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 & 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         std::pair<lyx::pos_type, lyx::pos_type> const font_span
 259                 = par_.getFontSpan(pos);
 260         Change::Type const prev_change = par_.lookupChange(pos);
 261
 262         // first character
 263         string str;
 264         str += par_.getChar(pos);
 265         if (arabic) {
 266                 unsigned char c = str[0];
 267                 str[0] = par_.transformChar(c, pos);
 268         }
 269
 270         // collect as much similar chars as we can
 271         for (++vpos ; vpos < end ; ++vpos) {
 272                 pos = text_.bidi.vis2log(vpos);
 273                 if (pos < font_span.first || pos > font_span.second)
 274                         break;
 275
 276                 if (prev_change != par_.lookupChange(pos))
 277                         break;
 278
 279                 char c = par_.getChar(pos);
 280
 281                 if (!IsPrintableNonspace(c))
 282                         break;
 283
 284                 if (arabic && Encodings::IsComposeChar_arabic(c))
 285                         break;
 286
 287                 if (hebrew && Encodings::IsComposeChar_hebrew(c))
 288                         break;
 289
 290                 if (arabic)
 291                         c = par_.transformChar(c, pos);
 292
 293                 str += c;
 294         }
 295
 296         if (prev_change == Change::DELETED)
 297                 font.setColor(LColor::strikeout);
 298         else if (prev_change == Change::INSERTED)
 299                 font.setColor(LColor::newtext);
 300
 301         // Draw text and set the new x position
 302         //lyxerr << "paint row: yo_ " << yo_ << "\n";
 303         pain_.text(int(x_), yo_, str, font);
 304         x_ += font_metrics::width(str, font);
 305 }
 306
 307
 308 void RowPainter::paintForeignMark(double orig_x, LyXFont const & font)
 309 {
 310         if (!lyxrc.mark_foreign_language)
 311                 return;
 312         if (font.language() == latex_language)
 313                 return;
 314         if (font.language() == bv_.buffer()->params().language)
 315                 return;
 316
 317         int const y = yo_ + 1;
 318         pain_.line(int(orig_x), y, int(x_), y, LColor::language);
 319 }
 320
 321
 322 void RowPainter::paintFromPos(pos_type & vpos)
 323 {
 324         pos_type const pos = text_.bidi.vis2log(vpos);
 325
 326         LyXFont const & orig_font = getFont(pos);
 327
 328         double const orig_x = x_;
 329
 330         char const c = par_.getChar(pos);
 331
 332         if (c == Paragraph::META_INSET) {
 333                 paintInset(pos, orig_font);
 334                 ++vpos;
 335                 paintForeignMark(orig_x, orig_font);
 336                 return;
 337         }
 338
 339         // usual characters, no insets
 340
 341         // special case languages
 342         bool const hebrew = (orig_font.language()->lang() == "hebrew");
 343         bool const arabic =
 344                 orig_font.language()->lang() == "arabic" &&
 345                 (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 346                 lyxrc.font_norm_type == LyXRC::ISO_10646_1);
 347
 348         // draw as many chars as we can
 349         if ((!hebrew && !arabic)
 350                 || (hebrew && !Encodings::IsComposeChar_hebrew(c))
 351                 || (arabic && !Encodings::IsComposeChar_arabic(c))) {
 352                 paintChars(vpos, orig_font, hebrew, arabic);
 353         } else if (hebrew) {
 354                 paintHebrewComposeChar(vpos, orig_font);
 355         } else if (arabic) {
 356                 paintArabicComposeChar(vpos, orig_font);
 357         }
 358
 359         paintForeignMark(orig_x, orig_font);
 360 }
 361
 362
 363 void RowPainter::paintChangeBar()
 364 {
 365         pos_type const start = row_.pos();
 366         pos_type const end = row_.endpos();
 367
 368         if (start == end || !par_.isChanged(start, end - 1))
 369                 return;
 370
 371         int const height = text_.isLastRow(pit_, row_)
 372                 ? row_.ascent()
 373                 : row_.height();
 374
 375         pain_.fillRectangle(4, yo_ - row_.ascent(), 5, height, LColor::changebar);
 376 }
 377
 378
 379 void RowPainter::paintAppendix()
 380 {
 381         if (!par_.params().appendix())
