src/rowpainter.C

   1 /**
   2  * \file rowpainter.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author various
   7  * \author John Levon
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "rowpainter.h"
  15
  16 #include "buffer.h"
  17 #include "coordcache.h"
  18 #include "cursor.h"
  19 #include "debug.h"
  20 #include "bufferparams.h"
  21 #include "BufferView.h"
  22 #include "encoding.h"
  23 #include "gettext.h"
  24 #include "language.h"
  25 #include "LColor.h"
  26 #include "lyxrc.h"
  27 #include "lyxrow.h"
  28 #include "lyxrow_funcs.h"
  29 #include "metricsinfo.h"
  30 #include "paragraph.h"
  31 #include "paragraph_funcs.h"
  32 #include "ParagraphParameters.h"
  33 #include "vspace.h"
  34
  35 #include "frontends/FontMetrics.h"
  36 #include "frontends/nullpainter.h"
  37 #include "frontends/Painter.h"
  38
  39 #include "insets/insettext.h"
  40
  41 #include "support/textutils.h"
  42
  43 #include <boost/crc.hpp>
  44
  45
  46 namespace lyx {
  47
  48 using frontend::Painter;
  49 using frontend::NullPainter;
  50 using frontend::FontMetrics;
  51
  52 using std::endl;
  53 using std::max;
  54 using std::min;
  55 using std::string;
  56
  57
  58 namespace {
  59
  60 /// Flag: do a full redraw of inside text of inset
  61 /// Working variable indicating a full screen refresh
  62 bool refreshInside;
  63
  64 /**
  65  * A class used for painting an individual row of text.
  66  */
  67 class RowPainter {
  68 public:
  69         /// initialise and run painter
  70         RowPainter(PainterInfo & pi, LyXText const & text,
  71                 pit_type pit, Row const & row, int x, int y);
  72
  73         // paint various parts
  74         void paintAppendix();
  75         void paintDepthBar();
  76         void paintChangeBar();
  77         void paintFirst();
  78         void paintLast();
  79         void paintText();
  80
  81 private:
  82         void paintForeignMark(double orig_x, LyXFont const & font, int desc = 0);
  83         void paintHebrewComposeChar(pos_type & vpos, LyXFont const & font);
  84         void paintArabicComposeChar(pos_type & vpos, LyXFont const & font);
  85         void paintChars(pos_type & vpos, LyXFont font,
  86                         bool hebrew, bool arabic);
  87         int paintAppendixStart(int y);
  88         void paintFromPos(pos_type & vpos);
  89         void paintInset(pos_type const pos, LyXFont const & font);
  90
  91         /// return left margin
  92         int leftMargin() const;
  93
  94         /// return the label font for this row
  95         LyXFont const getLabelFont() const;
  96
  97         /// bufferview to paint on
  98         BufferView & bv_;
  99
 100         /// Painter to use
 101         Painter & pain_;
 102
 103         /// LyXText for the row
 104         LyXText const & text_;
 105         ParagraphList const & pars_;
 106
 107         /// The row to paint
 108         Row const & row_;
 109
 110         /// Row's paragraph
 111         pit_type const pit_;
 112         Paragraph const & par_;
 113
 114         /// is row erased? (change tracking)
 115         bool erased_;
 116
 117         // Looks ugly - is
 118         double const xo_;
 119         int const yo_;    // current baseline
 120         double x_;
 121         int width_;
 122         double separator_;
 123         double hfill_;
 124         double label_hfill_;
 125 };
 126
 127
 128 RowPainter::RowPainter(PainterInfo & pi,
 129         LyXText const & text, pit_type pit, Row const & row, int x, int y)
 130         : bv_(*pi.base.bv), pain_(pi.pain), text_(text), pars_(text.paragraphs()),
 131           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
 132           erased_(pi.erased_),
 133           xo_(x), yo_(y), width_(text_.width())
 134 {
 135         RowMetrics m = text_.computeRowMetrics(pit, row_);
 136         x_ = m.x + xo_;
 137
 138         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
 139         //row_.dump();
 140
 141         separator_ = m.separator;
 142         hfill_ = m.hfill;
 143         label_hfill_ = m.label_hfill;
 144
 145         BOOST_ASSERT(pit >= 0);
 146         BOOST_ASSERT(pit < int(text.paragraphs().size()));
 147 }
 148
 149
 150 LyXFont const RowPainter::getLabelFont() const
 151 {
 152         return text_.getLabelFont(par_);
 153 }
 154
 155
 156 int RowPainter::leftMargin() const
 157 {
 158         return text_.leftMargin(pit_, row_.pos());
 159 }
 160
 161
 162 void RowPainter::paintInset(pos_type const pos, LyXFont const & font)
 163 {
 164         InsetBase const * inset = par_.getInset(pos);
 165         BOOST_ASSERT(inset);
 166         PainterInfo pi(const_cast<BufferView *>(&bv_), pain_);
 167         // FIXME: We should always use font, see documentation of
 168         // noFontChange() in insetbase.h.
