source file of the GNU LilyPond music typesetter
- (c) 2006--2007 Joe Neeman <joeneeman@gmail.com>
+ (c) 2006--2009 Joe Neeman <joeneeman@gmail.com>
*/
#ifndef CONSTRAINED_BREAKING_HH
#include "prob.hh"
struct Line_details {
+ Grob *last_column_;
Real force_;
Interval extent_; /* Y-extent of the system */
- Real padding_; /* compulsory space after this system (if we're not last on a page) */
+
+ Real padding_; /* compulsory space after this system (if we're not
+ last on a page) */
+ Real title_padding_;
Real bottom_padding_;
Real space_; /* spring length */
Real inverse_hooke_;
Real page_penalty_;
Real turn_penalty_;
+ bool title_;
+
+ /* The page-breaker deals with forbidden page breaks by "compressing"
+ two Line_detailses into one. The following fields are used by the
+ page-breaker to keep track of this. If the number of fields needed
+ by the page-breaker grows, it might be a good idea to create a separate
+ class. */
+ int compressed_lines_count_;
+ int compressed_nontitle_lines_count_;
+
Line_details ()
{
+ last_column_ = 0;
force_ = infinity_f;
padding_ = 0;
+ title_padding_ = 0;
bottom_padding_ = 0;
space_ = 0;
inverse_hooke_ = 1;
break_penalty_ = 0;
page_penalty_ = 0;
turn_penalty_ = 0;
+ title_ = false;
+ compressed_lines_count_ = 1;
+ compressed_nontitle_lines_count_ = 1;
}
- Line_details (Prob *pb)
- {
- force_ = 0;
- extent_ = unsmob_stencil (pb->get_property ("stencil")) ->extent (Y_AXIS);
- padding_ = 0;
- bottom_padding_ = 0;
- space_ = 1.0;
- inverse_hooke_ = 1.0;
- break_permission_ = ly_symbol2scm ("allow");
- page_permission_ = pb->get_property ("page-break-permission");
- turn_permission_ = pb->get_property ("page-turn-permission");
- break_penalty_ = 0;
- page_penalty_ = robust_scm2double (pb->get_property ("page-break-penalty"), 0);
- turn_penalty_ = robust_scm2double (pb->get_property ("page-turn-penalty"), 0);
- }
+ Line_details (Prob *pb, Output_def *paper);
};
/*
vsize systems_;
bool ragged_right_;
bool ragged_last_;
+ Real between_system_space_;
+ Real before_title_padding_;
+ Real between_system_padding_;
/* the (i,j)th entry is the configuration for breaking between
columns i and j */
Real combine_demerits (Real force, Real prev_force);
- bool calc_subproblem(vsize start, vsize systems, vsize max_break_index);
+ bool calc_subproblem (vsize start, vsize systems, vsize max_break_index);
+ void fill_line_details (Line_details *const, vsize, vsize);
};
#endif /* CONSTRAINED_BREAKING_HH */