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 "bufferview_funcs.h"
27 #include "CoordCache.h"
29 #include "FontIterator.h"
30 #include "FuncRequest.h"
33 #include "MetricsInfo.h"
34 #include "paragraph_funcs.h"
35 #include "ParagraphParameters.h"
36 #include "ParIterator.h"
37 #include "rowpainter.h"
41 #include "frontends/FontMetrics.h"
42 #include "frontends/Painter.h"
44 #include <boost/current_function.hpp>
52 using frontend::FontMetrics;
56 int numberOfSeparators(Paragraph const & par, Row const & row)
58 pos_type const first = max(row.pos(), par.beginOfBody());
59 pos_type const last = row.endpos() - 1;
61 for (pos_type p = first; p < last; ++p) {
62 if (par.isSeparator(p))
69 int numberOfLabelHfills(Paragraph const & par, Row const & row)
71 pos_type last = row.endpos() - 1;
72 pos_type first = row.pos();
74 // hfill *DO* count at the beginning of paragraphs!
76 while (first < last && par.isHfill(first))
80 last = min(last, par.beginOfBody());
82 for (pos_type p = first; p < last; ++p) {
90 int numberOfHfills(Paragraph const & par, Row const & row)
92 pos_type const last = row.endpos();
93 pos_type first = row.pos();
95 // hfill *DO* count at the beginning of paragraphs!
97 while (first < last && par.isHfill(first))
101 first = max(first, par.beginOfBody());
104 for (pos_type p = first; p < last; ++p) {
113 TextMetrics::TextMetrics(BufferView * bv, Text * text)
114 : bv_(bv), text_(text)
117 max_width_ = bv_->workWidth();
118 dim_.wid = max_width_;
122 //text_->updateLabels(bv->buffer());
126 ParagraphMetrics const & TextMetrics::parMetrics(pit_type pit) const
128 return const_cast<TextMetrics *>(this)->parMetrics(pit, true);
132 ParagraphMetrics & TextMetrics::parMetrics(pit_type pit,
135 ParMetricsCache::iterator pmc_it = par_metrics_.find(pit);
136 if (pmc_it == par_metrics_.end()) {
137 pmc_it = par_metrics_.insert(
138 std::make_pair(pit, ParagraphMetrics(text_->getPar(pit)))).first;
140 if (pmc_it->second.rows().empty() && redo) {
143 return pmc_it->second;
147 bool TextMetrics::metrics(MetricsInfo & mi, Dimension & dim)
149 BOOST_ASSERT(mi.base.textwidth);
150 max_width_ = mi.base.textwidth;
151 // backup old dimension.
152 Dimension const old_dim = dim_;
155 size_t npar = text_->paragraphs().size();
157 // If there is more than one row, expand the text to
158 // the full allowable width.
159 dim_.wid = max_width_;
161 //lyxerr << "Text::metrics: width: " << mi.base.textwidth
162 // << " maxWidth: " << max_width_ << "\nfont: " << mi.base.font << endl;
164 bool changed = false;
166 for (pit_type pit = 0; pit != npar; ++pit) {
167 changed |= redoParagraph(pit);
168 ParagraphMetrics const & pm = par_metrics_[pit];
170 if (dim_.wid < pm.width())
171 dim_.wid = pm.width();
174 dim_.asc = par_metrics_[0].ascent();
175 dim_.des = h - dim_.asc;
176 //lyxerr << "dim_.wid " << dim_.wid << endl;
177 //lyxerr << "dim_.asc " << dim_.asc << endl;
178 //lyxerr << "dim_.des " << dim_.des << endl;
180 changed |= dim_ != old_dim;
186 int TextMetrics::rightMargin(ParagraphMetrics const & pm) const
188 return main_text_? pm.rightMargin(bv_->buffer()) : 0;
192 int TextMetrics::rightMargin(pit_type const pit) const
194 return main_text_? par_metrics_[pit].rightMargin(bv_->buffer()) : 0;
198 bool TextMetrics::redoParagraph(pit_type const pit)
200 Paragraph & par = text_->getPar(pit);
201 // IMPORTANT NOTE: We pass 'false' explicitely in order to not call
202 // redoParagraph() recursively inside parMetrics.
203 Dimension old_dim = parMetrics(pit, false).dim();
204 ParagraphMetrics & pm = par_metrics_[pit];
207 Buffer & buffer = bv_->buffer();
208 BufferParams const & bparams = buffer.params();
209 main_text_ = (text_ == &buffer.text());
210 bool changed = false;
212 // FIXME This check ought to be done somewhere else. It is the reason
213 // why text_ is not const. But then, where else to do it?
