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"
25 #include "paragraph_funcs.h"
26 #include "ParIterator.h"
27 #include "CoordCache.h"
29 #include "FuncRequest.h"
30 #include "FontIterator.h"
35 #include "MetricsInfo.h"
36 #include "ParagraphParameters.h"
39 #include "frontends/FontMetrics.h"
40 #include "frontends/Painter.h"
48 using frontend::FontMetrics;
52 int numberOfSeparators(Paragraph const & par, Row const & row)
54 pos_type const first = max(row.pos(), par.beginOfBody());
55 pos_type const last = row.endpos() - 1;
57 for (pos_type p = first; p < last; ++p) {
58 if (par.isSeparator(p))
65 int numberOfLabelHfills(Paragraph const & par, Row const & row)
67 pos_type last = row.endpos() - 1;
68 pos_type first = row.pos();
70 // hfill *DO* count at the beginning of paragraphs!
72 while (first < last && par.isHfill(first))
76 last = min(last, par.beginOfBody());
78 for (pos_type p = first; p < last; ++p) {
86 int numberOfHfills(Paragraph const & par, Row const & row)
88 pos_type const last = row.endpos();
89 pos_type first = row.pos();
91 // hfill *DO* count at the beginning of paragraphs!
93 while (first < last && par.isHfill(first))
97 first = max(first, par.beginOfBody());
100 for (pos_type p = first; p < last; ++p) {
109 TextMetrics::TextMetrics(BufferView * bv, Text * text)
110 : bv_(bv), text_(text)
113 max_width_ = bv_->workWidth();
114 dim_.wid = max_width_;
118 //text_->updateLabels(*bv->buffer());
122 ParagraphMetrics const & TextMetrics::parMetrics(pit_type pit) const
124 return const_cast<TextMetrics *>(this)->parMetrics(pit, true);
128 ParagraphMetrics & TextMetrics::parMetrics(pit_type pit,
131 ParMetricsCache::iterator pmc_it = par_metrics_.find(pit);
132 if (pmc_it == par_metrics_.end()) {
133 pmc_it = par_metrics_.insert(
134 std::make_pair(pit, ParagraphMetrics(text_->getPar(pit)))).first;
136 if (pmc_it->second.rows().empty() && redo) {
139 return pmc_it->second;
143 bool TextMetrics::metrics(MetricsInfo & mi, Dimension & dim)
145 BOOST_ASSERT(mi.base.textwidth);
146 max_width_ = mi.base.textwidth;
148 //lyxerr << "Text::metrics: width: " << mi.base.textwidth
149 // << " maxWidth: " << max_width_ << "\nfont: " << mi.base.font << endl;
151 bool changed = false;
155 for (pit_type pit = 0, n = text_->paragraphs().size(); pit != n; ++pit) {
156 changed |= redoParagraph(pit);
157 ParagraphMetrics const & pm = parMetrics(pit);
164 dim.asc = parMetrics(0).ascent();
165 dim.des = h - dim.asc;
167 changed |= dim_ != dim;
173 int TextMetrics::rightMargin(ParagraphMetrics const & pm) const
175 return main_text_? pm.rightMargin(*bv_->buffer()) : 0;
179 int TextMetrics::rightMargin(pit_type const pit) const
181 return main_text_? par_metrics_[pit].rightMargin(*bv_->buffer()) : 0;
185 bool TextMetrics::redoParagraph(pit_type const pit)
187 Paragraph & par = text_->getPar(pit);
188 ParagraphMetrics pm(par);
189 Buffer & buffer = *bv_->buffer();
190 main_text_ = (text_ == &buffer.text());
191 bool changed = false;
193 // FIXME This check ought to be done somewhere else. It is the reason
194 // why text_ is not const. But then, where else to do it?
195 // Well, how can you end up with either (a) a biblio environment that
196 // has no InsetBibitem or (b) a biblio environment with more than one
197 // InsetBibitem? I think the answer is: when paragraphs are merged;
198 // when layout is set; when material is pasted.
