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 "buffer_funcs.h"
24 #include "BufferParams.h"
25 #include "BufferView.h"
26 #include "bufferview_funcs.h"
28 #include "CoordCache.h"
29 #include "CutAndPaste.h"
31 #include "FontIterator.h"
32 #include "FuncRequest.h"
35 #include "MetricsInfo.h"
36 #include "paragraph_funcs.h"
37 #include "ParagraphParameters.h"
38 #include "ParIterator.h"
39 #include "rowpainter.h"
44 #include "frontends/FontMetrics.h"
45 #include "frontends/Painter.h"
47 #include <boost/current_function.hpp>
55 using frontend::FontMetrics;
59 int numberOfSeparators(Paragraph const & par, Row const & row)
61 pos_type const first = max(row.pos(), par.beginOfBody());
62 pos_type const last = row.endpos() - 1;
64 for (pos_type p = first; p < last; ++p) {
65 if (par.isSeparator(p))
72 int numberOfLabelHfills(Paragraph const & par, Row const & row)
74 pos_type last = row.endpos() - 1;
75 pos_type first = row.pos();
77 // hfill *DO* count at the beginning of paragraphs!
79 while (first < last && par.isHfill(first))
83 last = min(last, par.beginOfBody());
85 for (pos_type p = first; p < last; ++p) {
93 int numberOfHfills(Paragraph const & par, Row const & row)
95 pos_type const last = row.endpos();
96 pos_type first = row.pos();
98 // hfill *DO* count at the beginning of paragraphs!
100 while (first < last && par.isHfill(first))
104 first = max(first, par.beginOfBody());
107 for (pos_type p = first; p < last; ++p) {
116 TextMetrics::TextMetrics(BufferView * bv, Text * text)
117 : bv_(bv), text_(text)
120 max_width_ = bv_->workWidth();
121 dim_.wid = max_width_;
125 //text_->updateLabels(bv->buffer());
129 ParagraphMetrics const & TextMetrics::parMetrics(pit_type pit) const
131 return const_cast<TextMetrics *>(this)->parMetrics(pit, true);
135 ParagraphMetrics & TextMetrics::parMetrics(pit_type pit,
138 ParMetricsCache::iterator pmc_it = par_metrics_.find(pit);
139 if (pmc_it == par_metrics_.end()) {
140 pmc_it = par_metrics_.insert(
141 std::make_pair(pit, ParagraphMetrics(text_->getPar(pit)))).first;
143 if (pmc_it->second.rows().empty() && redo) {
146 return pmc_it->second;
150 bool TextMetrics::metrics(MetricsInfo & mi, Dimension & dim)
152 BOOST_ASSERT(mi.base.textwidth);
153 max_width_ = mi.base.textwidth;
154 // backup old dimension.
155 Dimension const old_dim = dim_;
158 size_t npar = text_->paragraphs().size();
160 // If there is more than one row, expand the text to
161 // the full allowable width.
162 dim_.wid = max_width_;
164 //lyxerr << "TextMetrics::metrics: width: " << mi.base.textwidth
165 // << " maxWidth: " << max_width_ << "\nfont: " << mi.base.font << endl;
167 bool changed = false;
169 for (pit_type pit = 0; pit != npar; ++pit) {
170 changed |= redoParagraph(pit);
171 ParagraphMetrics const & pm = par_metrics_[pit];
173 if (dim_.wid < pm.width())
174 dim_.wid = pm.width();
177 dim_.asc = par_metrics_[0].ascent();
178 dim_.des = h - dim_.asc;
179 //lyxerr << "dim_.wid " << dim_.wid << endl;
180 //lyxerr << "dim_.asc " << dim_.asc << endl;
181 //lyxerr << "dim_.des " << dim_.des << endl;
183 changed |= dim_ != old_dim;
189 int TextMetrics::rightMargin(ParagraphMetrics const & pm) const
191 return main_text_? pm.rightMargin(bv_->buffer()) : 0;
195 int TextMetrics::rightMargin(pit_type const pit) const
197 return main_text_? par_metrics_[pit].rightMargin(bv_->buffer()) : 0;
201 bool TextMetrics::redoParagraph(pit_type const pit)
203 Paragraph & par = text_->getPar(pit);
204 // IMPORTANT NOTE: We pass 'false' explicitely in order to not call
205 // redoParagraph() recursively inside parMetrics.
206 Dimension old_dim = parMetrics(pit, false).dim();
207 ParagraphMetrics & pm = par_metrics_[pit];
210 Buffer & buffer = bv_->buffer();
211 BufferParams const & bparams = buffer.params();
212 main_text_ = (text_ == &buffer.text());
213 bool changed = false;
215 // FIXME This check ought to be done somewhere else. It is the reason
216 // why text_ is not const. But then, where else to do it?
217 // Well, how can you end up with either (a) a biblio environment that
218 // has no InsetBibitem or (b) a biblio environment with more than one
219 // InsetBibitem? I think the answer is: when paragraphs are merged;
220 // when layout is set; when material is pasted.
221 int const moveCursor = par.checkBiblio(buffer.params().trackChanges);
223 const_cast<Cursor &>(bv_->cursor()).posRight();
224 else if (moveCursor < 0) {
225 Cursor & cursor = const_cast<Cursor &>(bv_->cursor());
226 if (cursor.pos() >= -moveCursor)
230 // Optimisation: this is used in the next two loops
231 // so better to calculate that once here.
232 int const right_margin = rightMargin(pm);
235 // FIXME: We should always use getFont(), see documentation of
236 // noFontChange() in Inset.h.
237 Font const bufferfont = buffer.params().getFont();
238 InsetList::const_iterator ii = par.insetlist.begin();
239 InsetList::const_iterator iend = par.insetlist.end();
240 for (; ii != iend; ++ii) {
241 Dimension old_dim = ii->inset->dimension();
243 int const w = max_width_ - leftMargin(max_width_, pit, ii->pos)
245 Font const & font = ii->inset->noFontChange() ?
246 bufferfont : text_->getFont(buffer, par, ii->pos);
247 MetricsInfo mi(bv_, font, w);
248 changed |= ii->inset->metrics(mi, dim);
249 changed |= (old_dim != dim);
252 par.setBeginOfBody();
254 size_t row_index = 0;
255 // maximum pixel width of a row
256 int width = max_width_ - right_margin; // - leftMargin(max_width_, pit, row);
259 pos_type end = rowBreakPoint(width, pit, first);
260 if (row_index || end < par.size())
261 // If there is more than one row, expand the text to
262 // the full allowable width. This setting here is needed
263 // for the computeRowMetrics below().
