source file of the GNU LilyPond music typesetter
- (c) 2000--2002 Jan Nieuwenhuizen <janneke@gnu.org>
- */
+ (c) 2000--2004 Jan Nieuwenhuizen <janneke@gnu.org>
+
+ Chris Jackson <chris@fluffhouse.org.uk> - extended to support
+ bracketed pedals.
+*/
#include "engraver.hh"
-#include "musical-request.hh"
+#include "event.hh"
#include "grob.hh"
#include "item.hh"
#include "lily-guile.hh"
-#include "rhythmic-head.hh"
-#include "stem.hh"
#include "side-position-interface.hh"
#include "staff-symbol-referencer.hh"
#include "item.hh"
+#include "axis-group-interface.hh"
+#include "translator-group.hh"
+#include "directional-element-interface.hh"
+#include "note-column.hh"
+#include "warn.hh"
+
+/*
+ Urgh. This engraver is too complex. rewrite. --hwn
+
+*/
+
+struct Pedal_info
+{
+ char const * name_;
+
+ /*
+ Event for currently running pedal.
+ */
+ Music* current_bracket_ev_;
+
+ /*
+ Event for currently starting pedal, (necessary?
+
+ distinct from current_bracket_ev_, since current_bracket_ev_ only
+ necessary for brackets, not for text style.
+ */
+ Music* start_ev_;
+
+
+
+ /*
+ Events that were found in this timestep.
+ */
+ Drul_array<Music*> event_drul_;
+ Item* item_;
+ Spanner* bracket_; // A single portion of a pedal bracket
+ Spanner* finished_bracket_;
+
+ /*
+ This grob contains all the pedals of the same type on the same staff
+ */
+ Spanner* line_spanner_;
+ Spanner* finished_line_spanner_;
+};
+
class Piano_pedal_engraver : public Engraver
{
public:
- TRANSLATOR_DECLARATIONS(Piano_pedal_engraver);
+ TRANSLATOR_DECLARATIONS (Piano_pedal_engraver);
~Piano_pedal_engraver ();
protected:
virtual void initialize ();
+ virtual void finalize ();
virtual bool try_music (Music*);
virtual void stop_translation_timestep ();
- virtual void start_translation_timestep ();
virtual void acknowledge_grob (Grob_info);
- virtual void create_grobs ();
+ virtual void process_music ();
private:
- struct Pedal_info
- {
- char const * name_;
- Span_req* start_req_l_;
- Drul_array<Span_req*> req_l_drul_;
- Item* item_p_;
- };
-
Pedal_info *info_list_;
-};
+ /*
+ Record a stack of the current pedal spanners, so if more than one pedal
+ occurs simultaneously then extra space can be added between them.
+ */
+
+ Link_array<Spanner> previous_;
+
+ void create_text_grobs (Pedal_info *p, bool);
+ void create_bracket_grobs (Pedal_info *p, bool);
+ void typeset_all ();
+};
Piano_pedal_engraver::Piano_pedal_engraver ()
{
info_list_ = 0;
}
+
void
Piano_pedal_engraver::initialize ()
{
- info_list_ = new Pedal_info[4];
- Pedal_info *p = info_list_;
-
+ previous_.clear ();
char * names [] = { "Sostenuto", "Sustain", "UnaCorda", 0 };
+
+ info_list_ = new Pedal_info[sizeof (names)/ sizeof (const char*)];
