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 "Language.h"
  26 #include "Layout.h"
  27 #include "LyXRC.h"
  28 #include "Row.h"
  29 #include "MetricsInfo.h"
  30 #include "Paragraph.h"
  31 #include "ParagraphMetrics.h"
  32 #include "ParagraphParameters.h"
  33 #include "TextMetrics.h"
  34 #include "VSpace.h"
  35
  36 #include "frontends/FontMetrics.h"
  37 #include "frontends/Painter.h"
  38
  39 #include "insets/InsetText.h"
  40
  41 #include "support/debug.h"
  42 #include "support/gettext.h"
  43 #include "support/textutils.h"
  44
  45 #include "support/lassert.h"
  46 #include <boost/crc.hpp>
  47
  48 using namespace std;
  49
  50 namespace lyx {
  51
  52 using frontend::Painter;
  53 using frontend::FontMetrics;
  54
  55 RowPainter::RowPainter(PainterInfo & pi,
  56         Text const & text, pit_type pit, Row const & row, Bidi & bidi, int x, int y)
  57         : pi_(pi), text_(text),
  58           text_metrics_(pi_.base.bv->textMetrics(&text)),
  59           pars_(text.paragraphs()),
  60           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  61           pm_(text_metrics_.parMetrics(pit)),
  62           bidi_(bidi), change_(pi_.change_),
  63           xo_(x), yo_(y), width_(text_metrics_.width())
  64 {
  65         bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
  66         x_ = row_.x + xo_;
  67
  68         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  69         //row_.dump();
  70
  71         LASSERT(pit >= 0, /**/);
  72         LASSERT(pit < int(text.paragraphs().size()), /**/);
  73 }
  74
  75
  76 FontInfo RowPainter::labelFont() const
  77 {
  78         FontInfo f = text_.labelFont(par_);
  79         // selected text?
  80         if (row_.begin_margin_sel || pi_.selected)
  81                 f.setPaintColor(Color_selectiontext);
  82         return f;
  83 }
  84
  85
  86 int RowPainter::leftMargin() const
  87 {
  88         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
  89                 row_.pos());
  90 }
  91
  92 // If you want to debug inset metrics uncomment the following line:
  93 //#define DEBUG_METRICS
  94 // This draws green lines around each inset.
  95
  96
  97 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
  98 {
  99         Font const font = text_metrics_.displayFont(pit_, pos);
 100
 101         LASSERT(inset, return);
 102         // Backup full_repaint status because some insets (InsetTabular)
 103         // requires a full repaint
 104         bool pi_full_repaint = pi_.full_repaint;
 105
 106         // FIXME: text_metrics_.width() is only about 1.0857 * mi.base.textwidth
 107         pi_.base.textwidth = text_metrics_.width();
 108
 109         // FIXME: We should always use font, see documentation of
 110         // noFontChange() in Inset.h.
 111         pi_.base.font = inset->noFontChange() ?
 112                 pi_.base.bv->buffer().params().getFont().fontInfo() :
 113                 font.fontInfo();
 114         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 115         pi_.change_ = change_.changed() ? change_ : par_.lookupChange(pos);
 116
 117         int const x1 = int(x_);
 118         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 119         // insets are painted completely. Recursive
 120         inset->drawBackground(pi_, x1, yo_);
 121         inset->drawSelection(pi_, x1, yo_);
 122         inset->draw(pi_, x1, yo_);
 123
 124         Dimension const & dim = pm_.insetDimension(inset);
 125
 126         paintForeignMark(x_, font.language(), dim.descent());
 127
 128         x_ += dim.width();
 129
 130         // Restore full_repaint status.
