2 break-algorithm.hh -- declare Break_algorithm
4 source file of the GNU LilyPond music typesetter
6 (c) 1996--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
14 #include "interval.hh"
15 #include "lily-proto.hh"
16 #include "column-x-positions.hh"
19 /** Class representation of an algorithm which decides where to put
20 the column, and where to break lines.
25 class Break_algorithm {
27 Paper_score *pscore_l_;
30 /// search all pcols which are breakable.
31 Link_array<Score_element> find_breaks() const;
33 Array<int> find_break_indices() const;
36 /// helper: solve for the columns in #curline#.
37 void solve_line (Column_x_positions*) const;
39 /// does curline fit on the paper?
40 bool feasible (Link_array<Score_element>) const;
43 Simple_spacer* generate_spacing_problem (Link_array<Score_element>, Interval) const;
45 virtual Array<Column_x_positions> do_solve() const=0;
48 Simple_spacer* (*get_line_spacer)();
50 void set_pscore (Paper_score*);
52 Array<Column_x_positions> solve() const;