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, 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_.erased_ = erased_ || par_.isDeleted(pos);
 110         int const x1 = int(x_);
 111         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 112         // insets are painted completely. Recursive
 113         inset->drawBackground(pi_, x1, yo_);
 114         inset->drawSelection(pi_, x1, yo_);
 115         inset->draw(pi_, x1, 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 x2 = x1 + dim.wid;
 128         int const y1 = yo_ + dim.des;
 129         int const y2 = yo_ - dim.asc;
 130         pi_.pain.line(x1, y1, x1, y2, Color_green);
 131         pi_.pain.line(x1, y1, x2, y1, Color_green);
 132         pi_.pain.line(x2, y1, x2, y2, Color_green);
 133         pi_.pain.line(x1, y2, x2, y2, Color_green);
 134 #endif
 135 }
 136
 137
 138 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 139 {
 140         pos_type pos = bidi_.vis2log(vpos);
 141
 142         docstring str;
 143
 144         // first char
 145         char_type c = par_.getChar(pos);
 146         str += c;
 147         ++vpos;
 148
 149         int const width = theFontMetrics(font).width(c);
 150         int dx = 0;
 151
 152         for (pos_type i = pos - 1; i >= 0; --i) {
 153                 c = par_.getChar(i);
 154                 if (!Encodings::isHebrewComposeChar(c)) {
 155                         if (isPrintableNonspace(c)) {
 156                                 int const width2 = pm_.singleWidth(i,
 157                                         text_metrics_.displayFont(pit_, i));
 158                                 dx = (c == 0x05e8 || // resh
 159                                       c == 0x05d3)   // dalet
 160                                         ? width2 - width
 161                                         : (width2 - width) / 2;
 162                         }
 163                         break;
 164                 }
 165         }
 166
 167         // Draw nikud
 168         pi_.pain.text(int(x_) + dx, yo_, str, font);
 169 }
 170
 171
 172 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 173 {
 174         pos_type pos = bidi_.vis2log(vpos);
 175         docstring str;
 176
 177         // first char
 178         char_type c = par_.getChar(pos);
 179         c = par_.transformChar(c, pos);
 180         str += c;
 181         ++vpos;
 182
 183         int const width = theFontMetrics(font).width(c);
 184         int dx = 0;
 185
 186         for (pos_type i = pos - 1; i >= 0; --i) {
 187                 c = par_.getChar(i);
 188                 if (!Encodings::isArabicComposeChar(c)) {
 189                         if (isPrintableNonspace(c)) {
 190                                 int const width2 = pm_.singleWidth(i,
 191                                                 text_metrics_.displayFont(pit_, i));
 192                                 dx = (width2 - width) / 2;
 193                         }
 194                         break;
 195                 }
 196         }
 197         // Draw nikud
 198         pi_.pain.text(int(x_) + dx, yo_, str, font);
 199 }
 200
 201
 202 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 203                             bool hebrew, bool arabic)
 204 {
 205         // This method takes up 70% of time when typing
 206         pos_type pos = bidi_.vis2log(vpos);
 207         // first character
 208         vector<char_type> str;
 209         str.reserve(100);
 210         str.push_back(par_.getChar(pos));
 211
 212         if (arabic) {
 213                 char_type c = str[0];
 214                 if (c == '(')
 215                         c = ')';
 216                 else if (c == ')')
 217                         c = '(';
 218                 str[0] = par_.transformChar(c, pos);
 219         }
 220
 221         pos_type const end = row_.endpos();
 222         FontSpan const font_span = par_.fontSpan(pos);
 223         // Track-change status.
 224         Change const & change_running = par_.lookupChange(pos);
 225
 226         // selected text?
 227         bool const selection = pos >= row_.sel_beg && pos < row_.sel_end;
 228
 229         char_type prev_char = ' ';
 230         // collect as much similar chars as we can
 231         for (++vpos ; vpos < end ; ++vpos) {
 232                 pos = bidi_.vis2log(vpos);
 233                 if (pos < font_span.first || pos > font_span.last)
 234                         break;
 235
 236                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 237                 if (new_selection != selection)
 238                         // Selection ends or starts here.
