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 "Buffer.h"
  18 #include "CoordCache.h"
  19 #include "Cursor.h"
  20 #include "BufferParams.h"
  21 #include "BufferView.h"
  22 #include "Changes.h"
  23 #include "Language.h"
  24 #include "Layout.h"
  25 #include "LyXRC.h"
  26 #include "Row.h"
  27 #include "MetricsInfo.h"
  28 #include "Paragraph.h"
  29 #include "ParagraphMetrics.h"
  30 #include "ParagraphParameters.h"
  31 #include "TextMetrics.h"
  32 #include "VSpace.h"
  33
  34 #include "frontends/FontMetrics.h"
  35 #include "frontends/Painter.h"
  36
  37 #include "insets/InsetText.h"
  38
  39 #include "mathed/InsetMath.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
  56 RowPainter::RowPainter(PainterInfo & pi,
  57         Text const & text, pit_type pit, Row const & row, int x, int y)
  58         : pi_(pi), text_(text),
  59           text_metrics_(pi_.base.bv->textMetrics(&text)),
  60           pars_(text.paragraphs()),
  61           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  62           pm_(text_metrics_.parMetrics(pit)), change_(pi_.change_),
  63           xo_(x), yo_(y), width_(text_metrics_.width()),
  64           solid_line_thickness_(1.0), solid_line_offset_(1),
  65           dotted_line_thickness_(1.0), dotted_line_offset_(2)
  66 {
  67         bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
  68
  69         if (lyxrc.zoom >= 200) {
  70                 // derive the line thickness from zoom factor
  71                 // the zoom is given in percent
  72                 // (increase thickness at 250%, 450% etc.)
  73                 solid_line_thickness_ = (float)(int((lyxrc.zoom + 50) / 200.0));
  74                 // adjust line_offset_ too
  75                 solid_line_offset_ = 1 + int(0.5 * solid_line_thickness_);
  76         }
  77         if (lyxrc.zoom >= 100) {
  78                 // derive the line thickness from zoom factor
  79                 // the zoom is given in percent
  80                 // (increase thickness at 150%, 250% etc.)
  81                 dotted_line_thickness_ = (float)(int((lyxrc.zoom + 50) / 100.0));
  82                 // adjust line_offset_ too
  83                 dotted_line_offset_ = int(0.5 * dotted_line_thickness_) + 1;
  84         }
  85
  86         x_ = row_.x + xo_;
  87
  88         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  89         //row_.dump();
  90
  91         LBUFERR(pit >= 0);
  92         LBUFERR(pit < int(text.paragraphs().size()));
  93 }
  94
  95
  96 FontInfo RowPainter::labelFont() const
  97 {
  98         FontInfo f = text_.labelFont(par_);
  99         // selected text?
 100         if (row_.begin_margin_sel || pi_.selected)
 101                 f.setPaintColor(Color_selectiontext);
 102         return f;
 103 }
 104
 105
 106 int RowPainter::leftMargin() const
 107 {
 108         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
 109                 row_.pos());
 110 }
 111
 112 // If you want to debug inset metrics uncomment the following line:
 113 //#define DEBUG_METRICS
 114 // This draws green lines around each inset.
 115
 116
 117 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
 118 {
 119         Font const font = text_metrics_.displayFont(pit_, pos);
 120
 121         LASSERT(inset, return);
 122         // Backup full_repaint status because some insets (InsetTabular)
 123         // requires a full repaint
 124         bool pi_full_repaint = pi_.full_repaint;
 125
 126         pi_.base.font = inset->inheritFont() ? font.fontInfo() :
 127                 pi_.base.bv->buffer().params().getFont().fontInfo();
 128         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 129         Change prev_change = change_;
 130         pi_.change_ = change_.changed() ? change_ : par_.lookupChange(pos);
 131
 132         int const x1 = int(x_);
 133         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 134         // insets are painted completely. Recursive
 135         // FIXME: it is wrong to completely paint the background
 136         // if we want to do single row painting.
 137         inset->drawBackground(pi_, x1, yo_);
 138         inset->drawSelection(pi_, x1, yo_);
 139         inset->draw(pi_, x1, yo_);
 140
 141         Dimension const & dim = pm_.insetDimension(inset);
 142
 143         paintForeignMark(x_, font.language(), dim.descent());
 144
 145         x_ += dim.width();
 146
 147         // Restore full_repaint status.
