/*
- constrained-breaking.cc -- implement a line breaker that
- support limits on the number of systems
+ 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 "constrained-breaking.hh"
/* NOTE: currently, we aren't using the space_ field of a
Line_details for anything. That's because the approximations
used for scoring a page configuration don't actually space things
- properly (for speed reasong) using springs anchored at the staff
+ properly (for speed reasons) using springs anchored at the staff
refpoints. Rather, the "space" is placed between the extent
boxes. To get a good result, therefore, the "space" value for
page breaking needs to be much smaller than the "space" value for
- page layout. Currently, we just make it zero always.
+ page layout. Currently, we just make it zero always, which means
+ that we will always prefer a tighter vertical layout.
*/
between_system_space_ = 0;
between_system_padding_ = 0;
+ between_system_min_distance_ = 0;
+ between_scores_system_padding_ = 0;
+ between_scores_system_min_distance_ = 0;
+ before_title_padding_ = 0;
+ before_title_min_distance_ = 0;
Output_def *l = pscore_->layout ();
SCM spacing_spec = l->c_variable ("between-system-spacing");
+ SCM between_scores_spec = l->c_variable ("between-scores-system-spacing");
+ SCM title_spec = l->c_variable ("before-title-spacing");
SCM page_breaking_spacing_spec = l->c_variable ("page-breaking-between-system-spacing");
Page_layout_problem::read_spacing_spec (spacing_spec,
&between_system_padding_,
ly_symbol2scm ("padding"));
+ Page_layout_problem::read_spacing_spec (between_scores_spec,
+ &between_scores_system_padding_,
+ ly_symbol2scm ("padding"));
Page_layout_problem::read_spacing_spec (page_breaking_spacing_spec,
&between_system_padding_,
ly_symbol2scm ("padding"));
+ Page_layout_problem::read_spacing_spec (title_spec,
+ &before_title_padding_,
+ ly_symbol2scm ("padding"));
+ Page_layout_problem::read_spacing_spec (between_scores_spec,
+ &between_scores_system_min_distance_,
+ ly_symbol2scm ("minimum-distance"));
+ Page_layout_problem::read_spacing_spec (spacing_spec,
+ &between_system_min_distance_,
+ ly_symbol2scm ("minimum-distance"));
+ Page_layout_problem::read_spacing_spec (page_breaking_spacing_spec,
+ &between_system_min_distance_,
+ ly_symbol2scm ("minimum-distance"));
+ Page_layout_problem::read_spacing_spec (title_spec,
+ &before_title_min_distance_,
+ ly_symbol2scm ("minimum-distance"));
Interval first_line = line_dimensions_int (pscore_->layout (), 0);
Interval other_lines = line_dimensions_int (pscore_->layout (), 1);
int start_rank = Paper_column::get_rank (all_[breaks_[start]]);
int end_rank = Paper_column::get_rank (all_[breaks_[end]]);
System *sys = pscore_->root_system ();
- Interval extent = sys->pure_height (sys, start_rank, end_rank);
+ Interval begin_of_line_extent = sys->begin_of_line_pure_height (start_rank, end_rank);
+ Interval rest_of_line_extent = sys->rest_of_line_pure_height (start_rank, end_rank);
+ bool last = (end == breaks_.size () - 1);
Grob *c = all_[breaks_[end]];
out->last_column_ = c;
out->turn_permission_ = min_permission (out->page_permission_,
out->turn_permission_);
- // TODO: see the hack regarding begin_of_line and
- // rest_of_line extents in align-interface. Perhaps we
- // should do the same thing here so that the effect extends
- // between systems as well as within systems. It isn't as
- // crucial here, however, because the effect is largest when
- // dealing with large systems.
