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 "BufferParams.h"
24 #include "BufferView.h"
26 #include "CoordCache.h"
28 #include "FontIterator.h"
29 #include "FuncRequest.h"
32 #include "MetricsInfo.h"
33 #include "paragraph_funcs.h"
34 #include "ParagraphParameters.h"
35 #include "ParIterator.h"
36 #include "rowpainter.h"
40 #include "frontends/FontMetrics.h"
41 #include "frontends/Painter.h"
49 using frontend::FontMetrics;
53 int numberOfSeparators(Paragraph const & par, Row const & row)
55 pos_type const first = max(row.pos(), par.beginOfBody());
56 pos_type const last = row.endpos() - 1;
58 for (pos_type p = first; p < last; ++p) {
59 if (par.isSeparator(p))
66 int numberOfLabelHfills(Paragraph const & par, Row const & row)
68 pos_type last = row.endpos() - 1;
69 pos_type first = row.pos();
71 // hfill *DO* count at the beginning of paragraphs!
73 while (first < last && par.isHfill(first))
77 last = min(last, par.beginOfBody());
79 for (pos_type p = first; p < last; ++p) {
87 int numberOfHfills(Paragraph const & par, Row const & row)
89 pos_type const last = row.endpos();
90 pos_type first = row.pos();
92 // hfill *DO* count at the beginning of paragraphs!
94 while (first < last && par.isHfill(first))
98 first = max(first, par.beginOfBody());
101 for (pos_type p = first; p < last; ++p) {
110 TextMetrics::TextMetrics(BufferView * bv, Text * text)
111 : bv_(bv), text_(text)
114 max_width_ = bv_->workWidth();
115 dim_.wid = max_width_;
119 //text_->updateLabels(bv->buffer());
123 ParagraphMetrics const & TextMetrics::parMetrics(pit_type pit) const
125 return const_cast<TextMetrics *>(this)->parMetrics(pit, true);
129 ParagraphMetrics & TextMetrics::parMetrics(pit_type pit,
132 ParMetricsCache::iterator pmc_it = par_metrics_.find(pit);
133 if (pmc_it == par_metrics_.end()) {
134 pmc_it = par_metrics_.insert(
135 std::make_pair(pit, ParagraphMetrics(text_->getPar(pit)))).first;
137 if (pmc_it->second.rows().empty() && redo) {
140 return pmc_it->second;
144 bool TextMetrics::metrics(MetricsInfo & mi, Dimension & dim)
146 BOOST_ASSERT(mi.base.textwidth);
147 max_width_ = mi.base.textwidth;
149 //lyxerr << "Text::metrics: width: " << mi.base.textwidth
150 // << " maxWidth: " << max_width_ << "\nfont: " << mi.base.font << endl;
152 bool changed = false;
156 for (pit_type pit = 0, n = text_->paragraphs().size(); pit != n; ++pit) {
157 changed |= redoParagraph(pit);
158 ParagraphMetrics const & pm = par_metrics_[pit];
165 dim.asc = par_metrics_[0].ascent();
166 dim.des = h - dim.asc;
168 changed |= dim_ != dim;
174 int TextMetrics::rightMargin(ParagraphMetrics const & pm) const
176 return main_text_? pm.rightMargin(bv_->buffer()) : 0;
180 int TextMetrics::rightMargin(pit_type const pit) const
182 return main_text_? par_metrics_[pit].rightMargin(bv_->buffer()) : 0;
186 bool TextMetrics::redoParagraph(pit_type const pit)
188 Paragraph & par = text_->getPar(pit);
189 // IMPORTANT NOTE: We pass 'false' explicitely in order to not call
190 // redoParagraph() recursively inside parMetrics.
191 Dimension old_dim = parMetrics(pit, false).dim();
192 ParagraphMetrics & pm = par_metrics_[pit];
195 Buffer & buffer = bv_->buffer();
196 BufferParams const & bparams = buffer.params();
197 main_text_ = (text_ == &buffer.text());
198 bool changed = false;
200 // FIXME This check ought to be done somewhere else. It is the reason
201 // why text_ is not const. But then, where else to do it?