 169         pi.base.font = inset->noFontChange() ?
 170                 bv_.buffer()->params().getFont() :
 171                 font;
 172         pi.ltr_pos = (text_.bidi.level(pos) % 2 == 0);
 173         pi.erased_ = erased_ || par_.isDeleted(pos);
 174         bv_.coordCache().insets().add(inset, int(x_), yo_);
 175         InsetText const * const in = inset->asTextInset();
 176         // non-wide insets are painted completely. Recursive
 177         bool tmp = refreshInside;
 178         if (!in || !in->Wide()) {
 179                 refreshInside = true;
 180                 lyxerr[Debug::PAINTING] << endl << "Paint inset fully" << endl;
 181         }
 182         if (refreshInside)
 183                 inset->drawSelection(pi, int(x_), yo_);
 184         inset->draw(pi, int(x_), yo_);
 185         refreshInside = tmp;
 186         x_ += inset->width();
 187 }
 188
 189
 190 void RowPainter::paintHebrewComposeChar(pos_type & vpos, LyXFont const & font)
 191 {
 192         pos_type pos = text_.bidi.vis2log(vpos);
 193
 194         docstring str;
 195
 196         // first char
 197         char_type c = par_.getChar(pos);
 198         str += c;
 199         ++vpos;
 200
 201         int const width = theFontMetrics(font).width(c);
 202         int dx = 0;
 203
 204         for (pos_type i = pos - 1; i >= 0; --i) {
 205                 c = par_.getChar(i);
 206                 if (!Encodings::isComposeChar_hebrew(c)) {
 207                         if (isPrintableNonspace(c)) {
 208                                 int const width2 =
 209                                         text_.singleWidth(par_, i, c, text_.getFont(par_, i));
 210                                 // FIXME UNICODE
 211                                 // This does not work anymore, and non-ascii
 212                                 // characters in source files are forbidden
 213                                 // anyway.
 214                                 // dalet / resh
 215                                 dx = (c == 'ø' || c == 'ã')
 216                                         ? width2 - width
 217                                         : (width2 - width) / 2;
 218                         }
 219                         break;
 220                 }
 221         }
 222
 223         // Draw nikud
 224         // FIXME UNICODE
 225         pain_.text(int(x_) + dx, yo_, str, font);
 226 }
 227
 228
 229 void RowPainter::paintArabicComposeChar(pos_type & vpos, LyXFont const & font)
 230 {
 231         pos_type pos = text_.bidi.vis2log(vpos);
 232         docstring str;
 233
 234         // first char
 235         char_type c = par_.getChar(pos);
 236         c = par_.transformChar(c, pos);
 237         str += c;
 238         ++vpos;
 239
 240         int const width = theFontMetrics(font).width(c);
 241         int dx = 0;
 242
 243         for (pos_type i = pos - 1; i >= 0; --i) {
 244                 c = par_.getChar(i);
 245                 if (!Encodings::isComposeChar_arabic(c)) {
 246                         if (isPrintableNonspace(c)) {
 247                                 int const width2 =
 248                                         text_.singleWidth(par_, i, c, text_.getFont(par_, i));
 249                                 dx = (width2 - width) / 2;
 250                         }
 251                         break;
 252                 }
 253         }
 254         // Draw nikud
 255         pain_.text(int(x_) + dx, yo_, str, font);
 256 }
 257
 258
 259 void RowPainter::paintChars(pos_type & vpos, LyXFont font,
 260                             bool hebrew, bool arabic)
 261 {
 262         pos_type pos = text_.bidi.vis2log(vpos);
 263         pos_type const end = row_.endpos();
 264         FontSpan const font_span = par_.fontSpan(pos);
 265         Change::Type const prev_change = par_.lookupChange(pos).type;
 266
 267         // first character
 268 #if 0
 269         string str;
 270         str += par_.getChar(pos);
 271 #else
 272         std::vector<char_type> str;
 273         str.push_back(par_.getChar(pos));
 274 #endif
 275         if (arabic) {
 276                 char_type c = str[0];
 277                 str[0] = par_.transformChar(c, pos);
 278         }
 279
 280         // collect as much similar chars as we can
 281         for (++vpos ; vpos < end ; ++vpos) {
 282                 pos = text_.bidi.vis2log(vpos);
 283                 if (pos < font_span.first || pos > font_span.last)
 284                         break;
