/*******************************************************************************
* Copyright (c) 2008, 2009 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.core.dom.parser;
import org.eclipse.cdt.core.dom.ast.ASTGenericVisitor;
import org.eclipse.cdt.core.dom.ast.IASTDeclaration;
import org.eclipse.cdt.core.dom.ast.IASTDeclarator;
import org.eclipse.cdt.core.dom.ast.IASTImplicitName;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTPointerOperator;
/**
* Visitor to search for nodes by file offsets.
* @since 5.0
*/
public class FindNodeForOffsetAction extends ASTGenericVisitor {
private final ASTNodeSpecification<?> fNodeSpec;
public FindNodeForOffsetAction(ASTNodeSpecification<?> nodeSpec) {
super(!nodeSpec.requiresClass(IASTName.class));
fNodeSpec= nodeSpec;
shouldVisitNames = true;
shouldVisitDeclarations= true;
includeInactiveNodes= true;
// only visit implicit names if asked
shouldVisitImplicitNames =
shouldVisitImplicitNameAlternates = nodeSpec.requiresClass(IASTImplicitName.class);
}
@Override
public int genericVisit(IASTNode node) {
if (node instanceof ASTNode) {
final ASTNode astNode = (ASTNode) node;
if (!fNodeSpec.canContainMatches(astNode)) {
return PROCESS_SKIP;
}
fNodeSpec.visit(astNode);
}
return PROCESS_CONTINUE;
}
@Override
public int visit(IASTDeclaration declaration) {
// use declarations to determine if the search has gone past the
// offset (i.e. don't know the order the visitor visits the nodes)
if (declaration instanceof ASTNode && ((ASTNode) declaration).getOffset() > fNodeSpec.getSequenceEnd())
return PROCESS_ABORT;
return genericVisit(declaration);
}
@Override
public int visit(IASTDeclarator declarator) {
int ret = genericVisit(declarator);
IASTPointerOperator[] ops = declarator.getPointerOperators();
for (int i = 0; i < ops.length; i++)
genericVisit(ops[i]);
return ret;
}
}