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 // Make sure that if a par ends in newline, there is one more row
264 if (first > 0 && par.isNewline(first - 1)) {
266 dim.wid = rowWidth(right_margin, pit, first, first);
267 boost::tie(dim.asc, dim.des) = rowHeight(pit, first, first);
268 if (row_index == pm.rows().size())
269 pm.rows().push_back(Row());
270 Row & row = pm.rows()[row_index];
273 row.setDimension(dim);
274 computeRowMetrics(pit, row);
275 pm.computeRowSignature(row, bparams);
276 pm.dim().des += dim.height();
279 pm.dim().asc += pm.rows()[0].ascent();
280 pm.dim().des -= pm.rows()[0].ascent();
282 changed |= old_dim.height() != pm.dim().height();
287 void TextMetrics::computeRowMetrics(pit_type const pit,
290 Buffer & buffer = bv_->buffer();
291 Paragraph const & par = text_->getPar(pit);
293 double w = dim_.wid - row.width();
295 bool const is_rtl = text_->isRTL(buffer, par);
297 row.x = rightMargin(pit);
299 row.x = text_->leftMargin(buffer, max_width_, pit, row.pos());
301 // is there a manual margin with a manual label
302 LayoutPtr const & layout = par.layout();
304 if (layout->margintype == MARGIN_MANUAL
305 && layout->labeltype == LABEL_MANUAL) {
306 /// We might have real hfills in the label part
307 int nlh = numberOfLabelHfills(par, row);
309 // A manual label par (e.g. List) has an auto-hfill
310 // between the label text and the body of the
312 // But we don't want to do this auto hfill if the par
317 if (nlh && !par.getLabelWidthString().empty())
318 row.label_hfill = labelFill(pit, row) / double(nlh);
321 // are there any hfills in the row?
322 int const nh = numberOfHfills(par, row);
327 // we don't have to look at the alignment if it is ALIGN_LEFT and
328 // if the row is already larger then the permitted width as then
329 // we force the LEFT_ALIGN'edness!
330 } else if (int(row.width()) < max_width_) {
331 // is it block, flushleft or flushright?
332 // set x how you need it
334 if (par.params().align() == LYX_ALIGN_LAYOUT)
335 align = layout->align;
337 align = par.params().align();
339 // Display-style insets should always be on a centred row
340 // The test on par.size() is to catch zero-size pars, which
341 // would trigger the assert in Paragraph::getInset().
342 //inset = par.size() ? par.getInset(row.pos()) : 0;
343 if (row.pos() < par.size()
344 && par.isInset(row.pos()))
346 switch(par.getInset(row.pos())->display()) {
347 case Inset::AlignLeft:
348 align = LYX_ALIGN_BLOCK;
350 case Inset::AlignCenter:
351 align = LYX_ALIGN_CENTER;
354 case Inset::AlignRight:
355 // unchanged (use align)
361 case LYX_ALIGN_BLOCK: {
362 int const ns = numberOfSeparators(par, row);
363 bool disp_inset = false;
364 if (row.endpos() < par.size()) {
365 Inset const * in = par.getInset(row.endpos());
367 disp_inset = in->display();
369 // If we have separators, this is not the last row of a
370 // par, does not end in newline, and is not row above a
371 // display inset... then stretch it
373 && row.endpos() < par.size()
374 && !par.isNewline(row.endpos() - 1)
377 row.separator = w / ns;
383 case LYX_ALIGN_RIGHT:
386 case LYX_ALIGN_CENTER:
393 pos_type body_pos = par.beginOfBody();
394 pos_type end = row.endpos();
397 && (body_pos > end || !par.isLineSeparator(body_pos - 1)))
399 row.x += theFontMetrics(text_->getLabelFont(buffer, par)).
400 width(layout->labelsep);
402 row.x += row.label_hfill;
408 int TextMetrics::labelFill(pit_type const pit, Row const & row) const
410 Buffer & buffer = bv_->buffer();
411 Paragraph const & par = text_->getPar(pit);
413 pos_type last = par.beginOfBody();
414 BOOST_ASSERT(last > 0);
416 // -1 because a label ends with a space that is in the label
419 // a separator at this end does not count
420 if (par.isLineSeparator(last))
424 for (pos_type i = row.pos(); i <= last; ++i)
425 w += singleWidth(pit, i);
427 docstring const & label = par.params().labelWidthString();
431 FontMetrics const & fm
432 = theFontMetrics(text_->getLabelFont(buffer, par));
434 return max(0, fm.width(label) - w);
440 // this needs special handling - only newlines count as a break point
441 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
443 pos_type const end = par.size();
446 if (par.isNewline(i))
455 int TextMetrics::labelEnd(pit_type const pit) const
457 // labelEnd is only needed if the layout fills a flushleft label.
