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         pos_type start_pos = pos;
 168         // first character
 169         char_type c = par_.getChar(pos);
 170         docstring str;
 171         str.reserve(100);
 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                 if (c == '(')
 183                         c = ')';
 184                 else if (c == ')')
 185                         c = '(';
 186         }
 187         str.push_back(c);
 188
 189         FontSpan const font_span = par_.fontSpan(pos);
 190         // Track-change status.
 191         Change const & change_running = par_.lookupChange(pos);
 192         // spelling correct?
 193         bool const spell_state =
 194                 lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 195
 196         // collect as much similar chars as we can
 197         pos_type const end = row_.endpos();
 198         for (++vpos ; vpos < end ; ++vpos) {
 199                 pos = bidi_.vis2log(vpos);
 200
 201                 if (!font_span.inside(pos))
 202                         break;
 203
 204                 bool const new_spell_state =
 205                         lyxrc.spellcheck_continuously && par_.isMisspelled(pos);
 206                 if (new_spell_state != spell_state)
 207                         // Spell checker state changed here.
 208                         break;
 209
 210                 Change const & change = par_.lookupChange(pos);
 211                 if (!change_running.isSimilarTo(change))
 212                         // Track change type or author has changed.
 213                         break;
 214
 215                 char_type c = par_.getChar(pos);
 216
 217                 if (c == '\t')
 218                         break;
 219
 220                 if (!isPrintableNonspace(c))
 221                         break;
 222
 223                 // FIXME: Why only round brackets and why the difference to
 224                 // Hebrew? See also Paragraph::getUChar
 225                 if (swap_paren) {
 226                         if (c == '(')
 227                                 c = ')';
 228                         else if (c == ')')
 229                                 c = '(';
 230                 }
 231
 232                 str.push_back(c);
 233         }
 234
 235         // Make pos point to the last character in the string.
 236         // Using "pos = bidi_.vis2log(vpos)" does not work for some reason.
 237         if (vpos < end)
 238                 pos = bidi_.vis2log(vpos - 1);
 239
 240         // Now make pos point to the position _after_ the string.
 241         // Using vis2log for that is not a good idea in general, we
 242         // want logical ordering.
 243         if (font.isVisibleRightToLeft())
 244                 --pos;
 245         else
 246                 ++pos;
 247
 248         if (str[0] == '\t')
 249                 str.replace(0,1,from_ascii("    "));
 250
 251         /* Because we do our own bidi, at this point the strings are
 252          * already in visual order. However, Qt also applies its own
 253          * bidi algorithm to strings that it paints to the screen.
 254          * Therefore, if we were to paint Hebrew/Arabic words as a
 255          * single string, the letters in the words would get reversed
 256          * again. In order to avoid that, we force LTR drawing.
 257          * See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
 258          * for an earlier thread on the subject
 259          */
 260         if (font.isVisibleRightToLeft()) {
 261                 reverse(str.begin(), str.end());
 262                 // If the string is reversed, the positions need to be adjusted
 263                 ++pos;
 264                 ++start_pos;
 265                 swap(start_pos, pos);
 266         }
 267
 268         // at least part of text selected?
 269         bool const some_sel = (pos >= row_.sel_beg && start_pos < row_.sel_end)
 270                 || pi_.selected;
 271         // all the text selected?
