2 molecule.cc -- implement Molecule
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include <libc-extension.hh> // isinf
12 #include "font-metric.hh"
13 #include "dimensions.hh"
14 #include "interval.hh"
16 #include "molecule.hh"
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)
55 if (abs (o[a]) > 30 CM
56 || isinf (o[a]) || isnan (o[a]))
58 programming_error ("Improbable offset for translation: setting to zero");
64 expr_ = scm_list_n (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_ = scm_list_n (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);
135 /* ly_? Thought we had the ly_ prefix for wrapping/adding to gh_ */
137 Molecule::ly_set_molecule_extent_x (SCM mol, SCM axis, SCM np)
139 Molecule* m = unsmob_molecule (mol);
140 SCM_ASSERT_TYPE (m, mol, SCM_ARG1, __FUNCTION__, "molecule");
141 SCM_ASSERT_TYPE (ly_axis_p(axis), axis, SCM_ARG2, __FUNCTION__, "axis");
142 SCM_ASSERT_TYPE (ly_number_pair_p (np), np, SCM_ARG3, __FUNCTION__, "number pair");
144 Interval iv = ly_scm2interval (np);
145 m->dim_[Axis (gh_scm2int (axis))] = iv;
147 return SCM_UNDEFINED;
151 Molecule::ly_get_molecule_extent (SCM mol, SCM axis)
153 Molecule *m = unsmob_molecule (mol);
154 SCM_ASSERT_TYPE (m, mol, SCM_ARG1, __FUNCTION__, "molecule");
155 SCM_ASSERT_TYPE (ly_axis_p(axis), axis, SCM_ARG2, __FUNCTION__, "axis");
157 return ly_interval2scm (m->extent (Axis (gh_scm2int (axis))));
162 Molecule::ly_molecule_combined_at_edge (SCM first, SCM axis, SCM direction,
163 SCM second, SCM padding)
166 Molecule * m1 = unsmob_molecule (first);
167 Molecule * m2 = unsmob_molecule (second);
171 SCM_ASSERT_TYPE(ly_axis_p(axis), axis, SCM_ARG2, __FUNCTION__, "axis");
172 SCM_ASSERT_TYPE(ly_dir_p (direction), direction, SCM_ARG3, __FUNCTION__, "dir");
173 SCM_ASSERT_TYPE(gh_number_p(padding), padding, SCM_ARG4, __FUNCTION__, "number");
178 result.add_at_edge (Axis (gh_scm2int (axis)), Direction (gh_scm2int (direction)),
179 *m2, gh_scm2double (padding));
181 return result.smobbed_copy ();
186 make_molecule (SCM expr, SCM xext, SCM yext)
191 Box b (ly_scm2interval (xext), ly_scm2interval(yext));
192 Molecule m (b, expr);
193 return m.smobbed_copy ();
197 fontify_atom (Font_metric * met, SCM f)
202 return scm_list_n (ly_symbol2scm ("fontify"),
203 ly_quote_scm (met->description_), f, SCM_UNDEFINED);
207 ly_fontify_atom (SCM met, SCM f)
209 SCM_ASSERT_TYPE(unsmob_metrics (met), met, SCM_ARG1, __FUNCTION__, "font metric");
211 return fontify_atom (unsmob_metrics (met), f);
215 ly_align_to_x (SCM mol, SCM axis, SCM dir)
217 SCM_ASSERT_TYPE(unsmob_molecule (mol), mol, SCM_ARG1, __FUNCTION__, "molecule");
218 SCM_ASSERT_TYPE(ly_axis_p(axis), axis, SCM_ARG2, __FUNCTION__, "axis");
219 SCM_ASSERT_TYPE(ly_dir_p (dir), dir, SCM_ARG3, __FUNCTION__, "dir");
221 unsmob_molecule (mol)->align_to ((Axis)gh_scm2int (axis), Direction (gh_scm2int (dir)));
223 return SCM_UNDEFINED;
230 scm_c_define_gsubr ("ly-make-molecule", 3, 0, 0, (Scheme_function_unknown) make_molecule);
231 scm_c_define_gsubr ("ly-fontify-atom", 2, 0, 0, (Scheme_function_unknown) ly_fontify_atom);
232 scm_c_define_gsubr ("ly-align-to!", 3, 0, 0, (Scheme_function_unknown) ly_align_to_x);
233 scm_c_define_gsubr ("ly-combine-molecule-at-edge", 5 , 0, 0, (Scheme_function_unknown) Molecule::ly_molecule_combined_at_edge);
234 scm_c_define_gsubr ("ly-set-molecule-extent!", 3 , 0, 0, (Scheme_function_unknown) Molecule::ly_set_molecule_extent_x);
235 scm_c_define_gsubr ("ly-get-molecule-extent", 2 , 0, 0, (Scheme_function_unknown) Molecule::ly_get_molecule_extent);
237 ADD_SCM_INIT_FUNC (molecule,molecule_init);
241 Molecule::empty_b () const
243 return expr_ == SCM_EOL;
247 Molecule::get_expr () const
255 Molecule::extent_box () const
259 IMPLEMENT_SIMPLE_SMOBS (Molecule);
263 Molecule::print_smob (SCM s, SCM port, scm_print_state *)
266 scm_puts ("#<Molecule ", port);
268 Molecule *r = (Molecule *) ly_cdr (s);
269 String str (r->str ());
270 scm_puts ((char *)str.ch_C (), port);
272 scm_puts (" >", port);
279 Molecule::mark_smob (SCM s)
281 Molecule *r = (Molecule *) ly_cdr (s);
286 IMPLEMENT_TYPE_P (Molecule, "molecule?");
287 IMPLEMENT_DEFAULT_EQUAL_P (Molecule);