2 * \file src/TextMetrics.cpp
3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
6 * \author Asger Alstrup
7 * \author Lars Gullik Bjønnes
8 * \author Jean-Marc Lasgouttes
10 * \author André Pönitz
12 * \author Jürgen Vigna
13 * \author Abdelrazak Younes
15 * Full author contact details are available in file CREDITS.
20 #include "TextMetrics.h"
23 #include "buffer_funcs.h"
24 #include "BufferParams.h"
25 #include "BufferView.h"
26 #include "CoordCache.h"
28 #include "CutAndPaste.h"
29 #include "InsetList.h"
33 #include "MetricsInfo.h"
34 #include "ParagraphParameters.h"
35 #include "RowPainter.h"
37 #include "TextClass.h"
40 #include "insets/InsetText.h"
42 #include "mathed/InsetMathMacroTemplate.h"
44 #include "frontends/FontMetrics.h"
45 #include "frontends/Painter.h"
46 #include "frontends/NullPainter.h"
48 #include "support/convert.h"
49 #include "support/debug.h"
50 #include "support/lassert.h"
60 using frontend::FontMetrics;
65 int numberOfLabelHfills(Paragraph const & par, Row const & row)
67 pos_type last = row.endpos() - 1;
68 pos_type first = row.pos();
70 // hfill *DO* count at the beginning of paragraphs!
72 while (first < last && par.isHfill(first))
76 last = min(last, par.beginOfBody());
78 for (pos_type p = first; p < last; ++p) {
85 // FIXME: this needs to be rewritten, probably by merging it into some
86 // code that, besides counting, sets the active status of the space
87 // inset in the row element.
88 int numberOfHfills(Row const & row, ParagraphMetrics const & pm,
89 pos_type const body_pos)
92 Row::const_iterator cit = row.begin();
93 Row::const_iterator const end = row.end();
94 for ( ; cit != end ; ++cit)
95 if (cit->pos >= body_pos
96 && cit->inset && pm.hfillExpansion(row, cit->pos))
104 /////////////////////////////////////////////////////////////////////
108 /////////////////////////////////////////////////////////////////////
111 TextMetrics::TextMetrics(BufferView * bv, Text * text)
112 : bv_(bv), text_(text)
115 max_width_ = bv_->workWidth();
116 dim_.wid = max_width_;
122 bool TextMetrics::contains(pit_type pit) const
124 return par_metrics_.find(pit) != par_metrics_.end();
128 ParagraphMetrics const & TextMetrics::parMetrics(pit_type pit) const
130 return const_cast<TextMetrics *>(this)->parMetrics(pit, true);
135 pair<pit_type, ParagraphMetrics const *> TextMetrics::first() const
137 ParMetricsCache::const_iterator it = par_metrics_.begin();
138 return make_pair(it->first, &it->second);
142 pair<pit_type, ParagraphMetrics const *> TextMetrics::last() const
144 LBUFERR(!par_metrics_.empty());
145 ParMetricsCache::const_reverse_iterator it = par_metrics_.rbegin();
146 return make_pair(it->first, &it->second);
150 ParagraphMetrics & TextMetrics::parMetrics(pit_type pit, bool redo)
152 ParMetricsCache::iterator pmc_it = par_metrics_.find(pit);
153 if (pmc_it == par_metrics_.end()) {
154 pmc_it = par_metrics_.insert(
155 make_pair(pit, ParagraphMetrics(text_->getPar(pit)))).first;
157 if (pmc_it->second.rows().empty() && redo)
159 return pmc_it->second;
163 bool TextMetrics::metrics(MetricsInfo & mi, Dimension & dim, int min_width,
164 bool const expand_on_multipars)
166 LBUFERR(mi.base.textwidth > 0);
167 max_width_ = mi.base.textwidth;
168 // backup old dimension.
169 Dimension const old_dim = dim_;
172 dim_.wid = min_width;
173 pit_type const npar = text_->paragraphs().size();
174 if (npar > 1 && expand_on_multipars)
175 // If there is more than one row, expand the text to
176 // the full allowable width.
177 dim_.wid = max_width_;
179 //lyxerr << "TextMetrics::metrics: width: " << mi.base.textwidth
180 // << " maxWidth: " << max_width_ << "\nfont: " << mi.base.font << endl;
182 bool changed = false;
184 for (pit_type pit = 0; pit != npar; ++pit) {
185 changed |= redoParagraph(pit);
186 ParagraphMetrics const & pm = par_metrics_[pit];
188 if (dim_.wid < pm.width())
189 dim_.wid = pm.width();
192 dim_.asc = par_metrics_[0].ascent();
193 dim_.des = h - dim_.asc;
194 //lyxerr << "dim_.wid " << dim_.wid << endl;
195 //lyxerr << "dim_.asc " << dim_.asc << endl;
196 //lyxerr << "dim_.des " << dim_.des << endl;
198 changed |= dim_ != old_dim;
204 void TextMetrics::updatePosCache(pit_type pit) const
206 frontend::NullPainter np;
207 PainterInfo pi(bv_, np);
208 drawParagraph(pi, pit, origin_.x_, par_metrics_[pit].position());
212 int TextMetrics::rightMargin(ParagraphMetrics const & pm) const
214 return text_->isMainText() ? pm.rightMargin(*bv_) : 0;
218 int TextMetrics::rightMargin(pit_type const pit) const
220 return text_->isMainText() ? par_metrics_[pit].rightMargin(*bv_) : 0;
224 void TextMetrics::applyOuterFont(Font & font) const
226 FontInfo lf(font_.fontInfo());
227 lf.reduce(bv_->buffer().params().getFont().fontInfo());
228 font.fontInfo().realize(lf);
232 Font TextMetrics::displayFont(pit_type pit, pos_type pos) const
234 LASSERT(pos >= 0, { static Font f; return f; });
236 ParagraphList const & pars = text_->paragraphs();
237 Paragraph const & par = pars[pit];
238 Layout const & layout = par.layout();
239 Buffer const & buffer = bv_->buffer();
241 BufferParams const & params = buffer.params();
242 pos_type const body_pos = par.beginOfBody();
244 // We specialize the 95% common case:
245 if (!par.getDepth()) {
246 Font f = par.getFontSettings(params, pos);
247 if (!text_->isMainText())
249 bool lab = layout.labeltype == LABEL_MANUAL && pos < body_pos;
251 FontInfo const & lf = lab ? layout.labelfont : layout.font;
252 FontInfo rlf = lab ? layout.reslabelfont : layout.resfont;
254 // In case the default family has been customized
255 if (lf.family() == INHERIT_FAMILY)
256 rlf.setFamily(params.getFont().fontInfo().family());
257 f.fontInfo().realize(rlf);
261 // The uncommon case need not be optimized as much
262 FontInfo const & layoutfont = pos < body_pos ?
263 layout.labelfont : layout.font;
265 Font font = par.getFontSettings(params, pos);
266 font.fontInfo().realize(layoutfont);
268 if (!text_->isMainText())
269 applyOuterFont(font);
271 // Realize against environment font information
272 // NOTE: the cast to pit_type should be removed when pit_type
273 // changes to a unsigned integer.
274 if (pit < pit_type(pars.size()))
275 font.fontInfo().realize(text_->outerFont(pit).fontInfo());
277 // Realize with the fonts of lesser depth.
278 font.fontInfo().realize(params.getFont().fontInfo());
284 bool TextMetrics::isRTL(CursorSlice const & sl, bool boundary) const
290 if (boundary && sl.pos() > 0)
293 return displayFont(sl.pit(), sl.pos() + correction).isVisibleRightToLeft();
297 bool TextMetrics::isRTLBoundary(pit_type pit, pos_type pos) const
299 // no RTL boundary at paragraph start
303 Font const & left_font = displayFont(pit, pos - 1);
305 return isRTLBoundary(pit, pos, left_font);
309 // isRTLBoundary returns false on a real end-of-line boundary,
310 // because otherwise the two boundary types get mixed up.
