-#include "base-span-bar-engraver.hh"
+/*
+ span-bar-grav.cc -- implement Span_bar_engraver
+ source file of the GNU LilyPond music typesetter
-class Span_bar_engraver : public Base_span_bar_engraver
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+
+
+#include "lily-guile.hh"
+#include "bar-line.hh"
+#include "item.hh"
+#include "span-bar.hh"
+#include "engraver.hh"
+
+
+/**
+
+ Make bars that span multiple "staves". Catch bars, and span a
+ Span_bar over them if we find more than 2 bars. Vertical alignment
+ of staves changes the appearance of spanbars. It is up to the
+ aligner (Vertical_align_engraver, in this case, to add extra
+ dependencies to the spanbars.
+
+ */
+class Span_bar_engraver : public Engraver
{
-protected:
- Span_bar *get_span_bar_p ();
+ Item * spanbar_;
+ Link_array<Item> bars_;
+
public:
- Span_bar_engraver ();
- VIRTUAL_COPY_CONS (Translator);
+ TRANSLATOR_DECLARATIONS(Span_bar_engraver);
+protected:
+ virtual void acknowledge_grob (Grob_info);
+ virtual void stop_translation_timestep ();
+
};
Span_bar_engraver::Span_bar_engraver ()
{
- use_priority_b_ = false;
+ spanbar_ =0;
+}
+
+
+
+void
+Span_bar_engraver::acknowledge_grob (Grob_info i)
+{
+ int depth = i.origin_transes (this).size ();
+ if (depth > 1
+ && Bar_line::has_interface (i.grob_))
+ {
+ Item * it = dynamic_cast<Item*> (i.grob_);
+ bars_.push (it);
+
+ if (bars_.size () >= 2 && !spanbar_)
+ {
+ spanbar_ = make_item ("SpanBar");
+
+ spanbar_->set_parent (bars_[0], X_AXIS);
+
+ announce_grob (spanbar_, SCM_EOL);
+ }
+ }
+}
+void
+Span_bar_engraver::stop_translation_timestep ()
+{
+ if (spanbar_)
+ {
+ for (int i=0; i < bars_.size () ; i++)
+ Span_bar::add_bar (spanbar_,bars_[i]);
+
+ SCM vissym =ly_symbol2scm ("break-visibility");
+ SCM vis = bars_[0]->internal_get_grob_property (vissym);
+ if (scm_equal_p (spanbar_->internal_get_grob_property (vissym), vis) != SCM_BOOL_T)
+ spanbar_->internal_set_grob_property (vissym, vis);
+
+ typeset_grob (spanbar_);
+ spanbar_ =0;
+ }
+ bars_.set_size (0);
}
-ADD_THIS_TRANSLATOR(Span_bar_engraver);
+
+
+
+
+
+
+ENTER_DESCRIPTION(Span_bar_engraver,
+/* descr */ "This engraver makes cross-staff barlines: It catches all normal "
+"bar lines, and draws a single span-bar across them.",
+/* creats*/ "SpanBar",
+/* accepts */ "",
+/* acks */ "bar-line-interface",
+/* reads */ "",
+/* write */ "");