 272         bool const all_sel = (start_pos >= row_.sel_beg && pos < row_.sel_end)
 273                 || pi_.selected;
 274
 275         if (all_sel) {
 276                 Font copy = font;
 277                 copy.fontInfo().setPaintColor(Color_selectiontext);
 278                 x_ += pi_.pain.text(int(x_), yo_, str, copy);
 279         } else if (change_running.changed()) {
 280                 Font copy = font;
 281                 copy.fontInfo().setPaintColor(change_running.color());
 282                 x_ += pi_.pain.text(int(x_), yo_, str, copy);
 283         } else if (!some_sel) {
 284                 x_ += pi_.pain.text(int(x_), yo_, str, font);
 285         } else {
 286                 x_ += pi_.pain.text(int(x_), yo_, str, font, Color_selectiontext,
 287                                     max(row_.sel_beg, start_pos) - start_pos,
 288                                     min(row_.sel_end, pos) - start_pos);
 289         }
 290 }
 291
 292
 293 void RowPainter::paintSeparator(double orig_x, double width,
 294         FontInfo const & font)
 295 {
 296         pi_.pain.textDecoration(font, int(orig_x), yo_, int(width));
 297         x_ += width;
 298 }
 299
 300
 301 void RowPainter::paintForeignMark(double orig_x, Language const * lang,
 302                 int desc)
 303 {
 304         if (!lyxrc.mark_foreign_language)
 305                 return;
 306         if (lang == latex_language)
 307                 return;
 308         if (lang == pi_.base.bv->buffer().params().language)
 309                 return;
 310
 311         int const y = yo_ + solid_line_offset_ + desc + int(solid_line_thickness_/2);
 312         pi_.pain.line(int(orig_x), y, int(x_), y, Color_language,
 313                 Painter::line_solid, solid_line_thickness_);
 314 }
 315
 316
 317 void RowPainter::paintMisspelledMark(double orig_x, bool changed)
 318 {
 319         // if changed the misspelled marker gets placed slightly lower than normal
 320         // to avoid drawing at the same vertical offset
 321         float const y = yo_ + solid_line_offset_ + solid_line_thickness_
 322                 + (changed ? solid_line_thickness_ + 1 : 0)
 323                 + dotted_line_offset_;
 324         pi_.pain.line(int(orig_x), int(y), int(x_), int(y), Color_error,
 325                 Painter::line_onoffdash, dotted_line_thickness_);
 326 }
 327
 328
 329 void RowPainter::paintFromPos(pos_type & vpos, bool changed)
 330 {
 331         pos_type const pos = bidi_.vis2log(vpos);
 332         Font const font = text_metrics_.displayFont(pit_, pos);
 333         double const orig_x = x_;
 334
 335         paintChars(vpos, font);
 336         paintForeignMark(orig_x, font.language());
 337
 338         // Paint the spelling mark if needed.
 339         if (lyxrc.spellcheck_continuously && par_.isMisspelled(pos)) {
 340                 // check for cursor position
 341                 // don't draw misspelled marker for words at cursor position
 342                 // we don't want to disturb the process of text editing
 343                 BufferView const * bv = pi_.base.bv;
 344                 DocIterator const nw = bv->cursor().newWord();
 345                 bool new_word = false;
 346                 if (!nw.empty() && par_.id() == nw.paragraph().id()) {
 347                         pos_type cpos = nw.pos();
 348                         if (cpos > 0 && cpos == par_.size() && !par_.isWordSeparator(cpos-1))
 349                                 --cpos;
 350                         else if (cpos > 0 && par_.isWordSeparator(cpos))
 351                                 --cpos;
 352                         new_word = par_.isSameSpellRange(pos, cpos) ;
 353                 }
 354                 if (!new_word)
 355                         paintMisspelledMark(orig_x, changed);
 356         }
 357 }
 358
 359
 360 void RowPainter::paintChangeBar()
 361 {