 382                 return;
 383
 384         int y = yo_ - row_.ascent();
 385
 386         if (par_.params().startOfAppendix())
 387                 y += 2 * defaultRowHeight();
 388
 389         pain_.line(1, y, 1, yo_ + row_.height(), LColor::appendix);
 390         pain_.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), LColor::appendix);
 391 }
 392
 393
 394 void RowPainter::paintDepthBar()
 395 {
 396         Paragraph::depth_type const depth = par_.getDepth();
 397
 398         if (depth <= 0)
 399                 return;
 400
 401         Paragraph::depth_type prev_depth = 0;
 402         if (!text_.isFirstRow(pit_, row_)) {
 403                 pit_type pit2 = pit_;
 404                 if (row_.pos() == 0)
 405                         --pit2;
 406                 prev_depth = pars_[pit2].getDepth();
 407         }
 408
 409         Paragraph::depth_type next_depth = 0;
 410         if (!text_.isLastRow(pit_, row_)) {
 411                 pit_type pit2 = pit_;
 412                 if (row_.endpos() >= pars_[pit2].size())
 413                         ++pit2;
 414                 next_depth = pars_[pit2].getDepth();
 415         }
 416
 417         for (Paragraph::depth_type i = 1; i <= depth; ++i) {
 418                 int const w = nestMargin() / 5;
 419                 int x = int(xo_) + w * i;
 420                 // only consider the changebar space if we're drawing outermost text
 421                 if (text_.isMainText())
 422                         x += changebarMargin();
 423
 424                 int const starty = yo_ - row_.ascent();
 425                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 426
 427                 pain_.line(x, starty, x, starty + h, LColor::depthbar);
 428
 429                 if (i > prev_depth)
 430                         pain_.fillRectangle(x, starty, w, 2, LColor::depthbar);
 431                 if (i > next_depth)
 432                         pain_.fillRectangle(x, starty + h, w, 2, LColor::depthbar);
 433         }
 434 }
 435
 436
 437 int RowPainter::paintAppendixStart(int y)
 438 {
 439         LyXFont pb_font;
 440         pb_font.setColor(LColor::appendix);
 441         pb_font.decSize();
 442
 443         string const label = _("Appendix");
 444         int w = 0;
 445         int a = 0;
 446         int d = 0;
 447         font_metrics::rectText(label, pb_font, w, a, d);
 448
 449         int const text_start = int(xo_ + (width_ - w) / 2);
 450         int const text_end = text_start + w;
 451
 452         pain_.rectText(text_start, y + d, label, pb_font, LColor::none, LColor::none);
 453
 454         pain_.line(int(xo_ + 1), y, text_start, y, LColor::appendix);
 455         pain_.line(text_end, y, int(xo_ + width_ - 2), y, LColor::appendix);
 456
 457         return 3 * defaultRowHeight();
 458 }
 459
 460
 461 void RowPainter::paintFirst()
 462 {
 463         ParagraphParameters const & parparams = par_.params();
 464
 465         int y_top = 0;
 466
 467         // start of appendix?
 468         if (parparams.startOfAppendix())
 469                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 470
 471         Buffer const & buffer = *bv_.buffer();
 472
 473         LyXLayout_ptr const & layout = par_.layout();
 474
 475         if (buffer.params().paragraph_separation == BufferParams::PARSEP_SKIP) {
 476                 if (pit_ != 0) {
 477                         if (layout->latextype == LATEX_PARAGRAPH
 478                                 && !par_.getDepth()) {
 479                                 y_top += buffer.params().getDefSkip().inPixels(bv_);
 480                         } else {
 481                                 LyXLayout_ptr const & playout = pars_[pit_ - 1].layout();
 482                                 if (playout->latextype == LATEX_PARAGRAPH
 483                                         && !pars_[pit_ - 1].getDepth()) {
 484                                         // is it right to use defskip here, too? (AS)
 485                                         y_top += buffer.params().getDefSkip().inPixels(bv_);
 486                                 }
 487                         }
 488                 }
 489         }
 490
 491         bool const is_rtl = text_.isRTL(par_);
 492         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 493         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << std::endl;
 494
 495         // should we print a label?
