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, min(range.last - start_pos + 1,
 234                                            pos_type(str.length())),
 235                                   font.isVisibleRightToLeft());
 236                 if (x1 > x2)
 237                         swap(x1, x2);
 238
 239                 pi_.pain.line(int(orig_x) + x1, y, int(orig_x) + x2, y,
 240                               Color_error,
 241                               Painter::line_onoffdash, dotted_line_thickness_);
 242                 pos = range.last + 1;
 243         }
 244 }
 245
 246
 247 void RowPainter::paintTextAndSel(docstring const & str, Font const & font,
 248                                  Change const & change,
 249                                  pos_type start_pos, pos_type end_pos)
 250 {
 251         // at least part of text selected?
 252         bool const some_sel = (end_pos >= row_.sel_beg && start_pos < row_.sel_end)
 253                 || pi_.selected;
 254         // all the text selected?
 255         bool const all_sel = (start_pos >= row_.sel_beg && end_pos < row_.sel_end)
 256                 || pi_.selected;
 257
 258         if (all_sel) {
 259                 Font copy = font;
 260                 copy.fontInfo().setPaintColor(Color_selectiontext);
 261                 x_ += pi_.pain.text(int(x_), yo_, str, copy);
 262         } else if (change.changed()) {
 263                 Font copy = font;
 264                 copy.fontInfo().setPaintColor(change.color());
 265                 x_ += pi_.pain.text(int(x_), yo_, str, copy);
 266         } else if (!some_sel) {
 267                 x_ += pi_.pain.text(int(x_), yo_, str, font);
 268         } else {
 269                 x_ += pi_.pain.text(int(x_), yo_, str, font, Color_selectiontext,
 270                                     max(row_.sel_beg, start_pos) - start_pos,
 271                                     min(row_.sel_end, end_pos) - start_pos);
 272         }
 273 }
 274
 275
 276 void RowPainter::paintFromPos(pos_type & vpos, bool changed)
 277 {
 278         pos_type pos = bidi_.vis2log(vpos);
 279         pos_type start_pos = pos;
 280         // first character
 281         docstring str;
 282         str.reserve(100);
 283         char_type const c = par_.getChar(pos);
 284         str.push_back(c);
 285
 286         double const orig_x = x_;
 287
 288         Font const font = text_metrics_.displayFont(pit_, pos);
 289         FontSpan const font_span = par_.fontSpan(pos);
 290         // Track-change status.
 291         Change const & change_running = par_.lookupChange(pos);
 292
 293         // collect as much similar chars as we can
 294         pos_type const end = row_.endpos();
 295         for (++vpos ; vpos < end ; ++vpos) {
 296                 pos = bidi_.vis2log(vpos);
 297
 298                 if (!font_span.contains(pos))
 299                         break;
 300
 301                 Change const & change = par_.lookupChange(pos);
 302                 if (!change_running.isSimilarTo(change))
 303                         // Track change type or author has changed.
 304                         break;
 305
 306                 char_type const c = par_.getChar(pos);
 307
 308                 if (c == '\t')
 309                         break;
 310
 311                 if (!isPrintableNonspace(c))
 312                         break;
 313
 314                 str.push_back(c);
 315         }
 316
 317         // Make pos point to the last character in the string.
 318         // Using "pos = bidi_.vis2log(vpos)" does not work for some reason.
 319         if (vpos < end)
 320                 pos = bidi_.vis2log(vpos - 1);
 321
 322         // Now make pos point to the position _after_ the string.
 323         // Using vis2log for that is not a good idea in general, we
 324         // want logical ordering.
 325         if (font.isVisibleRightToLeft())
 326                 --pos;
 327         else
 328                 ++pos;
 329
 330         if (str[0] == '\t')
 331                 str.replace(0,1,from_ascii("    "));
 332
 333         /* Because we do our own bidi, at this point the strings are
 334          * already in visual order. However, Qt also applies its own
 335          * bidi algorithm to strings that it paints to the screen.
