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 "Encoding.h"
  24 #include "Language.h"
  25 #include "Layout.h"
  26 #include "LyXRC.h"
  27 #include "Row.h"
  28 #include "MetricsInfo.h"
  29 #include "Paragraph.h"
  30 #include "ParagraphMetrics.h"
  31 #include "ParagraphParameters.h"
  32 #include "TextMetrics.h"
  33 #include "VSpace.h"
  34
  35 #include "frontends/FontMetrics.h"
  36 #include "frontends/Painter.h"
  37
  38 #include "insets/InsetText.h"
  39
  40 #include "mathed/InsetMath.h"
  41
  42 #include "support/debug.h"
  43 #include "support/gettext.h"
  44 #include "support/textutils.h"
  45
  46 #include "support/lassert.h"
  47 #include <boost/crc.hpp>
  48
  49 using namespace std;
  50
  51 namespace lyx {
  52
  53 using frontend::Painter;
  54 using frontend::FontMetrics;
  55
  56
  57 RowPainter::RowPainter(PainterInfo & pi,
  58         Text const & text, pit_type pit, Row const & row, int x, int y)
  59         : pi_(pi), text_(text),
  60           text_metrics_(pi_.base.bv->textMetrics(&text)),
  61           pars_(text.paragraphs()),
  62           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  63           pm_(text_metrics_.parMetrics(pit)), change_(pi_.change_),
  64           xo_(x), yo_(y), width_(text_metrics_.width()),
  65           solid_line_thickness_(1.0), solid_line_offset_(1),
  66           dotted_line_thickness_(1.0), dotted_line_offset_(2)
  67 {
  68         bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
  69
  70         if (lyxrc.zoom >= 200) {
  71                 // derive the line thickness from zoom factor
  72                 // the zoom is given in percent
  73                 // (increase thickness at 250%, 450% etc.)
  74                 solid_line_thickness_ = (float)(int((lyxrc.zoom + 50) / 200.0));
  75                 // adjust line_offset_ too
  76                 solid_line_offset_ = 1 + int(0.5 * solid_line_thickness_);
  77         }
  78         if (lyxrc.zoom >= 100) {
  79                 // derive the line thickness from zoom factor
  80                 // the zoom is given in percent
  81                 // (increase thickness at 150%, 250% etc.)
  82                 dotted_line_thickness_ = (float)(int((lyxrc.zoom + 50) / 100.0));
  83                 // adjust line_offset_ too
  84                 dotted_line_offset_ = int(0.5 * dotted_line_thickness_) + 1;
  85         }
  86
  87         x_ = row_.x + xo_;
  88
  89         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  90         //row_.dump();
  91
  92         LBUFERR(pit >= 0);
  93         LBUFERR(pit < int(text.paragraphs().size()));
  94 }
  95
  96
  97 FontInfo RowPainter::labelFont() const
  98 {
  99         FontInfo f = text_.labelFont(par_);
 100         // selected text?
 101         if (row_.begin_margin_sel || pi_.selected)
 102                 f.setPaintColor(Color_selectiontext);
 103         return f;
 104 }
 105
 106
 107 int RowPainter::leftMargin() const
 108 {
 109         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
 110                 row_.pos());
 111 }
 112
 113 // If you want to debug inset metrics uncomment the following line:
 114 //#define DEBUG_METRICS
 115 // This draws green lines around each inset.
