source file of the GNU LilyPond music typesetter
- (c) 2003 Juergen Reuter <reuter@ipd.uka.de>
+ (c) 2003 Juergen Reuter <reuter@ipd.uka.de>
*/
#include "gregorian-ligature-engraver.hh"
#include "paper-column.hh"
/*
- * TODO: This class shares some code with Mensural_ligature_engraver.
- * Maybe we should create a common super class "Rod_ligature_engraver"
- * and derive all shared code from it.
+ * This abstract class is the common superclass for all ligature
+ * engravers for Gregorian chant notation. It cares for the musical
+ * handling of the neumes, such as checking for valid combinations of
+ * neumes and providing context information. Notational aspects such
+ * as the glyphs to use or calculating the total width of a ligature,
+ * are left to the concrete subclass. Currently, there is only a
+ * single subclass, Vaticana_ligature_engraver. Other ligature
+ * engravers for Gregorian chant will be added in the future, such as
+ * Medicaea_ligature_engraver or Hufnagel_ligature_engraver.
*/
-
Gregorian_ligature_engraver::Gregorian_ligature_engraver ()
{
pes_or_flexa_req_ = 0;
}
-void
-Gregorian_ligature_engraver::transform_heads (Spanner *, Array<Grob_info>)
-{
- programming_error ("Gregorian_ligature_engraver::transform_heads (): "
- "this is an abstract method that should not be called, "
- "but overridden by a subclass");
-}
-
bool
Gregorian_ligature_engraver::try_music (Music *m)
{
return Ligature_engraver::try_music (m);
}
-/*
- * TODO: move this function to class Item?
- */
-void
-Gregorian_ligature_engraver::get_set_column (Item *item, Paper_column *column)
-{
- Item *parent = dynamic_cast<Item*> (item->get_parent (X_AXIS));
- if (!parent)
- {
- programming_error ("failed tweaking paper column in ligature");
- return;
- }
-
- String name = parent->name ();
- if (!String::compare (name, "PaperColumn"))
- {
- // Change column not only for targeted item (NoteColumn), but
- // also for all associated grobs (NoteSpacing, SeparationItem).
- Grob *sl = Staff_symbol_referencer::get_staff_symbol (item);
- for (SCM tail = parent->get_grob_property ("elements");
- gh_pair_p (tail);
- tail = ly_cdr (tail))
- {
- Item *sibling = unsmob_item (ly_car (tail));
- if ((sibling) &&
- (Staff_symbol_referencer::get_staff_symbol (sibling) == sl))
- {
- sibling->set_parent (column, X_AXIS);
- }
- }
- }
- else
- {
- get_set_column (parent, column);
- }
-}
-
void fix_prefix (char *name, int mask,
int *current_set, int min_set, int max_set,
Grob *primitive)
fix_prefix ("ascendens", ASCENDENS, current_set, min_set, max_set, primitive);
fix_prefix ("oriscus", ORISCUS, current_set, min_set, max_set, primitive);
fix_prefix ("quilisma", QUILISMA, current_set, min_set, max_set, primitive);
- fix_prefix ("deminutus", DEMINUTUM, current_set, min_set, max_set, primitive);
- fix_prefix ("semivocalis", SEMIVOCALIS, current_set, min_set, max_set, primitive);
+ fix_prefix ("deminutum", DEMINUTUM, current_set, min_set, max_set, primitive);
fix_prefix ("cavum", CAVUM, current_set, min_set, max_set, primitive);
fix_prefix ("linea", LINEA, current_set, min_set, max_set, primitive);
fix_prefix ("pes_or_flexa", LINEA, current_set, min_set, max_set, primitive);
(ORISCUS * to_boolean (primitive->get_grob_property ("oriscus"))) |
(QUILISMA * to_boolean (primitive->get_grob_property ("quilisma"))) |
(DEMINUTUM * to_boolean (primitive->get_grob_property ("deminutum"))) |
- (SEMIVOCALIS * to_boolean (primitive->get_grob_property ("semivocalis"))) |
