SmallSense__SmalltalkParseNodeFinder.st
changeset 101 a300290bf8fc
parent 98 c21c3e61a377
child 104 3b05b2d777dd
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SmallSense__SmalltalkParseNodeFinder.st	Tue Sep 24 02:14:28 2013 +0100
@@ -0,0 +1,81 @@
+"{ Package: 'jv:smallsense' }"
+
+"{ NameSpace: SmallSense }"
+
+SmalltalkParseNodeVisitor subclass:#SmalltalkParseNodeFinder
+	instanceVariableNames:'position match previous'
+	classVariableNames:''
+	poolDictionaries:''
+	category:'SmallSense-Smalltalk'
+!
+
+
+!SmalltalkParseNodeFinder methodsFor:'finding'!
+
+findNodeIn: source tree: tree line: line column: col
+
+    | sourceS |
+    sourceS := source readStream.
+    line - 1 timesRepeat:[
+        (sourceS nextLine) isNil ifTrue:[
+            "No such line"                                
+            ^nil
+        ].        
+    ].
+    ^self findNodeIn: source tree: tree position: sourceS position + col
+
+    "Created: / 26-11-2011 / 15:33:33 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+!
+
+findNodeIn: source tree: tree position: pos
+
+    position := pos - 1.
+    self visit: tree.
+    ^Position node: match ? previous position: pos.
+
+    "Created: / 26-11-2011 / 15:37:16 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+! !
+
+!SmalltalkParseNodeFinder methodsFor:'visiting'!
+
+visit:anObject 
+
+    anObject isNil ifTrue:[^self].
+
+    (anObject endPosition notNil and:[position > anObject endPosition]) ifTrue:[
+        previous := anObject.
+        anObject acceptVisitor: self.
+        ^self.
+    ].
+
+    (anObject startPosition notNil 
+        and:[anObject endPosition notNil 
+        and:[position between: anObject startPosition and: anObject endPosition]]) ifTrue:[
+        match := anObject.
+    ].
+    anObject acceptVisitor: self.
+
+    "Created: / 26-11-2011 / 15:40:07 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+    "Modified: / 19-09-2013 / 11:15:21 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+!
+
+visitStatementNode:anObject 
+
+    self visit: anObject expression.
+    self visit: anObject nextStatement.
+
+    "Modified: / 25-07-2011 / 22:34:44 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+    "Created: / 26-11-2011 / 15:40:32 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+! !
+
+!SmalltalkParseNodeFinder class methodsFor:'documentation'!
+
+version_HG
+
+    ^ '$Changeset: <not expanded> $'
+!
+
+version_SVN
+    ^ '$Id: SmallSenseFinder.st 7823 2011-11-26 16:55:59Z vranyj1 $'
+! !
+