src/rowpainter.cpp

   1 /**
   2  * \file rowpainter.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author various
   7  * \author John Levon
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13 #include <algorithm>
  14
  15 #include "rowpainter.h"
  16
  17 #include "Bidi.h"
  18 #include "Buffer.h"
  19 #include "CoordCache.h"
  20 #include "Cursor.h"
  21 #include "BufferParams.h"
  22 #include "BufferView.h"
  23 #include "Changes.h"
  24 #include "Encoding.h"
  25 #include "Language.h"
  26 #include "Layout.h"
  27 #include "LyXRC.h"
  28 #include "Row.h"
  29 #include "MetricsInfo.h"
  30 #include "Paragraph.h"
  31 #include "ParagraphMetrics.h"
  32 #include "ParagraphParameters.h"
  33 #include "TextMetrics.h"
  34 #include "VSpace.h"
  35
  36 #include "frontends/FontMetrics.h"
  37 #include "frontends/Painter.h"
  38
  39 #include "insets/InsetText.h"
  40
  41 #include "support/debug.h"
  42 #include "support/gettext.h"
  43 #include "support/textutils.h"
  44
  45 #include "support/lassert.h"
  46 #include <boost/crc.hpp>
  47
  48 using namespace std;
  49
  50 namespace lyx {
  51
  52 using frontend::Painter;
  53 using frontend::FontMetrics;
  54
  55 RowPainter::RowPainter(PainterInfo & pi,
  56         Text const & text, pit_type pit, Row const & row, Bidi & bidi, int x, int y)
  57         : pi_(pi), text_(text),
  58           text_metrics_(pi_.base.bv->textMetrics(&text)),
  59           pars_(text.paragraphs()),
  60           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  61           pm_(text_metrics_.parMetrics(pit)),
  62           bidi_(bidi), change_(pi_.change_),
  63           xo_(x), yo_(y), width_(text_metrics_.width())
  64 {
  65         bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
  66         x_ = row_.x + xo_;
  67
  68         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  69         //row_.dump();
  70
  71         LASSERT(pit >= 0, /**/);
  72         LASSERT(pit < int(text.paragraphs().size()), /**/);
  73 }
  74
  75
  76 FontInfo RowPainter::labelFont() const
  77 {
  78         FontInfo f = text_.labelFont(par_);
  79         // selected text?
  80         if (row_.begin_margin_sel || pi_.selected)
  81                 f.setPaintColor(Color_selectiontext);
  82         return f;
  83 }
  84
  85
  86 int RowPainter::leftMargin() const
  87 {
  88         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
  89                 row_.pos());
  90 }
  91
  92 // If you want to debug inset metrics uncomment the following line:
  93 //#define DEBUG_METRICS
  94 // This draws green lines around each inset.
  95
  96
  97 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
  98 {
  99         Font const font = text_metrics_.displayFont(pit_, pos);
 100
 101         LASSERT(inset, return);
 102         // Backup full_repaint status because some insets (InsetTabular)
 103         // requires a full repaint
 104         bool pi_full_repaint = pi_.full_repaint;
 105
 106         // FIXME: We should always use font, see documentation of
 107         // noFontChange() in Inset.h.
 108         pi_.base.font = inset->noFontChange() ?
 109                 pi_.base.bv->buffer().params().getFont().fontInfo() :
 110                 font.fontInfo();
 111         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 112         pi_.change_ = change_.changed() ? change_ : par_.lookupChange(pos);
 113
 114         int const x1 = int(x_);
 115         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 116         // insets are painted completely. Recursive
 117         inset->drawBackground(pi_, x1, yo_);
 118         inset->drawSelection(pi_, x1, yo_);
 119         inset->draw(pi_, x1, yo_);
 120
 121         Dimension const & dim = pm_.insetDimension(inset);
 122
 123         paintForeignMark(x_, font.language(), dim.descent());
 124
 125         x_ += dim.width();
 126
 127         // Restore full_repaint status.