 131         pi_.full_repaint = pi_full_repaint;
 132
 133 #ifdef DEBUG_METRICS
 134         int const x2 = x1 + dim.wid;
 135         int const y1 = yo_ + dim.des;
 136         int const y2 = yo_ - dim.asc;
 137         pi_.pain.line(x1, y1, x1, y2, Color_green);
 138         pi_.pain.line(x1, y1, x2, y1, Color_green);
 139         pi_.pain.line(x2, y1, x2, y2, Color_green);
 140         pi_.pain.line(x1, y2, x2, y2, Color_green);
 141 #endif
 142 }
 143
 144
 145 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 146 {
 147         pos_type pos = bidi_.vis2log(vpos);
 148
 149         docstring str;
 150
 151         // first char
 152         char_type c = par_.getChar(pos);
 153         str += c;
 154         ++vpos;
 155
 156         int const width = theFontMetrics(font).width(c);
 157         int dx = 0;
 158
 159         for (pos_type i = pos - 1; i >= 0; --i) {
 160                 c = par_.getChar(i);
 161                 if (!Encodings::isHebrewComposeChar(c)) {
 162                         if (isPrintableNonspace(c)) {
 163                                 int const width2 = pm_.singleWidth(i,
 164                                         text_metrics_.displayFont(pit_, i));
 165                                 dx = (c == 0x05e8 || // resh
 166                                       c == 0x05d3)   // dalet
 167                                         ? width2 - width
 168                                         : (width2 - width) / 2;
 169                         }
 170                         break;
 171                 }
 172         }
 173
 174         // Draw nikud
 175         pi_.pain.text(int(x_) + dx, yo_, str, font);
 176 }
 177
 178
 179 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 180 {
 181         pos_type pos = bidi_.vis2log(vpos);
 182         docstring str;
 183
 184         // first char
 185         char_type c = par_.getChar(pos);
 186         c = par_.transformChar(c, pos);
 187         str += c;
 188         ++vpos;
 189
 190         int const width = theFontMetrics(font).width(c);
 191         int dx = 0;
 192
 193         for (pos_type i = pos - 1; i >= 0; --i) {
 194                 c = par_.getChar(i);
 195                 if (!Encodings::isArabicComposeChar(c)) {
 196                         if (isPrintableNonspace(c)) {
 197                                 int const width2 = pm_.singleWidth(i,
 198                                                 text_metrics_.displayFont(pit_, i));
 199                                 dx = (width2 - width) / 2;
 200                         }
 201                         break;
 202                 }
 203         }
 204         // Draw nikud
 205         pi_.pain.text(int(x_) + dx, yo_, str, font);
 206 }
 207
 208
 209 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 210                             bool hebrew, bool arabic)
 211 {
 212         // This method takes up 70% of time when typing
 213         pos_type pos = bidi_.vis2log(vpos);
 214         // first character
 215         vector<char_type> str;
 216         str.reserve(100);
 217         str.push_back(par_.getChar(pos));
 218
 219         if (arabic) {
 220                 char_type c = str[0];
 221                 if (c == '(')
 222                         c = ')';
 223                 else if (c == ')')
 224                         c = '(';
 225                 str[0] = par_.transformChar(c, pos);
 226         }
 227
 228         pos_type const end = row_.endpos();
 229         FontSpan const font_span = par_.fontSpan(pos);
 230         // Track-change status.
 231         Change const & change_running = par_.lookupChange(pos);
 232
 233         // selected text?
 234         bool const selection = (pos >= row_.sel_beg && pos < row_.sel_end)
 235                 || pi_.selected;
 236
 237         // spelling correct?
 238         bool const spell_state =
 239                 lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 240
 241         char_type prev_char = ' ';
 242         // collect as much similar chars as we can
 243         for (++vpos ; vpos < end ; ++vpos) {
 244                 pos = bidi_.vis2log(vpos);
 245                 if (pos < font_span.first || pos > font_span.last)
 246                         break;
 247
 248                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 249                 if (new_selection != selection)
 250                         // Selection ends or starts here.
 251                         break;
 252
 253                 bool const new_spell_state =
 254                         lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 255                 if (new_spell_state != spell_state)
 256                         // Spell checker state changed here.
 257                         break;
 258
 259                 Change const & change = par_.lookupChange(pos);
 260                 if (!change_running.isSimilarTo(change))
 261                         // Track change type or author has changed.
 262                         break;
 263
 264                 char_type c = par_.getChar(pos);
 265
 266                 if (c == '\t' || prev_char == '\t') {
 267                         prev_char = c;
 268                         break;
 269                 }
 270
 271                 if (!isPrintableNonspace(c))
 272                         break;
 273
 274                 /* Because we do our own bidi, at this point the strings are
 275                  * already in visual order. However, Qt also applies its own
 276                  * bidi algorithm to strings that it paints to the screen.
 277                  * Therefore, if we were to paint Hebrew/Arabic words as a
 278                  * single string, the letters in the words would get reversed
 279                  * again. In order to avoid that, we don't collect Hebrew/
 280                  * Arabic characters, but rather paint them one at a time.
