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 "bufferparams.h"
  18 #include "BufferView.h"
  19 #include "encoding.h"
  20 #include "gettext.h"
  21 #include "language.h"
  22 #include "lyxrc.h"
  23 #include "lyxrow.h"
  24 #include "lyxrow_funcs.h"
  25 #include "metricsinfo.h"
  26 #include "paragraph_funcs.h"
  27 #include "ParagraphParameters.h"
  28 #include "vspace.h"
  29
  30 #include "frontends/font_metrics.h"
  31 #include "frontends/Painter.h"
  32
  33 #include "insets/insettext.h"
  34
  35 #include "support/textutils.h"
  36
  37
  38 using std::max;
  39 using lyx::pos_type;
  40
  41 extern int PAPER_MARGIN;
  42 extern int CHANGEBAR_MARGIN;
  43 extern int LEFT_MARGIN;
  44
  45 namespace {
  46
  47 // "temporary". We'll never get to use more
  48 // references until we start adding hacks like
  49 // these until other places catch up.
  50 BufferView * perv(BufferView const & bv)
  51 {
  52         return const_cast<BufferView *>(&bv);
  53 }
  54
  55 /**
  56  * A class used for painting an individual row of text.
  57  */
  58 class RowPainter {
  59 public:
  60         /// initialise painter
  61         RowPainter(BufferView const & bv, LyXText const & text,
  62                 ParagraphList::iterator pit,
  63                 RowList::iterator rit, int y_offset, int x_offset, int y);
  64
  65         /// do the painting
  66         void paint();
  67 private:
  68         // paint various parts
  69         void paintBackground();
  70         void paintSelection();
  71         void paintAppendix();
  72         void paintDepthBar();
  73         void paintChangeBar();
  74         void paintFirst();
  75         void paintLast();
  76         void paintForeignMark(double orig_x, LyXFont const & orig_font);
  77         void paintHebrewComposeChar(lyx::pos_type & vpos);
  78         void paintArabicComposeChar(lyx::pos_type & vpos);
  79         void paintChars(lyx::pos_type & vpos, bool hebrew, bool arabic);
  80         int paintPageBreak(string const & label, int y);
  81         int paintAppendixStart(int y);
  82         int paintLengthMarker(string const & prefix, VSpace const & vsp, int start);
  83         void paintText();
  84         void paintFromPos(lyx::pos_type & vpos);
  85         void paintInset(lyx::pos_type const pos);
  86
  87         /// return left margin
  88         int leftMargin() const;
  89
  90         /// return the font at the given pos
  91         LyXFont const getFont(lyx::pos_type pos) const;
  92
  93         /// return the label font for this row
  94         LyXFont const getLabelFont() const;
  95
  96         char const transformChar(char c, lyx::pos_type pos) const;
  97
  98         /// return pixel width for the given pos
  99         int singleWidth(lyx::pos_type pos) const;
 100         int singleWidth(lyx::pos_type pos, char c) const;
 101
 102         /// bufferview to paint on
 103         BufferView const & bv_;
 104
 105         /// Painter to use
 106         Painter & pain_;
 107
 108         /// LyXText for the row
 109         LyXText const & text_;
 110
 111         /// The row to paint
 112         RowList::iterator row_;
 113
 114         /// Row's paragraph
 115         mutable ParagraphList::iterator  pit_;
 116
 117         // Looks ugly - is
 118         double xo_;
 119         int yo_;
 120         double x_;
 121         int y_;
 122         int width_;
 123         double separator_;
 124         double hfill_;
 125         double label_hfill_;
 126 };
 127
 128
 129 RowPainter::RowPainter(BufferView const & bv, LyXText const & text,
 130      ParagraphList::iterator pit, RowList::iterator rit,
 131      int y_offset, int x_offset, int y)
 132         : bv_(bv), pain_(bv_.painter()), text_(text), row_(rit),
 133           pit_(pit), xo_(x_offset), yo_(y_offset), y_(y)
 134 {}
 135
 136
 137 /// "temporary"
 138 LyXFont const RowPainter::getFont(pos_type pos) const
 139 {
 140         return text_.getFont(pit_, pos);
 141 }
 142
 143
 144 int RowPainter::singleWidth(lyx::pos_type pos) const
 145 {
 146         return text_.singleWidth(pit_, pos);
 147 }
 148
 149
 150 int RowPainter::singleWidth(lyx::pos_type pos, char c) const
 151 {
 152         LyXFont const & font = text_.getFont(pit_, pos);
 153         return text_.singleWidth(pit_, pos, c, font);
 154 }
 155
 156
 157 LyXFont const RowPainter::getLabelFont() const
 158 {
 159         return text_.getLabelFont(pit_);
 160 }
 161
 162
 163 char const RowPainter::transformChar(char c, lyx::pos_type pos) const
 164 {
 165         return text_.transformChar(c, *pit_, pos);
 166 }
 167
 168
 169 int RowPainter::leftMargin() const
 170 {
 171         return text_.leftMargin(pit_, *row_);
 172 }
 173
 174
 175 void RowPainter::paintInset(pos_type const pos)
 176 {
 177         InsetOld * inset = const_cast<InsetOld*>(pit_->getInset(pos));
 178
 179         BOOST_ASSERT(inset);
 180
 181         PainterInfo pi(perv(bv_));
 182         pi.base.font = getFont(pos);
 183         inset->draw(pi, int(x_), yo_ + row_->baseline());
 184         x_ += inset->width();
