, pit_type pit, Row const & row, int x, int y)
 124         : bv_(*pi.base.bv), pain_(pi.pain), text_(text), pars_(text.paragraphs()),
 125           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
 126           xo_(x), yo_(y), width_(text_.width())
 127 {
 128         RowMetrics m = text_.computeRowMetrics(pit, row_);
 129         x_ = m.x + xo_;
 130
 131         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
 132         //row_.dump();
 133
 134         separator_ = m.separator;
 135         hfill_ = m.hfill;
 136         label_hfill_ = m.label_hfill;
 137
 138         BOOST_ASSERT(pit >= 0);
 139         BOOST_ASSERT(pit < int(text.paragraphs().size()));
 140 }
 141
 142
 143 /// "temporary"
 144 LyXFont const RowPainter::getFont(pos_type pos) const
 145 {
 146         LyXFont pf(text_.getFont(par_, pos));
 147         text_.applyOuterFont(pf);
 148         return pf;
 149 }
 150
 151
 152 int RowPainter::singleWidth(lyx::pos_type pos) const
 153 {
 154         return text_.singleWidth(par_, pos);
 155 }
 156
 157
 158 int RowPainter::singleWidth(lyx::pos_type pos, char c) const
 159 {
 160         LyXFont const & font = text_.getFont(par_, pos);
 161         return text_.singleWidth(par_, pos, c, font);
 162 }
 163
 164
 165 LyXFont const RowPainter::getLabelFont() const
 166 {
 167         return text_.getLabelFont(par_);
 168 }
 169
 170
 171 int RowPainter::leftMargin() const
 172 {
 173         return text_.leftMargin(pit_, row_.pos());
 174 }
 175
 176
 177 void RowPainter::paintInset(pos_type const pos, LyXFont const & font)
 178 {
 179         InsetBase const * inset = par_.getInset(pos);
 180         BOOST_ASSERT(inset);
 181         PainterInfo pi(const_cast<BufferView *>(&bv_), pain_);
 182         pi.base.font = font;
 183         pi.ltr_pos = (text_.bidi.level(pos) % 2 == 0);
 184         theCoords.insets().add(inset, int(x_), yo_);
 185         inset->drawSelection(pi, int(x_), yo_);
 186         inset->draw(pi, int(x_), yo_);
 187         x_ += inset->width();
 188 }
 189
 190
 191 void RowPainter::paintHebrewComposeChar(pos_type & vpos, LyXFont const & font)
 192 {
 193         pos_type pos = text_.bidi.vis2log(vpos);
 194
 195         string str;
 196
 197         // first char
 198         char c = par_.getChar(pos);
 199         str += c;
 200         ++vpos;
 201
 202         int const width = font_metrics::width(c, font);
 203         int dx = 0;
 204
 205         for (pos_type i = pos - 1; i >= 0; --i) {
 206                 c = par_.getChar(i);
 207                 if (!Encodings::IsComposeChar_hebrew(c)) {
 208                         if (IsPrintableNonspace(c)) {
 209                                 int const width2 = singleWidth(i, c);
 210                                 // dalet / resh
 211                                 dx = (c == 'ø' || c == 'ã')
 212                                         ? width2 - width
 213                                         : (width2 - width) / 2;
 214                         }
 215                         break;
 216                 }
 217         }
 218
 219         // Draw nikud
 220         pain_.text(int(x_) + dx, yo_, str, font);
 221 }
 222
 223
 224 void RowPainter::paintArabicComposeChar(pos_type & vpos, LyXFont const & font)
 225 {
 226         pos_type pos = text_.bidi.vis2log(vpos);
 227         string str;
 228
 229         // first char
 230         char c = par_.getChar(pos);
 231         c = par_.transformChar(c, pos);
 232         str += c;
 233         ++vpos;
 234
 235         int const width = font_metrics::width(c, font);
 236         int dx = 0;
 237
 238         for (pos_type i = pos - 1; i >= 0; --i) {
 239                 c = par_.getChar(i);
 240                 if (!Encodings::IsComposeChar_arabic(c)) {
 241                         if (IsPrintableNonspace(c)) {
 242                                 int const width2 = singleWidth(i, c);
 243                                 dx = (width2 - width) / 2;
 244                         }
 245                         break;
 246                 }
 247         }
 248         // Draw nikud
 249         pain_.text(int(x_) + dx, yo_, str, font);
 250 }
 251
 252
 253 void RowPainter::paintChars(pos_type & vpos, LyXFont font,
 254                             bool hebrew, bool arabic)
 255 {
 256         pos_type pos = text_.bidi.vis2log(vpos);
