org.w3c.css.properties.css3.CssLink Maven / Gradle / Ivy
//
// $Id: CssLink.java,v 1.3 2010-01-05 13:49:53 ylafon Exp $
// From Sijtsche de Jong ([email protected])
//
// (c) COPYRIGHT 1995-2003 World Wide Web Consortium (MIT, ERCIM,
// Keio University)
// Please first read the full copyright statement at
// http://www.w3.org/Consortium/Legal/copyright-software-19980720
package org.w3c.css.properties.css3;
import org.w3c.css.parser.CssStyle;
import org.w3c.css.properties.css.CssProperty;
import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
import org.w3c.css.values.CssFunction;
import org.w3c.css.values.CssIdent;
import org.w3c.css.values.CssValue;
/**
*
* Value: none | | attr(X) | down-attr(X) | up-attr(X) |
* inherit
* Initial:none
* Applies to:all elements
* Inherited:no
* Percentages:no
* Media::all
*
* Specifies whether an element is the source of a link and where to find
* the URL of the link target.
*/
public class CssLink extends CssProperty {
CssValue link;
static CssIdent none = new CssIdent("none");
/**
* Create a new CssLink
*/
public CssLink() {
link = none;
}
/**
* Create a new CssLink
*
* @param expression The expression for this property
* @exception InvalidParamException Incorrect value
*/
public CssLink(ApplContext ac, CssExpression expression, boolean check)
throws InvalidParamException {
setByUser();
CssValue val = expression.getValue();
if (val.equals(none)) {
link = none;
expression.next();
} else if (val.equals(inherit)) {
link = inherit;
expression.next();
} else if (val instanceof CssFunction) {
CssFunction attr = (CssFunction) val;
CssExpression params = attr.getParameters();
CssValue v = params.getValue();
if (attr.getName().equals("attr")) {
if ((params.getCount() != 1)
|| !(v instanceof CssIdent)) {
throw new InvalidParamException("attr",
params.getValue(),
getPropertyName(), ac);
}
} else if (attr.getName().equals("down-attr")) {
if ((params.getCount() != 1)
|| !(v instanceof CssIdent)) {
throw new InvalidParamException("function",
params.getValue(),
getPropertyName(), ac);
}
} else if (attr.getName().equals("up-attr")) {
if ((params.getCount() != 1)
|| !(v instanceof CssIdent)) {
throw new InvalidParamException("function",
params.getValue(),
getPropertyName(), ac);
}
}
else{
throw new InvalidParamException("value", expression.getValue(),
getPropertyName(), ac);
}
}
}
public CssLink(ApplContext ac, CssExpression expression)
throws InvalidParamException {
this(ac, expression, false);
}
/**
* Add this property to the CssStyle
*
* @param style The CssStyle
*/
public void addToStyle(ApplContext ac, CssStyle style) {
if (((Css3Style) style).cssLink != null)
style.addRedefinitionWarning(ac, this);
((Css3Style) style).cssLink = this;
}
/**
* Get this property in the style.
*
* @param style The style where the property is
* @param resolve if true, resolve the style to find this property
*/
public CssProperty getPropertyInStyle(CssStyle style, boolean resolve) {
if (resolve) {
return ((Css3Style) style).getLink();
}
else {
return ((Css3Style) style).cssLink;
}
}
/**
* Compares two properties for equality.
*
* @param value The other property.
*/
public boolean equals(CssProperty property) {
return (property instanceof CssLink &&
link.equals(((CssLink) property).link));
}
/**
* Returns the name of this property
*/
public String getPropertyName() {
return "link";
}
/**
* Returns the value of this property
*/
public Object get() {
return link;
}
/**
* Returns true if this property is "softly" inherited
*/
public boolean isSoftlyInherited() {
return link.equals(inherit);
}
/**
* Returns a string representation of the object
*/
public String toString() {
return link.toString();
}
/**
* Is the value of this property a default value
* It is used by alle macro for the function print
*/
public boolean isDefault() {
return (link == none);
}
}