 116
 117
 118 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
 119 {
 120         Font const font = text_metrics_.displayFont(pit_, pos);
 121
 122         LASSERT(inset, return);
 123         // Backup full_repaint status because some insets (InsetTabular)
 124         // requires a full repaint
 125         bool pi_full_repaint = pi_.full_repaint;
 126
 127         pi_.base.font = inset->inheritFont() ? font.fontInfo() :
 128                 pi_.base.bv->buffer().params().getFont().fontInfo();
 129         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 130         Change prev_change = change_;
 131         pi_.change_ = change_.changed() ? change_ : par_.lookupChange(pos);
 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 = pm_.insetDimension(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_ = prev_change;
 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::paintChars(pos_type & vpos, Font const & font)
 165 {
 166         // This method takes up 70% of time when typing
 167         pos_type pos = bidi_.vis2log(vpos);
 168         // first character
 169         char_type prev_char = par_.getChar(pos);
 170         vector<char_type> str;
 171         str.reserve(100);
 172         str.push_back(prev_char);
 173
 174         // special case for arabic
 175         string const & lang = font.language()->lang();
 176         bool const swap_paren = lang == "arabic_arabtex"
 177                 || lang == "arabic_arabi"
 178                 || lang == "farsi";
 179
 180         // FIXME: Why only round brackets and why the difference to
 181         // Hebrew? See also Paragraph::getUChar
 182         if (swap_paren) {
 183                 char_type c = str[0];
 184                 if (c == '(')
 185                         c = ')';
 186                 else if (c == ')')
 187                         c = '(';
 188                 str[0] = c;
 189         }
 190
 191         pos_type const end = row_.endpos();
 192         FontSpan const font_span = par_.fontSpan(pos);
 193         // Track-change status.
 194         Change const & change_running = par_.lookupChange(pos);
 195
 196         // selected text?
 197         bool const selection = (pos >= row_.sel_beg && pos < row_.sel_end)
 198                 || pi_.selected;
 199
 200         // spelling correct?
 201         bool const spell_state =
 202                 lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 203
 204         // are we building a RtL string?
 205         //FIXME: I would like to use the new isRTL() from textutils.h,
 206         // but it does not give the same results for some reason I do
 207         // not understand.
 208         bool const rtl = Encodings::isArabicChar(str[0]) || Encodings::isHebrewChar(str[0]);
 209
 210         // collect as much similar chars as we can
 211         for (++vpos ; vpos < end ; ++vpos) {
 212                 if (lyxrc.force_paint_single_char)
 213                         break;
 214
 215                 pos = bidi_.vis2log(vpos);
 216                 if (pos < font_span.first || pos > font_span.last)
 217                         break;
 218
 219                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 220                 if (new_selection != selection)
 221                         // Selection ends or starts here.
 222                         break;
 223
 224                 bool const new_spell_state =
 225                         lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 226                 if (new_spell_state != spell_state)
 227                         // Spell checker state changed here.
 228                         break;
 229
 230                 Change const & change = par_.lookupChange(pos);
 231                 if (!change_running.isSimilarTo(change))
 232                         // Track change type or author has changed.
 233                         break;
 234
 235                 char_type c = par_.getChar(pos);
 236
 237                 //FIXME: I would like to use the new isRTL() from textutils.h,
 238                 // but it does not give the same results for some reason I do
 239                 // not understand.
 240                 bool const new_rtl = Encodings::isArabicChar(c) || Encodings::isHebrewChar(c);
 241                 if (new_rtl != rtl)
 242                         // String direction has changed
 243                         break;
 244
 245                 if (c == '\t')
 246                         break;
 247
 248                 if (!isPrintableNonspace(c))
 249                         break;
 250
 251                 // FIXME: Why only round brackets and why the difference to
 252                 // Hebrew? See also Paragraph::getUChar
 253                 if (swap_paren) {
 254                         if (c == '(')
 255                                 c = ')';
 256                         else if (c == ')')
 257                                 c = '(';
 258                 }
 259
 260                 str.push_back(c);
 261                 prev_char = c;
 262         }
 263
 264         docstring s(&str[0], str.size());
 265
 266         /* Because we do our own bidi, at this point the strings are
 267          * already in visual order. However, Qt also applies its own
 268          * bidi algorithm to strings that it paints to the screen.
 269          * Therefore, if we were to paint Hebrew/Arabic words as a
 270          * single string, the letters in the words would get reversed
 271          * again. In order to avoid that, we reverse the string in advance.