 185 }
 186
 187
 188 void RowPainter::paintHebrewComposeChar(pos_type & vpos)
 189 {
 190         pos_type pos = text_.vis2log(vpos);
 191
 192         string str;
 193
 194         // first char
 195         char c = pit_->getChar(pos);
 196         str += c;
 197         ++vpos;
 198
 199         LyXFont const & font = getFont(pos);
 200         int const width = font_metrics::width(c, font);
 201         int dx = 0;
 202
 203         for (pos_type i = pos - 1; i >= 0; --i) {
 204                 c = pit_->getChar(i);
 205                 if (!Encodings::IsComposeChar_hebrew(c)) {
 206                         if (IsPrintableNonspace(c)) {
 207                                 int const width2 =
 208                                         singleWidth(i, c);
 209                                 // dalet / resh
 210                                 dx = (c == 'ø' || c == 'ã')
 211                                         ? width2 - width
 212                                         : (width2 - width) / 2;
 213                         }
 214                         break;
 215                 }
 216         }
 217
 218         // Draw nikud
 219         pain_.text(int(x_) + dx, yo_ + row_->baseline(), str, font);
 220 }
 221
 222
 223 void RowPainter::paintArabicComposeChar(pos_type & vpos)
 224 {
 225         pos_type pos = text_.vis2log(vpos);
 226         string str;
 227
 228         // first char
 229         char c = pit_->getChar(pos);
 230         c = transformChar(c, pos);
 231         str +=c;
 232         ++vpos;
 233
 234         LyXFont const & font = getFont(pos);
 235         int const width = font_metrics::width(c, font);
 236         int dx = 0;
 237
 238         for (pos_type i = pos - 1; i >= 0; --i) {
 239                 c = pit_->getChar(i);
 240                 if (!Encodings::IsComposeChar_arabic(c)) {
 241                         if (IsPrintableNonspace(c)) {
 242                                 int const width2 =
 243                                         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_.vis2log(vpos);
 257         pos_type const last = lastPos(*pit_, row_);
 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] = transformChar(c, pos);
 266         }
 267
 268         bool prev_struckout(isDeletedText(*pit_, pos));
 269         bool prev_newtext(isInsertedText(*pit_, pos));
 270
 271         ++vpos;
 272
 273         // collect as much similar chars as we can
 274         while (vpos <= last && (pos = text_.vis2log(vpos)) >= 0) {
 275                 char c = pit_->getChar(pos);
 276
 277                 if (!IsPrintableNonspace(c))
 278                         break;
 279
 280                 if (prev_struckout != isDeletedText(*pit_, pos))
 281                         break;
 282
 283                 if (prev_newtext != isInsertedText(*pit_, pos))
 284                         break;
 285
 286                 if (arabic && Encodings::IsComposeChar_arabic(c))
 287                         break;
 288                 if (hebrew && Encodings::IsComposeChar_hebrew(c))
 289                         break;
 290
 291                 if (orig_font != getFont(pos))
 292                         break;
 293
 294                 if (arabic)
 295                         c = transformChar(c, pos);
 296                 str += c;
 297                 ++vpos;
 298         }
 299
 300         if (prev_struckout) {
 301                 orig_font.setColor(LColor::strikeout);
 302         } else if (prev_newtext) {
 303                 orig_font.setColor(LColor::newtext);
 304         }
 305
 306         // Draw text and set the new x position
 307         //lyxerr << "paint row: yo_ " << yo_ << " baseline: " << row_->baseline()
 308         //      << "\n";
 309         pain_.text(int(x_), yo_ + row_->baseline(), str, orig_font);
 310         x_ += font_metrics::width(str, orig_font);
 311 }
 312
 313
 314 void RowPainter::paintForeignMark(double orig_x, LyXFont const & orig_font)
 315 {
 316         if (!lyxrc.mark_foreign_language)
 317                 return;
 318         if (orig_font.language() == latex_language)
 319                 return;
 320         if (orig_font.language() == bv_.buffer()->params().language)
 321                 return;
 322
 323         int const y = yo_ + row_->baseline() + 1;
 324         pain_.line(int(orig_x), y, int(x_), y, LColor::language);
 325 }
 326
 327
 328 void RowPainter::paintFromPos(pos_type & vpos)
 329 {
 330         pos_type const pos = text_.vis2log(vpos);
 331
 332         LyXFont const & orig_font = getFont(pos);
 333
 334         double const orig_x = x_;
 335
 336         char const c = pit_->getChar(pos);
 337
 338         if (IsInsetChar(c)) {
 339                 paintInset(pos);
 340                 ++vpos;
 341                 paintForeignMark(orig_x, orig_font);
 342                 return;
 343         }
 344
 345         // usual characters, no insets
 346
 347         // special case languages
 348         bool const hebrew = (orig_font.language()->lang() == "hebrew");
 349         bool const arabic =
