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 "debug.h"
  18 #include "bufferparams.h"
  19 #include "BufferView.h"
  20 #include "encoding.h"
  21 #include "gettext.h"
  22 #include "language.h"
  23 #include "LColor.h"
  24 #include "lyxrc.h"
  25 #include "lyxrow.h"
  26 #include "lyxrow_funcs.h"
  27 #include "metricsinfo.h"
  28 #include "paragraph.h"
  29 #include "paragraph_funcs.h"
  30 #include "ParagraphParameters.h"
  31 #include "vspace.h"
  32
  33 #include "frontends/font_metrics.h"
  34 #include "frontends/Painter.h"
  35
  36 #include "insets/insettext.h"
  37
  38 #include "support/textutils.h"
  39
  40
  41 using lyx::pos_type;
  42 using std::max;
  43 using std::string;
  44
  45 extern int PAPER_MARGIN;
  46 extern int CHANGEBAR_MARGIN;
  47 extern int LEFT_MARGIN;
  48
  49 namespace {
  50
  51 // "temporary". We'll never get to use more
  52 // references until we start adding hacks like
  53 // these until other places catch up.
  54 BufferView * perv(BufferView const & bv)
  55 {
  56         return const_cast<BufferView *>(&bv);
  57 }
  58
  59 /**
  60  * A class used for painting an individual row of text.
  61  */
  62 class RowPainter {
  63 public:
  64         /// initialise painter
  65         RowPainter(BufferView const & bv, LyXText const & text,
  66                 ParagraphList::iterator pit,
  67                 RowList::iterator rit, int y_offset, int x_offset, int y);
  68
  69         /// do the painting
  70         void paint();
  71 private:
  72         // paint various parts
  73         void paintBackground();
  74         void paintSelection();
  75         void paintAppendix();
  76         void paintDepthBar();
  77         void paintChangeBar();
  78         void paintFirst();
  79         void paintLast();
  80         void paintForeignMark(double orig_x, LyXFont const & orig_font);
  81         void paintHebrewComposeChar(lyx::pos_type & vpos);
  82         void paintArabicComposeChar(lyx::pos_type & vpos);
  83         void paintChars(lyx::pos_type & vpos, bool hebrew, bool arabic);
  84         int paintPageBreak(string const & label, int y);
  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         char const transformChar(char c, lyx::pos_type pos) const;
 101
 102         /// return pixel width for the given pos
 103         int singleWidth(lyx::pos_type pos) const;
 104         int singleWidth(lyx::pos_type pos, char c) const;
 105
 106         /// bufferview to paint on
 107         BufferView const & bv_;
 108
 109         /// Painter to use
 110         Painter & pain_;
 111
 112         /// LyXText for the row
 113         LyXText const & text_;
 114
 115         /// The row to paint
 116         RowList::iterator const rit_;
 117         Row & row_;
 118
 119         /// Row's paragraph
 120         mutable ParagraphList::iterator  pit_;
 121
 122         // Looks ugly - is
 123         double xo_;
 124         int yo_;
 125         double x_;
 126         int y_;
 127         int width_;
 128         double separator_;
 129         double hfill_;
 130         double label_hfill_;
 131 };
 132
 133
 134 RowPainter::RowPainter(BufferView const & bv, LyXText const & text,
 135      ParagraphList::iterator pit, RowList::iterator rit,
 136      int y_offset, int x_offset, int y)
 137         : bv_(bv), pain_(bv_.painter()), text_(text), rit_(rit), row_(*rit),
 138           pit_(pit), xo_(x_offset), yo_(y_offset), y_(y)
 139 {}
 140
 141
 142 /// "temporary"
 143 LyXFont const RowPainter::getFont(pos_type pos) const
 144 {
 145         return text_.getFont(pit_, pos);
 146 }
 147
 148
 149 int RowPainter::singleWidth(lyx::pos_type pos) const
 150 {
 151         return text_.singleWidth(pit_, pos);
 152 }
 153
 154
 155 int RowPainter::singleWidth(lyx::pos_type pos, char c) const
 156 {
 157         LyXFont const & font = text_.getFont(pit_, pos);
 158         return text_.singleWidth(pit_, pos, c, font);
 159 }
 160
 161
 162 LyXFont const RowPainter::getLabelFont() const
 163 {
 164         return text_.getLabelFont(pit_);
 165 }
 166
 167
 168 char const RowPainter::transformChar(char c, lyx::pos_type pos) const
 169 {
 170         return text_.transformChar(c, *pit_, pos);
 171 }
 172
 173
 174 int RowPainter::leftMargin() const
 175 {
 176         return text_.leftMargin(pit_, row_);
 177 }
 178
 179
 180 void RowPainter::paintInset(pos_type const pos)
 181 {
 182         InsetOld * inset = const_cast<InsetOld*>(pit_->getInset(pos));
 183
 184         BOOST_ASSERT(inset);
 185
 186         PainterInfo pi(perv(bv_));
 187         pi.base.font = getFont(pos);
 188         inset->draw(pi, int(x_), yo_ + row_.baseline());
 189         x_ += inset->width();
 190 }
 191
 192
 193 void RowPainter::paintHebrewComposeChar(pos_type & vpos)
 194 {
 195         pos_type pos = text_.bidi.vis2log(vpos);
 196
 197         string str;
 198
 199         // first char
 200         char c = pit_->getChar(pos);
 201         str += c;
 202         ++vpos;
 203
 204         LyXFont const & font = getFont(pos);
 205         int const width = font_metrics::width(c, font);
 206         int dx = 0;
 207
 208         for (pos_type i = pos - 1; i >= 0; --i) {
 209                 c = pit_->getChar(i);
 210                 if (!Encodings::IsComposeChar_hebrew(c)) {