 148         pi_.full_repaint = pi_full_repaint;
 149         pi_.change_ = prev_change;
 150
 151 #ifdef DEBUG_METRICS
 152         int const x2 = x1 + dim.wid;
 153         int const y1 = yo_ + dim.des;
 154         int const y2 = yo_ - dim.asc;
 155         pi_.pain.line(x1, y1, x1, y2, Color_green);
 156         pi_.pain.line(x1, y1, x2, y1, Color_green);
 157         pi_.pain.line(x2, y1, x2, y2, Color_green);
 158         pi_.pain.line(x1, y2, x2, y2, Color_green);
 159 #endif
 160 }
 161
 162
 163 void RowPainter::paintChars(pos_type & vpos, Font const & font)
 164 {
 165         // This method takes up 70% of time when typing
 166         pos_type pos = bidi_.vis2log(vpos);
 167         // first character
 168         char_type c = par_.getChar(pos);
 169         docstring str;
 170         str.reserve(100);
 171
 172         // special case for arabic
 173         string const & lang = font.language()->lang();
 174         bool const swap_paren = lang == "arabic_arabtex"
 175                 || lang == "arabic_arabi"
 176                 || lang == "farsi";
 177
 178         // FIXME: Why only round brackets and why the difference to
 179         // Hebrew? See also Paragraph::getUChar
 180         if (swap_paren) {
 181                 if (c == '(')
 182                         c = ')';
 183                 else if (c == ')')
 184                         c = '(';
 185         }
 186         str.push_back(c);
 187
 188         pos_type const end = row_.endpos();
 189         FontSpan const font_span = par_.fontSpan(pos);
 190         // Track-change status.
 191         Change const & change_running = par_.lookupChange(pos);
 192
 193         // selected text?
 194         bool const selection = (pos >= row_.sel_beg && pos < row_.sel_end)
 195                 || pi_.selected;
 196
 197         // spelling correct?
 198         bool const spell_state =
 199                 lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 200
 201         // collect as much similar chars as we can
 202         for (++vpos ; vpos < end ; ++vpos) {
 203                 if (lyxrc.force_paint_single_char)
 204                         break;
 205
 206                 pos = bidi_.vis2log(vpos);
 207                 if (pos < font_span.first || pos > font_span.last)
 208                         break;
 209
 210                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 211                 if (new_selection != selection)
 212                         // Selection ends or starts here.
 213                         break;
 214
 215                 bool const new_spell_state =
 216                         lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 217                 if (new_spell_state != spell_state)
 218                         // Spell checker state changed here.
 219                         break;
 220
 221                 Change const & change = par_.lookupChange(pos);
 222                 if (!change_running.isSimilarTo(change))
 223                         // Track change type or author has changed.
 224                         break;
 225
 226                 char_type c = par_.getChar(pos);
 227
 228                 if (c == '\t')
 229                         break;
 230
 231                 if (!isPrintableNonspace(c)
 232                     && (c != ' ' || row_.separator > 0))
 233                         break;
 234
 235                 // FIXME: Why only round brackets and why the difference to
 236                 // Hebrew? See also Paragraph::getUChar
 237                 if (swap_paren) {
 238                         if (c == '(')
 239                                 c = ')';
 240                         else if (c == ')')
 241                                 c = '(';
 242                 }
 243
 244                 str.push_back(c);
 245         }
 246
 247         if (str[0] == '\t')
 248                 str.replace(0,1,from_ascii("    "));
 249
 250         /* Because we do our own bidi, at this point the strings are
 251          * already in visual order. However, Qt also applies its own
 252          * bidi algorithm to strings that it paints to the screen.
 253          * Therefore, if we were to paint Hebrew/Arabic words as a
 254          * single string, the letters in the words would get reversed
 255          * again. In order to avoid that, we force LTR drawing.
