/*
- optimal-page-breaking.cc -- implement a page-breaker that
- will break pages in such a way that both horizontal and
- vertical spacing will be acceptable
+ 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--2009 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/>.
*/
#include "international.hh"
return false;
}
-// FIXME: divide the page breaking into subproblems wherever there is a page break.
-// This will allow us to tweak line-breaking independently on both sides of a
-// page break (currently, we only get to request a number of systems for an entire score
-// at a time), which is necessary for min-systems-per-page and \pageBreak to interact
-// correctly.
Optimal_page_breaking::Optimal_page_breaking (Paper_book *pb)
: Page_breaking (pb, is_break)
{
{
}
+extern bool debug_page_breaking_scoring;
+
SCM
Optimal_page_breaking::solve ()
{
vsize end = last_break_position ();
vsize max_sys_count = max_system_count (0, end);
vsize first_page_num = robust_scm2int (book_->paper_->c_variable ("first-page-number"), 1);
- SCM forced_page_count = book_->paper_->c_variable ("page-count");
set_to_ideal_line_configuration (0, end);
Page_spacing_result best;
+ SCM forced_page_count = book_->paper_->c_variable ("page-count");
vsize page_count = robust_scm2int (forced_page_count, 1);
Line_division ideal_line_division = current_configuration (0);
Line_division best_division = ideal_line_division;
Page_spacing_result best_for_this_sys_count;
set_current_breakpoints (0, end, sys_count, Line_division (), bound);
+ if (debug_page_breaking_scoring)
+ message (_f ("trying %d systems", (int)sys_count));
+
for (vsize i = 0; i < current_configuration_count (); i++)
{
vsize min_p_count = min_page_count (i, first_page_num);
if (min_p_count == page_count || scm_is_integer (forced_page_count))
cur = space_systems_on_n_pages (i, page_count, first_page_num);
else
- cur = space_systems_on_n_or_one_more_pages (i, page_count-1, first_page_num);
+ cur = space_systems_on_n_or_one_more_pages (i, page_count-1, first_page_num, 0);
if (cur.demerits_ < best_for_this_sys_count.demerits_)
{
}
}
+ if (debug_page_breaking_scoring)
+ message (_f ("best score for this sys-count: %f", best_for_this_sys_count.demerits_));
+
if (best_for_this_sys_count.demerits_ < best.demerits_)
{
best = best_for_this_sys_count;
Real best_demerits_for_this_sys_count = infinity_f;
set_current_breakpoints (0, end, sys_count, bound);
+ if (debug_page_breaking_scoring)
+ message (_f ("trying %d systems", (int)sys_count));
+
for (vsize i = 0; i < current_configuration_count (); i++)
{
vsize min_p_count = min_page_count (i, first_page_num);
bound = current_configuration (i);
}
}
+
+ if (debug_page_breaking_scoring)
+ message (_f ("best score for this sys-count: %f", best_demerits_for_this_sys_count));
+
if (best_demerits_for_this_sys_count >= BAD_SPACING_PENALTY
&& !(best.system_count_status_ & SYSTEM_COUNT_TOO_FEW))
break;