src/RowPainter.cpp

   1 /**
   2  * \file RowPainter.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author various
   7  * \author John Levon
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13 #include <algorithm>
  14
  15 #include "RowPainter.h"
  16
  17 #include "Buffer.h"
  18 #include "CoordCache.h"
  19 #include "Cursor.h"
  20 #include "BufferParams.h"
  21 #include "BufferView.h"
  22 #include "Changes.h"
  23 #include "Language.h"
  24 #include "Layout.h"
  25 #include "LyXRC.h"
  26 #include "Row.h"
  27 #include "MetricsInfo.h"
  28 #include "Paragraph.h"
  29 #include "ParagraphMetrics.h"
  30 #include "ParagraphParameters.h"
  31 #include "TextMetrics.h"
  32 #include "VSpace.h"
  33
  34 #include "frontends/FontMetrics.h"
  35 #include "frontends/Painter.h"
  36
  37 #include "insets/InsetText.h"
  38
  39 #include "mathed/InsetMath.h"
  40
  41 #include "support/debug.h"
  42 #include "support/gettext.h"
  43 #include "support/textutils.h"
  44
  45 #include "support/lassert.h"
  46 #include <boost/crc.hpp>
  47
  48 using namespace std;
  49
  50 namespace lyx {
  51
  52 using frontend::Painter;
  53 using frontend::FontMetrics;
  54
  55
  56 RowPainter::RowPainter(PainterInfo & pi,
  57         Text const & text, pit_type pit, Row const & row, int x, int y)
  58         : pi_(pi), text_(text),
  59           text_metrics_(pi_.base.bv->textMetrics(&text)),
  60           pars_(text.paragraphs()),
  61           row_(row), pit_(pit), par_(text.paragraphs()[pit]),
  62           pm_(text_metrics_.parMetrics(pit)), change_(pi_.change_),
  63           xo_(x), yo_(y), width_(text_metrics_.width()),
  64           solid_line_thickness_(1), solid_line_offset_(1),
  65           dotted_line_thickness_(1), dotted_line_offset_(2)
  66 {
  67         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_ = (lyxrc.zoom + 50) / 200;
  74                 // adjust line_offset_ too
  75                 solid_line_offset_ = 1 + solid_line_thickness_ / 2;
  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_ = (lyxrc.zoom + 50) / 100;
  82                 // adjust line_offset_ too
  83                 dotted_line_offset_ = 1 + dotted_line_thickness_ / 2;
  84         }
  85
  86         x_ = row_.left_margin + 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 const pi_full_repaint = pi_.full_repaint;
 125         bool const pi_do_spellcheck = pi_.do_spellcheck;
 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         pi_.do_spellcheck &= inset->allowSpellCheck();
 133
 134         int const x1 = int(x_);
 135         pi_.base.bv->coordCache().insets().add(inset, x1, yo_);
 136         // insets are painted completely. Recursive
 137         // FIXME: it is wrong to completely paint the background
 138         // if we want to do single row painting.
 139         inset->drawBackground(pi_, x1, yo_);
 140         inset->drawSelection(pi_, x1, yo_);
 141         inset->draw(pi_, x1, yo_);
 142
 143         Dimension const & dim = pm_.insetDimension(inset);
 144
 145         paintForeignMark(x_, font.language(), dim.descent());
 146
 147         x_ += dim.width();
 148
 149         // Restore full_repaint status.
