2 align-elem.cc -- implement Align_elem
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "align-element.hh"
10 #include "interval.hh"
11 #include "direction.hh"
13 #include "hash-table-iter.hh"
14 #include "dimension-cache.hh"
16 struct Align_element_content {
17 Graphical_element * elem_l_;
20 static int compare (Align_element_content const &h1,
21 Align_element_content const &h2)
23 return h1.priority_i_ - h2.priority_i_;
25 Align_element_content (Graphical_element *elem_l, int p)
30 Align_element_content () {
39 Align_element::add_element (Score_element*el_l)
41 int p = elem_l_arr_.size ();
42 add_element_priority (el_l, p);
46 Align_element::add_element_priority (Score_element *el, int p)
48 assert (! contains_b (el));
49 Axis_group_element::add_element (el);
50 priority_i_hash_[el] = p;
55 Align_element::do_substitute_element_pointer (Score_element*o,
58 Axis_group_element :: do_substitute_element_pointer (o,n);
63 if (priority_i_hash_.elem_b (o))
65 priority_i_hash_[n] = priority_i_hash_[o];
67 Huh? It seems the old pointers are still used. Why?
69 // priority_i_hash_.remove (o);
74 Align_element::do_post_processing()
76 if (axis () == Y_AXIS)
77 do_side_processing ();
81 Align_element::do_pre_processing ()
83 if (axis () == X_AXIS)
84 do_side_processing ();
88 Align_element::do_side_processing ()
92 Link_array<Score_element> elems;
93 for (int i=0; i < elem_l_arr_.size(); i++)
95 Interval y = elem_l_arr_[i]->extent(axis ()) + elem_l_arr_[i]->relative_coordinate (this, axis ());
98 Score_element *e =dynamic_cast<Score_element*>(elem_l_arr_[i]);
100 // todo: fucks up if item both in Halign & Valign.
101 SCM min_dims = e->remove_elt_property ("minimum-space");
102 if (min_dims != SCM_UNDEFINED)
104 y.unite (Interval (gh_scm2double (SCM_CAR (min_dims)),
105 gh_scm2double (SCM_CDR (min_dims))));
108 SCM extra_dims = e->remove_elt_property ("extra-space");
109 if (extra_dims != SCM_UNDEFINED)
111 y[LEFT] += gh_scm2double (SCM_CAR (extra_dims));
112 y[RIGHT] += gh_scm2double (SCM_CDR (extra_dims));
122 for (int i=0 ; i < elems.size(); i++)
124 Real dy = - stacking_dir_ * dims[i][-stacking_dir_];
126 dy += stacking_dir_ * dims[i-1][stacking_dir_];
130 dy = (dy >? threshold_interval_[SMALLER] )
131 <? threshold_interval_[BIGGER];
134 if (!i && align_dir_ == LEFT)
136 else if (align_dir_ == CENTER && elems[i] == center_l_)
139 where_f += stacking_dir_ * dy;
140 elems[i]->translate_axis (where_f, axis ());
144 where_f += dims.top ()[stacking_dir_];
145 if (align_dir_ == RIGHT)
147 else if (align_dir_ == CENTER && !center_l_)
148 center_f = where_f / 2;
151 translate_axis ( - center_f, axis ());
153 dim_cache_[axis ()]->invalidate ();
156 Align_element::Align_element()
159 threshold_interval_ = Interval (0, Interval::infinity ());
160 stacking_dir_ = DOWN;
163 priority_i_hash_.hash_func_ = pointer_hash;
167 Align_element::axis () const
173 Align_element::set_axis (Axis a)
180 Align_element::contains_b (Score_element const *e) const
182 return elem_l_arr_.find_l (e);
186 Align_element::sort_elements ()
188 Array<Align_element_content> content;
189 for (int i =0; i < elem_l_arr_.size(); i++)
191 Score_element * e = dynamic_cast<Score_element*> (elem_l_arr_[i]);
192 assert (priority_i_hash_.elem_b (e));
193 int p = priority_i_hash_[e];
194 content.push (Align_element_content (e, p));
196 content.sort (Align_element_content::compare);
199 priority_i_hash_.clear();
201 for (int i =0; i < content.size(); i++)
203 elem_l_arr_.push (content[i].elem_l_);
208 Align_element::do_print () const
211 DEBUG_OUT << "contains: ";
212 for (int i=0 ; i < elem_l_arr_.size(); i++)
213 DEBUG_OUT << classname (elem_l_arr_[i]) << ", ";
218 Align_element::get_elt_by_priority (int p) const
220 for (Hash_table_iter<Score_element*, int> i(priority_i_hash_); i.ok (); i++)
229 Align_element::get_priority (Score_element const * e) const
231 Score_element * nonconst = (Score_element*) e;
232 if ( priority_i_hash_.elem_b (nonconst))
233 return priority_i_hash_[nonconst];
235 return elem_l_arr_.find_i (nonconst);