src/rowpainter.cpp

   1 /**
   2  * \file rowpainter.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author various
   7  * \author John Levon
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13 #include <algorithm>
  14
  15 #include "rowpainter.h"
  16
  17 #include "Buffer.h"
  18 #include "CoordCache.h"
  19 #include "Cursor.h"
  20 #include "BufferParams.h"
  21 #include "BufferView.h"
  22 #include "Changes.h"
  23 #include "Language.h"
  24 #include "Layout.h"
  25 #include "LyXRC.h"
  26 #include "Row.h"
  27 #include "MetricsInfo.h"
  28 #include "Paragraph.h"
  29 #include "ParagraphMetrics.h"
  30 #include "ParagraphParameters.h"
  31 #include "TextMetrics.h"
  32 #include "VSpace.h"
  33
  34 #include "frontends/FontMetrics.h"
  35 #include "frontends/Painter.h"
  36
  37 #include "insets/InsetText.h"
  38
  39 #include "mathed/InsetMath.h"
  40
  41 #include "support/debug.h"
  42 #include "support/gettext.h"
  43 #include "support/textutils.h"
  44
  45 #include "support/lassert.h"
  46 #include <boost/crc.hpp>
  47
  48 using namespace std;
  49
  50 namespace lyx {
  51
  52 using frontend::Painter;
  53 using frontend::FontMetrics;
  54
  55
  56 RowPainter::RowPainter(PainterInfo & pi,
  57         Text const & text, pit_type pit, Row const & row, int x, int y)
  58         : pi_(pi), text_(text),
  59           text_metrics_(pi_.base.bv->textMetrics(&text)),
  60           pars_(text.paragraphs()),
  61           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  62           pm_(text_metrics_.parMetrics(pit)), change_(pi_.change_),
  63           xo_(x), yo_(y), width_(text_metrics_.width()),
  64           solid_line_thickness_(1.0), solid_line_offset_(1),
  65           dotted_line_thickness_(1.0), dotted_line_offset_(2)
  66 {
  67         bidi_.computeTables(par_, pi_.base.bv->buffer(), row_);
  68
  69         if (lyxrc.zoom >= 200) {
  70                 // derive the line thickness from zoom factor
  71                 // the zoom is given in percent
  72                 // (increase thickness at 250%, 450% etc.)
  73                 solid_line_thickness_ = (float)(int((lyxrc.zoom + 50) / 200.0));
  74                 // adjust line_offset_ too
  75                 solid_line_offset_ = 1 + int(0.5 * solid_line_thickness_);
  76         }
  77         if (lyxrc.zoom >= 100) {
  78                 // derive the line thickness from zoom factor
  79                 // the zoom is given in percent
  80                 // (increase thickness at 150%, 250% etc.)
  81                 dotted_line_thickness_ = (float)(int((lyxrc.zoom + 50) / 100.0));
  82                 // adjust line_offset_ too
  83                 dotted_line_offset_ = int(0.5 * dotted_line_thickness_) + 1;
  84         }
  85
  86         x_ = row_.x + xo_;
  87
  88         //lyxerr << "RowPainter: x: " << x_ << " xo: " << xo_ << " yo: " << yo_ << endl;
  89         //row_.dump();
  90
  91         LBUFERR(pit >= 0);
  92         LBUFERR(pit < int(text.paragraphs().size()));
  93 }
  94
  95
  96 FontInfo RowPainter::labelFont() const
  97 {
  98         FontInfo f = text_.labelFont(par_);
  99         // selected text?
 100         if (row_.begin_margin_sel || pi_.selected)
 101                 f.setPaintColor(Color_selectiontext);
 102         return f;
 103 }
 104
 105
 106 int RowPainter::leftMargin() const
 107 {
 108         return text_metrics_.leftMargin(text_metrics_.width(), pit_,
 109                 row_.pos());
 110 }
 111
 112 // If you want to debug inset metrics uncomment the following line:
 113 //#define DEBUG_METRICS
 114 // This draws green lines around each inset.
