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), solid_line_offset_(1),
  65           dotted_line_thickness_(1), dotted_line_offset_(2)
  66 {
  67         if (lyxrc.zoom >= 200) {
  68                 // derive the line thickness from zoom factor
  69                 // the zoom is given in percent
  70                 // (increase thickness at 250%, 450% etc.)
  71                 solid_line_thickness_ = (lyxrc.zoom + 50) / 200;
  72                 // adjust line_offset_ too
  73                 solid_line_offset_ = 1 + solid_line_thickness_ / 2;
  74         }
  75         if (lyxrc.zoom >= 100) {
  76                 // derive the line thickness from zoom factor
  77                 // the zoom is given in percent
  78                 // (increase thickness at 150%, 250% etc.)
  79                 dotted_line_thickness_ = (lyxrc.zoom + 50) / 100;
  80                 // adjust line_offset_ too
  81                 dotted_line_offset_ = 1 + dotted_line_thickness_ / 2;
  82         }
  83
  84         x_ = row_.left_margin + xo_;
  85
  86         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  87         //row_.dump();
  88
  89         LBUFERR(pit >= 0);
  90         LBUFERR(pit < int(text.paragraphs().size()));
  91 }
  92
  93
  94 FontInfo RowPainter::labelFont() const
  95 {
  96         FontInfo f = text_.labelFont(par_);
  97         // selected text?
  98         if (row_.begin_margin_sel || pi_.selected)
  99                 f.setPaintColor(Color_selectiontext);
 100         return f;
 101 }
 102
 103
 104 // If you want to debug inset metrics uncomment the following line:
 105 //#define DEBUG_METRICS
 106 // This draws green lines around each inset.
 107
 108
 109 void RowPainter::paintInset(Inset const * inset, Font const & font,
 110                             Change const & change,
 111                             pos_type const pos)
 112 {
 113         // Handle selection
 114         bool const pi_selected = pi_.selected;
 115         Cursor const & cur = pi_.base.bv->cursor();
 116         if (cur.selection() && cur.text() == &text_
 117                 && cur.normalAnchor().text() == &text_)
 118                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 119
 120         LASSERT(inset, return);
 121         // Backup full_repaint status because some insets (InsetTabular)
 122         // requires a full repaint
 123         bool const pi_full_repaint = pi_.full_repaint;
 124         bool const pi_do_spellcheck = pi_.do_spellcheck;
 125         Change const pi_change = pi_.change_;
 126
 127         pi_.base.font = inset->inheritFont() ? font.fontInfo() :
 128                 pi_.base.bv->buffer().params().getFont().fontInfo();
 129         pi_.ltr_pos = !font.isVisibleRightToLeft();
 130         pi_.change_ = change_.changed() ? change_ : change;
 131         pi_.do_spellcheck &= inset->allowSpellCheck();
 132
 133         int const x1 = int(x_);
 134         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 135         // insets are painted completely. Recursive
 136         // FIXME: it is wrong to completely paint the background
 137         // if we want to do single row painting.
 138         inset->drawBackground(pi_, x1, yo_);
 139         inset->drawSelection(pi_, x1, yo_);
 140         inset->draw(pi_, x1, yo_);
 141
 142         Dimension const & dim = pi_.base.bv->coordCache().insets().dim(inset);
 143
 144         paintForeignMark(x_, font.language(), dim.descent());
 145
 146         x_ += dim.width();
 147
 148         // Restore full_repaint status.