 256          * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 257          * for an earlier thread on the subject
 258          */
 259         // Left-to-right override: forces to draw text left-to-right
 260         char_type const LRO = 0x202D;
 261         // Right-to-left override: forces to draw text right-to-left
 262         char_type const RLO = 0x202E;
 263         // Pop directional formatting: return to previous state
 264         char_type const PDF = 0x202C;
 265         if (font.isVisibleRightToLeft()) {
 266                 reverse(str.begin(), str.end());
 267                 str = RLO + str + PDF;
 268         } else
 269                 str = LRO + str + PDF;
 270
 271         if (!selection && !change_running.changed()) {
 272                 x_ += pi_.pain.text(int(x_), yo_, str, font.fontInfo());
 273                 return;
 274         }
 275
 276         FontInfo copy = font.fontInfo();
 277         if (change_running.changed())
 278                 copy.setPaintColor(change_running.color());
 279         else if (selection)
 280                 copy.setPaintColor(Color_selectiontext);
 281
 282         x_ += pi_.pain.text(int(x_), yo_, str, copy);
 283 }
 284
 285
 286 void RowPainter::paintSeparator(double orig_x, double width,
 287         FontInfo const & font)
 288 {
 289         pi_.pain.textDecoration(font, int(orig_x), yo_, int(width));
 290         x_ += width;
 291 }
 292
 293
 294 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 295                 int desc)
 296 {
 297         if (!lyxrc.mark_foreign_language)
 298                 return;
 299         if (lang == latex_language)
 300                 return;
 301         if (lang == pi_.base.bv->buffer().params().language)
 302                 return;
 303
 304         int const y = yo_ + solid_line_offset_ + desc + int(solid_line_thickness_/2);
 305         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language,
 306                 Painter::line_solid, solid_line_thickness_);
 307 }
 308
 309
 310 void RowPainter::paintMisspelledMark(double orig_x, bool changed)
 311 {
 312         // if changed the misspelled marker gets placed slightly lower than normal
 313         // to avoid drawing at the same vertical offset
 314         float const y = yo_ + solid_line_offset_ + solid_line_thickness_
 315                 + (changed ? solid_line_thickness_ + 1 : 0)
 316                 + dotted_line_offset_;
 317         pi_.pain.line(int(orig_x), int(y), int(x_), int(y), Color_error,
 318                 Painter::line_onoffdash, dotted_line_thickness_);
 319 }
 320
 321
 322 void RowPainter::paintFromPos(pos_type & vpos, bool changed)
 323 {
 324         pos_type const pos = bidi_.vis2log(vpos);
 325         Font const font = text_metrics_.displayFont(pit_, pos);
 326         double const orig_x = x_;
 327
 328         paintChars(vpos, font);
 329         paintForeignMark(orig_x, font.language());
 330
 331         // Paint the spelling mark if needed.
 332         if (lyxrc.spellcheck_continuously && par_.isMisspelled(pos)) {
 333                 // check for cursor position
 334                 // don't draw misspelled marker for words at cursor position
 335                 // we don't want to disturb the process of text editing
 336                 BufferView const * bv = pi_.base.bv;
 337                 DocIterator const nw = bv->cursor().newWord();
 338                 bool new_word = false;
 339                 if (!nw.empty() && par_.id() == nw.paragraph().id()) {
 340                         pos_type cpos = nw.pos();
 341                         if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
 342                                 --cpos;
 343                         else if (cpos > 0 && par_.isWordSeparator(cpos))
 344                                 --cpos;
 345                         new_word = par_.isSameSpellRange(pos, cpos) ;
 346                 }
 347                 if (!new_word)
 348                         paintMisspelledMark(orig_x, changed);
 349         }
 350 }
 351
 352
 353 void RowPainter::paintChangeBar()
 354 {
 355         pos_type const start = row_.pos();
 356         pos_type end = row_.endpos();
 357
 358         if (par_.size() == end) {
 359                 // this is the last row of the paragraph;
 360                 // thus, we must also consider the imaginary end-of-par character
 361                 end++;
 362         }
 363
 364         if (start == end || !par_.isChanged(start, end))
 365                 return;
 366
 367         int const height = text_metrics_.isLastRow(pit_, row_)
 368                 ? row_.ascent()
 369                 : row_.height();
 370
 371         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 372 }
 373
 374
 375 void RowPainter::paintAppendix()
 376 {