 350                 orig_font.language()->lang() == "arabic" &&
 351                 (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 352                 lyxrc.font_norm_type == LyXRC::ISO_10646_1);
 353
 354         // draw as many chars as we can
 355         if ((!hebrew && !arabic)
 356                 || (hebrew && !Encodings::IsComposeChar_hebrew(c))
 357                 || (arabic && !Encodings::IsComposeChar_arabic(c))) {
 358                 paintChars(vpos, hebrew, arabic);
 359         } else if (hebrew) {
 360                 paintHebrewComposeChar(vpos);
 361         } else if (arabic) {
 362                 paintArabicComposeChar(vpos);
 363         }
 364
 365         paintForeignMark(orig_x, orig_font);
 366
 367         return;
 368 }
 369
 370
 371 void RowPainter::paintBackground()
 372 {
 373         int const x = int(xo_);
 374         int const y = yo_ < 0 ? 0 : yo_;
 375         int const h = yo_ < 0 ? row_->height() + yo_ : row_->height();
 376         pain_.fillRectangle(x, y, width_, h, text_.backgroundColor());
 377 }
 378
 379
 380 void RowPainter::paintSelection()
 381 {
 382         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params());
 383
 384         // the current selection
 385         int const startx = text_.selection.start.x();
 386         int const endx = text_.selection.end.x();
 387         int const starty = text_.selection.start.y();
 388         int const endy = text_.selection.end.y();
 389         RowList::iterator startrow = text_.getRow(text_.selection.start);
 390         RowList::iterator endrow = text_.getRow(text_.selection.end);
 391
 392         if (text_.bidi_same_direction) {
 393                 int x;
 394                 int y = yo_;
 395                 int w;
 396                 int h = row_->height();
 397
 398                 if (startrow == row_ && endrow == row_) {
 399                         if (startx < endx) {
 400                                 x = int(xo_) + startx;
 401                                 w = endx - startx;
 402                                 pain_.fillRectangle(x, y, w, h, LColor::selection);
 403                         } else {
 404                                 x = int(xo_) + endx;
 405                                 w = startx - endx;
 406                                 pain_.fillRectangle(x, y, w, h, LColor::selection);
 407                         }
 408                 } else if (startrow == row_) {
 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 == row_) {
 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 (y_ > starty && y_ < endy) {
 417                         pain_.fillRectangle(int(xo_), y, width_, h, LColor::selection);
 418                 }
 419                 return;
 420         } else if (startrow != row_ && endrow != row_) {
 421                 if (y_ > starty && y_ < endy) {
 422                         int w = width_;
 423                         int h = row_->height();
 424                         pain_.fillRectangle(int(xo_), yo_, w, h, LColor::selection);
 425                 }
 426                 return;
 427         }
 428
 429         if ((startrow != row_ && !is_rtl) || (endrow != row_ && is_rtl))
 430                 pain_.fillRectangle(int(xo_), yo_,
 431                         int(x_), row_->height(), LColor::selection);
 432
 433         pos_type const body_pos = pit_->beginningOfBody();
 434         pos_type const last = lastPos(*pit_, row_);
 435         double tmpx = x_;
 436
 437         for (pos_type vpos = row_->pos(); vpos <= last; ++vpos)  {
 438                 pos_type pos = text_.vis2log(vpos);
 439                 double const old_tmpx = tmpx;
 440                 if (body_pos > 0 && pos == body_pos - 1) {
 441                         LyXLayout_ptr const & layout = pit_->layout();
 442                         LyXFont const lfont = getLabelFont();
 443
 444                         tmpx += label_hfill_ + font_metrics::width(layout->labelsep, lfont);
 445
 446                         if (pit_->isLineSeparator(body_pos - 1))
 447                                 tmpx -= singleWidth(body_pos - 1);
 448                 }
 449
 450                 if (hfillExpansion(*pit_, row_, pos)) {
 451                         tmpx += singleWidth(pos);
 452                         if (pos >= body_pos)
 453                                 tmpx += hfill_;
 454                         else
 455                                 tmpx += label_hfill_;
 456                 }
 457
 458                 else if (pit_->isSeparator(pos)) {
 459                         tmpx += singleWidth(pos);
 460                         if (pos >= body_pos)
 461                                 tmpx += separator_;
 462                 } else {
 463                         tmpx += singleWidth(pos);
 464                 }
 465
 466                 if ((startrow != row_ || text_.selection.start.pos() <= pos) &&
 467                         (endrow != row_ || pos < text_.selection.end.pos())) {
 468                         // Here we do not use x_ as xo_ was added to x_.