 149         pi_.full_repaint = pi_full_repaint;
 150         pi_.change_ = pi_change;
 151         pi_.do_spellcheck = pi_do_spellcheck;
 152         pi_.selected = pi_selected;
 153
 154 #ifdef DEBUG_METRICS
 155         int const x2 = x1 + dim.wid;
 156         int const y1 = yo_ + dim.des;
 157         int const y2 = yo_ - dim.asc;
 158         pi_.pain.line(x1, y1, x1, y2, Color_green);
 159         pi_.pain.line(x1, y1, x2, y1, Color_green);
 160         pi_.pain.line(x2, y1, x2, y2, Color_green);
 161         pi_.pain.line(x1, y2, x2, y2, Color_green);
 162 #endif
 163 }
 164
 165
 166 void RowPainter::paintForeignMark(double orig_x, Language const * lang, int desc) const
 167 {
 168         if (!lyxrc.mark_foreign_language)
 169                 return;
 170         if (lang == latex_language)
 171                 return;
 172         if (lang == pi_.base.bv->buffer().params().language)
 173                 return;
 174
 175         int const y = yo_ + solid_line_offset_ + desc + solid_line_thickness_ / 2;
 176         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language,
 177                 Painter::line_solid, solid_line_thickness_);
 178 }
 179
 180
 181 void RowPainter::paintMisspelledMark(double const orig_x,
 182                                      Row::Element const & e) const
 183 {
 184         // if changed the misspelled marker gets placed slightly lower than normal
 185         // to avoid drawing at the same vertical offset
 186         int const y = yo_ + solid_line_offset_ + solid_line_thickness_
 187                 + (e.change.changed() ? solid_line_thickness_ + 1 : 0)
 188                 + dotted_line_offset_;
 189
 190         //FIXME: this could be computed only once, it is probably not costly.
 191         // check for cursor position
 192         // don't draw misspelled marker for words at cursor position
 193         // we don't want to disturb the process of text editing
 194         DocIterator const nw = pi_.base.bv->cursor().newWord();
 195         pos_type cpos = -1;
 196         if (!nw.empty() && par_.id() == nw.paragraph().id()) {
 197                 cpos = nw.pos();
 198                 if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
 199                         --cpos;
 200                 else if (cpos > 0 && par_.isWordSeparator(cpos))
 201                         --cpos;
 202         }
 203
 204         pos_type pos = e.pos;
 205         while (pos < e.pos + pos_type(e.str.length())) {
 206                 if (!par_.isMisspelled(pos)) {
 207                         ++pos;
 208                         continue;
 209                 }
 210
 211                 FontSpan const & range = par_.getSpellRange(pos);
 212
 213                 // Skip element which are being edited
 214                 if (range.contains(cpos)) {
 215                         // the range includes the last element
 216                         pos = range.last + 1;
 217                         continue;
 218                 }
 219
 220                 FontMetrics const & fm = theFontMetrics(e.font);
 221                 int x1 = fm.pos2x(e.str, range.first - e.pos,
 222                                   e.isRTL(), e.extra);
 223                 int x2 = fm.pos2x(e.str, min(range.last - e.pos + 1,
 224                                                                          pos_type(e.str.length())),
 225                                                                          e.isRTL(), e.extra);
 226                 if (x1 > x2)
 227                         swap(x1, x2);
 228
 229                 pi_.pain.line(int(orig_x) + x1, y, int(orig_x) + x2, y,
 230                               Color_error,
 231                               Painter::line_onoffdash, dotted_line_thickness_);
 232                 pos = range.last + 1;
 233         }
 234 }
 235
 236
 237 void RowPainter::paintStringAndSel(Row::Element const & e)
 238 {
 239         // at least part of text selected?
 240         bool const some_sel = (e.endpos >= row_.sel_beg && e.pos < row_.sel_end)
 241                 || pi_.selected;
 242         // all the text selected?
