source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "dimension-cache.hh"
+
#include "span-bar.hh"
-#include "lookup.hh"
+#include "font-interface.hh"
#include "dimensions.hh"
#include "paper-def.hh"
#include "molecule.hh"
#include "warn.hh"
#include "axis-group-interface.hh"
#include "group-interface.hh"
+#include "grob.hh"
+#include "bar.hh"
void
-Span_bar::add_bar (Score_element*b)
+Span_bar::add_bar (Grob*me, Grob*b)
{
- Pointer_group_interface gi (this);
- gi.add_element (b);
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), b);
- add_dependency (b);
+ me->add_dependency (b);
}
+MAKE_SCHEME_CALLBACK (Span_bar,brew_molecule,1);
+
+/**
+ * Limitations/Bugs:
+ *
+ * (1) Elements from 'me->get_grob_property ("elements")' must be
+ * ordered according to their y coordinates relative to their common
+ * axis group parent. Otherwise, the computation goes mad. (TODO:
+ * apply a sort algorithm that ensures this precondition.) However,
+ * until now, I have seen no case where lily has not fulfilled this
+ * precondition.
+ *
+ * (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.
+ */
-Interval
-Span_bar::width_callback (Score_element const *se, Axis )
+/*
+ This routine was originally by Juergen Reuter, but it was a on the
+ bulky side. Rewritten by Han-Wen.
+ */
+SCM
+Span_bar::brew_molecule (SCM smobbed_me)
{
- Span_bar* s= dynamic_cast<Span_bar*> ((Score_element*)se);
- String gl = ly_scm2string (s->get_elt_property ("glyph"));
+ Grob *me = unsmob_grob (smobbed_me);
+ SCM first_elt = me->get_grob_property ("elements");
+
+ // compute common refpoint of elements
+ Grob *refp = me;
+ for (SCM elts = first_elt; gh_pair_p (elts); elts = ly_cdr (elts))
+ {
+ SCM smobbed_staff_bar = ly_car (elts);
+ Grob *staff_bar = unsmob_grob (smobbed_staff_bar);
+ refp = staff_bar->common_refpoint (refp, Y_AXIS);
+ }
+
+ Span_bar::evaluate_glyph(me);
+ SCM glyph = me->get_grob_property ("glyph");
/*
- urg.
- */
- Molecule m = s->compound_barline (gl, 40 PT);
+ glyph may not be a string, when ME is killed by Hara Kiri in
+ between.
+ */
+ if (!gh_string_p (glyph))
+ return SCM_EOL;
- return m.extent (X_AXIS);
+ String glyph_str = ly_scm2string (glyph);
+
+ // compose span_bar_mol
+ Molecule span_bar_mol;
+
+ Interval prev_extent;
+ for (SCM elts = first_elt; gh_pair_p (elts); elts = ly_cdr (elts))
+ {
+ SCM smobbed_staff_bar = ly_car (elts);
+ Grob *staff_bar = unsmob_grob (smobbed_staff_bar);
+ Interval ext = staff_bar->extent (refp, Y_AXIS);
+ if (ext.empty_b ())
+ continue;
+
+ if (!prev_extent.empty_b ())
+ {
+ Interval l(prev_extent [UP],
+ ext[DOWN]);
+
+ Molecule interbar
+ = Bar::compound_barline (staff_bar, glyph_str, l.length());
+ interbar.translate_axis (l.center (), Y_AXIS);
+ span_bar_mol.add_molecule (interbar);
+ }
+ prev_extent = ext;
+ }
+
+ span_bar_mol.translate_axis (- me->relative_coordinate (refp, Y_AXIS), Y_AXIS);
+
+ return span_bar_mol.smobbed_copy ();
}
-GLUE_SCORE_ELEMENT(Span_bar,before_line_breaking);
+MAKE_SCHEME_CALLBACK (Span_bar,width_callback,2);
SCM
-Span_bar::member_before_line_breaking ()
+Span_bar::width_callback (SCM element_smob, SCM scm_axis)
{
- Bar::member_before_line_breaking ();
+ Grob *se = unsmob_grob (element_smob);
+ Axis a = (Axis) gh_scm2int (scm_axis);
+ assert (a == X_AXIS);
+ String gl = ly_scm2string (se->get_grob_property ("glyph"));
+
+ /*
+ urg.
+ */
+ Molecule m = Bar::compound_barline (se, gl, 40 PT);
- evaluate_empty ();
+ return ly_interval2scm (m.extent (X_AXIS));
+}
- return SCM_UNDEFINED;
+MAKE_SCHEME_CALLBACK (Span_bar,before_line_breaking,1);
+SCM
+Span_bar::before_line_breaking (SCM smob)
+{
+ evaluate_empty (unsmob_grob (smob));
+ evaluate_glyph (unsmob_grob (smob));
+
+ /*
+ no need to call Bar::before_line_breaking (), because the info
+ in ELEMENTS already has been procced by Bar::before_line_breaking ().