 150         pi_.full_repaint = pi_full_repaint;
 151         pi_.change_ = prev_change;
 152         pi_.do_spellcheck = pi_do_spellcheck;
 153
 154 #ifdef DEBUG_METRICS
 155         int const x2 = x1 + dim.wid;
 156         int const y1 = yo_ + dim.des;
 157         int const y2 = yo_ - dim.asc;
 158         pi_.pain.line(x1, y1, x1, y2, Color_green);
 159         pi_.pain.line(x1, y1, x2, y1, Color_green);
 160         pi_.pain.line(x2, y1, x2, y2, Color_green);
 161         pi_.pain.line(x1, y2, x2, y2, Color_green);
 162 #endif
 163 }
 164
 165
 166 void RowPainter::paintSeparator(double orig_x, double width,
 167         FontInfo const & font)
 168 {
 169         pi_.pain.textDecoration(font, int(orig_x), yo_, int(width));
 170         x_ += width;
 171 }
 172
 173
 174 void RowPainter::paintForeignMark(double orig_x, Language const * lang, int desc) const
 175 {
 176         if (!lyxrc.mark_foreign_language)
 177                 return;
 178         if (lang == latex_language)
 179                 return;
 180         if (lang == pi_.base.bv->buffer().params().language)
 181                 return;
 182
 183         int const y = yo_ + solid_line_offset_ + desc + solid_line_thickness_ / 2;
 184         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language,
 185                 Painter::line_solid, solid_line_thickness_);
 186 }
 187
 188
 189 void RowPainter::paintMisspelledMark(double const orig_x,
 190                                      docstring const & str, Font const & font,
 191                                      pos_type const start_pos,
 192                                      bool const changed) const
 193 {
 194         // if changed the misspelled marker gets placed slightly lower than normal
 195         // to avoid drawing at the same vertical offset
 196         int const y = yo_ + solid_line_offset_ + solid_line_thickness_
 197                 + (changed ? solid_line_thickness_ + 1 : 0)
 198                 + dotted_line_offset_;
 199
 200         //FIXME: this could be computed only once, it is probably not costly.
 201         // check for cursor position
 202         // don't draw misspelled marker for words at cursor position
 203         // we don't want to disturb the process of text editing
 204         DocIterator const nw = pi_.base.bv->cursor().newWord();
 205         pos_type cpos = -1;
 206         if (!nw.empty() && par_.id() == nw.paragraph().id()) {
 207                 cpos = nw.pos();
 208                 if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
 209                         --cpos;
 210                 else if (cpos > 0 && par_.isWordSeparator(cpos))
 211                         --cpos;
 212         }
 213
 214         pos_type pos = start_pos;
 215         while (pos < start_pos + pos_type(str.length())) {
 216                 if (!par_.isMisspelled(pos)) {
 217                         ++pos;
 218                         continue;
 219                 }
 220
 221                 FontSpan const & range = par_.getSpellRange(pos);
 222
 223                 // Skip element which are being edited
 224                 if (range.contains(cpos)) {
 225                         // the range includes the last element
 226                         pos = range.last + 1;
 227                         continue;
 228                 }
 229
 230                 FontMetrics const & fm = theFontMetrics(font);
 231                 int x1 = fm.pos2x(str, range.first - start_pos,
 232                                   font.isVisibleRightToLeft());
 233                 int x2 = fm.pos2x(str, range.last - start_pos + 1,
 234                                   font.isVisibleRightToLeft());
 235                 if (x1 > x2)
 236                         swap(x1, x2);
 237
 238                 pi_.pain.line(int(orig_x) + x1, y, int(orig_x) + x2, y,
 239                               Color_error,
 240                               Painter::line_onoffdash, dotted_line_thickness_);
 241                 pos = range.last + 1;
 242         }
 243 }
 244
 245
 246 void RowPainter::paintTextAndSel(docstring const & str, Font const & font,
 247                                  Change const & change,
 248                                  pos_type start_pos, pos_type end_pos)
 249 {
 250         // at least part of text selected?
 251         bool const some_sel = (end_pos >= row_.sel_beg && start_pos < row_.sel_end)
 252                 || pi_.selected;
 253         // all the text selected?