 281                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 282                  */
 283                 if (hebrew)
 284                         break;
 285
 286                 /* FIXME: these checks are irrelevant, since 'arabic' and
 287                  * 'hebrew' alone are already going to trigger a break.
 288                  * However, this should not be removed completely, because
 289                  * if an alternative solution is found which allows grouping
 290                  * of arabic and hebrew characters, then these breaks may have
 291                  * to be re-applied.
 292
 293                 if (arabic && Encodings::isArabicComposeChar(c))
 294                         break;
 295
 296                 if (hebrew && Encodings::isHebrewComposeChar(c))
 297                         break;
 298                 */
 299
 300                 if (arabic) {
 301                         if (c == '(')
 302                                 c = ')';
 303                         else if (c == ')')
 304                                 c = '(';
 305                         c = par_.transformChar(c, pos);
 306                         /* see comment in hebrew, explaining why we break */
 307                         break;
 308                 }
 309
 310                 str.push_back(c);
 311         }
 312
 313         docstring s(&str[0], str.size());
 314
 315         if (s[0] == '\t')
 316                 s.replace(0,1,from_ascii("    "));
 317
 318         if (!selection && !change_running.changed()) {
 319                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 320                 return;
 321         }
 322
 323         FontInfo copy = font;
 324         if (change_running.changed())
 325                 copy.setPaintColor(change_running.color());
 326         else if (selection)
 327                 copy.setPaintColor(Color_selectiontext);
 328
 329         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 330 }
 331
 332
 333 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 334                 int desc)
 335 {
 336         if (!lyxrc.mark_foreign_language)
 337                 return;
 338         if (lang == latex_language)
 339                 return;
 340         if (lang == pi_.base.bv->buffer().params().language)
 341                 return;
 342
 343         int const y = yo_ + 1 + desc;
 344         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 345 }
 346
 347
 348 void RowPainter::paintMisspelledMark(double orig_x, int desc)
 349 {
 350         int const y = yo_ + desc;
 351         pi_.pain.line(int(orig_x), y, int(x_), y, Color_red, Painter::line_onoffdash, 0.5);
 352 }
 353
 354
 355 void RowPainter::paintFromPos(pos_type & vpos)
 356 {
 357         pos_type const pos = bidi_.vis2log(vpos);
 358         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 359         double const orig_x = x_;
 360
 361         // usual characters, no insets
 362         char_type const c = par_.getChar(pos);
 363
 364         // special case languages
 365         string const & lang = orig_font.language()->lang();
 366         bool const hebrew = lang == "hebrew";
 367         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 368                                                 lang == "farsi";
 369
 370         // spelling correct?
 371         bool const misspelled_ =
 372                 lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 373
 374         // draw as many chars as we can
 375         if ((!hebrew && !arabic)
 376                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 377                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 378                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 379         } else if (hebrew) {
 380                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 381         } else if (arabic) {
 382                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 383         }
 384
 385         paintForeignMark(orig_x, orig_font.language());
 386
 387         if (lyxrc.spellcheck_continuously && misspelled_) {
 388                 paintMisspelledMark(orig_x, 2);
 389         }
 390 }
 391
 392
 393 void RowPainter::paintChangeBar()
 394 {
 395         pos_type const start = row_.pos();
 396         pos_type end = row_.endpos();
 397
 398         if (par_.size() == end) {
 399                 // this is the last row of the paragraph;
 400                 // thus, we must also consider the imaginary end-of-par character
 401                 end++;
 402         }
 403
 404         if (start == end || !par_.isChanged(start, end))
 405                 return;
 406
 407         int const height = text_metrics_.isLastRow(pit_, row_)
 408                 ? row_.ascent()
 409                 : row_.height();
 410
 411         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 412 }
 413
 414
 415 void RowPainter::paintAppendix()
 416 {
 417         // only draw the appendix frame once (for the main text)
 418         if (!par_.params().appendix() || !text_.isMainText())
 419                 return;
 420
 421         int y = yo_ - row_.ascent();
 422
 423         if (par_.params().startOfAppendix())
 424                 y += 2 * defaultRowHeight();
 425
 426         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 427         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 428 }
 429
 430
 431 void RowPainter::paintDepthBar()
 432 {
 433         depth_type const depth = par_.getDepth();
 434
 435         if (depth <= 0)
 436                 return;
 437
 438         depth_type prev_depth = 0;
 439         if (!text_metrics_.isFirstRow(pit_, row_)) {
 440                 pit_type pit2 = pit_;
 441                 if (row_.pos() == 0)
 442                         --pit2;
