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), change_(pi_.change_),
  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, return);
  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_.change_ = change_.changed() ? change_ : par_.lookupChange(pos);
 110
 111         int const x1 = int(x_);
 112         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 113         // insets are painted completely. Recursive
 114         inset->drawBackground(pi_, x1, yo_);
 115         inset->drawSelection(pi_, x1, yo_);
 116         inset->draw(pi_, x1, yo_);
 117
 118         Dimension const & dim = pm_.insetDimension(inset);
 119
 120         paintForeignMark(x_, font.language(), dim.descent());
 121
 122         x_ += dim.width();
 123
 124         // Restore full_repaint status.
 125         pi_.full_repaint = pi_full_repaint;
 126
 127 #ifdef DEBUG_METRICS
 128         int const x2 = x1 + dim.wid;
 129         int const y1 = yo_ + dim.des;
 130         int const y2 = yo_ - dim.asc;
 131         pi_.pain.line(x1, y1, x1, y2, Color_green);
 132         pi_.pain.line(x1, y1, x2, y1, Color_green);
 133         pi_.pain.line(x2, y1, x2, y2, Color_green);
 134         pi_.pain.line(x1, y2, x2, y2, Color_green);
 135 #endif
 136 }
 137
 138
 139 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 140 {
 141         pos_type pos = bidi_.vis2log(vpos);
 142
 143         docstring str;
 144
 145         // first char
 146         char_type c = par_.getChar(pos);
 147         str += c;
 148         ++vpos;
 149
 150         int const width = theFontMetrics(font).width(c);
 151         int dx = 0;
 152
 153         for (pos_type i = pos - 1; i >= 0; --i) {
 154                 c = par_.getChar(i);
 155                 if (!Encodings::isHebrewComposeChar(c)) {
 156                         if (isPrintableNonspace(c)) {
 157                                 int const width2 = pm_.singleWidth(i,
 158                                         text_metrics_.displayFont(pit_, i));
 159                                 dx = (c == 0x05e8 || // resh
 160                                       c == 0x05d3)   // dalet
 161                                         ? width2 - width
 162                                         : (width2 - width) / 2;
 163                         }
 164                         break;
 165                 }
 166         }
 167
 168         // Draw nikud
 169         pi_.pain.text(int(x_) + dx, yo_, str, font);
 170 }
 171
 172
 173 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 174 {
 175         pos_type pos = bidi_.vis2log(vpos);
 176         docstring str;
 177
 178         // first char
 179         char_type c = par_.getChar(pos);
 180         c = par_.transformChar(c, pos);
 181         str += c;
 182         ++vpos;
 183
 184         int const width = theFontMetrics(font).width(c);
 185         int dx = 0;
 186
 187         for (pos_type i = pos - 1; i >= 0; --i) {
 188                 c = par_.getChar(i);
 189                 if (!Encodings::isArabicComposeChar(c)) {
 190                         if (isPrintableNonspace(c)) {
 191                                 int const width2 = pm_.singleWidth(i,
 192                                                 text_metrics_.displayFont(pit_, i));
 193                                 dx = (width2 - width) / 2;
 194                         }
 195                         break;
 196                 }
 197         }
 198         // Draw nikud
 199         pi_.pain.text(int(x_) + dx, yo_, str, font);
 200 }
 201
 202
 203 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 204                             bool hebrew, bool arabic)
 205 {
 206         // This method takes up 70% of time when typing
 207         pos_type pos = bidi_.vis2log(vpos);
 208         // first character
 209         vector<char_type> str;
 210         str.reserve(100);
 211         str.push_back(par_.getChar(pos));
 212
 213         if (arabic) {
 214                 char_type c = str[0];
 215                 if (c == '(')
 216                         c = ')';
 217                 else if (c == ')')
 218                         c = '(';
 219                 str[0] = par_.transformChar(c, pos);
 220         }
 221
 222         pos_type const end = row_.endpos();
 223         FontSpan const font_span = par_.fontSpan(pos);
 224         // Track-change status.
 225         Change const & change_running = par_.lookupChange(pos);
 226
 227         // selected text?
