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 "ParagraphMetrics.h"
  31 #include "paragraph_funcs.h"
  32 #include "ParagraphParameters.h"
  33 #include "TextMetrics.h"
  34 #include "vspace.h"
  35
  36 #include "frontends/FontMetrics.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::FontMetrics;
  50
  51 using std::endl;
  52 using std::max;
  53 using std::string;
  54
  55
  56 namespace {
  57
  58 /// Flag: do a full redraw of inside text of inset
  59 /// Working variable indicating a full screen refresh
  60 bool refreshInside;
  61
  62 /**
  63  * A class used for painting an individual row of text.
  64  */
  65 class RowPainter {
  66 public:
  67         /// initialise and run painter
  68         RowPainter(PainterInfo & pi, LyXText const & text,
  69                 pit_type pit, Row const & row, int x, int y);
  70
  71         // paint various parts
  72         void paintAppendix();
  73         void paintDepthBar();
  74         void paintChangeBar();
  75         void paintFirst();
  76         void paintLast();
  77         void paintText();
  78         int maxWidth() { return max_width_; }
  79
  80 private:
  81         void paintForeignMark(double orig_x, LyXFont const & font, int desc = 0);
  82         void paintHebrewComposeChar(pos_type & vpos, LyXFont const & font);
  83         void paintArabicComposeChar(pos_type & vpos, LyXFont const & font);
  84         void paintChars(pos_type & vpos, LyXFont const & font,
  85                         bool hebrew, bool arabic);
  86         int paintAppendixStart(int y);
  87         void paintFromPos(pos_type & vpos);
  88         void paintInset(pos_type const pos, LyXFont const & font);
  89
  90         /// return left margin
  91         int leftMargin() const;
  92
  93         /// return the label font for this row
  94         LyXFont const getLabelFont() const;
  95
  96         /// bufferview to paint on
  97         BufferView & bv_;
  98
  99         /// Painter to use
 100         Painter & pain_;
 101
 102         /// LyXText for the row
 103         LyXText const & text_;
 104         TextMetrics & text_metrics_;
 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         ParagraphMetrics const & pm_;
 114         int max_width_;
 115
 116         /// is row erased? (change tracking)
 117         bool erased_;
 118
 119         // Looks ugly - is
 120         double const xo_;
 121         int const yo_;    // current baseline
 122         double x_;
 123         int width_;
 124         double separator_;
 125         double hfill_;
 126         double label_hfill_;
 127 };
 128
 129
 130 RowPainter::RowPainter(PainterInfo & pi,
 131         LyXText const & text, pit_type pit, Row const & row, int x, int y)
 132         : bv_(*pi.base.bv), pain_(pi.pain), text_(text),
 133           text_metrics_(pi.base.bv->textMetrics(&text)),
 134           pars_(text.paragraphs()),
 135           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
 136           pm_(text_metrics_.parMetrics(pit)),
 137           max_width_(bv_.workWidth()),
 138           erased_(pi.erased_),
 139           xo_(x), yo_(y), width_(text_metrics_.width())
 140 {
 141         RowMetrics m = text_metrics_.computeRowMetrics(pit_, row_);
 142         x_ = m.x + xo_;
 143
 144         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
 145         //row_.dump();
 146
 147         separator_ = m.separator;
 148         hfill_ = m.hfill;
 149         label_hfill_ = m.label_hfill;
 150
 151         BOOST_ASSERT(pit >= 0);
 152         BOOST_ASSERT(pit < int(text.paragraphs().size()));
 153 }
 154
 155
 156 LyXFont const RowPainter::getLabelFont() const
 157 {
 158         return text_.getLabelFont(*bv_.buffer(), par_);
 159 }
 160
 161
 162 int RowPainter::leftMargin() const
 163 {
 164         return text_.leftMargin(*bv_.buffer(), max_width_, pit_, row_.pos());
 165 }
 166
 167
 168 // If you want to debug inset metrics uncomment the following line:
 169 // #define DEBUG_METRICS
 170 // This draws green lines around each inset.
 171
 172
 173 void RowPainter::paintInset(pos_type const pos, LyXFont const & font)
 174 {
 175         InsetBase const * inset = par_.getInset(pos);
 176         BOOST_ASSERT(inset);
 177         PainterInfo pi(const_cast<BufferView *>(&bv_), pain_);
 178         // FIXME: We should always use font, see documentation of
 179         // noFontChange() in insetbase.h.
 180         pi.base.font = inset->noFontChange() ?
