source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-
#include "span-bar.hh"
-#include "lookup.hh"
-#include "symbol.hh"
-#include "paper-def.hh"
-#include "molecule.hh"
-#include "vertical-align-elem.hh"
+
+#include "font-interface.hh"
+#include "dimensions.hh"
+#include "output-def.hh"
+#include "stencil.hh"
+#include "warn.hh"
+#include "axis-group-interface.hh"
+#include "bar-line.hh"
+#include "grob.hh"
+#include "pointer-group-interface.hh"
void
-Span_bar::add(Bar*b)
+Span_bar::add_bar (Grob *me, Grob *b)
{
- b->spanned_i_ ++;
- spanning_l_arr_.push(b);
- add_dependency( b );
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), b);
}
+MAKE_SCHEME_CALLBACK (Span_bar, print, 1);
+/* Limitations/Bugs:
-void
-Span_bar::do_substitute_dependency(Score_elem*o, Score_elem*n)
+(1) Elements from 'me->get_object ("elements")' must be
+ordered according to their y coordinates relative to their common
+axis group parent. Otherwise, the computation goes mad.
+
+(2) This method depends on bar_engraver not being removed from
+staff context. If bar_engraver is removed, the size of the staff
+lines is evaluated as 0, which results in a solid span bar line
+with faulty y coordinate. */
+
+/* This routine was originally by Juergen Reuter, but it was a on the
+ bulky side. Rewritten by Han-Wen. */
+SCM
+Span_bar::print (SCM smobbed_me)
{
- Bar * bold = 0;
- if (o->is_type_b(Bar::static_name() ))
- bold = (Bar*)o->item();
- else
- return;
-
- bold->spanned_i_ --;
- Bar * b =0;
- if (n && n->is_type_b(Bar::static_name() )) {
- b = (Bar*)n->item();
- b->spanned_i_ ++;
+ Grob *me = unsmob_grob (smobbed_me);
+ extract_grob_set (me, "elements", elements);
+ Grob *refp = common_refpoint_of_array (elements, me, Y_AXIS);
+
+ SCM glyph = me->get_property ("glyph-name");
+
+ /* glyph may not be a string, when ME is killed by Hara Kiri in
+ between. */
+ if (!scm_is_string (glyph))
+ return SCM_EOL;
+
+ string glyph_string = ly_scm2string (glyph);
+
+ /* compose span_bar_mol */
+ vector<Interval> extents;
+ vector<bool> make_span_bar;
+ Grob *model_bar = 0;
+ for (vsize i = elements.size (); i--;)
+ {
+ Grob *bar = elements[i];
+ Interval ext = Bar_line::bar_y_extent (bar, refp);
+ if (ext.is_empty ())
+ continue;
+
+ extents.push_back (ext);
+ make_span_bar.push_back (to_boolean (bar->get_property ("allow-span-bar")));
+ model_bar = bar;
+ }
+
+ if (!model_bar)
+ model_bar = me;
+
+ vector_sort (extents, Interval::left_less);
+
+ Stencil span_bar;
+ for (vsize i = 1; i < extents.size (); i++)
+ {
+ Interval prev_extent = extents[i - 1];
+ Interval ext = extents[i];
+ if (!prev_extent.is_empty ())
+ {
+ Interval l (prev_extent [UP],
+ ext[DOWN]);
+
+ if (l.is_empty () || !make_span_bar[i])
+ {
+ /* There is overlap between the bar lines. Do nothing. */
+ }
+ else
+ {
+ Stencil interbar = Bar_line::compound_barline (model_bar,
+ glyph_string,
+ l.length (),
+ false);
+ interbar.translate_axis (l.center (), Y_AXIS);
+ span_bar.add_stencil (interbar);
+ }
+ }
+ prev_extent = ext;
}
-
- spanning_l_arr_.substitute( bold , b);
+ span_bar.translate_axis (- me->relative_coordinate (refp, Y_AXIS),
+ Y_AXIS);
+
+ return span_bar.smobbed_copy ();
}
-void
-Span_bar::set(Vertical_align_element *a)
+MAKE_SCHEME_CALLBACK (Span_bar, width, 1);
+SCM
+Span_bar::width (SCM smob)
{
- add_dependency( a );
+ Grob *me = unsmob_grob (smob);
+ SCM gn = me->get_property ("glyph-name");
+ if (!me->is_live ())
+ return ly_interval2scm (Interval ());
+
+ string gl = ly_scm2string (gn);
+
+ /*
+ urg.
