/*
- page-breaking.hh -- declare a superclass and utility
- functions for several different page-breaking algorithms
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 2006--2010 Joe Neeman <joeneeman@gmail.com>
- (c) 2006--2007 Joe Neeman <joeneeman@gmail.com>
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef PAGE_BREAKING_HH
struct Break_position
{
/*
- index in system_spec_index_, if VPOS start of book.
+ index into system_specs_, if this is VPOS, the Break_position represents the
+ start of the book.
*/
vsize system_spec_index_;
- /* if system_spec_index_ is a score, then we start at the score_brk_'th possible
- page-break in the score */
+ /* if system_spec_index_ indexes a score, then we start at the score_brk_'th
+ possible page-break in the score */
vsize score_break_;
- /* if system_spec_index_ is a score, this points to the broken column */
+ /* if system_spec_index_ indexes a score, this points to the broken column */
Grob *col_;
bool score_ender_;
+ /* if non-zero, this is the (fixed, uncompressed) number of lines between
+ this Break_position and the previous. */
+ int forced_line_count_;
+
Break_position (vsize s=VPOS, vsize brk=VPOS, Grob *g=NULL, bool end=false)
{
system_spec_index_ = s;
score_break_ = brk;
col_ = g;
score_ender_ = end;
+ forced_line_count_ = 0;
}
/*
{
public:
typedef bool (*Break_predicate) (Grob *);
+ typedef bool (*Prob_break_predicate) (Prob *);
typedef vector<vsize> Line_division;
/*
*/
virtual SCM solve () = 0;
- Page_breaking (Paper_book *pb, Break_predicate);
+ Page_breaking (Paper_book *pb, Break_predicate, Prob_break_predicate);
virtual ~Page_breaking ();
bool ragged () const;
bool ragged_last () const;
bool is_last () const;
+ bool ends_score () const;
+ int systems_per_page () const;
+ int max_systems_per_page () const;
+ int min_systems_per_page () const;
Real page_height (int page_number, bool last) const;
+ Real paper_height () const;
+ vsize system_count () const;
+ Real line_count_penalty (int line_count) const;
+ int line_count_status (int line_count) const;
+ bool too_many_lines (int line_count) const;
+ bool too_few_lines (int line_count) const;
+ Real min_whitespace_at_top_of_page (Line_details const&) const;
+ Real min_whitespace_at_bottom_of_page (Line_details const&) const;
+ int orphan_penalty () const;
protected:
Paper_book *book_;
vsize current_configuration_count () const;
Line_division current_configuration (vsize configuration_index) const;
Page_spacing_result space_systems_on_n_pages (vsize configuration_index,
- vsize n, vsize first_page_num);
+ vsize n, vsize first_page_num);
Page_spacing_result space_systems_on_n_or_one_more_pages (vsize configuration_index, vsize n,
- vsize first_page_num);
+ vsize first_page_num,
+ Real penalty_for_fewer_pages);
Page_spacing_result space_systems_on_best_pages (vsize configuration_index,
- vsize first_page_num);
+ vsize first_page_num);
+ Page_spacing_result space_systems_with_fixed_number_per_page (vsize configuration_index,
+ vsize first_page_num);
+ Page_spacing_result pack_systems_on_least_pages (vsize configuration_index,
+ vsize first_page_num);
vsize min_page_count (vsize configuration_index, vsize first_page_num);
bool all_lines_stretched (vsize configuration_index);
Real blank_page_penalty () const;
vector<Constrained_breaking> line_breaking_;
bool ragged_;
bool ragged_last_;
+ int systems_per_page_;
+ int max_systems_per_page_;
+ int min_systems_per_page_;
+ vsize system_count_;
+ int orphan_penalty_;
vector<Line_division> current_configurations_;
vector<Break_position> current_chunks_;
vsize current_end_breakpoint_;
void cache_line_details (vsize configuration_index);
+ void compute_line_heights ();
void clear_line_details_cache ();
vsize cached_configuration_index_;
vector<Line_details> cached_line_details_;
vector<Line_details> uncompressed_line_details_;
+ Real paper_height_;
+ mutable vector<Real> page_height_cache_;
+ mutable vector<Real> last_page_height_cache_;
+
vector<Break_position> chunk_list (vsize start, vsize end);
Line_division system_count_bounds (vector<Break_position> const &chunks, bool min);
void line_breaker_args (vsize i,
Page_spacing_result space_systems_on_2_pages (vsize configuration_index, vsize first_page_num);
Page_spacing_result finalize_spacing_result (vsize configuration_index, Page_spacing_result);
void create_system_list ();
- void find_chunks_and_breaks (Break_predicate);
- void uncompress_page_spacing_results (Page_spacing_result*);
+ void find_chunks_and_breaks (Break_predicate, Prob_break_predicate);
+ SCM make_page (int page_num, bool last) const;
+ SCM get_page_configuration (SCM systems, int page_num, bool ragged, bool last);
+ SCM draw_page (SCM systems, SCM config, int page_num, bool last);
};
#endif /* PAGE_BREAKING_HH */
projects / lilypond.git / blobdiff