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 <libc-extension.hh>
+#include "font-metric.hh"
+#include "dimensions.hh"
#include "interval.hh"
#include "string.hh"
#include "molecule.hh"
-#include "atom.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];
}
-void
-Molecule::translate (Offset o)
+Molecule::Molecule (Box b, SCM func)
{
- if (isinf (o.length ()))
- {
- programming_error ("Translating infinitely. Ignore.");
- return;
- }
-
- for (SCM ptr = gh_cdr (atom_list_); ptr != SCM_EOL; ptr = gh_cdr(ptr))
- {
- unsmob_atom (gh_car (ptr))->off_ += o;
- }
- if (!empty_b ())
- dim_.translate (o);
+ expr_ = func;
+ dim_ = b;
}
-void
-Molecule::translate_axis (Real x,Axis a)
+Molecule::Molecule ()
{
- if (isinf (x))
- {
- programming_error ("Translating infinitely. Ignore.");
- return;
- }
- for (SCM ptr = gh_cdr (atom_list_); ptr != SCM_EOL; ptr = gh_cdr(ptr))
- {
- unsmob_atom (gh_car (ptr))->off_[a] += x;
- }
-
- if (!dim_[a].empty_b ())
- dim_[a] += x;
+ expr_ = SCM_EOL;
+ set_empty (true);
}
void
-Molecule::add_molecule (Molecule const &m)
+Molecule::translate (Offset o)
{
- for (SCM ptr = gh_cdr (m.atom_list_); ptr != SCM_EOL; ptr = gh_cdr(ptr))
+ Axis a = X_AXIS;
+ while (a < NO_AXES)
{
- Atom *a = new Atom (*unsmob_atom (gh_car (ptr)));
- add_atom (a->self_scm_);
+ if (abs (o[a]) > 30 CM
+ || isinf (o[a]) || isnan (o[a]))
+ {
+ programming_error ("Improbable offset for translation: setting to zero");
+ o[a] = 0.0;
+ }
+ incr (a);
}
- dim_.unite (m.dim_);
+
+ expr_ = gh_list (ly_symbol2scm ("translate-molecule"),
+ ly_offset2scm (o),
+ expr_, SCM_UNDEFINED);
+ if (!empty_b ())
+ dim_.translate (o);
}
+
void
-Molecule::add_atom (SCM atomsmob)
+Molecule::translate_axis (Real x,Axis a)
{
- gh_set_cdr_x (atom_list_,
- gh_cons (atomsmob, gh_cdr (atom_list_)));
+ Offset o (0,0);
+ o[a] = x;
+ translate (o);
+}
+
- scm_unprotect_object (atomsmob);
-}
void
-Molecule::operator=(Molecule const & src)
+Molecule::add_molecule (Molecule const &m)
{
- if (&src == this)
- return;
-
- atom_list_ = gh_cons (SCM_EOL,SCM_EOL);
- dim_= src.dim_;
- add_molecule (src);
+ expr_ = gh_list (ly_symbol2scm ("combine-molecule"),
+ m.expr_,
+ expr_, SCM_UNDEFINED);
+ dim_.unite (m.dim_);
}
void
}
else
{
- dim_[X_AXIS] = Interval(0,0);
+ dim_[X_AXIS] = Interval (0,0);
dim_[Y_AXIS] = Interval (0,0);
}
}
+
void
-Molecule::print () const
+Molecule::align_to (Axis a, Direction d)
{
-#ifndef NPRINT
- for (SCM ptr = gh_cdr (atom_list_); ptr != SCM_EOL; ptr = gh_cdr(ptr))
- gh_display (gh_car (ptr));
-#endif
+ Interval i (extent (a));
+ Real r = (d == CENTER) ? i.center () : i[d];
+ translate_axis (-r, a);
}
-Molecule::Molecule (Molecule const &s)
+void
+Molecule::add_at_edge (Axis a, Direction d, Molecule const &m, Real padding)
{
- atom_list_ = gh_cons (SCM_EOL, SCM_EOL);
- set_empty (true);
- add_molecule (s);
+ 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.");
+ 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);
}
-Molecule::~Molecule ()
+
+
+
+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);
+}
-void
-Molecule::align_to (Axis a, Direction d)
+SCM
+Molecule::ly_set_molecule_extent_x (SCM mol, SCM axis, SCM np)
{
- if (d == CENTER)
+ Molecule* m = unsmob_molecule (mol);
+ if (m && axis_p (axis) && number_pair_p (np))
{
- Interval i (extent (a));
- translate_axis (-i.center (), a);
+ 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))
{
- translate_axis (-extent (a)[d], a);
+ warning ("ly-get-molecule-extent: invalid arguments");
+ return ly_interval2scm (Interval (0,0));
}
+
+ return ly_interval2scm (m->extent (Axis (gh_scm2int (axis))));
}
-Molecule::Molecule ()
+
+SCM
+Molecule::ly_molecule_combined_at_edge (SCM first, SCM axis, SCM direction,
+ SCM second, SCM padding)
+
{
- dim_[X_AXIS].set_empty ();
- dim_[Y_AXIS].set_empty ();
- atom_list_ = gh_cons (SCM_EOL, SCM_EOL);
+ 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 ();
}
-void
-Molecule::add_at_edge (Axis a, Direction d, Molecule const &m, Real padding)
+SCM
+make_molecule (SCM expr, SCM xext, SCM yext)
{
- Real my_extent= empty_b () ? 0.0 : dim_[a][d];
- Interval i (m.extent ()[a]);
- if (i.empty_b ())
- programming_error ("Molecule::add_at_edge: adding empty molecule.");
-
- Real his_extent = i[-d];
- Real offset = my_extent - his_extent;
- Molecule toadd (m);
- toadd.translate_axis (offset + d * padding, a);
- add_molecule (toadd);
+ /*
+ 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 gh_cdr (atom_list_) == SCM_EOL;
+ 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
+Molecule::mark_smob (SCM s)
+{
+ 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