 336          * Therefore, if we were to paint Hebrew/Arabic words as a
 337          * single string, the letters in the words would get reversed
 338          * again. In order to avoid that, we reverse our string.
 339          * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 340          * for an earlier thread on the subject
 341          */
 342         if (font.isVisibleRightToLeft()) {
 343                 reverse(str.begin(), str.end());
 344                 // If the string is reversed, the positions need to be adjusted
 345                 ++pos;
 346                 ++start_pos;
 347                 swap(start_pos, pos);
 348         }
 349
 350         // Actually paint the text, taking care about the selection
 351         paintTextAndSel(str, font, change_running, start_pos, pos);
 352
 353         // The line that indicates word in a different language
 354         paintForeignMark(orig_x, font.language());
 355
 356         // Paint the spelling mark if needed.
 357         if (lyxrc.spellcheck_continuously && pi_.do_spellcheck
 358                 && par_.isMisspelled(start_pos)) {
 359                 paintMisspelledMark(orig_x, str, font, start_pos, changed);
 360         }
 361 }
 362
 363
 364 void RowPainter::paintChangeBar() const
 365 {
 366         pos_type const start = row_.pos();
 367         pos_type end = row_.endpos();
 368
 369         if (par_.size() == end) {
 370                 // this is the last row of the paragraph;
 371                 // thus, we must also consider the imaginary end-of-par character
 372                 end++;
 373         }
 374
 375         if (start == end || !par_.isChanged(start, end))
 376                 return;
 377
 378         int const height = text_metrics_.isLastRow(pit_, row_)
 379                 ? row_.ascent()
 380                 : row_.height();
 381
 382         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 383 }
 384
 385
 386 void RowPainter::paintAppendix() const
 387 {
 388         // only draw the appendix frame once (for the main text)
 389         if (!par_.params().appendix() || !text_.isMainText())
 390                 return;
 391
 392         int y = yo_ - row_.ascent();
 393
 394         if (par_.params().startOfAppendix())
 395                 y += 2 * defaultRowHeight();
 396
 397         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 398         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 399 }
 400
 401
 402 void RowPainter::paintDepthBar() const
 403 {
 404         depth_type const depth = par_.getDepth();
 405
 406         if (depth <= 0)
 407                 return;
 408
 409         depth_type prev_depth = 0;
 410         if (!text_metrics_.isFirstRow(pit_, row_)) {
 411                 pit_type pit2 = pit_;
 412                 if (row_.pos() == 0)
 413                         --pit2;
 414                 prev_depth = pars_[pit2].getDepth();
 415         }
 416
 417         depth_type next_depth = 0;
 418         if (!text_metrics_.isLastRow(pit_, row_)) {
 419                 pit_type pit2 = pit_;
 420                 if (row_.endpos() >= pars_[pit2].size())
 421                         ++pit2;
 422                 next_depth = pars_[pit2].getDepth();
 423         }
 424
 425         for (depth_type i = 1; i <= depth; ++i) {
 426                 int const w = nestMargin() / 5;
 427                 int x = int(xo_) + w * i;
 428                 // only consider the changebar space if we're drawing outermost text
 429                 if (text_.isMainText())
 430                         x += changebarMargin();
 431
 432                 int const starty = yo_ - row_.ascent();
 433                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 434
 435                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 436
 437                 if (i > prev_depth)
 438                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 439                 if (i > next_depth)
 440                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 441         }
 442 }
 443
 444
 445 int RowPainter::paintAppendixStart(int y) const
 446 {
 447         FontInfo pb_font = sane_font;
 448         pb_font.setColor(Color_appendix);
 449         pb_font.decSize();
 450
 451         int w = 0;
 452         int a = 0;
 453         int d = 0;
 454
 455         docstring const label = _("Appendix");
 456         theFontMetrics(pb_font).rectText(label, w, a, d);
 457
 458         int const text_start = int(xo_ + (width_ - w) / 2);
 459         int const text_end = text_start + w;
 460
 461         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 462
 463         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 464         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 465
 466         return 3 * defaultRowHeight();
 467 }
 468
 469
 470 void RowPainter::paintTooLargeMarks(bool const left, bool const right) const
 471 {
 472         if (left)
 473                 pi_.pain.line(dotted_line_thickness_, yo_ - row_.ascent(),
 474                                           dotted_line_thickness_, yo_ + row_.descent(),
 475                                           Color_scroll,
 476                                           Painter::line_onoffdash, dotted_line_thickness_);
 477         if (right) {
 478                 int const wwidth = pi_.base.bv->workWidth() - dotted_line_thickness_;
 479                 pi_.pain.line(wwidth, yo_ - row_.ascent(),
 480                                           wwidth, yo_ + row_.descent(),
 481                                           Color_scroll,
 482                                           Painter::line_onoffdash, dotted_line_thickness_);
 483         }
 484 }
 485
 486
 487 void RowPainter::paintFirst() const
 488 {
 489         BufferParams const & bparams = pi_.base.bv->buffer().params();
 490         Layout const & layout = par_.layout();
 491
 492         int y_top = 0;
 493
 494         // start of appendix?