311 // This is the whole purpose of this being in TextMetrics.
312 bool TextMetrics::isRTLBoundary(pit_type pit, pos_type pos,
313 Font const & font) const
315 if (// no RTL boundary at paragraph start
317 // if the metrics have not been calculated, then we are not
318 // on screen and can safely ignore issues about boundaries.
322 ParagraphMetrics & pm = par_metrics_[pit];
323 // no RTL boundary in empty paragraph
324 if (pm.rows().empty())
327 pos_type endpos = pm.getRow(pos - 1, false).endpos();
328 pos_type startpos = pm.getRow(pos, false).pos();
329 // no RTL boundary at line start:
330 // abc\n -> toggle to RTL -> abc\n (and not: abc\n|
332 if (pos == startpos && pos == endpos) // start of cur row, end of prev row
335 Paragraph const & par = text_->getPar(pit);
336 // no RTL boundary at line break:
337 // abc|\n -> move right -> abc\n (and not: abc\n|
339 if (startpos == pos && endpos == pos && endpos != par.size()
340 && (par.isNewline(pos - 1)
341 || par.isEnvSeparator(pos - 1)
342 || par.isLineSeparator(pos - 1)
343 || par.isSeparator(pos - 1)))
346 bool left = font.isVisibleRightToLeft();
348 if (pos == par.size())
349 right = par.isRTL(bv_->buffer().params());
351 right = displayFont(pit, pos).isVisibleRightToLeft();
353 return left != right;
357 bool TextMetrics::redoParagraph(pit_type const pit)
359 Paragraph & par = text_->getPar(pit);
360 // IMPORTANT NOTE: We pass 'false' explicitly in order to not call
361 // redoParagraph() recursively inside parMetrics.
362 Dimension old_dim = parMetrics(pit, false).dim();
363 ParagraphMetrics & pm = par_metrics_[pit];
366 Buffer & buffer = bv_->buffer();
367 bool changed = false;
369 // Check whether there are InsetBibItems that need fixing
370 // FIXME: This check ought to be done somewhere else. It is the reason
371 // why text_ is not const. But then, where else to do it?
372 // Well, how can you end up with either (a) a biblio environment that
373 // has no InsetBibitem or (b) a biblio environment with more than one
374 // InsetBibitem? I think the answer is: when paragraphs are merged;
375 // when layout is set; when material is pasted.
376 if (par.brokenBiblio()) {
377 Cursor & cur = const_cast<Cursor &>(bv_->cursor());
378 // In some cases, we do not know how to record undo
379 if (&cur.inset() == &text_->inset())
380 cur.recordUndo(pit, pit);
382 int const moveCursor = par.fixBiblio(buffer);
384 // Is it necessary to update the cursor?
385 if (&cur.inset() == &text_->inset() && cur.pit() == pit) {
388 else if (moveCursor < 0 && cur.pos() >= -moveCursor)
393 // Optimisation: this is used in the next two loops
394 // so better to calculate that once here.
395 int const right_margin = rightMargin(pm);
397 // iterator pointing to paragraph to resolve macros
398 DocIterator parPos = text_->macrocontextPosition();
402 LYXERR(Debug::INFO, "MacroContext not initialised!"
403 << " Going through the buffer again and hope"
404 << " the context is better then.");
405 // FIXME audit updateBuffer calls
406 // This should not be here, but it is not clear yet where else it
408 bv_->buffer().updateBuffer();
409 parPos = text_->macrocontextPosition();
410 LBUFERR(!parPos.empty());
415 par.setBeginOfBody();
416 Font const bufferfont = buffer.params().getFont();
417 CoordCache::Insets & insetCache = bv_->coordCache().insets();
418 for (auto const & e : par.insetList()) {
419 // FIXME Doesn't this HAVE to be non-empty?
420 // position already initialized?
421 if (!parPos.empty()) {
422 parPos.pos() = e.pos;
424 // A macro template would normally not be visible
425 // by itself. But the tex macro semantics allow
426 // recursion, so we artifically take the context
427 // after the macro template to simulate this.
428 if (e.inset->lyxCode() == MATHMACRO_CODE)
432 // If there is an end of paragraph marker, its size should be
433 // substracted to the available width. The logic here is
434 // almost the same as in breakRow, remember keep them in sync.
436 if (lyxrc.paragraph_markers && e.pos + 1 == par.size()
437 && size_type(pit + 1) < text_->paragraphs().size()) {
438 Font f(text_->layoutFont(pit));
439 // ¶ U+00B6 PILCROW SIGN
440 eop = theFontMetrics(f).width(char_type(0x00B6));
443 // do the metric calculation
445 int const w = max_width_ - leftMargin(pit, e.pos)
446 - right_margin - eop;
447 Font const & font = e.inset->inheritFont() ?
448 displayFont(pit, e.pos) : bufferfont;
449 MacroContext mc(&buffer, parPos);
450 MetricsInfo mi(bv_, font.fontInfo(), w, mc);
451 e.inset->metrics(mi, dim);
452 if (!insetCache.has(e.inset) || insetCache.dim(e.inset) != dim) {
453 insetCache.add(e.inset, dim);
459 size_t row_index = 0;
460 bool need_new_row = false;
461 // maximum pixel width of a row
463 if (row_index == pm.rows().size())
464 pm.rows().push_back(Row());
465 Row & row = pm.rows()[row_index];
469 need_new_row = breakRow(row, right_margin);
472 if (row_index || row.endpos() < par.size()
473 || (row.right_boundary() && par.inInset().lyxCode() != CELL_CODE)) {
474 /* If there is more than one row or the row has been
475 * broken by a display inset or a newline, expand the text
476 * to the full allowable width. This setting here is
477 * needed for the computeRowMetrics() below. In the case
478 * of a display inset, we do nothing when inside a table
479 * cell, because the tabular code is not prepared for
480 * that, and it triggers when using a caption in a
481 * longtable (see bugs #9945 and #9757).
483 if (dim_.wid < max_width_)
484 dim_.wid = max_width_;
486 int const max_row_width = max(dim_.wid, row.width());
487 computeRowMetrics(row, max_row_width);
488 first = row.endpos();
491 pm.dim().wid = max(pm.dim().wid, row.width());
492 pm.dim().des += row.height();
493 } while (first < par.size() || need_new_row);
495 if (row_index < pm.rows().size())
496 pm.rows().resize(row_index);
498 // FIXME: It might be better to move this in another method
499 // specially tailored for the main text.
500 // Top and bottom margin of the document (only at top-level)
501 if (text_->isMainText()) {
502 // original value was 20px, which is 0.2in at 100dpi
503 int const margin = bv_->zoomedPixels(20);
505 pm.rows().front().dimension().asc += margin;
506 /* coverity thinks that we should update pm.dim().asc
507 * below, but all the rows heights are actually counted as
508 * part of the paragraph metric descent see loop above).
510 // coverity[copy_paste_error]
511 pm.dim().des += margin;
513 ParagraphList const & pars = text_->paragraphs();
514 if (pit + 1 == pit_type(pars.size())) {
515 pm.rows().back().dimension().des += margin;
516 pm.dim().des += margin;
520 // The space above and below the paragraph.
