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/*******************************************************************************
* Copyright (c) 2004 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.css.core.internal.util;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSImportRule;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSMediaRule;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSNode;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSSelector;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSSelectorItem;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSSelectorList;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSSimpleSelector;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSStyleRule;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSStyleSheet;
/**
*
*/
public class CSSClassTraverser extends AbstractCssTraverser {
ArrayList fClassNames;
/**
*
*/
public CSSClassTraverser() {
super();
}
/**
*
*/
private void addClassNames(ICSSStyleRule rule) {
ICSSSelectorList selectorList = rule.getSelectors();
Iterator iSelector = selectorList.getIterator();
while (iSelector.hasNext()) {
ICSSSelector selector = (ICSSSelector) iSelector.next();
Iterator iItem = selector.getIterator();
while (iItem.hasNext()) {
ICSSSelectorItem item = (ICSSSelectorItem) iItem.next();
if (item.getItemType() == ICSSSelectorItem.SIMPLE) {
ICSSSimpleSelector sel = (ICSSSimpleSelector) item;
int nClasses = sel.getNumOfClasses();
for (int iClass = 0; iClass < nClasses; iClass++) {
String className = sel.getClass(iClass);
if (!fClassNames.contains(className))
fClassNames.add(className);
}
}
}
}
}
/**
*
*/
protected void begin(ICSSNode node) {
if (fClassNames == null)
fClassNames = new ArrayList();
}
/**
*
*/
protected void end(ICSSNode node) {
}
/**
*
*/
public Collection getClassNames() {
return (fClassNames != null) ? fClassNames : Collections.EMPTY_LIST;
}
/**
*
*/
protected short postNode(ICSSNode node) {
return TRAV_CONT;
}
/**
*
*/
protected short preNode(ICSSNode node) {
short ret;
if (node instanceof ICSSStyleRule) {
addClassNames((ICSSStyleRule) node);
ret = TRAV_PRUNE;
}
else if (node instanceof ICSSStyleSheet || node instanceof ICSSMediaRule || node instanceof ICSSImportRule) {
ret = TRAV_CONT;
}
else {
ret = TRAV_PRUNE;
}
return ret;
}
}
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