 362         pos_type const start = row_.pos();
 363         pos_type end = row_.endpos();
 364
 365         if (par_.size() == end) {
 366                 // this is the last row of the paragraph;
 367                 // thus, we must also consider the imaginary end-of-par character
 368                 end++;
 369         }
 370
 371         if (start == end || !par_.isChanged(start, end))
 372                 return;
 373
 374         int const height = text_metrics_.isLastRow(pit_, row_)
 375                 ? row_.ascent()
 376                 : row_.height();
 377
 378         pi_.pain.fillRectangle(5, yo_ - row_.ascent(), 3, height, Color_changebar);
 379 }
 380
 381
 382 void RowPainter::paintAppendix()
 383 {
 384         // only draw the appendix frame once (for the main text)
 385         if (!par_.params().appendix() || !text_.isMainText())
 386                 return;
 387
 388         int y = yo_ - row_.ascent();
 389
 390         if (par_.params().startOfAppendix())
 391                 y += 2 * defaultRowHeight();
 392
 393         pi_.pain.line(1, y, 1, yo_ + row_.height(), Color_appendix);
 394         pi_.pain.line(width_ - 2, y, width_ - 2, yo_ + row_.height(), Color_appendix);
 395 }
 396
 397
 398 void RowPainter::paintDepthBar()
 399 {
 400         depth_type const depth = par_.getDepth();
 401
 402         if (depth <= 0)
 403                 return;
 404
 405         depth_type prev_depth = 0;
 406         if (!text_metrics_.isFirstRow(pit_, row_)) {
 407                 pit_type pit2 = pit_;
 408                 if (row_.pos() == 0)
 409                         --pit2;
 410                 prev_depth = pars_[pit2].getDepth();
 411         }
 412
 413         depth_type next_depth = 0;
 414         if (!text_metrics_.isLastRow(pit_, row_)) {
 415                 pit_type pit2 = pit_;
 416                 if (row_.endpos() >= pars_[pit2].size())
 417                         ++pit2;
 418                 next_depth = pars_[pit2].getDepth();
 419         }
 420
 421         for (depth_type i = 1; i <= depth; ++i) {
 422                 int const w = nestMargin() / 5;
 423                 int x = int(xo_) + w * i;
 424                 // only consider the changebar space if we're drawing outermost text
 425                 if (text_.isMainText())
 426                         x += changebarMargin();
 427
 428                 int const starty = yo_ - row_.ascent();
 429                 int const h =  row_.height() - 1 - (i - next_depth - 1) * 3;
 430
 431                 pi_.pain.line(x, starty, x, starty + h, Color_depthbar);
 432
 433                 if (i > prev_depth)
 434                         pi_.pain.fillRectangle(x, starty, w, 2, Color_depthbar);
 435                 if (i > next_depth)
 436                         pi_.pain.fillRectangle(x, starty + h, w, 2, Color_depthbar);
 437         }
 438 }
 439
 440
 441 int RowPainter::paintAppendixStart(int y)
 442 {
 443         FontInfo pb_font = sane_font;
 444         pb_font.setColor(Color_appendix);
 445         pb_font.decSize();
 446
 447         int w = 0;
 448         int a = 0;
 449         int d = 0;
 450
 451         docstring const label = _("Appendix");
 452         theFontMetrics(pb_font).rectText(label, w, a, d);
 453
 454         int const text_start = int(xo_ + (width_ - w) / 2);
 455         int const text_end = text_start + w;
 456
 457         pi_.pain.rectText(text_start, y + d, label, pb_font, Color_none, Color_none);
 458
 459         pi_.pain.line(int(xo_ + 1), y, text_start, y, Color_appendix);
 460         pi_.pain.line(text_end, y, int(xo_ + width_ - 2), y, Color_appendix);
 461
 462         return 3 * defaultRowHeight();
 463 }
 464
 465
 466 void RowPainter::paintFirst()
 467 {
 468         BufferParams const & bparams = pi_.base.bv->buffer().params();
 469         Layout const & layout = par_.layout();
 470
 471         int y_top = 0;
 472
 473         // start of appendix?