 496         if (layout->labeltype >= LABEL_STATIC
 497             && (layout->labeltype != LABEL_STATIC
 498                       || layout->latextype != LATEX_ENVIRONMENT
 499                       || is_seq)) {
 500
 501                 LyXFont const font = getLabelFont();
 502                 string const str = par_.getLabelstring();
 503                 if (!str.empty()) {
 504                         double x = x_;
 505
 506                         // this is special code for the chapter layout. This is
 507                         // printed in an extra row and has a pagebreak at
 508                         // the top.
 509                         if (layout->counter == "chapter") {
 510                                 double spacing_val = 1.0;
 511                                 if (!parparams.spacing().isDefault()) {
 512                                         spacing_val = parparams.spacing().getValue();
 513                                 } else {
 514                                         spacing_val = buffer.params().spacing().getValue();
 515                                 }
 516 #ifdef WITH_WARNINGS
 517 #warning Look is this correct?
 518 #endif
 519                                 int const labeladdon = int(font_metrics::maxHeight(font) * layout->spacing.getValue() * spacing_val);
 520
 521                                 int const maxdesc = int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val)
 522                                         + int(layout->parsep) * defaultRowHeight();
 523
 524                                 if (is_rtl) {
 525                                         x = width_ - leftMargin() -
 526                                                 font_metrics::width(str, font);
 527                                 }
 528
 529                                 pain_.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 530                         } else {
 531                                 if (is_rtl) {
 532                                         x = width_ - leftMargin()
 533                                                 + font_metrics::width(layout->labelsep, font);
 534                                 } else {
 535                                         x = x_ - font_metrics::width(layout->labelsep, font)
 536                                                 - font_metrics::width(str, font);
 537                                 }
 538
 539                                 pain_.text(int(x), yo_, str, font);
 540                         }
 541                 }
 542
 543         // the labels at the top of an environment.
 544         // More or less for bibliography
 545         } else if (is_seq &&
 546                 (layout->labeltype == LABEL_TOP_ENVIRONMENT ||
 547                 layout->labeltype == LABEL_BIBLIO ||
 548                 layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 549                 LyXFont font = getLabelFont();
 550                 if (!par_.getLabelstring().empty()) {
 551                         string const str = par_.getLabelstring();
 552                         double spacing_val = 1.0;
 553                         if (!parparams.spacing().isDefault()) {
 554                                 spacing_val = parparams.spacing().getValue();
 555                         } else {
 556                                 spacing_val = buffer.params().spacing().getValue();
 557                         }
 558
 559                         int maxdesc =
 560                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val
 561                                 + (layout->labelbottomsep * defaultRowHeight()));
 562
 563                         double x = x_;
 564                         if (layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 565                                 x = ((is_rtl ? leftMargin() : x_)
 566                                          + width_ - text_.rightMargin(par_)) / 2;
 567                                 x -= font_metrics::width(str, font) / 2;
 568                         } else if (is_rtl) {
 569                                 x = width_ - leftMargin() -
 570                                         font_metrics::width(str, font);
 571                         }
 572                         pain_.text(int(x), yo_ - maxdesc, str, font);
 573                 }
 574         }
 575 }
 576
 577
 578 void RowPainter::paintLast()
 579 {
 580         bool const is_rtl = text_.isRTL(par_);
 581         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 582
 583         // draw an endlabel
 584         switch (endlabel) {
 585         case END_LABEL_BOX:
 586         case END_LABEL_FILLED_BOX: {
 587                 LyXFont const font = getLabelFont();
 588                 int const size = int(0.75 * font_metrics::maxAscent(font));
 589                 int const y = yo_ - size;
 590                 int x = is_rtl ? nestMargin() + changebarMargin() : width_ - size;
 591
 592                 if (width_ - int(row_.width()) <= size)
 593                         x += (size - width_ + row_.width() + 1) * (is_rtl ? -1 : 1);
 594
 595                 if (endlabel == END_LABEL_BOX)
 596                         pain_.rectangle(x, y, size, size, LColor::eolmarker);
 597                 else
 598                         pain_.fillRectangle(x, y, size, size, LColor::eolmarker);
 599                 break;
 600         }
 601
 602         case END_LABEL_STATIC: {
 603                 LyXFont font = getLabelFont();
 604                 string const & str = par_.layout()->endlabelstring();
 605                 double const x = is_rtl ?
