XHTML subclass of "DomElement", implementing HTMLElement and knowing * about its namespace and the legal element names in that namespace. * *
In the HTML DOM, the following HTML elements offer no further * functionality than is offered by this class (although they have non-XHTML * rules affecting case normalization in names): HEAD, SUB, SUP, SPAN, BDO, * TT, I, EM, B, U, S, STRIKE, BIG, SMALL, EM, STRONG, CODE, DFN, SAMP, KBD, * VAR, CITE, ACRONYM, ABBR, DD, DT, NOFRAMES, NOSCRIPT, ADDRESS, CENTER. * Ninety or so other elements exist, and are defined to use subtypes of * the HTMLElement interface.
* *DOM Level 2 defines an HTMLElementCSS interface to support access * to the CSS style information for an element; this is not supported by * this implementation, since that is part of the "CSS" stylesheet feature.
* *NOTE: At this writing, constraints on legal XHTML attribute names * are not enforced. * * @author David Brownell * @version $Date: 2002/09/30 15:08:51 $ */ public class XhtmlDomElement extends DomElement implements HTMLElement { // all names in the XHTML element vocabulary private static final String xhtmlElementNames [] = { "html", "head", "title", "base", "meta", "link", "style", "script", "noscript", "iframe", "noframes", "body", "div", "p", "h1", "h2", "h2", "h3", "h4", "h5", "h6", "ul", "ol", "menu", "dir", "li", "dl", "dt", "dd", "address", "hr", "pre", "blockquote", "center", "ins", "del", "a", "span", "bdo", "br", "em", "strong", "dfn", "code", "samp", "kbd", "var", "cite", "abbr", "acronym", "q", "sub", "sup", "tt", "i", "b", "big", "small", "u", "s", "strike", "basefont", "font", "object", "param", "applet", "img", "map", "area", "form", "label", "input", "select", "optgroup", "option", "textarea", "fieldset", "legend", "button", "isindex", "table", "caption", "thead", "tfoot", "tbody", "colgroup", "col", "tr", "th", "td", "frameset", "frame", }; private static final Hashtable xhtmlElements; static { Hashtable ht = new Hashtable ((int)(xhtmlElementNames.length * 1.5)); for (int i = 0; i < xhtmlElementNames.length; i++) ht.put (xhtmlElementNames [i], xhtmlElementNames [i]); xhtmlElements = ht; } /** * Constructs an XHTML Element node associated with the specified document. * *
This constructor should only be invoked by a Document as part * of its createElement functionality, or through a subclass which is * similarly used by the Document class in a "Sub-DOM" style layer. * * @param owner The document with which this element is associated * @param name Name of this element, which may include a prefix * @exception DOMException NOT_SUPPORTED_ERR if the local part of * the name is not in the XHTML 1.0 element vocabulary */ protected XhtmlDomElement (Document owner, String name) { super (owner, XhtmlDomImpl.xhtmlNamespace, name); if (xhtmlElements.get (getLocalName ()) == null) throw new DomEx (DomEx.NOT_SUPPORTED_ERR, name, null, 0); } // XXX should probably use namespace URIs for all attributes /** Returns the "id" attribute of this element, or null. */ final public String getId () { return getAttribute ("id"); } /** * Assigns the "id" attribute of this element. * If the string is not an XML name, a DOM exception is reported. * If the element is an "a" element, or another of the HTML elements * for which a "name" attribute is defined, its "name" is also set to * ensure that these deprecated attributes remain consistent. */ final public void setId (String id) { String local = getLocalName (); DomDocument.verifyXmlName (id); setAttribute ("id", id); if ("a".equals (local) || "applet".equals (local) || "frame".equals (local) || "iframe".equals (local) || "img".equals (local) || "map".equals (local)) setAttribute ("name", id); } /** Returns the "title" attribute of this element, or null. */ final public String getTitle () { return getAttribute ("title"); } /** Assigns the "title" attribute of this element. */ final public void setTitle (String title) { setAttribute ("title", title); } /** * Returns the "xml:lang" attribute of this element, or the value * of the "lang" attribute if there is none; searches parents for * such values, as appropriate. */ public String getLang () { String retval = getAttribute ("xml:lang"); if (retval == null) retval = getAttribute ("lang"); if (retval != null) return retval; Node parent = getParentNode (); if (parent == null || !(parent instanceof HTMLElement)) return null; return ((HTMLElement) parent).getLang (); } /** * Sets the "lang" and "xml:lang" attributes of this element. * These values must be in the standard IETF form for such langauge * identifiers; the value is not currently checked for errors. */ final public void setLang (String lang) { setAttribute ("lang", lang); setAttribute ("xml:lang", lang); } /** * Returns the "dir" attribute of this element; searches parents * for such a value, as appropriate. */ public String getDir () { String retval = getAttribute ("dir"); if (retval != null) return retval; Node parent = getParentNode (); if (parent == null || !(parent instanceof HTMLElement)) return null; return ((HTMLElement) parent).getDir (); } /** Assigns the "dir" attribute of this element. */ public void setDir (String dir) { // simple to test this for legality if ("ltr".equals (dir) || "rtl".equals (dir)) setAttribute ("dir", dir); else throw new DomEx (DomEx.NOT_SUPPORTED_ERR, dir, null, 0); } /** Returns the name of the CSS "class" attribute of this element. */ final public String getClassName () { return getAttribute ("class"); } /** Assigns the CSS "class" attribute of this element. */ final public void setClassName (String className) { setAttribute ("class", className); } }