214 // Well, how can you end up with either (a) a biblio environment that
215 // has no InsetBibitem or (b) a biblio environment with more than one
216 // InsetBibitem? I think the answer is: when paragraphs are merged;
217 // when layout is set; when material is pasted.
218 int const moveCursor = par.checkBiblio(buffer.params().trackChanges);
220 const_cast<Cursor &>(bv_->cursor()).posRight();
221 else if (moveCursor < 0) {
222 Cursor & cursor = const_cast<Cursor &>(bv_->cursor());
223 if (cursor.pos() >= -moveCursor)
227 // Optimisation: this is used in the next two loops
228 // so better to calculate that once here.
229 int const right_margin = rightMargin(pm);
232 // FIXME: We should always use getFont(), see documentation of
233 // noFontChange() in Inset.h.
234 Font const bufferfont = buffer.params().getFont();
235 InsetList::const_iterator ii = par.insetlist.begin();
236 InsetList::const_iterator iend = par.insetlist.end();
237 for (; ii != iend; ++ii) {
238 Dimension old_dim = ii->inset->dimension();
240 int const w = max_width_ - text_->leftMargin(buffer, max_width_, pit, ii->pos)
242 Font const & font = ii->inset->noFontChange() ?
243 bufferfont : text_->getFont(buffer, par, ii->pos);
244 MetricsInfo mi(bv_, font, w);
245 changed |= ii->inset->metrics(mi, dim);
246 changed |= (old_dim != dim);
249 par.setBeginOfBody();
251 size_t row_index = 0;
252 // maximum pixel width of a row
253 int width = max_width_ - right_margin; // - leftMargin(buffer, max_width_, pit, row);
256 pos_type end = rowBreakPoint(width, pit, first);
257 if (row_index || end < par.size())
258 // If there is more than one row, expand the text to
259 // the full allowable width. This setting here is needed
260 // for the computeRowMetrics below().
261 dim_.wid = max_width_;
263 dim.wid = rowWidth(right_margin, pit, first, end);
264 boost::tie(dim.asc, dim.des) = rowHeight(pit, first, end);
265 if (row_index == pm.rows().size())
266 pm.rows().push_back(Row());
267 Row & row = pm.rows()[row_index];
268 row.setChanged(false);
271 row.setDimension(dim);
272 computeRowMetrics(pit, row);
273 pm.computeRowSignature(row, bparams);
277 pm.dim().wid = std::max(pm.dim().wid, dim.wid);
278 pm.dim().des += dim.height();
279 } while (first < par.size());
281 if (row_index < pm.rows().size())
282 pm.rows().resize(row_index);
284 // Make sure that if a par ends in newline, there is one more row
286 if (first > 0 && par.isNewline(first - 1)) {
288 dim.wid = rowWidth(right_margin, pit, first, first);
289 boost::tie(dim.asc, dim.des) = rowHeight(pit, first, first);
290 if (row_index == pm.rows().size())
291 pm.rows().push_back(Row());
292 Row & row = pm.rows()[row_index];
293 row.setChanged(false);
296 row.setDimension(dim);
297 computeRowMetrics(pit, row);
298 pm.computeRowSignature(row, bparams);
299 pm.dim().des += dim.height();
302 pm.dim().asc += pm.rows()[0].ascent();
303 pm.dim().des -= pm.rows()[0].ascent();
305 changed |= old_dim.height() != pm.dim().height();
311 void TextMetrics::computeRowMetrics(pit_type const pit,
319 Buffer & buffer = bv_->buffer();
320 Paragraph const & par = text_->getPar(pit);
322 double w = dim_.wid - row.width();
323 // FIXME: put back this assertion when the crash on new doc is solved.
324 //BOOST_ASSERT(w >= 0);
326 //lyxerr << "\ndim_.wid " << dim_.wid << endl;
327 //lyxerr << "row.width() " << row.width() << endl;
328 //lyxerr << "w " << w << endl;
330 bool const is_rtl = text_->isRTL(buffer, par);
332 row.x = rightMargin(pit);
334 row.x = text_->leftMargin(buffer, max_width_, pit, row.pos());
336 // is there a manual margin with a manual label
337 LayoutPtr const & layout = par.layout();
339 if (layout->margintype == MARGIN_MANUAL
340 && layout->labeltype == LABEL_MANUAL) {
341 /// We might have real hfills in the label part
342 int nlh = numberOfLabelHfills(par, row);
344 // A manual label par (e.g. List) has an auto-hfill
345 // between the label text and the body of the
347 // But we don't want to do this auto hfill if the par
352 if (nlh && !par.getLabelWidthString().empty())
353 row.label_hfill = labelFill(pit, row) / double(nlh);
356 // are there any hfills in the row?
