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"
47 #include "support/debug.h"
48 #include "support/lassert.h"
58 using frontend::FontMetrics;
63 int numberOfLabelHfills(Paragraph const & par, Row const & row)
65 pos_type last = row.endpos() - 1;
66 pos_type first = row.pos();
68 // hfill *DO* count at the beginning of paragraphs!
70 while (first < last && par.isHfill(first))
74 last = min(last, par.beginOfBody());
76 for (pos_type p = first; p < last; ++p) {
83 // FIXME: this needs to be rewritten, probably by merging it into some
84 // code that, besides counting, sets the active status of the space
85 // inset in the row element.
86 int numberOfHfills(Row const & row, ParagraphMetrics const & pm,
87 pos_type const body_pos)
90 Row::const_iterator cit = row.begin();
91 Row::const_iterator const end = row.end();
92 for ( ; cit != end ; ++cit)
93 if (cit->pos >= body_pos
94 && cit->inset && pm.hfillExpansion(row, cit->pos))
102 /////////////////////////////////////////////////////////////////////
106 /////////////////////////////////////////////////////////////////////
109 TextMetrics::TextMetrics(BufferView * bv, Text * text)
110 : bv_(bv), text_(text)
113 max_width_ = bv_->workWidth();
114 dim_.wid = max_width_;
120 bool TextMetrics::contains(pit_type pit) const
122 return par_metrics_.find(pit) != par_metrics_.end();
126 ParagraphMetrics const & TextMetrics::parMetrics(pit_type pit) const
128 return const_cast<TextMetrics *>(this)->parMetrics(pit, true);
133 pair<pit_type, ParagraphMetrics const *> TextMetrics::first() const
135 ParMetricsCache::const_iterator it = par_metrics_.begin();
136 return make_pair(it->first, &it->second);
140 pair<pit_type, ParagraphMetrics const *> TextMetrics::last() const
142 LBUFERR(!par_metrics_.empty());
143 ParMetricsCache::const_reverse_iterator it = par_metrics_.rbegin();
144 return make_pair(it->first, &it->second);
148 ParagraphMetrics & TextMetrics::parMetrics(pit_type pit, bool redo)
150 ParMetricsCache::iterator pmc_it = par_metrics_.find(pit);
151 if (pmc_it == par_metrics_.end()) {
152 pmc_it = par_metrics_.insert(
153 make_pair(pit, ParagraphMetrics(text_->getPar(pit)))).first;
155 if (pmc_it->second.rows().empty() && redo)
157 return pmc_it->second;
161 bool TextMetrics::metrics(MetricsInfo & mi, Dimension & dim, int min_width)
163 LBUFERR(mi.base.textwidth > 0);
164 max_width_ = mi.base.textwidth;
165 // backup old dimension.
166 Dimension const old_dim = dim_;
169 dim_.wid = min_width;
170 pit_type const npar = text_->paragraphs().size();
172 // If there is more than one row, expand the text to
173 // the full allowable width.
174 dim_.wid = max_width_;
176 //lyxerr << "TextMetrics::metrics: width: " << mi.base.textwidth
177 // << " maxWidth: " << max_width_ << "\nfont: " << mi.base.font << endl;
179 bool changed = false;
181 for (pit_type pit = 0; pit != npar; ++pit) {
182 changed |= redoParagraph(pit);
183 ParagraphMetrics const & pm = par_metrics_[pit];
185 if (dim_.wid < pm.width())
186 dim_.wid = pm.width();
189 dim_.asc = par_metrics_[0].ascent();
190 dim_.des = h - dim_.asc;
191 //lyxerr << "dim_.wid " << dim_.wid << endl;
192 //lyxerr << "dim_.asc " << dim_.asc << endl;
193 //lyxerr << "dim_.des " << dim_.des << endl;
195 changed |= dim_ != old_dim;
201 int TextMetrics::rightMargin(ParagraphMetrics const & pm) const
203 return text_->isMainText() ? pm.rightMargin(*bv_) : 0;
207 int TextMetrics::rightMargin(pit_type const pit) const
209 return text_->isMainText() ? par_metrics_[pit].rightMargin(*bv_) : 0;
213 void TextMetrics::applyOuterFont(Font & font) const
215 FontInfo lf(font_.fontInfo());
216 lf.reduce(bv_->buffer().params().getFont().fontInfo());
217 font.fontInfo().realize(lf);
221 Font TextMetrics::displayFont(pit_type pit, pos_type pos) const
223 LASSERT(pos >= 0, { static Font f; return f; });
225 ParagraphList const & pars = text_->paragraphs();
226 Paragraph const & par = pars[pit];
227 Layout const & layout = par.layout();
228 Buffer const & buffer = bv_->buffer();
230 BufferParams const & params = buffer.params();
231 pos_type const body_pos = par.beginOfBody();
233 // We specialize the 95% common case:
234 if (!par.getDepth()) {
235 Font f = par.getFontSettings(params, pos);
236 if (!text_->isMainText())
238 bool lab = layout.labeltype == LABEL_MANUAL && pos < body_pos;
240 FontInfo const & lf = lab ? layout.labelfont : layout.font;
241 FontInfo rlf = lab ? layout.reslabelfont : layout.resfont;
243 // In case the default family has been customized
244 if (lf.family() == INHERIT_FAMILY)
245 rlf.setFamily(params.getFont().fontInfo().family());
246 f.fontInfo().realize(rlf);
250 // The uncommon case need not be optimized as much
251 FontInfo const & layoutfont = pos < body_pos ?
252 layout.labelfont : layout.font;
254 Font font = par.getFontSettings(params, pos);
255 font.fontInfo().realize(layoutfont);
257 if (!text_->isMainText())
258 applyOuterFont(font);
260 // Realize against environment font information
261 // NOTE: the cast to pit_type should be removed when pit_type
262 // changes to a unsigned integer.
263 if (pit < pit_type(pars.size()))
264 font.fontInfo().realize(text_->outerFont(pit).fontInfo());
266 // Realize with the fonts of lesser depth.
267 font.fontInfo().realize(params.getFont().fontInfo());
273 bool TextMetrics::isRTL(CursorSlice const & sl, bool boundary) const
279 if (boundary && sl.pos() > 0)
282 return displayFont(sl.pit(), sl.pos() + correction).isVisibleRightToLeft();
286 bool TextMetrics::isRTLBoundary(pit_type pit, pos_type pos) const
288 // no RTL boundary at paragraph start
292 Font const & left_font = displayFont(pit, pos - 1);
294 return isRTLBoundary(pit, pos, left_font);
298 // isRTLBoundary returns false on a real end-of-line boundary,
299 // because otherwise the two boundary types get mixed up.
300 // This is the whole purpose of this being in TextMetrics.
301 bool TextMetrics::isRTLBoundary(pit_type pit, pos_type pos,
302 Font const & font) const
304 if (// no RTL boundary at paragraph start
306 // if the metrics have not been calculated, then we are not
307 // on screen and can safely ignore issues about boundaries.