 272          * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 273          * for an earlier thread on the subject
 274          */
 275         if (rtl)
 276                 reverse(s.begin(), s.end());
 277
 278         if (s[0] == '\t')
 279                 s.replace(0,1,from_ascii("    "));
 280
 281         if (!selection && !change_running.changed()) {
 282                 x_ += pi_.pain.text(int(x_), yo_, s, font.fontInfo());
 283                 return;
 284         }
 285
 286         FontInfo copy = font.fontInfo();
 287         if (change_running.changed())
 288                 copy.setPaintColor(change_running.color());
 289         else if (selection)
 290                 copy.setPaintColor(Color_selectiontext);
 291
 292         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 293 }
 294
 295
 296 void RowPainter::paintSeparator(double orig_x, double width,
 297         FontInfo const & font)
 298 {
 299         pi_.pain.textDecoration(font, int(orig_x), yo_, int(width));
 300         x_ += width;
 301 }
 302
 303
 304 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 305                 int desc)
 306 {
 307         if (!lyxrc.mark_foreign_language)
 308                 return;
 309         if (lang == latex_language)
 310                 return;
 311         if (lang == pi_.base.bv->buffer().params().language)
 312                 return;
 313
 314         int const y = yo_ + solid_line_offset_ + desc + int(solid_line_thickness_/2);
 315         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language,
 316                 Painter::line_solid, solid_line_thickness_);
 317 }
 318
 319
 320 void RowPainter::paintMisspelledMark(double orig_x, bool changed)
 321 {
 322         // if changed the misspelled marker gets placed slightly lower than normal
 323         // to avoid drawing at the same vertical offset
 324         float const y = yo_ + solid_line_offset_ + solid_line_thickness_
 325                 + (changed ? solid_line_thickness_ + 1 : 0)
 326                 + dotted_line_offset_;
 327         pi_.pain.line(int(orig_x), int(y), int(x_), int(y), Color_error,
 328                 Painter::line_onoffdash, dotted_line_thickness_);
 329 }
 330
 331
 332 void RowPainter::paintFromPos(pos_type & vpos, bool changed)
 333 {
 334         pos_type const pos = bidi_.vis2log(vpos);
 335         Font const font = text_metrics_.displayFont(pit_, pos);
 336         double const orig_x = x_;
 337
 338         paintChars(vpos, font);
 339         paintForeignMark(orig_x, font.language());
 340
 341         // Paint the spelling mark if needed.
 342         if (lyxrc.spellcheck_continuously && par_.isMisspelled(pos)) {
 343                 // check for cursor position
 344                 // don't draw misspelled marker for words at cursor position
 345                 // we don't want to disturb the process of text editing
 346                 BufferView const * bv = pi_.base.bv;
 347                 DocIterator const nw = bv->cursor().newWord();
 348                 bool new_word = false;
 349                 if (!nw.empty() && par_.id() == nw.paragraph().id()) {
 350                         pos_type cpos = nw.pos();
 351                         if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
 352                                 --cpos;
 353                         else if (cpos > 0 && par_.isWordSeparator(cpos))
 354                                 --cpos;
 355                         new_word = par_.isSameSpellRange(pos, cpos) ;
 356                 }
 357                 if (!new_word)
 358                         paintMisspelledMark(orig_x, changed);
 359         }
 360 }
 361
 362
 363 void RowPainter::paintChangeBar()
 364 {
 365         pos_type const start = row_.pos();
 366         pos_type end = row_.endpos();
 367
 368         if (par_.size() == end) {
 369                 // this is the last row of the paragraph;
 370                 // thus, we must also consider the imaginary end-of-par character
 371                 end++;
 372         }
 373
 374         if (start == end || !par_.isChanged(start, end))
 375                 return;
 376
 377         int const height = text_metrics_.isLastRow(pit_, row_)
 378                 ? row_.ascent()
 379                 : row_.height();
 380
 381         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 382 }
 383
 384
 385 void RowPainter::paintAppendix()
 386 {
 387         // only draw the appendix frame once (for the main text)
 388         if (!par_.params().appendix() || !text_.isMainText())
 389                 return;
 390
 391         int y = yo_ - row_.ascent();
 392
 393         if (par_.params().startOfAppendix())
 394                 y += 2 * defaultRowHeight();
 395
 396         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 397         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 398 }
 399
 400
 401 void RowPainter::paintDepthBar()
 402 {
 403         depth_type const depth = par_.getDepth();
 404
 405         if (depth <= 0)
 406                 return;
 407
 408         depth_type prev_depth = 0;
 409         if (!text_metrics_.isFirstRow(pit_, row_)) {
 410                 pit_type pit2 = pit_;
 411                 if (row_.pos() == 0)
 412                         --pit2;
 413                 prev_depth = pars_[pit2].getDepth();
 414         }