 285
 286                 if (prev_change != par_.lookupChange(pos).type)
 287                         break;
 288
 289                 char_type c = par_.getChar(pos);
 290
 291                 if (!isPrintableNonspace(c))
 292                         break;
 293
 294                 if (arabic && Encodings::isComposeChar_arabic(c))
 295                         break;
 296
 297                 if (hebrew && Encodings::isComposeChar_hebrew(c))
 298                         break;
 299
 300                 if (arabic)
 301                         c = par_.transformChar(c, pos);
 302
 303 #if 0
 304                 str += c;
 305 #else
 306                 str.push_back(c);
 307 #endif
 308         }
 309
 310         if (prev_change == Change::DELETED)
 311                 font.setColor(LColor::strikeout);
 312         else if (prev_change == Change::INSERTED)
 313                 font.setColor(LColor::newtext);
 314
 315         // Draw text and set the new x position
 316         //lyxerr << "paint row: yo_ " << yo_ << "\n";
 317 #if 0
 318         int width = pain_.text(int(x_), yo_, str, font);
 319 #else
 320         int width = pain_.text(int(x_), yo_, &str[0], str.size(), font);
 321 #endif
 322         x_ += width;
 323 }
 324
 325
 326 void RowPainter::paintForeignMark(double orig_x, LyXFont const & font, int desc)
 327 {
 328         if (!lyxrc.mark_foreign_language)
 329                 return;
 330         if (font.language() == latex_language)
 331                 return;
 332         if (font.language() == bv_.buffer()->params().language)
 333                 return;
 334
 335         int const y = yo_ + 1 + desc;
 336         pain_.line(int(orig_x), y, int(x_), y, LColor::language);
 337 }
 338
 339
 340 void RowPainter::paintFromPos(pos_type & vpos)
 341 {
 342         pos_type const pos = text_.bidi.vis2log(vpos);
 343         LyXFont orig_font = text_.getFont(par_, pos);
 344
 345         double const orig_x = x_;
 346
 347         if (par_.isInset(pos)) {
 348                 paintInset(pos, orig_font);
 349                 ++vpos;
 350                 paintForeignMark(orig_x, orig_font,
 351                         par_.getInset(pos)->descent());
 352                 return;
 353         }
 354
 355         // usual characters, no insets
 356         char_type const c = par_.getChar(pos);
 357
 358         // special case languages
 359         std::string const & lang = orig_font.language()->lang();
 360         bool const hebrew = lang == "hebrew";
 361         bool const arabic = lang == "arabic" &&
 362                 (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 363                 lyxrc.font_norm_type == LyXRC::ISO_10646_1);
 364
 365         // draw as many chars as we can
 366         if ((!hebrew && !arabic)
 367                 || (hebrew && !Encodings::isComposeChar_hebrew(c))
 368                 || (arabic && !Encodings::isComposeChar_arabic(c))) {
 369                 paintChars(vpos, orig_font, hebrew, arabic);
 370         } else if (hebrew) {
 371                 paintHebrewComposeChar(vpos, orig_font);
 372         } else if (arabic) {
 373                 paintArabicComposeChar(vpos, orig_font);
 374         }
 375
 376         paintForeignMark(orig_x, orig_font);
 377 }
 378
 379
 380 void RowPainter::paintChangeBar()
 381 {
 382         pos_type const start = row_.pos();
 383         pos_type const end = row_.endpos();
 384
 385         if (start == end || !par_.isChanged(start, end))
 386                 return;
 387
 388         int const height = text_.isLastRow(pit_, row_)
 389                 ? row_.ascent()
 390                 : row_.height();
 391
 392         pain_.fillRectangle(5, yo_ - row_.ascent(), 3, height, LColor::changebar);
 393 }
 394
 395
 396 void RowPainter::paintAppendix()
 397 {
 398         if (!par_.params().appendix())
 399                 return;
 400
 401         int y = yo_ - row_.ascent();
 402
 403         if (par_.params().startOfAppendix())
 404                 y += 2 * defaultRowHeight();
 405
 406         pain_.line(1, y, 1, yo_ + row_.height(), LColor::appendix);
 407         pain_.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), LColor::appendix);
 408 }
 409
 410
 411 void RowPainter::paintDepthBar()
 412 {
 413         depth_type const depth = par_.getDepth();
 414
 415         if (depth <= 0)
 416                 return;
 417
 418         depth_type prev_depth = 0;
 419         if (!text_.isFirstRow(pit_, row_)) {