 128         pi_.full_repaint = pi_full_repaint;
 129
 130 #ifdef DEBUG_METRICS
 131         int const x2 = x1 + dim.wid;
 132         int const y1 = yo_ + dim.des;
 133         int const y2 = yo_ - dim.asc;
 134         pi_.pain.line(x1, y1, x1, y2, Color_green);
 135         pi_.pain.line(x1, y1, x2, y1, Color_green);
 136         pi_.pain.line(x2, y1, x2, y2, Color_green);
 137         pi_.pain.line(x1, y2, x2, y2, Color_green);
 138 #endif
 139 }
 140
 141
 142 void RowPainter::paintHebrewComposeChar(pos_type & vpos, FontInfo const & font)
 143 {
 144         pos_type pos = bidi_.vis2log(vpos);
 145
 146         docstring str;
 147
 148         // first char
 149         char_type c = par_.getChar(pos);
 150         str += c;
 151         ++vpos;
 152
 153         int const width = theFontMetrics(font).width(c);
 154         int dx = 0;
 155
 156         for (pos_type i = pos - 1; i >= 0; --i) {
 157                 c = par_.getChar(i);
 158                 if (!Encodings::isHebrewComposeChar(c)) {
 159                         if (isPrintableNonspace(c)) {
 160                                 int const width2 = pm_.singleWidth(i,
 161                                         text_metrics_.displayFont(pit_, i));
 162                                 dx = (c == 0x05e8 || // resh
 163                                       c == 0x05d3)   // dalet
 164                                         ? width2 - width
 165                                         : (width2 - width) / 2;
 166                         }
 167                         break;
 168                 }
 169         }
 170
 171         // Draw nikud
 172         pi_.pain.text(int(x_) + dx, yo_, str, font);
 173 }
 174
 175
 176 void RowPainter::paintArabicComposeChar(pos_type & vpos, FontInfo const & font)
 177 {
 178         pos_type pos = bidi_.vis2log(vpos);
 179         docstring str;
 180
 181         // first char
 182         char_type c = par_.getChar(pos);
 183         c = par_.transformChar(c, pos);
 184         str += c;
 185         ++vpos;
 186
 187         int const width = theFontMetrics(font).width(c);
 188         int dx = 0;
 189
 190         for (pos_type i = pos - 1; i >= 0; --i) {
 191                 c = par_.getChar(i);
 192                 if (!Encodings::isArabicComposeChar(c)) {
 193                         if (isPrintableNonspace(c)) {
 194                                 int const width2 = pm_.singleWidth(i,
 195                                                 text_metrics_.displayFont(pit_, i));
 196                                 dx = (width2 - width) / 2;
 197                         }
 198                         break;
 199                 }
 200         }
 201         // Draw nikud
 202         pi_.pain.text(int(x_) + dx, yo_, str, font);
 203 }
 204
 205
 206 void RowPainter::paintChars(pos_type & vpos, FontInfo const & font,
 207                             bool hebrew, bool arabic)
 208 {
 209         // This method takes up 70% of time when typing
 210         pos_type pos = bidi_.vis2log(vpos);
 211         // first character
 212         vector<char_type> str;
 213         str.reserve(100);
 214         str.push_back(par_.getChar(pos));
 215
 216         if (arabic) {
 217                 char_type c = str[0];
 218                 if (c == '(')
 219                         c = ')';
 220                 else if (c == ')')
 221                         c = '(';
 222                 str[0] = par_.transformChar(c, pos);
 223         }
 224
 225         pos_type const end = row_.endpos();
 226         FontSpan const font_span = par_.fontSpan(pos);
 227         // Track-change status.
 228         Change const & change_running = par_.lookupChange(pos);
 229
 230         // selected text?
 231         bool const selection = (pos >= row_.sel_beg && pos < row_.sel_end)
 232                 || pi_.selected;
 233
 234         // spelling correct?
 235         bool const spell_state =
 236                 lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 237
 238         char_type prev_char = ' ';
 239         // collect as much similar chars as we can
 240         for (++vpos ; vpos < end ; ++vpos) {
 241                 pos = bidi_.vis2log(vpos);
 242                 if (pos < font_span.first || pos > font_span.last)
 243                         break;
 244
 245                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 246                 if (new_selection != selection)
 247                         // Selection ends or starts here.
