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
])));