 420                 pit_type pit2 = pit_;
 421                 if (row_.pos() == 0)
 422                         --pit2;
 423                 prev_depth = pars_[pit2].getDepth();
 424         }
 425
 426         depth_type next_depth = 0;
 427         if (!text_.isLastRow(pit_, row_)) {
 428                 pit_type pit2 = pit_;
 429                 if (row_.endpos() >= pars_[pit2].size())
 430                         ++pit2;
 431                 next_depth = pars_[pit2].getDepth();
 432         }
 433
 434         for (depth_type i = 1; i <= depth; ++i) {
 435                 int const w = nestMargin() / 5;
 436                 int x = int(xo_) + w * i;
 437                 // only consider the changebar space if we're drawing outermost text
 438                 if (text_.isMainText())
 439                         x += changebarMargin();
 440
 441                 int const starty = yo_ - row_.ascent();
 442                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 443
 444                 pain_.line(x, starty, x, starty + h, LColor::depthbar);
 445
 446                 if (i > prev_depth)
 447                         pain_.fillRectangle(x, starty, w, 2, LColor::depthbar);
 448                 if (i > next_depth)
 449                         pain_.fillRectangle(x, starty + h, w, 2, LColor::depthbar);
 450         }
 451 }
 452
 453
 454 int RowPainter::paintAppendixStart(int y)
 455 {
 456         LyXFont pb_font;
 457         pb_font.setColor(LColor::appendix);
 458         pb_font.decSize();
 459
 460         int w = 0;
 461         int a = 0;
 462         int d = 0;
 463
 464         docstring const label = _("Appendix");
 465         theFontMetrics(pb_font).rectText(label, w, a, d);
 466
 467         int const text_start = int(xo_ + (width_ - w) / 2);
 468         int const text_end = text_start + w;
 469
 470         pain_.rectText(text_start, y + d, label, pb_font, LColor::none, LColor::none);
 471
 472         pain_.line(int(xo_ + 1), y, text_start, y, LColor::appendix);
 473         pain_.line(text_end, y, int(xo_ + width_ - 2), y, LColor::appendix);
 474
 475         return 3 * defaultRowHeight();
 476 }
 477
 478
 479 void RowPainter::paintFirst()
 480 {
 481         ParagraphParameters const & parparams = par_.params();
 482
 483         int y_top = 0;
 484
 485         // start of appendix?
 486         if (parparams.startOfAppendix())
 487                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 488
 489         Buffer const & buffer = *bv_.buffer();
 490
 491         LyXLayout_ptr const & layout = par_.layout();
 492
 493         if (buffer.params().paragraph_separation == BufferParams::PARSEP_SKIP) {
 494                 if (pit_ != 0) {
 495                         if (layout->latextype == LATEX_PARAGRAPH
 496                                 && !par_.getDepth()) {
 497                                 y_top += buffer.params().getDefSkip().inPixels(bv_);
 498                         } else {
 499                                 LyXLayout_ptr const & playout = pars_[pit_ - 1].layout();
 500                                 if (playout->latextype == LATEX_PARAGRAPH
 501                                         && !pars_[pit_ - 1].getDepth()) {
 502                                         // is it right to use defskip here, too? (AS)
 503                                         y_top += buffer.params().getDefSkip().inPixels(bv_);
 504                                 }
 505                         }
 506                 }
 507         }
 508
 509         bool const is_rtl = text_.isRTL(par_);
 510         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 511         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << std::endl;
 512
 513         // should we print a label?
 514         if (layout->labeltype >= LABEL_STATIC
 515             && (layout->labeltype != LABEL_STATIC
 516                       || layout->latextype != LATEX_ENVIRONMENT
 517                       || is_seq)) {
 518
 519                 LyXFont const font = getLabelFont();
 520                 FontMetrics const & fm = theFontMetrics(font);
 521
 522                 docstring const str = par_.getLabelstring();
 523                 if (!str.empty()) {
 524                         double x = x_;
 525
 526                         // this is special code for the chapter layout. This is
 527                         // printed in an extra row and has a pagebreak at
 528                         // the top.
