bundles/org.eclipse.wst.jsdt.web.core/src/org/eclipse/wst/jsdt/web/core/internal/java/jspel/FindFunctionInvocationVisitor.java

/*******************************************************************************
 * Copyright (c) 2005 BEA Systems 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:
 *     BEA Systems - initial implementation
 *     
 *******************************************************************************/
package org.eclipse.wst.jsdt.web.core.internal.java.jspel;

public class FindFunctionInvocationVisitor implements JSPELParserVisitor {
	protected int fCursorPosition;

	public FindFunctionInvocationVisitor(int cursorPosition) {
		fCursorPosition = cursorPosition;
	}

	protected boolean isEnclosing(SimpleNode node) {
		return (node.firstToken.beginColumn < fCursorPosition && node.lastToken.endColumn >= fCursorPosition);
	}

	protected Object visitEnclosingChild(SimpleNode node, Object data) {
		if (null == node.children) {
			return null;
		}

		for (int i = 0; i < node.children.length; i++) {
			if (isEnclosing(node)) {
				return node.children[i].jjtAccept(this, data);
			}
		}
		return null;
	}

	public Object visit(SimpleNode node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTExpression node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTOrExpression node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTAndExpression node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTEqualityExpression node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTRelationalExpression node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTAddExpression node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTMultiplyExpression node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTChoiceExpression node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTUnaryExpression node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTValue node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTValuePrefix node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTValueSuffix node, Object data) {
		return visitEnclosingChild(node, data);
	}

	public Object visit(ASTFunctionInvocation node, Object data) {
		Object nestedInvocation = visitEnclosingChild(node, data);
		if (null != nestedInvocation) {
			return nestedInvocation;
		}
		return node;
	}

	public Object visit(ASTLiteral node, Object data) {
		return visitEnclosingChild(node, data);
	}
}