X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Finclude%2Fpage-breaking.hh;h=acf6bac51ce43e9d9a11263994c2deabb8eebd03;hb=54b02666750062788185bd3f99e644d621e348c2;hp=23ffbd807ec0df559a3b13c56e6c13fb6da5ad43;hpb=9cada1c1aa1666beb1895a31c95671f7cc32c205;p=lilypond.git diff --git a/lily/include/page-breaking.hh b/lily/include/page-breaking.hh index 23ffbd807e..acf6bac51c 100644 --- a/lily/include/page-breaking.hh +++ b/lily/include/page-breaking.hh @@ -1,10 +1,20 @@ /* - 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 - (c) 2006--2007 Joe Neeman + 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 . */ #ifndef PAGE_BREAKING_HH @@ -41,32 +51,48 @@ struct System_spec 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_); } }; @@ -74,16 +100,41 @@ class Page_breaking { public: typedef bool (*Break_predicate) (Grob *); + typedef bool (*Prob_break_predicate) (Prob *); typedef vector 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_; @@ -98,30 +149,51 @@ protected: 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 breaks_; + vsize last_break_position () const; private: + vector breaks_; vector chunks_; - vector all_; + vector system_specs_; vector 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 current_configurations_; vector current_chunks_; @@ -129,9 +201,15 @@ private: 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 cached_line_details_; + vector uncompressed_line_details_; + + Real paper_height_; + mutable vector page_height_cache_; + mutable vector last_page_height_cache_; vector chunk_list (vsize start, vsize end); Line_division system_count_bounds (vector const &chunks, bool min); @@ -147,10 +225,13 @@ private: Line_division *cur); vector line_details (vsize start, vsize end, Line_division const &div); - Spacing_result space_systems_on_1_page (vector 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 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 */