source file of the GNU LilyPond music typesetter
- (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "engraver.hh"
#include "translator-group.hh"
-#include "volta-spanner.hh"
+#include "volta-bracket.hh"
#include "item.hh"
#include "note-column.hh"
-#include "bar.hh"
+#include "bar-line.hh"
#include "side-position-interface.hh"
+#include "warn.hh"
+#include "staff-symbol.hh"
/*
Create Volta spanners, by reading repeatCommands property, usually
class Volta_engraver : public Engraver
{
public:
- Volta_engraver();
- VIRTUAL_COPY_CONS(Translator);
+ TRANSLATOR_DECLARATIONS(Volta_engraver);
protected:
- virtual void acknowledge_element (Score_element_info);
- virtual void do_removal_processing ();
- virtual void do_pre_move_processing ();
- virtual void do_process_music ();
-
+ virtual void acknowledge_grob (Grob_info);
+ virtual void finalize ();
+ virtual void stop_translation_timestep ();
+ virtual void process_music ();
+
Moment started_mom_;
- Spanner * volta_span_p_;
- Spanner* end_volta_span_p_;
-};
+ Spanner *volta_span_;
+ Spanner *end_volta_span_;
+ SCM staff_;
+ SCM start_string_;
-ADD_THIS_TRANSLATOR(Volta_engraver);
+ bool staff_eligible ();
+
+};
Volta_engraver::Volta_engraver ()
{
- volta_span_p_ = 0;
- end_volta_span_p_ = 0;
+ staff_ = SCM_EOL;
+ volta_span_ = 0;
+ end_volta_span_ = 0;
+}
+
+
+/*
+ TODO: this logic should be rewritten, it is buggy.
+
+ One of the problems is that we can't determine wether or not to
+ print the volta bracket during the first step, since that requires
+ acknowledging the staff.
+ */
+bool
+Volta_engraver::staff_eligible ()
+{
+ /*
+ UGH.
+ */
+ if (!unsmob_grob (staff_))
+ return true;
+
+ if (!to_boolean (get_property ("voltaOnThisStaff")))
+ {
+ /*
+ TODO: this does weird things when you open a piece with a
+ volta spanner.
+
+ */
+ SCM staffs = get_property ("stavesFound");
+
+ /*
+ only put a volta on the top staff.
+
+ May be this is a bit convoluted, and we should have a single
+ volta engraver in score context or somesuch.
+
+ */
+ if (!gh_pair_p (staffs))
+ {
+ programming_error ("Huh? Volta engraver can't find staffs?");
+ return false;
+ }
+ else if (ly_car (scm_last_pair (staffs)) != staff_)
+ {
+ return false;
+ }
+ }
+ return true;
}
void
-Volta_engraver::do_process_music ()
+Volta_engraver::process_music ()
{
SCM cs = get_property ("repeatCommands");
- SCM str = SCM_EOL;
- bool end = false;
+ if (!staff_eligible ())
+ return ;
+
+
+ bool end = false;
+ start_string_ = SCM_EOL;
while (gh_pair_p (cs))
{
- SCM c = gh_car (cs);
+ SCM c = ly_car (cs);
- if (gh_pair_p (c) && gh_car (c) == ly_symbol2scm ("volta"))
+ if (gh_pair_p (c)
+ && ly_car (c) == ly_symbol2scm ("volta")
+ && gh_pair_p (ly_cdr (c)))
{
- if (gh_cadr (c) == SCM_BOOL_F)
+ if (ly_cadr (c) == SCM_BOOL_F)
end = true;
else
- str = gh_cadr (c);
+ start_string_ = ly_cadr (c);
}
- cs = gh_cdr (cs);
+ cs = ly_cdr (cs);
}
- SCM l (get_property ("voltaSpannerDuration"));
- Moment now = now_mom ();
+ if (volta_span_)
+ {
+ SCM l (get_property ("voltaSpannerDuration"));
+ Moment now = now_mom ();
- bool early_stop = volta_span_p_ && unsmob_moment (l)
- &&*unsmob_moment (l) <= now - started_mom_;
+ bool early_stop = unsmob_moment (l)
+ && *unsmob_moment (l) <= now - started_mom_;
+
+ end = end || early_stop;
+ }
- if (end || early_stop)
+
+ if (end && !volta_span_)
{
- end_volta_span_p_ = volta_span_p_;
- volta_span_p_ =0;
-
- /*
- maybe do typeset_element () directly?
- */
-
- if (!gh_string_p (str))
- end_volta_span_p_->set_elt_property ("last-volta", SCM_BOOL_T);
+ warning (_ ("No volta spanner to end")); // fixme: be more verbose.
