source file of the GNU LilyPond music typesetter
- (c) 2006 Joe Neeman <joeneeman@gmail.com>
+ (c) 2006--2008 Joe Neeman <joeneeman@gmail.com>
*/
#ifndef PAGE_SPACING_HH
#define PAGE_SPACING_HH
#include "constrained-breaking.hh"
+#include "page-spacing-result.hh"
-struct Spacing_result {
- vector<vsize> systems_per_page_;
- vector<Real> force_;
- Real penalty_;
- Real demerits_;
-
- Spacing_result ()
- {
- penalty_ = 0;
- demerits_ = infinity_f;
- }
-};
/* for page_count > 2, we use a dynamic algorithm similar to
constrained-breaking -- we have a class that stores the intermediate
calculations so they can be reused for querying different page counts.
*/
-
class Page_spacer
{
public:
- Page_spacer (vector<Line_details> const &lines, Real page_height, bool ragged, bool ragged_last);
- Spacing_result solve (vsize page_count);
+ Page_spacer (vector<Line_details> const &lines, vsize first_page_num, Page_breaking const*);
+ Page_spacing_result solve (vsize page_count);
private:
struct Page_spacing_node
vsize prev_;
};
- Real page_height_;
+ Page_breaking const *breaker_;
+ vsize first_page_num_;
vector<Line_details> lines_;
Matrix<Page_spacing_node> state_;
vsize max_page_count_;
bool calc_subproblem (vsize page, vsize lines);
};
-Spacing_result
-space_systems_on_min_pages (vector<Line_details> const&,
- Real page_height,
- Real odd_pages_penalty,
- bool ragged,
- bool ragged_last);
-Spacing_result
-space_systems_on_best_pages (vector<Line_details> const&,
- Real page_height,
- Real odd_pages_penalty,
- bool ragged,
- bool ragged_last);
+struct Page_spacing
+{
+ Real force_;
+ Real page_height_;
+ Real rod_height_;
+ Real spring_len_;
+ Real inverse_spring_k_;
+ Real page_top_space_;
+
+ Line_details last_line_;
+ Line_details first_line_;
+
+ Page_spacing (Real page_height, Real page_top_space)
+ {
+ page_height_ = page_height;
+ page_top_space_ = page_top_space;
+ clear ();
+ }
+
+ void calc_force ();
+ void resize (Real new_height);
+ void append_system (const Line_details &line);
+ void prepend_system (const Line_details &line);
+ void clear ();
+};
#endif /* PAGE_SPACING_HH */