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 "frontends/Painter.h"
  15 #include "frontends/screen.h"
  16 #include "frontends/font_metrics.h"
  17 #include "support/LAssert.h"
  18 #include "paragraph.h"
  19 #include "paragraph_funcs.h"
  20 #include "support/textutils.h"
  21
  22 #include "insets/insettext.h"
  23 #include "ParagraphParameters.h"
  24 #include "debug.h"
  25 #include "BufferView.h"
  26 #include "buffer.h"
  27 #include "gettext.h"
  28 #include "language.h"
  29 #include "encoding.h"
  30 #include "lyxtext.h"
  31 #include "rowpainter.h"
  32 #include "lyxrc.h"
  33 #include "lyxrow_funcs.h"
  34 #include "metricsinfo.h"
  35
  36 #include <algorithm>
  37
  38 using namespace lyx::support;
  39
  40 using std::max;
  41 using std::endl;
  42 using lyx::pos_type;
  43
  44 extern int PAPER_MARGIN;
  45 extern int CHANGEBAR_MARGIN;
  46 extern int LEFT_MARGIN;
  47
  48 namespace {
  49
  50 // "temporary". We'll never get to use more
  51 // references until we start adding hacks like
  52 // these until other places catch up.
  53 BufferView * perv(BufferView const & bv)
  54 {
  55         return const_cast<BufferView *>(&bv);
  56 }
  57
  58 /**
  59  * A class used for painting an individual row of text.
  60  */
  61 class RowPainter {
  62 public:
  63         /// initialise painter
  64         RowPainter(BufferView const & bv, LyXText const & text,
  65                 ParagraphList::iterator pit,
  66                 RowList::iterator rit, int y_offset, int x_offset, int y);
  67
  68         /// do the painting
  69         void paint();
  70 private:
  71         // paint various parts
  72         void paintBackground();
  73         void paintSelection();
  74         void paintAppendix();
  75         void paintDepthBar();
  76         void paintChangeBar();
  77         void paintFirst();
  78         void paintLast();
  79         void paintForeignMark(double orig_x, LyXFont const & orig_font);
  80         void paintHebrewComposeChar(lyx::pos_type & vpos);
  81         void paintArabicComposeChar(lyx::pos_type & vpos);
  82         void paintChars(lyx::pos_type & vpos, bool hebrew, bool arabic);
  83         int paintPageBreak(string const & label, int y);
  84         int paintAppendixStart(int y);
  85         int paintLengthMarker(string const & prefix, VSpace const & vsp, int start);
  86         void paintText();
  87         void paintFromPos(lyx::pos_type & vpos);
  88         void paintInset(lyx::pos_type const pos);
  89
  90         /// return left margin
  91         int leftMargin() const;
  92
  93         /// return the font at the given pos
  94         LyXFont const getFont(lyx::pos_type pos) const;
  95
  96         /// return the label font for this row
  97         LyXFont const getLabelFont() const;
  98
  99         char const transformChar(char c, lyx::pos_type pos) const;
 100
 101         /// return pixel width for the given pos
 102         int singleWidth(lyx::pos_type pos) const;
 103         int singleWidth(lyx::pos_type pos, char c) const;
 104
 105         /// bufferview to paint on
 106         BufferView const & bv_;
 107
 108         /// Painter to use
 109         Painter & pain_;
 110
 111         /// LyXText for the row
 112         LyXText const & text_;
 113
 114         /// The row to paint
 115         RowList::iterator 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), row_(rit),
 136           pit_(pit), xo_(x_offset), yo_(y_offset), y_(y)
 137 {}
 138
 139
 140 /// "temporary"
 141 LyXFont const RowPainter::getFont(pos_type pos) const
 142 {
 143         return text_.getFont(pit_, pos);
 144 }
 145
 146
 147 int RowPainter::singleWidth(lyx::pos_type pos) const
 148 {
 149         return text_.singleWidth(pit_, pos);
 150 }
 151
 152
 153 int RowPainter::singleWidth(lyx::pos_type pos, char c) const
 154 {
 155         LyXFont const & font = text_.getFont(pit_, pos);
 156         return text_.singleWidth(pit_, pos, c, font);
 157 }
 158
 159
 160 LyXFont const RowPainter::getLabelFont() const
 161 {
 162         return text_.getLabelFont(pit_);
 163 }
 164
 165
 166 char const RowPainter::transformChar(char c, lyx::pos_type pos) const
 167 {
 168         return text_.transformChar(c, *pit_, pos);
 169 }
 170
 171
 172 int RowPainter::leftMargin() const
 173 {
 174         return text_.leftMargin(pit_, *row_);
 175 }
 176
 177
 178 void RowPainter::paintInset(pos_type const pos)
 179 {
 180         InsetOld * inset = const_cast<InsetOld*>(pit_->getInset(pos));
 181
 182         Assert(inset);
 183
 184         PainterInfo pi(perv(bv_));
 185         pi.base.font = getFont(pos);
 186         inset->draw(pi, int(x_), yo_ + row_->baseline());
 187         x_ += inset->width();
 188 }
 189
 190
 191 void RowPainter::paintHebrewComposeChar(pos_type & vpos)
 192 {
 193         pos_type pos = text_.vis2log(vpos);