202 // Well, how can you end up with either (a) a biblio environment that
203 // has no InsetBibitem or (b) a biblio environment with more than one
204 // InsetBibitem? I think the answer is: when paragraphs are merged;
205 // when layout is set; when material is pasted.
206 int const moveCursor = par.checkBiblio(buffer.params().trackChanges);
208 const_cast<Cursor &>(bv_->cursor()).posRight();
209 else if (moveCursor < 0) {
210 Cursor & cursor = const_cast<Cursor &>(bv_->cursor());
211 if (cursor.pos() >= -moveCursor)
215 // Optimisation: this is used in the next two loops
216 // so better to calculate that once here.
217 int const right_margin = rightMargin(pm);
220 // FIXME: We should always use getFont(), see documentation of
221 // noFontChange() in Inset.h.
222 Font const bufferfont = buffer.params().getFont();
223 InsetList::const_iterator ii = par.insetlist.begin();
224 InsetList::const_iterator iend = par.insetlist.end();
225 for (; ii != iend; ++ii) {
226 Dimension old_dim = ii->inset->dimension();
228 int const w = max_width_ - text_->leftMargin(buffer, max_width_, pit, ii->pos)
230 Font const & font = ii->inset->noFontChange() ?
231 bufferfont : text_->getFont(buffer, par, ii->pos);
232 MetricsInfo mi(bv_, font, w);
233 changed |= ii->inset->metrics(mi, dim);
234 changed |= (old_dim != dim);
237 par.setBeginOfBody();
239 size_t row_index = 0;
240 // maximum pixel width of a row
241 int width = max_width_ - right_margin; // - leftMargin(buffer, max_width_, pit, row);
244 pos_type end = rowBreakPoint(width, pit, first);
245 dim.wid = rowWidth(right_margin, pit, first, end);
246 boost::tie(dim.asc, dim.des) = rowHeight(pit, first, end);
247 if (row_index == pm.rows().size())
248 pm.rows().push_back(Row());
249 Row & row = pm.rows()[row_index];
252 row.setDimension(dim);
253 computeRowMetrics(pit, row);
254 pm.computeRowSignature(row, bparams);
258 pm.dim().wid = std::max(pm.dim().wid, dim.wid);
259 pm.dim().des += dim.height();
260 } while (first < par.size());
262 if (row_index < pm.rows().size())
263 pm.rows().resize(row_index);
265 // Make sure that if a par ends in newline, there is one more row
267 if (first > 0 && par.isNewline(first - 1)) {
269 dim.wid = rowWidth(right_margin, pit, first, first);
270 boost::tie(dim.asc, dim.des) = rowHeight(pit, first, first);
271 if (row_index == pm.rows().size())
272 pm.rows().push_back(Row());
273 Row & row = pm.rows()[row_index];
276 row.setDimension(dim);
277 computeRowMetrics(pit, row);
278 pm.computeRowSignature(row, bparams);
279 pm.dim().des += dim.height();
282 pm.dim().asc += pm.rows()[0].ascent();
283 pm.dim().des -= pm.rows()[0].ascent();
285 changed |= old_dim.height() != pm.dim().height();
290 void TextMetrics::computeRowMetrics(pit_type const pit,
293 Buffer & buffer = bv_->buffer();
294 Paragraph const & par = text_->getPar(pit);
296 double w = dim_.wid - row.width();
298 bool const is_rtl = text_->isRTL(buffer, par);
300 row.x = rightMargin(pit);
302 row.x = text_->leftMargin(buffer, max_width_, pit, row.pos());
304 // is there a manual margin with a manual label
305 LayoutPtr const & layout = par.layout();
307 if (layout->margintype == MARGIN_MANUAL
308 && layout->labeltype == LABEL_MANUAL) {
309 /// We might have real hfills in the label part
310 int nlh = numberOfLabelHfills(par, row);
312 // A manual label par (e.g. List) has an auto-hfill
313 // between the label text and the body of the
315 // But we don't want to do this auto hfill if the par
320 if (nlh && !par.getLabelWidthString().empty())
321 row.label_hfill = labelFill(pit, row) / double(nlh);
324 // are there any hfills in the row?
