lily/minimal-page-breaking.cc

   1 /*
   2   minimal-page-breaking.cc -- implement a page-breaker that stacks as
   3   many systems on a page before moving to the next one. Specialized
   4   for books with many pages, or a lot of text.
   5
   6   source file of the GNU LilyPond music typesetter
   7
   8   (c) 2007 Nicolas Sceaux <nicolas.sceaux@free.fr>
   9 */
  10
  11 #include "international.hh"
  12 #include "minimal-page-breaking.hh"
  13 #include "output-def.hh"
  14 #include "page-spacing.hh"
  15 #include "paper-book.hh"
  16
  17 static bool
  18 is_break (Grob *g)
  19 {
  20   (void) g; /* shutup warning */
  21   return false;
  22 }
  23
  24 Minimal_page_breaking::Minimal_page_breaking (Paper_book *pb)
  25   : Page_breaking (pb, is_break)
  26 {
  27 }
  28
  29 Minimal_page_breaking::~Minimal_page_breaking ()
  30 {
  31 }
  32
  33 SCM
  34 Minimal_page_breaking::solve ()
  35 {
  36   vsize end = last_break_position ();
  37
  38   message ("Computing line breaks...");
  39   set_to_ideal_line_configuration (0, end);
  40   break_into_pieces (0, end, current_configuration (0));
  41
  42   message (_ ("Computing page breaks..."));
  43   vsize first_page_num = robust_scm2int (book_->paper_->c_variable ("first-page-number"), 1);
  44   Page_spacing_result res = pack_systems_on_least_pages (0, first_page_num);
  45   SCM lines = systems ();
  46   return make_pages (res.systems_per_page_, lines);
  47 }