264 dim_.wid = max_width_;
266 dim.wid = rowWidth(right_margin, pit, first, end);
267 boost::tie(dim.asc, dim.des) = rowHeight(pit, first, end);
268 if (row_index == pm.rows().size())
269 pm.rows().push_back(Row());
270 Row & row = pm.rows()[row_index];
271 row.setChanged(false);
274 row.setDimension(dim);
275 computeRowMetrics(pit, row);
276 pm.computeRowSignature(row, bparams);
280 pm.dim().wid = std::max(pm.dim().wid, dim.wid);
281 pm.dim().des += dim.height();
282 } while (first < par.size());
284 if (row_index < pm.rows().size())
285 pm.rows().resize(row_index);
287 // Make sure that if a par ends in newline, there is one more row
289 if (first > 0 && par.isNewline(first - 1)) {
291 dim.wid = rowWidth(right_margin, pit, first, first);
292 boost::tie(dim.asc, dim.des) = rowHeight(pit, first, first);
293 if (row_index == pm.rows().size())
294 pm.rows().push_back(Row());
295 Row & row = pm.rows()[row_index];
296 row.setChanged(false);
299 row.setDimension(dim);
300 computeRowMetrics(pit, row);
301 pm.computeRowSignature(row, bparams);
302 pm.dim().des += dim.height();
305 pm.dim().asc += pm.rows()[0].ascent();
306 pm.dim().des -= pm.rows()[0].ascent();
308 changed |= old_dim.height() != pm.dim().height();
314 void TextMetrics::computeRowMetrics(pit_type const pit,
322 Buffer & buffer = bv_->buffer();
323 Paragraph const & par = text_->getPar(pit);
325 double w = dim_.wid - row.width();
326 // FIXME: put back this assertion when the crash on new doc is solved.
327 //BOOST_ASSERT(w >= 0);
329 //lyxerr << "\ndim_.wid " << dim_.wid << endl;
330 //lyxerr << "row.width() " << row.width() << endl;
331 //lyxerr << "w " << w << endl;
333 bool const is_rtl = text_->isRTL(buffer, par);
335 row.x = rightMargin(pit);
337 row.x = leftMargin(max_width_, pit, row.pos());
339 // is there a manual margin with a manual label
340 LayoutPtr const & layout = par.layout();
342 if (layout->margintype == MARGIN_MANUAL
343 && layout->labeltype == LABEL_MANUAL) {
344 /// We might have real hfills in the label part
345 int nlh = numberOfLabelHfills(par, row);
347 // A manual label par (e.g. List) has an auto-hfill
348 // between the label text and the body of the
350 // But we don't want to do this auto hfill if the par
355 if (nlh && !par.getLabelWidthString().empty())
356 row.label_hfill = labelFill(pit, row) / double(nlh);
359 // are there any hfills in the row?
360 int const nh = numberOfHfills(par, row);
365 // we don't have to look at the alignment if it is ALIGN_LEFT and
366 // if the row is already larger then the permitted width as then
367 // we force the LEFT_ALIGN'edness!
368 } else if (int(row.width()) < max_width_) {
369 // is it block, flushleft or flushright?
370 // set x how you need it
372 if (par.params().align() == LYX_ALIGN_LAYOUT)
373 align = layout->align;
375 align = par.params().align();
377 // Display-style insets should always be on a centred row
378 // The test on par.size() is to catch zero-size pars, which
379 // would trigger the assert in Paragraph::getInset().
380 //inset = par.size() ? par.getInset(row.pos()) : 0;
381 if (row.pos() < par.size()
382 && par.isInset(row.pos()))
384 switch(par.getInset(row.pos())->display()) {
385 case Inset::AlignLeft:
386 align = LYX_ALIGN_BLOCK;
388 case Inset::AlignCenter:
389 align = LYX_ALIGN_CENTER;
392 case Inset::AlignRight:
393 // unchanged (use align)
399 case LYX_ALIGN_BLOCK: {
400 int const ns = numberOfSeparators(par, row);
401 bool disp_inset = false;
402 if (row.endpos() < par.size()) {
403 Inset const * in = par.getInset(row.endpos());
405 disp_inset = in->display();
407 // If we have separators, this is not the last row of a
408 // par, does not end in newline, and is not row above a
409 // display inset... then stretch it
411 && row.endpos() < par.size()
412 && !par.isNewline(row.endpos() - 1)
415 row.separator = w / ns;
416 //lyxerr << "row.separator " << row.separator << endl;
417 //lyxerr << "ns " << ns << endl;
423 case LYX_ALIGN_RIGHT:
426 case LYX_ALIGN_CENTER:
433 pos_type body_pos = par.beginOfBody();
434 pos_type end = row.endpos();
437 && (body_pos > end || !par.isLineSeparator(body_pos - 1)))
439 row.x += theFontMetrics(text_->getLabelFont(buffer, par)).
440 width(layout->labelsep);
442 row.x += row.label_hfill;
448 int TextMetrics::labelFill(pit_type const pit, Row const & row) const
450 Buffer & buffer = bv_->buffer();
451 Paragraph const & par = text_->getPar(pit);
453 pos_type last = par.beginOfBody();
454 BOOST_ASSERT(last > 0);
456 // -1 because a label ends with a space that is in the label
459 // a separator at this end does not count
460 if (par.isLineSeparator(last))
464 for (pos_type i = row.pos(); i <= last; ++i)
465 w += singleWidth(pit, i);
467 docstring const & label = par.params().labelWidthString();
471 FontMetrics const & fm
472 = theFontMetrics(text_->getLabelFont(buffer, par));
474 return max(0, fm.width(label) - w);
480 // this needs special handling - only newlines count as a break point
481 pos_type addressBreakPoint(pos_type i, Paragraph const & par)
483 pos_type const end = par.size();
486 if (par.isNewline(i))
495 int TextMetrics::labelEnd(pit_type const pit) const
497 // labelEnd is only needed if the layout fills a flushleft label.
498 if (text_->getPar(pit).layout()->margintype != MARGIN_MANUAL)
500 // return the beginning of the body
501 return leftMargin(max_width_, pit);
505 pit_type TextMetrics::rowBreakPoint(int width, pit_type const pit,
508 Buffer & buffer = bv_->buffer();
509 ParagraphMetrics const & pm = par_metrics_[pit];
510 Paragraph const & par = text_->getPar(pit);
511 pos_type const end = par.size();
512 if (pos == end || width < 0)
515 LayoutPtr const & layout = par.layout();
517 if (layout->margintype == MARGIN_RIGHT_ADDRESS_BOX)
518 return addressBreakPoint(pos, par);
520 pos_type const body_pos = par.beginOfBody();
523 // Now we iterate through until we reach the right margin
524 // or the end of the par, then choose the possible break
527 int label_end = labelEnd(pit);
528 int const left = leftMargin(max_width_, pit, pos);
531 // pixel width since last breakpoint
534 FontIterator fi = FontIterator(buffer, *text_, par, pos);
535 pos_type point = end;
537 for ( ; i < end; ++i, ++fi) {
538 int thiswidth = pm.singleWidth(i, *fi);
540 // add the auto-hfill from label end to the body
541 if (body_pos && i == body_pos) {
542 FontMetrics const & fm = theFontMetrics(
543 text_->getLabelFont(buffer, par));
544 int add = fm.width(layout->labelsep);
545 if (par.isLineSeparator(i - 1))
546 add -= singleWidth(pit, i - 1);
548 add = std::max(add, label_end - x);
553 chunkwidth += thiswidth;
555 // break before a character that will fall off
556 // the right of the row
558 // if no break before, break here
559 if (point == end || chunkwidth >= width - left) {
566 // exit on last registered breakpoint:
570 if (par.isNewline(i)) {
576 if (par.isInset(i + 1) && par.getInset(i + 1)->display()) {
581 if (par.isInset(i) && par.getInset(i)->display()) {
587 if (!par.isInset(i) || par.getInset(i)->isChar()) {
588 // some insets are line separators too
589 if (par.isLineSeparator(i)) {
590 // register breakpoint:
597 // maybe found one, but the par is short enough.
