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 if (z > 0 && par.isNewline(z - 1)) {
251 setRowWidth(right_margin, pit, row);
252 setHeightOfRow(pit, row);
253 pm.rows().push_back(row);
254 pm.dim().des += row.height();
257 pm.dim().asc += pm.rows()[0].ascent();
258 pm.dim().des -= pm.rows()[0].ascent();
260 // IMPORTANT NOTE: We pass 'false' explicitely in order to not call
261 // redoParagraph() recursively inside parMetrics.
262 Dimension old_dim = parMetrics(pit, false).dim();
264 changed |= old_dim.height() != pm.dim().height();
266 par_metrics_[pit] = pm;
268 // Update the row change statuses. The painter will need that info
269 // in order to know which row has to be repainted.
270 par_metrics_[pit].updateRowChangeStatus();
275 RowMetrics TextMetrics::computeRowMetrics(pit_type const pit,
276 Row const & row) const
279 Buffer & buffer = *bv_->buffer();
280 Paragraph const & par = text_->getPar(pit);
282 double w = dim_.wid - row.width();
284 bool const is_rtl = text_->isRTL(buffer, par);
286 result.x = rightMargin(pit);
288 result.x = text_->leftMargin(buffer, max_width_, pit, row.pos());
290 // is there a manual margin with a manual label
291 Layout_ptr const & layout = par.layout();
293 if (layout->margintype == MARGIN_MANUAL
294 && layout->labeltype == LABEL_MANUAL) {
295 /// We might have real hfills in the label part
296 int nlh = numberOfLabelHfills(par, row);
298 // A manual label par (e.g. List) has an auto-hfill
299 // between the label text and the body of the
301 // But we don't want to do this auto hfill if the par
306 if (nlh && !par.getLabelWidthString().empty())
307 result.label_hfill = labelFill(par, row) / double(nlh);
310 // are there any hfills in the row?
311 int const nh = numberOfHfills(par, row);
315 result.hfill = w / nh;
316 // we don't have to look at the alignment if it is ALIGN_LEFT and
317 // if the row is already larger then the permitted width as then
318 // we force the LEFT_ALIGN'edness!
319 } else if (int(row.width()) < max_width_) {
320 // is it block, flushleft or flushright?
321 // set x how you need it
323 if (par.params().align() == LYX_ALIGN_LAYOUT)
324 align = layout->align;
326 align = par.params().align();
328 // Display-style insets should always be on a centred row
329 // The test on par.size() is to catch zero-size pars, which
330 // would trigger the assert in Paragraph::getInset().
331 //inset = par.size() ? par.getInset(row.pos()) : 0;
332 if (row.pos() < par.size()
333 && par.isInset(row.pos()))
335 switch(par.getInset(row.pos())->display()) {
336 case Inset::AlignLeft:
337 align = LYX_ALIGN_BLOCK;
339 case Inset::AlignCenter:
340 align = LYX_ALIGN_CENTER;
342 // other types unchanged (use align)
347 case LYX_ALIGN_BLOCK: {
348 int const ns = numberOfSeparators(par, row);
349 bool disp_inset = false;
350 if (row.endpos() < par.size()) {
351 Inset const * in = par.getInset(row.endpos());
353 disp_inset = in->display();
355 // If we have separators, this is not the last row of a
356 // par, does not end in newline, and is not row above a
357 // display inset... then stretch it
359 && row.endpos() < par.size()
360 && !par.isNewline(row.endpos() - 1)
363 result.separator = w / ns;
369 case LYX_ALIGN_RIGHT:
372 case LYX_ALIGN_CENTER:
379 pos_type body_pos = par.beginOfBody();
380 pos_type end = row.endpos();
383 && (body_pos > end || !par.isLineSeparator(body_pos - 1)))
385 docstring const lsep = from_utf8(layout->labelsep);
386 result.x += theFontMetrics(text_->getLabelFont(buffer, par)).width(lsep);
388 result.x += result.label_hfill;
396 int TextMetrics::labelFill(Paragraph const & par, Row const & row) const
398 Buffer & buffer = *bv_->buffer();
400 pos_type last = par.beginOfBody();
401 BOOST_ASSERT(last > 0);
403 // -1 because a label ends with a space that is in the label
406 // a separator at this end does not count
407 if (par.isLineSeparator(last))
411 for (pos_type i = row.pos(); i <= last; ++i)
412 w += text_->singleWidth(buffer, par, i);
414 docstring const & label = par.params().labelWidthString();
418 FontMetrics const & fm
419 = theFontMetrics(text_->getLabelFont(buffer, par));
421 return max(0, fm.width(label) - w);
427 // this needs special handling - only newlines count as a break point
428 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
430 pos_type const end = par.size();
433 if (par.isNewline(i))
442 int TextMetrics::labelEnd(pit_type const pit) const
444 // labelEnd is only needed if the layout fills a flushleft label.