 377         // only draw the appendix frame once (for the main text)
 378         if (!par_.params().appendix() || !text_.isMainText())
 379                 return;
 380
 381         int y = yo_ - row_.ascent();
 382
 383         if (par_.params().startOfAppendix())
 384                 y += 2 * defaultRowHeight();
 385
 386         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 387         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 388 }
 389
 390
 391 void RowPainter::paintDepthBar()
 392 {
 393         depth_type const depth = par_.getDepth();
 394
 395         if (depth <= 0)
 396                 return;
 397
 398         depth_type prev_depth = 0;
 399         if (!text_metrics_.isFirstRow(pit_, row_)) {
 400                 pit_type pit2 = pit_;
 401                 if (row_.pos() == 0)
 402                         --pit2;
 403                 prev_depth = pars_[pit2].getDepth();
 404         }
 405
 406         depth_type next_depth = 0;
 407         if (!text_metrics_.isLastRow(pit_, row_)) {
 408                 pit_type pit2 = pit_;
 409                 if (row_.endpos() >= pars_[pit2].size())
 410                         ++pit2;
 411                 next_depth = pars_[pit2].getDepth();
 412         }
 413
 414         for (depth_type i = 1; i <= depth; ++i) {
 415                 int const w = nestMargin() / 5;
 416                 int x = int(xo_) + w * i;
 417                 // only consider the changebar space if we're drawing outermost text
 418                 if (text_.isMainText())
 419                         x += changebarMargin();
 420
 421                 int const starty = yo_ - row_.ascent();
 422                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 423
 424                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 425
 426                 if (i > prev_depth)
 427                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 428                 if (i > next_depth)
 429                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 430         }
 431 }
 432
 433
 434 int RowPainter::paintAppendixStart(int y)
 435 {
 436         FontInfo pb_font = sane_font;
 437         pb_font.setColor(Color_appendix);
 438         pb_font.decSize();
 439
 440         int w = 0;
 441         int a = 0;
 442         int d = 0;
 443
 444         docstring const label = _("Appendix");
 445         theFontMetrics(pb_font).rectText(label, w, a, d);
 446
 447         int const text_start = int(xo_ + (width_ - w) / 2);
 448         int const text_end = text_start + w;
 449
 450         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 451
 452         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 453         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 454
 455         return 3 * defaultRowHeight();
 456 }
 457
 458
 459 void RowPainter::paintFirst()
 460 {
 461         BufferParams const & bparams = pi_.base.bv->buffer().params();
 462         Layout const & layout = par_.layout();
 463
 464         int y_top = 0;
 465
 466         // start of appendix?
 467         if (par_.params().startOfAppendix())
 468                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 469
 470         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 471                 && pit_ != 0) {
 472                 if (layout.latextype == LATEX_PARAGRAPH
 473                     && !par_.getDepth()) {
 474                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 475                 } else {
 476                         Layout const & playout = pars_[pit_ - 1].layout();
 477                         if (playout.latextype == LATEX_PARAGRAPH
 478                             && !pars_[pit_ - 1].getDepth()) {
 479                                 // is it right to use defskip here, too? (AS)
 480                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 481                         }
 482                 }
 483         }
 484
 485         bool const is_first =
 486                 text_.isFirstInSequence(pit_) || !layout.isParagraphGroup();
 487         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 488
 489         if (layout.labelIsInline()
 490                         && (layout.labeltype != LABEL_STATIC || is_first)) {
 491                 paintLabel();
 492         } else if (is_first && layout.labelIsAbove()) {
 493                 paintTopLevelLabel();
 494         }
 495 }
 496
 497
 498 void RowPainter::paintLabel()
 499 {
 500         docstring const str = par_.labelString();
 501         if (str.empty())
 502                 return;
 503
 504         bool const is_rtl = text_.isRTL(par_);
 505         Layout const & layout = par_.layout();
 506         FontInfo const font = labelFont();
 507         FontMetrics const & fm = theFontMetrics(font);
 508         double x = x_;
 509
 510         if (is_rtl) {