 228         bool const selection = pos >= row_.sel_beg && pos < row_.sel_end;
 229
 230         char_type prev_char = ' ';
 231         // collect as much similar chars as we can
 232         for (++vpos ; vpos < end ; ++vpos) {
 233                 pos = bidi_.vis2log(vpos);
 234                 if (pos < font_span.first || pos > font_span.last)
 235                         break;
 236
 237                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 238                 if (new_selection != selection)
 239                         // Selection ends or starts here.
 240                         break;
 241
 242                 Change const & change = par_.lookupChange(pos);
 243                 if (!change_running.isSimilarTo(change))
 244                         // Track change type or author has changed.
 245                         break;
 246
 247                 char_type c = par_.getChar(pos);
 248
 249                 if (c == '\t' || prev_char == '\t') {
 250                         prev_char = c;
 251                         break;
 252                 }
 253
 254                 if (!isPrintableNonspace(c))
 255                         break;
 256
 257                 /* Because we do our own bidi, at this point the strings are
 258                  * already in visual order. However, Qt also applies its own
 259                  * bidi algorithm to strings that it paints to the screen.
 260                  * Therefore, if we were to paint Hebrew/Arabic words as a
 261                  * single string, the letters in the words would get reversed
 262                  * again. In order to avoid that, we don't collect Hebrew/
 263                  * Arabic characters, but rather paint them one at a time.
 264                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 265                  */
 266                 if (hebrew)
 267                         break;
 268
 269                 /* FIXME: these checks are irrelevant, since 'arabic' and
 270                  * 'hebrew' alone are already going to trigger a break.
 271                  * However, this should not be removed completely, because
 272                  * if an alternative solution is found which allows grouping
 273                  * of arabic and hebrew characters, then these breaks may have
 274                  * to be re-applied.
 275
 276                 if (arabic && Encodings::isArabicComposeChar(c))
 277                         break;
 278
 279                 if (hebrew && Encodings::isHebrewComposeChar(c))
 280                         break;
 281                 */
 282
 283                 if (arabic) {
 284                         if (c == '(')
 285                                 c = ')';
 286                         else if (c == ')')
 287                                 c = '(';
 288                         c = par_.transformChar(c, pos);
 289                         /* see comment in hebrew, explaining why we break */
 290                         break;
 291                 }
 292
 293                 str.push_back(c);
 294         }
 295
 296         docstring s(&str[0], str.size());
 297
 298         if (s[0] == '\t')
 299                 s.replace(0,1,from_ascii("    "));
 300
 301         if (!selection && !change_running.changed()) {
 302                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 303                 return;
 304         }
 305
 306         FontInfo copy = font;
 307         if (change_running.changed())
 308                 copy.setPaintColor(change_running.color());
 309         else if (selection)
 310                 copy.setPaintColor(Color_selectiontext);
 311
 312         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 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         Change const & change = par_.lookupChange(par_.size());
 595         if (change.changed()) {
 596                 FontMetrics const & fm =
 597                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 598                 int const length = fm.maxAscent() / 2;
 599                 Color col = change.color();
 600
 601                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 602                            Painter::line_solid, Painter::line_thick);
 603
 604                 if (change.deleted()) {
 605                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 606                                 yo_ + 2, col, Painter::line_solid, Painter::line_thick);
 607                 } else {
 608                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 609                                 yo_ + 2, col, Painter::line_solid, Painter::line_thick);
 610                 }
 611
 612         }
 613
 614         // draw an endlabel
 615
 616         switch (endlabel) {
 617         case END_LABEL_BOX:
 618         case END_LABEL_FILLED_BOX: {
 619                 FontInfo const font = labelFont();
 620                 FontMetrics const & fm = theFontMetrics(font);
 621                 int const size = int(0.75 * fm.maxAscent());
 622                 int const y = yo_ - size;
 623                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 624                 int x = is_rtl ? nestMargin() + changebarMargin()
 625                         : max_row_width - text_metrics_.rightMargin(pm_);
 626
 627                 // If needed, move the box a bit to avoid overlapping with text.
