2 lyric-phrasing-engraver.hh -- declare Lyric_phrasing_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000 Glen Prideaux <glenprideaux@iname.com>
10 #ifndef LYRIC_PHRASING_ENGRAVER_HH
11 #define LYRIC_PHRASING_ENGRAVER_HH
13 #include "lily-proto.hh"
14 #include "engraver.hh"
18 class Voice_alist_entry;
22 Align lyrics with noteheads, left aligning beginning of phrases,
23 right aligning end of phrases, centering others under their notes.
28 * Build an engraver that catches noteheads and lyrics.
30 (It needs to be in a context above Staff and Lyrics, eg. in Score
33 * Determine which heads belong to which lyrics
35 (eg. by looking at the names of their originating contexts, or maybe
38 * Attach the lyrics to the appropriate heads
40 (by doing lyric->set_parent (head, X_AXIS), that will fix the current
41 noteheadwidth guessing kludge)
43 * Check if the lyric syllables end or start a phrase.
45 (eg. check if the syllable ends with punctuation, and remember that
46 fact for the next one.)
48 * Adjust their alignment accordingly.
50 (eg. by doing lyric->add_offset_callback(centered_on_parent,X_AXIS)
51 and setting self-alignment-X)
53 * Add a property to switch on/off the engraver (for multi stanza
54 vs. single stanza music)
56 Maybe this engraver could also take care of correct lyric alignment
63 class Lyric_phrasing_engraver : public Engraver
66 virtual void acknowledge_element(Score_element_info);
67 virtual void process_acknowledged ();
68 virtual void do_pre_move_processing();
71 void record_notehead(const String &context_id, Score_element * notehead);
72 void record_lyric(const String &context_id, Score_element * lyric);
73 Voice_alist_entry * lookup_context_id(const String &context_id);
76 Lyric_phrasing_engraver ();
77 ~Lyric_phrasing_engraver ();
78 VIRTUAL_COPY_CONS (Translator);
81 /** association list of Voice_alist_entry smobs
83 Protected_scm voice_alist_;
87 class Voice_alist_entry
89 bool first_in_phrase_b_;
90 Score_element * notehead_l_;
91 Link_array<Score_element> lyric_list_;
97 static SCM make_entry();
98 void set_first_in_phrase(bool f);
99 void set_notehead(Score_element * notehead);
100 void add_lyric(Score_element * lyric);
103 bool set_lyric_align(const char *punc);
104 int appropriate_alignment(const char *punc);
108 DECLARE_SIMPLE_SMOBS(Voice_alist_entry,);
111 Voice_alist_entry * unsmob_voice_entry (SCM);
114 #endif // LYRIC_PHRASING_ENGRAVER_HH