 254         bool const all_sel = (start_pos >= row_.sel_beg && end_pos < row_.sel_end)
 255                 || pi_.selected;
 256
 257         if (all_sel) {
 258                 Font copy = font;
 259                 copy.fontInfo().setPaintColor(Color_selectiontext);
 260                 x_ += pi_.pain.text(int(x_), yo_, str, copy);
 261         } else if (change.changed()) {
 262                 Font copy = font;
 263                 copy.fontInfo().setPaintColor(change.color());
 264                 x_ += pi_.pain.text(int(x_), yo_, str, copy);
 265         } else if (!some_sel) {
 266                 x_ += pi_.pain.text(int(x_), yo_, str, font);
 267         } else {
 268                 x_ += pi_.pain.text(int(x_), yo_, str, font, Color_selectiontext,
 269                                     max(row_.sel_beg, start_pos) - start_pos,
 270                                     min(row_.sel_end, end_pos) - start_pos);
 271         }
 272 }
 273
 274
 275 void RowPainter::paintFromPos(pos_type & vpos, bool changed)
 276 {
 277         pos_type pos = bidi_.vis2log(vpos);
 278         pos_type start_pos = pos;
 279         // first character
 280         docstring str;
 281         str.reserve(100);
 282         char_type const c = par_.getChar(pos);
 283         str.push_back(c);
 284
 285         double const orig_x = x_;
 286
 287         Font const font = text_metrics_.displayFont(pit_, pos);
 288         FontSpan const font_span = par_.fontSpan(pos);
 289         // Track-change status.
 290         Change const & change_running = par_.lookupChange(pos);
 291
 292         // collect as much similar chars as we can
 293         pos_type const end = row_.endpos();
 294         for (++vpos ; vpos < end ; ++vpos) {
 295                 pos = bidi_.vis2log(vpos);
 296
 297                 if (!font_span.contains(pos))
 298                         break;
 299
 300                 Change const & change = par_.lookupChange(pos);
 301                 if (!change_running.isSimilarTo(change))
 302                         // Track change type or author has changed.
 303                         break;
 304
 305                 char_type const c = par_.getChar(pos);
 306
 307                 if (c == '\t')
 308                         break;
 309
 310                 if (!isPrintableNonspace(c))
 311                         break;
 312
 313                 str.push_back(c);
 314         }
 315
 316         // Make pos point to the last character in the string.
 317         // Using "pos = bidi_.vis2log(vpos)" does not work for some reason.
 318         if (vpos < end)
 319                 pos = bidi_.vis2log(vpos - 1);
 320
 321         // Now make pos point to the position _after_ the string.
 322         // Using vis2log for that is not a good idea in general, we
 323         // want logical ordering.
 324         if (font.isVisibleRightToLeft())
 325                 --pos;
 326         else
 327                 ++pos;
 328
 329         if (str[0] == '\t')
 330                 str.replace(0,1,from_ascii("    "));
 331
 332         /* Because we do our own bidi, at this point the strings are
 333          * already in visual order. However, Qt also applies its own
 334          * bidi algorithm to strings that it paints to the screen.
 335          * Therefore, if we were to paint Hebrew/Arabic words as a
 336          * single string, the letters in the words would get reversed
 337          * again. In order to avoid that, we reverse our string.
 338          * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 339          * for an earlier thread on the subject
 340          */
 341         if (font.isVisibleRightToLeft()) {
 342                 reverse(str.begin(), str.end());
 343                 // If the string is reversed, the positions need to be adjusted
 344                 ++pos;
 345                 ++start_pos;
 346                 swap(start_pos, pos);
 347         }
 348
 349         // Actually paint the text, taking care about the selection
 350         paintTextAndSel(str, font, change_running, start_pos, pos);
 351
 352         // The line that indicates word in a different language
 353         paintForeignMark(orig_x, font.language());
 354
 355         // Paint the spelling mark if needed.