311 ParagraphMetrics & pm = par_metrics_[pit];
312 // no RTL boundary in empty paragraph
313 if (pm.rows().empty())
316 pos_type endpos = pm.getRow(pos - 1, false).endpos();
317 pos_type startpos = pm.getRow(pos, false).pos();
318 // no RTL boundary at line start:
319 // abc\n -> toggle to RTL -> abc\n (and not: abc\n|
321 if (pos == startpos && pos == endpos) // start of cur row, end of prev row
324 Paragraph const & par = text_->getPar(pit);
325 // no RTL boundary at line break:
326 // abc|\n -> move right -> abc\n (and not: abc\n|
328 if (startpos == pos && endpos == pos && endpos != par.size()
329 && (par.isNewline(pos - 1)
330 || par.isEnvSeparator(pos - 1)
331 || par.isLineSeparator(pos - 1)
332 || par.isSeparator(pos - 1)))
335 bool left = font.isVisibleRightToLeft();
337 if (pos == par.size())
338 right = par.isRTL(bv_->buffer().params());
340 right = displayFont(pit, pos).isVisibleRightToLeft();
342 return left != right;
346 bool TextMetrics::redoParagraph(pit_type const pit)
348 Paragraph & par = text_->getPar(pit);
349 // IMPORTANT NOTE: We pass 'false' explicitly in order to not call
350 // redoParagraph() recursively inside parMetrics.
351 Dimension old_dim = parMetrics(pit, false).dim();
352 ParagraphMetrics & pm = par_metrics_[pit];
355 Buffer & buffer = bv_->buffer();
356 bool changed = false;
358 // Check whether there are InsetBibItems that need fixing
359 // FIXME: This check ought to be done somewhere else. It is the reason
360 // why text_ is not const. But then, where else to do it?
361 // Well, how can you end up with either (a) a biblio environment that
362 // has no InsetBibitem or (b) a biblio environment with more than one
363 // InsetBibitem? I think the answer is: when paragraphs are merged;
364 // when layout is set; when material is pasted.
365 if (par.brokenBiblio()) {
366 Cursor & cur = const_cast<Cursor &>(bv_->cursor());
367 // In some cases, we do not know how to record undo
368 if (&cur.inset() == &text_->inset())
369 cur.recordUndo(pit, pit);
371 int const moveCursor = par.fixBiblio(buffer);
373 // Is it necessary to update the cursor?
374 if (&cur.inset() == &text_->inset() && cur.pit() == pit) {
377 else if (moveCursor < 0 && cur.pos() >= -moveCursor)
382 // Optimisation: this is used in the next two loops
383 // so better to calculate that once here.
384 int const right_margin = rightMargin(pm);
386 // iterator pointing to paragraph to resolve macros
387 DocIterator parPos = text_->macrocontextPosition();
391 LYXERR(Debug::INFO, "MacroContext not initialised!"
392 << " Going through the buffer again and hope"
393 << " the context is better then.");
394 // FIXME audit updateBuffer calls
395 // This should not be here, but it is not clear yet where else it
397 bv_->buffer().updateBuffer();
398 parPos = text_->macrocontextPosition();
399 LBUFERR(!parPos.empty());
404 par.setBeginOfBody();
405 Font const bufferfont = buffer.params().getFont();
406 CoordCache::Insets & insetCache = bv_->coordCache().insets();
407 InsetList::const_iterator ii = par.insetList().begin();
408 InsetList::const_iterator iend = par.insetList().end();
409 for (; ii != iend; ++ii) {
410 // FIXME Doesn't this HAVE to be non-empty?
411 // position already initialized?
412 if (!parPos.empty()) {
413 parPos.pos() = ii->pos;
415 // A macro template would normally not be visible
416 // by itself. But the tex macro semantics allow
417 // recursion, so we artifically take the context
418 // after the macro template to simulate this.
419 if (ii->inset->lyxCode() == MATHMACRO_CODE)
423 // If there is an end of paragraph marker, its size should be
424 // substracted to the available width. The logic here is
425 // almost the same as in breakRow, remember keep them in sync.
427 if (lyxrc.paragraph_markers && ii->pos + 1 == par.size()
428 && size_type(pit + 1) < text_->paragraphs().size()) {
429 Font f(text_->layoutFont(pit));
430 // ¶ U+00B6 PILCROW SIGN
431 eop = theFontMetrics(f).width(char_type(0x00B6));
434 // do the metric calculation
436 int const w = max_width_ - leftMargin(pit, ii->pos)
437 - right_margin - eop;
438 Font const & font = ii->inset->inheritFont() ?
439 displayFont(pit, ii->pos) : bufferfont;
440 MacroContext mc(&buffer, parPos);
441 MetricsInfo mi(bv_, font.fontInfo(), w, mc);
442 ii->inset->metrics(mi, dim);
443 if (!insetCache.has(ii->inset) || insetCache.dim(ii->inset) != dim) {
444 insetCache.add(ii->inset, dim);
450 size_t row_index = 0;
451 bool need_new_row = false;
452 // maximum pixel width of a row
454 if (row_index == pm.rows().size())
455 pm.rows().push_back(Row());
456 Row & row = pm.rows()[row_index];
460 need_new_row = breakRow(row, right_margin);
462 row.setChanged(false);
463 if (row_index || row.endpos() < par.size()
464 || (row.right_boundary() && par.inInset().lyxCode() != CELL_CODE)) {
465 /* If there is more than one row or the row has been
466 * broken by a display inset or a newline, expand the text
467 * to the full allowable width. This setting here is
468 * needed for the computeRowMetrics() below. In the case
469 * of a display inset, we do nothing when inside a table
470 * cell, because the tabular code is not prepared for
471 * that, and it triggers when using a caption in a
472 * longtable (see bugs #9945 and #9757).
474 if (dim_.wid < max_width_)
475 dim_.wid = max_width_;
477 int const max_row_width = max(dim_.wid, row.width());
478 computeRowMetrics(row, max_row_width);
479 first = row.endpos();
482 pm.dim().wid = max(pm.dim().wid, row.width());
483 pm.dim().des += row.height();
484 } while (first < par.size() || need_new_row);
486 if (row_index < pm.rows().size())
487 pm.rows().resize(row_index);
489 // FIXME: It might be better to move this in another method
490 // specially tailored for the main text.
491 // Top and bottom margin of the document (only at top-level)
492 if (text_->isMainText()) {
493 // original value was 20px, which is 0.2in at 100dpi
494 int const margin = Length(0.2, Length::IN).inPixels(0);
496 pm.rows().front().dimension().asc += margin;
497 /* coverity thinks that we should update pm.dim().asc
498 * below, but all the rows heights are actually counted as
499 * part of the paragraph metric descent see loop above).
501 // coverity[copy_paste_error]
502 pm.dim().des += margin;
504 ParagraphList const & pars = text_->paragraphs();
505 if (pit + 1 == pit_type(pars.size())) {
506 pm.rows().back().dimension().des += margin;
507 pm.dim().des += margin;
511 // The space above and below the paragraph.