 511                 x = width_ - leftMargin()
 512                         + fm.width(layout.labelsep);
 513         } else {
 514                 x = x_ - fm.width(layout.labelsep)
 515                         - fm.width(str);
 516         }
 517
 518         pi_.pain.text(int(x), yo_, str, font);
 519 }
 520
 521
 522 void RowPainter::paintTopLevelLabel()
 523 {
 524         BufferParams const & bparams = pi_.base.bv->buffer().params();
 525         bool const is_rtl = text_.isRTL(par_);
 526         ParagraphParameters const & pparams = par_.params();
 527         Layout const & layout = par_.layout();
 528         FontInfo const font = labelFont();
 529         docstring const str = par_.labelString();
 530         if (str.empty())
 531                 return;
 532
 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         FontMetrics const & fm = theFontMetrics(font);
 540
 541         int const labeladdon = int(fm.maxHeight()
 542                 * layout.spacing.getValue() * spacing_val);
 543
 544         int maxdesc =
 545                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 546                 + (layout.labelbottomsep * defaultRowHeight()));
 547
 548         double x = x_;
 549         if (layout.labeltype == LABEL_CENTERED) {
 550                 if (is_rtl)
 551                         x = leftMargin();
 552                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 553                 x -= fm.width(str) / 2;
 554         } else if (is_rtl) {
 555                 x = width_ - leftMargin() -     fm.width(str);
 556         }
 557         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 558 }
 559
 560
 561 /** Check if the current paragraph is the last paragraph in a
 562     proof environment */
 563 static int getEndLabel(pit_type p, Text const & text)
 564 {
 565         ParagraphList const & pars = text.paragraphs();
 566         pit_type pit = p;
 567         depth_type par_depth = pars[p].getDepth();
 568         while (pit != pit_type(pars.size())) {
 569                 Layout const & layout = pars[pit].layout();
 570                 int const endlabeltype = layout.endlabeltype;
 571
 572                 if (endlabeltype != END_LABEL_NO_LABEL) {
 573                         if (p + 1 == pit_type(pars.size()))
 574                                 return endlabeltype;
 575
 576                         depth_type const next_depth =
 577                                 pars[p + 1].getDepth();
 578                         if (par_depth > next_depth ||
 579                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 580                                 return endlabeltype;
 581                         break;
 582                 }
 583                 if (par_depth == 0)
 584                         break;
 585                 pit = text.outerHook(pit);
 586                 if (pit != pit_type(pars.size()))
 587                         par_depth = pars[pit].getDepth();
 588         }
 589         return END_LABEL_NO_LABEL;
 590 }
 591
 592
 593 void RowPainter::paintLast()
 594 {
 595         bool const is_rtl = text_.isRTL(par_);
 596         int const endlabel = getEndLabel(pit_, text_);
 597
 598         // paint imaginary end-of-paragraph character
 599
 600         Change const & change = par_.lookupChange(par_.size());
 601         if (change.changed()) {
 602                 FontMetrics const & fm =
 603                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 604                 int const length = fm.maxAscent() / 2;
 605                 Color col = change.color();
 606
 607                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 608                            Painter::line_solid, 3);
 609
 610                 if (change.deleted()) {
 611                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 612                                 yo_ + 2, col, Painter::line_solid, 3);
 613                 } else {
 614                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 615                                 yo_ + 2, col, Painter::line_solid, 3);
 616                 }
 617         }
 618
 619         // draw an endlabel
 620
 621         switch (endlabel) {
 622         case END_LABEL_BOX:
 623         case END_LABEL_FILLED_BOX: {
 624                 FontInfo const font = labelFont();
 625                 FontMetrics const & fm = theFontMetrics(font);
 626                 int const size = int(0.75 * fm.maxAscent());
 627                 int const y = yo_ - size;
 628                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 629                 int x = is_rtl ? nestMargin() + changebarMargin()
 630                         : max_row_width - text_metrics_.rightMargin(pm_);
 631
 632                 // If needed, move the box a bit to avoid overlapping with text.