 415
 416         depth_type next_depth = 0;
 417         if (!text_metrics_.isLastRow(pit_, row_)) {
 418                 pit_type pit2 = pit_;
 419                 if (row_.endpos() >= pars_[pit2].size())
 420                         ++pit2;
 421                 next_depth = pars_[pit2].getDepth();
 422         }
 423
 424         for (depth_type i = 1; i <= depth; ++i) {
 425                 int const w = nestMargin() / 5;
 426                 int x = int(xo_) + w * i;
 427                 // only consider the changebar space if we're drawing outermost text
 428                 if (text_.isMainText())
 429                         x += changebarMargin();
 430
 431                 int const starty = yo_ - row_.ascent();
 432                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 433
 434                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 435
 436                 if (i > prev_depth)
 437                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 438                 if (i > next_depth)
 439                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 440         }
 441 }
 442
 443
 444 int RowPainter::paintAppendixStart(int y)
 445 {
 446         FontInfo pb_font = sane_font;
 447         pb_font.setColor(Color_appendix);
 448         pb_font.decSize();
 449
 450         int w = 0;
 451         int a = 0;
 452         int d = 0;
 453
 454         docstring const label = _("Appendix");
 455         theFontMetrics(pb_font).rectText(label, w, a, d);
 456
 457         int const text_start = int(xo_ + (width_ - w) / 2);
 458         int const text_end = text_start + w;
 459
 460         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 461
 462         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 463         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 464
 465         return 3 * defaultRowHeight();
 466 }
 467
 468
 469 void RowPainter::paintFirst()
 470 {
 471         BufferParams const & bparams = pi_.base.bv->buffer().params();
 472         Layout const & layout = par_.layout();
 473
 474         int y_top = 0;
 475
 476         // start of appendix?
 477         if (par_.params().startOfAppendix())
 478                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 479
 480         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 481                 && pit_ != 0) {
 482                 if (layout.latextype == LATEX_PARAGRAPH
 483                     && !par_.getDepth()) {
 484                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 485                 } else {
 486                         Layout const & playout = pars_[pit_ - 1].layout();
 487                         if (playout.latextype == LATEX_PARAGRAPH
 488                             && !pars_[pit_ - 1].getDepth()) {
 489                                 // is it right to use defskip here, too? (AS)
 490                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 491                         }
 492                 }
 493         }
 494
 495         bool const is_first =
 496                 text_.isFirstInSequence(pit_) || !layout.isParagraphGroup();
 497         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 498
 499         if (layout.labelIsInline()
 500                         && (layout.labeltype != LABEL_STATIC || is_first)) {
 501                 paintLabel();
 502         } else if (is_first && layout.labelIsAbove()) {
 503                 paintTopLevelLabel();
 504         }
 505 }
 506
 507
 508 void RowPainter::paintLabel()
 509 {
 510         docstring const str = par_.labelString();
 511         if (str.empty())
 512                 return;
 513
 514         bool const is_rtl = text_.isRTL(par_);
 515         Layout const & layout = par_.layout();
 516         FontInfo const font = labelFont();
 517         FontMetrics const & fm = theFontMetrics(font);
 518         double x = x_;
 519
 520         if (is_rtl) {
 521                 x = width_ - leftMargin()
 522                         + fm.width(layout.labelsep);
 523         } else {
 524                 x = x_ - fm.width(layout.labelsep)
 525                         - fm.width(str);
 526         }
 527
 528         pi_.pain.text(int(x), yo_, str, font);
 529 }
 530
 531
 532 void RowPainter::paintTopLevelLabel()
 533 {
 534         BufferParams const & bparams = pi_.base.bv->buffer().params();
 535         bool const is_rtl = text_.isRTL(par_);
 536         ParagraphParameters const & pparams = par_.params();
 537         Layout const & layout = par_.layout();
 538         FontInfo const font = labelFont();
 539         docstring const str = par_.labelString();
 540         if (str.empty())
 541                 return;
 542
 543         double spacing_val = 1.0;
 544         if (!pparams.spacing().isDefault())
 545                 spacing_val = pparams.spacing().getValue();
 546         else
 547                 spacing_val = bparams.spacing().getValue();
 548
 549         FontMetrics const & fm = theFontMetrics(font);
 550
 551         int const labeladdon = int(fm.maxHeight()
 552                 * layout.spacing.getValue() * spacing_val);
 553
 554         int maxdesc =
 555                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 556                 + (layout.labelbottomsep * defaultRowHeight()));
 557