+ Pedal_info *p = info_list_;
+
char **np = names ;
do
{
p->name_ = *np;
- p->item_p_ = 0;
- p->req_l_drul_[START] = 0;
- p->req_l_drul_[STOP] = 0;
- p->start_req_l_ = 0;
+ p->item_ = 0;
+ p->bracket_ = 0;
+ p->finished_bracket_ = 0;
+ p->line_spanner_ = 0;
+ p->finished_line_spanner_ = 0;
+ p->current_bracket_ev_ = 0;
+ p->event_drul_[START] = 0;
+ p->event_drul_[STOP] = 0;
+ p->start_ev_ = 0;
p++;
}
{
for (Pedal_info*p = info_list_; p && p->name_; p ++)
{
- if (p->item_p_)
+ if (Note_column::has_interface (info.grob_))
{
- if (Rhythmic_head::has_interface (info.grob_l_))
+ if (p->line_spanner_)
{
- Side_position_interface::add_support (p->item_p_, info.grob_l_);
-
- if (Side_position_interface::get_axis (p->item_p_) == X_AXIS
- && !p->item_p_->get_parent (Y_AXIS))
- p->item_p_->set_parent (info.grob_l_, Y_AXIS);
- }
- if (Stem::has_interface (info.grob_l_))
- {
- Side_position_interface::add_support (p->item_p_,info.grob_l_);
- }
+ Side_position_interface::add_support (p->line_spanner_, info.grob_);
+ add_bound_item (p->line_spanner_,info.grob_);
+ }
+ if (p->bracket_)
+ add_bound_item (p->bracket_,info.grob_);
+ if (p->finished_bracket_)
+ add_bound_item (p->finished_bracket_,info.grob_);
}
}
}
bool
Piano_pedal_engraver::try_music (Music *m)
{
- if (Span_req * s = dynamic_cast<Span_req*> (m))
+ if (m->is_mus_type ("pedal-event"))
{
for (Pedal_info*p = info_list_; p->name_; p ++)
{
- if (scm_equal_p (s->get_mus_property ("span-type"),
- ly_str02scm (p->name_))==SCM_BOOL_T)
+ String nm = p->name_ + String ("Event");
+ if (gh_equal_p (m->get_mus_property ("name") ,
+ gh_symbol2scm (nm.to_str0())))
{
- p->req_l_drul_[s->get_span_dir ()] = s;
+ Direction d = to_dir (m->get_mus_property ("span-direction"));
+ p->event_drul_[d] = m;
return true;
}
}
}
void
-Piano_pedal_engraver::create_grobs ()
+Piano_pedal_engraver::process_music ()
{
for (Pedal_info*p = info_list_; p && p->name_; p ++)
{
- if (p->item_p_ || ! (p->req_l_drul_[STOP] || p->req_l_drul_[START]))
- continue;
+ if (p->event_drul_[STOP] || p->event_drul_[START])
+ {
+ if (!p->line_spanner_)
+ {
+ String name = String (p->name_) + "PedalLineSpanner";
+ p->line_spanner_ = make_spanner (name.to_str0 ());
+
+ Music * rq = (p->event_drul_[START] ? p->event_drul_[START] : p->event_drul_[STOP]);
+ announce_grob (p->line_spanner_, rq->self_scm ());
+ }
- SCM s = SCM_EOL;
- SCM strings = get_property (("pedal" + String (p->name_) + "Strings").ch_C ());
- if (scm_ilength (strings) < 3)
- continue;
+ /* Choose the appropriate grobs to add to the line spanner
+ These can be text items or text-spanners
+ */
+
+ /*
+ ugh, code dup, should read grob to create from other
+ property.