 211                         if (IsPrintableNonspace(c)) {
 212                                 int const width2 = singleWidth(i, c);
 213                                 // dalet / resh
 214                                 dx = (c == 'ø' || c == 'ã')
 215                                         ? width2 - width
 216                                         : (width2 - width) / 2;
 217                         }
 218                         break;
 219                 }
 220         }
 221
 222         // Draw nikud
 223         pain_.text(int(x_) + dx, yo_ + row_.baseline(), str, font);
 224 }
 225
 226
 227 void RowPainter::paintArabicComposeChar(pos_type & vpos)
 228 {
 229         pos_type pos = text_.bidi.vis2log(vpos);
 230         string str;
 231
 232         // first char
 233         char c = pit_->getChar(pos);
 234         c = transformChar(c, pos);
 235         str +=c;
 236         ++vpos;
 237
 238         LyXFont const & font = getFont(pos);
 239         int const width = font_metrics::width(c, font);
 240         int dx = 0;
 241
 242         for (pos_type i = pos - 1; i >= 0; --i) {
 243                 c = pit_->getChar(i);
 244                 if (!Encodings::IsComposeChar_arabic(c)) {
 245                         if (IsPrintableNonspace(c)) {
 246                                 int const width2 = singleWidth(i, c);
 247                                 dx = (width2 - width) / 2;
 248                         }
 249                         break;
 250                 }
 251         }
 252         // Draw nikud
 253         pain_.text(int(x_) + dx, yo_ + row_.baseline(), str, font);
 254 }
 255
 256
 257 void RowPainter::paintChars(pos_type & vpos, bool hebrew, bool arabic)
 258 {
 259         pos_type pos = text_.bidi.vis2log(vpos);
 260         pos_type const end = row_.endpos();
 261         LyXFont orig_font = getFont(pos);
 262
 263         // first character
 264         string str;
 265         str += pit_->getChar(pos);
 266         if (arabic) {
 267                 unsigned char c = str[0];
 268                 str[0] = transformChar(c, pos);
 269         }
 270
 271         bool prev_struckout = isDeletedText(*pit_, pos);
 272         bool prev_newtext = isInsertedText(*pit_, pos);
 273
 274         ++vpos;
 275
 276         // collect as much similar chars as we can
 277         while (vpos < end && (pos = text_.bidi.vis2log(vpos)) >= 0) {
 278                 char c = pit_->getChar(pos);
 279
 280                 if (!IsPrintableNonspace(c))
 281                         break;
 282
 283                 if (prev_struckout != isDeletedText(*pit_, pos))
 284                         break;
 285
 286                 if (prev_newtext != isInsertedText(*pit_, pos))
 287                         break;
 288
 289                 if (arabic && Encodings::IsComposeChar_arabic(c))
 290                         break;
 291
 292                 if (hebrew && Encodings::IsComposeChar_hebrew(c))
 293                         break;
 294
 295                 if (orig_font != getFont(pos))
 296                         break;
 297
 298                 if (arabic)
 299                         c = transformChar(c, pos);
 300                 str += c;
 301                 ++vpos;
 302         }
 303
 304         if (prev_struckout) {
 305                 orig_font.setColor(LColor::strikeout);
 306         } else if (prev_newtext) {
 307                 orig_font.setColor(LColor::newtext);
 308         }
 309
 310         // Draw text and set the new x position
 311         //lyxerr << "paint row: yo_ " << yo_ << " baseline: " << row_.baseline()
 312         //      << "\n";
 313         pain_.text(int(x_), yo_ + row_.baseline(), str, orig_font);
 314         x_ += font_metrics::width(str, orig_font);
 315 }
 316
 317
 318 void RowPainter::paintForeignMark(double orig_x, LyXFont const & orig_font)
 319 {
 320         if (!lyxrc.mark_foreign_language)
 321                 return;
 322         if (orig_font.language() == latex_language)
 323                 return;
 324         if (orig_font.language() == bv_.buffer()->params().language)
 325                 return;
 326
 327         int const y = yo_ + row_.baseline() + 1;
 328         pain_.line(int(orig_x), y, int(x_), y, LColor::language);
 329 }
 330
 331
 332 void RowPainter::paintFromPos(pos_type & vpos)
 333 {
 334         pos_type const pos = text_.bidi.vis2log(vpos);
 335
 336         LyXFont const & orig_font = getFont(pos);
 337
 338         double const orig_x = x_;
 339
 340         char const c = pit_->getChar(pos);
 341
 342         if (c == Paragraph::META_INSET) {
 343                 paintInset(pos);
 344                 ++vpos;
 345                 paintForeignMark(orig_x, orig_font);
 346                 return;
 347         }
 348
 349         // usual characters, no insets
 350
 351         // special case languages
 352         bool const hebrew = (orig_font.language()->lang() == "hebrew");
 353         bool const arabic =
 354                 orig_font.language()->lang() == "arabic" &&
 355                 (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 356                 lyxrc.font_norm_type == LyXRC::ISO_10646_1);
 357
 358         // draw as many chars as we can
 359         if ((!hebrew && !arabic)
 360                 || (hebrew && !Encodings::IsComposeChar_hebrew(c))