 115
 116
 117 void RowPainter::paintInset(Inset const * inset, pos_type const pos)
 118 {
 119         Font const font = text_metrics_.displayFont(pit_, pos);
 120
 121         LASSERT(inset, return);
 122         // Backup full_repaint status because some insets (InsetTabular)
 123         // requires a full repaint
 124         bool pi_full_repaint = pi_.full_repaint;
 125
 126         pi_.base.font = inset->inheritFont() ? font.fontInfo() :
 127                 pi_.base.bv->buffer().params().getFont().fontInfo();
 128         pi_.ltr_pos = (bidi_.level(pos) % 2 == 0);
 129         Change prev_change = change_;
 130         pi_.change_ = change_.changed() ? change_ : par_.lookupChange(pos);
 131
 132         int const x1 = int(x_);
 133         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 134         // insets are painted completely. Recursive
 135         // FIXME: it is wrong to completely paint the background
 136         // if we want to do single row painting.
 137         inset->drawBackground(pi_, x1, yo_);
 138         inset->drawSelection(pi_, x1, yo_);
 139         inset->draw(pi_, x1, yo_);
 140
 141         Dimension const & dim = pm_.insetDimension(inset);
 142
 143         paintForeignMark(x_, font.language(), dim.descent());
 144
 145         x_ += dim.width();
 146
 147         // Restore full_repaint status.
 148         pi_.full_repaint = pi_full_repaint;
 149         pi_.change_ = prev_change;
 150
 151 #ifdef DEBUG_METRICS
 152         int const x2 = x1 + dim.wid;
 153         int const y1 = yo_ + dim.des;
 154         int const y2 = yo_ - dim.asc;
 155         pi_.pain.line(x1, y1, x1, y2, Color_green);
 156         pi_.pain.line(x1, y1, x2, y1, Color_green);
 157         pi_.pain.line(x2, y1, x2, y2, Color_green);
 158         pi_.pain.line(x1, y2, x2, y2, Color_green);
 159 #endif
 160 }
 161
 162
 163 void RowPainter::paintChars(pos_type & vpos, Font const & font)
 164 {
 165         // This method takes up 70% of time when typing
 166         pos_type pos = bidi_.vis2log(vpos);
 167         // first character
 168         char_type prev_char = par_.getChar(pos);
 169         vector<char_type> str;
 170         str.reserve(100);
 171         str.push_back(prev_char);
 172
 173         // special case for arabic
 174         string const & lang = font.language()->lang();
 175         bool const swap_paren = lang == "arabic_arabtex"
 176                 || lang == "arabic_arabi"
 177                 || lang == "farsi";
 178
 179         // FIXME: Why only round brackets and why the difference to
 180         // Hebrew? See also Paragraph::getUChar
 181         if (swap_paren) {
 182                 char_type c = str[0];
 183                 if (c == '(')
 184                         c = ')';
 185                 else if (c == ')')
 186                         c = '(';
 187                 str[0] = c;
 188         }
 189
 190         pos_type const end = row_.endpos();
 191         FontSpan const font_span = par_.fontSpan(pos);
 192         // Track-change status.
 193         Change const & change_running = par_.lookupChange(pos);
 194
 195         // selected text?
 196         bool const selection = (pos >= row_.sel_beg && pos < row_.sel_end)
 197                 || pi_.selected;
 198
 199         // spelling correct?
 200         bool const spell_state =
 201                 lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 202
 203         // collect as much similar chars as we can
 204         for (++vpos ; vpos < end ; ++vpos) {
 205                 if (lyxrc.force_paint_single_char)
 206                         break;
 207
 208                 pos = bidi_.vis2log(vpos);
 209                 if (pos < font_span.first || pos > font_span.last)
 210                         break;
 211
 212                 bool const new_selection = pos >= row_.sel_beg && pos < row_.sel_end;
 213                 if (new_selection != selection)
 214                         // Selection ends or starts here.
 215                         break;
 216
 217                 bool const new_spell_state =
 218                         lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 219                 if (new_spell_state != spell_state)
 220                         // Spell checker state changed here.
 221                         break;
 222
 223                 Change const & change = par_.lookupChange(pos);
 224                 if (!change_running.isSimilarTo(change))
 225                         // Track change type or author has changed.
 226                         break;
 227
 228                 char_type c = par_.getChar(pos);
 229
 230                 if (c == '\t')
 231                         break;
 232
 233                 if (!isPrintableNonspace(c))
 234                         break;
 235
 236                 // FIXME: Why only round brackets and why the difference to
 237                 // Hebrew? See also Paragraph::getUChar
 238                 if (swap_paren) {
 239                         if (c == '(')
 240                                 c = ')';
 241                         else if (c == ')')
 242                                 c = '(';
 243                 }
 244
 245                 str.push_back(c);
 246                 prev_char = c;
 247         }
 248
 249         docstring s(&str[0], str.size());
 250
 251         if (s[0] == '\t')
 252                 s.replace(0,1,from_ascii("    "));
 253
 254         /* Because we do our own bidi, at this point the strings are
 255          * already in visual order. However, Qt also applies its own
 256          * bidi algorithm to strings that it paints to the screen.