458 if (text_->getPar(pit).layout()->margintype != MARGIN_MANUAL)
460 // return the beginning of the body
461 return text_->leftMargin(bv_->buffer(), max_width_, pit);
465 pit_type TextMetrics::rowBreakPoint(int width, pit_type const pit,
468 Buffer & buffer = bv_->buffer();
469 ParagraphMetrics const & pm = par_metrics_[pit];
470 Paragraph const & par = text_->getPar(pit);
471 pos_type const end = par.size();
472 if (pos == end || width < 0)
475 LayoutPtr const & layout = par.layout();
477 if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX)
478 return addressBreakPoint(pos, par);
480 pos_type const body_pos = par.beginOfBody();
483 // Now we iterate through until we reach the right margin
484 // or the end of the par, then choose the possible break
487 int label_end = labelEnd(pit);
488 int const left = text_->leftMargin(buffer, max_width_, pit, pos);
491 // pixel width since last breakpoint
494 FontIterator fi = FontIterator(buffer, *text_, par, pos);
495 pos_type point = end;
497 for ( ; i < end; ++i, ++fi) {
498 int thiswidth = pm.singleWidth(i, *fi);
500 // add the auto-hfill from label end to the body
501 if (body_pos && i == body_pos) {
502 FontMetrics const & fm = theFontMetrics(
503 text_->getLabelFont(buffer, par));
504 int add = fm.width(layout->labelsep);
505 if (par.isLineSeparator(i - 1))
506 add -= singleWidth(pit, i - 1);
508 add = std::max(add, label_end - x);
513 chunkwidth += thiswidth;
515 // break before a character that will fall off
516 // the right of the row
518 // if no break before, break here
519 if (point == end || chunkwidth >= width - left) {
526 // exit on last registered breakpoint:
530 if (par.isNewline(i)) {
536 if (par.isInset(i + 1) && par.getInset(i + 1)->display()) {
541 if (par.isInset(i) && par.getInset(i)->display()) {
547 if (!par.isInset(i) || par.getInset(i)->isChar()) {
548 // some insets are line separators too
549 if (par.isLineSeparator(i)) {
550 // register breakpoint:
557 // maybe found one, but the par is short enough.
558 if (i == end && x < width)
561 // manual labels cannot be broken in LaTeX. But we
562 // want to make our on-screen rendering of footnotes
564 if (body_pos && point < body_pos)
571 int TextMetrics::rowWidth(int right_margin, pit_type const pit,
572 pos_type const first, pos_type const end) const
574 Buffer & buffer = bv_->buffer();
575 // get the pure distance
576 ParagraphMetrics const & pm = par_metrics_[pit];
577 Paragraph const & par = text_->getPar(pit);
578 int w = text_->leftMargin(buffer, max_width_, pit, first);
579 int label_end = labelEnd(pit);
581 pos_type const body_pos = par.beginOfBody();
585 FontIterator fi = FontIterator(buffer, *text_, par, i);
586 for ( ; i < end; ++i, ++fi) {
587 if (body_pos > 0 && i == body_pos) {
588 FontMetrics const & fm = theFontMetrics(
589 text_->getLabelFont(buffer, par));
590 w += fm.width(par.layout()->labelsep);
591 if (par.isLineSeparator(i - 1))
592 w -= singleWidth(pit, i - 1);
593 w = max(w, label_end);
595 w += pm.singleWidth(i, *fi);
599 if (body_pos > 0 && body_pos >= end) {
600 FontMetrics const & fm = theFontMetrics(
601 text_->getLabelFont(buffer, par));
602 w += fm.width(par.layout()->labelsep);
603 if (end > 0 && par.isLineSeparator(end - 1))
604 w -= singleWidth(pit, end - 1);
605 w = max(w, label_end);
608 return w + right_margin;
612 boost::tuple<int, int> TextMetrics::rowHeight(pit_type const pit, pos_type const first,
613 pos_type const end) const
615 Paragraph const & par = text_->getPar(pit);
616 // get the maximum ascent and the maximum descent
617 double layoutasc = 0;
618 double layoutdesc = 0;
619 double const dh = defaultRowHeight();
621 // ok, let us initialize the maxasc and maxdesc value.
