| /******************************************************************************* |
| * 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.html.core.internal.validate; |
| |
| import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion; |
| import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion; |
| import org.eclipse.wst.xml.core.internal.contentmodel.CMAttributeDeclaration; |
| import org.eclipse.wst.xml.core.internal.contentmodel.CMElementDeclaration; |
| import org.eclipse.wst.xml.core.internal.contentmodel.CMNamedNodeMap; |
| import org.eclipse.wst.xml.core.internal.provisional.document.IDOMAttr; |
| import org.eclipse.wst.xml.core.internal.provisional.document.IDOMElement; |
| import org.w3c.dom.Attr; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.NamedNodeMap; |
| import org.w3c.dom.Node; |
| |
| public class NamespaceValidator extends PrimeValidator implements ErrorState { |
| |
| private final static String XMLNS_PREFIX = "xmlns";//$NON-NLS-1$ |
| private final static String NS_SEPARATOR = ":";//$NON-NLS-1$ |
| |
| public NamespaceValidator() { |
| super(); |
| } |
| |
| public boolean isAdapterForType(Object type) { |
| return ((type == NamespaceValidator.class) || super.isAdapterForType(type)); |
| } |
| |
| public void validate(IndexedRegion node) { |
| Element target = (Element) node; |
| if (isXMLElement(target) && hasUnknownPrefix(target)) { |
| IDOMElement e = (IDOMElement) target; |
| if (!isValidPrefix(e.getPrefix(), target) && !e.isCommentTag()) { |
| // report unknown tag error. |
| Segment errorSeg = FMUtil.getSegment(e, FMUtil.SEG_START_TAG); |
| if (errorSeg != null) |
| reporter.report(MessageFactory.createMessage(new ErrorInfoImpl(UNDEFINED_NAME_ERROR, errorSeg, e))); |
| } |
| } |
| // (2) check prefix of each attr |
| NamedNodeMap attrs = target.getAttributes(); |
| for (int i = 0; i < attrs.getLength(); i++) { |
| Node n = attrs.item(i); |
| if (!(n instanceof IDOMAttr)) |
| continue; |
| IDOMAttr a = (IDOMAttr) n; |
| String prefix = a.getPrefix(); |
| if ((prefix != null) && isUnknownAttr(a, target)) { |
| // The attr has unknown prefix. So, check it. |
| if (!isValidPrefix(prefix, target)) { |
| // report unknown attr error. |
| ITextRegion r = a.getNameRegion(); |
| if (r == null) |
| continue; |
| int a_offset = a.getNameRegionStartOffset(); |
| int a_length = a.getNameRegion().getLength(); |
| reporter.report(MessageFactory.createMessage(new ErrorInfoImpl(UNDEFINED_NAME_ERROR, new Segment(a_offset, a_length), a))); |
| } |
| } |
| } |
| } |
| |
| // private methods |
| private boolean isXMLElement(Element target) { |
| return target instanceof IDOMElement; |
| } |
| |
| private boolean hasUnknownPrefix(Element target) { |
| return isUnknownElement(target) && CMUtil.isForeign(target); |
| } |
| |
| private boolean isUnknownElement(Element target) { |
| CMElementDeclaration dec = CMUtil.getDeclaration(target); |
| return dec == null; |
| } |
| |
| private boolean isUnknownAttr(IDOMAttr attr, Element target) { |
| CMElementDeclaration dec = CMUtil.getDeclaration(target); |
| if (dec == null) |
| return true; // unknown. |
| CMNamedNodeMap adecls = dec.getAttributes(); |
| CMAttributeDeclaration adec = (CMAttributeDeclaration) adecls.getNamedItem(attr.getName()); |
| return adec == null; |
| } |
| |
| private boolean isValidPrefix(String prefix, Element e) { |
| if (prefix.equals(XMLNS_PREFIX)) |
| return true; // "xmlns:foo" attr is always valid. |
| |
| // (1) check the element has the namespace definition or not. |
| if (isValidPrefixWithinElement(prefix, e)) |
| return true; |
| |
| // (2) check ancestors of the element have the namespace definition or not. |
| Element parent = SMUtil.getParentElement(e); |
| while (parent != null) { |
| if (isValidPrefixWithinElement(prefix, parent)) |
| return true; |
| parent = SMUtil.getParentElement(parent); |
| } |
| return false; |
| } |
| |
| private boolean isValidPrefixWithinElement(String prefix, Element e) { |
| String ns = XMLNS_PREFIX + NS_SEPARATOR + prefix; |
| NamedNodeMap attrs = e.getAttributes(); |
| for (int i = 0; i < attrs.getLength(); i++) { |
| Node n = attrs.item(i); |
| if (n == null) |
| continue; |
| if (n.getNodeType() != Node.ATTRIBUTE_NODE) |
| continue; |
| if (ns.equals(((Attr) n).getName())) |
| return true; |
| } |
| return false; |
| } |
| } |