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