 361                 || (arabic && !Encodings::IsComposeChar_arabic(c))) {
 362                 paintChars(vpos, hebrew, arabic);
 363         } else if (hebrew) {
 364                 paintHebrewComposeChar(vpos);
 365         } else if (arabic) {
 366                 paintArabicComposeChar(vpos);
 367         }
 368
 369         paintForeignMark(orig_x, orig_font);
 370
 371         return;
 372 }
 373
 374
 375 void RowPainter::paintBackground()
 376 {
 377         int const x = int(xo_);
 378         int const y = yo_ < 0 ? 0 : yo_;
 379         int const h = yo_ < 0 ? row_.height() + yo_ : row_.height();
 380         pain_.fillRectangle(x, y, width_, h, text_.backgroundColor());
 381 }
 382
 383
 384 void RowPainter::paintSelection()
 385 {
 386         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params());
 387
 388         // the current selection
 389         int const startx = text_.selection.start.x();
 390         int const endx = text_.selection.end.x();
 391         int const starty = text_.selection.start.y();
 392         int const endy = text_.selection.end.y();
 393         ParagraphList::iterator startpit = text_.getPar(text_.selection.start);
 394         ParagraphList::iterator endpit = text_.getPar(text_.selection.end);
 395         RowList::iterator startrow = startpit->getRow(text_.selection.start.pos());
 396         RowList::iterator endrow = endpit->getRow(text_.selection.end.pos());
 397
 398         if (text_.bidi.same_direction()) {
 399                 int x;
 400                 int y = yo_;
 401                 int w;
 402                 int h = row_.height();
 403
 404                 if (startrow == rit_ && endrow == rit_) {
 405                         if (startx < endx) {
 406                                 x = int(xo_) + startx;
 407                                 w = endx - startx;
 408                                 pain_.fillRectangle(x, y, w, h, LColor::selection);
 409                         } else {
 410                                 x = int(xo_) + endx;
 411                                 w = startx - endx;
 412                                 pain_.fillRectangle(x, y, w, h, LColor::selection);
 413                         }
 414                 } else if (startrow == rit_) {
 415                         int const x = is_rtl ? int(xo_) : int(xo_ + startx);
 416                         int const w = is_rtl ? startx : (width_ - startx);
 417                         pain_.fillRectangle(x, y, w, h, LColor::selection);
 418                 } else if (endrow == rit_) {
 419                         int const x = is_rtl ? int(xo_ + endx) : int(xo_);
 420                         int const w = is_rtl ? (width_ - endx) : endx;
 421                         pain_.fillRectangle(x, y, w, h, LColor::selection);
 422                 } else if (y_ > starty && y_ < endy) {
 423                         pain_.fillRectangle(int(xo_), y, width_, h, LColor::selection);
 424                 }
 425                 return;
 426         } else if (startrow != rit_ && endrow != rit_) {
 427                 if (y_ > starty && y_ < endy) {
 428                         int w = width_;
 429                         int h = row_.height();
 430                         pain_.fillRectangle(int(xo_), yo_, w, h, LColor::selection);
 431                 }
 432                 return;
 433         }
 434
 435         if ((startrow != rit_ && !is_rtl) || (endrow != rit_ && is_rtl))
 436                 pain_.fillRectangle(int(xo_), yo_,
 437                         int(x_), row_.height(), LColor::selection);
 438
 439         pos_type const body_pos = pit_->beginningOfBody();
 440         pos_type const end = row_.endpos();
 441         double tmpx = x_;
 442
 443         for (pos_type vpos = row_.pos(); vpos < end; ++vpos)  {
 444                 pos_type pos = text_.bidi.vis2log(vpos);
 445                 double const old_tmpx = tmpx;
 446                 if (body_pos > 0 && pos == body_pos - 1) {
 447                         LyXLayout_ptr const & layout = pit_->layout();
 448                         LyXFont const lfont = getLabelFont();
 449
 450                         tmpx += label_hfill_ + font_metrics::width(layout->labelsep, lfont);
 451
 452                         if (pit_->isLineSeparator(body_pos - 1))
 453                                 tmpx -= singleWidth(body_pos - 1);
 454                 }
 455
 456                 if (hfillExpansion(*pit_, row_, pos)) {
 457                         tmpx += singleWidth(pos);
 458                         if (pos >= body_pos)
 459                                 tmpx += hfill_;
 460                         else
 461                                 tmpx += label_hfill_;
 462                 }
 463
 464                 else if (pit_->isSeparator(pos)) {
 465                         tmpx += singleWidth(pos);
 466                         if (pos >= body_pos)
 467                                 tmpx += separator_;
 468                 } else {
 469                         tmpx += singleWidth(pos);
 470                 }
 471
 472                 if ((startrow != rit_ || text_.selection.start.pos() <= pos) &&
 473                         (endrow != rit_ || pos < text_.selection.end.pos())) {
 474                         // Here we do not use x_ as xo_ was added to x_.