598 if (i == end && x < width)
601 // manual labels cannot be broken in LaTeX. But we
602 // want to make our on-screen rendering of footnotes
604 if (body_pos && point < body_pos)
611 int TextMetrics::rowWidth(int right_margin, pit_type const pit,
612 pos_type const first, pos_type const end) const
614 Buffer & buffer = bv_->buffer();
615 // get the pure distance
616 ParagraphMetrics const & pm = par_metrics_[pit];
617 Paragraph const & par = text_->getPar(pit);
618 int w = leftMargin(max_width_, pit, first);
619 int label_end = labelEnd(pit);
621 pos_type const body_pos = par.beginOfBody();
625 FontIterator fi = FontIterator(buffer, *text_, par, i);
626 for ( ; i < end; ++i, ++fi) {
627 if (body_pos > 0 && i == body_pos) {
628 FontMetrics const & fm = theFontMetrics(
629 text_->getLabelFont(buffer, par));
630 w += fm.width(par.layout()->labelsep);
631 if (par.isLineSeparator(i - 1))
632 w -= singleWidth(pit, i - 1);
633 w = max(w, label_end);
635 w += pm.singleWidth(i, *fi);
639 if (body_pos > 0 && body_pos >= end) {
640 FontMetrics const & fm = theFontMetrics(
641 text_->getLabelFont(buffer, par));
642 w += fm.width(par.layout()->labelsep);
643 if (end > 0 && par.isLineSeparator(end - 1))
644 w -= singleWidth(pit, end - 1);
645 w = max(w, label_end);
648 return w + right_margin;
652 boost::tuple<int, int> TextMetrics::rowHeight(pit_type const pit, pos_type const first,
653 pos_type const end) const
655 Paragraph const & par = text_->getPar(pit);
656 // get the maximum ascent and the maximum descent
657 double layoutasc = 0;
658 double layoutdesc = 0;
659 double const dh = defaultRowHeight();
661 // ok, let us initialize the maxasc and maxdesc value.
662 // Only the fontsize count. The other properties
663 // are taken from the layoutfont. Nicer on the screen :)
664 LayoutPtr const & layout = par.layout();
666 // as max get the first character of this row then it can
667 // increase but not decrease the height. Just some point to
668 // start with so we don't have to do the assignment below too
670 Buffer const & buffer = bv_->buffer();
671 Font font = text_->getFont(buffer, par, first);
672 Font::FONT_SIZE const tmpsize = font.size();
673 font = text_->getLayoutFont(buffer, pit);
674 Font::FONT_SIZE const size = font.size();
675 font.setSize(tmpsize);
677 Font labelfont = text_->getLabelFont(buffer, par);
679 FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
680 FontMetrics const & fontmetrics = theFontMetrics(font);
682 // these are minimum values
683 double const spacing_val = layout->spacing.getValue()
684 * text_->spacing(buffer, par);
685 //lyxerr << "spacing_val = " << spacing_val << endl;
686 int maxasc = int(fontmetrics.maxAscent() * spacing_val);
687 int maxdesc = int(fontmetrics.maxDescent() * spacing_val);
689 // insets may be taller
690 InsetList::const_iterator ii = par.insetlist.begin();
691 InsetList::const_iterator iend = par.insetlist.end();
692 for ( ; ii != iend; ++ii) {
693 if (ii->pos >= first && ii->pos < end) {
694 maxasc = max(maxasc, ii->inset->ascent());
695 maxdesc = max(maxdesc, ii->inset->descent());
699 // Check if any custom fonts are larger (Asger)
700 // This is not completely correct, but we can live with the small,
701 // cosmetic error for now.
704 Font::FONT_SIZE maxsize =
705 par.highestFontInRange(first, end, size);
706 if (maxsize > font.size()) {
707 // use standard paragraph font with the maximal size
709 maxfont.setSize(maxsize);
710 FontMetrics const & maxfontmetrics = theFontMetrics(maxfont);
711 maxasc = max(maxasc, maxfontmetrics.maxAscent());
712 maxdesc = max(maxdesc, maxfontmetrics.maxDescent());
715 // This is nicer with box insets:
719 ParagraphList const & pars = text_->paragraphs();
723 BufferParams const & bufparams = buffer.params();
724 // some parskips VERY EASY IMPLEMENTATION
725 if (bufparams.paragraph_separation
726 == BufferParams::PARSEP_SKIP
727 && par.ownerCode() != Inset::ERT_CODE
728 && par.ownerCode() != Inset::LISTINGS_CODE
730 && ((layout->isParagraph() && par.getDepth() == 0)
731 || (pars[pit - 1].layout()->isParagraph()
732 && pars[pit - 1].getDepth() == 0)))
734 maxasc += bufparams.getDefSkip().inPixels(*bv_);
737 if (par.params().startOfAppendix())
738 maxasc += int(3 * dh);
740 // This is special code for the chapter, since the label of this
741 // layout is printed in an extra row
742 if (layout->counter == "chapter"
743 && !par.params().labelString().empty()) {
744 labeladdon = int(labelfont_metrics.maxHeight()
745 * layout->spacing.getValue()
746 * text_->spacing(buffer, par));
749 // special code for the top label
750 if ((layout->labeltype == LABEL_TOP_ENVIRONMENT
751 || layout->labeltype == LABEL_BIBLIO
752 || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
753 && isFirstInSequence(pit, pars)
754 && !par.getLabelstring().empty())
757 labelfont_metrics.maxHeight()
758 * layout->spacing.getValue()
759 * text_->spacing(buffer, par)
760 + (layout->topsep + layout->labelbottomsep) * dh);
763 // Add the layout spaces, for example before and after
764 // a section, or between the items of a itemize or enumerate
767 pit_type prev = depthHook(pit, pars, par.getDepth());
768 Paragraph const & prevpar = pars[prev];
770 && prevpar.layout() == layout
771 && prevpar.getDepth() == par.getDepth()
772 && prevpar.getLabelWidthString()
773 == par.getLabelWidthString()) {
774 layoutasc = layout->itemsep * dh;
775 } else if (pit != 0 || first != 0) {
776 if (layout->topsep > 0)
777 layoutasc = layout->topsep * dh;
780 prev = outerHook(pit, pars);
781 if (prev != pit_type(pars.size())) {
782 maxasc += int(pars[prev].layout()->parsep * dh);
783 } else if (pit != 0) {
784 Paragraph const & prevpar = pars[pit - 1];
785 if (prevpar.getDepth() != 0 ||
786 prevpar.layout() == layout) {
787 maxasc += int(layout->parsep * dh);
792 // is it a bottom line?