 248                         break;
 249
 250                 bool const new_spell_state =
 251                         lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 252                 if (new_spell_state != spell_state)
 253                         // Spell checker state changed here.
 254                         break;
 255
 256                 Change const & change = par_.lookupChange(pos);
 257                 if (!change_running.isSimilarTo(change))
 258                         // Track change type or author has changed.
 259                         break;
 260
 261                 char_type c = par_.getChar(pos);
 262
 263                 if (c == '\t' || prev_char == '\t') {
 264                         prev_char = c;
 265                         break;
 266                 }
 267
 268                 if (!isPrintableNonspace(c))
 269                         break;
 270
 271                 // Work-around bug #6920
 272                 // The bug can be reproduced with DejaVu font under Linux.
 273                 // The issue is that we compute the metrics character by character
 274                 // in ParagraphMetrics::singleWidth(); but we paint word by word
 275                 // for performance reason.
 276                 // Maybe a more general fix would be draw character by character
 277                 // for some predefined fonts on some patform. In arabic and
 278                 // Hebrew we already do paint this way.
 279                 if (prev_char == 'f')
 280                         break;
 281
 282                 /* Because we do our own bidi, at this point the strings are
 283                  * already in visual order. However, Qt also applies its own
 284                  * bidi algorithm to strings that it paints to the screen.
 285                  * Therefore, if we were to paint Hebrew/Arabic words as a
 286                  * single string, the letters in the words would get reversed
 287                  * again. In order to avoid that, we don't collect Hebrew/
 288                  * Arabic characters, but rather paint them one at a time.
 289                  * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 290                  */
 291                 if (hebrew)
 292                         break;
 293
 294                 /* FIXME: these checks are irrelevant, since 'arabic' and
 295                  * 'hebrew' alone are already going to trigger a break.
 296                  * However, this should not be removed completely, because
 297                  * if an alternative solution is found which allows grouping
 298                  * of arabic and hebrew characters, then these breaks may have
 299                  * to be re-applied.
 300
 301                 if (arabic && Encodings::isArabicComposeChar(c))
 302                         break;
 303
 304                 if (hebrew && Encodings::isHebrewComposeChar(c))
 305                         break;
 306                 */
 307
 308                 if (arabic) {
 309                         if (c == '(')
 310                                 c = ')';
 311                         else if (c == ')')
 312                                 c = '(';
 313                         c = par_.transformChar(c, pos);
 314                         /* see comment in hebrew, explaining why we break */
 315                         break;
 316                 }
 317
 318                 str.push_back(c);
 319         }
 320
 321         docstring s(&str[0], str.size());
 322
 323         if (s[0] == '\t')
 324                 s.replace(0,1,from_ascii("    "));
 325
 326         if (!selection && !change_running.changed()) {
 327                 x_ += pi_.pain.text(int(x_), yo_, s, font);
 328                 return;
 329         }
 330
 331         FontInfo copy = font;
 332         if (change_running.changed())
 333                 copy.setPaintColor(change_running.color());
 334         else if (selection)
 335                 copy.setPaintColor(Color_selectiontext);
 336
 337         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 338 }
 339
 340
 341 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 342                 int desc)
 343 {
 344         if (!lyxrc.mark_foreign_language)
 345                 return;
 346         if (lang == latex_language)
 347                 return;
 348         if (lang == pi_.base.bv->buffer().params().language)
 349                 return;
 350
 351         int const y = yo_ + 1 + desc;
 352         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language);
 353 }
 354
 355
 356 void RowPainter::paintMisspelledMark(double orig_x, int desc, bool changed)
 357 {
 358         // derive the offset from zoom factor specified by user in percent
 359         // if changed the misspelled marker gets placed slightly lower than normal
 360         // to avoid drawing at the same vertical offset
 361         int const offset = int(1.5 * lyxrc.zoom / 100.0); // [percent]
 362         int const y = yo_ + desc + (changed ? offset : 0);
 363         pi_.pain.line(int(orig_x), y, int(x_), y, Color_red, Painter::line_onoffdash, 1.0);
 364 }
 365
 366
 367 void RowPainter::paintFromPos(pos_type & vpos, bool changed)
 368 {
 369         pos_type const pos = bidi_.vis2log(vpos);
 370         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 371         double const orig_x = x_;
 372
 373         // usual characters, no insets
 374         char_type const c = par_.getChar(pos);
 375
 376         // special case languages
 377         string const & lang = orig_font.language()->lang();
 378         bool const hebrew = lang == "hebrew";
 379         bool const arabic = lang == "arabic_arabtex" || lang == "arabic_arabi" ||
 380                                                 lang == "farsi";
 381
 382         // spelling correct?