 558         double x = x_;
 559         if (layout.labeltype == LABEL_CENTERED) {
 560                 if (is_rtl)
 561                         x = leftMargin();
 562                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 563                 x -= fm.width(str) / 2;
 564         } else if (is_rtl) {
 565                 x = width_ - leftMargin() -     fm.width(str);
 566         }
 567         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 568 }
 569
 570
 571 /** Check if the current paragraph is the last paragraph in a
 572     proof environment */
 573 static int getEndLabel(pit_type p, Text const & text)
 574 {
 575         ParagraphList const & pars = text.paragraphs();
 576         pit_type pit = p;
 577         depth_type par_depth = pars[p].getDepth();
 578         while (pit != pit_type(pars.size())) {
 579                 Layout const & layout = pars[pit].layout();
 580                 int const endlabeltype = layout.endlabeltype;
 581
 582                 if (endlabeltype != END_LABEL_NO_LABEL) {
 583                         if (p + 1 == pit_type(pars.size()))
 584                                 return endlabeltype;
 585
 586                         depth_type const next_depth =
 587                                 pars[p + 1].getDepth();
 588                         if (par_depth > next_depth ||
 589                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 590                                 return endlabeltype;
 591                         break;
 592                 }
 593                 if (par_depth == 0)
 594                         break;
 595                 pit = text.outerHook(pit);
 596                 if (pit != pit_type(pars.size()))
 597                         par_depth = pars[pit].getDepth();
 598         }
 599         return END_LABEL_NO_LABEL;
 600 }
 601
 602
 603 void RowPainter::paintLast()
 604 {
 605         bool const is_rtl = text_.isRTL(par_);
 606         int const endlabel = getEndLabel(pit_, text_);
 607
 608         // paint imaginary end-of-paragraph character
 609
 610         Change const & change = par_.lookupChange(par_.size());
 611         if (change.changed()) {
 612                 FontMetrics const & fm =
 613                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 614                 int const length = fm.maxAscent() / 2;
 615                 Color col = change.color();
 616
 617                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 618                            Painter::line_solid, 3);
 619
 620                 if (change.deleted()) {
 621                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 622                                 yo_ + 2, col, Painter::line_solid, 3);
 623                 } else {
 624                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 625                                 yo_ + 2, col, Painter::line_solid, 3);
 626                 }
 627         }
 628
 629         // draw an endlabel
 630
 631         switch (endlabel) {
 632         case END_LABEL_BOX:
 633         case END_LABEL_FILLED_BOX: {
 634                 FontInfo const font = labelFont();
 635                 FontMetrics const & fm = theFontMetrics(font);
 636                 int const size = int(0.75 * fm.maxAscent());
 637                 int const y = yo_ - size;
 638                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 639                 int x = is_rtl ? nestMargin() + changebarMargin()
 640                         : max_row_width - text_metrics_.rightMargin(pm_);
 641
 642                 // If needed, move the box a bit to avoid overlapping with text.
 643                 int const rem = max_row_width - row_.width();
 644                 if (rem <= 0)
 645                         x += is_rtl ? rem : - rem;
 646
 647                 if (endlabel == END_LABEL_BOX)
 648                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 649                 else
 650                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 651                 break;
 652         }
 653
 654         case END_LABEL_STATIC: {
 655                 FontInfo const font = labelFont();
 656                 FontMetrics const & fm = theFontMetrics(font);
 657                 docstring const & str = par_.layout().endlabelstring();
 658                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 659                 pi_.pain.text(int(x), yo_, str, font);
 660                 break;
 661         }
 662
 663         case END_LABEL_NO_LABEL:
 664                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 665                         docstring const s = docstring(1, char_type(0x00B6));
 666                         FontInfo f = FontInfo(text_.layoutFont(pit_));
 667                         f.setColor(Color_paragraphmarker);
 668                         pi_.pain.text(int(x_), yo_, s, f);
 669                         x_ += theFontMetrics(f).width(s);
 670                 }
 671                 break;
 672         }
 673 }
 674
 675
 676 void RowPainter::paintOnlyInsets()
 677 {
 678         CoordCache const & cache = pi_.base.bv->coordCache();
 679         pos_type const end = row_.endpos();
 680         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 681                 // If outer row has changed, nested insets are repaint completely.
