1 files changed, 106 insertions, 0 deletions
diff --git a/src/simplewalker.cc b/src/simplewalker.cc
new file mode 100644
index 0000000000..ad9019ac33
--- /dev/null
+++ b/src/simplewalker.cc
@@ -0,0 +1,106 @@
+#include "request.hh"
+#include "beam.hh"
+#include "pscore.hh"
+#include "simplestaff.hh"
+#include "sccol.hh"
+#include "stem.hh"
+#include "notehead.hh"
+#include "rest.hh"
+#include "debug.hh"
+
+void
+Simple_walker::process_command(Command*com)
+{
+    switch (com->code){
+    case BREAK_PRE:
+    case BREAK_MIDDLE:
+    case BREAK_POST:
+    case BREAK_END:
+	(*this)->score_column->set_breakable();
+	break_status = com->code- BREAK_PRE;
+	break;
+    case INTERPRET:
+	break;
+	
+    case TYPESET:
+    {
+	Item* i = staff()->get_TYPESET_item(com);	
+	col()->typeset_item(i, break_status);
+    }
+	break;
+   
+    default :
+	break;
+    }	
+}
+
+void
+Simple_walker::process_requests()
+{
+    Simple_column*c = col();
+    Simple_staff *s = staff();
+    if (c->beam_&& c->beam_->spantype == Span_req::START) {
+	if (beam_)
+	    error("Too many beams");
+	beam_ = new Beam;
+    }
+    
+    if (c->stem_) {
+	stem_ = s->get_stem(c->stem_->stem());
+	c->typeset_item(stem_);
+    }
+    
+    for (int i = 0; i <  c->notes.sz(); i ++)  {
+	Rhythmic_req*rq = c->notes[i];
+	if (rq->note()) {
+	    Notehead*n = s->get_notehead(rq->note());
+	    stem_->add(n);
+	    noteheads.add(n);
+	}
+	
+	if (rq->rest()) {
+	    c->typeset_item( s->get_rest(rq->rest()) );
+	}
+    }
+    
+    
+    if (beam_) {
+	beam_->add(stem_);
+    }
+    
+    if (c->beam_&& c->beam_->spantype == Span_req::STOP) {
+	pscore_->typeset_spanner(beam_, s->theline);
+	beam_ = 0;
+    }
+    for (int i = 0; i < noteheads.sz(); i++) {
+	c->typeset_item(noteheads[i]);
+    }
+    noteheads.set_size(0);
+
+    if (stem_) {
+	stem_ = 0;
+    }
+}
+
+Simple_walker::Simple_walker(Simple_staff*s)
+    : Staff_walker(s, s->theline->pscore_)
+{
+    stem_ = 0;
+    beam_ =0;
+}
+
+
+
+Simple_staff*
+Simple_walker::staff()
+{
+    return (Simple_staff*) staff_;
+}
+
+Simple_column*
+Simple_walker::col()
+{
+    return (Simple_column*) *(*this);
+}
+
+