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 "cursor.h"
  18 #include "debug.h"
  19 #include "bufferparams.h"
  20 #include "BufferView.h"
  21 #include "encoding.h"
  22 #include "gettext.h"
  23 #include "language.h"
  24 #include "LColor.h"
  25 #include "lyxrc.h"
  26 #include "lyxrow.h"
  27 #include "lyxrow_funcs.h"
  28 #include "metricsinfo.h"
  29 #include "paragraph.h"
  30 #include "paragraph_funcs.h"
  31 #include "ParagraphParameters.h"
  32 #include "vspace.h"
  33
  34 #include "frontends/font_metrics.h"
  35 #include "frontends/Painter.h"
  36
  37 #include "insets/insettext.h"
  38
  39 #include "support/textutils.h"
  40
  41
  42 using lyx::pos_type;
  43 using std::max;
  44 using std::string;
  45
  46 extern int PAPER_MARGIN;
  47 extern int CHANGEBAR_MARGIN;
  48 extern int LEFT_MARGIN;
  49
  50 namespace {
  51
  52 // "temporary". We'll never get to use more
  53 // references until we start adding hacks like
  54 // these until other places catch up.
  55 BufferView * perv(BufferView const & bv)
  56 {
  57         return const_cast<BufferView *>(&bv);
  58 }
  59
  60 /**
  61  * A class used for painting an individual row of text.
  62  */
  63 class RowPainter {
  64 public:
  65         /// initialise painter
  66         RowPainter(BufferView const & bv, LyXText const & text,
  67                 ParagraphList::iterator pit,
  68                 RowList::iterator rit, int y_offset, int x_offset, int y);
  69
  70         /// do the painting
  71         void paint();
  72 private:
  73         // paint various parts
  74         void paintBackground();
  75         void paintSelection();
  76         void paintAppendix();
  77         void paintDepthBar();
  78         void paintChangeBar();
  79         void paintFirst();
  80         void paintLast();
  81         void paintForeignMark(double orig_x, LyXFont const & orig_font);
  82         void paintHebrewComposeChar(lyx::pos_type & vpos);
  83         void paintArabicComposeChar(lyx::pos_type & vpos);
  84         void paintChars(lyx::pos_type & vpos, bool hebrew, bool arabic);
  85         int paintAppendixStart(int y);
  86         int paintLengthMarker(string const & prefix, VSpace const & vsp, int start);
  87         void paintText();
  88         void paintFromPos(lyx::pos_type & vpos);
  89         void paintInset(lyx::pos_type const pos);
  90
  91         /// return left margin
  92         int leftMargin() const;
  93
  94         /// return the font at the given pos
  95         LyXFont const getFont(lyx::pos_type pos) const;
  96
  97         /// return the label font for this row
  98         LyXFont const getLabelFont() const;
  99
 100         /// return pixel width for the given pos
 101         int singleWidth(lyx::pos_type pos) const;
 102         int singleWidth(lyx::pos_type pos, char c) const;
 103
 104         /// bufferview to paint on
 105         BufferView const & bv_;
 106
 107         /// Painter to use
 108         Painter & pain_;
 109
 110         /// LyXText for the row
 111         LyXText const & text_;
 112
 113         /// The row to paint
 114         RowList::iterator const rit_;
 115         Row & row_;
 116
 117         /// Row's paragraph
 118         mutable ParagraphList::iterator  pit_;
 119
 120         // Looks ugly - is
 121         double xo_;
 122         int yo_;
 123         double x_;
 124         int y_;
 125         int width_;
 126         double separator_;
 127         double hfill_;
 128         double label_hfill_;
 129 };
 130
 131
 132 RowPainter::RowPainter(BufferView const & bv, LyXText const & text,
 133      ParagraphList::iterator pit, RowList::iterator rit,
 134      int y_offset, int x_offset, int y)
 135         : bv_(bv), pain_(bv_.painter()), text_(text), rit_(rit), row_(*rit),
 136           pit_(pit), xo_(x_offset), yo_(y_offset),
 137                 x_(row_.x()), y_(y),
 138                 width_(text_.workWidth()),
 139                 separator_(row_.fill_separator()),
 140                 hfill_(row_.fill_hfill()),
 141                 label_hfill_(row_.fill_label_hfill())
 142 {}
 143
 144
 145 /// "temporary"
 146 LyXFont const RowPainter::getFont(pos_type pos) const
 147 {
 148         return text_.getFont(pit_, pos);
 149 }
 150
 151
 152 int RowPainter::singleWidth(lyx::pos_type pos) const
 153 {
 154         return text_.singleWidth(pit_, pos);
 155 }
 156
 157
 158 int RowPainter::singleWidth(lyx::pos_type pos, char c) const
 159 {
 160         LyXFont const & font = text_.getFont(pit_, pos);
 161         return text_.singleWidth(pit_, pos, c, font);
 162 }
 163
 164
 165 LyXFont const RowPainter::getLabelFont() const
 166 {
 167         return text_.getLabelFont(pit_);
 168 }
 169
 170
 171 int RowPainter::leftMargin() const