 495         if (par_.params().startOfAppendix())
 496                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 497
 498         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 499                 && pit_ != 0) {
 500                 if (layout.latextype == LATEX_PARAGRAPH
 501                     && !par_.getDepth()) {
 502                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 503                 } else {
 504                         Layout const & playout = pars_[pit_ - 1].layout();
 505                         if (playout.latextype == LATEX_PARAGRAPH
 506                             && !pars_[pit_ - 1].getDepth()) {
 507                                 // is it right to use defskip here, too? (AS)
 508                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 509                         }
 510                 }
 511         }
 512
 513         bool const is_first =
 514                 text_.isFirstInSequence(pit_) || !layout.isParagraphGroup();
 515         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 516
 517         if (layout.labelIsInline()
 518                         && (layout.labeltype != LABEL_STATIC || is_first)) {
 519                 paintLabel();
 520         } else if (is_first && layout.labelIsAbove()) {
 521                 paintTopLevelLabel();
 522         }
 523 }
 524
 525
 526 void RowPainter::paintLabel() const
 527 {
 528         docstring const str = par_.labelString();
 529         if (str.empty())
 530                 return;
 531
 532         bool const is_rtl = text_.isRTL(par_);
 533         Layout const & layout = par_.layout();
 534         FontInfo const font = labelFont();
 535         FontMetrics const & fm = theFontMetrics(font);
 536         double x = x_;
 537
 538         if (is_rtl) {
 539                 x = width_ - leftMargin()
 540                         + fm.width(layout.labelsep);
 541         } else {
 542                 x = x_ - fm.width(layout.labelsep)
 543                         - fm.width(str);
 544         }
 545
 546         pi_.pain.text(int(x), yo_, str, font);
 547 }
 548
 549
 550 void RowPainter::paintTopLevelLabel() const
 551 {
 552         BufferParams const & bparams = pi_.base.bv->buffer().params();
 553         bool const is_rtl = text_.isRTL(par_);
 554         ParagraphParameters const & pparams = par_.params();
 555         Layout const & layout = par_.layout();
 556         FontInfo const font = labelFont();
 557         docstring const str = par_.labelString();
 558         if (str.empty())
 559                 return;
 560
 561         double spacing_val = 1.0;
 562         if (!pparams.spacing().isDefault())
 563                 spacing_val = pparams.spacing().getValue();
 564         else
 565                 spacing_val = bparams.spacing().getValue();
 566
 567         FontMetrics const & fm = theFontMetrics(font);
 568
 569         int const labeladdon = int(fm.maxHeight()
 570                 * layout.spacing.getValue() * spacing_val);
 571
 572         int maxdesc =
 573                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 574                 + (layout.labelbottomsep * defaultRowHeight()));
 575
 576         double x = x_;
 577         if (layout.labeltype == LABEL_CENTERED) {
 578                 if (is_rtl)
 579                         x = leftMargin();
 580                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 581                 x -= fm.width(str) / 2;
 582         } else if (is_rtl) {
 583                 x = width_ - leftMargin() -     fm.width(str);
 584         }
 585         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 586 }
 587
 588
 589 /** Check if the current paragraph is the last paragraph in a
 590     proof environment */
 591 static int getEndLabel(pit_type p, Text const & text)
 592 {
 593         ParagraphList const & pars = text.paragraphs();
 594         pit_type pit = p;
 595         depth_type par_depth = pars[p].getDepth();
 596         while (pit != pit_type(pars.size())) {
 597                 Layout const & layout = pars[pit].layout();
 598                 int const endlabeltype = layout.endlabeltype;
 599
 600                 if (endlabeltype != END_LABEL_NO_LABEL) {
 601                         if (p + 1 == pit_type(pars.size()))