 383         bool const misspelled_ =
 384                 lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 385
 386         // draw as many chars as we can
 387         if ((!hebrew && !arabic)
 388                 || (hebrew && !Encodings::isHebrewComposeChar(c))
 389                 || (arabic && !Encodings::isArabicComposeChar(c))) {
 390                 paintChars(vpos, orig_font.fontInfo(), hebrew, arabic);
 391         } else if (hebrew) {
 392                 paintHebrewComposeChar(vpos, orig_font.fontInfo());
 393         } else if (arabic) {
 394                 paintArabicComposeChar(vpos, orig_font.fontInfo());
 395         }
 396
 397         paintForeignMark(orig_x, orig_font.language());
 398
 399         if (lyxrc.spellcheck_continuously && misspelled_) {
 400                 paintMisspelledMark(orig_x, 2, changed);
 401         }
 402 }
 403
 404
 405 void RowPainter::paintChangeBar()
 406 {
 407         pos_type const start = row_.pos();
 408         pos_type end = row_.endpos();
 409
 410         if (par_.size() == end) {
 411                 // this is the last row of the paragraph;
 412                 // thus, we must also consider the imaginary end-of-par character
 413                 end++;
 414         }
 415
 416         if (start == end || !par_.isChanged(start, end))
 417                 return;
 418
 419         int const height = text_metrics_.isLastRow(pit_, row_)
 420                 ? row_.ascent()
 421                 : row_.height();
 422
 423         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 424 }
 425
 426
 427 void RowPainter::paintAppendix()
 428 {
 429         // only draw the appendix frame once (for the main text)
 430         if (!par_.params().appendix() || !text_.isMainText())
 431                 return;
 432
 433         int y = yo_ - row_.ascent();
 434
 435         if (par_.params().startOfAppendix())
 436                 y += 2 * defaultRowHeight();
 437
 438         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 439         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 440 }
 441
 442
 443 void RowPainter::paintDepthBar()
 444 {
 445         depth_type const depth = par_.getDepth();
 446
 447         if (depth <= 0)
 448                 return;
 449
 450         depth_type prev_depth = 0;
 451         if (!text_metrics_.isFirstRow(pit_, row_)) {
 452                 pit_type pit2 = pit_;
 453                 if (row_.pos() == 0)
 454                         --pit2;
 455                 prev_depth = pars_[pit2].getDepth();
 456         }
 457
 458         depth_type next_depth = 0;
 459         if (!text_metrics_.isLastRow(pit_, row_)) {
 460                 pit_type pit2 = pit_;
 461                 if (row_.endpos() >= pars_[pit2].size())
 462                         ++pit2;
 463                 next_depth = pars_[pit2].getDepth();
 464         }
 465
 466         for (depth_type i = 1; i <= depth; ++i) {
 467                 int const w = nestMargin() / 5;
 468                 int x = int(xo_) + w * i;
 469                 // only consider the changebar space if we're drawing outermost text
 470                 if (text_.isMainText())
 471                         x += changebarMargin();
 472
 473                 int const starty = yo_ - row_.ascent();
 474                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 475
 476                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 477
 478                 if (i > prev_depth)
 479                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 480                 if (i > next_depth)
 481                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 482         }
 483 }
 484
 485
 486 int RowPainter::paintAppendixStart(int y)
 487 {
 488         FontInfo pb_font = sane_font;
 489         pb_font.setColor(Color_appendix);
 490         pb_font.decSize();
 491
 492         int w = 0;
 493         int a = 0;
 494         int d = 0;
 495
 496         docstring const label = _("Appendix");
 497         theFontMetrics(pb_font).rectText(label, w, a, d);
 498
 499         int const text_start = int(xo_ + (width_ - w) / 2);
 500         int const text_end = text_start + w;
 501
 502         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 503
 504         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 505         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 506
 507         return 3 * defaultRowHeight();
 508 }
 509
 510
 511 void RowPainter::paintFirst()
 512 {
 513         ParagraphParameters const & pparams = par_.params();
 514         Buffer const & buffer = pi_.base.bv->buffer();
 515         BufferParams const & bparams = buffer.params();
 516         Layout const & layout = par_.layout();
 517
 518         int y_top = 0;
 519
 520         // start of appendix?