 474         if (par_.params().startOfAppendix())
 475                 y_top += paintAppendixStart(yo_ - row_.ascent() + 2 * defaultRowHeight());
 476
 477         if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
 478                 && pit_ != 0) {
 479                 if (layout.latextype == LATEX_PARAGRAPH
 480                     && !par_.getDepth()) {
 481                         y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 482                 } else {
 483                         Layout const & playout = pars_[pit_ - 1].layout();
 484                         if (playout.latextype == LATEX_PARAGRAPH
 485                             && !pars_[pit_ - 1].getDepth()) {
 486                                 // is it right to use defskip here, too? (AS)
 487                                 y_top += bparams.getDefSkip().inPixels(*pi_.base.bv);
 488                         }
 489                 }
 490         }
 491
 492         bool const is_first =
 493                 text_.isFirstInSequence(pit_) || !layout.isParagraphGroup();
 494         //lyxerr << "paintFirst: " << par_.id() << " is_seq: " << is_seq << endl;
 495
 496         if (layout.labelIsInline()
 497                         && (layout.labeltype != LABEL_STATIC || is_first)) {
 498                 paintLabel();
 499         } else if (is_first && layout.labelIsAbove()) {
 500                 paintTopLevelLabel();
 501         }
 502 }
 503
 504
 505 void RowPainter::paintLabel()
 506 {
 507         docstring const str = par_.labelString();
 508         if (str.empty())
 509                 return;
 510
 511         bool const is_rtl = text_.isRTL(par_);
 512         Layout const & layout = par_.layout();
 513         FontInfo const font = labelFont();
 514         FontMetrics const & fm = theFontMetrics(font);
 515         double x = x_;
 516
 517         if (is_rtl) {
 518                 x = width_ - leftMargin()
 519                         + fm.width(layout.labelsep);
 520         } else {
 521                 x = x_ - fm.width(layout.labelsep)
 522                         - fm.width(str);
 523         }
 524
 525         pi_.pain.text(int(x), yo_, str, font);
 526 }
 527
 528
 529 void RowPainter::paintTopLevelLabel()
 530 {
 531         BufferParams const & bparams = pi_.base.bv->buffer().params();
 532         bool const is_rtl = text_.isRTL(par_);
 533         ParagraphParameters const & pparams = par_.params();
 534         Layout const & layout = par_.layout();
 535         FontInfo const font = labelFont();
 536         docstring const str = par_.labelString();
 537         if (str.empty())
 538                 return;
 539
 540         double spacing_val = 1.0;
 541         if (!pparams.spacing().isDefault())
 542                 spacing_val = pparams.spacing().getValue();
 543         else
 544                 spacing_val = bparams.spacing().getValue();
 545
 546         FontMetrics const & fm = theFontMetrics(font);
 547
 548         int const labeladdon = int(fm.maxHeight()
 549                 * layout.spacing.getValue() * spacing_val);
 550
 551         int maxdesc =
 552                 int(fm.maxDescent() * layout.spacing.getValue() * spacing_val
 553                 + (layout.labelbottomsep * defaultRowHeight()));
 554
 555         double x = x_;
 556         if (layout.labeltype == LABEL_CENTERED) {
 557                 if (is_rtl)
 558                         x = leftMargin();
 559                 x += (width_ - text_metrics_.rightMargin(pm_) - leftMargin()) / 2;
 560                 x -= fm.width(str) / 2;
 561         } else if (is_rtl) {
 562                 x = width_ - leftMargin() -     fm.width(str);
 563         }
 564         pi_.pain.text(int(x), yo_ - maxdesc - labeladdon, str, font);
 565 }
 566
 567
 568 /** Check if the current paragraph is the last paragraph in a
 569     proof environment */
 570 static int getEndLabel(pit_type p, Text const & text)
 571 {
 572         ParagraphList const & pars = text.paragraphs();
 573         pit_type pit = p;
 574         depth_type par_depth = pars[p].getDepth();
 575         while (pit != pit_type(pars.size())) {
 576                 Layout const & layout = pars[pit].layout();
 577                 int const endlabeltype = layout.endlabeltype;
 578
 579                 if (endlabeltype != END_LABEL_NO_LABEL) {
 580                         if (p + 1 == pit_type(pars.size()))
 581                                 return endlabeltype;
 582
 583                         depth_type const next_depth =
 584                                 pars[p + 1].getDepth();
 585                         if (par_depth > next_depth ||
 586                             (par_depth == next_depth && layout != pars[p + 1].layout()))
 587                                 return endlabeltype;
 588                         break;
 589                 }
 590                 if (par_depth == 0)
 591                         break;
 592                 pit = text.outerHook(pit);
 593                 if (pit != pit_type(pars.size()))
 594                         par_depth = pars[pit].getDepth();
 595         }
 596         return END_LABEL_NO_LABEL;
 597 }
 598
 599
