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