2 ligature-engraver.hh -- declare Ligature_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2002--2005 Juergen Reuter <reuter@ipd.uka.de>
8 #ifndef LIGATURE_ENGRAVER_HH
9 #define LIGATURE_ENGRAVER_HH
11 #include "engraver.hh"
14 * FIXME: Spanner *create_ligature_spanner () and virtual void
15 * typeset_ligature (...) are abstract methods, such that we would
16 * like to declare them abstract:
18 * virtual Spanner *create_ligature_spanner () = 0;
19 * virtual void typeset_ligature (...) = 0;
21 * Unfortunately, clone_const_helper() (as expanded from the
22 * TRANSLATOR_DECLARATIONS macro) requires this class to be
23 * instantiatable, such that it may not have any abstract virtual
24 * functions. As a workaround, the actually abstract methods are
25 * implemented, but produce a programming_error whenever called. --jr
28 class Ligature_engraver : public Engraver
31 virtual void stop_translation_timestep ();
32 virtual void finalize ();
34 virtual void acknowledge_grob (Grob_info);
35 virtual bool try_music (Music *);
36 virtual void process_music ();
37 virtual Spanner *create_ligature_spanner (); /* abstract method */
38 virtual void typeset_ligature (Spanner *ligature,
39 Array<Grob_info> primitives); /* abstract method */
40 virtual Spanner *current_ligature ();
41 SCM brew_ligature_primitive_proc;
44 TRANSLATOR_DECLARATIONS (Ligature_engraver);
47 Drul_array<Music *> reqs_drul_;
50 Array<Grob_info> primitives_;
52 Spanner *finished_ligature_;
53 Array<Grob_info> finished_primitives_;
55 Music *prev_start_req_;
57 // moment where ligature started.
58 Moment ligature_start_mom_;
62 void override_stencil_callback ();
63 void revert_stencil_callback ();
66 #endif // LIGATURE_ENGRAVER_HH