 194
 195         string str;
 196
 197         // first char
 198         char c = pit_->getChar(pos);
 199         str += c;
 200         ++vpos;
 201
 202         LyXFont const & font = getFont(pos);
 203         int const width = font_metrics::width(c, font);
 204         int dx = 0;
 205
 206         for (pos_type i = pos - 1; i >= 0; --i) {
 207                 c = pit_->getChar(i);
 208                 if (!Encodings::IsComposeChar_hebrew(c)) {
 209                         if (IsPrintableNonspace(c)) {
 210                                 int const width2 =
 211                                         singleWidth(i, c);
 212                                 // dalet / resh
 213                                 dx = (c == 'ø' || c == 'ã')
 214                                         ? width2 - width
 215                                         : (width2 - width) / 2;
 216                         }
 217                         break;
 218                 }
 219         }
 220
 221         // Draw nikud
 222         pain_.text(int(x_) + dx, yo_ + row_->baseline(), str, font);
 223 }
 224
 225
 226 void RowPainter::paintArabicComposeChar(pos_type & vpos)
 227 {
 228         pos_type pos = text_.vis2log(vpos);
 229         string str;
 230
 231         // first char
 232         char c = pit_->getChar(pos);
 233         c = transformChar(c, pos);
 234         str +=c;
 235         ++vpos;
 236
 237         LyXFont const & font = getFont(pos);
 238         int const width = font_metrics::width(c, font);
 239         int dx = 0;
 240
 241         for (pos_type i = pos - 1; i >= 0; --i) {
 242                 c = pit_->getChar(i);
 243                 if (!Encodings::IsComposeChar_arabic(c)) {
 244                         if (IsPrintableNonspace(c)) {
 245                                 int const width2 =
 246                                         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_.vis2log(vpos);
 260         pos_type const last = lastPrintablePos(*pit_, row_);
 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 <= last && (pos = text_.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                 if (hebrew && Encodings::IsComposeChar_hebrew(c))
 292                         break;
 293
 294                 if (orig_font != getFont(pos))
 295                         break;
 296
 297                 if (arabic)
 298                         c = transformChar(c, pos);
 299                 str += c;
 300                 ++vpos;
 301         }
 302
 303         if (prev_struckout) {
 304                 orig_font.setColor(LColor::strikeout);
 305         } else if (prev_newtext) {
 306                 orig_font.setColor(LColor::newtext);
 307         }
 308
 309         // Draw text and set the new x position
 310         //lyxerr << "paint row: yo_ " << yo_ << " baseline: " << row_->baseline()
 311         //      << "\n";
 312         pain_.text(int(x_), yo_ + row_->baseline(), str, orig_font);
 313         x_ += font_metrics::width(str, orig_font);
 314 }
 315
 316
 317 void RowPainter::paintForeignMark(double orig_x, LyXFont const & orig_font)
 318 {
 319         if (!lyxrc.mark_foreign_language)
 320                 return;
 321         if (orig_font.language() == latex_language)
 322                 return;
 323         if (orig_font.language() == bv_.buffer()->params.language)
 324                 return;
 325
 326         int const y = yo_ + row_->baseline() + 1;
 327         pain_.line(int(orig_x), y, int(x_), y, LColor::language);
 328 }
 329
 330
 331 void RowPainter::paintFromPos(pos_type & vpos)
 332 {
 333         pos_type const pos = text_.vis2log(vpos);
 334
 335         LyXFont const & orig_font = getFont(pos);
 336
 337         double const orig_x = x_;
 338
 339         char const c = pit_->getChar(pos);
 340
 341         if (IsInsetChar(c)) {
 342                 paintInset(pos);
 343                 ++vpos;
 344                 paintForeignMark(orig_x, orig_font);
 345                 return;
 346         }
 347
 348         // usual characters, no insets
 349
 350         // special case languages
 351         bool const hebrew = (orig_font.language()->lang() == "hebrew");
 352         bool const arabic =
 353                 orig_font.language()->lang() == "arabic" &&
 354                 (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 355                 lyxrc.font_norm_type == LyXRC::ISO_10646_1);
 356
 357         // draw as many chars as we can
 358         if ((!hebrew && !arabic)
 359                 || (hebrew && !Encodings::IsComposeChar_hebrew(c))
 360                 || (arabic && !Encodings::IsComposeChar_arabic(c))) {
 361                 paintChars(vpos, hebrew, arabic);
 362         } else if (hebrew) {
 363                 paintHebrewComposeChar(vpos);
 364         } else if (arabic) {
 365                 paintArabicComposeChar(vpos);