 529                         if (layout->counter == "chapter") {
 530                                 double spacing_val = 1.0;
 531                                 if (!parparams.spacing().isDefault()) {
 532                                         spacing_val = parparams.spacing().getValue();
 533                                 } else {
 534                                         spacing_val = buffer.params().spacing().getValue();
 535                                 }
 536
 537                                 int const labeladdon = int(fm.maxHeight() * layout->spacing.getValue() * spacing_val);
 538
 539                                 int const maxdesc = int(fm.maxDescent() * layout->spacing.getValue() * spacing_val)
 540                                         + int(layout->parsep) * defaultRowHeight();
 541
 542                                 if (is_rtl) {
 543                                         x = width_ - leftMargin() -
 544                                                 fm.width(str);
 545                                 }
 546
 547                                 pain_.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 548                         } else {
 549                                 // FIXME UNICODE
 550                                 docstring lab = from_utf8(layout->labelsep);
 551                                 if (is_rtl) {
 552                                         x = width_ - leftMargin()
 553                                                 + fm.width(lab);
 554                                 } else {
 555                                         x = x_ - fm.width(lab)
 556                                                 - fm.width(str);
 557                                 }
 558
 559                                 pain_.text(int(x), yo_, str, font);
 560                         }
 561                 }
 562
 563         // the labels at the top of an environment.
 564         // More or less for bibliography
 565         } else if (is_seq &&
 566                 (layout->labeltype == LABEL_TOP_ENVIRONMENT ||
 567                 layout->labeltype == LABEL_BIBLIO ||
 568                 layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 569                 LyXFont font = getLabelFont();
 570                 if (!par_.getLabelstring().empty()) {
 571                         docstring const str = par_.getLabelstring();
 572                         double spacing_val = 1.0;
 573                         if (!parparams.spacing().isDefault())
 574                                 spacing_val = parparams.spacing().getValue();
 575                         else
 576                                 spacing_val = buffer.params().spacing().getValue();
 577
 578                         FontMetrics const & fm = theFontMetrics(font);
 579
 580                         int const labeladdon = int(fm.maxHeight()
 581                                 * layout->spacing.getValue() * spacing_val);
 582
 583                         int maxdesc =
 584                                 int(fm.maxDescent() * layout->spacing.getValue() * spacing_val
 585                                 + (layout->labelbottomsep * defaultRowHeight()));
 586
 587                         double x = x_;
 588                         if (layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 589                                 if (is_rtl)
 590                                         x = leftMargin();
 591                                 x += (width_ - text_.rightMargin(par_) - leftMargin()) / 2;
 592                                 x -= fm.width(str) / 2;
 593                         } else if (is_rtl) {
 594                                 x = width_ - leftMargin() -     fm.width(str);
 595                         }
 596                         pain_.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 597                 }
 598         }
 599 }
 600
 601
 602 void RowPainter::paintLast()
 603 {
 604         bool const is_rtl = text_.isRTL(par_);
 605         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 606
 607         // draw an endlabel
 608         switch (endlabel) {
 609         case END_LABEL_BOX:
 610         case END_LABEL_FILLED_BOX: {
 611                 LyXFont const font = getLabelFont();
 612                 FontMetrics const & fm = theFontMetrics(font);
 613                 int const size = int(0.75 * fm.maxAscent());
 614                 int const y = yo_ - size;
 615                 int x = is_rtl ? nestMargin() + changebarMargin() : width_ - size;
 616
 617                 if (width_ - int(row_.width()) <= size)
 618                         x += (size - width_ + row_.width() + 1) * (is_rtl ? -1 : 1);
 619
 620                 if (endlabel == END_LABEL_BOX)
 621                         pain_.rectangle(x, y, size, size, LColor::eolmarker);
 622                 else
 623                         pain_.fillRectangle(x, y, size, size, LColor::eolmarker);
 624                 break;
 625         }
 626
 627         case END_LABEL_STATIC: {
 628                 LyXFont font = getLabelFont();
 629                 FontMetrics const & fm = theFontMetrics(font);
 630                 docstring const & str = par_.layout()->endlabelstring();
 631                 double const x = is_rtl ?
