source file of the GNU LilyPond music typesetter
- (c) 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1999--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#define SIMPLE_SPACER_HH
#include "parray.hh"
-#include "line-spacer.hh"
+#include "lily-proto.hh"
struct Spring_description
{
- Real ideal_f_;
- Real hooke_f_;
+ Real ideal_;
+ Real hooke_;
bool active_b_;
- Real block_force_f_;
+ Real block_force_;
Real length (Real force) const;
Spring_description ();
- Real energy_f (Real) const;
-};
-
-/**
- A simple spacing constraint solver. The approach:
-
- Stretch the line uniformly until none of the constraints (rods)
- block. It then is very wide.
-
-
- Compress until the next constraint blocks,
-
- Mark the springs over the constrained part to be non-active.
-
- Repeat with the smaller set of non-active constraints, until all
- constraints blocked, or until the line is as short as desired.
-
- This is much simpler, and much much faster than full scale
- Constrained QP. On the other hand, a situation like this will not
- be typeset as dense as possible, because
-
- c4 c4 c4 c4
- veryveryverylongsyllable2 veryveryverylongsyllable2
- " "4 veryveryverylongsyllable2 syllable4
-
-
- can be further compressed to
-
-
- c4 c4 c4 c4
- veryveryverylongsyllable2 veryveryverylongsyllable2
- " "4 veryveryverylongsyllable2 syllable4
+ bool sane_b () const;
+};
- Perhaps this is not a bad thing, because the 1st looks better anyway. */
-struct Simple_spacer: public Line_spacer
+struct Simple_spacer
{
Array<Spring_description> springs_;
- Real force_f_;
-
+ Link_array<Grob> spaced_cols_;
+ Link_array<Grob> loose_cols_;
+ Real force_;
+ Real indent_;
+ Real line_len_;
+ Real default_space_;
+ int active_count_;
+ bool compression_penalty_b_;
+
Simple_spacer ();
- virtual void solve (Column_x_positions *) const;
- virtual void lower_bound_solution (Column_x_positions *) const;
- virtual void add_columns (Link_array<Paper_column>);
-
+ void solve (Column_x_positions *, bool);
+ void add_columns (Link_array<Grob>const &);
void my_solve_linelen ();
void my_solve_natural_len ();
Real active_springs_stiffness () const;
Real active_blocking_force ()const;
Real configuration_length ()const;
void set_active_states ();
- Real energy_f () const;
-
bool active_b () const;
};