512 int const top = parTopSpacing(pit);
513 pm.rows().front().dimension().asc += top;
514 int const bottom = parBottomSpacing(pit);
515 pm.rows().back().dimension().des += bottom;
516 pm.dim().des += top + bottom;
518 pm.dim().asc += pm.rows()[0].ascent();
519 pm.dim().des -= pm.rows()[0].ascent();
521 changed |= old_dim.height() != pm.dim().height();
527 LyXAlignment TextMetrics::getAlign(Paragraph const & par, Row const & row) const
529 LyXAlignment align = par.getAlign();
531 // handle alignment inside tabular cells
532 Inset const & owner = text_->inset();
533 bool forced_block = false;
534 switch (owner.contentAlignment()) {
535 case LYX_ALIGN_BLOCK:
536 // In general block align is the default state, but here it is
537 // an explicit choice. Therefore it should not be overridden
541 case LYX_ALIGN_CENTER:
543 case LYX_ALIGN_RIGHT:
544 if (align == LYX_ALIGN_NONE || align == LYX_ALIGN_BLOCK)
545 align = owner.contentAlignment();
548 // unchanged (use align)
552 // Display-style insets should always be on a centered row
553 if (Inset const * inset = par.getInset(row.pos())) {
554 switch (inset->display()) {
555 case Inset::AlignLeft:
556 align = LYX_ALIGN_BLOCK;
558 case Inset::AlignCenter:
559 align = LYX_ALIGN_CENTER;
562 // unchanged (use align)
564 case Inset::AlignRight:
565 align = LYX_ALIGN_RIGHT;
570 if (align == LYX_ALIGN_BLOCK) {
571 // If this row has been broken abruptly by a display inset, or
572 // it is the end of the paragraph, or the user requested we
573 // not justify stuff, then don't stretch.
574 // A forced block alignment can only be overridden the 'no
575 // justification on screen' setting.
576 if ((row.flushed() && !forced_block)
577 || !bv_->buffer().params().justification)
578 align = row.isRTL() ? LYX_ALIGN_RIGHT : LYX_ALIGN_LEFT;
585 void TextMetrics::computeRowMetrics(Row & row, int width) const
590 Paragraph const & par = text_->getPar(row.pit());
592 int const w = width - row.right_margin - row.width();
593 // FIXME: put back this assertion when the crash on new doc is solved.
594 //LASSERT(w >= 0, /**/);
596 // is there a manual margin with a manual label
597 Layout const & layout = par.layout();
600 if (layout.margintype == MARGIN_MANUAL
601 && layout.labeltype == LABEL_MANUAL) {
602 /// We might have real hfills in the label part
603 nlh = numberOfLabelHfills(par, row);
605 // A manual label par (e.g. List) has an auto-hfill
606 // between the label text and the body of the
608 // But we don't want to do this auto hfill if the par
613 if (nlh && !par.getLabelWidthString().empty())
614 row.label_hfill = labelFill(row) / double(nlh);
617 // are there any hfills in the row?
618 ParagraphMetrics & pm = par_metrics_[row.pit()];
619 int nh = numberOfHfills(row, pm, par.beginOfBody());
623 // We don't have to look at the alignment if the row is already
624 // larger then the permitted width as then we force the
625 // LEFT_ALIGN'edness!
626 if (int(row.width()) >= max_width_)
630 // Common case : there is no hfill, and the alignment will be
632 switch (getAlign(par, row)) {
633 case LYX_ALIGN_BLOCK:
634 // Expand expanding characters by a total of w
635 if (!row.setExtraWidth(w) && row.isRTL()) {
636 // Justification failed and the text is RTL: align to the right
637 row.left_margin += w;
638 row.dimension().wid += w;
642 // a displayed inset that is flushed
643 if (Inset const * inset = par.getInset(row.pos()))
644 row.left_margin += inset->indent(*bv_);
646 case LYX_ALIGN_RIGHT:
647 if (Inset const * inset = par.getInset(row.pos())) {
648 int const new_w = max(w - inset->indent(*bv_), 0);
649 row.left_margin += new_w;
650 row.dimension().wid += new_w;
652 row.left_margin += w;
653 row.dimension().wid += w;
656 case LYX_ALIGN_CENTER:
657 row.dimension().wid += w / 2;
658 row.left_margin += w / 2;
661 case LYX_ALIGN_LAYOUT:
662 case LYX_ALIGN_SPECIAL:
663 case LYX_ALIGN_DECIMAL:
669 // Case nh > 0. There are hfill separators.
672 row.dimension().wid += w;
673 // Set size of hfill insets
674 pos_type const endpos = row.endpos();
675 pos_type body_pos = par.beginOfBody();
677 && (body_pos > endpos || !par.isLineSeparator(body_pos - 1)))
680 CoordCache::Insets & insetCache = bv_->coordCache().insets();
681 Row::iterator cit = row.begin();
682 Row::iterator const cend = row.end();
683 for ( ; cit != cend; ++cit) {
684 if (row.label_hfill && cit->endpos == body_pos
685 && cit->type == Row::SPACE)
686 cit->dim.wid -= int(row.label_hfill * (nlh - 1));
687 if (cit->inset && pm.hfillExpansion(row, cit->pos)) {
688 if (cit->pos >= body_pos) {
689 cit->dim.wid += hfill;
692 cit->dim.wid += hfill_rem;
694 cit->dim.wid += int(row.label_hfill);
695 // Cache the inset dimension.
696 insetCache.add(cit->inset, cit->dim);
702 int TextMetrics::labelFill(Row const & row) const
704 Paragraph const & par = text_->getPar(row.pit());
705 LBUFERR(par.beginOfBody() > 0 || par.isEnvSeparator(0));
708 Row::const_iterator cit = row.begin();
709 Row::const_iterator const end = row.end();
710 // iterate over elements before main body (except the last one,
711 // which is extra space).
712 while (cit!= end && cit->endpos < par.beginOfBody()) {
717 docstring const & label = par.params().labelWidthString();
721 FontMetrics const & fm
722 = theFontMetrics(text_->labelFont(par));
724 return max(0, fm.width(label) - w);
729 // Not used, see TextMetrics::breakRow
730 // this needs special handling - only newlines count as a break point
731 static pos_type addressBreakPoint(pos_type i, Paragraph const & par)
733 pos_type const end = par.size();
736 if (par.isNewline(i))
744 int TextMetrics::labelEnd(pit_type const pit) const
746 // labelEnd is only needed if the layout fills a flushleft label.
747 if (text_->getPar(pit).layout().margintype != MARGIN_MANUAL)
749 // return the beginning of the body
750 return leftMargin(pit);
756 * Calling Text::getFont is slow. While rebreaking we scan a
757 * paragraph from left to right calling getFont for every char. This
758 * simple class address this problem by hidding an optimization trick
759 * (not mine btw -AB): the font is reused in the whole font span. The
760 * class handles transparently the "hidden" (not part of the fontlist)
761 * label font (as getFont does).