 632                         x_ - fm.width(str)
 633                         : - text_.rightMargin(par_) - row_.width();
 634                 pain_.text(int(x), yo_, str, font);
 635                 break;
 636         }
 637
 638         case END_LABEL_NO_LABEL:
 639                 break;
 640         }
 641 }
 642
 643
 644 void RowPainter::paintText()
 645 {
 646         pos_type const end = row_.endpos();
 647         pos_type body_pos = par_.beginOfBody();
 648         if (body_pos > 0 &&
 649                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 650                 body_pos = 0;
 651         }
 652
 653         LyXLayout_ptr const & layout = par_.layout();
 654
 655         bool running_strikeout = false;
 656         bool is_struckout = false;
 657         int last_strikeout_x = 0;
 658
 659         // Use font span to speed things up, see below
 660         FontSpan font_span;
 661         LyXFont font;
 662
 663         for (pos_type vpos = row_.pos(); vpos < end; ) {
 664                 if (x_ > bv_.workWidth())
 665                         break;
 666
 667                 pos_type const pos = text_.bidi.vis2log(vpos);
 668
 669                 if (pos >= par_.size()) {
 670                         ++vpos;
 671                         continue;
 672                 }
 673
 674                 // Use font span to speed things up, see above
 675                 if (vpos < font_span.first || vpos > font_span.last) {
 676                         font_span = par_.fontSpan(vpos);
 677                         font = text_.getFont(par_, vpos);
 678                 }
 679
 680                 const int width_pos =
 681                         text_.singleWidth(par_, pos, par_.getChar(pos), font);
 682
 683                 if (x_ + width_pos < 0) {
 684                         x_ += width_pos;
 685                         ++vpos;
 686                         continue;
 687                 }
 688
 689                 is_struckout = par_.isDeleted(pos);
 690
 691                 if (is_struckout && !running_strikeout) {
 692                         running_strikeout = true;
 693                         last_strikeout_x = int(x_);
 694                 }
 695
 696                 bool const highly_editable_inset = par_.isInset(pos)
 697                         && isHighlyEditableInset(par_.getInset(pos));
 698
 699                 // If we reach the end of a struck out range, paint it.
 700                 // We also don't paint across things like tables
 701                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 702                         // Calculate 1/3 height of the buffer's default font
 703                         FontMetrics const & fm
 704                                 = theFontMetrics(bv_.buffer()->params().getFont());
 705                         int const middle = yo_ - fm.maxAscent() / 3;
 706                         pain_.line(last_strikeout_x, middle, int(x_), middle,
 707                                 LColor::strikeout, Painter::line_solid, Painter::line_thin);
 708                         running_strikeout = false;
 709                 }
 710
 711                 if (body_pos > 0 && pos == body_pos - 1) {
 712                         // FIXME UNICODE
 713                         int const lwidth = theFontMetrics(getLabelFont())
 714                                 .width(from_utf8(layout->labelsep));
 715
 716                         x_ += label_hfill_ + lwidth - width_pos;
 717                 }
 718
 719                 if (par_.isHfill(pos)) {
 720                         x_ += 1;
 721
 722                         int const y0 = yo_;
 723                         int const y1 = y0 - defaultRowHeight() / 2;
 724
 725                         pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 726
 727                         if (hfillExpansion(par_, row_, pos)) {
 728                                 int const y2 = (y0 + y1) / 2;
 729
 730                                 if (pos >= body_pos) {
 731                                         pain_.line(int(x_), y2, int(x_ + hfill_), y2,
 732                                                   LColor::added_space,
 733                                                   Painter::line_onoffdash);
 734                                         x_ += hfill_;
 735                                 } else {
 736                                         pain_.line(int(x_), y2, int(x_ + label_hfill_), y2,
 737                                                   LColor::added_space,
 738                                                   Painter::line_onoffdash);
 739                                         x_ += label_hfill_;
 740                                 }
 741                                 pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 742                         }
 743                         x_ += 2;
 744                         ++vpos;
 745                 } else if (par_.isSeparator(pos)) {
 746                         x_ += width_pos;
 747                         if (pos >= body_pos)
 748                                 x_ += separator_;
 749                         ++vpos;
 750                 } else {