 181                 bv_.buffer()->params().getFont() :
 182                 font;
 183         pi.ltr_pos = (text_.bidi.level(pos) % 2 == 0);
 184         pi.erased_ = erased_ || par_.isDeleted(pos);
 185 #ifdef DEBUG_METRICS
 186         int const x1 = int(x_);
 187 #endif
 188         bv_.coordCache().insets().add(inset, int(x_), yo_);
 189         InsetText const * const in = inset->asTextInset();
 190         // non-wide insets are painted completely. Recursive
 191         bool tmp = refreshInside;
 192         if (!in || !in->wide()) {
 193                 refreshInside = true;
 194                 if (lyxerr.debugging(Debug::PAINTING)) {
 195                         lyxerr << endl << "Paint inset fully" << endl;
 196                 }
 197         }
 198         if (refreshInside)
 199                 inset->drawSelection(pi, int(x_), yo_);
 200         inset->draw(pi, int(x_), yo_);
 201         refreshInside = tmp;
 202         x_ += inset->width();
 203 #ifdef DEBUG_METRICS
 204         Dimension dim;
 205         BOOST_ASSERT(max_witdh_ > 0);
 206         int right_margin = text_metrics_.rightMargin(pm_);
 207         int const w = max_witdh_ - leftMargin() - right_margin;
 208         MetricsInfo mi(&bv_, font, w);
 209         inset->metrics(mi, dim);
 210         if (inset->width() > dim.wid)
 211                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 212                        << " draw width " << inset->width()
 213                        << "> metrics width " << dim.wid << "." << std::endl;
 214         if (inset->ascent() > dim.asc)
 215                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 216                        << " draw ascent " << inset->ascent()
 217                        << "> metrics ascent " << dim.asc << "." << std::endl;
 218         if (inset->descent() > dim.des)
 219                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 220                        << " draw ascent " << inset->descent()
 221                        << "> metrics descent " << dim.des << "." << std::endl;
 222         BOOST_ASSERT(inset->width() <= dim.wid);
 223         BOOST_ASSERT(inset->ascent() <= dim.asc);
 224         BOOST_ASSERT(inset->descent() <= dim.des);
 225         int const x2 = x1 + dim.wid;
 226         int const y1 = yo_ + dim.des;
 227         int const y2 = yo_ - dim.asc;
 228         pi.pain.line(x1, y1, x1, y2, LColor::green);
 229         pi.pain.line(x1, y1, x2, y1, LColor::green);
 230         pi.pain.line(x2, y1, x2, y2, LColor::green);
 231         pi.pain.line(x1, y2, x2, y2, LColor::green);
 232 #endif
 233 }
 234
 235
 236 void RowPainter::paintHebrewComposeChar(pos_type & vpos, LyXFont const & font)
 237 {
 238         pos_type pos = text_.bidi.vis2log(vpos);
 239
 240         docstring str;
 241
 242         // first char
 243         char_type c = par_.getChar(pos);
 244         str += c;
 245         ++vpos;
 246
 247         int const width = theFontMetrics(font).width(c);
 248         int dx = 0;
 249
 250         for (pos_type i = pos - 1; i >= 0; --i) {
 251                 c = par_.getChar(i);
 252                 if (!Encodings::isComposeChar_hebrew(c)) {
 253                         if (isPrintableNonspace(c)) {
 254                                 int const width2 = text_.singleWidth(par_, i, c,
 255                                         text_.getFont(*bv_.buffer(), par_, i));
 256                                 // FIXME UNICODE
 257                                 // This does not work anymore, and non-ascii
 258                                 // characters in source files are forbidden
 259                                 // anyway.
 260                                 // dalet / resh
 261                                 dx = (c == 'ø' || c == 'ã')
 262                                         ? width2 - width
 263                                         : (width2 - width) / 2;
 264                         }
 265                         break;
 266                 }
 267         }
 268
 269         // Draw nikud
 270         // FIXME UNICODE
 271         pain_.text(int(x_) + dx, yo_, str, font);
 272 }
 273
 274
 275 void RowPainter::paintArabicComposeChar(pos_type & vpos, LyXFont const & font)
 276 {
 277         pos_type pos = text_.bidi.vis2log(vpos);
 278         docstring str;
 279
 280         // first char
 281         char_type c = par_.getChar(pos);
 282         c = par_.transformChar(c, pos);
 283         str += c;
 284         ++vpos;
 285
 286         int const width = theFontMetrics(font).width(c);
 287         int dx = 0;
 288
 289         for (pos_type i = pos - 1; i >= 0; --i) {
 290                 c = par_.getChar(i);
 291                 if (!Encodings::isComposeChar_arabic(c)) {
 292                         if (isPrintableNonspace(c)) {
 293                                 int const width2 = text_.singleWidth(par_, i, c,
 294                                                 text_.getFont(*bv_.buffer(), par_, i));
 295                                 dx = (width2 - width) / 2;
 296                         }
 297                         break;
 298                 }
 299         }
 300         // Draw nikud
 301         pain_.text(int(x_) + dx, yo_, str, font);
 302 }
 303
 304
 305 void RowPainter::paintChars(pos_type & vpos, LyXFont const & font,
 306                             bool hebrew, bool arabic)
 307 {
 308         // This method takes up 70% of time when typing
 309         pos_type pos = text_.bidi.vis2log(vpos);
 310         pos_type const end = row_.endpos();
 311         FontSpan const font_span = par_.fontSpan(pos);
 312         Change::Type const prev_change = par_.lookupChange(pos).type;
 313
 314         // first character
 315         std::vector<char_type> str;
 316         str.reserve(100);
 317         str.push_back(par_.getChar(pos));
 318
 319         if (arabic) {
 320                 char_type c = str[0];
 321                 str[0] = par_.transformChar(c, pos);
 322         }
 323
 324         // collect as much similar chars as we can
 325         for (++vpos ; vpos < end ; ++vpos) {
 326                 pos = text_.bidi.vis2log(vpos);
 327                 if (pos < font_span.first || pos > font_span.last)
 328                         break;
 329
 330                 if (prev_change != par_.lookupChange(pos).type)
 331                         break;
 332
 333                 char_type c = par_.getChar(pos);
 334
 335                 if (!isPrintableNonspace(c))
 336                         break;
 337
 338                 // We have to draw hebrew characters one by one, since we
 339                 // apply our own bidi algorithm, and qt would reverse the
 340                 // order of characters in words again (bug 3040).