 257         pos_type const end = row_.endpos();
 258         FontSpan const font_span = par_.fontSpan(pos);
 259         Change::Type const prev_change = par_.lookupChange(pos);
 260
 261         // first character
 262         string str;
 263         str += par_.getChar(pos);
 264         if (arabic) {
 265                 unsigned char c = str[0];
 266                 str[0] = par_.transformChar(c, pos);
 267         }
 268
 269         // collect as much similar chars as we can
 270         for (++vpos ; vpos < end ; ++vpos) {
 271                 pos = text_.bidi.vis2log(vpos);
 272                 if (pos < font_span.first || pos > font_span.last)
 273                         break;
 274
 275                 if (prev_change != par_.lookupChange(pos))
 276                         break;
 277
 278                 char c = par_.getChar(pos);
 279
 280                 if (!IsPrintableNonspace(c))
 281                         break;
 282
 283                 if (arabic && Encodings::IsComposeChar_arabic(c))
 284                         break;
 285
 286                 if (hebrew && Encodings::IsComposeChar_hebrew(c))
 287                         break;
 288
 289                 if (arabic)
 290                         c = par_.transformChar(c, pos);
 291
 292                 str += c;
 293         }
 294
 295         if (prev_change == Change::DELETED)
 296                 font.setColor(LColor::strikeout);
 297         else if (prev_change == Change::INSERTED)
 298                 font.setColor(LColor::newtext);
 299
 300         // Draw text and set the new x position
 301         //lyxerr << "paint row: yo_ " << yo_ << "\n";
 302         pain_.text(int(x_), yo_, str, font);
 303         x_ += font_metrics::width(str, font);
 304 }
 305
 306
 307 void RowPainter::paintForeignMark(double orig_x, LyXFont const & font)
 308 {
 309         if (!lyxrc.mark_foreign_language)
 310                 return;
 311         if (font.language() == latex_language)
 312                 return;
 313         if (font.language() == bv_.buffer()->params().language)
 314                 return;
 315
 316         int const y = yo_ + 1;
 317         pain_.line(int(orig_x), y, int(x_), y, LColor::language);
 318 }
 319
 320
 321 void RowPainter::paintFromPos(pos_type & vpos)
 322 {
 323         pos_type const pos = text_.bidi.vis2log(vpos);
 324
 325         LyXFont const & orig_font = getFont(pos);
 326
 327         double const orig_x = x_;
 328
 329         char const c = par_.getChar(pos);
 330
 331         if (c == Paragraph::META_INSET) {
 332                 paintInset(pos, orig_font);
 333                 ++vpos;
 334                 paintForeignMark(orig_x, orig_font);
 335                 return;
 336         }
 337
 338         // usual characters, no insets
 339
 340         // special case languages
 341         bool const hebrew = (orig_font.language()->lang() == "hebrew");
 342         bool const arabic =
 343                 orig_font.language()->lang() == "arabic" &&
 344                 (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 345                 lyxrc.font_norm_type == LyXRC::ISO_10646_1);
 346
 347         // draw as many chars as we can
 348         if ((!hebrew && !arabic)
 349                 || (hebrew && !Encodings::IsComposeChar_hebrew(c))
 350                 || (arabic && !Encodings::IsComposeChar_arabic(c))) {
 351                 paintChars(vpos, orig_font, hebrew, arabic);
 352         } else if (hebrew) {
 353                 paintHebrewComposeChar(vpos, orig_font);
 354         } else if (arabic) {
 355                 paintArabicComposeChar(vpos, orig_font);
 356         }
 357
 358         paintForeignMark(orig_x, orig_font);
 359 }
 360
 361
 362 void RowPainter::paintChangeBar()
 363 {
 364         pos_type const start = row_.pos();
 365         pos_type const end = row_.endpos();
 366
 367         if (start == end || !par_.isChanged(start, end - 1))
 368                 return;
 369
 370         int const height = text_.isLastRow(pit_, row_)
 371                 ? row_.ascent()
 372                 : row_.height();
 373
 374         pain_.fillRectangle(4, yo_ - row_.ascent(), 5, height, LColor::changebar);
 375 }
 376
 377
 378 void RowPainter::paintAppendix()
 379 {
 380         if (!par_.params().appendix())
 381                 return;
 382
 383         int y = yo_ - row_.ascent();