 366         }
 367
 368         paintForeignMark(orig_x, orig_font);
 369
 370         return;
 371 }
 372
 373
 374 void RowPainter::paintBackground()
 375 {
 376         int const x = int(xo_);
 377         int const y = yo_ < 0 ? 0 : yo_;
 378         int const h = yo_ < 0 ? row_->height() + yo_ : row_->height();
 379         pain_.fillRectangle(x, y, width_, h, text_.backgroundColor());
 380 }
 381
 382
 383 void RowPainter::paintSelection()
 384 {
 385         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params);
 386
 387         // the current selection
 388         int const startx = text_.selection.start.x();
 389         int const endx = text_.selection.end.x();
 390         int const starty = text_.selection.start.y();
 391         int const endy = text_.selection.end.y();
 392         RowList::iterator startrow = text_.getRow(text_.selection.start);
 393         RowList::iterator endrow = text_.getRow(text_.selection.end);
 394
 395         if (text_.bidi_same_direction) {
 396                 int x;
 397                 int y = yo_;
 398                 int w;
 399                 int h = row_->height();
 400
 401                 if (startrow == row_ && endrow == row_) {
 402                         if (startx < endx) {
 403                                 x = int(xo_) + startx;
 404                                 w = endx - startx;
 405                                 pain_.fillRectangle(x, y, w, h, LColor::selection);
 406                         } else {
 407                                 x = int(xo_) + endx;
 408                                 w = startx - endx;
 409                                 pain_.fillRectangle(x, y, w, h, LColor::selection);
 410                         }
 411                 } else if (startrow == row_) {
 412                         int const x = is_rtl ? int(xo_) : int(xo_ + startx);
 413                         int const w = is_rtl ? startx : (width_ - startx);
 414                         pain_.fillRectangle(x, y, w, h, LColor::selection);
 415                 } else if (endrow == row_) {
 416                         int const x = is_rtl ? int(xo_ + endx) : int(xo_);
 417                         int const w = is_rtl ? (width_ - endx) : endx;
 418                         pain_.fillRectangle(x, y, w, h, LColor::selection);
 419                 } else if (y_ > starty && y_ < endy) {
 420                         pain_.fillRectangle(int(xo_), y, width_, h, LColor::selection);
 421                 }
 422                 return;
 423         } else if (startrow != row_ && endrow != row_) {
 424                 if (y_ > starty && y_ < endy) {
 425                         int w = width_;
 426                         int h = row_->height();
 427                         pain_.fillRectangle(int(xo_), yo_, w, h, LColor::selection);
 428                 }
 429                 return;
 430         }
 431
 432         if ((startrow != row_ && !is_rtl) || (endrow != row_ && is_rtl))
 433                 pain_.fillRectangle(int(xo_), yo_,
 434                         int(x_), row_->height(), LColor::selection);
 435
 436         pos_type const body_pos = pit_->beginningOfBody();
 437         pos_type const last = lastPrintablePos(*pit_, row_);
 438         double tmpx = x_;
 439
 440         for (pos_type vpos = row_->pos(); vpos <= last; ++vpos)  {
 441                 pos_type pos = text_.vis2log(vpos);
 442                 double const old_tmpx = tmpx;
 443                 if (body_pos > 0 && pos == body_pos - 1) {
 444                         LyXLayout_ptr const & layout = pit_->layout();
 445                         LyXFont const lfont = getLabelFont();
 446
 447                         tmpx += label_hfill_ + font_metrics::width(layout->labelsep, lfont);
 448
 449                         if (pit_->isLineSeparator(body_pos - 1))
 450                                 tmpx -= singleWidth(body_pos - 1);
 451                 }
 452
 453                 if (hfillExpansion(*pit_, row_, pos)) {
 454                         tmpx += singleWidth(pos);
 455                         if (pos >= body_pos)
 456                                 tmpx += hfill_;
 457                         else
 458                                 tmpx += label_hfill_;
 459                 }
 460
 461                 else if (pit_->isSeparator(pos)) {
 462                         tmpx += singleWidth(pos);
 463                         if (pos >= body_pos)
 464                                 tmpx += separator_;
 465                 } else {
 466                         tmpx += singleWidth(pos);
 467                 }
 468
 469                 if ((startrow != row_ || text_.selection.start.pos() <= pos) &&
 470                         (endrow != row_ || pos < text_.selection.end.pos())) {
 471                         // Here we do not use x_ as xo_ was added to x_.
