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 if (m && ly_axis_p (axis) && ly_number_pair_p (np))
142 Interval iv = ly_scm2interval (np);
143 m->dim_[Axis (gh_scm2int (axis))] = iv;
146 warning ("ly-set-molecule-extent!: invalid arguments");
147 return SCM_UNDEFINED;
151 Molecule::ly_get_molecule_extent (SCM mol, SCM axis)
153 Molecule *m = unsmob_molecule (mol);
155 if (!m || !ly_axis_p (axis))
157 warning ("ly-get-molecule-extent: invalid arguments");
158 return ly_interval2scm (Interval (0,0));
161 return ly_interval2scm (m->extent (Axis (gh_scm2int (axis))));
166 Molecule::ly_molecule_combined_at_edge (SCM first, SCM axis, SCM direction,
167 SCM second, SCM padding)
170 Molecule * m1 = unsmob_molecule (first);
171 Molecule * m2 = unsmob_molecule (second);
174 if (!m1 || !m2 || !isdir_b (direction) || !ly_axis_p (axis) || !gh_number_p (padding))
176 warning ("ly-combine-molecule-at-edge: invalid arguments");
178 return r.smobbed_copy ();
183 result.add_at_edge (Axis (gh_scm2int (axis)), Direction (gh_scm2int (direction)),
184 *m2, gh_scm2double (padding));
186 return result.smobbed_copy ();
191 make_molecule (SCM expr, SCM xext, SCM yext)
196 Box b (ly_scm2interval (xext), ly_scm2interval(yext));
197 Molecule m (b, expr);
198 return m.smobbed_copy ();
205 scm_c_define_gsubr ("ly-make-molecule", 3, 0, 0, (Scheme_function_unknown) make_molecule);
206 scm_c_define_gsubr ("ly-combine-molecule-at-edge", 5 , 0, 0, (Scheme_function_unknown) Molecule::ly_molecule_combined_at_edge);
207 scm_c_define_gsubr ("ly-set-molecule-extent!", 3 , 0, 0, (Scheme_function_unknown) Molecule::ly_set_molecule_extent_x);
208 scm_c_define_gsubr ("ly-get-molecule-extent", 2 , 0, 0, (Scheme_function_unknown) Molecule::ly_get_molecule_extent);
210 ADD_SCM_INIT_FUNC (molecule,molecule_init);
214 Molecule::empty_b () const
216 return expr_ == SCM_EOL;
220 fontify_atom (Font_metric * met, SCM f)
225 return scm_list_n (ly_symbol2scm ("fontify"),
226 ly_quote_scm (met->description_), f, SCM_UNDEFINED);
230 Molecule::get_expr () const
238 Molecule::extent_box () const
242 IMPLEMENT_SIMPLE_SMOBS (Molecule);
246 Molecule::print_smob (SCM s, SCM port, scm_print_state *)
249 scm_puts ("#<Molecule ", port);
251 Molecule *r = (Molecule *) ly_cdr (s);
252 String str (r->str ());
253 scm_puts ((char *)str.ch_C (), port);
255 scm_puts (" >", port);
262 Molecule::mark_smob (SCM s)
264 Molecule *r = (Molecule *) ly_cdr (s);
269 IMPLEMENT_TYPE_P (Molecule, "molecule?");
270 IMPLEMENT_DEFAULT_EQUAL_P (Molecule);