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         char_type prev_char = ' ';
 238         // collect as much similar chars as we can
 239         for (++vpos ; vpos < end ; ++vpos) {
 240                 pos = bidi_.vis2log(vpos);
 241                 if (pos < font_span.first || pos > font_span.last)
 242                         break;
 243
 244                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 245                 if (new_selection != selection)
 246                         // Selection ends or starts here.
 247                         break;
 248
 249                 Change const & change = par_.lookupChange(pos);
 250                 if (!change_running.isSimilarTo(change))
 251                         // Track change type or author has changed.
 252                         break;
 253
 254                 char_type c = par_.getChar(pos);
 255
 256                 if (c == '\t' || prev_char == '\t') {
 257                         prev_char = c;
 258                         break;
 259                 }
 260
 261                 if (!isPrintableNonspace(c))
 262                         break;
 263
 264                 /* Because we do our own bidi, at this point the strings are
 265                  * already in visual order. However, Qt also applies its own
 266                  * bidi algorithm to strings that it paints to the screen.
 267                  * Therefore, if we were to paint Hebrew/Arabic words as a
 268                  * single string, the letters in the words would get reversed
 269                  * again. In order to avoid that, we don't collect Hebrew/
 270                  * Arabic characters, but rather paint them one at a time.
 271                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 272                  */
 273                 if (hebrew)
 274                         break;
 275
 276                 /* FIXME: these checks are irrelevant, since 'arabic' and
 277                  * 'hebrew' alone are already going to trigger a break.
 278                  * However, this should not be removed completely, because
 279                  * if an alternative solution is found which allows grouping
 280                  * of arabic and hebrew characters, then these breaks may have
 281                  * to be re-applied.
 282
 283                 if (arabic && Encodings::isArabicComposeChar(c))
 284                         break;
 285
 286                 if (hebrew && Encodings::isHebrewComposeChar(c))
 287                         break;
 288                 */
 289
 290                 if (arabic) {
 291                         if (c == '(')
 292                                 c = ')';
 293                         else if (c == ')')
 294                                 c = '(';
 295                         c = par_.transformChar(c, pos);
 296                         /* see comment in hebrew, explaining why we break */
 297                         break;
 298                 }
 299
 300                 str.push_back(c);
 301         }
 302
 303         docstring s(&str[0], str.size());
 304
 305         if (s[0] == '\t')
 306                 s.replace(0,1,from_ascii("    "));
 307
 308         if (!selection && !change_running.changed()) {
 309                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 310                 return;
 311         }
 312
 313         FontInfo copy = font;
 314         if (change_running.changed())
 315                 copy.setPaintColor(change_running.color());
 316         else if (selection)
 317                 copy.setPaintColor(Color_selectiontext);
 318
 319         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 320 }
 321
 322
 323 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 324                 int desc)
 325 {
 326         if (!lyxrc.mark_foreign_language)
 327                 return;
 328         if (lang == latex_language)
 329                 return;
 330         if (lang == pi_.base.bv->buffer().params().language)
 331                 return;
 332
 333         int const y = yo_ + 1 + desc;
 334         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 335 }
 336
 337
 338 void RowPainter::paintMisspelledMark(double orig_x, int desc)
 339 {
 340         int const y = yo_ + desc;
 341         pi_.pain.line(int(orig_x), y, int(x_), y, Color_red, Painter::line_onoffdash, 0.5);
 342 }
 343
 344
 345 void RowPainter::paintFromPos(pos_type & vpos)
 346 {
 347         pos_type const pos = bidi_.vis2log(vpos);
 348         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 349         double const orig_x = x_;
 350
 351         // usual characters, no insets
 352         char_type const c = par_.getChar(pos);
 353
 354         // special case languages
 355         string const & lang = orig_font.language()->lang();
 356         bool const hebrew = lang == "hebrew";
 357         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 358                                                 lang == "farsi";
 359
 360         // draw as many chars as we can
 361         if ((!hebrew && !arabic)
 362                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 363                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 364                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 365         } else if (hebrew) {
 366                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 367         } else if (arabic) {
 368                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 369         }
 370
 371         paintForeignMark(orig_x, orig_font.language());
 372
 373         if (lyxrc.spellcheck_continuously && orig_font.isMisspelled())
 374                 paintMisspelledMark(orig_x, 2);
 375 }
 376