 469                         pain_.fillRectangle(int(old_tmpx), yo_,
 470                                 int(tmpx - old_tmpx + 1),
 471                                 row_->height(), LColor::selection);
 472                 }
 473         }
 474
 475         if ((startrow != row_ && is_rtl) || (endrow != row_ && !is_rtl)) {
 476                 pain_.fillRectangle(int(xo_ + tmpx),
 477                                       yo_, int(bv_.workWidth() - tmpx),
 478                                       row_->height(), LColor::selection);
 479         }
 480 }
 481
 482
 483 void RowPainter::paintChangeBar()
 484 {
 485         pos_type const start = row_->pos();
 486         pos_type const end = lastPos(*pit_, row_);
 487
 488         if (!pit_->isChanged(start, end))
 489                 return;
 490
 491         int const height = (row_ == text_.lastRow())
 492                 ? row_->baseline()
 493                 : row_->height() + boost::next(row_)->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 (row_ != text_.firstRow()) {
 526                 ParagraphList::iterator pit2 = pit_;
 527                 if (row_ == pit2->rows.begin())
 528                         --pit2;
 529                 prev_depth = pit2->getDepth();
 530         }
 531
 532         Paragraph::depth_type next_depth = 0;
 533         if (row_ != text_.lastRow()) {
 534                 ParagraphList::iterator pit2 = pit_;
 535                 if (boost::next(row_) == pit2->rows.end())
 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_)
 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, int start)
 559 {
 560         if (vsp.kind() == VSpace::NONE)
 561                 return 0;
 562
 563         int const arrow_size = 4;
 564         int const size = getLengthMarkerHeight(bv_, vsp);
 565         int const end = start + size;
 566
 567         // the label to display (if any)
 568         string str;
 569         // y-values for top arrow
 570         int ty1, ty2;
 571         // y-values for bottom arrow
 572         int by1, by2;
 573
 574         str = prefix + " (" + vsp.asLyXCommand() + ")";
 575
 576         if (vsp.kind() == VSpace::VFILL) {
 577                 ty1 = ty2 = start;
 578                 by1 = by2 = end;
 579         } else {
 580                 // adding or removing space
 581                 bool const added = vsp.kind() != VSpace::LENGTH ||
 582                                    vsp.length().len().value() > 0.0;
 583                 ty1 = added ? (start + arrow_size) : start;
 584                 ty2 = added ? start : (start + arrow_size);
 585                 by1 = added ? (end - arrow_size) : end;
 586                 by2 = added ? end : (end - arrow_size);
 587         }
 588
 589         int const leftx = int(xo_) + leftMargin();
 590         int const midx = leftx + arrow_size;
 591         int const rightx = midx + arrow_size;
 592
 593         // first the string
 594         int w = 0;
 595         int a = 0;
 596         int d = 0;
 597
 598         LyXFont font;
 599         font.setColor(LColor::added_space).decSize().decSize();
 600         font_metrics::rectText(str, font, w, a, d);
 601
 602         pain_.rectText(leftx + 2 * arrow_size + 5,
 603                          start + ((end - start) / 2) + d,
 604                          str, font);
 605
 606         // top arrow
 607         pain_.line(leftx, ty1, midx, ty2, LColor::added_space);
 608         pain_.line(midx, ty2, rightx, ty1, LColor::added_space);
 609
 610         // bottom arrow
 611         pain_.line(leftx, by1, midx, by2, LColor::added_space);
 612         pain_.line(midx, by2, rightx, by1, LColor::added_space);
 613
 614         // joining line
 615         pain_.line(midx, ty2, midx, by2, LColor::added_space);
 616
 617         return size;
 618 }
 619
 620
 621 int RowPainter::paintPageBreak(string const & label, int y)
 622 {
 623         LyXFont pb_font;
 624         pb_font.setColor(LColor::pagebreak).decSize();
 625
 626         int w = 0;
 627         int a = 0;
 628         int d = 0;
 629         font_metrics::rectText(label, pb_font, w, a, d);
 630
 631         int const text_start = int(xo_ + (width_ - w) / 2);
 632         int const text_end = text_start + w;
 633
 634         pain_.rectText(text_start, y + d, label, pb_font);
 635
 636         pain_.line(int(xo_), y, text_start, y,
 637                 LColor::pagebreak, Painter::line_onoffdash);
