/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package com.sun.perseus.model;
import com.sun.perseus.platform.URLResolver;
import com.sun.perseus.util.SVGConstants;
import org.w3c.dom.DOMException;
/**
* Represents an SVG Tiny <code><a></code> element.
* An anchor is a simple <code>Group</code> extension which
* simply has a href and a target attribute.
*
* @version $Id: Anchor.java,v 1.4 2006/04/21 06:36:17 st125089 Exp $
*/
public class Anchor extends Group {
/**
* The anchor's hyperlink reference
*/
protected String href = "";
/**
* The anchor's target
*/
protected String target = "";
/**
* Constructor.
*
* @param ownerDocument this element's owner <code>DocumentNode</code>
*/
public Anchor(final DocumentNode ownerDocument) {
super(ownerDocument);
}
/**
* @return the SVGConstants.SVG_A_TAG value
*/
public String getLocalName() {
return SVGConstants.SVG_A_TAG;
}
/**
* Used by <code>DocumentNode</code> to create a new instance from
* a prototype <code>AnchorNode</code>.
*
* @param doc the <code>DocumentNode</code> for which a new node is
* should be created.
* @return a new <code>Anchor</code> for the requested document.
*/
public ElementNode newInstance(final DocumentNode doc) {
return new Anchor(doc);
}
/**
* This returns the <b>absolute</b> URI, even though
* the href may have been a relative URI
*
* @return this anchor's href, as an absolute URL or
* null if the href set was null or if the
* absolute URL could not be computed.
*/
public String getHref() {
String uriBase = getURIBase();
String docBase = ownerDocument.getURIBase();
if (uriBase != null
&& uriBase.equals(docBase)
&& href != null
&& href.length() > 0
&& href.charAt(0) == '#') {
// IMPORTANT: this prevents prepending the document URI
// to a relative URI if the reference is a local one.
// See:
// http://www.ietf.org/rfc/rfc2396.txt
// Paragraph 4.2 Same-Document References.
uriBase = null;
}
try {
if (uriBase != null) {
return URLResolver.resolve(uriBase, href);
} else {
return href;
}
} catch (IllegalArgumentException iae) {
return null;
}
}
/**
* @param href the new anchor's href
*/
public void setHref(final String href) {
if (href == null) {
throw new IllegalArgumentException();
}
if (href.equals(this.href)) {
return;
}
modifyingNode();
this.href = href;
modifiedNode();
}
/**
* @return the anchor's target
*/
public String getTarget() {
return target;
}
/**
* @param target the new anchor target. Should not be null.
*/
public void setTarget(final String target) {
if (target == null) {
throw new IllegalArgumentException();
}
if (target.equals(this.target)) {
return;
}
modifyingNode();
this.target = target;
modifiedNode();
}
/**
* Anchor handles the target trait.
*
* @param traitName the name of the trait which the element may support.
* @return true if this element supports the given trait in one of the
* trait accessor methods.
*/
boolean supportsTrait(final String traitName) {
if (SVGConstants.SVG_TARGET_ATTRIBUTE == traitName) {
return true;
} else {
return super.supportsTrait(traitName);
}
}
/**
* Supported traits: xlink:href
*
* @param namespaceURI the trait's namespace.
* @param traitName the name of the trait which the element may support.
* @return true if this element supports the given trait in one of the
* trait accessor methods.
*/
boolean supportsTraitNS(final String namespaceURI,
final String traitName) {
if (SVGConstants.XLINK_NAMESPACE_URI == namespaceURI
&&
SVGConstants.SVG_HREF_ATTRIBUTE == traitName) {
return true;
} else {
return super.supportsTraitNS(namespaceURI, traitName);
}
}
/**
* Anchor handles the target trait.
*
* @param name the requested trait name
* @return the requested trait's value.
*
* @throws DOMException with error code NOT_SUPPORTED_ERROR if the requested
* trait is not supported on this element or null.
* @throws DOMException with error code TYPE_MISMATCH_ERR if requested
* trait's computed value cannot be converted to a String (SVG Tiny only).
