-/*
- single-malt-grouping-item.cc -- implement Separation_item
-
+/*
+ separation-item.cc -- implement Separation_item
+
source file of the GNU LilyPond music typesetter
-
- (c) 1998--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+
+ (c) 1998--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
#include "separation-item.hh"
+
+#include "skyline.hh"
#include "paper-column.hh"
-#include "debug.hh"
-#include "group-interface.hh"
+#include "warn.hh"
+#include "pointer-group-interface.hh"
+#include "accidental-placement.hh"
void
-Separation_item::set_interface (Grob*s)
+Separation_item::add_item (Grob *s, Item *i)
{
- s->set_extent_callback (SCM_EOL, X_AXIS);
- s->set_extent_callback (SCM_EOL, Y_AXIS);
+ assert (i);
+ Pointer_group_interface::add_grob (s, ly_symbol2scm ("elements"), i);
}
void
-Separation_item::add_item (Grob*s,Item* i)
+Separation_item::add_conditional_item (Grob *me, Grob *e)
{
- assert (i);
- Pointer_group_interface::add_element (s,"elements",i);
- s->add_dependency (i);
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("conditional-elements"), e);
}
-Interval
-Separation_item::my_width (Grob *me)
+void
+Separation_item::set_skyline_distance (Drul_array<Item *> items,
+ Real padding)
{
- Item *item = dynamic_cast<Item*> (me);
- Paper_column * pc = item->column_l ();
- Interval w;
+ Drul_array<Skyline_pair*> lines (Skyline_pair::unsmob (items[LEFT]->get_property ("skylines")),
+ Skyline_pair::unsmob (items[RIGHT]->get_property ("skylines")));
+ Skyline right = conditional_skyline (items[RIGHT], items[LEFT]);
+ right.merge ((*lines[RIGHT])[LEFT]);
- for (SCM s = me->get_grob_property ("elements"); gh_pair_p (s); s = gh_cdr (s))
+ Real dist = padding + (*lines[LEFT])[RIGHT].distance (right);
+ if (dist > 0)
{
- SCM elt = gh_car (s);
- if (!unsmob_grob (elt))
- continue;
+ Rod rod;
- Item *il = dynamic_cast<Item*> (unsmob_grob (elt));
- if (pc != il->column_l ())
- {
- /* this shouldn't happen, but let's continue anyway. */
- programming_error (_ ("Separation_item: I've been drinking too much"));
- continue; /*UGH UGH*/
- }
+ rod.item_drul_ = items;
+
+ rod.distance_ = dist;
+ rod.add_to_cols ();
+ }
+}
+
+bool
+Separation_item::set_distance (Drul_array<Item *> items,
+ Real padding)
+{
+ set_skyline_distance (items, padding);
+ return true;
+}
+
+/*
+ Return the width of ME given that we are considering the object on
+ the LEFT.
+*/
+Skyline
+Separation_item::conditional_skyline (Grob *me, Grob *left)
+{
+ vector<Box> bs = boxes (me, left);
+ return Skyline (bs, 0.1, Y_AXIS, LEFT);
+}
+
+
+MAKE_SCHEME_CALLBACK(Separation_item,calc_skylines,1);
+SCM
+Separation_item::calc_skylines (SCM smob)
+{
+ Item *me = unsmob_item (smob);
+ vector<Box> bs = boxes (me, 0);
+ /* todo: the horizon_padding is somewhat arbitrary */
+ return Skyline_pair (bs, 0.1, Y_AXIS).smobbed_copy ();
+}
+
+/* if left is non-NULL, get the boxes corresponding to the
+ conditional-elements (conditioned on the grob LEFT). This
+ sounds more general than it is: conditional-elements are
+ always accidentals attached to a tied note.
+*/
+vector<Box>
+Separation_item::boxes (Grob *me, Grob *left)
+{
+ Item *item = dynamic_cast<Item *> (me);
+
+ int very_large = INT_MAX;
+ Paper_column *pc = item->get_column ();
+ vector<Box> out;
+ extract_grob_set (me, left ? "conditional-elements" : "elements", read_only_elts);
+ vector<Grob*> elts;
- if (to_boolean (il->get_grob_property ("no-spacing-rods")))
+ if (left)
+ elts = Accidental_placement::get_break_reminder_accidentals (read_only_elts, left);
+ else
+ elts = read_only_elts;
+
+ Grob *ycommon = common_refpoint_of_array (elts, me, Y_AXIS);
+
+ for (vsize i = 0; i < elts.size (); i++)
+ {
+ Item *il = dynamic_cast<Item *> (elts[i]);
+ if (pc != il->get_column ())
{
continue;
}
- Interval iv (il->extent (pc, X_AXIS));
- if (!iv.empty_b ())
+ Interval y (il->pure_height (ycommon, 0, very_large));
+ Interval x (il->extent (pc, X_AXIS));
+
+ Interval extra = robust_scm2interval (elts[i]->get_property ("extra-spacing-width"),
+ Interval (0, 0));
+ x[LEFT] += extra[LEFT];
+ x[RIGHT] += extra[RIGHT];
+ if (to_boolean (elts[i]->get_property ("infinite-spacing-height")))
+ y = Interval (-infinity_f, infinity_f);
+
+ out.push_back (Box (x, y));
+ }
+
+ return out;
+}
+
+Interval
+Separation_item::width (Grob *me)
+{
+ SCM sw = me->get_property ("X-extent");
+ return ly_scm2interval (sw);
+}
+
+Interval
+Separation_item::relative_width (Grob *me, Grob *common)
+{
+ Interval iv = width (me);
+
+ return dynamic_cast<Item *> (me)->get_column ()->relative_coordinate (common, X_AXIS) + iv;
+}
+
+/*
+ Try to find the break-aligned symbol in SEPARATION_ITEM that is
+ sticking out at direction D. The x size is put in LAST_EXT
+*/
+Grob *
+Separation_item::extremal_break_aligned_grob (Grob *me,
+ Direction d,
+ Interval *last_ext)
+{
+ Grob *col = dynamic_cast<Item *> (me)->get_column ();
+ last_ext->set_empty ();
+ Grob *last_grob = 0;
+
+ extract_grob_set (me, "elements", elts);
+ for (vsize i = elts.size (); i--;)
+ {
+ Grob *break_item = elts[i];
+ if (!scm_is_symbol (break_item->get_property ("break-align-symbol")))
+ continue;
+
+ if (!scm_is_pair (break_item->get_property ("space-alist")))
+ continue;
+
+ Interval ext = break_item->extent (col, X_AXIS);
+
+ if (ext.is_empty ())
+ continue;
+
+ if (!last_grob
+ || (last_grob && d * (ext[d]- (*last_ext)[d]) > 0))
{
- w.unite (iv);
+ *last_ext = ext;
+ last_grob = break_item;
}
}
- return w;
- // add this->offset_ ? this-> relative_coordinate ()?
+ return last_grob;
}
+ADD_INTERFACE (Separation_item,
+ "Item that computes widths to generate spacing rods. "
+ "This is done in concert with @ref{separating-group-spanner-interface}.",
-
+ "X-extent "
+ "conditional-elements "
+ "elements "
+ "padding "
+ "skylines "
+ );
projects / lilypond.git / blobdiff