 633                 int const rem = max_row_width - row_.width();
 634                 if (rem <= 0)
 635                         x += is_rtl ? rem : - rem;
 636
 637                 if (endlabel == END_LABEL_BOX)
 638                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 639                 else
 640                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 641                 break;
 642         }
 643
 644         case END_LABEL_STATIC: {
 645                 FontInfo const font = labelFont();
 646                 FontMetrics const & fm = theFontMetrics(font);
 647                 docstring const & str = par_.layout().endlabelstring();
 648                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 649                 pi_.pain.text(int(x), yo_, str, font);
 650                 break;
 651         }
 652
 653         case END_LABEL_NO_LABEL:
 654                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 655                         docstring const s = docstring(1, char_type(0x00B6));
 656                         FontInfo f = FontInfo(text_.layoutFont(pit_));
 657                         f.setColor(Color_paragraphmarker);
 658                         pi_.pain.text(int(x_), yo_, s, f);
 659                         x_ += theFontMetrics(f).width(s);
 660                 }
 661                 break;
 662         }
 663 }
 664
 665
 666 void RowPainter::paintOnlyInsets()
 667 {
 668         CoordCache const & cache = pi_.base.bv->coordCache();
 669         pos_type const end = row_.endpos();
 670         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 671                 // If outer row has changed, nested insets are repaint completely.
 672                 Inset const * inset = par_.getInset(pos);
 673                 bool const nested_inset = inset &&
 674                                 ((inset->asInsetMath() &&
 675                                   !inset->asInsetMath()->asMacroTemplate())
 676                                  || inset->asInsetText()
 677                                  || inset->asInsetTabular());
 678                 if (!nested_inset)
 679                         continue;
 680                 if (x_ > pi_.base.bv->workWidth()
 681                     || !cache.getInsets().has(inset))
 682                         continue;
 683                 x_ = cache.getInsets().x(inset);
 684
 685                 bool const pi_selected = pi_.selected;
 686                 Cursor const & cur = pi_.base.bv->cursor();
 687                 if (cur.selection() && cur.text() == &text_
 688                           && cur.normalAnchor().text() == &text_)
 689                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 690                 paintInset(inset, pos);
 691                 pi_.selected = pi_selected;
 692         }
 693 }
 694
 695
 696 void RowPainter::paintText()
 697 {
 698         pos_type const end = row_.endpos();
 699         // Spaces at logical line breaks in bidi text must be skipped during
 700         // painting. However, they may appear visually in the middle
 701         // of a row; they must be skipped, wherever they are...
 702         // * logically "abc_[HEBREW_\nHEBREW]"
 703         // * visually "abc_[_WERBEH\nWERBEH]"
 704         pos_type skipped_sep_vpos = -1;
 705         pos_type body_pos = par_.beginOfBody();
 706         if (body_pos > 0 &&
 707                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 708                 body_pos = 0;
 709         }
 710
 711         Layout const & layout = par_.layout();
 712
 713         Change change_running;
 714         int change_last_x = 0;
 715
 716         // check for possible inline completion
 717         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 718         pos_type inlineCompletionVPos = -1;
 719         if (inlineCompletionPos.inTexted()
 720             && inlineCompletionPos.text() == &text_
 721             && inlineCompletionPos.pit() == pit_
 722             && inlineCompletionPos.pos() - 1 >= row_.pos()
 723             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 724                 // draw logically behind the previous character
 725                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 726         }
 727
 728         // Use font span to speed things up, see below
 729         FontSpan font_span;
 730         Font font;
 731
 732         // If the last logical character is a separator, don't paint it, unless
 733         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 734         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 735                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 736
 737         for (pos_type vpos = row_.pos(); vpos < end; ) {
 738                 if (x_ > pi_.base.bv->workWidth())
 739                         break;
 740
 741                 // Skip the separator at the logical end of the row
 742                 if (vpos == skipped_sep_vpos) {
 743                         ++vpos;
 744                         continue;
 745                 }
 746
 747                 pos_type const pos = bidi_.vis2log(vpos);
 748
 749                 if (pos >= par_.size()) {
 750                         ++vpos;
 751                         continue;
 752                 }
 753
 754                 // Use font span to speed things up, see above
 755                 if (vpos < font_span.first || vpos > font_span.last) {
 756                         font_span = par_.fontSpan(vpos);
 757                         font = text_metrics_.displayFont(pit_, vpos);
 758
 759                         // split font span if inline completion is inside
 760                         if (font_span.first <= inlineCompletionVPos
 761                             && font_span.last > inlineCompletionVPos)
 762                                 font_span.last = inlineCompletionVPos;
 763                 }
 764
 765                 const int width_pos = pm_.singleWidth(pos, font);
 766
 767                 if (x_ + width_pos < 0) {
 768                         x_ += width_pos;
 769                         ++vpos;
 770                         continue;
 771                 }
 772                 Change const & change = par_.lookupChange(pos);
 773                 if (change.changed() && !change_running.changed()) {
 774                         change_running = change;
 775                         change_last_x = int(x_);
 776                 }
 777
 778                 Inset const * inset = par_.getInset(pos);
 779                 bool const highly_editable_inset = inset
 780                         && inset->editable();
 781
 782                 // If we reach the end of a change or if the author changes, paint it.