 243         bool const all_sel = (e.pos >= row_.sel_beg && e.endpos < row_.sel_end)
 244                 || pi_.selected;
 245
 246         if (all_sel) {
 247                 Font copy = e.font;
 248                 copy.fontInfo().setPaintColor(Color_selectiontext);
 249                 pi_.pain.text(int(x_), yo_, e.str, copy, e.extra);
 250         } else if (e.change.changed()) {
 251                 Font copy = e.font;
 252                 copy.fontInfo().setPaintColor(e.change.color());
 253                 pi_.pain.text(int(x_), yo_, e.str, copy, e.extra);
 254         } else if (!some_sel) {
 255                 pi_.pain.text(int(x_), yo_, e.str, e.font, e.extra);
 256         } else {
 257                 pi_.pain.text(int(x_), yo_, e.str, e.font, Color_selectiontext,
 258                                     max(row_.sel_beg, e.pos) - e.pos,
 259                         min(row_.sel_end, e.endpos) - e.pos, e.extra);
 260         }
 261         x_ += e.full_width();
 262 }
 263
 264
 265 void RowPainter::paintChange(double orig_x, Font const & font,
 266                              Change const & change) const
 267 {
 268         if (!change.changed())
 269                 return;
 270         // Calculate 1/3 height of font
 271         FontMetrics const & fm = theFontMetrics(font);
 272         int const y_bar = change.deleted() ? yo_ - fm.maxAscent() / 3
 273                 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 274         pi_.pain.line(int(orig_x), y_bar, int(x_), y_bar,
 275                       change.color(), Painter::line_solid, solid_line_thickness_);
 276 }
 277
 278
 279 void RowPainter::paintChangeBar() const
 280 {
 281         pos_type const start = row_.pos();
 282         pos_type end = row_.endpos();
 283
 284         if (par_.size() == end) {
 285                 // this is the last row of the paragraph;
 286                 // thus, we must also consider the imaginary end-of-par character
 287                 end++;
 288         }
 289
 290         if (start == end || !par_.isChanged(start, end))
 291                 return;
 292
 293         int const height = text_metrics_.isLastRow(pit_, row_)
 294                 ? row_.ascent()
 295                 : row_.height();
 296
 297         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 298 }
 299
 300
 301 void RowPainter::paintAppendix() const
 302 {
 303         // only draw the appendix frame once (for the main text)
 304         if (!par_.params().appendix() || !text_.isMainText())
 305                 return;
 306
 307         int y = yo_ - row_.ascent();
 308
 309         if (par_.params().startOfAppendix())
 310                 y += 2 * defaultRowHeight();
 311
 312         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 313         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 314 }
 315
 316
 317 void RowPainter::paintDepthBar() const
 318 {
 319         depth_type const depth = par_.getDepth();
 320
 321         if (depth <= 0)
 322                 return;
 323
 324         depth_type prev_depth = 0;
 325         if (!text_metrics_.isFirstRow(pit_, row_)) {
 326                 pit_type pit2 = pit_;
 327                 if (row_.pos() == 0)
 328                         --pit2;
 329                 prev_depth = pars_[pit2].getDepth();
 330         }
 331
 332         depth_type next_depth = 0;
 333         if (!text_metrics_.isLastRow(pit_, row_)) {
 334                 pit_type pit2 = pit_;
 335                 if (row_.endpos() >= pars_[pit2].size())
 336                         ++pit2;
 337                 next_depth = pars_[pit2].getDepth();
 338         }
 339
 340         for (depth_type i = 1; i <= depth; ++i) {
 341                 int const w = nestMargin() / 5;
 342                 int x = int(xo_) + w * i;
 343                 // only consider the changebar space if we're drawing outermost text
 344                 if (text_.isMainText())
 345                         x += changebarMargin();
 346
 347                 int const starty = yo_ - row_.ascent();
 348                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 349
 350                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 351
 352                 if (i > prev_depth)
 353                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 354                 if (i > next_depth)
 355                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 356         }
 357 }
 358
 359
 360 void RowPainter::paintAppendixStart(int y) const
 361 {
 362         FontInfo pb_font = sane_font;
 363         pb_font.setColor(Color_appendix);
 364         pb_font.decSize();
 365
 366         int w = 0;
 367         int a = 0;
 368         int d = 0;
 369
 370         docstring const label = _("Appendix");
 371         theFontMetrics(pb_font).rectText(label, w, a, d);
 372
 373         int const text_start = int(xo_ + (width_ - w) / 2);
 374         int const text_end = text_start + w;
 375
 376         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 377
 378         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 379         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 380 }
 381
 382
 383 void RowPainter::paintTooLargeMarks(bool const left, bool const right) const
 384 {
 385         if (left)
 386                 pi_.pain.line(dotted_line_thickness_, yo_ - row_.ascent(),
 387                                           dotted_line_thickness_, yo_ + row_.descent(),
 388                                           Color_scroll,
 389                                           Painter::line_onoffdash, dotted_line_thickness_);
 390         if (right) {
 391                 int const wwidth = pi_.base.bv->workWidth() - dotted_line_thickness_;
 392                 pi_.pain.line(wwidth, yo_ - row_.ascent(),
 393                                           wwidth, yo_ + row_.descent(),
 394                                           Color_scroll,
 395                                           Painter::line_onoffdash, dotted_line_thickness_);
 396         }
 397 }
 398
 399
 400 void RowPainter::paintFirst() const
 401 {
 402         Layout const & layout = par_.layout();
 403
 404         // start of appendix?