767 FontIterator(TextMetrics const & tm,
768 Paragraph const & par, pit_type pit, pos_type pos)
769 : tm_(tm), par_(par), pit_(pit), pos_(pos),
770 font_(tm.displayFont(pit, pos)),
771 endspan_(par.fontSpan(pos).last),
772 bodypos_(par.beginOfBody())
776 Font const & operator*() const { return font_; }
779 FontIterator & operator++()
782 if (pos_ < par_.size() && (pos_ > endspan_ || pos_ == bodypos_)) {
783 font_ = tm_.displayFont(pit_, pos_);
784 endspan_ = par_.fontSpan(pos_).last;
790 Font * operator->() { return &font_; }
794 TextMetrics const & tm_;
796 Paragraph const & par_;
811 /** This is the function where the hard work is done. The code here is
812 * very sensitive to small changes :) Note that part of the
813 * intelligence is also in Row::shortenIfNeeded.
815 bool TextMetrics::breakRow(Row & row, int const right_margin) const
817 Paragraph const & par = text_->getPar(row.pit());
818 pos_type const end = par.size();
819 pos_type const pos = row.pos();
820 pos_type const body_pos = par.beginOfBody();
821 bool const is_rtl = text_->isRTL(par);
822 bool need_new_row = false;
825 row.left_margin = leftMargin(row.pit(), pos);
826 row.right_margin = right_margin;
828 swap(row.left_margin, row.right_margin);
829 // Remember that the row width takes into account the left_margin
830 // but not the right_margin.
831 row.dimension().wid = row.left_margin;
832 // the width available for the row.
833 int const width = max_width_ - row.right_margin;
835 if (pos >= end || row.width() > width) {
841 //FIXME: As long as leftMargin() is not correctly implemented for
842 // MARGIN_RIGHT_ADDRESS_BOX, we should also not do this here.
843 // Otherwise, long rows will be painted off the screen.
844 if (par.layout().margintype == MARGIN_RIGHT_ADDRESS_BOX)
845 return addressBreakPoint(pos, par);
848 // check for possible inline completion
849 DocIterator const & ic_it = bv_->inlineCompletionPos();
850 pos_type ic_pos = -1;
851 if (ic_it.inTexted() && ic_it.text() == text_ && ic_it.pit() == row.pit())
852 ic_pos = ic_it.pos();
854 // Now we iterate through until we reach the right margin
855 // or the end of the par, then build a representation of the row.
857 FontIterator fi = FontIterator(*this, par, row.pit(), pos);
859 // this can happen for an empty row after a newline
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);
943 } while (i < end && row.width() <= width);
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 // if the row is too large, try to cut at last separator. In case
965 // of success, reset indication that the row was broken abruptly.
966 int const next_width = max_width_ - leftMargin(row.pit(), row.endpos())
967 - rightMargin(row.pit());
969 if (row.shortenIfNeeded(body_pos, width, next_width))
971 row.right_boundary(!row.empty() && row.endpos() < end
972 && row.back().endpos == row.endpos());
973 // Last row in paragraph is flushed
974 if (row.endpos() == end)
977 // make sure that the RTL elements are in reverse ordering
978 row.reverseRTL(is_rtl);
979 //LYXERR0("breakrow: row is " << row);
984 int TextMetrics::parTopSpacing(pit_type const pit) const
986 Paragraph const & par = text_->getPar(pit);
987 Layout const & layout = par.layout();
990 ParagraphList const & pars = text_->paragraphs();
991 double const dh = defaultRowHeight();
993 BufferParams const & bparams = bv_->buffer().params();
994 Inset const & inset = text_->inset();
995 // some parskips VERY EASY IMPLEMENTATION
996 if (bparams.paragraph_separation == BufferParams::ParagraphSkipSeparation
997 && !inset.getLayout().parbreakIsNewline()
998 && !par.layout().parbreak_is_newline
1000 && ((layout.isParagraph() && par.getDepth() == 0)
1001 || (pars[pit - 1].layout().isParagraph()
1002 && pars[pit - 1].getDepth() == 0))) {
1003 asc += bparams.getDefSkip().inPixels(*bv_);
1006 if (par.params().startOfAppendix())
1009 // special code for the top label
1010 if (layout.labelIsAbove()
1011 && (!layout.isParagraphGroup() || text_->isFirstInSequence(pit))
1012 && !par.labelString().empty()) {
1013 FontInfo labelfont = text_->labelFont(par);
1014 FontMetrics const & lfm = theFontMetrics(labelfont);
1015 asc += int(lfm.maxHeight() * layout.spacing.getValue()
1016 * text_->spacing(par)
1017 + (layout.topsep + layout.labelbottomsep) * dh);
1020 // Add the layout spaces, for example before and after
1021 // a section, or between the items of a itemize or enumerate
1024 pit_type prev = text_->depthHook(pit, par.getDepth());
1025 Paragraph const & prevpar = pars[prev];
1026 double layoutasc = 0;
1028 && prevpar.layout() == layout
1029 && prevpar.getDepth() == par.getDepth()
1030 && prevpar.getLabelWidthString() == par.getLabelWidthString()) {
1031 layoutasc = layout.itemsep * dh;
1032 } else if (pit != 0 && layout.topsep > 0)
1033 layoutasc = layout.topsep * dh;
1035 asc += int(layoutasc * 2 / (2 + pars[pit].getDepth()));
1037 prev = text_->outerHook(pit);
1038 if (prev != pit_type(pars.size())) {
1039 asc += int(pars[prev].layout().parsep * dh);
1040 } else if (pit != 0) {
1041 Paragraph const & prevpar = pars[pit - 1];
1042 if (prevpar.getDepth() != 0 || prevpar.layout() == layout)
1043 asc += int(layout.parsep * dh);
1050 int TextMetrics::parBottomSpacing(pit_type const pit) const
1052 double layoutdesc = 0;
1053 ParagraphList const & pars = text_->paragraphs();
1054 double const dh = defaultRowHeight();
1056 // add the layout spaces, for example before and after
1057 // a section, or between the items of a itemize or enumerate
1059 pit_type nextpit = pit + 1;
1060 if (nextpit != pit_type(pars.size())) {
1061 pit_type cpit = pit;
1063 if (pars[cpit].getDepth() > pars[nextpit].getDepth()) {
1064 double usual = pars[cpit].layout().bottomsep * dh;
1066 cpit = text_->depthHook(cpit, pars[nextpit].getDepth());
1067 if (pars[cpit].layout() != pars[nextpit].layout()
1068 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
1069 unusual = pars[cpit].layout().bottomsep * dh;
1070 layoutdesc = max(unusual, usual);
1071 } else if (pars[cpit].getDepth() == pars[nextpit].getDepth()) {
1072 if (pars[cpit].layout() != pars[nextpit].layout()
1073 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
1074 layoutdesc = int(pars[cpit].layout().bottomsep * dh);
1078 return int(layoutdesc * 2 / (2 + pars[pit].getDepth()));
1082 void TextMetrics::setRowHeight(Row & row) const
1084 Paragraph const & par = text_->getPar(row.pit());
1085 Layout const & layout = par.layout();
1086 double const spacing_val = layout.spacing.getValue() * text_->spacing(par);
1088 // Initial value for ascent (useful if row is empty).
