2 separation-item.cc -- implement Separation_item
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "separation-item.hh"
11 #include "paper-column.hh"
13 #include "pointer-group-interface.hh"
14 #include "accidental-placement.hh"
17 Separation_item::add_item (Grob *s, Item *i)
20 Pointer_group_interface::add_grob (s, ly_symbol2scm ("elements"), i);
24 Separation_item::add_conditional_item (Grob *me, Grob *e)
26 Pointer_group_interface::add_grob (me, ly_symbol2scm ("conditional-elements"), e);
30 Return the width of ME given that we are considering the object on
34 Separation_item::conditional_width (Grob *me, Grob *left)
36 Interval w = width (me);
38 Item *item = dynamic_cast<Item *> (me);
39 Paper_column *pc = item->get_column ();
41 extract_grob_set (me, "conditional-elements", elts);
42 for (int i = 0; i < elts.size (); i++)
44 Item *il = dynamic_cast<Item*> (elts[i]);
45 if (pc != il->get_column ())
47 /* this shouldn't happen, but let's continue anyway. */
48 programming_error ("Separation_item: I've been drinking too much");
52 if (to_boolean (il->get_property ("no-spacing-rods")))
57 if (Accidental_placement::has_interface (il))
59 w.unite (Accidental_placement::get_relevant_accidental_extent (il, pc, left));
63 SCM pad = me->get_property ("padding");
65 w.widen (robust_scm2double (pad, 0.0));
70 Separation_item::width (Grob *me)
72 SCM sw = me->get_property ("X-extent");
73 if (is_number_pair (sw))
75 return ly_scm2interval (sw);
78 Item *item = dynamic_cast<Item *> (me);
79 Paper_column *pc = item->get_column ();
82 extract_grob_set (me, "elements", elts);
83 for (int i = 0; i < elts.size (); i++)
85 Item *il = dynamic_cast<Item*> (elts[i]);
86 if (pc != il->get_column ())
88 /* this shouldn't happen, but let's continue anyway. */
89 programming_error ("Separation_item: I've been drinking too much");
93 if (to_boolean (il->get_property ("no-spacing-rods")))
98 Interval iv (il->extent (pc, X_AXIS));
105 SCM pad = me->get_property ("padding");
107 w.widen (robust_scm2double (pad, 0.0));
109 me->set_property ("X-extent", ly_interval2scm (w));
115 Separation_item::relative_width (Grob *me, Grob *common)
117 Interval iv = width (me);
119 return dynamic_cast<Item *> (me)->get_column ()->relative_coordinate (common, X_AXIS) + iv;
123 Try to find the break-aligned symbol in SEPARATION_ITEM that is
124 sticking out at direction D. The x size is put in LAST_EXT
127 Separation_item::extremal_break_aligned_grob (Grob *me,
131 Grob *col = dynamic_cast<Item *> (me)->get_column ();
132 last_ext->set_empty ();
135 extract_grob_set (me, "elements", elts);
136 for (int i = elts.size (); i--; )
138 Grob *break_item = elts[i];
139 if (!scm_is_symbol (break_item->get_property ("break-align-symbol")))
142 Interval ext = break_item->extent (col, X_AXIS);
148 || (last_grob && d * (ext[d]- (*last_ext)[d]) > 0))
151 last_grob = break_item;
158 ADD_INTERFACE (Separation_item, "separation-item-interface",
159 "Item that computes widths to generate spacing rods. "
160 "This is done in concert with @ref{separation-spanner-interface}.",
161 "padding X-extent conditional-elements elements");