 405         if (par_.params().startOfAppendix())
 406             paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 407
 408         bool const is_first =
 409                 text_.isFirstInSequence(pit_) || !layout.isParagraphGroup();
 410         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 411
 412         if (layout.labelIsInline()
 413             && (layout.labeltype != LABEL_STATIC || is_first))
 414                 paintLabel();
 415         else if (is_first && layout.labelIsAbove())
 416                 paintTopLevelLabel();
 417 }
 418
 419
 420 void RowPainter::paintLabel() const
 421 {
 422         docstring const str = par_.labelString();
 423         if (str.empty())
 424                 return;
 425
 426         bool const is_rtl = text_.isRTL(par_);
 427         Layout const & layout = par_.layout();
 428         FontInfo const font = labelFont();
 429         FontMetrics const & fm = theFontMetrics(font);
 430         double x = x_;
 431
 432         if (is_rtl)
 433                 x = width_ - row_.right_margin + fm.width(layout.labelsep);
 434         else
 435                 x = x_ - fm.width(layout.labelsep) - fm.width(str);
 436
 437         pi_.pain.text(int(x), yo_, str, font);
 438 }
 439
 440
 441 void RowPainter::paintTopLevelLabel() const
 442 {
 443         BufferParams const & bparams = pi_.base.bv->buffer().params();
 444         bool const is_rtl = text_.isRTL(par_);
 445         ParagraphParameters const & pparams = par_.params();
 446         Layout const & layout = par_.layout();
 447         FontInfo const font = labelFont();
 448         docstring const str = par_.labelString();
 449         if (str.empty())
 450                 return;
 451
 452         double spacing_val = 1.0;
 453         if (!pparams.spacing().isDefault())
 454                 spacing_val = pparams.spacing().getValue();
 455         else
 456                 spacing_val = bparams.spacing().getValue();
 457
 458         FontMetrics const & fm = theFontMetrics(font);
 459
 460         int const labeladdon = int(fm.maxHeight()
 461                 * layout.spacing.getValue() * spacing_val);
 462
 463         int maxdesc =
 464                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 465                 + (layout.labelbottomsep * defaultRowHeight()));
 466
 467         double x = x_;
 468         if (layout.labeltype == LABEL_CENTERED) {
 469                 x = row_.left_margin + (width_ - row_.left_margin - row_.right_margin) / 2;
 470                 x -= fm.width(str) / 2;
 471         } else if (is_rtl) {
 472                 x = width_ - row_.right_margin - fm.width(str);
 473         }
 474         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 475 }
 476
 477
 478 /** Check if the current paragraph is the last paragraph in a
 479     proof environment */
 480 static int getEndLabel(pit_type p, Text const & text)
 481 {
 482         ParagraphList const & pars = text.paragraphs();
 483         pit_type pit = p;
 484         depth_type par_depth = pars[p].getDepth();
 485         while (pit != pit_type(pars.size())) {
 486                 Layout const & layout = pars[pit].layout();
 487                 int const endlabeltype = layout.endlabeltype;
 488
 489                 if (endlabeltype != END_LABEL_NO_LABEL) {
 490                         if (p + 1 == pit_type(pars.size()))
 491                                 return endlabeltype;
 492
 493                         depth_type const next_depth =
 494                                 pars[p + 1].getDepth();
 495                         if (par_depth > next_depth ||
 496                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 497                                 return endlabeltype;
 498                         break;
 499                 }
 500                 if (par_depth == 0)
 501                         break;
 502                 pit = text.outerHook(pit);
 503                 if (pit != pit_type(pars.size()))
 504                         par_depth = pars[pit].getDepth();
 505         }
 506         return END_LABEL_NO_LABEL;
 507 }
 508
 509
 510 void RowPainter::paintLast()
 511 {
 512         bool const is_rtl = text_.isRTL(par_);
 513         int const endlabel = getEndLabel(pit_, text_);
 514
 515         // paint imaginary end-of-paragraph character
 516
 517         Change const & change = par_.lookupChange(par_.size());
 518         if (change.changed()) {
 519                 FontMetrics const & fm =
 520                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 521                 int const length = fm.maxAscent() / 2;
 522                 Color col = change.color();
 523
 524                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 525                            Painter::line_solid, 3);
 526
 527                 if (change.deleted()) {
 528                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 529                                 yo_ + 2, col, Painter::line_solid, 3);
 530                 } else {
 531                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 532                                 yo_ + 2, col, Painter::line_solid, 3);
 533                 }
 534         }
 535
 536         // draw an endlabel
 537
 538         switch (endlabel) {
 539         case END_LABEL_BOX:
 540         case END_LABEL_FILLED_BOX: {
 541                 FontInfo const font = labelFont();
 542                 FontMetrics const & fm = theFontMetrics(font);
 543                 int const size = int(0.75 * fm.maxAscent());
 544                 int const y = yo_ - size;
 545                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 546                 int x = is_rtl ? nestMargin() + changebarMargin()
 547                         : max_row_width - row_.right_margin;
 548
 549                 // If needed, move the box a bit to avoid overlapping with text.