 472                         pain_.fillRectangle(int(old_tmpx), yo_,
 473                                 int(tmpx - old_tmpx + 1),
 474                                 row_->height(), LColor::selection);
 475                 }
 476         }
 477
 478         if ((startrow != row_ && is_rtl) || (endrow != row_ && !is_rtl)) {
 479                 pain_.fillRectangle(int(xo_ + tmpx),
 480                                       yo_, int(bv_.workWidth() - tmpx),
 481                                       row_->height(), LColor::selection);
 482         }
 483 }
 484
 485
 486 void RowPainter::paintChangeBar()
 487 {
 488         pos_type const start = row_->pos();
 489         pos_type const end = lastPrintablePos(*pit_, row_);
 490
 491         if (!pit_->isChanged(start, end))
 492                 return;
 493
 494         int const height = (row_ == text_.lastRow())
 495                 ? row_->baseline()
 496                 : row_->height() + boost::next(row_)->top_of_text();
 497
 498         pain_.fillRectangle(4, yo_, 5, height, LColor::changebar);
 499 }
 500
 501
 502 void RowPainter::paintAppendix()
 503 {
 504         if (!pit_->params().appendix())
 505                 return;
 506
 507         // FIXME: can be just width_ ?
 508         int const ww = bv_.workWidth();
 509
 510         int y = yo_;
 511
 512         if (pit_->params().startOfAppendix())
 513                 y += 2 * defaultRowHeight();
 514
 515         pain_.line(1, y, 1, yo_ + row_->height(), LColor::appendix);
 516         pain_.line(ww - 2, y, ww - 2, yo_ + row_->height(), LColor::appendix);
 517 }
 518
 519
 520 void RowPainter::paintDepthBar()
 521 {
 522         Paragraph::depth_type const depth = pit_->getDepth();
 523
 524         if (depth <= 0)
 525                 return;
 526
 527         Paragraph::depth_type prev_depth = 0;
 528         if (row_ != text_.firstRow()) {
 529                 ParagraphList::iterator pit2 = pit_;
 530                 if (row_ == pit2->rows.begin())
 531                         --pit2;
 532                 prev_depth = pit2->getDepth();
 533         }
 534
 535         Paragraph::depth_type next_depth = 0;
 536         if (row_ != text_.lastRow()) {
 537                 ParagraphList::iterator pit2 = pit_;
 538                 if (boost::next(row_) == pit2->rows.end())
 539                         ++pit2;
 540                 next_depth = pit2->getDepth();
 541         }
 542
 543         for (Paragraph::depth_type i = 1; i <= depth; ++i) {
 544                 int const w = PAPER_MARGIN / 5;
 545                 int x = int(w * i + xo_);
 546                 // only consider the changebar space if we're drawing outer left
 547                 if (!xo_)
 548                         x += CHANGEBAR_MARGIN;
 549                 int const h = yo_ + row_->height() - 1 - (i - next_depth - 1) * 3;
 550
 551                 pain_.line(x, yo_, x, h, LColor::depthbar);
 552
 553                 if (i > prev_depth)
 554                         pain_.fillRectangle(x, yo_, w, 2, LColor::depthbar);
 555                 if (i > next_depth)
 556                         pain_.fillRectangle(x, h, w, 2, LColor::depthbar);
 557         }
 558 }
 559
 560
 561 int RowPainter::paintLengthMarker(string const & prefix, VSpace const & vsp, int start)
 562 {
 563         if (vsp.kind() == VSpace::NONE)
 564                 return 0;
 565
 566         int const arrow_size = 4;
 567         int const size = getLengthMarkerHeight(bv_, vsp);
 568         int const end = start + size;
 569
 570         // the label to display (if any)
 571         string str;
 572         // y-values for top arrow
 573         int ty1, ty2;
 574         // y-values for bottom arrow
 575         int by1, by2;
 576
 577         str = prefix + " (" + vsp.asLyXCommand() + ")";
 578
 579         if (vsp.kind() == VSpace::VFILL) {
 580                 ty1 = ty2 = start;
 581                 by1 = by2 = end;
 582         } else {
 583                 // adding or removing space
 584                 bool const added = vsp.kind() != VSpace::LENGTH ||
 585                                    vsp.length().len().value() > 0.0;
 586                 ty1 = added ? (start + arrow_size) : start;
 587                 ty2 = added ? start : (start + arrow_size);
 588                 by1 = added ? (end - arrow_size) : end;
 589                 by2 = added ? end : (end - arrow_size);
 590         }
 591
 592         int const leftx = int(xo_) + leftMargin();
 593         int const midx = leftx + arrow_size;
 594         int const rightx = midx + arrow_size;
 595
 596         // first the string
 597         int w = 0;
 598         int a = 0;
 599         int d = 0;
 600
 601         LyXFont font;
 602         font.setColor(LColor::added_space).decSize().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
 609         // top arrow
 610         pain_.line(leftx, ty1, midx, ty2, LColor::added_space);
 611         pain_.line(midx, ty2, rightx, ty1, LColor::added_space);
 612
 613         // bottom arrow
 614         pain_.line(leftx, by1, midx, by2, LColor::added_space);
 615         pain_.line(midx, by2, rightx, by1, LColor::added_space);
