2 separation-item.cc -- implement Separation_item
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #include "separation-item.hh"
14 #include "paper-column.hh"
16 #include "pointer-group-interface.hh"
17 #include "accidental-placement.hh"
20 Separation_item::add_item (Grob *s, Item *i)
23 Pointer_group_interface::add_grob (s, ly_symbol2scm ("elements"), i);
27 Separation_item::add_conditional_item (Grob *me, Grob *e)
29 Pointer_group_interface::add_grob (me, ly_symbol2scm ("conditional-elements"), e);
33 Separation_item::set_skyline_distance (Drul_array<Item *> items,
36 Drul_array<Skyline_pair*> lines (Skyline_pair::unsmob (items[LEFT]->get_property ("horizontal-skylines")),
37 Skyline_pair::unsmob (items[RIGHT]->get_property ("horizontal-skylines")));
38 Skyline right = conditional_skyline (items[RIGHT], items[LEFT]);
39 right.merge ((*lines[RIGHT])[LEFT]);
41 Real dist = padding + (*lines[LEFT])[RIGHT].distance (right);
46 rod.item_drul_ = items;
54 Separation_item::set_distance (Drul_array<Item *> items,
57 set_skyline_distance (items, padding);
62 Return the width of ME given that we are considering the object on
66 Separation_item::conditional_skyline (Grob *me, Grob *left)
68 vector<Box> bs = boxes (me, left);
69 return Skyline (bs, 0.1, Y_AXIS, LEFT);
73 MAKE_SCHEME_CALLBACK (Separation_item, calc_skylines,1);
75 Separation_item::calc_skylines (SCM smob)
77 Item *me = unsmob_item (smob);
78 vector<Box> bs = boxes (me, 0);
79 /* todo: the horizon_padding is somewhat arbitrary */
80 return Skyline_pair (bs, 0.1, Y_AXIS).smobbed_copy ();
83 /* if left is non-NULL, get the boxes corresponding to the
84 conditional-elements (conditioned on the grob LEFT). This
85 sounds more general than it is: conditional-elements are
86 always accidentals attached to a tied note.
89 Separation_item::boxes (Grob *me, Grob *left)
91 Item *item = dynamic_cast<Item *> (me);
93 int very_large = INT_MAX;
94 Paper_column *pc = item->get_column ();
96 extract_grob_set (me, left ? "conditional-elements" : "elements", read_only_elts);
100 elts = Accidental_placement::get_break_reminder_accidentals (read_only_elts, left);
102 elts = read_only_elts;
104 Grob *ycommon = common_refpoint_of_array (elts, me, Y_AXIS);
106 for (vsize i = 0; i < elts.size (); i++)
108 Item *il = dynamic_cast<Item *> (elts[i]);
109 if (pc != il->get_column ())
114 Interval y (il->pure_height (ycommon, 0, very_large));
115 Interval x (il->extent (pc, X_AXIS));
117 Interval extra = robust_scm2interval (elts[i]->get_property ("extra-spacing-width"),
119 x[LEFT] += extra[LEFT];
120 x[RIGHT] += extra[RIGHT];
121 if (to_boolean (elts[i]->get_property ("infinite-spacing-height")))
122 y = Interval (-infinity_f, infinity_f);
124 out.push_back (Box (x, y));
131 Separation_item::width (Grob *me)
133 SCM sw = me->get_property ("X-extent");
134 return ly_scm2interval (sw);
138 Separation_item::relative_width (Grob *me, Grob *common)
140 Interval iv = width (me);
142 return dynamic_cast<Item *> (me)->get_column ()->relative_coordinate (common, X_AXIS) + iv;
146 Try to find the break-aligned symbol in SEPARATION_ITEM that is
147 sticking out at direction D. The x size is put in LAST_EXT
150 Separation_item::extremal_break_aligned_grob (Grob *me,
154 Grob *col = dynamic_cast<Item *> (me)->get_column ();
155 last_ext->set_empty ();
158 extract_grob_set (me, "elements", elts);
159 for (vsize i = elts.size (); i--;)
161 Grob *break_item = elts[i];
162 if (!scm_is_symbol (break_item->get_property ("break-align-symbol")))
165 if (!scm_is_pair (break_item->get_property ("space-alist")))
168 Interval ext = break_item->extent (col, X_AXIS);
174 || (last_grob && d * (ext[d]- (*last_ext)[d]) > 0))
177 last_grob = break_item;
184 extern bool debug_skylines;
185 MAKE_SCHEME_CALLBACK (Separation_item, print, 1)
187 Separation_item::print (SCM smob)
192 Grob *me = unsmob_grob (smob);
194 if (Skyline_pair *s = Skyline_pair::unsmob (me->get_property ("horizontal-skylines")))
196 ret.add_stencil (Lookup::points_to_line_stencil (0.1, (*s)[LEFT].to_points (Y_AXIS)).in_color (255, 255, 0));
197 ret.add_stencil (Lookup::points_to_line_stencil (0.1, (*s)[RIGHT].to_points (Y_AXIS)).in_color (0, 255, 255));
199 return ret.smobbed_copy ();
202 ADD_INTERFACE (Separation_item,
203 "Item that computes widths to generate spacing rods. "
204 "This is done in concert with @ref{separating-group-spanner-interface}.",
207 "conditional-elements "
210 "horizontal-skylines "