2 grob-interface.cc -- implement graphic objects interface
4 source file of the GNU LilyPond music typesetter
6 (c) 2002--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #include "grob-interface.hh"
12 #include "international.hh"
13 #include "protected-scm.hh"
14 #include "string-convert.hh"
18 SCM add_interface (char const *cxx_name,
22 string suffix ("-interface");
23 string lispy_name = camel_case_to_lisp_identifier (cxx_name);
24 vsize end = max (int (0), int (lispy_name.length () - suffix.length ()));
25 if (lispy_name.substr (end) != suffix)
28 SCM s = ly_symbol2scm (lispy_name.c_str ());
29 SCM d = scm_from_locale_string (descr);
30 SCM l = parse_symbol_list (vars);
32 internal_add_interface (s, d, l);
38 check_interfaces_for_property (Grob const *me, SCM sym)
40 if (sym == ly_symbol2scm ("meta"))
43 otherwise we get in a nasty recursion loop.
48 SCM ifs = me->interfaces ();
50 SCM all_ifaces = ly_all_grob_interfaces ();
52 for (; !found && scm_is_pair (ifs); ifs = scm_cdr (ifs))
54 SCM iface = scm_hashq_ref (all_ifaces, scm_car (ifs), SCM_BOOL_F);
55 if (iface == SCM_BOOL_F)
57 string msg = to_string (_f ("Unknown interface `%s'",
58 ly_symbol2string (scm_car (ifs)).c_str ()));
59 programming_error (msg);
63 found = found || (scm_c_memq (sym, scm_caddr (iface)) != SCM_BOOL_F);
68 string str = to_string (_f ("Grob `%s' has no interface for property `%s'",
70 ly_symbol2string (sym).c_str ()));
71 programming_error (str);