 172 {
 173         return text_.leftMargin(pit_, row_);
 174 }
 175
 176
 177 void RowPainter::paintInset(pos_type const pos)
 178 {
 179         InsetOld * inset = const_cast<InsetOld*>(pit_->getInset(pos));
 180
 181         BOOST_ASSERT(inset);
 182
 183         PainterInfo pi(perv(bv_));
 184         pi.base.font = getFont(pos);
 185         inset->draw(pi, int(x_), yo_ + row_.baseline());
 186         x_ += inset->width();
 187 }
 188
 189
 190 void RowPainter::paintHebrewComposeChar(pos_type & vpos)
 191 {
 192         pos_type pos = text_.bidi.vis2log(vpos);
 193
 194         string str;
 195
 196         // first char
 197         char c = pit_->getChar(pos);
 198         str += c;
 199         ++vpos;
 200
 201         LyXFont const & font = getFont(pos);
 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 = pit_->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_ + row_.baseline(), str, font);
 221 }
 222
 223
 224 void RowPainter::paintArabicComposeChar(pos_type & vpos)
 225 {
 226         pos_type pos = text_.bidi.vis2log(vpos);
 227         string str;
 228
 229         // first char
 230         char c = pit_->getChar(pos);
 231         c = pit_->transformChar(c, pos);
 232         str +=c;
 233         ++vpos;
 234
 235         LyXFont const & font = getFont(pos);
 236         int const width = font_metrics::width(c, font);
 237         int dx = 0;
 238
 239         for (pos_type i = pos - 1; i >= 0; --i) {
 240                 c = pit_->getChar(i);
 241                 if (!Encodings::IsComposeChar_arabic(c)) {
 242                         if (IsPrintableNonspace(c)) {
 243                                 int const width2 = singleWidth(i, c);
 244                                 dx = (width2 - width) / 2;
 245                         }
 246                         break;
 247                 }
 248         }
 249         // Draw nikud
 250         pain_.text(int(x_) + dx, yo_ + row_.baseline(), str, font);
 251 }
 252
 253
 254 void RowPainter::paintChars(pos_type & vpos, bool hebrew, bool arabic)
 255 {
 256         pos_type pos = text_.bidi.vis2log(vpos);
 257         pos_type const end = row_.endpos();
 258         LyXFont orig_font = getFont(pos);
 259
 260         // first character
 261         string str;
 262         str += pit_->getChar(pos);
 263         if (arabic) {
 264                 unsigned char c = str[0];
 265                 str[0] = pit_->transformChar(c, pos);
 266         }
 267
 268         bool prev_struckout = isDeletedText(*pit_, pos);
 269         bool prev_newtext = isInsertedText(*pit_, pos);
 270
 271         // collect as much similar chars as we can
 272         for (++vpos; vpos < end && (pos = text_.bidi.vis2log(vpos)) >= 0; ++vpos) {
 273                 char c = pit_->getChar(pos);
 274
 275                 if (!IsPrintableNonspace(c))
 276                         break;
 277
 278                 if (prev_struckout != isDeletedText(*pit_, pos))
 279                         break;
 280
 281                 if (prev_newtext != isInsertedText(*pit_, pos))
 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 (orig_font != getFont(pos))
 291                         break;
 292
 293                 if (arabic)
 294                         c = pit_->transformChar(c, pos);
 295
 296                 str += c;
 297         }
 298
 299         if (prev_struckout)
 300                 orig_font.setColor(LColor::strikeout);
 301         else if (prev_newtext)
 302                 orig_font.setColor(LColor::newtext);
 303
 304         // Draw text and set the new x position
 305         //lyxerr << "paint row: yo_ " << yo_ << " baseline: " << row_.baseline()
 306         //      << "\n";
 307         pain_.text(int(x_), yo_ + row_.baseline(), str, orig_font);
 308         x_ += font_metrics::width(str, orig_font);
 309 }
 310
 311
 312 void RowPainter::paintForeignMark(double orig_x, LyXFont const & orig_font)
 313 {
 314         if (!lyxrc.mark_foreign_language)
 315                 return;
 316         if (orig_font.language() == latex_language)
 317                 return;
 318         if (orig_font.language() == bv_.buffer()->params().language)
 319                 return;
 320
 321         int const y = yo_ + row_.baseline() + 1;
 322         pain_.line(int(orig_x), y, int(x_), y, LColor::language);
 323 }
 324
 325
 326 void RowPainter::paintFromPos(pos_type & vpos)
 327 {
 328         pos_type const pos = text_.bidi.vis2log(vpos);
 329
 330         LyXFont const & orig_font = getFont(pos);
 331
 332         double const orig_x = x_;
 333
 334         char const c = pit_->getChar(pos);
 335
 336         if (c == Paragraph::META_INSET) {
 337                 paintInset(pos);
 338                 ++vpos;