325 int const nh = numberOfHfills(par, row);
330 // we don't have to look at the alignment if it is ALIGN_LEFT and
331 // if the row is already larger then the permitted width as then
332 // we force the LEFT_ALIGN'edness!
333 } else if (int(row.width()) < max_width_) {
334 // is it block, flushleft or flushright?
335 // set x how you need it
337 if (par.params().align() == LYX_ALIGN_LAYOUT)
338 align = layout->align;
340 align = par.params().align();
342 // Display-style insets should always be on a centred row
343 // The test on par.size() is to catch zero-size pars, which
344 // would trigger the assert in Paragraph::getInset().
345 //inset = par.size() ? par.getInset(row.pos()) : 0;
346 if (row.pos() < par.size()
347 && par.isInset(row.pos()))
349 switch(par.getInset(row.pos())->display()) {
350 case Inset::AlignLeft:
351 align = LYX_ALIGN_BLOCK;
353 case Inset::AlignCenter:
354 align = LYX_ALIGN_CENTER;
357 case Inset::AlignRight:
358 // unchanged (use align)
364 case LYX_ALIGN_BLOCK: {
365 int const ns = numberOfSeparators(par, row);
366 bool disp_inset = false;
367 if (row.endpos() < par.size()) {
368 Inset const * in = par.getInset(row.endpos());
370 disp_inset = in->display();
372 // If we have separators, this is not the last row of a
373 // par, does not end in newline, and is not row above a
374 // display inset... then stretch it
376 && row.endpos() < par.size()
377 && !par.isNewline(row.endpos() - 1)
380 row.separator = w / ns;
386 case LYX_ALIGN_RIGHT:
389 case LYX_ALIGN_CENTER:
396 pos_type body_pos = par.beginOfBody();
397 pos_type end = row.endpos();
400 && (body_pos > end || !par.isLineSeparator(body_pos - 1)))
402 row.x += theFontMetrics(text_->getLabelFont(buffer, par)).
403 width(layout->labelsep);
405 row.x += row.label_hfill;
411 int TextMetrics::labelFill(pit_type const pit, Row const & row) const
413 Buffer & buffer = bv_->buffer();
414 Paragraph const & par = text_->getPar(pit);
416 pos_type last = par.beginOfBody();
417 BOOST_ASSERT(last > 0);
419 // -1 because a label ends with a space that is in the label
422 // a separator at this end does not count
423 if (par.isLineSeparator(last))
427 for (pos_type i = row.pos(); i <= last; ++i)
428 w += singleWidth(pit, i);
430 docstring const & label = par.params().labelWidthString();
434 FontMetrics const & fm
435 = theFontMetrics(text_->getLabelFont(buffer, par));
437 return max(0, fm.width(label) - w);
443 // this needs special handling - only newlines count as a break point
444 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
446 pos_type const end = par.size();
449 if (par.isNewline(i))
458 int TextMetrics::labelEnd(pit_type const pit) const
460 // labelEnd is only needed if the layout fills a flushleft label.
461 if (text_->getPar(pit).layout()->margintype != MARGIN_MANUAL)
463 // return the beginning of the body
464 return text_->leftMargin(bv_->buffer(), max_width_, pit);
468 pit_type TextMetrics::rowBreakPoint(int width, pit_type const pit,
471 Buffer & buffer = bv_->buffer();
472 ParagraphMetrics const & pm = par_metrics_[pit];
473 Paragraph const & par = text_->getPar(pit);
474 pos_type const end = par.size();
475 if (pos == end || width < 0)
478 LayoutPtr const & layout = par.layout();
480 if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX)
481 return addressBreakPoint(pos, par);
483 pos_type const body_pos = par.beginOfBody();
486 // Now we iterate through until we reach the right margin
487 // or the end of the par, then choose the possible break
490 int label_end = labelEnd(pit);
491 int const left = text_->leftMargin(buffer, max_width_, pit, pos);
494 // pixel width since last breakpoint
497 FontIterator fi = FontIterator(buffer, *text_, par, pos);
498 pos_type point = end;
500 for ( ; i < end; ++i, ++fi) {
501 int thiswidth = pm.singleWidth(i, *fi);
503 // add the auto-hfill from label end to the body
504 if (body_pos && i == body_pos) {
505 FontMetrics const & fm = theFontMetrics(
506 text_->getLabelFont(buffer, par));
507 int add = fm.width(layout->labelsep);
508 if (par.isLineSeparator(i - 1))
509 add -= singleWidth(pit, i - 1);
511 add = std::max(add, label_end - x);
516 chunkwidth += thiswidth;
518 // break before a character that will fall off
519 // the right of the row
521 // if no break before, break here
522 if (point == end || chunkwidth >= width - left) {
529 // exit on last registered breakpoint:
533 if (par.isNewline(i)) {
539 if (par.isInset(i + 1) && par.getInset(i + 1)->display()) {
544 if (par.isInset(i) && par.getInset(i)->display()) {
550 if (!par.isInset(i) || par.getInset(i)->isChar()) {
551 // some insets are line separators too
552 if (par.isLineSeparator(i)) {
553 // register breakpoint:
560 // maybe found one, but the par is short enough.
