2 text-spanner-engraver.cc -- implement Text_spanner_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2003 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "dimensions.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 TRANSLATOR_DECLARATIONS(Text_spanner_engraver);
27 virtual void finalize ();
28 virtual void acknowledge_grob (Grob_info);
29 virtual bool try_music (Music *);
30 virtual void stop_translation_timestep ();
31 virtual void start_translation_timestep ();
32 virtual void process_music ();
38 Drul_array<Music*> req_drul_;
43 Text_spanner_engraver::Text_spanner_engraver ()
53 Text_spanner_engraver::start_translation_timestep ()
60 Text_spanner_engraver::try_music (Music *m)
62 if (m->is_mus_type ("text-span-event"))
65 Direction d = to_dir (m->get_mus_property ("span-direction"));
69 else if (m->is_mus_type ("abort-event"))
82 Text_spanner_engraver::process_music ()
88 req_drul_[STOP]->origin ()->warning
89 (_ ("can't find start of text spanner"));
103 req_drul_[START]->origin ()->warning(_ ("already have a text spanner"));
107 current_req_ = req_drul_[START];
108 span_ = new Spanner (get_property ("TextSpanner"));
110 /* Ugh. Reset (de)cresc. specific properties */
111 span_->set_grob_property ("outer", SCM_BOOL_T);
112 span_->set_grob_property ("if-text-padding", gh_double2scm (0));
113 span_->set_grob_property ("width-correct", gh_double2scm (0));
115 Side_position_interface::set_axis (span_, Y_AXIS);
116 announce_grob (span_, req_drul_[START]->self_scm());
117 req_drul_[START] = 0;
123 Text_spanner_engraver::acknowledge_grob (Grob_info info)
125 Spanner * spans[2] ={span_, finished_};
126 for (int i = 0; i < 2 ; i++)
128 if (spans[i] && Note_column::has_interface (info.grob_))
130 Side_position_interface::add_support (spans[i], info.grob_);
131 add_bound_item (spans[i], dynamic_cast<Item*> (info.grob_));
137 Text_spanner_engraver::typeset_all ()
141 Side_position_interface::add_staff_support (finished_);
142 if (!finished_->get_bound (RIGHT))
144 Grob* e = unsmob_grob (get_property ("currentMusicalColumn"));
145 finished_->set_bound (RIGHT, e);
147 typeset_grob (finished_);
153 Text_spanner_engraver::stop_translation_timestep ()
155 if (span_ && !span_->get_bound (LEFT))
157 Grob* e = unsmob_grob (get_property ("currentMusicalColumn"));
158 span_->set_bound (LEFT, e);
165 Text_spanner_engraver::finalize ()
170 current_req_->origin ()->warning (_ ("unterminated text spanner"));
176 ENTER_DESCRIPTION(Text_spanner_engraver,
177 /* descr */ "Create text spanner from a Music.",
178 /* creats*/ "TextSpanner",
179 /* accepts */ "text-span-event",
180 /* acks */ "note-column-interface",