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 "note-column.hh"
11 #include "side-position-interface.hh"
12 #include "engraver.hh"
14 class Text_spanner_engraver : public Engraver
17 TRANSLATOR_DECLARATIONS(Text_spanner_engraver);
19 virtual void finalize ();
20 virtual void acknowledge_grob (Grob_info);
21 virtual bool try_music (Music *);
22 virtual void stop_translation_timestep ();
23 virtual void start_translation_timestep ();
24 virtual void process_music ();
30 Drul_array<Music*> req_drul_;
35 Text_spanner_engraver::Text_spanner_engraver ()
45 Text_spanner_engraver::start_translation_timestep ()
52 Text_spanner_engraver::try_music (Music *m)
54 if (m->is_mus_type ("text-span-event"))
57 Direction d = to_dir (m->get_mus_property ("span-direction"));
61 else if (m->is_mus_type ("abort-event"))
74 Text_spanner_engraver::process_music ()
80 req_drul_[STOP]->origin ()->warning
81 (_ ("can't find start of text spanner"));
95 req_drul_[START]->origin ()->warning(_ ("already have a text spanner"));
99 current_req_ = req_drul_[START];
100 span_ = new Spanner (get_property ("TextSpanner"));
103 /* Ugh. Reset (de)cresc. specific properties */
104 span_->set_grob_property ("enclose-bounds", SCM_BOOL_T);
105 span_->set_grob_property ("if-text-padding", gh_double2scm (0));
106 span_->set_grob_property ("width-correct", gh_double2scm (0));
109 Side_position_interface::set_axis (span_, Y_AXIS);
110 announce_grob (span_, req_drul_[START]->self_scm());
111 req_drul_[START] = 0;
117 Text_spanner_engraver::acknowledge_grob (Grob_info info)
119 Spanner * spans[2] ={span_, finished_};
120 for (int i = 0; i < 2 ; i++)
122 if (spans[i] && Note_column::has_interface (info.grob_))
124 Side_position_interface::add_support (spans[i], info.grob_);
125 add_bound_item (spans[i], dynamic_cast<Item*> (info.grob_));
131 Text_spanner_engraver::typeset_all ()
135 Side_position_interface::add_staff_support (finished_);
136 if (!finished_->get_bound (RIGHT))
138 Grob* e = unsmob_grob (get_property ("currentMusicalColumn"));
139 finished_->set_bound (RIGHT, e);
141 typeset_grob (finished_);
147 Text_spanner_engraver::stop_translation_timestep ()
149 if (span_ && !span_->get_bound (LEFT))
151 Grob* e = unsmob_grob (get_property ("currentMusicalColumn"));
152 span_->set_bound (LEFT, e);
159 Text_spanner_engraver::finalize ()
164 current_req_->origin ()->warning (_ ("unterminated text spanner"));
170 ENTER_DESCRIPTION(Text_spanner_engraver,
171 /* descr */ "Create text spanner from a Music.",
172 /* creats*/ "TextSpanner",
173 /* accepts */ "text-span-event",
174 /* acks */ "note-column-interface",