357 int const nh = numberOfHfills(par, row);
362 // we don't have to look at the alignment if it is ALIGN_LEFT and
363 // if the row is already larger then the permitted width as then
364 // we force the LEFT_ALIGN'edness!
365 } else if (int(row.width()) < max_width_) {
366 // is it block, flushleft or flushright?
367 // set x how you need it
369 if (par.params().align() == LYX_ALIGN_LAYOUT)
370 align = layout->align;
372 align = par.params().align();
374 // Display-style insets should always be on a centred row
375 // The test on par.size() is to catch zero-size pars, which
376 // would trigger the assert in Paragraph::getInset().
377 //inset = par.size() ? par.getInset(row.pos()) : 0;
378 if (row.pos() < par.size()
379 && par.isInset(row.pos()))
381 switch(par.getInset(row.pos())->display()) {
382 case Inset::AlignLeft:
383 align = LYX_ALIGN_BLOCK;
385 case Inset::AlignCenter:
386 align = LYX_ALIGN_CENTER;
389 case Inset::AlignRight:
390 // unchanged (use align)
396 case LYX_ALIGN_BLOCK: {
397 int const ns = numberOfSeparators(par, row);
398 bool disp_inset = false;
399 if (row.endpos() < par.size()) {
400 Inset const * in = par.getInset(row.endpos());
402 disp_inset = in->display();
404 // If we have separators, this is not the last row of a
405 // par, does not end in newline, and is not row above a
406 // display inset... then stretch it
408 && row.endpos() < par.size()
409 && !par.isNewline(row.endpos() - 1)
412 row.separator = w / ns;
413 //lyxerr << "row.separator " << row.separator << endl;
414 //lyxerr << "ns " << ns << endl;
420 case LYX_ALIGN_RIGHT:
423 case LYX_ALIGN_CENTER:
430 pos_type body_pos = par.beginOfBody();
431 pos_type end = row.endpos();
434 && (body_pos > end || !par.isLineSeparator(body_pos - 1)))
436 row.x += theFontMetrics(text_->getLabelFont(buffer, par)).
437 width(layout->labelsep);
439 row.x += row.label_hfill;
445 int TextMetrics::labelFill(pit_type const pit, Row const & row) const
447 Buffer & buffer = bv_->buffer();
448 Paragraph const & par = text_->getPar(pit);
450 pos_type last = par.beginOfBody();
451 BOOST_ASSERT(last > 0);
453 // -1 because a label ends with a space that is in the label
456 // a separator at this end does not count
457 if (par.isLineSeparator(last))
461 for (pos_type i = row.pos(); i <= last; ++i)
462 w += singleWidth(pit, i);
464 docstring const & label = par.params().labelWidthString();
468 FontMetrics const & fm
469 = theFontMetrics(text_->getLabelFont(buffer, par));
471 return max(0, fm.width(label) - w);
477 // this needs special handling - only newlines count as a break point
478 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
480 pos_type const end = par.size();
483 if (par.isNewline(i))
492 int TextMetrics::labelEnd(pit_type const pit) const
494 // labelEnd is only needed if the layout fills a flushleft label.