 628                 int const rem = max_row_width - row_.width();
 629                 if (rem <= 0)
 630                         x += is_rtl ? rem : - rem;
 631
 632                 if (endlabel == END_LABEL_BOX)
 633                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 634                 else
 635                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 636                 break;
 637         }
 638
 639         case END_LABEL_STATIC: {
 640                 FontInfo const font = labelFont();
 641                 FontMetrics const & fm = theFontMetrics(font);
 642                 docstring const & str = par_.layout().endlabelstring();
 643                 double const x = is_rtl ?
 644                         x_ - fm.width(str)
 645                         : - text_metrics_.rightMargin(pm_) - row_.width();
 646                 pi_.pain.text(int(x), yo_, str, font);
 647                 break;
 648         }
 649
 650         case END_LABEL_NO_LABEL:
 651                 break;
 652         }
 653 }
 654
 655
 656 void RowPainter::paintOnlyInsets()
 657 {
 658         pos_type const end = row_.endpos();
 659         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 660                 // If outer row has changed, nested insets are repaint completely.
 661                 Inset const * inset = par_.getInset(pos);
 662                 if (!inset)
 663                         continue;
 664                 if (x_ > pi_.base.bv->workWidth())
 665                         continue;
 666                 x_ = pi_.base.bv->coordCache().getInsets().x(inset);
 667
 668                 bool const pi_selected = pi_.selected;
 669                 Cursor const & cur = pi_.base.bv->cursor();
 670                 if (cur.selection() && cur.text() == &text_
 671                           && cur.anchor().text() == &text_)
 672                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 673                 paintInset(inset, pos);
 674                 pi_.selected = pi_selected;
 675         }
 676 }
 677
 678
 679 void RowPainter::paintText()
 680 {
 681         pos_type const end = row_.endpos();
 682         // Spaces at logical line breaks in bidi text must be skipped during
 683         // painting. However, they may appear visually in the middle
 684         // of a row; they must be skipped, wherever they are...
 685         // * logically "abc_[HEBREW_\nHEBREW]"
 686         // * visually "abc_[_WERBEH\nWERBEH]"
 687         pos_type skipped_sep_vpos = -1;
 688         pos_type body_pos = par_.beginOfBody();
 689         if (body_pos > 0 &&
 690                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 691                 body_pos = 0;
 692         }
 693
 694         Layout const & layout = par_.layout();
 695
 696         Change change_running;
 697         int change_last_x = 0;
 698
 699         // check for possible inline completion
 700         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 701         pos_type inlineCompletionVPos = -1;
 702         if (inlineCompletionPos.inTexted()
 703             && inlineCompletionPos.text() == &text_
 704             && inlineCompletionPos.pit() == pit_
 705             && inlineCompletionPos.pos() - 1 >= row_.pos()
 706             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 707                 // draw logically behind the previous character
 708                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 709         }
 710
 711         // Use font span to speed things up, see below
 712         FontSpan font_span;
 713         Font font;
 714
 715         // If the last logical character is a separator, don't paint it, unless
 716         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 717         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 718                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 719
 720         for (pos_type vpos = row_.pos(); vpos < end; ) {
 721                 if (x_ > pi_.base.bv->workWidth())
 722                         break;
 723
 724                 // Skip the separator at the logical end of the row
 725                 if (vpos == skipped_sep_vpos) {
 726                         ++vpos;
 727                         continue;
 728                 }
 729
 730                 pos_type const pos = bidi_.vis2log(vpos);
 731
 732                 if (pos >= par_.size()) {
 733                         ++vpos;
 734                         continue;
 735                 }
 736
 737                 // Use font span to speed things up, see above
 738                 if (vpos < font_span.first || vpos > font_span.last) {
 739                         font_span = par_.fontSpan(vpos);
 740                         font = text_metrics_.displayFont(pit_, vpos);
 741
 742                         // split font span if inline completion is inside
 743                         if (font_span.first <= inlineCompletionVPos
 744                             && font_span.last > inlineCompletionVPos)
 745                                 font_span.last = inlineCompletionVPos;
 746                 }
 747
 748                 const int width_pos = pm_.singleWidth(pos, font);
 749
 750                 if (x_ + width_pos < 0) {
 751                         x_ += width_pos;
 752                         ++vpos;
 753                         continue;
 754                 }
 755                 Change const & change = par_.lookupChange(pos);
 756                 if (change.changed() && !change_running.changed()) {
 757                         change_running = change;
 758                         change_last_x = int(x_);
 759                 }
 760
 761                 Inset const * inset = par_.getInset(pos);
 762                 bool const highly_editable_inset = inset
 763                         && inset->editable() == Inset::HIGHLY_EDITABLE;
 764
 765                 // If we reach the end of a change or if the author changes, paint it.