 239                         break;
 240
 241                 Change const & change = par_.lookupChange(pos);
 242                 if (!change_running.isSimilarTo(change))
 243                         // Track change type or author has changed.
 244                         break;
 245
 246                 char_type c = par_.getChar(pos);
 247
 248                 if (c == '\t' || prev_char == '\t') {
 249                         prev_char = c;
 250                         break;
 251                 }
 252
 253                 if (!isPrintableNonspace(c))
 254                         break;
 255
 256                 /* Because we do our own bidi, at this point the strings are
 257                  * already in visual order. However, Qt also applies its own
 258                  * bidi algorithm to strings that it paints to the screen.
 259                  * Therefore, if we were to paint Hebrew/Arabic words as a
 260                  * single string, the letters in the words would get reversed
 261                  * again. In order to avoid that, we don't collect Hebrew/
 262                  * Arabic characters, but rather paint them one at a time.
 263                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 264                  */
 265                 if (hebrew)
 266                         break;
 267
 268                 /* FIXME: these checks are irrelevant, since 'arabic' and
 269                  * 'hebrew' alone are already going to trigger a break.
 270                  * However, this should not be removed completely, because
 271                  * if an alternative solution is found which allows grouping
 272                  * of arabic and hebrew characters, then these breaks may have
 273                  * to be re-applied.
 274
 275                 if (arabic && Encodings::isArabicComposeChar(c))
 276                         break;
 277
 278                 if (hebrew && Encodings::isHebrewComposeChar(c))
 279                         break;
 280                 */
 281
 282                 if (arabic) {
 283                         if (c == '(')
 284                                 c = ')';
 285                         else if (c == ')')
 286                                 c = '(';
 287                         c = par_.transformChar(c, pos);
 288                         /* see comment in hebrew, explaining why we break */
 289                         break;
 290                 }
 291
 292                 str.push_back(c);
 293         }
 294
 295         docstring s(&str[0], str.size());
 296
 297         if (s[0] == '\t')
 298                 s.replace(0,1,from_ascii("    "));
 299
 300         if (!selection && !change_running.changed()) {
 301                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 302                 return;
 303         }
 304
 305         FontInfo copy = font;
 306         if (change_running.changed())
 307                 copy.setDrawColor(change_running.color());
 308         else if (selection)
 309                 copy.setDrawColor(Color_selectiontext);
 310
 311         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 312 }
 313
 314
 315 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 316                 int desc)
 317 {
 318         if (!lyxrc.mark_foreign_language)
 319                 return;
 320         if (lang == latex_language)
 321                 return;
 322         if (lang == pi_.base.bv->buffer().params().language)
 323                 return;
 324
 325         int const y = yo_ + 1 + desc;
 326         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 327 }
 328
 329
 330 void RowPainter::paintFromPos(pos_type & vpos)
 331 {
 332         pos_type const pos = bidi_.vis2log(vpos);
 333         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 334         double const orig_x = x_;
 335
 336         // usual characters, no insets
 337         char_type const c = par_.getChar(pos);
 338
 339         // special case languages
 340         string const & lang = orig_font.language()->lang();
 341         bool const hebrew = lang == "hebrew";
 342         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 343                                                 lang == "farsi";
 344
 345         // draw as many chars as we can
 346         if ((!hebrew && !arabic)
 347                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 348                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 349                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 350         } else if (hebrew) {
 351                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 352         } else if (arabic) {
 353                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 354         }
 355
 356         paintForeignMark(orig_x, orig_font.language());
 357 }
 358
 359
 360 void RowPainter::paintChangeBar()
 361 {
 362         pos_type const start = row_.pos();
 363         pos_type end = row_.endpos();
 364
 365         if (par_.size() == end) {
 366                 // this is the last row of the paragraph;
 367                 // thus, we must also consider the imaginary end-of-par character
 368                 end++;
 369         }
 370
 371         if (start == end || !par_.isChanged(start, end))
 372                 return;
 373
 374         int const height = text_metrics_.isLastRow(pit_, row_)