445 if (text_->getPar(pit).layout()->margintype != MARGIN_MANUAL)
447 // return the beginning of the body
448 return text_->leftMargin(*bv_->buffer(), max_width_, pit);
452 void TextMetrics::rowBreakPoint(int width, pit_type const pit,
455 Buffer & buffer = *bv_->buffer();
456 Paragraph const & par = text_->getPar(pit);
457 pos_type const end = par.size();
458 pos_type const pos = row.pos();
469 Layout_ptr const & layout = par.layout();
471 if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX) {
472 row.endpos(addressBreakPoint(pos, par));
476 pos_type const body_pos = par.beginOfBody();
479 // Now we iterate through until we reach the right margin
480 // or the end of the par, then choose the possible break
483 int label_end = labelEnd(pit);
484 int const left = text_->leftMargin(buffer, max_width_, pit, pos);
487 // pixel width since last breakpoint
490 FontIterator fi = FontIterator(buffer, *text_, par, pos);
491 pos_type point = end;
493 FontMetrics const & fm = theFontMetrics(text_->getLabelFont(buffer, par));
494 for ( ; i < end; ++i, ++fi) {
495 char_type const c = par.getChar(i);
496 int thiswidth = text_->singleWidth(par, i, c, *fi);
498 // add the auto-hfill from label end to the body
499 if (body_pos && i == body_pos) {
500 docstring lsep = from_utf8(layout->labelsep);
501 int add = fm.width(lsep);
502 if (par.isLineSeparator(i - 1))
503 add -= text_->singleWidth(buffer, par, i - 1);
505 add = std::max(add, label_end - x);
510 chunkwidth += thiswidth;
512 // break before a character that will fall off
513 // the right of the row
515 // if no break before, break here
516 if (point == end || chunkwidth >= width - left) {
523 // exit on last registered breakpoint:
527 if (par.isNewline(i)) {
533 if (par.isInset(i + 1) && par.getInset(i + 1)->display()) {
538 if (par.isInset(i) && par.getInset(i)->display()) {
544 if (!par.isInset(i) || par.getInset(i)->isChar()) {
545 // some insets are line separators too
546 if (par.isLineSeparator(i)) {
547 // register breakpoint:
554 // maybe found one, but the par is short enough.