199 int const moveCursor = par.checkBiblio(buffer.params().trackChanges);
201 const_cast<Cursor &>(bv_->cursor()).posRight();
202 else if (moveCursor < 0) {
203 Cursor & cursor = const_cast<Cursor &>(bv_->cursor());
204 if (cursor.pos() >= -moveCursor)
208 // Optimisation: this is used in the next two loops
209 // so better to calculate that once here.
210 int const right_margin = rightMargin(pm);
213 // FIXME: We should always use getFont(), see documentation of
214 // noFontChange() in Inset.h.
215 Font const bufferfont = buffer.params().getFont();
216 InsetList::const_iterator ii = par.insetlist.begin();
217 InsetList::const_iterator iend = par.insetlist.end();
218 for (; ii != iend; ++ii) {
220 int const w = max_width_ - text_->leftMargin(buffer, max_width_, pit, ii->pos)
222 Font const & font = ii->inset->noFontChange() ?
223 bufferfont : text_->getFont(buffer, par, ii->pos);
224 MetricsInfo mi(bv_, font, w);
225 changed |= ii->inset->metrics(mi, dim);
228 // rebreak the paragraph
231 par.setBeginOfBody();
233 // maximum pixel width of a row
234 int width = max_width_ - right_margin; // - leftMargin(buffer, max_width_, pit, row);
237 rowBreakPoint(width, pit, row);
238 setRowWidth(right_margin, pit, row);
239 setHeightOfRow(pit, row);
240 pm.rows().push_back(row);
241 pm.dim().wid = std::max(pm.dim().wid, row.width());
242 pm.dim().des += row.height();
244 } while (z < par.size());
246 // Make sure that if a par ends in newline, there is one more row
248 // FIXME this is a dirty trick. Now the _same_ position in the
249 // paragraph occurs in _two_ different rows, and has two different
250 // display positions, leading to weird behaviour when moving up/down.
251 if (z > 0 && par.isNewline(z - 1)) {
254 setRowWidth(right_margin, pit, row);
255 setHeightOfRow(pit, row);
256 pm.rows().push_back(row);
257 pm.dim().des += row.height();
260 pm.dim().asc += pm.rows()[0].ascent();
261 pm.dim().des -= pm.rows()[0].ascent();
263 // IMPORTANT NOTE: We pass 'false' explicitely in order to not call
264 // redoParagraph() recursively inside parMetrics.
265 Dimension old_dim = parMetrics(pit, false).dim();
267 changed |= old_dim.height() != pm.dim().height();
269 par_metrics_[pit] = pm;
271 // Update the row change statuses. The painter will need that info
272 // in order to know which row has to be repainted.
273 par_metrics_[pit].updateRowChangeStatus();
278 RowMetrics TextMetrics::computeRowMetrics(pit_type const pit,
279 Row const & row) const
282 Buffer & buffer = *bv_->buffer();
283 Paragraph const & par = text_->getPar(pit);
285 double w = dim_.wid - row.width();
287 bool const is_rtl = text_->isRTL(buffer, par);
289 result.x = rightMargin(pit);
291 result.x = text_->leftMargin(buffer, max_width_, pit, row.pos());
293 // is there a manual margin with a manual label
294 Layout_ptr const & layout = par.layout();
296 if (layout->margintype == MARGIN_MANUAL
297 && layout->labeltype == LABEL_MANUAL) {
298 /// We might have real hfills in the label part
299 int nlh = numberOfLabelHfills(par, row);
301 // A manual label par (e.g. List) has an auto-hfill
302 // between the label text and the body of the
304 // But we don't want to do this auto hfill if the par
309 if (nlh && !par.getLabelWidthString().empty())
310 result.label_hfill = labelFill(par, row) / double(nlh);
313 // are there any hfills in the row?