 375                 ? row_.ascent()
 376                 : row_.height();
 377
 378         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 379 }
 380
 381
 382 void RowPainter::paintAppendix()
 383 {
 384         // only draw the appendix frame once (for the main text)
 385         if (!par_.params().appendix() || !text_.isMainText(pi_.base.bv->buffer()))
 386                 return;
 387
 388         int y = yo_ - row_.ascent();
 389
 390         if (par_.params().startOfAppendix())
 391                 y += 2 * defaultRowHeight();
 392
 393         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 394         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 395 }
 396
 397
 398 void RowPainter::paintDepthBar()
 399 {
 400         depth_type const depth = par_.getDepth();
 401
 402         if (depth <= 0)
 403                 return;
 404
 405         depth_type prev_depth = 0;
 406         if (!text_metrics_.isFirstRow(pit_, row_)) {
 407                 pit_type pit2 = pit_;
 408                 if (row_.pos() == 0)
 409                         --pit2;
 410                 prev_depth = pars_[pit2].getDepth();
 411         }
 412
 413         depth_type next_depth = 0;
 414         if (!text_metrics_.isLastRow(pit_, row_)) {
 415                 pit_type pit2 = pit_;
 416                 if (row_.endpos() >= pars_[pit2].size())
 417                         ++pit2;
 418                 next_depth = pars_[pit2].getDepth();
 419         }
 420
 421         for (depth_type i = 1; i <= depth; ++i) {
 422                 int const w = nestMargin() / 5;
 423                 int x = int(xo_) + w * i;
 424                 // only consider the changebar space if we're drawing outermost text
 425                 if (text_.isMainText(pi_.base.bv->buffer()))
 426                         x += changebarMargin();
 427
 428                 int const starty = yo_ - row_.ascent();
 429                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 430
 431                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 432
 433                 if (i > prev_depth)
 434                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 435                 if (i > next_depth)
 436                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 437         }
 438 }
 439
 440
 441 int RowPainter::paintAppendixStart(int y)
 442 {
 443         FontInfo pb_font = sane_font;
 444         pb_font.setColor(Color_appendix);
 445         pb_font.decSize();
 446
 447         int w = 0;
 448         int a = 0;
 449         int d = 0;
 450
 451         docstring const label = _("Appendix");
 452         theFontMetrics(pb_font).rectText(label, w, a, d);
 453
 454         int const text_start = int(xo_ + (width_ - w) / 2);
 455         int const text_end = text_start + w;
 456
 457         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 458
 459         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 460         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 461
 462         return 3 * defaultRowHeight();
 463 }
 464
 465
 466 void RowPainter::paintFirst()
 467 {
 468         ParagraphParameters const & parparams = par_.params();
 469
 470         int y_top = 0;
 471
 472         // start of appendix?
 473         if (parparams.startOfAppendix())
 474                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 475
 476         Buffer const & buffer = pi_.base.bv->buffer();
 477         Layout const & layout = par_.layout();
 478
 479         if (buffer.params().paragraph_separation == BufferParams::ParagraphSkipSeparation) {
 480                 if (pit_ != 0) {
 481                         if (layout.latextype == LATEX_PARAGRAPH
 482                                 && !par_.getDepth()) {
 483                                 y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 484                         } else {
 485                                 Layout const & playout = pars_[pit_ - 1].layout();
 486                                 if (playout.latextype == LATEX_PARAGRAPH
 487                                         && !pars_[pit_ - 1].getDepth()) {
 488                                         // is it right to use defskip here, too? (AS)
 489                                         y_top += buffer.params().getDefSkip().inPixels(*pi_.base.bv);
 490                                 }
 491                         }
 492                 }
 493         }
 494
 495         bool const is_rtl = text_.isRTL(buffer, par_);
 496         bool const is_seq = isFirstInSequence(pit_, text_.paragraphs());
 497         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 498
 499         // should we print a label?
 500         if (layout.labeltype >= LABEL_STATIC
 501             && (layout.labeltype != LABEL_STATIC
 502                       || layout.latextype != LATEX_ENVIRONMENT
 503                       || is_seq)) {
 504
 505                 FontInfo const font = labelFont();
 506                 FontMetrics const & fm = theFontMetrics(font);
 507
 508                 docstring const str = par_.labelString();
 509                 if (!str.empty()) {
 510                         double x = x_;
 511
 512                         // this is special code for the chapter layout. This is
 513                         // printed in an extra row and has a pagebreak at
 514                         // the top.
