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 #include <algorithm>
  14
  15 #include "rowpainter.h"
  16
  17 #include "Bidi.h"
  18 #include "Buffer.h"
  19 #include "CoordCache.h"
  20 #include "Cursor.h"
  21 #include "BufferParams.h"
  22 #include "BufferView.h"
  23 #include "Changes.h"
  24 #include "Encoding.h"
  25 #include "support/gettext.h"
  26 #include "Language.h"
  27 #include "Layout.h"
  28 #include "LyXRC.h"
  29 #include "Row.h"
  30 #include "MetricsInfo.h"
  31 #include "Paragraph.h"
  32 #include "ParagraphMetrics.h"
  33 #include "paragraph_funcs.h"
  34 #include "ParagraphParameters.h"
  35 #include "TextMetrics.h"
  36 #include "VSpace.h"
  37
  38 #include "frontends/FontMetrics.h"
  39 #include "frontends/Painter.h"
  40
  41 #include "insets/InsetText.h"
  42
  43 #include "support/debug.h"
  44 #include "support/textutils.h"
  45
  46 #include "support/lassert.h"
  47 #include <boost/crc.hpp>
  48
  49 using namespace std;
  50
  51 namespace lyx {
  52
  53 using frontend::Painter;
  54 using frontend::FontMetrics;
  55
  56 RowPainter::RowPainter(PainterInfo & pi,
  57         Text const & text, pit_type pit, Row const & row, Bidi & bidi, int x, int y)
  58         : pi_(pi), text_(text),
  59           text_metrics_(pi_.base.bv->textMetrics(&text)),
  60           pars_(text.paragraphs()),
  61           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  62           pm_(text_metrics_.parMetrics(pit)),
  63           bidi_(bidi), erased_(pi_.erased_),
  64           xo_(x), yo_(y), width_(text_metrics_.width())
  65 {
  66         bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
  67         x_ = row_.x + xo_;
  68
  69         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  70         //row_.dump();
  71
  72         LASSERT(pit >= 0, /**/);
  73         LASSERT(pit < int(text.paragraphs().size()), /**/);
  74 }
  75
  76
  77 FontInfo RowPainter::labelFont() const
  78 {
  79         return text_.labelFont(pi_.base.bv->buffer(), par_);
  80 }
  81
  82
  83 int RowPainter::leftMargin() const
  84 {
  85         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
  86                 row_.pos());
  87 }
  88
  89 // If you want to debug inset metrics uncomment the following line:
  90 //#define DEBUG_METRICS
  91 // This draws green lines around each inset.
  92
  93
  94 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
  95 {
  96         Font const font = text_metrics_.displayFont(pit_, pos);
  97
  98         LASSERT(inset, /**/);
  99         // Backup full_repaint status because some insets (InsetTabular)
 100         // requires a full repaint
 101         bool pi_full_repaint = pi_.full_repaint;
 102
 103         // FIXME: We should always use font, see documentation of
 104         // noFontChange() in Inset.h.
 105         pi_.base.font = inset->noFontChange() ?
 106                 pi_.base.bv->buffer().params().getFont().fontInfo() :
 107                 font.fontInfo();
 108         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 109         pi_.erased_ = erased_ || par_.isDeleted(pos);
 110         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 111         // insets are painted completely. Recursive
 112         inset->drawSelection(pi_, int(x_), yo_);
 113         inset->draw(pi_, int(x_), yo_);
 114
 115         Dimension const & dim = pm_.insetDimension(inset);
 116
 117         paintForeignMark(x_, font.language(), dim.descent());
 118
 119         x_ += dim.width();
 120
 121         // Restore full_repaint status.
