source file of the GNU LilyPond music typesetter
- (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2000--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "grob.hh"
#include "group-interface.hh"
#include "axis-group-interface.hh"
+#include "hara-kiri-group-spanner.hh"
#include "paper-def.hh"
-/*
- This callback is set in the children of the align element. It does
- not compute anything, but a side effect of a->do_side_processing ()
- is that the elements are placed correctly. */
-MAKE_SCHEME_CALLBACK(Align_interface,alignment_callback,2);
+MAKE_SCHEME_CALLBACK (Align_interface,alignment_callback,2);
SCM
Align_interface::alignment_callback (SCM element_smob, SCM axis)
{
- Grob * me = unsmob_element (element_smob);
- Axis ax = (Axis )gh_scm2int (axis);
- Grob * par = me->parent_l (ax);
+ Grob * me = unsmob_grob (element_smob);
+ Axis ax = (Axis)gh_scm2int (axis);
+ Grob * par = me->get_parent (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->get_parent (ax);
+ if (par && !to_boolean (par->get_grob_property ("alignment-done")))
+ {
+ Align_interface::align_to_fixed_distance (par, ax);
+ }
+ return gh_double2scm (0.0);
+}
+
+/*
+ merge with align-to-extents?
+ */
+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_grobs (me, (Grob*) 0, "elements");
+
+ Real where_f=0;
+
+ Interval v;
+ v.set_empty ();
+ Array<Real> translates;
+
+ for (int j= elems.size (); j--; )
+ {
+ /*
+ This is not very elegant, in that we need special support for
+ hara kiri. Unfortunately, the generic wiring of
+ force_hara_kiri_callback () (extent and offset callback) is
+ such that we might get into a loop if we call extent() or
+ offset() the elements.
+
+
+ */
+ if (a == Y_AXIS
+ && Hara_kiri_group_spanner::has_interface (elems[j]))
+ Hara_kiri_group_spanner::consider_suicide (elems[j]);
+
+ if (!elems[j]-> live())
+ elems.del(j);
+ }
+
+ for (int j =0; j < elems.size (); j++)
+ {
+ where_f += stacking_dir * dy;
+ translates.push (where_f);
+ v.unite (Interval (where_f, where_f));
+ }
+
+ /*
+ TODO: support self-alignment-{Y,X}
+ */
+ for (int i = 0; i < translates.size (); i++)
+ {
+ elems[i]->translate_axis (translates[i] - v.center (), 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 */
+ from the outside by setting extra-space in its
+ children
+
+ We assume that the children the refpoints of the children are still
+ found at 0.0 -- we will fuck up with thresholds if children's
+ extents are already moved to locations such as (-16, -8), since the
+ dy needed to put things in a row doesn't relate to the distances
+ between original refpoints.
+
+ TODO: maybe we should rethink and throw out thresholding altogether.
+ The original function has been taken over by
+ align_to_fixed_distance().
+*/
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;
+
+ 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 (ly_car (thr));
+ threshold[BIGGER] = gh_scm2double (ly_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_grobs (me, (Grob*) 0, "elements");
+ for (int i=0; i < all_grobs.size (); i++)
{
- Interval y = all_elts[i]->extent(me, a);
- if (!y.empty_b())
+ Interval y = all_grobs[i]->extent (me, a);
+ if (!y.empty_b ())
{
- Grob *e =dynamic_cast<Grob*>(all_elts[i]);
-
- // todo: fucks up if item both in Halign & Valign.
- SCM min_dims = e->remove_grob_property ("minimum-space");
- if (gh_pair_p (min_dims) &&
- gh_number_p (gh_car (min_dims))
- && gh_number_p (gh_cdr (min_dims)))
- {
- y.unite (ly_scm2interval (min_dims));
-
- }
-
- SCM extra_dims = e->remove_grob_property ("extra-space");
- if (gh_pair_p (extra_dims) &&
- gh_number_p (gh_car (extra_dims))
- && gh_number_p (gh_cdr (extra_dims)))
- {
- y[LEFT] += gh_scm2double (gh_car (extra_dims));
- y[RIGHT] += gh_scm2double (gh_cdr (extra_dims));
- }
+ Grob *e =dynamic_cast<Grob*> (all_grobs[i]);
elems.push (e);
dims.push (y);
}
}
-
- Interval threshold = Interval (0, Interval::infinity ());
- SCM thr = me->get_grob_property ("threshold");
- if (gh_pair_p (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.