1089 Font const font = displayFont(row.pit(), row.pos());
1090 FontMetrics const & fm = theFontMetrics(font);
1091 int maxasc = int(fm.maxAscent() * spacing_val);
1092 int maxdes = int(fm.maxDescent() * spacing_val);
1094 // Find the ascent/descent of the row contents
1095 Row::const_iterator cit = row.begin();
1096 Row::const_iterator cend = row.end();
1097 for ( ; cit != cend; ++cit) {
1099 maxasc = max(maxasc, cit->dim.ascent());
1100 maxdes = max(maxdes, cit->dim.descent());
1102 FontMetrics const & fm = theFontMetrics(cit->font);
1103 maxasc = max(maxasc, int(fm.maxAscent() * spacing_val));
1104 maxdes = max(maxdes, int(fm.maxDescent() * spacing_val));
1108 // This is nicer with box insets
1112 row.dimension().asc = maxasc;
1113 row.dimension().des = maxdes;
1117 // x is an absolute screen coord
1118 // returns the column near the specified x-coordinate of the row
1119 // x is set to the real beginning of this column
1120 pos_type TextMetrics::getPosNearX(Row const & row, int & x,
1121 bool & boundary) const
1123 //LYXERR0("getPosNearX(" << x << ") row=" << row);
1124 /// For the main Text, it is possible that this pit is not
1125 /// yet in the CoordCache when moving cursor up.
1126 /// x Paragraph coordinate is always 0 for main text anyway.
1127 int const xo = origin_.x_;
1130 // Adapt to cursor row scroll offset if applicable.
1131 int const offset = bv_->horizScrollOffset(text_, row.pit(), row.pos());
1134 pos_type pos = row.pos();
1137 x = row.left_margin;
1138 else if (x <= row.left_margin) {
1139 pos = row.front().left_pos();
1140 x = row.left_margin;
1141 } else if (x >= row.width()) {
1142 pos = row.back().right_pos();
1145 double w = row.left_margin;
1146 Row::const_iterator cit = row.begin();
1147 Row::const_iterator cend = row.end();
1148 for ( ; cit != cend; ++cit) {
1149 if (w <= x && w + cit->full_width() > x) {
1150 int x_offset = int(x - w);
1151 pos = cit->x2pos(x_offset);
1152 x = int(x_offset + w);
1155 w += cit->full_width();
1157 if (cit == row.end()) {
1158 pos = row.back().right_pos();
1161 /** This tests for the case where the cursor is placed
1162 * just before a font direction change. See comment on
1163 * the boundary_ member in DocIterator.h to understand
1164 * how boundary helps here.
1166 else if (pos == cit->endpos
1167 && ((!cit->isRTL() && cit + 1 != row.end()
1168 && (cit + 1)->isRTL())
1169 || (cit->isRTL() && cit != row.begin()
1170 && !(cit - 1)->isRTL())))
1174 /** This tests for the case where the cursor is set at the end
1175 * of a row which has been broken due something else than a
1176 * separator (a display inset or a forced breaking of the
1177 * row). We know that there is a separator when the end of the
1178 * row is larger than the end of its last element.
1180 if (!row.empty() && pos == row.back().endpos
1181 && row.back().endpos == row.endpos()) {
1182 Inset const * inset = row.back().inset;
1183 if (inset && (inset->lyxCode() == NEWLINE_CODE
1184 || inset->lyxCode() == SEPARATOR_CODE))
1185 pos = row.back().pos;
1187 boundary = row.right_boundary();
1191 //LYXERR0("getPosNearX ==> pos=" << pos << ", boundary=" << boundary);
1197 pos_type TextMetrics::x2pos(pit_type pit, int row, int x) const
1199 // We play safe and use parMetrics(pit) to make sure the
1200 // ParagraphMetrics will be redone and OK to use if needed.
1201 // Otherwise we would use an empty ParagraphMetrics in
1202 // upDownInText() while in selection mode.
1203 ParagraphMetrics const & pm = parMetrics(pit);
1205 LBUFERR(row < int(pm.rows().size()));
1207 Row const & r = pm.rows()[row];
1208 return getPosNearX(r, x, bound);
1212 void TextMetrics::newParMetricsDown()
1214 pair<pit_type, ParagraphMetrics> const & last = *par_metrics_.rbegin();
1215 pit_type const pit = last.first + 1;
1216 if (pit == int(text_->paragraphs().size()))
1219 // do it and update its position.
1221 par_metrics_[pit].setPosition(last.second.position()
1222 + last.second.descent() + par_metrics_[pit].ascent());
1226 void TextMetrics::newParMetricsUp()
1228 pair<pit_type, ParagraphMetrics> const & first = *par_metrics_.begin();
1229 if (first.first == 0)
1232 pit_type const pit = first.first - 1;
1233 // do it and update its position.
1235 par_metrics_[pit].setPosition(first.second.position()
1236 - first.second.ascent() - par_metrics_[pit].descent());
1239 // y is screen coordinate
1240 pit_type TextMetrics::getPitNearY(int y)
1242 LASSERT(!text_->paragraphs().empty(), return -1);
1243 LASSERT(!par_metrics_.empty(), return -1);
1244 LYXERR(Debug::DEBUG, "y: " << y << " cache size: " << par_metrics_.size());
1246 // look for highest numbered paragraph with y coordinate less than given y
1249 ParMetricsCache::const_iterator it = par_metrics_.begin();
1250 ParMetricsCache::const_iterator et = par_metrics_.end();
1251 ParMetricsCache::const_iterator last = et;
1254 ParagraphMetrics const & pm = it->second;
1256 if (y < it->second.position() - int(pm.ascent())) {
1257 // We are looking for a position that is before the first paragraph in
1258 // the cache (which is in priciple off-screen, that is before the
1261 // We are already at the first paragraph in the inset.
1263 // OK, this is the paragraph we are looking for.
1264 pit = it->first - 1;
1269 ParagraphMetrics const & pm_last = par_metrics_[last->first];
1271 if (y >= last->second.position() + int(pm_last.descent())) {
1272 // We are looking for a position that is after the last paragraph in
1273 // the cache (which is in priciple off-screen), that is before the
1275 pit = last->first + 1;
1276 if (pit == int(text_->paragraphs().size()))
1277 // We are already at the last paragraph in the inset.
1279 // OK, this is the paragraph we are looking for.
