2 staff-side.cc -- implement Staff_side_element
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "staff-side.hh"
11 #include "staff-symbol.hh"
14 #include "dimensions.hh"
15 #include "dimension-cache.hh"
17 Side_position_interface::Side_position_interface (Score_element *e)
24 Side_position_interface::add_support (Score_element*e)
26 SCM sup = elt_l_->get_elt_property ("side-support");
27 elt_l_->set_elt_property ("side-support",
28 gh_cons (e->self_scm_,sup));
34 Side_position_interface::get_direction () const
36 SCM d = elt_l_->get_elt_property ("direction");
38 return to_dir (d) ? to_dir (d) : DOWN;
40 Direction relative_dir = UP;
41 SCM reldir = elt_l_->get_elt_property ("side-relative-direction"); // should use a lambda.
44 relative_dir = to_dir (reldir);
47 SCM other_elt = elt_l_->get_elt_property ("direction-source");
48 Score_element * e = unsmob_element(other_elt);
51 return relative_dir * Side_position_interface (e).get_direction ();
58 Callback that does the aligning.
61 Side_position_interface::side_position (Dimension_cache const * c)
63 Score_element * me = dynamic_cast<Score_element*> (c->element_l ());
66 Axis axis = c->axis ();
67 Score_element *common = me->parent_l (axis);
68 SCM support = me->get_elt_property ("side-support");
69 for (SCM s = support; s != SCM_EOL; s = gh_cdr (s))
71 Score_element * e = unsmob_element ( gh_car (s));
73 common = common->common_refpoint (e, axis);
76 for (SCM s = support; s != SCM_EOL; s = gh_cdr (s))
79 Score_element * e = unsmob_element ( gh_car (s));
82 Real coord = e->relative_coordinate (common, axis);
84 dim.unite (coord + e->extent (axis));
93 Real off = me->parent_l (axis)->relative_coordinate (common, axis);
96 Direction dir = Side_position_interface (me).get_direction ();
98 SCM pad = me->remove_elt_property ("padding");
99 if (pad != SCM_UNDEFINED)
101 off += gh_scm2double (pad) * dir;
103 Real total_off = dim[dir] + off;
105 if (fabs (total_off) > 100 CM)
106 programming_error ("Huh ? Improbable staff side dim.");
112 Side_position_interface::self_alignment (Dimension_cache const *c)
114 String s ("self-alignment-");
115 Axis ax = c->axis ();
116 s += (ax == X_AXIS) ? "X" : "Y";
117 Score_element *elm = dynamic_cast<Score_element*> (c->element_l ());
118 SCM align (elm->get_elt_property (s));
121 Direction d = to_dir (align);
122 Interval ext(elm->extent (ax));
127 return - ext.center ();
135 directed_round (Real f, Direction d )
144 Side_position_interface::quantised_position (Dimension_cache const *c)
146 Score_element * me = dynamic_cast<Score_element*> (c->element_l ());
147 Side_position_interface s(me);
148 Direction d = s.get_direction ();
150 Staff_symbol_referencer *ref = dynamic_cast<Staff_symbol_referencer*> (me);
153 Real p = ref->position_f ();
154 Real rp = directed_round (d, p);
163 return (rp - p) * ref->staff_line_leading_f ();
169 Side_position_interface::aligned_side (Dimension_cache const *c)
171 Score_element * me = dynamic_cast<Score_element*> (c->element_l ());
172 Side_position_interface s(me);
173 Direction d = s.get_direction ();
174 Axis ax = c->axis ();
175 Real o = side_position (c);
177 Interval iv = me->extent (ax);
183 SCM pad = me->get_elt_property ("padding");
184 if (gh_number_p (pad))
185 o += d *gh_scm2double (pad) ;
194 Side_position_interface::set_axis (Axis a)
196 // prop transparent ?
197 if (elt_l_->get_elt_property ("side-support") == SCM_UNDEFINED)
198 elt_l_->set_elt_property ("side-support" ,SCM_EOL);
200 elt_l_->dim_cache_[a]->off_callbacks_.push (aligned_side);
205 Side_position_interface::set_quantised (Axis a)
207 Dimension_cache * c = elt_l_->dim_cache_[a];
208 for (int i=0; i < c->off_callbacks_.size (); i++)
209 if (c->off_callbacks_[i] == aligned_side)
210 c->off_callbacks_[i] = side_position ;
211 c->off_callbacks_.push (quantised_position);
215 Side_position_interface::get_axis () const
217 Dimension_cache * c = elt_l_->dim_cache_[X_AXIS];
218 for (int i=0 ; i < c->off_callbacks_.size();i ++)
219 if (c->off_callbacks_[i] == side_position
220 ||c->off_callbacks_[i] == aligned_side)
228 Side_position_interface::set_direction (Direction d)
230 elt_l_->set_elt_property ("direction", gh_int2scm (d));
234 Side_position_interface::is_staff_side_b () const
236 return elt_l_->get_elt_property ("side-support") != SCM_UNDEFINED;
240 Side_position_interface::supported_b () const
242 SCM s =elt_l_->get_elt_property ("side-support");
243 return s != SCM_UNDEFINED && s != SCM_EOL;