 341                 // The same applys for arabic (see below).
 342                 if (hebrew)
 343                         break;
 344
 345                 /* FIXME: these checks are irrelevant, since 'arabic' and
 346                  * 'hebrew' alone are already going to trigger a break.
 347                  * The encodings used by isComposeChar_arabic and
 348                  * isComposeChar_hebrew are incorrect (probably iso8859-8 and
 349                  * iso8859-6), they also have to be adapted to Unicode.
 350                  * However, this should not be removed completely, because
 351                  * if an alternative solution is found which allows grouping
 352                  * of arabic and hebrew characters, then these breaks may have
 353                  * to be re-applied.
 354                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 355
 356                 if (arabic && Encodings::isComposeChar_arabic(c))
 357                         break;
 358
 359                 if (hebrew && Encodings::isComposeChar_hebrew(c))
 360                         break;
 361                 */
 362
 363                 if (arabic) {
 364                         c = par_.transformChar(c, pos);
 365                         break;
 366                 }
 367
 368                 str.push_back(c);
 369         }
 370
 371         docstring s(&str[0], str.size());
 372
 373         if (prev_change != Change::UNCHANGED) {
 374                 LyXFont copy(font);
 375                 if (prev_change == Change::DELETED) {
 376                         copy.setColor(LColor::strikeout);
 377                 } else if (prev_change == Change::INSERTED) {
 378                         copy.setColor(LColor::newtext);
 379                 }
 380                 x_ += pain_.text(int(x_), yo_, s, copy);
 381         } else {
 382                 x_ += pain_.text(int(x_), yo_, s, font);
 383         }
 384 }
 385
 386
 387 void RowPainter::paintForeignMark(double orig_x, LyXFont const & font, int desc)
 388 {
 389         if (!lyxrc.mark_foreign_language)
 390                 return;
 391         if (font.language() == latex_language)
 392                 return;
 393         if (font.language() == bv_.buffer()->params().language)
 394                 return;
 395
 396         int const y = yo_ + 1 + desc;
 397         pain_.line(int(orig_x), y, int(x_), y, LColor::language);
 398 }
 399
 400
 401 void RowPainter::paintFromPos(pos_type & vpos)
 402 {
 403         pos_type const pos = text_.bidi.vis2log(vpos);
 404         LyXFont orig_font = text_.getFont(*bv_.buffer(), par_, pos);
 405
 406         double const orig_x = x_;
 407
 408         if (par_.isInset(pos)) {
 409                 paintInset(pos, orig_font);
 410                 ++vpos;
 411                 paintForeignMark(orig_x, orig_font,
 412                         par_.getInset(pos)->descent());
 413                 return;
 414         }
 415
 416         // usual characters, no insets
 417         char_type const c = par_.getChar(pos);
 418
 419         // special case languages
 420         std::string const & lang = orig_font.language()->lang();
 421         bool const hebrew = lang == "hebrew";
 422         bool const arabic = lang == "arabic" &&
 423                 (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
 424                 lyxrc.font_norm_type == LyXRC::ISO_10646_1);
 425
 426         // draw as many chars as we can
 427         if ((!hebrew && !arabic)
 428                 || (hebrew && !Encodings::isComposeChar_hebrew(c))
 429                 || (arabic && !Encodings::isComposeChar_arabic(c))) {
 430                 paintChars(vpos, orig_font, hebrew, arabic);
 431         } else if (hebrew) {
 432                 paintHebrewComposeChar(vpos, orig_font);
 433         } else if (arabic) {
 434                 paintArabicComposeChar(vpos, orig_font);
 435         }
 436
 437         paintForeignMark(orig_x, orig_font);
 438 }
 439
 440
 441 void RowPainter::paintChangeBar()
 442 {
 443         pos_type const start = row_.pos();
 444         pos_type end = row_.endpos();
 445
 446         if (par_.size() == end) {
 447                 // this is the last row of the paragraph;
 448                 // thus, we must also consider the imaginary end-of-par character
 449                 end++;
 450         }
 451
 452         if (start == end || !par_.isChanged(start, end))
 453                 return;
 454
 455         int const height = text_.isLastRow(pit_, row_)
 456                 ? row_.ascent()
 457                 : row_.height();
 458