 122         pi_.full_repaint = pi_full_repaint;
 123
 124 #ifdef DEBUG_METRICS
 125         int const x1 = int(x_ - dim.width());
 126         Dimension dim2;
 127         LASSERT(max_witdh_ > 0, /**/);
 128         int right_margin = text_metrics_.rightMargin(pm_);
 129         int const w = max_witdh_ - leftMargin() - right_margin;
 130         MetricsInfo mi(pi_.base.bv, font.fontInfo(), w);
 131         inset->metrics(mi, dim2);
 132         if (dim.wid != dim2.wid)
 133                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 134                        << " draw width " << dim.width()
 135                        << "> metrics width " << dim2.wid << "." << endl;
 136         if (dim->asc != dim2.asc)
 137                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 138                        << " draw ascent " << dim.ascent()
 139                        << "> metrics ascent " << dim2.asc << "." << endl;
 140         if (dim2.descent() != dim.des)
 141                 lyxerr << "Error: inset " << to_ascii(inset->getInsetName())
 142                        << " draw ascent " << dim.descent()
 143                        << "> metrics descent " << dim2.des << "." << endl;
 144         LASSERT(dim2.wid == dim.wid, /**/);
 145         LASSERT(dim2.asc == dim.asc, /**/);
 146         LASSERT(dim2.des == dim.des, /**/);
 147         int const x2 = x1 + dim.wid;
 148         int const y1 = yo_ + dim.des;
 149         int const y2 = yo_ - dim.asc;
 150         pi_.pain.line(x1, y1, x1, y2, Color_green);
 151         pi_.pain.line(x1, y1, x2, y1, Color_green);
 152         pi_.pain.line(x2, y1, x2, y2, Color_green);
 153         pi_.pain.line(x1, y2, x2, y2, Color_green);
 154 #endif
 155 }
 156
 157
 158 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 159 {
 160         pos_type pos = bidi_.vis2log(vpos);
 161
 162         docstring str;
 163
 164         // first char
 165         char_type c = par_.getChar(pos);
 166         str += c;
 167         ++vpos;
 168
 169         int const width = theFontMetrics(font).width(c);
 170         int dx = 0;
 171
 172         for (pos_type i = pos - 1; i >= 0; --i) {
 173                 c = par_.getChar(i);
 174                 if (!Encodings::isHebrewComposeChar(c)) {
 175                         if (isPrintableNonspace(c)) {
 176                                 int const width2 = pm_.singleWidth(i,
 177                                         text_metrics_.displayFont(pit_, i));
 178                                 dx = (c == 0x05e8 || // resh
 179                                       c == 0x05d3)   // dalet
 180                                         ? width2 - width
 181                                         : (width2 - width) / 2;
 182                         }
 183                         break;
 184                 }
 185         }
 186
 187         // Draw nikud
 188         pi_.pain.text(int(x_) + dx, yo_, str, font);
 189 }
 190
 191
 192 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 193 {
 194         pos_type pos = bidi_.vis2log(vpos);
 195         docstring str;
 196
 197         // first char
 198         char_type c = par_.getChar(pos);
 199         c = par_.transformChar(c, pos);
 200         str += c;
 201         ++vpos;
 202
 203         int const width = theFontMetrics(font).width(c);
 204         int dx = 0;
 205
 206         for (pos_type i = pos - 1; i >= 0; --i) {
 207                 c = par_.getChar(i);
 208                 if (!Encodings::isArabicComposeChar(c)) {
 209                         if (isPrintableNonspace(c)) {
 210                                 int const width2 = pm_.singleWidth(i,
 211                                                 text_metrics_.displayFont(pit_, i));
 212                                 dx = (width2 - width) / 2;
 213                         }
 214                         break;
 215                 }
 216         }
 217         // Draw nikud
 218         pi_.pain.text(int(x_) + dx, yo_, str, font);
 219 }
 220
 221
 222 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 223                             bool hebrew, bool arabic)
 224 {
 225         // This method takes up 70% of time when typing
 226         pos_type pos = bidi_.vis2log(vpos);
 227         pos_type const end = row_.endpos();
 228         FontSpan const font_span = par_.fontSpan(pos);
 229         Change::Type const prev_change = par_.lookupChange(pos).type;
 230
 231         // first character
 232         vector<char_type> str;
 233         str.reserve(100);
 234         str.push_back(par_.getChar(pos));
 235
 236         if (arabic) {
 237                 char_type c = str[0];
 238                 if (c == '(')
 239                         c = ')';
 240                 else if (c == ')')
 241                         c = '(';
 242                 str[0] = par_.transformChar(c, pos);
 243         }
 244
 245         // selected text?
 246         bool const selection = pos >= row_.sel_beg && pos < row_.sel_end;
 247
 248         // collect as much similar chars as we can
 249         for (++vpos ; vpos < end ; ++vpos) {
 250                 pos = bidi_.vis2log(vpos);
 251                 if (pos < font_span.first || pos > font_span.last)
 252                         break;
 253
 254                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 255                 if (selection != new_selection)
 256                         break;
 257
 258                 if (prev_change != par_.lookupChange(pos).type)
 259                         break;
 260
 261                 char_type c = par_.getChar(pos);
 262
 263                 if (!isPrintableNonspace(c))
 264                         break;
 265
 266                 /* Because we do our own bidi, at this point the strings are
 267                  * already in visual order. However, Qt also applies its own
 268                  * bidi algorithm to strings that it paints to the screen.