1280 newParMetricsDown();
1284 for (; it != et; ++it) {
1285 LYXERR(Debug::DEBUG, "examining: pit: " << it->first
1286 << " y: " << it->second.position());
1288 ParagraphMetrics const & pm = par_metrics_[it->first];
1290 if (it->first >= pit && int(it->second.position()) - int(pm.ascent()) <= y) {
1292 yy = it->second.position();
1296 LYXERR(Debug::DEBUG, "found best y: " << yy << " for pit: " << pit);
1302 Row const & TextMetrics::getPitAndRowNearY(int & y, pit_type & pit,
1303 bool assert_in_view, bool up)
1305 ParagraphMetrics const & pm = par_metrics_[pit];
1307 int yy = pm.position() - pm.ascent();
1308 LBUFERR(!pm.rows().empty());
1309 RowList::const_iterator rit = pm.rows().begin();
1310 RowList::const_iterator rlast = pm.rows().end();
1312 for (; rit != rlast; yy += rit->height(), ++rit)
1313 if (yy + rit->height() > y)
1316 if (assert_in_view) {
1317 if (!up && yy + rit->height() > y) {
1318 if (rit != pm.rows().begin()) {
1321 } else if (pit != 0) {
1324 ParagraphMetrics const & pm2 = par_metrics_[pit];
1325 rit = pm2.rows().end();
1329 } else if (up && yy != y) {
1331 y = yy + rit->height();
1333 } else if (pit < int(text_->paragraphs().size()) - 1) {
1335 newParMetricsDown();
1336 ParagraphMetrics const & pm2 = par_metrics_[pit];
1337 rit = pm2.rows().begin();
1346 // x,y are absolute screen coordinates
1347 // sets cursor recursively descending into nested editable insets
1348 Inset * TextMetrics::editXY(Cursor & cur, int x, int y,
1349 bool assert_in_view, bool up)
1351 if (lyxerr.debugging(Debug::WORKAREA)) {
1352 LYXERR0("TextMetrics::editXY(cur, " << x << ", " << y << ")");
1353 cur.bv().coordCache().dump();
1355 pit_type pit = getPitNearY(y);
1356 LASSERT(pit != -1, return 0);
1357 Row const & row = getPitAndRowNearY(y, pit, assert_in_view, up);
1360 // Do we cover an inset?
1361 InsetList::InsetTable * it = checkInsetHit(pit, x, y);
1364 // No inset, set position in the text
1365 bool bound = false; // is modified by getPosNearX
1366 cur.pos() = getPosNearX(row, x, bound);
1367 cur.boundary(bound);
1368 cur.setCurrentFont();
1373 Inset * inset = it->inset;
1374 //lyxerr << "inset " << inset << " hit at x: " << x << " y: " << y << endl;
1376 // Set position in front of inset
1377 cur.pos() = it->pos;
1378 cur.boundary(false);
1381 // Try to descend recursively inside the inset.
1382 Inset * edited = inset->editXY(cur, x, y);
1383 // FIXME: it is not clear that the test on position is needed
1384 // Remove it if/when semantics of editXY is clarified
1385 if (cur.text() == text_ && cur.pos() == it->pos) {
1386 // non-editable inset, set cursor after the inset if x is
1387 // nearer to that position (bug 9628)
1388 bool bound = false; // is modified by getPosNearX
1389 cur.pos() = getPosNearX(row, x, bound);
1390 cur.boundary(bound);
1391 cur.setCurrentFont();
1395 if (cur.top().text() == text_)
1396 cur.setCurrentFont();
1401 void TextMetrics::setCursorFromCoordinates(Cursor & cur, int const x, int const y)
1403 LASSERT(text_ == cur.text(), return);
1404 pit_type const pit = getPitNearY(y);
1405 LASSERT(pit != -1, return);
1407 ParagraphMetrics const & pm = par_metrics_[pit];
1409 int yy = pm.position() - pm.ascent();
1410 LYXERR(Debug::DEBUG, "x: " << x << " y: " << y <<
1411 " pit: " << pit << " yy: " << yy);
1414 LBUFERR(pm.rows().size());
1415 for (; r < int(pm.rows().size()) - 1; ++r) {
1416 Row const & row = pm.rows()[r];
1417 if (int(yy + row.height()) > y)
1422 Row const & row = pm.rows()[r];
1424 LYXERR(Debug::DEBUG, "row " << r << " from pos: " << row.pos());
1428 pos_type const pos = getPosNearX(row, xx, bound);
1430 LYXERR(Debug::DEBUG, "setting cursor pit: " << pit << " pos: " << pos);
1432 text_->setCursor(cur, pit, pos, true, bound);
1433 // remember new position.
1438 //takes screen x,y coordinates
1439 InsetList::InsetTable * TextMetrics::checkInsetHit(pit_type pit, int x, int y)
1441 Paragraph const & par = text_->paragraphs()[pit];
1442 CoordCache::Insets const & insetCache = bv_->coordCache().getInsets();
1444 LYXERR(Debug::DEBUG, "x: " << x << " y: " << y << " pit: " << pit);
1446 for (auto const & it : par.insetList()) {
1447 LYXERR(Debug::DEBUG, "examining inset " << it.inset);
1449 if (insetCache.covers(it.inset, x, y)) {
1450 LYXERR(Debug::DEBUG, "Hit inset: " << it.inset);
1451 return const_cast<InsetList::InsetTable *>(&it);
1455 LYXERR(Debug::DEBUG, "No inset hit. ");
1460 //takes screen x,y coordinates
1461 Inset * TextMetrics::checkInsetHit(int x, int y)
1463 pit_type const pit = getPitNearY(y);
1464 LASSERT(pit != -1, return 0);
1465 InsetList::InsetTable * it = checkInsetHit(pit, x, y);
1474 int TextMetrics::cursorX(CursorSlice const & sl,
1475 bool boundary) const
1477 LASSERT(sl.text() == text_, return 0);
1479 ParagraphMetrics const & pm = par_metrics_[sl.pit()];
1480 if (pm.rows().empty())
1482 Row const & row = pm.getRow(sl.pos(), boundary);
1483 pos_type const pos = sl.pos();
1486 row.findElement(pos, boundary, x);
1492 int TextMetrics::cursorY(CursorSlice const & sl, bool boundary) const
1494 //lyxerr << "TextMetrics::cursorY: boundary: " << boundary << endl;
1495 ParagraphMetrics const & pm = par_metrics_[sl.pit()];
1496 if (pm.rows().empty())
1500 h -= par_metrics_[0].rows()[0].ascent();
1501 for (pit_type pit = 0; pit < sl.pit(); ++pit) {
1502 h += par_metrics_[pit].height();
1505 if (pos && boundary)
1507 size_t const rend = pm.pos2row(pos);
1508 for (size_t rit = 0; rit != rend; ++rit)
1509 h += pm.rows()[rit].height();
1510 h += pm.rows()[rend].ascent();
1515 // the cursor set functions have a special mechanism. When they
1516 // realize you left an empty paragraph, they will delete it.
1518 bool TextMetrics::cursorHome(Cursor & cur)
1520 LASSERT(text_ == cur.text(), return false);
1521 ParagraphMetrics const & pm = par_metrics_[cur.pit()];
1522 Row const & row = pm.getRow(cur.pos(),cur.boundary());
1523 return text_->setCursor(cur, cur.pit(), row.pos());
1527 bool TextMetrics::cursorEnd(Cursor & cur)
1529 LASSERT(text_ == cur.text(), return false);
1530 // if not on the last row of the par, put the cursor before
1531 // the final space exept if I have a spanning inset or one string
1532 // is so long that we force a break.
