source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include <math.h>
-#include <libc-extension.hh>
+#include <libc-extension.hh> // isinf
-#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 "warn.hh"
+
+
+#include "ly-smobs.icc"
+
+
+SCM
+Molecule::smobbed_copy () const
+{
+ Molecule * m = new Molecule (*this);
+
+ return m->smobbed_self ();
+}
Interval
-Molecule::extent(Axis a) const
+Molecule::extent (Axis a) const
{
return dim_[a];
}
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]) > 100 CM
|| isinf (o[a]) || isnan (o[a]))
{
programming_error ("Improbable offset for translation: setting to zero");
incr (a);
}
- expr_ = gh_list (ly_symbol2scm ("translate-molecule"),
+ expr_ = scm_list_n (ly_symbol2scm ("translate-molecule"),
ly_offset2scm (o),
expr_, SCM_UNDEFINED);
- if (!empty_b ())
+ if (!is_empty ())
dim_.translate (o);
}
void
Molecule::translate_axis (Real x,Axis a)
{
- Offset o(0,0);
+ Offset o (0,0);
o[a] = x;
translate (o);
}
void
Molecule::add_molecule (Molecule const &m)
{
- expr_ = gh_list (ly_symbol2scm ("combine-molecule"),
+ expr_ = scm_list_n (ly_symbol2scm ("combine-molecule"),
m.expr_,
expr_, SCM_UNDEFINED);
dim_.unite (m.dim_);
}
else
{
- dim_[X_AXIS] = Interval(0,0);
+ dim_[X_AXIS] = Interval (0,0);
dim_[Y_AXIS] = Interval (0,0);
}
}
void
-Molecule::align_to (Axis a, Direction d)
+Molecule::align_to (Axis a, Real x)
{
+ if (is_empty ())
+ return ;
+
Interval i (extent (a));
- Real r = (d == CENTER) ? i.center () : i[d];
- translate_axis (-r, a);
+ translate_axis (-i.linear_combination (x), a);
}
+/*
+ See scheme Function.
+ */
void
-Molecule::add_at_edge (Axis a, Direction d, Molecule const &m, Real padding)
+Molecule::add_at_edge (Axis a, Direction d, Molecule const &m, Real padding,
+ Real minimum)
{
- Real my_extent= empty_b () ? 0.0 : dim_[a][d];
+ Real my_extent= is_empty () ? 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;
+ if (i.is_empty ())
+ {
+ programming_error ("Molecule::add_at_edge: adding empty molecule.");
+ his_extent = 0.0;
+ }
+ else
+ his_extent = i[-d];
+
+ Real offset = (my_extent - his_extent) + d*padding;
+ if (minimum > 0 && fabs (offset) < minimum)
+ offset = sign (offset) * minimum;
- Real his_extent = i[-d];
- Real offset = my_extent - his_extent;
Molecule toadd (m);
- toadd.translate_axis (offset + d * padding, a);
+ toadd.translate_axis (offset, a);
add_molecule (toadd);
}
+
+
+/*
+ Hmm... maybe this is not such a good idea ; stuff can be empty,
+ while expr_ == '()
+ */
bool
-Molecule::empty_b () const
+Molecule::is_empty () const
{
return expr_ == SCM_EOL;
}
-SCM
-fontify_atom(Font_metric * met, SCM f)
-{
- return gh_list (ly_symbol2scm ("fontify"),
- ly_quote_scm (met->description ()), f, SCM_UNDEFINED);
-}
-
SCM
Molecule::get_expr () const
{
return expr_;
}
-Molecule
-create_molecule (SCM scm_mol)
+
+
+Box
+Molecule::extent_box () const
{
- if (!gh_pair_p (scm_mol))
- return Molecule ();
+ return dim_;
+}
+IMPLEMENT_SIMPLE_SMOBS (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);
+
+int
+Molecule::print_smob (SCM , SCM port, scm_print_state *)
+{
+ scm_puts ("#<Molecule ", port);
+ scm_puts (" >", port);
+
+ return 1;
}
+
SCM
-Molecule::create_scheme () const
+Molecule::mark_smob (SCM s)
{
- return gh_cons (expr_,
- gh_cons (ly_interval2scm (dim_[X_AXIS]),
- ly_interval2scm (dim_[Y_AXIS])));
+ Molecule *r = (Molecule *) ly_cdr (s);
+
+ return r->expr_;
}
+
+IMPLEMENT_TYPE_P (Molecule, "ly:molecule?");
+IMPLEMENT_DEFAULT_EQUAL_P (Molecule);
+