lily/pointer-group-interface.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2005--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
   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 "pointer-group-interface.hh"
  21
  22 #include "grob-array.hh"
  23 #include "grob.hh"
  24
  25 int
  26 Pointer_group_interface::count (Grob *me, SCM sym)
  27 {
  28   Grob_array *arr = unsmob_grob_array (me->internal_get_object (sym));
  29   return arr ? arr->size () : 0;
  30 }
  31
  32 void
  33 Pointer_group_interface::add_grob (Grob *me, SCM sym, SCM p)
  34 {
  35   add_grob (me, sym, unsmob_grob (p));
  36 }
  37
  38 void
  39 Pointer_group_interface::set_ordered (Grob *me, SCM sym, bool ordered)
  40 {
  41   Grob_array *arr = get_grob_array (me, sym);
  42   arr->set_ordered (ordered);
  43 }
  44
  45 Grob_array *
  46 Pointer_group_interface::get_grob_array (Grob *me, SCM sym)
  47 {
  48   SCM scm_arr = me->internal_get_object (sym);
  49   Grob_array *arr = unsmob_grob_array (scm_arr);
  50   if (!arr)
  51     {
  52       scm_arr = Grob_array::make_array ();
  53       arr = unsmob_grob_array (scm_arr);
  54       me->set_object (sym, scm_arr);
  55     }
  56   return arr;
  57 }
  58
  59 Grob *
  60 Pointer_group_interface::find_grob (Grob *me, SCM sym, bool (*pred) (Grob*))
  61 {
  62   Grob_array *arr = get_grob_array (me, sym);
  63
  64   for (vsize i = 0; i < arr->size (); i++)
  65     if (pred (arr->grob (i)))
  66       return arr->grob (i);
  67
  68   return 0;
  69 }
  70
  71 void
  72 Pointer_group_interface::add_grob (Grob *me, SCM sym, Grob *p)
  73 {
  74   Grob_array *arr = get_grob_array (me, sym);
  75   arr->add (p);
  76 }
  77
  78 void
  79 Pointer_group_interface::add_unordered_grob (Grob *me, SCM sym, Grob *p)
  80 {
  81   Grob_array *arr = get_grob_array (me, sym);
  82   arr->add (p);
  83   arr->set_ordered (false);
  84 }
  85
  86 static vector<Grob*> empty_array;
  87
  88 vector<Grob*> const &
  89 ly_scm2link_array (SCM x)
  90 {
  91   Grob_array *arr = unsmob_grob_array (x);
  92   return arr ? arr->array () : empty_array;
  93 }
  94
  95 vector<Grob*> const &
  96 internal_extract_grob_array (Grob const *elt, SCM symbol)
  97 {
  98   return elt
  99     ? ly_scm2link_array (elt->internal_get_object (symbol))
 100     : empty_array;
 101 }
 102
 103 vector<Item*>
 104 internal_extract_item_array (Grob const *elt, SCM symbol)
 105 {
 106   Grob_array *arr = unsmob_grob_array (elt->internal_get_object (symbol));
 107   vector<Item*> items;
 108   for (vsize i = 0; arr && i < arr->size (); i++)
 109     items.push_back (arr->item (i));
 110
 111   return items;
 112 }