source file of the GNU LilyPond music typesetter
- (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2000--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
SCM
Align_interface::alignment_callback (SCM element_smob, SCM axis)
{
- Grob * me = unsmob_element (element_smob);
+ Grob * me = unsmob_grob (element_smob);
Axis ax = (Axis )gh_scm2int (axis);
Grob * par = me->parent_l (ax);
if (par && !to_boolean (par->get_grob_property ("alignment-done")))
{
- Align_interface::do_side_processing (par, ax);
+ Align_interface::align_elements_to_extents (par, ax);
}
return gh_double2scm (0.0);
}
+MAKE_SCHEME_CALLBACK(Align_interface,fixed_distance_alignment_callback,2);
+SCM
+Align_interface::fixed_distance_alignment_callback (SCM element_smob, SCM axis)
+{
+ Grob * me = unsmob_grob (element_smob);
+ Axis ax = (Axis )gh_scm2int (axis);
+ Grob * par = me->parent_l (ax);
+ if (par && !to_boolean (par->get_grob_property ("alignment-done")))
+ {
+ Align_interface::align_to_fixed_distance (par, ax);
+ }
+ return gh_double2scm (0.0);
+}
+
+void
+Align_interface::align_to_fixed_distance (Grob *me , Axis a)
+{
+ me->set_grob_property ("alignment-done", SCM_BOOL_T);
+
+ SCM d = me->get_grob_property ("stacking-dir");
+
+
+ Direction stacking_dir = gh_number_p(d) ? to_dir (d) : CENTER;
+ if (!stacking_dir)
+ stacking_dir = DOWN;
+
+
+ SCM force = me->get_grob_property ("forced-distance");
+
+ Real dy = 0.0;
+ if (gh_number_p (force))
+ {
+ dy = gh_scm2double (force);
+ }
+
+ Link_array<Grob> elems
+ = Pointer_group_interface__extract_elements ( me, (Grob*) 0, "elements");
+ Real where_f=0;
+ for (int j=0 ; j < elems.size(); j++)
+ {
+ where_f += stacking_dir * dy;
+ elems[j]->translate_axis (where_f, a);
+ }
+}
/*
Hairy function to put elements where they should be. Can be tweaked
from the outside by setting minimum-space and extra-space in its
children */
void
-Align_interface::do_side_processing (Grob * me, Axis a)
+Align_interface::align_elements_to_extents (Grob * me, Axis a)
{
me->set_grob_property ("alignment-done", SCM_BOOL_T);
SCM d = me->get_grob_property ("stacking-dir");
+
+
Direction stacking_dir = gh_number_p(d) ? to_dir (d) : CENTER;
if (!stacking_dir)
stacking_dir = DOWN;
+
+
+ Interval threshold = Interval (0, Interval::infinity ());
+ SCM thr = me->get_grob_property ("threshold");
+ if (gh_pair_p (thr))
+ {
+ threshold[SMALLER] = gh_scm2double (gh_car (thr));
+ threshold[BIGGER] = gh_scm2double (gh_cdr (thr));
+ }
+
Array<Interval> dims;
Link_array<Grob> elems;
- Link_array<Grob> all_elts
- = Pointer_group_interface__extract_elements ( me, (Grob*) 0, "elements");
- for (int i=0; i < all_elts.size(); i++)
+ Link_array<Grob> all_grobs
+ = Pointer_group_interface__extract_elements (me, (Grob*) 0, "elements");
+ for (int i=0; i < all_grobs.size(); i++)
{
- Interval y = all_elts[i]->extent(me, a);
+ Interval y = all_grobs[i]->extent(me, a);
if (!y.empty_b())
{
- Grob *e =dynamic_cast<Grob*>(all_elts[i]);
+ Grob *e =dynamic_cast<Grob*>(all_grobs[i]);
// todo: fucks up if item both in Halign & Valign.
SCM min_dims = e->remove_grob_property ("minimum-space");
&& gh_number_p (gh_cdr (min_dims)))
{
y.unite (ly_scm2interval (min_dims));
-
}
SCM extra_dims = e->remove_grob_property ("extra-space");
dims.push (y);
}
}
-
- Interval threshold = Interval (0, Interval::infinity ());
- SCM thr = me->get_grob_property ("threshold");
- if (gh_pair_p (thr))
- {
- Real ss = 1.0;
- threshold[SMALLER] = ss *gh_scm2double (gh_car (thr));
- threshold[BIGGER] = ss * gh_scm2double (gh_cdr (thr));
- }
+
+ /*
+ Read self-alignment-X and self-alignment-Y. This may seem like
+ code duplication. (and really: it is), but this is necessary to
+ prevent ugly cyclic dependencies that arise when you combine
+ self-alignment on a child with alignment of children.
+ */
+
+ String s ("self-alignment-");
+
+ s += (a == X_AXIS) ? "X" : "Y";
+ SCM align (me->get_grob_property (s.ch_C()));
+
+ Array<Real> translates ;
+ Interval total;
Real where_f=0;
+
for (int j=0 ; j < elems.size(); j++)
{
- Real dy = - stacking_dir * dims[j][-stacking_dir];
+ Real dy = 0.0;
+ dy = - stacking_dir * dims[j][-stacking_dir];
if (j)
dy += stacking_dir * dims[j-1][stacking_dir];
}
where_f += stacking_dir * dy;
- elems[j]->translate_axis (where_f, a);
+ total.unite ( dims[j] + where_f);
+ translates.push (where_f);
}
-}
+
+
+ Grob * align_center = unsmob_grob (align);
+ Real center_offset = 0.0;
+
+ /*
+ also move the grobs that were empty, to maintain spatial order.
+ */
+ Array<Real> all_translates;
+ if (translates.size ())
+ {
+ int i =0;
+ int j =0;
+ Real w = translates[0];
+ while (j < all_grobs.size ())
+ {
+ if (i < elems.size () && all_grobs[j] == elems[i])
+ {
+ w = translates[i++];
+ }
+ if (all_grobs[j] == align_center)
+ center_offset = w;
+ all_translates .push (w);
+ j++;
+ }
+ }
+
+ if (isdir_b (align))
+ {
+ center_offset = total.linear_combination (gh_scm2double (align));
+ }
+
+ for (int j = 0 ; j < all_grobs.size (); j++)
+ all_grobs[j]->translate_axis (all_translates[j] - center_offset, a);
+}
Axis
Align_interface::axis (Grob*me)
}
void
-Align_interface::add_element (Grob*me,Grob* s)
+Align_interface::add_element (Grob*me,Grob* s, SCM cb)
{
- s->add_offset_callback (Align_interface::alignment_callback_proc, Align_interface::axis (me));
+ s->add_offset_callback (cb, Align_interface::axis (me));
Axis_group_interface::add_element (me, s);
}
projects / lilypond.git / blobdiff