-/*
- 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 <math.h>
+#include <map>
+
+#include "staff-symbol-referencer.hh"
+#include "warn.hh"
#include "tie-column.hh"
-#include "group-interface.hh"
+#include "paper-column.hh"
+#include "spanner.hh"
+#include "pointer-group-interface.hh"
#include "tie.hh"
#include "directional-element-interface.hh"
-#include "note-head.hh"
+#include "rhythmic-head.hh"
-Tie_column::Tie_column ()
+void
+Tie_column::add_tie (Grob *me, Grob *tie)
{
- set_elt_property ("ties", SCM_EOL);
- set_empty (X_AXIS);
- set_empty (Y_AXIS);
- set_elt_property ("transparent", SCM_BOOL_T);
+ if (tie->get_parent (Y_AXIS)
+ && Tie_column::has_interface (tie->get_parent (Y_AXIS)))
+ return;
+
+ 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 (Tie *s)
+Tie_column::set_directions (Grob *me)
{
- Group_interface g (this, "ties");
- if (!g.count ())
+ if (!to_boolean (me->get_property ("positioning-done")))
{
- set_bound (LEFT, s->head (LEFT));
- set_bound (RIGHT, s->head (RIGHT));
+ me->set_property ("positioning-done", SCM_BOOL_T);
+ new_directions (me);
}
-
- group (this, "ties").add_element (s);
- s->add_dependency (this);
}
-
int
-tie_compare (Tie* const & s1,
- Tie* const & s2)
+Tie::compare (Grob *const &s1,
+ Grob *const &s2)
{
- return sign (s1->position_f () - s2->position_f());
+ 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:
+ + The topmost tie is always `up'.
- In normal chord cases, the outer ties point outwards, and the
- direction of the rest is determined by their staff position.
+ + 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'.
- Ross forgets about the tie that is *on* the middle staff line. We
- assume it goes UP. (TODO: make this settable) */
+ + The bottommost tie is always `down'.
+*/
void
-Tie_column::set_directions ()
+Tie_column::werner_directions (Grob *me)
{
- Link_array<Tie> s =
- Group_interface__extract_elements (this, (Tie*)0, "ties");
-
+ extract_grob_set (me, "ties", ro_ties);
+ Link_array<Grob> ties (ro_ties);
+ if (!ties.size ())
+ return;
- Direction d = directional_element (this).get ();
+ ties.sort (&Tie::compare);
+ Direction d = get_grob_direction (me);
if (d)
{
- for (int i = s.size (); i--;)
- directional_element (s[i]).set (d);
+ for (int i = ties.size (); i--;)
+ {
+ Grob *t = ties[i];
+ if (!get_grob_direction (t))
+ set_grob_direction (t, d);
+ }
return;
}
-
- if (s.size () == 1)
+
+ if (ties.size () == 1)
{
- directional_element (s[0]).set (s[0]->get_default_dir ());
+ Grob *t = ties[0];
+ if (t->is_live ()
+ && !get_grob_direction (t))
+ set_grob_direction (t, Tie::get_default_dir (t));
return;
}
-
- s.sort (tie_compare);
- directional_element (s[0]).set (DOWN);
- s.del (0);
- directional_element (s.pop ()).set (UP);
- for (int i=s.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--;)
{
- Real p = s[i]->position_f ();
- 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;
+ {
+ 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;
- directional_element (s[i]).set (d);
+ set_grob_direction (t, d);
+ }
+
+ if (d == DOWN)
+ last_down_pos = p;
+
+ last_tie = t;
+ }
+
+ return;
+}
+
+MAKE_SCHEME_CALLBACK (Tie_column, after_line_breaking, 1);
+SCM
+Tie_column::after_line_breaking (SCM smob)
+{
+ set_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 * tie->get_bound (dir)->get_column ()->get_rank ()
+ > dir * me->get_bound (dir)->get_column ()->get_rank ())
+ 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 "
+ "positioning-done "
+ );
+
+
+
+
+bool
+config_allowed (map<Tie_configuration, bool> const &allowed,
+ Tie_configuration conf)
+{
+ return allowed.find (conf) == allowed.end ();
+}
+
+void
+add_configuration (map<Tie_configuration, bool> *allowed,
+ Grob *tie_column,
+ Tie_configuration new_conf)
+{