 459         pain_.fillRectangle(5, yo_ - row_.ascent(), 3, height, LColor::changebar);
 460 }
 461
 462
 463 void RowPainter::paintAppendix()
 464 {
 465         if (!par_.params().appendix())
 466                 return;
 467
 468         int y = yo_ - row_.ascent();
 469
 470         if (par_.params().startOfAppendix())
 471                 y += 2 * defaultRowHeight();
 472
 473         pain_.line(1, y, 1, yo_ + row_.height(), LColor::appendix);
 474         pain_.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), LColor::appendix);
 475 }
 476
 477
 478 void RowPainter::paintDepthBar()
 479 {
 480         depth_type const depth = par_.getDepth();
 481
 482         if (depth <= 0)
 483                 return;
 484
 485         depth_type prev_depth = 0;
 486         if (!text_.isFirstRow(pit_, row_)) {
 487                 pit_type pit2 = pit_;
 488                 if (row_.pos() == 0)
 489                         --pit2;
 490                 prev_depth = pars_[pit2].getDepth();
 491         }
 492
 493         depth_type next_depth = 0;
 494         if (!text_.isLastRow(pit_, row_)) {
 495                 pit_type pit2 = pit_;
 496                 if (row_.endpos() >= pars_[pit2].size())
 497                         ++pit2;
 498                 next_depth = pars_[pit2].getDepth();
 499         }
 500
 501         for (depth_type i = 1; i <= depth; ++i) {
 502                 int const w = nestMargin() / 5;
 503                 int x = int(xo_) + w * i;
 504                 // only consider the changebar space if we're drawing outermost text
 505                 if (text_.isMainText(*bv_.buffer()))
 506                         x += changebarMargin();
 507
 508                 int const starty = yo_ - row_.ascent();
 509                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 510
 511                 pain_.line(x, starty, x, starty + h, LColor::depthbar);
 512
 513                 if (i > prev_depth)
 514                         pain_.fillRectangle(x, starty, w, 2, LColor::depthbar);
 515                 if (i > next_depth)
 516                         pain_.fillRectangle(x, starty + h, w, 2, LColor::depthbar);
 517         }
 518 }
 519
 520
 521 int RowPainter::paintAppendixStart(int y)
 522 {
 523         LyXFont pb_font;
 524         pb_font.setColor(LColor::appendix);
 525         pb_font.decSize();
 526
 527         int w = 0;
 528         int a = 0;
 529         int d = 0;
 530
 531         docstring const label = _("Appendix");
 532         theFontMetrics(pb_font).rectText(label, w, a, d);
 533
 534         int const text_start = int(xo_ + (width_ - w) / 2);
 535         int const text_end = text_start + w;
 536
 537         pain_.rectText(text_start, y + d, label, pb_font, LColor::none, LColor::none);
 538
 539         pain_.line(int(xo_ + 1), y, text_start, y, LColor::appendix);
 540         pain_.line(text_end, y, int(xo_ + width_ - 2), y, LColor::appendix);
 541
 542         return 3 * defaultRowHeight();
 543 }
 544
 545
 546 void RowPainter::paintFirst()
 547 {
 548         ParagraphParameters const & parparams = par_.params();
 549
 550         int y_top = 0;
 551
 552         // start of appendix?
 553         if (parparams.startOfAppendix())
 554                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 555
 556         Buffer const & buffer = *bv_.buffer();
 557
 558         LyXLayout_ptr const & layout = par_.layout();
 559
 560         if (buffer.params().paragraph_separation == BufferParams::PARSEP_SKIP) {
 561                 if (pit_ != 0) {
 562                         if (layout->latextype == LATEX_PARAGRAPH
 563                                 && !par_.getDepth()) {
 564                                 y_top += buffer.params().getDefSkip().inPixels(bv_);
 565                         } else {
 566                                 LyXLayout_ptr const & playout = pars_[pit_ - 1].layout();
 567                                 if (playout->latextype == LATEX_PARAGRAPH
 568                                         && !pars_[pit_ - 1].getDepth()) {
 569                                         // is it right to use defskip here, too? (AS)
 570                                         y_top += buffer.params().getDefSkip().inPixels(bv_);
 571                                 }
 572                         }
 573                 }
 574         }
 575
 576         bool const is_rtl = text_.isRTL(buffer, par_);
 577         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 578         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << std::endl;
 579
 580         // should we print a label?