1533 pos_type end = cur.textRow().endpos();
1535 // empty text, end-1 is no valid position
1537 bool boundary = false;
1538 if (end != cur.lastpos()) {
1539 if (!cur.paragraph().isLineSeparator(end-1)
1540 && !cur.paragraph().isNewline(end-1)
1541 && !cur.paragraph().isEnvSeparator(end-1))
1545 } else if (cur.paragraph().isEnvSeparator(end-1))
1547 return text_->setCursor(cur, cur.pit(), end, true, boundary);
1551 void TextMetrics::deleteLineForward(Cursor & cur)
1553 LASSERT(text_ == cur.text(), return);
1554 if (cur.lastpos() == 0) {
1555 // Paragraph is empty, so we just go forward
1556 text_->cursorForward(cur);
1559 cur.selection(true); // to avoid deletion
1562 // What is this test for ??? (JMarc)
1563 if (!cur.selection())
1564 text_->deleteWordForward(cur);
1566 cap::cutSelection(cur, true, false);
1567 cur.checkBufferStructure();
1572 bool TextMetrics::isLastRow(Row const & row) const
1574 ParagraphList const & pars = text_->paragraphs();
1575 return row.endpos() >= pars[row.pit()].size()
1576 && row.pit() + 1 == pit_type(pars.size());
1580 bool TextMetrics::isFirstRow(Row const & row) const
1582 return row.pos() == 0 && row.pit() == 0;
1586 int TextMetrics::leftMargin(pit_type pit) const
1588 return leftMargin(pit, text_->paragraphs()[pit].size());
1592 int TextMetrics::leftMargin(pit_type const pit, pos_type const pos) const
1594 ParagraphList const & pars = text_->paragraphs();
1596 LASSERT(pit >= 0, return 0);
1597 LASSERT(pit < int(pars.size()), return 0);
1598 Paragraph const & par = pars[pit];
1599 LASSERT(pos >= 0, return 0);
1600 LASSERT(pos <= par.size(), return 0);
1601 Buffer const & buffer = bv_->buffer();
1602 //lyxerr << "TextMetrics::leftMargin: pit: " << pit << " pos: " << pos << endl;
1603 DocumentClass const & tclass = buffer.params().documentClass();
1604 Layout const & layout = par.layout();
1605 FontMetrics const & bfm = theFontMetrics(buffer.params().getFont());
1607 docstring parindent = layout.parindent;
1611 if (text_->isMainText())
1612 l_margin += bv_->leftMargin();
1614 l_margin += bfm.signedWidth(tclass.leftmargin());
1616 int depth = par.getDepth();
1618 // find the next level paragraph
1619 pit_type newpar = text_->outerHook(pit);
1620 if (newpar != pit_type(pars.size())) {
1621 if (pars[newpar].layout().isEnvironment()) {
1622 int nestmargin = depth * nestMargin();
1623 if (text_->isMainText())
1624 nestmargin += changebarMargin();
1625 l_margin = max(leftMargin(newpar), nestmargin);
1626 // Remove the parindent that has been added
1627 // if the paragraph was empty.
1628 if (pars[newpar].empty() &&
1629 buffer.params().paragraph_separation ==
1630 BufferParams::ParagraphIndentSeparation) {
1631 docstring pi = pars[newpar].layout().parindent;
1632 l_margin -= bfm.signedWidth(pi);
1635 if (tclass.isDefaultLayout(par.layout())
1636 || tclass.isPlainLayout(par.layout())) {
1637 if (pars[newpar].params().noindent())
1640 parindent = pars[newpar].layout().parindent;
1645 // This happens after sections or environments in standard classes.
1646 // We have to check the previous layout at same depth.
1647 if (buffer.params().paragraph_separation ==
1648 BufferParams::ParagraphSkipSeparation)
1650 else if (pit > 0 && pars[pit - 1].getDepth() >= par.getDepth()) {
1651 pit_type prev = text_->depthHook(pit, par.getDepth());
1652 if (par.layout() == pars[prev].layout()) {
1654 && pars[pit - 1].layout().nextnoindent)
1656 } else if (pars[prev].layout().nextnoindent)
1660 FontInfo const labelfont = text_->labelFont(par);
1661 FontMetrics const & lfm = theFontMetrics(labelfont);
1663 switch (layout.margintype) {
1664 case MARGIN_DYNAMIC:
1665 if (!layout.leftmargin.empty()) {
1666 l_margin += bfm.signedWidth(layout.leftmargin);
1668 if (!par.labelString().empty()) {
1669 l_margin += lfm.signedWidth(layout.labelindent);
1670 l_margin += lfm.width(par.labelString());
1671 l_margin += lfm.width(layout.labelsep);
1675 case MARGIN_MANUAL: {
1676 l_margin += lfm.signedWidth(layout.labelindent);
1677 // The width of an empty par, even with manual label, should be 0
1678 if (!par.empty() && pos >= par.beginOfBody()) {
1679 if (!par.getLabelWidthString().empty()) {
1680 docstring labstr = par.getLabelWidthString();
1681 l_margin += lfm.width(labstr);
1682 l_margin += lfm.width(layout.labelsep);
1688 case MARGIN_STATIC: {
1689 l_margin += bfm.signedWidth(layout.leftmargin) * 4
1690 / (par.getDepth() + 4);
1694 case MARGIN_FIRST_DYNAMIC:
1695 if (layout.labeltype == LABEL_MANUAL) {
1696 // if we are at position 0, we are never in the body
1697 if (pos > 0 && pos >= par.beginOfBody())
1698 l_margin += lfm.signedWidth(layout.leftmargin);
1700 l_margin += lfm.signedWidth(layout.labelindent);
1702 // Special case to fix problems with
1704 || (layout.labeltype == LABEL_STATIC
1705 && layout.latextype == LATEX_ENVIRONMENT
1706 && !text_->isFirstInSequence(pit))) {
1707 l_margin += lfm.signedWidth(layout.leftmargin);
1708 } else if (!layout.labelIsAbove()) {
1709 l_margin += lfm.signedWidth(layout.labelindent);
1710 l_margin += lfm.width(layout.labelsep);
1711 l_margin += lfm.width(par.labelString());
1715 case MARGIN_RIGHT_ADDRESS_BOX: {
1717 // The left margin depends on the widest row in this paragraph.
1718 // This code is wrong because it depends on the rows, but at the
1719 // same time this function is used in redoParagraph to construct
1721 ParagraphMetrics const & pm = par_metrics_[pit];
1722 RowList::const_iterator rit = pm.rows().begin();
1723 RowList::const_iterator end = pm.rows().end();
1724 int minfill = max_width_;
1725 for ( ; rit != end; ++rit)
1726 if (rit->fill() < minfill)
1727 minfill = rit->fill();
1728 l_margin += bfm.signedWidth(layout.leftmargin);
1729 l_margin += minfill;
1731 // also wrong, but much shorter.