 515                         if (layout.counter == "chapter") {
 516                                 double spacing_val = 1.0;
 517                                 if (!parparams.spacing().isDefault()) {
 518                                         spacing_val = parparams.spacing().getValue();
 519                                 } else {
 520                                         spacing_val = buffer.params().spacing().getValue();
 521                                 }
 522
 523                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 524
 525                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 526                                         + int(layout.parsep) * defaultRowHeight();
 527
 528                                 if (is_rtl) {
 529                                         x = width_ - leftMargin() -
 530                                                 fm.width(str);
 531                                 }
 532
 533                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 534                         } else {
 535                                 if (is_rtl) {
 536                                         x = width_ - leftMargin()
 537                                                 + fm.width(layout.labelsep);
 538                                 } else {
 539                                         x = x_ - fm.width(layout.labelsep)
 540                                                 - fm.width(str);
 541                                 }
 542
 543                                 pi_.pain.text(int(x), yo_, str, font);
 544                         }
 545                 }
 546
 547         // the labels at the top of an environment.
 548         // More or less for bibliography
 549         } else if (is_seq &&
 550                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 551                 layout.labeltype == LABEL_BIBLIO ||
 552                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 553                 FontInfo const font = labelFont();
 554                 docstring const str = par_.labelString();
 555                 if (!str.empty()) {
 556                         double spacing_val = 1.0;
 557                         if (!parparams.spacing().isDefault())
 558                                 spacing_val = parparams.spacing().getValue();
 559                         else
 560                                 spacing_val = buffer.params().spacing().getValue();
 561
 562                         FontMetrics const & fm = theFontMetrics(font);
 563
 564                         int const labeladdon = int(fm.maxHeight()
 565                                 * layout.spacing.getValue() * spacing_val);
 566
 567                         int maxdesc =
 568                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 569                                 + (layout.labelbottomsep * defaultRowHeight()));
 570
 571                         double x = x_;
 572                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 573                                 if (is_rtl)
 574                                         x = leftMargin();
 575                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 576                                 x -= fm.width(str) / 2;
 577                         } else if (is_rtl) {
 578                                 x = width_ - leftMargin() -     fm.width(str);
 579                         }
 580                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 581                 }
 582         }
 583 }
 584
 585
 586 void RowPainter::paintLast()
 587 {
 588         bool const is_rtl = text_.isRTL(pi_.base.bv->buffer(), par_);
 589         int const endlabel = getEndLabel(pit_, text_.paragraphs());
 590
 591         // paint imaginary end-of-paragraph character
 592
 593         Change const & change = par_.lookupChange(par_.size());
 594         if (change.changed()) {
 595                 FontMetrics const & fm =
 596                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 597                 int const length = fm.maxAscent() / 2;
 598                 Color col = change.color();
 599
 600                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 601                            Painter::line_solid, Painter::line_thick);
 602
 603                 if (change.deleted()) {
 604                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 605                                 yo_ + 2, col, Painter::line_solid, Painter::line_thick);
 606                 } else {
 607                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 608                                 yo_ + 2, col, Painter::line_solid, Painter::line_thick);
 609                 }
 610
 611         }
 612
 613         // draw an endlabel
 614
 615         switch (endlabel) {
 616         case END_LABEL_BOX:
 617         case END_LABEL_FILLED_BOX: {
 618                 FontInfo const font = labelFont();
 619                 FontMetrics const & fm = theFontMetrics(font);
 620                 int const size = int(0.75 * fm.maxAscent());
 621                 int const y = yo_ - size;
 622                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 623                 int x = is_rtl ? nestMargin() + changebarMargin()
 624                         : max_row_width - text_metrics_.rightMargin(pm_);
 625
 626                 // If needed, move the box a bit to avoid overlapping with text.