521 int const top = parTopSpacing(pit);
522 pm.rows().front().dimension().asc += top;
523 int const bottom = parBottomSpacing(pit);
524 pm.rows().back().dimension().des += bottom;
525 pm.dim().des += top + bottom;
527 pm.dim().asc += pm.rows()[0].ascent();
528 pm.dim().des -= pm.rows()[0].ascent();
530 changed |= old_dim.height() != pm.dim().height();
536 LyXAlignment TextMetrics::getAlign(Paragraph const & par, Row const & row) const
538 LyXAlignment align = par.getAlign();
540 // handle alignment inside tabular cells
541 Inset const & owner = text_->inset();
542 bool forced_block = false;
543 switch (owner.contentAlignment()) {
544 case LYX_ALIGN_BLOCK:
545 // In general block align is the default state, but here it is
546 // an explicit choice. Therefore it should not be overridden
550 case LYX_ALIGN_CENTER:
552 case LYX_ALIGN_RIGHT:
553 if (align == LYX_ALIGN_NONE || align == LYX_ALIGN_BLOCK)
554 align = owner.contentAlignment();
557 // unchanged (use align)
561 // Display-style insets should always be on a centered row
562 if (Inset const * inset = par.getInset(row.pos())) {
563 switch (inset->display()) {
564 case Inset::AlignLeft:
565 align = LYX_ALIGN_BLOCK;
567 case Inset::AlignCenter:
568 align = LYX_ALIGN_CENTER;
571 // unchanged (use align)
573 case Inset::AlignRight:
574 align = LYX_ALIGN_RIGHT;
579 if (align == LYX_ALIGN_BLOCK) {
580 // If this row has been broken abruptly by a display inset, or
581 // it is the end of the paragraph, or the user requested we
582 // not justify stuff, then don't stretch.
583 // A forced block alignment can only be overridden the 'no
584 // justification on screen' setting.
585 if ((row.flushed() && !forced_block)
586 || !bv_->buffer().params().justification)
587 align = row.isRTL() ? LYX_ALIGN_RIGHT : LYX_ALIGN_LEFT;
594 void TextMetrics::computeRowMetrics(Row & row, int width) const
599 Paragraph const & par = text_->getPar(row.pit());
601 int const w = width - row.right_margin - row.width();
602 // FIXME: put back this assertion when the crash on new doc is solved.
603 //LASSERT(w >= 0, /**/);
605 // is there a manual margin with a manual label
606 Layout const & layout = par.layout();
609 if (layout.margintype == MARGIN_MANUAL
610 && layout.labeltype == LABEL_MANUAL) {
611 /// We might have real hfills in the label part
612 nlh = numberOfLabelHfills(par, row);
614 // A manual label par (e.g. List) has an auto-hfill
615 // between the label text and the body of the
617 // But we don't want to do this auto hfill if the par
622 if (nlh && !par.getLabelWidthString().empty())
623 row.label_hfill = labelFill(row) / double(nlh);
626 // are there any hfills in the row?
627 ParagraphMetrics & pm = par_metrics_[row.pit()];
628 int nh = numberOfHfills(row, pm, par.beginOfBody());
632 // We don't have to look at the alignment if the row is already
633 // larger then the permitted width as then we force the
634 // LEFT_ALIGN'edness!
635 if (int(row.width()) >= max_width_)
639 // Common case : there is no hfill, and the alignment will be
641 switch (getAlign(par, row)) {
642 case LYX_ALIGN_BLOCK:
643 // Expand expanding characters by a total of w
644 if (!row.setExtraWidth(w) && row.isRTL()) {
645 // Justification failed and the text is RTL: align to the right
646 row.left_margin += w;
647 row.dimension().wid += w;
651 // a displayed inset that is flushed
652 if (Inset const * inset = par.getInset(row.pos())) {
653 row.left_margin += inset->indent(*bv_);
654 row.dimension().wid += inset->indent(*bv_);
657 case LYX_ALIGN_RIGHT:
658 if (Inset const * inset = par.getInset(row.pos())) {
659 int const new_w = max(w - inset->indent(*bv_), 0);
660 row.left_margin += new_w;
661 row.dimension().wid += new_w;
663 row.left_margin += w;
664 row.dimension().wid += w;
667 case LYX_ALIGN_CENTER:
668 row.dimension().wid += w / 2;
669 row.left_margin += w / 2;
672 case LYX_ALIGN_LAYOUT:
673 case LYX_ALIGN_SPECIAL:
674 case LYX_ALIGN_DECIMAL:
680 // Case nh > 0. There are hfill separators.
683 row.dimension().wid += w;
684 // Set size of hfill insets
685 pos_type const endpos = row.endpos();
686 pos_type body_pos = par.beginOfBody();
688 && (body_pos > endpos || !par.isLineSeparator(body_pos - 1)))
691 CoordCache::Insets & insetCache = bv_->coordCache().insets();
692 for (Row::Element & e : row) {
693 if (row.label_hfill && e.endpos == body_pos
694 && e.type == Row::SPACE)
695 e.dim.wid -= int(row.label_hfill * (nlh - 1));
696 if (e.inset && pm.hfillExpansion(row, e.pos)) {
697 if (e.pos >= body_pos) {
701 e.dim.wid += hfill_rem;
703 e.dim.wid += int(row.label_hfill);
704 // Cache the inset dimension.
705 insetCache.add(e.inset, e.dim);
711 int TextMetrics::labelFill(Row const & row) const
713 Paragraph const & par = text_->getPar(row.pit());
714 LBUFERR(par.beginOfBody() > 0 || par.isEnvSeparator(0));
717 // iterate over elements before main body (except the last one,
718 // which is extra space).
719 for (Row::Element const & e : row) {
720 if (e.endpos >= par.beginOfBody())
725 docstring const & label = par.params().labelWidthString();
729 FontMetrics const & fm
730 = theFontMetrics(text_->labelFont(par));
732 return max(0, fm.width(label) - w);
737 // Not used, see TextMetrics::breakRow
738 // this needs special handling - only newlines count as a break point
739 static pos_type addressBreakPoint(pos_type i, Paragraph const & par)
741 pos_type const end = par.size();
744 if (par.isNewline(i))
752 int TextMetrics::labelEnd(pit_type const pit) const
754 // labelEnd is only needed if the layout fills a flushleft label.
755 if (text_->getPar(pit).layout().margintype != MARGIN_MANUAL)
757 // return the beginning of the body
758 return leftMargin(pit);
764 * Calling Text::getFont is slow. While rebreaking we scan a
765 * paragraph from left to right calling getFont for every char. This
766 * simple class address this problem by hidding an optimization trick
767 * (not mine btw -AB): the font is reused in the whole font span. The
768 * class handles transparently the "hidden" (not part of the fontlist)
769 * label font (as getFont does).
775 FontIterator(TextMetrics const & tm,
776 Paragraph const & par, pit_type pit, pos_type pos)
777 : tm_(tm), par_(par), pit_(pit), pos_(pos),
778 font_(tm.displayFont(pit, pos)),
779 endspan_(par.fontSpan(pos).last),
780 bodypos_(par.beginOfBody())
784 Font const & operator*() const { return font_; }
787 FontIterator & operator++()
790 if (pos_ < par_.size() && (pos_ > endspan_ || pos_ == bodypos_)) {
791 font_ = tm_.displayFont(pit_, pos_);
792 endspan_ = par_.fontSpan(pos_).last;
798 Font * operator->() { return &font_; }
802 TextMetrics const & tm_;
804 Paragraph const & par_;
819 /** This is the function where the hard work is done. The code here is
820 * very sensitive to small changes :) Note that part of the
821 * intelligence is also in Row::shortenIfNeeded.
823 bool TextMetrics::breakRow(Row & row, int const right_margin) const
825 Paragraph const & par = text_->getPar(row.pit());
826 pos_type const end = par.size();
827 pos_type const pos = row.pos();
828 pos_type const body_pos = par.beginOfBody();
829 bool const is_rtl = text_->isRTL(par);
830 bool need_new_row = false;
833 row.left_margin = leftMargin(row.pit(), pos);
834 row.right_margin = right_margin;
836 swap(row.left_margin, row.right_margin);
837 // Remember that the row width takes into account the left_margin
838 // but not the right_margin.
839 row.dimension().wid = row.left_margin;
840 // the width available for the row.
841 int const width = max_width_ - row.right_margin;
844 //FIXME: As long as leftMargin() is not correctly implemented for
845 // MARGIN_RIGHT_ADDRESS_BOX, we should also not do this here.