1732 l_margin += max_width_ / 2;
1737 if (!par.params().leftIndent().zero())
1738 l_margin += par.params().leftIndent().inPixels(max_width_, lfm.em());
1740 LyXAlignment align = par.getAlign();
1742 // set the correct parindent
1744 && (layout.labeltype == LABEL_NO_LABEL
1745 || layout.labeltype == LABEL_ABOVE
1746 || layout.labeltype == LABEL_CENTERED
1747 || (layout.labeltype == LABEL_STATIC
1748 && layout.latextype == LATEX_ENVIRONMENT
1749 && !text_->isFirstInSequence(pit)))
1750 && (align == LYX_ALIGN_BLOCK || align == LYX_ALIGN_LEFT)
1751 && !par.params().noindent()
1752 // in some insets, paragraphs are never indented
1753 && !text_->inset().neverIndent()
1754 // display style insets are always centered, omit indentation
1757 && par.getInset(pos)->display())
1758 && (!(tclass.isDefaultLayout(par.layout())
1759 || tclass.isPlainLayout(par.layout()))
1760 || buffer.params().paragraph_separation
1761 == BufferParams::ParagraphIndentSeparation)) {
1762 /* use the parindent of the layout when the default
1763 * indentation is used otherwise use the indentation set in
1764 * the document settings
1766 if (buffer.params().getParIndent().empty())
1767 l_margin += bfm.signedWidth(parindent);
1769 l_margin += buffer.params().getParIndent().inPixels(max_width_, bfm.em());
1776 void TextMetrics::draw(PainterInfo & pi, int x, int y) const
1778 if (par_metrics_.empty())
1784 ParMetricsCache::iterator it = par_metrics_.begin();
1785 ParMetricsCache::iterator const pm_end = par_metrics_.end();
1786 y -= it->second.ascent();
1787 for (; it != pm_end; ++it) {
1788 ParagraphMetrics const & pmi = it->second;
1790 pit_type const pit = it->first;
1791 // Save the paragraph position in the cache.
1792 it->second.setPosition(y);
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 when drawing is disabled.
1807 if (!pi.pain.isDrawingEnabled()) {
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 RowPainter rp(pi, *text_, row, row_x, y);
1861 // It is not needed to draw on screen if we are not inside.
1862 bool const inside = (y + row.descent() >= 0
1863 && y - row.ascent() < ww);
1864 pi.pain.setDrawingEnabled(inside);
1866 // Paint only the insets to set inset cache correctly
1867 // FIXME: remove paintOnlyInsets when we know that positions
1868 // have already been set.
1869 rp.paintOnlyInsets();
1875 row.setSelectionAndMargins(sel_beg_par, sel_end_par);
1877 row.setSelection(-1, -1);
1879 // The row knows nothing about the paragraph, so we have to check
1880 // whether this row is the first or last and update the margins.
1881 if (row.selection()) {
1882 if (row.sel_beg == 0)
1883 row.begin_margin_sel = sel_beg.pit() < pit;
1884 if (row.sel_end == sel_end_par.lastpos())
1885 row.end_margin_sel = sel_end.pit() > pit;
1888 // Row signature; has row changed since last paint?
1889 row.setCrc(pm.computeRowSignature(row, *bv_));
1890 bool row_has_changed = row.changed()
1891 || bv_->hadHorizScrollOffset(text_, pit, row.pos());
1893 // Take this opportunity to spellcheck the row contents.
1894 if (row_has_changed && pi.do_spellcheck && lyxrc.spellcheck_continuously) {
1895 text_->getPar(pit).spellCheck();
1898 // Don't paint the row if a full repaint has not been requested
1899 // and if it has not changed.
1900 if (!pi.full_repaint && !row_has_changed) {
1901 // Paint only the insets if the text itself is
1903 rp.paintOnlyInsets();
1908 // Clear background of this row if paragraph background was not
1909 // already cleared because of a full repaint.
1910 if (!pi.full_repaint && row_has_changed) {
1911 LYXERR(Debug::PAINTING, "Clear rect@("
1912 << max(row_x, 0) << ", " << y - row.ascent() << ")="
1913 << width() << " x " << row.height());
1914 pi.pain.fillRectangle(max(row_x, 0), y - row.ascent(),
1915 width(), row.height(), pi.background_color);
1918 // Instrumentation for testing row cache (see also
1920 if (lyxerr.debugging(Debug::PAINTING)
1921 && (row.selection() || pi.full_repaint || row_has_changed)) {
1922 string const foreword = text_->isMainText() ?
1923 "main text redraw " : "inset text redraw: ";
1924 LYXERR(Debug::PAINTING, foreword << "pit=" << pit << " row=" << i
1925 << " row_selection=" << row.selection()
1926 << " full_repaint=" << pi.full_repaint
1927 << " row_has_changed=" << row_has_changed
1928 << " drawingEnabled=" << pi.pain.isDrawingEnabled());
1931 // Backup full_repaint status and force full repaint
1932 // for inner insets as the Row has been cleared out.
1933 bool tmp = pi.full_repaint;
1934 pi.full_repaint = true;
1936 rp.paintSelection();
1939 rp.paintChangeBar();
1940 if (i == 0 && !row.isRTL())
1942 if (i == nrows - 1 && row.isRTL())
1945 if (i == nrows - 1 && !row.isRTL())
1947 if (i == 0 && row.isRTL())
1949 rp.paintTooLargeMarks(row_x + row.left_x() < 0,
1950 row_x + row.right_x() > bv_->workWidth());
1953 // Restore full_repaint status.
1954 pi.full_repaint = tmp;
1956 // Re-enable screen drawing for future use of the painter.
1957 pi.pain.setDrawingEnabled(true);
1959 //LYXERR(Debug::PAINTING, ".");
1963 void TextMetrics::completionPosAndDim(Cursor const & cur, int & x, int & y,
1964 Dimension & dim) const
1966 Cursor const & bvcur = cur.bv().cursor();
1968 // get word in front of cursor
1969 docstring word = text_->previousWord(bvcur.top());
1970 DocIterator wordStart = bvcur;
1971 wordStart.pos() -= word.length();
1973 // calculate dimensions of the word
1975 row.pit(bvcur.pit());
1976 row.pos(wordStart.pos());
1977 row.endpos(bvcur.pos());
1979 dim = row.dimension();
1981 // get position on screen of the word start and end
1982 //FIXME: Is it necessary to explicitly set this to false?
1983 wordStart.boundary(false);
1984 Point lxy = cur.bv().getPos(wordStart);
1985 Point rxy = cur.bv().getPos(bvcur);
1986 dim.wid = abs(rxy.x_ - lxy.x_);
1988 // calculate position of word
1990 x = min(rxy.x_, lxy.x_);
1992 //lyxerr << "wid=" << dim.width() << " x=" << x << " y=" << y << " lxy.x_=" << lxy.x_ << " rxy.x_=" << rxy.x_ << " word=" << word << std::endl;
1993 //lyxerr << " wordstart=" << wordStart << " bvcur=" << bvcur << " cur=" << cur << std::endl;
1996 int defaultRowHeight()
1998 return int(theFontMetrics(sane_font).maxHeight() * 1.2);