 600 void RowPainter::paintLast()
 601 {
 602         bool const is_rtl = text_.isRTL(par_);
 603         int const endlabel = getEndLabel(pit_, text_);
 604
 605         // paint imaginary end-of-paragraph character
 606
 607         Change const & change = par_.lookupChange(par_.size());
 608         if (change.changed()) {
 609                 FontMetrics const & fm =
 610                         theFontMetrics(pi_.base.bv->buffer().params().getFont());
 611                 int const length = fm.maxAscent() / 2;
 612                 Color col = change.color();
 613
 614                 pi_.pain.line(int(x_) + 1, yo_ + 2, int(x_) + 1, yo_ + 2 - length, col,
 615                            Painter::line_solid, 3);
 616
 617                 if (change.deleted()) {
 618                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1 + length,
 619                                 yo_ + 2, col, Painter::line_solid, 3);
 620                 } else {
 621                         pi_.pain.line(int(x_) + 1 - length, yo_ + 2, int(x_) + 1,
 622                                 yo_ + 2, col, Painter::line_solid, 3);
 623                 }
 624         }
 625
 626         // draw an endlabel
 627
 628         switch (endlabel) {
 629         case END_LABEL_BOX:
 630         case END_LABEL_FILLED_BOX: {
 631                 FontInfo const font = labelFont();
 632                 FontMetrics const & fm = theFontMetrics(font);
 633                 int const size = int(0.75 * fm.maxAscent());
 634                 int const y = yo_ - size;
 635                 int const max_row_width = width_ - size - Inset::TEXT_TO_INSET_OFFSET;
 636                 int x = is_rtl ? nestMargin() + changebarMargin()
 637                         : max_row_width - text_metrics_.rightMargin(pm_);
 638
 639                 // If needed, move the box a bit to avoid overlapping with text.
 640                 int const rem = max_row_width - row_.width();
 641                 if (rem <= 0)
 642                         x += is_rtl ? rem : - rem;
 643
 644                 if (endlabel == END_LABEL_BOX)
 645                         pi_.pain.rectangle(x, y, size, size, Color_eolmarker);
 646                 else
 647                         pi_.pain.fillRectangle(x, y, size, size, Color_eolmarker);
 648                 break;
 649         }
 650
 651         case END_LABEL_STATIC: {
 652                 FontInfo const font = labelFont();
 653                 FontMetrics const & fm = theFontMetrics(font);
 654                 docstring const & str = par_.layout().endlabelstring();
 655                 double const x = is_rtl ? x_ - fm.width(str) : x_;
 656                 pi_.pain.text(int(x), yo_, str, font);
 657                 break;
 658         }
 659
 660         case END_LABEL_NO_LABEL:
 661                 if (lyxrc.paragraph_markers && size_type(pit_ + 1) < pars_.size()) {
 662                         docstring const s = docstring(1, char_type(0x00B6));
 663                         FontInfo f = FontInfo(text_.layoutFont(pit_));
 664                         f.setColor(Color_paragraphmarker);
 665                         pi_.pain.text(int(x_), yo_, s, f);
 666                         x_ += theFontMetrics(f).width(s);
 667                 }
 668                 break;
 669         }
 670 }
 671
 672
 673 void RowPainter::paintOnlyInsets()
 674 {
 675         CoordCache const & cache = pi_.base.bv->coordCache();
 676         pos_type const end = row_.endpos();
 677         for (pos_type pos = row_.pos(); pos != end; ++pos) {
 678                 // If outer row has changed, nested insets are repaint completely.
 679                 Inset const * inset = par_.getInset(pos);
 680                 bool const nested_inset = inset &&
 681                                 ((inset->asInsetMath() &&
 682                                   !inset->asInsetMath()->asMacroTemplate())
 683                                  || inset->asInsetText()
 684                                  || inset->asInsetTabular());
 685                 if (!nested_inset)
 686                         continue;
 687                 if (x_ > pi_.base.bv->workWidth()
 688                     || !cache.getInsets().has(inset))
 689                         continue;
 690                 x_ = cache.getInsets().x(inset);
 691
 692                 bool const pi_selected = pi_.selected;
 693                 Cursor const & cur = pi_.base.bv->cursor();
 694                 if (cur.selection() && cur.text() == &text_
 695                           && cur.normalAnchor().text() == &text_)
 696                         pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 697                 paintInset(inset, pos);
 698                 pi_.selected = pi_selected;
 699         }
 700 }
 701
 702
 703 void RowPainter::paintText()
 704 {
 705         //LYXERR0("-------------------------------------------------------");
 706         pos_type const end = row_.endpos();
 707         // Spaces at logical line breaks in bidi text must be skipped during
 708         // painting. However, they may appear visually in the middle
 709         // of a row; they must be skipped, wherever they are...
