src/rowpainter.cpp

   1 /**
   2  * \file rowpainter.cpp
   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 "Bidi.h"
  17 #include "Buffer.h"
  18 #include "CoordCache.h"
  19 #include "Cursor.h"
  20 #include "BufferParams.h"
  21 #include "BufferView.h"
  22 #include "Changes.h"
  23 #include "Encoding.h"
  24 #include "support/gettext.h"
  25 #include "Language.h"
  26 #include "Layout.h"
  27 #include "LyXRC.h"
  28 #include "Row.h"
  29 #include "MetricsInfo.h"
  30 #include "Paragraph.h"
  31 #include "ParagraphMetrics.h"
  32 #include "paragraph_funcs.h"
  33 #include "ParagraphParameters.h"
  34 #include "TextMetrics.h"
  35 #include "VSpace.h"
  36
  37 #include "frontends/FontMetrics.h"
  38 #include "frontends/Painter.h"
  39
  40 #include "insets/InsetText.h"
  41
  42 #include "support/debug.h"
  43 #include "support/textutils.h"
  44
  45 #include <boost/assert.hpp>
  46 #include <boost/crc.hpp>
  47
  48 #include <ostream>
  49
  50 using namespace std;
  51
  52 namespace lyx {
  53
  54 using frontend::Painter;
  55 using frontend::FontMetrics;
  56
  57 RowPainter::RowPainter(PainterInfo & pi,
  58         Text const & text, pit_type pit, Row const & row, Bidi & bidi, int x, int y)
  59         : pi_(pi), text_(text),
  60           text_metrics_(pi_.base.bv->textMetrics(&text)),
  61           pars_(text.paragraphs()),
  62           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  63           pm_(text_metrics_.parMetrics(pit)),
  64           bidi_(bidi), erased_(pi_.erased_),
  65           xo_(x), yo_(y), width_(text_metrics_.width())
  66 {
  67         bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
  68         x_ = row_.x + xo_;
  69
  70         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  71         //row_.dump();
  72
  73         BOOST_ASSERT(pit >= 0);
  74         BOOST_ASSERT(pit < int(text.paragraphs().size()));
  75 }
  76
  77
  78 FontInfo RowPainter::labelFont() const
  79 {
  80         return text_.labelFont(pi_.base.bv->buffer(), par_);
  81 }
  82
  83
  84 int RowPainter::leftMargin() const
  85 {
  86         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
  87                 row_.pos());
  88 }
  89
  90 // If you want to debug inset metrics uncomment the following line:
  91 //#define DEBUG_METRICS
  92 // This draws green lines around each inset.
  93
  94
  95 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
  96 {
  97         Font const font = text_metrics_.displayFont(pit_, pos);
  98
  99         BOOST_ASSERT(inset);
 100         // Backup full_repaint status because some insets (InsetTabular)
 101         // requires a full repaint
 102         bool pi_full_repaint = pi_.full_repaint;
 103
 104         // FIXME: We should always use font, see documentation of
 105         // noFontChange() in Inset.h.
 106         pi_.base.font = inset->noFontChange() ?
 107                 pi_.base.bv->buffer().params().getFont().fontInfo() :
 108                 font.fontInfo();
 109         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 110         pi_.erased_ = erased_ || par_.isDeleted(pos);
 111         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 112         // insets are painted completely. Recursive
 113         inset->drawSelection(pi_, int(x_), yo_);
 114         inset->draw(pi_, int(x_), yo_);
 115
 116         Dimension const & dim = pm_.insetDimension(inset);
 117
 118         paintForeignMark(x_, font.language(), dim.descent());
 119
 120         x_ += dim.width();
 121
 122         // Restore full_repaint status.