 443                 prev_depth = pars_[pit2].getDepth();
 444         }
 445
 446         depth_type next_depth = 0;
 447         if (!text_metrics_.isLastRow(pit_, row_)) {
 448                 pit_type pit2 = pit_;
 449                 if (row_.endpos() >= pars_[pit2].size())
 450                         ++pit2;
 451                 next_depth = pars_[pit2].getDepth();
 452         }
 453
 454         for (depth_type i = 1; i <= depth; ++i) {
 455                 int const w = nestMargin() / 5;
 456                 int x = int(xo_) + w * i;
 457                 // only consider the changebar space if we're drawing outermost text
 458                 if (text_.isMainText())
 459                         x += changebarMargin();
 460
 461                 int const starty = yo_ - row_.ascent();
 462                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 463
 464                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 465
 466                 if (i > prev_depth)
 467                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 468                 if (i > next_depth)
 469                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 470         }
 471 }
 472
 473
 474 int RowPainter::paintAppendixStart(int y)
 475 {
 476         FontInfo pb_font = sane_font;
 477         pb_font.setColor(Color_appendix);
 478         pb_font.decSize();
 479
 480         int w = 0;
 481         int a = 0;
 482         int d = 0;
 483
 484         docstring const label = _("Appendix");
 485         theFontMetrics(pb_font).rectText(label, w, a, d);
 486
 487         int const text_start = int(xo_ + (width_ - w) / 2);
 488         int const text_end = text_start + w;
 489
 490         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 491
 492         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 493         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 494
 495         return 3 * defaultRowHeight();
 496 }
 497
 498
 499 void RowPainter::paintFirst()
 500 {
 501         ParagraphParameters const & pparams = par_.params();
 502         Buffer const & buffer = pi_.base.bv->buffer();
 503         BufferParams const & bparams = buffer.params();
 504         Layout const & layout = par_.layout();
 505
 506         int y_top = 0;
 507
 508         // start of appendix?
 509         if (pparams.startOfAppendix())
 510                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 511
 512         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 513                 && pit_ != 0) {
 514                 if (layout.latextype == LATEX_PARAGRAPH
 515                     && !par_.getDepth()) {
 516                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 517                 } else {
 518                         Layout const & playout = pars_[pit_ - 1].layout();
 519                         if (playout.latextype == LATEX_PARAGRAPH
 520                             && !pars_[pit_ - 1].getDepth()) {
 521                                 // is it right to use defskip here, too? (AS)
 522                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 523                         }
 524                 }
 525         }
 526
 527         bool const is_rtl = text_.isRTL(par_);
 528         bool const is_seq = text_.isFirstInSequence(pit_);
 529         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 530
 531         // should we print a label?
 532         if (layout.labeltype >= LABEL_STATIC
 533             && (layout.labeltype != LABEL_STATIC
 534                       || layout.latextype != LATEX_ENVIRONMENT
 535                       || is_seq)) {
 536
 537                 FontInfo const font = labelFont();
 538                 FontMetrics const & fm = theFontMetrics(font);
 539
 540                 docstring const str = par_.labelString();
 541                 if (!str.empty()) {
 542                         double x = x_;
 543
 544                         // this is special code for the chapter layout. This is
 545                         // printed in an extra row and has a pagebreak at
 546                         // the top.
 547                         if (layout.counter == "chapter") {
 548                                 double spacing_val = 1.0;
 549                                 if (!pparams.spacing().isDefault()) {
 550                                         spacing_val = pparams.spacing().getValue();
 551                                 } else {
 552                                         spacing_val = bparams.spacing().getValue();
 553                                 }
 554
 555                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 556
 557                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 558                                         + int(layout.parsep) * defaultRowHeight();
 559
 560                                 if (is_rtl) {
 561                                         x = width_ - leftMargin() -
 562                                                 fm.width(str);
 563                                 }
 564
 565                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 566                         } else {
 567                                 if (is_rtl) {
 568                                         x = width_ - leftMargin()
 569                                                 + fm.width(layout.labelsep);
 570                                 } else {
 571                                         x = x_ - fm.width(layout.labelsep)
 572                                                 - fm.width(str);
 573                                 }
 574
 575                                 pi_.pain.text(int(x), yo_, str, font);
 576                         }
 577                 }
 578
 579         // the labels at the top of an environment.
