source file of the GNU LilyPond music typesetter
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "span-bar.hh"
-#include "lookup.hh"
+
+#include "font-interface.hh"
#include "dimensions.hh"
-#include "paper-def.hh"
-#include "molecule.hh"
-#include "align-element.hh"
+#include "output-def.hh"
+#include "stencil.hh"
#include "warn.hh"
+#include "axis-group-interface.hh"
+#include "bar-line.hh"
void
-Span_bar::add_bar (Score_element*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_element_pointer (Score_element*o, Score_element*n)
+MAKE_SCHEME_CALLBACK (Span_bar, print, 1);
+
+/* Limitations/Bugs:
+
+(1) Elements from 'me->get_property ("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)
{
- spanning_l_arr_.unordered_substitute (o, n);
+ Grob *me = unsmob_grob (smobbed_me);
+ SCM elements = me->get_property ("elements");
+
+ Grob *refp = common_refpoint_of_list (elements, me, Y_AXIS);
+ Span_bar::evaluate_glyph (me);
+ SCM glyph = me->get_property ("glyph");
+
+ /* 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 */
+ Array<Interval> extents;
+ Grob *model_bar = 0;
+ for (SCM elts = elements; scm_is_pair (elts); elts = scm_cdr (elts))
+ {
+ Grob *bar = unsmob_grob (scm_car (elts));
+ Interval ext = bar->extent (refp, Y_AXIS);
+ if (ext.is_empty ())
+ continue;
+
+ extents.push (ext);
+ model_bar = bar;
+ }
+
+ if (!model_bar)
+ model_bar = me;
+
+ extents.sort (&Interval::left_comparison);
+
+ Stencil span_bar;
+ for (int 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 ())
+ {
+ /* 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;
+ }
+
+ span_bar.translate_axis (- me->relative_coordinate (refp, Y_AXIS),
+ Y_AXIS);
+
+ return span_bar.smobbed_copy ();
}
+MAKE_SCHEME_CALLBACK (Span_bar, width_callback, 2);
+SCM
+Span_bar::width_callback (SCM element_smob, SCM scm_axis)
+{
+ Grob *se = unsmob_grob (element_smob);
+ (void) scm_axis;
-Interval
-Span_bar::do_width () const
+ assert ( (Axis) scm_to_int (scm_axis) == X_AXIS);
+ String gl = ly_scm2string (se->get_property ("glyph"));
+
+ /*
+ urg.
+ */
+ Stencil m = Bar_line::compound_barline (se, gl, 40 PT, false);
+
+ return ly_interval2scm (m.extent (X_AXIS));
+}
+
+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, paper_l ());
-
- return m.extent (X_AXIS);
+ Grob *g = unsmob_grob (smob);
+ evaluate_empty (g);
+ evaluate_glyph (g);
+
+ /* 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 ();
-
- evaluate_empty ();
-
- dim_cache_[Y_AXIS]->set_empty (false); // a hack to make mark scripts work.
+ Grob *me = unsmob_grob (element_smob);
+ (void) axis;
+ assert (scm_to_int (axis) == 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 scm_make_real (0.0);
+ }
+
+ return scm_make_real (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 (!scm_is_pair (me->get_property ("elements")))
+ {
+ me->suicide ();
+ }
}
void
-Span_bar::evaluate_empty ()
-{
- if (spanning_l_arr_.size () < 1)
+Span_bar::evaluate_glyph (Grob *me)
+{
+ SCM gl = me->get_property ("glyph");
+
+ if (scm_is_string (gl))
+ return;
+
+ for (SCM s = me->get_property ("elements");
+ !scm_is_string (gl) && scm_is_pair (s); s = scm_cdr (s))
{
- set_elt_property (transparent_scm_sym, SCM_BOOL_T);
- set_empty (true);
+ gl = unsmob_grob (scm_car (s))
+ ->get_property ("glyph");
}
- if (type_str_.empty_b ())
+
+ if (!scm_is_string (gl))
{
- set_elt_property (transparent_scm_sym, SCM_BOOL_T);
- 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 = ".|.";
}
-}
-
-Interval
-Span_bar::get_spanned_interval () const
-{
- Interval y_int;
- for (int i=0; i < spanning_l_arr_.size (); i++)
- {
- 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));
- }
- return y_int;
+ gl = scm_makfrom0str (type.to_str0 ());
+ if (scm_equal_p (me->get_property ("glyph"), gl)
+ != SCM_BOOL_T)
+ me->set_property ("glyph", gl);
}
Interval
-Span_bar::do_height () const
+Span_bar::get_spanned_interval (Grob *me)
{
- return get_spanned_interval ();
+ return ly_scm2interval (Axis_group_interface::group_extent_callback
+ (me->self_scm (), scm_int2num (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 iv (get_spanned_interval ());
- Molecule*output = new Molecule;
- if (!iv.empty_b())
- {
- output->add_molecule (lookup_l ()->bar (type_str_, iv.length (), paper_l ()));
- output->translate_axis (iv.center (), Y_AXIS);
- }
- else
+ Grob *me = unsmob_grob (smob);
+ Interval iv (get_spanned_interval (me));
+ if (iv.is_empty ())
{
- programming_error("Huh? My children deflated (FIXME)");
+ /* This happens if the bars are hara-kiried from under us. */
+ me->suicide ();
+ return scm_make_real (-1);
}
- return output;
+ return scm_make_real (iv.length ());
}
+ADD_INTERFACE (Span_bar, "span-bar-interface",
+ "A bar line that spanned between other barlines. This interface is "
+ " used for bar lines that connect different staves.",
+ "elements");
-
-Span_bar::Span_bar ()
-{
- type_str_ = "";
-}