 783                 // We also don't paint across things like tables
 784                 if (change_running.changed() && (highly_editable_inset
 785                         || !change.changed() || !change_running.isSimilarTo(change))) {
 786                         // Calculate 1/3 height of the buffer's default font
 787                         FontMetrics const & fm
 788                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 789                         float const y_bar = change_running.deleted() ?
 790                                 yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 791                         pi_.pain.line(change_last_x, int(y_bar), int(x_), int(y_bar),
 792                                 change_running.color(), Painter::line_solid, solid_line_thickness_);
 793
 794                         // Change might continue with a different author or type
 795                         if (change.changed() && !highly_editable_inset) {
 796                                 change_running = change;
 797                                 change_last_x = int(x_);
 798                         } else
 799                                 change_running.setUnchanged();
 800                 }
 801
 802                 if (body_pos > 0 && pos == body_pos - 1) {
 803                         int const lwidth = theFontMetrics(labelFont())
 804                                 .width(layout.labelsep);
 805
 806                         x_ += row_.label_hfill + lwidth - width_pos;
 807                 }
 808
 809                 // Is the inline completion in front of character?
 810                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 811                         paintInlineCompletion(font);
 812
 813                 if (par_.isSeparator(pos)) {
 814                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 815                         double const orig_x = x_;
 816                         double separator_width = width_pos;
 817                         if (pos >= body_pos)
 818                                 separator_width += row_.separator;
 819                         paintSeparator(orig_x, separator_width, orig_font.fontInfo());
 820                         paintForeignMark(orig_x, orig_font.language());
 821                         ++vpos;
 822
 823                 } else if (inset) {
 824                         // If outer row has changed, nested insets are repaint completely.
 825                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 826
 827                         bool const pi_selected = pi_.selected;
 828                         Cursor const & cur = pi_.base.bv->cursor();
 829                         if (cur.selection() && cur.text() == &text_
 830                                   && cur.normalAnchor().text() == &text_)
 831                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 832                         paintInset(inset, pos);
 833                         pi_.selected = pi_selected;
 834                         ++vpos;
 835
 836                 } else {
 837                         // paint as many characters as possible.
 838                         paintFromPos(vpos, change_running.changed());
 839                 }
 840
 841                 // Is the inline completion after character?
 842                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 843                         paintInlineCompletion(font);
 844         }
 845
 846         // if we reach the end of a struck out range, paint it
 847         if (change_running.changed()) {
 848                 FontMetrics const & fm
 849                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 850                 float const y_bar = change_running.deleted() ?
 851                                 yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 852                 pi_.pain.line(change_last_x, int(y_bar), int(x_), int(y_bar),
 853                         change_running.color(), Painter::line_solid, solid_line_thickness_);
 854                 change_running.setUnchanged();
 855         }
 856 }
 857
 858
 859 void RowPainter::paintSelection()
 860 {
 861         if (!row_.selection())
 862                 return;
 863         Cursor const & curs = pi_.base.bv->cursor();
 864         DocIterator beg = curs.selectionBegin();
 865         beg.pit() = pit_;
 866         beg.pos() = row_.sel_beg;
 867
 868         DocIterator end = curs.selectionEnd();
 869         end.pit() = pit_;
 870         end.pos() = row_.sel_end;
 871
 872         bool const begin_boundary = beg.pos() >= row_.endpos();
 873         bool const end_boundary = row_.sel_end == row_.endpos();
 874
 875         DocIterator cur = beg;
 876         cur.boundary(begin_boundary);
 877         int x1 = text_metrics_.cursorX(beg.top(), begin_boundary);
 878         int x2 = text_metrics_.cursorX(end.top(), end_boundary);
 879         int const y1 = yo_ - row_.ascent();