 257          * Therefore, if we were to paint Hebrew/Arabic words as a
 258          * single string, the letters in the words would get reversed
 259          * again. In order to avoid that, we force LTR drawing.
 260          * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 261          * for an earlier thread on the subject
 262          */
 263         // Left-to-right override: forces to draw text left-to-right
 264         char_type const LRO = 0x202D;
 265         // Right-to-left override: forces to draw text right-to-left
 266         char_type const RLO = 0x202E;
 267         // Pop directional formatting: return to previous state
 268         char_type const PDF = 0x202C;
 269         if (font.isVisibleRightToLeft()) {
 270                 reverse(s.begin(), s.end());
 271                 s = RLO + s + PDF;
 272         } else
 273                 s = LRO + s + PDF;
 274
 275         if (!selection && !change_running.changed()) {
 276                 x_ += pi_.pain.text(int(x_), yo_, s, font.fontInfo());
 277                 return;
 278         }
 279
 280         FontInfo copy = font.fontInfo();
 281         if (change_running.changed())
 282                 copy.setPaintColor(change_running.color());
 283         else if (selection)
 284                 copy.setPaintColor(Color_selectiontext);
 285
 286         x_ += pi_.pain.text(int(x_), yo_, s, copy);
 287 }
 288
 289
 290 void RowPainter::paintSeparator(double orig_x, double width,
 291         FontInfo const & font)
 292 {
 293         pi_.pain.textDecoration(font, int(orig_x), yo_, int(width));
 294         x_ += width;
 295 }
 296
 297
 298 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 299                 int desc)
 300 {
 301         if (!lyxrc.mark_foreign_language)
 302                 return;
 303         if (lang == latex_language)
 304                 return;
 305         if (lang == pi_.base.bv->buffer().params().language)
 306                 return;
 307
 308         int const y = yo_ + solid_line_offset_ + desc + int(solid_line_thickness_/2);
 309         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language,
 310                 Painter::line_solid, solid_line_thickness_);
 311 }
 312
 313
 314 void RowPainter::paintMisspelledMark(double orig_x, bool changed)
 315 {
 316         // if changed the misspelled marker gets placed slightly lower than normal
 317         // to avoid drawing at the same vertical offset
 318         float const y = yo_ + solid_line_offset_ + solid_line_thickness_
 319                 + (changed ? solid_line_thickness_ + 1 : 0)
 320                 + dotted_line_offset_;
 321         pi_.pain.line(int(orig_x), int(y), int(x_), int(y), Color_error,
 322                 Painter::line_onoffdash, dotted_line_thickness_);
 323 }
 324
 325
 326 void RowPainter::paintFromPos(pos_type & vpos, bool changed)
 327 {
 328         pos_type const pos = bidi_.vis2log(vpos);
 329         Font const font = text_metrics_.displayFont(pit_, pos);
 330         double const orig_x = x_;
 331
 332         paintChars(vpos, font);
 333         paintForeignMark(orig_x, font.language());
 334
 335         // Paint the spelling mark if needed.