 606                         x_ - font_metrics::width(str, font)
 607                         : - text_.rightMargin(par_) - row_.width();
 608                 pain_.text(int(x), yo_, str, font);
 609                 break;
 610         }
 611
 612         case END_LABEL_NO_LABEL:
 613                 break;
 614         }
 615 }
 616
 617
 618 void RowPainter::paintText()
 619 {
 620         pos_type const end = row_.endpos();
 621         pos_type body_pos = par_.beginOfBody();
 622         if (body_pos > 0 &&
 623                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 624                 body_pos = 0;
 625         }
 626
 627         LyXLayout_ptr const & layout = par_.layout();
 628
 629         bool running_strikeout = false;
 630         bool is_struckout = false;
 631         int last_strikeout_x = 0;
 632
 633         for (pos_type vpos = row_.pos(); vpos < end; ) {
 634                 if (x_ > bv_.workWidth())
 635                         break;
 636
 637                 pos_type const pos = text_.bidi.vis2log(vpos);
 638
 639                 if (pos >= par_.size()) {
 640                         ++vpos;
 641                         continue;
 642                 }
 643
 644                 const int width_pos = singleWidth(pos);
 645                 if (x_ + width_pos < 0) {
 646                         x_ += width_pos;
 647                         ++vpos;
 648                         continue;
 649                 }
 650
 651                 is_struckout = isDeletedText(par_, pos);
 652
 653                 if (is_struckout && !running_strikeout) {
 654                         running_strikeout = true;
 655                         last_strikeout_x = int(x_);
 656                 }
 657
 658                 bool const highly_editable_inset = par_.isInset(pos)
 659                         && isHighlyEditableInset(par_.getInset(pos));
 660
 661                 // if we reach the end of a struck out range, paint it
 662                 // we also don't paint across things like tables
 663                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 664                         // calculate 1/3 height of the buffer's default font
 665                         int const middle =
 666                                 yo_ - font_metrics::maxAscent(text_.defaultfont_) / 3;
 667                         pain_.line(last_strikeout_x, middle, int(x_), middle,
 668                                 LColor::strikeout, Painter::line_solid, Painter::line_thin);
 669                         running_strikeout = false;
 670                 }
 671
 672                 if (body_pos > 0 && pos == body_pos - 1) {
 673                         int const lwidth = font_metrics::width(layout->labelsep,
 674                                 getLabelFont());
 675
 676                         x_ += label_hfill_ + lwidth - width_pos;
 677                 }
 678
 679                 if (par_.isHfill(pos)) {
 680                         x_ += 1;
 681
 682                         int const y0 = yo_;
 683                         int const y1 = y0 - defaultRowHeight() / 2;
 684
 685                         pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 686
 687                         if (hfillExpansion(par_, row_, pos)) {
 688                                 int const y2 = (y0 + y1) / 2;
 689
 690                                 if (pos >= body_pos) {
 691                                         pain_.line(int(x_), y2, int(x_ + hfill_), y2,
 692                                                   LColor::added_space,
 693                                                   Painter::line_onoffdash);
 694                                         x_ += hfill_;
 695                                 } else {
 696                                         pain_.line(int(x_), y2, int(x_ + label_hfill_), y2,
 697                                                   LColor::added_space,
 698                                                   Painter::line_onoffdash);
 699                                         x_ += label_hfill_;
 700                                 }
 701                                 pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 702                         }
 703                         x_ += 2;
 704                         ++vpos;
 705                 } else if (par_.isSeparator(pos)) {
 706                         x_ += width_pos;
 707                         if (pos >= body_pos)
 708                                 x_ += separator_;
 709                         ++vpos;
