2 #include "simple-closure.hh"
3 #include "unpure-pure-container.hh"
6 axis_offset_symbol (Axis a)
9 ? ly_symbol2scm ("X-offset")
10 : ly_symbol2scm ("Y-offset");
14 axis_parent_positioning (Axis a)
17 ? Grob::x_parent_positioning_proc
18 : Grob::y_parent_positioning_proc;
28 (+ (PROC GROB) (orig-proc GROB))
31 add_offset_callback (Grob *g, SCM proc, Axis a)
33 SCM data = g->get_property_data (axis_offset_symbol (a));
34 if (!scm_is_number (data)
35 && !ly_is_procedure (data)
36 && !unsmob<Simple_closure> (data))
38 g->set_property (axis_offset_symbol (a), proc);
42 if (ly_is_procedure (data) || unsmob<Unpure_pure_container> (data))
43 data = Simple_closure::make_smob (scm_list_1 (data));
44 else if (Simple_closure *sc = unsmob<Simple_closure> (data))
45 data = sc->expression ();
47 SCM plus = ly_lily_module_constant ("+");
49 if (ly_is_procedure (proc))
50 proc = Simple_closure::make_smob (scm_list_1 (proc));
52 SCM expr = scm_list_3 (plus, proc, data);
53 g->set_property (axis_offset_symbol (a), Simple_closure::make_smob (expr));
63 (PROC GROB (orig-proc GROB))
66 chain_callback (Grob *g, SCM proc, SCM sym)
68 SCM data = g->get_property_data (sym);
70 if (ly_is_procedure (data) || unsmob<Unpure_pure_container> (data))
71 data = Simple_closure::make_smob (scm_list_1 (data));
72 else if (Simple_closure *sc = unsmob<Simple_closure> (data))
73 data = sc->expression ();
76 Data may be nonnumber. In that case, it is assumed to be
82 SCM expr = scm_list_2 (proc, data);
85 // twice: one as a wrapper for grob property routines,
86 // once for the actual delayed binding.
87 Simple_closure::make_smob (Simple_closure::make_smob (expr)));
91 chain_offset_callback (Grob *g, SCM proc, Axis a)
93 chain_callback (g, proc, axis_offset_symbol (a));