+ */
+ static SCM prop_syms[2];
+
+ if (!prop_syms[0])
{
- Real ss = 1.0;
- threshold[SMALLER] = ss *gh_scm2double (gh_car (thr));
- threshold[BIGGER] = ss * gh_scm2double (gh_cdr (thr));
+ prop_syms[X_AXIS] = ly_symbol2scm ("self-alignment-X");
+ prop_syms[Y_AXIS] = ly_symbol2scm ("self-alignment-Y");
}
-
+
+ SCM align (me->internal_get_grob_property (prop_syms[a]));
+
+ Array<Real> translates ;
+ Interval total;
Real where_f=0;
- for (int j=0 ; j < elems.size(); j++)
+
+ for (int j=0 ; j < elems.size (); j++)
{
- Real dy = - stacking_dir * dims[j][-stacking_dir];
+ Real dy = - dims[j][-stacking_dir];
if (j)
- dy += stacking_dir * dims[j-1][stacking_dir];
+ dy += dims[j-1][stacking_dir];
+
+ /*
+ we want dy to be > 0
+ */
+ dy *= stacking_dir;
if (j)
{
- dy = (dy >? threshold[SMALLER] )
+ dy = (dy >? threshold[SMALLER])
<? threshold[BIGGER];
}
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++;
+ }
+ /*
+ FIXME: uncommenting freaks out the Y-alignment of
+ line-of-score.
+ */
+ // Real align_param = is_direction (align) ? gh_scm2double (align) : 0.0;
+
+ if (gh_number_p (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)
{
- return Axis (gh_scm2int (gh_car (me->get_grob_property ("axes"))));
+ return Axis (gh_scm2int (ly_car (me->get_grob_property ("axes"))));
}
-
-/*
- should use generic Scm funcs.
- */
-int
-Align_interface::get_count (Grob*me,Grob*s)
+void
+Align_interface::add_element (Grob*me,Grob* s, SCM cb)
{
- SCM e = me->get_grob_property ("elements");
- int c =0;
- while (gh_pair_p (e))
- {
- if (gh_car (e) == s->self_scm ())
- break;
- c++;
- e = gh_cdr (e);
- }
- return c;
+ s->add_offset_callback (cb, Align_interface::axis (me));
+ Axis_group_interface::add_element (me, s);
}
void
-Align_interface::add_element (Grob*me,Grob* s)
+Align_interface::set_axis (Grob*me,Axis a)
{
- s->add_offset_callback (Align_interface::alignment_callback_proc, Align_interface::axis (me));
- Axis_group_interface::add_element (me, s);
+ Axis_group_interface::set_axes (me, a,a);
}
-void
-Align_interface::set_interface (Grob*me)
+/*
+ Find Y-axis parent of G that has a #'forced-distance property. This
+ has the effect of finding the piano-staff given an object in that
+ piano staff.
+ */
+Grob *
+find_fixed_alignment_parent (Grob *g)
{
- me->set_interface (ly_symbol2scm ("align-interface"));
+ while (g)
+ {
+ if (gh_number_p (g->get_grob_property ("forced-distance")))
+ return g;
- Axis_group_interface::set_interface (me);
-}
+ g = g->get_parent (Y_AXIS);
+ }
-void
-Align_interface::set_axis (Grob*me,Axis a)
-{
- Axis_group_interface::set_axes (me, a,a );
+ return 0;
}
-bool
-Align_interface::has_interface (Grob*me)
+
+
+
+ADD_INTERFACE (Align_interface, "align-interface",
+ " Order grobs top to bottom/left to right/right to left etc.",
+ "forced-distance stacking-dir align-dir threshold alignment-done center-element elements axes");
+
+
+struct Foobar
{
- return me && me->has_interface (ly_symbol2scm ("align-interface"));
-}
+ bool has_interface (Grob*);
+};
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