 581         if (layout->labeltype >= LABEL_STATIC
 582             && (layout->labeltype != LABEL_STATIC
 583                       || layout->latextype != LATEX_ENVIRONMENT
 584                       || is_seq)) {
 585
 586                 LyXFont const font = getLabelFont();
 587                 FontMetrics const & fm = theFontMetrics(font);
 588
 589                 docstring const str = par_.getLabelstring();
 590                 if (!str.empty()) {
 591                         double x = x_;
 592
 593                         // this is special code for the chapter layout. This is
 594                         // printed in an extra row and has a pagebreak at
 595                         // the top.
 596                         if (layout->counter == "chapter") {
 597                                 double spacing_val = 1.0;
 598                                 if (!parparams.spacing().isDefault()) {
 599                                         spacing_val = parparams.spacing().getValue();
 600                                 } else {
 601                                         spacing_val = buffer.params().spacing().getValue();
 602                                 }
 603
 604                                 int const labeladdon = int(fm.maxHeight() * layout->spacing.getValue() * spacing_val);
 605
 606                                 int const maxdesc = int(fm.maxDescent() * layout->spacing.getValue() * spacing_val)
 607                                         + int(layout->parsep) * defaultRowHeight();
 608
 609                                 if (is_rtl) {
 610                                         x = width_ - leftMargin() -
 611                                                 fm.width(str);
 612                                 }
 613
 614                                 pain_.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 615                         } else {
 616                                 // FIXME UNICODE
 617                                 docstring lab = from_utf8(layout->labelsep);
 618                                 if (is_rtl) {
 619                                         x = width_ - leftMargin()
 620                                                 + fm.width(lab);
 621                                 } else {
 622                                         x = x_ - fm.width(lab)
 623                                                 - fm.width(str);
 624                                 }
 625
 626                                 pain_.text(int(x), yo_, str, font);
 627                         }
 628                 }
 629
 630         // the labels at the top of an environment.
 631         // More or less for bibliography
 632         } else if (is_seq &&
 633                 (layout->labeltype == LABEL_TOP_ENVIRONMENT ||
 634                 layout->labeltype == LABEL_BIBLIO ||
 635                 layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 636                 LyXFont font = getLabelFont();
 637                 if (!par_.getLabelstring().empty()) {
 638                         docstring const str = par_.getLabelstring();
 639                         double spacing_val = 1.0;
 640                         if (!parparams.spacing().isDefault())
 641                                 spacing_val = parparams.spacing().getValue();
 642                         else
 643                                 spacing_val = buffer.params().spacing().getValue();
 644
 645                         FontMetrics const & fm = theFontMetrics(font);
 646
 647                         int const labeladdon = int(fm.maxHeight()
 648                                 * layout->spacing.getValue() * spacing_val);
 649
 650                         int maxdesc =
 651                                 int(fm.maxDescent() * layout->spacing.getValue() * spacing_val
 652                                 + (layout->labelbottomsep * defaultRowHeight()));
 653
 654                         double x = x_;
 655                         if (layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 656                                 if (is_rtl)
 657                                         x = leftMargin();
 658                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 659                                 x -= fm.width(str) / 2;
 660                         } else if (is_rtl) {
 661                                 x = width_ - leftMargin() -     fm.width(str);
 662                         }
 663                         pain_.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 664                 }
 665         }
 666 }
 667
 668
 669 void RowPainter::paintLast()
 670 {
 671         bool const is_rtl = text_.isRTL(*bv_.buffer(), par_);
 672         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 673
 674         // paint imaginary end-of-paragraph character
 675
 676         if (par_.isInserted(par_.size()) || par_.isDeleted(par_.size())) {
 677                 FontMetrics const & fm = theFontMetrics(bv_.buffer()->params().getFont());
 678                 int const length = fm.maxAscent() / 2;
 679                 LColor::color col = par_.isInserted(par_.size()) ? LColor::newtext : LColor::strikeout;
 680
 681                 pain_.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 682                            Painter::line_solid, Painter::line_thick);
 683                 pain_.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1, yo_ + 2, col,
 684                            Painter::line_solid, Painter::line_thick);
 685         }
 686
 687         // draw an endlabel
 688
 689         switch (endlabel) {
 690         case END_LABEL_BOX:
 691         case END_LABEL_FILLED_BOX: {
 692                 LyXFont const font = getLabelFont();
 693                 FontMetrics const & fm = theFontMetrics(font);
 694                 int const size = int(0.75 * fm.maxAscent());
 695                 int const y = yo_ - size;
 696                 int x = is_rtl ? nestMargin() + changebarMargin() : width_ - size;
 697
 698                 if (width_ - int(row_.width()) <= size)
 699                         x += (size - width_ + row_.width() + 1) * (is_rtl ? -1 : 1);
 700
 701                 if (endlabel == END_LABEL_BOX)
 702                         pain_.rectangle(x, y, size, size, LColor::eolmarker);
 703                 else
 704                         pain_.fillRectangle(x, y, size, size, LColor::eolmarker);
 705                 break;
 706         }
 707
 708         case END_LABEL_STATIC: {
 709                 LyXFont font = getLabelFont();
 710                 FontMetrics const & fm = theFontMetrics(font);
 711                 docstring const & str = par_.layout()->endlabelstring();
 712                 double const x = is_rtl ?