 638         pain_.line(text_end, y, int(xo_ + width_), y,
 639                 LColor::pagebreak, Painter::line_onoffdash);
 640
 641         return 3 * defaultRowHeight();
 642 }
 643
 644
 645 int RowPainter::paintAppendixStart(int y)
 646 {
 647         LyXFont pb_font;
 648         pb_font.setColor(LColor::appendix).decSize();
 649
 650         string const label = _("Appendix");
 651         int w = 0;
 652         int a = 0;
 653         int d = 0;
 654         font_metrics::rectText(label, pb_font, w, a, d);
 655
 656         int const text_start = int(xo_ + (width_ - w) / 2);
 657         int const text_end = text_start + w;
 658
 659         pain_.rectText(text_start, y + d, label, pb_font);
 660
 661         pain_.line(int(xo_ + 1), y, text_start, y, LColor::appendix);
 662         pain_.line(text_end, y, int(xo_ + width_ - 2), y, LColor::appendix);
 663
 664         return 3 * defaultRowHeight();
 665 }
 666
 667
 668 void RowPainter::paintFirst()
 669 {
 670         ParagraphParameters const & parparams = pit_->params();
 671
 672         int y_top = 0;
 673
 674         // start of appendix?
 675         if (parparams.startOfAppendix())
 676                 y_top += paintAppendixStart(yo_ + y_top + 2 * defaultRowHeight());
 677
 678         // the top margin
 679         if (row_ == text_.firstRow() && !text_.isInInset())
 680                 y_top += PAPER_MARGIN;
 681
 682         // draw a top pagebreak
 683         if (parparams.pagebreakTop())
 684                 y_top += paintPageBreak(_("Page Break (top)"),
 685                         yo_ + y_top + 2 * defaultRowHeight());
 686
 687         // draw the additional space if needed:
 688         y_top += paintLengthMarker(_("Space above"), parparams.spaceTop(),
 689                         yo_ + y_top);
 690
 691         Buffer const & buffer = *bv_.buffer();
 692
 693         LyXLayout_ptr const & layout = pit_->layout();
 694
 695         if (buffer.params().paragraph_separation == BufferParams::PARSEP_SKIP) {
 696                 if (pit_ != text_.ownerParagraphs().begin()) {
 697                         if (layout->latextype == LATEX_PARAGRAPH
 698                                 && !pit_->getDepth()) {
 699                                 y_top += buffer.params().getDefSkip().inPixels(bv_);
 700                         } else {
 701                                 LyXLayout_ptr const & playout =
 702                                         boost::prior(pit_)->layout();
 703                                 if (playout->latextype == LATEX_PARAGRAPH
 704                                         && !boost::prior(pit_)->getDepth()) {
 705                                         // is it right to use defskip here, too? (AS)
 706                                         y_top += buffer.params().getDefSkip().inPixels(bv_);
 707                                 }
 708                         }
 709                 }
 710         }
 711
 712         int const ww = bv_.workWidth();
 713
 714         // draw a top line
 715         if (parparams.lineTop()) {
 716                 int const asc = font_metrics::ascent('x', getFont(0));
 717
 718                 y_top += asc;
 719
 720                 int const w = (text_.isInInset() ? text_.inset_owner->width() : ww);
 721                 int const xp = static_cast<int>(text_.isInInset() ? xo_ : 0);
 722                 pain_.line(xp, yo_ + y_top, xp + w, yo_ + y_top,
 723                         LColor::topline, Painter::line_solid,
 724                         Painter::line_thick);
 725
 726                 y_top += asc;
 727         }
 728
 729         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params());
 730
 731         // should we print a label?
 732         if (layout->labeltype >= LABEL_STATIC
 733             && (layout->labeltype != LABEL_STATIC
 734                 || layout->latextype != LATEX_ENVIRONMENT
 735                 || isFirstInSequence(pit_, text_.ownerParagraphs()))) {
 736
 737                 LyXFont font = getLabelFont();
 738                 if (!pit_->getLabelstring().empty()) {
 739                         double x = x_;
 740                         string const str = pit_->getLabelstring();
 741
 742                         // this is special code for the chapter layout. This is
 743                         // printed in an extra row and has a pagebreak at
 744                         // the top.