 475                         pain_.fillRectangle(int(old_tmpx), yo_,
 476                                 int(tmpx - old_tmpx + 1),
 477                                 row_.height(), LColor::selection);
 478                 }
 479         }
 480
 481         if ((startrow != rit_ && is_rtl) || (endrow != rit_ && !is_rtl)) {
 482                 pain_.fillRectangle(int(xo_ + tmpx),
 483                                       yo_, int(bv_.workWidth() - tmpx),
 484                                       row_.height(), LColor::selection);
 485         }
 486 }
 487
 488
 489 void RowPainter::paintChangeBar()
 490 {
 491         pos_type const start = row_.pos();
 492         pos_type const end = row_.endpos();
 493
 494         if (start == end || !pit_->isChanged(start, end - 1))
 495                 return;
 496
 497         int const height = text_.isLastRow(pit_, row_)
 498                 ? row_.baseline()
 499                 : row_.height() + boost::next(rit_)->top_of_text();
 500
 501         pain_.fillRectangle(4, yo_, 5, height, LColor::changebar);
 502 }
 503
 504
 505 void RowPainter::paintAppendix()
 506 {
 507         if (!pit_->params().appendix())
 508                 return;
 509
 510         // FIXME: can be just width_ ?
 511         int const ww = bv_.workWidth();
 512
 513         int y = yo_;
 514
 515         if (pit_->params().startOfAppendix())
 516                 y += 2 * defaultRowHeight();
 517
 518         pain_.line(1, y, 1, yo_ + row_.height(), LColor::appendix);
 519         pain_.line(ww - 2, y, ww - 2, yo_ + row_.height(), LColor::appendix);
 520 }
 521
 522
 523 void RowPainter::paintDepthBar()
 524 {
 525         Paragraph::depth_type const depth = pit_->getDepth();
 526
 527         if (depth <= 0)
 528                 return;
 529
 530         Paragraph::depth_type prev_depth = 0;
 531         if (!text_.isFirstRow(pit_, row_)) {
 532                 ParagraphList::iterator pit2 = pit_;
 533                 if (row_.pos() == 0)
 534                         --pit2;
 535                 prev_depth = pit2->getDepth();
 536         }
 537
 538         Paragraph::depth_type next_depth = 0;
 539         if (!text_.isLastRow(pit_, row_)) {
 540                 ParagraphList::iterator pit2 = pit_;
 541                 if (row_.endpos() >= pit2->size())
 542                         ++pit2;
 543                 next_depth = pit2->getDepth();
 544         }
 545
 546         for (Paragraph::depth_type i = 1; i <= depth; ++i) {
 547                 int const w = PAPER_MARGIN / 5;
 548                 int x = int(w * i + xo_);
 549                 // only consider the changebar space if we're drawing outer left
 550                 if (!xo_)
 551                         x += CHANGEBAR_MARGIN;
 552                 int const h = yo_ + row_.height() - 1 - (i - next_depth - 1) * 3;
 553
 554                 pain_.line(x, yo_, x, h, LColor::depthbar);
 555
 556                 if (i > prev_depth)
 557                         pain_.fillRectangle(x, yo_, w, 2, LColor::depthbar);
 558                 if (i > next_depth)
 559                         pain_.fillRectangle(x, h, w, 2, LColor::depthbar);
 560         }
 561 }
 562
 563
 564 int RowPainter::paintLengthMarker(string const & prefix, VSpace const & vsp, int start)
 565 {
 566         if (vsp.kind() == VSpace::NONE)
 567                 return 0;
 568
 569         int const arrow_size = 4;
 570         int const size = getLengthMarkerHeight(bv_, vsp);
 571         int const end = start + size;
 572
 573         // the label to display (if any)
 574         string str;
 575         // y-values for top arrow
 576         int ty1, ty2;
 577         // y-values for bottom arrow
 578         int by1, by2;
 579
 580         str = prefix + " (" + vsp.asLyXCommand() + ")";
 581
 582         if (vsp.kind() == VSpace::VFILL) {
 583                 ty1 = ty2 = start;
 584                 by1 = by2 = end;
 585         } else {
 586                 // adding or removing space
 587                 bool const added = vsp.kind() != VSpace::LENGTH ||
 588                                    vsp.length().len().value() > 0.0;
 589                 ty1 = added ? (start + arrow_size) : start;
 590                 ty2 = added ? start : (start + arrow_size);
 591                 by1 = added ? (end - arrow_size) : end;
 592                 by2 = added ? end : (end - arrow_size);
 593         }
 594
 595         int const leftx = int(xo_) + leftMargin();
 596         int const midx = leftx + arrow_size;
 597         int const rightx = midx + arrow_size;
 598
 599         // first the string
 600         int w = 0;
 601         int a = 0;
 602         int d = 0;
 603
 604         LyXFont font;
 605         font.setColor(LColor::added_space);
 606         font.decSize();
 607         font.decSize();
 608         font_metrics::rectText(str, font, w, a, d);
 609
 610         pain_.rectText(leftx + 2 * arrow_size + 5,
 611                        start + ((end - start) / 2) + d,
 612                        str, font,
 613                        LColor::none, LColor::none);
 614