 627                 int const rem = max_row_width - row_.width();
 628                 if (rem <= 0)
 629                         x += is_rtl ? rem : - rem;
 630
 631                 if (endlabel == END_LABEL_BOX)
 632                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 633                 else
 634                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 635                 break;
 636         }
 637
 638         case END_LABEL_STATIC: {
 639                 FontInfo const font = labelFont();
 640                 FontMetrics const & fm = theFontMetrics(font);
 641                 docstring const & str = par_.layout().endlabelstring();
 642                 double const x = is_rtl ?
 643                         x_ - fm.width(str)
 644                         : - text_metrics_.rightMargin(pm_) - row_.width();
 645                 pi_.pain.text(int(x), yo_, str, font);
 646                 break;
 647         }
 648
 649         case END_LABEL_NO_LABEL:
 650                 break;
 651         }
 652 }
 653
 654
 655 void RowPainter::paintOnlyInsets()
 656 {
 657         pos_type const end = row_.endpos();
 658         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 659                 // If outer row has changed, nested insets are repaint completely.
 660                 Inset const * inset = par_.getInset(pos);
 661                 if (!inset)
 662                         continue;
 663                 if (x_ > pi_.base.bv->workWidth())
 664                         continue;
 665                 x_ = pi_.base.bv->coordCache().getInsets().x(inset);
 666
 667                 bool const pi_selected = pi_.selected;
 668                 Cursor const & cur = pi_.base.bv->cursor();
 669                 if (cur.selection() && cur.text() == &text_
 670                           && cur.anchor().text() == &text_)
 671                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 672                 paintInset(inset, pos);
 673                 pi_.selected = pi_selected;
 674         }
 675 }
 676
 677
 678 void RowPainter::paintText()
 679 {
 680         pos_type const end = row_.endpos();
 681         // Spaces at logical line breaks in bidi text must be skipped during
 682         // painting. However, they may appear visually in the middle
 683         // of a row; they must be skipped, wherever they are...
 684         // * logically "abc_[HEBREW_\nHEBREW]"
 685         // * visually "abc_[_WERBEH\nWERBEH]"
 686         pos_type skipped_sep_vpos = -1;
 687         pos_type body_pos = par_.beginOfBody();
 688         if (body_pos > 0 &&
 689                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 690                 body_pos = 0;
 691         }
 692
 693         Layout const & layout = par_.layout();
 694
 695         Change change_running;
 696         int change_last_x = 0;
 697
 698         // check for possible inline completion
 699         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 700         pos_type inlineCompletionVPos = -1;
 701         if (inlineCompletionPos.inTexted()
 702             && inlineCompletionPos.text() == &text_
 703             && inlineCompletionPos.pit() == pit_
 704             && inlineCompletionPos.pos() - 1 >= row_.pos()
 705             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 706                 // draw logically behind the previous character
 707                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 708         }
 709
 710         // Use font span to speed things up, see below
 711         FontSpan font_span;
 712         Font font;
 713
 714         // If the last logical character is a separator, don't paint it, unless
 715         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 716         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 717                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 718
 719         for (pos_type vpos = row_.pos(); vpos < end; ) {
 720                 if (x_ > pi_.base.bv->workWidth())
 721                         break;
 722
 723                 // Skip the separator at the logical end of the row
 724                 if (vpos == skipped_sep_vpos) {
 725                         ++vpos;
 726                         continue;
 727                 }
 728
 729                 pos_type const pos = bidi_.vis2log(vpos);
 730
 731                 if (pos >= par_.size()) {
 732                         ++vpos;
 733                         continue;
 734                 }
 735
 736                 // Use font span to speed things up, see above
 737                 if (vpos < font_span.first || vpos > font_span.last) {
 738                         font_span = par_.fontSpan(vpos);
 739                         font = text_metrics_.displayFont(pit_, vpos);
 740
 741                         // split font span if inline completion is inside
 742                         if (font_span.first <= inlineCompletionVPos
 743                             && font_span.last > inlineCompletionVPos)
 744                                 font_span.last = inlineCompletionVPos;
 745                 }
 746
 747                 const int width_pos = pm_.singleWidth(pos, font);
 748
 749                 if (x_ + width_pos < 0) {
 750                         x_ += width_pos;
 751                         ++vpos;
 752                         continue;
 753                 }
 754                 Change const & change = par_.lookupChange(pos);
 755                 if (change.changed() && !change_running.changed()) {
 756                         change_running = change;
 757                         change_last_x = int(x_);
 758                 }
 759
 760                 Inset const * inset = par_.getInset(pos);
 761                 bool const highly_editable_inset = inset
 762                         && inset->editable() == Inset::HIGHLY_EDITABLE;
 763
 764                 // If we reach the end of a change or if the author changes, paint it.
