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 ()
{
- porrectus_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");
+ pes_or_flexa_req_ = 0;
}
bool
Gregorian_ligature_engraver::try_music (Music *m)
{
- if (m->is_mus_type ("porrectus-event"))
+ if (m->is_mus_type ("pes-or-flexa-event"))
{
- porrectus_req_ = m;
+ pes_or_flexa_req_ = m;
return true;
}
else
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)
void check_and_fix_all_prefixes (Array<Grob_info> primitives)
{
/* Check for illegal head modifier combinations */
- for (int i = 0; i < primitives.size(); i++) {
+ for (int i = 0; i < primitives.size(); i++)
+ {
Grob *primitive = primitives[i].grob_;
/* compute head prefix set by inspecting primitive grob properties */
provide_context_info (Array<Grob_info> primitives)
{
Grob *prev_primitive = 0;
+ int prev_prefix_set = 0;
int prev_context_info = 0;
int prev_pitch = 0;
for (int i = 0; i < primitives.size(); i++) {
primitive->warning ("may not apply `\\~' on heads with "
"identical pitch; ignoring `\\~'");
}
+ if (prev_prefix_set & VIRGA)
+ {
+ context_info |= AFTER_VIRGA;
+ }
+
if (prev_primitive)
prev_primitive->set_grob_property ("context-info",
gh_int2scm (prev_context_info));
prev_primitive = primitive;
+ prev_prefix_set = prefix_set;
prev_context_info = context_info;
prev_pitch = pitch;
}
}
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 ()
{
Ligature_engraver::start_translation_timestep ();
- porrectus_req_ = 0;
+ pes_or_flexa_req_ = 0;
}
ENTER_DESCRIPTION (Gregorian_ligature_engraver,
/* acks */ "ligature-head-interface note-head-interface rest-interface",
/* reads */ "",
/* write */ "");
-
-class Gregorian_ligature {
-public:
- static bool has_interface (Grob *);
-};
-ADD_INTERFACE (Gregorian_ligature, "gregorian-ligature-interface",
- "A gregorian ligature",
- "virga stropha inclinatum auctum descendens ascendens "
- "pes-or-flexa semivocalis oriscus quilisma deminutum");
projects / lilypond.git / blobdiff