 336         if (lyxrc.spellcheck_continuously && par_.isMisspelled(pos)) {
 337                 // check for cursor position
 338                 // don't draw misspelled marker for words at cursor position
 339                 // we don't want to disturb the process of text editing
 340                 BufferView const * bv = pi_.base.bv;
 341                 DocIterator const nw = bv->cursor().newWord();
 342                 bool new_word = false;
 343                 if (!nw.empty() && par_.id() == nw.paragraph().id()) {
 344                         pos_type cpos = nw.pos();
 345                         if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
 346                                 --cpos;
 347                         else if (cpos > 0 && par_.isWordSeparator(cpos))
 348                                 --cpos;
 349                         new_word = par_.isSameSpellRange(pos, cpos) ;
 350                 }
 351                 if (!new_word)
 352                         paintMisspelledMark(orig_x, changed);
 353         }
 354 }
 355
 356
 357 void RowPainter::paintChangeBar()
 358 {
 359         pos_type const start = row_.pos();
 360         pos_type end = row_.endpos();
 361
 362         if (par_.size() == end) {
 363                 // this is the last row of the paragraph;
 364                 // thus, we must also consider the imaginary end-of-par character
 365                 end++;
 366         }
 367
 368         if (start == end || !par_.isChanged(start, end))
 369                 return;
 370
 371         int const height = text_metrics_.isLastRow(pit_, row_)
 372                 ? row_.ascent()
 373                 : row_.height();
 374
 375         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 376 }
 377
 378
 379 void RowPainter::paintAppendix()
 380 {
 381         // only draw the appendix frame once (for the main text)
 382         if (!par_.params().appendix() || !text_.isMainText())
 383                 return;
 384
 385         int y = yo_ - row_.ascent();
 386
 387         if (par_.params().startOfAppendix())
 388                 y += 2 * defaultRowHeight();
 389
 390         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 391         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 392 }
 393
 394
 395 void RowPainter::paintDepthBar()
 396 {
 397         depth_type const depth = par_.getDepth();
 398
 399         if (depth <= 0)
 400                 return;
 401
 402         depth_type prev_depth = 0;
 403         if (!text_metrics_.isFirstRow(pit_, row_)) {
 404                 pit_type pit2 = pit_;
 405                 if (row_.pos() == 0)
 406                         --pit2;
 407                 prev_depth = pars_[pit2].getDepth();
 408         }
 409
 410         depth_type next_depth = 0;
 411         if (!text_metrics_.isLastRow(pit_, row_)) {
 412                 pit_type pit2 = pit_;
 413                 if (row_.endpos() >= pars_[pit2].size())
 414                         ++pit2;
 415                 next_depth = pars_[pit2].getDepth();
 416         }
 417
 418         for (depth_type i = 1; i <= depth; ++i) {
 419                 int const w = nestMargin() / 5;
 420                 int x = int(xo_) + w * i;
 421                 // only consider the changebar space if we're drawing outermost text
 422                 if (text_.isMainText())
 423                         x += changebarMargin();
 424
 425                 int const starty = yo_ - row_.ascent();
 426                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 427
 428                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 429
 430                 if (i > prev_depth)
 431                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 432                 if (i > next_depth)
 433                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 434         }
 435 }
 436
 437
 438 int RowPainter::paintAppendixStart(int y)
 439 {
 440         FontInfo pb_font = sane_font;
 441         pb_font.setColor(Color_appendix);
 442         pb_font.decSize();
 443
 444         int w = 0;
 445         int a = 0;
 446         int d = 0;
 447
 448         docstring const label = _("Appendix");
 449         theFontMetrics(pb_font).rectText(label, w, a, d);
 450
 451         int const text_start = int(xo_ + (width_ - w) / 2);
 452         int const text_end = text_start + w;
 453
 454         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 455
 456         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 457         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 458
 459         return 3 * defaultRowHeight();
 460 }
 461
 462
 463 void RowPainter::paintFirst()
 464 {
 465         BufferParams const & bparams = pi_.base.bv->buffer().params();
 466         Layout const & layout = par_.layout();
 467
 468         int y_top = 0;
 469
 470         // start of appendix?
 471         if (par_.params().startOfAppendix())
 472                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 473
 474         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 475                 && pit_ != 0) {
 476                 if (layout.latextype == LATEX_PARAGRAPH
 477                     && !par_.getDepth()) {
 478                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 479                 } else {
 480                         Layout const & playout = pars_[pit_ - 1].layout();
 481                         if (playout.latextype == LATEX_PARAGRAPH
 482                             && !pars_[pit_ - 1].getDepth()) {
 483                                 // is it right to use defskip here, too? (AS)
 484                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 485                         }
 486                 }
 487         }
 488
 489         bool const is_first =
 490                 text_.isFirstInSequence(pit_) || !layout.isParagraphGroup();
