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