622 // Only the fontsize count. The other properties
623 // are taken from the layoutfont. Nicer on the screen :)
624 LayoutPtr const & layout = par.layout();
626 // as max get the first character of this row then it can
627 // increase but not decrease the height. Just some point to
628 // start with so we don't have to do the assignment below too
630 Buffer const & buffer = bv_->buffer();
631 Font font = text_->getFont(buffer, par, first);
632 Font::FONT_SIZE const tmpsize = font.size();
633 font = text_->getLayoutFont(buffer, pit);
634 Font::FONT_SIZE const size = font.size();
635 font.setSize(tmpsize);
637 Font labelfont = text_->getLabelFont(buffer, par);
639 FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
640 FontMetrics const & fontmetrics = theFontMetrics(font);
642 // these are minimum values
643 double const spacing_val = layout->spacing.getValue()
644 * text_->spacing(buffer, par);
645 //lyxerr << "spacing_val = " << spacing_val << endl;
646 int maxasc = int(fontmetrics.maxAscent() * spacing_val);
647 int maxdesc = int(fontmetrics.maxDescent() * spacing_val);
649 // insets may be taller
650 InsetList::const_iterator ii = par.insetlist.begin();
651 InsetList::const_iterator iend = par.insetlist.end();
652 for ( ; ii != iend; ++ii) {
653 if (ii->pos >= first && ii->pos < end) {
654 maxasc = max(maxasc, ii->inset->ascent());
655 maxdesc = max(maxdesc, ii->inset->descent());
659 // Check if any custom fonts are larger (Asger)
660 // This is not completely correct, but we can live with the small,
661 // cosmetic error for now.
664 Font::FONT_SIZE maxsize =
665 par.highestFontInRange(first, end, size);
666 if (maxsize > font.size()) {
667 // use standard paragraph font with the maximal size
669 maxfont.setSize(maxsize);
670 FontMetrics const & maxfontmetrics = theFontMetrics(maxfont);
671 maxasc = max(maxasc, maxfontmetrics.maxAscent());
672 maxdesc = max(maxdesc, maxfontmetrics.maxDescent());
675 // This is nicer with box insets:
679 ParagraphList const & pars = text_->paragraphs();
683 BufferParams const & bufparams = buffer.params();
684 // some parskips VERY EASY IMPLEMENTATION
685 if (bufparams.paragraph_separation
686 == BufferParams::PARSEP_SKIP
687 && par.ownerCode() != Inset::ERT_CODE
688 && par.ownerCode() != Inset::LISTINGS_CODE
690 && ((layout->isParagraph() && par.getDepth() == 0)
691 || (pars[pit - 1].layout()->isParagraph()
692 && pars[pit - 1].getDepth() == 0)))
694 maxasc += bufparams.getDefSkip().inPixels(*bv_);
697 if (par.params().startOfAppendix())
698 maxasc += int(3 * dh);
700 // This is special code for the chapter, since the label of this
701 // layout is printed in an extra row
702 if (layout->counter == "chapter"
703 && !par.params().labelString().empty()) {
704 labeladdon = int(labelfont_metrics.maxHeight()
705 * layout->spacing.getValue()
706 * text_->spacing(buffer, par));
709 // special code for the top label
710 if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
711 || layout->labeltype == LABEL_BIBLIO
712 || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
713 && isFirstInSequence(pit, pars)
714 && !par.getLabelstring().empty())
717 labelfont_metrics.maxHeight()
718 * layout->spacing.getValue()
719 * text_->spacing(buffer, par)
720 + (layout->topsep + layout->labelbottomsep) * dh);
723 // Add the layout spaces, for example before and after
724 // a section, or between the items of a itemize or enumerate
727 pit_type prev = depthHook(pit, pars, par.getDepth());
728 Paragraph const & prevpar = pars[prev];
730 && prevpar.layout() == layout
731 && prevpar.getDepth() == par.getDepth()
732 && prevpar.getLabelWidthString()
733 == par.getLabelWidthString()) {
734 layoutasc = layout->itemsep * dh;
735 } else if (pit != 0 || first != 0) {
736 if (layout->topsep > 0)
737 layoutasc = layout->topsep * dh;
740 prev = outerHook(pit, pars);
741 if (prev != pit_type(pars.size())) {
742 maxasc += int(pars[prev].layout()->parsep * dh);
743 } else if (pit != 0) {
744 Paragraph const & prevpar = pars[pit - 1];
745 if (prevpar.getDepth() != 0 ||
746 prevpar.layout() == layout) {
747 maxasc += int(layout->parsep * dh);
752 // is it a bottom line?
