--- /dev/null
+/*
+ local-key-engraver.cc -- implement accidental_engraver
+
+ (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+
+#include "musical-request.hh"
+#include "command-request.hh"
+#include "local-key-item.hh"
+#include "item.hh"
+#include "tie.hh"
+#include "rhythmic-head.hh"
+#include "timing-translator.hh"
+#include "engraver-group-engraver.hh"
+
+#include "staff-symbol-referencer.hh"
+#include "side-position-interface.hh"
+#include "engraver.hh"
+#include "arpeggio.hh"
+
+/**
+
+
+ FIXME: should not compute vertical positioning of accidentals, but
+ get them from the noteheads
+
+ The algorithm for accidentals should be documented, and made
+ tweakable.
+
+*/
+
+
+struct Accidental_engraver : Engraver {
+ Item *key_item_p_;
+protected:
+ TRANSLATOR_DECLARATIONS(Accidental_engraver);
+ virtual void process_music ();
+ virtual void acknowledge_grob (Grob_info);
+ virtual void stop_translation_timestep ();
+ virtual void initialize ();
+ virtual void create_grobs ();
+ virtual void finalize ();
+public:
+
+ // todo -> property
+ SCM last_keysig_;
+
+ /*
+ Urgh. Since the accidentals depend on lots of variables, we have to
+ store all information before we can really create the accidentals.
+ */
+ Link_array<Grob> arpeggios_;
+
+ Link_array<Note_req> mel_l_arr_;
+ Link_array<Grob> support_l_arr_;
+ Link_array<Item> forced_l_arr_;
+ Link_array<Grob> tie_l_arr_;
+
+};
+
+Accidental_engraver::Accidental_engraver ()
+{
+ key_item_p_ =0;
+ last_keysig_ = SCM_EOL;
+}
+
+void
+Accidental_engraver::initialize ()
+{
+ last_keysig_ = get_property ("keySignature");
+ daddy_trans_l_->set_property ("localKeySignature", last_keysig_);
+}
+
+void
+Accidental_engraver::create_grobs ()
+{
+ if (!key_item_p_ && mel_l_arr_.size ())
+ {
+ SCM localsig = get_property ("localKeySignature");
+
+ for (int i=0; i < mel_l_arr_.size (); i++)
+ {
+ Grob * support_l = support_l_arr_[i];
+ Note_req * note_l = mel_l_arr_[i];
+
+ int n = unsmob_pitch (note_l->get_mus_property ("pitch"))->notename_i_;
+ int o = unsmob_pitch (note_l->get_mus_property ("pitch"))->octave_i () ;
+ int a = unsmob_pitch (note_l->get_mus_property ("pitch"))->alteration_i_;
+
+ /* see if there's a tie that "changes" the accidental */
+ /* works because if there's a tie, the note to the left
+ is of the same pitch as the actual note */
+
+ SCM prev = scm_assoc (gh_cons (gh_int2scm (o), gh_int2scm (n)), localsig);
+ if (prev == SCM_BOOL_F)
+ prev = scm_assoc (gh_int2scm (n), localsig);
+ SCM prev_acc = (prev == SCM_BOOL_F) ? gh_int2scm (0) : ly_cdr (prev);
+ bool different = !gh_equal_p (prev_acc , gh_int2scm (a));
+ int p = gh_number_p (prev_acc) ? gh_scm2int (prev_acc) : 0;
+
+ Grob *tie_break_reminder = 0;
+ bool tie_changes = false;
+ for (int i=0; i < tie_l_arr_.size (); i++)
+ if (support_l == Tie::head (tie_l_arr_[i], RIGHT))
+ {
+ tie_changes = different;
+ /* Enable accidentals for broken tie
+
+ We only want an accidental on a broken tie,
+ if the tie changes the accidental.
+
+ Maybe check property noTieBreakForceAccidental? */
+ if (different)
+ tie_break_reminder = tie_l_arr_[i];
+ break;
+ }
+
+ /* When do we want accidentals:
+
+ 1. when property force-accidental is set, and not
+ tie_changes
+ 2. when different and not tie-changes
+ 3. maybe when at end of a tie: we must later see if
+ we're after a line break */
+ if (( (to_boolean (note_l->get_mus_property ("force-accidental"))
+ || different)
+ && !tie_changes)
+ || tie_break_reminder)
+ {
+ if (!key_item_p_)
+ {
+ key_item_p_ = new Item (get_property ("Accidentals"));
+ Local_key_item::set_interface (key_item_p_);
+
+
+ Staff_symbol_referencer::set_interface (key_item_p_);
+ SCM c0 = get_property ("centralCPosition");
+ if (gh_number_p (c0))
+ Staff_symbol_referencer::set_position (key_item_p_, gh_scm2int (c0));
+
+ announce_grob (key_item_p_, 0);
+ }
+
+
+ bool extra_natural =
+ sign (p) * (p - a) == 1
+ && abs (p) == 2;
+
+ Local_key_item::add_pitch (key_item_p_, *unsmob_pitch (note_l->get_mus_property ("pitch")),
+ to_boolean (note_l->get_mus_property ("cautionary")),
+ extra_natural,
+ tie_break_reminder);
+ Side_position_interface::add_support (key_item_p_,support_l);
+ }
+
+ /*
+ We should not record the accidental if it is the first
+ note and it is tied from the previous measure.
