source file of the GNU LilyPond music typesetter
- (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "span-bar.hh"
-#include "lookup.hh"
+#include "font-interface.hh"
#include "dimensions.hh"
-#include "atom.hh"
#include "paper-def.hh"
-#include "molecule.hh"
-#include "align-element.hh"
+#include "stencil.hh"
+#include "warn.hh"
+#include "axis-group-interface.hh"
+#include "group-interface.hh"
+#include "grob.hh"
+#include "bar-line.hh"
void
-Span_bar::add_bar (Bar*b)
+Span_bar::add_bar (Grob*me, Grob*b)
{
- spanning_l_arr_.push (b);
- add_dependency (b);
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), b);
+
+ me->add_dependency (b);
}
-void
-Span_bar::do_substitute_dependency (Score_element*o, Score_element*n)
+MAKE_SCHEME_CALLBACK (Span_bar,print,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. */
+
+/* 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)
{
- spanning_l_arr_.unordered_substitute (o, n);
+ 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");
+
+ /* glyph may not be a string, when ME is killed by Hara Kiri in
+ between. */
+ if (!gh_string_p (glyph))
+ return SCM_EOL;
+
+ String glyph_string = ly_scm2string (glyph);
+
+ /* compose span_bar_mol */
+ Stencil 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.is_empty ())
+ continue;
+
+ if (!prev_extent.is_empty ())
+ {
+ Interval l (prev_extent [UP],
+ ext[DOWN]);
+
+ if (l.is_empty ())
+ {
+ /* There is overlap between the bar lines. Do nothing. */
+ }
+ else
+ {
+ Stencil interbar = Bar_line::compound_barline (staff_bar,
+ glyph_string,
+ l.length ());
+ interbar.translate_axis (l.center (), Y_AXIS);
+ span_bar_mol.add_stencil (interbar);
+ }
+ }
+ prev_extent = ext;
+ }
+
+ span_bar_mol.translate_axis (- me->relative_coordinate (refp, Y_AXIS),
+ Y_AXIS);
+
+ return span_bar_mol.smobbed_copy ();
}
-void
-Span_bar::set_align (Align_element *a)
+MAKE_SCHEME_CALLBACK (Span_bar,width_callback,2);
+SCM
+Span_bar::width_callback (SCM element_smob, SCM scm_axis)
{
- add_dependency (a);
+ 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.
+ */
+ Stencil m = Bar_line::compound_barline (se, gl, 40 PT);
+
+ return ly_interval2scm (m.extent (X_AXIS));
}
-Interval
-Span_bar::do_width () const
+MAKE_SCHEME_CALLBACK (Span_bar,before_line_breaking,1);
+SCM
+Span_bar::before_line_breaking (SCM smob)
{
- Molecule m = lookup_l ()->bar (type_str_, 40 PT);
-
- return m.extent (X_AXIS);
+ evaluate_empty (unsmob_grob (smob));
+ evaluate_glyph (unsmob_grob (smob));
+
+ /* No need to call Bar_line::before_line_breaking (), because the info
+ in ELEMENTS already has been procced by
+ Bar_line::before_line_breaking (). */
+ return SCM_UNSPECIFIED;
}
-void
-Span_bar::do_pre_processing ()
+MAKE_SCHEME_CALLBACK (Span_bar,center_on_spanned_callback,2);
+
+SCM
+Span_bar::center_on_spanned_callback (SCM element_smob, SCM axis)
{
- Bar::do_pre_processing ();
+ Grob *me = unsmob_grob (element_smob);
+ Axis a = (Axis) gh_scm2int (axis);
+ assert (a == Y_AXIS);
+ 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 gh_double2scm (0.0);
+ }
- evaluate_empty ();
+ return gh_double2scm (i.center ());
}
void
-Span_bar::do_post_processing ()
+Span_bar::evaluate_empty (Grob*me)
{
- Bar::do_post_processing ();
+ /* 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")))
+ {
+ me->suicide ();
+ }
}
void
-Span_bar::evaluate_empty ()
-{
- if (spanning_l_arr_.size () < 1)
+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))
{
- transparent_b_ = true;
- set_empty (true);
+ gl = unsmob_grob (gh_car (elts))
+ ->internal_get_grob_property (glyph_symbol);
+ if (gh_string_p (gl))
+ break;
+ elts =gh_cdr (elts);
}
- if (type_str_.empty_b ())
+
+ if (!gh_string_p (gl))
{
- transparent_b_=true;
- set_empty (true);
+ me->suicide ();
+ return;
}
- else if (type_str_ == "|:")
+
+ String type = ly_scm2string (gl);
+ if (type == "|:")
{
- type_str_ = ".|";
+ type = ".|";
}
- else if (type_str_ == ":|")
+ else if (type== ":|")
{
- type_str_ = "|.";
+ type = "|.";
}
- else if (type_str_ == ":|:")
+ else if (type== ":|:")
{
- type_str_ = ".|.";
+ type = ".|.";
}
+
+ gl = scm_makfrom0str (type.to_str0 ());
+ if (scm_equal_p (me->internal_get_grob_property (glyph_symbol), gl)
+ != SCM_BOOL_T)
+ me->internal_set_grob_property (glyph_symbol, gl);
}
-Molecule
-Span_bar::get_bar_sym (Real dy) const
+Interval
+Span_bar::get_spanned_interval (Grob*me)
{
- if (dy < paper ()->staffheight_f () / 2)
- return Atom ();
-
- return lookup_l ()->bar (type_str_, dy);
+ return ly_scm2interval (Axis_group_interface::group_extent_callback
+ (me->self_scm (), gh_int2scm (Y_AXIS)));
}
-Molecule*
-Span_bar::do_brew_molecule_p () const
+
+MAKE_SCHEME_CALLBACK (Span_bar,get_bar_size,1);
+SCM
+Span_bar::get_bar_size (SCM smob)
{
- Interval y_int;
- for (int i=0; i < spanning_l_arr_.size (); i++)
+ Grob* me = unsmob_grob (smob);
+ Interval iv (get_spanned_interval (me));
+ if (iv.is_empty ())
{
- Dimension_cache*common =
- common_group (spanning_l_arr_[i], Y_AXIS);
-
- Real y = spanning_l_arr_[i]->dim_cache_[Y_AXIS].relative_coordinate (common)
- -dim_cache_[Y_AXIS].relative_coordinate (common);
-
- y_int.unite (y + spanning_l_arr_[i]->extent(Y_AXIS));
+ /* This happens if the bars are hara-kiried from under us. */
+ me->suicide ();
+ return gh_double2scm (-1);
}
-
- Molecule*output = new Molecule (get_bar_sym (y_int.length ()));
- output->translate_axis (y_int.center (), Y_AXIS);
- return output;
+ return gh_double2scm (iv.length ());
}
-Span_bar::Span_bar ()
-{
- type_str_ = "";
-}
+ADD_INTERFACE (Span_bar,"span-bar-interface",
+ "A bar line that spans other barlines (typically used to get cross-staff barlines.",
+ "");
+
+
projects / lilypond.git / blobdiff