lily/paper-system.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2004--2011 Jan Nieuwenhuizen <janneke@gnu.org>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "paper-system.hh"
  21 #include "item.hh"
  22
  23 Prob *
  24 make_paper_system (SCM immutable_init)
  25 {
  26   Prob *prob = new Prob (ly_symbol2scm ("paper-system"), immutable_init);
  27   return prob;
  28 }
  29
  30 /*
  31   TODO
  32   it might be interesting to split off the footnotes as well, ie.
  33
  34   get_footnotes(SCM expr, SCM* footnotes, SCM* cleaned)
  35
  36   by doing it this way and overwriting the old expr in the caller,
  37   you can make sure nobody tries to handle footnotes differently
  38   downstream.
  39 */
  40 SCM
  41 get_footnotes (SCM expr)
  42 {
  43   if (!scm_is_pair (expr))
  44     return SCM_EOL;
  45
  46   SCM head = scm_car (expr);
  47
  48   if (head == ly_symbol2scm ("delay-stencil-evaluation"))
  49     {
  50       // we likely need to do something here...just don't know what...
  51       return SCM_EOL;
  52     }
  53
  54   if (head == ly_symbol2scm ("combine-stencil"))
  55     {
  56       SCM out = SCM_EOL;
  57       SCM *tail = &out;
  58
  59       for (SCM x = scm_cdr (expr); scm_is_pair (x); x = scm_cdr (x))
  60         {
  61           SCM footnote = get_footnotes (scm_car (x));
  62           if (scm_is_pair (footnote))
  63             {
  64               for (SCM y = footnote; scm_is_pair (y); y = scm_cdr (y))
  65                 {
  66                   *tail = scm_cons (scm_car (y), SCM_EOL);
  67                   tail = SCM_CDRLOC (*tail);
  68                 }
  69             }
  70           else if (SCM_EOL != footnote)
  71             {
  72               *tail = scm_cons (footnote, SCM_EOL);
  73               tail = SCM_CDRLOC (*tail);
  74             }
  75         }
  76       return out;
  77     }
  78   if (head == ly_symbol2scm ("translate-stencil"))
  79     return get_footnotes (scm_caddr (expr));
  80
  81   if (head == ly_symbol2scm ("footnote"))
  82     return scm_cadr (expr);
  83
  84   return SCM_EOL;
  85 }
  86
  87
  88 void
  89 paper_system_set_stencil (Prob *prob, Stencil s)
  90 {
  91   SCM yext = prob->get_property ("Y-extent");
  92
  93   if (is_number_pair (yext))
  94     {
  95       Box b = s.extent_box ();
  96       b[Y_AXIS] = ly_scm2interval (yext);
  97
  98       s = Stencil (b, s.expr ());
  99     }
 100
 101   prob->set_property ("stencil", s.smobbed_copy ());
 102 }