 339                 paintForeignMark(orig_x, orig_font);
 340                 return;
 341         }
 342
 343         // usual characters, no insets
 344
 345         // special case languages
 346         bool const hebrew = (orig_font.language()->lang() == "hebrew");
 347         bool const arabic =
 348                 orig_font.language()->lang() == "arabic" &&
 349                 (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 350                 lyxrc.font_norm_type == LyXRC::ISO_10646_1);
 351
 352         // draw as many chars as we can
 353         if ((!hebrew && !arabic)
 354                 || (hebrew && !Encodings::IsComposeChar_hebrew(c))
 355                 || (arabic && !Encodings::IsComposeChar_arabic(c))) {
 356                 paintChars(vpos, hebrew, arabic);
 357         } else if (hebrew) {
 358                 paintHebrewComposeChar(vpos);
 359         } else if (arabic) {
 360                 paintArabicComposeChar(vpos);
 361         }
 362
 363         paintForeignMark(orig_x, orig_font);
 364
 365         return;
 366 }
 367
 368
 369 void RowPainter::paintBackground()
 370 {
 371         int const x = int(xo_);
 372         int const y = yo_ < 0 ? 0 : yo_;
 373         int const h = yo_ < 0 ? row_.height() + yo_ : row_.height();
 374         pain_.fillRectangle(x, y, width_, h, text_.backgroundColor());
 375 }
 376
 377
 378 void RowPainter::paintSelection()
 379 {
 380         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params());
 381
 382         // the current selection
 383         int const startx = text_.selection.start.x();
 384         int const endx = text_.selection.end.x();
 385         int const starty = text_.selection.start.y();
 386         int const endy = text_.selection.end.y();
 387         ParagraphList::iterator startpit = text_.getPar(text_.selection.start);
 388         ParagraphList::iterator endpit = text_.getPar(text_.selection.end);
 389         RowList::iterator startrow = startpit->getRow(text_.selection.start.pos());
 390         RowList::iterator endrow = endpit->getRow(text_.selection.end.pos());
 391         int const h = row_.height();
 392
 393         int const row_y = pit_->y + row_.y_offset();
 394
 395         if (text_.bidi.same_direction()) {
 396                 int x;
 397                 int y = yo_;
 398                 int w;
 399                 if (startrow == rit_ && endrow == rit_) {
 400                         if (startx < endx) {
 401                                 x = int(xo_) + startx;
 402                                 w = endx - startx;
 403                         } else {
 404                                 x = int(xo_) + endx;
 405                                 w = startx - endx;
 406                         }
 407                         pain_.fillRectangle(x, y, w, h, LColor::selection);
 408                 } else if (startrow == rit_) {
 409                         int const x = is_rtl ? int(xo_) : int(xo_ + startx);
 410                         int const w = is_rtl ? startx : (width_ - startx);
 411                         pain_.fillRectangle(x, y, w, h, LColor::selection);
 412                 } else if (endrow == rit_) {
 413                         int const x = is_rtl ? int(xo_ + endx) : int(xo_);
 414                         int const w = is_rtl ? (width_ - endx) : endx;
 415                         pain_.fillRectangle(x, y, w, h, LColor::selection);
 416                 } else if (row_y > starty && row_y < endy) {
 417
 418                         pain_.fillRectangle(int(xo_), y, width_, h, LColor::selection);
 419                 }
 420                 return;
 421         }
 422
 423         if (startrow != rit_ && endrow != rit_) {
 424                 if (y_ > starty && y_ < endy) {
 425                         int w = width_;
 426                         pain_.fillRectangle(int(xo_), yo_, w, h, LColor::selection);
 427                 }
 428                 return;
 429         }
 430
 431         if ((startrow != rit_ && !is_rtl) || (endrow != rit_ && is_rtl))
 432                 pain_.fillRectangle(int(xo_), yo_,
 433                         int(x_), h, LColor::selection);
 434
 435         pos_type const body_pos = pit_->beginOfBody();
 436         pos_type const end = row_.endpos();
 437         double tmpx = x_;
 438
 439         for (pos_type vpos = row_.pos(); vpos < end; ++vpos)  {
 440                 pos_type pos = text_.bidi.vis2log(vpos);
 441                 double const old_tmpx = tmpx;
 442                 if (body_pos > 0 && pos == body_pos - 1) {
 443                         LyXLayout_ptr const & layout = pit_->layout();
 444                         LyXFont const lfont = getLabelFont();
 445
 446                         tmpx += label_hfill_ + font_metrics::width(layout->labelsep, lfont);