 616
 617         // joining line
 618         pain_.line(midx, ty2, midx, by2, LColor::added_space);
 619
 620         return size;
 621 }
 622
 623
 624 int RowPainter::paintPageBreak(string const & label, int y)
 625 {
 626         LyXFont pb_font;
 627         pb_font.setColor(LColor::pagebreak).decSize();
 628
 629         int w = 0;
 630         int a = 0;
 631         int d = 0;
 632         font_metrics::rectText(label, pb_font, w, a, d);
 633
 634         int const text_start = int(xo_ + (width_ - w) / 2);
 635         int const text_end = text_start + w;
 636
 637         pain_.rectText(text_start, y + d, label, pb_font);
 638
 639         pain_.line(int(xo_), y, text_start, y,
 640                 LColor::pagebreak, Painter::line_onoffdash);
 641         pain_.line(text_end, y, int(xo_ + width_), y,
 642                 LColor::pagebreak, Painter::line_onoffdash);
 643
 644         return 3 * defaultRowHeight();
 645 }
 646
 647
 648 int RowPainter::paintAppendixStart(int y)
 649 {
 650         LyXFont pb_font;
 651         pb_font.setColor(LColor::appendix).decSize();
 652
 653         string const label = _("Appendix");
 654         int w = 0;
 655         int a = 0;
 656         int d = 0;
 657         font_metrics::rectText(label, pb_font, w, a, d);
 658
 659         int const text_start = int(xo_ + (width_ - w) / 2);
 660         int const text_end = text_start + w;
 661
 662         pain_.rectText(text_start, y + d, label, pb_font);
 663
 664         pain_.line(int(xo_ + 1), y, text_start, y, LColor::appendix);
 665         pain_.line(text_end, y, int(xo_ + width_ - 2), y, LColor::appendix);
 666
 667         return 3 * defaultRowHeight();
 668 }
 669
 670
 671 void RowPainter::paintFirst()
 672 {
 673         ParagraphParameters const & parparams = pit_->params();
 674
 675         int y_top = 0;
 676
 677         // start of appendix?
 678         if (parparams.startOfAppendix())
 679                 y_top += paintAppendixStart(yo_ + y_top + 2 * defaultRowHeight());
 680
 681         // the top margin
 682         if (row_ == text_.firstRow() && !text_.isInInset())
 683                 y_top += PAPER_MARGIN;
 684
 685         // draw a top pagebreak
 686         if (parparams.pagebreakTop())
 687                 y_top += paintPageBreak(_("Page Break (top)"),
 688                         yo_ + y_top + 2 * defaultRowHeight());
 689
 690         // draw the additional space if needed:
 691         y_top += paintLengthMarker(_("Space above"), parparams.spaceTop(),
 692                         yo_ + y_top);
 693
 694         Buffer const & buffer = *bv_.buffer();
 695
 696         LyXLayout_ptr const & layout = pit_->layout();
 697
 698         if (buffer.params.paragraph_separation == BufferParams::PARSEP_SKIP) {
 699                 if (pit_ != text_.ownerParagraphs().begin()) {
 700                         if (layout->latextype == LATEX_PARAGRAPH
 701                                 && !pit_->getDepth()) {
 702                                 y_top += buffer.params.getDefSkip().inPixels(bv_);
 703                         } else {
 704                                 LyXLayout_ptr const & playout =
 705                                         boost::prior(pit_)->layout();
 706                                 if (playout->latextype == LATEX_PARAGRAPH
 707                                         && !boost::prior(pit_)->getDepth()) {
 708                                         // is it right to use defskip here, too? (AS)
 709                                         y_top += buffer.params.getDefSkip().inPixels(bv_);
 710                                 }
 711                         }
 712                 }
 713         }
 714
 715         int const ww = bv_.workWidth();
 716
 717         // draw a top line
 718         if (parparams.lineTop()) {
 719                 int const asc = font_metrics::ascent('x', getFont(0));
 720
 721                 y_top += asc;
 722
 723                 int const w = (text_.isInInset() ? text_.inset_owner->width() : ww);
 724                 int const xp = static_cast<int>(text_.isInInset() ? xo_ : 0);
 725                 pain_.line(xp, yo_ + y_top, xp + w, yo_ + y_top,
 726                         LColor::topline, Painter::line_solid,
 727                         Painter::line_thick);
 728
 729                 y_top += asc;
 730         }
 731
 732         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params);
 733
 734         // should we print a label?
 735         if (layout->labeltype >= LABEL_STATIC
 736             && (layout->labeltype != LABEL_STATIC
 737                 || layout->latextype != LATEX_ENVIRONMENT
 738                 || isFirstInSequence(pit_, text_.ownerParagraphs()))) {
 739
 740                 LyXFont font = getLabelFont();
 741                 if (!pit_->getLabelstring().empty()) {
 742                         double x = x_;
 743                         string const str = pit_->getLabelstring();
 744
 745                         // this is special code for the chapter layout. This is
 746                         // printed in an extra row and has a pagebreak at
 747                         // the top.