555 if (i == end && x < width)
558 // manual labels cannot be broken in LaTeX. But we
559 // want to make our on-screen rendering of footnotes
561 if (body_pos && point < body_pos)
568 void TextMetrics::setRowWidth(int right_margin,
569 pit_type const pit, Row & row) const
571 Buffer & buffer = *bv_->buffer();
572 // get the pure distance
573 pos_type const end = row.endpos();
575 Paragraph const & par = text_->getPar(pit);
576 docstring const labelsep = from_utf8(par.layout()->labelsep);
577 int w = text_->leftMargin(buffer, max_width_, pit, row.pos());
578 int label_end = labelEnd(pit);
580 pos_type const body_pos = par.beginOfBody();
581 pos_type i = row.pos();
583 FontMetrics const & fm = theFontMetrics(text_->getLabelFont(buffer, par));
586 FontIterator fi = FontIterator(buffer, *text_, par, i);
587 for ( ; i < end; ++i, ++fi) {
588 if (body_pos > 0 && i == body_pos) {
589 w += fm.width(labelsep);
590 if (par.isLineSeparator(i - 1))
591 w -= text_->singleWidth(buffer, par, i - 1);
592 w = max(w, label_end);
594 char_type const c = par.getChar(i);
595 w += text_->singleWidth(par, i, c, *fi);
599 if (body_pos > 0 && body_pos >= end) {
600 w += fm.width(labelsep);
601 if (end > 0 && par.isLineSeparator(end - 1))
602 w -= text_->singleWidth(buffer, par, end - 1);
603 w = max(w, label_end);
606 row.width(w + right_margin);
610 void TextMetrics::setHeightOfRow(pit_type const pit,
613 Paragraph const & par = text_->getPar(pit);
614 // get the maximum ascent and the maximum descent
615 double layoutasc = 0;
616 double layoutdesc = 0;
617 double const dh = defaultRowHeight();
619 // ok, let us initialize the maxasc and maxdesc value.
620 // Only the fontsize count. The other properties
621 // are taken from the layoutfont. Nicer on the screen :)
622 Layout_ptr const & layout = par.layout();
624 // as max get the first character of this row then it can
625 // increase but not decrease the height. Just some point to
626 // start with so we don't have to do the assignment below too
628 Buffer const & buffer = *bv_->buffer();
629 Font font = text_->getFont(buffer, par, row.pos());
630 Font::FONT_SIZE const tmpsize = font.size();
631 font = text_->getLayoutFont(buffer, pit);
632 Font::FONT_SIZE const size = font.size();
633 font.setSize(tmpsize);
635 Font labelfont = text_->getLabelFont(buffer, par);
637 FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
638 FontMetrics const & fontmetrics = theFontMetrics(font);
640 // these are minimum values
641 double const spacing_val = layout->spacing.getValue()
642 * text_->spacing(buffer, par);
643 //lyxerr << "spacing_val = " << spacing_val << endl;
644 int maxasc = int(fontmetrics.maxAscent() * spacing_val);
645 int maxdesc = int(fontmetrics.maxDescent() * spacing_val);
647 // insets may be taller
648 InsetList::const_iterator ii = par.insetlist.begin();
649 InsetList::const_iterator iend = par.insetlist.end();
650 for ( ; ii != iend; ++ii) {
651 if (ii->pos >= row.pos() && ii->pos < row.endpos()) {
652 maxasc = max(maxasc, ii->inset->ascent());
653 maxdesc = max(maxdesc, ii->inset->descent());
657 // Check if any custom fonts are larger (Asger)
658 // This is not completely correct, but we can live with the small,
659 // cosmetic error for now.