793 if (end >= par.size()) {
794 // add the layout spaces, for example before and after
795 // a section, or between the items of a itemize or enumerate
797 pit_type nextpit = pit + 1;
798 if (nextpit != pit_type(pars.size())) {
803 if (pars[cpit].getDepth() > pars[nextpit].getDepth()) {
804 usual = pars[cpit].layout()->bottomsep * dh;
805 cpit = depthHook(cpit, pars, pars[nextpit].getDepth());
806 if (pars[cpit].layout() != pars[nextpit].layout()
807 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
809 unusual = pars[cpit].layout()->bottomsep * dh;
811 layoutdesc = max(unusual, usual);
812 } else if (pars[cpit].getDepth() == pars[nextpit].getDepth()) {
813 if (pars[cpit].layout() != pars[nextpit].layout()
814 || pars[nextpit].getLabelWidthString() != pars[cpit].getLabelWidthString())
815 layoutdesc = int(pars[cpit].layout()->bottomsep * dh);
820 // incalculate the layout spaces
821 maxasc += int(layoutasc * 2 / (2 + pars[pit].getDepth()));
822 maxdesc += int(layoutdesc * 2 / (2 + pars[pit].getDepth()));
824 // FIXME: the correct way is to do the following is to move the
825 // following code in another method specially tailored for the
826 // main Text. The following test is thus bogus.
827 // Top and bottom margin of the document (only at top-level)
829 if (pit == 0 && first == 0)
831 if (pit + 1 == pit_type(pars.size()) &&
833 !(end > 0 && par.isNewline(end - 1)))
837 return boost::make_tuple(maxasc + labeladdon, maxdesc);
841 // x is an absolute screen coord
842 // returns the column near the specified x-coordinate of the row
843 // x is set to the real beginning of this column
844 pos_type TextMetrics::getColumnNearX(pit_type const pit,
845 Row const & row, int & x, bool & boundary) const
847 Buffer const & buffer = bv_->buffer();
849 /// For the main Text, it is possible that this pit is not
850 /// yet in the CoordCache when moving cursor up.
851 /// x Paragraph coordinate is always 0 for main text anyway.
852 int const xo = main_text_? 0 : bv_->coordCache().get(text_, pit).x_;
854 Paragraph const & par = text_->getPar(pit);
855 ParagraphMetrics const & pm = par_metrics_[pit];
857 bidi.computeTables(par, buffer, row);
859 pos_type vc = row.pos();
860 pos_type end = row.endpos();
862 LayoutPtr const & layout = par.layout();
864 bool left_side = false;
866 pos_type body_pos = par.beginOfBody();
869 double last_tmpx = tmpx;
872 (body_pos > end || !par.isLineSeparator(body_pos - 1)))
875 // check for empty row
881 while (vc < end && tmpx <= x) {
882 c = bidi.vis2log(vc);
884 if (body_pos > 0 && c == body_pos - 1) {
885 FontMetrics const & fm = theFontMetrics(
886 text_->getLabelFont(buffer, par));
887 tmpx += row.label_hfill + fm.width(layout->labelsep);
888 if (par.isLineSeparator(body_pos - 1))
889 tmpx -= singleWidth(pit, body_pos - 1);
892 if (pm.hfillExpansion(row, c)) {
893 tmpx += singleWidth(pit, c);
897 tmpx += row.label_hfill;
898 } else if (par.isSeparator(c)) {
899 tmpx += singleWidth(pit, c);
901 tmpx += row.separator;
903 tmpx += singleWidth(pit, c);
908 if ((tmpx + last_tmpx) / 2 > x) {
913 BOOST_ASSERT(vc <= end); // This shouldn't happen.
916 // This (rtl_support test) is not needed, but gives
917 // some speedup if rtl_support == false
918 bool const lastrow = lyxrc.rtl_support && row.endpos() == par.size();
920 // If lastrow is false, we don't need to compute
922 bool const rtl = lastrow ? text_->isRTL(buffer, par) : false;
924 ((rtl && left_side && vc == row.pos() && x < tmpx - 5) ||
925 (!rtl && !left_side && vc == end && x > tmpx + 5)))
927 else if (vc == row.pos()) {
928 c = bidi.vis2log(vc);
929 if (bidi.level(c) % 2 == 1)
932 c = bidi.vis2log(vc - 1);
933 bool const rtl = (bidi.level(c) % 2 == 1);
934 if (left_side == rtl) {
936 boundary = text_->isRTLBoundary(buffer, par, c);
940 // I believe this code is not needed anymore (Jug 20050717)
942 // The following code is necessary because the cursor position past
943 // the last char in a row is logically equivalent to that before
944 // the first char in the next row. That's why insets causing row
945 // divisions -- Newline and display-style insets -- must be treated
946 // specially, so cursor up/down doesn't get stuck in an air gap -- MV
947 // Newline inset, air gap below:
948 if (row.pos() < end && c >= end && par.isNewline(end - 1)) {
949 if (bidi.level(end -1) % 2 == 0)
950 tmpx -= singleWidth(pit, end - 1);
952 tmpx += singleWidth(pit, end - 1);
956 // Air gap above display inset:
957 if (row.pos() < end && c >= end && end < par.size()
958 && par.isInset(end) && par.getInset(end)->display()) {
961 // Air gap below display inset:
962 if (row.pos() < end && c >= end && par.isInset(end - 1)
963 && par.getInset(end - 1)->display()) {
969 pos_type const col = c - row.pos();
971 if (!c || end == par.size())
974 if (c==end && !par.isLineSeparator(c-1) && !par.isNewline(c-1)) {
979 return min(col, end - 1 - row.pos());
983 pos_type TextMetrics::x2pos(pit_type pit, int row, int x) const
985 ParagraphMetrics const & pm = par_metrics_[pit];
986 BOOST_ASSERT(!pm.rows().empty());
987 BOOST_ASSERT(row < int(pm.rows().size()));
989 Row const & r = pm.rows()[row];
990 return r.pos() + getColumnNearX(pit, r, x, bound);
994 // y is screen coordinate
995 pit_type TextMetrics::getPitNearY(int y)
997 BOOST_ASSERT(!text_->paragraphs().empty());
998 BOOST_ASSERT(bv_->coordCache().getParPos().find(text_) != bv_->coordCache().getParPos().end());
999 CoordCache::InnerParPosCache const & cc = bv_->coordCache().getParPos().find(text_)->second;
1000 LYXERR(Debug::DEBUG)
1001 << BOOST_CURRENT_FUNCTION
1002 << ": y: " << y << " cache size: " << cc.size()
1005 // look for highest numbered paragraph with y coordinate less than given y
1008 CoordCache::InnerParPosCache::const_iterator it = cc.begin();
1009 CoordCache::InnerParPosCache::const_iterator et = cc.end();
1010 CoordCache::InnerParPosCache::const_iterator last = et; last--;
1012 ParagraphMetrics const & pm = par_metrics_[it->first];
1014 // If we are off-screen (before the visible part)
1016 // and even before the first paragraph in the cache.
1017 && y < it->second.y_ - int(pm.ascent())) {
1018 // and we are not at the first paragraph in the inset.
1021 // then this is the paragraph we are looking for.
1022 pit = it->first - 1;
1023 // rebreak it and update the CoordCache.
1025 bv_->coordCache().parPos()[text_][pit] =
1026 Point(0, it->second.y_ - pm.descent());
1030 ParagraphMetrics const & pm_last = par_metrics_[last->first];
1032 // If we are off-screen (after the visible part)
1033 if (y > bv_->workHeight()
1034 // and even after the first paragraph in the cache.
1035 && y >= last->second.y_ + int(pm_last.descent())) {
1036 pit = last->first + 1;
1037 // and we are not at the last paragraph in the inset.
1038 if (pit == int(text_->paragraphs().size()))
1040 // then this is the paragraph we are looking for.
1041 // rebreak it and update the CoordCache.