 745                         if (layout->labeltype == LABEL_COUNTER_CHAPTER) {
 746                                 if (buffer.params().secnumdepth >= 0) {
 747                                         float spacing_val = 1.0;
 748                                         if (!parparams.spacing().isDefault()) {
 749                                                 spacing_val = parparams.spacing().getValue();
 750                                         } else {
 751                                                 spacing_val = buffer.params().spacing().getValue();
 752                                         }
 753
 754                                         int const maxdesc =
 755                                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val)
 756                                                 + int(layout->parsep) * defaultRowHeight();
 757
 758                                         if (is_rtl) {
 759                                                 x = ww - leftMargin() -
 760                                                         font_metrics::width(str, font);
 761                                         }
 762
 763                                         pain_.text(int(x),
 764                                                 yo_ + row_->baseline() -
 765                                                 row_->ascent_of_text() - maxdesc,
 766                                                 str, font);
 767                                 }
 768                         } else {
 769                                 if (is_rtl) {
 770                                         x = ww - leftMargin()
 771                                                 + font_metrics::width(layout->labelsep, font);
 772                                 } else {
 773                                         x = x_ - font_metrics::width(layout->labelsep, font)
 774                                                 - font_metrics::width(str, font);
 775                                 }
 776
 777                                 pain_.text(int(x), yo_ + row_->baseline(), str, font);
 778                         }
 779                 }
 780
 781         // the labels at the top of an environment.
 782         // More or less for bibliography
 783         } else if (isFirstInSequence(pit_, text_.ownerParagraphs()) &&
 784                 (layout->labeltype == LABEL_TOP_ENVIRONMENT ||
 785                 layout->labeltype == LABEL_BIBLIO ||
 786                 layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 787                 LyXFont font = getLabelFont();
 788                 if (!pit_->getLabelstring().empty()) {
 789                         string const str = pit_->getLabelstring();
 790                         float spacing_val = 1.0;
 791                         if (!parparams.spacing().isDefault()) {
 792                                 spacing_val = parparams.spacing().getValue();
 793                         } else {
 794                                 spacing_val = buffer.params().spacing().getValue();
 795                         }
 796
 797                         int maxdesc =
 798                                 int(font_metrics::maxDescent(font) * layout->spacing.getValue() * spacing_val
 799                                 + (layout->labelbottomsep * defaultRowHeight()));
 800
 801                         double x = x_;
 802                         if (layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 803                                 x = ((is_rtl ? leftMargin() : x_)
 804                                          + ww - text_.rightMargin(pit_, *bv_.buffer(), *row_)) / 2;
 805                                 x -= font_metrics::width(str, font) / 2;
 806                         } else if (is_rtl) {
 807                                 x = ww - leftMargin() -
 808                                         font_metrics::width(str, font);
 809                         }
 810                         pain_.text(int(x),
 811                             yo_ + row_->baseline() - row_->ascent_of_text() - maxdesc,
 812                                   str, font);
 813                 }
 814         }
 815 }
 816
 817
 818 void RowPainter::paintLast()
 819 {
 820         ParagraphParameters const & parparams = pit_->params();
 821         int y_bottom = row_->height() - 1;
 822
 823         // the bottom margin
 824         if (row_ == text_.lastRow() && !text_.isInInset())
 825                 y_bottom -= PAPER_MARGIN;
 826
 827         int const ww = bv_.workWidth();
 828
 829         // draw a bottom pagebreak
 830         if (parparams.pagebreakBottom()) {
 831                 y_bottom -= paintPageBreak(_("Page Break (bottom)"),
 832                         yo_ + y_bottom - 2 * defaultRowHeight());
 833         }
 834
 835         // draw the additional space if needed:
 836         int const height = getLengthMarkerHeight(bv_, parparams.spaceBottom());
 837         y_bottom -= paintLengthMarker(_("Space below"), parparams.spaceBottom(),
 838                              yo_ + y_bottom - height);
 839
 840         // draw a bottom line
 841         if (parparams.lineBottom()) {
 842                 int const asc = font_metrics::ascent('x',
 843                         getFont(max(pos_type(0), pit_->size() - 1)));
 844
 845                 y_bottom -= asc;
 846
 847                 int const w = text_.isInInset() ? text_.inset_owner->width() : ww;
 848                 int const xp = int(text_.isInInset() ? xo_ : 0);
 849                 int const y = yo_ + y_bottom;
 850                 pain_.line(xp, y, xp + w, y, LColor::topline, Painter::line_solid,
 851                           Painter::line_thick);
 852
 853                 y_bottom -= asc;
 854         }
 855
 856         bool const is_rtl = pit_->isRightToLeftPar(bv_.buffer()->params());
 857         int const endlabel = getEndLabel(pit_, text_.ownerParagraphs());
 858
 859         // draw an endlabel
 860         switch (endlabel) {
 861         case END_LABEL_BOX:
 862         case END_LABEL_FILLED_BOX:
 863         {
 864                 LyXFont const font = getLabelFont();
 865                 int const size = int(0.75 * font_metrics::maxAscent(font));
 866                 int const y = (yo_ + row_->baseline()) - size;
 867                 int x = is_rtl ? LEFT_MARGIN : ww - PAPER_MARGIN - size;
 868
 869                 if (row_->fill() <= size)
 870                         x += (size - row_->fill() + 1) * (is_rtl ? -1 : 1);
 871
 872                 if (endlabel == END_LABEL_BOX)
 873                         pain_.rectangle(x, y, size, size, LColor::eolmarker);
 874                 else
 875                         pain_.fillRectangle(x, y, size, size, LColor::eolmarker);
 876                 break;
 877         }
 878         case END_LABEL_STATIC:
 879         {
 880                 LyXFont font = getLabelFont();
 881                 string const & str = pit_->layout()->endlabelstring();
 882                 double const x = is_rtl ?