846 // Otherwise, long rows will be painted off the screen.
847 if (par.layout().margintype == MARGIN_RIGHT_ADDRESS_BOX)
848 return addressBreakPoint(pos, par);
851 // check for possible inline completion
852 DocIterator const & ic_it = bv_->inlineCompletionPos();
853 pos_type ic_pos = -1;
854 if (ic_it.inTexted() && ic_it.text() == text_ && ic_it.pit() == row.pit())
855 ic_pos = ic_it.pos();
857 // Now we iterate through until we reach the right margin
858 // or the end of the par, then build a representation of the row.
860 FontIterator fi = FontIterator(*this, par, row.pit(), pos);
861 while (i < end && (i == pos || row.width() <= width)) {
862 char_type c = par.getChar(i);
863 // The most special cases are handled first.
864 if (par.isInset(i)) {
865 Inset const * ins = par.getInset(i);
866 Dimension dim = bv_->coordCache().insets().dim(ins);
867 row.add(i, ins, dim, *fi, par.lookupChange(i));
868 } else if (c == ' ' && i + 1 == body_pos) {
869 // There is a space at i, but it should not be
870 // added as a separator, because it is just
871 // before body_pos. Instead, insert some spacing to
873 FontMetrics const & fm = theFontMetrics(text_->labelFont(par));
874 // this is needed to make sure that the row width is correct
876 int const add = max(fm.width(par.layout().labelsep),
877 labelEnd(row.pit()) - row.width());
878 row.addSpace(i, add, *fi, par.lookupChange(i));
879 } else if (c == '\t')
880 row.addSpace(i, theFontMetrics(*fi).width(from_ascii(" ")),
881 *fi, par.lookupChange(i));
882 else if (c == 0x2028 || c == 0x2029) {
884 * U+2028 LINE SEPARATOR
885 * U+2029 PARAGRAPH SEPARATOR
887 * These are special unicode characters that break
888 * lines/pragraphs. Not handling them lead to trouble wrt
889 * Qt QTextLayout formatting. We add a visible character
890 * on screen so that the user can see that something is
894 // ⤶ U+2936 ARROW POINTING DOWNWARDS THEN CURVING LEFTWARDS
895 // ¶ U+00B6 PILCROW SIGN
896 char_type const screen_char = (c == 0x2028) ? 0x2936 : 0x00B6;
897 row.add(i, screen_char, *fi, par.lookupChange(i));
899 // FIXME: please someone fix the Hebrew/Arabic parenthesis mess!
900 // see also Paragraph::getUChar.
901 if (fi->language()->lang() == "hebrew") {
907 row.add(i, c, *fi, par.lookupChange(i));
910 // add inline completion width
911 // draw logically behind the previous character
912 if (ic_pos == i + 1 && !bv_->inlineCompletion().empty()) {
913 docstring const comp = bv_->inlineCompletion();
914 size_t const uniqueTo =bv_->inlineCompletionUniqueChars();
918 f.fontInfo().setColor(Color_inlinecompletion);
919 row.addVirtual(i + 1, comp.substr(0, uniqueTo), f, Change());
921 f.fontInfo().setColor(Color_nonunique_inlinecompletion);
922 row.addVirtual(i + 1, comp.substr(uniqueTo), f, Change());
925 // Handle some situations that abruptly terminate the row
927 // - Before a display inset
928 // - After a display inset
929 Inset const * inset = 0;
930 if (par.isNewline(i) || par.isEnvSeparator(i)
931 || (i + 1 < end && (inset = par.getInset(i + 1))
933 || (!row.empty() && row.back().inset
934 && row.back().inset->display())) {
936 need_new_row = par.isNewline(i);
947 // End of paragraph marker. The logic here is almost the
948 // same as in redoParagraph, remember keep them in sync.
949 ParagraphList const & pars = text_->paragraphs();
950 if (lyxrc.paragraph_markers && !need_new_row
951 && i == end && size_type(row.pit() + 1) < pars.size()) {
952 // add a virtual element for the end-of-paragraph
953 // marker; it is shown on screen, but does not exist
955 Font f(text_->layoutFont(row.pit()));
956 f.fontInfo().setColor(Color_paragraphmarker);
957 BufferParams const & bparams
958 = text_->inset().buffer().params();
959 f.setLanguage(par.getParLanguage(bparams));
960 // ¶ U+00B6 PILCROW SIGN
961 row.addVirtual(end, docstring(1, char_type(0x00B6)), f, Change());
964 // Is there a end-of-paragaph change?
965 if (i == end && par.lookupChange(end).changed() && !need_new_row)
966 row.needsChangeBar(true);
968 // if the row is too large, try to cut at last separator. In case
969 // of success, reset indication that the row was broken abruptly.
970 int const next_width = max_width_ - leftMargin(row.pit(), row.endpos())
971 - rightMargin(row.pit());
973 if (row.shortenIfNeeded(body_pos, width, next_width))
975 row.right_boundary(!row.empty() && row.endpos() < end
976 && row.back().endpos == row.endpos());
977 // Last row in paragraph is flushed
978 if (row.endpos() == end)
981 // make sure that the RTL elements are in reverse ordering
982 row.reverseRTL(is_rtl);
983 //LYXERR0("breakrow: row is " << row);
988 int TextMetrics::parTopSpacing(pit_type const pit) const
990 Paragraph const & par = text_->getPar(pit);
991 Layout const & layout = par.layout();
994 ParagraphList const & pars = text_->paragraphs();
995 double const dh = defaultRowHeight();
997 BufferParams const & bparams = bv_->buffer().params();
998 Inset const & inset = text_->inset();
999 // some parskips VERY EASY IMPLEMENTATION
1000 if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
1001 && !inset.getLayout().parbreakIsNewline()
1002 && !par.layout().parbreak_is_newline
1004 && ((layout.isParagraph() && par.getDepth() == 0)
1005 || (pars[pit - 1].layout().isParagraph()
1006 && pars[pit - 1].getDepth() == 0))) {
1007 asc += bparams.getDefSkip().inPixels(*bv_);
1010 if (par.params().startOfAppendix())
1013 // special code for the top label
1014 if (layout.labelIsAbove()
1015 && (!layout.isParagraphGroup() || text_->isFirstInSequence(pit))
1016 && !par.labelString().empty()) {
1017 FontInfo labelfont = text_->labelFont(par);
1018 FontMetrics const & lfm = theFontMetrics(labelfont);
1019 asc += int(lfm.maxHeight() * layout.spacing.getValue()
1020 * text_->spacing(par)
1021 + (layout.topsep + layout.labelbottomsep) * dh);
1024 // Add the layout spaces, for example before and after
1025 // a section, or between the items of a itemize or enumerate
1028 pit_type prev = text_->depthHook(pit, par.getDepth());
1029 Paragraph const & prevpar = pars[prev];
1030 double layoutasc = 0;
1032 && prevpar.layout() == layout
1033 && prevpar.getDepth() == par.getDepth()
1034 && prevpar.getLabelWidthString() == par.getLabelWidthString()) {
1035 layoutasc = layout.itemsep * dh;
1036 } else if (pit != 0 && layout.topsep > 0)
1037 layoutasc = layout.topsep * dh;
1039 asc += int(layoutasc * 2 / (2 + pars[pit].getDepth()));
1041 prev = text_->outerHook(pit);
1042 if (prev != pit_type(pars.size())) {
1043 asc += int(pars[prev].layout().parsep * dh);
1044 } else if (pit != 0) {
1045 Paragraph const & prevpar2 = pars[pit - 1];
1046 if (prevpar2.getDepth() != 0 || prevpar2.layout() == layout)
1047 asc += int(layout.parsep * dh);
1054 int TextMetrics::parBottomSpacing(pit_type const pit) const
1056 double layoutdesc = 0;
1057 ParagraphList const & pars = text_->paragraphs();
1058 double const dh = defaultRowHeight();
1060 // add the layout spaces, for example before and after
1061 // a section, or between the items of a itemize or enumerate
1063 pit_type nextpit = pit + 1;
1064 if (nextpit != pit_type(pars.size())) {
1065 pit_type cpit = pit;
1067 if (pars[cpit].getDepth() > pars[nextpit].getDepth()) {
1068 double usual = pars[cpit].layout().bottomsep * dh;
1070 cpit = text_->depthHook(cpit, pars[nextpit].getDepth());
1071 if (pars[cpit].layout() != pars[nextpit].layout()
1072 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
1073 unusual = pars[cpit].layout().bottomsep * dh;
1074 layoutdesc = max(unusual, usual);
1075 } else if (pars[cpit].getDepth() == pars[nextpit].getDepth()) {
1076 if (pars[cpit].layout() != pars[nextpit].layout()
1077 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
1078 layoutdesc = int(pars[cpit].layout().bottomsep * dh);
1082 return int(layoutdesc * 2 / (2 + pars[pit].getDepth()));
1086 void TextMetrics::setRowHeight(Row & row) const
1088 Paragraph const & par = text_->getPar(row.pit());
1089 Layout const & layout = par.layout();
1090 double const spacing_val = layout.spacing.getValue() * text_->spacing(par);
1092 // Initial value for ascent (useful if row is empty).