 491         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 492
 493         if (layout.labelIsInline()
 494                         && (layout.labeltype != LABEL_STATIC || is_first)) {
 495                 paintLabel();
 496         } else if (is_first && layout.labelIsAbove()) {
 497                 paintTopLevelLabel();
 498         }
 499 }
 500
 501
 502 void RowPainter::paintLabel()
 503 {
 504         docstring const str = par_.labelString();
 505         if (str.empty())
 506                 return;
 507
 508         bool const is_rtl = text_.isRTL(par_);
 509         Layout const & layout = par_.layout();
 510         FontInfo const font = labelFont();
 511         FontMetrics const & fm = theFontMetrics(font);
 512         double x = x_;
 513
 514         if (is_rtl) {
 515                 x = width_ - leftMargin()
 516                         + fm.width(layout.labelsep);
 517         } else {
 518                 x = x_ - fm.width(layout.labelsep)
 519                         - fm.width(str);
 520         }
 521
 522         pi_.pain.text(int(x), yo_, str, font);
 523 }
 524
 525
 526 void RowPainter::paintTopLevelLabel()
 527 {
 528         BufferParams const & bparams = pi_.base.bv->buffer().params();
 529         bool const is_rtl = text_.isRTL(par_);
 530         ParagraphParameters const & pparams = par_.params();
 531         Layout const & layout = par_.layout();
 532         FontInfo const font = labelFont();
 533         docstring const str = par_.labelString();
 534         if (str.empty())
 535                 return;
 536
 537         double spacing_val = 1.0;
 538         if (!pparams.spacing().isDefault())
 539                 spacing_val = pparams.spacing().getValue();
 540         else
 541                 spacing_val = bparams.spacing().getValue();
 542
 543         FontMetrics const & fm = theFontMetrics(font);
 544
 545         int const labeladdon = int(fm.maxHeight()
 546                 * layout.spacing.getValue() * spacing_val);
 547
 548         int maxdesc =
 549                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 550                 + (layout.labelbottomsep * defaultRowHeight()));
 551
 552         double x = x_;
 553         if (layout.labeltype == LABEL_CENTERED) {
 554                 if (is_rtl)
 555                         x = leftMargin();
 556                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 557                 x -= fm.width(str) / 2;
 558         } else if (is_rtl) {
 559                 x = width_ - leftMargin() -     fm.width(str);
 560         }
 561         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 562 }
 563
 564
 565 /** Check if the current paragraph is the last paragraph in a
 566     proof environment */
 567 static int getEndLabel(pit_type p, Text const & text)
 568 {
 569         ParagraphList const & pars = text.paragraphs();
 570         pit_type pit = p;
 571         depth_type par_depth = pars[p].getDepth();
 572         while (pit != pit_type(pars.size())) {
 573                 Layout const & layout = pars[pit].layout();
 574                 int const endlabeltype = layout.endlabeltype;
 575
 576                 if (endlabeltype != END_LABEL_NO_LABEL) {
 577                         if (p + 1 == pit_type(pars.size()))
 578                                 return endlabeltype;
 579
 580                         depth_type const next_depth =
 581                                 pars[p + 1].getDepth();
 582                         if (par_depth > next_depth ||
 583                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 584                                 return endlabeltype;
 585                         break;
 586                 }
 587                 if (par_depth == 0)
 588                         break;
 589                 pit = text.outerHook(pit);
 590                 if (pit != pit_type(pars.size()))
 591                         par_depth = pars[pit].getDepth();
 592         }
 593         return END_LABEL_NO_LABEL;
 594 }
 595
 596
 597 void RowPainter::paintLast()
 598 {
 599         bool const is_rtl = text_.isRTL(par_);
 600         int const endlabel = getEndLabel(pit_, text_);
 601
 602         // paint imaginary end-of-paragraph character
 603
 604         Change const & change = par_.lookupChange(par_.size());
 605         if (change.changed()) {
 606                 FontMetrics const & fm =
 607                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 608                 int const length = fm.maxAscent() / 2;
 609                 Color col = change.color();
 610
 611                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 612                            Painter::line_solid, 3);
 613
 614                 if (change.deleted()) {
 615                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 616                                 yo_ + 2, col, Painter::line_solid, 3);
 617                 } else {
 618                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 619                                 yo_ + 2, col, Painter::line_solid, 3);
 620                 }
 621         }
 622
 623         // draw an endlabel
 624
 625         switch (endlabel) {
 626         case END_LABEL_BOX:
 627         case END_LABEL_FILLED_BOX: {
 628                 FontInfo const font = labelFont();
 629                 FontMetrics const & fm = theFontMetrics(font);
 630                 int const size = int(0.75 * fm.maxAscent());
 631                 int const y = yo_ - size;
 632                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 633                 int x = is_rtl ? nestMargin() + changebarMargin()
 634                         : max_row_width - text_metrics_.rightMargin(pm_);
 635
 636                 // If needed, move the box a bit to avoid overlapping with text.