 580         // More or less for bibliography
 581         } else if (is_seq &&
 582                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 583                 layout.labeltype == LABEL_BIBLIO ||
 584                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 585                 FontInfo const font = labelFont();
 586                 docstring const str = par_.labelString();
 587                 if (!str.empty()) {
 588                         double spacing_val = 1.0;
 589                         if (!pparams.spacing().isDefault())
 590                                 spacing_val = pparams.spacing().getValue();
 591                         else
 592                                 spacing_val = bparams.spacing().getValue();
 593
 594                         FontMetrics const & fm = theFontMetrics(font);
 595
 596                         int const labeladdon = int(fm.maxHeight()
 597                                 * layout.spacing.getValue() * spacing_val);
 598
 599                         int maxdesc =
 600                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 601                                 + (layout.labelbottomsep * defaultRowHeight()));
 602
 603                         double x = x_;
 604                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 605                                 if (is_rtl)
 606                                         x = leftMargin();
 607                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 608                                 x -= fm.width(str) / 2;
 609                         } else if (is_rtl) {
 610                                 x = width_ - leftMargin() -     fm.width(str);
 611                         }
 612                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 613                 }
 614         }
 615 }
 616
 617
 618 /** Check if the current paragraph is the last paragraph in a
 619     proof environment */
 620 static int getEndLabel(pit_type p, Text const & text)
 621 {
 622         ParagraphList const & pars = text.paragraphs();
 623         pit_type pit = p;
 624         depth_type par_depth = pars[p].getDepth();
 625         while (pit != pit_type(pars.size())) {
 626                 Layout const & layout = pars[pit].layout();
 627                 int const endlabeltype = layout.endlabeltype;
 628
 629                 if (endlabeltype != END_LABEL_NO_LABEL) {
 630                         if (p + 1 == pit_type(pars.size()))
 631                                 return endlabeltype;
 632
 633                         depth_type const next_depth =
 634                                 pars[p + 1].getDepth();
 635                         if (par_depth > next_depth ||
 636                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 637                                 return endlabeltype;
 638                         break;
 639                 }
 640                 if (par_depth == 0)
 641                         break;
 642                 pit = text.outerHook(pit);
 643                 if (pit != pit_type(pars.size()))
 644                         par_depth = pars[pit].getDepth();
 645         }
 646         return END_LABEL_NO_LABEL;
 647 }
 648
 649
 650 void RowPainter::paintLast()
 651 {
 652         bool const is_rtl = text_.isRTL(par_);
 653         int const endlabel = getEndLabel(pit_, text_);
 654
 655         // paint imaginary end-of-paragraph character
 656
 657         Change const & change = par_.lookupChange(par_.size());
 658         if (change.changed()) {
 659                 FontMetrics const & fm =
 660                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 661                 int const length = fm.maxAscent() / 2;
 662                 Color col = change.color();
 663
 664                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 665                            Painter::line_solid, 3);
 666
 667                 if (change.deleted()) {
 668                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 669                                 yo_ + 2, col, Painter::line_solid, 3);
 670                 } else {
 671                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 672                                 yo_ + 2, col, Painter::line_solid, 3);
 673                 }
 674         }
 675
 676         // draw an endlabel
 677
 678         switch (endlabel) {
 679         case END_LABEL_BOX:
 680         case END_LABEL_FILLED_BOX: {
 681                 FontInfo const font = labelFont();
 682                 FontMetrics const & fm = theFontMetrics(font);
 683                 int const size = int(0.75 * fm.maxAscent());
 684                 int const y = yo_ - size;
 685                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 686                 int x = is_rtl ? nestMargin() + changebarMargin()
 687                         : max_row_width - text_metrics_.rightMargin(pm_);
 688
 689                 // If needed, move the box a bit to avoid overlapping with text.