 751                         paintFromPos(vpos);
 752                 }
 753         }
 754
 755         // if we reach the end of a struck out range, paint it
 756         if (running_strikeout) {
 757                 // calculate 1/3 height of the buffer's default font
 758                 FontMetrics const & fm
 759                         = theFontMetrics(bv_.buffer()->params().getFont());
 760                 int const middle = yo_ - fm.maxAscent() / 3;
 761                 pain_.line(last_strikeout_x, middle, int(x_), middle,
 762                         LColor::strikeout, Painter::line_solid, Painter::line_thin);
 763                 running_strikeout = false;
 764         }
 765 }
 766
 767
 768 size_type calculateRowSignature(Row const & row, Paragraph const & par,
 769         int x, int y)
 770 {
 771         boost::crc_32_type crc;
 772         for (pos_type i = row.pos(); i < row.endpos(); ++i) {
 773                 const unsigned char b[] = { par.getChar(i) };
 774                 crc.process_bytes(b, 1);
 775         }
 776         const unsigned char b[] = { x, y, row.width() };
 777         crc.process_bytes(b, 3);
 778         return crc.checksum();
 779 }
 780
 781
 782 bool CursorOnRow(PainterInfo & pi, pit_type const pit,
 783         RowList::const_iterator rit, LyXText const & text)
 784 {
 785         // Is there a cursor on this row (or inside inset on row)
 786         LCursor & cur = pi.base.bv->cursor();
 787         for (size_type d = 0; d < cur.depth(); ++d) {
 788                 CursorSlice const & sl = cur[d];
 789                 if (sl.text() == &text
 790                     && sl.pit() == pit
 791                     && sl.pos() >= rit->pos()
 792                     && sl.pos() <= rit->endpos())
 793                         return true;
 794         }
 795         return false;
 796 }
 797
 798
 799 bool innerCursorOnRow(PainterInfo & pi, pit_type pit,
 800         RowList::const_iterator rit, LyXText const & text)
 801 {
 802         // Is there a cursor inside an inset on this row, and is this inset
 803         // the only "character" on this row
 804         LCursor & cur = pi.base.bv->cursor();
 805         if (rit->pos() + 1 != rit->endpos())
 806                 return false;
 807         for (size_type d = 0; d < cur.depth(); d++) {
 808                 CursorSlice const & sl = cur[d];
 809                 if (sl.text() == &text
 810                     && sl.pit() == pit
 811                     && sl.pos() == rit->pos())
 812                         return d < cur.depth() - 1;
 813         }
 814         return false;
 815 }
 816
 817
 818 void paintPar
 819         (PainterInfo & pi, LyXText const & text, pit_type pit, int x, int y,
 820          bool repaintAll)
 821 {
 822 //      lyxerr << "  paintPar: pit: " << pit << " at y: " << y << endl;
 823         static NullPainter nop;
 824         static PainterInfo nullpi(pi.base.bv, nop);
 825         int const ww = pi.base.bv->workHeight();
 826
 827         pi.base.bv->coordCache().parPos()[&text][pit] = Point(x, y);
 828
 829         Paragraph const & par = text.paragraphs()[pit];
 830         if (par.rows().empty())
 831                 return;
 832
 833         RowList::const_iterator const rb = par.rows().begin();
 834         RowList::const_iterator const re = par.rows().end();
 835
 836         y -= rb->ascent();
 837         size_type rowno = 0;
 838         for (RowList::const_iterator rit = rb; rit != re; ++rit, ++rowno) {
 839                 y += rit->ascent();
 840                 // Allow setting of refreshInside for nested insets in
 841                 // this row only
 842                 bool tmp = refreshInside;
 843
 844                 // Row signature; has row changed since last paint?
 845                 size_type const row_sig = calculateRowSignature(*rit, par, x, y);
 846                 bool row_has_changed = par.rowSignature()[rowno] != row_sig;
 847
 848                 bool cursor_on_row = CursorOnRow(pi, pit, rit, text);
 849                 bool in_inset_alone_on_row = innerCursorOnRow(pi, pit, rit,
 850                         text);
 851
 852                 // If this is the only object on the row, we can make it wide
 853                 for (pos_type i = rit->pos() ; i != rit->endpos(); ++i) {
 854                         InsetBase const * const in = par.getInset(i);
 855                         if (in) {
 856                                 InsetText const * const t = in->asTextInset();
 857                                 if (t)
 858                                         t->Wide() = in_inset_alone_on_row;
 859                         }
 860                 }
 861
 862                 // If selection is on, the current row signature differs
 863                 // from cache, or cursor is inside an inset _on this row_,
 864                 // then paint the row
 865                 if (repaintAll || row_has_changed || cursor_on_row) {
 866                         // Add to row signature cache
 867                         par.rowSignature()[rowno] = row_sig;
 868
 869                         bool const inside = (y + rit->descent() >= 0
