+ostream & operator<<(ostream & os, Row::Element const & e)
+{
+ if (e.font.isVisibleRightToLeft())
+ os << e.endpos << "<<" << e.pos << " ";
+ else
+ os << e.pos << ">>" << e.endpos << " ";
+
+ switch (e.type) {
+ case Row::STRING:
+ os << "STRING: `" << to_utf8(e.str) << "', ";
+ break;
+ case Row::VIRTUAL:
+ os << "VIRTUAL: `" << to_utf8(e.str) << "', ";
+ break;
+ case Row::INSET:
+ os << "INSET: " << to_utf8(e.inset->layoutName()) << ", ";
+ break;
+ case Row::SEPARATOR:
+ os << "SEPARATOR: extra=" << e.extra << ", ";
+ break;
+ case Row::SPACE:
+ os << "SPACE: ";
+ break;
+ }
+ os << "width=" << e.full_width();
+ return os;
+}
+
+
+ostream & operator<<(ostream & os, Row const & row)
+{
+ os << " pos: " << row.pos_ << " end: " << row.end_
+ << " left_margin: " << row.left_margin
+ << " width: " << row.dim_.wid
+ << " right_margin: " << row.right_margin
+ << " ascent: " << row.dim_.asc
+ << " descent: " << row.dim_.des
+ << " separator: " << row.separator
+ << " label_hfill: " << row.label_hfill
+ << " row_boundary: " << row.right_boundary() << "\n";
+ double x = row.left_margin;
+ Row::Elements::const_iterator it = row.elements_.begin();
+ for ( ; it != row.elements_.end() ; ++it) {
+ os << "x=" << x << " => " << *it << endl;
+ x += it->full_width();
+ }
+ return os;
+}
+
+
+bool Row::sameString(Font const & f, Change const & ch) const
+{
+ if (elements_.empty())
+ return false;
+ Element const & elt = elements_.back();
+ return elt.type == STRING && !elt.final
+ && elt.font == f && elt.change == ch;
+}
+
+
+void Row::finalizeLast()
+{
+ if (elements_.empty())
+ return;
+ Element & elt = elements_.back();
+ if (elt.final)
+ return;
+ elt.final = true;
+
+ if (elt.type == STRING) {
+ elt.dim.wid = theFontMetrics(elt.font).width(elt.str);
+ dim_.wid += elt.dim.wid;
+ }
+}
+
+
+void Row::add(pos_type const pos, Inset const * ins, Dimension const & dim,
+ Font const & f, Change const & ch)
+{
+ finalizeLast();
+ Element e(INSET, pos, f, ch);
+ e.inset = ins;
+ e.dim = dim;
+ elements_.push_back(e);
+ dim_.wid += dim.wid;
+}
+
+
+void Row::add(pos_type const pos, char_type const c,
+ Font const & f, Change const & ch)
+{
+ if (!sameString(f, ch)) {
+ finalizeLast();
+ Element e(STRING, pos, f, ch);
+ elements_.push_back(e);
+ }
+ back().str += c;
+ back().endpos = pos + 1;
+}
+
+
+void Row::addVirtual(pos_type const pos, docstring const & s,
+ Font const & f, Change const & ch)
+{
+ finalizeLast();
+ Element e(VIRTUAL, pos, f, ch);
+ e.str = s;
+ e.dim.wid = theFontMetrics(f).width(s);
+ dim_.wid += e.dim.wid;
+ e.endpos = pos;
+ elements_.push_back(e);
+ finalizeLast();
+}
+
+
+void Row::addSeparator(pos_type const pos, char_type const c,
+ Font const & f, Change const & ch)
+{
+ finalizeLast();
+ Element e(SEPARATOR, pos, f, ch);
+ e.str += c;
+ e.dim.wid = theFontMetrics(f).width(c);
+ elements_.push_back(e);
+ dim_.wid += e.dim.wid;
+}
+
+
+void Row::addSpace(pos_type const pos, int const width,
+ Font const & f, Change const & ch)
+{
+ finalizeLast();
+ Element e(SPACE, pos, f, ch);
+ e.dim.wid = width;
+ elements_.push_back(e);
+ dim_.wid += e.dim.wid;
+}
+
+
+void Row::pop_back()
+{
+ dim_.wid -= elements_.back().dim.wid;
+ elements_.pop_back();
+}
+
+
+void Row::shortenIfNeeded(pos_type const keep, int const w)
+{
+ if (empty() || width() <= w)
+ return;
+
+ Elements::iterator const beg = elements_.begin();
+ Elements::iterator const end = elements_.end();
+ Elements::iterator last_sep = elements_.end();
+ int last_width = 0;
+ int wid = left_margin;
+
+ Elements::iterator cit = beg;
+ for ( ; cit != end ; ++cit) {
+ if (cit->type == SEPARATOR && cit->pos >= keep) {
+ last_sep = cit;
+ last_width = wid;
+ }
+ if (wid + cit->dim.wid > w)
+ break;
+ wid += cit->dim.wid;
+ }
+
+ if (last_sep != end) {
+ // We have found a suitable separator. This is the
+ // common case.
+ end_ = last_sep->endpos;
+ dim_.wid = last_width;
+ elements_.erase(last_sep, end);
+ return;
+ }
+
+ if (cit == end) {
+ // This should not happen since the row is too long.
+ LYXERR0("Something is wrong cannot shorten row: " << *this);
+ return;
+ }
+
+ if (cit != beg && cit->type == VIRTUAL) {
+ // It is not possible to separate a virtual element from the
+ // previous one.
+ --cit;
+ wid -= cit->dim.wid;
+ }
+
+ if (cit != beg) {
+ // There is no separator, but several elements (probably
+ // insets) have been added. We can cut at this place.
+ end_ = cit->pos;
+ dim_.wid = wid;
+ elements_.erase(cit, end);
+ return;
+ }
+
+ /* If we are here, it means that we have not found a separator
+ * to shorten the row. There is one case where we can do
+ * something: when we have one big string, maybe with some
+ * other things after it.
+ */
+ if (cit->breakAt(w - left_margin)) {
+ end_ = cit->endpos;
+ dim_.wid = left_margin + cit->dim.wid;
+ // If there are other elements, they should be removed.
+ elements_.erase(boost::next(cit), end);
+ }
+}
+
+
+void Row::reverseRTL(bool const rtl_par)
+{
+ pos_type i = 0;
+ pos_type const end = elements_.size();
+ while (i < end) {
+ // gather a sequence of elements with the same direction
+ bool const rtl = elements_[i].font.isVisibleRightToLeft();
+ pos_type j = i;
+ while (j < end && elements_[j].font.isVisibleRightToLeft() == rtl)
+ ++j;
+ // if the direction is not the same as the paragraph
+ // direction, the sequence has to be reverted.
+ if (rtl != rtl_par)
+ reverse(elements_.begin() + i, elements_.begin() + j);
+ i = j;
+ }
+ // If the paragraph itself is RTL, reverse everything
+ if (rtl_par)
+ reverse(elements_.begin(), elements_.end());
+}
+