 447
 448                         if (pit_->isLineSeparator(body_pos - 1))
 449                                 tmpx -= singleWidth(body_pos - 1);
 450                 }
 451
 452                 if (hfillExpansion(*pit_, row_, pos)) {
 453                         tmpx += singleWidth(pos);
 454                         if (pos >= body_pos)
 455                                 tmpx += hfill_;
 456                         else
 457                                 tmpx += label_hfill_;
 458                 }
 459
 460                 else if (pit_->isSeparator(pos)) {
 461                         tmpx += singleWidth(pos);
 462                         if (pos >= body_pos)
 463                                 tmpx += separator_;
 464                 } else {
 465                         tmpx += singleWidth(pos);
 466                 }
 467
 468                 if ((startrow != rit_ || text_.selection.start.pos() <= pos) &&
 469                         (endrow != rit_ || pos < text_.selection.end.pos())) {
 470                         // Here we do not use x_ as xo_ was added to x_.
 471                         pain_.fillRectangle(int(old_tmpx), yo_,
 472                                 int(tmpx - old_tmpx + 1), h, LColor::selection);
 473                 }
 474         }
 475
 476         if ((startrow != rit_ && is_rtl) || (endrow != rit_ && !is_rtl)) {
 477                 pain_.fillRectangle(int(xo_ + tmpx),
 478                         yo_, int(bv_.workWidth() - tmpx), h, LColor::selection);
 479         }
 480 }
 481
 482
 483 void RowPainter::paintChangeBar()
 484 {
 485         pos_type const start = row_.pos();
 486         pos_type const end = row_.endpos();
 487
 488         if (start == end || !pit_->isChanged(start, end - 1))
 489                 return;
 490
 491         int const height = text_.isLastRow(pit_, row_)
 492                 ? row_.baseline()
 493                 : row_.height() + boost::next(rit_)->top_of_text();
 494
 495         pain_.fillRectangle(4, yo_, 5, height, LColor::changebar);
 496 }
 497
 498
 499 void RowPainter::paintAppendix()
 500 {
 501         if (!pit_->params().appendix())
 502                 return;
 503
 504         // FIXME: can be just width_ ?
 505         int const ww = bv_.workWidth();
 506
 507         int y = yo_;
 508
 509         if (pit_->params().startOfAppendix())
 510                 y += 2 * defaultRowHeight();
 511
 512         pain_.line(1, y, 1, yo_ + row_.height(), LColor::appendix);
 513         pain_.line(ww - 2, y, ww - 2, yo_ + row_.height(), LColor::appendix);
 514 }
 515
 516
 517 void RowPainter::paintDepthBar()
 518 {
 519         Paragraph::depth_type const depth = pit_->getDepth();
 520
 521         if (depth <= 0)
 522                 return;
 523
 524         Paragraph::depth_type prev_depth = 0;
 525         if (!text_.isFirstRow(pit_, row_)) {
 526                 ParagraphList::iterator pit2 = pit_;
 527                 if (row_.pos() == 0)
 528                         --pit2;
 529                 prev_depth = pit2->getDepth();
 530         }
 531
 532         Paragraph::depth_type next_depth = 0;
 533         if (!text_.isLastRow(pit_, row_)) {
 534                 ParagraphList::iterator pit2 = pit_;
 535                 if (row_.endpos() >= pit2->size())
 536                         ++pit2;
 537                 next_depth = pit2->getDepth();
 538         }
 539
 540         for (Paragraph::depth_type i = 1; i <= depth; ++i) {
 541                 int const w = PAPER_MARGIN / 5;
 542                 int x = int(w * i + xo_);
 543                 // only consider the changebar space if we're drawing outer left
 544                 if (xo_ == 0)
 545                         x += CHANGEBAR_MARGIN;
 546                 int const h = yo_ + row_.height() - 1 - (i - next_depth - 1) * 3;
 547
 548                 pain_.line(x, yo_, x, h, LColor::depthbar);
 549
 550                 if (i > prev_depth)
 551                         pain_.fillRectangle(x, yo_, w, 2, LColor::depthbar);
 552                 if (i > next_depth)
 553                         pain_.fillRectangle(x, h, w, 2, LColor::depthbar);
 554         }
 555 }
 556
 557
 558 int RowPainter::paintLengthMarker(string const & prefix, VSpace const & vsp,
 559         int start)
 560 {
 561         if (vsp.kind() == VSpace::NONE)
 562                 return 0;
 563
 564         int const arrow_size = 4;
 565         int const size = getLengthMarkerHeight(bv_, vsp);
 566         int const end = start + size;
 567
 568         // the label to display (if any)
 569         string str;
 570         // y-values for top arrow
 571         int ty1, ty2;
 572         // y-values for bottom arrow
 573         int by1, by2;
 574