753 if (end >= par.size()) {
754 // add the layout spaces, for example before and after
755 // a section, or between the items of a itemize or enumerate
757 pit_type nextpit = pit + 1;
758 if (nextpit != pit_type(pars.size())) {
763 if (pars[cpit].getDepth() > pars[nextpit].getDepth()) {
764 usual = pars[cpit].layout()->bottomsep * dh;
765 cpit = depthHook(cpit, pars, pars[nextpit].getDepth());
766 if (pars[cpit].layout() != pars[nextpit].layout()
767 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
769 unusual = pars[cpit].layout()->bottomsep * dh;
771 layoutdesc = max(unusual, usual);
772 } else if (pars[cpit].getDepth() == pars[nextpit].getDepth()) {
773 if (pars[cpit].layout() != pars[nextpit].layout()
774 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
775 layoutdesc = int(pars[cpit].layout()->bottomsep * dh);
780 // incalculate the layout spaces
781 maxasc += int(layoutasc * 2 / (2 + pars[pit].getDepth()));
782 maxdesc += int(layoutdesc * 2 / (2 + pars[pit].getDepth()));
784 // FIXME: the correct way is to do the following is to move the
785 // following code in another method specially tailored for the
786 // main Text. The following test is thus bogus.
787 // Top and bottom margin of the document (only at top-level)
789 if (pit == 0 && first == 0)
791 if (pit + 1 == pit_type(pars.size()) &&
793 !(end > 0 && par.isNewline(end - 1)))
797 return boost::make_tuple(maxasc + labeladdon, maxdesc);
801 // x is an absolute screen coord
802 // returns the column near the specified x-coordinate of the row
803 // x is set to the real beginning of this column
804 pos_type TextMetrics::getColumnNearX(pit_type const pit,
805 Row const & row, int & x, bool & boundary) const
807 Buffer const & buffer = bv_->buffer();
809 /// For the main Text, it is possible that this pit is not
810 /// yet in the CoordCache when moving cursor up.
811 /// x Paragraph coordinate is always 0 for main text anyway.
812 int const xo = main_text_? 0 : bv_->coordCache().get(text_, pit).x_;
814 Paragraph const & par = text_->getPar(pit);
816 bidi.computeTables(par, buffer, row);
818 pos_type vc = row.pos();
819 pos_type end = row.endpos();
821 LayoutPtr const & layout = par.layout();
823 bool left_side = false;
825 pos_type body_pos = par.beginOfBody();
828 double last_tmpx = tmpx;
831 (body_pos > end || !par.isLineSeparator(body_pos - 1)))
834 // check for empty row
840 while (vc < end && tmpx <= x) {
841 c = bidi.vis2log(vc);
843 if (body_pos > 0 && c == body_pos - 1) {
844 FontMetrics const & fm = theFontMetrics(
845 text_->getLabelFont(buffer, par));
846 tmpx += row.label_hfill + fm.width(layout->labelsep);
847 if (par.isLineSeparator(body_pos - 1))
848 tmpx -= singleWidth(pit, body_pos - 1);
851 if (par.hfillExpansion(row, c)) {
852 tmpx += singleWidth(pit, c);
856 tmpx += row.label_hfill;
857 } else if (par.isSeparator(c)) {
858 tmpx += singleWidth(pit, c);
860 tmpx += row.separator;
862 tmpx += singleWidth(pit, c);