 710                 } else {
 711                         paintFromPos(vpos);
 712                 }
 713         }
 714
 715         // if we reach the end of a struck out range, paint it
 716         if (running_strikeout) {
 717                 // calculate 1/3 height of the buffer's default font
 718                 int const middle =
 719                         yo_ - font_metrics::maxAscent(text_.defaultfont_) / 3;
 720                 pain_.line(last_strikeout_x, middle, int(x_), middle,
 721                         LColor::strikeout, Painter::line_solid, Painter::line_thin);
 722                 running_strikeout = false;
 723         }
 724 }
 725
 726
 727 void paintPar
 728         (PainterInfo & pi, LyXText const & text, pit_type pit, int x, int y)
 729 {
 730 //      lyxerr << "  paintPar: pit: " << pit << " at y: " << y << endl;
 731         static NullPainter nop;
 732         static PainterInfo nullpi(pi.base.bv, nop);
 733         int const ww = pi.base.bv->workHeight();
 734
 735         Paragraph & par = text.paragraphs()[pit];
 736
 737         RowList::const_iterator const rb = par.rows().begin();
 738         RowList::const_iterator const re = par.rows().end();
 739         theCoords.parPos()[&text][pit] = Point(x, y);
 740
 741         y -= rb->ascent();
 742         for (RowList::const_iterator rit = rb; rit != re; ++rit) {
 743                 y += rit->ascent();
 744                 bool const inside = (y + rit->descent() >= 0
 745                                        && y - rit->ascent() < ww);
 746                 RowPainter rp(inside ? pi : nullpi, text, pit, *rit, x, y);
 747
 748                 y += rit->descent();
 749                 rp.paintAppendix();
 750                 rp.paintDepthBar();
 751                 rp.paintChangeBar();
 752                 if (rit == rb)
 753                         rp.paintFirst();
 754                 if (rit + 1 == re)
 755                         rp.paintLast();
 756                 rp.paintText();
 757         }
 758 }
 759
 760 } // namespace anon
 761
 762
 763 void paintText(BufferView const & bv, ViewMetricsInfo const & vi)
 764 {
 765         Painter & pain = bv.painter();
 766         LyXText * const text = bv.text();
 767
 768         // clear background
 769         pain.fillRectangle(0, vi.y1, bv.workWidth(), vi.y2 - vi.y1,
 770                            LColor::background);
 771
 772         // draw selection
 773         PainterInfo pi(const_cast<BufferView *>(&bv), pain);
 774
 775         text->drawSelection(pi, 0, 0);
 776
 777         int yy = vi.y1;
 778         // draw contents
 779         for (pit_type pit = vi.p1; pit <= vi.p2; ++pit) {
 780                 yy += text->getPar(pit).ascent();
 781                 paintPar(pi, *bv.text(), pit, 0, yy);
 782                 yy += text->getPar(pit).descent();
 783         }
 784
 785
 786         // paint one paragraph above and one below
 787         // Note MV: this cannot be suppressed even for singlepar.
 788         // Try viewing the User Guide Mobius figure
 789         if (vi.p1 > 0) {
 790                 text->redoParagraph(vi.p1 - 1);
 791                 paintPar(pi, *bv.text(), vi.p1 - 1, 0,
 792                          vi.y1 -  text->getPar(vi.p1 - 1).descent());
 793         }
 794
 795         if (vi.p2 < lyx::pit_type(text->paragraphs().size()) - 1) {
 796                 text->redoParagraph(vi.p2 + 1);
 797                 paintPar(pi, *bv.text(), vi.p2 + 1, 0,
 798                          vi.y2 + text->getPar(vi.p2 + 1).ascent());
 799         }
 800
 801         // and grey out above (should not happen later)
 802 //      lyxerr << "par ascent: " << text->getPar(vi.p1).ascent() << endl;
 803         if (vi.y1 > 0)
 804                 pain.fillRectangle(0, 0, bv.workWidth(), vi.y1, LColor::bottomarea);
 805
 806         // and possibly grey out below
 807 //      lyxerr << "par descent: " << text->getPar(vi.p1).ascent() << endl;
 808         if (vi.y2 < bv.workHeight())
 809                 pain.fillRectangle(0, vi.y2, bv.workWidth(), bv.workHeight() - vi.y2, LColor::bottomarea);
 810 }
 811
 812
 813 void paintTextInset(LyXText const & text, PainterInfo & pi, int x, int y)
 814 {
 815 //      lyxerr << "  paintTextInset: y: " << y << endl;
 816
 817         y -= text.getPar(0).ascent();
 818         for (int pit = 0; pit < int(text.paragraphs().size()); ++pit) {
 819                 y += text.getPar(pit).ascent();
 820                 paintPar(pi, text, pit, x, y);
 821                 y += text.getPar(pit).descent();
 822         }
 823 }