 637                 int const rem = max_row_width - row_.width();
 638                 if (rem <= 0)
 639                         x += is_rtl ? rem : - rem;
 640
 641                 if (endlabel == END_LABEL_BOX)
 642                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 643                 else
 644                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 645                 break;
 646         }
 647
 648         case END_LABEL_STATIC: {
 649                 FontInfo const font = labelFont();
 650                 FontMetrics const & fm = theFontMetrics(font);
 651                 docstring const & str = par_.layout().endlabelstring();
 652                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 653                 pi_.pain.text(int(x), yo_, str, font);
 654                 break;
 655         }
 656
 657         case END_LABEL_NO_LABEL:
 658                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 659                         docstring const s = docstring(1, char_type(0x00B6));
 660                         FontInfo f = FontInfo(text_.layoutFont(pit_));
 661                         f.setColor(Color_paragraphmarker);
 662                         pi_.pain.text(int(x_), yo_, s, f);
 663                         x_ += theFontMetrics(f).width(s);
 664                 }
 665                 break;
 666         }
 667 }
 668
 669
 670 void RowPainter::paintOnlyInsets()
 671 {
 672         CoordCache const & cache = pi_.base.bv->coordCache();
 673         pos_type const end = row_.endpos();
 674         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 675                 // If outer row has changed, nested insets are repaint completely.
 676                 Inset const * inset = par_.getInset(pos);
 677                 bool const nested_inset = inset &&
 678                                 ((inset->asInsetMath() &&
 679                                   !inset->asInsetMath()->asMacroTemplate())
 680                                  || inset->asInsetText()
 681                                  || inset->asInsetTabular());
 682                 if (!nested_inset)
 683                         continue;
 684                 if (x_ > pi_.base.bv->workWidth()
 685                     || !cache.getInsets().has(inset))
 686                         continue;
 687                 x_ = cache.getInsets().x(inset);
 688
 689                 bool const pi_selected = pi_.selected;
 690                 Cursor const & cur = pi_.base.bv->cursor();
 691                 if (cur.selection() && cur.text() == &text_
 692                           && cur.normalAnchor().text() == &text_)
 693                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 694                 paintInset(inset, pos);
 695                 pi_.selected = pi_selected;
 696         }
 697 }
 698
 699
 700 void RowPainter::paintText()
 701 {
 702         pos_type const end = row_.endpos();
 703         // Spaces at logical line breaks in bidi text must be skipped during
 704         // painting. However, they may appear visually in the middle
 705         // of a row; they must be skipped, wherever they are...
 706         // * logically "abc_[HEBREW_\nHEBREW]"
 707         // * visually "abc_[_WERBEH\nWERBEH]"
 708         pos_type skipped_sep_vpos = -1;
 709         pos_type body_pos = par_.beginOfBody();
 710         if (body_pos > 0 &&
 711                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 712                 body_pos = 0;
 713         }
 714
 715         Layout const & layout = par_.layout();
 716
 717         Change change_running;
 718         int change_last_x = 0;
 719
 720         // check for possible inline completion
 721         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 722         pos_type inlineCompletionVPos = -1;
 723         if (inlineCompletionPos.inTexted()
 724             && inlineCompletionPos.text() == &text_
 725             && inlineCompletionPos.pit() == pit_
 726             && inlineCompletionPos.pos() - 1 >= row_.pos()
 727             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 728                 // draw logically behind the previous character
 729                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 730         }
 731
 732         // Use font span to speed things up, see below
 733         FontSpan font_span;
 734         Font font;
 735
 736         // If the last logical character is a separator, don't paint it, unless
 737         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 738         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 739                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 740
 741         for (pos_type vpos = row_.pos(); vpos < end; ) {
 742                 if (x_ > pi_.base.bv->workWidth())
 743                         break;
 744
 745                 // Skip the separator at the logical end of the row
 746                 if (vpos == skipped_sep_vpos) {
 747                         ++vpos;
 748                         continue;
 749                 }
 750
 751                 pos_type const pos = bidi_.vis2log(vpos);
 752
 753                 if (pos >= par_.size()) {
 754                         ++vpos;
 755                         continue;
 756                 }
 757
 758                 // Use font span to speed things up, see above
 759                 if (vpos < font_span.first || vpos > font_span.last) {
 760                         font_span = par_.fontSpan(vpos);
 761                         font = text_metrics_.displayFont(pit_, vpos);
 762
 763                         // split font span if inline completion is inside
 764                         if (font_span.first <= inlineCompletionVPos
 765                             && font_span.last > inlineCompletionVPos)
 766                                 font_span.last = inlineCompletionVPos;
 767                 }
 768
 769                 const int width_pos = pm_.singleWidth(pos, font);
 770
 771                 if (x_ + width_pos < 0) {
 772                         x_ += width_pos;
 773                         ++vpos;
 774                         continue;
 775                 }
 776                 Change const & change = par_.lookupChange(pos);
 777                 if (change.changed() && !change_running.changed()) {
 778                         change_running = change;
 779                         change_last_x = int(x_);
 780                 }
 781
 782                 Inset const * inset = par_.getInset(pos);
 783                 bool const highly_editable_inset = inset
 784                         && inset->editable();
 785
 786                 // If we reach the end of a change or if the author changes, paint it.