 123         pi_.full_repaint = pi_full_repaint;
 124
 125 #ifdef DEBUG_METRICS
 126         int const x1 = int(x_ - dim.width());
 127         Dimension dim2;
 128         BOOST_ASSERT(max_witdh_ > 0);
 129         int right_margin = text_metrics_.rightMargin(pm_);
 130         int const w = max_witdh_ - leftMargin() - right_margin;
 131         MetricsInfo mi(pi_.base.bv, font.fontInfo(), w);
 132         inset->metrics(mi, dim2);
 133         if (dim.wid != dim2.wid)
 134                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 135                        << " draw width " << dim.width()
 136                        << "> metrics width " << dim2.wid << "." << endl;
 137         if (dim->asc != dim2.asc)
 138                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 139                        << " draw ascent " << dim.ascent()
 140                        << "> metrics ascent " << dim2.asc << "." << endl;
 141         if (dim2.descent() != dim.des)
 142                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 143                        << " draw ascent " << dim.descent()
 144                        << "> metrics descent " << dim2.des << "." << endl;
 145         BOOST_ASSERT(dim2.wid == dim.wid);
 146         BOOST_ASSERT(dim2.asc == dim.asc);
 147         BOOST_ASSERT(dim2.des == dim.des);
 148         int const x2 = x1 + dim.wid;
 149         int const y1 = yo_ + dim.des;
 150         int const y2 = yo_ - dim.asc;
 151         pi_.pain.line(x1, y1, x1, y2, Color_green);
 152         pi_.pain.line(x1, y1, x2, y1, Color_green);
 153         pi_.pain.line(x2, y1, x2, y2, Color_green);
 154         pi_.pain.line(x1, y2, x2, y2, Color_green);
 155 #endif
 156 }
 157
 158
 159 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 160 {
 161         pos_type pos = bidi_.vis2log(vpos);
 162
 163         docstring str;
 164
 165         // first char
 166         char_type c = par_.getChar(pos);
 167         str += c;
 168         ++vpos;
 169
 170         int const width = theFontMetrics(font).width(c);
 171         int dx = 0;
 172
 173         for (pos_type i = pos - 1; i >= 0; --i) {
 174                 c = par_.getChar(i);
 175                 if (!Encodings::isComposeChar_hebrew(c)) {
 176                         if (isPrintableNonspace(c)) {
 177                                 int const width2 = pm_.singleWidth(i,
 178                                         text_metrics_.displayFont(pit_, i));
 179                                 dx = (c == 0x05e8 || // resh
 180                                       c == 0x05d3)   // dalet
 181                                         ? width2 - width
 182                                         : (width2 - width) / 2;
 183                         }
 184                         break;
 185                 }
 186         }
 187
 188         // Draw nikud
 189         pi_.pain.text(int(x_) + dx, yo_, str, font);
 190 }
 191
 192
 193 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 194 {
 195         pos_type pos = bidi_.vis2log(vpos);
 196         docstring str;
 197
 198         // first char
 199         char_type c = par_.getChar(pos);
 200         c = par_.transformChar(c, pos);
 201         str += c;
 202         ++vpos;
 203
 204         int const width = theFontMetrics(font).width(c);
 205         int dx = 0;
 206
 207         for (pos_type i = pos - 1; i >= 0; --i) {
 208                 c = par_.getChar(i);
 209                 if (!Encodings::isComposeChar_arabic(c)) {
 210                         if (isPrintableNonspace(c)) {
 211                                 int const width2 = pm_.singleWidth(i,
 212                                                 text_metrics_.displayFont(pit_, i));
 213                                 dx = (width2 - width) / 2;
 214                         }
 215                         break;
 216                 }
 217         }
 218         // Draw nikud
 219         pi_.pain.text(int(x_) + dx, yo_, str, font);
 220 }
 221
 222
 223 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 224                             bool hebrew, bool arabic)
 225 {
 226         // This method takes up 70% of time when typing
 227         pos_type pos = bidi_.vis2log(vpos);
 228         pos_type const end = row_.endpos();
 229         FontSpan const font_span = par_.fontSpan(pos);
 230         Change::Type const prev_change = par_.lookupChange(pos).type;
 231
 232         // first character
 233         vector<char_type> str;
 234         str.reserve(100);
 235         str.push_back(par_.getChar(pos));
 236
 237         if (arabic) {
 238                 char_type c = str[0];
 239                 if (c == '(')
 240                         c = ')';
 241                 else if (c == ')')
 242                         c = '(';
 243                 str[0] = par_.transformChar(c, pos);
 244         }
 245
 246         // collect as much similar chars as we can
 247         for (++vpos ; vpos < end ; ++vpos) {
 248                 pos = bidi_.vis2log(vpos);
 249                 if (pos < font_span.first || pos > font_span.last)
 250                         break;
 251
 252                 if (prev_change != par_.lookupChange(pos).type)
 253                         break;
 254
 255                 char_type c = par_.getChar(pos);
 256
 257                 if (!isPrintableNonspace(c))
 258                         break;
 259
 260                 /* Because we do our own bidi, at this point the strings are
 261                  * already in visual order. However, Qt also applies its own
 262                  * bidi algorithm to strings that it paints to the screen.
