/*
- page-breaking.cc -- implement a superclass and utility
- functions shared by various 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--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/>.
*/
/*
{
Line_details const &old = ret.back ();
Line_details compressed = orig[i];
+ Real padding = orig[i].title_ ? old.title_padding_ : old.padding_;
+
compressed.extent_[DOWN] = old.extent_[DOWN];
- compressed.extent_[UP] = old.extent_[UP] + orig[i].extent_.length () + old.padding_;
+ compressed.extent_[UP] = old.extent_[UP] + orig[i].extent_.length () + padding;
compressed.space_ += old.space_;
compressed.inverse_hooke_ += old.inverse_hooke_;
systems_per_page_ = max (0, robust_scm2int (pb->paper_->c_variable ("systems-per-page"), 0));
max_systems_per_page_ = max (0, robust_scm2int (pb->paper_->c_variable ("max-systems-per-page"), 0));
min_systems_per_page_ = max (0, robust_scm2int (pb->paper_->c_variable ("min-systems-per-page"), 0));
+ orphan_penalty_ = robust_scm2int (pb->paper_->c_variable ("orphan-penalty"), 100000);
if (systems_per_page_ && (max_systems_per_page_ || min_systems_per_page_))
{
if (cached_configuration_index_ != configuration_index)
{
cached_configuration_index_ = configuration_index;
- Real padding = 0;
- SCM spacing_spec = book_->paper_->c_variable ("between-system-spacing");
- SCM page_breaking_spacing_spec = book_->paper_->c_variable ("page-breaking-between-system-spacing");
- Page_layout_problem::read_spacing_spec (spacing_spec, &padding, ly_symbol2scm ("padding"));
- Page_layout_problem::read_spacing_spec (page_breaking_spacing_spec, &padding, ly_symbol2scm ("padding"));
Line_division &div = current_configurations_[configuration_index];
uncompressed_line_details_.clear ();
else
{
assert (div[i] == 1);
- uncompressed_line_details_.push_back (Line_details (system_specs_[sys].prob_));
- uncompressed_line_details_.back ().padding_ =
- robust_scm2double (system_specs_[sys].prob_->get_property ("next-padding"),
- padding);
+ uncompressed_line_details_.push_back (Line_details (system_specs_[sys].prob_, book_->paper_));
}
}
cached_line_details_ = compress_lines (uncompressed_line_details_);
for (vsize i = 0; i < cached_line_details_.size (); i++)
{
Real ext_len = cached_line_details_[i].extent_.length ();
- Real next_rod_height = cur_rod_height + ext_len
- + ((cur_rod_height > 0) ? cached_line_details_[i].padding_: 0);
+ Real padding = 0;
+ if (cur_rod_height > 0)
+ padding = cached_line_details_[i].title_ ?
+ cached_line_details_[i-1].title_padding_ : cached_line_details_[i-1].padding_;
+
+ Real next_rod_height = cur_rod_height + ext_len + padding;
Real next_spring_height = cur_spring_height + cached_line_details_[i].space_;
Real next_height = next_rod_height + (ragged () ? next_spring_height : 0)
+ min_whitespace_at_bottom_of_page (cached_line_details_[i]);
// If systems_per_page_ is positive, we don't really try to space on N
// or N+1 pages; see the comment to space_systems_on_n_pages.
Page_spacing_result
-Page_breaking::space_systems_on_n_or_one_more_pages (vsize configuration, vsize n, vsize first_page_num)
+Page_breaking::space_systems_on_n_or_one_more_pages (vsize configuration, vsize n, vsize first_page_num,
+ Real penalty_for_fewer_pages)
{
Page_spacing_result n_res;
Page_spacing_result m_res;
m_res = finalize_spacing_result (configuration, m_res);
n_res = finalize_spacing_result (configuration, n_res);
- Real penalty = blank_page_penalty ();
- n_res.demerits_ += penalty;
+ Real page_spacing_weight = robust_scm2double (book_->paper_->c_variable ("page-spacing-weight"), 10);
+ n_res.demerits_ += penalty_for_fewer_pages * page_spacing_weight;
if (n_res.force_.size ())
- n_res.force_.back () += penalty;
+ n_res.force_.back () += penalty_for_fewer_pages;
return (m_res.demerits_ < n_res.demerits_) ? m_res : n_res;
}
Page_breaking::space_systems_on_best_pages (vsize configuration, vsize first_page_num)
{
vsize min_p_count = min_page_count (configuration, first_page_num);
- Real odd_pages_penalty = blank_page_penalty ();
cache_line_details (configuration);
Page_spacer ps (cached_line_details_, first_page_num, this);
Page_spacing_result best = ps.solve (min_p_count);
- best.force_.back () += (min_p_count % 2) ? odd_pages_penalty : 0;
- best.demerits_ += (min_p_count % 2) ? odd_pages_penalty : 0;
for (vsize i = min_p_count+1; i <= cached_line_details_.size (); i++)
{
Page_spacing_result cur = ps.solve (i);
- cur.demerits_ += (i % 2) ? odd_pages_penalty : 0;
if (cur.demerits_ < best.demerits_)
best = cur;
}
- return finalize_spacing_result (configuration, best);
+ Page_spacing_result ret = finalize_spacing_result (configuration, best);
+ return ret;
}
Page_spacing_result
// FIXME: take into account the height of the footer
return max (0.0, max (padding, min_distance + line.extent_[DOWN]));
}
+
+int
+Page_breaking::orphan_penalty () const
+{
+ return orphan_penalty_;
+}
projects / lilypond.git / blobdiff