-#include "debug.hh"
+/*
+ spanner.cc -- implement Spanner
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1996--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+#include <math.h>
+#include <libc-extension.hh>
+
+
+#include "warn.hh"
#include "spanner.hh"
-#include "p-col.hh"
+#include "paper-column.hh"
+#include "paper-score.hh"
+#include "molecule.hh"
+#include "paper-outputter.hh"
+#include "paper-column.hh"
+#include "system.hh"
+#include "group-interface.hh"
+
+void
+Spanner::do_break_processing ()
+{
+ //break_into_pieces
+ Item * left = spanned_drul_[LEFT];
+ Item * right = spanned_drul_[RIGHT];
+
+ if (!left || !right)
+ return;
+
+ /*
+ Check if our parent in X-direction spans equally wide
+ or wider than we do.
+ */
+ for (int a = X_AXIS; a < NO_AXES; a ++)
+ {
+ if (Spanner* parent = dynamic_cast<Spanner*> (get_parent ((Axis)a)))
+ {
+ if (!parent->spanned_rank_iv ().contains_b (this->spanned_rank_iv ()))
+ {
+ programming_error (to_str ("Spanner `%s' is not fully contained in parent spanner `%s'.",
+ name ().ch_C (),
+ parent->name ().ch_C ()));
+ }
+ }
+ }
+
+ if (line_l () || broken_b ())
+ return;
+
+ if (left == right)
+ {
+ /*
+ If we have a spanner spanning one column, we must break it
+ anyway because it might provide a parent for another item. */
+ Direction d = LEFT;
+ do
+ {
+ Item* bound = left->find_prebroken_piece (d);
+ if (!bound)
+ programming_error ("no broken bound");
+ else if (bound->line_l ())
+ {
+ Spanner * span_p = dynamic_cast<Spanner*> (clone ());
+ span_p->set_bound (LEFT, bound);
+ span_p->set_bound (RIGHT, bound);
+ assert (span_p->line_l ());
+ span_p->line_l ()->typeset_grob (span_p);
+ broken_into_l_arr_.push (span_p);
+ }
+ }
+ while ((flip (&d))!= LEFT);
+ }
+ else
+ {
+ Link_array<Item> break_points = pscore_l_->line_l_->broken_col_range (left,right);
+
+ break_points.insert (left,0);
+ break_points.push (right);
+
+ for (int i=1; i < break_points.size (); i++)
+ {
+ Drul_array<Item*> bounds;
+ bounds[LEFT] = break_points[i-1];
+ bounds[RIGHT] = break_points[i];
+ Direction d = LEFT;
+ do
+ {
+ if (!bounds[d]->line_l ())
+ bounds[d] = bounds[d]->find_prebroken_piece (- d);
+ }
+ while ((flip (&d))!= LEFT);
+ if (!bounds[LEFT] || ! bounds[RIGHT])
+ {
+ programming_error ("bounds of this piece aren't breakable. ");
+ continue;
+ }
-IMPLEMENT_STATIC_NAME(Spanner);
+ Spanner *span_p = dynamic_cast<Spanner*> (clone ());
+ span_p->set_bound (LEFT,bounds[LEFT]);
+ span_p->set_bound (RIGHT,bounds[RIGHT]);
+
+ if (!bounds[LEFT]->line_l ()
+
+ || !bounds[RIGHT]->line_l ()
+ || bounds[LEFT]->line_l () != bounds[RIGHT]->line_l ())
+ {
+ programming_error ("bounds of spanner are invalid");
+ span_p->suicide ();
+ }
+ else
+ {
+ bounds[LEFT]->line_l ()->typeset_grob (span_p);
+ broken_into_l_arr_.push (span_p);
+ }
+ }
+ }
+ broken_into_l_arr_.sort (Spanner::compare);
+}
void
-Spanner::do_print()const
+Spanner::set_my_columns ()
+{
+ Direction i = (Direction) LEFT;
+ do
+ {
+ if (!spanned_drul_[i]->line_l ())
+ set_bound (i,spanned_drul_[i]->find_prebroken_piece ((Direction) -i));
+ }
+ while (flip (&i) != LEFT);
+}
+
+Interval_t<int>
+Spanner::spanned_rank_iv ()
{
- mtor << " (unknown) ";
+ Interval_t<int> iv (0, 0);
+
+ if (spanned_drul_[LEFT])
+ {
+ iv[LEFT] = Paper_column::rank_i (spanned_drul_[LEFT]->column_l ());
+ }
+ if (spanned_drul_[RIGHT])
+ {
+ iv[RIGHT] = Paper_column::rank_i (spanned_drul_[RIGHT]->column_l ());
+ }
+ return iv;
}
-Spanner*
-Spanner::broken_at(PCol*c1, PCol *c2)const
+Item*
+Spanner::get_bound (Direction d) const
+{
+ return spanned_drul_ [d];
+}
+
+/*
+ Set the items that this spanner spans. If D == LEFT, we also set the
+ X-axis parent of THIS to S.
+*/
+void
+Spanner::set_bound (Direction d, Grob*s)
{
- Spanner *span_p = do_break_at(c1,c2);
+ Item * i = dynamic_cast<Item*> (s);
+ if (!i)
+ {
+ programming_error ("Must have Item for spanner bound.");
+ return;
+ }
+
+ spanned_drul_[d] =i;
- for (int i=0; i < dependant_l_arr_.size(); i++) {
- dependant_l_arr_[i]->
- substitute_dependency((Staff_elem*)this, span_p);
+ /**
+ We check for System to prevent the column -> line_of_score
+ -> column -> line_of_score -> etc situation */
+ if (d== LEFT && !dynamic_cast<System*> (this))
+ {
+ set_parent (i, X_AXIS);
}
+
+ /*
+ Signal that this column needs to be kept alive. They need to be
+ kept alive to have meaningful position and linebreaking.
