2 paper-def.cc -- implement Paper_def
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
12 #include "virtual-font-metric.hh"
13 #include "all-font-metrics.hh"
16 #include "paper-def.hh"
18 #include "scaled-font-metric.hh"
20 #include "scm-hash.hh"
21 #include "input-file-results.hh" // urg? header_global
22 #include "paper-outputter.hh"
23 #include "ly-module.hh"
26 This is an almost empty thing. The only substantial thing this class
27 handles is scaling up and down to real-world dimensions (internally
28 dimensions are against global staff-space.)
31 Paper_def::Paper_def ()
35 Paper_def::~Paper_def ()
39 Paper_def::Paper_def (Paper_def
const&src
)
40 : Music_output_def (src
)
45 Paper_def::get_realvar (SCM s
) const
47 SCM val
= lookup_variable (s
);
48 SCM scale
= lookup_variable (ly_symbol2scm ("outputscale"));
50 Real sc
= gh_scm2double (scale
);
51 return gh_scm2double (val
) / sc
;
55 FIXME. This is broken until we have a generic way of
56 putting lists inside the \paper block.
59 Paper_def::line_dimensions_int (int n
) const
61 Real lw
= get_realvar (ly_symbol2scm ("linewidth"));
62 Real ind
= n
? 0.0:get_realvar (ly_symbol2scm ("indent"));
64 return Interval (ind
, lw
);
71 Paper_def::get_paper_outputter (String outname
) const
73 progress_indication (_f ("paper output to `%s'...",
74 outname
== "-" ? String ("<stdout>") : outname
));
75 progress_indication("\n");
77 global_input_file
->target_strings_
.push (outname
);
78 Paper_outputter
* po
= new Paper_outputter (outname
);
79 Path p
= split_path (outname
);
81 po
->basename_
= p
.to_string ();
87 Todo: use symbols and hashtable idx?
90 Paper_def::find_font (SCM fn
, Real m
)
92 SCM key
= gh_cons (fn
, gh_double2scm (m
));
93 SCM met
= scm_assoc (key
, scaled_fonts_
);
96 return unsmob_metrics (ly_cdr (met
));
99 Hmm. We're chaining font - metrics. Should consider wether to merge
100 virtual-font and scaled_font.
105 f
= new Virtual_font_metric (fn
, m
, this); // TODO: GC protection.
107 scaled_fonts_
= scm_acons (key
, f
->self_scm (), scaled_fonts_
);
108 scm_gc_unprotect_object (f
->self_scm ());
112 SCM scale_var
= ly_module_lookup (scope_
, ly_symbol2scm ("outputscale"));
114 m
/= gh_scm2double (scm_variable_ref (scale_var
));
116 f
= all_fonts_global
->find_font (ly_scm2string (fn
));
117 SCM val
= Scaled_font_metric::make_scaled_font_metric (f
, m
);
118 scaled_fonts_
= scm_acons (key
, val
, scaled_fonts_
);
119 scm_gc_unprotect_object (val
);
121 f
= unsmob_metrics (val
);
129 Return alist to translate internally used fonts back to real-world
132 Paper_def::font_descriptions ()const
135 for (SCM s
= scaled_fonts_
; gh_pair_p (s
); s
= ly_cdr (s
))
137 SCM desc
= ly_caar (s
);
138 if (!gh_string_p (gh_car (desc
)))
141 SCM mdesc
= unsmob_metrics (ly_cdar (s
))->description_
;
143 l
= gh_cons (gh_cons (mdesc
, desc
), l
);
151 return dynamic_cast<Paper_def
*> (unsmob_music_output_def (x
));
155 LY_DEFINE (ly_paper_def_p
, "ly:paper-def?",
157 "Is @var{def} a paper definition?")
159 Paper_def
*op
= dynamic_cast<Paper_def
*> (unsmob_music_output_def (def
));
162 return gh_bool2scm (pap
);