#include "Row.h"
#include "DocIterator.h"
+#include "Language.h"
#include "frontends/FontMetrics.h"
#include "support/debug.h"
#include "support/lassert.h"
#include "support/lstrings.h"
-#include "support/lyxalgo.h"
+#include "support/lyxlib.h"
+#include <algorithm>
#include <ostream>
using namespace std;
}
-pos_type Row::Element::x2pos(int &x, bool const select) const
+pos_type Row::Element::x2pos(int &x) const
{
//lyxerr << "x2pos: x=" << x << " w=" << width() << " " << *this;
size_t i = 0;
x = isRTL() ? int(full_width()) : 0;
break;
case INSET:
- case SPACE: {
- int const boundary = select ? (full_width() + 1) / 2 : full_width();
+ case SPACE:
// those elements contain only one position. Round to
// the closest side.
- if (x > boundary) {
+ if (x > (full_width() + 1) / 2) {
x = int(full_width());
i = !isRTL();
} else {
x = 0;
i = isRTL();
}
- }
+ break;
+ case INVALID:
+ LYXERR0("x2pos: INVALID row element !");
}
//lyxerr << "=> p=" << pos + i << " x=" << x << endl;
return pos + i;
}
-bool Row::Element::breakAt(int w, bool force)
+Row::Element Row::Element::splitAt(int w, bool force)
{
- if (type != STRING || dim.wid <= w)
- return false;
+ if (type != STRING || !(row_flags & CanBreakInside))
+ return Element();
FontMetrics const & fm = theFontMetrics(font);
- int x = w;
- if(fm.breakAt(str, x, isRTL(), force)) {
- dim.wid = x;
- endpos = pos + str.length();
+ dim.wid = w;
+ int const i = fm.breakAt(str, dim.wid, isRTL(), force);
+ if (i != -1) {
+ Element ret(STRING, pos + i, font, change);
+ ret.str = str.substr(i);
+ ret.endpos = ret.pos + ret.str.length();
+ ret.row_flags = row_flags & (CanBreakInside | AfterFlags);
+ str.erase(i);
+ endpos = pos + i;
//lyxerr << "breakAt(" << w << ") Row element Broken at " << x << "(w(str)=" << fm.width(str) << "): e=" << *this << endl;
- return true;
+ return ret;
}
- return false;
+ return Element();
}
-pos_type Row::Element::left_pos() const
+bool Row::Element::breakAt(int w, bool force)
{
- return isRTL() ? endpos : pos;
+ return splitAt(w, force).isValid();
}
-pos_type Row::Element::right_pos() const
+bool Row::isMarginSelected(bool left, DocIterator const & beg,
+ DocIterator const & end) const
{
- return isRTL() ? pos : endpos;
-}
-
-
-Row::Row()
- : separator(0), label_hfill(0), left_margin(0), right_margin(0),
- sel_beg(-1), sel_end(-1),
- begin_margin_sel(false), end_margin_sel(false),
- changed_(false), crc_(0),
- pit_(0), pos_(0), end_(0),
- right_boundary_(false), flushed_(false), rtl_(false)
-{}
+ pos_type const sel_pos = left ? sel_beg : sel_end;
+ pos_type const margin_pos = left ? pos_ : end_;
-
-void Row::setCrc(size_type crc) const
-{
- changed_ = crc != crc_;
- crc_ = crc;
+ // Is there a selection and is the chosen margin selected ?
+ if (!selection() || sel_pos != margin_pos)
+ return false;
+ else if (beg.pos() == end.pos())
+ // This is a special case in which the space between after
+ // pos i-1 and before pos i is selected, i.e. the margins
+ // (see DocIterator::boundary_).
+ return beg.boundary() && !end.boundary();
+ else if (end.pos() == margin_pos)
+ // If the selection ends around the margin, it is only
+ // drawn if the cursor is after the margin.
+ return !end.boundary();
+ else if (beg.pos() == margin_pos)
+ // If the selection begins around the margin, it is
+ // only drawn if the cursor is before the margin.