 682                 Inset const * inset = par_.getInset(pos);
 683                 bool const nested_inset = inset &&
 684                                 ((inset->asInsetMath() &&
 685                                   !inset->asInsetMath()->asMacroTemplate())
 686                                  || inset->asInsetText()
 687                                  || inset->asInsetTabular());
 688                 if (!nested_inset)
 689                         continue;
 690                 if (x_ > pi_.base.bv->workWidth()
 691                     || !cache.getInsets().has(inset))
 692                         continue;
 693                 x_ = cache.getInsets().x(inset);
 694
 695                 bool const pi_selected = pi_.selected;
 696                 Cursor const & cur = pi_.base.bv->cursor();
 697                 if (cur.selection() && cur.text() == &text_
 698                           && cur.normalAnchor().text() == &text_)
 699                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 700                 paintInset(inset, pos);
 701                 pi_.selected = pi_selected;
 702         }
 703 }
 704
 705
 706 void RowPainter::paintText()
 707 {
 708         pos_type const end = row_.endpos();
 709         // Spaces at logical line breaks in bidi text must be skipped during
 710         // painting. However, they may appear visually in the middle
 711         // of a row; they must be skipped, wherever they are...
 712         // * logically "abc_[HEBREW_\nHEBREW]"
 713         // * visually "abc_[_WERBEH\nWERBEH]"
 714         pos_type skipped_sep_vpos = -1;
 715         pos_type body_pos = par_.beginOfBody();
 716         if (body_pos > 0 &&
 717                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 718                 body_pos = 0;
 719         }
 720
 721         Layout const & layout = par_.layout();
 722
 723         Change change_running;
 724         int change_last_x = 0;
 725
 726         // check for possible inline completion
 727         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 728         pos_type inlineCompletionVPos = -1;
 729         if (inlineCompletionPos.inTexted()
 730             && inlineCompletionPos.text() == &text_
 731             && inlineCompletionPos.pit() == pit_
 732             && inlineCompletionPos.pos() - 1 >= row_.pos()
 733             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 734                 // draw logically behind the previous character
 735                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 736         }
 737
 738         // Use font span to speed things up, see below
 739         FontSpan font_span;
 740         Font font;
 741
 742         // If the last logical character is a separator, don't paint it, unless
 743         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 744         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 745                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 746
 747         for (pos_type vpos = row_.pos(); vpos < end; ) {
 748                 if (x_ > pi_.base.bv->workWidth())
 749                         break;
 750
 751                 // Skip the separator at the logical end of the row
 752                 if (vpos == skipped_sep_vpos) {
 753                         ++vpos;
 754                         continue;
 755                 }
 756
 757                 pos_type const pos = bidi_.vis2log(vpos);
 758
 759                 if (pos >= par_.size()) {
 760                         ++vpos;
 761                         continue;
 762                 }
 763
 764                 // Use font span to speed things up, see above
 765                 if (vpos < font_span.first || vpos > font_span.last) {
 766                         font_span = par_.fontSpan(vpos);
 767                         font = text_metrics_.displayFont(pit_, vpos);
 768
 769                         // split font span if inline completion is inside
 770                         if (font_span.first <= inlineCompletionVPos
 771                             && font_span.last > inlineCompletionVPos)
 772                                 font_span.last = inlineCompletionVPos;
 773                 }
 774
 775                 const int width_pos = pm_.singleWidth(pos, font);
 776
 777                 if (x_ + width_pos < 0) {
 778                         x_ += width_pos;
 779                         ++vpos;
 780                         continue;
 781                 }
 782                 Change const & change = par_.lookupChange(pos);
 783                 if (change.changed() && !change_running.changed()) {
 784                         change_running = change;
 785                         change_last_x = int(x_);
 786                 }
 787
 788                 Inset const * inset = par_.getInset(pos);
 789                 bool const highly_editable_inset = inset
 790                         && inset->editable();
 791
 792                 // If we reach the end of a change or if the author changes, paint it.