 521         if (pparams.startOfAppendix())
 522                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 523
 524         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 525                 && pit_ != 0) {
 526                 if (layout.latextype == LATEX_PARAGRAPH
 527                     && !par_.getDepth()) {
 528                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 529                 } else {
 530                         Layout const & playout = pars_[pit_ - 1].layout();
 531                         if (playout.latextype == LATEX_PARAGRAPH
 532                             && !pars_[pit_ - 1].getDepth()) {
 533                                 // is it right to use defskip here, too? (AS)
 534                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 535                         }
 536                 }
 537         }
 538
 539         bool const is_rtl = text_.isRTL(par_);
 540         bool const is_seq = text_.isFirstInSequence(pit_);
 541         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 542
 543         // should we print a label?
 544         if (layout.labeltype >= LABEL_STATIC
 545             && (layout.labeltype != LABEL_STATIC
 546                       || layout.latextype != LATEX_ENVIRONMENT
 547                       || is_seq)) {
 548
 549                 FontInfo const font = labelFont();
 550                 FontMetrics const & fm = theFontMetrics(font);
 551
 552                 docstring const str = par_.labelString();
 553                 if (!str.empty()) {
 554                         double x = x_;
 555
 556                         // this is special code for the chapter layout. This is
 557                         // printed in an extra row and has a pagebreak at
 558                         // the top.
 559                         if (layout.counter == "chapter") {
 560                                 double spacing_val = 1.0;
 561                                 if (!pparams.spacing().isDefault()) {
 562                                         spacing_val = pparams.spacing().getValue();
 563                                 } else {
 564                                         spacing_val = bparams.spacing().getValue();
 565                                 }
 566
 567                                 int const labeladdon = int(fm.maxHeight() * layout.spacing.getValue() * spacing_val);
 568
 569                                 int const maxdesc = int(fm.maxDescent() * layout.spacing.getValue() * spacing_val)
 570                                         + int(layout.parsep) * defaultRowHeight();
 571
 572                                 if (is_rtl) {
 573                                         x = width_ - leftMargin() -
 574                                                 fm.width(str);
 575                                 }
 576
 577                                 pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 578                         } else {
 579                                 if (is_rtl) {
 580                                         x = width_ - leftMargin()
 581                                                 + fm.width(layout.labelsep);
 582                                 } else {
 583                                         x = x_ - fm.width(layout.labelsep)
 584                                                 - fm.width(str);
 585                                 }
 586
 587                                 pi_.pain.text(int(x), yo_, str, font);
 588                         }
 589                 }
 590
 591         // the labels at the top of an environment.