314 int const nh = numberOfHfills(par, row);
318 result.hfill = w / nh;
319 // we don't have to look at the alignment if it is ALIGN_LEFT and
320 // if the row is already larger then the permitted width as then
321 // we force the LEFT_ALIGN'edness!
322 } else if (int(row.width()) < max_width_) {
323 // is it block, flushleft or flushright?
324 // set x how you need it
326 if (par.params().align() == LYX_ALIGN_LAYOUT)
327 align = layout->align;
329 align = par.params().align();
331 // Display-style insets should always be on a centred row
332 // The test on par.size() is to catch zero-size pars, which
333 // would trigger the assert in Paragraph::getInset().
334 //inset = par.size() ? par.getInset(row.pos()) : 0;
336 && par.isInset(row.pos()))
338 switch(par.getInset(row.pos())->display()) {
339 case Inset::AlignLeft:
340 align = LYX_ALIGN_BLOCK;
342 case Inset::AlignCenter:
343 align = LYX_ALIGN_CENTER;
345 // other types unchanged (use align)
350 case LYX_ALIGN_BLOCK: {
351 int const ns = numberOfSeparators(par, row);
352 bool disp_inset = false;
353 if (row.endpos() < par.size()) {
354 Inset const * in = par.getInset(row.endpos());
356 disp_inset = in->display();
358 // If we have separators, this is not the last row of a
359 // par, does not end in newline, and is not row above a
360 // display inset... then stretch it
362 && row.endpos() < par.size()
363 && !par.isNewline(row.endpos() - 1)
366 result.separator = w / ns;
372 case LYX_ALIGN_RIGHT:
375 case LYX_ALIGN_CENTER:
381 text_->bidi.computeTables(par, buffer, row);
383 pos_type body_pos = par.beginOfBody();
384 pos_type end = row.endpos();
387 && (body_pos > end || !par.isLineSeparator(body_pos - 1)))
389 docstring const lsep = from_utf8(layout->labelsep);
390 result.x += theFontMetrics(text_->getLabelFont(buffer, par)).width(lsep);
392 result.x += result.label_hfill;
400 int TextMetrics::labelFill(Paragraph const & par, Row const & row) const
402 Buffer & buffer = *bv_->buffer();
404 pos_type last = par.beginOfBody();
405 BOOST_ASSERT(last > 0);
407 // -1 because a label ends with a space that is in the label
410 // a separator at this end does not count
411 if (par.isLineSeparator(last))
415 for (pos_type i = row.pos(); i <= last; ++i)
416 w += text_->singleWidth(buffer, par, i);
418 docstring const & label = par.params().labelWidthString();
422 FontMetrics const & fm
423 = theFontMetrics(text_->getLabelFont(buffer, par));
425 return max(0, fm.width(label) - w);
431 // this needs special handling - only newlines count as a break point
432 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
434 pos_type const end = par.size();
437 if (par.isNewline(i))
446 int TextMetrics::labelEnd(pit_type const pit) const
448 // labelEnd is only needed if the layout fills a flushleft label.
