2 text-spanner-engraver.cc -- implement Text_spanner_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "dimensions.hh"
10 #include "musical-request.hh"
11 #include "paper-column.hh"
12 #include "note-column.hh"
14 #include "side-position-interface.hh"
15 #include "engraver.hh"
16 #include "group-interface.hh"
17 #include "directional-element-interface.hh"
18 #include "translator-group.hh"
19 #include "axis-group-interface.hh"
22 class Text_spanner_engraver : public Engraver
25 VIRTUAL_COPY_CONS (Translator);
26 Text_spanner_engraver ();
29 virtual void finalize ();
30 virtual void acknowledge_grob (Grob_info);
31 virtual bool try_music (Music *);
32 virtual void stop_translation_timestep ();
33 virtual void start_translation_timestep ();
34 virtual void create_grobs ();
39 Span_req *current_req_;
40 Drul_array<Span_req*> req_drul_;
44 ADD_THIS_TRANSLATOR (Text_spanner_engraver);
47 Text_spanner_engraver::Text_spanner_engraver ()
57 Text_spanner_engraver::start_translation_timestep ()
64 Text_spanner_engraver::try_music (Music *m)
66 if (Span_req *s = dynamic_cast <Span_req*> (m))
68 String t = ly_scm2string (s->get_mus_property ("span-type"));
79 req_drul_[s->get_span_dir()] = s;
87 Text_spanner_engraver::create_grobs ()
93 req_drul_[STOP]->origin ()->warning
94 (_ ("can't find start of text spanner"));
99 Grob* e = unsmob_grob (get_property ("currentMusicalColumn"));
100 span_->set_bound (RIGHT, e);
109 if (req_drul_[START])
113 req_drul_[START]->origin ()->warning
114 (_ ("already have a text spanner"));
118 current_req_ = req_drul_[START];
119 span_ = new Spanner (get_property ("TextSpanner"));
121 /* Ugh. Reset (de)cresc. specific properties */
122 span_->set_grob_property ("outer", SCM_BOOL_T);
123 span_->set_grob_property ("if-text-padding", gh_double2scm (0));
124 span_->set_grob_property ("width-correct", gh_double2scm (0));
126 Side_position::set_axis (span_, Y_AXIS);
127 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
128 span_->set_bound (LEFT, e);
130 announce_grob (span_, req_drul_[START]);
131 req_drul_[START] = 0;
137 Text_spanner_engraver::acknowledge_grob (Grob_info info)
139 if (span_ && Note_column::has_interface (info.elem_l_))
141 Side_position::add_support (span_, info.elem_l_);
142 add_bound_item (span_, dynamic_cast<Item*> (info.elem_l_));
147 Text_spanner_engraver::typeset_all ()
151 Side_position::add_staff_support (finished_);
152 typeset_grob (finished_);
158 Text_spanner_engraver::stop_translation_timestep ()
164 Text_spanner_engraver::finalize ()
169 current_req_->origin ()->warning (_ ("unterminated text spanner"));