+
+ Checking whether it is tied also works mostly, but will it
+ always do the correct thing?
+
+ */
+ bool forget = to_boolean (get_property ("forgetAccidentals"));
+ if (tie_changes)
+ {
+ /*
+ Remember an alteration that is different both from
+ that of the tied note and of the key signature.
+
+ */
+ localsig = scm_assoc_set_x (localsig, gh_cons (gh_int2scm (o),
+ gh_int2scm (n)),
+ SCM_BOOL_T);
+
+ }
+ else if (!forget)
+ {
+ /*
+ not really really correct if there are more than one
+ noteheads with the same notename.
+ */
+ localsig = scm_assoc_set_x (localsig, gh_cons (gh_int2scm (o),
+ gh_int2scm (n)),
+ gh_int2scm (a));
+
+ }
+ }
+
+
+
+
+ daddy_trans_l_->set_property ("localKeySignature", localsig);
+ }
+
+
+ if (key_item_p_)
+ {
+ /*
+ Hmm. Which one has to be on the left?
+
+ On which left, code or paper?
+
+ (Arpeggios are engraved left of accidentals, of course.)
+ */
+ for (int i=0; i < arpeggios_.size (); i++)
+ Side_position_interface::add_support (arpeggios_[i], key_item_p_);
+
+ arpeggios_.clear ();
+ }
+}
+
+void
+Accidental_engraver::finalize ()
+{
+
+}
+
+void
+Accidental_engraver::stop_translation_timestep ()
+{
+ if (key_item_p_)
+ {
+ for (int i=0; i < support_l_arr_.size (); i++)
+ Side_position_interface::add_support (key_item_p_,support_l_arr_[i]);
+
+ typeset_grob (key_item_p_);
+ key_item_p_ =0;
+ }
+
+
+ mel_l_arr_.clear ();
+ arpeggios_.clear ();
+ tie_l_arr_.clear ();
+ support_l_arr_.clear ();
+ forced_l_arr_.clear ();
+}
+
+void
+Accidental_engraver::acknowledge_grob (Grob_info info)
+{
+ Note_req * note_l = dynamic_cast <Note_req *> (info.req_l_);
+
+ if (note_l && Rhythmic_head::has_interface (info.grob_l_))
+ {
+ mel_l_arr_.push (note_l);
+ support_l_arr_.push (info.grob_l_);
+ }
+ else if (Tie::has_interface (info.grob_l_))
+ {
+ tie_l_arr_.push (info.grob_l_);
+ }
+ else if (Arpeggio::has_interface (info.grob_l_))
+ {
+ arpeggios_.push (info.grob_l_);
+ }
+
+}
+
+/*
+ ugh. repeated deep_copy generates lots of garbage.
+ */
+void
+Accidental_engraver::process_music ()
+{
+ SCM smp = get_property ("measurePosition");
+ Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
+
+ SCM sig = get_property ("keySignature");
+
+ /*
+ Detect key sig changes. If we haven't found any, check if at start
+ of measure, and set localKeySignature anyhow. */
+ if (last_keysig_ != sig)
+ {
+ daddy_trans_l_->set_property ("localKeySignature", ly_deep_copy (sig));
+ last_keysig_ = sig;
+ }
+ else if (!mp.to_bool () )
+ {
+ if (!to_boolean (get_property ("noResetKey")))
+ daddy_trans_l_->set_property ("localKeySignature", ly_deep_copy (sig));
+ }
+}
+
+
+
+
+
+ENTER_DESCRIPTION(Accidental_engraver,
+/* descr */ "Make accidentals. Catches note heads, ties and notices key-change
+events. Due to interaction with ties (which don't come together
+with note heads), this needs to be in a context higher than Tie_engraver. FIXME",
+/* creats*/ "Accidentals",
+/* acks */ "rhythmic-head-interface tie-interface arpeggio-interface",
+/* reads */ "localKeySignature forgetAccidentals noResetKey",
+/* write */ "");
projects / lilypond.git / commitdiff