867 if ((tmpx + last_tmpx) / 2 > x) {
872 BOOST_ASSERT(vc <= end); // This shouldn't happen.
875 // This (rtl_support test) is not needed, but gives
876 // some speedup if rtl_support == false
877 bool const lastrow = lyxrc.rtl_support && row.endpos() == par.size();
879 // If lastrow is false, we don't need to compute
881 bool const rtl = lastrow ? text_->isRTL(buffer, par) : false;
883 ((rtl && left_side && vc == row.pos() && x < tmpx - 5) ||
884 (!rtl && !left_side && vc == end && x > tmpx + 5)))
886 else if (vc == row.pos()) {
887 c = bidi.vis2log(vc);
888 if (bidi.level(c) % 2 == 1)
891 c = bidi.vis2log(vc - 1);
892 bool const rtl = (bidi.level(c) % 2 == 1);
893 if (left_side == rtl) {
895 boundary = text_->isRTLBoundary(buffer, par, c);
899 // I believe this code is not needed anymore (Jug 20050717)
901 // The following code is necessary because the cursor position past
902 // the last char in a row is logically equivalent to that before
903 // the first char in the next row. That's why insets causing row
904 // divisions -- Newline and display-style insets -- must be treated
905 // specially, so cursor up/down doesn't get stuck in an air gap -- MV
906 // Newline inset, air gap below:
907 if (row.pos() < end && c >= end && par.isNewline(end - 1)) {
908 if (bidi.level(end -1) % 2 == 0)
909 tmpx -= singleWidth(pit, end - 1);
911 tmpx += singleWidth(pit, end - 1);
915 // Air gap above display inset:
916 if (row.pos() < end && c >= end && end < par.size()
917 && par.isInset(end) && par.getInset(end)->display()) {
920 // Air gap below display inset:
921 if (row.pos() < end && c >= end && par.isInset(end - 1)
922 && par.getInset(end - 1)->display()) {
928 pos_type const col = c - row.pos();
930 if (!c || end == par.size())
933 if (c==end && !par.isLineSeparator(c-1) && !par.isNewline(c-1)) {
938 return min(col, end - 1 - row.pos());
942 pos_type TextMetrics::x2pos(pit_type pit, int row, int x) const
944 ParagraphMetrics const & pm = par_metrics_[pit];
945 BOOST_ASSERT(!pm.rows().empty());
946 BOOST_ASSERT(row < int(pm.rows().size()));
948 Row const & r = pm.rows()[row];
949 return r.pos() + getColumnNearX(pit, r, x, bound);
953 int TextMetrics::singleWidth(pit_type pit, pos_type pos) const
955 Buffer const & buffer = bv_->buffer();
956 ParagraphMetrics const & pm = par_metrics_[pit];
958 return pm.singleWidth(pos, text_->getFont(buffer, text_->getPar(pit), pos));
962 // only used for inset right now. should also be used for main text
963 void TextMetrics::draw(PainterInfo & pi, int x, int y) const
965 if (par_metrics_.empty())
967 ParMetricsCache::const_iterator it = par_metrics_.begin();
968 ParMetricsCache::const_iterator const end = par_metrics_.end();
969 y -= it->second.ascent();
970 for (; it != end; ++it) {
971 ParagraphMetrics const & pmi = it->second;
973 drawParagraph(pi, it->first, x, y, true);
979 void TextMetrics::drawParagraph(PainterInfo & pi, pit_type pit, int x, int y,
980 bool repaintAll) const
982 // lyxerr << " paintPar: pit: " << pit << " at y: " << y << endl;
983 int const ww = bv_->workHeight();
985 bv_->coordCache().parPos()[text_][pit] = Point(x, y);
987 ParagraphMetrics const & pm = par_metrics_[pit];
988 if (pm.rows().empty())
991 RowList::const_iterator const rb = pm.rows().begin();
992 RowList::const_iterator const re = pm.rows().end();
997 for (RowList::const_iterator rit = rb; rit != re; ++rit) {
999 // Row signature; has row changed since last paint?
1000 bool row_has_changed = rit->changed();
1002 // Paint the row if a full repaint has been requested or it has
1004 if (repaintAll || row_has_changed) {
1005 bool const inside = (y + rit->descent() >= 0
1006 && y - rit->ascent() < ww);
1007 // it is not needed to draw on screen if we are not inside.
1008 pi.pain.setDrawingEnabled(inside);
1009 RowPainter rp(pi, *text_, pit, *rit, bidi, x, y);
1010 // Clear background of this row
1011 // (if paragraph background was not cleared)
1012 if (!repaintAll && row_has_changed)
1013 pi.pain.fillRectangle(x, y - rit->ascent(),
1014 width(), rit->height(),
1015 text_->backgroundColor());
1017 // Instrumentation for testing row cache (see also
1019 if (lyxerr.debugging(Debug::PAINTING)) {
1020 if (text_->isMainText(bv_->buffer()))
1021 LYXERR(Debug::PAINTING) << "#";
1023 LYXERR(Debug::PAINTING) << "[" <<
1024 repaintAll << row_has_changed << "]";
1028 rp.paintChangeBar();
1035 y += rit->descent();
1037 // Re-enable screen drawing for future use of the painter.
1038 pi.pain.setDrawingEnabled(true);
1040 LYXERR(Debug::PAINTING) << "." << endl;
1043 //int Text::pos2x(pit_type pit, pos_type pos) const
1045 // ParagraphMetrics const & pm = par_metrics_[pit];
1046 // Row const & r = pm.rows()[row];
1052 int defaultRowHeight()
1054 return int(theFontMetrics(Font(Font::ALL_SANE)).maxHeight() * 1.2);