+/*
+ spanner.cc -- implement Spanner
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1996--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+#include <math.h>
+#include <libc-extension.hh>
+
+
#include "debug.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 "line-of-score.hh"
+#include "break-align-item.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*> (parent_l ((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'.",
+ classname (this),
+ classname (parent)));
+ }
+ }
+ }
+
+ 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_element (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;
+ }
+ Spanner *span_p = dynamic_cast<Spanner*>(clone ());
+ span_p->set_bound(LEFT,bounds[LEFT]);
+ span_p->set_bound(RIGHT,bounds[RIGHT]);
-IMPLEMENT_STATIC_NAME(Spanner);
+ assert (bounds[LEFT]->line_l () ==
+ bounds[RIGHT]->line_l ());
+
+ bounds[LEFT]->line_l ()->typeset_element (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 ()
+{
+ 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;
+}
+
+Item*
+Spanner::get_bound (Direction d) const
{
- mtor << " (unknown) ";
+ return spanned_drul_ [d];
}
-Spanner*
-Spanner::broken_at(PCol*c1, PCol *c2)const
+void
+Spanner::set_bound(Direction d, Score_element*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 Line_of_score to prevent the column -> line_of_score
+ -> column -> line_of_score -> etc situation */
+ if (d== LEFT && !dynamic_cast<Line_of_score*> (this))
+ {
+ set_parent (i, X_AXIS);
}
-
- span_p->left_col_l_ = c1;
- span_p->right_col_l_ = c2;
-
- return span_p;
}
-Spanner::Spanner()
+
+Spanner::Spanner (SCM s)
+ : Score_element (s)
+{
+ spanned_drul_[LEFT]=0;
+ spanned_drul_[RIGHT]=0;
+}
+
+Spanner::Spanner (Spanner const &s)
+ : Score_element (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;
+}
+
+Line_of_score *
+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();
+}
+
+
+Score_element*
+Spanner::find_broken_piece (Line_of_score*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_;
+}
+
+bool
+Spanner::broken_b() const
{
- left_col_l_ = right_col_l_ = 0;
+ return broken_into_l_arr_.size();
}
-Interval
-Spanner::do_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 (X_AXIS)[RIGHT];
+ }
+
+ return 0.0;
+}
+
+void
+Spanner::do_derived_mark ()
+{
+ 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_);
+}
+
+void
+add_bound_item (Spanner* sp, Item*it)
+{
+ if (!sp->get_bound (LEFT))
+ sp->set_bound (LEFT, it);
+ else
+ sp->set_bound (RIGHT, it);
}
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