 269                  * Therefore, if we were to paint Hebrew/Arabic words as a
 270                  * single string, the letters in the words would get reversed
 271                  * again. In order to avoid that, we don't collect Hebrew/
 272                  * Arabic characters, but rather paint them one at a time.
 273                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 274                  */
 275                 if (hebrew)
 276                         break;
 277
 278                 /* FIXME: these checks are irrelevant, since 'arabic' and
 279                  * 'hebrew' alone are already going to trigger a break.
 280                  * However, this should not be removed completely, because
 281                  * if an alternative solution is found which allows grouping
 282                  * of arabic and hebrew characters, then these breaks may have
 283                  * to be re-applied.
 284
 285                 if (arabic && Encodings::isArabicComposeChar(c))
 286                         break;
 287
 288                 if (hebrew && Encodings::isHebrewComposeChar(c))
 289                         break;
 290                 */
 291
 292                 if (arabic) {
 293                         if (c == '(')
 294                                 c = ')';
 295                         else if (c == ')')
 296                                 c = '(';
 297                         c = par_.transformChar(c, pos);
 298                         /* see comment in hebrew, explaining why we break */
 299                         break;
 300                 }
 301
 302                 str.push_back(c);
 303         }
 304
 305         docstring s(&str[0], str.size());
 306
 307         if (selection || prev_change != Change::UNCHANGED) {
 308                 FontInfo copy = font;
 309                 if (selection) {
 310                         copy.setColor(Color_selectiontext);
 311                 } else if (prev_change == Change::DELETED) {
 312                         copy.setColor(Color_deletedtext);
 313                 } else if (prev_change == Change::INSERTED) {
 314                         copy.setColor(Color_addedtext);
 315                 }
 316                 x_ += pi_.pain.text(int(x_), yo_, s, copy);
 317         } else {
 318                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 319         }
 320 }
 321
 322
 323 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 324                 int desc)
 325 {
 326         if (!lyxrc.mark_foreign_language)
 327                 return;
 328         if (lang == latex_language)
 329                 return;
 330         if (lang == pi_.base.bv->buffer().params().language)
 331                 return;
 332
 333         int const y = yo_ + 1 + desc;
 334         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 335 }
 336
 337
 338 void RowPainter::paintFromPos(pos_type & vpos)
 339 {
 340         pos_type const pos = bidi_.vis2log(vpos);
 341         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 342         double const orig_x = x_;
 343
 344         // usual characters, no insets
 345         char_type const c = par_.getChar(pos);
 346
 347         // special case languages
 348         string const & lang = orig_font.language()->lang();
 349         bool const hebrew = lang == "hebrew";
 350         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 351                                                 lang == "farsi";
 352
 353         // draw as many chars as we can
 354         if ((!hebrew && !arabic)
 355                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 356                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 357                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 358         } else if (hebrew) {
 359                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 360         } else if (arabic) {
 361                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 362         }
 363
 364         paintForeignMark(orig_x, orig_font.language());
 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_metrics_.isLastRow(pit_, row_)
 383                 ? row_.ascent()
 384                 : row_.height();
 385
 386         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 387 }
 388
 389
 390 void RowPainter::paintAppendix()
 391 {
 392         // only draw the appendix frame once (for the main text)
 393         if (!par_.params().appendix() || !text_.isMainText(pi_.base.bv->buffer()))
 394                 return;
 395
 396         int y = yo_ - row_.ascent();
 397
 398         if (par_.params().startOfAppendix())
 399                 y += 2 * defaultRowHeight();
 400
 401         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 402         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 403 }
 404
 405
 406 void RowPainter::paintDepthBar()
 407 {
 408         depth_type const depth = par_.getDepth();
 409
 410         if (depth <= 0)
 411                 return;
 412
 413         depth_type prev_depth = 0;
 414         if (!text_metrics_.isFirstRow(pit_, row_)) {
 415                 pit_type pit2 = pit_;
 416                 if (row_.pos() == 0)
 417                         --pit2;
 418                 prev_depth = pars_[pit2].getDepth();
 419         }
 420
 421         depth_type next_depth = 0;
 422         if (!text_metrics_.isLastRow(pit_, row_)) {
 423                 pit_type pit2 = pit_;
 424                 if (row_.endpos() >= pars_[pit2].size())
 425                         ++pit2;
 426                 next_depth = pars_[pit2].getDepth();
 427         }
 428
 429         for (depth_type i = 1; i <= depth; ++i) {
 430                 int const w = nestMargin() / 5;
 431                 int x = int(xo_) + w * i;
 432                 // only consider the changebar space if we're drawing outermost text
 433                 if (text_.isMainText(pi_.base.bv->buffer()))
 434                         x += changebarMargin();
 435
 436                 int const starty = yo_ - row_.ascent();
 437                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 438
 439                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 440
 441                 if (i > prev_depth)
 442                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 443                 if (i > next_depth)