 766                 // We also don't paint across things like tables
 767                 if (change_running.changed() && (highly_editable_inset
 768                         || !change.changed() || !change_running.isSimilarTo(change))) {
 769                         // Calculate 1/3 height of the buffer's default font
 770                         FontMetrics const & fm
 771                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 772                         int const y_bar = change_running.deleted() ?
 773                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 774                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 775                                 change_running.color(), Painter::line_solid,
 776                                 Painter::line_thin);
 777
 778                         // Change might continue with a different author or type
 779                         if (change.changed() && !highly_editable_inset) {
 780                                 change_running = change;
 781                                 change_last_x = int(x_);
 782                         } else
 783                                 change_running.setUnchanged();
 784                 }
 785
 786                 if (body_pos > 0 && pos == body_pos - 1) {
 787                         int const lwidth = theFontMetrics(labelFont())
 788                                 .width(layout.labelsep);
 789
 790                         x_ += row_.label_hfill + lwidth - width_pos;
 791                 }
 792
 793                 // Is the inline completion in front of character?
 794                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 795                         paintInlineCompletion(font);
 796
 797                 if (par_.isSeparator(pos)) {
 798                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 799                         double const orig_x = x_;
 800                         x_ += width_pos;
 801                         if (pos >= body_pos)
 802                                 x_ += row_.separator;
 803                         paintForeignMark(orig_x, orig_font.language());
 804                         ++vpos;
 805
 806                 } else if (inset) {
 807                         // If outer row has changed, nested insets are repaint completely.
 808                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 809
 810                         bool const pi_selected = pi_.selected;
 811                         Cursor const & cur = pi_.base.bv->cursor();
 812                         if (cur.selection() && cur.text() == &text_
 813                                   && cur.anchor().text() == &text_)
 814                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 815                         paintInset(inset, pos);
 816                         pi_.selected = pi_selected;
 817                         ++vpos;
 818
 819                 } else {
 820                         // paint as many characters as possible.
 821                         paintFromPos(vpos);
 822                 }
 823
 824                 // Is the inline completion after character?
 825                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 826                         paintInlineCompletion(font);
 827         }
 828
 829         // if we reach the end of a struck out range, paint it
 830         if (change_running.changed()) {
 831                 FontMetrics const & fm
 832                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 833                 int const y_bar = change_running.deleted() ?
 834                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 835                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 836                         change_running.color(), Painter::line_solid, Painter::line_thin);
 837                 change_running.setUnchanged();
 838         }
 839 }
 840
 841
 842 void RowPainter::paintInlineCompletion(Font const & font)
 843 {
 844         docstring completion = pi_.base.bv->inlineCompletion();
 845         FontInfo f = font.fontInfo();
 846         bool rtl = font.isRightToLeft();
 847
 848         // draw the unique and the non-unique completion part
 849         // Note: this is not time-critical as it is
 850         // only done once per screen.
 851         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 852         docstring s1 = completion.substr(0, uniqueTo);
 853         docstring s2 = completion.substr(uniqueTo);
 854         ColorCode c1 = Color_inlinecompletion;
 855         ColorCode c2 = Color_nonunique_inlinecompletion;
 856
 857         // right to left?
 858         if (rtl) {
 859                 swap(s1, s2);
 860                 swap(c1, c2);
 861         }
 862
 863         if (s1.size() > 0) {
 864                 f.setColor(c1);
 865                 pi_.pain.text(int(x_), yo_, s1, f);
 866                 x_ += theFontMetrics(font).width(s1);
 867         }
 868
 869         if (s2.size() > 0) {
 870                 f.setColor(c2);
 871                 pi_.pain.text(int(x_), yo_, s2, f);
 872                 x_ += theFontMetrics(font).width(s2);
 873         }
 874 }
 875
 876 } // namespace lyx