SCM
Optimal_page_breaking::solve ()
{
- vsize end = breaks_.size () - 1;
- vsize min_sys_count = 0;
- vsize ideal_sys_count = 0;
+ vsize end = last_break_position ();
vsize max_sys_count = max_system_count (0, end);
- vsize page_count = 0;
- Line_division ideal_line_division;
- Line_division best_division;
- Line_division bound;
vsize first_page_num = robust_scm2int (book_->paper_->c_variable ("first-page-number"), 1);
+ SCM forced_page_count = book_->paper_->c_variable ("page-count");
- /* find out the ideal number of pages */
- message (_ ("Finding the ideal number of pages..."));
set_to_ideal_line_configuration (0, end);
- ideal_line_division = current_configuration (0);
- Spacing_result best = space_systems_on_best_pages (0, first_page_num);
- page_count = best.systems_per_page_.size ();
- best_division = ideal_line_division;
-
- for (vsize i = 0; i < page_count; i++)
- ideal_sys_count += best.systems_per_page_[i];
-
- min_sys_count = ideal_sys_count - best.systems_per_page_.back ();
- if (page_count > 1)
- min_sys_count -= best.systems_per_page_[page_count - 2];
+ Page_spacing_result best;
+ vsize page_count = robust_scm2int (forced_page_count, 1);
+ Line_division ideal_line_division = current_configuration (0);
+ Line_division best_division = ideal_line_division;
+ vsize min_sys_count = 1;
+ vsize ideal_sys_count = system_count ();
+
+ if (!scm_is_integer (forced_page_count))
+ {
+ /* find out the ideal number of pages */
+ message (_ ("Finding the ideal number of pages..."));
+
+ best = space_systems_on_best_pages (0, first_page_num);
+ page_count = best.systems_per_page_.size ();
+
+ ideal_sys_count = best.system_count ();
+ min_sys_count = ideal_sys_count - best.systems_per_page_.back ();
+
+ if (page_count > 1 && best.systems_per_page_[page_count - 2] > 1)
+ min_sys_count -= best.systems_per_page_[page_count - 2];
+ }
+ else
+ {
+ /* todo: the following line will spit out programming errors if the
+ ideal line spacing doesn't fit on PAGE_COUNT pages */
+ best = space_systems_on_n_pages (0, page_count, first_page_num);
+ min_sys_count = page_count;
+ }
if (page_count == 1)
message (_ ("Fitting music on 1 page..."));
+ else if (scm_is_integer (forced_page_count))
+ message (_f ("Fitting music on %d pages...", (int)page_count));
else
message (_f ("Fitting music on %d or %d pages...", (int)page_count-1, (int)page_count));
/* try a smaller number of systems than the ideal number for line breaking */
- bound = ideal_line_division;
+ Line_division bound = ideal_line_division;
for (vsize sys_count = ideal_sys_count; --sys_count >= min_sys_count;)
{
- Spacing_result best_for_this_sys_count;
+ Page_spacing_result best_for_this_sys_count;
set_current_breakpoints (0, end, sys_count, Line_division (), bound);
for (vsize i = 0; i < current_configuration_count (); i++)
{
vsize min_p_count = min_page_count (i, first_page_num);
- Spacing_result cur;
+ Page_spacing_result cur;
- if (min_p_count > page_count)
- continue;
- else if (min_p_count == page_count)
+ 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);
best_division = bound;
}
- if (best_for_this_sys_count.systems_per_page_.size () < page_count)
- {
- /* if the pages are stretched on average, stop trying to reduce sys_count */
- Real avg_f = 0;
- for (vsize i = 0; i < best_for_this_sys_count.systems_per_page_.size (); i++)
- avg_f += best_for_this_sys_count.systems_per_page_[i];
- if (avg_f > 0)
- break;
- }
+ /* if the pages are stretched on average, stop trying to reduce sys_count */
+ if (best_for_this_sys_count.page_count () < page_count
+ && best_for_this_sys_count.average_force () > 0)
+ break;
+
if (isinf (best_for_this_sys_count.demerits_))
break;
for (vsize i = 0; i < current_configuration_count (); i++)
{
vsize min_p_count = min_page_count (i, first_page_num);
- Spacing_result cur;
+ Page_spacing_result cur;
if (min_p_count > page_count)
continue;
break;
}
- message ("Drawing systems...");
+ message (_ ("Drawing systems..."));
break_into_pieces (0, end, best_division);
SCM lines = systems ();
return make_pages (best.systems_per_page_, lines);