+
+ bracket: |_________/\____|
+ text: Ped. *Ped. *
+ mixed: Ped. _____/\____|
+ */
+
+
+ String prop = String ("pedal") + p->name_ + "Style";
+ SCM style = get_property (prop.to_str0 ());
+ bool mixed = style == ly_symbol2scm ("mixed");
+ if (style == ly_symbol2scm ("text") ||
+ mixed)
+ {
+ if (! p->item_)
+ create_text_grobs (p, mixed);
+ }
+ if (style == ly_symbol2scm ("bracket") ||
+ mixed)
+ {
+ create_bracket_grobs (p, mixed);
+ }
+ }
+ }
+}
+
+void
+Piano_pedal_engraver::create_text_grobs (Pedal_info *p, bool mixed)
+{
+ SCM s = SCM_EOL;
+ SCM strings = get_property ( ("pedal" + String (p->name_) + "Strings").to_str0 ());
+
+ if (scm_ilength (strings) < 3)
+ {
+ Music * m = p->event_drul_[START];
+ if (!m) m = p->event_drul_ [STOP];
+
+ String msg = _ ("Need 3 strings for piano pedals. No pedal made. ");
+ if (m)
+ m->origin()->warning (msg);
+ else
+ warning (msg);
- if (p->req_l_drul_[STOP] && p->req_l_drul_[START])
+ return ;
+ }
+
+ if (p->event_drul_[STOP] && p->event_drul_[START])
+ {
+ if (!mixed)
{
- if (!p->start_req_l_)
+ if (!p->start_ev_)
{
- p->req_l_drul_[STOP]->origin ()->warning (_f ("can't find start of piano pedal: `%s'", p->name_));
+ p->event_drul_[STOP]->origin ()->warning (_f ("can't find start of piano pedal: `%s'", p->name_));
}
else
{
s = ly_cadr (strings);
}
- p->start_req_l_ = p->req_l_drul_[START];
+ p->start_ev_ = p->event_drul_[START];
}
- else if (p->req_l_drul_[STOP])
+ }
+ else if (p->event_drul_[STOP])
+ {
+ if (!mixed)
{
- if (!p->start_req_l_)
+ if (!p->start_ev_)
{
- p->req_l_drul_[STOP]->origin ()->warning (_f ("can't find start of piano pedal: `%s'", p->name_));
+ p->event_drul_[STOP]->origin ()->warning (_f ("can't find start of piano pedal: `%s'", p->name_));
}
else
{
s = ly_caddr (strings);
+ if (previous_.size ())
+ previous_.pop();
}
- p->start_req_l_ = 0;
+ p->start_ev_ = 0;
}
- else if (p->req_l_drul_[START])
+ }
+ else if (p->event_drul_[START])
+ {
+ p->start_ev_ = p->event_drul_[START];
+ s = ly_car (strings);
+ if (!mixed)
{
- p->start_req_l_ = p->req_l_drul_[START];
- s = ly_car (strings);
+ /*
+ Code dup?! see below.
+ */
+ if (previous_.size ())
+ // add extra space below the previous already-occuring pedal
+ Side_position_interface::add_support (p->line_spanner_,
+ previous_.top ());
+ previous_.push ( p->line_spanner_);
}
+ }
+
+ if (gh_string_p (s))
+ {
+ String propname = String (p->name_) + "Pedal";
- if (gh_string_p (s))
+ p->item_ = make_item (propname.to_str0 ());
+ p->item_->set_grob_property ("text", s);
+ Axis_group_interface::add_element (p->line_spanner_, p->item_);
+
+ announce_grob (p->item_,
+ (p->event_drul_[START]
+ ? p->event_drul_[START]
+ : p->event_drul_[STOP])->self_scm ());
+ }
+
+ if (!mixed)
+ {
+ p->event_drul_[START] = 0;
+ p->event_drul_[STOP] = 0;
+ }
+}
+
+void
+Piano_pedal_engraver::create_bracket_grobs (Pedal_info *p, bool mixed)
+{
+ if (!p->bracket_ && p->event_drul_[STOP])
+ {
+ String msg =_f ("can't find start of piano pedal bracket: `%s'", p->name_);
+ p->event_drul_[STOP]->origin ()->warning (msg);
+ p->event_drul_[STOP] = 0;
+ }
+
+ if (p->event_drul_[STOP])
+ {
+ if (!p->event_drul_[START])
{
- String propname = String (p->name_) + "Pedal";
- p->item_p_ = new Item (get_property (propname.ch_C ()));
- p->item_p_->set_grob_property ("text", s);
+ if (previous_.size())
+ previous_.pop();
+ }
+
+ assert (!p->finished_bracket_);
+ Grob *cmc = unsmob_grob (get_property ("currentMusicalColumn"));
- Music * c = p->req_l_drul_[START]
- ? p->req_l_drul_[START]