 787                 // We also don't paint across things like tables
 788                 if (change_running.changed() && (highly_editable_inset
 789                         || !change.changed() || !change_running.isSimilarTo(change))) {
 790                         // Calculate 1/3 height of the buffer's default font
 791                         FontMetrics const & fm
 792                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 793                         float const y_bar = change_running.deleted() ?
 794                                 yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 795                         pi_.pain.line(change_last_x, int(y_bar), int(x_), int(y_bar),
 796                                 change_running.color(), Painter::line_solid, solid_line_thickness_);
 797
 798                         // Change might continue with a different author or type
 799                         if (change.changed() && !highly_editable_inset) {
 800                                 change_running = change;
 801                                 change_last_x = int(x_);
 802                         } else
 803                                 change_running.setUnchanged();
 804                 }
 805
 806                 if (body_pos > 0 && pos == body_pos - 1) {
 807                         int const lwidth = theFontMetrics(labelFont())
 808                                 .width(layout.labelsep);
 809
 810                         x_ += row_.label_hfill + lwidth - width_pos;
 811                 }
 812
 813                 // Is the inline completion in front of character?
 814                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 815                         paintInlineCompletion(font);
 816
 817                 if (par_.isSeparator(pos)) {
 818                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 819                         double const orig_x = x_;
 820                         double separator_width = width_pos;
 821                         if (pos >= body_pos)
 822                                 separator_width += row_.separator;
 823                         paintSeparator(orig_x, separator_width, orig_font.fontInfo());
 824                         paintForeignMark(orig_x, orig_font.language());
 825                         ++vpos;
 826
 827                 } else if (inset) {
 828                         // If outer row has changed, nested insets are repaint completely.
 829                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 830
 831                         bool const pi_selected = pi_.selected;
 832                         Cursor const & cur = pi_.base.bv->cursor();
 833                         if (cur.selection() && cur.text() == &text_
 834                                   && cur.normalAnchor().text() == &text_)
 835                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 836                         paintInset(inset, pos);
 837                         pi_.selected = pi_selected;
 838                         ++vpos;
 839
 840                 } else {
 841                         // paint as many characters as possible.
 842                         paintFromPos(vpos, change_running.changed());
 843                 }
 844
 845                 // Is the inline completion after character?
 846                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 847                         paintInlineCompletion(font);
 848         }
 849
 850         // if we reach the end of a struck out range, paint it
 851         if (change_running.changed()) {
 852                 FontMetrics const & fm
 853                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 854                 float const y_bar = change_running.deleted() ?