1043 bv_->coordCache().parPos()[text_][pit] =
1044 Point(0, last->second.y_ + pm_last.ascent());
1048 for (; it != et; ++it) {
1049 LYXERR(Debug::DEBUG)
1050 << BOOST_CURRENT_FUNCTION
1051 << " examining: pit: " << it->first
1052 << " y: " << it->second.y_
1055 ParagraphMetrics const & pm = par_metrics_[it->first];
1057 if (it->first >= pit && int(it->second.y_) - int(pm.ascent()) <= y) {
1063 LYXERR(Debug::DEBUG)
1064 << BOOST_CURRENT_FUNCTION
1065 << ": found best y: " << yy << " for pit: " << pit
1072 Row const & TextMetrics::getRowNearY(int y, pit_type pit) const
1074 ParagraphMetrics const & pm = par_metrics_[pit];
1076 int yy = bv_->coordCache().get(text_, pit).y_ - pm.ascent();
1077 BOOST_ASSERT(!pm.rows().empty());
1078 RowList::const_iterator rit = pm.rows().begin();
1079 RowList::const_iterator const rlast = boost::prior(pm.rows().end());
1080 for (; rit != rlast; yy += rit->height(), ++rit)
1081 if (yy + rit->height() > y)
1087 // x,y are absolute screen coordinates
1088 // sets cursor recursively descending into nested editable insets
1089 Inset * TextMetrics::editXY(Cursor & cur, int x, int y)
1091 if (lyxerr.debugging(Debug::WORKAREA)) {
1092 lyxerr << "TextMetrics::editXY(cur, " << x << ", " << y << ")" << std::endl;
1093 cur.bv().coordCache().dump();
1095 pit_type pit = getPitNearY(y);
1096 BOOST_ASSERT(pit != -1);
1098 Row const & row = getRowNearY(y, pit);
1101 int xx = x; // is modified by getColumnNearX
1102 pos_type const pos = row.pos()
1103 + getColumnNearX(pit, row, xx, bound);
1106 cur.boundary(bound);
1109 // try to descend into nested insets
1110 Inset * inset = checkInsetHit(x, y);
1111 //lyxerr << "inset " << inset << " hit at x: " << x << " y: " << y << endl;
1113 // Either we deconst editXY or better we move current_font
1114 // and real_current_font to Cursor
1115 // FIXME: what is needed now that current_font and real_current_font
1117 cur.setCurrentFont();
1121 ParagraphList const & pars = text_->paragraphs();
1122 Inset const * insetBefore = pos? pars[pit].getInset(pos - 1): 0;
1123 //Inset * insetBehind = pars[pit].getInset(pos);
1125 // This should be just before or just behind the
1126 // cursor position set above.
1127 BOOST_ASSERT((pos != 0 && inset == insetBefore)
1128 || inset == pars[pit].getInset(pos));
1130 // Make sure the cursor points to the position before
1132 if (inset == insetBefore) {
1134 cur.boundary(false);
1137 // Try to descend recursively inside the inset.
1138 inset = inset->editXY(cur, x, y);
1140 if (cur.top().text() == text_)
1141 cur.setCurrentFont();
1146 void TextMetrics::setCursorFromCoordinates(Cursor & cur, int const x, int const y)
1148 BOOST_ASSERT(text_ == cur.text());
1149 pit_type pit = getPitNearY(y);
1151 ParagraphMetrics const & pm = par_metrics_[pit];
1153 int yy = bv_->coordCache().get(text_, pit).y_ - pm.ascent();
1154 LYXERR(Debug::DEBUG)
1155 << BOOST_CURRENT_FUNCTION
1159 << " yy: " << yy << endl;
1162 BOOST_ASSERT(pm.rows().size());
1163 for (; r < int(pm.rows().size()) - 1; ++r) {
1164 Row const & row = pm.rows()[r];
1165 if (int(yy + row.height()) > y)
1170 Row const & row = pm.rows()[r];
1172 LYXERR(Debug::DEBUG)
1173 << BOOST_CURRENT_FUNCTION
1175 << " from pos: " << row.pos()
1180 pos_type const pos = row.pos() + getColumnNearX(pit, row, xx, bound);
1182 LYXERR(Debug::DEBUG)
1183 << BOOST_CURRENT_FUNCTION
1184 << ": setting cursor pit: " << pit
1188 text_->setCursor(cur, pit, pos, true, bound);
1189 // remember new position.
1194 //takes screen x,y coordinates
1195 Inset * TextMetrics::checkInsetHit(int x, int y)
1197 pit_type pit = getPitNearY(y);
1198 BOOST_ASSERT(pit != -1);
1200 Paragraph const & par = text_->paragraphs()[pit];
1202 LYXERR(Debug::DEBUG)
1203 << BOOST_CURRENT_FUNCTION
1208 InsetList::const_iterator iit = par.insetlist.begin();
1209 InsetList::const_iterator iend = par.insetlist.end();
1210 for (; iit != iend; ++iit) {
1211 Inset * inset = iit->inset;
1213 LYXERR(Debug::DEBUG)
1214 << BOOST_CURRENT_FUNCTION
1215 << ": examining inset " << inset << endl;
1217 if (bv_->coordCache().getInsets().has(inset))
1218 LYXERR(Debug::DEBUG)
1219 << BOOST_CURRENT_FUNCTION
1220 << ": xo: " << inset->xo(*bv_) << "..."
1221 << inset->xo(*bv_) + inset->width()
1222 << " yo: " << inset->yo(*bv_) - inset->ascent()
1224 << inset->yo(*bv_) + inset->descent()
1227 LYXERR(Debug::DEBUG)
1228 << BOOST_CURRENT_FUNCTION
1229 << ": inset has no cached position" << endl;
1231 if (inset->covers(*bv_, x, y)) {
1232 LYXERR(Debug::DEBUG)
1233 << BOOST_CURRENT_FUNCTION
1234 << ": Hit inset: " << inset << endl;
1238 LYXERR(Debug::DEBUG)
1239 << BOOST_CURRENT_FUNCTION
1240 << ": No inset hit. " << endl;
1245 int TextMetrics::cursorX(CursorSlice const & sl,
1246 bool boundary) const
1248 BOOST_ASSERT(sl.text() == text_);
1249 pit_type const pit = sl.pit();
1250 Paragraph const & par = text_->paragraphs()[pit];
1251 ParagraphMetrics const & pm = par_metrics_[pit];
1252 if (pm.rows().empty())
1255 pos_type ppos = sl.pos();
1256 // Correct position in front of big insets
1257 bool const boundary_correction = ppos != 0 && boundary;
1258 if (boundary_correction)
1261 Row const & row = pm.getRow(sl.pos(), boundary);
1263 pos_type cursor_vpos = 0;
1265 Buffer const & buffer = bv_->buffer();
1268 bidi.computeTables(par, buffer, row);
1270 pos_type const row_pos = row.pos();
1271 pos_type const end = row.endpos();
1272 // Spaces at logical line breaks in bidi text must be skipped during
1273 // cursor positioning. However, they may appear visually in the middle
1274 // of a row; they must be skipped, wherever they are...