 384
 385         if (par_.params().startOfAppendix())
 386                 y += 2 * defaultRowHeight();
 387
 388         pain_.line(1, y, 1, yo_ + row_.height(), LColor::appendix);
 389         pain_.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), LColor::appendix);
 390 }
 391
 392
 393 void RowPainter::paintDepthBar()
 394 {
 395         Paragraph::depth_type const depth = par_.getDepth();
 396
 397         if (depth <= 0)
 398                 return;
 399
 400         Paragraph::depth_type prev_depth = 0;
 401         if (!text_.isFirstRow(pit_, row_)) {
 402                 pit_type pit2 = pit_;
 403                 if (row_.pos() == 0)
 404                         --pit2;
 405                 prev_depth = pars_[pit2].getDepth();
 406         }
 407
 408         Paragraph::depth_type next_depth = 0;
 409         if (!text_.isLastRow(pit_, row_)) {
 410                 pit_type pit2 = pit_;
 411                 if (row_.endpos() >= pars_[pit2].size())
 412                         ++pit2;
 413                 next_depth = pars_[pit2].getDepth();
 414         }
 415
 416         for (Paragraph::depth_type i = 1; i <= depth; ++i) {
 417                 int const w = nestMargin() / 5;
 418                 int x = int(xo_) + w * i;
 419                 // only consider the changebar space if we're drawing outermost text
 420                 if (text_.isMainText())
 421                         x += changebarMargin();
 422
 423                 int const starty = yo_ - row_.ascent();
 424                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 425
 426                 pain_.line(x, starty, x, starty + h, LColor::depthbar);
 427
 428                 if (i > prev_depth)
 429                         pain_.fillRectangle(x, starty, w, 2, LColor::depthbar);
 430                 if (i > next_depth)
 431                         pain_.fillRectangle(x, starty + h, w, 2, LColor::depthbar);
 432         }
 433 }
 434
 435
 436 int RowPainter::paintAppendixStart(int y)
 437 {
 438         LyXFont pb_font;
 439         pb_font.setColor(LColor::appendix);
 440         pb_font.decSize();
 441
 442         string const label = _("Appendix");
 443         int w = 0;
 444         int a = 0;
 445         int d = 0;
 446         font_metrics::rectText(label, pb_font, w, a, d);
 447
 448         int const text_start = int(xo_ + (width_ - w) / 2);
 449         int const text_end = text_start + w;
 450
 451         pain_.rectText(text_start, y + d, label, pb_font, LColor::none, LColor::none);
 452
 453         pain_.line(int(xo_ + 1), y, text_start, y, LColor::appendix);
 454         pain_.line(text_end, y, int(xo_ + width_ - 2), y, LColor::appendix);
 455
 456         return 3 * defaultRowHeight();
 457 }
 458
 459
 460 void RowPainter::paintFirst()
 461 {
 462         ParagraphParameters const & parparams = par_.params();
 463
 464         int y_top = 0;
 465
 466         // start of appendix?
 467         if (parparams.startOfAppendix())
 468                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 469
 470         Buffer const & buffer = *bv_.buffer();
 471
 472         LyXLayout_ptr const & layout = par_.layout();
 473
 474         if (buffer.params().paragraph_separation == BufferParams::PARSEP_SKIP) {
 475                 if (pit_ != 0) {
 476                         if (layout->latextype == LATEX_PARAGRAPH
 477                                 && !par_.getDepth()) {
 478                                 y_top += buffer.params().getDefSkip().inPixels(bv_);
 479                         } else {
 480                                 LyXLayout_ptr const & playout = pars_[pit_ - 1].layout();
 481                                 if (playout->latextype == LATEX_PARAGRAPH
 482                                         && !pars_[pit_ - 1].getDepth()) {
 483                                         // is it right to use defskip here, too? (AS)
 484                                         y_top += buffer.params().getDefSkip().inPixels(bv_);
 485                                 }
 486                         }
 487                 }
 488         }
 489
 490         bool const is_rtl = text_.isRTL(par_);
 491         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 492         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << std::endl;
 493
 494         // should we print a label?