495 if (text_->getPar(pit).layout()->margintype != MARGIN_MANUAL)
497 // return the beginning of the body
498 return text_->leftMargin(bv_->buffer(), max_width_, pit);
502 pit_type TextMetrics::rowBreakPoint(int width, pit_type const pit,
505 Buffer & buffer = bv_->buffer();
506 ParagraphMetrics const & pm = par_metrics_[pit];
507 Paragraph const & par = text_->getPar(pit);
508 pos_type const end = par.size();
509 if (pos == end || width < 0)
512 LayoutPtr const & layout = par.layout();
514 if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX)
515 return addressBreakPoint(pos, par);
517 pos_type const body_pos = par.beginOfBody();
520 // Now we iterate through until we reach the right margin
521 // or the end of the par, then choose the possible break
524 int label_end = labelEnd(pit);
525 int const left = text_->leftMargin(buffer, max_width_, pit, pos);
528 // pixel width since last breakpoint
531 FontIterator fi = FontIterator(buffer, *text_, par, pos);
532 pos_type point = end;
534 for ( ; i < end; ++i, ++fi) {
535 int thiswidth = pm.singleWidth(i, *fi);
537 // add the auto-hfill from label end to the body
538 if (body_pos && i == body_pos) {
539 FontMetrics const & fm = theFontMetrics(
540 text_->getLabelFont(buffer, par));
541 int add = fm.width(layout->labelsep);
542 if (par.isLineSeparator(i - 1))
543 add -= singleWidth(pit, i - 1);
545 add = std::max(add, label_end - x);
550 chunkwidth += thiswidth;
552 // break before a character that will fall off
553 // the right of the row
555 // if no break before, break here
556 if (point == end || chunkwidth >= width - left) {
563 // exit on last registered breakpoint:
567 if (par.isNewline(i)) {
573 if (par.isInset(i + 1) && par.getInset(i + 1)->display()) {
578 if (par.isInset(i) && par.getInset(i)->display()) {
584 if (!par.isInset(i) || par.getInset(i)->isChar()) {
585 // some insets are line separators too
586 if (par.isLineSeparator(i)) {
587 // register breakpoint:
594 // maybe found one, but the par is short enough.
595 if (i == end && x < width)
598 // manual labels cannot be broken in LaTeX. But we
599 // want to make our on-screen rendering of footnotes
601 if (body_pos && point < body_pos)
608 int TextMetrics::rowWidth(int right_margin, pit_type const pit,
609 pos_type const first, pos_type const end) const
611 Buffer & buffer = bv_->buffer();
612 // get the pure distance
613 ParagraphMetrics const & pm = par_metrics_[pit];
614 Paragraph const & par = text_->getPar(pit);
615 int w = text_->leftMargin(buffer, max_width_, pit, first);
616 int label_end = labelEnd(pit);
618 pos_type const body_pos = par.beginOfBody();
622 FontIterator fi = FontIterator(buffer, *text_, par, i);
623 for ( ; i < end; ++i, ++fi) {
624 if (body_pos > 0 && i == body_pos) {
625 FontMetrics const & fm = theFontMetrics(
626 text_->getLabelFont(buffer, par));
627 w += fm.width(par.layout()->labelsep);
628 if (par.isLineSeparator(i - 1))
629 w -= singleWidth(pit, i - 1);
630 w = max(w, label_end);
632 w += pm.singleWidth(i, *fi);
636 if (body_pos > 0 && body_pos >= end) {
637 FontMetrics const & fm = theFontMetrics(
638 text_->getLabelFont(buffer, par));
639 w += fm.width(par.layout()->labelsep);
640 if (end > 0 && par.isLineSeparator(end - 1))
641 w -= singleWidth(pit, end - 1);
642 w = max(w, label_end);
645 return w + right_margin;
649 boost::tuple<int, int> TextMetrics::rowHeight(pit_type const pit, pos_type const first,
650 pos_type const end) const
652 Paragraph const & par = text_->getPar(pit);
653 // get the maximum ascent and the maximum descent
654 double layoutasc = 0;
655 double layoutdesc = 0;
656 double const dh = defaultRowHeight();
658 // ok, let us initialize the maxasc and maxdesc value.
659 // Only the fontsize count. The other properties
660 // are taken from the layoutfont. Nicer on the screen :)
661 LayoutPtr const & layout = par.layout();
663 // as max get the first character of this row then it can
664 // increase but not decrease the height. Just some point to
665 // start with so we don't have to do the assignment below too
667 Buffer const & buffer = bv_->buffer();
668 Font font = text_->getFont(buffer, par, first);
669 Font::FONT_SIZE const tmpsize = font.size();
670 font = text_->getLayoutFont(buffer, pit);
671 Font::FONT_SIZE const size = font.size();
672 font.setSize(tmpsize);
674 Font labelfont = text_->getLabelFont(buffer, par);
676 FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
677 FontMetrics const & fontmetrics = theFontMetrics(font);
679 // these are minimum values
680 double const spacing_val = layout->spacing.getValue()
681 * text_->spacing(buffer, par);
682 //lyxerr << "spacing_val = " << spacing_val << endl;
683 int maxasc = int(fontmetrics.maxAscent() * spacing_val);
684 int maxdesc = int(fontmetrics.maxDescent() * spacing_val);
686 // insets may be taller
687 InsetList::const_iterator ii = par.insetlist.begin();
688 InsetList::const_iterator iend = par.insetlist.end();
689 for ( ; ii != iend; ++ii) {
690 if (ii->pos >= first && ii->pos < end) {
691 maxasc = max(maxasc, ii->inset->ascent());
692 maxdesc = max(maxdesc, ii->inset->descent());
696 // Check if any custom fonts are larger (Asger)
697 // This is not completely correct, but we can live with the small,
698 // cosmetic error for now.
