/*******************************************************************************
* Copyright (c) 2005, 2007 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.jsdt.internal.corext.refactoring.util;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import org.eclipse.wst.jsdt.core.dom.ASTNode;
import org.eclipse.wst.jsdt.core.dom.StructuralPropertyDescriptor;
import org.eclipse.wst.jsdt.core.dom.rewrite.TargetSourceRangeComputer;
public class TightSourceRangeComputer extends TargetSourceRangeComputer {
private HashSet/*<ASTNode>*/ fTightSourceRangeNodes= new HashSet();
public void addTightSourceNode(ASTNode reference) {
fTightSourceRangeNodes.add(reference);
List properties= reference.structuralPropertiesForType();
for (Iterator iterator= properties.iterator(); iterator.hasNext();) {
StructuralPropertyDescriptor descriptor= (StructuralPropertyDescriptor)iterator.next();
if (descriptor.isChildProperty()) {
ASTNode child= (ASTNode)reference.getStructuralProperty(descriptor);
if (isExtending(child, reference)) {
addTightSourceNode(child);
}
} else if (descriptor.isChildListProperty()) {
List childs= (List)reference.getStructuralProperty(descriptor);
for (Iterator iterator2= childs.iterator(); iterator2.hasNext();) {
ASTNode child= (ASTNode)iterator2.next();
if (isExtending(child, reference)) {
addTightSourceNode(child);
}
}
}
}
}
public SourceRange computeSourceRange(ASTNode node) {
if (fTightSourceRangeNodes.contains(node)) {
return new TargetSourceRangeComputer.SourceRange(node.getStartPosition(), node.getLength());
} else {
return super.computeSourceRange(node); // see bug 85850
}
}
private boolean isExtending(ASTNode child, ASTNode parent) {
SourceRange extendedRange= super.computeSourceRange(child);
int parentStart= parent.getStartPosition();
int extendedStart= extendedRange.getStartPosition();
if (parentStart > extendedStart)
return true;
int parentEnd= parentStart + parent.getLength();
int extendedEnd= extendedStart + extendedRange.getLength();
if (parentEnd < extendedEnd)
return true;
return false;
}
}