 883                         x_ - font_metrics::width(str, font)
 884                         : ww - text_.rightMargin(pit_, *bv_.buffer(), *row_) - row_->fill();
 885                 pain_.text(int(x), yo_ + row_->baseline(), str, font);
 886                 break;
 887         }
 888         case END_LABEL_NO_LABEL:
 889                 break;
 890         }
 891 }
 892
 893
 894 void RowPainter::paintText()
 895 {
 896         pos_type const last = lastPos(*pit_, row_);
 897         pos_type body_pos = pit_->beginningOfBody();
 898         if (body_pos > 0 &&
 899                 (body_pos - 1 > last || !pit_->isLineSeparator(body_pos - 1))) {
 900                 body_pos = 0;
 901         }
 902
 903         LyXLayout_ptr const & layout = pit_->layout();
 904
 905         bool running_strikeout = false;
 906         bool is_struckout = false;
 907         int last_strikeout_x = 0;
 908
 909         pos_type vpos = row_->pos();
 910         while (vpos <= last) {
 911                 if (x_ > bv_.workWidth())
 912                         break;
 913                 pos_type pos = text_.vis2log(vpos);
 914
 915                 if (pos >= pit_->size()) {
 916                         ++vpos;
 917                         continue;
 918                 }
 919
 920                 if (x_ + singleWidth(pos) < 0) {
 921                         x_ += singleWidth(pos);
 922                         ++vpos;
 923                         continue;
 924                 }
 925
 926                 is_struckout = isDeletedText(*pit_, pos);
 927
 928                 if (is_struckout && !running_strikeout) {
 929                         running_strikeout = true;
 930                         last_strikeout_x = int(x_);
 931                 }
 932
 933                 bool const highly_editable_inset = pit_->isInset(pos)
 934                         && isHighlyEditableInset(pit_->getInset(pos));
 935
 936                 // if we reach the end of a struck out range, paint it
 937                 // we also don't paint across things like tables
 938                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 939                         int const middle = yo_ + row_->top_of_text()
 940                                 + (row_->baseline() - row_->top_of_text()) / 2;
 941                         pain_.line(last_strikeout_x, middle, int(x_), middle,
 942                                 LColor::strikeout, Painter::line_solid, Painter::line_thin);
 943                         running_strikeout = false;
 944                 }
 945
 946                 if (body_pos > 0 && pos == body_pos - 1) {
 947                         int const lwidth = font_metrics::width(layout->labelsep,
 948                                 getLabelFont());
 949
 950                         x_ += label_hfill_ + lwidth - singleWidth(body_pos - 1);
 951                 }
 952
 953                 if (pit_->isHfill(pos)) {
 954                         x_ += 1;
 955
 956                         int const y0 = yo_ + row_->baseline();
 957                         int const y1 = y0 - defaultRowHeight() / 2;
 958
 959                         pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 960
 961                         if (hfillExpansion(*pit_, row_, pos)) {
 962                                 int const y2 = (y0 + y1) / 2;
 963
 964                                 if (pos >= body_pos) {
 965                                         pain_.line(int(x_), y2, int(x_ + hfill_), y2,
 966                                                   LColor::added_space,
 967                                                   Painter::line_onoffdash);
 968                                         x_ += hfill_;
 969                                 } else {
 970                                         pain_.line(int(x_), y2, int(x_ + label_hfill_), y2,
 971                                                   LColor::added_space,
 972                                                   Painter::line_onoffdash);
 973                                         x_ += label_hfill_;
 974                                 }
 975                                 pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 976                         }
 977                         x_ += 2;
 978                         ++vpos;
 979                 } else if (pit_->isSeparator(pos)) {
 980                         x_ += singleWidth(pos);
 981                         if (pos >= body_pos)
 982                                 x_ += separator_;
 983                         ++vpos;
 984                 } else {
 985                         paintFromPos(vpos);
 986                 }
 987         }
 988
 989         // if we reach the end of a struck out range, paint it
 990         if (running_strikeout) {
 991                 int const middle = yo_ + row_->top_of_text()
 992                         + ((row_->baseline() - row_->top_of_text()) / 2);
 993                 pain_.line(last_strikeout_x, middle, int(x_), middle,
 994                         LColor::strikeout, Painter::line_solid, Painter::line_thin);
 995                 running_strikeout = false;
 996         }
 997 }
 998
 999
1000 void RowPainter::paint()
1001 {
1002         width_       = text_.workWidth();
1003         x_           = row_->x();
1004         separator_   = row_->fill_separator();
1005         hfill_       = row_->fill_hfill();
1006         label_hfill_ = row_->fill_label_hfill();
1007
1008         // FIXME: what is this fixing ?
