source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include <math.h>
#include "debug.hh"
#include "killing-cons.tcc"
+#include "ly-smobs.icc"
+
+
+SCM
+Molecule::smobbed_copy () const
+{
+ Molecule * m = new Molecule(*this);
+
+ return m->smobbed_self ();
+}
+
Interval
Molecule::extent(Axis a) const
{
{
Real my_extent= empty_b () ? 0.0 : dim_[a][d];
Interval i (m.extent (a));
+ Real his_extent;
if (i.empty_b ())
- programming_error ("Molecule::add_at_edge: adding empty molecule.");
-
- Real his_extent = i[-d];
+ {
+ programming_error ("Molecule::add_at_edge: adding empty molecule.");
+ his_extent = 0.0;
+ }
+ else
+ his_extent = i[-d];
+
Real offset = my_extent - his_extent;
Molecule toadd (m);
toadd.translate_axis (offset + d * padding, a);
add_molecule (toadd);
}
+
+
+
+bool
+number_pair_p (SCM p)
+{
+ return gh_pair_p (p) && gh_number_p (gh_car (p)) && gh_number_p (gh_cdr (p));
+}
+
+bool
+axis_p (SCM a)
+{
+ return gh_number_p (a) && (gh_scm2int (a) == 0 || gh_scm2int (a) == 1);
+}
+
+SCM
+Molecule::ly_set_molecule_extent_x (SCM mol, SCM axis, SCM np)
+{
+ Molecule* m = unsmob_molecule (mol);
+ if (m && axis_p (axis) && number_pair_p (np))
+ {
+ Interval iv = ly_scm2interval (np);
+ m->dim_[Axis(gh_scm2int (axis))] = ly_scm2interval (np);
+ }
+ else
+ warning ("ly-set-molecule-extent!: invalid arguments");
+ return SCM_UNDEFINED;
+}
+
+SCM
+Molecule::ly_get_molecule_extent (SCM mol, SCM axis)
+{
+ Molecule *m = unsmob_molecule (mol);
+
+ if (!m || !axis_p (axis))
+ {
+ warning ("ly-get-molecule-extent: invalid arguments");
+ return ly_interval2scm (Interval (0,0));
+ }
+
+ return ly_interval2scm (m->extent (Axis (gh_scm2int (axis))));
+}
+
+
+SCM
+Molecule::ly_molecule_combined_at_edge (SCM first, SCM axis, SCM direction,
+ SCM second, SCM padding)
+
+{
+ Molecule * m1 = unsmob_molecule (first);
+ Molecule * m2 = unsmob_molecule (second);
+ Molecule result;
+
+ if (!m1 || !m2 || !isdir_b (direction) || !axis_p (axis) || !gh_number_p (padding))
+ {
+ warning ("ly-combine-molecule-at-edge: invalid arguments");
+ Molecule r;
+ return r.smobbed_copy ();
+ }
+
+ result = *m1;
+
+ result.add_at_edge (Axis (gh_scm2int (axis)), Direction (gh_scm2int (direction)),
+ *m2, gh_scm2double (padding));
+
+ return result.smobbed_copy ();
+}
+
+
+static void
+molecule_init ()
+{
+ scm_make_gsubr ("ly-combine-molecule-at-edge", 5 , 0, 0, (Scheme_function_unknown) Molecule::ly_molecule_combined_at_edge);
+ scm_make_gsubr ("ly-set-molecule-extent!", 3 , 0, 0, (Scheme_function_unknown) Molecule::ly_set_molecule_extent_x);
+ scm_make_gsubr ("ly-get-molecule-extent", 2 , 0, 0, (Scheme_function_unknown) Molecule::ly_get_molecule_extent);
+}
+ADD_SCM_INIT_FUNC(molecule,molecule_init);
+
+
bool
Molecule::empty_b () const
{
return expr_;
}
-Molecule
-create_molecule (SCM scm_mol)
-{
- if (!gh_pair_p (scm_mol))
- return Molecule ();
- SCM exp = gh_car (scm_mol);
- scm_mol = gh_cdr (scm_mol);
- Box b ;
- if (gh_pair_p (scm_mol))
- {
- Interval i1 = ly_scm2interval (gh_car (scm_mol));
- Interval i2 = ly_scm2interval (gh_cdr (scm_mol));
- b = Box (i1,i2);
- }
- return Molecule (b, exp);
+
+Box
+Molecule::extent_box () const
+{
+ return dim_;
}
+IMPLEMENT_SIMPLE_SMOBS(Molecule);
-SCM
-Molecule::create_scheme () const
+
+int
+Molecule::print_smob (SCM s, SCM port, scm_print_state *)
{
- return gh_cons (expr_,
- gh_cons (ly_interval2scm (dim_[X_AXIS]),
- ly_interval2scm (dim_[Y_AXIS])));
+ Molecule *r = (Molecule *) gh_cdr (s);
+
+ scm_puts ("#<Molecule ", port);
+ /* String str(r->str());
+ scm_puts ((char *)str.ch_C(), port);*/
+ scm_puts (" >", port);
+
+ return 1;
}
-Box
-Molecule::extent_box () const
+
+SCM
+Molecule::mark_smob (SCM s)
{
- return dim_;
+ Molecule *r = (Molecule *) gh_cdr (s);
+
+ return r->expr_;
}
+
+IMPLEMENT_TYPE_P(Molecule, "molecule?");
+IMPLEMENT_DEFAULT_EQUAL_P(Molecule);
+IMPLEMENT_UNSMOB(Molecule, molecule);