 602                                 return endlabeltype;
 603
 604                         depth_type const next_depth =
 605                                 pars[p + 1].getDepth();
 606                         if (par_depth > next_depth ||
 607                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 608                                 return endlabeltype;
 609                         break;
 610                 }
 611                 if (par_depth == 0)
 612                         break;
 613                 pit = text.outerHook(pit);
 614                 if (pit != pit_type(pars.size()))
 615                         par_depth = pars[pit].getDepth();
 616         }
 617         return END_LABEL_NO_LABEL;
 618 }
 619
 620
 621 void RowPainter::paintLast()
 622 {
 623         bool const is_rtl = text_.isRTL(par_);
 624         int const endlabel = getEndLabel(pit_, text_);
 625
 626         // paint imaginary end-of-paragraph character
 627
 628         Change const & change = par_.lookupChange(par_.size());
 629         if (change.changed()) {
 630                 FontMetrics const & fm =
 631                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 632                 int const length = fm.maxAscent() / 2;
 633                 Color col = change.color();
 634
 635                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 636                            Painter::line_solid, 3);
 637
 638                 if (change.deleted()) {
 639                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 640                                 yo_ + 2, col, Painter::line_solid, 3);
 641                 } else {
 642                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 643                                 yo_ + 2, col, Painter::line_solid, 3);
 644                 }
 645         }
 646
 647         // draw an endlabel
 648
 649         switch (endlabel) {
 650         case END_LABEL_BOX:
 651         case END_LABEL_FILLED_BOX: {
 652                 FontInfo const font = labelFont();
 653                 FontMetrics const & fm = theFontMetrics(font);
 654                 int const size = int(0.75 * fm.maxAscent());
 655                 int const y = yo_ - size;
 656                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 657                 int x = is_rtl ? nestMargin() + changebarMargin()
 658                         : max_row_width - text_metrics_.rightMargin(pm_);
 659
 660                 // If needed, move the box a bit to avoid overlapping with text.
 661                 int const rem = max_row_width - row_.width();
 662                 if (rem <= 0)
 663                         x += is_rtl ? rem : - rem;
 664
 665                 if (endlabel == END_LABEL_BOX)
 666                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 667                 else
 668                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 669                 break;
 670         }
 671
 672         case END_LABEL_STATIC: {
 673                 FontInfo const font = labelFont();
 674                 FontMetrics const & fm = theFontMetrics(font);
 675                 docstring const & str = par_.layout().endlabelstring();
 676                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 677                 pi_.pain.text(int(x), yo_, str, font);
 678                 break;
 679         }
 680
 681         case END_LABEL_NO_LABEL:
 682                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 683                         docstring const s = docstring(1, char_type(0x00B6));
 684                         FontInfo f = FontInfo(text_.layoutFont(pit_));
 685                         f.setColor(Color_paragraphmarker);
 686                         pi_.pain.text(int(x_), yo_, s, f);
 687                         x_ += theFontMetrics(f).width(s);
 688                 }
 689                 break;
 690         }
 691 }
 692
 693
 694 void RowPainter::paintOnlyInsets()
 695 {
 696         CoordCache const & cache = pi_.base.bv->coordCache();
 697         pos_type const end = row_.endpos();
 698         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 699                 // If outer row has changed, nested insets are repaint completely.