 263                  * Therefore, if we were to paint Hebrew/Arabic words as a
 264                  * single string, the letters in the words would get reversed
 265                  * again. In order to avoid that, we don't collect Hebrew/
 266                  * Arabic characters, but rather paint them one at a time.
 267                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 268                  */
 269                 if (hebrew)
 270                         break;
 271
 272                 /* FIXME: these checks are irrelevant, since 'arabic' and
 273                  * 'hebrew' alone are already going to trigger a break.
 274                  * However, this should not be removed completely, because
 275                  * if an alternative solution is found which allows grouping
 276                  * of arabic and hebrew characters, then these breaks may have
 277                  * to be re-applied.
 278
 279                 if (arabic && Encodings::isComposeChar_arabic(c))
 280                         break;
 281
 282                 if (hebrew && Encodings::isComposeChar_hebrew(c))
 283                         break;
 284                 */
 285
 286                 if (arabic) {
 287                         if (c == '(')
 288                                 c = ')';
 289                         else if (c == ')')
 290                                 c = '(';
 291                         c = par_.transformChar(c, pos);
 292                         /* see comment in hebrew, explaining why we break */
 293                         break;
 294                 }
 295
 296                 str.push_back(c);
 297         }
 298
 299         docstring s(&str[0], str.size());
 300
 301         if (prev_change != Change::UNCHANGED) {
 302                 FontInfo copy = font;
 303                 if (prev_change == Change::DELETED) {
 304                         copy.setColor(Color_deletedtext);
 305                 } else if (prev_change == Change::INSERTED) {
 306                         copy.setColor(Color_addedtext);
 307                 }
 308                 x_ += pi_.pain.text(int(x_), yo_, s, copy);
 309         } else {
 310                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 311         }
 312 }
 313
 314
 315 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 316                 int desc)
 317 {
 318         if (!lyxrc.mark_foreign_language)
 319                 return;
 320         if (lang == latex_language)
 321                 return;
 322         if (lang == pi_.base.bv->buffer().params().language)
 323                 return;
 324
 325         int const y = yo_ + 1 + desc;
 326         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 327 }
 328
 329
 330 void RowPainter::paintFromPos(pos_type & vpos)
 331 {
 332         pos_type const pos = bidi_.vis2log(vpos);
 333         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 334         double const orig_x = x_;
 335
 336         // usual characters, no insets
 337         char_type const c = par_.getChar(pos);
 338
 339         // special case languages
 340         string const & lang = orig_font.language()->lang();
 341         bool const hebrew = lang == "hebrew";
 342         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 343                                                 lang == "farsi";
 344
 345         // draw as many chars as we can
 346         if ((!hebrew && !arabic)
 347                 || (hebrew && !Encodings::isComposeChar_hebrew(c))
 348                 || (arabic && !Encodings::isComposeChar_arabic(c))) {
 349                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 350         } else if (hebrew) {
 351                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 352         } else if (arabic) {
 353                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 354         }
 355
 356         paintForeignMark(orig_x, orig_font.language());
 357 }
 358
 359
 360 void RowPainter::paintChangeBar()
 361 {
 362         pos_type const start = row_.pos();
 363         pos_type end = row_.endpos();
 364
 365         if (par_.size() == end) {
 366                 // this is the last row of the paragraph;
 367                 // thus, we must also consider the imaginary end-of-par character
 368                 end++;
 369         }
 370
 371         if (start == end || !par_.isChanged(start, end))
 372                 return;
 373
 374         int const height = text_metrics_.isLastRow(pit_, row_)
 375                 ? row_.ascent()
 376                 : row_.height();
 377