 444                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 445         }
 446 }
 447
 448
 449 int RowPainter::paintAppendixStart(int y)
 450 {
 451         FontInfo pb_font = sane_font;
 452         pb_font.setColor(Color_appendix);
 453         pb_font.decSize();
 454
 455         int w = 0;
 456         int a = 0;
 457         int d = 0;
 458
 459         docstring const label = _("Appendix");
 460         theFontMetrics(pb_font).rectText(label, w, a, d);
 461
 462         int const text_start = int(xo_ + (width_ - w) / 2);
 463         int const text_end = text_start + w;
 464
 465         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 466
 467         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 468         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 469
 470         return 3 * defaultRowHeight();
 471 }
 472
 473
 474 void RowPainter::paintFirst()
 475 {
 476         ParagraphParameters const & parparams = par_.params();
 477
 478         int y_top = 0;
 479
 480         // start of appendix?
 481         if (parparams.startOfAppendix())
 482                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 483
 484         Buffer const & buffer = pi_.base.bv->buffer();
 485         Layout const & layout = par_.layout();
 486
 487         if (buffer.params().paragraph_separation == BufferParams::ParagraphSkipSeparation) {
 488                 if (pit_ != 0) {
 489                         if (layout.latextype == LATEX_PARAGRAPH
 490                                 && !par_.getDepth()) {
 491                                 y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 492                         } else {
 493                                 Layout 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(*pi_.base.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 << 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                 FontInfo const font = labelFont();
 514                 FontMetrics const & fm = theFontMetrics(font);
 515
 516                 docstring const str = par_.labelString();
 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                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 542                         } else {
 543                                 if (is_rtl) {
 544                                         x = width_ - leftMargin()
 545                                                 + fm.width(layout.labelsep);
 546                                 } else {
 547                                         x = x_ - fm.width(layout.labelsep)
 548                                                 - fm.width(str);
 549                                 }
 550
 551                                 pi_.pain.text(int(x), yo_, str, font);
 552                         }
 553                 }
 554
 555         // the labels at the top of an environment.
 556         // More or less for bibliography
 557         } else if (is_seq &&
 558                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 559                 layout.labeltype == LABEL_BIBLIO ||
 560                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 561                 FontInfo const font = labelFont();
 562                 docstring const str = par_.labelString();
 563                 if (!str.empty()) {
 564                         double spacing_val = 1.0;
 565                         if (!parparams.spacing().isDefault())
 566                                 spacing_val = parparams.spacing().getValue();
 567                         else
 568                                 spacing_val = buffer.params().spacing().getValue();
 569
 570                         FontMetrics const & fm = theFontMetrics(font);
 571
 572                         int const labeladdon = int(fm.maxHeight()
 573                                 * layout.spacing.getValue() * spacing_val);
 574
 575                         int maxdesc =
 576                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 577                                 + (layout.labelbottomsep * defaultRowHeight()));
 578
 579                         double x = x_;
 580                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 581                                 if (is_rtl)
 582                                         x = leftMargin();
 583                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 584                                 x -= fm.width(str) / 2;
 585                         } else if (is_rtl) {
 586                                 x = width_ - leftMargin() -     fm.width(str);
 587                         }
 588                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 589                 }
 590         }
 591 }
 592
 593
 594 void RowPainter::paintLast()
 595 {
 596         bool const is_rtl = text_.isRTL(pi_.base.bv->buffer(), par_);
 597         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 598
 599         // paint imaginary end-of-paragraph character
 600
 601         if (par_.isInserted(par_.size()) || par_.isDeleted(par_.size())) {
 602                 FontMetrics const & fm = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 603                 int const length = fm.maxAscent() / 2;
 604                 ColorCode col = par_.isInserted(par_.size()) ? Color_addedtext : Color_deletedtext;
 605
 606                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 607                            Painter::line_solid, Painter::line_thick);
 608                 pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1, yo_ + 2, col,
 609                            Painter::line_solid, Painter::line_thick);
 610         }
 611
 612         // draw an endlabel
 613
 614         switch (endlabel) {
 615         case END_LABEL_BOX:
 616         case END_LABEL_FILLED_BOX: {
 617                 FontInfo const font = labelFont();
 618                 FontMetrics const & fm = theFontMetrics(font);
 619                 int const size = int(0.75 * fm.maxAscent());
 620                 int const y = yo_ - size;
 621                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 622                 int x = is_rtl ? nestMargin() + changebarMargin()
 623                         : max_row_width - text_metrics_.rightMargin(pm_);
 624
 625                 // If needed, move the box a bit to avoid overlapping with text.