 700                 Inset const * inset = par_.getInset(pos);
 701                 bool const nested_inset = inset &&
 702                                 ((inset->asInsetMath() &&
 703                                   !inset->asInsetMath()->asMacroTemplate())
 704                                  || inset->asInsetText()
 705                                  || inset->asInsetTabular());
 706                 if (!nested_inset)
 707                         continue;
 708                 if (x_ > pi_.base.bv->workWidth()
 709                     || !cache.getInsets().has(inset))
 710                         continue;
 711                 x_ = cache.getInsets().x(inset);
 712
 713                 bool const pi_selected = pi_.selected;
 714                 Cursor const & cur = pi_.base.bv->cursor();
 715                 if (cur.selection() && cur.text() == &text_
 716                           && cur.normalAnchor().text() == &text_)
 717                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 718                 paintInset(inset, pos);
 719                 pi_.selected = pi_selected;
 720         }
 721 }
 722
 723
 724 void RowPainter::paintText()
 725 {
 726         //LYXERR0("-------------------------------------------------------");
 727         pos_type const end = row_.endpos();
 728         // Spaces at logical line breaks in bidi text must be skipped during
 729         // painting. However, they may appear visually in the middle
 730         // of a row; they must be skipped, wherever they are...
 731         // * logically "abc_[HEBREW_\nHEBREW]"
 732         // * visually "abc_[_WERBEH\nWERBEH]"
 733         pos_type skipped_sep_vpos = -1;
 734         pos_type body_pos = par_.beginOfBody();
 735         if (body_pos > 0 &&
 736                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 737                 body_pos = 0;
 738         }
 739
 740         Layout const & layout = par_.layout();
 741
 742         Change change_running;
 743         int change_last_x = 0;
 744
 745         // check for possible inline completion
 746         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 747         pos_type inlineCompletionVPos = -1;
 748         if (inlineCompletionPos.inTexted()
 749             && inlineCompletionPos.text() == &text_
 750             && inlineCompletionPos.pit() == pit_
 751             && inlineCompletionPos.pos() - 1 >= row_.pos()
 752             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 753                 // draw logically behind the previous character
 754                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 755         }
 756
 757         // Use font span to speed things up, see below
 758         FontSpan font_span;
 759         Font font;
 760
 761         // If the last logical character is a separator, don't paint it, unless
 762         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 763         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 764                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 765
 766         for (pos_type vpos = row_.pos(); vpos < end; ) {
 767                 if (x_ > pi_.base.bv->workWidth())
 768                         break;
 769
 770                 // Skip the separator at the logical end of the row
 771                 if (vpos == skipped_sep_vpos) {
 772                         ++vpos;
 773                         continue;
 774                 }
 775
 776                 pos_type const pos = bidi_.vis2log(vpos);
 777
 778                 if (pos >= par_.size()) {
 779                         ++vpos;
 780                         continue;
 781                 }
 782
 783                 // Use font span to speed things up, see above
 784                 if (!font_span.contains(pos)) {
 785                         font_span = par_.fontSpan(pos);
 786                         font = text_metrics_.displayFont(pit_, pos);
 787
 788                         // split font span if inline completion is inside
 789                         if (inlineCompletionVPos != -1
 790                             && font_span.contains(inlineCompletionPos.pos()))
 791                                 font_span.last = inlineCompletionPos.pos();
 792                 }
 793
 794                 // Note that this value will only be used in
 795                 // situations where no ligature of composition of
 796                 // characters is needed. (see comments in uses of width_pos).
 797                 const int width_pos = pm_.singleWidth(pos, font);
 798
 799                 Change const & change = par_.lookupChange(pos);
 800                 if (change.changed() && !change_running.changed()) {
 801                         change_running = change;
 802                         change_last_x = int(x_);
 803                 }
 804
 805                 Inset const * inset = par_.getInset(pos);
 806                 bool const highly_editable_inset = inset
 807                         && inset->editable();
 808
 809                 // If we reach the end of a change or if the author changes, paint it.