 356         if (lyxrc.spellcheck_continuously && pi_.do_spellcheck
 357                 && par_.isMisspelled(start_pos)) {
 358                 paintMisspelledMark(orig_x, str, font, start_pos, changed);
 359         }
 360 }
 361
 362
 363 void RowPainter::paintChangeBar() const
 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() const
 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() const
 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) const
 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::paintTooLargeMarks(bool const left, bool const right) const
 470 {
 471         if (left)
 472                 pi_.pain.line(dotted_line_thickness_, yo_ - row_.ascent(),
 473                                           dotted_line_thickness_, yo_ + row_.descent(),
 474                                           Color_scroll,
 475                                           Painter::line_onoffdash, dotted_line_thickness_);
 476         if (right) {
 477                 int const wwidth = pi_.base.bv->workWidth() - dotted_line_thickness_;
 478                 pi_.pain.line(wwidth, yo_ - row_.ascent(),
 479                                           wwidth, yo_ + row_.descent(),
 480                                           Color_scroll,
 481                                           Painter::line_onoffdash, dotted_line_thickness_);
 482         }
 483 }
 484
 485
 486 void RowPainter::paintFirst() const
 487 {
 488         BufferParams const & bparams = pi_.base.bv->buffer().params();
 489         Layout const & layout = par_.layout();
 490
 491         int y_top = 0;
 492
 493         // start of appendix?
 494         if (par_.params().startOfAppendix())
 495                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 496
 497         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 498                 && pit_ != 0) {
 499                 if (layout.latextype == LATEX_PARAGRAPH
 500                     && !par_.getDepth()) {
 501                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 502                 } else {
 503                         Layout const & playout = pars_[pit_ - 1].layout();
 504                         if (playout.latextype == LATEX_PARAGRAPH
 505                             && !pars_[pit_ - 1].getDepth()) {
 506                                 // is it right to use defskip here, too? (AS)
 507                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 508                         }
 509                 }
 510         }
 511
 512         bool const is_first =
 513                 text_.isFirstInSequence(pit_) || !layout.isParagraphGroup();
 514         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 515
 516         if (layout.labelIsInline()
 517                         && (layout.labeltype != LABEL_STATIC || is_first)) {
 518                 paintLabel();
 519         } else if (is_first && layout.labelIsAbove()) {
 520                 paintTopLevelLabel();
 521         }
 522 }
 523
 524
 525 void RowPainter::paintLabel() const
 526 {
 527         docstring const str = par_.labelString();
 528         if (str.empty())
 529                 return;
 530
 531         bool const is_rtl = text_.isRTL(par_);
 532         Layout const & layout = par_.layout();
 533         FontInfo const font = labelFont();
 534         FontMetrics const & fm = theFontMetrics(font);
 535         double x = x_;
 536
 537         if (is_rtl) {
 538                 x = width_ - leftMargin()
 539                         + fm.width(layout.labelsep);
 540         } else {
 541                 x = x_ - fm.width(layout.labelsep)
 542                         - fm.width(str);
 543         }
 544
 545         pi_.pain.text(int(x), yo_, str, font);
 546 }
 547
 548
 549 void RowPainter::paintTopLevelLabel() const
 550 {
 551         BufferParams const & bparams = pi_.base.bv->buffer().params();
 552         bool const is_rtl = text_.isRTL(par_);
 553         ParagraphParameters const & pparams = par_.params();
 554         Layout const & layout = par_.layout();
 555         FontInfo const font = labelFont();
 556         docstring const str = par_.labelString();
 557         if (str.empty())
 558                 return;
 559
 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         FontMetrics const & fm = theFontMetrics(font);
 567
 568         int const labeladdon = int(fm.maxHeight()
 569                 * layout.spacing.getValue() * spacing_val);
 570
 571         int maxdesc =
 572                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 573                 + (layout.labelbottomsep * defaultRowHeight()));
 574
 575         double x = x_;
 576         if (layout.labeltype == LABEL_CENTERED) {
 577                 if (is_rtl)
 578                         x = leftMargin();
 579                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 580                 x -= fm.width(str) / 2;
 581         } else if (is_rtl) {
 582                 x = width_ - leftMargin() -     fm.width(str);