561 if (i == end && x < width)
564 // manual labels cannot be broken in LaTeX. But we
565 // want to make our on-screen rendering of footnotes
567 if (body_pos && point < body_pos)
574 int TextMetrics::rowWidth(int right_margin, pit_type const pit,
575 pos_type const first, pos_type const end) const
577 Buffer & buffer = bv_->buffer();
578 // get the pure distance
579 ParagraphMetrics const & pm = par_metrics_[pit];
580 Paragraph const & par = text_->getPar(pit);
581 int w = text_->leftMargin(buffer, max_width_, pit, first);
582 int label_end = labelEnd(pit);
584 pos_type const body_pos = par.beginOfBody();
588 FontIterator fi = FontIterator(buffer, *text_, par, i);
589 for ( ; i < end; ++i, ++fi) {
590 if (body_pos > 0 && i == body_pos) {
591 FontMetrics const & fm = theFontMetrics(
592 text_->getLabelFont(buffer, par));
593 w += fm.width(par.layout()->labelsep);
594 if (par.isLineSeparator(i - 1))
595 w -= singleWidth(pit, i - 1);
596 w = max(w, label_end);
598 w += pm.singleWidth(i, *fi);
602 if (body_pos > 0 && body_pos >= end) {
603 FontMetrics const & fm = theFontMetrics(
604 text_->getLabelFont(buffer, par));
605 w += fm.width(par.layout()->labelsep);
606 if (end > 0 && par.isLineSeparator(end - 1))
607 w -= singleWidth(pit, end - 1);
608 w = max(w, label_end);
611 return w + right_margin;
615 boost::tuple<int, int> TextMetrics::rowHeight(pit_type const pit, pos_type const first,
616 pos_type const end) const
618 Paragraph const & par = text_->getPar(pit);
619 // get the maximum ascent and the maximum descent
620 double layoutasc = 0;
621 double layoutdesc = 0;
622 double const dh = defaultRowHeight();
624 // ok, let us initialize the maxasc and maxdesc value.
625 // Only the fontsize count. The other properties
626 // are taken from the layoutfont. Nicer on the screen :)
627 LayoutPtr const & layout = par.layout();
629 // as max get the first character of this row then it can
630 // increase but not decrease the height. Just some point to
631 // start with so we don't have to do the assignment below too
633 Buffer const & buffer = bv_->buffer();
634 Font font = text_->getFont(buffer, par, first);
635 Font::FONT_SIZE const tmpsize = font.size();
636 font = text_->getLayoutFont(buffer, pit);
637 Font::FONT_SIZE const size = font.size();
638 font.setSize(tmpsize);
640 Font labelfont = text_->getLabelFont(buffer, par);
642 FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
643 FontMetrics const & fontmetrics = theFontMetrics(font);
645 // these are minimum values
646 double const spacing_val = layout->spacing.getValue()
647 * text_->spacing(buffer, par);
648 //lyxerr << "spacing_val = " << spacing_val << endl;
649 int maxasc = int(fontmetrics.maxAscent() * spacing_val);
650 int maxdesc = int(fontmetrics.maxDescent() * spacing_val);
652 // insets may be taller
653 InsetList::const_iterator ii = par.insetlist.begin();
654 InsetList::const_iterator iend = par.insetlist.end();
655 for ( ; ii != iend; ++ii) {
656 if (ii->pos >= first && ii->pos < end) {
657 maxasc = max(maxasc, ii->inset->ascent());
658 maxdesc = max(maxdesc, ii->inset->descent());
662 // Check if any custom fonts are larger (Asger)
663 // This is not completely correct, but we can live with the small,
664 // cosmetic error for now.