 377
 378 void RowPainter::paintChangeBar()
 379 {
 380         pos_type const start = row_.pos();
 381         pos_type end = row_.endpos();
 382
 383         if (par_.size() == end) {
 384                 // this is the last row of the paragraph;
 385                 // thus, we must also consider the imaginary end-of-par character
 386                 end++;
 387         }
 388
 389         if (start == end || !par_.isChanged(start, end))
 390                 return;
 391
 392         int const height = text_metrics_.isLastRow(pit_, row_)
 393                 ? row_.ascent()
 394                 : row_.height();
 395
 396         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 397 }
 398
 399
 400 void RowPainter::paintAppendix()
 401 {
 402         // only draw the appendix frame once (for the main text)
 403         if (!par_.params().appendix() || !text_.isMainText())
 404                 return;
 405
 406         int y = yo_ - row_.ascent();
 407
 408         if (par_.params().startOfAppendix())
 409                 y += 2 * defaultRowHeight();
 410
 411         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 412         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 413 }
 414
 415
 416 void RowPainter::paintDepthBar()
 417 {
 418         depth_type const depth = par_.getDepth();
 419
 420         if (depth <= 0)
 421                 return;
 422
 423         depth_type prev_depth = 0;
 424         if (!text_metrics_.isFirstRow(pit_, row_)) {
 425                 pit_type pit2 = pit_;
 426                 if (row_.pos() == 0)
 427                         --pit2;
 428                 prev_depth = pars_[pit2].getDepth();
 429         }
 430
 431         depth_type next_depth = 0;
 432         if (!text_metrics_.isLastRow(pit_, row_)) {
 433                 pit_type pit2 = pit_;
 434                 if (row_.endpos() >= pars_[pit2].size())
 435                         ++pit2;
 436                 next_depth = pars_[pit2].getDepth();
 437         }
 438
 439         for (depth_type i = 1; i <= depth; ++i) {
 440                 int const w = nestMargin() / 5;
 441                 int x = int(xo_) + w * i;
 442                 // only consider the changebar space if we're drawing outermost text
 443                 if (text_.isMainText())
 444                         x += changebarMargin();
 445
 446                 int const starty = yo_ - row_.ascent();
 447                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 448
 449                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 450
 451                 if (i > prev_depth)
 452                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 453                 if (i > next_depth)
 454                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 455         }
 456 }
 457
 458
 459 int RowPainter::paintAppendixStart(int y)
 460 {
 461         FontInfo pb_font = sane_font;
 462         pb_font.setColor(Color_appendix);
 463         pb_font.decSize();
 464
 465         int w = 0;
 466         int a = 0;
 467         int d = 0;
 468
 469         docstring const label = _("Appendix");
 470         theFontMetrics(pb_font).rectText(label, w, a, d);
 471
 472         int const text_start = int(xo_ + (width_ - w) / 2);
 473         int const text_end = text_start + w;
 474
 475         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 476
 477         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 478         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 479
 480         return 3 * defaultRowHeight();
 481 }
 482
 483
 484 void RowPainter::paintFirst()
 485 {
 486         ParagraphParameters const & pparams = par_.params();
 487         Buffer const & buffer = pi_.base.bv->buffer();
 488         BufferParams const & bparams = buffer.params();
 489         Layout const & layout = par_.layout();
 490
 491         int y_top = 0;
 492
 493         // start of appendix?
 494         if (pparams.startOfAppendix())
 495                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 496
 497         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 498                 && pit_ != 0) {
 499                 if (layout.latextype == LATEX_PARAGRAPH
 500                     && !par_.getDepth()) {
 501                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 502                 } else {
 503                         Layout const & playout = pars_[pit_ - 1].layout();
 504                         if (playout.latextype == LATEX_PARAGRAPH
 505                             && !pars_[pit_ - 1].getDepth()) {
 506                                 // is it right to use defskip here, too? (AS)
 507                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 508                         }
 509                 }
 510         }
 511
 512         bool const is_rtl = text_.isRTL(par_);
 513         bool const is_seq = text_.isFirstInSequence(pit_);
 514         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 515
 516         // should we print a label?
 517         if (layout.labeltype >= LABEL_STATIC
 518             && (layout.labeltype != LABEL_STATIC
 519                       || layout.latextype != LATEX_ENVIRONMENT
 520                       || is_seq)) {
 521
 522                 FontInfo const font = labelFont();
 523                 FontMetrics const & fm = theFontMetrics(font);
 524
 525                 docstring const str = par_.labelString();
 526                 if (!str.empty()) {
 527                         double x = x_;
 528
 529                         // this is special code for the chapter layout. This is
 530                         // printed in an extra row and has a pagebreak at
 531                         // the top.
