2 separation-item.cc -- implement Separation_item
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #include "separation-item.hh"
12 #include "paper-column.hh"
14 #include "pointer-group-interface.hh"
15 #include "accidental-placement.hh"
18 Separation_item::add_item (Grob *s, Item *i)
21 Pointer_group_interface::add_grob (s, ly_symbol2scm ("elements"), i);
25 Separation_item::add_conditional_item (Grob *me, Grob *e)
27 Pointer_group_interface::add_grob (me, ly_symbol2scm ("conditional-elements"), e);
31 Separation_item::set_skyline_distance (Drul_array<Item *> items,
34 Drul_array<Skyline*> lines;
39 SCM prop = items[d]->get_property ("skylines");
40 lines[d] = Skyline::unsmob (index_get_cell (prop, -d));
42 while (flip (&d) != LEFT);
44 Real dist = padding + lines[LEFT]->distance (*lines[RIGHT]);
49 rod.item_drul_ = items;
57 Separation_item::set_distance (Drul_array<Item *> items,
60 if (!Item::is_non_musical (items[LEFT])
61 && !Item::is_non_musical (items[RIGHT]))
63 set_skyline_distance (items, padding);
67 Interval li (Separation_item::width (items[LEFT]));
68 Interval ri (Separation_item::conditional_width (items[RIGHT], items[LEFT]));
69 if (!li.is_empty () && !ri.is_empty ())
73 rod.item_drul_ = items;
75 rod.distance_ = li[RIGHT] - ri[LEFT] + padding;
77 if (rod.distance_ > 0)
83 Return the width of ME given that we are considering the object on
87 Separation_item::conditional_width (Grob *me, Grob *left)
89 Interval w = width (me);
91 Item *item = dynamic_cast<Item *> (me);
92 Paper_column *pc = item->get_column ();
94 extract_grob_set (me, "conditional-elements", elts);
95 for (vsize i = 0; i < elts.size (); i++)
97 Item *il = dynamic_cast<Item *> (elts[i]);
98 if (pc != il->get_column ())
100 programming_error ("Separation_item element from wrong column");
104 if (to_boolean (il->get_property ("no-spacing-rods")))
107 if (Accidental_placement::has_interface (il))
108 w.unite (Accidental_placement::get_relevant_accidental_extent (il, pc, left));
111 SCM pad = me->get_property ("padding");
113 w.widen (robust_scm2double (pad, 0.0));
118 MAKE_SCHEME_CALLBACK(Separation_item,calc_skylines,1);
120 Separation_item::calc_skylines (SCM smob)
122 Item *me = unsmob_item (smob);
123 SCM lines = scm_cons (SCM_BOOL_F,SCM_BOOL_F);
126 vector<Box> bs = boxes (me);
129 Skyline l (bs, Y_AXIS, d);
130 index_set_cell (lines, d, l.smobbed_copy ());
132 while (flip (&d) != LEFT);
139 Separation_item::boxes (Grob *me)
141 Item *item = dynamic_cast<Item *> (me);
143 int very_large = INT_MAX;
144 Paper_column *pc = item->get_column ();
146 extract_grob_set (me, "elements", elts);
148 Grob *ycommon = common_refpoint_of_array (elts, me, Y_AXIS);
150 for (vsize i = 0; i < elts.size (); i++)
152 Item *il = dynamic_cast<Item *> (elts[i]);
153 if (pc != il->get_column ())
158 if (to_boolean (il->get_property ("no-spacing-rods")))
161 Interval y (il->pure_height (ycommon, 0, very_large));
162 y.widen (0.01); // fixme
163 Box b (il->extent (pc, X_AXIS), y);
172 Separation_item::width (Grob *me)
174 SCM sw = me->get_property ("X-extent");
175 if (is_number_pair (sw))
176 return ly_scm2interval (sw);
178 Item *item = dynamic_cast<Item *> (me);
179 Paper_column *pc = item->get_column ();
182 extract_grob_set (me, "elements", elts);
183 for (vsize i = 0; i < elts.size (); i++)
185 Item *il = dynamic_cast<Item *> (elts[i]);
186 if (pc != il->get_column ())
188 /* this shouldn't happen, but let's continue anyway. */
189 programming_error ("Separation_item: I've been drinking too much");
190 continue; /*UGH UGH*/
193 if (to_boolean (il->get_property ("no-spacing-rods")))
196 Interval iv (il->extent (pc, X_AXIS));
201 SCM pad = me->get_property ("padding");
203 w.widen (robust_scm2double (pad, 0.0));
205 me->set_property ("X-extent", ly_interval2scm (w));
211 Separation_item::relative_width (Grob *me, Grob *common)
213 Interval iv = width (me);
215 return dynamic_cast<Item *> (me)->get_column ()->relative_coordinate (common, X_AXIS) + iv;
219 Try to find the break-aligned symbol in SEPARATION_ITEM that is
220 sticking out at direction D. The x size is put in LAST_EXT
223 Separation_item::extremal_break_aligned_grob (Grob *me,
227 Grob *col = dynamic_cast<Item *> (me)->get_column ();
228 last_ext->set_empty ();
231 extract_grob_set (me, "elements", elts);
232 for (vsize i = elts.size (); i--;)
234 Grob *break_item = elts[i];
235 if (!scm_is_symbol (break_item->get_property ("break-align-symbol")))
238 if (!scm_is_pair (break_item->get_property ("space-alist")))
241 Interval ext = break_item->extent (col, X_AXIS);
247 || (last_grob && d * (ext[d]- (*last_ext)[d]) > 0))
250 last_grob = break_item;
257 ADD_INTERFACE (Separation_item,
258 "Item that computes widths to generate spacing rods. "
259 "This is done in concert with @ref{separation-spanner-interface}.",
262 "conditional-elements "