 765                 // We also don't paint across things like tables
 766                 if (change_running.changed() && (highly_editable_inset
 767                         || !change.changed() || !change_running.isSimilarTo(change))) {
 768                         // Calculate 1/3 height of the buffer's default font
 769                         FontMetrics const & fm
 770                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 771                         int const y_bar = change_running.deleted() ?
 772                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 773                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 774                                 change_running.color(), Painter::line_solid,
 775                                 Painter::line_thin);
 776
 777                         // Change might continue with a different author or type
 778                         if (change.changed() && !highly_editable_inset) {
 779                                 change_running = change;
 780                                 change_last_x = int(x_);
 781                         } else
 782                                 change_running.setUnchanged();
 783                 }
 784
 785                 if (body_pos > 0 && pos == body_pos - 1) {
 786                         int const lwidth = theFontMetrics(labelFont())
 787                                 .width(layout.labelsep);
 788
 789                         x_ += row_.label_hfill + lwidth - width_pos;
 790                 }
 791
 792                 // Is the inline completion in front of character?
 793                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 794                         paintInlineCompletion(font);
 795
 796                 if (par_.isSeparator(pos)) {
 797                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 798                         double const orig_x = x_;
 799                         x_ += width_pos;
 800                         if (pos >= body_pos)
 801                                 x_ += row_.separator;
 802                         paintForeignMark(orig_x, orig_font.language());
 803                         ++vpos;
 804
 805                 } else if (inset) {
 806                         // If outer row has changed, nested insets are repaint completely.
 807                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 808
 809                         bool const pi_selected = pi_.selected;
 810                         Cursor const & cur = pi_.base.bv->cursor();
 811                         if (cur.selection() && cur.text() == &text_
 812                                   && cur.anchor().text() == &text_)
 813                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 814                         paintInset(inset, pos);
 815                         pi_.selected = pi_selected;
 816                         ++vpos;
 817
 818                 } else {
 819                         // paint as many characters as possible.
 820                         paintFromPos(vpos);
 821                 }
 822
 823                 // Is the inline completion after character?
 824                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 825                         paintInlineCompletion(font);
 826         }
 827
 828         // if we reach the end of a struck out range, paint it
 829         if (change_running.changed()) {
 830                 FontMetrics const & fm
 831                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 832                 int const y_bar = change_running.deleted() ?
 833                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 834                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 835                         change_running.color(), Painter::line_solid, Painter::line_thin);
 836                 change_running.setUnchanged();
 837         }
 838 }
 839
 840
 841 void RowPainter::paintInlineCompletion(Font const & font)
 842 {
 843         docstring completion = pi_.base.bv->inlineCompletion();
 844         FontInfo f = font.fontInfo();
 845         bool rtl = font.isRightToLeft();
 846
 847         // draw the unique and the non-unique completion part
 848         // Note: this is not time-critical as it is
 849         // only done once per screen.
 850         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 851         docstring s1 = completion.substr(0, uniqueTo);
 852         docstring s2 = completion.substr(uniqueTo);
 853         ColorCode c1 = Color_inlinecompletion;
 854         ColorCode c2 = Color_nonunique_inlinecompletion;
 855
 856         // right to left?
 857         if (rtl) {
 858                 swap(s1, s2);
 859                 swap(c1, c2);
 860         }
 861
 862         if (s1.size() > 0) {
 863                 f.setColor(c1);
 864                 pi_.pain.text(int(x_), yo_, s1, f);
 865                 x_ += theFontMetrics(font).width(s1);
 866         }
 867
 868         if (s2.size() > 0) {
 869                 f.setColor(c2);
 870                 pi_.pain.text(int(x_), yo_, s2, f);
 871                 x_ += theFontMetrics(font).width(s2);
 872         }
 873 }
 874
 875 } // namespace lyx