449 if (text_->getPar(pit).layout()->margintype != MARGIN_MANUAL)
451 // return the beginning of the body
452 return text_->leftMargin(*bv_->buffer(), max_width_, pit);
456 void TextMetrics::rowBreakPoint(int width, pit_type const pit,
459 Buffer & buffer = *bv_->buffer();
460 Paragraph const & par = text_->getPar(pit);
461 pos_type const end = par.size();
462 pos_type const pos = row.pos();
473 Layout_ptr const & layout = par.layout();
475 if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX) {
476 row.endpos(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 FontMetrics const & fm = theFontMetrics(text_->getLabelFont(buffer, par));
498 for ( ; i < end; ++i, ++fi) {
499 char_type const c = par.getChar(i);
500 int thiswidth = text_->singleWidth(par, i, c, *fi);
502 // add the auto-hfill from label end to the body
503 if (body_pos && i == body_pos) {
504 docstring lsep = from_utf8(layout->labelsep);
505 int add = fm.width(lsep);
506 if (par.isLineSeparator(i - 1))
507 add -= text_->singleWidth(buffer, par, i - 1);
509 add = std::max(add, label_end - x);
514 chunkwidth += thiswidth;
516 // break before a character that will fall off
517 // the right of the row
519 // if no break before, break here
520 if (point == end || chunkwidth >= width - left) {
527 // exit on last registered breakpoint:
531 if (par.isNewline(i)) {
537 if (par.isInset(i + 1) && par.getInset(i + 1)->display()) {
542 if (par.isInset(i) && par.getInset(i)->display()) {
548 if (!par.isInset(i) || par.getInset(i)->isChar()) {
549 // some insets are line separators too
550 if (par.isLineSeparator(i)) {
551 // register breakpoint:
558 // maybe found one, but the par is short enough.
559 if (i == end && x < width)
562 // manual labels cannot be broken in LaTeX. But we
563 // want to make our on-screen rendering of footnotes
565 if (body_pos && point < body_pos)
572 void TextMetrics::setRowWidth(int right_margin,
573 pit_type const pit, Row & row) const
575 Buffer & buffer = *bv_->buffer();
576 // get the pure distance
577 pos_type const end = row.endpos();
579 Paragraph const & par = text_->getPar(pit);
580 docstring const labelsep = from_utf8(par.layout()->labelsep);
581 int w = text_->leftMargin(buffer, max_width_, pit, row.pos());
582 int label_end = labelEnd(pit);
584 pos_type const body_pos = par.beginOfBody();
585 pos_type i = row.pos();
587 FontMetrics const & fm = theFontMetrics(text_->getLabelFont(buffer, par));
590 FontIterator fi = FontIterator(buffer, *text_, par, i);
591 for ( ; i < end; ++i, ++fi) {
592 if (body_pos > 0 && i == body_pos) {
593 w += fm.width(labelsep);
594 if (par.isLineSeparator(i - 1))
595 w -= text_->singleWidth(buffer, par, i - 1);
596 w = max(w, label_end);
598 char_type const c = par.getChar(i);
599 w += text_->singleWidth(par, i, c, *fi);
603 if (body_pos > 0 && body_pos >= end) {
604 w += fm.width(labelsep);
605 if (end > 0 && par.isLineSeparator(end - 1))
606 w -= text_->singleWidth(buffer, par, end - 1);
607 w = max(w, label_end);
610 row.width(w + right_margin);
614 void TextMetrics::setHeightOfRow(pit_type const pit,
617 Paragraph const & par = text_->getPar(pit);
618 // get the maximum ascent and the maximum descent
619 double layoutasc = 0;
620 double layoutdesc = 0;
621 double const dh = defaultRowHeight();
623 // ok, let us initialize the maxasc and maxdesc value.
624 // Only the fontsize count. The other properties
625 // are taken from the layoutfont. Nicer on the screen :)
626 Layout_ptr const & layout = par.layout();
628 // as max get the first character of this row then it can
629 // increase but not decrease the height. Just some point to
630 // start with so we don't have to do the assignment below too
632 Buffer const & buffer = *bv_->buffer();
633 Font font = text_->getFont(buffer, par, row.pos());
634 Font::FONT_SIZE const tmpsize = font.size();
635 font = text_->getLayoutFont(buffer, pit);
636 Font::FONT_SIZE const size = font.size();
637 font.setSize(tmpsize);
639 Font labelfont = text_->getLabelFont(buffer, par);
641 FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
642 FontMetrics const & fontmetrics = theFontMetrics(font);
644 // these are minimum values
645 double const spacing_val = layout->spacing.getValue()
646 * text_->spacing(buffer, par);
647 //lyxerr << "spacing_val = " << spacing_val << endl;
648 int maxasc = int(fontmetrics.maxAscent() * spacing_val);
649 int maxdesc = int(fontmetrics.maxDescent() * spacing_val);
651 // insets may be taller
652 InsetList::const_iterator ii = par.insetlist.begin();
653 InsetList::const_iterator iend = par.insetlist.end();
654 for ( ; ii != iend; ++ii) {
655 if (ii->pos >= row.pos() && ii->pos < row.endpos()) {
656 maxasc = max(maxasc, ii->inset->ascent());
657 maxdesc = max(maxdesc, ii->inset->descent());
661 // Check if any custom fonts are larger (Asger)
662 // This is not completely correct, but we can live with the small,
663 // cosmetic error for now.