 793                 // We also don't paint across things like tables
 794                 if (change_running.changed() && (highly_editable_inset
 795                         || !change.changed() || !change_running.isSimilarTo(change))) {
 796                         // Calculate 1/3 height of the buffer's default font
 797                         FontMetrics const & fm
 798                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 799                         float const y_bar = change_running.deleted() ?
 800                                 yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 801                         pi_.pain.line(change_last_x, int(y_bar), int(x_), int(y_bar),
 802                                 change_running.color(), Painter::line_solid, solid_line_thickness_);
 803
 804                         // Change might continue with a different author or type
 805                         if (change.changed() && !highly_editable_inset) {
 806                                 change_running = change;
 807                                 change_last_x = int(x_);
 808                         } else
 809                                 change_running.setUnchanged();
 810                 }
 811
 812                 if (body_pos > 0 && pos == body_pos - 1) {
 813                         int const lwidth = theFontMetrics(labelFont())
 814                                 .width(layout.labelsep);
 815
 816                         x_ += row_.label_hfill + lwidth - width_pos;
 817                 }
 818
 819                 // Is the inline completion in front of character?
 820                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 821                         paintInlineCompletion(font);
 822
 823                 if (par_.isSeparator(pos)) {
 824                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 825                         double const orig_x = x_;
 826                         double separator_width = width_pos;
 827                         if (pos >= body_pos)
 828                                 separator_width += row_.separator;
 829                         paintSeparator(orig_x, separator_width, orig_font.fontInfo());
 830                         paintForeignMark(orig_x, orig_font.language());
 831                         ++vpos;
 832
 833                 } else if (inset) {
 834                         // If outer row has changed, nested insets are repaint completely.
 835                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 836
 837                         bool const pi_selected = pi_.selected;
 838                         Cursor const & cur = pi_.base.bv->cursor();
 839                         if (cur.selection() && cur.text() == &text_
 840                                   && cur.normalAnchor().text() == &text_)
 841                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 842                         paintInset(inset, pos);
 843                         pi_.selected = pi_selected;
 844                         ++vpos;
 845
 846                 } else {
 847                         // paint as many characters as possible.
 848                         paintFromPos(vpos, change_running.changed());
 849                 }
 850
 851                 // Is the inline completion after character?
 852                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 853                         paintInlineCompletion(font);
 854         }
 855
 856         // if we reach the end of a struck out range, paint it
 857         if (change_running.changed()) {
 858                 FontMetrics const & fm
 859                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 860                 float const y_bar = change_running.deleted() ?
 861                                 yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 862                 pi_.pain.line(change_last_x, int(y_bar), int(x_), int(y_bar),
 863                         change_running.color(), Painter::line_solid, solid_line_thickness_);
 864                 change_running.setUnchanged();
 865         }
 866 }
 867
 868
 869 void RowPainter::paintSelection()
 870 {
 871         if (!row_.selection())
 872                 return;
 873         Cursor const & curs = pi_.base.bv->cursor();
 874         DocIterator beg = curs.selectionBegin();
 875         beg.pit() = pit_;
 876         beg.pos() = row_.sel_beg;
 877
 878         DocIterator end = curs.selectionEnd();
 879         end.pit() = pit_;
 880         end.pos() = row_.sel_end;
 881
 882         bool const begin_boundary = beg.pos() >= row_.endpos();
 883         bool const end_boundary = row_.sel_end == row_.endpos();
 884
 885         DocIterator cur = beg;
 886         cur.boundary(begin_boundary);
 887         int x1 = text_metrics_.cursorX(beg.top(), begin_boundary);
 888         int x2 = text_metrics_.cursorX(end.top(), end_boundary);
 889         int const y1 = yo_ - row_.ascent();
