| /* DomHTMLCollection.java -- |
| Copyright (C) 2005 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package gnu.xml.dom.html2; |
| |
| import gnu.xml.dom.DomDOMException; |
| import gnu.xml.dom.DomElement; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import java.util.List; |
| import org.w3c.dom.DOMException; |
| import org.w3c.dom.NamedNodeMap; |
| import org.w3c.dom.Node; |
| import org.w3c.dom.NodeList; |
| import org.w3c.dom.html2.HTMLCollection; |
| import org.w3c.dom.html2.HTMLOptionsCollection; |
| import org.w3c.dom.traversal.NodeFilter; |
| import org.w3c.dom.traversal.NodeIterator; |
| |
| /** |
| * An HTML element collection. |
| * |
| * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> |
| */ |
| class DomHTMLCollection |
| implements HTMLCollection, HTMLOptionsCollection, NodeList, NodeFilter |
| { |
| |
| final DomHTMLDocument doc; |
| final Node root; |
| List nodeNames; |
| List attributeNames; |
| List results; |
| |
| DomHTMLCollection(DomHTMLDocument doc, Node root) |
| { |
| this.doc = doc; |
| this.root = root; |
| } |
| |
| // -- Node name and attribute filtering -- |
| |
| void addNodeName(String name) |
| { |
| if (nodeNames == null) |
| { |
| nodeNames = new LinkedList(); |
| } |
| nodeNames.add(name); |
| } |
| |
| void addAttributeName(String name) |
| { |
| if (attributeNames == null) |
| { |
| attributeNames = new LinkedList(); |
| } |
| attributeNames.add(name); |
| } |
| |
| public short acceptNode(Node n) |
| { |
| if (n.getNodeType() != Node.ELEMENT_NODE) |
| { |
| return NodeFilter.FILTER_SKIP; |
| } |
| String localName = n.getLocalName(); |
| if (localName == null) |
| { |
| localName = n.getNodeName(); |
| } |
| if (nodeNames != null && !acceptName(localName)) |
| { |
| return NodeFilter.FILTER_SKIP; |
| } |
| if (attributeNames != null && !acceptAttributes(n.getAttributes())) |
| { |
| return NodeFilter.FILTER_SKIP; |
| } |
| return NodeFilter.FILTER_ACCEPT; |
| } |
| |
| private boolean acceptName(String name) |
| { |
| for (Iterator i = nodeNames.iterator(); i.hasNext(); ) |
| { |
| String nodeName = (String) i.next(); |
| if (nodeName.equalsIgnoreCase(name)) |
| { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private boolean acceptAttributes(NamedNodeMap attrs) |
| { |
| for (Iterator i = attributeNames.iterator(); i.hasNext(); ) |
| { |
| String attributeName = (String) i.next(); |
| Node attr = getNamedItem(attrs, attributeName); |
| if (attr != null) |
| { |
| // Check that attribute has a non-null value |
| String nodeValue = attr.getNodeValue(); |
| if (nodeValue != null && nodeValue.length() > 0) |
| { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Case-insensitive version of getNamedItem. |
| */ |
| private Node getNamedItem(NamedNodeMap attrs, String name) |
| { |
| int len = attrs.getLength(); |
| for (int i = 0; i < len; i++) |
| { |
| Node attr = attrs.item(i); |
| String attrName = attr.getLocalName(); |
| if (attrName == null) |
| { |
| attrName = attr.getNodeName(); |
| } |
| if (name.equalsIgnoreCase(attrName)) |
| { |
| return attr; |
| } |
| } |
| return null; |
| } |
| |
| // -- Perform query -- |
| |
| void evaluate() |
| { |
| NodeIterator i = doc.createNodeIterator(root, NodeFilter.SHOW_ELEMENT, |
| this, true); |
| results = new ArrayList(); |
| for (Node node = i.nextNode(); node != null; node = i.nextNode()) |
| { |
| results.add(node); |
| } |
| } |
| |
| // -- HTMLCollection/NodeList interface -- |
| |
| public int getLength() |
| { |
| return results.size(); |
| } |
| |
| public void setLength(int length) |
| { |
| throw new DomDOMException(DOMException.NOT_SUPPORTED_ERR); |
| } |
| |
| public Node item(int index) |
| { |
| return (Node) results.get(index); |
| } |
| |
| public Node namedItem(String name) |
| { |
| boolean xhtml = false; // FIXME detect XHTML document |
| for (Iterator i = results.iterator(); i.hasNext(); ) |
| { |
| Node node = (Node) i.next(); |
| NamedNodeMap attrs = node.getAttributes(); |
| Node attr = getNamedItem(attrs, "id"); |
| if (name.equals(attr.getTextContent())) |
| { |
| return node; |
| } |
| if (!xhtml) |
| { |
| attr = getNamedItem(attrs, "name"); |
| if (name.equals(attr.getTextContent())) |
| { |
| return node; |
| } |
| } |
| } |
| return null; |
| } |
| |
| } |
| |