 575         str = prefix + " (" + vsp.asLyXCommand() + ")";
 576
 577         if (vsp.kind() == VSpace::VFILL) {
 578                 ty1 = ty2 = start;
 579                 by1 = by2 = end;
 580         } else {
 581                 // adding or removing space
 582                 bool const added = vsp.kind() != VSpace::LENGTH ||
 583                                    vsp.length().len().value() > 0.0;
 584                 ty1 = added ? (start + arrow_size) : start;
 585                 ty2 = added ? start : (start + arrow_size);
 586                 by1 = added ? (end - arrow_size) : end;
 587                 by2 = added ? end : (end - arrow_size);
 588         }
 589
 590         int const leftx = int(xo_) + leftMargin();
 591         int const midx = leftx + arrow_size;
 592         int const rightx = midx + arrow_size;
 593
 594         // first the string
 595         int w = 0;
 596         int a = 0;
 597         int d = 0;
 598
 599         LyXFont font;
 600         font.setColor(LColor::added_space);
 601         font.decSize();
 602         font.decSize();
 603         font_metrics::rectText(str, font, w, a, d);
 604
 605         pain_.rectText(leftx + 2 * arrow_size + 5,
 606                        start + ((end - start) / 2) + d,
 607                        str, font,
 608                        LColor::none, LColor::none);
 609
 610         // top arrow
 611         pain_.line(leftx, ty1, midx, ty2, LColor::added_space);
 612         pain_.line(midx, ty2, rightx, ty1, LColor::added_space);
 613
 614         // bottom arrow
 615         pain_.line(leftx, by1, midx, by2, LColor::added_space);
 616         pain_.line(midx, by2, rightx, by1, LColor::added_space);
 617
 618         // joining line
 619         pain_.line(midx, ty2, midx, by2, LColor::added_space);
 620
 621         return size;
 622 }
 623
 624
 625 int RowPainter::paintAppendixStart(int y)
 626 {
 627         LyXFont pb_font;
 628         pb_font.setColor(LColor::appendix);
 629         pb_font.decSize();
 630
 631         string const label = _("Appendix");
 632         int w = 0;
 633         int a = 0;
 634         int d = 0;
 635         font_metrics::rectText(label, pb_font, w, a, d);
 636
 637         int const text_start = int(xo_ + (width_ - w) / 2);
 638         int const text_end = text_start + w;
 639
 640         pain_.rectText(text_start, y + d, label, pb_font, LColor::none, LColor::none);
 641
 642         pain_.line(int(xo_ + 1), y, text_start, y, LColor::appendix);
 643         pain_.line(text_end, y, int(xo_ + width_ - 2), y, LColor::appendix);
 644
 645         return 3 * defaultRowHeight();
 646 }
 647
 648
 649 void RowPainter::paintFirst()
 650 {
 651         ParagraphParameters const & parparams = pit_->params();
 652
 653         int y_top = 0;
 654
 655         // start of appendix?
 656         if (parparams.startOfAppendix())
 657                 y_top += paintAppendixStart(yo_ + y_top + 2 * defaultRowHeight());
 658
 659         // the top margin
 660         if (text_.isFirstRow(pit_, row_) && !text_.isInInset())
 661                 y_top += PAPER_MARGIN;
 662
 663         // draw the additional space if needed:
 664         y_top += paintLengthMarker(_("Space above"), parparams.spaceTop(),
 665                         yo_ + y_top);
 666
 667         Buffer const & buffer = *bv_.buffer();
 668
 669         LyXLayout_ptr const & layout = pit_->layout();
 670
 671         if (buffer.params().paragraph_separation == BufferParams::PARSEP_SKIP) {
 672                 if (pit_ != text_.ownerParagraphs().begin()) {
 673                         if (layout->latextype == LATEX_PARAGRAPH
 674                                 && !pit_->getDepth()) {
 675                                 y_top += buffer.params().getDefSkip().inPixels(bv_);
 676                         } else {
 677                                 LyXLayout_ptr const & playout =
 678                                         boost::prior(pit_)->layout();
 679                                 if (playout->latextype == LATEX_PARAGRAPH
 680                                         && !boost::prior(pit_)->getDepth()) {
 681                                         // is it right to use defskip here, too? (AS)
 682                                         y_top += buffer.params().getDefSkip().inPixels(bv_);
 683                                 }
 684                         }
 685                 }
 686         }
 687
 688         int const ww = bv_.workWidth();
 689
 690         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params());
 691         bool const is_seq = isFirstInSequence(pit_, text_.ownerParagraphs());
 692         //lyxerr << "paintFirst: " << pit_->id() << " is_seq: " << is_seq << std::endl;
 693
 694         // should we print a label?
