patch::: 1.3.121.jcn2

[lilypond.git] / lily / span-bar-engraver.cc

diff --git a/lily/span-bar-engraver.cc b/lily/span-bar-engraver.cc
index 135d978c15864841a09858bdaa4441a38485d1fa..7674d05dc11cea0df5d39e507d90938cdb309742 100644 (file)
--- a/lily/span-bar-engraver.cc
+++ b/lily/span-bar-engraver.cc
@@ -1,17 +1,94 @@
-#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--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+
+
+#include "lily-guile.hh"
+#include "bar.hh"
+#include "item.hh"
+#include "span-bar.hh"
+#include "engraver.hh"
+
+
+/** 
+
+  Make bars that span multiple "staffs". Catch bars, and span a
+  Span_bar over them if we find more than 2 bars.  Vertical alignment
+  of staffs 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
 {
+  Item * spanbar_p_;
+  Link_array<Item> bar_l_arr_;
+
 public:
-  Span_bar_engraver ();
-  VIRTUAL_COPY_CONS (Translator);
+  VIRTUAL_COPY_CONS(Translator);
+  Span_bar_engraver();
+protected:
+  virtual void acknowledge_grob (Grob_info);
+  virtual void stop_translation_timestep();
+
 };
 
 
-Span_bar_engraver::Span_bar_engraver ()
+Span_bar_engraver::Span_bar_engraver()
+{
+  spanbar_p_ =0;
+}
+
+
+
+void
+Span_bar_engraver::acknowledge_grob (Grob_info i)
+{
+  int depth = i.origin_trans_l_arr (this).size();
+  if (depth > 1
+      && Bar::has_interface (i.elem_l_))
+    {
+      Item * it = dynamic_cast<Item*>(i.elem_l_);
+      bar_l_arr_.push (it);
+
+      if (bar_l_arr_.size() >= 2 && !spanbar_p_) 
+       {
+         spanbar_p_ = new Item (get_property ("SpanBar"));
+         Span_bar::set_interface (spanbar_p_);
+               
+         spanbar_p_->set_parent (bar_l_arr_[0], Y_AXIS);
+         spanbar_p_->set_parent (bar_l_arr_[0], X_AXIS);
+
+         announce_grob (spanbar_p_,0);
+       }
+    }
+}
+void
+Span_bar_engraver::stop_translation_timestep()
 {
-  use_priority_b_ = false;
+  if (spanbar_p_) 
+    {
+      for (int i=0; i < bar_l_arr_.size() ; i++)
+       Span_bar::add_bar( spanbar_p_,bar_l_arr_[i]);
+
+      SCM vissym =ly_symbol2scm ("visibility-lambda");
+      SCM vis = bar_l_arr_[0]->get_grob_property (vissym);       
+      if (scm_equal_p (spanbar_p_->get_grob_property (vissym), vis) != SCM_BOOL_T)
+       spanbar_p_->set_grob_property (vissym, vis);
+
+      typeset_grob (spanbar_p_);
+      spanbar_p_ =0;
+    }
+  bar_l_arr_.set_size (0);
 }
 
+
+
 ADD_THIS_TRANSLATOR(Span_bar_engraver);
+
+
+