 690                 int const rem = max_row_width - row_.width();
 691                 if (rem <= 0)
 692                         x += is_rtl ? rem : - rem;
 693
 694                 if (endlabel == END_LABEL_BOX)
 695                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 696                 else
 697                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 698                 break;
 699         }
 700
 701         case END_LABEL_STATIC: {
 702                 FontInfo const font = labelFont();
 703                 FontMetrics const & fm = theFontMetrics(font);
 704                 docstring const & str = par_.layout().endlabelstring();
 705                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 706                 pi_.pain.text(int(x), yo_, str, font);
 707                 break;
 708         }
 709
 710         case END_LABEL_NO_LABEL:
 711                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 712                         docstring const s = docstring(1, char_type(0x00B6));
 713                         FontInfo f = FontInfo();
 714                         FontMetrics const & fm = theFontMetrics(f);
 715                         f.setColor(Color_paragraphmarker);
 716                         pi_.pain.text(int(x_), yo_, s, f);
 717                         x_ += fm.width(s);
 718                 }
 719                 break;
 720         }
 721 }
 722
 723
 724 void RowPainter::paintOnlyInsets()
 725 {
 726         CoordCache const & cache = pi_.base.bv->coordCache();
 727         pos_type const end = row_.endpos();
 728         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 729                 // If outer row has changed, nested insets are repaint completely.
 730                 Inset const * inset = par_.getInset(pos);
 731                 if (!inset)
 732                         continue;
 733                 if (x_ > pi_.base.bv->workWidth()
 734                     || !cache.getInsets().has(inset))
 735                         continue;
 736                 x_ = cache.getInsets().x(inset);
 737
 738                 bool const pi_selected = pi_.selected;
 739                 Cursor const & cur = pi_.base.bv->cursor();
 740                 if (cur.selection() && cur.text() == &text_
 741                           && cur.normalAnchor().text() == &text_)
 742                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 743                 paintInset(inset, pos);
 744                 pi_.selected = pi_selected;
 745         }
 746 }
 747
 748
 749 void RowPainter::paintText()
 750 {
 751         pos_type const end = row_.endpos();
 752         // Spaces at logical line breaks in bidi text must be skipped during
 753         // painting. However, they may appear visually in the middle
 754         // of a row; they must be skipped, wherever they are...
 755         // * logically "abc_[HEBREW_\nHEBREW]"
 756         // * visually "abc_[_WERBEH\nWERBEH]"
 757         pos_type skipped_sep_vpos = -1;
 758         pos_type body_pos = par_.beginOfBody();
 759         if (body_pos > 0 &&
 760                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 761                 body_pos = 0;
 762         }
 763
 764         Layout const & layout = par_.layout();
 765
 766         Change change_running;
 767         int change_last_x = 0;
 768
 769         // check for possible inline completion
 770         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 771         pos_type inlineCompletionVPos = -1;
 772         if (inlineCompletionPos.inTexted()
 773             && inlineCompletionPos.text() == &text_
 774             && inlineCompletionPos.pit() == pit_
 775             && inlineCompletionPos.pos() - 1 >= row_.pos()
 776             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 777                 // draw logically behind the previous character
 778                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 779         }
 780
 781         // Use font span to speed things up, see below
 782         FontSpan font_span;
 783         Font font;
 784
 785         // If the last logical character is a separator, don't paint it, unless
 786         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 787         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 788                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 789
 790         for (pos_type vpos = row_.pos(); vpos < end; ) {
 791                 if (x_ > pi_.base.bv->workWidth())
 792                         break;
 793
 794                 // Skip the separator at the logical end of the row
 795                 if (vpos == skipped_sep_vpos) {
 796                         ++vpos;
 797                         continue;
 798                 }
 799
 800                 pos_type const pos = bidi_.vis2log(vpos);
 801
 802                 if (pos >= par_.size()) {
 803                         ++vpos;
 804                         continue;
 805                 }
 806
 807                 // Use font span to speed things up, see above
 808                 if (vpos < font_span.first || vpos > font_span.last) {
 809                         font_span = par_.fontSpan(vpos);
 810                         font = text_metrics_.displayFont(pit_, vpos);
 811
 812                         // split font span if inline completion is inside
 813                         if (font_span.first <= inlineCompletionVPos
 814                             && font_span.last > inlineCompletionVPos)
 815                                 font_span.last = inlineCompletionVPos;
 816                 }
 817
 818                 const int width_pos = pm_.singleWidth(pos, font);
 819
 820                 if (x_ + width_pos < 0) {
 821                         x_ += width_pos;
 822                         ++vpos;
 823                         continue;
 824                 }
 825                 Change const & change = par_.lookupChange(pos);
 826                 if (change.changed() && !change_running.changed()) {
 827                         change_running = change;
 828                         change_last_x = int(x_);
 829                 }
 830
 831                 Inset const * inset = par_.getInset(pos);
 832                 bool const highly_editable_inset = inset
 833                         && inset->editable();
 834
 835                 // If we reach the end of a change or if the author changes, paint it.