+
+ [maybe we should try keeping all columns alive?, and perhaps
+ inherit position from their (non-)musical brother]
- span_p->left_col_l_ = c1;
- span_p->right_col_l_ = c2;
-
- return span_p;
+ */
+ if (dynamic_cast<Paper_column*> (i))
+ {
+ Pointer_group_interface::add_grob (i, ly_symbol2scm ("bounded-by-me"), this);
+ }
+}
+
+Spanner::Spanner (SCM s)
+ : Grob (s)
+{
+ spanned_drul_[LEFT]=0;
+ spanned_drul_[RIGHT]=0;
+ Group_interface::add_thing (this, ly_symbol2scm ("interfaces"), ly_symbol2scm ("spanner-interface"));
+
+
+}
+
+Spanner::Spanner (Spanner const &s)
+ : Grob (s)
+{
+ spanned_drul_[LEFT] = spanned_drul_[RIGHT] =0;
+}
+
+Real
+Spanner::spanner_length () const
+{
+ Real l = spanned_drul_[LEFT]->relative_coordinate (0, X_AXIS);
+ Real r = spanned_drul_[RIGHT]->relative_coordinate (0, X_AXIS);
+
+ if (r< l)
+ programming_error ("spanner with negative length");
+
+ return r-l;
+}
+
+System *
+Spanner::line_l () const
+{
+ if (!spanned_drul_[LEFT] || !spanned_drul_[RIGHT])
+ return 0;
+ if (spanned_drul_[LEFT]->line_l () != spanned_drul_[RIGHT]->line_l ())
+ return 0;
+ return spanned_drul_[LEFT]->line_l ();
+}
+
+
+Grob*
+Spanner::find_broken_piece (System*l) const
+{
+ int idx = binsearch_link_array (broken_into_l_arr_, (Spanner*)l, Spanner::compare);
+
+ if (idx < 0)
+ return 0;
+ else
+ return broken_into_l_arr_ [idx];
+}
+
+
+int
+Spanner::compare (Spanner * const &p1, Spanner * const &p2)
+{
+ return p1->line_l ()->rank_i_ - p2->line_l ()->rank_i_;
}
-Spanner::Spanner()
+bool
+Spanner::broken_b () const
{
- left_col_l_ = right_col_l_ = 0;
+ return broken_into_l_arr_.size ();
}
-Interval
-Spanner::width()const
+/*
+ If this is a broken spanner, return the amount the left end is to be
+ shifted horizontally so that the spanner starts after the initial
+ clef and key on the staves. This is necessary for ties, slurs,
+ crescendo and decrescendo signs, for example.
+*/
+Real
+Spanner::get_broken_left_end_align () const
{
- Real r = right_col_l_->hpos;
- Real l = left_col_l_->hpos;
- assert(*left_col_l_ < *right_col_l_);
- assert(r>=l);
+ Paper_column *sc = dynamic_cast<Paper_column*> (spanned_drul_[LEFT]->column_l ());
+
+ // Relevant only if left span point is first column in line
+ if (sc != NULL &&
+ sc->break_status_dir () == RIGHT)
+ {
+ /*
- return Interval(0, r-l);
+ We used to do a full search for the Break_align_item.
+ But that doesn't make a difference, since the Paper_column
+ is likely to contain only a Break_align_item.
+ */
+ return sc->extent (sc, X_AXIS)[RIGHT];
+ }
+
+ return 0.0;
}
+
+SCM
+Spanner::do_derived_mark ()
+{
+ /*
+ We'd be fucked if this is called before spanned_drul_[] is inited. */
+ if (status_c_ == ORPHAN)
+ return SCM_EOL;
+
+ Direction d = LEFT;
+ do
+ if (spanned_drul_[d])
+ scm_gc_mark (spanned_drul_[d]->self_scm ());
+ while (flip (&d) != LEFT);
+
+ for (int i= broken_into_l_arr_.size () ; i--;)
+ scm_gc_mark (broken_into_l_arr_[i]->self_scm ());
+
+ return SCM_EOL;
+}
+
+
+/*
+ Set left or right bound to IT.
+
+ Warning: caller should ensure that subsequent calls put in ITems
+ that are left-to-right ordered.
+ */
+void
+add_bound_item (Spanner* sp, Grob*it)
+{
+ if (!sp->get_bound (LEFT))
+ sp->set_bound (LEFT, it);
+ else
+ sp->set_bound (RIGHT, it);
+}
+
+
+MAKE_SCHEME_CALLBACK (Spanner,set_spacing_rods,1);
+SCM
+Spanner::set_spacing_rods (SCM smob)
+{
+ Grob*me = unsmob_grob (smob);
+
+ Rod r;
+ Spanner*sp = dynamic_cast<Spanner*> (me);
+ r.item_l_drul_[LEFT] = sp->get_bound (LEFT);
+ r.item_l_drul_[RIGHT] = sp->get_bound (RIGHT);
+ r.distance_f_ =
+ gh_scm2double (me->get_grob_property ("minimum-length"))
+ * 1.0;
+
+ r.add_to_cols ();
+ return SCM_UNSPECIFIED;
+}
+
+
+Spanner*
+unsmob_spanner (SCM s )
+{
+ return dynamic_cast<Spanner*> (unsmob_grob (s));
+}
+
+ADD_INTERFACE(Spanner,
+ "spanner-interface",
+ "
+Other grobs have a shape that depends on the horizontal spacing. For
+example, slur, beam, tie, etc. These grobs form a subtype called
+@code{Spanner}. All spanners have two span-points (these must be
+@code{Item}s), one on the left and one on the right. The left bound is
+also the X-reference point of the spanner.
+",
+ "minimum-length");