 713                         x_ - fm.width(str)
 714                         : - text_metrics_.rightMargin(pm_) - row_.width();
 715                 pain_.text(int(x), yo_, str, font);
 716                 break;
 717         }
 718
 719         case END_LABEL_NO_LABEL:
 720                 break;
 721         }
 722 }
 723
 724
 725 void RowPainter::paintText()
 726 {
 727         pos_type const end = row_.endpos();
 728         pos_type body_pos = par_.beginOfBody();
 729         if (body_pos > 0 &&
 730                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 731                 body_pos = 0;
 732         }
 733
 734         LyXLayout_ptr const & layout = par_.layout();
 735
 736         bool running_strikeout = false;
 737         bool is_struckout = false;
 738         int last_strikeout_x = 0;
 739
 740         // Use font span to speed things up, see below
 741         FontSpan font_span;
 742         LyXFont font;
 743         Buffer const & buffer = *bv_.buffer();
 744
 745         for (pos_type vpos = row_.pos(); vpos < end; ) {
 746                 if (x_ > bv_.workWidth())
 747                         break;
 748
 749                 pos_type const pos = text_.bidi.vis2log(vpos);
 750
 751                 if (pos >= par_.size()) {
 752                         ++vpos;
 753                         continue;
 754                 }
 755
 756                 // Use font span to speed things up, see above
 757                 if (vpos < font_span.first || vpos > font_span.last) {
 758                         font_span = par_.fontSpan(vpos);
 759                         font = text_.getFont(buffer, par_, vpos);
 760                 }
 761
 762                 const int width_pos =
 763                         text_.singleWidth(par_, pos, par_.getChar(pos), font);
 764
 765                 if (x_ + width_pos < 0) {
 766                         x_ += width_pos;
 767                         ++vpos;
 768                         continue;
 769                 }
 770
 771                 is_struckout = par_.isDeleted(pos);
 772
 773                 if (is_struckout && !running_strikeout) {
 774                         running_strikeout = true;
 775                         last_strikeout_x = int(x_);
 776                 }
 777
 778                 bool const highly_editable_inset = par_.isInset(pos)
 779                         && isHighlyEditableInset(par_.getInset(pos));
 780
 781                 // If we reach the end of a struck out range, paint it.
 782                 // We also don't paint across things like tables
 783                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 784                         // Calculate 1/3 height of the buffer's default font
 785                         FontMetrics const & fm
 786                                 = theFontMetrics(bv_.buffer()->params().getFont());
 787                         int const middle = yo_ - fm.maxAscent() / 3;
 788                         pain_.line(last_strikeout_x, middle, int(x_), middle,
 789                                 LColor::strikeout, Painter::line_solid, Painter::line_thin);
 790                         running_strikeout = false;
 791                 }
 792
 793                 if (body_pos > 0 && pos == body_pos - 1) {
 794                         // FIXME UNICODE
 795                         int const lwidth = theFontMetrics(getLabelFont())
 796                                 .width(from_utf8(layout->labelsep));
 797
 798                         x_ += label_hfill_ + lwidth - width_pos;
 799                 }
 800
 801                 if (par_.isHfill(pos)) {
 802                         x_ += 1;
 803
 804                         int const y0 = yo_;
 805                         int const y1 = y0 - defaultRowHeight() / 2;
 806
 807                         pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 808
 809                         if (par_.hfillExpansion(row_, pos)) {
 810                                 int const y2 = (y0 + y1) / 2;
 811
 812                                 if (pos >= body_pos) {
 813                                         pain_.line(int(x_), y2, int(x_ + hfill_), y2,
 814                                                   LColor::added_space,
 815                                                   Painter::line_onoffdash);
 816                                         x_ += hfill_;
 817                                 } else {
 818                                         pain_.line(int(x_), y2, int(x_ + label_hfill_), y2,
 819                                                   LColor::added_space,
 820                                                   Painter::line_onoffdash);
 821                                         x_ += label_hfill_;
 822                                 }
 823                                 pain_.line(int(x_), y1, int(x_), y0, LColor::added_space);
 824                         }
 825                         x_ += 2;
 826                         ++vpos;
 827                 } else if (par_.isSeparator(pos)) {
 828                         x_ += width_pos;
 829                         if (pos >= body_pos)
 830                                 x_ += separator_;
