2 stencil.cc -- implement Stencil
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 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"
19 #include "ly-smobs.icc"
23 Stencil::origin () const
29 Stencil::extent (Axis a) const
34 Stencil::Stencil (Box b, SCM func)
47 Stencil::translate (Offset o)
52 if (abs (o[a]) > 100 CM
53 || isinf (o[a]) || isnan (o[a]))
55 programming_error ("Improbable offset for translation: setting to zero");
61 expr_ = scm_list_n (ly_symbol2scm ("translate-stencil"),
63 expr_, SCM_UNDEFINED);
70 Stencil::translate_axis (Real x, Axis a)
78 Stencil::add_stencil (Stencil const &s)
80 expr_ = scm_list_n (ly_symbol2scm ("combine-stencil"),
81 s.expr_, expr_, SCM_UNDEFINED);
86 Stencil::set_empty (bool e)
90 dim_[X_AXIS].set_empty ();
91 dim_[Y_AXIS].set_empty ();
95 dim_[X_AXIS] = Interval (0,0);
96 dim_[Y_AXIS] = Interval (0,0);
101 Stencil::align_to (Axis a, Real x)
106 Interval i (extent (a));
107 translate_axis (-i.linear_combination (x), a);
111 TODO: unintuitive naming, you would expect *this to be moved. Kept
112 API for compat with add_at_edge ().
115 Stencil::moved_to_edge (Axis a, Direction d, Stencil const &s, Real padding,
118 Interval my_extent= dim_[a];
121 Interval i (s.extent (a));
125 programming_error ("Stencil::move_to_edge: adding empty stencil.");
131 Real offset = (my_extent. is_empty () ? 0.0 : my_extent[d] - his_extent)
135 toadd.translate_axis (offset,a);
138 && d *(- origin ()[a] + toadd.origin ()[a]) < minimum)
139 toadd.translate_axis ( -toadd.origin ()[a]
140 + origin ()[a] + d* minimum, a);
145 /* See scheme Function. */
147 Stencil::add_at_edge (Axis a, Direction d, Stencil const &s, Real padding,
150 add_stencil (moved_to_edge (a,d,s,padding, minimum));
153 /* Hmm... maybe this is not such a good idea ; stuff can be empty,
154 while expr_ == '() */
156 Stencil::is_empty () const
158 return expr_ == SCM_EOL;
162 Stencil::get_expr () const
168 Stencil::extent_box () const
174 Stencil::print_smob (SCM , SCM port, scm_print_state *)
176 scm_puts ("#<Stencil ", port);
177 scm_puts (" >", port);
182 Stencil::mark_smob (SCM s)
184 Stencil *r = (Stencil *) ly_cdr (s);
188 IMPLEMENT_SIMPLE_SMOBS (Stencil);
189 IMPLEMENT_TYPE_P (Stencil, "ly:stencil?");
190 IMPLEMENT_DEFAULT_EQUAL_P (Stencil);