 583         }
 584         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 585 }
 586
 587
 588 /** Check if the current paragraph is the last paragraph in a
 589     proof environment */
 590 static int getEndLabel(pit_type p, Text const & text)
 591 {
 592         ParagraphList const & pars = text.paragraphs();
 593         pit_type pit = p;
 594         depth_type par_depth = pars[p].getDepth();
 595         while (pit != pit_type(pars.size())) {
 596                 Layout const & layout = pars[pit].layout();
 597                 int const endlabeltype = layout.endlabeltype;
 598
 599                 if (endlabeltype != END_LABEL_NO_LABEL) {
 600                         if (p + 1 == pit_type(pars.size()))
 601                                 return endlabeltype;
 602
 603                         depth_type const next_depth =
 604                                 pars[p + 1].getDepth();
 605                         if (par_depth > next_depth ||
 606                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 607                                 return endlabeltype;
 608                         break;
 609                 }
 610                 if (par_depth == 0)
 611                         break;
 612                 pit = text.outerHook(pit);
 613                 if (pit != pit_type(pars.size()))
 614                         par_depth = pars[pit].getDepth();
 615         }
 616         return END_LABEL_NO_LABEL;
 617 }
 618
 619
 620 void RowPainter::paintLast()
 621 {
 622         bool const is_rtl = text_.isRTL(par_);
 623         int const endlabel = getEndLabel(pit_, text_);
 624
 625         // paint imaginary end-of-paragraph character
 626
 627         Change const & change = par_.lookupChange(par_.size());
 628         if (change.changed()) {
 629                 FontMetrics const & fm =
 630                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 631                 int const length = fm.maxAscent() / 2;
 632                 Color col = change.color();
 633
 634                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 635                            Painter::line_solid, 3);
 636
 637                 if (change.deleted()) {
 638                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 639                                 yo_ + 2, col, Painter::line_solid, 3);
 640                 } else {
 641                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 642                                 yo_ + 2, col, Painter::line_solid, 3);
 643                 }
 644         }
 645
 646         // draw an endlabel
 647
 648         switch (endlabel) {
 649         case END_LABEL_BOX:
 650         case END_LABEL_FILLED_BOX: {
 651                 FontInfo const font = labelFont();
 652                 FontMetrics const & fm = theFontMetrics(font);
 653                 int const size = int(0.75 * fm.maxAscent());
 654                 int const y = yo_ - size;
 655                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 656                 int x = is_rtl ? nestMargin() + changebarMargin()
 657                         : max_row_width - text_metrics_.rightMargin(pm_);
 658
 659                 // If needed, move the box a bit to avoid overlapping with text.
 660                 int const rem = max_row_width - row_.width();
 661                 if (rem <= 0)
 662                         x += is_rtl ? rem : - rem;
 663
 664                 if (endlabel == END_LABEL_BOX)
 665                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 666                 else
 667                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 668                 break;
 669         }
 670
 671         case END_LABEL_STATIC: {
 672                 FontInfo const font = labelFont();
 673                 FontMetrics const & fm = theFontMetrics(font);
 674                 docstring const & str = par_.layout().endlabelstring();
 675                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 676                 pi_.pain.text(int(x), yo_, str, font);
 677                 break;
 678         }
 679
 680         case END_LABEL_NO_LABEL:
 681                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 682                         docstring const s = docstring(1, char_type(0x00B6));
 683                         FontInfo f = FontInfo(text_.layoutFont(pit_));
 684                         f.setColor(Color_paragraphmarker);
 685                         pi_.pain.text(int(x_), yo_, s, f);
 686                         x_ += theFontMetrics(f).width(s);
 687                 }
 688                 break;
 689         }
 690 }
 691
 692
 693 void RowPainter::paintOnlyInsets()
 694 {
 695         CoordCache const & cache = pi_.base.bv->coordCache();
 696         pos_type const end = row_.endpos();
 697         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 698                 // If outer row has changed, nested insets are repaint completely.