1275 // * logically "abc_[HEBREW_\nHEBREW]"
1276 // * visually "abc_[_WERBEH\nWERBEH]"
1277 pos_type skipped_sep_vpos = -1;
1280 cursor_vpos = row_pos;
1281 else if (ppos >= end)
1282 cursor_vpos = text_->isRTL(buffer, par) ? row_pos : end;
1283 else if (ppos > row_pos && ppos >= end)
1284 // Place cursor after char at (logical) position pos - 1
1285 cursor_vpos = (bidi.level(ppos - 1) % 2 == 0)
1286 ? bidi.log2vis(ppos - 1) + 1 : bidi.log2vis(ppos - 1);
1288 // Place cursor before char at (logical) position ppos
1289 cursor_vpos = (bidi.level(ppos) % 2 == 0)
1290 ? bidi.log2vis(ppos) : bidi.log2vis(ppos) + 1;
1292 pos_type body_pos = par.beginOfBody();
1294 (body_pos > end || !par.isLineSeparator(body_pos - 1)))
1297 // Use font span to speed things up, see below
1301 // If the last logical character is a separator, skip it, unless
1302 // it's in the last row of a paragraph; see skipped_sep_vpos declaration
1303 if (end > 0 && end < par.size() && par.isSeparator(end - 1))
1304 skipped_sep_vpos = bidi.log2vis(end - 1);
1306 for (pos_type vpos = row_pos; vpos < cursor_vpos; ++vpos) {
1307 // Skip the separator which is at the logical end of the row
1308 if (vpos == skipped_sep_vpos)
1310 pos_type pos = bidi.vis2log(vpos);
1311 if (body_pos > 0 && pos == body_pos - 1) {
1312 FontMetrics const & labelfm = theFontMetrics(
1313 text_->getLabelFont(buffer, par));
1314 x += row.label_hfill + labelfm.width(par.layout()->labelsep);
1315 if (par.isLineSeparator(body_pos - 1))
1316 x -= singleWidth(pit, body_pos - 1);
1319 // Use font span to speed things up, see above
1320 if (pos < font_span.first || pos > font_span.last) {
1321 font_span = par.fontSpan(pos);
1322 font = text_->getFont(buffer, par, pos);
1325 x += pm.singleWidth(pos, font);
1327 if (pm.hfillExpansion(row, pos))
1328 x += (pos >= body_pos) ? row.hfill : row.label_hfill;
1329 else if (par.isSeparator(pos) && pos >= body_pos)
1333 // see correction above
1334 if (boundary_correction) {
1335 if (text_->isRTL(buffer, sl, boundary))
1336 x -= singleWidth(pit, ppos);
1338 x += singleWidth(pit, ppos);
1345 int TextMetrics::cursorY(CursorSlice const & sl, bool boundary) const
1347 //lyxerr << "TextMetrics::cursorY: boundary: " << boundary << std::endl;
1348 ParagraphMetrics const & pm = par_metrics_[sl.pit()];
1349 if (pm.rows().empty())
1353 h -= par_metrics_[0].rows()[0].ascent();
1354 for (pit_type pit = 0; pit < sl.pit(); ++pit) {
1355 h += par_metrics_[pit].height();
1358 if (pos && boundary)
1360 size_t const rend = pm.pos2row(pos);
1361 for (size_t rit = 0; rit != rend; ++rit)
1362 h += pm.rows()[rit].height();
1363 h += pm.rows()[rend].ascent();
1368 void TextMetrics::cursorPrevious(Cursor & cur)
1370 pos_type cpos = cur.pos();
1371 pit_type cpar = cur.pit();
1373 int x = cur.x_target();
1374 setCursorFromCoordinates(cur, x, 0);
1375 cur.dispatch(FuncRequest(cur.selection()? LFUN_UP_SELECT: LFUN_UP));
1377 if (cpar == cur.pit() && cpos == cur.pos())
1378 // we have a row which is taller than the workarea. The
1379 // simplest solution is to move to the previous row instead.
1380 cur.dispatch(FuncRequest(cur.selection()? LFUN_UP_SELECT: LFUN_UP));
1383 cur.updateFlags(Update::Force | Update::FitCursor);
1387 void TextMetrics::cursorNext(Cursor & cur)
1389 pos_type cpos = cur.pos();
1390 pit_type cpar = cur.pit();
1392 int x = cur.x_target();
1393 setCursorFromCoordinates(cur, x, cur.bv().workHeight() - 1);
1394 cur.dispatch(FuncRequest(cur.selection()? LFUN_DOWN_SELECT: LFUN_DOWN));
1396 if (cpar == cur.pit() && cpos == cur.pos())
1397 // we have a row which is taller than the workarea. The
1398 // simplest solution is to move to the next row instead.
1400 FuncRequest(cur.selection()? LFUN_DOWN_SELECT: LFUN_DOWN));
1403 cur.updateFlags(Update::Force | Update::FitCursor);
1407 // the cursor set functions have a special mechanism. When they
1408 // realize you left an empty paragraph, they will delete it.
1410 bool TextMetrics::cursorHome(Cursor & cur)
1412 BOOST_ASSERT(text_ == cur.text());
1413 ParagraphMetrics const & pm = par_metrics_[cur.pit()];
1414 Row const & row = pm.getRow(cur.pos(),cur.boundary());
1415 return text_->setCursor(cur, cur.pit(), row.pos());
1419 bool TextMetrics::cursorEnd(Cursor & cur)
1421 BOOST_ASSERT(text_ == cur.text());
1422 // if not on the last row of the par, put the cursor before
1423 // the final space exept if I have a spanning inset or one string
1424 // is so long that we force a break.