 870                                        && y - rit->ascent() < ww);
 871                         RowPainter rp(inside ? pi : nullpi, text, pit, *rit, x, y);
 872                         // Clear background of this row
 873                         // (if paragraph background was not cleared)
 874                         if (!repaintAll &&
 875                             (!in_inset_alone_on_row || row_has_changed)) {
 876                                 pi.pain.fillRectangle(x, y - rit->ascent(),
 877                                     text.maxwidth_, rit->height(),
 878                                     text.backgroundColor());
 879                                 // If outer row has changed, force nested
 880                                 // insets to repaint completely
 881                                 if (row_has_changed)
 882                                         refreshInside = true;
 883                         }
 884
 885                         // Instrumentation for testing row cache (see also
 886                         // 12 lines lower):
 887                         if (text.isMainText())
 888                                 lyxerr[Debug::PAINTING] << "#";
 889                         else
 890                                 lyxerr[Debug::PAINTING] << "[" <<
 891                                     repaintAll << row_has_changed <<
 892                                     cursor_on_row << "]";
 893                         rp.paintAppendix();
 894                         rp.paintDepthBar();
 895                         rp.paintChangeBar();
 896                         if (rit == rb)
 897                                 rp.paintFirst();
 898                         if (rit + 1 == re)
 899                                 rp.paintLast();
 900                         rp.paintText();
 901                 }
 902                 y += rit->descent();
 903                 // Restore, see above
 904                 refreshInside = tmp;
 905         }
 906         lyxerr[Debug::PAINTING] << "." << endl;
 907 }
 908
 909 } // namespace anon
 910
 911
 912 void paintText(BufferView & bv, ViewMetricsInfo const & vi,
 913                Painter & pain)
 914 {
 915         LyXText & text = bv.buffer()->text();
 916         bool const select = bv.cursor().selection();
 917
 918         PainterInfo pi(const_cast<BufferView *>(&bv), pain);
 919         // Should the whole screen, including insets, be refreshed?
 920         bool repaintAll = select || !vi.singlepar;
 921
 922         if (repaintAll) {
 923                 // Clear background (if not delegated to rows)
 924                 pain.fillRectangle(0, vi.y1, bv.workWidth(), vi.y2 - vi.y1,
 925                         text.backgroundColor());
 926         }
 927         if (select) {
 928                 text.drawSelection(pi, 0, 0);
 929         }
 930
 931         int yy = vi.y1;
 932         // draw contents
 933         for (pit_type pit = vi.p1; pit <= vi.p2; ++pit) {
 934                 refreshInside = repaintAll;
 935                 Paragraph const & par = text.getPar(pit);
 936                 yy += par.ascent();
 937                 paintPar(pi, text, pit, 0, yy, repaintAll);
 938                 yy += par.descent();
 939         }
 940
 941         // Cache one paragraph above and one below
 942         // Note MV: this cannot be suppressed even for singlepar.
 943         // Try viewing the User Guide Mobius figure
 944
 945         if (vi.p1 > 0) {
 946                 text.redoParagraph(vi.p1 - 1);
 947                 bv.coordCache().parPos()[&text][vi.p1 - 1] =
 948                         Point(0, vi.y1 - text.getPar(vi.p1 - 1).descent());
 949         }
 950
 951         if (vi.p2 < pit_type(text.paragraphs().size()) - 1) {
 952                 text.redoParagraph(vi.p2 + 1);
 953                 bv.coordCache().parPos()[&text][vi.p2 + 1] =
 954                         Point(0, vi.y2 + text.getPar(vi.p2 + 1).ascent());
 955         }
 956
 957         // and grey out above (should not happen later)
 958 //      lyxerr << "par ascent: " << text.getPar(vi.p1).ascent() << endl;
 959         if (vi.y1 > 0 && !vi.singlepar)
 960                 pain.fillRectangle(0, 0, bv.workWidth(), vi.y1, LColor::bottomarea);
 961
 962         // and possibly grey out below
 963 //      lyxerr << "par descent: " << text.getPar(vi.p1).ascent() << endl;
 964         if (vi.y2 < bv.workHeight() && !vi.singlepar)
 965                 pain.fillRectangle(0, vi.y2, bv.workWidth(), bv.workHeight() - vi.y2, LColor::bottomarea);
 966 }
 967
 968
 969 void paintTextInset(LyXText const & text, PainterInfo & pi, int x, int y)
 970 {
 971 //      lyxerr << "  paintTextInset: y: " << y << endl;
 972
 973         y -= text.getPar(0).ascent();
 974         // This flag can not be set from within same inset:
 975         bool repaintAll = refreshInside;
 976         for (int pit = 0; pit < int(text.paragraphs().size()); ++pit) {
 977                 y += text.getPar(pit).ascent();
 978                 paintPar(pi, text, pit, x, y, repaintAll);
 979                 y += text.getPar(pit).descent();
 980         }
 981 }
 982
 983
 984 } // namespace lyx