-/*
- tie-column.cc -- implement Tie_column
-
+/*
+ tie-column.cc -- implement Tie_column
+
source file of the GNU LilyPond music typesetter
-
- (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+
+ (c) 2000--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
#include "tie-column.hh"
+#include "paper-column.hh"
+#include "spanner.hh"
#include "group-interface.hh"
#include "tie.hh"
#include "directional-element-interface.hh"
#include "rhythmic-head.hh"
-
-
+/*
+ tie dir depends on what Tie_column does.
+*/
+/*
+ TODO: this doesn't follow standard pattern. Regularize.
+*/
void
-Tie_column::set_interface (Score_element*me)
+Tie_column::add_tie (Grob *me, Grob *tie)
{
- me-> set_elt_property ("ties", SCM_EOL);
- me->set_interface (ly_symbol2scm ("tie-column"));
- me->set_extent_callback (0, X_AXIS);
- me->set_extent_callback (0, Y_AXIS);
-}
+ if (tie->get_parent (Y_AXIS)
+ && Tie_column::has_interface (tie->get_parent (Y_AXIS)))
+ return;
-bool
-Tie_column::has_interface (Score_element*me)
-{
- return me->has_interface (ly_symbol2scm ("tie-column"));
+ if (!Pointer_group_interface::count (me, ly_symbol2scm ("ties")))
+ {
+ dynamic_cast<Spanner *> (me)->set_bound (LEFT, Tie::head (tie, LEFT));
+ dynamic_cast<Spanner *> (me)->set_bound (RIGHT, Tie::head (tie, RIGHT));
+ }
+
+ tie->set_parent (me, Y_AXIS);
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("ties"), tie);
+ tie->add_dependency (me);
}
void
-Tie_column::add_tie (Score_element*me,Tie *s)
+Tie_column::set_directions (Grob *me)
{
- Pointer_group_interface g (me, "ties");
- if (!g.count ())
- {
- dynamic_cast<Spanner*> (me)->set_bound (LEFT, Tie::head (s,LEFT));
- dynamic_cast<Spanner*> (me)->set_bound (RIGHT, Tie::head (s,RIGHT));
- }
-
- Pointer_group_interface (me, "ties").add_element (s);
- s->add_dependency (me);
+ werner_directions (me);
}
-
int
-tie_compare (Tie* const & s1,
- Tie* const & s2)
+tie_compare (Grob *const &s1,
+ Grob *const &s2)
{
- return sign (Tie::position_f (s1) - Tie::position_f(s2));
+ return sign (Tie::get_position (s1) - Tie::get_position (s2));
}
/*
- See [Ross p. 138].
+ Werner:
+ . The algorithm to choose the direction of the ties doesn't work
+ properly. I suggest the following for applying ties sequentially
+ from top to bottom:
- In normal chord cases, the outer ties point outwards, and the
- direction of the rest is determined by their staff position.
+ + The topmost tie is always `up'.
- Ross forgets about the tie that is *on* the middle staff line. We
- assume it goes UP. (TODO: make me settable) */
+ + If there is a vertical gap to the last note above larger than
+ or equal to a fifth (or sixth?), the tie is `up', otherwise it
+ is `down'.
+
+ + The bottommost tie is always `down'.
+*/
void
-Tie_column::set_directions (Score_element*me)
+Tie_column::werner_directions (Grob *me)
{
- Link_array<Tie> ties =
- Pointer_group_interface__extract_elements (me, (Tie*)0, "ties");
+ Link_array<Grob> ties
+ = extract_grob_array (me, ly_symbol2scm ("ties"));
+ if (!ties.size ())
+ return;
- Direction d = Directional_element_interface (me).get ();
+ ties.sort (tie_compare);
+ Direction d = get_grob_direction (me);
if (d)
{
for (int i = ties.size (); i--;)
{
- Tie * t = ties[i];
- Directional_element_interface (t).set (d);
+ Grob *t = ties[i];
+ if (!get_grob_direction (t))
+ set_grob_direction (t, d);
}
return;
}
-
+
if (ties.size () == 1)
{
- Tie * t = ties[0];
- Directional_element_interface (t).set (Tie::get_default_dir (t));
+ Grob *t = ties[0];
+ if (t->is_live ()
+ && !get_grob_direction (t))
+ set_grob_direction (t, Tie::get_default_dir (t));
return;
}
-
- ties.sort (tie_compare);
- Directional_element_interface tie0(ties[0]);
- tie0.set (DOWN);
- ties.del (0);
-
- Directional_element_interface tietop(ties.pop ());
- tietop.set (UP);
-
- for (int i=ties.size(); i--; )
+
+ Real last_down_pos = 10000;
+ if (!get_grob_direction (ties[0]))
+ set_grob_direction (ties[0], DOWN);
+
+ /*
+ Go downward.
+ */
+ Grob *last_tie = 0;
+ for (int i = ties.size (); i--;)
{
- Tie * t = ties[i];
- Real p = Tie::position_f (t);
- Direction d = (Direction) sign (p);
+ Grob *t = ties[i];
+
+ Direction d = get_grob_direction (t);
+ Real p = Tie::get_position (t);
if (!d)
- d = UP;
- Directional_element_interface (t).set (d);
+ {
+ if (last_tie
+ && Tie::get_column_rank (t, LEFT)
+ < Tie::get_column_rank (last_tie, LEFT))
+ {
+ d = DOWN;
+ }
+ else if (last_down_pos - p > 5)
+ {
+ d = UP;
+ }
+ else
+ {
+ d = DOWN;
+ }
+
+ set_grob_direction (t, d);
+ }
+
+ if (d == DOWN)
+ last_down_pos = p;
+
+ last_tie = t;
}
-
+
+ return;
}
-MAKE_SCHEME_CALLBACK(Tie_column,after_line_breaking);
+MAKE_SCHEME_CALLBACK (Tie_column, after_line_breaking, 1);
SCM
Tie_column::after_line_breaking (SCM smob)
{
- set_directions (unsmob_element (smob));
- return SCM_UNDEFINED;
+ werner_directions (unsmob_grob (smob));
+ return SCM_UNSPECIFIED;
}
+
+/*
+ Extend the spanner over its Tie constituents.
+*/
+MAKE_SCHEME_CALLBACK (Tie_column, before_line_breaking, 1);
+SCM
+Tie_column::before_line_breaking (SCM smob)
+{
+ Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
+ for (SCM s = me->get_property ("ties"); scm_is_pair (s); s = scm_cdr (s))
+ {
+ Spanner *tie = dynamic_cast<Spanner *> (unsmob_grob (scm_car (s)));
+ Direction dir = LEFT;
+ do
+ {
+ if (dir * Paper_column::get_rank (tie->get_bound (dir)->get_column ())
+ > dir * Paper_column::get_rank (me->get_bound (dir)->get_column ()))
+ {
+ me->set_bound (dir, Tie::head (tie, dir));
+ }
+ }
+ while (flip (&dir) != LEFT);
+ }
+ return SCM_UNSPECIFIED;
+}
+
+ADD_INTERFACE (Tie_column, "tie-column-interface",
+ "Object that sets directions of multiple ties in a tied chord",
+ "direction");
+
projects / lilypond.git / blobdiff