add sources

app/main/models/source_model.rb

@@ -0,0 +1,23 @@
+class SourceModel < Volt::ArrayModel
+
+  def instruction_changed old , ins
+    return unless ins
+    source = source_text ins.source
+    if( self.length > 0)
+      return if self.last._name == source
+      self.last._class_name = "inactive"
+    end
+    self << { :name => source.to_s , :class_name => "bright" }
+    #puts "sources #{self.length}"
+    self.delete_at(0) if( self.length > 5)
+  end
+
+  def source_text source
+    if source.is_a? Virtual::Instruction
+      return source.class.name
+    else
+      return "Method: #{source.name}"
+    end
+  end
+
+end