 699                 Inset const * inset = par_.getInset(pos);
 700                 bool const nested_inset = inset &&
 701                                 ((inset->asInsetMath() &&
 702                                   !inset->asInsetMath()->asMacroTemplate())
 703                                  || inset->asInsetText()
 704                                  || inset->asInsetTabular());
 705                 if (!nested_inset)
 706                         continue;
 707                 if (x_ > pi_.base.bv->workWidth()
 708                     || !cache.getInsets().has(inset))
 709                         continue;
 710                 x_ = cache.getInsets().x(inset);
 711
 712                 bool const pi_selected = pi_.selected;
 713                 Cursor const & cur = pi_.base.bv->cursor();
 714                 if (cur.selection() && cur.text() == &text_
 715                           && cur.normalAnchor().text() == &text_)
 716                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 717                 paintInset(inset, pos);
 718                 pi_.selected = pi_selected;
 719         }
 720 }
 721
 722
 723 void RowPainter::paintText()
 724 {
 725         //LYXERR0("-------------------------------------------------------");
 726         pos_type const end = row_.endpos();
 727         // Spaces at logical line breaks in bidi text must be skipped during
 728         // painting. However, they may appear visually in the middle
 729         // of a row; they must be skipped, wherever they are...
 730         // * logically "abc_[HEBREW_\nHEBREW]"
 731         // * visually "abc_[_WERBEH\nWERBEH]"
 732         pos_type skipped_sep_vpos = -1;
 733         pos_type body_pos = par_.beginOfBody();
 734         if (body_pos > 0 &&
 735                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 736                 body_pos = 0;
 737         }
 738
 739         Layout const & layout = par_.layout();
 740
 741         Change change_running;
 742         int change_last_x = 0;
 743
 744         // check for possible inline completion
 745         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 746         pos_type inlineCompletionVPos = -1;
 747         if (inlineCompletionPos.inTexted()
 748             && inlineCompletionPos.text() == &text_
 749             && inlineCompletionPos.pit() == pit_
 750             && inlineCompletionPos.pos() - 1 >= row_.pos()
 751             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 752                 // draw logically behind the previous character
 753                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 754         }
 755
 756         // Use font span to speed things up, see below
 757         FontSpan font_span;
 758         Font font;
 759
 760         // If the last logical character is a separator, don't paint it, unless
 761         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 762         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 763                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 764
 765         for (pos_type vpos = row_.pos(); vpos < end; ) {
 766                 if (x_ > pi_.base.bv->workWidth())
 767                         break;
 768
 769                 // Skip the separator at the logical end of the row
 770                 if (vpos == skipped_sep_vpos) {
 771                         ++vpos;
 772                         continue;
 773                 }
 774
 775                 pos_type const pos = bidi_.vis2log(vpos);
 776
 777                 if (pos >= par_.size()) {
 778                         ++vpos;
 779                         continue;
 780                 }
 781
 782                 // Use font span to speed things up, see above
 783                 if (!font_span.contains(pos)) {
 784                         font_span = par_.fontSpan(pos);
 785                         font = text_metrics_.displayFont(pit_, pos);
 786
 787                         // split font span if inline completion is inside
 788                         if (inlineCompletionVPos != -1
 789                             && font_span.contains(inlineCompletionPos.pos()))
 790                                 font_span.last = inlineCompletionPos.pos();
 791                 }
 792
 793                 // Note that this value will only be used in
 794                 // situations where no ligature of composition of
 795                 // characters is needed. (see comments in uses of width_pos).
 796                 const int width_pos = pm_.singleWidth(pos, font);
 797
 798                 Change const & change = par_.lookupChange(pos);
 799                 if (change.changed() && !change_running.changed()) {
 800                         change_running = change;
 801                         change_last_x = int(x_);
 802                 }
 803
 804                 Inset const * inset = par_.getInset(pos);
 805                 bool const highly_editable_inset = inset
 806                         && inset->editable();
 807
 808                 // If we reach the end of a change or if the author changes, paint it.