- out->extent_ = (extent.is_empty ()
- || isnan (extent[LEFT])
- || isnan (extent[RIGHT]))
- ? Interval (0, 0) : extent;
- out->padding_ = between_system_padding_;
+ begin_of_line_extent = (begin_of_line_extent.is_empty ()
+ || isnan (begin_of_line_extent[LEFT])
+ || isnan (begin_of_line_extent[RIGHT]))
+ ? Interval (0, 0) : begin_of_line_extent;
+ rest_of_line_extent = (rest_of_line_extent.is_empty ()
+ || isnan (rest_of_line_extent[LEFT])
+ || isnan (rest_of_line_extent[RIGHT]))
+ ? Interval (0, 0) : rest_of_line_extent;
+ out->shape_ = Line_shape (begin_of_line_extent, rest_of_line_extent);
+ out->padding_ = last ? between_scores_system_padding_ : between_system_padding_;
+ out->title_padding_ = before_title_padding_;
+ out->min_distance_ = last ? between_scores_system_min_distance_ : between_system_min_distance_;
+ out->title_min_distance_ = before_title_min_distance_;
out->space_ = between_system_space_;
- out->inverse_hooke_ = extent.length () + between_system_space_;
+ out->inverse_hooke_ = out->full_height () + between_system_space_;
}
Real
return force * force + (prev_force - force) * (prev_force - force);
}
+Line_details::Line_details (Prob *pb, Output_def *paper)
+{
+ SCM spec = paper->c_variable ("after-title-spacing");
+ SCM title_spec = paper->c_variable ("between-title-spacing");
+ padding_ = 0;
+ title_padding_ = 0;
+ min_distance_ = 0;
+ title_min_distance_ = 0;
+ Page_layout_problem::read_spacing_spec (spec, &padding_, ly_symbol2scm ("padding"));
+ Page_layout_problem::read_spacing_spec (title_spec, &title_padding_, ly_symbol2scm ("padding"));
+ Page_layout_problem::read_spacing_spec (spec, &min_distance_, ly_symbol2scm ("minimum-distance"));
+ Page_layout_problem::read_spacing_spec (title_spec, &title_min_distance_, ly_symbol2scm ("minimum-distance"));
+
+ last_column_ = 0;
+ force_ = 0;
+ Interval stencil_extent = unsmob_stencil (pb->get_property ("stencil"))->extent (Y_AXIS);
+ shape_ = Line_shape (stencil_extent, stencil_extent); // pretend it goes all the way across
+ tallness_ = 0;
+ bottom_padding_ = 0;
+ space_ = 0.0;
+ inverse_hooke_ = 1.0;
+ break_permission_ = ly_symbol2scm ("allow");
+ page_permission_ = pb->get_property ("page-break-permission");
+ turn_permission_ = pb->get_property ("page-turn-permission");
+ break_penalty_ = 0;
+ page_penalty_ = robust_scm2double (pb->get_property ("page-break-penalty"), 0);
+ turn_penalty_ = robust_scm2double (pb->get_property ("page-turn-penalty"), 0);
+ title_ = to_boolean (pb->get_property ("is-title"));
+ compressed_lines_count_ = 1;
+ compressed_nontitle_lines_count_ = title_ ? 0 : 1;
+ SCM last_scm = pb->get_property ("last-markup-line");
+ last_markup_line_ = to_boolean (last_scm);
+ SCM first_scm = pb->get_property ("first-markup-line");
+ first_markup_line_ = to_boolean (first_scm);
+ tight_spacing_ = to_boolean (pb->get_property ("tight-spacing"));
+ first_refpoint_offset_ = 0;
+}
+
+Real
+Line_details::full_height () const
+{
+ Interval ret;
+ ret.unite(shape_.begin_);
+ ret.unite(shape_.rest_);
+ return ret.length();
+}
+
+Real
+Line_details::tallness () const
+{
+ return tallness_;
+}
+
+Line_shape::Line_shape (Interval begin, Interval rest)
+{
+ begin_ = begin;
+ rest_ = rest;
+}
+
+Line_shape
+Line_shape::piggyback (Line_shape mount, Real padding) const
+{
+ Real elevation = max (begin_[UP]-mount.begin_[DOWN], rest_[UP]-mount.rest_[DOWN]);
+ Interval begin = Interval (begin_[DOWN], elevation + mount.begin_[UP] + padding);
+ Interval rest = Interval (rest_[DOWN], elevation + mount.rest_[UP] + padding);
+ return Line_shape (begin, rest);
+}
projects / lilypond.git / blobdiff