665 pos_type const pos_end = row.endpos();
667 Font::FONT_SIZE maxsize =
668 par.highestFontInRange(row.pos(), pos_end, size);
669 if (maxsize > font.size()) {
670 font.setSize(maxsize);
671 maxasc = max(maxasc, fontmetrics.maxAscent());
672 maxdesc = max(maxdesc, fontmetrics.maxDescent());
675 // This is nicer with box insets:
680 ParagraphList const & pars = text_->paragraphs();
683 if (row.pos() == 0) {
684 BufferParams const & bufparams = buffer.params();
685 // some parskips VERY EASY IMPLEMENTATION
686 if (bufparams.paragraph_separation
687 == BufferParams::PARSEP_SKIP
688 && par.ownerCode() != Inset::ERT_CODE
689 && par.ownerCode() != Inset::LISTINGS_CODE
691 && ((layout->isParagraph() && par.getDepth() == 0)
692 || (pars[pit - 1].layout()->isParagraph()
693 && pars[pit - 1].getDepth() == 0)))
695 maxasc += bufparams.getDefSkip().inPixels(*bv_);
698 if (par.params().startOfAppendix())
699 maxasc += int(3 * dh);
701 // This is special code for the chapter, since the label of this
702 // layout is printed in an extra row
703 if (layout->counter == "chapter"
704 && !par.params().labelString().empty()) {
705 labeladdon = int(labelfont_metrics.maxHeight()
706 * layout->spacing.getValue()
707 * text_->spacing(buffer, par));
710 // special code for the top label
711 if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
712 || layout->labeltype == LABEL_BIBLIO
713 || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
714 && isFirstInSequence(pit, pars)
715 && !par.getLabelstring().empty())
718 labelfont_metrics.maxHeight()
719 * layout->spacing.getValue()
720 * text_->spacing(buffer, par)
721 + (layout->topsep + layout->labelbottomsep) * dh);
724 // Add the layout spaces, for example before and after
725 // a section, or between the items of a itemize or enumerate
728 pit_type prev = depthHook(pit, pars, par.getDepth());
729 Paragraph const & prevpar = pars[prev];
731 && prevpar.layout() == layout
732 && prevpar.getDepth() == par.getDepth()
733 && prevpar.getLabelWidthString()
734 == par.getLabelWidthString()) {
735 layoutasc = layout->itemsep * dh;
736 } else if (pit != 0 || row.pos() != 0) {
737 if (layout->topsep > 0)
738 layoutasc = layout->topsep * dh;
741 prev = outerHook(pit, pars);
742 if (prev != pit_type(pars.size())) {
743 maxasc += int(pars[prev].layout()->parsep * dh);
744 } else if (pit != 0) {
745 Paragraph const & prevpar = pars[pit - 1];
746 if (prevpar.getDepth() != 0 ||
747 prevpar.layout() == layout) {
748 maxasc += int(layout->parsep * dh);
753 // is it a bottom line?