 378         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 379 }
 380
 381
 382 void RowPainter::paintAppendix()
 383 {
 384         // only draw the appendix frame once (for the main text)
 385         if (!par_.params().appendix() || !text_.isMainText(pi_.base.bv->buffer()))
 386                 return;
 387
 388         int y = yo_ - row_.ascent();
 389
 390         if (par_.params().startOfAppendix())
 391                 y += 2 * defaultRowHeight();
 392
 393         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 394         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 395 }
 396
 397
 398 void RowPainter::paintDepthBar()
 399 {
 400         depth_type const depth = par_.getDepth();
 401
 402         if (depth <= 0)
 403                 return;
 404
 405         depth_type prev_depth = 0;
 406         if (!text_metrics_.isFirstRow(pit_, row_)) {
 407                 pit_type pit2 = pit_;
 408                 if (row_.pos() == 0)
 409                         --pit2;
 410                 prev_depth = pars_[pit2].getDepth();
 411         }
 412
 413         depth_type next_depth = 0;
 414         if (!text_metrics_.isLastRow(pit_, row_)) {
 415                 pit_type pit2 = pit_;
 416                 if (row_.endpos() >= pars_[pit2].size())
 417                         ++pit2;
 418                 next_depth = pars_[pit2].getDepth();
 419         }
 420
 421         for (depth_type i = 1; i <= depth; ++i) {
 422                 int const w = nestMargin() / 5;
 423                 int x = int(xo_) + w * i;
 424                 // only consider the changebar space if we're drawing outermost text
 425                 if (text_.isMainText(pi_.base.bv->buffer()))
 426                         x += changebarMargin();
 427
 428                 int const starty = yo_ - row_.ascent();
 429                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 430
 431                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 432
 433                 if (i > prev_depth)
 434                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 435                 if (i > next_depth)
 436                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 437         }
 438 }
 439
 440
 441 int RowPainter::paintAppendixStart(int y)
 442 {
 443         FontInfo pb_font = sane_font;
 444         pb_font.setColor(Color_appendix);
 445         pb_font.decSize();
 446
 447         int w = 0;
 448         int a = 0;
 449         int d = 0;
 450
 451         docstring const label = _("Appendix");
 452         theFontMetrics(pb_font).rectText(label, w, a, d);
 453
 454         int const text_start = int(xo_ + (width_ - w) / 2);
 455         int const text_end = text_start + w;
 456
 457         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 458
 459         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 460         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 461
 462         return 3 * defaultRowHeight();
 463 }
 464
 465
 466 void RowPainter::paintFirst()
 467 {
 468         ParagraphParameters const & parparams = par_.params();
 469
 470         int y_top = 0;
 471
 472         // start of appendix?
 473         if (parparams.startOfAppendix())
 474                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 475
 476         Buffer const & buffer = pi_.base.bv->buffer();
 477         Layout const & layout = par_.layout();
 478
 479         if (buffer.params().paragraph_separation == BufferParams::ParagraphSkipSeparation) {
 480                 if (pit_ != 0) {
 481                         if (layout.latextype == LATEX_PARAGRAPH
 482                                 && !par_.getDepth()) {
 483                                 y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 484                         } else {
 485                                 Layout const & playout = pars_[pit_ - 1].layout();
 486                                 if (playout.latextype == LATEX_PARAGRAPH
 487                                         && !pars_[pit_ - 1].getDepth()) {
 488                                         // is it right to use defskip here, too? (AS)
 489                                         y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 490                                 }
 491                         }
 492                 }
 493         }
 494
 495         bool const is_rtl = text_.isRTL(buffer, par_);
 496         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 497         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 498
 499         // should we print a label?