1009         if (text_.isInInset() && x_ < 0)
1010                 x_ = 0;
1011         x_ += xo_;
1012
1013         // If we're *not* at the top-level of rows, then the
1014         // background has already been cleared.
1015         if (&text_ == bv_.text)
1016                 paintBackground();
1017
1018         // paint the selection background
1019         if (text_.selection.set())
1020                 paintSelection();
1021
1022         // vertical lines for appendix
1023         paintAppendix();
1024
1025         // environment depth brackets
1026         paintDepthBar();
1027
1028         // changebar
1029         paintChangeBar();
1030
1031         if (row_->isParStart())
1032                 paintFirst();
1033
1034         if (isParEnd(*pit_, row_))
1035                 paintLast();
1036
1037         // paint text
1038         paintText();
1039 }
1040
1041
1042 int paintRows(BufferView const & bv, LyXText const & text,
1043         ParagraphList::iterator pit, RowList::iterator rit,
1044         int xo, int y, int yf, int yo)
1045 {
1046         //lyxerr << "  paintRows: rit: " << &*rit << endl;
1047         //const_cast<LyXText&>(text).updateRowPositions();
1048         int const yy = yf - y;
1049         int const y2 = bv.painter().paperHeight();
1050
1051         ParagraphList::iterator end = text.ownerParagraphs().end();
1052         bool active = false;
1053
1054         for ( ; pit != end; ++pit) {
1055                 RowList::iterator row = pit->rows.begin();
1056                 RowList::iterator rend = pit->rows.end();
1057
1058                 for ( ; row != rend; ++row) {
1059                         if (row == rit)
1060                                 active = true;
1061                         if (active) {
1062                                 RowPainter painter(bv, text, pit, row, y + yo, xo, y + bv.top_y());
1063                                 painter.paint();
1064                                 y += row->height();
1065                                 if (yy + y >= y2)
1066                                         return y;
1067                         } else {
1068                                 //lyxerr << "   paintRows: row: " << &*row << " ignored" << endl;
1069                         }
1070                 }
1071         }
1072
1073         return y;
1074 }
1075
1076 } // namespace anon
1077
1078
1079 int paintText(BufferView & bv)
1080 {
1081         int const topy = bv.top_y();
1082         ParagraphList::iterator pit;
1083         RowList::iterator rit = bv.text->getRowNearY(topy, pit);
1084         int y = rit->y() - topy;
1085         return paintRows(bv, *bv.text, pit, rit, 0, y, y, 0);
1086 }
1087
1088
1089 void paintTextInset(BufferView & bv, LyXText & text, int x, int baseline)
1090 {
1091         RowList::iterator rit = text.firstRow();
1092         RowList::iterator end = text.endRow();
1093         ParagraphList::iterator pit = text.ownerParagraphs().begin();
1094
1095         int y_offset = baseline - rit->ascent_of_text();
1096         int y = y_offset;
1097         while (rit != end && y + rit->height() <= 0) {
1098                 y += rit->height();
1099                 text.nextRow(pit, rit);
1100         }
1101         if (y_offset < 0)
1102                 paintRows(bv, text, pit, rit, x, 0, y, y);
1103         else
1104                 paintRows(bv, text, pit, rit, x, 0, y_offset, y_offset);
1105 }
1106
1107
1108 int getLengthMarkerHeight(BufferView const & bv, VSpace const & vsp)
1109 {
1110         if (vsp.kind() == VSpace::NONE)
1111                 return 0;
1112
1113         int const arrow_size = 4;
1114         int const space_size = vsp.inPixels(bv);
1115
1116         LyXFont font;
1117         font.decSize();
1118         int const min_size = max(3 * arrow_size,
1119                 font_metrics::maxAscent(font)
1120                 + font_metrics::maxDescent(font));
1121
1122         if (vsp.length().len().value() < 0.0)
1123                 return min_size;
1124         else
1125                 return max(min_size, space_size);
1126 }