1425 pos_type end = cur.textRow().endpos();
1427 // empty text, end-1 is no valid position
1429 bool boundary = false;
1430 if (end != cur.lastpos()) {
1431 if (!cur.paragraph().isLineSeparator(end-1)
1432 && !cur.paragraph().isNewline(end-1))
1437 return text_->setCursor(cur, cur.pit(), end, true, boundary);
1441 void TextMetrics::deleteLineForward(Cursor & cur)
1443 BOOST_ASSERT(text_ == cur.text());
1444 if (cur.lastpos() == 0) {
1445 // Paragraph is empty, so we just go to the right
1446 text_->cursorRight(cur);
1449 cur.selection() = true; // to avoid deletion
1452 // What is this test for ??? (JMarc)
1453 if (!cur.selection())
1454 text_->deleteWordForward(cur);
1456 cap::cutSelection(cur, true, false);
1457 checkBufferStructure(cur.buffer(), cur);
1462 bool TextMetrics::isLastRow(pit_type pit, Row const & row) const
1464 ParagraphList const & pars = text_->paragraphs();
1465 return row.endpos() >= pars[pit].size()
1466 && pit + 1 == pit_type(pars.size());
1470 bool TextMetrics::isFirstRow(pit_type pit, Row const & row) const
1472 return row.pos() == 0 && pit == 0;
1476 int TextMetrics::leftMargin(int max_width, pit_type pit) const
1478 BOOST_ASSERT(pit >= 0);
1479 BOOST_ASSERT(pit < int(text_->paragraphs().size()));
1480 return leftMargin(max_width, pit, text_->paragraphs()[pit].size());
1484 int TextMetrics::leftMargin(int max_width,
1485 pit_type const pit, pos_type const pos) const
1487 ParagraphList const & pars = text_->paragraphs();
1489 BOOST_ASSERT(pit >= 0);
1490 BOOST_ASSERT(pit < int(pars.size()));
1491 Paragraph const & par = pars[pit];
1492 BOOST_ASSERT(pos >= 0);
1493 BOOST_ASSERT(pos <= par.size());
1494 Buffer const & buffer = bv_->buffer();
1495 //lyxerr << "TextMetrics::leftMargin: pit: " << pit << " pos: " << pos << endl;
1496 TextClass const & tclass = buffer.params().getTextClass();
1497 LayoutPtr const & layout = par.layout();
1499 docstring parindent = layout->parindent;
1503 if (text_->isMainText(buffer))
1504 l_margin += changebarMargin();
1506 l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(
1507 tclass.leftmargin());
1509 if (par.getDepth() != 0) {
1510 // find the next level paragraph
1511 pit_type newpar = outerHook(pit, pars);
1512 if (newpar != pit_type(pars.size())) {
1513 if (pars[newpar].layout()->isEnvironment()) {
1514 l_margin = leftMargin(max_width, newpar);
1516 if (par.layout() == tclass.defaultLayout()) {
1517 if (pars[newpar].params().noindent())
1520 parindent = pars[newpar].layout()->parindent;
1525 // This happens after sections in standard classes. The 1.3.x
1526 // code compared depths too, but it does not seem necessary
1528 if (par.layout() == tclass.defaultLayout()
1529 && pit > 0 && pars[pit - 1].layout()->nextnoindent)
1532 Font const labelfont = text_->getLabelFont(buffer, par);
1533 FontMetrics const & labelfont_metrics = theFontMetrics(labelfont);
1535 switch (layout->margintype) {
1536 case MARGIN_DYNAMIC:
1537 if (!layout->leftmargin.empty()) {
1538 l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(
1539 layout->leftmargin);
1541 if (!par.getLabelstring().empty()) {
1542 l_margin += labelfont_metrics.signedWidth(layout->labelindent);
1543 l_margin += labelfont_metrics.width(par.getLabelstring());
1544 l_margin += labelfont_metrics.width(layout->labelsep);
1548 case MARGIN_MANUAL: {
1549 l_margin += labelfont_metrics.signedWidth(layout->labelindent);
1550 // The width of an empty par, even with manual label, should be 0
1551 if (!par.empty() && pos >= par.beginOfBody()) {
1552 if (!par.getLabelWidthString().empty()) {
1553 docstring labstr = par.getLabelWidthString();
1554 l_margin += labelfont_metrics.width(labstr);
1555 l_margin += labelfont_metrics.width(layout->labelsep);
1561 case MARGIN_STATIC: {
1562 l_margin += theFontMetrics(buffer.params().getFont()).
1563 signedWidth(layout->leftmargin) * 4 / (par.getDepth() + 4);
1567 case MARGIN_FIRST_DYNAMIC:
1568 if (layout->labeltype == LABEL_MANUAL) {
1569 if (pos >= par.beginOfBody()) {
1570 l_margin += labelfont_metrics.signedWidth(layout->leftmargin);
1572 l_margin += labelfont_metrics.signedWidth(layout->labelindent);
1575 // Special case to fix problems with
1577 || (layout->labeltype == LABEL_STATIC
1578 && layout->latextype == LATEX_ENVIRONMENT
1579 && !isFirstInSequence(pit, pars))) {
1580 l_margin += labelfont_metrics.signedWidth(layout->leftmargin);
1581 } else if (layout->labeltype != LABEL_TOP_ENVIRONMENT
1582 && layout->labeltype != LABEL_BIBLIO
1583 && layout->labeltype !=
1584 LABEL_CENTERED_TOP_ENVIRONMENT) {
1585 l_margin += labelfont_metrics.signedWidth(layout->labelindent);
1586 l_margin += labelfont_metrics.width(layout->labelsep);
1587 l_margin += labelfont_metrics.width(par.getLabelstring());
1591 case MARGIN_RIGHT_ADDRESS_BOX: {
1593 // ok, a terrible hack. The left margin depends on the widest
1594 // row in this paragraph.
1595 RowList::iterator rit = par.rows().begin();
1596 RowList::iterator end = par.rows().end();
1597 // FIXME: This is wrong.
1598 int minfill = max_width;
1599 for ( ; rit != end; ++rit)
1600 if (rit->fill() < minfill)
1601 minfill = rit->fill();
1602 l_margin += theFontMetrics(params.getFont()).signedWidth(layout->leftmargin);
1603 l_margin += minfill;
1605 // also wrong, but much shorter.
1606 l_margin += max_width / 2;
1611 if (!par.params().leftIndent().zero())
1612 l_margin += par.params().leftIndent().inPixels(max_width);
1616 if (par.params().align() == LYX_ALIGN_LAYOUT)
1617 align = layout->align;
1619 align = par.params().align();
1621 // set the correct parindent
1623 && (layout->labeltype == LABEL_NO_LABEL
1624 || layout->labeltype == LABEL_TOP_ENVIRONMENT
1625 || layout->labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
1626 || (layout->labeltype == LABEL_STATIC
1627 && layout->latextype == LATEX_ENVIRONMENT
1628 && !isFirstInSequence(pit, pars)))
1629 && align == LYX_ALIGN_BLOCK
1630 && !par.params().noindent()
1631 // in some insets, paragraphs are never indented
1632 && !(par.inInset() && par.inInset()->neverIndent(buffer))
1633 // display style insets are always centered, omit indentation
1636 && par.getInset(pos)->display())
1637 && (par.layout() != tclass.defaultLayout()
1638 || buffer.params().paragraph_separation ==
1639 BufferParams::PARSEP_INDENT))
1641 l_margin += theFontMetrics(buffer.params().getFont()).signedWidth(
1649 int TextMetrics::singleWidth(pit_type pit, pos_type pos) const
1651 Buffer const & buffer = bv_->buffer();
1652 ParagraphMetrics const & pm = par_metrics_[pit];
1654 return pm.singleWidth(pos, text_->getFont(buffer, text_->getPar(pit), pos));
1658 // only used for inset right now. should also be used for main text
1659 void TextMetrics::draw(PainterInfo & pi, int x, int y) const
1661 if (par_metrics_.empty())
1664 ParMetricsCache::const_iterator it = par_metrics_.begin();
1665 ParMetricsCache::const_iterator const end = par_metrics_.end();
1666 y -= it->second.ascent();
1667 for (; it != end; ++it) {
1668 ParagraphMetrics const & pmi = it->second;
1670 drawParagraph(pi, it->first, x, y);
1676 void TextMetrics::drawParagraph(PainterInfo & pi, pit_type pit, int x, int y) const
1678 // lyxerr << " paintPar: pit: " << pit << " at y: " << y << endl;
1679 int const ww = bv_->workHeight();
1681 bv_->coordCache().parPos()[text_][pit] = Point(x, y);
1683 ParagraphMetrics const & pm = par_metrics_[pit];
1684 if (pm.rows().empty())
1687 RowList::const_iterator const rb = pm.rows().begin();
1688 RowList::const_iterator const re = pm.rows().end();
1693 for (RowList::const_iterator rit = rb; rit != re; ++rit) {
1696 bool const inside = (y + rit->descent() >= 0
1697 && y - rit->ascent() < ww);
1698 // it is not needed to draw on screen if we are not inside.