 831                         ++vpos;
 832                 } else {
 833                         paintFromPos(vpos);
 834                 }
 835         }
 836
 837         // if we reach the end of a struck out range, paint it
 838         if (running_strikeout) {
 839                 // calculate 1/3 height of the buffer's default font
 840                 FontMetrics const & fm
 841                         = theFontMetrics(bv_.buffer()->params().getFont());
 842                 int const middle = yo_ - fm.maxAscent() / 3;
 843                 pain_.line(last_strikeout_x, middle, int(x_), middle,
 844                         LColor::strikeout, Painter::line_solid, Painter::line_thin);
 845                 running_strikeout = false;
 846         }
 847 }
 848
 849
 850 bool CursorOnRow(PainterInfo & pi, pit_type const pit,
 851         RowList::const_iterator rit, LyXText const & text)
 852 {
 853         // Is there a cursor on this row (or inside inset on row)
 854         LCursor & cur = pi.base.bv->cursor();
 855         for (size_type d = 0; d < cur.depth(); ++d) {
 856                 CursorSlice const & sl = cur[d];
 857                 if (sl.text() == &text
 858                     && sl.pit() == pit
 859                     && sl.pos() >= rit->pos()
 860                     && sl.pos() <= rit->endpos())
 861                         return true;
 862         }
 863         return false;
 864 }
 865
 866
 867 bool innerCursorOnRow(PainterInfo & pi, pit_type pit,
 868         RowList::const_iterator rit, LyXText const & text)
 869 {
 870         // Is there a cursor inside an inset on this row, and is this inset
 871         // the only "character" on this row
 872         LCursor & cur = pi.base.bv->cursor();
 873         if (rit->pos() + 1 != rit->endpos())
 874                 return false;
 875         for (size_type d = 0; d < cur.depth(); d++) {
 876                 CursorSlice const & sl = cur[d];
 877                 if (sl.text() == &text
 878                     && sl.pit() == pit
 879                     && sl.pos() == rit->pos())
 880                         return d < cur.depth() - 1;
 881         }
 882         return false;
 883 }
 884
 885
 886 void paintPar
 887         (PainterInfo & pi, LyXText const & text, pit_type pit, int x, int y,
 888          bool repaintAll)
 889 {
 890 //      lyxerr << "  paintPar: pit: " << pit << " at y: " << y << endl;
 891         int const ww = pi.base.bv->workHeight();
 892
 893         pi.base.bv->coordCache().parPos()[&text][pit] = Point(x, y);
 894
 895         Paragraph const & par = text.paragraphs()[pit];
 896         ParagraphMetrics const & pm = pi.base.bv->parMetrics(&text, pit);
 897         if (pm.rows().empty())
 898                 return;
 899
 900         RowList::const_iterator const rb = pm.rows().begin();
 901         RowList::const_iterator const re = pm.rows().end();
 902
 903         y -= rb->ascent();
 904         size_type rowno = 0;
 905         for (RowList::const_iterator rit = rb; rit != re; ++rit, ++rowno) {
 906                 y += rit->ascent();
 907                 // Allow setting of refreshInside for nested insets in
 908                 // this row only
 909                 bool tmp = refreshInside;
 910
 911                 // Row signature; has row changed since last paint?
 912                 bool row_has_changed = pm.rowChangeStatus()[rowno];
 913
 914                 bool cursor_on_row = CursorOnRow(pi, pit, rit, text);
 915                 bool in_inset_alone_on_row = innerCursorOnRow(pi, pit, rit,
 916                         text);
 917                 bool leftEdgeFixed =
 918                         (par.getAlign() == LYX_ALIGN_LEFT ||
 919                          par.getAlign() == LYX_ALIGN_BLOCK);
 920
 921                 // If this is the only object on the row, we can make it wide
 922                 //
 923                 // FIXME: there is a const_cast here because paintPar() is not supposed
 924                 // to touch the paragraph contents. So either we move this "wide"
 925                 // property out of InsetText or we localize the feature to the painting
 926                 // done here.
 927                 for (pos_type i = rit->pos() ; i != rit->endpos(); ++i) {
 928                         InsetBase const * const in = par.getInset(i);
 929                         if (in) {
 930                                 InsetText * t = const_cast<InsetText *>(in->asTextInset());
 931                                 if (t)
 932                                         t->setWide(in_inset_alone_on_row && leftEdgeFixed);
 933                         }
 934                 }
 935
 936                 // If selection is on, the current row signature differs
 937                 // from cache, or cursor is inside an inset _on this row_,
 938                 // then paint the row
 939                 if (repaintAll || row_has_changed || cursor_on_row) {
 940                         bool const inside = (y + rit->descent() >= 0
 941                                 && y - rit->ascent() < ww);
 942                         // it is not needed to draw on screen if we are not inside.