 500         if (layout.labeltype >= LABEL_STATIC
 501             && (layout.labeltype != LABEL_STATIC
 502                       || layout.latextype != LATEX_ENVIRONMENT
 503                       || is_seq)) {
 504
 505                 FontInfo const font = labelFont();
 506                 FontMetrics const & fm = theFontMetrics(font);
 507
 508                 docstring const str = par_.labelString();
 509                 if (!str.empty()) {
 510                         double x = x_;
 511
 512                         // this is special code for the chapter layout. This is
 513                         // printed in an extra row and has a pagebreak at
 514                         // the top.
 515                         if (layout.counter == "chapter") {
 516                                 double spacing_val = 1.0;
 517                                 if (!parparams.spacing().isDefault()) {
 518                                         spacing_val = parparams.spacing().getValue();
 519                                 } else {
 520                                         spacing_val = buffer.params().spacing().getValue();
 521                                 }
 522
 523                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 524
 525                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 526                                         + int(layout.parsep) * defaultRowHeight();
 527
 528                                 if (is_rtl) {
 529                                         x = width_ - leftMargin() -
 530                                                 fm.width(str);
 531                                 }
 532
 533                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 534                         } else {
 535                                 if (is_rtl) {
 536                                         x = width_ - leftMargin()
 537                                                 + fm.width(layout.labelsep);
 538                                 } else {
 539                                         x = x_ - fm.width(layout.labelsep)
 540                                                 - fm.width(str);
 541                                 }
 542
 543                                 pi_.pain.text(int(x), yo_, str, font);
 544                         }
 545                 }
 546
 547         // the labels at the top of an environment.
 548         // More or less for bibliography
 549         } else if (is_seq &&
 550                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 551                 layout.labeltype == LABEL_BIBLIO ||
 552                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 553                 FontInfo const font = labelFont();
 554                 docstring const str = par_.labelString();
 555                 if (!str.empty()) {
 556                         double spacing_val = 1.0;
 557                         if (!parparams.spacing().isDefault())
 558                                 spacing_val = parparams.spacing().getValue();
 559                         else
 560                                 spacing_val = buffer.params().spacing().getValue();
 561
 562                         FontMetrics const & fm = theFontMetrics(font);
 563
 564                         int const labeladdon = int(fm.maxHeight()
 565                                 * layout.spacing.getValue() * spacing_val);
 566
 567                         int maxdesc =
 568                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 569                                 + (layout.labelbottomsep * defaultRowHeight()));
 570
 571                         double x = x_;
 572                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 573                                 if (is_rtl)
 574                                         x = leftMargin();
 575                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 576                                 x -= fm.width(str) / 2;
 577                         } else if (is_rtl) {
 578                                 x = width_ - leftMargin() -     fm.width(str);
 579                         }
 580                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 581                 }
 582         }
 583 }
 584
 585
 586 void RowPainter::paintLast()
 587 {
 588         bool const is_rtl = text_.isRTL(pi_.base.bv->buffer(), par_);
 589         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 590
 591         // paint imaginary end-of-paragraph character
 592
 593         if (par_.isInserted(par_.size()) || par_.isDeleted(par_.size())) {
 594                 FontMetrics const & fm = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 595                 int const length = fm.maxAscent() / 2;
 596                 ColorCode col = par_.isInserted(par_.size()) ? Color_addedtext : Color_deletedtext;
 597
 598                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 599                            Painter::line_solid, Painter::line_thick);
 600                 pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1, yo_ + 2, col,
 601                            Painter::line_solid, Painter::line_thick);
 602         }
 603
 604         // draw an endlabel
 605
 606         switch (endlabel) {
 607         case END_LABEL_BOX:
 608         case END_LABEL_FILLED_BOX: {
 609                 FontInfo const font = labelFont();
 610                 FontMetrics const & fm = theFontMetrics(font);
 611                 int const size = int(0.75 * fm.maxAscent());
 612                 int const y = yo_ - size;
 613                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 614                 int x = is_rtl ? nestMargin() + changebarMargin()
 615                         : max_row_width - text_metrics_.rightMargin(pm_);
 616
 617                 // If needed, move the box a bit to avoid overlapping with text.
