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"
21 Molecule::extent(Axis a) const
26 Molecule::Molecule (Box b, SCM func)
39 Molecule::translate (Offset o)
45 || isinf (o[a]) || isnan (o[a]))
47 programming_error ("Improbable offset for translation: setting to zero");
53 expr_ = gh_list (ly_symbol2scm ("translate-molecule"),
55 expr_, SCM_UNDEFINED);
62 Molecule::translate_axis (Real x,Axis a)
72 Molecule::add_molecule (Molecule const &m)
74 expr_ = gh_list (ly_symbol2scm ("combine-molecule"),
76 expr_, SCM_UNDEFINED);
81 Molecule::set_empty (bool e)
85 dim_[X_AXIS].set_empty ();
86 dim_[Y_AXIS].set_empty ();
90 dim_[X_AXIS] = Interval(0,0);
91 dim_[Y_AXIS] = Interval (0,0);
97 Molecule::align_to (Axis a, Direction d)
99 Interval i (extent (a));
100 Real r = (d == CENTER) ? i.center () : i[d];
101 translate_axis (-r, a);
105 Molecule::add_at_edge (Axis a, Direction d, Molecule const &m, Real padding)
107 Real my_extent= empty_b () ? 0.0 : dim_[a][d];
108 Interval i (m.extent (a));
110 programming_error ("Molecule::add_at_edge: adding empty molecule.");
112 Real his_extent = i[-d];
113 Real offset = my_extent - his_extent;
115 toadd.translate_axis (offset + d * padding, a);
116 add_molecule (toadd);
120 Molecule::empty_b () const
122 return expr_ == SCM_EOL;
126 fontify_atom(Font_metric * met, SCM f)
128 return gh_list (ly_symbol2scm ("fontify"),
129 ly_quote_scm (met->description ()), f, SCM_UNDEFINED);
133 Molecule::get_expr () const
139 create_molecule (SCM scm_mol)
141 if (!gh_pair_p (scm_mol))
144 SCM exp = gh_car (scm_mol);
145 scm_mol = gh_cdr (scm_mol);
147 if (gh_pair_p (scm_mol))
149 Interval i1 = ly_scm2interval (gh_car (scm_mol));
150 Interval i2 = ly_scm2interval (gh_cdr (scm_mol));
153 return Molecule (b, exp);
157 Molecule::create_scheme () const
159 return gh_cons (expr_,
160 gh_cons (ly_interval2scm (dim_[X_AXIS]),
161 ly_interval2scm (dim_[Y_AXIS])));