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