+ }
+ else if (end)
+ {
+ end_volta_span_ = volta_span_;
+ volta_span_ =0;
}
- if (gh_string_p (str))
+ if (volta_span_ &&
+ (gh_string_p (start_string_) || gh_pair_p (start_string_)))
{
- started_mom_ = now;
- if (volta_span_p_)
+ warning (_ ("Already have a volta spanner. Stopping that one prematurely."));
+
+ if (end_volta_span_)
{
- warning (_ ("Already have a volta spanner. Stopping that one prematurely."));
-
- if (end_volta_span_p_)
- {
- warning (_("Also have a stopped spanner. Giving up."));
+ warning (_ ("Also have a stopped spanner. Giving up."));
+ return ;
+ }
- return ;
+ end_volta_span_ = volta_span_;
+ volta_span_ = 0;
+ }
- }
+ if (!volta_span_ &&
+ (gh_string_p (start_string_) || gh_pair_p (start_string_)))
+ {
+ started_mom_ = now_mom () ;
-
- end_volta_span_p_ = volta_span_p_;
- volta_span_p_ = 0;
- }
+ volta_span_ = make_spanner ("VoltaBracket");
- volta_span_p_ = new Spanner (get_property ("basicVoltaBracketProperties"));
- Volta_spanner::set_interface (volta_span_p_);
- announce_element (volta_span_p_,0);
- volta_span_p_->set_elt_property ("text", str);
+ announce_grob (volta_span_, SCM_EOL);
+ volta_span_->set_grob_property ("text", start_string_);
}
}
+
void
-Volta_engraver::acknowledge_element (Score_element_info i)
+Volta_engraver::acknowledge_grob (Grob_info i)
{
- if (Item* item = dynamic_cast<Item*> (i.elem_l_))
+ if (Item* item = dynamic_cast<Item*> (i.grob_))
{
if (Note_column::has_interface (item))
{
- if (volta_span_p_)
- Volta_spanner::add_column (volta_span_p_,item);
- if (end_volta_span_p_)
- Volta_spanner::add_column (end_volta_span_p_,item);
+ if (volta_span_)
+ Volta_bracket_interface::add_column (volta_span_,item);
}
- if (Bar::has_interface (item))
+ if (Bar_line::has_interface (item))
{
- if (volta_span_p_)
- Volta_spanner::add_bar (volta_span_p_, item);
- if (end_volta_span_p_)
- Volta_spanner::add_bar(end_volta_span_p_ , item);
+ if (volta_span_)
+ Volta_bracket_interface::add_bar (volta_span_, item);
+ if (end_volta_span_)
+ Volta_bracket_interface::add_bar (end_volta_span_ , item);
}
}
+ else if (Staff_symbol::has_interface (i.grob_))
+ {
+ /*
+ We only want to know about a single staff: then we add to the
+ support. */
+ if (staff_ != SCM_EOL)
+ staff_ = SCM_UNDEFINED;
+
+ if (staff_ != SCM_UNDEFINED)
+ staff_ = i.grob_->self_scm();
+ }
}
void
-Volta_engraver::do_removal_processing ()
+Volta_engraver::finalize ()
{
- if (volta_span_p_)
+ if (volta_span_)
{
- typeset_element(volta_span_p_);
+ typeset_grob (volta_span_);
}
- if (end_volta_span_p_)
+ if (end_volta_span_)
{
- typeset_element (end_volta_span_p_);
+ typeset_grob (end_volta_span_);
}
}
+
+
void
-Volta_engraver::do_pre_move_processing ()
+Volta_engraver::stop_translation_timestep ()
{
- if (end_volta_span_p_)
+ if (volta_span_ && !staff_eligible ())
{
- Side_position::add_staff_support (end_volta_span_p_);
+ /*
+ THIS IS A KLUDGE.
+
+ we need to do this here, because STAFF_ is not initialized yet
+ in the 1st call of process_music()
+ */
- typeset_element (end_volta_span_p_ );
- end_volta_span_p_ =0;
+ volta_span_->suicide( );
+ volta_span_ = 0;
+ }
+
+ if (end_volta_span_)
+ {
+ typeset_grob (end_volta_span_);
+ end_volta_span_ =0;
}
}
+
+/*
+ TODO: should attach volta to paper-column if no bar is found.
+ */
+
+ENTER_DESCRIPTION(Volta_engraver,
+/* descr */ "Make volta brackets",
+/* creats*/ "VoltaBracket",
+/* accepts */ "",
+/* acks */ "bar-line-interface staff-symbol-interface note-column-interface",
+/* reads */ "repeatCommands voltaSpannerDuration stavesFound",
+/* write */ "");
projects / lilypond.git / blobdiff