667 Font::FONT_SIZE maxsize =
668 par.highestFontInRange(first, end, size);
669 if (maxsize > font.size()) {
670 // use standard paragraph font with the maximal size
672 maxfont.setSize(maxsize);
673 FontMetrics const & maxfontmetrics = theFontMetrics(maxfont);
674 maxasc = max(maxasc, maxfontmetrics.maxAscent());
675 maxdesc = max(maxdesc, maxfontmetrics.maxDescent());
678 // This is nicer with box insets:
682 ParagraphList const & pars = text_->paragraphs();
686 BufferParams const & bufparams = buffer.params();
687 // some parskips VERY EASY IMPLEMENTATION
688 if (bufparams.paragraph_separation
689 == BufferParams::PARSEP_SKIP
690 && par.ownerCode() != Inset::ERT_CODE
691 && par.ownerCode() != Inset::LISTINGS_CODE
693 && ((layout->isParagraph() && par.getDepth() == 0)
694 || (pars[pit - 1].layout()->isParagraph()
695 && pars[pit - 1].getDepth() == 0)))
697 maxasc += bufparams.getDefSkip().inPixels(*bv_);
700 if (par.params().startOfAppendix())
701 maxasc += int(3 * dh);
703 // This is special code for the chapter, since the label of this
704 // layout is printed in an extra row
705 if (layout->counter == "chapter"
706 && !par.params().labelString().empty()) {
707 labeladdon = int(labelfont_metrics.maxHeight()
708 * layout->spacing.getValue()
709 * text_->spacing(buffer, par));
712 // special code for the top label
713 if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
714 || layout->labeltype == LABEL_BIBLIO
715 || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
716 && isFirstInSequence(pit, pars)
717 && !par.getLabelstring().empty())
720 labelfont_metrics.maxHeight()
721 * layout->spacing.getValue()
722 * text_->spacing(buffer, par)
723 + (layout->topsep + layout->labelbottomsep) * dh);
726 // Add the layout spaces, for example before and after
727 // a section, or between the items of a itemize or enumerate
730 pit_type prev = depthHook(pit, pars, par.getDepth());
731 Paragraph const & prevpar = pars[prev];
733 && prevpar.layout() == layout
734 && prevpar.getDepth() == par.getDepth()
735 && prevpar.getLabelWidthString()
736 == par.getLabelWidthString()) {
737 layoutasc = layout->itemsep * dh;
738 } else if (pit != 0 || first != 0) {
739 if (layout->topsep > 0)
740 layoutasc = layout->topsep * dh;
743 prev = outerHook(pit, pars);
744 if (prev != pit_type(pars.size())) {
745 maxasc += int(pars[prev].layout()->parsep * dh);
746 } else if (pit != 0) {
747 Paragraph const & prevpar = pars[pit - 1];
748 if (prevpar.getDepth() != 0 ||
749 prevpar.layout() == layout) {
750 maxasc += int(layout->parsep * dh);
755 // is it a bottom line?
756 if (end >= par.size()) {
757 // add the layout spaces, for example before and after
758 // a section, or between the items of a itemize or enumerate
760 pit_type nextpit = pit + 1;
761 if (nextpit != pit_type(pars.size())) {
766 if (pars[cpit].getDepth() > pars[nextpit].getDepth()) {
767 usual = pars[cpit].layout()->bottomsep * dh;
768 cpit = depthHook(cpit, pars, pars[nextpit].getDepth());
769 if (pars[cpit].layout() != pars[nextpit].layout()
770 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
772 unusual = pars[cpit].layout()->bottomsep * dh;
774 layoutdesc = max(unusual, usual);
775 } else if (pars[cpit].getDepth() == pars[nextpit].getDepth()) {
776 if (pars[cpit].layout() != pars[nextpit].layout()
777 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
778 layoutdesc = int(pars[cpit].layout()->bottomsep * dh);
783 // incalculate the layout spaces
784 maxasc += int(layoutasc * 2 / (2 + pars[pit].getDepth()));
785 maxdesc += int(layoutdesc * 2 / (2 + pars[pit].getDepth()));
787 // FIXME: the correct way is to do the following is to move the
788 // following code in another method specially tailored for the
789 // main Text. The following test is thus bogus.
