2 extender-engraver.cc -- implement Extender_engraver
4 (c) 1999 Glen Prideaux <glenprideaux@iname.com>,
5 Han-Wen Nienhuys, Jan Nieuwenhuizen.
10 #include "musical-request.hh"
11 #include "extender-spanner.hh"
12 #include "paper-column.hh"
13 #include "text-item.hh"
14 #include "engraver.hh"
15 #include "drul-array.hh"
16 #include "extender-spanner.hh"
21 Generate an centred extender. Should make a Extender_spanner that
22 typesets a nice centred extender of varying length depending on the
23 gap between syllables.
25 We remember the last Text_item that come across. When we get a
26 request, we create the spanner, and attach the left point to the
27 last lyrics, and the right point to any lyrics we receive by
29 class Extender_engraver : public Engraver
31 Text_item * last_lyric_l_;
32 Text_item * current_lyric_l_;
34 Lyric_extender* extender_spanner_p_;
37 VIRTUAL_COPY_CONS (Translator);
40 virtual void acknowledge_element (Score_element_info);
41 virtual void do_removal_processing();
42 virtual void do_process_music();
43 virtual bool do_try_music (Music*);
44 virtual void do_pre_move_processing();
45 virtual void do_post_move_processing ();
51 ADD_THIS_TRANSLATOR (Extender_engraver);
53 Extender_engraver::Extender_engraver ()
57 extender_spanner_p_ = 0;
62 Extender_engraver::acknowledge_element (Score_element_info i)
64 if (Text_item* t = dynamic_cast<Text_item*> (i.elem_l_))
67 if (extender_spanner_p_
68 && !extender_spanner_p_->get_bound (RIGHT)
71 extender_spanner_p_->set_textitem (RIGHT, t);
78 Extender_engraver::do_try_music (Music* r)
80 if (Extender_req* p = dynamic_cast <Extender_req *> (r))
92 Extender_engraver::do_removal_processing ()
94 if (extender_spanner_p_)
96 req_l_->warning (_ ("unterminated extender"));
97 extender_spanner_p_->set_bound(RIGHT, get_staff_info ().command_pcol_l ());
102 Extender_engraver::do_process_music ()
108 req_l_->warning (_ ("Nothing to connect extender to on the left. Ignoring extender request."));
112 extender_spanner_p_ = new Lyric_extender (get_property ("basicLyricExtenderProperties"));
113 extender_spanner_p_->set_textitem (LEFT, last_lyric_l_);
114 announce_element (Score_element_info (extender_spanner_p_, req_l_));
120 Extender_engraver::do_pre_move_processing ()
122 if (extender_spanner_p_)
124 typeset_element (extender_spanner_p_);
125 extender_spanner_p_ = 0;
128 if (current_lyric_l_)
130 last_lyric_l_ = current_lyric_l_;
136 Extender_engraver::do_post_move_processing ()