/*******************************************************************************
* Copyright (c) 2004, 2009 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.html.core.internal.htmlcss;
import org.eclipse.wst.css.core.internal.provisional.adapters.IStyleSelectorAdapter;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSSimpleSelector;
import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
import org.w3c.dom.Element;
import com.ibm.icu.util.StringTokenizer;
/**
* Insert the type's description here.
*/
public class HTMLStyleSelectorAdapter implements IStyleSelectorAdapter {
static private HTMLStyleSelectorAdapter instance;
private Object toMatch = IStyleSelectorAdapter.class;
public synchronized static HTMLStyleSelectorAdapter getInstance() {
if (instance == null) {
instance = new HTMLStyleSelectorAdapter();
}
return instance;
}
public boolean isAdapterForType(Object type) {
return type == toMatch;
}
public boolean match(ICSSSimpleSelector selector, Element element, String pseudoName) {
if (element == null)
return false;
int i;
String key;
// PseudoName
i = selector.getNumOfPseudoNames();
if (i > 0) {
if (pseudoName == null || pseudoName.length() == 0)
return false;
for (i = i - 1; i >= 0; i--) {
if (pseudoName.equalsIgnoreCase(selector.getPseudoName(i))) {
break;
}
}
if (i < 0)
return false;
}
// check tag name
if (!selector.isUniversal() && !element.getNodeName().equalsIgnoreCase(selector.getName()))
return false;
// check id
i = selector.getNumOfIDs();
if (i > 0) {
if (i > 1)
return false;
if (!element.hasAttribute("id") || (key = element.getAttribute("id")).length() == 0)//$NON-NLS-1$ //$NON-NLS-2$
return false;
if (!selector.getID(0).equals(key))
return false;
}
// check class
i = selector.getNumOfClasses();
if (i > 0) {
if (!element.hasAttribute("class") || (key = element.getAttribute("class")).length() == 0) //$NON-NLS-1$ //$NON-NLS-2$
return false;
StringTokenizer tokenizer = new StringTokenizer(key);
for (i = i - 1; i >= 0; i--) {
boolean ok = false;
while (tokenizer.hasMoreTokens()) {
if (selector.getClass(i).equals(tokenizer.nextToken())) {
ok = true;
break;
}
}
if (!ok)
return false;
}
}
// check attributes
for (i = selector.getNumOfAttributes() - 1; i >= 0; i--) {
StringTokenizer tokenizer = new StringTokenizer(selector.getAttribute(i), "=~| \t\r\n\f");//$NON-NLS-1$
int countTokens = tokenizer.countTokens();
if (countTokens > 0) {
String attrName = tokenizer.nextToken();
String attrValue = null;
if (!element.hasAttribute(attrName) || (attrValue = element.getAttribute(attrName)).length() == 0)
return false;
if (countTokens > 1) {
String token = tokenizer.nextToken("= \t\r\n\f");//$NON-NLS-1$
StringTokenizer attrValueTokenizer = null;
if (token.equals("~")) {//$NON-NLS-1$
attrValueTokenizer = new StringTokenizer(attrValue);
}
else if (token.equals("|")) {//$NON-NLS-1$
attrValueTokenizer = new StringTokenizer(attrValue, "-");//$NON-NLS-1$
}
if (attrValueTokenizer != null) {
if (tokenizer.hasMoreTokens()) {
token = tokenizer.nextToken();
boolean ok = false;
while (attrValueTokenizer.hasMoreTokens()) {
if (token.equals(attrValueTokenizer.nextToken())) {
ok = true;
break;
}
}
if (!ok)
return false;
}
}
else {
if (!attrValue.equals(token))
return false;
}
}
}
}
return true;
}
public void notifyChanged(INodeNotifier notifier, int eventType, Object changedFeature, Object oldValue, Object newValue, int pos) {
}
}