 615         // top arrow
 616         pain_.line(leftx, ty1, midx, ty2, LColor::added_space);
 617         pain_.line(midx, ty2, rightx, ty1, LColor::added_space);
 618
 619         // bottom arrow
 620         pain_.line(leftx, by1, midx, by2, LColor::added_space);
 621         pain_.line(midx, by2, rightx, by1, LColor::added_space);
 622
 623         // joining line
 624         pain_.line(midx, ty2, midx, by2, LColor::added_space);
 625
 626         return size;
 627 }
 628
 629
 630 int RowPainter::paintPageBreak(string const & label, int y)
 631 {
 632         LyXFont pb_font;
 633         pb_font.setColor(LColor::pagebreak);
 634         pb_font.decSize();
 635
 636         int w = 0;
 637         int a = 0;
 638         int d = 0;
 639         font_metrics::rectText(label, pb_font, w, a, d);
 640
 641         int const text_start = int(xo_ + (width_ - w) / 2);
 642         int const text_end = text_start + w;
 643
 644         pain_.rectText(text_start, y + d, label, pb_font, LColor::none, LColor::none);
 645
 646         pain_.line(int(xo_), y, text_start, y,
 647                    LColor::pagebreak, Painter::line_onoffdash);
 648         pain_.line(text_end, y, int(xo_ + width_), y,
 649                    LColor::pagebreak, Painter::line_onoffdash);
 650
 651         return 3 * defaultRowHeight();
 652 }
 653
 654
 655 int RowPainter::paintAppendixStart(int y)
 656 {
 657         LyXFont pb_font;
 658         pb_font.setColor(LColor::appendix);
 659         pb_font.decSize();
 660
 661         string const label = _("Appendix");
 662         int w = 0;
 663         int a = 0;
 664         int d = 0;
 665         font_metrics::rectText(label, pb_font, w, a, d);
 666
 667         int const text_start = int(xo_ + (width_ - w) / 2);
 668         int const text_end = text_start + w;
 669
 670         pain_.rectText(text_start, y + d, label, pb_font, LColor::none, LColor::none);
 671
 672         pain_.line(int(xo_ + 1), y, text_start, y, LColor::appendix);
 673         pain_.line(text_end, y, int(xo_ + width_ - 2), y, LColor::appendix);
 674
 675         return 3 * defaultRowHeight();
 676 }
 677
 678
 679 void RowPainter::paintFirst()
 680 {
 681         ParagraphParameters const & parparams = pit_->params();
 682
 683         int y_top = 0;
 684
 685         // start of appendix?
 686         if (parparams.startOfAppendix())
 687                 y_top += paintAppendixStart(yo_ + y_top + 2 * defaultRowHeight());
 688
 689         // the top margin
 690         if (text_.isFirstRow(pit_, row_) && !text_.isInInset())
 691                 y_top += PAPER_MARGIN;
 692
 693         // draw a top pagebreak
 694         if (parparams.pagebreakTop())
 695                 y_top += paintPageBreak(_("Page Break (top)"),
 696                         yo_ + y_top + 2 * defaultRowHeight());
 697
 698         // draw the additional space if needed:
 699         y_top += paintLengthMarker(_("Space above"), parparams.spaceTop(),
 700                         yo_ + y_top);
 701
 702         Buffer const & buffer = *bv_.buffer();
 703
 704         LyXLayout_ptr const & layout = pit_->layout();
 705
 706         if (buffer.params().paragraph_separation == BufferParams::PARSEP_SKIP) {
 707                 if (pit_ != text_.ownerParagraphs().begin()) {
 708                         if (layout->latextype == LATEX_PARAGRAPH
 709                                 && !pit_->getDepth()) {
 710                                 y_top += buffer.params().getDefSkip().inPixels(bv_);
 711                         } else {
 712                                 LyXLayout_ptr const & playout =
 713                                         boost::prior(pit_)->layout();
 714                                 if (playout->latextype == LATEX_PARAGRAPH
 715                                         && !boost::prior(pit_)->getDepth()) {
 716                                         // is it right to use defskip here, too? (AS)
 717                                         y_top += buffer.params().getDefSkip().inPixels(bv_);
 718                                 }
 719                         }
 720                 }
 721         }
 722
 723         int const ww = bv_.workWidth();
 724
 725         // draw a top line
 726         if (parparams.lineTop()) {
 727                 int const asc = font_metrics::ascent('x', getFont(0));
 728
 729                 y_top += asc;
 730
 731                 int const w = (text_.isInInset() ? text_.inset_owner->width() : ww);
 732                 int const xp = static_cast<int>(text_.isInInset() ? xo_ : 0);
 733                 pain_.line(xp, yo_ + y_top, xp + w, yo_ + y_top,
 734                         LColor::topline, Painter::line_solid,
 735                         Painter::line_thick);
 736
 737                 y_top += asc;
 738         }
 739
 740         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params());
 741         bool const is_seq = isFirstInSequence(pit_, text_.ownerParagraphs());
 742         //lyxerr << "paintFirst: " << pit_->id() << " is_seq: " << is_seq << std::endl;
 743
 744         // should we print a label?
