Committed current version of visitor refactoring

git-svn-id: http://svn.clifford.at/openscad/trunk@571 b57f626f-c46c-0410-a088-ec61d464b74c

1 files changed, 40 insertions, 0 deletions

diff --git a/src/traverser.cc b/src/traverser.cc
new file mode 100644
index 0000000..af29132
--- /dev/null
+++ b/src/traverser.cc
@@ -0,0 +1,40 @@
+#include "traverser.h"
+#include "visitor.h"
+#include "node.h"
+#include "state.h"
+
+void Traverser::execute() 
+{
+	State state(NULL);
+	traverse(state, this->root);
+}
+
+void Traverser::traverse(const State &state, const AbstractNode &node)
+{
+	// FIXME: Handle abort
+	
+	State newstate = state;
+	newstate.setNumChildren(node.getChildren().size());
+	
+	if (traversaltype == PREFIX || traversaltype == PRE_AND_POSTFIX) {
+		newstate.setPrefix(true);
+		newstate.setParent(state.parent());
+		node.accept(newstate, this->visitor);
+	}
+	
+	newstate.setParent(&node);
+	const std::list<AbstractNode*> &children = node.getChildren();
+	for (std::list<AbstractNode*>::const_iterator iter = children.begin();
+			 iter != children.end();
+			 iter++) {
+		
+		traverse(newstate, **iter);
+	}
+	
+	if (traversaltype == POSTFIX || traversaltype == PRE_AND_POSTFIX) {
+		newstate.setParent(state.parent());
+		newstate.setPrefix(false);
+		newstate.setPostfix(true);
+		node.accept(newstate, this->visitor);
+	}
+}