 880         int const y2 = y1 + row_.height();
 881
 882         int const rm = text_.isMainText() ? pi_.base.bv->rightMargin() : 0;
 883         int const lm = text_.isMainText() ? pi_.base.bv->leftMargin() : 0;
 884
 885         // draw the margins
 886         if (row_.begin_margin_sel) {
 887                 if (text_.isRTL(beg.paragraph())) {
 888                         pi_.pain.fillRectangle(int(xo_ + x1), y1,
 889                                 text_metrics_.width() - rm - x1, y2 - y1, Color_selection);
 890                 } else {
 891                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x1 - lm, y2 - y1,
 892                                 Color_selection);
 893                 }
 894         }
 895
 896         if (row_.end_margin_sel) {
 897                 if (text_.isRTL(beg.paragraph())) {
 898                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x2 - lm, y2 - y1,
 899                                 Color_selection);
 900                 } else {
 901                         pi_.pain.fillRectangle(int(xo_ + x2), y1, text_metrics_.width() - rm - x2,
 902                                 y2 - y1, Color_selection);
 903                 }
 904         }
 905
 906         // if we are on a boundary from the beginning, it's probably
 907         // a RTL boundary and we jump to the other side directly as this
 908         // segement is 0-size and confuses the logic below
 909         if (cur.boundary())
 910                 cur.boundary(false);
 911
 912         // go through row and draw from RTL boundary to RTL boundary
 913         while (cur < end) {
 914                 bool draw_now = false;
 915
 916                 // simplified cursorForward code below which does not
 917                 // descend into insets and which does not go into the
 918                 // next line. Compare the logic with the original cursorForward
 919
 920                 // if left of boundary -> just jump to right side, but
 921                 // for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
 922                 if (cur.boundary()) {
 923                         cur.boundary(false);
 924                 }       else if (text_metrics_.isRTLBoundary(cur.pit(), cur.pos() + 1)) {
 925                         // in front of RTL boundary -> Stay on this side of the boundary
 926                         // because:  ab|cDDEEFFghi -> abc|DDEEFFghi
 927                         ++cur.pos();
 928                         cur.boundary(true);
 929                         draw_now = true;
 930                 } else {
 931                         // move right
 932                         ++cur.pos();
 933
 934                         // line end?
 935                         if (cur.pos() == row_.endpos())
 936                                 cur.boundary(true);
 937                 }
 938
 939                 if (x1 == -1) {
 940                         // the previous segment was just drawn, now the next starts
 941                         x1 = text_metrics_.cursorX(cur.top(), cur.boundary());
 942                 }
 943
 944                 if (!(cur < end) || draw_now) {
 945                         x2 = text_metrics_.cursorX(cur.top(), cur.boundary());
 946                         pi_.pain.fillRectangle(int(xo_ + min(x1, x2)), y1, abs(x2 - x1),
 947                                 y2 - y1, Color_selection);
 948
 949                         // reset x1, so it is set again next round (which will be on the
 950                         // right side of a boundary or at the selection end)
 951                         x1 = -1;
 952                 }
 953         }
 954 }
 955
 956
 957 void RowPainter::paintInlineCompletion(Font const & font)
 958 {
 959         docstring completion = pi_.base.bv->inlineCompletion();
 960         FontInfo f = font.fontInfo();
 961         bool rtl = font.isRightToLeft();
 962
 963         // draw the unique and the non-unique completion part
 964         // Note: this is not time-critical as it is
 965         // only done once per screen.
 966         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 967         docstring s1 = completion.substr(0, uniqueTo);
 968         docstring s2 = completion.substr(uniqueTo);
 969         ColorCode c1 = Color_inlinecompletion;
 970         ColorCode c2 = Color_nonunique_inlinecompletion;
 971
 972         // right to left?
 973         if (rtl) {
 974                 swap(s1, s2);
 975                 swap(c1, c2);
 976         }
 977
 978         if (!s1.empty()) {
 979                 f.setColor(c1);
 980                 pi_.pain.text(int(x_), yo_, s1, f);
 981                 x_ += theFontMetrics(font).width(s1);
 982         }
 983
 984         if (!s2.empty()) {
 985                 f.setColor(c2);
 986                 pi_.pain.text(int(x_), yo_, s2, f);
 987                 x_ += theFontMetrics(font).width(s2);
 988         }
 989 }
 990
 991 } // namespace lyx