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Get rid of need_new_row boolean in breakParagraph
Instead of having breakParagraph decide when breaking a row is necessary, let Row::shortenIfNeeded set the row_flag of the last element to request a row break. This was already done in splitAt. This is in preparation of splitAt splitting in more than two elements.
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@ -473,6 +473,8 @@ Row::Elements splitFrom(Row::Elements & elts, Row::Elements::iterator const & it
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ret.push_back(init);
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ret.insert(ret.end(), it, elts.end());
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elts.erase(it, elts.end());
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if (!elts.empty())
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elts.back().row_flags = (elts.back().row_flags & ~AfterFlags) | BreakAfter;
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return ret;
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}
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@ -1042,6 +1042,7 @@ bool operator==(flexible_const_iterator<T> const & t1,
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return t1.cit_ == t2.cit_ && t1.pile_.empty() && t2.pile_.empty();
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}
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Row newRow(TextMetrics const & tm, pit_type pit, pos_type pos, bool is_rtl)
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{
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Row nrow;
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@ -1071,6 +1072,7 @@ void cleanupRow(Row & row, pos_type pos, pos_type real_endpos, bool is_rtl)
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row.reverseRTL(is_rtl);
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}
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// Implement the priorities described in RowFlags.h.
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bool needsRowBreak(int f1, int f2)
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{
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@ -1093,14 +1095,12 @@ RowList TextMetrics::breakParagraph(Row const & bigrow) const
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bool const is_rtl = text_->isRTL(bigrow.pit());
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bool const end_label = text_->getEndLabel(bigrow.pit()) != END_LABEL_NO_LABEL;
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bool need_new_row = true;
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pos_type pos = 0;
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int width = 0;
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flexible_const_iterator<Row> fcit = flexible_begin(bigrow);
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flexible_const_iterator<Row> const end = flexible_end(bigrow);
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while (true) {
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bool const has_row = !rows.empty();
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bool const row_empty = !has_row || rows.back().empty();
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bool const row_empty = rows.empty() || rows.back().empty();
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// The row flags of previous element, if there is one.
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// Otherwise we use NoBreakAfter to avoid an empty row before
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// e.g. a displayed equation.
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@ -1110,14 +1110,12 @@ RowList TextMetrics::breakParagraph(Row const & bigrow) const
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// paragraph has an end label (for which an empty row is OK).
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int const f2 = (fcit == end) ? (end_label ? Inline : NoBreakBefore)
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: fcit->row_flags;
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need_new_row |= needsRowBreak(f1, f2);
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if (need_new_row) {
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if (rows.empty() || needsRowBreak(f1, f2)) {
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if (!rows.empty())
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cleanupRow(rows.back(), pos, bigrow.endpos(), is_rtl);
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rows.push_back(newRow(*this, bigrow.pit(), pos, is_rtl));
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// the width available for the row.
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width = max_width_ - rows.back().right_margin;
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need_new_row = false;
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}
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// The stopping condition is here because we may need a new
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@ -1147,7 +1145,6 @@ RowList TextMetrics::breakParagraph(Row const & bigrow) const
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if (!next_elts.empty()) {
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rb.flushed(false);
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fcit.put(next_elts);
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need_new_row = true;
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}
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} else {
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// a new element in the row
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@ -1163,7 +1160,6 @@ RowList TextMetrics::breakParagraph(Row const & bigrow) const
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// do as if we inserted this element in the original row
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if (!next_elt.str.empty())
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fcit.put(next_elt);
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need_new_row = true;
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}
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}
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}
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