+ return beg.boundary();
+ else
+ return true;
}
-bool Row::isMarginSelected(bool left_margin, DocIterator const & beg,
+void Row::setSelectionAndMargins(DocIterator const & beg,
DocIterator const & end) const
{
- pos_type const sel_pos = left_margin ? sel_beg : sel_end;
- pos_type const margin_pos = left_margin ? pos_ : end_;
-
- // Is the chosen margin selected ?
- if (sel_pos == margin_pos) {
- if (beg.pos() == end.pos())
- // This is a special case in which the space between after
- // pos i-1 and before pos i is selected, i.e. the margins
- // (see DocIterator::boundary_).
- return beg.boundary() && !end.boundary();
- else if (end.pos() == margin_pos)
- // If the selection ends around the margin, it is only
- // drawn if the cursor is after the margin.
- return !end.boundary();
- else if (beg.pos() == margin_pos)
- // If the selection begins around the margin, it is
- // only drawn if the cursor is before the margin.
- return beg.boundary();
- else
- return true;
- }
- return false;
+ setSelection(beg.pos(), end.pos());
+
+ change(end_margin_sel, isMarginSelected(false, beg, end));
+ change(begin_margin_sel, isMarginSelected(true, beg, end));
}
-void Row::setSelectionAndMargins(DocIterator const & beg,
- DocIterator const & end) const
+void Row::clearSelectionAndMargins() const
{
- setSelection(beg.pos(), end.pos());
-
- if (selection()) {
- end_margin_sel = isMarginSelected(false, beg, end);
- begin_margin_sel = isMarginSelected(true, beg, end);
- }
+ change(sel_beg, -1);
+ change(sel_end, -1);
+ change(end_margin_sel, false);
+ change(begin_margin_sel, false);
}
void Row::setSelection(pos_type beg, pos_type end) const
{
if (pos_ >= beg && pos_ <= end)
- sel_beg = pos_;
+ change(sel_beg, pos_);
else if (beg > pos_ && beg <= end_)
- sel_beg = beg;
+ change(sel_beg, beg);
else
- sel_beg = -1;
+ change(sel_beg, -1);
if (end_ >= beg && end_ <= end)
- sel_end = end_;
+ change(sel_end,end_);
else if (end < end_ && end >= pos_)
- sel_end = end;
+ change(sel_end, end);
else
- sel_end = -1;
+ change(sel_end, -1);
}
case Row::SPACE:
os << "SPACE: ";
break;
+ case Row::INVALID:
+ os << "INVALID: ";
+ break;
}
os << "width=" << e.full_width();
return os;
<< " ascent: " << row.dim_.asc
<< " descent: " << row.dim_.des
<< " separator: " << row.separator
- << " label_hfill: " << row.label_hfill
+ << " label_hfill: " << row.label_hfill
<< " row_boundary: " << row.right_boundary() << "\n";
double x = row.left_margin;
Row::Elements::const_iterator it = row.elements_.begin();
x += cit->full_width();
++cit;
}
- return int(x + 0.5);
+ return support::iround(x);
}
else
break;
}
- return int(x + 0.5);
+ return support::iround(x);
}
// amount of expansion: number of expanders time the em value for each
// string element
int exp_amount = 0;
- for (Row::Element const & e : elements_)
+ for (Element const & e : elements_)
exp_amount += e.expansionAmount();
if (!exp_amount)
return false;
// do not stretch more than MAX_SPACE_STRETCH em per expander
return false;
// add extra length to each element proportionally to its em.
