/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 2006--2010 Joe Neeman <joeneeman@gmail.com>
+ Copyright (C) 2006--2015 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
#include "prob.hh"
#include "system.hh"
-static bool
-is_break (Grob *)
-{
- return false;
-}
-
Optimal_page_breaking::Optimal_page_breaking (Paper_book *pb)
- : Page_breaking (pb, is_break)
+ : Page_breaking (pb, 0, 0)
{
}
Line_division ideal_line_division = current_configuration (0);
Line_division best_division = ideal_line_division;
vsize min_sys_count = 1;
+
+ // Note that system_count () only counts non-title systems.
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..."));
-
- if (systems_per_page () > 0)
- best = space_systems_with_fixed_number_per_page (0, first_page_num);
- else
- best = space_systems_on_best_pages (0, first_page_num);
+
+ 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];
+ if (page_count == 0)
+ {
+ min_sys_count = 0;
+ }
+ else
+ {
+ 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];
- min_sys_count = max (min_sys_count, (vsize)1);
+ if (min_sys_count > ideal_sys_count // subtraction wrapped around
+ || min_sys_count <= 0)
+ min_sys_count = 1;
+ }
}
else
{
+ /* If systems-per-page and page-count are both specified, we know exactly
+ how many systems should be present. */
+ if (systems_per_page () > 0)
+ {
+ ideal_sys_count = systems_per_page () * page_count;
+
+ if (ideal_sys_count > max_system_count (0, end)
+ || ideal_sys_count < min_system_count (0, end))
+ {
+ warning (_ ("could not satisfy systems-per-page and page-count at the same time, ignoring systems-per-page"));
+ ideal_sys_count = system_count ();
+ min_sys_count = page_count;
+ }
+ else
+ {
+ set_current_breakpoints (0, end, ideal_sys_count);
+ min_sys_count = max_sys_count = ideal_sys_count;
+ ideal_line_division = best_division = current_configuration (0);
+ }
+ }
+ else
+ min_sys_count = page_count;
+
/* TODO: the following line will spit out programming errors if the
- ideal line spacing doesn't fit on PAGE_COUNT pages */
- /* TODO: the interaction between systems_per_page and page_count needs to
- be considered. */
+ 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))
+ else if (scm_is_integer (forced_page_count) || page_count == 0)
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));
+ 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 */
Line_division bound = ideal_line_division;
- for (vsize sys_count = ideal_sys_count; --sys_count >= min_sys_count;)
+ for (vsize sys_count = ideal_sys_count + 1; --sys_count >= min_sys_count;)
{
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));
+ 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);
- Page_spacing_result cur;
-
- 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, 0);
-
- if (cur.demerits_ < best_for_this_sys_count.demerits_)
- {
- best_for_this_sys_count = cur;
- bound = current_configuration (i);
- }
- }
+ {
+ Page_spacing_result cur;
+
+ if (scm_is_integer (forced_page_count))
+ cur = space_systems_on_n_pages (i, page_count, first_page_num);
+ else
+ cur = space_systems_on_best_pages (i, first_page_num);
+
+ if (cur.demerits_ < best_for_this_sys_count.demerits_)
+ {
+ best_for_this_sys_count = cur;
+ bound = current_configuration (i);
+ }
+ }
if (debug_page_breaking_scoring)
- message (_f ("best score for this sys-count: %f", best_for_this_sys_count.demerits_));
+ 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;
- best_division = bound;
- }
+ {
+ best = best_for_this_sys_count;
+ best_division = bound;
+ }
/* Check to see if we already have too few systems. There are two ways
- we check this: if we are trying one less than the ideal number of pages
- and the pages are stretched on average then we have too
- few systems. If the spacing is worse than BAD_SPACING_PENALTY, then we
- have too few systems. In either case, though, we need to continue reducing
- the number of systems if max-systems-per-page requires it. */
+ we check this: if we are trying one less than the ideal number of pages
+ and the pages are stretched on average then we have too
+ few systems. If the spacing is worse than BAD_SPACING_PENALTY, then we
+ have too few systems. In either case, though, we need to continue reducing
+ the number of systems if max-systems-per-page requires it. */
if (!(best.system_count_status_ & SYSTEM_COUNT_TOO_MANY))
- {
- if (best_for_this_sys_count.page_count () < page_count
- && best_for_this_sys_count.average_force () > 0)
- break;
-
- if (best_for_this_sys_count.demerits_ >= BAD_SPACING_PENALTY)
- break;
- }
+ {
+ if (best_for_this_sys_count.page_count () < page_count
+ && best_for_this_sys_count.average_force () > 0)
+ break;
+
+ if (best_for_this_sys_count.demerits_ >= BAD_SPACING_PENALTY)
+ break;
+ }
}
/* try a larger number of systems than the ideal line breaking number. This
- is more or less C&P, but the loop bounds make it difficult to try something
- like do {...} while (flip(&d) != UP). */
+ is more or less C&P. */
bound = ideal_line_division;
- for (vsize sys_count = ideal_sys_count+1; sys_count <= max_sys_count; sys_count++)
+ for (vsize sys_count = ideal_sys_count + 1; sys_count <= max_sys_count; 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));
+ 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);
- Page_spacing_result cur;
-
- if (min_p_count > page_count)
- continue;
- else
- cur = space_systems_on_n_pages (i, page_count, first_page_num);
-
- if (cur.demerits_ < best.demerits_)
- {
- best = cur;
- best_division = current_configuration (i);
- }
-
- if (cur.demerits_ < best_demerits_for_this_sys_count)
- {
- best_demerits_for_this_sys_count = cur.demerits_;
- bound = current_configuration (i);
- }
- }
+ {
+ vsize min_p_count = min_page_count (i, first_page_num);
+ Page_spacing_result cur;
+
+ if (min_p_count > page_count)
+ continue;
+ else if (scm_is_integer (forced_page_count))
+ cur = space_systems_on_n_pages (i, page_count, first_page_num);
+ else
+ cur = space_systems_on_best_pages (i, first_page_num);
+
+ if (cur.demerits_ < best.demerits_)
+ {
+ best = cur;
+ best_division = current_configuration (i);
+ }
+
+ if (cur.demerits_ < best_demerits_for_this_sys_count)
+ {
+ best_demerits_for_this_sys_count = cur.demerits_;
+ bound = current_configuration (i);
+ }
+ }
if (debug_page_breaking_scoring)
- message (_f ("best score for this sys-count: %f", best_demerits_for_this_sys_count));
+ 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;
+ && !(best.system_count_status_ & SYSTEM_COUNT_TOO_FEW))
+ break;
}
message (_ ("Drawing systems..."));
projects / lilypond.git / blobdiff