+ bool on_line = Staff_symbol_referencer::on_staffline (tie_column, new_conf.position_);
+ if (allowed->find (new_conf) != allowed->end ()
+ && !(*allowed)[new_conf])
+ {
+ programming_error ("Tie configuration not allowed");
+ }
+
+
+ if (on_line)
+ {
+ Tie_configuration forbidden;
+
+ forbidden.dir_ = -new_conf.dir_ ;
+ forbidden.position_ = new_conf.position_;
+ (*allowed)[forbidden] = false;
+
+ forbidden.position_ += new_conf.dir_;
+ (*allowed)[forbidden] = false;
+ forbidden.position_ += new_conf.dir_;
+ (*allowed)[forbidden] = false;
+
+ forbidden.dir_ = new_conf.dir_;
+ forbidden.position_ = new_conf.position_ + new_conf.dir_;
+ (*allowed)[forbidden] = false;
+ }
+ else
+ {
+ Tie_configuration forbidden;
+ forbidden.dir_ = - new_conf.dir_;
+ forbidden.position_ = new_conf.position_;
+
+
+ (*allowed)[forbidden] = false;
+ forbidden.position_ -= new_conf.dir_;
+ forbidden.dir_ = new_conf.dir_;
+ (*allowed)[forbidden] = false;
+
+ forbidden.position_ += 2* new_conf.dir_;
+ (*allowed)[forbidden] = false;
+ }
}
+
void
-Tie_column::do_post_processing ()
+Tie_column::new_directions (Grob *me)
{
- set_directions ();
+ extract_grob_set (me, "ties", ro_ties);
+ Link_array<Grob> ties (ro_ties);
+ if (!ties.size ())
+ return;
+
+ if (ties.size() == 1)
+ {
+ Tie::set_default_control_points (ties[0]);
+ return ;
+ }
+
+ ties.sort (&Tie::compare);
+ Array<Tie_configuration> tie_configs;
+ for (int i = 0; i < ties.size (); i++)
+ {
+ Tie_configuration conf;
+ conf.dir_ = get_grob_direction (ties[i]);
+ conf.position_ = (int) rint (Tie::get_position (ties[i]));
+ tie_configs.push (conf);
+ }
+
+
+ if (!tie_configs[0].dir_)
+ tie_configs[0].dir_ = DOWN;
+ if (!tie_configs.top().dir_)
+ tie_configs.top().dir_ = UP;
+
+
+ /*
+ Seconds
+ */
+ for (int i = 1; i < tie_configs.size(); i++)
+ {
+ if (fabs (tie_configs[i-1].position_ - tie_configs[i].position_) <= 1)
+ {
+ if (!tie_configs[i-1].dir_)
+ tie_configs[i-1].dir_ = DOWN;
+ if (!tie_configs[i].dir_)
+ tie_configs[i].dir_ = UP;
+ }
+ }
+
+ for (int i = 1; i < tie_configs.size() - 1; i++)
+ {
+ if (tie_configs[i].dir_)
+ continue;
+
+ tie_configs[i].dir_ = (Direction) sign (tie_configs[i].position_);
+ }
+
+ Grob *common[NO_AXES] = {
+ me, me
+ };
+ for (int i = 0; i < ties.size (); i++)
+ for (int a = X_AXIS; a < NO_AXES; a++)
+ {
+ Axis ax ((Axis) a);
+
+ common[ax] = dynamic_cast<Spanner*> (ties[i])->get_bound (LEFT)->common_refpoint (common[a], ax);
+ common[ax] = dynamic_cast<Spanner*> (ties[i])->get_bound (RIGHT)->common_refpoint (common[a], ax);
+ }
+
+ map<Tie_configuration, bool> allowed;
+
+ Tie::get_configuration (ties[0], common, &tie_configs.elem_ref (0));
+ Tie::get_configuration (ties.top (), common,
+ &tie_configs.elem_ref (tie_configs.size()-1));
+
+ add_configuration (&allowed, me, tie_configs[0]);
+ add_configuration (&allowed, me, tie_configs.top());
+
+ for (int i = 1; i < ties.size(); i++)
+ {
+ Tie_configuration conf = tie_configs[i];
+ Tie::get_configuration (ties[i], common, &conf);
+ if (!config_allowed (allowed, conf))
+ {
+ conf = tie_configs[i];
+
+ Direction d = LEFT;
+ do
+ {
+ conf.attachment_x_[d] = d * 1e6; // infty
+ for (int j = i - 1; j < i + 2; j++)
+ {
+ if (j >= 0 && j < ties.size())
+ {
+ Spanner *t = dynamic_cast<Spanner*> (ties[j]);
+ Interval ext
+ = robust_relative_extent (t->get_bound (d),
+ common[X_AXIS], X_AXIS);
+ conf.attachment_x_[d]
+ = d * min (d * conf.attachment_x_[d], d * ext[-d]);
+ }
+ }
+ }
+ while (flip (&d) != LEFT);
+ tie_configs[i] = conf;
+ }
+ else
+ tie_configs[i] = conf;
+
+ add_configuration (&allowed, me, conf);
+ }
+
+ for (int i = 0; i < ties.size(); i++)
+ {
+ Tie::set_control_points (ties[i], common, tie_configs[i]);
+ set_grob_direction (ties[i], tie_configs[i].dir_);
+ }
}
+
+
projects / lilypond.git / blobdiff