- : p->req_l_drul_[STOP];
- announce_grob (p->item_p_, c ? c->self_scm() : SCM_EOL);
-
+ if (!p->bracket_->get_bound (RIGHT))
+ p->bracket_->set_bound (RIGHT, cmc);
+
+ /*
+ Set properties so that the stencil-creating function will
+ know whether the right edge should be flared ___/
+ */
+
+ if (!p->event_drul_[START])
+ {
+ SCM flare = p->bracket_->get_grob_property ("bracket-flare");
+ p->bracket_->set_grob_property ("bracket-flare", scm_cons (gh_car (flare),
+ gh_double2scm (0)));
+ }
+
+ p->finished_bracket_ = p->bracket_;
+ p->bracket_ = 0;
+ p->current_bracket_ev_ = 0;
+ }
+
+ if (p->event_drul_[START])
+ {
+ p->start_ev_ = p->event_drul_[START];
+ p->current_bracket_ev_ = p->event_drul_[START];
+
+ p->bracket_ = make_spanner ("PianoPedalBracket");
+
+ /*
+ Set properties so that the stencil-creating function will
+ know whether the left edge should be flared \___
+ */
+
+ if (!p->finished_bracket_)
+ {
+ SCM flare = p->bracket_->get_grob_property ("bracket-flare");
+ p->bracket_->set_grob_property ("bracket-flare", scm_cons (gh_double2scm (0),gh_cdr (flare)));
+ }
+
+
+ /* Set this property for 'mixed style' pedals, Ped._______/\ ,
+ so the stencil function will shorten the ____ line by the length of the Ped. text.
+ */
+
+ if (mixed)
+ {
+ /*
+ Mixed style: Store a pointer to the preceding text for use in
+ calculating the length of the line
+
+
+ TODO:
+
+ WTF is pedal-text not the bound of the object? --hwn
+ */
+ if (p->item_)
+ p->bracket_->set_grob_property ("pedal-text", p->item_->self_scm ());
+ }
+
+
+ /*
+ We do not use currentMusicalColumn for the left span-point.
+ If the column as accidentals (eg on a different stave), the
+ currentMusicalColumn is too wide, making the bracket too big.
+
+ TODO:
+
+ Hmm. What do we do when there are no notes when the spanner starts?
+
+ TODO:
+
+ what about the right span point?
+
+ */
+ Axis_group_interface::add_element (p->line_spanner_, p->bracket_);
+ announce_grob (p->bracket_, p->event_drul_[START]->self_scm ());
+
+ if (!p->event_drul_[STOP])
+ {
+
+ /*
+ code dup. --hwn.
+
+ // position new pedal spanner below the current one
+ */
+ if (previous_.size())
+ Side_position_interface::add_support (p->line_spanner_, previous_.top());
+
+ previous_.push (p->line_spanner_);
+ }
+ }
+
+ p->event_drul_[START] = 0;
+ p->event_drul_[STOP] = 0;
+}
+
+void
+Piano_pedal_engraver::finalize ()
+{
+ for (Pedal_info*p = info_list_; p && p->name_; p ++)
+ {
+ /*
+ suicide?
+ */
+ if (p->line_spanner_
+ && !p->line_spanner_->live())
+ p->line_spanner_ = 0;
+
+ if (p->line_spanner_)
+ {
+ p->finished_line_spanner_ = p->line_spanner_;
+ typeset_all ();
+ }
+ if (p->bracket_
+ && !p->bracket_->live())
+ p->bracket_ = 0;
+
+ if (p->bracket_)
+ {
+ p->current_bracket_ev_->origin ()->warning (_ ("unterminated pedal bracket"));
+ p->bracket_->suicide ();
+ p->bracket_ = 0;
}
- p->req_l_drul_[START] = 0;
- p->req_l_drul_[STOP] = 0;
}
}
+
void
Piano_pedal_engraver::stop_translation_timestep ()
{
- Item * sustain = 0;
+ for (Pedal_info*p = info_list_; p && p->name_; p ++)
+ {
+ if (!p->bracket_)
+ {
+ p->finished_line_spanner_ = p->line_spanner_;
+ p->line_spanner_ = 0;
+ }
+ }
+
+ typeset_all ();
+
for (Pedal_info*p = info_list_; p->name_; p ++)
{
- if (p->name_ == String ("Sustain"))
- sustain = p->item_p_;
+ p->event_drul_[STOP] = 0;
+ p->event_drul_[START] = 0;
}
+}
+
+void
+Piano_pedal_engraver::typeset_all ()
+{
+ Item * sustain = 0;
for (Pedal_info*p = info_list_; p->name_; p ++)
{
- if (p->item_p_)
+ /*
+ Handle suicide.
