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>
*/
-/*
- ugh. Rewrite not finished yet. Still must copy atom lists.
- */
-
-
#include <math.h>
+#include <libc-extension.hh>
-#include "font-metric.hh"
+#include "font-metric.hh"
#include "dimensions.hh"
#include "interval.hh"
#include "string.hh"
#include "molecule.hh"
-
#include "debug.hh"
#include "killing-cons.tcc"
+#include "ly-smobs.icc"
-Box
-Molecule::extent() const
+
+SCM
+Molecule::smobbed_copy () const
{
- return dim_;
+ Molecule * m = new Molecule (*this);
+
+ return m->smobbed_self ();
}
Interval
-Molecule::extent(Axis a) const
+Molecule::extent (Axis a) const
{
return dim_[a];
}
Molecule::Molecule (Box b, SCM func)
{
expr_ = func;
- dim_ = b ;
+ dim_ = b;
}
-Molecule::Molecule()
+Molecule::Molecule ()
{
expr_ = SCM_EOL;
set_empty (true);
Axis a = X_AXIS;
while (a < NO_AXES)
{
- if (abs(o[a]) > 30 CM
+ if (abs (o[a]) > 30 CM
|| isinf (o[a]) || isnan (o[a]))
{
programming_error ("Improbable offset for translation: setting to zero");
void
Molecule::translate_axis (Real x,Axis a)
{
- Offset o(0,0);
+ Offset o (0,0);
o[a] = x;
translate (o);
}
}
else
{
- dim_[X_AXIS] = Interval(0,0);
+ dim_[X_AXIS] = Interval (0,0);
dim_[Y_AXIS] = Interval (0,0);
}
}
Molecule::align_to (Axis a, Direction d)
{
Interval i (extent (a));
- Real r = (d == CENTER) ? i.center () : i[d];
+ Real r = (d == CENTER) ? i.center () : i[d];
translate_axis (-r, a);
}
-
void
Molecule::add_at_edge (Axis a, Direction d, Molecule const &m, Real padding)
{
Real my_extent= empty_b () ? 0.0 : dim_[a][d];
- Interval i (m.extent ()[a]);
+ 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 ();
+}
+
+
+SCM
+make_molecule (SCM expr, SCM xext, SCM yext)
+{
+ /*
+ TODO: typechecking.
+ */
+ Box b (ly_scm2interval (xext), ly_scm2interval(yext));
+ Molecule m (b, expr);
+ return m.smobbed_copy ();
+}
+
+
+static void
+molecule_init ()
+{
+ scm_make_gsubr ("ly-make-molecule", 3, 0, 0, (Scheme_function_unknown) make_molecule);
+ 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_ == SCM_EOL;
}
+SCM
+fontify_atom (Font_metric * met, SCM f)
+{
+ if (f == SCM_EOL)
+ return f;
+ else
+ return gh_list (ly_symbol2scm ("fontify"),
+ ly_quote_scm (met->description_), f, SCM_UNDEFINED);
+}
+
+SCM
+Molecule::get_expr () const
+{
+ return expr_;
+}
+
+
+Box
+Molecule::extent_box () const
+{
+ return dim_;
+}
+IMPLEMENT_SIMPLE_SMOBS (Molecule);
+
+
+int
+Molecule::print_smob (SCM s, SCM port, scm_print_state *)
+{
+ 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;
+}
+
+
SCM
-fontify_atom(Font_metric * met, SCM f)
+Molecule::mark_smob (SCM s)
{
- return gh_list (ly_symbol2scm ("fontify"),
- ly_quote_scm (met->description ()), f, SCM_UNDEFINED);
+ Molecule *r = (Molecule *) gh_cdr (s);
+
+ return r->expr_;
}
+
+IMPLEMENT_TYPE_P (Molecule, "molecule?");
+IMPLEMENT_DEFAULT_EQUAL_P (Molecule);
+IMPLEMENT_UNSMOB (Molecule, molecule);
projects / lilypond.git / blobdiff