 550                 int const rem = max_row_width - row_.width();
 551                 if (rem <= 0)
 552                         x += is_rtl ? rem : - rem;
 553
 554                 if (endlabel == END_LABEL_BOX)
 555                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 556                 else
 557                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 558                 break;
 559         }
 560
 561         case END_LABEL_STATIC: {
 562                 FontInfo const font = labelFont();
 563                 FontMetrics const & fm = theFontMetrics(font);
 564                 docstring const & str = par_.layout().endlabelstring();
 565                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 566                 pi_.pain.text(int(x), yo_, str, font);
 567                 break;
 568         }
 569
 570         case END_LABEL_NO_LABEL:
 571                 break;
 572         }
 573 }
 574
 575
 576 void RowPainter::paintOnlyInsets()
 577 {
 578         Row::const_iterator cit = row_.begin();
 579         Row::const_iterator const & end = row_.end();
 580         for ( ; cit != end ; ++cit) {
 581                 Row::Element const & e = *cit;
 582                 if (e.type == Row::INSET) {
 583                         // If outer row has changed, nested insets are repainted completely.
 584                         pi_.base.bv->coordCache().insets().add(e.inset, int(x_), yo_);
 585                         bool const nested_inset =
 586                                 (e.inset->asInsetMath() && !e.inset->asInsetMath()->asMacroTemplate())
 587                                 || e.inset->asInsetText() || e.inset->asInsetTabular();
 588                         if (!nested_inset) {
 589                                 x_ += e.full_width();
 590                                 continue;
 591                         }
 592                         paintInset(e.inset, e.font, e.change, e.pos);
 593                 } else
 594                         x_ += e.full_width();
 595         }
 596 }
 597
 598
 599 void RowPainter::paintText()
 600 {
 601         Row::const_iterator cit = row_.begin();
 602         Row::const_iterator const & end = row_.end();
 603         for ( ; cit != end ; ++cit) {
 604                 double const orig_x = x_;
 605                 Row::Element const & e = *cit;
 606                 int foreign_descent = 0;
 607
 608                 switch (e.type) {
 609                 case Row::STRING:
 610                 case Row::VIRTUAL:
 611                         paintStringAndSel(e);
 612
 613                         // Paint the spelling marks if enabled.
 614                         if (lyxrc.spellcheck_continuously && pi_.do_spellcheck)
 615                                 paintMisspelledMark(orig_x, e);
 616                         break;
 617                 case Row::INSET: {
 618                         // If outer row has changed, nested insets are repaint completely.