 695         if (layout->labeltype >= LABEL_STATIC
 696             && (layout->labeltype != LABEL_STATIC
 697                       || layout->latextype != LATEX_ENVIRONMENT
 698                       || is_seq)) {
 699
 700                 LyXFont font = getLabelFont();
 701                 if (!pit_->getLabelstring().empty()) {
 702                         double x = x_;
 703                         string const str = pit_->getLabelstring();
 704
 705                         // this is special code for the chapter layout. This is
 706                         // printed in an extra row and has a pagebreak at
 707                         // the top.
 708                         if (layout->counter == "chapter") {
 709                                 if (buffer.params().secnumdepth >= 0) {
 710                                         float spacing_val = 1.0;
 711                                         if (!parparams.spacing().isDefault()) {
 712                                                 spacing_val = parparams.spacing().getValue();
 713                                         } else {
 714                                                 spacing_val = buffer.params().spacing().getValue();
 715                                         }
 716
 717                                         int const maxdesc =
 718                                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val)
 719                                                 + int(layout->parsep) * defaultRowHeight();
 720
 721                                         if (is_rtl) {
 722                                                 x = ww - leftMargin() -
 723                                                         font_metrics::width(str, font);
 724                                         }
 725
 726                                         pain_.text(int(x),
 727                                                 yo_ + row_.baseline() -
 728                                                 row_.ascent_of_text() - maxdesc,
 729                                                 str, font);
 730                                 }
 731                         } else {
 732                                 if (is_rtl) {
 733                                         x = ww - leftMargin()
 734                                                 + font_metrics::width(layout->labelsep, font);
 735                                 } else {
 736                                         x = x_ - font_metrics::width(layout->labelsep, font)
 737                                                 - font_metrics::width(str, font);
 738                                 }
 739
 740                                 pain_.text(int(x), yo_ + row_.baseline(), str, font);
 741                         }
 742                 }
 743
 744         // the labels at the top of an environment.
 745         // More or less for bibliography
 746         } else if (is_seq &&
 747                 (layout->labeltype == LABEL_TOP_ENVIRONMENT ||
 748                 layout->labeltype == LABEL_BIBLIO ||
 749                 layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 750                 LyXFont font = getLabelFont();
 751                 if (!pit_->getLabelstring().empty()) {
 752                         string const str = pit_->getLabelstring();
 753                         float spacing_val = 1.0;
 754                         if (!parparams.spacing().isDefault()) {
 755                                 spacing_val = parparams.spacing().getValue();
 756                         } else {
 757                                 spacing_val = buffer.params().spacing().getValue();
 758                         }
 759
 760                         int maxdesc =
 761                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val
 762                                 + (layout->labelbottomsep * defaultRowHeight()));
 763
 764                         double x = x_;
 765                         if (layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 766                                 x = ((is_rtl ? leftMargin() : x_)
 767                                          + ww - text_.rightMargin(*pit_, *bv_.buffer())) / 2;
 768                                 x -= font_metrics::width(str, font) / 2;
 769                         } else if (is_rtl) {
 770                                 x = ww - leftMargin() -
 771                                         font_metrics::width(str, font);
 772                         }
 773                         pain_.text(int(x),
 774                             yo_ + row_.baseline() - row_.ascent_of_text() - maxdesc,
 775                                   str, font);
 776                 }
 777         }
 778 }
 779
 780
 781 void RowPainter::paintLast()
 782 {
 783         ParagraphParameters const & parparams = pit_->params();
 784         int y_bottom = row_.height() - 1;
 785
 786         // the bottom margin
 787         if (text_.isLastRow(pit_, row_) && !text_.isInInset())
 788                 y_bottom -= PAPER_MARGIN;
 789
 790         int const ww = bv_.workWidth();
 791
 792         // draw the additional space if needed:
 793         int const height = getLengthMarkerHeight(bv_, parparams.spaceBottom());
 794         y_bottom -= paintLengthMarker(_("Space below"), parparams.spaceBottom(),
 795                              yo_ + y_bottom - height);
 796
 797         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params());
 798         int const endlabel = getEndLabel(pit_, text_.ownerParagraphs());
 799
 800         // draw an endlabel
 801         switch (endlabel) {
 802         case END_LABEL_BOX:
 803         case END_LABEL_FILLED_BOX: {
 804                 LyXFont const font = getLabelFont();
 805                 int const size = int(0.75 * font_metrics::maxAscent(font));
 806                 int const y = yo_ + row_.baseline() - size;
 807                 int x = is_rtl ? LEFT_MARGIN : ww - PAPER_MARGIN - size;
 808
 809                 if (row_.fill() <= size)
 810                         x += (size - row_.fill() + 1) * (is_rtl ? -1 : 1);
 811
 812                 if (endlabel == END_LABEL_BOX)
 813                         pain_.rectangle(x, y, size, size, LColor::eolmarker);
 814                 else
 815                         pain_.fillRectangle(x, y, size, size, LColor::eolmarker);
 816                 break;
 817         }
 818
 819         case END_LABEL_STATIC: {
 820                 LyXFont font = getLabelFont();
 821                 string const & str = pit_->layout()->endlabelstring();
 822                 double const x = is_rtl ?