 810                 // We also don't paint across things like tables
 811                 if (change_running.changed() && (highly_editable_inset
 812                         || !change.changed() || !change_running.isSimilarTo(change))) {
 813                         // Calculate 1/3 height of the buffer's default font
 814                         FontMetrics const & fm
 815                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 816                         int const y_bar = change_running.deleted() ?
 817                                 yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 818                         pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 819                                 change_running.color(), Painter::line_solid, solid_line_thickness_);
 820
 821                         // Change might continue with a different author or type
 822                         if (change.changed() && !highly_editable_inset) {
 823                                 change_running = change;
 824                                 change_last_x = int(x_);
 825                         } else
 826                                 change_running.setUnchanged();
 827                 }
 828
 829                 if (body_pos > 0 && pos == body_pos - 1) {
 830                         int const lwidth = theFontMetrics(labelFont())
 831                                 .width(layout.labelsep);
 832
 833                         // width_pos is either the width of a space or an inset
 834                         x_ += row_.label_hfill + lwidth - width_pos;
 835                 }
 836
 837                 // Is the inline completion in front of character?
 838                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 839                         paintInlineCompletion(font);
 840
 841                 if (par_.isSeparator(pos)) {
 842                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 843                         double const orig_x = x_;
 844                         // width_pos is the width of a space
 845                         double separator_width = width_pos;
 846                         if (pos >= body_pos)
 847                                 separator_width += row_.separator;
 848                         paintSeparator(orig_x, separator_width, orig_font.fontInfo());
 849                         paintForeignMark(orig_x, orig_font.language());
 850                         ++vpos;
 851
 852                 } else if (inset) {
 853                         // If outer row has changed, nested insets are repaint completely.
 854                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 855
 856                         bool const pi_selected = pi_.selected;
 857                         Cursor const & cur = pi_.base.bv->cursor();
 858                         if (cur.selection() && cur.text() == &text_
 859                                   && cur.normalAnchor().text() == &text_)
 860                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 861                         paintInset(inset, pos);
 862                         pi_.selected = pi_selected;
 863                         ++vpos;
 864
 865                 } else {
 866                         // paint as many characters as possible.
 867                         paintFromPos(vpos, change_running.changed());
 868                 }
 869
 870                 // Is the inline completion after character?
 871                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 872                         paintInlineCompletion(font);
 873         }
 874
 875         // if we reach the end of a struck out range, paint it
 876         if (change_running.changed()) {
 877                 FontMetrics const & fm
 878                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 879                 int const y_bar = change_running.deleted() ?
 880                                 yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 881                 pi_.pain.line(change_last_x, y_bar, int(x_), y_bar,
 882                         change_running.color(), Painter::line_solid, solid_line_thickness_);
 883                 change_running.setUnchanged();
 884         }
 885 }
 886
 887
 888 void RowPainter::paintSelection() const
 889 {
 890         if (!row_.selection())
 891                 return;
 892         Cursor const & curs = pi_.base.bv->cursor();
 893         DocIterator beg = curs.selectionBegin();
 894         beg.pit() = pit_;
 895         beg.pos() = row_.sel_beg;
 896
 897         DocIterator end = curs.selectionEnd();
 898         end.pit() = pit_;
 899         end.pos() = row_.sel_end;
 900
 901         bool const begin_boundary = beg.pos() >= row_.endpos();
 902         bool const end_boundary = row_.sel_end == row_.endpos();
 903
 904         DocIterator cur = beg;
 905         cur.boundary(begin_boundary);
 906         int x1 = text_metrics_.cursorX(beg.top(), begin_boundary);
 907         int x2 = text_metrics_.cursorX(end.top(), end_boundary);