790 // Top and bottom margin of the document (only at top-level)
792 if (pit == 0 && first == 0)
794 if (pit + 1 == pit_type(pars.size()) &&
796 !(end > 0 && par.isNewline(end - 1)))
800 return boost::make_tuple(maxasc + labeladdon, maxdesc);
804 // x is an absolute screen coord
805 // returns the column near the specified x-coordinate of the row
806 // x is set to the real beginning of this column
807 pos_type TextMetrics::getColumnNearX(pit_type const pit,
808 Row const & row, int & x, bool & boundary) const
810 Buffer const & buffer = bv_->buffer();
812 /// For the main Text, it is possible that this pit is not
813 /// yet in the CoordCache when moving cursor up.
814 /// x Paragraph coordinate is always 0 for main text anyway.
815 int const xo = main_text_? 0 : bv_->coordCache().get(text_, pit).x_;
817 Paragraph const & par = text_->getPar(pit);
819 bidi.computeTables(par, buffer, row);
821 pos_type vc = row.pos();
822 pos_type end = row.endpos();
824 LayoutPtr const & layout = par.layout();
826 bool left_side = false;
828 pos_type body_pos = par.beginOfBody();
831 double last_tmpx = tmpx;
834 (body_pos > end || !par.isLineSeparator(body_pos - 1)))
837 // check for empty row
843 while (vc < end && tmpx <= x) {
844 c = bidi.vis2log(vc);
846 if (body_pos > 0 && c == body_pos - 1) {
847 FontMetrics const & fm = theFontMetrics(
848 text_->getLabelFont(buffer, par));
849 tmpx += row.label_hfill + fm.width(layout->labelsep);
850 if (par.isLineSeparator(body_pos - 1))
851 tmpx -= singleWidth(pit, body_pos - 1);
854 if (par.hfillExpansion(row, c)) {
855 tmpx += singleWidth(pit, c);
859 tmpx += row.label_hfill;
860 } else if (par.isSeparator(c)) {
861 tmpx += singleWidth(pit, c);
863 tmpx += row.separator;
865 tmpx += singleWidth(pit, c);
870 if ((tmpx + last_tmpx) / 2 > x) {
875 BOOST_ASSERT(vc <= end); // This shouldn't happen.
878 // This (rtl_support test) is not needed, but gives
879 // some speedup if rtl_support == false
880 bool const lastrow = lyxrc.rtl_support && row.endpos() == par.size();
882 // If lastrow is false, we don't need to compute
884 bool const rtl = lastrow ? text_->isRTL(buffer, par) : false;
886 ((rtl && left_side && vc == row.pos() && x < tmpx - 5) ||
887 (!rtl && !left_side && vc == end && x > tmpx + 5)))
889 else if (vc == row.pos()) {
890 c = bidi.vis2log(vc);
891 if (bidi.level(c) % 2 == 1)
894 c = bidi.vis2log(vc - 1);
895 bool const rtl = (bidi.level(c) % 2 == 1);
896 if (left_side == rtl) {
898 boundary = text_->isRTLBoundary(buffer, par, c);
902 // I believe this code is not needed anymore (Jug 20050717)
904 // The following code is necessary because the cursor position past
905 // the last char in a row is logically equivalent to that before
906 // the first char in the next row. That's why insets causing row
907 // divisions -- Newline and display-style insets -- must be treated
908 // specially, so cursor up/down doesn't get stuck in an air gap -- MV
909 // Newline inset, air gap below:
910 if (row.pos() < end && c >= end && par.isNewline(end - 1)) {
911 if (bidi.level(end -1) % 2 == 0)
912 tmpx -= singleWidth(pit, end - 1);
914 tmpx += singleWidth(pit, end - 1);
918 // Air gap above display inset:
919 if (row.pos() < end && c >= end && end < par.size()
920 && par.isInset(end) && par.getInset(end)->display()) {