 809                 // We also don't paint across things like tables
 810                 if (change_running.changed() && (highly_editable_inset
 811                         || !change.changed() || !change_running.isSimilarTo(change))) {
 812                         // Calculate 1/3 height of the buffer's default font
 813                         FontMetrics const & fm
 814                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 815                         int const y_bar = change_running.deleted() ?
 816                                 yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 817                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 818                                 change_running.color(), Painter::line_solid, solid_line_thickness_);
 819
 820                         // Change might continue with a different author or type
 821                         if (change.changed() && !highly_editable_inset) {
 822                                 change_running = change;
 823                                 change_last_x = int(x_);
 824                         } else
 825                                 change_running.setUnchanged();
 826                 }
 827
 828                 if (body_pos > 0 && pos == body_pos - 1) {
 829                         int const lwidth = theFontMetrics(labelFont())
 830                                 .width(layout.labelsep);
 831
 832                         // width_pos is either the width of a space or an inset
 833                         x_ += row_.label_hfill + lwidth - width_pos;
 834                 }
 835
 836                 // Is the inline completion in front of character?
 837                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 838                         paintInlineCompletion(font);
 839
 840                 if (par_.isSeparator(pos)) {
 841                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 842                         double const orig_x = x_;
 843                         // width_pos is the width of a space
 844                         double separator_width = width_pos;
 845                         if (pos >= body_pos)
 846                                 separator_width += row_.separator;
 847                         paintSeparator(orig_x, separator_width, orig_font.fontInfo());
 848                         paintForeignMark(orig_x, orig_font.language());
 849                         ++vpos;
 850
 851                 } else if (inset) {
 852                         // If outer row has changed, nested insets are repaint completely.
 853                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 854
 855                         bool const pi_selected = pi_.selected;
 856                         Cursor const & cur = pi_.base.bv->cursor();
 857                         if (cur.selection() && cur.text() == &text_
 858                                   && cur.normalAnchor().text() == &text_)
 859                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 860                         paintInset(inset, pos);
 861                         pi_.selected = pi_selected;
 862                         ++vpos;
 863
 864                 } else {
 865                         // paint as many characters as possible.
 866                         paintFromPos(vpos, change_running.changed());
 867                 }
 868
 869                 // Is the inline completion after character?
 870                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 871                         paintInlineCompletion(font);
 872         }
 873
 874         // if we reach the end of a struck out range, paint it
 875         if (change_running.changed()) {
 876                 FontMetrics const & fm
 877                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 878                 int const y_bar = change_running.deleted() ?
 879                                 yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 880                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 881                         change_running.color(), Painter::line_solid, solid_line_thickness_);
 882                 change_running.setUnchanged();
 883         }
 884 }
 885
 886
 887 void RowPainter::paintSelection() const
 888 {
 889         if (!row_.selection())
 890                 return;
 891         Cursor const & curs = pi_.base.bv->cursor();
 892         DocIterator beg = curs.selectionBegin();
 893         beg.pit() = pit_;
 894         beg.pos() = row_.sel_beg;
 895
 896         DocIterator end = curs.selectionEnd();
 897         end.pit() = pit_;
 898         end.pos() = row_.sel_end;
 899
 900         bool const begin_boundary = beg.pos() >= row_.endpos();
 901         bool const end_boundary = row_.sel_end == row_.endpos();
 902
 903         DocIterator cur = beg;
 904         cur.boundary(begin_boundary);
 905         int x1 = text_metrics_.cursorX(beg.top(), begin_boundary);
 906         int x2 = text_metrics_.cursorX(end.top(), end_boundary);