1093 Font const font = displayFont(row.pit(), row.pos());
1094 FontMetrics const & fm = theFontMetrics(font);
1095 int maxasc = int(fm.maxAscent() * spacing_val);
1096 int maxdes = int(fm.maxDescent() * spacing_val);
1098 // Find the ascent/descent of the row contents
1099 for (Row::Element const & e : row) {
1101 maxasc = max(maxasc, e.dim.ascent());
1102 maxdes = max(maxdes, e.dim.descent());
1104 FontMetrics const & fm2 = theFontMetrics(e.font);
1105 maxasc = max(maxasc, int(fm2.maxAscent() * spacing_val));
1106 maxdes = max(maxdes, int(fm2.maxDescent() * spacing_val));
1110 // This is nicer with box insets
1114 row.dimension().asc = maxasc;
1115 row.dimension().des = maxdes;
1119 // x is an absolute screen coord
1120 // returns the column near the specified x-coordinate of the row
1121 // x is set to the real beginning of this column
1122 pos_type TextMetrics::getPosNearX(Row const & row, int & x,
1123 bool & boundary) const
1125 //LYXERR0("getPosNearX(" << x << ") row=" << row);
1126 /// For the main Text, it is possible that this pit is not
1127 /// yet in the CoordCache when moving cursor up.
1128 /// x Paragraph coordinate is always 0 for main text anyway.
1129 int const xo = origin_.x_;
1132 // Adapt to cursor row scroll offset if applicable.
1133 int const offset = bv_->horizScrollOffset(text_, row.pit(), row.pos());
1136 pos_type pos = row.pos();
1139 x = row.left_margin;
1140 else if (x <= row.left_margin) {
1141 pos = row.front().left_pos();
1142 x = row.left_margin;
1143 } else if (x >= row.width()) {
1144 pos = row.back().right_pos();
1147 double w = row.left_margin;
1148 Row::const_iterator cit = row.begin();
1149 Row::const_iterator cend = row.end();
1150 for ( ; cit != cend; ++cit) {
1151 if (w <= x && w + cit->full_width() > x) {
1152 int x_offset = int(x - w);
1153 pos = cit->x2pos(x_offset);
1154 x = int(x_offset + w);
1157 w += cit->full_width();
1159 if (cit == row.end()) {
1160 pos = row.back().right_pos();
1163 /** This tests for the case where the cursor is placed
1164 * just before a font direction change. See comment on
1165 * the boundary_ member in DocIterator.h to understand
1166 * how boundary helps here.
1168 else if (pos == cit->endpos
1169 && ((!cit->isRTL() && cit + 1 != row.end()
1170 && (cit + 1)->isRTL())
1171 || (cit->isRTL() && cit != row.begin()
1172 && !(cit - 1)->isRTL())))
1176 /** This tests for the case where the cursor is set at the end
1177 * of a row which has been broken due something else than a
1178 * separator (a display inset or a forced breaking of the
1179 * row). We know that there is a separator when the end of the
1180 * row is larger than the end of its last element.
1182 if (!row.empty() && pos == row.back().endpos
1183 && row.back().endpos == row.endpos()) {
1184 Inset const * inset = row.back().inset;
1185 if (inset && (inset->lyxCode() == NEWLINE_CODE
1186 || inset->lyxCode() == SEPARATOR_CODE))
1187 pos = row.back().pos;
1189 boundary = row.right_boundary();
1193 //LYXERR0("getPosNearX ==> pos=" << pos << ", boundary=" << boundary);
1199 pos_type TextMetrics::x2pos(pit_type pit, int row, int x) const
1201 // We play safe and use parMetrics(pit) to make sure the
1202 // ParagraphMetrics will be redone and OK to use if needed.
1203 // Otherwise we would use an empty ParagraphMetrics in
1204 // upDownInText() while in selection mode.
1205 ParagraphMetrics const & pm = parMetrics(pit);
1207 LBUFERR(row < int(pm.rows().size()));
1209 Row const & r = pm.rows()[row];
1210 return getPosNearX(r, x, bound);
1214 void TextMetrics::newParMetricsDown()
1216 pair<pit_type, ParagraphMetrics> const & last = *par_metrics_.rbegin();
1217 pit_type const pit = last.first + 1;
1218 if (pit == int(text_->paragraphs().size()))
1221 // do it and update its position.
1223 par_metrics_[pit].setPosition(last.second.position()
1224 + last.second.descent() + par_metrics_[pit].ascent());
1225 updatePosCache(pit);
1229 void TextMetrics::newParMetricsUp()
1231 pair<pit_type, ParagraphMetrics> const & first = *par_metrics_.begin();
1232 if (first.first == 0)
1235 pit_type const pit = first.first - 1;
1236 // do it and update its position.
1238 par_metrics_[pit].setPosition(first.second.position()
1239 - first.second.ascent() - par_metrics_[pit].descent());
1240 updatePosCache(pit);
1243 // y is screen coordinate
1244 pit_type TextMetrics::getPitNearY(int y)
1246 LASSERT(!text_->paragraphs().empty(), return -1);
1247 LASSERT(!par_metrics_.empty(), return -1);
1248 LYXERR(Debug::DEBUG, "y: " << y << " cache size: " << par_metrics_.size());
1250 // look for highest numbered paragraph with y coordinate less than given y
1253 ParMetricsCache::const_iterator it = par_metrics_.begin();
1254 ParMetricsCache::const_iterator et = par_metrics_.end();
1255 ParMetricsCache::const_iterator last = et;
1258 ParagraphMetrics const & pm = it->second;
1260 if (y < it->second.position() - int(pm.ascent())) {
1261 // We are looking for a position that is before the first paragraph in
1262 // the cache (which is in priciple off-screen, that is before the
1265 // We are already at the first paragraph in the inset.
1267 // OK, this is the paragraph we are looking for.
1268 pit = it->first - 1;
1273 ParagraphMetrics const & pm_last = par_metrics_[last->first];
1275 if (y >= last->second.position() + int(pm_last.descent())) {
1276 // We are looking for a position that is after the last paragraph in
1277 // the cache (which is in priciple off-screen), that is before the
1279 pit = last->first + 1;
1280 if (pit == int(text_->paragraphs().size()))
1281 // We are already at the last paragraph in the inset.
1283 // OK, this is the paragraph we are looking for.