701 Font::FONT_SIZE maxsize =
702 par.highestFontInRange(first, end, size);
703 if (maxsize > font.size()) {
704 // use standard paragraph font with the maximal size
706 maxfont.setSize(maxsize);
707 FontMetrics const & maxfontmetrics = theFontMetrics(maxfont);
708 maxasc = max(maxasc, maxfontmetrics.maxAscent());
709 maxdesc = max(maxdesc, maxfontmetrics.maxDescent());
712 // This is nicer with box insets:
716 ParagraphList const & pars = text_->paragraphs();
720 BufferParams const & bufparams = buffer.params();
721 // some parskips VERY EASY IMPLEMENTATION
722 if (bufparams.paragraph_separation
723 == BufferParams::PARSEP_SKIP
724 && par.ownerCode() != Inset::ERT_CODE
725 && par.ownerCode() != Inset::LISTINGS_CODE
727 && ((layout->isParagraph() && par.getDepth() == 0)
728 || (pars[pit - 1].layout()->isParagraph()
729 && pars[pit - 1].getDepth() == 0)))
731 maxasc += bufparams.getDefSkip().inPixels(*bv_);
734 if (par.params().startOfAppendix())
735 maxasc += int(3 * dh);
737 // This is special code for the chapter, since the label of this
738 // layout is printed in an extra row
739 if (layout->counter == "chapter"
740 && !par.params().labelString().empty()) {
741 labeladdon = int(labelfont_metrics.maxHeight()
742 * layout->spacing.getValue()
743 * text_->spacing(buffer, par));
746 // special code for the top label
747 if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
748 || layout->labeltype == LABEL_BIBLIO
749 || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
750 && isFirstInSequence(pit, pars)
751 && !par.getLabelstring().empty())
754 labelfont_metrics.maxHeight()
755 * layout->spacing.getValue()
756 * text_->spacing(buffer, par)
757 + (layout->topsep + layout->labelbottomsep) * dh);
760 // Add the layout spaces, for example before and after
761 // a section, or between the items of a itemize or enumerate
764 pit_type prev = depthHook(pit, pars, par.getDepth());
765 Paragraph const & prevpar = pars[prev];
767 && prevpar.layout() == layout
768 && prevpar.getDepth() == par.getDepth()
769 && prevpar.getLabelWidthString()
770 == par.getLabelWidthString()) {
771 layoutasc = layout->itemsep * dh;
772 } else if (pit != 0 || first != 0) {
773 if (layout->topsep > 0)
774 layoutasc = layout->topsep * dh;
777 prev = outerHook(pit, pars);
778 if (prev != pit_type(pars.size())) {
779 maxasc += int(pars[prev].layout()->parsep * dh);
780 } else if (pit != 0) {
781 Paragraph const & prevpar = pars[pit - 1];
782 if (prevpar.getDepth() != 0 ||
783 prevpar.layout() == layout) {
784 maxasc += int(layout->parsep * dh);
789 // is it a bottom line?
790 if (end >= par.size()) {
791 // add the layout spaces, for example before and after
792 // a section, or between the items of a itemize or enumerate
794 pit_type nextpit = pit + 1;
795 if (nextpit != pit_type(pars.size())) {
800 if (pars[cpit].getDepth() > pars[nextpit].getDepth()) {
801 usual = pars[cpit].layout()->bottomsep * dh;
802 cpit = depthHook(cpit, pars, pars[nextpit].getDepth());
803 if (pars[cpit].layout() != pars[nextpit].layout()
804 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
806 unusual = pars[cpit].layout()->bottomsep * dh;
808 layoutdesc = max(unusual, usual);
809 } else if (pars[cpit].getDepth() == pars[nextpit].getDepth()) {
810 if (pars[cpit].layout() != pars[nextpit].layout()
811 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
812 layoutdesc = int(pars[cpit].layout()->bottomsep * dh);
817 // incalculate the layout spaces
818 maxasc += int(layoutasc * 2 / (2 + pars[pit].getDepth()));
819 maxdesc += int(layoutdesc * 2 / (2 + pars[pit].getDepth()));
821 // FIXME: the correct way is to do the following is to move the
822 // following code in another method specially tailored for the
823 // main Text. The following test is thus bogus.