 626                 int const rem = max_row_width - row_.width();
 627                 if (rem <= 0)
 628                         x += is_rtl ? rem : - rem;
 629
 630                 if (endlabel == END_LABEL_BOX)
 631                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 632                 else
 633                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 634                 break;
 635         }
 636
 637         case END_LABEL_STATIC: {
 638                 FontInfo const font = labelFont();
 639                 FontMetrics const & fm = theFontMetrics(font);
 640                 docstring const & str = par_.layout().endlabelstring();
 641                 double const x = is_rtl ?
 642                         x_ - fm.width(str)
 643                         : - text_metrics_.rightMargin(pm_) - row_.width();
 644                 pi_.pain.text(int(x), yo_, str, font);
 645                 break;
 646         }
 647
 648         case END_LABEL_NO_LABEL:
 649                 break;
 650         }
 651 }
 652
 653
 654 void RowPainter::paintOnlyInsets()
 655 {
 656         pos_type const end = row_.endpos();
 657         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 658                 // If outer row has changed, nested insets are repaint completely.
 659                 Inset const * inset = par_.getInset(pos);
 660                 if (!inset)
 661                         continue;
 662                 if (x_ > pi_.base.bv->workWidth())
 663                         continue;
 664                 x_ = pi_.base.bv->coordCache().getInsets().x(inset);
 665                 paintInset(inset, pos);
 666         }
 667 }
 668
 669
 670 void RowPainter::paintText()
 671 {
 672         pos_type const end = row_.endpos();
 673         // Spaces at logical line breaks in bidi text must be skipped during
 674         // painting. However, they may appear visually in the middle
 675         // of a row; they must be skipped, wherever they are...
 676         // * logically "abc_[HEBREW_\nHEBREW]"
 677         // * visually "abc_[_WERBEH\nWERBEH]"
 678         pos_type skipped_sep_vpos = -1;
 679         pos_type body_pos = par_.beginOfBody();
 680         if (body_pos > 0 &&
 681                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 682                 body_pos = 0;
 683         }
 684
 685         Layout const & layout = par_.layout();
 686
 687         bool running_strikeout = false;
 688         bool is_struckout = false;
 689         int last_strikeout_x = 0;
 690
 691         // check for possible inline completion
 692         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 693         pos_type inlineCompletionVPos = -1;
 694         if (inlineCompletionPos.inTexted()
 695             && inlineCompletionPos.text() == &text_
 696             && inlineCompletionPos.pit() == pit_
 697             && inlineCompletionPos.pos() - 1 >= row_.pos()
 698             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 699                 // draw logically behind the previous character
 700                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 701         }
 702
 703         // Use font span to speed things up, see below
 704         FontSpan font_span;
 705         Font font;
 706
 707         // If the last logical character is a separator, don't paint it, unless
 708         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 709         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 710                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 711
 712         for (pos_type vpos = row_.pos(); vpos < end; ) {
 713                 if (x_ > pi_.base.bv->workWidth())
 714                         break;
 715
 716                 // Skip the separator at the logical end of the row
 717                 if (vpos == skipped_sep_vpos) {
 718                         ++vpos;
 719                         continue;
 720                 }
 721
 722                 pos_type const pos = bidi_.vis2log(vpos);
 723
 724                 if (pos >= par_.size()) {
 725                         ++vpos;
 726                         continue;
 727                 }
 728
 729                 // Use font span to speed things up, see above
 730                 if (vpos < font_span.first || vpos > font_span.last) {
 731                         font_span = par_.fontSpan(vpos);
 732                         font = text_metrics_.displayFont(pit_, vpos);
 733
 734                         // split font span if inline completion is inside
 735                         if (font_span.first <= inlineCompletionVPos
 736                             && font_span.last > inlineCompletionVPos)
 737                                 font_span.last = inlineCompletionVPos;
 738                 }
 739
 740                 const int width_pos = pm_.singleWidth(pos, font);
 741
 742                 if (x_ + width_pos < 0) {
 743                         x_ += width_pos;
 744                         ++vpos;
 745                         continue;
 746                 }
 747
 748                 is_struckout = par_.isDeleted(pos);
 749
 750                 if (is_struckout && !running_strikeout) {
 751                         running_strikeout = true;
 752                         last_strikeout_x = int(x_);
 753                 }
 754
 755                 Inset const * inset = par_.getInset(pos);
 756                 bool const highly_editable_inset = inset
 757                         && inset->editable() == Inset::HIGHLY_EDITABLE;
 758
 759                 // If we reach the end of a struck out range, paint it.