 619                         pi_.base.bv->coordCache().insets().add(e.inset, int(x_), yo_);
 620                         paintInset(e.inset, e.font, e.change, e.pos);
 621                         foreign_descent = e.dim.descent();
 622                 }
 623                         break;
 624                 case Row::SPACE:
 625                         pi_.pain.textDecoration(e.font.fontInfo(), int(x_), yo_, int(e.full_width()));
 626                         x_ += e.full_width();
 627                 }
 628
 629                 // The line that indicates word in a different language
 630                 paintForeignMark(orig_x, e.font.language(), foreign_descent);
 631
 632                 // change tracking (not for insets that track their own changes)
 633                 if (e.type != Row::INSET || ! e.inset->canTrackChanges())
 634                         paintChange(orig_x, e.font, e.change);
 635         }
 636 }
 637
 638
 639 void RowPainter::paintSelection() const
 640 {
 641         if (!row_.selection())
 642                 return;
 643         Cursor const & curs = pi_.base.bv->cursor();
 644         DocIterator beg = curs.selectionBegin();
 645         beg.pit() = pit_;
 646         beg.pos() = row_.sel_beg;
 647
 648         DocIterator end = curs.selectionEnd();
 649         end.pit() = pit_;
 650         end.pos() = row_.sel_end;
 651
 652         bool const begin_boundary = beg.pos() >= row_.endpos();
 653         bool const end_boundary = row_.sel_end == row_.endpos();
 654
 655         DocIterator cur = beg;
 656         cur.boundary(begin_boundary);
 657         int x1 = text_metrics_.cursorX(beg.top(), begin_boundary);
 658         int x2 = text_metrics_.cursorX(end.top(), end_boundary);
 659         int const y1 = yo_ - row_.ascent();
 660         int const y2 = y1 + row_.height();
 661
 662         int const rm = text_.isMainText() ? pi_.base.bv->rightMargin() : 0;
 663         int const lm = text_.isMainText() ? pi_.base.bv->leftMargin() : 0;
 664
 665         // draw the margins
 666         if (row_.begin_margin_sel) {
 667                 if (text_.isRTL(beg.paragraph())) {
 668                         pi_.pain.fillRectangle(int(xo_ + x1), y1,
 669                                 text_metrics_.width() - rm - x1, y2 - y1, Color_selection);
 670                 } else {
 671                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x1 - lm, y2 - y1,
 672                                 Color_selection);
 673                 }
 674         }
 675
 676         if (row_.end_margin_sel) {
 677                 if (text_.isRTL(beg.paragraph())) {
 678                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x2 - lm, y2 - y1,
 679                                 Color_selection);
 680                 } else {
 681                         pi_.pain.fillRectangle(int(xo_ + x2), y1, text_metrics_.width() - rm - x2,
 682                                 y2 - y1, Color_selection);
 683                 }
 684         }
 685
 686         // if we are on a boundary from the beginning, it's probably
 687         // a RTL boundary and we jump to the other side directly as this
 688         // segement is 0-size and confuses the logic below
 689         if (cur.boundary())
 690                 cur.boundary(false);
 691
 692         // go through row and draw from RTL boundary to RTL boundary
 693         while (cur < end) {
 694                 bool draw_now = false;
 695
 696                 // simplified cursorForward code below which does not
 697                 // descend into insets and which does not go into the
 698                 // next line. Compare the logic with the original cursorForward
 699
 700                 // if left of boundary -> just jump to right side, but
 701                 // for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
 702                 if (cur.boundary()) {
 703                         cur.boundary(false);
 704                 }       else if (text_metrics_.isRTLBoundary(cur.pit(), cur.pos() + 1)) {
 705                         // in front of RTL boundary -> Stay on this side of the boundary
 706                         // because:  ab|cDDEEFFghi -> abc|DDEEFFghi
 707                         ++cur.pos();
 708                         cur.boundary(true);
 709                         draw_now = true;
 710                 } else {
 711                         // move right
 712                         ++cur.pos();
 713
 714                         // line end?
 715                         if (cur.pos() == row_.endpos())
 716                                 cur.boundary(true);
 717                 }
 718
 719                 if (x1 == -1) {
 720                         // the previous segment was just drawn, now the next starts
 721                         x1 = text_metrics_.cursorX(cur.top(), cur.boundary());
 722                 }
 723
 724                 if (!(cur < end) || draw_now) {
 725                         x2 = text_metrics_.cursorX(cur.top(), cur.boundary());
 726                         pi_.pain.fillRectangle(int(xo_ + min(x1, x2)), y1, abs(x2 - x1),
 727                                 y2 - y1, Color_selection);
 728
 729                         // reset x1, so it is set again next round (which will be on the
 730                         // right side of a boundary or at the selection end)
 731                         x1 = -1;
 732                 }
 733         }
 734 }
 735
 736
 737 } // namespace lyx