- for (Row::Element & e : elements_)
- if (e.type == Row::STRING)
+ for (Element & e : elements_)
+ if (e.type == STRING)
e.setExtra(extra_per_em);
// update row dimension
dim_.wid += w;
if (elt.final)
return;
elt.final = true;
+ if (elt.change.changed())
+ changebar_ = true;
if (elt.type == STRING) {
dim_.wid -= elt.dim.wid;
void Row::add(pos_type const pos, Inset const * ins, Dimension const & dim,
- Font const & f, Change const & ch)
+ Font const & f, Change const & ch)
{
finalizeLast();
Element e(INSET, pos, f, ch);
e.inset = ins;
e.dim = dim;
+ e.row_flags = ins->rowFlags();
elements_.push_back(e);
dim_.wid += dim.wid;
+ changebar_ |= ins->isChanged();
}
void Row::add(pos_type const pos, char_type const c,
- Font const & f, Change const & ch)
+ Font const & f, Change const & ch, bool can_break)
{
if (!sameString(f, ch)) {
finalizeLast();
Element e(STRING, pos, f, ch);
+ e.row_flags = can_break ? CanBreakInside : Inline;
elements_.push_back(e);
}
if (back().str.length() % 30 == 0) {
e.dim.wid = theFontMetrics(f).width(s);
dim_.wid += e.dim.wid;
e.endpos = pos;
+ // Copy after* flags from previous elements, forbid break before element
+ int const prev_row_flags = elements_.empty() ? Inline : elements_.back().row_flags;
+ int const can_inherit = AfterFlags & ~AlwaysBreakAfter;
+ e.row_flags = (prev_row_flags & can_inherit) | NoBreakBefore;
elements_.push_back(e);
finalizeLast();
}
}
+void Row::push_back(Row::Element const & e)
+{
+ dim_.wid += e.dim.wid;
+ elements_.push_back(e);
+}
+
+
void Row::pop_back()
{
dim_.wid -= elements_.back().dim.wid;
}
-bool Row::shortenIfNeeded(pos_type const keep, int const w, int const next_width)
+bool Row::shortenIfNeeded(int const w, int const next_width)
{
if (empty() || width() <= w)
return false;
--cit_brk;
// make a copy of the element to work on it.
Element brk = *cit_brk;
+ /* If the current element is an inset that allows breaking row
+ * after itself, and if the row is already short enough after
+ * this inset, then cut right after this element.
+ */
+ if (wid_brk <= w && brk.row_flags & CanBreakAfter) {
+ end_ = brk.endpos;
+ dim_.wid = wid_brk;
+ elements_.erase(cit_brk + 1, end);
+ return true;
+ }
+ // assume now that the current element is not there
wid_brk -= brk.dim.wid;
- if (brk.countSeparators() == 0 || brk.pos < keep)
- continue;
+ /*
+ * Some Asian languages split lines anywhere (no notion of
+ * word). It seems that QTextLayout is not aware of this fact.
+ * See for reference:
+ * https://en.wikipedia.org/wiki/Line_breaking_rules_in_East_Asian_languages
+ *
+ * FIXME: Something shall be done about characters which are
+ * not allowed at the beginning or end of line.
+ */
+ bool const word_wrap = brk.font.language()->wordWrap();
/* We have found a suitable separable element. This is the common case.
* Try to break it cleanly (at word boundary) at a length that is both
* - less than the available space on the row
* - shorter than the natural width of the element, in order to enforce
* break-up.
*/
- if (brk.breakAt(min(w - wid_brk, brk.dim.wid - 2), false)) {
+ if (brk.breakAt(min(w - wid_brk, brk.dim.wid - 2), !word_wrap)) {
/* if this element originally did not cause a row overflow
* in itself, and the remainder of the row would still be
* too large after breaking, then we will have issues in
&& !begin()->isVirtual()))
return begin();
- Row::const_iterator cit = begin();
+ const_iterator cit = begin();
for ( ; cit != end() ; ++cit) {
- /** Look whether the cursor is inside the element's
- * span. Note that it is necessary to take the
- * boundary into account, and to accept virtual
- * elements, which have pos == endpos.
+ /** Look whether the cursor is inside the element's span. Note
+ * that it is necessary to take the boundary into account, and
+ * to accept virtual elements, in which case the position
+ * will be before the virtual element.
*/
- if (pos + boundary_corr >= cit->pos
- && (pos + boundary_corr < cit->endpos || cit->isVirtual())) {
- x += cit->pos2x(pos);
- break;
+ if (cit->isVirtual() && pos + boundary_corr == cit->pos)
+ break;
+ else if (pos + boundary_corr >= cit->pos
+ && pos + boundary_corr < cit->endpos) {
+ x += cit->pos2x(pos);
+ break;
}
x += cit->full_width();
}
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