1699 pi.pain.setDrawingEnabled(inside);
1700 RowPainter rp(pi, *text_, pit, *rit, bidi, x, y);
1702 // Row signature; has row changed since last paint?
1703 bool row_has_changed = rit->changed();
1705 if (!pi.full_repaint && !row_has_changed) {
1706 // Paint the only the insets if the text itself is
1708 rp.paintOnlyInsets();
1709 y += rit->descent();
1713 // Paint the row if a full repaint has been requested or it has
1715 // Clear background of this row
1716 // (if paragraph background was not cleared)
1717 if (!pi.full_repaint && row_has_changed) {
1718 pi.pain.fillRectangle(x, y - rit->ascent(),
1719 width(), rit->height(),
1720 text_->backgroundColor());
1723 // Instrumentation for testing row cache (see also
1725 if (lyxerr.debugging(Debug::PAINTING)) {
1726 if (text_->isMainText(bv_->buffer()))
1727 LYXERR(Debug::PAINTING) << "\n{" <<
1728 pi.full_repaint << row_has_changed << "}";
1730 LYXERR(Debug::PAINTING) << "[" <<
1731 pi.full_repaint << row_has_changed << "]";
1734 // Backup full_repaint status and force full repaint
1735 // for inner insets as the Row has been cleared out.
1736 bool tmp = pi.full_repaint;
1737 pi.full_repaint = true;
1740 rp.paintChangeBar();
1746 y += rit->descent();
1747 // Restore full_repaint status.
1748 pi.full_repaint = tmp;
1750 // Re-enable screen drawing for future use of the painter.
1751 pi.pain.setDrawingEnabled(true);
1753 //LYXERR(Debug::PAINTING) << "." << endl;
1757 // only used for inset right now. should also be used for main text
1758 void TextMetrics::drawSelection(PainterInfo & pi, int x, int) const
1760 Cursor & cur = bv_->cursor();
1761 if (!cur.selection())
1763 if (!ptr_cmp(cur.text(), text_))
1766 LYXERR(Debug::DEBUG)
1767 << BOOST_CURRENT_FUNCTION
1768 << "draw selection at " << x
1771 DocIterator beg = cur.selectionBegin();
1772 DocIterator end = cur.selectionEnd();
1774 // the selection doesn't touch the visible screen?
1775 if (bv_funcs::status(bv_, beg) == bv_funcs::CUR_BELOW
1776 || bv_funcs::status(bv_, end) == bv_funcs::CUR_ABOVE)
1779 if (beg.pit() < par_metrics_.begin()->first)
1780 beg.pit() = par_metrics_.begin()->first;
1781 if (end.pit() > par_metrics_.rbegin()->first)
1782 end.pit() = par_metrics_.rbegin()->first;
1784 ParagraphMetrics const & pm1 = par_metrics_[beg.pit()];
1785 ParagraphMetrics const & pm2 = par_metrics_[end.pit()];
1786 Row const & row1 = pm1.getRow(beg.pos(), beg.boundary());
1787 Row const & row2 = pm2.getRow(end.pos(), end.boundary());
1791 bool const clipAbove =
1792 (bv_funcs::status(bv_, beg) == bv_funcs::CUR_ABOVE);
1796 middleTop = bv_funcs::getPos(*bv_, beg, beg.boundary()).y_ + row1.descent();
1800 bool const clipBelow =
1801 (bv_funcs::status(bv_, end) == bv_funcs::CUR_BELOW);
1803 middleBottom = bv_->workHeight();
1805 middleBottom = bv_funcs::getPos(*bv_, end, end.boundary()).y_ - row2.ascent();
1807 // start and end in the same line?
1808 if (!(clipAbove || clipBelow) && &row1 == &row2)
1809 // then only draw this row's selection
1810 drawRowSelection(pi, x, row1, beg, end, false, false);
1814 DocIterator begRowEnd = beg;
1815 begRowEnd.pos() = row1.endpos();
1816 begRowEnd.boundary(true);
1818 // draw upper rectangle
1819 drawRowSelection(pi, x, row1, beg, begRowEnd, false, true);
1822 if (middleTop < middleBottom) {
1823 // draw middle rectangle
1824 pi.pain.fillRectangle(x, middleTop, width(), middleBottom - middleTop,
1830 DocIterator endRowBeg = end;
1831 endRowBeg.pos() = row2.pos();
1832 endRowBeg.boundary(false);
1834 // draw low rectangle
1835 drawRowSelection(pi, x, row2, endRowBeg, end, true, false);
1841 void TextMetrics::drawRowSelection(PainterInfo & pi, int x, Row const & row,
1842 DocIterator const & beg, DocIterator const & end,
1843 bool drawOnBegMargin, bool drawOnEndMargin) const
1845 Buffer & buffer = bv_->buffer();
1846 DocIterator cur = beg;
1847 int x1 = cursorX(beg.top(), beg.boundary());
1848 int x2 = cursorX(end.top(), end.boundary());
1849 int y1 = bv_funcs::getPos(*bv_, cur, cur.boundary()).y_ - row.ascent();
1850 int y2 = y1 + row.height();
1853 if (drawOnBegMargin) {
1854 if (text_->isRTL(buffer, beg.paragraph()))
1855 pi.pain.fillRectangle(x + x1, y1, width() - x1, y2 - y1, Color::selection);
1857 pi.pain.fillRectangle(x, y1, x1, y2 - y1, Color::selection);
1860 if (drawOnEndMargin) {
1861 if (text_->isRTL(buffer, beg.paragraph()))
1862 pi.pain.fillRectangle(x, y1, x2, y2 - y1, Color::selection);
1864 pi.pain.fillRectangle(x + x2, y1, width() - x2, y2 - y1, Color::selection);
1867 // if we are on a boundary from the beginning, it's probably
1868 // a RTL boundary and we jump to the other side directly as this
1869 // segement is 0-size and confuses the logic below
1871 cur.boundary(false);
1873 // go through row and draw from RTL boundary to RTL boundary
1875 bool drawNow = false;
1877 // simplified cursorRight code below which does not
1878 // descend into insets and which does not go into the
1879 // next line. Compare the logic with the original cursorRight
1881 // if left of boundary -> just jump to right side
1882 // but for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
1883 if (cur.boundary()) {
1884 cur.boundary(false);
1885 } else if (text_->isRTLBoundary(buffer, cur.paragraph(), cur.pos() + 1)) {
1886 // in front of RTL boundary -> Stay on this side of the boundary because:
1887 // ab|cDDEEFFghi -> abc|DDEEFFghi
1896 if (cur.pos() == row.endpos())
1901 // the previous segment was just drawn, now the next starts
1902 x1 = cursorX(cur.top(), cur.boundary());
1905 if (!(cur < end) || drawNow) {
1906 x2 = cursorX(cur.top(), cur.boundary());
1907 pi.pain.fillRectangle(x + min(x1,x2), y1, abs(x2 - x1), y2 - y1,
1910 // reset x1, so it is set again next round (which will be on the
1911 // right side of a boundary or at the selection end)
1917 //int TextMetrics::pos2x(pit_type pit, pos_type pos) const
1919 // ParagraphMetrics const & pm = par_metrics_[pit];
1920 // Row const & r = pm.rows()[row];
1926 int defaultRowHeight()
1928 return int(theFontMetrics(Font(Font::ALL_SANE)).maxHeight() * 1.2);