X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Finclude%2Fconstrained-breaking.hh;fp=lily%2Finclude%2Fconstrained-breaking.hh;h=d0e631d901447f3f26cfd6cb5d5fb49dbba291b4;hb=e90f0536f9be39ada0bef0aeb0d275dec3b2fb5b;hp=157411a83c60f3545d818a56277922685111f55c;hpb=a8c9e8a7ca320ab0df5fd32e717fd62cd7635ce6;p=lilypond.git

diff --git a/lily/include/constrained-breaking.hh b/lily/include/constrained-breaking.hh
index 157411a83c..d0e631d901 100644
--- a/lily/include/constrained-breaking.hh
+++ b/lily/include/constrained-breaking.hh
@@ -1,10 +1,20 @@
 /*
-  constrained-breaking.hh -- declare a line breaker that
-  supports limits on the number of systems
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 2006--2011 Joe Neeman <joeneeman@gmail.com>
 
-  (c) 2006--2009 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
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #ifndef CONSTRAINED_BREAKING_HH
@@ -14,14 +24,44 @@
 #include "matrix.hh"
 #include "prob.hh"
 
+/*
+ * Begin/rest-of-line hack.  This geometrical shape is a crude approximation
+ * of Skyline, but it is better than a rectangle.
+ */
+struct Line_shape
+{
+  Interval begin_;
+  Interval rest_;
+
+  Line_shape ()
+  {
+  }
+  Line_shape (Interval begin, Interval rest);
+  Line_shape piggyback (Line_shape mount, Real padding) const;
+};
+
 struct Line_details {
+  Grob *last_column_;
   Real force_;
-  Interval extent_;   /* Y-extent of the system */
+  Line_shape shape_;
+  vector<Stencil *> footnotes_; /* The footnotes at the bottom of the
+                                   page, where each stencil represents
+                                   a different footnote. */
+  Interval refpoint_extent_; /* The refpoints of the first and last
+				spaceable staff in this line.  min-distance
+				should be measured from the bottom
+				refpoint_extent of one line to the
+				top refpoint_extent of the next. */
+  Real tallness_; /* Y-extent, adjusted according to begin/rest-of-line*/
 
   Real padding_;  /* compulsory space after this system (if we're not
 		     last on a page) */
+  Real title_padding_;
+  Real min_distance_;
+  Real title_min_distance_;
   Real bottom_padding_;
   Real space_;    /* spring length */
+  Real title_space_;
   Real inverse_hooke_;
 
   SCM break_permission_;
@@ -33,13 +73,30 @@ struct Line_details {
 
   bool title_;
 
+  /* The page-breaker deals with forbidden page breaks by "compressing"
+     two Line_detailses into one. The following fields are used by the
+     page-breaker to keep track of this. If the number of fields needed
+     by the page-breaker grows, it might be a good idea to create a separate
+     class. */
+  int compressed_lines_count_;
+  int compressed_nontitle_lines_count_;
+  bool last_markup_line_;
+  bool first_markup_line_;
+  bool tight_spacing_;
+
   Line_details ()
   {
+    last_column_ = 0;
     force_ = infinity_f;
     padding_ = 0;
+    title_padding_ = 0;
     bottom_padding_ = 0;
+    min_distance_ = 0;
+    title_min_distance_ = 0;
     space_ = 0;
+    title_space_ = 0;
     inverse_hooke_ = 1;
+    tight_spacing_ = false;
     break_permission_ = ly_symbol2scm ("allow");
     page_permission_ = ly_symbol2scm ("allow");
     turn_permission_ = ly_symbol2scm ("allow");
@@ -47,24 +104,18 @@ struct Line_details {
     page_penalty_ = 0;
     turn_penalty_ = 0;
     title_ = false;
+    compressed_lines_count_ = 1;
+    compressed_nontitle_lines_count_ = 1;
+    last_markup_line_ = false;
+    first_markup_line_ = false;
+    tallness_ = 0;
+    refpoint_extent_ = Interval (0, 0);
   }
 
-  Line_details (Prob *pb)
-  {
-    force_ = 0;
-    extent_ = unsmob_stencil (pb->get_property ("stencil")) ->extent (Y_AXIS);
-    padding_ = robust_scm2double (pb->get_property ("next-padding"), 0);
-    bottom_padding_ = 0;
-    space_ = robust_scm2double (pb->get_property ("next-space"), 1.0);
-    inverse_hooke_ = 1.0;
-    break_permission_ = ly_symbol2scm ("allow");
-    page_permission_ = pb->get_property ("page-break-permission");
-    turn_permission_ = pb->get_property ("page-turn-permission");
-    break_penalty_ = 0;
-    page_penalty_ = robust_scm2double (pb->get_property ("page-break-penalty"), 0);
-    turn_penalty_ = robust_scm2double (pb->get_property ("page-turn-penalty"), 0);
-    title_ = to_boolean (pb->get_property ("is-title"));
-  }
+  Line_details (Prob *pb, Output_def *paper);
+  Real full_height () const;
+  Real tallness () const;
+  Real spring_length (Line_details const &next_line) const;
 };
 
 /*
@@ -116,6 +167,15 @@ private:
   bool ragged_right_;
   bool ragged_last_;
 
+  Real system_system_min_distance_;
+  Real system_system_padding_;
+  Real system_system_space_;
+  Real system_markup_space_;
+  Real score_system_min_distance_;
+  Real score_system_padding_;
+  Real score_markup_min_distance_;
+  Real score_markup_padding_;
+
   /* the (i,j)th entry is the configuration for breaking between
     columns i and j */
   Matrix<Line_details> lines_;
@@ -138,6 +198,7 @@ private:
 
   Real combine_demerits (Real force, Real prev_force);
 
-  bool calc_subproblem(vsize start, vsize systems, vsize max_break_index);
+  bool calc_subproblem (vsize start, vsize systems, vsize max_break_index);
+  void fill_line_details (Line_details *const, vsize, vsize);
 };
 #endif /* CONSTRAINED_BREAKING_HH */