 943                         pi.pain.setDrawingEnabled(inside);
 944                         RowPainter rp(pi, text, pit, *rit, x, y);
 945                         // Clear background of this row
 946                         // (if paragraph background was not cleared)
 947                         if (!repaintAll &&
 948                             (!(in_inset_alone_on_row && leftEdgeFixed)
 949                                 || row_has_changed)) {
 950                                 pi.pain.fillRectangle(x, y - rit->ascent(),
 951                                     rp.maxWidth(), rit->height(),
 952                                     text.backgroundColor());
 953                                 // If outer row has changed, force nested
 954                                 // insets to repaint completely
 955                                 if (row_has_changed)
 956                                         refreshInside = true;
 957                         }
 958
 959                         // Instrumentation for testing row cache (see also
 960                         // 12 lines lower):
 961                         if (lyxerr.debugging(Debug::PAINTING)) {
 962                                 if (text.isMainText(*pi.base.bv->buffer()))
 963                                         lyxerr[Debug::PAINTING] << "#";
 964                                 else
 965                                         lyxerr[Debug::PAINTING] << "[" <<
 966                                                 repaintAll << row_has_changed <<
 967                                                 cursor_on_row << "]";
 968                         }
 969                         rp.paintAppendix();
 970                         rp.paintDepthBar();
 971                         rp.paintChangeBar();
 972                         if (rit == rb)
 973                                 rp.paintFirst();
 974                         rp.paintText();
 975                         if (rit + 1 == re)
 976                                 rp.paintLast();
 977                 }
 978                 y += rit->descent();
 979                 // Restore, see above
 980                 refreshInside = tmp;
 981         }
 982         // Re-enable screen drawing for future use of the painter.
 983         pi.pain.setDrawingEnabled(true);
 984
 985         if (lyxerr.debugging(Debug::PAINTING)) {
 986                 lyxerr[Debug::PAINTING] << "." << endl;
 987         }
 988 }
 989
 990 } // namespace anon
 991
 992
 993 void paintText(BufferView & bv,
 994                Painter & pain)
 995 {
 996         BOOST_ASSERT(bv.buffer());
 997         Buffer const & buffer = *bv.buffer();
 998         LyXText & text = buffer.text();
 999         bool const select = bv.cursor().selection();
1000         ViewMetricsInfo const & vi = bv.viewMetricsInfo();
1001
1002         PainterInfo pi(const_cast<BufferView *>(&bv), pain);
1003         // Should the whole screen, including insets, be refreshed?
1004         // FIXME: We should also distinguish DecorationUpdate to avoid text
1005         // drawing if possible. This is not possible to do easily right now
1006         // because of the single backing pixmap.
1007         bool repaintAll = select || vi.update_strategy != SingleParUpdate;
1008
1009         if (repaintAll) {
1010                 // Clear background (if not delegated to rows)
1011                 pain.fillRectangle(0, vi.y1, bv.workWidth(), vi.y2 - vi.y1,
1012                         text.backgroundColor());
1013         }
1014         if (select) {
1015                 text.drawSelection(pi, 0, 0);
1016         }
1017
1018         int yy = vi.y1;
1019         // draw contents
1020         for (pit_type pit = vi.p1; pit <= vi.p2; ++pit) {
1021                 refreshInside = repaintAll;
1022                 ParagraphMetrics const & pm = bv.parMetrics(&text, pit);
1023                 yy += pm.ascent();
1024                 paintPar(pi, text, pit, 0, yy, repaintAll);
1025                 yy += pm.descent();
1026         }
1027
1028         // and grey out above (should not happen later)
1029 //      lyxerr << "par ascent: " << text.getPar(vi.p1).ascent() << endl;
1030         if (vi.y1 > 0 && vi.update_strategy != SingleParUpdate)
1031                 pain.fillRectangle(0, 0, bv.workWidth(), vi.y1, LColor::bottomarea);
1032
1033         // and possibly grey out below
1034 //      lyxerr << "par descent: " << text.getPar(vi.p1).ascent() << endl;
1035         if (vi.y2 < bv.workHeight() && vi.update_strategy != SingleParUpdate)
1036                 pain.fillRectangle(0, vi.y2, bv.workWidth(), bv.workHeight() - vi.y2, LColor::bottomarea);
1037 }
1038
1039
1040 void paintTextInset(LyXText const & text, PainterInfo & pi, int x, int y)
1041 {
1042 //      lyxerr << "  paintTextInset: y: " << y << endl;
1043
1044         y -= pi.base.bv->parMetrics(&text, 0).ascent();
1045         // This flag cannot be set from within same inset:
1046         bool repaintAll = refreshInside;
1047         for (int pit = 0; pit < int(text.paragraphs().size()); ++pit) {
1048                 ParagraphMetrics const & pmi
1049                         = pi.base.bv->parMetrics(&text, pit);
1050                 y += pmi.ascent();
1051                 paintPar(pi, text, pit, x, y, repaintAll);
1052                 y += pmi.descent();
1053         }
1054 }
1055
1056
1057 } // namespace lyx