 745         if (layout->labeltype >= LABEL_STATIC
 746             && (layout->labeltype != LABEL_STATIC
 747                       || layout->latextype != LATEX_ENVIRONMENT
 748                       || is_seq)) {
 749
 750                 LyXFont font = getLabelFont();
 751                 if (!pit_->getLabelstring().empty()) {
 752                         double x = x_;
 753                         string const str = pit_->getLabelstring();
 754
 755                         // this is special code for the chapter layout. This is
 756                         // printed in an extra row and has a pagebreak at
 757                         // the top.
 758                         if (layout->counter == "chapter") {
 759                                 if (buffer.params().secnumdepth >= 0) {
 760                                         float spacing_val = 1.0;
 761                                         if (!parparams.spacing().isDefault()) {
 762                                                 spacing_val = parparams.spacing().getValue();
 763                                         } else {
 764                                                 spacing_val = buffer.params().spacing().getValue();
 765                                         }
 766
 767                                         int const maxdesc =
 768                                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val)
 769                                                 + int(layout->parsep) * defaultRowHeight();
 770
 771                                         if (is_rtl) {
 772                                                 x = ww - leftMargin() -
 773                                                         font_metrics::width(str, font);
 774                                         }
 775
 776                                         pain_.text(int(x),
 777                                                 yo_ + row_.baseline() -
 778                                                 row_.ascent_of_text() - maxdesc,
 779                                                 str, font);
 780                                 }
 781                         } else {
 782                                 if (is_rtl) {
 783                                         x = ww - leftMargin()
 784                                                 + font_metrics::width(layout->labelsep, font);
 785                                 } else {
 786                                         x = x_ - font_metrics::width(layout->labelsep, font)
 787                                                 - font_metrics::width(str, font);
 788                                 }
 789
 790                                 pain_.text(int(x), yo_ + row_.baseline(), str, font);
 791                         }
 792                 }
 793
 794         // the labels at the top of an environment.
 795         // More or less for bibliography
 796         } else if (is_seq &&
 797                 (layout->labeltype == LABEL_TOP_ENVIRONMENT ||
 798                 layout->labeltype == LABEL_BIBLIO ||
 799                 layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 800                 LyXFont font = getLabelFont();
 801                 if (!pit_->getLabelstring().empty()) {
 802                         string const str = pit_->getLabelstring();
 803                         float spacing_val = 1.0;
 804                         if (!parparams.spacing().isDefault()) {
 805                                 spacing_val = parparams.spacing().getValue();
 806                         } else {
 807                                 spacing_val = buffer.params().spacing().getValue();
 808                         }
 809
 810                         int maxdesc =
 811                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val
 812                                 + (layout->labelbottomsep * defaultRowHeight()));
 813
 814                         double x = x_;
 815                         if (layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 816                                 x = ((is_rtl ? leftMargin() : x_)
 817                                          + ww - text_.rightMargin(*pit_, *bv_.buffer(), row_)) / 2;
 818                                 x -= font_metrics::width(str, font) / 2;
 819                         } else if (is_rtl) {
 820                                 x = ww - leftMargin() -
 821                                         font_metrics::width(str, font);
 822                         }
 823                         pain_.text(int(x),
 824                             yo_ + row_.baseline() - row_.ascent_of_text() - maxdesc,
 825                                   str, font);
 826                 }
 827         }
 828 }
 829
 830
 831 void RowPainter::paintLast()
 832 {
 833         ParagraphParameters const & parparams = pit_->params();
 834         int y_bottom = row_.height() - 1;
 835
 836         // the bottom margin
 837         if (text_.isLastRow(pit_, row_) && !text_.isInInset())
 838                 y_bottom -= PAPER_MARGIN;
 839
 840         int const ww = bv_.workWidth();
 841
 842         // draw a bottom pagebreak
 843         if (parparams.pagebreakBottom()) {
 844                 y_bottom -= paintPageBreak(_("Page Break (bottom)"),
 845                         yo_ + y_bottom - 2 * defaultRowHeight());
 846         }
 847
 848         // draw the additional space if needed:
 849         int const height = getLengthMarkerHeight(bv_, parparams.spaceBottom());
 850         y_bottom -= paintLengthMarker(_("Space below"), parparams.spaceBottom(),
 851                              yo_ + y_bottom - height);
 852
 853         // draw a bottom line
 854         if (parparams.lineBottom()) {
 855                 int const asc = font_metrics::ascent('x',
 856                         getFont(max(pos_type(0), pit_->size() - 1)));
 857
 858                 y_bottom -= asc;
 859
 860                 int const w = text_.isInInset() ? text_.inset_owner->width() : ww;
 861                 int const xp = int(text_.isInInset() ? xo_ : 0);
 862                 int const y = yo_ + y_bottom;
 863                 pain_.line(xp, y, xp + w, y, LColor::topline, Painter::line_solid,
 864                           Painter::line_thick);
 865
 866                 y_bottom -= asc;
 867         }
 868
 869         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params());
 870         int const endlabel = getEndLabel(pit_, text_.ownerParagraphs());
 871
 872         // draw an endlabel
