/*
- 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--2011 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
{
- vsize sys_; /* our index in the all_ list */
- vsize score_break_; /* if sys_ is a score, then we start at the score_brk_'th
- possible page-break in the score */
- Grob *col_; /* if sys_ is a score, this points to the broken column */
+ /*
+ 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_ indexes a score, then we start at the score_brk_'th
+ possible page-break in the score */
+ vsize score_break_;
+
+ /* 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)
{
- sys_ = s;
+ system_spec_index_ = s;
score_break_ = brk;
col_ = g;
score_ender_ = end;
+ forced_line_count_ = 0;
}
+ /*
+ lexicographic in (system_spec_index_, score_break_)
+ */
bool operator< (const Break_position &other)
{
- return (sys_ == VPOS && other.sys_ != VPOS)
- || (sys_ < other.sys_)
- || (sys_ == other.sys_ && score_break_ < other.score_break_);
+ return (system_spec_index_ == VPOS && other.system_spec_index_ != VPOS)
+ || (system_spec_index_ < other.system_spec_index_)
+ || (system_spec_index_ == other.system_spec_index_ && score_break_ < other.score_break_);
}
bool operator<= (const Break_position &other)
{
- return (sys_ == VPOS)
- || (sys_ < other.sys_ && other.sys_ != VPOS)
- || (sys_ == other.sys_ && score_break_ <= other.score_break_);
+ return (system_spec_index_ == VPOS)
+ || (system_spec_index_ < other.system_spec_index_ && other.system_spec_index_ != VPOS)
+ || (system_spec_index_ == other.system_spec_index_ && score_break_ <= other.score_break_);
}
};
{
public:
typedef bool (*Break_predicate) (Grob *);
+ typedef bool (*Prob_break_predicate) (Prob *);
typedef vector<vsize> Line_division;
+
+ /*
+ TODO: naming.
+
+ determine the page breaking, and break scores into lines
+ appropriately.
+ */
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 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 footnote_separator_stencil_height () const;
+ Real footnote_padding () const;
+ Real footnote_number_raise () const;
+ Real footnote_footer_padding () 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_;
void break_into_pieces (vsize start, vsize end, Line_division const &div);
SCM systems ();
+ SCM footnotes ();
void set_current_breakpoints (vsize start,
vsize end,
vsize system_count,
Line_division lower_bound = Line_division (),
Line_division upper_bound = Line_division ());
+ void set_to_ideal_line_configuration (vsize start, vsize end);
+
vsize current_configuration_count () const;
Line_division current_configuration (vsize configuration_index) const;
- Spacing_result space_systems_on_n_pages (vsize configuration_index, vsize n, vsize first_page_num);
- Spacing_result space_systems_on_n_or_one_more_pages (vsize configuration_index, vsize n, vsize first_page_num);
- Spacing_result space_systems_on_best_pages (vsize configuration_index, vsize first_page_num);
+ Page_spacing_result space_systems_on_n_pages (vsize configuration_index,
+ 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,
+ Real penalty_for_fewer_pages);
+ Page_spacing_result space_systems_on_best_pages (vsize configuration_index,
+ 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;
SCM breakpoint_property (vsize breakpoint, char const *str);
- vector<Break_position> breaks_;
+ vsize last_break_position () const;
private:
+ vector<Break_position> breaks_;
vector<Break_position> chunks_;
- vector<System_spec> all_;
+ vector<System_spec> system_specs_;
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_;
+ Real footnote_separator_stencil_height_;
+ Real footnote_padding_;
+ Real footnote_number_raise_;
+ Real footnote_footer_padding_;
+ 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);
Line_division *cur);
vector<Line_details> line_details (vsize start, vsize end, Line_division const &div);
- Spacing_result space_systems_on_1_page (vector<Line_details> const &lines, Real page_height, bool ragged);
- Spacing_result space_systems_on_2_pages (vsize configuration_index, vsize first_page_num);
- Spacing_result finalize_spacing_result (vsize configuration_index, Spacing_result);
+ Page_spacing_result space_systems_on_1_page (vector<Line_details> const &lines, Real page_height, bool ragged);
+ 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 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, int footnote_count, bool ragged, bool last);
+ SCM draw_page (SCM systems, SCM config, int page_num, int footnote_num, bool last);
};
#endif /* PAGE_BREAKING_HH */
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