1284 newParMetricsDown();
1288 for (; it != et; ++it) {
1289 LYXERR(Debug::DEBUG, "examining: pit: " << it->first
1290 << " y: " << it->second.position());
1292 ParagraphMetrics const & pm2 = par_metrics_[it->first];
1294 if (it->first >= pit && int(it->second.position()) - int(pm2.ascent()) <= y) {
1296 yy = it->second.position();
1300 LYXERR(Debug::DEBUG, "found best y: " << yy << " for pit: " << pit);
1306 Row const & TextMetrics::getPitAndRowNearY(int & y, pit_type & pit,
1307 bool assert_in_view, bool up)
1309 ParagraphMetrics const & pm = par_metrics_[pit];
1311 int yy = pm.position() - pm.ascent();
1312 LBUFERR(!pm.rows().empty());
1313 RowList::const_iterator rit = pm.rows().begin();
1314 RowList::const_iterator rlast = pm.rows().end();
1316 for (; rit != rlast; yy += rit->height(), ++rit)
1317 if (yy + rit->height() > y)
1320 if (assert_in_view) {
1321 if (!up && yy + rit->height() > y) {
1322 if (rit != pm.rows().begin()) {
1325 } else if (pit != 0) {
1328 ParagraphMetrics const & pm2 = par_metrics_[pit];
1329 rit = pm2.rows().end();
1333 } else if (up && yy != y) {
1335 y = yy + rit->height();
1337 } else if (pit < int(text_->paragraphs().size()) - 1) {
1339 newParMetricsDown();
1340 ParagraphMetrics const & pm2 = par_metrics_[pit];
1341 rit = pm2.rows().begin();
1350 // x,y are absolute screen coordinates
1351 // sets cursor recursively descending into nested editable insets
1352 Inset * TextMetrics::editXY(Cursor & cur, int x, int y,
1353 bool assert_in_view, bool up)
1355 if (lyxerr.debugging(Debug::WORKAREA)) {
1356 LYXERR0("TextMetrics::editXY(cur, " << x << ", " << y << ")");
1357 cur.bv().coordCache().dump();
1359 pit_type pit = getPitNearY(y);
1360 LASSERT(pit != -1, return 0);
1361 Row const & row = getPitAndRowNearY(y, pit, assert_in_view, up);
1364 // Do we cover an inset?
1365 InsetList::Element * e = checkInsetHit(pit, x, y);
1368 // No inset, set position in the text
1369 bool bound = false; // is modified by getPosNearX
1370 cur.pos() = getPosNearX(row, x, bound);
1371 cur.boundary(bound);
1372 cur.setCurrentFont();
1377 Inset * inset = e->inset;
1378 //lyxerr << "inset " << inset << " hit at x: " << x << " y: " << y << endl;
1380 // Set position in front of inset
1382 cur.boundary(false);
1385 // Try to descend recursively inside the inset.
1386 Inset * edited = inset->editXY(cur, x, y);
1387 // FIXME: it is not clear that the test on position is needed
1388 // Remove it if/when semantics of editXY is clarified
1389 if (cur.text() == text_ && cur.pos() == e->pos) {
1390 // non-editable inset, set cursor after the inset if x is
1391 // nearer to that position (bug 9628)
1392 bool bound = false; // is modified by getPosNearX
1393 cur.pos() = getPosNearX(row, x, bound);
1394 cur.boundary(bound);
1395 cur.setCurrentFont();
1399 if (cur.top().text() == text_)
1400 cur.setCurrentFont();
1405 void TextMetrics::setCursorFromCoordinates(Cursor & cur, int const x, int const y)
1407 LASSERT(text_ == cur.text(), return);
1408 pit_type const pit = getPitNearY(y);
1409 LASSERT(pit != -1, return);
1411 ParagraphMetrics const & pm = par_metrics_[pit];
1413 int yy = pm.position() - pm.ascent();
1414 LYXERR(Debug::DEBUG, "x: " << x << " y: " << y <<
1415 " pit: " << pit << " yy: " << yy);
1418 LBUFERR(pm.rows().size());
1419 for (; r < int(pm.rows().size()) - 1; ++r) {
1420 Row const & row = pm.rows()[r];
1421 if (int(yy + row.height()) > y)
1426 Row const & row = pm.rows()[r];
1428 LYXERR(Debug::DEBUG, "row " << r << " from pos: " << row.pos());
1432 pos_type const pos = getPosNearX(row, xx, bound);
1434 LYXERR(Debug::DEBUG, "setting cursor pit: " << pit << " pos: " << pos);
1436 text_->setCursor(cur, pit, pos, true, bound);
1437 // remember new position.
1442 //takes screen x,y coordinates
1443 InsetList::Element * TextMetrics::checkInsetHit(pit_type pit, int x, int y)
1445 Paragraph const & par = text_->paragraphs()[pit];
1446 CoordCache::Insets const & insetCache = bv_->coordCache().getInsets();
1448 LYXERR(Debug::DEBUG, "x: " << x << " y: " << y << " pit: " << pit);
1450 for (InsetList::Element const & e : par.insetList()) {
1451 LYXERR(Debug::DEBUG, "examining inset " << e.inset);
1453 if (insetCache.covers(e.inset, x, y)) {
1454 LYXERR(Debug::DEBUG, "Hit inset: " << e.inset);
1455 return const_cast<InsetList::Element *>(&e);
1459 LYXERR(Debug::DEBUG, "No inset hit. ");
1464 //takes screen x,y coordinates
1465 Inset * TextMetrics::checkInsetHit(int x, int y)
1467 pit_type const pit = getPitNearY(y);
1468 LASSERT(pit != -1, return 0);
1469 InsetList::Element * e = checkInsetHit(pit, x, y);
1478 int TextMetrics::cursorX(CursorSlice const & sl,
1479 bool boundary) const
1481 LASSERT(sl.text() == text_, return 0);
1483 ParagraphMetrics const & pm = par_metrics_[sl.pit()];
1484 if (pm.rows().empty())
1486 Row const & row = pm.getRow(sl.pos(), boundary);
1487 pos_type const pos = sl.pos();
1490 row.findElement(pos, boundary, x);
1496 int TextMetrics::cursorY(CursorSlice const & sl, bool boundary) const
1498 //lyxerr << "TextMetrics::cursorY: boundary: " << boundary << endl;
1499 ParagraphMetrics const & pm = parMetrics(sl.pit());
1500 if (pm.rows().empty())
1504 h -= parMetrics(0).rows()[0].ascent();
1505 for (pit_type pit = 0; pit < sl.pit(); ++pit) {
1506 h += parMetrics(pit).height();
1509 if (pos && boundary)
1511 size_t const rend = pm.pos2row(pos);
1512 for (size_t rit = 0; rit != rend; ++rit)
1513 h += pm.rows()[rit].height();
1514 h += pm.rows()[rend].ascent();
1519 // the cursor set functions have a special mechanism. When they
1520 // realize you left an empty paragraph, they will delete it.
1522 bool TextMetrics::cursorHome(Cursor & cur)
1524 LASSERT(text_ == cur.text(), return false);
1525 ParagraphMetrics const & pm = par_metrics_[cur.pit()];
1526 Row const & row = pm.getRow(cur.pos(),cur.boundary());
1527 return text_->setCursor(cur, cur.pit(), row.pos());
1531 bool TextMetrics::cursorEnd(Cursor & cur)
1533 LASSERT(text_ == cur.text(), return false);
1534 // if not on the last row of the par, put the cursor before
1535 // the final space exept if I have a spanning inset or one string
1536 // is so long that we force a break.