 823                         x_ - font_metrics::width(str, font)
 824                         : ww - text_.rightMargin(*pit_, *bv_.buffer()) - row_.fill();
 825                 pain_.text(int(x), yo_ + row_.baseline(), str, font);
 826                 break;
 827         }
 828
 829         case END_LABEL_NO_LABEL:
 830                 break;
 831         }
 832 }
 833
 834
 835 void RowPainter::paintText()
 836 {
 837         pos_type const end = row_.endpos();
 838         pos_type body_pos = pit_->beginOfBody();
 839         if (body_pos > 0 &&
 840                 (body_pos > end || !pit_->isLineSeparator(body_pos - 1))) {
 841                 body_pos = 0;
 842         }
 843
 844         LyXLayout_ptr const & layout = pit_->layout();
 845
 846         bool running_strikeout = false;
 847         bool is_struckout = false;
 848         int last_strikeout_x = 0;
 849
 850         for (pos_type vpos = row_.pos(); vpos < end; ) {
 851                 if (x_ > bv_.workWidth())
 852                         break;
 853
 854                 pos_type pos = text_.bidi.vis2log(vpos);
 855
 856                 if (pos >= pit_->size()) {
 857                         ++vpos;
 858                         continue;
 859                 }
 860
 861                 if (x_ + singleWidth(pos) < 0) {
 862                         x_ += singleWidth(pos);
 863                         ++vpos;
 864                         continue;
 865                 }
 866
 867                 is_struckout = isDeletedText(*pit_, pos);
 868
 869                 if (is_struckout && !running_strikeout) {
 870                         running_strikeout = true;
 871                         last_strikeout_x = int(x_);
 872                 }
 873
 874                 bool const highly_editable_inset = pit_->isInset(pos)
 875                         && isHighlyEditableInset(pit_->getInset(pos));
 876
 877                 // if we reach the end of a struck out range, paint it
 878                 // we also don't paint across things like tables
 879                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 880                         int const middle = yo_ + (row_.baseline() + row_.top_of_text()) / 2;
 881                         pain_.line(last_strikeout_x, middle, int(x_), middle,
 882                                 LColor::strikeout, Painter::line_solid, Painter::line_thin);
 883                         running_strikeout = false;
 884                 }
 885
 886                 if (body_pos > 0 && pos == body_pos - 1) {
 887                         int const lwidth = font_metrics::width(layout->labelsep,
 888                                 getLabelFont());
 889
 890                         x_ += label_hfill_ + lwidth - singleWidth(body_pos - 1);
 891                 }
 892
 893                 if (pit_->isHfill(pos)) {
 894                         x_ += 1;
 895
 896                         int const y0 = yo_ + row_.baseline();
 897                         int const y1 = y0 - defaultRowHeight() / 2;
 898
 899                         pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 900
 901                         if (hfillExpansion(*pit_, row_, pos)) {
 902                                 int const y2 = (y0 + y1) / 2;
 903
 904                                 if (pos >= body_pos) {
 905                                         pain_.line(int(x_), y2, int(x_ + hfill_), y2,
 906                                                   LColor::added_space,
 907                                                   Painter::line_onoffdash);
 908                                         x_ += hfill_;
 909                                 } else {
 910                                         pain_.line(int(x_), y2, int(x_ + label_hfill_), y2,
 911                                                   LColor::added_space,
 912                                                   Painter::line_onoffdash);
 913                                         x_ += label_hfill_;
 914                                 }
 915                                 pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 916                         }
 917                         x_ += 2;
 918                         ++vpos;
 919                 } else if (pit_->isSeparator(pos)) {
 920                         x_ += singleWidth(pos);
 921                         if (pos >= body_pos)
 922                                 x_ += separator_;
 923                         ++vpos;
 924                 } else {
 925                         paintFromPos(vpos);
 926                 }
 927         }
 928
 929         // if we reach the end of a struck out range, paint it
 930         if (running_strikeout) {
 931                 int const middle = yo_ + (row_.baseline() + row_.top_of_text()) / 2;
 932                 pain_.line(last_strikeout_x, middle, int(x_), middle,
 933                         LColor::strikeout, Painter::line_solid, Painter::line_thin);
 934                 running_strikeout = false;
 935         }
 936 }
 937
 938
 939 void RowPainter::paint()
 940 {
 941         // FIXME: what is this fixing ?