 618                 int const rem = max_row_width - row_.width();
 619                 if (rem <= 0)
 620                         x += is_rtl ? rem : - rem;
 621
 622                 if (endlabel == END_LABEL_BOX)
 623                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 624                 else
 625                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 626                 break;
 627         }
 628
 629         case END_LABEL_STATIC: {
 630                 FontInfo const font = labelFont();
 631                 FontMetrics const & fm = theFontMetrics(font);
 632                 docstring const & str = par_.layout().endlabelstring();
 633                 double const x = is_rtl ?
 634                         x_ - fm.width(str)
 635                         : - text_metrics_.rightMargin(pm_) - row_.width();
 636                 pi_.pain.text(int(x), yo_, str, font);
 637                 break;
 638         }
 639
 640         case END_LABEL_NO_LABEL:
 641                 break;
 642         }
 643 }
 644
 645
 646 void RowPainter::paintOnlyInsets()
 647 {
 648         pos_type const end = row_.endpos();
 649         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 650                 // If outer row has changed, nested insets are repaint completely.
 651                 Inset const * inset = par_.getInset(pos);
 652                 if (!inset)
 653                         continue;
 654                 if (x_ > pi_.base.bv->workWidth())
 655                         continue;
 656                 x_ = pi_.base.bv->coordCache().getInsets().x(inset);
 657                 paintInset(inset, pos);
 658         }
 659 }
 660
 661
 662 void RowPainter::paintText()
 663 {
 664         pos_type const end = row_.endpos();
 665         // Spaces at logical line breaks in bidi text must be skipped during
 666         // painting. However, they may appear visually in the middle
 667         // of a row; they must be skipped, wherever they are...
 668         // * logically "abc_[HEBREW_\nHEBREW]"
 669         // * visually "abc_[_WERBEH\nWERBEH]"
 670         pos_type skipped_sep_vpos = -1;
 671         pos_type body_pos = par_.beginOfBody();
 672         if (body_pos > 0 &&
 673                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 674                 body_pos = 0;
 675         }
 676
 677         Layout const & layout = par_.layout();
 678
 679         bool running_strikeout = false;
 680         bool is_struckout = false;
 681         int last_strikeout_x = 0;
 682
 683         // check for possible inline completion
 684         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 685         pos_type inlineCompletionVPos = -1;
 686         if (inlineCompletionPos.inTexted()
 687             && inlineCompletionPos.text() == &text_
 688             && inlineCompletionPos.pit() == pit_
 689             && inlineCompletionPos.pos() - 1 >= row_.pos()
 690             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 691                 // draw logically behind the previous character
 692                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 693         }
 694
 695         // Use font span to speed things up, see below
 696         FontSpan font_span;
 697         Font font;
 698
 699         // If the last logical character is a separator, don't paint it, unless
 700         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 701         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 702                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 703
 704         for (pos_type vpos = row_.pos(); vpos < end; ) {
 705                 if (x_ > pi_.base.bv->workWidth())
 706                         break;
 707
 708                 // Skip the separator at the logical end of the row
 709                 if (vpos == skipped_sep_vpos) {
 710                         ++vpos;
 711                         continue;
 712                 }
 713
 714                 pos_type const pos = bidi_.vis2log(vpos);
 715
 716                 if (pos >= par_.size()) {
 717                         ++vpos;
 718                         continue;
 719                 }
 720
 721                 // Use font span to speed things up, see above
 722                 if (vpos < font_span.first || vpos > font_span.last) {
 723                         font_span = par_.fontSpan(vpos);
 724                         font = text_metrics_.displayFont(pit_, vpos);
 725
 726                         // split font span if inline completion is inside
 727                         if (font_span.first <= inlineCompletionVPos
 728                             && font_span.last > inlineCompletionVPos)
 729                                 font_span.last = inlineCompletionVPos;
 730                 }
 731
 732                 const int width_pos = pm_.singleWidth(pos, font);
 733
 734                 if (x_ + width_pos < 0) {
 735                         x_ += width_pos;
 736                         ++vpos;
 737                         continue;
 738                 }
 739
 740                 is_struckout = par_.isDeleted(pos);
 741
 742                 if (is_struckout && !running_strikeout) {
 743                         running_strikeout = true;
 744                         last_strikeout_x = int(x_);
 745                 }
 746
 747                 Inset const * inset = par_.getInset(pos);
 748                 bool const highly_editable_inset = inset
 749                         && inset->editable() == Inset::HIGHLY_EDITABLE;
 750
 751                 // If we reach the end of a struck out range, paint it.