 532                         if (layout.counter == "chapter") {
 533                                 double spacing_val = 1.0;
 534                                 if (!pparams.spacing().isDefault()) {
 535                                         spacing_val = pparams.spacing().getValue();
 536                                 } else {
 537                                         spacing_val = bparams.spacing().getValue();
 538                                 }
 539
 540                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 541
 542                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 543                                         + int(layout.parsep) * defaultRowHeight();
 544
 545                                 if (is_rtl) {
 546                                         x = width_ - leftMargin() -
 547                                                 fm.width(str);
 548                                 }
 549
 550                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 551                         } else {
 552                                 if (is_rtl) {
 553                                         x = width_ - leftMargin()
 554                                                 + fm.width(layout.labelsep);
 555                                 } else {
 556                                         x = x_ - fm.width(layout.labelsep)
 557                                                 - fm.width(str);
 558                                 }
 559
 560                                 pi_.pain.text(int(x), yo_, str, font);
 561                         }
 562                 }
 563
 564         // the labels at the top of an environment.
 565         // More or less for bibliography
 566         } else if (is_seq &&
 567                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 568                 layout.labeltype == LABEL_BIBLIO ||
 569                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 570                 FontInfo const font = labelFont();
 571                 docstring const str = par_.labelString();
 572                 if (!str.empty()) {
 573                         double spacing_val = 1.0;
 574                         if (!pparams.spacing().isDefault())
 575                                 spacing_val = pparams.spacing().getValue();
 576                         else
 577                                 spacing_val = bparams.spacing().getValue();
 578
 579                         FontMetrics const & fm = theFontMetrics(font);
 580
 581                         int const labeladdon = int(fm.maxHeight()
 582                                 * layout.spacing.getValue() * spacing_val);
 583
 584                         int maxdesc =
 585                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 586                                 + (layout.labelbottomsep * defaultRowHeight()));
 587
 588                         double x = x_;
 589                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 590                                 if (is_rtl)
 591                                         x = leftMargin();
 592                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 593                                 x -= fm.width(str) / 2;
 594                         } else if (is_rtl) {
 595                                 x = width_ - leftMargin() -     fm.width(str);
 596                         }
 597                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 598                 }
 599         }
 600 }
 601
 602
 603 /** Check if the current paragraph is the last paragraph in a
 604     proof environment */
 605 static int getEndLabel(pit_type p, Text const & text)
 606 {
 607         ParagraphList const & pars = text.paragraphs();
 608         pit_type pit = p;
 609         depth_type par_depth = pars[p].getDepth();
 610         while (pit != pit_type(pars.size())) {
 611                 Layout const & layout = pars[pit].layout();
 612                 int const endlabeltype = layout.endlabeltype;
 613
 614                 if (endlabeltype != END_LABEL_NO_LABEL) {
 615                         if (p + 1 == pit_type(pars.size()))
 616                                 return endlabeltype;
 617
 618                         depth_type const next_depth =
 619                                 pars[p + 1].getDepth();
 620                         if (par_depth > next_depth ||
 621                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 622                                 return endlabeltype;
 623                         break;
 624                 }
 625                 if (par_depth == 0)
 626                         break;
 627                 pit = text.outerHook(pit);
 628                 if (pit != pit_type(pars.size()))
 629                         par_depth = pars[pit].getDepth();
 630         }
 631         return END_LABEL_NO_LABEL;
 632 }
 633
 634
 635 void RowPainter::paintLast()
 636 {
 637         bool const is_rtl = text_.isRTL(par_);
 638         int const endlabel = getEndLabel(pit_, text_);
 639
 640         // paint imaginary end-of-paragraph character
 641
 642         Change const & change = par_.lookupChange(par_.size());
 643         if (change.changed()) {
 644                 FontMetrics const & fm =
 645                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 646                 int const length = fm.maxAscent() / 2;
 647                 Color col = change.color();
 648
 649                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 650                            Painter::line_solid, 3);
 651
 652                 if (change.deleted()) {
 653                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 654                                 yo_ + 2, col, Painter::line_solid, 3);
 655                 } else {
 656                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 657                                 yo_ + 2, col, Painter::line_solid, 3);
 658                 }
 659         }
 660
 661         // draw an endlabel
 662
 663         switch (endlabel) {
 664         case END_LABEL_BOX:
 665         case END_LABEL_FILLED_BOX: {
 666                 FontInfo const font = labelFont();
 667                 FontMetrics const & fm = theFontMetrics(font);
 668                 int const size = int(0.75 * fm.maxAscent());
 669                 int const y = yo_ - size;
 670                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 671                 int x = is_rtl ? nestMargin() + changebarMargin()
 672                         : max_row_width - text_metrics_.rightMargin(pm_);
 673
 674                 // If needed, move the box a bit to avoid overlapping with text.