(CAVUM * to_boolean (primitive->get_grob_property ("cavum"))) |
(LINEA * to_boolean (primitive->get_grob_property ("linea"))) |
(PES_OR_FLEXA * to_boolean (primitive->get_grob_property ("pes-or-flexa")));
/* check: ascendens and descendens exclude each other; same with
- auctum and diminutum */
+ auctum and deminutum */
if (prefix_set & DESCENDENS)
{
fix_prefix_set (&prefix_set,
primitive);
}
- /* check: semivocalis must occur in combination with and only with
- pes or flexa */
- if (prefix_set & SEMIVOCALIS)
- {
- fix_prefix_set (&prefix_set,
- SEMIVOCALIS | PES_OR_FLEXA,
- SEMIVOCALIS | PES_OR_FLEXA,
- primitive);
- }
- /* check: inclinatum may be prefixed with auctum or diminutum only */
+ /* check: inclinatum may be prefixed with auctum or deminutum only */
if (prefix_set & INCLINATUM)
{
fix_prefix_set (&prefix_set,
INCLINATUM | AUCTUM | DEMINUTUM,
primitive);
}
+ /* check: semivocalis (deminutum but not inclinatum) must occur in
+ combination with and only with pes or flexa */
+ else if (prefix_set & DEMINUTUM)
+ {
+ fix_prefix_set (&prefix_set,
+ DEMINUTUM | PES_OR_FLEXA,
+ DEMINUTUM | PES_OR_FLEXA,
+ primitive);
+ }
/* check: cavum and linea (either or both) may be applied only
upon core punctum */
int prefix_set = gh_scm2int (primitive->get_grob_property ("prefix-set"));
if (prefix_set & PES_OR_FLEXA)
- if (pitch > prev_pitch) // pes
+ if (!i) // ligature may not start with 2nd head of pes or flexa
+ {
+ primitive->warning ("may not apply `\\~' on first head of "
+ "ligature; ignoring `\\~'");
+ }
+ else if (pitch > prev_pitch) // pes
{
prev_context_info |= PES_LOWER;
context_info |= PES_UPPER;
primitive->warning ("may not apply `\\~' on heads with "
"identical pitch; ignoring `\\~'");
}
- if (prev_prefix_set & VIRGA)
+ if (prev_prefix_set & DEMINUTUM)
{
- context_info |= AFTER_VIRGA;
+ context_info |= AFTER_DEMINUTUM;
}
if (prev_primitive)
}
void
-Gregorian_ligature_engraver::typeset_ligature (Spanner *ligature,
- Array<Grob_info> primitives)
+Gregorian_ligature_engraver::transform_heads (Spanner *, Array<Grob_info>)
+{
+ programming_error ("Gregorian_ligature_engraver::transform_heads (): "
+ "this is an abstract method that should not be called, "
+ "but overridden by a subclass");
+}
+
+void
+Gregorian_ligature_engraver::build_ligature (Spanner *ligature,
+ Array<Grob_info> primitives)
{
// apply style-independent checking and transformation
check_and_fix_all_prefixes (primitives);
provide_context_info (primitives);
- // apply style-specific transformation (including line-up)
+ // apply style-specific transformation (including line-up); to be
+ // implemented by subclass
transform_heads (ligature, primitives);
-
- // typeset
- for (int i = 0; i < primitives.size (); i++)
- {
- typeset_grob (primitives[i].grob_);
- }
}
void
-Gregorian_ligature_engraver::start_translation_timestep ()
+Gregorian_ligature_engraver::stop_translation_timestep ()
{
- Ligature_engraver::start_translation_timestep ();
+ Ligature_engraver::stop_translation_timestep ();
pes_or_flexa_req_ = 0;
}
ENTER_DESCRIPTION (Gregorian_ligature_engraver,
/* descr */ "This is an abstract class. Subclasses such as Vaticana_ligature_engraver handle ligatures by glueing special ligature heads together.",
/* creats*/ "",
-/* accepts */ "ligature-event abort-event",
-/* acks */ "ligature-head-interface note-head-interface rest-interface",
+/* accepts */ "ligature-event",
+/* acks */ "note-head-interface rest-interface",
/* reads */ "",
/* write */ "");
projects / lilypond.git / blobdiff