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/*******************************************************************************
* Copyright (c) 2006, 2008 Wind River Systems, Inc. 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:
* Markus Schorn - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.ui.callhierarchy;
import java.util.ArrayList;
import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTDeclaration;
import org.eclipse.cdt.core.dom.ast.IASTFileLocation;
import org.eclipse.cdt.core.dom.ast.IASTName;
/**
* Visitor to find references in a given range of the source code.
* @since 4.0
*/
class ReferenceVisitor extends ASTVisitor {
private ArrayList<IASTName> fReferences= new ArrayList<IASTName>();
private int fOffset;
private int fEndOffset;
private String fFileName;
ReferenceVisitor(String fileName, int offset, int length) {
shouldVisitNames= true;
shouldVisitDeclarations= true;
fFileName= fileName;
fOffset= offset;
fEndOffset= offset+length;
}
public IASTName[] getReferences() {
return fReferences.toArray(new IASTName[fReferences.size()]);
}
@Override
public int visit(IASTName name) {
if (name.isReference()) {
IASTFileLocation loc= name.getFileLocation();
if (!loc.getFileName().equals(fFileName)) {
return PROCESS_SKIP;
}
int offset= loc.getNodeOffset();
if (fOffset <= offset && offset+loc.getNodeLength() <= fEndOffset) {
fReferences.add(name);
}
}
return super.visit(name);
}
@Override
public int visit(IASTDeclaration declaration) {
IASTFileLocation loc= declaration.getFileLocation();
if (loc != null) {
if (!loc.getFileName().equals(fFileName)) {
return PROCESS_SKIP;
}
int offset= loc.getNodeOffset();
if (offset + loc.getNodeLength() <= fOffset || fEndOffset <= offset) {
return PROCESS_SKIP;
}
}
return PROCESS_CONTINUE;
}
}
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