824 // Top and bottom margin of the document (only at top-level)
826 if (pit == 0 && first == 0)
828 if (pit + 1 == pit_type(pars.size()) &&
830 !(end > 0 && par.isNewline(end - 1)))
834 return boost::make_tuple(maxasc + labeladdon, maxdesc);
838 // x is an absolute screen coord
839 // returns the column near the specified x-coordinate of the row
840 // x is set to the real beginning of this column
841 pos_type TextMetrics::getColumnNearX(pit_type const pit,
842 Row const & row, int & x, bool & boundary) const
844 Buffer const & buffer = bv_->buffer();
846 /// For the main Text, it is possible that this pit is not
847 /// yet in the CoordCache when moving cursor up.
848 /// x Paragraph coordinate is always 0 for main text anyway.
849 int const xo = main_text_? 0 : bv_->coordCache().get(text_, pit).x_;
851 Paragraph const & par = text_->getPar(pit);
852 ParagraphMetrics const & pm = par_metrics_[pit];
854 bidi.computeTables(par, buffer, row);
856 pos_type vc = row.pos();
857 pos_type end = row.endpos();
859 LayoutPtr const & layout = par.layout();
861 bool left_side = false;
863 pos_type body_pos = par.beginOfBody();
866 double last_tmpx = tmpx;
869 (body_pos > end || !par.isLineSeparator(body_pos - 1)))
872 // check for empty row
878 while (vc < end && tmpx <= x) {
879 c = bidi.vis2log(vc);
881 if (body_pos > 0 && c == body_pos - 1) {
882 FontMetrics const & fm = theFontMetrics(
883 text_->getLabelFont(buffer, par));
884 tmpx += row.label_hfill + fm.width(layout->labelsep);
885 if (par.isLineSeparator(body_pos - 1))
886 tmpx -= singleWidth(pit, body_pos - 1);
889 if (pm.hfillExpansion(row, c)) {
890 tmpx += singleWidth(pit, c);
894 tmpx += row.label_hfill;
895 } else if (par.isSeparator(c)) {
896 tmpx += singleWidth(pit, c);
898 tmpx += row.separator;
900 tmpx += singleWidth(pit, c);
905 if ((tmpx + last_tmpx) / 2 > x) {
910 BOOST_ASSERT(vc <= end); // This shouldn't happen.
913 // This (rtl_support test) is not needed, but gives
914 // some speedup if rtl_support == false
915 bool const lastrow = lyxrc.rtl_support && row.endpos() == par.size();
917 // If lastrow is false, we don't need to compute
919 bool const rtl = lastrow ? text_->isRTL(buffer, par) : false;
921 ((rtl && left_side && vc == row.pos() && x < tmpx - 5) ||
922 (!rtl && !left_side && vc == end && x > tmpx + 5)))
924 else if (vc == row.pos()) {
925 c = bidi.vis2log(vc);
926 if (bidi.level(c) % 2 == 1)
929 c = bidi.vis2log(vc - 1);
930 bool const rtl = (bidi.level(c) % 2 == 1);
931 if (left_side == rtl) {
933 boundary = text_->isRTLBoundary(buffer, par, c);
937 // I believe this code is not needed anymore (Jug 20050717)
939 // The following code is necessary because the cursor position past
940 // the last char in a row is logically equivalent to that before
941 // the first char in the next row. That's why insets causing row
942 // divisions -- Newline and display-style insets -- must be treated
943 // specially, so cursor up/down doesn't get stuck in an air gap -- MV
944 // Newline inset, air gap below:
945 if (row.pos() < end && c >= end && par.isNewline(end - 1)) {
946 if (bidi.level(end -1) % 2 == 0)
947 tmpx -= singleWidth(pit, end - 1);
949 tmpx += singleWidth(pit, end - 1);
953 // Air gap above display inset:
954 if (row.pos() < end && c >= end && end < par.size()
955 && par.isInset(end) && par.getInset(end)->display()) {
958 // Air gap below display inset:
959 if (row.pos() < end && c >= end && par.isInset(end - 1)
960 && par.getInset(end - 1)->display()) {
966 pos_type const col = c - row.pos();
968 if (!c || end == par.size())
971 if (c==end && !par.isLineSeparator(c-1) && !par.isNewline(c-1)) {
