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