+ */
+ Stencil m = Bar_line::compound_barline (me, gl, 40 PT, false);
+
+ return ly_interval2scm (m.extent (X_AXIS));
}
-
-void
-Span_bar::do_pre_processing()
+MAKE_SCHEME_CALLBACK (Span_bar, before_line_breaking, 1);
+SCM
+Span_bar::before_line_breaking (SCM smob)
{
- if ( spanning_l_arr_.size () < 1) {
- transparent_b_ = true;
- empty_b_ =true;
- } else {
- type_str_ = spanning_l_arr_[0]->type_str_;
- if (type_str_ =="") {
- transparent_b_=true;
- empty_b_ = true;
- }
+ Grob *me = unsmob_grob (smob);
+ extract_grob_set (me, "elements", elements);
+ if (elements.empty ())
+ me->suicide ();
+
+ return SCM_UNSPECIFIED;
+}
+
+MAKE_SCHEME_CALLBACK (Span_bar, center_on_spanned_callback, 1);
+
+SCM
+Span_bar::center_on_spanned_callback (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ Interval i (get_spanned_interval (me));
+
+ /* Bar_line::print delivers a barline of y-extent (-h/2, h/2), so
+ we have to translate ourselves to be in the center of the
+ interval that we span. */
+ if (i.is_empty ())
+ {
+ me->suicide ();
+ return scm_from_double (0.0);
+ }
+
+ return scm_from_double (i.center ());
+}
+
+
+
+MAKE_SCHEME_CALLBACK(Span_bar, calc_glyph_name, 1);
+SCM
+Span_bar::calc_glyph_name (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ extract_grob_set (me, "elements", elements);
+ SCM gl = SCM_EOL;
+ for (vsize i = elements.size ();
+ i-- && !scm_is_string (gl);)
+ gl = elements[i]->get_property ("glyph-name");
+
+ if (!scm_is_string (gl))
+ {
+ me->suicide ();
+ return SCM_UNSPECIFIED;
}
+
+ string type = ly_scm2string (gl);
+ if (type == "|:")
+ type = ".|";
+ else if (type == ":|")
+ type = "|.";
+ else if (type == ":|:")
+ type = ".|.";
+
+ return ly_string2scm (type);
}
-Molecule*
-Span_bar::brew_molecule_p()const
+Interval
+Span_bar::get_spanned_interval (Grob *me)
{
- Interval y;
- for (int i=0; i < spanning_l_arr_.size(); i++)
- y.unite( spanning_l_arr_[i]->height() );
- Symbol s = paper()->lookup_l()->bar(type_str_, y.length());
- Molecule*output = new Molecule(Atom(s));
- output->translate_y ( y[-1] );
-
- return output;
+ return ly_scm2interval (Axis_group_interface::generic_group_extent (me, Y_AXIS));
}
-IMPLEMENT_STATIC_NAME(Span_bar);
-IMPLEMENT_IS_TYPE_B1(Span_bar,Bar);
+MAKE_SCHEME_CALLBACK (Span_bar, calc_bar_size, 1);
+SCM
+Span_bar::calc_bar_size (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ Interval iv (get_spanned_interval (me));
+ if (iv.is_empty ())
+ {
+ /* This happens if the bars are hara-kiried from under us. */
+ me->suicide ();
+ return scm_from_double (-1);
+ }
+ return scm_from_double (iv.length ());
+}
+
+ADD_INTERFACE (Span_bar,
+ "A bar line that is spanned between other barlines. This"
+ " interface is used for bar lines that connect different"
+ " staves.",
+
+ /* properties */
+ "glyph-name "
+ "elements "
+ );
+
projects / lilypond.git / blobdiff