 710         // * logically "abc_[HEBREW_\nHEBREW]"
 711         // * visually "abc_[_WERBEH\nWERBEH]"
 712         pos_type skipped_sep_vpos = -1;
 713         pos_type body_pos = par_.beginOfBody();
 714         if (body_pos > 0 &&
 715                 (body_pos > end || !par_.isLineSeparator(body_pos - 1))) {
 716                 body_pos = 0;
 717         }
 718
 719         Layout const & layout = par_.layout();
 720
 721         Change change_running;
 722         int change_last_x = 0;
 723
 724         // check for possible inline completion
 725         DocIterator const & inlineCompletionPos = pi_.base.bv->inlineCompletionPos();
 726         pos_type inlineCompletionVPos = -1;
 727         if (inlineCompletionPos.inTexted()
 728             && inlineCompletionPos.text() == &text_
 729             && inlineCompletionPos.pit() == pit_
 730             && inlineCompletionPos.pos() - 1 >= row_.pos()
 731             && inlineCompletionPos.pos() - 1 < row_.endpos()) {
 732                 // draw logically behind the previous character
 733                 inlineCompletionVPos = bidi_.log2vis(inlineCompletionPos.pos() - 1);
 734         }
 735
 736         // Use font span to speed things up, see below
 737         FontSpan font_span;
 738         Font font;
 739
 740         // If the last logical character is a separator, don't paint it, unless
 741         // it's in the last row of a paragraph; see skipped_sep_vpos declaration
 742         if (end > 0 && end < par_.size() && par_.isSeparator(end - 1))
 743                 skipped_sep_vpos = bidi_.log2vis(end - 1);
 744
 745         for (pos_type vpos = row_.pos(); vpos < end; ) {
 746                 if (x_ > pi_.base.bv->workWidth())
 747                         break;
 748
 749                 // Skip the separator at the logical end of the row
 750                 if (vpos == skipped_sep_vpos) {
 751                         ++vpos;
 752                         continue;
 753                 }
 754
 755                 pos_type const pos = bidi_.vis2log(vpos);
 756
 757                 if (pos >= par_.size()) {
 758                         ++vpos;
 759                         continue;
 760                 }
 761
 762                 // Use font span to speed things up, see above
 763                 if (vpos < font_span.first || vpos > font_span.last) {
 764                         font_span = par_.fontSpan(vpos);
 765                         font = text_metrics_.displayFont(pit_, vpos);
 766
 767                         // split font span if inline completion is inside
 768                         if (font_span.first <= inlineCompletionVPos
 769                             && font_span.last > inlineCompletionVPos)
 770                                 font_span.last = inlineCompletionVPos;
 771                 }
 772
 773                 // Note that this value will only be used in
 774                 // situations where no ligature of composition of
 775                 // characters is needed. (see comments alginuses of width_pos).
 776                 const int width_pos = pm_.singleWidth(pos, font);
 777
 778                 Change const & change = par_.lookupChange(pos);
 779                 if (change.changed() && !change_running.changed()) {
 780                         change_running = change;
 781                         change_last_x = int(x_);
 782                 }
 783
 784                 Inset const * inset = par_.getInset(pos);
 785                 bool const highly_editable_inset = inset
 786                         && inset->editable();
 787
 788                 // If we reach the end of a change or if the author changes, paint it.
 789                 // We also don't paint across things like tables
 790                 if (change_running.changed() && (highly_editable_inset
 791                         || !change.changed() || !change_running.isSimilarTo(change))) {
 792                         // Calculate 1/3 height of the buffer's default font
 793                         FontMetrics const & fm
 794                                 = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 795                         float const y_bar = change_running.deleted() ?