923 // Air gap below display inset:
924 if (row.pos() < end && c >= end && par.isInset(end - 1)
925 && par.getInset(end - 1)->display()) {
931 pos_type const col = c - row.pos();
933 if (!c || end == par.size())
936 if (c==end && !par.isLineSeparator(c-1) && !par.isNewline(c-1)) {
941 return min(col, end - 1 - row.pos());
945 pos_type TextMetrics::x2pos(pit_type pit, int row, int x) const
947 ParagraphMetrics const & pm = par_metrics_[pit];
948 BOOST_ASSERT(!pm.rows().empty());
949 BOOST_ASSERT(row < int(pm.rows().size()));
951 Row const & r = pm.rows()[row];
952 return r.pos() + getColumnNearX(pit, r, x, bound);
956 int TextMetrics::singleWidth(pit_type pit, pos_type pos) const
958 Buffer const & buffer = bv_->buffer();
959 ParagraphMetrics const & pm = par_metrics_[pit];
961 return pm.singleWidth(pos, text_->getFont(buffer, text_->getPar(pit), pos));
965 // only used for inset right now. should also be used for main text
966 void TextMetrics::draw(PainterInfo & pi, int x, int y) const
968 if (par_metrics_.empty())
970 ParMetricsCache::const_iterator it = par_metrics_.begin();
971 ParMetricsCache::const_iterator const end = par_metrics_.end();
972 y -= it->second.ascent();
973 for (; it != end; ++it) {
974 ParagraphMetrics const & pmi = it->second;
976 drawParagraph(pi, it->first, x, y, true);
982 void TextMetrics::drawParagraph(PainterInfo & pi, pit_type pit, int x, int y,
983 bool repaintAll) const
985 // lyxerr << " paintPar: pit: " << pit << " at y: " << y << endl;
986 int const ww = bv_->workHeight();
988 bv_->coordCache().parPos()[text_][pit] = Point(x, y);
990 ParagraphMetrics const & pm = par_metrics_[pit];
991 if (pm.rows().empty())
994 RowList::const_iterator const rb = pm.rows().begin();
995 RowList::const_iterator const re = pm.rows().end();
1000 for (RowList::const_iterator rit = rb; rit != re; ++rit) {
1002 // Row signature; has row changed since last paint?
1003 bool row_has_changed = rit->changed();
1005 // Paint the row if a full repaint has been requested or it has
1007 if (repaintAll || row_has_changed) {
1008 bool const inside = (y + rit->descent() >= 0
1009 && y - rit->ascent() < ww);
1010 // it is not needed to draw on screen if we are not inside.
1011 pi.pain.setDrawingEnabled(inside);
1012 RowPainter rp(pi, *text_, pit, *rit, bidi, x, y);
1013 // Clear background of this row
1014 // (if paragraph background was not cleared)
1015 if (!repaintAll && row_has_changed)
1016 pi.pain.fillRectangle(x, y - rit->ascent(),
1017 width(), rit->height(),
1018 text_->backgroundColor());
1020 // Instrumentation for testing row cache (see also
1022 if (lyxerr.debugging(Debug::PAINTING)) {
1023 if (text_->isMainText(bv_->buffer()))
1024 LYXERR(Debug::PAINTING) << "#";
1026 LYXERR(Debug::PAINTING) << "[" <<
1027 repaintAll << row_has_changed << "]";
1031 rp.paintChangeBar();
1038 y += rit->descent();
1040 // Re-enable screen drawing for future use of the painter.
1041 pi.pain.setDrawingEnabled(true);
1043 LYXERR(Debug::PAINTING) << "." << endl;
1046 //int Text::pos2x(pit_type pit, pos_type pos) const
1048 // ParagraphMetrics const & pm = par_metrics_[pit];
1049 // Row const & r = pm.rows()[row];
1055 int defaultRowHeight()
1057 return int(theFontMetrics(Font(Font::ALL_SANE)).maxHeight() * 1.2);