+ /*
+ We use two vectors to keep track of loose column spacing:
+ clique_spacing keeps track of ideal spaces.
+ clique_tight_spacing keeps track of minimum spaces.
+ Below, a scale factor is applied to the shifting of loose columns that
+ aims to preserve clique_spacing but gets closer to clique_tight_spacing as the
+ space becomes smaller. This is used because the rods placed for loose columns
+ are tight (meaning they use minimum distances - see set_distances_for_loose_columns).
+ However, other rods may widen this distance, in which case we don't want a crammed score.
+ Thus, we aim for non-crammed, and fall back on crammed as needed.
+ */
+ vector<Real> clique_spacing;
+ vector<Real> clique_tight_spacing;
+ clique_spacing.push_back (0.0);
+ clique_tight_spacing.push_back (0.0);
+ for (vsize j = 1; j + 1 < clique.size (); j++)
+ {
+ Grob *clique_col = clique[j];
+
+ Paper_column *loose_col = dynamic_cast<Paper_column *> (clique[j]);
+ Paper_column *next_col = dynamic_cast<Paper_column *> (clique[j + 1]);
+
+ Grob *spacing = unsmob<Grob> (clique_col->get_object ("spacing"));
+ if (Grob *grace_spacing = unsmob<Grob> (clique_col->get_object ("grace-spacing")))
+ {
+ spacing = grace_spacing;
+ }
+
+ Spacing_options options;
+ if (spacing)
+ options.init_from_grob (spacing);
+ else
+ programming_error ("Column without spacing object");
+
+ Real base_note_space = 0.0;
+ Real tight_note_space = 0.0;
+
+ if (Paper_column::is_musical (next_col)
+ && Paper_column::is_musical (loose_col))
+ {
+ Spring spring = Spacing_spanner::note_spacing (spacing, loose_col,
+ next_col, &options);
+ if (has_interface<Note_spacing> (spacing))
+ spring = Note_spacing::get_spacing (spacing, next_col,
+ spring, options.increment_);
+
+ base_note_space = spring.distance ();
+ tight_note_space = spring.min_distance ();
+ }
+ else
+ {
+ Spring spring = Spacing_spanner::standard_breakable_column_spacing (spacing,
+ loose_col, next_col,
+ &options);
+
+ base_note_space = spring.distance ();
+ tight_note_space = spring.min_distance ();
+ }
+
+ Real loose_col_horizontal_length = loose_col->extent (loose_col, X_AXIS).length ();
+ base_note_space = max (base_note_space, loose_col_horizontal_length);
+ tight_note_space = max (tight_note_space, loose_col_horizontal_length);
+
+ clique_spacing.push_back (base_note_space);
+ clique_tight_spacing.push_back (tight_note_space);
+ }
+
+ Real permissible_distance = clique.back ()->relative_coordinate (common, X_AXIS) - robust_relative_extent (clique[0], common, X_AXIS)[RIGHT];
+ Real right_point = robust_relative_extent (clique.back (), common, X_AXIS)[LEFT];
+ Grob *finished_right_column = clique.back ();
+
+ Real sum_tight_spacing = 0;
+ Real sum_spacing = 0;
+ // currently a magic number - what would be a good grob to hold this property?
+ Real left_padding = 0.15;
+ for (vsize j = 0; j < clique_spacing.size (); j++)
+ {
+ sum_tight_spacing += clique_tight_spacing[j];
+ sum_spacing += clique_spacing[j];
+ }
+ Real scale_factor = max (0.0, min (1.0, (permissible_distance - left_padding - sum_tight_spacing) / (sum_spacing - sum_tight_spacing)));
+ for (vsize j = clique.size () - 2; j > 0; j--)
+ {
+ Paper_column *clique_col = dynamic_cast<Paper_column *> (clique[j]);