 873         switch (endlabel) {
 874         case END_LABEL_BOX:
 875         case END_LABEL_FILLED_BOX:
 876         {
 877                 LyXFont const font = getLabelFont();
 878                 int const size = int(0.75 * font_metrics::maxAscent(font));
 879                 int const y = (yo_ + row_.baseline()) - size;
 880                 int x = is_rtl ? LEFT_MARGIN : ww - PAPER_MARGIN - size;
 881
 882                 if (row_.fill() <= size)
 883                         x += (size - row_.fill() + 1) * (is_rtl ? -1 : 1);
 884
 885                 if (endlabel == END_LABEL_BOX)
 886                         pain_.rectangle(x, y, size, size, LColor::eolmarker);
 887                 else
 888                         pain_.fillRectangle(x, y, size, size, LColor::eolmarker);
 889                 break;
 890         }
 891         case END_LABEL_STATIC:
 892         {
 893                 LyXFont font = getLabelFont();
 894                 string const & str = pit_->layout()->endlabelstring();
 895                 double const x = is_rtl ?
 896                         x_ - font_metrics::width(str, font)
 897                         : ww - text_.rightMargin(*pit_, *bv_.buffer(), row_) - row_.fill();
 898                 pain_.text(int(x), yo_ + row_.baseline(), str, font);
 899                 break;
 900         }
 901         case END_LABEL_NO_LABEL:
 902                 break;
 903         }
 904 }
 905
 906
 907 void RowPainter::paintText()
 908 {
 909         pos_type const end = row_.endpos();
 910         pos_type body_pos = pit_->beginningOfBody();
 911         if (body_pos > 0 &&
 912                 (body_pos > end || !pit_->isLineSeparator(body_pos - 1))) {
 913                 body_pos = 0;
 914         }
 915
 916         LyXLayout_ptr const & layout = pit_->layout();
 917
 918         bool running_strikeout = false;
 919         bool is_struckout = false;
 920         int last_strikeout_x = 0;
 921
 922         pos_type vpos = row_.pos();
 923         while (vpos < end) {
 924                 if (x_ > bv_.workWidth())
 925                         break;
 926                 pos_type pos = text_.bidi.vis2log(vpos);
 927
 928                 if (pos >= pit_->size()) {
 929                         ++vpos;
 930                         continue;
 931                 }
 932
 933                 if (x_ + singleWidth(pos) < 0) {
 934                         x_ += singleWidth(pos);
 935                         ++vpos;
 936                         continue;
 937                 }
 938
 939                 is_struckout = isDeletedText(*pit_, pos);
 940
 941                 if (is_struckout && !running_strikeout) {
 942                         running_strikeout = true;
 943                         last_strikeout_x = int(x_);
 944                 }
 945
 946                 bool const highly_editable_inset = pit_->isInset(pos)
 947                         && isHighlyEditableInset(pit_->getInset(pos));
 948
 949                 // if we reach the end of a struck out range, paint it
 950                 // we also don't paint across things like tables
 951                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 952                         int const middle = yo_ + row_.top_of_text()
 953                                 + (row_.baseline() - row_.top_of_text()) / 2;
 954                         pain_.line(last_strikeout_x, middle, int(x_), middle,
 955                                 LColor::strikeout, Painter::line_solid, Painter::line_thin);
 956                         running_strikeout = false;
 957                 }
 958
 959                 if (body_pos > 0 && pos == body_pos - 1) {
 960                         int const lwidth = font_metrics::width(layout->labelsep,
 961                                 getLabelFont());
 962
 963                         x_ += label_hfill_ + lwidth - singleWidth(body_pos - 1);
 964                 }
 965
 966                 if (pit_->isHfill(pos)) {
 967                         x_ += 1;
 968
 969                         int const y0 = yo_ + row_.baseline();
 970                         int const y1 = y0 - defaultRowHeight() / 2;
 971
 972                         pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 973
 974                         if (hfillExpansion(*pit_, row_, pos)) {
 975                                 int const y2 = (y0 + y1) / 2;
 976
 977                                 if (pos >= body_pos) {
 978                                         pain_.line(int(x_), y2, int(x_ + hfill_), y2,
 979                                                   LColor::added_space,
 980                                                   Painter::line_onoffdash);
 981                                         x_ += hfill_;
 982                                 } else {
 983                                         pain_.line(int(x_), y2, int(x_ + label_hfill_), y2,
 984                                                   LColor::added_space,
 985                                                   Painter::line_onoffdash);
 986                                         x_ += label_hfill_;
 987                                 }
 988                                 pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 989                         }
 990                         x_ += 2;
 991                         ++vpos;
 992                 } else if (pit_->isSeparator(pos)) {
 993                         x_ += singleWidth(pos);
 994                         if (pos >= body_pos)
 995                                 x_ += separator_;
 996                         ++vpos;
 997                 } else {
 998                         paintFromPos(vpos);
 999                 }
1000         }
1001
1002         // if we reach the end of a struck out range, paint it
1003         if (running_strikeout) {
1004                 int const middle = yo_ + row_.top_of_text()
1005                         + ((row_.baseline() - row_.top_of_text()) / 2);
1006                 pain_.line(last_strikeout_x, middle, int(x_), middle,
1007                         LColor::strikeout, Painter::line_solid, Painter::line_thin);
1008                 running_strikeout = false;
1009         }
1010 }
1011
1012
1013 void RowPainter::paint()
1014 {
1015         width_       = text_.workWidth();
1016         x_           = row_.x();
1017         separator_   = row_.fill_separator();
1018         hfill_       = row_.fill_hfill();
1019         label_hfill_ = row_.fill_label_hfill();
1020
1021         // FIXME: what is this fixing ?