 907         int const y1 = yo_ - row_.ascent();
 908         int const y2 = y1 + row_.height();
 909
 910         int const rm = text_.isMainText() ? pi_.base.bv->rightMargin() : 0;
 911         int const lm = text_.isMainText() ? pi_.base.bv->leftMargin() : 0;
 912
 913         // draw the margins
 914         if (row_.begin_margin_sel) {
 915                 if (text_.isRTL(beg.paragraph())) {
 916                         pi_.pain.fillRectangle(int(xo_ + x1), y1,
 917                                 text_metrics_.width() - rm - x1, y2 - y1, Color_selection);
 918                 } else {
 919                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x1 - lm, y2 - y1,
 920                                 Color_selection);
 921                 }
 922         }
 923
 924         if (row_.end_margin_sel) {
 925                 if (text_.isRTL(beg.paragraph())) {
 926                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x2 - lm, y2 - y1,
 927                                 Color_selection);
 928                 } else {
 929                         pi_.pain.fillRectangle(int(xo_ + x2), y1, text_metrics_.width() - rm - x2,
 930                                 y2 - y1, Color_selection);
 931                 }
 932         }
 933
 934         // if we are on a boundary from the beginning, it's probably
 935         // a RTL boundary and we jump to the other side directly as this
 936         // segement is 0-size and confuses the logic below
 937         if (cur.boundary())
 938                 cur.boundary(false);
 939
 940         // go through row and draw from RTL boundary to RTL boundary
 941         while (cur < end) {
 942                 bool draw_now = false;
 943
 944                 // simplified cursorForward code below which does not
 945                 // descend into insets and which does not go into the
 946                 // next line. Compare the logic with the original cursorForward
 947
 948                 // if left of boundary -> just jump to right side, but
 949                 // for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
 950                 if (cur.boundary()) {
 951                         cur.boundary(false);
 952                 }       else if (text_metrics_.isRTLBoundary(cur.pit(), cur.pos() + 1)) {
 953                         // in front of RTL boundary -> Stay on this side of the boundary
 954                         // because:  ab|cDDEEFFghi -> abc|DDEEFFghi
 955                         ++cur.pos();
 956                         cur.boundary(true);
 957                         draw_now = true;
 958                 } else {
 959                         // move right
 960                         ++cur.pos();
 961
 962                         // line end?
 963                         if (cur.pos() == row_.endpos())
 964                                 cur.boundary(true);
 965                 }
 966
 967                 if (x1 == -1) {
 968                         // the previous segment was just drawn, now the next starts
 969                         x1 = text_metrics_.cursorX(cur.top(), cur.boundary());
 970                 }
 971
 972                 if (!(cur < end) || draw_now) {
 973                         x2 = text_metrics_.cursorX(cur.top(), cur.boundary());
 974                         pi_.pain.fillRectangle(int(xo_ + min(x1, x2)), y1, abs(x2 - x1),
 975                                 y2 - y1, Color_selection);
 976
 977                         // reset x1, so it is set again next round (which will be on the
 978                         // right side of a boundary or at the selection end)
 979                         x1 = -1;
 980                 }
 981         }
 982 }
 983
 984
 985 void RowPainter::paintInlineCompletion(Font const & font)
 986 {
 987         docstring completion = pi_.base.bv->inlineCompletion();
 988         FontInfo f = font.fontInfo();
 989         bool rtl = font.isRightToLeft();
 990
 991         // draw the unique and the non-unique completion part
 992         // Note: this is not time-critical as it is
 993         // only done once per screen.
 994         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 995         docstring s1 = completion.substr(0, uniqueTo);
 996         docstring s2 = completion.substr(uniqueTo);
 997         ColorCode c1 = Color_inlinecompletion;
 998         ColorCode c2 = Color_nonunique_inlinecompletion;
 999
1000         // right to left?
1001         if (rtl) {
1002                 swap(s1, s2);
1003                 swap(c1, c2);
1004         }
1005
1006         if (!s1.empty()) {
1007                 f.setColor(c1);
1008                 pi_.pain.text(int(x_), yo_, s1, f);
1009                 x_ += theFontMetrics(font).width(s1);
1010         }
1011
1012         if (!s2.empty()) {
1013                 f.setColor(c2);
1014                 pi_.pain.text(int(x_), yo_, s2, f);
1015                 x_ += theFontMetrics(font).width(s2);
1016         }
1017 }
1018
1019 } // namespace lyx