 748                         if (layout->labeltype == LABEL_COUNTER_CHAPTER) {
 749                                 if (buffer.params.secnumdepth >= 0) {
 750                                         float spacing_val = 1.0;
 751                                         if (!parparams.spacing().isDefault()) {
 752                                                 spacing_val = parparams.spacing().getValue();
 753                                         } else {
 754                                                 spacing_val = buffer.params.spacing.getValue();
 755                                         }
 756
 757                                         int const maxdesc =
 758                                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val)
 759                                                 + int(layout->parsep) * defaultRowHeight();
 760
 761                                         if (is_rtl) {
 762                                                 x = ww - leftMargin() -
 763                                                         font_metrics::width(str, font);
 764                                         }
 765
 766                                         pain_.text(int(x),
 767                                                 yo_ + row_->baseline() -
 768                                                 row_->ascent_of_text() - maxdesc,
 769                                                 str, font);
 770                                 }
 771                         } else {
 772                                 if (is_rtl) {
 773                                         x = ww - leftMargin()
 774                                                 + font_metrics::width(layout->labelsep, font);
 775                                 } else {
 776                                         x = x_ - font_metrics::width(layout->labelsep, font)
 777                                                 - font_metrics::width(str, font);
 778                                 }
 779
 780                                 pain_.text(int(x), yo_ + row_->baseline(), str, font);
 781                         }
 782                 }
 783
 784         // the labels at the top of an environment.
 785         // More or less for bibliography
 786         } else if (isFirstInSequence(pit_, text_.ownerParagraphs()) &&
 787                 (layout->labeltype == LABEL_TOP_ENVIRONMENT ||
 788                 layout->labeltype == LABEL_BIBLIO ||
 789                 layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 790                 LyXFont font = getLabelFont();
 791                 if (!pit_->getLabelstring().empty()) {
 792                         string const str = pit_->getLabelstring();
 793                         float spacing_val = 1.0;
 794                         if (!parparams.spacing().isDefault()) {
 795                                 spacing_val = parparams.spacing().getValue();
 796                         } else {
 797                                 spacing_val = buffer.params.spacing.getValue();
 798                         }
 799
 800                         int maxdesc =
 801                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val
 802                                 + (layout->labelbottomsep * defaultRowHeight()));
 803
 804                         double x = x_;
 805                         if (layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 806                                 x = ((is_rtl ? leftMargin() : x_)
 807                                          + ww - text_.rightMargin(pit_, *bv_.buffer(), *row_)) / 2;
 808                                 x -= font_metrics::width(str, font) / 2;
 809                         } else if (is_rtl) {
 810                                 x = ww - leftMargin() -
 811                                         font_metrics::width(str, font);
 812                         }
 813                         pain_.text(int(x),
 814                             yo_ + row_->baseline() - row_->ascent_of_text() - maxdesc,
 815                                   str, font);
 816                 }
 817         }
 818 }
 819
 820
 821 void RowPainter::paintLast()
 822 {
 823         ParagraphParameters const & parparams = pit_->params();
 824         int y_bottom = row_->height() - 1;
 825
 826         // the bottom margin
 827         if (row_ == text_.lastRow() && !text_.isInInset())
 828                 y_bottom -= PAPER_MARGIN;
 829
 830         int const ww = bv_.workWidth();
 831
 832         // draw a bottom pagebreak
 833         if (parparams.pagebreakBottom()) {
 834                 y_bottom -= paintPageBreak(_("Page Break (bottom)"),
 835                         yo_ + y_bottom - 2 * defaultRowHeight());
 836         }
 837
 838         // draw the additional space if needed:
 839         int const height = getLengthMarkerHeight(bv_, parparams.spaceBottom());
 840         y_bottom -= paintLengthMarker(_("Space below"), parparams.spaceBottom(),
 841                              yo_ + y_bottom - height);
 842
 843         // draw a bottom line
 844         if (parparams.lineBottom()) {
 845                 int const asc = font_metrics::ascent('x',
 846                         getFont(max(pos_type(0), pit_->size() - 1)));
 847
 848                 y_bottom -= asc;
 849
 850                 int const w = text_.isInInset() ? text_.inset_owner->width() : ww;
 851                 int const xp = int(text_.isInInset() ? xo_ : 0);
 852                 int const y = yo_ + y_bottom;
 853                 pain_.line(xp, y, xp + w, y, LColor::topline, Painter::line_solid,
 854                           Painter::line_thick);
 855
 856                 y_bottom -= asc;
 857         }
 858
 859         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params);
 860         int const endlabel = getEndLabel(pit_, text_.ownerParagraphs());
 861
 862         // draw an endlabel
 863         switch (endlabel) {
 864         case END_LABEL_BOX:
 865         case END_LABEL_FILLED_BOX:
 866         {
 867                 LyXFont const font = getLabelFont();
 868                 int const size = int(0.75 * font_metrics::maxAscent(font));
 869                 int const y = (yo_ + row_->baseline()) - size;
 870                 int x = is_rtl ? LEFT_MARGIN : ww - PAPER_MARGIN - size;
 871
 872                 if (row_->fill() <= size)
 873                         x += (size - row_->fill() + 1) * (is_rtl ? -1 : 1);
 874
 875                 if (endlabel == END_LABEL_BOX)
 876                         pain_.rectangle(x, y, size, size, LColor::eolmarker);
 877                 else
 878                         pain_.fillRectangle(x, y, size, size, LColor::eolmarker);
 879                 break;
 880         }
 881         case END_LABEL_STATIC:
 882         {
 883                 LyXFont font = getLabelFont();
 884                 string const & str = pit_->layout()->endlabelstring();
 885                 double const x = is_rtl ?