 592         // More or less for bibliography
 593         } else if (is_seq &&
 594                 (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
 595                 layout.labeltype == LABEL_BIBLIO ||
 596                 layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)) {
 597                 FontInfo const font = labelFont();
 598                 docstring const str = par_.labelString();
 599                 if (!str.empty()) {
 600                         double spacing_val = 1.0;
 601                         if (!pparams.spacing().isDefault())
 602                                 spacing_val = pparams.spacing().getValue();
 603                         else
 604                                 spacing_val = bparams.spacing().getValue();
 605
 606                         FontMetrics const & fm = theFontMetrics(font);
 607
 608                         int const labeladdon = int(fm.maxHeight()
 609                                 * layout.spacing.getValue() * spacing_val);
 610
 611                         int maxdesc =
 612                                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 613                                 + (layout.labelbottomsep * defaultRowHeight()));
 614
 615                         double x = x_;
 616                         if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
 617                                 if (is_rtl)
 618                                         x = leftMargin();
 619                                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 620                                 x -= fm.width(str) / 2;
 621                         } else if (is_rtl) {
 622                                 x = width_ - leftMargin() -     fm.width(str);
 623                         }
 624                         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 625                 }
 626         }
 627 }
 628
 629
 630 /** Check if the current paragraph is the last paragraph in a
 631     proof environment */
 632 static int getEndLabel(pit_type p, Text const & text)
 633 {
 634         ParagraphList const & pars = text.paragraphs();
 635         pit_type pit = p;
 636         depth_type par_depth = pars[p].getDepth();
 637         while (pit != pit_type(pars.size())) {
 638                 Layout const & layout = pars[pit].layout();
 639                 int const endlabeltype = layout.endlabeltype;
 640
 641                 if (endlabeltype != END_LABEL_NO_LABEL) {
 642                         if (p + 1 == pit_type(pars.size()))
 643                                 return endlabeltype;
 644
 645                         depth_type const next_depth =
 646                                 pars[p + 1].getDepth();
 647                         if (par_depth > next_depth ||
 648                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 649                                 return endlabeltype;
 650                         break;
 651                 }
 652                 if (par_depth == 0)
 653                         break;
 654                 pit = text.outerHook(pit);
 655                 if (pit != pit_type(pars.size()))
 656                         par_depth = pars[pit].getDepth();
 657         }
 658         return END_LABEL_NO_LABEL;
 659 }
 660
 661
 662 void RowPainter::paintLast()
 663 {
 664         bool const is_rtl = text_.isRTL(par_);
 665         int const endlabel = getEndLabel(pit_, text_);
 666
 667         // paint imaginary end-of-paragraph character
 668
 669         Change const & change = par_.lookupChange(par_.size());
 670         if (change.changed()) {
 671                 FontMetrics const & fm =
 672                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 673                 int const length = fm.maxAscent() / 2;
 674                 Color col = change.color();
 675
 676                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 677                            Painter::line_solid, 3);
 678
 679                 if (change.deleted()) {
 680                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 681                                 yo_ + 2, col, Painter::line_solid, 3);
 682                 } else {
 683                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 684                                 yo_ + 2, col, Painter::line_solid, 3);
 685                 }
 686         }
 687
 688         // draw an endlabel
 689
 690         switch (endlabel) {
 691         case END_LABEL_BOX:
 692         case END_LABEL_FILLED_BOX: {
 693                 FontInfo const font = labelFont();
 694                 FontMetrics const & fm = theFontMetrics(font);
 695                 int const size = int(0.75 * fm.maxAscent());
 696                 int const y = yo_ - size;
 697                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 698                 int x = is_rtl ? nestMargin() + changebarMargin()
 699                         : max_row_width - text_metrics_.rightMargin(pm_);
 700
 701                 // If needed, move the box a bit to avoid overlapping with text.
 702                 int const rem = max_row_width - row_.width();
 703                 if (rem <= 0)
 704                         x += is_rtl ? rem : - rem;
 705
 706                 if (endlabel == END_LABEL_BOX)
 707                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 708                 else
 709                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 710                 break;
 711         }
 712
 713         case END_LABEL_STATIC: {
 714                 FontInfo const font = labelFont();
 715                 FontMetrics const & fm = theFontMetrics(font);
 716                 docstring const & str = par_.layout().endlabelstring();
 717                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 718                 pi_.pain.text(int(x), yo_, str, font);
 719                 break;
 720         }
 721
 722         case END_LABEL_NO_LABEL:
 723                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 724                         docstring const s = docstring(1, char_type(0x00B6));
 725                         FontInfo f = FontInfo();
 726                         FontMetrics const & fm = theFontMetrics(f);
 727                         f.setColor(Color_paragraphmarker);
 728                         pi_.pain.text(int(x_), yo_, s, f);
 729                         x_ += fm.width(s);
 730                 }
 731                 break;
 732         }
 733 }
 734
 735
 736 void RowPainter::paintOnlyInsets()
 737 {
 738         CoordCache const & cache = pi_.base.bv->coordCache();
 739         pos_type const end = row_.endpos();
 740         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 741                 // If outer row has changed, nested insets are repaint completely.