1537 pos_type end = cur.textRow().endpos();
1539 // empty text, end-1 is no valid position
1541 bool boundary = false;
1542 if (end != cur.lastpos()) {
1543 if (!cur.paragraph().isLineSeparator(end-1)
1544 && !cur.paragraph().isNewline(end-1)
1545 && !cur.paragraph().isEnvSeparator(end-1))
1549 } else if (cur.paragraph().isEnvSeparator(end-1))
1551 return text_->setCursor(cur, cur.pit(), end, true, boundary);
1555 void TextMetrics::deleteLineForward(Cursor & cur)
1557 LASSERT(text_ == cur.text(), return);
1558 if (cur.lastpos() == 0) {
1559 // Paragraph is empty, so we just go forward
1560 text_->cursorForward(cur);
1563 cur.selection(true); // to avoid deletion
1566 // What is this test for ??? (JMarc)
1567 if (!cur.selection())
1568 text_->deleteWordForward(cur);
1570 cap::cutSelection(cur, true, false);
1571 cur.checkBufferStructure();
1576 bool TextMetrics::isLastRow(Row const & row) const
1578 ParagraphList const & pars = text_->paragraphs();
1579 return row.endpos() >= pars[row.pit()].size()
1580 && row.pit() + 1 == pit_type(pars.size());
1584 bool TextMetrics::isFirstRow(Row const & row) const
1586 return row.pos() == 0 && row.pit() == 0;
1590 int TextMetrics::leftMargin(pit_type pit) const
1592 return leftMargin(pit, text_->paragraphs()[pit].size());
1596 int TextMetrics::leftMargin(pit_type const pit, pos_type const pos) const
1598 ParagraphList const & pars = text_->paragraphs();
1600 LASSERT(pit >= 0, return 0);
1601 LASSERT(pit < int(pars.size()), return 0);
1602 Paragraph const & par = pars[pit];
1603 LASSERT(pos >= 0, return 0);
1604 LASSERT(pos <= par.size(), return 0);
1605 Buffer const & buffer = bv_->buffer();
1606 //lyxerr << "TextMetrics::leftMargin: pit: " << pit << " pos: " << pos << endl;
1607 DocumentClass const & tclass = buffer.params().documentClass();
1608 Layout const & layout = par.layout();
1609 FontMetrics const & bfm = theFontMetrics(buffer.params().getFont());
1611 docstring parindent = layout.parindent;
1615 if (text_->isMainText())
1616 l_margin += bv_->leftMargin();
1618 l_margin += bfm.signedWidth(tclass.leftmargin());
1620 int depth = par.getDepth();
1622 // find the next level paragraph
1623 pit_type newpar = text_->outerHook(pit);
1624 if (newpar != pit_type(pars.size())) {
1625 if (pars[newpar].layout().isEnvironment()) {
1626 int nestmargin = depth * nestMargin();
1627 if (text_->isMainText())
1628 nestmargin += changebarMargin();
1629 l_margin = max(leftMargin(newpar), nestmargin);
1630 // Remove the parindent that has been added
1631 // if the paragraph was empty.
1632 if (pars[newpar].empty() &&
1633 buffer.params().paragraph_separation ==
1634 BufferParams::ParagraphIndentSeparation) {
1635 docstring pi = pars[newpar].layout().parindent;
1636 l_margin -= bfm.signedWidth(pi);
1639 if (tclass.isDefaultLayout(par.layout())
1640 || tclass.isPlainLayout(par.layout())) {
1641 if (pars[newpar].params().noindent())
1644 parindent = pars[newpar].layout().parindent;
1649 // This happens after sections or environments in standard classes.
1650 // We have to check the previous layout at same depth.
1651 if (buffer.params().paragraph_separation ==
1652 BufferParams::ParagraphSkipSeparation)
1654 else if (pit > 0 && pars[pit - 1].getDepth() >= par.getDepth()) {
1655 pit_type prev = text_->depthHook(pit, par.getDepth());
1656 if (par.layout() == pars[prev].layout()) {
1658 && pars[pit - 1].layout().nextnoindent)
1660 } else if (pars[prev].layout().nextnoindent)
1664 FontInfo const labelfont = text_->labelFont(par);
1665 FontMetrics const & lfm = theFontMetrics(labelfont);
1667 switch (layout.margintype) {
1668 case MARGIN_DYNAMIC:
1669 if (!layout.leftmargin.empty()) {
1670 l_margin += bfm.signedWidth(layout.leftmargin);
1672 if (!par.labelString().empty()) {
1673 l_margin += lfm.signedWidth(layout.labelindent);
1674 l_margin += lfm.width(par.labelString());
1675 l_margin += lfm.width(layout.labelsep);
1679 case MARGIN_MANUAL: {
1680 l_margin += lfm.signedWidth(layout.labelindent);
1681 // The width of an empty par, even with manual label, should be 0
1682 if (!par.empty() && pos >= par.beginOfBody()) {
1683 if (!par.getLabelWidthString().empty()) {
1684 docstring labstr = par.getLabelWidthString();
1685 l_margin += lfm.width(labstr);
1686 l_margin += lfm.width(layout.labelsep);
1692 case MARGIN_STATIC: {
1693 l_margin += bfm.signedWidth(layout.leftmargin) * 4
1694 / (par.getDepth() + 4);
1698 case MARGIN_FIRST_DYNAMIC:
1699 if (layout.labeltype == LABEL_MANUAL) {
1700 // if we are at position 0, we are never in the body
1701 if (pos > 0 && pos >= par.beginOfBody())
1702 l_margin += lfm.signedWidth(layout.leftmargin);
1704 l_margin += lfm.signedWidth(layout.labelindent);
1706 // Special case to fix problems with
1708 || (layout.labeltype == LABEL_STATIC
1709 && layout.latextype == LATEX_ENVIRONMENT
1710 && !text_->isFirstInSequence(pit))) {
1711 l_margin += lfm.signedWidth(layout.leftmargin);
1712 } else if (!layout.labelIsAbove()) {
1713 l_margin += lfm.signedWidth(layout.labelindent);
1714 l_margin += lfm.width(layout.labelsep);
1715 l_margin += lfm.width(par.labelString());
1719 case MARGIN_RIGHT_ADDRESS_BOX: {
1721 // The left margin depends on the widest row in this paragraph.
1722 // This code is wrong because it depends on the rows, but at the
1723 // same time this function is used in redoParagraph to construct
1725 ParagraphMetrics const & pm = par_metrics_[pit];
1726 int minfill = max_width_;
1727 for (row : pm.rows())
1728 if (row.fill() < minfill)
1729 minfill = row.fill();
1730 l_margin += bfm.signedWidth(layout.leftmargin);
1731 l_margin += minfill;
1733 // also wrong, but much shorter.
1734 l_margin += max_width_ / 2;
1739 if (!par.params().leftIndent().zero())
1740 l_margin += par.params().leftIndent().inPixels(max_width_, lfm.em());
1742 LyXAlignment align = par.getAlign();
1744 // set the correct parindent
1746 && (layout.labeltype == LABEL_NO_LABEL
1747 || layout.labeltype == LABEL_ABOVE
1748 || layout.labeltype == LABEL_CENTERED
1749 || (layout.labeltype == LABEL_STATIC
1750 && layout.latextype == LATEX_ENVIRONMENT
1751 && !text_->isFirstInSequence(pit)))
1752 && (align == LYX_ALIGN_BLOCK || align == LYX_ALIGN_LEFT)
1753 && !par.params().noindent()
1754 // in some insets, paragraphs are never indented
1755 && !text_->inset().neverIndent()
1756 // display style insets are always centered, omit indentation
1759 && par.getInset(pos)->display())
1760 && (!(tclass.isDefaultLayout(par.layout())
1761 || tclass.isPlainLayout(par.layout()))
1762 || buffer.params().paragraph_separation
1763 == BufferParams::ParagraphIndentSeparation)) {
1764 /* use the parindent of the layout when the default
1765 * indentation is used otherwise use the indentation set in
1766 * the document settings
1768 if (buffer.params().getParIndent().empty())
1769 l_margin += bfm.signedWidth(parindent);
1771 l_margin += buffer.params().getParIndent().inPixels(max_width_, bfm.em());
1778 void TextMetrics::draw(PainterInfo & pi, int x, int y) const
1780 if (par_metrics_.empty())
1786 y -= par_metrics_.begin()->second.ascent();
1787 for (auto & pm_pair : par_metrics_) {
1788 pit_type const pit = pm_pair.first;
1789 ParagraphMetrics & pm = pm_pair.second;
1791 // Save the paragraph position in the cache.