 675                 int const rem = max_row_width - row_.width();
 676                 if (rem <= 0)
 677                         x += is_rtl ? rem : - rem;
 678
 679                 if (endlabel == END_LABEL_BOX)
 680                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 681                 else
 682                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 683                 break;
 684         }
 685
 686         case END_LABEL_STATIC: {
 687                 FontInfo const font = labelFont();
 688                 FontMetrics const & fm = theFontMetrics(font);
 689                 docstring const & str = par_.layout().endlabelstring();
 690                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 691                 pi_.pain.text(int(x), yo_, str, font);
 692                 break;
 693         }
 694
 695         case END_LABEL_NO_LABEL:
 696                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 697                         docstring const s = docstring(1, char_type(0x00B6));
 698                         FontInfo f = FontInfo();
 699                         FontMetrics const & fm = theFontMetrics(f);
 700                         f.setColor(Color_paragraphmarker);
 701                         pi_.pain.text(int(x_), yo_, s, f);
 702                         x_ += fm.width(s);
 703                 }
 704                 break;
 705         }
 706 }
 707
 708
 709 void RowPainter::paintOnlyInsets()
 710 {
 711         CoordCache const & cache = pi_.base.bv->coordCache();
 712         pos_type const end = row_.endpos();
 713         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 714                 // If outer row has changed, nested insets are repaint completely.
 715                 Inset const * inset = par_.getInset(pos);
 716                 if (!inset)
 717                         continue;
 718                 if (x_ > pi_.base.bv->workWidth()
 719                     || !cache.getInsets().has(inset))
 720                         continue;
 721                 x_ = cache.getInsets().x(inset);
 722
 723                 bool const pi_selected = pi_.selected;
 724                 Cursor const & cur = pi_.base.bv->cursor();
 725                 if (cur.selection() && cur.text() == &text_
 726                           && cur.normalAnchor().text() == &text_)
 727                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 728                 paintInset(inset, pos);
 729                 pi_.selected = pi_selected;
 730         }
 731 }
 732
 733
 734 void RowPainter::paintText()
 735 {
 736         pos_type const end = row_.endpos();
 737         // Spaces at logical line breaks in bidi text must be skipped during
 738         // painting. However, they may appear visually in the middle
 739         // of a row; they must be skipped, wherever they are...
 740         // * logically "abc_[HEBREW_\nHEBREW]"
 741         // * visually "abc_[_WERBEH\nWERBEH]"
 742         pos_type skipped_sep_vpos = -1;
 743         pos_type body_pos = par_.beginOfBody();
 744         if (body_pos > 0 &&
 745                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 746                 body_pos = 0;
 747         }
 748
 749         Layout const & layout = par_.layout();
 750
 751         Change change_running;
 752         int change_last_x = 0;
 753
 754         // check for possible inline completion
 755         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 756         pos_type inlineCompletionVPos = -1;
 757         if (inlineCompletionPos.inTexted()
 758             && inlineCompletionPos.text() == &text_
 759             && inlineCompletionPos.pit() == pit_
 760             && inlineCompletionPos.pos() - 1 >= row_.pos()
 761             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 762                 // draw logically behind the previous character
 763                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 764         }
 765
 766         // Use font span to speed things up, see below
 767         FontSpan font_span;
 768         Font font;
 769
 770         // If the last logical character is a separator, don't paint it, unless
 771         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 772         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 773                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 774
 775         for (pos_type vpos = row_.pos(); vpos < end; ) {
 776                 if (x_ > pi_.base.bv->workWidth())
 777                         break;
 778
 779                 // Skip the separator at the logical end of the row
 780                 if (vpos == skipped_sep_vpos) {
 781                         ++vpos;
 782                         continue;
 783                 }
 784
 785                 pos_type const pos = bidi_.vis2log(vpos);
 786
 787                 if (pos >= par_.size()) {
 788                         ++vpos;
 789                         continue;
 790                 }
 791
 792                 // Use font span to speed things up, see above
 793                 if (vpos < font_span.first || vpos > font_span.last) {
 794                         font_span = par_.fontSpan(vpos);
 795                         font = text_metrics_.displayFont(pit_, vpos);
 796
 797                         // split font span if inline completion is inside
 798                         if (font_span.first <= inlineCompletionVPos
 799                             && font_span.last > inlineCompletionVPos)
 800                                 font_span.last = inlineCompletionVPos;
 801                 }
 802
 803                 const int width_pos = pm_.singleWidth(pos, font);
 804
 805                 if (x_ + width_pos < 0) {
 806                         x_ += width_pos;
 807                         ++vpos;
 808                         continue;
 809                 }
 810                 Change const & change = par_.lookupChange(pos);
 811                 if (change.changed() && !change_running.changed()) {
 812                         change_running = change;
 813                         change_last_x = int(x_);
 814                 }
 815
 816                 Inset const * inset = par_.getInset(pos);
 817                 bool const highly_editable_inset = inset
 818                         && inset->editable();
 819
 820                 // If we reach the end of a change or if the author changes, paint it.
