diff -r ce1f4383ef4d -r e1480829e5db gui/PPExtractProdcutionRefactoring.st
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gui/PPExtractProdcutionRefactoring.st	Tue Mar 04 22:15:33 2014 +0100
@@ -0,0 +1,72 @@
+"{ Package: 'stx:goodies/petitparser/gui' }"
+
+ExtractMethodRefactoring subclass:#PPExtractProdcutionRefactoring
+	instanceVariableNames:'targetProduction'
+	classVariableNames:''
+	poolDictionaries:''
+	category:'PetitGui-Refactoring'
+!
+
+
+!PPExtractProdcutionRefactoring class methodsFor:'instance creation'!
+
+onClass: aClass production: aSelector interval: anInterval to: aTargetSelector
+	^ (self extract: anInterval from: aSelector in: aClass)
+		setTargetProduction: aTargetSelector;
+		yourself
+! !
+
+!PPExtractProdcutionRefactoring methodsFor:'initialization'!
+
+setTargetProduction: aSymbol
+	targetProduction := aSymbol
+! !
+
+!PPExtractProdcutionRefactoring methodsFor:'preconditions'!
+
+preconditions
+	^ (self checkCompositeParser: class)
+		& super preconditions		
+		& (RBCondition definesSelector: targetProduction asSymbol in: class) not
+		& (RBCondition definesInstanceVariable: targetProduction asString in: class) not
+! !
+
+!PPExtractProdcutionRefactoring methodsFor:'requests'!
+
+shouldExtractAssignmentTo: aString
+	^ false
+! !
+
+!PPExtractProdcutionRefactoring methodsFor:'transforming'!
+
+existingSelector
+	^ nil
+!
+
+getNewMethodName
+	parameters isEmpty
+		ifFalse: [ self refactoringError: 'Cannot extract production since it contains references.' ].
+	targetProduction asSymbol isUnary
+		ifFalse: [ self refactoringError: 'Invalid production name.' ].
+	^ targetProduction asSymbol
+!
+
+nameNewMethod: aSymbol 
+	class addInstanceVariable: aSymbol asString.
+	extractedParseTree renameSelector: aSymbol andArguments: #().
+	modifiedParseTree := RBParseTreeRewriter 
+		replace: self methodDelimiter
+		with: aSymbol asString
+		in: modifiedParseTree
+! !
+
+!PPExtractProdcutionRefactoring class methodsFor:'documentation'!
+
+version
+    ^ '$Header: /cvs/stx/stx/goodies/petitparser/gui/PPExtractProdcutionRefactoring.st,v 1.1 2014-03-04 21:15:33 cg Exp $'
+!
+
+version_CVS
+    ^ '$Header: /cvs/stx/stx/goodies/petitparser/gui/PPExtractProdcutionRefactoring.st,v 1.1 2014-03-04 21:15:33 cg Exp $'
+! !
+