+ */
+ return SCM_UNSPECIFIED;
}
-GLUE_SCORE_ELEMENT(Span_bar,after_line_breaking);
+MAKE_SCHEME_CALLBACK (Span_bar,center_on_spanned_callback,2);
+
SCM
-Span_bar::member_after_line_breaking ()
+Span_bar::center_on_spanned_callback (SCM element_smob, SCM axis)
{
- Interval i (get_spanned_interval ());
+ Grob *me = unsmob_grob (element_smob);
+ Axis a = (Axis) gh_scm2int (axis);
+ assert (a == Y_AXIS);
+ Interval i (get_spanned_interval (me));
/*
Bar::brew_molecule 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. */
- translate_axis (i.center (), Y_AXIS);
- return SCM_UNDEFINED;
+ if (i.empty_b ())
+ {
+ me->suicide ();
+ return gh_double2scm (0.0);
+ }
+
+ return gh_double2scm (i.center ());
}
void
-Span_bar::evaluate_empty ()
-{
- if (!gh_pair_p (get_elt_pointer ("elements")))
+Span_bar::evaluate_empty (Grob*me)
+{
+ /*
+ TODO: filter all hara-kiried out of ELEMENS list, and then
+ optionally do suicide. Call this cleanage function from
+ center_on_spanned_callback () as well.
+
+ */
+ if (!gh_pair_p (me->get_grob_property ("elements")))
{
- suicide ();
+ me->suicide ();
}
-
- SCM gl = get_elt_property ("glyph");
+}
+
+void
+Span_bar::evaluate_glyph (Grob*me)
+{
+ SCM elts = me->get_grob_property ("elements");
+ SCM glyph_symbol = ly_symbol2scm ("glyph");
+ SCM gl = SCM_EOL;
+
+ while (gh_pair_p (elts))
+ {
+ gl = unsmob_grob (gh_car (elts))->internal_get_grob_property (glyph_symbol);
+ if (gh_string_p (gl))
+ break;
+ elts =gh_cdr (elts);
+ }
+
if (!gh_string_p (gl))
{
- suicide ();
- return ;
+ me->suicide ();
+ return;
}
- else {
- String type_str = ly_scm2string (gl);
- String orig = type_str;
- if (type_str == "|:")
- {
- type_str= ".|";
- }
- else if (type_str== ":|")
- {
- type_str= "|.";
- }
- else if (type_str== ":|:")
- {
- type_str= ".|.";
- }
- if (orig != type_str)
- set_elt_property ("glyph", ly_str02scm (type_str.ch_C()));
- }
+
+ String type = ly_scm2string (gl);
+ if (type == "|:")
+ {
+ type = ".|";
+ }
+ else if (type== ":|")
+ {
+ type = "|.";
+ }
+ else if (type== ":|:")
+ {
+ type = ".|.";
+ }
+
+ gl = ly_str02scm (type.ch_C ());
+ if (scm_equal_p (me->internal_get_grob_property (glyph_symbol), gl) != SCM_BOOL_T)
+ me->internal_set_grob_property (glyph_symbol, gl);
}
Interval
-Span_bar::get_spanned_interval () const
+Span_bar::get_spanned_interval (Grob*me)
{
- return Axis_group_interface::group_extent_callback (this, Y_AXIS);
+ return ly_scm2interval (Axis_group_interface::group_extent_callback (me->self_scm (), gh_int2scm (Y_AXIS)));
}
-Real
-Span_bar::get_bar_size () const
+MAKE_SCHEME_CALLBACK (Span_bar,get_bar_size,1);
+SCM
+Span_bar::get_bar_size (SCM smob)
{
- Interval iv (get_spanned_interval ());
+ Grob* me = unsmob_grob (smob);
+ Interval iv (get_spanned_interval (me));
if (iv.empty_b ())
{
- programming_error("Huh? My children deflated (FIXME)");
- iv = Interval (0,0);
+ /*
+ This happens if the bars are hara-kiried from under us.
+ */
+ me->suicide ();
+ return gh_double2scm (-1);
}
- return iv.length ();
+ return gh_double2scm (iv.length ());
}
-Span_bar::Span_bar (SCM s)
- : Bar (s)
+void
+Span_bar::set_interface (Grob *me)
{
- Pointer_group_interface(this).set_interface ();
- set_extent_callback (width_callback, X_AXIS);
+ Bar::set_interface (me);
- // dim_cache_[Y_AXIS]->set_extent_callback (Axis_group_interface::group_extent_callback);
-
- set_extent_callback (0, Y_AXIS);
+ me->set_interface (ly_symbol2scm ("span-bar-interface"));
+ me->set_extent_callback (SCM_EOL, Y_AXIS);
}
+bool
+Span_bar::has_interface (Grob*m)
+{
+ return m && m->has_interface (ly_symbol2scm ("span-bar-interface"));
+}
projects / lilypond.git / blobdiff