 796                                 yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 797                         pi_.pain.line(change_last_x, int(y_bar), int(x_), int(y_bar),
 798                                 change_running.color(), Painter::line_solid, solid_line_thickness_);
 799
 800                         // Change might continue with a different author or type
 801                         if (change.changed() && !highly_editable_inset) {
 802                                 change_running = change;
 803                                 change_last_x = int(x_);
 804                         } else
 805                                 change_running.setUnchanged();
 806                 }
 807
 808                 if (body_pos > 0 && pos == body_pos - 1) {
 809                         int const lwidth = theFontMetrics(labelFont())
 810                                 .width(layout.labelsep);
 811
 812                         // width_pos is either the width of a space or an inset
 813                         x_ += row_.label_hfill + lwidth - width_pos;
 814                 }
 815
 816                 // Is the inline completion in front of character?
 817                 if (font.isRightToLeft() && vpos == inlineCompletionVPos)
 818                         paintInlineCompletion(font);
 819
 820                 if (par_.isSeparator(pos)) {
 821                         Font const orig_font = text_metrics_.displayFont(pit_, pos);
 822                         double const orig_x = x_;
 823                         // width_pos is the width of a space
 824                         double separator_width = width_pos;
 825                         if (pos >= body_pos)
 826                                 separator_width += row_.separator;
 827                         paintSeparator(orig_x, separator_width, orig_font.fontInfo());
 828                         paintForeignMark(orig_x, orig_font.language());
 829                         ++vpos;
 830
 831                 } else if (inset) {
 832                         // If outer row has changed, nested insets are repaint completely.
 833                         pi_.base.bv->coordCache().insets().add(inset, int(x_), yo_);
 834
 835                         bool const pi_selected = pi_.selected;
 836                         Cursor const & cur = pi_.base.bv->cursor();
 837                         if (cur.selection() && cur.text() == &text_
 838                                   && cur.normalAnchor().text() == &text_)
 839                                 pi_.selected = row_.sel_beg <= pos && row_.sel_end > pos;
 840                         paintInset(inset, pos);
 841                         pi_.selected = pi_selected;
 842                         ++vpos;
 843
 844                 } else {
 845                         // paint as many characters as possible.
 846                         paintFromPos(vpos, change_running.changed());
 847                 }
 848
 849                 // Is the inline completion after character?
 850                 if (!font.isRightToLeft() && vpos - 1 == inlineCompletionVPos)
 851                         paintInlineCompletion(font);
 852         }
 853
 854         // if we reach the end of a struck out range, paint it
 855         if (change_running.changed()) {
 856                 FontMetrics const & fm
 857                         = theFontMetrics(pi_.base.bv->buffer().params().getFont());
 858                 float const y_bar = change_running.deleted() ?
 859                                 yo_ - fm.maxAscent() / 3 : yo_ + 2 * solid_line_offset_ + solid_line_thickness_;
 860                 pi_.pain.line(change_last_x, int(y_bar), int(x_), int(y_bar),
 861                         change_running.color(), Painter::line_solid, solid_line_thickness_);
 862                 change_running.setUnchanged();
 863         }
 864 }
 865
 866
 867 void RowPainter::paintSelection()
 868 {
 869         if (!row_.selection())
 870                 return;
 871         Cursor const & curs = pi_.base.bv->cursor();
 872         DocIterator beg = curs.selectionBegin();
 873         beg.pit() = pit_;
 874         beg.pos() = row_.sel_beg;
 875
 876         DocIterator end = curs.selectionEnd();
 877         end.pit() = pit_;
 878         end.pos() = row_.sel_end;
 879
 880         bool const begin_boundary = beg.pos() >= row_.endpos();
 881         bool const end_boundary = row_.sel_end == row_.endpos();
 882
 883         DocIterator cur = beg;
 884         cur.boundary(begin_boundary);
 885         int x1 = text_metrics_.cursorX(beg.top(), begin_boundary);
 886         int x2 = text_metrics_.cursorX(end.top(), end_boundary);
 887         int const y1 = yo_ - row_.ascent();
 888         int const y2 = y1 + row_.height();
 889
 890         int const rm = text_.isMainText() ? pi_.base.bv->rightMargin() : 0;