976 return min(col, end - 1 - row.pos());
980 pos_type TextMetrics::x2pos(pit_type pit, int row, int x) const
982 ParagraphMetrics const & pm = par_metrics_[pit];
983 BOOST_ASSERT(!pm.rows().empty());
984 BOOST_ASSERT(row < int(pm.rows().size()));
986 Row const & r = pm.rows()[row];
987 return r.pos() + getColumnNearX(pit, r, x, bound);
991 int TextMetrics::singleWidth(pit_type pit, pos_type pos) const
993 Buffer const & buffer = bv_->buffer();
994 ParagraphMetrics const & pm = par_metrics_[pit];
996 return pm.singleWidth(pos, text_->getFont(buffer, text_->getPar(pit), pos));
1000 // only used for inset right now. should also be used for main text
1001 void TextMetrics::draw(PainterInfo & pi, int x, int y) const
1003 if (par_metrics_.empty())
1006 ParMetricsCache::const_iterator it = par_metrics_.begin();
1007 ParMetricsCache::const_iterator const end = par_metrics_.end();
1008 y -= it->second.ascent();
1009 for (; it != end; ++it) {
1010 ParagraphMetrics const & pmi = it->second;
1012 drawParagraph(pi, it->first, x, y);
1018 void TextMetrics::drawParagraph(PainterInfo & pi, pit_type pit, int x, int y) const
1020 // lyxerr << " paintPar: pit: " << pit << " at y: " << y << endl;
1021 int const ww = bv_->workHeight();
1023 bv_->coordCache().parPos()[text_][pit] = Point(x, y);
1025 ParagraphMetrics const & pm = par_metrics_[pit];
1026 if (pm.rows().empty())
1029 RowList::const_iterator const rb = pm.rows().begin();
1030 RowList::const_iterator const re = pm.rows().end();
1035 for (RowList::const_iterator rit = rb; rit != re; ++rit) {
1038 bool const inside = (y + rit->descent() >= 0
1039 && y - rit->ascent() < ww);
1040 // it is not needed to draw on screen if we are not inside.
1041 pi.pain.setDrawingEnabled(inside);
1042 RowPainter rp(pi, *text_, pit, *rit, bidi, x, y);
1044 // Row signature; has row changed since last paint?
1045 bool row_has_changed = rit->changed();
1047 if (!pi.full_repaint && !row_has_changed) {
1048 // Paint the only the insets if the text itself is
1050 rp.paintOnlyInsets();
1051 y += rit->descent();
1055 // Paint the row if a full repaint has been requested or it has
1057 // Clear background of this row
1058 // (if paragraph background was not cleared)
1059 if (!pi.full_repaint && row_has_changed) {
1060 pi.pain.fillRectangle(x, y - rit->ascent(),
1061 width(), rit->height(),
1062 text_->backgroundColor());
1065 // Instrumentation for testing row cache (see also
1067 if (lyxerr.debugging(Debug::PAINTING)) {
1068 if (text_->isMainText(bv_->buffer()))
1069 LYXERR(Debug::PAINTING) << "\n{" <<
1070 pi.full_repaint << row_has_changed << "}";
1072 LYXERR(Debug::PAINTING) << "[" <<
1073 pi.full_repaint << row_has_changed << "]";
1076 // Backup full_repaint status and force full repaint
1077 // for inner insets as the Row has been cleared out.
1078 bool tmp = pi.full_repaint;
1079 pi.full_repaint = true;
1082 rp.paintChangeBar();
1088 y += rit->descent();
1089 // Restore full_repaint status.
1090 pi.full_repaint = tmp;
1092 // Re-enable screen drawing for future use of the painter.
1093 pi.pain.setDrawingEnabled(true);
1095 //LYXERR(Debug::PAINTING) << "." << endl;
1099 // only used for inset right now. should also be used for main text
1100 void TextMetrics::drawSelection(PainterInfo & pi, int x, int) const
1102 Cursor & cur = bv_->cursor();
1103 if (!cur.selection())
1105 if (!ptr_cmp(cur.text(), text_))
1108 LYXERR(Debug::DEBUG)
1109 << BOOST_CURRENT_FUNCTION
1110 << "draw selection at " << x
1113 DocIterator beg = cur.selectionBegin();
1114 DocIterator end = cur.selectionEnd();
1116 // the selection doesn't touch the visible screen?
