source file of the GNU LilyPond music typesetter
- (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
+#include "dimension-cache.hh"
+#include "lily-guile.hh"
#include "break-align-item.hh"
#include "dimensions.hh"
+#include "paper-score.hh"
+#include "paper-def.hh"
+#include "paper-column.hh"
+
+/*
+ Handle spacing for prefatory matter.
+
+ TODO: rewrite this. It is kludgy
+*/
void
Break_align_item::do_pre_processing()
{
- align_dir_ = break_status_dir();
- threshold_interval_[SMALLER] = 1.5 PT;
+ if (break_status_dir() == LEFT)
+ align_dir_ = LEFT;
+ else
+ align_dir_ = RIGHT;
+
flip (&align_dir_);
- Horizontal_align_item::do_pre_processing();
+ sort_elements ();
+ Real interline= paper_l ()->get_var ("interline");
+
+ Link_array<Score_element> elems;
+ for (int i=0; i < elem_l_arr_.size(); i++)
+ {
+ Interval y = elem_l_arr_[i]->extent(axis ());
+ if (!y.empty_b())
+ elems.push (dynamic_cast<Score_element*> (elem_l_arr_[i]));
+ }
+
+ if (!elems.size ())
+ return;
+
+ SCM symbol_list = SCM_EOL;
+ Array<Real> dists;
+ SCM current_origin = ly_str02scm ("");
+ for (int i=0; i <= elems.size (); i++)
+ {
+ Score_element *next_elt = i < elems.size ()
+ ? elems[i]
+ : 0 ;
+
+ SCM next_origin;
+
+ if (next_elt)
+ {
+ next_origin = next_elt->get_elt_property ("origin");
+ next_origin =
+ (next_origin == SCM_UNDEFINED)
+ ? ly_str02scm ("")
+ : next_origin;
+ }
+ else
+ next_origin = ly_str02scm ("begin-of-note");
+
+ SCM extra_space
+ = scm_eval (scm_listify (ly_symbol2scm ("break-align-spacer"),
+ current_origin, next_origin, SCM_UNDEFINED));
+ SCM symbol = SCM_CAR (extra_space);
+ Real spc = gh_scm2double (SCM_CADR(extra_space));
+ spc *= interline;
+
+ dists.push(spc);
+ symbol_list = gh_cons (symbol, symbol_list);
+ current_origin = next_origin;
+ }
+
+
+ // skip the first sym.
+ symbol_list = SCM_CDR (scm_reverse (symbol_list));
+ for (int i=0; i <elems.size()-1; i++)
+ {
+ String sym_str = ly_scm2string (SCM_CAR (symbol_list));
+ elems[i]->set_elt_property (sym_str,
+ scm_cons (gh_double2scm (0),
+ gh_double2scm (dists[i+1])));
+
+ symbol_list = SCM_CDR (symbol_list);
+ }
+
+
+ // urg
+ SCM first_pair = elems[0]->get_elt_property ("minimum-space");
+ if (first_pair == SCM_UNDEFINED)
+ first_pair = gh_cons (gh_double2scm (0.0), gh_double2scm (0.0));
+ else
+ first_pair = first_pair;
+
+ scm_set_car_x (first_pair, gh_double2scm (-dists[0]));
+ elems[0]->set_elt_property ("minimum-space", first_pair);
+
+ Axis_align_item::do_pre_processing();
+
+
+ Real pre_space = elems[0]->extent (X_AXIS)[LEFT]
+ + elems[0]->relative_coordinate (column_l (), X_AXIS);
+ Real spring_len = elems.top ()->extent (X_AXIS)[RIGHT]
+ + elems.top ()->relative_coordinate (column_l (), X_AXIS);
+
+ Real stretch_distance =0.;
+
+ if (SCM_CAR (symbol_list) == ly_symbol2scm ("extra-space"))
+ {
+ spring_len += dists.top ();
+ stretch_distance = dists.top ();
+ }
+ else if (SCM_CAR (symbol_list) == ly_symbol2scm ("minimum-space"))
+ {
+ spring_len = spring_len >? dists.top ();
+ stretch_distance = spring_len;
+ }
+
+ /*
+ Hint the spacing engine how much space to put in.
+
+
+ The pairs are in the format of an interval (ie. CAR < CDR).
+ */
+ column_l ()->set_elt_property ("extra-space",
+ scm_cons (gh_double2scm (pre_space),
+ gh_double2scm (spring_len)));
+
+ column_l ()->set_elt_property ("stretch-distance",
+ gh_cons (gh_double2scm (-dists[0]),
+ gh_double2scm (stretch_distance)));
+
}
-IMPLEMENT_IS_TYPE_B1(Break_align_item, Horizontal_align_item);
+Break_align_item::Break_align_item ()
+{
+ stacking_dir_ = RIGHT;
+ set_axis (X_AXIS);
+}