 752                 // We also don't paint across things like tables
 753                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 754                         // Calculate 1/3 height of the buffer's default font
 755                         FontMetrics const & fm
 756                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 757                         int const middle = yo_ - fm.maxAscent() / 3;
 758                         pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 759                                 Color_deletedtext, Painter::line_solid, Painter::line_thin);
 760                         running_strikeout = false;
 761                 }
 762
 763                 if (body_pos > 0 && pos == body_pos - 1) {
 764                         int const lwidth = theFontMetrics(labelFont())
 765                                 .width(layout.labelsep);
 766
 767                         x_ += row_.label_hfill + lwidth - width_pos;
 768                 }
 769
 770                 // Is the inline completion in front of character?
 771                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 772                         paintInlineCompletion(font);
 773
 774                 if (par_.isSeparator(pos)) {
 775                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 776                         double const orig_x = x_;
 777                         x_ += width_pos;
 778                         if (pos >= body_pos)
 779                                 x_ += row_.separator;
 780                         paintForeignMark(orig_x, orig_font.language());
 781                         ++vpos;
 782
 783                 } else if (inset) {
 784                         // If outer row has changed, nested insets are repaint completely.
 785                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 786                         paintInset(inset, pos);
 787                         ++vpos;
 788
 789                 } else {
 790                         // paint as many characters as possible.
 791                         paintFromPos(vpos);
 792                 }
 793
 794                 // Is the inline completion after character?
 795                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 796                         paintInlineCompletion(font);
 797         }
 798
 799         // if we reach the end of a struck out range, paint it
 800         if (running_strikeout) {
 801                 // calculate 1/3 height of the buffer's default font
 802                 FontMetrics const & fm
 803                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 804                 int const middle = yo_ - fm.maxAscent() / 3;
 805                 pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 806                         Color_deletedtext, Painter::line_solid, Painter::line_thin);
 807                 running_strikeout = false;
 808         }
 809 }
 810
 811
 812 void RowPainter::paintInlineCompletion(Font const & font)
 813 {
 814         docstring completion = pi_.base.bv->inlineCompletion();
 815         FontInfo f = font.fontInfo();
 816         bool rtl = font.isRightToLeft();
 817
 818         // draw the unique and the non-unique completion part
 819         // Note: this is not time-critical as it is
 820         // only done once per screen.
 821         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 822         docstring s1 = completion.substr(0, uniqueTo);
 823         docstring s2 = completion.substr(uniqueTo);
 824         ColorCode c1 = Color_inlinecompletion;
 825         ColorCode c2 = Color_nonunique_inlinecompletion;
 826
 827         // right to left?
 828         if (rtl) {
 829                 swap(s1, s2);
 830                 reverse(s1.begin(), s1.end());
 831                 reverse(s2.begin(), s2.end());
 832                 swap(c1, c2);
 833         }
 834
 835         if (s1.size() > 0) {
 836                 f.setColor(c1);
 837                 pi_.pain.text(int(x_), yo_, s1, f);
 838                 x_ += theFontMetrics(font).width(s1);
 839         }
 840
 841         if (s2.size() > 0) {
 842                 f.setColor(c2);
 843                 pi_.pain.text(int(x_), yo_, s2, f);
 844                 x_ += theFontMetrics(font).width(s2);
 845         }
 846 }
 847
 848 } // namespace lyx