}
/*
- This is a somewhat unconventional page-breaking algorithm. Every
- score will be put on a single page, whose width is enough
- to fit the entire score one one line. Line breaks and page breaks
- are ignored, as are the page dimensions in the paper block.
+ This is a somewhat unconventional page-breaking algorithm. Every
+ score is put on a single page, whose width is enough to fit the entire
+ score on one line. Line breaks and page breaks are ignored, and the
+ paper-width setting in the paper block is modified to fit the music.
*/
SCM
One_line_page_breaking::solve ()
{
SCM all_pages = SCM_EOL;
+ Real max_width = 0;
for (vsize i = 0; i < system_specs_.size (); ++i)
- if (Paper_score *ps = system_specs_[i].pscore_)
- {
- vector<Grob*> cols = ps->root_system ()->used_columns ();
-
- // No indent, "infinite" line width, ragged.
- Column_x_positions pos = get_line_configuration (cols, numeric_limits<Real>::max (), 0, true);
- vector<Column_x_positions> positions;
- positions.push_back (pos);
-
- ps->root_system ()->break_into_pieces (positions);
- ps->root_system ()->do_break_substitution_and_fixup_refpoints ();
- Grob *system = ps->root_system ()->broken_intos_[0];
- Real width = system->extent (system, X_AXIS).length ();
- Real height = system->extent (system, Y_AXIS).length ();
-
- // HACK: probably shouldn't be modifying the paper_; better to modify the page
- // afterwards.
- book_->paper_->set_variable (ly_symbol2scm ("paper-width"), scm_from_double (width + 100));
- // TODO: figure out what the height should be.
- //book_->paper_->set_variable (ly_symbol2scm ("paper-height"), scm_from_double (height));
- vector<vsize> lines_per_page;
- lines_per_page.push_back (1);
- SCM systems = scm_list_1 (system->self_scm ());
- SCM pages = make_pages (lines_per_page, systems);
- all_pages = scm_cons (scm_car (pages), all_pages);
- }
+ {
+ if (Paper_score *ps = system_specs_[i].pscore_)
+ {
+ vector<Grob *> cols = ps->root_system ()->used_columns ();
+
+ // No indent, "infinite" line width, ragged.
+ Column_x_positions pos = get_line_configuration (cols, numeric_limits<Real>::max (), 0, true);
+ vector<Column_x_positions> positions;
+ positions.push_back (pos);
+
+ ps->root_system ()->break_into_pieces (positions);
+ ps->root_system ()->do_break_substitution_and_fixup_refpoints ();
+ Grob *system = ps->root_system ()->broken_intos_[0];
+
+ vector<vsize> lines_per_page;
+ lines_per_page.push_back (1);
+ SCM systems = scm_list_1 (system->self_scm ());
+ SCM pages = make_pages (lines_per_page, systems);
+
+ max_width = max (max_width, system->extent (system, X_AXIS).length ());
+ all_pages = scm_cons (scm_car (pages), all_pages);
+ }
+ else if (Prob *pb = system_specs_[i].prob_)
+ // Because we don't call Page_breaking::systems in this algorithm,
+ // we need to manually unprotect the titles.
+ pb->unprotect ();
+ }
+
+ // Alter paper-width so that it is large enough to fit every system.
+ // TODO: it might be nice to allow different pages to have different widths.
+ // This would need support in the backends (eg. framework-ps.scm).
+ Real right_margin = robust_scm2double (book_->paper_->c_variable ("right-margin"), 0.0);
+ Real left_margin = robust_scm2double (book_->paper_->c_variable ("left-margin"), 0.0);
+ Real width = max_width + right_margin + left_margin;
+ book_->paper_->set_variable (ly_symbol2scm ("paper-width"), scm_from_double (width));
return scm_reverse_x (all_pages, SCM_EOL);
}