1022         if (text_.isInInset() && x_ < 0)
1023                 x_ = 0;
1024         x_ += xo_;
1025
1026         // If we're *not* at the top-level of rows, then the
1027         // background has already been cleared.
1028         if (&text_ == bv_.text)
1029                 paintBackground();
1030
1031         // paint the selection background
1032         if (text_.selection.set())
1033                 paintSelection();
1034
1035         // vertical lines for appendix
1036         paintAppendix();
1037
1038         // environment depth brackets
1039         paintDepthBar();
1040
1041         // changebar
1042         paintChangeBar();
1043
1044         if (row_.pos() == 0)
1045                 paintFirst();
1046
1047         if (row_.endpos() >= pit_->size())
1048                 paintLast();
1049
1050         // paint text
1051         paintText();
1052 }
1053
1054
1055 int paintRows(BufferView const & bv, LyXText const & text,
1056         ParagraphList::iterator pit, RowList::iterator rit,
1057         int xo, int y, int yf, int yo)
1058 {
1059         //lyxerr << "  paintRows: rit: " << &*rit << endl;
1060         int const yy = yf - y;
1061         int const y2 = bv.painter().paperHeight();
1062
1063         ParagraphList::iterator end = text.ownerParagraphs().end();
1064         bool active = false;
1065
1066         for ( ; pit != end; ++pit) {
1067                 RowList::iterator row = pit->rows.begin();
1068                 RowList::iterator rend = pit->rows.end();
1069
1070                 for ( ; row != rend; ++row) {
1071                         if (row == rit)
1072                                 active = true;
1073                         if (active) {
1074                                 RowPainter painter(bv, text, pit, row, y + yo, xo, y + bv.top_y());
1075                                 painter.paint();
1076                                 y += row->height();
1077                                 if (yy + y >= y2)
1078                                         return y;
1079                         } else {
1080                                 //lyxerr << "   paintRows: row: " << &*row << " ignored" << endl;
1081                         }
1082                 }
1083         }
1084
1085         return y;
1086 }
1087
1088 } // namespace anon
1089
1090
1091 int paintText(BufferView & bv)
1092 {
1093         int const topy = bv.top_y();
1094         ParagraphList::iterator pit;
1095         RowList::iterator rit = bv.text->getRowNearY(topy, pit);
1096         int const y = pit->y + rit->y_offset() - topy;
1097         return paintRows(bv, *bv.text, pit, rit, 0, y, y, 0);
1098 }
1099
1100
1101 void paintTextInset(BufferView & bv, LyXText & text, int x, int baseline)
1102 {
1103         RowList::iterator rit = text.firstRow();
1104         RowList::iterator end = text.endRow();
1105         ParagraphList::iterator pit = text.ownerParagraphs().begin();
1106
1107         int y_offset = baseline - rit->ascent_of_text();
1108         int y = y_offset;
1109         while (rit != end && y + rit->height() <= 0) {
1110                 y += rit->height();
1111                 text.nextRow(pit, rit);
1112         }
1113         if (y_offset < 0)
1114                 paintRows(bv, text, pit, rit, x, 0, y, y);
1115         else
1116                 paintRows(bv, text, pit, rit, x, 0, y_offset, y_offset);
1117 }
1118
1119
1120 int getLengthMarkerHeight(BufferView const & bv, VSpace const & vsp)
1121 {
1122         if (vsp.kind() == VSpace::NONE)
1123                 return 0;
1124
1125         int const arrow_size = 4;
1126         int const space_size = vsp.inPixels(bv);
1127
1128         LyXFont font;
1129         font.decSize();
1130         int const min_size = max(3 * arrow_size,
1131                 font_metrics::maxAscent(font)
1132                 + font_metrics::maxDescent(font));
1133
1134         if (vsp.length().len().value() < 0.0)
1135                 return min_size;
1136         else
1137                 return max(min_size, space_size);
1138 }