 495         if (layout->labeltype >= LABEL_STATIC
 496             && (layout->labeltype != LABEL_STATIC
 497                       || layout->latextype != LATEX_ENVIRONMENT
 498                       || is_seq)) {
 499
 500                 LyXFont const font = getLabelFont();
 501                 string const str = par_.getLabelstring();
 502                 if (!str.empty()) {
 503                         double x = x_;
 504
 505                         // this is special code for the chapter layout. This is
 506                         // printed in an extra row and has a pagebreak at
 507                         // the top.
 508                         if (layout->counter == "chapter") {
 509                                 double spacing_val = 1.0;
 510                                 if (!parparams.spacing().isDefault()) {
 511                                         spacing_val = parparams.spacing().getValue();
 512                                 } else {
 513                                         spacing_val = buffer.params().spacing().getValue();
 514                                 }
 515 #ifdef WITH_WARNINGS
 516 #warning Look is this correct?
 517 #endif
 518                                 int const labeladdon = int(font_metrics::maxHeight(font) * layout->spacing.getValue() * spacing_val);
 519
 520                                 int const maxdesc = int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val)
 521                                         + int(layout->parsep) * defaultRowHeight();
 522
 523                                 if (is_rtl) {
 524                                         x = width_ - leftMargin() -
 525                                                 font_metrics::width(str, font);
 526                                 }
 527
 528                                 pain_.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 529                         } else {
 530                                 if (is_rtl) {
 531                                         x = width_ - leftMargin()
 532                                                 + font_metrics::width(layout->labelsep, font);
 533                                 } else {
 534                                         x = x_ - font_metrics::width(layout->labelsep, font)
 535                                                 - font_metrics::width(str, font);
 536                                 }
 537
 538                                 pain_.text(int(x), yo_, str, font);
 539                         }
 540                 }
 541
 542         // the labels at the top of an environment.
 543         // More or less for bibliography
 544         } else if (is_seq &&
 545                 (layout->labeltype == LABEL_TOP_ENVIRONMENT ||
 546                 layout->labeltype == LABEL_BIBLIO ||
 547                 layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 548                 LyXFont font = getLabelFont();
 549                 if (!par_.getLabelstring().empty()) {
 550                         string const str = par_.getLabelstring();
 551                         double spacing_val = 1.0;
 552                         if (!parparams.spacing().isDefault()) {
 553                                 spacing_val = parparams.spacing().getValue();
 554                         } else {
 555                                 spacing_val = buffer.params().spacing().getValue();
 556                         }
 557
 558                         int maxdesc =
 559                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val
 560                                 + (layout->labelbottomsep * defaultRowHeight()));
 561
 562                         double x = x_;
 563                         if (layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 564                                 x = ((is_rtl ? leftMargin() : x_)
 565                                          + width_ - text_.rightMargin(par_)) / 2;
 566                                 x -= font_metrics::width(str, font) / 2;
 567                         } else if (is_rtl) {
 568                                 x = width_ - leftMargin() -
 569                                         font_metrics::width(str, font);
 570                         }
 571                         pain_.text(int(x), yo_ - maxdesc, str, font);
 572                 }
 573         }
 574 }
 575
 576
 577 void RowPainter::paintLast()
 578 {
 579         bool const is_rtl = text_.isRTL(par_);
 580         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 581
 582         // draw an endlabel
 583         switch (endlabel) {
 584         case END_LABEL_BOX:
 585         case END_LABEL_FILLED_BOX: {
 586                 LyXFont const font = getLabelFont();
 587                 int const size = int(0.75 * font_metrics::maxAscent(font));
 588                 int const y = yo_ - size;
 589                 int x = is_rtl ? nestMargin() + changebarMargin() : width_ - size;
 590
 591                 if (width_ - int(row_.width()) <= size)
 592                         x += (size - width_ + row_.width() + 1) * (is_rtl ? -1 : 1);
 593
 594                 if (endlabel == END_LABEL_BOX)
 595                         pain_.rectangle(x, y, size, size, LColor::eolmarker);
 596                 else
 597                         pain_.fillRectangle(x, y, size, size, LColor::eolmarker);
 598                 break;
 599         }
 600
 601         case END_LABEL_STATIC: {
 602                 LyXFont font = getLabelFont();
 603                 string const & str = par_.layout()->endlabelstring();
 604                 double const x = is_rtl ?