 891         int const lm = text_.isMainText() ? pi_.base.bv->leftMargin() : 0;
 892
 893         // draw the margins
 894         if (row_.begin_margin_sel) {
 895                 if (text_.isRTL(beg.paragraph())) {
 896                         pi_.pain.fillRectangle(int(xo_ + x1), y1,
 897                                 text_metrics_.width() - rm - x1, y2 - y1, Color_selection);
 898                 } else {
 899                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x1 - lm, y2 - y1,
 900                                 Color_selection);
 901                 }
 902         }
 903
 904         if (row_.end_margin_sel) {
 905                 if (text_.isRTL(beg.paragraph())) {
 906                         pi_.pain.fillRectangle(int(xo_ + lm), y1, x2 - lm, y2 - y1,
 907                                 Color_selection);
 908                 } else {
 909                         pi_.pain.fillRectangle(int(xo_ + x2), y1, text_metrics_.width() - rm - x2,
 910                                 y2 - y1, Color_selection);
 911                 }
 912         }
 913
 914         // if we are on a boundary from the beginning, it's probably
 915         // a RTL boundary and we jump to the other side directly as this
 916         // segement is 0-size and confuses the logic below
 917         if (cur.boundary())
 918                 cur.boundary(false);
 919
 920         // go through row and draw from RTL boundary to RTL boundary
 921         while (cur < end) {
 922                 bool draw_now = false;
 923
 924                 // simplified cursorForward code below which does not
 925                 // descend into insets and which does not go into the
 926                 // next line. Compare the logic with the original cursorForward
 927
 928                 // if left of boundary -> just jump to right side, but
 929                 // for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
 930                 if (cur.boundary()) {
 931                         cur.boundary(false);
 932                 }       else if (text_metrics_.isRTLBoundary(cur.pit(), cur.pos() + 1)) {
 933                         // in front of RTL boundary -> Stay on this side of the boundary
 934                         // because:  ab|cDDEEFFghi -> abc|DDEEFFghi
 935                         ++cur.pos();
 936                         cur.boundary(true);
 937                         draw_now = true;
 938                 } else {
 939                         // move right
 940                         ++cur.pos();
 941
 942                         // line end?
 943                         if (cur.pos() == row_.endpos())
 944                                 cur.boundary(true);
 945                 }
 946
 947                 if (x1 == -1) {
 948                         // the previous segment was just drawn, now the next starts
 949                         x1 = text_metrics_.cursorX(cur.top(), cur.boundary());
 950                 }
 951
 952                 if (!(cur < end) || draw_now) {
 953                         x2 = text_metrics_.cursorX(cur.top(), cur.boundary());
 954                         pi_.pain.fillRectangle(int(xo_ + min(x1, x2)), y1, abs(x2 - x1),
 955                                 y2 - y1, Color_selection);
 956
 957                         // reset x1, so it is set again next round (which will be on the
 958                         // right side of a boundary or at the selection end)
 959                         x1 = -1;
 960                 }
 961         }
 962 }
 963
 964
 965 void RowPainter::paintInlineCompletion(Font const & font)
 966 {
 967         docstring completion = pi_.base.bv->inlineCompletion();
 968         FontInfo f = font.fontInfo();
 969         bool rtl = font.isRightToLeft();
 970
 971         // draw the unique and the non-unique completion part
 972         // Note: this is not time-critical as it is
 973         // only done once per screen.
 974         size_t uniqueTo = pi_.base.bv->inlineCompletionUniqueChars();
 975         docstring s1 = completion.substr(0, uniqueTo);
 976         docstring s2 = completion.substr(uniqueTo);
 977         ColorCode c1 = Color_inlinecompletion;
 978         ColorCode c2 = Color_nonunique_inlinecompletion;
 979
 980         // right to left?
 981         if (rtl) {
 982                 swap(s1, s2);
 983                 swap(c1, c2);
 984         }
 985
 986         if (!s1.empty()) {
 987                 f.setColor(c1);
 988                 pi_.pain.text(int(x_), yo_, s1, f);
 989                 x_ += theFontMetrics(font).width(s1);
 990         }
 991
 992         if (!s2.empty()) {
 993                 f.setColor(c2);
 994                 pi_.pain.text(int(x_), yo_, s2, f);
 995                 x_ += theFontMetrics(font).width(s2);
 996         }
 997 }
 998
 999 } // namespace lyx