754 if (row.endpos() >= par.size()) {
755 // add the layout spaces, for example before and after
756 // a section, or between the items of a itemize or enumerate
758 pit_type nextpit = pit + 1;
759 if (nextpit != pit_type(pars.size())) {
764 if (pars[cpit].getDepth() > pars[nextpit].getDepth()) {
765 usual = pars[cpit].layout()->bottomsep * dh;
766 cpit = depthHook(cpit, pars, pars[nextpit].getDepth());
767 if (pars[cpit].layout() != pars[nextpit].layout()
768 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
770 unusual = pars[cpit].layout()->bottomsep * dh;
772 layoutdesc = max(unusual, usual);
773 } else if (pars[cpit].getDepth() == pars[nextpit].getDepth()) {
774 if (pars[cpit].layout() != pars[nextpit].layout()
775 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
776 layoutdesc = int(pars[cpit].layout()->bottomsep * dh);
781 // incalculate the layout spaces
782 maxasc += int(layoutasc * 2 / (2 + pars[pit].getDepth()));
783 maxdesc += int(layoutdesc * 2 / (2 + pars[pit].getDepth()));
785 // FIXME: the correct way is to do the following is to move the
786 // following code in another method specially tailored for the
787 // main Text. The following test is thus bogus.
788 // Top and bottom margin of the document (only at top-level)
790 if (pit == 0 && row.pos() == 0)
792 if (pit + 1 == pit_type(pars.size()) &&
793 row.endpos() == par.size())
797 row.ascent(maxasc + labeladdon);
798 row.descent(maxdesc);
802 // x is an absolute screen coord
803 // returns the column near the specified x-coordinate of the row
804 // x is set to the real beginning of this column
805 pos_type TextMetrics::getColumnNearX(pit_type const pit,
806 Row const & row, int & x, bool & boundary) const
808 Buffer const & buffer = *bv_->buffer();
810 /// For the main Text, it is possible that this pit is not
811 /// yet in the CoordCache when moving cursor up.
812 /// x Paragraph coordinate is always 0 for main text anyway.
813 int const xo = main_text_? 0 : bv_->coordCache().get(text_, pit).x_;
815 RowMetrics const r = computeRowMetrics(pit, row);
816 Paragraph const & par = text_->getPar(pit);
818 pos_type vc = row.pos();
819 pos_type end = row.endpos();
821 Layout_ptr 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 frontend::FontMetrics const & fm
841 = theFontMetrics(text_->getLabelFont(buffer, par));
843 while (vc < end && tmpx <= x) {
844 c = text_->bidi.vis2log(vc);
846 if (body_pos > 0 && c == body_pos - 1) {
848 docstring const lsep = from_utf8(layout->labelsep);
849 tmpx += r.label_hfill + fm.width(lsep);
850 if (par.isLineSeparator(body_pos - 1))
851 tmpx -= text_->singleWidth(buffer, par, body_pos - 1);
854 if (par.hfillExpansion(row, c)) {
855 tmpx += text_->singleWidth(buffer, par, c);
859 tmpx += r.label_hfill;
860 } else if (par.isSeparator(c)) {
861 tmpx += text_->singleWidth(buffer, par, c);
865 tmpx += text_->singleWidth(buffer, par, 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 = text_->bidi.vis2log(vc);
891 if (text_->bidi.level(c) % 2 == 1)
894 c = text_->bidi.vis2log(vc - 1);
895 bool const rtl = (text_->bidi.level(c) % 2 == 1);
896 if (left_side == rtl) {
898 boundary = text_->bidi.isBoundary(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 (text_->bidi.level(end -1) % 2 == 0)
912 tmpx -= text_->singleWidth(buffer, par, end - 1);
914 tmpx += text_->singleWidth(buffer, par, 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 = parMetrics(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 Text::pos2x(pit_type pit, pos_type pos) const
958 // ParagraphMetrics const & pm = parMetrics(pit);
959 // Row const & r = pm.rows()[row];
965 int defaultRowHeight()
967 return int(theFontMetrics(Font(Font::ALL_SANE)).maxHeight() * 1.2);