 855                                 yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 856                 pi_.pain.line(change_last_x, int(y_bar), int(x_), int(y_bar),
 857                         change_running.color(), Painter::line_solid, solid_line_thickness_);
 858                 change_running.setUnchanged();
 859         }
 860 }
 861
 862
 863 void RowPainter::paintSelection()
 864 {
 865         if (!row_.selection())
 866                 return;
 867         Cursor const & curs = pi_.base.bv->cursor();
 868         DocIterator beg = curs.selectionBegin();
 869         beg.pit() = pit_;
 870         beg.pos() = row_.sel_beg;
 871
 872         DocIterator end = curs.selectionEnd();
 873         end.pit() = pit_;
 874         end.pos() = row_.sel_end;
 875
 876         bool const begin_boundary = beg.pos() >= row_.endpos();
 877         bool const end_boundary = row_.sel_end == row_.endpos();
 878
 879         DocIterator cur = beg;
 880         cur.boundary(begin_boundary);
 881         int x1 = text_metrics_.cursorX(beg.top(), begin_boundary);
 882         int x2 = text_metrics_.cursorX(end.top(), end_boundary);
 883         int const y1 = yo_ - row_.ascent();
 884         int const y2 = y1 + row_.height();
 885
 886         int const rm = text_.isMainText() ? pi_.base.bv->rightMargin() : 0;
 887         int const lm = text_.isMainText() ? pi_.base.bv->leftMargin() : 0;
 888
 889         // draw the margins
 890         if (row_.begin_margin_sel) {
 891                 if (text_.isRTL(beg.paragraph())) {
 892                         pi_.pain.fillRectangle(int(xo_ + x1), y1,
 893                                 text_metrics_.width() - rm - x1, y2 - y1, Color_selection);
 894                 } else {
 895                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x1 - lm, y2 - y1,
 896                                 Color_selection);
 897                 }
 898         }
 899
 900         if (row_.end_margin_sel) {
 901                 if (text_.isRTL(beg.paragraph())) {
 902                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x2 - lm, y2 - y1,
 903                                 Color_selection);
 904                 } else {
 905                         pi_.pain.fillRectangle(int(xo_ + x2), y1, text_metrics_.width() - rm - x2,
 906                                 y2 - y1, Color_selection);
 907                 }
 908         }
 909
 910         // if we are on a boundary from the beginning, it's probably
 911         // a RTL boundary and we jump to the other side directly as this
 912         // segement is 0-size and confuses the logic below
 913         if (cur.boundary())
 914                 cur.boundary(false);
 915
 916         // go through row and draw from RTL boundary to RTL boundary
 917         while (cur < end) {
 918                 bool draw_now = false;
 919
 920                 // simplified cursorForward code below which does not
 921                 // descend into insets and which does not go into the
 922                 // next line. Compare the logic with the original cursorForward
 923
 924                 // if left of boundary -> just jump to right side, but
 925                 // for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
 926                 if (cur.boundary()) {
 927                         cur.boundary(false);
 928                 }       else if (text_metrics_.isRTLBoundary(cur.pit(), cur.pos() + 1)) {
 929                         // in front of RTL boundary -> Stay on this side of the boundary
 930                         // because:  ab|cDDEEFFghi -> abc|DDEEFFghi
 931                         ++cur.pos();
 932                         cur.boundary(true);
 933                         draw_now = true;
 934                 } else {
 935                         // move right
 936                         ++cur.pos();
 937
 938                         // line end?
 939                         if (cur.pos() == row_.endpos())
 940                                 cur.boundary(true);
 941                 }
 942
 943                 if (x1 == -1) {
 944                         // the previous segment was just drawn, now the next starts
 945                         x1 = text_metrics_.cursorX(cur.top(), cur.boundary());
 946                 }
 947
 948                 if (!(cur < end) || draw_now) {
 949                         x2 = text_metrics_.cursorX(cur.top(), cur.boundary());
 950                         pi_.pain.fillRectangle(int(xo_ + min(x1, x2)), y1, abs(x2 - x1),
 951                                 y2 - y1, Color_selection);
 952
 953                         // reset x1, so it is set again next round (which will be on the
 954                         // right side of a boundary or at the selection end)
 955                         x1 = -1;
 956                 }
 957         }
 958 }
 959
 960
 961 void RowPainter::paintInlineCompletion(Font const & font)
 962 {
 963         docstring completion = pi_.base.bv->inlineCompletion();
 964         FontInfo f = font.fontInfo();
 965         bool rtl = font.isRightToLeft();
 966
 967         // draw the unique and the non-unique completion part
 968         // Note: this is not time-critical as it is
 969         // only done once per screen.
 970         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 971         docstring s1 = completion.substr(0, uniqueTo);
 972         docstring s2 = completion.substr(uniqueTo);
 973         ColorCode c1 = Color_inlinecompletion;
 974         ColorCode c2 = Color_nonunique_inlinecompletion;
 975
 976         // right to left?
 977         if (rtl) {
 978                 swap(s1, s2);
 979                 swap(c1, c2);
 980         }
 981
 982         if (!s1.empty()) {
 983                 f.setColor(c1);
 984                 pi_.pain.text(int(x_), yo_, s1, f);
 985                 x_ += theFontMetrics(font).width(s1);
 986         }
 987
 988         if (!s2.empty()) {
 989                 f.setColor(c2);
 990                 pi_.pain.text(int(x_), yo_, s2, f);
 991                 x_ += theFontMetrics(font).width(s2);
 992         }
 993 }
 994
 995 } // namespace lyx