 605                         x_ - font_metrics::width(str, font)
 606                         : - text_.rightMargin(par_) - row_.width();
 607                 pain_.text(int(x), yo_, str, font);
 608                 break;
 609         }
 610
 611         case END_LABEL_NO_LABEL:
 612                 break;
 613         }
 614 }
 615
 616
 617 void RowPainter::paintText()
 618 {
 619         pos_type const end = row_.endpos();
 620         pos_type body_pos = par_.beginOfBody();
 621         if (body_pos > 0 &&
 622                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 623                 body_pos = 0;
 624         }
 625
 626         LyXLayout_ptr const & layout = par_.layout();
 627
 628         bool running_strikeout = false;
 629         bool is_struckout = false;
 630         int last_strikeout_x = 0;
 631
 632         for (pos_type vpos = row_.pos(); vpos < end; ) {
 633                 if (x_ > bv_.workWidth())
 634                         break;
 635
 636                 pos_type const pos = text_.bidi.vis2log(vpos);
 637
 638                 if (pos >= par_.size()) {
 639                         ++vpos;
 640                         continue;
 641                 }
 642
 643                 const int width_pos = singleWidth(pos);
 644                 if (x_ + width_pos < 0) {
 645                         x_ += width_pos;
 646                         ++vpos;
 647                         continue;
 648                 }
 649
 650                 is_struckout = isDeletedText(par_, pos);
 651
 652                 if (is_struckout && !running_strikeout) {
 653                         running_strikeout = true;
 654                         last_strikeout_x = int(x_);
 655                 }
 656
 657                 bool const highly_editable_inset = par_.isInset(pos)
 658                         && isHighlyEditableInset(par_.getInset(pos));
 659
 660                 // if we reach the end of a struck out range, paint it
 661                 // we also don't paint across things like tables
 662                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 663                         // calculate 1/3 height of the buffer's default font
 664                         int const middle =
 665                                 yo_ - font_metrics::maxAscent(text_.defaultfont_) / 3;
 666                         pain_.line(last_strikeout_x, middle, int(x_), middle,
 667                                 LColor::strikeout, Painter::line_solid, Painter::line_thin);
 668                         running_strikeout = false;
 669                 }
 670
 671                 if (body_pos > 0 && pos == body_pos - 1) {
 672                         int const lwidth = font_metrics::width(layout->labelsep,
 673                                 getLabelFont());
 674
 675                         x_ += label_hfill_ + lwidth - width_pos;
 676                 }
 677
 678                 if (par_.isHfill(pos)) {
 679                         x_ += 1;
 680
 681                         int const y0 = yo_;
 682                         int const y1 = y0 - defaultRowHeight() / 2;
 683
 684                         pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 685
 686                         if (hfillExpansion(par_, row_, pos)) {
 687                                 int const y2 = (y0 + y1) / 2;
 688
 689                                 if (pos >= body_pos) {
 690                                         pain_.line(int(x_), y2, int(x_ + hfill_), y2,
 691                                                   LColor::added_space,
 692                                                   Painter::line_onoffdash);
 693                                         x_ += hfill_;
 694                                 } else {
 695                                         pain_.line(int(x_), y2, int(x_ + label_hfill_), y2,
 696                                                   LColor::added_space,
 697                                                   Painter::line_onoffdash);
 698                                         x_ += label_hfill_;
 699                                 }
 700                                 pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 701                         }
 702                         x_ += 2;
 703                         ++vpos;
 704                 } else if (par_.isSeparator(pos)) {
 705                         x_ += width_pos;
 706                         if (pos >= body_pos)
 707                                 x_ += separator_;
 708                         ++vpos;