 742                 Inset const * inset = par_.getInset(pos);
 743                 if (!inset)
 744                         continue;
 745                 if (x_ > pi_.base.bv->workWidth()
 746                     || !cache.getInsets().has(inset))
 747                         continue;
 748                 x_ = cache.getInsets().x(inset);
 749
 750                 bool const pi_selected = pi_.selected;
 751                 Cursor const & cur = pi_.base.bv->cursor();
 752                 if (cur.selection() && cur.text() == &text_
 753                           && cur.normalAnchor().text() == &text_)
 754                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 755                 paintInset(inset, pos);
 756                 pi_.selected = pi_selected;
 757         }
 758 }
 759
 760
 761 void RowPainter::paintText()
 762 {
 763         pos_type const end = row_.endpos();
 764         // Spaces at logical line breaks in bidi text must be skipped during
 765         // painting. However, they may appear visually in the middle
 766         // of a row; they must be skipped, wherever they are...
 767         // * logically "abc_[HEBREW_\nHEBREW]"
 768         // * visually "abc_[_WERBEH\nWERBEH]"
 769         pos_type skipped_sep_vpos = -1;
 770         pos_type body_pos = par_.beginOfBody();
 771         if (body_pos > 0 &&
 772                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 773                 body_pos = 0;
 774         }
 775
 776         Layout const & layout = par_.layout();
 777
 778         Change change_running;
 779         int change_last_x = 0;
 780
 781         // check for possible inline completion
 782         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 783         pos_type inlineCompletionVPos = -1;
 784         if (inlineCompletionPos.inTexted()
 785             && inlineCompletionPos.text() == &text_
 786             && inlineCompletionPos.pit() == pit_
 787             && inlineCompletionPos.pos() - 1 >= row_.pos()
 788             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 789                 // draw logically behind the previous character
 790                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 791         }
 792
 793         // Use font span to speed things up, see below
 794         FontSpan font_span;
 795         Font font;
 796
 797         // If the last logical character is a separator, don't paint it, unless
 798         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 799         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 800                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 801
 802         for (pos_type vpos = row_.pos(); vpos < end; ) {
 803                 if (x_ > pi_.base.bv->workWidth())
 804                         break;
 805
 806                 // Skip the separator at the logical end of the row
 807                 if (vpos == skipped_sep_vpos) {
 808                         ++vpos;
 809                         continue;
 810                 }
 811
 812                 pos_type const pos = bidi_.vis2log(vpos);
 813
 814                 if (pos >= par_.size()) {
 815                         ++vpos;
 816                         continue;
 817                 }
 818
 819                 // Use font span to speed things up, see above
 820                 if (vpos < font_span.first || vpos > font_span.last) {
 821                         font_span = par_.fontSpan(vpos);
 822                         font = text_metrics_.displayFont(pit_, vpos);
 823
 824                         // split font span if inline completion is inside
 825                         if (font_span.first <= inlineCompletionVPos
 826                             && font_span.last > inlineCompletionVPos)
 827                                 font_span.last = inlineCompletionVPos;
 828                 }
 829
 830                 const int width_pos = pm_.singleWidth(pos, font);
 831
 832                 if (x_ + width_pos < 0) {
 833                         x_ += width_pos;
 834                         ++vpos;
 835                         continue;
 836                 }
 837                 Change const & change = par_.lookupChange(pos);
 838                 if (change.changed() && !change_running.changed()) {
 839                         change_running = change;
 840                         change_last_x = int(x_);
 841                 }
 842
 843                 Inset const * inset = par_.getInset(pos);
 844                 bool const highly_editable_inset = inset
 845                         && inset->editable();
 846
 847                 // If we reach the end of a change or if the author changes, paint it.