1793 drawParagraph(pi, pit, x, y);
1799 void TextMetrics::drawParagraph(PainterInfo & pi, pit_type const pit, int const x, int y) const
1801 ParagraphMetrics const & pm = par_metrics_[pit];
1802 if (pm.rows().empty())
1804 size_t const nrows = pm.rows().size();
1806 // Use fast lane in nodraw stage.
1807 if (pi.pain.isNull()) {
1808 for (size_t i = 0; i != nrows; ++i) {
1810 Row const & row = pm.rows()[i];
1811 // Adapt to cursor row scroll offset if applicable.
1812 int row_x = x - bv_->horizScrollOffset(text_, pit, row.pos());
1816 RowPainter rp(pi, *text_, row, row_x, y);
1818 rp.paintOnlyInsets();
1824 int const ww = bv_->workHeight();
1825 Cursor const & cur = bv_->cursor();
1826 DocIterator sel_beg = cur.selectionBegin();
1827 DocIterator sel_end = cur.selectionEnd();
1828 bool selection = cur.selection()
1829 // This is our text.
1830 && cur.text() == text_
1831 // if the anchor is outside, this is not our selection
1832 && cur.normalAnchor().text() == text_
1833 && pit >= sel_beg.pit() && pit <= sel_end.pit();
1835 // We store the begin and end pos of the selection relative to this par
1836 DocIterator sel_beg_par = cur.selectionBegin();
1837 DocIterator sel_end_par = cur.selectionEnd();
1839 // We care only about visible selection.
1841 if (pit != sel_beg.pit()) {
1842 sel_beg_par.pit() = pit;
1843 sel_beg_par.pos() = 0;
1845 if (pit != sel_end.pit()) {
1846 sel_end_par.pit() = pit;
1847 sel_end_par.pos() = sel_end_par.lastpos();
1851 for (size_t i = 0; i != nrows; ++i) {
1853 Row const & row = pm.rows()[i];
1854 // Adapt to cursor row scroll offset if applicable.
1855 int row_x = x - bv_->horizScrollOffset(text_, pit, row.pos());
1859 // It is not needed to draw on screen if we are not inside.
1860 bool const inside = (y + row.descent() >= 0
1861 && y - row.ascent() < ww);
1863 // Inset positions have already been set in nodraw stage.
1869 row.setSelectionAndMargins(sel_beg_par, sel_end_par);
1871 row.clearSelectionAndMargins();
1873 // The row knows nothing about the paragraph, so we have to check
1874 // whether this row is the first or last and update the margins.
1875 if (row.selection()) {
1876 if (row.sel_beg == 0)
1877 row.change(row.begin_margin_sel, sel_beg.pit() < pit);
1878 if (row.sel_end == sel_end_par.lastpos())
1879 row.change(row.end_margin_sel, sel_end.pit() > pit);
1882 // has row changed since last paint?
1883 bool row_has_changed = row.changed()
1884 || bv_->hadHorizScrollOffset(text_, pit, row.pos());
1886 // Take this opportunity to spellcheck the row contents.
1887 if (row_has_changed && pi.do_spellcheck && lyxrc.spellcheck_continuously) {
1888 text_->getPar(pit).spellCheck();
1891 RowPainter rp(pi, *text_, row, row_x, y);
1893 // Don't paint the row if a full repaint has not been requested
1894 // and if it has not changed.
1895 if (!pi.full_repaint && !row_has_changed) {
1896 // Paint only the insets if the text itself is
1898 rp.paintOnlyInsets();
1904 // Clear background of this row if paragraph background was not
1905 // already cleared because of a full repaint.
1906 if (!pi.full_repaint && row_has_changed) {
1907 LYXERR(Debug::PAINTING, "Clear rect@("
1908 << max(row_x, 0) << ", " << y - row.ascent() << ")="
1909 << width() << " x " << row.height());
1910 // FIXME: this is a hack. We know that at least this
1911 // amount of pixels can be cleared on right and left.
1912 // Doing so gets rid of caret ghosts when the cursor is at
1913 // the begining/end of row. However, it will not work if
1914 // the caret has a ridiculous width like 6. (see ticket
1916 pi.pain.fillRectangle(max(row_x, 0) - Inset::TEXT_TO_INSET_OFFSET,
1918 width() + 2 * Inset::TEXT_TO_INSET_OFFSET,
1919 row.height(), pi.background_color);
1922 // Instrumentation for testing row cache (see also
1924 if (lyxerr.debugging(Debug::PAINTING)
1925 && (row.selection() || pi.full_repaint || row_has_changed)) {
1926 string const foreword = text_->isMainText() ? "main text redraw "
1927 : "inset text redraw: ";
1928 LYXERR0(foreword << "pit=" << pit << " row=" << i
1929 << (row.selection() ? " row_selection": "")
1930 << (pi.full_repaint ? " full_repaint" : "")
1931 << (row_has_changed ? " row_has_changed" : ""));
1934 // Backup full_repaint status and force full repaint
1935 // for inner insets as the Row has been cleared out.
1936 bool tmp = pi.full_repaint;
1937 pi.full_repaint = true;
1939 rp.paintSelection();
1942 if (row.needsChangeBar())
1943 rp.paintChangeBar();
1944 if (i == 0 && !row.isRTL())
1946 if (i == nrows - 1 && row.isRTL())
1949 if (i == nrows - 1 && !row.isRTL())
1951 if (i == 0 && row.isRTL())
1953 rp.paintTooLargeMarks(row_x + row.left_x() < 0,
1954 row_x + row.right_x() > bv_->workWidth());
1958 // This debug code shows on screen which rows are repainted.
1959 // FIXME: since the updates related to caret blinking restrict
1960 // the painter to a small rectangle, the numbers are not
1961 // updated when this happens. Change the code in
1962 // GuiWorkArea::Private::show/hideCaret if this is important.
1963 static int count = 0;
1965 FontInfo fi(sane_font);
1966 fi.setSize(FONT_SIZE_TINY);
1967 fi.setColor(Color_red);
1968 pi.pain.text(row_x, y, convert<docstring>(count), fi);
1971 // Restore full_repaint status.
1972 pi.full_repaint = tmp;
1977 //LYXERR(Debug::PAINTING, ".");
1981 void TextMetrics::completionPosAndDim(Cursor const & cur, int & x, int & y,
1982 Dimension & dim) const
1984 Cursor const & bvcur = cur.bv().cursor();
1986 // get word in front of cursor
1987 docstring word = text_->previousWord(bvcur.top());
1988 DocIterator wordStart = bvcur;
1989 wordStart.pos() -= word.length();
1991 // calculate dimensions of the word
1993 row.pit(bvcur.pit());
1994 row.pos(wordStart.pos());
1995 row.endpos(bvcur.pos());
1997 dim = row.dimension();
1999 // get position on screen of the word start and end
2000 //FIXME: Is it necessary to explicitly set this to false?
2001 wordStart.boundary(false);
2002 Point lxy = cur.bv().getPos(wordStart);
2003 Point rxy = cur.bv().getPos(bvcur);
2004 dim.wid = abs(rxy.x_ - lxy.x_);
2006 // calculate position of word
2008 x = min(rxy.x_, lxy.x_);
2010 //lyxerr << "wid=" << dim.width() << " x=" << x << " y=" << y << " lxy.x_=" << lxy.x_ << " rxy.x_=" << rxy.x_ << " word=" << word << std::endl;
2011 //lyxerr << " wordstart=" << wordStart << " bvcur=" << bvcur << " cur=" << cur << std::endl;
2014 int defaultRowHeight()
2016 return int(theFontMetrics(sane_font).maxHeight() * 1.2);