+ */
+ if (p->finished_line_spanner_
+ && !p->finished_line_spanner_->live ())
+ p->finished_line_spanner_ = 0;
+ if (p->finished_bracket_
+ && !p->finished_bracket_->live())
+ p->finished_bracket_ = 0;
+
+
+ if (p->name_ == String ("Sustain"))
+ sustain = p->item_;
+
+ if (p->item_)
{
- Side_position_interface::add_staff_support (p->item_p_);
-
/*
Hmm.
*/
- if (p->name_ != String ("Sustain"))
+ if (p->name_ != String ("Sustain") && sustain)
{
- if (sustain)
- {
- Side_position_interface::add_support (p->item_p_,sustain);
- }
+ Side_position_interface::add_support (p->item_,sustain);
}
- typeset_grob (p->item_p_);
+ typeset_grob (p->item_);
+ p->item_ = 0;
}
- p->item_p_ = 0;
- }
-}
+
+ if (p->finished_bracket_)
+ {
+ Grob * r = p->finished_bracket_->get_bound (RIGHT);
+ if (!r)
+ {
+ p->finished_bracket_->set_bound (RIGHT, unsmob_grob (get_property ("currentMusicalColumn")));
+ }
-void
-Piano_pedal_engraver::start_translation_timestep ()
-{
- for (Pedal_info*p = info_list_; p->name_; p ++)
- {
- p->req_l_drul_[STOP] = 0;
- p->req_l_drul_[START] = 0;
+ typeset_grob (p->finished_bracket_);
+
+ p->finished_bracket_ =0;
+ }
+
+ if (p->finished_line_spanner_)
+ {
+ Grob * l = p->finished_line_spanner_->get_bound (LEFT);
+ Grob * r = p->finished_line_spanner_->get_bound (RIGHT);
+ if (!r && l)
+ p->finished_line_spanner_->set_bound (RIGHT, l);
+ else if (!l && r)
+ p->finished_line_spanner_->set_bound (LEFT, r);
+ else if (!r && !l)
+ {
+ Grob * cc = unsmob_grob (get_property ("currentMusicalColumn"));
+ Item * ci = dynamic_cast<Item*> (cc);
+ p->finished_line_spanner_->set_bound (RIGHT, ci);
+ p->finished_line_spanner_->set_bound (LEFT, ci);
+ }
+ typeset_grob (p->finished_line_spanner_);
+ p->finished_line_spanner_ = 0;
+ }
}
}
-ENTER_DESCRIPTION(Piano_pedal_engraver,
-/* descr */ "Engrave piano pedal symbols.",
-/* creats*/ "SostenutoPedal SustainPedal UnaCordaPedal",
-/* acks */ "rhythmic-head-interface stem-interface",
-/* reads */ "pedalSostenutoStrings pedalSustainStrings pedalUnaCordaStrings",
+
+ENTER_DESCRIPTION (Piano_pedal_engraver,
+/* descr */ "Engrave piano pedal symbols and brackets.",
+/* creats*/ "SostenutoPedal SustainPedal UnaCordaPedal SostenutoPedalLineSpanner SustainPedalLineSpanner UnaCordaPedalLineSpanner",
+/* accepts */ "pedal-event",
+/* acks */ "note-column-interface",
+/* reads */ "pedalSostenutoStrings pedalSustainStrings pedalUnaCordaStrings pedalSostenutoStyle pedalSustainStyle pedalUnaCordaStyle",
/* write */ "");
projects / lilypond.git / blobdiff