 836                 // We also don't paint across things like tables
 837                 if (change_running.changed() && (highly_editable_inset
 838                         || !change.changed() || !change_running.isSimilarTo(change))) {
 839                         // Calculate 1/3 height of the buffer's default font
 840                         FontMetrics const & fm
 841                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 842                         int const y_bar = change_running.deleted() ?
 843                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 844                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 845                                 change_running.color(), Painter::line_solid, 0.5);
 846
 847                         // Change might continue with a different author or type
 848                         if (change.changed() && !highly_editable_inset) {
 849                                 change_running = change;
 850                                 change_last_x = int(x_);
 851                         } else
 852                                 change_running.setUnchanged();
 853                 }
 854
 855                 if (body_pos > 0 && pos == body_pos - 1) {
 856                         int const lwidth = theFontMetrics(labelFont())
 857                                 .width(layout.labelsep);
 858
 859                         x_ += row_.label_hfill + lwidth - width_pos;
 860                 }
 861
 862                 // Is the inline completion in front of character?
 863                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 864                         paintInlineCompletion(font);
 865
 866                 if (par_.isSeparator(pos)) {
 867                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 868                         double const orig_x = x_;
 869                         x_ += width_pos;
 870                         if (pos >= body_pos)
 871                                 x_ += row_.separator;
 872                         paintForeignMark(orig_x, orig_font.language());
 873                         ++vpos;
 874
 875                 } else if (inset) {
 876                         // If outer row has changed, nested insets are repaint completely.
 877                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 878
 879                         bool const pi_selected = pi_.selected;
 880                         Cursor const & cur = pi_.base.bv->cursor();
 881                         if (cur.selection() && cur.text() == &text_
 882                                   && cur.normalAnchor().text() == &text_)
 883                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 884                         paintInset(inset, pos);
 885                         pi_.selected = pi_selected;
 886                         ++vpos;
 887
 888                 } else {
 889                         // paint as many characters as possible.
 890                         paintFromPos(vpos);
 891                 }
 892
 893                 // Is the inline completion after character?
 894                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 895                         paintInlineCompletion(font);
 896         }
 897
 898         // if we reach the end of a struck out range, paint it
 899         if (change_running.changed()) {
 900                 FontMetrics const & fm
 901                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 902                 int const y_bar = change_running.deleted() ?
 903                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 904                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 905                         change_running.color(), Painter::line_solid, 0.5);
 906                 change_running.setUnchanged();
 907         }
 908 }
 909
 910
 911 void RowPainter::paintInlineCompletion(Font const & font)
 912 {
 913         docstring completion = pi_.base.bv->inlineCompletion();
 914         FontInfo f = font.fontInfo();
 915         bool rtl = font.isRightToLeft();
 916
 917         // draw the unique and the non-unique completion part
 918         // Note: this is not time-critical as it is
 919         // only done once per screen.
 920         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 921         docstring s1 = completion.substr(0, uniqueTo);
 922         docstring s2 = completion.substr(uniqueTo);
 923         ColorCode c1 = Color_inlinecompletion;
 924         ColorCode c2 = Color_nonunique_inlinecompletion;
 925
 926         // right to left?
 927         if (rtl) {
 928                 swap(s1, s2);
 929                 swap(c1, c2);
 930         }
 931
 932         if (s1.size() > 0) {
 933                 f.setColor(c1);
 934                 pi_.pain.text(int(x_), yo_, s1, f);
 935                 x_ += theFontMetrics(font).width(s1);
 936         }
 937
 938         if (s2.size() > 0) {
 939                 f.setColor(c2);
 940                 pi_.pain.text(int(x_), yo_, s2, f);
 941                 x_ += theFontMetrics(font).width(s2);
 942         }
 943 }
 944
 945 } // namespace lyx