2 molecule.cc -- implement Molecule
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include <libc-extension.hh>
12 #include "font-metric.hh"
13 #include "dimensions.hh"
14 #include "interval.hh"
16 #include "molecule.hh"
18 #include "killing-cons.tcc"
20 #include "ly-smobs.icc"
24 Molecule::smobbed_copy () const
26 Molecule * m = new Molecule(*this);
28 return m->smobbed_self ();
32 Molecule::extent(Axis a) const
37 Molecule::Molecule (Box b, SCM func)
50 Molecule::translate (Offset o)
56 || isinf (o[a]) || isnan (o[a]))
58 programming_error ("Improbable offset for translation: setting to zero");
64 expr_ = gh_list (ly_symbol2scm ("translate-molecule"),
66 expr_, SCM_UNDEFINED);
73 Molecule::translate_axis (Real x,Axis a)
83 Molecule::add_molecule (Molecule const &m)
85 expr_ = gh_list (ly_symbol2scm ("combine-molecule"),
87 expr_, SCM_UNDEFINED);
92 Molecule::set_empty (bool e)
96 dim_[X_AXIS].set_empty ();
97 dim_[Y_AXIS].set_empty ();
101 dim_[X_AXIS] = Interval(0,0);
102 dim_[Y_AXIS] = Interval (0,0);
108 Molecule::align_to (Axis a, Direction d)
110 Interval i (extent (a));
111 Real r = (d == CENTER) ? i.center () : i[d];
112 translate_axis (-r, a);
116 Molecule::add_at_edge (Axis a, Direction d, Molecule const &m, Real padding)
118 Real my_extent= empty_b () ? 0.0 : dim_[a][d];
119 Interval i (m.extent (a));
123 programming_error ("Molecule::add_at_edge: adding empty molecule.");
129 Real offset = my_extent - his_extent;
131 toadd.translate_axis (offset + d * padding, a);
132 add_molecule (toadd);
139 number_pair_p (SCM p)
141 return gh_pair_p (p) && gh_number_p (gh_car (p)) && gh_number_p (gh_cdr (p));
147 return gh_number_p (a) && (gh_scm2int (a) == 0 || gh_scm2int (a) == 1);
151 Molecule::ly_set_molecule_extent_x (SCM mol, SCM axis, SCM np)
153 Molecule* m = unsmob_molecule (mol);
154 if (m && axis_p (axis) && number_pair_p (np))
156 Interval iv = ly_scm2interval (np);
157 m->dim_[Axis(gh_scm2int (axis))] = ly_scm2interval (np);
160 warning ("ly-set-molecule-extent!: invalid arguments");
161 return SCM_UNDEFINED;
165 Molecule::ly_get_molecule_extent (SCM mol, SCM axis)
167 Molecule *m = unsmob_molecule (mol);
169 if (!m || !axis_p (axis))
171 warning ("ly-get-molecule-extent: invalid arguments");
172 return ly_interval2scm (Interval (0,0));
175 return ly_interval2scm (m->extent (Axis (gh_scm2int (axis))));
180 Molecule::ly_molecule_combined_at_edge (SCM first, SCM axis, SCM direction,
181 SCM second, SCM padding)
184 Molecule * m1 = unsmob_molecule (first);
185 Molecule * m2 = unsmob_molecule (second);
188 if (!m1 || !m2 || !isdir_b (direction) || !axis_p (axis) || !gh_number_p (padding))
190 warning ("ly-combine-molecule-at-edge: invalid arguments");
192 return r.smobbed_copy ();
197 result.add_at_edge (Axis (gh_scm2int (axis)), Direction (gh_scm2int (direction)),
198 *m2, gh_scm2double (padding));
200 return result.smobbed_copy ();
207 scm_make_gsubr ("ly-combine-molecule-at-edge", 5 , 0, 0, (Scheme_function_unknown) Molecule::ly_molecule_combined_at_edge);
208 scm_make_gsubr ("ly-set-molecule-extent!", 3 , 0, 0, (Scheme_function_unknown) Molecule::ly_set_molecule_extent_x);
209 scm_make_gsubr ("ly-get-molecule-extent", 2 , 0, 0, (Scheme_function_unknown) Molecule::ly_get_molecule_extent);
211 ADD_SCM_INIT_FUNC(molecule,molecule_init);
215 Molecule::empty_b () const
217 return expr_ == SCM_EOL;
221 fontify_atom(Font_metric * met, SCM f)
226 return gh_list (ly_symbol2scm ("fontify"),
227 ly_quote_scm (met->description_), f, SCM_UNDEFINED);
231 Molecule::get_expr () const
239 Molecule::extent_box () const
243 IMPLEMENT_SIMPLE_SMOBS(Molecule);
247 Molecule::print_smob (SCM s, SCM port, scm_print_state *)
249 Molecule *r = (Molecule *) gh_cdr (s);
251 scm_puts ("#<Molecule ", port);
252 /* String str(r->str());
253 scm_puts ((char *)str.ch_C(), port);*/
254 scm_puts (" >", port);
261 Molecule::mark_smob (SCM s)
263 Molecule *r = (Molecule *) gh_cdr (s);
268 IMPLEMENT_TYPE_P(Molecule, "molecule?");
269 IMPLEMENT_DEFAULT_EQUAL_P(Molecule);
270 IMPLEMENT_UNSMOB(Molecule, molecule);