 886                         x_ - font_metrics::width(str, font)
 887                         : ww - text_.rightMargin(pit_, *bv_.buffer(), *row_) - row_->fill();
 888                 pain_.text(int(x), yo_ + row_->baseline(), str, font);
 889                 break;
 890         }
 891         case END_LABEL_NO_LABEL:
 892                 break;
 893         }
 894 }
 895
 896
 897 void RowPainter::paintText()
 898 {
 899         pos_type const last = lastPrintablePos(*pit_, row_);
 900         pos_type body_pos = pit_->beginningOfBody();
 901         if (body_pos > 0 &&
 902                 (body_pos - 1 > last || !pit_->isLineSeparator(body_pos - 1))) {
 903                 body_pos = 0;
 904         }
 905
 906         LyXLayout_ptr const & layout = pit_->layout();
 907
 908         bool running_strikeout = false;
 909         bool is_struckout = false;
 910         int last_strikeout_x = 0;
 911
 912         pos_type vpos = row_->pos();
 913         while (vpos <= last) {
 914                 if (x_ > bv_.workWidth())
 915                         break;
 916                 pos_type pos = text_.vis2log(vpos);
 917
 918                 if (pos >= pit_->size()) {
 919                         ++vpos;
 920                         continue;
 921                 }
 922
 923                 if (x_ + singleWidth(pos) < 0) {
 924                         x_ += singleWidth(pos);
 925                         ++vpos;
 926                         continue;
 927                 }
 928
 929                 is_struckout = isDeletedText(*pit_, pos);
 930
 931                 if (is_struckout && !running_strikeout) {
 932                         running_strikeout = true;
 933                         last_strikeout_x = int(x_);
 934                 }
 935
 936                 bool const highly_editable_inset = pit_->isInset(pos)
 937                         && isHighlyEditableInset(pit_->getInset(pos));
 938
 939                 // if we reach the end of a struck out range, paint it
 940                 // we also don't paint across things like tables
 941                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 942                         int const middle = yo_ + row_->top_of_text()
 943                                 + (row_->baseline() - row_->top_of_text()) / 2;
 944                         pain_.line(last_strikeout_x, middle, int(x_), middle,
 945                                 LColor::strikeout, Painter::line_solid, Painter::line_thin);
 946                         running_strikeout = false;
 947                 }
 948
 949                 if (body_pos > 0 && pos == body_pos - 1) {
 950                         int const lwidth = font_metrics::width(layout->labelsep,
 951                                 getLabelFont());
 952
 953                         x_ += label_hfill_ + lwidth - singleWidth(body_pos - 1);
 954                 }
 955
 956                 if (pit_->isHfill(pos)) {
 957                         x_ += 1;
 958
 959                         int const y0 = yo_ + row_->baseline();
 960                         int const y1 = y0 - defaultRowHeight() / 2;
 961
 962                         pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 963
 964                         if (hfillExpansion(*pit_, row_, pos)) {
 965                                 int const y2 = (y0 + y1) / 2;
 966
 967                                 if (pos >= body_pos) {
 968                                         pain_.line(int(x_), y2, int(x_ + hfill_), y2,
 969                                                   LColor::added_space,
 970                                                   Painter::line_onoffdash);
 971                                         x_ += hfill_;
 972                                 } else {
 973                                         pain_.line(int(x_), y2, int(x_ + label_hfill_), y2,
 974                                                   LColor::added_space,
 975                                                   Painter::line_onoffdash);
 976                                         x_ += label_hfill_;
 977                                 }
 978                                 pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 979                         }
 980                         x_ += 2;
 981                         ++vpos;
 982                 } else if (pit_->isSeparator(pos)) {
 983                         x_ += singleWidth(pos);
 984                         if (pos >= body_pos)
 985                                 x_ += separator_;
 986                         ++vpos;
 987                 } else {
 988                         paintFromPos(vpos);
 989                 }
 990         }
 991
 992         // if we reach the end of a struck out range, paint it
 993         if (running_strikeout) {
 994                 int const middle = yo_ + row_->top_of_text()
 995                         + ((row_->baseline() - row_->top_of_text()) / 2);
 996                 pain_.line(last_strikeout_x, middle, int(x_), middle,
 997                         LColor::strikeout, Painter::line_solid, Painter::line_thin);
 998                 running_strikeout = false;
 999         }
1000 }
1001
1002
1003 void RowPainter::paint()
1004 {
1005         width_       = text_.workWidth();
1006         x_           = row_->x();
1007         separator_   = row_->fill_separator();
1008         hfill_       = row_->fill_hfill();
1009         label_hfill_ = row_->fill_label_hfill();
1010
1011         // FIXME: what is this fixing ?