 908         int const y1 = yo_ - row_.ascent();
 909         int const y2 = y1 + row_.height();
 910
 911         int const rm = text_.isMainText() ? pi_.base.bv->rightMargin() : 0;
 912         int const lm = text_.isMainText() ? pi_.base.bv->leftMargin() : 0;
 913
 914         // draw the margins
 915         if (row_.begin_margin_sel) {
 916                 if (text_.isRTL(beg.paragraph())) {
 917                         pi_.pain.fillRectangle(int(xo_ + x1), y1,
 918                                 text_metrics_.width() - rm - x1, y2 - y1, Color_selection);
 919                 } else {
 920                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x1 - lm, y2 - y1,
 921                                 Color_selection);
 922                 }
 923         }
 924
 925         if (row_.end_margin_sel) {
 926                 if (text_.isRTL(beg.paragraph())) {
 927                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x2 - lm, y2 - y1,
 928                                 Color_selection);
 929                 } else {
 930                         pi_.pain.fillRectangle(int(xo_ + x2), y1, text_metrics_.width() - rm - x2,
 931                                 y2 - y1, Color_selection);
 932                 }
 933         }
 934
 935         // if we are on a boundary from the beginning, it's probably
 936         // a RTL boundary and we jump to the other side directly as this
 937         // segement is 0-size and confuses the logic below
 938         if (cur.boundary())
 939                 cur.boundary(false);
 940
 941         // go through row and draw from RTL boundary to RTL boundary
 942         while (cur < end) {
 943                 bool draw_now = false;
 944
 945                 // simplified cursorForward code below which does not
 946                 // descend into insets and which does not go into the
 947                 // next line. Compare the logic with the original cursorForward
 948
 949                 // if left of boundary -> just jump to right side, but
 950                 // for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
 951                 if (cur.boundary()) {
 952                         cur.boundary(false);
 953                 }       else if (text_metrics_.isRTLBoundary(cur.pit(), cur.pos() + 1)) {
 954                         // in front of RTL boundary -> Stay on this side of the boundary
 955                         // because:  ab|cDDEEFFghi -> abc|DDEEFFghi
 956                         ++cur.pos();
 957                         cur.boundary(true);
 958                         draw_now = true;
 959                 } else {
 960                         // move right
 961                         ++cur.pos();
 962
 963                         // line end?
 964                         if (cur.pos() == row_.endpos())
 965                                 cur.boundary(true);
 966                 }
 967
 968                 if (x1 == -1) {
 969                         // the previous segment was just drawn, now the next starts
 970                         x1 = text_metrics_.cursorX(cur.top(), cur.boundary());
 971                 }
 972
 973                 if (!(cur < end) || draw_now) {
 974                         x2 = text_metrics_.cursorX(cur.top(), cur.boundary());
 975                         pi_.pain.fillRectangle(int(xo_ + min(x1, x2)), y1, abs(x2 - x1),
 976                                 y2 - y1, Color_selection);
 977
 978                         // reset x1, so it is set again next round (which will be on the
 979                         // right side of a boundary or at the selection end)
 980                         x1 = -1;
 981                 }
 982         }
 983 }
 984
 985
 986 void RowPainter::paintInlineCompletion(Font const & font)
 987 {
 988         docstring completion = pi_.base.bv->inlineCompletion();
 989         FontInfo f = font.fontInfo();
 990         bool rtl = font.isRightToLeft();
 991
 992         // draw the unique and the non-unique completion part
 993         // Note: this is not time-critical as it is
 994         // only done once per screen.
 995         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 996         docstring s1 = completion.substr(0, uniqueTo);
 997         docstring s2 = completion.substr(uniqueTo);
 998         ColorCode c1 = Color_inlinecompletion;
 999         ColorCode c2 = Color_nonunique_inlinecompletion;
1000
1001         // right to left?
1002         if (rtl) {
1003                 swap(s1, s2);
1004                 swap(c1, c2);
1005         }
1006
1007         if (!s1.empty()) {
1008                 f.setColor(c1);
1009                 pi_.pain.text(int(x_), yo_, s1, f);
1010                 x_ += theFontMetrics(font).width(s1);
1011         }
1012
1013         if (!s2.empty()) {
1014                 f.setColor(c2);
1015                 pi_.pain.text(int(x_), yo_, s2, f);
1016                 x_ += theFontMetrics(font).width(s2);
1017         }
1018 }
1019
1020 } // namespace lyx