 821                 // We also don't paint across things like tables
 822                 if (change_running.changed() && (highly_editable_inset
 823                         || !change.changed() || !change_running.isSimilarTo(change))) {
 824                         // Calculate 1/3 height of the buffer's default font
 825                         FontMetrics const & fm
 826                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 827                         int const y_bar = change_running.deleted() ?
 828                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 829                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 830                                 change_running.color(), Painter::line_solid, 0.5);
 831
 832                         // Change might continue with a different author or type
 833                         if (change.changed() && !highly_editable_inset) {
 834                                 change_running = change;
 835                                 change_last_x = int(x_);
 836                         } else
 837                                 change_running.setUnchanged();
 838                 }
 839
 840                 if (body_pos > 0 && pos == body_pos - 1) {
 841                         int const lwidth = theFontMetrics(labelFont())
 842                                 .width(layout.labelsep);
 843
 844                         x_ += row_.label_hfill + lwidth - width_pos;
 845                 }
 846
 847                 // Is the inline completion in front of character?
 848                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 849                         paintInlineCompletion(font);
 850
 851                 if (par_.isSeparator(pos)) {
 852                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 853                         double const orig_x = x_;
 854                         x_ += width_pos;
 855                         if (pos >= body_pos)
 856                                 x_ += row_.separator;
 857                         paintForeignMark(orig_x, orig_font.language());
 858                         ++vpos;
 859
 860                 } else if (inset) {
 861                         // If outer row has changed, nested insets are repaint completely.
 862                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 863
 864                         bool const pi_selected = pi_.selected;
 865                         Cursor const & cur = pi_.base.bv->cursor();
 866                         if (cur.selection() && cur.text() == &text_
 867                                   && cur.normalAnchor().text() == &text_)
 868                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 869                         paintInset(inset, pos);
 870                         pi_.selected = pi_selected;
 871                         ++vpos;
 872
 873                 } else {
 874                         // paint as many characters as possible.
 875                         paintFromPos(vpos);
 876                 }
 877
 878                 // Is the inline completion after character?
 879                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 880                         paintInlineCompletion(font);
 881         }
 882
 883         // if we reach the end of a struck out range, paint it
 884         if (change_running.changed()) {
 885                 FontMetrics const & fm
 886                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 887                 int const y_bar = change_running.deleted() ?
 888                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 889                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 890                         change_running.color(), Painter::line_solid, 0.5);
 891                 change_running.setUnchanged();
 892         }
 893 }
 894
 895
 896 void RowPainter::paintInlineCompletion(Font const & font)
 897 {
 898         docstring completion = pi_.base.bv->inlineCompletion();
 899         FontInfo f = font.fontInfo();
 900         bool rtl = font.isRightToLeft();
 901
 902         // draw the unique and the non-unique completion part
 903         // Note: this is not time-critical as it is
 904         // only done once per screen.
 905         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 906         docstring s1 = completion.substr(0, uniqueTo);
 907         docstring s2 = completion.substr(uniqueTo);
 908         ColorCode c1 = Color_inlinecompletion;
 909         ColorCode c2 = Color_nonunique_inlinecompletion;
 910
 911         // right to left?
 912         if (rtl) {
 913                 swap(s1, s2);
 914                 swap(c1, c2);
 915         }
 916
 917         if (s1.size() > 0) {
 918                 f.setColor(c1);
 919                 pi_.pain.text(int(x_), yo_, s1, f);
 920                 x_ += theFontMetrics(font).width(s1);
 921         }
 922
 923         if (s2.size() > 0) {
 924                 f.setColor(c2);
 925                 pi_.pain.text(int(x_), yo_, s2, f);
 926                 x_ += theFontMetrics(font).width(s2);
 927         }
 928 }
 929
 930 } // namespace lyx