1012         if (text_.isInInset() && x_ < 0)
1013                 x_ = 0;
1014         x_ += xo_;
1015
1016         // If we're *not* at the top-level of rows, then the
1017         // background has already been cleared.
1018         if (&text_ == bv_.text)
1019                 paintBackground();
1020
1021         // paint the selection background
1022         if (text_.selection.set())
1023                 paintSelection();
1024
1025         // vertical lines for appendix
1026         paintAppendix();
1027
1028         // environment depth brackets
1029         paintDepthBar();
1030
1031         // changebar
1032         paintChangeBar();
1033
1034         if (row_->isParStart())
1035                 paintFirst();
1036
1037         if (isParEnd(*pit_, row_))
1038                 paintLast();
1039
1040         // paint text
1041         paintText();
1042 }
1043
1044
1045 int paintRows(BufferView const & bv, LyXText const & text,
1046         ParagraphList::iterator pit, RowList::iterator rit,
1047         int xo, int y, int yf, int yo)
1048 {
1049         //lyxerr << "  paintRows: rit: " << &*rit << endl;
1050         //const_cast<LyXText&>(text).updateRowPositions();
1051         int const yy = yf - y;
1052         int const y2 = bv.painter().paperHeight();
1053
1054         ParagraphList::iterator end = text.ownerParagraphs().end();
1055         bool active = false;
1056
1057         for ( ; pit != end; ++pit) {
1058                 RowList::iterator row = pit->rows.begin();
1059                 RowList::iterator rend = pit->rows.end();
1060
1061                 for ( ; row != rend; ++row) {
1062                         if (row == rit)
1063                                 active = true;
1064                         if (active) {
1065                                 RowPainter painter(bv, text, pit, row, y + yo, xo, y + bv.top_y());
1066                                 painter.paint();
1067                                 y += row->height();
1068                                 if (yy + y >= y2)
1069                                         return y;
1070                         } else {
1071                                 //lyxerr << "   paintRows: row: " << &*row << " ignored" << endl;
1072                         }
1073                 }
1074         }
1075
1076         return y;
1077 }
1078
1079 } // namespace anon
1080
1081
1082 int paintText(BufferView & bv)
1083 {
1084         int const topy = bv.top_y();
1085         ParagraphList::iterator pit;
1086         RowList::iterator rit = bv.text->getRowNearY(topy, pit);
1087         int y = rit->y() - topy;
1088         return paintRows(bv, *bv.text, pit, rit, 0, y, y, 0);
1089 }
1090
1091
1092 void paintTextInset(BufferView & bv, LyXText & text, int x, int baseline)
1093 {
1094         RowList::iterator rit = text.firstRow();
1095         RowList::iterator end = text.endRow();
1096         ParagraphList::iterator pit = text.ownerParagraphs().begin();
1097
1098         int y_offset = baseline - rit->ascent_of_text();
1099         int y = y_offset;
1100         while (rit != end && y + rit->height() <= 0) {
1101                 y += rit->height();
1102                 text.nextRow(pit, rit);
1103         }
1104         if (y_offset < 0)
1105                 paintRows(bv, text, pit, rit, x, 0, y, y);
1106         else
1107                 paintRows(bv, text, pit, rit, x, 0, y_offset, y_offset);
1108 }
1109
1110
1111 int getLengthMarkerHeight(BufferView const & bv, VSpace const & vsp)
1112 {
1113         if (vsp.kind() == VSpace::NONE)
1114                 return 0;
1115
1116         int const arrow_size = 4;
1117         int const space_size = vsp.inPixels(bv);
1118
1119         LyXFont font;
1120         font.decSize();
1121         int const min_size = max(3 * arrow_size,
1122                 font_metrics::maxAscent(font)
1123                 + font_metrics::maxDescent(font));
1124
1125         if (vsp.length().len().value() < 0.0)
1126                 return min_size;
1127         else
1128                 return max(min_size, space_size);
1129 }