 760                 // We also don't paint across things like tables
 761                 if (running_strikeout && (highly_editable_inset || !is_struckout)) {
 762                         // Calculate 1/3 height of the buffer's default font
 763                         FontMetrics const & fm
 764                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 765                         int const middle = yo_ - fm.maxAscent() / 3;
 766                         pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 767                                 Color_deletedtext, Painter::line_solid, Painter::line_thin);
 768                         running_strikeout = false;
 769                 }
 770
 771                 if (body_pos > 0 && pos == body_pos - 1) {
 772                         int const lwidth = theFontMetrics(labelFont())
 773                                 .width(layout.labelsep);
 774
 775                         x_ += row_.label_hfill + lwidth - width_pos;
 776                 }
 777
 778                 // Is the inline completion in front of character?
 779                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 780                         paintInlineCompletion(font);
 781
 782                 if (par_.isSeparator(pos)) {
 783                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 784                         double const orig_x = x_;
 785                         x_ += width_pos;
 786                         if (pos >= body_pos)
 787                                 x_ += row_.separator;
 788                         paintForeignMark(orig_x, orig_font.language());
 789                         ++vpos;
 790
 791                 } else if (inset) {
 792                         // If outer row has changed, nested insets are repaint completely.
 793                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 794                         paintInset(inset, pos);
 795                         ++vpos;
 796
 797                 } else {
 798                         // paint as many characters as possible.
 799                         paintFromPos(vpos);
 800                 }
 801
 802                 // Is the inline completion after character?
 803                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 804                         paintInlineCompletion(font);
 805         }
 806
 807         // if we reach the end of a struck out range, paint it
 808         if (running_strikeout) {
 809                 // calculate 1/3 height of the buffer's default font
 810                 FontMetrics const & fm
 811                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 812                 int const middle = yo_ - fm.maxAscent() / 3;
 813                 pi_.pain.line(last_strikeout_x, middle, int(x_), middle,
 814                         Color_deletedtext, Painter::line_solid, Painter::line_thin);
 815                 running_strikeout = false;
 816         }
 817 }
 818
 819
 820 void RowPainter::paintInlineCompletion(Font const & font)
 821 {
 822         docstring completion = pi_.base.bv->inlineCompletion();
 823         FontInfo f = font.fontInfo();
 824         bool rtl = font.isRightToLeft();
 825
 826         // draw the unique and the non-unique completion part
 827         // Note: this is not time-critical as it is
 828         // only done once per screen.
 829         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 830         docstring s1 = completion.substr(0, uniqueTo);
 831         docstring s2 = completion.substr(uniqueTo);
 832         ColorCode c1 = Color_inlinecompletion;
 833         ColorCode c2 = Color_nonunique_inlinecompletion;
 834
 835         // right to left?
 836         if (rtl) {
 837                 swap(s1, s2);
 838                 reverse(s1.begin(), s1.end());
 839                 reverse(s2.begin(), s2.end());
 840                 swap(c1, c2);
 841         }
 842
 843         if (s1.size() > 0) {
 844                 f.setColor(c1);
 845                 pi_.pain.text(int(x_), yo_, s1, f);
 846                 x_ += theFontMetrics(font).width(s1);
 847         }
 848
 849         if (s2.size() > 0) {
 850                 f.setColor(c2);
 851                 pi_.pain.text(int(x_), yo_, s2, f);
 852                 x_ += theFontMetrics(font).width(s2);
 853         }
 854 }
 855
 856 } // namespace lyx