661 pos_type const pos_end = row.endpos();
663 Font::FONT_SIZE maxsize =
664 par.highestFontInRange(row.pos(), pos_end, size);
665 if (maxsize > font.size()) {
666 // use standard paragraph font with the maximal size
668 maxfont.setSize(maxsize);
669 FontMetrics const & maxfontmetrics = theFontMetrics(maxfont);
670 maxasc = max(maxasc, maxfontmetrics.maxAscent());
671 maxdesc = max(maxdesc, maxfontmetrics.maxDescent());
674 // This is nicer with box insets:
679 ParagraphList const & pars = text_->paragraphs();
682 if (row.pos() == 0) {
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 || row.pos() != 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 (row.endpos() >= 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 && row.pos() == 0)
791 if (pit + 1 == pit_type(pars.size()) &&
792 row.endpos() == par.size() &&
793 !(row.endpos() > 0 && par.isNewline(row.endpos() - 1)))
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 bidi.computeTables(par, buffer, row);
820 pos_type vc = row.pos();
821 pos_type end = row.endpos();
823 Layout_ptr const & layout = par.layout();
825 bool left_side = false;
827 pos_type body_pos = par.beginOfBody();
830 double last_tmpx = tmpx;
833 (body_pos > end || !par.isLineSeparator(body_pos - 1)))
836 // check for empty row
842 frontend::FontMetrics const & fm
843 = theFontMetrics(text_->getLabelFont(buffer, par));
845 while (vc < end && tmpx <= x) {
846 c = bidi.vis2log(vc);
848 if (body_pos > 0 && c == body_pos - 1) {
850 docstring const lsep = from_utf8(layout->labelsep);
851 tmpx += r.label_hfill + fm.width(lsep);
852 if (par.isLineSeparator(body_pos - 1))
853 tmpx -= text_->singleWidth(buffer, par, body_pos - 1);
856 if (par.hfillExpansion(row, c)) {
857 tmpx += text_->singleWidth(buffer, par, c);
861 tmpx += r.label_hfill;
862 } else if (par.isSeparator(c)) {
863 tmpx += text_->singleWidth(buffer, par, c);
867 tmpx += text_->singleWidth(buffer, par, c);
872 if ((tmpx + last_tmpx) / 2 > x) {
877 BOOST_ASSERT(vc <= end); // This shouldn't happen.
880 // This (rtl_support test) is not needed, but gives
881 // some speedup if rtl_support == false
882 bool const lastrow = lyxrc.rtl_support && row.endpos() == par.size();
884 // If lastrow is false, we don't need to compute
886 bool const rtl = lastrow ? text_->isRTL(buffer, par) : false;
888 ((rtl && left_side && vc == row.pos() && x < tmpx - 5) ||
889 (!rtl && !left_side && vc == end && x > tmpx + 5)))
891 else if (vc == row.pos()) {
892 c = bidi.vis2log(vc);
893 if (bidi.level(c) % 2 == 1)
896 c = bidi.vis2log(vc - 1);
897 bool const rtl = (bidi.level(c) % 2 == 1);
898 if (left_side == rtl) {
900 boundary = text_->isRTLBoundary(buffer, par, c);
904 // I believe this code is not needed anymore (Jug 20050717)
906 // The following code is necessary because the cursor position past
907 // the last char in a row is logically equivalent to that before
908 // the first char in the next row. That's why insets causing row
909 // divisions -- Newline and display-style insets -- must be treated
910 // specially, so cursor up/down doesn't get stuck in an air gap -- MV
911 // Newline inset, air gap below:
912 if (row.pos() < end && c >= end && par.isNewline(end - 1)) {
913 if (bidi.level(end -1) % 2 == 0)
914 tmpx -= text_->singleWidth(buffer, par, end - 1);
916 tmpx += text_->singleWidth(buffer, par, end - 1);
920 // Air gap above display inset:
921 if (row.pos() < end && c >= end && end < par.size()
922 && par.isInset(end) && par.getInset(end)->display()) {
925 // Air gap below display inset:
926 if (row.pos() < end && c >= end && par.isInset(end - 1)
927 && par.getInset(end - 1)->display()) {
933 pos_type const col = c - row.pos();
935 if (!c || end == par.size())
938 if (c==end && !par.isLineSeparator(c-1) && !par.isNewline(c-1)) {
943 return min(col, end - 1 - row.pos());
947 pos_type TextMetrics::x2pos(pit_type pit, int row, int x) const
949 ParagraphMetrics const & pm = parMetrics(pit);
950 BOOST_ASSERT(!pm.rows().empty());
951 BOOST_ASSERT(row < int(pm.rows().size()));
953 Row const & r = pm.rows()[row];
954 return r.pos() + getColumnNearX(pit, r, x, bound);
958 //int Text::pos2x(pit_type pit, pos_type pos) const
960 // ParagraphMetrics const & pm = parMetrics(pit);
961 // Row const & r = pm.rows()[row];
967 int defaultRowHeight()
969 return int(theFontMetrics(Font(Font::ALL_SANE)).maxHeight() * 1.2);