 848                 // We also don't paint across things like tables
 849                 if (change_running.changed() && (highly_editable_inset
 850                         || !change.changed() || !change_running.isSimilarTo(change))) {
 851                         // Calculate 1/3 height of the buffer's default font
 852                         FontMetrics const & fm
 853                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 854                         int const y_bar = change_running.deleted() ?
 855                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 856                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 857                                 change_running.color(), Painter::line_solid, 0.5);
 858
 859                         // Change might continue with a different author or type
 860                         if (change.changed() && !highly_editable_inset) {
 861                                 change_running = change;
 862                                 change_last_x = int(x_);
 863                         } else
 864                                 change_running.setUnchanged();
 865                 }
 866
 867                 if (body_pos > 0 && pos == body_pos - 1) {
 868                         int const lwidth = theFontMetrics(labelFont())
 869                                 .width(layout.labelsep);
 870
 871                         x_ += row_.label_hfill + lwidth - width_pos;
 872                 }
 873
 874                 // Is the inline completion in front of character?
 875                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 876                         paintInlineCompletion(font);
 877
 878                 if (par_.isSeparator(pos)) {
 879                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 880                         double const orig_x = x_;
 881                         x_ += width_pos;
 882                         if (pos >= body_pos)
 883                                 x_ += row_.separator;
 884                         paintForeignMark(orig_x, orig_font.language());
 885                         ++vpos;
 886
 887                 } else if (inset) {
 888                         // If outer row has changed, nested insets are repaint completely.
 889                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 890
 891                         bool const pi_selected = pi_.selected;
 892                         Cursor const & cur = pi_.base.bv->cursor();
 893                         if (cur.selection() && cur.text() == &text_
 894                                   && cur.normalAnchor().text() == &text_)
 895                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 896                         paintInset(inset, pos);
 897                         pi_.selected = pi_selected;
 898                         ++vpos;
 899
 900                 } else {
 901                         // paint as many characters as possible.
 902                         paintFromPos(vpos, change_running.changed());
 903                 }
 904
 905                 // Is the inline completion after character?
 906                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 907                         paintInlineCompletion(font);
 908         }
 909
 910         // if we reach the end of a struck out range, paint it
 911         if (change_running.changed()) {
 912                 FontMetrics const & fm
 913                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 914                 int const y_bar = change_running.deleted() ?
 915                                 yo_ - fm.maxAscent() / 3 : yo_ + fm.maxAscent() / 6;
 916                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 917                         change_running.color(), Painter::line_solid, 0.5);
 918                 change_running.setUnchanged();
 919         }
 920 }
 921
 922
 923 void RowPainter::paintInlineCompletion(Font const & font)
 924 {
 925         docstring completion = pi_.base.bv->inlineCompletion();
 926         FontInfo f = font.fontInfo();
 927         bool rtl = font.isRightToLeft();
 928
 929         // draw the unique and the non-unique completion part
 930         // Note: this is not time-critical as it is
 931         // only done once per screen.
 932         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 933         docstring s1 = completion.substr(0, uniqueTo);
 934         docstring s2 = completion.substr(uniqueTo);
 935         ColorCode c1 = Color_inlinecompletion;
 936         ColorCode c2 = Color_nonunique_inlinecompletion;
 937
 938         // right to left?
 939         if (rtl) {
 940                 swap(s1, s2);
 941                 swap(c1, c2);
 942         }
 943
 944         if (s1.size() > 0) {
 945                 f.setColor(c1);
 946                 pi_.pain.text(int(x_), yo_, s1, f);
 947                 x_ += theFontMetrics(font).width(s1);
 948         }
 949
 950         if (s2.size() > 0) {
 951                 f.setColor(c2);
 952                 pi_.pain.text(int(x_), yo_, s2, f);
 953                 x_ += theFontMetrics(font).width(s2);
 954         }
 955 }
 956
 957 } // namespace lyx