*/
public String getTraitImpl(final String name)
throws DOMException {
if (SVGConstants.SVG_TARGET_ATTRIBUTE == name) {
return getTarget();
} else {
return super.getTraitImpl(name);
}
}
/**
* Anchor handles the xlink:href attribute
*
* @param namespaceURI the URI for the requested trait.
* @param name the requested trait's local name (i.e., un-prefixed).
*
* @return the requested trait's value, as a string.
*
* @throws DOMException with error code NOT_SUPPORTED_ERROR if the requested
* trait is not supported on this element or null.
* @throws DOMException with error code TYPE_MISMATCH_ERR if requested
* trait's computed value cannot be converted to a String (SVG Tiny only).
* @throws SecurityException if the application does not have the necessary
* privilege rights to access this (SVG) content.
*/
String getTraitNSImpl(final String namespaceURI,
final String name)
throws DOMException {
if (SVGConstants.XLINK_NAMESPACE_URI == namespaceURI
&&
SVGConstants.SVG_HREF_ATTRIBUTE == name) {
String res = getHref();
if (res == null) {
res = href;
}
return res;
} else {
return super.getTraitNSImpl(namespaceURI, name);
}
}
/**
* Anchor handles the target trait.
*
* @param name the name of the trait to set.
* @param value the value of the trait to set.
*
* @throws DOMException with error code NOT_SUPPORTED_ERROR if the requested
* trait is not supported on this element or null.
* @throws DOMException with error code TYPE_MISMATCH_ERR if the requested
* trait's value cannot be specified as a String
* @throws DOMException with error code INVALID_ACCESS_ERR if the input
* value is an invalid value for the given trait or null.
* @throws DOMException with error code NO_MODIFICATION_ALLOWED_ERR: if
* attempt is made to change readonly trait.
*/
public void setTraitImpl(final String name,
final String value)
throws DOMException {
if (SVGConstants.SVG_TARGET_ATTRIBUTE == name) {
if (value == null) {
throw illegalTraitValue(name, value);
}
setTarget(value);
} else {
super.setTraitImpl(name, value);
}
}
/**
* Anchor supports the xlink:href trait.
*
* @param namespaceURI the URI for the trait's namespace.
* @param name the trait's local name (i.e., un-prefixed).
* @param value the trait's value.
*
* @throws DOMException with error code NOT_SUPPORTED_ERROR if the requested
* trait is not supported on this element or null.
* @throws DOMException with error code TYPE_MISMATCH_ERR if the requested
* trait's value cannot be specified as a String
* @throws DOMException with error code INVALID_ACCESS_ERR if the input
* value is an invalid value for the given trait or null.
* @throws DOMException with error code NO_MODIFICATION_ALLOWED_ERR: if
* attempt is made to change readonly trait.
* @throws SecurityException if the application does not have the necessary
* privilege rights to access this (SVG) content.
*/
public void setTraitNSImpl(final String namespaceURI,
final String name,
final String value)
throws DOMException {
try {
if (SVGConstants.XLINK_NAMESPACE_URI == namespaceURI
&&
SVGConstants.SVG_HREF_ATTRIBUTE == name) {
setHref(value);
} else {
super.setTraitNSImpl(namespaceURI, name, value);
}
} catch (IllegalArgumentException iae) {
throw new DOMException(DOMException.INVALID_ACCESS_ERR,
iae.getMessage());
}
}
/**
* @param traitName the trait name.
*/
TraitAnim createTraitAnimImpl(final String traitName) {
if (SVGConstants.SVG_TARGET_ATTRIBUTE == traitName) {
return new StringTraitAnim(this, NULL_NS, traitName);
} else {
return super.createTraitAnimImpl(traitName);
}
}
/**
* @param traitName the trait name.
* @param traitNamespace the trait's namespace. Should not be null.
*/
TraitAnim createTraitAnimNSImpl(final String traitNamespace,
final String traitName) {
if (traitNamespace == SVGConstants.XLINK_NAMESPACE_URI
&&
traitName == SVGConstants.SVG_HREF_ATTRIBUTE) {
return new StringTraitAnim(this, traitNamespace, traitName);
}
return super.createTraitAnimNSImpl(traitNamespace, traitName);
}
public String toString() {
return "Anchor[href=(" + href + ") absolute href=(" + getHref() + ")]";
}
}
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