 890         int const y2 = y1 + row_.height();
 891
 892         int const rm = text_.isMainText() ? pi_.base.bv->rightMargin() : 0;
 893         int const lm = text_.isMainText() ? pi_.base.bv->leftMargin() : 0;
 894
 895         // draw the margins
 896         if (row_.begin_margin_sel) {
 897                 if (text_.isRTL(beg.paragraph())) {
 898                         pi_.pain.fillRectangle(int(xo_ + x1), y1,
 899                                 text_metrics_.width() - rm - x1, y2 - y1, Color_selection);
 900                 } else {
 901                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x1 - lm, y2 - y1,
 902                                 Color_selection);
 903                 }
 904         }
 905
 906         if (row_.end_margin_sel) {
 907                 if (text_.isRTL(beg.paragraph())) {
 908                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x2 - lm, y2 - y1,
 909                                 Color_selection);
 910                 } else {
 911                         pi_.pain.fillRectangle(int(xo_ + x2), y1, text_metrics_.width() - rm - x2,
 912                                 y2 - y1, Color_selection);
 913                 }
 914         }
 915
 916         // if we are on a boundary from the beginning, it's probably
 917         // a RTL boundary and we jump to the other side directly as this
 918         // segement is 0-size and confuses the logic below
 919         if (cur.boundary())
 920                 cur.boundary(false);
 921
 922         // go through row and draw from RTL boundary to RTL boundary
 923         while (cur < end) {
 924                 bool draw_now = false;
 925
 926                 // simplified cursorForward code below which does not
 927                 // descend into insets and which does not go into the
 928                 // next line. Compare the logic with the original cursorForward
 929
 930                 // if left of boundary -> just jump to right side, but
 931                 // for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
 932                 if (cur.boundary()) {
 933                         cur.boundary(false);
 934                 }       else if (text_metrics_.isRTLBoundary(cur.pit(), cur.pos() + 1)) {
 935                         // in front of RTL boundary -> Stay on this side of the boundary
 936                         // because:  ab|cDDEEFFghi -> abc|DDEEFFghi
 937                         ++cur.pos();
 938                         cur.boundary(true);
 939                         draw_now = true;
 940                 } else {
 941                         // move right
 942                         ++cur.pos();
 943
 944                         // line end?
 945                         if (cur.pos() == row_.endpos())
 946                                 cur.boundary(true);
 947                 }
 948
 949                 if (x1 == -1) {
 950                         // the previous segment was just drawn, now the next starts
 951                         x1 = text_metrics_.cursorX(cur.top(), cur.boundary());
 952                 }
 953
 954                 if (!(cur < end) || draw_now) {
 955                         x2 = text_metrics_.cursorX(cur.top(), cur.boundary());
 956                         pi_.pain.fillRectangle(int(xo_ + min(x1, x2)), y1, abs(x2 - x1),
 957                                 y2 - y1, Color_selection);
 958
 959                         // reset x1, so it is set again next round (which will be on the
 960                         // right side of a boundary or at the selection end)
 961                         x1 = -1;
 962                 }
 963         }
 964 }
 965
 966
 967 void RowPainter::paintInlineCompletion(Font const & font)
 968 {
 969         docstring completion = pi_.base.bv->inlineCompletion();
 970         FontInfo f = font.fontInfo();
 971         bool rtl = font.isRightToLeft();
 972
 973         // draw the unique and the non-unique completion part
 974         // Note: this is not time-critical as it is
 975         // only done once per screen.
 976         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 977         docstring s1 = completion.substr(0, uniqueTo);
 978         docstring s2 = completion.substr(uniqueTo);
 979         ColorCode c1 = Color_inlinecompletion;
 980         ColorCode c2 = Color_nonunique_inlinecompletion;
 981
 982         // right to left?
 983         if (rtl) {
 984                 swap(s1, s2);
 985                 swap(c1, c2);
 986         }
 987
 988         if (!s1.empty()) {
 989                 f.setColor(c1);
 990                 pi_.pain.text(int(x_), yo_, s1, f);
 991                 x_ += theFontMetrics(font).width(s1);
 992         }
 993
 994         if (!s2.empty()) {
 995                 f.setColor(c2);
 996                 pi_.pain.text(int(x_), yo_, s2, f);
 997                 x_ += theFontMetrics(font).width(s2);
 998         }
 999 }
1000
1001 } // namespace lyx