 709                 } else {
 710                         paintFromPos(vpos);
 711                 }
 712         }
 713
 714         // if we reach the end of a struck out range, paint it
 715         if (running_strikeout) {
 716                 // calculate 1/3 height of the buffer's default font
 717                 int const middle =
 718                         yo_ - font_metrics::maxAscent(text_.defaultfont_) / 3;
 719                 pain_.line(last_strikeout_x, middle, int(x_), middle,
 720                         LColor::strikeout, Painter::line_solid, Painter::line_thin);
 721                 running_strikeout = false;
 722         }
 723 }
 724
 725
 726 void paintPar
 727         (PainterInfo & pi, LyXText const & text, pit_type pit, int x, int y)
 728 {
 729 //      lyxerr << "  paintPar: pit: " << pit << " at y: " << y << endl;
 730         static NullPainter nop;
 731         static PainterInfo nullpi(pi.base.bv, nop);
 732         int const ww = pi.base.bv->workHeight();
 733
 734         Paragraph const & par = text.paragraphs()[pit];
 735
 736         RowList::const_iterator const rb = par.rows().begin();
 737         RowList::const_iterator const re = par.rows().end();
 738         theCoords.parPos()[&text][pit] = Point(x, y);
 739
 740         y -= rb->ascent();
 741         for (RowList::const_iterator rit = rb; rit != re; ++rit) {
 742                 y += rit->ascent();
 743                 bool const inside = (y + rit->descent() >= 0
 744                                        && y - rit->ascent() < ww);
 745                 RowPainter rp(inside ? pi : nullpi, text, pit, *rit, x, y);
 746
 747                 y += rit->descent();
 748                 rp.paintAppendix();
 749                 rp.paintDepthBar();
 750                 rp.paintChangeBar();
 751                 if (rit == rb)
 752                         rp.paintFirst();
 753                 if (rit + 1 == re)
 754                         rp.paintLast();
 755                 rp.paintText();
 756         }
 757 }
 758
 759 } // namespace anon
 760
 761
 762 void paintText(BufferView const & bv, ViewMetricsInfo const & vi)
 763 {
 764         Painter & pain = bv.painter();
 765         LyXText * const text = bv.text();
 766
 767         // clear background
 768         pain.fillRectangle(0, vi.y1, bv.workWidth(), vi.y2 - vi.y1,
 769                            LColor::background);
 770
 771         // draw selection
 772         PainterInfo pi(const_cast<BufferView *>(&bv), pain);
 773
 774         text->drawSelection(pi, 0, 0);
 775
 776         int yy = vi.y1;
 777         // draw contents
 778         for (pit_type pit = vi.p1; pit <= vi.p2; ++pit) {
 779                 yy += text->getPar(pit).ascent();
 780                 paintPar(pi, *bv.text(), pit, 0, yy);
 781                 yy += text->getPar(pit).descent();
 782         }
 783
 784
 785         // paint one paragraph above and one below
 786         // Note MV: this cannot be suppressed even for singlepar.
 787         // Try viewing the User Guide Mobius figure
 788         if (vi.p1 > 0) {
 789                 text->redoParagraph(vi.p1 - 1);
 790                 paintPar(pi, *bv.text(), vi.p1 - 1, 0,
 791                          vi.y1 -  text->getPar(vi.p1 - 1).descent());
 792         }
 793
 794         if (vi.p2 < lyx::pit_type(text->paragraphs().size()) - 1) {
 795                 text->redoParagraph(vi.p2 + 1);
 796                 paintPar(pi, *bv.text(), vi.p2 + 1, 0,
 797                          vi.y2 + text->getPar(vi.p2 + 1).ascent());
 798         }
 799
 800         // and grey out above (should not happen later)
 801 //      lyxerr << "par ascent: " << text->getPar(vi.p1).ascent() << endl;
 802         if (vi.y1 > 0)
 803                 pain.fillRectangle(0, 0, bv.workWidth(), vi.y1, LColor::bottomarea);
 804
 805         // and possibly grey out below
 806 //      lyxerr << "par descent: " << text->getPar(vi.p1).ascent() << endl;
 807         if (vi.y2 < bv.workHeight())
 808                 pain.fillRectangle(0, vi.y2, bv.workWidth(), bv.workHeight() - vi.y2, LColor::bottomarea);
 809 }
 810
 811
 812 void paintTextInset(LyXText const & text, PainterInfo & pi, int x, int y)
 813 {
 814 //      lyxerr << "  paintTextInset: y: " << y << endl;
 815
 816         y -= text.getPar(0).ascent();
 817         for (int pit = 0; pit < int(text.paragraphs().size()); ++pit) {
 818                 y += text.getPar(pit).ascent();
 819                 paintPar(pi, text, pit, x, y);
 820                 y += text.getPar(pit).descent();
 821         }
 822 }