 942         if (text_.isInInset() && x_ < 0)
 943                 x_ = 0;
 944         x_ += xo_;
 945
 946         // background has already been cleared.
 947         if (&text_ == bv_.text)
 948                 paintBackground();
 949
 950         // paint the selection background
 951         if (text_.selection.set() && &text_ == bv_.cursor().innerText())
 952                 paintSelection();
 953
 954         // vertical lines for appendix
 955         paintAppendix();
 956
 957         // environment depth brackets
 958         paintDepthBar();
 959
 960         // changebar
 961         paintChangeBar();
 962
 963         if (row_.pos() == 0)
 964                 paintFirst();
 965
 966         if (row_.endpos() >= pit_->size())
 967                 paintLast();
 968
 969         // paint text
 970         paintText();
 971 }
 972
 973
 974 int paintRows(BufferView const & bv, LyXText const & text,
 975         ParagraphList::iterator pit, RowList::iterator rit,
 976         int xo, int y, int yf, int yo)
 977 {
 978         //lyxerr << "  paintRows: rit: " << &*rit << endl;
 979         int const yy = yf - y;
 980         int const y2 = bv.painter().paperHeight();
 981
 982         ParagraphList::iterator end = text.ownerParagraphs().end();
 983         bool active = false;
 984
 985         for ( ; pit != end; ++pit) {
 986                 RowList::iterator row = pit->rows.begin();
 987                 RowList::iterator rend = pit->rows.end();
 988
 989                 for ( ; row != rend; ++row) {
 990                         if (row == rit)
 991                                 active = true;
 992                         if (active) {
 993                                 RowPainter painter(bv, text, pit, row, y + yo, xo, y + bv.top_y());
 994                                 painter.paint();
 995                                 y += row->height();
 996                         } else {
 997                                 //lyxerr << "   paintRows: row: " << &*row << " ignored" << endl;
 998                         }
 999                 }
1000                 if (yy + y >= y2)
1001                         return y;
1002         }
1003
1004         return y;
1005 }
1006
1007 } // namespace anon
1008
1009
1010 int paintText(BufferView & bv)
1011 {
1012         int const topy = bv.top_y();
1013         ParagraphList::iterator pit;
1014         RowList::iterator rit = bv.text->getRowNearY(topy, pit);
1015         int const y = pit->y + rit->y_offset() - topy;
1016         return paintRows(bv, *bv.text, pit, rit, 0, y, y, 0);
1017 }
1018
1019
1020 void paintTextInset(BufferView & bv, LyXText & text, int x, int baseline)
1021 {
1022         RowList::iterator rit = text.firstRow();
1023         RowList::iterator end = text.endRow();
1024         ParagraphList::iterator pit = text.ownerParagraphs().begin();
1025
1026         int y_offset = baseline - rit->ascent_of_text();
1027         int y = y_offset;
1028         while (rit != end && y + rit->height() <= 0) {
1029                 y += rit->height();
1030                 text.nextRow(pit, rit);
1031         }
1032         if (y_offset < 0)
1033                 paintRows(bv, text, pit, rit, x, 0, y, y);
1034         else
1035                 paintRows(bv, text, pit, rit, x, 0, y_offset, y_offset);
1036 }
1037
1038
1039 int getLengthMarkerHeight(BufferView const & bv, VSpace const & vsp)
1040 {
1041         if (vsp.kind() == VSpace::NONE)
1042                 return 0;
1043
1044         int const arrow_size = 4;
1045         int const space_size = vsp.inPixels(bv);
1046
1047         LyXFont font;
1048         font.decSize();
1049         int const min_size = max(3 * arrow_size, font_metrics::maxHeight(font));
1050
1051         if (vsp.length().len().value() < 0.0)
1052                 return min_size;
1053         else
1054                 return max(min_size, space_size);
1055 }