1117 if (bv_funcs::status(bv_, beg) == bv_funcs::CUR_BELOW
1118 || bv_funcs::status(bv_, end) == bv_funcs::CUR_ABOVE)
1121 ParagraphMetrics const & pm1 = par_metrics_[beg.pit()];
1122 ParagraphMetrics const & pm2 = par_metrics_[end.pit()];
1123 Row const & row1 = pm1.getRow(beg.pos(), beg.boundary());
1124 Row const & row2 = pm2.getRow(end.pos(), end.boundary());
1128 bool const clipAbove =
1129 (bv_funcs::status(bv_, beg) == bv_funcs::CUR_ABOVE);
1133 middleTop = bv_funcs::getPos(*bv_, beg, beg.boundary()).y_ + row1.descent();
1137 bool const clipBelow =
1138 (bv_funcs::status(bv_, end) == bv_funcs::CUR_BELOW);
1140 middleBottom = bv_->workHeight();
1142 middleBottom = bv_funcs::getPos(*bv_, end, end.boundary()).y_ - row2.ascent();
1144 // start and end in the same line?
1145 if (!(clipAbove || clipBelow) && &row1 == &row2)
1146 // then only draw this row's selection
1147 drawRowSelection(pi, x, row1, beg, end, false, false);
1151 DocIterator begRowEnd = beg;
1152 begRowEnd.pos() = row1.endpos();
1153 begRowEnd.boundary(true);
1155 // draw upper rectangle
1156 drawRowSelection(pi, x, row1, beg, begRowEnd, false, true);
1159 if (middleTop < middleBottom) {
1160 // draw middle rectangle
1161 pi.pain.fillRectangle(x, middleTop, width(), middleBottom - middleTop,
1167 DocIterator endRowBeg = end;
1168 endRowBeg.pos() = row2.pos();
1169 endRowBeg.boundary(false);
1171 // draw low rectangle
1172 drawRowSelection(pi, x, row2, endRowBeg, end, true, false);
1178 void TextMetrics::drawRowSelection(PainterInfo & pi, int x, Row const & row,
1179 DocIterator const & beg, DocIterator const & end,
1180 bool drawOnBegMargin, bool drawOnEndMargin) const
1182 Buffer & buffer = bv_->buffer();
1183 DocIterator cur = beg;
1184 int x1 = text_->cursorX(*bv_, beg.top(), beg.boundary());
1185 int x2 = text_->cursorX(*bv_, end.top(), end.boundary());
1186 int y1 = bv_funcs::getPos(*bv_, cur, cur.boundary()).y_ - row.ascent();
1187 int y2 = y1 + row.height();
1190 if (drawOnBegMargin) {
1191 if (text_->isRTL(buffer, beg.paragraph()))
1192 pi.pain.fillRectangle(x + x1, y1, width() - x1, y2 - y1, Color::selection);
1194 pi.pain.fillRectangle(x, y1, x1, y2 - y1, Color::selection);
1197 if (drawOnEndMargin) {
1198 if (text_->isRTL(buffer, beg.paragraph()))
1199 pi.pain.fillRectangle(x, y1, x2, y2 - y1, Color::selection);
1201 pi.pain.fillRectangle(x + x2, y1, width() - x2, y2 - y1, Color::selection);
1204 // if we are on a boundary from the beginning, it's probably
1205 // a RTL boundary and we jump to the other side directly as this
1206 // segement is 0-size and confuses the logic below
1208 cur.boundary(false);
1210 // go through row and draw from RTL boundary to RTL boundary
1212 bool drawNow = false;
1214 // simplified cursorRight code below which does not
1215 // descend into insets and which does not go into the
1216 // next line. Compare the logic with the original cursorRight
1218 // if left of boundary -> just jump to right side
1219 // but for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
1220 if (cur.boundary()) {
1221 cur.boundary(false);
1222 } else if (text_->isRTLBoundary(buffer, cur.paragraph(), cur.pos() + 1)) {
1223 // in front of RTL boundary -> Stay on this side of the boundary because:
1224 // ab|cDDEEFFghi -> abc|DDEEFFghi
1233 if (cur.pos() == row.endpos())
1238 // the previous segment was just drawn, now the next starts
1239 x1 = text_->cursorX(*bv_, cur.top(), cur.boundary());
1242 if (!(cur < end) || drawNow) {
1243 x2 = text_->cursorX(*bv_, cur.top(), cur.boundary());
1244 pi.pain.fillRectangle(x + min(x1,x2), y1, abs(x2 - x1), y2 - y1,
1247 // reset x1, so it is set again next round (which will be on the
1248 // right side of a boundary or at the selection end)
1254 //int Text::pos2x(pit_type pit, pos_type pos) const
1256 // ParagraphMetrics const & pm = par_metrics_[pit];
1257 // Row const & r = pm.rows()[row];
1263 int defaultRowHeight()
1265 return int(theFontMetrics(Font(Font::ALL_SANE)).maxHeight() * 1.2);